Multi-parameter measuring device of functional near infrared spectrum equipment

Abstract

The utility model discloses a multi-parameter measuring device for functional near infrared spectrum equipment, which comprises a light attenuation module, a light power meter, a spectrograph and a PC (Personal Computer), the light attenuation module is respectively connected with the light power meter and the spectrograph, and the light power meter and the spectrograph are connected with the PC; the light attenuation module comprises a cuboid box, an electric control shutter and a light attenuator; wherein the electric control shutter is screwed into an internal thread on the inner side face of the base through an external thread to be connected with the cuboid box, a controller of the electric control shutter is connected with a shutter window through a shutter release, an optical attenuator slides into the cuboid box through a second trapezoidal notch and a guide rail, and the light attenuation amount of the optical attenuator is adjustable. A movable plate on the cuboid box is fixed through a screw and clamps the optical attenuator; according to the measuring device, the multi-parameter measurement of the functional near infrared spectrum equipment can be realized by replacing the optical filter on the optical attenuator and controlling the opening and closing of the electric control door, and the measuring device has the advantages of good stability, high integration level and simplicity in operation.

Description

Technical Field

[0001] This utility model relates to a functional near-infrared spectroscopy equipment parameter measuring device, belonging to the field of medical equipment testing. Background Technology

[0002] Functional near-infrared spectroscopy (fNIRS) is an optical imaging device used to measure changes in blood oxygenation in the cerebral cortex, thereby indirectly reflecting brain activity. A typical fNIRS system consists of a light source system, a detector system, a data acquisition system, and data analysis software. The light source system emits near-infrared light (700–1000 nm) that penetrates biological tissue. The detector system receives the transmitted or reflected light signals. The data acquisition system converts the light signals into electrical signals and collects them. The data analysis software processes and analyzes the acquired data. In recent years, fNIRS has been widely used in cognitive neuroscience, psychology, and clinical medicine. It can be used to study cognitive processes, emotional responses, and motor control in the brain, and also for the diagnosis and assessment of brain injuries and neurodegenerative diseases, providing an effective means for non-invasive brain function research and clinical diagnosis.

[0003] Because medical devices involve human life and safety, functional near-infrared spectroscopy devices require a series of tests before entering the market to ensure their safety and performance. my country's "Regulations on the Supervision and Administration of Medical Devices" and "Measures for the Registration and Filing of Medical Devices" clearly stipulate that medical device registration or filing applications must be inspected according to product technical requirements. For functional near-infrared spectroscopy devices, the national standard GB 9706.271-2022 "Medical Electrical Equipment - Part 2-71: Particular Requirements for Basic Safety and Basic Performance of Functional Near-Infrared Spectroscopy (NIRS) Devices" specifies that parameters such as the average optical power, peak wavelength, full width at half maximum (FWHM) of the spectral power distribution, and response time of the output light of functional near-infrared spectroscopy devices must be tested to assess their safety. Specifically, the signal stability test requires the functional near-infrared spectroscopy device to have an optical loss value greater than 40 dB. Data acquisition accuracy testing, response time testing, and signal-to-noise ratio testing require the device to have variable optical loss capability and good stability.

[0004] Currently, domestic devices used for detecting functional near-infrared spectroscopy equipment have limited functionality. Patent application number 202411216311.1, entitled "Invention Patent for a Method and Device for Detecting the Optical Transmission Pathway in Near-Infrared Brain Functional Imaging Equipment," can be used to detect the optical transmission pathway in functional near-infrared spectroscopy equipment. However, in actual equipment testing, due to the large number of performance parameters to be measured, the operation of detecting them separately using a single method is complex, and data integration is impossible. Therefore, a device capable of multi-parameter measurement of functional near-infrared spectroscopy equipment is needed to improve its safety assessment system. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a device for multi-parameter detection of functional near-infrared spectroscopy equipment. This device integrates the detection of functional near-infrared spectroscopy equipment parameters, is simple to operate, and has good stability.

[0006] The technical solution adopted in this utility model is: a multi-parameter measurement device for a functional near-infrared spectroscopy device, including a light attenuation module (1), an optical power meter (2), a spectrometer (3), and a PC (4), wherein the light attenuation module (1) is connected to the optical power meter (2) and the spectrometer (3) respectively; the optical power meter (2) and the spectrometer (3) are connected to the PC (4); the light attenuation module (1) includes a cuboid box (5), an electronically controlled shutter (6), and a light attenuator (7); the cuboid box (5) includes a base (8) and a movable plate (9), the base (8) is a cuboid slot with openings on the top and left, the right side (8-1) of the base is provided with an output optical electrode interface (10), and the front side wall (8-2) of the base is provided with The base has a first long slot (11), a second long slot (12) on the rear side wall (8-3), an internal thread (13) on the side wall of the central circular groove on the inner side (8-6) of the base, an inverted trapezoidal guide rail (14) integral with the base (8) on the inner bottom surface (8-5), an input optical interface (15) on the front surface (9-1) of the movable plate, a screw hole (17) on the upper side of the movable plate (9), and a first trapezoidal slot (16) on the bottom (9-2) of the movable plate; the electronically controlled shutter (6) includes a controller (6-1), a shutter window (6-2), a shutter cable (6-3), and an external thread (6-4). The controller (6-1) and the shutter window (6-2) are connected by the shutter cable (6-3). The electronic shutter (6) is screwed into the internal thread (13) of the inner side (8-6) of the base via the external thread (6-4) and connected to the base (8); the optical attenuator (7) includes a body mold (18), a first filter (19-1), a second filter (19-2), a third filter (19-3), and a fourth filter (19-4). The upper surface (18-1) of the body mold is provided with a first cuboid slot (20-1), a second cuboid slot (20-2), a third cuboid slot (20-3), and a fourth cuboid slot (20-4). The body mold (18) is provided with a hollow light-transmitting hole (21). The bottom (18-2) of the body mold is provided with a second trapezoidal groove (22). The first filter (19-1) is provided with a first circular... The first filter (19-1) has a circular light-transmitting opening (23-1), the second filter (19-2) has a second circular light-transmitting opening (23-2), the third filter (19-3) has a third circular light-transmitting opening (23-3), and the fourth filter (19-4) has a fourth circular light-transmitting opening (23-4); the first filter (19-1) is embedded inside the body mold (18) through the first cuboid slot (20-1), the second filter (19-2) is embedded inside the body mold (18) through the second cuboid slot (20-2), the third filter (19-3) is embedded inside the body mold (18) through the third cuboid slot (20-3), and the fourth filter (19-4) is embedded inside the body mold (18) through the fourth cuboid slot (20-4);The optical attenuator (7) slides into the base (8) through the second trapezoidal slot (22) and the guide rail (14). The movable plate (9) slides into the base (8) through the first trapezoidal slot (16) and the guide rail (14). The movable plate (9) is fixed in position by screws and clamps the optical attenuator (7). The output optical electrode interface (10), the electronic shutter (6), the hollow light-transmitting hole (21), the first circular light-transmitting hole (23-1), the second circular light-transmitting hole (23-2), the third circular light-transmitting hole (23-3), and the fourth circular light-transmitting hole (23-4) are placed coaxially.

[0007] The outer diameter of the output optical interface (10) and the input optical interface (15) is 10 mm and the inner diameter is 8 mm.

[0008] The base (8) is 100mm long, 90mm wide, and 80mm high. The front sidewall (8-2) and rear sidewall (8-3) of the base are 10mm thick. The inner bottom surface (8-5) of the base is 88mm long, 70mm wide, and 10mm thick.

[0009] The first long slot (11) and the second long slot (12) are 78mm long and 6mm wide. Their center is 68mm away from the right side (8-1) of the base and 6mm away from the top (8-4) of the base.

[0010] The electronically controlled shutter (6) has a shutter response time of less than 1ms. The shutter window (6-2) is a rectangle with a length of 20mm and a width of 10mm. It is controlled by the controller (6-1) and can switch between two states: fully open and fully closed.

[0011] The upper surface of the guide rail (14) is 88mm long and 20mm wide, and the vertical distance between it and the inner bottom surface (8-5) of the base is 3mm. The angle between the two inclined surfaces and the inner bottom surface (8-5) of the cuboid base is 45°.

[0012] The movable plate (9) is 10mm thick, and the front surface (9-1) of the movable plate is a square with a side length of 70mm. The screw hole (17) is 6mm away from the upper surface of the movable plate.

[0013] The main body of the phantom (18) is made of polyoxymethylene material, with a length of 70mm, a width of 70mm, and a height of 70mm. The diameter of the hollow light-transmitting hole (21) inside the phantom (18) is 30mm.

[0014] The optical attenuator (7) has an overall optical attenuation of ≥40dB.

[0015] The first cuboid slot (20-1), the second cuboid slot (20-2), the third cuboid slot (20-3), and the fourth cuboid slot (20-4) are all 40mm long, 4mm wide, and 60mm deep. Each cuboid slot is evenly spaced with a spacing of 10mm between them.

[0016] The diameter of the first circular light-transmitting opening (23-1), the second circular light-transmitting opening (23-2), the third circular light-transmitting opening (23-3), and the fourth circular light-transmitting opening (23-4) is 20mm.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The optical attenuation module is composed of a phantom and a detachable filter. The optical attenuation can be changed by replacing the filter to meet the optical loss required for performance testing of functional near-infrared spectroscopy phantoms. It effectively integrates the detection of performance indicators such as hemoglobin changes, signal stability, response time and signal-to-noise ratio, and has the ability to control optical loss and stable characteristics.

[0019] 2. By adjusting the position of the movable plate, different sizes of mannequins can be fixed, allowing for the removal and replacement of the mannequins and facilitating cleaning.

[0020] 3. The mounting base module is equipped with a slide rail, which allows the movable plate and the model to slide left and right, and the installation and disassembly are convenient and easy to operate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a multi-parameter measurement device for a functional near-infrared spectroscopy apparatus according to this utility model;

[0022] Figure 2 This is a schematic diagram of the optical attenuation module of this utility model;

[0023] Figure 3 This is a schematic diagram of the rectangular box structure of this utility model;

[0024] Figure 4 This is a frontal view of the base of this utility model;

[0025] Figure 5 This is a side view schematic diagram of the base of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the movable plate of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the electronically controlled shutter of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the optical attenuator of this utility model;

[0029] Figure 9 This is a schematic diagram of the phantom of this utility model;

[0030] Figure 10 This is a schematic diagram of the filter of this utility model;

[0031] In the diagram: 1: Optical attenuation module; 2: Optical power meter; 3: Spectrometer; 4: PC; 5: Cuboid box; 6: Electronic shutter; 6-1: Controller; 6-2: Shutter window; 6-3: Shutter cable; 6-4: External thread; 7: Optical attenuator; 8: Base; 8-1: Right side of base; 8-2: Front side wall of base; 8-3: Rear side wall of base; 8-4: Top of base; 8-5: Inner bottom surface of base; 8-6: Inner side surface of base; 9: Movable plate; 9-1: Front surface of movable plate; 9-2: Bottom of movable plate; 10: Output optical electrode interface; 11: First long slot; 12: Second long slot; 13: Internal thread; 14: Guide rail; 5: Input optical interface; 16: First trapezoidal slot; 17: Screw hole; 18: Model; 18-1: Upper surface of model; 18-2: Bottom of model; 19-1: First filter; 19-2: Second filter; 19-3: Third filter; 19-4: Fourth filter; 20-1: First cuboid slot; 20-2: Second cuboid slot; 20-3: Third cuboid slot; 20-4: Fourth cuboid slot; 21: Hollow light-transmitting hole; 22: Second trapezoidal slot; 23-1: First circular light-transmitting opening; 23-2: Second circular light-transmitting opening; 23-3: Third circular light-transmitting opening; 23-4: Fourth circular light-transmitting opening. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below with reference to the structural schematic diagram.

[0033] like Figure 1 As shown, a multi-parameter measurement device for a functional near-infrared spectroscopy device includes an optical attenuation module 1, an optical power meter 2, a spectrometer 3, and a PC 4. The optical attenuation module 1 is connected to the optical power meter 2 and the spectrometer 3 via optical fibers. The optical power meter 2 and the spectrometer 3 are connected to the PC 4 via USB cables. The spectral response range of the spectrometer 5 includes at least 500-1000 nm.

[0034] like Figure 2-7As shown, the optical attenuation module 1 includes a cuboid box 5, an electronic shutter 6, and an optical attenuator 7. The cuboid box 5 includes a base 8 and a movable plate 9. The base 8 is a cuboid slot with openings on the top and left side. The base 8 is 100mm long, 90mm wide, and 80mm high. The front side 8-2 and rear side 8-3 of the base are 10mm thick. The inner bottom surface 8-5 of the base is 88mm long, 70mm wide, and 10mm thick. The movable plate 9 is 10mm thick. The front surface 9-1 of the movable plate is a square with a side length of 70mm. The right side 8-1 of the base is provided with an output optical electrode interface 10 with an outer diameter of 10mm and an inner diameter of 8mm. The front side wall 8-2 of the base is provided with a first long slot 11, and the rear side wall 8-3 of the base is provided with a second long slot 12. The first long slot 11 and the second long slot 12 are 78mm long and 6mm wide. Their centers are 68mm away from the right side 8-1 of the base and 6mm away from the top 8-4 of the base. The inner side of the base 8-6 has a central circular groove with an internal thread 13 on its side wall. The inner bottom surface 8-5 of the base has an inverted trapezoidal guide rail 14 integrated with the base 8. The upper surface of the guide rail 14 is 88mm long and 20mm wide, and the vertical distance between it and the inner bottom surface 8-5 of the base is 3mm. The angle between the two inclined surfaces and the inner bottom surface 8-5 of the cuboid base is 45°. The front surface 9-1 of the movable plate has an input optical interface 15 with an outer diameter of 10mm and an inner diameter of 8mm. The upper side of the movable plate 9 has a screw hole 17, which is 6mm away from the upper surface of the movable plate. The bottom 9-2 of the movable plate has a first trapezoidal groove 1. 6; The movable plate 9 slides into the base 8 through the first trapezoidal slot 16 and the guide rail 14, and the movable plate 9 is fixed in position by screws; The electronically controlled shutter 6 includes a controller 6-1, a shutter window 6-2, a shutter cable 6-3, and an external thread 6-4. The controller 6-1 and the shutter window 6-2 are connected through the shutter cable 6-3. The electronically controlled shutter 6 is connected to the base 8 through the internal thread 13 and the external thread 6-4. The shutter response time is less than 1ms. The shutter window 6-2 is a rectangle with a length of 20mm and a width of 10mm. It is controlled by the controller 6-1 and can switch between two states: fully open and fully closed.

[0035] like Figure 8-10As shown, the optical attenuator 7 includes a phantom 18, a first filter 19-1, a second filter 19-2, a third filter 19-3, and a fourth filter 19-4. The main body of the phantom 18 is made of polyoxymethylene material, with a length, width, and height of 70mm. The upper surface 18-1 of the phantom is provided with a first cuboid slot 20-1, a second cuboid slot 20-2, a third cuboid slot 20-3, and a fourth cuboid slot 20-4, each with a length of 40mm and a width of 4mm. The mold has a diameter of 60mm and a depth of 10mm. Each cuboid slot is evenly spaced with a 10mm interval. The mold 18 has a hollow light-transmitting hole 21 with a diameter of 30mm. The bottom 18-2 of the mold has a second trapezoidal slot 22. The first filter 19-1 has a first circular light-transmitting opening 23-1, the second filter 19-2 has a second circular light-transmitting opening 23-2, the third filter 19-3 has a third circular light-transmitting opening 23-3, and the fourth filter 19-4 has a fourth circular light-transmitting opening 23-4. The light-transmitting openings 23-4, the first circular light-transmitting opening 23-1, the second circular light-transmitting opening 23-2, the third circular light-transmitting opening 23-3, and the fourth circular light-transmitting opening 23-4, all have a diameter of 20mm; the first filter 19-1 is embedded into the body mold 18 through the first cuboid slot 20-1, the second filter 19-2 is embedded into the body mold 18 through the second cuboid slot 20-2, and the third filter 19-3 is embedded into the body mold 18 through the third cuboid slot 20-3. The fourth filter 19-4 is embedded inside the body mold 18 through the fourth cuboid slot 20-4; the light attenuator 7 slides into the base 8 through the second trapezoidal slot 22 and the guide rail 14, and the light attenuator 7 is clamped by the movable plate 9 with screws to fix the position; the output light electrode interface 10, the electronic shutter 6, the hollow light-transmitting hole 21, the first circular light-transmitting hole 23-1, the second circular light-transmitting hole 23-2, the third circular light-transmitting hole 23-3, and the fourth circular light-transmitting hole 23-4 are placed coaxially.

[0036] A measurement process for a multi-parameter measurement device applied to a functional near-infrared spectroscopy device: The input optical interface 15 is connected to the emission probe of the device under test (DUT). The light signal emitted by the DUT enters the optical attenuator 7 of the device through the input optical interface 15. The user can select a suitable filter 19 according to the performance indicators to be tested and place it into the cuboid slot 20 on the upper surface 18-1 of the phantom. The position of the movable plate 9 is adjusted to fix the phantom 18. After fixing the movable plate 9 with screws, the parameters are measured. The light signal passes through the optical attenuator 7 and the electronic shutter, and is transmitted to the optical power meter 2 and spectrometer 3 through the optical fiber connected to the output optical interface 10. After the measurement is completed, the measurement data is finally transmitted to the PC 4 for comparison with the calibration values, realizing the evaluation of the performance indicators and safety of the functional near-infrared spectroscopy device. In particular, when measuring the signal response performance of the device, the controller 6-1 in the electronic shutter 6 sends an electrical signal to trigger the electromagnetic coil, thereby quickly controlling the opening and closing of the mechanical blades of the shutter window 6-2, accurately realizing the opening and closing of the optical path in the device to test the signal response characteristics of the DUT.

Claims

1. A multi-parameter measuring device of functional near-infrared spectroscopy equipment, comprising a light attenuation module (1), a light power meter (2), a spectrometer (3) and a PC (4), wherein the light attenuation module (1) is connected with the light power meter (2) and the spectrometer (3) respectively; the light power meter (2) and the spectrometer (3) are connected with the PC (4); characterized in that: The light attenuation module (1) includes a cuboid box (5), an electric control shutter (6) and a light attenuator (7); the cuboid box (5) includes a base (8) and a movable plate (9), the base (8) is a cuboid slot with an opening on the top and the left side, the right side surface (8-1) of the base is provided with an output light pole interface (10), the front side wall (8-2) of the base is provided with a first long slot (11), the back side wall (8-3) of the base is provided with a second long slot (12), the center circular groove side wall of the internal side surface (8-6) of the base is provided with an internal thread (13), the internal bottom surface (8-5) of the base is provided with an inverted trapezoidal guide rail (14) integrated with the base (8), the input light pole interface (15) is arranged on the front surface (9-1) of the movable plate (9), the screw hole (17) is arranged on the upper side of the side surface of the movable plate (9), and the first trapezoidal slot (16) is arranged on the bottom (9-2) of the movable plate (9); the electric control shutter (6) includes a controller (6-1), a shutter window (6-2), a shutter wire (6-3) and an external thread (6-4), the controller (6-1) is connected with the shutter window (6-2) through the shutter wire (6-3), and the electric control shutter (6) is connected with the base (8) by being screwed into the internal thread (13) of the internal side surface (8-6) of the base through the external thread (6-4); the light attenuator (7) includes a phantom (18), a first filter (19-1), a second filter (19-2), a third filter (19-3) and a fourth filter (19-4), the upper surface (18-1) of the phantom is provided with a first cuboid slot (20-1), a second cuboid slot (20-2), a third cuboid slot (20-3) and a fourth cuboid slot (20-4), the phantom (18) is provided with a hollow light transmission hole (21), the bottom (18-2) of the phantom is provided with a second trapezoidal slot (22), the first filter (19-1) is provided with a first circular light transmission port (23-1), the second filter (19-2) is provided with a second circular light transmission port (23-2), the third filter (19-3) is provided with a third circular light transmission port (23-3), and the fourth filter (19-4) is provided with a fourth circular light transmission port (23-4); the first filter (19-1) is embedded in the internal part of the phantom (18) through the first cuboid slot (20-1), the second filter (19-2) is embedded in the internal part of the phantom (18) through the second cuboid slot (20-2), the third filter (19-3) is embedded in the internal part of the phantom (18) through the third cuboid slot (20-3), and the fourth filter (19-4) is embedded in the internal part of the phantom (18) through the fourth cuboid slot (20-4); the light attenuator (7) is slid into the base (8) through the second trapezoidal slot (22) and the guide rail (14), the movable plate (9) is slid into the base (8) through the first trapezoidal slot (16) and the guide rail (14), the movable plate (9) is fixed in position through a screw and clamps the light attenuator (7).The output light pole interface (10), the electrically controlled shutter (6), the hollow light hole (21), the first circular light transmission port (23-1), the second circular light transmission port (23-2), the third circular light transmission port (23-3) and the fourth circular light transmission port (23-4) are coaxially arranged. ​ 2. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The base (8) is 100 mm long, 90 mm wide and 80 mm high. The front side wall (8-2) and the rear side wall (8-3) are 10 mm thick. The internal bottom surface (8-5) is 88 mm long, 70 mm wide and 10 mm thick.

3. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The first long notch (11) and the second long notch (12) are 78 mm long and 6 mm wide. The center of each notch is 68 mm away from the right side wall (8-1) and 6 mm away from the top (8-4).

4. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The electrically controlled shutter (6) has a shutter response time less than 1 ms. The shutter window (6-2) is a rectangle with a length of 20 mm and a width of 10 mm. The shutter window can be controlled by the controller (6-1) to switch between fully open and fully closed states.

5. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The guide rail (14) is 88 mm long and 20 mm wide. The vertical distance between the upper surface of the guide rail and the internal bottom surface (8-5) is 3 mm. The angle between the two inclined surfaces and the internal bottom surface (8-5) is 45°.

6. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The movable plate (9) is 10 mm thick. The front surface (9-1) is a square with a side length of 70 mm. The screw hole (17) is 6 mm away from the upper surface of the movable plate.

7. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The phantom (18) is made of polyoxymethylene material. The main body is 70 mm long, 70 mm wide and 70 mm high. The hollow light passage (21) in the phantom (18) is 30 mm in diameter.

8. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The first cuboid slot (20-1), the second cuboid slot (20-2), the third cuboid slot (20-3) and the fourth cuboid slot (20-4) are all 40 mm long, 4 mm wide and 60 mm deep. Each cuboid slot is equally spaced with a spacing of 10 mm.

9. The multi-parameter measuring apparatus of a functional near-infrared spectroscopy device according to claim 1, wherein, The first circular light transmission port (23-1), the second circular light transmission port (23-2), the third circular light transmission port (23-3) and the fourth circular light transmission port (23-4) are all 20 mm in diameter.

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