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Inductive verses capacitive sensors
World Pumps, 2013Both capacitive and inductive position sensors use a non-contact technique to measure position; both use AC electrical phenomena and both can be built using printed circuit boards. This article looks at the fundamental physics behind each technique and outlines the consequent strengths and weaknesses of each approach.
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Static induction transistor image sensors
IEEE Transactions on Electron Devices, 1979New image sensors, based on the operational principle of static induction transistor (SIT), are described in this paper. Two operational modes of SIT image sensors are described here. One is the electron-accumulation mode in which electrons are stored in the floating-cell region and another is the electron-depletion mode in which electrons are removed ...
J. Nishizawa, T. Tamamushi, T. Ohmi
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Online Inductance Estimation of Speed Sensor less Induction Motor Drives
2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2020Induction motor (IM) drives with field-oriented control scheme are widely used in the industry. Motor drives with speed sensors (encoders) decreases the reliability and robustness of the system in hostile environments. This increases the demand for speed sensorless motor drive schemes.
Harshith Reddy V +2 more
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High-Sensitivity Inductive Pressure Sensor
IEEE Transactions on Instrumentation and Measurement, 2011A new type of pressure sensors with extremely high sensitivity is introduced. Unlike piezoresistive, capacitive, and linear-variable-differential-transformer-based pressure sensors, the new sensor is based on a technique for substantially changing the inductance of a coil. The prototype device has demonstrated a change in inductance of approximately 34.
Ezzat G. Bakhoum, Marvin H. M. Cheng
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Induction coil sensors—a review
Measurement Science and Technology, 2007This review describes induction coil sensors, which are also known as search coils, pickup coils or magnetic loop sensors. The design methods for coils with air and ferromagnetic cores are compared and summarized. The frequency properties of coil sensors are analysed and various methods for output signal processing are presented.
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PT-Symmetric Inductive Displacement Sensors
2018 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2018We propose a new type of wireless displacement sensor based on the concept of parity-time (PT)-symmetry. The PT-symmetric wireless sensor consists of a -RLC tank (reader) and a RLC (tag) tank, which are inductively coupled to fulfill the PT-symmetry condition.
Mehdi Hajizadegan +2 more
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Inductive powering of sensor modules
Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005., 2005An inductively powered system, aimed at providing wireless power to sensor modules, has been built and tested. The goal of the work is to determine the limits in terms of distances, and power transferable, using a 13.56 MHz system. Powering distances of up to 10 cm were obtained for power levels up to 1 mW.
T. O'Donnell +5 more
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Flow sensor fault during induction
Canadian Journal of Anesthesia/Journal canadien d'anesthésie, 2021Yuki Kojima +2 more
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Force measurement using an inductively coupled sensor
Review of Scientific Instruments, 1978A low-compliance, high-bandwidth force sensor is described. The bending of a quartz plate is converted to an analog voltage by using a phase-locked loop to measure the change in frequency of two oscillators inductively coupled to the plate. The resolution of the sensor is approximately 10−5 N, with a bandwidth of approximately 1 kHz.
H A, Ashworth, J R, Milch
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Inductive Sensor for Temperature Measurement in Induction Heating Applications
IEEE Sensors Journal, 2012A new inductive sensor for temperature measurement in domestic induction hobs and results of its applications are presented. It consists of a coil and a resonant electronic circuit which measures the impedance variation of ferromagnetic pots when their temperature changes.
Carlos Franco +4 more
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