CN103414515A - Dynamic light source time division information transmission method - Google Patents

Abstract

The invention discloses a dynamic light source time division information transmission method, and belongs to the field of information transmission. On the premise that frequency satisfies requirements, variable time within a single-pulse period is adjusted, and a light emitting driving circuit is controlled to generate corresponding changes to achieve specific code information transmission. According to the dynamic light source time division information transmission method, due to the adoption of a light-emitting component for achieving information transmission, introduction of extra hardware facilities can be effectively reduced, and hardware structures are simpler in structure; communications can be conveniently achieved in most light-emitting component application occasions, 1 and 0 need specifically expressing in the prior art but do not need specifically coding according to the dynamic light source time division information transmission method, and therefore the dynamic light source time division information transmission method can be more conveniently and faster put into force; the dynamic light source time division information transmission method has the advantages of being strong in robustness and high in accuracy.

Description

Dynamic light source time-division information transferring method

Technical field

The invention belongs to field of information transmission, particularly relate to a kind of dynamic light source time-division information transferring method.

Background technology

Light source extensively is present in each corner of human society, such as the LED illuminating lamp because having high strength, high efficiency, the remarkable advantage such as volume is little, cost is low, easy care, pollution-free, long service life is widely used in making multi-functional demonstration panel, video screen demonstration, traffic lights and lighting etc.But the main application of light source still is confined to illumination and shows at present.How the application of expansion light source becomes the focus of research, therefore utilizes light source to realize that the idea of communication arises at the historic moment.

" take method and the device thereof of visible light as the media implementation communication " if Li Yiyang proposes, realized the signal transmission based on the signal strength signal intensity regulative mode, and this kind mode is very unstable and error rate is high when distance is slightly far away.The patent No. is 201110284925 patent: " a kind of voice information notification system based on the LED visible light ", realized the signal transmission based on the frequency modulation(FM) mode, this patent transmits data by the turn-on and turn-off of controlling LED, without any code device, this kind mode, due to the frequent conducting LED that turn-offs, can seriously cause the LED lost of life.Infrared remote control is typically by the device of light sources transmit signal, mainly utilize the ON time length of LED in the fixed cycle to carry out coded digital signal, in the single fixed cycle, can only transmit a bit binary data, the data volume that this kind mode is transmitted is little, causes the transmission time long.

Summary of the invention

Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide the optical signal transmission method that a kind of transmitted data amount is larger.

For achieving the above object, the invention provides a kind of dynamic light source time-division information transferring method, carry out according to the following steps:

Step 1, determine that the figure place n that can transmit data in base cycle, n are positive integer;

Step 2, add 0 on the binary data left side to be sent, until the figure place of binary data to be sent be n a doubly, a is positive integer;

Step 3, the binary data that will add after 0 are divided into a group, and the binary data of setting after dividing into groups is C;

The resolution of step 4, setting optical signal receiver is t; Calculate Δ T=C * t, draw the time monocycle changing value Δ T that respectively organizes data;

Step 5, to set the pulse cycle be T, and encoder sends a signal to light-emitting component by drive circuit, and driving described light-emitting component, to send a group cycle be that the light signal of Δ T+T is to optical signal receiver;

The light signal cycle that step 6, optical signal receiver will receive measures, and draw the changing value Δ T of time monocycle in base cycle, and the signal that optical signal receiver will detect sends to decoder;

Step 7, calculating Δ T/t, draw a group binary data C, and the binary data that will obtain is arranged in order by the sequencing received.

Adopt above technical scheme, compare existing information transmission mode based on frequency modulation, tonal signal intensity and tune duty ratio, the dynamic light source time-division information transferring method that this patent proposes is without numeral " 1 " and " 0 " is encoded, and the interference be subject in the signal communication process is had to stronger adaptability, the time variation that only need accurately measure driving pulse gets final product, thereby strengthened robustness and accuracy, under different applicable cases, had easy and simple to handle and portable strong characteristics

Preferably, in described step 1, determine that the figure place that can transmit data in base cycle carries out according to the following steps:

Setting the pulse cycle is T, and light source change frequency value is f _p, the resolution of optical signal receiver is t, in base cycle, the changing value of time monocycle is Δ T, 0≤Δ T≤1/f _p-T; By calculating

Draw the figure place n that can transmit data in base cycle.

Preferably, after in described step 3, adding binary data after 0 and being divided into a group, also comprise each group binary number C according to the step that converts decimal data b to;

Described step 4, by calculating Δ T=b * t, draws the time monocycle changing value Δ T that respectively organizes decimal data;

In described step 7, by calculating Δ T/t, draw a group decimal data b, convert each group decimal data b to binary data and the binary data that will obtain is arranged in order by the sequencing received.

The invention has the beneficial effects as follows: the present invention utilizes light-emitting component to realize that communication can reduce the introducing of additional hardware facility effectively, makes hardware configuration simpler.The present invention has realized dynamic light source time-division information transferring method, in most of light-emitting component application scenario, can realize easily communication, compare and now with Technology Need, mean " 1 " and " 0 " by ad hoc fashion, the present invention is without odd number word bit " 1 " and " 0 " are done to specific coding, more convenient, the present invention has advantages of strong robustness and high accuracy.

The accompanying drawing explanation

Fig. 1 is the structural representation of light signal transmission system one embodiment of the present invention.

Fig. 2 is the schematic flow sheet of the embodiment of the present invention one.

Fig. 3 is the schematic flow sheet of the embodiment of the present invention two.

Embodiment

The invention will be further described below in conjunction with drawings and Examples:

As shown in Figure 1, a kind of communication system for optical signal transmission, comprise encoder 1, drive circuit 2, light-emitting component 3, optical signal receiver 4 and decoder 5, the output of described encoder 1 connects the input of described light-emitting component 3 by drive circuit 2, described light-emitting component 3 carries out transfer of data with described optical signal receiver 4 by wireless signal, the output of described optical signal receiver 4 connects the input of described decoder 5, and described decoder 5 is for to decoding data and export decoded data.

Embodiment mono-, as shown in Figure 2, a kind of dynamic light source time-division information transferring method, carry out according to the following steps:

Step 1, setting pulse cycle are T, and light source change frequency value is f _p, the resolution of optical signal receiver is t, in base cycle, the changing value of time monocycle is Δ T, 0≤Δ T≤1/f _p-T; Right Round, by calculating

Draw the figure place n that can transmit data in base cycle, n is positive integer;

Step 2, add 0 on the binary data left side to be sent, until the figure place of binary data to be sent be n a doubly, a is positive integer;

Step 3, the binary data that will add after 0 are divided into a group, and the binary data of setting after dividing into groups is C, and convert each group binary data to decimal data b;

The resolution of step 4, setting optical signal receiver is t; Calculate Δ T=b * t, draw the time monocycle changing value Δ T that respectively organizes decimal data;

Step 5, encoder send a signal to light-emitting component by drive circuit, and driving described light-emitting component, to send a group cycle be that the light signal of Δ T+T is to optical signal receiver;

The light signal cycle that step 6, optical signal receiver will receive measures, and draw the changing value Δ T of time monocycle in base cycle, and the signal that optical signal receiver will detect sends to decoder;

Step 7, calculate Δ T/t, draw a group decimal data b, convert each group decimal data b to binary data and the binary data that will obtain is arranged in order by the sequencing received.

Embodiment bis-, as shown in Figure 3, the flow process of the present embodiment and embodiment mono-are basic identical, and difference is that the present embodiment carries out according to the following steps:

Step 1, setting pulse cycle are T, and light source change frequency value is f _p, the resolution of optical signal receiver is t, in base cycle, the changing value of time monocycle is Δ T, 0≤Δ T≤1/f _p-T; By calculating

Draw the figure place n that can transmit data in base cycle, n is positive integer;

Step 2, add 0 on the binary data left side to be sent, until the figure place of binary data to be sent be n a doubly, a is positive integer;

Step 3, the binary data that will add after 0 are divided into a group, and the binary data of setting after dividing into groups is C;

The resolution of step 4, setting optical signal receiver is t; Calculate Δ T=C * t, draw the time monocycle changing value Δ T that respectively organizes data;

Step 5, to set the pulse cycle be T, and encoder sends a signal to light-emitting component by drive circuit, and driving described light-emitting component, to send a group cycle be that the light signal of Δ T+T is to optical signal receiver;

The light signal cycle that step 6, optical signal receiver will receive measures, and draw the changing value Δ T of time monocycle in base cycle, and the signal that optical signal receiver will detect sends to decoder;

Step 7, calculating Δ T/t, draw a group binary data C, and the binary data that will obtain is arranged in order by the sequencing received.

For clearer explanation embodiments of the present invention, this patent is with f _p=50Hz, T=0.0169s, t=100us is example, and the coding of data 11011001110, the implementation procedure of decode procedure are described.

Cataloged procedure: because 0≤Δ T≤1/f _p-T, 0≤Δ T≤0.02-0.0169=0.0031s, $2^n=\frac{\mathrm{\ΔT}}{t}+1=\frac{0.0031}{100\×{10}^{-6}}+1=32,$ Obtain n=5.

So each base cycle can transmit the n=5 bit binary data, owing to 11011001110 being 11 bit binary data altogether, therefore on binary data 11011001110 left sides, add 40, obtain the binary data of 15, it is three times of n, so it is sent respectively by three base cycle:

It is 1 that first base cycle sends data 00001(decimal representation), Δ T ₁=00001B * t=100us;

It is 22 that second base cycle sends data 10110(decimal representation), Δ T ₂=10110B * t=2.2ms;

It is 14 that the 3rd base cycle sends data 01110(decimal representation), Δ T ₃=01110B * t=1.4ms.Decode procedure:

After the encoder-driven light-emitting component produces respective change, through the checkout gear in the light signal recipient, measure monocyclic transformation period in three base cycle and be respectively: Δ T ₁=100us, Δ T ₂=2.2ms, Δ T ₃=1.4ms.The data of first cycle transmission are:

Second period transmits data: $\frac{{\mathrm{\ΔT}}_2}{t}=\frac{2.2\mathrm{ms}}{100\mathrm{us}}=10110B,$ The 3rd cycle transmits data and is: $\frac{{\mathrm{\ΔT}}_3}{t}=\frac{1.4\mathrm{ms}}{100\mathrm{us}}=01110B,$ By decoder reception order, successively it is arranged, obtain whole transmission data and be: 000011011001110B, namely transmitting data is 11011001110B.

More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technical staff in the art, all should be in the determined protection range by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (3)

1. dynamic light source time-division information transferring method is characterized in that carrying out according to the following steps:

Step 1, determine that the figure place n that can transmit data in base cycle, n are positive integer;

Step 2, add 0 on the binary data left side to be sent, until the figure place of binary data to be sent be n a doubly, a is positive integer;

Step 3, the binary data that will add after 0 are divided into a group, and the binary data of setting after dividing into groups is C;

The resolution of step 4, setting optical signal receiver is t; Calculate Δ T=C * t, draw the time monocycle changing value Δ T that respectively organizes data;

Step 5, to set the pulse cycle be T, and encoder sends a signal to light-emitting component by drive circuit, and driving described light-emitting component, to send a group cycle be that the light signal of Δ T+T is to optical signal receiver;

The light signal cycle that step 6, optical signal receiver will receive measures, and draw the changing value Δ T of time monocycle in base cycle, and the signal that optical signal receiver will detect sends to decoder;

Step 7, calculating Δ T/t, draw a group binary data C, and the binary data that will obtain is arranged in order by the sequencing received.

2. dynamic light source time-division information transferring method as claimed in claim 1 is characterized in that: in described step 1, determine that the figure place that can transmit data in base cycle carries out according to the following steps:

Setting the pulse cycle is T, and light source change frequency value is f _p, the resolution of optical signal receiver is t, in base cycle, the changing value of time monocycle is Δ T, 0≤Δ T≤1/f _p-T; By calculating Draw the figure place n that can transmit data in base cycle.

3. dynamic light source time-division information transferring method as claimed in claim 1 is characterized in that:

After in described step 3, adding binary data after 0 and being divided into a group, also comprise each group binary number C according to the step that converts decimal data b to;

Described step 4, by calculating Δ T=b * t, draws the time monocycle changing value Δ T that respectively organizes decimal data;

In described step 7, by calculating Δ T/t, draw a group decimal data b, convert each group decimal data b to binary data and the binary data that will obtain is arranged in order by the sequencing received.

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