Automatic Contact Angle Goniometer

Overview

The contact angle meter is used to measure the contact angle between solid, liquid and gas. By measuring the contact angle, calculating and measuring the adhesion of liquid to solid, solid surface energy and other surface physical and chemical properties. The instrument is widely used in the research and manufacturing fields of petroleum, chemical industry, medicine, paper-making, dyes and various new materials. Apply computer technology to transfer the ingested images 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

Use machine vision technology to automatically identify the baseline and droplet contours, and use the Laplace equation as the theoretical basis to perform quadratic curve fitting calculations to obtain the contact angle value.The influence of gravity on the shape of the droplet is reduced, and human test errors are eliminated. For pictures with obvious baseline characteristics, automatic testing can be realized, and for pictures with unobvious baseline characteristics, you need to manually specify the baseline position.

Hardware features

1. Video capture:

Using domestic high-end industrial cameras, the maximum image resolution is 2048*1536 pixels, high precision, high definition, and low noise. USB2.0 output, computer control gain, brightness, exposure time. USB power supply, no separate power supply is required. S/N ratio>52dB, exposure time 17uS~2.3S.

2. Lens characteristics:

Domestic high-end zoom microscope lens.

Zoom ratio: 0.7～4.5X

Magnification: 30～130 times

Best shooting distance: 95mm

Tube length: 165mm

Lens adjustment bracket characteristics: use F-type special lens bracket, adjustment range: 60mm

3. Movement characteristics of the stage:

Movement method: manual, smooth optical parts

X direction (transverse): 80mm, accuracy 0.1mm

Y direction (longitudinal): 30mm, accuracy 0.1mm

Z direction (up and down): 50mm

4. Rotating table characteristics

The domestic high-precision optical rotating table is used to drive the stage to rotate concentrically to realize the test of the forward and backward angles by turning and falling.

Rotation method: computer controlled, driven by high subdivision stepper motor, and can be adjusted manually.

Rotation angle: ≥90°

Rotation speed: computer software adjustment

Angle scale resolution: 1°

5. Monochromatic semiconductor lighting source with continuously adjustable brightness.

6. The highest frame rate: 25 frames per second

7. Dimensions: 600x310x450 mm