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Equipment function and application scope of semi-automatic polarization stress meter PSV-702

  • Source: Unknown
  • Date: November 27, 2021
  • Number of views: seventy-four
Equipment function:
Semi-automatic polarization Stress meter PSV-202 uses the automatic Senarmont compensation method (Cenamon) to quantitatively measure the stress in the transparent body. In the previous manual Senarmont compensation method, the observer needs to rotate the dial compass to distinguish the brightest position and the darkest position, so it is easy to generate errors.
 
The device will automatically detect the brightness of the image, so as to reduce human error. It is equipped with a zoom lens, and can also detect small size samples. Equipped with a computer, it is convenient to save the measured data and images. In addition, the direction of stress can be more clear through the detection of photosensitive color method. Senarmont (compensation method); It is used for stress detection with two methods of photosensitive color method and machine vision processing method, which greatly improves the measurement accuracy; It can measure the stress of transparent glass products of various shapes, not only the magnitude of stress, but also the direction of stress (compressive stress or tensile stress); Equipped with computer and special measurement software, it can not only reduce the measurement error caused by human factors, but also save and manage the test data. Measurement principle: based on the photoelastic principle, the measurement is carried out.
 
Equipment features:
Reduce the artificial error, input the photoelastic coefficient and depth of the measured object in advance, and calculate the stress automatically
 
Equipment use:
1. Quantitative detection of residual stress of glass products
2. Stress detection of plastic products
3. Phase difference measurement of optical film
4. Whether the stress of crystalline material exists
 
Test method:
Qualitative analysis and detection by sensitive color method:
According to the color on the sample that is different from the background color of the machine, it can be preliminarily determined that there is stress at this position
 
Quantitative detection by Senarmont compensation method:
According to the preliminary judgment of 1, after switching the detection method, the stress part is accurately tested. 34.4 is the gray value in the interface. The gray value is adjusted to the minimum by manually rotating the machine dial, as shown in the figure below, the gray value is 16.5. At the same time, the left dial is consistent with the degree of actual manual rotation. At this time, the software automatically calculates the stress data result of 31.67nm
 

The above is the sharing of the "semi-automatic polarizing stress gauge PSV-702 equipment function and scope of application" by Dongyi Seiko, the stress gauge supplier.
The glass surface stress meter is used to check the size and distribution of stress in transparent objects. It is not only widely used in optical glass, optical instruments, glass products, plastic products and other industries, but also plays an important role in the inspection of safety explosion-proof indicators of building materials, lamps, pharmaceuticals, beverages, handicrafts, and also has many applications in the fields of crystal jewelry production, geology and minerals, and materials science. At the same time, the surface stress instrument provided by Dongyi Seiko is also an ideal teaching experimental equipment for colleges and universities.

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