DE102015005403A1 - Method and installation for transmitting information in a system - Google Patents

Abstract

Method and system for transmitting information in a system with a color modulatable and / or intensity-modulated light source and receivers of different detection speed, wherein information is transmitted from the light source to the receiver, in particular simultaneously and / or at least overlapping in time.

Description

The invention relates to a method and a system for transmitting information in a system.

It is well known that in a system with radio modems, such as WLAN, information is transferable.

The invention is therefore based on the object to form an effective information transfer.

According to the invention the object is achieved in the method for transmitting information in a system according to claim 1 and in the system according to the features indicated in claim 7.

Important features of the invention in the method are that it is provided for transmitting information in a system with a color modulatable and / or intensity-modulated light source and receivers of different detection speed,
wherein information is transmitted from the light source to the receiver, in particular simultaneously and / or at least overlapping in time.

The advantage here is that different signals are sent simultaneously from a light source and receivable by different receivers. The receivers have different detection speeds.

In an advantageous embodiment, information is transmitted to another receiver of different detection speed during the transmission of information to one of the receivers. The advantage here is that at the same time from a single light source, multiple receivers with different information can be supplied.

In an advantageous embodiment, the receivers determine, in particular detect, the course of the light intensity and / or color, and from this, the respective receiver determines the particular information intended for it,
in particular, wherein the receivers are designed to be light-intensity-sensitive and / or color-sensitive. The advantage here is that information is intensity-modulated and / or color-modulated.

In an advantageous embodiment, the light source is driven by a superpositioned from sub-signals control signal,
wherein a respective sub-signal is assigned to a respective receiver. The advantage here is that different information is to be transmitted simultaneously to different recipients.

In an advantageous embodiment, the sub-signals are generated synchronized, so in particular the switching edges of the sub-signals are synchronized,
in particular wherein a first sub-signal has the lowest frequency and the other higher-frequency sub-signals each have an integer multiple of the lowest frequency. The advantage here is that the most secure, so low-error transmission of information is possible.

In an advantageous embodiment, the sub-signals are arranged in different frequency bands, in particular in the frequency domain spaced-apart frequency bands. The advantage here is that the sub-signals are transmitted from each other unaffected.

Further advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the skilled person, further meaningful combination possibilities of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or posing by comparison with the prior art task arise.

The invention will now be explained in more detail with reference to figures:

In the 1 a system according to the invention is shown with receivers of different detection speed, wherein a station, ie stationary unit, two vehicles and a human are shown.

In the 2 is schematically a modulated light source 1 , in particular a device comprising several LEDs, shown and receivers ( 1 . 2 . 3 ) with different detection speed, such as light sensor 2 , Video camera 3 and human 4 ,

In the 3 is the drive signal for modulating the modulatable light source 1 shown, which is composed of three sub-signals A, B and C by superposition.

In the 4 is shown a further drive signal, not only frequency but also color is modulated.

Like in the 1 As shown, the plant has stationary units, vehicles and also people.

Like in the 2 shown transmitting information to recipients of different detection speed is shown.

From an information source 26 The information to be sent is sent to a modulation processor 25 transmitted, which is a drive signal for the modulatable light source 1 generated.

By way of example, the recipient is a human 4 shown, which has a slow detection speed, for example 1 bit / s. The human being 4 Thus, the illumination or non-illumination of the light source 1 detect, but with a very slow detection speed.

Another receiver is a camera 3 shown, wherein the picture taken by her an image processing processor 21 is fed, which one compared to humans 4 has faster detection speed, so that detection 22 of identity information and / or position data is executable, in particular with a detection rate of example 100 bit / s.

As a third receiver is exemplified a sensor 2 whose sensor signal is a demodulation processor 23 , in particular FPGA, is supplied, so that a detection 24 of fast data, identity information and / or position data, is executable, in particular with a detection speed of exemplarily 1 Mbit / s.

As in 3 shown, for the different recipients ( 2 . 3 . 4 ) specific individual waveforms from the modulation processor 25 superpositioned, with the superpositioned signal in 3 is shown as the uppermost signal.

Thus, the light source then shines 1 This superpositioned signal from and the respective receivers detect the part signal intended for them, ie the signal component lying in their frequency band.

The waveform for the receiver with the slowest detection speed has frequencies below 10 hertz.

The signal path for the receiver with the average detection speed has frequencies above 30 Hz, with the maximum frequencies below 1 kHz. The frequencies of the receiver with the average detection speed are thus above the highest frequency of the waveform for the receiver with the slowest detection speed and below the lowest frequency of the waveform for the receiver with the fastest detection speed.

The signal path for the receiver with the fastest detection speed has frequencies above 1 kHz.

As in 4 As shown in this embodiment, not only the light intensity is modulated, but also the color of the light. The signal curve C thus shows only the course of the intensity of the first color "color 1". When the intensity of the color 1 disappears, the second color is then emitted. The light source 1 is therefore both color and intensity modulatable.

LIST OF REFERENCE NUMBERS

1

modulatable light source

2

light sensor

3

video camera

4

human

20

Detection of position, color and characters

21

Image processing processor, in particular FPGA

22

Identification of identity information and / or position data

23

Demodulation processor, in particular FPGA

24

Detection of fast data, identity information and / or position data

25

modulation processor

26

source of information

Claims (7)

Method for transmitting information in a system with a color modulatable and / or intensity-modulated light source and receivers of different detection speed, wherein information is transmitted from the light source to the receiver, in particular simultaneously and / or at least temporally overlapping. A method according to claim 1, characterized in that during the transmission of information to one of the receivers information is transmitted to other receivers of different detection speed. Method according to at least one of the preceding claims, characterized in that the receivers determine the course of the light intensity and / or color, in particular detect, and from the respective receiver for each particular information is detected, in particular wherein the receiver light intensity-sensitive and / or color-sensitive are executed. Method according to at least one of the preceding claims, characterized in that the light source is driven by a superpositioned from sub-signals control signal, wherein a respective sub-signal is associated with a respective receiver. Method according to at least one of the preceding claims, characterized in that the sub-signals are generated synchronized, ie in particular the switching edges of the sub-signals are synchronized, in particular wherein a first sub-signal has the lowest frequency and the other higher-frequency sub-signals each have an integer multiple of the lowest frequency , Method according to at least one of the preceding claims, characterized in that the sub-signals are arranged in different frequency bands, in particular in the frequency domain spaced-apart frequency bands. Plant for carrying out a method according to at least one of the preceding claims, in particular wherein the light source is a device comprising light-emitting diodes (LED).

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