Test system for obtaining position of moving body

Abstract

The present invention provides a test system for obtaining the position of a moving body. The test system comprises at least one set of a sensitive body arranged on a moving body to be measured, a position sensing unit, a photoelectric unit, a position signal transmission optical cable and a position data processing unit; the position data processing unit includes a box body and three sensors of the same type, wherein the three sensors are arranged at certain intervals so as to form a structure shaped like a Chinese character "pin"; the sensors are arranged in the box body; the box body is fixed at a position which is separated from the sensitive body by a detection distance; the photoelectric unit is arranged in the box body and is used for performing photoelectric isolation and level conversion on electric signals which reflect the position of the moving body and are outputted by the position sensing unit so as to obtain optical signals which can be remotely transmitted by the optical cable and reflect the position of the moving body; the position signal transmission optical cable is used for transmitting the optical signals to the position data processing unit; and the position data processing unit is used for obtaining the position of the moving body to be measured according to the optical signals. According to the test system of the invention, the optical cable is adopted as a signal transmission medium, can remotely transmit signals and has strong anti-electromagnetic interference capacity.

Description

technical field [0001] The invention belongs to the technical field of non-contact measurement, and more specifically relates to a test system for acquiring the position of a moving body. Background technique [0002] At present, there are many ways to test the key position of the moving body. For example, the displacement sensor using the Hall effect can measure the motion of the magnet attached to the shaft or the moving body to obtain the motion parameters of the measured body. However, because the Hall element is a Magnetic sensitive components require that the measured object must be a magnetic material, so it is easily affected by strong electromagnetic interference. In addition, there are currently testing systems based on optical principles that use lasers, gratings or grating rulers. They are especially suitable for workplaces with strong electromagnetic interference. However, due to their optical testing principles, their maximum working environment temperature, M...

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Problems solved by technology

[0004] In view of the defects of the prior art, the object of the present invention is to provide a test system for obtaining the position of the moving body, which aims to solve the problem of inability to adapt to the harsh working environment, weak anti-electromagnetic interference ability, low accuracy and reliability of testing the key position of the moving body. not high enough

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