JPH0481151B2 - - Google Patents
Info
- Publication number
- JPH0481151B2 JPH0481151B2 JP59279501A JP27950184A JPH0481151B2 JP H0481151 B2 JPH0481151 B2 JP H0481151B2 JP 59279501 A JP59279501 A JP 59279501A JP 27950184 A JP27950184 A JP 27950184A JP H0481151 B2 JPH0481151 B2 JP H0481151B2
- Authority
- JP
- Japan
- Prior art keywords
- determination circuit
- output
- circuit
- decrease
- increase
- 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
- 230000007423 decrease Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は人体等から発する熱線を検出し、報知
する熱線式検知器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a heat ray detector that detects heat rays emitted from a human body and provides notification.
上記の熱線式検知器は、検知素子として焦電素
子を用い、適切な光学系を前面に配して熱線を集
光する様構成しているが、電気的ノイズやバツク
グランドの温度上昇によつて動作しないように、
焦電素子を２個、逆極性に接続して、互いに打ち
消すようにしたものがある。しかし前記の方法は
焦電素子が２個必要である欠点がある。また、１
素子型のものでは、第４図に示す増加分または減
少分の論理和で構成したものがあるが上記電気的
ノイズやバツクグランドの温度上昇による誤動作
が起こり易い欠点があつた。
The above-mentioned hot wire detector uses a pyroelectric element as a detection element, and is configured with an appropriate optical system in front to focus the hot wire, but it is difficult to detect due to electrical noise and background temperature rise. to prevent it from operating
There is one in which two pyroelectric elements are connected with opposite polarities so that they cancel each other out. However, the method described above has the disadvantage of requiring two pyroelectric elements. Also, 1
Some element-type devices are constructed using the logical sum of increases and decreases as shown in FIG. 4, but they have the drawback that malfunctions are likely to occur due to the above-mentioned electrical noise and background temperature rise.
本発明は前記の問題点に着目してなされたもの
であり、焦電素子１個用いたタイプにおいて、前
記電気的ノイズやバツクグランドの温度上昇によ
る誤動作のない熱線式検知器を得ることを目的と
する。
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a hot-wire type detector that does not malfunction due to the above-mentioned electrical noise or background temperature rise in a type using a single pyroelectric element. shall be.
本発明は、焦電素子の検出出力の増加分のレベ
ル判定をする増加分判定回路と、減少分のレベル
判定をする減少分判定回路を並列に接続し、前記
増加分判定回路と減少分判定回路の少なくともい
ずれか一方に、前記増加分判定回路たは減少分判
定回路の出力を一定時間保持するタイマー回路を
接続し、更に両出力に論理積回路を接続して構成
したものである。
The present invention provides an increase determination circuit that determines the level of an increase in the detection output of a pyroelectric element and a decrease determination circuit that determines the level of a decrease in the detection output of a pyroelectric element, which are connected in parallel, and the increase determination circuit and the decrease determination circuit are connected in parallel. A timer circuit for holding the output of the increase determination circuit or the decrease determination circuit for a certain period of time is connected to at least one of the circuits, and an AND circuit is connected to both outputs.
以下本発明の実施例の第１図乃至第３図に従い
説明する。焦電素子とした検知素子１には増幅用
のアンプ２が接続され、アンプ２の出力側には増
加分判定回路３と減少分判定回路４が並列に接続
してある。この増加分判定回路３と減少分判定回
路４はそれぞれ検知素子１の増加及び減少のレベ
ル判定をするものである。更に増加分判定回路３
と減少分判定回路４にはタイマー回路５，６がそ
れぞれ接続してあり、増加分判定回路３と減少分
判定回路４の出力の保持をするものである。そし
てタイマー回路５，６には一つの論理積回路８が
接続してある。タイマー回路５，６は場合によつ
てはいずれか一方であつてもかまわない。 Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. An amplifier 2 for amplification is connected to the detection element 1 which is a pyroelectric element, and an increase determination circuit 3 and a decrease determination circuit 4 are connected in parallel to the output side of the amplifier 2. The increase determination circuit 3 and the decrease determination circuit 4 determine the level of increase and decrease of the sensing element 1, respectively. Furthermore, increase determination circuit 3
Timer circuits 5 and 6 are connected to the decrease determination circuit 4 and the increase determination circuit 3, respectively, and hold the outputs of the increase determination circuit 3 and the decrease determination circuit 4. One AND circuit 8 is connected to the timer circuits 5 and 6. Depending on the situation, either one of the timer circuits 5 and 6 may be used.
以上の構成により、第２図及び第３図に従い動
作を説明する。まず、防犯上に用いた時では、検
出すべき侵入者が、検知エリアＷに入つたとき、
検知素子１の出力によりアンプ２には第３図の
AMで示すＬ１の出力が現れ、増加分判定回路３
からは↑に示すのパルス状の出力が出る。このと
き、タイマ回路５からはＴ１に示す一定時間に引
き伸ばした出力ができる。そして侵入者が検知エ
リアＷから出たときに、↓に示すパルス状の出力
と、Ｔ２に示す一定時間に引き伸ばした出力がで
る。そして両出力の論理積がANDに示すように
出力され警報出力となる。 The operation of the above configuration will be explained with reference to FIGS. 2 and 3. First, when used for crime prevention, when an intruder to be detected enters the detection area W,
The output of the detection element 1 causes the amplifier 2 to receive the signal shown in Fig. 3.
The L1 output indicated by AM appears, and the increase judgment circuit 3
Outputs the pulse-like output shown above. At this time, the timer circuit 5 can output an output stretched over a certain period of time indicated by T1. When the intruder leaves the detection area W, a pulse-like output shown below and an output stretched over a certain period of time shown at T2 are output. Then, the logical product of both outputs is output as shown by AND, and becomes an alarm output.
一方、周囲の温度上昇による熱線の増加は、
AMのTEで示すように、アンプ回路２出力はな
だらかに上昇し、減少分は無いためタイマ回路５
の時間内に出力は得られず、誤動作することはな
い。 On the other hand, the increase in heat rays due to the rise in ambient temperature is
As shown by AM TE, the amplifier circuit 2 output rises gently and there is no decrease, so the timer circuit 5
No output will be obtained within this time, and no malfunction will occur.
更に、NOで示すような場合の電気的ノイズに
は、↓に示す僅かの時間の減少分判定回路４出力
が出るのみで誤動作にはいたらないのである。 Furthermore, electrical noise in the case indicated by NO does not result in malfunction, as only a small amount of time decrease judgment circuit 4 output as shown below is output.
〔発明の効果〕
以上説明したように、本発明によれば、人体等
から発する熱線を光学系を用いて集光し、焦電素
子型の検知素子で検出し、検知素子出力の変化に
基づいて人体等の検知信号を出力する熱線式検知
器において、焦電素子の検出出力の増加分のレベ
ル判定をする増加分判定回路と、減少分のレベル
判定をする減少分判定回路を並列に接続し、前記
増加分判定回路と減少分判定回路の少なくともい
ずれか一方に、前記増加分判定回路または減少分
判定回路の出力を一定時間保持するタイマー回路
を接続し、更に両出力に論理積回路を接続した構
成としたので、焦電素子の１素子タイプにおいて
電気的ノイズやバツクグランドの温度上昇による
誤動作のない熱線式検知器が得られ実用上きわめ
て有益である。[Effects of the Invention] As explained above, according to the present invention, heat rays emitted from a human body, etc. are focused using an optical system, detected by a pyroelectric element type sensing element, and detected based on changes in the output of the sensing element. In a hot wire detector that outputs a detection signal of a human body, etc., an increase judgment circuit that judges the level of the increase in the detection output of the pyroelectric element and a decrease judgment circuit that judges the level of the decrease are connected in parallel. A timer circuit for holding the output of the increase determination circuit or the decrease determination circuit for a certain period of time is connected to at least one of the increase determination circuit and the decrease determination circuit, and an AND circuit is connected to both outputs. Because of the connected configuration, a hot wire type detector without malfunction due to electrical noise or background temperature rise can be obtained using a single pyroelectric element type, which is extremely useful in practice.
第１図乃至第３図は本発明の実施例を示し、第
１図は回路図、第２ずは取付け状態を示す側面
図、第３図はタイムチヤートである。第４図は従
来例の回路図である。
Ａ……熱線式検知器、１……焦電素子、３……
増加分判定回路、４……減少分判定回路、５，６
……タイマー回路、８……論理積回路。
1 to 3 show an embodiment of the present invention, FIG. 1 is a circuit diagram, FIG. 2 is a side view showing the installed state, and FIG. 3 is a time chart. FIG. 4 is a circuit diagram of a conventional example. A... Hot wire detector, 1... Pyroelectric element, 3...
Increase determination circuit, 4... Decrease determination circuit, 5, 6
...Timer circuit, 8...Logic product circuit.
Claims (1)
し、焦電素子型の検知素子で検出し、検知素子出
力の変化に基づいて人体等の検知信号を出力する
熱線式検知器において、焦電素子の検出出力の増
加分のレベル判定をする増加分判定回路と、減少
分のレベル判定をする減少分判定回路を並列に接
続し、前記増加分判定回路と減少分判定回路の少
なくともいずれか一方に、前記増加分判定回路ま
たは減少分判定回路の出力を一定時間保持するタ
イマー回路を接続し、更に両出力線を共通に論理
積回路に接続したことを特徴とする熱線式検知
器。1. In a hot ray detector that uses an optical system to focus the heat rays emitted from a human body, detects it with a pyroelectric sensing element, and outputs a detection signal of the human body based on changes in the output of the sensing element, An increase determination circuit that determines the level of the increase in the detection output of the electronic element and a decrease determination circuit that determines the level of the decrease are connected in parallel, and at least one of the increase determination circuit and the decrease determination circuit is connected in parallel. A hot wire type detector characterized in that a timer circuit for holding the output of the increase determination circuit or the decrease determination circuit for a certain period of time is connected to one end thereof, and further, both output lines are commonly connected to an AND circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59279501A JPS61151491A (en) | 1984-12-25 | 1984-12-25 | Heat ray type detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59279501A JPS61151491A (en) | 1984-12-25 | 1984-12-25 | Heat ray type detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61151491A JPS61151491A (en) | 1986-07-10 |
| JPH0481151B2 true JPH0481151B2 (en) | 1992-12-22 |
Family
ID=17611924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59279501A Granted JPS61151491A (en) | 1984-12-25 | 1984-12-25 | Heat ray type detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61151491A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7231161B2 (en) | 1995-03-27 | 2007-06-12 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH599642A5 (en) * | 1976-11-15 | 1978-05-31 | Cerberus Ag | |
| JPS59195179A (en) * | 1983-04-20 | 1984-11-06 | Uro Denshi Kogyo Kk | Alarming device for intruder |
-
1984
- 1984-12-25 JP JP59279501A patent/JPS61151491A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7231161B2 (en) | 1995-03-27 | 2007-06-12 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US7248814B2 (en) | 1995-03-27 | 2007-07-24 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US7274896B2 (en) | 1995-03-27 | 2007-09-25 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US7403733B2 (en) | 1995-03-27 | 2008-07-22 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US7489885B2 (en) | 1995-03-27 | 2009-02-10 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US7630661B2 (en) | 1995-03-27 | 2009-12-08 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
| US9046860B2 (en) | 1995-03-27 | 2015-06-02 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61151491A (en) | 1986-07-10 |
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