An online monitoring system and method for temperature distribution in the vacuum chamber of an ionizing radiation accelerator.

Abstract

This invention relates to an online monitoring system and method for temperature distribution in a vacuum chamber of an accelerator resistant to ionizing radiation. The system includes an infrared thermal imager, a radiation shielding box, a pan-tilt unit, a shielding box door, a stepper motor, a guide rail, limit switches, a lifting platform, and a control box. The infrared thermal imager is mounted on the pan-tilt unit inside the box, allowing for adjustable posture and temperature data acquisition. The shielding box door is driven by a stepper motor to slide along the guide rail, with limit switches controlling its movement. The radiation shielding box is mounted on the lifting platform, allowing for adjustable installation height. The control box is located in a low-radiation area, enabling remote control of the entire system and data reception via cables. This invention can achieve full-area acquisition of the two-dimensional temperature field in the vacuum chamber, solving the problems of incomplete coverage and difficulty in locating abnormal heat points in traditional single-point temperature measurement. The shielding structure enhances the equipment's radiation resistance, ensuring long-term stable operation. The adjustable equipment height and support for remote operation reduce the difficulty of on-site deployment and maintenance, mitigate personnel radiation risks, and demonstrate strong practicality.

Description

Technical Field

[0001] This invention belongs to the field of high-energy particle accelerator temperature measurement technology, and more specifically relates to an online monitoring system and method for temperature distribution in the vacuum chamber of an ionizing radiation accelerator. Background Technology

[0002] During the operation of large particle accelerator devices such as synchrotron radiation sources, the storage ring vacuum chamber experiences localized heating due to factors such as impedance wall effects, eddy current losses, and photon absorption. To optimize the vacuum chamber structure, accurately identify abnormal heating points, analyze beam impedance parameters, and improve beam operating current, the industry needs to conduct high-precision, comprehensive online monitoring of the surface temperature distribution of the vacuum chamber.

[0003] Currently, the mainstream approach for temperature monitoring in accelerator vacuum chambers is to use traditional contact-type temperature sensing devices such as thermocouples and fiber Bragg grating sensors. However, this approach has many unavoidable drawbacks in practical applications:

[0004] First, the temperature measurement coverage is limited. Traditional sensors can only collect temperature data at discrete points and cannot form a continuous temperature distribution map of the vacuum chamber surface. This makes it difficult to accurately locate localized abnormal heating areas, resulting in a significant shortcoming in monitoring effectiveness.

[0005] Second, the equipment has poor resistance to ionizing radiation. The interior of the accelerator tunnel is a strong ionizing radiation environment, with gamma rays, neutrons and other radiation sources coexisting and a high radiation dose rate. Conventional electronic temperature sensors working in this environment for a long time are prone to performance degradation, malfunction, or even complete damage, making it impossible to guarantee the stability and lifespan of the equipment.

[0006] Third, on-site deployment and subsequent maintenance are difficult and pose high safety risks. These contact sensors need to be installed close to the surface of the vacuum chamber, but the accelerator tunnel has a narrow space and high radiation intensity. This not only makes equipment deployment and maintenance operations inconvenient, but also significantly increases the radiation exposure risk to on-site personnel, resulting in high overall operating costs.

[0007] In addition, there is a common technical bias in the field that precision optoelectronic imaging components such as infrared thermal imagers have weak radiation resistance and cannot work stably for a long time in a strong ionizing radiation environment where gamma rays and neutrons coexist. Therefore, such equipment has never been used in accelerator vacuum chamber temperature monitoring scenarios. Summary of the Invention

[0008] To address the problems of discontinuous temperature monitoring, insufficient radiation resistance, and difficulties in deployment and maintenance in the existing technologies, this invention aims to provide an online monitoring system and method for temperature distribution in the vacuum chamber of an ionizing radiation accelerator.

[0009] The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to the present invention includes an infrared thermal imager, a radiation shielding box, a pan-tilt unit, a shielding box door, a stepper motor, a guide rail, a limit switch, a lifting platform, and a control box. The pan-tilt unit and the infrared thermal imager are both located inside the radiation shielding box. The infrared thermal imager is fixedly mounted on the pan-tilt unit to adjust its attitude and collect temperature data. The guide rail is fixed to the front end of the radiation shielding box, and the shielding box door is slidably mounted on the guide rail to open and close the temperature measurement viewport of the radiation shielding box. The stepper motor is driven by the shielding box door to drive its movement. The limit switch is located on the guide rail to control the movement stroke of the shielding box door. The radiation shielding box is fixed on the lifting platform to support it and adjust its installation height. A cable hole is provided at the rear of the radiation shielding box. The control box is located in a low-radiation area and is electrically connected to the infrared thermal imager, pan-tilt unit, stepper motor, and lifting platform via cables passing through the cable hole to achieve remote control and data reception of the entire system. This invention integrates temperature measuring components inside a shielded enclosure, along with an openable and closable shielding door, a lifting and supporting structure, and an external remote control unit. This combined architecture enables simultaneous monitoring of the entire accelerator vacuum chamber temperature, protection against ionizing radiation, and remote unmanned operation. It overcomes the shortcomings of traditional temperature measuring equipment, such as limited monitoring range, weak radiation resistance, and high on-site operation risks.

[0010] In a preferred embodiment, the radiation shielding box is a double-layer composite shielding structure, consisting of an outer lead plate for attenuating gamma rays and an inner polyethylene plate for attenuating neutron radiation, with the lead plate covering the outer side of the polyethylene plate. This invention, by employing a double-layer composite shielding structure of lead plate and polyethylene plate, can effectively attenuate gamma rays and neutron radiation respectively, significantly improving the operational stability and service life of the equipment inside the box in a mixed, strong ionizing radiation environment.

[0011] In a preferred embodiment, the shielding box door adopts the same double-layer composite shielding structure as the radiation shielding box. By using the same double-layer shielding structure for the shielding box door and the box body, this invention ensures the integrity of the overall shielding system after the shielding box door is closed, prevents radiation from entering from the door, and further enhances the overall anti-ionizing radiation capability of the device.

[0012] In a preferred embodiment, the guide rail is further provided with a physical limiting device, which works in conjunction with a limit switch to restrict the movement position of the shielded enclosure door. This invention, by employing a dual limiting structure combining electrical and physical limits, can precisely control the movement stroke of the shielded enclosure door, preventing malfunctions due to overtravel and ensuring long-term, reliable operation of the equipment under complex working conditions.

[0013] In a preferred embodiment, the lifting platform is a hydraulically driven lifting platform. By employing a hydraulically driven lifting platform to support the shielding enclosure, this invention allows for flexible adjustment of the installation height of the temperature measuring equipment, adapting to the temperature measurement needs of different height areas within the accelerator vacuum chamber, and improving the flexibility of equipment deployment and use.

[0014] In a preferred embodiment, the shielding box door is opened during the temperature acquisition phase to expose the temperature measurement viewport, and remains closed during the non-temperature acquisition phase to form a closed shielded space. This invention, by setting a time-sharing opening and closing operation mode for the shielding box door, can significantly shorten the radiation exposure time of the infrared thermal imager, reduce cumulative radiation damage to optoelectronic components, and resolve the inherent industry contradiction that infrared temperature measurement equipment requires an exposed field of view and is susceptible to radiation damage.

[0015] In a preferred embodiment, the gimbal drives the infrared thermal imager to perform horizontal rotation and pitch angle adjustment, thereby changing the temperature measurement angle of the infrared thermal imager. This invention, by driving the infrared thermal imager to perform multi-angle attitude adjustment via a gimbal, can expand the temperature measurement viewpoint range, achieving large-area scanning temperature measurement and overcoming the problem of limited field of view in traditional fixed temperature measurement equipment.

[0016] In a preferred embodiment, the pan-tilt unit drives the infrared thermal imager to complete multi-area temperature scanning with a single opening of the shielded enclosure door. This invention achieves multi-area temperature measurement through a single door opening combined with multi-angle scanning, reducing the frequency of opening and closing the shielded enclosure door, further shortening the overall radiation exposure time of the equipment, and improving the overall efficiency of temperature monitoring.

[0017] In a preferred embodiment, the infrared thermal imager acquires two-dimensional temperature field data of the accelerator vacuum chamber in a non-contact manner, thereby forming complete temperature distribution information. This invention, by employing a non-contact two-dimensional temperature field acquisition method, can generate a complete and continuous temperature distribution map of the vacuum chamber, accurately locate localized abnormal heating points, and overcome the limitation of traditional contact-based single-point temperature measurement, which cannot reflect the overall temperature state.

[0018] According to the online temperature monitoring method of the present invention, the above-mentioned online temperature distribution monitoring system for the vacuum chamber of an ionizing radiation accelerator is used for temperature measurement. The method includes the following steps: S1: The online temperature distribution monitoring system for the vacuum chamber of an ionizing radiation accelerator is moved to the position to be measured and fixed, and the lifting platform is adjusted to the working height; S2: The stepper motor is driven by the control box to open the shielded box door to expose the temperature measurement viewport; S3: The attitude of the infrared thermal imager is adjusted by the pan-tilt unit to collect two-dimensional temperature field data of the vacuum chamber and transmit it to the control box; S4: After data acquisition is completed, the stepper motor is driven to close the shielded box door, so that the equipment is back in a shielded protection state. This invention, by relying on a dedicated monitoring system to form a standardized time-sharing temperature measurement operation process, can automatically complete temperature acquisition in a strong radiation environment. The entire process does not require personnel to enter the high-radiation area, ensuring monitoring accuracy and equipment safety while completely avoiding the radiation exposure risk to personnel.

[0019] This invention integrates an infrared thermal imager and a gimbal inside a radiation shielding box. This is paired with a shielding box door driven by a stepper motor and controlled by limit switches. Combined with a lifting platform and a control box located in a low-radiation area, this forms a complete system. On one hand, it enables full-area acquisition of the two-dimensional temperature field on the surface of the accelerator vacuum chamber, effectively solving the problems of limited monitoring range and difficulty in locating abnormal heating points in traditional single-point temperature measurement methods. On the other hand, the radiation shielding box and the openable shielding door protect the equipment, significantly improving the operational stability of the entire device in strong ionizing radiation environments and preventing premature failure of electronic components. Simultaneously, the lifting platform allows for flexible adjustment of the equipment's installation height, and the external control box enables remote operation. This not only reduces the difficulty of equipment deployment and subsequent maintenance in narrow tunnels but also allows personnel to work without entering high-radiation areas, fundamentally avoiding radiation exposure risks. It comprehensively solves many shortcomings of existing technologies and possesses excellent practicality and operational reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the online monitoring system for temperature distribution in the vacuum chamber of an anti-ionizing radiation accelerator according to the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings. The embodiment is illustrated by taking the online monitoring system for temperature distribution in the vacuum chamber of the anti-ionizing radiation accelerator deployed in the storage ring tunnel of the Shanghai Synchrotron Radiation Facility as an example. Any modifications and improvements made by those skilled in the art under the premise of the present invention are within the protection scope of the present invention.

[0022] like Figure 1As shown, the online monitoring system for temperature distribution in the vacuum chamber of an anti-ionizing radiation accelerator disclosed in this invention includes an infrared thermal imager 1, a radiation shielding box 2, a pan-tilt unit 3, a shielding box door 4, a stepper motor 5, a guide rail 6, a limit switch 7, a lifting platform 8, moving wheels 10, and a control box (not shown in the figure).

[0023] The infrared thermal imager 1 and the pan-tilt unit 3 are both integrally assembled inside the radiation shielding box 2. The infrared thermal imager 1 is fixedly mounted on the pan-tilt unit 3 to adjust its attitude and collect temperature data. The guide rail 6 is fixed to the front end of the radiation shielding box 2. The shielding box door 4 is slidably mounted on the guide rail 6 to open and close the temperature measurement viewport of the radiation shielding box. The stepper motor 5 is driven by the shielding box door 4. Limit switches 7 are correspondingly set at both ends of the guide rail 6 to limit the movement of the shielding box door 4. The radiation shielding box 2 is fixedly mounted on the lifting platform 8 to support the radiation shielding box 2 and adjust its installation height. The casters 10 are mounted on the bottom of the lifting platform 8. A cable hole 11 is opened on the rear side of the radiation shielding box 2. The control box is located in a low-radiation area away from the accelerator tunnel. The control box is electrically connected to the infrared thermal imager 1, the pan-tilt unit 3, the stepper motor 5, and the lifting platform 8 through cables passing through the cable hole 11, realizing remote control of the whole machine and data transmission.

[0024] This invention abandons the traditional single-point contact temperature measurement scheme of thermocouples and fiber optic grating sensors, and adopts an overall architecture of infrared non-contact full-area temperature measurement, integrated radiation protection and remote automatic control. Compared with the existing technology, it can realize continuous temperature field acquisition on the surface of vacuum chamber, while significantly improving the radiation resistance of the equipment and reducing on-site operation risks and maintenance difficulties.

[0025] The infrared thermal imager 1 is the core temperature measuring component of this system. In this embodiment, a FLUKE TV33 infrared thermal imager is selected. The infrared thermal imager 1 is fixedly mounted on the pan-tilt unit 3 and housed inside the radiation shielding box 2.

[0026] Compared to the contact-type single-point temperature sensors used in existing technologies, this invention uses an infrared thermal imager 1 to collect two-dimensional temperature field data of the accelerator vacuum chamber surface in a non-contact manner. This can generate a complete and continuous temperature distribution map, which can quickly and accurately locate local abnormal heating points, and completely solve the defects of traditional single-point temperature measurement that cannot reflect the overall temperature distribution and miss heating faults.

[0027] The radiation shielding box 2 provides radiation protection for the infrared thermal imager 1 and the pan-tilt unit 3. It is an enclosed box structure. In this embodiment, the main body of the radiation shielding box has external dimensions of 24cm × 22cm × 31cm. The radiation shielding box 2 is fixedly installed on the upper surface of the lifting platform 8, and its rear side wall has a cable hole 11 for passing cables through.

[0028] The radiation shielding box 2 adopts a double-layer composite shielding structure, specifically including an outer lead plate 21 and an inner polyethylene plate 22, with the lead plate 21 covering the outer side of the polyethylene plate 22. In this embodiment, the thickness of the lead plate 21 is set to 3 cm, and the thickness of the polyethylene plate 22 is set to 5 cm; wherein the outer lead plate 21 is used to attenuate gamma rays in the accelerator environment, and the inner polyethylene plate 22 is used to attenuate neutron radiation.

[0029] Compared to existing temperature measuring devices without dedicated radiation protection, this invention employs a double-layer directional shielding structure combining lead plate 21 and polyethylene plate 22, which can simultaneously resist dual ionizing radiation from gamma rays and neutrons. This effectively prevents internal electronic components from being affected by radiation, resulting in performance degradation and failure, and ensures long-term stable operation of the equipment under high radiation conditions.

[0030] Lead plate 21 serves as the outer protective structure of radiation shielding box 2, and is fully covered and attached to the outer surface of polyethylene plate 22. Utilizing the strong gamma ray shielding properties of lead, it blocks external gamma rays from entering the interior of the box, providing the first line of radiation protection for the temperature measuring equipment inside the box.

[0031] The polyethylene plate 22 serves as the inner substrate and neutron protection layer of the radiation shielding box 2. It is located inside the lead plate 21 and forms a sealed chamber that accommodates the infrared thermal imager 1 and the gimbal 3. By utilizing the slowing down and absorption effect of polyethylene material on neutrons, neutron radiation shielding is achieved. Together with the outer lead plate 21, it forms a dual protection system.

[0032] The gimbal 3 is fixedly installed on the bottom surface of the internal chamber of the radiation shielding box 2, and the infrared thermal imager 1 is stably installed on the bearing end of the gimbal 3. In this embodiment, a high-precision gimbal is selected, with a rated load of 10kg, a horizontal rotation range of 0°~360°, and a pitch adjustment range of ±45°.

[0033] The gimbal 3 can drive the infrared thermal imager 1 to complete horizontal rotation and pitch angle adjustment, thereby changing the temperature measurement angle of the infrared thermal imager 1, enabling the infrared thermal imager 1 to be aimed at different areas of the vacuum chamber to complete scanning temperature measurement. Compared with fixed-installation temperature measurement equipment, this invention expands the temperature measurement view and temperature measurement range through the attitude adjustment function of the gimbal 3, and can complete multi-angle full-coverage temperature acquisition, adapting to complex tunnel installation environments.

[0034] The guide rail 6 is fixedly installed at the front temperature measuring viewing port of the radiation shielding box 2. The shielding box door 4 is slidably mounted on the guide rail 6 and can make horizontal reciprocating movements along the guide rail 6. The stepper motor 5 is fixed on the side wall of the radiation shielding box 2, and its output end is connected to the shielding box door 4 through a transmission screw. The stepper motor 5 drives the shielding box door 4 to complete the opening and closing actions along the guide rail 6. Limit switches 7 are respectively installed in the fully open and fully closed positions of the guide rail 6. In this embodiment, Omron limit switches are used. At the same time, a physical limit device is also provided on the guide rail 6. The physical limit device and the limit switch work together to limit the movement position of the shielding box door.

[0035] The shielding box door 4 adopts the same composite shielding structure of lead plate and polyethylene plate as the radiation shielding box 2. During temperature measurement, the stepper motor 5 drives the shielding box door 4 to open along the guide rail 6, exposing the temperature measurement viewing port; after the temperature measurement is completed, the stepper motor 5 drives the shielding box door 4 to close in the reverse direction, completely enclosing the infrared thermal imager 1 inside the shielding box. The limit switch 7 is used to accurately determine the travel position of the shielding box door 4, and works with the physical limit device to prevent the door from moving beyond its travel range.

[0036] Compared to temperature measuring devices that are exposed to radiation all day long, this invention features an automatically opening and closing shielded door 4, which opens the viewing port only during temperature measurement and remains closed at other times, further reducing the duration of radiation exposure to the equipment and extending its service life. At the same time, the limit switch 7 works in conjunction with the physical limit device to ensure the door operates safely and with precise movements.

[0037] The lifting platform 8 is a hydraulically driven scissor lift platform, with the radiation shielding box 2 fixedly mounted on top of the lifting platform 8. Four casters 10 are evenly distributed at the bottom of the lifting platform 8, and anchor bolts and other fixing devices are also provided at the bottom of the lifting platform 8. In this embodiment, the lifting adjustment range of the lifting platform 8 is 0.5m to 1.5m.

[0038] The casters 10 can move the entire system freely, enabling rapid transfer of different temperature measurement points; the lifting platform 8 can flexibly adjust the installation height of the radiation shielding box 2 and the infrared thermal imager 1 according to the height of the vacuum chamber to be measured; the anchor bolts can fix the entire machine after it is in place, preventing the equipment from shifting during operation.

[0039] Compared to traditional temperature measuring devices that are fixed in position and cannot be flexibly moved or adjusted in height, this invention integrates a movable and height-adjustable lifting platform 8, which makes equipment deployment, relocation, and height adjustment convenient and greatly reduces the difficulty of equipment deployment and maintenance in narrow tunnels.

[0040] Cable hole 11 is located on the rear wall of the radiation shielding box 2 and is a waterproof cable connector structure. The power cord and network cable of the infrared thermal imager 1, as well as the control lines of the pan-tilt unit 3, stepper motor 5, and lifting platform 8, all pass through cable hole 11 and are led outwards, then connected to the external control box via on-site cable trays. Cable hole 11 ensures the normal installation of cables while maintaining the overall shielding and sealing of the radiation shielding box 2, preventing radiation from leaking out or intruding from the cable penetration.

[0041] The control box is independently located in a low-radiation safety area outside the accelerator tunnel. It integrates a PLC and industrial computer, and all cables leading from cable hole 11 ultimately connect to the control box. Operators can remotely control the entire machine via the control box, including starting and stopping the stepper motor 5, opening and closing the shielded enclosure door 4, adjusting the gimbal 3's attitude, adjusting the lifting platform 8's height, and data acquisition and storage from the infrared thermal imager 1.

[0042] Compared to traditional equipment that requires personnel to enter high-radiation tunnels for operation, this invention places the control terminal externally in a low-radiation area, enabling remote unmanned operation throughout the entire process. This reduces the risk of radiation exposure for workers at the source and facilitates centralized data management and subsequent equipment maintenance.

[0043] The overall working process of the system of this invention is as follows:

[0044] The first step is to position the equipment: push the entire system to the corresponding position in the vacuum chamber of the accelerator to be tested using the bottom casters 10, and tighten the anchor bolts at the bottom of the lifting platform 8 to complete the fixation; adjust the hydraulic lifting platform 8 to the appropriate height according to the height of the position to be tested by controlling the control box.

[0045] The second step is to activate the temperature measurement mode: The operator issues a command from the external control box to remotely control the stepper motor 5 to operate, driving the shielded box door 4 to slide horizontally along the guide rail 6 to open. When the shielded box door 4 touches the limit switch 7 at the fully open position, the stepper motor 5 stops operating.

[0046] The third step is temperature acquisition: The control box controls the pan-tilt unit 3 to rotate the infrared thermal imager 1 horizontally and adjust its pitch angle, aligning the imager 1 with the area to be measured in the vacuum chamber. A single door opening allows for multi-angle scanning to acquire temperature data over a large area of ​​the vacuum chamber, reducing the frequency of door opening and closing and the total exposure time to radiation. The infrared thermal imager 1 continuously acquires two-dimensional temperature field data of the vacuum chamber surface in a non-contact manner and transmits it in real-time via cable to the industrial computer in the control box for storage and processing, generating a complete temperature distribution map. Staff can quickly identify abnormal temperature rise points based on the map.

[0047] Fourth step, end temperature measurement: After the temperature measurement of a single area or the whole area is completed, the control box controls the stepper motor 5 to run in reverse again, driving the shielding box door 4 to close along the guide rail 6 until it reaches the limit switch 7 in the fully closed position. The shielding box door 4 completely closes the viewing port of the radiation shielding box 2, and the equipment inside the box continues to be in a radiation protection state.

[0048] The system of this invention was deployed inside the storage ring tunnel of the Shanghai Synchrotron Radiation Facility, where the on-site air absorbed dose rate is as high as 8 Gy / h, which is a typical strong ionizing radiation environment. The entire system operated continuously for 12 months without any equipment failures or performance degradation, demonstrating excellent operational stability. The system can completely acquire continuous temperature distribution maps along the circumference of the accelerator vacuum chamber, successfully identifying multiple local abnormal temperature rise points, providing accurate and reliable data support for vacuum chamber structure optimization, beam impedance analysis, and beam current enhancement.

[0049] In summary, this invention, through its integrated design of infrared non-contact temperature measurement, double-layer composite radiation shielding structure, automatic protective door, movable lifting mechanism, and remote centralized control, comprehensively overcomes many shortcomings of existing technologies, such as incomplete coverage of point-based temperature measurement, weak radiation resistance of equipment, difficult deployment and maintenance, and high radiation risk to personnel. The overall solution is novel in structure and highly practical.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator, characterized in that, Includes infrared thermal imager, radiation shielding box, pan-tilt unit, shielding box door, stepper motor, guide rail, limit switch, lifting platform and control box; Both the gimbal and the infrared thermal imager are housed inside a radiation shielding box. The infrared thermal imager is fixedly mounted on the gimbal so that the attitude of the infrared thermal imager can be adjusted and temperature data can be collected. The guide rail is fixed to the front end of the radiation shielding box. The shielding box door is slidably mounted on the guide rail to open and close the temperature measurement port of the radiation shielding box. The stepper motor is connected to the shielding box door to drive the shielding box door to move. The limit switch is set on the guide rail to control the movement stroke of the shielding box door. The radiation shielding box is fixed on the lifting platform so that the lifting platform can support the radiation shielding box and adjust its installation height. The radiation shielding box has a wire hole on the rear side. The control box is located in the low radiation area. The control box is electrically connected to the infrared thermal imager, pan-tilt unit, stepper motor and lifting platform through the wire hole to realize remote control of the whole machine and data reception.

2. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The radiation shielding box is a double-layer composite shielding structure, consisting of an outer lead plate for attenuating gamma rays and an inner polyethylene plate for attenuating neutron radiation, with the lead plate covering the outer side of the polyethylene plate.

3. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 2, characterized in that, The shielding box door adopts the same double-layer composite shielding structure as the radiation shielding box.

4. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The guide rail is also equipped with a physical limiting device, which works in conjunction with a limit switch to restrict the movement position of the shielded box door.

5. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The lifting platform is a hydraulically driven lifting platform.

6. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The shielding box door is opened during the temperature acquisition phase to expose the temperature measurement viewing port, and remains closed during the non-temperature acquisition phase to form a closed shielding space.

7. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The gimbal drives the infrared thermal imager to complete horizontal rotation and pitch angle adjustment, thereby changing the temperature measurement angle of the infrared thermal imager.

8. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The gimbal drives the infrared thermal imager to complete a multi-area temperature scan with a single opening of the shielded box door.

9. The online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator according to claim 1, characterized in that, The infrared thermal imager acquires two-dimensional temperature field data of the accelerator vacuum chamber in a non-contact manner, thereby forming complete temperature distribution information.

10. A method for online temperature monitoring, characterized in that, Temperature measurement using the online monitoring system for temperature distribution in the vacuum chamber of an ionizing radiation accelerator as described in any one of claims 1 to 9 is characterized by comprising the following steps: S1: The online monitoring system for temperature distribution in the vacuum chamber of the anti-ionizing radiation accelerator is moved to the position to be measured and fixed, and the lifting platform is adjusted to the working height; S2: Drive the stepper motor through the control box to open the shielded box door and expose the temperature measurement viewing port; S3: Adjust the attitude of the infrared thermal imager via the gimbal, collect two-dimensional temperature field data of the vacuum chamber and transmit it to the control box; S4: After data acquisition is completed, drive the stepper motor to close the shielded box door, so that the equipment is back in the shielded protection state.

Images