Power switching circuit and power supply device of mass spectrometer

Abstract

The utility model discloses a power supply switching circuit and a power supply device of a mass spectrometer, and relates to the field of circuits, when a first power supply is disconnected, a first control switch is switched off, and when a second power supply is electrified, a time delay module is switched on, a second control switch is switched on, and the second power supply is controlled to start to supply power. The second power supply is introduced to serve as a standby power supply, and the delay module is introduced to avoid simultaneous power supply possibly caused when the two power supplies are turned on at the same time, so that the two power supplies are prevented from crossing at the moment of turning on, and sufficient time is reserved to control the second control switch; the mass spectrometer is prevented from being damaged by secondary impact generated by power supply switching at the starting moment, the problem of identification failure caused by damage of a power supply module in the microbiological identification process of the mass spectrometer is solved, the condition of secondary identification is avoided, the risk of microbiological sample failure caused by maintenance time is further avoided, and the safety of microbiological identification is improved. And reliable and continuous work of the mass spectrometer in the identification process is ensured.

Description

Technical Field

[0001] The utility model relates to the field of circuits, in particular to a power switching circuit and a power supply device of a mass spectrometer. Background Art

[0002] As a modern electronic instrument, mass spectrometer is widely used to measure the molecular weight and molecular structure of substances, especially in the identification of microorganisms, and its application prospects are very broad. The use of mass spectrometer for microbial identification is a very complex and time-consuming process. During the identification process, the mass spectrometer needs to keep working continuously and the work of the mass spectrometer cannot be interrupted. Therefore, the requirements for the power supply of the mass spectrometer are getting higher and higher.

[0003] The mass spectrometer in the prior art directly uses an AC-DC (Alternating Current-Direct Current, AC-DC) power supply module to power its main control system. The AC-DC power supply module converts the main power 220V into low-voltage direct current and directly supplies it to the mass spectrometer. However, the AC-DC power supply module is very likely to be damaged under the conditions of power grid impact, excessive ambient temperature, excessive load, harmonic influence, etc. At the same time, the AC-DC power supply module is used as the power supply device of the main control system of the mass spectrometer. During the microbial identification process, once the AC-DC power supply module is damaged, the mass spectrometer will immediately lose power and stop running, the identification process will be interrupted, and the consequences of the failure of the microbial identification will be caused. This is unacceptable for the application requirements that require a complete microbial identification result. When this kind of fault occurs, in some cases, the microbial identification process can be continued by performing a secondary identification, but this method will cause the entire identification time to be longer; and in some more serious cases, if the AC-DC power supply module is not repaired in time, there may be a risk of microbial sample failure, resulting in the inability to complete the entire identification process. How to ensure the continuous operation of the mass spectrometer has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the utility model is to provide a power switching circuit and a power supply device for a mass spectrometer, which introduces a second power supply as a backup power supply and introduces a delay module to avoid simultaneous power supply that may be caused when two power supplies are turned on at the same time, avoid crossover when the two power supplies are turned on, leave sufficient time to control the second control switch, and avoid damage to the mass spectrometer due to secondary impact caused by power switching at the moment of turning on, solve the problem of failure of the mass spectrometer in the process of microbial identification due to damage to the power module, avoid secondary identification, and avoid the risk of microbial sample failure caused by maintenance time, thereby ensuring reliable and continuous operation of the mass spectrometer during the identification process.

[0005] In order to solve the above technical problems, the utility model provides a power switching circuit, comprising:

[0006] A first control switch, whose input end is connected to the first power supply and serves as the output end of the power switching circuit, and is used to be turned on when the first power supply is powered on, and turned off when the first power supply is not powered on;

[0007] A delay module, the input end of which is connected to the second power supply, and the output end of which is respectively connected to the first output end of the first control switch and the control end of the second control switch, and is used to turn on after a preset delay when the second power supply is powered on, and to turn off when the second power supply is not powered on;

[0008] The second control switch has a first end connected to the second power supply and connected to the second output end of the first control switch, and a second end connected to the output end of the power switching circuit, and is used to be turned on when the delay module is turned on and the first control switch is turned off, and turned off when the first control switch is turned on.

[0009] Optionally, the power switching circuit further includes:

[0010] a first resistor, a first end of which is connected to a first power supply, and a second end of which is connected to a first input end of the first control switch;

[0011] The second resistor has a first end connected to the second input end of the first control switch and a second end grounded.

[0012] Optionally, the power switching circuit further includes:

[0013] A third resistor has a first end connected to the first output end of the first control switch and the output end of the delay module respectively, and a second end connected to the control end of the second control switch.

[0014] Optionally, the power switching circuit further includes:

[0015] The first unidirectional conducting module has a positive electrode connected to the first end of the first resistor and the first power supply respectively, and a negative electrode serving as an output end of the power switching circuit.

[0016] Optionally, the power switching circuit further includes:

[0017] The second unidirectional conducting module has a positive electrode connected to the second end of the second control switch and a negative electrode serving as an output end of the power switching circuit.

[0018] Optionally, the delay module includes:

[0019] a fourth resistor, a first end of which is respectively connected to the first end of the second control switch and the second power supply;

[0020] A capacitor, a first end of which is grounded;

[0021] A third control switch, wherein the control end is respectively connected to the second end of the fourth resistor and the second end of the capacitor, the first end is grounded and connected to the first end of the capacitor, and the second end serves as the output end of the delay module, and is used to be turned on after a preset delay time when the second power supply is powered on, and to be turned off when the second power supply is not powered on.

[0022] Optionally, the delay module further includes:

[0023] A fifth resistor has a first end connected to the second end of the fourth resistor and the second end of the capacitor respectively, and a second end connected to the ground and to the first end of the capacitor and the first end of the third control switch respectively.

[0024] Optionally, the delay module further includes:

[0025] A sixth resistor, wherein a first end is respectively connected to the first end of the second control switch, the first end of the fourth resistor and the second power supply, and a second end is respectively connected to the second end of the third control switch, the first output end of the first control switch and the control end of the second control switch.

[0026] Optionally, the delay module further includes:

[0027] A seventh resistor has a first end connected to the second end of the sixth resistor, the first output end of the first control switch and the control end of the second control switch respectively, and a second end connected to the second end of the third control switch.

[0028] In order to solve the above technical problems, the utility model also provides a power supply device for a mass spectrometer, including a first power supply, a second power supply and a power switching circuit as described above, wherein the output end of the first power supply is connected to the first input end of the power switching circuit, the output end of the second power supply is connected to the second input end of the power switching circuit, and the output end of the power switching circuit is connected to the mass spectrometer.

[0029] The utility model provides a power switching circuit, including a first control switch, a second control switch and a delay module, wherein the first power supply is directly output from the output end of the power switching circuit, and the second control switch is connected in series between the second power supply and the output end of the power switching circuit, and when the first power supply is powered on, the first control switch is turned on, and the second control switch is controlled to be turned off, thereby cutting off the power supply circuit of the second power supply, and preventing the two power supplies from supplying power at the same time; when the first power supply is disconnected, the first control switch is turned off, and at the same time, since the delay module is turned on when the second power supply is powered on, the second control switch is turned on, and the second power supply is controlled to start supplying power. By introducing the second power supply as a backup power supply, and introducing the delay module at the same time, the simultaneous power supply situation that may be generated when the two power supplies are turned on at the same time is avoided, and the intersection of the two power supplies is avoided at the moment of turning on, sufficient time is left to control the second control switch, and the secondary impact caused by the power switching at the moment of turning on is avoided to damage the mass spectrometer, and the problem of the failure of the identification due to the damage of the power module in the process of microbial identification of the mass spectrometer is solved, and the secondary identification is avoided, and the risk of microbial sample failure caused by maintenance time is avoided, and reliable and continuous work is ensured during the identification process of the mass spectrometer.

[0030] The utility model also provides a power supply device for a mass spectrometer, which has the same beneficial effects as the above power switching circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the structure of a power switching circuit provided by the utility model;

[0033] Figure 2 An electrical principle block diagram of a power switching circuit provided by the utility model;

[0034] Figure 3 This is a structural schematic diagram of another power switching circuit provided by the utility model. DETAILED DESCRIPTION

[0035] The core of the utility model is to provide a power switching circuit and a power supply device for a mass spectrometer, which introduces a second power supply as a backup power supply and introduces a delay module to avoid simultaneous power supply when the two power supplies are turned on at the same time, avoid crossover when the two power supplies are turned on, leave sufficient time to control the second control switch, and avoid damage to the mass spectrometer due to the secondary impact caused by the power switching at the moment of turning on, solve the problem of failure of the mass spectrometer in the process of microbial identification due to damage to the power module, avoid secondary identification, and avoid the risk of microbial sample failure caused by maintenance time, thereby ensuring reliable and continuous operation of the mass spectrometer during the identification process.

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a power switching circuit provided by the utility model; please refer to Figure 2 , Figure 2 This is an electrical principle block diagram of a power switching circuit provided by the utility model; please refer to Figure 3 , Figure 3 This is a schematic diagram of another power switching circuit provided by the utility model. VIN1 represents the first power supply, VIN2 represents the second power supply, VOUT represents the power supply finally output by the power switching circuit, and GND represents grounding. To solve the above technical problems, the utility model provides a power switching circuit, including:

[0038] The first control switch Q1 has an input end connected to the first power supply and serves as an output end of the power switching circuit, and is used to be turned on when the first power supply is powered on, and turned off when the first power supply is not powered on;

[0039] The delay module 1 has an input end connected to the second power supply, and an output end connected to the first output end of the first control switch Q1 and the control end of the second control switch Q2, respectively, and is used to turn on after a preset delay time when the second power supply is powered on, and to turn off when the second power supply is not powered on;

[0040] The second control switch Q2 has a first end connected to the second power supply and connected to the second output end of the first control switch Q1, and a second end connected to the output end of the power switching circuit, and is used to be turned on when the delay module 1 is turned on and the first control switch Q1 is turned off, and turned off when the first control switch Q1 is turned on.

[0041] Specifically, the first power supply is directly connected to the output end of the power switching circuit. When the first power supply is powered on, the first power supply can directly output the power supply voltage for power supply. The second power supply is connected to the output end of the power switching circuit through the second control switch Q2 connected in series. The power supply voltage will be normally output when the second control switch Q2 is turned on. When the second control switch Q2 is turned off, the power supply voltage cannot be normally output. Therefore, when the first power supply is powered on normally, the first power supply connected to the control of the first control switch Q1 will control the first control switch Q1 to remain in the on state. At the same time, the first output end of the first control switch Q1 is connected to the control end of the second control switch Q2, and the second output end of the first control switch Q1 is connected to the first end of the second control switch Q2. The turned-on first control switch Q1 will control the second control switch Q2 to remain turned off, so that the entire power switching circuit outputs the first power supply, avoiding the situation where the two power supplies are supplying power at the same time.

[0042] Furthermore, the control end of the second control switch Q2 is also connected to the output end of the delay module 1, and the delay module 1 uses the second power supply to control the conduction of the second control switch Q2. When the second power supply is powered on, the delay module 1 will be turned on after a period of delay. At this time, if the first power supply is powered on, the turned-on first control switch Q1 will control the second control switch Q2 to be turned off, that is, when the first power supply is powered on normally, the second power supply does not need to supply power; but if the first power supply fails and cannot be powered on normally, the first control switch Q1 is turned off and cannot control the second control switch Q2. The second control switch Q2 will remain turned on under the action of the turned-on delay module 1 and use the second power supply to supply power. In this process, the delay module 1 avoids the conduction of the second control switch Q2 when the first power supply and the second power supply are powered on at the same time by delaying with a preset time length. When the first power supply and the second power supply are powered on at the same time, the delay module 1 will be later than the conduction of the first control switch Q1, and the second control switch Q2 will remain turned off directly under the action of the first control switch Q1.

[0043] It should be noted that the second control switch Q2 is turned off when the first control switch Q1 is turned on, and cannot be turned on when the delay module 1 is turned off. It will only be turned on when the first control is turned off and the delay module 1 is turned on, that is, only when the first power supply cannot be powered on normally and the second power supply is powered on normally can the second power supply be supplied through the turned-on second control switch Q2. The preset delay time of the delay module 1 is not particularly limited in this application, and can be selected and set according to factors such as the response speed of the first control switch Q1 used in actual application.

[0044] It can be understood that the present application does not make any special limitations on the specific types and implementation methods of the first power supply and the second power supply. The first power supply serves as the main power supply and the second power supply serves as the backup power supply. In order to ensure timely power supply of the second power supply when the first power supply fails and cannot supply power normally, in actual application, the first power supply and the second power supply are controlled to be powered on at the same time. At this time, due to the delay process set by the delay module 1, repeated power supply of the second power supply when the first power supply is powered on can be avoided, and the value of the preset time length will not be set too large, so as to avoid the situation where the first power supply fails earlier than the turn-on time of the delay module 1. When the first power supply and the second power supply are powered on at the same time, the first control switch Q1 will be turned on earlier than the delay module 1, thereby controlling the second control switch Q2 to remain off. After a period of time, the delay module 1 will be turned on. At this time, the second control switch Q2 is still turned off under the action of the turned-on first control switch Q1, until the first control switch Q1 is turned off due to the first power supply not being powered on, the turned-on delay module 1 will control the second control switch Q2 to be turned on, and the delay module 1 always remains turned on under the action of the normally powered-on second power supply. When the first control switch Q1 is turned off, the delay module 1 and the second control switch Q2 can respond in time, and the second control switch Q2 is quickly turned on to control the second power supply to start supplying power.

[0045] It is not difficult to understand that the present application does not make any special restrictions on the specific types and implementation methods of the first control switch Q1, the second control switch Q2 and the delay module 1. The first control switch Q1 and the second control switch Q2 can be implemented by switching devices of the type of power electronic switch tubes, the on or off process of the delay module 1 can be achieved by setting switching devices, and the delay process can be achieved by using delay devices or delay circuits.

[0046] The power switching circuit provided in the present application can quickly switch the power supply to continue supplying power when the power supply is damaged, and can be used to provide reliable power supply for various types of equipment. In particular, it can avoid experimental interruptions caused by power supply damage to the mass spectrometer, ensure a complete microbial identification, avoid secondary identification of samples, save identification time, and also avoid the risk of microbial sample failure due to long power supply maintenance time.

[0047] Specifically, Figure 2 As shown, the power switching circuit has two power supply inputs VIN1 and VIN2, and the two power supplies are input to the power switching circuit. At the same time, an anti-backflow output circuit can be further set at the output end of the power switching circuit to ensure the reliability and safety of the power supply process. When the main power supply VIN1 and the backup power supply VIN2 are turned on at the same time, they will be input into the power switching circuit for selection and output. The power switching circuit delays the opening of the backup power supply VIN2 output, and the power switching circuit selects the output according to the specific situation of whether the main power supply VIN1 exists. When VIN1 exists, the VIN2 output is immediately cut off, and the mass spectrometer is powered by the anti-backflow output circuit to prevent VIN1 from backflowing into VIN2. When VIN1 fails, it is immediately switched to VIN2 output, and the mass spectrometer is powered by the anti-backflow output to prevent VIN2 from backflowing into VIN1. This ensures that when the main power supply VIN1 fails, the backup power supply VIN2 is enabled, thereby ensuring that the mass spectrometer can continue to operate when the main power supply VIN1 fails.

[0048] As a specific embodiment, the specific circuit structure of the power switching circuit provided in the present application is as follows: Figure 3 As shown, it includes power input, power switching circuit body, and additional modules such as anti-backflow output circuit set on the output side. The power input serves as the power supply unit of the mass spectrometer, including a first power supply VIN1 as the main power supply and a second power supply VIN2 as the backup power supply. The first power supply VIN1 is usually a DC power supply converted and output by an AC-DC power supply module from a 220V mains electricity supply, and the second power supply VIN2 can be directly input using a backup DC power supply. The backup DC power supply and the AC-DC power supply module are turned on and off at the same time, and VIN2 and VIN1 are input at the same time to ensure that the backup power supply can be turned on in time.

[0049] like Figure 3As shown, taking the first control switch Q1 using an optocoupler, the second control switch Q2 using an NPN-type triode, and the second control switch Q2 using a P-type MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor) as an example. The power switching circuit serves as a selection module for the second power supply VIN2 and the first power supply VIN1 of the mass spectrometer, the first resistor R1 has its pin 1 connected to VIN1, and its pin 2 connected to the first control switch Q1, the second resistor R2 has its pin 1 connected to the first control switch Q1, and its pin 2 connected to GND, the first resistor R1 and the second resistor R2 play the role of current limiting and voltage dividing, and the first control switch Q1 has its pin 4 connected to VIN2. On the other hand, the 1st pin of the fourth resistor R4 in the delay module 1 is connected to VIN2, the 2nd pin is connected to the 1st pin of the fifth resistor R5, the 2nd pin of the fourth resistor R4 is connected to GND to form a voltage divider circuit, and the third control switch Q3 is provided with a start voltage. The electrolytic capacitor C is connected in parallel with the fifth resistor R5, and forms a delay circuit with the fourth resistor R4 to realize the delay process of the delay module 1. At the same time, the capacitor C is connected in parallel between the base and the emitter of the third control switch Q3, and the emitter of the third control switch Q3 is connected to GND. The delay circuit can delay the opening of the third control switch Q3 to realize the delayed conduction process. The 1st pin of the sixth resistor R6 is connected to VIN2, the 2nd pin is connected to the 1st pin of the seventh resistor R7, the 1st pin of the third resistor R3 and the 3rd pin of the first control switch Q1, the 2nd pin of the seventh resistor R7 is connected to the collector 3rd pin of the third control switch Q3, the sixth resistor R6, the seventh resistor R7 and the third control switch Q3 form a voltage divider circuit, and the voltage divider circuit provides a start voltage for the second control switch Q2. Pin 2 of the third resistor R3 is connected to pin 2 of the gate of the P-channel MOS tube, pin 3 of the source of the second control switch Q2 is connected to VIN2, pin 1 of the drain is connected to pin 1 of the anode of the high-power diode D2 as the second unidirectional conduction module, and the power supply VIN1 is connected to pin 1 of the anode of the high-power diode D1 as the first unidirectional conduction module.When the power sources VIN2 and VIN1 exist at the same time, the third control switch Q3 is turned on with delay under the action of VIN2 and the delay circuit, and the second control switch Q2 is also turned on with delay. At the same time, the first control switch Q1 is turned on immediately when VIN1 exists. At this time, the third control switch Q3 has not been turned on due to the delay. The conduction of the first control switch Q1 will pull the voltage of the gate of the second control switch Q2 to the same voltage as the source of the second control switch Q2, resulting in the second control switch Q2 not being turned on, and only VIN1 is used for power supply; and when VIN1 fails, the third control switch Q3 has already achieved delayed turning on when VIN2 is powered on. The first control switch Q1 is turned off under the action of VIN1, and the gate 2 pin of the second control switch Q2 is pulled to the output voltage of the delay module 1. The output voltage will be less than VIN2 due to the line impedance and the resistance impedance. The second control switch Q2 is turned on immediately, and the power supply is switched to VIN2 at this time.

[0050] On the other hand, the entire circuit is also provided with a first unidirectional conduction module D1 and a second unidirectional conduction module D2 for preventing backflow output as a protection power supply unit for the mass spectrometer. The drain pin 1 of the P-channel MOS tube Q2 is connected to the anode pin 1 of the high-power diode D2, and the cathode pin 2 of D2 is connected to the VOUT output. The power supply VIN1 is connected to the anode pin 1 of the high-power diode D1, and the cathode pin 2 of D1 is connected to the VOUT output. When VIN1 exists, VIN2 output is blocked, the high-power diode D1 is turned on for power supply, and D2 can prevent VIN1 from backflowing into VIN2. When VIN1 fails, VIN2 is turned on for power output through the high-power diode D1, and D1 can prevent VIN2 from backflowing into VIN1.

[0051] It is not difficult to understand that the power switching circuit proposed in this application solves the problem of identification failure caused by damage to the power module during the microbial identification of the mass spectrometer, avoids the situation of secondary identification, and avoids delaying the identification time due to the maintenance of the power module, and avoids the risk of failure of the microbial sample caused by the maintenance time. It is very suitable for laboratories, hospitals and other places, and the method is simple and practical. The components used in the circuit include capacitors, resistors, triodes, MOS tubes, etc. The implementation principle of the components is simple and clear, and the production cost is low. When the power supply is damaged, the power supply can be quickly switched to continue to supply power, avoiding the interruption of the experiment caused by the damage of the power supply to the mass spectrometer, and ensuring a complete microbial identification. The two power supplies can be turned on and off at the same time. When the backup power supply VIN2 is turned on, the delay module 1 is introduced, leaving the main power supply VIN1 with sufficient time to control the output of VIN2, avoiding the intersection of the two power supply circuits at the moment of opening, and avoiding the secondary impact caused by the power switching at the moment of opening to damage the mass spectrometer. The high-power diodes D1 and D2 for preventing backflow output ensure that the power supply circuits in which they are located can supply power normally, and also prevent the current from backflowing into the power supply circuit when the opposite power supply circuit is turned on.

[0052] The utility model provides a power switching circuit, comprising a first control switch Q1, a second control switch Q2 and a delay module 1, wherein a first power supply is directly output from an output end of the power switching circuit, and the second control switch Q2 is connected in series between the second power supply and the output end of the power switching circuit. When the first power supply is powered on, the first control switch Q1 is turned on, and the second control switch Q2 is controlled to be turned off, thereby cutting off a power supply circuit of the second power supply, and preventing the two power supplies from supplying power at the same time; when the first power supply is disconnected, the first control switch Q1 is turned off, and at the same time, since the delay module 1 is turned on when the second power supply is powered on, the second control switch Q2 is turned on, and the second power supply is controlled to start supplying power. By introducing a second power supply as a backup power supply and introducing a delay module 1, the simultaneous power supply situation that may occur when the two power supplies are turned on at the same time can be avoided, and the crossover of the two power supplies can be avoided at the moment of turning on, leaving sufficient time to control the second control switch Q2, so as to avoid the secondary impact caused by the power switching at the moment of turning on to damage the mass spectrometer, thereby solving the problem of the failure of the mass spectrometer in the process of microbial identification due to damage to the power module, avoiding the situation of secondary identification, and avoiding the risk of microbial sample failure caused by maintenance time, thereby ensuring the reliable and continuous operation of the mass spectrometer during the identification process.

[0053] Based on the above embodiments:

[0054] As an optional embodiment, the power switching circuit further includes:

[0055] A first resistor R1, a first end of which is connected to a first power supply, and a second end of which is connected to a first input end of a first control switch Q1;

[0056] The second resistor R2 has a first end connected to the second input end of the first control switch Q1 and a second end grounded.

[0057] It is not difficult to understand that, considering that the first power supply is directly connected to the input end of the first control switch Q1, which may cause faults such as damage to the first control switch Q1, especially when the power supply voltage of the first power supply is too large, the first input end of the first control switch Q1 is directly connected to the power supply voltage, which will cause the first input end of the first control switch Q1 to be subjected to a large voltage shock, causing damage to the first control switch Q1, etc., a first resistor R1 can be set to limit the power supply voltage of the first power supply to a certain current before connecting it to the first input end of the first control switch Q1. At the same time, in order to facilitate the turned-on first control switch Q1 to effectively control the turn-off of the second control switch Q2, the second output end of the first control switch Q1 is connected to the first end of the second control switch Q2, and the second resistor R2 grounds the second input end of the first control switch Q1, which can provide a stable bias voltage for the first control switch Q1 and ensure the accurate operation of the first control switch Q1. The present application does not specifically limit the specific types and implementations of the first resistor R1 and the second resistor R2. The specific resistance values ​​and voltage division ratios of the first resistor R1 and the second resistor R2 can be determined according to the selection of the first control switch Q1 and the specific turn-on threshold voltage.

[0058] Specifically, by adding the first resistor R1 and the second resistor R2, the current limiting of the first input terminal of the first power supply output to the first control switch Q1 and the grounding of the second input terminal can be effectively achieved, thereby protecting the safety of the first control switch Q1 and the entire circuit. At the same time, the second input terminal of the first control switch Q1 can be effectively grounded through the second resistor R2 to avoid malfunction of the first control switch Q1, improve the accuracy of the conduction process of the first control switch Q1, and ensure the accuracy and reliability of the entire power switching circuit. The entire circuit structure is simple and easy to implement. The components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0059] As an optional embodiment, the power switching circuit further includes:

[0060] The third resistor R3 has a first end connected to the first output end of the first control switch Q1 and the output end of the delay module 1 respectively, and a second end connected to the control end of the second control switch Q2.

[0061] It is not difficult to understand that a third resistor R3 connected to the control end of the second control switch Q2 can be further added. The third resistor R3 is connected in series in the circuit to avoid direct connection between the voltage output by the delay module 1 or the control end of the second control switch Q2 when the first control switch Q1 is turned on, and plays a role in current limiting and voltage division, avoiding voltage shock to the control end of the second control switch Q2, and protecting the second control switch Q2. The specific type and implementation of the third resistor R3 are not particularly limited in this application.

[0062] Specifically, by adding the third resistor R3, the current limiting and voltage dividing function can be further achieved to protect the second control switch Q2 and improve the safety and reliability of the entire power switching circuit. The entire circuit structure is simple and easy to implement. The components used are low-cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0063] As an optional embodiment, the power switching circuit further includes:

[0064] The first unidirectional conducting module D1 has a positive electrode connected to the first end of the first resistor R1 and the first power supply, and a negative electrode serving as an output end of the power switching circuit.

[0065] It is not difficult to understand that, considering that the first power supply and the second power supply are both connected to the output end of the power switching circuit in order to realize power supply, in order to prevent the power supply voltage output from the output end of the power switching circuit from flowing back into the power switching circuit during the power supply process of the first power supply, and also to prevent the power supply voltage during the power supply process of the second power supply from flowing back into the first power supply, a first unidirectional conduction module D1 can be added to the power supply circuit of the first power supply. The first unidirectional conduction module D1 is usually arranged between the connection node between the first resistor R1 and the first power supply and the output end of the power switching circuit, which can effectively prevent the power supply voltage from flowing back into the power switching circuit through the first resistor R1, stipulate the power supply direction of the first power supply, and ensure the correct implementation of the power supply process. The specific type and implementation method of the first unidirectional conduction module D1 are not particularly limited in this application, and can be implemented using unidirectional conduction devices such as diodes.

[0066] Specifically, by further adding a first unidirectional conduction module D1, the current backflow and other situations that may exist in the power supply process can be effectively avoided, the power supply direction of the first power supply can be specified, the correct implementation of the power supply process can be ensured, the circuit can be protected, and the safety and reliability of the entire power switching circuit can be ensured. The entire circuit structure is simple and easy to implement. The components used are low-cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0067] As an optional embodiment, the power switching circuit further includes:

[0068] The second unidirectional conducting module D2 has a positive electrode connected to the second end of the second control switch Q2 and a negative electrode serving as an output end of the power switching circuit.

[0069] It is not difficult to understand that, considering that the first power supply and the second power supply are both connected to the output end of the power switching circuit in order to realize power supply, in order to prevent the power supply voltage output from the output end of the power switching circuit from flowing back into the power switching circuit during the power supply process of the second power supply, and also to prevent the power supply voltage during the power supply process of the first power supply from flowing back into the second power supply, a second unidirectional conduction module D2 can be added to the power supply circuit of the second power supply. The second unidirectional conduction module D2 is usually arranged between the second control switch Q2 and the output end of the power switching circuit, which can effectively prevent the power supply voltage from flowing back into the power switching circuit through the turned-on second control switch Q2, and stipulate the power supply direction of the second power supply to ensure the correct implementation of the power supply process. The specific type and implementation method of the second unidirectional conduction module D2 are not particularly limited in this application, and can be implemented using unidirectional conduction devices such as diodes.

[0070] Specifically, by further adding a second unidirectional conduction module D2, the current backflow and other situations that may exist in the power supply process can be effectively avoided, the power supply direction of the second power supply can be specified, the correct implementation of the power supply process can be ensured, the circuit can be protected, and the safety and reliability of the entire power switching circuit can be ensured. The entire circuit structure is simple and easy to implement. The components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0071] As an optional embodiment, the delay module 1 includes:

[0072] A fourth resistor R4, a first end of which is respectively connected to the first end of the second control switch Q2 and the second power supply;

[0073] Capacitor C, a first end is grounded;

[0074] The third control switch Q3, the control end is respectively connected to the second end of the fourth resistor R4 and the second end of the capacitor C, the first end is grounded and connected to the first end of the capacitor C, and the second end serves as the output end of the delay module 1, and is used to be turned on after a preset delay time when the second power supply is powered on, and turned off when the second power supply is not powered on.

[0075] It can be understood that the delay process in the delay module 1 can be implemented by an RC circuit, so the fourth resistor R4 and the capacitor C can be set in the delay module 1 to form a delay circuit, and at the same time, the second end of the fourth resistor R4 and the second end of the capacitor C are connected to the control end of the third control switch Q3, so as to realize the delay control process of the third control switch Q3 when the second power supply is powered on. After the second power supply is powered on, the third control switch Q3 will be turned on after a delay of a preset time under the action of the delay circuit, thereby realizing the delay conduction process of the delay module 1. The specific types and implementation methods of the fourth resistor R4, the capacitor C and the third control switch Q3 are not particularly limited in this application, and the preset time can be adjusted by adjusting the resistance value of the fourth resistor R4 and the capacitance value of the capacitor C. The third control switch Q3 can be implemented by a power electronic switch device such as a triode.

[0076] Specifically, a delay circuit composed of a fourth resistor R4 and a capacitor C is provided in the delay module 1 to realize the delayed conduction of the third control switch Q3, thereby effectively realizing the delayed conduction process of the delay module 1 after the second power supply is powered on. The entire circuit structure is simple and easy to implement. The components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0077] As an optional embodiment, the delay module 1 further includes:

[0078] The fifth resistor R5 has a first end connected to the second end of the fourth resistor R4 and the second end of the capacitor C respectively, and a second end connected to the ground and to the first end of the capacitor C and the first end of the third control switch Q3 respectively.

[0079] It is not difficult to understand that a fifth resistor R5 connected in parallel at both ends of the capacitor C may be further added. The fifth resistor R5 and the fourth resistor R4 form a voltage divider circuit, which divides the second power supply and outputs it to the control end of the third control switch Q3 to provide a stable control voltage for the third control switch Q3. At the same time, the fifth resistor R5 and the capacitor C are connected in parallel between the control end and the first end of the third control switch Q3, which can provide a stable and reliable bias voltage for the third control switch Q3 to avoid misconduction of the third control switch Q3. The specific type and implementation method of the fifth resistor R5 are not particularly limited in this application.

[0080] Specifically, a fifth capacitor C may be further provided on the basis of the fourth resistor R4 and the capacitor C. The fifth capacitor C is also connected in parallel between the control end and the first end of the third control switch Q3 to provide a stable and reliable bias point for the third control switch Q3, thereby ensuring the accurate operation of the third control switch Q3. The entire circuit structure is simple and easy to implement. The components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0081] As an optional embodiment, the delay module 1 further includes:

[0082] The sixth resistor R6 has a first end connected to the first end of the second control switch Q2, the first end of the fourth resistor R4 and the second power supply, and a second end connected to the second end of the third control switch Q3, the first output end of the first control switch Q1 and the control end of the second control switch Q2.

[0083] It is not difficult to understand that a sixth resistor R6 connected in parallel between the control end and the first end of the second control switch Q2 can be further added to provide a stable and reliable bias voltage for the second control switch Q2 to avoid misconduction of the second control switch Q2. At the same time, the sixth resistor R6 can further form a voltage divider circuit with the third control switch Q3 to avoid damage to the device caused by excessive control voltage output to the second control switch Q2, thereby further protecting the circuit. The specific type and implementation method of the sixth resistor R6 are not particularly limited in this application.

[0084] Specifically, the additionally provided sixth resistor R6 can not only provide a stable and reliable bias voltage for the second control switch Q2 to ensure the accuracy and reliability of the operation process of the second control switch Q2, but can also further form a voltage divider circuit with the third control switch Q3 to further protect the circuit; the entire circuit structure is simple and easy to implement, and the components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0085] As an optional embodiment, the delay module 1 further includes:

[0086] The seventh resistor R7 has a first end connected to the second end of the sixth resistor R6, the first output end of the first control switch Q1 and the control end of the second control switch Q2, and a second end connected to the second end of the third control switch Q3.

[0087] It is not difficult to understand that, considering that the voltage at both ends of the third control switch Q3 is relatively small when it is turned on, it is difficult to effectively implement the voltage division process. Therefore, a seventh resistor R7 can be further provided between the first end of the third control switch Q3 and the control end of the second control switch Q2 to cooperate with the sixth resistor R6 to form a voltage division resistor. The second power supply finally outputs the delay module 1 through the voltage division circuit formed by the sixth resistor R6 and the seventh resistor R7. By flexibly adjusting the resistance values ​​of the sixth resistor R6 and the seventh resistor R7, the voltage finally output by the delay module 1 to the control end of the second control switch Q2 can be adjusted. The specific resistance value needs to be set according to the specific type of the second control switch Q2 and its turn-on threshold voltage. The specific type and implementation method of the seventh resistor R7 are not particularly limited in this application.

[0088] Specifically, the seventh resistor R7 is added to further improve the voltage-dividing circuit in the delay module 1, thereby improving the controllability of the voltage after voltage division finally output by the delay module 1. The resistor device is used to realize the effective voltage division of the control voltage output to the second control switch Q2, thereby ensuring the safety and reliability of the second control switch Q2 and the entire power switching circuit. The entire circuit structure is simple and easy to implement, and the components used are low in cost and small in size, which is conducive to the simple implementation of the entire power switching circuit.

[0089] In order to solve the above technical problems, the utility model also provides a power supply device for a mass spectrometer, including a first power supply, a second power supply and a power switching circuit as described above, the output end of the first power supply is connected to the first input end of the power switching circuit, the output end of the second power supply is connected to the second input end of the power switching circuit, and the output end of the power switching circuit is connected to the mass spectrometer.

[0090] It is not difficult to understand that the power switching circuit provided in the present application can be applied to a mass spectrometer to provide reliable power supply for the mass spectrometer. The specific types and implementation methods of the first power supply and the second power supply can be set according to the specific situation of the mass spectrometer. The mass spectrometer can realize a continuous identification process under the action of the power switching circuit provided in the present application.

[0091] For an introduction to a power supply device for a mass spectrometer provided by the present invention, please refer to the above-mentioned embodiment of the power switching circuit, and the present invention will not be described in detail here.

[0092] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0093] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0094] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power switching circuit, characterized in that: include: A first control switch, whose input end is connected to the first power supply and serves as the output end of the power switching circuit, and is used to be turned on when the first power supply is powered on, and turned off when the first power supply is not powered on; A delay module, the input end of which is connected to the second power supply, and the output end of which is respectively connected to the first output end of the first control switch and the control end of the second control switch, and is used to turn on after a preset delay when the second power supply is powered on, and to turn off when the second power supply is not powered on; The second control switch has a first end connected to the second power supply and connected to the second output end of the first control switch, and a second end connected to the output end of the power switching circuit, and is used to be turned on when the delay module is turned on and the first control switch is turned off, and turned off when the first control switch is turned on.

2. The power switching circuit according to claim 1, wherein: The power switching circuit further includes: a first resistor, a first end of which is connected to a first power supply, and a second end of which is connected to a first input end of the first control switch; The second resistor has a first end connected to the second input end of the first control switch and a second end grounded.

3. The power switching circuit according to claim 2, wherein: The power switching circuit further includes: A third resistor has a first end connected to the first output end of the first control switch and the output end of the delay module respectively, and a second end connected to the control end of the second control switch.

4. The power switching circuit according to claim 3, characterized in that: The power switching circuit further includes: The first unidirectional conducting module has a positive electrode connected to the first end of the first resistor and the first power supply respectively, and a negative electrode serving as an output end of the power switching circuit.

5. The power switching circuit according to claim 4, characterized in that: The power switching circuit further includes: The second unidirectional conducting module has a positive electrode connected to the second end of the second control switch and a negative electrode serving as an output end of the power switching circuit.

6. The power switching circuit according to any one of claims 1 to 5, characterized in that: The delay module comprises: a fourth resistor, a first end of which is respectively connected to the first end of the second control switch and the second power supply; A capacitor, a first end of which is grounded; A third control switch, wherein the control end is respectively connected to the second end of the fourth resistor and the second end of the capacitor, the first end is grounded and connected to the first end of the capacitor, and the second end serves as the output end of the delay module, and is used to be turned on after a preset delay time when the second power supply is powered on, and to be turned off when the second power supply is not powered on.

7. The power switching circuit according to claim 6, wherein: The delay module also includes: A fifth resistor has a first end connected to the second end of the fourth resistor and the second end of the capacitor respectively, and a second end connected to the ground and to the first end of the capacitor and the first end of the third control switch respectively.

8. The power switching circuit according to claim 7, wherein: The delay module also includes: A sixth resistor, wherein a first end is respectively connected to the first end of the second control switch, the first end of the fourth resistor and the second power supply, and a second end is respectively connected to the second end of the third control switch, the first output end of the first control switch and the control end of the second control switch.

9. The power switching circuit according to claim 8, characterized in that: The delay module also includes: A seventh resistor has a first end connected to the second end of the sixth resistor, the first output end of the first control switch and the control end of the second control switch respectively, and a second end connected to the second end of the third control switch.

10. A power supply device for a mass spectrometer, characterized in that: It comprises a first power supply, a second power supply and a power switching circuit as described in any one of claims 1 to 9, wherein the output end of the first power supply is connected to the first input end of the power switching circuit, the output end of the second power supply is connected to the second input end of the power switching circuit, and the output end of the power switching circuit is connected to the mass spectrometer.

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