JP3330003B2 - Electronic equipment adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting device for an electronic device for adjusting an adjusting device having variable electric characteristics and adjusting characteristics of an electronic device including the adjusting device.

[0002]

2. Description of the Related Art In electronic devices such as a compact disk reproducing device and a mini disk reproducing device, it is necessary to adjust the characteristics of a pickup for irradiating a laser beam to a disk for each device. The characteristics to be adjusted include, for example, focus and tracking of the pickup. Focusing is the adjustment of the focal point of the laser beam applied to the disk, and is adjusted so that the focal point coincides with the recording surface of the disk. Tracking is an operation in which a laser beam applied to a disk follows a track set on the disk, and the focal point of the applied laser beam is adjusted so as to always follow the center line of the track.

[0003] The above-mentioned reproducing apparatus incorporates an adjusting apparatus whose electric characteristics are variable. The focus and tracking of the pickup of the playback device are adjusted by adjusting the electrical characteristics of the adjustment device. The electrical characteristics of the adjustment element can be changed by a mechanical operation that moves a movable member such as a rotary knob of the adjustment element.

In the manufacturing process of the conventional reproducing apparatus, the characteristics such as the focus and tracking of the pickup of the reproducing apparatus are adjusted by manually moving the movable member of the adjusting element by an operator. At this time, the worker first measures the level of the inspection output indicating the characteristic at that time while moving the movable member within the usable range of the movable member of the adjustment element. The usable range is a range in which the movable member can be moved, and is a range in which the characteristics of the adjustment element can be adjusted by moving the movable member. Next, the movable member is adjusted and fixed at a position indicating an inspection output at a level closest to a predetermined target level within the movable range.

Thus, the characteristics of the adjustment element are determined. The target level is, for example, a predetermined level of the inspection output of the characteristic of the electronic device to be measured. Further, the final drive position where the movable member is fixed may be a position where the measured inspection output indicates the maximum level or the minimum level.

At this time, noise generated in the electronic device to be adjusted is superimposed on the inspection output of the characteristic measured within the movable range, and the inspection output may fluctuate in time. . As a result, for example, the maximum or minimum level of the inspection output, or the position of the movable member at which the inspection output indicates a predetermined level may not be accurately determined. Therefore, the final adjustment position of the movable member cannot be accurately determined.

In the conventional adjustment process, the final adjustment position of the movable member is determined based on intuition based on the experience of the operator. For this reason, depending on the skill level of the worker,
Adjustment mistakes that cannot be made properly may occur. In addition, since the worker manually works on each electronic device, the work time in this adjustment process becomes longer.

A conventional technique for adjusting such an adjusting element having variable electric characteristics is disclosed in Japanese Patent Application Laid-Open No. 62-1345.
No. 69, and Japanese Patent Application Laid-Open No. 7-40160, respectively.

Japanese Unexamined Patent Publication No. 62-134569 discloses a technique for automatically measuring the electrical characteristics of an adjustment board including an adjustment element. In the automatic measuring device of the present invention, an electronic circuit whose characteristics are changed by rotating and moving the adjuster of the adjustment element is incorporated in the adjustment substrate. When it is desired to set the characteristics of the electronic circuit to a predetermined state, the characteristics of the electronic circuit are measured while moving the adjuster of the adjustment element by, for example, an angle of 1 degree using a pulse motor or the like, and the value is stored in a memory. Store. One coordinator
When rotated, a graph showing the change in the characteristics of the electronic circuit accompanying the movement of the adjuster is visually displayed by the display means. The result of the automatic measurement is compared with a predetermined target value to obtain a difference between the measured value and the target value. Based on this difference, the necessary adjustment amount of the adjustment element is calculated, and the adjustment element is rotated and fixed by the calculated amount. Thereby, the automatic adjustment of the adjustment substrate is performed.

In the automatic measuring device, it is assumed that the amount of rotation of the adjuster of the adjusting element corresponds to the rotation output given to the pulse motor for rotating the adjuster. At this time, when the power transmission unit that transmits the torque of the pulse motor to the adjustment element uses a combination of a plurality of gears,
When the rotation direction of the pulse motor is reversed, a backlash of these gear groups causes a deviation between the output of rotation and the actual rotation amount of the adjuster.

When the motor is a DC motor or the like, the rotation amount of the motor is measured by a measuring device called a rotary encoder. The encoder is mounted, for example, on a transmission device that transmits the rotation of the motor to the adjuster of the adjustment element. This transmission device is realized by a combination of a plurality of gears, and the rotation of the motor sequentially rotates the gears to adjust the speed. The encoder is mounted on a separate gear for transmitting the rotation of the motor to the gear to which the driver is fixed, rather than to the driver that rotates by directly contacting the adjuster and the gear to which the driver is fixed. There is.

It is assumed that the amount of rotation of the gear on which the encoder is mounted corresponds to the amount of rotation of the gear on which the driver is mounted. When the motor is rotated forward and backward, the gears are also rotated forward and backward correspondingly. At this time, the backlash of the gears causes a difference in the amount of rotation between the gears to which the driver is fixed and the gears to which the encoder is fixed. Therefore, a deviation occurs between the actual rotation amount of the adjustment value of the adjustment element and the measured rotation amount. Therefore, the adjustment result of the electronic device deviates from the target value by an amount corresponding to the deviation of the adjustment value of the adjustment element.

JP-A-7-40160 discloses that
An adjustment method and apparatus for an electronic component having an adjustment knob that can be rotated by 60 ° is disclosed. In this electronic component adjustment device, the electrical value of the electronic component is measured while rotating the adjustment knob at a predetermined rotation angle step. The adjustment device first adjusts the adjustment knob of the electronic component by 360 °
By rotating the electronic component, the electrical value of the electronic component at each rotation angle step is measured. Based on the measurement result, the vicinity of the rotation angle step closest to the predetermined target value in the measurement result is measured again with the resolution of each rotation angle step smaller than in the first measurement. Such measurement is repeated a plurality of times while narrowing the measurement range and reducing the resolution of the rotation angle step. Thereby, the electric value of the electronic component is set to the target value. In such an adjustment device, measurement is performed a plurality of times while reducing the resolution of the rotation angle step. Therefore, the number of measurements is large and the adjustment takes time.

In another conventional adjusting device for automatically adjusting an adjusting element, the characteristic is adjusted by rotating the adjusting element by operating means such as a driver. As shown in FIG. 13, the adjustment element 2 is attached to the adjustment board 1, for example, on the lower surface in the vertical direction. The adjuster of the adjusting element 2 is fixed to, for example, the rotating member 3 and moves in the circumferential direction of the rotating member 3 as the rotating member 3 rotates. The tip of the driver 5 which is the tip of the power transmission unit connected to the pulse motor is fitted into the groove 3a of the rotating member 3 so as to be fitted therein. The driver 5 rotates in response to the rotation of the motor, and rotates the rotating member 3. Thereby, the rotational force of the motor is transmitted to the adjustment element 2.

[0015]

When the adjustment is performed using the above-described driver 5, the center line 4 of the rotating member 3 and the center line 6 of the driver 5 are displaced at this time, and the driver 5 is disengaged from the groove 3a. May be obliquely stuck. At this time,
The engagement between the groove 3a and the tip portion of the driver 5 causes rattling, and the rotational force of the motor is not transmitted to the adjusting element 2 reliably. When the driver 5 is removed from the state where the adjustment is completed and the driver 5 is obliquely engaged with the groove 3a, the driver 5 is moved in the downward direction indicated by the arrow 8. At this time,
The driver 5 may touch the side surface of the groove 3a of the rotating member 3 and rotate the rotating member 3 by mistake. As a result, the rotating member 3 may rotate to move the adjuster, and the position of the adjuster may deviate from the adjusted position.

An object of the present invention is to provide an adjustment apparatus for an electronic device which adjusts the characteristics of an adjustment element having variable electric characteristics and automatically adjusts the characteristics of an adjustment board including the adjustment element and electronic equipment. An object of the present invention is to provide an adjusting device capable of shortening the adjusting time and performing highly accurate adjustment.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

According to the present invention, there is provided an adjusting device for an electronic apparatus having (a) an electronic circuit element capable of adjusting an electric characteristic by a displacement operation of an operating member. Level measuring means for measuring the level of the electric signal output from the electronic circuit including the electronic circuit element or the electronic circuit element; and (c) engaging with the operating member to determine a predetermined one-way movement direction and the one-way movement direction. A drive means for driving the operation member in the reverse direction; (d) a position detection means provided in connection with the drive means for detecting a drive position corresponding to the displacement position of the operation member; and (e) a level measurement means. And control means responsive to the output of the position detecting means, the displacement being a maximum level or a minimum level of the electric signal to be measured and corresponding to the adjustment level of the electronic circuit element to be adjusted Within a predetermined displacement range of the operating member including the position, the operating member is driven to be displaced in the one movement direction by the driving means, and the level of the electric signal detected by the level measuring means and the driving position detected by the position detecting means Are stored in the memory in correspondence with each other, a drive position corresponding to the maximum level or the minimum level of the electric signal stored in the memory is obtained, and the drive position detected by the position detection means and the operation member The operation member is operated until the output of the position detection means representing a position exceeding the drive position corresponding to the local maximum level or the local minimum level of the electric signal by a value equal to or more than the error along the one movement direction between the displacement position and the displacement member is obtained. Then, the level of the electric signal is measured by the level measuring means while the operating member is displaced and driven in the one movement direction by the driving means again. The position where the level of the electric signal detected by the level measuring means is equal to or higher than the maximum level or equal to or lower than the minimum level, the latest measurement result of the electric signal level and the past measurement of the electric signal level When the value of the difference from the result changes from a positive value to a negative value or changes from a negative value to a positive value, or when the output of the position detecting means becomes the driving position corresponding to the maximum level or the minimum level A control unit for driving the operation member to be displaced in the one movement direction by a driving unit until any one of the states is reached. According to the present invention, the adjustment device of the electronic device adjusts the characteristics of the electronic circuit element whose characteristics are variable to adjust the electrical characteristics of the electronic device.
The characteristics of the electronic circuit element can be changed by external physical operation. For example, when an electronic circuit element is a variable resistor, its resistance value moves by rubbing against a resistor to which one terminal of the element is connected, and changes according to the position of a regulator to which the other terminal of the element is connected. Is done. The adjustment device of the electronic device includes an operation member. The operating members are
The portion of the electronic circuit element that is physically displaced in direct contact with the electronic circuit element is displaced in the one movement direction or the other movement direction opposite to the one movement direction. by this,
The characteristics of the electronic circuit element are changed. The operating member has, for example, a driver-like form, and the displacement portion of the electronic circuit element has a groove into which the tip of the operating member fits. The operating member has its tip fitted into this groove to transmit rotation.
There is play in the engagement between the groove and the tip, and when the rotation direction of the operation member is reversed, the rotation amount of the operation member and the rotation amount of the displacement portion of the electronic circuit element are equal to the play of the engagement. Misalignment occurs. The operating member is driven to be displaced by driving means connected via a speed reducer comprising a plurality of gears, for example. The displacement position at which the operation member is driven to be displaced is detected by the position detecting means. Although the drive position output from the position detection means is a position corresponding to the displacement position of the operation member, an error may occur between the displacement position and the displacement position depending on the configuration of the position detection means. For example, when the driving means has a configuration for transmitting the rotational force of the motor to the operating member via a speed reducer including a plurality of gears, the rotary encoder serving as the position detecting means is attached to one of the gears of the speed reducer. When the gear to which the encoder is attached is different from the gear to which the operation member is directly fixed, when the rotation direction of the motor is reversed, the rotation amount of the gear to which the encoder is fixed and the gear to which the operation member is fixed are set. The amount of rotation has an error attributed to gear backlash when reversing the motor rotation direction. As described above, when the drive position, which is the output of the position detection means, is compared with the position of the displaced portion of the electronic circuit element, the drive position includes an error due to gear backlash, an error due to mesh play, and the like. I have. Therefore, the drive position and the displacement part are
They do not always correspond one-to-one. The gap between the drive position from the position detection means and the position of the displaced portion of the electronic circuit element is caused by play of the engagement between the electronic circuit element and the operation member, and the back of the combination part of the plurality of gears in the drive means. An error including a shift due to a rush occurs. These shifts occur when the operation member that has been driven in the one movement direction is reversed in the displacement direction and is displaced in the other movement direction. Also,
When the operating member that has been displaced in the other direction of movement reverses the direction of displacement and is displaced in one direction of movement, the amount of displacement is the same as when the direction of displacement is reversed from one direction of movement to the other direction of movement, and the direction of displacement. Is reversed. The position of the electronic circuit element is adjusted based on the driving position output from the position detecting means. Therefore, it is necessary to adjust in consideration of an error between the position of the displaced portion of the electronic circuit element and the driving position of the position detecting means. After the operation member is displaced in the one movement direction for level measurement, when the displacement direction is reversed from the end position of the level measurement and displaced in the other movement direction, the position of the displacement portion of the electronic circuit element and the drive position are changed. In the meantime, an error occurs because the direction of displacement of the operation member is reversed. Therefore, an error occurs between the position of the displacement portion corresponding to the drive position determined from the result of the level measurement and the position of the displacement portion actually displaced. It is difficult to measure this error in advance. In the adjusting device according to the present invention, when the operating member is moved in the one movement direction and the level is measured to determine the adjusting position, the electronic circuit element is moved from the position detecting means to a position beyond the position where the adjusting position is detected by an error. Return the position of the displacement part of. From this returned position, the operation member is again displaced in the one movement direction and moved to the adjustment position. The value of the error can be predicted, and the operating member is returned to a value equal to or greater than the predicted error value as described above. According to the present invention, in the adjustment device for an electronic device, the characteristics of the entire electronic device are adjusted by displacing the electronic circuit element by the displacement operation of the operation member and adjusting the electrical characteristics thereof. The control means of the adjusting device first measures the level of the electric signal by the level measuring means while driving the operation member in the predetermined one-way movement direction within the predetermined displacement range. The predetermined displacement range is a maximum level or a minimum level of the measured electric signal and includes a displacement position corresponding to a driving position at which the electronic circuit is to be adjusted. When the level measurement of the electric signal in the entire displacement range is completed, the control unit obtains the maximum level or the minimum level of the level of the measured electric signal based on the measurement result. The maximum level or the minimum level of these electric signals is a value close to the final drive position where the electronic circuit element should be adjusted. Next, the control means causes the drive means to drive the operation member in the other movement direction, which is opposite to the one movement direction during the scanning within the displacement range. At this time, the operation member is operated and driven to a position that exceeds the drive position corresponding to the obtained maximum level or minimum level by at least an error of the drive position. Next, the control means causes the level measurement means to measure the level of the electric signal while driving the operation member toward the one movement direction by the drive means. Either when the level of the measured electric signal satisfies a predetermined condition, or when the position of the operation member driven to be displaced reaches a drive position corresponding to the maximum level or the minimum level of the obtained electric signal level When one of the states is reached, the operation member is stopped at that position, and the adjustment ends. As described above, in the adjusting device of the present invention, after once measuring the level of the electric signal in the entire range of the displacement range, the drive position to finally adjust the electronic circuit element is estimated from the level measurement result. Thereafter, the operation member is returned to a position beyond the reference position. The final drive position of the electronic circuit element is determined by measuring the level of the electric signal again. Thus, for example, even when the reproducibility of the electric signal is low, the position of the electronic circuit element can be reliably determined and moved. In addition, by measuring the level of the electric signal in the entire range of the initial displacement, it is possible to determine the final guideline of the position of the electronic circuit element. The position of the element can be determined. Thereby, the adjustment time can be shortened.

According to the present invention, when the level of the electric signal is measured again, the control means sets the electric signal to be measured before the output of the position detecting means reaches the driving position corresponding to the maximum level or the minimum level. If the level of is a value below the minimum level of the level or a value above the maximum level,
The displacement of the operation member is stopped using the position at which the value is measured as the final drive position. For example, when the noise is superimposed on the output from the electronic circuit element or the output from the electronic circuit including the electronic circuit element, and the accurate maximum level or minimum level of the level of the electric signal is determined at the time of the first level measurement operation. May not be possible. At this time, the movement of the position of the electronic circuit element is stopped based on the detection of a value equal to or lower than the measured minimum level of the electric signal or a value equal to or higher than the maximum level of the electric signal. This ensures that during the first operation, even if noise does not accurately measure the maximum or minimum level,
The position of the electronic circuit element can be determined according to the maximum level or the minimum level.

According to the invention, when the electric signal level is measured again, the control means sets the difference between the latest measurement result of the electric signal level and the past measurement result to a positive value. The displacement operation of the operation member is stopped when the operation member changes from the negative value to the negative value or when the negative value changes to the positive value. That is, the level of the electric signal to be measured is set on one axis, and the drive position at which the level is measured is set on the other axis. When the slope of the curve shown is reversed, a predetermined condition is satisfied. Thus, when the level measurement is performed again, the operation member is stopped at a position immediately after the level of the electric signal reaches the maximum level or the minimum level. At this time, the drive position at which the level of the electric signal is measured is determined by the difference between the level of the electric signal measured at the time of the latest measurement and the level of the electric signal measured at the time of the next measurement. The level is set to be smaller than the allowable error range. That is, the amount of displacement in one measurement of the operating member is set to a magnitude such that the level change of the electric signal does not exceed the allowable error due to the displacement. In this way, the level of the electric signal is measured while displacing the operation member little by little, the slope of a curve indicating the change is calculated, and the final position is determined from the change in the slope. Thus, the position of the electronic circuit element can be set to a position very close to the position where the level of the electric signal output from the electronic circuit element or the electronic circuit including the electronic circuit element becomes the maximum level or the minimum level. Further, the maximum level or the minimum level can be surely grasped.

According to the present invention, there is provided an adjusting device for an electronic device including (a) an electronic circuit element capable of adjusting an electric characteristic by a displacement operation of an operation member, and (b) an electric signal from the electronic circuit element, or Level measuring means for measuring the level of an electric signal output from an electronic circuit including an electronic circuit element; and (c) engaging with an operating member to determine a predetermined one-movement direction and the other in a direction opposite to the one-movement direction. A drive means for displacing and driving the operation member in the moving direction; (d) a position detection means provided in association with the drive means for detecting a drive position corresponding to the displacement position of the operation member; and (e) a level measurement means. Control means responsive to the output from the position detection means, the change being a maximum level or a minimum level of the electric signal to be measured and corresponding to the adjustment level of the electronic circuit element to be adjusted. Within the predetermined displacement range of the operation member including the position, the operation member is driven to be displaced in the one movement direction by the drive means, and the level of the electric signal detected by the level measurement means and the drive detected by the position detection means Stored in the memory in correspondence with the position, based on the driving position corresponding to the maximum level or the minimum level of the electric signal stored in the memory, determine the adjustment position to be adjusted of the operation member, in the other movement direction, The position exceeding the driving position corresponding to the maximum level or the minimum level of the electric signal by a value equal to or more than the error along the one movement direction between the driving position detected by the position detecting means and the displacement position of the operation member is represented. The operating member is returned until the output of the position detecting means is obtained. The level at which the level of the electric signal detected by the level measuring means is greater than the maximum level or less than the minimum level, and the latest measurement of the level of the electrical signal The position where the difference between the result and the past measurement result of the level of the electric signal has changed from a positive value to a negative value or from a negative value to a positive value, or the output of the position detecting means is the adjustment position. And a control unit for driving the operation member to be displaced in the one direction by the driving unit until one of the states is reached. According to the present invention,
An adjustment device for an electronic device adjusts the overall characteristics of the electronic device by adjusting the electrical characteristics of the electronic device by a displacement operation of an operation member with respect to the electronic circuit element. The control means first measures the level of the electric signal while driving the operation member in the predetermined moving direction within the predetermined displacement range. From the level measurement results in the entire displacement range, a maximum level or a minimum level of the electric signal level in the entire displacement range is obtained. Further, an adjustment position of the operation member is obtained based on the maximum level or the minimum level. Next, the control means drives the operation member backward in the other movement direction opposite to the one movement direction to a position beyond the adjustment position by at least an error of the drive position, and causes the operation member to return. Then, the control means, from the reversed position,
The level of the electric signal is measured again while the operating member is displaced and driven in the predetermined one movement direction, and when the level of the measured electric signal satisfies a predetermined condition, or the operating member is moved to the adjustment position. When one of the earlier states is reached, the operation member is stopped at that position. The predetermined conditions are the position where the level of the electric signal detected by the level measuring means is equal to or higher than the maximum level or equal to or lower than the minimum level, the latest measurement result of the electric signal level and the electric signal level. Drive where the value of the difference between the level and the past measurement result changes from a positive value to a negative value or from a negative value to a positive value, or the output of the position detecting means corresponds to the maximum level or the minimum level Position is to reach either state. In this way, by finally determining the position where the electronic circuit element is to be moved, and while confirming whether or not a predetermined condition is satisfied before reaching the position, the operating member is moved more reliably by moving the operation member. The position of the electronic circuit element can be determined.

According to the present invention, there is provided an adjusting device for an electronic device including (a) an electronic circuit element capable of adjusting an electric characteristic by a displacement operation of an operation member, and (b) an electric signal from the electronic circuit element, or Level measuring means for measuring the level of an electric signal output from an electronic circuit including an electronic circuit element; and (c) operating in a predetermined one-movement direction and in a direction opposite to the one-movement direction by engaging with an operation member. (D) position detecting means provided in connection with the driving means and detecting a driving position corresponding to the displacement position of the operating member; (e) an adjustment start level of an electric signal; A condition memory for storing an optimum level of the signal and a coarse adjustment range including the optimum level; and (f) control means responsive to outputs of the level measurement means and the position detection means, The operation member is displaced in a predetermined moving direction from the drive position corresponding to the adjustment start level stored in the condition memory to the coarse adjustment range stored in the condition memory, when the level of the electric signal measured by the measuring means is reached. Drive, from the drive position corresponding to the level of the electric signal within the coarse adjustment range, and the optimal level of the electric signal,
Find a fine adjustment range that includes the drive position of the operating member corresponding to the optimal level of the electric signal stored in the condition memory,
From the driving position corresponding to the level of the electric signal within the coarse adjustment range, until the level of the electric signal measured by the level measuring unit reaches the fine adjustment range, the operating member is driven to be displaced in the moving direction by the driving unit. It is an adjustment device for an electronic device. According to the present invention, the adjustment device of the electronic device adjusts the characteristics of the entire electronic device by adjusting the electric characteristics of the electronic circuit element by the displacement operation of the operation member. In this electronic device, the characteristics of the entire electronic device are adjusted by adjusting the level of the electric signal output from the electronic circuit element or the electric signal output from the electronic circuit including the electronic circuit element to a predetermined level. adjust. The control means moves the position of the electronic circuit element by displacing the operation member while measuring the level of the electric signal output from the electronic circuit element or the electronic circuit including the electronic circuit element by the level measuring means. When the level of the measured electric signal reaches a predetermined adjustment start level, the level of the electric signal is measured while the operation member is displaced and driven in the predetermined movement direction from the drive position corresponding to the adjustment start level. When the level of the measured electric signal reaches a predetermined coarse adjustment range, the displacement driving of the operation member is stopped. The coarse adjustment range is a range including, for example, a predetermined optimum level of the electric signal. Next, the control unit performs an operation corresponding to the optimal level of the electric signal based on the driving position when the level of the electric signal is within the coarse adjustment range and the driving of the operation member is stopped, and the optimal level of the electric signal. A fine adjustment range including the driving position of the member is obtained. The fine adjustment range has, for example, data relating to the relationship between the end position in the characteristics and coarse adjustment of the electronic circuit element and the drive position corresponding to the optimum level of the electric signal, for example, empirically by the control means itself, This data is determined together with information on the stop position in the current coarse adjustment range. Lastly, the operation member is displaced and driven in the moving direction toward the fine adjustment range obtained from the stop position in the coarse adjustment range, and the level of the electric signal is measured while being displaced,
Stop when the level of the measured electric signal reaches the fine adjustment range. As a result, it is possible to stop the electronic circuit element at a position indicating the optimal level of the electric signal which determines the electric characteristic of the electronic circuit element in advance.

Also, in the present invention, the control means determines the moving direction in advance from the driving position corresponding to the adjustment start level until the level of the electric signal measured by the level measuring means reaches the coarse adjustment range. The operation member is driven to be displaced at a steady speed. According to the invention, when the operation member is displaced and driven to a position where the level of the electric signal reaches the adjustment start level, the control means corresponds to the optimal level of the level of the electric signal from the drive position where the displacement is driven. Estimate the driving position. Next, when the operation member is displaced from the drive position corresponding to the adjustment start level to the point where the level of the electric signal reaches the coarse adjustment range,
The operation member is moved in the moving direction. At this time, the moving speed is always kept constant.

[0034]

Further, according to the present invention, the control means may further comprise: the driving means, wherein the level of the electric signal measured by the level measuring means reaches a fine adjusting range from a driving position corresponding to the electric signal level within the coarse adjusting range. When the operating member is displaced and driven in the moving direction by the driving means, and the level of the electric signal detected by the level measuring means is a value outside the fine adjustment range, the driving position corresponding to the level of the electric signal in the coarse adjustment range. Up to this point, the operating member is driven to be displaced by a driving means in a moving direction opposite to the moving direction. According to the present invention, when determining the fine adjustment range, the control means drives the operating member in the moving direction from the drive position stopped at the position where the level of the electric signal is included in the coarse adjustment range. At this time, when the level of the electric signal once enters the fine adjustment range and then changes beyond the fine adjustment range, that is, when the drive position of the operating member moves beyond the fine adjustment range Then, the operating member is once returned to the stop position within the coarse adjustment range. Thus, when the adjusting member is displaced in one direction again, the moving direction is reversed. Therefore, when the drive position of the operation member is displaced from the actual displacement position of the operation member due to the backlash or the like, an error due to the displacement can be canceled.

[0036]

FIG. 1 is a block diagram showing an electrical configuration of an electronic apparatus adjusting apparatus 11 according to a first embodiment of the present invention. The adjusting device 11 adjusts the adjusting elements 13 and 14 of the electronic device 12 to be adjusted, such as a mini-disc reproducing device, to adjust the characteristics of the electronic device 12.

For example, when the electronic apparatus 12 is a mini-disc reproducing apparatus, the adjusting element 13 is provided for adjusting the focus of the pickup of the reproducing apparatus. Focus is the positional relationship between the focal point of laser light emitted from the pickup toward the recording surface of the disk and the disk recording surface, and the position of the pickup lens is adjusted so that the focal point matches the disk recording surface. I do.

The adjusting element 14 is provided for adjusting the tracking of the pickup. Tracking is an operation in which the focal position of the laser beam emitted from the pickup moves along the recording surface of the rotating disk, and the pickup moves so that the focal position tracks the center of the track set on the recording surface of the disk. Is controlled in the disk radial direction.

The electronic equipment 12 is driven by supplying drive power from a drive circuit 15. When the electronic device 12 is, for example, a mini-disc reproducing device, the electronic device 12
The inspection disk 16 is placed on the, and adjustment is performed while performing a reading operation of reading data recorded on the disk 16.

The electronic device 12 to be adjusted is, for example, a mini-disc reproducing device. In a mini-disc reproducing apparatus, a mini-disc disc is mounted on a substrate member including a configuration for rotating the mini-disc and an electric circuit for processing a signal read from the mini-disc so as to cover the substrate member. Often placed. In such a mini-disc reproducing apparatus, the lens in the pickup makes the focal point of the laser beam coincide with the recording surface of the disc while approaching the disc from the reference position which is the farthest position from the disc.

At this time, when the disk is irradiated with the laser beam from above in the vertical direction, the operation of approaching the disk becomes an operation of moving the lens downward in the vertical direction, and the lens moves more than a desired amount of movement due to its own weight. Sometimes. In order to reduce the influence of such gravity, a mini-disc reproducing apparatus generally has a structure in which a laser beam is irradiated from below the disc in a vertical direction.

At this time, the size of the substrate member of the electronic device 12 is substantially equal to the area of the disk placed thereon. Therefore, it is difficult to touch each part of the substrate member from above in the vertical direction with the disc mounted. Therefore, the adjusting elements 13 and 14 are provided on the surface of the substrate member of the electronic device opposite to the surface on which the disk is mounted, that is, the surface 12a on the vertically lower side of the mini disk reproducing device.

The adjusting device 11 includes a first adjusting mechanism 18 for adjusting the adjusting element 13 and a second adjusting mechanism 19 for adjusting the adjusting element 14. The first and second adjusting mechanisms 18 and 19 are provided with drivers 21 and 22 as operating members for adjusting the adjusting elements 13 and 14, respectively. The drivers 21 and 22 are pressed against the adjustment elements 13 and 14 provided on the lower surface 12 a of the electronic device 12 from below the installation position of the electronic device 12 by the moving devices 24 and 25, and the elements 13 and 14 are pressed. And rotated by the rotation driving devices 27 and 28, respectively. As will be described later, the adjusting elements 13 and 14
By rotating the adjusting knob of the adjusting element 13 to change the position of the adjusting element in the adjusting elements 13 and 14, the adjusting element 1
3, 14 change the electrical characteristics.

The first and second adjusting mechanisms 18 and 19 include:
Processing circuits 31 and 32 are provided, respectively. Processing circuit 3
1 and 32 control the amount of rotation of the drivers 21 and 22 as described later, determine the electrical characteristics of the adjusting elements 13 and 14, and adjust the characteristics of the electronic device 12. Processing circuits 31, 3
2 is a rotation driving device 2 via rotation control circuits 34 and 35
7 and 28 are controlled to determine the amount of rotation of the drivers 21 and 22.

The rotation driving devices 27 and 28 transmit the rotation from the motor to the drivers 21 and 22 via a speed reducer composed of a combination of a plurality of gears. In addition, the rotation driving devices 27 and 28 include rotation amount detection devices 37 and 38 called rotary encoders and the like for detecting the rotation amounts of the drivers 21 and 22. Rotation amount detection device 3
Reference numerals 7 and 38 denote one of a plurality of gears for transmitting the rotation of the motor between the motors in the rotary driving devices 27 and 28 and the drivers 21 and 22, for example.
The gears 1 and 22 are fixed to gears other than the fixed gear, and their rotation angles are detected. Rotation amount detector 37, 3
The output of 8 is supplied to processing circuits 31 and 32 via rotation control circuits 34 and 35, respectively.

The adjusting elements 13 and 14 of the electronic device 12
The inspection output output from each electronic circuit including
The level is detected by the level detectors 41 and 42.
The level detectors 41 and 42 include, for example, a voltmeter that measures the signal level of the test output, and a digital / analog conversion circuit that converts an analog output from the voltmeter into a digital signal. The detection result of the signal level of the inspection output is given to the processing circuits 31 and 32, respectively.

The first and second adjusting mechanisms 18 and 19 have memories 44 and 45 for storing outputs from the processing circuits 31 and 32, respectively. The memories 44 and 45 include level detectors 41 and 42 and rotation amount detectors 37 and 3.
8 are stored. Also, the second adjustment mechanism 19
In the memory 45, setting conditions of the adjusting element 14 described later are stored.

The adjusting device 11 has a display device 47 for displaying the result of the adjusting operation using the first and second adjusting mechanisms 18 and 19. This display device is realized by, for example, a cathode ray tube.

FIG. 2A shows the adjustment element 1 of the electronic device 12.
3 is a plan view showing a specific configuration of FIG. Adjusting element 13
Is configured to include an adjustment knob 51, an adjuster 52, and a resistor 53. When the adjustment element 13 rotates the adjustment knob 51, the adjuster 52 connected to the adjustment knob 51 rotates. The adjuster 52 makes point contact with the linear or band-shaped resistor 53 and moves along the longitudinal direction of the resistor 53 as the adjustment knob 51 is rotated. As the contact position of the resistor 53 with the adjuster 52 in the longitudinal direction changes, the resistance value of the adjustment element 13 changes.

As described above, the adjusting element 13 is, for example, a variable resistor. FIG. 2B shows an equivalent circuit of an electric circuit including the adjustment element. The input signal input to the electric circuit is output after its voltage level is converted by the adjusting element 13 and the resistor R1 having a fixed resistance value. The voltage at the point where the resistor 53 and the adjuster 52 are in contact with each other is supplied to the level detection device 41 as an inspection voltage.

A groove 54 for fitting the driver 21 is provided on the surface of the adjustment knob 51 opposite to the surface on which the adjuster 52 is fixed. In the first adjusting mechanism 18, the tip of the driver 21 is fitted into the groove 54, and the driver 2
1 is transmitted to the adjustment knob 51.

Although the adjuster 52 can be rotated by 360 °, depending on the arrangement of the resistor 53, the adjuster 5 can be rotated.
There is a portion where 2 does not contact the resistor 53. For example, when the adjustment knob 51 rotates in the direction of the arrow 55, the adjuster 52 moves while being in contact with the resistor 53 while the adjuster 52 moves from the point A to the point B. During the period from the point B to the point A, the resistor 53 does not exist where the adjuster 52 moves.

At this time, from the point A indicated by the two-dot chain line 56 to the point B
The time when the adjuster 52 is positioned before the point
When the adjuster is located between the point B and the point A indicated by the two-dot chain line 57, the adjustment element 13 is not used. The adjusting element 13 includes a two-dot chain line 56
The electric characteristics of the adjuster 52 change only when the adjuster 52 is in the use range indicated by. The adjusting element 13 is used only when the adjuster is in this use range.

FIG. 3 is a flowchart for explaining the minimum point adjusting operation for adjusting the adjusting element 13 of the electronic device 12 using the first adjusting mechanism 18 of the adjusting device 11 of FIG. The adjustment element 13 is an adjustment element for adjusting the focus of the pickup of the mini-disc when the electronic apparatus 12 is a mini-disc reproducing apparatus, for example. First
In the adjustment operation, the inspection output from the adjustment element 13 is detected, and the adjustment is performed by fixing the adjuster 52 of the adjustment element 13 at a position where the inspection level indicates the minimum level.

When the adjustment is started, the process proceeds from step a1 to step a2. In step a2, 0 is substituted into a counter N for counting the number of adjustments, and the counter is reset. As will be described later, the counter N counts the number of times of re-adjustment when there is an adjustment error.

When the reset of the counter is completed, the process proceeds from step a2 to step a3. In step a3, the electronic device 12 is driven to make the electronic device 12 perform a disk read operation. At the same time, the processing circuit 31 changes the position where the adjuster 52 and the resistor 53 come into contact with each other by rotating the driver to the rotation driving device 27 via the rotation control circuit 34 at a predetermined resolution, for example, 0.48 degrees. I do. The resolution is the minimum angle that can be measured by the rotation amount detection device 37. This angle can be preset by the user.

When the adjusting element 13 is rotated by a predetermined resolution, the level detecting device 41 is used to rotate the adjusting element 13.
Measure the signal level of the test output output from. The measured signal level and the detected position, which is the encoder output output from the rotation amount detection device 37 when the signal level is measured, are stored in the memory 44 so as to correspond to each other. That is, a detection position corresponding to the position of the adjuster 52 on the resistor 53 in the adjustment element 13 and a signal of an inspection output indicating characteristics of an electric circuit including the adjustment element 13 when the adjuster 52 is at the detection position. The level is stored correspondingly.

When the signal level of the inspection output when the adjustment element 52 is at a certain detection position is measured, the process proceeds to step a4. In step a4, the measurement result of the signal level output from the level detection device 41 is smoothed. For example, the processing circuit 31 controls the adjustment element 13 by the rotation control circuit 34.
Is rotated in a predetermined one direction by a predetermined resolution, and the level of the inspection output at that time is measured. This rotation in one predetermined direction is hereinafter referred to as “forward rotation”. When this level measurement operation is repeated a plurality of times, the measurement results of the plurality of times are smoothed, and the smoothed result is read from the first detection position of the element 13 in the plurality of measurements.
Is the detection result corresponding to the middle point between the last detection positions.

At each detection position where the adjusting element 52 is rotated forward by a predetermined resolution, the measurement results of the signal levels before and after the detection position are obtained. Smoothing.
The predetermined number is, for example, each measurement result of the signal level corresponding to five detection positions. For example, if the fifth measurement operation is performed after starting the level measurement operation for measuring the signal level of the inspection output at each detection position of the adjustment element 13, the first to fifth measurement results are smoothed, and the smoothed result is obtained. Is the signal level of the inspection output measured at the detection position in the third measurement operation.

The detected position detected in each detection operation and the signal level as a smoothed result of the measurement result of the smoothed test output are stored in the memory 44 in correspondence with each other. As described above, by smoothing the level measurement result of the test output, it is possible to remove the influence of noise or the like superimposed on the test output.

When the signal level of the test output is smoothed and stored in the memory, the process proceeds from step a4 to step a5. In step a5, it is determined whether the adjustment element 13 has been rotated once. That is, it is determined whether or not the adjuster 52 has rotated 360 ° in the adjustment element 13. If it has not been rotated by 360 °, the process returns from step a5 to step a3, and the level measurement operation at the next detection position is performed. When the adjustment element 13 makes one rotation, it is determined that the measurement of the change in the signal level of the inspection output corresponding to each detection position of the adjustment element 13 has been completed, and the process proceeds from step a5 to step a6. That is, the level measurement operation is performed in the entire rotatable range of the adjustment element 13.

As described above, steps a3 to a5
By repeating the operation of measuring the level of the inspection output in a plurality of times, a change in the electrical characteristics of the adjustment element 13 corresponding to the position of the adjuster 52 of the adjustment element 13 can be obtained.

FIG. 4 is a graph showing the relationship between the detection position of the adjusting element 13 and the signal level of the inspection output at each detection position. The electrical characteristics shown by the solid line 61 are obtained by the level measurement operation in steps a3 to a5. This signal level is a value smoothed in step a4 of the above-described flowchart. The detection position is
This is an output from the rotation amount detection device 37.

The electric circuit including the adjusting element 13 outputs a test output having a maximum signal level when the current position of the detecting position of the adjusting element 13 is the position xp1, xp2. Between the position x0 and the position xp1 when the adjustment element 13 is not rotated, as the detection position moves, the signal level of the inspection output takes the maximum signal level while taking the maximum level or the minimum level. Level Lp
To increase. When the detection position moves from the position xp1 to the position xd, the signal level of the inspection output gradually decreases. At this time, the degree of decrease in the signal level, that is, the slope of the solid line 61 may fluctuate.

The current position of the detected position is from position xd to position x.
After moving to p2, the signal level of the inspection output gradually increases from the minimum level Ld to the maximum level Lp. When the current position of the detection position is moved from the position xp2 to the final position xmax, which is the position where the adjustment element 13 is rotated once, the signal level of the inspection output decreases while taking the maximum level and the minimum level.

The adjuster 52 of the adjustment element 13 moves in a circle around the center of rotation of the adjustment knob 51. Therefore, the position xmax and the position x0 are adjacent.
The adjusting knob 51 is provided with a pawl to prevent the adjusting element 52 of the adjusting element 13 from rotating, for example, 360 degrees or more.

FIG. 3 is referred to again. When the measurement of the change in the signal level of the inspection output in steps a3 to a5 is completed, the process proceeds from step a5 to step a6. In step a6, the range of the detection position corresponding to the use range of the adjustment element 13 and the range of the detection position corresponding to the non-use position are determined. As shown in FIG.
3 has a use range where the adjuster 52 contacts the resistor 53 and a non-use range where the adjuster 52 does not contact.

The test output supplied to the level detecting device 41 is the adjustment element 1 defined by the output level of the input signal and the contact position between the adjuster 52 and the resistor 53.
3 is specified by the resistance value. In the non-use range of the adjusting element 13, the adjusting element 52 and the resistor 53 do not come into contact with each other. At this time, for example, noise from the external space or the like is superimposed on the adjuster 52, and the output fluctuates due to the influence of the noise or the like. Therefore, the adjustment element 13 is used only for the use range.

As described above, the adjuster 52 and the resistor 53
The range in which the actuator 52 moves while contacting is wider than the non-use range in which the adjuster 52 and the resistor 53 do not contact. Therefore, from the measurement result of the signal level, the processing circuit 31 determines the position xp at which the signal level of the inspection output becomes the maximum level Lp.
The range between 1, xp2 and the larger size is determined as the use range. Position xp1, xp2
And a range smaller than the range determined as the use range is regarded as a non-use range.

In FIG. 4, a range W1 between the positions xp1 and xp2 and including the position xd is determined as the use range. The ranges W2 and W3 other than the use range are determined as the non-use range. The processing circuit 31 adjusts the adjustment element 13 within the range of use to adjust the output characteristics of the electric circuit including the adjustment element 13.

When the use range and the non-use range of the element 13 are determined, the process proceeds from step a6 to step a7. In step a7, a detection position where the measured signal level becomes the minimum level Ld is extracted within the use range determined in step a6. That is, the minimum detection position xd is extracted. When the minimum detection position xd is extracted, step a
The process proceeds from Step 7 to Step a8.

In step a8, the adjusting element 13 is adjusted to obtain desired characteristics of the electronic circuit including the adjusting element 13.
The target position which is the detection position corresponding to the position where the adjuster 52 is finally adjusted is determined. FIG. 5 is a partially enlarged view of the vicinity of the detection position xd in the graph of FIG. In the electronic circuit including the adjustment element 13, the adjustment is performed so that the signal level of the inspection output becomes the minimum level. Therefore, the target position is, for example, a detection position indicating the minimum level within the use range among the level measurement results obtained in the first level measurement. That is, the minimum level Ld
Xd.

The target position is a position where a signal level larger than the minimum level Ld of the signal level of the inspection output by the error allowable range D is detected, and is a position smaller or larger than the minimum position xd. Position xe1, xe
The position xe may be the midpoint between the two. Position xe1
Is referred to as a dip area W5. At the position included in the dip area W5, the signal level of the inspection output detected at each detection position is equal to or more than the minimum signal level Ld and the signal level (Ld + D).
Within. That is, in the dip region W5, the measured signal level of the inspection output is always included in the error tolerance of the minimum level of the signal level to be adjusted.

Furthermore, the target position may be a position corresponding to the centroid of the region 64 between the virtual line 63 connecting the positions xe1 and xe2 and the solid line 61 indicating the detected signal level change. Good. That is, the target position is the area 64
May be one coordinate value of the centroid G. In FIG. 5, the region 64 is shown by hatching.

The position xg of the centroid G is obtained by the following equation.

[0076]

(Equation 1)

X is the distance between each detection position and the reference position x0. L (x) is the level of the electric signal corresponding to each detection position x.

For example, when the adjustment is completed and the driver 21 is removed from the groove 54 of the adjustment knob 51 of the adjustment element 13, the adjustment element 13 may be rotated by mistake. At this time, as shown in FIG.
If the degree of signal level change before and after d differs, the degree of signal level shift may differ depending on the direction in which the adjuster 52 of the adjustment element 13 shifts. For example, when the adjustment element 13 has a characteristic as shown in FIG. 5, when the adjustment element 13 shifts in the direction in which the detection position increases, the signal level of the inspection output becomes higher than when the adjustment element 13 shifts in the direction in which the detection position decreases.

At this time, the adjustment target of the adjustment element 13 is set to a position corresponding to the center of the permissible error range of the signal level or the centroid. 13, it is possible to prevent the detection position after adjustment from deviating beyond the allowable error range due to a large change in the characteristic of No. 13. In particular, assuming that a position corresponding to the centroid of the region 64 is a target position, the target position is compared with when the middle point of the dip region W5 is selected as the target position, and the target position is set to a position corresponding to the minimum signal level. You can get closer.

When the target position is determined in step a8, the flow advances to step a9 to determine the adjustment start position. As described above, in the speed reducer in the rotation drive device 27, the gear on which the rotation amount detection device 37 is mounted and the driver 21
May be a different gear from the gear to which is fixed. At this time, the detection position output from the rotation amount detection device 37 is a measurement of the movement of a gear different from the gear directly fixed to the driver 21. At this time, when the rotation direction of the motor of the rotation drive device 27 is reversed, only the gear to which the rotation amount detection device 37 is attached is reduced by the play called backlash generated at the meshing portion of the gear teeth. A state in which the gear to which the driver 21 is mounted does not rotate beforehand rotates. Therefore, the driver 21
A displacement occurs due to backlash between the displacement position and the detection position detected by the rotation amount detection device.

The engagement between the driver 21 and the groove 54 of the adjusting knob 51 of the adjusting element 13 has a slight play. When the rotation direction of the driver 21 is reversed, the adjustment knob 51 starts rotating with a delay of the engagement play. That is, when the rotation direction is reversed, there is a shift between the amount of rotation of the driver 21 and the amount of rotation of the adjustment knob 51 by an amount of play for engagement.

That is, after the rotation element 13 is rotated forward so that the signal level shown in the direction of the arrow 68 is measured from the detection position x0, after reaching the detection position xmax, the rotation direction is reversed, and The adjustment element 13 is rotated in the 69 direction. Hereinafter, the rotation in the direction opposite to the one direction which is the rotation direction at the time of the first level measurement is referred to as “reverse rotation”. At this time, during the shift W7, the adjustment knob 51 does not rotate even if the gear on which the rotation amount detection device 37 is mounted is rotating.

The two-dot chain line 66 in FIG. 4 shows the relationship between the signal level of the inspection output and the detection position when the adjustment element 13 is rotated in the reverse direction. If the adjustment element 13 is reversely rotated from the detection position xmax to the detection position x0, the change in the signal level when the signal level is measured in the direction of the arrow 68 shifts in the direction in which the detection position decreases by the shift W7. The signal level changes are equivalent.

Therefore, after the adjustment element 13 is rotated forward from the detection position x0 to the detection position xmax for the first level detection, the adjustment element 13 is rotated reversely from the detection position xmax to the target position to obtain the current position of the detection position. Is moved, the actual position of the adjuster 52 of the adjusting element 13 corresponding to the current position of the detected position is changed by the range W7 of the displacement caused by the backlash or the like.
Is shifted from the position of the corresponding adjuster 52 when is rotated in the forward direction. Therefore, the signal level of the inspection output from the electronic circuit at this time does not reach the minimum level.

In the adjusting device of this embodiment, the adjusting element 13
Is rotated in the reverse direction to return from the position xmax, which is the final position of the first level detection, to the start position beyond the target position. Thereafter, the adjusting element 13 is rotated again from the start position in the forward direction. The start position is a position where the detection position is reversed from the final position of the first level measurement beyond the target position and is closer to the position x0 which is the starting position of the first level detection than the target position. The position xp1, which is one end of the use range W1 of the element. The target position and the start position are separated by at least a shift range W7.

The start position may be a position Xθ returned by a predetermined return amount θ in a direction in which the detection position becomes smaller than the minimum detection position xd whose signal level in the use range W1 is the minimum level Ld. Good. Furthermore, the start position is a position where the detection position has returned in a direction in which the detection position is smaller than the minimum detection position xd, and the signal level is the minimum level Ld.
May be a position xe1 indicating a value (Ld + D) obtained by adding the error allowable range D to the error.

When the start position is determined in step a9,
Proceed to step a10. In step a10, the adjustment element 13 is rotated in the reverse direction to return the current position of the signal level detection position to a position where the output of the rotation amount detection device 37 matches the start position. That is, the position is returned until the detection position output from the rotation amount detection device 37 matches the start position. At this time, the processing circuit 31 returns the adjusting element 13 based only on the output of the rotation amount detecting device 37. When the current position of the detected position returns to the start position, steps a10 to a1 are executed.
Proceed to 1. In step a11, the adjustment element 13 is rotated forward to move the current position of the detection position from the start position. At this time, the processing circuit 31 also controls the rotation amount detecting device 37.
Make adjustments based only on the output of.

When the adjustment element 13 is rotated in the reverse direction, the position of the adjuster 52 of the adjustment element 13 corresponding to the detection position of the rotation amount detection device 37 is determined by the backlash of the gear of the reduction gear of the rotation drive device 27. The position is advanced from the position when the forward rotation is performed by an amount corresponding to the position shift W7. Furthermore, when the adjusting element 13 is reversely rotated and then rotated in the reverse direction to rotate forward, the position of the adjuster 52 of the adjusting element 13 is reversed when the adjustment element 13 is rotated in the reverse direction by an amount corresponding to the range W7 of the shift of the detection position. Late than position. Therefore, step a
The shift caused by rotating the adjustment element 13 in the reverse direction at 10 is canceled by the shift caused when the rotation direction is reversed and rotated forward in step a11. therefore,
If the level of the inspection output is temporarily detected in step all, the output changes along a solid line 61 in FIG.

When the detection position is moved by rotating the element 13 in the forward direction, the process proceeds from step a11 to step a12. In step a12, it is determined whether or not the current position of the detection position detected by the rotation amount detection device 37 has reached the target position. If not, the process returns to step a11 again, and continues to move the current position of the detected position. When the current position of the detected position has reached the target position, the process proceeds from step a12 to step a13.

At step a13, the level of the inspection output of the adjustment element 13 is detected at the adjustment completion position which is the final detection position of the adjustment element 13, that is, at the target position in this embodiment. When the level is detected, the process proceeds from step a13 to step a14. In step a14, it is determined whether or not the final detection position detected in step a13 falls within a predetermined range of the inspection output output from the electronic circuit including the adjustment element 13. If not included, the process proceeds from step a14 to step a15.

In step a15, it is determined whether or not the adjustment completion condition is satisfied in the adjustment process in steps a1 to a14. The adjustment completion condition is
For example, it is a condition for determining whether or not the use range and the non-use range of the adjustment element 13 have been determined in Step a6. When the use range and the non-use range cannot be determined, it is determined that the adjustment completion condition is not satisfied. Also,
The adjustment completion condition is a condition for determining whether a motor failure of the rotation drive device 27 that rotates the adjustment element 13 has been detected. When a motor failure is detected, it is determined that the adjustment completion condition has not been satisfied. Furthermore, the adjustment completion condition is a condition for determining whether or not an abnormality has occurred in the operation of the electronic device 12 to be adjusted. If an abnormality has occurred in the operation of the electronic device 12, it is determined that the adjustment completion condition has not been satisfied.

If the adjustment completion condition cannot be satisfied, the adjustment is terminated. When the adjustment completion condition is satisfied, it is determined that the detection value at the adjustment completion position is out of the specification because, for example, noise or the like is mixed in the detection of the detection value. At this time, step a1
The process proceeds from step 5 to step a16. At step a16, it is determined whether or not the value of the counter N is a predetermined Nmax. Nmax is the allowable number of times of redoing the adjustment. For example, the number of redoes of adjustment is set to two. When the value of the counter N counting the number of adjustments is less than the predetermined number of adjustments, the process proceeds from step a16 to step a17.

In step a17, it is determined whether or not the adjustment time after starting the adjustment in step a1 exceeds a predetermined time. For example, it is assumed that the adjustment is performed on one adjustment element, and when the adjustment is completed normally, the adjustment time required for the adjustment operation from step a1 to step 14 is about 40 seconds. In such a case, in step a17, when one minute or more has elapsed since the start of the adjustment in this flowchart, it is determined that the adjustment time has been exceeded and the adjustment is inferior. This adjustment time is defined as an adjustment time for adjusting all the adjustment elements when a plurality of adjustment elements are installed in the electronic device 12 to be adjusted.

If the adjustment time has not exceeded and it is possible to perform the adjustment again, the value of the counter N is incremented by 1 in step a18, and the process returns to step a3 to perform the adjustment again. At this time, the process may return from step a18 to step a8, and the adjustment may be performed again from the determination of the target position.

When the completion condition is not satisfied in step a15, when the number of re-adjustments exceeds a predetermined number Nmax in step a16, and when the adjustment time has exceeded, the steps a15 to a17 to step a19 are performed. Proceed to. In step a19, it is determined that the current adjustment operation on the adjustment element 13 has failed. At this time, the processing circuit 31 visually displays on the display device 47 that the adjustment has failed.

If the detected position is within the specified range in step a14, it is determined that the adjustment has been successful. At this time, the process proceeds from step a14 to step a20 to end the adjustment operation. When it is determined in step a19 that the current adjustment operation has failed, the failure of the adjustment operation is also visually displayed.
Proceeding to 20, the processing operation of the flowchart is ended.

Thus, even if the detected position outputted from the rotation amount detecting means 37 and the position of the adjuster 52 in the adjusting element 13 are shifted each time the rotation direction of the adjusting element 13 is reversed, the position is shifted. This offset can be offset. Therefore, the adjustment element can be surely adjusted.

FIG. 6 is a flowchart for explaining a level adjusting operation for adjusting the characteristics of an electronic circuit including the adjusting element 14 of the electronic device 12 using the second adjusting mechanism 19 of the adjusting device 11 of FIG. . The electronic circuit including the adjusting element 14 is a circuit for adjusting the tracking of the pickup of the mini-disc when the electronic device 12 is a mini-disc reproducing device, for example. The adjustment element 14 has the same configuration as the adjustment element 13 shown in FIG. This adjustment element 14
Is adjusted so that the signal level of the test output becomes a predetermined adjustment target level.

FIG. 7 is a graph showing a change in the signal level of the inspection output output from the electronic circuit including the adjustment element 14. For example, when the adjustment knob of the adjustment element 14 is rotated from a position y0, which is one end of the rotatable range, to a position ymax, which is the other end of the rotatable range, the signal level of the inspection output is as shown by a solid line 71. Changes to In the electronic circuit including the adjusting element 14, the signal level is the minimum level Q
The range from the position yd, which is d, to the position yp at which the maximum signal level Qp is detected, where the range is large, is defined as a use range. In FIG. 7, the range W11 is a use range. Therefore, a range W12 from the position y0 to the detection position yd and a range W13 from the detection position yp to the detection position ymax are non-use ranges. FIG.
FIG. 8 is a partially enlarged view of a vicinity of a predetermined adjustment target level Q in the graph of FIG. 7.

When the adjustment operation is started, the process proceeds from step b1 to step b2. In step b2, 0 is substituted into a counter N for counting the number of adjustments, and reset. When the reset of the counter ends, the process proceeds from step b2 to step b3.

In step b3, while the electronic device 12 is driven by the drive circuit 15 to perform a read operation of reading a signal from the disk 16, the adjustment knob of the adjustment element 14 is predetermined using the driver 22 in one direction, for example, The detection position output from the rotation amount detection device 38 is the position y
The adjustment element 14 is rotated in a direction from 0 to the position ymax via the position yd and the position yp. Rotating the adjustment element 14 in one predetermined direction is hereinafter referred to as “forward rotation”. At the same time as rotating the adjusting element 14, the adjusting element 14 is
The signal level of the test output from the electronic circuit including is detected.

When the signal level of the inspection output is detected, the process proceeds from step b3 to step b4. In step b4,
It is determined whether or not the signal level of the test output output from the level detection device 42 is a predetermined start level Q1. This start level Q1 is close to the minimum signal level Qd in the use range. For example, when the minimum signal level of the inspection output is 20 mV, the maximum signal level is 300 mV, and the adjustment target level is 88 mV, the start level Q1 is determined to be 30 mV or less. This start level Q1
Are predetermined and stored in the memory 45 from an adjustment record of an electronic device that has been adjusted in the past.

In step b4, for example, the measured signal level once becomes lower than the minimum level Qd, and when the measured signal level further reaches the start level Q1, the signal level reaches the start level. Judge that If the measured signal level has not yet reached the start level Q1, the process returns to step b3, and the adjustment element 14 is further rotated forward. When the measured signal level reaches the start level Q1, the process proceeds from step b4 to step b5.

In step b5, the electronic device 12 is driven by using the drive circuit 15, and the readout operation of the signal from the disk 16 is performed. The signal level of the inspection output of the electronic circuit in the above is detected using the level detection device 42. The measured signal level is stored in the memory 45 in correspondence with the detected position at that time.

When the signal level is detected, the process proceeds from step b5 to step b6, where it is determined whether or not the signal level of the inspection output output from the level detection device 42 has reached a predetermined coarse adjustment target range WD1. The coarse adjustment target range WD1 is, for example, a level that is smaller than a predetermined adjustment target level Q by a predetermined level difference ΔQ and ΔQ
Only the range up to a larger level, that is, (Q−Δ
Q) or more and (Q + ΔQ) or less. The predetermined level difference ΔQ is, for example, an allowable error range of the adjustment target level Q, and is about 8 mV. Therefore, the coarse adjustment target range is
It is 79 mV or more and 96 mV or less.

If the signal level is outside the coarse adjustment target range WD1, the process proceeds from step b6 to step b7, where it is determined whether the signal level determined in step b6 is equal to or lower than a predetermined specified level. . The predetermined designated level is, for example, the maximum level Qp of the use range W11.

That the signal level becomes equal to or higher than the specified level means that the position of the adjuster in the adjusting element 14 corresponding to the detection position of the rotation amount detecting device 38 is equal to the coarse adjustment target range WD.
This means that the position has exceeded the position range W14 corresponding to 1 and has reached the non-use range in which the adjuster 3 does not contact the resistor in the element 14. At this time, it is determined that the adjustment has failed. When the signal level is equal to or lower than the designated level, it is determined that the detection position where the determined signal level is detected has not reached the position range W14 corresponding to the rough adjustment target range WD1. At this time, the process returns from step b7 to step b5, and the adjusting element 14 is further rotated forward by the first resolution to obtain the signal level of the inspection output at the next detection position. If it is determined in step b6 that the detected position is within the coarse adjustment target range Wd, the process proceeds from step b6 to step b8.

In step b8, a fine adjustment position range W15 including a target detection position yQ at which the signal level of the inspection output from the electronic circuit reaches the adjustment target level Q is estimated from the coarse adjustment end position y2. The coarse adjustment end position y2 is a detection position where the signal level regarded as having reached the rough adjustment target range WD1 in step b6 is detected. The relationship between the coarse adjustment end position y2 and the target detection position yQ at which the adjustment target level Q is detected is empirically obtained in advance, and is stored as data in the memory 45, for example. The processing circuit 32 calculates the coarse adjustment end position y2 detected during the current adjustment based on the stored data and the coarse adjustment end position y2.
The fine adjustment position range W15 is estimated.

The fine adjustment position range W15 is, for example, the position y
The range is not less than (Q−Δd) and not more than y (Q + Δd). The position y (Q-Δd) is a detection position where a signal level (Q-Δd) whose level is smaller than the adjustment target level Q by Δd is to be detected. The position y (Q + Δd) is a detection position where a signal level (Q + Δd) whose signal level is larger than the adjustment target level Q by Δd is to be detected. When the fine adjustment position range W15 is estimated, the process proceeds from step b8 to step b9. In step b9, the electronic device 12 is driven by the drive circuit 15 to read the signal from the disk 16, and the adjustment element 14 is rotated forward by the second resolution. At the same time, the level detection device 42 detects the signal level of the inspection output for each detection position moved by the second resolution. When the signal level is detected, the process proceeds from step b9 to step b10.

In step b9, the adjusting element 14 is rotated forward by the second resolution while the electronic device 12 is driven by the drive circuit 15 to read the signal from the disk 16. At the same time, in the level detection device 42,
The signal level of the inspection output is detected for each detection position moved by the second resolution. When the signal level is detected, the process proceeds from step b9 to step b10.

The second resolution is a smaller amount than the first resolution. That is, in step b10, step b5
The fine adjustment for moving the detection position for detecting the signal level by a small amount is performed as compared with the coarse adjustment performed in the above. At this time, the detection position output from the level detection device 42 may be used as it is for the determination. Also, the level detection device 41
May be determined using a smoothed output that has been smoothed. As described above, by smoothing the signal level of the test output, it is possible to remove the influence of noise superimposed on the test output.

In step b10, it is determined whether or not the signal level of the inspection output measured in step b9 falls within a predetermined fine adjustment target range WD2. The fine adjustment target range WD2 is smaller than the adjustment target level Q of the signal level of the inspection output by a predetermined level difference Δd (Q−
Δd) or more and a value (Q + Δd) larger than the adjustment target level Q by a predetermined level difference Δd or less. The predetermined level difference Δd is smaller than the level difference ΔD in the rough adjustment target range, for example, 1 mV. When the signal level falls within this range, the adjusting element 14 at that time is used.
Of the adjustment element 1 corresponding to the detection position yQ
4 is determined to be very close to the position of the adjuster. When the signal level is out of the range of the fine adjustment target WD2, step b
The process proceeds from step 10 to step b11.

At step b11, it is determined whether or not the detection position at which the signal level determined at step b10 is detected exceeds the fine adjustment position range W15 estimated at step b8. When the current position of the detection position exceeds the fine adjustment position range W15, it is determined that the detection position yQ corresponding to the target adjustment level Q does not exist even if the adjustment element 14 is further rotated in the forward direction. At this time, proceeding to step b12, the adjustment element 14 is rotated in the reverse direction to return the current position of the detected position to the coarse adjustment end position y2.

Thus, steps b9 to b
The fine adjustment performed in step 12 will be repeated from the beginning. As described in the first adjusting operation, the rotation amount detection device 38 may be fixed to a gear different from the gear to which the driver 22 is fixed. At this time, when the driver 22 is rotated in the reverse direction, the actual amount of rotation of the driver, that is, the return amount of the adjuster in the adjustment element 14 and the detection position output from the rotation amount detection device 38 are shifted due to backlash of these gears. Occurs.

In the fine adjustment in the present flowchart, when the current position of the detected position exceeds the fine adjustment position range W15, the current position of the detected position is not detected by reversing from the exceeded position to detect the adjusted position. Returns the position to the first detection position. Thereby, step b12
By switching the rotation direction twice between the reverse rotation operation in the following and the forward rotation operation in the subsequent step b9,
Offset due to backlash is offset.

In step b11, when the current position of the detection position does not exceed the fine adjustment target range, it is determined that the current position of the detection position has not yet reached the detection position yQ corresponding to the adjustment target level Q. At this time, the process returns to step b9.

In step b10, when it is determined that the signal level is within the fine adjustment target range WD2, it is determined that the current position of the detection position is extremely close to the target detection position yQ. At this time, this position is set as the adjustment completion position, and the process proceeds from step b10 to step b13.

In step b13, the signal level of the inspection output in the state where the adjustment element 14 has reached the adjustment completion position is measured by the level detection device 42, and step b1 is performed.
Proceed to 4. In step b14, it is determined whether or not the signal level of the inspection output measured at the final adjustment completion position is equal to or lower than a predetermined specified level, for example, the maximum signal level Qp. If the signal level exceeds a predetermined level, Step b1 to Step b
It is determined that the adjustment made at 14 was unsuccessful.

At this time, the process proceeds from step b14 to step b15, in which it is determined whether or not the value of the counter N counting the number of times of adjustment is less than the maximum number of times Nmax. If so, step b1
The process proceeds from Step 5 to Step b16, and it is determined whether or not the adjustment time required for the adjustment operation started from Step b1 exceeds a predetermined adjustment time. If the adjustment time has not elapsed and the adjustment can still be performed, the process proceeds from step b16 to step b17. In step b7 described above, even when the signal level in the coarse adjustment exceeds a predetermined value, the process proceeds from step b7 to step b17. In step b17, 1 is added to the counter N for updating, and the process returns to step b3. by this,
The adjustment of the adjustment element 14 is performed again.

When the number of repetitions of the adjustment has exceeded the predetermined number in step b15, and when the adjustment time has exceeded in step b16,
Proceeding to step b18, the display device 47 visually displays that the adjustment by the electronic device 12 in the adjustment has failed. When the visual display ends, the process proceeds from step b18 to step b19, and the processing operation of the flowchart ends. Also, in step b14, when the signal level is equal to or less than the predetermined value,
The process advances from step 14 to step b19 to end the processing operation of the flowchart.

When performing the level adjustment for adjusting the characteristics of the electronic circuit including the adjustment element 14 so that the signal level of the inspection output reaches the predetermined level, the level adjustment from the predetermined start level to the predetermined coarse adjustment range is performed. The speed at which the adjustment element 14 is rotated is increased by increasing the resolution.
Further, after the signal level reaches within the rough adjustment target range, fine adjustment is performed by lowering the resolution and gently rotating the adjustment element 14 than when performing the coarse adjustment. As described above, by dividing the adjustment into the fine adjustment and the coarse adjustment, the operation speed of the level measurement in the coarse adjustment stage can be improved.

Further, when the fine adjustment is performed, if the position exceeds the fine adjustment position range W15 estimated in advance, the adjustment element 14 is reversely rotated to return the detection position to the start position of the fine adjustment once. Reverse the direction of rotation and resume fine adjustment. Thereby, even when the fine adjustment is repeatedly performed, the deviation between the rotation amount of the driver and the detection position output from the rotation amount detection device 38 can be offset.

When performing the coarse adjustment in step b5 of the flowchart of FIG. 6, the adjusting element is rotated by a predetermined first resolution. At this time, the driver 22 was constantly rotating at a predetermined speed. At this time, the rotation speed may be reduced as the current position of the detection position of the adjustment element 14 approaches the target detection position yQ corresponding to the adjustment target level Q. This rotation speed is
For example, it is controlled by controlling the drive voltage of a motor provided in the rotary drive device 28. For example, as shown by a solid line 81 in FIG. 9, this motor has a rotational speed of 0 from a drive voltage of 0 to a voltage of Vmin, and is proportional to an increase of the drive voltage when the drive voltage becomes Vmin or more. And the rotation speed also increases.

FIG. 10 shows the timing of switching the rotational speed of the adjustment element 14 in the coarse adjustment operation. FIG. 10 (1)
Rotates the adjustment element 14 and moves the level detection device 42
Shows a time change of the signal level of the inspection output detected by the above.
FIG. 10B shows a temporal change of the drive voltage applied to the motor of the rotary drive device 28. FIG. 10C shows a temporal change in the rotation speed of the motor in the rotation driving device 28.

When the adjusting element 14 is rotated in the forward direction, the signal level of the inspection output increases. At this time, the drive voltage applied to the motor is at a predetermined voltage level Vmax. At this time, the motor rotates at ωmax. When the signal level reaches a predetermined level Q2, the processing circuit 31
Reduces the drive voltage applied to the motor to V2. As a result, the rotation speed of the motor is reduced to the drive voltage V2.
To the rotation speed ω2 corresponding to Further, the signal level increases and the predetermined maximum level Qp of the signal level increases.
, The drive voltage is reduced to 0 after a predetermined waiting time. As a result, the rotation speed of the motor becomes 0, and the motor is stopped.

As described above, the predetermined adjustment target level Q
, The rotational speed of the adjusting element 14 becomes gentler,
The detection position of the adjustment element 14 is moved little by little. Thereby, it is possible to prevent the detection position of the adjustment element 14 from erroneously exceeding the coarse adjustment end position.

FIG. 11 shows that the adjustment device is adjusted by using the adjustment device according to the second embodiment of the present invention so that the signal level of the test output output from the electronic circuit including the adjustment device becomes the minimum level. It is a flowchart for demonstrating the minimum point adjustment operation | movement.

The adjusting device according to the present embodiment is similar to the first device shown in FIG.
It has the same configuration as the adjusting device 11 of the embodiment. Further, the adjustment element for performing the level adjustment is adjusted by using the same method as the flowchart shown in FIG. FIG. 11 of the present embodiment
Has a configuration similar to the flowchart of FIG. 3 of the first embodiment. Steps for performing the same operation are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, when the adjustment target position of the adjustment element is determined, and then the detection position of the adjustment element is moved to the target position, the inspection output at the current position is simultaneously performed while the detection position is moved. Is detected. When the measured signal level satisfies a predetermined condition, it is determined that the adjustment has been completed.

When the adjustment is started and the driver for rotating the adjustment element is fitted into the groove of the adjustment knob by the moving device, the process proceeds from step b1 to step a2. In step a2, a counter for counting the number of adjustments is reset, and the process proceeds to step a3. Step a3
In Step a5, the signal level of the inspection output at that time is detected while the adjustment element is rotated in the entire rotatable range, and the value of the signal level is stored after smoothing the value.

When the first level measurement is completed, a use range and a non-use range in the rotatable range of the adjusting element are determined in step a6. After the use range is determined, the minimum detection position where the signal level becomes the minimum signal level within the use range is extracted in step a7. In step a8, a target position for adjusting the adjusting element is determined based on the extracted minimum detected position, and the process proceeds to step a9. Step a
In step 9, based on the extracted minimum detection position, the start position of the movement operation for moving the adjustment element to the target position is determined, and the process proceeds to step a10.

In step a10, the adjustment element is rotated in the reverse direction to return the current position of the signal level detection position to the start position. When the current position of the detected position is returned to the start position, the process proceeds from step a10 to step b11, and the adjustment element is rotated forward while driving the electronic device. At this time, at each detection position that is simultaneously moved by a predetermined resolution,
The signal level of the test output of the adjustment element is detected.

When the signal level is detected, step b1
From 1 the process proceeds to step b12, where it is determined whether the signal level satisfies a predetermined condition. The predetermined condition is, for example, whether or not the measured signal level is equal to or lower than the minimum signal level detected in the first level measurement. When the signal level falls below the minimum signal level, it is determined that the signal level satisfies the condition.

The predetermined condition is a graph showing the difference between the currently determined signal level and the signal level of the test output detected before the detection of the currently determined signal level, ie, a change in the signal level. Is reversed from a negative value to a positive value. When the inclination is reversed, it is determined that the signal level satisfies the condition. Further, this condition is satisfied when, for example, the measured signal level is a value equal to or less than the minimum signal level, and the slope obtained from the measured signal level and the signal level measured in the past is reversed. Is determined to be. Furthermore, even if these conditions are not satisfied, it is also determined that the conditions are satisfied when the current position of the detection position output from the rotation amount detection device reaches a predetermined target position.

If any one of the above conditions is satisfied, it is determined that the adjustment has been completed. At this time, the process proceeds from step b12 to step a13, where the level of the inspection output at the adjustment completion position is detected, and in step a14, it is determined whether or not the detected position is included in a predetermined standard. When not included in the standard,
In steps a5 to a17, it is determined whether or not the adjustment should be performed again. When starting over, step a1
In step 8, after the counter N is incremented by 1 and updated, the process returns to step a3, and the adjustment is performed again.

If it is determined that the adjustment should not be performed again, the failure of the adjustment is visually displayed on the display device in step a19, and then the processing operation of the flowchart is terminated. Also, in step a14, when the signal level is within the standard, it is also determined that the adjustment has been completed, and the process proceeds to step b20 to end the processing operation of the flowchart.

As described above, in this embodiment, the adjustment target position is determined, the adjustment element is moved toward the target position, and at the same time, the signal level change during the movement is detected, and the completion of the adjustment is determined. decide. This makes it possible to perform the adjustment reliably even when the target position cannot be accurately determined, for example, when a large amount of noise is superimposed on the inspection output at the time of the first level measurement.

FIG. 12 shows a minimum point at which the adjustment element is adjusted so that the signal level of the test output output from the electronic circuit including the adjustment element is minimized using the adjustment apparatus according to the third embodiment of the present invention. 5 is a flowchart illustrating an adjustment operation.

[0139] The adjusting device according to the present embodiment is similar to the adjusting device shown in FIG.
It has the same configuration as the adjusting device 11 of the embodiment. Further, the adjustment element for performing the level adjustment is adjusted by using the same method as the flowchart shown in FIG. FIG. 12 of the present embodiment
Has the same configuration as the flowchart of FIG. 3 of the first embodiment and the flowchart of FIG. 11 of the second embodiment. Steps for performing the same operation are denoted by the same reference numerals, and description thereof is omitted.

When the adjustment is started and the driver for rotating the adjustment element is fitted into the groove of the adjustment knob of the driver by the moving device, the process proceeds from step c1 to step a2. In step a2, a counter for counting the number of adjustments is reset, and the process proceeds to step a3. In steps a3 to a5, the first level measurement is performed.

When the measurement of the signal level is completed, a use range and a non-use range of the adjustment element are determined in step a6.
When the use range is determined, the minimum detection position where the signal level becomes the minimum level within the use range is extracted in step a7, and the process proceeds to step a9. In step a9, based on the extracted minimum detection position, the start position of the movement operation for moving the adjustment element to the target position is determined, and the process proceeds to step a10.

At step a10, the adjustment element is rotated in the reverse direction to return the current position of the signal level detection position to the start position. When the current position of the detected position is returned to the start position, the process proceeds from step a10 to step b11, and the adjustment element is rotated forward while driving the electronic device. At this time, the signal level of the test output of the adjustment element is detected at each of the detection positions that are simultaneously rotated by the predetermined resolution.

When the signal level is detected, step b1
From 1 the process proceeds to step c12, where it is determined whether the signal level satisfies a predetermined condition. The predetermined condition is, as described above, a condition for determining whether or not the measured signal level is equal to or less than the minimum signal level detected in the first level measurement. The condition is a condition for determining whether or not the slope obtained from the measured signal level and the signal level signal level measured in the past is reversed. Further, the condition is, for example, a condition for determining whether or not the measured signal level is a value equal to or less than the minimum signal level and whether the gradient of the signal level is reversed.

If any one of the above conditions is satisfied, it is determined that the adjustment has been completed. At this time, the process proceeds from step c12 to step a13, where the level of the inspection output at the adjustment completion position is detected, and in step a14, it is determined whether or not the detected position is included in a predetermined standard. When not included in the standard,
In steps a5 to a17, it is determined whether or not the adjustment should be performed again. When starting over, step a1
In step 8, after the counter N is incremented by 1 and updated, the process returns to step a3, and the adjustment is performed again.

When it is determined that the adjustment is not to be performed again, after the adjustment failure is visually displayed on the display device in step a19, the processing operation of the flowchart is terminated. In step a14, when the signal level is within the standard, it is determined that the adjustment is also completed, and the process proceeds to step a20 to end the processing operation of the flowchart.

As described above, in the present embodiment, the target position is not determined. In this way, when noise superimposition on the test output is particularly large, for example, only a rough estimate of the position where the adjustment element should be adjusted is obtained by the first level measurement, and the adjustment position is detected again while detecting the signal level of the test output. decide. As a result, the adjustment can be performed reliably even when adjusting an electronic circuit in which noise is superposed. Further, since the calculation of the target position is not performed, the adjustment operation can be speeded up accordingly.

[0147]

As described above, according to the present invention, there is provided an electronic apparatus for adjusting the overall characteristics by using an electronic circuit element whose electric characteristics can be adjusted by an external physical displacement operation. It is adjusted by the displacement operation of the member. At this time, the drive position output from the position detecting means for measuring the displacement amount of the operation member is set such that when the displacement direction of the operation member is reversed, the operation position is changed by, for example, backlash of a mechanism including a plurality of gears. An error occurs between the actual displacement position and the actual displacement position.

Therefore, when the control means displaces the operating member in a predetermined one direction in the entire predetermined range of the operating member and obtains the relationship between the signal level and the drive position in the entire range, the control means performs the control based on the relationship. And an adjustment position corresponding to a displacement position at which the operation member is displaced. Further, the control device moves the operation member in a direction opposite to the predetermined one movement direction beyond the adjustment position by at least an error to return the displacement position, and further reverses the movement direction to bring the displacement position to the adjustment position. .

As described above, by performing the reversal of the moving direction of the operating member twice, it is possible to cancel the shift due to the backlash of the gear. Therefore, the electronic circuit element can be accurately adjusted by using the operation member having the backlash or the like and the position adjusting means for detecting the displacement position.

Further, according to the present invention, the adjustment position of the operation member is a drive position corresponding to the maximum level or the minimum level of the electric signal level within the predetermined displacement range of the operation member. By obtaining this adjustment position,
The scanning of the level of the electric signal in the entire predetermined displacement range can be adjusted based only on the driving position output from the position detecting means. Therefore, the adjustment operation becomes easy.

[0151]

[0152]

[0153]

[0154]

[0155]

[0156]

[0157]

[0158]

[0159]

[0160]

[0161]

Furthermore, according to the present invention, in an adjusting device for an electronic apparatus having an electronic circuit element whose electric characteristics can be adjusted by a displacement operation of an operation member, the electronic circuit can be adjusted by operating a level change in the entire displacement range. Once the approximate drive position for adjusting the element is determined, the rotational direction of the electronic circuit element is reversed twice to offset the deviation, and the relationship between the output level of the electric signal of the electronic circuit element and the drive position is measured again. , To determine the final drive position. As described above, by performing the level measurement of the electronic signal again, the adjustment can be performed even when, for example, a large amount of noise is superimposed on the electric signal.

Further, according to the present invention, as described above, in the second operation of the level of the electric signal, the value of the level of the electric signal, which is a rough guide, is not less than the maximum level or not more than the minimum level. When detected,
The drive position is set as a final drive position.

Further, according to the present invention, in the second operation of the level of the electric signal, when the inclination at the time of displaying the level change in the graph is reversed, the drive position at that time is set as the final drive position. By setting a drive position that meets such conditions as the final drive position, the adjustment can be performed reliably.

Further, according to the present invention, in the adjusting device for an electronic device having an electronic circuit element whose electric characteristics can be adjusted by a displacement operation of the operation member, the first electric device can be operated over the entire displacement range of the operation member. Perform signal level operations. Based on this level of operation, the adjustment position of the electronic circuit element to be set is set. Further, the direction of rotation of the electronic circuit element is reversed twice so as to offset the displacement due to backlash or the like in the position detecting means. Finally, while rotating the electronic circuit element toward the adjustment position, the level of the electric signal at that time is detected, and when the level reaches a predetermined level, or when the electronic circuit element is at a position corresponding to the adjustment position. The adjustment is terminated when it has been reached. This makes it possible to reliably perform the adjustment even when the electric signal is superimposed with noise.

According to the present invention, in an adjusting device for adjusting an electronic device having an electronic circuit element whose electric characteristics can be adjusted by a displacement operation of an operating member so as to output a predetermined level, first, The electronic circuit element is adjusted so that the level of the electric signal reaches the adjustment start level. Furthermore, when the level of the electric signal reaches the coarse adjustment range from the drive position corresponding to the adjustment start level, the fine adjustment is performed while moving the electronic circuit element more slowly than when performing the coarse adjustment. Do. As described above, in one adjustment, the adjustment speed is set to two stages, and as the level of the electric signal approaches the optimum level to be adjusted, the rotation speed of the electronic circuit element is reduced. Thereby, the adjustment can be reliably performed. Further, by performing the automation, it is possible to reduce the adjustment time as compared with the adjustment operation that has been manually performed conventionally.

Further, according to the present invention, in the level adjustment of the electronic circuit, when the coarse adjustment is performed, the electronic circuit element is rotated at a predetermined steady speed. This ensures that the electronic circuit element can move to a position corresponding to the optimum level.

[0168]

Further, according to the present invention, when performing fine adjustment of the electronic circuit element, the control means performs adjustment within a predetermined fine adjustment range, and when the electronic circuit element exceeds the fine adjustment range, Once the electronic circuit element
After the rotation direction is reversed and returned to the fine adjustment start position, the rotation direction is further reversed and adjustment is performed again.
As a result, errors such as a deviation between the actual position of the electronic circuit element and the driving position of the position detecting means can be offset. Therefore, the adjustment can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an electrical configuration of an electronic apparatus adjustment device 11 according to a first embodiment of the invention.

FIG. 2 is a plan view showing a specific configuration of an adjustment element 13 of the electronic device 12, and an equivalent view of an electronic circuit including the adjustment element 13.

FIG. 3 is a flowchart illustrating a minimum point adjustment operation for adjusting an adjustment element 13 of an electronic device 12 using a first adjustment mechanism 18 of the adjustment device 11 of FIG.

FIG. 4 is a graph showing a relationship between a detection position of an adjustment element 13 and a signal level of an inspection output at each detection position.

FIG. 5 is a partially enlarged view of the vicinity of a detection position xd in the graph of FIG. 4;

6 is a flowchart for explaining a level adjustment operation for adjusting characteristics of an electronic circuit including the adjustment element 14 of the electronic device 12 using the second adjustment mechanism 19 of the adjustment device 11 of FIG.

FIG. 7 is a graph showing a signal level change of an inspection output output from an electronic circuit including an adjustment element 14.

FIG. 8 is a partially enlarged view of a vicinity of a predetermined adjustment target level Q in the graph of FIG. 7;

FIG. 9 is a graph showing a relationship between a rotation speed of a motor of a rotation drive device and drive power.

FIG. 10 is a waveform chart showing switching timing of the rotation speed of the adjusting element 14 in the coarse adjustment operation.

FIG. 11 is a flowchart illustrating a minimum point adjustment operation using the adjustment device according to the second embodiment of the present invention.

FIG. 12 is a flowchart illustrating a minimum point adjustment operation using the adjustment device according to the third embodiment of the present invention.

FIG. 13 is a diagram showing a positional relationship between an adjustment element 2 and a driver 5 of a conventional adjustment board 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 adjustment device 12 electronic device 13, 14 adjustment element 18 first adjustment mechanism 19 second adjustment mechanism 21, 22 driver 27, 28 rotation drive device 31, 32 processing circuit 34, 35 rotation control circuit 37, 38 rotation amount detection device 41 , 42 Level detection device 44, 45 Display device 47 Display device

Claims (5)

(57) [Claims] (1) An adjusting device for an electronic device including an electronic circuit element capable of adjusting an electric characteristic by a displacement operation of an operation member, (b) an electric signal from the electronic circuit element or an electronic circuit element (C) engaging the operating member and displacing the operating member in a predetermined one-moving direction and in a direction opposite to the one-moving direction; A driving means for driving; (d) a position detecting means provided in connection with the driving means for detecting a driving position corresponding to a displacement position of the operation member; and (e) an output of the level measuring means and the position detecting means. Control means for responding, wherein a maximum level or a minimum level of an electric signal to be measured is included in the operation member including a displacement position corresponding to an adjustment level to be adjusted of the electronic circuit element. The operating member is driven to be displaced in the one movement direction by the driving means within the displacement range to be determined, and the level of the electric signal detected by the level measuring means is made to correspond to the driving position detected by the position detecting means. The driving position corresponding to the local maximum level or the local minimum level of the electric signal stored in the memory is obtained. In the other moving direction, the driving position between the driving position detected by the position detecting means and the displacement position of the operating member is determined. The operation member is returned until the output of the position detecting means indicating a position exceeding the driving position corresponding to the local maximum level or the local minimum level of the electric signal by the value equal to or more than the error along the one movement direction is obtained, and the driving means is again used. While the operation member is displaced and driven in the one movement direction, the level of the electric signal is measured by the level measuring means. Therefore, the level of the detected electric signal is the position where the value above the maximum level or below the minimum level is detected, and the difference between the latest measurement result of the electric signal level and the past measurement result of the electric signal level. Either the position where the value changes from a positive value to a negative value or from a negative value to a positive value, or when the output of the position detecting means becomes the driving position corresponding to the maximum level or the minimum level A controller for driving the operation member to be displaced in the one movement direction by a driving unit until the operation device reaches the control position. 2. An adjusting apparatus for an electronic device, comprising: (a) an electronic circuit element capable of adjusting an electric characteristic by a displacement operation of an operation member; (b) an electric signal from the electronic circuit element or an electronic circuit element A level measuring means for measuring the level of an electric signal output from an electronic circuit including: (c) engaging with an operation member, in one predetermined moving direction and in the other moving direction opposite to the one moving direction; (D) position detecting means provided in connection with the driving means and detecting a driving position corresponding to the displacement position of the operating member; (e) level measuring means and position detecting means Control means responsive to the output of the electronic circuit element, the displacement level corresponding to the maximum level or the minimum level of the electric signal to be measured and corresponding to the adjustment level of the electronic circuit element to be adjusted. Within the predetermined displacement range of the working member, the operating member is displaced and driven in the one movement direction by the driving means, and the level of the electric signal detected by the level measuring means corresponds to the driving position detected by the position detecting means. Then, based on the driving position corresponding to the local maximum level or local minimum level of the electric signal stored in the memory, an adjustment position to be adjusted of the operation member is obtained. Position detecting means for indicating a position exceeding a driving position corresponding to a local maximum level or a local minimum level of an electric signal by a value equal to or more than the error along the one movement direction between the detected driving position and the displacement position of the operation member. The operation member is returned until an output is obtained, and the driving means is again driven to displace the operation member in the one movement direction. The level of the electrical signal detected by the level measuring means, the position where the level of the electrical signal detected above the maximum level or below the minimum level is detected, the latest measurement result of the level of the electrical signal and the electrical level Either the position where the value of the difference between the signal level and the past measurement result changes from a positive value to a negative value, or the position changes from a negative value to a positive value, or when the output of the position detecting means becomes the adjustment position Control means for driving the operating member in said one direction by driving means until said state is reached. 3. An adjusting apparatus for an electronic device having an electronic circuit element capable of adjusting electric characteristics by a displacement operation of an operation member, wherein: (b) an electric signal from the electronic circuit element or an electronic circuit element. (C) engaging the operating member and displacing the operating member in a predetermined one-moving direction and in a direction opposite to the one-moving direction; Driving means for driving; (d) position detecting means provided in connection with the driving means and detecting a driving position corresponding to the displacement position of the operating member; and (e) adjustment start level of the electric signal and optimization of the electric signal. A condition memory for storing a coarse adjustment range including a level and an optimum level; and (f) control means responsive to outputs of the level measuring means and the position detecting means, wherein the level measuring means measures The operation member is displaced and driven in a predetermined moving direction from the drive position corresponding to the adjustment start level stored in the condition memory to the coarse adjustment range stored in the condition memory, Drive position corresponding to the level of the electric signal within the adjustment range,
And a fine adjustment range including a drive position of the operating member corresponding to the optimum level of the electric signal stored in the condition memory from the optimum level of the electric signal, and a drive position corresponding to the level of the electric signal within the coarse adjustment range A driving device for driving the operation member in the moving direction until the level of the electric signal measured by the level measuring device reaches a fine adjustment range. 4. The control device according to claim 1, wherein the control unit is configured to operate at a predetermined steady speed in the moving direction from a drive position corresponding to the adjustment start level until the level of the electric signal measured by the level measurement unit reaches a coarse adjustment range. 4. The adjustment device for an electronic device according to claim 3, wherein the operation member is driven to be displaced. 5. The control unit according to claim 1, wherein the drive unit controls the drive signal from the drive position corresponding to the electric signal level within the coarse adjustment range until the level of the electric signal measured by the level measurement unit reaches the fine adjustment range. When the level of the electric signal detected by the level measuring unit is a value outside the fine adjustment range, the operation member is driven to be displaced in the moving direction, and the driving position corresponding to the level of the electric signal in the coarse adjustment range is set. 4. The adjusting device for an electronic device according to claim 3, wherein the operating member is driven to be displaced by the driving means in a moving direction opposite to the moving direction.