CN2807277Y

CN2807277Y - Reflecting mirror with improved structure

Info

Publication number: CN2807277Y
Application number: CNU2005201088980U
Authority: CN
Inventors: 龙定华
Original assignee: YUCHEN ELECTRONIC DEVELOPMENT Co Ltd
Current assignee: YUCHEN ELECTRONIC DEVELOPMENT Co Ltd; Everspring Industry Co Ltd
Priority date: 2005-06-09
Filing date: 2005-06-09
Publication date: 2006-08-16
Anticipated expiration: 2015-06-09

Abstract

The utility model provides a reflecting mirror with an improved structure which is suitable for being used with a sensor. The reflecting mirror has at least one oval curved face; the oval curved face is provided with a first focus and a second focus; an induction area of the sensor is arranged on the second focus. Hence, the oval curved face has the property of double focuses; luminous rays radiated from all the directions are reflected to the second focus through the reflection of the oval curved face after passing through the first focus of the oval curved face, and are received by the sensor; in this way, the inducting range of the sensor is larger than 180 DER.

Description

Improve the catoptron of structure

Technical field

The utility model relates to a kind of catoptron, particularly a kind of catoptron that increases the improvement structure of sensor investigative range.

Background technology

The electronic component that is most commonly used to survey human body on the market is that heat is released infrared sensor (Pyroelectric Infrared Sensor), utilizes its characteristic, and we can realize many application.Wherein the highest with the degree that antitheft equipment was utilized, find energy distribution density with before to some extent during difference when sensor, sensor will produce a signal and lamp is lighted, or opening warning horn reaches antitheft effect.

At present, the most products that use passive infrared (PIR) to survey human body all are to converge the infrared ray that human body gives out by the lens arra that high density polyethylene (HDPE) material is made, the infrared ray that is converged can pass through a mirror reflects, and injects in the induction zone of sensor.

A kind of detector (DETECTOR WITH 180 DETECTING RANGE) with 180 degree investigative ranges has been proposed in the United States Patent (USP) the 5103346th, it discloses a kind of signal reflector (signal deflector), this catoptron has the reflecting surface of a plurality of plane configurations, but this kind catoptron is except the shortcoming that is limited in scope with covering, because the angle difference of incident ray, the therefore position that must calculate reflection spot.

In addition, a kind of detector (DETECTOR WITH WIDE DETECTING RANGE) with wide investigative range has been proposed in the United States Patent (USP) the 6653635th, it discloses a kind of catoptron, reflector element (reflecting units) with a plurality of balanced configurations, and the infrared ray of incident converges by the lens (lens) that use has single focal length, ultrared incident path is respectively S3, S4, S5 and S6, but all by the incident of Es point, though this catoptron has solved the different problem of incident angle, the ultrared energy that is converged but can't reach the most concentrated state.

The utility model content

Therefore, the purpose of this utility model is to provide a kind of catoptron that improves structure, and this catoptron can use with sensor collocation, in order to increase the induction range of sensor.

Based on above-mentioned purpose, the utility model provides a kind of catoptron that improves structure, this catoptron is applicable to the light by all directions incident is reflexed on the sensor, wherein catoptron has at least one oval calotte, this oval calotte has one first focus and one second focus, and the induction zone of sensor is disposed on this second focus, by the light of all directions incident by after first focus of oval calotte, reflection directive second focus by oval calotte, thereby receive by sensor, can make the induction range of sensor surpass 180 degree thus.

Therefore, catoptron according to improvement structure of the present utility model has following advantage, promptly, owing to adopt the catoptron of oval calotte, when being used in human body infrared detection, the scope of its detection can comprise that the place ahead, below, the left and right sides and the rear, the sensor left and right sides etc. of sensor locate, and its induction range can surpass 180 degree; Owing to adopt the catoptron of oval calotte, for the deviser, if one of them focus of aiming oval calotte, the position that need not calculate reflection spot, so can save the time of design; Owing to adopt the catoptron of oval calotte, even if the angle of incident light difference can be calculated the radius-of-curvature of required lens at each point of each angle, to reach optimization.

Description of drawings

Fig. 1 is the synoptic diagram of expression long axis of ellipse, minor axis and focal length.

Fig. 2 is the synoptic diagram of light by oval bifocal light path.

Fig. 3 is according to the arrange in pairs or groups three-dimensional structure diagram of a sensor of the catoptron with single oval calotte of the present utility model.

Fig. 4 is according to the arrange in pairs or groups side view of a sensor of the catoptron with single oval calotte of the present utility model.

Fig. 5 is according to the arrange in pairs or groups three-dimensional structure diagram of a sensor of the catoptron with a plurality of oval calottes of the present utility model.

Embodiment

Relevant preferred embodiment of the present utility model and technology contents, existing accompanying drawings is as follows:

At first, see also Fig. 1 and Fig. 2, oval shape depends on the length of major axis 2a, minor axis 2b and focal length c, and its relational expression is c ²+ b ²=a ²It should be noted that, ellipse has a characteristic, promptly, has bifocus f1, f2, light that sends from arbitrary focus or sound wave are after reflection, be bound to by another focus, so as an energy centralization system, with energy centralization on first focus the time, therefore it will converge on another focus by reflection, this specific character can be applied on the passive infrared sensor (PIR SENSOR), will be not be entered the induction zone of passive infrared sensor by what passive infrared sensor covered by mirror reflects of the present utility model by the infrared ray that human body produced.

See also Fig. 3 and Fig. 4, catoptron 10 of the present utility model is suitable for using with a sensor 20 (releasing infrared sensor as heat) collocation, in order to being reflexed on the induction zone 22 of this sensor 20 by the light (as infrared ray) of all directions incident in the present embodiment.Catoptron 10 has an oval calotte 12, and this oval calotte 12 has one first focus 14 and one second focus 16, and the induction zone 22 of the sensor 20 is configured on second focus 16.

Owing to pass the bifocus characteristic of the oval calotte 12 of catoptron 10, therefore by the light of all directions incident by after first focus 14 of oval calotte 12, pass through reflection directive second focus 16 of oval calotte 12 again, thereby the induction zone 22 by sensor 20 receives, and can make the induction range of sensor 20 surpass 180 degree thus.

See also Fig. 5, in the present embodiment, catoptron 10 has a plurality of oval calottes 12, these oval calottes 12 respectively have one first focus 14 and second an identical focus 16, and the induction zone 22 of the sensor 20 is configured on second focus 16, similarly, by the light of all directions incident by after first focus 14 of each oval calotte 12, pass through the second common focus 16 of reflection directive of these oval calottes 12 again, thereby receive by the induction zone 22 of sensor 20.In other words, when the oval calotte 12 with catoptron 10 is set to a plurality of oval calotte, second focus 16 of these oval calottes 12 is designed to coincide with a bit.

In sum, the catoptron according to improvement structure of the present utility model has following advantage at least:

1, owing to adopt the catoptron of oval calotte, when being used in human body infrared detections, the scope of its detection can comprise that the place ahead, below, the left and right sides and the rear, the sensor left and right sides etc. of sensor locate, and its induction range can surpass 180 and spend.

2, owing to adopt the catoptron of oval calotte, for the deviser, if one of them focus of aiming oval calotte, the position that need not calculate reflection spot, so can save the time of design.

3, owing to adopt the catoptron of oval calotte, even if the angle of incident light difference can be calculated the radius-of-curvature of required lens at each point of each angle, to reach optimization.

The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. a catoptron that improves structure is suitable for the light by all directions incident is reflexed on the sensor (20), in order to increase the induction range of described sensor (20), it is characterized in that:

Described catoptron (10) has at least one oval calotte (12), described oval calotte (12) has one first focus (14) and one second focus (16), and the induction zone (22) of described sensor (20) is configured on described second focus (16), by the light of all directions incident by described first focus (14) after, by described second focus of the reflection directive of described oval calotte (12) (16), thereby receive by described sensor (20).

2. the catoptron of improvement structure according to claim 1 is characterized in that, the light of described incident is infrared ray, and described sensor (20) is released infrared sensor for heat.

3. the catoptron of improvement structure according to claim 1 is characterized in that, when the oval calotte (12) with described catoptron (10) is set to when a plurality of, second focus (16) of described oval calotte (12) overlaps.