| 摘要 |
An improved ultrasonic thermometer of the acoustic pulse-echo type for measuring high temperatures and temperature profiles having a magnetostrictive head surrounded by an acoustic pulse generating and pulse sensing apparatus having a positioned electromagnetic coil, the magnetostrictive head joined to an elongated heat sensing wire having a plurality of discontinuities at the distal end thereof to reflect a portion of the propagated acoustic pulse, the improvement comprising a lock fixedly holding the acoustic pulse generating and pulse sensing electromagnetic coil in alignment after initial adjustment in order to achieve long term stability. More specifically, the improvements comprise placement of a circumferential groove in the elongated wire sensor proximate its joinder to the magnetostrictive head, the securing of the pulse generating and pulse sensing apparatus by an acoustic mismatched material lock at the circumferential groove, and a threaded screw for positioning the electromagnetic coil surrounding the magnetostrictive head to compensate for spurious reflection and to maintain long term stability.
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