Micro-current induction power supply type temperature measurement and alarm device and temperature measurement and alarm method

Abstract

The invention discloses a micro-current induction power supply temperature measuring and alarming device and a temperature measuring and alarming method. The micro-current induction power supply temperature measuring and alarming device comprises an inductive electricity taking circuit and a temperature measuring and alarming circuit, wherein the inductive electricity taking circuit provides a power supply for the temperature measuring and alarming circuit; the inductive electricity taking circuit comprises a current inductor, a rectification filter circuit, a voltage stabilizing circuit, a voltage monitoring chip and a three-terminal switch, the current inductor is composed of an unclosed magnetic core and a coil which winds the unclosed magnetic core, the power supply output from the coil is controlled to output through the three-terminal switch after being rectified, filtered and stabilized, and the on / off of the three-terminal switch is controlled through the voltage monitoring chip. The micro-current induction power supply temperature measuring and alarming device automatically goes to sleep at definite time or under low voltage, so that the electric energy consumption is lowered, and the effective micro-power consumption work is realized. The temperature measuring and alarming device has advantages of convenience in mounting, small volume, low cost and high reliability, is applicable to various small spaces on site, and prompts the user to pay attention to the temperature abnormity of the equipment through different colors of light so that the user is convenient to observe in long distance.

Description

technical field [0001] The invention relates to a temperature measurement and alarm device, in particular to a micro-current induction power supply type temperature measurement and alarm device and a temperature measurement and alarm method applied to electrical equipment. Background technique [0002] The live display and temperature measuring device is mainly used in the power industry, mainly to complete the temperature monitoring of the connection points of various indoor and outdoor electrical equipment and realize the function of live display and temperature over-limit alarm. [0003] Power equipment operates under high voltage and high current conditions for a long time, so the electrical connection point is easy to burn the equipment due to high temperature of the electrical connection point due to poor contact. [0004] Since electrical equipment operates under high voltage conditions, it is difficult to monitor the temperature by means of detection means such as th...

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Problems solved by technology

This kind of temperature-sensitive luminous cap uses the principle of current transformer to take power, but the volume of current transformer is relatively large, the installation is very troublesome, and the cost is high, which seriously limits the actual application effect in the field of distribution network equipment and other fields, so it is very difficult Difficult to popularize

In addition, the current transformer is a closed magnetic circuit, because the large current circuit will form a strong electromagnetic field, if there is a closed magnetic circuit, it will cause eddy current loss, and the eddy current loss will cause serious heat generation. The magnetic circuit is closed, so the temperature measuring device that takes power from the current transformer cannot be used in a large current circuit

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