The Hong Kong Polytechnic University

Ching-Hsiang Cheng

Chen Chao

Yin-Nee Cheung

Yun Zhu

Po Fat Chong

King Sau Wong

A Capacitive Micromachined Ultrasonic Transducer (CMUT) having a membrane operatively connected to a top electrode and having a bottom electrode having a concave void. When a DC bias voltage is applied, the membrane is deflected towards the bottom electrode such that a peripheral edge region of the membrane is brought into close proximity with the bottom electrode and an electrostatic force proximal to the peripheral edge region of the membrane is increased.

Flexible capacitive micromachined ultrasonic transducer array with increased effective capacitance

A wearable device () to assist with the movement of limbs () connected at a joint (), the device () comprising: a linear motion generating unit () to generate linear motion, the unit () having distal end portions operatively connected to the limbs (), whereby the linear motion generated by the unit () causes the limbs () to move and pivot about the joint (); a force measuring unit () to measure a change of force applied to the limbs or linear motion generating unit (); and a displacement measuring unit () to measure the displacement of the linear motion generating unit () when linear motion is generated; wherein a predetermined distance of linear motion having a predetermined velocity is generated by the linear motion generating unit () to assist with the movement of the limbs () based on the change of force measured by the force measuring unit () or the displacement measured by the displacement measuring unit ().

Wearable device to assist with the movement of limbs

The present invention relates to a microvalve having a valve plug, connecting legs, anchors and actuators, allowing the valve plug to move vertically to open or close the valve. The valve plug can contain magnetic materials, and be operated by an actuator.

Polymer microvalve with actuators and devices

A strain sensor () for measuring strain greater than 10%, the sensor () comprising: an upper polydimethylsiloxane (PDMS) substrate () having measurement electrodes () extending therethrough; a lower PDMS substrate () bonded to a lower surface of the upper PDMS substrate (), and an upper surface of the lower PDMS substrate () having a patterned portion (); and a conductive fluid () contained within the patterned portion () in contact with the measurement electrodes ().

Strain sensor

A force sensor includes a polymeric substrate including a cavity with a tilt plane, at least two metal piezoresistors on the tilt plane, and a contact pad connected to the metal piezoresistors. The tilt plane may include a measured interface of from 15&#xb0; to 75&#xb0;.

Flexible piezoresistive interfacial shear and normal force sensor and sensor array

The present invention relates to a strain gauge having a conductive fluid made of a glycerin/aqueous salt mixture, and methods of making the strain gauge. The strain gauge is capable of measuring large displacement of around 30% true strain.

Growing community of inventors

Hong Kong, China

Ching-Hsiang Cheng