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Inductive sensor and method for the operation thereof

An inductive sensor and transmitter technology, applied in the direction of converting sensor output, inductance measurement, instruments, etc., can solve problems such as sacrificing sensor range

Pending Publication Date: 2020-08-21
BALLUFF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to improve the accuracy of tracking the lateral motion of the detected object, you will sacrifice sensor range

Method used

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  • Inductive sensor and method for the operation thereof
  • Inductive sensor and method for the operation thereof
  • Inductive sensor and method for the operation thereof

Examples

Experimental program
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Embodiment Construction

[0027] The inductance sensor 10 according to the first exemplary embodiment of the present invention has a housing 11 made of metal. The housing 11 is substantially cylindrical and has an opening closed by a plastic disk 12 on the front side of the housing. Inside the housing 11 , a circular base plate 20 in the form of a printed circuit board is arranged directly behind the plastic tray 12 . A further printed circuit board 21 is connected to the base plate 20 and extends along the longitudinal axis of the housing 11 . It carries the various electronic components of the inductive sensor 10 . On the side of the base plate 20 facing the plastic disk 12, three circular transmitter / receiver coils 31, 32, 33 are arranged, which are designed as open coils , and each coil has a winding.

[0028] Each transmitter / receiver coil 31 , 32 , 33 forms part of a measurement channel 41 , 42 , 43 . In each measurement channel 41 , 42 , 43 the respective transmitter / receiver coil 31 , 32 , ...

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PUM

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Abstract

An inductive sensor (10) has a substrate (20), on which multiple transmitter / receiver coils (31, 32, 33) are arranged side by side. It can be operated in such a way that the transmitter / receiver coils(31, 32, 33) are each stimulated independently of one another at a frequency of more than 100 MHz.

Description

technical field [0001] The invention relates to an inductive sensor. Furthermore, the invention relates to a method for operating an inductive sensor. Background technique [0002] Inductive sensors have at least one inductance in the form of an open coil. This inductance produces a magnetic field that can be varied by metallic objects near the sensor. Objects can be detected by measuring this change. For this purpose, an inductive sensor can have one or more transmitter coils and one or more receiver coils, or can have a single combined transmitter / receiver coil. It has an oscillator, an evaluation unit and an output stage. Once the supply voltage is applied to the inductive sensor, the oscillator starts to oscillate. The generated electromagnetic field is directed towards the active surface of the sensor. An approaching object draws energy from the oscillating circuit, so that the oscillating voltage of the oscillating circuit decreases. This can be detected by a do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/10G01B7/00
CPCG01V3/10G01B7/00G01D5/2006H03K2017/9527H03K17/9535G01R27/267G01R27/2611
Inventor 加格罗·帕斯卡埃伯勒·帕特里克
Owner BALLUFF