Non-contact type power-off sensor

Abstract

The invention relates to a non-contact power-off sensor. The sensor includes a first electrode and a second electrode. The first electrode and the second electrode assume the shape of a cambered surface so as to acquire more electric field change signals in alternating electric field detection of a to-be-detected cable. According to the invention, the sensor adopts multiple-electrode sampling, uses the characteristics of high impedance of a single chip microcomputer I / O port and arranges a plurality of sampling electrodes in a product, which can effectively avoid wrong determination brought by zero vector sum of the electric field when the cable only has three phases, namely A, B and C phases; is made in an arc shape so as to attach closely to the cable, which increases the range of sensing and sensing determination effects; uses the only encoded steel cable ties in installation, which replaces nylon cable ties which are easily damaged or requires exchanging when unauthorized.

Description

technical field [0001] The invention relates to a non-contact power failure sensor. Background technique [0002] With the continuous expansion of the mobile communication network, the number of base stations is also increasing rapidly, but most of the base stations are located in the wild unattended environment, the environment is relatively harsh, and there is great uncontrollability. The high-quality operation of the base station is the top priority of the construction and maintenance work. How to keep abreast of the AC power supply status of the base station and effectively ensure the normal operation of the base station is the main problem facing the base station maintenance personnel. [0003] At present, the mains power failure detection of the base station uses a non-contact sensor, which judges the presence or absence of the mains by sensing the electric field in the power supply line. , can avoid safety risks and electric shock accidents caused by live installatio...

AI Technical Summary

Problems solved by technology

[0004] 1. The sensing condition of the existing sensor is that there is only live wire and no neutral wire in the tested cable; there is a risk of misjudgment caused by the vector sum of the electric field being zero when there is three-phase electricity;

[0005] 2. The flat design of the existing sensor has a small sensing range, and there is a risk of not being able to sense it

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