Transportation innovation! Unmanned smart parking will completely subvert the traditional parking mode

In modern cities, traffic accessibility and transportation efficiency are important indicators for measuring the level of urban operations. Regarding transportation innovation, the three major smart cities of Vienna, Austria, Barcelona, ​​Spain, and Tokyo, Japan are typical representatives.

Recently, Mercer Consulting announced the top 10 cities with the highest quality of life in the world in 2019. Vienna has become the world's most livable city for the tenth consecutive time. In addition to the healthcare system, cafes and rich cultural life that attract tourists, the city's smart public transportation system allows tourists to easily browse every corner of the city. Vienna has 5 subway lines, 28 tram lines and 128 bus lines. Residents can easily obtain real-time information on various means of transportation through the smartphone application Quando, which will also remind users before the next tram, subway or bus departure. In addition, users can also plan travel services through WienMobil. Whether it is public transportation, walking, cycling, taking a taxi or sharing a car, users can easily book and pay through the APP. Smart travel is making this city strive to become smarter, more humane, more sustainable and even more livable.

    Barcelona is a city with more than 5 million residents. In recent years, it has received nearly 9 million tourists. The subway system carries more than 390 million trips each year. The intelligent transportation system has become the basis for the smooth operation of the city. In addition to efficient public transportation, Barcelona also has an intelligent traffic light network, and Barcelona has implemented a variety of intelligent transportation solutions, including interactive touch screen information displays at bus stops, smart parking sensors that allow drivers to find nearby free parking spaces, bicycle sharing system Bicing and shared electric scooter rentals.

Tokyo, Japan, is one of the most densely populated megacities in the world, with more than 13 million residents. The city also receives many tourists from all over the world every year. However, under such heavy traffic pressure, the efficiency and ease of use of its transportation system have been widely praised. This is thanks to the Internet of Things technology. With the help of the Internet of Things technology, subway operators can collect and analyze data on equipment status in real time, identify defects, predict failures, and arrange maintenance. This "condition maintenance" method transforms the inefficient regular maintenance system into an intelligent maintenance system.

    As the urban population increases and the city size continues to grow, how to build an efficient, comfortable and fast transportation system has become a major challenge facing urban management agencies. In recent years, the cost of sensors has continued to decline, the communication speed has continued to increase, and more data has been collected and analyzed in real time. The Internet of Things is changing the management and operation of urban transportation. The following is an ultrasonic sensor for parking lots .

Parking lots are an extremely important part of urban transportation infrastructure, but with so many vehicles in China, the limited number of parking lots has become in short supply. At present, most parking lots have unclear parking space instructions and unclear parking space usage, which makes car owners turn blindly in the parking lot. At this time, according to the continuous updating and iteration of current science and technology, more requirements are put forward for the construction of parking lots. In addition to the requirements for the number of parking spaces, parking lots are also required to have intelligent guidance and an intuitive display of parking space usage, which will be a very comfortable experience.

Recently, Chongqing China Zhigu·Technology Innovation Center launched the first oblique parking system, becoming the first oblique parking garage in the country. In the nearly 400 square meters of the garage, 24 parking spaces can be renovated to park 40 cars. Each parking rack is tilted at 32 degrees and neatly arranged in a straight line. The inclination angle of the parking rack is generally between 28 and 32 degrees, which can be adjusted according to the garages with different floor heights. At the same time, the oblique parking system will be linked with Chongqing's first AGV intelligent parking robot to create a truly intelligent unmanned garage.

It is understood that in this system, the plane oblique intelligent parking system is composed of a parking rack, a power system, a hydraulic system, an automated intelligent control system, a safety assistance system, etc. Each parking rack is equipped with 8 detectors and sensor probes, which can monitor the vehicle position in real time, and respond and prompt the surrounding environment, thereby assisting the vehicle to return to its position safely and avoiding various accidents that may occur during parking. Specifically, the plane oblique intelligent parking rack is equipped with 12 proximity switch sensing devices and 8 ranging radars, which can realize automatic parking, obstacle avoidance and other functions. In order for these applications to work properly, they need a reliable ultrasonic sensor to detect the position of the vehicle. For these types of applications, Gongcai.com recommends an ultrasonic ranging sensor module - HG-C40U.

The ultrasonic ranging module is a product used to measure distance. It sends and receives ultrasonic waves, using the time difference and the speed of sound propagation. The propagation speed of ultrasonic waves in the air is v. According to the time difference △t between the emission and the reception of the echo recorded by the timer, the distance S from the emission point to the obstacle can be calculated, that is: S=v·△t/2, thereby calculating the distance from the module to the obstacle in front.

Ultrasonic distance sensor module - HG-C40U is a module with a size of 50x22x25 (mm) and a Φ16 sensor. It can measure the maximum distance to obstacles of 3.5m (at 5V) and 5m (at 12V), with a resolution within 5mm. HG-C40U also has two input voltages: 5V and 12V. The factory default is set to 12V. In terms of communication, UART communication is used to send data. In UART trigger mode, if the start command is generated by UART, only data is sent, sending: #Mode|2 (change to external trigger mode), receiving: !Mode|2 -> !Data Set Complement. Signal output uses the communication from sensor to PC using the 'interface board' (RS232, power regulator) data display using the monitoring program on the PC (hyperterminal can be used), high-performance ASIC chip to ensure stable transmission and sensitive reception.