Purification method and device for variable-reluctance transducer

A magnetoresistive sensor and sensor technology, applied in the electrical field, can solve the problems of increasing maintenance costs, measuring operation errors, etc., and achieve the effect of reducing maintenance costs

Inactive Publication Date: 2015-12-09
QOROS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since its measurement principle determines that the variable reluctance sensor is very sensitive to the air gap between its tip and the armature, any ferrous material accumulated on the tip of the sensor may affect its reading, which in turn may cause the ...

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  • Purification method and device for variable-reluctance transducer
  • Purification method and device for variable-reluctance transducer
  • Purification method and device for variable-reluctance transducer

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Embodiment Construction

[0038] Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are assigned to components having substantially the same or similar structures and functions, and repeated descriptions about them will be omitted.

[0039] First, the basic structure of a variable reluctance sensor (VRS) will be briefly described in a specific example for a better understanding of the embodiments of the present invention. In this specific example, the variable reluctance sensor may be a sensor commonly equipped in combustion and compression engines to detect crankshaft speed. This sensor is usually called a crankshaft position sensor (CPS). CPS is one of the most important sensors in an engine. one.

[0040] figure 1 The basic structure of a specific example of the variable reluctance sensor according to the embodiment of the present invention is illu...

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Abstract

The invention discloses a purification method and device for a variable-reluctance transducer. The variable-reluctance transducer at least comprises a permanent magnet and a coil. The method includes the steps that the coil is magnetized, so that a magnetized magnetic field is generated around the coil; and the magnetized magnetic field is used for being overlapped with a fixed magnetic field around the permanent magnet, so that the total magnetic field around the variable-reluctance transducer is zero in at least at one period of time, and irony particles attracted onto the variable-reluctance transducer due to attraction of the fixed magnetic field are removed. Accordingly, by means of the purification method and device, the variable-reluctance transducer can be cleaned automatically, the variable-reluctance transducer does not need to be detached from the mounting position manually, and thus maintenance cost is lowered remarkably.

Description

technical field [0001] The present invention relates to the electrical field, and more particularly, the present invention relates to a method and device for cleaning a variable reluctance sensor. Background technique [0002] Variable reluctance sensor (also known as self-inductance inductive sensor) is a kind of inductive sensor. It can use the change of the self-inductance of the coil to achieve the purpose of measurement. Generally speaking, it consists of two parts: a permanent magnet and a coil. [0003] Typically, variable reluctance sensors can be used to measure displacement and size, and can also measure other parameters that can be converted into displacement, such as tension, pressure, differential pressure, strain, rotation, speed and acceleration. [0004] For example, in order to realize the measurement of displacement, an armature can be correspondingly arranged on the moving part to be measured. There is an air gap between them. When measuring the displac...

Claims

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Application Information

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IPC IPC(8): B08B7/00G01D5/20
CPCB08B7/00G01D5/20
Inventor 彦斯·贝肯罗伯特·丁力胡壮丰
Owner QOROS
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