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Road vehicle detection system and method

A road vehicle and detection system technology, applied in the field of intelligent transportation, can solve problems such as increased use costs and large errors, and achieve the effect of improving detection accuracy

Inactive Publication Date: 2015-11-25
SHENZHEN SHENGSHENGYUAN IND
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Problems solved by technology

However, this universal method is not fully applicable to the current needs. On the one hand, due to the use of different chips and schemes to detect the same vehicle, and because it is under different conditions, there is no doubt that the error obtained by the detection is relatively large; On the other hand, since different detection chips are used to detect vehicles, the cost of use is increased.

Method used

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  • Road vehicle detection system and method

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Embodiment

[0106] see Figure 5 , is a schematic diagram of four magnetoresistive sensors detecting vehicles provided by the embodiment of the present invention. Using the above method, the driving direction of the vehicle can be correctly judged. The measurement results of different vehicle speeds are given in Table 1:

[0107] Table 1 - Measurement results of vehicle speed algorithm

[0108]

[0109] Please refer to Table 2 for the detection results of the vehicle length. It can be seen from Table 2 that the recognition range of the vehicle length is relatively wide, and the reason for the inaccurate vehicle speed detection algorithm is that the error range of the vehicle length is large, and the magnetic field signals of the vehicles are not consistent. It is related to the content of magnet substances in the car.

[0110] Table 2 - Car length measurement results

[0111]

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Abstract

The invention provides a road vehicle detection system and method. An acquisition module acquires a three-dimensional geomagnetic signal in real time, a filter module filters the three-dimensional geomagnetic signal, and a detection module calculates the difference between the filtered three-dimensional geomagnetic signal and a reference line data and judges a vehicle state according to an algorithm model and X, Y and Z-axis geomagnetic values, so that the vehicle detection precision is effectively improved, and the defect of inaccuracy when the vehicle state is only judged by means of a threshold is overcome; and according to the road vehicle detection system, on the basis of vehicle detection, the acquisition module is designed into a subnet composed of a magneto-resistive sensor node and a routing node, and the running time and speed of a vehicle are detected in real time according to the routing node, so that vehicle flow, speed and vehicle model can be detected.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a road vehicle detection system and method. Background technique [0002] With the rapid development of intelligent transportation systems, vehicle object detection has become an important part of modern intelligent transportation systems. Vehicle detection generally includes the detection of vehicle length, vehicle speed, vehicle type, and vehicle flow. It can be seen that the accuracy of vehicle detection directly affects the level of traffic management, and it is also a difficult point in current intelligent transportation research. [0003] At present, the detection of vehicle targets mainly adopts the vehicle detection method based on motion information, by using different technical solutions or different chips to detect the length of the vehicle, the speed of the vehicle, the type of the vehicle, and the detection of the vehicle flow. However, this unive...

Claims

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Application Information

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IPC IPC(8): G08G1/042G08G1/052G08G1/017G08G1/065
Inventor 傅晓亮何伟国
Owner SHENZHEN SHENGSHENGYUAN IND
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