CN100452177C - Method for examining tunbalanced disk - Google Patents
Method for examining tunbalanced disk Download PDFInfo
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- CN100452177C CN100452177C CNB2004100589811A CN200410058981A CN100452177C CN 100452177 C CN100452177 C CN 100452177C CN B2004100589811 A CNB2004100589811 A CN B2004100589811A CN 200410058981 A CN200410058981 A CN 200410058981A CN 100452177 C CN100452177 C CN 100452177C
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- non equilibrium
- equilibrium disk
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Abstract
The present invention relates to a method for detecting an unbalanced disk sheet, which is applied to a processing process of an optical reading device to an optical disk sheet to be read. The method for detecting an unbalanced disk sheet comprises the following steps that the optical disk sheet to be read carries out a first detection process at first presetting rotation speed, the first detection process comprises the step that whether the optical disk sheet to be read is an unbalanced disk sheet is judged; when whether the optical disk sheet to be read is the unbalanced disk sheet can not be judged in the first detection process, the optical disk sheet to be read carries out a second detection process at second presetting rotation speed, and the second detection process comprises the step that whether the optical disk sheet to be read is the unbalanced disk sheet is judged; when the optical disk sheet to be read is judged as a normal sheet in the first detection process and the second detection process, the detection is ended, and the optical disk sheet to be read is read in a first reading mode. When the optical disk sheet to be read is judged as the unbalanced disk sheet, the detection is ended, and the optical disk sheet to be read is read in a second reading mode.
Description
Technical field
The present invention is a kind of non equilibrium disk detection method, refers to be applied to the processing procedure of an optical pickup device to a discs to be read especially.
Background technology
General commercially available discs, except wherein the one side of record data must be recorded in this data surface in modes such as plating data, one side is generally in addition application or the title of this discs of seal or the design of Business Name in addition, yet different applications is just arranged and make mode for different discs film-making labels, the different modes of production just produces the influence of weight distribution in various degree to discs itself, and may be just therefore produce the result of skewness on the one side discs, even the shape-designing of some discs itself is exactly not to be symmetrical non-circular discs, therefore optical pickup device will cause the rocking in the radial direction of degree varies when this discs is read, if the words of rocking to a certain degree just can influence the correctness that optical pickup device is judged data on this discs, make data can't be made the discs of correct interpretation by optical pickup device for this kind cause, we are called non equilibrium disk (unbalance disk).
See also Fig. 1 (a) (b), be a non equilibrium disk (unbalance disk) 10 the existing operation situations that produced under existing discs manufacturing technology in an optical pickup device inside, on this non equilibrium disk 10, there is the unequal part S of an application by Fig. 1 (a) as can be known shown in (b), in Fig. 1 (a), be shown as a turning axle 20 in this optical pickup device and an optical read head 21 still in stationary state, show then that in Fig. 1 (b) this turning axle 20 has begun to rotate but this optical read head 21 still keeps static, this is because this optical pickup device is carrying out out the detected state of circuit controls, because the uneven relation of weight distribution on this non equilibrium disk 10, cause the unequal part S of this application on a radial direction r, the effect of a centripetal force to be arranged and make these non equilibrium disk 10 whole generations rock, in addition by Fig. 1 (a) (b) as can be known under this optical read head 21 keeps static situation, the track 11 on this non equilibrium disk 10 also has the phenomenon that departs from its track that is read after this turning axle 20 rotates beginning.
So existing detection technique is the detected state that carries out out circuit controls with optical pickup device, making optical read head (is optical read head rocking of not following that non equilibrium disk produces and rocking under stationary condition, discs is detected its tracking error signal (tracking error with a high rotating speed, be called for short TE) stride the rail number greater than a threshold value time, be judged as non equilibrium disk (unbalance disk).And at present the test mode of optical pickup device is to set one group of test discs that causes the weight in the radial direction of discs to differ because of application, is respectively 3g, 5g and 6g, and bigger promptly representative of this numeral will cause the shaking degree when reading can heal greatly.
See also Fig. 2, be with existing detection technique under high rotating speed and optical read head when being static, with different tests discs 3g, 5g and 6g stride the rail number with what different storing modes detected its TE, by shown in the figure as can be known, longitudinal axis table TE strides the rail number, numeral more greatly represent TE stride the rail number also the more and the relative test degree of rocking with discs also more greatly, the part of transverse axis is then represented test discs 3g, the classification of 5g and 6g, there are three kinds by testing as can be known shown in the figure with the storing mode of discs in existing detection technique, be respectively and keep flat, put (LSB) towards the left side and put (RSB) towards the right side, and each test consequently shows with a straight line section with the rail number of striding of the resultant TE of storing mode of discs among the figure.In this figure, there is a horizontal line R, be to have indicated under this optical pickup device detects with high rotating speed, the rail number of striding that obtains TE is about 225 numerical value, therefore in the foregoing existing detection technique, obtain TE stride the rail number greater than a threshold value time, be judged as non equilibrium disk, we just define this threshold value and are about the numerical value 225 that this horizontal line R is indicated, it is the greatest limit that is judged as normal sheet, in other words more than this horizontal line R, all be judged as non equilibrium disk, and below this horizontal line R, all be judged as normal sheet.Yet the sheet mechanism of being done in this way of declaring is that test is detected a preset reference of being fixed with the rail number of striding that discs 3g makes TE in (LSB) mode of putting towards the left side, and this other result below benchmark all is judged as normal sheet, so, so design may cause the part non equilibrium disk by as being normal sheet and carry out data read in high-revolving mode, causes follow-up puzzlement of reading action.
Summary of the invention
The fundamental purpose of the present invention's invention is in order to reduce non equilibrium disk (unbalance disk) wrong probability to take place to detect; can correctly operate with the protection mechanism of guaranteeing optical pickup device; and improve optical pickup device declare the sheet success ratio, make the discs of 3g can be read and can read in the use in high-revolving mode.
The present invention is a kind of non equilibrium disk detection method, be applied to the processing procedure of an optical pickup device to a discs to be read, this non equilibrium disk detection method comprises the following step: this discs to be read is carried out one first testing process with one first preset rotation speed, and whether this first testing process comprises this discs to be read of judgement is a non equilibrium disk; When failing in this first testing process to judge whether this discs to be read is a non equilibrium disk, this discs to be read is carried out one second testing process with one second preset rotation speed, and whether this second testing process comprises this discs to be read of judgement is a non equilibrium disk; And in this first testing process and this second testing process, when this discs to be read is judged as a normal sheet, detection of end also reads with one first read mode, when this discs to be read was judged as a non equilibrium disk, detection of end also read with one second read mode.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein this first preset rotation speed is greater than this second preset rotation speed.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein the high reading speed of this second read mode is the high reading speed less than this first read mode.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein this first testing process comprises the following step: the detected state of circuit controls is opened in execution one; And detect with this first preset rotation speed this discs to be read a tracking error signal stride the rail number, and and one first threshold value and one second threshold value make comparisons, in order to judge whether this discs to be read is a non equilibrium disk.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein this second threshold value is less than this first threshold value.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein the rail number of striding of this tracking error signal is meant when the track on this discs to be read do detected, a number of tracks that departs from this track and crossed over, when this number of tracks judges that just this discs to be read is a non equilibrium disk during greater than this first threshold value, when this number of tracks judges that just this discs to be read is a normal sheet during less than this second threshold value.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein this second testing process comprises the following step: the detected state of circuit controls is opened in execution one; And detect with this second preset rotation speed this discs to be read a tracking error signal stride the rail number, and and one the 3rd threshold value make comparisons, in order to judge whether this discs to be read is a non equilibrium disk.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein the 3rd threshold value is less than this second threshold value.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein the rail number of striding of this tracking error signal is meant when the track on this discs to be read do detected, a number of tracks that departs from this track and crossed over, when this number of tracks judges that just this discs to be read is a non equilibrium disk during greater than the 3rd threshold value, when this number of tracks judges that just this discs to be read is a normal sheet during less than the 3rd threshold value.
According to above-mentioned conception, non equilibrium disk detection method of the present invention, wherein this second testing process comprises the following step: the detected state of circuit controls is opened in execution one; And detect with this second preset rotation speed this discs to be read a tracking error signal stride the rail number, and and a threshold value make comparisons, when this tracking error signal stride the rail number greater than this threshold value the time judge that just this discs to be read is a non equilibrium disk, when this tracking error signal stride the rail number less than this threshold value the time judge that just this discs to be read is a normal sheet.
Description of drawings
The present invention must pass through by following graphic and detailed description, so that get a more deep understanding:
Fig. 1 (a) is to be the existing operation situation synoptic diagram of a non equilibrium disk at an optical pickup device (b);
Fig. 2 is to stride rail number with discs with what different storing modes detected its TE with different tests with existing detection technique under high rotating speed;
Fig. 3 is in the preferred embodiment of the present invention, strides rail number with discs with what different storing modes detected its TE with different tests under high rotating speed;
Fig. 4 is in the preferred embodiment of the present invention, strides rail number with discs with what different storing modes detected its TE with different tests under the slow-speed of revolution;
Fig. 5 is in the preferred embodiment of the present invention, the process flow diagram of its non equilibrium disk detection method.
Each assembly that is comprised during the present invention is graphic lists as follows:
Non equilibrium disk 10 tracks 11
Turning axle 20 optical read heads 21
The unequal part S of application radial direction r
The horizontal line R first baseline L1
The second baseline L2 the 3rd baseline L3
Embodiment
See also Fig. 3, be in the preferred embodiment of the present invention, optical pickup device is with one first preset rotation speed (be about among this embodiment per minute 3000 change) and to adopt out under the detected state of circuit controls be that optical read head is when being static, be respectively in three kinds of different storing modes with 6g with discs 3g, 5g with different tests and keep flat, put (LSB) towards the left side and to put (RSB) towards the right side, carry out one first testing process, promptly detect this test and stride the rail number with the tracking error signal (tracking error is called for short TE) of discs.By shown in the figure as can be known longitudinal axis table TE stride the rail number, numeral more greatly represent TE stride the rail number also the more and the relative test degree of rocking with discs also more greatly, transverse axis is then represented the classification of test with discs 3g, 5g and 6g, and each rail number of testing with the resultant TE of discs of striding consequently shows with a straight line section.
By as can be known shown in Figure 3, it is synoptic diagram for the testing result of one first testing process, there are one first baseline L1 and one second baseline L2 in the drawings, correspond respectively to the striding the rail number of TE on the longitudinal axis and respectively obtain one first threshold value and one second threshold value, indicated and under optical pickup device detects with this first preset rotation speed, set this first threshold value and be about 225 numerical value, and this second threshold value is about 175 numerical value, therefore, at first we are except utilizing in the previous described existing detection technique, with the part of testing result (be TE stride rail number) greater than this first threshold value, be judged as non equilibrium disk, and then in preferred embodiment of the present invention, we are judged as normal sheet with the part of testing result less than this second threshold value.Therefore by shown in the figure as can be known, test is with the putting towards the left side of the 5g in the discs (LSB), the putting of 5g (RSB) towards the right side, therefore 6g put towards the right side (RSB) of putting (LSB) and 6g towards the left side just be judged as non equilibrium disk, and the test that keeps flat 6g with discs in testing process its result if part is to fall within this first baseline L1 when above, we also judge it is non equilibrium disk, on the other hand, the test that keeps flat 3g among the figure with discs because be below this second baseline L2, so be judged as normal sheet, and the testing result of putting (RSB) towards the right side of 3g is if part is to fall within this second baseline L2 when following, and also judgement is normal sheet.Yet in this first testing process if when testing result be between this first threshold value and this second threshold value the time, be resultant TE stride the rail number smaller or equal to 225 and more than or equal to 175 o'clock, we are just being that optical read head is when being static under one second preset rotation speed that is lower than this first preset rotation speed and the detected state of adopting out circuit controls, carry out one second testing process, so by as can be known shown in Figure 3, what need remake having of judgement: 3g puts putting (RSB) towards the right side, keep flat 5g and keeping flat 6g of (LSB), 3g towards the left side.
See also Fig. 4, be in the preferred embodiment of the present invention, optical pickup device is with this second preset rotation speed (be about among this embodiment per minute 2000 change) and adopt out under the detected state of circuit controls, be that optical read head is when being static, with different test discs, in different storing modes, carry out one second testing process and detect this test and stride the rail number with the TE of discs.Since general existing optical pickup device when high rotating speed, be sidelong can than keep flat the TE that records to stride the rail number big, and when the slow-speed of revolution, be sidelong can than keep flat the TE that records to stride the rail number little, therefore, we whether just can be used as by this phenomenon be the further judgment mode of non equilibrium disk.
By as can be known shown in Figure 4, it is synoptic diagram for the testing result of this second testing process, there is one the 3rd baseline L3 in the drawings, obtain one the 3rd threshold value corresponding to the striding the rail number of the TE on the longitudinal axis, indicated at optical pickup device and be about 72 numerical value with following setting the 3rd threshold value that the slow-speed of revolution detects, therefore we are with the size of the 3rd threshold value, as the benchmark that judges whether to normal sheet, in other words all be judged as non equilibrium disk the above person of the 3rd baseline L3, and the rail number of striding of TE all is judged as normal sheet smaller or equal to the 3rd threshold value person.The purpose of this judgment mode is to be, if general its degree of rocking of non equilibrium disk is if only reach as the words of the test in the preferred embodiment of the present invention with the degree of discs 3g, on the mechanism of benchmark that we set and judgement, will make it to be judged the action that becomes normal sheet and do further to read, thereby define the position of the 3rd baseline L3.By shown in the figure as can be known, the part that is circled is in this first testing process, the rail number of striding of TE is the testing result of failing to judge whether between this first threshold value and this second threshold value into non equilibrium disk or normal sheet, therefore in this second testing process, just can be determined, by shown in the figure as can be known, keep flat the test discs of putting (LSB) towards the left side of 6g and the most 5g of keeping flat and part 6g, just be judged as non equilibrium disk, when the 3rd baseline L3 is following, then be judged as normal sheet if keep flat the testing result of 5g, but 6g put towards the left side (LSB) just has been confirmed to be non equilibrium disk in this first testing process, so in this second testing process, just can not be judged as normal sheet again, therefore 3g put towards the right side (RSB) of putting (LSB) and 3g towards the left side then be judged as normal sheet, hereat via the judgment mode and the testing result of this second testing process, met we for shaking degree if be considered as the requirement of normal sheet when only reaching test with the degree of discs 3g.
See also Fig. 5, be in the preferred embodiment of the present invention, the process flow diagram of its non equilibrium disk detection method, when this first testing process and this second testing process all detect finish after, the part that finishes to open the detected state of circuit controls and will be judged as normal sheet is carried out data read with one first read mode, the part that is judged as non equilibrium disk is then carried out data read with one second read mode, this first read mode and this second read mode can switch between different reading speeds separately, with the optimization servo-drive system and read the efficient of disc, and the high reading speed of this second read mode is the high reading speed less than this first read mode, can carry out read operation with the reading speed that on average is lower than when reading normal sheet so that make when reading uneven sheet.So; make the discs of 3g can be read and can read in high-revolving mode; simultaneously; the unequal situation of part weight distribution greater than the discs of 3g if can't read with high rotating speed; also the slow-revving mode of effective drop reads; thereby wrong probability takes place to detect with the reduction non equilibrium disk in the sheet success ratio of declaring that has improved optical pickup device; so successfully reached development fundamental purpose of the present invention; but the present invention must be thought and is to modify as all by the personage Ren Shi craftsman who has the knack of this skill, right neitherly takes off the desire protection as attached claim institute.
Claims (3)
1. a non equilibrium disk detection method is applied to the processing procedure of an optical pickup device to a discs to be read, it is characterized in that, this non equilibrium disk detection method comprises the following step:
This discs to be read is carried out one first testing process with one first preset rotation speed, and this first testing process comprises the following step:
The detected state of circuit controls is opened in execution one; And
Detect with this first preset rotation speed this discs to be read a tracking error signal stride the rail number, and and one first threshold value and one second threshold value make comparisons, this second threshold value is less than this first threshold value, when this strides the rail number greater than this first threshold value, represent that this discs is a non equilibrium disk, stride the rail number less than this second threshold value when this, represent that this discs is a normal sheet; Stride the rail number between this first threshold value and this second threshold value the time when this, carry out one second testing process with one second preset rotation speed, this second preset rotation speed is less than this first preset rotation speed, and this second testing process comprises the following step:
The detected state of circuit controls is opened in execution one; And
Detect with this second preset rotation speed this discs to be read a tracking error signal stride the rail number, and and one the 3rd threshold value make comparisons, the 3rd threshold value is less than this second threshold value, just judge that when this strides the rail number greater than the 3rd threshold value this discs to be read is a non equilibrium disk, judge just that when this strides the rail number less than the 3rd threshold value this discs to be read is a normal sheet;
Wherein in this first testing process and this second testing process, when this discs to be read is judged as a normal light disc, detection of end also reads with one first read mode, when this discs to be read is judged as a non equilibrium disk, detection of end also reads with one second read mode, and the high reading speed of this second read mode is less than the high reading speed of this first read mode.
2. non equilibrium disk detection method as claimed in claim 1 is characterized in that: the rail number of striding of described this tracking error signal is meant when the track on this discs to be read do detected, and departs from this track and the number of tracks of crossing over.
3. non equilibrium disk detection method as claimed in claim 1 is characterized in that: wherein this first threshold value is 225 numerical value, and this second threshold value is 175 numerical value, and the 3rd threshold value is 72 numerical value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100589811A CN100452177C (en) | 2004-07-28 | 2004-07-28 | Method for examining tunbalanced disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100589811A CN100452177C (en) | 2004-07-28 | 2004-07-28 | Method for examining tunbalanced disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728244A CN1728244A (en) | 2006-02-01 |
| CN100452177C true CN100452177C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100589811A Expired - Fee Related CN100452177C (en) | 2004-07-28 | 2004-07-28 | Method for examining tunbalanced disk |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004055058A (en) * | 2002-07-22 | 2004-02-19 | Pioneer Electronic Corp | Unbalanced disk detector and unbalanced disk detection method |
| CN1482607A (en) * | 2002-09-09 | 2004-03-17 | 建兴电子科技股份有限公司 | Method for distinguishing unbalanced disc of CD-ROM system using swing amplitude |
-
2004
- 2004-07-28 CN CNB2004100589811A patent/CN100452177C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004055058A (en) * | 2002-07-22 | 2004-02-19 | Pioneer Electronic Corp | Unbalanced disk detector and unbalanced disk detection method |
| CN1482607A (en) * | 2002-09-09 | 2004-03-17 | 建兴电子科技股份有限公司 | Method for distinguishing unbalanced disc of CD-ROM system using swing amplitude |
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| Publication number | Publication date |
|---|---|
| CN1728244A (en) | 2006-02-01 |
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