JP3998315B2 - 3-axis input device - Google Patents

3-axis input device Download PDF

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Publication number
JP3998315B2
JP3998315B2 JP1656298A JP1656298A JP3998315B2 JP 3998315 B2 JP3998315 B2 JP 3998315B2 JP 1656298 A JP1656298 A JP 1656298A JP 1656298 A JP1656298 A JP 1656298A JP 3998315 B2 JP3998315 B2 JP 3998315B2
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Japan
Prior art keywords
electrodes
voltage
axis
input device
point
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JP1656298A
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JPH11212712A (en
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良則 明石
尚子 宮田
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Korg Inc
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Korg Inc
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Description

【０００１】
【発明の属する技術分野】
この発明は各種の入力装置に利用することができる３軸入力装置に関する。
【０００２】
【従来の技術】
従来より図７に示すように２枚の抵抗シート１１と１２をスペーサ１３を介して対向させ、一方の例えば抵抗シート１１に点状に圧接力を与えることにより抵抗シート１１と１２を点接触させ、この点接触した位置をＸ方向とＹ方向に分解して位置データ（電圧）を発生させる２軸入力装置１０が実用されている。
【０００３】
この２軸入力装置１０は２枚の抵抗シート１１と１２のそれぞれにＸ方向の両端に取付けたＸ電極Ｘ1 ，Ｘ2 と、Ｙ方向の両端に取付けたＹ電極Ｙ1 ，Ｙ2 とを具備し、これらのＸ電極Ｘ1 ，Ｘ2 とＹ電極Ｙ1 ，Ｙ2 のそれぞれに時分割的に電圧を印加し、Ｘ電極Ｘ1 とＸ2 の間に電圧を印加した状態でＹ電極Ｙ1 ，Ｙ2 の何れかに発生する電圧を測定して抵抗シート１１と１２の接触点のＸ軸方向の位置を特定し、Ｙ電極Ｙ1 とＹ2 の間に電圧を印加した状態でＸ電極Ｘ1 かＸ2 の何れかに発生する電圧を測定して抵抗シート１１と１２の接触点のＹ軸方向の位置を特定している。このような面状の２軸入力装置は、例えばコンピュータの分野では画面上に映し出されたカーソルの位置を移動させる等の手段として広く利用されている。
【０００４】
しかしながら、例えば電子楽器の分野では発生させる音の周波数を震わせる操作と、音色を変化させる操作に加えて音量を変化させる操作を共通の入力装置で実現したい要求がある。
この要求を実現するには従来は図８に示すように、抵抗シート１１と１２で構成した２軸入力装置１０と、この２軸入力装置１０の下側に感圧シートによって構成した圧力センサ２０を積層し、２軸入力装置１０によってＸ軸方向及びＹ軸方向の位置を入力すると共に、その押圧力を圧力センサ２０によって検出し、この圧力センサ２０によって検出した抵抗値或いは電圧値を利用して音量を制御するなどして３軸入力装置を構成している。
【０００５】
【発明が解決しようとする課題】
上述したように、従来は面状の２軸入力装置を利用して３軸入力装置を構成している。このように従来は、面状の２軸入力装置の外に圧力センサ２０を付加しなければならないから、２軸入力装置１０と圧力センサ２０の双方を必要とし、高価な装置になってしまう欠点がある。
【０００６】
この発明の目的は簡素な構成で安価に作ることができる３軸入力装置を提供しようとするものである。
【０００７】
【課題を解決するための手段】
この発明では面状の抵抗シートによって構成される２軸入力装置に電流源を付加し、この電流源を抵抗シートの一方に装着したＸ電極の一方と、抵抗シートの他方に装着したＹ電極の一方との間に接続し、この状態でＸ電極の他方とＹ電極の何れかとの間に発生する電圧を測定して抵抗シートに与えられる押圧力に対応した電圧値を得るように構成し、Ｘ−Ｙ軸方向の２軸入力に加えてＺ軸方向の入力に対しても検出信号を得ることができる３軸入力装置を提案するものである。
【０００８】
従って、この発明によれば面状の２軸入力装置に電流源を付加するだけで３軸入力装置を得ることができるため、安価に３軸入力装置を提供することができる利点が得られる。
【０００９】
【発明の実施の形態】
図１にこの発明による３軸入力装置の電気回路の構成の一例を示す。図中１０は図７で説明したと同様の面状の２軸入力装置を示す。この２軸入力装置１０の各Ｘ電極Ｘ1 とＸ2 及びＹ電極Ｙ1 とＹ2 のそれぞれに切替器１４Ａ，１４Ｂ．１４Ｃ，１４Ｄを接続する。これら切替器１４Ａ〜１４Ｄは互いに連動して例えば一定の時間間隙で接点ａ〜ｄを切替え動作する。接点ａは入力の有無を検出するモード、接点ｂはＸ軸方向の接触位置を検出するモード、接点ｃはＹ軸方向の接触位置を検出するモード、接点ｄはこの発明で提案する圧接力を検出するモードである。
【００１０】
図２に入力の有無を検出するモードにおける等価回路を示す。図２において１５は図１に示した電圧源、１６は電圧測定手段を示す。１７Ａと１７Ｂは入力点Ｐにおいて分割されるＸ軸方向の抵抗、１８Ａと１８Ｂは入力点Ｐにおいて分割されるＹ軸方向の抵抗を示す。ＳＷ1 は入力点Ｐにおいて抵抗シート１１と１２（図７参照）が接触したときオンとなるスイッチ、１９は抵抗シート１１と１２が接触した際の抵抗シート１１と１２の間に発生する接触抵抗を示す。
【００１１】
入力点Ｐにおいて抵抗シート１１と１２が接触するとスイッチＳＷがオンとなり、電圧測定手段１６に電圧源１５の電圧Ｅ0 が与えられる。従って、切替器１４Ａ〜１４Ｄが接点ａに切替えられている状態で電圧測定手段１６が電圧Ｅ0 を検出すると入力操作有りと判定する。
図３は切替器１４Ａ〜１４Ｄが接点ｂに切替えられた状態の等価回路を示す。このモードは電圧源１５がＸ電極Ｘ1 とＸ2 の間に接続され、Ｘ電極Ｘ2 が共通電位点ＣＯＭに接続される。電圧測定手段１６はＹ電極Ｙ1 と共通電位点ＣＯＭとの間に接続される。従って電圧測定手段１６は抵抗１７Ｂに発生する電圧ＥX を測定することになり、この測定した電圧ＥX により入力点ＰのＸ軸方向の位置を特定する。
【００１２】
図４は切替器１４Ａ〜１４Ｄが接点ｃに切替えられた状態の等価回路を示す。この場合には、電圧源１５はＹ電極Ｙ1 とＹ2 の間に接続され、Ｙ電極Ｙ2 が共通電位点ＣＯＭに接続される。電圧測定手段１６はＸ電極Ｘ2 と共通電位点ＣＯＭとの間に接続される。従って、電圧測定手段１６は抵抗１８Ｂに発生する電圧ＥY を測定することになる。この電圧ＥY を測定することにより入力点ＰのＹ軸方向の位置を特定することができる。
【００１３】
ここまでは従来の技術である。この発明では切替器１４Ａ〜１４Ｄが接点ｄを設けた点を特徴とするものである。図５は切替器１４Ａ〜１４Ｄを接点ｄに切替えた場合の等価回路を示す。
接点ｄに切替えた場合には、電流源２１がＸ電極Ｘ1 と共通電位点ＣＯＭとの間に接続され、Ｙ電極Ｙ2 が共通電位点ＣＯＭに接続され、他方のＸ電極Ｘ2 と共通電位点ＣＯＭとの間に電圧測定手段１６が接続される。従って、電圧測定手段１６は接触抵抗１９と１８Ｂに発生する電圧ＥZ を測定することになる。
【００１４】
ここで接触抵抗１９の抵抗値は入力点Ｐに加える圧接力に反比例し、強く押すと接触抵抗１９の抵抗値は小さくなる方向に変化する。従って電流源２１から出力される電流Ｉ0 を一定電流に制御することにより、電圧ＥZ により入力点Ｐに与える圧接力を測定することができる。この電圧ＥZ を例えば電子楽器の音量制御に用いることにより、３軸方向の入力操作を実現することができる。
【００１５】
図６にこの発明による３軸入力装置を制御する制御器（特に図示していない）の動作を説明するためのフローチャートを示す。ステップＰ１では切替器１４Ａ〜１４Ｄを接点ａに接触させる制御を実行し、入力操作の有無を判別するモードに設定する。
ステップＰ２で入力の有無を判別する動作を繰り返し実行する。ステップＰ２で入力有りを検出すると、ステップＰ３に進む。
【００１６】
ステップＰ３では切替器１４Ａ〜１４Ｄを接点ｂに切替え、入力点ＰのＸ座標を検出するモードに設定し、ステップＰ４に移る。ステップＰ４ではＸ座標を計算し、ステップＰ５に移る。
ステップＰ５では切替器１４Ａ〜１４Ｄを接点ｃに切替え、入力点ＰのＹ座標を検出するモードに切替え、ステップＰ６に移る。ステップＰ６ではＹ座標を計算し、ステップＰ７に移る。
【００１７】
ステップＰ７では切替器１４Ａ〜１４Ｄを接点ｄに切替え、Ｚ軸方向の操作力を検出するモードに切替え、ステップＰ８に移る。
ステップＰ８では入力点Ｐに与えられる操作力を計算し、次のステップＰ９に移る。
ステップＰ９では入力が続けて行われているか否かを判定し、入力操作が続けられているならばステップＰ１に戻り、再度ステップＰ１〜Ｐ９を繰り返す。入力操作が終了すると、ステップＰ９からステップＰ１０に移り、入力プログラムを終了する。
【００１８】
【発明の効果】
以上説明したように、この発明によればＸ軸方向及びＹ軸方向の２軸方向の入力に対しＺ軸方向の入力信号も得ることができる。従って、この発明による３軸入力装置を電子楽器に利用して、例えば入力点ＰをＸ軸方向に移動させることにより発生する音に周波数変調を掛ける。入力点ＰをＹ軸方向に移動させて音色を制御する。入力点Ｐの圧接力を調整し、例えば強く押すと音量が大きくなるように制御する等により、共通の入力装置によって３種類の操作を入力することができる。
【００１９】
また、この発明では従来の２軸入力装置に電流源２１を付加するだけで３軸入力装置を構成できるから、安価に３軸入力装置を提供することができる利点が得られ、その効果は実用に供して頗る大である。
【図面の簡単な説明】
【図１】この発明による３軸入力装置の電気的構成を説明するための接続図。
【図２】この発明による３軸入力装置の入力の有無を判定するモードに設定した場合の等価回路図。
【図３】この発明による３軸入力装置のＸ軸方向の入力点位置を測定するモードの動作を説明するための等価回路図。
【図４】この発明による３軸入力装置のＹ軸方向の入力点位置を測定するモードの動作を説明するための等価回路図。
【図５】この発明による３軸入力装置のＺ軸方向の押圧力を測定するモードの動作を説明するための等価回路図。
【図６】この発明による３軸入力装置の動作を制御する制御器のプログラムの一例を示すフローチャート。
【図７】従来の技術を説明するための分解斜視図。
【図８】従来の３軸入力装置の構成を説明するための分解斜視図。
【符号の説明】
１０ ２軸入力装置
１１，１２ 抵抗シート
１３ スペーサ
１４Ａ〜１４Ｄ 切替器
１５ 電圧源
１６ 電圧測定手段
１７Ａ，１７Ｂ 抵抗
１８Ａ，１８Ｂ 抵抗
１９ 接触抵抗
２１ 電流源[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-axis input device that can be used for various input devices.
[0002]
[Prior art]
Conventionally, as shown in FIG. 7, two resistance sheets 11 and 12 are opposed to each other through a spacer 13, and the resistance sheets 11 and 12 are brought into point contact by applying a pressure contact force to one of the resistance sheets 11, for example. The biaxial input device 10 that generates position data (voltage) by decomposing the point-contacted position in the X direction and the Y direction has been put into practical use.
[0003]
The two-axis input device 10 includes X electrodes X 1 and X 2 attached to both ends in the X direction on two resistance sheets 11 and 12, respectively, and Y electrodes Y 1 and Y 2 attached to both ends in the Y direction. A voltage is applied to each of the X electrodes X 1 and X 2 and the Y electrodes Y 1 and Y 2 in a time-sharing manner, and the voltage is applied between the X electrodes X 1 and X 2 , and the Y electrode The voltage generated in either Y 1 or Y 2 is measured to determine the position of the contact point between the resistance sheets 11 and 12 in the X-axis direction, and the voltage is applied between the Y electrodes Y 1 and Y 2. The voltage generated at either the X electrode X 1 or X 2 is measured to identify the position of the contact point between the resistance sheets 11 and 12 in the Y-axis direction. Such a planar biaxial input device is widely used as a means for moving the position of a cursor displayed on a screen in the field of computers, for example.
[0004]
However, for example, in the field of electronic musical instruments, there is a demand for realizing a common input device for an operation of changing the volume in addition to an operation of shaking the frequency of a generated sound and an operation of changing a timbre.
Conventionally, to achieve this requirement, as shown in FIG. 8, a biaxial input device 10 constituted by resistance sheets 11 and 12 and a pressure sensor 20 constituted by a pressure sensitive sheet below the biaxial input device 10. The two-axis input device 10 inputs the positions in the X-axis direction and the Y-axis direction, and the pressing force is detected by the pressure sensor 20, and the resistance value or voltage value detected by the pressure sensor 20 is used. The three-axis input device is configured by controlling the volume.
[0005]
[Problems to be solved by the invention]
As described above, conventionally, a three-axis input device is configured using a planar two-axis input device. Thus, conventionally, since the pressure sensor 20 must be added outside the planar biaxial input device, both the biaxial input device 10 and the pressure sensor 20 are required, resulting in an expensive device. There is.
[0006]
An object of the present invention is to provide a three-axis input device that can be made at low cost with a simple configuration.
[0007]
[Means for Solving the Problems]
In the present invention, a current source is added to a biaxial input device constituted by a planar resistance sheet, and one of the X electrodes mounted on one side of the resistance sheet and the Y electrode mounted on the other side of the resistance sheet. Connected to one side, and configured to obtain a voltage value corresponding to the pressing force applied to the resistance sheet by measuring the voltage generated between the other of the X electrode and one of the Y electrode in this state, The present invention proposes a three-axis input device capable of obtaining a detection signal for an input in the Z-axis direction in addition to a two-axis input in the XY axis direction.
[0008]
Therefore, according to the present invention, a triaxial input device can be obtained simply by adding a current source to a planar biaxial input device, so that there is an advantage that the triaxial input device can be provided at low cost.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example of the configuration of an electric circuit of a three-axis input device according to the present invention. In the figure, reference numeral 10 denotes a planar biaxial input device similar to that described in FIG. The switches 14A, 14B,... Are respectively connected to the X electrodes X 1 and X 2 and the Y electrodes Y 1 and Y 2 of the biaxial input device 10. 14C and 14D are connected. These switchers 14A to 14D operate to switch the contacts a to d at a fixed time interval in conjunction with each other. Contact a is a mode for detecting the presence or absence of input, contact b is a mode for detecting a contact position in the X-axis direction, contact c is a mode for detecting a contact position in the Y-axis direction, and contact d is a pressure contact force proposed in the present invention. This is the mode to detect.
[0010]
FIG. 2 shows an equivalent circuit in a mode for detecting the presence or absence of input. In FIG. 2, 15 is the voltage source shown in FIG. 1, and 16 is the voltage measuring means. 17A and 17B indicate resistances in the X-axis direction divided at the input point P, and 18A and 18B indicate resistances in the Y-axis direction divided at the input point P. SW 1 is a switch that is turned on when the resistance sheets 11 and 12 (see FIG. 7) contact at the input point P, and 19 is a contact resistance generated between the resistance sheets 11 and 12 when the resistance sheets 11 and 12 contact each other. Indicates.
[0011]
When the resistance sheets 11 and 12 come into contact with each other at the input point P, the switch SW is turned on, and the voltage E 0 of the voltage source 15 is applied to the voltage measuring means 16. Accordingly, when the voltage measuring means 16 detects the voltage E 0 while the switches 14A to 14D are switched to the contact point a, it is determined that there is an input operation.
FIG. 3 shows an equivalent circuit in a state where the switches 14A to 14D are switched to the contact point b. In this mode, the voltage source 15 is connected between the X electrodes X 1 and X 2 , and the X electrode X 2 is connected to the common potential point COM. The voltage measuring means 16 is connected between the Y electrode Y 1 and the common potential point COM. Thus the voltage measuring unit 16 will be measuring the voltage E X generated in the resistor 17B, specifying the X-axis direction position of the input point P with the measured voltage E X.
[0012]
FIG. 4 shows an equivalent circuit in a state where the switches 14A to 14D are switched to the contact c. In this case, the voltage source 15 is connected between the Y electrodes Y 1 and Y 2 , and the Y electrode Y 2 is connected to the common potential point COM. The voltage measuring means 16 is connected between the X electrode X 2 and the common potential point COM. Therefore, the voltage measuring means 16 measures the voltage E Y generated at the resistor 18B. By measuring this voltage E Y , the position of the input point P in the Y-axis direction can be specified.
[0013]
Up to this point, the conventional technique is used. The present invention is characterized in that the switching devices 14A to 14D are provided with a contact point d. FIG. 5 shows an equivalent circuit when the switches 14A to 14D are switched to the contacts d.
When switching to the contact d, the current source 21 is connected between the X electrode X 1 and the common potential point COM, the Y electrode Y 2 is connected to the common potential point COM, and is shared with the other X electrode X 2. Voltage measuring means 16 is connected between the potential point COM. Therefore, the voltage measuring means 16 measures the voltage E Z generated in the contact resistances 19 and 18B.
[0014]
Here, the resistance value of the contact resistance 19 is inversely proportional to the pressure contact force applied to the input point P, and when pressed strongly, the resistance value of the contact resistance 19 changes in a direction of decreasing. Therefore, by controlling the current I 0 output from the current source 21 to a constant current, the pressure contact force applied to the input point P by the voltage E Z can be measured. By using this voltage E Z for volume control of an electronic musical instrument, for example, an input operation in the three-axis direction can be realized.
[0015]
FIG. 6 shows a flowchart for explaining the operation of a controller (not shown) for controlling the three-axis input device according to the present invention. In step P1, control is performed to bring the switching devices 14A to 14D into contact with the contact point a, and a mode for determining whether or not there is an input operation is set.
In step P2, the operation of determining whether or not there is an input is repeatedly executed. If it is detected in step P2 that there is an input, the process proceeds to step P3.
[0016]
In step P3, the switches 14A to 14D are switched to the contact point b, set to a mode for detecting the X coordinate of the input point P, and the process proceeds to step P4. In step P4, the X coordinate is calculated, and the process proceeds to step P5.
In step P5, the switches 14A to 14D are switched to the contact point c to switch to a mode for detecting the Y coordinate of the input point P, and the process proceeds to step P6. In step P6, the Y coordinate is calculated, and the process proceeds to step P7.
[0017]
In step P7, the switching devices 14A to 14D are switched to the contact point d to switch to a mode for detecting the operation force in the Z-axis direction, and the process proceeds to step P8.
In step P8, the operating force applied to the input point P is calculated, and the process proceeds to the next step P9.
In Step P9, it is determined whether or not the input is continuously performed. If the input operation is continued, the process returns to Step P1, and Steps P1 to P9 are repeated again. When the input operation is finished, the process proceeds from step P9 to step P10, and the input program is finished.
[0018]
【The invention's effect】
As described above, according to the present invention, an input signal in the Z-axis direction can be obtained with respect to an input in the biaxial direction of the X-axis direction and the Y-axis direction. Therefore, the three-axis input device according to the present invention is used for an electronic musical instrument, and frequency modulation is applied to the sound generated by moving the input point P in the X-axis direction, for example. The timbre is controlled by moving the input point P in the Y-axis direction. By adjusting the pressure contact force of the input point P and controlling the volume so that, for example, the volume is increased when pressed strongly, three types of operations can be input by a common input device.
[0019]
Further, according to the present invention, since the three-axis input device can be configured only by adding the current source 21 to the conventional two-axis input device, the advantage that the three-axis input device can be provided at low cost is obtained, and the effect is practical. It is great to serve.
[Brief description of the drawings]
FIG. 1 is a connection diagram for explaining an electrical configuration of a three-axis input device according to the present invention;
FIG. 2 is an equivalent circuit diagram when a mode for determining whether or not there is an input of the three-axis input device according to the present invention is set.
FIG. 3 is an equivalent circuit diagram for explaining the operation of the mode for measuring the input point position in the X-axis direction of the three-axis input device according to the present invention.
FIG. 4 is an equivalent circuit diagram for explaining the operation of the mode for measuring the input point position in the Y-axis direction of the three-axis input device according to the present invention.
FIG. 5 is an equivalent circuit diagram for explaining the operation of the mode for measuring the pressing force in the Z-axis direction of the three-axis input device according to the present invention.
FIG. 6 is a flowchart showing an example of a controller program for controlling the operation of the three-axis input device according to the present invention.
FIG. 7 is an exploded perspective view for explaining a conventional technique.
FIG. 8 is an exploded perspective view for explaining the configuration of a conventional three-axis input device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 2-axis input device 11,12 Resistance sheet 13 Spacer 14A-14D Switch 15 Voltage source 16 Voltage measuring means 17A, 17B Resistance 18A, 18B Resistance 19 Contact resistance 21 Current source

Claims (2)

均一な抵抗分布を呈する２枚の抵抗シートがスペーサを介してわずかな間隙を保持して配置され、一方の抵抗シートにはＸ軸方向の両端にＸ電極が装着され、他方の抵抗シートのＹ軸方向の両端にはＹ電極が装着され、上記Ｘ電極間に所定の電圧を印加した状態で上記抵抗シートが一点で接触することにより、上記Ｙ電極に発生する電圧を測定して上記接触点のＸ軸上の位置を特定し、上記Ｙ電極間に所定の電圧を印加した状態で上記抵抗シートが一点で接触することにより、上記Ｘ電極に発生する電圧を測定して上記接触点のＹ軸上の位置を特定して上記抵抗シート上の任意の位置を特定して入力する２軸入力装置において、
上記Ｘ電極の一方とＹ軸電極の一方との間に定電流源を接続し、上記Ｘ電極の他方と上記Ｙ軸電極の何れかとの間の電圧を測定することにより、上記抵抗シート間に与えられるＺ軸方向の操作力に対応した電圧値を得るように構成したことを特徴とする３軸入力装置。Two resistance sheets exhibiting a uniform resistance distribution are arranged with a slight gap therebetween via a spacer, one resistance sheet is provided with X electrodes at both ends in the X-axis direction, and the other resistance sheet has a Y Y electrodes are mounted at both ends in the axial direction, and the resistance sheet contacts at one point with a predetermined voltage applied between the X electrodes, thereby measuring the voltage generated at the Y electrode and measuring the contact points. The position on the X-axis is specified, and the resistance sheet contacts at one point in a state where a predetermined voltage is applied between the Y electrodes, so that the voltage generated at the X electrode is measured and the Y of the contact point is measured. In a two-axis input device that specifies a position on an axis and specifies and inputs an arbitrary position on the resistance sheet,
A constant current source is connected between one of the X electrodes and one of the Y-axis electrodes, and a voltage between the other of the X electrodes and one of the Y-axis electrodes is measured, so that A three-axis input device configured to obtain a voltage value corresponding to a given operation force in the Z-axis direction. 請求項１記載の３軸入力装置において、上記Ｘ電極間に電圧を印加して上記Ｙ電極に発生する電圧を測定するモードと、上記Ｙ電極間に電圧を印加して上記Ｘ電極に発生する電圧を測定するモード及び上記Ｘ電極の一方とＹ電極の一方との間に定電流源を接続し、上記Ｘ電極の他方とＹ電極の何れかとの間の電圧を測定するモードの切替えを切替器によって行う構成としたことを特徴とする３軸入力装置。2. The triaxial input device according to claim 1, wherein a voltage is applied between the X electrodes to measure a voltage generated at the Y electrode, and a voltage is applied between the Y electrodes to generate at the X electrode. Switching between a mode for measuring voltage and a mode for measuring a voltage between the other of the X electrodes and one of the Y electrodes by connecting a constant current source between one of the X electrodes and one of the Y electrodes A three-axis input device characterized in that it is configured by a vessel.
JP1656298A 1998-01-29 1998-01-29 3-axis input device Expired - Fee Related JP3998315B2 (en)

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