CN113677079A - Control method and system for quickly adjusting dosage of X-ray tube - Google Patents
Control method and system for quickly adjusting dosage of X-ray tube Download PDFInfo
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Abstract
The invention provides a control method and a system for quickly adjusting X-ray tube dose, wherein the method comprises the following steps: acquiring a target voltage value, a target current value and target starting time of an X-ray bulb tube; inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain the target current value of the X-ray tube filament, the first-stage starting time and the second-stage starting time; in the first stage starting time, performing closed-loop control on the current value of the filament current of the X-ray tube according to the target value of the filament current of the X-ray tube; and in the second stage starting time, performing closed-loop control on the preset X-ray bulb tube voltage value and the preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value. By implementing the invention, only the preheating control is needed to be carried out when the X-ray tube emits beams, and the steady-state time of tube current is effectively shortened.
Description
Technical Field
The invention relates to the technical field of security check, in particular to a control method and a system for quickly adjusting dosage of an X-ray tube.
Background
The X-ray source is used as an important part in a security inspection machine, and directly determines whether a whole machine can reliably and stably operate, so that the performance of the X-ray source is very important. In practical applications, the security inspection machine needs to respond to the scanning requirements of goods, baggage or packages quickly, which requires the X-ray source to establish stable dose output in a very short time, thereby ensuring image quality. The X-ray tube current (tube current) determines the amount of X-ray radiation, which has a decisive influence on the quality of the final image. The tube current is formed by electrons excited by heating of the X-ray tube filament (filament) under the action of a high-voltage electric field. The temperature of the filament directly affects the current of the tube, and the temperature of the filament depends on the current of the filament. The quality of the final tube current is affected by the filament current control effect.
Since the filament has a non-linear and hysteresis characteristic, it is difficult to control the tube current of the X-ray tube indirectly, usually by controlling the filament current, accurately and quickly. If the filament current is turned on when it is desired to exit the beam, there is hysteresis in the filament temperature, causing the tube current to ramp up slowly and affecting the dose rise time.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the dose rise time is affected by the gradual rise of the X-ray source tube current, so as to provide a control method and a system for fast dose adjustment of an X-ray tube.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a control method for fast dose adjustment of an X-ray tube, including: acquiring a target voltage value, a target current value and target starting time of an X-ray bulb tube; inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain a target current value of a filament of the X-ray tube, a first-stage starting time and a second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time; within the starting time of the first stage, performing closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube; and in the starting time of the second stage, performing closed-loop control on a preset X-ray bulb tube voltage value and a preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value.
Optionally, the performing, within the first-stage starting time, closed-loop control on a current X-ray tube filament current value according to the X-ray tube filament target current value until the current X-ray tube filament current value increases to the X-ray tube filament target current value includes: in the starting time of the first stage, inputting the target current value of the filament of the X-ray tube as a given value to a filament current closed-loop control loop of the X-ray tube; the current filament current value of the X-ray tube is monitored in real time, the current filament current value of the X-ray tube is used as a feedback value and is input into an X-ray tube filament current closed-loop control loop, and closed-loop adjustment is carried out on the current filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube.
Optionally, the performing closed-loop control on a preset X-ray tube voltage value and a preset X-ray tube current value within the second-stage starting time until the current X-ray tube filament current value increases to the X-ray tube filament target current value includes: in the second stage starting time, the voltage value of the preset X-ray bulb tube is used as a voltage given value, the slope is input into the voltage closed-loop control loop of the X-ray bulb tube, the current value of the preset X-ray bulb tube is used as a current given value, and the slope is input into the current closed-loop control loop of the X-ray bulb tube; monitoring the voltage value of the current X-ray bulb tube in real time, inputting the voltage value of the current X-ray bulb tube as a feedback value into an X-ray bulb tube voltage closed-loop control loop, monitoring the current value of the current X-ray bulb tube in real time, and inputting the current value of the current X-ray bulb tube as a feedback value into an X-ray bulb tube current closed-loop control loop; and carrying out closed-loop regulation on the current voltage value of the X-ray bulb tube and the current value of the X-ray bulb tube until the current value of the filament of the X-ray tube rises to the target current value of the filament of the X-ray tube.
Optionally, the filament preheating model establishing process includes: acquiring historical voltage values of an X-ray bulb tube, historical current values of the X-ray bulb tube and historical current values of a filament of the X-ray tube; and establishing the filament preheating model according to the corresponding relation among the historical voltage value of the X-ray bulb tube, the historical current value of the X-ray bulb tube and the historical current value of the filament of the X-ray tube.
Optionally, the method for controlling the fast dose adjustment of the X-ray tube further comprises: judging whether the working exposure time interval of the X-ray tube is greater than a first preset time threshold value or not; when the working exposure time interval of the X-ray tube is larger than a first preset time threshold, updating the filament preheating model; and when the working exposure time interval of the X-ray tube is not more than a first preset time threshold, taking the current filament preheating model as a controller in the starting time of the first stage.
Optionally, before obtaining the target voltage value of the X-ray tube, the target current value of the X-ray tube, and the target start time, the method further includes: and receiving a beam-out instruction sent by the upper computer.
In a second aspect, an embodiment of the present invention provides a control system for fast dose adjustment of an X-ray tube, including: the acquisition module is used for acquiring a target voltage value of the X-ray bulb tube, a target current value of the X-ray bulb tube and target starting time; the calculation module is used for inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain the target current value of the X-ray tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time; the first modulation module is used for carrying out closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube within the starting time of the first stage until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube; and the second modulation module is used for carrying out closed-loop control on a preset X-ray bulb tube voltage value and a preset X-ray bulb tube current value within the starting time of the second stage until the current X-ray tube filament current value rises to the target X-ray tube filament current value.
In a third aspect, the present invention provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the control method for fast dose adjustment of an X-ray tube according to the first aspect of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer device, including: the control method for the dose rapid adjustment of the X-ray tube comprises a memory and a processor, wherein the memory and the processor are connected in a communication mode, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the control method for the dose rapid adjustment of the X-ray tube according to the first aspect of the embodiment of the invention.
The technical scheme of the invention has the following advantages:
the invention provides a control method for quickly adjusting X-ray tube dose, which comprises the following steps: acquiring a target voltage value, a target current value and target starting time of an X-ray bulb tube; inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain the target current value of the X-ray bulb tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time; in the first stage starting time, performing closed-loop control on the current value of the filament current of the X-ray tube according to the target value of the filament current of the X-ray tube until the current value of the filament current of the X-ray tube rises to the target value of the filament current of the X-ray tube; and in the second stage starting time, performing closed-loop control on the preset X-ray bulb tube voltage value and the preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value. And establishing a filament preheating model in the starting time of the first stage to perform intervention control at the start so as to realize the rapid adjustment of the filament current of the X-ray tube. After preheating is finished, the starting time is switched to a PI double closed-loop control method in the second stage, and accurate adjustment of the filament current of the X-ray tube is achieved. Therefore, only the X-ray tube needs to be preheated during beam outgoing, and the steady-state time of tube current is effectively shortened.
According to the control system for quickly adjusting the X-ray tube dose, the filament preheating model is established within the starting time of the first stage, and the intervention control is started, so that the quick adjustment of the filament current of the X-ray tube is realized. After preheating is finished, the starting time is switched to a PI double closed-loop control method in the second stage, and accurate adjustment of the filament current of the X-ray tube is achieved. Therefore, only the X-ray tube needs to be preheated during beam outgoing, and the steady-state time of tube current is effectively shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart of a specific example of a control method for rapid dose adjustment of an X-ray tube according to an embodiment of the present invention;
FIG. 2 is a block diagram of the control scheme for fast dose adjustment for an X-ray tube in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a start-up process in an embodiment of the present invention;
FIG. 4 is a functional block diagram of a control system for rapid X-ray tube dose adjustment in an embodiment of the present invention;
fig. 5 is a block diagram of a specific example of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a control method for quickly adjusting dosage of an X-ray tube, which comprises the following steps as shown in figure 1:
step S1: and acquiring a target voltage value of the X-ray bulb tube, a target current value of the X-ray bulb tube and target starting time.
In a specific embodiment, first, after receiving a beam-out instruction sent by an upper computer, the X-ray tube determines a target voltage value and a target current value of the X-ray tube according to a target radiation dose of the X-ray, that is, when the voltage and the current of the X-ray tube reach the target values, the radiation dose output by the X-ray tube can ensure normal operation of the security inspection device. And after the target voltage value and the target current value of the X-ray bulb tube are determined, determining target starting time according to the working time requirement of the security inspection equipment.
And acquiring a target voltage value of the X-ray bulb tube, a target current value of the X-ray bulb tube and target starting time. The target voltage value and the target current value of the X-ray bulb tube are X-ray
Step S2: inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into the filament preheating model to obtain the target current value of the X-ray bulb tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time.
In one embodiment, the target voltage value of the X-ray tube, the target current value of the X-ray tube and the start time are input into the filament preheating model, and each point in the exposure combination is traversed from the filament preheating model to screen out the target current value of the X-ray tube filament and the start time of the first stage corresponding to the target voltage value of the X-ray tube and the target current value of the X-ray tube. In addition, the target starting time is a fixed value, and the first-stage starting time can be determined according to the filament preheating model, so that the second-stage starting time is obtained by subtracting the first-stage starting time from the target starting time.
Step S3: and in the starting time of the first stage, performing closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube.
In a specific embodiment, in the first stage starting time, performing closed-loop control on the current X-ray tube filament current value according to the X-ray tube filament target current value until the current X-ray tube filament current value rises to the X-ray tube filament target current value, specifically including the following steps:
step S31: and in the starting time of the first stage, inputting the target current value of the filament of the X-ray tube as a given value into a filament current closed-loop control loop of the X-ray tube.
Step S32: and monitoring the current filament current value of the X-ray tube in real time, inputting the current filament current value of the X-ray tube as a feedback value into an X-ray tube filament current closed-loop control loop, and performing closed-loop regulation on the current filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to a target filament current value of the X-ray tube.
In an embodiment of the present invention, as shown in fig. 2, during the first phase start-up time, the preheat model is used as a controller in the X-ray tube filament current closed-loop control loop. And inputting the target current value of the filament of the X-ray tube, which is obtained by calculation of the preheating model, into the closed-loop control loop of the filament current of the X-ray tube as a given value, and inputting the current value Ifil of the filament of the X-ray tube as a feedback value into the closed-loop control loop of the filament current of the X-ray tube, so as to control the variable current of the filament to rise. And monitoring whether the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube according to the feedback value. When the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube, the fact that the heat of the filament rapidly reaches the target value is indicated, and the X-ray tube finishes the starting work of the first stage. The target current value of the filament of the X-ray tube, which is obtained by calculation of the preheating model, is used as a given value and is input into the filament current closed-loop control loop of the X-ray tube, so that the continuity of control parameters is ensured.
Step S4: and in the second stage starting time, performing closed-loop control on the preset X-ray bulb tube voltage value and the preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value.
In one embodiment, in the second stage starting time, the method performs closed-loop control on the preset X-ray tube voltage value and the preset X-ray tube current value until the current X-ray tube filament current value increases to the X-ray tube filament target current value, and includes the following steps:
step S41: and in the second stage starting time, the preset voltage value kV of the X-ray bulb tube is used as a voltage given value, the slope is input into the voltage closed-loop control loop of the X-ray bulb tube, the preset current value mA of the X-ray bulb tube is used as a current given value, and the slope is input into the current closed-loop control loop of the X-ray bulb tube.
Step S42: and monitoring the current voltage value of the X-ray bulb tube in real time, inputting the current voltage value of the X-ray bulb tube as a feedback value into the voltage closed-loop control loop of the X-ray bulb tube, monitoring the current value of the X-ray bulb tube in real time, and inputting the current value of the X-ray bulb tube as a feedback value into the current closed-loop control loop of the X-ray bulb tube.
Step S43: and carrying out closed-loop regulation on the current voltage value of the X-ray bulb tube and the current value of the current X-ray bulb tube until the current value of the filament of the X-ray tube rises to the target current value of the filament of the X-ray tube.
In the embodiment of the present invention, during the second stage start-up time, as shown in fig. 2, the X-ray tube filament current closed-loop control loop is switched to the X-ray tube current closed-loop control loop, and the X-ray tube voltage closed-loop control loop is started at the same time. And taking the preset X-ray bulb tube voltage value as a voltage given value in an X-ray bulb tube voltage closed-loop control loop, and taking the preset X-ray bulb tube current value as a current given value in an X-ray bulb tube current closed-loop control loop, wherein the preset X-ray bulb tube voltage value and the preset X-ray bulb tube current value are both given by slopes, and the slope rising time is the second-stage starting time. When closed-loop regulation is carried out after preheating of the starting time in the first stage is finished, overshoot in the rising process can be effectively reduced by inputting the preset voltage value of the X-ray bulb and the current value slope of the preset X-ray bulb into the double closed-loop control circuit, impact loss to the bulb and a filament is reduced, and the service life of the bulb can be effectively prolonged.
And further, the current voltage value of the X-ray bulb tube is used as a feedback value and input into the voltage closed-loop control loop of the X-ray bulb tube, and the current value of the X-ray bulb tube is used as a feedback value and input into the current closed-loop control loop of the X-ray bulb tube. And regulating the slope given input value through the difference value of the given value and the feedback value to enable the X-ray bulb tube to reach the target voltage value and the target current value of the X-ray bulb tube within the set target starting time, so as to realize the rapid and stable rise of the dosage. As shown in fig. 3, for the whole process of starting the X-ray tube, during the starting time of the first phase (i.e. phase 1), the fast adjustment of the filament current of the X-ray tube is realized. During the second phase start-up time (i.e., phase 2), a fine adjustment of the X-ray tube filament current is achieved.
The invention provides a control method for quickly adjusting X-ray tube dose, which comprises the following steps: acquiring a target voltage value, a target current value and target starting time of an X-ray bulb tube; inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain the target current value of the X-ray bulb tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time; in the first stage starting time, performing closed-loop control on the current value of the filament current of the X-ray tube according to the target value of the filament current of the X-ray tube until the current value of the filament current of the X-ray tube rises to the target value of the filament current of the X-ray tube; and in the second stage starting time, performing closed-loop control on the preset X-ray bulb tube voltage value and the preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value. And establishing a filament preheating model in the starting time of the first stage to perform intervention control at the start so as to realize the rapid adjustment of the filament current of the X-ray tube. After preheating is finished, the starting time is switched to a PI double closed-loop control method in the second stage, and accurate adjustment of the filament current of the X-ray tube is achieved. Therefore, only the X-ray tube needs to be preheated during beam outgoing, and the steady-state time of tube current is effectively shortened.
In one embodiment, the filament preheating model establishing process includes the following steps:
step S21: acquiring historical voltage values of an X-ray bulb tube, historical current values of the X-ray bulb tube and historical current values of a filament of the X-ray tube;
step S22: and establishing a filament preheating model according to the corresponding relation of the historical voltage value of the X-ray bulb tube, the historical current value of the X-ray bulb tube and the historical current value of the filament of the X-ray tube.
In one embodiment, during the modeling of the filament preheating model, the X-ray tube traverses each point in the exposure assembly to obtain the historical voltage value of the X-ray tube, the historical current value of the X-ray tube, and the historical current value of the X-ray tube filament. And then storing the historical voltage value of the X-ray bulb tube, the historical current value of the X-ray bulb tube and the historical current value of the filament of the X-ray tube corresponding to each exposure into a table, then inquiring the corresponding filament current of the X-ray tube according to the voltage of the X-ray bulb tube and the current of the X-ray bulb tube to be exposed, and obtaining numerical values in the non-table by methods including but not limited to interpolation, fitting, approximation and the like so as to establish a filament preheating model. The filament preheating model is used as a controller in the starting process of the first stage of controlling the filament current later. The normal exposure can be carried out after the filament preheating model is established, firstly, the target voltage value and the target current value of the X-ray bulb tube are obtained, and then the target current value of the filament of the X-ray tube is obtained according to the filament preheating model. And loading the target current value of the filament of the X-ray tube by the X-ray tube so that the heat of the filament meets the requirement of exposing out beams. And then switching to double closed loop control, and enabling the ray dose to reach a target value within set starting time by slope setting of a preset X-ray bulb tube voltage value and a preset X-ray bulb tube current value.
In one embodiment, the control method for the fast dose adjustment of the X-ray tube further comprises the following steps:
step S23: and judging whether the working exposure time interval of the X-ray tube is greater than a first preset time threshold value or not.
Step S24: and when the working exposure time interval of the X-ray tube is greater than a first preset time threshold, updating the filament preheating model.
Step S25: and when the working exposure time interval of the X-ray tube is not more than a first preset time threshold, taking the current filament preheating model as a controller in the starting time of the first stage.
In one embodiment, the X-ray tube is determined during the first operation, and if the exposure time interval is greater than N days from the last operation, the tube training operation is automatically performed. The filament preheating model can be updated every time the tube is trained, the reduction of system performance caused by the difference of the use time or the use environment is avoided, and the performance of the X-ray source is ensured to be optimal constantly. The first preset time threshold value can be set according to actual conditions.
An embodiment of the present invention provides a control system for fast dose adjustment of an X-ray tube, as shown in fig. 4, including:
the acquisition module 1 is used for acquiring a target voltage value of the X-ray bulb tube, a target current value of the X-ray bulb tube and target starting time. For details, refer to the related description of step S1 in the above embodiment, and are not described herein again.
And the calculation module 2 is used for inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into the filament preheating model to obtain the target current value of the X-ray tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time. For details, refer to the related description of step S2 in the above embodiment, and are not described herein again.
And the first modulation module 3 is used for performing closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube within the starting time of the first stage until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube. For details, refer to the related description of step S3 in the above embodiment, and are not described herein again.
And the second modulation module 4 is used for performing closed-loop control on the preset voltage value of the X-ray bulb tube and the preset current value of the X-ray bulb tube within the starting time of the second stage until the current value of the filament current of the X-ray tube rises to the target current value of the filament of the X-ray tube. For details, refer to the related description of step S4 in the above embodiment, and are not described herein again.
According to the control system for quickly adjusting the X-ray tube dose, the filament preheating model is established within the starting time of the first stage, and the intervention control is started, so that the quick adjustment of the filament current of the X-ray tube is realized. After preheating is finished, the starting time is switched to a PI double closed-loop control method in the second stage, and accurate adjustment of the filament current of the X-ray tube is achieved. Therefore, only the X-ray tube needs to be preheated during beam outgoing, and the steady-state time of tube current is effectively shortened.
An embodiment of the present invention further provides a computer device, as shown in fig. 5, the device may include a processor 61 and a memory 62, where the processor 61 and the memory 62 may be connected by a bus or in another manner, and fig. 5 takes the connection by the bus as an example.
The processor 61 may be a Central Processing Unit (CPU). The Processor 61 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 62, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the corresponding program instructions/modules in embodiments of the present invention. The processor 61 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 62, namely, implementing the control method for the rapid dose adjustment of the X-ray tube in the above method embodiment.
The memory 62 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 61, and the like. Further, the memory 62 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 62 may optionally include memory located remotely from the processor 61, and these remote memories may be connected to the processor 61 via a network. Examples of such networks include, but are not limited to, the internet, intranets, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory 62 and, when executed by the processor 61, perform the control method for X-ray tube dose rapid adjustment provided by the practice of the present invention.
The details of the computer device can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to fig. 3, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program that can be stored in a computer-readable storage medium and that when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (9)
1. A method of controlling rapid X-ray tube dose adjustment, comprising:
acquiring a target voltage value, a target current value and target starting time of an X-ray bulb tube;
inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain a target current value of a filament of the X-ray tube, a first-stage starting time and a second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time;
within the starting time of the first stage, performing closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube;
and in the starting time of the second stage, performing closed-loop control on a preset X-ray bulb tube voltage value and a preset X-ray bulb tube current value until the current X-ray tube filament current value is increased to the target X-ray tube filament current value.
2. The method for controlling rapid dose adjustment of an X-ray tube according to claim 1, wherein the performing closed-loop control on the current X-ray tube filament current value according to the target X-ray tube filament current value until the current X-ray tube filament current value rises to the target X-ray tube filament current value during the first-stage start-up time comprises:
in the starting time of the first stage, inputting the target current value of the filament of the X-ray tube as a given value to a filament current closed-loop control loop of the X-ray tube;
the current filament current value of the X-ray tube is monitored in real time, the current filament current value of the X-ray tube is used as a feedback value and is input into an X-ray tube filament current closed-loop control loop, and closed-loop adjustment is carried out on the current filament current value of the X-ray tube until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube.
3. The method for controlling rapid dose adjustment of an X-ray tube according to claim 1, wherein the performing closed-loop control on a preset X-ray tube voltage value and a preset X-ray tube current value until the current X-ray tube filament current value increases to the target X-ray tube filament current value during the second stage start-up time comprises:
in the second stage starting time, the voltage value of the preset X-ray bulb tube is used as a voltage given value, the slope is input into the voltage closed-loop control loop of the X-ray bulb tube, the current value of the preset X-ray bulb tube is used as a current given value, and the slope is input into the current closed-loop control loop of the X-ray bulb tube;
monitoring the voltage value of the current X-ray bulb tube in real time, inputting the voltage value of the current X-ray bulb tube as a feedback value into an X-ray bulb tube voltage closed-loop control loop, monitoring the current value of the current X-ray bulb tube in real time, and inputting the current value of the current X-ray bulb tube as a feedback value into an X-ray bulb tube current closed-loop control loop;
and carrying out closed-loop regulation on the current voltage value of the X-ray bulb tube and the current value of the X-ray bulb tube until the current value of the filament of the X-ray tube rises to the target current value of the filament of the X-ray tube.
4. The method of claim 1 wherein the filament preheat model building process comprises:
acquiring historical voltage values of an X-ray bulb tube, historical current values of the X-ray bulb tube and historical current values of a filament of the X-ray tube;
and establishing the filament preheating model according to the corresponding relation among the historical voltage value of the X-ray bulb tube, the historical current value of the X-ray bulb tube and the historical current value of the filament of the X-ray tube.
5. The control method for X-ray tube dose flash adjustment according to claim 1, further comprising:
judging whether the working exposure time interval of the X-ray tube is greater than a first preset time threshold value or not;
when the working exposure time interval of the X-ray tube is larger than a first preset time threshold, updating the filament preheating model;
and when the working exposure time interval of the X-ray tube is not more than a first preset time threshold, taking the current filament preheating model as a controller in the starting time of the first stage.
6. The method for controlling rapid dose adjustment of an X-ray tube according to claim 1, further comprising, before obtaining the target X-ray tube voltage value, the target X-ray tube current value, and the target start time: and receiving a beam-out instruction sent by the upper computer.
7. A control system for rapid X-ray tube dose adjustment, comprising:
the acquisition module is used for acquiring a target voltage value of the X-ray bulb tube, a target current value of the X-ray bulb tube and target starting time;
the calculation module is used for inputting the target voltage value of the X-ray bulb tube, the target current value of the X-ray bulb tube and the starting time into a filament preheating model to obtain the target current value of the X-ray tube filament, the first-stage starting time and the second-stage starting time, wherein the target starting time is equal to the sum of the first-stage starting time and the second-stage starting time;
the first modulation module is used for carrying out closed-loop control on the current filament current value of the X-ray tube according to the target filament current value of the X-ray tube within the starting time of the first stage until the current filament current value of the X-ray tube rises to the target filament current value of the X-ray tube;
and the second modulation module is used for carrying out closed-loop control on a preset X-ray bulb tube voltage value and a preset X-ray bulb tube current value within the starting time of the second stage until the current X-ray tube filament current value rises to the target X-ray tube filament current value.
8. A computer-readable storage medium storing computer instructions for causing a computer to execute the method for controlling X-ray tube dose rapid adjustment according to any one of claims 1 to 6.
9. A computer device, comprising: a memory and a processor, the memory and the processor are connected with each other in communication, the memory stores computer instructions, and the processor executes the computer instructions to execute the control method for X-ray tube dose rapid adjustment according to any one of claims 1-6.
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| CN114578750A (en) * | 2022-03-07 | 2022-06-03 | 天津美腾科技股份有限公司 | Source control circuit, method and apparatus for an X-ray apparatus |
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| CN116113129A (en) * | 2023-02-28 | 2023-05-12 | 无锡日联科技股份有限公司 | Output voltage adjustable power supply control system for X-ray source |
| CN116113129B (en) * | 2023-02-28 | 2023-09-12 | 无锡日联科技股份有限公司 | Output voltage adjustable power supply control system for X-ray source |
| CN116172543A (en) * | 2023-04-23 | 2023-05-30 | 安徽硕金医疗设备有限公司 | Magnetic resonance rapid imaging method and system |
| CN116403875A (en) * | 2023-06-06 | 2023-07-07 | 有方（合肥）医疗科技有限公司 | Method and device for quickly adjusting tube current of X-ray tube and CT (computed tomography) equipment |
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