Inductive sensor

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

Item of games and sport equipment

Abstract: The device is provided by a ball body (1) of an eleastic material in which an integrated electronic circuit is embedded for detection of flight and descent characteristics of the ball body by evaluation of temperature, light, pressure and/or inductive sensor signals, for controlling an incorporated optical or acoustic display (5), or for transmitting the parameters to an external display device.

Experimental Investigation of High Temperature-Resistant Inductive Sensor for Blade Tip Clearance Measurement

Abstract: Turbine tip clearance of aero-engine is important to engine performance. Proper control of rotor tip clearance contributes to engine efficiency improvement and fuel consumption reduction. Therefore, accurate tip clearance measurement is essential. The inductive measurement method is one of the non-contact distance measurement methods, which has the characteristics of high sensitivity, fast response speed and strong anti-interference ability. Based on the principle of inductive sensor measuring tip clearance, the ambient temperature change will cause the material electromagnetic performance change for the conductivity and permeability varies with temperature. The calibration experiment was conducted to obtain the sensor resolution and sensing range. The effect of temperature on sensor parameters was extracted from high temperature experiment data. Results show the resolution of planar coil made of platinum wire can be 10 μm and the maximum sensing range can reach 5 mm. At temperature from 500 ℃ to 1100 ℃, coil inductance almost does not change with temperature while coil resistance varies exponentially with temperature, that means the coil inductance variation can reflect the tip clearance change and resistance can indicate the measuring temperature.

Non-invasive sensing of the electrical energy harvested by medical implants powered by an ultrasonic transcutaneous energy transfer link

Abstract: Ultrasonic transcutaneous energy transfer is an effective tool for powering medical implanted devices non-invasively. The power harvested by the implanted receiver is sensitive to the distance between the transmitting and receiving transducers, and to the orientation of one with respect to the other. This work describes an inductive link as a means for the contactless measurement of the voltage generated by the ultrasonically powered implanted transducer. A closed form analytic expression of the proposed sensor is presented. The sensor was successfully simulated for an implantation depth of up to 50 mm, achieving a voltage measurement accuracy of +/− 5%. The simulation is performed by exciting an external coil attached on the skin (50 mm diameter) by an AC current source (0.01 A). The excitation frequency is swept in the range of 2–6 MHz, the peak voltage across the current-source is then measured, and the resonance frequency is correlated to the equivalent inductive link impedance.

Evaluating method and circuit for an inductive sensor

Abstract: A method for evaluating an inductive sensor (1, 9), particularly a displacement sensor (1), is proposed, the set displacement (s) being determined from the measured inductance (L) of the sensor by means of a microcontroller (15). In this process, the temperature-dependent copper resistance (Ri) of the winding (2) of the displacement sensor (1) is determined by means of a measuring current which is constant in time. The microcontroller (15) is then used for temperature-compensating for the displacement (s) determined from the inductance (L) with the aid of a value corresponding to the copper resistance (Ri). The method can be used, in particular, in the case of displacement sensors which are employed in locations with highly fluctuating temperatures.