A temperature control method and device for MR equipment

Abstract

This invention discloses a temperature control method and apparatus for MR (Radar) equipment, relating to the field of MR equipment technology. Its main objective is to achieve precise control of the water supply temperature of the RFPA (Radio Frequency Amplifier) ​​unit, thereby improving the cooling effect of the RFPA unit. The main technical solution of this invention is as follows: acquiring the water supply temperature of the RFPA unit in the MR equipment; determining whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature, where the floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operating requirements of the RFPA unit; if not, controlling the normally open electric heater to remain continuously on and the compensating electric heater to open and close intermittently; if yes, controlling the normally open electric heater and the compensating electric heater to remain continuously off. This invention is used for temperature control of MR equipment.

Description

Technical Field

[0001] This invention relates to the field of MR equipment technology, and in particular to a temperature control method and apparatus for MR equipment. Background Technology

[0002] MR (Magnetic Resonance) equipment mainly consists of a magnet system, coil receiver, control cabinet, and operating console. Its principle is based on the magnetization of hydrogen nuclei in a magnetic field. This magnetization is excited by radio frequency (RF) signals, generating magnetic resonance. The RF coil receives the magnetic resonance signals, and the resulting image is reconstructed to visualize the human body structure. To ensure proper operation and accurate imaging, the magnet system must be maintained at an ultra-low temperature of 4 Kelvin (-270°C). Therefore, a chiller is used to cool the RFPA (Radio Frequency Amplifier) ​​unit within the MR equipment. However, since the chiller's water supply temperature is insufficient to cool the RFPA unit, heating is used to compensate for this temperature difference.

[0003] Currently, the existing method to meet the temperature requirements for cooling the RFPA unit in MR equipment is generally to use heat exchange plates to compensate for the supply water temperature of the RFPA unit. However, using heat exchange plates not only results in a slow temperature response but also a loss of heat exchange performance, making it impossible to accurately control the supply water temperature of the RFPA unit, thus affecting the cooling effect of the RFPA unit. Summary of the Invention

[0004] In view of the above problems, the present invention provides a temperature control method and device for MR equipment, the main purpose of which is to achieve precise control of the water supply temperature of the RFPA unit and improve the cooling effect of the RFPA unit.

[0005] To solve the above-mentioned technical problems, the present invention proposes the following solution:

[0006] In a first aspect, the present invention provides a temperature control method for an MR device, the method comprising:

[0007] Obtain the water supply temperature of the RFPA unit in the MR equipment;

[0008] Determine whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operation requirements of the RFPA unit.

[0009] If so, then control the normally open electric heater to remain on continuously and the compensating electric heater to open and close intermittently;

[0010] If not, then the normally open electric heater and the compensation electric heater are kept off.

[0011] Secondly, the present invention provides a temperature control device for an MR device, the device comprising:

[0012] The acquisition unit is used to acquire the water supply temperature of the RFPA unit in the MR equipment;

[0013] The judgment unit is used to determine whether the water supply temperature of the RFPA unit obtained by the acquisition unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable working requirements of the RFPA unit.

[0014] The first control unit is configured to control the normally open electric heater to continue to be turned on and the compensation electric heater to open and close intermittently if the judgment unit determines that the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature.

[0015] The second control unit is configured to control the normally open electric heater and the compensation electric heater to remain closed if the judgment unit determines that the water supply temperature of the RFPA unit is not higher than the upper limit of the floating range corresponding to the target temperature.

[0016] To achieve the above objectives, according to a third aspect of the present invention, a storage medium is provided, the storage medium including a stored program, wherein, when the program is executed, the device in which the storage medium is located is controlled to perform the temperature control method of the MR device described in the first aspect.

[0017] To achieve the above objectives, according to a fourth aspect of the present invention, a processor is provided for running a program, wherein the program executes the temperature control method for the MR device described in the first aspect.

[0018] By employing the above technical solution, the present invention provides a temperature control method and apparatus for MR equipment. When it is necessary to control the water supply temperature of the RFPA unit in the MR equipment, the method first obtains the water supply temperature of the RFPA unit in the MR equipment, then determines whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operating requirements of the RFPA unit. Finally, if not, the method controls the normally open electric heater to be continuously turned on and the compensation electric heater to be intermittently turned on and off; if so, the method controls the normally open electric heater and the compensation electric heater to be continuously turned off. Through the technical solution provided by the present invention, the opening and closing of the normally open electric heater and the intermittent opening and closing of the compensation electric heater can be controlled according to the water supply temperature of the RFPA unit. Compared with the traditional heat exchange plate method, the temperature response speed is faster and the heat exchange performance loss is smaller, thereby achieving precise control of the water supply temperature of the RFPA unit, effectively improving the cooling effect of the RFPA unit, and thus ensuring the normal operation and accurate imaging of the MR equipment.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 A flowchart of a temperature control method for an MR device provided by an embodiment of the present invention is shown;

[0022] Figure 2 A flowchart of another temperature control method for an MR device provided by an embodiment of the present invention is shown;

[0023] Figure 3 This diagram illustrates a block diagram of a temperature control device for an MR device according to an embodiment of the present invention.

[0024] Figure 4 A block diagram of a temperature control device for another MR device provided in an embodiment of the present invention is shown. Implementation

[0025] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0026] Currently, existing methods for meeting the temperature requirements of RFPA units in MR equipment generally involve using heat exchange plates to compensate for the supply water temperature of the RFPA unit. However, using heat exchange plates not only results in a slow temperature response but also in some loss of heat exchange performance, making it impossible to accurately control the supply water temperature of the RFPA unit and thus affecting the cooling effect. This invention controls the opening and closing of a normally open electric heater and the intermittent opening and closing of a compensation electric heater based on the supply water temperature of the RFPA unit. Compared to the traditional heat exchange plate method, this method offers a faster temperature response and less loss of heat exchange performance, thereby achieving precise control of the supply water temperature of the RFPA unit, effectively improving the cooling effect, and ensuring the normal operation and accurate imaging of the MR equipment.

[0027] Therefore, this invention provides a temperature control method for MR equipment. This method enables precise control of the water supply temperature to the RFPA unit, thereby improving the cooling effect on the RFPA unit. The specific execution steps are as follows: Figure 1 As shown, it includes:

[0028] 101. Obtain the water supply temperature of the RFPA unit in the MR equipment.

[0029] It should be noted that in this embodiment, the RFPA unit (radio frequency power amplifier) ​​is a precision component in the MC imaging equipment. Since a chiller unit is used to supply water and dissipate heat in actual applications, the water supply temperature of the RFPA unit in the MR equipment can be directly obtained. Specifically, the PLC controller in the MR equipment will collect the water supply temperature of the RFPA unit in real time through the water temperature probe, thereby obtaining the water supply temperature of the RFPA unit in order to execute the subsequent step 102.

[0030] 102. Determine whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature.

[0031] The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operating requirements of the RFPA unit. It should be noted that in this embodiment, the target temperature is the temperature required for the RFPA unit to operate stably, typically 22.5°C. The floating range corresponding to the target temperature is the temperature range that meets the stable operating requirements of the RFPA unit, i.e., the temperature control accuracy of the RFPA unit, typically ±0.1°C. Therefore, the floating range corresponding to the target temperature is 22.4-22.6°C. Since the water supply temperature of the RFPA unit has been obtained in step 101, it can be determined whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature. If not, proceed to step 103; otherwise, proceed to step 104.

[0032] 103. Control the normally open electric heater to be continuously turned on and the compensating electric heater to be turned on and off intermittently.

[0033] It should be noted that in this embodiment, since step 102 has determined that the water supply temperature of the RFPA unit is not higher than the upper limit of the floating range corresponding to the target temperature, that is, the water supply temperature of the RFPA unit does not exceed the upper limit of the temperature control accuracy corresponding to the RFPA unit. However, in actual applications, the water supply temperature of the chiller unit is generally 22°C, while the operating temperature requirement of the RFPA unit is generally 22.5°C. That is, the water supply temperature of the chiller unit cannot reach the operating temperature requirement corresponding to the RFPA unit. Therefore, it is necessary to heat the water supply temperature. This can be achieved by controlling the normally open electric heater to be continuously turned on and the compensation electric heater to be intermittently turned on and off. The normally open electric heater is used to keep the water supply temperature in a normally open state, while the compensation electric heater is used to achieve thermal compensation of the water supply temperature through intermittent opening and closing, thereby maintaining the water supply temperature within the floating range of 22.4-22.6°C corresponding to the target temperature, which satisfies the temperature control accuracy corresponding to the RFPA unit and ensures that the RFPA unit is in a stable working state.

[0034] 104. Control the normally open electric heater and the compensation electric heater to remain closed.

[0035] It should be noted that in this embodiment, since step 102 has determined that the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature, that is, the water supply temperature of the RFPA unit exceeds the upper limit of the temperature control accuracy corresponding to the RFPA unit, there is no need to heat the water supply temperature at this time. It is only necessary to control the normally open electric heater and the compensation electric heater to remain closed, so that the water supply temperature slowly decreases until the water supply temperature of the RFPA unit is not higher than the upper limit of the floating range corresponding to the target temperature. Then, the normally open electric heater is controlled to remain open and the compensation electric heater is controlled to open and close intermittently to meet the temperature control accuracy corresponding to the RFPA unit and ensure that the RFPA unit is in a stable working state.

[0036] Based on the above Figure 1As can be seen from the implementation method, the temperature control method for MR equipment provided by this invention, when it is necessary to control the water supply temperature of the RFPA unit in the MR equipment, firstly, obtains the water supply temperature of the RFPA unit in the MR equipment, then determines whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operating requirements of the RFPA unit. Finally, if not, the normally open electric heater is controlled to be continuously turned on and the compensation electric heater is controlled to be intermittently turned on and off; if yes, the normally open electric heater and the compensation electric heater are controlled to be continuously turned off. Through the technical solution provided by this invention, the opening and closing of the normally open electric heater and the intermittent opening and closing of the compensation electric heater can be controlled according to the water supply temperature of the RFPA unit. Compared with the traditional heat exchange plate heat exchange method, the temperature response speed is faster and the heat exchange performance loss is smaller, thereby achieving precise control of the water supply temperature of the RFPA unit, effectively improving the cooling effect of the RFPA unit, and thus ensuring the normal operation and accurate imaging of the MR equipment.

[0037] Furthermore, the preferred embodiment of the present invention is based on the above... Figure 1 Based on this, a detailed explanation of the temperature control process for MR equipment is provided, including the specific steps as follows: Figure 2 As shown, it includes:

[0038] 201. Obtain the water supply temperature of the RFPA unit in the MR equipment.

[0039] This step combines the description of step 101 in the above method, and the same content will not be repeated here.

[0040] 202. Determine whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature.

[0041] This step combines the description of step 102 in the above method, and the same content will not be repeated here. If not, proceed to step 203; otherwise, proceed to step 205.

[0042] 203. During the process of controlling the normally open electric heater to start, calculate the percentage of heating demand corresponding to the water supply temperature of the RFPA unit based on a preset algorithm.

[0043] It should be noted that in this embodiment, the preset algorithm is the PID control algorithm, which stands for "proportional, integral, and derivative," a common "stability-maintaining" control algorithm. Since the water supply temperature of the RFPA unit may vary due to the heat load of the RFPA unit, and the amount of variation is not regular, the heating demand percentage corresponding to the water supply temperature of the RFPA unit can be calculated based on the preset algorithm. The heating demand percentage specifically refers to the heating compensation requirement for the water supply temperature of the RFPA unit to reach the target temperature. Specifically, the difference between the target temperature and the water supply temperature of the RFPA unit can be calculated to obtain the temperature difference result; PID calculation can be performed on the temperature difference result to obtain the PID output value corresponding to the water supply temperature of the RFPA unit; and the PID output value can be used as the heating demand percentage corresponding to the water supply temperature of the RFPA unit. The heating compensation requirement is determined by PID calculation based on the actual temperature difference between the target temperature and the water supply temperature of the RFPA unit. The larger the actual temperature difference, the greater the heating compensation requirement, and the smaller the actual temperature difference, the smaller the heating compensation requirement. Since the PID output value is a percentage of 0-100%, the PID output value can be directly used as the heating requirement percentage for subsequent step 204.

[0044] 204. Determine the start and stop times of the compensating electric heater based on the percentage of heating demand, and use the start and stop times to control the intermittent opening and closing of the compensating electric heater.

[0045] It should be noted that in this embodiment, since the heating demand percentage has been determined, the start-stop time of the compensating electric heater can be determined based on the heating demand percentage. Specifically, the pulse period corresponding to PWM pulse width modulation is obtained; the start-stop time of the compensating electric heater is calculated based on the pulse period and the heating demand percentage, and the start-stop time is used to control the intermittent opening and closing of the compensating electric heater. PWM pulse width modulation is a very effective technique for controlling analog circuits using digital signals from a microprocessor. It modulates the start-stop of the compensating electric heater according to the change in the corresponding heat load of the RFPA unit, that is, it changes the opening and closing time of the compensating electric heater, thereby enabling the compensating electric heater to compensate for the water supply temperature of the RFPA unit. The pulse period is the duration corresponding to one start-stop operation of the compensating electric heater. Based on this duration and the heating demand percentage, the start-stop time of the compensating electric heater can be determined. For example, assuming the pulse period Tc is 20s and the heating demand percentage u(t) is 30%, then the start-stop time of the compensating electric heater, i.e., the opening and closing time, is:

[0046] Turn-on time = Tc * u(t) = 20s * 30% = 6s; Turn-off time = 20s - 6s = 14s. That is, the turn-on time of the compensating electric heater is 6s and the turn-off time is 14s within one pulse cycle.

[0047] Furthermore, to ensure that the compensating electric heater can accurately compensate for the water supply temperature of the RFPA unit when it is turned on, and to dynamically and accurately respond to the heat load of the RFPA unit, specifically, the load status of the RFPA unit in the MR equipment is acquired; the switching time points corresponding to the start and stop times are determined based on the heat load status; and the intermittent opening and closing of the compensating electric heater is controlled based on the switching time points. The switching time points include the start time point and the stop time point corresponding to one pulse cycle of the start and stop times, thereby controlling the intermittent opening and closing of the compensating electric heater based on the start and stop time points.

[0048] Furthermore, before steps 203-204 are executed, to ensure the accuracy of continuously controlling the normally open electric heater and intermittently opening and closing the compensating electric heater, specifically, it can be detected whether the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature; if not, then the normally open electric heater is continuously controlled to open and the compensating electric heater is intermittently opened and closed; if so, then the water supply temperature of the RFPA unit in the MR equipment is reacquired. The lower limit of the floating range corresponding to the target temperature is 22.4°C. If the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature, it indicates that the water supply temperature of the RFPA unit exceeds the lower limit of the temperature control accuracy corresponding to the RFPA unit. In other words, it is necessary to continuously control the normally open electric heater and intermittently open and close the compensating electric heater to achieve heating compensation for the water supply temperature of the RFPA unit. Therefore, before executing steps 203-204, it is possible to pre-detect whether the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature, thereby improving the accuracy of continuously controlling the normally open electric heater and intermittently opening and closing the compensating electric heater.

[0049] 205. Control the normally open electric heater and the compensation electric heater to remain closed.

[0050] This step combines the description of step 104 in the above method, and the same content will not be repeated here.

[0051] Furthermore, as a response to the above Figure 1-2The implementation of the method embodiment shown in this invention provides a temperature control device for an MR device. This device is used to achieve precise control of the water supply temperature of the RFPA unit, thereby improving the cooling effect of the RFPA unit. The embodiment of this device corresponds to the foregoing method embodiment. For ease of reading, this embodiment will not repeat the details of the foregoing method embodiment, but it should be clear that the device in this embodiment can implement all the contents of the foregoing method embodiment. Specifically, as shown... Figure 3 As shown, the device includes:

[0052] Acquisition unit 31 is used to acquire the water supply temperature of the RFPA unit in the MR equipment;

[0053] The judgment unit 32 is used to determine whether the water supply temperature of the RFPA unit obtained by the acquisition unit 31 is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable working requirements of the RFPA unit.

[0054] The first control unit 33 is used to control the normally open electric heater to continue to be turned on and the compensation electric heater to open and close intermittently if the judgment unit 32 determines that the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature.

[0055] The second control unit 34 is used to control the normally open electric heater and the compensation electric heater to remain closed if the judgment unit 32 determines that the water supply temperature of the RFPA unit is not higher than the upper limit of the floating range corresponding to the target temperature.

[0056] Furthermore, such as Figure 4 As shown, the device further includes:

[0057] The detection unit 35 is used to detect whether the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature before the first control unit 33.

[0058] The first control unit 33 is specifically used for,

[0059] If the detection unit 35 detects that the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature, it controls the normally open electric heater to continue to be turned on and the compensation electric heater to open and close intermittently.

[0060] The acquisition unit 31 is specifically used for,

[0061] If the detection unit 35 detects that the water supply temperature of the RFPA unit is not lower than the lower limit of the floating range corresponding to the target temperature, then the water supply temperature of the RFPA unit in the MR device is re-acquired.

[0062] Furthermore, such as Figure 4 As shown, the first control unit 33 includes:

[0063] Calculation module 331 is used to calculate the percentage of heating demand corresponding to the water supply temperature of the RFPA unit based on a preset algorithm during the process of controlling the normally open electric heater to turn on.

[0064] The processing module 332 is used to determine the start-stop time corresponding to the compensation electric heater based on the heating demand percentage obtained by the calculation module 331, and to control the intermittent opening and closing of the compensation electric heater using the start-stop time.

[0065] Furthermore, such as Figure 4 As shown, the computing module 331 includes:

[0066] The first calculation submodule 3311 is used to calculate the difference between the target temperature and the water supply temperature of the RFPA unit to obtain the temperature difference result.

[0067] The second calculation submodule 3312 is used to perform PID calculation on the temperature difference result obtained by the first calculation submodule 3311 to obtain the PID output value corresponding to the water supply temperature of the RFPA unit.

[0068] The determination submodule 3313 is used to take the PID output value obtained by the second calculation submodule 3313 as the heating demand percentage corresponding to the water supply temperature of the RFPA unit.

[0069] Furthermore, such as Figure 4 As shown, the processing module 332 includes:

[0070] The acquisition submodule 3321 is used to acquire the pulse period corresponding to PWM pulse width modulation.

[0071] The processing submodule 3322 is used to calculate the start-stop time of the compensation electric heater based on the pulse period and the heating demand percentage obtained by the acquisition submodule 3321, and to use the start-stop time to control the intermittent opening and closing of the compensation electric heater.

[0072] Furthermore, such as Figure 4 As shown, the processing submodule 3322 is specifically used for,

[0073] Obtain the heat load information of the RFPA unit in the MR device;

[0074] The switching time point corresponding to the start-up and shutdown time is determined based on the heat load conditions;

[0075] The intermittent opening and closing of the compensation electric heater is controlled based on the switching time point.

[0076] Furthermore, embodiments of the present invention also provide a storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the above-described... Figure 1-2 The temperature control method for MR equipment described herein.

[0077] Furthermore, embodiments of the present invention also provide a processor for running a program, wherein the program executes the above-described... Figure 1-2 The temperature control method for MR equipment described herein.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] It is understood that the relevant features in the above methods and apparatus can be referenced interchangeably. Furthermore, the terms "first," "second," etc., in the above embodiments are used to distinguish between embodiments and do not represent the superiority or inferiority of any particular embodiment.

[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0081] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0082] In addition, the memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0083] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0084] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0085] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0086] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0087] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0088] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0089] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0090] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0091] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A temperature control method for an MR device, characterized in that, The method includes: Obtain the water supply temperature of the RFPA unit in the MR equipment; Determine whether the water supply temperature of the RFPA unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable operation requirements of the RFPA unit. If not, then control the normally open electric heater to remain on and the compensating electric heater to open and close intermittently; If so, then the normally open electric heater and the compensation electric heater shall be kept off. Controlling the continuous operation of the normally open electric heater and the intermittent opening and closing of the compensating electric heater includes: During the process of controlling the normally open electric heater to turn on, the percentage of heating demand corresponding to the water supply temperature of the RFPA unit is calculated based on a preset algorithm; The start-stop time of the compensating electric heater is determined according to the heating demand percentage, and the start-stop time is used to control the intermittent opening and closing of the compensating electric heater; Controlling the intermittent on / off of the compensating electric heater using the start / stop time includes: Obtain the heat load information of the RFPA unit in the MR device; The switching time point corresponding to the start-up and shutdown time is determined based on the heat load conditions; The intermittent opening and closing of the compensation electric heater is controlled based on the switching time point.

2. The method according to claim 1, characterized in that, Before controlling the normally open electric heater to be continuously turned on and compensating for the intermittent on / off of the electric heater, the method further includes: Detect whether the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature; If not, then control the normally open electric heater to remain on and the compensating electric heater to open and close intermittently; If so, the water supply temperature of the RFPA unit in the MR device is retrieved again.

3. The method according to claim 1, characterized in that, The percentage of heating demand corresponding to the water supply temperature of the RFPA unit is calculated based on a preset algorithm, including: The temperature difference is calculated by measuring the difference between the target temperature and the water supply temperature of the RFPA unit. PID calculation is performed on the temperature difference result to obtain the PID output value corresponding to the water supply temperature of the RFPA unit; The PID output value is used as the percentage of heating demand corresponding to the water supply temperature of the RFPA unit.

4. The method according to claim 1, characterized in that, The start-up and shutdown times of the compensating electric heater are determined based on the percentage of heating demand, and the intermittent on / off cycles of the compensating electric heater are controlled using these start-up and shutdown times, including: Obtain the pulse period corresponding to PWM pulse width modulation; The start-stop time of the compensating electric heater is calculated based on the pulse period and the heating demand percentage, and the start-stop time is used to control the intermittent opening and closing of the compensating electric heater.

5. The temperature control method for MR equipment according to claim 1, characterized in that, The temperature control device for MR equipment includes: The acquisition unit is used to acquire the water supply temperature of the RFPA unit in the MR equipment; The judgment unit is used to determine whether the water supply temperature of the RFPA unit in the MR device obtained by the acquisition unit is higher than the upper limit of the floating range corresponding to the target temperature. The floating range corresponding to the target temperature is used to characterize the temperature range that meets the stable working requirements of the RFPA unit. The first control unit is configured to control the normally open electric heater to continue to be turned on and the compensation electric heater to open and close intermittently if the judgment unit determines that the water supply temperature of the RFPA unit in the MR device is higher than the upper limit of the floating range corresponding to the target temperature. The second control unit is configured to control the normally open electric heater and the compensation electric heater to remain closed if the judgment unit determines that the water supply temperature of the RFPA unit in the MR device is not higher than the upper limit of the floating range corresponding to the target temperature.

6. The temperature control method for MR equipment according to claim 5, characterized in that, The temperature control device of the MR equipment also includes: The detection unit is used to detect, before the first control unit, whether the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature; The first control unit is specifically used for, If the detection unit detects that the water supply temperature of the RFPA unit is lower than the lower limit of the floating range corresponding to the target temperature, it controls the normally open electric heater to continue to be turned on and the compensation electric heater to open and close intermittently. The acquisition unit is specifically used for, If the detection unit detects that the water supply temperature of the RFPA unit is not lower than the lower limit of the floating range corresponding to the target temperature, then the water supply temperature of the RFPA unit in the MR device is re-acquired.

7. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the temperature control method of the MR device as described in any one of claims 1 to 4.

8. A processor, characterized in that, The processor is used to run a program, wherein the program executes the temperature control method of the MR device as described in any one of claims 1 to 4.

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