A radar detection system and method in a high temperature environment

Abstract

In the field of industrial high-temperature detection technology, the present invention provides a radar detection system and method for a high-temperature environment. The upper cavity and the lower cavity of the radar sleeve of the system are separated by a flange. The upper antenna of the horn antenna is cylindrical, and the lower antenna is horn-shaped. A spherical universal joint is provided at the connection between the upper antenna and the lower antenna. An antenna protective suit is provided on the lower antenna, and the antenna protective suit is made of a high-temperature resistant flexible material. By controlling the moving distance of the telescopic rods of the two servo electric cylinders, the moving trajectory of the end of the horn antenna can be precisely controlled to perform quasi-real-time synchronous measurement of the "material surface + temperature".

Description

Technical Field

[0001] The present invention relates to the field of industrial high-temperature detection, and in particular to a radar detection system and method in a high-temperature environment. Background Art

[0002] In recent years, radar detection technology has been widely used to measure material surface information in industrial high-temperature environments, generally between 200°C and 300°C. Radar technology can accurately describe the height of each point on the discharge surface under harsh conditions such as darkness, high temperatures, and high dust levels. This technology accurately reflects the shape of the material surface in high-temperature areas and enables visualization of material surface information within the furnace. For example, in the steel industry, blast furnace production is a critical step in steelmaking. Using radar detection technology to measure the material surface shape during blast furnace production can improve production efficiency.

[0003] Since a fixed radar can only measure distance information at a fixed point, a mechanical device can be used to control the radar to measure information at multiple points for surface fitting. However, due to the harsh high-temperature environment, high-temperature airflow, dust, etc. can easily have an adverse effect on the radar during operation, resulting in large deviations in the radar scanning data and even damage to the radar system.

[0004] Chinese invention patent 201710580260.4, "A Method for Detecting Blast Furnace Charge Levels Combining Distance and Temperature Measurement," installs a radiometer on a blast furnace radar measuring device. While the radar measures distance in a specific radial direction within the blast furnace, the radiometer measures the temperature in the same direction. However, this method only uses the radar antenna to fix the radiometer and drive its swing; it cannot transmit or receive data through the radar antenna.

[0005] Chinese invention patent: 201210404903.7, "A new mechanical scanning radar device for measuring the shape of blast furnace charge surface", provides a blast furnace radar device that can achieve three-dimensional mechanical scanning. However, it mainly uses a connecting rod mechanism composed of a motor, a special-shaped hinge, a sliding sleeve, a screw, etc. to achieve the movement of the radar in a certain direction. The device has a complex structure and is difficult to implement.

[0006] Chinese invention patent: 200920014534.4, "A radar measuring device for blast furnace material surface shape", uses a universal spherical sealing device to measure the material surface shape in two dimensions. Its structure is simple, but the antenna is directly exposed to the harsh environment of the blast furnace without any protective measures.

[0007] Chinese invention patent: 201520351092.8, "Anti-corrosion antenna of radar level meter and radar level meter", adds a protective coat to the horn antenna, but it is mainly used for anti-corrosion of the antenna and cannot be quickly disassembled.

[0008] Chinese invention patent: 201420853174.8, "A radar scanning device capable of real-time monitoring of changes in blast furnace material surface", uses a radar scanning device that swings left and right around a universal joint, but it can only reciprocate in a fixed straight line and cannot perform 3D scanning of the material surface at any angle.

[0009] In summary, the existing technology has the following problems:

[0010] 1) The radar antenna is used to fix the radiometer and drive the radiometer to swing, but the radar antenna cannot be used to transmit and receive the radiometer.

[0011] 2) The structure for realizing the rotation of the radar is complex.

[0012] 3) The protective cover of the horn antenna is mainly used to protect the antenna from corrosion and cannot withstand high temperatures, so it cannot be quickly disassembled.

[0013] 4) The scanning device can only move back and forth in a straight line and cannot scan the 3D material surface at any angle. Summary of the Invention

[0014] To solve the above problems, a radar detection system and method for high temperature environments have been specially designed to ensure that the radar can operate stably and long-term under various harsh working conditions, thereby obtaining accurate blast furnace charge level data and extending the service life of the radar. Specifically, the system and method include:

[0015] A radar detection system for a high temperature environment comprises a radar sleeve upper cavity body that is sealed and a radar sleeve lower cavity body that is installed at the bottom of the radar sleeve upper cavity body;

[0016] And, a horn antenna, the upper cavity of the radar sleeve and the lower cavity of the radar sleeve are separated by a flange, the horn antenna includes an upper antenna and a lower antenna that are integrally arranged, the upper antenna is a columnar arrangement, the lower antenna is a horn-shaped arrangement, and a spherical universal joint is provided at the connection between the upper antenna and the lower antenna, wherein the spherical universal joint is arranged in the upper cavity of the radar sleeve, the lower antenna is installed in the lower cavity of the radar sleeve through the through hole in the middle of the flange, and an antenna protective clothing is provided on the lower antenna, and the antenna protective clothing is made of a high-temperature resistant flexible material;

[0017] and a radar unit and a thermal radiometer, wherein the radar unit is connected to the horn antenna via an H channel of a microwave channel, and the thermal radiometer is connected to the horn antenna via a V channel of the microwave channel;

[0018] and a nitrogen pipeline, the nitrogen pipeline being arranged on the side wall of the upper cavity of the radar sleeve and being used for introducing high-pressure nitrogen into the upper cavity of the radar sleeve;

[0019] and two servo electric cylinders, each servo electric cylinder being equipped with a telescopic rod and a slide, the two slides being arranged vertically, the servo electric cylinder being slidably mounted on the slides, one end of the telescopic rod being mounted on the servo electric cylinder, the other end of the telescopic rod being provided with a Y-shaped joint, the Y-shaped joint clamp being mounted on the upper antenna, and the telescopic rod of each servo electric cylinder being perpendicular to the slide;

[0020] Set the distance between the upper Y-joint and the lower Y-joint to be i, the distance from the lower Y-joint to the spherical universal joint to be j, and the length of the lower antenna to be k. When one servo electric cylinder drives the corresponding Y-joint to extend or contract by a distance a, the other servo electric cylinder drives the corresponding Y-joint to move a distance b in the same direction on the corresponding slide, and the end of the lower antenna moves a distance c in the opposite direction.

[0021] in,

[0022] Preferably, the apparatus further comprises a mounting plate, the mounting plate being annularly arranged on the inner wall of the connection portion between the upper cavity of the radar sleeve and the upper cavity of the radar sleeve, the upper surface of the mounting plate being used to mount the flange, and the lower surface of the mounting plate being used to mount a protective hatch, two protective hatches being mounted on both sides of the lower antenna via a cylinder, the cylinder being used to drive the protective hatches to open and close;

[0023] When the radar unit is in operation, the two protective doors move horizontally and away from the lower antenna;

[0024] When the radar unit stops working, the two protective doors move horizontally and approach the lower antenna.

[0025] Preferably, an infrared thermal imaging camera is provided on the inner wall of the top cover of the upper cavity of the radar sleeve;

[0026] A high-temperature resistant camera is provided on the top inner wall of the lower cavity of the radar sleeve.

[0027] Preferably, a lid handle is provided on the upper surface of the top cover of the upper cavity of the radar sleeve, and the top cover of the upper cavity of the radar sleeve supports taking;

[0028] An optical observation window is provided on the top cover of the upper cavity of the radar sleeve.

[0029] Preferably, a flange handle is provided on the upper surface of the flange, and the flange supports taking.

[0030] Preferably, the antenna protective clothing is made of high-temperature resistant canvas.

[0031] Preferably, the antenna protective clothing is trumpet-shaped, adapted to the shape of the lower antenna, and the top end of the antenna protective clothing is mounted on the lower antenna through a circular ring;

[0032] There is a gap between the top of the antenna protective clothing and the lower antenna;

[0033] When the nitrogen pipeline introduces high-pressure nitrogen into the upper cavity of the radar sleeve, a portion of the introduced high-pressure nitrogen enters the antenna protective clothing through the gap, and the antenna protective clothing is passively inflated.

[0034] Preferably, a plurality of through purge holes are provided on the horn antenna, and when high-pressure nitrogen is introduced into the nitrogen pipeline, high-pressure nitrogen is introduced into the purge holes.

[0035] A radar detection method in a high temperature environment, comprising the above-mentioned radar detection system in a high temperature environment, comprising:

[0036] The radar detection system in the high temperature environment is turned on, and the radar unit is connected to the host computer via Ethernet;

[0037] The host computer sends a working instruction to the radar unit, and the main control chip of the radar unit controls the radio frequency unit of the radar unit to transmit a continuous frequency modulation wave and receive echo data;

[0038] The temperature sensor and attitude sensor on the circuit board of the radar unit obtain the temperature information and attitude information of the radar unit itself in real time;

[0039] The main control chip of the radar unit collects the echo data, the temperature information and the posture information, and the radar unit sends the echo data, the temperature information and the posture information to a host computer via the Ethernet;

[0040] When the host computer finds that the radar unit is shaking violently according to the posture information, the host computer issues an alarm;

[0041] When the host computer detects abnormal information in the received echo data, the temperature information and the attitude information, the host computer sends a stop-work instruction to the radar unit, and the host computer controls the cylinder to close the protective hatch.

[0042] Preferably, the posture information is displayed on the host computer in the form of an electrocardiogram, with the electrocardiogram of the radar unit operating normally as a benchmark. When the electrocardiogram suddenly changes, the radar unit shakes violently.

[0043] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0044] The above scheme, the system and the method can perform quasi-real-time synchronous measurement of "material surface + temperature" in a high-temperature environment. Driven by two servo electric cylinders, the entire measurement system can be controlled to perform 3D scanning of the material surface. At the same time, double protection is adopted. In addition to the normal water cooling and passive protection of high-temperature protective clothing, a high-temperature active protection function is added, including active video monitoring of the mechanical state of the radar's own operation and the internal state of the high-temperature area. Relying on the attitude sensor installed on the radar head, it actively senses the vibration and impact of the high-temperature area on the antenna. Once it exceeds the normal value range, the protective hatch at the front end of the antenna is closed and the system stops working. The system can better adapt to high-temperature harsh environments and can self-monitor the abnormal state of the radar system, thereby improving the reliability and stability of the radar operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 1 is a schematic diagram of the system structure of an embodiment of the present invention in a blast furnace;

[0047] Figure 2 is a schematic diagram of a replaceable radar protective coat according to an embodiment of the present invention;

[0048] Figure 3 Schematic diagram of a radar protection hatch switch in an embodiment of the present invention;

[0049] Figure 4 is a schematic diagram of microwave channels of a radar and a thermal radiometer in an embodiment of the present invention;

[0050] Figure 5 This is a radar workflow diagram in an embodiment of the present invention;

[0051] Figure 6 is a top view of a servo electric cylinder controlling the movement of a horn antenna in an embodiment of the present invention;

[0052] Figure 7 Schematic diagram of the motion range of the horn antenna controlled by the servo electric cylinder in an embodiment of the present invention;

[0053] Figure 8 is a relationship diagram of the movement distances of various parts of the radar under the control of the servo electric cylinder in an embodiment of the present invention;

[0054] Figure 9 is a schematic diagram of a camera monitoring module in an embodiment of the present invention;

[0055] Figure 10 It is a schematic diagram of the Ethernet communication structure of the system in an embodiment of the present invention.

[0056] Reference numerals:

[0057] 1: Radar sleeve upper cavity; 2: Radar unit; 3: Thermal radiation meter; 4: Servo electric cylinder; 5: Slide; 6: High-temperature resistant camera; 7: Cylinder; 8: Protective hatch; 9: Radar sleeve lower cavity; 10: Antenna protective clothing; 11: Horn antenna; 12: Universal joint; 13: Microwave channel; 14: Nitrogen pipeline; 15: Infrared thermal imaging camera; 16: Material surface; 17: Lid handle; 18: Flange handle; 19: Optical observation window; 20: Telescopic rod; 21: Y-type connector. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0060] It should be noted that the terms "up", "down", "left", "right", "front" and "back" used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0061] Since a fixed radar can only measure distance information at a fixed point, a mechanical device can be used to control the radar to measure information at multiple points for material surface fitting. However, due to the extremely harsh high-temperature environment, hot air currents, dust, and other factors can easily adversely affect the radar during operation, resulting in significant deviations in radar scan data and even damage to the radar system. Therefore, the present invention provides a radar detection system and method for high-temperature environments, ensuring long-term stable operation of the radar under various harsh operating conditions, thereby obtaining accurate blast furnace material surface data and extending the radar's service life.

[0062] like Figures 1 to 4 As shown, a radar detection system for a high temperature environment includes a closed radar sleeve upper cavity 1 and a radar sleeve lower cavity 9 installed at the bottom of the radar sleeve upper cavity 1, wherein the radar sleeve upper cavity 1 and the radar sleeve lower cavity 9 are in a sleeve and are divided into an upper cavity and a lower cavity.

[0063] The system also includes a horn antenna 11. The radar sleeve upper cavity 1 and the radar sleeve lower cavity 9 are separated by a flange. The horn antenna 11 includes an upper antenna and a lower antenna that are integrated. The upper antenna is cylindrical and the lower antenna is horn-shaped. A spherical universal joint 12 is provided at the connection between the upper antenna and the lower antenna, wherein the spherical universal joint 12 is provided in the radar sleeve upper cavity 1, and the lower antenna is installed in the radar sleeve lower cavity 9 through the through hole in the middle of the flange. An antenna protective coat 10 is provided on the lower antenna, and the antenna protective coat 10 is made of a high-temperature resistant flexible material.

[0064] The specific structure of the horn antenna 11 is an integrated setting. The upper antenna of the horn antenna 11 is cylindrical and the lower antenna is horn-shaped. The structure of the horn antenna 11 in this application is the existing technology. A spherical universal joint 12 is installed at the connection between the upper antenna and the lower antenna. In this way, when the upper antenna is moved, the horn antenna 11 rotates with the spherical universal joint 12 as the base point, and the lower antenna rotates with the upper antenna.

[0065] The system further includes a radar unit 2 and a thermal radiometer 3. The radar unit 2 is connected to the horn antenna 11 via the H channel of the microwave channel 13, and the thermal radiometer 3 is connected to the horn antenna 11 via the V channel of the microwave channel 13.

[0066] The system also includes a nitrogen pipeline 14, which is arranged on the side wall of the upper cavity 1 of the radar sleeve. The nitrogen pipeline 14 is used to introduce high-pressure nitrogen into the upper cavity 1 of the radar sleeve. The nitrogen is mainly controlled by the size of the valve, and the flow rate is not precisely controlled. If necessary, a flow meter can be added to the nitrogen pipeline.

[0067] The system also includes two servo electric cylinders 4, each of which is equipped with a telescopic rod 20 and a slide 5. The two slides 5 are arranged vertically, and the servo electric cylinder is slidably mounted on the slides 5. One end of the telescopic rod 20 is mounted on the servo electric cylinder, and the other end of the telescopic rod 20 is provided with a Y-shaped joint 21. The Y-shaped joint 21 is clamped and mounted on the upper antenna. The telescopic rod 20 of each servo electric cylinder is perpendicular to the slide 5.

[0068] The distance between the upper Y-shaped joint 21 and the lower Y-shaped joint 21 is set to i, the distance between the lower Y-shaped joint 21 and the spherical universal joint 12 is set to j, and the length of the lower antenna is set to k. When one of the servo electric cylinders 4 drives the corresponding Y-shaped joint 21 to extend or contract by a distance a, the other servo electric cylinder 4 drives the corresponding Y-shaped joint 21 to move a distance b in the same direction on the corresponding slide 5, and the end of the lower antenna moves a distance c in the opposite direction; wherein,

[0069] like Figure 6 As shown, a top view of two servo cylinders 4 controlling the movement of a horn antenna 11 is shown. The entire servo cylinder 4 control system is mounted on a flange, with a slide 5 provided at the bottom of each servo cylinder 4. The servo cylinder 4 can perform translational motion on the slide 5 and is connected to the upper antenna via a Y-joint 21. The spherical universal joint 12 and the horn antenna 11 can be integrated. The telescopic rod 20 of the servo cylinder 4 is connected to the Y-joint 21 and can control the rotation of the horn antenna 11 around the spherical universal joint 12. When one servo cylinder 4 controls the rotation of the horn antenna 11 around the universal joint, the other servo cylinder 4 is driven by it and passively moves on its bottom slide 5. The two servo cylinders 4 can control the radar to move around the universal joint to any position on the plane to achieve 3D scanning of the material surface 16.

[0070] like Figure 7 The figure shows that two servo cylinders 4 control the range of motion of the horn antenna 11. The x and y coordinate systems are established with the extension and contraction directions of the two telescopic rods 20. The two servo cylinders 4 can control the radar to move to any coordinate (x, y) within the range of motion. Therefore, by setting the motion trajectory function, the radar can move along any path within the range of motion, such as the linear trajectory y = Ax + B, the circular trajectory (xA) 2 +(yB) 2 =C 2 .

[0071] like Figure 8 The figure shows the relationship between the movement distance of the entire horn antenna 11 under the control of the servo cylinder 4. When one servo cylinder 4 controls the telescopic rod 20 to move a distance, the other servo cylinder 4 will move in the same direction b along the slide 5 under its drive. The end of the horn antenna 11 will translate in the opposite direction c, where i, j, and k can be set according to the requirements of specific implementation. Therefore, by controlling the moving distance of the telescopic rods 20 of the two servo electric cylinders 4, the moving trajectory of the end of the radar antenna can be accurately controlled.

[0072] The system also includes a mounting plate, which is arranged in a ring shape on the inner wall of the connection part of the radar sleeve upper cavity 1 and the radar sleeve upper cavity 1. The upper surface of the mounting plate is used to install the flange, and the lower surface of the mounting plate is used to install the protective hatch 8. The two protective hatches 8 are installed on both sides of the lower antenna through the cylinder 7. The cylinder 7 is used to drive the protective hatches 8 to open and close; when the radar unit 2 is working, the two protective hatches 8 move horizontally and away from the lower antenna; when the radar unit 2 stops working, the two protective hatches 8 move horizontally and close to the lower antenna.

[0073] In a preferred embodiment, an infrared thermal imaging camera 15 is installed on the inner wall of the top cover of the radar sleeve upper chamber 1, and a high-temperature resistant camera 6 is installed on the top inner wall of the radar sleeve lower chamber 9. The high-temperature resistant camera only needs to be able to adapt to high-temperature environments and has no special functional requirements. Its main function is to roughly observe and judge the furnace environment and material surface when the protective hatch is open.

[0074] The top cover of the radar sleeve upper chamber 1 is provided with a handle 17, which supports handling. An optical observation window 19 is also provided on the top cover. A flange handle 18 is provided on the top surface of the flange, which supports handling. The antenna protective suit 10 is made of high-temperature resistant canvas. It is horn-shaped and conforms to the shape of the lower antenna. The top of the antenna protective suit 10 is mounted on the lower antenna via a circular ring. A gap exists between the top of the antenna protective suit 10 and the lower antenna. When high-pressure nitrogen is introduced into the radar sleeve upper chamber 1 through the nitrogen pipeline 14, a portion of the high-pressure nitrogen enters the antenna protective suit 10 through the gap, causing the antenna protective suit 10 to inflate. The horn antenna 11 is provided with multiple through-holes. When high-pressure nitrogen is introduced into the nitrogen pipeline 14, these holes are filled with high-pressure nitrogen.

[0075] This system adopts an integrated design and is installed on a flange, which is installed in a radar sleeve through the flange. The top of the radar sleeve is installed on the top of the blast furnace, and the material surface 16 in the furnace is scanned from the top of the blast furnace. The radar sleeve is divided into a radar sleeve upper cavity 1 and a radar sleeve lower cavity 9 through the flange. The entire radar-related system is installed on the mounting plate between the upper and lower cavities through the flange. There are two flange handles 18 on the flange. The entire radar system can be taken out directly from the sleeve through the flange handles 18 for rapid installation and disassembly. The radar sleeve upper cavity 1 can be opened through the top cover and opened in the radar sleeve upper cavity 1. An optical observation window 19 is set on the lid. A standard pressure-resistant quartz glass high-temperature lens is selected. The lens is a convex lens at the bottom with a wide angle, so that the mechanical working status of the inner cylinder can be seen clearly in dim light. At the same time, in order to prevent the lens from leaking, a cylindrical step is built outside the lens observation window. In case of leakage, the end cover nut can be buckled to prevent leakage without worrying about glass bursting. High-pressure nitrogen is introduced into the radar sleeve through the nitrogen pipeline 14 to cool the upper cavity to maintain a low-temperature environment. The lower cavity is connected to the inside of the blast furnace and is directly affected by the high-temperature harsh environment in the blast furnace. It is a high-temperature environment.

[0076] The lower end antenna of the horn antenna 11 is located in the lower cavity 9 of the radar sleeve, and a replaceable horn antenna 11 protective clothing 10 and a switchable high-temperature protective cabin door 8 are added.

[0077] like Figure 2 As shown, the horn antenna 11 protective clothing 10 is a replaceable protective clothing made of flexible high-temperature resistant material. The bottom of the horn antenna 11 is connected to a ring, which can be put on the opening at the bottom end of the horn antenna 11 through the ring. The upper part is fixed on the flange plate for installing the radar for easy replacement, and the flange plate has a certain opening. The high-pressure nitrogen introduced into the upper cavity can enter the antenna protective clothing 10 from the opening. The flexible antenna protective clothing 10 will swell under the action of high-pressure nitrogen, which can effectively buffer the impact of solid particles and high-temperature airflow in the blast furnace on the horn antenna 11, and play a role in protecting the radar horn antenna 11. At the same time, purge holes are distributed on the horn antenna 11. The high-pressure nitrogen is evenly pressed into the inner surface of the antenna through the purge holes of the horn antenna 11 by the inflated flexible outer clothing, and the inner surface of the antenna is purged to prevent dust from adhering to the surface of the horn, while playing a cooling role. The antenna protective clothing can be high-temperature resistant canvas, or other flexible and high-temperature resistant materials, such as carbon fiber textiles.

[0078] Protective hatch 8 is installed within the lower chamber 9 of the radar sleeve. Made of a material resistant to high temperatures and impacts, such as steel or carbon fiber, it consists of two panels. These panels can be opened and closed horizontally by cylinder 77. They are normally closed. When closed, horn antenna 11 is protected within, preventing direct exposure to high temperatures and harsh environments. This provides insulation, fire protection, impact protection, and erosion protection. When the radar is operating, protective hatch 8 opens horizontally, driven by cylinder 7, and horn antenna 11 scans the material surface 16 from the opening. This system is interlocked with an external DCS or PLC system. If the system detects abnormal furnace temperatures or status parameters, protective hatch 8 immediately closes, protecting horn antenna 11. When the external status of radar unit 2 is normal, protective hatch 8 opens, and radar unit 2 begins operation.

[0079] The radar unit 2 and the thermal radiometer 3 in the “millimeter wave radar + radiometer” measurement system are installed in the upper cavity 1 of the radar sleeve, as shown in FIG. Figure 4 As shown, the radar unit 2 and the thermal radiation meter 3 share the same horn antenna 11, but use different microwave channels 13V channel and H channel to receive microwave signals. The two microwave channels 13 cross vertically and do not affect each other. Time-sharing measurement forms a material surface 16 "morphology + temperature" measurement system.

[0080] This system can perform quasi-real-time synchronous measurement of "material surface + temperature" in a high-temperature environment. Driven by two servo electric cylinders 4, the entire measurement system can be controlled to perform 3D scanning of the material surface 16. At the same time, dual protection is adopted. In addition to the normal water cooling and passive protection of high-temperature protective clothing, a high-temperature active protection function is also added, including active video monitoring of the mechanical state of the radar's own operation and the internal state of the high-temperature area. Relying on the attitude sensor installed on the radar head, it actively senses the vibration and impact of the high-temperature area on the antenna. Once the normal value range is exceeded, the protective hatch 8 at the front end of the antenna is closed and the system stops working. The system can better adapt to high-temperature harsh environments and can self-monitor the abnormal state of the radar system, thereby improving the reliability and stability of the radar operation.

[0081] like Figure 9 The camera monitoring module shown is a camera installed in the upper and lower cavities of the radar sleeve;

[0082] Among them, the upper cavity 1 of the radar sleeve is cooled by introducing nitrogen, so it is a low-temperature environment. Therefore, an ordinary infrared thermal imaging camera is used. The system is installed on the cover on the top of the upper cavity 1 of the radar sleeve, and monitors the upper cavity of the radar sleeve from the top at a 45° angle. On the one hand, the temperature of the upper cavity can be monitored by infrared thermal imaging. When the temperature of the upper cavity is detected to be too high, the amount of nitrogen introduced is increased to cool it down. On the other hand, the operating status of the radar box and the thermal radiation meter 3 in the upper cavity can be monitored.

[0083] Since the lower cavity 9 of the radar sleeve is directly connected to the high-temperature environment inside the blast furnace, a high-temperature resistant camera 6 is used. The camera is installed in the protective hatch 8 of the lower cavity of the radar sleeve. It mainly monitors the opening and closing status of the protective hatch 8. At the same time, when the protective hatch 8 is open, the situation inside the blast furnace can be roughly observed through the camera. When it is observed that the blast furnace environment is very harsh, the protective hatch 8 can be directly closed to stop the radar from working, thereby preventing the radar from being damaged by working in a relatively harsh environment.

[0084] The normal working process of the entire system is as follows: the protective hatch 8 is in the closed state, and the horn antenna 11 is in the initial position. After receiving the system working command sent by the upper computer, the two protective hatches 8 are horizontally opened to both sides by the drive of the cylinder 7, so that the horn antenna 11 can illuminate the material surface 16 in the blast furnace from the opening of the protective hatch 8, and then the two servo electric cylinders 4 are controlled by PLC to set the movement path of the radar. The radar unit 2, the thermal radiation meter 3 and the horn antenna 11 start to rotate around the universal joint driven by the two servo electric cylinders 4. The radar horn antenna 11 scans the blast furnace material surface 16 from the opening of the protective hatch 8. The camera monitoring module monitors the working status of the entire system in real time in the upper and lower cavities of the radar sleeve respectively. At the same time, nitrogen is introduced into the whole process for cooling.

[0085] like Figure 10 As shown, the entire system uses industrial Ethernet for communication, where the radar unit 2, thermal radiation meter 3 and camera monitoring module can all use Ethernet communication and are connected to the same industrial switch outside the blast furnace through a network cable. The switch then transmits the data to the host computer monitoring center through an optical fiber, and the host computer monitoring center controls and monitors the entire system.

[0086] The present invention provides a radar 3D measurement system with self-monitoring and active protection in a high-temperature environment. The entire system can perform 3D scanning of the material surface 16 and measure the shape and temperature of the material surface 16 at the same time. In addition, the added high-temperature protection device can better adapt to the harsh high-temperature environment and can perform certain self-monitoring, thereby improving the stability and reliability of the radar system.

[0087] like Figure 5As shown, a radar detection method in a high temperature environment includes the above-mentioned radar detection system in a high temperature environment, including:

[0088] The radar detection system in the high temperature environment is turned on, and the radar unit 2 establishes a connection with the host computer via Ethernet;

[0089] The host computer sends a working instruction to the radar unit 2, and the main control chip of the radar unit 2 controls the radio frequency unit of the radar unit 2 to transmit a continuous frequency modulation wave and receive echo data;

[0090] The temperature sensor and attitude sensor on the circuit board of the radar unit 2 obtain the temperature information and attitude information of the radar unit 2 itself in real time;

[0091] The main control chip of the radar unit 2 collects the echo data, the temperature information and the posture information, and the radar unit 2 sends the echo data, the temperature information and the posture information to the host computer via the Ethernet;

[0092] When the host computer finds that the radar unit 2 is shaking violently according to the posture information, the host computer issues an alarm;

[0093] When the host computer detects abnormal information in the received echo data, the temperature information and the attitude information, the host computer sends a stop-work instruction to the radar unit 2 , and the host computer controls the cylinder 7 to close the protective door 8 .

[0094] The posture information is displayed on the host computer in the form of an electrocardiogram. Based on the electrocardiogram of the radar unit 2 during normal operation, when a sudden change occurs in the electrocardiogram, the radar unit 2 shakes violently.

[0095] The specific principles of this method are: Figure 5This is the working process of radar unit 2. After radar unit 2 is turned on, it first establishes an Ethernet connection with the host computer. The host computer sends a command to radar unit 2 to start working. The main control chip of radar unit 2 controls the radar radio frequency unit to transmit continuous frequency modulation waves, and then receives echo data. At the same time, the temperature sensor and attitude sensor on the circuit board of radar unit 2 will obtain the temperature information and attitude information of radar unit 2 in real time. The main control chip collects the echo data, temperature data and attitude data, and sends the data to the host computer via Ethernet; after the echo data is processed by the host computer, the material surface 16 distance information of multiple points in the scanning process is obtained, and then the echo data is processed. And it is fitted into the material surface 16 information of the blast furnace; the temperature data is directly displayed on the host computer, and a normal temperature threshold is set. When the temperature of the radar circuit board exceeds the normal threshold, a temperature abnormality alarm is issued; the posture data is displayed on the host computer in the form of an electrocardiogram, and the electrocardiogram when the radar is in normal motion is used as a benchmark. When the electrocardiogram suddenly changes, it indicates that the radar is shaking violently. At this time, the host computer issues a posture abnormality alarm; at the same time, after the host computer monitors any abnormal information of the circuit board of the radar unit 2, it promptly sends a command to the radar to stop working, and at the same time controls the protection hatch 8 to close to prevent the radar from being damaged due to operation in an abnormal state.

[0096] This method can perform quasi-real-time synchronous measurement of "material surface + temperature" in a high-temperature environment. Driven by two servo electric cylinders 4, the entire measurement system can be controlled to perform 3D scanning of the material surface 16. At the same time, double protection is adopted. In addition to the normal water cooling and passive protection of high-temperature protective clothing, a high-temperature active protection function is added, including active video monitoring of the mechanical state of the radar's own operation and the internal state of the high-temperature area. Relying on the attitude sensor installed on the radar head, it actively senses the vibration and impact of the high-temperature area on the antenna. Once the normal value range is exceeded, the protective hatch 8 at the front end of the antenna is closed and the system stops working. The system can better adapt to high-temperature harsh environments and can self-monitor the abnormal state of the radar system, thereby improving the reliability and stability of the radar operation.

[0097] There are a few points to note:

[0098] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0099] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present invention are exaggerated or reduced, that is, these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0100] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0101] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A radar detection system in a high temperature environment, characterized in that: It comprises a closed radar sleeve upper cavity and a radar sleeve lower cavity installed at the bottom of the radar sleeve upper cavity; And, a horn antenna, the upper cavity of the radar sleeve and the lower cavity of the radar sleeve are separated by a flange, the horn antenna includes an upper antenna and a lower antenna that are integrally arranged, the upper antenna is a columnar arrangement, the lower antenna is a horn-shaped arrangement, and a spherical universal joint is provided at the connection between the upper antenna and the lower antenna, wherein the spherical universal joint is arranged in the upper cavity of the radar sleeve, the lower antenna is installed in the lower cavity of the radar sleeve through the through hole in the middle of the flange, and an antenna protective clothing is provided on the lower antenna, and the antenna protective clothing is made of a high-temperature resistant flexible material; and a radar unit and a thermal radiometer, wherein the radar unit is connected to the horn antenna via an H channel of a microwave channel, and the thermal radiometer is connected to the horn antenna via a V channel of the microwave channel; and a nitrogen pipeline, the nitrogen pipeline being arranged on the side wall of the upper cavity of the radar sleeve and being used for introducing high-pressure nitrogen into the upper cavity of the radar sleeve; and two servo electric cylinders, each servo electric cylinder being equipped with a telescopic rod and a slide, the two slides being arranged vertically, the servo electric cylinder being slidably mounted on the slides, one end of the telescopic rod being mounted on the servo electric cylinder, the other end of the telescopic rod being provided with a Y-shaped joint, the Y-shaped joint clamp being mounted on the upper antenna, and the telescopic rod of each servo electric cylinder being perpendicular to the slide; Set the distance between the upper Y-joint and the lower Y-joint to be i, the distance from the lower Y-joint to the spherical universal joint to be j, and the length of the lower antenna to be k. When one servo electric cylinder drives the corresponding Y-joint to extend or contract by a distance a, the other servo electric cylinder drives the corresponding Y-joint to move a distance b in the same direction on the corresponding slide, and the end of the lower antenna moves a distance c in the opposite direction. in, 2. The radar detection system for high temperature environment according to claim 1, characterized in that: It also includes a mounting plate, which is annularly arranged on the inner wall of the connection portion between the upper cavity of the radar sleeve and the upper cavity of the radar sleeve, the upper surface of the mounting plate is used to mount the flange, and the lower surface of the mounting plate is used to mount a protective hatch, and the two protective hatches are mounted on both sides of the lower antenna through a cylinder, and the cylinder is used to drive the protective hatch to open and close; When the radar unit is in operation, the two protective doors move horizontally and away from the lower antenna; When the radar unit stops working, the two protective doors move horizontally and approach the lower antenna.

3. The radar detection system for high temperature environment according to claim 1, characterized in that: An infrared thermal imaging camera is provided on the inner wall of the top cover of the upper cavity of the radar sleeve; A high-temperature resistant camera is provided on the top inner wall of the lower cavity of the radar sleeve.

4. The radar detection system for high temperature environment according to claim 1, characterized in that: A lid handle is provided on the upper surface of the top cover of the upper cavity of the radar sleeve, and the top cover of the upper cavity of the radar sleeve supports taking; An optical observation window is provided on the top cover of the upper cavity of the radar sleeve.

5. The radar detection system for high temperature environment according to claim 1, characterized in that: A flange handle is provided on the upper surface of the flange, and the flange supports taking.

6. The radar detection system for high temperature environment according to claim 1, characterized in that: The antenna protective clothing is made of high-temperature resistant canvas.

7. The radar detection system for high temperature environment according to claim 1, characterized in that: The antenna protective clothing is horn-shaped and adapted to the shape of the lower antenna. The top end of the antenna protective clothing is mounted on the lower antenna through a circular ring. There is a gap between the top of the antenna protective clothing and the lower antenna; When the nitrogen pipeline introduces high-pressure nitrogen into the upper cavity of the radar sleeve, a portion of the introduced high-pressure nitrogen enters the antenna protective clothing through the gap, and the antenna protective clothing is passively inflated.

8. The radar detection system for high temperature environment according to claim 7, characterized in that: A plurality of through purge holes are provided on the horn antenna. When high-pressure nitrogen is introduced into the nitrogen pipeline, high-pressure nitrogen is introduced into the purge holes.

9. A radar detection method in a high temperature environment, characterized in that: The radar detection system for a high temperature environment according to any one of claims 1 to 8 comprises: The radar detection system in the high temperature environment is turned on, and the radar unit is connected to the host computer via Ethernet; The host computer sends a working instruction to the radar unit, and the main control chip of the radar unit controls the radio frequency unit of the radar unit to transmit a continuous frequency modulation wave and receive echo data; The temperature sensor and attitude sensor on the circuit board of the radar unit obtain the temperature information and attitude information of the radar unit itself in real time; The main control chip of the radar unit collects the echo data, the temperature information and the posture information, and the radar unit sends the echo data, the temperature information and the posture information to a host computer via the Ethernet; When the host computer finds that the radar unit is shaking violently according to the posture information, the host computer issues an alarm; When the host computer detects abnormal information in the received echo data, the temperature information and the attitude information, the host computer sends a stop-work instruction to the radar unit, and the host computer controls the cylinder to close the protective hatch.

10. The radar detection method in a high temperature environment according to claim 9, characterized in that: The posture information is displayed on the host computer in the form of an electrocardiogram. Based on the electrocardiogram of the normal operation of the radar unit, when the electrocardiogram suddenly changes, the radar unit shakes violently.

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