Nowadays, many parking lots have started to apply the wireless vehicle detector monitoring system. What is the management scheme of the wireless geomagnetic vehicle detector in the parking lot? The following geomagnetic detector is described in detail below:
First, the system application
The parking lot management system is a set of parking lot vehicle access, on-site traffic guidance, parking space status information, and parking collection through cloud computers, network data transmission equipment, wireless geomagnetic detectors, data receiving processors, and customer terminal equipment. A comprehensive information platform for management, such as fees. It uses the wireless geomagnetic vehicle detector as the parking space state acquisition device, real-time detection of the state of the parking space, obtaining real-time parking space status information, processing through specific data links and cloud computers, and finally using the intersection display, terminal computer or The mobile phone APP and other forms make dynamic information release to the vehicle management department and the owner of the vehicle, and use the corresponding charging system management software to effectively supervise the parking fee charged by the parking lot.
Second, the working principle of geomagnetic sensor
The geomagnetic sensor uses the disturbance of the vehicle’s magnetic field to determine whether the motor vehicle exists or passes. In the absence of a motor vehicle, the Earth’s magnetic field is relatively stable. When the motor vehicle passes, the earth’s magnetic field will change regularly. The change will be recorded and analyzed by the geomagnetic detector, and the state of the parking space will be obtained through a specific algorithm. The wireless geomagnetic vehicle detector is embedded in the surface and is powered by the built-in battery. The information required for the operation interaction (vehicle status, sensor number, communication frequency parameter, power information, vehicle speed, etc.) is wirelessly installed and installed. The roadside wireless receiver or repeater performs two-way communication, and then the wireless receiver transmits the vehicle information to the DTU network transmission device, and finally the data is sent to the cloud computer. The cloud computer records and systematically analyzes the data transmitted by hundreds of sensors, and transmits it to the terminal equipment and personnel who need to use the data.
Third, the sensor characteristics
In summary, the entire management system consists of four parts, data acquisition unit, data link, cloud processing, terminal and object; the latter three parts are quantified under the existing common stable technical framework. The data processing, and the beautification of the interface, it is relatively easier to achieve stability and achievability; the first part is a process from phenomenon to quantification, there will be more uncertainties in the interference, how to reduce interference The impact of factors, giving accurate results is the key to information collection, but also the key to determining the efficiency of the entire system.
Therefore, in order to achieve the accuracy of the parking lot management system, it is necessary to have a high-precision wireless geomagnetic detector at the front end. The wireless geomagnetic detector is a key detection part. The advantages of the wireless geomagnetic detector of Shanghai Desheng are as follows:
- High precision: The magnetic field of the earth is basically constant within a few kilometers. The ferromagnetic object will have a huge disturbance to the earth’s magnetic field. The wireless geomagnetic sensor can distinguish the change of the earth’s magnetic field by 6,000, and when the vehicle passes The influence on geomagnetism will reach a fraction of the geomagnetism, so the geomagnetic sensor is used to detect the vehicle with extremely high sensitivity.
At the same time, through the accumulation of experience in the field case, a better performance acquisition algorithm is developed, which greatly improves the accuracy of the sensor.
2, installation, maintenance is convenient, no need to excavate construction, damage to the road surface is small, just need to make a small hole with a diameter of 5cm.
- The wireless geomagnetic sensor is detected by the change of the earth’s magnetic field when the ferromagnetic object passes, and is not affected by the weather.
4, high reliability, industrial working temperature -40 ° C ~ 85 ° C, the protection level meets the requirements of national standard GB4208-2008 IP68.
- High anti-interference: The signal transmission adopts FSK modulation mode. There is no special requirement for various interference sources on the site. The free 433M band does not need to apply and pay, and the corresponding power amplification processing is performed on the input and output carrier frequency signals to make the transmission distance. Farther (transmission radius >100M).
6, ultra low power consumption: battery life > 5 years, convenient system integration and maintenance
Fourth, the maintenance of the sensor
There are two main factors affecting the normal operation of the sensor. One is the wireless signal, and the other is the earth’s magnetic field. After the equipment is installed and operated, the surrounding environment may change, which may cause the wireless signal to be blocked, thereby reducing the reliability of communication, or Interruption; may also cause the local earth magnetic field to change the edge, which has a certain impact on the normal operation of the sensor; therefore, maintenance personnel are required to patrol and maintain the site.
Only the use of high-precision wireless geomagnetic detectors can make the parking guidance system perfect, otherwise the perfect back-end system is just a display.
M&T Technology is a professional equipment supplier and solution service provider in the field of smart parking in China. Products cover dynamic flow detection, static parking space detection, cloud smart parking space control system and so on. The main products include wireless geomagnetic vehicle detector, NB-IoT geomagnetic parking position detector, ultrasonic parking position detector, shared parking lock, intelligent parking lock, etc., which are widely used in urban road traffic statistics, roadside parking systems, shared parking and other fields. The Mb wireless geomagnetic parking position detector adopts dual-mode detection technology, and the precision is leading in the industry. Especially the complex application scenarios can reduce the false positive rate by 99.9%. The shared parking lock is based on the cloud platform technology architecture system design, which can realize people and vehicles. The parking space and the parking lot operator are perfectly interactive. The user can remotely realize the monitoring, management, authorized use and settlement of the parking space remotely anytime and anywhere through the cloud platform or app, and promote the development of unattended and shared parking. trend.