An intelligent pupillometry device

Abstract

The utility model provides an intelligent pupil measuring device, including tubular housing, the rear cover and annular front cover are equipped with respectively in both ends of shell, be equipped with circuit board, COMS image sensor, optical lens group and battery compartment in the shell, be equipped with display module on the shell, be equipped with two alignment indicating lamp on the front cover, be equipped with button module on the rear cover, button module, COMS image sensor, alignment indicating lamp, battery compartment and display module are linked with circuit board, the imaging direction of COMS image sensor is towards the front cover, optical lens group sets up between COMS image sensor and the front cover, the light of two alignment indicating lamp intersection emits. The utility model discloses be used to solve the problem of existing pupil measurement low efficiency, delay rescue time and exist error.

Description

Technical Field

[0001] This utility model relates to an intelligent pupil measurement device. Background Technology

[0002] Currently, pupil measurement mainly relies on pupil ruler comparison or image comparison methods. For example, the high-precision pupil measuring ruler disclosed in patent "CN203074672 U" requires alternating use with a flashlight, making the operation cumbersome and taking more than 10 seconds per measurement, which can easily delay the judgment of the condition in emergency scenarios. On the other hand, the image comparison method shown in design patent "CN 304897894 S" requires medical personnel to compare the scale with their naked eyes, which is significantly affected by subjective judgment, and the measurement error generally exceeds ±0.5mm, which may lead to misdiagnosis or missed diagnosis of intracranial lesions, drug poisoning, and other conditions. In addition, existing methods require physical contact with patients or close-range operation, posing a risk of cross-infection, and lack dynamic functional assessment methods, failing to meet the clinical need for rapid and accurate pupil measurement. Utility Model Content

[0003] The purpose of this invention is to provide an intelligent pupil measurement device to solve the problems of inefficiency, delay in rescue time, and errors in existing pupil measurement methods.

[0004] To solve the above problems, the technical solution of this utility model is as follows: An intelligent pupil measurement device includes a tubular housing with a rear cover and an annular front cover mounted at both ends. Inside the housing are a circuit board, a CMOS image sensor, an optical lens assembly, and a battery compartment. A display module is mounted on the housing. Two alignment indicator lights are mounted on the front cover, and a button module is mounted on the rear cover. The button module, CMOS image sensor, alignment indicator lights, battery compartment, and display module are connected to the circuit board. The CMOS image sensor's imaging direction faces the front cover. The optical lens assembly is positioned between the CMOS image sensor and the front cover. The light emitted by the two alignment indicator lights intersects.

[0005] Furthermore, the circuit board includes a PCB board, on which a main controller, a pupil recognition algorithm chip, a display driver circuit, an indicator light driver circuit, and a button interface circuit are provided. The button module is connected to the input terminal of the main controller through the button interface circuit. The output terminal of the main controller is connected to the display module and the alignment indicator light through the display driver circuit and the indicator light driver circuit, respectively. The CMOS image sensor is connected to the main controller through the pupil recognition algorithm chip.

[0006] Furthermore, multiple LED lights are installed inside the front cover, with each LED light arranged in an array around the axis of the front cover, and the LED lights are connected to a circuit board.

[0007] Furthermore, the button module includes a power button and a reset button.

[0008] Furthermore, the display module includes two 7-segment LED displays.

[0009] Furthermore, “L” and “R” markings are respectively placed on one side of the two 7-segment LED displays.

[0010] Furthermore, the circuit board also includes a charging module connected to the battery compartment, and a charging port is provided on the back cover, which is connected to the charging module.

[0011] Furthermore, a transparent lens is installed on the front cover.

[0012] The beneficial effects of this utility model are as follows: 1. By using a fixed-focal-length optical lens group and pixel calibration technology of a CMOS image sensor (1 pixel = 0.1 mm), combined with edge detection and contour calculation of a pupil recognition algorithm chip, the measurement error can be controlled within ±0.2 mm, which is more than 60% more accurate than traditional methods, providing reliable data support for the diagnosis of neurological diseases and ophthalmic emergencies. 2. Innovative positioning method: The integrated optical alignment system achieves rapid distance calibration through two intersecting laser beams (the focal distance is reached when the beams overlap). The entire process of a single measurement takes less than 5 seconds, eliminating the need for repeated adjustments to the device position. It is especially suitable for time-sensitive scenarios such as emergency rooms and intensive care units, shortening the pre-rescue assessment time.

[0013] 3. The measurement distance is determined by the intersection of the light emitted by two alignment indicator lights, eliminating the need for physical contact with the patient's eyes, effectively avoiding the risk of cross-infection and improving the safety of use. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the main structure of this utility model. Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 3 This is a three-dimensional structural diagram of the present invention. Figure 4 This is a three-dimensional structural diagram of the present invention. Figure 5 This is a schematic diagram of the present invention. Figure 6 This is a schematic diagram of the present invention. Figure 7 This is a schematic diagram of the present invention. Figure 8 This is the circuit diagram of this utility model.

[0015] In the diagram: 1. Back cover; 2. Label; 3. Display module; 4. Tubular housing; 5. Circular front cover; 6. Alignment indicator light; 7. Transparent lens; 8. LED light; 9. Optical lens group; 10. CMOS image sensor; 11. Circuit board; 12. Battery compartment; 13. Charging port; 14. Power button; 15. Reset button; 16. Battery; 17. Charging module; 18. Light source; 19. Test board. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 4 As shown, an intelligent pupil measurement device includes a tubular housing 4 made of medical-grade plastic. A rear cover 1 and a ring-shaped front cover 5 are respectively fitted to both ends of the housing. Inside the housing 4 are a circuit board 11, a CMOS image sensor 10 (e.g., OV7670), an optical lens group 9, and a battery compartment 12. A display module 3 is mounted on the housing 4, and two alignment indicator lights 6 are mounted on the front cover 5. These alignment indicator lights 6 are laser lights (e.g., a 780nm near-infrared semiconductor laser generator, which is a Class...). The 2M laser, which does not cause eye damage when viewed directly for short periods, is suitable for alignment applications in medical devices. A button module is located on the back cover 1. The button module, CMOS image sensor 10, alignment indicator lights 6, battery compartment 12, and display module 3 are connected to the circuit board 11. The imaging direction of the CMOS image sensor 10 faces the front cover 5. An optical lens group 9 is positioned between the CMOS image sensor 10 and the front cover 5. The optical lens group 9 is used to accurately focus light onto the photosensitive surface of the CMOS sensor, thereby achieving high-quality image acquisition. The light emitted by the two alignment indicator lights 6 intersects; the alignment indicator lights 6 are used for focusing the CMOS sensor. Figure 5 As shown in the figure, the light emitted by the alignment indicator 6 illuminates the front, middle and rear test boards in sequence. Only the test board in the middle position allows the light emitted by the alignment indicator 6 to intersect at a single point. The distance from the middle test board to the alignment indicator 6 is the focal length of the CMOS sensor.

[0018] Furthermore, the circuit board 11 includes a PCB board, on which are mounted a main controller (e.g., STM32F103C8T6), a pupil recognition algorithm chip (e.g., Wuhan Hongshi QX8001), a display driver circuit (e.g., 74HC595 8-bit shift register), an indicator light driver circuit, and a button interface circuit. The button module is connected to the input terminal of the main controller through the button interface circuit. The output terminal of the main controller is connected to the display module 3 and the alignment indicator light 6 through the display driver circuit and the indicator light driver circuit, respectively. The CMOS image sensor 10 is connected to the main controller through the pupil recognition algorithm chip. Through the different functional modules on the circuit board (such as the display driver circuit, indicator light driver circuit, button interface circuit, etc.), efficient collaborative operation of each component is achieved. Furthermore, multiple LEDs 8 are installed inside the front cover 5, and each LED 8 is arranged in an array around the axis of the front cover 5. The LEDs 8 are connected to the circuit board 11. When the light is dim, multiple LEDs 8 illuminate the pupil, which can provide multi-angle supplementary light, weaken the shadows on the surface texture of the iris, and make the pupil edge clearer, which is suitable for the pupil recognition algorithm chip to accurately identify the boundary.

[0019] Furthermore, the button module includes a power on / off button 14 and a reset button 15. The reset button 15 is used to reset the device to facilitate pupil measurement for the next patient. In use, a long press of the power on / off button 14 (e.g., 3 seconds) turns the device on or off; a short press of the power on / off button 14 turns the LED light 8 on or off.

[0020] Furthermore, the display module 3 includes two 7-segment LED displays (e.g., LTS-543RHR). The two 7-segment LED displays can clearly display the pupil size data of the left and right eyes, making it easy for medical staff to quickly read and record.

[0021] Furthermore, "L" and "R" markings are provided on one side of each of the two 7-segment LED displays. The "L" and "R" markings are used to indicate the pupil size data of the left and right eyes, respectively, clearly distinguishing the measurement results of the left and right eyes and avoiding data confusion.

[0022] Furthermore, the circuit board 11 also includes a charging module 17 connected to the battery compartment 12, and a charging port 13 is provided on the rear cover 1, which is connected to the charging module 17. The battery compartment 12 contains an 1860 battery 16, which is a rechargeable battery that powers the entire device. The charging module 17 and the charging port 13 are used to charge the battery 16.

[0023] Furthermore, a transparent lens 7 is installed on the front cover 5. The transparent lens 7 is used to protect the optical lens group 9.

[0024] The working process of this utility model is as follows: I. Optical alignment and image acquisition: 1. Laser Alignment and Focusing: Two alignment indicator lights (laser lights) on the front cover emit two beams of light, illuminating the subject's forehead at a fixed angle. The device is moved up and down; when the two beams converge into a single point on the forehead, it indicates that the distance between the device and the subject is exactly the focal distance of the CMOS image sensor (pre-calibrated using the optical lens group). Principle: Utilizing the similarity of triangles, the object distance is determined by the intersection of the beams, ensuring the pupil is within the lens's depth of field. 2. Image Acquisition: The CMOS image sensor images the focused pupil through an optical lens group. The optical lens group converges the light and corrects aberrations, ensuring that the pupil edge is clearly projected onto the sensor's photosensitive surface. LEDs (multiple rings arranged inside the front cover) provide supplemental lighting when light is insufficient, and multi-angle illumination weakens iris shadows and improves image contrast. II. Signal Processing and Algorithm Calculation: 1. Image data transmission: The pupil image acquired by the sensor is transmitted to the pupil recognition algorithm chip (such as Wuhan Hongshi QX8001) in the form of a digital signal. The chip has a built-in edge detection algorithm to extract the pupil outline and calculate the pixel ratio. 2. Size Conversion: Convert the number of pixels to the actual size using pixel calibration: Calculation formula: D = N xk (k=0.1mm / pixel, N is the number of pixels occupied by the pupil image, D is the pupil diameter), pre-calibrated using pixel-size mapping under standard object distance.

[0025] 3. Data processing and output: The calculation results are transmitted to the main controller. The main controller displays the pupil size of the left and right eyes on two 7-segment LED displays through the display driver circuit. The "L" and "R" markings next to the displays distinguish the data of the left and right eyes. III. Electromechanical Control and Power Management 1. Button Interaction: Power On / Off Button: Press and hold for 3 seconds to power on / off; short press to turn the LED light on / off. Reset Button: Resets system parameters and clears historical data for continuous measurement of different patients. 2. Power supply and charging: The battery compartment has a built-in 18650 rechargeable lithium battery, which is replenished through a charging module (such as TP4056) and a charging port on the back cover. The circuit board integrates a power management circuit to ensure stable power supply to each module.

[0026] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. An intelligent pupil measuring device, characterized in that: The device includes a tubular housing with a rear cover and a ring-shaped front cover at each end. Inside the housing are a circuit board, a CMOS image sensor, an optical lens assembly, and a battery compartment. A display module is located on the housing. Two alignment indicator lights are located on the front cover, and a button module is located on the rear cover. The button module, CMOS image sensor, alignment indicator lights, battery compartment, and display module are connected to the circuit board. The CMOS image sensor's imaging direction is towards the front cover. The optical lens assembly is positioned between the CMOS image sensor and the front cover. The light rays emitted by the two alignment indicator lights intersect.

2. The intelligent pupil measuring device according to claim 1, characterized in that: The circuit board includes a PCB board, on which a main controller, a pupil recognition algorithm chip, a display driver circuit, an indicator light driver circuit, and a button interface circuit are provided. The button module is connected to the input terminal of the main controller through the button interface circuit. The output terminal of the main controller is connected to the display module and the alignment indicator light through the display driver circuit and the indicator light driver circuit, respectively. The CMOS image sensor is connected to the main controller through the pupil recognition algorithm chip.

3. The intelligent pupil measuring device according to claim 2, characterized in that: Multiple LED lights are installed inside the front cover, and each LED light is arranged in an array around the axis of the front cover. The LED lights are connected to a circuit board.

4. The intelligent pupil measuring device according to claim 2 or 3, characterized in that: The button module includes a power button and a reset button.

5. The intelligent pupil measuring device according to claim 2 or 3, characterized in that: The display module includes two 7-segment LED displays.

6. The intelligent pupil measuring device according to claim 5, characterized in that: The two 7-segment LED displays are marked with "L" and "R" on one side respectively.

7. The intelligent pupil measuring device according to claim 2 or 3, characterized in that: The circuit board also includes a charging module connected to the battery compartment, and a charging port is provided on the back cover, which is connected to the charging module.

8. The intelligent pupil measuring device according to claim 2 or 3, characterized in that: A transparent lens is installed on the front cover.

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