Nuclear magnetic resonance measurement device and system
Through the combination of DDS chip and low-pass filter, high-resolution and high-bandwidth RF signals are generated, which solves the problems of low resolution and narrow bandwidth of RF signals in NMR frequency measurement, and improves the measurement accuracy and imaging quality of NMR signals .
Patent Information
- Application Number
- CN202323436223.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-15
AI Technical Summary
In the measurement of NMR frequency, the low resolution and narrow bandwidth of the RF signal lead to a decrease in measurement accuracy, and the inability to obtain accurate NMR signals and the problem of degradation of NMR imaging quality.
Use the DDS chip to generate high-resolution, high bandwidth RF signals, and improve the accuracy of the RF signals through the first low-pass filter and the second low-pass filter, ensure the accuracy of the signal received by the probe, and thus improve the nuclear magnetic resonance signal. measurement accuracy and imaging quality.
Through high-resolution and high bandwidth RF signal processing, accurate NMR signal measurement is achieved and the quality of NMR imaging is improved, solving the problems of measurement accuracy and imaging quality.
Smart Images
Figure CN222167118U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of nuclear magnetic resonance measurement, in particular to a nuclear magnetic resonance measurement device and system. Background Art
[0002] In the measurement of nuclear magnetic resonance frequency, a radio frequency signal is needed to hit the measuring probe. If the frequency of the radio frequency signal is consistent with the frequency of the probe magnetic field, the probe will generate a freely decaying nuclear magnetic resonance signal. The nuclear magnetic resonance frequency can be calculated by sampling the probe signal. During the entire measurement process, the probe needs to be swept, sampled, and calculated with radio frequency signals of different frequencies until a nuclear magnetic resonance frequency is obtained. During the transmission and reception of radio frequency signals, the problem of reduced measurement accuracy due to the low resolution and narrow bandwidth of the transmitted radio frequency signal will be faced, resulting in the inability to obtain accurate nuclear magnetic resonance signals and the appearance of reduced quality of nuclear magnetic resonance imaging. Utility Model Content
[0003] The purpose of the utility model is to provide a nuclear magnetic resonance measurement device and system. The DDS chip provided in the present scheme can generate a high-resolution, high-bandwidth radio frequency signal, and improve the accuracy of the radio frequency signal through filtering by a first low-pass filter, thereby obtaining a precise nuclear magnetic resonance signal, and improving the measurement accuracy of the nuclear magnetic resonance signal and the quality of nuclear magnetic resonance imaging.
[0004] In order to solve the above technical problems, the utility model provides a nuclear magnetic resonance measurement device, comprising: a DDS chip, a first low-pass filter, a first amplifier device, a mixer, and a second low-pass filter;
[0005] The DDS chip, the input end of the DDS chip is connected to the MCU, and the output end is connected to the input end of the first low-pass filter, and is used to output a corresponding radio frequency signal based on the control of the MCU;
[0006] The first low-pass filter, the output end of which is connected to the first amplifier device, is used to filter out high-frequency components in the radio frequency signal;
[0007] The first amplifier device, the output end of which is respectively connected to the input end of the probe and the input end of the mixer, is used to amplify the received filtered radio frequency signal and transmit the amplified radio frequency signal to the probe and the mixer respectively;
[0008] The mixer, the input end of which is connected to the output end of the probe, is used to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe;
[0009] The second low-pass filter, the input end of the second low-pass filter is connected to the output end of the mixer, and the output end is connected to the MCU, and is used to filter out the amplified RF signal in the mixed signal transmitted by the mixer, and transmit the nuclear magnetic resonance signal in the mixed signal to the MCU.
[0010] Optionally, also include:
[0011] A second amplifier device, wherein the input end of the second amplifier device is connected to the output end of the probe, and the output end of the second amplifier device is connected to the input end of the mixer, and is used for amplifying the nuclear magnetic resonance signal emitted by the probe and transmitting the amplified nuclear magnetic resonance signal to the mixer.
[0012] Optionally, also include:
[0013] A radio frequency switch, wherein the input end of the radio frequency switch is connected to the output end of the first amplifier device, the first output end is connected to the input end of the probe, the second output end is connected to the input end of the mixer, and the control end is connected to the MCU, and is used to transmit the amplified radio frequency signal to the probe or the mixer based on the control of the MCU.
[0014] Optionally, the mixer is a passive mixer, the input end of the passive mixer is respectively connected to the output end of the probe and the output end of the first amplifier device, and is used to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe.
[0015] Optionally, also include:
[0016] A third amplifier device, wherein the input end of the third amplifier device is connected to the output end of the second low-pass filter, and the output end of the third amplifier device is connected to the MCU, and is used for amplifying the nuclear magnetic resonance signal in the mixed signal, and transmitting the amplified nuclear magnetic resonance signal in the mixed signal to the MCU.
[0017] Optionally, also include:
[0018] A data processing module, wherein the input end of the data processing module is connected to the output end of the second low-pass filter, and the output end is connected to the MCU, and is used to perform analog-to-digital conversion processing on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion processing to the MCU.
[0019] Optionally, the data processing module is an ADC, the input end of the ADC is connected to the output end of the second low-pass filter, and the output end is connected to the MCU, for performing analog-to-digital conversion on the nuclear magnetic resonance signal in the mixed signal, and transmitting the digital signal generated after the analog-to-digital conversion to the MCU.
[0020] Optionally, also include:
[0021] A data storage module, wherein the input end of the data storage module is connected to the output end of the data processing module, and the output end is connected to the MCU, and is used to store the digital signal and enable the MCU to read the digital signal in the storage in real time.
[0022] Optionally, the data storage module is a FIFO, the input end of the FIFO is connected to the output end of the data processing module, and the output end is connected to the MCU, and is used to store the digital signal and enable the MCU to read the digital signal in the storage in real time.
[0023] In order to solve the above technical problems, the utility model also provides a nuclear magnetic resonance measurement system, including an MCU and the nuclear magnetic resonance measurement device as described above, wherein the MCU is connected to the nuclear magnetic resonance measurement device.
[0024] In order to solve the above technical problems, the utility model further provides an electronic device, comprising a housing and the nuclear magnetic resonance measurement system as described above, wherein the nuclear magnetic resonance measurement system is arranged inside the housing.
[0025] The utility model provides a nuclear magnetic resonance measurement device and system. A DDS chip generates a radio frequency signal under the control of an MCU, and sequentially filters the radio frequency signal through a first low-pass filter and amplifies the signal through a first amplifier, and transmits the amplified radio frequency signal to a probe and a mixer, respectively, so that the mixer performs mixing according to the nuclear magnetic resonance signal and the radio frequency signal received from the probe. The second low-pass filter filters out the radio frequency signal in the mixed signal transmitted by the mixer, and transmits the filtered nuclear magnetic resonance signal to the MCU, so that the MCU performs accurate calculation according to the nuclear magnetic resonance signal. The DDS chip provided in the present scheme generates a high-resolution, high-bandwidth radio frequency signal, and improves the accuracy of the radio frequency signal through filtering by the first low-pass filter, thereby obtaining a precise nuclear magnetic resonance signal, and improving the measurement accuracy of the nuclear magnetic resonance signal and the quality of nuclear magnetic resonance imaging. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0027] Figure 1 A schematic diagram of the structure of a nuclear magnetic resonance measurement device provided by the utility model;
[0028] Figure 2 This is a schematic structural diagram of another nuclear magnetic resonance measurement device provided by the utility model. DETAILED DESCRIPTION
[0029] The core of the utility model is to provide a nuclear magnetic resonance measurement device and system. The DDS chip set in this scheme can generate a high-resolution, high-bandwidth radio frequency signal, and improve the accuracy of the radio frequency signal through filtering by a first low-pass filter, thereby obtaining a precise nuclear magnetic resonance signal, and improving the measurement accuracy of the nuclear magnetic resonance signal and the quality of nuclear magnetic resonance imaging.
[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a nuclear magnetic resonance measurement device provided by the utility model. The device includes: a DDS chip 1, a first low-pass filter 2, a first amplifier device 3, a mixer 4, and a second low-pass filter 5;
[0032] DDS chip 1, the input end of the DDS chip 1 is connected to the MCU, and the output end is connected to the input end of the first low-pass filter 2, and is used to output a corresponding radio frequency signal based on the control of the MCU;
[0033] A first low-pass filter 2, the output end of which is connected to the first amplifier device 3, and is used to filter out high-frequency components in the radio frequency signal;
[0034] A first amplifier 3, the output end of which is respectively connected to the input end of the probe and the input end of the mixer 4, for amplifying the received filtered radio frequency signal, and transmitting the amplified radio frequency signal to the probe and the mixer 4 respectively;
[0035] A mixer 4, the input end of which is connected to the output end of the probe, and is used to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe;
[0036] The second low-pass filter 5 has an input end connected to the output end of the mixer 4, and an output end connected to the MCU, and is used to filter out the amplified RF signal in the mixed signal transmitted by the mixer 4, and transmit the nuclear magnetic resonance signal in the mixed signal to the MCU.
[0037] In the utility model, in order to realize nuclear magnetic resonance measurement, the DDS (Direct Digital Synthesis) chip 1 needs to output the corresponding radio frequency signal based on the control of the MCU (Micro Controller Unit), and because of the characteristics of the DDS chip 1 itself, the output radio frequency signal is a high-resolution, high-bandwidth radio frequency signal. In addition, the first low-pass filter 2 will filter the radio frequency signal after receiving it to filter out the high-frequency components in the radio frequency signal, and transmit the filtered radio frequency signal to the first amplifier 3, and amplify the filtered radio frequency signal through the action of the first amplifier 3, and transmit the amplified radio frequency signal to the probe and the mixer 4 respectively, wherein the probe will emit the corresponding nuclear magnetic resonance signal to the mixer 4 after receiving the amplified radio frequency signal transmitted by the first amplifier 3, and the mixer 4 will transmit the amplified radio frequency signal to the probe and the mixer 4 respectively. The mixer 4 mixes the amplified RF signal and the nuclear magnetic resonance signal emitted by the probe, and transmits the mixed signal to the second low-pass filter 5 for filtering to filter out the amplified RF signal in the mixed signal transmitted by the mixer 4, and transmits the nuclear magnetic resonance signal in the mixed signal to the MCU, so that the MCU completes the nuclear magnetic resonance detection according to the processed nuclear magnetic resonance signal, because the DDS chip 1 set in this scheme can generate a high-resolution, high-bandwidth RF signal, and the first low-pass filter 2 can filter out the high-frequency components in the RF signal, thereby obtaining an accurate nuclear magnetic resonance signal, and improving the measurement accuracy of the nuclear magnetic resonance signal and the quality of nuclear magnetic resonance imaging.
[0038] It should be noted that how to improve the resolution and bandwidth of the transmission frequency, increase the bandwidth of the received signal, reduce the difficulty of signal processing, and increase the measurement speed without losing the measurement accuracy are problems that need to be solved and optimized. In the face of the above problems, the measurement device of the utility model solves them through the following points: 1) The transmission signal adopts a high-resolution, high-bandwidth direct digital frequency synthesizer (DDS); 2) The receiving signal adopts a passive mixer 4 that supports a wide range. It only needs to change the probe of different nuclear magnetic resonance to input into the device. The nuclear magnetic resonance signal generates a digital signal through an analog-to-digital converter (ADC) and is collected and stored by a FIFO (First In First Out). The MCU reads the FIFO data and then transmits it to a PC (Personal Computer).
[0039] It should also be noted that the advantages of this application are as follows: 1. It transmits high-resolution, high-bandwidth, high-speed signals, is simple to control, and has low cost. 2. It receives a wide range of nuclear magnetic resonance signals, improves scalability, and the lower computer is responsible for data storage and transportation, simplifies signal processing difficulty, and reduces costs. 3. The upper computer is responsible for processing the Fourier transform of the nuclear magnetic resonance signal, which is highly efficient and simple and fast to calculate.
[0040] The present embodiment provides a nuclear magnetic resonance measurement device, the DDS chip 1 generates a radio frequency signal under the control of the MCU, and sequentially transmits the amplified radio frequency signal to the probe and the mixer 4 respectively through filtering by the first low-pass filter 2 and amplification by the first amplifier 3, so that the mixer 4 performs mixing according to the nuclear magnetic resonance signal and the radio frequency signal received from the probe, the second low-pass filter 5 filters out the radio frequency signal in the mixed signal transmitted by the mixer 4, and transmits the filtered nuclear magnetic resonance signal to the MCU, so that the MCU performs accurate calculation according to the nuclear magnetic resonance signal, the DDS chip 1 set in the present scheme generates a high-resolution, high-bandwidth radio frequency signal, and improves the accuracy of the radio frequency signal through filtering by the first low-pass filter 2, thereby obtaining a precise nuclear magnetic resonance signal, and improving the measurement accuracy of the nuclear magnetic resonance signal and the quality of nuclear magnetic resonance imaging.
[0041] Based on the above embodiments:
[0042] As an optional embodiment, it also includes:
[0043] The second amplifier device 6 has an input end connected to the output end of the probe, and an output end connected to the input end of the mixer 4, and is used to amplify the nuclear magnetic resonance signal emitted by the probe and transmit the amplified nuclear magnetic resonance signal to the mixer 4.
[0044] In the utility model, a second amplifier device 6 is also provided in the nuclear magnetic resonance measuring device, and the function of the second amplifier device 6 is to amplify the nuclear magnetic resonance signal emitted by the probe and transmit the amplified nuclear magnetic resonance signal to the mixer 4, thereby improving the accuracy and reliability of the process of the mixer 4 receiving the nuclear magnetic resonance signal.
[0045] As an optional embodiment, it also includes:
[0046] The RF switch 7 has an input end connected to the output end of the first amplifier device 3, a first output end connected to the input end of the probe, a second output end connected to the input end of the mixer 4, and a control end connected to the MCU, for transmitting the amplified RF signal to the probe or the mixer 4 based on the control of the MCU.
[0047] In the utility model, a radio frequency switch 7 is also provided in the nuclear magnetic resonance measuring device, and the function of the radio frequency switch 7 is to transmit the amplified radio frequency signal to the probe or the mixer 4 based on the control of the MCU. Because the transmission of the amplified radio frequency signal is controlled by the controller, the process of transmitting the amplified radio frequency signal to the mixer 4 and the process of transmitting the nuclear magnetic resonance signal to the mixer 4 can be carried out accurately, which is convenient for the mixer 4 to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe.
[0048] As an optional embodiment, the mixer 4 is a passive mixer, the input end of which is respectively connected to the output end of the probe and the output end of the first amplifier device 3, and is used to mix the amplified RF signal and the nuclear magnetic resonance signal emitted by the probe.
[0049] In the present invention, the mixer 4 is a passive mixer. The advantage of a passive mixer is that the bandwidth range of the received signal is large, so the success rate of receiving the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe can be improved, and the stability of the nuclear magnetic resonance measurement process is improved.
[0050] As an optional embodiment, it also includes:
[0051] A third amplifier device 8, wherein the input end of the third amplifier device 8 is connected to the output end of the second low-pass filter 5, and the output end is connected to the MCU, and is used to amplify the nuclear magnetic resonance signal in the mixed signal and transmit the amplified nuclear magnetic resonance signal in the mixed signal to the MCU.
[0052] As an optional embodiment, it also includes:
[0053] The data processing module 9 has an input end connected to the output end of the second low-pass filter 5, and an output end connected to the MCU, and is used to perform analog-to-digital conversion on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion to the MCU.
[0054] In the utility model, a data processing module 9 is also provided in the nuclear magnetic resonance measurement device. The data processing module 9 is arranged before the MCU and the second low-pass filter 5. The function of the data processing module 9 is to perform analog-to-digital conversion processing on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion processing to the MCU. There is no need for the MCU to perform digital-to-analog conversion operations, thereby reducing the workload of the MCU and improving the speed of the nuclear magnetic resonance measurement process.
[0055] As an optional embodiment, the data processing module 9 is an ADC, the input end of the ADC is connected to the output end of the second low-pass filter 5, and the output end is connected to the MCU, and is used to perform analog-to-digital conversion on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion to the MCU.
[0056] In the present invention, the data processing module 9 is an ADC, and the advantages of the ADC are low design difficulty and high calculation speed.
[0057] As an optional embodiment, it also includes:
[0058] The data storage module 10 has an input end connected to the output end of the data processing module 9 and an output end connected to the MCU, and is used to store digital signals and enable the MCU to read the stored digital signals in real time.
[0059] In the utility model, a data storage module 10 is also provided in the nuclear magnetic resonance measuring device. After the data processing module 9 performs analog-to-digital conversion processing on the nuclear magnetic resonance signal in the mixed signal, the data storage module 10 will receive the digital signal transmitted by the data processing module 9, and store the received digital signal. At the same time, the MCU will read the digital signal in the storage in real time, thereby increasing the storage process of the digital signal to prevent the problem that the digital signal cannot be obtained due to the need to verify the digital signal due to special reasons, and the MCU has no storage module or the internal storage module is damaged, thereby facilitating the user's query on the digital signal.
[0060] As an optional embodiment, the data storage module 10 is a FIFO, the input end of the FIFO is connected to the output end of the data processing module 9, and the output end is connected to the MCU, and is used to store digital signals and enable the MCU to read the stored digital signals in real time.
[0061] In the present invention, the data storage module 10 is a FIFO. The advantages of FIFO are low design difficulty and high storage speed.
[0062] It should be noted that, in actual applications, the measurement process of the nuclear magnetic resonance measurement device provided by the present application is as follows: the MCU is connected to the DDS through a parallel data line, the signal output by the DDS is filtered out after the high-frequency signal is output through a low-pass filter, the radio frequency signal is amplified by the radio frequency amplifier and connected to the probe through the radio frequency switch 7, the MCU controls the radio frequency switch 7 through the TG (Tracking Generator) signal to switch the output radio frequency signal to the mixer 4, the nuclear magnetic resonance signal generated by the probe is input into the radio frequency amplifier to amplify the signal and input into the mixer 4 to mix with the radio frequency signal to obtain a nuclear magnetic resonance signal and a 2-fold radio frequency signal, and then the signal is high-frequency filtered through a low-pass filter to filter out the 2-fold radio frequency signal, the obtained nuclear magnetic resonance signal is input into the intermediate frequency amplifier to amplify the signal again by a certain proportion so that the signal has a higher signal-to-noise ratio, the ADC collects the signal and stores it in the FIFO through parallel data, the MCU reads the data stored in the FIFO in real time, and then transmits it to the PC through the network or serial port for analysis to obtain an accurate nuclear magnetic resonance frequency.
[0063] It should also be noted that in the present application, the MCU controls the DDS chip 1 through parallel data, the nuclear magnetic resonance signal and the transmission signal are input into the passive mixer for mixing, and then input into the AD chip. The AD chip stores the parallel data and control signal in real time and dynamically into the FIFO chip. The MCU reads the nuclear magnetic resonance signal in the FIFO through parallel data, and transmits it to the PC through the network or serial communication. The PC obtains the resonance frequency through Fourier calculation. The present application adopts a DDS chip 1 with high resolution, high bandwidth and high speed for output. Through MCU parallel data control, the speed and accuracy of nuclear magnetic resonance measurement are improved. The reception adopts high-bandwidth passive mixing and is stored in the FIFO through AD data processing. The nuclear magnetic resonance data is transmitted to the PC through the MCU for analysis and calculation, which improves the scalability of the system and simplifies data analysis. The structure of the entire nuclear magnetic resonance detection device is as follows: Figure 2 shown.
[0064] The utility model also provides an embodiment corresponding to a nuclear magnetic resonance measurement system, comprising an MCU and the nuclear magnetic resonance measurement device as described above, wherein the MCU is connected to the nuclear magnetic resonance measurement device.
[0065] The nuclear magnetic resonance measurement system provided in this embodiment corresponds to the above-mentioned device, and thus has the same beneficial effects as the above-mentioned device. Therefore, for the embodiments of the nuclear magnetic resonance measurement system part, please refer to the description of the embodiments of the device part, which will not be repeated here.
[0066] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0067] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A nuclear magnetic resonance measuring device, It is characterized in that include: DDS chip, a first low-pass filter, a first amplifier device, a mixer, and a second low-pass filter; The DDS chip, the input end of the DDS chip is connected to the MCU, and the output end is connected to the input end of the first low-pass filter, and is used to output a corresponding radio frequency signal based on the control of the MCU; The first low-pass filter, the output end of which is connected to the first amplifier device, is used to filter out high-frequency components in the radio frequency signal; The first amplifier device, the output end of which is respectively connected to the input end of the probe and the input end of the mixer, is used to amplify the received filtered radio frequency signal and transmit the amplified radio frequency signal to the probe and the mixer respectively; The mixer, the input end of which is connected to the output end of the probe, is used to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe; The second low-pass filter, the input end of the second low-pass filter is connected to the output end of the mixer, and the output end is connected to the MCU, and is used to filter out the amplified RF signal in the mixed signal transmitted by the mixer, and transmit the nuclear magnetic resonance signal in the mixed signal to the MCU.
2. The nuclear magnetic resonance measuring device according to claim 1, It is characterized in that Also includes: A second amplifier device, wherein the input end of the second amplifier device is connected to the output end of the probe, and the output end of the second amplifier device is connected to the input end of the mixer, and is used for amplifying the nuclear magnetic resonance signal emitted by the probe and transmitting the amplified nuclear magnetic resonance signal to the mixer.
3. The nuclear magnetic resonance measuring device according to claim 1, It is characterized in that Also includes: A radio frequency switch, wherein the input end of the radio frequency switch is connected to the output end of the first amplifier device, the first output end is connected to the input end of the probe, the second output end is connected to the input end of the mixer, and the control end is connected to the MCU, and is used to transmit the amplified radio frequency signal to the probe or the mixer based on the control of the MCU.
4. The nuclear magnetic resonance measuring device according to claim 1, It is characterized in that The mixer is a passive mixer, the input end of which is respectively connected to the output end of the probe and the output end of the first amplifier device, and is used to mix the amplified radio frequency signal and the nuclear magnetic resonance signal emitted by the probe.
5. The nuclear magnetic resonance measuring device according to claim 1, It is characterized in that Also includes: A third amplifier device, wherein the input end of the third amplifier device is connected to the output end of the second low-pass filter, and the output end of the third amplifier device is connected to the MCU, and is used for amplifying the nuclear magnetic resonance signal in the mixed signal, and transmitting the amplified nuclear magnetic resonance signal in the mixed signal to the MCU.
6. The nuclear magnetic resonance measuring device according to any one of claims 1 to 5, It is characterized in that Also includes: A data processing module, wherein the input end of the data processing module is connected to the output end of the second low-pass filter, and the output end is connected to the MCU, and is used to perform analog-to-digital conversion processing on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion processing to the MCU.
7. The nuclear magnetic resonance measuring device according to claim 6, It is characterized in that The data processing module is an ADC, the input end of the ADC is connected to the output end of the second low-pass filter, and the output end is connected to the MCU, and is used to perform analog-to-digital conversion on the nuclear magnetic resonance signal in the mixed signal, and transmit the digital signal generated after the analog-to-digital conversion to the MCU.
8. The nuclear magnetic resonance measuring device according to claim 6, It is characterized in that Also includes: A data storage module, wherein the input end of the data storage module is connected to the output end of the data processing module, and the output end is connected to the MCU, and is used to store the digital signal and enable the MCU to read the digital signal in the storage in real time.
9. The nuclear magnetic resonance measuring device according to claim 8, It is characterized in that The data storage module is a FIFO, the input end of the FIFO is connected to the output end of the data processing module, and the output end is connected to the MCU, and is used to store the digital signal and enable the MCU to read the digital signal in the storage in real time.
10. A nuclear magnetic resonance measurement system, It is characterized in that It comprises an MCU and a nuclear magnetic resonance measuring device as claimed in any one of claims 1 to 9, wherein the MCU is connected to the nuclear magnetic resonance measuring device.