Inductive sensor

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

Inductive proximity sensor adjusts effect of metallic device on reference and sensor coils to provide same sensitivity for ferro and non-ferromagnetic materials

Abstract: Inductive proximity sensor has a reference coil (24) and a sensor coil (14) designed so that a defined difference of the damping effect of a metallic neighboring device (32) on the reference and sensor coils is adjusted so that the influence of the neighboring device (32) on a sensor output signal is eliminated. INDEPENDENT CLAIM is also included for compensation method.

Method of non-intrusive inductive proximity sensing through a conductive barrier

Abstract: A method of non-intrusive, inductive proximity sensing of a target through a conductive barrier comprises the steps of: disposing an inductive proximity sensor on one side of a barrier of conductive material; disposing a target on the other side of the barrier; determining an appropriate drive frequency for operating the proximity sensor based on the conductive material and thickness of the barrier; and operating the proximity sensor with the appropriate drive frequency to non-intrusively sense the proximity of the target through the conductive barrier. The method may include the steps of: varying the gap between the target and proximity sensor over a gap range; measuring the inductive output of the proximity sensor at the appropriate drive frequency and different gaps to obtain inductive output measurements at the different gaps; determining the operating induction bandwidth of the proximity sensor operated at approximately the appropriate drive frequency from the inductive output measurements at the different gaps; and using the determined induction bandwidth for proximity sensing of the target through the conductive barrier. The gap range may be based on a sensor/target gap variation during actuation for a particular application.

Soft Inductive Coil Spring Strain Sensor Integrated with SMA Spring Bundle Actuator.

Abstract: This study proposes a soft inductive coil spring (SICS) strain sensor that can measure the strain of soft actuators. The SICS sensor, produced by transforming a shape memory alloy (SMA) wire with the same materials as that of an SMA spring bundle actuator (SSBA) into a coil spring shape, measures inductance changes according to length changes. This study also proposes a manufacturing method, output characteristics of the SICS sensor applicable to the SSBA among soft actuators, and the structure of the SICS sensor-integrated SSBA (SI-SSBA). In the SI-SSBA, the SMA spring bundle and SICS sensor have structures corresponding to the muscle fiber and spindle of the skeletal muscle, respectively. It is demonstrated that when a robotic arm with one degree of freedom is operated by attaching two SI-SSBAs in an antagonistic structure, the displacement of the SSBA can be measured using the proposed strain sensor. The output characteristics of the SICS sensor for the driving speed of the robotic arm were evaluated, and it was experimentally proven that the strain of the SSBA can be stably measured in water under a temperature change of 54 °C from 36 to 90 °C.

Tilting switch for motor vehicles - has inertial element floating in metal dished holder on suitable fluid

Abstract: The inertia switch has an inertia element in a holder, the element and the holder being provided with members securing the switching of the motor vehicle circuit. A high inertia sphere (1) forms the inertia element and carries a metal dished member (2). The sphere is floated by a liquid or gaseous medium in the holder (4). An inductive or capacitive sensor (6) is in operating connection to the metal dished member. Pref. the sphere is held in floating condition by three pressures gas bearings uniformly distributed round the sphere. Alternately, the sphere is floated in a liquid (3), such as alcohol. Typically an inductive sensor can be used, whose coil forms a part of an oscillator.

Out-of-home mode intelligent control device for indoor electricity

Abstract: The utility model relates to an out-of-home mode intelligent control device for indoor electricity. The out-of-home mode intelligent control device comprises a household distribution box and an out-of-home control device, wherein the household distribution box is used for controlling all power supply circuits in rooms; the all power supply circuits comprises interruptible power supply circuits and continuous power supply circuits; the out-of-home control device comprises a microprocessor and is connected with a dial switch, manual buttons, human body inductive sensors, a network module and an AC contactor control loop respectively; the dial switch switches in a manual or automatic control mode to realize conversion between an out-of-home mode and an in-home mode; meanwhile, a user remotely views room information via the network module and remotely controls the conversion between the out-of-home mode and the in-home mode; the microprocessor is used for controlling the conversion between the out-of-home mode and the in-home mode on an AC contactor by the AC contactor control loop according to signals of the manual buttons and the human body inductive sensors; and the human body inductive sensors are used for acquiring presence information of indoor personnel and sending the presence information to the microprocessor.