KR0179085B1 - Device for checking automatic compensation function for cd-rom drive - Google Patents

Abstract

The present invention relates to an apparatus and method for checking an automatic correction function of a CD-ROM drive for checking a function of self-correcting a defect of a CD-ROM in an assembly line of a CD-ROM drive. Reliability because the CD-ROM drive is automatically driven after the ROM drive is connected to the microcomputer automatically and whether the disk defects formed on the disc for checking the calibration function driven by the CD-ROM drive are corrected. This high inspection can be done, inspection time is shortened and the cost savings from automated equipment can be achieved.

Description

Device and method for checking auto calibration function of CD-ROM drive

1 is a block diagram showing an apparatus for checking a calibration function of a conventional CD-ROM drive.

2 is a flowchart showing a calibration function test method of a conventional CD-ROM drive.

3 is a diagram showing a disk for checking a general correction function.

4 is an error signal waveform due to a general disk defect,

(a) is error signal waveform due to interrupt.

(b) is the error signal waveform due to black dots.

(c) shows the error signal waveform due to the fingerprint.

5 is an overall block diagram showing an automatic calibration function test apparatus for a CD-ROM drive according to the present invention.

6 is an internal block diagram of a microcomputer according to the present invention.

7 is an internal block diagram of a signal measuring unit according to the present invention.

8 is a flowchart illustrating a method for checking an automatic correction function of a CD-ROM drive according to the present invention.

* Explanation of symbols for main parts of the drawings

11: CD-ROM drive 12: Disk for checking calibration function

13: micom 14: monitor

21: conveyor 22: pallet

23: stopper 24: button press device

25 pneumatic pad 26 pneumatic cylinder

27: power cable 28: interface cable

29 audio cable 30 control unit

31: PLC 32: signal measuring unit

41: band elimination filter 42: counter

43: buffer

The present invention relates to an apparatus and method for inspecting a CD-ROM drive, and more particularly, to an apparatus for automatically checking a CD-ROM drive for checking a function of correcting a defect of a CD-ROM in an assembly line of a CD-ROM drive. It is about a method.

Generally, records, magnetic tapes, magnetic disks, and the like have been widely used as a storage medium for storing information. However, in recent years, a compact disk (hereinafter referred to as a CD) that is easy to store and can store a large amount of data is used. It is developed for music and is attracting attention by music lovers.

In addition, a CD-ROM capable of storing a large amount of data for use in a computer has been developed and marketed. The CD-ROM stores video, audio, text information, and the like.

In addition, a CD-ROM drive capable of recognizing the contents of the CD-ROM is required to read the information stored in the CD-ROM on a computer, and the assembled CD-ROM drive undergoes an inspection process. Only products that have been judged to pass can be sold.

The inspection process includes an audio inspection process, an image inspection process, a disc defect correction function inspection process, and the like. A conventional CD-ROM drive inspection apparatus includes a CD-ROM drive for inspection (1) as shown in FIG. ) And the audio signal output from the CD-ROM drive (1) to supply power through the power cable (3) to the jig (2) is seated, and the CD-ROM drive (1) seated on the jig (2) Is inputted through the audio cable 3a and the control command and data are exchanged through the CD-ROM drive 1 and the interface cable 3b, and software for driving the CD-ROM drive 1 is embedded. It consists of the microcomputer 4.

In addition, a monitor 5 for displaying an image under the control of the microcomputer 4 and a key input unit 6 for providing a command of an operator to the microcomputer 4 to start the software embedded in the microcomputer 4. And a speaker 7 for outputting an audio signal of the CD-ROM drive 1 input through the microcomputer 4.

In addition, the CD-ROM drive 1 is inserted into the oscilloscope 8 for displaying the waveform of the audio signal of the CD-ROM drive 1 and the headphone terminal of the CD-ROM drive 1 and inserted into the CD-. A headphone jack 9 for allowing an audio signal output from the ROM drive 1 to be input to the speaker 7, the microcomputer 4 and the CD-ROM drive 1, the speaker 7, and the oscilloscope 8; Is configured as a switch 10 to be connected.

The inspection apparatus of the conventional CD-ROM drive configured as described above includes a first process of seating the CD-ROM drive 1 to be examined on the jig 2, as shown in the flowchart shown in FIG. A second step of connecting the power cable 3, the audio cable 3a, and the interface cable 3b between the ROM drive 1 and the microcomputer 4; 1) a third process of inserting into the second process; a fourth process of allowing the operator to drive the software embedded in the microcomputer 4 by using the key input unit 6; and the CD-ROM drive 1 through the microcomputer 4; And a fifth step of determining whether or not the audio signal outputted in step 3) is good.

Here, the disk for checking the correction function is artificially formed with disk defects such as interrupts, black dots and fingerprints, as shown in FIG. Must have

In the third process, the operator presses the close / open key of the CD-ROM drive 1, and when the disc drawer of the CD-ROM drive 1 is opened, the disc drawer for checking the correction function is placed in the disc drawer. The process of closing the disc drawer by pressing the open key again.

In the fifth process, when the CD-ROM drive 1 is driven in the fourth process, an audio signal reproduced from the CD-ROM drive 1 is input to the microcomputer 4 through an audio cable 3a. It is output to the speaker 7 and the oscilloscope 8.

The operator determines the goodness of the audio signal output from the CD-ROM drive 1 by viewing the sound quality of the audio signal output from the speaker 7 and the waveform displayed on the oscilloscope 8.

That is, when an error signal waveform as shown in FIG. 4 is displayed on the oscilloscope 8 due to a defect of the disk formed in the correction function checking disk, or noise caused by the error signal waveform is output through the speaker 7 together with the audio signal. The operator makes a determination of rejection of the CD-ROM drive 1.

After performing the above operations, the operator presses the open / close key of the CD-ROM drive 1 to open the disc drawer and removes the disc for checking the calibration function, and presses the open / close key again to open the disc drawer. Close it.

If the CD-ROM drive 1 has been inspected as described above, the worker takes it out of the jig 2 and waits for repair.

However, the above-mentioned conventional technology is difficult to take out defective products by determining the goodness of the CD-ROM drive by performing the repetitive work manually, and the productivity is low because the inspection time is long, and the CD-ROM drive is expensive because labor is expensive. The production cost of the company was in a problem of rising.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, by performing the calibration function check of the CD-ROM drive automatically, a reliable inspection is made, the inspection time is shortened and the production cost is reduced CD The purpose of the present invention is to provide an apparatus and method for checking the auto-correction function of a ROM drive.

Automatic calibration function inspection apparatus of the CD-ROM drive of the present invention for achieving the above object is a CD-ROM drive transfer means for transferring the CD-ROM drive to be inspected to the inspection device, and the calibration function inspection to the CD-ROM drive A disc supply unit for providing a disc for a correction function and a disc for checking a correction function in the CD-ROM drive, driving the CD-ROM drive, controlling the CD-ROM drive transport means and a disc supply unit, Characterized in that it consists of a microcomputer to determine whether the error signal due to the formed disk defect is output from the CD-ROM drive to determine the pass, fail.

In addition, the automatic calibration function test method of the CD-ROM drive according to the present invention includes a first process of transferring the CD-ROM drive to be inspected to the position of the test apparatus, and connecting a microcomputer to the CD-ROM drive to check the calibration function. A second process of supplying a disk, a third process of driving the CD-ROM drive to detect whether an error signal due to a disk defect formed in a disk for checking a correction function is output from the CD-ROM drive, and the CD- And a fifth process of removing the calibration function check disk from the ROM drive and separating the CD-ROM drive and the microcomputer, and a fifth process of separating the bad CD-ROM drive and the good CD-ROM drive.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The automatic calibration function inspection apparatus for a CD-ROM drive according to the present invention includes a CD-ROM drive transfer means for transferring the CD-ROM drive 11 to be inspected to FIG. 5 and the CD-ROM drive ( 11), a disk supply unit for providing a correction function inspection disk 12.

In addition, when the CD-ROM drive 11 is provided with a calibration function check disk 12, the CD-ROM drive 11 is driven, the CD-ROM drive transfer means and the disc supply unit are controlled, and the calibration function check is performed. The microcomputer 13 detects whether an error signal due to a disk defect formed in the disk 12 is output from the CD-ROM drive 11 and determines pass / fail and the CD- under the control of the microcomputer 13. It consists of a monitor 14 which displays the automatic calibration function inspection process of the ROM drive 11.

Here, the CD-ROM drive transfer means is a pallet (21) for transferring the CD-ROM drive (11) to each process, and the pallet on which the CD-ROM drive (11) transported by the conveyor (21) is seated ( 22 and a stopper 23 controlled by the microcomputer 13 to stop the pallet 22. The stopper 23 is composed of a pneumatic cylinder.

In addition, the disk supply unit holds the button press device 24 for pressing the open / close key of the CD-ROM drive 11 and the correction function check disk 12 under the control of the microcomputer 13, and then holds the CD. And a disk loading means for seating the correction function checking disk 12 in the disk drawer of the ROM drive 11 and separating the corrected function checking disk 12 from the disk drawer.

The button pressing device 24 is composed of a pneumatic cylinder, and the disk loading means includes a pneumatic pad 25 for holding the disc 12 for checking the correction function, and the pneumatic pad 25 for the CD-ROM. It consists of the pneumatic cylinder 26 which moves back and forth of a drive.

In addition, the microcomputer 13 supplies power to the CD-ROM drive 11 through a power cable 27 as shown in FIG. 6 and the CD-ROM drive 11 through an interface cable 28. It exchanges control commands and data and receives an audio signal output from the CD-ROM drive 11 through an audio cable 29.

In addition, the microcomputer 13 is connected to the CD-ROM drive 11, the interface cable 28 and the power cable 27, and the control unit 30 to determine the pass and fail of the CD-ROM drive 11 and And a PLC 31 for driving the disc transfer means and the disc supply unit by driving various solenoids under the control of the controller 30, and formed on the disc 12 for checking the correction function from the CD-ROM drive 11. It is composed of a signal measuring unit 32 to detect the error signal output due to a disk defect and output it to the control unit 30.

As shown in FIG. 7, when the error signal waveform due to interruption, the error signal waveform due to black dot, or the error signal waveform due to fingerprint are input together with the audio signal, as illustrated in FIG. A band elimination filter 41 which breaks and passes only the frequency band of the error signal waveform, a counter 42 which counts pulses of the error signal waveform passing through the band elimination filter 41, and passes through the counter 42 And a buffer 43 which temporarily stores the number of pulses and outputs the number of pulses to the controller 30.

Hereinafter, the operation and effects of the automatic calibration function test apparatus for a CD-ROM drive according to the present invention configured as described above will be described.

First, the automatic calibration function test method of the CD-ROM drive according to the present invention operates when the operator turns on the main power and the test apparatus is activated, and the operation program of the test apparatus built in the microcomputer 13 is operated to self-diagnose each part. Is carried out.

7 is a flow chart of the inspection method according to the present invention, the first process of transferring the CD-ROM drive 11 to be inspected up to the position of the inspection apparatus, and a microcomputer (MCOM) in the CD-ROM drive 11. 13) and a second process of supplying the correction function inspection disk 12.

Further, a third process of driving the CD-ROM drive 11 to detect whether an error signal waveform due to a disk defect formed in the correction function checking disk 12 is output from the CD-ROM drive 11; A fourth process of removing the calibration function check disk 12 from the CD-ROM drive 11 and separating the CD-ROM drive 11 from the microcomputer 13; The fifth process of separating the CD-ROM drive 11 is performed.

The first process is a first step of initializing the inspection apparatus and checking for errors, a second step of detecting the pallet 22 conveyed by the conveyor 21 and the CD-ROM drive 11 to be inspected, and the PLC 31, the third step of stopping the pallet 22 by raising the stopper 23 by driving the solenoid valve.

In this case, the PLC 31 transmits the control status as described above to the microcomputer 13, and the microcomputer 13 transmits the control status of the PLC 31 to the monitor 14 to be displayed. In addition, the monitor 14 is controlled by the microcomputer 13 to display each process during the inspection.

In the second process, the PLC 31 drives the solenoid valve to connect the power cable 27, the interface cable 28, and the audio cable 29 to the CD-ROM drive 11 from the microcomputer 13. In step 1, the PLC 31 advances the button pressing device 24 and then moves backward so that the button pressing device 24 presses the open / close key of the CD-ROM drive 11 to open the disc drawer. This is done in a second step.

In the second process, the pneumatic cylinder 26 moves forward with the PLC 31 driving the disk loading means so that the pneumatic pad 25 holds the disc 12 for the calibration function test. A third step of seating the disc 12 in the disc drawer, and the PLC 31 advancing the button pressing device 24 and then moving backward to press the open / close key to close the disc drawer. There are four steps.

In addition, the third process is a first step of detecting whether the signal measuring unit 32 outputs an error signal waveform due to the interrupt formed on the correction function check disk 12 from the CD-ROM drive 11; After the error signal due to the interrupt passes through the band elimination filter 41 is input to the counter 42 and counted, the second step is stored in the buffer 43, and the contents of the buffer 43, the control unit 30 ) And a fourth step in which the control unit 3 makes a pass decision when the content stored in the buffer 43 is '0' and fails in the case of '1' or more.

In addition, the third process includes a fifth step of detecting whether an error signal waveform due to a black dot formed on the correction function checking disk 12 is output from the CD-ROM drive 11 by the signal measuring unit 32; A sixth step in which the error signal due to the black dot passes through the band elimination filter 41, is inputted to the counter 42, counted, and then stored in the buffer 43; and the contents of the buffer 43 are controlled. A seventh step of outputting to 30 and the eighth step of the control unit 30 to make a pass decision if the content stored in the buffer 43 is '0' and to make a fail decision if it is '1' or more.

In the third process, the signal measuring unit 32 detects whether an error signal waveform due to a fingerprint formed on the correction function checking disk 12 is output from the CD-ROM drive 11; The control unit 30 stores the error signal due to the fingerprint through the band elimination filter 41, is input to the counter 42, counted, and then stored in the buffer 43, and the contents of the buffer 43. ) And an eleventh step of outputting to the control unit 30 and a twelfth step of making a pass decision if the content stored in the buffer 43 is '0' and a failing decision if it is '1' or more.

In addition, in the fourth process, the PLC 31 drives the solenoid valve to move the button press device 24 forward and then backward, so that the button press device 24 presses the open / close key of the CD-ROM drive 11. The first step of opening the disk drawer by pressing, the PLC 31 advances the pneumatic cylinder 26, and then drive the pneumatic pad 25 to hold the correction function check disk 12 and the pneumatic In the second step, the pad 25 is retracted while holding the correction function checking disk 12.

In the fourth process, the PLC 31 advances the button pressing device 24 and then moves backward so that the button pressing device 24 presses the open / close key of the CD-ROM drive 11. A third step of closing the drawer, and a fourth step in which the PLC 31 drives the solenoid valve to pull the power cable 27, the interface cable 28, and the audio cable 29 from the CD-ROM drive 11. Consists of steps.

Finally, the fifth process is a first step in which the PLC 31 drives the slewoid valve to lower the stopper 23, and the CD-ROM drive 11 passed in the calibration function checking process is the next process. The CD-ROM drive, which has been transferred and failed in the calibration function inspection process, has a second step of transferring to the defective product taking-out process, and a third step of performing an error check of the inspection apparatus and preparing for inspection of the next transferred CD-ROM drive. .

As described above, the present invention automatically connects a CD-ROM drive and a microcomputer to be transferred to an inspection apparatus, and then automatically drives the CD-ROM drive, and is formed on a disk for checking a correction function driven by the CD-ROM drive. It automatically detects whether a disk defect is corrected, so that a reliable inspection can be performed, inspection time can be shortened, and the cost of an automated facility can be reduced.

Claims (7)

CD-ROM drive transfer means for transferring the CD-ROM drive to be tested to the inspection apparatus, a disc supply unit for providing a calibration function checking disk to the CD-ROM drive, and a disc for calibration function checking to the CD-ROM drive. If provided, it drives the CD-ROM drive, controls the CD-ROM drive transfer means and the disk supply unit, and detects whether an error signal due to a disk defect formed on a disk for a calibration function check is output from the CD-ROM drive, and passes. A device for checking the automatic correction function of a CD-ROM drive, characterized in that composed of a microcomputer to determine the failure. The disk supply unit of claim 1, wherein the disk supply unit presses an open / close key of the CD-ROM drive under the control of the microcomputer, and holds a disk for checking a function of the correction function. And a disk loading means for seating a calibration function inspection disk and separating the calibration function inspection disk from the disk drawer. The CD-ROM drive of claim 1, wherein the microcomputer supplies power to the CD-ROM drive through a power cable, exchanges control commands and data with the CD-ROM drive through an interface cable, and outputs from the CD-ROM drive through an audio cable. Automatic calibration function test device for a CD-ROM drive, characterized in that receiving the input audio signal. The disk of claim 1, wherein the microcomputer is connected to a CD-ROM drive, an interface cable, and a power cable, and determines a pass / fail of the CD-ROM drive, and drives the various solenoids under the control of the control unit. And a PLC for driving a conveying means and a disk supply unit, and a signal measuring unit for counting and outputting an error signal due to a disk defect formed in a disk for checking a correction function from the CD-ROM drive and outputting the counted signal to the controller. -Rom drive automatic calibration function tester. The method of claim 4, wherein the signal measuring unit cuts off the frequency band of the audio signal when the error signal waveform due to the interruption, the error signal waveform due to the black dot, or the error signal waveform due to the fingerprint is input together with the audio signal. A band elimination filter for passing only a bay, a counter for counting pulses of an error waveform passing through the band elimination filter, and a buffer for temporarily storing the number of pulses passing through the counter and outputting the buffer to the controller; Automatic calibration function tester for CD-ROM drives. A first process of transferring the CD-ROM drive to be inspected to a position of the test apparatus, a second process of connecting a microcomputer to the CD-ROM drive and supplying a calibration function test disk, and driving the CD-ROM drive A third step of detecting whether an error signal due to a disk defect formed in the correction function check disk is output from the CD-ROM drive; and removing the correction function check disk from the CD-ROM drive, and inserting the CD-ROM drive and the microcomputer. And a fifth step of separating the bad CD-ROM drive from the bad CD-ROM drive and the good CD-ROM drive. The method of claim 6, wherein the third process comprises: a first step of detecting whether an error signal due to an interrupt formed on the correction function checking disk is output from the CD-ROM drive and outputting the detected signal to the controller; A second step of detecting whether an error signal due to a black dot formed on the correction function checking disk is output from the drive and outputting the error signal to the controller; and an error signal due to a fingerprint formed on the correction function checking disk from the CD-ROM drive. And a third step of detecting the output and outputting the detected output to the control unit.