Wrist wearing type digital electric field detection meter

Abstract

The invention discloses a wrist-wearing type digital electric field detecting meter which comprises a meter band, a meter shell and a meter core arranged in the meter shell. The wrist-wearing type digital electric field detecting meter is characterized in that the meter core comprises a liquid crystal display screen, a detecting circuit board, a battery block, an annular antenna, an upper rubber jacket and a lower rubber jacket, wherein the liquid crystal display screen, the upper rubber jacket, the detecting circuit board and the lower rubber jacket are sequentially stacked together and fixed into an integral structure through meter core connecting screws, and the annular antenna encircles round the integral structure; and the detecting circuit board comprises an amplifier, an AD converter, a microprocessor, a buzzer and an LED lamp. The wrist-wearing type digital electric field detecting meter takes quantitative detection as the basic point of departure and a processor as a core, realizes the accurate and reliable power-frequency electrical field strength detection, can assist a user to accurately know the electrification condition of equipment in a high-voltage environment so as to improve the security, can achieve the quantitative display of the electric field information, is favorable for the user to accurately know the electrification distribution condition of the equipment and has the advantages of high reliability, various output measures, and the like.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a digital electric field detection meter which can be worn on the wrist of a human body and is used for quantitative detection and alarm of high-voltage electric field strength in the atmosphere. Background technique [0002] In high-voltage electrical work, electric shock casualties often occur due to misjudgment of charged objects as non-electric objects. Since it is not convenient to carry out contact measurement on high-voltage live equipment such as high-voltage wires, switch cabinets, and transformer terminals, it is possible to indirectly judge whether the equipment is live or not by detecting the high-voltage electric field, so as to reduce false contact accidents. [0003] At present, there are two main methods for wrist-worn electric field detection alarms (also known as watch-type near-electric alarms): one is the field effect tube grid induction method, and the othe...

AI Technical Summary

Problems solved by technology

If the alarm threshold is lowered to improve alarm security, false alarms will increase; if the alarm threshold is increased, security risks will be brought

For example: when the induced voltage is lower than the threshold, even if the high-voltage electric field is already strong at this time, the user will still judge that there is no electricity, which is not conducive to the user's predictive behavior and affects safety.

[0010] 2. Low accuracy and reliability

Due to the inherent parameter dispersion and poor anti-interference ability of analog circuits, the accuracy and reliability of detection are limited

[0011] 3. Poor frequency selectivity

Although the detection object is a power frequency electric field signal with a frequency of 50Hz, due to the level limit detection method, interference signals of other frequencies, such as pulse signals and static signals, may cause false alarms

Images