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Vehicle speed measurement and control method and system

A technology of measurement and control system and measurement method, applied in the direction of average speed measurement, speed/acceleration/shock measurement, devices using electric/magnetic methods, etc., which can solve problems such as reduced control accuracy, low vehicle speed accuracy, and driving accidents , to achieve the effect of reducing system cost, high practical value, and ensuring driving safety

Inactive Publication Date: 2017-12-19
YANCHENG INST OF TECH
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  • 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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  • Vehicle speed measurement and control method and system
  • Vehicle speed measurement and control method and system

Examples

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Effect test

Embodiment 1

[0046] 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

[0076] 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.

[0077] 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.

[0078] 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 a vehicle speed measurement and control method and system. By measuring the speed and deflection angle of two front wheels in real time, and at the same time determining the center of gravity of the vehicle according to the values ​​of the gravity sensors at the four axles, the wheelbase and the wheelbase of the vehicle, the The moving speed of the left and right front wheels around the instantaneous center when the car is turning is converted into the moving speed at the center of gravity of the car respectively, and the average value of the two car speeds at the center of gravity of the car is taken as the actual driving speed when the car is turning. The speed of the vehicle can be controlled according to the stress on the four wheels. It effectively solves 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, resulting in reduced control accuracy and easy driving accidents, and has high practical value.

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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Patent Type & Authority Patents(China)
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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