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Measuring method and device based on differential GPS for vehicle road test

A global positioning system and differential global positioning technology, applied in the direction of measuring devices, vehicle testing, machine/structural component testing, etc., can solve the problem of vehicle dynamics, measurement impact of formulation, inability to record displacement, expensive equipment, etc. problem, to achieve the effect of reducing the measurement workload, the measurement workload is small, and the measurement intensity is reduced

Inactive Publication Date: 2005-01-26
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

The existing pentameters can only record the distance, but not the displacement, and also have the following disadvantages:
[0004] 1. Due to the frictional resistance between the five-wheel instrument and the ground, it will affect the measurement of vehicle dynamics and formulation
Moreover, it is greatly affected by the condition of the road surface. In rainy days or on wet ground, there will be slipping and jumping in uneven places, resulting in measurement errors.
[0005] 2. At present, the tire five-wheel instrument has been gradually replaced by the optical five-wheel instrument, but the optical five-wheel instrument is also limited by the ground conditions, and the lens is easy to be polluted in the harsh environment, such as when there is dust and water on the road surface. Affect measurement accuracy
[0006] 3. At present, whether it is an optical pentameter or a millimeter wave pentameter, the equipment price is extremely expensive

Method used

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  • Measuring method and device based on differential GPS for vehicle road test
  • Measuring method and device based on differential GPS for vehicle road test
  • Measuring method and device based on differential GPS for vehicle road test

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Embodiment Construction

[0044] The vehicle road test measurement method based on the differential global positioning system proposed by the present invention comprises the following steps: at first the vehicle under test obtains the driving state parameters through the global positioning system; receives the positioning position signal of a certain set point in the test site by the global positioning system ; The tested vehicle receives the above position signal and compares it with the driving state parameters obtained by the global positioning system to obtain accurate vehicle driving state parameters.

[0045] In the above method, the vehicle driving parameters may be driving trajectory, driving distance and driving speed.

[0046] In the above method, the method for comparing the position parameter with the driving state parameter includes the following steps:

[0047] (1) Let the real geographic coordinates of the set point be (x bo ,y bo ,z bo ), empirically setting the estimated geographic ...

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Abstract

This invention relates to a measurement and apparatus for automobile road based on the difference of global positioning system and belongs to the field of observe and control. The vehicle to be measured is first to obtain driving state parameter through GPS; then to receive the positioning information signal of a designed point in the testing field from GPS; later to compare the signal with the state parameter to obtain the accurate driving state parameter of the vehicle. The apparatus comprises a signal-receiving circuit for driving state parameter and circuit for measuring errors from GPS of a designed point. The invention reduces the testing cost of vehicle and decreases experiment work amount and measuring intensity, and can replace other apparatus to accomplish complicated measuring test.

Description

technical field [0001] The invention relates to a vehicle road test measuring method based on a differential global positioning system and a device thereof, belonging to the technical field of vehicle testing. Background technique [0002] Automobile road test is a comprehensive experiment to measure the performance of various aspects of automobiles. It includes automobile steering return performance test, steady-state rotation test, steering portability test, steering transient response test (steering wheel angle pulse input), steering transient response test (steering wheel angle step input), serpentine test, Maximum speed test, minimum stable speed test, vehicle acceleration test, vehicle fuel consumption test (direct gear full throttle acceleration fuel consumption test, constant speed fuel consumption test, multi-working condition fuel consumption test, average use under limited conditions Fuel consumption test), road smoothness random input test, stop distance measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 连小珉张新丰皮得意
Owner TSINGHUA UNIV
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