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Smoke alarm

A smoke alarm and smoke sensor technology, which is applied in the direction of fire alarms that rely on the effect of smoke/gas, can solve the problem of rare alarm devices in small occasions, and achieves low resistance to temperature and humidity, environmental impact, and response and Restoration features good effect

Inactive Publication Date: 2016-06-01
SHAANXI HI TECH ENERGY DEV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the development of society and economy, fire prevention work is becoming more and more important, but at present, many domestic research and development are focused on fire alarms in large places, but alarm devices suitable for small places are rare

Method used

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Embodiment Construction

[0014] A smoke alarm is composed of a power supply, a smoke sensor, an AD acquisition circuit, a button control, a main control single-chip microcomputer and an output circuit; wherein the smoke sensor is connected with the AD acquisition circuit, and the power supply, the AD acquisition circuit, the button control and the output circuit are all connected with the AD acquisition circuit. Main control single chip composition. Wherein, the main control single-chip microcomputer is STC89C52 type single-chip microcomputer. The smoke sensor model is MQ-2 sensor. AD acquisition circuit adopts ADC0832. The output circuit is divided into a display circuit and an alarm circuit. The alarm circuit is connected to the P3.6 port of the single-chip microcomputer by connecting a resistor in series with the base of the triode.

[0015] Smoke detection uses the MQ-2 sensor. After the ADC0832 is collected, the voltage values ​​under various smoke concentrations can be obtained. Thereby, th...

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Abstract

The invention relates to the technical field of fire control, and specifically relates to a smoke alarm. The smoke alarm is composed of a power supply, a smoke sensor, an AD acquisition circuit, a key control, a master control single-chip microcomputer and an output circuit, wherein the smoke sensor is connected with the AD acquisition circuit, and the power supply, the AD acquisition circuit, the key control and the output circuit are connected with the master control single-chip microcomputer. According to the invention, the sensor and the single-chip microcomputer are used as the core devices of the smoke alarm, and the sensor and the single-chip microcomputer can work together with other devices to achieve functions like acousto-optic alarm, automatic smoke exhaust and ventilation, and fire extinguishing. The smoke alarm has a simple structure, is economical and practical, and is applicable to small-range smoke detection. Moreover, the smoke alarm is of moderate sensitivity, and is advantaged in that the smoke alarm has good response and recovery characteristics and high long-term working stability and repeatability and is not easily affected by environment and temperature and humidity.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a smoke alarm. Background technique [0002] With the development of society and economy, fire prevention work is more and more important, but many domestic research and development focus on fire alarm in large places, but alarm devices suitable for small places are rare. SUMMARY OF THE INVENTION [0003] The present invention aims to provide a simple, economical and practical household smoke alarm. [0004] The technical scheme of the present invention is: [0005] A smoke alarm is composed of a power supply, a smoke sensor, an AD acquisition circuit, a button control, a main control single-chip microcomputer and an output circuit; wherein the smoke sensor is connected with the AD acquisition circuit, and the power supply, the AD acquisition circuit, the button control and the output circuit are all connected with the AD acquisition circuit. Main control single chip ...

Claims

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Application Information

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IPC IPC(8): G08B17/10
Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV