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JPH0357990A - Human body detector - Google Patents

Human body detector

Info

Publication number
JPH0357990A
JPH0357990A JP1193438A JP19343889A JPH0357990A JP H0357990 A JPH0357990 A JP H0357990A JP 1193438 A JP1193438 A JP 1193438A JP 19343889 A JP19343889 A JP 19343889A JP H0357990 A JPH0357990 A JP H0357990A
Authority
JP
Japan
Prior art keywords
human body
alarm
output
detected
detection
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
JP1193438A
Other languages
Japanese (ja)
Inventor
Takashi Horii
堀井 貴司
Hidekazu Himesawa
秀和 姫澤
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP1193438A priority Critical patent/JPH0357990A/en
Publication of JPH0357990A publication Critical patent/JPH0357990A/en
Pending legal-status Critical Current

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  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE:To facilitate detection of a human body and to enable prevention of stop of the operation of a load such as illumination or air-conditioning by providing an alarm output unit which issues an alarm for calling forth the motion of the human body when the presence of the human body is not detected for a prescribed period or longer. CONSTITUTION:An infrared ray from a detection area is sensed by an infrared photodetector 2 of an optical system 1 and it is amplified 6 and outputted to a processing decision unit 4. When the processing unit 4 detects the presence of a human body, a load is set in motion by an output of an output unit 5. On the occasion, the processing unit 4 makes a judgement as to the presence or absence of the human body according to whether or not the output of the photodetector 2 exceeds a threshold value set beforehand. When the motion of the human body is detected at least once within a prescribed standby time, a man is judged to be present in continuation and the state of operation of the load is maintained, even if the body or a part of it does not move nearly at all and a detection signal from the photode tector 2 ceases. An alarm is outputted if the state of absence of the output of detection of the human body continues longer than the prescribed standby time. When the state wherein the motion of the human body is not detected continues still in a prescribed number of times after the alarm is outputted, the human body is judged to be really absent and the operation of the alarm output unit 6 is stopped.

Description

【発明の詳細な説明】 し産業上の利用分野] 本発明は、人体から放射される赤外線量と床面等の背景
から放射される赤外線量の差を、人体の移動、若しくは
人体の一部分の動きにより検出する赤外線受光式の人体
検出装置に関するものである. [従来の技術] 赤外線受光式の人体検出装置は、人体と背景の温度差を
赤外線のエネルギー量の差として焦電素子等の赤外線検
出素子を用いて検出することにより人体を検出する装置
であり、近年広く普及するようになった.この種の人体
検出装置は、主として徒歩などで移動する人体を検出す
るものであった.ところが、例えば、会議室や応接室等
で着席中の人体を検知する場合には、人体全体の移動を
期待することはできないため、身体の一部、例えば、頭
部や腕部、手等の微小な動きを検知する必要が生じる.
そこで、本発明者らは、検知すべき人体の全体あるいは
一部分を検知するのに適した大きさの検知エリアを有す
る人体検出装置を既に提案している(特願昭63−30
8183号参照).これにより、室内で着席中の人体も
、その身体の一部の微小な動きにより検知することが可
能となった. [発明が解決しようとする課題] ところが、上記の従来例は、原理的には赤外線検出素子
(特に焦電素子〉を用いた熱源の移動を検知する方式で
あるので、例えば、会議室や応接室等で着席中に、身体
又は身体の一部がほとんど動かないような状態が続くと
、赤外線検出素子からの検知出力が無くなる.この検知
出力の有無によって室内照明や空調機等の負荷制御を行
うので、室内に人が居るにも拘わらず、室内照明が消灯
したり、空調機が停止したりするという不都合が生じる
可能性があった. 実際には、処理判断部において、一定の待機時間を設け
、その待機時間内に少なくとも一度、人体の動きを検知
すれば、継続して人が存在するものと判断し、負荷の動
作状態を保持するようにしている.しかしながら、人が
室内に存在するにも拘わらず、その動きが非常に少ない
ために、上記の待機時間内に赤外線検出素子が一度も人
体の動きを検知できないような場合には、人が存在しな
くなったものと判断し、室内照明や空調機等の負荷を停
止させてしまうという事態が生じ得る。
[Detailed Description of the Invention] [Industrial Application] The present invention is aimed at detecting the difference between the amount of infrared rays emitted from the human body and the amount of infrared rays emitted from the background such as the floor by adjusting the movement of the human body or the amount of infrared rays emitted from a part of the human body. This relates to an infrared-receiving human body detection device that detects movement. [Prior Art] An infrared receiving type human body detection device is a device that detects a human body by detecting the temperature difference between the human body and the background as a difference in the amount of infrared energy using an infrared detection element such as a pyroelectric element. has become widely popular in recent years. This type of human body detection device mainly detects human bodies moving on foot or the like. However, when detecting a seated human body in a conference room, reception room, etc., for example, it is not possible to expect the entire human body to move. It becomes necessary to detect minute movements.
Therefore, the present inventors have already proposed a human body detection device having a detection area suitable for detecting the whole or part of the human body to be detected (Japanese Patent Application No. 63-30
(See No. 8183). This makes it possible to detect even the slightest movement of a part of a person's body while seated indoors. [Problems to be Solved by the Invention] However, the above-mentioned conventional example uses an infrared detection element (particularly a pyroelectric element) to detect the movement of a heat source, so it cannot be used, for example, in a conference room or a reception area. If your body or a part of your body hardly moves while you are seated in a room, the detection output from the infrared detection element will disappear.The presence or absence of this detection output can be used to control the load on indoor lighting, air conditioners, etc. This could cause inconveniences such as the indoor lights turning off or the air conditioner stopping even though there were people in the room. If a human body movement is detected at least once during the waiting time, it is determined that a person continues to be present, and the operating state of the load is maintained.However, if a person is present in the room, However, if the infrared detection element cannot detect any movement of the human body at all within the above waiting time because the movement is so small, it is determined that the person is no longer present. A situation may arise in which loads such as indoor lighting and air conditioners are stopped.

一方、上記のような事態を防止するために、上記の待機
時間を十分に長く設定することも考えられるが、この場
合には、人が部屋を退出してから負荷が停止するまでの
時間が長くなるという問題が生じる. 本発明はこのような点に鑑みてなされたものであり、そ
の目的とするところは、待機時間内に一度も人体の動き
を検知しなかった場合に、負荷の動作状態を解除する前
に、何等かの手段によって警報を発して、検知領域に居
る人に対して動きを喚起することができる人体検出装置
を提供することにある. [課題を解決するための千段] 本発明にあっては、上記の課題を解決するために、第l
図に示すように、検知領域からの赤外線を集光する光学
系1と、前記光学系1にて集光された赤外線を受光する
赤外線検出素子2と、前記赤外線検出素子2の出力を増
幅する増幅部3と、前記増幅部3にて増幅された赤外線
検出素子2の出力より人体の有無を判定する処理判断部
4と、前記処理判断部4により人体の存在が検出された
ときに負荷を動作させる出力部5とを有する人体検出装
置において、人体の存在が所定期間以上検出されないと
きに人体の動きを喚起するための視覚的又は聴覚的な警
報を発する警報出力部6を設けたことを特徴とするもの
である. し作用コ 本発明の人体検出装置にあっては、人体の存在が所定期
間以上検出されないときには、警報出力部6により人体
の動きを喚起するための視覚的又は聴覚的な警報を発す
るようにしたので、検知領域内に居る人体の動きが非常
に少ない場合に、その動きを喚起して、人体を検出しや
すくすることができ、検知領域内に人体が存在するにも
拘わらず、照明負荷や空調負荷のような負荷が動作を停
止するという不都きを防止することができる.[実施例
] 第■図は本発明の一実施例を示すブロック図である.l
は光学系であり、ミラー又はレンズを用いて検知領域か
らの赤外線を集光する.本実施例の場合は、多分割ミラ
ー又は多分割レンズを用いて、複数の検知領域から赤外
線を集光する.2は赤外線検出素子であり、本実施例で
は、常温で動作可能で安価な焦電素子を用いる.赤外線
検出素子2を光学系1の焦点面上に配置することにより
、物面上には光学系1を通じて第2図に示すような複数
の検知領域Xが形成される.第2図において、点線で囲
まれた円内の領域Sにおいて、検知すべき人体部位(人
体の全体或いは一部〉の動きがあると、赤外線検出素子
2が背景との温度差の変化として出力を生じる. 3は増幅部であり、赤外線検出素子2の出力を増幅する
. 4は処理判断部であり、増幅部3により増幅された赤外
線検出素子2の出力が予め設定しておいた閾値■Tを越
えるか否かを判定して、人体の有無を判定する.前述の
ように、会議室や応接室等で着席中に、身体又は身体の
一部がほとんど動かないような状態が続くと、赤外線検
出素子(特に焦電素子)からの検知出力が無くなる.そ
こで、処理判断部4においては、一定の待機時間を設け
、その待機時間内に少なくとも一度、人体の動きを検知
すれば、継続して人が存在するものと判断し、負荷の動
作状態を保持するようにしている.5は出力部であり、
処理判断部4からの判定結果を外部に出力し、照明負荷
や空調機のような負荷を制御するものである. 6は警報出力部であり、処理判断部4からの判定結果に
より視覚的又は聴覚的な警報を発する手段を有するもの
である.視覚的な警報手段としては、例えば、小型の電
球や表示灯などが点灯又は点滅する装置を使用すれば良
く、聴覚的な警報手段としては、ベルやチャイム等が鳴
動する装置を使用すれば良い. 第2図は本実施例の人体検出装置による検知領域Xと非
検知領域Yの配置の一例を示している.点線で囲まれた
円内の領域Sにおいて、検知すべき人体部位(人体の全
体或いは一部〉の動きがあると、その動きは検知領域X
と非検知領域Yを交互に通過するような動きとなるので
、検知領域X内においては、赤外線量の変化を生じるこ
とになり、赤外線検出素子2から出力が得られる.とこ
ろで、人が室内に存在するにも拘わらず、その動きが非
常に少ないために、規定の待機時間内に赤外線検出素子
2が一度も人体の動きを検知しないような場合には、例
えば、照明負荷を消灯してしまう、あるいは空調負荷を
切ってしまうという状況が生じる.そこで、処理判断部
4において、規定の待機時間内に一度も人体の動きを検
知しなかった場合には、負荷の動作状態を解除(例えば
照明を消灯)する前に、警報出力部6により視覚的又は
聴覚的な警報を発し、室内に居る人に対して動きを喚起
する.いずれの場合においても、室内等で作業中に、突
然、警報出力部6から警報が生じても、作業に支障を来
さない程度の警報手段であることが望ましい.また、動
きを喚起するための光量や音量は、状況に応じて調節で
きるような機構になっていることが望ましい.なお、人
が部屋を使用している間に、警報出力部6による発光や
鳴動が頻繁に起こるようであれば、上記の待機時間を長
目に設定すれば良い. ところで、警報出力部6が常に動作可能な状態にセント
されていると、人が部屋を退出し、部屋が未使用の状態
となった場合に,待機時間毎に警報出力部6が働いてし
まう.これを防ぐために、警報出力部6が働いても人の
動きが検知されない状態が(規定の回数又は規定の時間
)続いた場合には、本当に人が居ないものと判断し、警
報出力部6の働きを禁止することが好ましい. 第3図に処理判断部4における上記の処理に関する流れ
図である.図中、■の箇所から処理を開始し、ステップ
#1で人体検出出力の無い状態が所定の待機時間よりも
長いか否かを判定する.所定の待機時間以内に人体検出
出力が得られれば、ステップ#2で変数CをOとして、
ステップ#1の判定を繰り返す.ステップ#lで人体検
出出力の無い状態が所定の待機時間よりも長いと判定さ
れたときには、ステップ#3に移行し、変数Cが所定値
N以上か否かを判定する.ステップ#3で変数Cが所定
値N未満であれば、ステップ#4に移行し、警報出力部
6を動作させて、人体の動きを喚起する.次に、ステッ
プ#5で変数Cに1を加えて、ステップ#1の判定に戻
る.また、ステップ#3で変数Cが所定値N以上であれ
ば、ステップ#4,#5の処理は省略して、ステップ#
1の判定に戻る.これにより、人体検出出力の無い状態
が所定の待機時間よりも長く続くと、警報出力部6から
警報が出力され、この警報が行われても人体の動きが検
知されない状態が所定の回数Nだけ続いた場合には、本
当に人が居ないものと判断し、警報出力部5の働きを停
止させるという機能を実現できる.なお、第3図に示す
処理はマイクロコンピュータでも実現できるが、簡単な
処理であるので、カウンタ回路とタイマー回路及び論理
回路を含むハードウェアで実現しても良い。
On the other hand, in order to prevent the above situation, it may be possible to set the above waiting time sufficiently long, but in this case, the time from when a person leaves the room until the load stops is The problem arises that it becomes long. The present invention has been made in view of these points, and its purpose is to: If no movement of the human body is detected during the standby time, before canceling the operating state of the load, The object of the present invention is to provide a human body detection device capable of emitting an alarm by some means to arouse movement of people in a detection area. [A Thousand Steps to Solve the Problem] In order to solve the above problem, the present invention has the following steps:
As shown in the figure, an optical system 1 that collects infrared light from a detection area, an infrared detection element 2 that receives the infrared light collected by the optical system 1, and an infrared detection element 2 that amplifies the output of the infrared detection element 2. an amplifying section 3; a processing determining section 4 that determines the presence or absence of a human body from the output of the infrared detection element 2 amplified by the amplifying section 3; and a processing determining section 4 that applies a load when the presence of a human body is detected by the processing determining section 4. In a human body detection device having an output section 5 to be operated, an alarm output section 6 is provided which issues a visual or auditory alarm to arouse movement of the human body when the presence of a human body is not detected for a predetermined period of time or more. This is a characteristic feature. Function: In the human body detection device of the present invention, when the presence of a human body is not detected for a predetermined period of time or more, the alarm output unit 6 issues a visual or auditory alarm to arouse movement of the human body. Therefore, when there is very little movement of a human body within the detection area, the movement can be evoked to make it easier to detect the human body, and even if there is a human body within the detection area, the lighting load and This prevents the inconvenience of loads such as air conditioning loads stopping their operation. [Embodiment] Figure 3 is a block diagram showing an embodiment of the present invention. l
is an optical system that uses mirrors or lenses to focus infrared rays from the detection area. In this example, a multi-segmented mirror or multi-segmented lens is used to collect infrared rays from multiple detection areas. 2 is an infrared detection element, and in this embodiment, a pyroelectric element that can be operated at room temperature and is inexpensive is used. By arranging the infrared detection element 2 on the focal plane of the optical system 1, a plurality of detection areas X as shown in FIG. 2 are formed on the object surface through the optical system 1. In Fig. 2, when there is a movement of the human body part (the whole or part of the human body) to be detected in the area S in the circle surrounded by the dotted line, the infrared detection element 2 outputs an output as a change in temperature difference with the background. 3 is an amplifying section, which amplifies the output of the infrared detecting element 2. 4 is a processing judgment section, in which the output of the infrared detecting element 2 amplified by the amplifying section 3 reaches a preset threshold value ■ The presence or absence of a human body is determined by determining whether or not T is exceeded.As mentioned above, if the body or part of the body remains almost motionless while seated in a conference room, reception room, etc. , the detection output from the infrared detection element (particularly the pyroelectric element) disappears.Therefore, the processing judgment unit 4 sets a certain waiting time, and if a movement of the human body is detected at least once within the waiting time, the process is continued. 5 is the output section,
The judgment results from the processing judgment unit 4 are output to the outside to control loads such as lighting loads and air conditioners. Reference numeral 6 denotes an alarm output section, which has means for issuing a visual or auditory alarm based on the judgment result from the processing judgment section 4. As a visual warning means, for example, a device that lights up or flashes a small light bulb or indicator light may be used, and as an audible warning means, a device that sounds a bell, chime, etc. may be used. .. FIG. 2 shows an example of the arrangement of the detection area X and non-detection area Y by the human body detection device of this embodiment. If there is a movement of the human body part (the whole or part of the human body) to be detected in the area S within the circle surrounded by the dotted line, that movement will be detected in the detection area X.
Since the movement alternately passes through the non-detection area Y, the amount of infrared rays changes within the detection area X, and an output is obtained from the infrared detection element 2. By the way, if there is a person in the room but there is very little movement, and the infrared detection element 2 does not detect any movement of the human body within the specified waiting time, for example, the lighting A situation arises where the load is turned off or the air conditioning load is turned off. Therefore, if the processing judgment unit 4 does not detect any movement of the human body within the specified standby time, the alarm output unit 6 will visually detect the It emits a target or audible alarm to alert people in the room to move. In either case, it is desirable that the alarm means be such that even if an alarm is suddenly generated from the alarm output unit 6 while working indoors or the like, the work will not be hindered. In addition, it is desirable that the amount of light and volume to evoke movement be adjusted according to the situation. Incidentally, if the alarm output unit 6 frequently emits light or sounds while a person is using the room, the above-mentioned waiting time may be set to a longer period. By the way, if the alarm output section 6 is kept in an operable state at all times, the alarm output section 6 will operate every standby time when a person leaves the room and the room becomes unused. .. In order to prevent this, if the movement of a person is not detected (for a specified number of times or for a specified time) even if the alarm output unit 6 is activated, it is determined that no one is really present, and the alarm output unit 6 It is preferable to prohibit the function of FIG. 3 is a flowchart regarding the above processing in the processing judgment unit 4. In the figure, the process starts from the point marked ■, and in step #1 it is determined whether the state in which there is no human body detection output is longer than a predetermined standby time. If the human body detection output is obtained within the predetermined waiting time, set variable C to O in step #2,
Repeat the judgment in step #1. When it is determined in step #l that the state in which there is no human body detection output is longer than the predetermined waiting time, the process moves to step #3, and it is determined whether the variable C is greater than or equal to the predetermined value N. If the variable C is less than the predetermined value N in step #3, the process moves to step #4, and the alarm output section 6 is activated to evoke movement of the human body. Next, in step #5, 1 is added to variable C, and the process returns to step #1. Further, if the variable C is equal to or greater than the predetermined value N in step #3, the processes in steps #4 and #5 are omitted, and step
Return to judgment 1. As a result, if a state in which there is no human body detection output continues for longer than a predetermined standby time, an alarm is output from the alarm output unit 6, and even if this alarm is issued, no human body movement is detected for a predetermined number of times N. If this continues, it is determined that no one is really present and the function of the alarm output section 5 is stopped. Note that the process shown in FIG. 3 can be realized by a microcomputer, but since it is a simple process, it may also be realized by hardware including a counter circuit, a timer circuit, and a logic circuit.

[発明の効果] 本発明にあっては、上述のように、赤外線受光式の人体
検出装置において、人体の存在が所定期間以上検出され
ないときに人体の動きを喚起するための視覚的又は聴覚
的な警報を発する警報出力部を設けたので、検知領域内
に居る人体の動きが非常に少ない場合に、人体の動きを
喚起して人体を検出しやすくすることができ、人体が存
在するにも拘わらず、照明負荷や空調負荷のような負荷
が動作を停止するという不都合を防止できるという効果
がある.
[Effects of the Invention] As described above, in the present invention, in an infrared receiving type human body detection device, a visual or auditory signal is provided to evoke the movement of a human body when the presence of a human body is not detected for a predetermined period of time or more. Since we have provided an alarm output unit that issues an alarm, when there is very little movement of a human body within the detection area, it is possible to arouse the movement of the human body and make it easier to detect the human body. Regardless, it has the effect of preventing the inconvenience of loads such as lighting loads and air conditioning loads stopping their operation.

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

第■図は本発明の一実施例のブロック図、第2図は同上
の検知領域と非検知領域の配置を示す図、第3図は同上
の動作を示す流れ図である.1は光学系、2は赤外線検
出素子、3は増幅部、4は処理判断部、5は出力部、6
は警報出力部である.
Fig. 3 is a block diagram of an embodiment of the present invention, Fig. 2 is a diagram showing the arrangement of the detection area and non-detection area same as above, and Fig. 3 is a flowchart showing the operation of the same. 1 is an optical system, 2 is an infrared detection element, 3 is an amplification section, 4 is a processing judgment section, 5 is an output section, 6
is the alarm output section.

Claims (1)

【特許請求の範囲】[Claims] (1)検知領域からの赤外線を集光する光学系と、前記
光学系にて集光された赤外線を受光する赤外線検出素子
と、前記赤外線検出素子の出力を増幅する増幅部と、前
記増幅部にて増幅された赤外線検出素子の出力より人体
の有無を判定する処理判断部と、前記処理判断部により
人体の存在が検出されたときに負荷を動作させる出力部
とを有する人体検出装置において、人体の存在が所定期
間以上検出されないときに人体の動きを喚起するための
視覚的又は聴覚的な警報を発する警報出力部を設けたこ
とを特徴とする人体検出装置。
(1) an optical system that collects infrared rays from a detection area, an infrared detection element that receives the infrared rays collected by the optical system, an amplification section that amplifies the output of the infrared detection element, and the amplification section A human body detection device comprising: a processing determination unit that determines the presence or absence of a human body based on the output of an infrared detection element amplified by the processing determination unit; and an output unit that operates a load when the presence of a human body is detected by the processing determination unit, A human body detection device comprising an alarm output unit that issues a visual or auditory alarm to arouse movement of a human body when the presence of a human body is not detected for a predetermined period of time or more.
JP1193438A 1989-07-26 1989-07-26 Human body detector Pending JPH0357990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1193438A JPH0357990A (en) 1989-07-26 1989-07-26 Human body detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1193438A JPH0357990A (en) 1989-07-26 1989-07-26 Human body detector

Publications (1)

Publication Number Publication Date
JPH0357990A true JPH0357990A (en) 1991-03-13

Family

ID=16307994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1193438A Pending JPH0357990A (en) 1989-07-26 1989-07-26 Human body detector

Country Status (1)

Country Link
JP (1) JPH0357990A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010074189A1 (en) 2008-12-24 2010-07-01 河淳株式会社 Rack assembly
WO2011096063A1 (en) 2010-02-04 2011-08-11 河淳株式会社 Coupling member, and assembled rack provided with same
US8545981B2 (en) 2004-09-07 2013-10-01 Kaneka Corporation Artificial hair made of flame-retardant polyester
WO2014136526A1 (en) 2013-03-05 2014-09-12 河淳株式会社 Coupling member and ready-to-assemble shelving that uses same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8545981B2 (en) 2004-09-07 2013-10-01 Kaneka Corporation Artificial hair made of flame-retardant polyester
WO2010074189A1 (en) 2008-12-24 2010-07-01 河淳株式会社 Rack assembly
WO2011096063A1 (en) 2010-02-04 2011-08-11 河淳株式会社 Coupling member, and assembled rack provided with same
WO2014136526A1 (en) 2013-03-05 2014-09-12 河淳株式会社 Coupling member and ready-to-assemble shelving that uses same

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