200906166 九、發明說明： . 【發明所屬之技術領域】 • 本發明係涉及一種成像精度控制系統，尤其係涉及一 種用於掃描器的成像精度控制系統及其控制方法。 【先前技術】 ' 按，隨著電子技術的日新月異，個人電腦已成為曰常 ' 生活及工作環境中不可缺少產品，使用者藉由個人電腦可 ( 處理文書資料、觀看圖像、聆聽音樂與連接網際網路等。 另外，個人電腦與電腦周邊產品搭配使用後更可實現多種 功能。例如，使用者藉由個人電腦與投影機搭配可觀看電 影，藉由個人電腦與印表機搭配可列印資料與圖像，藉由 個人電腦與掃描器搭配可將文件與圖像轉成電子檔案。 在上述的產品中，尤其以掃描器為使用者最優先選購 的電腦週邊產品。一般而言，要將大量文件轉成電子檔案 ί 時，需透過鍵盤與滑鼠等個人電腦週邊產品逐字輸入，屆 ' 時將耗費許多的時間。但是，使用者僅需透過掃描器即可 將大量的文件轉成電子檔案並儲存於個人電腦中，因此， 使用者即可省去打字時間。而現今的掃描器均具有彩色掃 描的功能，不只能掃描黑白文件，還可掃描彩色文件與圖 片等。 現今的掃描器可分為掌上式掃描器、平台式掃描器、 饋紙式掃描器、菲林掃描器、大尺寸掃描器、照相掃描器 6 200906166 二:筒式掃“器等。在上述多種掃福器種類中，又以平台 :與饋紙式掃描器最為使用者所青睞。乎台式掃描 乃將待成像物置於掃描平台上，在婦描時，驅動馬達與 動皮w動強力日光燈管，將強光照射到待成像物上， /、來反射之後會傳到感光元件之上’例如CCD感測器，之 後感光元件將不同強弱的光束轉為強弱不一的電流並傳 厂 i類比/數位㈣，類比/數位轉換器再將電流_比訊號 轉成數位化唬，而該數位信號可被顯示於螢幕上及儲存於 個人電腦中。 惟，在掃描文件時，平台式掃瞄器一次只能掃描一張 文件。當使用者欲掃描多張文件時，需將文件一張一張替 換並放置掃描平台上，屆時使用者將耗費許多時間於文件 的替換與擺設上。為改善上述平台式掃描器的缺點，於是 有馈紙式掃描器的產生。饋紙式掃描器乃以馬達帶動滾 、 輪’利用滾輪將待掃描文件一張一張饋入掃描器中’使得 待掃描文件依序通過CCD感測器。藉此，使用者可省去替 換文件與放置文件的時間。 惟’館紙式掃描器之滾輪須以一定的速度帶動待掃描 文件，使得待掃描文件依序通過CCD感測器，當滾輪損耗 時，其帶動待掃描文件的速度也隨其消耗而變慢，待掃描 文件通過CCD感測器的速度亦隨之變慢。屆時將影響掃描 放大率’進一步造成待成像物之影像品質變差。 7 200906166 緣是，本發明人有感上述缺失之可改善，乃特潛心研 究’終於m料合理且有収善上频失之本發明。 【發明内容】 本發明目的之-係提供—種成像精度控㈣統，㈣ 控制一成像裝置之成像速度，成像精度控制系統具有感测 模組、類比/數位轉換器、記憶單元、處理單元與ρ·電 路、。感測模組包括發光體與光感應體，發光體提供投射光 束並將光束技射至待成像物上，光感應體榻取待成像物之 影像並將像物叙舰/触轉㈣，舰/數㈣換器接收 來自光感應體的影像並將該影像由類比信號轉成數位信 號，記憶單元儲存一基準圖像與一基準位移值，處理單元 接收類比/數轉換輸出的數健號，處理單元比較該數 位信號與基準圖像後產生一參考位移值，處理單元根據該 >考位移值與基準位移值之差異控制P而電路，使得 PWM電路調整所產生的脈波信號的頻率，以控制成像襄置 之成像速度。 本發明另-目的係提供一種採用如上所述的成像精度 控制系統的控制方法，包括如下步驟： 步驟.设定基準位移值並將基準位移值儲存在記憶 單元中； 步驟一.利用感測模組擷取待成像物之類比影像，該 類比办像透過類比/數位轉換器轉成基準圖像後儲存在記憶 200906166 單元中； 步驟三：利用感測模組再次擷取待成像物之類比參 像，該類比影像透過類比/數位轉換器轉成更新圖像至 處理單元； 步驟四：比較更新圖像與儲存在記憶單元的基準 後產生一參考位移值； V驟五·利用處理單元判斷參考位移值是否等於儲存 在記憶單元的基準位移值，當參考㈣值等於基準位移 值，執行步驟七，當參考位移值不等於基準位移值，執行 步驟六； 步驟…處理單70根據參考位移值與基準位移值之差 異调签PWM電路之輸出脈波信號；及 ^驟七以更新圖像取代基準圖像並儲存在記憶單元 中，之後執行步驟三。 如上所述，本發明之成像精度控制系統透過感測模組 擷取待成像物之基準圖像與更新圖像’之後，處理單元比 較基準圖像與更新圖像之差異，並根據該差異控制pwM電 路，使得PWM電路調整輸出的脈波信號的頻率，以控制成 像裝置之成像速度。 【實施方式】 為詳細說明本發明之技術内$、所達成#目的及功 效，以下茲舉實施例並配合圖式詳予說明。 200906166 請參閱第一圖所示，本發明之成像精度控制系統100 可運用於掃瞄器與影印機等電子產品中，本發明實施例 中，以掃瞄器為例說明。掃瞄器具有殼體90，於殼體90内 定義有一掃描路徑，於掃描路徑上依序設置有取紙滾輪 91、分紙滾輪92、饋紙滾輪93、步進馬達94、掃描模組 95與退紙滾輪96。待成像物97，例如紙張、照片或卡片等 片狀物，首先透過取紙滾輪91被帶至掃描路徑中，之後， 依序經過分紙滾輪92與饋紙滾輪93，藉由步進馬達94帶 動饋紙滾輪93，待成像物97被帶至掃描模組95，掃描模 組95掃描完待成像物97後，退紙滚輪96帶動待成像物97 並將待成像物97帶離掃描路徑。 請參閱第一圖與第二圖所示，第二圖為本發明成像精 度控制系統100的電路方塊圖。本發明之成像精度控制系 統100具有感測模組1、放大器2、類比/數位轉換器3、處 理單元4、記憶單元5與PWM電路6。本發明實施例中， 感測模組1設置於掃目苗器之掃描路徑上並設置於饋紙滾輪 93與掃描模組95之間，感測模組1具有發光體10與光感 應體11，本發明實施例中，發光體10為發光二極體，光感 應體11可為CCD感測器或CMOS感測器。 當待成像物97通過感測模組1時，發光體10提供投 射光束並將光束投射至待成像物97上，藉此，光感應體11 可擷取待成像物97之影像。放大器2分別連接感測模組1 200906166 與類比/數位轉換器3，放大器2接收來自感測模組ι之光 感應體11触的影像，並將該影像放大後傳至類比/數位轉 換器3，之後，類比/數位轉換器3將接收到的類比影像轉 成數位信號。處理單元4分料接類比/數位轉換器3、記 十思羊7〇 5與PWM電路6。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging precision control system, and more particularly to an imaging precision control system for a scanner and a control method therefor. [Prior Art] 'Press, with the rapid development of electronic technology, personal computers have become an indispensable product in the living and working environment. Users can use personal computers (processing documents, viewing images, listening to music and connecting) Internet, etc. In addition, personal computers and computer peripheral products can be used to achieve a variety of functions. For example, users can watch movies with a personal computer and a projector, and can be printed by a personal computer and a printer. Data and images can be converted into electronic files by using a personal computer and a scanner. Among the above products, the scanner is the most preferred computer peripheral product for users. In general, To convert a large number of files into electronic files, you need to input them verbatim through keyboard and mouse peripherals, etc., and it will take a lot of time. However, users only need to use a scanner to transfer a large number of files. Converted to an electronic file and stored on a personal computer, so users can save typing time. Today's scanners are color-coded. The function of scanning can not only scan black and white files, but also scan color files and pictures, etc. Today's scanners can be divided into handheld scanners, flatbed scanners, sheet-fed scanners, film scanners, and large-size scanners. , Photo Scanner 6 200906166 2: Cartridge sweeper, etc. Among the various types of sweepers mentioned above, it is also the platform: the most popular user of the paper-fed scanner. The desktop scan is to scan the object to be imaged. On the platform, during the woman's drawing, the driving motor and the moving skin w move the powerful fluorescent tube to illuminate the object to be imaged, and then reflect it to the photosensitive element, such as a CCD sensor, and then sensitize it. The component converts different strong and weak beams into strong and weak currents and transmits the i-class ratio/digit (4). The analog/digital converter converts the current_signal to digital, and the digital signal can be displayed on the screen and Stored on a personal computer. However, when scanning a document, the platform scanner can only scan one file at a time. When the user wants to scan multiple files, the file needs to be replaced one by one and placed. On the platform, the user will spend a lot of time on the replacement and placement of the documents. In order to improve the shortcomings of the above-mentioned flatbed scanner, a paper-feeding scanner is produced. The paper-feeding scanner drives the roller and the wheel with a motor. 'Using the scroll wheel to feed the files to be scanned one by one into the scanner', the files to be scanned are sequentially passed through the CCD sensor. Thereby, the user can save the time of replacing the file and placing the file. The scroll wheel of the scanner must drive the file to be scanned at a certain speed, so that the file to be scanned passes through the CCD sensor in sequence. When the roller is worn out, the speed of the file to be scanned is also slowed down with the consumption of the file to be scanned. The speed of the CCD sensor is also slowed down. At that time, the scanning magnification will be affected, which will further deteriorate the image quality of the image to be imaged. 7 200906166 The reason is that the inventor felt that the above-mentioned deficiency could be improved. 'Finally, the material is reasonable and there is a loss of the invention. SUMMARY OF THE INVENTION The object of the present invention is to provide an imaging precision control (four) system, (4) to control the imaging speed of an imaging device, the imaging precision control system has a sensing module, an analog/digital converter, a memory unit, a processing unit and ρ·circuit,. The sensing module comprises an illuminant and a light-sensing body, the illuminant provides a projection beam and the beam is projected onto the object to be imaged, and the image of the image-sensing object is taken by the light-sensing body and the object is described/tacted (four), the ship The /number (four) converter receives the image from the light sensing body and converts the image from the analog signal to the digital signal, the memory unit stores a reference image and a reference displacement value, and the processing unit receives the number of the analog/digital conversion output, The processing unit compares the digital signal with the reference image to generate a reference displacement value, and the processing unit controls the circuit according to the difference between the displacement value and the reference displacement value, so that the PWM circuit adjusts the frequency of the generated pulse wave signal. To control the imaging speed of the imaging device. Another object of the present invention is to provide a control method using the imaging precision control system as described above, comprising the steps of: setting a reference displacement value and storing the reference displacement value in the memory unit; Step 1. Using the sensing mode The group captures the analog image of the image to be imaged, and the analog image is converted into the reference image by the analog/digital converter and stored in the memory of the 200906166 unit; Step 3: using the sensing module to capture the analogy of the object to be imaged again For example, the analog image is converted into an updated image by the analog/digital converter to the processing unit; Step 4: comparing the updated image with the reference stored in the memory unit to generate a reference displacement value; V. V. Using the processing unit to determine the reference Whether the displacement value is equal to the reference displacement value stored in the memory unit, when the reference (four) value is equal to the reference displacement value, step 7 is performed, and when the reference displacement value is not equal to the reference displacement value, step 6 is performed; step... processing unit 70 according to the reference displacement value and The difference between the reference displacement values adjusts the output pulse signal of the PWM circuit; and the seventh step replaces the reference image with the updated image and stores In the memory unit, after performing step three. As described above, after the imaging accuracy control system of the present invention captures the reference image of the object to be imaged and the updated image through the sensing module, the processing unit compares the difference between the reference image and the updated image, and controls according to the difference. The pwM circuit causes the PWM circuit to adjust the frequency of the output pulse signal to control the imaging speed of the imaging device. [Embodiment] In order to explain in detail the purpose and effect of the technology of the present invention, the embodiments will be described in detail below with reference to the drawings. 200906166 Please refer to the first figure, the imaging precision control system 100 of the present invention can be applied to electronic products such as a scanner and a photocopier. In the embodiment of the present invention, a scanner is taken as an example for illustration. The scanner has a housing 90 defining a scanning path in the housing 90. The pickup roller 91, the separation roller 92, the paper feed roller 93, the stepping motor 94, and the scanning module 95 are sequentially disposed on the scanning path. With the paper ejection roller 96. The image to be imaged 97, such as a sheet of paper, photo or card, is first brought into the scanning path by the pickup roller 91, and then sequentially passes through the separation roller 92 and the paper feed roller 93 by the stepping motor 94. The paper feed roller 93 is driven, and the image to be imaged 97 is brought to the scanning module 95. After the scanning module 95 scans the image to be imaged 97, the paper ejection roller 96 drives the image forming object 97 and takes the object to be imaged 97 away from the scanning path. Referring to the first and second figures, the second figure is a circuit block diagram of the imaging accuracy control system 100 of the present invention. The imaging accuracy control system 100 of the present invention has a sensing module 1, an amplifier 2, an analog/digital converter 3, a processing unit 4, a memory unit 5, and a PWM circuit 6. In the embodiment of the present invention, the sensing module 1 is disposed on the scanning path of the scanning device and disposed between the paper feeding roller 93 and the scanning module 95. The sensing module 1 has the luminous body 10 and the light sensing body 11 In the embodiment of the present invention, the illuminant 10 is a light emitting diode, and the light sensing body 11 can be a CCD sensor or a CMOS sensor. When the image forming object 97 passes through the sensing module 1, the illuminant 10 provides a projection beam and projects the beam onto the object to be imaged 97, whereby the light sensing body 11 can capture an image of the object to be imaged 97. The amplifier 2 is respectively connected to the sensing module 1 200906166 and the analog/digital converter 3, and the amplifier 2 receives the image touched by the light sensing body 11 of the sensing module 1 and amplifies the image and transmits it to the analog/digital converter 3 Thereafter, the analog/digital converter 3 converts the received analog image into a digital signal. The processing unit 4 is divided into an analog/digital converter 3, a 10th 5th and a PWM circuit 6.
Ί思平7L π仔I準圖像與基準位移值，處理單 兀4接收來自賴/數位轉鮮3的數⑽號，並比較該數 位信號與儲存在記憶單元5中的基準圖像，之後，處理單 :4產生一參考位移值，處理單元4比較該參考位移值鱼 單元5的基準位移值後，根據比較結果控制 PWM電路6產生脈波信號。 :參閱第二圖與第三圖所示’第三圖為本發明影像形 單元Π Μ1,設定基準位移值並將基準㈣⑽存在記憶 謝：感測模組1擷取待成像物97之類比影像， °亥類比影像透過類比/數位轉 處理單元4儲存在記憶單元5中°;成土 #圖像後，經由 像^驟SG3 ··感測模組1再次擷取待成像物97之類比影 像’该類比影像透過類 至處理單元4; 數位轉換器3轉成更新圖像後傳 200906166 步驟S04:處理單元4比較更新圖像與儲存在記憶單元 5的基準圖像後產生一參考位移值； 步驟S05:處理單元4判斷參考位移值是否等於儲存在 記憶單元5的基準位移值，當參考位移值等於基準位移值， 執行步驟S07，當參考位移值不等於基準位移值，執行步驟 S06 ； ' 步驟S06:處理單元4根據參考位移值與基準位移值之 ( 差異調整PWM電路6之輸出脈波信號；及 步驟S07:以更新圖像取代基準圖像並儲存在記憶單元 5中，之後執行步驟S03。 本發明第一實施例中，PWM電路6連接步進馬達94， 步進馬達94連接饋紙滾輪93。PWM電路6將該脈波信號 送至步進馬達94並控制步進馬達94之轉動速度，藉此， 步進馬達94可帶動饋紙滾輪93，使得饋紙滾輪93帶動待 t 成像物97朝退紙滾輪96移動。 ' 請參閱第四圖與第五圖所示，第四圖係饋紙滾輪93定 速轉動時，感測模組1自待成像物97上掘取的影像示意 圖，第五圖係饋紙滾輪93定速轉動時，PWM電路6之輸 出脈波信號與感測模組1之觸發信號。在發明實施例中， 觸發信號每3微秒產生一觸發脈波，每一觸發脈波均觸發 感測模組1，使感測模組1擷取一次待成像物97上的影像。 當本發明成像精度控制系統100動作時，預設基準位 12 200906166 移值為每㈣G.6微米，基準位移值賴存於記憶單元5 中，而PWM電路6會根據基準㈣值發出—預設頻率的脈 波信號，誠波信號可控财進料94㈣軌滾輪％， 令=紙滾輪93帶動待成像物97朝感測模組！移動，本發 明貫施例中，每—脈波信號可帶動饋紙滾輪93移動〇.6微 米备觸發信號產生第一觸發脈波時（第五圖中標號^， 感測模組1擷取一次待成像物97上的影像（第四圖標號 a ’此時’該第—讀取的影像即作為基準圖像，當觸發 2產生第二觸發脈波時（第五圖中標號〜感測模㈤ /人_待成像物97上的影像（第四圖標號b)，此時，該 弟一次擷取的影像即作為更新圖像。 捭择=PWM電路6持續發出脈波信號，饋紙滾輪93亦 持續π動待成像物97移動，因t， 準圖像之差異，處理單_ 4 错由计异更新圖像與基 實施例中，圖像由8χ8Γ方/异出―參考位移值。本發明 米的差 且成，每各方格均代表0.6微 ' ’更新圖像（第四圖標號b)與基準 四圖標號〇的參考位移值為18微米。邱像（弟 感每3微秒錄—次待成像物^之 ^及刚後二人影像之參考位移值為18微米，因此，饋紙滾 輪3之真正帶動速度為每 、’、 相等。因此，_;:Γ=微米，其與基準位移值 使得饋紙滾輪93持:二持=預設咖 、、只依目則速度帶動待成像物97移動。 13 200906166 而待成像物97也依預設速度通過掃描模組％。之後，更新 圖像取代基準圖像並儲存於記憶單元5巾。依照上述說明， 田感測模組1再次擷取待成像物97影像後，pwM電路6 與處理單元4亦比照上述說明動作。 明參閱第六圖與第七圖所示’第六圖係饋紙滾輪93在 不疋速轉動牯，感測模組丨自待成像物97上擷取的影像示 〜圖第七圖係饋紙滾輪93在不定速轉動時，pWM電路6 之輸出脈波信號與感測模組1之觸發信號。 、當觸發信號產生第-觸發脈波時（第七圖中標號a)， 感測模組1擷取-次待成像物97上的影像（第六圖標號 此時’該第-次操取的影像即作為基準圖像，當觸發 信號產生第二觸發脈波時（第七圖中標號b)，感測模組工 再次擷取待成像物97上的影像（第六圖標號b)，此時，該 第一次擷取的影像即作為更新圖像。 士藉由PWM電路6持續發出脈波信號，饋紙滾輪93亦 持、W動待成像物97移動，因此，藉由計算更新圖像與基 ^圖像之差異，處理單元4可算出—參考位移值。本發明 實施例中，更新圖像（第六圖標號b)與基準圖像（第六圖 標號a)的參考位移值為12微米。 藉由計算感簡組1每3微秒練-絲成像物9 7之 影像及前後次影像之參考位移值為12微米，因此，饋紙滾 輪93之真正帶動速度為每微秒〇 4微米，其與基準位移值 14 200906166 ^相等’且其與預設基準位祕每微秒G 6微㈣少三分之 二的連度°因此’處理單元4控制PWM電路6調整輸出脈 就。本發明實施例中，處理單^控制PWM電路6使 其^ 3喊秒内輸出4次脈波信號，使饋紙滚輪％提升三分 迷度已财原先不足的速度。之後，更新圖像取代 基準圖像並儲存於記憶單元5中。 如上所述’本發明成像精度控制系統1GG透過調整 P:電路6輸出脈波訊號之頻率以控制饋紙滾輪幻帶動 圹物97、的速度’使待成像物97依照所需速度通過掃 田吴:95，進一步控制掃推模組95之成像精度。 :參閱第八圖所示，第八圖為本發明成像精度控制系 @第"實施例的電路方塊圖。本發明第二實施例中， ^路^連接掃描模組95，pWM電路6將該脈波信號 =^組95並控制掃描模組95掃描待成像物97的頻 〇 請參閱第四圖與第九圖所示，第九圖係饋紙滾輪％定 ^轉動4 ’ PWM電路6之輸出脈波信號與感測模組1之觸 ^就。當本發明成像精度控制系、統100動作時，預設基 j移值為每U秒0.6微米，基準位移值被儲存於記憶單元 而PWM電路6會根據基準位移值發出一預設頻率的 ^波^#u ’該脈波信號可觸發掃描模組95，使掃描模組95 帚私待成像物97。本發明實施例中，預設pWM電路6每i 15 200906166 微秒產生一脈波信號並觸發掃描模組95，使得掃描模組％ 每1微秒掃描待成像物97 —次。 本發明實施例中’觸發信號每3微秒產生一次脈波以 觸發感測模組卜使得感_組丨每3微秒擷取—次待成像 物97上的影像。當觸發信號產生第_脈波時（第九圖中標 諕a)，感測換組i擷取一次待成像物97上的影像（第四圖 標號a) ’此時’言亥第一次擷取的影像即作為基準圖像，當 觸發信號產生第二脈波時（第九圖中標號b)，感測模組ι ^次擷取待成像物97±的#彡像（第四圖標號b)，此時，該 第二次擷取的影像即作為更新圖像。 〜藉由計算更新圖像與基準圖像之差異，處理單元4可 异出-—參考位移值。本發明實施例中，圖像由8χ8的方格 組成’每各方格均代表〇. 6微米的差距。因此，更新圖像(第 四圖m)與基準圖像（第四圖標號a)的參考位移值為 •8微米。藉由计算感測模組1每3微秒擷取—次待成像物 97之衫像及前後次影像之參考位移值為18微米，因此， 饋、’氏滾輪93之真正帶動速度為每微秒μ微米，其與基準 位移值相等。 因此，PWM電路6持續以每1微秒產生-脈波信號並 觸發掃描模組95,使得掃描模組％持續以每^秒掃描待 =象物97 -次。之後’更新圖像取代基準圖像並儲存於記 〜單兀5中。依照上述說明，當感測模組丨再次擷取待成 16 200906166 像物97影像後（第四圖標號c)，pWM電路6與處理單元 4亦比照上述說明動作。 請參閱第六圖與第十圖所示，第十圖係饋紙滾輪93不 定速轉動時，PWM電路6之輸出脈波信號與感測模組！之 觸發信號。當觸發信號產生第一觸發脈波時（第十圖中標 =)，感測模組i擷取—次待成像物97上的影像（第⑽ W")’此時’該第一次擷取的影像即作為基準圖像，當 觸發信號產生第二觸發脈波時（第十圖中標號b )，感測= 組/再次擷取待成像物97上的影像（第六圖標號b)，此時， "亥第一次擷取的影像即作為更新圖像。 Μ藉由計算更新圖像與基準圖像之差異，處理單元4可 :出一參考位移值。本發明實施例中，更新圖像（第六圖 ，破㈧與基準圖像（第六圖標號a)的參考位移值為12 米藉由计异感測模組j每3微秒擷取一次待成像物π 之影像及前後切像之參考位移值為1.2 «，因此，饋紙 滚輪93 4正帶動速度為每微秒G.4 «，其與基準位移 不相等’且其與預設基準位移值每微秒0·6微米減少三 分之一的速度。 因此，處理單元4控制pWM電路6調整輸出脈波信 I。^發明實施例中，處理單元4控制PWM電路6使其 倣心輸出1次脈波信號，使掃描模組95減少三分之— ' 速度以補足原先不足的速度。之後，更新圖像取代 17 200906166 毕圖像並儲存於記憶單元5中。如上所述，本發明成像 精度控制系統100藉由調整PWM電路6輸出脈波信號之頻 率以控制掃描模組95掃描待成像物97的速度，進-步控 制掃描模組95之成像精度。 >、’不上所述’本發明之成像精度控制系统⑽透過感測 模組1擷取待成像物97之影像後，類比/數位轉換器3將該 影像轉成基準圖像儲存在記憶單元5中，感測模組工再次 棕取待成像物97之影像後，類比/數位轉換器3將該影像轉 成更新圖像’之後’處理單元4計算基準圖像與更新圖像 之差異並算出參考位移值，處理單元*計算參考位移值與 儲存在，己隐單兀5的基準位移值的差異後，根據該差里^ 制PWM電路6，令驗電路6調整輸出的脈波信號。、工 、該脈波信號可輸出至步進馬達94，進-步控制步進馬 達94之轉動速度，使步進馬達％控制饋紙滾輪％帶動 成像物97的速度。另外，該脈波信號亦可輸出至掃描模組 95 ’進-步控制掃描模组95之掃描速度。藉此，本發明成 像精度控制系統⑽可控制控制饋紙滾輪％轉動速度與 描模組95之掃描球声，、仓止、 、度進一步控制掃描模組95之成像精 度。 【圖式簡單說明】 一第-圖係本發明之成像精度控制系統設置於掃描 之不意圖。 18 200906166 之電 第二圖係本發明之成像精度控制系統第一實施例 路方塊圖。 圖。 第三圖係本發明之成像精度控㈣狀控制方法流程 第四圖係饋紙滾輪定速轉動時，感測模組自待成像物 上擷取的影像示意圖。 弟五圖係馈紙滾輪定速轉動時，pWM電路之輸出脈 信號與感測模組之觸發信號示意圖。 / 第六圖係饋紙滾輪在不定速轉動時，感測模組 像物上擷取的影像示意圖。 战 第七圖係饋紙’袞輪在不定速轉動時，電路之 脈波信號與感測模組之觸發信號示意圖。 別出 第八圖係本發明之成像精度控制系統第 路方塊圖。 只犯列之電 一第九衰輪《速轉動時，電路之 信號與感測模組之觸發信號。 j出脈波 第十_饋紙滾輪不定逮轉動時，PWM電路 波h號與感測模組之觸發信號。 輪出脈 【主要元件符號說明】 成像精度控制系統 ]()π 1 ^ , ° 感測模組 發光體 1ΩΊ思平 7L π仔 I quasi-image and reference displacement value, processing unit 4 receives the number (10) from Lai/Digital 3, and compares the digital signal with the reference image stored in the memory unit 5, after The processing list: 4 generates a reference displacement value, and after the processing unit 4 compares the reference displacement value of the reference displacement value fish unit 5, the PWM circuit 6 is controlled to generate a pulse wave signal according to the comparison result. : Refer to the second and third figures. The third figure is the image-shaped unit Π Μ1 of the present invention. The reference displacement value is set and the reference (4) (10) is stored. The sensing module 1 captures the analog image of the image to be imaged 97. The analog image is stored in the memory unit 5 through the analog/digital conversion processing unit 4; after the image is formed, the image of the image to be imaged 97 is again captured by the sensing module 1 'The analog image is transmitted through the class to the processing unit 4; the digital converter 3 is converted into an updated image and transmitted to 200906166. Step S04: The processing unit 4 compares the updated image with the reference image stored in the memory unit 5 to generate a reference displacement value; Step S05: The processing unit 4 determines whether the reference displacement value is equal to the reference displacement value stored in the memory unit 5. When the reference displacement value is equal to the reference displacement value, step S07 is performed, and when the reference displacement value is not equal to the reference displacement value, step S06 is performed; Step S06: The processing unit 4 adjusts the output pulse wave signal of the PWM circuit 6 according to the difference between the reference displacement value and the reference displacement value; and step S07: replacing the reference image with the updated image and storing it in the memory unit 5 Then, step S03 is performed. In the first embodiment of the present invention, the PWM circuit 6 is connected to the stepping motor 94, and the stepping motor 94 is connected to the paper feed roller 93. The PWM circuit 6 sends the pulse wave signal to the stepping motor 94 and controls the stepping. The rotational speed of the motor 94, whereby the stepping motor 94 can drive the paper feed roller 93, so that the paper feed roller 93 drives the image forming object 97 to move toward the paper ejection roller 96. 'Refer to the fourth and fifth figures. The fourth picture is a schematic diagram of the image captured by the sensing module 1 from the object to be imaged 97 when the paper feeding roller 93 rotates at a constant speed. The fifth picture is the output pulse of the PWM circuit 6 when the paper feeding roller 93 rotates at a constant speed. The trigger signal of the wave signal and the sensing module 1. In the embodiment of the invention, the trigger signal generates a trigger pulse every 3 microseconds, and each of the trigger pulses triggers the sensing module 1 to make the sensing module 1 The image on the object to be imaged 97 is taken once. When the imaging precision control system 100 of the present invention operates, the preset reference bit 12 200906166 is shifted to (4) G.6 micrometers, and the reference displacement value is stored in the memory unit 5, and the PWM circuit 6 will be issued according to the reference (four) value - the pulse signal of the preset frequency, Chengbo No. controllable feed 94 (four) rail roller %, let = paper roller 93 drive the object to be imaged 97 toward the sensing module! Move, in the embodiment of the invention, each pulse signal can drive the paper feed roller 93 to move. When the 6 micron standby trigger signal generates the first trigger pulse wave (the number in the fifth figure is ^, the sensing module 1 captures the image on the object to be imaged 97 (the fourth icon number a ' at this time' the first-read The image is used as the reference image. When the trigger 2 generates the second trigger pulse (the number in the fifth figure, the sense mode (5) / the image on the image to be imaged (the fourth icon number b), at this time, The image captured by the younger brother is used as an updated image. = = = PWM circuit 6 continuously emits a pulse wave signal, and the paper feed roller 93 also continues to move the image forming object 97, because of the difference between the t and the quasi-image, the processing single _ 4 error is updated by the difference image and the basic embodiment In the image, the image is made up of 8χ8Γ/distance-reference displacement value. The difference between the meters of the present invention is that each of the squares represents a 0.6 micro'' update image (fourth icon number b) and a reference four icon number 〇 has a reference displacement value of 18 μm. Qiu image (different every 3 microseconds recorded - the image to be imaged ^ and the reference displacement value of the two images immediately after the image is 18 micrometers, therefore, the true driving speed of the paper feed roller 3 is equal to each, ', and equal. , _;: Γ = micron, and the reference displacement value makes the paper feed roller 93 hold: two holding = preset coffee, only according to the speed of the object to move the image to be moved 97. 13 200906166 and the image to be imaged 97 is also pre- The speed is passed through the scanning module %. After that, the updated image replaces the reference image and is stored in the memory unit 5. According to the above description, after the field sensing module 1 captures the image of the object to be imaged 97 again, the pwM circuit 6 and the processing The unit 4 also operates in accordance with the above description. Referring to the sixth figure and the seventh figure, the sixth picture is the image pickup roller 93 that is rotated at an idle speed, and the sensing module picks up the image taken from the image to be imaged 97. 7 is a trigger signal of the output pulse signal of the pWM circuit 6 and the sensing module 1 when the paper feed roller 93 rotates at a constant speed. When the trigger signal generates a first-trigger pulse (seventh) In the figure, a), the sensing module 1 captures an image on the image to be imaged 97 (the sixth icon number) When the image of the first operation is used as the reference image, when the trigger signal generates the second trigger pulse (label b in the seventh figure), the sensing module again captures the image on the object to be imaged 97. (Sixth icon number b), at this time, the image captured for the first time is used as an update image. The pulse circuit is continuously sent by the PWM circuit 6, and the paper feed roller 93 is also held, and the image to be imaged is moved. Moving, therefore, by calculating the difference between the updated image and the base image, the processing unit 4 can calculate a reference displacement value. In the embodiment of the invention, the updated image (the sixth icon number b) and the reference image (the first The reference displacement value of the six icon number a) is 12 micrometers. By calculating the image of the sensing group 1 every 3 microseconds, the image of the image-forming image and the reference displacement value of the image before and after the image is 12 micrometers, therefore, the paper feeding roller The true driving speed of 93 is 微米4 micrometers per microsecond, which is equal to the reference displacement value of 14 200906166 ^ and it is less than two-thirds of the default reference position per microsecond G 6 micro (four). The unit 4 controls the PWM circuit 6 to adjust the output pulse. In the embodiment of the invention, the processing unit controls the PWM circuit 6 The ^3 pulse output signal is outputted 4 times, so that the paper feed roller % is increased by three degrees, and the original image is insufficient. After that, the updated image replaces the reference image and is stored in the memory unit 5. The imaging precision control system 1GG of the present invention passes the frequency of the P: circuit 6 output pulse signal to control the speed of the paper feed roller phantom moving object 97, so that the object to be imaged 97 passes the Sweeping Wu: 95 according to the required speed. Further controlling the imaging accuracy of the scanning module 95. Referring to the eighth figure, the eighth figure is a circuit block diagram of the imaging precision control system of the present invention. In the second embodiment of the present invention, ^Connecting the scanning module 95, the pWM circuit 6 sets the pulse signal = group 95 and controls the scanning module 95 to scan the frequency of the object to be imaged 97. Please refer to the fourth and ninth diagrams. The paper roller is set to rotate the output pulse signal of the 4' PWM circuit 6 and the touch of the sensing module 1. When the imaging precision control system of the present invention operates, the preset base j shift value is 0.6 micrometers per U seconds, the reference displacement value is stored in the memory unit, and the PWM circuit 6 emits a predetermined frequency according to the reference displacement value. The wave signal ##u' triggers the scanning module 95 to cause the scanning module 95 to smear the image forming object 97. In the embodiment of the present invention, the preset pWM circuit 6 generates a pulse signal every i 15 200906166 microseconds and triggers the scanning module 95, so that the scanning module % scans the object to be imaged 97 every 1 microsecond. In the embodiment of the present invention, the trigger signal generates a pulse wave every 3 microseconds to trigger the sensing module to make the image of the image to be imaged 97 every 3 microseconds. When the trigger signal generates the _th pulse wave (the 諕a in the ninth figure), the sensing group i captures the image on the object to be imaged 97 (fourth icon number a) 'At this time', the first time 言The captured image is used as the reference image. When the trigger signal generates the second pulse wave (label b in the ninth figure), the sensing module ι ^ times the image of the object to be imaged 97± (fourth icon number) b) At this time, the image captured by the second time is used as an update image. By calculating the difference between the updated image and the reference image, the processing unit 4 can deviate from the reference displacement value. In the embodiment of the present invention, the image is composed of squares of 8 ’ 8 'each square represents a gap of 微米 6 μm. Therefore, the reference displacement value of the updated image (Fig. 4m) and the reference image (fourth icon number a) is • 8 μm. By calculating the sensing module 1 every 3 microseconds, the reference image of the image of the image to be imaged 97 and the image of the front and rear images is 18 micrometers. Therefore, the true driving speed of the feeding roller is 93 per micrometer. Seconds μm, which is equal to the reference displacement value. Therefore, the PWM circuit 6 continues to generate the -pulse signal every 1 microsecond and triggers the scanning module 95 so that the scanning module continues to scan the object to be imaged 97 times per second. The 'update image' is then replaced with the reference image and stored in the record. According to the above description, when the sensing module 丨 again captures the image of the image 97 97 (the fourth icon number c), the pWM circuit 6 and the processing unit 4 also operate in accordance with the above description. Please refer to the sixth and tenth diagrams. The tenth figure shows the output pulse signal and sensing module of the PWM circuit 6 when the paper feed roller 93 is not rotating at a constant speed! The trigger signal. When the trigger signal generates the first trigger pulse wave (marked in the tenth figure), the sensing module i captures the image on the image to be imaged 97 (the (10) W") 'this time' the first capture The image is used as the reference image. When the trigger signal generates the second trigger pulse (label b in the tenth figure), the sensing = group / again captures the image on the object to be imaged 97 (the sixth icon number b). At this time, the image captured by "Hai for the first time is used as an update image.处理 By calculating the difference between the updated image and the reference image, the processing unit 4 can: derive a reference displacement value. In the embodiment of the present invention, the reference displacement value of the updated image (the sixth figure, the broken (eight) and the reference image (the sixth icon number a) is 12 meters, and is taken every 3 microseconds by the different sensing module j. The reference displacement value of the image to be imaged π and the front and back image is 1.2 «, therefore, the paper feed roller 93 4 is driving at a speed of G.4 « per microsecond, which is not equal to the reference displacement and it is preset with reference The displacement value is reduced by one third of the speed per microsecond by 0.6 micrometers. Therefore, the processing unit 4 controls the pWM circuit 6 to adjust the output pulse wave signal I. In the embodiment of the invention, the processing unit 4 controls the PWM circuit 6 to be frustrated. The pulse signal is output once, so that the scanning module 95 is reduced by three-way's speed to make up the original insufficient speed. After that, the updated image replaces the 17 200906166 image and is stored in the memory unit 5. As described above, this The imaging precision control system 100 controls the scanning module 95 to scan the speed of the object to be imaged 97 by adjusting the frequency of the pulse signal output by the PWM circuit 6, and further controls the imaging accuracy of the scanning module 95. > The 'imaging precision control system (10) of the present invention has a sense of transmission After the module 1 captures the image of the image to be imaged 97, the analog/digital converter 3 converts the image into a reference image and stores it in the memory unit 5. After the sensor module again takes the image of the image to be imaged 97, The analog/digital converter 3 converts the image into an updated image 'after' the processing unit 4 calculates the difference between the reference image and the updated image and calculates a reference displacement value, and the processing unit* calculates the reference displacement value and stores it in the After the difference of the reference displacement values of 兀5, the PWM circuit 6 is used to adjust the pulse signal of the output according to the difference, and the pulse signal can be output to the stepping motor 94, and the step-by-step control is performed. The rotation speed of the stepping motor 94 causes the stepping motor% to control the speed of the paper feeding roller to drive the image forming object 97. In addition, the pulse wave signal can also be output to the scanning module 95 to scan the scanning module 95. Therefore, the imaging precision control system (10) of the present invention can control the scanning speed of the paper feeding roller and the scanning ball sound of the drawing module 95, and the loading and closing degree can further control the imaging precision of the scanning module 95. Brief description] a first-figure The imaging precision control system of the present invention is not intended to be scanned. 18 200906166 The second diagram of the imaging precision control system of the present invention is a block diagram of the first embodiment. The third diagram is the imaging precision control of the present invention. (IV) Flow control method flow The fourth picture is a schematic diagram of the image captured by the sensing module from the image to be imaged when the paper feed roller rotates at a constant speed. The fifth image is the output pulse signal of the pWM circuit when the paper feed roller rotates at a constant speed. Schematic diagram of the trigger signal with the sensing module. / Figure 6 is a schematic diagram of the image captured by the sensing module when the paper feed roller is rotating at a constant speed. The seventh picture is the paper feeding Schematic diagram of the trigger signal of the pulse signal and the sensing module of the circuit when rotating at a constant speed. 8 is a block diagram of the imaging accuracy control system of the present invention. Only the power of the column. The ninth decline wheel, the trigger signal of the circuit signal and sensing module when the speed is turned. j out of the pulse 10th _ paper feed roller indefinitely caught rotation, PWM circuit wave h and the trigger module of the sensing module. Round pulse [Main component symbol description] Imaging precision control system ]()π 1 ^ , ° Sensing module Illuminant 1Ω
U 放大器 2 光感應體 類比/數位轉換器 19 3 200906166 處理單元 4 記憶單元 5 PWM電路 6 殼體 90 取紙滾輪 91 分紙滾輪 92 饋紙滚輪 93 步進馬達 94 掃描模組 95 退紙滾輪 96 待成像物 97 f % ί 20U Amplifier 2 Optical Inductor Analog/Digital Converter 19 3 200906166 Processing Unit 4 Memory Unit 5 PWM Circuit 6 Housing 90 Pickup Roller 91 Separation Roller 92 Feed Roller 93 Stepper Motor 94 Scanning Module 95 Eject Roller 96 Image to be imaged 97 f % ί 20