A power supply control circuit for a mass spectrometer

Abstract

The invention discloses a power supply control circuit for a mass spectrometer, and relates to the field of power supply. The power supply control circuit for the mass spectrometer comprises: a power supply control module, which is used to immediately output an immediate signal to a voltage conversion auxiliary module and delay outputting a delayed signal to the voltage conversion module when the working state of the mass spectrometer changes; and a voltage conversion module, which is used to change the voltage and current output to the mass spectrometer after the delayed signal is input. The beneficial effects of the invention are as follows: by setting the voltage conversion module, the voltage and current output to the mass spectrometer are changed when the working state of the mass spectrometer changes, the power consumption of the mass spectrometer is matched, and the ineffective power consumption of the mass spectrometer is reduced; and the voltage conversion auxiliary module is set to maintain the normal operation of the mass spectrometer during the change of voltage and current, thereby avoiding the situation where the voltage conversion module is insufficiently powered when the mass spectrometer changes from a low-power consumption working state to a high-power consumption working state.

Description

Technical Field

[0001] The invention relates to the field of power supply, in particular to a power supply control circuit for a mass spectrometer. Background Art

[0002] A mass spectrometer, also known as a mass spectrometer, is an instrument used to separate and detect the components of a substance. It ionizes molecules in a sample, detects the resulting ions, and separates and detects them based on their mass-to-charge ratio (m / z), thereby determining the composition of the substance.

[0003] A mass spectrometer has multiple working states, such as standby, sampling, and high-power analysis. In different working states, the power consumption required by the mass spectrometer is different. However, the existing power supply often directly supplies voltage and current according to the maximum power consumption requirement of the mass spectrometer, resulting in a large amount of ineffective power consumption of the mass spectrometer, which needs to be improved. Summary of the Invention

[0004] The object of the present invention is to provide a mass spectrometer power supply control circuit to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A mass spectrometer power supply control circuit, comprising:

[0007] The power supply control module is used to immediately output an immediate signal to the voltage conversion auxiliary module and delay output a delayed signal to the voltage conversion module when the working state of the mass spectrometer changes;

[0008] The voltage conversion module is used to change the voltage and current output to the mass spectrometer after the delay signal is input, so that the output voltage and current match the power consumption of the mass spectrometer;

[0009] The voltage conversion auxiliary module is used to output the voltage and current to the mass spectrometer to the maximum after the immediate signal input, and stop supplying power to the mass spectrometer after a delay;

[0010] The first output end of the power supply control module is connected to the voltage conversion auxiliary module, and the second output end of the power supply control module is connected to the voltage conversion module.

[0011] As a further solution of the present invention: the power supply control module includes a single-chip microcomputer, the IO1, IO2, IO3, and IO7 ports of the single-chip microcomputer output immediate signals, the IO4, IO5, and IO6 ports of the single-chip microcomputer output delayed signals, the IO1 port of the single-chip microcomputer is connected to a common point A1, the IO2 port of the single-chip microcomputer is connected to a common point A2, the IO3 port of the single-chip microcomputer is connected to a common point A3, the IO4 port of the single-chip microcomputer is connected to a common point A4, the IO5 port of the single-chip microcomputer is connected to a common point A5, the IO6 port of the single-chip microcomputer is connected to a common point A6, and the IO7 port of the single-chip microcomputer is connected to a common point A7.

[0012] As a further solution of the present invention: the voltage conversion module includes a fourth MOS transistor, a fifth MOS transistor, and a sixth MOS transistor, the D pole of the fourth MOS transistor is connected to the D pole of the fifth MOS transistor, the D pole of the sixth MOS transistor, and the power supply voltage, the S pole of the fourth MOS transistor is connected to the S pole of the fifth MOS transistor, the S pole of the sixth MOS transistor, the first capacitor, and the power supply end of the mass spectrometer, the other end of the first capacitor is grounded, the G pole of the fourth MOS transistor is connected to the common point A4, the G pole of the fifth MOS transistor is connected to the common point A5, and the G pole of the sixth MOS transistor is connected to the common point A6.

[0013] As a further solution of the present invention: the voltage conversion auxiliary module includes:

[0014] An input drive unit is used to drive the auxiliary power supply unit to work after receiving an immediate signal;

[0015] The auxiliary power supply unit is used to supply the mass spectrometer with the maximum voltage and current when working; and to ensure that the voltage and current supplied to the mass spectrometer meet the working requirements of the mass spectrometer when the working state of the mass spectrometer is switched;

[0016] The delay control unit is used to start timing after receiving the immediate signal, and control the input drive unit to stop working after the set time is reached;

[0017] The first input end of the input drive unit is connected to the first output end of the power supply control module and the input end of the delay control unit, the output end of the input drive unit is connected to the input end of the auxiliary power supply unit, and the output end of the delay control unit is connected to the second input end of the input drive unit.

[0018] As a further embodiment of the present invention, the input drive unit includes a first diode, a second diode, a third diode, a first resistor, an eighth transistor, a second resistor, a third resistor, a third capacitor, a fifth diode, a ninth transistor, and a seventh transistor. The anode of the first diode is connected to a common point A1, the anode of the second diode is connected to a common point A2, the anode of the third diode is connected to a common point A3, the cathode of the first diode is connected to the cathode of the second diode, the cathode of the third diode, the collector of the seventh transistor, and one end of the first resistor, the other end of the first resistor is connected to the base of the eighth transistor and the input end of the auxiliary power supply unit, the collector of the eighth transistor is connected to the supply voltage through the third resistor, the emitter of the eighth transistor is connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third capacitor, the cathode of the fifth diode, the collector of the ninth transistor, and the input end of the auxiliary power supply unit, the other end of the third capacitor is grounded, the anode of the fifth diode is grounded, the emitter of the ninth transistor is grounded, the base of the ninth transistor is connected to the base of the seventh transistor and the output end of the delay control unit, and the emitter of the seventh transistor is grounded.

[0019] As a further solution of the present invention: the auxiliary power supply unit includes an eleventh MOS tube, a first thyristor, a fourth diode, and a second capacitor, the D pole of the eleventh MOS tube is connected to the power supply voltage, the G pole of the eleventh MOS tube is connected to the output end of the input drive unit, the S pole of the eleventh MOS tube is connected to the positive pole of the first thyristor, the control pole of the first thyristor is connected to the output end of the input drive unit, the cathode of the first thyristor is connected to the positive pole of the fourth diode, the cathode of the fourth diode is connected to one end of the second capacitor and the power supply end of the mass spectrometer, and the other end of the second capacitor is grounded.

[0020] As a further solution of the present invention: the delay control unit includes a first transistor, a second transistor, a third transistor, a first potentiometer, a fourth resistor, a fourth capacitor, a sixth diode, and a tenth transistor. The collector of the first transistor is connected to the collector of the second transistor, the collector of the third transistor, and the supply voltage. The base of the first transistor is connected to a common point A1, the base of the second transistor is connected to a common point A2, and the base of the third transistor is connected to a common point A3. The emitter of the first transistor is connected to the emitter of the second transistor, the emitter of the third transistor, and one end of the first potentiometer. The other end of the first potentiometer is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the fourth capacitor, the cathode of the sixth diode, and the collector of the tenth transistor. The other end of the fourth capacitor is grounded. The anode of the sixth diode is connected to the second input end of the input drive unit. The emitter of the tenth transistor is grounded. The base of the tenth transistor is connected to a common point A7.

[0021] As a further solution of the present invention: the mass spectrometer power supply control circuit further includes a voltage detection module, which includes:

[0022] The voltage detection unit is used to detect whether the supply voltage of the voltage conversion module meets the working requirements of the mass spectrometer when the mass spectrometer is in different working states. If not, the alarm prompt unit is triggered to work;

[0023] Alarm prompt unit, used for beeping prompts during operation;

[0024] The first input end of the voltage detection unit is connected to the output end of the voltage conversion module, the second input end of the voltage detection unit is connected to the second output end of the power supply control module, and the output end of the voltage detection unit is connected to the input end of the alarm prompt unit.

[0025] As a further embodiment of the present invention, the voltage detection unit includes a twelfth MOS transistor, a thirteenth MOS transistor, a fourteenth MOS transistor, a second amplifier, and three filtering and voltage-stabilizing structures. The D pole of the twelfth MOS transistor is connected to the first reference voltage, the D pole of the thirteenth MOS transistor is connected to the second reference voltage, and the D pole of the fourteenth MOS transistor is connected to the third reference voltage. The S pole of the twelfth MOS transistor is connected to the S pole of the thirteenth MOS transistor, the S pole of the fourteenth MOS transistor, and the inverting terminal of the second amplifier. The non-inverting terminal of the second amplifier is connected to the power supply terminal (voltage VOUT) of the mass spectrometer. The output terminal of the second amplifier is connected to the input terminal of the alarm prompt unit. The G poles of the twelfth MOS transistor, the G poles of the thirteenth MOS transistor, and the G poles of the fourteenth MOS transistor are respectively connected to common points A4, A5, and A6 via a filtering and voltage-stabilizing structure. The filtering and voltage-stabilizing structure includes a seventh diode, a fifth capacitor, and a fifth resistor. One end of the fifth resistor is connected to the corresponding common point, and the other end of the fifth resistor is connected to one end of the fifth capacitor, the cathode of the seventh diode, and the G pole of the corresponding MOS transistor. The other end of the fifth capacitor is grounded, and the anode of the seventh diode is grounded.

[0026] As a further solution of the present invention: the alarm prompt unit includes an eighth resistor, a ninth resistor, and a buzzer, one end of the eighth resistor is connected to the power supply voltage, the other end of the eighth resistor is connected to one end of the buzzer, the other end of the buzzer is connected to one end of the ninth resistor and the output end of the voltage detection unit, and the other end of the ninth resistor is grounded.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a voltage conversion module to change the voltage and current output to the mass spectrometer when the working state of the mass spectrometer changes, thereby matching the power consumption of the mass spectrometer and reducing the ineffective power consumption of the mass spectrometer; and provides a voltage conversion auxiliary module to maintain the normal operation of the mass spectrometer during the voltage and current change process, thereby avoiding the situation where the voltage conversion module is insufficiently powered when the mass spectrometer is converted from a low-power consumption working state to a high-power consumption working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a power supply control circuit for a mass spectrometer.

[0029] Figure 2 This is the schematic diagram of the voltage conversion auxiliary module.

[0030] Figure 3 This is the schematic diagram of the voltage detection module.

[0031] Figure 4 This is the circuit diagram of the power supply control module.

[0032] Figure 5 This is the circuit diagram of the voltage conversion module.

[0033] Figure 6 This is the circuit diagram of the voltage conversion auxiliary module.

[0034] Figure 7 This is the circuit diagram of the voltage detection module. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 , a mass spectrometer power supply control circuit, comprising:

[0037] The power supply control module 1 is used to immediately output an immediate signal to the voltage conversion auxiliary module 3 and delay output a delayed signal to the voltage conversion module 2 when the working state of the mass spectrometer changes;

[0038] Voltage conversion module 2, used to change the voltage and current output to the mass spectrometer after the delay signal is input, so that the output voltage and current match the power consumption of the mass spectrometer;

[0039] The voltage conversion auxiliary module 3 is used to output the voltage and current to the mass spectrometer to the maximum after the immediate signal input, and stop supplying power to the mass spectrometer after a delay;

[0040] The first output end of the power supply control module 1 is connected to the voltage conversion auxiliary module 3 , and the second output end of the power supply control module 1 is connected to the voltage conversion module 2 .

[0041] In this example: See Figure 4The power supply control module 1 includes a single-chip microcomputer U1. The IO1, IO2, IO3, and IO7 ports of the single-chip microcomputer U1 output immediate signals, and the IO4, IO5, and IO6 ports of the single-chip microcomputer U1 output delayed signals. The IO1 port of the single-chip microcomputer U1 is connected to a common point A1, the IO2 port of the single-chip microcomputer U1 is connected to a common point A2, the IO3 port of the single-chip microcomputer U1 is connected to a common point A3, the IO4 port of the single-chip microcomputer U1 is connected to a common point A4, the IO5 port of the single-chip microcomputer U1 is connected to a common point A5, the IO6 port of the single-chip microcomputer U1 is connected to a common point A6, and the IO7 port of the single-chip microcomputer U1 is connected to a common point A7.

[0042] Microcontroller U1, the main control chip of the mass spectrometer, provides several additional IO ports to reflect the instrument's operating status. Here, standby, sampling, and high-power analysis are used as examples. Therefore, three immediate signals (IO1, IO2, and IO3) are designed, along with three delayed signals corresponding to these immediate signals (IO4, IO5, and IO6). When IO1, IO2, or IO3 of MCU U1 output an immediate signal (a continuous signal), IO7 also outputs an immediate signal. This signal is a momentary high level that disappears after a short time. For example, when MCU U1 is controlling the mass spectrometer in standby mode, IO1 immediately outputs a high level, while IO7 also outputs a momentary high level. After a delay, IO4 outputs a square wave signal to adjust voltage VOUT, thereby changing the voltage and current supplied to the mass spectrometer's power supply until the mass spectrometer's operating state changes. Similarly, when the single-chip computer U1 controls the sampling of the mass spectrometer, the IO2, IO7, and IO5 ports also work accordingly. When the single-chip computer U1 controls the high-power analysis of the mass spectrometer, the IO3, IO7, and IO6 ports also work accordingly. The difference is that the duty cycles of the output square wave signals of IO4, IO5, and IO6 are different, and the voltage and current output to the power supply end of the mass spectrometer are different.

[0043] In another embodiment: Here, seven IO ports are designed by taking the working states of standby, sampling, high power analysis, etc. as examples. In actual use, there is no restriction on the working state and IO ports.

[0044] In this example: See Figure 5The voltage conversion module 2 includes a fourth MOS transistor V4, a fifth MOS transistor V5, and a sixth MOS transistor V6. The D electrode of the fourth MOS transistor V4 is connected to the D electrode of the fifth MOS transistor V5, the D electrode of the sixth MOS transistor V6, and the power supply voltage VCC. The S electrode of the fourth MOS transistor V4 is connected to the S electrode of the fifth MOS transistor V5, the S electrode of the sixth MOS transistor V6, the first capacitor C1, and the power supply end of the mass spectrometer. The other end of the first capacitor C1 is grounded. The G electrode of the fourth MOS transistor V4 is connected to the common point A4, the G electrode of the fifth MOS transistor V5 is connected to the common point A5, and the G electrode of the sixth MOS transistor V6 is connected to the common point A6.

[0045] Square wave signals with different duty cycles output from the IO4, IO5, and IO6 ports of the single-chip computer U1 are output to the common points A4, A5, and A6, respectively, to control the conduction status of the fourth MOS transistor V4, the fifth MOS transistor V5, and the sixth MOS transistor V6, change the voltage and current output to the power supply terminal of the mass spectrometer, match the power consumption of the mass spectrometer in different working states, and reduce the ineffective power consumption of the mass spectrometer. The ineffective power consumption is the electrical energy consumed by non-core working components in the mass spectrometer, such as resistors used for voltage division and current limiting.

[0046] In another embodiment, a first capacitor C1 is provided for filtering to ensure that the voltage VOUT output to the power supply terminal of the mass spectrometer is stable. Multiple capacitors may be provided to ensure the filtering effect.

[0047] In this example: See Figure 2 , the voltage conversion auxiliary module 3 includes:

[0048] The input drive unit 31 is used to drive the auxiliary power supply unit 32 to work after receiving the immediate signal;

[0049] The auxiliary power supply unit 32 is used to supply the mass spectrometer with a maximum voltage and current when working; and to ensure that the voltage and current supplied to the mass spectrometer meet the working requirements of the mass spectrometer when the working state of the mass spectrometer is switched;

[0050] The delay control unit 33 is used to start timing after receiving the immediate signal, and control the input drive unit 31 to stop working after the set time is reached;

[0051] The first input end of the input drive unit 31 is connected to the first output end of the power supply control module 1 and the input end of the delay control unit 33, the output end of the input drive unit 31 is connected to the input end of the auxiliary power supply unit 32, and the output end of the delay control unit 33 is connected to the second input end of the input drive unit 31.

[0052] In this example: See Figure 6The input drive unit 31 includes a first diode D1, a second diode D2, a third diode D3, a first resistor R1, an eighth transistor V8, a second resistor R2, a third resistor R3, a third capacitor C3, a fifth diode D5, a ninth transistor V9, and a seventh transistor V7. The anode of the first diode D1 is connected to a common point A1, the anode of the second diode D2 is connected to a common point A2, the anode of the third diode D3 is connected to a common point A3, the cathode of the first diode D1 is connected to the cathode of the second diode D2, the cathode of the third diode D3, the collector of the seventh transistor V7, and one end of the first resistor R1. The other end of the first resistor R1 is connected to the eighth transistor The base of the eighth transistor V8 is connected to the input end of the auxiliary power supply unit 32, the collector of the eighth transistor V8 is connected to the supply voltage VCC through the third resistor R3, the emitter of the eighth transistor V8 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third capacitor C3, the cathode of the fifth diode D5, the collector of the ninth transistor V9, and the input end of the auxiliary power supply unit 32, the other end of the third capacitor C3 is grounded, the anode of the fifth diode D5 is grounded, the emitter of the ninth transistor V9 is grounded, the base of the ninth transistor V9 is connected to the base of the seventh transistor V7 and the output end of the delay control unit 33, and the emitter of the seventh transistor V7 is grounded.

[0053] When the common point A1 or A2 or A3 is at a high level, the eighth transistor V8 is turned on, and the supply voltage VCC passes through the third resistor R3, the eighth transistor V8, and the second resistor R2, and is clamped by the fifth diode D5 (Zener diode), outputting a stable voltage to drive the auxiliary power supply unit 32 to work.

[0054] In another embodiment, the fifth diode D5 may be replaced with a voltage stabilizer. Here, it is only necessary to ensure that the voltage passing through the fifth diode D5 is sufficient to drive the auxiliary power supply unit 32 to work. Therefore, the fifth diode D5 is sufficient for use.

[0055] In this example: See Figure 6 The auxiliary power supply unit 32 includes an eleventh MOS transistor V11, a first thyristor Z1, a fourth diode D4, and a second capacitor C2. The D electrode of the eleventh MOS transistor V11 is connected to the power supply voltage VCC, the G electrode of the eleventh MOS transistor V11 is connected to the output end of the input drive unit 31, the S electrode of the eleventh MOS transistor V11 is connected to the anode of the first thyristor Z1, the control electrode of the first thyristor Z1 is connected to the output end of the input drive unit 31, the cathode of the first thyristor Z1 is connected to the anode of the fourth diode D4, the cathode of the fourth diode D4 is connected to one end of the second capacitor C2 and the power supply end of the mass spectrometer, and the other end of the second capacitor C2 is grounded.

[0056] When the input drive unit 31 is working, the first thyristor Z1 is turned on, the G terminal of the eleventh MOS transistor V11 is at a high level, and the eleventh MOS transistor V11 is also turned on. The supply voltage VCC outputs the voltage VOUT to the power supply terminal of the mass spectrometer through the eleventh MOS transistor V11, the first thyristor Z1, the fourth diode D4, and the second capacitor C2. At this time, the voltage and current output to the power supply terminal of the mass spectrometer are the maximum.

[0057] In another embodiment, the eleventh MOS transistor V11 and the first thyristor Z1 may be replaced with specific switches.

[0058] In this example: See Figure 6 The delay control unit 33 includes a first transistor V1, a second transistor V2, a third transistor V3, a first potentiometer RP1, a fourth resistor R4, a fourth capacitor C4, a sixth diode D6, and a tenth transistor V10. The collector of the first transistor V1 is connected to the collector of the second transistor V2, the collector of the third transistor V3, and the power supply voltage VCC. The base of the first transistor V1 is connected to the common point A1, the base of the second transistor V2 is connected to the common point A2, and the base of the third transistor V3 is connected to the common point A3. The emitter of the first transistor V1 is connected to the common point A1. The emitter is connected to the emitter of the second transistor V2, the emitter of the third transistor V3, and one end of the first potentiometer RP1. The other end of the first potentiometer RP1 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to one end of the fourth capacitor C4, the cathode of the sixth diode D6, and the collector of the triode V10. The other end of the fourth capacitor C4 is grounded. The anode of the sixth diode D6 is connected to the second input end of the input drive unit 31. The emitter of the triode V10 is grounded. The base of the triode V10 is connected to the common point A7.

[0059] When the common point A1, A2, or A3 is at a high level, the supply voltage VCC charges the fourth capacitor C4 through the first transistor V1, the second transistor V2, or the third transistor V3, the first potentiometer RP1, and the fourth resistor R4. When the fourth capacitor C4 is charged to a level sufficient to turn on the sixth diode D6 (voltage regulator diode), a high level is output to the input drive unit 31, and the ninth transistor V9 and the seventh transistor V7 are turned on and grounded, controlling the input drive unit 31 to stop working.

[0060] For example, the mass spectrometer is in standby mode at the beginning (there is a square wave signal at the common point A4), and now it becomes a sampling mode, there is no square wave signal at the common point A4 anymore, the common points A2 and A7 become high level, and there is a square wave signal at the common point A5 after a delay, and the common point A7 is an instantaneous high level, driving the tenth transistor V10 to be turned on and grounded, discharging the voltage on the fourth capacitor C4, the seventh transistor V7 and the ninth transistor V9 are turned on, and the input drive unit 31 resumes work. At this time, the high level of the common point A2 drives the auxiliary power supply unit 32 to work through the input drive unit 31. During the switching of the working state of the mass spectrometer, the voltage and current supplied to the mass spectrometer are the largest, ensuring the normal operation of the mass spectrometer during the switching of the working state. The common point A2 is a high level, the second transistor V2 is turned on, and the fourth capacitor C4 is charged. When capacitor C4 is charged enough to turn on the sixth diode D6, the input drive unit 31 stops working and the auxiliary power supply unit 32 stops working. Prior to this, the common point A5 has output a square wave signal to control the conduction of the fifth MOS tube V5, providing the mass spectrometer with a voltage and current that match the sampling state. When the mass spectrometer switches to the high-power analysis state, the common point A5 no longer has a square wave signal, the common points A3 and A7 become high levels, and the common point A6 has a square wave signal after a delay. The working principle is similar to that of the mass spectrometer switching to the sampling state. During the switching process, based on the common points A3 and A7, the maximum voltage and current are output to ensure the normal operation of the mass spectrometer during the switching. After the delay, the square wave signal on the common point A6 makes the voltage and current output through the sixth MOS tube V6 match the power consumption of the mass spectrometer in the high-power analysis state.

[0061] In another embodiment, in actual use, taking into account factors such as errors, the voltage and current output to the mass spectrometer can be appropriately increased compared to the voltage and current required by the mass spectrometer in a corresponding state.

[0062] In this example: See Figure 3 The mass spectrometer power supply control circuit further includes a voltage detection module 4, which includes:

[0063] The voltage detection unit 41 is used to detect whether the supply voltage of the voltage conversion module 2 meets the working requirements of the mass spectrometer when the mass spectrometer is in different working states. If not, the alarm prompt unit 42 is triggered to work;

[0064] An alarm prompt unit 42 is used to sound a warning during operation;

[0065] The first input end of the voltage detection unit 41 is connected to the output end of the voltage conversion module 2 , the second input end of the voltage detection unit 41 is connected to the second output end of the power supply control module 1 , and the output end of the voltage detection unit 41 is connected to the input end of the alarm prompt unit 42 .

[0066] In this example: See Figure 7 The voltage detection unit 41 includes a twelfth MOS transistor V12, a thirteenth MOS transistor V13, a fourteenth MOS transistor V14, a second amplifier U2, and three filtering and voltage stabilization structures. The D-pole of the twelfth MOS transistor V12 is connected to the first reference voltage VREF1, the D-pole of the thirteenth MOS transistor V13 is connected to the second reference voltage VREF2, the D-pole of the fourteenth MOS transistor V14 is connected to the third reference voltage VREF3, the S-pole of the twelfth MOS transistor V12 is connected to the S-pole of the thirteenth MOS transistor V13, the S-pole of the fourteenth MOS transistor V14, and the inverting terminal of the second amplifier U2, and the non-inverting terminal of the second amplifier U2 is connected to the power supply terminal (voltage V OUT), the output end of the second amplifier U2 is connected to the input end of the alarm prompt unit 42, the G poles of the twelfth MOS transistor V12, the G poles of the thirteenth MOS transistor V13, and the G poles of the fourteenth MOS transistor V14 are respectively connected to the common point A4, the common point A5, and the common point A6 via a filtering and voltage stabilizing structure. The filtering and voltage stabilizing structure includes a seventh diode D7, a fifth capacitor C5, and a fifth resistor R5. One end of the fifth resistor R5 is connected to the corresponding common point, and the other end of the fifth resistor R5 is connected to one end of the fifth capacitor C5, the cathode of the seventh diode D7, and the G pole of the corresponding MOS transistor. The other end of the fifth capacitor C5 is grounded, and the anode of the seventh diode D7 is grounded.

[0067] In order to ensure that the voltage and current output to the mass spectrometer match the required power consumption of the mass spectrometer, a voltage detection unit 41 is provided. In the standby state, the voltage VOUT should be greater than the first reference voltage VREF1. In the sampling state, the voltage VOUT should be greater than the second reference voltage VREF2. In the high-power analysis state, the voltage VOUT should be greater than the third reference voltage VREF3. Taking the standby state as an example, a square wave signal is present at the common point A4. After passing through the fifth resistor R5 and the fifth capacitor C5, a fixed voltage is formed on the seventh diode D7 (Zener diode), driving the twelfth MOS transistor V12 to turn on. At this time, the non-inverting terminal of the second amplifier U2 is at the voltage VOUT, and the inverting terminal voltage is the first reference voltage VREF1. The principle is similar. In the sampling state, the non-inverting terminal of the second amplifier U2 is at the voltage VOUT, and the inverting terminal voltage is the second reference voltage VREF2. In the high-power analysis state, the non-inverting terminal of the second amplifier U2 is at the voltage VOUT, and the inverting terminal voltage is the third reference voltage VREF3. Therefore, when the voltage conversion module 2 works normally, the voltage VOUT is normal, which is sufficient to ensure the normal operation of the mass spectrometer, and the second amplifier U2 outputs a high level. Conversely, when the voltage VOUT is too small to maintain the normal operation of the mass spectrometer, the second amplifier U2 outputs a low level.

[0068] In another embodiment, the first reference voltage VREF1 , the second reference voltage VREF2 , and the third reference voltage VREF3 can be obtained by dividing a fixed voltage by resistors.

[0069] In this example: See Figure 7 The alarm prompt unit 42 includes an eighth resistor R8, a ninth resistor R9, and a buzzer BUZZ. One end of the eighth resistor R8 is connected to the power supply voltage VCC, the other end of the eighth resistor R8 is connected to one end of the buzzer BUZZ, the other end of the buzzer BUZZ is connected to one end of the ninth resistor R9 and the output end of the voltage detection unit 41, and the other end of the ninth resistor R9 is grounded.

[0070] When the second amplifier U2 outputs a high level, the voltage difference across the buzzer BUZZ is insufficient to drive the buzzer BUZZ to work. When the second amplifier U2 outputs a low level, the voltage difference across the buzzer BUZZ is sufficient to trigger the buzzer BUZZ to work, and the buzzer will sound to indicate power supply abnormality.

[0071] In another embodiment, a voltage stabilizing diode may be connected in parallel to the buzzer BUZZ to prevent the buzzer from being triggered incorrectly.

[0072] The working principle of the present invention is: the power supply control module 1 is used to immediately output an immediate signal to the voltage conversion auxiliary module 3 when the working state of the mass spectrometer changes, and delay the output of the delayed signal to the voltage conversion module 2; the voltage conversion module 2 is used to change the voltage and current output to the mass spectrometer after the delay signal is input, so that the output voltage and current match the power consumption of the mass spectrometer; the voltage conversion auxiliary module 3 is used to output the voltage and current to the mass spectrometer to the maximum after the immediate signal is input, and stop powering the mass spectrometer after the delay.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0074] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A mass spectrometer power supply control circuit, characterized in that: The mass spectrometer power supply control circuit includes: The power supply control module is used to immediately output an immediate signal to the voltage conversion auxiliary module and delay output a delayed signal to the voltage conversion module when the working state of the mass spectrometer changes; A voltage conversion module is used to change the voltage and current output to the mass spectrometer after the delay signal is input, so that the output voltage and current match the power consumption of the mass spectrometer; The voltage conversion auxiliary module is used to output the voltage and current to the mass spectrometer to the maximum after the immediate signal input, and stop supplying power to the mass spectrometer after a delay; The first output terminal of the power supply control module is connected to the voltage conversion auxiliary module, and the second output terminal of the power supply control module is connected to the voltage conversion module; The voltage conversion auxiliary module includes: An input drive unit is used to drive the auxiliary power supply unit to work after receiving an immediate signal; The auxiliary power supply unit is used to supply the mass spectrometer with the maximum voltage and current when working; and to ensure that the voltage and current supplied to the mass spectrometer meet the working requirements of the mass spectrometer when the working state of the mass spectrometer is switched; The delay control unit is used to start timing after receiving the immediate signal, and control the input drive unit to stop working after the set time is reached; The first input end of the input drive unit is connected to the first output end of the power supply control module and the input end of the delay control unit, the output end of the input drive unit is connected to the input end of the auxiliary power supply unit, and the output end of the delay control unit is connected to the second input end of the input drive unit; The input drive unit includes a first diode, a second diode, a third diode, a first resistor, an eighth transistor, a second resistor, a third resistor, a third capacitor, a fifth diode, a ninth transistor, and a seventh transistor. The anode of the first diode is connected to a common point A1, the anode of the second diode is connected to a common point A2, the anode of the third diode is connected to a common point A3, the cathode of the first diode is connected to the cathode of the second diode, the cathode of the third diode, the collector of the seventh transistor, and one end of the first resistor, the other end of the first resistor is connected to the base of the eighth transistor and the input end of the auxiliary power supply unit, the collector of the eighth transistor is connected to the supply voltage through the third resistor, the emitter of the eighth transistor is connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third capacitor, the cathode of the fifth diode, the collector of the ninth transistor, and the input end of the auxiliary power supply unit, the other end of the third capacitor is grounded, the anode of the fifth diode is grounded, the emitter of the ninth transistor is grounded, the base of the ninth transistor is connected to the base of the seventh transistor and the output end of the delay control unit, and the emitter of the seventh transistor is grounded.

2. The mass spectrometer power supply control circuit according to claim 1, characterized in that: The power supply control module includes a single-chip microcomputer. The IO1, IO2, IO3, and IO7 ports of the single-chip microcomputer output immediate signals, and the IO4, IO5, and IO6 ports of the single-chip microcomputer output delayed signals. The IO1 port of the single-chip microcomputer is connected to the common point A1, the IO2 port of the single-chip microcomputer is connected to the common point A2, the IO3 port of the single-chip microcomputer is connected to the common point A3, the IO4 port of the single-chip microcomputer is connected to the common point A4, the IO5 port of the single-chip microcomputer is connected to the common point A5, the IO6 port of the single-chip microcomputer is connected to the common point A6, and the IO7 port of the single-chip microcomputer is connected to the common point A7.

3. The mass spectrometer power supply control circuit according to claim 1, characterized in that: The voltage conversion module includes a fourth MOS tube, a fifth MOS tube, and a sixth MOS tube. The D pole of the fourth MOS tube is connected to the D pole of the fifth MOS tube, the D pole of the sixth MOS tube, and the power supply voltage. The S pole of the fourth MOS tube is connected to the S pole of the fifth MOS tube, the S pole of the sixth MOS tube, the first capacitor, and the power supply end of the mass spectrometer. The other end of the first capacitor is grounded. The G pole of the fourth MOS tube is connected to the common point A4, the G pole of the fifth MOS tube is connected to the common point A5, and the G pole of the sixth MOS tube is connected to the common point A6.

4. The mass spectrometer power supply control circuit according to claim 1, characterized in that: The auxiliary power supply unit includes an eleventh MOS tube, a first thyristor, a fourth diode, and a second capacitor. The D pole of the eleventh MOS tube is connected to the power supply voltage, the G pole of the eleventh MOS tube is connected to the output end of the input drive unit, the S pole of the eleventh MOS tube is connected to the positive pole of the first thyristor, the control pole of the first thyristor is connected to the output end of the input drive unit, the negative pole of the first thyristor is connected to the positive pole of the fourth diode, the negative pole of the fourth diode is connected to one end of the second capacitor and the power supply end of the mass spectrometer, and the other end of the second capacitor is grounded.

5. The mass spectrometer power supply control circuit according to claim 1, characterized in that: The delay control unit includes a first triode, a second triode, a third triode, a first potentiometer, a fourth resistor, a fourth capacitor, a sixth diode, and a tenth triode. The collector of the first triode is connected to the collector of the second triode, the collector of the third triode, and the power supply voltage. The base of the first triode is connected to a common point A1, the base of the second triode is connected to a common point A2, and the base of the third triode is connected to a common point A3. The emitter of the first triode is connected to the emitter of the second triode, the emitter of the third triode, and one end of the first potentiometer. The other end of the first potentiometer is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the fourth capacitor, the cathode of the sixth diode, and the collector of the tenth triode. The other end of the fourth capacitor is grounded. The anode of the sixth diode is connected to the second input end of the input drive unit. The emitter of the tenth triode is grounded. The base of the tenth triode is connected to a common point A7.

6. The mass spectrometer power supply control circuit according to claim 1, characterized in that: The mass spectrometer power supply control circuit further includes a voltage detection module, which includes: The voltage detection unit is used to detect whether the supply voltage of the voltage conversion module meets the working requirements of the mass spectrometer when the mass spectrometer is in different working states. If not, the alarm prompt unit is triggered to work; Alarm prompt unit, used for beeping prompts during operation; The first input end of the voltage detection unit is connected to the output end of the voltage conversion module, the second input end of the voltage detection unit is connected to the second output end of the power supply control module, and the output end of the voltage detection unit is connected to the input end of the alarm prompt unit.

7. The mass spectrometer power supply control circuit according to claim 6, characterized in that: The voltage detection unit includes a twelfth MOS transistor, a thirteenth MOS transistor, a fourteenth MOS transistor, a second amplifier, and three filtering and voltage-stabilizing structures. The D pole of the twelfth MOS transistor is connected to the first reference voltage, the D pole of the thirteenth MOS transistor is connected to the second reference voltage, and the D pole of the fourteenth MOS transistor is connected to the third reference voltage. The S pole of the twelfth MOS transistor is connected to the S pole of the thirteenth MOS transistor, the S pole of the fourteenth MOS transistor, and the inverting terminal of the second amplifier. The non-inverting terminal of the second amplifier is connected to the power supply terminal of the mass spectrometer. The output terminal of the second amplifier is connected to the input terminal of the alarm prompt unit. The G poles of the twelfth MOS transistor, the G poles of the thirteenth MOS transistor, and the G poles of the fourteenth MOS transistor are respectively connected to common points A4, A5, and A6 via a filtering and voltage-stabilizing structure. The filtering and voltage-stabilizing structure includes a seventh diode, a fifth capacitor, and a fifth resistor. One end of the fifth resistor is connected to the corresponding common point, the other end of the fifth resistor is connected to one end of the fifth capacitor, the cathode of the seventh diode, and the G pole of the corresponding MOS transistor. The other end of the fifth capacitor is grounded, and the anode of the seventh diode is grounded.

8. The mass spectrometer power supply control circuit according to claim 6 or 7, characterized in that: The alarm prompt unit includes an eighth resistor, a ninth resistor, and a buzzer. One end of the eighth resistor is connected to the power supply voltage, the other end of the eighth resistor is connected to one end of the buzzer, the other end of the buzzer is connected to one end of the ninth resistor and the output end of the voltage detection unit, and the other end of the ninth resistor is grounded.

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