Vehicle pull line type displacement measuring device

Abstract

The invention discloses a vehicle pull line type displacement measuring device. The device comprises a pull line type displacement sensor, a first moving component, a second moving component and a locking mechanism. The first moving component includes a first guiding component and a first moving component which moves along the first guiding component. The second moving component comprises a second guiding component and a second moving component which moves along the second guiding component. The pull line type displacement sensor is installed on the second moving component. The second guiding component is installed on the first moving component. Moving directions of the first moving component and the second moving component are vertical. The first guiding component is installed on a locking mechanism. In the invention, through mutual slide between a rolling bearing and a bearing guide rail, and between a guide rail slide block and a linear optical axis, vertical and transverse degrees of freedom are possessed; during a dynamic displacement test process, a sensor pull line can be ensured to be basically consistent with a vertical direction of a vehicle so as to reduce a dynamic error caused by vehicle pitch and roll to the maximum extent, and improve displacement test accuracy.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle pull-wire type displacement measuring device. Background technique [0002] With the rapid development of automobile industry technology, indoor road simulation tests and CAE analysis of virtual prototypes are used in the research process of a wide range of new vehicle models. At present, the vertical load of the vehicle axle is usually used to reproduce the driving of the vehicle on the road test site. In this case, the reliability and durability of the vehicle are developed. In addition, the relative displacement of the axle and the body is an important monitoring input signal of the vertical channel of the whole vehicle. It is an important test parameter in the process of road load spectrum acquisition and test, and its measurement accuracy is very important for the accurate development of road simulation and simulation. . [0003] In the existing testing techn...

AI Technical Summary

Problems solved by technology

[0004] (1) Inconvenient installation

Welding the simple base equipped with displacement sensors to the body or axle is inconvenient to disassemble, time-consuming and labor-intensive, and it is easy to cause local stress concentration of the vehicle and affect the fatigue strength of the vehicle

[0005] (2) The accuracy of measurement data is low

On the one hand, when the displacement sensor is installed, it cannot be guaranteed that the sensor cable is completely consistent with the vertical direction of the vehicle, which is prone to measurement errors

On the other hand, during the actual driving test process, due to the dynamic driving pitch and roll of the vehicle, there are longitudinal and lateral relative displacements at the upper and lower ends of the cable, which makes the displacement of the test data in the non-vertical direction, resulting in dynamic errors.

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