CN117554299B - Visible light communication water quality monitoring method - Google Patents
Visible light communication water quality monitoring method Download PDFInfo
- Publication number
- CN117554299B CN117554299B CN202410029312.9A CN202410029312A CN117554299B CN 117554299 B CN117554299 B CN 117554299B CN 202410029312 A CN202410029312 A CN 202410029312A CN 117554299 B CN117554299 B CN 117554299B
- Authority
- CN
- China
- Prior art keywords
- water quality
- signal
- water
- grade
- coefficient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 238000004891 communication Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 238000005286 illumination Methods 0.000 claims abstract description 6
- 230000008054 signal transmission Effects 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 17
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a visible light communication water quality monitoring method, which comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit are respectively positioned at two sides of a water body to be detected, the transmitting unit is used for transmitting signals, the receiving unit is used for receiving signals, and the method also comprises the steps of signal transmission, signal conversion, signal decoding and comparison to determine the water quality grade. According to the invention, the optical channel gain of the water body to be detected is calculated, and then the optical channel gain is compared with the preset water body quality coefficients of 10 grades of water quality, so that the water quality of the water body to be detected is rapidly obtained, the turbidity degree of the water body of the mining pool is monitored, meanwhile, the noise reduction mode is adopted to improve the monitoring precision and reliability, and the interference of factors such as environmental illumination to a system can be remarkably reduced.
Description
Technical Field
The invention relates to the field of water quality detection, in particular to a visible light communication water quality monitoring method.
Background
Places such as iron ore mining ponds have stricter requirements on water quality monitoring, and common scenes are that the turbidity degree of water bodies at different depths is counted, and early warning is carried out when the turbidity degree is abnormal. Common methods based on PH meters, conductivity meters or chemical analysis cannot realize rapid and accurate measurement of the turbidity degree of the water body of the mining pool. The visible light communication is a novel communication mode, and the visible light communication signal is used for water quality monitoring, so that a rapid water quality monitoring function can be realized while an underwater wireless communication link is provided.
Disclosure of Invention
In order to solve the technical problems, the invention provides a visible light communication water quality monitoring method.
The invention provides a visible light communication water quality monitoring method, which comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit are respectively positioned at two sides of a water body to be detected, the transmitting unit is used for transmitting signals, the receiving unit is used for receiving signals, and the method further comprises the following steps:
s1, signal transmission, wherein the transmission unit encodes and modulates signals, and the signals are transmitted from LEDs in the form of optical signals through an LED driving circuit;
s2, signal conversion, wherein the receiving unit receives a signal passing through a water body to be detected, firstly, samples an original signal to obtain original data, and divides the original data into high and low levels according to a specific threshold value to be converted into binary data; performing Fourier transform on the binary data to extract the direct current component intensity and the alternating current component intensity of the binary data; adding the alternating current component strength and the direct current component strength to obtain a median value of the signal variation range under the current water quality channel;
s3, signal decoding, namely decoding the binary data after removing the frame header, namely acquiring an original signal transmitted by a transmitting unit, so as to realize visible light communication;
s4, comparing and determining the water quality grade, calculating the light channel gain of the water body to be detected, which is obtained by calculating the alternating current signal intensity after Fourier expansion of the original data and the signal intensity before entering the water body to be detected, sent by the transmitting unit, and comparing the light channel gain with the preset water quality grade to obtain the water quality grade of the water body to be detected. The water body calculates the formula for the light channel gain:
in the aboveGain for the light channel of the water body;
for receiving signal power;
for the transmit signal power;
is the receiving end area;
is the distance between the transmitting end and the receiving end.
Preferably, the direct current component includes a direct current component of a signal transmitted by the transmitting unit and a part of ambient direct current illumination noise, and the alternating current signal is an alternating current component of the signal transmitted by the transmitting unit.
Preferably, the preset water quality grades are 10 grades, and are divided according to the water quality coefficients:
the water mass coefficient is
In the abovePure water environment is to light channel gain->For the current measurement of the channel gain,
the water quality coefficient k is 90-100%, and the water quality is 1 grade of pure grade water quality;
the water quality coefficient k is 80-90%, and the water quality is the quality of the purified water with the superior grade 2;
the water quality coefficient k is 70-80%, and the water quality is 3 grade;
the water quality coefficient k is 60-70%, and the water quality is 4 grade;
the water quality coefficient k is 50-60%, and the water quality is 5 grade;
the water quality coefficient k is 40-50%, and the water quality is 6 grade;
the water quality coefficient k is 30-40%, and the water quality is 7 grade;
the water quality coefficient k is 20-30%, and the water quality is 8-level;
the water quality coefficient k is 10-20%, and the water quality is 9 grade;
the water quality is 10 grade when the water quality coefficient k is below 10%,
the above numerical section is a left open-right closed section.
Preferably, the encoding adopts Manchester encoding or 4B6B encoding, and the decoding is Manchester decoding or 4B6B decoding.
Preferably, the modulation is OOK (On-Off Keying) or VPPM.
Preferably, the sampling rate of the sampling is 100KHz, the sampling window uses a cyclic array, and the length is 1024bits.
Preferably, the signal is amplified before being converted, and then digital filtering processing is performed.
The invention has the beneficial effects that:
according to the visible light communication water quality monitoring method, when the method is used, a water body to be detected is located between the transmitting unit and the receiving unit, the transmitting unit encodes and modulates data and transmits the data through the LED at a specific frequency, and the receiving unit receives an optical signal from the transmitting unit and amplifies, filters and demodulates an original signal to realize visible light wireless communication. Meanwhile, the receiving unit calculates the filtered signal intensity to determine the attenuation action intensity of the water body to be detected between the transmitting unit and the receiving unit on visible light, and further obtain the water quality information to be detected. The invention can monitor the turbidity degree of the water body of the mining pool, and meanwhile, the noise reduction mode is adopted to improve the monitoring precision and reliability, and the interference of factors such as environmental illumination and the like on the system can be obviously reduced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram of a system architecture of a method for monitoring water quality in visible light communication according to the present invention;
FIG. 2 is a schematic diagram of Manchester encoding of a method for monitoring water quality in visible light communication according to the present invention;
FIG. 3 is a schematic diagram of a data frame format of a visible light communication water quality monitoring method according to the present invention;
FIG. 4 is a schematic diagram of an idle frame structure of a visible light communication water quality monitoring method according to the present invention;
fig. 5 is a schematic diagram of a flicker mode of an emitting unit LED of the visible light communication water quality monitoring method according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Referring to fig. 1-5, the visible light communication water quality monitoring method of the invention comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit are respectively positioned at two sides of a water body to be detected, the transmitting unit is used for transmitting signals, the receiving unit is used for receiving signals, and the method further comprises the following steps:
s1, signal transmission, wherein a transmitting unit encodes and modulates signals, and the signals are transmitted from LEDs in the form of optical signals through an LED driving circuit;
s2, signal conversion, wherein a receiving unit receives a signal passing through a water body to be detected, firstly, the original signal is sampled to obtain original data, and the original data is divided into high and low levels according to a specific threshold value and is converted into binary data; performing Fourier transform on the binary data to extract the direct current component intensity and the alternating current component intensity of the binary data; adding the alternating current component strength and the direct current component strength to obtain a median value of the signal variation range under the current water quality channel;
s3, signal decoding, namely decoding binary data after removing frame heads, namely acquiring original signals transmitted by a transmitting unit, so as to realize visible light communication;
s4, comparing and determining the water quality grade, calculating the light channel gain of the water body to be detected, which is obtained by calculating the alternating current signal intensity after Fourier expansion of the original data and the signal intensity before entering the water body to be detected, sent by the transmitting unit, and comparing the light channel gain with the preset water quality grade to obtain the water quality grade of the water body to be detected. The water body calculates the formula for the light channel gain:
in the aboveGain for the light channel of the water body;
for receiving signal power;
for the transmit signal power;
is the receiving end area;
is the distance between the transmitting end and the receiving end.
The attenuation action intensity of the water body to be measured between the transmitting unit and the receiving unit on the visible light is determined through the method, so that the water quality information to be measured is obtained, the operation is simple and convenient, and the reliability is high.
Preferably, the direct current component includes a direct current component of a signal transmitted by the transmitting unit and a part of ambient direct current illumination noise, the alternating current signal is an alternating current component of the signal transmitted by the transmitting unit, and the preset water quality level is divided according to the water quality coefficient:
the water mass coefficient is
In the abovePure water environment is to light channel gain->Channel gain is currently measured.
When the water quality coefficient k is 90% -100%, the water quality is 1 grade of pure grade water quality;
the water quality coefficient k is 80-90%, and the water quality is the quality of the purified water with the superior grade 2;
the water quality coefficient k is 70-80%, and the water quality is 3 grade;
the water quality coefficient k is 60-70%, and the water quality is 4 grade;
the water quality coefficient k is 50-60%, and the water quality is 5 grade;
the water quality coefficient k is 40-50%, and the water quality is 6 grade;
the water quality coefficient k is 30-40%, and the water quality is 7 grade;
the water quality coefficient k is 20-30%, and the water quality is 8-level;
the water quality coefficient k is 10-20%, and the water quality is 9 grade;
the water quality is 10 level when the water quality coefficient k is below 10%, and the above digital interval is left open and right closed interval. And the water quality grade to be measured is rapidly obtained by comparing the preset water quality grade information with the water quality information to be measured.
The encoding adopts Manchester encoding or 4B6B encoding, decoding is Manchester decoding or 4B6B decoding, modulating into OOK or VPPM, sampling rate of sampling is 100KHz, a sampling window uses a cyclic array, and length is 1024bits; before signal conversion, the signal is amplified, then digital filtering processing is carried out, environmental interference is eliminated, the diversity of sampling samples is improved, and the reliability of detection data is further improved.
At the transmitting unit, the raw data is first manchester encoded to achieve binary conversion and dc component cancellation. The data signal spectrum after Manchester encoding is more concentrated, and the subsequent digital filtering processing of the signal is facilitated. The manchester encoding table is shown in figure 2. And then, adding a frame header to the data according to a protocol required by communication, and packaging the data into a data frame. The data frame format is schematically shown in fig. 3, the frame header length is 3 bits, and the data segment length is 8 bits. The data frame is OOK (On-Off Keying) modulated and transmitted using the LED driver circuit at a symbol rate of 10K symbols/s. The modulated signals are transmitted by controlling the on and off states of the LEDs, so that the digital signal modulation of visible light is realized.
Under the condition of no communication data, the sending end can select to turn off the LED to save energy or transmit an idle frame to measure the water quality according to whether the water quality is required to be measured. The idle frame structure as shown in fig. 4, the receiving unit distinguishes the data frame from the idle frame by whether or not the preamble frame header is included. The transmission mode of the transmitting unit after the idle frame is added is shown in fig. 5, and the proportion of the data to the idle frame may be different according to the data amount generated by the specific transmitting unit.
The light signal emitted by the LED reaches the receiving unit after passing through the water channel to be detected. The receiving unit first samples the original signal to obtain the original data. The sampling rate is typically set to 100KHz samples, and the sampling window uses a cyclic array, 1024bits long. After each round of sampling is completed, the receiving unit needs to divide the original light intensity signal into high and low levels according to a specific threshold value so as to convert the original signal into binary data.
Because the underwater open environment channel is uncontrollable, the channel gain is highly related to the water quality to be measured, in order to accurately divide the threshold value of the signal and measure the water quality at the same time, a dynamic threshold value scheme based on the level of the measured water quality is adopted. After each round of sampling is completed, the receiving unit performs fourier transform on the data in the sampling window. Because the transmitting unit adopts Manchester coding mode and OOK modulation, the signal frequency spectrum of the receiving unit is concentrated, the frequency of the transmitted signal is known, and after Fourier transformation, the direct current component strength and alternating current signal strength of the signal can be extracted. The direct current component comprises a signal direct current component transmitted by the transmitter and partial environment direct current illumination noise, and the alternating current signal is an alternating current component of a signal transmitted by the transmitter. After the conversion is completed, the receiving unit extracts the frequency intensity peak value of the signal to obtain the average power of the signal. And adding the frequency domain alternating current component strength and the direct current component strength to obtain a median value of the signal variation range under the current water quality channel, thereby realizing dynamic thresholds under different water qualities. The original signal can then be divided into binary data according to the threshold. And removing the frame head from the data, and performing Manchester decoding, namely acquiring the original data transmitted by the transmitting unit, so as to realize visible light communication. Meanwhile, the light signals transmitted by the transmitting unit are received by the receiving unit after being taken as channels through the water body to be measured, so that the intensity of the alternating current signals after Fourier expansion uniquely corresponds to the water quality, and the water quality can be graded according to requirements. Taking 10 water quality grades as an example, assuming that the signal intensity grade before the water entering of the receiver is 100%, the signal intensity grade is 100% -90% of the pure water quality grade 1, and 90% -80% of the high-quality water quality grade 2, so that the water quality can be rapidly judged and graded while the underwater visible light communication is realized.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A visible light communication water quality monitoring method is characterized in that an underwater wireless communication link is adopted to realize a rapid water quality monitoring function, and water quality is rapidly judged and graded while underwater visible light communication is carried out;
the underwater wireless communication link comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit are respectively positioned at two sides of a water body to be detected, the transmitting unit is used for transmitting signals, and the receiving unit is used for receiving signals;
the method comprises the following steps:
s1, signal transmission, wherein the transmission unit carries out Manchester coding on signals to realize binary conversion and direct current component elimination, and then adds frame heads into data according to a protocol required by communication, and encapsulates the data into data frames; after the data frame is subjected to OOK modulation, an LED driving circuit is used for transmitting signals from the LEDs in the form of optical signals, and the modulated signals are transmitted by controlling the on and off states of the LEDs;
under the condition of no communication data, the transmitting unit can select to turn off the LED to save energy or transmit the idle frame to measure the water quality according to the need of water quality measurement, and the receiving unit distinguishes the data frame from the idle frame by whether the preamble frame head is included or not;
s2, signal conversion, wherein the receiving unit receives a signal passing through a water body to be detected, firstly, the original signal is sampled to obtain original data, the sampling rate of the sampling is 100KHz, a sampling window uses a cyclic array, and the length is 1024bits;
after each round of sampling is completed, the receiving unit performs Fourier transform on the data in the sampling window, and extracts the direct current component strength and alternating current component strength of the signal, wherein the direct current component comprises the direct current component of the signal transmitted by the transmitting unit and partial environment direct current illumination noise, and the alternating current signal is the alternating current component of the signal transmitted by the transmitting unit; adding the alternating current component intensity and the direct current component intensity to obtain a median value of a signal variation range under a current water quality channel, so as to obtain dynamic thresholds under different water qualities, and dividing an original signal into binary data according to the thresholds;
s3, signal decoding, namely Manchester decoding is carried out after the frame head of the binary data is removed, and an original signal transmitted by a transmitting unit is obtained, so that visible light communication is realized;
s4, comparing and determining the water quality grade, calculating the channel gain of the water body to be detected on the light according to the alternating current signal intensity after Fourier expansion of the original data and the signal intensity before entering the water body to be detected, which is sent out by the transmitting unit, and then obtaining the water quality grade of the water body to be detected according to the water quality coefficient; wherein, the water body calculates the formula to the light channel gain:
in the aboveGain for the light channel of the water body;
for receiving signal power;
for the transmit signal power;
is the receiving end area;
the distance between the transmitting end and the receiving end is set;
the calculation formula of the water mass coefficient is as follows:
in the aboveGain of the optical channel for pure water environment, +.>Channel gain is currently measured.
2. The method for monitoring the water quality of visible light communication according to claim 1, wherein the preset water quality level is 10 levels, and the water quality levels are divided according to the water quality coefficient:
the water quality coefficient k is 90-100%, and the water quality is 1 grade of pure grade water quality;
the water quality coefficient k is 80-90%, and the water quality is the quality of the purified water with the superior grade 2;
the water quality coefficient k is 70-80%, and the water quality is 3 grade;
the water quality coefficient k is 60-70%, and the water quality is 4 grade;
the water quality coefficient k is 50-60%, and the water quality is 5 grade;
the water quality coefficient k is 40-50%, and the water quality is 6 grade;
the water quality coefficient k is 30-40%, and the water quality is 7 grade;
the water quality coefficient k is 20-30%, and the water quality is 8-level;
the water quality coefficient k is 10-20%, and the water quality is 9 grade;
the water quality is 10 level when the water quality coefficient k is below 10%, and the above digital interval is left open and right closed interval.
3. The method for monitoring the water quality of visible light communication according to claim 1, wherein the signal is amplified before being converted, and then is subjected to digital filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410029312.9A CN117554299B (en) | 2024-01-09 | 2024-01-09 | Visible light communication water quality monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410029312.9A CN117554299B (en) | 2024-01-09 | 2024-01-09 | Visible light communication water quality monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117554299A CN117554299A (en) | 2024-02-13 |
| CN117554299B true CN117554299B (en) | 2024-03-29 |
Family
ID=89823467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410029312.9A Active CN117554299B (en) | 2024-01-09 | 2024-01-09 | Visible light communication water quality monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117554299B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6697311B1 (en) * | 1998-11-20 | 2004-02-24 | Lg Electronics Inc. | Method and apparatus for modulating and demodulating data |
| CN107276670A (en) * | 2017-05-02 | 2017-10-20 | 南京邮电大学 | A kind of intelligent visible light communication system of environmental monitoring and method |
| CN206573567U (en) * | 2017-03-30 | 2017-10-20 | 周朝晖 | A kind of real-time water monitoring device applied based on LI FI |
| CN108400817A (en) * | 2018-03-19 | 2018-08-14 | 西安电子科技大学 | A kind of visible light communication method for transmitting Manchester's code based on serial ports |
| CN110166120A (en) * | 2019-04-08 | 2019-08-23 | 中山大学 | The two-way visible light communication system of intelligence suitable for multiple-quality water |
| CN115102616A (en) * | 2022-05-29 | 2022-09-23 | 复旦大学 | Underwater wireless green light communication transmission system based on plastic optical fiber extension communication link |
-
2024
- 2024-01-09 CN CN202410029312.9A patent/CN117554299B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6697311B1 (en) * | 1998-11-20 | 2004-02-24 | Lg Electronics Inc. | Method and apparatus for modulating and demodulating data |
| CN206573567U (en) * | 2017-03-30 | 2017-10-20 | 周朝晖 | A kind of real-time water monitoring device applied based on LI FI |
| CN107276670A (en) * | 2017-05-02 | 2017-10-20 | 南京邮电大学 | A kind of intelligent visible light communication system of environmental monitoring and method |
| CN108400817A (en) * | 2018-03-19 | 2018-08-14 | 西安电子科技大学 | A kind of visible light communication method for transmitting Manchester's code based on serial ports |
| CN110166120A (en) * | 2019-04-08 | 2019-08-23 | 中山大学 | The two-way visible light communication system of intelligence suitable for multiple-quality water |
| CN115102616A (en) * | 2022-05-29 | 2022-09-23 | 复旦大学 | Underwater wireless green light communication transmission system based on plastic optical fiber extension communication link |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117554299A (en) | 2024-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104485993B (en) | Vehicular visible light wireless digital voice communication system | |
| CN102098112A (en) | Method and system for underwater short-distance data communication through light-emitting diode (LED) light source | |
| CN107968757B (en) | Demodulation method and system for frequency shift keying modulation signal | |
| EP0944201A3 (en) | System and method for measuring channel quality in a communication system | |
| CN105871506B (en) | Wirelessly communicate adaptive transmission method | |
| CN103825656A (en) | Visible light communication system based on TCP/IP and method | |
| TWI371171B (en) | Method and apparatus for selective disregard of co-channel transmissions on a medium | |
| CN106130595A (en) | A kind of marine ultrashort wave beyond-the-horizon communication device | |
| CN106130660A (en) | A kind of method of wireless light communication blind Detecting receiver | |
| CN107888295A (en) | A kind of dim light communication control processor and communication means based on photon counting | |
| CN105071856A (en) | LED visible light communication system based on OFDM | |
| CN117554299B (en) | Visible light communication water quality monitoring method | |
| CN103905116A (en) | Infrared LED wireless audio sending device, receiving device and transmitting system | |
| CN113114376A (en) | Optical module of top-modulated signal based on phase modulation and communication method | |
| CN114866142A (en) | Dense wavelength division multiplexing free space optical communication system and method adopting bipolar coding | |
| CN113300793A (en) | Data transmission signal detection system based on block chain and Internet of things | |
| CN102916736B (en) | The radio monitoring method and apparatus of wireless communication system | |
| CN108494484B (en) | Working method of indoor VLC (visible light communication) spatial modulation system based on IHDAF (Internet short message interface) protocol | |
| CN108282226A (en) | A kind of synchronous method applied to photon counting visible light communication system | |
| CN116155378A (en) | Wireless audio communication system based on visible light | |
| CN113300775B (en) | Signal transmitting apparatus, control method of signal transmitting apparatus, and optical communication device | |
| Tettey et al. | Implementation of software-defined adaptive DCO-OFDM for vehicular visible light communication | |
| CN102970069A (en) | Ultraviolet light diversity reception system and method | |
| CN114172574B (en) | Modulation method combining non-orthogonal multiple access technology with pulse amplitude modulation technology | |
| CN106789799B (en) | Incoherent BPSK receiving method suitable for IEEE802.15.4 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |