JINHE JY-PHb contact angle Tester, automatic test, static drop method, increasing or decreasing drop method, inclined plate method

JY-PHb Contact Angle Meter is used to measure the contact angle between solid, liquid and gas phases. By measuring the contact angle, calculate and measure the surface physical and chemical properties such as the adhesion of liquid to solid and the surface energy of solid. The instrument is widely used in petroleum, chemical industry, medicine, papermaking, dyestuff and various new materials research and manufacture fields. Using computer technology, the ingested images are transferred to the computer for storage, analysis and printing. The speed is fast, the data is accurate, and the operation is convenient. The equipment has the function of automatic contact angle analysis, with high degree of automation and high measurement accuracy.

key features

Automatic contact angle analysis

Using machine vision technology, the baseline and droplet contours are automatically identified, and the quadratic curve fitting calculation is performed based on the Laplace equation to obtain the contact angle value. The effect of gravity on the shape of the droplet is reduced, eliminating human testing errors. For pictures with obvious baseline features, automatic testing can be realized, and for pictures with inconspicuous baseline features, the baseline position needs to be manually specified.

Test Methods

1. Static drip method

Drop a drop of liquid on the solid surface, take a picture of the equilibrium system after the solid-liquid-gas three-phase interface is balanced, and measure the contact angle through the contact angle measurement method provided by the software. It is also possible to take regular photos or videos of the balance process during the test, and then analyze the system change process.

2. Increase and decrease droplet method

Due to the inhomogeneity of the solid surface, it is sometimes necessary to measure the dynamic contact angle to analyze the hysteresis of the contact angle. This instrument can measure the advancing angle by continuously increasing the droplet volume or measure the receding angle by continuously reducing the droplet volume.

3. Inclined plate method (JY_PHb type)

The unique function of JH_PBb type is that the stage can be rotated electrically to form an inclination angle, and the droplet is tilted to one side under the action of gravity until it rolls. This process can measure the advancing angle and retreating angle of the droplet.

Contact Angle Analysis Method

• Automatic analysis method:

For most pictures, one-key result analysis can be realized, using computer vision analysis technology, quadratic curve fitting method, automatic measurement and calculation results. For a small number of pictures with inconspicuous baseline characteristics, a manual way to specify the baseline is provided and automatic measurement is performed. The display accuracy is 0.1°. The method basically overcomes the influence of gravity on the droplet shape, improves the test accuracy and eliminates human errors.

• The tangent method is used to measure by manually drawing the baseline and the arc tangent, which is suitable for images with severe asymmetry and manual analysis, with a display accuracy of 0.1°.

• The measurement method of the height measurement method, by drawing the circumscribed rectangle of the droplet, calculates the contact angle value geometrically, and the display accuracy of the contact angle value is 0.1°.

• The measurement method of protractor method, by drawing a protractor, the contact angle measurement is realized. The display accuracy of the contact angle value is 0.1°.

• Chord height method measurement method, contact angle value display accuracy 0.1°.

• The ellipse fitting method is used for measurement, and the display accuracy of the contact angle value is 0.1°.

• Contact angle measurement range for all methods: 0 to 180 °

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Video processing method

• Preview in a small window, take pictures and analyze in a large window. The main interface of the software has a video display window, which is used to display the video captured by the camera or the video file played. Click the thumbnail after the photo is taken to enter the contact angle analysis interface, which is easy to operate.

• Video recording and picture capture function. The test process can be recorded in real time, and the software can capture photos frame by frame after recording the video, which is convenient for capturing fast dynamic changes.

• Single photo function. Capture and save the current screen displayed by the video, and display it in the main window as a thumbnail.

• Continuous timing camera function, the Timer Setting can be adjusted arbitrarily. The interval time for taking pictures can be set, and the pictures will be taken automatically after reaching the interval time, which is convenient for analyzing the dynamic change process of contact angle.

Document and picture management

• It is possible to save a single image and select the analysis tools displayed on the image.

• All test data and pictures can be saved as a whole.

• The test results are displayed in the form of a list and can be exported to an Excel file.

• The brightness, contrast, chromaticity and other information of the camera image and the brightness of the backlight are adjusted by software settings.

• You can set the save path of videos and photos.

• The image zooming and cropping function of the photo result.

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surface energy calculation

• Surface energy calculation function, providing Fowkes equation, Owens equation, YGGF equation calculation methods.

operating environment

• Use a 64-bit Windows operating system.

• The recommended memory is 4G or more, and the hard disk space is not less than 10G.

complete-built unit X1, manual X1, certificate of conformity X1, warranty card X1

[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.