Inductive sensor

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

Development of inductive sensors for a robotic interface based on noninvasive tongue control

Abstract: Tongue based robotic interfaces have shown the potential to control assistive robotic devices developed for individuals with severe disabilities due to spinal cord injury. However, current tongue-robotic interfaces require invasive methods such as piercing to attach an activation unit (AU) to the tongue. A noninvasive tongue interface concept, which used a frame integrated AU instead of a tongue attached AU, was previously proposed. However, there is a need for the development of compact one-piece sensor printed circuit boards (PCBs) to enable activation of all inductive sensors. In this study, we developed and tested four designs of compact one-piece sensor PCBs incorporating inductive sensors for the design of a noninvasive tongue-robotic interface. We measured electrical parameters of the developed sensors to detect activation and compared them with a sensor of the current version of the inductive tongue-computer interface (ITCI) by moving AUs with different contact surfaces at the surface of the sensors. Results showed that, the newly developed inductive sensors had higher and wider activation than the sensor of ITCI and the AU with a flat contact surface had 3.5 - 4 times higher activation than the AU with a spherical contact surface. A higher sensor activation can result in a higher signal to noise ratio and thus a higher AU tracking resolution.

Great-scale displacement sensor

Abstract: In the large-scale displacement sensor, the moving voice coil motor has two large reeds on the two ends of its framework with one large reed being connected to the active cell of the voice coil motor; and the measuring head below motor includes holder connected to the framework of the motor, inductive sensor in the holder, and styli in lowest connected via two small reeds in the holder to the inductor iron core. The inductive sensor is connected to the computer via the signal processing circuit and A/D converter; and the computer is also connected to the voice coil motor via D/A converter. The present invention can perform the large-scale and high-precision measurement of surface appearance.

An inductive transducer based pressure sensor for biomedical applications

Abstract: This This paper presents an inductive pressure sensor which can be employed for the acquisition of biomedical signal, and these signals can be extremely vital in monitoring and diagnosing human body conditions. Based on the nature of the application, such implementations require precise and real time measurement for measuring any biomedical parameters. The proposed inductive pressure sensor is based on the basic principle of producing inductive changes in response to the movement of a core towards a coil. Using the inductive coil, the physical parameter that is the movement of iron core is translated into a signal with proportionate output frequency change. This type of sensor offers some important criteria like high level of linearity and sensitivity. The proposed pressure sensor can be very effective as it can be used in many biomedical applications.

Projector electrodes for extending sensitivity range of a proximity sensor

Abstract: A system and method for extending a sensitivity range of a touch and proximity sensor that uses mutual capacitance sensing, the system and method providing projecting electrodes that generate an electric field in a three dimensional volume of space above a touch and proximity sensor to thereby enable the touch and proximity sensor to accurately detect the presence of one or more objects at a greater distance as compared to a touch and proximity sensor that does not have the projecting electrodes to generate a stronger electric field.

Lens featuring determination of the relative position of optical elements

Abstract: The invention relates to a lens comprising several optical elements that are disposed in a lens housing. At least one sensor array encompassing at least one capacitive sensor unit and/or at least one inductive sensor unit is provided for determining the relative position between a first optical element and a second optical element or between a load-bearing structural element of the lens and a second optical element.