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Automobile speed measuring device and automobile speed measuring and control method

A speed measuring device and automobile technology, applied in measuring devices, linear/angular velocity measurement, speed/acceleration/impact measurement, etc., can solve problems such as low speed accuracy, driving accidents, and reduced control accuracy, so as to avoid calculation difficulties, Effect of system cost reduction

Active Publication Date: 2015-07-08
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 device and vehicle speed measurement and control method for accurately measuring the speed of a vehicle when turning and effectively controlling the vehicle

Method used

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  • Automobile speed measuring device and automobile speed measuring and control method
  • Automobile speed measuring device and automobile speed measuring and control method
  • Automobile speed measuring device and automobile speed measuring and control method

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Embodiment 1

[0042] in such as figure 1 In shown embodiment 1, a kind of vehicle speed measuring device is installed on the four-wheeled vehicle, comprises vehicle speed controller 1, is installed on the two front wheels of automobile and is used for measuring the wheel deflection angle measuring instrument 2 of wheel deflection angle, is installed on The wheel speed measuring instrument 3 used to measure the wheel speed on the two front wheels of the car, the wheel deflection angle 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 of the left front wheel during the turning process of the car θ 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...

Embodiment 2

[0065] in such as figure 2 In the shown embodiment 2, the vehicle speed measuring device further includes a gravity sensor 4 installed on the two front wheel axles, and the gravity sensor is electrically connected to the vehicle speed controller. The vehicle speed controller is connected with the brake system and the engine system of the car, and can intelligently reduce the speed of the vehicle through the brake system and the engine system.

[0066] On the basis of the structure and vehicle speed measurement method of embodiment 1, the vehicle speed control method of embodiment 2 is: real-time measurement and acquisition of the gravity values ​​F of the two gravity sensors respectively installed on the left front wheel and the right front wheel axle 1 and F 2 , when the vehicle speed v G When ≥8m / s, calculate the ratio K of the large gravity value and the small gravity value of the two gravity sensors, that is, K=F 大 / F 小 , when K≥8, the vehicle speed controller control...

Embodiment 3

[0068] In embodiment 3, the vehicle speed measurement and control system also includes an alarm 5 (see image 3 ), 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. In this embodiment, the gravity values ​​F of the two gravity sensors installed on the axles of the left front wheel and the right front wheel are measured and obtained in real time. 1 and F 2 , when the vehicle speed v G When ≥8m / s, calculate the ratio K of the large gravity value and the small gravity value of the two gravity sensors, that is, K=F 大 / F 小 , when 8>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 or embodiment 2.

[0069] The present invention can accurately calculate the center point speed when the car is turning by measuring the speed and def...

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Abstract

The invention discloses an automobile speed measuring device and an automobile speed measuring and control method. The automobile speed measuring device comprises an automobile speed controller, a wheel deflection measuring instrument, a wheel speed measuring instrument and a gravity sensor. The speed and the deflection angle of two front wheels are measured in real time, the speeds, of moving around an instantaneous center, of the left front wheel and the right front wheel of an automobile generated when the automobile turns are converted into the moving speeds of the automobile center, the average value of the two automobile speeds at the automobile center serves as the actual running speed generated when the automobile turns, and meanwhile, the automobile speed can be controlled according to the stress condition of two front wheel shafts. According to the automobile speed measuring device and the automobile speed measuring and control method, the problems that in the prior art, the transmission box output shaft rotating speed is adopted to be converted into the automobile speed, the automobile speed accuracy is low when the automobile turns, the control accuracy is lowered, and the automobile running accidents are caused easily are solved effectively, and the device and the method have very high practical value.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to an automobile speed measurement device and a vehicle speed measurement and control method which can effectively measure and control 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 ...

Claims

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Application Information

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IPC IPC(8): G01P3/00
Inventor 刘富豪张海涛田新利
Owner YANCHENG INST OF TECH
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