Inductive sensor

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

Measurement-bridge circuit for inductive sensors

Abstract: Inductive sensors (L1, L2) are connected in two arms of a half-bridge in a measurement-bridge circuit. A summing point (A), which is connected to a measurement line (1), is connected to the centre tap (1') of the half-bridge and to a wiper of a potentiometer (P2) of a voltage divider, in each case via a displacement resistor (R1 or R2 respectively). A temperature-dependent compensation resistor (R7), which is held at the temperature level of the inductive sensors (L1, L2), is arranged in one arm of the voltage divider. A compensation potentiometer (P3) is connected in parallel with the compensation resistor (R7). A zero-shift caused by a temperature change of the sensors (L1, L2) is compensated for by the temperature-dependent resistance change of the compensation resistor (R7).

Corrugated pipe quality detection system and detection method

Abstract: The invention discloses a corrugated pipe quality detection system and a detection method. The corrugated pipe quality detection system comprises a host and a display screen which is connected with the host. The corrugated pipe quality detection system further comprises an on-line detection device, a data processing device used for converting and transmitting data obtained by an inductive sensor, and a master controller. The inside of the on-line detection device is provided with an inductive sensor and two position sensors, wherein the inductive sensor is used for detecting the position of an inner-layer steel band of the trough of a corrugated pipe, and the two position sensors are used for detecting the position state of the corrugated pipe. The data processing device is connected with the inductive sensor. The master controller is connected with the data processing device, the two position sensors, and the host. The corrugated pipe quality detection system provided by the invention can detect the thickness of top plastics of a corrugated pipe, the thickness of bottom plastics of the corrugated pipe, the overall thickness, and the displacement of threads in real time, is cost-saving, high in operability and convenient to install, and has very high repeated accuracy and practicality.

Control systems for operating the long stator Maglev vehicle TR 05

Abstract: Operation of long stator Maglev transport systems requires instrumentation for remote control of the propulsion and for monitoring the actual operating conditions of the vehicle subsystems as well as of the propulsion itself. An additional control system is needed to provide data on instantaneous vehicle position and speed. To fulfill safety requirements, a self-contained unit has to monitor the limit values of vehicle velocity. A control system has been designed and manufactured for the TR 05 to perform these operations. It includes a slotted waveguide for wide-band transmission (0.8 GHz), a noncontact counting system which detects the teeth and slots of the stator, and inductive sensors working against trackside marks for the purpose of safe speed limit control. The system is described in detail.

Novel Eddy-Current Sensor for Industrial Deep-Drawing Applications

Abstract: A novel eddy-current sensor for monitoring the material flow in deep-drawing processes has been developed via thin-film technology. Using a stainless steel substrate, on which the sensor coil is directly fabricated, as protection provides the high wear and pressure resistance required for an application in serial production. Furthermore, the weakening of the tool that follows the installation of the sensor can be reduced due to the minor size of the sensor. Within this paper, an optimized sensor layout is developed based on a 2D-finite-element simulation. The influence of various parameters e.g. the coil’s geometry on the sensor sensitivity is investigated leading to beneficial guidelines for designing an eddy-current draw-in sensor. Measurements of the manufactured sensor prove the viability of the simulation. In addition, sensor fabrication is revealed in detail.

Detecting fluid in a conduit arrangement

Abstract: Apparatus adapted to detect fluid in a conduit arrangement. Pipe 100 defines a conduit 101 through which fluid is intended to pass. The pipe 100 includes a first fluid sensor 102 comprising a pair of metallic probes 102A, 102B and a second fluid sensor (104). The probes 102 may comprise resistive, capacitive or inductive sensors. A fluid detection device 105 is in communication with the first and the second sensors, the device being configured to output a fluid detection signal when both the first and the second sensors detect presence of fluid. In use, the first and the second sensors are positioned at different positions along a conduit arrangement and/or the first and the second sensors are disposed at different radial angles with respect to an axis of a conduit arrangement.