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Linear inductive position sensor

A technology for inductive position and sensors, which is applied in the direction of using electric/magnetic devices to transmit sensing components, electric/magnetic position measurement, electromagnetic measuring devices, etc., which can solve the problems of increasing the overall manufacturing cost of inductive sensors

Inactive Publication Date: 2011-05-04
KSR IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disadvantageously increases the overall manufacturing cost of the inductive sensor and also increases output signal errors that can be caused by the inclination of the coupler element relative to the drive and receive coils

Method used

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  • Linear inductive position sensor
  • Linear inductive position sensor
  • Linear inductive position sensor

Examples

Experimental program
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Embodiment Construction

[0019] first reference figure 1 , a modified linear inductive sensor 10 is shown having a multi-loop transmitting coil 12 . The loops of the transmitting coil 12 are all wound in the same direction and the transmitting coil is excited by a high frequency AC source 14 . For example, for automotive applications, the frequency of AC source 14 is typically in the range of about 2.4 MHz.

[0020] A reference coil 16 is also provided such that a portion of the reference coil 16 is wound around each end 18 and 20 of the sensor 10 . The reference coil 16 provides means for compensating for temperature, environmental factors etc. in a known manner.

[0021] The receive coil 22 may be partially or wholly contained within the interior of the transmit coil 12 . The receiving coil 22 is in the form of a bow tie and comprises two linearly aligned and adjoining sections 24 and 26 . Furthermore, these portions 24 and 26 of the receiving coil 22 are wound opposite to each other.

[0022] ...

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PUM

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Abstract

A linear position sensor having a transmitter coil which generates electromagnetic radiation when excited by a source of electrical energy and wound in a first direction. A receiver coil is contained within the transmitter coil and the receiver coil includes both a first loop wound in a first direction and a second loop wound in the opposite direction. A coupler element linearly moves along a first direction relative to the transmitter coil which varies the inductive coupling between the transmitter coil and the receiver coil as a function of the linear position of the coupler element to thereby vary the electrical output signal from the receiver coil when excited by the transmitter coil. The first and second loops of the receiver coil are linearly aligned with each other along the first direction.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 61 / 045,014, filed April 15, 2008, and U.S. Patent Application Serial No. 12 / 420,328, filed April 8, 2009, both by Incorporated herein by reference. technical field [0003] The present invention relates generally to position sensors, and more particularly to linear inductive position sensors. Background technique [0004] Modern motor vehicles typically include a number of different position sensors that generate electrical signals indicative of the sensor's position. Some position sensors produce an electrical signal output indicative of the rotational position of the sensor element, while other position sensors are linear sensors that produce an electrical output signal indicative of the linear position of the sensor element. [0005] Many previously known sensors are formed on a printed circuit board and include an excitation or tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20G01D5/22
CPCG01B7/003
Inventor R·W·埃利奥特J·K·李L·邵
Owner KSR IP HLDG
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