CN2453410Y - Investigating means with super broad investigating angle - Google Patents

Abstract

The utility model relates to an infrared detector, which comprises a fixing seat and a body. The interior of the body is provided with a circuit board device which is carried with each element of a detecting input processing circuit which comprises an infrared sensing element, a signal deviation plate which can be combined with the sensing element can be positioned on the circuit board device, and a focusing mirror slice which is provided with a plurality of incidence mirrors in dividing states and is arranged on the body, the signal deviation plate is a symmetrical structure, and is provided with two or more than two reflection planes. The focusing energy is raised by matching with the single-point focusing principle of the incidence mirrors, and thus, optimum sensitivity and greater detecting angle are obtained.

Description

Detector with super wide-angle detecting angle

The utility model is about a kind of ultrared sensing device, especially refer to a kind of the lifting greater than above detecting sensitivity and the angle of 120 degree, make it can obtain the above reconnaissance range of nearly 200 degree, and the single-point focusing principle of collocation multiaspect incident mirror obtains the highest optical gain, and reaches the above reflection of 200 degree to eliminate dead detecting angle.

Generally speaking, thermoelectric (al) type ultrared sensing device can be used in burglary-resisting system, temperature detector system, lighting control system and various automatic control system effectively.For example be applied to the incident infrared that is sent by human body and carry out its detecting operation by above-mentioned ultrared sensing device, this kind detector can be installed in the surveillance of buildingss such as building, to give the alarm when the people swarms into or to carry out other functions.

Only the angular range of its detecting of this kind ultrared sensing device at present is greatly between 110 degree are spent to 120, and can't reach 180 reconnaissance ranges of spending, in the corner in room, the dead angle on the detecting angle has appearred then for example, and the increase that this dead detecting angle will be directly proportional with the increase in space.At the problems referred to above, existing many patent cases propose solution, for example United States Patent (USP) the 5th, 103, the infrared ray that No. 346 (Nally Chang) discloses incident surpasses the detecting angle that detects element, then via the left wing of signal deviation plate or right flank and refract to and detect element, make its detecting angle can reach the reconnaissance range of 180 degree, be synoptic diagram as shown in Figure 1 for this case detecting angle, by finding out among the figure that this case can't have induction between 70 degree and 80 degree, form the dead detecting angle in A1 zone, with regard to its reason then is only can enter and detect element through special angle (90 degree) reflected energy because of signal deviation plate, so, can't must chat with benefit with the focusing lens energy focusing to detecting element.Other patent relevant with this respect also comprises United States Patent (USP) 3,923, No. 382 (Harding), 4,268, No. 752 (Herwig et al), 4,644, No. 147 (Zublin), 4,703, No. 171 (Kahl et al).

Fundamental purpose of the present utility model is will promote greater than above detecting sensitivity and the angle of 120 degree, and it has catoptron more than two or two with the design of signal deviation plate; And focusing lens is the incident mirror with increased area, converge the infrared energy of incident, and the angle of each catoptron is the space of 5-20 degree, therefore focusing lens is gathered in each catoptron and is projeced into infrared ray and detects element scope about 10 degree is all arranged, so that signal deviation plate has the above reconnaissance range of 200 degree, the single-point focusing principle of focusing lens of arranging in pairs or groups is simultaneously obtained the highest optical gain, and reaches the above reflection of 200 degree to eliminate dead detecting angle.

The utility model under take off and proposed foot in the claim and may regard as novel characteristics.A kind of ultrared sensing device with super wide-angle detecting angle includes: a holder; One body is to combine with this holder; One circuit board arrangement is to be configured in body interior, is loaded with each element of detecting input processing circuit on it, and this detecting input processing circuit includes infrared ray and detects element; One assembles eyeglass, be device on body, and be positioned at this place ahead that detects element and focal position thereof, it can focus on the infrared ray of incident; And a signal deviation plate, be to detect combination of elements with this and be placed on the circuit board arrangement, it has the reflector elements of one group of symmetrical structure, and every group of reflector elements has the plane of reflection more than two or two.

Wherein this focusing lens has several incident mirrors of cutting apart aspect, the focus under this incident mirror all has.

Wherein this symmetrical reflector elements is divided into an obtuse angle each other mutually.

Wherein two side rearview mirrors of this focusing lens can converge the infrared ray greater than 120 degree incidents, and this two side rearview mirror further includes the catoptron that is arranged above and below, and catoptron has its affiliated focus up and down.

Composition of the present utility model together with other purposes and advantage etc., should be implemented the detailed description of falling with reference to the detailed the utility model of readding of following accompanying drawing, can thoroughly understand, wherein:

Fig. 1 is the detecting angle synoptic diagram of known detector;

Fig. 2 is a three-dimensional view of the present utility model;

Fig. 3 is an isometric exploded view of the present utility model;

Three-dimensional view when Fig. 4 takes off panel for the utility model;

Fig. 5 A is the front view of the utility model focusing lens;

Fig. 5 B is the incident area distribution plan of the utility model focusing lens;

Fig. 6 is the three-dimensional view of the utility model signal deviation plate;

The sectional view of Fig. 7 for being done along the 7-7 line among Fig. 6;

Fig. 8 is a best optical arrangement synoptic diagram of the present utility model; And

Fig. 9 is the synoptic diagram of the utility model detecting angle.

See also Fig. 2, Fig. 3, and shown in Figure 4, the ultrared sensing device includes a holder 10, an and ball 20.Have a fulcrum on this holder 10 and insert, sleeve 11 is rotated in the horizontal axis direction for sleeve 11.

This body 20 includes a base portion 21 and a panel 22, and 11 in base portion 21 and sleeve have a rotating mechanism 23, and this rotating mechanism 23 can make body 20 rotate in the vertical axis direction, for the user ultrared sensing device is adjusted to the optimum position.Base portion 21 inside can hold a support plate 30, and the plane, outer edge of this support plate 30 is extended with several blocking parts 31 to both sides, so that first circuit board 32 and second circuit board 33 are subjected to the clamping of blocking part 31 and are installed on the grip block 30.

Be loaded with each element of detecting input processing circuit on first circuit board 32 and the second circuit board 33 (being known technology), the detecting input processing circuit includes infrared ray and detects element 34, infrared ray detects element 34 and can be any known thermoelectric element, and circuit adjusting gear 24, this circuit adjusting gear 24 is to be configured on the first circuit board 32, there are two adjustment screws 25 to penetrate from panel 22 bottoms and combine, the circuit of first circuit board 32 is done test or adjust with circuit adjusting gear 24.

One signal deviation plate 40 has a pedestal 41 and a reflector elements 42.This pedestal 41 is provided with a hole 43 and can be inserted in to detect on the element 34 and forms combination, and it is to be placed on the hole 36 of first circuit board 32 that the auspicious face of pedestal 41 is provided with two angles 47, so that signal deviation plate 40 is combined on the first circuit board 32.

Panel 22 has a window 26, is provided with one in the medial margin of window 26 and embeds ditch 27, focusing lens 28 is placed in embeds in the ditch 27, and its lateral margin 29 is to be fitted in window 26 edges, makes focusing lens 28 be being configured on the panel 22 of arcuation.

See also shown in Fig. 5 A, the 5B, the inboard of this focusing lens 28 is a shiny surface, and its outside has incident mirror 28a, 28b, 28c, the 28d that several cut apart aspect, and each incident mirror 28a, 28b, 28c, 28d all have the focus under it.This focusing lens 28 is to be placed in the place ahead that infrared ray detects element 34, and is positioned at the focal position that detects element 34.This focusing lens 28 is f=31mm with the focusing distance that detects element 34.

Several incident mirrors 28a, 28b are with up and down arrangement mode setting, and it can converge the infrared rays of 120 degree with interior incident, and the infrared ray that makes incident directly is projeced into the affiliated focus of incident mirror 28a, 28b separately in detecting element 34 in fixing angle.

Incident mirror 28c, 28d are with arrangement mode setting up and down, and be disposed at the both sides of incident mirror 28a, 28b respectively, its length is approximately greater than incident mirror 28a, 28b 2.5 times, it can converge in the affiliated focus of incident mirror 28c, 28d for the infrared ray greater than 120 degree incidents, focus is Ea under the incident mirror 28c, can be for the infrared ray projection of remote incident; And focus is Eb under the incident mirror 28d, can be for the infrared ray projection of closely incident.So incident mirror 28c, 28d utilize single-point focusing principle and increased area to make focus energy with lifting, make the infrared ray penetrated do the most effective converging and be projeced into signal deviation plate 40, reflect again in detecting element 34.

See also Figure 6 and Figure 7, the reflector elements 42 of signal deviation plate 40 has an interface end 44, and is formed with symmetrical reflector elements with interface end 44 as interphase, is divided into an obtuse angle each other mutually.Reflector elements 42 is to illustrate with a side structure, and it has four planes of reflection 50,51,52,53, and the plane of reflection 50 is adjacent with interface end 44; The plane of reflection 51 be positioned at the plane of reflection 50 belows and with adjacent; The plane of reflection 52 is to be positioned at the plane of reflection 50 tops and adjacent with it, and the end portion of this plane of reflection 52 is adjacent with the end portion of the plane of reflection 51; The plane of reflection 53 is to be positioned at the plane of reflection 52 tops and adjacent with it.Each plane of reflection 50,51,52,53 is divided into an obtuse angle each other mutually.Be formed with a V-notch 54 between the plane of reflection 52,53 that two components are opened.

Because, reflector elements 42 respectively has four planes of reflection at left and right sides, make its can compensate the ultrared sensing device about greater than 60 the degree the detecting angles, so the ultrared sensing device is in the detecting angle of original 110 degree to 120 degree, the compensatory reflex face of each 40 degree about having increased makes this creation obtain the above reconnaissance range of nearly 200 degree.The incident mirror 28c, the 28d that this kind are had the reflector elements 42 collocation focusing lens of super wide-angle detecting angle converge the increase of infrared ray area, and the lifting focus energy, and then obtain the highest optical gain, and reach the above reflection of 200 degree, and can eliminate dead detecting angle.

Seeing also shown in Figure 8 is to be best optical arrangement synoptic diagram of the present utility model, and the detection area that infrared ray detects element 34 is e1, so the infrared ray of the incident of eight firing angles between S1 to S2 is directly to receive by detecting element 34.If incident angle is during greater than regional e1, then come receiving infrared-ray signal by signal deviation plate 40, illustrate, the infrared ray S3 of incident (140 degree) focuses on via single-point Ea, the Eb of focusing lens 28c, 28d and is projeced into the plane of reflection 51 and reflexes to and detect element 34, in like manner, the infrared ray S4 of incident (150 degree) focuses on via focus Ea, Eb and is projeced into the plane of reflection 50 and reflexes to and detect element 34; The infrared ray S5 of incident (160 degree) assembles via focus Ea, Eb and is projeced into the plane of reflection 52 and reflexes to and detect element 34: the infrared ray S6 of incident (170 degree) focuses on via focus Ea, Eb and is projeced into the plane of reflection 53 and reflexes to and detect element 34; So, the utility model can be promoted greater than above detecting sensitivity and the angle of 120 degree.

Because, each design of the both sides of the utility model signal deviation plate 40 has the plane of reflection 50,51,52,53 of four faces, and the angle of each plane of reflection is 10 degree spaces, therefore focusing lens 28 focuses on each plane of reflection and is projeced into infrared ray and detects element 34 scope about 10 degree is all arranged, and makes signal deviation plate 40 have the above reconnaissance range of 200 degree.

So, the utility model utilizes many planes single-point focusing principle, make infrared ray in the incident of different angles institute be incident upon on the catoptron that single-point focuses on, reflex to again via the plane of reflection of signal deviation plate and to detect element, make four planes of reflection obtain due detecting sensitivity, and obtain best sensitivity and bigger detecting angle, and four planes of reflection are different from a plane of reflection, a plane of reflection only can be detected a fixed area angle, so dead angle area will strengthen, as shown in Figure 1.And four planes of reflection of the utility model will not have this dead angle shortcoming, the detecting characteristic that detects element can be brought into play to the limit, shown in the detecting angle synoptic diagram of Fig. 9.

Claims (4)

1. the ultrared sensing device with super wide-angle detecting angle is characterized in that, includes:

One holder;

One body is to combine with this holder;

One circuit board arrangement is to be configured in body interior, is loaded with each element of detecting input processing circuit on it, and this detecting input processing circuit includes infrared ray and detects element;

One assembles eyeglass, be device on body, and be positioned at this place ahead that detects element and focal position thereof, it can focus on the infrared ray of incident; And

One signal deviation plate is to detect combination of elements with this and be placed on the circuit board arrangement, and it has the reflector elements of one group of symmetrical structure, and every group of reflector elements has the plane of reflection more than two or two.

2. the ultrared sensing device with super wide-angle detecting angle according to claim 1 is characterized in that wherein this focusing lens has several incident mirrors of cutting apart aspect, the focus under this incident mirror all has.

3. the ultrared sensing device with super wide-angle detecting angle according to claim 1 is characterized in that wherein this symmetrical reflector elements is divided into an obtuse angle each other mutually.

4. the ultrared sensing device with super wide-angle detecting angle according to claim 2, it is characterized in that, wherein two side rearview mirrors of this focusing lens can converge the infrared ray greater than 120 degree incidents, this two side rearview mirror further includes the catoptron that is arranged above and below, and catoptron has its affiliated focus up and down.

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