TWI298388B - Mechanism vibration analyzing system and method for optical disc player - Google Patents

Description

• 1298388 IX. Description of the Invention: [Technical Field] The present invention relates to a system and method for measuring vibration of an optical disk drive mechanism. [Prior Art] With the development of optical storage technology, the disk reading speed of the optical disk drive is getting faster and faster. When the spindle motor of the CD player is driven high, some of the balanced money will vibrate more severely under the force of the force. This vibration can cause the CD player to be unable to read stably (4). Simultaneously,

Often accompanied by vibrations, noise can make the user feel disturbed. Therefore, it is necessary to control the vibration of the optical disc when the spindle motor rotates at a high speed. A variety of solutions have been proposed by those skilled in the art. For example, add a weight on the movement where the spindle motor is located to reduce the vibration generated when the disc rotates; or provide above the spindle motor (or below) - self-leveling café _ tidying flat check g, avoid Produce vibration. =, the recording of the business should first understand the aircraft itself as a ship. How to measure the vibration of the optical disc itself is the first problem to be solved. The prior art provides a kind of rotation, that is, the acceleration of the acceleration measurement on the spindle of the optical disk drive. The measurement method is to smash the speed of the main crane to a specific frequency. The acceleration measurement senses the __ arrested, correspondingly the continuity change value of the two electronic signals, and inputs the continuous variation value of the electronic signal into the scale recorder ϋ. The spectrum is divided into mechanical parts, and the value of the electronic information is changed. The torsion of the electronic device is used to display the required vibration characteristics of the optical disk mechanism. However, the scheme and spectrum analysis __贵' this makes this kind of measurement 5 1298388 [Summary] • There is a need for this - the thief has a lower demand for the mechanism vibration measurement system. • It is necessary to provide a method for measuring the vibration of the optical mechanism of the optical disc. • “The kind of CD player is difficult _ quantity _, including the machine and the -_ device. The device is used to measure the vibration characteristics of the CD player during operation. The measuring device includes commands. The unit 70, ρ τ sends a unit, a command receiving unit, and the command setting unit is configured to set the _ / 里 Ρ 叩 7 叩 叩 叩 叩 叩 发送 发送 发送 发送 发送 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The command receiving unit is configured to receive a feedback signal from the optical disk drive, and analyze the feedback signal to obtain a measurement result. - an optical disk drive mechanism_magnification method, comprising the steps of: not setting a command, and storing the edit command in a storage unit; transmitting the measurement command in the storage unit to the optical disk; receiving from the The feedback signal of the CD player; ^ The feedback signal is analyzed to obtain the measurement result. When the optical disc drive is measured by the above-mentioned optical disc mechanism vibration measuring system and method, the acceleration measuring sensor and the spectrum analyzing instrument are not required, so the cost is low. [Embodiment] Referring to the first figure, an optical disk drive mechanism measuring system 999 includes an optical disk drive 1 and a measuring device 200. The measuring device 200 is for issuing a measurement command to the optical disk drive 100. The optical disk drive 100 receives and executes the measurement command, and returns a feedback signal to the measuring device 2 after the measurement is completed. The measurement command mainly includes information such as the motor speed variation, the motor speed 6 -1298388, and the number of measurements; the feedback signal mainly includes information such as the number of rails, the actual motor speed, and the current number of measurements. In this embodiment, the measurement command and the feedback signal are both in a 12-bit SCSI format, and the format is as follows:

Byte[0] Byte[l] Byte[2] Byte[3] Byte[4] Byte[5] Byte[6] Byte[7] Byte[8] Byte[9] Byte[10] Byte[ll] 〇χ 〇ο 〇χ〇ο 〇x〇0 〇x〇0 〇χ〇ο 〇x〇0 〇x〇0 〇x〇0 〇x〇0 〇x〇0 〇x〇0 〇x〇0 where Byte[ l], Byte[9], Byte[10], and Byte[ll] are undefined, and their values are always set to zero. Byte[0] is used to indicate user-defined commands; B0e[2] and Byte[3] are used to indicate motor speed variation; Byte[4] and Byte[5] are used to indicate the number of straddles; Byte[6] and Byte[7] is used to indicate the motor speed; Byte[8] is used to indicate the number of measurements. The motor speeds Byte[6], Byte[7], and the number of measurements Byte[8] are variable numbers. The optical disk drive 100 includes a communication interface 1 2, a data processor, a switch 4, a servo controller 106, a drive circuit 108, a spindle motor 11 (), an optical pickup 112, and a signal amplifying circuit 114. . Among them, the communication interface 1〇2 adopts SCSI (Small c〇mputer)

System Interface (small computer system interface), other technologies such as IDE (Integrated Drive Electronics) can also be used. The communication interface 1〇2 receives the measurement command from the measuring device 2〇〇 and transmits the measurement command to the grazing processor 1〇4. The lean processor analyzes the measurement command to obtain the motor speeds By_, Byte[7] ' and transmits the motor speeds _[6], _[7] to the ship controller 106. The feeding service controller 1〇6 receives the motor speed Byte and the B river knife, and transmits the command to control the main shaft motor ship, the servo servo and the focus servo to the drive circuit ship. The drive circuit 7 1298388 108 controls the rotation of the spindle motor 110 and controls the radial cross-track operation of the optical pickup H2. The spindle motor 110 transmits its actual motor speeds Byte[6], Byte[7] back to the data processor 104 in time. The optical pickup 112 performs a radial straddle operation and reads the information of the optical disc to generate a basic signal. The signal amplifying circuit 114 amplifies the base signal to generate an amplified signal, and transmits the amplified signal to the servo controller 1〇6. The servo controller 106 forwards the amplified signal to the data processor 104. The data processor 104 extracts the number of cross-tracks Byte[4], Byte[5] ' from the amplified signal, and the number of the straddles Byte[4], Byte[5], the actual motor speed Byte[6], Byte [7] and the current measurement times Byte is set to a SCSI format feedback signal, and the feedback signal is transmitted to the communication interface 102. After a single measurement is completed, the communication interface 102 sends a single measurement completion signal to the measurement device 200, and after the measurement device 2 confirms, the feedback signal is transmitted back to the measurement device 2A. Referring to the second figure, the measuring device 2 includes a command setting unit 202, a storage unit 204, a command transmitting unit 206, a communication interface 208, a command receiving unit 210, and a display unit 212. Among them, the communication interface 2〇8 adopts scSI (Small Computer System Interface), and other technologies such as IDE (Integrated Drive Electronics) can also be used. The command setting unit 202 is for setting the measurement command and storing the measurement command in the storage unit 204. The command setting unit 2〇2 sets the content of the measurement command including Byte[0], Byte[2], Byte[3], Byte[6], Byte[7], and Byte[8]. The storage unit 204 is configured to store the measurement command. The command transmitting unit 2〇6 is used to retrieve 8 1298388 and update the measurement command in the storage unit 204, and send the measurement command to the communication interface 208. The content of the measurement command is updated, including the postal code, the B tool setting, and

Byte[8]. For example, the values of the parameters set in the initial measurement command are: motor speed variation is a, motor speed is b, and measurement times are n. Moreover, the mth measurement has been completed so far. At this time, the command transmitting unit 2〇6 updates the motor rotation speed to (b+mxa); the number of measurement times is updated to (n-m). Wherein, when 11 and 111 are equal, the command transmitting unit 2〇6 stops working. The first surface 208 is used to connect the optical disk drive 1 to the measuring device 2, and sends the measurement command to the optical disk drive 100 to receive a single measurement completion signal and feedback signal from the optical disk drive 100, and The feedback signal is sent to the command receiving unit. The command receiving unit 210 is configured to receive the feedback signal from the communication interface 2〇8, analyze the feedback signal, and obtain the number of crossovers, By, Byt, the actual motor speed Byte[6], Byte[7], and the current Information such as Byte[8] is measured and transmitted to the display unit 212. The display unit 212 is configured to receive the information from the command receiving unit 21 and display an optical mechanism vibration curve, and then send the current measurement number Byte[8] to the command sending unit 206. Referring to the third figure, the The abscissa of the vibration mechanism of the optical disc mechanism is the number of measurements Byte[8], and the ordinate is the number of cross-tracks Byte[4], Byte[5]. Among them, since the actual motor Byte[6] and Byte[7] of each corresponding measurement are off, the engine vibration curve is not the number of scales corresponding to the actual motor speed Byte[6] and Byte[7]. B Ke 4], Byte [5]. The disc mechanism vibration _ the highest point indicates the maximum number of 1 1298388 large spans that appear in the measuring process towel, and the maximum number of cross-overs can reflect the most severe vibration of the disc machine in the measurement corresponding to the maximum number of cross-tracks. According to the maximum vibration point and the vibration mechanism of the optical disk mechanism, the corresponding vibration absorbing measure can be performed on the optical disk drive. Referring to the fourth figure, a method for measuring the vibration of the optical disk drive mechanism uses the above-described measuring device 200 to measure the mechanism vibration of the optical disk drive. First, the command setting unit 2〇2 sets the measurement command in the scsi format, that is, sets the user-defined command Byte[〇], motor speed change ΐ Byte[2], Byte[3] 'motor speed Byte[6], Byte[ 7] and the number of measurements, and the measurement command is stored in the storage unit 204 (step 902); then, the command sending unit 206 retrieves the measurement command in the storage unit 204 and sends the measurement command to the communication interface 2〇8. The measurement command (the step communication interface sends the measurement command to the optical complement, and the single (four) quantity completion signal from the optical rhyme brain (step 906); the communication interface 208 receives the single measurement completion signal from the optical disk drive 1 Sending a response to the optical disk drive 100 to notify the optical disk drive 1 to send a feedback signal (step simplification); the communication interface 2 〇 8 receives the feedback signal from the optical disk drive, and sends the feedback signal to the command receiving unit 21 ( Step 91:); the receiving unit 210 analyzes the feedback signal to obtain the number of cross-tracks

Byte[4], Byte[5], motor actual speed % just, Byte[TJ and current measurement times

Byte[8] (step 912); the command receiving unit 21 〇 will cross the number of punches [4], the kiss motor actual speed Byte [6], Byte [7] and the read/sew _ limit display unit 212 (step 914) The display unit is to receive the information from the command receiving unit training, and displays an optical mechanism vibration curve of 1298388 (step 916); the display unit 212 will measure the current number of times.

Byte[8] sends the feed to the sender 2G6_ 918); the command sends the material and receives the current measurement number Byte[8] 'Jingcai·stitch is the pattern, if not completed, update the storage unit _ quantity command, and then continue to execute The above steps are painful (step 9; if completed, the measurement ends (step 922). In summary, when the above-mentioned optical disk mechanism vibration measuring system is used to measure the vibration of the optical disk drive, acceleration, sensing, and spectrum analysis are not required. Therefore, it has a simpler description of the drawings. The first figure is a structural diagram of the vibration measurement system of the optical disk drive mechanism. The first figure is the system structure diagram of the optical disk drive in the first figure. The second figure is the second picture. The displayed vibration mechanism diagram of the optical disk drive mechanism. The fourth figure is the operational flow chart of the method for measuring the vibration of the vehicle mechanism. The communication interface 102, 208, the service controller 106, the spindle motor 110, the signal amplification circuit 114, the command setting unit 202, the command transmission Unit 206 Display unit 212 999 [Description of main component symbols] [Invention] Optical disk drive 100. Data processor 104 Drive circuit 108 Optical pickup 112 Measurement device 200 Command unit 204 receives the optical disc drive mechanism unit 210 shake measurement system

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Claims (1)

.1298388 X. The scope of application for patents··, 丨.—The optical vibration measurement system of the optical disc mechanism, including the -CD player and the measuring device. The 4 device is screaming when reading with the _4 machine. Install i including object and element, command Wei unit, command touch, scale setting. Single 70 is used for ° and test command 'The command sending unit is used to send the measurement command to the CD player; the command receiving unit uses Receiving a feedback signal of the optical disk drive, and analyzing the feedback signal to obtain a measurement result. Lu Zhongyue specializes in the optical disc mechanism vibration measurement system described in item 1, wherein the 13⁄4 measuring device also includes a shaft transfer unit, and the age-level device _ bears to the display unit. The result is displayed in the form of a vibration mechanism of the optical disk drive mechanism. 3. The optical disc mechanism vibration measuring system according to claim 2, wherein the abscissa of the vibration curve is the current _ quantity key, the ordinate is the number of impurities, and the highest point of the vibration curve indicates the maximum span. Number of executions. 4. The optical disc mechanism vibration measuring system according to item 1, wherein the measuring command is a SCSI format command, and the command includes a riding speed quantity 'motor speed and number of measurements. 5. If you apply for a patent! The semaphore mechanism of the stalking mechanism is the SCSI format signal, which includes the number of cross-rails, the actual number of revolutions of the motor, and other measurement times. 6. The optical disk drive mechanism vibration measuring system according to claim i, wherein the measuring device further comprises a storage element, and the measurement command of the scale element setting unit 12 • 1298388 and the command The measurement command after the unit is updated. 7. The system of claim 1, wherein the metering device further comprises a communication interface for connecting the thin n, the system and the optical disk drive, and the communication interface is secretly receiving the system. Commanding, and sending a command to the vehicle; the communication interface is further configured to receive a feedback signal from the optical disk drive, and transmit the feedback signal to the command receiving unit. 8. The optical disc mechanism vibration measuring method, comprising the steps of: setting a measurement command, and storing the measurement command in a storage unit; transmitting the measurement command in the storage unit to the optical disk drive; receiving the optical disk drive from the optical disk drive The feedback signal; the feedback signal is analyzed to obtain the measurement result. 9. The optical disc mechanism vibration measuring method according to claim 8, wherein the disc mechanism vibration method further comprises the following steps: the display unit receives the measurement result and displays an optical mechanism vibration curve. 10. The optical disc mechanism vibration measuring method according to claim 8, wherein the measuring command is a SCSI format command, the command includes a motor speed variation, a motor speed, and a measurement number, and the feedback signal is a SCSI format. Signal, the signal includes the number of straddles, the actual number of motor revolutions and the current number of measurements. 11. The optical disc mechanism vibration measuring method according to claim 10, wherein the optical disc mechanism vibration method further comprises the following steps: after the single measurement is completed, updating the motor speed of the measurement command in the storage unit And the number of measurements. 13