Track voltage measuring device and measuring method

Abstract

The invention discloses a rail voltage measuring device and method, and belongs to the technical field of electrical measurement, the rail voltage measuring device comprises an acquisition device and a test device, and the acquisition device is connected with the test device; the acquisition device comprises an electric connection module and a voltage processing module, and the electric connection module is connected with the voltage processing module. According to the invention, weak voltage signals on the track can be amplified, and test errors caused by unreasonable contact form or poor contact can be avoided.

Description

technical field [0001] The invention relates to the technical field of electrical measurement, and more specifically relates to a track voltage measuring device and a measuring method. Background technique [0002] With the development of domestic rail transit, great attention is paid to the safety of the track structure, which includes the measurement of electrical parameters of the track structure. [0003] At present, the measurement of the electrical parameters of the track structure often involves the measurement of the track potential and the track potential difference, especially for the measurement of the longitudinal voltage of the track whose voltage amplitude is on the order of mV. The track voltage acquisition equipment is very accurate for the measurement. important. Therefore, it is necessary to design a reasonable rail voltage acquisition device for rail voltage measurement with a voltage amplitude lower than 1V. [0004] However, the current track voltage a...

AI Technical Summary

Problems solved by technology

[0005] 1. The fixing of the measuring equipment on the track structure is not firm;

[0006] 2. Poor contact of test equipment on the track surface, resulting in excessive contact resistance;

[0007] 3. The contact between the measuring equipment and the upper surface of the track is not a single-point contact, but a multi-point or surface contact, resulting in a small internal voltage division path, which has a greater impact on the test results;

[0009] 5. The contact pressure between the measuring equipment and the upper surface of the track is insufficient. When there is an oxide layer or oil on the upper surface, the contact resistance will increase;

[0010] 6. The measuring equipment itself does not have the ability to adjust the output of signals of different magnitudes, such as the ability to amplify weak electrical signals at the microvolt level, etc.

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