CN201503312U - On-line Monitoring System of Infrared Thermal Imaging Equipment Operation Status Based on Wireless Communication - Google Patents

Abstract

The utility model provides an online monitoring system for the operating status of infrared thermal imaging equipment, which includes: at least one image acquisition system (12) for collecting image data of the monitored equipment; at least one receiving controller (13) for Receive image data from the image acquisition system; and an online monitoring software system (14) for analyzing and monitoring the image data received through the receiving controller; characterized in that: wireless communication is used between the image acquisition system and the receiving controller Data transmission is carried out through optical fiber between the receiving controller and the online monitoring software system. The utility model separates equipment according to functional requirements, and divides equipment that can be designed into one into an image acquisition system and an image receiving and central control system. Wireless communication is used for data transmission between these two parts of equipment, which not only ensures the small size and light weight of the front-end image acquisition system, but also ensures the requirements of less wiring and simple construction between the two parts of equipment. In the receiving and control center The use of optical fiber for data transmission can ensure reliable long-distance transmission of video images and infrared images, ensuring that there is no distance limit between the monitored workshop and the main control room.

Description

On-line Monitoring System of Infrared Thermal Imaging Equipment Operation Status Based on Wireless Communication

technical field

The utility model relates to an online monitoring system for the operation status of infrared thermal imaging equipment, in particular to an online monitoring system for the operation status of infrared thermal imaging equipment based on wireless communication, which belongs to the field of infrared image monitoring and wireless data transmission.

Background technique

When the electrical equipment, mechanical equipment and rotary kiln of the factory are in operation, the parts and components of the equipment will have a certain temperature and temperature difference on the surface. If the equipment is in long-term operation, parts and components will age and deteriorate, or the furnace wall will become thinner, and its surface temperature will change, which will often cause potential safety hazards in equipment operation and bring losses to production. These changes are difficult and unrecognizable manually, and ordinary off-line infrared point temperature measurement methods cannot detect temperature changes. At present, there are portable infrared thermal imaging cameras on the market, and inspectors can also detect the surface temperature images of equipment with handheld portable infrared thermal imaging cameras, but this manual random sampling method is not suitable for practical application in industrial sites.

In addition, the existing on-line monitoring technology for the operation status of infrared thermal imaging equipment adopts a wired connection method, which requires wiring, which is inconvenient to install and has poor system scalability. Especially when the pan/tilt drives the CCD video camera and uncooled focal plane thermal imager integrated on it, it needs to rotate 0°～350° in the horizontal direction and 0°～±30° in the vertical direction frequently every day. When pitching and turning, the wires dragged by the pan/tilt are often entangled and sometimes twisted; in addition, the camera and the thermal imager transmit high-frequency video and infrared images; the connection between the camera and the thermal imager is a weak current wire, and It is a strong electric wire that connects the gimbal. Although the weak current conductors and strong current conductors can use shielded cables respectively, as long as the weak current conductors and strong current conductors are bundled in the same wire harness or placed in the same large cable, they will inevitably interfere with each other, thus affecting high-frequency video and Normal transmission of infrared images. On the other hand, due to the complex and different factory environments, it will be very difficult to connect infrared thermal imaging equipment for online monitoring by traditional laying of wired cables. The inconvenience of maintenance is unbearable for enterprises.

In addition, because there are many special equipment in various workshops of the factory, such as the surface temperature of kilns and various parts of special equipment, the connection parts of electrical equipment such as knife switches, switches, PTs, CTs, capacitors, reactors, and rectifier units It is necessary to inspect the surface temperature of equipment components in real time and regularly. It is also unrealistic to set up a fixed image monitoring system for each device that needs to be monitored. Therefore, it is also necessary to design a monitoring system that can monitor multiple special devices with only a small amount of infrared monitoring instruments.

Utility model content

Aiming at the problems existing in the prior art, the utility model provides an online monitoring system for the operation status of infrared thermal imaging equipment, which includes: at least one image acquisition system (12) for collecting image data of the monitored equipment; at least one The receiving controller (13) is used to receive image data from the image acquisition system; and the online monitoring software system (14) is used to analyze and monitor the image data received by the receiving controller; it is characterized in that: the image acquisition system Data transmission is carried out by wireless communication with the receiving controller, and data is transmitted by optical fiber between the receiving controller and the online monitoring software system.

Further, the image acquisition system (12) described in the utility model includes: a cloud platform (1), which is installed on the top or side of the monitored equipment as a positioning device for the image acquisition equipment; an uncooled focal plane thermal imager (2A), which is installed on the cloud platform, can display the infrared thermogram of the object as a pseudo-color image, and can analyze the surface temperature field of the object to measure the temperature of the object surface; CCD video camera (2B) , which is integrated with the uncooled focal plane thermal imager, installed on the cloud platform, and used to shoot the monitored object; the network video server (3), which is directly connected with the camera and the thermal imager, completes the image data Collect, and compress the collected video image data based on MPEG-4 or H.264, and then send the compressed data to the wireless router (4) at the sending end; the wireless router at the sending end (4A), which is equipped with a wireless network card , and connected with an external antenna (6A) to enhance the wireless signal; an external antenna (6A), which is connected to the wireless router (4A) at the sending end, for sending and receiving wireless data; a serial port gateway (5), which sends the wireless router at the sending end to The incoming control information is converted, and then sent to the pan/tilt through the RS485 interface to control the pan/tilt.

Further, the receiving controller (13) described in the utility model includes: a receiving end wireless router (4B), which receives the information sent by the sending end wireless router (4A) through radio waves; and divides the received information into two Road, one for the visible light video image collected by the compressed video camera, one for the infrared thermal image collected by the compressed uncooled focal plane thermal imager, and sent to two video decoders (7) respectively; The external antenna (6B) is used to send and receive wireless data; the video decoder (7) receives the data sent by the wireless router at the receiving end, restores the data format and decomposes it into three data forms: image, video and control signal; the digital signal at the sending end An optical transceiver (8A), which receives the information sent by the wireless router at the receiving end and the two-way video decoder.

Further, the on-line monitoring software system (14) described in the utility model comprises: digital optical transceiver (8B) at the receiving end, which corresponds to the digital optical transceiver at the sending end, on the one hand, receives the information sent by the digital optical transceiver at the sending end; Aspects, the received information is divided into two paths, one path is sent to the computer; the other path is sent to the embedded hard disk video recorder; the computer (9) is placed in the main control room, and is used for remotely controlling the working mode of the image acquisition system, and for passing through The thermal imaging images on the surface of special equipment transmitted by the data transmission interface are sorted out, and the temperature data of characteristic points are obtained, and compared and analyzed with the thermal imaging images of each special equipment under normal working conditions and the characteristic point temperature data under normal working conditions; if If the abnormality of the thermal imaging image exceeds the allowable range of the setting, or the change of the temperature data of the characteristic point exceeds the allowable range of the setting, the system will immediately send out an alarm message; Image data of the monitored area;

The online monitoring system for the operation status of infrared thermal imaging equipment for wireless communication of the utility model uses infrared thermal imaging technology, wireless communication technology and image processing technology to realize "automatic, unattended" safe operation monitoring. And pitch to monitor the equipment, so that one monitoring instrument can monitor multiple special equipment at the same time, thus saving the cost of the system. The system transmits video and infrared images by wireless communication, providing a reliable, efficient, and low-cost transmission link; due to the wireless transmission, weak current wires and strong current wires do not need to be bundled in the same wire harness or placed in the same large cable Therefore, there will be no interference between them, so that the normal transmission of high-frequency video and infrared images can be guaranteed. Adopting wireless transmission avoids unnecessary troubles caused by integrated wiring and reduces the complexity of system erection. The optical fiber is used for data transmission between the receiving controller and the control center, which can ensure reliable long-distance transmission of video images and infrared images, and ensures that the distance between the monitored workshop and the main control room is not limited. It meets the requirements of convenient installation and maintenance and low failure rate.

Description of drawings

Fig. 1 is the functional block diagram of the image acquisition system of the present utility model.

Fig. 2 is a functional block diagram of the receiving controller of the present invention.

Fig. 3 is a functional block diagram of the online monitoring software system of the present invention.

Fig. 4 is an overall structural diagram of the wireless communication-based online monitoring system for the operating status of infrared thermal imaging equipment of the present invention.

Fig. 5 is a specific application example diagram of the utility model in the electrolytic aluminum factory workshop.

Fig. 6 is the interface diagram of the online detection software of the specific application example of the utility model in the electrolytic aluminum factory workshop.

The best embodiment of the utility model

The wireless communication-based online monitoring system for the operation of infrared thermal imaging equipment of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is the functional block diagram of the image acquisition system of the present utility model, and this system comprises: cloud platform 1, it is installed on the top or the side of monitored special equipment, as the positioning device of image acquisition; If it is controlled by a serial port gateway, the gimbal selects the corresponding positioning point according to the program instructions. It not only plays the role of supporting and installing the integrated camera and thermal imager, but more importantly, expands the field of view of the camera and thermal imager. Can do 0°～350°rotation in the horizontal direction and 0°～±30° pitching in the vertical direction; so in a sense it plays the role of changing one camera and thermal imager into multiple cameras and thermal imagers Function: Uncooled focal plane thermal imager 2A, referred to as thermal imager, is installed on the gimbal, and can display the infrared thermal spectrum of the object as a high-definition, high-sensitivity pseudo-color image, and can meet the requirements for Analysis of object surface temperature field, accurate non-contact temperature measurement and other requirements. There are a variety of alarm status settings, real-time color and alarm signal output; a variety of connection interfaces can be used independently, and there is an Ethernet interface; CCD video camera 2B, referred to as the camera, is integrated with the uncooled focal plane thermal imager , installed on the cloud platform, for real-time, uninterrupted shooting of the monitored object; network video server (DVS, digital video server) 3, also known as digital video encoder, is a set of video acquisition, real-time compression, network transmission (wired or wireless) and other functions as one of the embedded devices. It is directly connected with the camera and the thermal imager to complete the collection of image data, and provide the video image data compression or decompression function based on MPEG-4 or H.264, and then send the compressed data to the wireless router at the sending end; The wireless router 4A at the sending end is configured with a wireless network card, and the wireless signal is enhanced through an external antenna connected to the wireless router to achieve the purpose of extending the transmission distance and solve the problem of inconvenient wiring for the monitored object. It is usually placed near the monitored object; it adopts a wireless router, no wiring is required, it is easy to install, and the system has good scalability; the wireless router at the sending end sends information from the workshop of the monitored object; the serial port gateway 5 is used to connect the sending end wireless The control information sent by the router is converted, and then sent to the pan/tilt through the RS485 interface to control the operation of the pan/tilt. The antenna 6A is connected to the wireless router 4A at the sending end, and is used for sending and receiving wireless data.

Fig. 2 is a functional block diagram of the receiving controller of the present invention. The receiving controller specifically includes: an antenna 6B for sending and receiving wireless data; a receiving end wireless router 4B, which is usually placed outside the workshop of the monitored object and corresponds to the sending end wireless router 4A. The end wireless router sends information from the power supply workshop; on the other hand, the received information is divided into two channels, one is the visible light video image collected by the compressed video camera, and the other is the compressed uncooled focal plane thermal image The infrared thermal images collected by the instrument are sent to two video decoders 7 respectively; the video decoder 7 is used to receive the data sent by the wireless router at the receiving end, restore the data format and decompose it into three parts: image, video and control signal A data format; digital optical transceiver 8A at the sending end, which is an all-digital non-compressed and non-destructive transmission method. The electromagnetic environment of factories and mining enterprises is generally harsh, and conventional coaxial cables transmit video, which sometimes causes interference; digital optical transceivers are used, which have strong anti-electromagnetic interference capabilities and can reliably transmit video over long distances. It receives the information sent by the receiving end wireless router and two video decoders.

Fig. 3 is a functional block diagram of the online monitoring software system of the present invention. The system includes a digital optical transceiver 8B at the receiving end, which corresponds to the digital optical transceiver at the sending end. On the one hand, it receives the information sent by the digital optical transceiver at the sending end; Send to embedded hard disk video recorder; Embedded hard disk video recorder (Digital Video Recorder is called for short DVR) 10, namely hard disk video recorder, is used for storing the image data of monitored equipment. The computer 9, also called the upper computer here, is placed in the main control room. When the system is working, the staff can remotely control and set the forward and backward movement modes of the robot through the upper computer in the main control room of the computer room. It can control and set the rotation mode of the image acquisition platform, and can also control and set the way of taking pictures, collecting and uploading infrared images; the monitoring software system, which is installed in the host computer in the main control room, constitutes the image of the host computer The processing system organizes the thermal imaging images on the surface of special equipment transmitted through the data transmission interface, obtains the temperature data of characteristic points, and compares them with the thermal imaging images of each special equipment under normal working conditions and the temperature data of characteristic points under normal working conditions. Comparison and analysis; if the abnormal condition of the thermal imaging image exceeds the set allowable range, or the change of the temperature data of the characteristic point exceeds the set allowable range, the system will immediately send out an alarm message; the normal working mode of this monitoring system is set by the host computer At the detection time, the system runs automatically, and generates reports and temperature curves after detecting the temperature of the set detection points once. The staff can also query the past detection records, compare with the current detection report, and find abnormalities. The monitoring software system includes an image acquisition and trimming part, an image feature point extraction part, an image database part, an image feature analysis part, an alarm part and a historical data query part. The online monitoring software system integrates all the functions of the screen splitter, video switcher, controller, video server, and remote transmission system. It can be connected to the alarm signal to realize the linkage function of alarm detection. It can also control the pan/tilt and lens through the decoder. It can be connected to the local area network by using the TCP/IP protocol, so that the staff can connect through the network to realize the monitoring and video recording of the monitored area. It is suitable for occasions of long-term video recording, remote monitoring and control of images.

Fig. 4 is an overall structural diagram of the wireless communication-based online monitoring system for the operating status of infrared thermal imaging equipment of the present invention. The system includes: there may be 1-6 image acquisition systems, there may be 1-6 receiving controllers, and an online monitoring software system, which is characterized in that data transmission is carried out by wireless communication between the image acquisition system and the receiving controller, Data is transmitted between the receiving controller and the online monitoring software system through optical fibers.

Fig. 5 is an application example of the utility model in the power supply workshop of the electrolytic aluminum plant of Chalco Guizhou Branch. There are two rows of electrical equipment in the first power supply workshop, one row has five transformers, and the other has five capacitor banks. These electrical equipment have many connection points and components. Due to the current passing through the equipment during operation, these connection points and components will heat up. If the connection is not tight or the components are aging, it will lead to unstable operation, and their surface temperature will change compared with normal conditions. General technical means for these situations It is difficult to find, and it is easy to cause hidden dangers in operation.

Faced with such a demand, a metal pole can be erected between the two rows of electrical equipment, an image acquisition system can be installed on it, and the two rows of electrical equipment can be monitored by using the pan-tilt to rotate up and down, left and right; An image acquisition system is installed on the top of the building next to the row of equipment. It mainly depends on the needs of the actual situation on site. The receiving controller of each image acquisition system can be installed on the wall of the building far away from the site, and the required distance should be within 150 meters. It is best not to be blocked by other objects between the transmitting and receiving antennas. A fiber optic cable can be laid between the receiving controller and the monitoring room, or the existing fiber optic cable can be used to connect to the host computer and the hard disk video recorder through the fiber optic cable of the network switch.

Fig. 6 is the operating interface diagram of the online monitoring software of the specific application example of the present invention, under this operating interface, can carry out system parameter setting, each monitoring point of the equipment that needs to be monitored is coded in order, and their normal working temperature Values are saved to the database together, and this work is done only once until a change occurs. Then use the feature point positioning and acquisition subsystem of the online monitoring software system to position the position of each monitoring point and take infrared image photos, and save these data in the database. This is only done once until there is a change time stop. After the above process, the online monitoring software system has achieved real-time online monitoring of the equipment. Every day, the image acquisition system starts to work according to the set time. Since the pan/tilt has memorized the positions of each monitoring point, it can start alignment, focusing, photographing and image uploading from the first monitoring point in sequence, all the way to the device’s The last monitoring point, and repeat the work accordingly. When the image acquisition system monitors the next monitoring point, the online monitoring software system analyzes the uploaded monitoring point image and temperature data and saves it in the database, and compares it with the standard image data and temperature data of the monitoring point. If there is a deviation, an alarm is required, and the alarm information is also saved in the database. In order to prevent the long-term operation of the pan/tilt during rotation, the mechanical error will cause the monitoring point to shift on the image screen, or even the monitoring point to shift out of the image screen, the system provides the image automatic correction and alignment function. If the monitoring point deviates to a certain extent on the image screen, the automatic image correction and alignment function will automatically start to adjust and correct the angle and position of the pan/tilt to ensure that the monitoring point is always in the center of the image screen. In order to enable those skilled in the art to understand the utility model more intuitively, the manual monitoring interface, automatic detection interface, field test interface and detection report interface diagrams of the online monitoring software are shown in FIG. 6 .

The infrared image on-line monitoring system of equipment operation status constituted in this way is suitable for various complex application environments. First of all, the image acquisition system can be installed at any position in the equipment or equipment group according to the needs, and can be fixed or arranged on the slide rail to move; the receiving controller is fixedly arranged on the monitored equipment or a building other than the monitored equipment group, it The physical distance from the image acquisition system can reach up to 150 meters, using wireless communication technology to transmit various data; the host computer and image processing system can be arranged in the monitoring room of the factory or workshop, and the data communication is carried out through optical fiber, and the distance can reach several kilometers to dozens of kilometers. A set of infrared image online monitoring system for equipment operation status can include 1-6 image acquisition systems, and can use a host computer and a set of online monitoring software system. Infrared thermal imaging makes the human eye unable to directly see the surface temperature distribution, and becomes a visible thermal image representing the target surface temperature distribution. The CCD video camera and uncooled focal plane thermal imager placed on the pan/tilt can shoot videos and infrared thermal images of multiple monitored points in real time; the sending end and the receiving end are connected through a wireless router, which is convenient for factory wiring. , without wiring in the middle; at the same time, in the harsh electromagnetic environment of factories and mines, the use of digital optical transceivers can reliably transmit video images and infrared images over long distances, and the use of infrared thermal imaging lenses can be fixedly installed above equipment or equipment groups. It is best that one infrared thermal imaging lens can monitor multiple devices, which can save investment. The online monitoring software system can automatically judge the failure of equipment and components. Realize the online monitoring system of equipment operation status with "automatic, unattended" function.

Although the present invention has been described with reference to preferred embodiments, the present invention is not limited to the above embodiments, and those skilled in the art can make various modifications and changes to the above embodiments in view of the above teachings. These modifications and changes also fall within the protection scope of the claims of the present utility model.

Claims (4)

1. An infrared thermal imaging equipment operating condition online monitoring system, which includes: at least one image acquisition system (12), used to collect image data of the monitored equipment; at least one receiving controller (13), used to receive images from The image data of acquisition system; And online monitoring software system (14), is used for analyzing and monitoring the image data received by receiving controller; It is characterized in that: Data transmission is carried out between the image acquisition system and the receiving controller through wireless communication, and the data is transmitted between the receiving controller and the online monitoring software system through optical fiber. 2. The infrared thermal imaging equipment operating condition online monitoring system according to claim 1, characterized in that the image acquisition system (12) comprises: A cloud platform (1), which is installed on the top or side of the monitored equipment, as a positioning device for the image acquisition equipment; Uncooled focal plane thermal imaging camera (2A), which is installed on the gimbal, can display the infrared thermogram of the object as a pseudo-color image, and can analyze the temperature field of the object surface to measure the temperature of the object surface ; CCD video camera (2B), which is integrated with the uncooled focal plane thermal imager, installed on the pan-tilt, for shooting the monitored object; Network video server (3), it is directly connected with video camera and thermal imager, completes the collection of image data, and based on MPEG-4 or H.264 the video image data of collection is compressed, then sends the compressed data to In the wireless router (4A) at the sending end; The wireless router (4A) at the sending end is equipped with a wireless network card and connected with an external antenna (6A) to enhance the wireless signal; Antenna (6A), which is connected to the sending end wireless router (4A), for sending and receiving wireless data; A serial port gateway (5), which converts the control information sent by the wireless router at the sending end, and then sends it to the cloud platform through the RS485 interface to control the cloud platform. 3. The infrared thermal imaging equipment operating condition online monitoring system according to claim 1, characterized in that the receiving controller (13) comprises: The receiving end wireless router (4B), which receives the information sent by the sending end wireless router (4A) through radio waves; and divides the received information into two paths, one path is the visible light video image collected by the compressed video camera, and the other path Infrared thermal imaging images collected by the compressed uncooled focal plane thermal imager are sent to two video decoders (7) respectively; Antenna (6B), used for sending and receiving wireless data; The video decoder (7) receives the data sent by the wireless router at the receiving end, restores the data format and decomposes it into three data forms of image, video and control signal; The digital optical transceiver (8A) at the sending end receives information from the wireless router at the receiving end and two video decoders. 4. The infrared thermal imaging equipment operating condition online monitoring system according to claim 1, characterized in that the online monitoring software system (14) comprises: The digital optical transceiver at the receiving end (8B) corresponds to the digital optical transceiver at the sending end. On the one hand, it receives the information sent by the digital optical transceiver at the sending end; to the embedded DVR; The computer (9), placed in the main control room, is used to remotely control the image acquisition system, organize the surface thermal imaging images of the monitored equipment transmitted through the data transmission interface, obtain characteristic point temperature data, and communicate with each monitored equipment. Compare and analyze the thermal imaging image under the normal working condition of the monitoring equipment and the characteristic point temperature data under the normal working condition; if the abnormal condition of the thermal imaging image exceeds the set allowable range, or the change of the characteristic point temperature data exceeds the set allowable range, the system immediately sends out an alarm message; Hard disk video recorder (Digital Video Recorder is called for short DVR) (10), and it is used for storing the image data of monitored area.

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