Rotatable biological recognition equipment illumination detection equipment

Abstract

A rotatable biological recognition device illumination detection device comprises a fixed base (1) comprising a first fixed groove (2); the first fixing groove (2) is used for fixing biological recognition equipment (3); the detection plate (4) comprises a second fixing groove (5); the second fixing groove (5) is used for fixing an illuminometer (6); the support frame (7) is positioned above the fixed base (1) and is fixedly connected with the fixed base (1); the detection plate (4) is connected with the support frame (7) through a universal joint (8), and the universal joint (8) allows the angle adjustment of the detection plate (4) in multiple directions. According to the utility model, the detection angle can be flexibly adjusted, a real illumination scene can be simulated in all directions, the illumination detection device is adaptive to various biological recognition devices (3), and various biological recognition devices (3) can be detected under various illumination conditions.

Description

Technical Field

[0001] This utility model relates to the field of illumination detection technology, specifically, to an illumination detection device for a rotatable biometric device. Background Technology

[0002] With the widespread application of biometric technology, biometric devices (3) such as fingerprint recognition, face recognition, and iris recognition have penetrated into multiple fields such as financial payment, security access control, and smart terminals. In practical application scenarios, ambient lighting conditions have a significant impact on the recognition accuracy, response speed, and reliability of biometric devices (3). Excessive or insufficient lighting may lead to recognition errors or failure to recognize. Therefore, performance testing of biometric devices (3) under different lighting conditions has become a key link in ensuring their quality.

[0003] The illuminance detection of existing biometric devices (3) usually adopts a fixed detection device, which places the illuminance meter (6) and the biometric device (3) at a fixed angle and position for detection. However, this method has obvious drawbacks: on the one hand, it cannot simulate the multi-angle lighting scenarios that the biometric device (3) may face in actual use, such as outdoor oblique light and indoor artificial lighting with complex angles; on the other hand, it is difficult to conduct comprehensive illuminance detection on different surfaces and different areas of the biometric device (3), resulting in the detection results not being able to truly reflect the actual performance of the device in complex lighting environments. In addition, traditional fixed detection devices lack flexibility and cannot adapt to the detection needs of different specifications and types of biometric devices (3), resulting in low detection efficiency.

[0004] Therefore, there is an urgent need for an illuminance detection device that can flexibly adjust the detection angle, fully simulate real lighting scenarios, and adapt to various biometric devices (3) in order to improve the accuracy and comprehensiveness of detection and ensure the reliable operation of biometric devices (3) under various lighting environments.

[0005] The above background information is provided only to aid in understanding the inventive concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] Therefore, this utility model is provided with a fixed base (1) and a detection plate (4). The detection plate (4) is connected to the support frame (7) through a universal joint (8). It can flexibly adjust the detection angle, simulate the real lighting scene in all directions, and adapt to the illumination detection equipment of various biometric devices (3). It can detect various biometric devices (3) under various lighting conditions.

[0007] This utility model provides a rotatable biometric device illumination detection device, characterized in that it includes:

[0008] The fixed base (1) includes a first fixing groove (2); the first fixing groove (2) is used to fix the biometric device (3);

[0009] The detection plate (4) includes a second fixing groove (5); the second fixing groove (5) is used to fix the illuminance meter (6);

[0010] The support frame (7) is located above the fixed base (1) and is fixedly connected to the fixed base (1);

[0011] The detection plate (4) is connected to the support frame (7) via a universal joint (8), which allows the detection plate (4) to be angled in multiple directions.

[0012] Optionally, the rotatable biometric device illumination detection device is characterized in that the fixed base (1) comprises:

[0013] The rotatable platform (9) is connected to the base body (11) via a bearing (10);

[0014] The first fixing groove (2) is fixedly installed on the rotatable platform (9).

[0015] Optionally, the rotatable biometric device illumination detection device is characterized in that the rotatable platform (9) is provided with:

[0016] The manual rotation mechanism (12) includes anti-slip textures or a rotating handle provided on the edge of the rotatable platform (9);

[0017] An angle dial (13) works in conjunction with a pointer on the base body (11) to indicate the rotation angle.

[0018] Optionally, the rotatable biometric device illumination detection device is characterized by further comprising:

[0019] A stepper motor (14) is fixed inside the base body (11);

[0020] A reduction gear set (15) connects the output shaft of the stepper motor (14) to the rotatable platform (9);

[0021] The control panel (16) is equipped with a rotation speed adjustment button (17) and a forward / reverse switch (18).

[0022] Optionally, the rotatable biometric device illumination detection device is characterized in that the universal joint (8) comprises:

[0023] The ball head assembly (19) is fixed to the back of the detection plate (4);

[0024] The ball socket (20) is connected to the top of the support frame (7); the ball head assembly (19) is rotatably engaged in the ball socket (20).

[0025] Optionally, the rotatable biometric device illumination detection device is characterized in that the side wall of the ball socket (20) is provided with a locking knob (21) for fixing the rotation angle of the ball head assembly (19).

[0026] Optionally, the rotatable biometric device illumination detection device is characterized in that an elastic clamping mechanism is provided in the first fixing groove (2), comprising:

[0027] At least two sets of symmetrically distributed spring clips (22);

[0028] Adjustment knob (23) is used to control the clamping force of the spring clip (22).

[0029] Optionally, the rotatable biometric device illuminance detection device is characterized in that the second fixing slot (5) is a detachable slot structure, and the bottom is provided with an adapter interface that matches the illuminance meter (6).

[0030] Optionally, the rotatable biometric device illumination detection device is characterized in that the support frame (7) is a height-adjustable column, comprising:

[0031] The inner tube (24) and outer tube (25) are connected together;

[0032] Positioning holes (26) and pins (27) on the pipe wall.

[0033] Optionally, the rotatable biometric device illumination detection device is characterized by further including an angle scale, located at:

[0034] The outer edge of the universal joint (8) is used to display the horizontal deflection angle of the detection plate (4);

[0035] The edge of the detection plate (4) is used to display the pitch angle of the detection plate (4).

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] In this invention, the detection plate (4) is connected to the support frame (7) via a universal joint (8), allowing for angle adjustment in multiple directions. This simulates various complex lighting angles that the biometric device (3) may encounter in actual use, such as outdoor oblique light and artificial lighting from different directions indoors. Compared to traditional fixed detection devices, this greatly improves the simulation of real lighting environments, making the detection results more practically valuable and enabling accurate evaluation of the performance of the biometric device (3) under different lighting conditions.

[0038] The multi-angle adjustment function of the detection plate (4) in this utility model enables the illuminance meter (6) fixed on it to perform comprehensive illuminance detection on different surfaces and areas of the biometric device (3), avoiding the omission of key areas due to a single detection angle, ensuring the integrity and accuracy of the detection results, and effectively guaranteeing the stable operation of the biometric device (3) under various lighting environments.

[0039] The design of the first fixing groove (2) of the fixed base (1) and the second fixing groove (5) of the detection plate (4) in this utility model can securely fix biometric devices (3) and illuminometers (6) of different specifications and types, respectively, improve the versatility and compatibility of the devices, meet diverse detection needs, and reduce detection costs and equipment replacement frequency.

[0040] This utility model uses a universal joint (8) to quickly adjust the angle of the detection plate (4), eliminating the need for frequent disassembly and reinstallation of the equipment. It can quickly switch between different detection angles and scenarios, significantly shortening the detection time, improving detection efficiency, and adapting to the needs of batch detection and rapid detection. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort. Other features, objects, and advantages of this utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0042] Figure 1 This is a schematic diagram of the structure of a rotatable biometric identification device illumination detection device according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of a fixed base in an embodiment of the present utility model;

[0044] Figure 3 This is a schematic diagram of the structure of a rotatable platform according to an embodiment of the present utility model;

[0045] Figure 4 This is a schematic diagram of another fixed base in an embodiment of this utility model;

[0046] Figure 5 This is a schematic diagram of the structure of a universal joint in an embodiment of this utility model;

[0047] Figure 6 This is a schematic diagram of another universal joint in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of an elastic clamping mechanism in an embodiment of the present utility model;

[0049] Figure 8 This is a schematic diagram of the structure of a support frame in an embodiment of the present utility model. Detailed Implementation

[0050] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0051] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] This utility model provides a rotatable biometric device illumination detection device, which aims to solve the problems existing in the prior art.

[0053] The technical solutions of this utility model and this application solve the above-mentioned technical problems in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0054] This utility model is provided with a fixed base (1) and a detection plate (4). The detection plate (4) is connected to the support frame (7) through a universal joint (8). It can flexibly adjust the detection angle, simulate real lighting scenes in all directions, and is an illuminance detection device for various biometric devices (3). It can detect various biometric devices (3) under various lighting conditions.

[0055] like Figure 1 As shown, an embodiment of the present invention provides a rotatable biometric device illumination detection device, which includes:

[0056] The fixed base (1) includes a first fixed groove (2); the first fixed groove (2) is used to fix the biometric device (3).

[0057] Specifically, the fixed base (1) is the basic component of the entire detection equipment, which plays a role in supporting and stabilizing the equipment. It provides a platform for fixing the biometric device (3), so that the biometric device (3) remains stable during the detection process and will not move or shake easily, thereby ensuring the accuracy of the illuminance detection.

[0058] The base (1) is provided with a first fixing groove (2), the shape and size of which are adapted to the biometric device (3) so as to secure the biometric device (3) tightly. For example, if the biometric device (3) is rectangular, the internal shape of the first fixing groove (2) will also be a corresponding rectangle, and the size of the groove will be slightly larger than that of the biometric device (3) so that the device can be smoothly placed and fixed, while ensuring that the device will not loosen in the groove.

[0059] To ensure sufficient stability and durability, the fixed base (1) is usually made of high-strength materials, such as metal (aluminum alloy, steel, etc.) or high-quality engineering plastics. Metal bases have good strength and resistance to deformation, and can withstand greater weight and external forces; while engineering plastic bases have the advantages of being lightweight, low-cost, and corrosion-resistant.

[0060] The detection plate (4) includes a second fixing groove (5); the second fixing groove (5) is used to fix the illuminance meter (6).

[0061] Specifically, the main function of the detection board (4) is to fix the illuminance meter (6) and provide a suitable installation position for the illuminance meter (6) so as to accurately detect the illuminance around the biometric device (3). By fixing the illuminance meter (6), the illuminance meter (6) can maintain a stable position and angle during the detection process, thereby obtaining accurate illuminance data.

[0062] The detection plate (4) is provided with a second fixing groove (5), the design of which is also determined according to the shape and size of the illuminance meter (6) to ensure that the illuminance meter (6) can be firmly installed on the detection plate (4). In addition to the fixing groove, the surface of the detection plate (4) may also have some markings or scales to assist in adjusting the position or angle of the illuminance meter (6) for convenient and accurate detection operations.

[0063] The material of the detection plate (4) also needs to have a certain strength and stability to ensure that the illuminance meter (6) can be reliably fixed. At the same time, in order to reduce the overall weight of the equipment, some lightweight materials, such as plastic or aluminum alloy, may be selected. In addition, the surface of the detection plate (4) may be treated, such as frosting, to increase friction and prevent the illuminance meter (6) from sliding on the detection plate (4).

[0064] A support frame (7) is located above the fixed base (1) and is fixedly connected to the fixed base (1). The detection plate (4) is connected to the support frame (7) via a universal joint (8), which allows the detection plate (4) to be adjusted in multiple directions.

[0065] Specifically, the support frame (7) is located above the fixed base (1) and serves to connect the fixed base (1) and the detection plate (4). It also provides a certain height and space for the detection plate (4) so ​​that the detection plate (4) can perform illuminance detection in a suitable position. It supports the detection plate (4) above the fixed base (1) so that the detection plate (4) and the biometric device (3) are kept at a certain distance so that the illuminance on the surface of the biometric device (3) can be accurately detected.

[0066] The support frame (7) is fixedly connected to the fixed base (1). The connection method can be bolt connection, welding or other suitable fixing method to ensure the stability and firmness of the support frame (7). The height and shape of the support frame (7) are designed according to the actual testing requirements and equipment layout. It is usually designed to have a certain rigidity and strength to withstand the weight of the test plate (4) and the illuminometer (6) as well as the external forces that may be generated during the testing process.

[0067] Similar to the fixed base (1), the support frame (7) is also made of a high-strength material, such as metal or engineering plastic. The metal support frame (7) can provide better rigidity and stability, and is suitable for situations that need to withstand large weight or external force; while the engineering plastic support frame (7) has the advantages of low cost and light weight, and is suitable for some occasions with high requirements for weight and cost.

[0068] The universal joint (8) is a key component connecting the detection plate (4) and the support frame (7), allowing the detection plate (4) to be adjusted in multiple directions. Through the flexible rotation of the universal joint (8), the detection plate (4) can be adjusted to different angles and positions to adapt to different detection needs. For example, the detection plate (4) can be adjusted to an angle parallel to the surface of the biometric device (3) to more accurately detect the illuminance on the surface of the biometric device (3); it can also be adjusted to other angles to detect the illuminance in different directions around the biometric device (3).

[0069] A universal joint (8) is typically composed of multiple rotatable parts that are interconnected by means of shafts or pins, forming a structure that can rotate in multiple degrees of freedom. Its design needs to ensure the flexibility and stability of rotation, while also being able to withstand the weight of the detection plate (4) and the illuminance meter (6) as well as the torque that may be generated during rotation.

[0070] To ensure the rotational performance and durability of the universal joint (8), wear-resistant and corrosion-resistant materials such as metals (stainless steel, copper alloys, etc.) or high-quality engineering plastics are usually selected. Metal universal joints (8) have high strength and wear resistance and can withstand large torque and external forces; while engineering plastic universal joints (8) have the advantages of light weight, low cost and good self-lubrication, and are suitable for some occasions with high requirements for weight and cost.

[0071] In some embodiments, the fixed base (1) includes:

[0072] The rotatable platform (9) is connected to the base body (11) via a bearing (10).

[0073] Specifically, the rotatable platform (9) breaks the static limitations of the traditional fixed base (1), allowing the biometric device (3) to rotate flexibly during the detection process. By rotating the biometric device (3) fixed on it, illumination detection of the biometric device (3) can be performed from multiple angles and directions, simulating the illumination conditions of the biometric device (3) under different placement states in actual use scenarios, effectively improving the comprehensiveness and accuracy of the detection. For example, when detecting a face recognition device, the orientation of the device can be changed by rotating the platform to detect the impact of different illumination directions on the device's recognition performance.

[0074] As a key moving component of the fixed base (1), it is relatively independent of the base body (11) yet works in conjunction with it. The platform surface is flat and tightly connected to the first fixing slot (2), ensuring that the biometric device (3) fixed in the first fixing slot (2) remains stable during rotation. Its size depends on the size of the biometric device (3) and the overall design requirements of the device, and is usually slightly larger than the first fixing slot (2) to leave enough space for device installation and rotation.

[0075] To ensure smooth rotation and long-term stability, rotating platforms (9) are often made of high-strength, low-friction materials. For example, aluminum alloys are lightweight, high-strength, and corrosion-resistant, which can effectively reduce the inertia of the platform during rotation and reduce wear. Engineering plastics, such as polyoxymethylene (POM), are also used, which have good self-lubricating properties and excellent wear resistance, ensuring stable rotation of the platform for a long time.

[0076] The bearing (10), as the connecting hub between the rotatable platform (9) and the base body (11), is the core component for enabling the platform to rotate flexibly. It can effectively reduce the frictional resistance between the rotatable platform (9) and the base body (11), making the platform more stable and smooth during rotation, reducing wear and energy loss caused by friction, and extending the service life of the equipment. At the same time, the bearing (10) can also bear the weight of the rotatable platform (9) and the biometric device (3), as well as the radial and axial forces generated during rotation, ensuring the rotational accuracy and stability of the rotating platform.

[0077] A bearing (10) generally consists of an inner ring, an outer ring, rolling elements, and a cage. The inner ring fits tightly with the rotatable platform (9), and the outer ring is fixedly connected to the base body (11). The rolling elements roll between the inner and outer rings, and the cage is used to evenly separate the rolling elements to prevent them from colliding and rubbing against each other. Depending on the actual usage requirements, different types of bearings (10) may be selected, such as deep groove ball bearings (10), which are suitable for bearing small radial loads and certain axial loads, and can meet the rotation requirements of the rotatable platform (9) under normal circumstances; tapered roller bearings (10) can bear large combined radial and axial loads and are suitable for occasions with high load-bearing capacity requirements.

[0078] The material of the bearing (10) directly affects its performance and service life. Usually, the inner ring, outer ring and rolling elements are made of high carbon chromium bearing (10) steel. This steel has high hardness, high wear resistance and good contact fatigue strength, and can withstand frequent rotation and load. The cage is generally made of low carbon steel, copper alloy or engineering plastics to ensure its strength and wear resistance, while reducing the overall weight of the bearing (10).

[0079] The first fixing groove (2) is fixedly installed on the rotatable platform (9).

[0080] Specifically, based on the rotatable platform (9), the first fixing slot (2) still bears the important responsibility of fixing the biometric device (3). No matter how the rotatable platform (9) rotates, the first fixing slot (2) must ensure that the biometric device (3) is securely installed, preventing the device from shifting, loosening or even falling off during rotation, thereby ensuring the accuracy and reliability of the illuminance detection data.

[0081] The first fixing groove (2) is fixedly installed on the rotatable platform (9). Its shape and size are adapted to the height of the biometric device (3), and the groove may be provided with elastic cushioning material or anti-slip texture. For example, for the irregularly shaped biometric device (3), the first fixing groove (2) can be designed as a contour-following structure, which fits the contour of the device through multiple protrusions or recesses; for some devices that require precise positioning, positioning pins or slots may be provided in the groove to ensure the accuracy of the device installation position.

[0082] The material of the first fixing groove (2) needs to have a certain strength and toughness to ensure the firm fixation of the biometric device (3). At the same time, in order to avoid damage to the surface of the biometric device (3), a softer material, such as rubber or silicone, is usually selected as the inner lining material; while the outer frame can be made of metal or high-strength plastic to provide sufficient support and stability.

[0083] In some embodiments, the rotatable platform (9) is provided with:

[0084] The manual rotation mechanism (12) includes anti-slip textures or a rotating handle provided on the edge of the rotatable platform (9).

[0085] Specifically, the manual rotation mechanism (12) provides users with a convenient way to operate, allowing the rotation of the rotatable platform (9) to be easily achieved manually. The design of the anti-slip texture or rotating handle effectively enhances the user's grip and control during rotation, preventing slippage during rotation and ensuring that the angle of the rotatable platform (9) can be adjusted accurately and stably, thereby enabling illumination detection of the biometric device (3) in different directions.

[0086] Anti-slip textures are typically machined directly onto the edge surface of the rotatable platform (9) in regular or irregular patterns. The depth, spacing, and shape of the textures are carefully designed to achieve the best anti-slip effect. The rotating handle is an independent component, fixed to the edge of the rotatable platform (9) by welding, bolting, or other methods. The handle's shape is ergonomically designed for easy gripping, and its length and width are moderate, ensuring that users can easily apply force during operation and achieve smooth platform rotation.

[0087] For the anti-slip textured parts, wear-resistant and anti-slip materials such as rubber and silicone are often used to ensure good anti-slip performance and durability. These materials not only have high surface friction but also have a certain degree of elasticity, which can maintain the anti-slip effect during long-term use. The material of the rotating handle needs to balance strength and comfort. Metal materials (such as aluminum alloy) have high strength and can withstand greater rotational forces; while the surface of the handle may be covered with a layer of rubber or soft plastic to increase grip comfort and anti-slip properties.

[0088] An angle dial (13) works in conjunction with a pointer on the base body (11) to indicate the rotation angle.

[0089] Specifically, the angle dial (13) works in conjunction with the pointer on the base body (11) to intuitively and accurately indicate the rotation angle of the rotatable platform (9). This design allows users to clearly understand the current angular position of the biometric device (3) during operation, enabling them to perform illumination detection on the biometric device (3) at different angles according to predetermined detection requirements, and to easily compare the detection data at different angles, providing accurate angular basis for subsequent data analysis and processing.

[0090] The angle dial (13) is usually circular and is fixedly mounted on the rotatable platform (9). Its scale is evenly distributed around the center of the circle, and the scale value is set according to the actual testing requirements. Common scale accuracies are 1° or 5°, etc. The scale lines on the dial are clear and conspicuous, making it easy for users to read. The pointer on the base body (11) is fixed and its tip is accurately aligned with the angle dial (13). When the rotatable platform (9) rotates, the rotation angle of the platform can be determined by the relative position of the pointer and the scale on the dial.

[0091] The material of the angle dial (13) is required to have good wear resistance and clear scale display effect. Generally, plastic or metal materials are selected. Plastic dials are less expensive, and the surface can be made with clear scales and numbers through printing, spraying and other processes. Metal dials have higher strength and wear resistance. The scale is usually made through etching, laser engraving and other processes, which can keep it clear and accurate for a long time and are not easy to wear or fade.

[0092] In some embodiments, the rotatable biometric device illumination detection device further includes:

[0093] The stepper motor (14) is fixed inside the base body (11).

[0094] Specifically, the stepper motor (14) is the core power component for realizing the automated rotation of the rotatable platform (9). It can convert electrical pulse signals into angular or linear displacement, and precisely control the angle and number of steps of the rotatable platform (9) by receiving pulse signals of a specific frequency and number. During the illumination detection process, the operating parameters of the motor can be set by programming or the control panel (16) according to the detection requirements, so that the rotatable platform (9) rotates at a predetermined angle and speed, realizing automated and precise detection operation, avoiding errors that may be caused by manual operation, and improving detection efficiency and accuracy.

[0095] A stepper motor (14) mainly consists of two parts: a stator and a rotor. The stator has multiple windings. By energizing the windings in a certain sequence, magnetic fields in different directions are generated, thereby driving the rotor to rotate. The rotor is usually made of permanent magnet material or soft magnetic material, and rotates according to a predetermined step angle under the action of the stator's magnetic field. The motor casing is generally made of metal, which serves to protect the internal structure and dissipate heat.

[0096] The stator windings are typically made of high-purity enameled wire to ensure good conductivity and insulation. The rotor's permanent magnets are often made of high-performance magnetic materials such as neodymium iron boron, which feature high remanence, high coercivity, and high energy product, providing a strong magnetic field to ensure the motor's output torque and accuracy. The housing material is generally made of aluminum alloy or steel. Aluminum alloy has the advantages of being lightweight and having good heat dissipation, while steel has higher strength and protective properties.

[0097] A reduction gear set (15) connects the output shaft of the stepper motor (14) to the rotatable platform (9).

[0098] Specifically, the reduction gear set (15) connects the output shaft of the stepper motor (14) to the rotatable platform (9), thereby reducing the rotational speed and increasing the torque. Since the stepper motor (14) typically outputs a high rotational speed but relatively low torque, while the rotatable platform (9) requires a large torque to drive the biometric device (3) to rotate smoothly, and at the same time requires a low rotational speed to ensure the accuracy and stability of the detection, the reduction gear set (15) converts the high rotational speed of the stepper motor (14) into the low rotational speed required by the rotatable platform (9) through the meshing transmission between the gears, and increases the torque accordingly, so that the rotatable platform (9) can rotate stably and accurately according to the predetermined speed and angle.

[0099] The reduction gear set (15) consists of multiple gears with different numbers of teeth, which are mounted in a gearbox inside the base body (11) via shafts and bearings (10). The gear ratio determines the reduction ratio, and different reduction effects can be achieved by rationally designing the number of teeth and the combination of gears. The gears are precisely meshed to ensure the smoothness and accuracy of power transmission. The gearbox design effectively protects the gears, preventing dust and impurities from entering, while also providing lubrication and heat dissipation.

[0100] Gears are typically made of high-strength, wear-resistant alloy steel, such as 20CrMnTi and 40Cr. These steels undergo heat treatment processes such as carburizing, quenching, and tempering, resulting in high hardness, strength, and wear resistance, enabling them to withstand significant loads and impacts. The gearbox housing is generally made of aluminum alloy or cast iron. Aluminum alloy is lightweight and has good heat dissipation, while cast iron has high strength and rigidity, providing excellent support and protection for the gears.

[0101] The control panel (16) is equipped with a rotation speed adjustment button (17) and a forward / reverse switch (18).

[0102] Specifically, the control panel (16) is an important interface for users to interact with the device. By setting the rotation speed adjustment button (17) and the forward / reverse switch (18), users can conveniently and intuitively control the rotation speed and direction of the rotatable platform (9). The rotation speed adjustment button (17) can finely adjust the rotation speed of the rotatable platform (9) according to different detection needs to adapt to the requirements of different biometric devices (3) and detection scenarios; the forward / reverse switch (18) can realize the forward and reverse rotation of the rotatable platform (9) to meet diverse detection operation needs and make the detection process more flexible and efficient.

[0103] The control panel (16) is generally made of plastic or metal as its outer shell, and integrates various electronic components and circuit boards inside. The rotation speed adjustment button (17) is usually designed as a knob or a button. The knob adjustment is more intuitive and convenient, and can continuously adjust the speed; the button adjustment can achieve precise speed setting. The forward and reverse switch (18) is generally a toggle switch or a push-button switch, which is simple and reliable to operate. The control panel (16) may also be equipped with indicator lights to display the working status of the equipment, such as power indicator lights and running indicator lights, so that users can understand the operation of the equipment.

[0104] The casing material of the control panel (16) needs to have good insulation performance, mechanical strength, and aesthetics. Plastic materials (such as ABS, PC, etc.) have the advantages of low cost, good processing performance, and excellent insulation performance, and are often used in the control panels (16) of ordinary equipment; metal materials (such as aluminum alloy, stainless steel, etc.) have higher strength, protection performance, and texture, and are suitable for equipment with high requirements for protection level and appearance. The internal electronic components and circuit boards are made of high-quality materials that meet electrical performance requirements to ensure the stability and reliability of the control panel (16).

[0105] In some embodiments, the universal joint (8) includes:

[0106] The ball head assembly (19) is fixed to the back of the detection plate (4).

[0107] Specifically, the ball head assembly (19) is fixed to the back of the detection plate (4) and is an important structural basis for realizing the multi-angle rotation of the detection plate (4). It works in conjunction with the ball socket (20) to give the detection plate (4) the ability to rotate freely around multiple axes in space, so that the detection plate (4) can be adjusted to any suitable angle and orientation according to the different detection needs of the biometric device (3), ensuring that the illuminometer (6) can accurately measure the light intensity on the surface and around the biometric device (3) from different directions, providing great flexibility and convenience for the detection work.

[0108] The ball head assembly (19) typically consists of a spherical head and a connecting part. The spherical head is the key component, with a smooth surface and precise spherical curvature to ensure a tight and smooth rotation with the ball socket (20). The connecting part is used to securely fix the ball head assembly (19) to the back of the detection plate (4). The connection method can be welding, bolting, or embedded installation, ensuring that the ball head assembly (19) will not loosen or fall off during the rotation of the detection plate (4). To enhance the flexibility of rotation and reduce friction, the surface of the ball head may also be polished or even coated with a friction-reducing coating.

[0109] Considering the need to withstand certain pressure and friction while ensuring long-term stability and wear resistance, the ball joint assembly (19) is often made of high-strength and wear-resistant metal materials, such as stainless steel and copper alloys. Stainless steel has good corrosion resistance and strength, and can adapt to various complex operating environments; copper alloys have good self-lubricating properties, which can reduce friction between the ball joint assembly and the ball socket (20), making the rotation smoother. In addition, in some cases where weight is a strict requirement, high-strength engineering plastics may be used to make the ball joint assembly (19) to reduce the overall weight of the equipment.

[0110] The ball socket (20) is connected to the top of the support frame (7); the ball head assembly (19) is rotatably engaged in the ball socket (20).

[0111] Specifically, the ball joint seat (20) is connected to the top of the support frame (7), providing a space for the ball head assembly (19) to be accommodated and supported, and together with the ball head assembly (19), they form the rotation structure of the universal joint (8). It limits the range of motion of the ball head assembly (19), while allowing the ball head assembly (19) to rotate freely inside it, thereby realizing the angle adjustment of the detection plate (4) in multiple directions. The presence of the ball joint seat (20) ensures the stability and reliability of the detection plate (4) during rotation, so that the illuminance meter (6) can maintain an accurate measurement position at different angles.

[0112] The internal shape of the ball socket (20) is a spherical recess that matches the ball head assembly (19). Its size is slightly larger than the spherical head of the ball head assembly (19) to ensure that the ball head can rotate freely within it without creating excessive clearance that would affect rotational accuracy. The ball socket (20) has an external connecting structure for fixed connection with the top of the support frame (7). The connection method can be threaded connection, flange connection, etc., to ensure a firm connection between the ball socket (20) and the support frame (7). The surface of the ball socket (20) may undergo some treatment, such as hard chrome plating, to improve its wear resistance and corrosion resistance.

[0113] The ball joint seat (20) also needs to be made of materials with high strength, wear resistance and corrosion resistance. Common materials include metal materials, such as cast iron and aluminum alloys. Cast iron has high strength and rigidity and can withstand greater pressure; aluminum alloys have the advantages of light weight and good heat dissipation, while also having certain strength and corrosion resistance. In some special applications, ceramic materials may also be used to make the ball joint seat (20). Ceramic materials have the advantages of high hardness, good wear resistance and strong chemical stability, which can significantly improve the service life and performance of the universal joint (8).

[0114] In some embodiments, the ball socket (20) has a locking knob (21) on its side wall for fixing the rotation angle of the ball head assembly (19).

[0115] The core function of the locking knob (21) is to fix the ball head assembly (19) in the ball socket (20) after the detection plate (4) is adjusted to a suitable angle, preventing the detection plate (4) from shifting at an angle due to external force or its own weight, and ensuring that the illuminance meter (6) maintains an accurate measurement angle and position during the detection process. When performing illuminance detection on the biometric device (3), the user adjusts the detection plate (4) to a specific angle according to the detection requirements, and then tightens the locking knob (21) to stabilize the detection plate (4) at that angle, avoiding inaccurate detection data due to angle changes, thereby improving the reliability and repeatability of the detection results.

[0116] The locking knob (21) typically consists of a knob body, a screw, and a washer. The knob body is designed for easy gripping and operation, and its surface may be designed with anti-slip textures or raised and recessed shapes to facilitate tightening or loosening. One end of the screw is fixedly connected to the knob body, and the other end passes through a pre-machined threaded hole on the side wall of the ball joint (20) and extends into the ball joint (20). When the knob is rotated, the screw will move linearly along the threaded hole, pressing against the ball joint assembly (19), thereby generating friction to fix the ball joint assembly (19). The washer is installed at the end where the screw contacts the ball joint assembly (19), which increases the contact area, prevents the screw from damaging the surface of the ball joint assembly (19), and makes the pressure distribution more uniform, ensuring the fixing effect.

[0117] The knob body is generally made of engineering plastic or metal. Engineering plastics (such as ABS, nylon, etc.) are low in cost, easy to mold, and have certain strength and wear resistance. Various anti-slip textures can be made on the surface through injection molding. Metal materials (such as aluminum alloy, stainless steel) have higher strength, better texture, and excellent wear resistance and corrosion resistance, making them suitable for scenarios with high durability requirements. The screw is usually made of metal, such as stainless steel or carbon steel, and is heat-treated to improve its strength and hardness, ensuring that it will not deform or break during tightening. The gaskets are mostly made of rubber, silicone or soft metal materials. Rubber and silicone gaskets have good elasticity and can effectively buffer pressure and prevent damage to the ball head assembly (19). Soft metal gaskets (such as copper sheets) have good wear resistance and pressure resistance and can adapt to long-term frequent use.

[0118] In some embodiments, the first fixing groove (2) is provided with an elastic clamping mechanism, including:

[0119] At least two sets of symmetrically distributed spring clips (22).

[0120] Specifically, the spring clips (22), as the core actuator of the elastic clamping mechanism, primarily function to clamp and fix the biometric device (3) through their own elastic deformation. The design of at least two symmetrically distributed sets allows for the application of balanced clamping forces from multiple directions, ensuring that the device will not shift or shake during the detection process due to external forces or the rotation of the rotatable platform (9). Simultaneously, the elastic properties of the spring clips (22) enable them to adapt to biometric devices (3) of different sizes, providing a stable fixing effect by deforming to fit the device's edge, thus meeting diverse detection needs.

[0121] Each set of spring clips (22) is typically composed of one or more elastic metal or plastic sheets, with one end fixed to the inner wall of the first fixing groove (2) and the other end being a free end that can bend elastically under force. Metal spring clips (22) are generally made using a stamping process, which provides high elastic strength and durability; plastic spring clips (22) are made using injection molding, which provides good flexibility and corrosion resistance. The free end of the clip is usually designed to be arc-shaped or have anti-slip textures to increase the contact area and friction with the surface of the biometric device (3), further improving the stability of the clamping.

[0122] Metal spring clips (22) are often made of stainless steel, spring steel, etc. Stainless steel has good corrosion resistance and strength, and is suitable for a variety of working environments; spring steel has high elastic limit and fatigue strength, and can maintain stable elastic performance during long-term use. Plastic spring clips (22) are mostly made of engineering plastics such as polyoxymethylene (POM) and polyurethane (PU). These materials have good elasticity, wear resistance and self-lubrication, are lightweight and low cost, and can also avoid scratching the surface of biometric devices (3).

[0123] Adjustment knob (23) is used to control the clamping force of the spring clip (22).

[0124] Specifically, the adjustment knob (23) is used to precisely control the clamping force of the spring clip (22), enabling the elastic clamping mechanism to flexibly adjust the fixing strength according to the material, size, and detection requirements of different biometric devices (3). Users can change the degree of deformation of the spring clip (22) by rotating the adjustment knob (23), thereby changing the magnitude of the clamping force. For biometric devices (3) with relatively fragile surfaces, the clamping force can be appropriately reduced to avoid damage to the device; for larger and heavier devices, the clamping force can be increased to ensure that the device is firmly fixed during the detection process, providing a guarantee for accurate illumination detection.

[0125] The adjustment knob (23) typically consists of a knob body, an adjustment screw, and a transmission mechanism. The knob body is easy for the user to operate, and its surface may be designed with anti-slip textures or scale markings to facilitate the user's control of the rotation angle and force. The adjustment screw is connected to the knob body and is connected to the spring clip (22) or related transmission components through a threaded drive. When the knob is rotated, the adjustment screw moves axially, causing the spring clip (22) to deform, thereby adjusting the clamping force. The transmission mechanism can be a simple linkage mechanism or a more complex structure such as gear transmission, used to accurately transmit the movement of the adjustment screw to the spring clip (22) to ensure the accuracy and stability of the adjustment.

[0126] The main body of the knob is generally made of engineering plastic or metal. Knobs made of engineering plastic are less expensive, easier to process, and have good insulation and a certain degree of strength; knobs made of metal have a better feel, higher strength and durability, and are suitable for applications requiring high tactile feedback and long service life. The adjusting screw is usually made of metal, such as stainless steel or carbon steel, and is heat-treated to improve its strength and wear resistance, ensuring that it will not wear or be damaged during frequent adjustments. The components of the transmission mechanism can be made of metal, plastic, or composite materials, depending on the specific structure and performance requirements, to ensure the accuracy and reliability of the transmission.

[0127] In some embodiments, the second fixing groove (5) is a detachable slot structure with an adapter interface at the bottom that matches the illuminance meter (6).

[0128] The detachable slot structure gives the second fixed slot (5) a high degree of flexibility and versatility. On the one hand, it facilitates the installation and removal of the illuminance meter (6). When it is necessary to replace the illuminance meter (6) for different precision testing, equipment maintenance, or use the illuminance meter (6) in other testing scenarios, the operation can be completed quickly and conveniently, saving time and costs. On the other hand, various adapter slots can be designed according to different models and specifications of illuminance meters (6), so that one testing board (4) can be used for multiple illuminance meters (6), reducing equipment purchase costs and improving the practicality and expandability of the testing equipment.

[0129] The slot is typically composed of two symmetrical locking arms. The inner side of the locking arms has a protrusion or barb structure that engages with the groove or slot on the outer shell of the illuminance meter (6) to form a locking and fixing mechanism. The locking arms have a certain degree of elasticity. When installing the illuminance meter (6), the protrusion or barb is aligned with the slot by pressing the locking arm. After releasing the arm, it returns to its original position, achieving a firm fixation. When disassembling, the locking arm is pressed again to release the locking state and the illuminance meter (6) can be removed. The slot and the detection plate (4) are detachably installed by means of threaded connection, snap-fit ​​connection or magnetic connection. For example, threaded connection has strong stability, snap-fit ​​connection is easy to operate, and magnetic connection is convenient for quick installation and removal.

[0130] The clamping arm is mostly made of engineering plastics with good elasticity, such as polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS). These materials have good toughness and wear resistance, and can maintain elasticity and structural integrity during frequent installation and disassembly. If the main body of the clamping slot uses a threaded connection, a high-strength metal material (such as aluminum alloy or stainless steel) may be selected to ensure the stability of the connection. If it is a snap-fit ​​or magnetic connection, plastic or lightweight alloy materials can be selected to reduce the overall weight.

[0131] The adapter interface is located at the bottom of the second fixing slot (5). Its core function is to ensure precise docking between the illuminance meter (6) and the testing equipment, ensuring that the illuminance meter (6) can work normally after being fixed, and accurately transmitting the test data to the equipment's control system or data recording device. By precisely matching the shape, size, and electrical connection method of the interface at the bottom of the illuminance meter (6), problems such as data transmission errors and equipment failure to supply power due to poor contact or interface incompatibility are avoided, thus ensuring the accuracy and reliability of illuminance testing.

[0132] The structure of the adapter interface depends on the type of illuminance meter (6). For wired illuminance meters (6), the adapter interface may include electrical connection terminals such as power pins and data transmission pins, as well as clips or latches for securing the cable. For wireless illuminance meters (6), the adapter interface may integrate the antenna of the wireless communication module, charging contacts, and other structures. The shape of the interface must be precisely matched with the plug or contacts at the bottom of the illuminance meter (6), such as a round, square, or custom-shaped interface, to ensure a tight and stable connection.

[0133] Electrical connection terminals are typically made of highly conductive and oxidation-resistant metal materials, such as gold-plated copper, to ensure good electrical contact performance and service life. The interface housing can be made of engineering plastics (such as nylon) with good insulation and high strength to prevent short circuits and protect the internal connection structure. For interfaces that require frequent plugging and unplugging, a wear-resistant coating may be applied to the surface to improve durability.

[0134] In some embodiments, the support frame (7) is a height-adjustable column, comprising:

[0135] The inner tube (24) and outer tube (25) are connected together.

[0136] Specifically, the telescopic structure formed by the inner tube (24) and the outer tube (25) is the core of the height adjustment of the support frame (7). During the illuminance detection process, different specifications of biometric devices (3) or specific detection scenarios may have different requirements for the distance between the detection plate (4) and the device. By telescoping the inner tube (24) inside the outer tube (25), the overall height of the support frame (7) can be flexibly adjusted to ensure that the illuminance meter (6) on the detection plate (4) is in the optimal detection position and obtains accurate illuminance data. For example, when detecting large biometric devices (3), the inner tube (24) can be stretched to increase the height; when detecting small devices, the height can be shortened to ensure the accuracy of the detection.

[0137] The inner diameter of the outer tube (25) is slightly larger than the outer diameter of the inner tube (24), allowing the inner tube (24) to slide smoothly within the outer tube (25). The walls of the inner tube (24) and the outer tube (25) need to have sufficient thickness and strength to support the weight of components such as the detection plate (4), the illuminometer (6), and the universal joint (8), while ensuring that they do not deform during height adjustment. The lengths of the inner tube (24) and the outer tube (25) are designed according to actual usage requirements. Typically, the outer tube (25) is longer to provide sufficient extension space for the inner tube (24). In addition, the inner and outer walls of the inner tube (24) and the outer tube (25) may be smoothed to reduce friction during sliding and improve the smoothness of height adjustment.

[0138] To ensure the strength and stability of the support frame (7), the inner tube (24) and outer tube (25) are mostly made of metal materials, such as aluminum alloy and stainless steel. Aluminum alloy is lightweight, high-strength, and corrosion-resistant, making it easy to carry and use for a long time; stainless steel has higher strength and wear resistance, making it suitable for scenarios with high load-bearing requirements. In some cases where weight is strictly limited, high-strength engineering plastics may also be used to make the inner tube (24) and outer tube (25) to reduce the overall weight of the equipment.

[0139] Positioning holes (26) and pins (27) on the pipe wall.

[0140] Specifically, the positioning hole (26) and the pin (27) are key components for fixing the relative positions of the inner tube (24) and the outer tube (25), ensuring that the support frame (7) remains stable after being adjusted to a suitable height and that its height does not change due to external forces or the weight of the components. When adjusting the height of the support frame (7), the inner tube (24) is stretched or retracted to the desired position, and then the pin (27) is inserted into the corresponding positioning hole (26) to lock the positions of the inner tube (24) and the outer tube (25), so that the support frame (7) maintains a fixed height and provides a stable support structure for illuminance detection.

[0141] Positioning holes (26) are evenly distributed on the walls of the inner tube (24) and the outer tube (25). The diameter of the holes matches the diameter of the pin (27) to ensure that the pin (27) can be tightly inserted into the positioning holes (26). The pin (27) usually consists of a pin body and a handle. One end of the pin body is pointed to facilitate insertion into the positioning hole (26); the handle at the other end is convenient for user operation and easy insertion and removal. To prevent the pin (27) from accidentally falling off during use, a spring lock or retaining ring structure may be provided on the pin (27) to ensure that the pin (27) is firmly fixed in the positioning hole (26).

[0142] The inner tube (24) and outer tube (25) containing the positioning hole (26) are made of high-strength materials, while the pin (27) is generally made of metal, such as stainless steel or carbon steel, to ensure sufficient strength and wear resistance. Stainless steel pins (27) have good corrosion resistance and are suitable for various environments; carbon steel pins (27) can obtain higher strength and hardness after heat treatment and can withstand greater tension and pressure. The handle may be made of engineering plastic or rubber to increase grip comfort and anti-slip properties.

[0143] In some embodiments, the rotatable biometric device illumination detection device is characterized by further including an angle scale, located at:

[0144] The outer edge of the universal joint (8) is used to display the horizontal deflection angle of the detection plate (4).

[0145] Specifically, the angle scale is mainly used to accurately display the horizontal deflection angle of the detection plate (4). During the illumination detection process, the biometric device (3) may need to receive illumination detection from different horizontal directions. By observing the angle scale on the outer edge of the universal joint (8), the operator can intuitively obtain the horizontal rotation angle of the detection plate (4) relative to the initial position, ensuring that each horizontal deflection operation can reach the preset angle, thereby achieving accurate illumination detection of the biometric device (3) from all directions and multiple angles, and improving the accuracy and consistency of the detection results.

[0146] Angle scales are typically ring-shaped and fit snugly against the outer edge of the universal joint (8). The scale is evenly distributed around the center, with common accuracy values ​​of 1° or 5°. The scale lines are clear and easily visible, facilitating quick reading by operators. The scale may also be marked with angle values ​​and direction indicators (such as a 0° starting line and clockwise / counterclockwise arrows) to help operators determine the rotation direction and specific angle of the detection plate (4). To ensure the scale does not shift during the rotation of the universal joint (8), it is fixed using methods such as gluing, embedding, or integrated molding.

[0147] Considering that the universal joint (8) will rotate frequently during use, the angle scale needs to have good wear resistance and clear and durable graduations. Usually, metal materials (such as stainless steel and aluminum alloy) or engineering plastics (such as polycarbonate) are selected. Metal scales are made with etching, laser engraving and other processes to make the graduations, which have high wear resistance and scratch resistance; engineering plastic scales are made with printing, injection molding and other methods to form the graduations, which are lower in cost and have a certain degree of toughness, and can meet the rotation requirements of the universal joint (8).

[0148] The edge of the detection plate (4) is used to display the pitch angle of the detection plate (4).

[0149] Specifically, the angle scale on the edge of the detection plate (4) is used to display the pitch angle of the detection plate (4), helping the operator to accurately control the degree of tilt of the detection plate (4) relative to the horizontal plane. Different biometric devices (3) have different requirements for the pitch angle of illumination. This scale allows the operator to accurately adjust the detection plate (4) to a suitable pitch angle according to the detection needs, ensuring that the illuminometer (6) can perform illumination detection on the biometric device (3) from the best angle, and avoiding errors in the detection data due to pitch angle deviation.

[0150] The angle scale is generally a strip structure, arranged along the edge of the detection plate (4), and is usually installed on the side or bottom edge of the detection plate (4). Its scale is also clear and distinct, with the scale lines parallel to or at a certain angle to the edge of the detection plate (4), making it easy for the operator to observe when adjusting the pitch angle of the detection plate (4). To enhance the convenience of reading, in addition to the scale lines, the scale may also be equipped with angle indicator marks (such as pointers, sliders, etc.). As the detection plate (4) pitches and rotates, the indicator marks will correspond to different scale values, intuitively displaying the current pitch angle.

[0151] The material selection for the angle scale on the edge of the detection plate (4) is similar to that of the scale on the outer edge of the universal joint (8), requiring a balance between durability and visibility. Metal scales can be made with processes such as stamping and etching to ensure that they are not easily worn during long-term use; scales made of engineering plastics are made with processes such as injection molding and spraying to form the scale, which has the advantages of being lightweight and low-cost. In addition, to prevent the scale from becoming blurred due to environmental factors (such as moisture and oxidation), a layer of transparent protective paint or film may be coated on the scale surface to improve the clarity and durability of the scale.

[0152] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. 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 invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0153] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A rotatable biometric device illumination detection device, characterized in that, include: The fixed base (1) includes a first fixing groove (2); the first fixing groove (2) is used to fix the biometric device (3); The detection plate (4) includes a second fixing groove (5); the second fixing groove (5) is used to fix the illuminance meter (6); The support frame (7) is located above the fixed base (1) and is fixedly connected to the fixed base (1); The detection plate (4) is connected to the support frame (7) via a universal joint (8), which allows the detection plate (4) to be angled in multiple directions.

2. The irradiance detection device for a rotatable biometric device according to claim 1, characterized in that, The fixed base (1) includes: The rotatable platform (9) is connected to the base body (11) via a bearing (10); The first fixing groove (2) is fixedly installed on the rotatable platform (9).

3. The illuminance detection device for a rotatable biometric device according to claim 2, characterized in that, The rotatable platform (9) is equipped with: The manual rotation mechanism (12) includes anti-slip textures or a rotating handle provided on the edge of the rotatable platform (9); An angle dial (13) works in conjunction with a pointer on the base body (11) to indicate the rotation angle.

4. The illuminance detection device for a rotatable biometric device according to claim 2, characterized in that, Also includes: A stepper motor (14) is fixed inside the base body (11); A reduction gear set (15) connects the output shaft of the stepper motor (14) to the rotatable platform (9); The control panel (16) is equipped with a rotation speed adjustment button (17) and a forward / reverse switch (18).

5. The illuminance detection device for a rotatable biometric device according to claim 1, characterized in that, The universal joint (8) includes: The ball head assembly (19) is fixed to the back of the detection plate (4); The ball socket (20) is connected to the top of the support frame (7); the ball head assembly (19) is rotatably engaged in the ball socket (20).

6. The illuminance detection device for a rotatable biometric device according to claim 5, characterized in that, The ball socket (20) has a locking knob (21) on its side wall for fixing the rotation angle of the ball head assembly (19).

7. The illuminance detection device for a rotatable biometric device according to claim 1, characterized in that, The first fixing groove (2) is provided with an elastic clamping mechanism, including: At least two sets of symmetrically distributed spring clips (22); Adjustment knob (23) is used to control the clamping force of the spring clip (22).

8. The illuminance detection device for a rotatable biometric device according to claim 1, characterized in that, The second fixing slot (5) is a detachable slot structure, and the bottom is provided with an adapter interface that matches the illuminance meter (6).

9. The illuminance detection device for a rotatable biometric device according to claim 1, characterized in that, The support frame (7) is a height-adjustable column, including: The inner tube (24) and outer tube (25) are connected together; Positioning holes (26) and pins (27) on the pipe wall.

10. The illuminance detection device for a rotatable biometric device according to claim 1, characterized in that, It also includes an angle scale, set at: The outer edge of the universal joint (8) is used to display the horizontal deflection angle of the detection plate (4); The edge of the detection plate (4) is used to display the pitch angle of the detection plate (4).

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