JP7008941B2 - Detection device, electronic musical instrument, detection method and control program - Google Patents

Description

The present invention relates to a detection device for detecting an operating position, an electronic musical instrument, a method for detecting an operating position, and a control program for detecting the operating position.

Conventionally, electronic wind instruments that imitate the shapes and playing methods of acoustic wind instruments such as saxophones and clarinets have been known. In the performance of such an electronic wind instrument, the pitch of the musical tone is specified by operating a switch (pitch key) provided at the same key position as the acoustic wind instrument. In addition, the volume is controlled by the pressure of the breath blown into the mouthpiece (breath pressure), and the tone color is controlled by the position of the lips when the mouthpiece is held in the mouth, the contact state of the tongue, the biting pressure, and the like.

Therefore, the mouthpiece of a conventional electronic wind instrument is provided with various sensors for detecting the breath pressure blown during performance, the position of the lips, the contact state of the tongue, the biting pressure, and the like. For example, in Patent Document 1, a plurality of capacitive touch sensors are arranged on the lead portion of the mouthpiece of an electronic wind instrument, and the contact position of the performer's lips is determined based on the detection value and the arrangement position of these sensors. Techniques for detecting the contact state of the tongue are described.

Japanese Unexamined Patent Publication No. 2017-580502

In an electronic wind instrument as described above, when playing while holding the mouthpiece in a holding state, for example, as in an acoustic playing method, the reed part will be held for a long time and the lead part will be held on the air inlet side (tip). The side) will be located in the performer's oral cavity.

Generally, it is known that in a capacitive touch sensor, the detected value fluctuates due to the influence of temperature and humidity. Therefore, due to the transmission of body temperature from the upper and lower lips and the adhesion of saliva by holding the mouthpiece, the detection values of almost all sensors placed on the lead part fluctuate around the position where the mouthpiece is held. do. In addition, if tonguing that brings the tongue into direct contact with the lead causes body temperature transmission or saliva adhesion from the tongue, or if the temperature or humidity in the oral cavity rises due to long-term playing, the mouthpiece There is a tendency that the variation in the detected value of the sensor arranged inside the oral cavity of the (lead portion) and the mixing of noise become larger. It should be noted that the fluctuation of the detection value of the sensor of the reed portion is not limited to the above-mentioned factors, but also occurs due to various factors such as how to hold the mouthpiece and the gender, age, and constitution of the performer. The amount of fluctuation of the detected value in each sensor is not uniform.

As a result, in a conventional electronic wind instrument, the position of the lips (lip position) that is finally detected varies, resulting in an acoustic playing feeling and a musical effect intended by the performer (for example, a timbre effect such as pitch bend or vibrato). ) Was not fully realized in some cases.

In addition to the above-mentioned electronic wind instruments, there are also electronic musical instruments that perform with a part of the body such as fingers other than the lips, and electronic devices that perform various operations other than playing with a part of the body. There is a similar problem that the finally detected operation position may vary depending on the state of the device and the operation environment, and the desired operation may not be realized.

Therefore, in view of the above-mentioned problems, the present invention provides a detection device, an electronic musical instrument, which can determine a more accurate and appropriate operation position when the operator operates the device using a part of the body. It is an object of the present invention to provide a detection method and a control program.

The detection device according to the present invention is one of a plurality of sensors arranged in a specific direction and a sensor having the maximum output value among the plurality of sensors based on the distribution of the output values of the plurality of sensors. The operation position in the specific direction is calculated by selecting some of the sensors arranged on the side of the above and using the output value of the some sensors as a weight value to obtain the weighted average of the arrangement positions of the some sensors. The control unit comprises a control unit for determining the above, and the control unit previously obtains the output value of the sensor close to the sensor having the maximum output value among the partial sensors. It is characterized in that it is corrected so that the output value becomes smaller based on the distribution of the output value of the sensor.

According to the present invention, when an operator operates a device using a part of the body, a more accurate and appropriate operation position can be determined.

It is an external view which shows the whole structure of one Embodiment of the electronic musical instrument to which the detection apparatus which concerns on this invention is applied. It is a block diagram which shows an example of the functional structure of the electronic musical instrument which concerns on one Embodiment. It is a schematic diagram which shows an example of the mouthpiece applied to the electronic musical instrument which concerns on one Embodiment. It is a schematic diagram which shows the contact state between a performer's oral cavity and a mouthpiece. It is a figure which shows the example of the output characteristic of the lip detection part and the tongue detection part, and the example of the lip position in the comparative example 1 in the state where a performer holds a mouthpiece. It is a figure which shows an example of the lip position in the comparative example 2. FIG. It is a figure which shows an example of the sensor output value which is the calculation target of the center of gravity position for determining the lip position in the comparative example 1, and an example of the change of the lip position in the comparative example 1. FIG. It is a figure which shows the example of the sensor output value which is the calculation target of the center of gravity position for determining the lip position in the comparative example 2, and the example of the change of the lip position in the comparative example 2. It is a graph which shows an example of the change of the lip position in Comparative Examples 1 and 2 and this Embodiment. It is a figure (the 1) for demonstrating the correction coefficient applied to the method of determining a lip position which concerns on one Embodiment. It is a figure (the 2) for demonstrating the correction coefficient applied to the method of determining a lip position which concerns on one Embodiment. It is a figure which shows an example of the correction process of the sensor output value applied to the method of determining a lip position which concerns on one Embodiment, and the calculation example of a lip position. It is a figure which shows an example of the sensor output value which is the calculation target of the correction coefficient used for the correction process of the sensor output value applied to one Embodiment, and the calculation example of the correction coefficient which concerns on this Embodiment. It is a figure which shows an example of the sensor output value which is the object of calculation of the center of gravity position for determining the lip position in one Embodiment, and the example of the change of the lip position in this Embodiment. It is a flowchart which shows the main routine of the control method in the electronic musical instrument which concerns on one Embodiment. It is a flowchart which shows the process of the lip detection part applied to the control method of the electronic musical instrument which concerns on one Embodiment.

Hereinafter, embodiments of a detection device, an electronic musical instrument, a detection method, and a control program according to the present invention will be described in detail with reference to the drawings. Here, an example of an electronic musical instrument to which a detection device for detecting an operating position is applied, and a method for detecting the operating position and a method for controlling an electronic musical instrument to which a control program for detecting the operating position is applied will be described.

<Electronic musical instrument>
FIG. 1 is an external view showing the overall structure of an embodiment of an electronic musical instrument to which the detection device according to the present invention is applied. FIG. 1A is a side view of the electronic musical instrument according to the present embodiment, and FIG. 1B is a front view of the electronic musical instrument. Further, in the figure, the IA part shows a partially see-through part of the electronic musical instrument 100.

The electronic musical instrument 100 to which the detection device according to the present invention is applied has an appearance imitating the shape of a saxophone of an acoustic wind instrument, for example, as shown in FIGS. 1 (a) and 1 (b). In the electronic musical instrument 100, a mouthpiece 10 to which a player (user) holds a mouth is attached to one end side (upper end side in the drawing) of a tube body portion 100a having a tubular housing, and the other end side (lower end side in the drawing). ) Is provided with a sound system 9 having a speaker that outputs a musical sound.

Further, on the side surface of the tube portion 100a, there are a performance key for determining the pitch by being operated by the performer with a finger, a setting key for setting a function of changing the pitch according to the key of the music, and the like. An operator 1 is provided. Further, for example, as shown in the IA section of FIG. 1 (b), a breath pressure detecting section 2, a CPU (Central Processing Unit) 5 as a control means, and a ROM are placed on a substrate provided inside the tube section 100a. (Read Only Memory) 6, RAM (Random Access Memory) 7, and sound source 8 are provided.

FIG. 2 is a block diagram showing an example of the functional configuration of the electronic musical instrument according to the present embodiment.
As shown in FIG. 2, the electronic musical instrument 100 according to the present embodiment generally includes an operator 1, a breath pressure detection unit 2, a lip detection unit 3, a tongue detection unit 4, a CPU 5, a ROM 6, and a RAM 7. And a sound source 8 and a sound system 9, and each part of these except the sound system 9 is connected to each other via a bus 9a. Here, the lip detection unit 3 and the tongue detection unit 4 are provided on the lead unit 11 of the mouthpiece 10, which will be described later. The functional configuration shown in FIG. 2 is an example for realizing the electronic musical instrument according to the present invention, and is not limited to this configuration. Further, among the functional configurations of the electronic musical instrument shown in FIG. 2, at least the lip detection unit 3 and the CPU 5 constitute a detection device according to the present invention.

The operator 1 accepts key operations by the performer for various keys such as the performance key and the setting key described above, and outputs the operation information to the CPU 5. Here, the setting key provided on the controller 1 has, specifically, a function of changing the pitch according to the key of the musical piece, a function of finely adjusting the pitch, and a function of setting the tone color. It has a function of preliminarily selecting a mode finely adjusted according to the contact state of the performer's lip (lower lip) detected by the lip detection unit 3 from the timbre, volume, and pitch of the musical sound.

The breath pressure detection unit 2 detects the breath pressure (breath pressure) blown into the mouthpiece 10 by the performer, and outputs the breath pressure information to the CPU 5. The lip detection unit 3 has a capacitance type touch sensor that detects the contact of the performer's lip, and lips the capacitance according to the contact position or range of the lip, and the contact area and contact strength thereof. Is output to the CPU 5 as the detection information of. The tongue detection unit 4 has a capacitance type touch sensor that detects the contact of the tongue (tongue portion) of the performer, and determines the capacitance according to the presence or absence of contact of the tongue and the contact area of the tongue. It is output to the CPU 5 as detection information.

The CPU 5 functions as a control unit that controls each unit of the electronic musical instrument 100. The CPU 5 reads a predetermined program stored in the ROM 6 and expands it in the RAM 7, and executes various processes in cooperation with the expanded program. For example, the CPU 5 inputs the operation information input from the operation element 1, the breath pressure information input from the breath pressure detection unit 2, the lip detection information input from the lip detection unit 3, and the tongue detection unit 4. Based on the detected tongue detection information, the sound source 8 is instructed to generate a musical sound.

Specifically, the CPU 5 sets the pitch of the musical tone based on the pitch information as the operation information input from the operator 1. Further, the CPU 5 sets the volume of the musical tone based on the breath pressure information input from the breath pressure detection unit 2, and based on the lip detection information input from the lip detection unit 3, the tone color and volume of the musical tone. Fine-tune at least one of the pitches. Further, the CPU 5 determines whether or not the tongue is in contact with the lead unit 11 based on the tongue detection information input from the tongue detection unit 4, and note-on (pronunciation) or note-off (pronunciation cancellation) of the musical tone. To set.

The ROM 6 is a read-only semiconductor memory, and stores various data and programs for controlling operations and processes in the electronic musical instrument 100. In particular, in the present embodiment, a program for realizing a method for determining a lip position (corresponding to a method for detecting an operating position according to the present invention) applied to a control method for an electronic musical instrument described later is stored. The RAM 7 is a volatile semiconductor memory, and is a data or program read from the ROM 6, data generated during the execution of the program, an operator 1, a breath pressure detection unit 2, a lip detection unit 3, and a tongue detection. It has a work area for temporarily storing each detection information output from the unit 4.

The sound source 8 is a synthesizer, and follows a musical tone generation instruction of the CPU 5 based on the operation information from the operator 1, the lip detection information from the lip detection unit 3, and the tongue detection information from the tongue detection unit 4. A signal is generated and output to the sound system 9. The sound system 9 performs processing such as signal amplification on the musical tone signal input from the sound source 8 and outputs it as a musical tone from the built-in speaker.

(Mouthpiece)
Next, the structure of the mouthpiece applied to the electronic musical instrument according to the present embodiment will be described.
FIG. 3 is a schematic view showing an example of a mouthpiece applied to the electronic musical instrument according to the present embodiment. Here, FIG. 3A is a cross-sectional view of the mouthpiece (cross-sectional view taken along the line IIIA-IIIA in FIG. 3B), and FIG. 3B is a bottom view showing the lead portion side of the mouthpiece. be.

As shown in FIGS. 3A and 3B, the mouthpiece 10 roughly includes a mouthpiece main body 10a, a lead portion 11, and a fixing bracket 12. In the mouthpiece 10, a thin plate-shaped lead portion 11 is assembled and fixed by a fixing bracket 12 so as to have a slight gap with respect to the opening 13 of the mouthpiece main body 10a so as to serve as a breathing port for the performer. There is. That is, the reed portion 11 is assembled at a position on the lower side (lower side of FIG. 3A) of the mouthpiece main body 10a and is fixed by the fixing metal fitting 12, similarly to the reed of a general acoustic wind instrument. The portion (hereinafter referred to as "heel") is a fixed end, and the air inlet side (hereinafter referred to as "tip side") forms a free end.

Further, as shown in FIGS. 3A and 3B, for example, the lead portion 11 has a lead substrate 11a made of a thin plate-shaped insulating member and a tip side in the longitudinal direction (left-right direction in the drawing) of the lead substrate 11a. It has a plurality of sensors 20, 30 to 40, which are arranged from (one end side) to the heel side (the other end side). Here, the sensor 20 arranged on the tip side of the lead unit 11 is a capacitive touch sensor possessed by the tongue detection unit 4, and the sensors 30 to 40 are the capacitance type possessed by the lip detection unit 3. It is a type of touch sensor. Further, the sensor 40 arranged on the innermost side (that is, the heel side) of the lead portion 11 may also serve as a temperature sensor. Each of these sensors 20, 30 to 40 has an electrode as a sensing pad. Here, the electrodes forming the sensors 30 to 40 have a rectangular planar shape having substantially the same width and length, and the electrodes are arranged at substantially equal intervals from the tip side to the heel side of the lead portion 11. Has been done.

In FIG. 3B, the electrodes forming the sensors 30 to 40 are shown in a rectangular shape, but the present invention is not limited to this, and the present invention is not limited to this, and has a planar shape such as a V shape or a wave shape. In addition, each electrode may be set to an arbitrary size or number.

(Contact state between mouthpiece and oral cavity)
Next, the contact state between the mouthpiece described above and the oral cavity of the performer will be described.
FIG. 4 is a schematic view showing a contact state between the performer's oral cavity and the mouthpiece.

When playing the electronic musical instrument 100, the performer puts the upper front tooth E1 on the upper part of the mouthpiece body 10a and involves the lower front tooth E2 with the lower lip (lower lip) LP, for example, as shown in FIG. , Press against the lead portion 11. As a result, the mouthpiece 10 is sandwiched and held from above and below by the upper front teeth E1 and the lip LP.

At this time, the CPU 5 outputs a sensor output value (that is, detection from the lip detection unit 3) according to the contact state of the lip LP, which is output from a plurality of sensors 30 to 40 of the lip detection unit 3 arranged in the lead unit 11. Information), a process of determining the contact position (lip position) of the lip LP is executed. Then, the tone color (pitch) of the musical tone generated based on the determined contact position (lip position) of the lip LP is controlled. At this time, when the timbre (pitch) is controlled so as to be closer to the blowing feeling of the acoustic wind instrument, the CPU 5 determines the lip position (strictly speaking, the end of the inside of the oral cavity of the lip LP shown in FIG. 4). Based on the distance between the two points and the end of the lead portion 11 on the tip side, the virtual vibration state of the lead portion 11 is estimated, and the timbre (pitch) generated based on the vibration state is emulated. The tone color (pitch) is controlled so as to rate. Further, when it is not necessary to bring it closer to the playing feeling of an acoustic wind instrument, it is peculiar to an electronic wind instrument simply based on a predetermined tone (pitch) corresponding to the contact position (lip position) of the lip LP. It may be controlled so as to generate the tone color (pitch) of.

Further, as shown in FIG. 4, the tongue (tongue part) inside the oral cavity during performance is in a state where the tongue TN does not touch the lead part 11 (indicated by a solid line in the figure) according to the playing method of the electronic musical instrument 100. It is either in the state of touching the lead portion 11 (indicated by a two-dot chain line in the figure). The CPU 5 is based on a sensor output value (that is, detection information from the tonguing detection unit 4) corresponding to the contact state of the tonguing TN, which is output from the sensor 20 arranged at the tip-side end of the lead unit 11. The execution state of tonguing, which is a playing method in which the tonguing TN is brought into contact to stop the vibration of the lead portion 11, is determined, and the note-on and note-off of the musical sound are controlled.

(Output characteristics of lip detection unit and tongue detection unit)
Next, the output characteristics of the lip detection unit and the tongue detection unit when the player holds the mouthpiece described above will be described.

FIG. 5 is a diagram showing an example of output characteristics (distribution of sensor output values) of the lip detection unit and the tongue detection unit in a state where the performer holds the mouthpiece, and an example of the lip position in Comparative Example 1. Here, FIG. 5A shows a state in which the performer is just holding the mouthpiece as shown in FIG. 4 (the tonguing shown by the solid line does not touch the lead portion 11 and is not tonguing. It is a figure which shows the distribution example of the sensor output value (detection information) of a lip detection part in a state). Further, FIG. 5 (b) is an example (comparative example 1) of the lip position determined based on the sensor output value shown in FIG. 5 (a). Further, FIG. 5C shows a state in which the performer is holding the mouthpiece and tonguing as shown in FIG. 4 (a state in which the tonguing TN represented by the alternate long and short dash line is in contact with the lead portion 11). It is a figure which shows the distribution example of the sensor output value (detection information) of a lip detection part and a tonguing detection part. Hereinafter, the same notation will be used in FIGS. 6 and later.

In the distribution diagram of the sensor output values shown in FIGS. 5A and 5C, the horizontal axis is the position PS of each of the sensors 20, 30 to 40 arranged from the tip side to the heel side on the lead substrate 11a. _TN , PS0 to PS10 are shown, and the vertical axis is the output value output from the sensors 20, 30 to 40 of each position PS _TN , PS0 to PS10 (capacitance value is A / D converted to 0 to 255). The sensor output value indicating the value of 8 bits) is shown. Here, in the distribution diagram shown in FIG. 5A, among the sensors 20, 30 to 40 arranged in the lead portion 11, the sensors 20 and 30 at the positions PSTN and _PS0 arranged on the tip side are excluded. Then, only the sensor output values from the sensors 31 to 40 at the positions PS1 to PS10 are shown.

As described above, in the mouthpiece 10 according to the present embodiment, the contact state of the lip (lower lip) LP and the tongue (tongue portion) TN to the lead portion 11 is determined by the plurality of sensors 20 arranged on the lead substrate 11a. , 30 to 40, based on the capacitance in each electrode, for example, a method of detecting with an output value of 256 steps is adopted. Here, since the plurality of sensors 20, 30 to 40 are arranged in a row in the longitudinal direction of the lead substrate 11a, when the performer normally holds the mouthpiece 10 and does not perform tonguing, FIG. 5 ( As shown in a), the region where the lip LP is in contact with the lead portion 11 and the sensors in the vicinity thereof (for example, sensors 34 to 36 at positions PS4 to PS6) react with each other, and the sensor output value shows a high value. ..

On the other hand, from the sensors in the area not touched by the lip LP (that is, the tip side and the heel side of the area touched by the lip LP) (for example, sensors 31, 32, 38 to 40 at positions PS1, PS2, PS8 to PS10). The sensor output value of is relatively low. That is, as shown in FIG. 5A, the distribution of the sensor output values output from the sensors 31 to 40 of the lip detection unit 3 in this case is the sensor at the position where the performer most strongly contacts the lip LP. It has a feature showing a chevron shape with the sensor output value from (generally the sensors 34 to 36 at positions PS4 to PS6) as the maximum value.

(How to determine the lip position)
Next, a method of determining the contact position (lip position) of the lip when the performer holds the mouthpiece will be described based on the distribution of the sensor output values as shown in FIG. 5A.

As a method of determining the lip position based on the distribution of the sensor output value as shown in FIG. 5A, a general method of calculating the position of the center of gravity can be applied. Specifically, the center of gravity position x _G is the following equation (11) based on the sensor output values _{mi from a plurality of sensors that detect the contact state of the lip and the number x i indicating} the position of each sensor. Is calculated by.

In the above equation (11), n is the number of sensor output values used for calculating the center of gravity position x _G. Here, as described above, the sensor output values m of 10 (n = 10) sensors 31 to 40 excluding the sensors 20 and 30 among the sensors 20 and 30 to 40 arranged in the lead portion 11. _i is used to calculate the center of gravity position x _G. Further, the position numbers x _i (= 1, 2, ... 10) of each sensor are set corresponding to the positions PS1 to PS10 of these sensors 31 to 40. That is, the method of calculating the center of gravity position x _G shown in the equation (11) is an operation for obtaining the average position based on the distribution of the arrangement positions of the sensors, and when the average position is obtained, the position of each sensor is used. On the other hand, it is a weighted average calculation that multiplies the output value of each sensor as a weight value. Here, the reason for excluding the sensor output values from the sensors 20 and 30 among the sensors 20 and 30 to 40 arranged in the lead portion 11 is that the sensor output values are prominently high due to tonguing as described above. This is to eliminate or suppress the influence on the accurate calculation of the lip position.

As shown in FIG. 5A, the above equation (11) is used based on the distribution of the sensor output values obtained when the performer normally holds the mouthpiece 10 and does not perform tonguing. When the center of gravity position x _G is calculated to obtain the lip position PS (1-10), a numerical value of "5.1" is obtained as shown in FIG. 5 (b). This numerical value represents the lip position by the position number of the sensor. That is, it is represented by the relative position of each of the sensors 31 to 40 represented by the position numbers 1 to 10 with respect to the positions PS1 to PS10, and is represented by a numerical value including a decimal number of 1.0 to 10.0. Further, Total1 shown in the figure is the molecule of the above equation (11), and is the sum of the products of the sensor output value mi and the position number _xi in each sensor 31 to 40, and _Total2 is the above-mentioned molecule. It is the denominator of the equation (11), and is the sum of the sensor output values _mi from each sensor 31 to 40. The lip position PS (1-10) shown in the figure is converted into a MIDI signal which is a numerical value expressed by 7 bits when used in the sound source 8 (the range from the positions PS1 to PS10 is 0 to 127). It is used after (assigning to a value). Specifically, as shown in the following equation (12), 127/9 is obtained after subtracting 1 from the numerical value of the lip position PS (1-10) which is the center of gravity position x _G calculated by the equation (11). To be multiplied. For example, if the lip position PS (1-10) is "5.1", the numerical value "58" obtained by the equation (12) is used as a MIDI signal expressed by 7 bits.

On the other hand, when the performer is holding the mouthpiece 10 and performing tonguing, the sensor 20 touched by the tongue TN (indicated by the position PS _TN in the figure) reacts as shown in FIG. 5 (c). Then, the sensor output value is prominently high. At this time, the sensor near the sensor 20 touched by the tongue TN1 and the sensor located in the player's oral cavity (for example, the sensors 30 to 33 at positions PS0 to PS3) also react, and the sensor output value fluctuates (increases). ) May.

That is, as described above, in the capacitive touch sensors applied to the sensors 20, 30 to 40 arranged in the lead portion 11, it is known that the detected value fluctuates due to the influence of temperature and humidity. There is. Specifically, it is known that the sensor output values output from substantially all the sensors 20, 30 to 40 increase as the temperature of the lead portion 11 rises, which is generally called temperature drift. .. Here, the change in the temperature state of the reed portion 11 that occurs during the performance of the electronic musical instrument 100 is particularly greatly affected by the fact that the body temperature is transmitted to the entire reed substrate 11a by touching the lip LP. In addition, the tonguing causes the tonguing TN to directly touch the lead portion 11, and the temperature and humidity in the oral cavity rise due to the mouthpiece 10 being held for a long time, thereby causing the lead substrate 11a to rise. As a part of the temperature rises, as shown in the VC section of FIG. 5C, the sensor output values from the sensors 20 and 30 to 33 of the PSTN and _PS0 to PS3 where the temperature has risen fluctuate or become noise. May fluctuate due to contamination.

Therefore, the center of gravity position (or weighted average) is calculated using the above equation (11) for the sensor output values from all or most of the sensors of the lip detection unit 3 as described above, and the lip position is determined. When the method is applied, the lip position PS (1-10) deviates from the original position of the lip position, and it becomes impossible to sufficiently realize the effect of the brass band and the musical sound intended by the performer in the sound processing described later. In some cases. In addition, in this specification, as shown in FIGS. ) Is used to calculate the position of the center of gravity (or weighted average) to obtain the lip position, which is referred to as "Comparative Example 1" for convenience.

FIG. 6 is a diagram showing an example of the lip position in Comparative Example 2. FIG. 6A is an example of a lip position determined based on the sensor output values shown in FIGS. 6B and 6C. Here, in the left table of FIG. 6A, the sensor output value that is the maximum value in the distribution of the sensor output values from the sensors 31 to 40 arranged at the positions PS1 to PS10 is halved for convenience. It is shown by a thick line frame with tones. Further, FIGS. 6B and 6C are diagrams showing distribution examples of sensor output values for which the position of the center of gravity for determining the lip position is calculated.

As a method for solving the problem in Comparative Example 1 as described above, the sensor output value from the sensor arranged on the tip side of the lead portion 11, which is easily affected by tonguing and the temperature and humidity in the oral cavity, is set to the lip position. It is conceivable to apply a method of excluding from the calculation target when determining. For example, as shown in FIGS. 6 (a) to 6 (c), when the distribution of the sensor output value equivalent to that of FIG. 5 (a) is shown, the position of the sensor at which the sensor output value becomes the maximum value max (1-10). Rather, the center of gravity position (or weighted average) is calculated using the above equation (11) based only on the sensor output value from the sensor arranged on the back side (heel side) of the mouthpiece 10, and the lip position. The method of finding is applicable. In the present specification, this method is referred to as "Comparative Example 2" for convenience.

In such a method of Comparative Example 2, the position of the sensor where the sensor output value is the maximum value max (1-10), that is, the position where the lip LP is in strong contact with the lead portion 11 (FIG. 6 (b)). Then, only the sensor output value from the sensor arranged on the heel side, which is the outside of the oral cavity (sensors 35 to 40 at positions PS5 to PS10 in FIG. 6 (b)), rather than the position PS4) of the sensor 34, is used as the center of gravity. It is the target of calculation. In FIG. 6B, the sensor output values of the non-target sensors are shown by a broken line bar graph in order to clearly indicate the calculation target. As a result, the lip position is not affected by the above-mentioned tonguing and the fluctuation of the sensor output value due to the temperature and humidity in the oral cavity (the fluctuation of the sensor output value shown in the VC portion of FIG. 5C). The deviation can be suppressed.

However, in the method of Comparative Example 2 described above, the sensor having the maximum sensor output value shifts to the adjacent sensor, as in the case where the performer changes the position where the mouthpiece 10 is held during the performance. As a result, when the position number changes (increases or decreases), the numerical value of the lip position may change significantly.

For example, the contact state “ST1” of the lip LP in the left table of FIG. 6 (a) and the position of the sensor where the sensor output value becomes the maximum value max (1-10) as shown in FIG. 6 (b) are “. In the case of "PS4", the center of gravity position (or weighted average) is used by the above equation (11) based only on the sensor output values of the sensors 35 to 40 arranged at the positions PS5 to PS10 on the heel side of the position PS4. ) Is calculated to obtain the lip position PS (Right), and as shown in the table on the right side of FIG. 6A, the numerical value “6.18” is obtained.

On the other hand, by changing the position where the player holds the mouthpiece 10, for example, as shown in the contact state “ST2” of the lip LP in the left table of FIG. 6A and FIG. 6C. In addition, when the position of the sensor whose sensor output value is the maximum value max (1-10) changes from "PS4" to "PS5", the sensors 36 arranged at the positions PS6 to PS10 on the heel side of the position PS5. When the lip position PS (Right) is similarly obtained based only on the sensor output values of to 40, the numerical value of "7.00" is obtained as shown in the right table of FIG. 6A.

As described above, in the method of Comparative Example 2, the lip position PS (Right) calculated by changing (increasing or decreasing) the position number of the sensor whose sensor output value is the maximum value max (1-10). The value of is greatly changed (in the above example, the change is "0.82" from "6.18" to "7.00").

Here, the change in lip position determined by the methods shown in Comparative Example 1 and Comparative Example 2 described above will be described in detail.
FIG. 7 is a diagram showing an example of a sensor output value for which the center of gravity position for determining the lip position in Comparative Example 1 is calculated, and an example of a change in the lip position in Comparative Example 1. FIG. It is a figure which shows an example of the sensor output value which is the calculation target of the center of gravity position for determining the lip position in the comparative example 2, and an example of the change of the lip position in the comparative example 2. Further, FIG. 9 is a graph showing an example of changes in the lip position in Comparative Examples 1 and 2 and the present embodiment. In the graph of the change in lip position shown in FIG. 9, the horizontal axis is the position on the lead portion 11 of the mouthpiece 10 held by the performer, and the plurality of sensors 31 arranged on the lead substrate 11a. The positions from 40 to 40 are subdivided into each position from 1 to 26 and expressed relatively, and the vertical axis indicates the lip position (a numerical value including a decimal number from 1.0 to 10.0).

In Comparative Example 1, as shown in the left table of FIG. 7, substantially all sensors (for example, position PS) arranged in the lead portion 11 are calculated as the center of gravity position (or weighted average) for determining the lip position. The sensor output values from the sensors 31 to 40 at positions PS1 to PS10, excluding the sensors 20 and 30 of _TN and PS0, are used. Here, in order to simulate a state in which the performer is holding an arbitrary position on the lead portion 11 of the mouthpiece 10, a plurality of sensors 31 to 40 are arranged on the lead substrate 11a from the tip side in the heel direction. , A member imitating a lip (for example, a pseudo-member such as a conductive rubber having the same electrical characteristics as a lip or a finger) at a constant pitch (for example, at 10 μm intervals) so as to correspond to each relative position from 1 to 26. An experiment was conducted in which the sensors were brought into contact with each other and the sensor output values output from the sensors 31 to 40 at that time were acquired. The sensor output values from the sensors 31 to 40 shown in the left table of FIG. 7 are the temperatures caused by the temperature and humidity in the oral cavity due to the performer not tonguing and holding the mouthpiece. It corresponds to the sensor output value assuming ideal experimental conditions that are not affected by drift or noise due to contact with the human body (or offset from the effects of temperature drift and noise). Further, in the left table of FIG. 7, the maximum value max (1-10) of the distribution of the sensor output values from the sensors 31 to 40 acquired when the pseudo member is brought into contact with each of the above relative positions. The sensor output value is shown in a thick line frame with halftone for convenience (hereinafter the same).

In this way, the position where the lip LP contacts is set to a subdivided narrow pitch, and the center of gravity position (or weighted average) is set based on all the sensor output values output from the sensors 31 to 40 at each relative position. By calculation, the lip position PS (1-10) at each relative position is determined as shown in the right table of FIG. 7. The graph showing the lip position PS (1-10) for each relative position (1 to 26) where the lip LP on the lead substrate 11a contacts is shown by a thin solid line in FIG.

As is clear from the results of this experiment, the performer is not tonguing, and the ideal conditions are not affected by the temperature drift caused by holding the mouthpiece, or the temperature and humidity in the oral cavity. Then, as shown in the graph of FIG. 9, as the contact position of the lip LP moves from the tip side of the lead portion 11 toward the heel at a constant pitch, the numerical value of the lip position PS (1-10) is continuous. Shows a tendency to increase smoothly.

On the other hand, in Comparative Example 2, as shown in the left table of FIG. 8, the sensor 31 shown in the left table of FIG. 7 is calculated as the center of gravity position (or weighted average) for determining the lip position. Of each sensor output value from 40 to 40, it is placed on the heel side from the position of the sensor where the sensor output value is the maximum value max (1-10) (indicated by the thick line frame with halftone for convenience). Only the sensor output value from the sensor is used. That is, the position where the lip LP comes into contact with the performer holding the mouthpiece 10 and the sensor output value from the sensor located inside the oral cavity from the position are the calculation of the center of gravity position (or weighted average). Excluded from the target.

As described above, among the sensor output values from the sensors 31 to 40 shown in the left table of FIG. 7, the sensor output values from the sensors arranged at the positions susceptible to tanging and the temperature and moisture in the oral cavity. By calculating the center of gravity position (or weighted average) based only on the sensor output value from the sensor placed outside the oral cavity, the lip position at each relative position as shown in the right table of FIG. PS (Right) is determined. The graph showing the lip position PS (Right) for each relative position (1 to 26) where the lip LP on the lead substrate 11a comes into contact is a graph shown by a thin dotted line in FIG.

As is clear from the results of this experiment, the position of the center of gravity (or weighting) uses only the sensor output value from the sensor located on the heel side of the position of the sensor where the sensor output value is the maximum value max (1-10). When the average) is calculated, as shown in the graph of FIG. 9, the contact position of the lip LP moves from the tip side to the heel side of the lead portion 11 at a constant pitch, and the lip position PS ( The value of Right) increases sharply at a specific relative position and shows a tendency to change stepwise or stepwise.

The tendency of the lip position PS (Right) to change in Comparative Example 2 is due to the following reasons. That is, in Comparative Example 2, as shown in FIGS. 6 (b) and 6 (c) and the left table of FIG. 8, the sensor whose output value is the maximum value max (1-10) is the target for calculating the lip position. Only the sensor output value from the sensor located on the heel side of the position of is used. In this case, with respect to the sensor whose maximum sensor output value is max (1-10), the sensor arranged adjacent to the heel side (for example, in FIG. 6B, the sensor 35 at position PS5 and FIG. 6 ( In c), the sensor output value from the sensor 36) at the position PS6 may show a high value close to the maximum value max (1-10). In such a case, if the lip position PS (Right) is determined by the method of calculating the center of gravity position (or weighted average) using the above equation (11), the calculation result approximates the maximum value max (1-10). It will be greatly affected by the sensor output value that shows a high value.

Further, when the relative position where the lip LP contacts is within the range of the same sensor (electrode), the lip position PS (Right) shows a substantially constant value and the change is suppressed (shown in FIG. 9). It becomes a substantially flat part). On the other hand, the position of the sensor whose sensor output value is the maximum value max (1-10) is the position of the sensor arranged adjacent to the position of the specific sensor (for example, the position PS4 shown in FIG. 6B). For example, when the position changes to the position PS5) shown in FIG. 6 (c), the range of the sensor for which the position of the center of gravity (or the weighted average) is calculated also changes.

That is, as the position of the sensor having the maximum value max (1-10) changes by one (for example, PS4 → PS5), the position of the center of gravity (or weighted average) is on the tip side in the range of the sensor to be calculated. The position that becomes the boundary is also moved to the heel side by one (for example, PS5 → PS6), and the position number is incremented by 1 in integer units. Therefore, if the lip position PS (Right) is determined by the method of calculating the center of gravity position (or weighted average) using the above equation (11), the calculation result will increase by about 1 and the above maximum value max. It shows a change in which the lip position PS (Right) increases sharply with the change in the position of the sensor (1-10) (that is, for each pitch between the sensors arranged adjacent to each other).

Therefore, in this embodiment, the following series of methods are adopted. First, based on the distribution of the sensor output values from the sensors 31 to 40 of the lip detection unit 3 arranged in the lead unit 11, the position where the performer strongly holds the mouthpiece 10 (that is, the sensor output value is the maximum value). The position of the sensor) is extracted, and the sensor output value from the sensor arranged on the back side (heel side) of the mouthpiece from the position is extracted as a calculation target. Then, among the extracted sensor output values to be calculated, a predetermined correction coefficient is used for the sensor output value from the sensor arranged adjacent to the sensor having the maximum sensor output value. Execute the correction process that was used. Then, the center of gravity position (or weighted average) is calculated using the above equation (11) based only on the sensor output value to be calculated, including the corrected sensor output value, and the lip position is determined. do.

(How to determine the lip position)
Hereinafter, the method of determining the lip position applied to the present embodiment will be described in detail.

10 and 11 are diagrams for explaining the correction coefficient applied to the method for determining the lip position according to the present embodiment. Here, FIG. 10 (a) is an example of a correction coefficient determined based on the sensor output values shown in FIGS. 10 (b) and 10 (c) and FIGS. 11 (a) and 11 (b). Further, FIGS. 10 (b) and 10 (c) and FIGS. 11 (a) and 11 (b) explain the change in the position of the sensor at which the sensor output value becomes the maximum value and the change characteristic of the sensor output value of the adjacent sensor. It is a figure for. FIG. 12 is a diagram showing an example of sensor output value correction processing applied to the lip position determination method according to the present embodiment and an example of lip position calculation. Here, FIG. 12A is an example of a lip position determined based on the sensor output value after the correction processing shown in FIGS. 12B and 12C. Further, FIGS. 12 (b) and 12 (c) are diagrams showing an example of correction processing of the sensor output value for which the position of the center of gravity for determining the lip position is calculated.

In the method for determining the lip position according to the present embodiment, first, as in Comparative Example 2 described above, the sensor output value is based on the distribution of the sensor output values from the sensors 31 to 40 arranged in the lead portion 11. The position of the sensor that has the maximum value max (1-10) is extracted, and the sensor output value from the sensor placed on the back side (heel side) of the mouse piece 10 from the position is calculated by the above equation (11). Extract as a target for calculating the indicated center of gravity position (or weighted average).

Here, in the present embodiment, for example, as shown in FIGS. 6A and 6B, the sensor output value among the sensor output values extracted as the above calculation target is the maximum value max (1-). 10) The sensor output value from the sensor placed one next to the position of the sensor on the back side (heel side) of the mouse piece 10 (corresponding to one right side in the distribution shown in the figure). Focus on R1 and the sensor output value R2 from the sensors arranged two adjacent to each other (corresponding to two right neighbors in the distribution shown in the figure). By focusing on the sensor output value from the sensor located close to the sensor whose sensor output value is the maximum value max (1-10) and monitoring the change, the sensor output value can be increased. It is possible to predict the change in the position number of the sensor that reaches the maximum value max (1-10), the timing of the change, or how close to that timing.

For example, as shown in FIGS. 10 and 11, when the position of the sensor whose sensor output value is the maximum value max (1-10) changes from PS4 to PS5 to ..., the position number increases by one from the position PS5. In the meantime, for example, as shown in the left table of FIG. 10A, the sensor output value from the sensor 37 at the position PS7 next to each other increases sharply from "47" → "61" → "94". Show a tendency to do. In this way, the change in the sensor output value from the sensor placed near the sensor whose sensor output value is the maximum value max (1-10) has a certain regularity, and therefore this change in the sensor output value. By monitoring, the possibility that the sensor whose sensor output value is the maximum value max (1-10) shifts to the adjacent sensor and its position number is likely to change, and the timing of the change can be checked. You can judge.

In this embodiment, paying attention to such a change characteristic of the sensor output value, as shown in the following equation (13), the sensor output value is close to the sensor having the maximum value max (1-10). The correction coefficient Fc including the component of the ratio consisting of the sensor output values R1 and R2 from the sensor arranged at the position to be used is defined. The calculation formula of the correction coefficient Fc shown in the formula (13) shows an example in which the inventors set various conditions and conducted experiments to optimize the correction coefficient Fc, and the ratio of R1 and R2 is high. The constant portion other than the component (R2 / R1) may be appropriately changed according to the condition setting.

Then, as shown in the left table of FIG. 12 (a) and FIGS. 12 (b) and 12 (c), the correction coefficient Fc calculated by the above equation (13) (right table of FIG. 10 (a)). Is multiplied only by the sensor output value from the sensor located at the position adjacent to the heel side (one next to the sensor) with respect to the sensor whose sensor output value is the maximum value max (1-10). To execute. In this way, the sensor output is calculated by calculating the position of the center of gravity (or weighted average) using the above equation (11) based on the sensor output value to be calculated above, including the corrected sensor output value. When the position number of the sensor whose value is the maximum value max (1-10) changes, the phenomenon that the lip position changes significantly is suppressed.

Specifically, for example, as shown in the contact state “ST1” of the lip LP in the left table of FIG. 10A and FIG. 10B, the sensor output value becomes the maximum value max (1-10). When the position of the sensor is "PS4", the sensor output value R1 of the sensor 35 arranged at the position PS5 one adjacent to the heel side of the position PS4 and the sensor arranged at the position PS6 two adjacent to the position PS4. When the correction coefficient Fc is calculated using the above equation (13) based on the sensor output value R2 of 36, a numerical value of “0.36” is obtained as shown in the right table of FIG. 10 (a).

Then, the contact state “ST1” of the lip LP in the left table of FIG. 12A and the sensor position PS4 at which the sensor output value becomes the maximum value max (1-10) as shown in FIG. 12B. The sensor output value is corrected by multiplying the sensor output value of the sensor 35 located at the position PS5 adjacent to the heel side by the above correction coefficient Fc (= 0.36) (121). × 0.36 ≒ 43). Based on the sensor output values of each sensor 35 to 40 on the heel side of the position PS4, including the sensor output value of the corrected sensor 35, the center of gravity position (or weighted average) is determined using the above equation (11). When the lip position PS (Right) is calculated, a numerical value of "6.65" is obtained as shown in the right table of FIG. 12 (a).

On the other hand, for example, the contact state “ST2” of the lip LP in the left table of FIG. 10A and the position of the sensor where the sensor output value becomes the maximum value max (1-10) as shown in FIG. 10C. Is changed to "PS5", the sensor output value R1 of the sensor 36 arranged at the position PS6 one adjacent to the heel side of the position PS5, and the sensor 37 arranged at the position PS7 two adjacent to the position PS5. When the correction coefficient Fc is calculated using the above equation (13) based on the sensor output value R2 of FIG. 10 (a), a numerical value of “0.69” is obtained as shown in the right table of FIG. 10 (a).

Then, the contact state “ST2” of the lip LP in the left table of FIG. 12A and the sensor position PS5 at which the sensor output value reaches the maximum value max (1-10) as shown in FIG. 12C. The sensor output value is corrected by multiplying the sensor output value of the sensor 36 located at the position PS6 adjacent to the back side by the above correction coefficient Fc (= 0.69) (103). × 0.69 ≒ 70). Based on the sensor output value of each sensor 36 to 40 on the heel side of the position PS5, including the sensor output value of the corrected sensor 36, the center of gravity position (or weighted average) is determined using the above equation (11). When the lip position PS (Right) is calculated, the numerical value "7.19" is obtained as shown in the right table of FIG. 12 (a).

As described above, in the method of the present embodiment, the lip position PS is calculated even when the position number of the sensor whose sensor output value is the maximum value max (1-10) changes (increases or decreases). It was confirmed that the change in the value of (Right) was suppressed (in the above example, the change from "6.65" to "7.19" to "0.54").

Here, the change in the lip position determined by the method shown in the present embodiment will be described in detail.
FIG. 13 is a diagram showing an example of a sensor output value for which a correction coefficient used for correction processing of a sensor output value applied to the present embodiment is calculated, and an example of calculation of a correction coefficient according to the present embodiment. FIG. 14 is a diagram showing an example of a sensor output value for which the position of the center of gravity for determining the lip position in the present embodiment is calculated, and an example of a change in the lip position in the present embodiment.

The correction coefficient Fc used in the above-mentioned correction processing of the sensor output value is the position of the sensor where the sensor output value is the maximum value max (1-10) (that is, the position where the lip LP is in strong contact with the lead portion 11; It changes according to the contact state of the lip LP) and the sensor output value from the sensors arranged one or two adjacent to the heel side with respect to the position. For example, when the lip position is determined using the sensor output values from the sensors 31 to 40 of the positions PS1 to PS10 shown in the left table of FIG. 7 described above, the correction coefficient Fc for each contact state of the lip LP is calculated. The sensor output value is shown as shown in the left table of FIG. 13, and the correction coefficient Fc calculated by using the above equation (13) based on the calculation target is shown as shown in the right table of FIG. The calculation results shown in the right table of FIG. 13 show the numerical values up to the second decimal place calculated by using the above equation (13). Here, when the calculation result is a positive value, at least the numerical value up to the second decimal place is set as it is in the correction coefficient Fc. On the other hand, when the calculation result is a negative value, "0" is set as the correction coefficient Fc. In addition, when the position of the sensor where the sensor output value becomes the maximum value max (1-10) becomes PS9 and PS10, and the sensor output value to be calculated above cannot be extracted (or the sensor output value does not exist). Is set to "NG" as the correction coefficient Fc.

Then, in the correction process of the sensor output value, as shown in FIG. 13, the correction coefficient set for each sensor position (contact state of the lip LP) at which the sensor output value becomes the maximum value max (1-10). Fc is multiplied by the sensor output value from the sensor arranged one position on the heel side with respect to each position where the sensor output value becomes the maximum value max (1-10). For example, in the uppermost row of the left table in FIG. 13, from the sensor 32 at the position (PS2) one adjacent to the heel side with respect to the sensor position (PS1) at which the sensor output value is the maximum value max (1-10). By multiplying the sensor output value "89" of FIG. 13 by the correction coefficient Fc (= 0.84) shown in the uppermost row of the table on the right side of FIG. 13, the sensor at the position PS2 shown in the uppermost row of the table on the left side of FIG. The output value "89" is corrected to "74" (≈89 × 0.84) as shown in the left table of FIG. Here, when the correction coefficient Fc is “0” and “NG”, the sensor output value after the correction process is set to “0” as shown in the left table of FIG. In the left table of FIG. 14, the sensor output value which is the maximum value among the distribution of the sensor output values from each sensor 31 to 40 is shown by a thick line frame with halftone for convenience, and correction processing is performed. The later sensor output values are shown in a thick line frame.

The sensor output value from each sensor placed on the heel side of the position of the sensor where the sensor output value is the maximum value max (1-10), including the sensor output value corrected in this way, determines the lip position. It is a calculation target of the position of the center of gravity (or weighted average) for determination, and is shown as shown in the left table of FIG. Here, in the correction process applied to the present embodiment, the sensor output value for which the position of the center of gravity (or the weighted average) is calculated has a prominently high value close to the maximum value max (1-10). One of the purposes is to prevent it from being included. Therefore, as shown in the left table of FIG. 14, there are many cases where the corrected sensor output value is lower than the other sensor output values for which the center of gravity position (or weighted average) is calculated (weighted average). That is, in the entire correction process, the correction coefficient Fc is set so that the ratio at which the corrected sensor output value becomes lower than the other sensor output values becomes large). Specifically, by using the calculation formula of the correction coefficient Fc shown in the formula (13), the sensors are arranged one or two next to the sensor whose maximum sensor output value is max (1-10). The larger the value of the ratio of the sensor output values from the sensor, the higher the intensity (degree) of the correction processing for the sensor output value from the sensor placed next to it, and the value of the sensor output value after the correction processing becomes higher. It will be relatively low.

Then, when the lip position PS (Corr) is obtained based on the sensor output value to be calculated including the corrected sensor output value shown in the left table of FIG. 14, as shown in the right table of FIG. Shown. For example, in the uppermost row of the left table of FIG. 14, the sensor 32 is arranged at the position PS2 one adjacent to the heel side with respect to the sensor position (PS1) at which the sensor output value is the maximum value max (1-10). The sensor output value from is subjected to the above-mentioned correction processing and is used as a calculation target of the center of gravity position (or weighted average). Further, the sensor output values from the sensors 33 to 40 arranged at the positions PS3 to PS10 other than the sensor 32 that is the target of the above correction process are used as they are as the calculation target of the center of gravity position (or weighted average). The center of gravity position (or weighted average) is calculated using the above equation (11) based on the sensor output value to be calculated, including the sensor output value of the corrected sensor 32, and the lip position PS (Corr). As shown in the table on the right of FIG. 14, the numerical value of "3.8" is obtained. Here, when the correction coefficient Fc shown in the right table of FIG. 13 is "NG", that is, when the sensor output value for which the correction coefficient Fc is calculated cannot be extracted, the sensor output value is the maximum value max (1). -10) It is determined that the position of the sensor that becomes PS9 or PS10 is located, the center of gravity position (or weighted average) is not calculated, and "10" is set as the lip position PS (Corr). The lip position PS (Corr) determined in this way is shown for each relative position (1 to 26) where the lip LP on the lead substrate 11a contacts, and is shown by a thick solid line in FIG. be. Here, one of the purposes of the correction process applied to the present embodiment is to suppress a sudden change in the lip position as shown by a thin dotted line in FIG. Therefore, as shown in the left table of FIG. 14, the value of the correction coefficient Fc is set small immediately before the sensor having the maximum sensor output value of max (1-10) shifts to the adjacent sensor, and the sensor is set. The intensity (degree) of the correction process with respect to the output value becomes high, and the sensor output value after the correction process becomes relatively small. On the other hand, immediately after the sensor having the maximum sensor output value of max (1-10) is transferred to the adjacent sensor, the value of the correction coefficient Fc is set to a large value, and the strength (degree) of the correction process with respect to the sensor output value is set. Becomes low, and the sensor output value after the correction process becomes relatively large.

As described above, in the present embodiment, the sensor output value from the sensor arranged one or two adjacent to the heel side with respect to the position of the sensor whose sensor output value is the maximum value max (1-10). Adjacent to the sensor with the maximum value max (1-10) (located one next to it) using the correction coefficient calculated based on, and high enough to approximate the maximum value max (1-10). Performs correction processing to suppress the sensor output value that indicates the value. As a result, it is possible to prevent the sensor output value to be calculated for the position of the center of gravity (or weighted average) from including a prominently high value, and as shown in the left table and the right table of FIG. 14, the sensor output. By shifting the sensor whose value is the maximum value max (1-10) to the adjacent sensor, even if the position number changes, correction is performed to suppress the sensor output value before and after the change. Therefore, it is possible to suppress abrupt changes in the lip position PS (Corr) as much as possible.

In particular, in the present embodiment, as shown by the thick solid line in FIG. 9, the performer does not perform tonguing, and the temperature drift due to holding the mouthpiece and the temperature and humidity in the oral cavity Similar to the change tendency under ideal conditions that are not affected (the change tendency of the lip position PS (1-10) shown by the thin solid line in FIG. 9), the contact position of the lip LP is the lead portion 11. It was confirmed that the value of the lip position PS (Corr) tends to increase relatively smoothly as the tip side moves toward the heel. Here, since there is a difference of about 1 to 2.5 between the two lip position PS (1-10) and the change tendency of PS (Corr), the lip position PS determined by the present embodiment ( After performing level adjustment for the numerical value of Corr) so as to approximate the numerical value of the change tendency under the above ideal conditions (lip position PS (1-10)), 7 bits are obtained by the above equation (12). It is converted into a MIDI signal which is a numerical value expressed in 1 and used in the sound source 8.

<Control method for electronic musical instruments>
Next, a control method in an electronic musical instrument to which the lip position determination method according to the present embodiment is applied will be described. Here, the method for controlling an electronic musical instrument according to the present embodiment is realized by executing a control program including a processing program of a specific lip detection unit in the CPU 5 of the electronic musical instrument 100 described above.

FIG. 15 is a flowchart showing a main routine of a control method in an electronic musical instrument according to the present embodiment.
As for the control method of the electronic musical instrument according to the present embodiment, first, when the performer (user) turns on the power of the electronic musical instrument 100, the CPU 5 initializes various settings of the electronic musical instrument 100 as shown in the flowchart shown in FIG. The initialization process is executed (step S1502).

Next, the CPU 5 executes a process based on the detection information of the lip (lower lip) output from the lip detection unit 3 by the performer holding the mouthpiece 10 of the electronic musical instrument 100 (step S1504). The process of the lip detection unit 3 includes the above-mentioned method for determining the lip position, which will be described in detail later.

Next, the CPU 5 executes a process based on the detection information of the tongue TN output from the tongue detection unit 4 according to the contact state of the tongue (tongue portion) TN to the mouthpiece 10 (step S1506). Further, the CPU 5 executes a process based on the breath pressure information output from the breath pressure detection unit 2 according to the breath blown into the mouthpiece 10 (step S1508).

Next, the CPU 5 generates a key code corresponding to the pitch information included in the operation information of the operator 1, supplies the key code to the sound source 8, and executes a key switch process for setting the pitch of the musical tone (step S1510). At this time, the CPU 5 has a musical tone, volume, and sound based on the lip position calculated using the lip LP detection information input from the lip detection unit 3 in the process of the lip detection unit 3 (step S1504). The process of adjusting the height and setting the tone effect (for example, pitch bend, vibrato, etc.) is executed. Further, in the process of the tongue detection unit 4 (step S1506), the CPU 5 executes a process of setting the note on / off of the musical tone based on the tongue TN detection information input from the tongue detection unit 4, and breath pressure. In the process of the detection unit 2 (step S1508), a process of setting the volume of the musical tone is executed based on the breath pressure information input from the breath pressure detection unit 2. Through these series of processes, the CPU 5 generates an instruction for generating a musical tone according to the performance operation of the performer and outputs the instruction to the sound source 8. Then, the sound source 8 executes a pronunciation process for operating the sound system 9 based on a musical tone generation instruction from the CPU 5 (step S1512).

After that, the CPU 5 executes other necessary processing (step S1514), and when the series of processing operations is completed, the processing of steps S1504 to S1514 described above is repeatedly executed again. Although not shown in the flowchart shown in FIG. 15, the CPU 5 detects a change in the state in which the performance ends or is interrupted during the execution of the series of processing operations (steps S1502 to S1514) described above. If so, the processing operation is forcibly terminated.

(Processing of lip detector)
Next, the processing of the lip detection unit 3 shown in the above-mentioned main routine will be described.
FIG. 16 is a flowchart showing the processing of the lip detection unit applied to the control method of the electronic musical instrument according to the present embodiment.

The processing of the lip detection unit 3 applied to the control method of the electronic musical instrument shown in FIG. 15 is, as shown in the flowchart of FIG. 16, first, the CPU 5 is a plurality of sensors 20, 30 to arranged in the lead unit 11. The sensor output value output from 40 is acquired and stored as the current output value in a predetermined storage area of the RAM 7. As a result, the sensor output value stored in the predetermined storage area of the RAM 7 is sequentially updated to the current sensor output value (step S1602).

Next, the CPU 5 determines whether or not the performer is currently holding the mouthpiece 10 based on the sensor output value (current output value) output from the sensors 30 to 40 of the lip detection unit 3 (step). S1604). Here, as a method for determining whether or not the mouthpiece 10 is held, for example, the determination is made based on the sum of the sensor output values of 10 sensors 31 to 40 (or 11 sensors 30 to 40). The technique can be applied. That is, when the sum of the calculated sensor output values exceeds a predetermined threshold (for example, 800), it is determined that the mouthpiece 10 is held, and when the sum is equal to or less than the above threshold, the mouthpiece is held. It is judged that the 10 is not held.

The determination as to whether or not the mouthpiece 10 is held is not limited to the above method, and other methods may be applied. For example, when the sensor output values of 10 sensors 31 to 40 (or 11 sensors 30 to 40) are all equal to or less than a predetermined value, it is determined that the mouthpiece 10 is not held and the sensors 31 to 40 are not held. When the sensor output value of more than half of them exceeds the above-mentioned predetermined value, the method of determining that the mouthpiece 10 is being held may be applied.

If it is determined in step S1604 that the performer is not holding the mouthpiece 10 (No in step S1604), the CPU 5 calculates the lip position (denoted as "pos" in FIG. 16). Instead, after setting "64", which is the default value of the 7-bit expression ("pos = 64"; step S1606), the processing of the lip detection unit 3 is terminated, and the process returns to the processing of the main routine shown in FIG. ..

On the other hand, when it is determined in step S1604 that the performer is holding the mouthpiece 10 (Yes in step S1604), the CPU 5 performs a series of processing operations based on the method for determining the lip position described above. Execute.

Specifically, the CPU 5 first extracts the sensor output value having the maximum value max (1-10) from the sensor output values from the sensors 31 to 40 of the lip detection unit 3 (step S1608), and at the same position. The sensor output value from the sensor arranged on the back side (heel side) of the mouthpiece 10 is extracted as a calculation target when determining the lip position described later. The position of the sensor whose extracted sensor output value is the maximum value max (1-10) and the sensor output value to be calculated are stored in a predetermined storage area of the RAM 7.

Next, the CPU 5 determines whether or not the performer is holding the position of the innermost side (heel side) of the mouthpiece 10 based on the sensor output value which is the extracted maximum value max (1-10). (Step S1610). Here, is the position of the sensor where the sensor output value is the maximum value max (1-10) the position PS10 of the sensor 40 arranged on the innermost side of the mouthpiece 10 (the most heel side of the lead portion 11)? Judge whether or not.

In step S1610 above, when it is determined that the performer is holding the position PS10 on the innermost side (heel side) of the mouthpiece 10 (Yes in step S1610), the CPU 5 is in the lip position (pos). Is not calculated, and after setting the 7-bit representation numerical value “127” indicating the position PS10 on the heel side of the lead portion 11 (“pos = 127”; step S1612), the processing of the lip detection unit 3 is terminated. Then, the process returns to the processing of the main routine shown in FIG.

On the other hand, in the above step S1610, when it is determined that the position PS10 on the innermost side (heel side) of the mouthpiece 10 is not held (No in step S1610), the CPU 5 determines the lip position. The correction coefficient for correcting the sensor output value to be calculated in (step S1614) is calculated. That is, the CPU 5 is adjacent to and 2 on the heel side with respect to the position of the sensor in which the sensor output value is the maximum value max (1-10) in the distribution of the sensor output values from each sensor 31 to 40. The correction coefficient Fc is calculated based on the above-mentioned equation (13) including the component of the ratio consisting of the sensor output values R1 and R2 from the sensors arranged next to each other.

Next, the CPU 5 determines whether or not the calculated correction coefficient Fc is less than "0" (step S1616). If the calculated correction factor Fc is less than "0" (Yes in step S1616), that is, if it is a negative value, the CPU 5 sets the correction factor Fc to "0" (step S1618). , The next step S1620 is executed. On the other hand, when the calculated correction coefficient Fc is not less than "0", that is, when it is "0" or a positive value (No in step S1616), the CPU 5 uses the calculated value as it is as the correction coefficient Fc. Is set to, and the next step S1620 is executed. Here, the position of the sensor whose sensor output value is the maximum value max (1-10) is PS9, and the two sensor output values R1 and R2 which are the targets when calculating the above correction coefficient Fc cannot be extracted. (Or, if the sensor output value does not exist), the CPU 5 sets the correction coefficient Fc to "NG".

Next, the CPU 5 corrects the sensor output value using the above correction coefficient Fc, and then calculates the lip position PS (Corr) (step S1620). That is, the CPU 5 first places the correction coefficient Fc set in steps S1614 to S1618 adjacent to the heel side (next to one) with respect to the position where the sensor output value becomes the maximum value max (1-10). Performs a correction process that multiplies the sensor output value from the placed sensor. Here, when the correction coefficient Fc is "0" and when it is set to "NG", the sensor output value after the correction process is set to "0".

After that, the CPU 5 calculates the center of gravity position (or weighted average) using the above equation (11) based on the sensor output value to be calculated described above, including the corrected sensor output value, and the lip position. PS (Corr) is determined (step S1620). Here, when the correction coefficient Fc is set to "NG", the CPU 5 determines that the position of the sensor at which the sensor output value is the maximum value max (1-10) is PS9, and described above. The center of gravity position (or weighted average) is not calculated using the equation (11), and the lip position PS (Corr) is set to "10" (corresponding to "127" in the numerical value of 7-bit expression). After storing the determined lip position PS (Corr) in a predetermined storage area of the RAM 7, the CPU 5 ends the processing of the lip detection unit 3 and returns to the processing of the main routine shown in FIG.

As described above, in the present embodiment, the maximum value is based on the distribution of the sensor output values obtained from the plurality of sensors 31 to 40 arranged in the lead portion 11 while holding the mouthpiece 10 of the electronic musical instrument 100. Extract the sensor output value on the back side (heel side) from the sensor position of the sensor output value that is max (1-10). Then, among the extracted sensor output values, the sensor output value from the sensor at the position adjacent to the sensor whose sensor output value is the maximum value max (1-10) is multiplied by a predetermined correction coefficient Fc. Perform correction processing. Here, the correction coefficient Fc applied to the correction process is from the sensors arranged one or two next to the heel side with respect to the position of the sensor whose sensor output value is the maximum value max (1-10). It is calculated based on the calculation formula including the component (R2 / R1) of the ratio of the sensor output values R1 and R2 of. Then, the lip position PS (Corr) is calculated by calculating the center of gravity position (or weighted average) by a predetermined calculation formula using only the above-extracted sensor output value including the corrected sensor output value as a calculation target. ) Is determined.

As a result, the sensor output value used as the calculation target in the position of the center of gravity (or weighted average) for determining the lip position PS (Corr) has a prominently high value (that is, the sensor output value that becomes the maximum value, and the sensor output value). It can be corrected so that the sensor output value indicating the next highest value next to the maximum value or a high value close to the maximum value) is not included. Therefore, even if the position of the lip LP in contact with the lead portion 11 moves and the position number of the sensor whose sensor output value reaches the maximum value max (1-10) changes, it protrudes before and after the change. Since it is possible to suppress the sensor output value indicating the value to be performed, it is possible to realize a relatively smooth change tendency in which a sudden change in the lip position PS (Corr) is suppressed.

Therefore, when playing while holding the mouthpiece 10 of the electronic musical instrument 100, it is more accurate without being affected by temperature drift of the sensor output value, tonguing, variation due to temperature and humidity in the oral cavity, and mixing of noise. It is possible to determine an appropriate lip position with, and it is possible to bring it closer to the effect of brass band and musical sound (for example, pitch bend, vibrato, etc.) in an acoustic wind instrument.

That is, according to the present embodiment, when the operation position (lip position) associated with the contact of a part of the body is determined by the calculation based on the output values and the arrangement positions of the plurality of sensors, the outputs of the plurality of sensors are determined. Based on the distribution of values, sensors suitable for use in the calculation are excluded (excluded from the calculation target) from among multiple sensors that are not suitable for the calculation for obtaining the operation position. Only can be properly selected (as a calculation target).

Further, prior to the above calculation, the output values of the sensors used in the calculation for obtaining the operation position are corrected based on the distribution of the output values of the plurality of selected sensors, so that the distribution of the output values of the plurality of sensors is corrected. Even if the entire sensor selected in response to the change in the sensor, it is possible to avoid a sudden change in the operation position obtained by the calculation.

In addition, it is an operation to obtain the average position based on the distribution of the arrangement positions of a plurality of selected sensors, and when obtaining the average position, a weight is applied by multiplying the position of each sensor by the output value of each sensor as a weight value. The above operation position is determined by calculation by averaging, and the output value of each sensor, which is the weight value when obtaining this weighted average, is corrected based on the distribution of the output values of a plurality of sensors, so that the operation position is more accurate. It is possible to stably determine an appropriate position with.

In addition, it predicts that the selected sensor will change according to the change in the distribution of the output values of multiple sensors (predicts how close the selected sensor is to the change timing), and based on this prediction. Since the output value of the sensor used for the calculation is corrected, it is possible to avoid a sudden change in the determined operation position before and after the selected sensor changes.

In addition, since the sensor used for the above calculation is selected based on the position of the sensor (specified sensor) having the maximum output value among the plurality of sensors, the operation position can be obtained more accurately and appropriately. Only the sensors that are suitable for use can be properly selected based on the distribution of the output values of multiple sensors, and the other sensors that are not suitable for calculation can be appropriately excluded. .. Further, in this case, the output values of the sensors arranged at the positions closest to the sensor having the maximum output value among the plurality of sensors used for the calculation are corrected (corrected so as to be smaller), so that the calculation can be performed. Among the multiple sensors used, there is a high possibility that the selection status will change (the position number of the sensor that maximizes the sensor output value will change), and because the output value is large, the calculation result will correspond to the change in the selection status. It is possible to eliminate or suppress the adverse effect on the calculation result by the sensor having a large influence on.

In the above-described embodiment, when the sensor output value is corrected using the correction coefficient Fc, the sensor output value is adjacent to the heel side with respect to the sensor having the maximum value max (1-10) (one). Although the method of multiplying the sensor output value from the sensor at the (adjacent) position and correcting by multiplying by a predetermined correction coefficient has been described, the present invention is not limited to this. That is, the purpose of correcting the sensor output value is to suppress the sensor output value showing a high value close to the maximum value max (1-10) and suppress a sudden change in the lip position. Therefore, the sensor output values from the plurality of sensors arranged in the lead portion 11 are the next highest value after the maximum value max (1-10), or a high value close to the maximum value max (1-10). If the correction process is executed for the sensor indicating, the target of the correction process is not necessarily the position adjacent (one next to) to the sensor whose maximum sensor output value is max (1-10). It does not have to be the sensor output value from the sensor of. Here, in order to eliminate or suppress the influence of the acquired sensor output value variation and noise contamination, the maximum value is max (1-10) when the sensor output value variation and noise contamination rate are low. The sensor output value from the sensor at a position one or more away from the sensor (for example, two adjacent or three adjacent) may be the target of the correction process. In this case, it shows the next highest value after the maximum value max (1-10) and includes the component of the ratio of the sensor output value to be corrected and the sensor output value showing the next highest value. The correction coefficient is calculated using the same calculation formula as the formula (13). Specifically, as an example, the sensor output value from the sensor two adjacent to the heel side is next to the maximum value max (1-10) with respect to the sensor whose sensor output value is the maximum value max (1-10). If the sensor output value from the sensor adjacent to the sensor is the next highest value, the correction coefficient is the component of the ratio of the sensor output values R2 and R3 of the adjacent sensors ( It is calculated based on the calculation formula including R3 / R2), and the correction process is executed for the sensor output value R2 using the calculated correction coefficient. As another example, the sensor output value from the sensor three adjacent to the sensor whose sensor output value is the maximum value max (1-10) is the next highest value after the maximum value max (1-10). If the sensor output value from the adjacent sensor is the next highest value, the correction coefficient is a component of the ratio of the sensor output values R3 and R1 of the non-adjacent sensors (R1 / R3). Is calculated based on the calculation formula including the above, and the correction process is executed for the sensor output value R3 using the calculated correction coefficient.

Further, in the above-described embodiment, the position of the sensor having the maximum value max (1-10) is extracted based on the distribution of the sensor output values from the plurality of sensors 31 to 40 arranged in the lead portion 11. , The sensor output value from each sensor arranged on the back side (heel side) of the mouthpiece 10 from the relevant position is set as the calculation target of the center of gravity position, and is adjacent to the sensor having the maximum value max (1-10) (1). The method of correcting the sensor output value from the sensor at the position (next to the next), which is the next highest value after the maximum value max (1-10), has been described, but the present invention has been described. It is not limited to this. That is, in the calculation of the position of the center of gravity for determining the lip position, it is sufficient that the adverse effect of the sensor output value indicating the maximum value max (1-10) or a high value close to it can be eliminated or suppressed. Therefore, the sensor output value from each sensor arranged on the back side (heel side) of the mouthpiece 10, including the sensor output value from the sensor having the maximum value max (1-10), is used as the calculation target of the center of gravity position. , The correction process may be executed for the sensor output value having the maximum value max (1-10).

Further, in the present embodiment, the position of the sensor having the maximum value max (1-10) is extracted based on the distribution of the sensor output values from the plurality of sensors 31 to 40 arranged in the lead portion 11. A method of calculating the position of the center of gravity based on the sensor output value from each sensor arranged on the back side (heel side) of the mouse piece 10 with respect to the position has been described, but the present invention is limited to this. It's not something. That is, the sensor output value from each sensor arranged on the air inlet side (tip side) of the mouthpiece 10 is used as the calculation target of the center of gravity position with reference to the position of the sensor having the maximum value max (1-10). It may be something to do.

Further, in the present embodiment, as a method of calculating the correction coefficient Fc, sensors from sensors arranged one or two adjacent to the sensor having the maximum sensor output value of max (1-10). A calculation formula including a component of the ratio of the output value (R2 / R1) or the ratio of the sensor output value (for example, R3 / R2, etc.) including the output value having the next highest value after the maximum value max (1-10). Although the method to be used has been described, the present invention is not limited thereto. For example, the correction coefficient may be calculated using a calculation formula including a difference (R1-R2) between a plurality of sensor output values from the sensors arranged one next to and two next to each other.

Further, in the above-described embodiment, in the process of the lip detection unit shown in the flowchart of FIG. 16, the sensor arranged on the innermost side (heel side) of the lead unit 11 after updating the sensor output value in step S1602. Even if the temperature state of the lead portion 11 is determined based on the sensor output value output from 40 and the influence of the temperature on the sensor output values from the sensors 20, 30 to 40 is offset. good. As described above, in the capacitive touch sensor, a temperature drift in which the detected value fluctuates due to the influence of temperature and humidity is known. Therefore, it is transmitted from the human body by performing a process of subtracting a predetermined value (for example, about "100" at the maximum) corresponding to the temperature drift from all the sensor output values from the sensor output values of each sensor 20, 30 to 40. It is possible to eliminate the influence of temperature drift caused by an increase in body temperature, temperature in the oral cavity, and humidity.

Further, in the above-described embodiment, the electronic musical instrument 100 having a saxophone-type appearance has been shown and described, but the electronic musical instrument according to the present invention is not limited thereto. That is, if it is an electronic musical instrument (electronic wind instrument) that the performer holds in his mouth and expresses the same performance as an acoustic wind instrument using a lead, it is applied to an electronic musical instrument that imitates another acoustic wind instrument such as a clarinet. You may.

Further, in recent electronic wind instruments, in addition to operating a plurality of operating controls for playing with a plurality of fingers, for example, a touch sensor is provided at the position of the thumb, and the position of the thumb detected by the touch sensor is adjusted. There is also one that controls the effect of the musical sound that is generated. By applying the detection device and the detection method for detecting the operation position according to the present invention to such an electronic wind instrument, a plurality of sensors for detecting finger contact or proximity are arranged at a position that can be operated with one finger. The operation position by one finger may be detected based on the plurality of detected values detected by the plurality of sensors.

Further, not only in electronic musical instruments, but also in electronic devices in which an operator operates using a part of the body, the detection device and the detection method for detecting the operation position according to the present invention are applied to the body. A plurality of sensors for detecting contact or proximity of a part of the body are provided at a position where a part of the body can be operated, and the operation position by the part of the body is detected based on a plurality of detection values detected by the plurality of sensors. You may try to do it.

Although some embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, but includes the inventions described in the claims and the equivalent scope thereof.
The inventions described in the original claims of the present application are described below.

(Additional note)
[1]
With multiple sensors arranged in a specific direction,
A calculation based on the output values of some of the sensors and the arrangement position of some of the sensors while selecting some of the sensors based on the distribution of the output values of the plurality of sensors. A control unit for determining an operation position in the specific direction is provided.
The control unit
A detection device characterized in that, prior to the calculation, the output value of the part of the sensor is corrected based on the distribution of the output value of the part of the sensor.

[2]
The calculation is an operation for obtaining an average position based on the distribution of the arrangement positions of some of the sensors, and when obtaining the average position, the output value of each sensor is multiplied as a weight value for the position of each sensor. The detection device according to [1], wherein the calculation is based on a weighted average.

[3]
The control unit
With reference to the sensor specified based on the distribution of the output values of the plurality of sensors, the sensor arranged on any one side in the specific direction is selected as a part of the sensor. The detection device according to [1] or [2].

[4]
The control unit
Based on the distribution of the output values of the plurality of sensors, the sensor having the maximum output value is specified, and the sensors arranged on either side of the specific direction with the specified sensor as a reference are used. The detection device according to [3], wherein the sensor is selected as a part of the sensor.

[5]
The control unit
It is characterized in that the correction is performed so that the ratio of the value to the output value of the specified sensor to be lower than any of the other output values of the part of the sensor is larger [3] or. [4] The detection device according to 4.

[6]
The control unit
Of the some sensors, at least the output value of the specified sensor or the sensor arranged at the position closest to the specified sensor is set to the output value of two adjacent sensors of the some sensors. The detection device according to any one of [3] to [5], wherein the correction is made based on the ratio or difference of the output values.

[7]
Among the above-mentioned some sensors, at least the output value of the specified sensor or the sensor having the next highest output value after the output value of the specified sensor is placed next to the output value of the specified sensor. The detection device according to any one of [3] to [5], wherein the correction is made based on the ratio or difference of the output values of two sensors including the sensor having a high output value.

[8]
The control unit
The detection device according to [6] or [7], wherein the larger the value of the ratio of the output values of the two sensors is, the higher the strength of the correction is set with respect to the output value of the sensor.

[9]
The control unit
It is characterized in that the output values of some of the sensors used in the calculation are corrected by a predetermined calculation relating to the prediction of changes in the selection of some of the sensors according to the change in the distribution of the output values of the plurality of sensors. The detection device according to any one of [1] to [8].

[10]
Equipped with a mouthpiece that the performer can hold in his mouth
The plurality of sensors are arranged from one end side to the other end side of the lead portion of the mouthpiece, and each of them detects the contact state of the lips.
The control unit
Any of [1] to [9], wherein the partial sensor selected from the plurality of sensors is corrected for the output value of the sensor and the calculation for determining the operation position is performed. The detection device described in Crab.

[11]
The detection device according to any one of claims 1 to 10.
Equipped with a sound source that produces musical tones,
The plurality of sensors detect a part of the performer's body and
The control unit
An electronic musical instrument characterized in that the musical sound generated in the sound source is controlled based on the determined operation position.

[12]
The electronic musical instrument is an electronic wind instrument having a mouthpiece.
The electronic musical instrument according to [11], wherein the plurality of sensors are arranged on the lead portion of the mouthpiece to detect the contact position of the performer's lips.

[13]
Electronic devices
Obtain the output values of multiple sensors arranged in a specific direction, respectively,
Select some of the sensors, and select one of them.
The output values of some of the sensors are corrected based on the distribution of the output values of some of the sensors.
The operation position in the specific direction is determined by an operation based on the output value of the part of the sensor including the corrected output value and the arrangement position of the part of the sensor.
A detection method characterized by that.

[14]
On the computer
Get the output values of multiple sensors arranged in a specific direction, respectively,
Select some of the plurality of sensors and select them.
The output values of some of the sensors are corrected based on the distribution of the output values of some of the sensors.
An operation position in the specific direction is determined by an operation based on the output value of the part of the sensor including the corrected output value and the arrangement position of the part of the sensor.
A control program characterized by that.

3 Lip detection unit 4 Ton detection unit 5 CPU (control unit)
8 Sound source 10 Mouthpiece 11 Lead part 11a Lead board 20, 30-40 Sensor 100 Electronic musical instrument LP lip (lower lip)
TN tongue (tongue)
Fc correction coefficient PS _TN , PS0 to PS10 Sensor position PS (Corr) Lip position

Claims (9)

With multiple sensors arranged in a specific direction,
Based on the distribution of the output values of the plurality of sensors, some of the sensors arranged on one side of the sensor having the maximum output value among the plurality of sensors are selected, and some of the sensors are selected. A control unit that determines the operation position in the specific direction by an operation for obtaining a weighted average of the arrangement positions of some of the sensors is provided with the output value of the above as a weight value .
The control unit
Prior to the calculation, the output value of the sensor close to the sensor having the maximum output value among the some sensors is set to a smaller output value based on the distribution of the output values of the part of the sensors. A detection device characterized by correcting so as to be. The control unit
Among the some sensors, at least the output value of the sensor having the maximum output value or the sensor arranged at the position closest to the sensor having the maximum output value is set to the output value of the some sensors. The detection device according to claim 1, wherein the detection device is corrected so as to have a smaller output value based on the ratio or difference of the output values of two adjacent sensors . The control unit
Among the some sensors, at least the output value of the sensor having the maximum output value or the sensor having the next highest output value after the output value of the sensor having the maximum output value is the maximum value. The detection according to claim 1 or 2, wherein the detection is corrected so as to have a smaller output value based on the ratio or difference of the output values of the two sensors including the sensor having the next highest output value. Device. The control unit
The detection device according to claim 2 or 3, wherein the larger the value of the ratio of the output values of the two sensors is, the higher the strength of the correction is set with respect to the output value of the sensor . Equipped with a mouthpiece that the performer can hold in his mouth
The plurality of sensors are arranged from one end side to the other end side of the lead portion of the mouthpiece, and each of them detects the contact state of the lips.
The control unit
1 . The detector described. The detection device according to any one of claims 1 to 5.
Equipped with a sound source that produces musical tones,
The plurality of sensors detect a part of the performer's body and
The control unit
An electronic musical instrument characterized in that the musical sound generated in the sound source is controlled based on the determined operation position. The electronic musical instrument is an electronic wind instrument having a mouthpiece.
The electronic musical instrument according to claim 6, wherein the plurality of sensors are arranged on the lead portion of the mouthpiece to detect the contact position of the performer's lips. Electronic devices
Obtain the output values of multiple sensors arranged in a specific direction, respectively,
Based on the distribution of the output values of the plurality of sensors, some of the sensors arranged on one side of the sensor having the maximum output value among the plurality of sensors are selected.
Among the some sensors, the output value of the sensor close to the sensor having the maximum output value is corrected so as to have a smaller output value based on the distribution of the output values of the some sensors. ,
The operation position in the specific direction is determined by an operation for obtaining a weighted average of the arrangement positions of the partial sensors with the output values of the partial sensors including the corrected output values as weight values.
A detection method characterized by that. On the computer
Get the output values of multiple sensors arranged in a specific direction, respectively,
Based on the distribution of the output values of the plurality of sensors, some of the sensors arranged on one side of the sensor having the maximum output value among the plurality of sensors are selected.
Among the some sensors, the output value of the sensor close to the sensor having the maximum output value is corrected so as to have a smaller output value based on the distribution of the output values of the some sensors. ,
Using the output values of some of the sensors including the corrected output values as weight values, the operation position in the specific direction is determined by an operation for obtaining a weighted average of the arrangement positions of the some sensors.
A control program characterized by that.

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