JPH0760185B2 - Seating sensor - Google Patents
Seating sensorInfo
- Publication number
- JPH0760185B2 JPH0760185B2 JP870592A JP870592A JPH0760185B2 JP H0760185 B2 JPH0760185 B2 JP H0760185B2 JP 870592 A JP870592 A JP 870592A JP 870592 A JP870592 A JP 870592A JP H0760185 B2 JPH0760185 B2 JP H0760185B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- human body
- detection
- seating sensor
- capacitance
- 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 - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims description 43
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000005406 washing Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 210000001217 buttock Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、人が座ったことを検出
する着座センサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seating sensor for detecting a person sitting.
【０００２】[0002]
【従来の技術】人が座ったことを検出する従来の着座セ
ンサとしては、導電ゴムを用い着座荷重により導電ゴム
を導通させて着座状態を検出する荷重式のもの、あるい
は光電センサを用い発光素子などからの光が人体で遮断
されたことから着座状態を検出する光電式のものなどが
ある。この種の着座センサは、例えば、温水洗浄便座に
おける使用状態の検出用、自動車、バス、飛行機あるい
は列車などの着座検出用、もしくはホールや劇場などの
着座検出用、さらにはマッージ椅子などに使用されてい
る。2. Description of the Related Art As a conventional seating sensor for detecting the sitting of a person, a conductive rubber is used to detect the seated state by conducting the conductive rubber by a seating load, or a light emitting element using a photoelectric sensor. There is a photoelectric type that detects the sitting state because the light from the human body is blocked. This type of seating sensor is used, for example, for detecting the state of use in a toilet seat that has been washed with warm water, for detecting seating in a car, bus, airplane, train, etc. ing.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記荷重式
の着座センサでは、確実に着座状態を検出することがで
きるようにするためには、取付位置が制約され、この導
電ゴムの取付位置によっては使い心地が悪くなるという
問題がある。しかも、その割りに確実に着座状態を検出
することができず、信頼性に欠けるという問題があっ
た。However, in the above-mentioned load type seating sensor, the mounting position is restricted in order to reliably detect the seated state. Depending on the mounting position of the conductive rubber, There is a problem that it becomes uncomfortable to use. Moreover, there is a problem that the seated state cannot be detected with certainty and the reliability is poor.
【０００４】また、光電式の着座センサの場合にも、取
付位置に制約を受け、また外乱光等による誤動作が起こ
るという問題があった。本発明は上述の点に鑑みて為さ
れたものであり、その目的とするところは、取付位置の
制約が少なく、使い心地に影響を与えず、且つ確実に着
座状態を検出できる着座センサを提供することにある。Further, in the case of the photoelectric type seating sensor, there is a problem that the mounting position is restricted and a malfunction occurs due to ambient light. The present invention has been made in view of the above points, and an object of the present invention is to provide a seating sensor that has few restrictions on the mounting position, does not affect the comfort of use, and can reliably detect the seated state. To do.
【０００５】[0005]
【課題を解決するための手段】本発明では、上記目的を
達成するため、人が座る着座部の人体が近接する部分に
取り付けられる検出電極と、上記着座部の人体が近接し
ない部分であり且つ検出電極と同一環境下に取り付けら
れる比較電極と、夫々の電極と大地との間の静電容量の
差分の変化から人体の着座状態を検出する検出回路とを
備えている。According to the present invention, in order to achieve the above object, a portion of a sitting portion on which a person sits is close to a human body.
The detection electrode to be attached is close to the human body
It is a part that does not exist and is installed in the same environment as the detection electrode.
Of the reference electrode and the capacitance between each electrode and ground.
And a detection circuit for detecting the sitting state of the human body from the change in the difference .
【０００６】また、必要な方向だけで着座状態を検出す
るために、人体が近接する方向以外の方向の静電容量結
合を遮断するシールド電極を設けることが好ましい。Further, in order to detect the seated state only in the necessary direction, it is preferable to provide a shield electrode for blocking the capacitive coupling in a direction other than the direction in which the human body approaches.
【０００７】[0007]
【作用】本発明は、上述のように静電容量変化から人体
の着座を検出することにより、検出電極と大地との間に
人が介在することにより静電容量が変化する部分であれ
ば、人体と検出電極との接触及び非接触状態であるとを
問わずに、いかなる場所にも検出電極を取り付けること
ができ、このため取付位置の制約を少なくでき、しかも
導電ゴムを用いた荷重方式のように人体に圧力を加える
構造を何等備えないことにより、使い心地に影響を与え
ず、さらに荷重式の場合のように取付状態により大きく
着座状態の検出感度が変動したり、光電式のように外乱
光による誤動作を行うこともないことにより、確実な着
座状態の検出が可能となる。According to the present invention, by detecting the sitting of the human body from the capacitance change as described above, if the capacitance changes due to the presence of a person between the detection electrode and the ground, The detection electrode can be attached to any place regardless of whether the human body is in contact with or not in contact with the detection electrode. Therefore, restrictions on the mounting position can be reduced, and the load method using conductive rubber can be used. Since there is no structure that applies pressure to the human body, it does not affect the comfort of use, and the detection sensitivity of the seated state varies greatly depending on the mounting state like the load type, or like the photoelectric type. Since there is no malfunction due to ambient light, it is possible to reliably detect the seated state.
【０００８】[0008]
（実施例１）図１乃至図４に本発明の一実施例を示す。
本実施例では、本発明の着座センサを図４に示す温水洗
浄便座Ａに適用した場合を例として説明する。この温水
洗浄便座Ａは、洋式の水洗便器の便座の代わりに取り付
け、温水を用いて用便後の局部の洗浄を行うことができ
るようにしたものである。この温水洗浄便座Ａの操作
は、便座３０の一側部の肘掛け部３１の上面に設けた操
作部３２のスイッチなどを操作すると、図示しない洗浄
ノズルから温水が噴出され、局部の洗浄が行われる。(Embodiment 1) FIGS. 1 to 4 show an embodiment of the present invention.
In this embodiment, a case where the seating sensor of the present invention is applied to the warm water washing toilet seat A shown in FIG. 4 will be described as an example. This warm water washing toilet seat A is attached in place of the toilet seat of a Western-style flush toilet so that hot water can be used to wash the local area after toilet. In operating the warm water washing toilet seat A, when a switch or the like of the operation unit 32 provided on the upper surface of the armrest 31 on one side of the toilet seat 30 is operated, hot water is ejected from a washing nozzle (not shown) to wash the local area. .
【０００９】この種の温水洗浄便座Ａでは、人が便座３
０に着座していない状態で、洗浄ノズルから温水などが
噴出されることは好ましくない。そこで、人が便座３０
に着座しているときだけ、操作部３２の操作が行えるよ
うにするために、着座センサが用いられる。また、この
種の温水洗浄便座Ａとしては冬期において便座３０を暖
房する機能を備えているものもあり、このような温水洗
浄便座Ａでは、不使用時にヒータの加熱状態を低くして
消費電力を少なくし、使用時にヒータの加熱状態を高め
るために、上記着座センサが用いられることもある。In this type of warm water flush toilet seat A, a person
It is not preferable that hot water or the like be ejected from the cleaning nozzle in the state where the user is not seated at 0. Then, the person
A seating sensor is used so that the operation unit 32 can be operated only when the user is seated on the seat. Further, there is a hot water washing toilet seat A of this type that has a function of heating the toilet seat 30 in the winter, and in such a hot water washing toilet seat A, the heating state of the heater is lowered to reduce power consumption when not in use. The seating sensor may be used in order to reduce the heating amount and enhance the heating state of the heater during use.
【００１０】さらに、上記着座センサは、用便後（人が
便座３０から離れたとき）、便座３０に被せられたシー
トペーパを自動供給する機能を備えるものでは、そのシ
ートペーパの供給制御のために用いられ、さらにまた消
臭装置あるいは用便中の音消しのための水流音発生装置
などを備えるものでは、着座時などにそれら装置を自動
的に駆動するためにも用いられる。Further, the seating sensor has a function of automatically supplying the sheet paper covered on the toilet seat 30 after the toilet has been used (when a person leaves the toilet seat 30), and for controlling the supply of the sheet paper. In addition, those equipped with a deodorizing device or a water flow sound generating device for mute sound in stool are also used for automatically driving those devices when sitting.
【００１１】[0011]
【００１２】[0012]
【００１３】[0013]
【００１４】なお、検出電極１は大腿部や臀部が近接す
る部分以外に、例えば背もたれ部、または体側の部分な
どの着座によって人体Ｘが近接する部分に設けてもよ
い。また、人体Ｘと非接触で検出を行う場合には、検出
電極１と検出物体Ｘとの間に絶縁物もしくは電気的に浮
いた状態にある導電物が介在しても問題はない。さら
に、検出電極は人体Ｘの近接部分に広範囲にわたり検出
できるようにすることが好ましい。このようにする場合
には図３に示すように複数の検出電極１を人体Ｘの近接
部に配置し、夫々の検出電極１をリード線５でつなげば
よい。なお、このようにしても検出回路２’の構成は何
等変える必要はない。The detection electrode 1 may be provided not only at the portion where the thighs and buttocks are close to each other, but also at the portion where the human body X is close by seating such as a backrest portion or a body side portion. Further, when the detection is performed without contact with the human body X, there is no problem even if an insulating material or a conductive material in an electrically floating state is interposed between the detection electrode 1 and the detection object X. Further, it is preferable that the detection electrode is capable of detecting a wide area in the vicinity of the human body X. In this case, a plurality of detection electrodes 1 may be arranged in the vicinity of the human body X as shown in FIG. 3, and the respective detection electrodes 1 may be connected by lead wires 5. Even in this case, there is no need to change the configuration of the detection circuit 2 ' .
【００１５】本実施例の着座センサとしては図１に示す
差動遅延型の静電容量式着座センサを用いており、この
着座センサは検出電極１のほかに、比較電極３を設け、
夫々の電極１、３との大地との間の静電容量の差分から
着座状態を検知するものである。ここで、この静電容量
式着座センサの場合、検出電極１は人体Ｘの近接する部
分に設け、比較電極は人体Ｘが近接しない部分に設け
る。 A seating sensor of this embodiment is shown in FIG.
A differential delay type capacitive seating sensor is used.
The seating sensor is provided with a comparison electrode 3 in addition to the detection electrode 1.
The seating state is detected from the difference in electrostatic capacitance between the electrodes 1 and 3 and the ground. Here, in the case of this capacitance type seating sensor, the detection electrode 1 is provided in a portion where the human body X is close, and the reference electrode is provided in a portion where the human body X is not close.
【００１６】この差動遅延型の静電容量式着座センサの
検出回路２’は、パルス信号を発生するパルス発生回路
２１と、このパルス発生回路２１の出力を検出電極１及
び比較電極３とアースとの間の静電容量に応じて夫々遅
延した出力を発生する可変遅延回路２２1 ，２２2 と、
夫々の可変遅延回路２２1 ，２２2 の出力を波形整形す
る波形整形回路２３1 ，２３2 と、夫々の波形整形出力
を任意の量だけ遅延させて出力のオフセット調整を行う
遅延調整回路２４1 ，２４2 と、夫々の遅延調節回路２
４の出力の位相差を弁別する位相弁別回路２５とで構成
してある。A detection circuit 2'of the capacitance type seating sensor of the differential delay type has a pulse generation circuit 21 for generating a pulse signal, and an output of the pulse generation circuit 21 is connected to the detection electrode 1 and the comparison electrode 3 and the ground. Variable delay circuits 22 1 and 22 2 that generate outputs delayed according to the electrostatic capacitance between
Waveform shaping circuits 23 1 and 23 2 that shape the outputs of the variable delay circuits 22 1 and 22 2 and a delay adjustment circuit 24 1 that delays the respective waveform shaping outputs by an arbitrary amount to adjust the output offset. , 24 2 and respective delay adjustment circuits 2
4 and a phase discriminating circuit 25 for discriminating the phase difference between the outputs of the No. 4 and No. 4 outputs.
【００１７】この着座センサでは、便器が使用されてい
ないときには、検出電極１及び比較電極３の夫々と大地
との間の静電容量によっては位相差が生じないようにし
てある。いま、用便のために、人が便座３０に座ると、
人体Ｘが検出電極１と大地との間に介在するために、検
出電極１と大地との間の静電容量が変化する。一方、比
較電極３と大地との間の静電容量は人体Ｘが便座に座っ
たときにもさほどに変化しない。このため、可変遅延回
路２２1 , ２２2 の出力の遅延料が大きく変化し、位相
弁別回路２５で位相差が検出され、この出力から温水洗
浄便座Ａのマイクロコンピュータなどからなる制御回路
で人が着座したと判別される。つまり、この差動遅延型
の静電容量式着座センサＳでは、検出電極１側と比較電
極３側の夫々の容量結合の相対的な差から着座検出を行
うのである。In this seating sensor, when the toilet bowl is not used, no phase difference is caused by the capacitance between each of the detection electrode 1 and the comparison electrode 3 and the ground. Now, when a person sits on the toilet seat 30 for a toilet,
For human X is interposed between the detection electrode 1 and the ground, the electrostatic capacitance between the detection electrode 1 and the ground is changed. On the other hand, the capacitance between the reference electrode 3 and the ground does not change so much when the human body X sits on the toilet seat. Therefore, the delay charges of the outputs of the variable delay circuits 22 1 and 22 2 are largely changed, and the phase difference is detected by the phase discriminating circuit 25. From this output, the control circuit including the microcomputer of the warm water washing toilet seat A can It is determined that you are seated. That is, in this differential delay type capacitive seating sensor S, seating is detected from the relative difference in capacitive coupling between the detection electrode 1 side and the comparison electrode 3 side.
【００１８】ここで、上記比較電極３は検出電極１と同
一の環境となる部分に配置する。このようにすれば、こ
の差動遅延型の静電容量式着座センサＳでは、検出電極
１側と比較電極３側との夫々の容量結合の相対的な差を
求めるので、温度等による影響が相殺され、検出出力の
ばらつきが少なくなる。さらに、上記静電容量式着座セ
ンサでは検出方向以外の望まれない方向からの静電容量
変化を検知して誤動作を起こす可能性がある。そこで、
人体Ｘ検出を行う以外の方向の静電容量変化を起こさせ
ないようにするために、必要でない方向での静電容量結
合を遮断するようにすればよい。Here, the reference electrode 3 is arranged in a portion having the same environment as the detection electrode 1. In this way, in this differential delay type electrostatic capacitance type seating sensor S, the relative difference in capacitive coupling between the detection electrode 1 side and the comparison electrode 3 side is obtained, so that the influence of temperature or the like is exerted. This offsets each other, reducing the variation in the detection output. Furthermore, the capacitance type seating sensor may detect a capacitance change from an undesired direction other than the detection direction to cause a malfunction. Therefore,
In order to prevent the capacitance change in the direction other than the detection of the human body X, the capacitance coupling in the unnecessary direction may be cut off.
【００１９】その場合には検出電極１と必要でない検出
方向との間にシールドを施せばよい。例えば、便座３０
の便器や水滴を検出しない構造とするため、図５（ａ）
に示すように検出電極１の下に接地したシールド電極４
を配置する。このようにすれば、便座３０の下方の不要
な静電容量結合を遮断して、必要な方向だけで着座検出
が行える。さらに、図５（ｂ）に示すようにシールド電
極４で上方を除くすべての方向をシールドする構造とす
ればさらに好ましい。In that case, a shield may be provided between the detection electrode 1 and an unnecessary detection direction. For example, toilet seat 30
To the toilet or water droplets that do not detect the structure, FIGS. 5 (a)
Shield electrode 4 grounded below detection electrode 1 as shown in
To place. By doing so, unnecessary capacitive coupling below the toilet seat 30 is blocked, and seating can be detected only in the required direction. Further, more preferred if the structure for shielding all directions except upwards shield electrode 4 as shown in Figure 5 (b).
【００２０】[0020]
【発明の効果】本発明は、上述のように人が座る着座部
の人体が近接する部分に取り付けられる検出電極と、上
記着座部の人体が近接しない部分であり且つ検出電極と
同一環境下に取り付けられる比較電極と、夫々の電極と
大地との間の静電容量の差分の変化から人体の着座状態
を検出する検出回路とを備えているので、検出電極と大
地との間に人が介在することにより静電容量が変化する
部分であれば人体と検出電極との接触及び非接触状態で
あるとを問わずに、いかなる場所にも検出電極を取り付
けることができ、このため取付位置の制約が少ないもの
であって、しかも検出電極及び比較電極と大地との静電
容量の相対的な差分をとることにより環境変化などの同
一要素を相殺する事ができ、環境変化に応じて着座状態
の検出感度が変化することを防止できるという効果があ
る。 As described above, the present invention provides a seating portion on which a person sits.
The detection electrode that is attached to the part where
It is a part where the human body of the sitting part does not come close to
A reference electrode that can be installed under the same environment and each electrode
The sitting state of the human body from the change in the difference in capacitance with the ground
Since it is provided with a detection circuit for detecting, the human body and the detection electrode are in contact and non-contact states in a portion where the capacitance changes due to the presence of a person between the detection electrode and the ground. regardless of, it can also be attached to the detection electrode anywhere, Therefore those constraints mounting position is small
And the static electricity between the detection electrode and the reference electrode and the ground.
By taking the relative difference in capacity, it is possible to
One element can be offset, and seated according to environmental changes
The effect of preventing changes in the detection sensitivity of
It
【００２１】[0021]
【００２２】さらに、人体が近接する方向以外の方向の
静電容量結合を遮断するシールド電極を設けると、必要
でない方向での静電容量結合を遮断して、必要な方向だ
けで着座状態を検出することができる。Further, by providing a shield electrode for blocking the capacitive coupling in a direction other than the direction in which the human body approaches, the capacitive coupling in the unnecessary direction is blocked and the seated state is detected only in the required direction. can do.
【図１】本発明の一実施例の着座センサの回路図であ
る。FIG. 1 is a circuit diagram of a seating sensor according to an embodiment of the present invention.
【図２】同上の検出電極の配設方法の説明図である。FIG. 2 is an explanatory diagram of a method of arranging the above detection electrodes.
【図３】広範囲で人体が検出できるようにする場合の検
出電極の配設方法の説明図である。FIG. 3 is an explanatory diagram of a method of arranging detection electrodes when a human body can be detected in a wide range.
【図４】同上が適用される温水洗浄便座を示す斜視図で
ある。FIG. 4 is a perspective view showing a warm water washing toilet seat to which the above is applied.
【図５】（ａ），（ｂ）は不必要な方向での静電容量結
合を防止する方法の説明図である。5 (a) and 5 (b) are explanatory views of a method for preventing capacitive coupling in an unnecessary direction.
１ 検出電極２ ’ 検出回路 ３ 比較電極 ４ シールド電極 ３０ 便座 Ｘ 人体First detection electrodes 2 'detecting circuit 3 compares electrode 4 the shield electrode 30 seat X human body
Claims (2)
り付けられる検出電極と、上記着座部の人体が近接しな
い部分であり且つ検出電極と同一環境下に取り付けられ
る比較電極と、夫々の電極と大地との間の静電容量の差
分の変化から人体の着座状態を検出する検出回路とを備
えて成ることを特徴とする着座センサ。1. A seating portion on which a person sits is attached to a portion close to a human body.
The sensing electrode attached to the
It is a large part and is installed in the same environment as the detection electrode.
The reference electrode and the difference in capacitance between each electrode and ground.
A seating sensor comprising a detection circuit for detecting a seated state of a human body based on a change in minutes .
結合を遮断するシールド電極を備えて成ることを特徴と
する請求項１記載の着座センサ。2. A capacitance in a direction other than a direction in which a human body approaches
The seating sensor according to claim 1 , further comprising a shield electrode for cutting off the coupling .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP870592A JPH0760185B2 (en) | 1992-01-21 | 1992-01-21 | Seating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP870592A JPH0760185B2 (en) | 1992-01-21 | 1992-01-21 | Seating sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05196743A JPH05196743A (en) | 1993-08-06 |
| JPH0760185B2 true JPH0760185B2 (en) | 1995-06-28 |
Family
ID=11700356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP870592A Expired - Fee Related JPH0760185B2 (en) | 1992-01-21 | 1992-01-21 | Seating sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760185B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2004059343A1 (en) * | 2002-12-25 | 2006-04-27 | 株式会社エーシーティー・エルエスアイ | Capacitance detection proximity sensor |
| WO2019027124A1 (en) * | 2017-08-01 | 2019-02-07 | 송청담 | High sensitivity electrostatic sensor circuit |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6329914B1 (en) * | 1999-10-05 | 2001-12-11 | Nec Technologies, Inc. | Thickness measurement system and method for vehicle occupant detection |
| JP5166547B2 (en) * | 2007-12-13 | 2013-03-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Capacitive type proximity sensor |
| JP5055172B2 (en) * | 2008-03-13 | 2012-10-24 | 慶一 野々垣 | Capacitive proximity sensor |
| JP2010181369A (en) * | 2009-02-09 | 2010-08-19 | Panasonic Corp | Human body detection sensor |
| WO2011024306A1 (en) * | 2009-08-31 | 2011-03-03 | Nonogaki Keiichi | Electrostatic capacity type proximity sensor |
-
1992
- 1992-01-21 JP JP870592A patent/JPH0760185B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2004059343A1 (en) * | 2002-12-25 | 2006-04-27 | 株式会社エーシーティー・エルエスアイ | Capacitance detection proximity sensor |
| WO2019027124A1 (en) * | 2017-08-01 | 2019-02-07 | 송청담 | High sensitivity electrostatic sensor circuit |
| US11271564B2 (en) | 2017-08-01 | 2022-03-08 | Chung Dam Song | High-sensitivity capacitive sensor circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05196743A (en) | 1993-08-06 |
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