Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement

Pressure Loading of Piezo Composite Unimorphs

Over the past decade synthetic jets have emerged as a promising means of active flow control. They have the ability to introduce small amounts of energy locally to achieve non-local changes in the flow field. These devices have the potential of saving millions of dollars by increasing the efficiency and simplifying fluid related systems. A synthetic jet actuator consists of a cavity with an osc...

Traffic Measurement on Multiple Drive Lanes with Wireless Ultrasonic Sensors

An automated traffic measuring system for use on multiple drive lanes is proposed in this paper. This system, which uses ultrasonic sensors and a lateral scanning method, is suitable for use on real traffic roads. The proposed system can be easily established and maintained in various roadway environments. In addition, the system can be adjusted to measure traffic volumes according to the size ...

Ultrasonic Power Output Measurement by Pulsed Radiation Pressure

Direct measurements of time-averaged spatially integrated output power radiated into reflectionless water loads can be made with high accuracy using techniques which exploit the radiation pressure exerted by sound on all objects in its path. With an absorptive target arranged to intercept the entirety of an ultrasound beam, total beam power can be determined as accurately as the radiation force...

A Three - Channel Piezo - Electric Pressure Recorder

A batch fabricated capacitive pressure sensor with an integrated Guyton capsule for interstitial fluid pressure measurement

In this paper, we present the design, fabrication and test of a batch fabricated capacitive pressure sensor with an integrated Guyton capsule for interstitial fluid pressure measurement. The sensor is composed of 12 μm thick single crystalline silicon membrane and a 3 μm gap, hermetically sealed through silicon–glass anodic bonding. A novel batch scale method for creating electrical feed-throug...