JPH0652452A - Heat ray type detector - Google Patents
Heat ray type detectorInfo
- Publication number
- JPH0652452A JPH0652452A JP20134192A JP20134192A JPH0652452A JP H0652452 A JPH0652452 A JP H0652452A JP 20134192 A JP20134192 A JP 20134192A JP 20134192 A JP20134192 A JP 20134192A JP H0652452 A JPH0652452 A JP H0652452A
- Authority
- JP
- Japan
- Prior art keywords
- heat ray
- visible light
- heat
- light source
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 239000004698 Polyethylene Substances 0.000 claims abstract description 4
- -1 polyethylene Polymers 0.000 claims abstract description 4
- 229920000573 polyethylene Polymers 0.000 claims abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ゾーンロケータ機能を
備える熱線式検知器の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a heat ray type detector having a zone locator function.
【０００２】[0002]
【従来の技術】熱線式検知器には、検知領域から入射し
て来る熱線をセンサ回路の熱線感知素子に収束させてお
き、該熱線量が変化すると該変化に応じた電圧を熱線感
知素子から出力させて、該出力電圧が所定レベル以上で
あれば発報出力するようにした受動型熱線式検知器があ
る。このような受動型熱線式検知器には、１台の熱線式
検知器で複数の異なった検知領域を備える、複数検知領
域型のものがある。2. Description of the Related Art In a heat ray type detector, heat rays incident from a detection area are converged on a heat ray sensing element of a sensor circuit, and when the heat dose changes, a voltage corresponding to the change is applied from the heat ray sensing element. There is a passive hot-wire detector that outputs an alarm and outputs an alarm if the output voltage is above a predetermined level. As such a passive heat ray type detector, there is a multi-detection area type in which one heat ray type detector is provided with a plurality of different detection areas.
【０００３】このような複数検知領域型の熱線式検知器
の設置時にあっては、検知領域の設定調節を行うもの
の、狙い通りの設定が成されていないと、本来発報しな
ければならないのに発報しないと言う失報を生じたり、
本来発報してはならないのに発報してしまうと言う誤報
を生じたりする。そこで、正確な検知領域の設定調節を
可能にして、上述のような失報や誤報を生じないように
するための、ゾーンロケータ機能を備えた熱線式検知器
が既に考案されている。At the time of installing such a multi-detection area type hot-wire detector, although the detection area is adjusted and set, if the intended setting is not made, an alarm should be issued originally. To not be notified to,
There may be a false alarm saying that it should be issued even though it should not be originally issued. Therefore, a hot-wire type detector having a zone locator function has been already devised to enable accurate setting and adjustment of the detection area and prevent the above-mentioned false alarms and false alarms.
【０００４】図２はこのようなゾーンロケータ機能を備
える熱線式検知器の一例を説明するための要部断面図で
ある。図２において、１a,１b,１c,１d はそれぞれ収束
レンズ、２a は平面集合反射板、２b は平面反射板、３
は熱線感知素子、４はプリント配線基板、５は光源、６
は光源５を支えると共に光源５に給電するための支持
具、Ｅ1,Ｅ2,Ｅ3 は検知領域の確認作業者の目の位置、
Ａ，Ｂ，…は検知領域を示している。収束レンズ１a は
検知領域Ａを形成しており、検知領域Ａからやって来る
熱線を平面集合反射板２a に反射させた後、更に平面反
射板２b に反射させ、最終的に熱線感知素子３に収束さ
せる。収束レンズ１b は検知領域Ｂからやって来る熱線
を直接熱線感知素子３に収束させる。収束レンズ１c,１
d についても同様である。FIG. 2 is a cross-sectional view of an essential part for explaining an example of a heat ray type detector having such a zone locator function. In FIG. 2, 1 a, 1 b, 1 c, 1 d are converging lenses, 2 a is a plane collective reflector, 2 b is a plane reflector, 3 a
Is a heat ray sensing element, 4 is a printed wiring board, 5 is a light source, and 6
Is a support for supporting the light source 5 and supplying power to the light source 5, E 1, E 2 and E 3 are the positions of the eyes of the operator who confirms the detection area,
A, B, ... Show detection areas. The converging lens 1 a forms the detection area A, and the heat rays coming from the detection area A are reflected by the plane collective reflection plate 2 a , and then further reflected by the plane reflection plate 2 b , and finally the heat ray sensing element 3 Converge to. The converging lens 1 b directly converges the heat ray coming from the detection area B onto the heat ray sensing element 3. Converging lens 1 c, 1
The same applies to d .
【０００５】ところで、熱線の収束する焦点近傍の熱線
感知素子３の前方に配設されている光源５を点灯する
と、光源５から放出される可視光は、前述の熱線の収束
経路の逆を辿ってそれぞれの収束レンズ１a,１b,１c,１
d から放出される。従って、それぞれの検知領域Ａ，
Ｂ，…の確認のためのゾーンロケータ機能を使用する場
合は、光源５を点灯させておいて、熱線式検知器を見た
とき収束レンズ１a,１b,１ c,１d を通して光源５の見え
る箇所が検知領域であると判断でき、このゾーンロケー
タ機能を用いて正確にそれぞれの検知領域Ａ，Ｂ，…が
把握でき、正確に検知領域を設定できる。By the way, the heat rays near the focus where the heat rays converge
Turn on the light source 5 disposed in front of the sensing element 3.
And the visible light emitted from the light source 5 converges the above-mentioned heat rays.
Each converging lens 1 following the reverse patha,1b,1c,1
dEmitted from. Therefore, each detection area A,
When using the zone locator function to check B, ...
In that case, I turned on the light source 5 and saw the heat ray type detector.
When convergent lens 1a,1b,1 c,1dView of light source 5 through
The zone location can be determined to be the detection area.
The respective detection areas A, B, ...
You can grasp and set the detection area accurately.
【０００６】図３はゾーンロケータ機能を備える熱線式
検知器の他の例を説明するための要部断面図であり、図
３（ａ）は検知状態を示し、図３（ｂ）は検知領域の確
認状態を示している。図３において、２a は平面集合反
射板、２b は放物面反射板、３は熱線感知素子、４はプ
リント配線基板、５は光源、Ｅ1,Ｅ2,Ｅ3 は検知領域の
確認作業者の目の位置、Ａ，Ｂ，…は検知領域を示して
いる。3A and 3B are cross-sectional views of a main part for explaining another example of the heat ray type detector having the zone locator function. FIG. 3A shows a detection state and FIG. 3B shows a detection region. Shows the confirmation state of. In FIG. 3, 2 a is a plane collective reflection plate, 2 b is a parabolic reflection plate, 3 is a heat ray sensing element, 4 is a printed wiring board, 5 is a light source, and E 1, E 2 and E 3 are detection areas. The positions of the eyes of the operator, A, B, ... Denote detection areas.
【０００７】この図３に示す熱線式検知器にあっては、
熱線感知素子３は放物面反射板２bの焦点近傍に配設さ
れており、放物面反射板２b と平面集合反射板２a とで
それぞれの検知領域Ａ，Ｂ，…を形成している。この図
３に示す熱線式検知器のゾーンロケータ機能を使用する
には、まず、図３（ａ）に示す状態から図３（ｂ）に示
す状態にする。つまり、プリント配線基板４を移動させ
て光源５を放物面反射板２b の焦点に位置させるのであ
る。その後、光源５を点灯させて熱線式検知器を見たと
き、平面集合反射板２a を介して光源５の見える箇所が
検知領域であると判断できる。そして、検知領域Ａ，
Ｂ，…の設定調節が完了すると再びプリント配線基板４
を図３（ａ）の状態に戻して熱線検知のための運用に入
るのである。In the heat ray type detector shown in FIG. 3,
The heat ray sensing element 3 is arranged in the vicinity of the focal point of the parabolic reflector 2 b , and the parabolic reflector 2 b and the flat assembly reflector 2 a form respective detection areas A, B ,. ing. In order to use the zone locator function of the heat ray detector shown in FIG. 3, first, the state shown in FIG. 3 (a) is changed to the state shown in FIG. 3 (b). That is, the printed wiring board 4 is moved to position the light source 5 at the focal point of the parabolic reflector 2 b . After that, when the light source 5 is turned on and the heat ray type detector is viewed, it can be determined that the portion where the light source 5 can be seen is the detection area through the flat collective reflector 2a . Then, the detection area A,
When the setting adjustment of B, ... Is completed, the printed wiring board 4 is again provided.
Is returned to the state of FIG. 3 (a) and operation for heat ray detection is started.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上述し
たような従来の熱線式検知器にあっては、例えば、図２
に示すような熱線式検知器では、熱線検知時であっても
熱線感知素子３の前方に光源５が有るので、小さな光源
５ではあるものの、せっかく熱線感知素子３に収束する
熱線が光源５によって遮られるので、その分、熱線式検
知器の感度が低下する。また、例えば、図３に示すよう
な熱線式検知器では、収束される熱線が光源５によって
遮られることは無いものの、光源５を移動するための機
械的な機構が介在するために構造が複雑に成る上に、ガ
タツキが生じ熱線感知素子３を焦点近傍に正確に固定す
ることが難しく熱線式検知器の感度が低下すると言う問
題点があった。However, in the conventional heat ray type detector as described above, for example, as shown in FIG.
In the heat ray type detector as shown in FIG. 3, since the light source 5 is in front of the heat ray sensing element 3 even when the heat ray is detected, the heat ray converged to the heat ray sensing element 3 by the light source 5 though it is a small light source 5. Since it is blocked, the sensitivity of the heat ray type detector is reduced accordingly. Further, for example, in the heat ray type detector as shown in FIG. 3, although the converged heat ray is not blocked by the light source 5, the structure is complicated because a mechanical mechanism for moving the light source 5 is interposed. In addition, there is a problem that rattling occurs and it is difficult to accurately fix the heat ray sensing element 3 in the vicinity of the focal point, and the sensitivity of the heat ray type detector decreases.
【０００９】本発明は、上記の問題点を改善するために
成されたもので、その目的とするところは、ゾーンロケ
ータ機能を備えながら、検知感度の低下の無い熱線式検
知器を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat ray type detector having a zone locator function and having no deterioration in detection sensitivity. It is in.
【００１０】[0010]
【課題を解決するための手段】本発明は上記の問題点を
解決するため、請求項１記載の発明にあっては、検知領
域からの熱線の収束する焦点近傍に熱線感知素子が配設
され熱線量の変化を検知して発報すると共に前記検知領
域の確認のためのゾーンロケータ機能を備える熱線式検
知器において、熱線は透過するものの可視光は拡散する
可視光拡散部を前記熱線感知素子の近傍前部に配設する
と共に、前記可視光拡散部を後方から可視光で照射する
光源を配設したことを特徴とする。In order to solve the above problems, the present invention provides a heat ray sensing element in the vicinity of the focus of heat rays from the detection area. In a heat ray type detector having a zone locator function for detecting and reporting a change in heat dose and for confirming the detection area, the heat ray sensing element includes a visible light diffusing portion in which a heat ray is transmitted but a visible light is diffused. And a light source for irradiating the visible light diffusing portion with visible light from the rear.
【００１１】また、請求項２記載の発明にあっては、前
記可視光拡散部をポリエチレンフィルムとしたことを特
徴とする。The invention according to claim 2 is characterized in that the visible light diffusing portion is a polyethylene film.
【００１２】[0012]
【作用】上記のように構成したことにより、請求項１記
載の発明にあっては、ゾーンロケータ機能を使用する場
合は、光源のための電源を供給して光源を点灯すると、
光源からの可視光は、熱線感知素子の近傍前部に配設さ
れた可視光拡散部で拡散されて、可視光拡散部が全体に
略均一に可視光を拡散放散する。すると、可視光拡散部
の放散する可視光の見ることのできる位置が検知領域で
あると判断できる。しかも、前記可視光拡散部は、熱線
は透過するものの可視光は拡散するものであり且つ前記
光源は後方に配設されている。従って、ゾーンロケータ
機能の使用状態から熱線検知の状態に切り換えるには光
源を電気的に消灯するのみで良く、熱線検知の状態であ
ってもせっかく熱線感知素子に収束される熱線が光源に
よって遮られることも無く、光源を焦点に移動させるよ
うな機械的な構造も不要にできる。With the above configuration, in the invention according to claim 1, when the zone locator function is used, the power source for the light source is supplied to turn on the light source.
Visible light from the light source is diffused by the visible light diffusing section provided in the front part in the vicinity of the heat ray sensing element, and the visible light diffusing section diffuses and diffuses the visible light substantially uniformly over the whole. Then, it is possible to determine that the visible area of the visible light diffused by the visible light diffuser is the detection area. Moreover, the visible light diffusing portion transmits heat rays but diffuses visible light, and the light source is arranged rearward. Therefore, in order to switch from the usage state of the zone locator function to the heat ray detection state, it is only necessary to electrically turn off the light source, and even in the heat ray detection state, the heat ray focused on the heat ray sensing element is blocked by the light source. In addition, a mechanical structure for moving the light source to the focal point can be eliminated.
【００１３】請求項２記載の発明にあっては、前記可視
光拡散部を簡単且つ安価に構成できる。According to the second aspect of the invention, the visible light diffusing section can be constructed simply and at low cost.
【００１４】[0014]
【実施例】以下、本発明に係る熱線式検知器の一実施例
を図１に基づいて詳細に説明する。図１は熱線式検知器
を説明するための要部断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the heat ray detector according to the present invention will be described in detail below with reference to FIG. FIG. 1 is a sectional view of an essential part for explaining the hot-wire detector.
【００１５】図１において、１は可視光拡散部、２a は
平面集合反射板、２b は放物面反射板、３は熱線感知素
子に相当する焦電素子、４はプリント配線基板、５は光
源に相当する赤色光を発光する発光ダイオード、Ｅ1,Ｅ
2,Ｅ3 は検知領域の確認作業者の目の位置、Ａ，Ｂ，…
は検知領域をそれぞれ示している。In FIG. 1, 1 is a visible light diffusing portion, 2 a is a plane collective reflection plate, 2 b is a parabolic reflection plate, 3 is a pyroelectric element corresponding to a heat ray sensing element, 4 is a printed wiring board, 5 Is a light emitting diode that emits red light corresponding to the light source, E 1, E
2, E 3 are the positions of the eyes of the operator confirming the detection area, A, B, ...
Indicates the detection areas, respectively.
【００１６】可視光拡散部１は、熱線は透過するものの
可視光は拡散するポリエチレンフィルムを略円形に成形
したものである。なお、熱線は透過するものの可視光は
拡散するものとしてシリコンの単結晶板が有るが、シリ
コンの単結晶板は加工し難く高価なものであるので使用
することは困難である。The visible light diffusing section 1 is formed by molding a polyethylene film, which transmits heat rays but diffuses visible rays, into a substantially circular shape. There is a silicon single crystal plate that transmits heat rays but diffuses visible light, but it is difficult to use the silicon single crystal plate because it is difficult and expensive to process.
【００１７】平面集合反射板２a は平面状の鏡面反射板
を複数接合して富士山形に成したもので、頂部には可視
光拡散部１を取着すると共に熱線を焦電素子３に導入す
るための開口部が形成されている。放物面反射板２b は
鏡面の回転放物面を備えたものである。プリント配線基
板４は平面集合反射板２a の内側に適宜方法で固定され
ており、プリント配線基板４に取着された焦電素子３が
放物面反射板２b の焦点位置に位置するように配設され
ている。発光ダイオード５は、適宜方法で平面集合反射
板２a の内側に固定され、焦電素子３の斜め後方から可
視光拡散部１を照射できるように配設されている。The flat collective reflector 2a is a Mt. Fuji shape in which a plurality of flat mirror reflectors are joined together. The visible light diffusing portion 1 is attached to the top and heat rays are introduced into the pyroelectric element 3. An opening is formed for this. The parabolic reflector 2 b is provided with a mirror-like rotating paraboloid. The printed wiring board 4 is fixed inside the plane collective reflector 2 a by an appropriate method so that the pyroelectric element 3 attached to the printed wiring board 4 is positioned at the focal position of the parabolic reflector 2 b. It is installed in. The light emitting diode 5 is fixed to the inside of the flat collective reflection plate 2 a by an appropriate method, and is arranged so that the visible light diffusing section 1 can be illuminated from diagonally behind the pyroelectric element 3.
【００１８】上述のように構成された熱線式検知器は次
のようにして熱線検知の動作を行う。すなわち、熱線式
検知器は、検知領域Ａ，Ｂ，…からやって来る熱線を、
平面集合反射板２a で反射させて放物面反射板２b に導
き、更に放物面反射板２b で反射させて最終的に焦電素
子３の位置で収束させる。このとき、収束する熱線は可
視光拡散部１を透過して焦電素子３に達する。従って、
例えば、検知領域Ａ，Ｂ，…内に侵入者が有ると、焦電
素子３の受ける熱線量が侵入者によって変化するので、
焦電素子３は変化に応じた電圧を出力する。すると、熱
線式検知器のセンサ回路（図示せず）が、この焦電素子
３の出力電圧レベルを判定して所定レベル以上であれば
侵入者が有ると判定する。すると、熱線式検知器は発報
するのである。The heat ray type detector constructed as described above performs the heat ray detecting operation as follows. That is, the heat ray type detector detects heat rays coming from the detection areas A, B, ...
The light is reflected by the plane collective reflection plate 2 a and guided to the parabolic reflection plate 2 b , further reflected by the parabolic reflection plate 2 b , and finally converged at the position of the pyroelectric element 3. At this time, the converging heat ray passes through the visible light diffusion portion 1 and reaches the pyroelectric element 3. Therefore,
For example, if there is an intruder in the detection areas A, B, ..., The heat dose received by the pyroelectric element 3 changes depending on the intruder.
The pyroelectric element 3 outputs a voltage according to the change. Then, a sensor circuit (not shown) of the heat ray detector determines the output voltage level of the pyroelectric element 3, and if it is equal to or higher than a predetermined level, it is determined that there is an intruder. Then, the heat ray type detector gives an alarm.
【００１９】上述の熱線式検知器にあっては、検知領域
Ａ，Ｂ，…の確認のためのゾーンロケータ機能を次のよ
うにして発揮させることができる。すなわち、発光ダイ
オード５に電源を供給して光源５を点灯すれば良いので
ある。発光ダイオード５が点灯すると、発光ダイオード
５からの赤色光は可視光拡散部１を照射する。すると、
この赤色光は、可視光拡散部１の表面から全体に略均一
に拡散放散される。しかも、可視光拡散部１は、焦電素
子３の前方に位置していると共に、放物面反射板２b の
焦点の近傍に位置している。従って、発光ダイオード５
を点灯しておいて熱線式検知器を見たとき、赤色に光る
可視光拡散部１の見える位置は、この熱線式検知器の検
知領域Ａ，Ｂ，…であると判断できる。In the above-mentioned heat ray type detector, the zone locator function for confirming the detection areas A, B, ... Can be exhibited as follows. That is, the light source 5 may be turned on by supplying power to the light emitting diode 5. When the light emitting diode 5 is turned on, the red light from the light emitting diode 5 illuminates the visible light diffusing section 1. Then,
The red light is diffused and diffused substantially uniformly from the surface of the visible light diffusing unit 1. Moreover, the visible light diffuser 1 is located in front of the pyroelectric element 3 and near the focal point of the parabolic reflector 2 b . Therefore, the light emitting diode 5
When the heat ray type detector is turned on with looking at, the visible position of the visible light diffusing portion 1 shining in red can be judged to be the detection areas A, B, ... Of the heat ray type detector.
【００２０】従来の熱線式検知器であると、光源として
消費電力が少なく光効率の良い小さな発光部の発光ダイ
オードを用いると共に、せっかく収束する熱線を光源が
遮らないようにできるだけ光源を小さなものにしてあ
り、焦点位置から光源の発光部が外れると検知領域であ
っても光源からの光が小さな点にしか見えず、検知領域
の確認が難しかった。しかし、上述の熱線式検知器であ
ると、光源は小さなものであっても、可視光拡散部は光
源からの可視光を全体に拡散放散して光るので発光面積
を広くすることが可能で、ゾーンロケータ機能を使用時
に検知領域から大きく光る可視光拡散部を見ることがで
き、検知領域の確認が行い易く成る。In the conventional heat ray detector, a light emitting diode of a small light emitting portion which consumes less power and has high light efficiency is used as a light source, and the light source is made as small as possible so that the light ray does not block the converging heat ray. However, when the light emitting portion of the light source deviates from the focus position, the light from the light source can be seen only as a small point even in the detection area, which makes it difficult to confirm the detection area. However, in the above-mentioned heat ray type detector, even if the light source is small, the visible light diffusing section radiates visible light from the light source by diffusing and radiating the whole light, so that the light emitting area can be widened. When the zone locator function is used, the visible light diffusing section that shines greatly from the detection area can be seen, which facilitates confirmation of the detection area.
【００２１】なお、本発明は実施例に限定されるもので
はなく、収束レンズを用いた熱線式検知器であっても良
く、光源は１個であっても良いことは言うまでもない。The present invention is not limited to the embodiment, and it goes without saying that a heat ray type detector using a converging lens may be used and the number of light sources may be one.
【００２２】[0022]
【発明の効果】本発明の熱線式検知器は上記のように構
成されたものであるから、請求項１記載の発明にあって
は、ゾーンロケータ機能を備えていながら、熱線感知素
子に収束される熱線を光源で減衰させることが無いと共
に、光源を焦点に移動するための機械的な機構が不要で
構造が簡単な上にガタツキが無く、熱線感知素子を焦点
位置に確実に固定できて検知感度の低下が生じなく検知
感度が安定する、請求項２記載の発明にあっては、前記
効果に加えて、可視光拡散部を安価に構成可能な熱線式
検知器が提供できると言う効果を奏する。Since the heat ray detector of the present invention is constructed as described above, the invention according to claim 1 is provided with a zone locator function and is converged into a heat ray sensing element. Heat rays are not attenuated by the light source, there is no mechanical mechanism for moving the light source to the focus, the structure is simple and there is no rattling, and the heat ray sensing element can be securely fixed at the focus position for detection. In the invention according to claim 2 in which the detection sensitivity is stable without a decrease in the sensitivity, in addition to the effects described above, there is an effect that a heat ray type detector in which the visible light diffusing portion can be configured at low cost can be provided. Play.
【図１】本発明に係る熱線式検知器の一実施例を説明す
るための要部断面図である。FIG. 1 is a sectional view of an essential part for explaining an embodiment of a heat ray detector according to the present invention.
【図２】従来の熱線式検知器の一例を説明するための要
部断面図である。FIG. 2 is a cross-sectional view of main parts for explaining an example of a conventional heat ray detector.
【図３】従来の熱線式検知器の他の例を説明するための
要部断面図である。FIG. 3 is a cross-sectional view of essential parts for explaining another example of the conventional heat ray detector.
１ 可視光拡散部 ３ 熱線感知素子 ５ 光源 Ａ 検知領域 Ｂ 検知領域 1 Visible Light Diffusing Part 3 Heat Ray Sensing Element 5 Light Source A Sensing Area B Sensing Area
Claims (2)
に熱線感知素子が配設され熱線量の変化を検知して発報
すると共に前記検知領域の確認のためのゾーンロケータ
機能を備える熱線式検知器において、熱線は透過するも
のの可視光は拡散する可視光拡散部を前記熱線感知素子
の近傍前部に配設すると共に、前記可視光拡散部を後方
から可視光で照射する光源を配設したことを特徴とする
熱線式検知器。1. A hot-wire type device having a heat-ray sensing element disposed near a focus point where heat rays from the detection area are converged to detect a change in heat dose and issue a warning, and a zone locator function for confirming the detection area. In the detector, a visible light diffusing portion that transmits heat rays but diffuses visible light is arranged in the front part in the vicinity of the heat ray sensing element, and a light source that irradiates the visible light diffusing portion with visible light from behind is arranged. The heat ray type detector characterized in that
ムとしたことを特徴とする請求項１記載の熱線式検知
器。2. The heat ray detector according to claim 1, wherein the visible light diffusing portion is a polyethylene film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20134192A JP3144074B2 (en) | 1992-07-28 | 1992-07-28 | Hot wire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20134192A JP3144074B2 (en) | 1992-07-28 | 1992-07-28 | Hot wire detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0652452A true JPH0652452A (en) | 1994-02-25 |
| JP3144074B2 JP3144074B2 (en) | 2001-03-07 |
Family
ID=16439424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20134192A Expired - Lifetime JP3144074B2 (en) | 1992-07-28 | 1992-07-28 | Hot wire detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3144074B2 (en) |
-
1992
- 1992-07-28 JP JP20134192A patent/JP3144074B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3144074B2 (en) | 2001-03-07 |
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