Method of using double-rotating-speed sensor to measure vehicle speed

Abstract

A method of using a double-rotating-speed sensor to measure vehicle speed includes: mounting a table frame of an auxiliary drum in rear or front of a two-shaft four-drum vehicle speed meter testing table in a matched manner; mounting a rotating speed sensor on the two-shaft four-drum vehicle speed meter testing table; mounting one rotating speed sensor on the auxiliary drum. When actual vehicle speed of a double-shaft-drive vehicle is detected, no matter whether an inter-axle differential of the double-shaft-drive vehicle acts or not, linear speed of two driving shaft wheels are measured respectively, and an average value of instantaneous linear speed of the two driving shaft wheels at a same time moment is taken as actual instantaneous speed of the vehicle; or when a single-shaft-drive vehicle is detected on the two-shaft four-drum vehicle speed meter testing table, vehicle speed measured by the rotating speed sensor on the table frame is taken as actual vehicle speed of the vehicle.

Description

technical field [0001] The invention discloses a method for measuring the speed of a vehicle with a double rotation speed sensor, which is a method for detecting the actual speed of a single-axis drive vehicle and a double-axis drive vehicle, and belongs to the technical field of vehicle performance detection methods. Background technique [0002] The accuracy of the speedometer of a car is an important performance related to the safe driving of the car, and the accurate detection of the actual speed of the car when the speedometer indicates the specified value is the key factor for accurately detecting and evaluating the error of the speed representation value. The vehicle inspection station usually detects the actual vehicle speed of the vehicle on the two-axis four-roller speedometer test platform or the multi-axis multi-roller speedometer test platform, and then compares and evaluates the indicated value of the vehicle speed with the actual vehicle speed of the vehicle. T...

AI Technical Summary

Problems solved by technology

However, since many dual-axle drive vehicles (such as tractors) are disengaged from the inter-axle differential when driving on the road, there are few or even no working conditions that require locking the inter-axle differential. If it is not used for a long time, the locking system will easily fail. , usually does not need to be repaired and does not affect the road running of the car, or the inter-axle differential is not designed with a locking device. The rotational speeds of the drive shafts vary greatly, and the test bench can only measure the speed of the front drive shaft, but not the rear drive shaft, so the actual speed of the car in this condition cannot be accurately tested

[0005] (3) For a dual-axis drive vehicle, to detect the actual vehicle speed on a multi-axis and multi-drum speedometer inspection platform, it is necessary to lock the inter-axle differential, and to test the braking performance on a roller reaction braking platform, it is also necessary to disengage the inter-axle differential. Transmission, not only detection operation is troublesome, but also easy to damage the inter-axle differential if it is operated while the vehicle is running