Endoscope detection method and system based on pulse light supplement

Abstract

The invention discloses an endoscope detection method and system based on pulse light supplement, and belongs to the field of industrial nondestructive detection. The method comprises the steps that low-power continuous illumination is adopted during conventional scanning; when a suspected defect area is found, switching to a photographing mode, controlling the illumination light power supply to emit high-intensity pulsed light, and synchronously controlling the image sensing camera device to expose, so as to obtain a high-brightness and high-definition image of the key area for quantitative evaluation; and then normal illumination is recovered. The system comprises a probe, a driving control module and a central control module. The flash lamp type pulse light supplement is implemented at the moment of key detection, so that the inherent contradiction between serious heating and equipment reliability reduction caused by pursuit of imaging brightness of a micro endoscope is fundamentally solved, the service life of equipment is greatly prolonged while the measurement precision is ensured, and the cost is reduced. The method is especially suitable for internal detection of high-end precision equipment such as aero-engines.

Description

An Endoscopic Inspection Method and System Based on Pulse Complementary Illumination Technical Field

[0001] This invention relates to the field of industrial nondestructive testing technology, specifically to an illumination and imaging method and system for an endoscope used for detecting defects inside high-temperature, sealed, and confined spaces such as aero-engines. Background Technology

[0002] Industrial endoscopes, especially miniature endoscopes used for internal inspection of aero-engines, operate in harsh environments with strict space constraints. To obtain clear internal images, an illumination power source (such as an LED) and an image sensing camera must typically be integrated within a probe with a diameter of only 4mm or even smaller. Current technologies generally employ continuous LED illumination, which leads to two contradictory problems: 1. Insufficient brightness and blurry images: Limited by probe size and LED power, continuous illumination brightness is limited, especially when inspecting dark surfaces (such as carbon-deposited blades) or minute defects (such as microcracks and dents). This results in low signal-to-noise ratios and blurred details, severely impacting the accuracy of subsequent visual observation and quantitative measurements. 2. Severe heat generation and equipment reliability: Increasing the LED drive current to improve brightness leads to severe heat accumulation in the LED and adjacent CMOS / CCD image sensing camera. Heat dissipation is extremely difficult in the confined, enclosed probe head; prolonged high-temperature operation accelerates LED decay, damages the image sensing camera, and reduces overall reliability and lifespan. Currently, the industry mainly alleviates the contradiction by optimizing the heat dissipation structure and adopting more efficient LEDs or fiber optic light guides, but none of these methods fundamentally solve the physical conflict between "high brightness requirements" and "limited heat dissipation capacity." Therefore, an innovative lighting control method is needed to effectively control the endoscopic illumination and imaging method and system for detecting internal defects in the endoscopic lens while ensuring image quality in critical areas.

[0003] To address the above-mentioned shortcomings, the present invention adopts the following technical solution. Summary of the Invention

[0004] The purpose of this invention is to provide an endoscopic inspection method and system based on pulsed illumination. Through intelligent pulse driving and image acquisition coordinated control, it provides instantaneous high-brightness illumination when high-precision observation or measurement of key areas is required, thereby significantly improving the image quality of the target area while avoiding overheating problems caused by continuous high-power operation of the light source. The disclosed technical solution is as follows: Firstly, this invention provides an endoscopic inspection method based on pulsed illumination for in-service maintenance defect detection of the object (1) inside a high-temperature, sealed, and narrow space such as an aero-engine device, including the following steps: Step S1: Under normal conditions... In the standard detection phase, the illumination power supply of the endoscope is controlled to provide continuous illumination at a first power level; Step S2: The target area to be finely detected is identified; Step S3: In response to the fine detection command for the target area, the system switches to the imaging mode; Step S4: In the imaging mode, the illumination power supply is controlled to emit at least one pulse of light at a second power level, and the image sensing camera is controlled to expose during the duration of the pulse of light to acquire a high-brightness image of the target area; wherein, the second power level is higher than the first power level; Step S5: Analysis or measurement is performed based on the high-brightness image. In step S4, the pulse width of the pulse of light is less than or equal to the exposure time of one frame of the image sensing camera. Further, the target area is located using a binocular vision method. The target area is determined by manual annotation by the operator or automatic identification by an image recognition algorithm. The determination of the target area includes the positioning direction, distance, and area range of the target area to be finely detected. Further, it also includes adjusting the pulse of light through three-dimensional stereo measurement using binocular vision.

[0005] Furthermore, the binocular vision method uses two calibrated camera units to perform at least two positioning scans on the three-dimensional object to be inspected, outputting two or more sets of three-dimensional spatial coordinate data. After determining the target area, the positioning direction, distance, and area range of the pulse light are adjusted. Further, it also includes comparing the target area finely detected in step S2 with the image analysis or measurement values ​​in step S5, and adjusting the pulse light and its parameters or frequency in step S4 according to the imaging mode in step S3.

[0006] It may also include a thermal management step: monitoring the temperature of the endoscope head and adjusting the parameters or frequency of the pulsed light based on the monitored temperature.

[0007] Secondly, the present invention also provides an endoscope detection system based on pulsed illumination for implementing the above method, comprising: an endoscope probe detection module, a drive control module, and a central control module. The endoscope probe detection module integrates an image sensing camera and an illumination source. The drive control module is connected to the illumination power supply and the pulsed light power supply, and is used to drive the illumination power supply to switch between continuous illumination mode and pulsed illumination mode. The central control module includes a target area identification module for controlling the drive control module to issue pulsed drive signals, and a fine detection command module for synchronously controlling the image sensing camera to perform exposure in response to the identified target area. Further, the central control module also includes a binocular vision positioning module for identifying the target area. The target area may include the directional positioning, distance, and area range of the target area requiring fine detection. Further, the central control module also includes an image analysis or measurement module for analyzing the detection results, and after comparing and analyzing the detection results and various parameters of the identified target area by the central control module, readjusting the illumination power supply to pulsed light to determine the target area. The various parameters of the identified target area include, but are not limited to, directional positioning, distance, and area range.

[0008] Furthermore, the lighting source is an LED array light source, and the driving control module also includes a constant current driving circuit module and a pulse modulation circuit module.

[0009] It may also include a temperature sensing camera device disposed on the head of the endoscope probe, the temperature sensing camera device being connected to the central control module for displaying and adjusting the temperature of the endoscope probe.

[0010] Thirdly, the present invention also discloses an endoscope with a pulsed illumination device. An endoscope with a pulsed illumination device is used in the endoscope of the above methods or systems. It is suitable for non-destructive testing of the object (1) in the narrow space of precision devices such as aircraft engines. The endoscope (2) includes a mounting plate (4), a probe (3) including a detection sensing camera device (31), and an illumination source (32).

[0011] Furthermore, the endoscope with the pulse illumination device also has an illumination device (33) for adjusting the pulse light direction range after multiple binocular stereoscopic positioning of the object to be detected. The illumination source (32) is set as an LED array illumination source, and the illumination device (33) includes an angle fine-tuning component consisting of one or more micro servo motors, which respectively control the adjustment of the horizontal pitch axis, vertical yaw axis, and forward roll axis of the LED array illumination source.

[0012] Based on the above technical solution, the present invention has the following beneficial effects, and compared with the prior art, the present invention has the following significant advantages: 1. Revolutionary improvement in image quality: By providing high-intensity pulse illumination in the form of a "flashlight" at critical detection moments, the image brightness, contrast, and detail resolution of the target area are greatly improved, providing a high-quality image foundation for subsequent quantitative crack measurement, pit depth analysis, etc., directly improving the accuracy and reliability of detection. 2. Fundamentally solving the heat generation problem: The light source operates in a low-power continuous illumination or off state most of the time, only "bursting" into high brightness momentarily when needed. Due to the extremely short pulse working time, the average power and the heat generated are far lower than continuous illumination at the same brightness level, thus completely avoiding overheating of the probe head caused by pursuing high brightness, significantly improving the service life of LEDs and image sensing cameras and the stability of the system. 3. Intelligence and energy saving: The method realizes "on-demand illumination," accurately delivering precious electrical and light energy to the parts that require fine analysis, avoiding the energy waste caused by continuous high brightness throughout the entire area, which is in line with the concept of green detection. 4. High accuracy of illumination parameter correction during detection: When the target area includes a target area that requires fine detection, the detection result image is compared and corrected with the identified target area again. After comparing the differences in the size of the comparison range, the direction, distance, and area of ​​the pulse light are adjusted to obtain the detection result again, so as to ensure the accuracy of the detection result image by making the pulse light accurately positioned. Attached Figure Description

[0013] Figure 1 is a flowchart of the method according to an embodiment of the present invention; Figure 2 is a schematic diagram of the system module composition according to an embodiment of the present invention; Figure 3 is a schematic diagram of the endoscope detection structure according to the first embodiment of the present invention; Figure 4 is a schematic diagram of the endoscope probe structure according to the first embodiment of the present invention; Figure 5 is a schematic diagram of the endoscope probe structure according to the first embodiment of the present invention; Figure 6 is a schematic diagram of adjusting the light source of the endoscope probe according to the first embodiment of the present invention; Figure 7 is a schematic diagram of the endoscope probe structure according to the second embodiment of the present invention; Figure 8 is a schematic diagram of the endoscope probe structure according to the second embodiment of the present invention; Figure 9 is a schematic diagram of the endoscope detection structure according to the second embodiment of the present invention; Figure 10 is a schematic diagram of adjusting the light source of the endoscope probe according to the second embodiment of the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The following examples are for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention.

[0015] Example 1: Referring to Figures 1-6, a pulsed illumination method and system device for an endoscope used for in-service inspection of turbine blades of an aero-engine.

[0016] As shown in Figures 3 to 6, an endoscope with a pulse illumination device is suitable for non-destructive testing of an object 1 within a narrow space, such as an aircraft engine, in precision components. The endoscope 2 includes a mounting plate 4, a probe 3 including a detection sensor camera 31, and an illumination source 32. Optimized, the endoscope with the pulse illumination device also includes an illumination device 33, used to adjust the direction range of the pulse light after positioning the object, as shown in Figures 4 and 5. The illumination source 32 is set as an LED array illumination source, and the LED array is not limited to four or eight. The illumination device 33 includes an angle fine-tuning component consisting of one or more miniature servo motors, which respectively control the adjustment of the horizontal pitch axis, vertical yaw axis, and forward roll axis of the LED array illumination source.

[0017] As shown in Figure 2, the pulsed illumination endoscopic detection system includes an endoscope probe detection module, which integrates an image sensing camera and an illumination source; a drive control module, connected to the illumination power supply and the pulsed light power supply, used to drive the illumination power supply to switch between continuous illumination mode and pulsed illumination mode; and a central control module, including a target area identification module for controlling the drive control module to issue pulse drive signals, and a fine detection command module for synchronously controlling the image sensing camera to perform exposure in response to the identified target area. The illumination source is an LED array light source, and the drive control module also includes a constant current drive circuit module and a pulse modulation circuit module. It may also include a temperature sensing camera located on the endoscope probe head, connected to the central control module, used to display and adjust the endoscope probe temperature.

[0018] The steps of the pulsed illumination method for endoscopy are as follows: In step S1, during the routine inspection stage, the endoscope 2, carried by the flexible mounting sheet 4, uses an endoscope probe 3 with a diameter of 4mm to perform a routine scanning inspection of the object 1. The head of the endoscope probe 3 integrates 200... A 10-megapixel CMOS sensor camera serves as the sensor camera 31, and a ring of high-efficiency white LEDs acts as the illumination source 32. The central control module controls the endoscope's illumination power supply 32 to provide continuous illumination at a first power level. In step S2, the central control module identifies the target area to be finely inspected and locks parameters including the target area's orientation, distance, and range. In step S3, in response to the fine inspection command for the target area, and referring to the parameters, the sensor camera 31 switches to the image capture mode. In step S4, in the image capture mode, the illumination source 32 is controlled to emit at least one pulse of light at a second power level, and the image sensor camera is controlled to expose during the duration of the pulse of light to acquire a high-brightness image of the target area. Compared with the illumination light in step S1, the second power level is higher than the first power level. The drive control module uses a MOSFET-based switching constant current circuit and can output two drive signals under the command of the central control module (embedded MCU): one is 80mA. The system uses two types of lighting: a continuous current for the first power level illumination source during routine scanning and a rectangular pulse current of 500mA with a pulse width of 1 / 1000 second for the second power level pulse supplementary lighting source. In step S5, the measurement results are analyzed based on the high-brightness image captured in step S4. Specifically, in step S4, the pulse width of the supplementary lighting pulse is less than or equal to the exposure time of one frame of the image sensing camera device.

[0019] During routine scanning, a suspected crack was detected at the base of a leaf via video stream. A command was sent to the endoscope's central control module to perform a detailed inspection of this area. Upon receiving the command, the central control module immediately executed the following: 1) Sending a pulse trigger signal to the drive control module; 2) Sending a global exposure trigger signal to the two CMOS sensor cameras, setting the exposure time to 1 / 1000 of a second. During the exposure, the LED illuminates instantaneously, emitting high-intensity light. The sensor cameras, composed of CMOS sensors, simultaneously capture a sufficiently bright and detailed image of the crack. The image processing module enhances and stitches the image, and then uses measurement software to automatically calculate the length and width of the crack as the detection result. After one pulse image capture, the system automatically returns to the normal illumination scanning mode. The heat generated during the entire pulse process is negligible, and the temperature rise of the probe head is negligible. In the optimized detection method, the central control module of the endoscope further compares the image analysis or measurement results of step S5 with the parameter values ​​of the target area detected in step S2, repeats the imaging mode of step S3, and adjusts the pulse light parameters or frequency in step S4 for repositioning. As shown in Figure 6, in response to the fine detection command for the target area, the central control module controls the image sensing camera to expose during the duration of the pulse light. While the supplementary lighting device 33 adjusts the illumination source 32 to the second power level, the pulse light range of the LED light source is D1. After the central control module acquires a high-brightness image of the target area, it makes a second adjustment. The supplementary lighting device then adjusts the pulse light range of the LED array light source to D2, and then to D3.

[0020] Furthermore, the endoscope may also include a thermal management step: monitoring the temperature of the endoscope head and adjusting the parameters or frequency of the pulsed light based on the monitored temperature. The addition of a miniature temperature monitoring module integrated with the pulsed light source power supply solves the problems of low positioning accuracy, poor adaptability, and overheating of the head caused by pulsed light irradiation in traditional endoscope examinations, thus balancing examination accuracy and equipment safety.

[0021] Example 2: Referring to Figures 1, 2 and 7 to 10, a pulse illumination method and system for an endoscope used for in-service inspection of turbine blades of aero-engines is shown. The difference from Example 1 is that the sensing camera device is a binocular sensing camera device used for binocular visual positioning. As shown in Figures 7 to 10, the endoscope with a pulse illumination device is suitable for non-destructive testing of the object 1 in the narrow space of precision components such as aero-engines. The endoscope 2 includes a mounting plate 4, and the probe 3 includes a detection sensing camera device 31 and an illumination source 32. The optimized endoscope with a pulse illumination device also has an illumination device 33, which is used to adjust the direction range of the pulse light after multiple binocular visual stereo positioning of the object being inspected. The illumination source 32 is set as an LED array illumination source. The illumination device 33 includes an angle fine-tuning component consisting of one or more micro servo motors, which respectively control the adjustment of the horizontal pitch axis, vertical yaw axis, and forward roll axis of the LED array illumination source. The image sensing camera used by the binocular visual positioning module is a binocular CMOS sensor camera. The control module automatically triggers the angle fine-tuning.

[0022] As shown in Figure 2, the pulsed illumination endoscopic detection system includes an endoscope probe detection module, which integrates an image sensing camera and an illumination source; a drive control module, connected to the illumination power supply and the pulsed light power supply, used to drive the illumination power supply to switch between continuous illumination mode and pulsed illumination mode; and a central control module, including a target area identification module for controlling the drive control module to issue pulse drive signals, and a fine detection command module for synchronously controlling the image sensing camera to perform exposure in response to the identified target area. The illumination source is an LED array light source, and the drive control module also includes a constant current drive circuit module and a pulse modulation circuit module. It may also include a temperature sensing camera located on the endoscope probe head, connected to the central control module, used to display and adjust the endoscope probe temperature.

[0023] The optimized central control module also includes a binocular vision positioning module for identifying the target area. The target area can include the direction, distance, and extent of the area requiring precise detection. Furthermore, the central control module includes an image analysis or measurement module for analyzing the detection results. After comparing the detection results with the parameters of the identified target area, the central control module readjusts the illumination power supply to provide pulsed light for determining the target area. The parameters for identifying the target area include, but are not limited to, direction, distance, and extent.

[0024] The steps of the pulsed illumination method for endoscopy are as follows: In step S1, during the routine inspection phase, the endoscope 2, carried by the flexible mounting plate 4, uses a 4mm diameter endoscope probe 3 to perform a routine scanning inspection of the object 1. The head of the endoscope probe 3 integrates two 200mm... A 10-megapixel CMOS sensor camera device serves as the sensor camera device 31 (for binocular stereo vision) and a ring of high-efficiency white LEDs as the illumination source 32. The central control module controls the endoscope's illumination power supply 32 to provide continuous illumination at a first power level. In step S2, the central control module identifies the target area to be finely inspected and locks parameters including the target area's orientation, distance, and area range. In step S3, in response to the fine inspection command for the target area, and referring to the parameters, the sensor camera device 31 switches to the image capture mode. In step S4, in the image capture mode, the illumination source 32 is controlled to emit at least one pulse of light at a second power level, and the image sensor camera device is controlled to expose during the duration of the pulse of light to acquire a high-brightness image of the target area. Compared with the illumination light in step S1, the second power level is higher than the first power level. The drive control module uses a MOSFET-based switching constant current circuit and can output two drive signals under the command of the central control module (embedded MCU): one is 80mA. The system uses two types of lighting: a continuous current for the first power level illumination source during routine scanning and a rectangular pulse current of 500mA with a pulse width of 1 / 1000 second for the second power level pulse supplementary lighting source. In step S5, the measurement results are analyzed based on the high-brightness image captured in step S4. Specifically, in step S4, the pulse width of the supplementary lighting pulse is less than or equal to the exposure time of one frame of the image sensing camera device.

[0025] During routine scanning, a suspected crack was detected at the base of a leaf via video stream. A command was sent to the endoscope's central control module to perform a detailed inspection of this area. Upon receiving the command, the central control module immediately executed the following: 1) sending a pulse trigger signal to the drive control module; 2) sending a global exposure trigger signal to the two CMOS sensor cameras, setting the exposure time to 1 / 1000 second. During the exposure, the LED illuminated instantaneously, emitting high-intensity light. The sensor cameras, composed of CMOS sensors, simultaneously captured a sufficiently bright and detailed image of the crack. The image processing module enhanced and stitched the image together with the binocular vision images, then used measurement software to automatically calculate the length and width of the crack as the detection result. After one pulse image capture, the system automatically returned to the normal illumination scanning mode. The heat generated during the entire pulse process was negligible, and the temperature rise of the probe head was negligible. Furthermore, the target area was located using a binocular vision method. The target area was determined by manual operator marking or automatic identification using image recognition algorithms. The determination of the target area included the location direction, distance, and area range of the target area requiring detailed inspection. Furthermore, it also includes tracking and adjusting pulsed light through three-dimensional stereoscopic measurement using binocular vision.

[0026] Furthermore, the binocular vision method uses two calibrated camera units to perform at least two positioning scans on the three-dimensional object to be inspected, outputting two or more sets of three-dimensional spatial coordinate data. After determining the target area, the positioning direction, distance, and area range of the pulse light are adjusted. In the optimized detection method, the endoscope's central control module further compares the image analysis or measurement results of step S5 with the target area parameter values ​​of step S2 for fine detection, repeats the above step S3's imaging mode, adjusts the pulse light parameters or frequency in step S4, and adjusts the pulse light source for the positioning direction, distance, and area range required for fine detection of the repositioned target area. As shown in Figure 10, the endoscope with a pulse illumination device also has an illumination device 33, used to adjust the direction range of the pulse light after multiple binocular visual stereoscopic positioning of the object being inspected. The illumination source 32 is set as an LED array illumination source. The illumination device 33 includes an angle fine-tuning component consisting of one or more miniature servo motors, which respectively control the adjustment of the horizontal pitch axis, vertical yaw axis, and forward roll axis of the LED array illumination source. The image sensing camera used in the binocular visual positioning module is a binocular CMOS sensor. The sensing camera device and control module automatically trigger angle fine-tuning. The central control module responds to the fine detection command for the target area and controls the image sensing camera device to expose during the duration of the pulsed light. While the supplementary lighting device 33 adjusts the illumination source 32 to the second power level, the three-dimensional range of the LED light source pulsed light is a curved ACD on one side and a curved BCD on the other side. After the central control module acquires a high-brightness image of the target area, it makes a second adjustment. The supplementary lighting device adjusts the pulsed light range of the LED array light source again to a curved ACD on one side and a curved BCD on the other side, and then adjusts it again to a curved ACD on one side and a curved BCD on the other side.

[0027] Furthermore, the endoscope may also include a thermal management step: monitoring the temperature of the endoscope head and adjusting the parameters or frequency of the pulsed light based on the monitored temperature. The addition of a miniature temperature monitoring module integrated with the pulsed light source power supply solves the problems of low positioning accuracy, poor adaptability, and overheating of the head caused by pulsed light irradiation in traditional endoscope examinations, thus balancing examination accuracy and equipment safety.

[0028] In the specific structural design, the endoscope probe has a diameter of 4mm, and the head integrates two 2-megapixel CMOS sensor cameras (for binocular stereo vision) and a ring of high-efficiency white LEDs. The drive control module adopts a MOSFET-based switching constant current circuit, which can output two drive signals under the command of the central control module (embedded MCU): one is a continuous current of 80mA (first power level) for routine scanning; the other is a rectangular pulse current of 500mA with a pulse width of 1 / 1000 second (second power level) for supplementary lighting for photography. During routine scanning, the operator discovers a suspected crack at the root of a leaf through the video stream. The operator issues a command to perform a detailed inspection of the area by clicking on the handheld device buttons or software interface. After receiving the command, the central control module immediately executes: 1) sending a pulse trigger signal to the drive control module; 2) sending a global exposure trigger signal to the two CMOS sensor cameras and setting the exposure time to 1 / 1000 second. The LED illuminates instantaneously during exposure, emitting high-intensity light, and the CMOS sensor simultaneously captures a bright and detailed image of the crack. The image processing module enhances and stitches the image (binocular), and then the measurement software automatically calculates the length and width of the crack. After one pulse imaging cycle, the system automatically returns to the normal illumination scanning mode. The heat generated during the entire pulse process is negligible, and the temperature rise of the probe head is negligible.

[0029] Furthermore, in temperature regulation and control, the system incorporates a patch-type temperature sensing camera located at the probe head. The central control module reads the temperature value in real time and sets a safety threshold of 70°C. If the temperature sensing camera reading reaches 65°C due to multiple consecutive pulse imaging, the central control module activates a thermal management strategy, dynamically lowering the maximum allowable pulse drive current to 400mA and extending the minimum imaging interval from 0.5 seconds to 2 seconds. This measure ensures that the probe core temperature will not exceed the safe operating range of the components under any circumstances, achieving intelligent thermal protection. This invention's structural design effectively resolves the contradiction between brightness and heat generation, making it particularly suitable for fields such as aero-engines where extremely high detection accuracy and equipment reliability are required.

[0030] The above is one embodiment of the present invention. Furthermore, it should be noted that any equivalent or simple variations made to the structure, features, and principles described in this patent concept are included within the scope of protection of this patent.

Claims

1. An endoscopic inspection method based on pulsed illumination, characterized in that, include: Step S1: During the routine inspection phase, control the illumination power supply of the endoscope to provide continuous illumination at a first power level; Step S2: Identify the target area to be finely inspected; Step S3: In response to a fine detection command for the target area, switch to the photo mode; Step S4: In the photo mode, control the illumination power supply to emit at least one pulse of light at a second power level, and control the image sensing camera to expose during the duration of the pulse of light to acquire a high-brightness image of the target area; wherein the second power level is higher than the first power level; Step S5: Perform analysis or measurement based on the high-brightness image.

2. The endoscopic inspection method based on pulsed illumination according to claim 1, characterized in that, In step S2, the target area is located using a binocular vision method.

3. The endoscopic detection method based on pulsed illumination according to claim 2, characterized in that... It also includes tracking and adjusting pulsed light through three-dimensional stereoscopic measurement using binocular vision.

4. The endoscopic detection method based on pulsed illumination according to claim 3, characterized in that... The binocular vision method uses two calibrated camera units to perform at least two positioning scans on the three-dimensional object to be detected, outputting two or more sets of three-dimensional spatial coordinate data. After determining the target area, the positioning direction, distance, and area range of the pulse light are adjusted.

5. An endoscopic inspection method based on pulsed illumination according to claim 1, 2, 3, or 4, characterized in that... It also includes comparing the target area detected in step S2 with the image analysis or measurement values ​​in step S5, and adjusting the pulse light and its parameters or frequency in step S4 according to the shooting mode in step S3.

6. An endoscope inspection system based on pulsed illumination, used to implement the method of any one of claims 1-5, characterized in that, include: The endoscope probe detection module, drive control module, and central control module are included. The endoscope probe detection module integrates an image sensing camera and an illumination source. The drive control module is connected to the lighting light source and the pulse light source, and is used to drive the lighting light source to switch between continuous lighting mode and pulse lighting mode. The central control module includes a target area identification module for controlling the drive control module to send pulse drive signals, and a fine detection instruction module for synchronously controlling the image sensing camera to perform exposure in response to the identified target area.

7. The endoscope detection system based on pulsed illumination according to claim 6, wherein the central control module further includes a binocular vision positioning module for identifying the target area.

8. The endoscopic inspection system based on pulsed illumination according to claim 7, characterized in that, The central control module also includes an image analysis or measurement module, used to analyze the detection results, and after comparing and analyzing the detection results and identifying various parameters of the target area, the central control module readjusts the illumination power supply to pulse light to determine the target area.

9. An endoscopic inspection system based on pulsed illumination according to claim 8, characterized in that... The drive control module also includes a constant current drive circuit module and a pulse modulation circuit module.

10. An endoscope with a pulsed illumination device, used in an endoscope according to any one of the methods or systems of claims 1-8, wherein the endoscope (2) comprises a mounting plate (4), a probe (3) comprises a detection sensing camera device (31), and an illumination source (32), characterized in that... It also has a supplementary lighting device (33) for adjusting the pulse light direction range after multiple binocular visual stereo positioning of the detected object. The illumination source (32) is set as an LED array illumination source. The supplementary lighting device (33) includes an angle fine-tuning component consisting of one or more micro servo motors, which respectively control the adjustment of the horizontal pitch axis, vertical yaw axis, and forward roll axis of the LED array illumination source.

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