TW201524628A - Method and system for automatically monitoring plate shape of steel strip - Google Patents

Abstract

A method and a system for automatically monitoring a plate shape of a steel strip are described. The method for automatically monitoring a plate shape of a steel strip includes the following steps. A plurality of optical laser sensors are disposed in front of a surface of a steel strip, in which the optical laser sensors are separately arranged and parallel to a width direction of the steel strip. While a process of the steel strip is proceeding, a plurality of sensing steps are performed on the steel strip by using the optical laser sensors. Each sensing step obtains plate shape information of the steel strip along the width direction through the optical laser sensors simultaneously, and each plate shape information includes a plurality of differential signals. A plate shape is calculated by using a process controller and each plate shape information.

Description

Steel strip shape automatic monitoring method and system

The present invention relates to a monitoring technique, and more particularly to an automatic monitoring method and system for a steel strip shape.

The galvanizing line is a continuous production line. After the steel coil is pickled and cold rolled, it enters the hot dip galvanizing line. In the hot dip galvanizing line, after welding, surface cleaning and annealing, the coil is placed in a zinc bath for galvanized iron (GI) treatment, or reheated to produce a zinc-iron alloy (GA). Next, the steel coil is subjected to quenching and rolling and tension leveling treatment. Then, according to different needs, the steel coil is subjected to a post-treatment process, such as coating or oiling treatment, and then coiled into a hot-dip galvanized steel coil finished product.

At present, in the galvanizing process of the hot dip galvanizing line, when the width of the steel strip is changed, it is easy to cause the steel strip to have a C-bow, which causes a bad shape of the steel strip and leads to a galvanized film. The problem of uneven thickness. Due to the lack of quantitative data for judgment, if the field operator lacks experience, it is not easy to adjust the shape of the steel strip.

In the quenching and tempering stage of the steel strip after galvanizing, when the steel strips of different sizes and steel grades (such as different tensile amounts) are leveled, the tension is leveled. The area is also prone to C-shaped bending. Moreover, it is impossible to immediately diagnose that the steel strip is C-shaped, which results in a poor shape of the steel strip, which not only causes defects in subsequent process quality, but also causes the steel strip to break in severe cases.

Therefore, an aspect of the present invention is to provide an automatic monitoring method and system for a steel strip shape, which utilizes several optical laser sensors to monitor the shape change of the steel strip during the process, so that steel can be provided. The plate shape with full width direction monitors the quantitative data, and can solve the problem that the shape of the steel strip is not easily adjusted by the naked eye of the operator.

Another aspect of the present invention is to provide an automatic monitoring method and system for a steel strip shape, which enables an online personnel to immediately and effectively grasp a defective shape of a steel strip shape, so that the line personnel can immediately perform the defect of the steel strip shape. Track and improve adjustments.

Another aspect of the present invention is to provide an automatic monitoring method and system for a steel strip shape, which enables an online person to instantly grasp the quality of the steel strip and reduce the defects of the steel strip, thereby greatly improving production efficiency and increasing Capacity.

A further aspect of the present invention provides an automatic monitoring method and system for a steel strip shape, wherein the carrier of the optical laser sensor has an anti-collision design to prevent the broken steel strip from colliding with the optical laser sensing. Therefore, the optical laser sensor can be effectively protected, thereby saving the maintenance cost of the optical laser sensor.

According to the above object of the present invention, an automatic monitoring method for a steel strip shape is proposed, which comprises the following steps. Set a plurality of optical laser sensors In front of the surface of a steel belt. These optical laser sensors are arranged at intervals in the width direction of the parallel steel strips. These optical laser sensors are used to perform a plurality of sensing steps on the steel strip as the process of the steel strip continues. Wherein, each sensing step simultaneously obtains plate shape information of the steel strip in the width direction through the optical laser sensors. Each shape information contains a plurality of differential signals. A plate shape is calculated using a process controller and each shape information.

According to an embodiment of the invention, each of the optical laser sensors includes a laser emitter, a focus lens, and a position sensitive detector (PSD). The laser emitter is adapted to emit a plurality of laser beams toward the surface of the steel strip. The focusing lens is adapted to focus a plurality of scattered reflected light generated after each of the laser beams is reflected by the aforementioned surface. The position sensor is adapted to receive the scattered reflected light after focusing, and correspondingly generate the differential signal described above.

According to another embodiment of the present invention, after the step of calculating the shape of the plate, the automatic monitoring method of the strip shape of the steel strip further comprises controlling the flattening device according to the shape of the plate by using the process controller.

According to still another embodiment of the present invention, after the step of calculating the shape of the plate, the automatic monitoring method of the strip shape of the steel strip further comprises displaying the shape of the sheet by using a visual interface.

According to still another embodiment of the present invention, during the step of calculating the shape of the plate, when the deviation of any of the plate shapes from a reference plate shape exceeds a predetermined value, the automatic monitoring method of the steel strip shape is further improved. Including using an alarm to send a warning signal.

According to still another embodiment of the present invention, the optical laser sensor described above Arrange at the same interval.

In accordance with still another embodiment of the present invention, the step of providing the optical laser sensor in front of the surface of the steel strip includes providing at least five optical laser sensors.

According to the above object of the present invention, an automatic monitoring system for a steel strip shape is also proposed, which is suitable for monitoring the shape change of a steel strip in a process. The steel strip shape automatic monitoring system comprises a plurality of optical laser sensors and a process controller. These optical laser sensors are adapted to simultaneously sense the surface of the steel strip along one of the width directions of the steel strip to obtain a plurality of shape information of the steel strip along the width direction. The process controller is electrically connected to the optical laser sensor described above, and is adapted to receive the shape information, and calculate a shape by using each shape information, and calculate the calculated shape of the plate to one of the steel strip processes. The device regulates the shape of another steel strip that is subsequently subjected to this process.

In accordance with an embodiment of the invention, each of the optical laser sensors includes a laser emitter, a focus lens, and a position sensor. The laser emitter is adapted to emit a plurality of laser beams toward the surface of the steel strip. The focusing lens is adapted to focus a plurality of scattered reflected light generated after each of the laser beams is reflected by the aforementioned surface. The position sensor is adapted to receive the scattered reflected light after focusing and corresponding to generating a plurality of differential signals for each shape information.

According to another embodiment of the present invention, the process controller described above calculates the calculated shape of the plate and feeds it to one of the flattening devices of the steel strip, and controls the leveling device according to the shape of the plates.

According to still another embodiment of the present invention, the process controller includes a processing unit, a visualization interface, and an alarm. Processing unit and upper The optical sensor and the processing device are electrically connected, and are adapted to calculate the shape of the plates, transfer the shapes to the process equipment, and control the process equipment according to the shape of the plates. The visualization interface is electrically connected to the aforementioned processing unit and is adapted to receive and display the data of the shapes of the plates. The alarm is electrically connected to the aforementioned processing unit. The processing unit can control the alarm to emit a warning signal when the deviation of any of the shapes from a reference plate shape exceeds a predetermined value.

According to still another embodiment of the present invention, the steel strip shape automatic monitoring system further includes a plurality of carriers. The optical laser sensor described above can be correspondingly mounted in these carriers. Each of the carriers includes an upper plate, a side plate and a bottom plate. The upper plate and the bottom plate are respectively joined to the two sides of the side plate, and the upper plate is opposite to the bottom plate. When each optical laser sensor is disposed in the corresponding carrier, the front edge of the upper plate and the front edge of the bottom plate protrude from the light exit surface of the optical laser sensor, and the front edge of the bottom plate protrudes from the front edge of the upper plate.

100‧‧‧ method

102‧‧‧Steps

104‧‧‧Steps

106‧‧‧Steps

200‧‧‧Optical laser sensor

200a‧‧‧Optical laser sensor

200b‧‧‧Optical Laser Sensor

200c‧‧‧Optical laser sensor

200d‧‧‧Optical laser sensor

200e‧‧‧Optical Laser Sensor

202‧‧‧Process Controller

204‧‧‧Processing unit

206‧‧‧Visual interface

208‧‧‧Alarm

210‧‧‧Processing equipment

212‧‧‧ steel strip

214‧‧‧ surface

216‧‧‧Width

218‧‧‧width direction

220‧‧‧ Roller

222‧‧‧ Carrier

224‧‧‧Upper board

226‧‧‧ side panels

228‧‧‧floor

230‧‧‧Laser transmitter

232‧‧‧focus lens

234‧‧‧Laser beam

236‧‧‧scattered reflected light

238‧‧‧focus lens

240‧‧‧ position sensor

242‧‧‧ leading edge

244‧‧‧ leading edge

246‧‧‧Glossy

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; Flow chart of the automatic monitoring method.

2 is a block diagram showing the operation of an automatic monitoring system for a strip shape in accordance with an embodiment of the present invention.

3 is a schematic view showing the configuration of an optical laser sensor when monitoring a steel strip shape according to an embodiment of the present invention.

4 is a schematic diagram showing the working principle of an optical laser sensor according to an embodiment of the present invention.

FIG. 5 is a schematic diagram showing experimental measurement results of an automatic monitoring system for a steel strip shape according to an embodiment of the present invention.

In view of the fact that there is no system and method for automatically monitoring the strip shape on-line in real time, this paper proposes an automatic monitoring method and system for strip shape, which can provide the quantitative monitoring of the shape of the strip in the full width direction during the process. Data and cover the range of variations in all strip widths. Therefore, this case can break through the bottleneck of the steel strip shape by the staff in the middle of the traditional technology, which can easily adjust the shape of the steel strip shape by the naked eye, and immediately carry out the defect of the steel strip shape. Tracking and adjustment improvements, and thus the quality of the steel strip meets regulatory requirements.

Most common optical laser sensors are used for accuracy measurement of product sizes in the factory. For example, an optical laser sensor can measure the warpage of a wafer surface in a semiconductor process; a thermal stress warping deformation of a printed circuit board of different materials due to a difference in thermal expansion coefficient; or a surface of a workpiece Non-destructive testing of the weld bead shape to determine weld quality. However, it is rare for applications in steel process-related industries. The automatic monitoring method and system of the steel strip shape proposed in the present case is combined with the optical laser sensor measurement technology to carry out the quality monitoring of the steel strip shape, thereby accurately obtaining the shape quality distribution of the steel strip to be tested. News.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which respectively illustrate an automatic monitoring method for a steel strip shape according to an embodiment of the present invention. A block diagram of the flow chart, the operation of the strip-shaped automatic monitoring system, and a schematic diagram of the configuration of the optical laser sensor when monitoring the strip shape of the strip. In the present embodiment, the steel strip shape automatic monitoring system is utilized to monitor the change of the shape of the steel strip 212 during a process, for example, during the leveling process of the steel strip 212. During this process, the steel strip 212 is guided by the roller 220.

As shown in FIG. 2, the plate-shaped automatic monitoring system of the steel strip 212 may mainly include a plurality of optical laser sensors 200 and a process controller 202. Referring to FIG. 3 together, the optical laser sensors 200, such as optical laser sensors 200a, 200b, 200c, 200d and 200e, can be used to simultaneously sense the steel strip 212 along the width direction 218 of the steel strip 212. The surface 214 is used to obtain a plurality of plate shape information of the steel strip 212 along its width direction 218. In some embodiments, as shown in FIG. 3, optical laser sensor 200 can include five optical laser sensors 200a, 200b, 200c, 200d, and 200e. In other embodiments, the number of optical laser sensors 200 can be adjusted according to the width 216 of the steel strip 212, and can be less than five, and of course more than five. The greater the number of optical laser sensors 200, the more accurate the monitoring results of the steel strip 202 shape. The architecture and operation of the optical laser sensors 200a, 200b, 200c, 200d, and 200e can be the same. In an example, the optical laser sensors 200a, 200b, 200c, 200d, and 200e may be model CD33-250NA optical laser sensors provided by OPTEX, Inc., such optical laser senses. The distance that the detector can measure is 350mm±100mm.

Referring again to FIGS. 2 and 3, the process controller 202 is electrically coupled to all of the optical laser sensors 200, namely, the optical laser sensors 200a, 200b, 200c, 200d, and 200e. Process controller 202 can receive The shape information of the steel strip 212 transmitted from all of the optical laser sensors 200a, 200b, 200c, 200d, and 200e, and the shape of the steel strip 212 is calculated based on the received shape information. In addition, the process controller 202 is also electrically coupled to the process equipment 210 of the steel strip 212. In an exemplary example, process device 210 is a leveling device. The process controller 202 can feed the calculated strips 212 in the width direction 218 thereof to the process equipment 210 of the steel strip 212, and can control the process equipment 210 according to the shape data of the steel strip 212, and Thereby, the plate shape of the steel strip 212 which performs this process in the process apparatus 210 is controlled.

In some embodiments, as shown in FIG. 2, the process controller 202 can primarily include a processing unit 204, a visualization interface 206, and an alarm 208. In the process controller 202, the processing unit 204 is electrically connected to the optical sensors 200 and the process device 210. The processing unit 204 can receive the shape information of the steel strip 212 from the optical laser sensors 200, and calculate the shape of the steel strip 212 based on the received shape information. In addition, the processing unit 204 can transmit the calculated shape of the steel strip 212 to the process equipment 210 during the process, and can control the process equipment 210 according to the sensed and calculated shape of the steel strip 212 to further improve The plate shape of the steel strip 212 of this process is subsequently performed.

In some exemplary embodiments, the processing unit 204 may further have a database to provide a recording function for the board monitoring of the steel strip 212. The online staff can track the shape quality of the steel strip 212 under a certain monitoring time point through the database of the processing unit 204. Using the records of the database can help online staff track, analyze and improve the shape quality of the steel strip 212.

On the other hand, the visualization interface 206 is electrically coupled to the processing unit 204. Visualization interface 206 can be, for example, a display. The visualization interface 206 can receive the shape information of the steel strip 212 calculated by the processing unit 204 from the processing unit 204, and display the shape data of the steel strip 212 to facilitate the online staff to understand and monitor the shape change of the steel strip 212, and accordingly The shape of the steel strip 212 is improved.

The alarm 208 is also electrically coupled to the processing unit 204. In some exemplary examples, the processing unit 204 may cause a deviation between any of the calculated plate shapes of the steel strip 212 and a reference plate shape, such as a plate shape having a flat surface, exceeding a preset. At the time of the value, a warning signal is sent to the alarm 208 to control the alarm 208 to emit a warning signal, such as turning on or flashing the warning light, or sounding an alarm, thereby alerting the online staff to facilitate the online staff to perform the operation immediately. The strain treatment further reduces the defects of the quality of the steel strip 212.

Referring again to FIG. 3, in some embodiments, the strip-shaped automatic monitoring system further includes a plurality of carriers, such as five carriers 222, for respectively loading the optical laser sensors 200a, 200b, 200c, 200d and 200e. That is, the number of carriers 222 is the same as the number of optical laser sensors 200a, 200b, 200c, 200d and 200e, and each carrier 222 is loaded with one of the optical laser sensors 200a, 200b, 200c. , 200d and 200e. In some examples, each carrier 222 has an anti-collision design. That is, each carrier 222 includes an upper plate 224, a side plate 226 and a bottom plate 228. The upper plate 224 and the bottom plate 228 are respectively joined to the two sides of the side plate 226, and the upper plate 224 and the bottom plate 228 are opposite to each other, so that the cross section of the carrier 222 Shape Class-like font. In addition, the bottom plate 228 is longer than the upper plate 224 such that the leading edge 224 of the bottom plate 228 protrudes from the upper plate 224.

The optical laser sensor 200a is used to illustrate how the carrier 222 provides the optical laser sensors 200a, 200b, 200c, 200d, and 200e for collision protection. When the optical laser sensor 200a is mounted in the carrier 222, the light exit surface 246 of the optical laser sensor 200a faces away from the side plate 226 of the carrier 222, and the front edge 242 of the upper plate 224 and the front edge 244 of the bottom plate 228 are both The light exit surface 246 of the optical laser sensor 200a protrudes from the front edge 242 of the upper plate 224. With such a design, when the steel strip 212 is broken, the bottom plate 228 protruding from the leading edge 244 can prevent the broken steel strip 212 that is continuously pulled upward from hitting the optical laser sensor 200a, thereby being effective. The optical laser sensor 200a is protected. Therefore, the maintenance manpower and material resources of the optical laser sensor 200a can be saved.

Referring again to Figures 1 through 3, when the steel strip shape automatic monitoring system is used to monitor the shape of the steel strip 212, the automatic stripping system can be set as described in step 102 of the method 100. The plurality of optical laser sensors are in front of the surface 214 of the steel strip 212. In an exemplary embodiment, as shown in FIG. 2, step 102 provides five optical laser sensors 200a, 200b, 200c, 200d, and 200e in front of surface 214 of steel strip 212.

In some exemplary examples, optical laser sensors 200a, 200b, 200c, 200d, and 200e are spaced apart in a manner parallel to the width direction 218 of steel strip 212. In a preferred embodiment, the optical laser sensors 200a, 200b, 200c, 200d, and 200e are arranged at the same interval in the steel strip 212. In front. For example, if the width 216 of the steel strip 212 is 180 cm, the interval between adjacent optical laser sensors 200a, 200b, 200c, 200d and 200e may be 45 cm, such a configuration can obtain the full width of the steel strip 212 Plate shape change information in the width direction. In the present embodiment, the plate shape measurement of the steel strip 212 is performed by a light scattering triangulation method, wherein such a measurement method is applied to an object surface having a certain roughness, and the measurement accuracy is about ±1 μm. The following is exemplified by the optical laser sensor 200a.

Please refer to FIG. 3 and FIG. 4 together, wherein FIG. 4 is a schematic diagram showing the working principle of an optical laser sensor according to an embodiment of the present invention. In some embodiments, optical laser sensor 200a primarily includes a laser emitter 230, one or more focusing lenses, and a position sensor 240. The laser emitter 230 can be used to emit a plurality of laser beams 234 toward the surface 214 of the steel strip 212. Laser emitter 230 can, for example, comprise a laser diode.

In an exemplary embodiment, optical laser sensor 200a includes two focusing lenses 232 and 238, as shown in FIG. Focusing lens 232 can be used to focus laser beam 234 emitted by laser emitter 230. The focusing lens 238 can be used to focus the scattered reflected light 236 generated by the laser beam 234 after being reflected by the surface 214 of the steel strip 212. In other examples, optical laser sensor 200a may include only one focus lens 238. In addition, the position sensor 240 can be used to receive the scattered reflected light 236 that has been focused by the focusing lens 238 and to resolve the scattered reflected light 236 to generate a corresponding differential signal.

Referring again to FIG. 4, when the laser beam 234 emitted by the laser emitter 230 is focused by the focusing lens 232 and then projected onto the surface 214 of the steel strip 212, the surface 214 of the strip 212 is undulated. These ones The laser beam 234 produces a diffuse reflection that in turn produces scattered reflected light 236. The scattered reflected light 236 is focused by the focusing lens 238 and projected onto the position sensor 240. Position sensor 240 can resolve these scattered reflected light 236. Due to the undulation of the surface 214 of the steel strip 212, or the forward and backward movement of the optical laser sensor 200a relative to the surface 214 of the steel strip 212, the position projected by the focusing lens 238 and projected at the position sensor 240 may change. These position changes cause position sensor 240 to generate a corresponding differential signal. After the differential signals are processed and calculated, the displacement of the points on the surface 214 corresponding to the differential signals can be obtained.

Referring to FIG. 1 to FIG. 3 simultaneously, after the optical laser sensors 200a, 200b, 200c, 200d, and 200e are disposed in front of the surface 214 of the steel strip 212, as described in step 104, when the process equipment 210 is used When the process of the steel strip 212 is performed, the steel strip 212 is simultaneously subjected to several sensing steps using the optical laser sensors 200a, 200b, 200c, 200d, and 200e. In an exemplary embodiment, the process equipment 210 is a leveling device and the process performed by the steel strip 212 is a leveling process. In each sensing step, a plate shape information of the steel strip 212 along its width direction 218 is obtained through the optical laser sensors 200a, 200b, 200c, 200d and 200e at the same time. Due to the height and undulation of the surface 214 of the steel strip 212, the shape information obtained in each sensing step may include several differential signals.

Next, please continue to refer to FIG. 1 to FIG. 3, as described in step 106, through the processing unit 204 in the process controller 202, and using the sensing from the optical laser sensors 200a, 200b, 200c, 200d, and 200e. To each shape information, calculate the steel strip 212 obtained for each sensing step The shape of the plate. The plate shape of the steel strip 212 obtained by each sensing step is integrated to obtain a substantially plate shape change of the entire steel strip 212.

In some embodiments, as shown in FIG. 2, after calculating the shape of the steel strip 212 of each sensing step, the processing unit 204 of the process controller 202 can be utilized, and the calculated steel strip is used. The 212 shape is used to control process equipment, such as leveling equipment, to facilitate the improvement of the shape of the steel strip 212 for subsequent processing.

In other embodiments, as shown in FIG. 2, after calculating the shape of the strip 212 of each sensing step, the visualization interface 206 of the process controller 202 can be used to receive and display the processing unit 204. The shape of the steel strip 212 is calculated to facilitate the online staff to understand and monitor the shape change of the steel strip 212. Thereby, the line staff improves the shape of the steel strip 212.

In still other embodiments, as shown in FIG. 2, during the calculation of the shape of the strip 212 of each sensing step, when the processing unit 204 is in any of the calculated shape of the strip 212 When the deviation between a reference plate shape and a reference plate shape exceeds a predetermined value, the processing unit 204 can send a control signal to the alarm device 208 to control the alarm device 208 to send a warning signal, thereby alerting the online staff. The online staff can perform the strain treatment immediately after being warned to reduce the defects of the quality of the steel strip 212.

Please refer to FIG. 5 , which is a schematic diagram showing experimental measurement results of an automatic monitoring system for a steel strip shape according to an embodiment of the present invention. In this experiment, a total of five points were taken along the width of the steel strip for measurement. In Fig. 5, the upper and lower two broken lines are the defects of the shape of the steel strip before the improvement; The middle solid line is used to monitor the steel strip shape automatic monitoring method and system according to an embodiment of the present invention, and the strip shape of the steel strip obtained after the on-line adjustment of the steel strip shape is immediately performed. It can be seen from Fig. 5 that after using the automatic monitoring technology of the steel strip shape of the present case, the problem that the steel strip shape control is not easy in the field for a long time can be successfully solved, and the defect of the quality of the steel strip can be effectively reduced.

It can be seen from the above embodiments that one of the advantages of the present invention is that the automatic monitoring method and system for the strip shape of the steel strip of the present invention utilizes several optical laser sensors to monitor the shape change of the steel strip during the process. Therefore, the plate shape monitoring quantitative data of the full width direction of the steel strip can be provided, and the problem that the steel strip shape is not easily adjusted by the naked eye of the operator can be solved.

According to the above embodiments, another advantage of the present invention is that the automatic monitoring method and system for the steel strip shape of the present invention can enable the online personnel to grasp the bad shape of the strip shape in an instant and effectively, so that the online personnel can immediately carry out the steel strip. Defect tracking and improvement of the shape of the plate.

According to the above embodiments, another advantage of the present invention is that the automatic monitoring method and system for the steel strip shape of the present invention can enable the online personnel to grasp the quality of the steel strip and reduce the defects of the steel strip, thereby greatly improving the production efficiency. And can increase production capacity.

It can be seen from the above embodiments that another advantage of the present invention is that the automatic monitoring method of the steel strip shape of the present invention and the carrier of the optical laser sensor of the system have an anti-collision design, which can prevent the steel strip from breaking. By the optical laser sensor, the optical laser sensor can be effectively protected, thereby saving the maintenance cost of the optical laser sensor.

While the present invention has been described above by way of example, it is not intended to be construed as a limitation of the scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

200a‧‧‧Optical laser sensor

200b‧‧‧Optical Laser Sensor

200c‧‧‧Optical laser sensor

200d‧‧‧Optical laser sensor

200e‧‧‧Optical Laser Sensor

212‧‧‧ steel strip

214‧‧‧ surface

216‧‧‧Width

218‧‧‧width direction

220‧‧‧ Roller

222‧‧‧ Carrier

224‧‧‧Upper board

226‧‧‧ side panels

228‧‧‧floor

242‧‧‧ leading edge

244‧‧‧ leading edge

246‧‧‧Glossy

Claims (12)

An automatic monitoring method for a steel strip shape comprises: setting a plurality of optical laser sensors in front of a surface of a steel strip, wherein the optical laser sensors are arranged in parallel along a width direction of one of the steel strips When the process of one of the steel strips continues, the optical strip is subjected to a plurality of sensing steps using the optical laser sensors, wherein each of the sensing steps simultaneously passes through the optical laser sensors Obtaining a shape information of the steel strip along the width direction, each of the shape information includes a plurality of differential signals; and calculating a shape by using a process controller and each of the shape information. The method for automatically monitoring the shape of a steel strip according to claim 1, wherein each of the optical laser sensors comprises: a laser emitter adapted to emit a plurality of laser beams toward the surface of the steel strip a focusing lens adapted to focus a plurality of scattered reflected light generated by each of the plurality of laser beams reflected by the surface; and a position sensor adapted to receive the scattered reflected light after focusing, and corresponding The differential signals are generated. The automatic monitoring method for the strip shape of the steel strip according to claim 1, after the step of calculating the shape of the strips, further comprises controlling, by the process controller, a flattening device according to the shape of the strips. The method for automatically monitoring the shape of the steel strip according to claim 1, after the step of calculating the shape of the strips, further comprises displaying the shapes by using a visual interface. The method for automatically monitoring the shape of a steel strip according to claim 1, wherein during the step of calculating the shape of the plurality of shapes, when any one of the plurality of shapes forms a deviation from a reference plate shape by more than a predetermined value, It also includes sending an alert signal using an alarm. The method for automatically monitoring the shape of a steel strip according to claim 1, wherein the optical laser sensors are arranged at the same interval. The method for automatically monitoring the shape of a steel strip according to claim 1, wherein the step of disposing the optical laser sensors in front of the surface of the steel strip comprises providing at least five optical laser sensors. The utility model relates to an automatic monitoring system for a steel strip shape, which is suitable for monitoring the shape change of a steel strip in a process. The automatic monitoring system of the steel strip shape comprises: a plurality of optical laser sensors, which are suitable for simultaneously One surface of the steel strip senses a surface of the steel strip to obtain a plurality of shape information of the steel strip along the width direction; and a process controller is electrically connected to the optical laser sensors, and is applicable to Receiving the shape information, and calculating a shape by using each of the shape information, and calculating the shape of the shape to be fed back to one of the processing devices of the steel strip to regulate another process of the subsequent process. The shape of the steel strip. The steel strip shape automatic monitoring system of claim 8, wherein each of the optical laser sensors comprises: a laser emitter adapted to emit a plurality of lightning rays toward the surface of the steel strip a focus beam; a focus lens adapted to focus a plurality of scattered reflected light generated by each of the plurality of laser beams reflected by the surface; and a position sensor adapted to receive the scattered reflected light after focusing, And corresponding to generating a plurality of differential signals for each of the shape information. The steel strip shape automatic monitoring system according to claim 8, wherein the process controller calculates the plurality of plate shapes and feeds back to the flattening device of the steel strip, and controls the leveling according to the shape of the strip. device. The steel strip shape automatic monitoring system of claim 8, wherein the process controller comprises: a processing unit electrically connected to the optical sensors and the processing device, and is adapted to calculate the shape of the plate Transmitting the shape of the plate to the process device, and controlling the process device according to the shape of the plate; a visualization interface electrically connected to the processing unit and adapted to receive and display the shape of the plate; and The alarm device is electrically connected to the processing unit, and the processing unit can control the alarm to send an alert signal when the deviation of any of the shape shapes from a reference plate shape exceeds a predetermined value. The steel strip shape automatic monitoring system of claim 8, further comprising a plurality of carriers, wherein the optical laser sensors are corresponding to the plurality of carriers, wherein each of the carriers comprises a carrier An upper plate, a side plate and a bottom plate, the upper plate and the bottom plate are respectively joined to two sides of the side plate, and the upper plate and the bottom plate In contrast, and when each of the optical laser sensor devices is disposed in the corresponding carrier, a leading edge of the upper plate and a leading edge of the bottom plate protrude from the optical laser sensor a light exiting surface, and the leading edge of the bottom plate protrudes from the front edge of the upper plate.