JP2005233798A - Position pressure detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressed position pressure detector having a simple constitution, and detecting a pressed position pressed in an area to be pressed and the pressure thereof. <P>SOLUTION: This position pressure detector is provided with a base 110 having one surface on which a resistance film 120 is formed, and a base 111 having one surface on which a conductive material 125 is formed. The resistance film 120 and the conductive material 125 are arranged so that the resistance film 120 and the conductive material 125 are opposed to each other, and a spacer 130 is interposed between the base 110 and the base 111. The voltage of the resistance film 120 is linearly increased from the side of one end of the resistance film 120 to the side of the other end by applying voltage to electrode pairs 200, 201 of the both ends of the resistance film 120. An electrode 202 is provided on the conductive material 125. Also provided are a circuit for outputting a position signal based on a signal acquired from the electrode of the conductive material 125, and another circuit for outputting pressure signals based on signals acquired from the electrode pairs 200, 201 of the both ends of the resistance film 120. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure position that is pressed in an area to be pressed, and a position pressure detection device that detects the pressure thereof, which can be used for operating a musical instrument or the like.

  In the music field, many devices using a planar position detection sensor have been proposed in order to provide a musical sound controller with good operability. For example, a planar position detection sensor that outputs a DC voltage corresponding to a pressing point when the position of the pressing point is moved in a one-dimensional direction (X direction) has been proposed (for example, Patent Document 1). reference.).

JP 2000-267663 A (page 3-4, FIG. 4)

  However, according to such a conventional planar position detection sensor, in other words, only a signal corresponding to a one-dimensional pressing point position can be obtained. For this reason, for example, in order to obtain information on the pressed position and the pressure, which are often detected in the operation of the musical instrument, at a time, the pressed position detecting device and the pressed pressure detecting device must be combined. There were various problems such as increase in scale and cost.

  Therefore, the present invention has been made to solve such a conventional problem, and provides a pressing position that is pressed in an area to be pressed with a simple configuration and a pressing position pressure detecting device that detects the pressure. For the purpose.

In order to achieve the above object, the present invention provides a pressure position pressed in an area to be pressed and a position pressure detection device that detects the pressure thereof.
A flexible first base having a resistance film formed on one side and a second base having a conductor formed on one side are disposed so that the resistance film and the conductor face each other. A spacer is provided between the bases,
Power is supplied to the electrode pair at both ends of the resistance film, and the voltage of the resistance film is configured to increase from one end side to the other end side, and an electrode is provided on the conductor.
A position signal output circuit that outputs a position signal based on a signal obtained from the electrode of the conductor;
And a pressure signal output circuit for outputting a pressure signal based on signals obtained from the electrode pairs at both ends of the resistance film.

Further, another aspect of the present invention is a position pressure detection device that detects a pressure position pressed in an area to be pressed and a pressure thereof.
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor group face each other. And a spacer between both bases,
The power supply is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a diode anode is connected to each conductor of the conductor group. And connect each cathode in common,
A position signal output circuit that outputs a position signal based on a signal obtained from the commonly connected cathodes;
And a pressure signal output circuit that outputs a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film. Further, according to the present invention, in the position pressure detection device that detects the pressed position and the pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor group face each other. And a spacer between both bases,
Power is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a cathode of a diode is connected to each conductor of the conductor group And connect each anode in common,
A position signal output circuit that outputs a position signal based on a signal obtained from the commonly connected anodes;
There is also provided a position pressure detection device comprising a pressure signal output circuit that outputs a pressure signal based on signals obtained from electrode pairs at both ends of the resistance film. The signal obtained from the commonly connected cathodes is a voltage indicating the highest potential among the potentials of the conductors connected to the respective anodes. When the diodes are connected in reverse, that is, each cathode is connected to a conductor, the anodes are connected in common, and the signal obtained from the commonly connected anodes is the lowest potential among the potentials of the conductors connected to each cathode. This voltage signal can be used as a position detection signal.

Furthermore, as another aspect of the invention, in the position pressure detection device that detects the pressed position and the pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor face each other. And a spacer between both bases,
The power supply is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a plurality of inputs are periodically input to each conductor of the conductor group. Connect the input of the selection switch (300) to switch to and input,
A position signal output circuit that outputs a position signal based on a signal obtained from the output of the selection switch;
There is also provided a position pressure detection device comprising a pressure signal output circuit that outputs a pressure signal based on signals obtained from electrode pairs at both ends of the resistance film. In an aspect of the present invention, instead of the diode, each of the conductors of the conductor group is connected to an input of a selection switch (300) that periodically switches a plurality of inputs and selects an input, A position signal output circuit that outputs a position signal based on a signal obtained from the output; and a pressure signal output circuit that outputs a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film. It is said.

  According to the present invention, it is possible to achieve an effect that it is possible to realize a pressing position pressure detecting device that detects a pressing position pressed in an area to be pressed and its pressure with a simple configuration.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Constitution)
FIG. 1 is a configuration diagram of the pressing position pressure detecting device 1, and FIG. 2 is a schematic side view of a sensor unit 100 used in the pressing position pressure detecting device 1. As shown in FIG. 2, the sensor unit 100 has a rectangular shape in plan view, and has a rectangular shape in plan view as well as a flexible base 110 in which a resistive film 120 made of carbon or the like is formed on one surface (lower surface). The base 110 and the base 111 are disposed so that the resistance film 120 and the conductor 125 are opposed to each other. Further, for example, an extremely small hemispherical spacer 130 (for example, using a material such as PET) is formed on the conductor 125 in an appropriate pattern, and the resistance film 120 and the conductor 125 do not contact when not pressed. It is configured as follows. In addition, in the vicinity of both ends of the resistance film 120 and the conductor 125, the portion of the resistance film 120 at a corresponding position (shown by reference sign S) is conductive only when pressed (shown by reference sign PS) due to the flexibility of the base 110. While contacting the body 125, intermediate members 140 and 140, which are elastic members for returning the positional relationship between the resistance film 120 and the conductor 125 to the original state when the pressing is stopped, are provided.

  In addition, an electrode 200 and an electrode 201 are formed on both ends of the rectangular resistive film 120 in plan view to form an electrode pair, and a power supply (10 (V) voltage in FIG. 1) is supplied between the electrode 200 and the electrode 201. Thus, the voltage is linearly changed from “0 (V): electrode 200” to “10 (V): electrode 201” in the longitudinal direction of the resistive film 120 (left and right direction in FIG. 2). Has been. Further, an electrode 202 is also formed on the conductor 125.

  Next, returning to FIG. 1, the configuration of the entire apparatus will be described. The electrode 202 is connected so as to negatively feed back its output, and is connected to the non-inverting terminal of the operational amplifier 11 having a buffer function. As will be described later, the output of the operational amplifier 11 becomes a position signal. In addition, an operational amplifier 10 in which its output is negatively fed back by a resistor R4 is also provided. A resistor R1 to which an adjusting resistor R11 and a resistor R12 are connected are connected to an inverting terminal of the operational amplifier 10, and a resistor R3. Connection point with is connected. Further, a connection point between the electrode 200 and one end of the resistor R2 is connected to the non-inverting terminal of the operational amplifier 10, and the other end of the resistor R2 is connected to the gnd voltage, that is, grounded. Note that a voltage of 10 (V) is supplied to one end of the resistor R1 and the electrode 201.

  Thus, assuming that the resistance value of the sensor unit 100 is “Rx”, as shown in FIG. 3, a bridge circuit is configured by the resistor R1, the resistor R2, the resistor R3, and the resistor Rx. The output corresponds to the pressure signal of the press.

(Function)
As shown by reference sign PS in FIG. 2, when the pressing operation of the base 110 is performed, the voltage of the portion of the resistance film 120 at the position (reference sign S) corresponding to the pressing point is transmitted to the conductor 125. That is, a voltage corresponding to the pressed position is output from the electrode 202 and buffered, so that the operational amplifier 11 outputs a position signal corresponding to the pressed position in the longitudinal direction of the base 110 (left and right in FIG. 2). Will be output.

  On the other hand, the area where the resistance film 120 contacts the conductor 125 increases according to the magnitude of the pressing pressure, and as a result, the resistance Rx decreases. Conversely, when the contact area between the two becomes small, the resistance Rx of the sensor unit 100 increases. In response to this change in Rx, a signal is output from the electrode 200, which is amplified and output by the operational amplifier 10 by "(the combined resistance of R1 and R3 + R4) / (the combined resistance of R1 and R3)", thus. A pressure signal having a magnitude corresponding to the pressure of the resistance film 120 is output from the operational amplifier 10. Note that the adjustment resistor R1 can be used to adjust the pressure signal so that the pressure signal is zero when the resistance film 120 is not pressed.

  Therefore, according to the apparatus configuration example of FIG. 1, the base 110 (first base) having the resistance film 120 formed on the lower surface and the base 111 (second base) having the conductor 125 formed on the upper surface are provided. The resistor film 120 and the conductor 125 are disposed so as to face each other, and a spacer 130 is provided between both the bases 110 and 111, and a voltage is supplied to the electrode pair 200 and 201 at both ends of the resistor film 120. Is configured to increase linearly from one end side (left side in FIG. 2) to the other end side (right side in FIG. 2) of the resistive film 120, and an electrode 202 is provided on the conductor 125. A circuit that outputs a position signal based on a signal obtained from an electrode and a circuit that outputs a pressure signal based on a signal obtained from the electrode pair 200, 201 at both ends of the resistance film 120 are provided. By A simple configuration using a single sensor unit 100, it became possible to obtain a signal corresponding to the pressing position and the pressing pressure of the base 110 at the same time.

  FIG. 4 is a configuration diagram of the pressed position pressure detection device 2 having another configuration, and FIG. 5 is a schematic configuration diagram of the sensor unit 101 used for this. In addition, what attached | subjected the code | symbol same as what was mentioned above is the same thing, and it does not repeat description about this.

  5A is a side view of the sensor unit 101, and FIG. 5B is a plan view of the base 111 side when the sensor unit 101 is viewed from the arrow Y1 side in FIG. 5A. As can be seen from comparison with FIG. 2, four conductors 125 a, 125 b, 125 c, and 125 d, which are also rectangular in plan view, are arranged in the longitudinal direction of the base 111 ( (In the horizontal direction of the drawing). Furthermore, the anodes of the diodes D1, D2, D3, and D4 are connected to the respective conductors 125a, 125b, 125c, and 125d, and the cathodes of the diodes D1, D2, D3, and D4 are connected in common. The connection point is connected to a non-inverting terminal of the operational amplifier 11, and this non-inverting terminal is grounded via a resistor R5. The sensor unit 101 is not provided with the electrode 202.

  The signal obtained from the commonly connected cathodes is a voltage indicating the highest potential among the potentials of the conductors connected to the respective anodes. When the diodes are reversely connected, that is, when each cathode is connected to a conductor and the anodes are connected in common, the signal obtained from the commonly connected anode is the lowest of the potentials of the conductors connected to each cathode. Although this is a voltage indicating a potential, this voltage signal can also be used as a position detection signal. The reason why the highest potential or the lowest potential is selected by using the diode is to determine the priority pressing position information when a plurality of positions away from the sensor are simultaneously pressed. If it is a continuous pressing range, there is often no practical problem by setting one position inside the pressing range as the pressing position, but there is a possibility that a plurality of fingers may touch when the operator presses with a finger. . In a position sensor using a resistance film, when a plurality of distant positions are pressed at the same time, position information indicating an intermediate point other than the pressed position is obtained. In order to avoid this, in the present invention, the electrodes are separated and the diode or the switching unit 300 described below is used.

  Among the four conductors 125a, 125b, 125c, and 125d, the diode of the conductor corresponding to the pressed position of the base 110 becomes conductive, and the voltage of the resistance film 120 with respect to the pressed position becomes the operational amplifier 11. Is output from. Thus, a position signal corresponding to the pressed position in the longitudinal direction of the base 110 (the left-right direction in FIG. 5) is output. On the other hand, when the magnitude of the pressing pressure is increased, the area where the resistance film 120 is in contact with any of the conductors 125a, 125b, 125c, and 125d is increased, and as a result, the resistance Rx between the resistance film 120 and the conductor is decreased. Further, when the magnitude of the pressing pressure is reduced, the area where the resistance film 120 is in contact with any of the conductors 125a, 125b, 125c, and 125d is reduced, and as a result, the resistance Rx between the resistance film 120 and the conductor is increased. In response to such a change in Rx, a signal is output from the electrode 200, which is amplified and output by the operational amplifier 10 by “(the combined resistance of R1 and R3 + R4) / (the combined resistance of R1 and R3)”, Thus, a pressure signal having a magnitude corresponding to the pressure of the resistance film 120 is output from the operational amplifier 10. In this device example, the number of conductor groups is four, but this is only an example.

  Therefore, in this pressed position pressure detecting device 2, a base 110 (first base) having a resistance film 120 formed on the lower surface and a base 111 (second base) having a plurality of conductor groups 125a to 125d formed on the upper surface. Base), the resistor film 120 and the conductor groups 125a to 125c are arranged so as to face each other, and a spacer 130 is provided between both the bases 110 and 111, and a voltage is applied to the electrode pair 200 and 201 at both ends of the resistor film 120. And the voltage of the resistance film 120 is linearly increased from one end side to the other end side of the resistance film 120, and the diode D1 is connected to each conductor of the conductor groups 125a, 125b, 125c, and 125d. , D2, D3, and D4 are connected to each other and the cathodes are connected in common. Further, a position signal is obtained based on a signal obtained from the commonly connected cathodes. A simple configuration using one sensor unit 101 by including a circuit for outputting pressure and a circuit for outputting a pressure signal based on signals obtained from the electrode pairs 200 and 201 at both ends of the resistance film 120 Thus, it becomes possible to simultaneously obtain a signal corresponding to the pressing position of the base 110 and the pressing pressure.

  The signal obtained from the commonly connected cathodes is a voltage indicating the highest potential among the potentials of the conductors connected to the respective anodes. The potential applied to the electrode 201 has been described as 10 (V), but if this is a negative voltage (for example, −10 (V)), the diode can be reversely connected to obtain the same effect. That is, each cathode is connected to a conductor and anodes are connected in common, and the signal obtained from the commonly connected anode is a voltage indicating the lowest potential among the conductors connected to each cathode. This voltage signal can be used as a position detection signal, and even when a plurality of separated parts of the sensor are pressed with a plurality of fingers, the position within the pressed range can be detected.

(Other configuration examples)
FIG. 6 is a configuration explanatory diagram of another device configuration example using the sensor unit 101 of FIG. In this device configuration, the electrode 200 is grounded (gnd), and a constant current from the current source 150 is supplied to the electrode 201. As a result, the voltage of the resistance film 120 becomes a maximum value from 0 (V) from the lower side to the upper side of the drawing. The switching unit 300 periodically switches the switches to connect the conductors 125a to 125c to the buffer 140 in order. As a result, among the four conductors 125a, 125b, 125c, and 125d, the conductor corresponding to the pressed position of the base 110 becomes conductive with the buffer 140, and the voltage of the resistance film 120 with respect to the pressed position is buffered. 140 is output. Thus, a position signal corresponding to the pressed position in the longitudinal direction of the base 110 (the left-right direction in FIG. 5) is output.

  On the other hand, the number of contact of the resistance film 120 with the conductors 125a, 125b, 125c, 125d increases as the pressure pressure increases, and as a result, the contact area between the resistance film 120 and the conductor increases. The voltage is increased and the voltage of the electrode 201 is decreased. Conversely, the number of contact of the resistance film 120 with the conductors 125a, 125b, 125c, and 125d decreases as the pressure pressure increases, and as a result, the contact area between the resistance film 120 and the conductor. Decreases, and the voltage of the electrode 201 increases. Therefore, if the output voltage from the electrode 201 is amplified by the amplifier 145, a pressure signal corresponding to the magnitude of the pressing pressure can be obtained. Accordingly, even with this simple configuration, it is possible to simultaneously obtain a pressing position of the base 110 and a signal corresponding to the pressing pressure with a simple configuration using one sensor unit 101.

  In the above description, the resistive film has been described as having a rectangular shape in plan view. However, the resistive film may be formed in a circular shape. When the resistance film is circular, an electrode is provided at the center thereof and a ring-shaped electrode is provided at the periphery thereof, and the base 110 side is configured so that the voltage changes concentrically from the center to the periphery, for example. On the other hand, the base 111 side may be circular in accordance with this, and a circular conductor may be formed on the upper surface of the base 111. In addition, the present apparatus can be applied to an operation unit of a musical instrument that associates a musical scale with a detected position and associates the detected pressure with the intensity of the sound at that musical scale. Needless to say, it is not limited to the operation unit.

  As described above, the present invention can provide a pressed position pressure detecting device that can detect the pressed position and the pressed pressure in the pressed target area.

1 is a configuration diagram of a pressed position pressure detection device 1. FIG. 1 is a configuration diagram of a sensor unit 100. FIG. It is explanatory drawing of the operation | movement which obtains a pressure signal. It is a block diagram of the press position pressure detection apparatus. 2 is a configuration diagram of a sensor unit 101. FIG. It is explanatory drawing of the example of another apparatus structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press position pressure detection apparatus 2 Press position pressure detection apparatus 10 Operational amplifier 11 Operational amplifier 100 Sensor part 101 Sensor part 110 Base 111 Base 120 Resistance film 125 Conductor 130 Spacer 140 Buffer 145 Amplifier 150 Current source 200 Electrode A
201 Electrode B
202 Electrode C

Claims (4)

In the position pressure detection device that detects the pressed position and its pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a conductor formed on one side are disposed so that the resistance film and the conductor face each other. A spacer is provided between the bases,
Power is supplied to the electrode pair at both ends of the resistance film, and the voltage of the resistance film is configured to increase from one end side to the other end side, and an electrode is provided on the conductor.
A position signal output circuit that outputs a position signal based on a signal obtained from the electrode of the conductor;
And a pressure signal output circuit for outputting a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film. In the position pressure detection device that detects the pressed position and its pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor group face each other. And a spacer between both bases,
The power supply is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a diode anode is connected to each conductor of the conductor group. And connect each cathode in common,
A position signal output circuit that outputs a position signal based on a signal obtained from the commonly connected cathodes;
And a pressure signal output circuit for outputting a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film. In the position pressure detection device that detects the pressed position and its pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor group face each other. And a spacer between both bases,
Power is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a cathode of a diode is connected to each conductor of the conductor group And connect each anode in common,
A position signal output circuit that outputs a position signal based on a signal obtained from the commonly connected anodes;
And a pressure signal output circuit for outputting a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film. In the position pressure detection device that detects the pressed position and its pressure in the area to be pressed,
A flexible first base having a resistance film formed on one side and a second base having a plurality of conductor groups formed on one side are provided so that the resistance film and the conductor face each other. And a spacer between both bases,
The power supply is supplied to the electrode pairs at both ends of the resistance film so that the voltage of the resistance film increases from one end side to the other end side, and a plurality of inputs are periodically input to each conductor of the conductor group. Connect the input of the selection switch (300) to switch to and input,
A position signal output circuit that outputs a position signal based on a signal obtained from the output of the selection switch;
And a pressure signal output circuit for outputting a pressure signal based on a signal obtained from an electrode pair at both ends of the resistance film.

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