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Recent research in acoustic tweezing has mainly focused on the behaviour of devices for specific applications and the fundamental theories of the forces exerted on the target particles. However, compared to optical tweezers, there have been only limited reports about developments and applications of acoustic tweezers at the system level. This paper outlines a novel design of a multichannel electronics...
Ultrasonic standing wave manipulation has been proved to be a simple, robust technology to be integrated in microfluidic systems for a range of applications such as particle filtration and concentration, particle trapping and washing, and sensor enhancement. Here we report recent progress in the design, fabrication and experimental demonstration of an electronically controlled ultrasonic array device...
This paper reports the development of a portable device of the ultrasound-based noncontact tactile display. The device is small (19×19×5 cm3), light (0.6 kg), and compact so that one can pick it up with one hand and install it at various places. This easy-to-use device is expected to lead to a wide variety of application of the tactile display, which is not necessarily related to tactile sensation...
A multi-FPGA signal processor is proposed for implementing the signal processing of underwater 3-D imaging sonar systems. The processing element of the system architecture is FPGA, and the beamforming algorithm of 3-D imaging sonar is implemented in the multi-stage parallel distributive steps. The FPGAs are connected using Low Voltage Differential Signaling (LVDS), which is in user defined protocol...
Layer detection method is applied in flaw detection of pipeline girth welds when ultrasonic is used. As every layer must be detected, the detection location is changed continuously. The focal length of traditional ultrasonic transducer is fixed. When tested location is changed, the transducer has to be changed, reducing the detection efficiency. Ultrasonic phased array transducer has the ability of...
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