High-power short-pulse radiation source phase control synchronization system and method

Abstract

The invention relates to a high-power short-pulse ray source phase control synchronization system and method, relates to the technical field of X-ray detection, and solves the technical problems of motion blur, insufficient ray power and inaccurate synchronization control caused by continuous exposure in the prior art. The system comprises an upper computer, a phase control time sequence unit, a motion machine, a pulse X-ray source, a digital flat panel detector, an image processing module and an image output module. According to the high-power short-pulse radiation source phase control synchronization system and method disclosed by the invention, non-fuzzy and high-resolution online detection of a thick-wall large piece on a high-speed assembly line is realized for the first time. Through time, pulse and image quality three-closed-loop control, the detection precision and stability are remarkably improved, and a system-level solution capable of being popularized is provided for modern industrial nondestructive detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of X-ray detection technology, in particular to a high-power short pulse ray source phased synchronization system and method. BACKGROUND

[0002] With the rapid development of the automotive, aerospace, nuclear power and energy equipment industries, the production of large-size integrated castings (such as engine cylinder blocks, aerospace casings, nuclear power valve bodies, etc.) on high-speed assembly lines requires high-resolution, high-contrast, real-time non-destructive testing. The internal structure of such products is complex, and any internal defects (such as pores, shrinkage, slag inclusion, cracks, etc.) can cause product failure and even major accidents.

[0003] Digital radiography (DR) is a modern industrial non-destructive testing (NDT) and medical imaging technology that uses X-rays to penetrate objects and convert the X-ray signal directly into a digital image through a digital detector, achieving real-time imaging of the internal structure of the object being tested.

[0004] The most similar implementation scheme in the prior art to the present application includes: Chinese patent document with application number 202211597099.9 discloses a phase synchronization circuit, an optical fiber vibration monitoring device and a phase synchronization method; Chinese patent document with application number 202210874885.2 discloses a phase synchronization circuit and a phase synchronization method; Chinese patent document with application number 201880081191.5 discloses a phase synchronization device; The methods disclosed in the above Chinese patent documents all determine the phase difference between the clock reference source frequency and the local clock source frequency through a phase module, and perform precision detection on the phase difference to achieve synchronization control of each component.

[0005] In summary, the shortcomings of the prior art include: 1. Continuous exposure causes motion blur; 2. Insufficient ray power, low contrast for thick-walled parts; 3. Inaccurate synchronization control, image drift, and image artifacts. SUMMARY

[0006] The present application solves the technical problems of continuous exposure causing motion blur, insufficient ray power and inaccurate synchronization control in the prior art phased synchronization method, and provides a high-power short pulse ray source phased synchronization system and method.

[0007] To solve the above technical problems, the technical solution of the present application is as follows: A phased synchronous system of a high-power short pulse ray source, comprising: a host computer, a phased timing unit, a moving machine, a pulse X-ray source, a digital flat panel detector, an image processing module and an image output module; The host computer is connected with the phased timing unit, and the phased timing unit is connected with the moving machine, the pulse X-ray source and the digital flat panel detector respectively; the moving machine, the pulse X-ray source, the digital flat panel detector, the image processing module and the image output module are connected in sequence; The host computer is used to issue detection tasks and parameters and receive detection results; The phased timing unit is used to uniformly schedule the moving machine, the pulse X-ray source and the digital flat panel detector; The moving machine is used to complete positioning and micro-stopping of a workpiece; The pulse X-ray source is used to emit a short pulse ray during a window triggered by the digital flat panel detector; The digital flat panel detector is used to collect and digitize a transmission signal and output the transmission signal to the image processing module; The image processing module is used to form a detection result after noise suppression, contrast enhancement and defect identification; The image output module is used to display or store the detection result, and realize online nondestructive detection of the workpiece.

[0008] In the above technical solution, the moving machine, the pulse X-ray source and the digital flat panel detector are also used to receive a moving point position control signal, a pulse trigger signal and an external trigger signal respectively; The phased timing unit is used to input the moving point position control signal, the pulse trigger signal and the external trigger signal as detection beat reference inputs, and uniformly schedule the moving machine, the pulse X-ray source and the digital flat panel detector respectively, so as to realize strict synchronization of movement, emission and detection.

[0009] A phased synchronous method of a high-power short pulse ray source, which is applicable to the system described above, comprising the following steps: S1: A workpiece enters a moving machine to a positioning point, reads an encoder displacement and a speed, and predicts a trigger threshold; S2: The phased timing unit delays a certain time input; S3: An external trigger signal is calculated; S4: A short pulse exposure is triggered in a middle section of a window N A sub-short pulse, N is an integer; S5: The moving machine controls micro-stopping in a key area and passes through a conventional area at a constant speed; S6: An image processing output defect positioning is archived.

[0010] In the technical solution, the step S6 is specifically: the image output by the digital flat panel detector is subjected to defect recognition and positioning by the image processing module, and finally the detection result is output.

[0011] The present application has the following advantages: The high-power short-pulse ray source phased synchronization system and method realize the non-blurring and high-resolution online detection of thick-walled large pieces on a high-speed pipeline for the first time. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present application will be further described in detail below with reference to the drawings and specific embodiments.

[0013] Figure 1 is a structural schematic diagram of the high-power short-pulse ray source phased synchronization system of the present application.

[0014] Figure 2 is a flowchart of the high-power short-pulse ray source phased synchronization method of the present application.

[0015] Figure 3 is a timing phase schematic diagram of the high-power short-pulse ray source phased synchronization method of the present application.

[0016] The reference signs in the drawings are represented as: 10 - host computer; 20 - phased timing unit; 30 - motion machine; 40 - pulse X-ray source; 50 - digital flat panel detector; 60 - image processing module; 70 - image output module; 301 - motion point position control signal; 401 - pulse trigger signal; 501 - external trigger signal. DETAILED DESCRIPTION

[0017] The present application has the following advantages: The high-power short-pulse ray source phased synchronization system of the present application combines a high-frequency short-pulse X-ray source and a phased digital detection array to realize rapid imaging of large-size castings without multiple exposures, and through high-frequency short-pulse output and nanosecond-level synchronization control, realizes: high-penetration imaging of thick-walled large pieces; elimination of motion blur under high-speed conveying conditions; high-resolution, large-field-of-view real-time online detection; support for 1-2 seconds / piece production line rhythm, and realization of 100% full inspection.

[0018] This invention relates to a high-power short-pulse X-ray source phase-controlled synchronization method, designed for online non-destructive testing of large-size integrated castings. The aim is to obtain high-resolution DR images without motion blur at a cycle time of 1–2 s / piece. The core idea is to use a unified master clock as a reference and perform nanosecond-level phase synchronization of the short-pulse X-ray source, the external input signal of the digital flat panel detector (hereinafter referred to as electronic windowing), and motion / micro-pause through a phase-controlled timing unit.

[0019] The present invention will now be described in detail with reference to the accompanying drawings.

[0020] The high-power short-pulse X-ray source phased synchronization system of the present invention, such as Figure 1 As shown, it includes: a host computer 10, a phased-array timing unit 20, a motion mechanism 30, a pulsed X-ray source 40, a digital flat panel detector 50, an image processing module 60, and an image output module 70; the host computer 10 is connected to the phased-array timing unit 20, and the phased-array timing unit 20 is connected to the motion mechanism 30, the pulsed X-ray source 40, and the digital flat panel detector 50 respectively; the motion mechanism 30, the pulsed X-ray source 40, the digital flat panel detector 50, the image processing module 60, and the image output module 70 are connected in sequence; the motion mechanism 30, the pulsed X-ray source 40, and the digital flat panel detector 50 are used to receive the motion point control signal 301, the pulse trigger signal 401, and the external trigger signal 501, respectively.

[0021] The host computer 10 is responsible for issuing detection tasks and parameters and receiving detection results. The phased-synchronous timing unit 20 uses the motion point control signal 301, pulse trigger signal 401 and external trigger signal 501 as the detection cycle reference input. The phased-synchronous timing unit 20 uniformly schedules the motion machine 30, the pulsed X-ray source 40 and the digital flat panel detector 50 to achieve strict synchronization of motion, emission and detection. The motion machine 30 completes the positioning and micro-pause of the workpiece accordingly. The pulsed X-ray source 40 emits short pulse rays during the window opening triggered by the digital flat panel detector 50. The digital flat panel detector 50 collects the transmission signal and outputs it digitally to the image processing module 60. After noise suppression, contrast enhancement and defect identification, the detection result is formed and finally displayed or stored by the image output module 70, thereby realizing efficient, accurate and online non-destructive testing of the workpiece (large-size integrated casting).

[0022] The high-power short-pulse X-ray source phased synchronization method of the present invention is as follows: Figure 2 As shown, it includes the following steps: S1: The workpiece moves to the positioning point, and the encoder displacement is read. and speed Predicting trigger threshold T enc ; S2: Phased timing unit 20 delay Δt 1 input; S3: Calculate the external trigger signal 501 (electronic window opening); S4: Short pulse exposure triggered in the middle of the window opening. N Short pulse; S5: The motion machine 30 is controlled to slightly stop in the critical area and pass through the normal area at a constant speed; S6: Image processing output defect location archiving.

[0023] Specifically: After the workpiece enters the detection position, the system reads the encoder displacement. With speed Information and predict trigger thresholds T enc threshold T enc The delay compensation Δ is 0.3–2s (S1); the phase control timing unit 20 has a delay compensation Δ t 1 (S2) after (delay compensation Δ) t The value range is 0.8–8 ms), and the output electronic windowing signal controls the digital flat panel detector to integrate 50 units (S3), which then triggers the pulsed X-ray source 40 to emit in the middle of the windowing. N The exposure is completed by a short pulse (S4), while the moving mechanism 30 briefly pauses in the critical area and quickly passes through the regular area (S5). The image output by the digital flat panel detector 50 is processed by the image processing module 60 to identify and locate defects, and finally the detection result is output (S6), realizing efficient and accurate non-destructive testing of internal defects in large-sized castings. N It is an integer.

[0024] The timing phase diagram of the high-power short-pulse X-ray source phased synchronization system of the present invention is as follows: Figure 3 The diagram illustrates the temporal logic relationship between the encoder trigger signal, the digital flat panel detector 50 window opening signal, the pulse emission signal, and the motion micro-pause signal. Throughout the entire detection cycle, each signal maintains a strictly fixed phase difference to ensure time synchronization between light source emission, detection integration, and motion control. When the workpiece moves to the detection position, the encoder monitors its displacement and velocity in real time, and triggers a response when a preset threshold is reached. T enc A trigger signal is then output. This signal is input to the phase control timing unit 20, and the system switches from asynchronous waiting state to synchronous control state. At this time, according to the preset compensation parameter Δ t 1. Simultaneously outputs the window opening and X-ray pulse emission commands for the digital flat panel detector 50. The digital flat panel detector 50, after triggering, advances the output by Δ... t1. The electronic integration window is opened to ensure stable acquisition before the pulse arrives. During the window opening period of the digital flat panel detector 50, the phase-controlled timing unit 20 outputs a high-voltage pulse trigger signal, driving the pulsed X-ray source 40 to emit multiple short pulses with pulse intervals... T P Delay compensation Δ t 2. The pulse sequence time satisfies T pulse ,n= T enc +Δ t 2+( n -1) T p All pulses are located in the middle of the 50-degree window of the digital flat panel detector, satisfying the window duration requirement. During the exposure phase, the motion mechanism 30 enters a micro-pause state, maintaining this state for a duration of [duration missing]. T s This is used to suppress motion blur caused by high-speed scanning. The micro-dwelling time needs to meet certain requirements. Δ t 3 represents the mechanical settling time. After the micro-pause ends, the system resumes normal conveying speed, completing one testing cycle.

[0025] Where n represents the sequence number of the nth short pulse, T p Indicates pulse interval, Indicates the effective radiation duration of a single short pulse; hold time. T s The value range is 50–200 ms; pulse interval T P The value range is 5–20 ms; delay compensation Δ t The value of 2 ranges from 1 to 10 ms; the mechanical settling time Δ t The value of 3 ranges from 20 to 50 ms; the value of n ranges from 5 to 20. The value range is 0.2–2.0 ms.

[0026] Figure 3 The timing relationship of each signal is as follows: the encoder signal reaches the threshold to trigger synchronization; synchronization is entered; the detector opens the window in advance; the pulse signal is triggered multiple times in the middle of the window; the motion mechanism 30 performs a short pause during the exposure period; all signals are reset after the cycle ends. This invention, through this timing and phase matching design, achieves synchronous control of the pulsed X-ray source 40, the digital flat panel detector 50, and the motion mechanism 30, significantly improving the resolution, exposure stability, and inspection cycle efficiency of online inspection of large-size castings.

[0027] The high-power short-pulse X-ray source phased-array synchronization system and method of this invention achieves, for the first time, unambiguous, high-resolution online inspection of thick-walled large components on a high-speed production line. Through three closed-loop controls of time, pulse, and image quality, the detection accuracy and stability are significantly improved, providing a widely applicable system-level solution for modern industrial non-destructive testing.

[0028] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A phased synchronization system for a high power short pulse radiation source, characterized in that, The system comprises: a host computer (10), a phased timing unit (20), a motion mechanism (30), a pulsed X-ray source (40), a digital flat panel detector (50), an image processing module (60), and an image output module (70); the host computer (10) is connected with the phased timing unit (20), the phased timing unit (20) is connected with the motion mechanism (30), the pulsed X-ray source (40), and the digital flat panel detector (50) respectively; and the motion mechanism (30), the pulsed X-ray source (40), the digital flat panel detector (50), the image processing module (60), and the image output module (70) are connected in sequence; the host computer (10) is used to issue a detection task and parameters and receive a detection result; the phased timing unit (20) is used to uniformly schedule the motion mechanism (30), the pulsed X-ray source (40), and the digital flat panel detector (50); the motion mechanism (30) is used to complete positioning and micro-holding of a workpiece; the pulsed X-ray source (40) is used to emit a short pulse of X-ray during a window triggered by the digital flat panel detector (50); the digital flat panel detector (50) is used to collect and digitize a transmission signal and output the transmission signal to the image processing module (60); the image processing module (60) is used to form a detection result after noise suppression, contrast enhancement, and defect identification; the image output module (70) is used to display or store the detection result, and realize online nondestructive detection of the workpiece.

2. The phased synchronization system of the high-power short pulse X-ray source according to claim 1, wherein the motion mechanism (30), the pulsed X-ray source (40), and the digital flat panel detector (50) are further used to receive a motion point position control signal (301), a pulse trigger signal (401), and an external trigger signal (501) respectively; the phased timing unit (20) is used to input the motion point position control signal (301), the pulse trigger signal (401), and the external trigger signal (501) as a detection beat reference respectively, and uniformly schedule the motion mechanism (30), the pulsed X-ray source (40), and the digital flat panel detector (50) respectively, so as to realize strict synchronization of motion, emission, and detection.

3. A phased synchronization method for a high power short pulse radiation source, applicable to the system of claim 1, characterized in that, The method comprises the following steps: S1: a workpiece is moved to a positioning point, an encoder displacement and a speed are read, and a trigger threshold is predicted; S2: the phased timing unit (20) is inputted with a delay for a certain time; S3: an external trigger signal (501) is calculated; S4: short pulse exposure triggered in middle of window N sub-short pulse, N is an integer; S5: the motion mechanism (30) is controlled to micro-hold in a key area and pass through a conventional area at a constant speed; S6: an image output by the digital flat panel detector (50) is subjected to defect identification and positioning by the image processing module (60), and finally a detection result is outputted.

4. The phased synchronization method of a high-power short-pulse radiation source according to claim 3, characterized in that, Step S6 is specifically that the image output by the digital flat panel detector (50) is subjected to defect identification and positioning by the image processing module (60), and finally a detection result is outputted.

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