An illuminance uniformity testing device

Abstract

The present disclosure relates to a kind of illumination uniformity test device, it relates to the field of light measurement, including: illuminometer body, flexible test blanket, flexible test blanket is electrically connected with illuminometer body;Flexible test blanket includes protective layer, sensing layer and heat insulation layer, sensing layer is between protective layer and heat insulation layer, sensing layer includes multiple array arrangement test points, test point is used to collect the photoelectric signal data of corresponding position, and is transmitted to illuminometer body;Sensing layer is at least partially embedded in the interior of protective layer.Such, the flexible test blanket of can be rolled up by flexible test blanket and optical fiber sensing fusion technology and is stored, while guaranteeing that optical fiber transmission performance is stable after multiple curling.

Description

Technical Field

[0001] This disclosure relates to the field of light measurement technology, and in particular to an illuminance uniformity testing device. Background Technology

[0002] An illuminance meter (or lux meter) is an instrument specifically designed to measure illuminance. It measures the degree to which an object is illuminated, that is, the ratio of luminous flux received by the object's surface to the illuminated area. An illuminance meter typically consists of a selenium or silicon photovoltaic cell, along with a filter and a microammeter.

[0003] Existing lux meters are mostly single-point measurements, requiring manual movement of equipment to complete multi-point testing. Manual data recording is prone to errors, and uniformity indicators need to be calculated manually. Fixed test boards cannot flexibly adapt to different scenarios, and the wiring between test points is complex. Rigid test boards are bulky, making them inconvenient to carry and store.

[0004] Therefore, how to design an illumination uniformity testing device that can perform multi-point synchronous measurement and is easy to store has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned technical issues, this disclosure provides an illumination uniformity testing device for achieving multi-point synchronous measurement and is easy to store.

[0006] This disclosure provides an illuminance uniformity testing device, including: an illuminance meter body and a flexible test blanket, wherein the flexible test blanket is electrically connected to the illuminance meter body;

[0007] The flexible test blanket includes a protective layer, a sensing layer, and a heat insulation layer. The sensing layer is located between the protective layer and the heat insulation layer. The sensing layer includes multiple test points arranged in an array. The test points are used to collect photoelectric signal data at corresponding locations and transmit it to the illuminance meter body.

[0008] The sensing layer is at least partially embedded within the protective layer.

[0009] Optionally, the protective layer comprises an inorganic flexible substrate or an organic flexible substrate.

[0010] Optionally, the insulation layer material includes a transparent layer located on the side of the sensing layer opposite to the protective layer.

[0011] Optionally, each of the test points includes a miniature fiber optic sensor, which is at least partially located inside the protective layer.

[0012] Optionally, the flexible test blanket further includes a photoelectric conversion module, and each of the miniature fiber optic sensors is connected to the photoelectric conversion module via a multimode fiber. The photoelectric conversion module is electrically connected to the illuminance meter body.

[0013] Optionally, the flexible test blanket includes a first area and a second area, the first area being the central part of the second area, the area of ​​the figure formed by connecting the test points on the outermost ring of the first area being less than or equal to 300*500mm, and the area of ​​the figure formed by connecting the test points on the outermost ring of the second area being less than or equal to 500*700mm.

[0014] Optionally, the flexible test blanket includes an unfolded state and a rolled-up state, wherein in the rolled-up state, the multimode optical fiber in the flexible test blanket is spiral-shaped.

[0015] Optionally, in the curled state, the curling radius of the flexible test blanket is less than or equal to 5 cm.

[0016] Optionally, the device includes a storage component for storing the flexible test blanket in its curled state.

[0017] Optionally, the illuminance meter body includes a data acquisition module, a central controller, and a communication module. The data acquisition module is electrically connected to the flexible test blanket, and the central controller is electrically connected to both the data acquisition module and the communication module. The data acquisition module is used to acquire and store photoelectric signal data of the test points in the flexible test blanket. The central controller also includes a calculation module, which is used to automatically calculate the illuminance uniformity of the test scene based on the photoelectric signal data. The communication module is used to support wireless transmission of photoelectric signal data and the generation of illuminance uniformity reports for the test scene.

[0018] The technical solution provided in this disclosure has the following advantages compared with the prior art: The illuminance uniformity testing device provided in this disclosure includes: an illuminance meter body and a flexible testing mat, the flexible testing mat being electrically connected to the illuminance meter body; the flexible testing mat includes a protective layer, a sensing layer, and a heat insulation layer, the sensing layer being located between the protective layer and the heat insulation layer, the sensing layer including multiple arrayed test points, the test points being used to collect photoelectric signal data at corresponding locations and transmit it to the illuminance meter body; the sensing layer is at least partially embedded inside the protective layer. By combining the flexible testing mat with a smart illuminance meter, multi-point synchronous measurement, automatic calculation of uniformity, and generation of test reports can be achieved, solving the problems of low efficiency, large errors, poor portability, and difficulty in storage associated with traditional methods; by setting multiple test points in the flexible testing mat, multi-point or single-point synchronous measurement can be achieved, meeting the testing needs of different scenarios. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The diagram shown is a schematic diagram of an illuminance uniformity testing device provided in an embodiment of this disclosure;

[0022] Figure 2 The diagram shown is a schematic representation of the membrane layer of a flexible test blanket provided in an embodiment of this disclosure;

[0023] Figure 3 The diagram shown is a connection diagram of a device in a sensing layer according to an embodiment of this disclosure;

[0024] Figure 4 The diagram shown illustrates the relative positional relationship between a flexible testing mat and a storage component according to an embodiment of this disclosure.

[0025] Figure 5 The diagram shown is a schematic diagram of the connection of an illuminance meter body module provided in an embodiment of this disclosure. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0028] Figure 1 The diagram shown is a schematic diagram of an illuminance uniformity testing device provided in an embodiment of this disclosure. Figure 2 The diagram shown is a schematic representation of the membrane layer of a flexible test blanket provided in an embodiment of this disclosure. Figure 3 The diagram shown is a connection schematic of a device in a sensing layer according to an embodiment of this disclosure. Please refer to it. Figures 1 to 3This disclosure provides an illuminance uniformity testing device 100, including: an illuminance meter body 20 and a flexible test blanket 10, the flexible test blanket 10 being electrically connected to the illuminance meter body 20; the flexible test blanket 10 includes a protective layer 13, a sensing layer 14 and a heat insulation layer 16, the sensing layer 14 being located between the protective layer 13 and the heat insulation layer 16, the sensing layer 14 including a plurality of arrayed test points 11, the test points 11 being used to collect photoelectric signal data at corresponding locations and transmit it to the illuminance meter body 20; the sensing layer 14 is at least partially embedded inside the protective layer 13.

[0029] Specifically, the flexible test mat 10 can be connected to the illuminance meter body 20 via a bus. The bus is a common communication line used to connect various functional components, responsible for transmitting data, addresses, and control signals between different components. In this embodiment, the bus is used to realize data interaction between the illuminance meter body 20 and the external flexible test mat 10. In an optional embodiment provided in this disclosure, the flexible test mat 10 includes a protective layer 13, a sensing layer 14, and a heat insulation layer 16. The sensing layer 14 is at least partially embedded within the protective layer 13, which protects the sensing layer 14. The sensing layer 14 includes multiple arrayed test points 11, which are used to collect photoelectric signal data from corresponding locations of the device under test and transmit it to the illuminance meter body 20. Each test point 11 includes a sensor element. The heat insulation layer 16 covers the sensing layer 14 to reduce the influence of external temperature on the sensor elements in the sensing layer 14 and improve the detection accuracy of the photoelectric signal data. Thus, by setting multiple test points on the flexible test mat 10, multi-point synchronous measurement of the device under test can be achieved, and measurement errors can be reduced. By electrically connecting the flexible test mat 10 to the illuminance meter body 20, uniformity can be automatically calculated and a test report can be generated. Compared with single-point measurement in related technologies, the illuminance uniformity testing device 100 provided in this disclosure is more efficient, has smaller errors, is more portable, and is easier to store.

[0030] Please refer to Figure 2 In the illumination uniformity testing device 100 provided in this disclosure, the protective layer 13 includes an inorganic flexible substrate or an organic flexible substrate.

[0031] Specifically, in one optional embodiment provided in this disclosure, the protective layer 13 includes an inorganic flexible substrate, such as silicone. Silicone is a type of polymeric elastomer with silicon-oxygen bonds (Si-O-Si) as its main chain. Its core components include a base polymer, a crosslinking agent and a curing system, and the base polymer. Polydimethylsiloxane (PDMS) is the most common silicone matrix, with a helical molecular chain structure that gives silicone its flexibility and temperature resistance. Optionally, the base polymer may also include a crosslinking agent containing hydrogen-containing silicone oil (Si-H bonds) or peroxides (such as DCP). The crosslinking agent helps to form a three-dimensional network structure and improves the elasticity of the silicone. Silicone possesses excellent temperature resistance, withstanding temperatures ranging from -50°C to 250°C. It also exhibits good chemical stability, resisting acids, alkalis, and corrosion; and excellent electrical insulation, elasticity, and flexibility. These properties protect the sensing layer 14 embedded within the protective layer 13, reducing the impact of external forces on the sensor layer and extending the service life of the flexible test blanket 10. Furthermore, the good elasticity and flexibility of silicone allow the flexible test blanket 10 to maintain good extensibility and prevent deformation even when rolled up and then unrolled, despite the pressure on the sensing layer 14. It should be noted that the above is merely an example; the protective layer 13 can also be other types of inorganic flexible substrates, and this disclosure does not limit it to these types.

[0032] In another optional embodiment provided in this disclosure, the protective layer 13 includes an organic flexible substrate, such as a composite fabric. The composite fabric combines different materials, possessing multiple superior properties. The materials include natural fibers such as cotton, linen, silk, and wool; synthetic fibers such as polyester, nylon, spandex, and polypropylene; and high-performance fibers such as carbon fiber, aramid fiber, and glass fiber. The composite fabric can be a composite of a single type of fiber or a composite of multiple types of fibers; this disclosure does not limit this. The composite fabric can be a single-layer structure or a multi-layer structure; this disclosure does not limit this, and the specific design can be determined according to actual needs. The composite fabric possesses a certain degree of elasticity and flexibility, which can protect the sensor components in the sensing layer 14, reduce the impact of external forces on the sensing layer 14, and extend its service life. Furthermore, the inherent flexibility of the composite fabric facilitates the unfolding of the flexible testing blanket 10 during operation and its curling up when not in operation, and can reduce the pressure on the sensing layer 14 in the curled state. Thus, by using an inorganic or organic flexible substrate with a certain degree of elasticity and flexibility to make the protective layer 13, the sensing layer 14 can be protected, the pressure of the flexible test blanket 10 on the sensing layer 14 in the rolled-up state can be reduced, and the recovery of the flexible test blanket 10 from the rolled-up state to the unfolded state can be facilitated, thus reducing deformation.

[0033] Please refer to Figure 2This disclosure provides an illumination uniformity testing device 100, wherein the heat insulation layer 16 includes a transparent layer located on the side of the sensing layer 14 away from the protective layer 13.

[0034] Specifically, the heat insulation layer 16 includes a transparent layer. The material of the transparent layer includes a diffuse reflection coating with a light transmittance greater than 90%. Optionally, the transparent layer includes a water-based high diffuse reflection coating, a high-transmittance, high-fog anti-glare coating, etc. Among them, the water-based high diffuse reflection coating is a coating that combines a water-based medium with high-reflectance, high-temperature resistant micro-nano materials, with a total reflectance of 95% and a diffuse reflectance of 94%, achieving efficient light scattering. The high-transmittance, high-fog anti-glare coating is a coating that achieves the synergistic effect of UV-cured borosilicate resin and acrylic resin, with a light transmittance of over 90% and a haze of 60% to 85%, achieving a balance between high light transmittance and high haze. Not all of these are listed here. It should be noted that this disclosure does not limit the material of the heat insulation layer 16, as long as it meets the requirement of a light transmittance greater than 90%. This embodiment of the invention covers the sensing layer 14 with a heat insulation layer 16, which is made of a diffuse reflective coating with a light transmittance greater than 90%. The heat insulation layer 16 mainly reduces the temperature conducted to the sensing layer 14 by reducing heat conduction, suppressing heat convection, and reflecting heat radiation. The use of a diffuse reflective coating with a light transmittance greater than 90% in the heat insulation layer 16 reduces shading of the devices in the sensing layer 14, ensuring the accuracy of light testing of the sensing layer 14 while reducing heat conduction. Thus, by setting a heat insulation layer 16 with a light transmittance greater than 90% on the sensing layer 14, the impact of temperature on the devices in the sensing layer 14 can be reduced while minimizing light shading, ensuring testing accuracy.

[0035] Please refer to Figures 1 to 2 This disclosure provides an illumination uniformity testing device 100, wherein each test point 11 includes a miniature fiber optic sensor 15, and the miniature fiber optic sensor 15 is at least partially located inside the protective layer 13.

[0036] Specifically, in one optional embodiment provided in this disclosure, the flexible test mat 10 includes multiple test points 11, each test point 11 including a miniature fiber optic sensor 15. When the flexible test mat 10 is in an unfolded state, the miniature fiber optic sensors 15 are arranged in an array on the plane of the flexible test mat 10. Optionally, the miniature fiber optic sensors 15 can be arranged in a rectangular, pentagonal, hexagonal, or other shapes as a repeating unit. This disclosure does not limit the shape of the repeating unit formed by the miniature fiber optic sensors 15, and the specific shape can be set according to the actual test scenario.

[0037] The micro-optical fiber sensor 15 (MOFS) is a highly integrated sensing device based on fiber optic technology and micro / nano fabrication processes. It achieves high-precision, miniaturized, and electromagnetically interference-resistant real-time monitoring by interactively modulating optical signals with the measured physical quantity (such as pressure, temperature, strain, chemical composition, etc.). The size of the micro-optical fiber sensor 15 can be as low as millimeters or even micrometers. In this embodiment, multiple micro-optical fiber sensors 15 can be deployed on the flexible test mat 10 to accurately acquire photointensity and brightness data of the measured scene.

[0038] The miniature fiber optic sensor 15 is at least partially located inside the protective layer 13. Specifically, the miniature fiber optic sensor 15 can be implanted into the protective layer 13 through openings or embedding. The protective layer 13 can fix the miniature fiber optic sensor 15, reducing measurement errors caused by the movement of the miniature fiber optic sensor 15, and also reducing the possibility of displacement or detachment of the miniature fiber optic sensor 15 due to the unfolding and rolling of the flexible test blanket 10. Thus, by setting the miniature fiber optic sensor 15 to be at least partially located inside the protective layer 13, the miniature fiber optic sensor 15 can be fixed, reducing the reduction in detection accuracy caused by its movement.

[0039] Please refer to Figures 1 to 3 This disclosure provides an illumination uniformity testing device 100. The flexible test blanket 10 also includes a photoelectric conversion module. Each miniature fiber optic sensor 15 is connected to the photoelectric conversion module through a multimode fiber optic cable 17. The photoelectric conversion module is electrically connected to the illuminance meter body 20.

[0040] Specifically, the photoelectric conversion module includes multiple miniature photodiodes 18, miniature fiber optic sensors 15, and miniature photodiodes 18 connected one-to-one. Each miniature photodiode 18 is a miniature semiconductor device that converts optical signals into electrical signals; its core is based on the photoelectric effect of a PN junction. When the miniature photodiodes 18 are connected to the miniature fiber optic sensors 15, they form an optical signal detection and conversion system. Its working principle mainly involves the transmission, modulation, demodulation, and photoelectric conversion of optical signals. First, the miniature fiber optic sensor 15 acquires the optical signal from the scene under test. The sensor itself modulates the optical signal, and the demodulated optical signal (usually a light intensity change signal) is transmitted to the miniature photodiodes 18 via a multimode fiber 17. Each miniature photodiode 18 has a high-field depletion region and an absorption region that absorbs photons. When the photon energy is greater than the bandgap energy of the semiconductor material, electrons in the absorption region are excited from the valence band to the conduction band, generating electron-hole pairs. Under the influence of the built-in electric field of the PN junction of the photodiode, electrons are pushed towards the N-region, and holes are pushed towards the P-region, thus forming a photocurrent in the external circuit. The magnitude of the photocurrent is proportional to the light intensity incident on the miniature photodiode 18. Since the light intensity has been modulated by the miniature fiber optic sensor 15 according to the measured physical quantity, the photocurrent also carries information about the measured physical quantity. The photocurrent carrying the measured physical quantity information is transmitted to the illuminance meter body 20 via a bus. The calculation module 23 in the illuminance meter body 20 automatically calculates the average illuminance, minimum / maximum value, and uniformity of the scene under test, and marks the areas that do not meet the standards. Furthermore, the illuminance meter body 20 can also generate a test report containing the coordinates of the test point 11, the illuminance distribution map, and the conclusions for the user to review.

[0041] The diameter of the multimode optical fiber 17 is less than or equal to 0.5 mm. Optionally, the diameter of the multimode optical fiber 17 may be less than or equal to 0.4 mm, or less than or equal to 0.3 mm, or less than or equal to 0.2 mm, etc., and so on. These are not listed here, and this disclosure does not specifically limit the diameter of the multimode optical fiber 17, as long as it is within the range of less than or equal to 0.5 mm. Optionally, the diameter of the multimode optical fiber 17 may be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, etc.

[0042] In this embodiment, multimode fiber 17 is used as the transmission medium to transmit an optical signal carrying the measured physical quantity information from the miniature fiber optic sensor 15 to the location of the miniature photodiode 18. Multimode fiber 17 has advantages such as low loss and resistance to electromagnetic interference, which can ensure the stability and accuracy of the optical signal during transmission.

[0043] Please continue to refer to this. Figure 1This disclosure provides an illumination uniformity testing device 100. The flexible test blanket 10 includes a first zone 101 and a second zone 102. The first zone 101 is the central part of the second zone 102. The area of ​​the figure formed by connecting the outermost ring of test points 11 in the first zone 101 is less than or equal to 300*500mm. The area of ​​the figure formed by connecting the outermost ring of test points 11 in the second zone 102 is less than or equal to 500*700mm.

[0044] Specifically, the national standard GB / T 9473-2022, "Performance Requirements for Reading and Writing Desk Lamps," is the current national standard for reading and writing desk lamps in my country. It was released on December 30, 2022, and officially implemented on January 1, 2024, replacing the old version GB / T9473-2017. This standard sets strict performance requirements for reading and writing desk lamps. Key technical requirements include: Illuminance performance; Effective illumination area: changed from a 120° sector area in the old version to a 700mm*500mm rectangular area, with a 500mm*300mm central area; Illuminance uniformity: Central area illuminance uniformity ≤3, total area illuminance uniformity ≤7, stricter than the old standard; Illuminance level: The measurement value changed from "illuminance level" to "luminance level." The area of ​​the pattern formed by connecting the outermost ring of test points 11 in the first zone 101 of the flexible test mat 10 provided in this embodiment is less than or equal to 300*500mm. The first zone 101 is the central area of ​​the flexible test mat 10. The area of ​​the pattern formed by connecting the outermost ring of test points 11 in the second zone 102 of the flexible test mat 10 is less than or equal to 500*700mm. The second zone 102 is the entire test area of ​​the flexible test mat 10. That is, the test range of the illuminance uniformity testing device 100 provided in this embodiment meets the requirements of the national standard GB / T 9473-2022 and can be used to conduct extensive testing on different types of desk lamps under the new national standard.

[0045] Please continue to refer to this. Figures 1 to 3 This disclosure provides an illumination uniformity testing device 100. The flexible test blanket 10 includes an unfolded state and a rolled-up state. In the rolled-up state, the multimode optical fiber 17 in the flexible test blanket 10 is spiral-shaped.

[0046] Specifically, the flexible test blanket 10 includes an unfolded state, in which the second region 102 of the flexible test blanket 10 is a rectangular area parallel to the plane to be tested. The flexible test blanket 10 also includes a rolled-up state, in which the flexible test blanket 10 can be rolled into a cylindrical shape. It should be noted that, in order to reduce the bending loss of the multimode fiber 17 in the curled state, the path of the multimode fiber 17 is arranged in a spiral shape when curled. It should be noted that the spiral arrangement of the multimode fiber 17 during curling is related to the arrangement of the multimode fiber 17 in the flexible test blanket 10 and the user's curling method. For example, when the extension direction of the multimode fiber 17 is perpendicular to the first direction D1, it can be curled from a certain vertex of the flexible test blanket 10 along the diagonal direction to make the multimode fiber 17 spiral, and the first direction D1 is the row or column direction of the test point 11; or, when the extension direction of the multimode fiber 17 intersects (but is not perpendicular to) the first direction D1, it can be curled along a certain side of the flexible test blanket 10 to make the multimode fiber 17 spiral, etc. This disclosure does not limit the arrangement of the multimode fiber 17, nor does it limit the curling method of the flexible test blanket 10, as long as the multimode fiber 17 in the curled state of the flexible test blanket 10 is spiral. Thus, by arranging the multimode fiber 17 in the flexible test blanket 10 in a spiral shape in the curled state, the bending loss of the multimode fiber 17 in the bending state can be reduced, and the service life of the flexible test blanket 10 can be increased.

[0047] Please continue to refer to this. Figures 1 to 3 This disclosure provides an illumination uniformity testing device 100, wherein the curling radius of the flexible test blanket 10 in the curled state is less than or equal to 5 cm.

[0048] Specifically, the curling radius of the flexible testing mat 10 is less than or equal to 5 cm. Optionally, the curling radius of the flexible testing mat 10 can be less than or equal to 4 cm, or less than or equal to 3 cm, or less than or equal to 2 cm, etc. These are not listed exhaustively here. This disclosure does not limit the curling radius of the flexible testing mat 10, as long as it falls within the range of less than or equal to 5 cm. When the curling radius of the flexible testing mat 10 is greater than 5 cm, the radius after curling is too large, which is not conducive to storage. Therefore, by setting the curling radius of the flexible testing mat 10 to less than or equal to 5 cm, it is beneficial to reduce the rolling volume and facilitate storage.

[0049] Figure 4 The diagram shown illustrates the relative positions of a flexible testing mat and a storage component according to an embodiment of this disclosure. Please refer to the provided text for further details. Figures 1 to 4This disclosure provides an illumination uniformity testing device 100, which includes a storage component 30 for storing a flexible test blanket 10 in a rolled-up state.

[0050] Specifically, in one optional embodiment provided in this disclosure, the receiving component 30 is a square groove or an annular groove; this disclosure does not limit it to this type. Figure 4 Taking a square slot as an example, the rolled-up flexible test blanket 10 can be stored within the storage component 30. In another optional embodiment provided in this disclosure, the storage component 30 is a ring-shaped buckle. When the rolled-up flexible test blanket 10 is stored in the ring-shaped buckle, the ring-shaped buckle engages; when the flexible test blanket 10 needs to be removed, the ring-shaped buckle disengages. In another optional embodiment provided in this disclosure, the storage component 30 is an elastic coil. The elastic coil can be fixed to the back of the illuminance meter, and the elastic coil can be directly opened to place the rolled-up flexible test blanket 10. By sleeved on the flexible test blanket 10, the flexible test blanket 10 can be kept in a rolled-up state. The above are merely examples, and this disclosure does not limit the structure or material of the storage component 30, as long as it can accommodate the rolled-up flexible test blanket 10. Thus, by setting up the storage component 30, the rolled-up flexible test blanket 10 can be stored, reducing the risk of loss.

[0051] It should be noted that the flexible test mat 10 and the illuminance meter body 20 are connected via a bus, such as through a USB interface. After completing a stage of the testing task, the connection between the flexible test mat 10 and the illuminance meter body 20 can be disconnected, and the flexible test mat 10, the illuminance meter body 20 and the connecting cable can be stored in the storage component 30. This disclosure does not limit this, and the specific settings can be configured according to actual needs.

[0052] Figure 5 The diagram shown is a connection schematic of an illuminance meter body module according to an embodiment of this disclosure. Please refer to it. Figures 1 to 5 In the illuminance uniformity testing device 100 provided in this disclosure, the illuminance meter body 20 includes a data acquisition module 22, a central controller 21, and a communication module 24. The data acquisition module 22 is electrically connected to the flexible test mat 10, and the central controller 21 is electrically connected to the data acquisition module 22 and the communication module 24, respectively. The data acquisition module 22 is used to acquire and store photoelectric signal data of test points 11 in the flexible test mat 10. The central controller 21 includes a calculation module 23, which is used to automatically calculate the illuminance uniformity of the test scene based on the photoelectric signal data. The communication module 24 is used to support wireless transmission of photoelectric signal data and generation of illuminance uniformity reports of the test scene.

[0053] Specifically, the illuminance meter body 20 includes a data acquisition module 22, a central controller 21, and a communication module 24. The data acquisition module 22 uses multi-channel synchronous acquisition technology to support the synchronous reading of data from all test points 11. Alternatively, the data acquisition module 22 supports reading data from test points 11 row by row, column by column, or individual by individual; this disclosure does not limit this. The central controller 21 uses time-division multiplexing (TDM) technology to control the data acquisition module 22 to read data from all test points 11 through a single bus, with a sampling frequency ≥100Hz and a single measurement time <1 second. The calculation module 23 has a built-in national standard algorithm and a built-in GB / T9473-2022 standard calculation model, supporting automatic identification of the coordinates of test points 11, automatic calculation of illuminance uniformity (U0, U1 indicators), elimination of invalid edge areas, and ensuring that the calculation results meet certification requirements. The communication module 24 includes Bluetooth or Wi-Fi, supporting wireless data transmission and report generation (PDF / Excel format). The illuminance meter body 20 also includes a display screen, which displays the test results and anomaly alerts in real time.

[0054] This disclosure provides a workflow for an illuminance meter: Step 1: Unfold the flexible test mat 10 and connect it to the illuminance meter body 20 via USB / wireless connection; the system automatically calibrates to zero. Step 2: Start the measurement; the illuminance meter body 20 synchronously collects data from all test points 11 and displays a heat map in real time. Step 3: The calculation module 23 automatically calculates the average illuminance, minimum / maximum value, and uniformity, and marks areas that do not meet the standards. Step 4: Generate a test report containing the coordinates of the test points 11, the illuminance distribution map, and conclusions.

[0055] This disclosure also provides a manufacturing process for a flexible test mat 10: A hole is made in a silicone substrate (protective layer 13) using laser cutting; a 0.5mm diameter, bend-resistant multimode optical fiber 17 is implanted; and a miniature optical fiber sensor 15 is placed at the hole in the silicone substrate, with each miniature optical fiber sensor 15 connected to a corresponding multimode optical fiber 17. A miniature photodiode 18 is connected to the end of the multimode optical fiber 17. A diffuse reflection coating with a transmittance >90% is applied to the surface, meeting the national standard requirements for the reflectivity of the test surface.

[0056] In summary, the illuminance uniformity testing device disclosed herein includes: an illuminance meter body and a flexible test blanket, the flexible test blanket being electrically connected to the illuminance meter body; the flexible test blanket includes a protective layer, a sensing layer, and a heat insulation layer, the sensing layer being located between the protective layer and the heat insulation layer, the sensing layer including multiple arrayed test points, the test points being used to collect photoelectric signal data at corresponding locations and transmit them to the illuminance meter body; the sensing layer is at least partially embedded inside the protective layer. By combining the flexible test blanket with fiber optic sensing technology, and by combining the flexible substrate material of the protective layer with the bend-resistant multimode fiber, the flexible test blanket can be rolled up and stored (rolling radius ≤ 5cm), while ensuring stable fiber optic transmission performance (loss ≤ 0.2dB / km) after multiple rolls.

[0057] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for testing illuminance uniformity, characterized in that, include: The illuminance meter body and the flexible test blanket are electrically connected to the illuminance meter body. The flexible test blanket includes a protective layer, a sensing layer, and a heat insulation layer. The sensing layer is located between the protective layer and the heat insulation layer. The sensing layer includes multiple test points arranged in an array. The test points are used to collect photoelectric signal data at corresponding locations and transmit it to the illuminance meter body. The sensing layer is at least partially embedded within the protective layer.

2. The illuminance uniformity testing device as described in claim 1, characterized in that, The protective layer includes an inorganic flexible substrate or an organic flexible substrate.

3. The illuminance uniformity testing device as described in claim 1, characterized in that, The heat insulation layer includes a transparent layer located on the side of the sensing layer opposite to the protective layer.

4. The illuminance uniformity testing device as described in claim 1, characterized in that, Each of the test points includes a miniature fiber optic sensor, which is at least partially located inside the protective layer.

5. The illuminance uniformity testing device as described in claim 4, characterized in that, The flexible test blanket also includes a photoelectric conversion module. Each of the miniature fiber optic sensors is connected to the photoelectric conversion module via a multimode fiber. The photoelectric conversion module is electrically connected to the illuminance meter body.

6. The illuminance uniformity testing device as described in claim 1, characterized in that, The flexible test mat includes a first zone and a second zone. The first zone is the central part of the second zone. The area of ​​the figure formed by connecting the test points on the outermost ring of the first zone is less than or equal to 300*500mm. The area of ​​the figure formed by connecting the test points on the outermost ring of the second zone is less than or equal to 500*700mm.

7. The illuminance uniformity testing device as described in claim 5, characterized in that, The flexible test blanket includes an unfolded state and a rolled-up state. In the rolled-up state, the multimode optical fiber in the flexible test blanket is spiral-shaped.

8. The illuminance uniformity testing device as described in claim 7, characterized in that, In the curled state, the curling radius of the flexible test blanket is less than or equal to 5 cm.

9. The illuminance uniformity testing device as described in claim 7, characterized in that, The device includes a storage component for storing the flexible test blanket in its curled state.

10. The illuminance uniformity testing device as described in claim 1, characterized in that, The illuminance meter body includes a data acquisition module, a central controller, and a communication module. The data acquisition module is electrically connected to the flexible test blanket, and the central controller is electrically connected to both the data acquisition module and the communication module. The data acquisition module is used to acquire and store photoelectric signal data of the test points in the flexible test blanket. The central controller also includes a calculation module, which is used to automatically calculate the illuminance uniformity of the test scene based on the photoelectric signal data. The communication module is used to support wireless transmission of photoelectric signal data and the generation of illuminance uniformity reports for the test scene.

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