Method for correcting navigation mileage measurement signal of navigator

A technology of a navigator and a working method, which is applied to instruments, measuring devices, radio wave measuring systems, etc., can solve the problems of insufficient vehicle mileage accuracy, and achieve the effects of convenient input, timely safety, and avoiding interference.

Inactive Publication Date: 2012-08-29
CHANGZHOU SHINCO AUTOMOTIVE ELECTRONICS
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Problems solved by technology

[0003] The disadvantage of the above-mentioned prior art is that: the tire pressure of the wheel changes regularly, and the wheel tire is worn or replaced with a new tire, resulting in a change in the diameter of the wheel, which in turn makes the vehicle mileage obtained by the pulse counting method not accurate enough

Method used

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  • Method for correcting navigation mileage measurement signal of navigator
  • Method for correcting navigation mileage measurement signal of navigator

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Embodiment 1）

[0016] like figure 1 , the navigator of the present embodiment includes: a CPU unit, a memory connected to the CPU unit, a pulse counter connected to the CPU unit, a map database connected to the CPU unit, a sensor for sensing current vehicle displacement connected to the CPU unit The direction of the geomagnetic compass navigation module, and the GPS module connected to the CPU unit for obtaining GPS signals, and the pulse counter is used to sense the rotation of the wheel and output the number of pulses corresponding to the number of rotations of the wheel.

[0017] The working method of the above-mentioned navigator includes: the CPU unit periodically or through user control, records the pulse number output by the pulse counter on the road section that the current vehicle passes, and calculates the distance corresponding to a single pulse according to the length of the road section , and then update the distance corresponding to the single pulse prestored in the memory; whe...

Embodiment 2）

[0024] On the basis of embodiment 1, the working method of the navigator of the present embodiment has the following variants:

[0025] The navigator also includes a touch screen or a voice input module connected to the CPU unit; the length of the road section is obtained by the user of the current vehicle according to the indicated values ​​of the road milestones at the starting point and the end point of the road section, and the length of the road section is obtained by the current vehicle successively. When arriving at the start point and the end point of the road section, the user successively inputs through the touch screen or the voice input module.

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Abstract

The invention relates to a working method of a navigator, which is used for correcting a navigation mileage measurement signal. The adopted navigator comprises a central processing unit (CPU), a storage device, a pulse counter and a geomagnetic compass navigation module, wherein the pulse counter is used for inducting the rotation of wheels and outputting a pulse number which corresponds to the number of turns of the rotation of the wheels. The working method of the navigator comprises the following steps of: recording the pulse number output by the pulse counter by the CPU at regular intervals or through user control on a road section on which current vehicles run past, and working out the distance which corresponds to a single pulse according to the length of the road section; then, updating the distance which corresponds to the single pulse prestored in the storage device; and performing real-time path navigation through the pulse number acquired by the pulse counter in unit time, the distance which corresponds to the single pulse and the geomagnetic compass navigation module when the CPU judges that a global positioning system (GPS) signal does not exist currently or the GPS signal is invalid.

Description

technical field [0001] The invention relates to the technical field of the working method of the navigator, in particular to a method for correcting the odometer signal for navigation of the navigator. Background technique [0002] At present, when a vehicle equipped with a navigator (referred to as: the current vehicle) enters an area or a road section where the GPS signal is blocked (for example: a tunnel, a mountain path or a path between high-rise buildings in a city), the existing vehicle generally uses a The pulse counter on the wheel is used to obtain the number of rotations of the wheel within a certain period of time, and then obtain the mileage of the vehicle within this period of time, and at the same time combine the geomagnetic compass navigation module to implement navigation when the GPS signal is invalid. [0003] The disadvantage of the above-mentioned prior art is that: the tire pressure of the wheel changes regularly, and the wheel tire is worn or replaced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
Inventor 秦春达李晓华
Owner CHANGZHOU SHINCO AUTOMOTIVE ELECTRONICS
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