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Inductive sensor device and method of detecting movement of an object

A technology of inductive sensors and objects, applied in the direction of converting sensor output, devices using electric/magnetic methods, measuring devices, etc., can solve problems such as difficulty in accurately measuring motion and inability to accurately determine real-time torque of internal combustion engines

Pending Publication Date: 2021-08-13
TYCO ELECTRONICS LOGISTICS AG (CH)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the real-time torque at the crankshaft of the internal combustion engine cannot be determined with sufficient accuracy in the prior art
Often, manufacturing tolerances also make it difficult to accurately measure the motion of objects such as the motion of a piston in a cylinder of an internal combustion engine

Method used

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  • Inductive sensor device and method of detecting movement of an object
  • Inductive sensor device and method of detecting movement of an object
  • Inductive sensor device and method of detecting movement of an object

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Embodiment Construction

[0037] The present invention provides a sensor device and method for detecting motion of a linear reciprocating object. The object's stroke and velocity can be determined by a single inductive sensor device. In the detailed description below, objects are represented by pistons moving in cylinders of an internal combustion engine. It goes without saying that the invention is not limited to this particular application.

[0038] Figure 1A and 1B An arrangement 10 for detecting movement of a piston is illustrated according to an embodiment of the invention. The piston 1 can be made of aluminum, for example, and is moved by a motion generator 2 via a crankshaft 3 in a cylinder of an internal combustion engine. The direction of the reciprocating movement of the piston 1 is shown by the double arrow. The reciprocating movement of the piston 1 is detected by an inductive sensor arrangement 4 comprising a sensor end element 5 . exist Figure 1A In the case shown in , the sensor end...

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Abstract

The present disclosure provides an inductive sensor device (4,100) for detecting a reciprocating movement of an object, comprising an oscillator circuit (13,110) comprising a sensing coil (11) configured for inducing eddy currents in the object and a processing unit (15,120). The processing unit (15,120) is configured to count oscillations of the oscillator circuit (13,110) detected in sampling periods, compare the counted oscillations with a predetermined mean value of oscillations and determine both the speed and position of the object based on the comparison of the counted oscillations with the predetermined mean value of oscillations.

Description

technical field [0001] The invention relates to an inductive sensor arrangement for measuring the velocity and position (stroke) of an object moving in a reciprocating linear manner, in particular a piston of an engine, and a method for detecting the reciprocating linear motion of the object. Background technique [0002] Accurately detecting the position (stroke) and velocity of a linearly moving object, such as in the cylinder-piston system of an internal combustion engine, is a delicate task in order to control the proper operation of a machine such as an internal combustion engine. [0003] Optical sensors, magnetic Hall sensors and inductive sensors are known in the art for detecting linear and / or rotational motion of an object. Inductive sensors operating according to Faraday's law offer advantages in terms of robustness in harsh environments as well as position sensing accuracy. Eddy current sensors represent a particularly important class of inductive sensors. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/22
CPCG01D5/225G01P3/505G01D5/2026G01P13/0073G01P3/42G01D5/12G01D5/2006
Inventor A.法鲁吉亚
Owner TYCO ELECTRONICS LOGISTICS AG (CH)