Communication system based on ultraviolet light intensity self-adaption

Abstract

The invention provides a communication system based on ultraviolet light intensity self-adaption, which consists of a transmitting end and a receiving end, and is characterized in that the transmitting end acquires communication data information, converts the communication data information into digital signals, modulates the digital signals and outputs the digital signals into optical signals; the receiving end converts the optical signal into an electric signal, amplifies the electric signal into a voltage signal, and converts the voltage signal into an analog digital signal; and recovering the analog digital signal into target data and displaying the target data. According to the invention, the problem that the signal recovery quality is seriously influenced by the change of the intensity of the received ultraviolet light signal is solved, and the stability of the signal after the ultraviolet light communication link establishment is effectively ensured.

Description

Technical Field

[0001] The present invention belongs to the field of electronic science and technology, and more specifically to the field of communications, and in particular to a communication system based on ultraviolet light intensity self-adaptation. Background Art

[0002] In recent years, the development and application of optical communication has received extensive attention. Ultraviolet light has the characteristics of short wavelength, fast attenuation, good confidentiality, and strong scattering, which makes it widely used in ultraviolet light scattering communication. Although ultraviolet light communication has many advantages, considering that ultraviolet scattering communication is built on a Poisson channel, the detection of ultraviolet pulses at the receiving end is a probabilistic event. The detected pulses may also change with changes in the environment, which seriously affects the performance of ultraviolet light scattering communication under a fixed detection method, and the bit error rate is difficult to reduce. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings, the main purpose of the present invention is to provide a communication system based on ultraviolet light intensity adaptation, which can effectively reduce the system bit error rate and improve the communication performance.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention provides a communication system based on ultraviolet light intensity adaptation, which system consists of a transmitting end and a receiving end. The transmitting end collects communication data information and converts it into a digital signal, which is modulated and output as an optical signal; the receiving end converts the optical signal into an electrical signal and amplifies it into a voltage signal, which is then converted into an analog digital signal; the analog digital signal is then restored to the target data and displayed.

[0007] In the above scheme, the transmitting end includes a data acquisition device, a modulation circuit and an ultraviolet LED array in sequence; wherein the ultraviolet LED array adopts a honeycomb structure.

[0008] In the above scheme, the receiving end includes a lens assembly, a photodetector, a two-stage transimpedance amplifier, a high-speed analog-to-digital converter, a core processor and a visualization device in sequence.

[0009] In the above solution, the lens assembly includes a lens and a filter assembly to filter the modulated optical signal.

[0010] In the above scheme, the photodetector is a high-sensitivity PMT detector, which converts the filtered optical signal into an electrical signal; the secondary transimpedance amplifier converts the electrical signal into a voltage signal.

[0011] In the above scheme, the high-speed analog-to-digital converter converts the voltage signal into an analog digital signal.

[0012] In the above scheme, the core processor detects the analog digital signal and restores it to target data; wherein the preset pulse number threshold of the analog digital signal is stored in the core processor.

[0013] In the above solution, the visualization device includes an LCD panel and a visualization interaction interface, and transmits the target data to the visualization interaction interface to display the target data.

[0014] In the above scheme, the core processor detects the analog digital signal and restores it to target data, including: when the number of pulses of the analog digital signal is less than the preset pulse number threshold, a pulse detection method is used; when the number of pulses of the analog digital signal is greater than the preset pulse number threshold, a waveform detection method is used.

[0015] In the above scheme, the preset pulse number threshold is obtained through the following conditions, including: when the signal is weak, a pulse detection method is used to gradually increase the signal until the number of pulses in the signal decreases instead of increasing, and the pulse number threshold at this time is determined.

[0016] In the above scheme, after the detection is completed, the analog digital signal is subjected to signal synchronization processing, and data decoding is performed to obtain the target data.

[0017] (III) Beneficial effects

[0018] The technical solution of the embodiment of the present invention has at least the following beneficial effects:

[0019] (1) The communication system is highly integrated, suitable for multiple locations, and commercially portable.

[0020] (2) The communication system adopts a transmission and filter combination structure, which greatly improves the utilization rate of signal light.

[0021] (3) The communication system adaptively switches the receiving end detection mode, which solves the problem that the ultraviolet light signal is seriously affected by the change of the received signal strength, and effectively ensures the stability of the signal after the ultraviolet light communication link is established. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The structure of a communication system based on ultraviolet light intensity adaptation according to an embodiment of the present invention is schematically shown.

[0023] [Explanation of Reference Numerals]

[0024] 1-data acquisition device; 2-modulation circuit; 3-ultraviolet LED array;

[0025] 4-lens assembly; 5-photodetector; 6-secondary transimpedance amplifier;

[0026] 7-high-speed analog-to-digital converter; 8-core processor; 9-visualization device; DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] Please refer to Figure 1 , Figure 1 The structure of a communication system based on ultraviolet light intensity adaptation according to an embodiment of the present invention is schematically shown.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a communication system based on ultraviolet light intensity adaptation, which is composed of a transmitting end and a receiving end.

[0030] In this embodiment, the transmitting end collects the communication data information and converts it into a digital signal, which is modulated and output as an optical signal; the receiving end converts the optical signal into an electrical signal and amplifies it into a voltage signal, which is then converted into an analog digital signal; the analog digital signal is then restored to the target data and displayed.

[0031] The transmitting end includes a data acquisition device 1, a modulation circuit 2 and an ultraviolet LED array 3 in sequence; wherein the ultraviolet LED array 3 adopts a honeycomb structure. The receiving end includes a lens assembly (4), a photodetector 5, a secondary transimpedance amplifier 6, a high-speed analog-to-digital converter 7, a core processor 8 and a visualization device 9 in sequence.

[0032] Among them, in the communication mode of this communication system, when transmitting is selected, reception cannot be performed, but transmission can be performed when receiving is selected, so that the transmitting end and the receiving end can be integrated together without interfering with each other.

[0033] Specifically, the main design of this solution includes the ultraviolet LED array and its driving circuit. The LED adopts a highly integrated honeycomb structure, which effectively increases the heat dissipation efficiency while improving the power and integration of the transmitting end.

[0034] The lens assembly 4 includes a lens and a filter assembly. The lens assembly 4 is placed in front of the photodetector 5 to filter the modulated optical signal to increase the number of received photons and thus increase the utilization rate of the signal light.

[0035] Among them, the photodetector 5 is a high-sensitivity PMT detector, which converts the filtered light signal into an electrical signal; the weak current signal detected by the PMT detector is converted into a voltage signal through a secondary transimpedance amplifier 6, and then converted into an analog digital signal through a high-speed analog-to-digital converter 7.

[0036] It should be noted that after being converted into analog digital signals, they are connected to the core processor 8. The model of the core processor 8 is ZYNQ, and the core board adopts the ZYNQ7000 series of Xilinx Company, model XC7Z010-1CLG400I.

[0037] In this embodiment, the core processor 8 detects the analog digital signal and restores it to target data; wherein the preset pulse number threshold of the analog digital signal is stored in the core processor 8 .

[0038] Specifically, in this embodiment, the preset pulse number threshold is obtained through the following conditions, including: when the signal is weak, a pulse detection method is used to gradually increase the signal until the number of pulses in the signal decreases instead of increasing, and the pulse number threshold at this time is determined.

[0039] For example, the transmitter sends out a test code sequence of 101010, and the receiver observes the number of pulses counted when sending "1". The average of several measurements is threshold 1. When the light intensity is increased, it is observed that the pulses received by the photodetector gradually become denser and tend to be continuous, or the number of pulses of "1" counted in each symbol changes from large to small. The critical approximate value at this time is threshold 2.

[0040] When the received signal light is weak, the pulses of the entire data frame are relatively scattered. The pulse detection pulses when sending the signal "0" and "1" are counted respectively, and the average is calculated by multiple tests to find the threshold of the number of pulses of the "01" signal, and then the analog digital signal can be binarized into the digital signal "01". Then, the number of pulses in each symbol can be counted according to the obtained pulse number threshold to complete signal recovery.

[0041] In this embodiment, the core processor 8 detects the analog digital signal and restores it to target data, including: when the number of pulses of the analog digital signal is less than a preset pulse number threshold, a pulse detection method is used; when the number of pulses of the analog digital signal is greater than a preset pulse number threshold, a waveform detection method is used.

[0042] Specifically, the communication system based on the adaptive ultraviolet light intensity adaptively switches the detection mode of the receiving end to pulse detection or waveform detection according to the number of pulses in each symbol. When the number of pulses is less than the preset pulse number threshold, the pulse detection method is used; when the number of pulses is greater than the preset pulse number threshold, the waveform detection method is used.

[0043] When the received signal light is strong and the pulse signal in each symbol is almost continuous, the bit error rate will increase if pulse detection is used. At this time, pulse detection is no longer applicable and waveform detection is used instead.

[0044] For example, the receiving end converts the signal into an analog digital signal through an analog-to-digital converter, judges the data exceeding the given threshold 1 as "1", otherwise judges it as "0", and then counts the number of "1"s in each symbol. When the number of "1"s in each symbol exceeds the threshold 2, waveform detection is used. When the number of "1"s in each symbol is lower than the threshold 2, pulse detection is used.

[0045] In this embodiment, after the detection is completed, the analog digital signal is subjected to signal synchronization processing, and data decoding is performed to obtain the target data.

[0046] In this embodiment, the visualization device 9 includes an LCD panel and a visualization interaction interface, and transmits the target data to the visualization interaction interface to display the target data.

[0047] For example, data may be displayed by a display, a speaker, etc. depending on the target data.

[0048] In summary, the communication system based on ultraviolet light intensity adaptation provided by the present invention solves the problem that the signal light received by the receiving end during ultraviolet light communication is sometimes strong and sometimes weak, which is extremely unstable, thereby increasing the bit error rate of the receiving end and preventing data from being transmitted normally. The present invention detects the number of pulses and adaptively selects whether the receiving end uses pulse detection or waveform detection, thereby effectively avoiding data errors caused by the instability of the number of pulses at the receiving end due to environmental, weather and other factors. The ultraviolet light communication performance is enhanced, and at the same time, the purpose of automatically adjusting the detection end of the ultraviolet communication receiver is achieved, without the need for complex means such as manually modifying the transmitter light intensity power and improving the efficiency of the receiving end, so that the system is highly integrated and the data performance is improved.

[0049] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0050] It will be appreciated by those skilled in the art that, although the present invention has been shown and described with reference to specific exemplary embodiments of the present invention, it will be appreciated by those skilled in the art that, without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents, various changes in form and detail may be made to the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

[0051] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various disclosed aspects, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: that the claimed invention requires more features than the features explicitly recited in each claim. More specifically, as reflected in the preceding claims, the disclosed aspects are less than all the features of the single embodiment disclosed previously. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present invention.

[0052] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A communication system based on ultraviolet light intensity adaptation, consisting of a transmitting end and a receiving end, characterized in that: The transmitting end collects the communication data information and converts it into a digital signal, which is modulated and output as an optical signal; The receiving end converts the optical signal into an electrical signal and amplifies it into a voltage signal, and then converts it into an analog digital signal; then the analog digital signal is restored to the target data and displayed.

2. The communication system according to claim 1, characterized in that The transmitting end comprises a data acquisition device (1), a modulation circuit (2) and an ultraviolet LED array (3) in sequence; wherein the ultraviolet LED array (3) adopts a honeycomb structure.

3. The communication system according to claim 1, characterized in that: The receiving end comprises in sequence a lens assembly (4), a photodetector (5), a two-stage transimpedance amplifier (6), a high-speed analog-to-digital converter (7), a core processor (8) and a visualization device (9).

4. The communication system according to claim 3, characterized in that: The lens assembly (4) comprises a lens and a filter assembly, and filters the modulated optical signal.

5. The communication system according to claim 3, characterized in that: The photoelectric detector (5) is a high-sensitivity PMT detector, which converts the filtered optical signal into an electrical signal; the secondary transimpedance amplifier (6) converts the electrical signal into a voltage signal.

6. The communication system according to claim 3, characterized in that: The high-speed analog-to-digital converter (7) converts the voltage signal into an analog-to-digital signal.

7. The communication system according to claim 6, characterized in that: The core processor (8) detects the analog digital signal and restores it into target data; wherein the preset pulse number threshold of the analog digital signal is stored in the core processor (8).

8. The communication system according to claim 3, characterized in that: The visualization device (9) comprises an LCD panel and a visualization interaction interface, and transmits the target data to the visualization interaction interface to display the target data.

9. The communication system according to claim 7, characterized in that: The core processor (8) detects the analog digital signal and restores it to target data, including: Under the condition that the number of pulses of the analog digital signal is less than the preset pulse number threshold, a pulse detection method is adopted; Under the condition that the pulse number of the analog digital signal is greater than the preset pulse number threshold, a waveform detection method is adopted.

10. The communication system according to claim 7, characterized in that: The preset pulse number threshold is obtained by the following conditions, including: When the signal is weak, a pulse detection method is used to gradually increase the signal until the number of pulses in the signal decreases instead of increasing, and the pulse number threshold at this time is determined.

11. The communication system according to claim 7, characterized in that: After the detection is completed, the analog digital signal is subjected to signal synchronization processing, and data decoding is performed to obtain target data.

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