Application of triboluminescent coating in line speed detection

Abstract

The application belongs to the technical field of friction, and particularly relates to application of a friction luminescent coating in online speed detection. The application provides application of a friction luminescent coating in online speed detection, wherein the friction luminescent coating comprises resin and mixed fluorescent powder; the mixed fluorescent powder comprises ZnS:Mn 2+ fluorescent powder and ZnS:Cu fluorescent powder. The application combines ZnS:Mn 2+ fluorescent powder and ZnS:Cu fluorescent powder with different speed response characteristics, and applies them to speed detection, so that real-time and visualization of speed detection can be realized, the detection method is simplified, and production cost and learning cost of speed detection are saved.

Description

Technical Field

[0001] This invention belongs to the field of friction technology, specifically relating to the application of a triboluminescent coating in online speed detection. Background Technology

[0002] In industrial production, linear velocity detection is a crucial engineering technology. Real-time monitoring of changes in linear velocity is of great significance to various aspects of industrial production. In industrial automation and production optimization, linear velocity detection allows for more precise control and coordination of the production process, improving efficiency. In equipment maintenance and fault diagnosis, linear velocity detection helps detect abnormal operation, wear, and malfunctions, thereby reducing downtime and improving equipment reliability. In energy management, linear velocity detection facilitates optimized energy utilization. For example, in electric motor drive systems, linear velocity detection can help adjust the motor load to reduce energy consumption. In terms of safety, linear velocity detection ensures that production equipment operates within safe speed ranges, reducing the risk of accidents. In summary, linear velocity detection plays a vital role in modern industrial production and manufacturing.

[0003] Currently, commonly used methods for linear velocity detection include: Encoder detection: Encoders are widely used devices for measuring rotary or linear motion. In linear motion, linear encoders are typically mounted on conveyor belts, rollers, or tracks, calculating linear velocity by measuring displacement or pulses; Laser rangefinders: Laser rangefinders use laser beams to measure the distance to an object and then calculate the velocity over time. This method is suitable for applications requiring non-contact measurement; Ultrasonic sensing: Ultrasonic sensors emit ultrasonic pulses and measure their return time, thus measuring the distance and velocity of an object; Camera and image processing: Cameras can be used to capture images of workpieces or objects, and image processing techniques are used to track their motion to estimate velocity. This is widely used in visual quality control and machine vision applications; Rotary tachometers: Rotary tachometers are typically used to measure the speed of rotating parts, but they can also be used to measure linear velocity, especially on rollers or drums. Rotary encoders calculate linear velocity by measuring the rotational speed of a rotating shaft; Radar detection: In some high-precision and long-range applications, radar technology can be used to measure the velocity of objects. Radar achieves this by transmitting radio waves and measuring their reflection time; GPS: If an engineered device is moving outdoors, GPS can be used to measure its velocity. GPS receivers can provide high-precision position and velocity information; infrared sensors: Infrared sensors can be used for non-contact measurement of the velocity of engineered components. They achieve this by measuring the reflection or scattering of infrared light. The selection of a suitable linear velocity detection method for engineered components depends on the specific application, the nature of the engineered component, and the required measurement accuracy. These methods can help detect and control the velocity of engineered components to ensure smooth industrial production and equipment operation.

[0004] Despite the variety of linear velocity detection methods, several problems and challenges remain. Real-time requirements: Some applications require real-time detection and response, such as in automated manufacturing. Ensuring timely data transmission and processing is challenging, especially in large-scale systems where real-time detection data is crucial. Data processing and analysis: Processing and analyzing large volumes of linear velocity data is extremely complex and has high learning costs. Energy consumption: In some applications, sensor energy consumption can be a problem, particularly in wireless sensor networks. Energy failures can paralyze the entire velocity detection system, severely impacting industrial production. Cost: Some high-precision linear velocity detection systems can be relatively expensive, which may be a problem for small businesses or applications with limited resources. Therefore, there is an urgent need for a low-cost, simple, and visualizeable linear velocity detection method. Summary of the Invention

[0005] The purpose of this invention is to provide an application of triboluminescent coating in online velocity detection. This invention applies triboluminescent coating to linear velocity detection, enabling real-time visual linear velocity detection, and is low in cost and simple in method.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides an application of a triboluminescent coating in online speed detection, wherein the triboluminescent coating comprises a resin and a mixed phosphor.

[0008] The mixed phosphor includes ZnS:Mn 2+ Phosphors and ZnS:Cu phosphors.

[0009] Preferably, the particle size of the mixed phosphor is 50-400 mesh.

[0010] Preferably, the mixed phosphor contains ZnS:Mn 2+ The mass ratio of phosphor to ZnS:Cu phosphor is 85–97.5:2.5–15.

[0011] Preferably, the thickness of the triboluminescent coating is 500 μm.

[0012] Preferably, it includes the following steps:

[0013] A mixture of phosphor, resin and curing agent is applied to the surface of the device to be tested and then cured sequentially to obtain a triboluminescent coating.

[0014] The triboluminescent coating was subjected to rotational friction testing, and the color of the emission spectrum was observed at different linear velocities.

[0015] When the emission spectrum shows orange-dominant orange-green mixed light, the linear velocity is less than 6 cm / s;

[0016] When the emission spectrum shows an orange-green mixture with equal proportions of orange and green light, the linear velocity is equal to 6 cm / s;

[0017] When the emission spectrum is a mixture of orange and green light with green light dominating, the linear velocity is greater than 6 cm / s.

[0018] Preferably, the resin is epoxy resin;

[0019] The mass ratio of the mixed phosphor to the resin is 1:1 to 5.

[0020] Preferably, the mass ratio of the epoxy resin to the curing agent is 10:3.

[0021] Preferably, the curing temperature is 70°C and the time is 20-30 minutes.

[0022] Preferably, the rotational friction detection process is as follows:

[0023] Turn on the rotary friction tester, and once the rotational speed of the rotary friction tester reaches the set value, apply a load instantly to the triboluminescent coating and collect the second emission spectrum after contact.

[0024] This invention provides an application of a triboluminescent coating in online velocity detection, wherein the triboluminescent coating comprises a resin and a mixed phosphor; the mixed phosphor comprises ZnS:Mn 2+ Phosphor and ZnS:Cu phosphor. This invention combines ZnS:Mn with different linear velocity response characteristics. 2+ A combination of phosphor and ZnS:Cu phosphor is applied to linear velocity detection. At low linear velocities, it displays a predominantly orange-green mixed light, while at high linear velocities, it displays a predominantly green-green mixed light. Linear velocity is detected in real-time by measuring the ratio of orange to green light; the emission color is used to visually monitor whether the linear velocity reaches the set value; and the linear velocity monitoring threshold is controlled by adjusting the ratio of the two powders. This achieves real-time and visual linear velocity detection, simplifies the detection method, and reduces production and learning costs associated with linear velocity detection. Attached Figure Description

[0025] Figure 1 These are photographs of the triboluminescent coatings obtained in Examples 1-6;

[0026] Figure 2 SEM images and elemental distribution diagrams of slices of the triboluminescent coating obtained in Example 5;

[0027] Figure 3The graph shows the variation of the triboluminescence spectrum of the triboluminescent coating obtained in Example 5 with linear velocity.

[0028] Figure 4 The image shows the fitting curves of the intensity of the two peaks of the triboluminescence spectrum of the triboluminescent coating obtained in Example 5 as a function of linear velocity.

[0029] Figure 5 The fitting curves of the triboluminescence intensity of the triboluminescent coatings obtained in Comparative Examples 1 and 2 as a function of linear velocity are shown.

[0030] Figure 6 The images show the triboluminescence spectra of the triboluminescent coatings obtained in Examples 1-6 at a fixed linear velocity.

[0031] Figure 7 The graph shows the effect of different loads on the triboluminescence spectrum of the triboluminescent coating obtained in Example 5 at a fixed linear velocity.

[0032] Figure 8 The graph shows the effect of different temperatures on the triboluminescence spectrum of the triboluminescent coating obtained in Example 5 at a fixed linear velocity. Detailed Implementation

[0033] This invention provides an application of a triboluminescent coating in online speed detection, wherein the triboluminescent coating comprises a resin and a mixed phosphor.

[0034] The mixed phosphor includes ZnS:Mn 2+ Phosphors and ZnS:Cu phosphors.

[0035] In this invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.

[0036] In this invention, the particle size of the mixed phosphor is 50-400 mesh, more preferably 100-300 mesh, and even more preferably 200 mesh.

[0037] In this invention, the mixed phosphor contains ZnS:Mn 2+ The preferred mass ratio of phosphor to ZnS:Cu phosphor is 85–97.5:2.5–15.

[0038] In this invention, the mixed phosphor is preferably obtained by preparation, and the preparation method preferably includes: mixing ZnS:Mn 2+ The phosphor and ZnS:Cu phosphor are mixed and then ground. In this invention, the grinding time is preferably 10 to 30 minutes.

[0039] In this invention, the thickness of the triboluminescent coating is preferably 500 μm.

[0040] In this invention, the application preferably includes the following steps:

[0041] A mixture of phosphor, resin and curing agent is applied to the surface of the device to be tested and then cured sequentially to obtain a triboluminescent coating.

[0042] The triboluminescent coating was subjected to rotational friction testing, and the color of the emission spectrum was observed at different linear velocities.

[0043] When the emission spectrum shows orange-dominant orange-green mixed light, the linear velocity is less than 6 cm / s;

[0044] When the emission spectrum shows an orange-green mixture with equal proportions of orange and green light, the linear velocity is equal to 6 cm / s;

[0045] When the emission spectrum is a mixture of orange and green light with green light dominating, the linear velocity is greater than 6 cm / s.

[0046] This invention involves mixing phosphor, resin, and curing agent, then sequentially spraying and curing the mixture onto the surface of the device to be tested to obtain a triboluminescent coating.

[0047] In this invention, the resin is preferably an epoxy resin.

[0048] This invention does not impose any particular limitation on the type of curing agent; any agent well-known to those skilled in the art can be used. In a specific embodiment of this invention, the curing agent is preferably polyetheramine D230.

[0049] In this invention, the mass ratio of the mixed phosphor and resin is preferably 1:1 to 5, more preferably 1:2 to 4, and even more preferably 1:3. In this invention, the mass ratio of the resin and curing agent is preferably 3:1.

[0050] In this invention, the mixing process is preferably as follows: after the resin and curing agent are first stirred and mixed, the mixed phosphor is added and stirred and mixed a second time, followed by vacuuming to remove air bubbles. In this invention, the first stirring and mixing time is preferably 5-10 minutes; the second stirring and mixing time is preferably 5-10 minutes. In this invention, the vacuuming and air bubble removal time is preferably 5-10 minutes.

[0051] The present invention does not impose any particular limitation on the spraying process; any process well known to those skilled in the art can be used. In the present invention, the curing temperature is preferably 70°C, and the curing time is preferably 20–30 minutes.

[0052] After obtaining the triboluminescent coating, a rotational friction test is performed on the coating, and the color of the emission spectrum is observed at different linear velocities. When the emission spectrum shows orange light as the dominant orange-green mixture, the linear velocity is less than 6 Ωcm / s; when the emission spectrum shows orange light as the equal proportion of orange and green light, the linear velocity is equal to 6 Ωcm / s; when the emission spectrum shows green light as the dominant orange-green mixture, the linear velocity is greater than 6 Ωcm / s.

[0053] In this invention, the preferred process for the rotary friction detection is as follows: The rotary friction testing machine is turned on, and after the rotational speed of the machine reaches a set value, a load is instantaneously applied to the triboluminescent coating, and a second emission spectrum is collected after contact. This invention does not impose any specific limitations on the process of collecting the emission spectrum; any method well-known to those skilled in the art can be used. The rotary friction detection process defined in this invention can eliminate the influence of triboelectricity and triboelectric heat generated during the friction process; simultaneously, collecting the second emission spectrum after contact can eliminate the influence of instantaneous break-in instability, thereby improving the accuracy of the detection.

[0054] To further illustrate the present invention, the application of a triboluminescent coating in online speed detection provided by the present invention will be described in detail below with reference to the accompanying drawings and embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0055] Example 1

[0056] 0.05g ZnS:Cu phosphor and 1.95g ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0057] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0058] Example 2

[0059] 0.1g ZnS:Cu phosphor and 1.9g ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0060] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0061] Example 3

[0062] 0.15g ZnS:Cu phosphor and 1.85g ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0063] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0064] Example 4

[0065] 0.2g ZnS:Cu phosphor and 1.8g ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0066] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0067] Example 5

[0068] 0.25g ZnS:Cu phosphor and 1.75g ​​ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0069] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0070] Example 6

[0071] 0.3g ZnS:Cu phosphor and 1.7g ZnS:Mn 2+ The fluorescent powders were mixed and ground thoroughly in a mortar for 20 minutes to obtain a mixed fluorescent powder with a particle size of 200 mesh.

[0072] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add mixed phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0073] Comparative Example 1

[0074] 2g ZnS:Mn 2+ The fluorescent powder was placed in a mortar and thoroughly ground and mixed for 20 minutes to obtain fluorescent powder with a particle size of 200 mesh.

[0075] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0076] Comparative Example 2

[0077] 2g of ZnS:Cu phosphor was placed in a mortar and ground and mixed thoroughly for 20 minutes to obtain phosphor with a particle size of 200 mesh.

[0078] Mix 4g of epoxy resin and 1.2g of polyetheramine D230, stir for 10 minutes, add phosphor, and continue stirring for 10 minutes; place the stirred mixture in a vacuum drying oven, evacuate and maintain vacuum for 10 minutes to fully remove air bubbles; spray the mixture onto the surface of the device to be tested, and then place it in a 70℃ oven to cure for 30 minutes to obtain a triboluminescent coating with a thickness of 500μm.

[0079] Performance testing

[0080] Test Example 1

[0081] Figure 1 The images show actual photographs of the triboluminescent coatings obtained in Examples 1 to 6, from left to right: Examples 1 to 6.

[0082] The triboluminescent coating obtained in Example 5 was sliced, and the slices were examined by scanning electron microscopy and elemental analysis. The test results are as follows: Figure 2 As shown, from Figure 2 It can be seen that the two phosphors are evenly distributed in the resin sheet and there is no obvious sedimentation.

[0083] Test Example 2

[0084] A rotational friction test was conducted on the triboluminescent coating obtained in Example 5. The test procedure was as follows: the rotational friction testing machine was turned on, and after the rotational speed of the machine reached the set value, a load was instantaneously applied to the triboluminescent coating, and the second emission spectrum after contact was collected; the test results are as follows. Figures 3-4 As shown,

[0085] from Figure 3 It can be seen that as the linear velocity increases, the triboluminescence spectrum changes, and the color of the mixed light changes from orange to green;

[0086] Fit the intensities of the two peaks in the spectrum separately, such as... Figure 4 As shown, the mixed light was found to originate from ZnS:Mn 2+ It consists of orange light with a center wavelength of 590nm and green light from ZnS:Cu with a center wavelength of 520nm. As the linear velocity increases, the intensity of both colors increases, but the green light increases faster with the linear velocity. Therefore, at high linear velocities, green light becomes dominant.

[0087] Test Example 3

[0088] Rotational friction tests were conducted on the triboluminescent coatings obtained in Comparative Examples 1 and 2, following the test procedure described in Test Example 2. Emission spectra were collected, and their peak intensities were fitted. The results are as follows: Figure 5 As shown, from Figure 5 It can be seen that as the linear velocity increases, ZnS:Mn 2+ The triboluminescence of both phosphors and ZnS:Cu phosphors increases, with ZnS:Cu phosphor showing a higher triboluminescence compared to ZnS:Mn. 2+ The phosphor grew at a faster rate, consistent with the results of Test Example 2. And ZnS:Mn 2+ The growth rate of the green light emitted by ZnS:Cu was lower than that of the orange light in Example 5, which is attributed to the fact that in Example 5, the green light emitted by ZnS:Cu would excite the ZnS:Mn light. 2+ Glowing light.

[0089] Test Example 4

[0090] With a fixed linear velocity of 12π cm / s, rotational friction tests were conducted on the triboluminescent coatings obtained in Examples 1-6, following the test procedure described in Test Example 2, and emission spectra were collected. The results are as follows: Figure 6 As shown, under a fixed linear velocity condition, the spectrum will change as the ratio of the two phosphors changes. In actual operation, the threshold for linear velocity detection can be adjusted by changing the ratio of the two phosphors.

[0091] Test Example 5

[0092] With a fixed linear velocity of 12π cm / s, the applied loads (100g, 500g, and 1000g, respectively) were varied, and a rotational friction test was conducted on the triboluminescent coating obtained in Example 5, following the test procedure in Test Example 2. The emission spectra were collected. The results are as follows: Figure 7 As shown, the intensity of both peaks increases with increasing load, but the peak intensity originating from ZnS:Mn... 2+ The peak at the center wavelength of 580 nm grows faster. Therefore, as the load increases, the spectrum changes from green to orange. Thus, the load conditions must be kept constant during online velocity detection in this invention.

[0093] Test Example 6

[0094] The triboluminescent coating obtained in Example 5 was subjected to rotational friction tests at different temperatures, following the test procedure in Test Example 2, and emission spectra were collected. The results are as follows: Figure 8 As shown, the color of the mixed light changes from green to orange as the temperature increases. This is attributed to the different thermal quenching properties of the two phosphors; the ZnS:Cu phosphor exhibits a faster decrease in luminescence intensity with increasing temperature, thus causing the triboluminescence to change from green to orange at high temperatures. Therefore, in online velocity detection, the temperature must be controlled at room temperature.

[0095] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. Other embodiments can be obtained based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. The application of triboluminescent coatings in online speed detection, characterized in that, The triboluminescent coating comprises a resin and a mixed phosphor; The mixed phosphor includes ZnS:Mn 2+ Phosphors and ZnS:Cu phosphors; ZnS:Mn in the mixed phosphor 2+ The mass ratio of phosphor to ZnS:Cu phosphor is 85~97.5:2.5~15; The application includes the following steps: A mixture of phosphor, resin and curing agent is applied to the surface of the device to be tested and then cured sequentially to obtain a triboluminescent coating. The triboluminescent coating was subjected to rotational friction testing, and the color of the emission spectrum was observed at different linear velocities. When the emission spectrum shows orange-dominant orange-green mixed light, the linear velocity is less than 6 cm / s; When the emission spectrum shows an orange-green mixture with equal proportions of orange and green light, the linear velocity is equal to 6 cm / s; When the emission spectrum is a mixture of orange and green light with green light dominating, the linear velocity is greater than 6 cm / s.

2. The application according to claim 1, characterized in that, The particle size of the mixed phosphor is 50~400 mesh.

3. The application according to claim 1, characterized in that, The thickness of the triboluminescent coating is 500 μm.

4. The application according to claim 1, characterized in that, The resin is epoxy resin; The mass ratio of the mixed phosphor to the resin is 1:1~5.

5. The application according to claim 1, characterized in that, The mass ratio of the resin to the curing agent is 10:

3.

6. The application according to claim 1, characterized in that, The curing temperature is 70℃ and the time is 20~30min.

7. The application according to claim 1, characterized in that, The process of rotational friction detection is as follows: Turn on the rotary friction tester, and once the rotational speed of the rotary friction tester reaches the set value, apply a load instantly to the triboluminescent coating and collect the second emission spectrum after contact.

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