Inductive sensor

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

Method and device for measuring distances by means of inductive sensors

Abstract: Disclosed is method for measuring influence of or propagation time of inductive fields including producing and detecting a first inductive temporal field change and a first change value, producing and detecting a further inductive temporal field change and further field change, at least one of the changes being influenced by an object, comparing the first and further change values to produce a comparison value used to produce amplitude values such that amplitude of the first or further change value are substantially of the same magnitude, detecting a clock pulse alternation signal corresponding to the field change, determining a difference value by a comparison of the clock pulse alternation signals, changing the difference value to change phase delay of the first or further field change until the difference value is zero, using the phase delay to determine influence/propagation time of the inductive change.

Fit-in inductive proximity sensor and its design method

Abstract: PROBLEM TO BE SOLVED: To enhance the possibility of fitting in of a proximity sensor without affecting a sensor range. SOLUTION: The inductive proximity sensor fitted into a soft-steel mounting plate (2) includes a case with a front wall (16) of a synthetic material forming a sensing face (4) on a front side, and a sensor coil (7) with cores (9) made of a material with a relative permeability larger than 1, an oscillator (10) with a magnetic field of its coil so arranged to head toward a target (6), a hollow cylindrical metal member (3) arranged so as to surround the cores (9) vertical to the sensing face (4), and a measurement circuit (11) for measuring attenuation of the oscillator (10) due to eddy current. In order to improve on fit-in possibility of the sensor, the cores (9) are surrounded by the metal layer with an electric resistivity lower than 15 μΩ cm and a thickness less than 40 μm in a radius direction. COPYRIGHT: (C)2010,JPO&INPIT

Passive liquid-level measuring device

Abstract: The invention discloses a passive liquid-level measuring device. The device comprises at least one inductive sensor and a decoding circuit module, wherein the inductive sensor is a pressure sensor or a gravity sensor and is disposed at a liquid container and used for acquiring gravity or pressure change parameters in the liquid container in real time. The pressure or gravity change parameters are transferred to the decoding circuit module, and the decoding circuit module acquires liquid-level change parameters in the liquid container according to the prestored cross section and liquid density of the liquid container, and is connected with an external host computer through a data interface. The passive liquid-level measuring device can be installed in a household electrical appliance, and acquire the liquid-level change parameters in a container dynamically in real time.

Method for sensing positions through photoelectricity

Abstract: The invention relates to a method for sensing positions through photoelectricity. In the method, a motor and a workbench are provided; the motor drives the workbench to rotate, wherein an origin inductive sensor, a laser generator, a reflector and an aperture capable of regulating luminous flux are also provided; the origin inductive sensor is used for inducing an initial position of the workbench; the aperture is arranged on the workbench; and laser beams emitted by the laser generator pass through the reflector, and the laser beams reflected by the reflector pass through the aperture and are resonated to surfaces of reflected objects to punch marks. In the method, the thickness of lasers is controlled by adopting the aperture capable of regulating the luminous flux, so that the method has the advantages of convenient operation and high working efficiency.

Research and Modeling of a Universal Electronic Counting Converter for "Smart" Sensors of Systems and Automation Tools

Abstract: An algorithm is obtained and a simulation of an electronic counting universal Converter is performed in the MultiSim environment. An electronic circuit has been developed that implements the functions of "smart" resistive, capacitive and inductive sensors. A study was conducted and results were obtained that allow us to positively evaluate the effectiveness of the proposed devices. Issues of increasing the functionality of smart sensors by including universal second-order filters, such as links with multi-loop feedback and a structure with finite gain, are considered. The transfer functions of low -, high -, and intermediate-frequency filters are given.