Two-way laser centering device for illuminometer calibration

Abstract

The utility model discloses a kind of two-way laser centering devices for illuminometer calibration, belong to illuminometer calibration technical field. Including base, the top surface of base is equipped with first fixed frame, the top surface of base is slidably equipped with second fixed frame, the side of first fixed frame close to second fixed frame is embedded with calibration light source, the side of second fixed frame close to first fixed frame is equipped with opening, the top surface of second fixed frame has cavity, cavity and opening are communicated, cavity is used to place illuminometer, opening exposes the detection unit of illuminometer outside, the axis of calibration light source and opening is on same horizontal plane, first fixed frame and second fixed frame are equipped with light shield on the side close to each other, laser transmitter and laser receiver are all installed in light shield, the inside and top surface of base have driving part, driving part drives second fixed frame to move along the direction parallel to first fixed frame.

Description

Technical Field

[0001] This utility model relates to the field of illuminance meter calibration technology, specifically to a bidirectional laser alignment device for illuminance meter calibration. Background Technology

[0002] An illuminance meter is a commonly used instrument for measuring light intensity, widely applied in lighting engineering, environmental monitoring, and laboratories. Its measurement accuracy requires regular calibration. During illuminance meter calibration, the core requirement is to ensure that the optical axis of the calibration light source is strictly aligned with the center of the illuminance meter's photosensitive surface. Any misalignment will lead to deviations in the luminous flux received by the photosensitive surface, directly affecting the accuracy of the calibration results.

[0003] In current calibration procedures, the alignment process largely relies on manual visual adjustment: the illuminance meter is placed on an optical platform, and the relative positions of the calibration light source and the illuminance meter's photosensitive surface are observed with the naked eye, with the distance and angle between them manually adjusted. This method has significant drawbacks: firstly, manual judgment has low accuracy, especially when the distance between the light source and the illuminance meter is large, even a slight deviation can lead to a large calibration error; secondly, the adjustment process is time-consuming, requiring repeated verification, resulting in low efficiency and making it difficult to meet the needs of batch calibration. Although some automated calibration equipment uses unidirectional laser positioning, it can only achieve unidirectional alignment of the light source and the laser, and cannot simultaneously ensure the coaxiality of the laser and the illuminance meter's photosensitive surface, still leaving a risk of alignment deviation. Utility Model Content

[0004] The purpose of this invention is to provide a bidirectional laser alignment device for illuminometer calibration, so as to solve the problems mentioned in the background art.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A bidirectional laser alignment device for luminometer calibration includes a base, a first mounting bracket mounted on the top surface of the base, and a second mounting bracket slidably mounted on the top surface of the base. A calibration light source is embedded on the side of the first mounting bracket near the second mounting bracket. An opening is formed on the side of the second mounting bracket near the first mounting bracket. The top surface of the second mounting bracket has a cavity communicating with the opening. The cavity is used to house the luminometer, and the opening exposes the detection unit of the luminometer. The axes of the calibration light source and the opening are on the same horizontal plane. Light shields are mounted on the sides of the first and second mounting brackets that are close to each other. A laser emitter and a laser receiver are installed inside each light shield. A driving component is located inside and on the top surface of the base. The driving component drives the second mounting bracket along the path of the first mounting bracket. The first fixed frame moves in a parallel direction, with the first fixed frame fixedly engaged with the base to ensure the stability of the calibration light source position. The second fixed frame slides with the base. Combined with the driving action of the drive component, the second fixed frame can be moved smoothly in a direction parallel to the first fixed frame, thereby adjusting the relative position of the illuminance meter on the second fixed frame and the calibration light source on the first fixed frame. At the same time, the light shields on the first and second fixed frames, in conjunction with the internal laser emitter and laser receiver, can determine the alignment status through bidirectional laser signal feedback. Based on this feedback, the drive component fine-tunes the position of the second fixed frame, ultimately achieving precise alignment between the calibration light source and the illuminance meter detection unit. This ensures that there is no deviation in the light flux reception during the calibration process, improving the accuracy of the calibration results. The movement process can also assist in adjusting the distance between the two, meeting the needs of different calibration scenarios.

[0007] Furthermore, the top surface of the base is provided with a sliding groove, in which a slider slides. The driving component includes a first threaded rod rotatably installed inside the sliding groove. The slider and the first threaded rod are threadedly engaged. The driving component also includes a power component, which drives the first threaded rod to rotate. The slider and the bottom surface of the second fixed frame are connected. The sliding groove on the base provides a sliding track for the slider. The slider is connected to the bottom surface of the second fixed frame. The first threaded rod and the slider are threadedly engaged. With the driving action of the power component, the rotational motion of the power component can be converted into the linear motion of the slider, thereby driving the second fixed frame to move smoothly and accurately. This avoids deviation or shaking during the movement of the second fixed frame, ensuring the accuracy of the centering adjustment. At the same time, the threaded connection has self-locking properties, which can keep the second fixed frame stably in the adjusted position and prevent the calibration results from being affected by position changes during the calibration process.

[0008] Furthermore, the power component includes a motor and a reducer mounted on the top surface of the base. The output end of the motor and the input end of the reducer are connected in a transmission manner, and the output end of the reducer is connected in a transmission manner to the first threaded rod. The motor and the reducer are in transmission cooperation, and the reducer is then connected in a transmission manner to the first threaded rod. The motor provides stable power output, and the reducer can reduce the output speed of the motor and increase the torque, avoiding excessive movement speed of the second fixed frame due to excessive motor speed. This enables the slow and precise movement of the second fixed frame, improving the controllability and accuracy of the centering adjustment. At the same time, the automatic drive mode of the motor replaces manual adjustment, saving manpower and improving calibration efficiency.

[0009] Furthermore, both ends of the slide groove are provided with grooves, and a roller is rotatably connected to the grooves via a coil spring. A dustproof strip is wound around the outside of the roller, and the free end of the dustproof strip is connected to the slider. The grooves at both ends of the slide groove provide installation space for the roller. The roller is rotatably connected to the groove via a coil spring. The dustproof strip is wound on the roller and its free end is connected to the slider. When the slider moves in the slide groove, the dustproof strip can unfold or retract with the movement of the slider, always covering the opening of the slide groove, preventing dust and impurities from entering the interior of the slide groove, preventing dust from affecting the fitting accuracy between the slider and the first threaded rod, ensuring the smooth sliding of the slider and the service life of the driving components, and thus maintaining the overall alignment accuracy and stability of the device.

[0010] Furthermore, the dustproof belt and the slide groove are of the same width, which allows the dustproof belt to completely cover the opening width of the slide groove, avoiding dustproof dead corners and ensuring that dust cannot enter the interior of the slide groove from the gap between the dustproof belt and the slide groove, further improving the dustproof effect, ensuring the fitting accuracy between the slider and the first threaded rod, and maintaining the accuracy of the device's centering adjustment.

[0011] Furthermore, a rubber plate slides inside the cavity, and a threaded sleeve is rotatably connected inside the second fixing frame. A second threaded rod is threadedly engaged with the inner thread of the threaded sleeve. The free end of the second threaded rod is connected to the rubber plate. A knob is provided on the outer side of the second fixing frame. The knob and the threaded sleeve are coaxially connected. The rubber plate inside the cavity is connected to the second threaded rod, and the second threaded rod is threadedly engaged with the threaded sleeve. The knob and the threaded sleeve are coaxially connected. Rotating the knob can drive the threaded sleeve to rotate, thereby driving the second threaded rod to push the rubber plate to slide inside the cavity. The rubber plate cooperates with the inner wall of the cavity, which can clamp and fix illuminance meters of different sizes inside the cavity, preventing the illuminance meters from shifting during calibration, ensuring the relative position of the illuminance meter detection unit and the opening is fixed, and thus ensuring the alignment accuracy with the calibration light source. At the same time, the rubber plate is elastic, which can avoid damage to the illuminance meters during clamping.

[0012] Furthermore, a controller is embedded in the top surface of the base. The controller on the top surface of the base is electrically connected to components such as the motor, laser emitter, and laser receiver, enabling centralized control of the operation of each component.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the bidirectional laser alignment device for illuminance meter calibration, with the first fixed frame, the second fixed frame, the driving component and the bidirectional laser positioning component working together, achieves bidirectional and precise alignment of the calibration light source and the photosensitive surface of the illuminance meter, avoids deviation caused by single-direction positioning, improves alignment accuracy, and thus solves the problems of low accuracy of manual judgment and large calibration errors caused by small offsets. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the bidirectional laser alignment device for illuminance meter calibration disclosed in an embodiment of the present invention;

[0015] Figure 2 This is a top view of the bidirectional laser alignment device for luminometer calibration disclosed in this embodiment of the utility model.

[0016] Figure 3 This is a first cross-sectional structural schematic diagram of the bidirectional laser alignment device for illuminometer calibration disclosed in this embodiment of the present invention;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of structure A in the middle;

[0018] Figure 5 This is a second cross-sectional structural schematic diagram of the bidirectional laser alignment device for illuminometer calibration disclosed in an embodiment of this utility model.

[0019] In the diagram: 1. Base; 2. First mounting bracket; 3. Calibration light source; 4. Light shield; 5. Second mounting bracket; 6. Cavity; 7. Knob; 8. Controller; 9. Dustproof belt; 10. Reducer; 11. Motor; 12. First threaded rod; 13. Slider; 14. Slide groove; 15. Laser emitter; 16. Laser receiver; 17. Groove; 18. Reel; 19. Opening; 20. Rubber plate; 21. Threaded sleeve; 22. Second threaded rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a bidirectional laser alignment device for illuminance meter calibration, comprising a base 1, a first fixing frame 2 mounted on the top surface of the base 1, a second fixing frame 5 slidably mounted on the top surface of the base 1, a calibration light source 3 embedded on the side of the first fixing frame 2 near the second fixing frame 5, an opening 19 on the side of the second fixing frame 5 near the first fixing frame 2, a cavity 6 on the top surface of the second fixing frame 5 communicating with the opening 19, the cavity 6 for placing the illuminance meter, and the opening 19 exposing the detection unit of the illuminance meter. The axes of the calibration light source 3 and the opening 19 are on the same horizontal plane. A light shield 4 is mounted on the side of the first fixing frame 2 and the second fixing frame 5 that are close to each other. A laser emitter 15 and a laser receiver 16 are mounted inside the light shield 4. The base 1 has a driving component inside and on its top surface, which drives the second fixing frame 5 to move in a direction parallel to the first fixing frame 2. First, place the illuminance meter inside the cavity 6 of the second mounting bracket 5, exposing the illuminance meter's detection unit through the opening 19. Then, turn on the laser emitters 15 inside the light shields 4 on the first and second mounting brackets 2 and 5. The laser emitters 15 on both sides emit lasers towards the laser receivers 16 on the other side. If the laser receivers 16 do not accurately receive the laser, it indicates that the calibration light source 3 and the illuminance meter detection unit are not aligned. At this time, start the drive mechanism, which moves the second mounting bracket 5 in a direction parallel to the first mounting bracket 2. During the movement, continuously judge the alignment status through the signals fed back by the laser emitters 15 and the laser receivers 16 until both sides of the laser can be accurately received. At this time, the calibration light source 3 and the illuminance meter detection unit are completely aligned. If the calibration scenario requires adjusting the distance between the two, the second mounting bracket 5 can be moved to the target distance using the drive mechanism after alignment. Finally, turn on the calibration light source 3 for calibration.

[0022] Specifically, a black light shield can be placed over the top of base 1.

[0023] As an embodiment of this utility model, the top surface of the base 1 is further provided with a sliding groove 14, and a slider 13 slides in the sliding groove 14. The driving component includes a first threaded rod 12 rotatably installed inside the sliding groove 14. The slider 13 and the first threaded rod 12 are threadedly engaged. The driving component also includes a power component, which drives the first threaded rod 12 to rotate. The slider 13 is connected to the bottom surface of the second fixed frame 5. The power component is started first, and the power component outputs power to drive the first threaded rod 12 inside the sliding groove 14 to rotate. Since the slider 13 is threadedly engaged with the first threaded rod 12, and the slider 13 is limited to the sliding groove 14 and cannot rotate, the rotation of the first threaded rod 12 will drive the slider 13 to move linearly along the sliding groove 14. Since the slider 13 is connected to the bottom surface of the second fixed frame 5, the linear movement of the slider 13 will drive the second fixed frame 5 to move synchronously. By controlling the forward and reverse rotation of the power component, the second fixed frame 5 can be moved closer to or away from the first fixed frame 2, thereby adjusting the centering position between the calibration light source 3 and the illuminance meter.

[0024] As an embodiment of this utility model, the power component further includes a motor 11 and a reducer 10 mounted on the top surface of the base 1. The output end of the motor 11 and the input end of the reducer 10 are connected in a transmission manner, and the output end of the reducer 10 is connected in a transmission manner to the first threaded rod 12. The motor 11 is started by the controller 8, and the motor 11 operates and outputs power. Its output end transmits the power to the input end of the reducer 10. The reducer 10 reduces the speed of the motor 11 and increases the output torque. Then, the output end of the reducer 10 transmits the processed power to the first threaded rod 12, causing the first threaded rod 12 to rotate slowly and stably. Then, through thread engagement, the slider 13 and the second fixed frame 5 move precisely. The controller 8 controls the start, stop and forward / reverse rotation of the motor 11 to achieve precise control of the movement of the second fixed frame 5.

[0025] As an embodiment of this utility model, further, grooves 17 are provided at both ends of the slide groove 14. A roller 18 is rotatably connected to the groove 17 through a coil spring. A dustproof strip 9 is wound around the outside of the roller 18. The free end of the dustproof strip 9 is connected to the slider 13. When the slider 13 moves to one side along the slide groove 14, the slider 13 will pull the corresponding dustproof strip 9 on one side, causing the roller 18 on that side to rotate against the elastic force of the coil spring. The dustproof strip 9 unfolds from the roller 18 and moves with the slider 13. At the same time, the roller 18 on the other side rotates in the opposite direction under the elastic force of the coil spring, and retracts the dustproof strip 9 on that side and winds it back onto the roller 18. No matter where the slider 13 moves to in the slide groove 14, the dustproof strips 9 on both sides always cover the opening of the slide groove 14 together, preventing dust from entering. When the slider 13 moves in the opposite direction, the above process is repeated, and the dustproof strip 9 always maintains dustproof protection for the slide groove 14.

[0026] As one embodiment of this utility model, the dustproof belt 9 and the chute 14 are of equal width.

[0027] As an embodiment of this utility model, a rubber plate 20 slides inside the cavity 6, and a threaded sleeve 21 is rotatably connected inside the second fixing frame 5. A second threaded rod 22 is threadedly connected to the threaded sleeve 21. The free end of the second threaded rod 22 is connected to the rubber plate 20. A knob 7 is provided on the outside of the second fixing frame 5. The knob 7 and the threaded sleeve 21 are coaxially connected. First, the illuminance meter is placed in the cavity 6 of the second fixing frame 5 so that the detection unit of the illuminance meter is aligned with the opening 19. Then, the knob 7 on the outside of the second fixing frame 5 is rotated. The knob 7 drives the threaded sleeve 21, which is coaxially connected, to rotate inside the second fixing frame 5. Since the second threaded rod 22 is threadedly connected to the threaded sleeve 21, and the rubber plate 20 is limited to the cavity 6 and cannot rotate, the rotation of the threaded sleeve 21 will be converted into the linear motion of the second threaded rod 22. The second threaded rod 22 pushes the rubber plate 20 to slide towards the illuminance meter until the rubber plate 20 is tightly attached to the illuminance meter, and the illuminance meter is firmly fixed in the cavity 6, thus completing the installation and fixing of the illuminance meter.

[0028] As an embodiment of this utility model, the top surface of the base 1 is further provided with a controller 8.

[0029] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a control cabinet. The control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A bidirectional laser alignment device for luminometer calibration, characterized in that, The device includes a base (1), on which a first fixing frame (2) is mounted, and a second fixing frame (5) slides on the top surface of the base (1). A calibration light source (3) is embedded on the side of the first fixing frame (2) near the second fixing frame (5). An opening (19) is provided on the side of the second fixing frame (5) near the first fixing frame (2). The top surface of the second fixing frame (5) has a cavity (6), which communicates with the opening (19). The cavity (6) is used to place a lux meter. The opening (19) exposes the detection unit of the illuminance meter to the outside. The axes of the calibration light source (3) and the opening (19) are on the same horizontal plane. The first fixture (2) and the second fixture (5) are each equipped with a light shield (4) on their side close to each other. The light shield (4) is equipped with a laser emitter (15) and a laser receiver (16). The base (1) has a drive unit inside and on its top surface. The drive unit drives the second fixture (5) to move in a direction parallel to the first fixture (2).

2. The bidirectional laser alignment device for illuminometer calibration according to claim 1, characterized in that, The top surface of the base (1) is provided with a sliding groove (14), and a slider (13) slides in the sliding groove (14). The driving component includes a first threaded rod (12) rotatably installed inside the sliding groove (14). The slider (13) and the first threaded rod (12) are threadedly engaged. The driving component also includes a power component, which drives the first threaded rod (12) to rotate. The slider (13) is connected to the bottom surface of the second fixing frame (5).

3. The bidirectional laser alignment device for illuminometer calibration according to claim 2, characterized in that, The power components include a motor (11) and a reducer (10) mounted on the top surface of the base (1). The output end of the motor (11) and the input end of the reducer (10) are connected in a transmission connection. The output end of the reducer (10) and the first threaded rod (12) are connected in a transmission connection.

4. The bidirectional laser alignment device for illuminometer calibration according to claim 2, characterized in that, Both ends of the slide (14) are provided with grooves (17), and a roller (18) is rotatably connected in the groove (17) by a coil spring. A dustproof strip (9) is wrapped around the outside of the roller (18), and the free end of the dustproof strip (9) is connected to the slider (13).

5. The bidirectional laser alignment device for illuminometer calibration according to claim 4, characterized in that, The dustproof belt (9) and the chute (14) are of equal width.

6. The bidirectional laser alignment device for illuminometer calibration according to claim 1, characterized in that, A rubber plate (20) slides inside the cavity (6), and a threaded sleeve (21) is rotatably connected inside the second fixing frame (5). A second threaded rod (22) is threadedly connected inside the threaded sleeve (21). The free end of the second threaded rod (22) is connected to the rubber plate (20). A knob (7) is provided on the outside of the second fixing frame (5). The knob (7) and the threaded sleeve (21) are coaxially connected.

7. The bidirectional laser alignment device for illuminometer calibration according to claim 1, characterized in that, The controller (8) is embedded in the top surface of the base (1).

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