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Collapsible infrared alarm

An infrared light and alarm technology, which is used in alarms, anti-theft alarms, instruments, etc., can solve the problems of false alarms, small beams, and missed alarms, and achieve the effects of good prevention performance, reduced manufacturing costs, and light weight.

Inactive Publication Date: 2008-11-19
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

But it is not difficult to find that these infrared alarm equipment have defects:
[0003] Because the laser can only emit a beam of infrared wavelength light, and generally its beam is not large, if the suspect unconsciously avoids the beam and forcibly enters, if figure 1 As shown, false alarms will inevitably occur and cause serious adverse consequences; or when small uninvited guests such as cats and mice intersperse the optical path, false alarms may occur

Method used

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0028] see first figure 2 , figure 2 It is the optical path structure and the composition frame of the device of the foldable infrared laser alarm of the present invention. As can be seen from the figure, the foldable infrared laser alarm of the present invention is composed of an infrared light emitting head 1, a high reflection strip 2, an infrared light receiving head 3 and The alarm consists of 4 components. Infrared light emitting head 1 such as image 3 As shown, it includes light emission drive power 5 , infrared light source 6 , optical collimation system 7 , frame 8 and other components. Infrared light receiving head 3 such as Figure 4 As shown, it includes a receiving optical system 9 , a photodetector 10 , an amplifying circuit 11 and a case 12 and other c...

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Abstract

A folding infrared alarm comprises an infrared emitting head, an infrared light receiving head and an alarm, and is characterized in that a required anti-theft door frame or window frame is provided with high infrared reflectance or with an infrared high-reflectance slat; the light emitted by the infrared emitting head is reflected by the infrared high-reflectance slat of the door frame or window frame for multiple times to form an invisible light grid barrier and enter the infrared light receiving head; once the infrared light is blocked, the alarm gives an alarm. The invention can accurately give an alarm.

Description

technical field [0001] The invention relates to an optoelectronic anti-theft system, in particular to a foldable infrared light alarm. technical background [0002] Existing electronic anti-theft devices or systems of a great variety now are used for anti-theft and anti-theft of families, institutions, enterprises and institutions, and play an important role of electronic police, receiving powerful effects. Make a general survey of existing optoelectronic anti-theft devices, one of them adopts infrared technology, including passive and active two series. Passive infrared alarm is a device that uses infrared receiving devices to receive the infrared rays radiated by human body temperature to realize electronic alarm, such as patent examination announcement number: 2466330, 2489075, etc.; active type uses infrared laser beams that cannot be seen by human eyes , as an invisible wall, when someone tries to forcibly invade and the human body cuts the light beam, an alarm will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/184
Inventor 陈高庭蔡海文董作人方祖捷
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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