JP4238236B2 - Recording medium changer device and rotary tray stop program - Google Patents

Description

  The present invention relates to a recording medium changer device and a rotary tray stop program.

  2. Description of the Related Art Conventionally, a disc changer device has been proposed in which a plurality of disc-shaped recording media such as a DVD (Digital Versatile Disc) and a CD (Compact Disc) are accommodated and each disc can be selectively reproduced.

  In the conventional disk changer device described above, there are various disk storage formats. For example, a rotary tray method is known in which a plurality of grooves (hereinafter referred to as slots) extending radially in the radial direction are formed on a rotating disk, and the disk is held and stored by fitting the disk in a standing state. It has been. Such a rotary tray type disk changer device includes a motor for rotating the rotary tray, and moves a predetermined disk (slot) to a designated stop target position by controlling acceleration / deceleration of the rotation speed. . The rotational speed of the motor is controlled by the applied drive voltage.

  With reference to FIG. 12, the second drive control process for stopping the rotary tray to the stop target position in the disk changer device will be described. FIG. 12 shows the flow of the second drive control process.

  It is assumed that the conventional second drive control process is repeatedly executed at a predetermined period in the control unit of the disk changer device. Also, the second drive control process is started at the timing when the rotary tray stops and starts rotating. Although not shown in the flowchart of FIG. 12, it is assumed that the drive voltage of the motor that is rotationally driven to the brake point is set as appropriate. The brake point is a position where braking is started to be stopped in order to stop at the stop target position.

  First, it is determined whether or not the current (rotation) position of the predetermined slot of the rotary tray is within the brake point (step S71). If the current position of the rotary tray is within the brake point (step S71; YES), the drive voltage applied to the motor is determined according to the number of disks placed on the rotary tray (step S72). Then, it is determined whether or not the current position of the rotary tray is the stop target position (step S73). If the current position of the rotary tray is not the stop target position (step S73; NO), the process proceeds to step S72.

  When the current position of the rotary tray is the stop target position (step S73; YES), the motor is stopped (step S74), and the second drive control process ends. If the current position of the rotary tray is not within the brake point (step S71; NO), the second drive control process ends.

Similarly, a configuration is conceived in which the brake tray is set differently depending on the number of disks on the rotary tray and the arrangement state thereof, and the rotary tray is accurately stopped at the stop target position regardless of the number of disks and the arrangement state. (For example, refer to Patent Documents 1 and 2).
Japanese Patent No. 3466460 Japanese Patent No. 3413757

  However, the conventional configuration has a problem that the brake time varies greatly depending on the weight of the disk on the rotary tray (the number of disks), and the disk replacement time also varies greatly. Further, regarding the disk arrangement on the rotary tray, there is a problem that it is difficult to set the drive voltage when the disk is arranged biased to one side. Furthermore, there is a problem that the temperature (room temperature) has a great influence on the motor operation.

  An object of the present invention is to make the rotary tray brake time constant and accurately stop the rotary tray at the stop target position regardless of the number of recording media, the arrangement, and the temperature.

In order to solve the above-mentioned problem, the invention described in claim 1
A rotary tray formed with a plurality of slots for storing recording media one by one;
Position detecting means for detecting the position of the slot;
Timing detection means for detecting timing information that is a detection time width of each slot through which the slot passes a predetermined reference position;
Drive means for rotationally driving the rotary tray;
Storage means for storing ideal timing information as timing information for stopping the slot at the stop target position according to the position of the slot of the rotary tray;
Based on the position information detected by the position detection means, the drive means is driven and controlled to stop the designated slot of the rotary tray at the stop target position, and the timing information detected by the timing detection means And a control means for adjusting the driving force of the driving means so as to approach the ideal timing information stored in the storage means.

The invention according to claim 2 is the recording medium changer device according to claim 1,
The control means adjusts the driving force by changing a voltage applied to the driving means.

The invention according to claim 3 is the recording medium changer device according to claim 1 or 2 ,
The control means calculates a difference between the detected timing information and the ideal timing information, and adjusts the driving force of the driving means so as to reduce the calculated difference.

The invention according to claim 4
On the computer,
A function of detecting the position of the slot of the rotary tray in which a plurality of slots for storing recording media one by one are formed;
A function of detecting timing information that is a detection time width of each slot through which the slot passes a predetermined reference position;
A function for storing ideal timing information as timing information for stopping the slot at the stop target position according to the position of the slot of the rotary tray;
Based on the detected position information, the rotary tray is rotated and controlled to stop the designated slot of the rotary tray at the stop target position, and the detected timing information is stored in the stored ideal A function of adjusting the driving force of the rotational drive so as to approach the timing information;
It is a rotary tray stop program for realizing the above.

  According to the present invention, the brake time of the rotary tray can be made constant and the rotary tray can be accurately stopped at the stop target position regardless of the number of recording media, the arrangement, and the temperature.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

  The disc changer device 10 of the present embodiment will be described with reference to FIGS. FIG. 1 shows an operation unit 10 </ b> A provided on the front surface of the disk changer device 10. FIG. 2 shows the configuration of the disk storage unit 100 of the disk changer device 10. FIG. 3A shows waveforms of signals PH1, PH2, and PH3 output from the first sensor 104a, the second sensor 104b, and the third sensor 104c, respectively. FIG. 3B shows waveforms of signals PH1 and PH2 output from the first sensor 104a and the second sensor 104b, and a disk presence / absence detection signal output from the disk presence / absence detection sensor 104d. FIG. 4 shows the configuration of the control system of the disk changer device 10.

  The disc changer device 10 can store a maximum of 400 discs, but the number of discs that can be stored is not limited to 400, and other discs such as 200, 150, etc. Good. Further, in the present embodiment, a description will be given assuming a DVD as a disk stored in the disk changer device 10.

  As shown in FIG. 1, a disk exchange port 10a and a display device 10b are provided in an operation unit 10A provided on the front surface of the disk changer device 10, and a disk exchange port opening / closing key 10c and a reproduction key are used as operation keys. 10d, a stop key 10e, a rotary tray operation dial 10f, a numeric keypad 10g, and the like are provided.

  The disk exchange port 10a is opened and closed by a key operation or the like of the disk exchange port opening / closing key 10c, and a predetermined number of disks can be exchanged with the disk exchange port 10a opened. As will be described later, the display device 10 b displays various display data output from the microcomputer 106. Examples of the display data include an operating state during reproduction or pause, a slot number located at the center of the disk exchange port 10a, a slot number of a disk being reproduced, and the like.

  The reproduction key 10d outputs an instruction signal to the microcomputer 106 to reproduce the data on the disc in the slot designated in advance in response to a key operation by the user. The stop key 10e outputs an instruction signal to the microcomputer 106 to stop the currently executed disc playback process in response to a key operation by the user.

  The rotary tray operation dial 10f outputs a signal for instructing the rotation operation of the rotary tray 101 to the microcomputer 106 in response to a dial operation by the user. The numeric keypad 10g outputs a slot number in which a reproduction target disc is loaded, a reproduction target track number (song number), and the like to the microcomputer 106 in accordance with a key operation by the user.

  Next, the disk storage unit 100 of the disk changer device 10 will be described with reference to FIG. As shown in FIG. 2, the disk storage unit 100 includes a rotary tray 101, a rotary tray control motor 102 as a driving unit, a disk arm 103, a sensor support plate 104, a position detection unit and a timing detection unit. The first sensor 104a, the second sensor 104b, the third sensor 104c, the disk presence / absence detection sensor 104d, and the like are installed on the substrate 105, and signal lines indicated by reference numerals A1 to A6 in FIG. 106 and its peripheral circuits.

  The rotary tray 101 has 400 slots extending in the radial direction from the center thereof, and holds and stores the disk by standing the disk on these slots. Installed in the department. The rotary tray 101 is rotated by power supplied from the rotary tray control motor 102.

  The rotary tray control motor 102 drives the rotary tray 101 in accordance with a control signal output from the rotary tray control motor driver 110 via a signal line indicated by reference numeral A6 in the figure, and performs an accurate rotation operation on the rotary tray 101. Make it.

  The disk arm 103 operates in response to a control signal transmitted from the disk arm control motor driver 111 via a signal line indicated by reference numeral A5 in the drawing. That is, in response to the control signal, one disk in the slot at the disk transport position facing the disk arm 103 is pulled out, this disk is set in a playback device (not shown), and after playback, it is stored in the original slot again. To do.

  Next, the first sensor 104a, the second sensor 104b, the third sensor 104c, and the disk presence / absence detection sensor 104d will be described.

  The first sensor 104 a and the second sensor 104 b are installed at predetermined reference positions on the substrate 105 and below the rotary tray 101. These detect individual slots (disk storage locations) and detect the rotation direction of the rotary tray 101.

  The first sensor 104a and the second sensor 104b are installed on two different moving radii extending radially from the rotation center axis of the rotary tray 101, and are further installed at different distances from the rotation center of the rotary tray 101. Is done. Further, the installation positions of the first sensor 104a and the second sensor 104b are such that the signal PH1 output from the first sensor 104a and the signal PH2 output from the second sensor 104b are mutually connected by the rotation operation of the rotary tray 101. It is installed at a position where it occurs with a 1/4 cycle shift (see FIG. 3).

  The first sensor 104a outputs a signal PH1 generated by the rotation operation of the rotary tray 101 to the microcomputer 106 via the signal line indicated by reference numeral A1 in the figure, and the second sensor 104b also outputs via the signal line indicated by reference numeral A2 in the figure. Then, the signal PH2 generated by the rotation operation of the rotary tray 101 is output to the microcomputer 106.

  The third sensor 104c is installed on the substrate 105 and outputs a signal PH3 used when specifying the position of the rotary tray 101. The third sensor 104c generates a signal PH3 by the rotation operation of the rotary tray 101, and outputs the signal PH3 to the microcomputer 106 via a signal line indicated by reference numeral A3 in the drawing.

  The rotary tray 101 is provided with a plurality of sections in the circumferential direction where the signal PH3 is “Low”, and the number of slots formed in each section is different from each other (for example, as shown in FIG. 3A). The “Low” section of the signal PH3 shown corresponds to the section of three slots).

  The disk presence / absence detection sensor 104d is installed on the sensor support plate 104 installed on the top of the rotary tray 101, and detects the presence / absence of a disk in the slot. The disk presence / absence detection sensor 104d outputs a detection signal indicating the presence / absence of a disk in the slot to the microcomputer 106 via a signal line indicated by reference numeral A4 in the drawing.

  Here, referring to FIGS. 3A and 3B, the position and rotation direction of the rotary tray 101 are specified, and the presence or absence of a disk on the slot of the rotary tray 101 is specified (both are performed by the microcomputer 106). Will be described in detail.

Reference numerals C1 to C5 in the figure indicate count timings when the microcomputer 106 counts slots one by one. This count timing occurs only when the signals PH1 and PH2 are both “Low”, and in other cases, the count timing does not occur.
Note that the count timings indicated by reference numerals C1 to C5 in the drawing exemplify a part of a plurality of count timings that occur during actual operation.

Identifying the position of the rotary tray 101:
By counting the number of count timings (the number of slots) included in the “Low” section of the signal PH3, the position of the predetermined slot of the rotary tray 101 can be specified. That is, the number of Low sections of the signal PH1 included in the Low section of the signal PH3 is associated with the number of slots on the rotary tray 101 grouped in advance, and the number of slots in each group is different.

Specifying the rotation direction of the rotary tray 101:
The phases of the signals PH1 and PH2 are shifted from each other by a quarter period. If the rotation direction of the rotary tray 101 is reversed, the phase is also reversed and the signals PH1 and PH2 in FIG. That is, the rotation direction of the rotary tray 101 is specified from the phases of the signals PH1 and PH2.
For example, when the signal PH1 is switched to “High” after both the signals PH1 and PH2 are counted “Low”, the rotation direction of the rotary tray 101 is specified as the right rotation, and the signal PH2 is switched to “High”. Then, the rotation direction of the rotary tray 101 is specified as the left rotation.

Identifying the presence of a disk:
As shown in FIG. 3B, the disk presence / absence detection sensor 104d outputs a “High” signal as a standard value. When the count timing is generated by the rotation operation of the rotary tray 101, if a disk is stored in the slot corresponding to the count timing, the disk presence / absence detection sensor 104d continuously outputs the standard value, and the microcomputer 106 Stores this data in RAM.
On the other hand, when the count timing is generated by the rotation operation of the rotary tray 101, if no disk is stored in the slot corresponding to the count timing, the disk presence / absence detection sensor 104d outputs one pulse of the “Low” signal, The microcomputer 106 stores this data in the RAM.

  Next, the configuration of the control system of the disk changer device 10 will be described in detail with reference to FIG.

  As shown in FIG. 4, the disk changer device 10 includes a microcomputer 106 as a control means, an input unit 107, a display unit 108, an exchange opening / closing control motor driver 109, a rotary tray control motor driver 110, and a disk arm control motor driver 111. , DSP 112, pickup unit 113, load / unload SW 114, exchange port opening / closing control motor 115, memory 116 as storage means, and the like. The input unit 107, display unit 108, pickup unit 113, load / unload SW 114 And each part except the exchange port opening / closing control motor 115 is mutually connected by the some bus | bath.

The microcomputer 106 has a CPU (Central Processing Unit) or R (not shown).
An OM (Read Only Memory) and a RAM (Random Access Memory) are provided, and the disc changer device 10 is comprehensively controlled. The ROM stores a main control program for controlling the disk changer device 10 and various application programs related to the program. The RAM temporarily stores execution files of the various programs and various data generated during the execution. Stored. Various processes are executed in cooperation with various programs stored in the RAM and the CPU.

  The microcomputer 106 receives the output signals of the first sensor 104a, the second sensor 104b, the third sensor 104c, and the disk presence / absence detection sensor 104d via the signal lines indicated by reference numerals A1 to A4 in the drawing, and converts the received signals into the received signals. Based on this, various position data for controlling the operation of the rotary tray 101 are calculated and stored in the RAM.

  The microcomputer 106 opens and closes the exchange port 10a, rotates the rotary tray 101, operates the disc arm 103, or a playback device (with a disc set) according to various operation signals input via the input unit 107. The reproduction processing performed by the (not shown) is controlled.

  As described above, the microcomputer 106 determines the position and rotation direction of the rotary tray 101 and the presence / absence of a disk based on the output signals of the first sensor 104a, the second sensor 104b, the third sensor 104c, and the disk presence / absence detection sensor 104d. Is identified.

  The microcomputer 106 controls the voltage applied to the rotary tray control motor 102 for rotating (moving) the rotary tray 101 and stops the rotary tray 101 according to an ideal value as ideal timing information described later. The adjustment control of the voltage applied to the rotary tray control motor 102 for stopping at is performed.

  The input unit 107 includes a disk exchange port opening / closing key 10c, a reproduction key 10d, a stop key 10e, a rotary tray operation dial 10f, a numeric keypad 10g, and the like related to the operation of the disk changer device 10. When these operation keys and operation dial are operated, the operation signal is input to the microcomputer 106.

  The display unit 108 includes a display device 10b such as an LCD (Liquid Crystal Display). The display unit 108 displays various display data transmitted from the microcomputer 106 on the display device 10b. For example, the track number of the disc being reproduced, the TOC data of the disc being reproduced, various operation modes of the disc changer device 10 (during rotational movement or disc search, etc.), the open / close state of the exchange port 10a, etc. are displayed.

  The exchange port opening / closing control motor driver 109 drives an exchange port opening / closing control motor 115 for opening / closing the exchange port 10 a based on a control signal transmitted from the microcomputer 106.

  The rotary tray control motor driver 110 generates a voltage for rotating the rotary tray 101 based on a control signal transmitted from the microcomputer 106 and applies the voltage to the rotary tray control motor 102 for driving.

  The disk arm control motor driver 111 drives a disk arm control motor (not shown) for operating the disk arm 103 based on a control signal transmitted from the microcomputer 106.

  A DSP (Digital Signal Processor) 112 converts the content data output from the pickup unit 113 into a data format that can be processed by the microcomputer 106 at high speed, and transmits the data to the microcomputer 106.

  The pickup unit 113 reads disc-related data, content data, copyright data, and the like recorded in advance on a disc set in the playback device (not shown).

  The load / unload SW 114 reads disk-related data from the disk when a disk is newly set to the playback apparatus (not shown) or when the disk is released (ejected) from the playback apparatus. Then, a signal instructing whether to clear the disk-related data already read is transmitted to the microcomputer 106.

  The memory 116 is configured by a nonvolatile memory such as a ROM or a flash memory, and stores various types of information. The memory 116 stores an ideal value and an ideal voltage described later.

  Next, the operation of the disk changer device 10 will be described with reference to FIGS. Here, an operation of applying a brake while rotating the rotary tray 101 to stop a predetermined slot of the rotary tray 101 at the stop target position will be described.

  Referring to FIG. 5, an ideal signal PH1 high time (hereinafter referred to as an ideal value), which is performed in advance before a first drive control process described later, and a rotary tray control motor 102 corresponding to the ideal value. The measurement of the drive voltage (hereinafter referred to as an ideal voltage) will be described. FIG. 5A shows an example of an ideal value and an ideal voltage corresponding to the position of the rotary tray 101. FIG. 5B shows the waveform of the signal PH1 corresponding to FIG.

  In this embodiment, the signal PH1 is used as a signal corresponding to each slot of the rotary tray 101, but the signal PH2 may be used.

  When a predetermined number of disks are placed on the rotary tray 101 at a predetermined temperature, the rotary tray control motor 102 is driven to rotate the rotary tray 101 under the control of the microcomputer 106, and when the brake is applied, The rotary tray control motor 102 is driven by applying a predetermined voltage to stop the predetermined slot of the rotary tray 101 at the stop target position. At this time, the waveform of the signal PH1 detected by the first sensor 104a is measured under the control of the microcomputer 106, and based on the waveform and the like, the position (in a predetermined slot) of the rotary tray 101 (current position to the stop target position) The high time of the signal PH1 and the voltage value applied to the rotary tray control motor 102 according to the position) are measured. As this measurement value, the value and timing of the voltage applied to the rotary tray control motor 102 are changed and the rotary tray 101 is stopped cleanly.

  The above measurement is performed by changing the conditions of the number of disks (for example, 0, 100, 200, 300, 400) of the rotary tray 101 and the temperature (for example, 0 degrees, 50 degrees, normal temperature). Then, the average value of the measured values obtained under these plural conditions is calculated, and the average value of the high time of the signal PH1 corresponding to the position of the predetermined slot of the rotary tray 101 is set as an ideal value. The average value of the applied voltages is the ideal voltage.

  For example, as shown in FIG. 5A, an ideal value and an ideal voltage that are one to ten disks (slots) before the stop target position of the rotary tray 101 are created. The farthest position to the stop target position of the rotary tray 101 corresponding to the ideal value and the ideal voltage is not limited to the front of 10 disks, and may be more or less than 10 sheets.

  The waveform W1 of the signal PH1 shown in FIG. 5B is a waveform when the rotary tray 101 is driven and controlled with the ideal value shown in FIG. 5A, and the High time of each wave of the waveform W1 is the ideal value. It has become. The created ideal value and ideal voltage are stored in the memory 116.

  Next, the first drive control process will be described with reference to FIGS. FIG. 6 shows the flow of the first drive control process. FIG. 7 shows the flow of the comparison process between the ideal value and the actual measurement value of the first drive control process. FIG. 8 shows a flow of the voltage drop setting process of the comparison process between the ideal value and the actual measurement value. FIG. 9 shows the flow of the voltage rise setting process of the comparison process between the ideal value and the actual measurement value. FIG. 10 shows the flow of the voltage setting process of the first drive control process.

  The first drive control process is a process of adjusting the drive voltage applied to the rotary tray control motor 102 so that the measured value of the high time of the signal PH1 approaches the ideal value, and stopping the rotary tray 101 at the stop target position. is there. The first drive control process is repeatedly executed until the rotary tray 101 is stopped (in a predetermined cycle).

  For example, movement of the rotary tray 101 (for example, rotational movement to the position of the disk exchange port 10a in the designated slot designated by the user via the input unit 107) is input via the rotary tray operation dial 10f of the input unit 107. In the microcomputer 106, the rotary tray 101 is driven to rotate and the rotary tray 101 enters the brake point or the predetermined time has elapsed since the end of the execution of the first drive control process. The first drive control process is executed in cooperation with the first drive control program read from the ROM and appropriately expanded on the RAM and the CPU.

  First, it is determined whether or not the signal PH1 detected by the first sensor 104a as a photosensor becomes High (step S1). When the signal PH1 is not High (step S1; NO), the process proceeds to step S1. When the signal PH1 becomes High (Step S1; YES), measurement of the High time (hereinafter, measured value) of the signal PH1 detected by the first sensor 104a is started (Step S2).

  And it is discriminate | determined whether signal PH1 detected by the 1st sensor 104a became Low (step S3). When the signal PH1 is not Low (step S3; NO), the process proceeds to step S3. When the signal PH1 becomes Low (step S3; YES), the measurement of the High time (actual value) of the signal PH1 detected by the first sensor 104a is finished (step S4).

  Then, a comparison process between the ideal value and the actually measured value is executed (step S5). Then, the voltage setting process is executed (step S6), and the first drive control process ends.

  With reference to FIG. 7, the ideal value and actual value comparison processing in step S5 will be described. First, after execution of step S4, an ideal value corresponding to the current position of the rotary tray 101 (current position to the stop target position of a predetermined slot of the rotary tray 101) is read from the memory 116, and the read ideal value and The measured values measured in steps S2 and S4 are compared, and it is determined whether or not ideal value> measured value (step S51). When the ideal value> the actual measurement value (step S51; YES), the voltage drop setting process is executed (step S52), and the comparison process between the ideal value and the actual measurement value ends. If the ideal value is not the actual measurement value (step S51; NO), it is determined whether the ideal value is less than the actual measurement value (step S53).

  When the ideal value <the actual measurement value (step S53; YES), the voltage increase setting process is executed (step S54), and the comparison process between the ideal value and the actual measurement value ends. When the ideal value <the actual measurement value is not satisfied (step S53; NO), the ideal value = the actual measurement value, and the adjustment voltage b = 0 [V] for adjusting the drive voltage is set (step S55). The comparison process ends.

  With reference to FIG. 8, the voltage drop setting process of step S52 will be described. First, in the case of YES in step S51, (ideal value-actual value) is calculated, and it is determined whether (ideal value-actual value) is less than 2.0 [ms] (step S521). When (ideal value−actual value) is less than 2.0 [ms] (step S521; YES), the adjustment voltage b = 0 [V] is set (step S522), and the voltage drop setting process is terminated. If (ideal value-actual value) is not less than 2.0 [ms] (step S521; NO), it is determined whether (ideal value-actual value) is less than 4.0 [ms] (step). S523).

  When (ideal value−actual value) is less than 4.0 [ms] (step S523; YES), the adjustment voltage b = −0.2 [V] is set (step S524), and the voltage drop setting process is completed. To do. If (ideal value−actual value) is not less than 4.0 [ms] (step S523; NO), it is determined whether (ideal value−actual value) is less than 6.0 [ms] (step). S525). When (ideal value−actual value) is less than 6.0 [ms] (step S525; YES), the adjustment voltage b = −0.4 [V] is set (step S526), and the voltage drop setting process ends. To do. If (ideal value−actual value) is not less than 6.0 [ms] (step S525; NO), it is determined whether (ideal value−actual value) is less than 8.0 [ms] (step). S527).

  When (ideal value−actual value) is less than 8.0 [ms] (step S527; YES), the adjustment voltage b = −0.6 [V] is set (step S528), and the voltage drop setting process ends. To do. If (ideal value-actual value) is not less than 8.0 [ms] (step S527; NO), it is determined whether (ideal value-actual value) is less than 10.0 [ms] (step). S529). When (ideal value−actual value) is less than 10.0 [ms] (step S529; YES), the adjustment voltage b = −0.8 [V] is set (step S530), and the voltage drop setting process ends. To do. When (ideal value−actual value) is not less than 10.0 [ms] (step S529; NO), the adjustment voltage b = −1.0 [V] is set (step S531), and the voltage drop setting process ends. .

  With reference to FIG. 9, the voltage increase setting process of step S54 is demonstrated. First, in the case of YES in step S53, the actual measurement value-ideal value is calculated, and it is determined whether (actual measurement value-ideal value) is less than 2.0 [ms] (step S541). When (actually measured value−ideal value) is less than 2.0 [ms] (step S541; YES), the adjustment voltage b = 0 [V] is set (step S542), and the voltage increase setting process ends. If (actually measured value−ideal value) is not less than 2.0 [ms] (step S541; NO), it is determined whether (actually measured value−ideal value) is less than 4.0 [ms] (step). S543).

  When (actual measurement value−ideal value) is less than 4.0 [ms] (step S543; YES), the adjustment voltage b is set to +0.2 [V] (step S544), and the voltage increase setting process is completed. . If (actually measured value−ideal value) is not less than 4.0 [ms] (step S543; NO), it is determined whether or not (actually measured value−ideal value) is less than 6.0 [ms] (step). S545). When (actually measured value−ideal value) is less than 6.0 [ms] (step S545; YES), the adjustment voltage b is set to +0.4 [V] (step S546), and the voltage increase setting process ends. . If (actually measured value−ideal value) is not less than 6.0 [ms] (step S545; NO), it is determined whether (actually measured value−ideal value) is less than 8.0 [ms] (step). S547).

  When (actually measured value−ideal value) is less than 8.0 [ms] (step S547; YES), the adjustment voltage b is set to +0.6 [V] (step S548), and the voltage increase setting process ends. . If (actually measured value−ideal value) is not less than 8.0 [ms] (step S547; NO), it is determined whether (actually measured value−ideal value) is less than 10.0 [ms] (step). S549). When (actually measured value−ideal value) is less than 10.0 [ms] (step S549; YES), the adjustment voltage b is set to +0.8 [V] (step S550), and the voltage increase setting process ends. . If (actually measured value−ideal value) is not less than 10.0 [ms] (step S549; NO), the adjustment voltage b is set to +1.0 [V] (step S551), and the voltage increase setting process ends.

  With reference to FIG. 10, the voltage setting process of step S6 will be described. First, after executing step S5, the ideal voltage corresponding to the current position of the rotary tray 101 is read from the memory 116, and the read ideal voltage is set as a (step S61). Then, a + b is calculated from the ideal voltage a set in step S61 and the adjustment voltage b set in step S5 (step S62). Then, the drive voltage applied to the rotary tray control motor 102 is determined and set to (a + b) calculated in step S62 (step S63), and the voltage setting process ends. The voltage set in step S63 is applied to the rotary tray control motor 102 via the rotary tray control motor driver 110 under the control of the microcomputer 106.

  Here, a specific example of the first drive control process will be described with reference to FIG. FIG. 11A shows an example of measured values and ideal voltages for the position of the rotary tray 101. FIG. 11B shows the waveform of the signal PH1 in the voltage setting example corresponding to FIG.

  As shown in FIG. 5A, a case where measured values are measured as shown in FIG. 11A with respect to the ideal value and the ideal voltage with respect to the position of the rotary tray 101 will be considered. For example, consider the first drive control process that is executed from the front of six disks (six slots) where the predetermined slot of the rotary tray 101 is at the stop target position.

  As shown in FIGS. 11A and 11B, the drive voltage applied to the rotary tray control motor 102 is set to the ideal voltage 3 [V] at the position 6 disks before the stop target position. In steps S2 and S4 of the first drive control process, the actual measurement value is measured as 54.0 [ms], the ideal value at that position is 48.0 [ms], and the actual measurement value is later than the ideal value. Yes. Therefore, in steps S5 and S6, the drive voltage applied to the rotary tray control motor 102 is set to ideal voltage 3 [V] + adjustment voltage 0.6 [V] = 3.6 [V].

  As a result, the actual rotational speed of the rotary tray 101 is increased and brought closer to the ideal rotational speed. In particular, if the rotation speed of the rotary tray 101 is reduced too much, the rotation may be stopped, and the rotation stop can be prevented by adjusting the rotation speed by the first drive control process.

  The measured value is measured as 55.0 [ms] in steps S2 and S4 of the first drive control process at the position five disks before the stop target position, and the ideal value at that position is 52.0 [ms]. The measured value is still slower than the ideal value. Therefore, in steps S5 and S6, the drive voltage applied to the rotary tray control motor 102 is set to the ideal voltage 3.0 [V] + the adjustment voltage 0.2 [V] = 3.2 [V]. As a result, the actual rotational speed of the rotary tray 101 is increased and brought closer to the ideal rotational speed.

  Then, at the position before the stop target position four disks, the actually measured value is measured to be 56.0 [ms] in steps S2 and S4 of the first drive control processing, and the ideal value of the position is 56.0 [ms]. The measured value is equal to the ideal value. Therefore, in steps S5 and S6, the drive voltage applied to the rotary tray control motor 102 is set to the ideal voltage 3.0 [V]. Thereby, the actual rotational speed of the rotary tray 101 is maintained at the ideal rotational speed. Thereafter, similarly, the first drive control process is repeatedly executed until the rotary tray 101 stops at the stop target position.

  As described above, according to the present embodiment, the drive voltage applied to the rotary tray control motor 102 is adjusted so that the actually measured value is always close to the ideal value, so the number of disks placed on the rotary tray 101, the number of disks Regardless of the arrangement and the temperature, the brake time of the rotary tray 101 can be made constant based on the ideal value, the disk replacement time can be made constant, and the predetermined slot can be stopped accurately at the stop target position.

  In addition, since the actual measurement value and the ideal value are used as the high time width of each slot of the signal PH1, it is possible to easily acquire the actual measurement value and set the ideal value. Further, since the drive voltage applied to the rotary tray control motor 102 is adjusted to be increased or decreased in accordance with the magnitude of the difference between the actual value and the ideal value so as to reduce the difference between the actual value and the ideal value. The tray 101 can be prevented from stopping before stopping at the stop target position, and the actual measurement value can be easily adjusted to approach the ideal value.

  The description in the above embodiment is an example of the recording medium changer device and the rotary tray stop program according to the present invention, and the present invention is not limited to this.

  For example, in the above embodiment, in the calculation of the ideal value and the ideal voltage, the measurement value is measured by changing the number of disks in the rotary tray and the temperature conditions. However, the present invention is not limited to this, and the disk in the rotary tray is not limited thereto. The measured value may be measured under other conditions such as arrangement (bias).

  Further, although the disk-shaped DVD is used as the recording medium, the present invention is not limited to this. For example, it may be an optical information recording medium such as a disc-shaped CD, CD-R / RW (Recordable / ReWritable), DVD-R / RW, or a next-generation high-density information recording medium using a blue laser. Further, a recording medium (MD (Mini Disc) or the like) that is not a disk shape may be used as the recording medium, and the recording medium may be changed by a rotary tray.

  In addition, the detailed configuration and detailed operation of the disk changer device 10 in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

2 is a diagram showing an operation unit 10A provided on the front surface of the disk changer device 10. FIG. 2 is a plan view showing a configuration of a disk storage unit 100 of the disk changer device 10. FIG. (A) is a timing chart of signals PH1, PH2, and PH3 output from the first sensor 104a, the second sensor 104b, and the third sensor 104c, respectively. (B) is a timing chart of signals PH1 and PH2 output from the first sensor 104a and the second sensor 104b, respectively, and a disk presence / absence detection signal output from the disk presence / absence detection sensor 104d. 2 is a block diagram showing a configuration of a control system of the disk changer device 10. FIG. (A) is a figure which shows an example of the ideal value and ideal voltage corresponding to the position of the rotary tray 101. FIG. (B) is a timing chart of the signal PH1 corresponding to (a). It is a flowchart which shows a 1st drive control process. It is a flowchart which shows the comparison process of the ideal value and measured value of a 1st drive control process. It is a flowchart which shows the voltage drop setting process of a comparison process of an ideal value and an actual value. It is a flowchart which shows the voltage rise setting process of the comparison process of an ideal value and an actual value. It is a flowchart which shows the voltage setting process of a 1st drive control process. (A) is a figure which shows an example of the measured value with respect to the position of the rotary tray 101, and an ideal voltage. (B) is a timing chart of the signal PH1 in the voltage setting example corresponding to (a). It is a flowchart which shows a 2nd drive control process.

Explanation of symbols

10 Disc changer device 10a Disc exchange port 10b Display device 10c Disc exchange port opening / closing key 10d Playback key 10e Stop key 10f Rotary tray operation dial 10g Numeric keypad 100 Disc storage unit 101 Rotary tray 102 Rotary tray control motor 103 Disc arm 104 Sensor support plate 104a First sensor 104b Second sensor 104c Third sensor 104d Disc presence / absence detection sensor 105 Substrate 106 Microcomputer 107 Input unit 108 Display unit 109 Exchange port opening / closing control motor driver 110 Rotary tray control motor driver 111 Disc arm control motor driver 112 DSP
113 Pickup unit 114 Load / unload SW
115 Exchange port opening / closing control motor 116 Memory

Claims (4)

A rotary tray formed with a plurality of slots for storing recording media one by one;
Position detecting means for detecting the position of the slot;
Timing detection means for detecting timing information that is a detection time width of each slot through which the slot passes a predetermined reference position;
Drive means for rotationally driving the rotary tray;
Storage means for storing ideal timing information as timing information for stopping the slot at the stop target position according to the position of the slot of the rotary tray;
Based on the position information detected by the position detection means, the drive means is driven and controlled to stop the designated slot of the rotary tray at the stop target position, and the timing information detected by the timing detection means And a control means for adjusting the driving force of the driving means so as to approach the ideal timing information stored in the storage means.   The recording medium changer device according to claim 1, wherein the control unit adjusts the driving force by changing a voltage applied to the driving unit. The control unit calculates a difference between the detected timing information and the ideal timing information, and adjusts a driving force of the driving unit so as to reduce the calculated difference. Or a recording medium changer device according to 2; On the computer,
A function of detecting the position of the slot of the rotary tray in which a plurality of slots for storing recording media one by one are formed;
A function of detecting timing information that is a detection time width of each slot through which the slot passes a predetermined reference position;
A function for storing ideal timing information as timing information for stopping the slot at the stop target position according to the position of the slot of the rotary tray;
Based on the detected position information, the rotary tray is rotated and controlled to stop the designated slot of the rotary tray at the stop target position, and the detected timing information is stored in the stored ideal A function of adjusting the driving force of the rotational drive so as to approach the timing information;
Rotary tray stop program to realize.

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