JPH049558Y2 - - Google Patents
Info
- Publication number
- JPH049558Y2 JPH049558Y2 JP10989784U JP10989784U JPH049558Y2 JP H049558 Y2 JPH049558 Y2 JP H049558Y2 JP 10989784 U JP10989784 U JP 10989784U JP 10989784 U JP10989784 U JP 10989784U JP H049558 Y2 JPH049558 Y2 JP H049558Y2
- Authority
- JP
- Japan
- Prior art keywords
- concave mirror
- infrared
- concave
- view
- infrared detector
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Burglar Alarm Systems (AREA)
Description
【考案の詳細な説明】
「産業上の利用分野」
本考案は侵入警報等に使用するデユアル形式の
受動型赤外線検知装置の構造に関するものであ
る。[Detailed Description of the Invention] "Field of Industrial Application" The present invention relates to the structure of a dual-type passive infrared detection device used for intrusion alarms and the like.
「従来の技術」
第2図は従来のデユアル形式の受動型赤外線検
知装置の要部平面図、第3図は凹面鏡の視野を示
す図である。``Prior Art'' FIG. 2 is a plan view of essential parts of a conventional dual-type passive infrared detection device, and FIG. 3 is a view showing the field of view of a concave mirror.
1はデユアル形式の赤外線検知器、2は複合凹
面鏡であり、複数設けた凹面鏡A,B,C,D,
Eから構成されている。 1 is a dual-type infrared detector, 2 is a composite concave mirror, and multiple concave mirrors A, B, C, D,
It is composed of E.
凹面鏡A〜Eはそれぞれの凹面鏡視野SA,
SB,SC,SD,SEからの赤外線を反射して赤外
線検知器1の検知素子a及びb上に焦点を結ぶよ
うに配置されている。 Concave mirrors A to E have respective concave mirror fields of view SA,
They are arranged so that the infrared rays from SB, SC, SD, and SE are reflected and focused on the detection elements a and b of the infrared detector 1.
検知素子a,bの出力は互いに差動的に合成さ
れ、検知素子a,bの赤外線入射に差異のある時
に出力するようになつている。 The outputs of the sensing elements a and b are differentially combined with each other, and are output when there is a difference in the incidence of infrared rays on the sensing elements a and b.
第3図に示す凹面鏡視野SA〜SEはそれぞれ検
知素子a,bを起点とする2本1対の視野から成
立つていて、この視野が感熱帯となつている。 The concave mirror visual fields SA to SE shown in FIG. 3 each consist of a pair of visual fields starting from the sensing elements a and b, and this visual field is the sensitive zone.
4は赤外線検知器1と複合凹面鏡2を含む赤外
線検知装置で、凹面鏡視野SA〜SEを人間等赤外
線源が横切れば赤外線検知装置4は赤外線を検知
して出力し、人間等の物体を感知する。 4 is an infrared detection device including an infrared detector 1 and a compound concave mirror 2. When an infrared source such as a human crosses the concave mirror field of view SA to SE, the infrared detection device 4 detects and outputs infrared rays to detect an object such as a human. .
凹面鏡A〜Eで反射した赤外線は赤外線検知器
1に設けられた窓3より検知素子a,bに入射す
る。このため検知素子a,bの両方に入射できる
赤外線の範囲は窓3の端と検知素子a,bを結ぶ
線を境に制限される。 The infrared rays reflected by the concave mirrors A to E enter the detection elements a and b through a window 3 provided in the infrared detector 1. Therefore, the range of infrared rays that can be incident on both the detection elements a and b is limited by the line connecting the edge of the window 3 and the detection elements a and b.
第2図にて検知素子aから凹面鏡Aの左端に至
る直線Aaと検知素子bから凹面鏡Eの右端に至
る直線Ebがなす角度の範囲が、この赤外線検知
器1の有効検知角度である。 The effective detection angle of the infrared detector 1 is the angle range formed by the straight line Aa from the sensing element a to the left end of the concave mirror A and the straight line Eb from the sensing element b to the right end of the concave mirror E in FIG.
上記制限角度内で凹面鏡を大きくするには、赤
外線検知器1の位置を凹面鏡A〜Eから離す、す
なわち第2図のLを大きくすればよいがこれでは
装置全体が大きくなる欠点がある。 In order to increase the size of the concave mirror within the above-mentioned limited angle, the infrared detector 1 may be moved away from the concave mirrors A to E, that is, L in FIG. 2 may be increased, but this has the disadvantage that the entire device becomes large.
「考案が解決しようとする問題点」
装置全体特に凹面鏡と赤外線検知器1の距離L
を大きくすることなく凹面鏡A〜Eを大きくして
赤外線検知能力を大きくしようとするものであ
る。"Problem that the invention attempts to solve" The entire device, especially the distance L between the concave mirror and the infrared detector 1
This is intended to increase the infrared detection ability by increasing the size of the concave mirrors A to E without increasing the size of the infrared rays.
「問題点を解決するための手段」
本考案はこれらの問題を解決するために、特定
方向の凹面鏡(例えば凹面鏡C)を2分割して上
記有効検知角度のそれぞれ外側に配置し両者で一
対の感熱帯を構成することにより装置を大きくす
ることなく凹面鏡を大きくして赤外線検知能力を
高める構造としたものである。"Means for Solving the Problems" In order to solve these problems, the present invention divides a concave mirror in a specific direction (for example, concave mirror C) into two parts and places them on the outside of the effective detection angle. By configuring the sensing zone, the concave mirror can be made larger without increasing the size of the device, thereby increasing the infrared detection ability.
以下図面について詳細に説明する。 The drawings will be explained in detail below.
「実施例」
第1図は本考案の実施例を示す要部平面図であ
る。"Embodiment" FIG. 1 is a plan view of the main part showing an embodiment of the present invention.
1は前述のデユアル形式の赤外線検知器で2つ
の検知素子a,bを持つている。2′は複合凹面
鏡で凹面鏡C1,A′,B′,D′,E′,C2により
構成されている。A′a,E′b,I,mは検知素子
a,bと赤外線検知器1の窓3の端とを結ぶ直線
であつて、直線A′a,E′b間は検知素子a,b共
通に赤外線が入射できる範囲であり、前述した有
効検知角度である。直線A′a,I間は凹面鏡C1
から反対側の検知素子bのみに、直線E′b,mの
間は凹面鏡C2から反対側の検知素子aのみに赤
外線が入射できる範囲であり、従来は利用されて
いなかつた。 1 is the aforementioned dual-type infrared detector having two detection elements a and b. 2' is a composite concave mirror, which is composed of concave mirrors C1, A', B', D', E', and C2. A'a, E'b, I, m are straight lines connecting the detection elements a, b and the edge of the window 3 of the infrared detector 1, and between the straight lines A'a, E'b, the detection elements a, b This is the range where infrared rays can commonly be incident, and is the effective detection angle described above. Concave mirror C1 between straight lines A'a and I
The range between the straight line E'b and m is a range in which infrared rays can be incident only on the sensing element b on the opposite side from the concave mirror C2, and has not been used in the past.
こゝで凹面鏡C1とC2は両者で1対の同一視
野を持つように調整され、例えば第3図の視野
SCと略同じである。又凹面鏡A′,B′,D′,E′は
凹面鏡A,B,D,Eの視野SA,SB,SD,SE
と同じ視野を持つている。 Here, the concave mirrors C1 and C2 are adjusted so that they both have a pair of identical fields of view, for example the field of view in Figure 3.
Almost the same as SC. Also, concave mirrors A', B', D', and E' are the fields of view SA, SB, SD, and SE of concave mirrors A, B, D, and E.
have the same perspective.
直線A′aと直線E′bのなす角度が赤外線検知器
1に有効検知角度であつて第2図では5個の凹面
鏡が配置されたのに対し本実施例では4個であつ
てそれだけ個々の凹面鏡は大きくなつている。凹
面鏡C1,C2は前記有効検知角度外に配置され
ているが、それぞれ反対側の検知素子上に焦点を
結ばせることにより1対の同一視野を作り有効に
作用させることができる。 The angle formed by the straight line A'a and the straight line E'b is the effective detection angle for the infrared detector 1. In contrast to the five concave mirrors arranged in FIG. The concave mirror of is getting larger. Although the concave mirrors C1 and C2 are arranged outside the above-mentioned effective detection angle, by focusing each on the detection element on the opposite side, a pair of identical fields of view can be created and used effectively.
凹面鏡と赤外線検知器1の距離Lは第2図の場
合と同じであつて、装置を大きくすることなく凹
面鏡を大きくすることができる。 The distance L between the concave mirror and the infrared detector 1 is the same as in the case of FIG. 2, and the concave mirror can be made larger without increasing the size of the device.
「作用」
第3図における赤外線検知装置4に含まれる複
合凹面鏡2を第1図の複合凹面鏡2′に置きかえ
ても、同様の視野が生じる。"Operation" Even if the compound concave mirror 2 included in the infrared detecting device 4 in FIG. 3 is replaced with the compound concave mirror 2' in FIG. 1, a similar field of view is produced.
すなわち、凹面鏡視野SA〜SEの中に人体等赤
外線源が侵入すれば検知素子a,b上の赤外線量
が変動し、赤外線検知器1はその差異に応じて出
力を生じ人体の存在や移動を検知することができ
る。 That is, if an infrared source such as a human body enters the concave mirror field of view SA to SE, the amount of infrared rays on detection elements a and b will change, and infrared detector 1 will generate an output according to the difference to detect the presence or movement of a human body. Can be detected.
「考案の効果」
以上説明したように本考案によれば特定方向の
凹面鏡を2分割して複合凹面鏡の両端に配置する
ことにより、装置を大きくすることなく凹面鏡を
大きくして赤外線検知能力を増大することができ
る。この結果赤外線検知装置を高感度にすること
が可能である。"Effect of the invention" As explained above, according to the invention, by dividing the concave mirror in a specific direction into two and placing them at both ends of the compound concave mirror, the concave mirror can be made larger without increasing the size of the device, increasing infrared detection capability. can do. As a result, it is possible to make the infrared detection device highly sensitive.
第1図は本考案の実施例を示す要部平面図、第
2図は従来のデユアル形式の受動型赤外線検知装
置、第3図は凹面鏡の視野を示す図である。
1……赤外線検知器、2,2′……複合凹面鏡、
A,B,C,D,E,A′,B′,D′,E′,C1,
C2……凹面鏡、3……窓、4……赤外線検知装
置、SA,SB,SC,SD,SE……凹面鏡視野、
Aa,Eb,A′a,E′b,I,m……直線。
FIG. 1 is a plan view of essential parts showing an embodiment of the present invention, FIG. 2 is a conventional dual-type passive infrared detection device, and FIG. 3 is a view showing the field of view of a concave mirror. 1...Infrared detector, 2,2'...Compound concave mirror,
A, B, C, D, E, A', B', D', E', C1,
C2...Concave mirror, 3...Window, 4...Infrared detection device, SA, SB, SC, SD, SE...Concave mirror field of view,
Aa, Eb, A'a, E'b, I, m...straight line.
Claims (1)
に対応する方向の赤外線を各凹面鏡のほぼ共通し
た焦点位置に置かれたデユアル形式の赤外線検知
器で検知する装置において、特定方向に対応する
凹面鏡を2分割して、それぞれの凹面鏡を前記赤
外線検知器の有効検知角度の外側に配置するとと
もに両者で一対の感熱帯を構成するようにしたこ
とを特徴とする受動型赤外線検知装置。 In an apparatus in which a plurality of concave mirrors with different viewing directions are provided and infrared rays in a direction corresponding to each concave mirror are detected by a dual-type infrared detector placed at a substantially common focal position of each concave mirror, two concave mirrors corresponding to a specific direction are detected. A passive infrared detection device characterized in that the concave mirrors are divided and each concave mirror is placed outside the effective detection angle of the infrared detector, and both constitute a pair of sensitive areas.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10989784U JPS6126135U (en) | 1984-07-20 | 1984-07-20 | Passive infrared detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10989784U JPS6126135U (en) | 1984-07-20 | 1984-07-20 | Passive infrared detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6126135U JPS6126135U (en) | 1986-02-17 |
JPH049558Y2 true JPH049558Y2 (en) | 1992-03-10 |
Family
ID=30669031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10989784U Granted JPS6126135U (en) | 1984-07-20 | 1984-07-20 | Passive infrared detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6126135U (en) |
-
1984
- 1984-07-20 JP JP10989784U patent/JPS6126135U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6126135U (en) | 1986-02-17 |
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