Medical fluorescence endoscope cold light source automatic control system based on MEMS sensor

Abstract

The application discloses a medical fluorescent endoscope cold light source automatic control system based on a MEMS sensor and relates to the endoscope field. The medical fluorescent endoscope cold light source automatic control system based on the MEMS sensor comprises at least one MEMS acceleration sensor, which is installed in an endoscope camera head; a data acquisition module is connected with the MEMS acceleration sensor; a sliding window storage module is used for storing acceleration data of a latest preset number of sampling periods; a state judgment module is used for calculating average absolute change amounts in X, Y and Z directions according to the acceleration data in the sliding window; and a light source power control module is connected with a cold light source of the medical fluorescent endoscope. The system is based on accurate identification of a motion / static state, when the endoscope is static in a patient's body, the system reduces output power, and a dynamic power adjustment mechanism ensures that the light power output is automatically reduced when the endoscope is static.

Description

Technical Field

[0001] This invention relates to the field of endoscopy, and in particular to an automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors. Background Technology

[0002] Medical fluorescence endoscope systems are widely used in minimally invasive surgery, and their cold light source provides high-brightness illumination for the surgical field. Existing endoscopic cold light source systems typically employ a constant power output mode, providing continuous illumination at a fixed power throughout the entire surgical procedure. This mode presents the following technical problems: Localized overheating of the equipment: The light source operates at high power for a long time, causing the temperature of components such as the endoscope handle and body to rise significantly. Users may suffer skin burns if they hold the device for an extended period of time.

[0003] Visual safety hazards to users: The high-brightness cold light source continues to output high power even when the device is removed from the patient's body or is not in use. The strong light shines directly or is reflected into the user's eyes, which can easily cause eye fatigue or even retinal damage.

[0004] Risk of thermal damage to patient tissues: When the endoscope is stationary in a certain position inside the patient's body, continuous high-power irradiation may cause the local tissue temperature to rise, causing thermal damage to sensitive organs (such as the retina and intra-abdominal tissues).

[0005] Operating room fire hazards: Prolonged static irradiation of a high-power cold light source or auxiliary laser light source in a localized area may cause the temperature of nearby combustibles (such as surgical drapes and gauze) to rise to their ignition point, increasing the risk of fire in the operating room.

[0006] Shortened lifespan of cold light sources: The constant high-power operating mode keeps light sources (such as LEDs and xenon lamps) at full load for a long time, accelerating light decay, resulting in a shortened lifespan of the light source, increased equipment maintenance frequency, and increased operating costs.

[0007] Low energy efficiency: In scenarios where high-brightness lighting is not required (such as when the endoscope is removed from the patient's body or when it is stationary), the light source still outputs full power, resulting in unnecessary waste of electricity. Summary of the Invention

[0008] The purpose of this invention is to provide an automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors, comprising: At least one MEMS accelerometer sensor is installed inside the endoscope camera to collect real-time acceleration data of the endoscope in the X, Y, and Z directions. The data acquisition module is connected to the MEMS accelerometer and acquires the acceleration data at a preset sampling period. A sliding window storage module is used to store acceleration data for the most recent preset number of sampling periods; The state judgment module is used to calculate the average absolute change in the X, Y, and Z directions based on the acceleration data in the sliding window, and to determine that the endoscope is in a stationary state when the average absolute change in the three directions is less than a preset threshold; otherwise, it is determined to be in a moving state. The light source power control module is connected to the cold light source of the medical fluorescence endoscope and is used to dynamically adjust the output power of the cold light source according to the result of the state judgment module. When the state judgment module switches from a moving state to a stationary state, the light source power control module linearly reduces the output power of the cold light source from the current power to the target power within a preset time. When the state judgment module switches from a static state to a moving state, the light source power control module immediately restores the output power of the cold light source to the power before the moving state.

[0010] The MEMS accelerometer is built into the endoscope camera to collect acceleration data in the X, Y, and Z directions in real time. The data acquisition module reads this data according to a preset sampling period. The sliding window storage module saves data from the most recent preset number of sampling periods. The state judgment module calculates the average absolute change in the three directions based on the data in the sliding window and compares it with a preset threshold: if the average absolute change in the three directions is less than the threshold, the endoscope is determined to be stationary; otherwise, it is determined to be in motion. The light source power control module performs power adjustment according to the judgment result—when switching from motion to stationary, the power of the cold light source is linearly reduced from the current power to the target power within a preset time; when switching from stationary to motion, the power is immediately restored to the value before motion.

[0011] By detecting the movement / stationary state of the endoscope in real time and dynamically adjusting the power of the light source accordingly, the continuous high power output during the stationary period is avoided, thereby directly solving the problems of equipment overheating, visual safety hazards to users, thermal damage to patient tissues, fire risk, shortened lifespan of the light source, and low energy efficiency in the background technology.

[0012] Preferably, the sampling period is 10 milliseconds. The data acquisition module reads the X, Y, and Z data from the MEMS accelerometer at 10-millisecond intervals to ensure the system can respond promptly to changes in the endoscope's motion. The 10-millisecond sampling period can capture rapid jitter (micro-motion) when the hand holds the endoscope, keeping the state switching delay within the millisecond level. This ensures that motion / stationary changes are detected in a very short time, allowing for timely adjustment of the light source power and avoiding misjudgments or delayed responses due to slow sampling.

[0013] Preferably, the preset number is CNT data points, where CNT is an integer greater than 1. The sliding window storage module stores CNT data points (CNT is an integer greater than 1), overwriting the oldest data each time new data enters, ensuring that the state judgment is always based on historical data from the most recent CNT sampling periods. By setting a sliding window size greater than 1, misjudgments of the state due to single-sampling noise or instantaneous jitter are avoided. The window size CNT can be adjusted according to actual needs, balancing response speed and judgment stability.

[0014] Preferably, the average absolute change is calculated as follows: for the X, Y and Z directions, calculate the absolute difference of acceleration values ​​between adjacent sampling points within the sliding window, then sum the absolute differences in each direction and divide by the difference of CNT minus one to obtain the average absolute change in that direction.

[0015] For each of the X, Y, and Z directions, the state determination module first calculates the absolute difference in acceleration values ​​between adjacent sampling points within the sliding window. Then, it sums all the absolute differences and divides by (CNT minus 1) to obtain the average absolute change in that direction within the window. Using the average absolute change instead of the instantaneous change effectively filters out sensor noise and occasional interference, improves the accuracy and robustness of static / motion state determination, and avoids frequent erroneous adjustments to the light source power caused by minor noise.

[0016] Preferably, the preset time is 3 seconds. When the system switches from a moving state to a stationary state, the light source power control module completes a linear reduction process from the current power to the target power within 3 seconds. The 3-second power reduction duration has been experimentally optimized to avoid the visual abruptness caused by sudden power drops and to quickly restore high power after the endoscope is briefly removed from the patient's body (such as for wiping the lens), without affecting the continuity of the surgical operation.

[0017] Preferably, during the linear reduction process, in time... Light source power at time satisfy: ; in, The current power at the time of the switch. The target power in a stationary state. The preset time is [the time specified in the original text].

[0018] At any time during the linear decrease process Light source power According to the formula Calculation, where The current power at the time of switching. The target power in a stationary state. The total power reduction time is preset. The linear interpolation formula ensures that the power decreases uniformly over time, making the light intensity change smooth and continuous, avoiding flicker or sudden stimulation to the user's eyes, while providing doctors with predictable brightness changes and improving surgical comfort.

[0019] Preferably, the light source power control module updates the light source power gradually at preset time intervals until the target power is reached. The light source power control module updates the light source power gradually at preset time intervals (e.g., every 100 milliseconds), waiting for the next interval after each update before continuing, until the target power is reached. Using discrete time steps to update the power reduces the computational load on the MCU, avoids excessive processing resources being consumed by continuous real-time calculations, and still achieves a smooth power transition, meeting the actual operating requirements of embedded systems.

[0020] Preferably, the preset time interval is 100 milliseconds. Specifically, the preset time interval is 100 milliseconds. That is, every 100 milliseconds, the MCU calculates and sends a new power value to the light source driving circuit. The 100-millisecond update interval makes the brightness step virtually imperceptible to the eye, while providing sufficient idle time for other system tasks (such as image acquisition and video output), achieving the best balance between power smoothness and system real-time performance.

[0021] Preferably, the system also includes a host MCU, in which the data acquisition module, sliding window storage module, status judgment module, and light source power control module are integrated. Integrating all logic functions into a single MCU simplifies the system hardware architecture, reduces cost and power consumption, facilitates firmware upgrades and maintenance, and improves system reliability and manufacturability.

[0022] Preferably, the MEMS accelerometer has a measurement range of not less than ±50g, a bandwidth of not less than 10kHz, and a noise density of not more than 30μg / √Hz.

[0023] The technical effects and advantages of this invention are as follows: 1. The automatic control system for the cold light source of this MEMS sensor in a medical fluorescence endoscope uses a MEMS accelerometer to detect the movement / stationary state of the endoscope in real time. When the endoscope is stationary, the system automatically reduces the output power of the cold light source, avoiding continuous high-power heating during periods of inactivity. This effectively suppresses the temperature rise of the handle and endoscope, reducing the risk of skin burns to the user. When the endoscope is stationary (such as when it is removed from the patient's body or placed on the instrument table), the system automatically reduces the light source power, minimizing strong light exposure during non-observation periods and protecting the user's eyes from unnecessary strong light stimulation and retinal damage.

[0024] 2. The automatic control system for the medical fluorescence endoscope cold light source using this MEMS sensor accurately identifies motion / stationary states. When the endoscope is stationary inside the patient, the system reduces its output power to prevent local tissues from overheating due to prolonged high-power irradiation, thus reducing the risk of thermal damage to patient tissues. The dynamic power adjustment mechanism ensures automatic reduction of light power output when the endoscope is stationary, minimizing the possibility of prolonged high-power light source irradiation in localized areas and effectively reducing the risk of fire in the operating room.

[0025] 3. The automatic control system for the cold light source of the medical fluorescence endoscope using this MEMS sensor reduces the cumulative time the light source operates at full load by automatically reducing power when stationary, thus slowing down the light decay process, extending the life of the light source, and reducing the frequency of equipment replacement and maintenance costs. The system maintains high power output only when high-brightness illumination is needed (i.e., when the endoscope is in motion), and automatically switches to low-power mode when stationary, achieving on-demand power supply and reducing unnecessary energy consumption. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the system architecture of the present invention; Figure 2 This is a flowchart of the method of the present invention; Figure 3 This is a schematic diagram illustrating the application of an embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This invention provides, for example Figures 1-3 The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors, as shown, includes: At least one MEMS accelerometer sensor is installed inside the endoscope camera to collect real-time acceleration data of the endoscope in the X, Y, and Z directions. The data acquisition module is connected to the MEMS accelerometer and acquires acceleration data at a preset sampling period. A sliding window storage module is used to store acceleration data for the most recent preset number of sampling periods; The state judgment module is used to calculate the average absolute change in the X, Y, and Z directions based on the acceleration data in the sliding window, and to determine that the endoscope is in a stationary state when the average absolute change in the three directions is less than a preset threshold; otherwise, it is determined to be in a moving state. The light source power control module is connected to the cold light source of the medical fluorescence endoscope and is used to dynamically adjust the output power of the cold light source based on the result of the status judgment module. When the state judgment module switches from motion state to stationary state, the light source power control module linearly reduces the output power of the cold light source from the current power to the target power within a preset time. When the state judgment module switches from a static state to a moving state, the light source power control module immediately restores the output power of the cold light source to the power before the moving state.

[0029] The MEMS accelerometer is built into the endoscope camera to collect acceleration data in the X, Y, and Z directions in real time. The data acquisition module reads this data according to a preset sampling period. The sliding window storage module saves data from the most recent preset number of sampling periods. The state judgment module calculates the average absolute change in the three directions based on the data in the sliding window and compares it with a preset threshold: if the average absolute change in the three directions is less than the threshold, the endoscope is determined to be stationary; otherwise, it is determined to be in motion. The light source power control module performs power adjustment according to the judgment result—when switching from motion to stationary, the power of the cold light source is linearly reduced from the current power to the target power within a preset time; when switching from stationary to motion, the power is immediately restored to the value before motion.

[0030] By detecting the movement / stationary state of the endoscope in real time and dynamically adjusting the power of the light source accordingly, the continuous high power output during the stationary period is avoided, thereby directly solving the problems of equipment overheating, visual safety hazards to users, thermal damage to patient tissues, fire risk, shortened lifespan of the light source, and low energy efficiency in the background technology.

[0031] The system uses a MEMS accelerometer to monitor the endoscope's motion / stationary state in real time. When the endoscope is stationary, it automatically reduces the output power of the cold light source, avoiding continuous high-power heating during periods of inactivity. This effectively suppresses the temperature rise of the handle and endoscope, reducing the risk of skin burns to the user. When the endoscope is stationary (such as when it is removed from the patient's body or placed on the instrument table), the system automatically reduces the light source power, minimizing strong light exposure during non-observation periods and protecting the user's eyes from unnecessary strong light stimulation and retinal damage.

[0032] Based on accurate identification of motion / stationary states, the system reduces output power when the endoscope is stationary inside the patient, preventing local tissues from overheating due to prolonged high-power irradiation and reducing the risk of thermal damage to patient tissues. The dynamic power adjustment mechanism ensures automatic reduction of optical power output when the endoscope is stationary, minimizing the possibility of prolonged high-power light source irradiation in localized areas and effectively reducing the risk of fire in the operating room.

[0033] By automatically reducing power when stationary, the system minimizes the accumulated time the light source operates at full load, slows down the light decay process, and thus extends the lifespan of the light source, reducing equipment replacement frequency and maintenance costs. The system maintains high power output only when high-brightness illumination is needed (i.e., when the endoscope is in motion), and automatically switches to low-power mode when stationary, achieving on-demand power supply and reducing unnecessary energy consumption.

[0034] Furthermore, the sampling period is 10 milliseconds. The data acquisition module reads the X, Y, and Z data from the MEMS accelerometer at 10-millisecond intervals to ensure the system can respond promptly to changes in endoscope movement. The 10-millisecond sampling period can capture rapid jitters (micro-motions) when the hand holds the endoscope, keeping the state switching delay within the millisecond level. This ensures that motion / stationary changes are detected in a very short time, allowing for timely adjustment of the light source power and avoiding misjudgments or delayed responses caused by slow sampling.

[0035] Furthermore, the preset number of data points is CNT, where CNT is an integer greater than 1. The sliding window storage module stores CNT data points (CNT is an integer greater than 1), overwriting the oldest data each time new data arrives, ensuring that state judgments are always based on historical data from the most recent CNT sampling periods. By setting a sliding window size greater than 1, misjudgments of state due to single-sampling noise or momentary jitter are avoided. The window size CNT can be adjusted according to actual needs, balancing response speed and judgment stability.

[0036] Furthermore, the average absolute change is calculated as follows: for the X, Y, and Z directions, calculate the absolute difference in acceleration values ​​between adjacent sampling points within the sliding window, then sum the absolute differences in each direction and divide by the difference of CNT minus one to obtain the average absolute change in that direction.

[0037] For each of the X, Y, and Z directions, the state determination module first calculates the absolute difference in acceleration values ​​between adjacent sampling points within the sliding window. Then, it sums all the absolute differences and divides by (CNT minus 1) to obtain the average absolute change in that direction within the window. Using the average absolute change instead of the instantaneous change effectively filters out sensor noise and occasional interference, improves the accuracy and robustness of static / motion state determination, and avoids frequent erroneous adjustments to the light source power caused by minor noise.

[0038] Furthermore, the preset time is 3 seconds. When the system switches from a moving state to a stationary state, the light source power control module completes a linear reduction process from the current power to the target power within 3 seconds. The 3-second power reduction duration has been experimentally optimized to avoid the visual abruptness caused by sudden power drops, and to quickly restore high power after the endoscope is briefly removed from the patient's body (such as for wiping the lens), without affecting the continuity of the surgical operation.

[0039] Furthermore, during the linear decrease, in time... Light source power at time satisfy: ; in, The current power at the time of the switch. The target power in a stationary state. This is the preset time.

[0040] At any time during the linear decrease process Light source power According to the formula Calculation, where The current power at the time of switching. The target power in a stationary state. The total power reduction time is preset. The linear interpolation formula ensures that the power decreases uniformly over time, making the light intensity change smooth and continuous, avoiding flicker or sudden stimulation to the user's eyes, while providing doctors with predictable brightness changes and improving surgical comfort.

[0041] Furthermore, the light source power control module updates the light source power incrementally at preset time intervals until the target power is reached. The module updates the light source power incrementally at preset time intervals (e.g., every 100 milliseconds), waiting for the next interval after each update before continuing until the target power is reached. Using discrete time steps to update power reduces the computational load on the MCU, avoiding excessive processing resources consumed by continuous real-time calculations, while still achieving smooth power transitions, meeting the actual operational requirements of embedded systems.

[0042] Furthermore, the preset time interval is 100 milliseconds. Specifically, the preset time interval is 100 milliseconds. That is, every 100 milliseconds, the MCU calculates and sends a new power value to the light source driver circuit. This 100-millisecond update interval makes the brightness jump virtually imperceptible visually, while providing ample computational idle time for other system tasks (such as image acquisition and video output), achieving an optimal balance between power smoothness and system real-time performance.

[0043] Furthermore, it also includes a host MCU, integrating the data acquisition module, sliding window storage module, status judgment module, and light source power control module. Integrating all logic functions into a single MCU simplifies the system hardware architecture, reduces cost and power consumption, while facilitating firmware upgrades and maintenance, and improving system reliability and manufacturability.

[0044] Furthermore, the MEMS accelerometer has a measurement range of not less than ±50g, a bandwidth of not less than 10kHz, and a noise density of not more than 30μg / √Hz.

[0045] The system uses a MEMS accelerometer to monitor the endoscope's motion / stationary state in real time. When the endoscope is stationary, it automatically reduces the output power of the cold light source, avoiding continuous high-power heating during periods of inactivity. This effectively suppresses the temperature rise of the handle and endoscope, reducing the risk of skin burns to the user. When the endoscope is stationary (such as when it is removed from the patient's body or placed on the instrument table), the system automatically reduces the light source power, minimizing strong light exposure during non-observation periods and protecting the user's eyes from unnecessary strong light stimulation and retinal damage.

[0046] Based on accurate identification of motion / stationary states, the system reduces output power when the endoscope is stationary inside the patient, preventing local tissues from overheating due to prolonged high-power irradiation and reducing the risk of thermal damage to patient tissues. The dynamic power adjustment mechanism ensures automatic reduction of optical power output when the endoscope is stationary, minimizing the possibility of prolonged high-power light source irradiation in localized areas and effectively reducing the risk of fire in the operating room.

[0047] By automatically reducing power when stationary, the system minimizes the accumulated time the light source operates at full load, slows down the light decay process, and thus extends the lifespan of the light source, reducing equipment replacement frequency and maintenance costs. The system maintains high power output only when high-brightness illumination is needed (i.e., when the endoscope is in motion), and automatically switches to low-power mode when stationary, achieving on-demand power supply and reducing unnecessary energy consumption.

[0048] Example: This example provides an automatic control system for a cold light source of a medical fluorescence endoscope based on a MEMS sensor. The MEMS accelerometer used is the ADXL1002 type. Those skilled in the art can also choose other MEMS accelerometers with similar performance, as long as they can detect minute acceleration changes when the endoscope is held. The system includes: a MEMS accelerometer, a data acquisition module, a sliding window storage module, a status judgment module, a light source power control module, and a host MCU. The data acquisition module, sliding window storage module, status judgment module, and light source power control module are integrated into the host MCU.

[0049] Key characteristics of the MEMS accelerometer: measurement range ±50g, bandwidth up to 11kHz, typical noise density 25μg / √Hz, and linearity 0.1%FS. This sensor accurately captures minute vibrations (including hand-grip micro-motions) generated when a person holds an endoscope. Installed inside the endoscope's camera, it outputs real-time acceleration data in the X, Y, and Z orthogonal directions.

[0050] I. Data Acquisition and Sliding Window Storage: The data acquisition module reads the sensor's acceleration value with a sampling period of 10 milliseconds. Let the value at the nth sampling moment be... , , .

[0051] The sliding window storage module maintains a sliding window of size CNT (CNT is an integer greater than 1; in this embodiment, CNT = 50), storing the data of the most recent CNT sampling points in the X, Y, and Z directions respectively. The update rule is "first-in, first-out," meaning that new data overwrites the oldest data in the window, ensuring that each judgment is based on the latest CNT sampling points.

[0052]

[0053]

[0054] II. Status Judgment: Motion / Station Detection The status judgment module calculates the average absolute change based on the acceleration data within the sliding window and compares it with a preset threshold to determine the motion status of the endoscope.

[0055] (1) Calculate the absolute change between adjacent sampling points For each direction, calculate the absolute difference between the acceleration value of the current sampling point and the previous sampling point:

[0056]

[0057]

[0058] (2) Calculate the average absolute change Calculate the arithmetic mean of the absolute differences of all adjacent points within the sliding window in the X, Y, and Z directions, respectively.

[0059]

[0060]

[0061] (3) Threshold comparison and state determination Set a preset threshold (This embodiment uses 0.05g; in actual applications, this can be adjusted based on sensor characteristics and usage scenarios.) If and only if , , When both conditions are met, the state judgment module outputs "static state"; otherwise, it outputs "motion state" (or vibration state).

[0062] III. Light Source Power Control: The light source power control module receives the status judgment result and dynamically adjusts the output power of the cold light source (such as an LED cold light source) based on the status switching event. Let the normal operating power be... (e.g., 100% brightness), the target power in a stationary state is (e.g., 20% brightness).

[0063] (1) Motion → Rest: Linear power reduction When the state changes from "moving" to "stationary", the power control module initiates a linear power reduction process. Total power reduction duration. Set to 3 seconds. Use linear interpolation at any point during the power reduction period. ( ), light source output power Calculate using the following formula:

[0064] in, The current power at the time of the switch (usually 1000 kW) ).

[0065] To avoid frequent continuous calculations, power can be updated using discrete time steps. In this embodiment, the power update time interval is set to 100 milliseconds, and the total number of steps is... .

[0066] In the step At that time, the power value is:

[0067] Every 100 milliseconds, the MCU sends a new power setting value to the light source driver circuit until it reaches the set value. .

[0068] (2) Rest → Movement: Immediate recovery In a static state, the state determination module continuously monitors the average absolute change. Once detected... Any value exceeding the threshold (That is, when the endoscope resumes movement), the power control module immediately restores the output power of the cold light source to the value before the power reduction. This ensures that the brightness of the surgical field is restored in a timely manner, so as not to affect the doctor's operation.

[0069] Workflow: S1. System Initialization: Set sampling period to 10ms, sliding window size to CNT, and stillness threshold. Total duration of power reduction Power update interval 100 milliseconds, target power .

[0070] S2. Loop data acquisition: Read the X, Y, and Z acceleration values ​​of the MEMS sensor every 10ms and update the sliding window.

[0071] S3. Calculate the average absolute change: Calculate based on all adjacent points within the current window. .

[0072] S4. State determination: If , , If it is static, it is considered to be in motion; otherwise, it is considered to be in motion.

[0073] S5, Power Control: If the current state is in motion and the previous state was at rest (i.e., from rest to motion), immediately restore power to [the previous state]. .

[0074] If the current state is stationary and the previous state was in motion (i.e., motion → stationary), start. Linear power reduction to .

[0075] Otherwise, maintain the current power level.

[0076] S6. Repeat steps S2 to S5 until the surgery is completed or the system is shut down.

[0077] The system uses a MEMS accelerometer to monitor the endoscope's motion / stationary state in real time. When the endoscope is stationary, it automatically reduces the output power of the cold light source, avoiding continuous high-power heating during periods of inactivity. This effectively suppresses the temperature rise of the handle and endoscope, reducing the risk of skin burns to the user. When the endoscope is stationary (such as when it is removed from the patient's body or placed on the instrument table), the system automatically reduces the light source power, minimizing strong light exposure during non-observation periods and protecting the user's eyes from unnecessary strong light stimulation and retinal damage.

[0078] Based on accurate identification of motion / stationary states, the system reduces output power when the endoscope is stationary inside the patient, preventing local tissues from overheating due to prolonged high-power irradiation and reducing the risk of thermal damage to patient tissues. The dynamic power adjustment mechanism ensures automatic reduction of optical power output when the endoscope is stationary, minimizing the possibility of prolonged high-power light source irradiation in localized areas and effectively reducing the risk of fire in the operating room.

[0079] By automatically reducing power when stationary, the system minimizes the accumulated time the light source operates at full load, slows down the light decay process, and thus extends the lifespan of the light source, reducing equipment replacement frequency and maintenance costs. The system maintains high power output only when high-brightness illumination is needed (i.e., when the endoscope is in motion), and automatically switches to low-power mode when stationary, achieving on-demand power supply and reducing unnecessary energy consumption.

[0080] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors, characterized in that, include: At least one MEMS accelerometer sensor is installed inside the endoscope camera to collect real-time acceleration data of the endoscope in the X, Y, and Z directions. The data acquisition module is connected to the MEMS accelerometer and acquires the acceleration data at a preset sampling period. A sliding window storage module is used to store acceleration data for the most recent preset number of sampling periods; The state judgment module is used to calculate the average absolute change in the X, Y, and Z directions based on the acceleration data in the sliding window, and to determine that the endoscope is in a stationary state when the average absolute change in the three directions is less than a preset threshold; otherwise, it is determined to be in a moving state. The light source power control module is connected to the cold light source of the medical fluorescence endoscope and is used to dynamically adjust the output power of the cold light source according to the result of the state judgment module. When the state judgment module switches from a moving state to a stationary state, the light source power control module linearly reduces the output power of the cold light source from the current power to the target power within a preset time. When the state judgment module switches from a static state to a moving state, the light source power control module immediately restores the output power of the cold light source to the power before the moving state.

2. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, The sampling period is 10 milliseconds.

3. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, The preset number is CNT data points, where CNT is an integer greater than 1.

4. The automatic control system for a cold light source of a medical fluorescence endoscope based on a MEMS sensor according to claim 3, characterized in that, The average absolute change is calculated as follows: for the X, Y and Z directions, calculate the absolute difference of acceleration values ​​between adjacent sampling points within the sliding window, then sum the absolute differences in each direction and divide by the difference of CNT minus one to obtain the average absolute change in that direction.

5. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, The preset time is 3 seconds.

6. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, During the linear decrease, in time Light source power at time satisfy: ； in, The current power at the time of the switch. The target power in a stationary state. The preset time is [the time specified in the original text].

7. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, The light source power control module updates the light source power gradually at preset time intervals until the target power is reached.

8. The automatic control system for a cold light source of a medical fluorescence endoscope based on a MEMS sensor according to claim 7, characterized in that, The preset time interval is 100 milliseconds.

9. The automatic control system for a cold light source of a medical fluorescence endoscope based on MEMS sensors according to claim 1, characterized in that, It also includes a host MCU, in which the data acquisition module, sliding window storage module, status judgment module and light source power control module are integrated.

10. The automatic control system for a cold light source of a medical fluorescence endoscope based on a MEMS sensor according to claim 1, characterized in that, The MEMS accelerometer has a measurement range of not less than ±50g, a bandwidth of not less than 10kHz, and a noise density of not more than 30μg / √Hz.

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