Compact multimode vehicle detector

Abstract

The invention discloses a simplified multi-mode vehicle detector which comprises a microprocessor, a geomagnetic sensor chip, an operational amplifier, a radar ranging module, a power supply unit, a microwave radio frequency communicator, a matched transceiving antenna of the microwave radio frequency communicator and a visible light auxiliary detection circuit. An output signal of the geomagneticsensor chip is amplified by the operational amplifier and then is input to a geomagnetic signal input end of the microprocessor; the microprocessor is connected with the radar ranging module througha ranging interface end, is connected with the microwave radio frequency communicator through a communication end, is connected with the power supply unit through a control output end to ensure power-saving work of related parts, and is connected with the visible light auxiliary detection circuit through a light detection interface end. According to the invention, a unique grading progressive strategy is adopted to detect vehicles; in most cases, calculation is carried out by geomagnetic and / or visible light data acquired by ultra-low power consumption; the detection result with high confidence can be output without additionally starting a radar ranging module with high power consumption, the detection accuracy is considered, the product battery replacement and scrapping speed is greatly reduced, the product is flexible, economical and practical, a large amount of manpower and material resource operation and maintenance investment can be saved, and the method is suitable for various intelligent traffic applications.

Description

technical field [0001] The invention relates to a vehicle detector in the field of intelligent transportation, in particular to a multi-mode vehicle detector with simplified structure and high performance. Background technique [0002] At present, there is a serious imbalance in the supply of parking spaces in large, medium and small cities in China, the uneven use of parking spaces, the lack of an effective sharing mechanism, the "island" of parking lots and parking space information, and the difficulty of parking management. The installation and use of vehicle detectors (or parking space detectors) for information-based unified management of berths has become an effective means of urban traffic control in many places. Vehicle detectors are mainly used for analysis and judgment, and multi-mode detection products (geomagnetism combined with infrared, ultrasonic or radar, etc.) are gradually being valued and accepted by customers. Generally speaking, existing solutions or pro...

AI Technical Summary

Problems solved by technology

[0002] At present, there is a serious imbalance in the supply of parking spaces in large, medium and small cities in China, the uneven use of parking spaces, the lack of an effective sharing mechanism, the "island" of parking lots and parking space information, and the difficulty of parking management.

The installation and use of vehicle detectors (or parking space detectors) for information-based unified management of berths has become an effective means of urban traffic control in many places. Vehicle detectors are mainly used for analysis and judgment, and multi-mode detection products (geomagnetism combined with infrared, ultrasonic or radar, etc.) are gradually being valued and accepted by customers. Generally speaking, existing solutions or products have relatively prominent shortcomings in the following aspects Problems that need to be improved and solved urgently: 1. The technical solution disclosed in the existing invention patent "A Vehicle Detector Based on TMR Technology" (authorized announcement number: CN 203084928 U) has a significant effect of prolonging the life of the device by using the solar charging mechanism, but its The price is that more than half of the panel position must be reserved for placing solar panels and related components, which is enough space for single-mode geomagnetic detection products, but after years of practice, it is found that the detection accuracy of single-mode geomagnetic field is not high enough in operation. Using multi-mode detection methods to further improve detection performance has become an inevitable choice, coupled with the large-scale promotion and application of third-party Internet of Things technologies such as NB-IOT, both need to allocate a certain amount of panel space. In the case that there are restrictions and cannot be arbitrarily enlarged, the serious shortage of panel space has become a bottleneck factor restricting product upgrading; 2. The existing invention patent "Geomagnetic Vehicle Detector and Geomagnetic Vehicle Detection System" (authorized announcement number: CN 207020822 U) discloses a technical solution that uses regular scanning and collects magnetic field values ​​in a specific direction, and starts collecting magnetic field values ​​in other directions when the value reaches a preset value to achieve the goal of reducing power consumption. Relatively standardized vehicles have good detection and power saving effects, but for vehicles that do not comply with parking regulations and parked indiscriminately or electric vehicles with only weak magnetic field fluctuations, the missed detection is more prominent and needs to be improved; 3. At present, the multi-mode detection products and solutions that have been disclosed in the industry, the judgment of whether there is a car or not is generally based on the unified analysis, comparison and calculation of multi-sensor data. However, it is also prone to side effects such as frequent unnecessary loss of battery energy, accelerated product battery replacement or even scrapping

It can be seen from the above that there is a lot of room for optimization and improvement in the two core issues of power consumption control and detection accuracy in existing products

Images