Displacement type tension monitoring module for cables and electronic fence using same

Abstract

The invention relates to a displacement type tension monitoring module for cables, comprising a tension test arm and a driven signal output device; the tension test arm is connected with the driven signal output device and fixedly connected with a cable to be tested; the driven signal output device comprises a displacement sensor; and the device comprises a signal output end and a power input end so as to trigger the displacement sensor to output signals when the tension test arm displaces. According to the module, a gravity sensor is used for sensing that the cable displaces due to tension pull and then measuring the tension; and through arranging a simple mechanical transmission structure, the distance between a test circuit and the cable to be tested is enlarged, and the possibility that the cable has high voltage to puncture the test circuit is avoided.

Description

technical field [0001] The invention relates to a tension monitoring module, in particular to a displacement type tension monitoring module for cables and an electronic fence using the same. technical background [0002] In order to prevent theft or further enhance the alarm function, a tension monitoring module can be added to the power cable or electronic fence circuit, that is, when someone touches vigorously, or cuts off the fence circuit cable / power cable to change the cable tension, the tension will The monitoring module will send an alarm signal to the host to attract the attention of the management personnel and play an anti-theft effect. [0003] Existing tension monitoring modules are usually strain-type tension monitoring modules, which include a test circuit and a strain resistance connected to the test circuit. Usually, the strain resistance is connected in the circuit to form a Wheatstone bridge and outputs a differential signal. When in use, stick the resista...

AI Technical Summary

Problems solved by technology

[0004] However, this kind of monitoring module directly connects the cable to the test circuit. If the cable shell is worn out due to long-term use, and the cable with voltage inside is in contact with the strain gauge, it will cause the entire monitoring module to fail, especially when the power cable is a high-voltage cable. Or electronic fences usually use high-voltage pulses as test signals, it is easy to break down the circuit, causing damage to the entire monitoring module and even the host

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