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Touch-type alarm

A kind of alarm, touch technology, applied in the field of alarm

Inactive Publication Date: 2015-06-10
吴汉肱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can generate an alarm signal when human body contacts

Method used

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  • Touch-type alarm

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Embodiment Construction

[0010]

[0011] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0012] refer to figure 1 The schematic diagram of the circuit structure of the present invention is shown.

[0013] In the embodiment of the present invention, the NE555 time base integrated chip is composed of a monostable trigger through R1, C1, C2, and C3. When no one touches the metal mesh, the circuit processing is in a steady state, and the NE555 outputs a low level. When someone triggers the metal mesh When the pulse is input to NE555, the monostable circuit is triggered to turn over and enter the temporary stable state, and output high level, so that V1 is turned on, V2 is also turned on, IC is powered on, and an alarm signal is output, through the complementary circuit formed by V3 and V4 The amplifier is amplified to drive the alarm to work. ...

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PUM

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Abstract

An embodiment of the invention discloses a touch-type alarm comprising a 555 time-base integrated chip forming a monostable trigger. A second pin of the 555 time-base integrated chip is connected to a touch net, a third pin is connected to the base electrode of a first NPN triode through a first resistor, an emitting electrode of the first NPN triode is connected to the base electrode of a second NPN triode, and the emitting electrode of the second NPN triode is connected to the negative electrode of the power supply. The touch-type alarm further comprises a four-tone analog integrated chip; the negative pin of the four-tone analog integrated chip is connected to the collecting electrode of the second NPN triode, and the output end controls an alarm body to switch on or off through a third NPN triode and a PNP triode. According to the touch-type alarm, since the touch net is arranged, the alarming signal is produced when a human body contacts with the touch net, and people can be prevented from entering a dangerous region; in addition, the touch-type alarm can be applied to family alarm.

Description

technical field [0001] The invention relates to an alarm, in particular to a touch alarm. Background technique [0002] At present, there are many kinds of alarms, and for some dangerous areas, the human body is not allowed to access or contact. Although it is marked with dangerous words, it still cannot avoid the human body approaching. cause unnecessary harm. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a touch alarm. An alarm signal can be generated when the human body contacts. [0004] In order to solve the above technical problems, the embodiment of the present invention provides a touch alarm, including a 555 time base integrated chip forming a monostable trigger, the second pin of the 555 time base integrated chip is connected to the touch network, and the third The pin is connected to the base of the first NPN transistor through the first resistor, the emitter of the first NPN t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/22
CPCG08B13/22
Inventor 吴汉肱
Owner 吴汉肱