Exposure control method, apparatus, and digital photography device

Abstract

The application discloses an exposure control method and device and a digital photography device. The digital photography device is applied to the digital photography device. A head rotating component of a head can move a generator, so that images of multiple angles can be shot. When shooting, the head rotating component is controlled to make the generator move towards a specified shooting position, and position information of the generator is monitored. A timing duration is set for a timer of a flat panel detector component based on a shooting instruction, and the flat panel detector component is controlled to open a window after the timing time of the timer ends. When it is monitored that the generator reaches the specified shooting position, the generator is controlled to emit rays to the flat panel detector component to perform exposure, so that the digital photography device shoots a target image corresponding to the shooting instruction under exposure. Since the flat panel detector and the generator of the head are directly controlled respectively during exposure, the generator and the flat panel can be independent of each other during operation and will not affect each other.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of digital photography, and in particular to an exposure control method and device and a digital photography device. BACKGROUND

[0002] Currently, the main application scenarios of medical equipment with a digital photography system include the fields of diagnostic centers, hospitals and the like, and the medical equipment plays an important role in the examination and screening of diseases. With the rapid development of automation technology, automation medical equipment in China has also developed rapidly. The intelligentization of medical equipment not only relieves the problem of excessive workload of hospital clinical diagnosis and treatment, but also helps to solve many medical problems. As the main auxiliary tool for doctors to find difficult and complicated diseases of patients, the stable and accurate shooting function of medical equipment is the most important. SUMMARY

[0003] The present application provides an exposure control method, device and digital photography device, which can solve the technical problems of delay and poor exposure angle precision in exposure shooting in the related art.

[0004] In a first aspect, an exposure control method is provided, which is applied to a digital photography device. The digital photography device includes a flat panel detector assembly, a head rotating assembly, a generator and a C-arm. The flat panel detector assembly and the head rotating assembly are respectively installed at two ends of the C-arm. The generator is connected to the head rotating assembly and opposite to the flat panel detector assembly. The generator can move on the head rotating assembly to adjust the emission position and the emission angle. The method includes the following steps:

[0005] In response to a received shooting instruction, the head rotating assembly is controlled to move towards a specified shooting position corresponding to the shooting instruction, and the position information of the head rotating assembly is monitored. The shooting instruction is used to indicate the angle and the number of times of shooting an image by the digital photography device.

[0006] Based on the shooting instruction, a timing duration is set for a timer of the flat panel detector assembly, and the flat panel detector assembly is controlled to open a window after the timing time of the timer ends.

[0007] When it is monitored that the head rotating assembly reaches the specified shooting position, the generator is controlled to emit radiation to the flat panel detector assembly for exposure, so that the digital photography device shoots a target image corresponding to the shooting instruction under exposure.

[0008] In a second aspect, the embodiments of the present application provide an exposure control device applied to a digital photography device, the digital photography device comprising: a flat panel detector assembly, a head rotating assembly, a generator and a C-arm; the flat panel detector assembly and the head rotating assembly are respectively installed at two ends of the C-arm; the generator is connected with the head rotating assembly and opposite to the flat panel detector assembly, and the generator can move on the head rotating assembly to adjust a transmission position and a transmission angle; the device comprises:

[0009] a position monitoring module configured to control the head rotating assembly to move towards a specified shooting position corresponding to a shooting instruction in response to the received shooting instruction, and monitor position information of the head rotating assembly, the shooting instruction being used to indicate an angle and a number when the digital photography device shoots an image;

[0010] a flat panel control module configured to set a timing duration for a timer of the flat panel detector assembly based on the shooting instruction, and control the flat panel detector assembly to open a window after a timing time of the timer ends;

[0011] a generator control module configured to control the generator to emit radiation to the flat panel detector assembly for exposure when it is monitored that the head rotating assembly reaches the specified shooting position, so that the digital photography device shoots a target image corresponding to the shooting instruction under exposure.

[0012] In a third aspect, the embodiments of the present application provide a computer storage medium, the computer storage medium storing a plurality of instructions, the instructions being adapted to be loaded by a processor and execute steps of the method.

[0013] In a fourth aspect, the embodiments of the present application provide a digital photography device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being adapted to be loaded by the processor and execute steps of the method.

[0014] The technical scheme provided by some embodiments of the present application has at least the following beneficial effects:

[0015] The application provides an exposure control method applied to a digital photography device, wherein a head rotating assembly of a head can move a generator to perform exposure with a flat panel detector assembly from various angles, so as to shoot images of various angles. Based on the digital photography device, after receiving a shooting instruction, the head rotating assembly is controlled to move the generator to a specified shooting position corresponding to the shooting instruction, and the position information of the generator is monitored; further, a timer of the flat panel detector assembly is set with a timing duration based on the shooting instruction, and the flat panel detector assembly is controlled to open a window after the timing time of the timer ends; meanwhile, when the generator is monitored to reach the specified shooting position, the generator is controlled to emit rays to the flat panel detector assembly to perform exposure, so that the digital photography device shoots a target image corresponding to the shooting instruction under exposure. Since the flat panel detector and the generator of the head are directly controlled respectively during exposure, the operation of the generator and the flat panel is independent of each other and does not affect each other, unnecessary delay in the control process is reduced, and the shooting efficiency of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 A component structure schematic diagram of a digital photography device provided by the embodiment of the present application;

[0018] Figure 2 A flowchart of an exposure control method provided by the embodiment of the present application;

[0019] Figure 3 A control data flow direction schematic diagram in exposure provided by the embodiment of the present application;

[0020] Figure 4 A flowchart of an exposure control method provided by the embodiment of the present application;

[0021] Figure 5 A logic flowchart of an exposure control method provided by the embodiment of the present application;

[0022] Figure 6 A structure block diagram of an exposure control device provided by the embodiment of the present application;

[0023] Figure 7 A structure schematic diagram of a digital photography device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the features and advantages of the present application more apparent and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] The following description refers to the accompanying drawings. Unless otherwise indicated, same or similar elements in different drawings have same or similar reference numerals. The implementations described in the following example embodiments are not meant to represent all implementations consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] In the medical system, the application scenarios of digital photography equipment are wide and diversified, among which the digital X-ray photography system is an important representative. The main application scenarios of medical equipment with digital photography system include diagnostic centers, hospitals and other fields, and it plays an important role especially in the examination and screening of diseases. At present, with the rapid development of automation technology, the intelligentization of medical equipment not only relieves the problem of excessive workload of hospital clinical diagnosis and treatment, but also helps to solve many medical problems. As the main auxiliary tool for doctors to find out the difficult and complex diseases of patients, the control accuracy of the equipment during shooting determines the accuracy of the photographed image. Therefore, the stable and accurate shooting function of the equipment is the most important.

[0027] The shooting of the target digital photography equipment is based on the coordination between the ray generator and the flat panel detector for exposure and image acquisition. When diagnosing different diseases at different positions of the patient, the equipment needs to be able to shoot and obtain image data at various angles set by the medical staff in advance in each shooting process. The stability and accuracy of shooting and exposure angle can help the medical staff make better diagnosis. Most of the existing various digital photography equipment adopts internal synchronization for exposure and image acquisition, that is, the processor of the equipment interacts with the flat panel detector, and then the flat panel detector interacts with the generator to control the shooting angle, and then exposure and image acquisition are performed. However, due to the delay caused by data processing and signal transmission, the time for the generator to receive the control signal and data will be delayed compared with the time for the processor to send the control instruction, thereby causing inaccurate adjustment of the shooting angle during shooting, affecting the final image effect.

[0028] Therefore, the present application provides an exposure control method to solve the technical problems of delay and poor exposure angle accuracy during shooting.

[0029] Please refer toFigure 1 , Figure 1 A component structure schematic diagram of a digital radiography device is provided in the embodiment.

[0030] As Figure 1 shown, in order to facilitate the description of the specific connection mode of each component in the digital radiography device 100, the embodiment takes the structure schematic diagram of each component in the digital radiography device 100 as an example for introduction, but the components in the digital radiography device 100 can have other specific connection modes which can be realized when the digital radiography device 100 is applied, therefore Figure 1 the component structure schematic diagram in the embodiment should not be understood as the only structure mode of the digital radiography device 100.

[0031] As Figure 1 shown, the digital radiography device 100 at least includes: a flat panel detector component 110, a head rotating component 120, a generator 130 and a C-arm 140. The imaging principle of the digital radiography device 100 is that the generator 130 emits rays to pass through an object and is received by the flat panel detector component 110, so as to realize exposure and image acquisition, therefore in the embodiment, the generator 130 keeps the opposite state with the flat panel detector component 110 in the imaging process, so that the flat panel detector component 110 can receive rays for exposure and image acquisition no matter the generator 130 is at what angle. And there is a window on the flat panel detector component 110, when exposure is needed, the generator 130 emits rays, the window on the flat panel detector component 110 is opened to receive the rays of the generator 130, so as to realize exposure and imaging; when no shooting is performed, the window on the flat panel detector component 110 is in the closed state. In the actual scene, the generator 130 can be specifically an x-ray tube component, and the flat panel detector component 110 can be specifically an amorphous silicon flat panel detector.

[0032] Optionally, the flat panel detector component 110 and the head rotating component 120 are respectively installed at two ends of the C-arm 140. Figure 1 (A) in the embodiment is a front view of the digital radiography device 100, Figure 1 (B) in the embodiment is a side view of the digital radiography device 100, in combination with Figure 1 (A) and Figure 1As shown in (B) of FIG. 1, the C-arm 140 is a "C" shaped frame, and different components are installed at two ends of the C-arm 140. In the embodiment, a flat panel detector assembly 110 is installed at one end of the C-arm 140, and a head rotating assembly 120 is installed at the other end of the C-arm 140. When the digital radiography device 100 is not started, the end where the flat panel detector assembly 110 is located is at the lower side, and the end where the head rotating assembly 120 is located is at the upper side. In addition, the digital radiography device 100 can further include a C-arm rotating assembly for rotating the C-arm 140. The C-arm rotating assembly is connected to the outer side of the C-arm 140, and the C-arm rotating assembly can rotate the C-arm 140 and the head rotating assembly 120 and the flat panel detector assembly 110 rotate around the C-arm rotating assembly at the same time.

[0033] Further, as shown in (B) of FIG. 1, Figure 1 The generator 130 is connected to the head rotating assembly 120 and opposite to the flat panel detector assembly 110. The generator 130 can move on the head rotating assembly 120 to adjust the emission position and the emission angle. Specifically, the head rotating assembly 120 further includes an arc-shaped guide rail, and the center of the arc-shaped guide rail is the center of the flat panel detector assembly 110. There is a groove track on the arc-shaped guide rail for the generator 130 to slide. The head rotating assembly 120 further includes a rotating assembly including a guide device, a transmission device and a motor driving device. The rotating assembly is connected to the generator 130 and drives the generator 130 to move on the arc-shaped guide rail, so as to change the angle and position of the radiation emitted by the generator 130. In addition, at least one position sensor can be installed on the arc-shaped guide rail. The position sensor is used to detect the position of the generator 130 on the arc-shaped guide rail, so as to accurately control the position of the generator 130.

[0034] In the embodiment, the head rotating assembly of the head of the digital radiography device can move the generator to expose the flat panel detector assembly from various angles, so as to shoot images from various angles. The position sensor in the head rotating assembly can detect and feedback the position of the generator in real time, so that the digital radiography device accurately adjusts the position of the generator to complete accurate and stable exposure imaging.

[0035] Please refer to Figure 2 , Figure 2A flowchart of an exposure control method provided by an embodiment of the present application is shown. The execution subject of the embodiment of the present application can be a digital photography device that performs exposure control, can be a processor in the digital photography device that performs the exposure control method, or can be an exposure control service in the digital photography device that performs the exposure control method. It should be noted that the processor can be, for example, a signal control board such as a single-chip microcomputer in the digital photography device, and the embodiment of the present application does not limit the specific form and specifications of the processor. For convenience of description, the specific execution process of the exposure control method is described below by taking the processor in the digital photography device as an example.

[0036] As shown in Figure 2 , the exposure control method can at least include:

[0037] S202, in response to the received shooting instruction, the control head rotating assembly is controlled to move the generator towards the specified shooting position corresponding to the shooting instruction, and the position information of the generator is monitored, the shooting instruction being used to indicate the angle and number of images when the digital photography device shoots images.

[0038] Optionally, most of the current digital photography devices are internal synchronization, that is, the processor sends a control signal related to exposure to the flat panel detector assembly after receiving the shooting instruction, and then the flat panel detector assembly interacts with the generator based on the control signal, so that the generator acts according to the shooting instruction. However, the delay caused by data processing and signal transmission can cause the control of the generator to be easily delayed, thereby causing the control accuracy of the shooting angle and the exposure angle to be poor, and affecting the final imaging effect.

[0039] Optionally, in order to eliminate the delay of the interaction between the flat panel detector assembly and the generator compared with the control instruction sent by the processor, the processor can be directly controlled to control the flat panel detector assembly and the generator respectively, without the need to control the generator through the flat panel detector assembly again, so as to speed up the signal receiving process of the generator and improve the angle control accuracy and efficiency of the generator.

[0040] Optionally, when the controller needs to use the digital photography device to shoot digital images, the shooting instruction that meets the shooting requirement of the controller is sent from the console, and the image angle and the number of images required for this shooting are indicated in the shooting instruction. Then refer to Figure 3 , Figure 3 A control data flow diagram during exposure provided by an embodiment of the present application is shown. As shown in Figure 3 , after the digital photography device receives the shooting instruction, the shooting instruction is responded to, the angle and the number of images required for this shooting are determined according to the shooting instruction, and corresponding control is performed on the flat panel detector assembly and the generator based on this.

[0041] Further, when the digital radiography device does not receive the shooting instruction, the generator is in a default position, and the shooting instruction specifies a position as the position at which the generator starts exposure and specifies a position at which the generator ends exposure. Then, after receiving the shooting instruction, the generator needs to be moved to the specified shooting position corresponding to the exposure starting point of the target image indicated by the shooting instruction first. When the generator is moved to the specified shooting position, the flat panel detector assembly is controlled to be windowed, and the generator is controlled to be started, and exposure is performed at the specified shooting position. Then, the target image corresponding to the shooting instruction is acquired.

[0042] Optionally, based on the above description of the shooting process, when the digital radiography device receives the shooting instruction, the specified shooting position corresponding to the shooting instruction is determined first, and the generator is controlled to move by the nose rotating assembly so that the generator moves toward the specified shooting position. In order to accurately know the movement of the generator and know when the generator reaches the specified shooting position, the position information of the generator is monitored during the movement of the generator, so that the flat panel detector assembly is controlled to be windowed and the generator is controlled to be started when the generator reaches the specified shooting position. In a feasible implementation, when the position of the generator is monitored, the generator can acquire and feed back its own position. The digital radiography device receives the position information reported by the generator every preset time period.

[0043] S204, set a timing duration for the timer of the flat panel detector assembly based on the shooting instruction, and control the flat panel detector assembly to open the window after the timing time of the timer ends.

[0044] Optionally, when the flat panel detector assembly is controlled, the flat panel detector assembly can be controlled to open the window in advance when the generator is about to reach the specified shooting position, so as to be ready to receive the ray signal, and facilitate the generator to perform exposure by emitting rays when the generator reaches the specified shooting position. Based on this, the flat panel detector assembly can be provided with a timer, and the timing duration of the timer is set based on the shooting information indicated in the shooting instruction, and the flat panel detector assembly is controlled to open the window after the timing time of the timer ends, so as to be ready to receive the ray signal emitted by the generator when the generator reaches the specified shooting position.

[0045] S206, when it is monitored that the generator reaches the specified shooting position, control the generator to emit rays to the flat panel detector assembly to perform exposure, so that the digital radiography device shoots the target image corresponding to the shooting instruction under exposure.

[0046] Optionally, based on the monitoring of the position of the generator, when it is monitored that the generator reaches the specified shooting position, it indicates that the exposure and image acquisition can be started at this time, and then the flat panel detector assembly has a timing end opening window, further controls the generator to emit X-rays to the flat panel detector assembly, and the exposure of the object to be shot is completed, so that the digital photography device shoots the target image corresponding to the shooting instruction under the exposure.

[0047] In the embodiment of the present application, an exposure control method is provided. Based on the digital photography device, after receiving the shooting instruction, the head rotating assembly is controlled to move the generator towards the specified shooting position corresponding to the shooting instruction, and the position information of the generator is monitored. Further, the timer of the flat panel detector assembly is set to a timing duration based on the shooting instruction, and the flat panel detector assembly is controlled to open the window after the timing of the timer ends. At the same time, when it is monitored that the generator reaches the specified shooting position, the generator is controlled to emit X-rays to the flat panel detector assembly for exposure, so that the digital photography device shoots the target image corresponding to the shooting instruction under the exposure. Since the flat panel detector and the generator of the head are directly controlled respectively during the exposure, the operation of the generator and the flat panel is independent of each other and does not affect each other, unnecessary delay in the control process is reduced, and the shooting efficiency of the device is improved.

[0048] Referring to Figure 4 , Figure 4 a flowchart of an exposure control method provided by the embodiment of the present application.

[0049] As Figure 4 shown, the exposure control method can at least include:

[0050] S402, in response to the received shooting instruction, the head rotating assembly is controlled to move the generator along the arc-shaped guide rail towards the specified shooting position corresponding to the shooting instruction.

[0051] Optionally, referring to Figure 5 , Figure 5 a logic flowchart of an exposure control method provided by the embodiment of the present application. As Figure 5 shown, after the digital photography device is started, in response to the received shooting instruction, the head rotating assembly is controlled to move the generator along the arc-shaped guide rail towards the specified shooting position corresponding to the shooting instruction according to the angle and number of the required images indicated in the shooting instruction.

[0052] S404, the signal data reported by the position sensor is received at a preset frequency, and the position information of the generator is determined according to the signal data.

[0053] Optionally, as Figure 5As shown, the generator's position information can be continuously monitored during its movement, thereby controlling the flat panel detector assembly to open the window and the generator to start when the generator reaches the designated shooting position, enabling timely and accurate exposure and image acquisition. In one feasible implementation, a position sensor mounted on the camera head rotation assembly can be used to detect the generator's real-time position on the curved guide rail. Specifically, the position sensor detects different signal data when the generator moves to different positions on the curved guide rail. The signal data reported by the position sensor is received at a preset frequency, and the generator's position information can be determined based on the signal data reported by the position sensor each time.

[0054] S406. Determine the movement time required for the generator to move to the specified shooting position corresponding to the shooting command, and determine the timing duration of the timer of the flat panel detector component based on the movement time, so that the window of the flat panel detector component has been opened when the generator moves to the specified shooting position.

[0055] Optionally, when setting a timer for the flat panel detector assembly, the purpose is to allow the flat panel detector assembly to pre-open a window to receive the X-ray signal emitted by the generator once it has reached the designated imaging position, just before the generator is about to reach that position. Then, as... Figure 5 As shown, the movement time required for the generator to reach the designated shooting position corresponding to the shooting command can be determined first. Then, the timer duration can be set according to the generator's movement time, ensuring that the flat panel detector assembly has already opened the window when the generator reaches the designated shooting position. For example, assuming the flat panel detector assembly takes a maximum of 1 second from the start of the window opening operation until the window is fully open, and the movement time required for the generator to reach the designated shooting position according to the shooting command is calculated to be 5 seconds, the timer for the flat panel detector assembly can be set to 4 seconds, so that it opens the window after 4 seconds. When the generator reaches the designated shooting position after 5 seconds, the flat panel detector assembly has already completed opening the window, at which point the generator emits rays to complete the exposure.

[0056] Optionally, the time required for the generator to move to the designated shooting position is related to its movement distance and speed. In one feasible implementation, the generator moves at a constant speed, which is determined by the digital photography device based on the generator's starting position and the designated shooting position corresponding to the shooting command. Then, based on the movement speed and the distance the generator needs to move, the time required for the generator to move from the starting position to the designated shooting position can be calculated.

[0057] Specifically, the moving speed of the object is generally based on its moving time and moving distance. Then in the embodiment of the present application, the moving distance of the generator is the distance of the trajectory between the starting position and the shooting position. In order to make the generator move from the starting position to the specified shooting position as soon as possible in a stable and safe manner, the corresponding moving speed can be pre-set for different lengths of moving distance. For example, when the moving distance of the generator is less than or equal to one fourth of the length of the movable trajectory provided by the arc-shaped guide rail, the generator is set to move at a first gear moving speed; when the moving distance of the generator is less than or equal to one half of the length of the movable trajectory provided by the arc-shaped guide rail, the generator is set to move at a second gear moving speed; when the moving distance of the generator is less than or equal to three fourths of the length of the movable trajectory provided by the arc-shaped guide rail, the generator is set to move at a third gear moving speed; and when the moving distance of the generator is greater than three fourths of the length of the movable trajectory provided by the arc-shaped guide rail, the generator is set to move at a fourth gear moving speed; and the numerical values of the first, second, third and fourth gear moving speeds are sequentially increased. Based on this, after the starting position of the generator and the specified shooting position corresponding to the shooting instruction are determined, the corresponding gear of the moving speed of the generator can be matched according to the moving distance between the two positions, and the generator is automatically triggered to move at the gear moving speed.

[0058] Further, when setting the moving speed of each gear, the mechanical characteristics of the digital photography device need to be considered, such as the gravity parameter of the generator, the shape of the moving trajectory of the generator, the resistance parameter of the driving gear of the generator, and the like. Through the combination of various software and hardware parameters, the moving speed of each gear of the generator is designed.

[0059] Alternatively, during the movement of the generator, various factors such as the driving of the device, the influence of the gravity acting on the head itself on the control of the movement of the head, and the like, can cause the generator to not completely reach the specified shooting position at a fixed moving time according to the uniform speed. Therefore, in order to more accurately control the moving time and moving speed of the generator to reach the specified shooting position, the moving time of the generator from the current position to the specified shooting position can be calculated based on the real-time position of the generator during the movement of the generator. That is, each time the latest position information of the generator is obtained, the current moving speed of the generator is recalculated based on the current position information of the generator and the specified shooting position corresponding to the shooting instruction, and the moving time required for the generator to move to the specified shooting position is further recalculated based on the current moving speed. In this way, the timing time of the flat panel detector assembly can also be updated in real time according to the real-time position of the generator, and as the generator approaches the specified shooting position, the flat panel detector assembly can control the windowing based on a more accurate and less error timing time, thereby realizing accurate control of the flat panel detector assembly and the generator.

[0060] It should be noted that the movement speed of the generator generally has a maximum speed threshold, which is a preferred speed threshold set during the design of the device considering various hardware and software parameters of the device. Therefore, whether the speed of the generator is pre-set or calculated in real time during the movement of the generator, all movement speeds of the generator need to be less than or equal to the maximum speed threshold of the generator to ensure the safety and stability of the device.

[0061] Further, when calculating the timer of the flat panel detector assembly according to the movement time of the generator, the flat panel windowing period setting time is relatively longer than the exposure period to ensure that the flat panel can completely receive the radiation signal emitted by the generator. Therefore, when calculating the timer time, factors such as movement speed fluctuation, mechanical structure error and flat panel preparation time need to be considered to set the flat panel windowing start time so that the windowing period completely contains the exposure period. Then the flat panel can completely receive the exposure data and does not interfere with the detection of the exposure angle and the triggering of the exposure action. That is, in addition to being related to the movement time of the generator, the mechanical structure influence parameters of the digital radiography device, the windowing preparation time of the flat panel detector assembly, the timing duration of the timer of the flat panel detector assembly is finally accurately calculated.

[0062] Specifically, when calculating the timing duration of the timer of the flat panel detector assembly, the mechanical structure influence parameters of the digital radiography device that affect the timing duration include but are not limited to: the transmission duration of the control signal of the flat panel detector assembly, the response duration of the flat panel detector assembly, the movement speed fluctuation parameter of the generator, the execution error parameter of each component in the device to the instruction, etc. These parameters are determined by the hardware and software characteristics of the device, and these parameters affect the execution process of the hardware components to the instruction. Therefore, when considering the timing duration of the flat panel detector assembly, these parameters need to be considered to calculate the delay time T1 that the device will produce in the mechanical structure. The more mechanical structure influence parameters, the more accurate the setting of the timing duration of the timer.

[0063] Further, the windowing preparation time of the flat panel detector assembly is determined by the mechanical structure of the flat panel detector assembly, and the composition and structure of the window and the panel determine the time T2 required for the flat panel detector assembly to completely open the window from starting to open the window. Then, in order to ensure that the window of the flat panel detector is completely opened when the generator reaches the target position, when calculating the timing duration of the timer of the flat panel detector assembly, the movement time T3 of the generator, the delay time T1 caused by the mechanical structure of the equipment, and the time T2 required for the flat panel detector assembly to completely open the window from starting to open the window need to be considered at the same time, that is, the timing duration of the timer should be T4=T3-T2-T1, so that after the timing of the timer ends for the duration of T4, the flat panel detector assembly is automatically triggered to start to perform windowing, so that the window of the flat panel detector is completely opened when the generator reaches the specified shooting position, and the smooth progress of the photography process is realized.

[0064] S408、When it is monitored that the generator reaches the specified shooting position, the generator is controlled to emit rays to the flat panel detector assembly for exposure, so that the digital photography device shoots the target image corresponding to the shooting instruction under exposure.

[0065] Regarding step S408, please refer to the detailed description in step S206, which will not be repeated here.

[0066] S410、Based on the closing signal of the generator, the flat panel detector assembly is controlled to close the window.

[0067] Optionally, the windowing time of the flat panel detector assembly completely covers the exposure time, so that after the target image is completely shot, the generator is first closed to end the exposure, and then the flat panel detector assembly is controlled to close the window based on the closing signal of the generator, so that the flat panel can completely receive the exposure data and does not interfere with the detection of the exposure angle and the triggering of the exposure action.

[0068] S412、The running states of the generator, the head rotating assembly and the flat panel detector assembly are monitored, when it is monitored that the running states of the generator and / or the head rotating assembly and / or the flat panel detector assembly are abnormal, the running of the digital photography device is interrupted, and a preset abnormal prompt information is issued; the abnormal running state data is stored.

[0069] In the embodiment of the present application, the flat panel detector assembly and the generator are controlled separately, and various state signals returned by the flat panel detector assembly, the head rotating assembly and the generator can be received simultaneously, so as to monitor the running states of the generator, the head rotating assembly and the flat panel detector assembly, to master the running states of the flat panel and the generator in real time, and to interrupt the running of the digital radiography device when the running state of the device is abnormal, to send preset abnormal prompt information, and to take preset operations such as waiting, alarming and prompting. In addition, the running data of each component can be recorded and stored during the running of the device for the reference of service personnel.

[0070] In the embodiment of the present application, an exposure control method is provided, the head rotating assembly is controlled to enable the generator to move along the arc-shaped guide rail towards the specified shooting position corresponding to the shooting instruction, the signal data reported by the position sensor is received at a preset frequency, the position information of the generator is determined according to the signal data, the movement time required for the generator to move to the specified shooting position corresponding to the shooting instruction is determined, the timing duration of the timer of the flat panel detector assembly is determined according to the movement time, and the timing time of the flat panel detector assembly can also be updated in real time according to the real-time position of the generator. With the approach of the generator to the specified shooting position, the flat panel detector assembly can control the windowing based on more accurate and smaller error timing time, so as to realize accurate control of the flat panel detector assembly and the generator. According to the mechanical structure influence parameter of the digital radiography device and the windowing preparation time of the flat panel detector assembly, the opening and closing windowing time of the flat panel detector assembly is finally accurately calculated, so that the windowing time of the flat panel detector assembly covers the exposure time, the flat panel completely receives the exposure data, and does not interfere with the detection of the exposure angle and the triggering of the exposure action. The running states of the generator, the head rotating assembly and the flat panel detector assembly are monitored, the running states of the flat panel and the generator are mastered in real time, and the running data of each component can be recorded and stored during the running of the device for the reference of service personnel.

[0071] Please refer to Figure 6 , Figure 6 The structural block diagram of an exposure control device provided in the embodiment of the present application is shown.

[0072] As shown in Figure 6 , the exposure control device 600 is applied to a digital radiography device, and the digital radiography device comprises a flat panel detector assembly, a head rotating assembly, a generator and a C-shaped arm. The flat panel detector assembly and the head rotating assembly are respectively installed at two ends of the C-shaped arm. The generator is connected with the head rotating assembly and opposite to the flat panel detector assembly, and the generator can move on the head rotating assembly to adjust the emission position and the emission angle. The exposure control device 600 comprises:

[0073] The position monitoring module 610 is configured to, in response to the received shooting instruction, control the head rotating assembly to move the generator to a specified shooting position corresponding to the shooting instruction, and monitor position information of the generator, the shooting instruction being used to indicate an angle and a number of times of shooting an image by the digital radiography device.

[0074] The panel control module 620 is configured to set a timing duration for a timer of the flat panel detector assembly based on the shooting instruction, and control the flat panel detector assembly to open a window at an end of the timing of the timer.

[0075] The generator control module 630 is configured to, when it is monitored that the generator reaches the specified shooting position, control the generator to emit radiation to the flat panel detector assembly for exposure, so that the digital radiography device shoots a target image corresponding to the shooting instruction under the exposure.

[0076] Optionally, the panel control module 620 is further configured to determine a moving time required for the generator to move to the specified shooting position corresponding to the shooting instruction, and determine the timing duration of the timer of the flat panel detector assembly according to the moving time, so that the flat panel detector assembly has opened the window when the generator moves to the specified shooting position.

[0077] Optionally, the panel control module 620 is further configured to determine a moving speed of the generator according to a starting position of the generator and the specified shooting position corresponding to the shooting instruction, and calculate the moving time required for the generator to move from the starting position to the specified shooting position based on the moving speed.

[0078] Optionally, the panel control module 620 is further configured to, each time the position information of the generator is monitored, calculate a current moving speed of the generator based on current position information of the generator and the specified shooting position corresponding to the shooting instruction, and recalculate the moving time required for the generator to move to the specified shooting position based on the current moving speed.

[0079] Optionally, the panel control module 620 is further configured to determine the timing duration of the timer of the flat panel detector assembly according to a mechanical structure influencing parameter of the digital radiography device, a window opening preparation time of the flat panel detector assembly and the moving time, and the exposure control device 600 further includes a panel closing control module configured to control the flat panel detector assembly to close the window based on a closing signal of the generator.

[0080] Optionally, the position monitoring module 610 is further configured to receive the position information reported by the generator once every preset time period.

[0081] Optionally, the head rotating assembly further comprises: an arc-shaped guide rail, a center of the arc-shaped guide rail being the center of the flat panel detector assembly, a groove track for the generator to slide being present on the arc-shaped guide rail, and at least one position sensor being installed on the arc-shaped guide rail; at this time, the position monitoring module 610 is further configured to control the head rotating assembly to move the generator along the arc-shaped guide rail towards the specified shooting position corresponding to the shooting instruction; and receive signal data reported by the position sensor according to a preset frequency, and determine the position information of the generator according to the signal data.

[0082] Optionally, the exposure control device 600 further comprises: a monitoring module configured to monitor the running states of the generator, the head rotating assembly and the flat panel detector assembly, and when an abnormal running state of the generator and / or the head rotating assembly and / or the flat panel detector assembly is monitored, interrupt the running of the digital radiography device and send a preset abnormal prompt information; and a storage module configured to store the abnormal running state data.

[0083] In the embodiments of the present application, an exposure control device is provided, wherein a position monitoring module is configured to control a head rotating assembly to move a generator towards a specified shooting position corresponding to a shooting instruction in response to the received shooting instruction, and monitor the position information of the generator, the shooting instruction being configured to indicate the angle and the number of times of shooting images by the digital radiography device; a flat panel control module is configured to set a timing duration for a timer of the flat panel detector assembly based on the shooting instruction, and control the flat panel detector assembly to open a window after the timing time of the timer ends; and a generator control module is configured to control the generator to emit radiation to the flat panel detector assembly for exposure when the generator is monitored to reach the specified shooting position, so that the digital radiography device shoots a target image corresponding to the shooting instruction under the exposure. Since the flat panel detector and the generator of the head are directly controlled respectively during the exposure, the running of the generator and the flat panel is independent of each other and will not affect each other, unnecessary delay in the control process is reduced, and the shooting efficiency of the device is improved.

[0084] The embodiments of the present application further provide a computer storage medium, which can store a plurality of instructions, the instructions being suitable for being loaded and executed by a processor to perform the steps of the method in any one of the above embodiments.

[0085] Please refer to Figure 7 , Figure 7 A structural schematic diagram of a digital radiography device is provided for the embodiments of the present application. As shown in Figure 7As shown, the digital radiography device 700 can include at least one digital radiography device processor 701, at least one network interface 704, a user interface 703, a memory 705, and at least one communication bus 702. The digital radiography device 700 further includes a flat panel detector assembly 706, a head rotating assembly 707, a generator 708, and a C-arm 709; the flat panel detector assembly 706 and the head rotating assembly 707 are respectively installed at two ends of the C-arm 709; the generator 708 is connected with the head rotating assembly 707 and is opposite to the flat panel detector assembly 706, and the generator 708 can move on the head rotating assembly 707 to adjust the emission position and the emission angle.

[0086] The communication bus 702 is configured to realize the connection and communication among the components.

[0087] The user interface 703 can include a display screen (Display) and a camera (Camera), and the optional user interface 703 can further include a standard wired interface and a wireless interface.

[0088] The network interface 704 can optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).

[0089] The digital radiography device processor 701 can include one or more processing cores. The digital radiography device processor 701 is connected with various parts in the entire digital radiography device 700 through various interfaces and lines, and performs various functions of the digital radiography device 700 and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 705, and calling data stored in the memory 705. Optionally, the digital radiography device processor 701 can be realized in at least one of a hardware form of a digital signal processing (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The digital radiography device processor 701 can be integrated with a combination of one or more of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. The CPU is mainly used to process an operating system, a user interface, and an application program; the GPU is used to render and draw the content to be displayed on the display screen; and the modem is used to process wireless communication. It can be understood that the above-mentioned modem can also not be integrated into the digital radiography device processor 701, but can be realized by a separate chip.

[0090] The memory 705 can include a random access memory (RAM) and a read-only memory (ROM). Optionally, the memory 705 includes a non-transitory computer-readable storage medium. The memory 705 can be used to store instructions, programs, codes, code sets, or instruction sets. The memory 705 can include a program storage area and a data storage area, where the program storage area can store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area can store data involved in the above-mentioned various method embodiments, etc. The memory 705 can also be at least one storage device located away from the aforementioned digital photography device processor 701. As shown in Figure 7 The memory 705 as a computer storage medium can include an operating system, a network communication module, a user interface module, and an exposure control program.

[0091] In the digital photography device 700 as shown in Figure 7 The user interface 703 is mainly used to provide an interface for user input and obtain user input data; the digital photography device processor 701 can be used to call the exposure control program stored in the memory 705 and specifically perform the following operations:

[0092] In response to the received shooting instruction, the control head rotating assembly is controlled to move the generator towards a specified shooting position corresponding to the shooting instruction, and the position information of the generator is monitored, the shooting instruction being used to indicate the angle and number of times of shooting images by the digital photography device;

[0093] A timing duration is set for a timer of the flat panel detector assembly based on the shooting instruction, and the flat panel detector assembly is controlled to open the window after the timing time of the timer ends;

[0094] When it is monitored that the generator reaches the specified shooting position, the generator is controlled to emit radiation to the flat panel detector assembly for exposure, so that the digital photography device shoots a target image corresponding to the shooting instruction under exposure.

[0095] In some embodiments, when the digital photography device processor 701 performs the step of setting a timing duration for a timer of the flat panel detector assembly based on the shooting instruction, the following steps are specifically performed: determining a movement time required for the generator to move to a specified shooting position corresponding to the shooting instruction, and determining the timing duration of the timer of the flat panel detector assembly according to the movement time, so that the flat panel detector assembly has opened the window when the generator moves to the specified shooting position. ​

[0096] In some embodiments, the digital radiography device processor 701, when determining the motion time required for the generator to move to the specified shooting position corresponding to the shooting instruction, specifically performs the following steps: determines the motion speed of the generator according to the initial position of the generator and the specified shooting position corresponding to the shooting instruction; and calculates the motion time required for the generator to move from the initial position to the specified shooting position based on the motion speed.

[0097] In some embodiments, the digital radiography device processor 701, when determining the motion time required for the generator to move to the specified shooting position corresponding to the shooting instruction, specifically performs the following steps: whenever the position information of the generator is monitored, calculates the current motion speed of the generator based on the current position information of the generator and the specified shooting position corresponding to the shooting instruction; and recalculates the motion time required for the generator to move to the specified shooting position based on the current motion speed.

[0098] In some embodiments, the digital radiography device processor 701, when determining the timing duration of the timer of the flat panel detector assembly according to the motion time, specifically performs the following steps: determines the timing duration of the timer of the flat panel detector assembly according to the mechanical structure influencing parameter of the digital radiography device, the window preparation time of the flat panel detector assembly, and the motion time; and after the digital radiography device processor 701 controls the generator to emit radiation to the flat panel detector assembly for exposure, specifically performs the following step: controls the flat panel detector assembly to close the window based on the generator shutdown signal.

[0099] In some embodiments, the digital radiography device processor 701, when monitoring the position information of the generator, specifically performs the following steps: receives the position information reported by the generator once every preset time period.

[0100] In some embodiments, the head rotating assembly 707 further comprises: an arc-shaped guide rail, the center of the arc-shaped guide rail being the center of the flat panel detector assembly, a groove track for the generator to slide being present on the arc-shaped guide rail, and at least one position sensor being installed on the arc-shaped guide rail; and when the digital radiography device processor 701 controls the head rotating assembly to move the generator towards the specified shooting position corresponding to the shooting instruction and monitors the position information of the generator, specifically performs the following steps: controls the head rotating assembly to move the generator along the arc-shaped guide rail towards the specified shooting position corresponding to the shooting instruction; and receives the signal data reported by the position sensor at a preset frequency, and determines the position information of the generator according to the signal data.

[0101] In some embodiments, the digital radiography device processor 701 further specifically performs the following steps: monitoring the running state of the generator, the head rotating assembly and the flat panel detector assembly, when the running state of the generator and / or the head rotating assembly and / or the flat panel detector assembly is monitored to be abnormal, interrupting the running of the digital radiography device, and issuing preset abnormal prompt information; storing the abnormal running state data.

[0102] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other manners. For example, the described apparatus embodiments are merely schematic. For example, the division of the modules is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the modules can be indirect coupling or communication connection through some interface, device or module, and can be electrical, mechanical or in other forms.

[0103] The modules illustrated as separated components can or can not be physically separated, and the components illustrated as modules can or can not be physical modules, i.e. can be located in one place, or can be distributed to a plurality of network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment.

[0104] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The above computer program product includes one or more computer instructions. When the above computer program instructions are loaded and executed on a computer, all or part of the processes or functions described above according to the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted by the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0105] It should be noted that for the foregoing method embodiments, in order to facilitate description, they are all described as a combination of a series of actions, but those skilled in the art should know that the present application is not limited by the order of the described actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0106] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0107] The above is the description of the exposure control method, device and digital photography equipment provided by the present application. For those skilled in the art, according to the idea of the embodiments of the present application, there will be changes in specific implementation and application range. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An exposure control method, characterized in that, An application is made in a digital photography device, the digital photography device comprising: a flat panel detector assembly, a head-rotating assembly, a generator, and a C-arm; the flat panel detector assembly and the head-rotating assembly are respectively mounted at both ends of the C-arm; the generator is connected to the head-rotating assembly and faces the flat panel detector assembly, the generator being movable on the head-rotating assembly to adjust the launch position and launch angle; the method includes: In response to a received shooting command, the camera head rotation assembly is controlled to move the generator toward the specified shooting position corresponding to the shooting command, and the position information of the generator is monitored. The shooting command is used to instruct the digital photography device on the angle and number of images to be captured. Based on the shooting command, the timer of the flat panel detector component is set to a timeout duration, and the flat panel detector component is controlled to open a window after the timer expires. When the generator is detected to have reached the designated shooting position, the generator is controlled to emit rays to the flat panel detector assembly for exposure, so that the digital photography device can capture the target image corresponding to the shooting command under exposure. The step of setting the timing duration of the timer for the flat panel detector component based on the shooting command includes: determining the movement time required for the generator to move to the specified shooting position corresponding to the shooting command, and determining the timing duration of the timer for the flat panel detector component based on the movement time, so that the flat panel detector component has opened the window when the generator moves to the specified shooting position; The step of determining the timing duration of the timer for the flat panel detector assembly based on the movement time includes: calculating the delay time generated by the mechanical structure of the digital imaging device based on the mechanical structure influence parameters of the digital imaging device, and determining the timing duration of the timer for the flat panel detector assembly by combining the window opening preparation time of the flat panel detector assembly and the movement time.

2. The method according to claim 1, characterized in that, The determination of the movement time required for the generator to move to the designated shooting position corresponding to the shooting command includes: The speed of the generator is determined based on the starting position of the generator and the specified shooting position corresponding to the shooting command. The motion time required for the generator to move from the starting position to the designated shooting position is calculated based on the motion speed.

3. The method according to claim 1, characterized in that, The determination of the movement time required for the generator to move to the designated shooting position corresponding to the shooting command includes: Whenever the position information of the generator is detected, the current movement speed of the generator is calculated based on the current position information of the generator and the specified shooting position corresponding to the shooting command; Based on the current motion speed, the motion time required for the generator to move to the designated shooting position is recalculated.

4. The method according to claim 1, characterized in that, After controlling the generator to emit rays to the flat panel detector assembly for exposure, the method further includes: Based on the shutdown signal from the generator, the flat panel detector assembly is controlled to close its window.

5. The method according to claim 1, characterized in that, The monitoring of the generator's location information includes: The location information reported by the generator is received once every preset time period.

6. The method according to claim 1, characterized in that, The rotating head assembly further includes: an arc-shaped guide rail, the center of which is the center of the flat panel detector assembly; the arc-shaped guide rail has a grooved track for the generator to slide; and at least one position sensor is installed on the arc-shaped guide rail. The control of the camera head rotation assembly to move the generator toward the designated shooting position corresponding to the shooting command, and the monitoring of the generator's position information, includes: The camera head rotation assembly is controlled to cause the generator to move along the arc-shaped guide rail toward the designated shooting position corresponding to the shooting command; The position data reported by the position sensor is received at a preset frequency, and the position information of the generator is determined based on the signal data.

7. The method according to claim 1, characterized in that, The method further includes: The operating status of the generator, the head rotation assembly, and the flat panel detector assembly is monitored. When an abnormality is detected in the operating status of the generator and / or the head rotation assembly and / or the flat panel detector assembly, the operation of the digital photography equipment is interrupted, and a preset abnormality prompt message is issued. The abnormal operating status data is stored.

8. An exposure control device, characterized in that, An application is made in digital photography equipment, the digital photography equipment comprising: a flat panel detector assembly, a head rotation assembly, a generator, and a C-arm; the flat panel detector assembly and the head rotation assembly are respectively mounted at both ends of the C-arm; the generator is connected to the head rotation assembly and faces the flat panel detector assembly, the generator being movable on the head rotation assembly to adjust the launch position and launch angle; the device includes: A position monitoring module is used to control the camera head rotation assembly to move the generator toward the specified shooting position corresponding to the shooting command in response to a received shooting command, and to monitor the position information of the generator. The shooting command is used to instruct the digital photography device to capture images at the angle and in the number of images. The tablet control module is used to set the timer duration for the tablet detector component based on the shooting command, and to control the tablet detector component to open a window after the timer duration expires; The generator control module is used to control the generator to emit rays to the flat panel detector assembly for exposure when it is detected that the generator has reached the designated shooting position, so that the digital photography device can capture the target image corresponding to the shooting command under exposure. The tablet control module is also used to determine the movement time required for the generator to move to the designated shooting position corresponding to the shooting command, and to determine the timing duration of the timer of the tablet detector component based on the movement time, so that the tablet detector component has opened the window when the generator moves to the designated shooting position; The flat panel control module is also used to calculate the delay time generated by the digital photography equipment in terms of mechanical structure based on the mechanical structure influence parameters of the digital photography equipment, and determine the timing duration of the timer of the flat panel detector assembly by combining the window opening preparation time of the flat panel detector assembly and the movement time.

9. A digital photography device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method as described in any one of claims 1 to 7; The digital photography equipment includes: a flat panel detector assembly, a head rotation assembly, a generator, and a C-arm; the flat panel detector assembly and the head rotation assembly are respectively mounted at both ends of the C-arm; the generator is connected to the head rotation assembly and is opposite to the flat panel detector assembly, and the generator can move on the head rotation assembly to adjust the launch position and launch angle.

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