Common test method for coating thickness gauge
Coating thickness gauges are ideal for measuring material thickness, finding hidden internal defects, or analyzing material properties of metals, plastics, composites, ceramics, rubber, and glass. Ultrasonic instruments use frequencies beyond the human ear's hearing range to generate short bursts of sound energy that couple to a test piece, then monitor and analyze the reflected or transmitted wave patterns to obtain test results.
Coating thickness gauge popular test method 1:
1. Phased array testing is a special type of ultrasonic testing. It uses a complete multi-chip array probe and powerful software to control the direction of high-frequency sound beam propagation in the test piece and generate echo images, thereby generating medical ultrasound images Similar material internal structure details.
2. It is used to detect important structural metals, pipe welds, aerospace components, and other similar applications where additional information is provided by phased array inspection.
Method Two: Eddy Current and Eddy Current Array Testing
1. Eddy current testing uses the principle of electromagnetic induction to locate near-surface cracks, measure thickness, and classify certain material properties in metals.
2. The eddy current probe generates a magnetic field, and the coating thickness gauge can induce a current flowing in a circular trajectory in the test material. Changes in the integrity or thickness of the specimen material will in turn affect the current, magnetic field, and voltage magnitude and phase in the coil.
3. The instrument monitors the probe output and displays information for analysis. The eddy current array system uses a variety of probes to expand its detection coverage area and improve imaging capabilities.
