Conventional magnetic attraction measurement principle of coating thickness gauge
Publish Time: 2019-06-25 Origin: Site
The coating thickness gauge uses a magnetic sensor to measure non-ferromagnetic coatings and coatings on ferromagnetic metal substrates such as steel, iron,paint, powder, plastic, rubber, synthetic materials, phosphating layer, chromium, zinc, lead , aluminum, tin, cadmium, porcelain, antimony, oxide layer, etc. The eddy current sensor is used to measure tantalum, rubber, paint, plastic layers, etc. on substrates such as copper, aluminum, zinc, and tin. Anodizing coating thickness gauge is widely used for manufacturing, metal processing, chemical industry, commodity inspection and other testing areas.
Principle of magnetic attraction measurement
The amount of suction between the magnet (probe) and the magnetically permeable steel coating thickness measurement gauge is proportional to the distance between the two, which is the thickness of the coating. Using this principle to make a thickness gauge, measurement can be performed as long as the difference in magnetic permeability between the cladding and the substrate is sufficiently large. Since most industrial products are formed by structural steel and hot-rolled cold-rolled steel sheets, magnetic thickness gauges are widely used. The basic structure of the thickness gauge consists of magnetic steel, relay spring, scale and mechanism. After the magnetic steel is attracted to the object to be tested, the measuring spring is gradually elongated and the pulling force is gradually increased. When the pulling force is just greater than the suction force, the thickness of the coating layer can be obtained by recording the pull-down force at the moment of the magnetic steel detachment. They are new product automates this recording process. Different models have different ranges and applications. The ultrasonic coating thickness measurement is characterized by simple operation, ruggedness, no power supply, no calibration before measurement, and low price, which is very suitable for quality control in the workshop.