Cable fracture diagnosis device and related assemblies

Abstract

The invention discloses a cable fracture diagnosis device. The cable fracture diagnosis device is applied to a gear rotating speed measuring system; the gear rotating speed measuring system comprises a gear and a signal transmission cable. According to the technical schemes of the invention, a voltage division module and a voltage detection module are arranged, specifically, the voltage detection module judges whether a signal transmission cable is broken or not based on the state of the gear and a first voltage signal and a second voltage signal obtained by the voltage division module. Therefore, with the cable fracture diagnosis device provided by the technical schemes of the invention adopted, diagnosis can be carried out without participation of a background master control system, whether the signal transmission cable is broken or the measured value of the rotating speed of the gear is zero is judged, and the timeliness of cable fracture diagnosis can be improved. The invention also discloses a speed measurement module, a gear rotating speed measurement system and a gear rotating speed control system which have the same advantages as the cable fracture diagnosis device.

Description

technical field [0001] The invention relates to the fields of electronic circuits and safety, in particular to a disconnection diagnosis device, a speed measurement module, a gear speed measurement system and a gear speed control system. Background technique [0002] The industrial control industry often needs to measure the gear speed. Please refer to figure 1 , figure 1 It is a model schematic diagram of a gear speed measurement system in the prior art. The magnetoresistive sensor converts the speed signal of the gear into a periodic voltage signal and then connects it to the speed measurement module through the signal transmission cable. The frequency measurement module in the speed measurement module measures the voltage signal, and the processor measures the voltage signal measured by the frequency measurement module. After processing, the rotational speed of the gear can be obtained. [0003] In the prior art, when the speed of the gear is very low or very high (be...

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Problems solved by technology

[0003] In the prior art, when the speed of the gear is very low or very high (beyond the range of the speed measurement channel), the measurement result of the speed measurement module is zero; but when the signal transmission cable is disconnected, because the speed measurement module cannot receive the transmission of the magnetic resistance sensor voltage signal, at this time, the measurement result of the speed measurement module is also zero

In this way, the speed measurement module cannot identify whether the signal transmission cable is disconnected or the measured value of the gear speed is zero. It must rely on the judgment of the background master control system; and the corresponding control after the judgment of the background master control system is low.

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