1310546 五、發明說明α) 【發明所屬之技術領域】 本發明有關一種測量方法及其裝置，尤其關於利用步 進馬達移動距離與移動距離内所測量到的光碟片軌數，將 兩者相除以得到光碟片執距的一種測量光碟片執距的方法 及其裝置。 -【先前技術】 隨著光儲存媒體的發展，各種不同規格的光碟片不停 地發展，從CD開始，接著有CD-R、CD-RW、DVD、DVD-R、 DVD-RW、DVD + RW等，每一種光碟片都有不同的規格，如時 ^長度、資料長度、軌道間距、染料種類等。在實際製造 上，每一片光碟片的規格又有差異，如0 : 2 : 0 (零分兩秒 零區塊）的位置，以及光碟片中央空心圓的位置等。因 此，光碟機在讀取光碟片時，會因為光碟片的差異，而有 讀取時間上的差異。例如，每一次光碟機讀取光碟片都會 計算光碟片的軌道間距、最内圈資料執道半徑長度、最外 圈資料軌道半徑長度以及光碟片的資料軌道數目。利用這 些資料，光碟機可以判定光碟片種類，以及資料讀取剩餘 時間。因此，上述數據計算準確與否，關係到資料讀取剩 餘時間的估算的精確度。 • 現在有一些技術，如中華民國專利公告第49 48 33號 『線速度與軌道間距之校正裝置與方法』是以主軸馬達旋 轉週期為基準，以0 : 2 : 0位置位於實體碟片半徑為2 5 mm 為基準，以資料密度比值作為半徑長度比值計算出執距。 然而實體碟片的製造上，首先碟片空心圓心可能會偏心，1310546 V. OBJECT DESCRIPTION OF THE INVENTION α) Technical Field of the Invention The present invention relates to a measuring method and apparatus thereof, and more particularly to dividing the number of optical disc tracks measured by a stepping motor in a moving distance and a moving distance A method and device for measuring the distance of an optical disc from a disc. - [Prior Art] With the development of optical storage media, CDs of various specifications have been continuously developed, starting with CDs, followed by CD-R, CD-RW, DVD, DVD-R, DVD-RW, DVD + RW, etc., each type of disc has different specifications, such as time length, data length, track pitch, dye type and so on. In actual manufacturing, the specifications of each disc are different, such as 0: 2: 0 (zero-two-second zero block) position, and the position of the central hollow circle of the disc. Therefore, when a disc player reads an optical disc, there is a difference in reading time due to the difference in the disc. For example, each time the CD player reads a disc, it calculates the track pitch of the disc, the length of the innermost data track radius, the outermost data track radius length, and the number of data tracks of the disc. Using this information, the disc player can determine the type of disc and the time remaining for reading the data. Therefore, whether the above data is calculated accurately or not is related to the accuracy of the estimation of the remaining time of data reading. • There are some technologies, such as the Republic of China Patent Bulletin No. 49 48 33 “Linear and Track Spacing Correction Devices and Methods” based on the spindle motor rotation period, with a 0:2:0 position at the physical disk radius Based on 2 5 mm, the data density ratio is used as the radius length ratio to calculate the distance. However, in the manufacture of physical discs, first of all, the hollow center of the disc may be eccentric.
第6頁 1310546 五、發明說明（2) 無法具有準石t的0 : 2 : 0位置，因此算出的軌距有誤差。 因此，如何避免複雜的計算所帶來的誤差，以最簡單又準 確的方法測量出光碟片軌距，將是業者所盼望的。 •【發明内容】 • 本發明之目的在於提供一種測量光碟片執距的方法及 其裝置，俾能夠利用驅動讀取裝置進退的驅動伺服單元輸 出的訊號以準確測量碟片軌距，以改善以往利用承載讀取 裝置的另一驅動裝置旋轉週期以及設定〇 : 2 : 0位置位於 I實體碟片半徑為25mm為基準所計算出來的軌距所產生的誤 差。 本發明另一目的在於提供一種測量光碟片軌距的方法 及其裝置，俾能夠利用一個計數單元計算讀取裝置在移動 一距離内所測量到的光碟片執道數目。 本發明的又一目的在於提供一種測量光碟片軌距的方 法及其裝置，俾能夠利用一個微處理器，將驅動伺服單元 的輸出訊號轉換的一距離，並將該距離除以該距離内讀取 裝置所讀取到的光碟片軌道數目，以得到準確度高的光碟 片軌距。 • 為了達到前述發明的目的，本發明之一種測量碟片軌 距的方法及其裝置，利用一個微處理器讀取燒錄於一個唯 讀記憶體的驅動裝置脈衝數，再讀取儲存於一暫存記憶體 的光碟片軌數。在執行軌距測量之前，燒錄於唯讀記憶體 的脈衝數必須乘上單位脈衝轉動角度再乘上單位角度所推Page 6 1310546 V. INSTRUCTIONS (2) There is no 0: 2: 0 position of the quasi-stone t, so the calculated gauge has an error. Therefore, how to avoid the errors caused by complicated calculations and measure the track gauge of the optical disc in the simplest and most accurate way will be expected by the industry. • [Description of the Invention] It is an object of the present invention to provide a method and apparatus for measuring the distance of an optical disc, and to accurately measure the track gauge by using a signal output from a drive servo unit that drives the reading device to advance and retreat to improve the past. The rotation period of the other driving device carrying the reading device and the error of the track distance calculated by setting the 〇: 2:0 position on the I-body disk radius of 25 mm as a reference. Another object of the present invention is to provide a method and apparatus for measuring the track pitch of an optical disk, and a counting unit can be used to calculate the number of optical disk tracks measured by the reading device within a distance of movement. It is still another object of the present invention to provide a method and apparatus for measuring the track pitch of an optical disk, which can utilize a microprocessor to convert a distance of the output signal of the driving servo unit and divide the distance by the distance. Take the number of optical disk tracks read by the device to obtain a highly accurate optical disk track. In order to achieve the object of the foregoing invention, a method and apparatus for measuring a track gauge of a disk of the present invention utilizes a microprocessor to read the number of pulses of a drive device that is programmed in a read-only memory, and then read and store it in a The number of disc tracks in the scratch memory. Before performing the gauge measurement, the number of pulses burned in the read-only memory must be multiplied by the unit pulse rotation angle and multiplied by the unit angle.
第7頁 1310546 五、發明說明（3) 進的位移量，得到驅動裝置推進讀取單元移動的總位移 量，總位移量再除以位移期間讀取裝置所讀取到的光碟片 軌數，便得到光碟片軌距，該碟片軌距儲存回該暫存記憶 體，方便主機索取光碟片資訊時讀取。 -·【實施方式】 有關本發明為達成上述目的，所採用之技術手段及其 功效，茲舉較佳實施例，並配合圖式加以說明如下。 請參考第1圖所示，其係為本發明所測量的光碟片軌 示意圖。本發明一種測量碟片軌距的方法係為了量測光 碟片軌距。如圖所示，光碟片1 0的資料軌道1 2之間具有軌 距L，光碟片1 0具有中心空心圓1 1，用以嵌入光碟機的光 碟片固定機構（圖未示），本發明便是要藉由在一定距離 内，量測該距離内的軌數，將兩者相除以得到光碟片軌 距。 請參考第2圖所示，係為本發明測量軌距的機構裝置 示意圖。其具有唯讀記憶體2卜暫存記憶體2 2、處理器 2 3、驅動伺服單元2 4、讀取伺服單元2 5、驅動裝置2 6、讀 取裝置2 7、以及光碟片2 8。當驅動裝置2 6 (在本實施例為 .進馬達）轉動時，帶動讀取裝置2 7 (在本實施例為讀取 頭）前後移動以讀取光碟片2 8上資料。首先在唯讀記憶體 2 1燒錄一預定的脈衝數目。這個脈衝數目代表光碟機在進 行光碟片軌距測量時，所要給與驅動伺服單元2 4用以驅動 驅動裝置2 6轉動的步數。接著處理器2 3讀取唯讀記憶體2 1Page 7 1310546 V. Description of invention (3) The amount of displacement, the total displacement of the drive device to advance the movement of the reading unit, and the total displacement is divided by the number of tracks of the optical disk read by the reading device during the displacement. The track gauge of the optical disc is obtained, and the track gauge is stored back to the temporary storage memory, so that the host can read the information of the optical disc. - EMBODIMENT OF THE INVENTION The present invention has been made in accordance with the preferred embodiments of the present invention in order to achieve the above objects and the advantages thereof. Please refer to Fig. 1, which is a schematic view of the optical disk track measured by the present invention. A method of measuring the track gauge of the present invention is to measure the track pitch of the optical disk. As shown in the figure, the data track 1 2 of the optical disc 10 has a track distance L, and the optical disk 10 has a central hollow circle 1 1 for embedding an optical disk fixing mechanism (not shown) of the optical disk drive. That is, by measuring the number of tracks in the distance within a certain distance, the two are divided to obtain the track gauge of the optical disc. Please refer to Fig. 2, which is a schematic diagram of the mechanism device for measuring the gauge distance of the present invention. It has a read-only memory 2, a temporary memory 2, a processor 2 3, a drive servo unit 24, a read servo unit 25, a drive unit 26, a read unit 27, and a disc 28. When the driving device 26 (in the present embodiment, the motor) rotates, the reading device 27 (in this embodiment, the reading head) is moved to read the data on the optical disk 28. First, a predetermined number of pulses are burned in the read-only memory 2 1 . The number of pulses represents the number of steps that the drive servo unit 24 is used to drive the drive unit 26 to rotate when the disc is being measured. Then the processor 23 reads the read-only memory 2 1
第8頁 1310546 五、發明說明（4) 的脈衝數目數值，並命令驅動伺服單元2 4驅動驅動裝置2 6 轉動，帶動讀取裝置2 7沿著光碟片2 8的徑向移動，同時處 理器2 3命令讀取伺服單元2 5控制讀取裝置2 7讀取跨越光碟 片2 8的執道數目。由於預定的脈衝數目可經處理器2 3運算 出位移量（計算過程將於下文詳述），並暫存於暫存記憶體 -2 2。同時偵測的軌數也暫存於暫存記憶體2 2。處理器2 3内 部有一個相除功能，從暫存記憶體2 2取出位移量與軌數進 行相除，即可得到軌距值，並將該執距值儲存回暫存記憶 體2 2，方便系統隨時讀取之用。 > 請參考第3圖所示，其係為本發明處理器2 3中計算單 元之測量執距電路方塊圖。首先由讀取脈衝數目電路方塊 3 1讀取脈衝數目，再藉由計算讀取頭移動距離電路方塊3 2 計算出對應的位移量。位移量係由脈衝數目乘上每一單位 脈衝驅動步進馬達旋轉角度再乘上每一單位角度對應的位 移量所得到。同時計算軌數電路方塊3 3計算讀取裝置2 7所 偵測到的光碟片2 8軌數。緊接著軌距計算電路方塊3 4讀取 來自於計算讀取頭移動距離電路方塊3 2的位移量及根據讀 取裝置2 7光源投射在光碟片2 8資料軌上與資料軌之間空白 處，使得尋執伺服系統下的跨軌誤差訊號產生正弦波，利 p計算軌數電路方塊3 3計算正弦波個數，便得到在讀取裝 置2 7移動距離内所經過的光碟片2 8軌數，將兩者相除以得 到軌道間距並由輸出執距電路方塊3 5輸出該軌道間距。 請參考第4圖，其係為本發明之測量軌距流程圖。其 流程為：Page 8 1310546 V. The numerical value of the number of pulses of the invention (4), and commands the driving of the servo unit 24 to drive the driving device 26 to rotate, and drives the reading device 27 to move along the radial direction of the optical disk 28 while the processor 2 3 Command Read Servo Unit 2 5 Controls the reading device 2 7 to read the number of lanes across the optical disc 28. Since the predetermined number of pulses can be calculated by the processor 23 (the calculation process will be described later in detail) and temporarily stored in the temporary memory -2 2 . The number of tracks detected at the same time is also temporarily stored in the temporary memory 2 2 . The processor 2 3 has a phase dividing function, and the displacement amount is extracted from the temporary memory 2 2 and divided by the number of tracks to obtain the gauge value, and the distance value is stored back to the temporary memory 2 2 . Convenient system for reading at any time. > Please refer to FIG. 3, which is a block diagram of the measurement distance circuit of the calculation unit in the processor 23 of the present invention. First, the number of pulses is read by the number of read pulses circuit block 3 1 , and the corresponding amount of displacement is calculated by calculating the read head moving distance circuit block 3 2 . The displacement is obtained by multiplying the number of pulses by each unit of the pulse to drive the stepping motor rotation angle and multiplying the displacement amount corresponding to each unit angle. At the same time, the calculated track number circuit block 3 3 calculates the number of tracks of the optical disk detected by the reading device 27. Immediately after the gauge calculation circuit block 34 reads the displacement amount from the calculation read head movement distance circuit block 3 2 and according to the reading device 27 light source projected on the optical disk 28 data track and the space between the data tracks So that the cross-track error signal under the search servo system generates a sine wave, and the calculation of the number of sine waves by the block number circuit block 3 3 obtains the optical disk 28 track that passes through the moving distance of the reading device 27 The number is divided by the two to obtain the track pitch and outputted by the output pitch circuit block 35. Please refer to FIG. 4, which is a flow chart of the measurement gauge of the present invention. The process is:
第9頁 1310546 五、發明說明（5) 步驟4 1 :開始進行光碟片2 8軌距量測動作； 步驟4 2 :自唯讀記憶體2 1中讀取預先燒錄好的脈衝數目； 步·驟4 3 :根據步驟4 2所讀取的脈衝數目驅動讀取裝置2 7位 移並且驅動其運作； 步驟4 4 :由脈衝數目乘上每一單位脈衝驅動步進馬達旋轉 •角度再乘上每一單位角度對應的位移量的計算公式，經由 處理器2 3運算出步驟4 2的脈衝數目數值所對應的讀取裝置 2 7位移量； 步驟4 5 :計算讀取頭2 7讀取到的光碟片2 8軌數。 步驟46 :讀取來自於步驟44的位移量及步驟45的軌數，將 兩者相除以得到執道執距； 步驟4 7 :輸出步驟4 6所得到的軌道軌距； 步驟4 8 :結束光碟片2 8執距量測動作。 綜上所述，本發明利用事先燒錄於唯讀記憶體的脈衝 數目，乘上其所驅動的步進馬達單位脈衝轉動量，再乘上 單位脈衝轉動量所對應的位移量，準確地決定讀取頭移動 的距離，同時在這段移動距離内，讀取頭讀取到的光碟片 軌數很準確，誤差值很小，因此計算出來的光碟片軌距很 準確，其準確度遠高於以往利用光碟片0 : 2 : 0位置處於 丨，徑25mm處為基準，以資料密度比值作為半徑長度比值來 計算出的軌距更為準確，確實達到發明專利新穎性、進步 性與產業利用性的標準，故依法提出發明專利申請，希望 能夠核準，俾能夠嘉惠社會。 以上所述者，僅為用以方便說明本發明之較佳實施Page 9 1310546 V. Description of the invention (5) Step 4 1: Start the measurement of the optical disc 28 8 gauge; Step 4 2: Read the number of pre-burned pulses from the read-only memory 2 1; Step 4 3: Drive the reading device 27 displacement according to the number of pulses read in step 4 2 and drive its operation; Step 4 4: Multiply the number of pulses by each unit pulse to drive the stepper motor rotation • Angle and multiply The calculation formula of the displacement amount corresponding to each unit angle is calculated by the processor 23 to calculate the displacement amount of the reading device 27 corresponding to the pulse number value of the step 4 2; Step 4 5: Calculating the reading head 2 7 reading The number of discs is 2 8 tracks. Step 46: Read the displacement amount from step 44 and the number of tracks in step 45, divide the two to obtain the execution distance; Step 4 7: output the track gauge obtained in step 46; Step 4 8: End the optical disc 2 8 distance measurement action. In summary, the present invention utilizes the number of pulses previously burned in the read-only memory, multiplies the unit pulse rotation amount of the stepping motor driven by it, and multiplies the displacement amount corresponding to the unit pulse rotation amount to accurately determine The distance over which the head moves is read, and within this moving distance, the number of tracks of the optical disk read by the read head is very accurate, and the error value is small, so the calculated track pitch of the optical disk is very accurate, and its accuracy is much higher. In the past, the optical disc 0: 2: 0 position is at the 丨, the diameter is 25mm as the reference, and the data density ratio is used as the radius length ratio to calculate the gauge distance is more accurate, which indeed achieves the novelty, advancement and industrial utilization of the invention patent. Sexual standards, so the invention patent application was filed in accordance with the law, hoping to be approved, and can benefit the society. The above is only for the convenience of explaining the preferred implementation of the present invention.
第10頁 1310546 五、發明說明 例，本發 做的任何 -請-專利之 (6) 例，凡依本發明所 下，皆屬本發明申 明之範圍不限於該等較佳實施 變更，於不脫離本發明之精神 範圍。Page 10 1310546 V. Illustrative examples of the invention, any of the patents (6) of the present invention, the scope of the invention is not limited to the preferred implementation changes, It is within the spirit of the invention.