JP2621374B2 - Human body detection device - Google Patents
Human body detection deviceInfo
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- JP2621374B2 JP2621374B2 JP63158475A JP15847588A JP2621374B2 JP 2621374 B2 JP2621374 B2 JP 2621374B2 JP 63158475 A JP63158475 A JP 63158475A JP 15847588 A JP15847588 A JP 15847588A JP 2621374 B2 JP2621374 B2 JP 2621374B2
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- output
- human body
- infrared detection
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- 238000001514 detection method Methods 0.000 title claims description 70
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
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Description
【発明の詳細な説明】 〔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。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an infrared light receiving type that detects a difference between the amount of infrared radiation radiated from a human body and the amount of infrared radiation radiated from a background such as a floor surface by moving a human body. The present invention relates to a human body detection device.
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が、それと
ともに、信頼性の改善が要求されている。赤外線受光式
の人体検出装置の誤動作要因としては、検知エリア内で
の背景の温度変化や内部雑音、ヘッドライトや太陽光等
のエネルギーの大きな外乱光の影響などが考えられ、こ
れらの誤動作要因を除去するために、従来、種々の提案
がなされている。The infrared ray 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. At the same time, there is a demand for improved reliability. Possible causes of the malfunction of the infrared ray detection type human body detection device include changes in the background temperature in the detection area, internal noise, and the influence of disturbance light with large energy such as headlights and sunlight. Conventionally, various proposals have been made in order to eliminate such a problem.
その一つとして、第６図に示すように、検知領域から
の赤外線を光学系１により集光し、集光された赤外線を
複数の赤外線検出素子Ａ〜Ｄからなる赤外線検出素子部
２を用いて受光し、各々の出力を増幅部３により独立に
増幅した上で信号処理部４により信号処理し、一定の閾
値を設定しておく閾値設定部51と比較判断部52を含んで
なる判断部５により、ピーク値と出力時刻とを検出し、
これらを相互に比較して人体の有無を判定し、この判定
結果を出力部６から出力するような、人体の移動方向に
依存しない信頼性の高い人体検出装置が提案されている
（特願昭62−242090号）。As one of them, as shown in FIG. 6, an infrared ray from a detection area is condensed by an optical system 1, and the condensed infrared ray is used by an infrared ray detecting element section 2 including a plurality of infrared ray detecting elements A to D. A decision unit including a threshold setting unit 51 and a comparison / judgment unit 52 for independently amplifying each output by the amplifying unit 3 and then performing signal processing by the signal processing unit 4 to set a constant threshold value 5, the peak value and the output time are detected,
A highly reliable human body detection device that does not depend on the moving direction of the human body and that compares these with each other to determine the presence or absence of a human body and outputs the determination result from the output unit 6 has been proposed (Japanese Patent Application Sho. 62-242090).
しかし、この人体検出装置では、各々の赤外線検出素
子の感度にばらつきがあると、出力のピーク値や出力の
立ち上がり時刻に差が生じ、このために人体検出の判定
に影響をあたえるという問題点があった。However, in this human body detection device, if the sensitivity of each infrared detection element varies, a difference occurs in the peak value of the output and the rise time of the output, which affects the determination of the human body detection. there were.
本発明は、上記の点に鑑みてなしたものであり、その
目的とするところは、複数の赤外線検出素子を用いた人
体検知装置に関し、各赤外線検出素子の感度のばらつき
に影響されない信頼性の高い人体検出装置を提供するこ
とにある。The present invention has been made in view of the above points, and an object of the present invention relates to a human body detection device using a plurality of infrared detection elements, and has a reliability that is not affected by variations in the sensitivity of each infrared detection element. An object of the present invention is to provide a high human body detection device.
本発明は、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複数の
赤外線検出素子と、前記複数の赤外線検出素子の各出力
を各々増幅する増幅部と、前記増幅部にて増幅された赤
外線検出素子の各出力を人体検出に適した信号に処理す
る信号処理部と、前記信号処理部により処理された赤外
線検出素子の閾値を設定し、前記複数の赤外線検出素子
の出力が前記閾値を越えたときの出力時刻の時間差が所
定の範囲内であるときには人体が存在すると判断する判
断部と、前記判断部の判断結果を出力する出力部とを有
して成る人体検出装置であって、前記判断部における出
力時刻を判断するための閾値を、前記複数の赤外線検出
素子において、各素子毎にその出力の過去から現在にわ
たってのピーク値の平均値を求め、前記平均値に対して
所定比となるように前記赤外線検出素子毎に設定するよ
うにしたことを特徴とするものである。The present invention provides an optical system that collects infrared light from a detection area, a plurality of infrared detection elements that receive the infrared light collected by the optical system, and amplifies each output of the plurality of infrared detection elements. Amplifying unit, a signal processing unit that processes each output of the infrared detection element amplified by the amplification unit into a signal suitable for human body detection, and sets a threshold value of the infrared detection element processed by the signal processing unit, A determination unit that determines that a human body is present when the time difference between the output times when the outputs of the plurality of infrared detection elements exceed the threshold is within a predetermined range, and an output unit that outputs the determination result of the determination unit. A human body detection device comprising: a threshold value for judging an output time in said judging section, wherein said plurality of infrared detection elements each have a flat average of a peak value from the past to the present output of each element. Determined value, is characterized in that it has to be set for each of the infrared detector to a predetermined ratio to the average value.
本発明の人体検出装置は、複数の赤外線検出素子の各
出力からその立ち上がり時刻を検出するための閾値を、
各々の赤外線検出素子の出力のピーク値の大きさにより
可変としている。つまり、ピーク値が大きいときは閾値
を大きくして、ピーク値が小さいときは閾値を小さくす
るようにして、各赤外線検出素子毎に閾値を定めること
により、各赤外線検出素子毎の出力の立ち上がりに要す
る時間を一定とすることにより、複数の赤外線検出素子
間の感度のばらつきの影響を小さくしようとするもので
ある。The human body detection device of the present invention sets a threshold for detecting the rising time from each output of the plurality of infrared detection elements,
It is variable depending on the magnitude of the peak value of the output of each infrared detecting element. In other words, when the peak value is large, the threshold is increased, and when the peak value is small, the threshold is decreased, and the threshold is determined for each infrared detection element. By making the required time constant, it is intended to reduce the influence of sensitivity variations among a plurality of infrared detection elements.
以下、本発明の一実施例を図面に基づき説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。
本実施例は赤外線検出素子が４個の場合を示すものであ
るが、本発明は、４個以外の個数の赤外線検出素子を用
いた場合にも適用できる。FIG. 1 is a block diagram showing one embodiment of the present invention.
Although the present embodiment shows a case where the number of infrared detecting elements is four, the present invention can be applied to a case where a number of infrared detecting elements other than four is used.
１は光学系で、ミラーまた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
ラーまた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は赤外線検出素子部であり、４個
の焦電素子等よりなる赤外線検出素子Ａ〜Ｄを光学系１
の焦点面上に配置する。３は増幅部で、各赤外線検出素
子Ａ〜Ｄの出力を各々独立に増幅する。４は信号処理部
で、帯域フィルタを設け、各々の出力において必要な周
波数成分のみを抽出し、帯域フィルタを通過した各々の
出力はマルチプレクサとA/D変換器を用いて順次A/D変換
される。Reference numeral 1 denotes an optical system which collects infrared rays from a detection area using a mirror or a lens. In the case of this embodiment, infrared rays are condensed from a plurality of detection regions using a multi-segment mirror or a multi-segment lens. Reference numeral 2 denotes an infrared detecting element unit, which includes four infrared detecting elements A to D each composed of four pyroelectric elements or the like.
On the focal plane. Reference numeral 3 denotes an amplifying unit for independently amplifying the output of each of the infrared detecting elements A to D. Reference numeral 4 denotes a signal processing unit which is provided with a bandpass filter and extracts only necessary frequency components from each output, and each output passing through the bandpass filter is sequentially A / D converted by using a multiplexer and an A / D converter. You.
５は判断部で、閾値設定部51と比較判断部52を含んで
なり、信号処理部４で処理された赤外線検出素子Ａ〜Ｄ
の各出力からピーク値ＶA〜ＶDと閾値ＶTA〜ＶTDおよび
出力時間tA〜tDを検出し、赤外線検出素子Ａ〜Ｄの出力
が閾値ＶTA〜ＶTDを越えたときの各出力の時間tA〜tDを
検出し、各出力の時間tA〜tDの時間差が所定の範囲内に
あるときには人体が存在すると判断するものである。Reference numeral 5 denotes a determination unit which includes a threshold setting unit 51 and a comparison determination unit 52, and detects the infrared detecting elements A to D processed by the signal processing unit 4.
From the respective outputs, the peak values VA to VD, the threshold values VTA to VTD, and the output times tA to tD are detected, and the output times tA to tD when the outputs of the infrared detection elements A to D exceed the threshold values VTA to VTD are determined. If a time difference between the times tA to tD of the respective outputs is within a predetermined range, it is determined that a human body is present.
閾値設定部51は、信号処理部４で処理された赤外線検
出素子Ａ〜Ｄの各出力より、各ピーク値ＶA〜ＶDを用い
てその大小に基づき閾値ＶTA〜ＶTDを求めるのである。
つまり、一般に、赤外線検出素子Ａ〜Ｄには各々の感度
にばらつきがあり、同じ強さの赤外線が入力されても、
出力のピーク値ＶA〜ＶDがばらつくので、第２図のよう
に、信号の立ち上がり時刻を決めるための閾値を一定値
ＶTとしておくと、信号入力開始点t0から信号の立ち上
がり時刻と判断される時点tA〜tDまでの立ち上がりに要
する時間ＴA〜ＴDにばらつきが生じてしまう。第３図
（ａ）の例の場合は、異なるピーク値ＶP1、ＶP2に対す
る立ち上がり時刻が各々t1およびt2のように異なってし
まう。しかしながら、複数の赤外線検出素子Ａ〜Ｄを用
いて人体を検出する本方式の人体検知装置においては、
出力時刻（信号の立ち上がり時刻）tA〜tDの相互関係に
より人体検出の判断をおこなっているので、出力時刻tA
〜tDの素子間のばらつきをなくす必要がある。そこで、
本実施例では、赤外線検出素子Ａ〜Ｄの感度にばらつき
があり、ピーク値ＶA〜ＶDがばらついても、出力時刻tA
〜tDにばらつきが生じないようにしている。第３図
（ｂ）の例の場合は、異なるピーク値ＶP1、ＶP2に対し
て、各々の閾値をＶT1、ＶT2と異なった値に設定してい
る。つまり、大きいピーク値には大きい閾値を、小さい
ピーク値には小さい閾値を設定することにより、立ち上
がり時刻を時刻t3というように一定にすることができ
る。従って、第４図に示すように、ピーク値ＶA、ＶCの
ように大きいピーク値の場合は、その閾値ＶTA、ＶTCも
その値に応じて大きくし、ピーク値ＶB、ＶDのように小
さいピーク値の場合は、その閾値ＶTB、ＶTDもその値に
応じて小さくすることにより、信号入力開始点t0から信
号の立ち上がり時刻tA〜tDまでの時間Ｔが一定になるよ
うにしている。具体的には、例えば、信号の立ち上がり
をリニアと仮定すれば、下記の式に基づいて、各ピーク
値ＶA〜ＶDから閾値ＶTA〜ＶTDを求めればよい。The threshold setting unit 51 obtains the thresholds VTA to VTD from the respective outputs of the infrared detection elements A to D processed by the signal processing unit 4 using the respective peak values VA to VD based on the magnitude thereof.
That is, in general, the sensitivity of each of the infrared detection elements A to D varies, and even if infrared rays having the same intensity are input,
Since the peak values VA to VD of the output vary, as shown in FIG. 2, if the threshold value for determining the rising time of the signal is set to a constant value VT, the time when it is determined that the rising time of the signal from the signal input start point t0 is reached. The time TA to TD required for the rise from tA to tD varies. For example FIG. 3 (a), the rise time for different peak values VP1, VP2 resulting in each different as t 1 and t 2. However, in the human body detection device of the present system that detects a human body using a plurality of infrared detection elements A to D,
Since the human body detection is determined based on the correlation between the output times (signal rise times) tA to tD, the output time tA
It is necessary to eliminate variations between elements of ~ tD. Therefore,
In the present embodiment, even when the sensitivities of the infrared detecting elements A to D vary and the peak values VA to VD vary, the output time tA
TtD is not varied. In the case of the example of FIG. 3B, the thresholds are set to different values from VT1 and VT2 for different peak values VP1 and VP2. That is, a large threshold on the large peak value, by setting a small threshold for small peak value can be kept constant so that the time t 3 the rise time. Therefore, as shown in FIG. 4, in the case of a large peak value such as the peak values VA and VC, the threshold values VTA and VTC are also increased according to the values, and the small peak values such as the peak values VB and VD are obtained. In the case of (1), the thresholds VTB and VTD are also reduced in accordance with the values, so that the time T from the signal input start point t0 to the signal rising time tA to tD becomes constant. Specifically, for example, assuming that the rising of the signal is linear, the threshold values VTA to VTD may be obtained from the respective peak values VA to VD based on the following equation.
（ピーク値Vi）／（閾値ＶTi）＝定数 但し i:A,B,C,D ６は出力部で、判断部５からの判定結果を出力するも
のである。(Peak value Vi) / (threshold value VTi) = constant where i: A, B, C, D 6 is an output unit for outputting the judgment result from the judgment unit 5.
次に、本実施例の動作を説明する。複数の赤外線検出
素子Ａ〜Ｄ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を通じて複数の検知領域が焦点
面上の赤外線検出素子Ａ〜Ｄの配置と同じ配置で形成さ
れ、検知領域内における人体の移動により、各々の赤外
線検出素子Ａ〜Ｄが背景との温度差の変化として出力を
生じる。赤外線検出素子Ａ〜Ｄからの出力は、増幅部３
で増幅され、信号処理部４で人体検出に適した信号に処
理され、判断部５に入力される。Next, the operation of this embodiment will be described. By arranging the plurality of infrared detection elements A to D on the focal plane of the optical system 1, the plurality of detection areas on the object surface are the same as the arrangement of the infrared detection elements A to D on the focal plane through the optical system 1. Each of the infrared detecting elements A to D generates an output as a change in the temperature difference from the background due to the movement of the human body in the detection area. The outputs from the infrared detection elements A to D are output to the amplification unit 3
The signal is amplified by the signal processing unit 4, processed into a signal suitable for human body detection by the signal processing unit 4, and input to the determination unit 5.
判断部５内の閾値設定部51では、各赤外線検出素子Ａ
〜Ｄからのピーク値ＶA〜ＶDを用いて、各ピーク値ＶA
〜ＶDの大きさがばらついても信号入力開始点t0から信
号の立ち上がり時刻tA〜tDまでの時間Ｔが一定になるよ
うな閾値ＶTA〜ＶTDが求められる。比較判断部52では、
この閾値ＶTA〜ＶTDを用いて、各赤外線検出素子Ａ〜Ｄ
からの出力時刻tA〜tDが求められ、これらを相互に比較
し、各赤外線検出素子Ａ〜Ｄからの出力の立ち上がりの
順序等により人体の有無を判定する。In the threshold setting unit 51 in the judgment unit 5, each infrared detecting element A
Using the peak values VA to VD from.
The threshold values VTA to VTD are determined so that the time T from the signal input start point t0 to the rising time tA to tD of the signal is constant even if the magnitude of VD varies. In the comparison judgment unit 52,
Using the threshold values VTA to VTD, each of the infrared detecting elements A to D
Are obtained, and these are compared with each other, and the presence or absence of a human body is determined based on the order of rising of the outputs from the infrared detection elements A to D.
また、閾値設定部51内に各赤外線検出素子Ａ〜Ｄ毎の
ピーク値記憶部を設け、各赤外線検出素子Ａ〜Ｄ毎の過
去から現在にわたってのピーク値の平均値を求め、その
値をピーク値ＶA〜ＶDとして用い、閾値ＶTA〜ＶTDを求
めれば、周囲温度等の周囲の環境によるピーク値ＶA〜
ＶDのばらつきの影響を抑え、赤外線検出素子Ａ〜Ｄの
みのばらつきの影響を補正することができるのである。Further, a peak value storage unit for each of the infrared detection elements A to D is provided in the threshold value setting unit 51, and an average value of the peak values from the past to the present for each of the infrared detection elements A to D is obtained. If the threshold values VTA to VTD are obtained by using the values VA to VD, the peak values VA to V
The effect of the variation in VD can be suppressed, and the effect of the variation in only the infrared detection elements A to D can be corrected.
また、第５図に示すように、人体検出装置内部にニク
ロム線等の標準熱源７と標準熱源７からの赤外線を各赤
外線検出素子Ａ〜Ｄに導くための補助光学系８とを装備
し、この標準熱源７からの赤外線出力を用いて各赤外線
検出素子Ａ〜Ｄの閾値ＶTA〜ＶTDを求めれば、周囲温度
等の周囲の環境によるピーク値ＶA〜ＶDのばらつきの影
響を抑え、赤外線検出素子Ａ〜Ｄのみのばらつきの影響
を補正することができるのである。Also, as shown in FIG. 5, a standard heat source 7 such as a nichrome wire and an auxiliary optical system 8 for guiding infrared rays from the standard heat source 7 to each of the infrared detecting elements A to D are provided inside the human body detecting device. If the threshold values VTA to VTD of the infrared detecting elements A to D are obtained using the infrared output from the standard heat source 7, the influence of the variation of the peak values VA to VD due to the surrounding environment such as the ambient temperature can be suppressed, and the infrared detecting element can be controlled. It is possible to correct the influence of the variation of only A to D.
以上のように本発明によれば、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
を受光する複数の赤外線検出素子と、前記複数の赤外線
検出素子の各出力を各々増幅する増幅部と、前記増幅部
にて増幅された赤外線検出素子の各出力を人体検出に適
した信号に処理する信号処理部と、前記信号処理部によ
り処理された赤外線検出素子の閾値を設定し、前記複数
の赤外線検出素子の出力が前記閾値を越えたときの力時
刻の時間差が所定の範囲内であるときには人体が存在す
ると判断する判断部と、前記判断部の判断結果を出力す
る出力部とを有して成る人体検出装置であって、前記判
断部における出力時刻を判断するための閾値を、前記複
数の赤外線検出素子において、各素子毎にその出力の過
去から現在にわたっての平均値を求め、前記平均値に対
して所定比となるように前記赤外線検出素子毎に設定す
るようにしたので、各赤外線検出素子の感度のばらつき
に影響されない信頼性の高い人体検出装置が提供でき
た。As described above, according to the present invention, an optical system that collects infrared light from a detection area, a plurality of infrared detection elements that receive infrared light collected by the optical system, and a plurality of infrared detection elements An amplification unit for amplifying each output, a signal processing unit for processing each output of the infrared detection element amplified by the amplification unit into a signal suitable for human body detection, and an infrared detection element processed by the signal processing unit A determination unit that determines that a human body is present when a time difference between force times when the outputs of the plurality of infrared detection elements exceed the threshold value is within a predetermined range; and a determination result of the determination unit. And an output unit for outputting a threshold value for determining the output time in the determination unit, wherein the plurality of infrared detection elements, from the past of the output for each element to the present Niwatta The average value is determined for each of the infrared detection elements so as to have a predetermined ratio with respect to the average value.Therefore, a highly reliable human body detection device that is not affected by variations in the sensitivity of each infrared detection element is provided. Could be provided.
第１図は、本発明の一実施例を示すブロック図、 第２図乃至第４図は、同上の動作説明のための波形図、 第５図は、本発明の他の実施例を示すブロック図、 第６図は、従来例を示すブロック図である。 １……光学系、２……赤外線検出素子部 Ａ〜Ｄ……赤外線検出素子 ３……増幅部、４……信号処理部 ５……判断部、51……閾値設定部 52……比較判断部、６……出力部 ７……標準熱源、８……補助光源 FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 to 4 are waveform diagrams for explaining the operation of the embodiment, and FIG. 5 is a block diagram showing another embodiment of the present invention. FIG. 6 is a block diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Optical system, 2 ... Infrared detection element part A-D ... Infrared detection element 3 ... Amplifier part, 4 ... Signal processing part 5 ... Judgment part, 51 ... Threshold setting part 52 ... Comparison judgment Unit 6 Output unit 7 Standard heat source 8 Auxiliary light source
───────────────────────────────────────────────────── フロントページの続き (72)発明者 姫澤 秀和 大阪府門真市大字門真1048番地 松下電 工株式会社内 (56)参考文献 特開 昭58−213396（ＪＰ，Ａ) 特開 昭63−144222（ＪＰ，Ａ) 特開 昭64−84179（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidekazu Himezawa 1048 Odakadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (56) References JP-A-58-213396 (JP, A) JP-A-63- 144222 (JP, A) JP-A-64-84179 (JP, A)
Claims (1)
と、前記光学系にて集光された赤外線を受光する複数の
赤外線検出素子と、前記複数の赤外線検出素子の各出力
を各々増幅する増幅部と、前記増幅部にて増幅された赤
外線検出素子の各出力を人体検出に適した信号に処理す
る信号処理部と、前記信号処理部により処理された赤外
線検出素子の閾値を設定し、前記複数の赤外線検出素子
の出力が前記閾値を越えたときの出力時刻の時間差が所
定の範囲内であるときには人体が存在すると判断する判
断部と、前記判断部の判断結果を出力する出力部とを有
して成る人体検出装置であって、前記判断部における出
力時刻を判断するための閾値を、前記複数の赤外線検出
素子において、各素子毎にその出力の過去から現在にわ
たってのピーク値の平均値を求め、前記平均値に対して
所定比となるように前記赤外線検出素子毎に設定するよ
うにしたことを特徴とする人体検出装置。An optical system for collecting infrared light from a detection area, a plurality of infrared detection elements for receiving the infrared light collected by the optical system, and amplifying each output of the plurality of infrared detection elements. Amplifying section, a signal processing section for processing each output of the infrared detection element amplified by the amplification section into a signal suitable for human body detection, and setting a threshold value of the infrared detection element processed by the signal processing section. A determination unit that determines that a human body is present when a time difference between output times when the outputs of the plurality of infrared detection elements exceed the threshold value is within a predetermined range; and an output unit that outputs a determination result of the determination unit. And a threshold for determining the output time in the determination unit, the plurality of infrared detection elements, the peak value of the output from the past to the present for each element for each element Seeking average value, human body detection device is characterized in that so as to set each said infrared detection element to a predetermined ratio to the average value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63158475A JP2621374B2 (en) | 1988-06-27 | 1988-06-27 | Human body detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63158475A JP2621374B2 (en) | 1988-06-27 | 1988-06-27 | Human body detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028779A JPH028779A (en) | 1990-01-12 |
| JP2621374B2 true JP2621374B2 (en) | 1997-06-18 |
Family
ID=15672554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63158475A Expired - Fee Related JP2621374B2 (en) | 1988-06-27 | 1988-06-27 | Human body detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2621374B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004085350A (en) * | 2002-08-27 | 2004-03-18 | Keyence Corp | Detector and its thresholding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58213396A (en) * | 1982-06-05 | 1983-12-12 | 竹中エンジニアリング工業株式会社 | Ommateal type burglarproof sensor system |
| JPS63144222A (en) * | 1986-12-08 | 1988-06-16 | Atsumi Denki Kk | Heat ray type intruder detector |
-
1988
- 1988-06-27 JP JP63158475A patent/JP2621374B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028779A (en) | 1990-01-12 |
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