KR960005532A

KR960005532A - How to determine the disk type

Info

Publication number: KR960005532A
Application number: KR1019940017505A
Authority: KR
Inventors: 한석연
Original assignee: 이헌조; 엘지전자 주식회사
Priority date: 1994-07-20
Filing date: 1994-07-20
Publication date: 1996-02-23

Abstract

본 발명은 디스크 종류 판별 방법에 관한 것으로, 종래에는 F.G의 갯수를 계수하는 경우 또는 일정 분당 회전수까지 상승하는 시간을 측정하는 경우 전원 변동이나 사용되는 데크의 편차 또는 모터의 편차를 고려하기 않음으로 인하여 외부 요인에 의한 계수치의 변동량 때문에 디스크의 종류 판단에 오류가 발생하는 문제점이 있었다. 따라서, 이러한 문제점을 개선하기 위하여 본 발명은 스핀들 서보의 가속 동작 후 소정 시간동안 F.G 펄스를 계수함에 따라 데크 특성에 따른 연산값을 산출하고 이 연산 값을 디스크 별 고정 기준치와 연산하여 가변 기준치를 산출하므로써 재생동작시 외란 및 편차에 상관없이 디스크의 종류를 판별하여 스핀들 이득을 조정하도록 창안한 것으로, 본 발명은 디스크의 재생시 여러가지 외란 및 편차에 상관없이 디스크의 종류를 판별하여 스핀들 서보의 이득을 제어할 수 있으므로 안정된 재생 동작을 수행할 수 있어 시스템의 신뢰성을 향상시킬 수 있다.The present invention relates to a disc type determination method, which conventionally does not take into account power fluctuations, deviations in decks used, or motor deviations when counting the number of FGs or measuring the time to rise to a certain number of revolutions per minute. Therefore, there is a problem that an error occurs in determining the type of the disk due to the variation of the coefficient value due to external factors. Accordingly, in order to solve this problem, the present invention calculates an operation value according to the deck characteristic as the FG pulse is counted for a predetermined time after the acceleration operation of the spindle servo and calculates the variable reference value by calculating the operation value with the fixed reference value for each disk. Therefore, the present invention was designed to adjust the spindle gain by discriminating the type of disc regardless of disturbance and deviation during the reproducing operation. Since control can be performed, stable reproducing operation can be performed and the reliability of a system can be improved.

Description

How to determine the disk type

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명 디스크 판별 장치의 블럭도,3 is a block diagram of a disc discrimination apparatus of the present invention;

제4도 및 제5도는 본 발명 디스크 판별을 위한 신호 흐름도.4 and 5 are signal flow diagrams for disc determination of the present invention.

Claims

A first step of determining the presence or absence of a disc when the power is stabilized after the system has been basicized, and a second step of operating a timer and determining the occurrence of an FG pulse while accelerating the spindle if there is no disc in the first step; A third step of incrementing the count value by "1" each time the FG pulse occurs in the second step and determining whether the timer reaches a predetermined time; and when the timer reaches the predetermined time in the third step, counting the count value using the standard FG And a fifth step of calculating an operation value according to the characteristics of the deck by dividing by a value, and a fifth step of calculating a variable reference value by multiplying the operation value calculated in the fourth step by a fixed reference value for each disc. How to determine.

The method according to claim 1, wherein the count value is increased by "1" every time the FG pulse is generated, and when the count value is greater than or equal to the predetermined value, the operation time is calculated by dividing the timer time by the standard acceleration time. Discrimination method characterized by the above-mentioned.

※ Note: The disclosure is based on the initial application.