JPH0525032Y2 - - Google Patents
Info
- Publication number
- JPH0525032Y2 JPH0525032Y2 JP15873287U JP15873287U JPH0525032Y2 JP H0525032 Y2 JPH0525032 Y2 JP H0525032Y2 JP 15873287 U JP15873287 U JP 15873287U JP 15873287 U JP15873287 U JP 15873287U JP H0525032 Y2 JPH0525032 Y2 JP H0525032Y2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- heat ray
- heat
- light emitting
- focal point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Description
【考案の詳細な説明】
本考案は例えば人体から放射される熱線を検知
して警報を発する防犯装置あるいは上記熱線によ
りドアの自動開閉を行う装置等に用いることので
きる熱線感知器に関する。[Detailed Description of the Invention] The present invention relates to a heat ray sensor that can be used, for example, in a security device that detects heat rays emitted from a human body and issues an alarm, or in a device that automatically opens and closes a door using the heat rays.
このような装置においては、機器の製作あるい
は取付保守等に際して熱線の検知される角度範囲
すなわち装置の視野を確認する必要がある。従つ
て従来はこの作業に際し、レンズで集束した熱線
を電気信号に変換して検出するための、例えば焦
電型熱線検知素子の位置に小型電球あるいは発光
ダイオード等の発光素子を配置し、前方からレン
ズを透してその光線を確認し得る範囲を検出して
いた。しかしこのために熱線検知素子を装置から
取り外して、その位置に上記発光素子を配置しな
ければならないが、検知素子は大形のプリント配
線板に組み込まれていることが多いから素子のみ
の着脱、あるいは配線板全体の着脱が何れにして
も極めて困難である。従つて本考案はこのように
困難な着脱操作を必要とすることなく、装置の視
野を容易でしかも正確に検出することのできる熱
線感知器を提供するものである。 In such a device, it is necessary to confirm the angular range in which hot rays are detected, that is, the field of view of the device, when manufacturing, installing, and maintaining the device. Therefore, conventionally, when performing this work, a light emitting element such as a small light bulb or a light emitting diode was placed at the position of the pyroelectric heat ray detection element to convert the heat rays focused by the lens into electrical signals and detect them. The area where the rays of light could be seen through the lens was detected. However, for this purpose, the heat ray detection element must be removed from the device and the light emitting element described above must be placed in its place.However, since the detection element is often built into a large printed wiring board, it is necessary to remove and attach only the element. Alternatively, it is extremely difficult to attach and detach the entire wiring board. Therefore, the present invention provides a heat ray sensor that can easily and accurately detect the field of view of the device without requiring such difficult attachment/detachment operations.
本考案は例えば合成樹脂のフレネルレンズある
いは凹面反射鏡等適宜の熱線集束レンズとこのレ
ンズの焦点を一方の焦点とする楕円反射鏡とを設
けて、その楕円反射鏡の他方の焦点またはこの焦
点を通つた熱線が更に焦点を結ぶ位置、従つて実
質的に上記焦点位置に熱線検知素子を配置し、前
記焦点に視野検出用の発光素子を着脱自在に配置
するようにしたものである。従つて視野の検出等
に際して、着脱の困難なプリント配線板等を移動
することにより、その位置に発光素子を配置する
等の困難な作業を必要としないと共に適宜の発光
素子、例えば小型軽量な発光ダイオード等を上記
焦点とその側部の光路外との間で移動し得るよう
に設置することにより極めて容易で、しかも正確
に視野の検出を行い得る。かつ前記楕円反射鏡に
よつて、熱線検知素子自体の視野角を実効的に拡
大することができるから、装置の内部における光
路長を短縮して、熱線感知器を小型に製作するこ
とができる等の作用効果がある。 The present invention includes an appropriate heat ray focusing lens such as a synthetic resin Fresnel lens or a concave reflector, and an elliptical reflector whose one focus is the focal point of the lens, and the other focus of the elliptical reflector or this focus. A heat ray detection element is disposed at a position where the passing heat rays are further focused, that is, substantially at the above focal point position, and a light emitting element for visual field detection is detachably disposed at the focal point. Therefore, when detecting the field of view, etc., by moving a printed wiring board etc. that is difficult to attach or remove, there is no need for difficult work such as placing a light emitting element in that position, and an appropriate light emitting element, such as a small and lightweight light emitting element, can be used. By installing a diode or the like so that it can be moved between the focal point and the side outside the optical path, the field of view can be detected very easily and accurately. In addition, since the elliptical reflecting mirror can effectively expand the viewing angle of the heat ray detection element itself, the optical path length inside the device can be shortened and the heat ray detector can be made smaller. It has the function and effect of
図面は本考案の一実施例を示した光学系で、熱
線集束レンズ1はこれを合成樹脂のフレネルレン
ズあるいは凹面反射鏡等によつて構成することも
できるが、その焦点Pの位置に例えば発光ダイオ
ード等の発光素子2を配置してある。この素子は
軸3により鎖線のように回動して光路外へ移動さ
せることができるように取り付けられている。ま
た上記焦点Pを通つて熱線が入射する楕円反射鏡
4を設けてあるが、この反射鏡は一対の焦点の一
方が前記焦点Pと一致するように固定されてい
る。その反射鏡4の他方の焦点Qに、この反射鏡
で集束された熱線が入射するように例えば焦電型
等適宜の熱線検知素子5を配置したものである。
なおこの装置は直線PQがレンズ1の軸と直交す
るように形成してあるが、この角度は任意に選定
することができる。 The drawing shows an optical system showing an embodiment of the present invention, and the heat ray converging lens 1 may be constructed of a synthetic resin Fresnel lens or a concave reflecting mirror. A light emitting element 2 such as a diode is arranged. This element is mounted on a shaft 3 so that it can be rotated as shown by the chain line and moved out of the optical path. Further, an elliptical reflecting mirror 4 through which the heat rays are incident through the focal point P is provided, and this reflecting mirror is fixed so that one of the pair of focal points coincides with the focal point P. A suitable heat ray detection element 5, such as a pyroelectric type, is arranged so that the heat rays focused by the reflector 4 are incident on the other focal point Q of the reflector 4.
Although this device is formed so that the straight line PQ is perpendicular to the axis of the lens 1, this angle can be selected arbitrarily.
上記装置において、発光素子2を実線のように
焦点Pに配置すると、この素子の光線が入射光線
と同一の光路を逆向きに進行してレンズ1の前方
に投射される。従つてその光線の投射範囲から上
記レンズを観察すると、このレンズが発光ダイオ
ードの発生する光の色に輝いて見えるが、上記範
囲を外れるとレンズが暗黒に観察される。すなわ
ちこの観察により熱線感知器の視野を容易に確認
して装置の設定を行い得る。つぎに発光素子2を
鎖線位置に移動させると、レンズ1を通つた熱線
が素子5で検出されるから、前記範囲すなわち視
野内に人等が侵入すると、この素子から出力が送
出されて、警報等が発せられる。かつ反射鏡4と
して楕円反射鏡を用い、その両焦点にレンズ1の
焦点と熱線検知素子5とを配置するから、これを
レンズ1の軸に対して適当な角度で配置すること
により、素子5に入射する熱線の集束角αをレン
ズ1の集積角βより小さくすることができる。従
つて熱線検知素子5の視野角に制限されることな
く、レンズ1の集束角βを大きくして、装置を小
型に形成し得る等の効果もある。 In the above device, when the light emitting element 2 is placed at the focal point P as shown by the solid line, the light ray of this element travels in the opposite direction along the same optical path as the incident light ray and is projected in front of the lens 1. Therefore, when the lens is observed from the projection range of the light beam, the lens appears to shine with the color of the light generated by the light emitting diode, but when the lens is outside the above range, the lens appears dark. That is, by this observation, the field of view of the heat ray sensor can be easily confirmed and the device settings can be made. Next, when the light emitting element 2 is moved to the position indicated by the chain line, the heat rays passing through the lens 1 are detected by the element 5, so when a person or the like enters the range, that is, the field of view, an output is sent from this element and an alarm is sent out. etc. are issued. In addition, since an elliptical reflecting mirror is used as the reflecting mirror 4, and the focal point of the lens 1 and the heat ray detection element 5 are arranged at both focal points, by arranging this at an appropriate angle with respect to the axis of the lens 1, the element 5 The convergence angle α of the heat rays incident on the lens 1 can be made smaller than the convergence angle β of the lens 1. Therefore, the convergence angle β of the lens 1 can be increased without being limited by the viewing angle of the heat ray detection element 5, and the device can be made smaller.
図面は本考案実施例の構成を示した図である。
なお図において、1は熱線集束レンズ、2は発光
素子、3は素子2の回動軸、4は惰性反射鏡、5
は熱線検知素子である。
The drawings are diagrams showing the configuration of an embodiment of the present invention.
In the figure, 1 is a heat ray focusing lens, 2 is a light emitting element, 3 is a rotation axis of element 2, 4 is an inertial reflector, and 5
is a heat ray detection element.
Claims (1)
一方の焦点とする楕円反射鏡と、上記楕円反射鏡
における他方の焦点に配置されて前記焦点に集束
した熱線が上記楕円反射鏡で反射して入射する熱
線検知素子と、前記熱線レンズの焦点に着脱自在
に配置してこのレンズにより可視光線を前記熱線
と逆向きに前方へ投射する発光素子とよりなる熱
線感知器。 A heat ray lens that focuses heat rays on one point, an elliptical reflector that has the above point as one focus, and a heat ray lens that is arranged at the other focus of the ellipse reflector so that the heat rays that are focused at the focal point are reflected by the ellipse reflector. A heat ray sensor comprising an incident heat ray detection element and a light emitting element which is detachably arranged at the focal point of the heat ray lens and projects visible light forward in the opposite direction to the heat rays through the lens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15873287U JPH0525032Y2 (en) | 1987-10-19 | 1987-10-19 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15873287U JPH0525032Y2 (en) | 1987-10-19 | 1987-10-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0164790U JPH0164790U (en) | 1989-04-25 |
JPH0525032Y2 true JPH0525032Y2 (en) | 1993-06-24 |
Family
ID=31439323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15873287U Expired - Lifetime JPH0525032Y2 (en) | 1987-10-19 | 1987-10-19 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0525032Y2 (en) |
-
1987
- 1987-10-19 JP JP15873287U patent/JPH0525032Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0164790U (en) | 1989-04-25 |
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