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M9170 – shear wave phased array transducer

M9170 – shear wave phased array transducer
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M9170 – shear wave phased array transducer - 1

Ultrasonic Phased Array Transducer M9170 DATA SHEET Main technical specifications Type of transducer Type of generated ultrasonic waves Nominal refracted beam angle in steel Nominal frequency Number of elements Pitch (interelement spacing) Elevation Nominal operation angle range Nominal element delay Nominal echo pulse duration Nominal relative bandwidth Nominal sensitivity Nominal cross-talk value Operating surface adjustment Maximal amplitude of the transmitter pulse Operating temperature range Overall dimensions Weight linear array shear 55◦ 4 MHz 16 1.75 mm 10 mm 30...80◦ 1 µs 1.2 µs 30 % -80 dB -25 dB plain ±100 V -20 ÷ +45◦ C 32×18×44 mm 170 g Measurement conditions and equipment used Transmitting: Square pulse with the amplitude 100 V and the pulse duration 125 ns, equal to the half period of the nominal frequency. Amplifier with the transmission band 0.01 to 15 MHz and the input resistance 400 Ohm. The effective noise value, put on the amplifier input is max. 20 µV. Reference block: Wedge-shaped CB002-2 serial No. 004, wedge angle 55◦ . Shear wave velocity 3.250 m/s, average distance from elements to bottom surface 50 mm. Measurement Results: Are calculated as arithmetical mean values using the appropriate value of each array element. In the single crystal mode each element receives the echo signals from the backwall of the reference block. Measurement results (mean values for all elements) Operating frequency (average from the range threshold frequencies), MHz Duration of the echo pulse, µs Relative bandwidth of the echo pulse, % Sensitivity (ratio of the backwall echo pulse amplitudes and excitation pulse amplitudes), dB Cross-talk value (ratio of the pulse amplitude on the neighboring element to the excitation pulse amplitude), dB

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M9170 – shear wave phased array transducer - 2

The form of the averaged echo pulse and its spectral density Echo pulse amplitude, V Maximum spectrum frequency, MHz Lower cut-off frequency, MHz Upper cut-off frequency, MHz Delay Element No Delay, µs Acceptance results Parameter Operating frequency Within ±15 % of the nominal frequency range Duration of the echo pulse Relative bandwidth of the echo pulse ≥ nominal relative bandwidth of the echo-signal Cross-talk value Within ±3 dB relatively to the nominal value Deviation in the sensitivity of individual elements Within ±12 dB relatively to the average value Number of elements fulfilling...

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M9170 – shear wave phased array transducer 2Pages

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M9170 – shear wave phased array transducer
2Pages