CN211182155U - Sine wave frequency sweeping high-voltage radio frequency device for driving mass analyzer of mass spectrometer - Google Patents
Sine wave frequency sweeping high-voltage radio frequency device for driving mass analyzer of mass spectrometer Download PDFInfo
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- CN211182155U CN211182155U CN202020065214.8U CN202020065214U CN211182155U CN 211182155 U CN211182155 U CN 211182155U CN 202020065214 U CN202020065214 U CN 202020065214U CN 211182155 U CN211182155 U CN 211182155U
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Abstract
The utility model discloses a drive mass spectrograph mass analyzer's sine wave frequency sweep high pressure radio frequency device, it includes: the device comprises a field programmable gate array, a mass analyzer, a boost control module, a frequency modulation amplification module, a load capacitance adjusting module and a resonance boost module; the capacitance value of the variable load capacitor is controlled in real time, and the resonant frequency of the radio frequency device is continuously adjusted, so that the low power consumption of the radio frequency device can be kept in the frequency-selecting and boosting processes, the interval range of the mass number of the mass spectrometer is widened, the power consumption in the operation process is reduced, the waveform distortion of the mass spectrometer is small, the defect of poor linearity is overcome, the technical effect is achieved through the technical scheme, the performance of the mass spectrometer is enhanced, and the analysis efficiency of the mass spectrometer is remarkably improved.
Description
Technical Field
The utility model relates to a mass spectrometry technical field especially relates to a drive mass spectrograph mass analyzer's sine wave frequency sweep high pressure radio frequency device.
Background
Mass spectrometry is an analytical method for mass analysis and structural identification of a sample using a charge-to-mass ratio. At present, the mass spectrometry has high analysis speed, high sensitivity and strong specificity, and is widely applied to the fields of environmental detection, clinical analysis, organic synthesis, drug research and development and the like. Generally, mass spectrometers are composed primarily of an ion source, an ion transport system, a mass analyzer, a detector, a vacuum system, and a data acquisition system. There are various types of mass analyzers, such as quadrupole rods, ion traps, time-of-flight, fourier transform ion cyclotron resonance traps, and the like. Ion trap mass analyzers can operate at higher gas pressures than other mass analyzers, making them one of the ideal choices for miniaturized mass spectrometers.
The utility model application No. 201710282429.8 discloses a sine wave frequency scanning device for driving a mass spectrometer, as shown in fig. 1, the device includes: the system comprises a micro control unit 201, a signal output module 202 and a broadband high-voltage amplifier 203, wherein the micro control unit 201 is electrically connected with the signal output module 202, and the signal output module 202 is electrically connected with the broadband high-voltage amplifier 203; the micro control unit 201 is configured to obtain preset sine wave data from a terminal, and transmit the preset sine wave data to the signal output module 202; the signal output module 202 is configured to receive the sine wave data, convert the sine wave data into a sine wave voltage signal after receiving a conversion signal sent by the micro control unit 201, and transmit the sine wave voltage signal to the broadband high-voltage amplifier 203; the broadband high-voltage amplifier 203 is electrically connected with the ion trap mass analyzer, and is configured to amplify the sine wave voltage signal into a high-voltage sine wave signal, and transmit the high-voltage sine wave signal to two plates of the ion trap mass analyzer, so as to provide a radio-frequency voltage scanned by sine wave frequency to the two plates. The technical problem that when the mass analysis is carried out by using the ion trap mass analyzer, the discharge between electrodes is easily caused by an amplitude scanning mode and the power consumption generated by a frequency scanning mode is larger is mainly solved.
However, the utility model with patent application No. 201710282429.8 mainly uses a high frequency transformer to increase the output voltage to directly control the ion trap mass analyzer, so the disadvantage is also obvious to those skilled in the art, that is, the output voltage amplitude is not high, which results in the technical problems of narrow mass range, large power consumption, large waveform distortion and poor linearity, and therefore the analysis efficiency of the mass spectrometer related to the above patent is still to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a drive mass spectrograph mass analyzer's sine wave frequency sweep high pressure radio frequency device, it is not high to aim at solving the sine wave frequency scanning device voltage amplitude who is used for driving the mass spectrograph among the prior art to leaded to the quality interval narrower, and the consumption is great, and the wave form distortion is big, linear poor technical problem.
In order to achieve the above object, the utility model provides a drive mass spectrometer mass analyzer's sine wave frequency sweep high pressure radio frequency device, include: the device comprises a field programmable gate array, a mass analyzer, a boost control module, a frequency modulation amplification module, a load capacitance adjusting module and a resonance boost module; the micro control unit is electrically connected with the field programmable gate array; the boost control module is respectively electrically connected with the field programmable gate array, the frequency modulation amplification module and the resonance boost module; the frequency modulation amplification module is respectively and electrically connected with the boost control module, the field editable gate array and the resonance boost module; the load capacitance adjusting module is electrically connected with the field programmable gate array and the resonance boosting module respectively; the resonance boosting module is electrically connected with the mass analyzer; the boost control module is used for converting a first electric signal output by the field programmable gate array into a standard analog signal and acquiring a real-time signal of the voltage of the resonance boost module, generating an integral control signal after comparing the standard analog signal with the real-time signal and outputting the integral control signal to the frequency modulation module; the frequency modulation amplification module is used for synthesizing a resonance frequency signal output by the field gate array and the received integral control signal into a frequency modulation signal, and amplifying the frequency modulation signal into a frequency modulation amplification signal for driving the resonance boosting module; the load capacitance adjusting module adjusts the variable load capacitance in real time through the step control of the driving motor to generate a current load capacitance value required by the resonance boosting module for boosting; and the resonance boosting module is used for receiving the frequency modulation amplification signal and generating radio frequency high-voltage output through the resonance of the variable load capacitor and the mass analyzer.
The utility model provides a pair of drive mass spectrograph mass analyzer's sine wave frequency sweep high pressure radio frequency device, beneficial effect lies in: through the capacitance value of real-time control variable load capacitance, the resonant frequency of radio frequency device can be constantly adjusted, make it keep low-power consumption in the frequency selection and pressure boost process, thereby widen the interval scope of the mass number of mass spectrometer, and reduced the consumption in the operation process, make the waveform distortion of mass spectrometer less, remedy the shortcoming of linearity difference, the technological effect that reaches through above-mentioned technical scheme and technical scheme, strengthened the performance of mass spectrometer promptly, make the analysis efficiency of mass spectrometer show and promote.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a background art drawing;
fig. 2 is a block diagram schematically illustrating the structure of a sine wave frequency sweeping high-voltage rf device for driving a mass spectrometer;
fig. 3 is a detailed structure schematic block diagram of a sine wave frequency sweeping high-voltage radio frequency device for driving a mass analyzer of a mass spectrometer according to an embodiment of the present invention;
fig. 4 is a simplified circuit diagram of a specific application of a variable load capacitance module of a sine wave frequency sweep high voltage rf apparatus for driving a mass analyzer of a mass spectrometer of the present invention;
fig. 5 is a simplified circuit diagram of a specific application of a sine wave swept high voltage radio frequency apparatus of another embodiment of the present invention for driving a mass analyzer of a mass spectrometer.
Detailed Description
To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2 and 3, a sine wave swept high voltage rf apparatus for driving a mass analyzer of a mass spectrometer includes: a micro control unit 101, a field programmable gate array 102, a mass analyzer 103, a direct current voltage output module 104, a second digital-to-analog converter 105, a high voltage module 106, a detector 109, a signal amplifier 107 and an analog-to-digital converter 108; the sine wave frequency sweeping high-voltage radio frequency device for driving the mass analyzer of the mass spectrometer further comprises: the device comprises a boost control module 201, a frequency modulation amplification module 202, a load capacitance adjusting module 203 and a resonance boost module 204.
The micro control unit 101 is electrically connected to the field programmable gate array 102.
The boost control module 201 is electrically connected with the field programmable gate array 102, the frequency modulation amplification module 202 and the resonance boost module 204 respectively; the boost control module 201 is configured to convert the first electrical signal output by the fpga 102 into a standard analog signal and a real-time signal of the voltage of the resonant boost module 204, and output an integral control signal to the fm amplification module 202 after generating the integral control signal after comparing the standard analog signal and the real-time signal.
The frequency modulation amplification module 202 is respectively electrically connected with the field programmable gate array 102, the boost control module 201 and the resonance boost module 204; the fm amplifier module 202 is configured to convert a control signal of the fpga 102 into a resonant frequency signal; meanwhile, the resonance frequency signal and the received integral control signal output by the boost control module 201 are synthesized and synthesized into a frequency modulation signal; and generates a fm amplified signal through power amplification to drive the resonant boost module 204.
The load capacitance adjusting module 203 is electrically connected with the field programmable gate array 102 and the resonance boosting module 204 respectively; the load capacitance adjusting module 203 is configured to receive a control signal of the field programmable gate array 102, where the control signal controls the motor to adjust the variable load capacitor step by step, and generates a current load capacitance value required for boosting by the resonant boosting module 204.
The resonant booster module 204 is electrically connected with the mass analyzer 103; the resonance boosting module 204 is configured to receive the frequency modulation amplification signal, and generate a radio frequency high voltage output through the load capacitance adjusting module 203 and the mass analyzer 103 by resonance.
One end of the dc voltage output module 104 is electrically connected to the micro control unit 101, and the other end of the dc voltage output module 104 is electrically connected to the lens in the mass analyzer 103, and is configured to output a dc voltage to the lens after receiving an output signal sent by the micro control unit 101.
One end of the second digital-to-analog conversion module 105 is electrically connected with the micro control unit 101, the other end of the second digital-to-analog conversion module 105 is electrically connected with one end of the high voltage module 106, and the other end of the high voltage module 106 is electrically connected with the detector 109; the detector 109 is used to detect ions analyzed by the mass analyzer 103; the second digital-to-analog conversion module 105 is configured to receive the control voltage signal output by the micro control unit 101, and convert the control voltage signal into an analog voltage to control the voltage value of the high voltage module 106; the high voltage module 106 is used to provide an operating voltage to the detector 109.
One end of the signal amplifier 107 is electrically connected with the detector 109, the other end of the signal amplifier 107 is electrically connected with one end of the analog-to-digital conversion module 108, and the other end of the analog-to-digital conversion module 108 is electrically connected with the micro control unit 101; a signal amplifier 107 for receiving the current signal transmitted by the detector 109, amplifying the current signal and converting the current signal into a voltage signal; the analog-to-digital conversion module 108 is configured to receive the voltage signal transmitted by the signal amplifier 107, convert the voltage signal into a digital signal, and transmit the digital signal to the micro control unit 101, so that the micro control unit 101 transmits the digital signal to a terminal and then processes the digital signal into a mass spectrogram.
In the present embodiment, the mass analyser 103 is an ion trap mass analyser; in other embodiments, the mass analyzer 103 may also be a quadrupole mass analyzer.
The boost control module 201 includes: a first dac 211, an integrator 221, and a sampling module 231;
the first digital-to-analog converter 211 is electrically connected to the field programmable gate array 102 and the integrator 221, respectively; the first digital-to-analog converter 211 is used for converting the first electric signal output by the field programmable gate array 102 into a standard analog signal; in the operation process of the device, the field programmable gate array 102 controls the amplitude of the output radio frequency high voltage by controlling the size of the digital-to-analog conversion value output by the first digital-to-analog converter 211 in real time;
the sampling module 231 is electrically connected with the integrator 221 and the resonance boosting module 204; the sampling module 231 is used for acquiring a real-time signal output by the resonance boosting module 204 at a high radio frequency and a high voltage; in the operation process of the device, the sampling module 231 collects the high voltage output by the resonance boosting module 204 in real time and outputs a group of analog signals in real time according to a certain proportion, wherein the analog signals are the real-time signals;
the integrator 221 is electrically connected to the first dac 211 and the sampling module 231, respectively; the integrator 221 is configured to compare the standard analog signal with the real-time signal to generate an integral control signal, and the fm amplification module 202 outputs the integral control signal; during the operation of the apparatus, the integrator 221 mainly functions to generate a set of adjusted integration control signals to be transmitted to the fm amplifier module 202 by comparing the analog-to-digital conversion value signal output by the first dac 211 with the analog signal collected by the sampling module 231.
The fm amplification module 202 includes: frequency generator 212, frequency modulation circuit 222, and rf power amplifier 232; in this embodiment, the frequency generator 212 is a Direct Digital frequency generator 212, english of the Direct Digital frequency generator 212 is called Direct Digital Synthesizer, and english is called DDS for short, and the fpga 102 controls the Direct Digital frequency generator 212 to generate a DDS frequency signal, which is a resonant frequency signal;
wherein, the frequency generator 212 is electrically connected to the fpga 102 and the fm circuit 222; the frequency generator 212 is used for generating a resonance frequency signal under the control of the field programmable gate array 102 and outputting the resonance frequency signal to the frequency modulation circuit 222;
the frequency modulation circuit 222 is electrically connected to the frequency generator 212, the integrator 221 and the rf power amplifier 232; the frequency modulation circuit 222 is configured to receive the resonant frequency signal generated by the frequency generator 212 and the integration control signal generated by the integrator 221, and perform an operation on the two signals to generate a frequency modulation signal.
The radio frequency power amplifier 232 is electrically connected with the frequency modulation circuit 222 and the resonance boosting module 204 respectively; the rf power amplifier 232 is configured to receive the frequency modulated signal generated by the frequency modulation circuit 222 and amplify the frequency modulated signal to generate a frequency modulated amplified signal, which is used to drive the resonant boosting module 204 to boost.
The resonance boosting module 204 is a resonance boosting hollow coil, a primary coil of the resonance boosting hollow coil is connected with the radio frequency power amplifier 232, and a secondary coil is electrically connected with the mass analyzer 103; after receiving the frequency modulation amplification signal, the resonance booster coil resonates through the variable load capacitor 223 and the mass analyzer 103 to generate radio frequency high voltage output.
In this embodiment, the load capacitance adjusting module 203 includes: a motor driving module 213 and a variable load capacitor 223; wherein the variable load capacitor 223 is electrically connected to the secondary winding of the resonant booster air core winding and is connected in parallel with the mass analyser 103; the variable load capacitor 223 is used to change the capacitance value under the driving of the motor driving module 213, and in addition, in the embodiment, the motor driving module 213 is a stepping motor, and the field programmable gate array 102 controls the stepping motor, so as to control the variable load capacitor 223 to output different capacitance values.
As shown in fig. 4, a simplified circuit diagram of a specific application of a load capacitor module of a sine wave frequency sweep high voltage rf device for driving a mass analyzer of a mass spectrometer is provided, where AC is a frequency modulation amplified signal, L is a primary coil of a resonant boost air coil, L is a secondary coil of the resonant boost air coil, L and L are both wound on a hollow frame, C1 is a variable load capacitor 223, which is a variable capacitor driven by a stepping motor, C2 is a variable capacitor C after the mass analyzer 103, L, C1 and C2 are connected in parallel, and generates resonant boost at a resonant frequency f, and f and C1 are changed by synchronous control, so that a frequency variable in a certain range and a resonant output rf high voltage can be obtained on C2.
In another embodiment, variable load capacitor 223 is an electrically controlled magnetic rod; the electric control magnetic bar is arranged between the primary coil and the secondary coil of the resonance boosting hollow coil, and moves along the axial direction of the primary coil of the resonance boosting hollow coil to be far away from or close to the resonance boosting hollow coil under the driving of the motor;
as shown in fig. 5, fig. 5 is a simplified circuit diagram of a specific application of a sine-wave frequency-sweeping high-voltage rf apparatus for driving a mass analyzer of a mass spectrometer in another embodiment, a variable load capacitor 223 is an electrically controlled magnetic rod, AC is a frequency-modulated amplified signal, L is a primary driving coil, L is a secondary resonant coil, C is the mass analyzer 103, and a variable-frequency and resonantly-output rf high voltage can be obtained by synchronously changing a resonant inductance L and a resonant frequency f according to a L C series resonance formula 2 pi fc ═ 1/(2 pi f L).
The utility model provides a pair of drive mass spectrometer mass analyzer's sine wave frequency sweep high pressure radio frequency device, its theory of operation as follows: through the capacitance value of real-time control variable load capacitance, the resonant frequency of radio frequency device can be constantly adjusted, make it keep low-power consumption in the frequency selection and pressure boost process, thereby widen the interval scope of the mass number of mass spectrometer, and reduced the consumption in the operation process, make the waveform distortion of mass spectrometer less, remedy the shortcoming of linearity difference, the technological effect that reaches through above-mentioned technical scheme and technical scheme, strengthened the performance of mass spectrometer promptly, make the analysis efficiency of mass spectrometer show and promote. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above is right the utility model provides a drive sinusoidal wave frequency sweep high pressure radio frequency device of mass spectrometer mass analyzer's description, to technical personnel in the field, according to the utility model discloses the thought, all has the change part on concrete implementation and range of application, to sum up, this description content should not be understood as the restriction of the utility model discloses.
Claims (6)
1. A sine wave swept high voltage radio frequency apparatus for driving a mass spectrometer mass analyzer, comprising:
the device comprises a field programmable gate array, a boost control module, a frequency modulation amplification module, a load capacitance adjusting module, a resonance boost module and a mass analyzer;
the boost control module is respectively and electrically connected with the field programmable gate array, the resonance boost module and the frequency modulation amplification module; the frequency modulation amplification module is respectively and electrically connected with the boost control module, the field editable gate array and the resonance boost module; the load capacitance adjusting module is electrically connected with the field programmable gate array and the resonance boosting module respectively; the mass analyzer is electrically connected with the resonance boosting module;
the boost control module is used for converting a first electric signal output by the field programmable gate array into an analog signal, acquiring a real-time signal of the output voltage of the resonance boost module, generating an integral control signal after comparing the analog signal with the real-time signal, and outputting the integral control signal to the frequency modulation amplification module;
the frequency modulation amplification module is used for generating a resonance frequency signal, receiving the integral control signal and generating a frequency modulation amplification signal so as to drive the output voltage of the resonance boosting module;
the load capacitance adjusting module is used for receiving a motor control signal of the field editable gate array to adjust the variable load capacitor and generating a current load capacitance value required by the resonance boosting module for boosting;
and the resonance boosting module is used for receiving the frequency modulation amplification signal and generating radio frequency high-voltage output through resonance of the variable load capacitor and the mass analyzer.
2. A sine wave swept high pressure radio frequency device driving a mass spectrometer mass analyzer according to claim 1,
the boost control module includes:
the device comprises a first digital-to-analog converter, an integrator and a sampling module;
the first digital-to-analog converter is respectively and electrically connected with the field programmable gate array and the integrator; the integrator is respectively and electrically connected with the first digital-to-analog converter, the sampling module and the frequency modulation circuit; the sampling module is electrically connected with the integrator and the resonance boosting module;
the first digital-to-analog converter is used for converting a first electric signal output by the field programmable gate array into an analog signal;
the sampling module is used for acquiring a real-time signal of the output voltage of the resonance boosting module;
the integrator is used for comparing the analog signal and the real-time signal to generate an integral control signal and then outputting the integral control signal to the frequency modulation circuit.
3. A sine wave swept high pressure radio frequency device driving a mass spectrometer mass analyzer according to claim 1,
the frequency modulation amplifying module comprises:
the frequency modulation circuit comprises a frequency generator, a frequency modulation circuit and a radio frequency power amplifier;
the frequency generator is respectively electrically connected with the field programmable gate array and the frequency modulation circuit; the frequency modulation circuit is respectively and electrically connected with the frequency generator, the integrator and the radio frequency power amplifier; the radio frequency power amplifier is respectively and electrically connected with the frequency modulation circuit and the resonance boosting module;
the frequency generator is used for generating a resonance frequency signal under the control of the field programmable gate array and outputting the resonance frequency signal to the frequency modulation circuit;
the frequency modulation circuit is used for receiving the resonance frequency signal and the integral control signal and then synthesizing to generate a frequency modulation signal;
the radio frequency power amplifier is used for amplifying the received frequency modulation signal to generate a frequency modulation amplification signal and outputting the frequency modulation amplification signal to the resonance boosting module.
4. A sine wave swept high pressure radio frequency device driving a mass spectrometer mass analyzer according to claim 1,
the load capacitance adjustment module includes: the motor driving module and the variable load capacitor;
the motor driving module is electrically connected with the field editable gate array and the variable load capacitor; the variable load capacitor is electrically connected with the motor driving module and the resonance boosting module;
the motor driving module is used for receiving a control signal of the field editable gate array and generating a group of stepping control signals in real time to control the variable load capacitor;
the variable load capacitor is used for changing a capacitance value in real time under the control of the motor driving module, the capacitance value changed in real time and the secondary inductance of the resonance boosting module resonate to generate high-voltage output, and the variable load capacitor is connected with the mass analyzer in parallel.
5. A sine wave swept high pressure radio frequency device driving a mass spectrometer mass analyzer according to claim 3,
the resonance boosting module is a resonance boosting hollow coil, a primary coil of the resonance boosting hollow coil is connected with the radio frequency power amplifier, and a secondary coil of the resonance boosting hollow coil is electrically connected with the mass analyzer and the variable load capacitor;
and after receiving the frequency modulation amplification signal, the resonance boosting hollow coil generates radio frequency high-voltage output through resonance of the variable load capacitor and the mass analyzer.
6. A sine wave swept high pressure radio frequency device driving a mass spectrometer mass analyzer according to claim 1,
the mass analyser is an ion trap mass analyser or a quadrupole mass analyser.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141602A (en) * | 2021-10-20 | 2022-03-04 | 广州禾信仪器股份有限公司 | Quadrupole rod control scanning mass spectrum system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141602A (en) * | 2021-10-20 | 2022-03-04 | 广州禾信仪器股份有限公司 | Quadrupole rod control scanning mass spectrum system and control method thereof |
| CN114141602B (en) * | 2021-10-20 | 2024-02-13 | 广州禾信仪器股份有限公司 | Quadrupole rod control scanning mass spectrum system and control method thereof |
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Addressee: Patent of Suzhou anyipu Precision Instrument Co.,Ltd. The person in charge Document name: Approval notice of fee reduction |