Low-voltage warning device

Abstract

The invention provides a low-voltage warning device which essentially consists of a voltmeter, a bidirectional electromagnetic relay, an acousto-optic system and a battery. The voltmeter is internally provided with a sliding rheostat with non-uniform resistance, and the sliding rheostat has higher resistance at low voltage and lower resistance at high voltage; when the voltage of an output system is higher than a working voltage, an output circuit works normally, and when the voltage of the output system is lower than the normal working voltage, an voltage pointer is at the higher position of the sliding rheostat so as to reduce the current of the circuit instantaneously; the bidirectional electromagnetic relay can cut off the output circuit and put through a low-voltage warning circuit so as to warn by the acousto-optic system. The warning device has obvious effects that as the bidirectional circuit of the relay is used for a control warning circuit, not only the battery electricity quantity can be known at any time so as to exchange in time and reduce the loss caused by not changing the battery in time; but also the whole system does not cost extra electricity, thus being more convenient and safer.

Description

technical field [0001] The invention relates to a reminder device, in particular to a low-voltage reminder device. Background technique [0002] Alarm, that is, anti-theft device, is a general term for electronic products used to issue alarms in the form of sound, light, air pressure, etc. in the event of alarm, danger, and emergency situations. With the advancement of science and technology, mechanical alarms are more and more replaced by advanced electronic alarms, which are often used in system failure, safety precautions, transportation, medical rescue, emergency relief and other fields, and are inseparable from social production and life. . With the development of the domestic security market, the current anti-theft device market is becoming more and more mature. The alarm mainly uses the existing telephone network or wireless mobile phone GSM network to connect to the owner's phone or mobile phone through wireless or wired methods to realize the remote anti-theft fun...

AI Technical Summary

Problems solved by technology

[0003] Nowadays, there are many low-priced products on the market, which are deeply loved by consumers, but the quality of the products is poor, the quality is unstable after purchase, and the false positive rate is high. At the same time, consumers are pursuing a fashionable life and pay attention to the beauty of their living environment.

However, many users ignore that the battery of the alarm often needs to be replaced when using it, and accidents due to the dead battery also occur from time to time, which greatly reduces the function of the alarm.

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