An impedance spectroscopy-based cell/particle position detection method in microfluidic systems is presented. A single pair of non-parallel surface microelectrodes was utilized to detect the transverse positions of particles/cells flowing in a microchannel without the need for a multi-electrode multi-channel impedance detection. This method can be a simple solution for high-throughput and low-c...

We investigate the axial position detection of a trapped microsphere in an optical trap by using a quadrant photodiode. By replacing the photodiode with a CCD camera, we obtain detailed information on the light scattered by the microsphere. The correlation of the interference pattern with the axial position displays complex behavior with regions of positive and negative interference. By analyzi...

Position detection of hydraulic cylinder pistons is crucial for numerous industrial automation applications. A typical traditional method to excite electromagnetic waves in the structure and analytically solve piston position based on scattering parameters measured by a sensor. The core this approach physical model that outlines relationship between targeted position. However, has shortcomings ...