We present the initial results from a cavity ring-down sensor for measuring the density of sputtered boron atoms originating from the discharge channel of a 6-kW Hall thruster. The sensor traps 250 nm light in a high-finesse cavity to greatly increase its sensitivity to boron atoms. Measurements were obtained with the thruster operating at seven conditions spanning discharge voltages from 150 t...

Thanks to the availability of different wireless communication techniques, external devices can extend today’s smartphones. Such an external device can be any kind of a sensor, for example. This thesis describes a general-purpose wireless distance sensor, which connects to a smartphone or any other device equipped with Bluetooth technology. Further, an Android application which handles the meas...

In order to meet the needs of design and feasibility virtual simulation animation experience hall, author proposes a research based on VR sensing technology. The main content this is system technology, through analysis temperature using optical technology other methods, finally constructing methods experiments analysis. Experimental results show that when light intensity 0.5 mW, voltage reaches...

We discuss synthetic receptors for haptic sensing. These are based on magnetic field sensors (Hall effect structures) fabricated using standard CMOS technologies. These receptors, biased with a small permanent magnet can detect the presence of ferro or ferri-magnetic objects in the vicinity of the sensor. They can also detect the magnitude and direction of the magnetic field.

This paper presents the overall concept of a wideband and cost-effective current sensor. The sensor consists paralleled Hall-based (LEM) transformer (CT). A significant improvement band range moderate cost proposed enable it to be used both measure instantaneous value in order precisely plot obtain signals for closed-loop control system high-frequency power electronic converters. should conside...

This paper is intended to present an advanced technique to be used in solid-state power and energy meters, more specifically through the employment of the Hall effect sensors. From a qualitative point of view, an investigation into the sensing device is performed and geometrical consideration of the Hall cells onto the performance is analyzed. Different Hall cells (basic, L, XL, borderless and ...

This paper presents a current sensing principle appropriate for use in power electronics' converters. This current measurement principle has been developed for metal oxide semiconductor field effect transistor (MOS-FET) and is based on U(DS) voltage measurement. In practice, shunt resistors and Hall effect sensors are usually used for these purposes, but the presented principle has many advanta...

We present the initial results from a cavity ring-down sensor for measuring the density of sputtered boron atoms originating from the discharge channel of a 6-kW Hall thruster. The sensor traps 250 nm light in a high-finesse cavity to greatly increase its sensitivity to boron atoms. Measurements were obtained with the thruster operating at seven conditions spanning discharge voltages from 150 t...

A new surface sensor probe comprising an angular array of Hall effect sensors has been developed for characterization of residual stresses in ferrous materials by means of stress‐induced magnetic anisotropy measurements. The sensor probe applies a radially spreading ac magnetic field to a test sample, and detects stray fields in different directions simultaneously to determine the principal str...