Method for the contactless tapping of communication signals
A communication signal, non-contact technology, used in non-contact circuit testing, near-field transmission systems using capacitive coupling, line transmission components, etc., can solve the problem of unsatisfactory results, inability to extract, and inability to detect voltage signals And other issues
Active Publication Date: 2017-09-08
IMF ELECTRONIC GMBH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, if you are dealing with a multicore cable, the individual wires cannot be separated and clamped in such a way that extraction cannot be done, or the detected signal is too weak for the reconstruction of the original signal to produce results that cannot satisfying
Moreover, this method only detects the current level, but cannot detect the voltage signal
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] Figure 1a and 1b A cross-section of a multi-core cable 1 is shown in each case. Shown here is a typical industrial application of a twisted four-wire control cable. Generally speaking, the diameter of the cable is about 5mm, covered with PUR or PVC skin. Generally, two of the four cores are power supply lines, one is used for analog processing values, and the other is used for communication. Using this cable, two communication units are connected to each other, one of which is a sensor or actuator and the other is a digital evaluation or control unit, such as a PLC. What is necessary here is one-way or two-way communication between the two units in half-duplex mode, that is, the two units cannot exchange information with each other at the same time, but can only exchange one after another. For example, the sensor may be a fieldbus device, such as a pressure, temperature, flow or level gauge, which is connected to a digital evaluation unit or to a parameterization un...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for the contactless tapping of communication signals that are exchanged between two communication units, in particular a sensor or actuator and a digital evaluating or control unit, wherein the communication signals are transmitted on a line (2) of a multi-core cable (1) as voltage signals. According to the invention, in order that the communication signals can be tapped also in the case of multi-core cables without the line having to be interrupted for this purpose, the communication signals are tapped capacitively, wherein at least two electrodes (10a, 10b), which lie on the cable sheath and the angular position of which in relation to the cable axis is variable, are used for the tapping and the angular position at which the differential signal between the two electrodes (10a, 10b) is maximized is determined, wherein the at least two electrodes (10a, 10b), each consisting of a plurality of individual electrodes (E1-E8), are designed as collection electrodes and the various angular positions of the collection electrodes (10a, 10b) are achieved in that the association of the individual electrodes (E1-E8) with the at least two collection electrodes (10a, 10b) is sequentially changed by means of a controller (26). The invention further relates to an assembly for performing said method.
Description
technical field [0001] One aspect of the invention relates to a method for the contactless extraction of communication signals which are exchanged between two communication units, wherein the communication signals are transmitted as voltage signals on the lines of a multi-core cable. The two communication units are in particular sensors on the one hand and actuators and digital evaluation or control units on the other hand. Furthermore, the invention relates to an assembly for carrying out such a method. Background technique [0002] In the practice of automation technology, we need to constantly "eavesdrop" on the data communication in the signal line, for example in order to analyze the communication between the master and the slave of a fieldbus system. It is often not advisable to separate the signal lines at the corresponding point in this case, since this would involve at least one temporary shutdown of the plant. In the conventional art, current clamps and similar t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/46H04B5/00G01R31/312
CPCG01R31/312H04B3/46H04B5/22G01R27/2605
Inventor 维尔纳·霍赫阿尔弗雷德·瓦格纳
Owner IMF ELECTRONIC GMBH