University of Nottingham, Department of Electrical and Electronic Engineering, Nottingham, UK.
IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Dec;57(12):2704-11. doi: 10.1109/TUFFC.2010.1744.
We investigated the possibility of substantially reducing the cost of minimally invasive ultrasonic non-destructive evaluation (NDE) of liquids, in particular, temperature sensing, using inexpensive narrowband transducers. Although designed for operation in air, ultrasonic transducers enclosed in an aluminum case could be submerged in water and were found to be suitable for this application; however, their responses changed substantially when submerged. The test cell developed was complemented by an amplifier to operate as an oscillator and some other support electronics to supervise the sensor's operation. The sensor was tested in temperatures ranging from 26 to 32°C at a nominal central frequency of 330 kHz and showed a sensitivity of around 280 Hz/K.
我们研究了使用廉价的窄带换能器，大幅降低微创超声无损检测（NDE）液体成本的可能性，特别是温度传感。虽然设计用于在空气中运行，但封装在铝盒中的超声换能器可以浸没在水中，并且被发现适用于此应用；然而，当它们被浸没时，其响应会发生很大变化。所开发的测试单元由一个放大器补充，以作为振荡器运行，以及一些其他支持电子设备来监督传感器的操作。该传感器在名义中心频率为 330 kHz 时，在 26 至 32°C 的温度范围内进行了测试，其灵敏度约为 280 Hz/K。
