Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for examining tunbalanced disk

A detection method and technology of balancing disk, which are applied in the directions of optical recording/reproduction, digital signal error detection/correction, digital recording/reproduction, etc., and can solve problems such as troubles in reading operations

Inactive Publication Date: 2009-01-14
LITE ON IT
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the judging mechanism made in this way is to put the test disc 3g to the left side (LSB) to perform a preset benchmark for TE cross-track number detection, and judge other results below this benchmark It is a normal disk, so such a design may cause some unbalanced disks to be regarded as normal disks and read data at a high speed, causing troubles in subsequent reading operations

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for examining tunbalanced disk
  • Method for examining tunbalanced disk
  • Method for examining tunbalanced disk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] see image 3 , is that in a preferred embodiment of the present invention, the optical reading device operates at a first preset speed (about 3000 revolutions per minute in this embodiment) and under the detection state of the open loop control, that is, the optical reading head is stationary When using different test discs 3g, 5g and 6g, they are placed in three different ways: horizontally placed, placed towards the left side (LSB) and placed towards the right side (RSB), to carry out a first detection process, That is, the number of cross-tracks of the tracking error signal (TE for short) of the optical disc for testing is detected. As can be seen from the figure, the vertical axis represents the cross-track number of TE. The larger the number, the greater the cross-track number of TE and the greater the degree of vibration of the test disc. The horizontal axis represents the 3g of the test disc. , 5g and 6g classifications, and the number of TE cross-tracks obtaine...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method out for detecting unbalanced disc includes using the first preset rotation speed to carry out the first detection including to judge whether disc to be fetched is unbalance disc or not, carrying out the second detection as what it is done in the first one if whether disc to be fetched is unbalanced disc or not is not judged out, ending detection and using the fist mode to fetch disc if disc to be fetched is judged out that it is normal one, or otherwise ending detection and using the second mode to fetch disc .

Description

technical field [0001] The invention relates to an unbalanced disk detection method, especially applied to the processing process of an optical reading device for an optical disk to be read. Background technique [0002] In general commercially available optical discs, except that the data recording side must be recorded on the data surface by means of electroplating, the other side is usually painted or marked with the design of the title or company name of the optical disc, However, different optical disc manufacturers have different coating and manufacturing methods, and different production methods have different degrees of influence on the weight distribution of the optical disc itself, which may cause distribution on the same optical disc. Uneven results, and even the design of some discs is asymmetrical non-circular discs, so when the optical reading device reads the discs, it will cause different degrees of distortion in the radial direction. Shaking, if it shakes t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B20/18
Inventor 谢仁贵潘怡全
Owner LITE ON IT