JPS6344182A - Disc testing system - Google Patents

Abstract

PURPOSE:To eliminate restriction from a memory structure in various means regardless of diversification in measuring conditions and sequence on a memory means, by registering measuring conditions and sequence and results of measurement to edit the results of measurement. CONSTITUTION:A measuring conditions preparing means 1 prepares more than one measuring conditions (a) among the position on a signal memory disc, recording, conditions, reproducing conditions and erasing conditions while a measuring sequence preparing means 2 prepares measuring sequences (b) for measuring physical characteristics, regenerated signals and defects to register them on respective memory means 4. A measurement control means 3 sets measuring conditions (a) read out of the memory means 4 and a measurement is performed according to the measuring sequences (b) to register the results (c) of the measurement into the memory means 4. The measuring conditions (a), the measuring sequences (b) and an auxiliary storage of the results (c) of measurement is performed with the memory means 4 as separate file groups. A results of measurement editing means 5 disposes and selects, totalizes an computes the results (c) of measurement referring to the measuring conditions (a) and the measuring sequences (b) to prepare an editing data (d) necessary for a test and a results of tests outputting means 6 performs the tabulation and the construction of the data to be outputted as test results (e).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk testing machine, and particularly to a disk testing system for a signal storage disk device used in an external storage device such as a converter.

[Technological environment]

In recent years, disk testing systems have tended to have larger volumes of measurement data as disk devices become more dense and larger. As reliability increases, there is a trend toward diversification of test conditions and test sequences, and an increase in the types of tests.

[Common technology]

The measurements of the general disc testing system can be roughly divided into the following three types of measurements at any position on the disc.

a) Physical property measurement that measures variations in physical constants on the disk surface that affect the amplitude of the reproduced signal. Examples include measuring the surface runout of a disk, measuring the disk surface accuracy of a magnetic disk, measuring the eccentricity of a pregroup track of an original disk, and measuring the reflectance of an original disk.

b) At least one of no recording, recording, and erasure on the signal storage medium
Measurement of reproduced signal after performing two steps.

For example, media recording sensitivity measurement that measures the reproduced signal amplitude after recording by changing the recording intensity (for example, the incident light power on the medium in the case of the original disk, the magnetic flux density applied by the magnetic medium in the case of the magnetic disk, etc.), or , erasure strength (e.g.,
For magneto-optical disks, the optical power incident on the medium and the input magnetic flux density,
For magnetic disks, media erasure sensitivity measurement measures the reproduction signal amplitude after erasing by changing the magnetic flux density applied to the magnetic medium (for example, the magnetic flux density applied to the magnetic medium), and also measures the carrier frequency component of the reproduction signal after recording at the carrier frequency and at a certain frequency. Measurement of the C/N ratio, which is determined by the ratio of noise components, etc.

C) Defect measurement for detecting amplitude changes in the reproduced signal caused by defects in the signal storage medium after performing at least one of non-recording, recording, and erasing, for example, in the reproduced signal during no recording due to defects in the medium. There is an extra error measurement that measures the included pseudo recorded signal, or a drop act error measurement that determines the drop in the reproduction signal measurement due to a medium defect included in the reproduction signal during recording.

Therefore, testing of signal storage disks requires at least one of the following conditions: arbitrary position on the disk, relative speed between the signal storage medium and the recording/reproducing head, recording frequency, recording intensity, erasing intensity, and detection conditions when measuring defects. The physical characteristic measurement, the reproduced signal measurement, and the defect measurement can be performed in combination by using one as a parameter and a main variable, respectively.

[Conventional technology]

A conventional disk test system includes a means for creating test conditions,
The apparatus includes a test sequence creation means, a test control means, and a test result output means.

Next, a conventional disk testing system will be described in detail with reference to the drawings.

FIG. 5 is a block diagram showing an example of a conventional disk testing system.

The test condition creation means 11 sets the test condition K consisting of the position on the disk, the above-mentioned parameters, and the above-mentioned two main numbers in the test strip middle shot 7 control means 13, and the test sequence creation means 1
2 corresponds to the test condition K and is set in the test control means 13 as a geatance full trial release sequence type of measurement consisting of at least one of the above three deviations ni + ¥, and the test control means 13 Test sequence! Measurements are made in accordance with the test results, the test is controlled, and the test data m is output to the test result output means 14. The test result output means 14 converts the test data m into charts and tables and outputs them as test results.

[Problem that the invention seeks to solve]

The conventional disk test system described above has the following drawbacks because test conditions, test sequences, and test data are managed in memory within the test control means.

(1) If the measurement conditions or measurement sequence are changed, there will be restrictions due to the memory configuration within the test control means.

(2) If the measurement contents that make up the test change, or if there is a change in the test succession conditions, test sequence, or test data, change each of the test condition creation means, test sequence creation means, and test result output means. It is not possible to handle a wide variety of tests.

[Means for solving problems]

The disc testing system of the present invention includes a measurement condition creation means for creating a measurement condition consisting of a position on a signal storage disc, and at least two of recording conditions, reproduction conditions, and erasing conditions, and registering the measurement condition in a storage means; Physical properties 6tl that measure variations in physical constants on the disk surface that affect amplitude
Measurement of reproduced signal after performing at least one of no recording, recording, and erasing on the signal storage medium; and Reproduction due to a defect in the signal storage medium after performing at least one of no recording, recording, and erasing. Measurement sequence creation means for creating and registering a measurement sequence consisting of at least one of: defect measurement for detecting all amplitude changes in a signal and registering it in a storage means; × setting the measurement conditions read from the storage means; measurement control means for performing measurements according to the measurement sequence read from the storage means and registering the measurement results in the storage means; a memory means for performing auxiliary memory; and editing necessary for the test by selecting, summarizing, and calculating the measurement results read from the first memory means with reference to the measurement sequence and the measurement conditions read from the memory means. The apparatus is configured to include a control result editing means for creating data, and a test result output means for creating a table 9 of the edited data and outputting it as a test result.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention.

Measurement condition a, which is the output of measurement condition creation means 1 included in the disk test device shown in FIG. The measurement result C of the measurement sequence creation means 2B is added to the storage means 4. The measurement control means 3 inputs the measurement condition a and the measurement sequence b-f from the storage means 4. The measurement result editing means 5 inputs the measurement result C from the storage means 4 and outputs the edited data d to the test result output means 6. The test result e is output from the test result output means 6.

FIGS. 2A to 2E are flowcharts illustrating the operation sequence of the present invention.

Figure 2 fa) is a flowchart showing the main flow, starting the ground test with measurement conditions and measurement sequences set or registered, reading and setting the measurement conditions, executing the full measurement sequence, and storing the measurement data. A series of sequences in which the measurement results are written to the means and edited are repeated as many times as are registered in the measurement sequence, and the flow is shown to output the test results.

FIG. 2 (bl) is a detailed flowchart of the flow of creating measurement conditions, showing the flow of creating g+1 constant conditions for measurement position, relative velocity, recording frequency, recording strength, erasing strength, and defect measurement detection.

FIG. 2(C) is a detailed flowchart of the measurement sequence creation flow, and shows the creation flow of measurement sequences for physical measurement, reproduced signal measurement, and defect measurement.

FIG. 2(d) is a detailed flowchart of the measurement condition finding and setting flow. - Shows the flow for setting recording strength, erasing strength, recording frequency, and defect measurement detection conditions.

FIG. 2 shows a detailed flowchart 20 of measurement sequence reading and execution flow, in which a measurement sequence is read from the storage means and physical measurements, reproduced signal measurements, and defect side determination are performed in accordance with the read sequence.

FIG. 3 is a block diagram showing one embodiment of the present invention, in which the microcomputer system 21 connected to the disk recording/reproducing section 22, the C-T/KB 24, and the disk recording/reproducing section 22, and the C.
几T/KB2. i, hard disk 23 and printer 26
and a personal computer system 25 connected to the computer system. In the disk test system shown in FIG.
B24,! : The measurement control means 3 consists of a microcomputer system 21 and a disk recording/reproducing section 22, and the storage means 4 consists of a hard disk 23.
The measurement result editing means 5 includes a personal computer system 25 and a CRT.
/KB24, and the test result output means 6 is comprised of a personal computer system 25 and a printer 26.

Next, the operation will be explained using FIGS. 4(a) to 4(a).

FIG. 4 is a diagram showing fa) ¥i, measurement conditions, and measurement sequence. In Figure 4 (at), the measurement conditions are: for surface runout measurement, the measurement positions are the outer circumference and outer circumference; for medium sensitivity measurement, the measurement positions are the inner circumference and outer circumference; and the recording conditions are the recording strength at each position. , recording strength B, and recording strength C.The measurement sequence is: surface runout measurement → medium sensitivity measurement (at recording strength A) → medium sensitivity measurement (at recording strength C) for each of the inner and outer peripheries. →Indicates that the sequence of medium sensitivity measurement (at recording intensity C) is repeated.

Figures 4(b) and 4(c) are diagrams showing examples of measurement results for surface runout measurement and medium sensitivity measurement. There are some measurement results.

Figure 4(d) is a diagram showing an example of the test results.In the evening, the measurement results obtained in the surface runout measurement are edited and output as the maximum overall surface runout test results, and the measurements obtained in the media sensitivity measurement are The results are edited and the average value is output as the test result.

〔Effect of the invention〕

The disk test system of the present invention obtains test results by registering measurement conditions, measurement sequences, and measurement results in the storage means and editing the measurement results. (1) There are many types of measurement conditions and measurement sequences. (2) Even if tests become more diverse, they can be handled by simply changing the measurement result editing means and the test result output means, making it possible to handle a wide variety of tests. This has the effect that it is easy to deal with.

[Brief explanation of drawings]

FIG. 3 is a configuration diagram showing an embodiment of the present invention, and FIG. 4 (aJ
~(dl is an explanatory diagram showing an example of measurement conditions/measurement sequence-measurement results/test results, and FIG. 5 is a block diagram showing an example of a conventional example. 1...Measurement condition creation means, 2. ...Measurement sequence creation means, 3...Measurement control means, 4
... Storage means, 5 ... Measurement result editing means, 6 ... Test result output means, 11 ...
- Test condition creation means, 12...Test sequence creation means, 13...Test control means, 14...
.--Test result output means, 21..Microcomputer system, 22..Disk recording and reproducing section, 23.
...C) *, -=Isk, 24...CR
T/KB, 25...Shij σD Figure 2 (, a) σD Figure 2 (Legs Figure 2 (d)

Claims (1)

[Claims] Creating measurement conditions consisting of a position on a signal storage disk and at least two of recording conditions, playback conditions, and erasing conditions,
Measurement condition creation means to be registered in the storage means, physical property measurement for measuring variations in physical constants on the disk surface that affect the amplitude of the reproduced signal, and at least one of non-recording, recording, and erasing on the signal storage medium. After playback signal measurement and no recording,
Creating a measurement order consisting of at least one of a defect measurement for detecting an amplitude change in a reproduced signal due to a defect in the signal storage medium after performing at least one of recording and erasing, and registering it in the storage means. measurement sequence creation means; measurement control means for setting the measurement conditions read from the storage means, performing measurements according to the measurement sequence read from the storage means, and registering the measurement results in the storage means; storage means for performing auxiliary storage of the measurement sequence and the measurement results as file groups, respectively; A measurement result editing means that performs selection, aggregation, and calculation to create edited data necessary for the test; and a test result output means that tabulates and plots the edited data and outputs it as a test result. disc testing system.