JP2004004360A - Detection sensor evaluation device, electronic musical instrument, and electronic keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hammer detection sensor and a keyboard musical instrument for quantitatively and absolutely evaluating a detection sensor for detecting the operating conditions of an operating piece. <P>SOLUTION: A detection sensor evaluation system comprises an existing player piano 100, an observation instrument 400, and an evaluation device 500 and the like. The observation instrument 400 is provided with a second detection sensor 410, different from a first detection sensor 205 mounted previously on the player piano 100. The evaluation device 500 evaluates the performance of the first detection sensor 205 by comparing reference operation condition information produced, on the basis of the detection result of the second detection sensor 410 with the operating condition information generated on the basis of the detection result of the first detection sensor 205. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a detection sensor evaluation device, an electronic musical instrument, and an electronic keyboard musical instrument.
[0002]
[Prior art]
2. Description of the Related Art In recent years, an automatic piano has a function of generating a mechanical musical tone by striking a string in response to a key press operation of a user, and a function of generating an electronic musical tone in response to the operation (silence playing function). Things are widespread.
[0003]
FIG. 13 is a diagram showing a schematic configuration of an automatic piano 100 having a silence performance function.
The automatic piano 100 includes a hammer action mechanism 210 that transmits the movement of the plurality of keys 201 arranged in a direction perpendicular to the plane of the drawing to the hammer 202 and the hammer shank 203, a muffling mechanism 220 that prevents the hammer 202 from hitting the string S, The automatic piano 100 includes a hammer detection mechanism 230 that detects the operation of the hammer 202 and a controller 240 that controls the entire automatic piano 100.
The silencing mechanism 220 includes a stopper 221, a motor (not shown), and the like. When an instruction to perform mute is given through an operation unit or the like (not shown), the controller 240 rotates the motor appropriately and moves the stopper 221 to the position shown by the broken line in FIG. Block the strings.
[0004]
Here, FIG. 14 is a diagram for explaining the configuration of the hammer detection mechanism 230.
The hammer detection mechanism 230 includes a shutter 204 provided on the hammer shank 203, and a hammer detection sensor 205 for detecting a light blocking timing by the shutter 204.
The hammer detection sensor 205 is provided on the hammer detection sensor stay 206, and detects the timing at which the shutter 204 passes the detection point R shown in FIG. The detection result of the hammer detection sensor is supplied to the controller 240, and the controller 240 calculates the string striking timing and the string striking speed of the hammer 202 (operation state information) based on the detection result.
The controller 240 controls generation of an electronic musical tone corresponding to a key operation based on the string striking timing calculated in this way. As a result, an electronic musical tone (a sounding body) (not shown) or the like generates an electronic musical tone whose volume or the like is controlled in accordance with the key operation of the user.
[0005]
As described above, in addition to the automatic piano 100 that detects the operation of the hammer 202 and controls the generation of electronic musical sounds based on the detection result, the operation of the key 201 instead of the operation of the hammer 202 is directly detected. Automatic pianos that control electronic musical tone generation based on music are also widely used.
[0006]
In such an automatic piano, a shutter is attached to the lower surface of each key, and a key detection sensor that detects light-shielding timing by the shutter is provided at a position facing the lower surface of each key. The key detection sensor detects the timing at which the shutter passes the detection point and supplies the detection result to the controller, similarly to the above-described hammer detection sensor 205. The controller calculates a key pressing timing, a key speed, and the like (operation state information) based on a detection result supplied from the key sensor, and controls generation of an electronic musical tone corresponding to the key operation. As a result, similarly to the automatic piano 100, an electronic musical tone (for example, a musical tone generated based on MIDI data) whose volume and the like are controlled in accordance with a key operation of a user is generated from an electronic sound source (not shown) or the like. .
[0007]
[Problems to be solved by the invention]
As described above, an automatic piano having a silencing performance function obtains a key speed, a string striking speed, and the like based on the detection results of the hammer detection sensor and the key detection sensor, and electronically responds to the determined key speed, string striking speed, and the like. Although the generation of musical tones is controlled, it is not known until the evaluation is made whether or not the key operation of the user is correctly reflected in the generated electronic musical sound (for example, whether or not the strength of the key operation is correctly reflected in the volume). As such an evaluation method, a method of evaluating whether or not a key operation is correctly reflected by a manual operation by a serviceman performing piano maintenance (hereinafter referred to as a manual evaluation method), and a jig instead of the manual operation A method for evaluating whether or not key operations are correctly reflected using a keyboard or an evaluation keypad (hereinafter referred to as a machine evaluation method) is widely used. There was such a problem.
[0008]
First, in the hand-playing evaluation method, a serviceman performs hand-playing while changing the keying strength and the like in various ways, and at this time, the volume of an electronic musical tone generated from the automatic piano is an appropriate volume or the like reflecting the keying strength. In order to evaluate the evaluation, the reliance on the sensations and the like obtained from the experience of the serviceman or the like is apt to be made, and the evaluation tends to be inaccurate. In addition, since there is no reproducibility in the manual operation, even if an abnormality is recognized when performing a predetermined manual operation, it is difficult to reproduce the operation, it is a one-time abnormality, or There was a problem that it was not possible to determine whether it was a systematic abnormality.
[0009]
On the other hand, in the mechanical evaluation method, a key is mechanically hit using the above-described key tapping device or the like. At this time, it is determined whether or not the volume of a musical tone generated from the automatic piano corresponds to the key hitting intensity, for example, from the key hitting intensity. Evaluate whether the estimated volume value and the volume value of the musical tone actually generated from the automatic piano match. For this reason, although there is repetition reproducibility compared with the above-mentioned manual performance evaluation method, even if there is an abnormality cause only on the keying device side, it is evaluated as an abnormality on the automatic piano side, and an absolute evaluation cannot be performed. was there. Another problem is that it is not possible to specify whether the abnormality detected when the key is pressed is due to an abnormality in the keying device or an abnormality in the automatic piano.
[0010]
The present invention has been made in view of the circumstances described above, and is a detection sensor evaluation device, an electronic musical instrument, and an electronic musical instrument that can quantitatively and absolutely evaluate a detection sensor that detects an operation state of an operation element. The purpose is to provide keyboard instruments.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention provides an evaluation device for a first detection sensor that detects an operation state of an operation element and generates operation state information for controlling generation of a musical sound by a sounding body based on the detection result. An acquisition unit that acquires operation state information generated by the first detection sensor; a second detection sensor that continuously detects an operation displacement of the operation element and sequentially outputs a detection result as waveform information; A generating unit that generates reference operation state information corresponding to the operation state information by analyzing the waveform information supplied from the second detection sensor, and compares the operation state information with the reference operation state information In this case, there is provided an evaluation means for evaluating the first detection sensor.
[0012]
In addition, the present invention controls an operation element, a first detection sensor that detects an operation state of the operation element, and generates operation state information based on a detection result, and controls generation of a musical tone based on the operation state information. An electronic musical instrument comprising: a control unit; an acquisition unit configured to acquire the operation state information; a second detection sensor configured to continuously detect an operation displacement of the operation element and sequentially output a detection result as waveform information; Generating means for generating reference operation state information corresponding to the operation state information by analyzing the waveform information supplied from the second detection sensor; and comparing the operation state information with the reference operation state information. And evaluating means for evaluating the first detection sensor.
[0013]
Further, the present invention provides a key, a first detection sensor for detecting an operation state of the key, and generating operation state information based on a detection result, and a control means for controlling generation of a musical tone based on the operation state information. An electronic keyboard instrument comprising: an acquisition unit configured to acquire the operation state information; a second detection sensor configured to continuously detect an operation displacement of the key and sequentially output a detection result as waveform information; By analyzing the waveform information supplied from the detection sensor, by generating means for generating reference operation state information corresponding to the operation state information, by comparing the operation state information and the reference operation state information, Evaluation means for evaluating the first detection sensor.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to an automatic piano having a silence performance function will be described. These embodiments show one aspect of the present invention, and do not limit the present invention, and can be arbitrarily changed within the technical idea of the present invention.
[0015]
A. This embodiment
(1) Configuration of the embodiment
<Detection sensor evaluation system 300>
FIG. 1 is a block diagram illustrating a configuration of a detection sensor evaluation system 300 according to the present embodiment, and FIG. 2 is a diagram illustrating a configuration of an observation device 400 according to the present embodiment.
The detection sensor evaluation system 300 includes an existing automatic piano 100 having a silence performance function, a key tap 250, an observer 400, and an evaluator 500. Since the configuration of the automatic piano 100 according to the present embodiment is the same as that of the automatic piano shown in FIG. 13 described above, corresponding parts are denoted by the same reference numerals and description thereof will be omitted.
Now, as shown in FIG. 2, the observation device 400 according to the present embodiment includes a hammer detection sensor 410 different from the hammer detection sensor 205 mounted in the existing automatic piano 100 in advance, an A / D converter 420, And an output control unit 430. In the following description, in order to avoid confusion, the hammer detection sensor 205 installed in the existing automatic piano 100 in advance is referred to as a first detection sensor 205, and the hammer detection sensor 410 constituting the observation device 400 is referred to as a second detection sensor. Called 410.
[0016]
FIG. 3 is a diagram for explaining the second detection sensor 410.
The second detection sensor 410 is a sensor that continuously detects the position (operating displacement) of the hammer 202, and is detachably attached to a portion of the back surface of the fixedly arranged substrate 209 facing the hammer shank 203. The attachment of the second detection sensor 410 to the substrate 209 is performed by, for example, a service person or the like who evaluates the first detection sensor 205. In addition, regarding the attachment of the second detection sensor 410, the second detection sensor 410 may be attached to each hammer 202 of the automatic piano 100, but it may be attached to any one of the plurality of hammers 202. May be.
[0017]
The second detection sensor 410 includes a light emitting element and a light receiving element (both not shown). Light emitted from the light emitting element is reflected by the hammer shank 203, and reflected light from the hammer shank 203 The light is received by the light receiving element. The second detection sensor 410 continuously detects the position of the hammer 202 by detecting the displacement of the amount of light received by the light receiving element. Specifically, when the hammer 202 shifts from the rest position to the end position, the second detection sensor 410 acquires an output voltage corresponding to the amount of received light (see FIG. 4A). The second detection sensor 410 performs linearization correction on this (see FIG. 4B), associates the output voltage with the position of the hammer 202, and continuously detects the position of the hammer 202. When the position of the hammer 202 is continuously detected in this way, the second detection sensor 410 sequentially supplies the position of the hammer 202 to the A / D converter 420 as time-series analog data (see FIG. 2).
[0018]
The A / D converter 420 converts the time-series analog data sequentially supplied from the second detection sensor 410 into time-series digital data, and supplies the time-series digital data to the output control unit 430.
The output control unit 430 records, as waveform information, the time-series digital data supplied from the second detection sensor 410 via the A / D converter 420 sequentially supplied from the second detection sensor 410, and outputs the waveform data from the evaluator 500. The waveform information is output to the evaluator 500 in response to the request.
[0019]
More specifically, the output control unit 430 includes a recording unit 431 for recording waveform information on a storage medium such as a hard disk or a floppy disk (both not shown) mounted or mounted on the observation device 400, and an evaluator for evaluating the waveform information. And an external communication interface 432 for transmitting data to the communication device 500. The external communication interface 432 is connected to the evaluator 500 by a LAN (Local Area Network) cable or the like. When receiving the request for waveform information from evaluator 500 via the LAN cable, output control section 430 transmits the waveform information to evaluator 500. Note that, instead of the external communication interface 432, an external communication interface 432 compliant with a wireless standard (IEEE 802.11a, IEEE 802.11b, Bluetooth, etc.) is mounted on the evaluator 500, and the evaluator 500 and the observer 400 are installed. Wireless connection may be used.
[0020]
The evaluator 500 analyzes the waveform information supplied from the observer 400 to obtain reference operation state information indicating a stringing timing, a stringing speed, and the like to be originally detected. A comparison is made with the operation status information generated at 100, such as the string striking timing and the string striking speed.
Here, FIG. 5 is a block diagram showing a configuration of the evaluator 500.
The controller 510 includes a CPU, a ROM, a RAM, and the like, and centrally controls each unit of the evaluator 500 by appropriately activating various control programs stored in the ROM or the like.
[0021]
The external storage device 520 is configured by a floppy disk drive or the like, and reads data stored in a storage medium such as a floppy disk under the control of the controller 510. The storage medium mounted on the external storage device 520 stores operation state information generated by the controller 240 of the automatic piano 100.
[0022]
As described above (see the section of the prior art), the controller 240 of the automatic piano 100 generates operation state information indicating a string striking timing, a string striking speed, and the like based on the hammer operation detected by the first detection sensor 205. . The controller 240 controls the generation of electronic musical sounds based on the generated operation state information, and records the operation state information on the storage medium. As will be described in detail later, when the serviceman evaluates the first detection sensor 205, the serviceman takes out the storage medium from the automatic piano 100 and mounts it on the evaluator 500. As a result, the operation status information stored in the storage medium is read by the external storage device 520.
[0023]
The external communication interface 530 is a unit corresponding to the external communication interface 432 mounted on the observation device 400, and transmits a request for waveform information supplied from the controller 510 via the LAN cable to the observation device 400, The waveform information transmitted from the observation device 400 via the cable is received.
[0024]
The controller 510 analyzes the waveform information received via the external communication interface 530 to obtain reference operation state information indicating a stringing timing, a stringing speed, and the like to be originally detected. The operation status information read by the storage device 520 is compared with the operation status information. Then, controller 510 displays the comparison result on display device 540 and stores the comparison result in internal storage device 525 constituted by a hard disk or the like. The comparison operation between the reference operation state information and the operation state information will be described in detail in the description of the operation of the embodiment.
[0025]
The display device 540 includes a liquid crystal panel or the like, and displays a deviation such as a string striking timing and a string striking speed generated between the reference operation state information and the operation state information based on the comparison result supplied from the controller 510.
The input device 550 includes a power ON / OFF switch, an operation button, and the like, and notifies the controller 510 of an instruction or the like input via the operation button or the like.
The above is the detailed configuration of the detection sensor evaluation system 300 according to the present embodiment. Hereinafter, a specific operation of the detection sensor evaluation system 300 will be described in detail.
[0026]
(2) Operation of the embodiment
FIG. 6 is a conceptual diagram for explaining the operation of the detection sensor evaluation system 300. FIGS. 7 and 8 are a flowchart showing an observation process executed by the observer 400 and an evaluation executed by the evaluator 500, respectively. It is a flowchart which shows a process.
A serviceman who evaluates the performance of the first detection sensor 205 attaches the observer 400 to the board 209 of the automatic piano 100, and connects the observer 400 and the evaluator 500 with a LAN cable. Then, the serviceman turns on the power of the automatic piano 100, the observation device 400, and the evaluator 500, operates the operation unit and the like of the automatic piano 100, sets the mute mode, and then uses the keying device 250. A predetermined key 201 is depressed while changing the depressing strength (or keeping it constant).
[0027]
The hammer action mechanism 210 of the automatic piano 100 transmits the movement of the predetermined key 201 to the hammer 202 and the hammer shank 203. The first detection sensor 205 detects the timing at which the shutter 204 provided on the hammer shank 203 corresponding to the key 201 passes the detection point R (see FIG. 14), and supplies the detection result to the controller 240. The controller 240 generates operation state information indicating a string timing, a string velocity, and the like of the hammer 202 corresponding to the key 201 based on the detection result. The controller 240 controls the generation of electronic musical tones based on the generated operation state information, and records the operation state information in the first storage medium mounted on the automatic piano 100 (see FIG. 6). A1 shown). The processing described above is repeatedly executed according to the keying operation by the keying device.
[0028]
On the other hand, when the power is turned on, the observer 400 starts a control program stored in a memory (not shown) and executes an observation process (see FIG. 7).
The second detection sensor 410 of the observer 400 starts detecting the position of the hammer 202 according to a detection start command notified from a control unit (not shown) (step S1). The second detection sensor 410 continuously detects the position of the hammer 202 as described above, and supplies the detection result to the A / D converter 420 as time-series analog data (see B1 shown in FIG. 6). The A / D converter 420 converts the time-series analog data supplied from the second detection sensor 410 into time-series digital data and supplies the time-series digital data to the output control unit 430 (Step S2; see B2 shown in FIG. 6).
[0029]
Upon receiving the time-series digital data from the second detection sensor 410 via the A / D converter 420, the output control unit 430 supplies the time-series digital data to the recording unit 431. Upon receiving the time-series digital data from the A / D converter 420, the recording unit 431 records the time-series digital data as waveform information in a second storage medium such as a hard disk or a floppy disk (step S3; see B3 shown in FIG. 6). . A series of steps described above are repeatedly executed according to a keying operation by the keying device 250.
[0030]
After finishing the keying operation, the serviceman takes out the storage medium in which the operation state information is recorded from the automatic piano 100 and mounts it on the evaluator 500 (see C1 shown in FIG. 6). Then, the serviceman inputs an instruction to start the performance evaluation of the first detection sensor 205 by appropriately operating the operation buttons and the like of the evaluator 500.
Upon receiving such an instruction via the input device 550, the controller 510 of the evaluator 500 activates a control program stored in the internal storage device 525 or the like and executes an evaluation process (see FIG. 8).
[0031]
The controller 510 generates a request for waveform information in order to acquire waveform information from the observation device 400, and transmits this to the observation device 400 via the external communication interface 530 and the LAN cable (step Sa1; shown in FIG. 6). C2). Upon receiving the request instruction, the output control unit 430 of the observer 400 reads out the waveform information stored in the second storage medium and returns it to the evaluator 500 via the external communication interface 432 (C3 shown in FIG. 6). reference).
[0032]
When the controller 510 of the evaluator 500 receives the waveform information via the external communication interface 530 or the like, the controller 510 analyzes the waveform information to obtain reference operation state information indicating a stringing timing, a stringing speed, and the like to be originally detected. Is started (step Sa2 → step Sa3).
Here, FIG. 9 is a diagram for explaining a case where reference operation state information is generated from certain waveform information.
[0033]
The controller 510 obtains the correspondence between the position of the hammer 202 and the time shown in FIG. 9 from the waveform information received via the external communication interface 530 or the like. The controller 510 first obtains the stringing timing that should be originally detected by detecting the peak position (the end position shown in FIG. 9) of the hammer 202 shown in FIG. When the hammer 202 strikes the string S, the hammer 202 starts an operation of returning to a position before the strike (rest position shown in FIG. 9). Accordingly, the controller 510 obtains the string striking timing T0 by detecting the timing when the hammer 202 reaches the peak position, in other words, the timing when the moving direction of the hammer 202 changes.
[0034]
Next, the controller 510 obtains the stringing speed to be originally detected by detecting a preset detection section and a timing of passing through the detection section. When setting the detection section, for example, a detection section distance D1 (for example, 5 mm) for detecting a string striking speed, and a distance d1 (for example, 0.5 mm) between the end point position of the detection section and the peak position. Is set in advance. Then, the controller 510 calculates the start point position and the end point position of the detection section by back calculation from the string striking timing T0 obtained as described above, and further obtains the passing timings T1 and T2 of the start point position and the end point position. The controller 510 obtains the stringing speed V0 to be originally detected by substituting the passing timings T1, T2 of the hammer 202 and the detection section distance D1 thus obtained into the following equation (1).
V0 = (T2-T1) / D1 (1)
[0035]
In the present embodiment, the speed immediately before striking is detected as the striking speed, but the speed immediately after striking may be detected as the striking speed. In such a case, by setting the detection section distance D2 and the distance d2 (see FIG. 9) in advance in the same manner as described above, the passing timings T3 and T4 of the start point position and the end point position can be obtained from the string striking timing T0. As a result, the speed of the hammer 202 immediately after the impact can be obtained.
[0036]
Returning to FIG. 8 again, when the controller 510 generates the reference operation state information indicating the stringing timing, the stringing speed, and the like that should be originally detected, the controller 510 stores the reference operation state information in the external storage device 520 in the storage medium attached thereto. A command to read out the operation state information is sent (step Sa4). The external storage device 520 reads the operation state information stored in the storage medium in accordance with the read command, and returns this to the controller 510. The controller 510 compares the operation state information supplied from the external storage device 520 in this manner with reference operation state information obtained by analyzing the waveform information (step Sa5), and compares the operation state information with the reference operation state information. Find the deviation that occurred between Then, controller 510 displays the deviation thus obtained, that is, the comparison result, on display device 540 (step Sa6), stores the information in internal storage device 525, and ends the evaluation processing.
[0037]
In the above description, the case where the operation state information and the reference operation state information include the string striking timing and the string striking speed has been described as an example, but the musical tone generation determined from the string striking timing together with (or instead of) these. The sound volume and the like of the musical tone obtained from the timing, the string striking speed and the like may be included in the operation state information and the reference operation state information.
[0038]
For example, the controller 240 of the automatic piano 100 and the control unit (not shown) of the observer 400 are provided with functions for obtaining a musical sound generation timing and a musical sound volume from a string striking timing and a string striking speed, respectively. The controller 240 of the automatic piano 100 and the control unit of the observer 400 generate operation state information and reference operation state information including a string striking timing, a string striking speed, a musical sound generation timing, a musical sound volume, and the like, respectively, using these functions. I do. The evaluator 500 performs the above-described evaluation processing by comparing the operation state information generated in this way with the reference operation state information.
Hereinafter, a description will be given on the assumption that the operation state information and the reference operation state information include a string striking timing, a string striking speed, a musical sound generation timing, a volume of a musical sound, and the like.
[0039]
Here, FIG. 10 is a diagram exemplifying display contents of the display device 540.
As shown in FIG. 10, the display device 540 includes information included in the operation state information generated on the automatic piano 100 side, information included in the reference operation state information generated on the observer 400 side, The amount of deviation generated between each piece of information included in the operation state information and each piece of information included in the reference operation state information is displayed.
[0040]
The serviceman checks the content displayed on the display device 540, and grasps a problem or the like occurring in the automatic piano 100. For example, in the case where the amount of deviation that occurs when a specific key 201 is pressed exceeds a predetermined threshold, the serviceman determines that the first detection sensor 205 corresponding to the specific key 201 has some abnormality. It is estimated. Further, the serviceman specifies the cause of the deviation (abnormality) by analyzing in detail the deviation that has occurred between the information included in the operation state information and the information included in the reference operation state information. Then, the serviceman eliminates an abnormality that has occurred in the automatic piano 100 by adjusting the first detection sensor 205 corresponding to the specific key 201, and the like.
[0041]
As described above, according to the detection sensor evaluation system 300 according to the present embodiment, the second detection sensor 410 different from the first detection sensor 205 mounted on the existing automatic piano 100 is attached to the automatic piano 100. By comparing reference operation state information generated based on the detection result of the second detection sensor 410 with operation state information generated based on the detection result of the first detection sensor 205, the first detection sensor 205 performance is evaluated.
[0042]
Here, since the reference operation state information and the operation state information include parameters indicating the string striking timing, the string striking speed, the musical sound generation timing, and the volume of the musical sound, the first detection sensor 205 is quantitatively evaluated. be able to. That is, by comparing each parameter included in the operation state information with each parameter included in the reference operation state information as an absolute reference, the absolute evaluation of the first detection sensor 205 becomes possible, and as a result, the evaluation itself becomes accurate. .
[0043]
In addition, when there is a variation in the keying operation, the evaluation results are excluded, and an abnormality not caused by the first detection sensor 205 (for example, an abnormality on the keying device side) is eliminated and statistically evaluated. Can be.
Further, since the reference operation state information and the operation state information are sequentially recorded in the internal storage device 525 of the evaluator 500, a plurality of reference operation state information and operation state information recorded later are sequentially reproduced and evaluated. It is also possible to do. Thus, the evaluation time can be reduced as compared with the case where the first detection sensor 205 is evaluated for each key operation.
[0044]
B. Other
In the present embodiment described above, the operation state information generated on the automatic piano 100 side, the reference operation information generated on the observer 400 side, and the deviation amount generated between the operation state information and the reference operation state information. Is displayed on the display device 540 as an example, but in addition, a waveform (that is, waveform information) indicating the correspondence between the position of the hammer 202 and the time may be displayed (see FIG. 11). ). This makes it possible to make a determination based on the waveform, and to determine whether the abnormality is due to the first detection sensor 205 or an abnormality due to the keypad.
[0045]
Further, in the present embodiment, all parameters such as the string striking timing, the string striking speed, the musical sound generation timing, and the volume of the musical sound included in the operation state information and the reference operation state information are evaluated. Only some of the parameters may be evaluated. Further, what parameters (for example, only the string striking timing) are included in the operation state information and the reference operation state information can be appropriately changed according to the performance of the first detection sensor 205 and the like.
[0046]
In the present embodiment, the hammer detection sensor 205 has been described as an example of the first detection sensor 205 and the hammer detection sensor 410 has been described as the second detection sensor 410. However, for example, a key sensor may be used as the first detection sensor and the second detection sensor. Is also possible.
Here, FIG. 12 is a diagram illustrating a configuration when a key sensor is used as the first detection sensor and the second detection sensor.
[0047]
The first detection sensor 205 ′ previously mounted on the automatic piano 100 includes a light-emitting sensor head 221 and a light-receiving sensor head 222.
The light emitting side sensor head 221 emits the detection light supplied from the LED 224 via the optical fiber as the detection light having a diameter of about 5 (mm).
The light-receiving sensor head 222 receives the detection light emitted by the light-emitting sensor head 221 and sends out the light to the photodiode 225 via an optical fiber. The photodiode 225 converts the detection light into an output signal Sa corresponding to the amount of received light.
[0048]
With this configuration, the detection light emitted from the light-emitting side sensor head 221 is blocked according to the inserted state of the shutter 26 provided on the lower surface of the key 201, and the amount of light received by the light-receiving side sensor head 222 is determined by the position of the shutter 26, That is, it changes according to the position of the key 201. The photodiode 225 generates an output signal Sa based on the amount of light received by the light-receiving sensor head 222, and outputs this to the controller 240. The controller 240 generates operation state information indicating a key pressing timing, a key pressing speed, and the like based on the output signal Sa supplied from the photodiode 225. Note that the subsequent operation is substantially the same as that of the present embodiment, and thus the description is omitted. Further, the second detection sensor 410 'constituting the observation device 400 is substantially the same as the above-described second detection sensor 410 according to the present embodiment except for the point of attachment, and therefore the description is omitted.
[0049]
As described above, a key sensor is used as the first detection sensor and the second detection sensor, and the key pressing timing, the key pressing speed, the musical sound generation timing determined from these information, the volume of the musical sound, and the like are compared. May be evaluated.
[0050]
Further, these sensors may be appropriately combined to evaluate a first detection sensor mounted on the automatic piano side in advance. For example, a key sensor (first detection sensor) mounted on the automatic piano 100 may be replaced with a hammer sensor (second detection sensor). The key sensor and the hammer sensor (first detection sensor) mounted on the automatic piano 100 may be evaluated using a key sensor (second detection sensor).
[0051]
Further, not only the key 201 and the hammer 202 described above but also a pedal (not shown) mounted on the automatic piano 100 similarly includes a pedal sensor (first detection sensor) (not shown) mounted on the automatic piano 100. Alternatively, the evaluation may be performed using a pedal sensor (second detection sensor) provided in the observation device 400.
[0052]
Further, in the present embodiment, the case where the observer 400 and the evaluator 500 are connected by a LAN cable and the waveform information is transmitted from the observer 400 to the evaluator 500 (see FIG. 6). By attaching the second storage medium attached to the observation device 400 to the evaluator 500, the waveform information may be taken into the evaluator 500.
[0053]
Further, in the present embodiment, the case where the observer 400 and the evaluator 500 are separately configured has been described. However, it is needless to say that these components may be integrally configured. It may be configured integrally with both (or one of them) of the container 500. Further, the observation device 400 according to the present embodiment may be incorporated in the automatic piano 100 in advance so that the evaluation and adjustment of the first detection sensor 250 can be performed at any time.
[0054]
Further, in the present embodiment, the machine evaluation method in which the serviceman performs the evaluation by mechanically tapping using the keying device 250 has been described as an example. However, the manual evaluation method in which the serviceman actually performs the evaluation by manual operation The method is also applicable.
[0055]
Further, in the present embodiment, the case where the present invention is applied to an automatic piano has been described as an example. As is clear from the above description, the present invention is applicable to any device that controls the generation of musical sounds by the sounding body in accordance with the operation state of the operator.
[0056]
【The invention's effect】
As described above, according to the present invention, it is possible to quantitatively and absolutely evaluate a detection sensor that detects an operation state of an operation element.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a detection sensor evaluation system according to an embodiment.
FIG. 2 is a diagram showing a configuration of an observer according to the embodiment.
FIG. 3 is a diagram for explaining a second detection sensor according to the embodiment.
FIG. 4 is a diagram showing a correspondence relationship between a position of a hammer and an output voltage according to the embodiment.
FIG. 5 is a diagram showing a configuration of an evaluator according to the embodiment.
FIG. 6 is a conceptual diagram illustrating the operation of the evaluation sensor system according to the embodiment.
FIG. 7 is a flowchart showing an observation process according to the embodiment.
FIG. 8 is a flowchart showing an evaluation process according to the embodiment.
FIG. 9 is a diagram illustrating a case where reference operation state information is generated from the waveform information according to the embodiment.
FIG. 10 is a diagram exemplifying display contents of the display device according to the embodiment.
FIG. 11 is a diagram illustrating display contents of a display device.
FIG. 12 is a diagram showing a configuration when a key sensor is used as a first detection sensor and a second detection sensor.
FIG. 13 is a diagram showing a schematic configuration of an automatic piano having a mute function.
FIG. 14 is a diagram for explaining a configuration of a hammer detection mechanism.
[Explanation of symbols]
100: automatic piano, 205: first detection sensor, 240: controller, 400: observer, 410: second detection sensor, 430: output control unit, 431 ... Recording unit, 432, 530: external communication interface, 500: evaluator, 510: controller, 520: external storage device, 525: internal storage device, 550: input device.

Claims (10)

An evaluation device for a first detection sensor that detects an operation state of an operation element and generates operation state information for controlling generation of a musical sound by a sounding body based on a detection result,
Acquiring means for acquiring operation state information generated by the first detection sensor;
A second detection sensor that continuously detects the operation displacement of the operation element and sequentially outputs a detection result as waveform information;
Generating means for analyzing the waveform information supplied from the second detection sensor to generate reference operation state information corresponding to the operation state information;
An evaluation device for evaluating a detection sensor, comprising: evaluation means for evaluating the detection sensor by comparing the operation state information with the reference operation state information. A sensor mounted on an electronic musical instrument for controlling generation of musical sounds based on given operation state information, wherein the sensor detects an operation state of an operator of the electronic musical instrument and generates operation state information based on the detection result. An evaluation device for a detection sensor,
Acquiring means for acquiring operation state information generated by the first detection sensor;
A second detection sensor that continuously detects the operation displacement of the operation element and sequentially outputs a detection result as waveform information;
Generating means for analyzing the waveform information supplied from the second detection sensor to generate reference operation state information corresponding to the operation state information;
A detection sensor evaluation device, comprising: evaluation means for evaluating the second detection sensor by comparing the operation state information with the reference operation state information. The electronic musical instrument is an electronic keyboard instrument,
The detection sensor evaluation device according to claim 2, wherein the operation element is a key of the electronic keyboard instrument. The electronic musical instrument is an electronic keyboard instrument,
The electronic keyboard instrument includes, besides a key, a hammer, at least one type of pedal,
The first detection sensor detects an operation state of a specific type of operator among a plurality of types of operators provided in the electronic keyboard instrument,
3. The detection sensor according to claim 2, wherein the second detection sensor continuously detects an operation displacement of the same type of operation element as the first detection sensor, and sequentially outputs a detection result as waveform information. 4. Evaluation device. The second detection sensor continuously detects an operation displacement of a different type of operator from the plurality of types of operators provided in the electronic keyboard instrument and a specific type of operator detected by the first detection sensor, The detection sensor evaluation device according to claim 4, wherein the detection results are sequentially output as waveform information. The detection sensor evaluation device,
The observation unit including the acquisition unit and the second detection sensor, and an evaluator including the generation unit and the evaluation unit, wherein the observation unit and the evaluator are configured separately. The detection sensor evaluation device according to any one of claims 2 to 5, wherein: An operation element, a first detection sensor that detects an operation state of the operation element and generates operation state information based on the detection result, and control means that controls generation of a musical tone based on the operation state information. In electronic musical instruments,
Acquisition means for acquiring the operation state information;
A second detection sensor that continuously detects the operation displacement of the operation element and sequentially outputs a detection result as waveform information;
Generating means for analyzing the waveform information supplied from the second detection sensor to generate reference operation state information corresponding to the operation state information;
An electronic musical instrument comprising: an evaluation unit that evaluates the first detection sensor by comparing the operation state information with the reference operation state information. An electronic keyboard comprising: a key; a first detection sensor that detects an operation state of the key and generates operation state information based on a detection result; and a control unit that controls generation of a musical tone based on the operation state information. In musical instruments,
Acquisition means for acquiring the operation state information;
A second detection sensor that continuously detects the operation displacement of the key and sequentially outputs a detection result as waveform information;
Generating means for analyzing the waveform information supplied from the second detection sensor to generate reference operation state information corresponding to the operation state information;
An electronic keyboard instrument comprising: an evaluation unit configured to evaluate the first detection sensor by comparing the operation state information with the reference operation state information. In addition to the key, a hammer, at least one of a pedal operation device,
The first detection sensor detects an operation state of a specific type of operator among a plurality of types of operators provided in the electronic keyboard instrument,
9. The electronic keyboard according to claim 8, wherein the second detection sensor continuously detects an operation displacement of an operation element of the same type as the first detection sensor, and sequentially outputs a detection result as waveform information. 10. Musical instruments. The second detection sensor continuously detects an operation displacement of an operator of a type different from a specific type of operator detected by the first detection sensor among a plurality of types of operators provided in the electronic keyboard instrument, The electronic keyboard instrument according to claim 9, wherein the detection results are sequentially output as waveform information.

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