Shadowless lamp light spot adjusting system and method and shadowless lamp

Abstract

The invention relates to the technical field of medical instruments, in particular to a shadowless lamp light spot adjusting system and method and a shadowless lamp. The system comprises a laser distance measuring sensor which is used for detecting the linear height between the lamp surface of the shadowless lamp and the ground; the angle sensor is used for detecting the angle between the lamp holder of the shadowless lamp and the ground; the main control board is connected with the laser distance measuring sensor and the angle sensor and used for receiving the linear height information and the angle information and calculating the vertical height from the shadowless lamp to the ground based on the linear height information and the angle information; the algorithm module is used for calculating proper light spot parameters based on the vertical height; and the driving board is connected with the main control board and is used for receiving the light spot parameters and adjusting the brightness proportion of each group of LED lamps in the shadowless lamp based on the light spot parameters so as to realize automatic adjustment of the sizes of the light spots. The device can accurately focus the target area according to the height change, improves the illumination effect, is low in cost, is high in precision, has automatic detection and adjustment functions, is convenient to use, and is stable in performance.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a shadowless light spot adjustment system and method, and a shadowless lamp. Background Art

[0002] Shadowless lamps, as medical lighting equipment, are widely used in operating rooms. Their performance directly impacts the smooth progress of surgical procedures. Light spot quality is a key evaluation criterion for shadowless lamp performance. The ability to adjust light spot size is crucial to the flexibility of surgical lighting. An ideal shadowless lamp should offer continuous and precise brightness and spot size adjustment to meet the diverse needs of different surgical scenarios.

[0003] In practice, if the spot size of a shadowless lamp cannot be flexibly adjusted, it may cause localized shadows and uneven light spots, directly affecting the clarity of the surgical field of view and increasing the difficulty and risk of the operation. Furthermore, when the height of the shadowless lamp is adjusted to suit the surgeon's position or other operational requirements, the light spot often struggles to maintain the ideal focus distance from the illumination target, resulting in a significant decrease in lighting efficiency. These issues severely restrict the applicability of shadowless lamps in complex surgical scenarios.

[0004] Currently, a common spot adjustment technology for shadowless lamps on the market is an automatic adjustment method based on ultrasound. This technology uses ultrasonic ranging to detect height changes between the lamp and the target, transmitting the measured data to a control board, which adjusts the spot size based on a program algorithm to ensure stable lighting in the surgical area. However, ultrasonic ranging technology has the following obvious drawbacks in practical applications:

[0005] Low ranging accuracy: The accuracy of ultrasonic ranging is affected by a variety of factors, including the signal-to-noise ratio of the echo signal, transmission power, ambient temperature, and humidity. Ranging errors increase significantly under low signal-to-noise ratio conditions. Furthermore, multiple ultrasonic ranging systems operating simultaneously are prone to mutual interference, further reducing ranging accuracy.

[0006] Greatly affected by environmental factors: The propagation speed of ultrasound is significantly affected by temperature, humidity and atmospheric pressure. Changes in these environmental factors will cause deviations in the measurement results, thereby affecting the accuracy of the spot adjustment.

[0007] Slow ranging speed: Compared with laser ranging and millimeter wave ranging, ultrasonic ranging has a slower response speed, which is particularly insufficient in scenarios where the spot size needs to be adjusted quickly.

[0008] Measurement limitations: When the shadowless lamp's surface is tilted to the ground, a single ultrasonic sensor can only measure the linear height, but cannot accurately determine the vertical height from the lamp to the ground. This limitation further affects the accuracy of light spot adjustment, resulting in reduced lighting efficiency.

[0009] In summary, while existing ultrasound-based spot adjustment technology offers certain automation features, it suffers from numerous deficiencies in ranging accuracy, environmental adaptability, response speed, and measurement range. These issues hinder the effectiveness of shadowless lamps in demanding surgical scenarios, necessitating optimization and improvement through more advanced ranging and control technologies to enhance the stability and reliability of surgical lighting. Summary of the Invention

[0010] The object of the present invention is to overcome the above-mentioned defects of the prior art and thereby provide a shadowless lamp light spot adjustment system, method and shadowless lamp.

[0011] In order to solve the above technical problems, the technical solution of the present invention provides a shadowless light spot adjustment system, comprising:

[0012] Laser distance sensor, used to detect the straight-line height between the shadowless lamp surface and the ground;

[0013] Angle sensor, used to detect the angle between the shadowless lamp head and the ground;

[0014] A main control board is connected to the laser distance sensor and the angle sensor, and is used to receive straight line height information and angle information, and calculate the vertical height of the shadowless lamp to the ground based on the straight line height information and angle information;

[0015] an algorithm module for calculating suitable spot parameters based on vertical height; and

[0016] The driver board is connected to the main control board, and is used to receive the light spot parameters and adjust the brightness ratio of each group of LED lights in the shadowless lamp based on the light spot parameters, thereby realizing automatic adjustment of the light spot size.

[0017] As an improvement of the above system, the system further includes: a surface-mounted control panel for displaying light spot data.

[0018] As an improvement to the above system, the laser ranging sensor detects the target distance through infrared laser pulses and combines with a single photon avalanche diode receiving array to ensure ranging accuracy in complex environments.

[0019] As an improvement to the above system, the model of the laser ranging sensor is VL53L1X laser sensor.

[0020] As an improvement to the above system, the angle sensor is mounted on a main control board, and the main control board is parallel to the lamp surface of the shadowless lamp.

[0021] As an improvement to the above system, the algorithm module is arranged on the main control board.

[0022] As an improvement to the above system, the algorithm module reads the vertical height data at preset intervals, thereby monitoring the distance from the shadowless lamp to the illumination target in real time; when the algorithm module detects a change in the vertical height data, the algorithm module calculates the light spot parameters based on the difference between the current vertical height and the previous vertical height; the driving board adjusts the brightness of the LED lights in the inner circle and / or the brightness of the LED lights in the outer circle of the shadowless lamp according to the light spot parameters to change the light spot size, ensure that the light spot size remains unchanged before and after the vertical height change, and realize automatic adjustment of the light spot size.

[0023] As an improvement to the above system, when the vertical height increases, the brightness of the LED lights in the inner circle of the shadowless lamp increases, and the brightness of the LED lights in the outer circle decreases to increase the light spot; when the vertical height decreases, the brightness of the LED lights in the inner circle of the shadowless lamp decreases, and the brightness of the LED lights in the outer circle increases to reduce the light spot, thereby ensuring that the light spot size remains unchanged before and after the vertical height changes.

[0024] To achieve another purpose of the present invention, the present invention also provides a shadowless lamp light spot adjustment method, which is implemented based on the above-mentioned shadowless lamp light spot adjustment system, including: detecting the straight-line height between the lamp surface of the shadowless lamp and the ground through a laser ranging sensor; detecting the angle between the lamp head of the shadowless lamp and the ground through an angle sensor; receiving the straight-line height information and angle information through a main control board, and calculating the vertical height from the shadowless lamp to the ground based on the straight-line height information and angle information; calculating suitable light spot parameters based on the vertical height through an algorithm module; receiving the light spot parameters through a driving board, and adjusting the brightness ratio of each group of LED lights in the shadowless lamp based on the light spot parameters, thereby realizing automatic adjustment of the light spot size.

[0025] To achieve another object of the present invention, the present invention also provides a shadowless lamp, including the above-mentioned shadowless lamp light spot adjustment system.

[0026] Compared to the existing technology, the advantages of the present invention are that the shadowless light spot adjustment system, method, and shadowless lamp provided by the present invention can automatically detect distance changes and adjust the light spot to the appropriate target lighting position when the height position of the shadowless lamp changes, always keeping the light spot size precisely focused on the target area, ensuring that the clinical lighting effect is completely consistent with the laboratory test effect. In addition, the present invention uses a laser ranging sensor with the characteristics of low cost, small size, high efficiency and high precision; combined with an angle sensor and a laser ranging sensor, it can achieve accurate calculation of the vertical height of the lamp head; the present invention has automatic detection and automatic adjustment functions, which significantly improves the convenience of use and the stability of the lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a shadowless light spot adjustment system provided in Example 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the main program of the shadowless light spot adjustment system. DETAILED DESCRIPTION

[0029] The technical solution provided by the present invention is further illustrated below with reference to embodiments.

[0030] This application uses laser ranging technology to solve the problems of low ranging accuracy, great influence of environmental factors and poor directionality in traditional methods, and achieves accurate measurement of vertical height by adding an angle sensor.

[0031] Example 1

[0032] This embodiment provides a shadowless light spot adjustment system, comprising:

[0033] Laser distance sensor, used to detect the straight-line height between the shadowless lamp surface and the ground;

[0034] Angle sensor, used to detect the angle between the shadowless lamp head and the ground;

[0035] A main control board is connected to the laser distance sensor and the angle sensor, and is used to receive straight line height information and angle information, and calculate the vertical height of the shadowless lamp to the ground based on the straight line height information and angle information;

[0036] The driver board is connected to the main control board, and is used to receive the light spot parameters and adjust the brightness ratio of each group of LED lights in the shadowless lamp based on the light spot parameters, thereby realizing automatic adjustment of the light spot size.

[0037] Algorithm module for calculating appropriate spot parameters based on vertical height.

[0038] Specifically, the algorithm module reads the vertical height data at preset time intervals, thereby monitoring the distance between the shadowless lamp and the illumination target in real time; when the algorithm module detects that the vertical height data has changed, the algorithm module calculates the light spot parameters based on the difference between the current vertical height and the previous vertical height; the driver board adjusts the brightness of the LED lights in the inner circle and / or the brightness of the LED lights in the outer circle of the shadowless lamp according to the light spot parameters to change the light spot, ensure that the light spot size remains unchanged before and after the vertical height change, and realize automatic adjustment of the light spot size.

[0039] Specifically, the laser ranging sensor calculates the straight-line height between the shadowless lamp surface and the ground, that is, the target distance, by emitting laser pulses and receiving reflected signals. The specific calculation is as follows:

[0040] By comparing the changes in the front and back distances, the driving board adjusts the brightness of each group of LED lights in the inner and outer circles of the shadowless lamp to change the light spot. For example, when the vertical height increases, the brightness of the LED lights in the inner circle of the shadowless lamp increases, and the brightness of the LED lights in the outer circle decreases to increase the light spot; when the vertical height decreases, the brightness of the LED lights in the inner circle of the shadowless lamp decreases, and the brightness of the LED lights in the outer circle increases to reduce the light spot, thereby ensuring that the light spot size remains unchanged before and after the vertical height changes.

[0041] Specifically, the system also includes: a surface-mounted control panel for displaying light spot data.

[0042] Specifically, the laser ranging sensor detects the target distance through infrared laser pulses and combines with a single photon avalanche diode receiving array to ensure ranging accuracy in complex environments.

[0043] Specifically, the model of the laser ranging sensor is VL53L1X laser sensor.

[0044] Specifically, the angle sensor is mounted on a main control board, and the main control board is parallel to the lamp surface of the shadowless lamp.

[0045] Specifically, the algorithm module is arranged on the main control board.

[0046] Example 2

[0047] This embodiment provides a shadowless light spot adjustment method, which is implemented based on the shadowless light spot adjustment system provided in Example 1. The specific process and control principle are as follows:

[0048] like Figure 1 and Figure 2As shown, the system first completes initialization. When the height position of the surgical lamp changes, the laser ranging sensor automatically detects the current linear height of the shadowless lamp surface and sends the linear height data to the driver board. The driver board then forwards the data to the main control board. After receiving the linear height data, the main control board obtains the angle information between the current lamp head and the ground through the angle sensor, and calculates the vertical height of the shadowless lamp from the ground based on this. The main control board then inputs the vertical height data into the algorithm to calculate the appropriate light spot parameters. After the calculation is completed, the light spot parameters will be sent to each driver board to adjust the brightness ratio of each group of LED lights, thereby modifying the light spot size and completing a complete system process for automatically adjusting the light spot. This system is also equipped with a surface-mounted control board for displaying the adjusted light spot data. To further improve the measurement accuracy of the angle sensor, the main control board where the angle sensor is located is installed and fixed parallel to the light surface of the shadowless lamp.

[0049] Selection of laser ranging sensor:

[0050] This application uses the VL53L1X sensor, which uses an infrared laser to emit periodic laser pulses. These laser pulses are reflected by the target object and return to the sensor. The sensor's photodetector detects these reflected photons and converts them into electrical signals. Timing and data processing electronics record the time interval between the emission of the laser pulse and the receipt of the return signal (i.e., the time of flight t).

[0051] The target distance can be calculated using the speed of light (c) and the time of flight (t). This technology offers high precision, high speed, and strong anti-interference capabilities, enabling stable ranging performance in complex environments. The VL53L1X sensor uses a 940nm invisible laser (Class 1) combined with a SPAD (single-photon avalanche diode) receiving array to achieve optimal ranging performance in a variety of lighting conditions.

[0052] Example 3

[0053] This embodiment provides a shadowless lamp, including the shadowless lamp light spot adjustment system provided in Example 1.

[0054] The application and advantages of the laser ranging sensor used in the present invention are mainly reflected in the following aspects:

[0055] 1. Small size: The laser ranging device has the characteristics of small size, easy installation and use, and can be easily integrated into equipment such as surgical lights.

[0056] 2. High efficiency and high precision: The laser ranging device has the characteristics of fast data acquisition and processing capabilities, and can provide real-time feedback of measurement results. It can achieve ranging at relatively low dissipated power, with an accurate measurement range of up to 400 cm and an accuracy of ±1 cm.

[0057] 3. High stability and strong anti-interference performance: The laser has good directionality and monochromaticity. Coupled with the physical infrared filter and optical elements, it can achieve optimal ranging performance under various ambient lighting conditions. Absolute distance measurement can be performed regardless of the target color and reflectivity.

[0058] The shadowless light spot adjustment system, method, and shadowless lamp provided by the present invention can automatically detect distance changes and adjust the light spot to the appropriate target lighting position when the height position of the shadowless lamp changes, always keeping the light spot size accurately focused on the target area, ensuring that the clinical lighting effect is completely consistent with the laboratory test effect. In addition, the shadowless light spot adjustment system, method, and shadowless lamp provided by the present invention also have the following advantages:

[0059] 1. Using laser ranging sensor, it has the characteristics of low cost, small size, high efficiency and high precision;

[0060] 2. Cooperate with angle sensor and laser distance sensor to realize accurate calculation of vertical height of lamp head;

[0061] 3. It has automatic detection and automatic adjustment functions, which significantly improves the convenience of use and the stability of lighting effects.

[0062] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A shadowless light spot adjustment system, comprising: Laser distance sensor, used to detect the straight-line height between the shadowless lamp surface and the ground; Angle sensor, used to detect the angle between the shadowless lamp head and the ground; A main control board is connected to the laser distance sensor and the angle sensor, and is used to receive straight line height information and angle information, and calculate the vertical height of the shadowless lamp to the ground based on the straight line height information and angle information; Algorithm module for calculating suitable spot parameters based on vertical height; and The driver board is connected to the main control board, and is used to receive the light spot parameters and adjust the brightness ratio of each group of LED lights in the shadowless lamp based on the light spot parameters, thereby realizing automatic adjustment of the light spot size.

2. The shadowless light spot adjustment system according to claim 1, characterized in that: Also includes: Surface mounted control panel, used to display spot data.

3. The shadowless light spot adjustment system according to claim 1, characterized in that: The laser ranging sensor detects the target distance through infrared laser pulses and combines with a single photon avalanche diode receiving array to ensure ranging accuracy in complex environments.

4. The shadowless light spot adjustment system according to claim 1, characterized in that: The model of the laser distance measuring sensor is VL53L1X laser sensor.

5. The shadowless light spot adjustment system according to claim 1, characterized in that: The angle sensor is mounted on a main control board, and the main control board is parallel to the lamp surface of the shadowless lamp.

6. The shadowless light spot adjustment system according to claim 1, characterized in that: The algorithm module is arranged on the main control board.

7. The shadowless light spot adjustment system according to claim 1, characterized in that: The algorithm module reads the vertical height data at preset intervals, thereby monitoring the distance from the shadowless lamp to the illumination target in real time; when the algorithm module detects a change in the vertical height data, the algorithm module calculates the light spot parameters based on the difference between the current vertical height and the previous vertical height; the driving board adjusts the brightness of the LED lights in the inner circle and / or the brightness of the LED lights in the outer circle of the shadowless lamp according to the light spot parameters to change the light spot size, ensure that the light spot size remains unchanged before and after the vertical height changes, and realize automatic adjustment of the light spot size.

8. The shadowless light spot adjustment system according to claim 7, characterized in that: When the vertical height increases, the brightness of the LED lights in the inner circle of the shadowless lamp increases, and the brightness of the LED lights in the outer circle decreases to increase the light spot; when the vertical height decreases, the brightness of the LED lights in the inner circle of the shadowless lamp decreases, and the brightness of the LED lights in the outer circle increases to reduce the light spot, thereby ensuring that the light spot size remains unchanged before and after the vertical height changes.

9. A shadowless light spot adjustment method, implemented based on the shadowless light spot adjustment system according to any one of claims 1 to 8, comprising: The straight-line height between the shadowless lamp surface and the ground is detected by the laser distance sensor; The angle between the shadowless lamp head and the ground is detected by the angle sensor; The main control board receives the straight line height information and the angle information, and calculates the vertical height of the shadowless lamp to the ground based on the straight line height information and the angle information; the algorithm module calculates the appropriate spot parameters based on the vertical height; the driving board receives the spot parameters, and adjusts the brightness ratio of each group of LED lights in the shadowless lamp based on the spot parameters, thereby realizing automatic adjustment of the spot size.

10. A shadowless lamp, characterized in that: The shadowless light spot adjustment system comprises the system described in any one of claims 1 to 8.

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