Glass polarizing reflectance spectrometer

Abstract

The application provides a glass polarized reflectivity spectrum detection device, comprising a reflectivity test module, a positioning module and a data processing module; the reflectivity test module is used for obtaining the reflectivity of a glass sample; the positioning module comprises a test sample table and a mechanical hand, the test sample table is used for placing the glass sample, the reflectivity test module is arranged on the mechanical hand, the mechanical hand is provided with a Z-axis displacement meter and a posture sensor, the Z-axis displacement meter is used for obtaining displacement data of the mechanical hand in the Z-axis direction, and the posture sensor is used for obtaining light spot offset data; the data processing module controls the mechanical hand to operate according to the displacement data and the light spot offset data, and adjusts the positional relationship between the detection end face of the reflectivity test module and the glass sample; through the feedback and regulation of the perpendicular distance and parallelism between the detection end face and the glass sample, the outgoing light spot can accurately aim at the target point position of the glass sample, and the precision of the glass polarized reflectivity spectrum detection is improved.

Description

Technical Field

[0001] This application relates to the field of reflectance detection, and more particularly to a glass polarized reflectance spectral detection device. Background Technology

[0002] Traditional automotive glass reflectivity testing often employs offline sampling methods, which suffer from low efficiency, lack of real-time feedback, and significant human error. Existing online testing systems are susceptible to interference from ambient light and temperature drift, resulting in poor repeatability. They also rely on manual calibration, cannot be integrated with production line PLCs or robotic arms for coordinated control, and are inefficient. Furthermore, they lack real-time database management during testing, leading to delayed data processing and an inability to quickly display data analysis results for timely adjustments, ultimately resulting in insufficient testing accuracy. Utility Model Content

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] The purpose of this application is to at least partially solve one of the technical problems existing in the related technologies. The embodiments of this application provide a glass polarization reflectance spectral detection device, which can improve the detection accuracy.

[0005] An embodiment of the first aspect of this application provides a glass polarized reflectance spectral detection device, comprising:

[0006] A reflectivity testing module is used to perform optical tests on a glass sample to obtain the reflectivity of the glass sample.

[0007] The positioning module includes a test sample stage and a robotic arm. The test sample stage is used to place a glass sample. The reflectivity test module is set on the robotic arm. The robotic arm is equipped with a Z-axis displacement meter and an attitude sensor. The Z-axis displacement meter is used to acquire displacement data of the robotic arm in the Z-axis direction, and the attitude sensor is used to acquire light spot offset data.

[0008] The data processing module is connected to the reflectivity testing module and the positioning module. The data processing module is used to control the operation of the robot arm according to the displacement data and the spot offset data, so as to adjust the positional relationship between the detection end face of the reflectivity testing module and the glass sample.

[0009] According to an embodiment of the first aspect of this application, the attitude sensor includes a laser emitter and a laser receiver, the laser emitter being mounted on the end effector of the robotic arm, and the laser receiver being mounted at a position corresponding to the glass sample.

[0010] According to an embodiment of the first aspect of this application, the test sample stage is provided with a conveyor belt.

[0011] According to an embodiment of the first aspect of this application, the test sample stage is provided with a slot, and the glass sample is placed on the slot.

[0012] According to an embodiment of the first aspect of this application, the end of the robotic arm is provided with a flexible joint, and the flexible joint is connected to the reflectivity testing module.

[0013] According to an embodiment of the first aspect of this application, the reflectivity testing module is provided with a light source, an integrating sphere, and a spectrometer. The light emitted by the light source illuminates the glass sample, and the reflected light from the glass sample enters the integrating sphere. The uniform light that undergoes diffuse reflection by the integrating sphere enters the spectrometer.

[0014] According to an embodiment of the first aspect of this application, the light source is a halogen tungsten lamp light source.

[0015] According to an embodiment of the first aspect of this application, the reflectivity testing module is further provided with a collimating lens, which is used to focus the light emitted from the light source.

[0016] According to an embodiment of the first aspect of this application, the robotic arm is provided with a suction cup.

[0017] According to an embodiment of the first aspect of this application, the glass polarized reflectance spectral detection device further includes a display for displaying spectral signals and reflectance curves.

[0018] The above scheme has at least the following beneficial effects: by moving the glass sample below the reflectivity testing module on the robotic arm; determining the vertical distance between the detection end face and the glass sample based on the displacement data of the Z-axis displacement meter; determining the parallelism between the detection end face and the glass sample based on the attitude data of the attitude sensor; controlling the operation of the robotic arm based on the displacement data and the spot offset data, adjusting the positional relationship between the detection end face of the reflectivity testing module and the glass sample; when the positioning is completed, the reflectivity of the glass sample is tested through the reflectivity testing module to obtain the reflectivity of the glass sample; through feedback and control of the vertical distance and parallelism between the detection end face and the glass sample, the emitted spot can be accurately aligned with the target point position of the glass sample, thus improving the accuracy of glass polarized reflectivity spectral detection. Attached Figure Description

[0019] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0020] Figure 1This is a structural diagram of a glass polarized reflectance spectral detection device;

[0021] Figure 2 This is a diagram of the internal structure of the reflectivity testing module. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0025] An embodiment of this application provides a glass polarized reflectance spectral detection device.

[0026] Reference Figure 1 The glass polarized reflectance spectral detection device includes: a reflectance testing module 200, a positioning module, and a data processing module.

[0027] The reflectivity testing module 200 is used to perform optical tests on the glass sample and obtain the reflectivity of the glass sample. The positioning module includes a test sample stage 120 and a robot arm 110. The test sample stage 120 is used to place the glass sample, and the reflectivity testing module 200 is set on the robot arm 110. The robot arm 110 is equipped with a Z-axis displacement meter and an attitude sensor. The Z-axis displacement meter is used to obtain the displacement data of the robot arm 110 in the Z-axis direction, and the attitude sensor is used to obtain the light spot offset data. The reflectivity testing module 200 and the positioning module are connected to the data processing module. The data processing module is used to control the operation of the robot arm 110 according to the displacement data and the light spot offset data to adjust the positional relationship between the detection end face of the reflectivity testing module 200 and the glass sample.

[0028] In this embodiment, the glass sample is moved below the reflectivity testing module 200 on the robot arm 110; the vertical distance between the detection end face and the glass sample is determined based on the displacement data of the Z-axis displacement meter; the parallelism between the detection end face and the glass sample is determined based on the attitude data of the attitude sensor; the robot arm 110 is controlled to operate based on the displacement data and the spot offset data, adjusting the positional relationship between the detection end face of the reflectivity testing module 200 and the glass sample. When the positioning is completed, the reflectivity of the glass sample is tested by the reflectivity testing module 200 to obtain the reflectivity of the glass sample. By feedback and control of the vertical distance and parallelism between the detection end face and the glass sample, the emitted spot can be accurately aligned with the target point position of the glass sample, improving the accuracy of glass polarized reflectivity spectral detection.

[0029] The overall operation process of the glass polarized reflectance spectral detection device is described below.

[0030] A conveyor belt 130 is installed below the test sample stage 120. The test sample stage 120 is equipped with a locking position, on which the glass sample is placed and fixed. The test sample stage 120 moves the glass sample to the test position via the conveyor belt 130, so that the glass sample rests below the reflectivity testing module 200 on the robotic arm 110.

[0031] After the glass sample is moved below the reflectivity testing module 200 on the robot arm 110, the robot arm 110 positions the detection end face onto the surface of the glass sample according to a preset program. It can be understood that the detection end face is the surface from which the emitted light spot is collected.

[0032] After the glass sample is in place, initial positioning and coarse alignment are performed by the robotic arm 110. The robotic arm 110 moves the carrying detection end face to a preset initial position above the glass sample, which is based on the coordinates of the test sample stage 120. The non-contact distance sensor (such as a laser rangefinder or proximity sensor) integrated on the robotic arm 110 is activated and begins to rapidly scan and measure the approximate distance between the detection end face and the surface of the glass sample to prevent collisions during rapid movement.

[0033] After coarse alignment, fine alignment is performed using robotic arm 110. The fine alignment process is based on adjustments made to the perpendicular distance between the detection end face and the glass sample, and the parallelism between the detection end face and the glass sample.

[0034] The attitude sensor includes a laser emitter and a laser receiver. The laser emitter is mounted on the end effector of the robot 110, and the laser receiver is mounted at the position corresponding to the glass sample.

[0035] The end of the robotic arm 110 is equipped with a flexible joint, which is connected to the reflectivity testing module 200.

[0036] The robotic arm 110 slowly descends along the Z-axis (perpendicular to the surface of the glass sample), bringing the detection end face closer to the glass sample. During this process, a high-precision Z-axis displacement gauge (accuracy ±0.1mm) integrated inside the robotic arm 110 continuously monitors its Z-axis displacement, determining the perpendicular distance between the detection end face and the glass sample based on the displacement data from the robotic arm 110's Z-axis displacement gauge. A laser emitter emits a laser beam that illuminates a pre-set marker point or specific area on the glass surface. A laser receiver installed nearby captures the real-time positional changes of the laser spot. The laser receiver is a high-resolution laser receiver or a position-sensitive detector.

[0037] The control system of the robotic arm 110 receives displacement data from the Z-axis displacement meter and spot offset data from the laser receiver in real time. The control system compares the displacement data with the target position and the spot offset data with the target point position data. Based on this feedback, the control system generates adjustment commands to precisely adjust the movement speed and final stopping position of the robotic arm 110's Z-axis to achieve the target height (e.g., a specific micrometer-level distance from the glass surface), and fine-tunes the pitch and roll angles of the flexible mechanism of the robotic arm 110's end effector, ensuring that the laser spot is precisely aligned with the target point. This ensures that the parallelism and perpendicular distance between the detection end face and the glass surface meet preset requirements, achieving a positioning accuracy on the order of ±5μm.

[0038] When the detection end face reaches the set height (which may be a very small non-contact gap or light contact) and the parallelism of the attitude laser indicator meets the requirements, the control system confirms successful positioning based on the feedback values ​​from the Z-axis displacement gauge and the laser sensor reaching the set threshold range.

[0039] Reference Figure 2 The reflectivity testing module 200 includes a light source 230, an integrating sphere 220, and a spectrometer 210. Light emitted from the light source 230 illuminates the glass sample, and the reflected light enters the integrating sphere 220. The uniform light, after diffuse reflection by the integrating sphere 220, enters the spectrometer 210. The reflectivity testing module 200 also includes a collimating lens, which is used to focus the light emitted from the light source 230.

[0040] Specifically, the light source 230 is a halogen tungsten lamp. Of course, in other embodiments, other types of light sources 230 may also be used.

[0041] After positioning is completed, the control system of the robotic arm 110 sends a "positioning complete" feedback signal to the system master controller. After receiving the "positioning complete" feedback signal, the system master controller triggers the robotic arm 110 to send a test signal to the reflectivity test module 200. The reflectivity test module 200 receives the test signal and performs a reflectivity test on the glass sample.

[0042] The light source 230 is a highly stable halogen tungsten lamp light source 230. After preheating and stabilization, the energy fluctuation is <±0.1% / hour. The incident angle of the light source 230 is -65°±0.5°. When the light source 230 is emitted, it is focused onto the sample by a collimating lens, and the diameter of the emitted light spot is <10mm. The integrating sphere 220 has a corresponding receiving angle of 65°±0.5. The inner cavity of the integrating sphere 220 is sintered from PTFE material with high diffuse reflectivity. After the reflected light from the sample enters the inner cavity of the integrating sphere 220, it undergoes numerous diffuse reflections to achieve homogenization. After being collected by the integrating sphere 220, the reflected light is input to the detector from the light outlet. The detector is a fiber optic spectrometer 210 with a wavelength range of 200-1100nm, an accuracy of ±0.1nm, and supports 1nm interval sampling. The light emitted from the integrating sphere 220 passes through the slit of the fiber optic spectrometer 210 and is collimated before being input to the grating beam splitter of the fiber optic spectrometer 210. The grating beam splitter decomposes the incident polychromatic light into monochromatic light and outputs it to the CCD detector. The CCD detector converts the received optical signal into an electrical signal and outputs it through a USB interface.

[0043] Before testing the sample, the reference light and background light are calibrated to achieve reflectivity benchmark calibration. The robotic arm 110 positions the detection end face against a standard white board with known high reflectivity, collects the reflected energy from the white board, and obtains the reference light intensity value (approximately a 100% reflectivity benchmark). This reference light intensity value is denoted as I. c Position the detection end face onto an empty test stage where no sample is placed, collect the reflected energy from the empty test stage, and obtain the background light intensity value (including ambient stray light + electronic noise). The background light intensity value is recorded as I0.

[0044] If the intensity of the sample is I when it is placed in the glass, then the reflectance of the glass sample is R = (I / I). c -I0) / I.

[0045] The reflectivity of a glass sample includes parameters such as P-polarized reflectivity (RLp1, RLp2, RLp3).

[0046] Before testing the sample, optical positioning calibration is performed, and the position of the detection end face is optimized by combining the light spot feedback to ensure that the center deviation of the light spot is <±1mm.

[0047] By implementing a high-precision assurance mechanism, system errors, environmental interference, and time drift are eliminated, ensuring detection accuracy at ±5μm positioning.

[0048] The execution cycle is automatic every 30 minutes (dual calibration is performed in coordination), and the data is stored in the local database in real time, supporting traceability.

[0049] After obtaining the reflectivity of the glass sample, an anomaly detection and fault tolerance mechanism is implemented. When the reflectivity result of the glass sample deviates from the expected value by more than ±0.15%, the detection process is automatically retried for the same sample, and the abnormal data points, retest records, and timestamps are saved to the log to avoid misjudgments caused by instantaneous environmental interference (strong light / vibration) or system fluctuations.

[0050] After the test is completed, data is recorded, including data such as reflectivity value and positioning status.

[0051] For qualified samples, the conveyor belt 130 continues to move the qualified samples forward.

[0052] For non-conforming samples (NG samples), the robot 110 uses the suction cup on the end effector to pick up the non-conforming sample, remove it and place it in a special NG sample storage area.

[0053] The glass polarization reflectance spectral detection device also includes a display screen, which shows the spectral signal and reflectance curve. It dynamically displays the spectral signal and reflectance curve through intelligent monitoring and identifies abnormal data thresholds. Reflectance data is transmitted to the MES system in real time via PLC communication protocol, enabling closed-loop production control, encrypted storage, and access control to prevent unauthorized data tampering.

[0054] This glass polarized reflectance spectral detection device and method boasts advantages such as high precision, high efficiency, strong compatibility, and low cost. It achieves reflectance repeatability of ±0.1%, long-term drift of ±0.1% / hour, single-point measurement time ≤1 second, supports 100% online full inspection, is adaptable to various automotive glass thicknesses (≤9mm), and can be extended to the detection of other optical materials. Automatic calibration and fault warning reduce maintenance frequency and manual intervention.

[0055] The above is a detailed description of the preferred embodiments of this application, but this application is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A glass polarized reflectance spectral detection device, characterized in that, include: A reflectivity testing module is used to perform optical tests on a glass sample to obtain the reflectivity of the glass sample. The positioning module includes a test sample stage and a robotic arm. The test sample stage is used to place a glass sample. The reflectivity test module is set on the robotic arm. The robotic arm is equipped with a Z-axis displacement meter and an attitude sensor. The Z-axis displacement meter is used to acquire displacement data of the robotic arm in the Z-axis direction, and the attitude sensor is used to acquire light spot offset data. The data processing module is connected to the reflectivity testing module and the positioning module. The data processing module is used to control the operation of the robot arm according to the displacement data and the spot offset data, so as to adjust the positional relationship between the detection end face of the reflectivity testing module and the glass sample.

2. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The attitude sensor includes a laser emitter and a laser receiver. The laser emitter is mounted on the end effector of the manipulator, and the laser receiver is mounted at the position corresponding to the glass sample.

3. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The test sample stage is equipped with a conveyor belt.

4. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The test sample stage is equipped with a locking slot, on which the glass sample is placed.

5. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The end of the robotic arm is equipped with a flexible joint, which is connected to the reflectivity testing module.

6. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The reflectivity testing module is equipped with a light source, an integrating sphere, and a spectrometer. The light emitted by the light source illuminates the glass sample, and the reflected light from the glass sample enters the integrating sphere. The uniform light that undergoes diffuse reflection by the integrating sphere enters the spectrometer.

7. The glass polarized reflectance spectral detection device according to claim 6, characterized in that, The light source is a halogen tungsten lamp.

8. The glass polarized reflectance spectral detection device according to claim 6, characterized in that, The reflectivity testing module is also equipped with a collimating lens, which is used to focus the light emitted from the light source.

9. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, The robotic arm is equipped with a suction cup.

10. The glass polarized reflectance spectral detection device according to claim 1, characterized in that, It also includes a display for displaying spectral signals and reflectance curves.

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