JP4956895B2 - Operation device malfunction improvement support method and electronic device - Google Patents

Description

  The present invention improves the malfunction of an operation device provided as parameter setting information input means in an audio device, an audio signal mixer, an electronic musical instrument such as an electronic organ or an electronic piano, a lighting dimmer, and other various electronic devices. The present invention relates to an operation device device malfunction improvement support method to be supported, and an electronic apparatus including one or more operation device devices.

For example, a mixer that mixes multi-channel audio signals is provided with a number of operation devices such as pan control, volume adjustment, and left / right balance adjustment as parameter setting information input means for each channel.
Conventionally, as such an operation element device, a linear resistor and a conductor are provided in parallel, and by sliding the sliding operation element, a conduction point between the resistor and the conductor moves, A slide volume in which the resistance value between one end and the conductor is changed is often used.

However, this slide volume has a problem that because the resistor and the sliding operation element always slide in contact with each other, noise is likely to occur due to wear of both, and the linearity of the resistance value change also decreases. There is also a problem that the resistance value is easily affected by temperature changes.
Therefore, as an operator device that can solve these problems, as seen in Patent Document 1, a linear scale in which a digital signal pattern is recorded linearly, and a digital signal obtained by optically reading the linear scale without contact. There has been proposed a non-contact digital fader that includes an optical sensor that outputs a signal and a moving member (operator) that moves along a linear scale while holding the optical sensor.
JP 2003-21541 A

According to this non-contact digital fader, the problem due to wear can be essentially avoided, so there is little noise, and since the digital signal is read, there is little influence of temperature change, and it is also suitable for digital electronic equipment.
However, even in such a non-contact operating device, a portion where the operating device protrudes and moves is open, so that if it is used for a long period of time, dust or dirt adheres between the linear scale and the optical sensor, resulting in malfunction. This is likely to occur, and when used in an environment with a lot of humidity and dust, it is more likely to malfunction. Moreover, when using it for the mixer mentioned above, since it ventilated with the fan in the mixer for heat dissipation, there existed a problem that dust was suck | inhaled with the flow of air and it was easy to adhere to a position sensing part.

  The present invention has been made to remedy such a problem. When a non-contact operating device as described above malfunctions, it is immediately detected to assist the improvement, and to an electronic device. An object of the present invention is to promptly detect when an operating device provided therein malfunctions and prompt the cleaning or perform cleaning.

In order to achieve the above object, the present invention provides an operating device for an electronic apparatus that includes at least one partially open operating device that sets an electrical parameter by moving the operating portion relative to the fixed portion. There is provided a malfunction improvement support method for an operator device which supports improvement of malfunction of the operation device.
That is, in the operation device malfunction improvement support method, the position of the operation unit of the operation device is optically detected using a gray code, and the operation unit is moved during the movement of the operation unit with respect to the fixed unit. Each time the detected value of the position of the control section changes, the previous and current values are compared, and if the difference exceeds a predetermined value, it is determined as a malfunction, and thereafter, until the malfunction is not determined. A first step of outputting a normal detection value immediately before being determined as a malfunction as the detection value of the position of the operation unit to a utilization circuit for setting the electrical parameter, and when the malfunction is determined in the first step, It is recognized as a malfunction of the operation device, and a second step is urged to support the improvement of the malfunction of the operation device (by a message such as a display or voice, a warning sound or a warning display).

According to another aspect of the present invention, there is provided an electronic apparatus including at least one partially-open type operating device device in which an operating device portion moves relative to a fixed portion to set an electrical parameter. provide.
That is, the position of the operation unit of the operation unit is optically detected using a gray code, and the detected value of the position of the operation unit changes during movement of the operation unit with respect to the fixed unit. Each time the previous and current values are compared, if the difference exceeds a predetermined value, it is determined that there is a malfunction, and then the normal detection value immediately before the malfunction is determined until it is not determined as a malfunction. Is output to a utilization circuit for setting the electrical parameter as a detected value of the position of the operating portion, and a warning signal generating means for generating a warning signal and the operating device by the warning signal generated by the warning signal generating means (message by display and voice, warning sound or warning display due) of urging the cleaning, characterized in that a cleaning instruction means.

Alternatively, it is more preferable to provide a cleaning means for cleaning the operation device by a warning signal generated by the warning signal generating means.
The cleaning means may be means for cleaning by injecting air into the operation device.
Alternatively, the cleaning unit may include a vibrating unit that vibrates a position sensing unit that detects the position of the operation unit of the operation unit.

  According to the present invention, in an electronic apparatus provided with at least one or more partially-open type operating device that moves the operating device relative to the fixed portion to set an electrical parameter, the operating device is operated by Since the position of the child portion is optically detected using a gray code, information on the absolute position of the operator portion can be obtained as a digital signal without contact. Therefore, problems due to wear can be avoided, there is little noise, the influence of temperature change is small, and it is also suitable for digital electronic devices.

In addition, when the operator device malfunctions, it is immediately detected, and it is supported by the message display, voice announcement, warning sound, warning display, etc. When the operator device is noticed and cleaned, dust or the like adhered between the gray code and the optical sensor can be removed, and the cause of malfunction can be removed.
In addition, while detecting the malfunction of the operation device, since the normal detection value immediately before detecting the malfunction is output as a detection value of the position of the operation portion to the use circuit for setting the electrical parameter, It is possible to prevent the setting of the electrical parameter from greatly deviating.
Further, in an electronic device provided with a cleaning means, when a malfunction of the operation device occurs, the operation device can be automatically cleaned to eliminate the cause of the malfunction.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
[First Embodiment: FIGS. 1 to 3 and FIG. 9]
First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3 and FIG. FIG. 2 is a perspective view showing a simplified external appearance of a mixer which is an example of an electronic apparatus that has implemented the operation error improvement support method according to the present invention. FIG. 1 is a block diagram showing a circuit configuration of a warning signal generating means according to the present invention of the mixer, and FIG. 3 shows a cross section of the operation device in FIG. 1 together with a configuration example of a cleaning unit of the second embodiment for the convenience of illustration. FIG. FIG. 9 is an explanatory diagram showing the relationship between the gray code pattern in FIG. 3 and each detected value (gray code) and a decimal number.

The mixer 1 shown in FIG. 2 is an electronic device that inputs a plurality of audio signals, mixes them appropriately, and outputs them with various effects as necessary. The front side of the top surface of the main body 2 is substantially horizontal. The first operation panel unit 3 and the second operation panel unit 4 are inclined rearward and rearward.
In the first operation panel unit 3, a large number of operation device (faders) 10 are arranged in a row extending in the front-rear direction and spaced in the left-right direction. Each operation device 10 is provided with a knob 11 for moving an operation portion described later. The large number of operation devices 10 are assigned for pan control, volume adjustment, left / right balance adjustment, and the like of each channel. The second operation panel unit 4 is provided with a liquid crystal display (LCD) 6 for displaying various information, messages, and the like at the center, and a number of switches, rotary volume knobs, display LEDs, etc. are provided on the left and right sides thereof. It is arranged.

Next, a configuration example of the operator device 10 will be described with reference to FIG. FIG. 3 shows the cross section of the operating device 10 together with the cleaning unit of the second embodiment. In the first embodiment, only the configuration of the operating device 10 will be described.
The operation device 10 has two upper and lower slide shafts 13 fixed in parallel in the longitudinal direction in a case 12 that is a fixed portion, and is moved by being guided by the two slide shafts 13. The operation part 14 to be operated is internally provided.

  The operating element 14 is provided such that a block-like moving body 15 is slidably passed through the two slide shafts 13, and the sensor substrate 17 is provided with a spacer 18 on the front surface (the left surface in FIG. 3). 4 places are fixed and attached by a set screw 19. A photo sensor unit 20 is provided in the center of the front surface of the sensor substrate 17. A projecting piece 16 is provided on the upper portion of the moving body 15 and protrudes to the outside through a slit 12a formed in the upper portion of the case 12 along the longitudinal direction, and the knob 11 is fixed thereto.

Therefore, this operating element device 10 is a partially open type operating element device in which at least the upper part of the case 12 is partially opened by the slit 12a. In FIG. 3, the opening 12b is provided at the lower portion of the case 12, but this is for the second embodiment described later, and it is better not to provide the opening 12b in the first embodiment.
The operator device 10 allows the operator to manually move the operator portion 14 while holding the knob 11. However, the operator device 10 can be used to remove a string member (for example, a belt) that is stretched around a pulley with power from a motor (not shown). It is also possible to automatically move the operation unit 14 via

A gray code pattern 30 is formed on the inner surface of the case 12 that faces the movement locus of the photosensor unit 20. The gray code pattern 30 is a pattern as shown in FIG. 9, and is composed of a plurality of rows of shade patterns formed with a pitch of ²ⁿ times the minimum pitch (n = 0, 1, 2,...). In the example shown in FIG. 9, the first column 31 is twice the minimum pitch (n = 1), the second column 32 is four times the minimum pitch (n = 2), and the third column 33 is eight times the minimum pitch ( n = 3), the fourth row 34 is 16 times (n = 4) the minimum pitch, and the fifth row 35 is 32 times (n = 5) the minimum pitch.

This shaded portion (banded portion with hatching) represents a binary code of “1”, and a thin portion (blank portion) represents “0”. This gray code pattern 30 has an arrangement direction of each column. The 5-bit 2-code (gray code / alternate binary code) is configured by the shading at each pitch position, and the gray code changes by 1 bit each time it moves by 1 pitch. In the example of FIG. 9, when the gray code at each pitch position is converted into a decimal number, 0 to 31 are represented.
The photosensor unit 20 includes five reflective photosensors including five sets of light emitting diodes and photodiodes, and each of the reflective photosensors is in each of the first column 31 to the fifth column 35 of the gray code pattern 30. The light / dark pattern of the column is detected as dark: “1” and light: “0”.

Therefore, the position when the operation unit 14 shown in FIG. 1 is moved can be recognized by the detection value of the gray code pattern 30 by the photo sensor unit 20 which is a position sensing unit. Parameters can be set.
FIG. 9A shows detection values when the gray code pattern 30 is correctly detected at all pitch positions .

However, if dust adheres between the gray code pattern 30 and the photo sensor unit 20 and the gray level at a certain pitch position in any row of the gray code pattern 30 cannot be detected correctly, for example, FIG. As shown in (B). In this example, the “dark“ 1 ”” of the eleventh bit E from the left in the third column 33 is erroneously detected as “light“ 0 ”” due to the bit disappearance, and the gray code becomes “01011”. Therefore, 2 bits are changed with respect to the gray code “01101” at the previous pitch position, and “13” is detected after “9” in decimal.
According to the present invention, such a malfunction is immediately recognized and a warning signal is generated, thereby prompting the first embodiment to assist in improving the malfunction of the operating device, that is, prompting cleaning.

With reference to FIG. 1, the circuit configuration and operation of warning signal generating means for this purpose will be described. The portion indicated by the broken line in FIG. 1 is a portion relating to the second and third embodiments, and will be described later.
This circuit includes a change detection circuit 41, a delay circuit 42, a different code conversion circuit 43, two latch circuits 44 and 45, a malfunction determination circuit 46, a selector 47, an AND gate 48, and a cleaning instruction section 49. The different code conversion circuit 43 is a converter that converts a gray code into, for example, a decimal number, but may be converted into a binary code or a hexadecimal code.
The utilization circuit 50 is a circuit that is originally provided in the mixer. Information on the position of the operation unit 14 detected by the photosensor unit 20 described above with reference to FIG. 3 of each of the plurality of operation unit devices 10 illustrated in FIG. This is a circuit that inputs and sets electrical parameters related to the functions (pan, volume, left / right balance, etc.) of the corresponding channels.

  A detection value (5-bit gray code) of the position of the operation unit 14 detected by the photosensor unit 20 during the movement of the operation unit 14 with respect to the case 12 which is the fixed unit shown in FIG. Are latched in the latch circuit 44 and input to the input terminal B of the selector 47, and the previous detection value latched in the latch circuit 44 is input to the input terminal A of the selector 47. The selector 47 normally outputs the detection value of the input terminal B and inputs it to the utilization circuit 50. The utilization circuit 50 sets an electrical parameter of a predetermined function of a channel assigned to the operation device 10 according to the detected value.

  When the detection value (gray code) from the operation device 10 changes, the change detection circuit 41 detects it and outputs “1”, and the delay circuit 42 slightly delays it (for example, 10 μs), A latch signal is given to the latch circuit 45 and one input signal of the AND gate 48 is used. The AND gate 48 is opened when the malfunction detection signal c is not output from the malfunction determination circuit 46 ("0" is input to the negative logic input terminal), and the latch signal output from the delay circuit 42 is output. Is supplied to the latch circuit 44. When the malfunction detection signal c is output (becomes "1"), the gate is closed and the latch signal output from the delay circuit 42 is not passed.

  The malfunction determination circuit 46 takes in the output from the change detection circuit 41 as an enable signal, so that the difference from the input a exceeds “1” only when the input b changes (| ab−>). 1) Determine whether or not, and if it exceeds, output a malfunction detection signal c (set to “1”). This malfunction determination circuit 46 also has an output latch function, and when the next determination detects "normal" where the difference between the inputs a and b is 1 or less, the latch is released and the output malfunction detection signal c is output. Return to “0”. The detection value (gray code) output from the operator device 10 is converted into a decimal number by the different code conversion circuit 43 and input to the latch circuit 45 and also to the input b of the malfunction determination circuit 46. On the other hand, the decimal number latched by the latch circuit 45 becomes the input a of the malfunction determination circuit 46. This malfunction detection signal c is a warning signal.

  Therefore, when the gray code from the operator device 10 changes from a certain value to, for example, “01101”, the change detection circuit 41 outputs “1”, and the delay circuit 42 delays by about 10 μs and the latch signal is sent to the latch circuit 45. The data is output to the latch circuit 44 through the AND gate 48. Thereby, the latch circuit 44 latches the detection value “01101” inputted at that time, and the latch circuit 45 latches “9” converted into the decimal number by the different code conversion circuit 43. If “8” has been latched in the latch circuit 45 until just before that, only after the output of the different code conversion circuit 43 becomes “9” until the latch circuit 45 latches it (about 10 μs). Although the input a of the malfunction determination circuit 46 is “8” and the input b is “9”, | a−b | = 1 and does not exceed 1, so the malfunction determination circuit 46 detects the malfunction detection signal (warning signal) c. Is not output.

Therefore, the selector 47 outputs the current detection value “01101” input to the input terminal B to the utilization circuit 50 because the terminal SA is “0”, and the utilization circuit is assigned to the operation device 10 accordingly. Set the electrical parameters for a specific function of a given channel.
Next, when the gray code from the operator device 10 changes to “01011” in which the third bit is erroneously detected as shown in FIG. 9B, “13” is output from the different code conversion circuit 43. Since the input b of the malfunction determination circuit 46 changes to “13” and the input a remains “9” for at least about 10 μs, | a−b | = | 9−13 | = 4> 1 The malfunction determination circuit 46 outputs a malfunction detection signal c ("1") (first step).

The malfunction detection signal c is input to the cleaning instructing unit 49, thereby causing the LCD 6 shown in FIG. 2 to display a message indicating the type of the operator device and a message prompting it to be cleaned, or causing an optical flicker. Alternatively, a warning sound (may be a simple beep) may be generated by a buzzer or an oscillator (not shown) to encourage improvement of malfunction of the operator device (second step).
When the malfunction detection signal c (“1”) is output, the gate of the AND gate 48 is closed, and even if a latch signal is output from the delay circuit 42, it is not input to the latch circuit 44. Remains latched with the previous detection value “01101”.

The malfunction detection signal c (“1”) is input to the SA terminal of the selector 47, and the selector 47 selects the previous normal detection value “01101” from the latch circuit 44 input to the input A. Then, the output is continued to the utilization circuit 50.
Incidentally, the malfunction determination circuit 46 becomes a = b = 13 after 10 μs when b = 13 and a = 9 are taken in at the input, but at this time, since no enable signal is generated, c = 10 μs remains unchanged. 1 is output.

Thereafter, when the detected value of the operation device 10 becomes the normal gray code “01110” at the next pitch position, the input b of the malfunction determination circuit 46 becomes the decimal number “11”, but the input a is input to the latch circuit 45. Since “9” remains “9” until “11” is latched, | a−b | = | 9−11 | = 2, and since it still exceeds “1”, the malfunction detection signal c is continuously output.
Accordingly, the selector 47 also continues to select and output the two previous normal detection values “01101” from the latch circuit 44 input to the input terminal A to the utilization circuit 50.

Before and after 10 μs, as described above, the malfunction determination circuit 46 continues to output c = 1.
Next, when the detected value of the operation device 10 becomes the normal gray code “01010” at the next pitch position, the input b of the malfunction determination circuit 46 becomes the decimal number “12”, but the input a is the latch circuit 45. Since “12” remains “11” until “12” is latched, | a−b | = | 11−12 | = 1, and since “1” is not exceeded, the malfunction detection signal c is not output (“ 0 ”).

  At this time, the normal gray code “01010” of this time is also input to the input terminal B of the selector 47 and the selector 47 is input to the input terminal B when the malfunction detection signal c becomes “0”. The normal detected value “010101” is selected and output to the utilization circuit 50. When a latch signal is output from the delay circuit 42, the latch circuit 45 latches the current decimal number “12” and also inputs the latch signal to the latch circuit 44 to latch the current detection value “010101”. To do.

  In this way, the malfunction determination circuit 46 outputs the malfunction detection signal c only during the period from when the operator device 10 erroneously detects the occurrence of the bit disappearance of the gray code until the second normal value is detected thereafter. The cleaning instruction unit 49 is instructed to prompt the operator device to be cleaned, and is urged to support the improvement of malfunction. In the meantime, the selector selects a normal detection value immediately before erroneous detection. That is, when a warning signal is generated, an abnormal detection value is not output to the utilization circuit 50 as it is, but is corrected to a value close to normal and then output to the utilization circuit 50. Therefore, the setting of electrical parameters in the utilization circuit 50 is greatly shifted. Can not be.

1 are provided for the plurality of operation device 10 shown in FIG. 2, and detection values (gray codes) output from the selectors 47 are provided. Is input to the utilization circuit 50, and the function of each corresponding channel according to information (gray code) indicating the position of the operation unit 14 detected by the photosensor unit 20 described above with reference to FIG. Set electrical parameters for.
Further, when any malfunction detection circuit 46 corresponding to each operator device 10 outputs the malfunction detection signal c, the malfunction detection signal c is input to the cleaning instruction section. Accordingly, as described above, the LCD 6 shown in FIG. 2 displays the type of the operator device and a message prompting it to be cleaned, causes an optical flicker, emits a warning sound, and so on. Encourage them to help improve the malfunction of slave devices.

  The operator activates a built-in cleaning unit (to be described later) to eject the high-pressure air or vibrate the sensor substrate with respect to the operator device whose cleaning is urged by the display on the LCD 6 or the operator device that has just been operated. The photo sensor unit 20 shown in FIG. 3 is grayed by cleaning or blowing high-pressure air from the outside through the slit 12a (FIG. 3), or by vibrating the vibrator vibrator against the operation device 10. The dust between the code pattern 30 and the like can be removed for cleaning.

[Second Embodiment: FIGS. 1 to 3 and FIG. 9]
Next, a second embodiment of the present invention will be described with reference to FIGS. 1 to 3 and FIG. These drawings are the same as those in the first embodiment. In the second embodiment, a cleaning unit 60 indicated by a broken line is provided instead of the cleaning instruction unit 49 in FIG. As an example, the only difference from the first embodiment is that a high-pressure air injection mechanism is provided below the operator device 10 in FIG. Only this difference will be described below.

In the second embodiment, when the malfunction determination circuit 46 in FIG. 1 outputs the malfunction detection signal c, it is input to the cleaning unit 60, and the cleaning unit 60 is activated to supply high-pressure air into the corresponding operator device 10. Spray to clean.
FIG. 3 shows an example in which a high-pressure air injection mechanism is provided as a cleaning unit 60 below the operation device 10.

  In this example, two linear motor guide rods 62 (only one is visible in FIG. 3) in the front side of the main body 2 of the mixer 1 shown in FIG. The nozzle holder 64 with a linear motor holding the nozzle 63 on the operating device 10 side is slidably supported by the linear motor guide rod 62. In this linear motor guide rod 62, stop position information by magnetism or the like is written. ) The nozzle holder 64 with a linear motor is driven by a command from a control unit (not shown), and is moved at a high speed in the direction indicated by the arrow A or B. Stop. The nozzle 63 held by the nozzle holder 64 is connected to a compressor 68 via an expandable / contractible spiral tube 66 and a cock 67. The compressor 68 is driven by a motor 69 and sucks and compresses outside air through the filter 70.

In this embodiment, when a malfunction detection signal c is input from the malfunction determination circuit 46 of FIG. 1 to the cleaning unit 60, the motor 69 shown in FIG. 3 starts and drives the compressor 68 to create compressed air. The linear motor of the nozzle holder 64 with a linear motor is driven, and the nozzle holder 64 is moved from the initial standby position to the lower position of the operation device 10 in which a malfunction has occurred.
When the air in the compressor 68 reaches a predetermined pressure, the cock 67 (which can be opened and closed by an electric signal by an electromagnetic cock) is opened, and high-pressure air is sent to the nozzle 63 through the spiral tube 66, and the operation device 10 is supplied from the nozzle 63. It injects in case 12 through opening 12b.

At this time, the operation section 14 is returned to the initial position of one end in the operation apparatus 10 (for example, the position where the detection value becomes “0”), and high pressure air from the nozzle 63 is injected there. By doing so, dust and the like between the photo sensor unit 20 and the gray code pattern 30 can be efficiently removed.
Further, the nozzle holder 64 with a linear motor can be moved together with the linear motor guide rod 62 in the longitudinal direction of the operation device 10 (direction perpendicular to the paper surface in FIG. 3), and the nozzle 63 is moved in that direction. However, high pressure air may be injected.
When the cleaning operation is completed, the nozzle holder 64 with a linear motor is driven again to return to the standby position.

[Third embodiment: FIGS. 1, 2, 4 to 9]
Next, a third embodiment of the present invention will be described with reference to FIGS. 1, 2 and 9 and new FIGS. 1, FIG. 2 and FIG. 9 are common to the first and second embodiments described above. In FIG. 1, a cleaning unit 60 is provided instead of the cleaning instruction unit 49, as in the second embodiment described above. In the third embodiment, the cleaning unit 60 vibrates the sensor substrate 17 ′ of the operation unit 14 to remove dust and the like attached to the photosensor unit 20.

  Therefore, the operator device 10 of this embodiment is configured as shown in FIGS. 4, the same parts as those of the operator device 10 shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 5 which is a front view of the operating element portion seen from the cross-sectional direction along the line CC in FIG. 4, the sensor substrate 17 'of this embodiment has a cantilevered sensor support piece portion 17a at the center portion. The remaining substantially circular cut-out portion 17b is formed. And the piezoelectric vibrating body which consists of the circular metal plate 76 which fixed the piezoelectric element 75 on the upper surface is affixed on this sensor support piece part 17a.

On the piezoelectric element 75 of the piezoelectric vibrating body, a photosensor unit 20 including n reflection type photosensors PS including n light emitting diodes and photodiodes (n = 5 in this example) is gray as a position sensing unit. It is attached so as to face the code pattern 30.
As shown in FIG. 6, the sensor substrate 17 ′ is formed with through holes 17 c having a diameter larger than the diameter of the set screw 19 at four corners, and both sides of the portion are sandwiched between elastic rings 21 and 22. It is attached to the moving body 15 and can vibrate easily.

As shown in FIG. 7, the cleaning unit 60 of this embodiment includes a waveform shaping circuit 71, a timing correction circuit 72, a cleaning signal formation circuit 73, a drive circuit 74, a piezoelectric element 75 of a piezoelectric vibrating body that is a vibration unit, The operation detection circuit 76 is also configured.
The operation of this embodiment will be described with reference to the timing chart of FIG. When a malfunction occurs in any of the operator devices 10, the malfunction detection signal c is input from the corresponding malfunction determination circuit 46 (FIG. 1) to the waveform shaping circuit 71, and becomes a pulse signal d having a constant pulse width. Input to the correction circuit 72.

  Here, while the operation detection circuit 76 detects that the operation device 10 is being operated, the pulse signal d is delayed by the detection signal h, and when the operation of the operation portion 14 is finished, the operation detection circuit 76 no longer outputs the detection signal h, whereby the timing correction circuit 72 outputs the pulse signal e. In FIG. 8, τ is a delay time until the operation of the operation unit 14 is completed. When the pulse signal e is input, the cleaning signal forming circuit 73 outputs a plurality (for example, three in this example) of rectangular wave pulses f having a pulse width of 1.0 sec at intervals of 0.5 sec, as shown in FIG. . Accordingly, the drive circuit 74 outputs a low-frequency AC signal g of about 20 Hz to the piezoelectric element 75 and vibrates the piezoelectric element 75 only while the rectangular wave pulse f is input. As a result, the sensor support piece 17a of the metal plate 76 and the sensor substrate 17 'vibrates together with the photosensor unit 20 as the position sensing unit, and the gray code pattern 30 is caused by dust adhering to the photosensor unit 20 and the wind pressure caused by the vibration. Also remove any trash attached to the.

A selection circuit is provided between the drive circuit 74 and each piezoelectric element 75 in each of the plurality of operation device 10 so that the waveform shaping circuit 71 to the drive circuit 74 can also be used for each operation device 10. Thus, it is preferable to output the low-frequency AC signal g to the piezoelectric element 75 in the operation device 10 in which the malfunction has occurred.
According to this embodiment, it is only necessary to provide a piezoelectric element in the operating device 10, and it is not necessary to provide a mechanism member outside the operating device, and each operating device has a relatively simple circuit for vibrating the piezoelectric element. Therefore, it is possible to provide a small and inexpensive cleaning unit.

  When the operation unit 14 is moved in the operation unit 10 shown in FIG. 3 and FIG. 4, an error in the gray code detection value detected by the photo sensor unit 29 is determined, and a malfunction detection signal as a warning signal is output. In addition, the embodiment in which the warning signal generating means for correcting the erroneously detected detection value and outputting it to the utilization circuit is realized by the hardware circuit has been described with reference to FIG. 1, but the warning signal generating means similar to that is shown in FIG. An embodiment in the case of realization by software processing according to will be described with reference to the flowchart of FIG. In this flowchart, each step is abbreviated as “S”.

In this process, for example, a microcomputer for controlling the mixer 1 shown in FIG. 2 performs, for example, a parameter setting for each channel and an assignable process for each channel of a specific parameter in a main routine (not shown). Sometimes, a time interrupt is generated and executed at a constant short time interval (for example, every 10 μs).
First, in step 1, the operation state of each operator device 10 is scanned. Then, in step 2, it is checked whether or not any of the operation device 10 has moved (change in detected value) within a predetermined time. If there is any movement, the process proceeds to step S3, and if not, the process returns to the main routine.

  Here, the predetermined time is, for example, 0.8 seconds, and if there is a change in the detected value of the Goule code indicating the movement of the operation device 10 within this time, it is considered that there is a continuous movement. Therefore, if there is a change in the detected value from each operating device 10, a new timer interrupt is generated and a timer flow process (not shown) is started. If the detected value from the same operator device 10 does not change within 0.8 seconds, the timer operation is terminated. If there is a change within 0.8 seconds, it is determined that there is movement in step 2 of FIG. 10, and the timer of the timer flow is reset and restarted. That is, the timer functions as a retriggerable timer.

  When it is determined in step S2 in FIG. 10 that there is a movement within a predetermined time and the process proceeds to step 3, the state (detection value) of the operating device that has moved is the difference between the current detection value and the previous detection value “1”. It is determined whether or not (| current value−previous value |> 1). In the normal detection state, the detection value of the gray code changes by “1” in decimal, so this difference is “1” and does not exceed “1”. After the current value, which is the detected value, is output to the utilization circuit, the current value is stored as the previous value in step 13 and the process returns to the main routine.

  If the state (detected value) of the operating device that has moved is abnormal due to bit disappearance or the like, the detected value changes by 2 bits or more with respect to the previous value and changes by 2 or more in decimal. Therefore, since | current value−previous value |> 1, the process proceeds from step 3 to step 4. In step 4, it is determined whether or not the aforementioned malfunction detection signal c, which is a warning signal, is “1”. If it is not “1” (if it is “0”), a malfunction occurs for the first time, and the process proceeds to step 5. Then, the malfunction detection signal c is set to “1”, and the previous value which is the previous detection value is stored in step 6. Then, after the stored value is output to the utilization circuit in step 12, the current value is stored as the previous value in step 13, and the process returns to the main routine.

  If it is determined in step 4 that the malfunction detection signal c is “1”, the malfunction detection signal c has already been output, and the process proceeds to step 7. Then, the state (detection value) of the operating device that has moved determines whether the difference between the current detection value and the stored value is D (| current value−stored value | = D). The initial value of D is “2”. If | current value−stored value | = 2, after detecting the abnormal value once and setting it to the malfunction detection signal c “1”, the normal value is detected this time and the difference from the stored value (previous detection value) Can be determined to be “2”, the process proceeds to step 9 where the malfunction detection signal c is set to “0”, and when D is “3” or more in step 10, the initial value is set to “2”. return. Then, the process proceeds to step 11 to output the current value, which is the current detected value, to the utilization circuit, and then performs the process of step 13 and returns to the main routine.

If it is determined in step 7 that | current value−stored value | = D (initially “2”), the abnormal value is detected and the malfunction detection signal c “1” is detected again. It is determined that the process is continued, and the process proceeds to step 8 where D is incremented by 1 (or “3” if it is the first time). In step 12, the stored value is output to the utilization circuit, the process in step 13 is performed, and the process returns to the main routine.
After that, there is the same movement of the operator device again in step 2, and in step 3, | current value−previous value |> 1, and in step 4, c = 1 and proceed to step 7. | current value−stored value | = D If it becomes, it will be judged that it returned to the normal detection value, and it will progress to step 9-11. If the value of D at that time is “3”, it returned to normal at the third detected value after the occurrence of an abnormality, and if the value of D was “4”, it returned to normal at the fourth detected value after the occurrence of the abnormality. become.

  According to this embodiment, even if the gray code detection value is abnormal during operation of the operator device, the malfunction detection signal c, which is a warning signal, is set to “1” only in the section where the abnormal value occurs. The detected value immediately before the occurrence of the abnormal value is output as a stored value to the utilization circuit instead of the current value, and when the detected value returns to a normal value, the malfunction detection signal c is immediately returned to “0”. A new detection value can be output to the utilization circuit.

  As mentioned above, the embodiment in which the present invention is applied to the mixer has been described. However, the present invention is not limited to this, and a partially open type operation in which the operating section moves with respect to the fixed section to set electrical parameters. The present invention can be applied to various electronic devices such as an electronic instrument such as an electronic organ and an electronic piano, audio equipment, video equipment, and a dimmer equipped with at least one child device (either manual operation or automatic operation).

  The present invention can be used in various electronic devices including at least one partially open type operating device that moves an operating portion relative to a fixed portion to set an electrical parameter. Since the position of the operating element is optically detected using a gray code, information on the absolute position of the operating element can be obtained as a digital signal in a non-contact manner. When the gray code is erroneously detected, it is immediately recognized to prompt the operator device to clean or automatically clean it to remove the dust that caused the false detection. , Can return to normal state.

It is a block diagram which shows the circuit structure of the warning signal generation means concerning this invention of the mixer shown in FIG. It is a perspective view which simplifies and shows the external appearance of the mixer which is an example of the electronic device which implemented the operating device apparatus malfunction improvement support method by this invention. It is a figure which shows the structural example of the cross section of the operation element apparatus (1st, 2nd Example) in FIG. 1, and the cleaning part 60 (2nd Example). It is a cross-sectional view which shows the other structural example (3rd Example) of the operation element apparatus in FIG.

It is a front view of the operation element part seen from the cross-sectional direction in alignment with CC in FIG. It is an expanded sectional view which follows the XX line in FIG. It is a block diagram which shows the structural example of the cleaning part 60 (3rd Example) in FIG. It is a timing chart which similarly shows the signal waveform of each part. It is explanatory drawing which shows the relationship between the gray code pattern 30 in FIG. 3 and FIG. 4, its each detected value, and a decimal number. 5 is a flowchart of an embodiment in which the warning signal generating means according to the present invention is realized by software processing by a microcomputer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mixer (electronic device), 2 ... Main body, 3 ... 1st operation panel part, 4 ... 2nd operation panel part, 6 ... Liquid crystal display (LCD), 10 ... Operator device, 11 ... Knob, 12 ... Case , 12a ... slit, 12b ... opening, 13 ... slide shaft, 14 ... operating element, 15 ... moving body,
DESCRIPTION OF SYMBOLS 16 ... Projection piece, 17, 17 '... Sensor board | substrate, 17a ... Sensor support piece part, 17b ... Cut-out part, 17c ... Through-hole, 18 ... Spacer, 19 ... Set screw, 20 ... Photo sensor unit, 21, 22 ... Elasticity Ring, 30 ... Gray code pattern, 31 ... First row, 32 ... Second row, 33 ... Third row, 34 ... Fourth row, 41 ... Change detection circuit, 42 ... Delay circuit, 43 ... Different code conversion circuit, 44, 45 ... Latch circuit, 46 ... Malfunction determination circuit, 47 ... Selector, 48 ... Gate circuit, 49 ... Cleaning instruction unit, 50 ... Use circuit, 60 ... Cleaning unit, 62 ... Guide rod, 63 ... Nozzle, 64 ... Nozzle Holder, 66 ... Spiral tube, 67 ... Cock, 68 ... Compressor, 69 ... Motor, 70 ... Filter, 71 ... Waveform shaping circuit, 72 ... Timing signal forming circuit, 73 ... Clear Training compensation circuit, 74 ... drive circuit, 75 ... piezoelectric element, 76 ... operation in the detection circuit

Claims (5)

An operation device that supports improvement of malfunction of the operation device in an electronic device having at least one partially opened operation device that moves an operation portion relative to a fixed portion to set an electrical parameter. A malfunction improvement support method,
The position of the operation unit portion of the operation device is optically detected using a gray code,
Each time the detected value of the position of the operating portion changes during the movement of the operating portion relative to the fixed portion, the previous and current values are compared, and if the difference exceeds a predetermined value, it is determined as a malfunction. A first step of outputting a normal detection value immediately before the determination of the malfunction as a detection value of the position of the operation unit to a utilization circuit for setting the electrical parameter until it is determined that the malfunction does not occur ;
It recognizes that it is determined that the malfunction in the first step and malfunction of the operator device, operator, characterized in that it consists of a second step of prompting to help improve malfunction of the operator device device malfunctions improved Support method. In an electronic apparatus provided with at least one or more partially-open type operating device device in which an operating device portion moves relative to a fixed portion to set an electrical parameter.
The position of the operation unit portion of the operation device is optically detected using a gray code,
Each time the detected value of the position of the operating portion changes during the movement of the operating portion relative to the fixed portion, the previous and current values are compared, and if the difference exceeds a predetermined value, it is determined as a malfunction. After that, until it is no longer determined to be a malfunction, a normal detection value immediately before the determination of the malfunction is output as a detection value of the position of the operation unit to a utilization circuit for setting the electrical parameter and a warning signal is generated Warning signal generating means for
An electronic apparatus comprising: cleaning instruction means for prompting cleaning of the operation device by a warning signal generated by the warning signal generation means. In an electronic apparatus provided with at least one or more partially-open type operating device device in which an operating device portion moves relative to a fixed portion to set an electrical parameter.
The position of the operation unit portion of the operation device is optically detected using a gray code,
Each time the detected value of the position of the operating portion changes during the movement of the operating portion relative to the fixed portion, the previous and current values are compared, and if the difference exceeds a predetermined value, it is determined as a malfunction. After that, until it is no longer determined to be a malfunction, a normal detection value immediately before the determination of the malfunction is output as a detection value of the position of the operation unit to a utilization circuit for setting the electrical parameter and a warning signal is generated Warning signal generating means for
An electronic apparatus comprising: cleaning means for cleaning the operating device by a warning signal generated by the warning signal generating means.   The electronic device according to claim 3, wherein the cleaning unit is a unit that performs cleaning by injecting air into the operation device.   The electronic device according to claim 3, wherein the cleaning unit includes a vibration unit that vibrates a position sensing unit that detects a position of the operation unit of the operation unit.

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