An isolated gate voltage stabilizing circuit, control method, device and storage medium

Abstract

The application provides an isolated grid voltage stabilizing circuit, a control method, a device and a storage medium, which are characterized in that the application is applied to a polarity switching ion mobility spectrometer, and the circuit comprises: a first diode, a first resistor and a third diode connected in series; a second diode and a fourth diode connected through the first resistor; a capacitor connected in parallel at both ends of the first resistor; a migration tube voltage input end for inputting negative high voltage or positive high voltage; and a plurality of second resistors connected in series between the migration tube voltage input end and an isolated grid voltage input end. The technical scheme provided by the application can effectively shorten the voltage stabilizing time of the isolated grid, improve the polarity mode switching speed of the ion mobility spectrometer, and improve the detection efficiency of the ion mobility spectrometer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ion mobility spectrometry, and in particular to an isolation grid voltage stabilizing circuit, a control method and device, and a storage medium. BACKGROUND

[0002] Ion mobility spectrometry (IMS) is an atmospheric pressure analysis method based on the mobility of gas-phase ions in a weak electric field to detect and identify different kinds of substances. IMS is widely used in public safety detection, such as component detection and analysis of some dangerous substances, including toxic industrial chemicals (TIC), chemical warfare agents (CWA), drugs, explosives, etc.

[0003] For different target substances to be detected and analyzed, the properties of their corresponding molecules are not the same, and positive or negative ions can be formed during ionization. For example, explosive molecules mostly have high electron affinity, and explosives produce negative ions after ionization; drug molecules mostly have high proton affinity, and drugs produce positive ions after ionization; it should be noted that different chemical warfare agents and toxic industrial chemicals also produce ions of different polarities according to the properties of their corresponding molecules.

[0004] Traditional ion mobility spectrometry instruments can only work in a single mode of positive or negative polarity, and can only obtain corresponding detection and analysis results according to the ions of one polarity produced by the sample to be detected and analyzed during single detection and analysis, but cannot produce ions of both positive and negative polarities and perform corresponding detection and analysis.

[0005] To meet the demand of using a single ion mobility spectrometry instrument to produce ions of both polarities and perform corresponding detection and analysis, a double ion mobility tube method can be used to control the migration of positive ions and positive and negative ions using two ion mobility tubes to achieve the effect of simultaneously detecting and analyzing positive and negative ions of both polarities; a method of switching the polarity on a single mobility tube can also be used to produce positive and negative ions alternately to achieve the effect of simultaneously detecting and analyzing positive and negative ions of both polarities.

[0006] For the double ion mobility tube method, using two ion mobility tubes increases the overall volume of the instrument. Corresponding to the two ion mobility tubes, two sets of corresponding electronic control hardware need to be set up, which is complex to design, has high manufacturing cost, and consumes a lot of power. Compared with the double ion mobility tube method, the method of switching the polarity on a single mobility tube is widely used due to its relatively simple design, low manufacturing cost, low power consumption, and relatively small overall volume of the instrument.

[0007] The inventors find that, in the method of polarity switching on a single migration tube, the switching efficiency of the corresponding polarity detection mode is a key element affecting the detection result. Specifically, when the concentration of the sample changes over time, if the switching efficiency of the polarity detection mode is low, the detection mode cannot be switched in time, and due to the too fast volatilization of the sample, the sample cannot be detected in the corresponding polarity detection mode. For example, when detecting trace amounts of explosive triacetone triperoxide (TATP) in a single injection, TATP itself peaks in the positive polarity detection mode of the ion mobility spectrometer. Due to the volatile nature of TATP, if the ion mobility spectrometer is currently in a negative polarity detection mode, if the negative polarity detection mode cannot be switched to the positive polarity detection mode in time, then during the switching process of the detection mode, trace amounts of TATP in the sample will have completely volatilized, and the detection result obtained by switching to the positive polarity detection mode will miss the detection of TATP. Therefore, it is urgent to improve the switching speed of the polarity detection mode of the ion mobility spectrometer.

[0008] In the ion mobility spectrometer, the isolation grid is used to control the ion group of the corresponding polarity to pass through the migration zone and reach the detector. The capacitor connected to the isolation grid is mainly used to filter and stabilize the voltage between the isolation grid and the detector, so as to reduce the noise of the ion current measurement signal. Due to the polarity detection mode switching, the capacitor will be frequently charged and discharged during the switching, and the charging and discharging of the capacitor will slow down the voltage stabilization time on the isolation grid, resulting in signal clutter and affecting the overall polarity detection mode switching time of the ion mobility spectrometer. Therefore, during the polarity detection mode switching of the ion mobility spectrometer, the stability of the voltage on the isolation grid is related to the switching speed of the polarity detection mode.

[0009] Therefore, there is an urgent need for an isolation grid voltage stabilizing circuit that can improve the switching speed. SUMMARY

[0010] Therefore, the present application provides an isolation grid voltage stabilizing circuit, a control method, an apparatus and a storage medium, to solve the technical problem that the polarity switching ion mobility spectrometer in the prior art has a relatively low detection mode switching speed due to the relatively low isolation grid voltage stabilization speed during the detection mode switching.

[0011] In a first aspect, the present application provides an isolation grid voltage stabilizing circuit applied to a polarity switching ion mobility spectrometer, the circuit comprising:

[0012] a first diode, a first resistor and a third diode connected in series; the anode of the first diode is connected to the cathode of the third diode through the first resistor, the cathode of the first diode is connected to the isolation grid voltage input end, and the anode of the third diode is grounded;

[0013] The cathode of the second diode is connected with the anode of the fourth diode through the first resistor, the anode of the second diode is connected with the isolated gate voltage input end, and the cathode of the fourth diode is grounded.

[0014] A capacitor is connected in parallel across the first resistor.

[0015] A migration tube voltage input end is configured to input a negative high voltage or a positive high voltage.

[0016] A plurality of second resistors are connected in series between the migration tube voltage input end and the isolated gate voltage input end.

[0017] In a second aspect, the application provides an isolated gate voltage stabilization control method for providing stable voltage when the polarity of the isolated gate voltage is switched, based on the isolated gate voltage stabilization control circuit of the first aspect, and the method comprises the following steps of:

[0018] Determining the voltage type input by the migration tube voltage input end; the voltage type is a positive high voltage or a negative high voltage.

[0019] When the voltage type is a positive high voltage, a circuit composed of a second diode, a first resistor and a fourth diode is turned on, and a capacitor provides a filtering and voltage stabilization function to reduce the voltage ripple of the isolated gate voltage.

[0020] When the voltage type is a negative high voltage, a circuit composed of a third diode, the first resistor and a first diode is turned on, and the capacitor still provides a filtering and voltage stabilization function to reduce the voltage ripple of the isolated gate voltage.

[0021] In a third aspect, the application provides an isolated gate voltage stabilization control device for providing stable voltage when the polarity of the isolated gate voltage is switched, based on the isolated gate voltage stabilization control circuit of the first aspect, and the device comprises the following steps of:

[0022] A voltage type determination module is configured to determine the voltage type input by the migration tube voltage input end; the voltage type is a positive high voltage or a negative high voltage.

[0023] A first conduction module is configured to, when the voltage type is a positive high voltage, turn on a circuit composed of a second diode, a first resistor and a fourth diode, and a capacitor provides a filtering and voltage stabilization function to reduce the voltage ripple of the isolated gate voltage.

[0024] A second conduction module is configured to, when the voltage type is a negative high voltage, turn on a circuit composed of a third diode, the first resistor and a first diode, and the capacitor provides a filtering and voltage stabilization function to reduce the voltage ripple of the isolated gate voltage.

[0025] In a fourth aspect, the present application provides a computer device, comprising a memory and a processor, which are in communication connection with each other, and the memory stores computer instructions, and the processor, by executing the computer instructions, implements the isolation grid voltage stabilizing control method in the second aspect.

[0026] In a fifth aspect, the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions, when executed by a processor, implement the isolation grid voltage stabilizing control method in the second aspect.

[0027] The isolation grid voltage stabilizing circuit, the control method, the device and the storage medium provided by the present application have at least the following beneficial effects:

[0028] The technical solution provided by the present application can set four diodes in the voltage stabilizing circuit, so that the electric field of the capacitor two polar plates will not change with the type switching, no matter the type of high voltage at the voltage input end of the migration tube is positive high voltage or negative high voltage. When the type of high voltage at the voltage input end of the migration tube changes, the capacitor does not have to be frequently charged and discharged, that is, the stability of the voltage on the isolation grid is maintained when the voltage polarity is switched. That is, when the ion mobility spectrometer switches the detection mode, the voltage of the capacitor always remains the same and will not change with the switching of the detection mode, effectively maintaining the stability of the voltage between the isolation grid and the detector, effectively reducing the noise of the detector measurement signal. The capacitor does not have to be frequently charged and discharged, which accelerates the stabilization time of the voltage on the isolation grid, improves the switching speed of the detection mode of the ion mobility spectrometer, and further improves the accuracy of the detection result of the ion mobility spectrum and improves the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative labor. It should be noted that the drawings in the following description are schematic and should not be understood as any limitation on the present application. In the drawings:

[0030] Figure 1 A partial structure schematic diagram of an ion mobility spectrometer in the prior art of the present application is shown;

[0031] Figure 2 A structure schematic diagram of an isolation grid voltage stabilizing circuit in the prior art of the present application is shown;

[0032] Figure 3Part of the structure of ion mobility spectrometry in one embodiment of the application is shown in the schematic diagram;

[0033] Figure 4 The structure of the isolated grid voltage regulator in one embodiment of the application is shown in the schematic diagram;

[0034] Figure 5 The polarity switching time based on prior art in one embodiment of the application is shown in the schematic diagram;

[0035] Figure 6 The polarity switching time based on the technical solution of the application in one embodiment of the application is shown in the schematic diagram;

[0036] Figure 7 The schematic diagram of the isolated grid voltage regulator control method in one embodiment of the application is shown;

[0037] Figure 8 The schematic diagram of the isolated grid voltage regulator control device in one embodiment of the application is shown;

[0038] Figure 9 The schematic diagram of the computer device in one embodiment of the application is shown. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the application.

[0040] In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0043] The isolation grid voltage stabilizing circuit provided by the present application can be applied to a polarity-switching ion mobility spectrometer, and is used to provide a stable voltage for the isolation grid when the ion mobility spectrometer detection mode is switched. In the polarity-switching ion mobility spectrometer, the type of the input voltage of the voltage input end of the ion mobility tube is positive high voltage or negative high voltage. When the ion mobility spectrometer detection mode is switched, the type of the input voltage of the voltage input end of the ion mobility tube is switched to the target type. That is, when the ion mobility spectrometer detection mode is switched to a positive polarity detection mode, the type of the input voltage of the voltage input end of the ion mobility tube is switched to positive high voltage; and when the ion mobility spectrometer detection mode is switched to a negative polarity detection mode, the type of the input voltage of the voltage input end of the ion mobility tube is switched to negative high voltage.

[0044] Referring to Figure 1 As shown in the figure, HV is a high-voltage source capable of switching polarity, which is connected with the voltage input end of the mobility tube. A plurality of resistors are connected in series between the voltage input end of the mobility tube and the voltage input end of the isolation grid. There are an ion gate and a plurality of electrode rings between the voltage input end of the mobility tube and the voltage input end of the isolation grid. A resistor is arranged between adjacent two electrode rings to form an electric field for the migration of ions to the detector end. The ion gate is used to control the injection of ions in the mobility tube. The capacitor connected to the isolation grid is mainly used to stabilize the voltage between the isolation grid and the detector, so as to reduce the noise of the ion current measurement signal. The type of the ion source can be any ion source capable of working in two polarity modes.

[0045] Referring to Figure 1 and Figure 2 As shown in the figure, in the polarity-switching ion mobility spectrometer shown in Figure 1 In the polarity-switching ion mobility spectrometer shown in the figure, the ion mobility spectrometer mainly passes through a grounded capacitor C, and a resistor R1 is connected in parallel across the capacitor. The capacitor C is mainly used to stabilize the voltage between the shield grid and the detector, so as to reduce the noise of the ion current measurement signal. Generally, the highest possible capacitor is selected for the capacitor. The type of the input voltage of the voltage input end U DriftWhen the high voltage of the migration tube voltage input end U Drift frequently charges and discharges, the charging and discharging of the capacitor C slows down the voltage stabilization time on the isolation grid, causes signal disorder, slows down the working mode switching time of the ion mobility spectrometer, and causes inaccurate detection results.

[0046] Referring to Figure 3 and Figure 4 , the present application provides an isolation grid voltage stabilizing circuit which can be applied to a polarity switching ion mobility spectrometer, the circuit comprising:

[0047] a first diode D1, a first resistor R1 and a third diode D3 connected in series; the anode of the first diode is connected to the cathode of the third diode through the first resistor, the cathode of the first diode is connected to the isolation grid voltage input end, and the anode of the third diode is grounded;

[0048] the cathode of the second diode is connected to the anode of the fourth diode through the first resistor, the anode of the second diode is connected to the isolation grid voltage input end, and the cathode of the fourth diode is grounded;

[0049] a capacitor C connected in parallel across the first resistor;

[0050] a migration tube voltage input end U Drift for inputting a negative high voltage or a positive high voltage;

[0051] a plurality of second resistors R2 connected in series between the migration tube voltage input end and the isolation grid voltage input end P.

[0052] In this embodiment, specifically, when the high voltage of the migration tube voltage input end U Drift is a positive high voltage, the second diode D2 and the fourth diode D4 are turned on, and the first diode D1 and the third diode D3 are turned off. The positive high voltage of the migration tube voltage input end U Drift is connected in series to the isolation grid voltage input end P through a plurality of second resistors R2, the second diode D2, the first resistor R1 and the fourth diode D4 connected in series are turned on, and the capacitor C is connected in parallel across the first resistor R1. Therefore, the capacitor C provides an electric field in the direction from the first electrode plate to the second electrode plate, wherein the first electrode plate is the electrode plate connected to the second end of the second diode, and the second electrode plate is the electrode plate connected to the first end of the fourth diode. When the high voltage of the migration tube voltage input end U DriftWhen the high voltage of the migration tube voltage input end is negative high voltage, the first diode D1 and the third diode D3 are turned on, and the second diode D2 and the fourth diode D4 are turned off. The voltage input end U Drift When the high voltage of the migration tube voltage input end is negative high voltage, the first diode D1 and the third diode D3 are turned on, and the second diode D2 and the fourth diode D4 are turned off. The voltage input end U

[0053] In the embodiment, specifically, by arranging four diodes in the voltage stabilizing circuit, the electric field of the two plates of the capacitor will not change when the type of the high voltage of the migration tube voltage input end is switched, no matter whether the type is positive high voltage or negative high voltage. When the type of the high voltage of the migration tube voltage input end is switched, the capacitor does not have to be frequently charged and discharged, and the stability of the voltage on the isolation grid when the voltage polarity is switched can be maintained. That is, when the ion mobility spectrometer switches the detection mode, the voltage across the two plates of the capacitor remains unchanged and does not change when the detection mode is switched, effectively maintaining the stability of the voltage between the isolation grid and the detector, effectively reducing the noise of the measurement signal of the detector. The capacitor does not have to be frequently charged and discharged, the voltage stabilizing time of the isolation grid is shortened, the switching speed of the detection mode of the ion mobility spectrometer is improved, the accuracy of the detection result of the ion mobility spectrometer is improved, and the detection efficiency is improved.

[0054] In one embodiment, the resistance value of the first resistor is 1KΩ-10MΩ.

[0055] The size of the capacitor is 10pF-10uF.

[0056] The resistance value of the second resistor is 10kΩ-10MΩ.

[0057] The number of the second resistors is adapted to the number of electrodes in the migration tube.

[0058] In one embodiment, the maximum rectification current of the first diode is the same as the maximum rectification current of the third diode, the maximum reverse working voltage of the first diode is the same as the maximum reverse working voltage of the third diode, and the reverse current of the first diode is the same as the reverse current of the third diode.

[0059] In one embodiment, the maximum rectified current of the second diode is the same as the maximum rectified current of the fourth diode, the maximum reverse working voltage of the second diode is the same as the maximum reverse working voltage of the fourth diode, and the reverse current of the second diode is the same as the reverse current of the fourth diode.

[0060] In the following, the present application provides a specific comparative experiment example in a practical application scenario, an operation platform for controlling ion mobility spectrometer polarity switching, for switching the working mode of the ion mobility spectrometer. The ion mobility spectrometer is controlled to work alternately in positive and negative polarity detection modes, and the experimental platform under polarity switching is continuously collected. The single spectrum collection time is 20 ms.

[0061] In the comparative experiment example passed by the present application, by setting different polarity switching periods, it is explored how long the system needs to obtain stable spectrum during the two polarity switching processes. In this process, the platform is not sampled. Referring to Figure 5 shown in Figure 5 , the background spectrum information obtained by continuously collecting under the conditions of a polarity switching period of 1600 ms and a conventional isolated grid voltage stabilization mode is shown. Referring to Figure 6 shown in Figure 6 , the background spectrum information obtained by continuously collecting under the conditions of a polarity switching period of 200 ms and the isolated grid voltage stabilization mode designed in the present application is shown. The capacitance size selected by the two processing modes is 220 nF. It can be seen that in the conventional resistance parallel capacitance mode, a long time is needed to stabilize the baseline after polarity switching to obtain a stable spectrum, about 600 ms. The technical solution provided by the present application utilizes four diodes to make the capacitance not have to be frequently charged and discharged when the type of high voltage at the input end of the drift tube voltage changes, that is, the stability of the voltage on the isolated grid is maintained when the voltage polarity is switched. The results show that a stable spectrum can be obtained after polarity switching for only about 20 ms. In the experiment, the technical solution of the present application shortens the time to obtain a stable spectrum after polarity switching to 3.3% of the original time, effectively maintains the stability of the voltage between the isolated grid and the detector, reduces the noise of the measured signal of the detector, shortens the voltage stabilization time of the isolated grid, accelerates the speed of the voltage on the isolated grid to reach a stable state, improves the switching speed of the detection mode of the ion mobility spectrometer, and improves the accuracy of the detection result of the ion mobility spectrum and the detection efficiency.

[0062] Referring to Figure 7 , one embodiment of the present application provides an isolated grid voltage stabilization control method based on the above-mentioned isolated grid voltage stabilization control circuit. The method comprises:

[0063] Step S701, determine the voltage type input by the voltage input end of the migration tube; the voltage type is positive high voltage or negative high voltage;

[0064] Step S702, when the voltage type is positive high voltage, the circuit composed of the second diode, the first resistor and the fourth diode is turned on, and the capacitor provides a filtering and voltage stabilizing function to reduce the voltage ripple of the isolation grid;

[0065] Step S703, when the voltage type is negative high voltage, the circuit composed of the third diode, the first resistor and the first diode is turned on, and the capacitor provides a filtering and voltage stabilizing function to reduce the voltage ripple of the isolation grid.

[0066] In this embodiment, specifically, by determining the voltage type input by the migration tube, the opening and closing of the four diodes are controlled, and then when the voltage type is positive high voltage, the circuit composed of the second diode, the first resistor and the fourth diode is turned on, and when the voltage type is negative high voltage, the circuit composed of the third diode, the first resistor and the first diode is turned on. Regardless of the voltage type, the electric field of the capacitor always remains in the same direction and does not change with the switching of the voltage type, so the capacitor does not have to be frequently charged and discharged, that is, the stability of the voltage on the isolation grid when the voltage polarity is switched is maintained. That is, when the ion mobility spectrometer switches the detection mode, the electric field of the capacitor always remains in the same direction and does not change with the switching of the detection mode, effectively maintaining the stability of the voltage between the isolation grid and the detector, effectively reducing the noise of the measurement signal of the detector. The capacitor does not have to be frequently charged and discharged, which speeds up the voltage on the isolation grid to reach a stable state, improves the switching speed of the detection mode of the ion mobility spectrometer, and further improves the accuracy of the detection result of the ion mobility spectrum and improves the detection efficiency.

[0067] Please refer to Figure 8 The device includes the following modules:

[0068] The voltage type determination module 801 determines the voltage type input by the voltage input end of the migration tube; the voltage type is positive high voltage or negative high voltage;

[0069] The first conduction module 802 is configured to, when the voltage type is positive high voltage, turn on the circuit composed of the second diode, the first resistor and the fourth diode, and the capacitor provides a filtering and voltage stabilizing function to reduce the voltage ripple of the isolation grid;

[0070] The second conduction module 803 is configured to, when the voltage type is negative high voltage, turn on a circuit composed of the third diode, the first resistor and the first diode, and the capacitor provides a filtering and stabilizing function to reduce the voltage ripple of the isolation gate.

[0071] The isolation gate voltage stabilizing control device provided in the embodiments of the present application can be applied to the isolation gate voltage stabilizing control method provided in the above-described embodiments, and the related details are referred to the above-described method embodiments, which have similar implementation principles and technical effects, and thus will not be described here again.

[0072] It should be noted that, when the isolation gate voltage stabilizing control device provided in the embodiments of the present application performs isolation gate voltage stabilizing control, only the above-described division of the functional modules / functional units is taken as an example for illustration, and in actual application, the above-described functions can be distributed to be completed by different functional modules / functional units according to needs, that is, the internal structure of the isolation gate voltage stabilizing control device is divided into different functional modules / functional units to complete all or part of the above-described functions. In addition, the technical solutions of the isolation gate voltage stabilizing control method provided in the above-described method embodiments and the technical solutions of the isolation gate voltage stabilizing control device provided in the present embodiments belong to the same concept, and the specific implementation process of the isolation gate voltage stabilizing control device provided in the present embodiments is described in the above-described method embodiments, and thus will not be described here again.

[0073] Please refer to Figure 9 It should be noted that, when the isolation gate voltage stabilizing control device provided in the embodiments of the present application performs isolation gate voltage stabilizing control, only the above-described division of the functional modules / functional units is taken as an example for illustration, and in actual application, the above-described functions can be distributed to be completed by different functional modules / functional units according to needs, that is, the internal structure of the isolation gate voltage stabilizing control device is divided into different functional modules / functional units to complete all or part of the above-described functions. In addition, the technical solutions of the isolation gate voltage stabilizing control method provided in the above-described method embodiments and the technical solutions of the isolation gate voltage stabilizing control device provided in the present embodiments belong to the same concept, and the specific implementation process of the isolation gate voltage stabilizing control device provided in the present embodiments is described in the above-described method embodiments, and thus will not be described here again.

[0074] The processor can be a central processing unit (CPU). The processor can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, graphics processing units (GPU), embedded neural network processing units (NPU) or other dedicated deep learning co-processors, discrete gate or transistor logic devices, discrete hardware components, etc. chips, or combinations of the above-mentioned chips.

[0075] The memory, as a non-transitory computer readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as program instructions / modules corresponding to the methods in the above embodiments of the present application. The processor executes various functions and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory, that is, implements the methods in the above method embodiments.

[0076] The memory can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; and the data storage area can store data created by the processor and the like. In addition, the memory can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory can optionally include a memory remotely arranged with respect to the processor, and these remote memories can be connected to the processor through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0077] The present application also provides a computer readable storage medium for storing a computer program, wherein the computer program is executed by the processor to implement the methods in the above method embodiments.

[0078] The technical scheme provided by the present application can set four diodes in the voltage stabilizing circuit, so that the electric field of the capacitor will not change with the type switching of the high voltage at the input end of the migration tube, no matter whether the type of the high voltage is positive high voltage or negative high voltage. When the type of the high voltage at the input end of the migration tube changes, the capacitor does not have to be frequently charged and discharged, that is, the stability of the voltage on the isolation grid is maintained when the voltage polarity is switched. That is, when the ion mobility spectrometer switches the detection mode, the electric field of the capacitor always remains in the same direction and will not change with the switching of the detection mode, effectively maintaining the stability of the voltage between the isolation grid and the detector, effectively reducing the noise of the measurement signal of the detector. The capacitor does not have to be frequently charged and discharged, which accelerates the stabilization time of the voltage on the isolation grid, improves the switching speed of the detection mode of the ion mobility spectrometer, and further improves the accuracy of the detection result of the ion mobility spectrum and improves the detection efficiency.

[0079] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments of the present application can be completed by instructing the relevant hardware by a computer program, and the program can be stored in a computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments of each method. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc. The storage medium can also include a combination of the above-mentioned types of memories.

[0080] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0081] Although the embodiments of the present application are described in conjunction with the drawings, it should not be understood as limiting the scope of the patent application. It should be noted that for those skilled in the art, on the basis of the above description, other different forms of changes or variations can be made without departing from the concept of the present application. Here, it is not necessary or possible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An isolated zener voltage regulator circuit, characterized by comprising: The application relates to a circuit applied to a polarity-switching ion mobility spectrometer. A first diode, a first resistor and a third diode are connected in series; the anode of the first diode is connected to the cathode of the third diode through the first resistor, the cathode of the first diode is connected to an isolated gate voltage input end, and the anode of the third diode is grounded; The cathode of a second diode is connected to the anode of a fourth diode through the first resistor, the anode of the second diode is connected to the isolated gate voltage input end, and the cathode of the fourth diode is grounded; A capacitor is connected in parallel to the two ends of the first resistor; A drift tube voltage input end is used for inputting negative high voltage or positive high voltage; A plurality of second resistors are connected in series between the drift tube voltage input end and the isolated gate voltage input end.

2. The isolated barrier voltage regulator circuit of claim 1, wherein, The resistance of the first resistor is 1 ohm-10 megohms.

3. The isolated barrier voltage regulator circuit of claim 1, wherein, The size of the capacitor is 10 pF-10 mu F.

4. The isolated barrier voltage regulator circuit of claim 1, wherein, The resistance of the second resistor is 10 K-100 M ohms; The number of the second resistors is adapted to the number of electrode rings in the drift tube.

5. The isolated barrier voltage regulator circuit of claim 1, wherein, The maximum rectification current of the first diode is the same as that of the third diode, the highest reverse working voltage of the first diode is the same as that of the third diode, and the reverse current of the first diode is the same as that of the third diode.

6. The barrier gate voltage stabilization circuit according to claim 1, wherein The maximum rectification current of the second diode is the same as that of the fourth diode, the highest reverse working voltage of the second diode is the same as that of the fourth diode, and the reverse current of the second diode is the same as that of the fourth diode.

7. A method for providing a stable voltage when the polarity of the barrier voltage is switched, using a barrier voltage stabilizing control circuit according to any one of claims 1 to 6, characterized in that The method comprises the following steps: Determining the voltage type inputted by the drift tube voltage input end; the voltage type is positive high voltage or negative high voltage; When the voltage type is positive high voltage, a circuit composed of a second diode, a first resistor and a fourth diode is turned on, and a capacitor provides a filtering and voltage stabilizing function to reduce the ripple of the isolated gate voltage; When the voltage type is negative high voltage, a circuit composed of a third diode, the first resistor and a first diode is turned on, and the capacitor still provides the filtering and voltage stabilizing function to reduce the ripple of the isolated gate voltage.

8. An isolated gate voltage stabilization control device for providing a stabilized voltage at the time of isolated gate voltage polarity switching, the isolated gate voltage stabilization control circuit according to any one of claims 1 to 6, characterized by The device comprises: A voltage type determining module for determining the voltage type inputted by the drift tube voltage input end; the voltage type is positive high voltage or negative high voltage; A first turning-on module for turning on a circuit composed of a second diode, a first resistor and a fourth diode when the voltage type is positive high voltage, and a capacitor provides a filtering and voltage stabilizing function to reduce the ripple of the isolated gate voltage; A second turning-on module for turning on a circuit composed of a third diode, the first resistor and a first diode when the voltage type is negative high voltage, and the capacitor still provides the filtering and voltage stabilizing function to reduce the ripple of the isolated gate voltage.

9. A computer device, comprising: The device comprises: A memory and a processor which are communicatively connected, and the memory stores computer instructions; the processor executes the computer instructions to realize the isolated gate voltage stabilizing control method.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are executed by the processor to implement the isolation barrier voltage stabilization control method in claim 7.

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