Inductive sensor

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

Preformed narrow inductive vehicle sensing apparatus.

Abstract: A preformed narrow inductive sensor is disclosed that can be located in a single saw cut on a road surface to detect passing vehicles. The sensor is constructed from one or more coplanar loops 112 mounted on one or more formers 110 where the former has a solid internal structure. In a further embodiment the former may be flexible or have a semi sold structure. In a flexible form the sensor can retain the installation shape and change shape over time to match changes in the installation surface. The loops may be inclined on the former and overlap where there are more than two. Further members may be provided to link several formers throughout the length of the sensor assembly. The former may have channels 611 along the length of the former 110 in which the loop is mounted.

Aspects of Foreign Object Detection in a Wireless Charging System for Electric Vehicles Using Passive Inductive Sensors

Abstract: If the energy transfer for charging the traction battery of an electric vehicle takes place wirelessly and with inductive components, the active area of the charging system must be monitored for safety reasons for the presence or intrusion of metallic objects that do not belong to the charging system. In the past, different concepts for such monitoring have been described. In this paper, passive inductive sensors are used and characterized based on practical measurements. With this type of sensor, the detectability of metallic foreign objects is very closely related to the characteristics of the magnetic field of the charging system. By optimizing the geometry of the sensor coils, the authors show how foreign object detection can be improved even in areas with low excitation of the foreign objects and the sensor coils by the magnetic field. For this purpose, a charging system, with which charging powers of up to 10 kW have been realized in the past, and standardized test objects are used. Furthermore, the thermal behavior of the metallic test objects was documented, which in some cases heated up to about 300 °C and above in a few minutes in the magnetic field of the charging system. The results show the capability of passive inductive sensors to detect metallic foreign objects. Based on the measurements shown here, the next step will be to simulate the charging system and the foreign object detection in order to establish the basis for a virtual development and validation of such systems.

Inductive sensor device with local analog-to-digital converter

Abstract: A position sensor device includes a sensor head with a sensor coil, and an analog-to-digital (A/D) converter for digitizing output from the sensor coil, and sending the digital input to electronics of the device for further processing. The A/D converter is located closer to the coil than it is to the electronics, which may be in an electronics box mounted remotely from the sensor head. The A/D converter may be a part of the sensor head, may be adjacent to the sensor head, and/or may be connected to the sensor coil by an analog output cable. The analog output cable between the sensor coil and the A/D converter may be of negligible length (and of negligible capacitance), and in any event may be shorter than a digital output cable between the A/D converter and the electronics.

Numerical Simulation of Flaw Detection with a Capacitive Array Sensor Using Finite and Infinite Elements

Abstract: Capacitive array sensors are one among many electromagnetic techniques that can be used to detect flaws or other irregularities at or near the surface of materials. Capacitive sensors have an advantage over inductive sensors in that insulating materials may be interrogated as well as conducting materials. These sensors have seen some application in nondestructive evaluation, including flaw detection, the monitoring of porosity and thickness of thermal barrier coatings, dielectric cure monitoring, and robotic proximity sensing [1, 2]. Only surface features can be examined on metallic plates because the accumulation of surface charges blind the capacitive probe to interior features. In dielectric materials, both surface and subsurface features can be examined.

Gear shaft marking device for automobile steering system

Abstract: The utility model provides a gear shaft marking device for an automobile steering system The gear shaft marking device for the automobile steering system comprises a marking machine, a gear shaft, a first support block and a second support block, wherein the small-diameter end of the gear shaft sequentially penetrates through a first through hole and a second through hole; a bearing is abutted against the first support block; a first induction inductive sensor is arranged at one side away from the first support block, of the second support block; a second induction inductive sensor is arranged at one side away from the second support block, of the first support block; the first inductive sensor and the second inductive sensor are connected with the marking machine The gear shaft marking device for the automobile steering system is capable of effectively increasing the detection speed of the gear shaft, decreasing the labour intensity of workers, increasing the working efficiency, and meeting the need of automatic production