To test its own transducers and those of industrial customers, CUE has a wide range of measurement equipment including an impedance analyser and several laser vibrometer systems provided by Polytec Ltd.
Detailed knowledge of the mechanical behaviour of a transducer across its operational bandwidth is an essential component in ascertaining the suitability of a device for a particular application. To achieve this, CUE has two state-of-the-art laser vibrometer scanning systems for non-contact measurement of surface displacement at its disposal. The combination of the two systems provides a wide surface motion measurement bandwidth for a broad array of arbitrarily shaped transducers, typically 0.1 kHz to 20 MHz, and a large absolute displacement range from 0.3 pm to several mm. In addition, these systems are coupled with a multi-axis scanner for use in the tomographic reconstruction of acoustic pressure field distributions. See our research on Field Measurement.
CUE’s expertise in this area has led to a number of international collaborations, with both academic and industrial institutions, covering a diverse range of applications such as: characterisation of a variety of novel ultrasonic transducers and their radiated fields; investigating the vibrational response of NDE and chemical processing systems; and the measurement of displacement associated with dynamic MEM devices.