Reducing misjudgment of high-pressure boiler pipe eddy current testing

Reducing high-pressure boiler pipe eddy current testing misjudgment several key factors:

(1) Coil eddy current testing and inspection center roller consistency in relation to the accuracy inspection rate high pressure boiler tube inspection system of the entire product, the coil center alignment requirements than the sample through holes circumferentially poor sensitivity ≤2dB, signal to noise ratio ≥ 8dB.
(2) If it is found the instrument signal is mixed at the time of commissioning, then the damage to the comparative sample coil or bad and should be replaced.
(3) The pinch roller clamp adjustment principles: to promote the pinch rollers and high pressure boiler tube is driven not just appropriate, to ensure stable concentricity testing, reducing the impact of false positives.

With the above high pressure boiler tube eddy current testing method misjudgment rate can be controlled within a minimum range, in particular the master of abnormal signal processing method of the gram to ensure the smooth conduct of the production site.