Alcohol detection alarm device

An alarm device, a technology for alcohol detection, used in measuring devices, material analysis by electromagnetic means, instruments, etc.

Inactive Publication Date: 2011-04-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical problem to be solved is: the device directly collects the alcohol content in the air in the car during the process of detecting the alcohol conten

Method used

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  • Alcohol detection alarm device
  • Alcohol detection alarm device
  • Alcohol detection alarm device

Examples

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Embodiment Construction

[0026] This embodiment is an alcohol detection and alarm device. see figure 1 , figure 2 , The circuit diagram is composed of alcohol sensor detection circuit, impedance matching circuit, signal light indicating circuit, voltage frequency conversion circuit, frequency division circuit, monostable trigger circuit, alarm generator circuit and external terminals. The sensor detection circuit 1 detects the alcohol concentration in the air in real time, converts the concentration signal into a voltage signal output, and the voltage signal is divided into two channels, one of which is input to the positive comparison terminals of the two voltage comparators, and compared with two preset reference voltages , when the corresponding indicator light is on, it indicates that the measured alcohol concentration has exceeded its preset critical value respectively; A lower frequency trigger pulse signal controls the frequency at which the buzzer sounds.

[0027] The sensor detection circ...

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Abstract

The invention discloses an alcohol detection alarm device which is used for detecting alcohol content in air or breath of a drunk driver and giving an alarm, and the alarm frequency of the alcohol detection alarm device varies with the change of the detected alcohol concentration. The alcohol detection alarm device comprises a sensor detection circuit, a signal conversion circuit and an alarm circuit, wherein the signal conversion circuit converts a voltage signal into a frequency signal so that the alarm frequency can increase with the rise of the alcohol concentration. When the detected alcohol concentration is low, an alarm sound is a prompt tone for prompting the drunk driver; and when the detected alcohol concentration is high, the alarm circuit alarms frequently, and the alarm sound becomes noise to agitate the drunk driver to force the drunk driver to give up driving. Meanwhile, the alcohol detection alarm device has the functions of directly detecting the alcohol concentration in breath and outputting an alcohol concentration signal in an external access way, is mainly applied to vehicle-mounted alcohol detection and an alcohol industry field, and can be used as portable alcohol detection equipment.

Description

technical field [0001] The invention relates to a gas detection device, in particular to an alcohol detection and alarm device, which is used to detect the alcohol content in the air in the car, or directly detect the alcohol concentration of the breath exhaled by the drinker, and can automatically detect the alcohol concentration according to the alcohol content. Change the frequency of the alarm. Background technique [0002] With the development of society, people's life is getting richer and richer. People's communication and entertainment are also increasing, and the phenomenon of drunk driving is not uncommon, and the traffic accidents caused by drunk driving occur from time to time, and drunk driving has seriously threatened life safety, property safety, and traffic order. In order to prevent traffic accidents caused by drunk driving, the traffic management department has adopted a variety of measures to control the phenomenon of drunk driving, and many people have p...

Claims

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Application Information

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IPC IPC(8): G01N27/00
Inventor 石伟谢拴勤张震张磊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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