Multi-touch piezoelectric alarm circuit

An alarm circuit, multi-touch technology, applied in the direction of alarms, instruments, etc., to achieve the effect of high sensitivity, no need to replace batteries, and strong reliability

Active Publication Date: 2017-01-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the piezoelectric alarm circuit, there is no relevant patent in China at present, and there are many patents on the alarm

Method used

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  • Multi-touch piezoelectric alarm circuit

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Embodiment Construction

[0021] The present invention will be further described in detail below in combination with specific embodiments.

[0022] Such as figure 1 As shown, a multi-touch piezoelectric alarm circuit includes an energy storage circuit and an alarm circuit, and the energy storage circuit is composed of a light emitting diode (2), a switch S1 (1), a piezoelectric sensor (3), a full bridge Composed of a rectifier circuit (4), a capacitor C1 (6), and a rechargeable battery pack (7); the full-bridge rectifier circuit (4) is composed of four diodes (5); the alarm circuit is composed of a switch S2 (8), Sliding resistor (9), 555 timer chip (10), resistor R1 (11), resistor R2 (12), resistor R3 (16), resistor R4 (25), resistor R5 (26), HS9561 chip (13) , buzzer (14), triode (15), capacitor C2 (17), capacitor C3 (19), capacitor C4 (21), capacitor C5 (24), two-color light-emitting diode (18), ground wire (20), A vibration sensor (22) and an electrode sheet (23) are formed.

[0023] Close the s...

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PUM

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Abstract

A multi-touch piezoelectric warning circuit comprises an energy storage circuit and an alarm circuit. The multi-touch piezoelectric warning circuit adopts three triggering modes, the first mode is that a produced current fluctuation signal is transferred to a 555 timer chip to give an alarm when a piezoelectric sensor produces vibration, the second mode is that the produced fluctuation signal is transferred to a 555 timer chip to give an alarm when an electrode plate produces vibration, the third mode is that a TR interface of the 555 timer chip is connected with a grounding wire to produce low level and give an alarm when a vibration sensor produces vibration. Energy used by the multi-touch piezoelectric warning circuit is produced through the piezoelectric sensor and stored for utilization, and the piezoelectric sensor is a multi-layer composite plate or a beam structure and comprises a piezoelectric layer and a metal base layer. The multi-touch piezoelectric warning circuit is high in sensitivity and reliability, uses self-generated electricity energy and does not need battery replacement or external charging and other operations.

Description

technical field [0001] The invention relates to a multi-touch piezoelectric alarm circuit, which can provide energy by using vibration power generation of piezoelectric sensors, has three trigger modes, high reliability and high sensitivity, and belongs to the field of electronic control. Background technique [0002] Harvesting energy from the environment to power low-power devices is a new type of energy supply technology that simultaneously applies three control methods: the electrical signal generated by the piezoelectric sensor, the wave signal generated by the electrode sheet, and the circuit on-off control of the vibration sensor. Into the alarm circuit, it is a great optimization of the alarm circuit. [0003] The piezoelectric alarm circuit has the characteristics of energy saving and emission reduction, high sensitivity and strong reliability. Regarding the piezoelectric alarm circuit, there is no relevant patent in China at present, and there are many patents on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B23/00
CPCG08B23/00
Inventor 姚明辉李印波张伟崔云涛
Owner BEIJING UNIV OF TECH
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