Vehicle detector for parking-lot barrier gate

Abstract

The invention relates to a vehicle detector for a parking-lot barrier gate. The vehicle detector comprises a power module, a microprocessor module, an output control module and a three-axis magnetoresistive sensor module. The three-axis magnetoresistive sensor module and the output control module are respectively connected with the microprocessor module. The power module is respectively connected with the microprocessor module, the output control module and the three-axis magnetoresistive sensor module, and provides required voltage and currents to the microprocessor module, the output control module and the three-axis magnetoresistive sensor module. The three-axis magnetoresistive sensor module is used for sensing geomagnetic variations caused by passing vehicles, converting the variations into electric signals, and transmitting the electric signals to the microprocessor module. The microprocessor module is used for calculating and judging the received electric signals, and sending judgment results to the output control module. The output control module is connected with the parking-lot barrier gate and controls actions of the parking-lot barrier gate. According to the vehicle detector, the three-axis magnetoresistive sensor module is used for sensing the geomagnetic variations caused by the passing vehicles, the passing vehicles are judged through a geomagnetic detection technique, and therefore detection accuracy of the vehicles can be improved greatly.

Description

technical field [0001] The invention relates to parking lot barricade equipment, in particular to a vehicle detector used for parking lot barricades. Background technique [0002] Nowadays, in the traffic field, especially in the parking lot barrier, a large number of vehicle detectors are used to detect the vehicles entering and exiting. [0003] Common vehicle detectors use toroidal coils, which have the following disadvantages: [0004] 1. Poor accuracy. The sensing direction is single-axis sensing, and the amount of information contained in the vehicle detection is small, so it is impossible to conduct all-round detection of vehicles passing through the lane; when different models, vehicle bodies, and vehicle speeds pass above it, the accuracy of detection will be different The impact can be manifested in the vehicle detector's multiple judgments and missed judgments on the vehicle, resulting in the inability of the ticket machine at the entrance and exit of the parkin...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of poor accuracy of the above-mentioned annular coil type vehicle detector, and provides a high-accuracy vehicle detector for parking lot barriers

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