A microwave self-calibration system and microwave therapeutic instrument

Abstract

The utility model discloses a kind of microwave self-calibration system and microwave therapeutic instrument, belong to microwave therapeutic instrument field, considering that self-calibration of microwave output power can be realized in the operation process of microwave therapeutic instrument by closed-loop control principle, therefore, microwave self-calibration system is designed based on closed-loop control principle in the utility model, the sampling value of the microwave output power of microwave generating device can be sampled by microwave sensing device, and the deviation determining device can determine the deviation of the sampling value relative to the current power setting value of the microwave output power, so that the control device can carry out electric energy conversion control on power module according to the deviation, so that the sampling value approaches power setting value, based on this, without complex calibration work on the microwave output power of microwave therapeutic instrument in production stage, in use stage, the microwave output power precision of microwave therapeutic instrument can also be kept high precision for a long time.

Description

Technical Field

[0001] This utility model relates to the field of microwave therapy devices, and in particular to a microwave self-calibration system and a microwave therapy device. Background Technology

[0002] Microwave therapy devices can achieve microwave therapy by generating microwaves, and the microwave output power can be adjusted during use to control the intensity of the treatment. However, in related technologies, not only is it necessary to perform complex calibration work on the microwave output power of microwave therapy devices during the production stage, but also during the use stage, the accuracy of microwave output power may decrease due to factors such as the accumulation of use time.

[0003] Therefore, how to provide a solution to the above-mentioned technical problems is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a microwave self-calibration system and a microwave therapy device. The microwave sensor can sample the microwave output power of the microwave generating device, and the deviation determination device can determine the deviation of the sampled value from the current power setting value of the microwave output power. This allows the control device to control the power module to convert electrical energy according to the deviation, so that the sampled value approaches the power setting value. Based on this, there is no need to perform complex calibration work on the microwave output power of the microwave therapy device during the production stage, and the microwave output power accuracy of the microwave therapy device can also maintain high accuracy for a long time during the use stage.

[0005] To solve the above-mentioned technical problems, this utility model provides a microwave self-calibration system, including a microwave sensing device, a deviation determination device, and a control device;

[0006] The microwave sensing device is connected to the output terminal of the microwave generating device in the microwave therapy instrument, and is used to sample and obtain the sampled value of the microwave output power of the microwave generating device.

[0007] The deviation determination device is connected to both the microwave sensing device and the control device, and is used to determine the deviation of the sampled value from the current power setting value of the microwave output power sent by the control device.

[0008] The control device is connected to the deviation determination device and the power module in the microwave therapy device, respectively, and is used to control the power module to perform power conversion according to the deviation, so that the sampled value approaches the power set value.

[0009] The microwave therapy device includes a power supply module and a microwave generating device. The power supply module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of a corresponding power.

[0010] On the other hand, the deviation determination device includes a conversion device and a calculation device;

[0011] The conversion device is connected to the control device and the computing device respectively, and is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage;

[0012] The computing device is connected to both the microwave sensing device and the control device to determine the deviation of the sampled value from the power set value in analog form.

[0013] On the other hand, the conversion device includes:

[0014] The conversion module connected to the control device is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage.

[0015] A first amplification module, which is connected to both the conversion module and the computing device, is used to amplify the analog power setting value.

[0016] On the other hand, the conversion module includes:

[0017] A reference voltage source connected to the digital-to-analog converter chip is used to provide a reference voltage;

[0018] The digital-to-analog converter chip connected to the control device is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage.

[0019] On the other hand, the computing device includes:

[0020] A subtraction module, connected to the microwave sensing device and the conversion device respectively, is used to determine the deviation of the sampled value from the power set value in analog form;

[0021] A second amplification module, connected to both the subtraction module and the control device, is used to amplify the deviation.

[0022] On the other hand, the subtraction module includes a first operational amplifier.

[0023] On the other hand, the second amplification module includes a second operational amplifier, a first resistor, and a second resistor;

[0024] The first input terminal of the second operational amplifier is connected to the output terminal of the subtraction module, the second input terminal of the second operational amplifier is connected to the first terminal of the first resistor and the first terminal of the second resistor respectively, the second terminal of the second resistor is grounded, and the first terminal of the first resistor is connected to the output terminal of the second operational amplifier and the control device respectively.

[0025] On the other hand, the first amplification module includes a third operational amplifier, a third resistor, and a fourth resistor;

[0026] The first input terminal of the third operational amplifier is connected to the output terminal of the conversion module. The second input terminal of the third operational amplifier is connected to the first terminal of the third resistor and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor is grounded. The first terminal of the third resistor is connected to the output terminal of the third operational amplifier and the operational device, respectively.

[0027] On the other hand, the microwave self-calibration system also includes:

[0028] An alarm device connected to the control device is used to issue an alarm when the deviation exceeds the standard for an extended period, under the control of the control device.

[0029] To solve the above-mentioned technical problems, this utility model also provides a microwave therapy device, including a power supply module and a microwave generating device;

[0030] The power module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of a corresponding power.

[0031] It also includes a microwave self-calibration system, as described above, which is connected to the power module and the microwave generating device respectively.

[0032] Beneficial Effects: This utility model provides a microwave self-calibration system. Considering that the microwave output power can be self-calibrated during the operation of a microwave therapy device through closed-loop control, this utility model designs a microwave self-calibration system based on the closed-loop control principle. The microwave sensor can sample the microwave output power of the microwave generating device, and the deviation determination device can determine the deviation of the sampled value from the current power setting value of the microwave output power. This allows the control device to control the power module's power conversion based on the deviation, so that the sampled value approaches the power setting value. Based on this, there is no need to perform complex calibration work on the microwave output power of the microwave therapy device during the production stage, and the microwave output power accuracy of the microwave therapy device can also maintain high accuracy for a long time during the use stage.

[0033] This invention also provides a microwave therapy device that has the same beneficial effects as the microwave self-calibration system described above. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the relevant technologies and the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the structure of a microwave self-calibration system provided by this utility model;

[0036] Figure 2 A schematic diagram of the structure of a conversion device provided by this utility model;

[0037] Figure 3 This is a schematic diagram of the structure of a computing device provided by this utility model. Detailed Implementation

[0038] The core of this invention is to provide a microwave self-calibration system and a microwave therapy device. The microwave sensor can sample the microwave output power of the microwave generating device, and the deviation determination device can determine the deviation of the sampled value from the current power setting value of the microwave output power. This allows the control device to control the power module to convert electrical energy according to the deviation, so that the sampled value approaches the power setting value. Based on this, there is no need to perform complex calibration work on the microwave output power of the microwave therapy device during the production stage, and the microwave output power accuracy of the microwave therapy device can also maintain high accuracy for a long time during the use stage.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a microwave self-calibration system provided by the present invention. The microwave self-calibration system includes a microwave sensing device 1, a deviation determination device 2, and a control device 3.

[0041] The microwave sensing device 1 is connected to the output terminal of the microwave generating device in the microwave therapy instrument, and is used to sample and obtain the sampled value of the microwave output power of the microwave generating device.

[0042] The deviation determination device 2 is connected to the microwave sensing device 1 and the control device 3 respectively, and is used to determine the deviation of the sampled value from the current power setting value of the microwave output power sent by the control device 3.

[0043] The control device 3 is connected to the deviation determination device 2 and the power module in the microwave therapy device, respectively, and is used to control the power module to convert electrical energy according to the deviation, so that the sampled value approaches the power set value.

[0044] The microwave therapy device includes a power supply module and a microwave generating device. The power supply module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of a corresponding power.

[0045] Specifically, considering the technical problems mentioned above, and taking into account that the microwave output power can be self-calibrated during the operation of a microwave therapy device through closed-loop control, this utility model aims to design a microwave self-calibration system based on closed-loop control. This system can obtain the sampled value of the microwave output power of the microwave generating device through the microwave sensor 1 during the operation of the microwave therapy device. This is feedback of real data, reflecting the control effect. The control device 3 can send the current power setting value of the microwave output power to the deviation determination device 2, which is the control target. The deviation determination device 2 can then determine the deviation of the sampled value relative to the current power setting value of the microwave output power. The control device 3 can ultimately control the power conversion of the power module based on this deviation, so that the sampled value approaches the power setting value, thereby achieving a complete closed-loop control of the microwave output power. This system can sample and adjust the microwave output power in real time, maintaining high accuracy of the microwave output power.

[0046] Specifically, the microwave sensing device 1 can be of various types, such as a "directional coupler and power sensor scheme". The core principle is to couple part of the power from the microwave transmission path through the directional coupler, and then convert the microwave power into an electrical signal (such as voltage or current) by the power sensor to obtain the sampled value; or it can be a "resistance attenuation and detector-based scheme". The core principle is to reduce the microwave power to a safe range through a resistance attenuation network, and then use a detector to convert the high-frequency signal into a low-frequency or DC signal for easy subsequent processing. This utility model embodiment is not limited here.

[0047] In this process, the deviation is determined by the deviation determination device 2 located outside the control device 3 and then sent to the control device 3 for processing. The deviation can be quickly determined by the hardware of the deviation determination device 2, which helps to reduce processing efficiency and reduce the cost of the control device 3.

[0048] The microwave generating device in the microwave therapy device can be of various types, such as a magnetron, and this embodiment of the present invention does not limit the specific type.

[0049] Specifically, after using this microwave self-calibration system, the long-term stability of the microwave output power of the microwave therapy device can be controlled within 5%. Table 1 below is a comparison table of the power stability of two microwave therapy devices. Both microwave therapy devices were calibrated before the test, and the calibration error was within 1%. However, during use, only one device used the microwave self-calibration system for self-correction. After working for 1 hour, the microwave output power of the two microwave therapy devices, one using the microwave self-calibration system and the other not, is shown in Table 1 below.

[0050] Table 1

[0051]

[0052] This invention provides a microwave self-calibration system. Considering that the microwave output power can be self-calibrated during the operation of a microwave therapy device through closed-loop control, this invention designs a microwave self-calibration system based on the closed-loop control principle. The microwave sensor can sample the microwave output power of the microwave generating device, and the deviation determination device can determine the deviation of the sampled value from the current power setting value of the microwave output power. This allows the control device to perform power conversion control on the power module based on the deviation, so that the sampled value approaches the power setting value. Based on this, there is no need to perform complex calibration work on the microwave output power of the microwave therapy device during the production stage, and the microwave output power accuracy of the microwave therapy device can also maintain high accuracy for a long time during the use stage.

[0053] Based on the above embodiments:

[0054] As an optional embodiment, the deviation determination device 2 includes a conversion device and a calculation device;

[0055] The conversion device is connected to the control device 3 and the computing device respectively, and is used to convert the current power setting value of the microwave output power sent by the control device 3 from digital form to analog form based on the reference voltage;

[0056] The computing device is connected to the microwave sensing device 1 and the control device 3 respectively, and is used to determine the deviation of the sampled value from the power setting value in analog form.

[0057] Specifically, considering that the sampled values ​​obtained by the microwave sensing device 1 are usually analog signals, in order to directly use the analog sampled signals to determine the deviation, the conversion device in this embodiment of the present invention can convert the current power setting value of the microwave output power sent by the control device 3 from digital form to analog form based on the reference voltage, so that the computing device can directly process the "sampled values ​​and power setting values" which are all in analog form to obtain the deviation.

[0058] As an optional embodiment, the conversion device includes:

[0059] The conversion module connected to the control device 3 is used to convert the current power setting value of the microwave output power sent by the control device 3 from digital form to analog form based on the reference voltage.

[0060] The first amplification module, which is connected to the conversion module and the computing device respectively, is used to amplify the analog power setting value.

[0061] Specifically, for a better explanation of the embodiments of this utility model, please refer to... Figure 2 , Figure 2 This is a schematic diagram of the structure of a conversion device provided by this utility model.

[0062] Specifically, considering that the analog power setting value obtained by the conversion module may not match the sampled value in amplitude and cannot be used by the computing device to determine the deviation, in this embodiment of the utility model, the analog power setting value can be amplified by the first amplification module, so that the computing device can directly use the power setting value and the sampled value to calculate the deviation.

[0063] As an optional embodiment, the conversion module includes:

[0064] A reference voltage source connected to the digital-to-analog converter chip is used to provide a reference voltage;

[0065] The digital-to-analog converter chip connected to the control device 3 is used to convert the current power setting value of the microwave output power sent by the control device 3 from digital form to analog form based on the reference voltage.

[0066] Specifically, considering that the analog-to-digital converter chip itself can complete the conversion from digital to analog form, the conversion module in this embodiment of the present invention includes an analog-to-digital converter chip and a reference voltage source, so that the analog-to-digital converter chip can convert the current power setting value of the microwave output power sent by the control device 3 from digital form to analog form based on the reference voltage. The analog-to-digital converter chip has the advantages of small size, low cost and long life.

[0067] in, Figure 2The diagram shows the digital-to-analog converter chip and the reference voltage source. The power setting value input to the digital-to-analog converter chip is in digital form.

[0068] Of course, in addition to analog-to-digital converter chips, conversion modules can be of many other types, and this embodiment of the present invention does not limit them.

[0069] As an optional embodiment, the computing device includes:

[0070] The subtraction module, which is connected to the microwave sensing device 1 and the conversion device respectively, is used to determine the deviation of the sampled value from the power set value in analog form;

[0071] The second amplification module, which is connected to both the subtraction module and the control device 3, is used to amplify the deviation.

[0072] Specifically, for a better explanation of the embodiments of this utility model, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the structure of a computing device provided by this utility model.

[0073] Specifically, considering that the subtraction module can determine the deviation of the sampled value from the analog power setting value, and has the advantages of small size and low cost, and also considering that the deviation determined by the subtraction module may be too small to be directly used by the control device 3, the computing device in this embodiment of the utility model includes a subtraction module and a second amplification module. On the one hand, the subtraction module can determine the deviation of the sampled value from the analog power setting value, and on the other hand, the second amplification module can amplify the deviation, so as to facilitate the transmission of the amplified deviation to the control device 3 for processing.

[0074] Of course, in addition to this specific form, the computing device can also take many other forms, and this embodiment of the present invention does not limit it.

[0075] As an optional embodiment, the subtraction module includes a first operational amplifier.

[0076] Specifically, operational amplifiers have advantages such as small size, low cost, and long lifespan.

[0077] in, Figure 3 IC1 is the first operational amplifier, and its inputs include the sampled value and the power setting value.

[0078] Of course, in addition to operational amplifiers, subtraction modules can be of many other types, and this embodiment of the present invention does not limit them.

[0079] As an optional embodiment, the second amplification module includes a second operational amplifier, a first resistor, and a second resistor;

[0080] The first input terminal of the second operational amplifier is connected to the output terminal of the subtraction module. The second input terminal of the second operational amplifier is connected to the first terminal of the first resistor and the first terminal of the second resistor, respectively. The second terminal of the second resistor is grounded. The first terminal of the first resistor is connected to the output terminal of the second operational amplifier and the control device 3, respectively.

[0081] Specifically, the second amplification module in this embodiment of the present invention consists of a single operational amplifier and two resistors, and has the advantages of simple structure, low cost and long life.

[0082] in, Figure 3 IC2 is the second operational amplifier, R1 is the first resistor, R2 is the second resistor, and the output of the second operational amplifier is the deviation.

[0083] Of course, besides this specific structure, the second amplification module can also be of many other types, and this embodiment of the present invention does not limit it.

[0084] As an optional embodiment, the first amplification module includes a third operational amplifier, a third resistor, and a fourth resistor;

[0085] The first input terminal of the third operational amplifier is connected to the output terminal of the conversion module. The second input terminal of the third operational amplifier is connected to the first terminal of the third resistor and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor is grounded. The first terminal of the third resistor is connected to the output terminal of the third operational amplifier and the operational device, respectively.

[0086] Specifically, the first amplification module in this embodiment of the present invention consists of a single operational amplifier and two resistors, and has the advantages of simple structure, low cost and long life.

[0087] in, Figure 2 IC3 is the third operational amplifier, R3 is the third resistor, and R4 is the fourth resistor. The output of the third operational amplifier is the analog power setting value.

[0088] Of course, besides this specific structure, the first amplification module can also be of many other types, and this embodiment of the present invention does not limit it.

[0089] As an optional embodiment, the microwave self-calibration system further includes:

[0090] An alarm device connected to the control device 3 is used to issue an alarm when the deviation exceeds the standard for an extended period, under the control of the control device 3.

[0091] Specifically, considering that in certain special circumstances, such as the failure of certain components in the microwave self-calibration system, the deviation may not be reduced and may remain in a state of long-term excess, the microwave output power may deviate significantly from the power setting value, which may reduce the therapeutic effect or even cause medical accidents. Therefore, in order to avoid this situation, the alarm device in this embodiment of the present invention can, under the control of the control device 3, issue an alarm when the deviation exceeds the standard for a long period of time.

[0092] The alarm device can be of various types, such as a buzzer or a voice announcer, and this embodiment of the present invention is not limited thereto.

[0093] This utility model also provides a microwave therapy device, including a power supply module and a microwave generating device;

[0094] The power module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of the corresponding power.

[0095] It also includes the microwave self-calibration system described above, which is connected to the power module and the microwave generating device respectively.

[0096] For a description of the microwave therapy device provided in this utility model embodiment, please refer to the aforementioned embodiment of the microwave self-calibration system; the embodiment of this utility model will not be repeated here.

[0097] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, 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.

[0098] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microwave self-calibration system, characterized in that, Includes microwave sensing devices, deviation determination devices, and control devices; The microwave sensing device is connected to the output terminal of the microwave generating device in the microwave therapy instrument, and is used to sample and obtain the sampled value of the microwave output power of the microwave generating device. The deviation determination device is connected to both the microwave sensing device and the control device, and is used to determine the deviation of the sampled value from the current power setting value of the microwave output power sent by the control device. The control device is connected to the deviation determination device and the power module in the microwave therapy device, respectively, and is used to control the power module to perform power conversion according to the deviation, so that the sampled value approaches the power set value. The microwave therapy device includes a power supply module and a microwave generating device. The power supply module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of a corresponding power.

2. The microwave self-calibration system according to claim 1, characterized in that, The deviation determination device includes a conversion device and a calculation device; The conversion device is connected to the control device and the computing device respectively, and is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage; The computing device is connected to both the microwave sensing device and the control device to determine the deviation of the sampled value from the power set value in analog form.

3. The microwave self-calibration system according to claim 2, characterized in that, The conversion device includes: The conversion module connected to the control device is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage. A first amplification module, which is connected to both the conversion module and the computing device, is used to amplify the analog power setting value.

4. The microwave self-calibration system according to claim 3, characterized in that, The conversion module includes: A reference voltage source connected to the digital-to-analog converter chip is used to provide a reference voltage; The digital-to-analog converter chip connected to the control device is used to convert the current power setting value of the microwave output power sent by the control device from digital form to analog form based on the reference voltage.

5. The microwave self-calibration system according to claim 2, characterized in that, The computing device includes: A subtraction module, connected to the microwave sensing device and the conversion device respectively, is used to determine the deviation of the sampled value from the power set value in analog form; A second amplification module, connected to both the subtraction module and the control device, is used to amplify the deviation.

6. The microwave self-calibration system according to claim 5, characterized in that, The subtraction module includes a first operational amplifier.

7. The microwave self-calibration system according to claim 5, characterized in that, The second amplification module includes a second operational amplifier, a first resistor, and a second resistor; The first input terminal of the second operational amplifier is connected to the output terminal of the subtraction module, the second input terminal of the second operational amplifier is connected to the first terminal of the first resistor and the first terminal of the second resistor respectively, the second terminal of the second resistor is grounded, and the first terminal of the first resistor is connected to the output terminal of the second operational amplifier and the control device respectively.

8. The microwave self-calibration system according to claim 3, characterized in that, The first amplification module includes a third operational amplifier, a third resistor, and a fourth resistor; The first input terminal of the third operational amplifier is connected to the output terminal of the conversion module. The second input terminal of the third operational amplifier is connected to the first terminal of the third resistor and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor is grounded. The first terminal of the third resistor is connected to the output terminal of the third operational amplifier and the operational device, respectively.

9. The microwave self-calibration system according to any one of claims 1 to 8, characterized in that, The microwave self-calibration system also includes: An alarm device connected to the control device is used to issue an alarm when the deviation exceeds the standard for an extended period, under the control of the control device.

10. A microwave therapy device, characterized in that, Includes power supply modules and microwave generating devices; The power module is used to controllably convert AC power into DC power of a specified power and then supply it to the microwave generating device so that the microwave generating device can generate microwave energy of a corresponding power. It also includes a microwave self-calibration system as described in any one of claims 1 to 9, which is connected to the power module and the microwave generating device respectively.

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