CN219893496U

CN219893496U - X-ray generator of handheld security inspection instrument

Info

Publication number: CN219893496U
Application number: CN202222652757.1U
Authority: CN
Inventors: 殷卫红
Original assignee: Huaxin Zhongan Beijing Security Service Co ltd
Current assignee: Huaxin Zhongan Beijing Security Service Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-10-24
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses an X-ray generator of a handheld security inspection instrument, which comprises a high-voltage host and a high-voltage controller, wherein the high-voltage host is connected with the high-voltage controller; the high-pressure host is provided with a high-pressure oil tank, a control circuit and an X-ray tube; the high-pressure oil tank is connected to the control circuit, the control circuit is also connected to the X-ray tube, and the high-pressure host is connected to the battery. The X-ray generator of the handheld security inspection instrument has compact structure, light weight and convenient carrying by a user. Meanwhile, the X-ray emitting device has strong penetrating power, stable internal structure of the device, more optimized design layout, durability and low failure rate, adapts to different requirements, can be quickly adjusted, optimizes the final imaging effect and optimizes the use feeling of a user.

Description

X-ray generator of handheld security inspection instrument

Technical Field

The utility model relates to an X-ray generator of a handheld security inspection instrument, and belongs to the technical field of operation X-ray equipment.

Background

An X-ray generator is a device that generates X-rays and is a core of an X-ray imaging system. The X-ray equipment is widely applied to the fields of medical treatment, cargo security inspection, scientific research and the like, and the requirements of the fields on the X-ray equipment are different due to the different fields of application of the X-ray equipment. In the technical fields of cargo security inspection, safety inspection and the like, the X-ray equipment is required to be more convenient for operators to carry, has high penetrating power, low failure rate and the like. However, most of the existing X-ray devices are applied to the medical field and do not have the above requirements.

In the patented patent CN 2760551Y-scaled-down inflatable portable frequency conversion X-ray generator, a portable X-ray generator is specifically disclosed, which overcomes the weight and volume problems of the traditional X-ray generator, mainly adopts a pulse transformer, an X-ray generator circuit and a C-shaped high magnetic conductive iron core which are oppositely arranged to realize the integral function, and is convenient for a user to carry due to the reduction of the size of the iron core and the corresponding reduction of the volume of a high-voltage package. However, since the X-ray generator is designed only for the purpose of downsizing and weight saving, such a design structure is rather easy to raise the failure rate of the equipment, and cannot ensure the strong radiation penetration capability of the X-ray generator, so that the popularization and the use are inconvenient.

Disclosure of Invention

The utility model aims to provide the X-ray generator of the handheld security inspection instrument, which has the advantages of compact structure, light weight and portability, and can ensure strong X-ray penetrating capacity. Stable equipment inner structure and setting method can guarantee that this handheld security check appearance X ray generator durable, fault rate are low, can adapt to different demands, optimize final imaging, optimize user's use impression.

In order to solve the technical problems, the utility model adopts the following technical scheme: the X-ray generator of the handheld security inspection instrument comprises a high-voltage host and a high-voltage controller, wherein the high-voltage host is connected with the high-voltage controller; the high-pressure host is provided with a high-pressure oil tank, a control circuit and an X-ray tube; the high-voltage oil tank is connected to the control circuit, the control circuit is also connected to the X-ray tube, and the high-voltage host is connected to the battery. In order to ensure that the X-ray generator can emit continuous and constant X-rays, the X-ray generator of the handheld security inspection instrument is matched with other components through the control circuit, so that the voltage in the X-ray generator of the handheld security inspection instrument is constant, continuous and constant rays can be output, a battery is adopted to replace a generating set, the portability of the X-ray generator is improved, and the high-voltage host and the high-voltage controller can ensure that the transmitted X-rays have strong penetrability, so that the X-ray generator of the handheld security inspection instrument is durable and has low failure rate.

In the X-ray generator of the handheld security inspection instrument, one end of the X-ray tube is provided with an anode filament, and the other end of the X-ray tube is provided with a cathode filament; the X-ray tube is provided with an anode filament, one side of which is connected with an anode starter, and the outside of one side of the X-ray tube provided with a cathode filament is provided with a focusing cover. Because the X-ray tube comprises a hot cathode and an anode, the hot cathode is made of tungsten wire wound into a spiral shape, hot electrons can be emitted after the power is on, and a focusing cover is arranged on the outer face cover of the cathode filament, electrons in the X-ray tube can stably move, and the X-ray emission effect is stable.

The control circuit is provided with a filament control circuit, a high-voltage control circuit and a sampling circuit; the filament control circuit is connected with the high-voltage control circuit, and the input end of the high-voltage control circuit is connected with the sampling circuit. The filament control circuit can play roles of filtering, isolating and transforming, and can ensure electron dissipation in the X-ray tube. The high-voltage control circuit can adjust the voltage in the circuit, so that the penetrating power of X-rays is greatly improved, and continuous and constant rays are output.

The X-ray generator of the handheld security inspection instrument is characterized in that a high-voltage inverter circuit and a filament inverter circuit are arranged in the high-voltage oil tank, the high-voltage inverter circuit is connected to the input end of the high-voltage control circuit, and the filament inverter circuit is connected to the input end of the filament control circuit. Because the high-voltage inverter circuit and the filament inverter circuit can generate a large amount of heat, insulating oil is injected into the high-voltage oil tank to ensure that the transformer can effectively dissipate heat and ensure insulation.

The battery is connected to the filament inverter circuit, and the battery is also connected to the high-voltage inverter circuit. The battery supplies power for the filament control circuit and the high-voltage control circuit, the filament control circuit provides electrons, and the high-voltage control circuit provides a high-voltage electric field for electron movement.

The X-ray generator of the handheld security inspection instrument is characterized in that a T2 first transformer and a T3 second transformer are arranged at an input port of the filament control circuit, the T2 first transformer and the T3 second transformer are sequentially connected, one end of the filament control circuit is an input port, and the other end of the filament control circuit is connected to a cathode filament side of the X-ray tube. The T2 first transformer and the T3 second transformer in the filament control circuit play a role in isolating and filtering current, the T3 second transformer also plays a role in transforming voltage, and the adjusted current is conveyed to the X-ray tube to ensure that the X-ray tube can work normally.

The input end of the high-voltage control circuit is provided with the T1 third transformer, and the T1 third transformer is connected to the two ends of the X-ray tube through the rectifying circuit. The T1 third transformer in the high-voltage control circuit changes the current into two paths of alternating current power supply, and the two paths of alternating current are boosted by the rectifying circuit and then are transmitted to two ends of the X-ray tube, so that the ray persistence of the X-ray tube is optimized.

The X-ray generator of the handheld security inspection instrument is characterized in that the control circuit is further provided with a rectifying circuit. The rectification circuit can adjust the current and the voltage connected to the high-voltage control circuit so as to ensure the voltage loaded to the X-ray tube, meet the requirement of improving the intensity of X-rays, avoid the condition of damaging the circuit and ensure the low failure rate of the X-ray generator.

In the aforementioned X-ray generator of the handheld security inspection instrument, one end of the sampling circuit is connected to the T1 third transformer, and the other end of the sampling circuit is connected to the rear part of the high-voltage controller. The high-voltage controller is connected with the control circuit through the sampling circuit, so that the effect to be realized by the X-ray generator can be conveniently adjusted. The high-voltage controller collects the current of the tube through the sampling circuit to adjust the power supply to the filament control circuit, so as to realize optimal control.

In the aforementioned X-ray generator of the handheld security inspection instrument, the high-voltage host is further provided with a connection interface of at least one external device. Through setting up external equipment's connection interface, when being convenient for gather the image, still make handheld security inspection appearance X-ray generator can increase other functions, optimize user's use experience.

Compared with the prior art, the X-ray generator of the handheld security inspection instrument has the advantages of compact equipment structure, light weight and convenience for carrying by users. Meanwhile, the penetrating power of the emitted X-rays is high, the internal structure of the equipment is stable, the design layout is more optimized, the durability and the low failure rate of the X-ray generator of the handheld security inspection instrument can be ensured, different requirements are met, the final imaging effect can be quickly adjusted, and the use experience of a user is optimized.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a control circuit diagram of the present utility model.

Reference numerals: the high-voltage power supply comprises a 1-high-voltage host, a 2-high-voltage controller, a 3-high-voltage oil tank, a 4-control circuit, a 5-X-ray tube, a 6-battery, a 7-anode starter, an 8-focusing cover, a 9-filament control circuit, a 10-high-voltage control circuit, an 11-sampling circuit, a 12-high-voltage inverter circuit, a 13-filament inverter circuit, a 14-T2 first transformer, a 15-T3 second transformer, a 16-T1 third transformer, a 17-connection interface and an 18-rectifying circuit.

The utility model is further described below with reference to the drawings and the detailed description.

Detailed Description

Example 1 of the present utility model: the X-ray generator of the handheld security inspection instrument comprises a high-voltage host 1 and a high-voltage controller 2, wherein the high-voltage host 1 is connected with the high-voltage controller 2; the high-pressure host 1 is provided with a high-pressure oil tank 3, a control circuit 4 and an X-ray tube 5; the high-pressure oil tank 3 is connected to a control circuit 4, the control circuit 4 is also connected to an X-ray tube 5, and the high-voltage host 1 is connected to a battery 6. In this embodiment, since the high-voltage host 1 operates in a high-temperature, high-frequency, high-voltage and high-current state, reasonable spacing distances are set for all components in the high-voltage host 1, and meanwhile, the compact structure of all components in the high-voltage host 1 can be ensured, so that the damage of the components in the high-voltage host 1 is avoided. The control circuit 3 is connected to the X-ray tube 5, and the control circuit 4, the X-ray tube 5, and other components may be fixed in the high-voltage main unit 1 by an insulating material such as an insulating plate, so that the structures of the respective parts in the high-voltage main unit 1 are stable. The battery 6 is adopted to supply power to replace a generator set, a stable power supply is provided, and the use of operators is facilitated. The digital imaging principle of the X-ray in the embodiment is that the battery is powered and converted into alternating current, the alternating current is rectified and filtered into direct current voltage, the direct current voltage is chopped into high frequency, the duty ratio is adjusted to change the output direct current voltage, the direct current voltage is chopped into frequency of more than 20KHz (the frequency of more than 20KHz is high frequency, the frequency of less than 20KHz is middle-low frequency), the direct current voltage is transmitted to a high-frequency transformer, the direct current voltage is rectified into the direct current voltage through multiple voltage after the voltage is boosted by the transformer, and the direct current voltage is loaded to the X-ray tube 5, so that the constant direct current voltage is formed, the X-ray emitted by the X-ray tube 5 is ensured to be continuous and constant, and the voltage in the X-ray generator of the handheld security inspection instrument is constant, and the constant X-ray can be stably and continuously output for a long time. Because the X-ray generator adopts the high-frequency and high-voltage X-ray machine, the X-ray generator has the advantages of light weight, portability, strong X-ray penetrating capacity, strong sustainability and low failure rate.

Example 2 of the present utility model: as shown in fig. 1, one end of an X-ray tube 5 is provided with an anode filament, and the other end of the X-ray tube 5 is provided with a cathode filament; an anode starter 7 is connected to one side of the X-ray tube 5 where the anode filament is provided, and a focusing cover 8 is provided on the outer side of the X-ray tube 5 where the cathode filament is provided. The X-ray tube 5 mainly comprises one hot cathode and one anode (commonly referred to as target), so that a cathode filament is provided for the hot cathode and an anode filament is provided for the anode. Since the inside of the X-ray tube 5 is usually treated in a high vacuum state, free movement of heat-emitting electrons in the X-ray tube 5 is ensured. In order to ensure the stability of heating electrons in the X-ray tube 5, a focusing cover 8 is arranged outside one side of the X-ray tube 5 provided with a cathode filament, and the focusing cover 8 is made of metal materials. And an anode starter 7 is arranged on one side of the X-ray tube 5 where the anode filament is arranged, and the anode starter 7 can be matched with the control circuit 4 to supply power to the X-ray tube 5 so as to improve the free movement level of heating electrons in the X-ray tube 5.

Example 3 of the present utility model: as shown in fig. 2, the control circuit 4 is provided with a filament control circuit 9, a high-voltage control circuit 10 and a sampling circuit 11; the filament control circuit 9 is connected with a high voltage control circuit 10, and a sampling circuit 11 is connected with the input end of the high voltage control circuit 10. One end of the filament control circuit 9 is an input port, the other end is connected to the X-ray tube 5, one end of the high-voltage control circuit 10 is an input port, and two ends of the X-ray tube 5 are connected at the same time, wherein the high-voltage control circuit 10 is connected to the filament control circuit 9 at one side of the X-ray tube 5 where a cathode is arranged. The input port of the high-voltage control circuit 10 is connected to the sampling circuit 11, and the sampling circuit 11 can collect the current in the X-ray tube 5 by connecting the high-voltage control circuit 10, so that the adjustment operation of the X-ray tube 5 can be conveniently carried out at a later stage.

In the aforementioned X-ray generator of the handheld security inspection instrument, as shown in fig. 1, a high-voltage oil tank 3 is disposed in a high-voltage host 1, a high-voltage inverter circuit 12 and a filament inverter circuit 13 are disposed in the high-voltage oil tank 3, the high-voltage inverter circuit 12 is connected to an input end of the high-voltage control circuit 10, and the filament inverter circuit 13 is connected to an input end of the filament control circuit 9. Because the high-voltage inverter circuit 12 and the filament inverter circuit 13 can generate a large amount of heat, the high-voltage inverter circuit 12 and the filament inverter circuit 13 are arranged in the high-pressure oil tank 3, and insulating oil is filled in the high-pressure oil tank 3, so that the high-voltage inverter circuit 12 and the filament inverter circuit 13 can be insulated, and meanwhile, the high-voltage inverter circuit 12 and the filament inverter circuit 13 are radiated, the burden of each part in the handheld security inspection instrument during the use of an X-ray generator is reduced, and the safety of equipment is improved. In this embodiment, since the battery 6 is used to provide energy, in order to ensure that the battery 6 provides energy to stably output X-rays for the subsequent X-ray tube 5, the high-voltage inverter circuit 12 is provided to invert the dc voltage of the battery into the high-frequency alternating voltage of 20KHz, so that the subsequent circuit can continue to perform operations such as voltage doubling processing. The filament inverter circuit 13 inverts the direct current power supply voltage of the battery 6 into a high-frequency alternating voltage of 10-90KHz, and then the alternating voltage is connected to the filament of the X-ray tube 5. The filament is powered, the filament of the X-ray tube 5 is lightened to generate hot electrons, high voltage is loaded on two ends of the cathode and anode of the X-ray tube 5, and the X-ray tube 5 emits X-rays. So as to ensure that the X-ray generator of the handheld security inspection instrument can continuously emit X-rays, and the penetration capacity of the X-rays is stronger.

In the aforementioned X-ray generator of the handheld security inspection instrument, as shown in fig. 1, the battery 6 is connected to the filament inverter circuit 13, and the battery 6 is also connected to the high-voltage inverter circuit 12. The battery 6 is used as an energy source, so that the X-ray generator of the handheld security inspection instrument has stable voltage and stable current, long-time power supply can be realized, the influence from the outside is small, and the portability of the X-ray generator is greatly improved. And the battery 6 has simple structure, convenient carrying, simple and easy charging and discharging operation, no influence of external climate and temperature, and stable and reliable performance.

Example 4 of the present utility model: in the X-ray generator of the handheld security inspection instrument, as shown in fig. 2, a first transformer 14 of T2 and a second transformer 15 of T3 are arranged at the input port of a filament control circuit 9, the first transformer 14 of T2 and the second transformer 15 of T3 are sequentially connected, one end of the filament control circuit 9 is an input port, and the other end of the filament control circuit 9 is connected to the cathode filament side of an X-ray tube 5. In the present embodiment, the input terminal of the filament control circuit 9 is divided into a line 1 and a line 2, and the line 1 and the line 2 are power supply input circuits of the X-ray tube 5, respectively. Because the power supply needs to be alternating current, the input current is input into the alternating current through the line 1 and the line 2 after the voltage is inverted by the filament inverter circuit 13, the alternating current is firstly input into the first transformer 14 through the T2, and the turns ratio of the first transformer 14 of the T2 is 9:9, mainly play isolation and filtering roles. The current processed by the T2 first transformer 14 enters the T3 second transformer 15, the turn ratio of the T3 second transformer 15 is 9:3, the functions of transformation, isolation and filtering are mainly achieved, and the power supply current passes through the T3 second transformer 15. The voltage is reduced to one third of the original voltage, and then the voltage is loaded on the cathode filament of the X-ray tube 5, and electrons are dissipated by heating the filament, so that preparation is made for the subsequent X-ray emission.

In the aforementioned X-ray generator of the handheld security inspection instrument, as shown in fig. 2, the control circuit 4 is further provided with a rectifying circuit 18. The rectifying circuit 18 can be set to be a complete rectifying circuit 18 consisting of a 10-time voltage rectifying circuit consisting of a resistor R1, diodes D1-D12 and capacitors C1-C12 and a 10-time voltage rectifying circuit consisting of a resistor R2, diodes D13-D24 and capacitors C13-C24, and the two circuits with the same structure are respectively connected to two ends of the X-ray tube 5, so that the two ends of the cathode and anode of the X-ray tube 5 can be conveniently boosted simultaneously, the optimal effect is achieved, and the penetrating capacity of X-rays is ensured. In this embodiment, with continued reference to fig. 2, the control circuit 4 is further provided with a line 5, and the line 5 serves as a ground terminal to provide equipment security for the entire control circuit 4.

In the aforementioned X-ray generator of the handheld security inspection apparatus, as shown in fig. 2, the input end of the high voltage control circuit 10 is provided with a T1 third transformer 16, and the T1 third transformer 16 is connected to two ends of the X-ray tube 5 through a rectifying circuit 18. The input ends of the high-voltage control circuit 10 are a circuit 6 and a circuit 7 respectively, the circuit 6 and the circuit 7 are power supply input circuits of high-frequency alternating current, the two circuits of the power supply input high-frequency alternating current are changed into two circuits of alternating current power supply through a T1 third transformer 16, the voltage of the two circuits of the power supply is increased by 200 times respectively, and then the two circuits of the power supply are subjected to rectification circuits, in the embodiment, the rectification circuits can be 10 times of rectification circuits, the alternating current can be converted into direct current with the voltage increased by 10 times, and two 10 times of voltage rectification circuits are formed and loaded on two ends of the X-ray tube 5. Since the voltage of the alternating current is increased by 200 times after passing through the T1 third transformer 16 and is increased to 2000 times after 10 times rectification, the voltage at two ends of the X-ray tube 5 is 4000 times of the input voltage of the line 6 and the line 7 after the two paths are connected in series. This stabilizes and sustains the X-rays emitted from the X-ray tube 5.

In the aforementioned X-ray generator of the handheld security inspection instrument, as shown in fig. 2, one end of the sampling circuit 11 is connected to the T1 third transformer 16, and the other end of the sampling circuit 11 is connected to the high voltage controller 2. The sampling circuit 11 is connected to the high voltage controller 2, and has a line 3 and a line 4 respectively, and the line 3 and the line 4 are connected to the rear portion of the T1 third transformer 16 respectively, so that the high voltage controller 2 samples through the line 3 and the line 4. Specifically, since the filament of the X-ray tube 5 is turned on to generate hot electrons, the X-ray tube 5 emits X-rays after a high voltage is applied to both ends of the cathode and anode of the X-ray tube 5. Because the working state of the X-ray tube 5 is an electron emission state (similar to a discharge arc), the stability of controlling electron emission (mA current) is particularly important, the mA current is fed back and sampled, the heating power of a filament is controlled after the mA current is compared with a given mA current, and the stability of controlling the mA current is achieved, therefore, one end of the sampling circuit 11 is connected with the high-voltage controller 2, the other end of the sampling circuit is connected with the T1 third transformer 16, so that the high-efficiency sampling is convenient, the X-ray tube 5 can be timely regulated through the high-voltage controller 2, and the X-ray generator of the handheld security inspection instrument can continuously and stably output X-rays with high penetrating power for a long time.

Example 5 of the present utility model: in the X-ray generator of the handheld security inspection instrument, as shown in fig. 1, the high-voltage host 1 is further provided with at least one connection interface 17 of external equipment. In this embodiment, in order to extend more functions of the X-ray generator of the handheld security inspection apparatus, at least one external device connection interface 17 is provided on the high-voltage host 1, so that functions of the X-ray generator of the handheld security inspection apparatus can be enriched, use feeling of operators is optimized, and the handheld security inspection apparatus is suitable for multiple purposes.

The working principle of one embodiment of the utility model is as follows: as shown in fig. 1 and 2, the X-ray generator of the handheld security inspection instrument uses the battery 6 to replace the traditional power supply, so that the device is convenient to carry, and stable energy supply is provided for the X-ray generator of the handheld security inspection instrument. The power supply of the battery 6 is correspondingly inverted through the high-voltage inverter circuit 12 and the filament inverter circuit 13, the processed direct-current voltage is inverted into high-frequency alternating voltage which is correspondingly input into the filament control circuit 9 and the high-voltage control circuit 10, the filament control circuit 9 is connected with the X-ray tube 5 to be provided with a cathode filament end for supplying power to the filament, and the filament of the X-ray tube 5 is lighted to generate hot electrons. Subsequently, the high voltage control circuit 10 loads high voltage on both ends of the cathode and anode of the X-ray tube 5, so that the X-ray tube 5 can emit X-rays. The current feedback is sampled through the sampling circuit 11, the current condition in the X-ray tube 5 is monitored in real time, and then the power supply quantity of the filament control circuit 9 can be adjusted through the high-voltage controller 2 according to the actual condition after the sampling comparison, so that the stability of the current in the X-ray tube 5 is maintained. By arranging the connection interface 17 of the external device, other control functions can be extended for the X-ray generator of the handheld security inspection instrument so as to realize more functions. And the reasonable interval among all the components in the high-voltage host 1 is reserved, so that the whole X-ray generator of the handheld security inspection instrument is compact in structure, light in weight and convenient for a user to carry. Meanwhile, the penetrating power of the emitted X-rays is high, the internal structure of the equipment is stable, the design layout is more optimized, and the equipment is durable and low in failure rate.

Claims

1. The X-ray generator of the handheld security inspection instrument comprises a high-voltage host machine (1) and a high-voltage controller (2), and is characterized in that the high-voltage host machine (1) is connected with the high-voltage controller (2); the high-pressure host machine (1) is provided with a high-pressure oil tank (3), a control circuit (4) and an X-ray tube (5); the high-pressure oil tank (3) is connected to the control circuit (4), the control circuit (4) is further connected to the X-ray tube (5), and the high-pressure host (1) is connected to the battery (6).

2. The X-ray generator of a handheld security inspection instrument according to claim 1, characterized in that an anode filament is arranged at one end of the X-ray tube (5), and a cathode filament is arranged at the other end of the X-ray tube (5); an anode starter (7) is arranged on one side of the anode filament of the X-ray tube (5), and a focusing cover (8) is arranged on the outer side of one side of the cathode filament of the X-ray tube (5).

3. The X-ray generator of a handheld security inspection instrument according to claim 2, characterized in that the control circuit (4) is provided with a filament control circuit (9), a high voltage control circuit (10) and a sampling circuit (11); the filament control circuit (9) is connected with the high-voltage control circuit (10), and the input end of the high-voltage control circuit (10) is connected with the sampling circuit (11).

4. A hand-held security inspection instrument X-ray generator according to claim 3, characterized in that a high-voltage inverter circuit (12) and a filament inverter circuit (13) are arranged in the high-voltage oil tank (3), the high-voltage inverter circuit (12) is connected to the input end of the high-voltage control circuit (10), and the filament inverter circuit (13) is connected to the input end of the filament control circuit (9).

5. The X-ray generator of a handheld security inspection instrument according to claim 4, characterized in that the battery (6) is connected to a filament inverter circuit (13), the battery (6) being further connected to a high voltage inverter circuit (12).

6. A hand-held security inspection instrument X-ray generator according to claim 3, characterized in that a T2 first transformer (14) and a T3 second transformer (15) are arranged at the input port of the filament control circuit (9), the T2 first transformer (14) and the T3 second transformer (15) are sequentially connected, and the other end of the filament control circuit (9) is connected to the cathode filament side of the X-ray tube (5).

7. The hand-held security scanner X-ray generator according to claim 6, characterized in that the control circuit (4) is further provided with a rectifying circuit (18).

8. The X-ray generator of the handheld security inspection instrument according to claim 7, wherein the input end of the high voltage control circuit (10) is provided with a T1 third transformer (16), and the T1 third transformer (16) is connected to two ends of the X-ray tube (5) through a rectifying circuit (18).

9. The X-ray generator of the handheld security inspection instrument according to claim 8, wherein one end of the sampling circuit (11) is connected to the rear part of the T1 third transformer (16), and the other end of the sampling circuit (11) is connected to the high-voltage controller (2).

10. The X-ray generator of a handheld security inspection instrument according to claim 1, characterized in that the high voltage host (1) is further provided with a connection interface (17) of at least one external device.