JPH01102332A - Contact sensor - Google Patents

Contact sensor

Info

Publication number
JPH01102332A
JPH01102332A JP25960987A JP25960987A JPH01102332A JP H01102332 A JPH01102332 A JP H01102332A JP 25960987 A JP25960987 A JP 25960987A JP 25960987 A JP25960987 A JP 25960987A JP H01102332 A JPH01102332 A JP H01102332A
Authority
JP
Japan
Prior art keywords
voltage
point
electrode
pressing
sample
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
JP25960987A
Other languages
Japanese (ja)
Inventor
Yoshio Iizuka
良雄 飯塚
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.)
Kokoku Rubber Industry Co Ltd
Original Assignee
Kokoku Rubber Industry 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 Kokoku Rubber Industry Co Ltd filed Critical Kokoku Rubber Industry Co Ltd
Priority to JP25960987A priority Critical patent/JPH01102332A/en
Publication of JPH01102332A publication Critical patent/JPH01102332A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable the detection of a pressing force applied to a press point, by providing a group of diodes, a pressure-sensitive conductive rubber, a scan circuit, etc. CONSTITUTION:When a pressing force is applied to a pressure-sensitive conductive rubber 4, a resistance value between a press point whereto the pressing force is applied and a sample pint just below the pressing point changes. In this state, a transistor 10 is put in continuity and a voltage of H is impressed on Y electrodes Y1-Y3. When a voltage of L is impressed on an X electrode X1 by a scan circuit 8 through an inverter I, diodes D11 and D13 are put in continuity, and an analog voltage V11 obtained by adding up a forward voltage of the diode D11 and a voltage drop VD11 between the pressing point of the rubber 4 and the sample point just below this point appears in the Y electrode Y1, while an analog voltage V13 obtained by adding up a forward voltage of the diode D13 and a voltage drop VD13 between the pressing point of the rubber 4 and the sample point just below this point appears in the Y electrode Y2. Then, the voltage V11, the voltage of H and the voltage V13 are subjected to A/D conversion 11, and a multi-value image on a first line is outputted 12 as an image.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、接触センサに関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a contact sensor.

〔従来の技術〕[Conventional technology]

第3図および第4図は従来の接触センサの要部を示す。 3 and 4 show the main parts of a conventional contact sensor.

図において、101はカーボン混入形感圧導電性ゴム(
以下、感圧導電性ゴムという)で、厚さが0.5mmの
シート状をしており、格子点(i、j)における垂直方
向コンダクタンスgrjは、格子点(i、j)に作用す
る力をPIJとすると、g rj= f (P +a)
の関係を有する。
In the figure, 101 is carbon-containing pressure-sensitive conductive rubber (
It is made of pressure-sensitive conductive rubber (hereinafter referred to as pressure-sensitive conductive rubber) and has a sheet shape with a thickness of 0.5 mm, and the vertical conductance grj at the lattice point (i, j) is the force acting on the lattice point (i, j). When is PIJ, g rj= f (P + a)
have the following relationship.

102はF P C(flexible printe
d circuit)で、ストライブ状の上側電極U。
102 is FPC (flexible print)
d circuit) and a striped upper electrode U.

NU、、(電極幅1mm、電極ピッチ2mm)を有し、
前記感圧導電性ゴム101の上側に設けたものである。
NU, (electrode width 1 mm, electrode pitch 2 mm),
It is provided above the pressure-sensitive conductive rubber 101.

103はFPCで、ストライブ状の下側型Mi L+〜
L、(電極幅jam、電極ピッチ2mm)を有し、前記
感圧導電性ゴム101の下側に設けたものである。R1
へRnはコンダクタンスがgoの抵抗で、それぞれO番
目の上側電極U0と下側電極し1〜L、との間に設けて
あり、そのコンダクタンスg0とあるしきい値加重P。
103 is FPC, striped lower type Mi L+~
L, (electrode width jam, electrode pitch 2 mm), and is provided below the pressure-sensitive conductive rubber 101. R1
Rn is a resistor with conductance go, which is provided between the O-th upper electrode U0 and lower electrodes 1 to L, respectively, and has a conductance g0 and a certain threshold weight P.

の間にgo=r(po)の関係を有するものである。1
04はアナログスイッチで、前記上側電極に印加する電
圧を+5vとOvとに切り換えるものである。
There is a relationship of go=r(po) between them. 1
04 is an analog switch that switches the voltage applied to the upper electrode between +5V and Ov.

SH,〜SHoはサンプルホールド回路で、0番目の上
側電極に+5vを印加したときの、下側電極の電圧をサ
ンプルホールドするものである。
SH, ~SHo are sample and hold circuits that sample and hold the voltage of the lower electrode when +5V is applied to the 0th upper electrode.

C1〜Cnはコンパレータで、サンプルホールドされた
電圧と、0番目以外の上側電極に+5■が印加されたと
きの下側電極の電圧とを比較するものである。105は
レジスタで、コンパレータC!〜Coでの比較結果を一
時的に記憶するものである。106はマイクロプロセッ
サで、前記アナログスイッチを0N10FF制御すると
ともに、前記レジスタ105からデータを取り込んでビ
ットパターンを得るものである。
C1 to Cn are comparators that compare the sampled and held voltage with the voltage of the lower electrode when +5■ is applied to the upper electrode other than the 0th electrode. 105 is a register, comparator C! ~Co is used to temporarily store the comparison results. A microprocessor 106 controls the analog switch 0N10FF and takes in data from the register 105 to obtain a bit pattern.

次に、第4図に基づき動作を説明する。Next, the operation will be explained based on FIG.

アナログスイッチ104により、上側電極UoNUmの
うち、例えば、上側電極U、に電圧Vを、ソノ他の上側
電極Uo 〜U t−+ s U III 〜U、aに
電圧0を印加する。例えば、上側電極Uo、Utに電圧
Vを印加すると、j番目の下側電極Ljの出力電圧vj
0、vj”は、次式(1)、(2)で表される。
The analog switch 104 applies a voltage V to, for example, the upper electrode U of the upper electrodes UoNUm, and applies a voltage 0 to the other upper electrodes Uo~Ut-+sUIII~U,a. For example, when a voltage V is applied to the upper electrodes Uo and Ut, the output voltage vj of the j-th lower electrode Lj
0, vj'' are expressed by the following equations (1) and (2).

Vj0=go V/ (go+ΣgkJ)vjI−gl
Jv/(g0+Σgkj)コンダクタンスgrjは下側
電極に並列に接続されるコンダクタンスの和が求まらな
い限り知ることができないが、電圧■JOはコンダクタ
ンスg0に、電圧v、iはコンダクタンスg ijに比
例するから、コンダクタンスgIjとコンダクタンスg
0の大小は、出力電圧vj′と、サンプルホールド回路
SHJによりサンプルホールドされた出力電圧vj0と
をコンパレータCjにより比較することにより知ること
ができる。また、コンダクタンスg、Jは加重PiJの
増加関数であるから、v、’>vJOテあれば、Plj
>Poである。
Vj0=go V/ (go+ΣgkJ)vjI-gl
Jv/(g0+Σgkj) The conductance grj cannot be known unless the sum of the conductances connected in parallel to the lower electrode is found, but the voltage JO is proportional to the conductance g0, and the voltages v and i are proportional to the conductance gij Therefore, conductance gIj and conductance g
The magnitude of 0 can be determined by comparing the output voltage vj' and the output voltage vj0 sampled and held by the sample-and-hold circuit SHJ using a comparator Cj. Also, since the conductances g and J are increasing functions of the weighted PiJ, if v,'>vJOte, then Plj
>Po.

データとしては、 Qi = (q、、、912、・・・・−1q In)
ただし、 の形のビットパターンとして得られる。
As data, Qi = (q,,,912,...-1q In)
However, it is obtained as a bit pattern of the form.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の接触センサは、感圧導電性ゴム面内の特性が均一
であっても、得られるアナログ電圧が絶対値でないから
、押圧点に加えられた押圧力を検出することができない
という問題点があった。
Conventional contact sensors have the problem that even if the characteristics within the surface of the pressure-sensitive conductive rubber are uniform, the obtained analog voltage is not an absolute value, so the pressing force applied to the pressing point cannot be detected. there were.

この発明は、上記のような問題点を解決するためになさ
れたもので、押圧点に加えられた押圧力を検出できる接
触センサを得ることを目的とする。
This invention was made in order to solve the above-mentioned problems, and an object of the present invention is to obtain a contact sensor that can detect a pressing force applied to a pressing point.

〔間層点を解決するための手段〕[Means for solving interlayer points]

この発明に係る接触センサは、押圧点のその直下の標本
点に対する変位を検出する変位検出手段と、標本点と走
査点の間を、変位が検出された場合は導通させ、変位が
検出されない場合は遮断し、前記押圧点からアナログ電
圧を出力する走査手段とを設けたものである。
The contact sensor according to the present invention includes a displacement detecting means for detecting displacement of a pressing point with respect to a sample point immediately below it, and conduction between the sample point and the scanning point when displacement is detected, and when no displacement is detected. and scanning means for outputting an analog voltage from the pressing point.

〔作用〕[Effect]

この発明における接触センサは、走査点と標本点の間を
、押圧点のその直下の標本点に対する変位が検出された
場合、導通させ、変位が検出されない場合、遮断し、前
記押圧点からアナログ電圧を出力する。
The contact sensor according to the present invention makes conduction between the scanning point and the sample point when a displacement of the pressing point with respect to the sampling point immediately below it is detected, and disconnects it when no displacement is detected, and applies an analog voltage from the pressing point to the sampling point. Output.

〔実施例〕〔Example〕

第1図および第2図はこの発明の一実施例を示す。図に
おいて、1は基板で、その表面に標本点を格子状に設け
である。2は電極で、基板1の裏側にX電極Xi〜x2
をストライプ状にプリントしたものである。3はダイオ
ード群で、ダイオードD11〜D13、D21〜D23
により構成され、ダイオードDll〜D13は前記基板
1の標本点(1,1)、(1,2)、(1,3)に、ダ
イオードD21〜D23は標本点(2,1)、(2,2
)、(2,3)に、基板1の主面に対して垂直に貫通さ
せ、各ダイオードのアノードは基板1の表面かられずか
に突出させ、カソードは前記電極2にはんだ付けしであ
る。4は感圧導電性ゴム(変位検出手段)で、前記基板
1の表面を覆うように設けてあり、押圧点のダイオード
D11〜D13、D21〜D23のアノード先端、すな
わち標本点に対する変位を検出するものである。押圧点
と標本点との間の抵抗値は、押圧力に比例して小さくな
る。5は電極で、前記感圧導電性ゴム4の表面に、前記
電極2と交差させてY電極Y1〜Y3をストライプ状に
設けたものである。6は電極2.5を防護する絶縁性の
カバーである。7は走査手段で、前記ダイオード群3と
スキャン回路8により構成され、インバータIを介して
、前記ダイオードDIl〜D13、ダイオードD21〜
D23のカソード(走査点)にローレベル(L)の電圧
を、順次、印加し、走査点とその標本点の間を、変位が
検出された場合は導通させ、押圧力が検出されない場合
は遮断するものである。9は分圧回路で、抵抗r、Rで
構成され、トランジスタ10を介して得られる電源電圧
を分圧してハイレベル()I)の電圧を得るものである
。11はA/D変換器で、Hの電圧を濃度値最高にとり
、Lの電圧を濃度値最低にとり、走査ごとに前記Y電極
Y1〜Y3に現れるアナログ電圧を多値化するものであ
る。12は画像出力装置で、前記A/D変換器11から
得られる多値データに基づき多値画像を表示するもので
ある。
1 and 2 show an embodiment of the invention. In the figure, reference numeral 1 denotes a substrate, on the surface of which sample points are provided in a grid pattern. 2 is an electrode, with X electrodes Xi to x2 on the back side of the substrate 1.
is printed in stripes. 3 is a diode group, diodes D11-D13, D21-D23
The diodes Dll-D13 are located at the sample points (1,1), (1,2), (1,3) of the substrate 1, and the diodes D21-D23 are located at the sample points (2,1), (2, 2
), (2, 3) are passed through perpendicularly to the main surface of the substrate 1, the anode of each diode slightly protrudes from the surface of the substrate 1, and the cathode is soldered to the electrode 2. Reference numeral 4 denotes pressure-sensitive conductive rubber (displacement detection means), which is provided to cover the surface of the substrate 1, and detects displacement with respect to the anode tips of the diodes D11 to D13 and D21 to D23 at the pressing point, that is, the sample point. It is something. The resistance value between the pressing point and the sample point decreases in proportion to the pressing force. Reference numeral 5 denotes electrodes, and Y electrodes Y1 to Y3 are provided in stripes on the surface of the pressure-sensitive conductive rubber 4, intersecting with the electrodes 2. 6 is an insulating cover that protects the electrode 2.5. Reference numeral 7 denotes a scanning means, which is composed of the diode group 3 and the scan circuit 8, and is connected to the diodes DIl to D13 and the diodes D21 to D21 through the inverter I.
A low level (L) voltage is sequentially applied to the cathode (scanning point) of D23, and conduction is established between the scanning point and its sample point when displacement is detected, and shut off when no pressing force is detected. It is something to do. Reference numeral 9 denotes a voltage dividing circuit, which is composed of resistors r and R, and divides the power supply voltage obtained through the transistor 10 to obtain a high level ()I) voltage. Reference numeral 11 denotes an A/D converter, which sets the H voltage to the highest density value and the L voltage to the lowest density value, and multi-values the analog voltage appearing on the Y electrodes Y1 to Y3 for each scan. Reference numeral 12 denotes an image output device that displays a multivalued image based on the multivalued data obtained from the A/D converter 11.

次に、動作を説明する。Next, the operation will be explained.

感圧導電性ゴム4に押圧力が加わると、押圧力が加わっ
た押圧点とその直下の標本点、例えば、標本点(1,1
)、(1,3)、(2,1)、(2,2)、(2,3)
との間の抵抗値が変化する。
When a pressing force is applied to the pressure-sensitive conductive rubber 4, the pressing point where the pressing force was applied and the sample point immediately below it, for example, the sample point (1, 1
), (1,3), (2,1), (2,2), (2,3)
The resistance value between the

この状態で、トランジスタ10を導通させ、Y電8iY
l〜Y3にHの電圧を印加する。
In this state, the transistor 10 is made conductive and the Y current 8iY
A voltage of H is applied to l to Y3.

まず、スキャン回路8により、インバータIを介してX
電極x1にLの電圧が印加されると、ダイオードDll
、D13が導通し、Y電極Y1には、ダイオードDll
の順方向電圧と、感圧導電性ゴム4の押圧点とその直下
の標本点(1,1)との間の電圧降下分VDIIとを合
計したアナログ電圧Vllが、Y電極Y2には、ダイオ
ードD13の順方向電圧と、感圧導電性ゴム4の押圧点
とその直下の標本点(1,3)との間の電圧降下分VD
13とを合計したアナログ電圧V13が現れる。そして
、Y’F!FiY1に現れた電圧Vll、Y電極Y2に
現われたHの電圧、Y電極Y13に現れた7ナログ電圧
V13は、それぞれ、A/D変換器11によりディジタ
ル値に変換され、得られた多値データに基づき1ライン
目の多値画像が画像出力装置12に表示される。
First, the scan circuit 8 sends X through the inverter I.
When a voltage of L is applied to the electrode x1, the diode Dll
, D13 are conductive, and the Y electrode Y1 has a diode Dll.
The Y electrode Y2 has a diode The forward voltage of D13 and the voltage drop VD between the pressing point of the pressure-sensitive conductive rubber 4 and the sample point (1, 3) directly below it
An analog voltage V13, which is the sum of 13 and 13, appears. And Y'F! The voltage Vll appearing on FiY1, the H voltage appearing on the Y electrode Y2, and the 7 analog voltage V13 appearing on the Y electrode Y13 are each converted into digital values by the A/D converter 11, and the obtained multi-value data Based on this, the first line multi-valued image is displayed on the image output device 12.

ついで、スキャン回路8によりインバータIを介してX
電極x2にLの電圧が印加されると、ダイオードD21
、D22、D23が導通する。その結果、Y電極Y1に
は、ダイオード021の順方向電圧と、感圧導電性ゴム
4の押圧点とその直下の標本点(2,1)との間の電圧
降下分VD21とを合計したアナログ電圧V21が現わ
れる。また、Y電極Y2には、ダイオードD22の順方
向電圧と、感圧導電性ゴム4の押圧点とその直下の標本
点(2,2)との間の電圧降下分VD22とを合計した
アナログ電圧V22が現われる。さらに、Y電極Y3に
は、ダイオードD23の順方向電圧と、感圧導電性ゴム
4の押圧点とその直下の標本点(2,3)との間の電圧
降下分VD23とを合計したアナログ電圧V23が現わ
れる。
Then, the scan circuit 8 sends
When a voltage of L is applied to the electrode x2, the diode D21
, D22, and D23 are electrically connected. As a result, the Y electrode Y1 has an analog voltage that is the sum of the forward voltage of the diode 021 and the voltage drop VD21 between the pressing point of the pressure-sensitive conductive rubber 4 and the sample point (2, 1) immediately below it. Voltage V21 appears. Further, an analog voltage is applied to the Y electrode Y2, which is the sum of the forward voltage of the diode D22 and the voltage drop VD22 between the pressing point of the pressure-sensitive conductive rubber 4 and the sample point (2, 2) directly below it. V22 appears. Further, an analog voltage is applied to the Y electrode Y3, which is the sum of the forward voltage of the diode D23 and the voltage drop VD23 between the pressing point of the pressure-sensitive conductive rubber 4 and the sample point (2, 3) directly below it. V23 appears.

そして、Y電極Y1に現れたアナログ電圧V21、Y電
極Y2に現われたアナログ電圧V22、Y電極Y13に
現れたアナログ電圧V23は、それぞれ、A/D変換器
11によりディジタル値に変換され、得られた多値デー
タに基づき2ライン目の多値画像が画像出力装置12に
表示される。 なお、この実施例では、説明を簡単にす
るため、6個の標本点を有する場合を例に説明したが、
標本点の数は制限がない。
Then, the analog voltage V21 appearing at the Y electrode Y1, the analog voltage V22 appearing at the Y electrode Y2, and the analog voltage V23 appearing at the Y electrode Y13 are respectively converted into digital values by the A/D converter 11 and obtained. A second line multi-value image is displayed on the image output device 12 based on the multi-value data. In addition, in this example, in order to simplify the explanation, the case where there are six sample points was explained as an example.
There is no limit to the number of sample points.

また、標本点の密度を高くするほど、画像出力装置11
により得られる画像の鯖細度が増加する。
Moreover, the higher the density of sample points, the more the image output device 11
This increases the fineness of the image obtained.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明によれば、走査点と標本
点の間を、押圧点のその直下の標本点に対する変位が検
出された場合、導通させ、変位が検出されない場合、遮
断し、前記押圧点からアナログ電圧を出力する構成にし
たので、押圧力を検出できる接触センサを得ることがで
きるという効果がある。
As explained above, according to the present invention, conduction is established between a scanning point and a sample point when a displacement of a pressing point with respect to a sample point immediately below it is detected, and is interrupted when no displacement is detected. Since the configuration is such that an analog voltage is output from the pressing point, it is possible to obtain a contact sensor that can detect pressing force.

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

第1図および第2図はこの発明の一実施例を示す図で、
第1図は要部回路図、第2図は断面図である。第3図は
従来の接触センサを示すブロック図、第4図は動作説明
図である。 図において、3はダイオード群、4は感圧導電性ゴム、
Y1〜Y3はY電極、8はスキャン回路である。
FIG. 1 and FIG. 2 are diagrams showing one embodiment of this invention,
FIG. 1 is a circuit diagram of the main part, and FIG. 2 is a sectional view. FIG. 3 is a block diagram showing a conventional contact sensor, and FIG. 4 is an operation explanatory diagram. In the figure, 3 is a diode group, 4 is a pressure-sensitive conductive rubber,
Y1 to Y3 are Y electrodes, and 8 is a scan circuit.

Claims (1)

【特許請求の範囲】[Claims] 押圧点のその直下の標本点に対する変位を検出する変位
検出手段と、標本点と走査点の間を、変位が検出された
場合は導通させ、変位が検出されない場合は遮断し、前
記押圧点からアナログ電圧を出力する走査手段とを備え
たことを特徴とする接触センサ。
Displacement detecting means for detecting displacement of a pressing point with respect to a sample point directly below the pressing point, and conduction between the sampling point and the scanning point when displacement is detected, and disconnected when displacement is not detected; A contact sensor characterized by comprising: scanning means for outputting an analog voltage.
JP25960987A 1987-10-16 1987-10-16 Contact sensor Pending JPH01102332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25960987A JPH01102332A (en) 1987-10-16 1987-10-16 Contact sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25960987A JPH01102332A (en) 1987-10-16 1987-10-16 Contact sensor

Publications (1)

Publication Number Publication Date
JPH01102332A true JPH01102332A (en) 1989-04-20

Family

ID=17336464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25960987A Pending JPH01102332A (en) 1987-10-16 1987-10-16 Contact sensor

Country Status (1)

Country Link
JP (1) JPH01102332A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100331A (en) * 1980-12-15 1982-06-22 Agency Of Ind Science & Technol Measuring device for load distribution
JPS5879126A (en) * 1981-11-05 1983-05-12 Nissan Motor Co Ltd Pressure sensitive sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100331A (en) * 1980-12-15 1982-06-22 Agency Of Ind Science & Technol Measuring device for load distribution
JPS5879126A (en) * 1981-11-05 1983-05-12 Nissan Motor Co Ltd Pressure sensitive sensor

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