JPH0336687A - Detector - Google Patents

Detector

Info

Publication number
JPH0336687A
JPH0336687A JP1171187A JP17118789A JPH0336687A JP H0336687 A JPH0336687 A JP H0336687A JP 1171187 A JP1171187 A JP 1171187A JP 17118789 A JP17118789 A JP 17118789A JP H0336687 A JPH0336687 A JP H0336687A
Authority
JP
Japan
Prior art keywords
detector
invader
detected
infrared rays
detection signal
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.)
Pending
Application number
JP1171187A
Other languages
Japanese (ja)
Inventor
Hiroyuki Yajima
弘之 矢島
Mitsuyoshi Ito
伊藤 光良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Secom Co Ltd
Chino Corp
Original Assignee
Secom Co Ltd
Chino Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Secom Co Ltd, Chino Corp filed Critical Secom Co Ltd
Priority to JP1171187A priority Critical patent/JPH0336687A/en
Publication of JPH0336687A publication Critical patent/JPH0336687A/en
Pending legal-status Critical Current

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  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

PURPOSE:To obtain a detection signal of an always fixed level without being influenced by the invading direction of an invader into respective monitoring zones by inclining a respective elements constituting a differential detecting element for detecting infrared rays radiated from an object such as a human body only by a prescribed angle. CONSTITUTION:When an envader is invaded into respective monitoring zones A, B from the C direction, infrared rays radiated from the invader are detected by an element 3 at first and then detected by an element 4 and infrared rays radiated from an envader invaded from the D direction are detected in the reverse order. Thereby, a conventional detection signal having a large level difference generated in accordance with the invading direction of an invader does not appear and the signal of the always fixed level can be secured, so that detection accuracy can be improved. Since an inclination angle X enables the detector to detect an invader in a zone shifted from the monitoring zones A, B, it is preferable to set up the angle X within the range of 0<X<90 deg..

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、例えば人体等の物体より放射される赤外線を
検出する検知器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a detector that detects infrared rays emitted from an object such as a human body.

[従来の技術] 例えば夜間のような不在時における侵入者の監視手段と
しては、第5図および第7図に示すような2ビーム形焦
電素子による差動形検出素子が一般的に用いられている
[Prior Art] A differential detection element using a two-beam pyroelectric element as shown in FIGS. 5 and 7 is generally used as a means for monitoring intruders when an intruder is absent, such as at night. ing.

この検知器に用いられる差動形検出素子として2ビーム
形焦電素子11は、第6図に示すようにコンデンサをな
す一対のエレメント13.14と、コンデンサの充・放
電の状態に応じてオン・オフ動作する電界効果トランジ
スタF 、E Tとを備えた差動型の回路によって構成
されてパッケージI2内に設けられるもので、この焦電
素子11は監視区域における壁等に固定された機器本体
15に設けられており、第7図に示すように各エレメン
ト13.14より斜め下方(床面)に向けて平行に監視
ゾーンA、Bが形成されている。
As a differential detection element used in this detector, a two-beam pyroelectric element 11 is connected to a pair of elements 13 and 14 that form a capacitor, as shown in FIG. - It is composed of a differential type circuit equipped with field effect transistors F and ET that operate in an off state, and is installed in the package I2. As shown in FIG. 7, monitoring zones A and B are formed diagonally downward (towards the floor) from each element 13, 14 in parallel.

そして、外部より侵入者が侵入して各監視ゾーンA、B
を横切ったときに、侵入者が放射する赤外線を各監視ゾ
ーンA、B毎に各エレメント13.14において検出す
ることで、所定レベルの検知信号を機器内部に出力し、
この検知信号に基づいて警報等の処理がなされる構成と
されている。
Then, an intruder enters the monitoring zones A and B from the outside.
By detecting the infrared rays emitted by the intruder at each element 13.14 in each monitoring zone A and B when crossing the intruder, a detection signal of a predetermined level is output inside the device,
The configuration is such that processing such as an alarm is performed based on this detection signal.

[発明が解決しようとする課題] ところで、上述した従来の検知器では、第7図に示すよ
うに侵入者がC方向より侵入してきた場合、侵入者が放
射する赤外線は焦電素子11における十エレメント13
で検出された後に一エレメント14で検出されるので、
第8図(a)に示すように十分なレベルの検知信号を得
ることができる。
[Problems to be Solved by the Invention] By the way, in the conventional detector described above, when an intruder enters from direction C as shown in FIG. element 13
Since it is detected by one element 14 after being detected by
As shown in FIG. 8(a), a detection signal of sufficient level can be obtained.

しかしながら、侵入者がD方向より侵入してきた場合に
は、焦電素子11における十エレメント13および一エ
レメント14による検出がほぼ同時に行なわれるため、
各監視ゾーンA、Bでの赤外線エネルギーが互いに打ち
消しあって検知信号がバランス状態になりやすく、第8
図(b)に示すようにレベルの低い検知信号となり、十
分なレベルの信号を得ることができなかった。
However, if an intruder enters from direction D, detection by ten elements 13 and one element 14 in the pyroelectric element 11 is performed almost simultaneously.
The infrared energy in each monitoring zone A and B cancels each other out, and the detection signals tend to be in a balanced state.
As shown in Figure (b), the level of the detection signal was low, and it was not possible to obtain a signal of sufficient level.

従って、上述した従来の検知器では、各監視ゾーンA、
Bに対する侵入者の侵入方向によって検知41号にレベ
ル差が生じ、確実な侵入者の検出が行なえず信頼性に欠
けていた。
Therefore, in the conventional detector described above, each monitoring zone A,
Differences in the level of detection No. 41 occurred depending on the direction of the intruder's intrusion into B, and the intruder could not be detected reliably, resulting in a lack of reliability.

そこで、本発明は上述した問題点に鑑みてなされたもの
であって、その目的は、各監視ゾーンに対する侵“入省
の侵入方向に影響されることなく、常に一定レベルの検
出信号を得ることができる検知器を提供することにある
Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to always obtain a detection signal of a constant level without being influenced by the direction of intrusion into each monitoring zone. The goal is to provide a detector that can.

[課題を解決するための手段] 上記目的を達成するため1本発明による検知器は、焦電
素子を構成する一対のエレメントを備えた検知器におい
て、前記各エレメントを所定角度傾斜して設けたことを
特徴としている。
[Means for Solving the Problems] In order to achieve the above object, a detector according to the present invention includes a detector including a pair of elements constituting a pyroelectric element, in which each of the elements is tilted at a predetermined angle. It is characterized by

[作用1 差動形検出素子を構成する一対のエレメントを所定角度
傾斜することで、各エレメントより斜めに向けて形成さ
れる各監視ゾーンへの侵入時に侵入者より放射される赤
外線を各監視ゾーン毎に検出する。その結果、検出レベ
ルは侵入者の侵入方向に影響されることなく常に一定に
保たれる。
[Effect 1] By tilting the pair of elements constituting the differential detection element at a predetermined angle, the infrared rays emitted by an intruder when intruding into each surveillance zone formed diagonally from each element are reflected in each surveillance zone. Detect every time. As a result, the detection level is always kept constant regardless of the direction of the intruder's invasion.

[実施例] 第1図は本発明による検知器の一実施例を示す図、第2
図は同検出器による監視ゾーンの一例を示す平面図、第
3図は第2図に示す検出器による監視ゾーンの側面図で
ある。
[Example] Fig. 1 is a diagram showing an embodiment of the detector according to the present invention, and Fig.
The figure is a plan view showing an example of a zone monitored by the same detector, and FIG. 3 is a side view of the zone monitored by the detector shown in FIG. 2.

この実施例による検知器は、例えば人体等の物体より放
射される赤外綿を検出しており、差動形検出素子として
焦電素子iがパッケージ2内に設けられて機器本体20
に配設され、焦電素子lに赤外線を集光し、監視ゾーン
を形成する図示しない光学系とを具備して構成されたも
のである。
The detector according to this embodiment detects infrared cotton emitted from an object such as a human body, and a pyroelectric element i is provided in a package 2 as a differential detection element.
The device is equipped with an optical system (not shown) that focuses infrared rays on a pyroelectric element 1 and forms a monitoring zone.

焦電素子lはコンデンサをなす+、−のエレメント3,
4が2個並列に設けられた2ビーム形のものが用いられ
、その回路構成は〔従来の技術]の項で説明したものと
同一である。各エレメント3.4は共に第1図に示すよ
うに一点鎖線で示す垂直位置よりX°傾斜し、かつ床面
より高い位置にエレメント3が配設された状態で壁等に
固設された機器本体20に配設されており、第2図およ
び第3図に示すように各エレメント3.4の水平方向よ
り斜め下方の床面5に向けて監視ゾーンA、Bが形成さ
れる。この2個の監視ゾーンA。
The pyroelectric element l has + and - elements 3, which form a capacitor.
A two-beam type device in which two number 4s are provided in parallel is used, and its circuit configuration is the same as that described in the [Prior Art] section. As shown in Figure 1, each element 3.4 is a device that is fixed to a wall, etc., with the element 3 tilted by X degrees from the vertical position indicated by the dashed line, and placed at a position higher than the floor surface. It is arranged in the main body 20, and as shown in FIGS. 2 and 3, monitoring zones A and B are formed toward the floor surface 5 diagonally below the horizontal direction of each element 3.4. These two monitoring zones A.

Bはエレメント3Aが床面より高い位置に配設され光学
系を介するため、監視ゾーンAは監視ゾーンBより前方
にずれた状態(遠い)となるように形成されている。
In B, the element 3A is disposed at a higher position than the floor surface and passes through the optical system, so the monitoring zone A is formed to be shifted forward (farther) than the monitoring zone B.

また、監視ゾーンA、Bは各エレメント3.4が傾斜角
度X°傾いて配設されているので、平面的に上から見る
と、距離Zに相当したゾーン分監視ゾーンA、Bはずれ
たように形成されている。
In addition, since the monitoring zones A and B are arranged with each element 3.4 tilted at an inclination angle of is formed.

以上の構成において、第2図に示す各監視ゾーンA、B
に対してC方向より侵入者が侵入してきた場合、侵入者
より放射される赤外線は、まず。
In the above configuration, each monitoring zone A and B shown in FIG.
If an intruder enters from direction C, the infrared rays emitted by the intruder will be:

+エレメント3によって検出された後に一エレメント4
により検出されて第4図(a)に示すような検出信号を
得ることになる。
+ one element 4 after being detected by element 3
As a result, a detection signal as shown in FIG. 4(a) is obtained.

また、各監視ゾーンA、Hに対してD方向より侵入者が
侵入してきた場合、侵入者より放射される赤外線は、C
方向より侵入してきた場合とは逆に、まず、−エレメン
ト4によって検出された後に十エレメント3により検出
されて第4図(blに示すような検出信号を得ることに
なる。
Additionally, if an intruder enters each monitoring zone A or H from direction D, the infrared rays emitted by the intruder will be
Contrary to the case where the intruder enters from the opposite direction, it is first detected by the minus element 4 and then detected by the ten element 3, and a detection signal as shown in FIG. 4 (bl) is obtained.

従って、上述した実施例では、従来のように侵入者の侵
入方向によって大きなレベル差の生じていた検出信号を
、侵入者の侵入方向に影響されずに常に一定のレベルを
確保した状態で得ることができ、検出精度が高1.WM
性に優れた検出器を提供することができる。
Therefore, in the above-described embodiment, the detection signal, which conventionally had a large level difference depending on the direction of intrusion of the intruder, can be obtained in a state where a constant level is always ensured without being affected by the direction of intrusion of the intruder. 1. High detection accuracy. W.M.
It is possible to provide a detector with excellent performance.

ところで、上述した実施例において、各エレメシト3.
4の傾斜角度Xoは、その角度を従来の垂直位置より大
きく傾斜すれば、その分各監視ゾーンA、Bの重なる部
分6(平面的に上から見ると)も多くなって人体の如く
一定の高さのあるものについては同時に監視ゾーンA、
Bを遮ることとなり、従って互いに赤外線エネルギーが
打ち消しあって検出信号のレベルが小さくなるので、希
望する検出信号のレベルに応じて予め各エレメント3,
4の傾斜角度Xoは設定されている。なお、傾斜角度X
oは監視ゾーンA、Bのずれたゾーンで侵入者を検出す
るため、O” <X<90”の内で設定するのが好まし
い。
By the way, in the above-mentioned embodiment, each element 3.
If the inclination angle Xo of No. 4 is made larger than the conventional vertical position, the overlapping portion 6 of each monitoring zone A and B increases accordingly (when viewed from above in a plane), and the angle Xo becomes constant like a human body. For tall objects, monitor zone A at the same time.
Therefore, the infrared energy cancels each other out and the level of the detection signal becomes small.
The inclination angle Xo of 4 is set. In addition, the inclination angle
In order to detect an intruder in zones that are shifted between monitoring zones A and B, o is preferably set within the range O''<X<90''.

[発明の効果] 以上説明したように1本発明による検知器は、各監視ゾ
ーンに対する侵入者の侵入方向に影響されることなく、
常に一定レベルに保持された状態で検出器“号を得るこ
とができ、検出精度に優れた検出器を提供することがで
きる。
[Effects of the Invention] As explained above, the detector according to the present invention can detect the intruder without being affected by the direction in which the intruder enters each monitoring zone.
It is possible to obtain the detector signal in a state where it is always maintained at a constant level, and it is possible to provide a detector with excellent detection accuracy.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明による検知器の一実施例を示す図、第2
図は同検出器による監視ゾーンの一例を示す平面図、第
3図は第2図に示す検出器による監視ゾーンの側面図、
第4図(a)、(b)は第2図に示す監視ゾーンのC,
D方向からの侵入に対する検出信号の波形図、第5図は
従来の検知器の一例を示す図、第6図は検知器を構成す
るPL、型素子の回路構成図、第7図は従来の検出器に
よる監視ゾーンの一例を示す平面図、第8図(a)。 (b)は第7図に示す監視ゾーンのC,D方向からの侵
入に対する検出信号の波形図である。 1・・・焦電素子、3−・・エレメント(+1 、4・
・・エレメント(−)、A、B・・・監視ゾーン。
FIG. 1 is a diagram showing an embodiment of the detector according to the present invention, and FIG.
The figure is a plan view showing an example of the zone monitored by the same detector, FIG. 3 is a side view of the zone monitored by the detector shown in FIG.
Figures 4(a) and (b) show C, the monitoring zone shown in Figure 2.
A waveform diagram of a detection signal for intrusion from direction D, Figure 5 is a diagram showing an example of a conventional detector, Figure 6 is a circuit diagram of the PL and type elements that constitute the detector, and Figure 7 is a diagram of a conventional detector. FIG. 8(a) is a plan view showing an example of a monitoring zone by a detector. (b) is a waveform diagram of a detection signal for intrusion from directions C and D of the monitoring zone shown in FIG. 7. 1...Pyroelectric element, 3-...Element (+1, 4...
...Element (-), A, B...Monitoring zone.

Claims (1)

【特許請求の範囲】[Claims] 差動形検出素子を備えた検知器において、前記差動形検
出素子を構成する各エレメントを所定角度傾斜して設け
たことを特徴とする検知器。
1. A detector comprising a differential detection element, wherein each element constituting the differential detection element is provided at a predetermined angle.
JP1171187A 1989-07-04 1989-07-04 Detector Pending JPH0336687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1171187A JPH0336687A (en) 1989-07-04 1989-07-04 Detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1171187A JPH0336687A (en) 1989-07-04 1989-07-04 Detector

Publications (1)

Publication Number Publication Date
JPH0336687A true JPH0336687A (en) 1991-02-18

Family

ID=15918618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1171187A Pending JPH0336687A (en) 1989-07-04 1989-07-04 Detector

Country Status (1)

Country Link
JP (1) JPH0336687A (en)

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