Low-voltage warning device

A reminder device, low-voltage technology, applied in measuring devices, measuring current/voltage, instruments, etc., can solve problems such as high false alarm rate, unstable quality, and low product quality, and achieve the effect of reducing losses

CN101561461AInactive Publication Date: 2009-10-21WUJIANG JINDA PRECISION MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-10-21
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0009] Below in conjunction with the accompanying drawings the present invention is further described: a sliding rheostat with uneven resistance is arranged in the voltmeter 4, and the resistance of the sliding rheostat is higher in the low-voltage region 1, and lower in the working voltage region 2. When the output system voltage When the voltage is higher than the working voltage, the pointer 3 of the voltmeter 4 is located in the working voltage zone 2, and the output circuit works normally. The current of the circuit is reduced instantaneously, the bidirectional electromagnetic relay is disconnected from the output circuit, and the low-voltage warning circuit is connected to remind through the sound and light system.

[0010] The beneficial effect of the present invention is that the two-way circuit of the relay is used to control the alarm circuit, not only the battery power can be known at any time, and the battery can be replaced in time, reducing the loss caused by not ...