The newly proposed in-plane resonant nano-electro-mechanical (IP R-NEM) sensor, that includes a doubly clamped suspended beam and two side electrodes, achieved a mass sensitivity of less than zepto g/Hz based on analytical and numerical analyses. The high frequency characterization and numerical/analytical studies of the fabricated sensor show that the high vacuum measurement environment will e...

A single-tap concentric photogate pixel of 28 μm pitch is developed for application to time-of-flight (ToF) three dimension (3D) image sensors. The 198×108 ToF pixel array exhibits demodulation contrast higher than 50% and distance error less than 1%, over 1 to 7 m range using 20MHz modulation of 850 nm light emitting diode (LED) illumination.

Predictive maintenance is becoming increasingly important in industry and requires continuous monitoring to prevent failures anticipate processes, resulting reduced downtime. Vibration often used for failure detection equipment conditioning as it well correlated the machine’s operation its variation an indicator of process changes. In this context, we propose a novel energy-autonomous wireless ...

an extended octagonal ring (eor) transducer was designed and developed to measure forces inside the compression chamber of a large square baler in different directions. the transducer was calibrated by applying forces in three directions simultaneously and independently. the sensor revealed excellent linearity along with small cross sensitivities. horizontal and vertical primary sensitivities o...

The newly proposed in-plane resonant nano-electro-mechanical (IP R-NEM) sensor, that includes a doubly clamped suspended beam and two side electrodes, achieved a mass sensitivity of less than zepto g/Hz based on analytical and numerical analyses. The high frequency characterization and numerical/analytical studies of the fabricated sensor show that the high vacuum measurement environment will e...

Executive Summary: Wireless autonomous sensors that harvest ambient energy are attractive solutions, due to their convenience and economic benefits. A number of wireless autonomous sensor platforms which consume less than 100μW under dutycycled operation are available. Energy harvesting technology (including photovoltaics, vibration harvesters, and thermoelectrics) can be used to power autonomo...

Sequence-based schemes determine beacon sequence to help sensor node localization. Due to the ambiguity of RSS over distance, sequence-based scheme may have RSS-inconsistency problem, i.e., no location in the localization space could match the beacon sequence. Besides, determining the matched location is costly. In this paper, we introduce a RSS-inconsistency avoidance localization scheme, whic...

This paper presents a low-power generic interface circuit compatible with smart microsystems and capable of interfacing with a large variety of capacitive sensors. The interface chip is highly programmable, can communicate with an external microcontroller over a standard sensor bus, supports sensor selftest, and includes a temperature sensor. The circuit can interface with up to six external se...

soil compaction and moisture content are two of the factors that greatly influence variations in crop yield. capacitance-based sensor is a sensitive device for estimating soil water content. in this method of soil moisture content measurement, soil acts as the dielectric of the capacitor. throughout this research work, a capacitance-based moisture sensor that can measure the soil moisture conte...