Magnetic positioning method of traffic vehicle based on displacement cyclic unique code

A magnetic positioning, the only technology, applied in the field of vehicle magnetic positioning, can solve the problems of difficulty in locating objects, increased system complexity, weather conditions, inapplicability, etc.

Inactive Publication Date: 2010-10-20
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Machine vision positioning has the problems of poor real-time performance and severe weather conditions in practical applications;
[0008] The defect of the ultrasonic positioning system is that when there are more than two positioning objects in the positioning space, the base station needs to distinguish th

Method used

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  • Magnetic positioning method of traffic vehicle based on displacement cyclic unique code
  • Magnetic positioning method of traffic vehicle based on displacement cyclic unique code
  • Magnetic positioning method of traffic vehicle based on displacement cyclic unique code

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Embodiment Construction

[0047] Please refer to figure 1 , figure 2 , image 3 , the present invention is a traffic vehicle magnetic positioning method based on a shifted cyclic unique code. The definition of a shifted cyclic unique code is that between consecutive adjacent code groups, the last few digits of the previous code group are the first few digits of the next code group. bit, and the two code groups have only one bit different, such a coding method is called a shifted cyclic unique code in the present invention, and this coding method can guarantee the uniqueness of positioning.

[0048] The encoding method of the shifted unique cyclic code is shown in Table 1. According to the encoding method of the shifted cyclic unique code, the code sequence of the track nail laying is determined as: 0001001110101100.

[0049] Table 1 The encoding method of the shifted cyclic unique code

[0050]

[0051] The method includes the following steps:

[0052]Step 1: Bury 16 track spikes at equal inter...

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Abstract

The invention discloses a magnetic positioning method of a traffic vehicle based on a displacement cyclic unique code, and the method comprises the following steps: 1. magnetic spikes are laid on a road at an equal interval according to rules of the displacement cyclic unique code; 2. the vehicle is provided with a vehicle-borne magnetic sensor and a sensor acquisition card; 3. the data acquired by the sensor acquisition card is detected by a vehicle control unit in real time; 4. whether the vehicle is in a magnetic spike positioning region or not is judged; 5. whether the quantity of the magnetic spikes sensed by the vehicle-borne magnetic sensor is four or five is judged; 6. code values of four magnetic spikes are determined; 7. code values of five magnetic spikes are determined; and 8. the position of the vehicle is determined. The method can realize local positioning of the vehicle at a landmark point, is stable and reliable, does not need power supply and maintenance, is not easy to be fouled or covered, has long service life and is beyond the control of satellite signals of other countries.

Description

technical field [0001] The invention relates to a vehicle positioning method, in particular to a vehicle magnetic positioning method. Background technique [0002] At present, there are many vehicle positioning methods, mainly including GPS global positioning, laser measurement positioning, optical positioning, inertial navigation positioning, machine vision positioning and ultrasonic positioning. [0003] The GPS global positioning system is controlled by a foreign country; [0004] The guidance and positioning accuracy of the laser measurement and positioning technology is high, but the installation process of the sensor and the launch device is complicated, and the position calculation is also complicated, and the precise position of the sensor system can be given in real time only if there is a cooperative target; [0005] Optical measurement and positioning When there are interfering light sources outside, it is easy to produce wrong positioning results, and it cannot ...

Claims

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Application Information

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IPC IPC(8): G01V3/165
Inventor 张春雨蔡蕾刘清彬仲崇波李斌蔡胜昔王琪吴涛
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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