CN114362836A - LED/LD array based transmitting-receiving integrated underwater wireless blue-green light communication system and method - Google Patents

Abstract

The invention provides an underwater wireless blue-green light communication system and method based on an LED/LD array transceiving integration, and solves the problems that an existing underwater mobile platform is low in alignment precision and easy to shake, and turbid seawater, dust and benthos cause loss or shielding of transmission signal light. The system comprises two pressure-resistant sealed cabins and two communication devices; each communication device comprises a transmitting unit, a signal processor and a receiving unit which are arranged in the pressure-resistant sealed cabin; the transmitting unit comprises a signal synchronization module, an adjustable voltage amplification module, a parallel driver, a parallel bias current driving module and M groups of LED/LD serial modules; the receiving unit comprises a signal sampling module, a signal filtering module, a signal amplifying module, a photoelectric detector and a receiving lens; the two communication devices are oppositely arranged, wherein M paths of LED/LD signals synchronously output by the M groups of LED/LD serial modules of one communication device are transmitted to a receiving lens of the other communication device through a channel.

Description

Integrated underwater wireless blue-green light communication system and method based on LED/LD array transceiver

technical field

The invention belongs to the technical field of underwater wireless communication, and in particular relates to an integrated underwater wireless blue-green light communication system and method based on an LED/LD array transceiver.

Background technique

In recent years, laser has been widely used in space scientific research due to its advantages of good directionality, good monochromaticity, good coherence, large amount of information transmission, and not easy to be affected by electromagnetic interference. With the development of underwater detection technology, the amount of data is increasing day by day, which puts forward higher requirements for underwater high-speed communication. Underwater wireless optical communication has the characteristics of high bandwidth, low power consumption, and low delay, which can meet the needs of underwater high-speed communication.

The 450nm-580nm blue-green light band in the visible light band has little attenuation of the transmission signal intensity underwater. Therefore, it is necessary to deeply study the transmission characteristics of the blue-green light band in the underwater and the atmosphere. However, the existing underwater mobile platforms have low alignment accuracy and easy shaking, as well as turbid seawater, dust and other seabed organisms caused during seabed exploration or construction, which will cause great loss or complete blockage of the transmitted signal light. Limit the further application and promotion of wireless optical communication equipment underwater.

SUMMARY OF THE INVENTION

In order to solve the technical problems that the existing underwater mobile platform has low alignment accuracy and easy shaking, turbid seawater, dust and seabed organisms cause loss or occlusion of the transmitted signal light, and affect the establishment and maintenance of communication, the present invention provides an LED-based technology. /LD array transceiver integrated underwater wireless blue-green optical communication system and method.

For achieving the above object, the technical scheme provided by the present invention is:

An integrated underwater wireless blue-green light communication system based on LED/LD array transceiver, which is special in that it includes two pressure-resistant sealed cabins and two communication devices respectively arranged in the two pressure-resistant sealed cabins;

Each of the communication devices includes a transmitting unit, a signal processor and a receiving unit arranged in the pressure-resistant sealed cabin;

The transmitting unit includes M adjustable voltage amplification modules, M parallel drivers, 1 signal synchronization module, M parallel bias current driving modules and M groups of LED/LD series modules, where M is an integer and 3≤M ≤9;

The outputs of the signal processor are respectively connected with the inputs of the M adjustable voltage amplifying modules, the outputs of the M adjustable voltage amplifying modules are respectively connected with the inputs of the M parallel drivers, and the outputs of the M parallel drivers are respectively connected through the signal synchronization module. connected with the inputs of the M parallel bias current driving modules, and the outputs of the M parallel bias current driving modules are respectively connected with the inputs of the M groups of LED/LD series modules;

The receiving unit includes a signal sampling module, a signal filtering module, a signal amplifying module, a photodetector and a receiving lens; the photodetector is located at the focal position of the beam of the receiving lens, and a filter component is arranged on the optical path between the two; The output of the detector is connected with the input of the signal processor through the signal amplification module, the signal filtering module and the signal sampling module arranged in sequence;

The pressure-resistant sealed cabin is provided with a glass window, and the glass window is an arc-shaped structure that is convex to the outside. common optical axis;

Alternatively, both the light source board and the receiving lens of the M group LED/LD series module are arranged on the pressure-resistant sealed cabin, and the position where the light source board or the receiving lens is installed on the pressure-resistant sealed cabin is an arc-shaped structure that is convex to the outside, and the light source board and The photodetectors share the same optical axis;

The two communication devices are arranged opposite to the outwardly convex arc structure, and M LED/LD signals synchronously output by M groups of LED/LD series modules of one communication device are transmitted to the receiving lens of the other communication device through the channel.

Further, the filter assembly includes a dichroic filter and a color filter arranged in sequence along the optical path, and the dichroic filter is arranged close to the photodetector.

Further, the photodetector adopts a large area array photodetector.

Further, the receiving lens is a square convex lens facing away from the color filter.

Further, the M is 6.

Further, the M groups of LED/LD series modules are arranged on the same plane circuit light source board.

Further, the glass window is a hemispherical transparent sealing window.

At the same time, based on the above-mentioned integrated underwater wireless blue-green light communication system based on LED/LD array transceiver, the present invention also provides an integrated underwater wireless blue-green light communication method based on LED/LD array transceiver, including the following steps:

1.1) The signal processor of one of the communication devices sends M digital synchronization signals;

1.2) After the M channels of digital synchronization signals are amplified by the M adjustable voltage amplifying modules, they are sent to the M parallel drivers. After the multi-channel synchronization of the signal synchronization module, they are sent to the M parallel bias current driving modules. The piezoelectric current drive module drives M groups of LED/LD series modules, so that the working voltage of each LED/LD is within the linear range, and modulates the digital signal to the optical signal, so that the M groups of LED/LD series modules can output M LEDs synchronously /LD signal;

1.3) The M-channel LED/LD signal is transmitted to the receiving lens of another communication device through the underwater channel, and after the background light and stray light are filtered out by the filter component of the second communication device, it is detected by the photoelectricity of the second communication device. receiver;

1.4) The photodetector converts the received LED/LD signal into an electrical signal, and then enters the signal processor for signal demodulation after amplification by the signal amplification module, noise filtering by the signal filtering module, and high-speed signal sampling by the signal sampling module. processing and communication.

Compared with the prior art, the advantages of the present invention are:

1. Based on the application of LED/LD array synchronous emission and large area array detection, the present invention realizes high-power, large-angle emission and wide-field-of-view reception. Compared with single-point high-power LED/LD and LD emission, it can greatly provide underwater Environmental adaptability and compatibility of optical communication systems in complex marine environments and complex operating conditions.

2. The invention greatly improves the applicable scope of the underwater wireless optical communication system, and always ensures the rapid establishment and stable maintenance of the optical communication link under different environments such as platform shaking, turbid water quality, dust, partial occlusion, etc.

3. Compared with the 360° 4Π space sealing technology applied by the existing underwater optical sensing system, the LED/LD array and the wide field of view receiving technology of the present invention can be combined with it to further effectively improve the emission of underwater optical communication. Angle and receiving field of view, to achieve all-round optical link coverage, and then promote the development of a little more underwater optical communication technology, has broad application prospects and promotion value.

4. The transmitting unit of the present invention is based on the LED/LD array, which can realize high-power transmission, and can simultaneously take into account the functions of underwater lighting, guidance and communication.

5. The system of the present invention is suitable for rapid chain establishment and stable communication in complex underwater environment, and improves the establishment time and stability of underwater wireless optical communication.

Description of drawings

Fig. 1 is the principle structure block diagram of the present invention based on LED/LD array transceiver integrated underwater wireless blue-green light communication system;

2 is a structural block diagram of a first communication apparatus in an embodiment of the present invention;

3 is a structural block diagram of a second communication apparatus in an embodiment of the present invention;

Among them, the reference numerals are as follows:

1- The first communication device, 101- The first dry cabin high pressure and pressure sealed cabin, 110- The first signal processor, 111- The first adjustable voltage amplifying module, 112- The first parallel driver, 113- The second adjustable Voltage amplifier module, 114-second parallel driver, 115-third adjustable voltage amplifier module, 116-third parallel driver, 117-fourth adjustable voltage amplifier module, 118-fourth parallel driver, 119-fifth adjustable voltage amplifier module Voltage regulation amplifier module, 120- the fifth parallel driver, 121- the sixth adjustable voltage amplifier module, 122- the sixth parallel driver, 123- the first signal synchronization module, 124- the first parallel bias current driver module, 125- The first group of LED/LD series modules, 126-the second parallel bias current driver module, 127-the second group of LED/LD series modules, 128-the third parallel bias current driver module, 129-the third group of LED/LD Series module, 130- the fourth parallel bias current drive module, 131- the fourth group of LED/LD series modules, 132- the fifth parallel bias current drive module, 133- the fifth group of LED/LD series modules, 134- the first Six parallel bias current drive modules, 135 - the sixth group of LED/LD series modules, 136 - the first signal sampling module, 137 - the first signal filtering module, 138 - the first signal amplification module, 139 - the first photodetector , 140-first dichroic filter, 141-first color filter, 142-first receiving lens;

2- The second communication device, 201- The second dry cabin high pressure and pressure sealed cabin, 210- The second signal processor, 211- The seventh adjustable voltage amplifier module, 212- The seventh parallel driver, 213- The eighth adjustable Voltage amplifier module, 214-the eighth parallel driver, 215-the ninth adjustable voltage amplifier module, 216-the ninth parallel driver, 217-the tenth adjustable voltage amplifier module, 218-the tenth parallel driver, 219-the eleventh Adjustable voltage amplifier module, 220- the eleventh parallel driver, 221- the twelfth adjustable voltage amplifier module, 222- the twelfth parallel driver, 223- the second signal synchronization module, 224- the seventh parallel bias current driver Module, 225-seventh group LED/LD series module, 226-eighth parallel bias current drive module, 227-eighth group LED/LD series module, 228-ninth parallel bias current drive module, 229-ninth Group LED/LD series module, 230- tenth parallel bias current drive module, 231- tenth group LED/LD series module, 232- eleventh parallel bias current drive module, 233- eleventh group LED/LD Series module, 234- the twelfth parallel bias current drive module, 235- the twelfth group of LED/LD series modules, 236- the second signal sampling module, 237- the second signal filtering module, 238- the second signal amplifying module , 239 - the second photodetector, 240 - the second dichroic filter, 241 - the second color filter, 242 - the second receiving lens.

Detailed ways

The content of the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

First of all, it should be noted that the electronic components (components) used in the first communication device 1 and the second communication device 2 in the present invention are all mature technologies, and all have corresponding commercially available products. On the basis of reading and comprehending the application documents, those skilled in the art can fully reproduce the present invention according to their radio knowledge and various digital signal processing skills.

As shown in FIG. 1 , an underwater wireless blue-green light communication system based on an integrated LED/LD array transceiver of the present invention includes two pressure-resistant sealed cabins and two communication devices respectively arranged in the two pressure-resistant sealed cabins. The device can be fixed on the inner fixing member of the pressure-resistant sealed cabin, or set at the relative position of the glass window on the pressure-resistant sealed cabin wall.

The two sealed cabins are the first dry cabin high pressure and pressure sealed cabin 101 and the second dry cabin high pressure and pressure sealed cabin 201 respectively, and the two communication devices are the first dry cabin high pressure and pressure sealed cabin 101 respectively. The communication device 1 and the second communication device 2 in the high-pressure and pressure-resistant sealed chamber 201 of the second dry cabin, the first communication device 1 and the second communication device 2 have the same structure, and both include a transmitting unit and a receiving unit to realize the first communication. The device 1 and the second communication device 2 have a two-way wireless communication function, and constitute an underwater wireless optical communication system under complex seawater channels and working conditions.

As shown in FIG. 2 , the first communication device 1 includes a first transmitting unit, a first signal processor 110 and a first receiving unit, which are arranged in the high-pressure and pressure-resistant sealed chamber 101 of the first dry cabin; wherein, the first signal processor 110 has at least six output ports for synchronously outputting baseband signals and at least one electrical signal input interface for inputting the same signal. The first signal processor 110 in this embodiment has six output interfaces and one input interface.

The first transmitting unit includes a first adjustable voltage amplifier module 111, a first parallel driver 112, a second adjustable voltage amplifier module 113, a second parallel driver 114, a second adjustable voltage amplifier module 113, a second parallel driver 114, and a Three adjustable voltage amplifier modules 115, third parallel driver 116, fourth adjustable voltage amplifier module 117, fourth parallel driver 118, fifth adjustable voltage amplifier module 119, fifth parallel driver 120, sixth adjustable voltage amplifier Module 121, sixth parallel driver 122, first signal synchronization module 123, first parallel bias current driving module 124, first group of LED/LD series modules 125, second parallel bias current driving module 126, second group of LEDs /LD series module 127, third parallel bias current drive module 128, third group of LED/LD series modules 129, fourth parallel bias current drive module 130, fourth group of LED/LD series modules 131, fifth parallel bias A piezoelectric current driving module 132 , a fifth group of LED/LD series modules 133 , a sixth parallel bias current driving module 134 and a sixth group of LED/LD series modules 135 .

The first output interface of the first signal processor 110 is connected to the first adjustable voltage amplifying module 111, the first parallel driver 112, the first signal synchronization module 123, the first parallel bias current driving module 124, the first group of LED/LD The series modules 125 are connected in sequence; the second output interface of the first signal processor 110 is connected to the second adjustable voltage amplifier module 113, the second parallel driver 114, the first signal synchronization module 123, the second parallel bias current driver module 126, The second group of LED/LD series modules 127 are connected in sequence; the third output interface of the first signal processor 110 is connected to the third adjustable voltage amplifying module 115 , the third parallel driver 116 , the first signal synchronization module 123 , and the third parallel biasing module 115 . The piezoelectric current drive module 128 and the third group of LED/LD series modules 129 are connected in sequence; the fourth output interface of the first signal processor 110 is connected to the fourth adjustable voltage amplifying module 117 , the fourth parallel driver 118 and the first signal synchronization module 123. The fourth parallel bias current driving module 130 and the fourth group of LED/LD series modules 131 are connected in sequence; the fifth output interface of the first signal processor 110 is connected to the fifth adjustable voltage amplifying module 119 and the fifth parallel driver 120 , the first signal synchronization module 123, the fifth parallel bias current drive module 132, and the fifth group of LED/LD series modules 133 are connected in sequence; the sixth output interface of the first signal processor 110 is connected to the sixth adjustable voltage amplifying module 121 , the sixth parallel driver 122 , the first signal synchronization module 123 , the sixth parallel bias current driving module 134 , and the sixth group of LED/LD series modules 135 are connected in sequence.

The first group of LED/LD series modules 125, the second group of LED/LD series modules 127, the third group of LED/LD series modules 129, the fourth group of LED/LD series modules 131, the fifth group of LED/LD series modules 133 and The sixth group of LED/LD series modules 135 can be reasonably arranged on the same plane circuit light source board I. In this embodiment, the wall of the high-pressure and pressure-resistant sealing chamber 101 of the first dry chamber is provided with a glass window that can transmit laser light. Preferably, the glass window is: The hemispherical transparent sealing window; the light source board I is arranged opposite to the glass window of the first dry chamber high-pressure and pressure-resistant sealing chamber 101 . In other embodiments, the light source panel I can be directly embedded on the wall of the first dry chamber high-pressure and pressure-resistant sealed chamber 101 .

The first signal processor 110 is used for digital signal modulation and transmission, signal reception and demodulation processing. The first adjustable voltage amplifying module 111, the second adjustable voltage amplifying module 113, the third adjustable voltage amplifying module 115, the The fourth adjustable voltage amplifying module 117 , the fifth adjustable voltage amplifying module 119 and the sixth adjustable voltage amplifying module 121 are used to amplify the data signals sent by the first signal processor 110 respectively. The second parallel driver 114 , the third parallel driver 116 , the fourth parallel driver 118 , the fifth parallel driver 120 and the sixth parallel driver 122 are used for parallel multi-level current driving for the series LED/LD modules, and the first signal synchronization module 123 uses For the first drive signal output from the first parallel driver 112 , the second drive signal output from the second parallel driver 114 , the third drive signal output from the third parallel driver 116 , and the fourth drive signal output from the fourth parallel driver 118 The first group of LED/LD series modules and the second group of LED/LD series modules are connected in series for synchronous processing. The modules, the third group of LED/LD series modules, the fourth group of LED/LD series modules, the fifth group of LED/LD series modules, and the sixth group of LED/LD series modules are synchronized to output optical signals.

The first receiving unit includes a first signal sampling module 136, a first signal filtering module 137, a first signal amplifying module 138, a first photodetector 139, a first two The dichroic filter 140 , the first color filter 141 and the first receiving lens 142 .

The first photodetector 139, the first signal amplifying module 138, the first signal filtering module 137 and the first signal sampling module 136 are connected in sequence, and the output of the first signal sampling module 136 is connected with the input of the first signal processor 110; A photodetector 139 is arranged opposite to the first receiving lens 142, the first receiving lens 142 is a convex lens, the first photodetector 139 is located at the focal position of the beam of the first receiving lens 142, and the first dichroic is placed in order in the optical path between the two. The filter 140 and the first color filter 141; the first receiving lens 142 is arranged in the cavity of the first dry chamber high pressure and pressure sealing chamber 101, and the first receiving lens 142 is connected to the first dry chamber high pressure and pressure sealing chamber The glass windows of 101 are arranged opposite to each other, and the light source plate I and the first photodetector 139 share the same optical axis.

The transmitting unit and the receiving unit of the first communication device 1 share the first signal processor 110; and the transmitting unit and the receiving unit share a hemispherical transparent sealing window, the LED/LD array light source board is located in the central section of the hemisphere, and the first photodetector 139 is sensitive to light The surface is located at the center of the hemisphere receiving lens; the LED/LD array light source (light source board I) and the first photodetector 139 share the same optical axis.

As shown in FIG. 3 , the second communication device 2 includes a second transmitting unit, a second signal processor and a second receiving unit disposed in the high-pressure and pressure-resistant sealed chamber 201 of the second dry chamber; wherein, the second signal processor 210 There are at least six output ports for synchronously outputting baseband signals and at least one electrical signal input interface for inputting the same signal. The output port of the second signal processor 210 is equal to the output port of the first signal processor 110 . The second signal processor 210 in this embodiment has six output interfaces and one input interface.

The second transmitting unit includes a seventh adjustable voltage amplifier module 211 , a seventh parallel driver 212 , an eighth adjustable voltage amplifier module 213 , an eighth parallel driver 214 , a seventh adjustable voltage amplifier module 213 , an eighth parallel driver 214 , Nine adjustable voltage amplifier modules 215, ninth parallel driver 216, tenth adjustable voltage amplifier module 217, tenth parallel driver 218, eleventh adjustable voltage amplifier module 219, eleventh parallel driver 220, twelfth adjustable voltage amplifier The voltage regulation amplifier module 221, the twelfth parallel driver 222, the second signal synchronization module 223, the seventh parallel bias current driving module 224, the seventh group of LED/LD series modules 225, the eighth parallel bias current driving module 226, The eighth group of LED/LD series modules 227, the ninth group of parallel bias current drive modules 228, the ninth group of LED/LD series modules 229, the tenth group of parallel bias current driver modules 230, the tenth group of LED/LD series modules 231, The eleventh parallel bias current driving module 232 , the eleventh group of LED/LD series modules 233 , the twelfth parallel bias current driving module 234 and the twelfth group of LED/LD series modules 235 .

The first output interface of the second signal processor 210 is connected to the seventh adjustable voltage amplifying module 211 , the seventh parallel driver 212 , the second signal synchronization module 223 , the seventh parallel bias current driving module 224 , and the seventh group of LED/LD The series modules 225 are connected in sequence; the second output interface of the second signal processor 210 is connected to the eighth adjustable voltage amplifier module 213, the eighth parallel driver 214, the second signal synchronization module 223, the eighth parallel bias current driver module 226, The eighth group of LED/LD series modules 227 are connected in sequence; the third output interface of the second signal processor 210 is connected to the ninth adjustable voltage amplifying module 215, the ninth parallel driver 216, the second signal synchronization module 223, and the ninth parallel biasing module. The piezoelectric current drive module 228 and the ninth group of LED/LD series modules 229 are connected in sequence; the fourth output interface of the second signal processor 210 is connected to the tenth adjustable voltage amplifier module 217 , the tenth parallel driver 218 and the second signal synchronization module 223. The tenth parallel bias current drive module 230 and the tenth group of LED/LD series modules 231 are connected in sequence; the fifth output interface of the second signal processor 210 is connected in parallel with the eleventh adjustable voltage amplifying module 219 and the eleventh The driver 220, the second signal synchronization module 223, the eleventh parallel bias current drive module 232, and the eleventh group of LED/LD series modules 233 are connected in sequence; the sixth output interface of the second signal processor 210 is connected to the twelfth The voltage regulation amplifying module 221 , the twelfth parallel driver 222 , the second signal synchronization module 223 , the twelfth parallel bias current driving module 234 , and the twelfth group of LED/LD series modules 235 are connected in sequence.

The seventh group of LED/LD series modules 225, the eighth group of LED/LD series modules 227, the ninth group of LED/LD series modules 229, the tenth group of LED/LD series modules 231, the eleventh group of LED/LD series modules 233 The twelfth group of LED/LD series modules 235 are arranged on the same plane circuit light source board II. In this embodiment, the wall surface of the high-pressure and pressure-resistant sealing chamber 201 of the second dry chamber is provided with a glass window that can transmit laser light. Preferably, the glass window is The hemispherical transparent sealing window; the light source board II is arranged opposite to the glass window of the high-pressure and pressure-resistant sealing chamber 201 of the second dry chamber. In other embodiments, the light source panel II can be directly embedded on the wall of the second dry chamber high-pressure and pressure-resistant sealed chamber 201 .

The second signal processor 210 is used for digital signal modulation and transmission, signal reception and demodulation processing. The seventh adjustable voltage amplifying module 211, the eighth adjustable voltage amplifying module 213, the ninth adjustable voltage amplifying module 215, the The ten adjustable voltage amplifying module 217 , the eleventh adjustable voltage amplifying module 219 and the twelfth adjustable voltage amplifying module 221 are used to respectively amplify the data signals sent by the second signal processor 210 , and the seventh parallel driver 212 , the eighth parallel driver 214 , the ninth parallel driver 216 , the tenth parallel driver 218 , the eleventh parallel driver 220 and the twelfth parallel driver 222 are used for parallel multi-level current driving for the series LED/LD modules, and the second signal The synchronization module 223 is used for the first drive signal output by the seventh parallel driver 212 , the second drive signal output by the eighth parallel driver 214 , the third drive signal output by the ninth parallel driver 216 , and the tenth parallel driver 218 The fourth drive signal output, the fifth drive signal output by the eleventh parallel driver 220 and the sixth drive signal output by the twelfth parallel driver 222 are processed synchronously, so that the seventh group of LED/LD series modules 225, The eighth group of LED/LD series modules 227, the ninth group of LED/LD series modules 229, the tenth group of LED/LD series modules 231, the eleventh group of LED/LD series modules 233, the twelfth group of LED/LD series modules 235 output optical signal synchronization.

The second receiving unit includes a second signal sampling module 236, a second signal filtering module 237, a second signal amplifying module 238, a second photodetector 239, a second signal amplifying module 238, a second photodetector 239, a second signal a dichroic filter 240, a second color filter 241 and a second receiving lens 242;

The second photodetector 239, the second signal amplifying module 238, the second signal filtering module 237 and the second signal sampling module 236 are connected in sequence, and the output of the second signal sampling module 236 is connected to the input of the second signal processor 210; Two photodetectors 239 are arranged opposite to the second receiving lens 242, the second receiving lens 242 is a convex lens, the second photodetector 239 is located at the focal position of the beam of the second receiving lens 242, and the second dichroic is placed in order in the optical path between the two The filter 240 and the second color filter 241; the second receiving lens 242 is arranged in the cavity of the second dry chamber high pressure and pressure sealing chamber 201, and the second receiving lens 242 is connected to the second dry chamber high pressure and pressure sealing chamber 201 The glass windows are arranged opposite to each other, and the light source plate II and the second photodetector 239 share the same optical axis.

The transmitting unit and the receiving unit of the second communication device 2 share the second signal processor 210; and the transmitting unit and the receiving unit share a hemispherical transparent sealing window, the LED/LD array light source board is located in the central section of the hemisphere, and the second photodetector 239 receives light The surface is located at the center of the hemisphere receiving lens; the LED/LD array light source (light source board II) and the second photodetector 239 share the same optical axis. The existing technology mainly realizes the isolation of the LED/LD light source and the large-area array photodetector through physical isolation. It mainly uses two sealed cabins to physically isolate and realize the separation of transceivers, so that each platform needs to install two devices. , so as to realize the communication function. If the light source LED/LD light source and the photoelectric detector are installed in the same sealed compartment, the problem is that the transceiver isolation cannot be guaranteed, the local signal reflection is too large, and the opposite end signal demodulation cannot be guaranteed. Therefore, the present invention adopts half-duplex + color The combination of optical filter and narrow-band optical filter can solve the isolation problem. The integrated transceiver can greatly reduce the complexity and cost of the system and expand the scope of application.

The system needs to achieve effective large-angle emission, but the LED/LD single light source cannot meet the requirements, and the Gaussian distribution mode cannot meet the large-angle uniform emission requirements. Therefore, the present invention proposes an LED/LD array method to achieve emission, based on secondary light distribution. , Reasonable layout, through LightTools for distant light field intensity distribution and system link calculation, under the condition of ensuring low power consumption, heat dissipation and synchronization, 6 groups of LED/LD series modules are the optimal solution, which can achieve LD light source ≥ 120° Effective emission angle, LED≥150°effective emission angle.

The working process of the integrated underwater wireless optical communication device based on the LED/LD array transceiver in this embodiment is as follows:

The first signal processor 110 in the first communication device 1 generates and transmits six digital synchronization signals, which are the first signal, the second signal, the third signal, the fourth signal, the fifth signal and the second signal. road signal;

The first signal is amplified by the first adjustable voltage amplifying module 111 and sent to the first parallel driver 112 for conversion, and then entered into the first signal synchronization module 123 for multi-channel synchronization, and then sent to the first parallel bias current driving module 124 , the first parallel bias current driving module 124 drives the first group of LED/LD series modules 125, so that the operating voltage of the LED/LD is within the linear range, and modulates the digital signal to the optical signal; The amplification of the adjustable voltage amplifying module 113 is sent to the second parallel driver 114 for conversion, and then enters the multi-channel synchronization of the first signal synchronization module 123, and then sent to the second parallel bias current driving module 126. The second parallel bias current The driving module 126 drives the second group of LED/LD series modules 127, so that the operating voltage of the LED/LD is within the linear range, and modulates the digital signal to the optical signal; the third channel signal passes through the third adjustable voltage amplification module 115. Amplified and sent to the third parallel driver 116 for conversion, and then entered into the first signal synchronization module 123 for multi-channel synchronization, and then sent to the third parallel bias current driving module 128, which drives the third group of The LED/LD series module 129 keeps the operating voltage of the LED/LD within the linear range, and modulates the digital signal to the optical signal; the fourth channel signal is amplified by the fourth adjustable voltage amplifying module 117 and sent to the fourth parallel driver 118 conversion, and then enter the multi-channel synchronization of the first signal synchronization module 123, and then sent to the fourth parallel bias current driving module 130, and the fourth parallel bias current driving module 130 drives the fourth group of LED/LD series modules 131, The operating voltage of the LED/LD is in the linear range, and the digital signal is modulated to the optical signal; the fifth signal is amplified by the fifth adjustable voltage amplifying module 119 and sent to the fifth parallel driver 120 for conversion, and then enters the first After the multi-channel synchronization of the signal synchronization module 123 is sent to the fifth parallel bias current driving module 132, the fifth parallel bias current driving module 132 drives the fifth group of LED/LD series modules 133 to make the LED/LD working voltage is in the linear range, and modulates the digital signal to the optical signal; the sixth signal is amplified by the sixth adjustable voltage amplifying module 121 and sent to the sixth parallel driver 122 for conversion, and then enters the multi-channel of the first signal synchronization module 123 After synchronization, it is sent to the sixth parallel bias current driving module 134, and the sixth parallel bias current driving module 134 drives the sixth group of LED/LD series modules 135, so that the operating voltage of the LED/LD is within the linear range, and the The digital signal is modulated onto the optical signal;

Six groups of LED/LD series modules (the first group of LED/LD series modules 125, the second group of LED/LD series modules 127, the third group of LED/LD series modules 129, the fourth group of LED/LD series modules 131, the fifth group of LED/LD series modules 129, the fifth group of LED/LD series modules The six-channel LED/LD signals of the group LED/LD series module 133 and the sixth group LED/LD series module 135) are synchronously output, and transmitted to the second receiving lens 242 of the second communication device 2 through the underwater channel, and the second color filter The light plate 241 and the second dichroic filter 240 are placed on the optical path between the second receiving lens 242 and the second photodetector 239, and the second color filter 241 and the second dichroic filter 240 filter After the background light and stray light are removed, the second photodetector 239 converts the electrical signal into an electrical signal. The electrical signal is amplified by the second signal amplifying module 238 and filtered by the second signal filtering module 237 in sequence, and then sent to the The second signal sampling module 236, after sampling the high-speed signal by the second signal sampling module 236, enters the second signal processor 210 through the parallel high-speed communication interface, and performs signal demodulation processing on the input electrical signal, thus realizing the one-way communication function.

At the same time, the second signal processor 210 in the second communication device 2 generates and transmits six digital synchronization signals, which are the seventh signal, the eighth signal, the ninth signal, the tenth signal, and the eleventh signal. and the twelfth signal;

The seventh channel signal is amplified by the seventh adjustable voltage amplifying module 211 and sent to the seventh parallel driver 112 for conversion, and then entered into the second signal synchronization module 223 for multi-channel synchronization, and then sent to the seventh parallel bias current driving module 224 , the seventh parallel bias current drive module 224 drives the seventh group of LED/LD series modules 225, so that the operating voltage of the LED/LD is within the linear range, and the digital signal is modulated onto the optical signal; The amplification of the adjustable voltage amplifying module 213 is sent to the eighth parallel driver 214 for conversion, and then entered into the second signal synchronization module 223 for multi-channel synchronization, and then sent to the eighth parallel bias current driving module 226. The eighth parallel bias current The driving module 226 drives the eighth group of LED/LD series modules 227, so that the working voltage of the LED/LD is within the linear range, and modulates the digital signal to the optical signal; Amplified and sent to the ninth parallel driver conversion 216, and then entered into the second signal synchronization module 223 for multi-channel synchronization, and then sent to the ninth parallel bias current driving module 228, which drives the ninth group The LED/LD series module 229 keeps the working voltage of the LED/LD within the linear range, and modulates the digital signal to the optical signal; the tenth signal is amplified by the tenth adjustable voltage amplifying module 217 and sent to the tenth parallel driver 218 is converted, and then enters the multi-channel synchronization of the second signal synchronization module 223, and is sent to the tenth parallel bias current driving module 230, and the tenth parallel bias current driving module 230 drives the tenth group of LED/LD series modules 231, The operating voltage of the LED/LD is in the linear range, and the digital signal is modulated to the optical signal; the eleventh signal is amplified by the eleventh adjustable voltage amplifying module 219 and sent to the eleventh parallel driver 220 for conversion, and then After entering the multi-channel synchronization of the second signal synchronization module 223, it is sent to the eleventh parallel bias current driving module 232, and the eleventh parallel bias current driving module 232 drives the eleventh group of LED/LD series modules 233, so that the The operating voltage of the LED/LD is within the linear range, and the digital signal is modulated onto the optical signal; the twelfth channel signal is amplified by the twelfth adjustable voltage amplifying module 221 and sent to the twelfth parallel driver 222 for conversion, and then enters the After the multi-channel synchronization of the second signal synchronization module 223 is sent to the twelfth parallel bias current driving module 234, the twelfth parallel bias current driving module 234 drives the twelfth group of LED/LD series modules 235, so that the LEDs The operating voltage of the /LD is in the linear range and modulates the digital signal onto the optical signal;

Six groups of LED/LD series modules (the seventh group of LED/LD series modules 225, the eighth group of LED/LD series modules 227, the ninth group of LED/LD series modules 229, the tenth group of LED/LD series modules 231, the tenth group of LED/LD series modules 231, the tenth group of LED/LD series modules The six-channel LED/LD signals of a group of LED/LD series modules 233 and the twelfth group of LED/LD series modules 235) are synchronously output, and transmitted to the first receiving lens 142 of the first communication device 1 through the underwater channel. The color filter 141 and the first dichroic filter 140 are placed on the optical path between the first receiving lens 142 and the first photodetector 139, and the first color filter 141 and the first dichroic filter 140 filters out background light and stray light, and is converted into an electrical signal by the first photodetector 139, and the electrical signal is amplified by the first signal amplification module 138, the first signal filtering module 137 noise filtering and the first signal sampling module respectively in turn. 136 high-speed signal sampling, and then enter the first signal processor 110 through the high-speed communication interface for signal demodulation processing, so as to realize the complete bidirectional communication function.

In this embodiment, the LED/LD arrays in the transmitting units of the first communication device 1 and the second communication device 2 are reasonably arranged to realize simultaneous transmission of high-power emission and uniform distribution of large-angle light fields. The communication system can improve the ability and compatibility of the establishment and maintenance of optical communication links under the environment of low platform alignment and shaking, turbid seawater, dust caused by seabed exploration or construction, and other seabed biological shelters, and ensure that the system is complex underwater. The link is quickly established and stable in the environment.

The photodetector in the receiving unit of the first communication device 1 and the second communication device 2 adopts a large area array high-sensitivity detector, and the received light signal intensity is further improved through the receiving lens, and the color filter and the dichroic filter are used for the detection. Suppression and elimination of background light and stray light, improve the receiving sensitivity of the system, and improve the communicable distance and receiving field of view of the system under the same water quality conditions.

Optical communication equipment based on high-power, wide-angle emission and wide-field-of-view receiving technology can ensure that the system can establish and maintain links even in different environments such as low platform alignment and shaking, turbid water quality, dust, and partial occlusion, thereby greatly reducing Improve the scope of application of the underwater wireless blue-green optical communication system, so that the system can be used normally in different sea areas and underwater lakes, and at the same time reduce the alignment requirements between the carrying platforms.

The LED/LD array light sources in the emission units of the first communication device 1 and the second communication device 2 emit, and the emission power of the light sources is relatively large. As a secondary technical effect, the emission light source can also be used for underwater lighting and underwater platform recovery guide light source.

Finally, it should be noted that the above enumerations are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible, such as replacing the LED/LD array with an LD array, increasing the power of a single light source, decreasing the number, and increasing the emission of optical lenses. All deformations that those of ordinary skill in the art can directly derive or associate from the disclosed content of the present invention shall be considered as the protection scope of the present invention.

Claims (8)

1. an integrated underwater wireless blue-green light communication system based on LED/LD array transceiver, is characterized in that: comprise two pressure-resistant sealed cabins and two communication devices that are respectively arranged in two pressure-resistant sealed cabins; Each of the communication devices includes a transmitting unit, a signal processor and a receiving unit arranged in the pressure-resistant sealed cabin; The transmitting unit includes M adjustable voltage amplification modules, M parallel drivers, 1 signal synchronization module, M parallel bias current driving modules and M groups of LED/LD series modules, where M is an integer and 3≤M ≤9; The outputs of the signal processor are respectively connected with the inputs of the M adjustable voltage amplifying modules, the outputs of the M adjustable voltage amplifying modules are respectively connected with the inputs of the M parallel drivers, and the outputs of the M parallel drivers are respectively connected through the signal synchronization module. connected with the inputs of the M parallel bias current driving modules, and the outputs of the M parallel bias current driving modules are respectively connected with the inputs of the M groups of LED/LD series modules; The receiving unit includes a signal sampling module, a signal filtering module, a signal amplifying module, a photodetector and a receiving lens; the photodetector is located at the focal position of the beam of the receiving lens, and a filter component is arranged on the optical path between the two; The output of the detector is connected with the input of the signal processor through the signal amplification module, the signal filtering module and the signal sampling module arranged in sequence; The pressure-resistant sealed cabin is provided with a glass window, and the glass window is an arc-shaped structure that is convex to the outside. common optical axis; Alternatively, both the light source board and the receiving lens of the M group LED/LD series module are arranged on the pressure-resistant sealed cabin, and the position where the light source board or the receiving lens is installed on the pressure-resistant sealed cabin is an arc-shaped structure that is convex to the outside, and the light source board and The photodetectors share the same optical axis; Two communication devices are arranged opposite to the outwardly convex arc structure; M LED/LD signals synchronously output by M groups of LED/LD series modules of one communication device are transmitted to the receiving lens of the other communication device through the channel. 2. The integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to claim 1, characterized in that: the filter assembly comprises a dichroic filter and a color filter that are sequentially arranged along the optical path , and the dichroic filter is placed close to the photodetector. 3 . The integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to claim 2 , wherein the photodetector adopts a large-area array photodetector. 4 . 4. the integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to claim 3, is characterized in that: The receiving lens is a square convex lens facing away from the color filter. 5 . The integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to any one of claims 1 to 4 , wherein the M is 6. 6 . 6 . The integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to claim 5 , wherein the M groups of LED/LD series modules are arranged on the same plane circuit light source board. 7 . 7 . The integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to claim 1 , wherein the glass window is a hemispheric transparent sealing window. 8 . 8. An integrated underwater wireless blue-green light communication method based on LED/LD array transceiver, characterized in that, adopting the integrated underwater wireless blue-green light communication system based on LED/LD array transceiver according to any one of claims 1 to 7, Include the following steps: 1.1) The signal processor of one of the communication devices sends M digital synchronization signals; 1.2) After the M channels of digital synchronization signals are amplified by the M adjustable voltage amplifying modules, they are sent to the M parallel drivers. After the multi-channel synchronization of the signal synchronization module, they are sent to the M parallel bias current driving modules. The piezoelectric current drive module drives M groups of LED/LD series modules, so that the working voltage of each LED/LD is within the linear range, and modulates the digital signal to the optical signal, so that the M groups of LED/LD series modules can output M LEDs synchronously /LD signal; 1.3) The M-channel LED/LD signal is transmitted to the receiving lens of another communication device through the underwater channel, and after the background light and stray light are filtered out by the filter component of the second communication device, it is detected by the photoelectricity of the second communication device. receiver; 1.4) The photodetector converts the received LED/LD signal into an electrical signal, and then enters the signal processor for signal demodulation after amplification by the signal amplification module, noise filtering by the signal filtering module, and high-speed signal sampling by the signal sampling module. processing and communication.

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