Ultrasonic planar array sensor suitable for partial discharge detection of transformer
A technology of partial discharge detection and planar array, which is applied in the direction of testing dielectric strength, etc., can solve the problems of inability to effectively detect signals on site, poor anti-electromagnetic interference ability of sensors, and low sensitivity, and achieve flexible beam control and good interference Rejection ability, effect of high signal gain
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[0013] as attached figure 1 , 2 As shown, the present invention is composed of 16 piezoelectric array elements 7 arranged in the silicone rubber filling material 9 in the stainless steel shell 8, and the 16 piezoelectric array elements 7 are respectively passed through the array element lead wire 4 and the 16-core cable 1 phase connection, and a stainless steel protective film 6 is provided at the bottom of the stainless steel shell 8 .
[0014] In the present invention, a stainless steel cover 3 with a 16-core cable 1 is arranged on the upper end of the stainless steel shell 8 , and a compression nut 2 is arranged between the 16-core cable 1 and the stainless steel cover 3 .
[0015] The ultrasonic planar array sensor of the present invention is composed of 16 piezoelectric array elements 7 (piezoelectric ceramic array elements), and the distance between the piezoelectric array elements 7 is 5 mm. Each piezoelectric array element 7 includes four major parts: a square piezoe...
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