Soft X-ray circuit structure for static electricity elimination

Abstract

The utility model relates to a soft X-ray circuit structure for static electricity elimination. Comprising a main control circuit, a filament power supply isolation power supply circuit, a voltage doubling rectifying circuit, a power driving circuit, a voltage sampling circuit, a current sampling circuit and a soft X-ray tube used for generating soft X-rays, the filament voltage control circuit is used for controlling the filament voltage of the soft X-ray tube; the high-voltage voltage control circuit is used for controlling the voltage generated by ions of the soft X-ray tube; the voltage sampling circuit and the current sampling circuit are respectively connected with the voltage doubling rectifying circuit, and the main control circuit is respectively connected with the voltage sampling circuit and the current sampling circuit so as to send the sampled voltage and current to the main control circuit to judge whether the soft X-ray tube works normally or not; whether the soft X-ray tube works normally or not is judged by detecting the power of the soft X-ray tube in real time, and then the working state of the soft X-ray tube is controlled in time.

Description

Technical Field

[0001] The utility model relates to the technical field of soft X-rays, in particular to a soft X-ray circuit structure for static elimination. Background Art

[0002] In manufacturing processes such as liquid crystal (LCD), plasma (PDP), and semiconductor manufacturing, due to the adsorption of fine dust caused by static electricity and the lattice damage caused by electrostatic discharge, the yield of products is reduced, which has become the main reason affecting production volume and causing an increase in manufacturing costs.

[0003] In the above-mentioned manufacturing industries, as anti-static countermeasures, currently mainly ion grids or ion blowers that generate ions according to corona discharge are used. However, the ions generated by these devices need to use fans to convect air. In this process, according to the jet phenomenon of high-voltage discharge, a large number (tens of thousands / cubic foot) of metal microparticles are generated and attached to the ends of the discharge electrodes. Due to the forced convection of the fan, they fall off and attach around the liquid crystal (LCD), plasma (PDP), and semiconductor lattices, resulting in defects.

[0004] Moreover, the ozone gas generated during high-voltage discharge reaches about 4 - 10 ppm. This not only promotes the attachment of dust but also causes the balance of the generated positive and negative ions to change at any time, thus there is an inconvenience that the ion balance needs to be continuously adjusted. Therefore, an anti-static technology that does not generate dust and does not require air convection is needed.

[0005] Later, a device for static elimination using a soft X-ray tube appeared. However, it is difficult to detect in time whether the soft X-ray tube is working. Moreover, the power of existing soft X-ray tubes is often fixed, making it difficult to adapt to different usage requirements.

[0006] Therefore, in this utility model patent application, the applicant has carefully studied a soft X-ray circuit structure for static elimination to solve the above problems. Summary of the Utility Model

[0007] Aiming at the deficiencies of the above-mentioned prior art, the main purpose of the utility model is to provide a soft X-ray circuit structure for static elimination, which can detect the power of the soft X-ray tube in real time to determine whether the soft X-ray tube is working properly and then timely control the working state of the soft X-ray tube.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A soft X-ray circuit structure for eliminating static electricity, comprising a main control circuit, a filament power supply isolation power supply circuit, a voltage multiplier rectification circuit, a power drive circuit, a voltage sampling circuit, a current sampling circuit, a soft X-ray tube for generating soft X-rays, a filament voltage control circuit for controlling the filament voltage of the soft X-ray tube, and a high-voltage control circuit for controlling the voltage generated by ions of the soft X-ray tube;

[0010] The main control circuit is respectively connected to the enable terminals of both the filament voltage control circuit and the high-voltage control circuit, and the output terminal of the filament voltage control circuit is connected to the soft X-ray tube through the filament power supply isolation power supply circuit;

[0011] The output terminal of the high-voltage control circuit is connected to the power drive circuit to provide a high-voltage signal to the power drive circuit, the main control circuit is connected to the input terminal of the power drive circuit to send a drive signal to the power drive circuit, and the output terminal of the power drive circuit is connected to the soft X-ray tube through the voltage multiplier rectification circuit to drive the soft X-ray tube to work according to the drive signal;

[0012] The voltage sampling circuit and the current sampling circuit are respectively connected to the voltage multiplier rectification circuit, and the main control circuit is respectively connected to the voltage sampling circuit and the current sampling circuit to send the sampled voltage and current to the main control circuit, and then judge whether the soft X-ray tube is working properly.

[0013] As a preferred solution, the main control circuit includes a chip U1, and the chip U1 has main control pins 1 to 16;

[0014] Main control pin 39 is connected to the high-voltage control circuit, main control pin 41 is connected to the filament voltage control circuit, and main control pins 40 and 42 are respectively connected to the power drive circuit.

[0015] As a preferred solution, the main control circuit is respectively connected to the voltage sampling circuit and the current sampling circuit through a sampling and amplification circuit.

[0016] As a preferred solution, the sampling and amplification circuit includes a chip U3, a resistor R29, a resistor R31, a resistor R32, a resistor R35, a resistor R36, a resistor R33, a resistor R30, a capacitor C36, a capacitor C37, a capacitor C42, a capacitor C38, a capacitor C39, and a capacitor C40;

[0017] One end of resistor R29 is respectively connected to pin 1 of chip U3 and the main control circuit, resistor R29 is grounded through capacitor C36, resistors R31 and R32 are in series, the non - series node of resistor R31 is connected to the voltage sampling circuit, the non - series node of resistor R31 is also grounded through capacitor C37, the non - series node of resistor R32 is connected to pin 1 of chip U3, the series node of resistors R31 and R32 is connected to pin 2 of chip U3, and pins 3 and 4 of chip U3 are both grounded;

[0018] Pin 8 of chip U3 is used to connect the VCC5 voltage, one end of resistor R30 is respectively connected to pin 7 of chip U3 and the main control circuit, resistor R30 is grounded through capacitor C42, resistors R33 and R34 are in series, the non - series node of resistor R33 is connected to pin 7 of chip U3, the non - series node of resistor R34 is grounded, the series node of resistors R33 and R34 is connected to pin 6 of chip U3, and pin 6 of chip U3 is connected to pin 7 of chip U3 through capacitor C38;

[0019] Resistors R35 and R36 are in series, the non - series node of resistor R36 is connected to the current sampling circuit, the non - series node of resistor R35 is connected to pin 5 of chip U3, the series node of resistors R35 and R36 is grounded through capacitor C39, and pin 8 of chip U3 is grounded through capacitor C40.

[0020] As a preferred solution, a voltage regulation circuit is further included, and the main control circuit is respectively connected to the filament voltage control circuit and the high - voltage control circuit through the voltage regulation circuit to regulate the filament voltage and the high - voltage.

[0021] As a preferred solution, the voltage regulation circuit includes chip U4, capacitors C30, C43, C33, C56, C57, C31, C45, C44, C34, C32, resistors R48, R19, R15, R20, R16, R23, R18, R24, R22, R26 and R25;

[0022] Pin 1 of chip U4 is connected to the high-voltage voltage control circuit through resistor R15. The high-voltage voltage control circuit is also grounded through capacitor C43. Resistors R19 and R20 are in series. The non-series node of resistor R19 is connected to the main control circuit. The non-series node of resistor R20 is connected to pin 2 of chip U4. The series node of resistors R19 and R20 is grounded through capacitor C30. Pin 2 of chip U4 is grounded through capacitor C33. Pin 3 of chip U4 is connected to the high-voltage voltage control circuit through resistor R16. Pin 3 of chip U4 is also grounded through resistor R23. Pin 1 of chip U4 is connected to pin 3 of chip U4 through capacitor C57. Capacitor C56 and resistor R48 are in series. Capacitor C57 is connected in parallel to the non-series node of capacitor C56 and resistor R48. Pin 4 of chip U4 is grounded.

[0023] Pin 8 of chip U4 is used to connect to the VCC5 voltage. Pin 8 of chip U4 is grounded through capacitor C32. Pin 7 of chip U4 is connected to the filament voltage control circuit through resistor R18. The filament voltage control circuit is grounded through capacitor C45. Capacitor C44 is connected in parallel across both ends of capacitor C45. Resistors R24 and R25 are in series. The non-series node of resistor R25 is connected to the main control circuit. The non-series node of resistor R24 is connected to pin 6 of chip U4. The series node of resistors R24 and R25 is grounded through capacitor C31. Pin 6 of chip U4 is grounded through capacitor C34. Pin 5 of chip U4 is connected to the filament voltage control circuit through resistor R22. Pin 5 of chip U4 is grounded through resistor R26.

[0024] As a preferred solution, the voltage multiplier rectifier circuit includes a transformer T1, a resistor R45, a plurality of voltage multiplier units connected in series, and the positive output terminal and the negative output terminal connecting the soft X-ray tube.

[0025] Pin 4 of transformer T1 is grounded. Pin 3 of transformer T1 is connected to the output terminal of the power drive circuit through capacitor C15. Pin 2 of transformer T1 is grounded and pin 2 of transformer T1 is connected to one end of resistor R45. Pin 1 of transformer T1 and the other end of resistor R45 are respectively connected to the first input terminal and the second input terminal of the voltage multiplier unit at the head end. The other end of resistor R45 is also connected to the current sampling circuit.

[0026] The first output terminal and the second output terminal of the voltage multiplier unit at the tail end are respectively connected to the positive output terminal and the negative output terminal. The negative output terminal is connected to the voltage sampling circuit.

[0027] As a preferred solution, the voltage multiplier unit includes a first capacitor, a second capacitor, a first diode, and a second diode.

[0028] The positive electrode of the first diode and the negative electrode of the second diode are commonly connected to one end of the first capacitor, and the negative electrode of the first diode is connected to the positive electrode of the second diode through the second capacitor;

[0029] The other end of the first capacitor and the negative electrode of the first diode are respectively the first input terminal and the second input terminal of the voltage multiplier unit, and the positive and negative electrodes of the second diode are respectively the second output terminal and the first output terminal of the voltage multiplier unit.

[0030] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it mainly uses a voltage sampling circuit and a current sampling circuit to detect the power of the soft X-ray tube in real time to determine whether the soft X-ray tube is working properly and then timely control the working state of the soft X-ray tube;

[0031] Secondly, through the voltage regulation circuit, the corresponding output voltage can be reasonably adjusted according to the actual use requirements, and then it can adapt to soft X-ray tubes with different voltage requirements. Moreover, the filament voltage control circuit and the high-voltage control circuit share the same chip, reducing the circuit cost;

[0032] Furthermore, by using an amplification circuit, the collected voltage and current can be amplified and then sent to the main control chip. Moreover, the voltage sampling circuit and the current sampling circuit share the same chip, reducing the circuit cost;

[0033] In addition, the overall circuit structure is designed ingeniously and reasonably, ensuring the stability and reliability of the DC watt-hour meter during use.

[0034] To more clearly illustrate the structural features and functions of the utility model, the following will be described in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a general control principle block diagram of an embodiment of the utility model.

[0036] Figure 2 is a schematic diagram of the voltage multiplier rectifier circuit of an embodiment of the utility model (showing the current sampling circuit and the voltage regulation circuit);

[0037] Figure 3 is a schematic diagram of the filament power supply isolation and power supply circuit of an embodiment of the utility model;

[0038] Figure 4 is a schematic diagram of the voltage regulation circuit of an embodiment of the utility model;

[0039] Figure 5 is a schematic diagram of the power drive circuit of an embodiment of the utility model;

[0040] Figure 6It is the schematic diagram of the high-voltage voltage control circuit of the embodiment of the present utility model;

[0041] Figure 7 It is the schematic diagram of the filament voltage control circuit of the embodiment of the present utility model;

[0042] Figure 8 It is the schematic diagram of the sampling and amplifying circuit of the embodiment of the present utility model;

[0043] Figure 9 It is the schematic diagram of the main control circuit of the embodiment of the present utility model;

[0044] Figure 10 It is the schematic diagram of the circuit of the RS485 communication module of the embodiment of the present utility model.

[0045] Explanation of the drawing numbers

[0046] 10. Main control circuit 20. High-voltage voltage control circuit

[0047] 30. Filament voltage control circuit 40. Power drive circuit

[0048] 50. Voltage doubling rectifier circuit 60. Filament power supply isolation and power supply circuit

[0049] 70. Voltage sampling circuit 80. Current sampling circuit

[0050] 90. Sampling and amplifying circuit 100. Voltage regulating circuit

[0051] 110. Soft X-ray tube 121. RS485 communication module 122. Liquid crystal display screen. Specific implementation manners

[0052] The present utility model will be further described below in conjunction with the drawings and specific implementation manners.

[0053] As Figures 1 to 10 shown, a soft X-ray circuit structure for eliminating static electricity includes a main control circuit 10, a filament power supply isolation and power supply circuit 60, a voltage doubling rectifier circuit 50, a power drive circuit 40, a voltage sampling circuit 70, a current sampling circuit 80, a soft X-ray tube 110 for generating soft X-rays, a filament voltage control circuit 30 for controlling the filament voltage of the soft X-ray tube 110, and a high-voltage voltage control circuit 20 for controlling the voltage generated by the ions of the soft X-ray tube 110;

[0054] The main control circuit 10 is respectively connected to the enable ends of both the filament voltage control circuit 30 and the high-voltage voltage control circuit 20, and the output end of the filament voltage control circuit 30 is connected to the soft X-ray tube 110 through the filament power supply isolation and power supply circuit 60.

[0055] In this embodiment, the main control circuit 10 includes a chip U1, and the chip U1 has main control pins 1 to 16;

[0056] The main control pin 39 is connected to the high-voltage control circuit, the main control pin 41 is connected to the filament voltage control circuit, and the main control pins 40 and 42 are respectively connected to the power drive circuit.

[0057] The output end of the high-voltage control circuit 20 is connected to the power drive circuit 40 to provide a high-voltage signal to the power drive circuit 40. The main control circuit 10 is connected to the input end of the power drive circuit 40 to send a drive signal to the power drive circuit 40. The output end of the power drive circuit 40 is connected to the soft X-ray tube 110 through a voltage multiplier rectifier circuit 50 to drive the soft X-ray tube 110 to work according to the drive signal.

[0058] In this embodiment, the main control circuit is further connected with an RS485 communication module 121 for long-distance communication. The RS485 communication module 121 is communicatively connected to the host computer, so as to receive data from the host computer and then perform customized control on the soft X-ray tube 110, such as releasing X-rays at a specified time.

[0059] Preferably, the RS485 communication module 121 is composed of a communication chip U33 and its peripheral circuits. The 485A port and 485B port of the communication chip U33 communicate with the host computer at a long distance through an RS485 communication line to realize long-distance communication between the communication chip U33 and the host computer. Or it is connected to the field device through the RS485 communication line to realize signal transmission between the field device and the communication chip U33.

[0060] The main control circuit 10 is further connected with a liquid crystal display screen 122, which can be used to display the working duration of the soft X-ray tube 110.

[0061] In this embodiment, the power drive circuit 40 is composed of a chip U2 and its peripheral circuits. In this embodiment, the main control pins 40 and 42 are respectively connected to the pin 2 and pin 4 of the chip U2. The filament voltage control circuit 30 is composed of a chip U6 and its peripheral circuits. In this embodiment, the main control pin 41 is connected to the pin 3 of the chip U6. The high-voltage control circuit 20 is composed of a chip U5 and its peripheral circuits. In this embodiment, the main control pin 39 is connected to the pin 3 of the chip U5.

[0062] In this embodiment, the voltage multiplier rectifier circuit 50 includes a transformer T1, a resistor R45, a plurality of voltage multiplier units connected in series, and a positive output end and a negative output end connected to the soft X-ray tube 110;

[0063] Pin 4 of transformer T1 is grounded. Pin 3 of transformer T1 is connected to the output terminal of power drive circuit 40 (i.e., pin 6 of chip U2) through capacitor C15. Pin 2 of transformer T1 is grounded and pin 2 of transformer T1 is connected to one end of resistor R45. One end of pin 1 of transformer T1 and the other end of resistor R45 are respectively connected to the first input terminal and the second input terminal of the voltage multiplier unit at the head end. The other end of resistor R45 is also connected to current sampling circuit 80;

[0064] The first output terminal and the second output terminal of the voltage multiplier unit at the tail end are respectively connected to the positive output terminal and the negative output terminal. The negative output terminal is connected to voltage sampling circuit 70.

[0065] The voltage multiplier unit includes a first capacitor, a second capacitor, a first diode and a second diode;

[0066] The positive electrode of the first diode and the negative electrode of the second diode are commonly connected to one end of the first capacitor. The negative electrode of the first diode is connected to the positive electrode of the second diode through the second capacitor;

[0067] The other end of the first capacitor and the negative electrode of the first diode are respectively the first input terminal and the second input terminal of the voltage multiplier unit. The positive and negative electrodes of the second diode are respectively the second output terminal and the first output terminal of the voltage multiplier unit.

[0068] The voltage sampling circuit 70 and the current sampling circuit 80 are respectively connected to the voltage multiplier rectifier circuit 50, and the main control circuit 10 is respectively connected to the voltage sampling circuit 70 and the current sampling circuit 80 to send the sampled voltage and current to the main control circuit 10, and then judge whether the soft X-ray tube 110 works normally. In this embodiment, the main control circuit 10 is respectively connected to the voltage sampling circuit 70 and the current sampling circuit 80 through the sampling and amplifying circuit 90.

[0069] The sampling and amplifying circuit 90 includes chip U3, resistor R29, resistor R31, resistor R32, resistor R35, resistor R36, resistor R33, resistor R30, capacitor C36, capacitor C37, capacitor C42, capacitor C38, capacitor C39 and capacitor C40;

[0070] Both ends of resistor R29 are respectively connected to pin 1 of chip U3 and the main control circuit 10. In this implementation, both ends of resistor R30 are respectively connected to pin 7 of chip U3 and the main control pin 26. Resistor R29 is grounded through capacitor C36. Resistors R31 and R32 are in series. The non-series node of resistor R31 is connected to the voltage sampling circuit 70. The non-series node of resistor R31 is also grounded through capacitor C37. The non-series node of resistor R32 is connected to pin 1 of chip U3. The series node of resistors R31 and R32 is connected to pin 2 of chip U3. Pins 3 and 4 of chip U3 are both grounded;

[0071] Pin 8 of chip U3 is used to connect to the VCC5 voltage. The two ends of resistor R30 are respectively connected to pin 7 of chip U3 and the main control circuit 10. In this embodiment, the two ends of resistor R30 are respectively connected to pin 7 of chip U3 and main control pin 27. Resistor R30 is grounded through capacitor C42. Resistors R33 and R34 are in series. The non-series node of resistor R33 is connected to pin 7 of chip U3. The non-series node of resistor R34 is grounded. The series node of resistors R33 and R34 is connected to pin 6 of chip U3. Pin 6 of chip U3 is connected to pin 7 of chip U3 through capacitor C38;

[0072] Resistors R35 and R36 are in series. The non-series node of resistor R36 is connected to the current sampling circuit 80. The non-series node of resistor R35 is connected to pin 5 of chip U3. The series node of resistors R35 and R36 is grounded through capacitor C39. Pin 8 of chip U3 is grounded through capacitor C40.

[0073] The voltage sampling circuit 70 includes a potentiometer R3, resistors R1 and R2; Resistors R1 and R2 are in series. The non-series node of resistor R1 is connected to the negative output terminal of the voltage doubling rectifier circuit 50. The series node of resistors R1 and R2 is connected to the sampling and amplifying circuit 90. The non-series node of resistor R2 is grounded through the potentiometer R3.

[0074] In this embodiment, there is also a voltage regulating circuit 100. The main control circuit 10 is respectively connected to the filament voltage control circuit 30 and the high-voltage control circuit 20 through the voltage regulating circuit 100 to regulate the filament voltage and the high-voltage.

[0075] Preferably, the voltage regulating circuit 100 includes chip U4, capacitors C30, C43, C33, C56, C57, C31, C45, C44, C34, C32, resistors R48, R19, R15, R20, R16, R23, R18, R24, R22, R26 and R25;

[0076] Pin 1 of chip U4 is connected to the high-voltage control circuit 20 through resistor R15. The high-voltage control circuit 20 is also grounded through capacitor C43. Resistors R19 and R20 are in series. The non-series node of resistor R19 is connected to the main control circuit 10. In this embodiment, the non-series node of resistor R19 is connected to main control pin 22. The non-series node of resistor R20 is connected to pin 2 of chip U4. The series node of resistors R19 and R20 is grounded through capacitor C30.

[0077] Pin 2 of chip U4 is grounded through capacitor C33. Pin 3 of chip U4 is connected to the high-voltage voltage control circuit 20 through resistor R16. Pin 3 of chip U4 is also grounded through resistor R23. Pin 1 of chip U4 is connected to pin 3 of chip U4 through capacitor C57. Capacitor C56 and resistor R48 are in series, and capacitor C57 is connected in parallel to the non-series node of capacitor C56 and resistor R48. Pin 4 of chip U4 is grounded.

[0078] Pin 8 of chip U4 is used to connect to the VCC5 voltage. Pin 8 of chip U4 is grounded through capacitor C32. Pin 7 of chip U4 is connected to the filament voltage control circuit 30 through resistor R18. The filament voltage control circuit 30 is grounded through capacitor C45. Capacitor C44 is connected in parallel across both ends of capacitor C45. Resistor R24 and resistor R25 are in series. The non-series node of resistor R25 is connected to the main control circuit 10. In this embodiment, the non-series node of resistor R25 is connected to the main control pin 21. The non-series node of resistor R24 is connected to pin 6 of chip U4. The series node of resistor R24 and resistor R25 is grounded through capacitor C31.

[0079] Pin 6 of chip U4 is grounded through capacitor C34. Pin 5 of chip U4 is connected to the filament voltage control circuit 30 through resistor R22. Pin 5 of chip U4 is grounded through resistor R26.

[0080] In this embodiment, the output voltage regulation of both the filament voltage control circuit 30 and the high-voltage voltage control circuit 20 is achieved by the same chip, greatly reducing the circuit cost.

[0081] The output voltage regulation formula of chip U4 is Vout = D * Vin * (1 + 47K / 9.1K), where D is the duty cycle output by chip U1, and Vin is the high-level voltage (100% duty cycle) output by pins 10 and 6 of chip U1. For example, when the duty cycle = 50%, substituting into the formula, the output voltage is:

[0082] 0.5 * 3.3 * (1 + 47K / 9.1K) = 10.17V.

[0083] The design key point of the present utility model is that it mainly uses a voltage sampling circuit and a current sampling circuit to detect the power of the soft X-ray tube in real time to determine whether the soft X-ray tube is working properly and then timely control the working state of the soft X-ray tube;

[0084] Secondly, through the voltage regulation circuit, the corresponding output voltage can be reasonably adjusted according to the actual use requirements, and then it can adapt to soft X-ray tubes with different voltage requirements. Moreover, the filament voltage control circuit and the high-voltage voltage control circuit share the same chip, reducing the circuit cost;

[0085] Furthermore, by adopting an amplifying circuit, the collected voltage and current can be amplified and then sent to the main control chip. Moreover, the voltage sampling circuit and the current sampling circuit share the same chip, reducing the circuit cost;

[0086] In addition, the overall circuit structure is ingeniously and reasonably designed to ensure the stability and reliability of the DC watt-hour meter during use.

[0087] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A soft X-ray circuit structure for static elimination, characterized in that: It includes a main control circuit, a filament power supply isolation power supply circuit, a voltage multiplier rectification circuit, a power drive circuit, a voltage sampling circuit, a current sampling circuit, a soft X-ray tube for generating soft X-rays, a filament voltage control circuit for controlling the filament voltage of the soft X-ray tube, and a high-voltage control circuit for controlling the voltage generated by ions of the soft X-ray tube; The main control circuit is respectively connected to the enable terminals of both the filament voltage control circuit and the high-voltage control circuit, and the output terminal of the filament voltage control circuit is connected to the soft X-ray tube through the filament power supply isolation power supply circuit; The output terminal of the high-voltage control circuit is connected to the power drive circuit to provide a high-voltage signal to the power drive circuit, the main control circuit is connected to the input terminal of the power drive circuit to send a drive signal to the power drive circuit, and the output terminal of the power drive circuit is connected to the soft X-ray tube through the voltage multiplier rectification circuit to drive the soft X-ray tube to work according to the drive signal; The voltage sampling circuit and the current sampling circuit are respectively connected to the voltage multiplier rectification circuit, and the main control circuit is respectively connected to the voltage sampling circuit and the current sampling circuit to send the sampled voltage and current to the main control circuit, and then judge whether the soft X-ray tube is working normally.

2. The soft X-ray circuit structure for static elimination according to claim 1, wherein: The main control circuit includes a chip U1, and the chip U1 has main control pins 1 to 16; The main control pin 39 is connected to the high-voltage control circuit, the main control pin 41 is connected to the filament voltage control circuit, and the main control pins 40 and 42 are respectively connected to the power drive circuit.

3. The soft X-ray circuit structure for static elimination according to claim 1, wherein: The main control circuit is respectively connected to the voltage sampling circuit and the current sampling circuit through a sampling and amplifying circuit.

4. The soft X-ray circuit structure for static elimination according to claim 3, wherein: The sampling and amplifying circuit includes a chip U3, a resistor R29, a resistor R31, a resistor R32, a resistor R35, a resistor R36, a resistor R33, a resistor R30, capacitors C36, C37, C42, C38, C39, and C40; Both ends of the resistor R29 are respectively connected to the pin 1 of the chip U3 and the main control circuit, the resistor R29 is grounded through the capacitor C36, the resistors R31 and R32 are in series, the non-series node of the resistor R31 is connected to the voltage sampling circuit, the non-series node of the resistor R31 is also grounded through the capacitor C37, the non-series node of the resistor R32 is connected to the pin 1 of the chip U3, and the series node of the resistors R31 and R32 is connected to the pin 2 of the chip U3, and the pins 3 and 4 of the chip U3 are both grounded; The pin 8 of the chip U3 is used to connect to the VCC5 voltage, both ends of the resistor R30 are respectively connected to the pin 7 of the chip U3 and the main control circuit, the resistor R30 is grounded through the capacitor C42, the resistors R33 and R34 are in series, the non-series node of the resistor R33 is connected to the pin 7 of the chip U3, the non-series node of the resistor R34 is grounded, and the series node of the resistors R33 and R34 is connected to the pin 6 of the chip U3, and the pin 6 of the chip U3 is connected to the pin 7 of the chip U3 through the capacitor C38; Resistor R35 and resistor R36 are connected in series. The non - series node of resistor R36 is connected to the current sampling circuit. The non - series node of resistor R35 is connected to pin 5 of chip U3. The series node of resistor R35 and resistor R36 is grounded through capacitor C39. Pin 8 of chip U3 is grounded through capacitor C40.

5. The soft X-ray circuit structure for static elimination according to claim 1, wherein: It also includes a voltage regulation circuit. The main control circuit is connected to the filament voltage control circuit and the high - voltage control circuit respectively through the voltage regulation circuit to regulate the filament voltage and the high - voltage.

6. The soft X-ray circuit structure for static elimination according to claim 5, characterized in that: The voltage regulation circuit includes chip U4, capacitor C30, capacitor C43, capacitor C33, capacitor C56, capacitor C57, capacitor C31, capacitor C45, capacitor C44, capacitor C34, capacitor C32, resistor R48, resistor R19, resistor R15, resistor R20, resistor R16, resistor R23, resistor R18, resistor R24, resistor R22, resistor R26 and resistor R25; Pin 1 of chip U4 is connected to the high - voltage control circuit through resistor R15. The high - voltage control circuit is also grounded through capacitor C43. Resistor R19 and resistor R20 are connected in series. The non - series node of resistor R19 is connected to the main control circuit. The non - series node of resistor R20 is connected to pin 2 of chip U4. The series node of resistor R19 and resistor R20 is grounded through capacitor C30. Pin 2 of chip U4 is grounded through capacitor C33. Pin 3 of chip U4 is connected to the high - voltage control circuit through resistor R16. Pin 3 of chip U4 is also grounded through resistor R23. Pin 1 of chip U4 is connected to pin 3 of chip U4 through capacitor C57. Capacitor C56 and resistor R48 are connected in series. Capacitor C57 is connected in parallel to the non - series node of capacitor C56 and resistor R48; Pin 4 of chip U4 is grounded; Pin 8 of chip U4 is used to connect to the VCC5 voltage. Pin 8 of chip U4 is grounded through capacitor C32. Pin 7 of chip U4 is connected to the filament voltage control circuit through resistor R18. The filament voltage control circuit is grounded through capacitor C45. Capacitor C44 is connected in parallel across both ends of capacitor C45. Resistor R24 and resistor R25 are connected in series. The non - series node of resistor R25 is connected to the main control circuit. The non - series node of resistor R24 is connected to pin 6 of chip U4. The series node of resistor R24 and resistor R25 is grounded through capacitor C31. Pin 6 of chip U4 is grounded through capacitor C34. Pin 5 of chip U4 is connected to the filament voltage control circuit through resistor R22. Pin 5 of chip U4 is grounded through resistor R26.

7. The soft X-ray circuit structure for static elimination according to claim 1, wherein: The voltage - doubling rectification circuit includes transformer T1, resistor R45, several voltage - doubling units connected in series, and the positive output terminal and negative output terminal connecting the soft X - ray tube; Pin 4 of transformer T1 is grounded. Pin 3 of transformer T1 is connected to the output terminal of the power drive circuit through capacitor C15. Pin 2 of transformer T1 is grounded and pin 2 of transformer T1 is connected to one end of resistor R45. Pin 1 of transformer T1 and the other end of resistor R45 are respectively connected to the first input terminal and the second input terminal of the voltage - doubling unit at the head end. The other end of resistor R45 is also connected to the current sampling circuit; The first output terminal and the second output terminal of the voltage multiplier unit located at the tail end are respectively connected to the positive output terminal and the negative output terminal, and the negative output terminal is connected to the voltage sampling circuit.

8. The soft X-ray circuit structure for static elimination according to claim 7, characterized in that: The voltage multiplier unit includes a first capacitor, a second capacitor, a first diode and a second diode; The positive electrode of the first diode and the negative electrode of the second diode are commonly connected to one end of the first capacitor, and the negative electrode of the first diode is connected to the positive electrode of the second diode through the second capacitor; The other end of the first capacitor and the negative electrode of the first diode are respectively the first input terminal and the second input terminal of the voltage multiplier unit, and the positive and negative electrodes of the second diode are respectively the second output terminal and the first output terminal of the voltage multiplier unit.

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