Testing device and method for aging degree of nitride phosphor

Abstract

The present application relates to a test device and method for the aging degree of nitride phosphors, belonging to the technical field of preventing the contamination of optical device components. The test device for the aging degree of nitride phosphors includes a spherical shell, a light inlet and a light outlet, and the light inlet and the light outlet are respectively arranged on the spherical shell; a flap is connected to the light outlet; a plurality of grids are evenly distributed on the flap; a photoelectric element is arranged in the grid, and the photoelectric element is used to detect the change in light flux. A cleaning box is fixedly arranged on the top of the spherical shell; a support pipe is fixedly arranged on the top of the cleaning box; a support rod is slidably arranged vertically in the support pipe; a lead screw is fixedly connected to the bottom end of the support rod; a connecting pipe is rotatably arranged at the bottom end of the lead screw; a nozzle is fixedly connected to the bottom end of the connecting pipe; a transmission wheel is rotatably arranged at the bottom end of the support pipe and is in threaded cooperation with the lead screw. The present application has the effect of automatically positioning the pollution position inside the integrating sphere.

Description

Technical Field

[0001] This application relates to the technical field of preventing contamination of optical device components, and particularly to a test device and method for the aging degree of nitride phosphors. Background Art

[0002] During long-term use, nitride phosphors will age due to factors such as light, heat, and humidity, resulting in a decrease in their luminous efficiency. An integrating sphere is usually used to evaluate the aging degree of phosphors. By placing the phosphor sample to be tested inside the integrating sphere, exciting the phosphor to emit light using a light source, and then measuring its emission spectrum and luminous flux through a spectrometer, the aging degree of the phosphor can be accurately quantified.

[0003] An integrating sphere is usually made of metal or a material with high reflectivity. Its inner surface is coated with a high-reflectivity diffuse reflection coating to ensure uniform distribution of light inside the sphere. One or more inlet ports are opened on the integrating sphere for introducing an excitation light source; at the same time, one or more outlet ports are provided for connecting to a spectrometer or a light detector; and a sample placement area is provided for fixing the phosphor sample to be tested. When the light source irradiates the phosphor sample, the fluorescence emitted by the sample is evenly distributed after multiple reflections inside the integrating sphere and is finally detected by the spectrometer through the outlet port, thus achieving precise measurement of the optical properties of the phosphor.

[0004] During the process of testing nitride phosphors, the reflection coating on the inner peripheral surface of the integrating sphere may be contaminated by phosphor particles or environmental dust, resulting in a decrease in its reflection ability. This contamination will directly affect the accuracy of the test results because the reduction in the reflectivity of the reflection coating will cause light signal loss, thus underestimating the actual luminous performance of the phosphor. Currently, the main method to solve this problem is to manually locate the contamination position and clean it. However, manual operation is time-consuming and inaccurate, especially when the internal space of the integrating sphere is large or the contamination is unevenly distributed. Summary of the Invention

[0005] In order to improve the problem of manually locating the contamination position inside the integrating sphere, this application provides a test device and method for the aging degree of nitride phosphors.

[0006] The test device and method for the aging degree of nitride phosphors provided by this application adopt the following technical solutions:

[0007] A test device for the aging degree of nitride phosphors, comprising:

[0008] A spherical shell, a light inlet and a light outlet, the light inlet and the light outlet are respectively arranged on the spherical shell;

[0009] A flap and a grid, the flap is connected to the light outlet; a plurality of the grids are evenly distributed on the flap;

[0010] A photoelectric element, which is arranged in the grid and is used to detect the change of light flux.

[0011] Optionally, it further includes: a cleaning box and a support pipe, the cleaning box is fixedly arranged on the top of the spherical shell; the support pipe is fixedly arranged on the top of the cleaning box;

[0012] A support rod and a lead screw, the support rod is arranged to slide vertically in the support pipe; the lead screw is fixedly connected to the bottom end of the support rod;

[0013] A connecting pipe and a nozzle, the connecting pipe is rotatably arranged at the bottom end of the lead screw; the nozzle is fixedly connected to the bottom end of the connecting pipe;

[0014] A transmission wheel, which is rotatably arranged at the bottom end of the support pipe and is in threaded cooperation with the lead screw.

[0015] Optionally, an air pipe and a liquid pipe are fixedly connected to the outer peripheral surface of the connecting pipe; an air pump is arranged on the air pipe, and a liquid pump is arranged on the liquid pipe.

[0016] Optionally, a top pipe is fixedly arranged on the top of the cleaning box, and a rotating assembly one is arranged in the top pipe; the rotating assembly one includes:

[0017] A driving wheel, which is rotatably arranged at the bottom end of the top pipe and meshes with the transmission wheel;

[0018] Magnetic parts, several magnetic parts are arranged to slide in the top pipe; several metal sheets are also fixedly arranged in the top pipe; the magnetic parts are electromagnets; after the magnetic parts are energized, they move by magnetically adsorbing the metal sheets;

[0019] A transmission shaft, which is arranged to slide axially along the top pipe in the top pipe, and the transmission shaft moves by magnetically adsorbing with the magnetic parts;

[0020] A rotating shaft, the rotating shaft is fixedly connected to the transmission shaft, and the rotating shaft cooperates with the driving wheel to make the driving wheel rotate.

[0021] Optionally, several spiral protrusions are evenly distributed along the circumferential direction on the outer peripheral surface of the rotating shaft; a transmission hole for passing through the rotating shaft is formed on the driving wheel; several spiral grooves are evenly distributed along the circumferential direction on the inner peripheral surface of the transmission hole, and the spiral protrusions are engaged with the spiral grooves.

[0022] Optionally, a sliding hole is formed at the bottom end of the lead screw, and a rotating assembly two is arranged in the sliding hole; the rotating assembly two has the same structure as the rotating assembly one, and the rotating assembly two is used to drive the connecting pipe to rotate.

[0023] Optionally, magnetic disks are fixedly installed inside the grid, and the magnetic disks are electromagnets; concave holes are evenly distributed on the flap, metal rods are slidably arranged in the concave holes, the magnetic disks are used for magnetically adsorbing the metal rods, a contact switch is arranged between the metal rods and the concave holes, the magnetic member is electrically connected to the contact switch, and the optoelectronic element is electrically connected to the magnetic disks.

[0024] Optionally, the optoelectronic element is connected to the magnetic disk through an amplifier, a comparator, and a relay.

[0025] Optionally, the air pump and the liquid pump are respectively connected to a timer.

[0026] A method for testing the aging degree of a nitride phosphor provided by this application adopts the following technical solution: a testing device for the aging degree of a nitride phosphor is used to remove the pollutants inside the spherical shell.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. This self-cleaning device can achieve automatic cleaning of the inner wall of the spherical shell. When a certain reflection area is contaminated and the light reflection intensity weakens, the photodiode detects that the light flux is lower than the preset value, triggering the contact switch to close, and then starting the magnetic member to control the rotation and descent of the nozzle, so that it accurately aligns with the contaminated area for cleaning. This automated cleaning mechanism improves the cleaning efficiency while reducing manual intervention, ensuring the continuous cleanliness of the test environment and the accuracy of test results.

[0029] 2. This self-cleaning device can not only automatically clean the inner wall of the spherical shell, but also intelligently control cleaning and drying. The start and stop times of the liquid pump and the air pump are controlled by a timer to ensure that the cleaning liquid and the drying gas can be sprayed in sequence, thereby improving the cleaning efficiency.

[0030] 3. By dividing the reflection coating inside the spherical shell into multiple reflection areas and corresponding them to the grid one by one, this device realizes precise positioning of the contaminated area. When the light reflection intensity of a certain reflection area weakens, the corresponding grid will trigger the contact switch to close, and then control the nozzle to rotate and descend to the corresponding position for cleaning. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of an integrating sphere according to an embodiment of this application.

[0032] Figure 2 It is a cross-sectional view of a flap according to an embodiment of this application.

[0033] Figure 3 It is a schematic structural diagram of a spherical shell according to an embodiment of this application.

[0034] Figure 4It is a cross-sectional view of the pipe jacking in the embodiment of the present application.

[0035] Reference numerals: 1, spherical shell; 2, light outlet; 3, flap; 4, grid; 5, magnetic sheet; 6, concave hole; 7, metal rod; 8, cleaning box; 9, nozzle; 10, connecting pipe; 11, support pipe; 12, transmission shaft; 13, lead screw; 14, transmission wheel; 15, pipe jacking; 16, driving wheel; 17, magnetic member; 18, chute; 19, first return spring; 20, metal sheet; 21, rotating shaft; 22, sliding hole; 23, optoelectronic element; 24, tension spring. Detailed implementation manners

[0036] The following further elaborates on the present application Figures 1-4 in conjunction with the accompanying drawings.

[0037] The embodiment of the present application discloses a testing device and method for the aging degree of nitride phosphors. The testing device for the aging degree of nitride phosphors includes a spherical shell 1 and a self-cleaning device arranged at the top end of the spherical shell 1. The inner peripheral surface of the spherical shell 1 is coated with a reflective coating; the reflective coating can be polytetrafluoroethylene. The outer peripheral surface of the spherical shell 1 is fixedly provided with a light inlet and a light outlet 2 communicated with the spherical shell 1; preferably, the light inlet and the light outlet 2 are respectively arranged on both sides of the spherical shell 1, and the connecting lines of the light inlet and the light outlet 2 with the center of the spherical shell 1 are not collinear. A light source for projecting into the spherical shell 1 is arranged in the light inlet. A detection device is arranged on the light outlet 2.

[0038] The detection device includes a flap 3 and a plurality of grids 4 fixedly arranged on the plane of the flap 3. Preferably, the flap 3 is hinged to the end face of the light outlet 2 so that the flap 3 can rotate around the end face of the light outlet 2; when in the detection state, the flap 3 flips downward so that the flap 3 covers the light outlet 2 and the grids 4 face the light outlet 2 direction; when in the non-detection state, the flap 3 flips upward and the flap 3 is located above the light outlet 2. An optoelectronic element 23 is fixedly arranged in each grid 4. In this embodiment, the optoelectronic element 23 is a photodiode; a magnetic sheet 5 is embedded in the side wall of the grid 4 close to the flap 3, and the magnetic sheet 5 is an electromagnet. The optoelectronic element 23 is connected to the magnetic sheet 5 through an amplifier, a comparator and a relay. Specifically, the photodiode is connected to the reverse input end of the amplifier; the output end of the amplifier is connected to the reverse input end of the comparator, and the positive input end of the amplifier is connected to a reference voltage; the output end of the comparator is connected to the relay coil, and the electromagnet is connected to the normally open contact of the relay; the non-inverting input end of the amplifier is grounded.

[0039] Further, after the light source emits light into the spherical shell 1, when the light flux received by the photodiode in the grid 4 is less than the preset light flux, the input voltage received by the comparator is less than the reference voltage, and the comparator sends a high-level signal to the relay, and the relay controls the magnetic sheet 5 to be energized.

[0040] A plurality of concave holes 6 are formed in the flap 3, and each grid 4 corresponds to a concave hole 6. A metal rod 7 is slidably arranged in the concave hole 6 along the thickness direction of the flap 3; after the magnetic sheet 5 is electrified, the metal rod 7 is magnetically adsorbed and moved towards the photoelectric element 23. A tension spring 24 is fixedly arranged in the concave hole 6, and the end of the tension spring 24 is fixedly connected to the metal tube for driving the metal rod 7 to reset in the direction away from the magnetic sheet 5. A contact switch is arranged between the concave hole 6 and the metal rod 7; after the metal rod 7 moves towards the magnetic sheet 5, the contact switch is in a closed state; when the magnetic sheet 5 is powered off and the metal rod 7 moves in the direction away from the magnetic sheet 5, the contact switch is in an open state.

[0041] The self-cleaning device includes a cleaning box 8 fixedly arranged on the top surface of the spherical shell 1 and a nozzle 9 slidably arranged vertically. The top end of the nozzle 9 is fixedly connected with a connecting pipe 10, and an air pipe and a liquid pipe respectively communicated with the connecting pipe 10 are fixedly arranged on the outer peripheral surface of the connecting pipe 10; an air pump is arranged on the air pipe, and the liquid pipe is connected with a liquid storage tank through a liquid pump; the liquid pipe is used for spraying a cleaning liquid onto the inner wall of the spherical shell 1; the air pipe is used for spraying a drying gas onto the inner wall of the spherical shell 1 to quickly air-dry.

[0042] A support pipe 11 is fixedly arranged on the top surface of the cleaning box 8, and a support rod is slidably arranged in the support pipe 11. The support pipe 11 provides a guiding function for the vertical movement of the support rod; preferably, both the support pipe 11 and the support rod are polygonal. A lead screw 13 is fixedly arranged at the bottom end of the support rod; a transmission wheel 14 in threaded cooperation with the lead screw 13 is rotatably arranged at the bottom end of the support pipe 11, and the lead screw 13 passes through the transmission wheel 14 and is coaxially connected with the transmission wheel 14. The top end of the connecting pipe 10 is rotatably connected with the bottom end of the lead screw 13. A top pipe 15 is fixedly arranged on the inner wall of the cleaning box 8, a driving wheel 16 is rotatably arranged at the bottom end of the top pipe 15, and the driving wheel 16 is engaged with the transmission wheel 14; a rotation assembly one is arranged in the top pipe 15, and the rotation assembly one drives the driving wheel 16 to rotate to make the lead screw 13 and the nozzle 9 move downward. A rotation assembly two is arranged in the lead screw 13, and the rotation assembly two is used for driving the connecting pipe 10 to rotate horizontally to adjust the horizontal orientation of the nozzle 9. The rotation assembly two has the same structure as the rotation assembly one.

[0043] The first rotating component includes a transmission shaft 12 and a rotating shaft 21 fixedly connected to each other, and a plurality of magnetic members 17 slidably arranged in the jacking pipe 15 in the horizontal direction. A plurality of sliding grooves 18 are uniformly distributed along the axial direction of the inner wall of the jacking pipe 15, and the plurality of magnetic members 17 are respectively slidably arranged in the sliding grooves 18. A first return spring 19 is fixedly arranged in the sliding groove 18 for driving the magnetic member 17 to move towards the inner side of the sliding groove 18. A plurality of metal sheets 20 are uniformly distributed along the axial direction of the inner wall of the jacking pipe 15 opposite to the sliding groove 18. After the magnetic member 17 is electrified, it moves towards the outer side of the sliding groove 18 by magnetic adsorption with the metal sheet 20. A metal block is fixedly arranged at the top end of the transmission shaft 12. After the magnetic member 17 is electrified and moves towards the outer side of the sliding groove 18, the transmission shaft 12 is moved upwards by magnetic adsorption. A guiding piece is fixedly arranged on the side wall of the transmission shaft 12, and a guiding groove for accommodating the guiding piece is formed in the inner wall of the jacking pipe 15; a second return spring is fixedly arranged in the guiding groove, and the second return spring is fixedly connected to the guiding piece for driving the guiding piece to reset downwards.

[0044] The rotating shaft 21 is fixedly connected to the bottom end of the transmission shaft 12; a plurality of spiral protrusions are uniformly distributed along the circumferential direction of the outer peripheral surface of the rotating shaft 21; a transmission hole for passing through the rotating shaft 21 is formed in the driving wheel 16; a plurality of spiral grooves are uniformly distributed along the circumferential direction of the inner peripheral surface of the transmission hole, and the spiral protrusions are engaged with the spiral grooves. When the rotating shaft 21 moves vertically, the driving wheel 16 is rotated by the spiral protrusions pressing against the spiral grooves.

[0045] Specifically, the magnetic member 17 in the jacking pipe 15 is connected to the contact switches in a plurality of concave holes 6 and is connected to the power supply through the contact switches. In this embodiment, the magnetic member 17 in the jacking pipe 15 is connected to the contact switches in a plurality of concave holes 6 arranged along the width direction of the flap 3. When the contact switches in the concave holes 6 are turned on, the magnetic member 17 is electrified and moves the transmission shaft 12 upwards by magnetic adsorption. During the movement of the rotating shaft 21, the driving wheel 16 is rotated, and the lead screw 13 and the nozzle 9 are driven to move downwards through the transmission wheel 14. The reflective coating in the spherical shell 1 is evenly divided into a plurality of reflective areas, and each grid 4 corresponds to one reflective area; a plurality of reflective areas arranged vertically in the spherical shell 1 correspond to a plurality of grids 4 arranged along the length direction of the flap 3 one by one. The height of the magnetic member 17 in the jacking pipe 15 corresponds to the distance that the nozzle 9 moves downwards, so that the nozzle 9 moves downwards to the same height as the corresponding reflective area.

[0046] A plurality of spiral grooves are evenly distributed along the circumferential direction at the top of the inner peripheral surface of the connecting pipe 10. The rotating shaft 21 in the second rotating assembly is engaged with the connecting pipe 10. By moving the rotating shaft 21 vertically, the connecting pipe 10 is driven to rotate. A sliding hole 22 for accommodating the transmission shaft 12 of the second rotating assembly is provided at the bottom end of the lead screw 13; a plurality of magnetic members 17 are evenly distributed along the axial direction of the lead screw 13 in the sliding hole 22 of the lead screw 13. The magnetic members 17 in the lead screw 13 rotate the connecting pipe 10 by magnetically adsorbing the transmission shaft 12. Specifically, the magnetic members 17 in the lead screw 13 are connected to the contact switches in a plurality of concave holes 6 arranged along the length direction of the flap 3; after the contact switches in the concave holes 6 are turned on, the magnetic members 17 are energized and adsorb the transmission shaft 12 of the rotating assembly to move upward. During the movement of the transmission shaft 12 and the rotating shaft 21, the connecting pipe 10 is driven to rotate. A plurality of reflection areas arranged circumferentially in the spherical shell 1 correspond one by one to a plurality of grids 4 arranged along the width direction of the flap 3. The height of the magnetic members 17 in the lead screw 13 corresponds to the rotation angle of the connecting pipe 10, so that the nozzle 9 rotates to the same angle as the corresponding reflection area. It should be noted that the magnetic members 17 of the first rotating assembly and the second rotating assembly are respectively connected to the contact switches.

[0047] Specifically, when the light intensity reflected by a certain reflection area in the spherical shell 1 is weakened due to pollution, the light signal received by the corresponding grid 4 is reduced; when the light flux received by the photodiode is less than the preset light flux, the contact switch at the position of the grid 4 is closed. After the contact switch is closed, the corresponding magnetic members 17 in the lead screw 13 and the top pipe 15 are energized; after the magnetic members 17 in the lead screw 13 are energized, the nozzle 9 is controlled to rotate by a corresponding angle; after the magnetic members 17 in the top pipe 15 are energized, the nozzle 9 is controlled to descend by a corresponding height; after the nozzle 9 descends to the corresponding height of the polluted reflection area, it faces the reflection area for subsequent cleaning operations.

[0048] A timer one and a relay are provided on the connection circuit of the liquid pump; a timer two and a relay are provided on the connection circuit of the air pump. The timer one records a unit time one and then sends a high-level signal to the relay. The liquid pump is connected to the normally open contact of the relay, and then sends a low-level signal to the relay after a unit time. The timer two records a unit time three and then sends a high-level signal to the relay. The air pump is connected to the normally open contact of the relay, and then sends a low-level signal to the relay after a unit time four. Preferably, the unit time three is not less than the unit time two. After the liquid pump is closed after the unit time two, the air pump is turned on after the unit time three. The timer one and the timer two are respectively connected in parallel with a plurality of contact switches. After any one of the contact switches is turned on, the timer one and the timer two start timing.

[0049] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A test device for the aging degree of a nitride phosphor, characterized in that, Comprising: A spherical shell (1), a light inlet and a light outlet (2), the light inlet and the light outlet (2) are respectively arranged on the spherical shell (1); A flap (3) and a grid (4), the flap (3) is connected to the light outlet (2); a plurality of the grids (4) are evenly distributed on the flap (3); An optoelectronic element (23), the optoelectronic element (23) is arranged in the grid (4), and the optoelectronic element (23) is used for detecting the change of light flux; Further comprising: a cleaning box (8) and a support tube (11), the cleaning box (8) is fixedly arranged on the top of the spherical shell (1); the support tube (11) is fixedly arranged on the top of the cleaning box (8); A support rod and a lead screw (13), the support rod is slidably arranged vertically in the support tube (11); the lead screw (13) is fixedly connected to the bottom end of the support rod; A connecting pipe (10) and a nozzle (9), the connecting pipe (10) is rotatably arranged at the bottom end of the lead screw (13); the nozzle (9) is fixedly connected to the bottom end of the connecting pipe (10); A transmission wheel (14), the transmission wheel (14) is rotatably arranged at the bottom end of the support tube (11) and is in threaded cooperation with the lead screw (13); A top pipe (15) is fixedly arranged on the top of the cleaning box (8), and a first rotating assembly is arranged in the top pipe (15); the first rotating assembly includes: A driving wheel (16), the driving wheel (16) is rotatably arranged at the bottom end of the top pipe (15) and is meshed with the transmission wheel (14); Magnetic members (17), a plurality of the magnetic members (17) are slidably arranged in the top pipe (15); a plurality of metal sheets (20) are also fixedly arranged in the top pipe (15); the magnetic members (17) are electromagnets; after the magnetic members (17) are energized, they move by magnetically adsorbing the metal sheets (20); A transmission shaft (12), the transmission shaft (12) is slidably arranged axially along the top pipe (15) in the top pipe (15), and the transmission shaft (12) moves by magnetically adsorbing with the magnetic members (17); A rotating shaft (21), the rotating shaft (21) is fixedly connected to the transmission shaft (12), and the rotating shaft (21) cooperates with the driving wheel (16) to make the driving wheel (16) rotate; A sliding hole (22) is opened at the bottom end of the lead screw (13), and a second rotating assembly is arranged in the sliding hole (22); the second rotating assembly has the same structure as the first rotating assembly, and the second rotating assembly is used for driving the connecting pipe (10) to rotate; A magnetic sheet (5) is fixedly arranged in the grid (4), the magnetic sheet (5) is an electromagnet; concave holes (6) are evenly distributed on the flap (3), metal rods (7) are slidably arranged in the concave holes (6), the magnetic sheet (5) is used for magnetically adsorbing the metal rods (7), a contact switch is arranged between the metal rods (7) and the concave holes (6), the magnetic members (17) are electrically connected to the contact switch, and the optoelectronic element (23) is electrically connected to the magnetic sheet (5); The optoelectronic element (23) is connected to the magnetic sheet (5) through an amplifier, a comparator and a relay.

2. The test device for the aging degree of a nitride phosphor according to claim 1, characterized in that: An air pipe and a liquid pipe are fixedly connected to the outer peripheral surface of the connecting pipe (10); an air pump is arranged on the air pipe, and a liquid pump is arranged on the liquid pipe.

3. The testing device for the aging degree of a nitride phosphor according to claim 1, wherein: A plurality of spiral protrusions are circumferentially and uniformly distributed on the outer peripheral surface of the rotating shaft (21); a transmission hole for passing through the rotating shaft (21) is formed in the driving wheel (16); a plurality of spiral grooves are circumferentially and uniformly distributed on the inner peripheral surface of the transmission hole, and the spiral protrusions are engaged with the spiral grooves.

4. The test device for the aging degree of a nitride phosphor according to claim 2, characterized in that: The air pump and the liquid pump are respectively connected to a timer.

5. A method for testing the aging degree of a nitride phosphor, characterized in that: The pollutants in the spherical shell (1) are removed by using the testing device for the aging degree of the nitride phosphor according to any one of claims 1-4.

Images