Inductive sensor

About: Inductive sensor is a research topic. Over the lifetime, 2282 publications have been published within this topic receiving 21984 citations.

Magnetic impedance effect micro-magnetic sensor

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic impedance effect micro-magnetic sensor the temperature characteristic of which is stabilized and, at the same time, the power consumption of which can be reduced. SOLUTION: A magnetic impedance effect micro-magnetic sensor is provided with a head 2 which is excited in the peripheral direction by a pulse conducting current and is made of a magnetic material having high magnetic permeability, a coil 5 wound around the head 2 in the peripheral direction, and an electronic switch 4 which detects the first pulse of the voltage induced in the coil 5. Therefore, the temperature characteristic of the sensor can be stabilized and, at the same time, the power consumption of the sensor can be reduced. In addition, the sensor can obtain a high-linearity hysteresis-free magnetic field sensor characteristic due to a negative feedback effect.

Proximity switch with built-in test circuit

Abstract: An inductive proximity switch with a built-in testing circuit for monitoring movable elements in which an oscillator has an inductive control element, the impedance of which varies in response to approaching elements with a built-in electrical tester for monitoring the correct functioning of the proximity switch wherein the tester has an electrically switchable damping circuit for damping the oscillator for test purposes.

Load sensing apparatus with capacitive and inductive sensors

Abstract: A load-sensing mat comprising a pair of superposed spaced capacitance plates held together in a mat by resilient material. The load-sensing mat also contains a conductive loop for inductance dependent load detection.

Evaluation of different types of sensors and their positioning for on-line PD detection and localisation in distribution cables

Abstract: Different types of sensors can be used for on-line detection and localisation of PDs in medium voltage cables. These sensors can be placed on different locations in the substa-tions where the cable under test is terminated. Both aspects have a significant influence on the measured signals. In this paper both capacitive and inductive sensors are briefly evaluated, especially concerning their applicability for on-line measurements. Further-more, when the sensors are applied on-line, it is essential to realize which signals are being measured. Especially when three-phase belted cables are being measured, the situation differs considerably from off-line situations. When the cable is on-line, i.e. powered by the network itself, all three the phases are energized simultaneously. This means the PD pulses are propagating through two distinctive propagation modes: the Phase-to-Phase (PP) mode and the Shield-to-Phase (SP) mode. In this paper the differ-ent possible locations in a substation for placing sensors are discussed, with respect to the measured propagation modes, signal- and interference sensitivity, safety and practi-cal applicability. Field measurements confirm the findings.

Electronic nose sensor array, sensor system including the same, method of manufacturing the same, and analysis method using the sensor system

Abstract: Provided are an electronic nose sensor array which can easily measure and process a sample using a personal information terminal and can be mass-produced, a sensor system including the same, a method of manufacturing the electronic nose sensor array, and a analysis method using the electronic nose sensor system. The sensor array comprises a plurality of sensing films which are formed on a side of a polymer substrate and react to chemical species to be analyzed, thereby changing their electric resistances, and a plurality of sensing electrodes, each of which contacts both ends of each of the sensing films and senses a change of one of the electric resistances.