A Dynamic Vehicle Detection Method Based on Weak Magnetic Sensor
A weak magnetic sensor and vehicle detection technology, which is applied in traffic control systems, instruments, and traffic control systems of road vehicles, can solve the problems of dust or suspended particles, low detection accuracy, and high false detection rate
Inactive Publication Date: 2017-07-07
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology
This kind of detector has the advantages of convenient installation, quick response, clear outline, etc. Its disadvantages are that it is easily affected by road environment and weather conditions, as well as dust or suspended particles in the atmosphere, the detection accuracy is low, and the false detection rate is high.
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[0017] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0018] The invention provides a dynamic vehicle detection method based on a magnetic field weakening sensor. The method obtains an adaptive floating baseline according to the magnetic field weakening disturbance data of the environment where the magnetic field weakening sensor is located, and obtains the current vehicle by analyzing the disturbance data during the detection process. traffic data. The specific detection steps are as follows: figure 2 Shown:
[0019] Step 1, such as figure 1 As shown, since the magnetic field weakening sensor detects the magnetic field relatively quickly, the present invention uses a three-axis magnetic field weakening sensor as a magnetic field weakening acquisition unit to collect traffic flow. The magnetic field weakening acquisition unit collects the magnetic field data of the current environment in real time, and tr...
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The invention discloses a dynamic vehicle detection method based on a magnetic field weakening sensor. The invention obtains an adaptive floating baseline based on the magnetic field disturbance data of the environment where the magnetic field sensor is located. During the detection process, if the magnetic field disturbance data continues to exceed the threshold in the only two timing statistics, it is judged as an abnormal environmental disturbance. Update the baseline, complete the self-calibration, so that it can enter the normal vehicle detection process again. For the detectors that have entered the normal operation process, it can count the traffic flow of normal passing vehicles on the lane. The detector can enter the normal working state without external intervention, and can perform self-recovery when the environmental magnetic field data is abnormal, and has long-term road use requirements. The detection method has high accuracy and reliable anti-interference ability.
Description
technical field [0001] The invention relates to the fields of geomagnetic detection and traffic flow detection, in particular to a dynamic vehicle detection method based on a magnetic field weakening sensor. Background technique [0002] According to ITS statistics, currently commonly used traffic flow detection technologies mainly include loop coils, image recognition, and infrared detection. [0003] The working principle of the toroidal coil is that when the vehicle passes through the buried toroidal coil, the electromagnetic induction of the coil changes, which triggers the electronic components to send out pulses. The system can detect whether there is a vehicle passing through by counting the pulses. Its advantage is that Its own cost is very low, and its detection accuracy is high, but its service life is very short, its replacement is very cumbersome, and its maintenance cost is high. This method of use is currently being phased out. [0004] Image recognition main...
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IPC IPC(8): G08G1/042
CPCG08G1/042
Inventor 李华文李坤刘洁裴华刚刘大兴
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP