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Small-size low-voltage high-performance output alarm device

An output alarm and high-performance technology, which is applied in the direction of stereo systems, sound-generating devices, instruments, etc., can solve problems such as difficult application, large volume of auto-coupling inductors, and low sound pressure, and achieve the effect of meeting miniaturization and use requirements

Inactive Publication Date: 2020-12-01
CHANGZHOU BESTAR INTELLIGENT TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In the occasion of 4.5-12V low-voltage power supply, ordinary active piezoelectric alarms often have low sound pressure and cannot meet the requirements of use; while active piezoelectric alarms with high sound pressure use self-coupling inductors to drive piezoelectric alarms , due to the relatively large size of the auto-coupling inductor itself, it is difficult to apply it to smaller devices

Method used

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  • Small-size low-voltage high-performance output alarm device

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0015] Such as figure 1 As shown: In order to effectively realize the output of sound pressure alarm information and meet the needs of miniaturization, the present invention includes a piezoelectric alarm for outputting alarm information and an alarm drive circuit for driving the piezoelectric alarm. And a boost power supply circuit for providing the working voltage required by the alarm drive circuit;

[0016] The piezoelectric alarm adopts a passive piezoelectric alarm. The driving circuit of the alarm includes a signal generating circuit, an operational amplifier U1A that is adaptively connected to the PWM-A signal output end of the signal generating circuit, and a PWM-B signal of the signal generating circuit. The output terminal is adapted to be connected to the operational amplifier U1B, wherein the non-inverting terminal of the operational amplifier U1A...

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Abstract

The invention relates to an alarm device, in particular to a small-size low-voltage high-performance output alarm device. According to the technical scheme provided by the invention, the small-size low-voltage high-performance output alarm device comprises a piezoelectric alarm used for outputting alarm information, an alarm driving circuit used for driving the piezoelectric alarm to work, and a boost power supply circuit used for providing working voltage required by the alarm driving circuit. According to the invention, the piezoelectric alarm can adopt a passive sound pressure alarm. Working voltage of the alarm driving circuit can be provided through the boost power supply circuit. PWM-A driving signals and PWM-B driving signals can be amplified through an operational amplifier U1A andan operational amplifier U1B in the alarm driving circuit, so that driving of the piezoelectric alarm can be met, output of sound pressure alarm information can be effectively achieved, the use requirement for miniaturization is met, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to an alarm device, in particular to a small-volume, low-voltage, high-performance output alarm device. Background technique [0002] The active piezoelectric alarm is an integrated electronic sounder, which is used in electronic equipment due to its high sound pressure and low power consumption. In the occasion of 4.5-12V low-voltage power supply, ordinary active piezoelectric alarms often have low sound pressure and cannot meet the requirements of use; while active piezoelectric alarms with high sound pressure use self-coupling inductors to drive piezoelectric alarms , due to the relatively large size of the auto-coupling inductor itself, it is difficult to apply it to smaller devices. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a small-volume, low-voltage, high-performance output alarm device, which can effectively realize the output of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/122G10K9/122
CPCH04N13/122G10K9/122
Inventor 张军伟张辉徐金国
Owner CHANGZHOU BESTAR INTELLIGENT TECH
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