Distributed X-ray Light Source Emission Control Device

Abstract

Embodiments of the present disclosure disclose a distributed X-ray light source emission control device, including: a controller configured to output a digital pulse sequence signal; a pulse selection circuit connected to the controller and including a plurality of switches, the pulse selection circuit being configured to receive the digital pulse sequence signal and select one of the plurality of switches to conduct according to the digital pulse sequence signal to output a first pulse signal; and a pulse generation circuit connected to the pulse selection circuit and including a plurality of pulse generation units, the plurality of pulse generation units being respectively connected to the plurality of switches, wherein the pulse generation unit connected to the switch that outputs the first pulse signal generates a second pulse signal according to a positive voltage signal, a negative voltage signal, and the first pulse signal, and outputs the generated second pulse signal to the cathode module, and the amplitude of the second pulse signal is greater than the amplitude of the first pulse signal.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic technologies, and in particular, to a distributed X-ray source emission control device. Background Art

[0002] Since X-rays were discovered by Roentgen in 1895, X-rays have been widely used in various fields, such as industrial non-destructive testing, security inspection, medical diagnosis and treatment, etc. X-ray fluoroscopic imaging devices made using the high penetration ability of X-rays play an important role in people's daily lives. Such imaging devices have experienced a development process from early film-based planar fluoroscopic imaging devices to current digital, multi-view, and high-resolution three-dimensional imaging devices.

[0003] As an advanced imaging device, a Computed Tomography (CT) device uses computer three-dimensional reconstruction technology to obtain high-definition three-dimensional stereoscopic images or slice images. In currently popular CT devices, the X-ray generating device needs to move around the object to be measured on a slip ring. When the object to be measured is in motion or rapid detection is required, the motion speed requirement for the X-ray generating device is very high, resulting in disadvantages such as reduced reliability and stability of the device, motion artifacts in the image, and poor clarity.

[0004] Distributed X-ray light sources have been widely studied at home and abroad in recent years. Its working principle is as follows: The cathodes of the electron emission units are arranged in an array, and the voltage between the cathode and the grid is used to control the emission of electrons, so as to control each cathode to emit electrons in sequence, and bombard the target points at the corresponding sequential positions on the anode to form a distributed X-ray source. Using the electron switching trigger of the cathode instead of the mechanical motion of the traditional CT improves the imaging speed and clarity.

[0005] Disclosure Content

[0006] According to one aspect of the present disclosure, there is provided a distributed X-ray light source emission control device, including:

[0007] A controller configured to output a digital pulse sequence signal;

[0008] A pulse selection circuit connected to the controller and including a plurality of switches. The pulse selection circuit is configured to receive the digital pulse sequence signal and select one of the plurality of switches to conduct according to the digital pulse sequence signal to output a first pulse signal; and

[0009] A pulse generation circuit, connected to the pulse selection circuit and including a plurality of pulse generation units, wherein the plurality of pulse generation units are respectively connected to the plurality of switches. The pulse generation unit connected to the switch for outputting the first pulse signal generates a second pulse signal based on a positive voltage signal, a negative voltage signal, and the first pulse signal, and outputs the generated second pulse signal to the cathode module. The amplitude of the second pulse signal is greater than that of the first pulse signal. During the high level of the first pulse signal, the generated second pulse signal is the positive voltage signal, and during the low level of the first pulse signal, the generated second pulse signal is the negative voltage signal.

[0010] In one embodiment, the cathode module includes a plurality of cathode units. One ends of the plurality of cathode units are respectively connected to the plurality of pulse generation units, and the other ends of the plurality of cathode units are connected to each other. The cathode module is configured to generate a pulse signal according to the second pulse signal through the cathode unit connected to the pulse generation unit for outputting the second pulse signal.

[0011] In one embodiment, the controller further includes:

[0012] A counter, configured to count the digital pulse sequence signal to generate a count value, generate a binary code according to the count value, and send the binary code to the pulse selection circuit.

[0013] In one embodiment, the pulse selection circuit is further configured to:

[0014] Receive the binary code and determine to turn on one of the plurality of switches to output the first pulse signal according to the received binary code.

[0015] In one embodiment, the number of switches included in the pulse selection circuit is greater than or equal to the number of cathode units.

[0016] In one embodiment, when the number of switches included in the pulse selection circuit is greater than the number of cathode units, a binary bit 0 is input to the unused switches.

[0017] In one embodiment, the distributed X-ray light source emission control device further includes:

[0018] A positive voltage pulse sequence signal generator, connected between the controller and the pulse generation circuit, and configured to receive the digital pulse sequence signal and generate the positive voltage signal according to the digital sequence pulse signal.

[0019] In one embodiment, the positive voltage pulse sequence signal generator includes:

[0020] A digital-to-analog converter, connected to the controller and configured to receive the digital pulse sequence signal and convert the digital pulse sequence signal into an analog pulse sequence signal; and

[0021] A first operational amplifier, connected between the digital-to-analog converter and the pulse generation circuit and configured to receive the analog pulse sequence signal and amplify the analog pulse sequence signal to output an amplified analog pulse sequence signal to the pulse generation circuit as the positive voltage signal.

[0022] In one embodiment, the distributed X-ray light source emission control device further includes:

[0023] A feedback circuit, connected between the controller and the cathode module and configured to integrate the cathode pulse signal output by the cathode module to generate a synthesized pulse sequence signal, process the synthesized pulse sequence signal, and feed the processed signal back to the controller.

[0024] In one embodiment, the feedback circuit includes:

[0025] A sampling resistor, one end of the sampling resistor is connected to the pulse generation circuit and the ground voltage, and the other end of the sampling resistor is connected to the cathode module;

[0026] A preprocessor, connected to the cathode module and configured to integrate the cathode pulse signal output by the cathode module to generate a synthesized pulse sequence signal and preprocess the synthesized pulse sequence signal to generate a preprocessed synthesized pulse sequence signal; and

[0027] An analog-to-digital converter, connected to the preprocessor and configured to perform analog-to-digital conversion on the preprocessed synthesized pulse sequence signal to generate a digital synthesized pulse sequence signal and output the generated digital synthesized pulse sequence signal to the controller.

[0028] In one embodiment, preprocessing the synthesized pulse sequence signal includes:

[0029] Amplifying the synthesized pulse sequence signal.

[0030] In one embodiment, the controller is further configured to:

[0031] Receive the generated digital synthesized pulse sequence signal, calculate the output current pulse sequence signal of the cathode module according to the digital synthesized pulse sequence signal and the resistance value of the sampling resistor, compare the output current pulse sequence signal with the reference current pulse sequence signal stored in the controller, and output the comparison result to the digital-to-analog converter.

[0032] In one embodiment, the digital-to-analog converter is further configured to:

[0033] Receive the comparison result, adjust the amplitude of the analog pulse sequence signal according to the comparison result, and output the adjusted analog pulse sequence signal to the first operational amplifier. Description of the Drawings

[0034] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above and other objects, features and advantages of the present disclosure will become clearer. In the drawings:

[0035] Figure 1 is a schematic structural diagram of a cathode unit according to an embodiment of the present disclosure;

[0036] Figure 2 is a schematic structural diagram of a distributed X-ray light source according to an embodiment of the present disclosure;

[0037] Figure 3 shows a circuit diagram of a distributed X-ray light source emission control device according to an embodiment of the present disclosure;

[0038] Figure 4 shows a timing diagram of a digital pulse sequence signal and a plurality of first pulse signals generated according to the pulse sequence according to an embodiment of the present disclosure;

[0039] Figure 5 shows a circuit diagram of a pulse generation unit according to an embodiment of the present disclosure;

[0040] Figure 6 shows a timing diagram of an output value of a first operational amplifier and a plurality of second pulse signals generated according to the output value of the first operational amplifier according to an embodiment of the present disclosure;

[0041] Figure 7 shows a circuit diagram of a first operational amplifier according to an embodiment of the present disclosure; and

[0042] Figure 8 shows a circuit diagram of a feedback circuit according to an embodiment of the present disclosure.

[0043] The drawings do not show all the circuits or structures of the embodiments. The same reference numerals throughout the drawings denote the same or similar components or features. DETAILED DESCRIPTION

[0044] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0045] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The words "a", "an (kind)" and "the" used herein should also include the meanings of "multiple" and "multiple", unless the context clearly indicates otherwise. In addition, the terms "including", "comprising" and the like used herein indicate the presence of features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0046] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0047] Figure 1 1 is a schematic diagram showing the structure of a cathode unit 100 included in a distributed X-ray source according to an embodiment of the present disclosure. The cathode unit 100 may be a grid electron gun, and may be composed of a cathode emitter 110, a grid 120, and an anode target 130. When a negative voltage is applied to the grid 120, the cathode emitter 110 does not emit electrons, so the cathode unit 100 does not generate X-rays; and when a positive voltage is applied to the grid 120, the electrons emitted by the cathode emitter 110 pass through the grid 120 and hit the anode target 130 to generate X-rays. The emission amount of electrons can be adjusted by controlling the voltage value on the grid 120, thereby adjusting the output of X-rays.

[0048] Figure 2 2 is a schematic diagram showing the structure of a distributed X-ray light source 200 according to an embodiment of the present disclosure. The distributed X-ray light source 200 may include a plurality of cathode units. When the distributed X-ray light source 200 is working, the electrons emitted by each cathode emitter may pass through their respective grids in turn and hit different positions of the anode target to generate X-rays.

[0049] Figure 3 FIG. 3 is a schematic diagram of a distributed X-ray light source emission control device 300 according to an embodiment of the present disclosure. The distributed X-ray light source emission control device 300 is used to control Figure 2The distributed X-ray light source 200 shown in [figure] generates X-rays. The emission control device 300 of the distributed X-ray light source may include: a controller 310, a pulse selection circuit 320, and a pulse generation circuit 330. The controller 310 may be configured to output a digital pulse sequence signal. The controller 310 may further include: a counter configured to count the digital pulse sequence signal to generate a count value, generate a binary code according to the count value, and send the binary code to the pulse selection circuit 320. The pulse selection circuit 320 may be connected to the controller 310 and includes a plurality of switches. The pulse selection circuit 320 may be configured to receive the digital pulse sequence signal and select one of the plurality of switches to conduct according to the digital pulse sequence signal to output a first pulse signal. The pulse selection circuit 320 may be a programmable logic device, a data selector, a decoder, or a shift register.

[0050] The pulse selection circuit 320 may further be configured to: receive the binary code and determine to conduct one of the plurality of switches according to the received binary code to output a first pulse signal. For example, as Figure 3 shown, port I is the input terminal of the digital pulse sequence, and ports E x ~E0 are the switch selection input terminals. When the current pulse input to port I is the m-th (0 <= m <= n, where n is the number of cathode units described below) pulse in the digital pulse sequence signal, at the rising edge of the m-th pulse, the binary code of value m is input to ports E x ~E0, then the Y m -th switch is selected to conduct to output a first pulse signal; the remaining switches are turned off to output a low-level signal. Similarly, when the current pulse input to port I is the (m + 1)-th pulse, at the rising edge of the (m + 1)-th pulse, the binary code of value (m + 1) is input to ports E x ~E0, then the Y m+1 -th switch is selected to conduct to output a first pulse signal; the remaining switches are turned off to output a low-level signal, and so on, thereby realizing the switching of the pulse position.

[0051] Figure 4A timing diagram of a digital pulse sequence signal according to an embodiment of the present disclosure and a multiplexed first pulse signal generated according to the digital pulse sequence signal is shown. The numbers of the input digital pulse sequence are 0, 1, 2, ..., n, 0, 1, 2, ..., n, 0, 1.... When the current pulse input to port I is the 0th pulse, the 0th switch is selected to conduct according to the binary encoding of the value 0, and the 0th first pulse is output; when the current pulse input to port I is the 1st pulse, the 1st switch is selected to conduct according to the binary encoding of the value 1, and the 1st first pulse is output; when the current pulse input to port I is the 2nd pulse, the 2nd switch is selected to conduct according to the binary encoding of the value 2, and the 2nd first pulse is output, and so on. When the current pulse input to port I is the nth pulse, the nth switch is selected to conduct according to the binary encoding of the value n, and the nth first pulse is output, as Figure 4 shown.

[0052] The pulse generation circuit 330 can be connected to the pulse selection circuit 320 and can include a plurality of pulse generation units. The plurality of pulse generation units can be respectively connected to a plurality of switches in the pulse selection circuit 320. The pulse generation unit connected to the switch that outputs the first pulse signal generates a second pulse signal according to a positive voltage signal, a negative voltage signal, and the first pulse signal, and outputs the generated second pulse signal to the cathode module 340, wherein the amplitude of the second pulse signal is greater than the amplitude of the first pulse signal. The positive voltage signal can be provided by the following first operational amplifier 360 and the range of the positive voltage signal can be 36V to 100V, and the negative voltage signal can be provided by the negative voltage source 390 and the range of the negative voltage signal can be -200V to -80V. During the high level of the first pulse signal, the generated second pulse signal is a positive voltage signal, and during the low level of the first pulse signal, the generated second pulse signal is a negative voltage signal.

[0053] Figure 5The circuit diagram of a pulse generation unit according to an embodiment of the present disclosure is shown. When a first pulse signal is input to the pulse generation unit, during the high level of the first pulse signal, the first pulse signal can drive the switch S1 to conduct via the buffer Buff1. At this time, the switch S2 is turned off, and the pulse generation unit can output a positive voltage signal that is the same as the positive voltage signal applied to the switch S1 at this time. And during the low level of the first pulse signal, the first pulse signal can drive the switch S2 to conduct via the inverting buffer Buff2. At this time, the switch S1 is turned off, and the pulse generation unit outputs a negative voltage signal that is the same as the negative voltage signal applied to the switch S2, thereby realizing the conversion of the first pulse signal into the second pulse signal. The timing diagrams of the output value of the first operational amplifier (i.e., the positive voltage signal) and the multiplexed second pulse signals generated according to the output value of the first operational amplifier are as Figure 6 shown. The switches S1 and S2 include but are not limited to transistors, MOSFETs, optoelectronic switches, and IGBTs. The Buff1 and Buff2 include but are not limited to discrete half-bridge drivers, integrated half-bridge drivers, optoelectronic isolation drivers, etc.

[0054] The distributed X-ray light source emission control device 300 may further include a positive voltage pulse sequence signal generator 302. The positive voltage pulse sequence signal generator 302 may be connected between the controller 310 and the pulse generation circuit 330, and may be configured to receive a digital pulse sequence signal and generate a positive voltage signal according to the digital sequence pulse signal. The positive voltage pulse sequence signal generator 302 may include a digital-to-analog converter 350 and a first operational amplifier 360. The digital-to-analog converter 350 may be connected to the controller 310, and may be configured to receive a digital pulse sequence signal and convert the digital pulse sequence signal into an analog pulse sequence signal. The first operational amplifier 360 may be connected between the digital-to-analog converter 350 and the pulse generation circuit 330, and may be configured to receive the analog pulse sequence signal and amplify the analog pulse sequence signal to output the amplified analog pulse sequence signal as the above positive voltage signal to the pulse generation circuit 330.

[0055] Figure 7 The circuit diagram of the first operational amplifier 360 according to an embodiment of the present disclosure is shown. The analog pulse sequence signal from the digital-to-analog converter 350 is input to the non-inverting input terminal of the first operational amplifier 360. The inverting input terminal of the first operational amplifier 360 is grounded via the resistor Rx and connected to the output terminal of the first operational amplifier 360 via the resistor Rf.

[0056] The amplification factor A of the first operational amplifier 360 can be determined by the following formula:

[0057]

[0058] where R x is the resistance value of resistor Rx, and R f is the resistance value of resistor Rf. The first operational amplifier 360 can be composed of a class-A operational amplifier and discrete components, or can be composed of a class-B operational amplifier and discrete components. Among them, the output voltage range of the class-A operational amplifier is 0 to 200V, and the output voltage range of the class-B operational amplifier is 0 to 36V. Of course, the first operational amplifier 360 is not limited to this.

[0059] The cathode module 340 can include a plurality of cathode units. One ends of the plurality of cathode units can be respectively connected to the plurality of pulse generation units, and the other ends of the plurality of cathode units can be connected to each other. The cathode unit connected to the pulse generation unit that outputs the second pulse signal generates a cathode pulse signal according to the second pulse signal. It should be noted that the number of switches included in the pulse selection circuit 320 is greater than or equal to the number of cathode units. When the number of switches included in the pulse selection circuit 320 is greater than the number of cathode units, a binary bit 0 can be input to the unused switches.

[0060] The plurality of cathode units in the cathode module 340 respectively output cathode pulse signals. Since only one cathode unit is activated at each moment, the multiplexed cathode pulse signals can be integrated into a composite pulse sequence signal to correspond to the pulse sequence signal input to the pulse selection circuit.

[0061] The distributed X-ray light source emission control device 300 can further include a feedback circuit 301. The feedback circuit 301 can be connected between the controller 310 and the cathode module 340, and is configured to process the composite pulse sequence signal output by the cathode module 340, and feed the processed signal back to the controller 310.

[0062] Figure 8 Shows a circuit diagram of the feedback circuit 301 according to an embodiment of the present disclosure.

[0063] The feedback circuit 301 can include: a sampling resistor Rs, a pre-processor 370, and an analog-to-digital converter 380 (for example, ADC, etc.). One end of the sampling resistor Rs can be connected to the pulse generation circuit 330 and the ground voltage, and the other end of the sampling resistor Rs can be connected to the cathode module 340 and the pre-processor 370. The pre-processor 370 can be connected to the cathode module 340, and can be configured to pre-process (for example, amplify, impedance transformation, etc.) the composite pulse sequence signal output by the cathode module 340 to generate a pre-processed composite pulse sequence signal. The analog-to-digital converter 380 can be connected to the pre-processor 370, and can be configured to perform analog-to-digital conversion on the pre-processed signal to generate a digital composite pulse sequence signal, and output the generated digital composite pulse sequence signal to the controller 310.

[0064] The controller 310 can be further configured to: receive the generated digital synthesized pulse sequence signal, calculate the output current pulse sequence signal of the cathode module 340 (i.e., the actual emission current of the cathode unit) according to the digital synthesized pulse sequence signal and the resistance value of the sampling resistor Rs, compare the output current pulse sequence signal with the reference current pulse sequence signal stored in the controller 340, and output the comparison result to the digital-to-analog converter 350. It should be noted that each pulse value output from the analog-to-digital converter 380 needs to be corresponding to the number of the pulse sequence signal to distinguish the pulse currents (emission currents) of different cathode units.

[0065] The controller may further include a communication interface. The communication interface can be configured to receive parameter configurations (such as the duty cycle, frequency, emission current value, etc. of the digital current pulse sequence), and obtain the reference current pulse sequence signal according to the parameter configurations, so as to compare with the actual emission current, and adjust the output value of the digital-to-analog converter to achieve the purpose of stabilizing the emission current. The controller includes but is not limited to: single-chip microcomputer, DSP, FPGA, CPLD and any combination thereof.

[0066] The digital-to-analog converter 350 can be further configured to: receive the comparison result, adjust the amplitude of the analog pulse sequence signal according to the comparison result, and output the adjusted analog pulse sequence signal to the first operational amplifier 360.

[0067] The distributed X-ray light source emission control device according to an embodiment of the present disclosure can output the second pulse to the cathode unit in turn, so that the cathode unit generates X-rays in turn. In addition, by setting a feedback circuit in the distributed X-ray light source emission control device, the adjustment of the digital pulse sequence signal from the controller can be realized, so as to realize the adjustment of the consistency and the control of the stability of the X-rays emitted by the cathode unit.

[0068] Some block diagrams and / or flowcharts are shown in the drawings. It should be understood that some blocks or combinations of blocks in the block diagrams and / or flowcharts can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general computer, a special computer or other programmable data processing devices, so that when executed by the processor, these instructions can create a device for implementing the functions / operations illustrated in these block diagrams and / or flowcharts.

[0069] Accordingly, the techniques of the present disclosure may be implemented in the form of hardware and / or software (including firmware, microcode, etc.). Additionally, the techniques of the present disclosure may take the form of a computer program product on a computer-readable medium storing instructions, which can be used by or in conjunction with an instruction execution system (e.g., one or more processors). In the context of the present disclosure, a computer-readable medium can be any medium that can contain, store, transmit, propagate, or transport instructions. For example, a computer-readable medium may include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, components, or propagation media. Specific examples of computer-readable media include: magnetic storage devices, such as magnetic tapes or hard disk drives (HDDs); optical storage devices, such as compact discs (CD-ROMs); memories, such as random access memories (RAMs) or flash memories; and / or wired / wireless communication links.

[0070] The foregoing detailed description has set forth numerous embodiments of the distributed X-ray light source emission control device by using diagrams, flowcharts, and / or examples. In the case where such diagrams, flowcharts, and / or examples contain one or more functions and / or operations, those skilled in the art should understand that each function and / or operation in such diagrams, flowcharts, or examples can be implemented individually and / or jointly by various architectures, hardware, software, firmware, or substantially any combination thereof. In one embodiment, several parts of the subject matter of the embodiments of the present disclosure can be implemented by application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), or other integrated formats. However, those skilled in the art should recognize that some aspects of the embodiments disclosed herein can be equivalently implemented, in whole or in part, in integrated circuits, as one or more computer programs running on one or more computers (e.g., as one or more programs running on one or more computer systems), as one or more programs running on one or more processors (e.g., as one or more programs running on one or more microprocessors), as firmware, or substantially as any combination of the above, and those skilled in the art, based on the present disclosure, will have the ability to design circuits and / or write software and / or firmware code. Additionally, those skilled in the art will recognize that the mechanisms of the subject matter of the present disclosure can be distributed as a variety of forms of program products, and the exemplary embodiments of the subject matter of the present disclosure apply regardless of the specific type of signal-bearing medium actually used to perform the distribution. Examples of signal-bearing media include, but are not limited to: recordable media, such as floppy disks, hard disk drives, compact discs (CDs), digital versatile discs (DVDs), digital tapes, computer memories, etc.; and transmission media, such as digital and / or analog communication media (e.g., fiber optic cables, waveguides, wired communication links, wireless communication links, etc.).

Claims

1. A distributed X-ray light source emission control device, comprising: A controller configured to output a digital pulse sequence signal; A pulse selection circuit connected to the controller and including a plurality of switches, the pulse selection circuit being configured to receive the digital pulse sequence signal and select one of the plurality of switches to conduct according to the digital pulse sequence signal to output a first pulse signal; And A pulse generation circuit connected to the pulse selection circuit and including a plurality of pulse generation units, the plurality of pulse generation units being respectively connected to the plurality of switches, wherein the pulse generation unit connected to the switch that outputs the first pulse signal generates a second pulse signal according to a positive voltage signal, a negative voltage signal, and the first pulse signal, and outputs the generated second pulse signal to a cathode module, wherein the amplitude of the second pulse signal is greater than the amplitude of the first pulse signal, and during the high level of the first pulse signal, the generated second pulse signal is the positive voltage signal, and during the low level of the first pulse signal, the generated second pulse signal is the negative voltage signal.

2. The distributed X-ray light source emission control device according to claim 1, wherein The cathode module includes a plurality of cathode units, one ends of the plurality of cathode units are respectively connected to the plurality of pulse generation units, and the other ends of the plurality of cathode units are connected to each other, and the cathode unit connected to the pulse generation unit that outputs the second pulse signal generates a cathode pulse signal according to the second pulse signal.

3. The distributed X-ray light source emission control device according to claim 2, wherein, The controller further includes: A counter configured to count the digital pulse sequence signal to generate a count value, generate a binary code according to the count value, and send the binary code to the pulse selection circuit.

4. The distributed X-ray light source emission control device according to claim 3, wherein, The pulse selection circuit is further configured to: Receive the binary code and determine to conduct one of the plurality of switches to output the first pulse signal according to the received binary code.

5. The distributed X-ray light source emission control device according to claim 4, wherein, The number of switches included in the pulse selection circuit is greater than or equal to the number of cathode units.

6. The distributed X-ray light source emission control device according to claim 5, wherein, When the number of switches included in the pulse selection circuit is greater than the number of cathode units, a binary bit 0 is input to the unused switches.

7. The distributed X-ray light source emission control device according to claim 2, further comprising: A positive voltage pulse sequence signal generator connected between the controller and the pulse generation circuit and configured to receive the digital pulse sequence signal and generate a positive voltage signal according to the digital sequence pulse signal.

8. The distributed X-ray light source emission control device according to claim 7, wherein, The positive voltage pulse sequence signal generator includes: A digital-to-analog converter connected to the controller and configured to receive the digital pulse sequence signal and convert the digital pulse sequence signal into an analog pulse sequence signal; and A first operational amplifier connected between the digital-to-analog converter and the pulse generation circuit and configured to receive the analog pulse sequence signal and amplify the analog pulse sequence signal to output the amplified analog pulse sequence signal to the pulse generation circuit as the positive voltage signal.

9. The distributed X-ray light source emission control device according to claim 8, further comprising: A feedback circuit is connected between the controller and the cathode module, and is configured to integrate the cathode pulse signal output by the cathode module to generate a synthesized pulse sequence signal, process the synthesized pulse sequence signal, and feed the processed signal back to the controller.

10. The distributed X-ray light source emission control device according to claim 9, wherein, The feedback circuit includes: A sampling resistor, one end of the sampling resistor is connected to the pulse generation circuit and the ground voltage, and the other end of the sampling resistor is connected to the cathode module; A pre-processor, connected to the cathode module, and configured to integrate the cathode pulse signal output by the cathode module to generate a synthesized pulse sequence signal, and pre-process the synthesized pulse sequence signal to generate a pre-processed synthesized pulse sequence signal; and An analog-to-digital converter, connected to the pre-processor, and configured to perform analog-to-digital conversion on the pre-processed synthesized pulse sequence signal to generate a digital synthesized pulse sequence signal, and output the generated digital synthesized pulse sequence signal to the controller.

11. The distributed X-ray light source emission control device according to claim 10, wherein, Pre-processing the synthesized pulse sequence signal includes: Amplifying the synthesized pulse sequence signal.

12. The distributed X-ray light source emission control device according to claim 10, wherein, The controller is further configured to: Receive the generated digital synthesized pulse sequence signal, calculate the output current pulse sequence signal of the cathode module according to the digital synthesized pulse sequence signal and the resistance value of the sampling resistor, compare the output current pulse sequence signal with the reference current pulse sequence signal stored in the controller, and output a comparison result to the digital-to-analog converter.

13. The distributed X-ray light source emission control device according to claim 12, wherein, The digital-to-analog converter is further configured to: Receive the comparison result, adjust the amplitude of the analog pulse sequence signal according to the comparison result, and output the adjusted analog pulse sequence signal to the first operational amplifier.

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