CN109586744A - A kind of waterproof energy-saving type VOCA voice communications assembly - Google Patents
A kind of waterproof energy-saving type VOCA voice communications assembly Download PDFInfo
- Publication number
- CN109586744A CN109586744A CN201811406682.0A CN201811406682A CN109586744A CN 109586744 A CN109586744 A CN 109586744A CN 201811406682 A CN201811406682 A CN 201811406682A CN 109586744 A CN109586744 A CN 109586744A
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- Prior art keywords
- voice communication
- upper layer
- module
- communication plate
- lower layer
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- 238000004891 communication Methods 0.000 title claims abstract description 166
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 238000003780 insertion Methods 0.000 claims abstract 2
- 230000037431 insertion Effects 0.000 claims abstract 2
- 230000005236 sound signal Effects 0.000 claims description 34
- 238000012545 processing Methods 0.000 claims description 28
- 230000036039 immunity Effects 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B2001/3894—Waterproofing of transmission device
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The invention proposes a kind of waterproof energy-saving type VOCA voice communications assemblies, including waterproof case, upper layer voice communication plate, lower layer's voice communication plate, insulation board, sealing cover；Upper layer voice communication plate, lower layer's voice communication plate, insulation board are equipped with inside the waterproof case, the side of the waterproof case is equipped with slot, in the sealing cover insertion slot, upper layer voice communication plate, lower layer's voice communication plate, insulation board are sealed in the sealing space that waterproof case and sealing cover surround, upper layer communication antenna, lower layer's communication antenna are additionally provided on the sealing cover, the bottom of the upper layer communication antenna and upper layer voice communication plate grafting, lower layer's communication antenna and lower layer's voice communication plate grafting.The present invention uses totally enclosed sealing structure, can greatly improve the waterproof performance of device entirety, additionally it is possible to avoid external environment from corroding voice communication plug-in unit, to improve the service life of device.
Description
Technical field
The present invention relates to audio communication technologies field, in particular to a kind of waterproof energy-saving type VOCA voice communications assembly.
Background technique
With the rapid development of marine trade and sea fishery, existing overocean communications technology has been far from satisfying ship
Oceangoing ship and on the bank between information transmission, the waterproof performance of current existing VOCA voice communications assembly is poor, be easy by seawater corrosion,
And only it is able to achieve one-way communication.
Summary of the invention
The purpose of the present invention aims to solve at least one of described technological deficiency.
For this purpose, it is an object of the invention to propose a kind of waterproof energy-saving type VOCA voice communications assembly, waterproof performance is good, can
Realize two-way communication.
To achieve the goals above, the present invention provides a kind of waterproof energy-saving type VOCA voice communications assembly, including waterproof case, on
Layer voice communication plate, lower layer's voice communication plate, insulation board, sealing cover；Be equipped with inside the waterproof case upper layer voice communication plate,
Lower layer's voice communication plate, insulation board, and upper layer voice communication plate is set to above insulation board, lower layer's voice communication plate setting
Below insulation board；The side of the waterproof case is equipped with slot, and the sealing cover is inserted into slot, by upper layer voice communication
Plate, lower layer's voice communication plate, insulation board are sealed in the sealing space that waterproof case and sealing cover surround, on the sealing cover also
Equipped with upper layer communication antenna, lower layer's communication antenna, the bottom of the upper layer communication antenna and upper layer voice communication plate grafting are described
Lower layer's communication antenna and lower layer's voice communication plate grafting.
Preferably, the upper layer voice communication plate is equipped with the first wireless communication unit, audio signal filter, audio
Signal amplification module, the first audio-frequency signal processing module.
In any of the above-described scheme preferably, the output end and audio signal filter of first wireless communication unit
Input terminal connection, the input terminal of the output end of the audio signal filter and audio signal amplification module, the audio letter
The output end of number amplification module is connect with the input terminal of the first audio-frequency signal processing module.
In any of the above-described scheme preferably, be additionally provided on the upper layer voice communication plate phase equilibrium adjustment module,
Detecting phase module, the input terminal of the output end connection phase equilibrium adjustment module of the detecting phase module, the phase are flat
The output end for the adjustment module that weighs connects the input terminal connection of the first audio-frequency signal processing module.
In any of the above-described scheme preferably, first wireless communication unit and upper layer communication antenna are electrically connected.
In any of the above-described scheme preferably, lower layer's voice communication plate is equipped with the second Audio Signal Processing mould
Block, audio coding module, immunity module, the second wireless communication unit.
In any of the above-described scheme preferably, the output end of second audio-frequency signal processing module connects audio coding
The input terminal of module, the output end of the audio coding module and the input terminal of immunity module connect, the immunity module
Output end connect with the input terminal of the second wireless communication unit.
In any of the above-described scheme preferably, second wireless communication unit and lower layer's communication antenna are electrically connected.
In any of the above-described scheme preferably, in the upper and lower layer voice communication plate of the upper layer voice communication plate, insulation board
Corresponding position be equipped with through-hole；It is electrically connected on the upper layer voice communication plate by through-hole and lower layer's voice communication plate.
In any of the above-described scheme preferably, the upper layer communication antenna, lower layer's communication antenna all with seal cap sealing
It is fixed.
Waterproof energy-saving type VOCA voice communications assembly of the invention has the advantages that
1, the present invention uses totally enclosed sealing structure, can greatly improve the waterproof performance of device entirety, additionally it is possible to keep away
Exempt from external environment corrosion voice communication plug-in unit, to improve the service life of device.
2, in the present invention when needing replacing component, after can remove waterproof gasket cement, sealing cover and voice communication are inserted
Part takes apart from waterproof case, easy for assemble or unload.
3, the present invention detects the phase of audio signal by detecting phase module, then equals detection signal transmission phase
Weighing apparatus adjustment module is then issued by phase equilibrium adjustment module when detecting phase module detects the phase anomaly of audio signal
Phase cancellation signal gives the first audio-frequency signal processing module, is being carried out by the first audio-frequency signal processing module using phase cancellation method
Feedback signal is offset, so that improving transmitting-receiving inhibits ratio, improves the anti-interference ability of audio signal.
4, the present invention use insulation board design, can enable upper layer voice communication plate, lower layer's voice communication plate with it is outer
Portion individually communicated, moreover it is possible to avoid signal from interfering with each other in processing transmission process, to realize bi-directional audio signals
Transmission, to improve whole application range.
5, structure of the invention is simple, and each component number is fewer, and manufacturing cost is low, and little power consumption, can be realized section
Energy.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is structure chart of the invention；
Fig. 2 is the cross-sectional view of upper layer communication antenna of the invention；
Fig. 3 is schematic diagram of internal structure of the invention；
Fig. 4 is the cross-sectional view of lower layer's communication antenna of the invention
Fig. 5 is the internal structure block diagram of voice communication plate in upper layer of the invention and lower layer's voice communication plate.
In figure, 1, upper layer voice communication plate；2, lower layer's voice communication plate；3, waterproof case；4, insulation board；5, through-hole；6,
Sealing cover；101, the first wireless communication unit；102, audio signal filter；103, audio signal amplification module；104, first
Audio-frequency signal processing module；105, phase equilibrium adjustment module；106, detecting phase module；107, upper layer communication antenna；201,
Second audio-frequency signal processing module；202, audio coding module；203, immunity module；204, the second wireless communication unit；
205, lower layer's communication antenna；
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The present invention provides a kind of waterproof energy-saving type VOCA voice communications assembly, with reference to shown in attached drawing 1-5, including waterproof case 3, on
Layer voice communication plate 1, lower layer's voice communication plate 2, insulation board 4, sealing cover 6；Voice communication plate in upper layer is equipped with inside waterproof case 3
1, lower layer's voice communication plate 2, insulation board 4, and upper layer voice communication plate 1 is set to 4 top of insulation board, lower layer's voice communication plate 2
It is set to 4 lower section of insulation board；The side of waterproof case 3 is equipped with slot, and sealing cover 6 is inserted into slot, by upper layer voice communication plate
1, lower layer's voice communication plate 2, insulation board 4 are sealed in the sealing space that waterproof case 3 and sealing cover 6 surround, on sealing cover 6 also
Equipped with upper layer communication antenna 107, lower layer's communication antenna 205, the bottom of upper layer communication antenna 107 and upper layer voice communication plate 1 are inserted
It connects, lower layer's communication antenna 205 and 2 grafting of lower layer's voice communication plate.
When installation, upper layer voice communication plate 1 and lower layer's voice communication plate 2 are fixed on to the two sides up and down of insulation board 4 first,
Audio communication plug is set up into, then voice communication plug-in unit is inserted into waterproof case 3, then sealing cover 6 is inserted into outside waterproof
In shell 3 in slot, so that upper layer communication antenna 107 and 1 grafting of upper layer voice communication plate, lower layer's communication antenna 205 and lower layer's sound
2 grafting of frequency communication board；Then sealing cover 6 and waterproof case 3 are sealed by waterproof gasket cement.
The present invention uses totally enclosed sealing structure, can greatly improve the waterproof performance of device entirety, additionally it is possible to avoid
External environment corrodes voice communication plug-in unit, to improve the service life of device.
When needing replacing component, after can remove waterproof gasket cement, by sealing cover 6 and voice communication plug-in unit outside waterproof
It is taken apart in shell 3, it is easy for assemble or unload.
In addition, upper layer voice communication plate 1 and lower layer's voice communication plate 2 are communicated by upper layer communication antenna 107, lower layer respectively
Antenna 205 and external communication device realize two-way video communication.
In another embodiment of the invention, upper layer voice communication plate 1 is equipped with the first wireless communication unit 101, audio
Traffic filter 102, audio signal amplification module 103, the first audio-frequency signal processing module 104.
The output end of first wireless communication unit 101 is connect with the input terminal of audio signal filter 102, audio signal filter
The input terminal of the output end of wave device 102 and audio signal amplification module 103, the output end of audio signal amplification module 103 and the
The input terminal of one audio-frequency signal processing module 104 connects.
When upper layer voice communication plate 1 works, the signal received is passed to audio signal by the first wireless communication unit 101
Then filter 102 is being transferred to audio signal amplification module 103 by 102 filtering interference signals of audio signal filter, by
Audio signal amplification module 103 carries out signal enhanced processing to the signal received, then exports to the first Audio Signal Processing
Module 104 carries out Audio Signal Processing by the first audio-frequency signal processing module 104.
In another embodiment of the invention, inhibits ratio to greatly improve transmitting-receiving, be additionally provided on upper layer voice communication plate 1
The output end connection phase equilibrium of phase equilibrium adjustment module 105, detecting phase module 106, detecting phase module 106 adjusts mould
The input terminal of block 105, the output end of phase equilibrium adjustment module 105 connect the input terminal of the first audio-frequency signal processing module 104
Connection.
When work, the phase of audio signal is detected by detecting phase module 106, detection signal is then transmitted into phase
Balance adjustment module 105 is then adjusted by phase equilibrium when detecting phase module 106 detects the phase anomaly of audio signal
Module 105 issues phase cancellation signal to the first audio-frequency signal processing module 104, by the first audio-frequency signal processing module 104
Counteracting feedback signal is carried out using phase cancellation method, so that improving transmitting-receiving inhibits ratio, improves the anti-interference ability of audio signal.
In another embodiment of the invention, in order to be wirelessly connected with the external world, the first wireless communication unit 101 with it is upper
Layer communication antenna 107 is electrically connected.
In another embodiment of the invention, lower layer's voice communication plate 2 be equipped with the second audio-frequency signal processing module 201,
Audio coding module 202, immunity module 203, the second wireless communication unit 204.
The input terminal of the output end connection audio coding module 202 of second audio-frequency signal processing module 201, audio coding mould
The output end of block 202 is connect with the input terminal of immunity module 203, the output end of immunity module 203 and the second wireless communication
The input terminal of unit 204 connects.
When work, at the signal that the second audio-frequency signal processing module 201 transmits upper layer voice communication plate 1
Reason, treated, and signal is encoded through audio coding module 202, and the signal after coding is transferred to immunity module, to signal
Compression encryption is carried out, signal is avoided to lose in transmission process, then will be compressed under encrypted signal passes through by immunity module
Layer communication antenna 205 transfers out, and is transferred to neighbouring receiving unit.
In another embodiment of the invention, in order to be communicated with neighbouring receiving unit, the second wireless communication unit
204 are electrically connected with lower layer's communication antenna 205.
In another embodiment of the invention, in upper layer voice communication plate 1 upper and lower layer of voice communication plate 2, insulation board 4
Corresponding position is equipped with through-hole 5；It is electrically connected on upper layer voice communication plate 1 by through-hole 5 and lower layer's voice communication plate 2.
Using the design of insulation board, upper layer voice communication plate 1, lower layer's voice communication plate 2 and outside can be enable to carry out
Individually communicated, moreover it is possible to avoid signal from interfering with each other in processing transmission process, thus realize that bi-directional audio signals transmit, from
And improve whole application range.
In another embodiment of the invention, in order to realize sealing, upper layer communication antenna 107, lower layer's communication antenna 205 are all
It seals and fixes with sealing cover 6.
Further include power module in another embodiment of the invention, the power module to upper layer voice communication plate 1,
Lower layer's voice communication plate 2 is powered.
Structure of the invention is simple, and each component number is fewer, and manufacturing cost is low, and little power consumption, can be realized energy conservation.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.The scope of the present invention
It is extremely equally limited by appended claims.
Claims (10)
1. a kind of waterproof energy-saving type VOCA voice communications assembly, which is characterized in that including waterproof case, upper layer voice communication plate, lower layer
Voice communication plate, insulation board, sealing cover；Upper layer voice communication plate, lower layer's voice communication plate, absolutely are equipped with inside the waterproof case
Listrium, and upper layer voice communication plate is set to above insulation board, lower layer's voice communication plate is set to below insulation board；It is described
The side of waterproof case is equipped with slot, in sealing cover insertion slot, by upper layer voice communication plate, lower layer's voice communication plate,
In the sealing space that insulation board is sealed in waterproof case and sealing cover surrounds, be additionally provided on the sealing cover upper layer communication antenna,
Lower layer's communication antenna, the bottom of the upper layer communication antenna and upper layer voice communication plate grafting, lower layer's communication antenna is under
Layer voice communication plate grafting.
2. waterproof energy-saving type VOCA voice communications assembly as described in claim 1, it is characterised in that: on the upper layer voice communication plate
Equipped with the first wireless communication unit, audio signal filter, audio signal amplification module, the first audio-frequency signal processing module.
3. waterproof energy-saving type VOCA voice communications assembly as claimed in claim 2, it is characterised in that: first wireless communication unit
Output end connect with the input terminal of audio signal filter, the output end of the audio signal filter and audio signal are amplified
The output end of the input terminal of module, the audio signal amplification module is connect with the input terminal of the first audio-frequency signal processing module.
4. waterproof energy-saving type VOCA voice communications assembly as claimed in claim 2, it is characterised in that: on the upper layer voice communication plate
It is additionally provided with phase equilibrium adjustment module, detecting phase module, the output end connection phase equilibrium of the detecting phase module is adjusted
The input terminal of module, the input terminal that the output end of the phase equilibrium adjustment module connects the first audio-frequency signal processing module connect
It connects.
5. waterproof energy-saving type VOCA voice communications assembly as claimed in claim 2, it is characterised in that: first wireless communication unit
It is electrically connected with upper layer communication antenna.
6. waterproof energy-saving type VOCA voice communications assembly as described in claim 1, it is characterised in that: on lower layer's voice communication plate
Equipped with the second audio-frequency signal processing module, audio coding module, immunity module, the second wireless communication unit.
7. waterproof energy-saving type VOCA voice communications assembly as claimed in claim 6, it is characterised in that: second Audio Signal Processing
The input terminal of the output end connection audio coding module of module, the output end of the audio coding module and immunity module it is defeated
Enter end connection, the output end of the immunity module is connect with the input terminal of the second wireless communication unit.
8. waterproof energy-saving type VOCA voice communications assembly as claimed in claim 6, it is characterised in that: second wireless communication unit
It is electrically connected with lower layer's communication antenna.
9. waterproof energy-saving type VOCA voice communications assembly as described in claim 1, it is characterised in that: in the upper layer voice communication plate
The corresponding position of layer voice communication plate, insulation board is equipped with through-hole above and below；On the upper layer voice communication plate through through-hole under
Layer voice communication plate is electrically connected.
10. waterproof energy-saving type VOCA voice communications assembly as described in claim 1, it is characterised in that: the upper layer communication antenna, under
Layer communication antenna is all fixed with seal cap sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406682.0A CN109586744B (en) | 2018-11-23 | 2018-11-23 | Waterproof energy-saving audio communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406682.0A CN109586744B (en) | 2018-11-23 | 2018-11-23 | Waterproof energy-saving audio communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109586744A true CN109586744A (en) | 2019-04-05 |
| CN109586744B CN109586744B (en) | 2020-08-18 |
Family
ID=65924229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811406682.0A Active CN109586744B (en) | 2018-11-23 | 2018-11-23 | Waterproof energy-saving audio communication device |
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| CN201286130Y (en) * | 2008-09-19 | 2009-08-05 | 天津七六四通信导航技术有限公司 | Audio uni-channel duplex communication circuit |
| CN102780501A (en) * | 2012-05-30 | 2012-11-14 | 深圳光启创新技术有限公司 | Radio frequency device |
| CN202679548U (en) * | 2012-08-03 | 2013-01-16 | 赵宝泉 | Two-way intercommunication system for coal mine |
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| CN203372395U (en) * | 2013-04-27 | 2014-01-01 | 湖北易瓦特科技有限公司 | An earth station for an unmanned aerial vehicle |
| CN104124522A (en) * | 2014-07-18 | 2014-10-29 | 广州中海达卫星导航技术股份有限公司 | Miniature four-feed-point measuring antenna device |
| US20150293213A1 (en) * | 2014-04-10 | 2015-10-15 | Franklin S. Felber | Efficient, high-power mechanical transducers for acoustic waves in dense media |
| CN207321270U (en) * | 2017-11-09 | 2018-05-04 | 湖南人文科技学院 | A kind of SCM Based network signal communication device |
-
2018
- 2018-11-23 CN CN201811406682.0A patent/CN109586744B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201286130Y (en) * | 2008-09-19 | 2009-08-05 | 天津七六四通信导航技术有限公司 | Audio uni-channel duplex communication circuit |
| CN102882995A (en) * | 2011-07-13 | 2013-01-16 | Lg电子株式会社 | Mobile terminal |
| CN102780501A (en) * | 2012-05-30 | 2012-11-14 | 深圳光启创新技术有限公司 | Radio frequency device |
| CN202679548U (en) * | 2012-08-03 | 2013-01-16 | 赵宝泉 | Two-way intercommunication system for coal mine |
| CN203372395U (en) * | 2013-04-27 | 2014-01-01 | 湖北易瓦特科技有限公司 | An earth station for an unmanned aerial vehicle |
| US20150293213A1 (en) * | 2014-04-10 | 2015-10-15 | Franklin S. Felber | Efficient, high-power mechanical transducers for acoustic waves in dense media |
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| CN109586744B (en) | 2020-08-18 |
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