Underground intercom system
A technology of intercom system and conversion unit, which is applied in the field of communication, can solve problems affecting communication quality and transmission distance, and achieve the effects of lighting and communication, high response sensitivity, and good modulation performance
Inactive Publication Date: 2018-03-30
重庆市万盛区杜宇机电有限责任公司
0 Cites 3 Cited by
AI-Extracted Technical Summary
Problems solved by technology
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreAbstract
The invention provides an underground intercom system, which includes a voice input unit, an amplification unit, an AD conversion unit, a coding unit, a lighting modulation circuit, a lighting unit, an optical concentrator, a photoelectric detector, an amplifier, a decoding unit, a DA conversion unit, a power Amplifying unit and voice output unit. The transmitter sends the collected analog audio signal to the control unit for amplification, AD conversion and Manchester encoding, and the digital signal is loaded to the lighting modulation drive circuit. The optical concentrator converges the optical signal to the photosensitive surface of the photodetector, the optical signal is converted into an electrical signal, and regenerated into the original Manchester coded signal, and then the signal is decoded and DA converted by the control unit. Finally, the signal is amplified and loaded onto the small speaker to restore the voice signal. The invention utilizes the outstanding advantages of high LED response sensitivity and good modulation performance to realize visible light wireless communication of LED miner's lights, and the background conditions of underground darkness and low reflection intensity are conducive to the transmission of visible light, and can realize both lighting and communication.
Application Domain
Technology Topic
Image
Examples
- Experimental program(1)
Example Embodiment
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM


Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Similar technology patents
Spool valve
ActiveUS20170211699A1Increase degree of openingImprove responsivenessOperating means/releasing devices for valvesServomotor componentsEngineeringSpool valve
Owner:NTN CORP
Liquid crystal display module and adjustment method of response speed thereof
ActiveCN102169680AImprove responsivenessStatic indicating devicesLiquid-crystal displayTemperature sense
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Bluetooth interconnection method and system for mobile terminal
ActiveCN105406923AImprove responsivenessReduce Bluetooth transmission delayConnection managementTransmission monitoringVIT signalsTransmission delay
Owner:雷鸟创新技术(深圳)有限公司
Rack-and-pinion steering gear unit
InactiveCN102892663APrevent operating forceImprove responsivenessMechanical steering gearsFriction gearingsNeedle roller bearingRack and pinion
Owner:NSK LTD
Strain sensor with high sensitivity and large strain response and preparation method thereof
ActiveCN108050926AImprove responsivenessLarge strain sensing rangeElectrical/magnetic solid deformation measurementConductive coatingStrain sensor
Owner:ZHENGZHOU UNIV
Classification and recommendation of technical efficacy words
- Improve responsiveness
Internal EGR cooler
ActiveUS6932063B1Improve responsivenessIncrease responsivenessInternal combustion piston enginesNon-fuel substance addition to fuelEngineeringHeat exchanger
Owner:EATON INTELLIGENT POWER LIMITED
Redundant electrohydraulic servo-controlling system
InactiveCN101245794AImprove responsivenessGuaranteed reliable operationServomotor componentsTraffic volumeProportioning valve
Owner:TAIYUAN UNIV OF TECH
Power control method based on hybrid power source for hybrid power
InactiveCN103802821AImprove responsivenessReduce discharge currentHybrid vehiclesElectrodynamic brake systemsPower controlCapacitance
Owner:CHINA NORTH VEHICLE RES INST
Imaging device and endoscope apparatus including the same
ActiveUS20140364690A1Improve responsivenessExcellent color reproducibilityTelevision system detailsSurgeryRolling shutterLight source
Owner:FUJIFILM CORP