Transparent part stress detection device

Abstract

The utility model provides a transparent part stress detection device, comprising a first polarization component used for receiving polarized light penetrating through a detected part; the second polarization component is used for carrying out preliminary polarization processing on the unpolarized light to form polarized light, a measured piece is placed on the second polarization component, and the second polarization component and the first polarization component are arranged at an interval; an LED light source plate; the detection assembly is arranged on one side, far away from the second polarization part, of the LED light source plate, unpolarized light is emitted through the LED light source plate and passes through the second polarization part to generate polarized light, the polarized light passes through a detected piece, the phase change of the polarized light is caused by internal stress of the detected piece, and the polarized light passes through the first polarization part and then is output through the second polarization part. And a polarization environment is formed between the two polarization diaphragms, so that the detected piece is detected, and the problem that the colored stripes of the transparent mirror cannot be detected by manual vision is solved.

Description

Technical Field

[0001] This utility model relates to the field of parts inspection technology, specifically to a transparent parts stress detection device. Background Technology

[0002] Transparent mirrors are used in the display areas of products such as air conditioner remote controls and panel receiver windows. Currently, key appearance defects of transparent mirrors are all inspected manually by visual inspection. Manual inspection has poor consistency, and long-term repetitive work can easily lead to visual fatigue and quality accidents. In addition, manual visual inspection cannot detect the problem of colored stripes on transparent mirrors.

[0003] Therefore, existing technologies need further development. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a stress detection device for transparent parts, so as to solve the technical problem that colored stripes on transparent mirrors cannot be detected by human visual inspection in related technologies.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: It provides a stress detection device for transparent parts, comprising:

[0006] A first polarization component is used to receive polarized light transmitted through the test object;

[0007] The second polarization component is used to perform preliminary polarization processing on unpolarized light to form polarized light. The test object is placed on the second polarization component. The second polarization component is located on one side of the first polarization component and is arranged at intervals from the first polarization component.

[0008] LED light source board, wherein the LED light source board is disposed on the side of the second polarizing component away from the first polarizing component;

[0009] A detection component is disposed on the side of the LED light source plate away from the second polarizing component, so that the colored stripes on the test piece block the detection component, thereby collecting the frequency of the colored stripe blockage through the detection component.

[0010] Furthermore, the first polarization component includes:

[0011] First transparent glass;

[0012] A first polarizing film is fixed to the first transparent glass.

[0013] Furthermore, the second polarization component includes:

[0014] Second transparent glass;

[0015] A second polarizing diaphragm is disposed at an interval from the first polarizing diaphragm. The second polarizing diaphragm is fixed to the second transparent glass. The test piece is placed between the second polarizing diaphragm and the first polarizing diaphragm.

[0016] Furthermore, the transparent part stress detection device also includes a rotating part, which is rotatably disposed, and the second polarizing film is connected to the rotating part.

[0017] Furthermore, the rotating part includes:

[0018] Connector, the connector being fixed to the second transparent glass;

[0019] A stepper motor, the output shaft of which is snapped into the connector.

[0020] Furthermore, the detection component also includes:

[0021] A photoelectric switch, wherein the photoelectric switch is located on the side of the second polarization component away from the first polarization component;

[0022] The controller is located on one side of the photoelectric switch, is electrically connected to the photoelectric switch, is electrically connected to the stepper motor, and is electrically connected to the LED light source board. The controller is powered by an external power source.

[0023] Furthermore, the connector includes:

[0024] A connecting shaft, which is fixed to the output shaft of the stepper motor;

[0025] A sleeve, which engages with the connecting shaft and is fixed to the second transparent glass. And / or, the connecting element is a coupling.

[0026] Furthermore, the transparent part stress detection device also includes an alarm component, which includes:

[0027] A pass indicator light, which is electrically connected to the controller;

[0028] A defective indicator light, which is electrically connected to the controller;

[0029] A buzzer, which is electrically connected to the controller, and is connected in parallel with the defect indicator light;

[0030] The base is snapped into the LED light source board, detachably connected to the stepper motor, fixed to the controller, and detachably connected to the photoelectric switch.

[0031] Beneficial effects:

[0032] 1. Unpolarized light emitted by the LED light source board is converted into polarized light by the second polarization component. The polarized light passes through the test piece, and the internal stress of the test piece causes a phase change in the polarized light. After the polarized light passes through the first polarization component, a polarization environment is formed between the first polarization component and the second polarization component, thereby detecting the test piece and solving the problem that the colored stripes of a transparent mirror cannot be detected by manual visual inspection.

[0033] 2. The rotating part further drives the second polarizing film to rotate, and by changing the relative angle between the second polarizing film and the first polarizing film, the characteristics of polarized light are adjusted, thereby making the interference fringes more obvious.

[0034] 3. The controller is electrically connected to the photoelectric switch. The controller stores the standard operating frequency of the test piece (DPT) when it is working normally. The controller compares the real-time operating frequency of the DPT collected by the photoelectric switch with the corresponding standard operating frequency when the DPT is working normally. If the real-time operating frequency of the DPT is within the range of the corresponding standard operating frequency stored in the controller, the DPT is considered to be of qualified quality. If the real-time operating frequency of the DPT exceeds the range of the corresponding standard operating frequency stored in the controller, the DPT is considered to be of unqualified quality. Attached Figure Description

[0035] Figure 1 This is an exploded view of the overall structure of a transparent part stress detection device used in an embodiment of this utility model;

[0036] Figure 2 This is a schematic diagram of the structure of the first polarization component and the second polarization component of a transparent part stress detection device used in an embodiment of this utility model;

[0037] Figure 3 This is a schematic diagram of the specific structure of the detection component of a transparent part stress detection device used in an embodiment of this utility model;

[0038] Figure 4 This is a schematic diagram of the LED light source board and base of a transparent part stress detection device used in an embodiment of this utility model;

[0039] Figure 5 This is a schematic diagram of the specific structure of the rotating part and the second polarization component of a transparent part stress detection device used in an embodiment of this utility model;

[0040] Figure 6This is a schematic diagram of the connecting shaft of a transparent part stress detection device used in an embodiment of this utility model;

[0041] Figure 7 This is a top view schematic diagram of the sleeve of a transparent part stress detection device used in an embodiment of this utility model;

[0042] Figure 8 This is a pulse design diagram of a transparent part stress detection device used in an embodiment of this utility model;

[0043] Figure 9 This is a flowchart of the equipment testing process for a transparent part stress testing device provided in this embodiment of the utility model;

[0044] Figure 10 This is a bottom view of the sleeve of a transparent part stress detection device used in an embodiment of this utility model.

[0045] The above figures include the following reference numerals:

[0046] 111. First polarizing component; 1111. First transparent glass; 1112. First polarizing film;

[0047] 112. Second polarizing component; 1121. Second transparent glass; 1122. Second polarizing film;

[0048] 113. LED light source board;

[0049] 114. Rotating part; 1141. Connecting part; 1142. Connecting shaft; 1143. Sleeve; 1144. Stepper motor;

[0050] 2. Detection components;

[0051] 211. Photoelectric switch; 212. Controller;

[0052] 3. Alarm components;

[0053] 4. Base;

[0054] 5. The part being tested. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0056] According to an embodiment of this utility model, a stress detection device for transparent parts is provided. Please refer to [link / reference]. Figures 1 to 10 The device includes: a first polarizing component 111, which receives polarized light transmitted through the test piece 5; a second polarizing component 112, which performs preliminary polarization processing on the unpolarized light to form polarized light, wherein the test piece 5 is placed on the second polarizing component 112, which is the transparent part to be tested, and the second polarizing component 112 is located on one side of the first polarizing component 111, and the second polarizing component 112 is disposed at a distance from the first polarizing component 111; an LED light source plate 113, which is disposed on the side of the second polarizing component 112 away from the first polarizing component 111; and a detection component 2, which is disposed on the side of the LED light source plate 113 away from the second polarizing component 112, so that the colored stripes on the test piece 5 block the detection component 2, thereby collecting the frequency of the colored stripe blockage through the detection component 2.

[0057] Because the transparent lens of the air conditioner is made of PC material, which is an isotropic amorphous material, but during the injection molding process, the external pressure was not removed before cooling and molding, resulting in residual stress and making it an anisotropic material, with the optical axis coinciding with the stress direction. When light propagates in anisotropic media, birefringence occurs. When the test piece 5 is placed between the first polarizing component 111 and the second polarizing component 112, colored stripes appear. The greater the plastic deformation (stress), the stronger the anisotropy, and the denser the colored stripes.

[0058] This application mainly utilizes the blocking judgment principle of photoelectric switch 211 to detect the stress consistency of the tested part, and is applicable to the quality testing of transparent parts of various specifications.

[0059] By employing the above-described device, the LED light source board emits unpolarized light, which is then polarized by the second polarization component 112. The polarized light passes through the test piece 5, and the internal stress of the test piece 5 causes a phase change in the polarized light. After passing through the first polarization component 111, a polarization environment is formed between the first polarization component 111 and the second polarization component 112. Thus, the test piece 5 is detected by the detection component 2, solving the technical problem in related technologies where the colored stripes of a transparent mirror cannot be detected by human visual inspection.

[0060] Please refer to Figure 1 The first polarizing component 111 includes: a first transparent glass 1111; a first polarizing film 1112, wherein the first polarizing film 1112 is fixed to the first transparent glass 1111.

[0061] By using the above-described device, the first polarizing film 1112 is fixed by the first transparent glass 1111.

[0062] Please refer to Figure 1 and Figure 2 The second polarizing component 112 includes: a second transparent glass 1121; a second polarizing film 1122, the second polarizing film 1122 being disposed at a distance from the first polarizing film 1112, the second polarizing film 1122 being fixed to the second transparent glass 1121, and a test piece 5 being placed between the second polarizing film 1122 and the first polarizing film 1112.

[0063] By using the above-mentioned device, the second polarizing film 1122 is fixed by the second transparent glass 1121, and the test piece 5 is placed between the second polarizing film 1122 and the first polarizing film 1112, which facilitates the subsequent testing of the test piece 5.

[0064] Please refer to Figure 1 and Figure 3 The transparent part stress detection device further includes a rotating part 114, which is rotatably disposed, and the second polarizing film 1122 is connected to the rotating part 114.

[0065] By employing the above-mentioned device, the rotating part 114 further drives the second polarizing film 1122 to rotate. By changing the relative angle between the second polarizing film 1122 and the first polarizing film 1112, the characteristics of polarized light are adjusted, thereby making the interference fringes more obvious.

[0066] Please refer to Figure 5 The rotating part 114 includes: a connector 1141, which is fixed to the second transparent glass 1121; and a stepper motor 1144, which is used to rotate and change the angle of the second transparent glass 1121 plate and the second polarizing film 1122, and the output shaft of the stepper motor 1144 is engaged with the connector 1141.

[0067] By employing the aforementioned device, the stepper motor 1144 drives the second transparent glass 1121 to rotate, thereby driving the second polarizing film 1122 to rotate, changing the relative angle with the first polarizing film 1112, adjusting the characteristics of polarized light, and thus making the interference fringes more obvious.

[0068] Please refer to Figure 1The detection component 2 further includes: a photoelectric switch 211, which is located on the side of the second polarization component 112 away from the first polarization component 111; and a controller 212, which is located on the side of the photoelectric switch 211, electrically connected to the photoelectric switch 211, electrically connected to the stepper motor 1144, and electrically connected to the LED light source board 113. The controller 212 is powered by an external power source.

[0069] By employing the aforementioned device, the controller 212 is electrically connected to the photoelectric switch 211. The controller 212 internally stores the standard operating frequency of the test component 5 when it is working normally. The controller 212 compares the real-time operating frequency of the test component 5 collected by the photoelectric switch 211 with the standard operating frequency corresponding to the normal operation of the transparent part. If the real-time operating frequency of the test component 5 is within the range of variation of the corresponding standard operating frequency stored internally, the test component 5 is judged to be of qualified quality. If the real-time operating frequency of the test component 5 exceeds the range of variation of the corresponding standard operating frequency stored internally, the test component 5 is judged to be of unqualified quality.

[0070] It should be noted that the real-time stress response frequency of the test piece 5 collected by the photoelectric switch 211 is actually the number of times the test piece 5 is blocked by colored stripes per unit time. The photoelectric switch 211 is positioned so that it can be blocked by the display area of ​​the test piece 5. After the detection device is turned on, the second transparent glass plate 1121 and the second polarizing film 1122 will rotate under the drive of the stepper motor 1144. Each time the second transparent glass plate 1121 and the second polarizing film 1122 swing, the photoelectric switch 211 sends a sensing signal to the controller 212, thus realizing the automatic detection of the real-time stress response frequency of the test piece 5.

[0071] Please refer to Figure 5 , Figure 6 and Figure 10 The connector 1141 includes: a connecting shaft 1142, which is fixed to the output shaft of the stepper motor 1144; and a sleeve 1143, which is engaged with the connecting shaft 1142 and fixed to the second transparent glass 1121. Alternatively, the connector 1141 may be a coupling.

[0072] By using the above-mentioned device, the second polarization component 112 is driven to rotate through the cooperation of the connecting shaft 1142 and the sleeve 1143. The function of the coupling is the same as that of the connecting piece 1141.

[0073] The transparent part stress detection device further includes an alarm component 3, which includes: a qualified indicator light electrically connected to the controller 212; a failed indicator light electrically connected to the controller 212; a buzzer electrically connected to the controller 212 and connected in parallel with the failed indicator light; and a base 4 snapped onto the LED light source board 113, detachably connected to the stepper motor 1144, fixed to the controller 212, and detachably connected to the photoelectric switch 211.

[0074] By using the above-mentioned device, the controller 212 determines whether the tested component 5 is qualified. If it is qualified, the indicator light will illuminate; otherwise, it is unqualified. If it is unqualified, the indicator light will illuminate and the buzzer will sound.

[0075] A method for stress testing of transparent parts, used in the aforementioned stress testing device for transparent parts, includes: placing the test piece 5 between a first polarizing component 111 and a second polarizing component 112; energizing an LED light source board 113 to emit unpolarized light, which passes through the second polarizing component 112, the test piece 5, and the first polarizing component 111 to create a polarized environment, causing colored stripes to appear on the test piece 5; a detection component 2 is disposed in the display area of ​​the test piece 5, and the polarized light received by the detection component 2 can be blocked by the colored stripes of the test piece 5; the detection component 2 collects the frequency of the colored stripe blocking on the test piece 5; and the frequency of the blocking determines whether the test piece 5 is qualified. The angle of the transparent second polarizing component 112 is adjusted by the stepper motor 1144. When the second polarizing component 112 rotates, the photoelectric switch 211 is blocked by the colored stripes of the test piece 5, generating a sensing signal and sending it to the controller 212. The controller 212 records the real-time operating frequency of the test piece 5, which is the number of times the colored stripes are blocked per unit time. The controller 212 generates a pulse pattern according to the rotation law of the second polarizing component 112 and compares it with a standard pulse pattern. If the time difference between each stage of the pulse pattern and the standard pulse pattern does not exceed X, the test piece 5 is judged to be qualified. A standard frequency is set, and the frequency of the blocking is compared with the standard frequency. The difference between the blocking frequency and the standard frequency is used. If the error between the real-time operating frequency and the standard operating frequency is less than or equal to X, the test piece 5 is judged to be qualified, and the qualified indicator light is lit. If the error between the real-time operating frequency and the standard operating frequency exceeds X, the test piece 5 is judged to be unqualified, and the unqualified indicator light is lit and a buzzer sounds.

[0076] Control logic principle: The controller 212 receives the real-time operating frequency of the stress of the test piece 5 collected by the photoelectric switch 211 and compares it with the corresponding standard operating frequency stored in its internal memory. If the frequency error is less than X, it is judged to be qualified. The error between the real-time operating frequency and the standard operating frequency is preferably less than or equal to 5%.

[0077] Please refer to Figure 8 ,in Figure 8 Inner a: Angle between 60 and 90 degrees, b: Angle between 120 and 180 degrees, c: Angle between 58 and 60 degrees. A indicates that the appearance of the upper part of the tested part 5 is unqualified, and B indicates that the appearance of the lower part of the tested part 5 is unqualified.

[0078] The specific logic settings of controller 212 are as follows:

[0079] When the photoelectric switch 211 is blocked by the colored stripes, it generates an induction signal, and the controller 212 generates a high-level pulse. When the photoelectric switch 211 is not blocked by the colored stripes, it does not generate an induction signal, and the controller 212 remains at a low level. Taking the rotation pattern of the second transparent glass 1121 and the second polarizing film 1122 as an example: the angle range of the second transparent glass 1121 and the second polarizing film 1122 is 60-90° (assuming 0° in the power-off reset state). The position of the photoelectric switch 211 remains unchanged. When it rotates to 120-180° (this angle can be flexibly set according to actual conditions), the photoelectric switch 211 is blocked, generating a sensing signal. The controller 212 generates a high-level pulse. If the time for the second transparent glass 1121 and the second polarizing film 1122 to complete one up-and-down motion is 12s, the time to maintain the rotation angle in the 120-180° range is 4s, and the time to maintain the rotation angle in the 58-60° range is 3s, the pulse pattern generated in the controller circuit for the two motion cycles of the second transparent glass 1121 and the second polarizing film 1122 is as follows. Figure 8 As shown. When the time difference between each stage of the pulse pattern in the controller 212 circuit and the pulse pattern stored internally does not exceed 5%, the controller 212 determines that the tested component 5 is qualified, and the qualified indicator light illuminates; otherwise, it is unqualified, the unqualified indicator light illuminates, and the buzzer sounds.

[0080] The equipment testing process of this application is as follows: First, turn on the equipment, then put in the test piece 5, turn on the LED light source board 113, and test it through the testing component 2. If it is qualified, it is manually packaged; if it is not qualified, the alarm component 3 alarms, and it is manually sorted and removed from the line.

[0081] To further improve detection accuracy, the system continuously optimizes the detection model using machine learning algorithms (such as least squares method) based on real-time acquired data and the standard frequency model stored in the controller 212. As the production environment changes, such as temperature and humidity, the stress mode of the test piece 5 may undergo slight changes. Traditional methods may not be able to adapt to these changes, but the self-learning function can adjust the standard model in real time to ensure detection accuracy.

[0082] Specifically, the system acquires the stress signal of the test piece 5 in real time via a photoelectric switch. Changes in this signal reflect the dynamic changes in surface stress of the test piece 5, and these stress changes lead to the appearance of colored stripes. Assume the signal acquired by the photoelectric switch can be represented as S(t), where t is time, and S(t) represents the number of times the colored stripes of the test piece 5 are obscured per unit time. The rotation and stress pattern of the test piece 5 cause S(t) to exhibit periodic changes over time, which can be represented by frequency, as shown in the formula:

[0083]

[0084] in, This is the time required for the tested component 5 to complete one rotation cycle. The system will then record the actual frequency. With standard frequency Compare the two and judge the quality of the parts based on the error between them.

[0085] During the detection process, the system continuously collects data and compares it with a pre-stored standard frequency model. When the actual frequency... With standard frequency When the difference Δf between the two is less than the set tolerance range ϵ, the tested part is judged to be of acceptable quality; otherwise, it is judged to be unacceptable. The error calculation formula is:

[0086]

[0087] To address the subtle differences between batches and production conditions, traditional static standard testing methods are inadequate. This solution introduces a self-learning function, enabling the system to dynamically adjust the testing model based on real-time acquired data. This process is achieved through machine learning algorithms, specifically by optimizing the model using the least squares method to minimize errors and progressively update the standard frequency model. Assume... The standard frequency predicted by the system through the model is the objective function optimized by the least squares method as follows:

[0088]

[0089] Here, θ represents the model parameters, and N represents the number of data points collected. By minimizing this objective function, the system can adjust the model parameters to make the predicted standard frequency closer to the actual detection data, thereby achieving self-learning and automatic adjustment.

[0090] Furthermore, environmental changes can also affect the stress mode of the test piece 5, especially under conditions of significant temperature and humidity variations. Therefore, the system incorporates an environmental monitoring module capable of sensing the real-time impact of temperature changes on the detection signal. (Assuming temperature...) The change in temperature affects the stress mode of the test piece 5. The system can describe the effect of temperature change on frequency using the following formula:

[0091]

[0092] in, It is the temperature change coefficient. This is a reference temperature. The system monitors temperature changes in real time and adjusts the parameters in the model accordingly. The parameters are set to ensure that the detection results remain accurate even when the external environment changes.

[0093] To better illustrate the application scenarios of this system, let's explain its working principle through a case study. Suppose that during the production of an air conditioner remote control, the stress mode of the transparent panel may change due to different batches of materials, causing a slight shift in the frequency of the colored stripes. Traditional detection methods may be unable to adapt to this variation, leading to misjudgments. However, by introducing a self-learning function, the system can automatically adjust the detection model based on historical data and real-time acquired data. If a batch of transparent panels exhibits a frequency shift under specific temperature conditions, the system can incorporate this change into the standard frequency model through a self-learning algorithm, thereby avoiding misjudgments and ensuring the accuracy of the final detection results.

[0094] The system's self-learning function is not limited to frequency adjustment; it can also continuously optimize the model based on historical data and feedback from the production process. When the system detects a significant deviation between the quality of a batch of test parts 5 and the standard model, the machine learning algorithm automatically adjusts the parameters and corrects the detection model through real-time feedback. Each learning process updates the standard frequency model, making future detections more accurate. This self-learning capability enables the detection system to cope with minor differences caused by different batches and environmental conditions during the production process, thereby ensuring efficient quality control.

[0095] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0096] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0097] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0098] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0099] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A stress detection device for transparent parts, characterized in that, include: The first polarization component (111) is used to receive polarized light transmitted through the test piece (5); The second polarization component (112) is used to perform preliminary polarization processing on unpolarized light to form polarized light; the test piece (5) is placed on the second polarization component (112), the second polarization component (112) is located on one side of the first polarization component (111), and the second polarization component (112) and the first polarization component (111) are arranged at intervals; LED light source board (113), the LED light source board (113) is disposed on the side of the second polarization component (112) away from the first polarization component (111); The detection component (2) is disposed on the side of the LED light source plate (113) away from the second polarization component (112) so that the color stripe on the test piece (5) blocks the detection component (2), thereby collecting the frequency of the color stripe blocking through the detection component (2).

2. The stress detection device for transparent parts according to claim 1, characterized in that, The first polarization component (111) includes: First transparent glass (1111); A first polarizing film (1112) is fixed to the first transparent glass (1111).

3. The stress detection device for transparent parts according to claim 2, characterized in that, The second polarizing component (112) includes: Second transparent glass (1121); The second polarizing film (1122) is disposed at an interval from the first polarizing film (1112). The second polarizing film (1122) is fixed to the second transparent glass (1121). The test piece (5) is placed between the second polarizing film (1122) and the first polarizing film (1112).

4. The stress detection device for transparent parts according to claim 3, characterized in that, The transparent part stress detection device further includes a rotating part (114), which is rotatably disposed, and the second polarizing film (1122) is connected to the rotating part (114).

5. The stress detection device for transparent parts according to claim 4, characterized in that, The rotating part (114) includes: A connector (1141) is fixed to the second transparent glass (1121); A stepper motor (1144) is provided, the output shaft of which is engaged with the connector (1141).

6. The stress detection device for transparent parts according to claim 5, characterized in that, The detection component (2) includes: A photoelectric switch (211) is located on the side of the second polarizing component (112) away from the first polarizing component (111); The controller (212) is located on one side of the photoelectric switch (211). The controller (212) is electrically connected to the photoelectric switch (211), the controller (212) is electrically connected to the stepper motor (1144), the controller (212) is electrically connected to the LED light source board (113), and the controller (212) is powered by an external power source.

7. The stress detection device for transparent parts according to claim 5, characterized in that, The connector (1141) includes: A connecting shaft (1142) is fixed to the output shaft of the stepper motor (1144); A sleeve (1143) is engaged with the connecting shaft (1142), and the sleeve (1143) is fixed to the second transparent glass (1121); and / or, The connecting element (1141) is a coupling.

8. The stress detection device for transparent parts according to claim 6, characterized in that, The transparent part stress detection device further includes an alarm component (3), which includes: A qualified indicator light, which is electrically connected to the controller (212); A defective indicator light, which is electrically connected to the controller (212); A buzzer, which is electrically connected to the controller (212), and the buzzer is connected in parallel with the defect indicator light; The base (4) is snapped into the LED light source board (113), the base (4) is detachably connected to the stepper motor (1144), the base (4) is fixed to the controller (212), and the base (4) is detachably connected to the photoelectric switch (211).

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