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All unanswered questions are deemed unnecessary by the experts
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A: Single-phase inverter parallel operation system
1Q: What is the DC power supply voltage in question A? Is it fixed? In addition, can a dedicated SPWM chip such as EG8010 be used?
A: The DC power supply output voltage is self-determined and cannot be adjusted during the test; a dedicated chip can be used.
2Q: Question A, requirement 7, the two inverters each use a ** controller. Does this controller refer to the MCU? For example, DSP or other single-chip microcomputers, or STM32? Not the power circuit?
A: The controller refers to the MCU.
3Q: Can the load resistor of question A be brought separately?
A: It can be brought separately.
4Q: The two controllers in question A are **, but are they allowed to communicate by wire?
A: No wired communication is allowed.
5Q: What is the specific input voltage of DC power supplies 1 and 2?
A: This question is the same as the first question.
6Q: Question A, the equipment list says a power supply of 0 to 30V, but question A requires a higher voltage. Do I need to design a boost circuit myself?
A: Understand it yourself.
7. Q: What is the required accuracy for controlling the current size and ratio in Questions 2 and 3 of the performance part? Is it required to be continuously adjustable?
A: The accuracy is required in the question. Continuously adjustable.
8. Q: Can the DC power supply only be the one in the material list? A:
No.
9. Q: What does it mean to prepare the DC power supply in Article 8?
A: Bring it yourself during the test, no need to seal the box.
10. Q: Is it required to switch immediately when connecting to the grid? Can it be done manually by pressing a button?
A: No, it cannot be done manually. It will be automatically connected when the grid connection requirements are met.
11. Q: The voltage of the self-prepared power supply is not specified. Can it be set by yourself?
A: It can be set by yourself.
12. Q: When opening and closing S1 and S2, is it required to operate the inverter with power on, or can the inverter be stopped first, the switch be set, and then the inverter be started?
A: It can be set and then the inverter can be started.
13. Q: Does the competition test site provide the DC power supplies 1 and 2 in the figure? If not, do the participating teams need to prepare the voltage source instruments by themselves? Do they bring them on the day of the review?
A: Such questions have been answered.
14Q: 2. How to measure THD and efficiency on site? Does the test site provide a power analyzer?
Answer: Use a power analyzer. This equipment is available at the national retest site.
15Q: What is the power capacity and voltage of the transformer in question A? Is it the 200VA 24V in the material list?
Answer: No answer.
16Q: 1). Can the two inverters communicate with each other? 2). How many sets of keyboards and displays are there?
Answer: 1). Answered; 2). Determined according to needs
. 17Q: Since the self-prepared equipment is heavy, can the self-prepared equipment be shared by the groups of the same university during the evaluation? That is, the participating groups of question A in the same university only seal a few sets of evaluation equipment for each group to share?
Answer: This is a disclosure of school information in front of the evaluation experts.
18Q: In question A, the basic requirement (1) is to open S2, close S1, and only use inverter 1 to supply power to RL. At this time, is DC power supply 2 in the off state?
Answer: It can be turned off.
19Q: In the explanation of question A (8), does "the DC power supply 1 and DC power supply 2 for this question are prepared by ourselves" mean that we need to seal our own DC power supply? Or will the DC power supply be provided at the assessment site? Is the power supply provided at the assessment site 0-30V or higher?
A: This type of question has been answered.
20Q: Question A: "The DC power supply output voltage is self-determined" can be self-determined within any range? Or can it only be self-determined within the range of 0-30V?
A: There is no limit on the voltage range.
21Q: Question A requires one power supply for one inverter circuit. The auxiliary power supply needs power supply, and the circuit also needs power supply. If two modules share the same power supply at the same time, it will cause a short circuit. How to solve it?
A: Solve it by yourself.
22Q: Is wireless communication possible?
A: No.
23Q: Can the load resistor in the question be replaced by the constant resistance mode of an electronic load?
A: Electronic load cannot be used.
24Q: In question A, I0 can be adjusted from 0 to 2A. So what is the upper limit of the resistance load we buy? 0 amperes means infinite resistance. There is no way to do this or tell us the minimum measured current?
Answer: 0A, open circuit.
25Q: Question A: In the schematic diagram of Figure 1, can some circuits or components be added between s2 and the transformer?
Answer: The relevant circuits and components are all on the inverter side.
26Q: Can this given voltage be slowly increased from 0 to a fixed value or directly turned on? 27Q
: In the improvement part, when switching from off-grid state to grid-connected state, is it allowed to operate the switch on the control panel to achieve state switching?
Answer: Such questions have been answered.
28Q: Can a DC power supply be divided into two parallel power supplies using one module?
Answer: Yes. 29Q: Can the grid-connected and off-grid states be switched manually?
Answer: Such questions have been answered. 30Q: Can
the grid-connected and off-grid states be switched manually
using the grid waveform signal when S2 is closed (before grid-connected)?
Answer: No answer.
B: Coaxial cable length and terminal load detection device
1 Question: In the description of question b, does "shorten to the specified length" mean shortening the cable according to the requirements of the test expert?
Answer: Yes.
2 Question: The last sentence of the "Task" part of question B says that the system needs to be powered by a single 6V power supply. Does this include the main control?
Answer: The entire device is powered by a single power supply of no more than 6V.
3 Question: Can the cable shell in question B be grounded and connected to the detector?
Answer: The shell should refer to the shielding layer, right? The shielding layer can be connected to the detection device. The cable shell should be an insulator. See Figure 1 of the question.
4 Question: Can the power supply of question B be powered by the student power supply?
Answer: The power supply can meet the requirements.
5 Question: In question B, can multiple cables be connected and used for the final test?
Answer: Multiple cables cannot be connected.
6 Question: Are there any requirements for the cable specifications of question B?
Answer: The cable specifications are self-determined.
7 Question: Can an output port or sampling port be connected to the cable or load end?
Answer: The cable can only be connected to the detection device at the beginning. The question has been made very clear.
8Q: In question B, how to connect the specified load after cutting the cable? Is it on-site welding?
A: Just connect the core wire and the shielding layer of the load pin.
C: Inductance and capacitance measurement device
First, unanswered questions will not be explained.
1Q: In question C, can the oscillator be implemented with FPGA? FPGA generates signals, and TI processor controls FPGA. Can FPGA be used here? In addition, the question requires the simultaneous measurement of capacitance and inductance? Or is the inductor plugged in to measure the inductance, and the capacitor plugged in to measure the capacitance? Is it required to plug in two devices at the same time?
A: FPGA can be used. What is plugged in, what is measured. Capacitors and inductors can use different sockets respectively.
2Q: Question C: Is the "self-determined fixed measurement frequency" of capacitance and the "self-determined measurement frequency" of inductance a fixed frequency preset by the participating team or does the tester randomly input the measurement frequency on-site through the peripheral device?
A: The frequency is self-determined, and it can be within the range requirements.
3Q: Is the loss angle to be measured in question C the capacitance loss angle or the dielectric loss angle?
4Q: Are the measurements of capacitance and inductance separate? Is it not necessary for the device to detect the type of the device under test by itself?
Answer: No need to detect the type.
5Q: Can the calibration values of D and Q be obtained by calculation?
Answer: First of all, measurement is required. Of course, calculation is required based on the measurement results to obtain the results.
6Q: We don’t know what the third frequency range of the performance requirement means. I would like to ask the experts whether it is possible to sweep the frequency within these two ranges below 2M and above 20M, or can only fix a frequency as in the basic requirements?
Answer: Sweep the frequency within the specified range or fix the frequency.
7Q: The second sentence of the "Task" section says "After one-click start, complete the measurement within the specified time." Does this sentence mean "the development board can be powered on first and start measuring with one click", or does the development board not need to be powered on and run in advance, and can only be powered on and measured after pressing the button?
Answer: It can be powered on first.
8Q: The requirement "The participating teams need to prepare their own commercial measuring instruments, referred to as self-prepared measuring instruments, in order to calibrate the homemade measuring devices."
Can an oscilloscope be used to measure and display the frequency?
Answer: There is no requirement to measure the frequency. The instrument can monitor the frequency accurately with an error of less than 1%.
9. Question: In question C, do you need to seal the measuring instruments (2) that you bring with you when you go to the test, or can
you bring them in during the test? Answer: You don’t need to seal them. You can bring them with you during the test. It is possible that multiple teams from the same school will share instruments.
10. Question: In the advanced part of question C, the measurement frequency is required to be above 20Mhz, but even the LMC555 has a maximum frequency of only 3Mhz, which cannot meet the requirement. How do you solve this problem? At the same time, there is a lack of commercial measuring instruments for the evaluation, so it is impossible to accurately and stably calculate the measurement error.
Answer: Design it yourself.
11. Question: Do you need to design and make a frequency meter for monitoring?
Answer: Not allowed. Use a frequency meter for monitoring.
12. Question: Do you need to monitor the capacitance and inductance on the same circuit board? That is, the circuit for measuring capacitance is on one circuit board and the circuit for measuring inductance is on another circuit board.
Answer: You can separate the two circuit boards or combine them into one.
13. Question: Can you perform multiple measurements during the measurement, or get the result in one measurement?
Answer: Measure once and display stably.
14. Question: Is the self-resonant frequency range of the inductor within the measurement range of 2-20M?
A: Not necessarily.
Q15: In the frequency self-determination requirement in Part 3, is the frequency fixed or variable for measuring different inductances?
A: Both are possible. Measure within the specified frequency range.
Q16: Question C, one-button start measurement means that all functions are automatically tested after pressing the button, or can different one-button start buttons be selected when completing different function measurements?
A: Connect a component to be measured, press the button once, and measure 2 parameters. Inductance and capacitance can each use one button. Parameter range selection is not allowed.
Q17: For the measurement value of the self-prepared measuring instrument, does it need to be brought to the site for on-site measurement or can the measurement value be determined in the school in the form of pictures or videos?
A: It must be brought to the site.
Q18: For the one-button start in question C, there are two buttons in the circuit, one for starting capacitance measurement and the other for starting inductance measurement. Is it possible?
A: Yes.
Q19: Inductance is required to be measured at two frequencies. Does this require automatic conversion, or can it be selected by buttons?
A: Measure in different frequency bands according to requirements, and do not automatically convert. Either button selection or setting is acceptable.
Q20: Is it allowed to use DDS devices?
Q21: In question C, “Complete the measurement of inductance and quality factor”, is the definition of inductor quality factor the ratio of inductive reactance to resistance at the self-resonant frequency of the inductor?
A: Self-study.
Q22: In question C, add the following supplementary explanation: “In question C, remove the word “suggestion” from explanation 3 and replace it with part 3. That is, part 3 should be replaced with “(3) The test frequency of the self-made measuring device should be consistent with that of the self-prepared measuring instrument.”
D: Signal modulation identification and parameter estimation device
1 Question: In the digital modulation part of question D, since the data header may not be recognized, can we ignore the signal header? For example, if the input is 11110000-11110000-11110000, the output is 0000111100001111?
Answer: The binary keying signal output by the signal source does not have a specific data header, so just do it according to the requirements of the question.
2 Question: Does the code element of the digital modulation (2ASK, 2PSK, 2FSK) of question D require a random sequence? The code element generated by the signal source is a regular square wave signal of 010101. Can it meet the requirements?
Answer: The question requires the use of internal modulation to generate an output binary keying signal, and the internal modulation signal is a square wave.
3 Question: Does the frequency deviation of the FSK signal used in the actual test swing around the carrier frequency or only on one side of the center frequency?
Answer: Whether the frequency deviation of the FSK signal used in the actual test swings around the carrier frequency or only on one side of the center frequency is determined by the self-used signal generator. Both are possible.
4. Q: In the basic requirement (3), do you know that the carrier frequency of the unknown modulated signal is also 2MHz?
A: The carrier frequency of the input signal in the basic requirement and the development part of question D is always 2MHz.
5. Q: If the function generator D cannot change the digital signal, do you need to make an external signal source to make the function generator modulate?
A: The question is very clear, use the internal modulation signal of the function generator.
6. Q: Can DDS output signal be used after demodulation?
A: It needs to be truly demodulated and output.
7. Q: Is a mature software and hardware platform available? Can the device be used with a host computer (computer)? If it is a board, can it be used with an external monitor?
A: According to the requirements of the question, it is prohibited. It cannot be equipped with a host computer. When the work is tested, it is not allowed to bring a computer into the test site. This question only needs to display characters, and an LCD screen or even a digital tube can meet the display needs. The question requires the use of an oscilloscope to observe the waveform of the demodulated signal.
8. Q: The carriers of the other adjustment methods are all 2MHz, but the two carriers of 2FSK are not specified. Can they be used as known conditions in the identification system?
Answer: The deviation between the two carrier frequencies of 2FSK is not large, just around 2MHz.
Question 9: What is the form of the CW continuous wave in question D? Is there a reference type?
Answer: You can check the communication principle textbook to find out what CW is. This is the most basic concept question.
Question 10: Question D: Do you need to set code elements for 2ASK, 2FSK, and 2PSK?
Answer: Use the modulated square wave in the signal source as the binary code. This type of question has been answered several times before.
Question 11: Question D: FM modulation, is there a range for frequency deviation?
Answer: The frequency modulation coefficient and modulation frequency given in the question, multiplied by the two is the maximum frequency deviation. This is another basic concept question. This type of question will no longer be answered in the future.
Question 12: Does the self-prepared signal generator in question D need to be sealed together with the electronic competition work?
Answer: No.
Question 13: The transmission binary non-return-to-zero (NRZ) code in the development part of question D is generated by the specific equipment provided by the organizing committee during the acceptance, and then connected to our self-prepared signal generator for modulation. Or do the participating teams need to make their own equipment that can generate binary non-return-to-zero codes at the corresponding code rate and bring them to the test? In addition, if the binary code generating equipment is provided by the organizing committee, what are the parameters of the binary code (such as high and low level voltages)? Thank you!
Answer: Use your own signal generator to generate it. All participants must bring their own function generator that can generate the specified signal to participate in the test, and the function generator does not need to be sealed.
14 Question: What are the requirements for the binary code sequence generated by the instrument in question D?
Answer: The square wave signal waveform is modulated in the function generator.
E: Moving target control and automatic tracking system
1 Question: Can openmv be used in question E?
Answer: Only laptops and desktops are prohibited in question E. Any other
2 Question: Can the target motion tracking system in question E be used with a Raspberry Pi?
Answer: Same as above.
3 Question: In question E, what is the height relationship between the gimbal and the screen?
Answer: Customized.
4 Question: What are the basic requirements for question E (1)? Is the position of the screen always fixed when automatic reset is performed?
Answer: Of course, only the green laser pen can be moved.
5 Question: Can the mainboard in question E be the Battleship Elite Mini version of stm32? Question E: Is it possible to reset after the test?
6. Question: Are there any special requirements for the material of the screen in the moving target control and automatic tracking system in question E?
Answer: White.
7. Question: Question E: 1. Are there any requirements for the placement of the camera module? It is not mentioned in the question; 2. Is the screen material for the on-site test determined? Can you provide the material name?
Answer: The screen can be brought by yourself. Others are self-determined.
8. Question: Question E: When packaging, do the screen and target paper need to be sealed and brought together? Or will the organizing committee provide them for all teams to use during the test?
Answer: Bring them by yourself after sealing. The competition area does not provide screens and target papers.
9. Question: Do the two laser pens in question E have to be lit after the test starts?
Answer: Self-determined.
10. Question: In the first question of the basic part of question E, "Pressing the button at any position can reset it." Do we need to be able to achieve any position by ourselves or do we only need to focus on being able to reset it?
Answer: The question has already made it very clear. The light spot can be reset to the origin through the reset function at any position.
11. Question: Is there any requirement for the screen height in question E?
Answer: Self-determined.
12. Question: In the first question of the basic part of question E, “Any position can be reset”, do we need to write a program to make the laser pen reach the desired position and then press a button to reset it, or do we not care about the position as long as it can be reset?
Answer: The question has been made very clear. The light spot can be reset to the origin at any position.
13. Question: Is there a clear boundary between the screen of the test site and the external environment?
Answer: There is no requirement.
14. Question: In the basic requirements (3) and (4), do you choose the position to paste the A4 target paper?
Answer: (3) Yes, you can choose it yourself. (4) Yes, you can choose it at any position. The question is very clear.
15. Question: The task says that the effective area of the screen must be greater than 0.6X0.6m. How big is it during the competition?
Answer: It can meet the requirements. The screen must be brought by yourself.
16. Question: Is there a limit on the size of the gimbal where the laser pen is located? Are external components allowed?
Answer: No, as long as the two systems are connected.
17. Question: In the basic requirements of question E (2), is the screen edge a square edge of 0.5 or an edge with an effective area greater than 0.6?
A: It only needs to meet the requirements, and the screen must be provided by itself.
Q18: Can a 2-centimeter-wide shading plate be added around the screen in question E?
A: The screen is already 10 cm larger than the target. You cannot draw anything other than the specified content on the screen.
19Q: In question E, if the red position control system and the green position control system are connected to a camera module at the same time, is it considered mutual interference?
Answer: Of course not if they share a camera.
20Q: In question E, is the black tape attached to A4 paper along the inner edge of the tape or the outer edge of the tape?
Answer: The outer edge of the tape is along the outer edge of the paper. It can't be attached to the outside of the A4 paper.
21Q: When starting the moving target control system, does it start from the origin or when the start button is pressed?
Answer: Of course it starts from the start button.
22Q: In question E, is there any requirement for the distance between the camera and the screen?
Answer: No.
23Q: The spot diameter is required to be ≤1cm. How to measure this? Is the halo around the whiteboard within the measurement range?
Answer: The halo does not count.
24Q: Basic requirement 1: Is it fixed at the beginning, and then the reset button resets it to the center, or is it placed randomly every time to let the pan-tilt find the center of the whiteboard?
Answer: The red system and the screen are fixed and will not change during the test.
25 Question: In question E, can we use a ready-made development board, or can we only buy the minimum system board? Do we need to make the rest ourselves?
Answer: Laptops and desktops cannot be used, and the rest must be customized.
26 Question: Question E: Moving target control and automatic tracking system, are there any requirements for the light intensity and light in the test environment?
Answer: No requirements.
27 Question: In question E, is the position of the green laser pen set by the participating team at random on the 0.6m line?
Answer: Random means specified by the test expert.
28 Question: In the practical part (1) of question E, is the tracking started after the moving target position is reset, or at the same time?
Answer: According to the requirements of the question.
29 Question: Can the participating team change the position of the screen in question E by themselves?
Answer: No.
30 Question: In the third explanation of question E, it is said that the spot position control system must be mutually compatible. Do they need to be powered by mutual compatibility?
Answer: Yes.
31 Question: Is the relative height between the 2D gimbal and the screen fixed?
32 Question: Is the rotation center point of the A4 target paper a custom position?
33 Question: Can white advertising cloth be used for the white screen in question E?
A: Review the questions and read the answers.
Q34: Do you need to press a button to start each question and enter a different mode, and complete each step separately? Or can you not press a button during the whole process?
Q35: Can you print or paste a non-electronic visual mark on the A4 paper for question E?
A: No.
Q36: What are the requirements for the size and shape of the center origin of question E?
A: The question says that the width is less than 1mm.
Q37: For the first question, can you manually calibrate (change the position of the gimbal or modify the servo angle by pressing a button) to align it with the center of the screen?
A: Yes.
Q38: Can you use a fill light for question E?
A: No.
Q39: For question E, are the positions of the gimbal and the motor fixed at the beginning? Or does the organizing committee randomly place the gimbal and turn it on and let us identify the origin?
A: Red is fixed, and green can move.
Q40: In question E, the basic requirement (3) says "0 points for continuous separation from the tape and movement of more than 5cm". What does "continuous separation" mean?
Q41: Can the pencil-drawn border line of question E be changed to a black pen?
Answer: According to the requirements of the question. No.
42 Question: What should be the diameter of the black dot at the center of the white background in question E?
Answer: It depends on the requirements of the question.
43 Question: Are the colors of the edges and center points of E pencil drawings fixed? Do the 2B pencil drawings have to be drawn by the contestants themselves or by the contestants themselves?
Answer: You can judge the questions yourself.
44 Question: In the third sub-question of the basic requirements, does the 30-second line tracing start counting when the machine is turned on or does it start counting when the black line is traced?
Answer: The time starts counting when the button is pressed.
45 Question: Does each gimbal need a main control chip? Can one main control chip control two gimbals?
Answer: According to the requirements of the question, it must be **.
46 Question: Is the color of the pencil darker? Some draw with a water pen, and the human eye can hardly recognize a 1mm pencil.
Answer: According to the requirements of the question.
47 Question: In question E, basic part (3), A4 target paper, can a 1.8cm border be directly drawn and printed out on A4 instead of sticking with electrical tape?
Answer: According to the requirements of the question.
Q48: Can I draw other graphics outside the 0.5*0.5m square on the recognition screen?
A: No.
Q49: What if the size of the box in question E is too large and cannot be sealed?
A: Seal the box according to the question requirements.
Q50: Can I use a visual module to transmit data to two single-chip microcomputers separately?
A: This is not **.
Q51: In the development part, when the green light spot tracks the red light spot on the black electrical glue, does it also have to chase along the black electrical glue?
A: According to the question requirements.
Q52: Basic requirements (3) Is the placement angle of the target paper fixed? If fixed, what is the placement angle ? A
: Custom means you can set it yourself.
Q53: In the development part 2, can one button control two systems at the same time? If using camera recognition, can one camera transmit data to two systems?
A: Refer to Q50.
Q54: When evaluating question E, can I debug my work separately between completing each task? For example, after completing basic task 1, I debug the work and then proceed to the evaluation of basic task 2?
Answer: You can debug it during the preparation stage, but you cannot debug it during the test stage.
55 Question: Can the gimbal only be a rotating gimbal? Can it be a translational gimbal?
Answer: It cannot be a translational gimbal
. 56 Question: Question E, is there a limit on the size of the gimbal?
Answer: You can determine it according to Figure 1 of the question.
57 Question: Question E, does the laser spot diameter of less than one centimeter mean that the central spot is less than one centimeter, or the entire aperture including divergence must be less than one centimeter?
Answer: See above.
58 Question: Question E: How many motors can be used for a two-dimensional electric gimbal?
Answer: You can determine it.
59 Question: Question E: Red and green spots will diverge. How to define the spot size? Is it the diameter of the center focus?
Answer: It does not count as halo.
60 Question: After the referee has placed the tracking system with a green laser pointer, is there a chance to debug and calibrate it?
Answer: Not allowed.
61Q: Can the visual module of the tracking system be fixed on the position control system with a red laser pointer without communicating with the position control system?
Answer: Must be **.
62Q: Is the color of the part outside 6060cm unlimited?
Answer: Give a unified answer. No additional requirements are allowed beyond the screen, including drawing lines, hanging dark cloth, placing blackboards, etc. The background can only be an ordinary laboratory background.
63Q: Question E, can a laptop be used as a display screen when it is not involved in the control?
Answer: A computer cannot be used.
64Q: In question E, does the servo use a battery or a power adapter? 65Q:
Is the screen in question E a hard whole panel, or is it just a soft curtain? During the test, the competition area provides a shelf that can be hung on it?
Answer: The competition area does not provide any screen devices. All screen devices must be brought by yourself.
66Q: In question E, the red position control system and the green position control system require mutual **. Does sharing a power supply count as mutual **?
Answer: The question is very clear. Either you have to identify whether it is the power supply or the communication through the power supply line.
Question 67: Question E: Are there any requirements for the surface roughness of the white screen material?
Answer: No answer.
Question 68: In basic (2), does the edge line refer to the 0.5*0.5 drawn in pencil?
Answer: Read the question carefully.
Question 69: Can a buzzer and LED be used for the sound and light prompt in (1)?
Answer: Of course.
Question 70: Can a stepper motor be used instead of a two-dimensional pan-tilt head?
Answer: No.
Question 71: Can a red laser pen be fixed at one point within the required range and not move from beginning to end?
Answer: The red pan-tilt head never moves. The laser pen is controlled by the pan-tilt head.
Question 72: Can a polarizer be added to the laser light source in Question E? Can the reset button be set using the reset button on the microcontroller?
Answer: It is a laser pen. No polarizer is added. As long as the reset function can be realized, it is fine.
73. Additional explanation for question E: "The motors used in the two-dimensional gimbal in question E are not limited to any type. However, stepper motors cannot be used to translate the laser pen."
74. Additional explanation for question E: "The red and green spot position control systems in question E must cooperate with each other, including the visual modules in the two systems. When the green system moves, its visual module must also move with the system. Otherwise, the two systems will have a position correlation, which is inconsistent with the meaning of the question."
F: Intelligent positioning system based on sound propagation
1 Question: In the undergraduate F question, what method is used to inject the sound signal into the flat plate, or can any method be used?
Answer: Injection is done using electroacoustic devices; how to connect the electroacoustic device and the flat plate is up to you; it can be glued directly or with a coupling agent.
2 Question: Can sound waves propagate in the air? Do they have to be injected into the acrylic plate?
Answer: Yes.
3 Question: Is it allowed to use Raspberry Pi?
Answer: Yes.
4 Question: In the four z zones, is there a limit on the number of sensors in each zone? Can each zone have both acoustic and electric devices, that is, an acoustic and electric device (four common sounding devices) and an electroacoustic device are placed in each corner; or only one electroacoustic device is used and the other four corners are acoustic and electric devices?
Answer: No limit.
4 Question: (1) Does the oscilloscope require the original acoustic and electric signals to receive the signal? Can it be filtered?
Answer: Yes.
5 Question: What tool is used and how is the knocking performed in F question (2) (hammer/other tool)?
A: As long as the end surface is small enough, the location of the knock can be distinguished, you can choose it by yourself.
Q6: Is it necessary to send a sweep signal while measuring the knocking in question F?
A: No sweep signal is sent when knocking.
Q7: What should be used for knocking in question F? Are there any regulations?
A: No limit, as long as the end surface is small enough. You can consider using a small wooden hammer.
Q8: Are there any specific regulations for the placement of the flat board? Can you bring your own shelf ? A: You are allowed
to bring your own shelf.
Q9: Can a computer be used for data processing in question F?
A: Laptops and desktops are not allowed, but other types are not limited.
Q10: "Only sound wave signals propagating inside the flat board material can be used, and other types of sensors cannot be used." Does the type that cannot be used include piezoelectric sensors?
A: Only acoustic sensors can be used to detect sound signals inside the flat board.
Q11: For question F, the frequency range is 15kHz~20kHz, the step frequency is 1kHz, and the sweep period is 5 seconds. Question: Is it 5 seconds for one step? Or is it 5 seconds for 15kHz~20kHz in total?
A: A total of 5 seconds.
Q12: What is the line width of the thick red frame line in area M?
A: The line width can be used to distinguish the grid, and there is no limit on the thickness.
Q13: Can a microphone be used as the receiving sensor?
A: Determine the type of receiving sensor based on your own system.
Q14: Can only red and black lines be drawn on the acrylic board to divide the grid? Can ABC and coordinate values be marked?
A: According to the requirements of the question.
G: Air-ground collaborative intelligent fire fighting system
1, G question supplementary instructions: The diameter of the luminous part of the simulated fire source is not more than 2cm. Note 2, (7), the length and width projection size is not more than 25cm35cm.
Q2: Can G question be started with a computer?
A: There must be no PC in the G question.
Q3: During the evaluation, is the simulated fire source lit randomly, or multiple?
A: During the evaluation, the simulated fire sources are placed in three areas according to the instructions of the judges, and then one fire source is lit according to the instructions of the judges.
Q4: What are the position and size parameters of the white blocks in the map of G question? Is the position fixed on the canvas, or is it covered with white cloth in the later stage?
Answer: The position and size of the white blocks in the map in question G are judged according to the provided graphics, and the error is no more than 10cm. It is realized by color spraying.
5 Questions: Does the four-wheel electric car have four driving wheels or can it be a combination of two driving wheels and two driven wheels?
Answer: The question is very clear, no reply.
6 Questions: The first question of the performance part: Does the drone take off from the car?
Answer: The instructions clearly state that the red area is the take-off and landing point
of the drone. 7 Questions: Is the acrylic plate carried on the car counted as the projection area of the car?
Answer: The instructions are very clear.
8 Questions: The size of the electric car mentioned in the pre-match preparation does not exceed 250×350, and the competition question requires no more than 200×350. Can the car prepared by the students according to the pre-match preparation requirements meet the rules?
Answer: The length and width projection size is no more than 25cm35cm.
9 Questions: Are there detailed requirements for the drone blades to be fully protected? Is it okay to only protect the outer side of the blades, or must it be fully covered?
A: At least the blades are fully protected.
Q10: Can the omnidirectional wheels be used to assist the encoder in positioning in question G?
Q11: Can the personal computer in question G be sealed and packaged with the work and submitted for competition?
A: There must be no PC in the work of question G.
Q12: In the schematic diagram of the drone site, the size and position of the white area and the width of the light blue line are not given. We need to make a map and would like to know.
A: The answer has been given.
Q13: Is there a difference between "pressing the button on the fire truck to start the drone" in the basic question and "starting the drone patrol on the fire truck" in the play question? Does starting mean taking off or starting patrol? What is the difference between the requirements and instructions "The drone can be placed at the take-off and landing point and manually started with one button to take off"? The question mentions that starting devices other than drones can be used. Does the button start on the fire truck belong to the starting device? Can devices other than the fire truck button be used?
A: There is no difference, understand it according to the meaning of the question.
Q14: In question G, are there any requirements for the display screen for the fire truck to "display the cruise path"? Please tell me, "During patrol, the fire truck display shows the patrol track curve." Does the curve mean to directly display the complete path planned in advance, or to show the path that the aircraft flies in real time?
Answer: It shows the track of the drone.
Q15: What are the requirements for the size of the block, the placement position, the width and color of the white block edge line?
Answer: The border is black, about 1cm.
Q16: Does the handheld laser and the vehicle-mounted laser mean the same appearance or the same light spot?
Answer: Understand it yourself.
Q17: The vehicle-mounted laser is controlled by current. Can the handheld test laser be controlled by the laser's built-in button?
Answer: Understand it yourself.
Q18: In question G, can the omnidirectional wheel be used to assist the encoder in positioning?
Answer: The question description requires that the Mecanum wheel cannot be used.
Q19: In the description of question G, the black ** area in the lower left corner is the take-off and landing location of the drone, and the red ** area is the parking location of the fire truck. These two locations are different, but the task requires that the drone patrol be started on the fire truck and return to the take-off point after the patrol is completed. The same location is required, which is a conflict. Is the take-off and landing location of this drone the black ** area or on the fire truck?
Answer: Understand it according to the text of the question.
Question 20: Can I use a drone with 8 coaxial motors for this year’s G question?
Answer: Understand according to the meaning of the question.
Question 21: Is there a range limit on the diameter of the projection of the trumpet-shaped hood simulating the fire source on the ground? That is, is there a maximum radial size limit?
Answer: The luminous part is 2cm, the angle of the hood is 60°, and the height is 10cm. It only needs to meet these conditions.
Question 22: Question G, in the basic requirements, is the fire turned on and off by pressing a button or a laser pen? Can a fire be controlled at random? Must the takeoff be controlled by a button or can it be controlled by a remote control? Will the remote control be given to the expert at that time?
Answer: The answer has been given before.
Question 23: In Question G, is the location of the block fixed?
Answer: The answer has been given before
. Question 24: In Question G, does the full coverage patrol cover the entire map or only six buildings need to be scanned? Do the basic requirements and the development part have to be completed in one time? Are the three fire sources fixed ?
Answer: Read the question carefully.
Question 25: Question G clearly states that Mecanum wheels cannot be used, so can an omnidirectional wheel solution be used? Are there any requirements for the signal frequency of the communication between the drone and the fire truck?
Answer: Judge by yourself according to the question.
Q26: Basic requirement 2 of question G requires that the drone take-off be started by pressing a button on the fire truck. However, the requirements for drones and fire trucks mention that "if a start or emergency stop operating device other than a drone is used, the device must be handed over to the staff after one-button start and take-off". Does that mean that it is also possible to not set a start button on the fire truck and directly start it through an external remote control and then hand the remote control to the staff?
A: This is an explanation for emergency handling of loss of control, and the requirements of the question should be the main focus. Press the button on the fire truck to take off.
Q27: What is the width of the blue line in question G?
A: 1mm for thin lines and 2mm for thick lines.
Q28: The drone take-off in the basic part and the development part of question G requires pressing the button on the fire truck to start. The requirements later also state that if a start device other than a drone is used, it must be handed over to the staff after take-off. If a remote control is used to take off with one button, does it still meet the requirements of the question to press the button on the fire truck to start?
A: The same as the previous question.
Q29: Can the drone be started with a safety rope with one button?
A: No.
Q30: In question G, fire trucks cannot run over blocks and boundaries. Does it refer to the wheels or the body?
A: Understand it yourself.
31 Question: The question allows the use of UWB, and base stations need to be deployed on site. Can other schools outside the assessment school be evaluated? UWB can be deployed on site in advance and debugged on site.
Answer: Deployed during the test preparation time.
32 Question: In question G, base station positioning, can the three groups use the same positioning base station system?
Answer: Yes.
33 Question: In question G, can the display device on the car use a personal computer, that is, the personal computer acts as a display device and is placed on the car?
Answer: No.
34 Question: Question G: Does the luminous part refer to the size of the lamp beads, or does it include the size of the lampshade?
Answer: The part that emits red light can be seen.
35 Question: In the map, except for the outer border thick line, there is no clear requirement for the line width of the other thin lines and sub-thick lines. How much should the unmarked line width be?
Answer: The blue line width has been answered before.
36 Question: Are there thin solid lines on the x-axis and y-axis of the fire protection area, and how thick are the lines?
Answer: Just a hint.
37 Question: Are there any color and size requirements for the light shield of the light source?
Answer: There is no limit on color, and the size is determined according to the requirements.
Q38: Is a cart with bull's-eye wheels considered a four-wheeled cart?
A: I don't know what bull's-eye wheels are, so make your own judgment based on the requirements and instructions of the question.
Q39: What are the three star-shaped wheels in the area diagram of question G?
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