JPS6035605B2 - How to detect contact data using a contact sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting contact part data, that is, contact area and coordinates of its center position when an object is in contact with a contact sensor.

For example, it can be measured by using a contact sensor that can detect the presence or absence of contact at multiple points in a matrix and by performing necessary calculations. However, measurement using such a method requires very complicated and expensive equipment.

The present invention solves these problems and provides a method that makes it possible to easily detect the contact area and the coordinates of its center position using an extremely simple device. To describe the method of the present invention in detail with reference to the drawings, in FIG. A sheet resistor 2, a second layer pressure sensitive plate 3 made of pressure sensitive conductive rubber or the like whose conductance changes on and off under the action of external pressure, and the first layer sheet resistor 2. It is formed into a three-layer structure with a third layer of sheet resistor 4 made of the same material, and these basically have a square planar shape, and the periphery is surrounded by two pairs of opposing resistors. The planar resistor 2 in the first layer is provided with electrodes 5 and 6 on a pair of opposite sides in the x direction, and the planar resistor 4 in the third layer is provided with electrodes 5 and 6 on opposite sides in the x direction.
Electrodes 7 and 8 are provided on a pair of opposite sides in the direction.

In the contact sensor 1 having such a configuration, a voltage of 10a is applied to the electrodes 5 and 6 at both ends of the sheet resistor 2 in the first layer through the resistors R, and the sheet resistor 2 in the third layer The electrodes 7 and 8 at both ends of the sensor 4 are connected to each other through a resistor R so as to apply a voltage -a, and when the object to be measured 10 comes into contact with the contact sensor 1, a contact pressure higher than a certain resistance value acts on the sensor. At this time, the voltages VA, V8 of the electrodes 5, 6 and the voltages Vc, Vo of the electrodes 7, 8, which have changed in accordance with the sudden change in conductance, are taken out.

FIG. 2 shows a circuit configuration for determining the area S of the contact surface D* of the object to be measured 10 with respect to the contact sensor 1 and the coordinate x of the coordinates x and y of the center position P based on the voltage of each electrode. show.

Then, the voltages VA and VB of the electrodes 5 and 6 are subtracted by a subtraction circuit 11,
12 and 13, and the respective voltages +a applied to the electrodes 5 and 6 via the resistor R are subtracted by subtraction circuits 11 and 13.
, and the outputs from the subtraction circuits 11 and 13 based on these are led to the addition circuit 14, so that the contact surface D* of the object to be measured 10 is taken as the output from the addition circuit 14, and S=k.

(Ne-V^-VB) (However, ko is a constant) It can be found by

Further, x at the center position P(x, y) of the contact surface D* can be determined by inputting the outputs from the subtraction circuits 12 and 14 to the division circuit 15, and the output from the division circuit 15 is expressed as =k can be found by ≧＾show≧BVB (where k is a constant).

Furthermore, the area S of the contact surface D* is the voltage V of the electrodes 7 and 8.
It can also be determined based on the voltages Vc and Vo, and the coordinate value y at the center position P(x,y) is determined based on the voltages Vc and Vo.
It is determined based on Vo.

That is, S=k with substantially the same circuit configuration as in FIG. 2 above.
(Genju VC + V.) y: k (Kanpu shut-off D) It is obtained as follows.

The area S of such a contact surface D* and its center position P(x
, y) is detected without applying the contact pressure of the object to the pressure plate 3,
The current density when it is in the off-resistance state is zero, and the current density when it is in the on-resistance state when contact pressure is applied is io.
Then, S='JDi(x,y)shipdy=i.

〇D*肱dy- ′′. u (x, y) j (x, y illusion xd
y×=S−i.

'of. *x broadside dy-i.

′ノD*dxdy▽=′′ is (X, author (X, y illusion y i.

′′D*y broadside dyi.

′′o*dxdy.

As described in detail above, according to the present invention, it is possible to easily detect data on the contact portion of an object with respect to a contact sensor using a simple device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a contact sensor used in the present invention, and FIG. 2 is a configuration diagram of an arithmetic circuit that contacts the contact sensor. 1... Contact sensor, 2, 4... Planar resistor, 3... Pressure sensitive plate, 5, 6, 7, 8...
・Electrode, R...Resistance. Figure 1 Figure 2

Claims (1)

[Claims] 1. A first-layer sheet resistor made of a highly conductive flexible material, a second-layer pressure-sensitive plate whose conductance changes on and off under the action of pressure, and a conductive The periphery of the contact sensor is divided into two opposite sides, and the opposite sides of the first layer of sheet resistors are divided into two opposing sides. Voltages +a and -a are applied via resistors to the electrodes provided on the pair of opposite sides and the electrodes provided on the pair of opposite sides whose values in the third layer sheet resistor are opposite, respectively. Voltages V_A, V_B of the pair of electrodes in the sheet resistor, or voltage V_C, of the pair of electrodes in the second sheet resistor,
Based on V_D, the contact area S of the object with respect to the contact sensor is calculated as S=k_0(2a-V_A-V_B)=k_0(
2a+V_C+V_D) (where k_0 is a constant). 2. A first layer of sheet resistor made of a highly conductive flexible material, a second layer of pressure sensitive plate whose conductance changes on and off under the action of pressure, and a third layer of highly conductive material. A contact sensor configured with a sheet resistor is used, the periphery of the contact sensor is divided into two pairs of opposing sides, and the contact sensor is provided on the pair of opposite sides of the first layer sheet resistor. Voltages +a and -a are applied to the electrodes provided on the opposite sides of the third-layer sheet resistor and the other pair of opposite sides of the third-layer sheet resistor through resistors, and Based on the voltages V_A, V_B of the electrodes and the voltages V_C, V_O of the pair of electrodes on the second sheet resistor, the coordinates x, y of the center position of the contact area S of the object with respect to the contact sensor are determined as x=k(V_A- V_B)/(2a
-V_A-V_B)y=k(-V_C-V_D)/(2
a+V_C+V_D) (where k is a constant) A method for detecting contact part data using a contact sensor.