JPH05253211A - Human body sensing device - Google Patents

Human body sensing device

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Publication number
JPH05253211A
JPH05253211A JP4054851A JP5485192A JPH05253211A JP H05253211 A JPH05253211 A JP H05253211A JP 4054851 A JP4054851 A JP 4054851A JP 5485192 A JP5485192 A JP 5485192A JP H05253211 A JPH05253211 A JP H05253211A
Authority
JP
Japan
Prior art keywords
output
signal
comparing
human body
output 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.)
Granted
Application number
JP4054851A
Other languages
Japanese (ja)
Other versions
JP2960244B2 (en
Inventor
Hiroyuki Ogino
弘之 荻野
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4054851A priority Critical patent/JP2960244B2/en
Publication of JPH05253211A publication Critical patent/JPH05253211A/en
Application granted granted Critical
Publication of JP2960244B2 publication Critical patent/JP2960244B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To distinguish person from object certainly by installing piezo element on a seat or bed, calculating at unit time intervals the rate of emergence at which the output signal from piezo element exceeds a certain specified value, and thereupon judging if the seat, etc., is occupied. CONSTITUTION:When a person is seated, a piezoelectric element 1 installed on a seat 6 defroms, and the voltage generated by piezoelectric effect is filtrated by a filter 2, amplified by an amplifying means 3, and smoothened by a smoothening means 4. First comparing means 7 compares the output V of the smoothening means 4 with a predetermined value Va and emits Hi-signal if V>=Va and a Lo-signal if V<Va. The first comparing means 8 calculates the rate of emergence per unit time of Hi outputs given by this first comparing means 7, while the second comparing means 9 emits Hi if the rate of emergence per unit time exceeds the second preset value and emits a Lo binary signal if below the second preset value. It is judged as occupied if this output is Hi and as not occupied if Lo.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、座席や寝具上での人体
の有無を検出する人体検出装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detecting device for detecting the presence or absence of a human body on a seat or bedding.

【0002】[0002]

【従来の技術】発明者は従来この種の人体検出手段が、
例えば座席に配設されたマイクロスイッチや赤外線セン
サ、或いは超音波センサにより人体を検出する構成であ
るため、座席に物が置かれた場合もその荷重でスイッチ
が入ったり、人が物を置く動作により生じる赤外線や超
音波の変化を検出して誤って人体検出するといった課題
があったことを考慮し、この課題を解決するため人と物
とを確実に区別する人体検出装置の出願を先に行った。
2. Description of the Related Art The inventor has heretofore used this type of human body detecting means.
For example, since the human body is detected by a micro switch, an infrared sensor, or an ultrasonic sensor installed in the seat, even when an object is placed on the seat, the switch is turned on by the load or the operation of the person placing the object. Considering that there was a problem of erroneously detecting the human body by detecting changes in infrared rays and ultrasonic waves caused by, the application of a human body detection device that reliably distinguishes humans from objects in order to solve this problem went.

【0003】図6はその際に示した人体の着座検出に応
用した人体検出装置のブロック図である。人体が着座す
ると座席6に配設された圧電素子1が人体の体動により
変形を受け、圧電効果により電圧が発生する。フィルタ
ー2により圧電素子1の出力信号のある特定の周波数成
分がろ波され、増幅手段3により増幅され、平滑化手段
4により平滑化される。図2に実際の着座の際の平滑化
手段4の出力信号波形を示す。図2より着座、手足の動
き、離座といった粗体動の場合は全身にわたる動作であ
るので圧電素子1は大きな変形を受けて平滑化手段4か
らは大きな信号波形がでるが、着座した人が安静状態を
保っていると人体の心臓の活動や呼吸活動により伝搬さ
れる身体の微小な体動により図2のS1部のような比較
的低レベルの信号が出力される。また、図2に示すよう
に物を座席6に置いた場合は、置いた直後は大きな出力
がでるが、物には上記のような心臓の活動や呼吸活動が
ないので図2のS1部のような出力はでない。このよう
な出力信号に基づき、判定手段5では平滑化手段4から
の出力Vが図2のVa以上である状態がT時間以上継続
すれば人が着座していると判定し、それ以外であれば不
在であると判定する。すなわち、座席6に配設した圧電
素子1により、着座した人の安静状態での心臓の活動や
呼吸活動により伝搬される身体の微小な体動を検出し
て、物が置かれた場合との区別を行い人体の存在を検出
するものであった。Vaは被験者実験でS部の最低レベ
ルを求めることにより決定することができる。
FIG. 6 is a block diagram of a human body detecting device applied to the seating detection of the human body shown at that time. When the human body is seated, the piezoelectric element 1 arranged on the seat 6 is deformed by the body motion of the human body, and a voltage is generated by the piezoelectric effect. A specific frequency component of the output signal of the piezoelectric element 1 is filtered by the filter 2, amplified by the amplification means 3, and smoothed by the smoothing means 4. FIG. 2 shows an output signal waveform of the smoothing means 4 at the time of actual seating. As shown in FIG. 2, in the case of coarse body movement such as sitting, limb movement, and sitting, the movement is over the whole body, so that the piezoelectric element 1 is greatly deformed and a large signal waveform is output from the smoothing means 4. When the person is in a resting state, a relatively low level signal such as the portion S1 in FIG. 2 is output due to minute body movements of the body propagated by the activity of the heart and the respiratory activity of the human body. Further, when an object is placed on the seat 6 as shown in FIG. 2, a large output is obtained immediately after the object is placed, but since the object does not have the heart activity and the respiratory activity as described above, the S1 part of FIG. There is no such output. Based on such an output signal, the determination means 5 determines that a person is seated if the output V from the smoothing means 4 is equal to or higher than Va in FIG. If it is absent, it is determined to be absent. That is, the piezoelectric element 1 arranged on the seat 6 detects minute body movements of the body propagated by the activity of the heart and the respiratory activity of the seated person in a resting state, and the case where an object is placed The distinction was made and the presence of the human body was detected. Va can be determined by obtaining the lowest level of S part in a subject experiment.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記技
術の人体検出装置では、人の座る位置や個人的な属性に
より心臓の活動や呼吸活動による身体の微小な体動が圧
電素子1に伝搬されにくいことがあり、実際には人が存
在していても平滑化手段4の出力VがVa未満になり不
在の判定が行われるといった実用上の課題があった。
However, in the human body detection device of the above technique, minute body movements of the body due to the activity of the heart or respiratory activity are not easily propagated to the piezoelectric element 1 depending on the sitting position of the person and personal attributes. However, there is a practical problem that the output V of the smoothing means 4 becomes less than Va even if a person is present, and the absence is determined.

【0005】本発明の第1の目的は、人の座る位置や個
人的な属性により生じる誤動作を低減する実用的な人体
検出装置を提供することにある。また、本発明の第2の
目的はさらに検出精度の向上を図ることにある。
A first object of the present invention is to provide a practical human body detecting apparatus which reduces malfunctions caused by a sitting position of a person and personal attributes. A second object of the present invention is to further improve the detection accuracy.

【0006】[0006]

【課題を解決するための手段】本発明は上記の目的を達
成するために、座席や寝具に配設された圧電素子と、前
記圧電素子の出力信号のある特定の周波数成分をろ波す
るフィルターと、前記フィルターの出力信号を増幅する
増幅手段と、前記増幅手段の出力信号を平滑化する平滑
化手段と、前記平滑化手段の出力信号と予め定められた
第1の設定値とを比較してHi、Loの2値信号を出力
する第1の比較手段と、前記第1の比較手段から出力さ
れる2値信号各々の単位時間当たりの出現率を演算する
第1の演算手段と、前記第1の演算手段の出力信号と予
め定められた第2の設定値とを比較してHi、Loの2
値信号を出力する第2の比較手段とからなる。
In order to achieve the above object, the present invention provides a piezoelectric element arranged in a seat or bedding and a filter for filtering a specific frequency component of an output signal of the piezoelectric element. Comparing the output signal of the smoothing means with a predetermined first set value; an amplifying means for amplifying the output signal of the filter; a smoothing means for smoothing the output signal of the amplifying means; And a first computing means for computing a rate of appearance of each binary signal output from the first comparing means per unit time; The output signal of the first computing means is compared with a predetermined second set value to determine Hi and Lo of 2
And a second comparing means for outputting a value signal.

【0007】また本発明は、第2の比較手段から出力さ
れる2値信号各々の予め定められた設定時間当たりの出
現率を演算する第2の演算手段と、前記第2の演算手段
の出力信号と予め定められた第3の設定値とを比較して
Hi、Loの2値信号を出力する第3の比較手段とから
なる。
According to the present invention, the second calculating means calculates the appearance rate of each binary signal output from the second comparing means per a predetermined set time, and the output of the second calculating means. It comprises a third comparing means for comparing the signal with a predetermined third set value and outputting a binary signal of Hi and Lo.

【0008】[0008]

【作用】本発明は上記構成によって以下のように作用す
る。人体が着座すると座席に配設された圧電素子が人体
の体動により変形を受け、圧電効果により電圧が発生す
る。フィルターにより前記圧電素子の出力信号のある特
定の周波数成分がろ波され、増幅手段により増幅され、
平滑化手段により平滑化される。第1の比較手段では平
滑化手段の出力信号が予め定められた第1の設定値以上
であればHi、それ未満であればLoの2値信号が出力
される。第1の演算手段では第1の比較手段から出力さ
れる2値信号各々の単位時間当たりの出現率が演算され
る。第2の比較手段では前記第1の演算手段の出力信号
が予め定められた第2の設定値以上であればHi、それ
未満であればLoの2値信号が出力される。この出力が
Hiであれば人体が存在していることを示す。
The present invention operates as follows with the above construction. When the human body is seated, the piezoelectric element arranged on the seat is deformed by the body movement of the human body, and a voltage is generated by the piezoelectric effect. A certain frequency component of the output signal of the piezoelectric element is filtered by the filter and amplified by the amplification means,
It is smoothed by the smoothing means. The first comparison means outputs a binary signal of Hi if the output signal of the smoothing means is equal to or larger than a predetermined first set value, and Lo if it is less than the predetermined first set value. The first calculating means calculates the appearance rate per unit time of each of the binary signals output from the first comparing means. The second comparing means outputs a binary signal of Hi if the output signal of the first computing means is equal to or larger than a predetermined second set value, and Lo if it is less than the preset second set value. If this output is Hi, it means that a human body is present.

【0009】また本発明は、第2の演算手段により第2
の比較手段から出力される2値信号各々の予め定められ
た設定時間当たりの出現率が演算され、第3の比較手段
により前記第2の演算手段の出力信号が予め定められた
第3の設定値以上であればHi、それ未満であればLo
の2値信号が出力される。この出力がHiであれば人体
が存在していることを示す。
Further, according to the present invention, the second operation means provides a second operation.
The appearance rate per preset time of each of the binary signals output from the comparing means is calculated, and the output signal of the second calculating means is predetermined by the third comparing means to the third setting. If the value is greater than or equal to the value, Hi, and if less
The binary signal of is output. If this output is Hi, it means that a human body is present.

【0010】[0010]

【実施例】以下本発明の実施例を添付図面に基づいて説
明する。図1は本実施例を人体の着座検出に応用した際
の人体検出装置のブロック図である。図1において、1
は圧電素子、2はフィルター、3は増幅手段、4は平滑
化手段、7は第1の比較手段、8は第1の演算手段、9
は第2の比較手段である。圧電素子1はポリフッ化ビニ
リデン(PVDF)等の高分子圧電材料を薄膜状にし両
面に可とう性の電極膜を付着させテープ状に成形された
もので、ここでは座席6の表布下に配設している。
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a human body detection apparatus when the present embodiment is applied to human body seating detection. In FIG. 1, 1
Is a piezoelectric element, 2 is a filter, 3 is amplification means, 4 is smoothing means, 7 is first comparing means, 8 is first computing means, and 9 is
Is a second comparing means. The piezoelectric element 1 is formed by forming a polymer piezoelectric material such as polyvinylidene fluoride (PVDF) into a thin film and attaching a flexible electrode film on both sides to form a tape. Here, the piezoelectric element 1 is arranged under the seat cloth of the seat 6. is doing.

【0011】上記実施例の構成による作用を以下に説明
する。人体が着座すると座席6に配設された圧電素子1
が人体の体動により変形を受け、圧電効果により電圧が
発生する。フィルター2により圧電素子1の出力信号の
ある特定の周波数成分がろ波され、増幅手段3により増
幅され、平滑化手段4により平滑化される。図2に実際
の着座の際の平滑化手段4の出力信号波形を示す。図2
より着座、手足の動き、離座といった粗体動の場合は全
身にわたる動作であるので圧電素子1は大きな変形を受
けて平滑化手段4からは大きな信号波形がでるが、着座
した人が安静状態を保っていると人体の心臓の活動や呼
吸活動により伝搬される身体の微小な体動により図2の
S1部のような比較的レベルの低い出力がでる。また、
図2に示すように物を座席6に置いた場合は、置いた直
後は大きな出力がでるが、物には上記のような心臓の活
動や呼吸活動がないので図2のS1部のような出力はで
ない。このような出力信号に基づき、第1の比較手段7
では平滑化手段4からの出力Vが図2のVa以上であれ
ばHi、VがVa未満であればLoの2値信号を出力す
る。
The operation of the configuration of the above embodiment will be described below. Piezoelectric element 1 disposed on seat 6 when a human body is seated
Is deformed by the movement of the human body, and a voltage is generated by the piezoelectric effect. A specific frequency component of the output signal of the piezoelectric element 1 is filtered by the filter 2, amplified by the amplification means 3, and smoothed by the smoothing means 4. FIG. 2 shows an output signal waveform of the smoothing means 4 at the time of actual seating. Figure 2
In the case of coarse body movement such as sitting, limb movement, and sitting, the movement is over the whole body, so the piezoelectric element 1 is greatly deformed and a large signal waveform is output from the smoothing means 4, but the seated person is in a resting state. If maintained, the output of a comparatively low level as shown by S1 portion in FIG. 2 is produced due to the minute body movement of the body propagated by the activity of the human heart and the respiratory activity. Also,
When an object is placed on the seat 6 as shown in FIG. 2, a large output is obtained immediately after the object is placed, but since the object does not have the above-described cardiac activity and respiratory activity, it is similar to the S1 part in FIG. There is no output. Based on such an output signal, the first comparison means 7
2 outputs a binary signal of Hi when the output V from the smoothing means 4 is Va or more in FIG. 2 and Lo when V is less than Va.

【0012】ここで、人の座る位置や個人的な属性によ
り心臓の活動や呼吸活動による身体の微小な体動が圧電
素子1に伝搬されにくいことがあり、実際には人が存在
していても図3に示すように平滑化手段4の出力VがV
a未満になり不在の判定が行われるといった実用上の課
題があった。この課題を解決するための本実施例の作用
を図3に基づいて説明する。尚、図3においてVは平滑
化手段4の出力、X1は第1の比較手段7の出力、Y1
は第1の演算手段8の出力、X2は第2の比較手段9の
出力を表す。図3において、第1の比較手段7では平滑
化手段4の出力VがVaと比較され、V≧VaならばH
i、V<VaならばLoの信号が出力される。第1の演
算手段8では第1の比較手段7から出力されるHi出力
の単位時間To当たりの出現率Y1が演算される。第2
の比較手段9ではY1が予め定められた第2の設定値Y
a以上であればHi、それ未満であればLoの2値信号
が出力される。そしてこの出力がHiであれば在席、L
oであれば不在であることを示す。図3の場合、例えば
時刻t0〜t1、t1〜t2ではY1<Yaであるので
不在、時刻t3〜t4、t4〜t5ではY1≧Yaであ
るので在席と判定される。Va及びYaは被験者実験に
より決定することができるが、手動で設定変更できるよ
うな設定変更手段を設けてもよい。
[0012] Here, there are cases where minute body movements of the body due to heart activity and respiratory activity are difficult to propagate to the piezoelectric element 1 depending on the sitting position of the person and personal attributes. Also, as shown in FIG. 3, the output V of the smoothing means 4 is V
There was a practical problem that it was less than a and the absence was determined. The operation of this embodiment for solving this problem will be described with reference to FIG. In FIG. 3, V is the output of the smoothing means 4, X1 is the output of the first comparing means 7, and Y1.
Represents the output of the first calculating means 8 and X2 represents the output of the second comparing means 9. In FIG. 3, the first comparison means 7 compares the output V of the smoothing means 4 with Va, and if V ≧ Va, then H
If i, V <Va, the Lo signal is output. The first calculation means 8 calculates the appearance rate Y1 of the Hi output output from the first comparison means 7 per unit time To. Second
In the comparison means 9 of Y, Y1 is the second set value Y determined in advance.
A binary signal of Hi is output if a or more, and a Lo signal of Lo is output if less than a. If this output is Hi, then seated, L
If it is o, it means that the person is absent. In the case of FIG. 3, for example, Y1 <Ya is absent at times t0 to t1 and t1 to t2, and absent, and Y1 ≧ Ya is determined at times t3 to t4 and t4 to t5, so that it is determined to be present. Va and Ya can be determined by a subject experiment, but a setting changing means that can manually change the setting may be provided.

【0013】上記作用により、人の座る位置や個人的な
属性によって着座した人の安静状態での心臓の活動や呼
吸活動により伝搬される身体の微小な体動が圧電素子1
に伝搬されにくい場合があっても、単位時間毎に圧電素
子1からの出力信号がある設定値以上になる出現率を演
算して在席の判定を行うので、誤動作なく人の有無を判
定することができるといった効果がある。
Due to the above-mentioned action, minute body movements of the body propagated by the activity of the heart and the respiratory activity in the resting state of the seated person depending on the sitting position of the person and personal attributes, are piezoelectric elements 1.
Even if there is a case where it is difficult to propagate to the user, since the appearance rate at which the output signal from the piezoelectric element 1 becomes a certain set value or more is calculated for each unit time and the presence of the person is determined, the presence or absence of the person is determined without malfunction. There is an effect that you can.

【0014】本発明の第2の実施例を図4及び図5を用
いて説明する。本実施例が上記第1の実施例と相違する
点は、第2の比較手段9から出力される2値信号各々の
予め定められた設定時間当たりの出現率を演算する第2
の演算手段10と、第2の演算手段10の出力信号と予
め定められた第3の設定値とを比較してHi、Loの2
値信号を出力する第3の比較手段11を有する点にあ
る。
A second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that the second appearance means calculates the appearance rate of each binary signal output from the second comparing means 9 per a predetermined set time.
2 of Hi and Lo by comparing the output signal of the second calculating means 10 and the third setting value determined in advance.
It has a third comparison means 11 for outputting a value signal.

【0015】ここで、第1の実施例ではY1とYaとの
大小により不在か在席かを判定していたが、人の座る位
置や個人的な属性によって着座した人の身体の微小な体
動が圧電素子1にほとんど伝搬されない場合があり、Y
aを実験的に求めても実際には在席しているのにY1<
Yaとなって不在と判定されてしまうといった課題があ
った。この課題を解決するための本実施例の作用を図5
に基づいて説明する。尚、図5においてVは平滑化手段
4の出力、X1は第1の比較手段7の出力、Y1は第1
の演算手段8の出力、X2は第2の比較手段9の出力、
Y2は第2の演算手段10の出力、X3は第3の比較手
段11の出力を表す。図5において、第1の比較手段7
では平滑化手段4の出力VがVaと比較され、V≧Va
ならばHi、V<VaならばLoの信号が出力される。
第1の演算手段8では第1の比較手段7から出力される
Hi出力の単位時間To当たりの出現率Y1が演算され
る。第2の比較手段9ではY1が予め定められた第2の
設定値Ya以上であればHi、それ未満であればLoの
2値信号が出力される。次に第2の演算手段10では第
2の比較手段9から出力されるHi出力の予め定められ
た設定時間T1当たりの出現率Y2が演算される。第3
の比較手段11ではY2と予め定められた第3の設定値
Ybとが比較されY2≧YbならばHi、Y2<Ybな
らばLoの出力がなされる。最終的な在席判定は、第3
の比較手段11の出力がHiならば在席、Loならば不
在となる。図5の場合では5つのToで1つのT1が構
成されており、例えば時刻t0〜t5ではX2は5つの
To期間全てでLoとなっており、Y2<Ybであるの
で不在と判定される。時刻t5〜t10、t10〜t1
5ではX2は5つのTo期間のうちで少なくとも3つの
期間がHiとなっており、Y1≧Yaであるので在席と
判定される。Va、Ya及びYbは被験者実験により決
定することができるが、手動で設定変更できるような設
定変更手段を設けてもよい。
Here, in the first embodiment, it is determined whether the person is absent or seated based on the size of Y1 and Ya. However, the minute body of the seated person is determined by the sitting position of the person and personal attributes. Motion may be hardly transmitted to the piezoelectric element 1, and Y
Even if I experimentally obtained a, Y1 <
There is a problem that it becomes Ya and is judged to be absent. The operation of this embodiment for solving this problem is shown in FIG.
It will be explained based on. In FIG. 5, V is the output of the smoothing means 4, X1 is the output of the first comparison means 7, and Y1 is the first.
The output of the calculation means 8 of X, the output of the second comparison means 9 is X2,
Y2 represents the output of the second calculating means 10, and X3 represents the output of the third comparing means 11. In FIG. 5, the first comparison means 7
Then, the output V of the smoothing means 4 is compared with Va, and V ≧ Va
If so, a Hi signal is output, and if V <Va, a Lo signal is output.
The first calculation means 8 calculates the appearance rate Y1 of the Hi output output from the first comparison means 7 per unit time To. The second comparison means 9 outputs a binary signal of Hi when Y1 is equal to or larger than a predetermined second set value Ya, and Lo when it is less than Y2. Next, the second calculating means 10 calculates the appearance rate Y2 of the Hi output output from the second comparing means 9 per a predetermined set time T1. Third
The comparison means 11 compares Y2 with a predetermined third set value Yb, and outputs Hi when Y2 ≧ Yb, and outputs Lo when Y2 <Yb. The final seating decision is the third
If the output of the comparison unit 11 is Hi, the person is present, and if Lo is Lo, the person is absent. In the case of FIG. 5, one T1 is composed of five Tos, and, for example, at times t0 to t5, X2 is Lo in all five To periods, and Y2 <Yb is satisfied, so it is determined that there is none. Time t5 to t10, t10 to t1
In No. 5, X2 is Hi for at least three periods out of the five To periods and Y1 ≧ Ya. Va, Ya, and Yb can be determined by a subject experiment, but a setting changing unit that can manually change the setting may be provided.

【0016】上記作用により、人の座る位置や個人的な
属性によって着座した人の身体の微小な体動が圧電素子
1にほとんど伝搬されない場合があっても、単位時間毎
に圧電素子1からの出力信号がある設定値以上になる出
現率を求め、一定期間毎に前記複数個の出現率に基づき
在席を判定するので、第1の実施例よりも精度よく在席
判定ができるといった効果がある。
Due to the above action, even if a small body motion of the body of a person who sits down is hardly propagated to the piezoelectric element 1 due to the sitting position of the person or personal attributes, the piezoelectric element 1 outputs from the piezoelectric element 1 every unit time. Since the appearance rate at which the output signal becomes equal to or higher than a certain set value is obtained and the presence is determined based on the plurality of appearance rates at regular intervals, the effect that the presence determination can be performed more accurately than in the first embodiment is achieved. is there.

【0017】上記実施例は、本発明を着座検出に応用し
たもので、ごく一般的には事務用椅子やソファ等に使用
して作業状態の管理、家庭での在室管理等に応用しても
よい。また、自動車、列車、旅客機等の座席管理として
の応用も可能である。さらに、本発明を寝具に装着すれ
ば、家庭、病院、施設、ホテル等での在床管理として、
あるいは寝室の空調機器、照明、音響機器等の制御入力
としての応用が可能である。
The above-mentioned embodiment is an application of the present invention to seating detection, and is generally applied to office chairs, sofas, etc. to manage the working state, to manage the presence of a person at home, etc. Good. It can also be applied as seat management for automobiles, trains, passenger planes, etc. Furthermore, if the present invention is attached to bedding, as bed management at home, hospital, facility, hotel, etc.,
Alternatively, it can be applied as a control input for an air conditioner, lighting, audio equipment, etc. in a bedroom.

【0018】[0018]

【発明の効果】以上説明したように本発明の人体検出装
置によれば次の効果が得られる。
As described above, according to the human body detecting apparatus of the present invention, the following effects can be obtained.

【0019】すなわち、人の座る位置や個人的な属性に
よって着座した人の安静状態での心臓の活動や呼吸活動
により伝搬される身体の微小な体動が圧電素子1に伝搬
されにくい場合があっても、単位時間毎に圧電素子1か
らの出力信号がある設定値以上になる出現率を演算して
在席の判定を行うので、誤動作なく人の有無を判定する
ことができるという効果がある。
In other words, depending on the sitting position of a person and personal attributes, there are cases where minute body movements of the body propagated by heart activity and respiratory activity in a resting state of the person are difficult to propagate to the piezoelectric element 1. However, since the appearance rate at which the output signal from the piezoelectric element 1 is equal to or higher than a set value is calculated for each unit time and the presence determination is performed, the presence or absence of a person can be determined without malfunction. ..

【0020】また、単位時間毎に圧電素子1からの出力
信号がある設定値以上になる出現率を求め、一定期間毎
に前記複数個の出現率に基づき在席を判定するので、精
度よく在席判定ができるという効果がある。
Further, since the appearance rate at which the output signal from the piezoelectric element 1 is above a certain set value is obtained for each unit time, and the presence is determined based on the plurality of appearance rates at a constant period, the presence is accurately determined. There is an effect that seat determination can be performed.

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

【図1】本発明の第1の実施例における人体検出装置の
ブロック図
FIG. 1 is a block diagram of a human body detection device according to a first embodiment of the present invention.

【図2】同装置における平滑化手段の出力信号の波形図FIG. 2 is a waveform diagram of an output signal of a smoothing unit in the same device.

【図3】同装置における平滑化手段の出力信号の波形図
と第1の比較手段、第1の演算手段及び第2の比較手段
の出力結果を示す図
FIG. 3 is a diagram showing a waveform diagram of an output signal of a smoothing means and output results of a first comparing means, a first calculating means and a second comparing means in the same apparatus.

【図4】本発明の第2の実施例における人体検出装置の
ブロック図
FIG. 4 is a block diagram of a human body detection device according to a second embodiment of the present invention.

【図5】同装置における平滑化手段の出力信号の波形図
と第1の比較手段、第1の演算手段、第2の比較手段、
第2の演算手段及び第3の比較手段の出力結果を示す図
FIG. 5 is a waveform diagram of the output signal of the smoothing means in the same apparatus, a first comparing means, a first calculating means, a second comparing means,
The figure which shows the output result of a 2nd calculating means and a 3rd comparing means.

【図6】従来の人体検出装置におけるブロック図FIG. 6 is a block diagram of a conventional human body detection device.

【符号の説明】[Explanation of symbols]

1 圧電素子 2 フィルター 3 増幅手段 4 平滑化手段 5 判定手段 6 座席 7 第1の比較手段 8 第1の演算手段 9 第2の比較手段 10 第2の演算手段 11 第3の比較手段 DESCRIPTION OF SYMBOLS 1 Piezoelectric element 2 Filter 3 Amplifying means 4 Smoothing means 5 Judging means 6 Seat 7 First comparing means 8 First calculating means 9 Second comparing means 10 Second calculating means 11 Third comparing means

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 座席や寝具に配設された圧電素子と、前
記圧電素子の出力信号のある特定の周波数成分をろ波す
るフィルターと、前記フィルターの出力信号を増幅する
増幅手段と、前記増幅手段の出力信号を平滑化する平滑
化手段と、前記平滑化手段の出力信号と予め定められた
第1の設定値とを比較してHi、Loの2値信号を出力
する第1の比較手段と、前記第1の比較手段から出力さ
れる2値信号各々の単位時間当たりの出現率を演算する
第1の演算手段と、前記第1の演算手段の出力信号と予
め定められた第2の設定値とを比較してHi、Loの2
値信号を出力する第2の比較手段とからなる人体検出装
置。
1. A piezoelectric element disposed on a seat or bedding, a filter for filtering a specific frequency component of an output signal of the piezoelectric element, an amplification means for amplifying an output signal of the filter, and the amplification. Smoothing means for smoothing the output signal of the means, and first comparing means for comparing the output signal of the smoothing means with a predetermined first set value and outputting a binary signal of Hi and Lo. A first calculating means for calculating an appearance rate per unit time of each of the binary signals output from the first comparing means, an output signal of the first calculating means, and a second predetermined signal. 2 of Hi and Lo by comparing with the set value
A human body detecting device comprising a second comparing means for outputting a value signal.
【請求項2】 第2の比較手段から出力される2値信号
各々の予め定められた設定時間当たりの出現率を演算す
る第2の演算手段と、前記第2の演算手段の出力信号と
予め定められた第3の設定値とを比較してHi、Loの
2値信号を出力する第3の比較手段とからなる請求項1
記載の人体検出装置。
2. A second computing means for computing the appearance rate of each of the binary signals output from the second comparing means per a predetermined set time, and an output signal of the second computing means in advance. 3. A third comparing means for comparing a predetermined third set value and outputting a binary signal of Hi and Lo.
The human body detection device described.
JP4054851A 1992-03-13 1992-03-13 Human body detection device Expired - Fee Related JP2960244B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4054851A JP2960244B2 (en) 1992-03-13 1992-03-13 Human body detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4054851A JP2960244B2 (en) 1992-03-13 1992-03-13 Human body detection device

Publications (2)

Publication Number Publication Date
JPH05253211A true JPH05253211A (en) 1993-10-05
JP2960244B2 JP2960244B2 (en) 1999-10-06

Family

ID=12982103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4054851A Expired - Fee Related JP2960244B2 (en) 1992-03-13 1992-03-13 Human body detection device

Country Status (1)

Country Link
JP (1) JP2960244B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204167A (en) * 1994-01-24 1995-08-08 Matsushita Electric Ind Co Ltd Attendance device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222941A (en) * 1990-01-30 1991-10-01 Matsushita Electric Ind Co Ltd Sleeping judging apparatus
JPH0428352A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd Falling-asleep state judging device
JPH0428351A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd Falling-asleep state judging device
JPH0428344A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd On-bed state monitoring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222941A (en) * 1990-01-30 1991-10-01 Matsushita Electric Ind Co Ltd Sleeping judging apparatus
JPH0428352A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd Falling-asleep state judging device
JPH0428351A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd Falling-asleep state judging device
JPH0428344A (en) * 1990-05-25 1992-01-30 Matsushita Electric Ind Co Ltd On-bed state monitoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204167A (en) * 1994-01-24 1995-08-08 Matsushita Electric Ind Co Ltd Attendance device

Also Published As

Publication number Publication date
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