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Method and apparatus for communication by means of a transformer

A technology for transformers and equipment, applied in the field of communication and equipment with the aid of transformers, can solve problems such as high interference sensitivity

Active Publication Date: 2014-01-29
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage in the case of amplitude modulation is the relatively high interference susceptibility to the signal coupled in

Method used

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  • Method and apparatus for communication by means of a transformer
  • Method and apparatus for communication by means of a transformer

Examples

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Embodiment Construction

[0028] figure 1 A schematic block diagram of a device for communication and power transmission by means of a transformer 3 is shown. The transformer 3 forms the interface between the primary side I and the secondary side II. The primary side I has a voltage source 4 . The secondary side II does not have its own energy source, but is instead supplied with energy from the primary side I. Consumers 5 on secondary side II are, for example, sensors for determining and / or monitoring one or more process variables. The primary side I and the secondary side II each have a logic unit 1 and 2 which, inter alia, control the communication via a transformer 3 . Energy and signal transmission from the primary side I to the secondary side II and signal transmission from the secondary side II to the primary side I take place via the transformer 3 , which is essentially formed from a primary coil 31 and a secondary coil 32 . Therefore, the transformer 3 can also be called a transfer agent. ...

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Abstract

The invention describes a method for communication by means of a transformer (3), which has at least one primary-side coil (31) and one secondary-side coil (32), which are part of a resonant circuit, wherein an excitation frequency is applied to the resonant circuit on the primary side. The invention is characterized by the fact that, in order to transmit a signal from the secondary side (II) to the primary side (I), the inductance of the secondary-side coil (32) is modulated. A corresponding apparatus for implementing the method is likewise claimed.

Description

technical field [0001] The invention relates to a method and a device for communication by means of a transformer having at least one primary coil and a secondary coil as parts of an oscillating circuit, wherein the oscillating circuit is supplied with an excitation frequency on the primary side. The device is, for example, a capacitive, conductive, or electro-oscillating fill level measuring device, especially an oscillating tuning fork, a temperature and / or moisture or humidity sensor or a sensor for determining the pH, conductivity, or turbidity of a medium measuring device. Background technique [0002] For field devices for process automation used in explosion-hazardous areas, an Ex-safe embodiment of power and data transmission is of great importance. For this purpose, power transmission between the electronics unit and the sensors of the measuring device frequently takes place via capacitive or inductive interfaces. For communication between the primary side and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/00
CPCH04B5/0031H04B5/0043H04B5/0037H04B5/0087H04B5/0093G08C19/06H04B5/0081H04B5/0062H04B5/00H04B5/0075H04B5/02H04L27/04
Inventor 亚历山大·米勒马丁·乌尔班
Owner EHNDRESS KHAUZER GMBKH KO KG