Shutter control structure for a solar simulator

Abstract

The utility model relates to the technical field of sunlight simulator, concretely is a shutter control structure of sunlight simulator, including shutter baffle, reduction motor, limit switch, mica gasket and light path passageway, shutter baffle adopts metal material, one end is arc-shaped to adapt round light path passageway, be used for realizing the opening and closing of light path passageway, the other end size is smaller, and the rotating shaft of reduction motor is connected through screw fastening, and the small end is equipped with arc-shaped thickening accessory, in the utility model, the limit switch is set in the position close to shutter baffle swing circle center, combines low speed, pinion gap's reduction motor, significantly reduces shutter baffle and limit switch swing lever's contact speed and impact degree, simultaneously utilizes long swing lever limit switch and thickening contact accessory, realizes gradual contact extrusion trigger, effectively solved the overshoot and rebound problem, reduced the risk of reduction motor gear damage.

Description

Technical Field

[0001] This utility model relates to the field of sunlight simulator technology, and in particular to a shutter control structure for a sunlight simulator. Background Technology

[0002] A sunlight simulator is a device that simulates sunlight output. Its core light source uses an internationally recognized short-arc xenon lamp, whose emission spectrum closely matches the solar spectrum. The output light intensity can reach 5-10 times the intensity of natural sunlight. After processing by filters in the optical path, it can output specific wavelengths of light, and is widely used in medical, cosmetic testing, and scientific research fields. As an optical product, optical path design and control are key aspects of product design and also the most technically challenging. The shutter control scheme for controlling the on / off state of the optical path is particularly critical. It requires not only reliable shutter switch operation but also good heat insulation and heat resistance of structural components to ensure stable operation and safe use. Existing shutter control schemes for sunlight simulators have the following significant drawbacks: unstable shutter switch operation, prone to overshoot and rebound at the limit points, and repeated start-stop cycles can damage the gears of the reduction motor, affecting shutter lifespan; inadequate heat insulation for the motor and limit switches, with high temperatures generated by continuous light exposure during long-term use leading to component aging, thus affecting shutter reliability and shortening the overall product lifespan. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems mentioned in the background art.

[0004] This utility model adopts the following technical solution: a shutter control structure for a sunlight simulator, including a shutter baffle, a geared motor, a limit switch, a mica gasket, and an optical path channel. The shutter baffle is made of metal, with one end being arc-shaped to fit the circular optical path channel, used to open and close the optical path channel; the other end is smaller in size and is fastened to the shaft of the geared motor by screws, and the smaller end is provided with an arc-shaped thickened accessory to increase the contact area with the limit switch lever. The geared motor is installed on the back of the light source, and its power output shaft is connected to the shutter baffle to provide power for the rotation of the shutter baffle. Two limit switches are provided, symmetrically arranged on both sides of the small end of the shutter baffle, and are used to detect the open and closed positions of the shutter baffle. The switch signal output by the limit switches is connected to the control board of the sunlight simulator. The limit switches are of the high temperature resistant long swing rod type and are installed close to the swing center of the shutter baffle. The mica gaskets are respectively disposed between the contact surface of the geared motor and the side plate of the lamp box, and between the contact surface of the limit switch and the side plate of the lamp box, to isolate the heat generated by the light source.

[0005] Preferably, the geared motor is selected with a speed of less than 20 rpm, uses DC 5-12V power supply, and is a model with small gear backlash.

[0006] Preferably, the limit switch is selected from limit switches with a lever length greater than 10mm and a temperature resistance greater than 80℃.

[0007] Preferably, the arc-shaped thickened accessory at the small end of the shutter baffle is fastened to the shutter baffle by screws, and the curvature of the thickened accessory is consistent with the curvature of the rotation trajectory of the small end of the shutter baffle.

[0008] Preferably, the diameter of the arc-shaped end of the shutter baffle is adapted to the diameter of the circular optical path channel of the sunlight simulator, and the edge of the arc-shaped end is provided with a rounded corner transition structure.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting the limit switch near the center of the shutter baffle swing circle, combined with a low-speed, small-gear-backlash reduction motor, the contact speed and impact force between the shutter baffle and the limit switch swing arm are significantly reduced. At the same time, by using a long swing arm limit switch and thickened contact parts, a progressive contact compression trigger is achieved, which effectively solves the problems of overshoot and rebound, and reduces the risk of damage to the gears of the reduction motor.

[0010] 2. In this utility model, the geared motor and limit switch are both installed on the back of the light source, and a mica gasket is set on the contact surface between them and the side panel of the light box to form double heat insulation protection, which effectively blocks the high temperature conduction generated by the continuous illumination of the light source, avoids the aging of components due to high temperature, and significantly improves the service life and working reliability of the shutter control structure.

[0011] 3. In this utility model, the components are conventionally selected and the connection method is simple. No complicated processing technology is required, which facilitates mass production, assembly and maintenance, and has good practicality and economy. Attached Figure Description

[0012] Figure 1 A schematic diagram of a shutter control structure for a sunlight simulator is provided for this utility model; Figure 2 This invention presents a schematic diagram of a shutter control structure for a sunlight simulator.

[0013] Legend: 1. Shutter baffle; 2. Gear motor; 3. Limit switch; 4. Mica gasket; 5. Optical path channel. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Example Please see Figure 1-2 This utility model provides a technical solution: a shutter control structure for a sunlight simulator, including a shutter baffle 1, a reduction motor 2, a limit switch 3, a mica gasket 4, and an optical path channel 5. The shutter baffle 1 is made of metal, with one end in an arc shape to fit the circular optical path channel 5, used to open and close the optical path channel 5; the other end is smaller and is fastened to the shaft of the reduction motor 2 with screws, and this smaller end has an arc-shaped thickened accessory to increase the contact area with the lever of the limit switch 3. The diameter of the arc-shaped end of the shutter baffle 1 matches the diameter of the circular optical path channel 5 of the sunlight simulator, and the edge of the arc-shaped end is... It features a rounded transition structure, with the small end securely connected to the shaft of the geared motor 2 via screws. The shaft connection has a keyway positioning structure to prevent slippage during rotation, ensuring 100% power transmission from the motor to the baffle and avoiding shutter start / stop delays due to power loss. The thickened arc-shaped accessory at the small end is made of PA66+glass fiber wear-resistant material, and its curvature is completely consistent with the rotation trajectory of the small end of the baffle. This not only increases the contact area with the swing arm of the limit switch 3, dispersing contact pressure and preventing deformation of the swing arm due to excessive local force, but also buffers the impact when the baffle contacts the swing arm through the slight elasticity of the plastic material, reducing mechanical wear and extending the service life of the limit switch. The optical path channel 5 is a circular tubular structure with a polished inner wall to reduce light reflection loss within the channel and ensure stable light intensity output from the sunlight simulator. The channel diameter matches the arc-shaped end diameter of the shutter baffle 1, providing space for the baffle's rotation and ensuring that the baffle fits snugly against the inner wall of the channel when closed, forming a sealed optical path and preventing stray light interference. The outer wall of the optical path channel 5 is fixedly connected to the side plate of the light box, providing a rotation reference for the shutter baffle 1. The baffle's rotation trajectory is centered on the motor shaft, and the channel position matches the trajectory of the baffle's arc end, ensuring the consistency of the baffle's path for each rotation and preventing collisions between the baffle and the channel due to channel position deviation. At the same time, the channel's position design guides the light to be output vertically, precisely aligning with the placement of the test sample and ensuring the accuracy of the test data.

[0017] The geared motor 2 is installed on the back of the light source, and its power output shaft is connected to the shutter baffle 1 to provide power for the rotation of the shutter baffle 1. Two limit switches 3 are provided, symmetrically arranged on both sides of the small end of the shutter baffle 1, used to detect the open and closed positions of the shutter baffle 1. Their output switch signals are connected to the sunlight simulator control board. The limit switches 3 are high-temperature resistant long swing arm type, installed close to the swing center of the shutter baffle 1. Two limit switches are set and symmetrically arranged on both sides of the small end of the baffle, corresponding to the "shutter opening limit position" and "shutter closing limit position" respectively. The switches are high-temperature resistant long swing arm type, with a swing arm length of 15-25mm, which can cover the rotation stroke of the small end of the baffle, ensuring that the switch is triggered when the baffle rotates to its limit position. The on / off signal output by the switch is directly fed back to the sunlight simulator control board to control... After receiving the signal, the shutter board immediately cuts off the motor power supply to achieve precise shutter start and stop, avoiding overshoot of the shutter baffle. Overshoot may cause the shutter baffle to hit the inner wall of the optical path channel, causing structural damage. The installation position is close to the swing center of the shutter baffle 1. According to the principle of "linear velocity = angular velocity × radius", when the motor speed is fixed, the closer the contact point is to the center, the smaller the linear velocity. The low linear velocity when the small end of the shutter baffle contacts the swing arm can greatly reduce the contact impact and avoid the swing arm from being deformed by the impact, which may cause the signal to be falsely triggered. At the same time, it reduces the reverse torque when the motor starts and stops. Overshoot will cause the motor gear to bear the reverse impact force, preventing gear wear or breakage, and solving the problem of "damage to motor gears by multiple starts and stops" in the existing technology. Mica gaskets 4 are respectively disposed between the contact surfaces of the geared motor 2 and the lamp box side panel, and between the limit switch 3 and the lamp box side panel, to isolate the heat generated by the light source. Mica material has excellent heat insulation performance. When disposed between the contact surfaces of the geared motor 2 and the lamp box side panel, and between the limit switch 3 and the lamp box side panel, it can block the high temperature inside the lamp box from being conducted to the motor and switch. By blocking the high temperature conduction, problems such as aging of the insulation layer of the internal coil of the motor, oxidation of the limit switch contacts, and deformation of the plastic shell can be avoided. The size of the mica gasket is perfectly matched with the mounting surfaces of the motor and switch, and can cover the entire contact surface to ensure that there are no local heat conduction leaks. In addition, mica material has good electrical insulation performance, which can prevent leakage between the metal lamp box side panel and the motor and switch, and improve the safety of equipment use. The geared motor 2 operates at 10 rpm, powered by 12V DC, and is a low-speed model with minimal gear backlash. The low-speed DC geared motor, with its precisely controlled rated speed of 10 rpm, significantly reduces the rotational linear velocity of the shutter baffle 1, preventing inertial impact during start-up and stop due to excessive speed. Simultaneously, the motor gear backlash is controlled within 0.02-0.05mm, minimizing backlash error and ensuring consistent baffle rotation angles. This prevents light path on / off position deviations caused by gear backlash, such as light leakage due to baffle misalignment after multiple start-ups and stopes. The 12V DC power supply is compatible with the conventional control circuit voltage of the sunlight simulator, eliminating the need for an additional power module and simplifying system design. The motor output torque is ≥0.8N. m can easily drive the shutter baffle 1 to overcome the airflow resistance in the optical path channel 5, ensuring that the baffle rotates smoothly without any jamming. Limit switch 3 is a limit switch with a lever length greater than 10mm and a temperature resistance greater than 80℃; The arc-shaped thickened accessory at the small end of the shutter baffle 1 is fastened to the shutter baffle 1 by screws, and the curvature of the thickened accessory is consistent with the curvature of the rotation trajectory of the small end of the shutter baffle 1.

[0018] Working principle: The shutter control structure of this utility model's sunlight simulator operates as follows: Shutter opening: The user issues a light-emitting command through the human-machine interface of the sunlight simulator. The control board sends a start signal to the geared motor 2, which is powered on and drives the shutter baffle 1 to rotate. The arc-shaped end gradually separates from the light path channel 5, and the light path begins to conduct. When the thickened part at the small end of the shutter baffle 1 contacts the limit switch 3 lever at the corresponding opening position, the progressive squeezing lever triggers the limit switch 3 to output a switch signal. This signal is fed back to the control board. After the system recognizes the signal, it immediately controls the geared motor 2 to stop, and the shutter baffle 1 stops rotating, completing the shutter opening action. Shutter closing: After the user issues a light-off command, the control board controls the geared motor 2 to reverse, driving the shutter baffle 1 to rotate in the opposite direction. The arc-shaped end gradually blocks the light path channel 5. When the thickened part at the small end of the shutter baffle 1 contacts the limit switch 3 lever at the corresponding closing position, it triggers the limit switch 3 to output a switch signal. After receiving the signal, the control board stops the geared motor 2, and the shutter baffle 1 stops rotating, completing the shutter closing action. Throughout the entire operation, the mica gasket 4 continuously blocks the heat conducted by the side plate 6 of the light box, protecting the geared motor 2 and the limit switch 3 from high temperature. The close-to-center arrangement and long swing arm design of the limit switch 3 ensure that the shutter baffle 1 moves smoothly without obvious overshoot or rebound, effectively protecting the gears of the geared motor 2 and extending the service life of the equipment.

[0019] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A shutter control structure for a sunlight simulator, comprising a shutter baffle (1), a geared motor (2), a limit switch (3), a mica gasket (4), and an optical path channel (5), characterized in that: The shutter baffle (1) is made of metal. One end is arc-shaped to fit the circular light path channel (5) and is used to open and close the light path channel (5). The other end is smaller and is fastened to the shaft of the geared motor (2) by screws. The smaller end is provided with an arc-shaped thickened accessory to increase the contact area with the swing arm of the limit switch (3). The geared motor (2) is installed on the back of the light source, and its power output shaft is connected to the shutter baffle (1) to provide power for the rotation of the shutter baffle (1); Two limit switches (3) are provided and symmetrically arranged on both sides of the small end of the shutter baffle (1) to detect the opening and closing positions of the shutter baffle (1). The switch signal output by the limit switch (3) is connected to the control board of the sunlight simulator. The limit switch (3) is a high temperature resistant long swing rod type and is installed close to the swing center of the shutter baffle (1). The mica gaskets (4) are respectively disposed between the contact surface of the geared motor (2) and the side panel of the lamp box, and between the limit switch (3) and the side panel of the lamp box, to isolate the heat generated by the light source.

2. The shutter control structure of the sunlight simulator according to claim 1, characterized in that: The speed of the geared motor (2) is less than 20 revolutions per minute, it is powered by DC, and it is a model with small gear clearance.

3. The shutter control structure of the sunlight simulator according to claim 1, characterized in that: The limit switch (3) is selected with a swing arm length greater than 10mm and a temperature resistance greater than 80℃.

4. The shutter control structure of the sunlight simulator according to claim 1, characterized in that: The arc-shaped thickened accessory at the small end of the shutter baffle (1) is fastened to the shutter baffle (1) by screws, and the arc of the thickened accessory is consistent with the arc of the rotation trajectory of the small end of the shutter baffle (1).

5. The shutter control structure of the sunlight simulator according to claim 1, characterized in that: The diameter of the arc-shaped end of the shutter baffle (1) is adapted to the diameter of the circular optical path channel (5) of the sunlight simulator, and the edge of the arc-shaped end is provided with a rounded corner transition structure.

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