CN201281941Y - Servo drive and parameter measurement integrated device for optical disc play deck - Google Patents
Servo drive and parameter measurement integrated device for optical disc play deck Download PDFInfo
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- CN201281941Y CN201281941Y CNU2008202187652U CN200820218765U CN201281941Y CN 201281941 Y CN201281941 Y CN 201281941Y CN U2008202187652 U CNU2008202187652 U CN U2008202187652U CN 200820218765 U CN200820218765 U CN 200820218765U CN 201281941 Y CN201281941 Y CN 201281941Y
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Abstract
The utility model discloses a compact disc playing chip servo driving and parameter measurement integral device for providing servo driving for the chip inspection, measuring various parameters at real time, reducing the equipment investment, perfecting the measurement items and improving the production efficiency. The device comprises a computer and an embedded system controlling unit connected with the computer and connected with a compact disc controlled CPU; the device further comprises an analog channel parameter setting circuit A, an analog-digital conversion circuit A, a servo error signal generation circuit, an automatic gain control circuit, a filtering circuit and an output amplifying circuit which are connected in sequence, and the respective registers are connected with the compact disc controlled CPU; and the device also comprises an analog channel parameter setting circuit B, an analog-digital conversion circuit B, a digital equalization processing circuit, a binarization circuit and a decoding and correcting processing circuit which are connected in sequence, and the respective registers are connected with the compact disc controlled CPU.
Description
Technical field:
The utility model relates to a kind of disc player clock mechanism and checks regulating device, especially a kind of core inspecting and adjusting that can be provides servo driving and measures various parameters, the dvd playback movement servo driving and the parameter measurement integrated apparatus that reduce equipment investment, improve the measurement project, enhance productivity in real time.
Background technology:
At present, the servo driving of disc player clock mechanism and parameter measurement are except adopting the dedicated servo driving arrangement, dispose peripherals such as JITTER table, oscillograph, altimeter, PDx/PDy metering circuit toward contact, not only increased equipment cost, and the use of a plurality of equipment has also influenced production efficiency.In addition, existing core inspecting and adjusting equipment also exists problems such as the measurement project is incomplete, poor selectivity, can not satisfy demand of practical production.As in actual production, except needs are measured the parameter of using always for disc player clock mechanism, also will be according to the own characteristic of movement, measure other parameters selectively, for example with the bare headed movement of assembling of BULK, except measurement has the TT height, JITTER, RF of general character, also to check KINK value, PD balance value, FEO, the cross-section amount of ditch or the like OPU parameter according to the reliability situation.But, therefore just can not in time understand the quality condition of product comprehensively, thereby reduce reliability of products because existing inspection accent equipment can't optionally be measured the movement parameter according to the actual features of different cassette mechanism.
Summary of the invention:
The utility model is in order to solve the above-mentioned technical matters of existing in prior technology, provide a kind of core inspecting and adjusting that can be servo driving to be provided and to measure various parameters, the dvd playback movement servo driving and the parameter measurement integrated apparatus that reduce equipment investment, improve the measurement project, enhance productivity in real time.
Technical solution of the present utility model is: a kind of dvd playback movement servo driving and parameter measurement integrated apparatus, it is characterized in that: be provided with computing machine, be connected to the embedded system control module with computing machine, embedded system control module and CD control CPU join; Be provided with analog channel parameter setting circuit A, the analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit, filtering circuit and the output amplifier that join successively, the register of described analog channel parameter setting circuit A, analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit and filtering circuit and CD control CPU join; Also be provided with analog channel parameter setting circuit B, the analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and the decoding correction processing circuit that join successively, the register of described initialization circuit B, analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and decoding correction processing circuit and CD control CPU join.
The utility model user can be according to needs of production, man-machine interface by computing machine is selected the measurement project, for the inspection adjustment of dvd playback movement provides servo drive signal and can measure various parameters in real time, have the equipment investment of minimizing, improve the measurement project, advantage such as enhance productivity.
Description of drawings:
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: be provided with computing machine, be connected to the embedded system control module with computing machine, embedded system control module and CD control CPU join; Be provided with analog channel parameter setting circuit A, the analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit, filtering circuit and the output amplifier that join successively, the register of described analog channel parameter setting circuit A, analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit and filtering circuit and CD control CPU join; Also be provided with analog channel parameter setting circuit B, the analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and the decoding correction processing circuit that join successively, the register of described initialization circuit B, analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and decoding correction processing circuit and CD control CPU2 join.CD control CPU2, analog channel parameter setting circuit A, analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit, filtering circuit and output amplifier, analog channel parameter setting circuit B, analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and decoding correction processing circuit constitute the CD control module.
The inspection timing, output amplifier and shaven head/movement in the CD control module are joined, servosignal and analog channel parameter setting circuit A with shaven head/movement output joins simultaneously, and RF signal and analog channel parameter setting circuit B that shaven head/movement is exported join.
The course of work:
(1) computing machine is given an order to the embedded system control module, for example: system action command, the order of measurement project choice, the assigned address order of reading CD, measurement movement parameter command etc.
(2) after embedded system is received mentioned order, mentioned order is decomposed into concrete servo action subcommand, and subcommand and controlled variable are passed to the CD control module, the CD control module produces concrete servo action according to subcommand and parameter value.
(3) the movement adjusting mechanism is adjusted movement.
(4) embedded system read data from the register of CD control module goes out the various parameters of movement according to the algorithm computation of program design, as the foundation of movement adjustment and show on graphoscope.
Can be achieved as follows servo action:
1. the control of the various patterns of spindle motor comprises: constant angular velocity (CAV) pattern, constant linear velocity (CLV) pattern servo pattern.
2. focus control.
3. tracking control.
4. various SEEK actions.
5. tracking coil-end voltage DC component minimizes, and eliminates because of tracking coil-end voltage DC component causes object lens R.
Principle of work:
(1) focusing/tracking/SEEK error signal of servo error signal generative circuit generation is as the input signal of movement servo-control system.
Focusing/tracking/seek/ spindle motor control figure PID is servo-controlled core, and the ATC characteristic is gained and phase compensation.
Analog channel parameter setting circuit is used to adjust the gain/Offset of PD output signal, makes the dynamic range of PD output signal meet the A/D requirement.PD is the position detection unit of focusing/tracking, detects the position of focusing/tracking.
Automatic gain control circuit can be eliminated the influence of laser power and the fluctuation of CD reflection rate, guarantees error signal normalization.
More than constitute the negative feedback closed loop control system, guarantee that system works is at focusing/tracking state.
(2) the RF signal conditioning circuit is used for the address information of data of optical disk and CD is carried out decoding processing.
The digital equalising treatment circuit is adjusted the resolution of CD 3T signal.
Binarization circuit is a pulse width signal with the adjusted RF conversion of signals of digital equalising treatment circuit.
The decoding correction processing circuit decodes out with the address information of data and CD in the RF signal, is used for the addressing of CD control.
It is as follows to measure the movement parameter:
(1)FEpp、FEO、FEC、TEpp、TEC
Value from the related register of servo error signal generative circuit and automatic gain control circuit calculates.
(2) Kf of focusing error DAD method, the Kt value of DPP tracking error DPP mode.
Value from the related register of servo error signal generative circuit and automatic gain control circuit calculates.
(3) the cross-section amount of ditch
Value from the related register of servo error signal generative circuit and automatic gain control circuit calculates.
(4)PDx/PDy
Value from the related register of analog to digital conversion circuit A calculates.
(5) KINK value
Value from the register of wave filter calculates.
(6)RF
Value from the related register of analog to digital conversion circuit B calculates.
(7)JIT
Value from the related register of binarization circuit calculates.
(8) focusing/tracking driving voltage DC component.
Value from the register of wave filter calculates.
The minimized processing of tracking driving voltage DC component also needs the CD physical address information that obtains the correction processing circuit from decoding, and the control object lens move to the position of tracking driving voltage DC component minimum.
Claims (1)
1. dvd playback movement servo driving and parameter measurement integrated apparatus, it is characterized in that: be provided with computing machine, be connected to the embedded system control module with computing machine, embedded system control module and CD control CPU join; Be provided with analog channel parameter setting circuit A, the analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit, filtering circuit and the output amplifier that join successively, the register of described analog channel parameter setting circuit A, analog to digital conversion circuit A, servo error signal generative circuit, automatic gain control circuit and filtering circuit and CD control CPU join; Also be provided with analog channel parameter setting circuit B, the analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and the decoding correction processing circuit that join successively, the register of described initialization circuit B, analog to digital conversion circuit B, digital equalising treatment circuit, binarization circuit and decoding correction processing circuit and CD control CPU join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202187652U CN201281941Y (en) | 2008-10-30 | 2008-10-30 | Servo drive and parameter measurement integrated device for optical disc play deck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202187652U CN201281941Y (en) | 2008-10-30 | 2008-10-30 | Servo drive and parameter measurement integrated device for optical disc play deck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281941Y true CN201281941Y (en) | 2009-07-29 |
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ID=40928809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202187652U Expired - Fee Related CN201281941Y (en) | 2008-10-30 | 2008-10-30 | Servo drive and parameter measurement integrated device for optical disc play deck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281941Y (en) |
-
2008
- 2008-10-30 CN CNU2008202187652U patent/CN201281941Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |