Inductive sensor

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

Inductive sensor module assembly with a center signal processor

Abstract: Embodiments of the present invention are directed to a novel inductive rotational position sensor that includes a sensor module having transmitting and receiving coils formed on a printed circuit board with a signal processor located in a center area enclosed by the transmitting and receiving coils. This arrangement permits a more compact sensor module. The entire sensor module can be positioned inside a cavity, which has a diameter generally the same as the diameter of the rotational element whose position is being sensed. The arrangement also permits a coupler to be formed on the end of the target. The sensor is concentric with the transfer case shaft and an annulus bore of a transfer case. The sensor is non-contacting and has no movable parts.

Non-destructive testing of ferromagnetic materials using hand inductive sensor

Abstract: Purpose: The need for reliability of industrial structures, machines and other equipment requires more accurate testing of structural materials, especially ferromagnetic materials. Therefore, it is important to improve existing or develop new, more accurate methods and devices for non-destructive testing. Design/methodology/approach: Non-destructive testing of ferromagnetic materials is carried out by surveying a local magnetic field or determining the section magnetic resistance of a material using the proposed new type of sensor as the hand inductive element on a toroidal core with additional magnetic cores. Findings: This sensor has a simple design and high response characteristic, which has been confirmed experimentally. Such a sensor can be used for testing welded joints by the proposed method, which is based on measuring the magnetic resistance of the welding area. Research limitations/implications: Analytical physical processes research that occurred in the magnetic core material of the sensor coil core, used as a sensitive element, is complicated by the nonlinearity of the magnetization curve of the material of the core of the sensitive element and the lack of a single analytical relationship to fully describe the magnetization process of ferromagnetic materials of inductive elements. Therefore, each copy of the sensor will be an individual graduation. Practical implications: The proposed version of the hand inductive sensor allows to perform non-destructive testing during the operation of ferromagnetic structures and without special requirements to external conditions with low costs and the possibility of computer processing of data. Originality/value: The use of the nonlinearity zone of the magnetization curve of the inductive element core material made it possible to obtain a variant of a magnetic sensor that is close in sensitivity to fluxgate and, at the same time, is much simpler in design using non-deficient materials. The use of a ferrite core with low saturation induction requires a small circuit supply voltage, but a generator power reserve. The proposed hand inductive sensor is sensitive to the presence of extraneous ferromagnetic objects, and responds only to a magnetic field. The high magnetic resistance of the inductive sensor allows it to be used on uneven and dirty surfaces. High sensitivity allows to detect small deviations of the magnetic fields of dispersion of a welded joint with their comparison along the entire joint length. All of this gave new opportunities for more accurate non-destructive testing of structural elements and materials.

Inductive sensor for regulating presses and recognizing workpieces in preset locations, has magnetic core with winding and insulation path

Abstract: An inductive sensor has a housing (10) containing a winding (26) around a core (18) fabricated from magnetic material. The core has at least one insulation path (24) around it, with an axial extension larger than the winding.

Non-Contact Evaluation of Hardened Steel Samples using Inductive Spectroscopy

Abstract: When the metal undergoes the process of cold work and temperature treatment, the magnetic properties of the metal changes. The determination of metal hardness is vital in these processes. Thus, the need for non-destructive metallic material hardness analyzers is increasing.In this paper, we propose to design, test and evaluate an inductive sensor system, which can analyze the hardness level of metallic materials in relation to the lift-off between metal surface and coil sensor. In this work, we have used an eddy current inductive sensor, which can differentiate between unhardened and hardened metal surface on the basis of magnetic properties like ‘permeability’. The eddy current sensor was designed and tested with an impedance analyzer in the frequency range of 4 kHz to 4 MHz over the metallic surface and the inductance results were compared to the Dodd and Deeds model simulation on MATLAB. The system evaluation shows the different permeability values for unhardened and hardened metal surfaces thus, Dodd and Deeds model together with non-contact inductive sensor system design can be used for analysing hardness level of ferromagnetic materials.

Sensor e.g. inductive sensor, for detecting metallic object in maximum distance, has spacer element holding sensor while mounting sensor in operating distance towards object and removed from sensor after mounting

Abstract: The sensor (10) has a mechanical spacer element (30) attaching the sensor at an operating distance while mounting the sensor. The spacer element is connected with the sensor and holds the sensor while mounting the sensor in the distance towards an object (12) i.e. metallic object. The spacer element is removed from the sensor after mounting. The spacer element is designed as a bolt in a hole of the sensor or as a projection of a housing of the sensor. The spacer element is connected with a cover of the housing, and the housing is made of plastic with high glass fiber filling degree. An independent claim is also included for a method for mounting a sensor.