High-voltage power supply discharge protection circuit and spectrograph

Abstract

The utility model discloses a high-voltage power supply discharge protection circuit and a spectrometer. The circuit comprises a discharge protection control module, a driving switching module, a switching module, an excitation high-voltage power supply wiring module, an excitation high-voltage power supply module, a discharge module and a high-voltage power supply module, the discharge protection control module is electrically connected with the driving switching module; the driving switching module is electrically connected with the power supply end of the switching module; the switching module is electrically connected with the excitation high-voltage power supply wiring module and the discharging module; the excitation high-voltage power supply wiring module is electrically connected with the excitation high-voltage power supply module; the excitation high-voltage power supply wiring module is electrically connected with the high-voltage power supply module; according to the scheme, the discharge protection of the high-voltage power supply is realized.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of high-voltage breakdown discharge, and in particular to a high-voltage power supply discharge protection circuit and a spectrometer. Background Art

[0002] In many devices that use the principle of high-voltage breakdown air discharge, there will be a long period of discharge after the high-voltage discharge ends. This is because high-voltage breakdown air discharge generally has a high frequency, high voltage (above 10KV), and large energy. There will be many high-capacitance capacitors in the circuit. When these factors are combined, when the discharge needs to end, the residual energy in the circuit cannot be released, which will cause discharge. Utility Model Content

[0003] The utility model provides a high-voltage power supply discharge protection circuit and a spectrometer, which realize the protection of the high-voltage power supply discharge.

[0004] To achieve the above objectives, in a first aspect, an embodiment of the utility model provides a high-voltage power supply discharge protection circuit, the circuit comprising: a discharge protection control module, a drive switching module, a switching module, an excitation high-voltage power supply wiring module, an excitation high-voltage power supply module, a discharge module and a high-voltage power supply module;

[0005] The discharge protection control module is electrically connected to the drive switching module, and is used to output a power on / off control instruction to the drive switching module;

[0006] The drive switching module is electrically connected to the power supply end of the switching module; and is used to output a switching control instruction according to the power on / off control instruction;

[0007] The switching module is electrically connected to the excitation high-voltage power wiring module and the discharge module; the excitation high-voltage power wiring module is electrically connected to the excitation high-voltage power module; the excitation high-voltage power wiring module is electrically connected to the high-voltage power module;

[0008] The switching module is used to control the excitation high-voltage power connection module to be in a first state under the switching control instruction so that the excitation high-voltage power connection module powers on the high-voltage power module through the excitation high-voltage power connection module; and to disconnect the high-voltage power module and discharge to the discharge module through the excitation high-voltage power connection module and the switching module;

[0009] It is also used to control the excitation high-voltage power supply wiring module to be in the second state under the switching control instruction so that the excitation high-voltage power supply module cuts off the power supply to the high-voltage power supply module through the excitation high-voltage power supply wiring module, and makes the high-voltage power supply module discharge to the discharge module through the excitation high-voltage power supply wiring module and the switching module.

[0010] Optionally, the circuit further includes: an optocoupler isolation module; the optocoupler isolation module is connected in series between the discharge protection control module and the drive switching module.

[0011] Optionally, the circuit further includes: an optical fiber optical coupler serial port module;

[0012] The discharge protection control module is electrically connected to the fiber optic coupler serial port module; the fiber optic coupler serial port module is used to receive and send the power on / off control instruction to the discharge protection control module; or communicate the power on / off control instruction output by the discharge protection control module to the outside.

[0013] Optionally, the switching module includes a relay unit or a contactor unit.

[0014] Optionally, the optical coupling isolation module includes a photoelectric transmitting tube, a photoelectric receiving tube, a first current limiting resistor and a second current limiting resistor;

[0015] The first end of the first current limiting resistor is electrically connected to the control end of the discharge protection control module; the second end of the first current limiting resistor is electrically connected to the input end of the photoelectric transmitting tube; the output end of the photoelectric transmitting tube is coupled and connected to the control end of the photoelectric receiving tube; the first end of the photoelectric receiving end is electrically connected to the first end of the second current limiting resistor; the second end of the second current limiting resistor is electrically connected to the voltage source; and the second end of the photoelectric receiving end is electrically connected to the drive switching module.

[0016] Optionally, the driving switching module includes: a first transistor, a voltage stabilizing diode and a first pull-down resistor;

[0017] The control end of the first transistor is electrically connected to the second end of the photoelectric receiving tube and the first end of the first pull-down resistor; the first end of the first transistor is electrically connected to the first end of the voltage-stabilizing diode; the second end of the first transistor is electrically connected to the second end of the first pull-down resistor and the second end of the voltage-stabilizing diode and is grounded.

[0018] Optionally, the relay unit includes a coil, a first contact, a switching contact and a second contact;

[0019] The first end of the first transistor is electrically connected to the first end of the coil; the second end of the coil is electrically connected to a voltage source;

[0020] The first contact is electrically connected to the discharge module; the switching contact is electrically connected to the first end of the excitation high-voltage power supply wiring module; the second contact is electrically connected to the second end of the excitation high-voltage power supply wiring module; the second end of the excitation high-voltage power supply wiring module is electrically connected to the first end of the excitation high-voltage power supply module; the sixth end of the excitation high-voltage power supply wiring module is electrically connected to the second end of the excitation high-voltage power supply module; the seventh end of the excitation high-voltage power supply wiring module is electrically connected to the first end of the high-voltage power supply module; the first end of the excitation high-voltage power supply wiring module is electrically connected to the second end of the high-voltage power supply module.

[0021] Optionally, the discharge module includes a discharge resistor; a first end of the discharge resistor is electrically connected to the first contact; and a second end of the discharge resistor is grounded.

[0022] Optionally, the resistance of the discharge resistor satisfies: 0.5Ω≤R≤5Ω.

[0023] In a second aspect, an embodiment of the utility model further provides a spectrometer, which includes the high-voltage power supply discharge protection circuit described in the above embodiment.

[0024] In the embodiment of the utility model, the discharge protection control module outputs a power on / off control instruction to the drive switching module; the drive switching module outputs a second switching control instruction to the switching module according to the power on / off control instruction; the switching module controls the exciting high-voltage power wiring module to be in the second state under the second switching control instruction so that the exciting high-voltage power wiring module is cut off to power on the high-voltage power module, and the high-voltage power module is discharged through the discharge module, so that when the exciting high-voltage power wiring module is in the second state, the high-voltage power module can be powered off, and after the high-voltage power module is powered off, the residual energy of the high-voltage power module is discharged through the discharge module, thereby avoiding the problem of high-voltage power discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a high-voltage power supply discharge protection circuit provided by an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of another high-voltage power supply discharge protection circuit provided by an embodiment of the utility model;

[0027] Figure 3 It is a specific structural schematic diagram of a high-voltage power supply discharge protection circuit provided by an embodiment of the utility model;

[0028] Figure 4 It is a specific structural schematic diagram of another high-voltage power supply discharge protection circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] Figure 1 Schematic diagram of a high voltage power supply discharge protection circuit provided by an embodiment of the utility model. Figure 1 As shown, the circuit includes: a discharge protection control module 10, a drive switching module 20, a switching module 30, an excitation high-voltage power supply wiring module 40, an excitation high-voltage power supply module 50, a discharge module 60 and a high-voltage power supply module 70;

[0031] The discharge protection control module 10 is electrically connected to the drive switching module 20 and is used to output a power on / off control instruction to the drive switching module 20;

[0032] The drive switching module 20 is electrically connected to the switching module 30, and is used to output a first switching control instruction and a second switching control instruction according to the power on / off control instruction;

[0033] The switching module 30 is electrically connected to the excitation high voltage power supply wiring module 40 and the discharge module 60; the excitation high voltage power supply wiring module 40 is electrically connected to the excitation high voltage power supply module 50; the excitation high voltage power supply wiring module 40 is electrically connected to the high voltage power supply module 70;

[0034] The switching module 30 is used to control the exciting high-voltage power supply wiring module 40 to be in a first state under a first switching control instruction so that the exciting high-voltage power supply module 50 powers on the high-voltage power supply module 70 by exciting the high-voltage power supply wiring module 40, and the high-voltage power supply module 70 is disconnected from discharging to the discharge module 60 by exciting the high-voltage power supply wiring module 40 and the switching module 30; and is also used to control the exciting high-voltage power supply wiring module 40 to be in a second state under a second switching control instruction so that the exciting high-voltage power supply module 50 is disconnected from powering on the high-voltage power supply module 70 by exciting the high-voltage power supply wiring module 40, and the high-voltage power supply module 70 is discharged to the discharge module 60 by exciting the high-voltage power supply module 40 and the switching module 30.

[0035] Among them, the discharge protection control module 10 can be a discharge protection chip, which can output power on and off control instructions to the drive switching module 20, that is, output power on control instructions and power off control instructions to the drive switching module 20; the drive switching module 20 can convert the power on control instructions and the power off control instructions into first switching control instructions and second switching control instructions respectively; the switching module 30 controls the excitation high-voltage power supply wiring module 40 to be in different states under different switching control instructions; the excitation high-voltage power supply wiring module 40 is a wiring bank adapted to the excitation high-voltage power supply module 50; it can be a variety of types of wiring banks; this embodiment does not make specific limitations on this.

[0036] In this embodiment, the discharge protection control module 10 outputs a power-on control instruction to the drive switching module 20; the drive switching module 20 outputs a first switching control instruction according to the power-on control instruction; the switching module 30 controls the high-voltage power wiring module 40 to be in a first state under the first switching control instruction, so that the high-voltage power module 50 is powered on by the high-voltage power wiring module 40; after the high-voltage power module 70 is powered on for a preset time, the discharge protection control module 10 outputs a power-off control instruction to the drive switching module 20; the drive switching module 20 outputs a second switching control instruction according to the power-off ... Block 30 controls the exciting high-voltage power supply wiring module 40 to be in the second state under the second switching control instruction, so that the exciting high-voltage power supply module 50 cuts off the power to the high-voltage power supply module 70 through the exciting high-voltage power supply wiring module 40, and discharges the high-voltage power supply module 70 through the discharge module 60; this solves the problem that after the high-voltage power supply module 70 is powered off, the current or voltage output by the high-voltage power supply module 70 does not immediately return to zero, but gradually disappears in a slowly decaying manner, which will cause the tailing problem, and realizes that the residual energy of the high-voltage power supply module 70 is discharged through the discharge module 60 when the high-voltage power supply module 70 is powered off, thereby realizing the protection of the high-voltage power supply discharge.

[0037] It should be noted that when the high-voltage power supply wiring module 40 is excited and is in the first state, the high-voltage power supply module 50 is excited to power on the high-voltage power supply module 70 by stimulating the high-voltage power supply wiring module 40; at the same time, the high-voltage power supply module 70 is disconnected and discharges to the discharge module 60 by stimulating the high-voltage power supply wiring module 40 and the switching module 30; this avoids the energy of the high-voltage power supply module 70 when it is powered on being connected to the discharge module 60, thereby damaging the discharge module 60.

[0038] Optionally, based on the above embodiment, further optimization is performed: Figure 2 Schematic diagram of another high voltage power supply discharge protection circuit provided by the embodiment of the utility model; Figure 2As shown, the circuit further includes: an optocoupler isolation module 80; the optocoupler isolation module 80 is connected in series between the discharge protection control module 10 and the drive switching module 20. The optocoupler isolation module 80 is connected in series between the discharge protection control module 10 and the drive switching module 20, which can effectively isolate the electrical signals between the discharge protection control module 10 and the drive switching module 20, and prevent the signal interference and noise of the discharge protection control module 10 from being transmitted to the drive switching module 20, so as to improve the driving reliability and stability of the drive switching module 20.

[0039] Optional, continue to refer to Figure 2 The circuit also includes: a fiber optic coupler serial port module 90; the discharge protection control module 10 is electrically connected to the fiber optic coupler serial port module 90; the fiber optic coupler serial port module 90 is used to receive and send a power on / off control instruction to the discharge protection control module 10, or to communicate the power on / off control instruction output by the discharge protection control module 10 to the outside; wherein, the fiber optic coupler serial port module 90 includes a fiber optic coupler serial port receiving unit and a fiber optic coupler serial port sending unit, the fiber optic coupler serial port receiving unit may be HFBR-2523, which may receive the power on / off control instruction from the host computer; the fiber optic coupler serial port sending unit may be HFBR-1523, which may communicate the power on / off control instruction output by the discharge protection control module 10 to the outside, thereby realizing information sharing.

[0040] Optional, continue to refer to Figure 2 The switching module 30 includes a relay unit or a contactor unit. The switching module 30 includes a relay unit, which controls the high-voltage power wiring module 40 to be in a first state under a first switching control instruction; the relay unit controls the high-voltage power wiring module 40 to be in a second state under a second switching control instruction; and the advantages of using the relay unit as a switching module are: the relay unit has high sensitivity, low control power, and good electromagnetic compatibility; and can achieve fast conversion at the same time, and the switching speed can be from a few milliseconds to a few microseconds.

[0041] In some embodiments, the switching module 30 includes a contactor unit, which can control the high-voltage power supply wiring module 40 to be in different states under different switching control instructions; and the advantage of using the contactor unit as a switching module is that the contactor unit has a large carrying capacity, a large current allowed to pass through, and a high withstand voltage. In addition, some of them have built-in arc extinguishing devices, thus ensuring the reliability of switching.

[0042] The following is a specific circuit diagram for explanation; Figure 3 Schematic diagram of a high voltage power supply discharge protection circuit provided by an embodiment of the utility model. Figure 3As shown, the optical coupling isolation module 80 includes a photoelectric transmitting tube IC-1, a photoelectric receiving tube IC-2, a first current limiting resistor R1 and a second current limiting resistor R2;

[0043] The first end of the first current limiting resistor R1 is electrically connected to the control end of the discharge protection control module 10; the second end of the first current limiting resistor R1 is electrically connected to the input end of the photoelectric transmitting tube IC-1; the output end of the photoelectric transmitting tube IC-1 is coupled and connected to the control end of the photoelectric receiving tube IC-2; the first end of the photoelectric receiving end IC-2 is electrically connected to the first end of the second current limiting resistor R2; the second end of the second current limiting resistor R2 is electrically connected to the voltage source VCC; the second end of the photoelectric receiving end IC-2 is electrically connected to the drive switching module 20.

[0044] Optional, such as Figure 3 As shown, the drive switching module 20 includes: a first transistor Q1, a voltage-stabilizing diode D1 and a first pull-down resistor R0; the control end of the first transistor Q1 is electrically connected to the second end of the photoelectric receiving tube IC-2 and the first end of the first pull-down resistor R0; the first end of the first transistor Q1 is electrically connected to the first end of the voltage-stabilizing diode D1; the second end of the first transistor Q1 is electrically connected to the second end of the first pull-down resistor R0 and the second end of the voltage-stabilizing diode D1 and is grounded.

[0045] Optional, such as Figure 3 As shown, the switching module 30 is a relay unit 31, and the relay unit 31 includes a coil T, a first contact 11, a switching contact 22 and a second contact 33; the first end of the first transistor Q1 is electrically connected to the first end of the coil T; the second end of the coil T is electrically connected to the voltage source VCC;

[0046] The first contact 11 is electrically connected to the discharge module 60; the switching contact 22 is electrically connected to the first end 1 of the excitation high-voltage power supply wiring module 50; the second contact 33 is electrically connected to the second end 2 of the excitation high-voltage power supply wiring module 40; the second end 2 of the excitation high-voltage power supply wiring module 40 is electrically connected to the first end of the excitation high-voltage power supply module 50; the sixth end 6 of the excitation high-voltage power supply wiring module 40 is electrically connected to the second end of the excitation high-voltage power supply module 50; the seventh end 7 of the excitation high-voltage power supply wiring module 40 is electrically connected to the negative end of the high-voltage power supply module 70; the first end 1 of the excitation high-voltage power supply wiring module 40 is electrically connected to the positive end of the high-voltage power supply module 70; the third end 3 of the excitation high-voltage power supply wiring module 40 is electrically connected to the second end 2 of the excitation high-voltage power supply wiring module 40; the fourth end 4 of the excitation high-voltage power supply wiring module 40 and the fifth end 5 of the excitation high-voltage power supply wiring module 40 are suspended.

[0047] Optional, such as Figure 3 As shown, the discharge module 60 includes a discharge resistor R; a first end of the discharge resistor R is electrically connected to the first contact 11; and a second end of the discharge resistor R is grounded GND.

[0048] Specifically, the discharge protection control module 10 outputs a power-on control instruction. If the power-on control instruction is at a high level, the photoelectric transmitting tube IC-1 emits light, and the corresponding photoelectric receiving tube IC-2 converts the optical signal into a high-level electrical signal and outputs it to the first transistor Q1. The first transistor Q1 is turned on, and the coil T is energized; when the coil T is energized, the switching contact 22 is switched to connect with the second contact 33, so that the first end of the high-voltage power supply module 60 is excited through the second end 2 of the high-voltage power supply wiring module 40, the second contact 33, the switching contact 22 and the first end of the high-voltage power supply wiring module 40. The end is connected to the positive end of the high-voltage power module 70; the second end of the high-voltage power module 50 is connected to the negative end of the high-voltage power module 70 through the sixth end 6 of the high-voltage power wiring module 40 and the seventh end 7 of the high-voltage power wiring module 40; in this way, the high-voltage power module 50 can be excited to power on the high-voltage power module 70; at this time, the positive end of the high-voltage power module 70 is not connected to the discharge resistor R through the first end of the high-voltage power wiring module 70, so that the high-voltage power module 70 is disconnected from discharging to the discharge module 60 through the high-voltage power wiring module 40 and the switching module 40;

[0049] After the high-voltage power supply module 70 is powered on for a preset time, the discharge protection control module 10 outputs a power-off control instruction. If the power-off control instruction is at a low level, the photoelectric transmitting tube IC-1 does not emit light, and the corresponding photoelectric receiving tube IC-2 cannot convert the optical signal into a high-level electrical signal and output it to the first transistor Q1. The first transistor Q1 is not turned on, and the coil T is not energized. When the coil T is not energized, the switching contact 22 is switched to connect with the first contact 11, so that after the first end of the high-voltage power supply module 60 is excited and the second end 2 and the second contact 33 of the high-voltage power supply wiring module 70 are excited, the second contact 33 cannot be connected to the switching contact 22. If the switching contact 22 is connected, it is impossible to stimulate the high-voltage power supply module 60 to power on the high-voltage power supply module 70; at the same time, since the switching contact 22 is switched to be connected to the first contact 11, the positive end of the high-voltage power supply module 70 is connected to the discharge resistor R1 by stimulating the first end 1 of the high-voltage power supply wiring module 40, the switching contact 22 and the first contact 11, so that the high-voltage power supply module 70 is discharged through the discharge module 60, which solves the problem that the current or voltage output by the high-voltage power supply module 70 does not immediately return to zero after the high-voltage power supply module 70 is powered off, and gradually disappears in a slowly decaying manner, which will cause a tailing problem.

[0050] It can be understood that the first current limiting resistor R1 and the second current limiting resistor R2 can play a role in current limiting; the first pull-down resistor R0 can ensure that when the first transistor Q1 is turned on, its control terminal is maintained at a low level; and the voltage stabilizing diode D1 can play a role in voltage stabilization.

[0051] Optional, such as Figure 3 As shown, the resistance value of the discharge resistor R satisfies: 0.5Ω≤R≤5Ω. Among them, the discharge resistor R can be a golden resistor to ensure a higher conductivity; when the resistance value of the discharge resistor R satisfies: 0.5Ω≤R≤5Ω, it can meet the rapid discharge requirements when the actual high-voltage power module is disconnected and the heat dissipation requirements of the discharge resistor R itself.

[0052] Optional, Figure 4 FIG. 1 is a schematic diagram of a specific structure of another high-voltage power supply discharge protection circuit provided by an embodiment of the present invention. Figure 4 As shown, the specific structures of the optocoupler isolation module 80, the drive switching module 20, the discharge protection control module 10, and the discharge module 60 are the same as those in the above-mentioned embodiments; the switching module 30 can also be a contactor unit 32, which includes a coil T, a first contact 11, a switching contact 22, and a second contact 33; and an arc extinguishing unit; the arc extinguishing unit includes a third resistor R3 and a first capacitor C1; the first end of the first transistor Q1 is electrically connected to the first end of the coil T; the connection relationship between the coil T, the first contact 11, the switching contact 22, and the second contact 33 in the contactor unit 32 is the same as the connection relationship between the coil T, the first contact 11, the switching contact 22, and the second contact 33 in the relay 31, and will not be repeated here; the first end of the third resistor is electrically connected to the switching contact 33; the second end of the third resistor R3 is electrically connected to the first end of the first capacitor C1; the second end of the first capacitor C1 is electrically connected to the second end 2 of the excitation high-voltage power supply wiring module 40. Among them, the switching function of the contactor unit 32 is the same as the switching function of the relay unit 31, which is not explained here; in addition, the contactor unit 32 includes a third resistor R3 and a first capacitor C1, which can avoid the spark phenomenon caused by the switching contact 22 when switching from the connection with the first contact 11 to the second contact 33, thereby ensuring the reliability of the switching.

[0053] Based on the same utility model concept, the utility model embodiment also provides a spectrometer, which includes the high-voltage power supply discharge protection circuit of the above embodiment. Since the spectrometer in this embodiment includes the high-voltage power supply discharge protection circuit described in the above embodiment, it also has the beneficial effects described in the above embodiment, which will not be repeated here; in addition, the high-voltage power supply discharge protection circuit is set in the spectrometer, which can avoid the influence of residual energy on other devices in the spectrometer when the high-voltage power supply is disconnected, thereby improving the reliability of the spectrometer detection.

[0054] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A high voltage power supply discharge protection circuit, characterized in that: include: Discharge protection control module, drive switching module, switching module, excitation high-voltage power supply wiring module, excitation high-voltage power supply module, discharge module and high-voltage power supply module; The discharge protection control module is electrically connected to the drive switching module, and is used to output a power on / off control instruction to the drive switching module; The drive switching module is electrically connected to the power supply end of the switching module; and is used to output a switching control instruction according to the power on / off control instruction; The switching module is electrically connected to the excitation high-voltage power wiring module and the discharge module; the excitation high-voltage power wiring module is electrically connected to the excitation high-voltage power module; the excitation high-voltage power wiring module is electrically connected to the high-voltage power module; The switching module is used to control the excitation high-voltage power connection module to be in a first state under the switching control instruction so that the excitation high-voltage power connection module powers on the high-voltage power module through the excitation high-voltage power connection module; and to disconnect the high-voltage power module and discharge to the discharge module through the excitation high-voltage power connection module and the switching module; It is also used to control the excitation high-voltage power supply wiring module to be in the second state under the switching control instruction so that the excitation high-voltage power supply module cuts off the power supply to the high-voltage power supply module through the excitation high-voltage power supply wiring module, and makes the high-voltage power supply module discharge to the discharge module through the excitation high-voltage power supply wiring module and the switching module.

2. The high voltage power supply discharge protection circuit according to claim 1, characterized in that: Also includes: Optocoupler isolation module; The optical coupling isolation module is connected in series between the discharge protection control module and the drive switching module.

3. The high voltage power supply discharge protection circuit according to claim 2, characterized in that: Also includes: Fiber optic coupler serial port module; The discharge protection control module is electrically connected to the optical fiber optical coupler serial port module; The optical fiber optical coupler serial port module is used to receive and send the power on / off control instruction to the discharge protection control module; or to communicate the power on / off control instruction output by the discharge protection control module to the outside.

4. The high voltage power supply discharge protection circuit according to claim 2, characterized in that: The switching module includes a relay unit or a contactor unit.

5. The high voltage power supply discharge protection circuit according to claim 4, characterized in that: The optical coupling isolation module includes a photoelectric transmitting tube, a photoelectric receiving tube, a first current limiting resistor and a second current limiting resistor; The first end of the first current limiting resistor is electrically connected to the control end of the discharge protection control module; the second end of the first current limiting resistor is electrically connected to the input end of the photoelectric transmitting tube; the output end of the photoelectric transmitting tube is coupled and connected to the control end of the photoelectric receiving tube; the first end of the photoelectric receiving tube is electrically connected to the first end of the second current limiting resistor; the second end of the second current limiting resistor is electrically connected to the voltage source; and the second end of the photoelectric receiving tube is electrically connected to the drive switching module.

6. The high voltage power supply discharge protection circuit according to claim 5, characterized in that: The drive switching module includes: a first transistor, a voltage stabilizing diode and a first pull-down resistor; The control end of the first transistor is electrically connected to the second end of the photoelectric receiving tube and the first end of the first pull-down resistor; the first end of the first transistor is electrically connected to the first end of the voltage-stabilizing diode; the second end of the first transistor is electrically connected to the second end of the first pull-down resistor and the second end of the voltage-stabilizing diode and is grounded.

7. The high voltage power supply discharge protection circuit according to claim 6, characterized in that: The relay unit comprises a coil, a first contact, a switching contact and a second contact; The first end of the first transistor is electrically connected to the first end of the coil; the second end of the coil is electrically connected to a voltage source; The first contact is electrically connected to the discharge module; the switching contact is electrically connected to the first end of the excitation high-voltage power supply wiring module; the second contact is electrically connected to the second end of the excitation high-voltage power supply wiring module; the second end of the excitation high-voltage power supply wiring module is electrically connected to the first end of the excitation high-voltage power supply module; the sixth end of the excitation high-voltage power supply wiring module is electrically connected to the second end of the excitation high-voltage power supply module; the seventh end of the excitation high-voltage power supply wiring module is electrically connected to the first end of the high-voltage power supply module; the first end of the excitation high-voltage power supply wiring module is electrically connected to the second end of the high-voltage power supply module.

8. The high voltage power supply discharge protection circuit according to claim 7, characterized in that: The discharge module comprises a discharge resistor; a first end of the discharge resistor is electrically connected to the first contact; and a second end of the discharge resistor is grounded.

9. The high voltage power supply discharge protection circuit according to claim 8, characterized in that: The resistance value of the discharge resistor satisfies: 0.5Ω≤R≤5Ω.

10. A spectrometer, characterized in that: A high voltage power supply discharge protection circuit comprising any one of claims 1 to 9.

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