CN209858754U

CN209858754U - Alarm device

Info

Publication number: CN209858754U
Application number: CN201822259488.6U
Authority: CN
Inventors: 周卫
Original assignee: Shanghai Chenxiao Electronic Technology Co Ltd
Current assignee: Shanghai Chenxiao Electronic Technology Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-12-27
Anticipated expiration: 2028-12-29

Abstract

The utility model relates to an alarm technical field, concretely relates to alarm device, wherein, include: two infrared correlation detectors which are positioned in the same plane and have the same structure; the infrared ray correlation detector includes: infrared light projector, infrared ray photic ware, parabolic mirror, partition panel, the middle part of parabolic mirror is equipped with the partition panel, and the partition panel falls into first launch site, second launch site with the parabolic mirror, and the partition panel is equipped with infrared light projector towards one side of parabolic mirror, and one side that the partition panel deviates from the parabolic mirror is equipped with infrared light photic ware. Through using the utility model relates to an alarm device, infrared ray correlation detector through two mutual shooting has 4 infrared light beam formation stealthy defensive lines of mutual shooting formula, blocks two adjacent light beams when people or other objects between this simultaneously, alright trigger the warning, only blocks two adjacent light beams simultaneously, triggers the warning promptly, its simple structure easily makes, installs.

Description

Alarm device

Technical Field

The utility model relates to an alarm technical field, concretely relates to alarm device.

Background

As is well known, in an infrared detector, a pyroelectric element detects the presence or movement of a human body and converts an output signal of the pyroelectric element into a voltage signal. Then, the voltage signal is subjected to waveform analysis. An infrared detector includes a pyroelectric element; a current-to-voltage converter that converts the current from the thermoelectric element into a voltage signal.

The existing infrared detector adopts a Fresnel lens, and utilizes the special optical principle of the lens to generate a blind area and a high-sensitivity area which are alternately changed in front of the detector so as to improve the detection receiving sensitivity of the infrared detector. When someone passes through the lens, the infrared rays emitted by the human body continuously and alternately enter a high-sensitivity region from a blind region, so that the received infrared signals are input in a pulse mode of being suddenly strong and weak, and the energy amplitude of the infrared signals is strengthened. The distance detected by the Fresnel lens is relatively short, and if the focal length needs to be adjusted to a far position, the detection of the Fresnel lens cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The application provides an alarm device for it is relatively nearer to solve the distance that adopts fresnel lens to survey among the prior art, can't reach the problem of detection effect when leading to surveying the region far away.

In order to achieve the above object, the utility model adopts the following technical scheme:

an alarm device, comprising: two infrared correlation detectors which are positioned in the same plane and have the same structure;

the infrared ray correlation detector includes: the infrared light projector comprises an infrared light projector, an infrared light receiver, a parabolic mirror and a partition board, wherein the partition board is arranged in the middle of the parabolic mirror and divides the parabolic mirror into a first emission area and a second emission area, the partition board is arranged on one side, facing the parabolic mirror, of the infrared light projector, and the partition board is arranged on one side, deviating from the parabolic mirror, of the infrared light receiver.

In the above alarm device, the infrared projector is composed of two infrared beam emitting tubes.

In the above alarm device, two through holes are provided in the partition panel, the infrared beam emitting tubes are provided in the two through holes, and the illumination surfaces of the two infrared beam emitting tubes are arranged toward the parabolic mirror.

In the above-mentioned alarm device, the illumination of one of the infrared beam emitting tubes faces the first emitting area, and the illumination of the other infrared beam emitting tube faces the second emitting area.

According to the alarm device of the embodiment, the scheme has the following effects:

1. the two infrared correlation detectors which are mutually reflected have 4 infrared beams which are mutually reflected to form an invisible defense line, and when people or other objects block two adjacent beams simultaneously between the two infrared correlation detectors, an alarm can be triggered;

2. only when two adjacent light beams are intercepted simultaneously, namely the alarm is triggered, the false alarm caused by the movement of some small animals can be eliminated, and the false alarm rate is reduced.

3. The structure is simple, and the manufacture and the installation are easy.

Drawings

FIG. 1 is a schematic view of an alarm device;

fig. 2 is a schematic diagram of the principle of transmitting and receiving two beams of side light of an alarm device.

Reference is made to the following in corresponding reference numbers in the drawings of the specification:

the infrared ray correlation detector comprises an infrared ray correlation detector 1, an infrared ray projector 2, an infrared ray light receiver 3, a parabolic mirror 4, a partition plate 5, a first emission area 6, a second emission area 7, an infrared ray beam emission tube 8 and a through hole 9.

Detailed Description

In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.

As shown in fig. 1, an alarm device includes: two infrared correlation detectors 1 which are positioned in the same plane and have the same structure; the infrared correlation detector 1 includes: infrared light projector 2, infrared light receptor 3, parabolic mirror 4, partition panel 5, the middle part of parabolic mirror 4 is equipped with partition panel 5, and partition panel 5 falls into first launching zone 6, second launching zone 7 with parabolic mirror 4, and partition panel 5 is equipped with infrared light projector 2 towards one side of parabolic mirror 4, and one side that partition panel 5 deviates from parabolic mirror 4 is equipped with infrared light receptor 3. In the embodiment of the present invention, the infrared projector 2 is composed of two infrared beam emitting tubes 8, two through holes 9 are formed in the partition board 5, the infrared beam emitting tubes 8 are formed in the two through holes 9, the illumination surfaces of the two infrared beam emitting tubes 8 are all disposed toward the parabolic mirror 4, and the illumination surface of one infrared beam emitting tube 8 faces the first emitting area 6 and the illumination surface of the other infrared beam emitting tube 8 faces the second emitting area 7. As shown in fig. 2, further, in the embodiment of the present invention, two infrared correlation detectors 1 located in the same plane are mutually correlated, two infrared ray receivers 3 emitting two infrared ray beams to the second infrared correlation detector 1 from the first infrared correlation detector 1, and two infrared ray receivers 3 emitting two infrared ray beams to the first infrared correlation detector 1 from the second infrared correlation detector 1, so that they form 4 infrared light beams of mutual emission type to form an invisible line, and when a person or other object blocks two adjacent light beams simultaneously between them, an alarm can be triggered.

To sum up, the utility model relates to an alarm device, infrared ray correlation detector through two mutual correlation has 4 infrared beam formation stealthy lines of preventing of mutual formula, blocks two adjacent light beams simultaneously when people or other objects between this, alright trigger the warning, only blocks two adjacent light beams simultaneously, triggers the warning promptly, can get rid of the wrong report that some toy activities arouse, has reduced the wrong report rate, its simple structure, easily makes, installs.

The above description has been made of specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. An alarm device, comprising: two infrared correlation detectors which are positioned in the same plane and have the same structure;

2. The warning device of claim 1 wherein the infrared light projector is comprised of two infrared beam emitting tubes.

3. The alarm device according to claim 2, wherein two through holes are formed in the partition plate, the infrared beam emitting tubes are disposed in the two through holes, and the illuminating surfaces of the two infrared beam emitting tubes are disposed toward the parabolic mirror.

4. The warning device as claimed in claim 3, wherein the infrared beam emitting tube is illuminated toward the first emitting region and the other infrared beam emitting tube is illuminated toward the second emitting region.