ADI's smoke detector integrated solution based on ADPD188BI live data collection
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Live Q&A:
1. What is the accuracy of ADPD188BI? What are the factors affecting the detection?
A: The accuracy is determined by the entire system. The ADPD188BI can refer to ~0.1% obscuration/ft at 10uA avg. current, which can be set dynamically. Other factors need to be considered include maze design and backend algorithms.
2. I am engaged in gas sensing. Could you please tell me which band of infrared laser is used in this chip and what type of detector is used? Thank you
A: We use dual light sources, and the infrared uses the 850nm band. LED is used for transmission and PD is used for reception.
3. Another question: Can the concentration of gas be detected?
A: Hello. No. ADPD188BI optically detects scattered light from solid particles produced by combustion and cannot be used as a gas sensor.
4. What transmission protocol does the APD188BI smoke detector discussed in this article use?
A: Use SPI or I2C interface
5. Is this discussion only about the ADPD188BI model?
A: It mainly introduces the working principle of the ADPD188BI chip, and also introduces some relevant regulatory testing contents.
6. What is the concentration range that can be detected? Will there be false detection?
A: ADPD188BI uses dual wavelengths to distinguish particle sizes and reduce false alarm detection.
7. Hello! Does the ADPD188BI smoke detector have any requirements for detecting smoke particles? Can it detect open flames?
A: Hello. It can detect smoldering fire. The particles detected in fire are generally in the range of 100nm to several hundred nm. Interference such as water vapor is usually greater than 1um
8. Does this device support MOBUS protocol?
A: ADPD188BI is an optical module that needs to be connected to a controller. SPI or I2C is used between the controller and the controller. The controller can communicate via MODBUS
9. Hello, our company is engaged in smart buildings. We use Lora as the 485 communication module, and then display the extracted 485 data on the WEB page through the network. At present, we have done power detection module, water pressure, air quality, temperature and humidity, water level, flooding and other tests. The only thing missing is smoke detection. I would like to know if your company's smoke detector is also 485 output? Does it support MOBUS protocol?
A: Our ADPD188BI is mainly an analog front-end chip for smoke detection. The entire system also requires the use of a single-chip microcomputer, so you can choose the corresponding single-chip microcomputer product that can be supported according to your application requirements. For ADPD188BI, it is a standard I2C output, which is directly connected to the single-chip microcomputer for further data processing.
10. What are the advantages and characteristics of ADI's smoke sensors compared to other traditional smoke sensors or sensors of other brands?
A: ADPD188BI is a dual light source integrated solution with small size and high consistency. It complies with UL, EN and GB regulations.
11. What communication protocols are currently used?
A: Use SPI or I2C to communicate with the controller
12. What is the type of sensor? Infrared, electrochemical, or other?
A: It is a photoelectric type sensor with wavelengths of 470nm and 850nm
13. Does the ADPD188BI integrated solution include battery management?
A: ADPD188BI does not integrate battery management
14. How integrated is ADPD188BI? Does it have high requirements on PCB size?
A: The integration is very high, including LED, PD, AFE, etc. The package size is 3.8 x 5.0 mm. It can greatly reduce the PCB area.
15. What are the differences between ionization and photoelectric sensors? What are their advantages and disadvantages?
A: Ionization detectors: These detectors are very good for measuring small particles. However, in many parts of the world, there are concerns about the use of radioactive sources and the sources used to generate them. In addition, the technology often does not work well for slow burning or smoldering fires and sometimes has difficulty detecting large particles.
16. Some gas sensors need to be preheated before detection, so the power consumption is almost uncontrollable. How does ADPD188 solve this problem?
A: ADPD188BI detects scattered light from solid particles during combustion and is not a gas sensor.
17. Will the accuracy of ADPD188BI drift after long-term use? How to perform regular inspection and calibration?
A: Long-term use requires correction of dust accumulation.
18. What is the overall power consumption of the product using this solution?
A: Sensitivity is ~0.1% obscuration/ft, average power consumption is about 10uA
19. What are the advantages of identifying water vapor?
A: Use dual wavelengths to distinguish particle sizes and reduce the interference of water vapor
20. Isn’t it more dangerous when an ionization detector is detecting explosive gases? Isn’t it equivalent to a fire source itself?
A: Our solution is mainly based on the principle of photoelectric detection. Ionization detectors use a radioactive source, usually americium 241, to ionize particles in the air through radioactive decay.
21. Does power consumption allow real-time or periodic monitoring of the environment?
A: The power consumption is very low and real-time monitoring is possible
22. What is the package size of ADPD188BI?
A: 3.8 x 5.0 mm
23. What are the testing standards for the ADPD188BI smoke detector?
A: You can refer to the standards in the current UL, EN and GB regulations for smoke testing.
24. What does the output value of this chip mean? Does it refer to the AD value of the particle concentration in a certain space or something else?
A: The output result is the current received by the PD
25. Compared with discrete device solutions, what are the advantages? Is there a cost advantage?
A: Small size, low power consumption, good consistency, easy production
26. Is the smoke sensor easily interfered by some dust, for example, if the house is dirty?
A: Dust is a large particle interference, which can be distinguished by particle size. Long-term dust accumulation requires software correction.
27. What are the communication interfaces? Does IIC have one?
A: Yes I2C
28. Is there any related firmware driver?
A: Yes, we can provide driver code
29. Is there any special design to prevent false alarms?
A: It is mainly through chips, system recognition and algorithms that smoke information such as water vapor that is not caused by fire is separated.
30. Is the output result of ADPD188BI filtered data or raw data?
A: The mean filter is integrated internally and can be used
31. Does ADI provide chips or finished products?
A: Chip
32. Can the smoke alarm mentioned this time be connected to the fire protection system?
A: ADI's ADPD188BI is a smoke sensor analog front end. The entire smoke sensor product still needs to be completed by professional manufacturers. The performance of the smoke sensor product itself can pass UL, EN and GB regulations.
33. What is the difference between the ADPD188BI smoke detector integrated solution and ADI’s previous smoke detector solution?
A: Currently, there is only one solution for smoke detectors. Are you referring to other gas detection solutions?
34. What communication methods are supported?
A: ADPD188BI is an I2C data interface, connected to a microcontroller. You can choose a microcontroller product that supports the corresponding communication protocol according to your application requirements.
35. Is there any insect repellent protection?
A: Insect-proof nets need to be considered when designing a maze.
36. What is the concept of dual wavelength provided by ADI's ADPD188BI? What benefits can it bring?
A: Use two wavelengths, 470 nm and 850 nm, to measure the particle size.
37. What is the UL certification in the sensor field? Is there a corresponding standard in China?
A: UL is the US standard, and the domestic independent smoke detector standard corresponds to GB20517
38. Is the peripheral circuit of ADI's ADPD188BI complicated? Or is it a single-chip solution?
A: ADPD188BI is a front-end product that integrates dual light sources and ADC. It can be directly connected to a single-chip microcomputer. The circuit is simple.
39. Can smoke alarms also detect cigarettes?
A: Yes.
40. Is ADPD188B an optical module? Does it function like a maze?
A: It is an optical module, using a matching maze
41. What is the supply voltage of ADPD188BI?
A: 1.8V, 3.3V and 5.0V
42. Can VOC in the factory be detected?
A: Our current solution is smoke detection, and we cannot detect gas yet.
43. Where can I download the ADPD188BI data sheet?
A: You can download it through the link https://www.analog.com/en/products/adpd188bi.html
44. It is basically the same as TI’s solution.
A: ADPD188BI is a dual light source integrated solution.
45. Traditional mazes are all made of infrared tubes. What are the advantages of ADPD188B optical modules?
A: The design size can be reduced a lot
46. If the power supply is 1.8V, can I2C communication be directly connected to the 3.3V system?
A: Level conversion is required
47. What communication interface does the ADPD188BI smoke detector use?
A: Use SPI or I2C communication
48. Then this is very likely a false alarm.
A: For smoke sensors with a single light source, the false alarm rate is relatively high.
49. What is the principle of the ADPD188BI smoke detector? Does it have to be judged by light?
A: It is the photodetector principle. In this case, an LED emits light into the sampling container and the light scattered from the particles or smoke is detected on a photodiode.
50. Is there a related development board?
A: Yes, you can refer to the ADPD188BI homepage on the ADI official website to apply for an evaluation board. You can also apply through ADI authorized agents.
51. What is the power consumption of ADPD188BI? Thank you
A: Sensitivity ~0.1% obs/ft
52. What is the power consumption of ADPD188BI? Thank you
A: The average power consumption is about 10uA
53. Is it suitable for battery power supply? For example, 18650 battery
A: The power consumption is relatively low and can be powered by batteries
54. Compared with similar devices such as ADPD4000, what are the main features of ADPD188BI?
A: ADPD4000 is an AFE and does not integrate LEDs and PDs.
55. What is the operating temperature range of smoke detectors?
A: -40℃ to +85℃
56. In what fields is smoke detection mainly used?
A: Mainly used for fire alarm
57. Can the sensitivity be adjusted? Because some environments allow less smoke to be generated without alarm, such as limestone processing. But high concentration alarm is required.
A: The sensitivity is adjustable. For limestone dust, which is large in size, ADPD188BI can distinguish by particle size.
58. Through what interface does the ADPD188BI smoke detector communicate with the MCU?
A: Use SPI or I2C
59. What is the power consumption of this smoke sensor? Does it include the option of heating function? This part consumes a lot of power, which has an impact on low-power applications.
A: Photoelectric sensor, no heating function
60. Does ADI's ADPD188BI need to be used with a dedicated smoke sensor chip?
A: ADPD188BI is a photoelectric smoke detector chip with integrated dual light sources. I don’t know what specific dedicated smoke sensor chip you are referring to?
61. Compared with such highly integrated sensors, the requirements for MCU selection are much lower.
A: Yes.
62. What certifications has the ADPD188BI smoke detector passed? What other certifications do products need to pass when they are made in China?
A: If it is sold domestically, it needs to pass the national standard. If it is sold overseas, it needs to pass the European standard and the American standard.
63. How many packaging forms does ADPD188BI have and what is the minimum size?
A: A package with dimensions of 3.8 x 5.0 x 0.9 mm
64. How to identify dust and smoke?
A: They can be distinguished by particle size.
65. What is the operating temperature range of ADPD188BI?
A: -40℃ to +85℃
66. How to choose internal light source or external light source
A: There are three LED drivers, 2 LEDs are integrated internally. One driver is available for external use.
67. Is the smoke detection algorithm written by the user or is it already included in the chip?
A: The chip provides raw data, and users need to make judgments through algorithms.
68. Are there any non-smoke situations where false alarms are likely to occur? If so, how can we avoid them in the application?
A: Yes, for example, water vapor. Our dual light source solution can distinguish water vapor very well.
69. Can the accuracy of smoke detectors be programmed?
A: Yes, it can be configured
70. Is the smoke chamber ceiling compensation done by the end user himself?
A: Yes, compensation needs to be done in software
71. Where can I download the ADPD188BI manual?
A: You can download it from the following link: https://www.analog.com/en/products/adpd188bi.html
72. Can the sensitivity and accuracy be set by myself?
A: Yes, it can be flexibly configured
73. After batch production, is it easy to calibrate the smoke detector?
A: Factory calibration
74. Are there any sample application programs?
A: Yes
75. If the background drifts, how to correct it?
A: Background correction is required in the software.
76. How to solve the problem of dust falling on sensors that use the reverse smoke reflection detection method?
A: Software compensation is required
77. What is the working temperature?
A: Temperature range -40℃ to 85℃
78. Does the dual wavelength work intermittently?
A: Yes
79. Has the compensation of the smoke chamber been adjusted before leaving the factory?
A: Yes
80. Does reading data through I2C have anything to do with time slots?
A: The time slot is configurable, select enable or disable. Data can be read through registers or FIFO
81. How can you distinguish between water and smoke?
A: Differentiate particle size
82. What devices are integrated into ADI's ADPD188BI optical module and how reliable is it?
A: Please refer to the link https://www.analog.com/en/about-adi/quality-reliability/reliability-data/wafer-fabrication-data.html
83. Where to buy ADPD188BI
A: Please contact the distributor to purchase https://www.analog.com/cn/about-adi/landing-pages/002/sales-and-distributors.html
84. Where to buy
A: Please contact the distributor to purchase https://www.analog.com/cn/about-adi/landing-pages/002/sales-and-distributors.html
85. Does the evaluation version need to have a small box added to make a smoke chamber?
A: The evaluation board comes with a maze
86. Is the concentration sensitivity preset?
A: No, it needs to be determined in the software program.
87. How to effectively distinguish regular smoke (dust) from illegal smoke, is there a special algorithm built in? Is there an adaptive cal adjustment algorithm?
A: There is no built-in algorithm
88. Is there a CO gas concentration detection function?
A: No
89. What is the power consumption?
A: The average power consumption is about 10uA when the sensitivity is ~0.1% obs/ft
90. The power consumption of the smoke detection solution is very important. What is the average power consumption?
A: The average power consumption is about 10uA when the sensitivity is ~0.1% obs/ft
91. How are the two color detections produced in ADPD188BI?
A: Two types of LED
92. Is there a test board?
A: You can use the evaluation board to test
93. Is it periodic monitoring or real-time detection during operation?
A: It can be measured in real time
94. Is there any mature reference solution?
A: You can refer to the evaluation board for design.
95. Is there any demo for use?
A: You can refer to the evaluation board
96. Can it be powered by batteries?
A: Yes
97. Is it possible to distinguish between types of dust and smoke?
A: Yes
98. Can a smoke detector be powered by batteries?
A: Yes
99. In places with strict requirements, can users calibrate manually?
A: Yes
100. Can it be used in buildings?
A: Yes
101. In the design of a smokeless chamber, are there any structural considerations to achieve anti-glare at a faster response speed?
A: Integrated ambient light suppression
102. How does the photoelectric smoke detector receive the infrared light emitted by the infrared transmitting tube?
A: Integrated photodiode and TIA
103. Does dust affect its detection?
A: Dust accumulation will affect the measurement and requires software correction
104. Is the measurement affected by dust, etc.?
A: Dust accumulation will affect the measurement and requires software correction
105. Is the relationship between transmitted light and scattered light fixed?
A: It depends on the type of smoke.
106. What is the power consumption?
A: The power consumption is very low. The average power consumption is about 10uA when the sensitivity is ~0.1% obs/ft
107. What is the lowest power consumption of ADI's ADPD188BI?
A: Power consumption is related to pulse width, number of pulses, sampling rate, etc., and can be set flexibly.
108. Is the ADPD188BI smoke detector battery powered? What is the power consumption?
A: The power consumption is very low and can be powered by batteries. The average power consumption is about 10uA when the sensitivity is ~0.1% obs/ft
109. How is the power consumption?
A: The power consumption is very low, which depends on the setting. The average power consumption is about 10uA when the sensitivity is ~0.1% obs/ft
110. Will the steam from boiling water also trigger the alarm?
A: For general detectors, water vapor is one of the sources of false alarms. The ADPD188BI dual-wavelength measurement can resist water vapor interference.
111. Is ADPD188BI used in home or industrial fields?
A: Both can be used
112. Is there any way to compensate for the temperature drift and attenuation of the sensor over time?
A: The sensor does not integrate these compensations and needs to be completed by software
113. Is the measurement response fast? Does it need to be preheated? Thank you
A: No preheating required
114. What are the measures to prevent dust, insects, and external light interference?
A: It has integrated ambient light suppression, and insect prevention requires the use of an insect net
115. Is the calibration performed on the production line stored inside the IC? When applied, the PTR will increase. Do I need to calibrate again?
A: The calibration factor is saved. The reading is calibrated by the calibration factor.
116. Is the data collected through 485 or other methods?
A: SPI or I2C
117. What wavelengths are available?
A: 470 nm, 850 nm
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