JP2853451B2 - Motion detection device and tone control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion detection device and a tone control device which detect the bending and stretching motion of a joint such as an elbow or a wrist using an angular velocity detecting means.

[0002]

2. Description of the Related Art As is well known, a technique has been developed in which a sensor for detecting the movement of the body is attached to a joint or the like of each part of a limb, and a tone or the like is controlled in accordance with a detection signal output from the sensor. Such a technology is disclosed in, for example,
04098 and JP-A-2-50194. In the motion detection device and the musical sound control device disclosed in these publications, a detection unit formed by rotatably connecting two members is attached to a joint, and the two detection units change according to the bending of the joint. The bending angle of the joint is obtained by directly detecting the angle of the member, and the musical tone is controlled in accordance with the bending angle.

[0003]

In the above-described conventional motion detection device and tone control device, the detection unit is strictly positioned with respect to the joint in order to obtain a detection signal that accurately corresponds to the bending angle of the joint. Must.
For this reason, there has been a problem that it takes time and effort to mount the device and lacks convenience. Further, in order to ensure the reproducibility of the detection signal obtained from the device, after positioning with respect to the joint, it must be firmly fixed so as not to deviate from the mounting position during operation. For this reason, there is a problem that an unpleasant wearing feeling such as hindrance of the rotation of the joint is accompanied.

[0004] The present invention has been made under such a background, and an object of the present invention is to provide a motion detection device and a tone control device which are easy to mount and do not cause an unpleasant wearing feeling.

[0005]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 is mounted on a joint of a limb,
In an operation detection device that detects a bending angle of the joint,
First and second angular velocity detecting means provided on one limb side and the other limb side continuous with the joint, for detecting angular velocities associated with the bending and stretching operation of the joint, and the first angular velocity detecting means Outputs the first angular velocity information, and the second angular velocity information
And calculating means for calculating a bending angle of the joint based on the second angular velocity information output by the angular velocity detecting means. According to a second aspect of the present invention, there is provided an angular velocity detecting means mounted on a limb and detecting an angular velocity of a part of the mounted limb, and the angular velocity detecting means being mounted on the basis of the angular velocity detected by the angular velocity detecting means. Operation detection means for detecting the start and end of operation of the part, and output from the angular velocity detection means during the period from the start of operation to the end of operation of the part to which the angular velocity detection means detected by the operation detection means is attached. Calculating means for integrating the angular velocity to be performed, and when an integrated value of the calculating means is a predetermined value or more,
Control means for instructing the start of musical tone generation.

[0006]

According to the first aspect of the present invention, the first and the second are provided.
The angular velocity detecting means detects the angular velocity according to the bending / extending operation of the joint of the limb, and the arithmetic means outputs the first angular velocity information output from the first angular velocity detecting means and the second angular velocity detecting means outputs The bending angle of the joint is calculated based on the second angular velocity information. Thereby, the bending angle of the joint is detected from the angular velocity information at two places sandwiching the joint. According to the second aspect of the invention, the angular velocity detecting means detects the angular velocity of the part of the limb to which the limb is attached, and the operation detecting means starts and operates the part of the limb based on the angular velocity. When the end is detected,
The angular velocity output from the angular velocity detecting means is integrated between the start of the operation and the end of the operation. When the integrated value of the arithmetic means is equal to or greater than a predetermined value, the control means instructs the start of tone generation. This instructs the start of tone generation in accordance with the magnitude of the swing in the motion of the limb part.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the structure of a motion detection device according to one embodiment of the present invention. In this figure, a
Is a mounting tool to which a pair of gyros b1 and b2 are attached, and is made of a stretchable material such as a supporter. The player attaches the wearing tool a to the elbow joint (in this figure,
The gyro b1 is attached to the forearm (arm from the elbow joint to the wrist) by attaching the gyro b1 to the right elbow as an example.
2 is placed on the upper arm (arm on the shoulder side from the elbow joint). When the player wears the wearing device a, the gyro b
Reference numerals 1 and b2 are attached to the attachment a so that the detection axes O1 and O2 are parallel to the rotation axis C of the elbow joint.

The gyros b1 and b2 are constituted by vibrating gyros or the like, and generate rotational angular velocities around the detection axes O1 and O2. The angular velocity meter b1 detects an angular velocity according to the rotation of the forearm part accompanying the bending operation of the elbow joint. On the other hand, the angular velocity meter b2
Detects the angular velocity of the upper arm relative to the position of the elbow joint due to the rotation about the shoulder. The detection signals output from the angular velocity meters b1 and b2 are transmitted to a signal processing unit such as a tone control device (described later) connected via the cable c.
Also, in this figure, the motion detection device attached to the right elbow is shown, but in the case of the motion detection device attached to the left elbow, the same as the case of the right elbow except that it is compatible with the left elbow Configuration.

Next, with reference to FIG. 2, the principle of measurement of the elbow bending angle when this motion detecting device is used will be described. In the figure, the gyros b1 and b2 both have a positive or negative output value depending on the rotation direction given to the detection axes O1 and O2. For example, as shown in FIG. The clockwise rotation is set to be positive (+), and the counterclockwise rotation is set to be negative (-). Therefore, in this case, as shown in FIG.
The direction L1 for bending the elbow becomes negative, and the direction R1 for extending the elbow becomes positive. On the other hand, in the gyro b2, the elbow bending direction R2 is positive and the elbow extending direction L2 is negative.

Here, when the measurement of the angular velocity is started from a state where the elbow is straightened, the elbow bending angle θ after t seconds is given by the following equations (1) to (3). That is, assuming that the outputs of the gyros b1 and b2 are V ₁ and V ₂ respectively, the bending amount θ ₁ of the forearm after t seconds is

(Equation 1) And the amount of bending θ ₂ of the upper arm after t seconds
Is

(Equation 2) Given by Using the calculation results of the above equations (1) and (2), the bending angle θ of the elbow after t seconds is

(Equation 3) Will be given by Thus, the angular velocity meter b
The current elbow bending angle θ can be calculated based on the angular velocities V ₁ and V ₂ obtained at any time from 1 and b2.

(1) First Embodiment Next, a first embodiment to which a motion detection device based on the above-described measurement principle is applied will be described. First, FIG. 3 shows an external configuration of the tone control device according to the first embodiment. In the figure, 1R is the motion detection device for the right elbow shown in FIG. 1L is a device in which this motion detection device is configured for the left elbow, and includes an gyro b3 for detecting the angular speed of the forearm and an gyro b4 for detecting the angular speed of the upper arm.
Hereinafter, for the sake of simplicity, these motion detection devices 1R and 1L will be referred to as elbows 1R and 1L. These elbows 1
R and 1L are each connected via a cable c to a tone control device MC attached to the player's waist belt BL, and output a signal whose level changes in accordance with the detected angular velocity to the control device MC. I do.

The tone control device MC calculates the bending angles of the left and right elbows from the outputs of the elbows 1R and 1L based on the above-described measurement principle. Further, three states are assigned to the bending angles of the left and right elbows thus obtained. That is, as shown in FIG. 5, the elbow was completely stretched state from the angle theta ₁ range of the elbow bend angle state, the range of angle theta ₁ angle theta ₂ and state, further, the angle theta ₂ State is the range up to the state where the elbow is completely bent.

As shown in FIG. 6, note names "C" to "B" are assigned to the combinations of the states of the bending angles of the left and right elbows, respectively. Is specified. For example, when the bending angle of the right elbow is the state and the bending angle of the left elbow is the state, the note name specified at the time of sound generation is “G”.

Returning to FIG. 3, the external configuration will be described again. In the figure, reference numeral 2R denotes a grip-type manipulator that is gripped and operated by the right hand, and provided with pressure sensors SR1 to SR8 that are pressed by each finger. These pressure sensors SR1 to SR8 are connected to the musical tone control device MC via a cable c, and output an operation signal whose level changes according to the pressing operation to the musical tone control device MC.

By pressing the pressure sensors SR1 to SR8, a key-on is instructed to the tone control device MC. Also, an octave or a derived sound is specified in accordance with the pressing operation, and thereby the pitch at the time of sound generation is offset-controlled. Here, each of the pressure sensors SR1 to SR8
FIG. 7 shows a pitch offset mode corresponding to. In the figure, first, regarding the designation of the derived sound, the pressure sensor SR
When the pressure operation is performed on any of the pressure sensors SR5 to SR8, the display becomes flat. For the octave designation, the pressure sensor S
When R1 and SR5 are operated, the octave is increased by two octaves. When the pressure sensors SR2 and SR6 are operated, the octave is increased by one octave. When the pressure sensors SR3 and SR7 are operated, ± 0 octave is increased.
When the SR8 is operated, it is down one octave. When the offset amounts corresponding to the pressure sensors SR1 to SR8 are represented by MIDI note numbers, FIG.
It becomes as shown in. In the figure, for example, since the pitch offset amount corresponding to the pressure sensor SR3 is zero, the corresponding MIDI note number is the standard “60”. Other pressure sensors are as illustrated.

Next, with reference to a block diagram shown in FIG. 4, the configuration of the tone control device MC according to this embodiment will be described. In FIG. 1, reference numeral 1 denotes a CPU that controls each unit of the device connected via the bus 10, and its operation will be described later. Reference numeral 2 denotes a ROM that stores various control programs loaded by the CPU 1, and reference numeral 3 denotes a RAM that is used as a work area of the CPU 1 and stores various register values and the like.

4R and 4L are elbows 1R and 1L, respectively.
(See FIG. 3). The detector converts signals supplied from the elbows 1R and 1L connected thereto into angular velocity data, and outputs the angular velocity data to the bus 10. Reference numeral 5R denotes a detector connected to the grip-type manipulator 2R (see FIG. 3), which converts operation signals supplied from the pressure sensors SR1 to SR8 of the manipulator 2R into pressure data, and converts this into bus data.
Output to 0. Various control modes corresponding to the pressing operations of the pressure sensors SR1 to SR8 are as described above.

Reference numeral 6 denotes a panel switch provided with a switch group for performing various settings such as a tone color designation switch.
Generates a switch signal according to the setting operation. Further, the panel switch 6 is provided with button switches RST and LST for setting initial values of the bending angles of the left and right elbows.
When the player presses the button switch RST while the right elbow is straightened before the performance starts, the initial value of the bending angle of the right elbow “180 °” is stored in the RAM 3. On the other hand, when the button switch LST is pressed with the left elbow extended straight, the initial value of the bending angle of the left elbow is “180”.
゜ ”is stored in the RAM 3.

Reference numeral 7 denotes a display comprising an LCD panel or the like, and displays various setting states by the panel switch 6. Reference numeral 8 denotes a well-known sound source configured by a waveform memory reading method, and generates a tone signal according to tone control data supplied from the CPU 1. Reference numeral 9 denotes a sound system, which performs sound effect processing and the like on a tone signal supplied from the sound source 8, amplifies the tone signal, and causes the speaker SP to generate sound.

Next, the operation of the tone control device MC having the above configuration will be described with reference to the flowcharts shown in FIGS. Here, the operation is divided into cases corresponding to the actual operation, and the description will be sequentially advanced.

A: Operation before occurrence of note-on event First, when the power of the tone control device MC is turned on, C
PU1 loads the control program stored in ROM2. Thereby, the main routine shown in FIG. 9 is started, and the CPU 1 advances the process to step Sa1. In step Sa1, initialization such as resetting various register values is performed. Then, in step Sa2, the switch group of the panel switch 6 is scanned, and a register value corresponding to the setting state of each switch is set.

Next, at step Sa3, the CPU 1
Determines whether the count value of the clock supplied from the timer (not shown) has reached a predetermined value, that is, whether a predetermined time has elapsed. Here, if the count value has not reached the predetermined value, the determination result here is “No”, and the process returns to step Sa2 to repeat the above operation. On the other hand, when the count value of the clock reaches the predetermined value, that is, every time a fixed time elapses, the determination result of step Sa3 becomes “Ye
s ", and proceeds to step Sa4. In step Sa4, the grip processing routine shown in FIG. 10 is called.

When the grip processing routine is started, the CPU 1 first proceeds to step Sb1 (see FIG. 10). In step Sb1, the pressure data generated by each of the pressure sensors SR1 to SR8 in response to the pressing operation of the grip operator 2R is taken in from the detector 5R. Then, the process proceeds to step Sb2, where the values of the respective pressure data are compared, and the assignment number of the pressure sensor corresponding to the maximum pressure data is set in the register PM. As a result, the pressure sensor pressed most strongly is specified. Here, the assignment number is a number for identifying the pressure sensors SR1 to SR8, and is assigned “1” to “8”. Based on this assignment number, the pitch offset is specified by the above-described octave specification or the like (see FIG. 7).

Next, at step Sb3, it is determined whether or not the pressure data corresponding to the pressure sensor specified at step Sb2 is larger than a preset threshold value, that is, whether or not a note-on event has occurred. Judge. In this case, if no pressure operation corresponding to the note-on event is performed on any of the pressure sensors,
The determination result here is “No”, and the process proceeds to step Sb4.

In step Sb4, the CPU 1 controls the sound source 8
Sends a note-off signal indicating that it is in a note-off state. Next, in step Sb5, an initial value “& HFF (hexadecimal)” is set in the register OPM. This register OPM stores the previous value of the assigned number corresponding to the pressure sensor having the note-on event, and its use will be described later. Then, the processing of the CPU 1 ends the grip processing routine, and returns to the main routine (see FIG. 9) again. C
When the processing of PU1 returns to the main routine, step Sa
5 (see FIG. 9) to call an elbow processing routine shown in FIG.

When the elbow processing routine is started, first, the CPU 1 proceeds to step Sc1 (see FIG. 11). At step Sc1, the CPU 1 captures the outputs of the gyros b1 and b2 of the right elbow 1R via the detector 4R, and sets each of them as the right elbow angular velocity data in the registers S1 and S2. On the other hand, the outputs of the gyros b3 and b4 of the left elbow 1L are fetched through the detector 4L, and the velocities are stored in the registers S3 and S4 as angular velocity data of the left elbow.
Set to 4.

Next, in step Sc2, the angular velocity data is subtracted as the angle difference from the current bending angle of the left and right elbows. That is, the register RE storing the bending angle of the right elbow has a negative angular velocity (counterclockwise rotation).
Is added, and the value of the register S2 given as a positive angular velocity (clockwise rotation) is subtracted. On the other hand, as in the case of the right elbow, the value of the register S3 given as a positive angular velocity is added to the register LE storing the bending angle of the left elbow, and the register S4 given as a negative angular velocity is added. Subtract the value of. Thus, at the start of the performance, with the left and right elbows straightened in advance, the above calculation is repeatedly performed each time the elbow processing routine is started, with respect to the values of the registers RE and LE in which the initial value “180 °” is set. Cumulative calculation corresponding to integration is performed, and the bending angles of the left and right elbows are obtained at predetermined time intervals.

Next, in step Sc3, it is determined whether the bending angles of the left and right elbows, that is, the values of the registers RE and LE, correspond to any of the three states (see FIG. 5) described above. I do. Then, step Sc4
Then, a note name corresponding to the determination result obtained in step Sc3 is specified from the note names "C" to "B" shown in FIG. 6, and is set in the register NN. After this, C
The processing of PU1 ends this elbow processing routine, and returns to the main routine (see FIG. 9) again. When returning to the main routine, the CPU 1 repeats the processing of steps Sa2 and Sa3 until the clock count value reaches a predetermined value. When the count value of the clock reaches the predetermined value, the result of the determination in step Sa3 becomes "Yes", the process proceeds to step Sa4 again, and the grip processing routine (see FIG. 10) is called again.

B: Operation at Note-On Next, when the player operates the grip operator 2R and any one of the pressure sensors SR1 to SR8 is pressed, in the aforementioned step Sb2 (see FIG. 10), The assigned number of the pressed pressure sensor is set in the register PM. Then, the process proceeds to step Sb3 again to determine whether or not a note-on event has occurred. In this case, since the pressure data of the pressed pressure sensor becomes larger than the threshold value, the determination result is “Yes” and the process proceeds to step Sb6.

In step Sb6, it is determined whether the value of the register PM is equal to the value of the register OPM. That is, in this embodiment, when a certain pressure sensor has been continuously pressed after a note-on event, a note-off state is automatically set.
In this case, in the aforementioned step Sb5, the register OP
After the initial value “& HFF (hexadecimal)” is set in M,
Since this is the first pressing operation, the judgment result here is “N
o ", and proceeds to the next step Sb7.

At step Sb7, the register P
The value of M, that is, the pitch offset amount corresponding to the assigned number of the pressure sensor that generated the note-on event is specified from among those shown in FIG. 7, and this is set in the register OFS as offset data. Next, when the process proceeds to step Sb8, the register NN has already been set in step Sc3.
To the note name data set in the register OFS
Is added to generate note code data NC.

Then, the CPU 1 sends the note code data NC and a note-on signal indicating a note-on state to the sound source 8, and outputs the pitch at the time of sound generation and the start of sound generation to the sound source 8. Is specified. Thereby, the sound source 8
Generates a tone signal corresponding to the designated pitch and supplies it to the sound system 9. The tone signal is generated from the speaker SP via the sound system 9.

Next, when the processing of the CPU 1 proceeds to step Sb9, the value of the register PM is set as the previous value of the assigned number of the pressure sensor that generated the note-on event.
Set to PM. Then, the processing of the CPU 1 ends the grip processing routine, and returns to the main routine (see FIG. 9) again.

C: Operation at Note-Off Next, if the player releases the pressing operation from the pressure sensor that generated this note-on event and if no other pressure sensor is pressed, the determination in step Sb3 is made. The result is "No", and the routine proceeds to step Sb4.

In step Sb4, the CPU 1 controls the sound source 8
Sends a note-off signal to instruct note-off. As a result, no tone signal is generated, and the sound generation stops. Then, in step Sb5, the initial value “& HFF (hexadecimal)” is set in the register OPM, the grip processing routine ends, and the process returns to the main routine. Thereafter, the elbow processing routine and the grip processing routine are called every time a predetermined time elapses, and the above operation is repeated.

As described above, in the present embodiment, based on the angular velocity data corresponding to the bending motion of the left and right elbows of the player (including the rotation around the shoulder) obtained from the motion detection devices 1R and 1L, The bending angles of the left and right elbows are calculated at regular intervals. Then, when note-on is instructed by the grip operator 2R, the pitch name is specified by the bending angles of the left and right elbows at that time, and the pitch offset amount is determined according to the pressure sensor for which note-on has been instructed. Thus, the pitch at the time of sound generation is determined, and a musical tone is generated.

(2) Second Embodiment Next, a description will be given of a second embodiment of a tone control apparatus to which the above-mentioned elbows 1R and 1L are applied. The configuration of the second embodiment is the same as the configuration of the first embodiment shown in FIG. 3 and FIG. The second embodiment differs from the first embodiment only in the operation of the CPU 1. That is, in the tone control device according to the present embodiment, the swinging motion of the left and right arms is detected at four places (the left and right upper arms and the forearm) where the gyros b1 to b4 of the elbows 1R and 1L are installed. The sounding start and the volume are controlled according to the result.

In this embodiment, the gyro b
The tone at the time of sound generation is specified by a combination of the detection result of the arm swing motion by 1 to b4 and the pressing operation of the grip operator 2R on the pressure sensors SR1 to SR8. FIG. 12 is a diagram illustrating an example of a tone color corresponding to these combinations. In this figure, for example, when the pressure sensor SR1 is pressed and note-on is instructed by the output of the gyro b3 provided on the forearm of the left elbow, the tone color of the "bass drum" is designated. .

Next, the operation of the tone control apparatus according to this embodiment will be described with reference to the flowcharts shown in FIGS. Note that the main routine executed by the CPU 1 is the same as the main routine of the first embodiment shown in FIG. 9, and a description thereof will be omitted. Further, here, as in the first embodiment, the operation is divided into cases corresponding to the actual operation, and the description will be sequentially advanced.

A: At the start of the swinging motion of the upper right arm First, the processing of the CPU 1 is performed in step S of the main routine.
At step a5 (see FIG. 9), an elbow processing routine shown in FIG. 13 is called. In the flowchart shown in this figure, the processing of the elbow 1R on the right elbow side is shown as an example for simplicity, and the description thereof will be limited to the right elbow side. To elbow 1 on the left elbow
It is assumed that L is also performed.

When the elbow processing routine is started, the CPU 1 advances the processing to step Sd1 (see FIG. 13). At step Sd1, the CPU 1 captures the outputs of the gyros b1 and b2 of the elbow 1R via the detector 4R, and stores each as angular velocity data in the registers S1 and S2.
Set to S2.

Next, at step Sd2, it is determined whether or not the absolute value of the value of the register S2 is larger than the threshold value THX.
That is, it is determined whether or not the swing operation of the upper right arm has been started. In this case, assuming that the swinging motion of the upper right arm has started, the result of this determination is “Yes”, and step S
Proceed to d3. In step Sd3, a sound generation control processing routine shown in FIG. 14 is called.

When the tone generation control processing routine is started, C
PU1 advances the process to step Se1 (see FIG. 14). At step Se1, the absolute value of the value of the register S2 is set to a threshold value THX2 determined corresponding to the absolute value.
Determine if it is greater than. The thresholds compared here are determined corresponding to the respective outputs of the gyros b1 to b4, and the thresholds THX1 to THX4 correspond to the registers S1 to S4, respectively. ing. The threshold value THX2 in this case is a value equal to the threshold value THX compared in step Sd2 described above. Accordingly, in step Sd2, since the sound generation control processing routine is started assuming that S2> THX2, the determination result here is "Yes", and the
Proceed to e2.

In step Se2, it is determined whether or not the operating flag stored in the register F2 is "1". Here, there are four types of operating flags corresponding to the gyros b1 to b4. A flag is set to “1” when a swing operation of a corresponding portion is started, and is set to “0” when the swing operation is completed. And are stored in registers F1 to F4, respectively. In this case, since the swing operation of the upper right arm is started, “0” is set in the operating flag of the register F2. Therefore,
The determination result here is “No”, and the process proceeds to Step Se3.

In step Se3, an initial value "0" is set in each of the registers SA2 and PK2 in which the swing angle (swing width) and the maximum angular velocity by the swing operation of the upper right arm are stored. Next, in step Se4, "1" is set in the operating flag of the register F2, and the swinging operation is set. Then, the processing of the CPU 1 terminates this sound generation control processing routine and returns to the elbow processing routine (FIG. 1).
Return to 3).

When the processing of the CPU 1 returns to the elbow processing routine, the flow advances to step Sd4 (see FIG. 13) to set "0" in the operating flag of the register F1 corresponding to the right forearm, and return to the initial setting. Then, the processing of the CPU 1 ends this elbow processing routine, and the main routine (FIG. 9)
Refer to).

B: During the swinging operation of the upper right arm, the processing of the CPU 1 is performed in step Sa5 of the main routine.
When the elbow processing routine is started again (see FIG. 9), the CPU 1 executes the above-described steps Sd1 and Sd2.
(See FIG. 13). In this case, in step Sd2, since the upper right arm is swinging, the absolute value of the value in the register S2 becomes larger than the threshold value THX, the determination result is "Yes", and the process proceeds to step Sd3. Then, in step Sd3, the sound generation control processing routine (FIG. 14) is called again.

When the tone generation control processing routine is started, C
The processing of PU1 is performed in step Se1 described above (see FIG. 14).
The determination result here is "Yes" again, and the process proceeds to step Se2. In step Se2, since the operating flag of the register F2 is set to "1" in step Se4, the determination result is "Yes" and the process proceeds to step Se5.

At step Se5, the absolute value of the value of the register S2 is added to the register SA2. That is, during the swinging operation of the upper right arm, by repeatedly executing step Se5, the angular velocity data obtained from the gyro b2 is sequentially accumulated, and finally the swing angle is obtained.

Next, proceeding to step Se6, it is determined whether or not the absolute value of the value of the register S2 is larger than the value of the register PK2. In this case, since the initial value “0” is set in the register PK2 in the above-described step Se3, the determination result is “Yes”, and the
Proceed to e7. In step Se7, the absolute value of the value of the register S2 is set in the register PK2. On the other hand, when the determination result of step Se6 is “No”, the CPU 1
Performs no processing and ends the sound generation control processing routine. That is, while the steps Se6 and Se7 are repeatedly performed during the swinging operation of the upper right arm, the value of the register PK2 is sequentially updated with the larger angular velocity data, and the maximum angular velocity is finally obtained. .

Then, the processing of the CPU 1 terminates the tone generation control processing routine and returns to the elbow processing routine (FIG. 1).
3), execute the above-described step Sd4 (see FIG. 13), and then return to the main routine (see FIG. 9). Thereafter, the operation described above is repeated during the swinging operation of the upper right arm.

C: At the time of ending the swinging operation of the upper right arm When the swinging operation of the upper right arm is completed, the determination result in step Se1 (see 13) of the sound generation control processing routine becomes "No", and the process proceeds to step Se8. Step Se
At 8, it is determined whether the operating flag of the register F2 is not "0". In this case, since the operating flag is set to "1", the result of this determination is "Yes" and the process proceeds to step Se9. In step Se9, "0" is set in the above-described operation flag, and the swinging operation is not performed.

Next, at step Se10, the swing angle stored in the register SA2 becomes equal to the threshold value STH.
Determine if it is greater than. That is, it is determined from the detected magnitude of the swing motion whether or not the current swing motion is an operation instructing a note-on. Here, if the value of the register SA2 is larger than the threshold value STH, the determination result here is “Yes”, and the process proceeds to the next step Se11.

In step Se11, the CPU 1 sets the sound source 8
Instruct pronunciation to. That is, in this case, assuming that the pressure sensor SR2 of the grip operator 2R is being pressed, the tone color “Akogo (high)” is specified from the tone color group shown in FIG. The tone to be played is specified. Further, an initial touch corresponding to the value of the register SA2, that is, the swing angle is instructed to the sound source 8. The sound source 8 generates a tone with a specified tone color and a strength (volume, tone color) corresponding to the designated initial touch. Here, as the data for generating the initial touch, the value of the register PK2, that is, the maximum angular velocity can be used instead of the swing angle.

Thus, the sound source 8 generates a tone signal having a volume corresponding to the designated tone color and the initial touch, and supplies this to the sound system 9. The tone signal is generated from the speaker SP via the sound system 9. Then, the processing of the CPU 1 is performed in step Se.
Go to 12

On the other hand, in step Se10, if the value of the register SA2 is smaller than the threshold value STH because the value of the operating flag F2 is "0" and the current swing width is small, The judgment result is “No”,
This sound generation control processing routine ends.

In step Se12, time counting by a counter (not shown) is started. The time counting is performed to measure a time interval from the start of the current sound generation to the start of the next sound generation (described later) by the swinging motion of the right forearm. That is, when the upper arm is swung as in this case, it is highly likely that the forearm beyond the elbow is swung irrespective of the player's intention. In such a case, it is necessary to prevent a sounding instruction from being immediately given by the swinging motion of the forearm after being instructed by the player after the sounding instruction by the swinging motion of the upper arm. Therefore, after starting the time measurement in step Se12, in step Sd5 (FIG. 13) to be described later, the elapse of a predetermined time is determined, and thereby the sounding instruction by the swinging motion of the forearm is permitted.

After the execution of step Se12, the processing of the CPU 1 terminates this sound generation control processing routine. And
The process returns to the elbow processing routine (see FIG. 13) again, executes the aforementioned step Sd4 (see FIG. 13), and then returns to the main routine (see FIG. 9).

D: After the sounding instruction by the swinging motion of the upper right arm, and before the elapse of a fixed time, the processing of the CPU 1 is performed in step Sa5
When the elbow processing routine is started again (see FIG. 9), the CPU 1 executes the above-described steps Sd1 and Sd2.
(See FIG. 13). In step Sd2, in this case, since the swinging operation of the upper right arm has been completed, the absolute value of the value of the register S2 is smaller than the threshold value THX, the operating flag F2 is also set to "0", and the determination result is “No” is determined, and the process proceeds to step Sd5.

In step Sd5, the aforementioned step Se
It is determined whether or not the count value of the time count started in 12 has reached a predetermined value, that is, whether or not a predetermined time has elapsed since the previous sounding instruction by the swinging motion of the upper right arm. Now, if you haven't passed a certain amount of time,
The result of this determination is "No", after which no processing is performed and the elbow processing routine is terminated. In other words, even if the right forearm is swung while the predetermined time has not elapsed, this operation is ignored and no sound is instructed.

E: Swing operation of right forearm after a lapse of a predetermined time If it is assumed that the swing operation of the right forearm is started after a lapse of a predetermined time from the previous sounding instruction, the aforementioned step Sd5 (FIG. 1)
3) is “Yes,” and the process proceeds to the next step Sd6. In step Sd6, a sound generation control processing routine is called. Then, on the basis of the angular velocity data obtained from the angular velocity meter b1, that is, the value of the register S1, the same operation as that in the case of the swing of the upper right arm described above is repeated, and the sound is generated. That is, the start and end of the swing of the right forearm are detected from the angular velocity of the right forearm, and the generation of a musical tone is controlled based on the magnitude of the swing angle of one swing.

As described above, in this embodiment, the swinging motion of the left and right arms of the player is determined by the angular velocity meters b of the elbows 1R and 1L.
Detection is performed at four places where 1 to b4 are installed, and the start of sound generation and the volume are controlled according to the detection results. At this time, as described above, in step Sd2 (FIG. 13), the presence or absence of the swinging motion of the upper arm is determined prior to the processing of the forearm, so that the sounding instruction by the upper arm is always performed in the swinging motion of the entire arm. Has priority over that of the forearm. As a result, it is possible to prevent a sounding instruction from being immediately given by the swinging motion of the forearm portion against the intention of the player after the sounding instruction by the swinging motion of the upper arm.

[0063]

As described above, according to the present invention, since the bending / extending operation of the joint is detected by using the angular velocity detecting means, the mounting can be performed easily without strict positioning. The effect is obtained. In addition, since the rotation of the joint is not hindered by the detection unit such as the plate body, an effect that an unpleasant wearing feeling is not accompanied can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a motion detection device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a principle of measuring an elbow bending angle when the motion detection device is used.

FIG. 3 is a diagram showing an external configuration of a first embodiment to which the motion detection device is applied.

FIG. 4 is a block diagram showing a configuration of a tone control device MC according to the embodiment.

FIG. 5 is a diagram showing three-stage state assignment with respect to a bending angle of an elbow during sound generation in the embodiment.

FIG. 6 is a diagram showing pitch names assigned to combinations of states of the bending angles of the left and right elbows in the embodiment.

FIG. 7 is a diagram showing a pitch offset mode corresponding to each of the pressure sensors SR1 to SR8 of the grip operator 2R in the embodiment.

FIG. 8 is a diagram showing the offset mode represented by MIDI note numbers.

FIG. 9 is a flowchart showing a main routine of a control program executed by a CPU 1 in the embodiment.

FIG. 10 is a flowchart showing a grip processing routine of a control program executed by a CPU 1 in the embodiment.

FIG. 11 is a flowchart showing an elbow processing routine of a control program executed by a CPU 1 in the embodiment.

FIG. 12 is a diagram illustrating a detection result of the swinging motion of the arm by the gyros b1 to b4 and the pressure sensors SR1 to SR8 of the grip operator 2R in the second embodiment to which the motion detection device is applied.
FIG. 10 is a diagram showing a tone color corresponding to a combination with a pressing operation on the sound.

FIG. 13 is a flowchart showing an elbow processing routine of a control program executed by a CPU 1 in the embodiment.

FIG. 14 is a flowchart showing a sound emission control processing routine of a control program executed by a CPU 1 in the embodiment.

[Explanation of symbols]

1 ... CPU, 1R, 1L ... Elbow (motion detection device), 2 ... ROM, 2R ... Grip operator, 3 ...
RAM, 5R, 4R, 4L: detector, 6: panel switch, 7: display, 8: sound source, 9: sound system, 10: bus, a: mounting equipment, b1-b4 …
Angular meter, c …… Cable

Claims (2)

(57) [Claims] 1. A motion detection device mounted on a joint of a limb and detecting a bending angle of the joint, provided on one limb side and the other limb side connected to the joint, First and second angular velocity detecting means for detecting angular velocity associated with the bending and stretching operation; first angular velocity information output by the first angular velocity detecting means; and second angular velocity information output by the second angular velocity detecting means. A motion detecting device comprising: a calculating unit that calculates a bending angle of the joint based on angular velocity information. 2. An angular velocity detecting means mounted on the limb for detecting an angular velocity of a part of the mounted limb, and an operation of the part on which the angular velocity detecting means is mounted based on the angular velocity detected by the angular velocity detecting means. Operation detecting means for detecting start and end of operation; and integrating the angular velocity output from the angular velocity detecting means during a period from the start of operation to the end of operation of the part on which the angular velocity detecting means is detected, detected by the operation detecting means. And a control means for instructing the start of tone generation when the integrated value of the calculation means is equal to or greater than a predetermined value.