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Automobile speed measurement and control method and system

A measurement method and automobile technology, applied in the direction of average speed measurement, speed/acceleration/shock measurement, devices using electric/magnetic methods, etc., which can solve problems such as driving accidents, low accuracy of vehicle speed, and reduced control accuracy

Inactive Publication Date: 2015-05-27
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the vehicle speed measurement device in the prior art adopts the output shaft speed of the gearbox to convert the vehicle speed, and the vehicle speed accuracy is not high when the vehicle turns, which leads to the decrease of the control accuracy and easily causes driving accidents, and provides a real-time Vehicle speed measurement and control method and system for accurately measuring the speed of the vehicle when turning and effectively controlling the vehicle

Method used

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  • Automobile speed measurement and control method and system
  • Automobile speed measurement and control method and system

Examples

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Embodiment 1

[0044] in such as figure 1 In the shown embodiment 1, a vehicle speed measurement and control system includes a vehicle speed controller 1, a wheel deflection measuring instrument 2 installed on the two front wheels of the vehicle, a gravity sensor 3 installed on the four wheel axles, Wheel speed gauges on both front wheels of a car4. The wheel deflection measuring instrument is installed on the left front wheel and the right front wheel of the car respectively, and is used to measure the deflection angle θ of the left front wheel during the turning process of the car 1 and the deflection angle θ of the right front wheel 2 Size; the wheel speed measuring instrument is installed on the left front wheel and the right front wheel of the car respectively, and is used to measure the real-time speed v of the left front wheel of the car 1 and the real-time speed v of the right front wheel 2 , There are four gravity sensors, which are installed on the four wheel axles respectively,...

Embodiment 2

[0073] In embodiment 2, the vehicle speed measurement and control system also includes an alarm 5 (see figure 2 ), the alarm is connected to the vehicle speed controller, the alarm includes a sound alarm and a light alarm, the sound alarm is installed in the cab, and the light alarm is installed on the instrument panel.

[0074] In Example 2, when the vehicle speed v G When ≥8m / s, calculate the ratio K of the maximum value of gravity and the minimum value of gravity among the four gravity sensors, that is, K=F max / F min , when 10>K≥5 or |v G1 -v G2 | / v G When ≥0.1, the vehicle speed controller gives an alarm through the alarm, and the rest are the same as in Embodiment 1.

[0075] The invention measures the speed and deflection angle of the two front wheels in real time, and simultaneously determines the center of gravity G of the car according to the values ​​of the four gravity sensors, the wheelbase L and the wheelbase B of the car, and adjusts the left and right fro...

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Abstract

The invention discloses an automobile speed measurement and control method and system. According to the method, the speeds and deflection angles of two front wheels are measured in real time, meanwhile, the gravity center of an automobile is determined according to values of gravity sensors at four axles as well as the wheel base and the tread of the automobile, the moving speeds, around an instantaneous center during turning of the automobile, of the left front wheel and the right front wheel of the automobile are converted into the moving speeds in the gravity center position of the automobile respectively, the average value of the two automobile speeds in the gravity center position of the automobile is taken as the actual travel speed during turning of the automobile, and the automobile speed can be controlled simultaneously according to the stress conditions of the four wheels. The problems that the control accuracy is reduced and a travel accident is likely to cause due to the fact that the automobile speed accuracy is not high during turning of the automobile because an automobile speed measurement device adopts the rotation speed of a transmission output shaft for automobile speed conversion in the prior art are solved, and high practical value is realized.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to an automobile speed measurement and control method and system capable of effectively measuring and controlling the speed of the automobile when turning. Background technique [0002] Automobiles in the prior art are mainly converted into vehicle speed by measuring the rotational speed of the output shaft of the transmission, but the rotational speed of the output shaft of the transmission represents the speed of the vehicle wheels. The moving speed is consistent, but when the car is turning, the overall trajectory of the car is not consistent with the trajectory of the driving wheels of the car, so there is an error in using the wheel speed of the car to replace the overall speed of the car. With the continuous improvement of the intelligence level of modern automobiles, the requirements for the accuracy of various parameters of automobiles are also getting higher and higher, es...

Claims

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Application Information

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IPC IPC(8): G01P11/00
CPCG01P11/00G01P3/56B60W40/105B60W40/109B60W50/14B60W2050/143
Inventor 刘富豪张海涛田新利
Owner YANCHENG INST OF TECH
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