TWI554739B - Image capture system and defect detection method for a hot object - Google Patents

Description

Thermal object image capture system and thermal object detection method

The invention relates to a hot object image capturing system and a hot object detecting method, in particular to a hot object image capturing system and a hot object detecting method using a photoelectric detecting device.

In steel production lines, testing equipment is usually installed to check if the product is qualified. For example, the image capture device is used to capture the surface image of the product, and the image processing technology is used to determine whether the surface of the product is flawed. However, in order to ensure that the inspection operation can proceed smoothly, it is often necessary to know when the product arrives at the installation location of the detection device and how many sampling frequencies are used for the inspection operation. For high-temperature steels, it is a common method to use the brightness of steel to detect the position of steel. For example, a hot metal detector (HOT METAL DETECTOR) is used to detect the position of the steel. For another example, the production line image is captured and the image brightness is analyzed to obtain the steel product position and moving speed, and the sampling frequency is derived. However, the hot metal detector cannot be used alone as a steel product to capture image touches through the external fixed frequency before the image capturing device. The conventional image brightness analysis method cannot detect long objects moving in one direction under short-distance detection.

Therefore, there is a need for a thermal object image capture system and a thermal object detection method to solve the above problems.

One aspect of the present invention provides a method for detecting a thermal object image capturing system and a thermal object detecting device, which uses a photodetecting device to detect a steel product position and transmits a sampling through an intermediary device (for example, a micro central processing unit). Signal to facilitate the inspection operation.

According to an embodiment of the invention, the thermal object image capturing system comprises a plurality of image capturing devices, a plurality of computers, a photodetecting device and an intermediary device. The image capturing device is disposed on the hot object to capture a plurality of surface images of the hot object. The computer is electrically connected to the image capturing device to control the image capturing device according to the plurality of control signals. The photodetecting device is configured to detect the hot object to determine whether the hot object is close to the image capturing device, and when the photo detecting device detects the hot object, the detecting signal is sent. The intermediary device is electrically connected to the photodetection device and the computer to transmit the control signal to the computer according to the detection signal.

According to another embodiment of the present invention, in the method for detecting a hot object, the photodetecting device is first used to detect the hot object to determine whether the hot object is close to the plurality of image capturing devices. Then, when the photodetection device detects the hot object, the intermediary device is used to transmit a plurality of control signals to the plurality of computers to control the image capturing device and simultaneously capture the hot object through the computer. a plurality of partial surface images. Then, a computer is used to process a part of the surface image of the hot object to obtain the surface information of the hot object.

100‧‧‧Hot object image capture system

110‧‧‧Image capture device

120‧‧‧ computer

130‧‧‧Photodetection device

132‧‧‧Cooling protection tube

132a‧‧‧ Inlet

132b‧‧‧ outer tube

132c‧‧‧Closed weldment

132d‧‧‧Inner tube

132e‧‧‧ water outlet

134‧‧‧ Subject

134a‧‧‧ inner management

134b‧‧‧External joints

134c‧‧‧Internal connection

134d‧‧‧Insulated body

134e‧‧‧Transparent lenses

134f‧‧‧Insulated cover

136‧‧‧ tee

136a‧‧‧ signal exit end

136b‧‧‧Intake Department

136c‧‧‧Connecting Department

140‧‧‧Intermediary device

142‧‧‧Micro Central Processing Unit

144‧‧‧Replicator

200‧‧‧Hot object detection method

210-230‧‧‧Steps

ACH1-3‧‧‧ Groove Department

DB‧‧‧ combination part

GB‧‧‧ body

HO‧‧‧Hot items

LD‧‧‧Photoelectric diode

OP‧‧‧ combination hole

TB‧‧‧ combination part

SB‧‧‧ body

SCW1-5‧‧‧ threaded part

The above and other objects, features, and advantages of the present invention will become more apparent and understood. A schematic diagram of the architecture of the thermal object image capturing system of the embodiment of the invention.

FIG. 2 is a schematic flow chart of a method for detecting a hot object 瑕疵 according to an embodiment of the invention.

3 is a schematic structural view of a cooling protection tube of a photodetecting device according to an embodiment of the invention.

4 is a schematic structural view of a main body of a photodetecting device according to an embodiment of the invention.

FIG. 5 is a schematic structural view of a tee of a photodetecting device according to an embodiment of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a thermal object image capturing system 100 according to an embodiment of the invention. The thermal object image capturing system 100 includes a plurality of image capturing devices 110, a plurality of computers 120, a photodetecting device 130, and an intermediary device 140. The image capturing device 110 is configured to capture a surface image of the hot object HO. In this embodiment, the hot object The piece HO is the steel embryo on the production line, which is moved along the production line by the conveying device, and the moving direction is perpendicular to the drawing surface. The image capturing device 110 is disposed around the hot object HO to capture an image for each surface portion of the thermal object HO. In the embodiment, the image capturing device 110 can be, for example, a camera, but the embodiment of the present invention is not limited thereto.

The photodetection device 130 is used to detect the hot object HO to judge Whether the heat-insulating object HO is close. In the embodiment, the photodetection device 130 is a photodiode, which is disposed near the image capturing device 110. Since the hot object HO emits a strong light, when the hot object HO approaches the image capturing device 110, the photo detecting device 130 detects the light of the hot object HO and sends a detection signal to the interposer 140.

The mediation device 140 is electrically connected to the photodetection device 130 and Between the computers 120, the control signals are transmitted to all the computers 120 according to the detection signals transmitted by the photodetection device 130, so that the computer 120 controls the image capturing device 110 to capture the surface images of the thermal objects HO. As shown in FIG. 1, the mediation device 140 includes a micro central processor 142 and a replicator 144. The micro central processing unit 142 is configured to generate a fixed frequency control signal according to the detection signal of the photodetection device 130, and the replicator 144 is configured to copy the control signals and transmit the control signals to the computers 120 respectively. The computer 120 is caused to control the image capturing device 110 according to the control signal.

In the present embodiment, the control generated by the micro central processing unit 142 The signal is a pulse signal with a frequency of 6 Hz. That is, when the computer 120 receives the pulse signal, the image capturing device 110 is controlled to capture the surface image of the hot object HO at a frequency of 6 times per second. Other embodiments of the invention The micro central processing unit 142 can also generate pulse signals of different frequencies to control the image capturing device 110.

Please refer to FIG. 2, which illustrates an embodiment of the present invention. A schematic diagram of the flow of the hot object detection method 200. The hot object detection method 200 of the present embodiment is applied to the thermal object image capturing system 100 for surface flaw detection of the hot object HO. In the hot object detection method 200, step 210 is first performed to detect the hot object HO by using the photodetection device 130 to determine whether the hot object HO is close to the image capturing device 110. Then, step 220 is performed to transmit the control signal to the 120 computer by using the mediation device 140 when the photodetection device detects the hot object HO, and the image capturing device 110 is controlled by the computer 120 to simultaneously capture the hot object HO. Surface image of each part.

In the present embodiment, since the hot object HO has a high brightness, Therefore, when the hot object HO approaches the photodetection device 130, the photodetection device 130 generates a detection signal correspondingly and transmits it to the interposer 140. The micro central processing unit 142 of the mediation device 140 can receive the detection signal of the detection device 130 and correspondingly generate a pulse signal having a fixed frequency, and the replicator 144 copies the pulse signal and transmits it to each computer 120. When the computer 120 receives the pulse signal, the image capturing device 110 controls the image capturing operation according to the frequency of the pulse signal. For example, when the frequency of the pulse signal is 6 Hz, the image capturing device 110 captures the image of the hot object HO at a frequency of 6 times per second and transmits it to the corresponding computer 120.

After step 220, step 230 is followed to process the surface images, such as image binarization, using computer 120 to obtain heat. The surface of the object HO is 瑕疵 information. After obtaining the surface information of the hot object HO, the operator can perform appropriate processing according to the surface information, such as adjusting the process parameters.

In addition, the photodetection device 130 of the embodiment includes a plurality of The protection of the layer kit protects the internal photodiode from damage by external moisture and oil and provides a cooling effect. The configuration of the photodetecting device 130 will be described in detail below.

Please refer to FIG. 3, FIG. 4 and FIG. 5, which respectively show the root A schematic diagram of the structure of the cooling protection tube 132, the main body 134 and the tee tube 136 of the photodetecting device 130 according to the embodiment of the present invention. As shown in FIG. 3, the cooling protection tube 132 has a water inlet 132a, an outer layer tube 132b, a closed weldment 132c, an inner tube 132d, and a water outlet 132e. The outer tube 132b, the closed weldment 132c and the inner tube 132d form a tubular accommodation space for accommodating a cooling liquid such as water. The water inlet 132a is used for injecting water into the accommodating space, and the water outlet 132e is for discharging water in the accommodating space, so that the cooling protection tube 132 can provide the effect of cooling protection.

As shown in FIG. 4, the main body 134 includes an inner tube 134a and an outer title. The connector 134b, the inner connector 134c, the insulating base 134d, the photodiode LD, the transparent lens 134e, and the insulating seat cover 134f. In the present embodiment, the inner tube 134a, the inner connecting member 134c, the insulating base 134d, the photodiode LD, the transparent lens 134e, and the insulating seat cover 134f are sequentially assembled and passed through the cooling protection tube 132. After the foregoing components are disposed in the cooling protection tube 132, the outer connecting member 134b is re-locked in the inner tube 134a and the cooling protection tube 132, wherein the outer connecting member 134b has a smaller diameter portion SCW1 The threaded portion SCW2 having a larger diameter of the outer engaging member 134b is locked to the threaded portion of the inner tube 132d. Since the thread portion SCW2 has a large diameter, when the thread portion SCW1 is completely locked into the inner tube 134a, the thread portion SCW2 abuts against the annular side wall of the inner tube 134a to close the inner tube end. After the locking is completed, the seat GB of the outer joint 134b is located outside the cooling protection tube 132, and one end of the inner tube 132d of the cooling protection tube 132 is closed.

The inner joint 134c has a threaded portion SCW3 and a combination Part TB, wherein the thread portion SCW3 has a smaller diameter and the combined portion TB has a larger diameter. The thread portion SCW3 is used to lock in the inner tube 134a to connect the inner joint 134c and the inner tube 134a. Since the combined portion TB has a larger diameter, when the thread portion SCW3 is completely locked into the inner tube 134a, the combined portion TB abuts against the annular side wall (not shown) of the inner tube 134a to close the inner tube. Ends.

Insulating housing 134d has a threaded portion SCW4 and a combination Part DB, in which the thread portion SCW4 has a smaller diameter and the combined portion DB has a larger diameter. The thread portion SCW4 is for locking in the combined portion TB of the inner joint 134c to connect the insulating seat 134d and the inner joint 134c. Since the combined portion DB has a larger diameter, when the thread portion SCW4 is completely locked to the combined portion TB, the combined portion DB is in direct contact with the combined portion TB to close the end of the inner joint 134c.

The photodiode LD is disposed in the combined portion DB of the insulating base 134d for detecting the hot object. In this embodiment, absolutely The edge body 134d is made of an insulating material to accommodate the photodiode LD.

The insulating seat cover 134f has a screw portion SCW5 and a seat body SB. The screw portion SCW5 is disposed in the cooling protection tube 132 to protect the photodiode LD by placing a transparent lens 134e (for example, a glass piece) in front of the photodiode LD, wherein the insulating seat cover 134f and the insulating seat body 134d is a tubular structure, and the diameter of the screw portion SCW5 is matched with the inner tube 132d of the cooling protection tube 132, so the screw portion SCW5 can be locked into the cooling protection tube 132, and the transparent lens 134e is fixed to the protection photoelectric two. The front of the polar body LD. The seat body SB has a larger diameter than the screw portion SCW5. When the screw portion SCW5 is locked to the cooling protection tube 132, the seat body SB is located outside the combined portion DB, and one end of the inner tube 132d of the cooling protection tube 132 is cooled. Closed. That is, both ends of the inner tube 132d of the cooling protection tube 132 are respectively closed by the seat body GB of the outer joint member 134b and the seat body SB of the insulating seat cover 134f.

From the above description and the disclosure of FIG. 4, the inner tube 134a and the outer tube are known. The connecting member 134b, the inner connecting member 134c and the insulating seat 134d are all tubular structures. When the components are sequentially locked and combined, a gas flow path is formed inside. Further, groove portions ACH1-ACH3 are formed on the joint member 134b and the inner joint member 134c, respectively. When the above components are sequentially locked and combined, the groove portions ACH1-ACH3 provide an external gas flow path.

For example, when the gas enters from the combined hole OP of the outer joint 134b After entering the main body 134, it flows along the internal gas flow path to the combined portion DB of the insulating seat 134d. Then, the pores of the front end of the combined portion DB are recirculated into the groove portion ACH3. Since the diameter of the inner tube 134a is smaller than the inner position The diameter of the combined portion TB of the joint 134c and the diameter of the threaded portion SCW2 of the outer joint 134b, so that the gas in the groove portion ACH3 can flow into the groove portion ACH1 along the surface of the inner tube 134a, and then pass through the groove. The groove portion ACH2 flows to the outside of the photodetecting device 130.

In other embodiments of the invention, the snail of the insulating base 134d The tooth portion SCW4 may not be completely locked into the combined portion TB, so that the gas in the internal gas flow passage may also be returned to the external gas flow passage by the air gap of the screw portion SCW4.

As shown in FIG. 5, the tee 136 has a signal outlet end. 136a, the inlet portion 136b, and the connecting portion 136c, wherein the connecting portion 136c is coupled to the combined hole OP of the outer engaging member 134b. The intake portion 136b is for external air input to allow external air to pass through the tee 136 into the internal gas flow path of the body 134. The signal output end portion 136a is configured to allow the signal line of the photodiode LD to pass through to enable the signal of the photodiode LD to be transmitted outside the photodetecting device 130. In this embodiment, the signal line of the photodiode LD is disposed in the internal gas flow path of the body 134 and the signal exit end 136a and the connection portion 136c of the tee 136, but the embodiment of the present invention is not Limited to this.

In addition, it is worth mentioning that the cooling protection tube of this embodiment 132. The inner tube 134a, the outer connecting member 134b and the inner connecting member 134c are made of metal for processing and heat dissipation.

It can be seen from the above description that the hot object image of the embodiment of the present invention The capturing system 100 and the hot object detecting method 200 use the photodetecting device 130 to detect the position of the hot object and send it through the mediation device 140. Send sampling signals, which can be beneficial to the inspection operation. Next, the thermal object image capturing system 100 of the embodiment of the present invention uses the photodetecting device 130 for detection. The thermal object image capturing system 100 of the embodiment of the present invention can be used in the photodetecting device 130 to reduce the temperature of the photodetecting device 130 by using water cooling and air cooling, and the glass is used to protect the internal photodiode LD. It is applied to high temperature work sites for detection.

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.

100‧‧‧Hot object image capture system

110‧‧‧Image capture device

120‧‧‧ computer

130‧‧‧Photodetection device

140‧‧‧Intermediary device

142‧‧‧Micro Central Processing Unit

144‧‧‧Replicator

HO‧‧‧Hot items

Claims (6)

A thermal object image capturing system for capturing a surface image of a thermal object, comprising: a plurality of image capturing devices, the hot object is ringed to capture a plurality of surface images of the hot object; and the plurality of computers Electrically connecting to the image capturing devices to control the image capturing devices according to the plurality of control signals; a photoelectric detecting device for detecting the hot objects to determine whether the hot objects are close to the An image capture device, wherein when the photodetection device detects the hot object, a detection signal is sent; and an intermediary device is electrically connected to the photodetection device and the computer to detect the The signal detecting device transmits the control signals to the computers; wherein the photodetecting device comprises: a cooling protection tube having a water outlet, a water inlet and an accommodating space; and a main body passing through the cooling protection tube The method includes an inner tube having a first inner gas flow passage, and an inner connecting member coupled to the inner tube, wherein the inner connecting member has a second inner gas flow passage and a first outer air passage a flow path, the second internal gas flow path is connected to the first internal gas flow path; an outer connecting member is connected to the inner tube, wherein the outer connecting member has a third inner gas flow path and a second outer gas a flow passage, the third internal gas flow passage is connected to the first internal gas flow passage; a body connected to the inner connecting member, wherein the diameter of the seat body is smaller than a diameter of the inner connecting member, so that the second inner gas flow path and the first outer gas flow path are in the seat body and the inner connecting member The connection is connected; and a photodetecting chip is disposed on the body. The hot object image capturing system of item 1 of the claim, wherein each of the control signals is a pulse signal. The hot object image capturing system of claim 2, wherein when the mediation device receives the detection signal, transmitting the control signals to the computers at an image capturing frequency to capture the image The device captures an image according to the image capturing frequency. The hot object image capturing system of claim 3, wherein the image capturing frequency is 6 Hz. The hot object image capturing system of claim 1, wherein the inner tube has a first end portion and a second end portion, the inner connecting member is connected to the first end portion, and the outer connecting member is connected To the second end. The thermal object image capturing system of claim 5, wherein the system is composed of a thermally insulating material.