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AMR-based double-terrestrial magnetism vehicle detection method and device

A vehicle detection and geomagnetic technology, applied in the field of communications, can solve problems such as low accuracy, inability to be used as a vehicle, signal indicator error message, etc.

Inactive Publication Date: 2017-03-22
杭州艾佳智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are problems with the detection methods in the prior art: there are requirements for parking the vehicle, and when the vehicle is not parked in place or parked across the border, it is easy to miss detection
The reason is that the amount of disturbance to the geomagnetic field by various parts of the vehicle is irregular, and there is a minimum value of the disturbance amount in some parts. Very high, the signal indicator light error message often occurs

Method used

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Embodiment 1

[0026] Such as figure 1 As shown, a kind of AMR-based dual-geomagnetic vehicle detection method of the present embodiment installs a master sensor and a slave sensor at the 1 / 3 position of the parking space;

[0027] The distance between the master sensor and the slave sensor is 1-1.5 meters;

[0028] The main sensor monitors the geomagnetic information and sends it to the processor;

[0029] The geomagnetic information monitored by the sensor is sent to the processor;

[0030] After processing the data, the processor sends the geomagnetic information 1 and geomagnetic information 2 to the controller;

[0031] The controller performs differential calculation on geomagnetic information 1 and geomagnetic information 2;

[0032] Comparing the calculation result with the preset threshold range;

[0033] If it is within the threshold range, there is a car entering the garage, and the controller sends a control signal to the alarm device;

[0034] If it is outside the threshold...

Embodiment 2

[0037] Such as figure 2 Shown: an AMR-based dual-geomagnetic vehicle detection device in this embodiment, the device includes a master sensor and a slave sensor for monitoring geomagnetic information at the 1 / 3 position of the parking space; A processor for denoising and amplifying the geomagnetic information sent by the processor; a controller for receiving the geomagnetic information sent by the processor, performing differential calculations, comparing the results with preset thresholds, and sending corresponding control signals to the alarm device; For the alarm device showing the idle or occupied situation of the parking space, the main sensor and the slave sensor are respectively electrically connected to the processor; the processor is electrically connected to the controller; the controller is electrically connected to the alarm device connect.

[0038] As an improvement of the technical solution of the present invention, the alarm device is a signal indicator light,...

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Abstract

The invention discloses an AMR-based double-terrestrial magnetism vehicle detection method and device. Two sensors are installed in positions of one third of a parking space, wherein one is a master sensor, and the other is a salve sensor. When a vehicle is parked in the parking space, the vehicle crosses the two sensors, and at this moment the difference principal of the master and slave sensors can be utilized to perform accurate judgment of the existence of the vehicle.

Description

technical field [0001] The invention relates to the communication field, in particular to an AMR-based dual-geomagnetism vehicle detection method and device. Background technique [0002] The principle of AMR-based geomagnetic vehicle detection is that the geomagnetic field can be divided into two parts: a stable magnetic field and a changing magnetic field. Among them, the stable magnetic field is the main part of the geomagnetic field, accounting for more than 99% of the total size of the geomagnetic field, and it is relatively stable within a certain range. When a stable magnetic field is approached by magnetically permeable materials such as iron, its inherent magnetic field lines will be changed, thereby changing the magnetic field strength. The existing vehicle detection algorithm mainly uses a single geomagnetic vehicle detector installed under the parking space, and realizes the judgment of whether there is a car or no car by detecting the change of the magnetic fie...

Claims

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Application Information

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IPC IPC(8): G08G1/14
CPCG08G1/146
Inventor 汪红良
Owner 杭州艾佳智能科技有限公司
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