Patent ID: 7930940
Filing Date: 2011-04-26
Classification: G01N

Abstract:
1. An ultrasonic transducer incorporated into and used for an ultrasonic inspection apparatus, which projects an ultrasonic wave to a sample to be examined, dipped in water, through the water, receives a reflected wave from said sample and detects a defect such as a break away or a flaw in said sample based on a wave form of an echo signal of said reflected wave, said ultrasonic transducer comprising: a transducer main part having an oscillator which emits said ultrasonic wave in accordance with a drive pulse, receives said reflected wave from said sample and outputs the received reflected wave as said echo signal; a transmitter substrate provided for producing said drive pulse which gives an energy for emitting said ultrasonic wave to said oscillator in said transducer main part; a receiver substrate provided for amplifying said echo signal received by said oscillator in said transducer main part; a housing formed as a cylindrical shape for containing a transmitter/receiver circuit substrate assembly which is formed by electrically connecting said transmitter substrate and said receiver substrate at a form confronted with each other and at a condition free to be attached and detached; and connecting member for electrically connecting between a signal input/output terminal, provided on said transmitter substrate and functioning as an output terminal for outputting said drive pulse to said oscillator as well as functioning as an input terminal for inputting said echo signal outputted from said oscillator, and said oscillator in said transducer main part, wherein, when a maximum operational frequency of said ultrasonic wave emitted from said oscillator is referred to as fmax [MHz], said connecting member is set at a length of 100/fmax [cm] or less.