201010805 九、發明說明： . 【發明所屬之技術領域】 本發明是有關於-種監控方法及其監控裝置，特別是 指-種監控熱軋中的鋼帶弯曲與行進偏移之監控方法及其 監控裝置。 【先前技術】 參閱圖1 ’ -般鋼板18在進行熱軋時，會先由一加熱 爐14將該鋼板18加熱，再依序經由-粗乳單元15，及-精軋單70 16’處理形成完軋之鋼帶1G，最後在由—盤捲單 凡Π盤捲成一鋼捲19,然而，熱軋時該鋼帶的平直度 會影響完軋品質，不平直的鋼帶1〇除了會增加寬度控制的 困難度外，亦容易使鋼帶1G於盤捲後所形成之鋼捲19的 卜觀不平整’導致較容易在搬運的過程中受到損壞，前述 之情形將會造成下游工廠在加工前必須先切除不平直或受 知的部分，因而嚴重降低其生產線的產率。 φ 參閲圖2，習知用以偵測進行中鋼帶偏移的方式，其是 利用位於欲偵測之鋼帶10上方的攝影機13，攝取行進中之 該鋼帶10的影像，而其所採用之光源是由放置在該鋼帶⑺ 下方的光源模組12所提供，藉由該鋼帶10遮蔽該光源模 、 所發散之光影，並配合該攝影機13所攝取的影像， 用以判斷該鋼帶10之中心位置的偏移量，當偵測該鋼帶1〇 偏移時，可即時修正，而此類偵測位置是設在粗軋或精軋 的作業過程中，不過，由於該光源模組12是設於該鋼帶1〇 的下方’較容易受到該鋼帶10掉落之碎片刮磨而受損，再 5 201010805 者，一般所用之軋機11的空間有限，不僅使該光源模組12 較不易裝設於該軋冑11 _L，而且在維修上的困難度亦相對 提高。 【發明内容】 因此，本發明之目的，即在提供一種易於偵測鋼帶之 彎曲及偏移量的監控方法。 本發明之另-目的，即在提供一種監控熱乳中的鋼帶 彎曲與行進偏移之監控裝置，藉此準確偵測鋼帶的彎曲及 偏移量。 於是，本發明監控熱軋中的鋼帶彎曲與行進偏移之監 控方法，該鋼帶是藉由至少一軋機予以熱軋，該監控方法 包含一準備步驟、一基本影像定義步驟、一偏移量計算步 驟’及一彎曲量計算步驟。 該準備步驟是將一監控裝置裝設於欲監控的該軋機上 ，該監控裝置是包含一雷射單元、一個設於該軋機上且位 於該雷射單元上方的攝影機，及一與該攝影機電性連接的 處理單元，其中，該雷射單元包括有三個相間隔設置於該 軋機上之線雷射器，該等線雷射器可分別投射出平行於受 該軋機熱軋中之該鋼帶長度方向的一中心雷射線、一左側 雷射線，及一右侧雷射線。 該基本影像定義步驟是令該攝影機先行拍攝一熱軋中 之該鋼帶在無彎曲與無偏移狀態下的基本影像，並將其儲 存於該處理單元，且定義該基本影像中之該鋼帶兩侧分別 為一左侧基線及一右側基線’而該基本影像是攝取該鋼帶 201010805 長度方向的影像，並虚擬一可將該基本影像所呈現的帶狀 區域平分的中橫基線’並且令該左侧基線及右側基線分別 與該中橫基線相交於一第一位置’及一第二位置。 該偏移量計算步驟是令該攝影機持續拍攝該鋼帶行進 中的狀態，而獲得多數張之監控影像，並將該等監控影像 傳送至該處理單元，進而逐一與該基本影像進行比對分析 ，其中’每一監控影像中之該鋼帶的左右兩側是分別與該 基本影像之中橫基線，相交於一第三位置及一第四位置， ® 取該第三位置與該左側雷射線間的最短距離為一左偏距離 ，亦取該第四位置至該右側雷射線間的最短距離為一右偏 距離’再令該處理卓元利用該左偏距離與右偏距離計算出 一偏移量。 該彎曲量計算步驟是取該第一位置與第三位置間的直 線距離為一左曲距離，亦取該第二位置至該第四位置間的 直線距離為一右曲距離，再令該處理單元利用該左曲距離 Φ 與該右曲距離計算出一_曲量。 本發明之功效在於，藉由所述線雷射器之雷射線輔助 定位該基本影像，並將該基本影像與欲監控之鋼帶行進中 所攝取的監控影像相比對，藉此可較容易且準確地取得鋼 帶行進中的偏移量與彎曲量，以實現即時修正鋼帶偏移的 目的，同時，利用該等線雷射器裝設於該鋼帶上方之設計 ，誠有裝配與維修皆便利的功效。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 7 201010805 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閲圖3’本發明監控熱軋中的鋼帶彎曲與行進偏移之 監控裝置之較佳實施例，該鋼帶5是藉由至少一軋機6予 以熱札，而該監控裝置是裝設在欲監控之鋼帶5的軋機6 上，該監控裝置包含一雷射單元2、一設於該軋機6上且位 於該雷射單元2之上方的攝影機3，及一電性連接該攝影機 3的處理單元4,在本實施例中，該處理單元4為一台電腦 〇 該雷射單元2設於該軋機6上，該雷射單元2包括一 設於該軋機6上的滑軌20，及三個設於該滑軌2〇上的線雷 射器21，其中，每一線雷射器21皆可移動地定位於該滑軌 20上。 其中，所述線雷射器21是相互等距相間隔地設置於該 軋機。6上’且位於該鋼冑5上方，其中，設於中間的該線 雷射器是位於該軋機6之中心位置上，並令其兩侧之兩 線雷射器21間的直線距離是大於該鋼帶5之寬度值而所 述線雷射器21分別投射出平行該鋼帶5之長度方向且可供 該攝影機3拍攝的一令心雷射線22、一左侧雷射線Μ，及 一右側雷射線24,且所述該等雷射線22、23及24是 平行。 該攝影機3設於該軋機6上且位於該雷射單元2的上 方’使該攝影冑3可攝取該鋼帶5之長度方向的影像與所 述雷射線22、23及24之影像。 201010805 參閱圖4，本發明熱軋鋼帶彎曲與行進偏移之監控方法 之較佳實施例’包含—準備步驟71、一基本影像定義步驟 72、一偏移量計算步驟73，及一彎曲量計算步驟％。 而本實施例係利用上述監控裝置之較佳實施例來予以 進行，故本實施例中所述及的裝置結構，即是上述監控裝 置之較佳實施’合先述明。 參閱圖3、4,該準備步驟71是將該監控裂置裝設於欲 監控的該札機6上〇 配合參閱圖5，該基本影像定義步驟72是令該攝影機 3先行拍攝該熱軋中之鋼帶5在無㈣與無偏移狀態的影像 ’而獲得-如圖5所示之基本料81，並將其储存於該處 理單兀4 ’且定義該基本影像81中之該鋼帶5兩側分別為 一左侧基線51及-右側基線52，而該基本影像81是攝取 該鋼帶5長度方向的影像，並虛擬一可將該基本影像η所 呈現的帶狀區域平分的中橫基線53,並且令該左侧基線Η 及右側基線52分別與該中橫基線53相交於—第—位置54 ’及一第二位置55。 再請-併參_ 6，該偏移量計算步驟73是令該攝影 機_3持續拍攝該鋼帶5行進㈣狀態，而獲得多數張如圖6 所不之之監控影像82，並將料監㈣像82料储存至該 處理單元4,進而逐—與圖5所示之基本影像Η進行比對 分析，當其比對分析時，每—監控影像82中之該鋼帶$的 左右兩侧是分別與該基本影像81之中橫基線53，相交於一 第三位置56及—第四位置57,且取該第三位置56與該左 201010805 側雷射線23間的最短距離為一左偏距離，並取該第四位 置57至該右側雷射線24間的最短距離為一右偏距離l2， 再令該處理單元4利用該左偏距離q與右偏距離l2計算出 一偏移量。 參閱圖6 ’該左側雷射線23及該右侧雷射線24與該中 心雷射線22之間的距離為平分距離l，若（L- L«2)大於（L· L!)，則該鋼帶5偏右，反之，（l_ LD大於（L_ L2)，則該鋼 帶5偏右，該偏移量是為丨（Ll —L2)/2丨，即該偏移量值 是該右偏距離與該左偏距離的差值一半，再取其絕對值。 參 該彎曲量計算步驟74是取該第一位置54與第三位置 56間的直線距離為一左曲距離，並取該第二位置55至該 第四位置57間的直線距離為一右曲距離L4，再令該處理單 元4利用該左曲距離L3與該右曲距離L4計算出一彎曲量， 其中，該彎曲量值為（Ls + L4) /2，即該左曲距離與該右曲 距離之和的一半是為該彎曲量值。 因此，利用本發明監控熱軋中的鋼帶彎曲與行進偏移 之監控方法，實際使用上，將所述線雷射器21所發射之補鲁 助定位用雷射線，透過該攝影機3拍攝成基本影像81，並 藉由該處理單元4將該基本影像81與鋼帶5行進中之監控 影像82相比對，而取得行進中鋼帶5之偏移量與彎曲量^ 致使其連續、快速的熱軋過程中’能夠準確偵測該鋼帶’5 的f曲外觀及偏移狀況’所以，可即時透過水平軋機與工 作輥兩側（圖未示）的水平高度差，來調整該鋼帶5彎曲的弧 形狀況，以及利用輸送輥輪組所搭配的邊導器（圖未示），來 10 201010805 改善該鋼冑5的偏移問題，然而，上述之構件並非本發明 所欲強調之所在’在此不再詳加論述，因&，本發明監^ 熱軋中的鋼㈣曲與行進偏移之監控方法可即時監控該鋼 帶5的偏移狀況並進行校正。 再者，由於所述所述線雷射器21設置於該攝影機3與 該鋼帶5之間，且所射出的雷射線與該料5平行因此 ，可避免將其監控裝置設於該㈣5底下而造成機具的磨201010805 IX. Description of the invention: [Technical field of the invention] The present invention relates to a monitoring method and a monitoring device thereof, and particularly to a monitoring method for monitoring bending and traveling deviation of a steel strip in hot rolling and Monitoring device. [Prior Art] Referring to Fig. 1 'When the steel sheet 18 is subjected to hot rolling, the steel sheet 18 is first heated by a heating furnace 14, and then sequentially processed through the - coarse milk unit 15, and - finishing sheet 70 16' After the rolling of the steel strip 1G, the coil is rolled into a coil 19 by the coiled coil, however, the flatness of the strip during hot rolling will affect the quality of the finished strip, and the flat steel strip is 1〇. In addition to increasing the difficulty of width control, it is also easy to make the irregularity of the steel coil 19 formed by the steel strip 1G after coiling, which makes it easier to be damaged during handling, and the foregoing situation will cause downstream The factory must cut off the uneven or known parts before processing, thus seriously reducing the yield of its production line. φ Referring to FIG. 2, a conventional method for detecting the offset of the ongoing steel strip is obtained by taking the image of the steel strip 10 in motion by using the camera 13 located above the steel strip 10 to be detected. The light source used is provided by the light source module 12 placed under the steel strip (7), and the steel strip 10 shields the light source module, the diverged light and shadow, and cooperates with the image taken by the camera 13 to determine The offset of the center position of the steel strip 10 can be corrected immediately when detecting the offset of the steel strip 1 ,, and the detection position is set during the rough rolling or finishing operation, however, The light source module 12 is disposed under the steel strip 1 'is easily damaged by the scraping of the steel strip 10 and is damaged by the scraping of the steel strip 10, and the space of the rolling mill 11 generally used is limited, not only The light source module 12 is less likely to be installed in the rolling rim 11_L, and the difficulty in maintenance is relatively increased. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a monitoring method that is easy to detect the bending and offset of a steel strip. Another object of the present invention is to provide a monitoring device for monitoring the bending and travel deflection of steel strips in hot milk, thereby accurately detecting the bending and offset of the steel strip. Accordingly, the present invention monitors a method for monitoring bending and travel deviation of a steel strip in hot rolling, the steel strip being hot rolled by at least one rolling mill, the monitoring method comprising a preparation step, a basic image defining step, and an offset The quantity calculation step 'and a bending amount calculation step. The preparation step is to install a monitoring device on the rolling mill to be monitored, the monitoring device comprises a laser unit, a camera disposed on the rolling mill and located above the laser unit, and a camera and an electromechanical device a processing unit for connecting, wherein the laser unit comprises three line lasers arranged at intervals on the rolling mill, the line lasers respectively projecting the steel strip parallel to the hot rolling of the rolling mill A central lightning ray in the longitudinal direction, a left ray, and a right ray. The basic image defining step is to enable the camera to take a basic image of the steel strip in a hot rolling without bending and offset, and store it in the processing unit, and define the steel in the basic image. The two sides of the belt are a left baseline and a right baseline, respectively, and the basic image is an image capturing the length direction of the steel strip 201010805, and a virtual medium-horizontal baseline that bisects the strip region represented by the basic image and The left baseline and the right baseline are respectively intersected with the middle and horizontal baselines at a first location 'and a second location. The offset calculation step is to enable the camera to continuously capture the state in which the steel strip is traveling, and obtain a plurality of monitoring images, and transmit the monitoring images to the processing unit, and then perform comparison analysis with the basic images one by one. , wherein the left and right sides of the steel strip in each of the monitoring images are respectively intersected with the horizontal baseline of the basic image, intersecting at a third position and a fourth position, and the third position and the left thunder ray are taken The shortest distance between the two is a left-biased distance, and the shortest distance between the fourth position and the right-hand lightning ray is a right-biased distance, and then the processing unit uses the left-right distance and the right-off distance to calculate a partial deviation. Transfer amount. The bending amount calculation step is that the linear distance between the first position and the third position is a left curved distance, and the straight line distance between the second position and the fourth position is a right curved distance, and then the processing is performed. The unit calculates a _memory using the left curvature distance Φ and the right curvature distance. The effect of the invention is that the basic image is assisted by the lightning rays of the line laser, and the basic image is compared with the monitoring image taken during the traveling of the steel strip to be monitored, thereby making it easier And accurately obtain the offset and the amount of bending in the traveling of the steel strip, so as to achieve the purpose of correcting the deviation of the steel strip in real time, and at the same time, the design of using the above-mentioned line laser device to be installed above the steel strip is assembled and Maintenance is convenient. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiment of FIG. Referring to Figure 3, a preferred embodiment of the monitoring device for monitoring the bending and travel deviation of a steel strip in hot rolling, the steel strip 5 is hot-rolled by at least one rolling mill 6, and the monitoring device is installed On the rolling mill 6 of the steel strip 5 to be monitored, the monitoring device comprises a laser unit 2, a camera 3 disposed on the rolling mill 6 above the laser unit 2, and an electrical connection to the camera 3. The processing unit 4 is in the embodiment, the processing unit 4 is a computer, the laser unit 2 is disposed on the rolling mill 6, and the laser unit 2 includes a slide rail 20 disposed on the rolling mill 6, And three line lasers 21 disposed on the slide rails 2, wherein each line of the lasers 21 is movably positioned on the slide rails 20. Here, the line lasers 21 are disposed at equal intervals to each other at the rolling mill. 6 is above and located above the reed 5, wherein the line of lasers disposed in the middle is located at the center of the rolling mill 6, and the linear distance between the two lines of lasers 21 on both sides is greater than The width of the steel strip 5 and the line laser 21 respectively project a stellar ray 22, a left ray ray, and a left ray ray 22 which are parallel to the length direction of the steel strip 5 and are available for the camera 3 to capture. The right ray ray 24, and the thunder rays 22, 23 and 24 are parallel. The camera 3 is disposed on the rolling mill 6 and located above the laser unit 2 so that the photographing cassette 3 can take an image of the longitudinal direction of the steel strip 5 and the images of the lightning rays 22, 23 and 24. 201010805 Referring to FIG. 4, a preferred embodiment of the method for monitoring the bending and travel offset of a hot rolled steel strip of the present invention includes a preparation step 71, a basic image definition step 72, an offset calculation step 73, and a bending amount calculation. step%. The present embodiment is carried out by using the preferred embodiment of the above monitoring device. Therefore, the device configuration described in the present embodiment is a preferred embodiment of the above monitoring device. Referring to FIG. 3 and FIG. 4, the preparation step 71 is to install the monitoring split on the machine 6 to be monitored. Referring to FIG. 5, the basic image defining step 72 is to enable the camera 3 to take the hot rolling first. The steel strip 5 is obtained in the absence of the image of the (four) and non-offset state - the base material 81 as shown in FIG. 5, and stored in the processing unit 4' and defining the steel strip in the basic image 81 5 is a left side baseline 51 and a right side baseline 52, respectively, and the basic image 81 is an image of the length direction of the steel strip 5, and the virtual one can equally divide the strip area represented by the basic image η. The horizontal baseline 53 and the left baseline 右侧 and the right baseline 52 intersect the mid-horizontal baseline 53 at a - position 54 ' and a second position 55, respectively. Then, please refer to -6, the offset calculation step 73 is to let the camera_3 continue to capture the traveling (four) state of the steel strip 5, and obtain a plurality of monitoring images 82 as shown in FIG. 6, and the image monitoring (four) image The material is stored in the processing unit 4, and then compared with the basic image 所示 shown in FIG. 5, and when the comparison is analyzed, the left and right sides of the steel strip $ in each monitoring image 82 are respectively The horizontal base line 53 of the basic image 81 intersects with a third position 56 and a fourth position 57, and the shortest distance between the third position 56 and the left 201010805 side lightning ray 23 is a left offset distance. The shortest distance between the fourth position 57 and the right thunder ray 24 is a right deviation distance l2, and the processing unit 4 uses the left offset distance q and the right offset distance l2 to calculate an offset. Referring to FIG. 6 'the distance between the left thunder ray 23 and the right thunder ray 24 and the central ray ray 22 is a bisector distance l, if (L - L « 2) is greater than (L · L!), the steel The band 5 is rightward, and vice versa, (l_LD is greater than (L_L2), then the steel strip 5 is to the right, and the offset is 丨(Ll - L2)/2丨, that is, the offset value is the right deviation The difference between the distance and the left offset is half, and the absolute value is taken. The step of calculating the bending amount is to take the straight distance between the first position 54 and the third position 56 as a left curvature distance, and take the first The linear distance between the two positions 55 to the fourth position 57 is a right curved distance L4, and the processing unit 4 calculates a bending amount by using the left curved distance L3 and the right curved distance L4, wherein the bending amount is Is (Ls + L4) /2, that is, half of the sum of the left curvature distance and the right curvature distance is the bending amount value. Therefore, the monitoring method for monitoring the bending and traveling deviation of the steel strip in hot rolling by using the invention In actual use, the Ray ray, which is emitted by the line laser 21, is positioned as a basic image 81 by the camera 3, and by The processing unit 4 compares the basic image 81 with the monitoring image 82 in which the steel strip 5 is traveling, and obtains the offset and the amount of bending of the running steel strip 5 so that it can be accurately and continuously in the hot rolling process. Detecting the appearance and offset of the steel strip '5', it is possible to instantly adjust the curved shape of the steel strip 5 by the horizontal difference between the horizontal rolling mill and the two sides of the work roll (not shown). And using the side guides (not shown) of the transport roller set to improve the offset problem of the reed 5 by 10 201010805, however, the above-mentioned components are not the place to be emphasized by the present invention. In addition, the monitoring method of the steel (four) curve and the travel offset in the hot rolling of the present invention can monitor the offset condition of the steel strip 5 and correct it in real time. The emitter 21 is disposed between the camera 3 and the steel strip 5, and the emitted thunder rays are parallel to the material 5, thereby avoiding the installation of the monitoring device under the (4) 5 and causing the grinding of the implement.
損與維修的困擾，即可較容易且準確地㈣該鋼帶5的偏 移量與彎曲量。 歸納上述，本發明監控熱軋中的鋼帶彎曲與行進偏移 之監控方法’是湘所述線雷射器21之雷射線輔助定位， 且拍攝成基本影像81，並將該基本影像81與鋼帶5行進中 的監控影像82相比對’避免將監控裴置裝設於該鋼帶5下 方而造成設備的損壞及增加維修的困擾，藉此可較容易且 準確地取得鋼帶5行進中的偏移量與彎曲量，，實現即時 修正鋼帶偏差的功效，故確實能達到本發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一立體圖，說明一般熱軋鋼帶之態樣； 圖2是一示意圖，說明習知偵測鋼帶偏移量之裝置熊 樣； .'、 11 201010805 圖3是一立體圖，說明本發明熱軋鋼帶彎曲與行進偏 移之監控裝置之較佳實施例；及 圖4是一流程圖，說明本發明熱軋鋼帶彎曲與行進偏 移之監控方法之較佳實施例。 圖5是一示意圖，說明該較佳實施例之基本影像；及 圖6是一示意圖，說明該較佳實施例比對監控影像與 基本影像。The damage and maintenance troubles make it easier and more accurate (4) the amount of deflection and bending of the steel strip 5. In summary, the monitoring method for monitoring the bending and traveling deviation of the steel strip in the hot rolling of the present invention is the lightning-assisted positioning of the line laser 21 of the line, and is taken as the basic image 81, and the basic image 81 is The traveling image 82 of the steel strip 5 is in trouble of avoiding the damage of the equipment and the maintenance of the equipment by installing the monitoring device below the steel strip 5, thereby making it possible to obtain the steel strip 5 easily and accurately. In the offset and the amount of bending, the effect of correcting the deviation of the steel strip is realized, so that the object of the present invention can be achieved. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are all It is still within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a state of a generally hot rolled steel strip; Fig. 2 is a schematic view showing a conventional device for detecting the offset of a steel strip; .', 11 201010805 Fig. 3 A perspective view illustrating a preferred embodiment of a monitoring device for bending and traveling offset of a hot rolled steel strip of the present invention; and FIG. 4 is a flow chart illustrating a preferred embodiment of a method for monitoring bending and travel offset of a hot rolled steel strip of the present invention . Figure 5 is a schematic view showing the basic image of the preferred embodiment; and Figure 6 is a schematic view showing the preferred embodiment comparing the surveillance image with the basic image.
12 201010805 【主要元件符號說明】 2…雷射單元 21··線雷射器 22*·中心雷射線 23 ·>左側雷射線 24 ··右側雷射線 3…攝影機 4…處理單元 5…鋼帶 51 ·左側基線 5 2 ··右侧基線 53··中橫基線 54··第一位置 55··第二位置 56 ·第三位置 57·。第四位置 6…軋機 71"準備步驟 72·•基本影像定義步驟 73…偏移量計算步驟 74”彎曲量計算步驟 81 ·基本影像 82"監控影像 L…平分距離 ••左偏距離 L2 *·右偏距離 L3 ‘·左曲距離 L4 "右曲距離 1312 201010805 [Description of main component symbols] 2...Laser unit 21··Line laser 22*·Center lightning ray 23 ·>Left ray 24 ··Right ray 3...Camera 4...Processing unit 5...Steel strip 51. Left side baseline 5 2 · Right side baseline 53 · Middle horizontal base line 54 · First position 55 · Second position 56 · Third position 57 ·. Fourth position 6...Roller 71"Preparation step 72·•Basic image definition step 73...Offset calculation step 74” Bending amount calculation step 81·Basic image 82"Monitoring image L...Balancing distance••Left deviation distance L2*· Right deviation distance L3 '· Left curvature distance L4 " Right curvature distance 13