Voltage control method, control device, high voltage generator and voltage control system

Abstract

The invention provides a voltage control method, a control device, a high voltage generator and a voltage control system. The voltage control method comprises the following steps: sending a first driving parameter for controlling a grid-control electrode voltage of an X-ray tube to a first driving circuit in a high-voltage generator, so that the first driving circuit drives a power supply circuit corresponding to the X-ray tube in the high-voltage generator according to the first driving parameter to generate a first working voltage; and a pulse control signal is sent to the power supply circuit, so that the power supply circuit converts the first working voltage into a pulse voltage according to the pulse control signal and provides the pulse voltage to a grid control electrode of the X-ray tube.

Description

Technical Field

[0001] The present disclosure relates to the field of control, and in particular to a voltage control method, a control device, a high voltage generator, and a voltage control system. Background Art

[0002] X-ray tubes are widely used in nondestructive testing, security inspections, CT imaging, and medical applications. Currently, the most mature products are DC X-ray tubes. A DC X-ray tube primarily consists of a filament (a cathode), an anode target, and a gate electrode. When a DC X-ray tube is operating, the electron beam emitted from the filament strikes the anode target, generating X-rays. The gate electrode adjusts the electric field between the anode and cathode, thereby adjusting the intensity of the X-rays. Summary of the Invention

[0003] The inventors noted that in related art, when the X-ray tube is required to provide X-rays, corresponding voltages are supplied to the filament, anode target, and grid-controlled electrode in the X-ray tube. When the X-ray tube is no longer required to provide X-rays, the corresponding voltages are stopped. In actual working scenarios, the X-ray tube is often required to provide X-rays at regular intervals, which requires operators to repeatedly power on and off the X-ray tube, increasing the complexity of X-ray tube operation.

[0004] Accordingly, the present disclosure provides a voltage control method, which provides a pulse voltage to the gate electrode of an X-ray tube so that the X-ray tube can provide X-rays at predetermined time intervals, thereby effectively reducing the operating complexity of the X-ray tube.

[0005] In a first aspect of the present disclosure, a voltage control method is provided, which is performed by a control device in a high-voltage generator, comprising: sending a first driving parameter for controlling a voltage of a gate-controlled electrode of an X-ray tube to a first driving circuit in the high-voltage generator, so that the first driving circuit drives a power supply circuit corresponding to the X-ray tube in the high-voltage generator according to the first driving parameter to generate a first operating voltage; and sending a pulse control signal to the power supply circuit, so that the power supply circuit converts the first operating voltage into a pulse voltage according to the pulse control signal, and provides the pulse voltage to the gate-controlled electrode of the X-ray tube.

[0006] In some embodiments, the pulse voltage has a first level value during a high level period of the pulse control signal and has a second level value during a low level period of the pulse control signal, wherein the first level value is greater than the second level value.

[0007] In some embodiments, pulse current information on the line between the power supply circuit and the X-ray tube is obtained; it is determined whether the pulse current information is within a predetermined range; if the pulse current information is not within the predetermined range, the first drive parameter is updated to obtain an updated first drive parameter; and the updated first drive parameter is sent to the first drive circuit so as to control the pulse current information within the predetermined range.

[0008] In some embodiments, a second driving parameter for controlling the cathode voltage of the X-ray tube is sent to a second driving circuit in the high-voltage generator, so that the second driving circuit drives the power supply circuit according to the second driving parameter to provide a second operating voltage for the cathode of the X-ray tube.

[0009] In some embodiments, the high voltage generator includes a plurality of the power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

[0010] In some embodiments, when the pulse control signal sent to the i-th power supply circuit is at a high level, the pulse control signal sent to other power supply circuits among the N power supply circuits except the i-th power supply circuit is at a low level, 1≤i≤N, N is the total number of power supply circuits.

[0011] In a second aspect of the present disclosure, a control device is provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the voltage control method as described in any of the above embodiments based on instructions stored in the memory.

[0012] In a third aspect of the present disclosure, a high-voltage generator is provided, comprising: a control device as described in any of the above embodiments; a first drive circuit, configured to send a first drive signal to a power supply circuit corresponding to the X-ray tube according to a first drive parameter sent by the control device for controlling the gate electrode voltage of the X-ray tube; the power supply circuit, configured to generate a first operating voltage according to the first drive signal, and convert the first operating voltage into a pulse voltage according to a pulse control signal sent by the control device, and provide the pulse voltage to the gate electrode of the X-ray tube.

[0013] In some embodiments, the power supply circuit includes: a first isolation driver, configured to provide a first driving voltage to a first suspension circuit according to the first driving signal; the first suspension circuit, configured to generate the first operating voltage according to the first driving voltage, and convert the first operating voltage into the pulse voltage according to the pulse control signal, and provide the pulse voltage to the gate control electrode of the X-ray tube.

[0014] In some embodiments, the first suspension circuit includes: a gate control circuit configured to generate the first operating voltage based on the first driving voltage; a switching circuit configured to convert the first operating voltage into the pulse voltage based on the pulse control signal, and provide the pulse voltage to the gate control electrode of the X-ray tube.

[0015] In some embodiments, the first isolation driver includes an optoelectronic isolator, a wireless isolator, or an isolation transformer.

[0016] In some embodiments, a second drive circuit is further included, wherein the second drive circuit is configured to send a second drive signal to the power supply circuit according to a second drive parameter sent by the control device for controlling the cathode voltage of the X-ray tube; the power supply circuit is configured to generate a second operating voltage according to the second drive signal and provide the second operating voltage to the cathode of the X-ray tube.

[0017] In some embodiments, the power supply circuit includes: a second isolation driver configured to provide a second driving voltage to the second suspension circuit according to the second driving signal; and the second suspension circuit configured to generate the second operating voltage according to the second driving voltage and provide the second operating voltage to the cathode of the X-ray tube.

[0018] In some embodiments, the second isolation driver includes an optoelectronic isolator, a wireless isolator, or an isolation transformer.

[0019] In some embodiments, a high-voltage control circuit is further included, wherein: the high-voltage control circuit is configured to send a high-voltage control signal to the power supply circuit; the power supply circuit is configured to generate a third operating voltage according to the high-voltage control signal, and provide the third operating voltage to the high-voltage input terminal of the X-ray tube.

[0020] In some embodiments, the high voltage generator includes a plurality of the power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

[0021] In a fourth aspect of the present disclosure, a voltage control system is provided, comprising: a high voltage generator as described in any of the above embodiments; and at least one X-ray tube, wherein the at least one X-ray tube operates using the voltage provided by the high voltage generator.

[0022] In some embodiments, the system further includes: a current transformer provided on the line between the high voltage generator and each X-ray tube, configured to collect pulse current information on the line and send the pulse current information to the high voltage generator.

[0023] According to a fifth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the voltage control method as described in any of the above embodiments is implemented.

[0024] According to a sixth aspect of an embodiment of the present disclosure, a computer program product is provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, the voltage control method as described in any of the above embodiments is implemented.

[0025] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 This is a schematic structural diagram of an X-ray tube according to an embodiment of the present disclosure;

[0028] Figure 2 This is a flow chart of a voltage control method according to an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram of a pulse control signal according to an embodiment of the present disclosure;

[0030] Figure 4 This is a schematic structural diagram of a control device according to an embodiment of the present disclosure;

[0031] Figure 5 This is a schematic structural diagram of a high-voltage generator according to an embodiment of the present disclosure;

[0032] Figure 6 This is a schematic structural diagram of a power supply circuit according to an embodiment of the present disclosure;

[0033] Figure 7 This is a schematic structural diagram of a power supply circuit according to another embodiment of the present disclosure;

[0034] Figure 8 This is a schematic structural diagram of a high-voltage generator according to another embodiment of the present disclosure;

[0035] Figure 9 This is a structural diagram of a power supply circuit according to another embodiment of the present disclosure;

[0036] Figure 10This is a structural schematic diagram of a high voltage generator according to another embodiment of the present disclosure;

[0037] Figure 11 This is a structural schematic diagram of a high voltage generator according to another embodiment of the present disclosure;

[0038] Figure 12 This is a structural schematic diagram of a high voltage generator according to another embodiment of the present disclosure;

[0039] Figure 13 This is a schematic structural diagram of a voltage control system according to an embodiment of the present disclosure;

[0040] Figure 14 Schematic diagram of the structure of a voltage control system according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0042] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0043] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0044] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0045] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0046] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0047] Figure 1 Schematic diagram of the structure of an X-ray tube according to an embodiment of the present disclosure.

[0048] like Figure 1 As shown, the X-ray tube includes a filament 11 as a cathode, an anode target 12, a grid 13, a focusing electrode 14, and a cooling branch 15. When the X-ray tube is working, the electron beam emitted from the filament 11 passes through the grid 13 and hits the anode target 12, thereby generating X-rays. Figure 1 The anode 13 and the cathode 11 are used to adjust the electric field between the anode 13 and the cathode 11 so as to adjust the intensity of the X-rays.

[0049] In actual working scenarios, the X-ray tube is usually required to provide X-rays at certain time intervals, which causes the staff to repeatedly power on and off the X-ray tube, thereby increasing the complexity of operating the X-ray tube.

[0050] To solve this problem, the present disclosure provides a voltage control method, which provides a pulse voltage to the gate electrode of the X-ray tube so that the X-ray tube can provide X-rays at predetermined time intervals, thereby effectively reducing the operating complexity of the X-ray tube.

[0051] Figure 2 FIG2 is a flow chart of a voltage control method according to an embodiment of the present disclosure. In some embodiments, the following voltage control method is executed by a control device in a high voltage generator, including steps 21-22.

[0052] In step 21, a first driving parameter for controlling a gate electrode voltage of an X-ray tube is sent to a first driving circuit in a high-voltage generator, so that the first driving circuit drives a power supply circuit corresponding to the X-ray tube in the high-voltage generator according to the first driving parameter to generate a first operating voltage.

[0053] In step 22, a pulse control signal is sent to the power supply circuit so that the power supply circuit converts the first operating voltage into a pulse voltage according to the pulse control signal and provides the pulse voltage to the grid control electrode of the X-ray tube.

[0054] In some embodiments, the pulse voltage has a first level value during a high level period of the pulse control signal and has a second level value during a low level period of the pulse control signal, wherein the first level value is greater than the second level value.

[0055] It should be noted that when the cathode and anode are at negative high voltage, if the gate electrode is at a negative potential relative to the cathode, the cathode is suppressed, resulting in no electron emission from the cathode. Conversely, if the gate electrode is at a positive potential relative to the cathode, electrons emitted from the cathode pass through the grid and reach the anode target, thereby emitting X-rays.

[0056] Therefore, when the voltage provided to the gate electrode of the X-ray tube is a pulse voltage, the X-ray tube can realize pulsed electron emission, so that the X-ray tube can provide X-rays at predetermined time intervals, thereby effectively reducing the operation complexity of the X-ray tube.

[0057] In some embodiments, closed-loop control of the pulse current may be achieved by dynamically adjusting the first driving parameter.

[0058] For example, the closed-loop control of the pulse current includes the following steps.

[0059] 1) Obtain pulse current information on the line between the power circuit and the X-ray tube.

[0060] For example, the pulse current information is obtained through a current transformer provided on a line between the power supply circuit and the X-ray tube.

[0061] 2) Determine whether the pulse current information is within a predetermined range.

[0062] 3) If the pulse current information is not within the predetermined range, the first driving parameter is updated to obtain an updated first driving parameter.

[0063] 4) Sending the updated first driving parameter to the first driving circuit.

[0064] Through the above processing, the pulse current information can be controlled within a predetermined range, thereby achieving closed-loop control of the pulse current.

[0065] In some embodiments, a second driving parameter for controlling the cathode voltage of the X-ray tube is sent to a second driving circuit in the high voltage generator so that the second driving circuit drives the power supply circuit according to the second driving parameter to provide a second operating voltage for the cathode of the X-ray tube.

[0066] Through the above process, it is possible to realize that the cathode of the X-ray tube is powered by the high voltage generator, so that the cathode voltage of the X-ray tube can be conveniently adjusted as needed.

[0067] In some embodiments, the high voltage generator includes a plurality of power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

[0068] In other words, multiple X-ray tubes can be controlled using one high-voltage generator.

[0069] In some embodiments, when the pulse control signal sent to the i-th power supply circuit is at a high level, the pulse control signals sent to other power supply circuits among the N power supply circuits except the i-th power supply circuit are at a low level, 1≤i≤N, and N is the total number of power supply circuits.

[0070] For example, the high voltage generator includes power circuit 1, power circuit 2 and power circuit 3, which correspond to X-ray tube 1, X-ray tube 2 and X-ray tube 3 respectively. Figure 3 As shown, the control device sends pulse control signal 31 to power supply circuit 1, pulse control signal 32 to power supply circuit 2, and pulse control signal 33 to power supply circuit 3. This allows X-ray tube 1 to provide X-rays first, then X-ray tube 2 to provide X-rays after X-ray tube 1 stops providing X-rays, and then X-ray tube 3 to provide X-rays after X-ray tube 2 stops providing X-rays. This allows X-ray tubes 1, 2, and 3 to operate in series.

[0071] Figure 4 This is a schematic structural diagram of a control device according to an embodiment of the present disclosure.

[0072] like Figure 4 As shown, the control device 40 is in the form of a general-purpose computing device. The control device 40 includes a memory 41, a processor 42, and a bus 43 connecting different system components.

[0073] The memory 41 may include, for example, a system memory, a non-volatile storage medium, and the like. The system memory may store, for example, an operating system, application programs, a boot loader, and other programs. The system memory may include volatile storage media, such as random access memory (RAM) and / or cache memory. The non-volatile storage medium may store, for example, instructions for executing at least one embodiment of the voltage control method. Non-volatile storage media include, but are not limited to, disk storage, optical storage, flash memory, and the like.

[0074] The processor 42 may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, or as discrete hardware components such as discrete gates or transistors. Accordingly, each module, such as the acquisition module, the calculation module, and the adjustment module, may be implemented by a central processing unit (CPU) executing instructions in a memory that execute corresponding steps, or by dedicated circuits that execute corresponding steps.

[0075] For example, the processor 42 is configured to execute instructions stored in the memory to implement the following Figure 2 The method according to any one of the embodiments.

[0076] The bus 43 may use any of a variety of bus architectures, including, but not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, and a Peripheral Component Interconnect (PCI) bus.

[0077] The interfaces 44, 45, and 46 of the control device 40, as well as the memory 41 and the processor 42, can be connected via a bus 43. The input / output interface 44 provides a connection interface for input / output devices such as a display, mouse, and keyboard. The network interface 45 provides a connection interface for various networked devices. The storage interface 46 provides a connection interface for external storage devices such as floppy disks, USB flash drives, and SD cards.

[0078] Here, various aspects of the present disclosure are described with reference to flowcharts and / or block diagrams of methods, devices, and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks, can be implemented by computer-readable program instructions.

[0079] These computer-readable program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable device to produce a machine, so that the processor executes the instructions to produce means for implementing the functions specified in one or more blocks in the flowcharts and / or block diagrams.

[0080] These computer-readable program instructions may also be stored in a computer-readable memory, which cause the computer to operate in a specific manner to produce an article of manufacture, including instructions for implementing the functions specified in one or more blocks in the flowcharts and / or block diagrams.

[0081] The present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.

[0082] The present disclosure also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, which, when executed by a processor, implement the following Figure 2 The method according to any one of the embodiments.

[0083] The present disclosure also provides a computer program product, including computer instructions, wherein when the computer instructions are executed by a processor, the following is achieved: Figure 2 The method according to any one of the embodiments.

[0084] Figure 5 Schematic diagram of the structure of a high-voltage generator according to an embodiment of the present disclosure.

[0085] like Figure 5 As shown, the high voltage generator includes a control device 51, a first drive circuit 52 and a power supply circuit 53. The control device 51 is Figure 4 The control device involved in any embodiment.

[0086] The first driving circuit 52 is configured to send a first driving signal to the power supply circuit 53 corresponding to the X-ray tube according to the first driving parameter sent by the control device 51 for controlling the gate electrode voltage of the X-ray tube.

[0087] The power supply circuit 53 is configured to generate a first operating voltage according to the first driving signal, and convert the first operating voltage into a pulse voltage according to the pulse control signal sent by the control device 51, and provide the pulse voltage to the grid control electrode of the X-ray tube.

[0088] It should be noted here that when the voltage provided to the gate electrode of the X-ray tube is a pulse voltage, the X-ray tube can realize pulsed electron emission, so that the X-ray tube can provide X-rays at predetermined time intervals, thereby effectively reducing the operating complexity of the X-ray tube.

[0089] Figure 6 This is a schematic diagram of the structure of a power supply circuit according to an embodiment of the present disclosure.

[0090] like Figure 6 As shown, the power supply circuit 53 includes a first isolation driver 61 and a first suspension circuit 62 .

[0091] The first isolation driver 61 is configured to provide a first driving voltage to the first suspension circuit 62 according to a first driving signal.

[0092] For example, the first isolation driver includes an opto-isolator, a wireless isolator, or an isolation transformer.

[0093] The first suspension circuit 62 is configured to generate a first operating voltage according to the first driving voltage, convert the first operating voltage into a pulse voltage according to the pulse control signal, and provide the pulse voltage to the gate electrode of the X-ray tube.

[0094] It should be noted here that a floating circuit refers to a circuit in which there is no direct connection between the circuit and the ground (GND), that is, the potential of the circuit does not depend on the ground, but is measured and referenced relative to other circuits.

[0095] Figure 7 This is a schematic structural diagram of a power supply circuit according to another embodiment of the present disclosure.

[0096] What needs to be explained here is that Figure 7 and Figure 6 The difference is that, Figure 7 As shown, the first suspension circuit 62 includes a gate control circuit 621 and a switch circuit 622 .

[0097] The gate control circuit 621 is configured to generate a first operating voltage according to the first driving voltage.

[0098] The switch circuit 622 is configured to convert the first operating voltage into a pulse voltage according to the pulse control signal, and provide the pulse voltage to the gate electrode of the X-ray tube.

[0099] For example, the switching circuit 622 is in the on state when the pulse control signal is at a high level, thereby being able to output the first operating voltage, and is in the off state when the pulse control signal is at a low level, thereby being unable to output the first operating voltage, thereby converting the first operating voltage into a pulse voltage.

[0100] Figure 8 This is a schematic structural diagram of a high-voltage generator according to another embodiment of the present disclosure;

[0101] What needs to be explained here is that Figure 8 and Figure 5 The difference is that, Figure 8 As mentioned above, the high voltage generator further includes a second driving circuit 54 .

[0102] The second driving circuit 54 is configured to send a second driving signal to the power supply circuit 53 according to a second driving parameter for controlling the cathode voltage of the X-ray tube sent by the control device 51 .

[0103] The power supply circuit 53 is configured to generate a second operating voltage according to the second driving signal, and provide the second operating voltage to the cathode of the X-ray tube.

[0104] Through the above process, it is possible to realize that the cathode of the X-ray tube is powered by the high voltage generator, so that the cathode voltage of the X-ray tube can be conveniently adjusted as needed.

[0105] Figure 9 FIG. 4 is a structural diagram of a power supply circuit according to another embodiment of the present disclosure.

[0106] What needs to be explained here is that Figure 9 and Figure 6 The difference is that the power supply circuit further includes a second isolation driver 63 and a second suspension circuit 64 .

[0107] The second isolation driver 63 is configured to provide a second driving voltage to the second suspension circuit according to the second driving signal.

[0108] For example, the second isolation driver 63 includes an optoelectronic isolator, a wireless isolator, or an isolation transformer.

[0109] The second suspension circuit 64 is configured to generate a second operating voltage according to the second driving voltage, and provide the second operating voltage to the cathode of the X-ray tube.

[0110] It should be noted here that, since the cathode in the X-ray tube is a filament, the second suspension circuit can also be called a filament circuit.

[0111] Figure 10 Schematic diagram of the structure of a high-voltage generator according to another embodiment of the present disclosure.

[0112] What needs to be explained here is that Figure 10 and Figure 8 The difference is that the high voltage generator further includes a high voltage control circuit 55.

[0113] The high voltage control circuit 55 is configured to send a high voltage control signal to the power supply circuit 53. The power supply circuit 53 is configured to generate a third operating voltage according to the high voltage control signal and provide the third operating voltage to the high voltage input terminal of the X-ray tube.

[0114] For example, a voltage doubler rectifier and a high voltage output terminal are provided in the power supply circuit 53. The voltage doubler rectifier generates a third operating voltage according to the high voltage control signal, and the high voltage output terminal provides the third operating voltage to the high voltage input terminal of the X-ray tube.

[0115] The present disclosure is described below through a specific example.

[0116] Figure 11 Schematic diagram of the structure of a high-voltage generator according to another embodiment of the present disclosure.

[0117] like Figure 11 As shown, the first drive circuit 52 sends a first drive signal to the power supply circuit 53 corresponding to the X-ray tube based on a first drive parameter sent by the control device 51 for controlling the voltage of the X-ray tube's gate electrode. In the power supply circuit 53, the first isolation transformer 61 provides a first drive voltage to the first suspension circuit 62 based on the first drive signal. In the first suspension circuit 62, the gate control circuit 621 generates a first operating voltage based on the first drive voltage. The switch circuit 622 converts the first operating voltage into a pulsed voltage based on a pulsed control signal sent by the control device 51, and supplies the pulsed voltage to the gate electrode 111 of the X-ray tube 110.

[0118] The second drive circuit 54 sends a second drive signal to the power supply circuit 53 based on the second drive parameter for controlling the cathode voltage of the X-ray tube, sent by the control device 51. In the power supply circuit 53, the second isolation driver 63 provides a second drive voltage to the filament circuit 64 based on the second drive signal. The filament circuit 64 generates a second operating voltage based on the second drive voltage and provides the second operating voltage to the cathode 112 of the X-ray tube 110.

[0119] Furthermore, the high-voltage control circuit 55 sends a high-voltage control signal to the power circuit 53. In the power circuit 53, the voltage-doubling rectifier 65 generates a third operating voltage according to the high-voltage control signal, and the high-voltage output terminal 66 provides the third operating voltage to the high-voltage input terminal 113 of the X-ray tube 110.

[0120] That is, the above embodiments of the present disclosure control the voltages of the filament and the grid-controlled electrode of the X-ray tube by utilizing the negative high-voltage floating grid-controlled technology, so that the X-ray tube can achieve pulsed electron emission.

[0121] In some embodiments, the high voltage generator includes a plurality of power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

[0122] For example, Figure 12 As shown, the power supply circuit 53 of the high-voltage generator includes a first sub-power supply circuit 531, a second sub-power supply circuit 532, and a third sub-power supply circuit 533. In this case, the first drive circuit 52 sends a first drive signal to the first isolation transformer in the first sub-power supply circuit 531 and the first isolation transformer in the second sub-power supply circuit 532, respectively. The second drive circuit 54 sends a second drive signal to the second isolation transformer in the first sub-power supply circuit 531 and the second isolation transformer in the second sub-power supply circuit 532, respectively. The high-voltage control circuit 55 sends a high-voltage control signal to the voltage-doubling rectifier in the third sub-power supply circuit 533. The control device 51 sends pulse control signals to the first suspension circuit in the first sub-power supply circuit 531 and the first suspension circuit in the second sub-power supply circuit 532, respectively. Thus, two X-ray tubes are controlled by a single high-voltage generator.

[0123] Figure 13 This is a schematic structural diagram of a voltage control system according to an embodiment of the present disclosure.

[0124] like Figure 13 As shown, the voltage control system includes a high voltage generator 131 and at least one X-ray tube 132. The high voltage generator 131 is Figures 5 to 12 The X-ray tube 132 operates using the voltage provided by the high voltage generator 131 .

[0125] It should be noted here that, for the sake of simplicity, Figure 13 3 X-ray tubes 1321, 1322 and 1323 are shown. It will be appreciated by those skilled in the art that fewer or more X-ray tubes may be provided in the voltage control system as required.

[0126] For example, the pulse control signal sent by the high voltage generator 131 to the three X-ray tubes is as follows: Figure 3As shown, for example, high-voltage generator 131 uses pulse control signal 31 to provide a pulse voltage to X-ray tube 1321, uses pulse control signal 32 to provide a pulse voltage to X-ray tube 1322, and uses pulse control signal 33 to provide a pulse voltage to X-ray tube 1323. This allows X-ray tube 1321 to provide X-rays first, and after X-ray tube 1321 stops providing X-rays, X-ray tube 1322 provides X-rays, and after X-ray tube 1322 stops providing X-rays, X-ray tube 1323 provides X-rays. This allows X-ray tubes 1321, 1322, and 1323 to operate in series.

[0127] Figure 14 Schematic diagram of the structure of a voltage control system according to another embodiment of the present disclosure.

[0128] What needs to be explained here is that Figure 14 and Figure 13 The difference is that in Figure 14 In the embodiment, the voltage control system further includes current transformers 1331 , 1332 and 1333 provided on the line between the high voltage generator 131 and each of the X-ray tubes 1321 , 1322 and 1323 .

[0129] Current transformers 1331, 1332, and 1333 are used to collect pulse current information on the lines and send it to high-voltage generator 131. If the pulse current information is abnormal, high-voltage generator 131 adjusts its output to keep the pulse current information on each line within a predetermined range, thereby achieving closed-loop control of the pulse current.

[0130] By implementing the above-described embodiments of the present disclosure, when the voltage supplied to the gate electrode of an X-ray tube is a pulsed voltage, the X-ray tube can achieve pulsed electron emission, thereby enabling the X-ray tube to provide X-rays at predetermined time intervals, thereby effectively reducing the operational complexity of the X-ray tube. Furthermore, because the X-ray tube can achieve pulsed electron emission, it can achieve multi-source detection, reducing product costs, and can be applied to products such as multi-viewing angles and integrated backscatter.

[0131] In some embodiments, the functional units described above may be implemented as general-purpose processors, programmable logic controllers (PLC), digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present disclosure.

[0132] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0133] The description of the present disclosure is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure and to enable those skilled in the art to understand the present disclosure and design various embodiments with various modifications suitable for specific applications.

Claims

1. A voltage control method, performed by a control device in a high voltage generator, comprising: sending a first driving parameter for controlling a gate-controlled electrode voltage of the X-ray tube to a first driving circuit in the high-voltage generator, so that the first driving circuit drives a power supply circuit corresponding to the X-ray tube in the high-voltage generator according to the first driving parameter to generate a first operating voltage; A pulse control signal is sent to the power supply circuit so that the power supply circuit converts the first operating voltage into a pulse voltage according to the pulse control signal and provides the pulse voltage to the grid control electrode of the X-ray tube.

2. The voltage control method according to claim 1, wherein: The pulse voltage has a first level value during a high level period of the pulse control signal, and has a second level value during a low level period of the pulse control signal, wherein the first level value is greater than the second level value.

3. The voltage control method according to claim 1, further comprising: acquiring pulse current information on a line between the power supply circuit and the X-ray tube; determining whether the pulse current information is within a predetermined range; If the pulse current information is not within the predetermined range, updating the first driving parameter to obtain an updated first driving parameter; The updated first driving parameter is sent to the first driving circuit so as to control the pulse current information within the predetermined range.

4. The voltage control method according to claim 1, further comprising: A second driving parameter for controlling the cathode voltage of the X-ray tube is sent to a second driving circuit in the high-voltage generator, so that the second driving circuit drives the power supply circuit according to the second driving parameter to provide a second operating voltage for the cathode of the X-ray tube.

5. The voltage control method according to any one of claims 1 to 4, wherein: The high voltage generator includes a plurality of power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

6. The voltage control method according to claim 5, wherein: When the pulse control signal sent to the i-th power supply circuit is at a high level, the pulse control signals sent to other power supply circuits among the N power supply circuits except the i-th power supply circuit are at a low level, 1≤i≤N, and N is the total number of power supply circuits.

7. A control device comprising: Memory; A processor is coupled to the memory, and the processor is configured to execute the voltage control method according to any one of claims 1 to 6 based on instructions stored in the memory.

8. A high voltage generator comprising: The control device according to claim 7; a first driving circuit configured to send a first driving signal to a power supply circuit corresponding to the X-ray tube according to a first driving parameter sent by the control device for controlling a gate electrode voltage of the X-ray tube; The power supply circuit is configured to generate a first operating voltage according to the first driving signal, convert the first operating voltage into a pulse voltage according to the pulse control signal sent by the control device, and provide the pulse voltage to the grid control electrode of the X-ray tube.

9. The high voltage generator according to claim 8, wherein: The power supply circuit comprises: a first isolation driver configured to provide a first driving voltage to the first suspension circuit according to the first driving signal; The first suspension circuit is configured to generate the first operating voltage according to the first driving voltage, convert the first operating voltage into the pulse voltage according to the pulse control signal, and provide the pulse voltage to the gate control electrode of the X-ray tube.

10. The high voltage generator according to claim 9, wherein: The first suspension circuit includes: a gate control circuit configured to generate the first operating voltage according to the first driving voltage; The switch circuit is configured to convert the first operating voltage into the pulse voltage according to the pulse control signal, and provide the pulse voltage to the gate control electrode of the X-ray tube.

11. The high voltage generator according to claim 9, wherein: The first isolation driver includes an optoelectronic isolator, a wireless isolator or an isolation transformer.

12. The high voltage generator according to claim 8, further comprising a second drive circuit, wherein The second driving circuit is configured to send a second driving signal to the power supply circuit according to a second driving parameter sent by the control device for controlling the cathode voltage of the X-ray tube; The power supply circuit is configured to generate a second operating voltage according to the second driving signal and provide the second operating voltage to a cathode of the X-ray tube.

13. The high voltage generator according to claim 12, wherein: The power supply circuit comprises: a second isolation driver configured to provide a second driving voltage to the second suspension circuit according to the second driving signal; The second suspension circuit is configured to generate the second operating voltage according to the second driving voltage, and provide the second operating voltage to the cathode of the X-ray tube.

14. The high voltage generator according to claim 13, wherein: The second isolation driver includes an optoelectronic isolator, a wireless isolator or an isolation transformer.

15. The high voltage generator according to claim 8, further comprising a high voltage control circuit, wherein: The high-voltage control circuit is configured to send a high-voltage control signal to the power supply circuit; The power supply circuit is configured to generate a third operating voltage according to the high-voltage control signal, and provide the third operating voltage to a high-voltage input terminal of the X-ray tube.

16. The high voltage generator according to any one of claims 8 to 15, wherein: The high voltage generator includes a plurality of power supply circuits, wherein different power supply circuits correspond to different X-ray tubes.

17. A voltage control system comprising: The high voltage generator according to any one of claims 8 to 16; At least one X-ray tube, wherein the at least one X-ray tube operates using the voltage provided by the high voltage generator.

18. The voltage control system according to claim 17, further comprising: The current transformer provided on the line between the high voltage generator and each X-ray tube is configured to collect pulse current information on the line and send the pulse current information to the high voltage generator.

19. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the voltage control method according to any one of claims 1 to 6 is implemented.

20. A computer program product comprising computer instructions, wherein when the computer instructions are executed by a processor, the voltage control method according to any one of claims 1 to 6 is implemented.

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