CN106411411A - Infrared voice and data transmission communication system - Google Patents
Infrared voice and data transmission communication system Download PDFInfo
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- CN106411411A CN106411411A CN201610838522.8A CN201610838522A CN106411411A CN 106411411 A CN106411411 A CN 106411411A CN 201610838522 A CN201610838522 A CN 201610838522A CN 106411411 A CN106411411 A CN 106411411A
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- 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
- H04B10/40—Transceivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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Abstract
The invention belongs to the technical field of infrared communication, and provides an infrared voice and data transmission communication system. The infrared voice and data transmission communication system comprises an audio processing module, a temperature and humidity sensor, a temperature and humidity signal modulation module, an infrared emission module, a relay forwarding module and an infrared receiving module; an output end of the audio processing module is connected with an input end of the infrared emission module; the output end of the temperature and humidity sensor is connected with the input end of the temperature and humidity signal modulation module; the output end of the temperature and humidity signal modulation module is connected with the input end of the infrared emission module; the output end of the infrared emission module is connected with the input end of the relay forwarding module; and the output end of the relay forwarding module is connected with the input end of the infrared receiving module. The entire system design of the infrared voice and data transmission communication system provided by the invention has the advantages of low cost, low power consumption, simple structure, strong expansibility and low interference.
Description
【Technical field】
The present invention relates to infrared communication technique field is and in particular to a kind of infrared voice data transmits communication system.
【Background technology】
Infrared technique is the important component part of advanced science and technology, is widely used in remote control and transmission aspect.Infrared logical
Letter be using infrared medium to realize a little between closely secret communication and information forward technology.It typically by infrared emission and
Reception system part forms.Emission system launches infrared signal after one source of infrared radiation is modulated, and reception system
Received with Optical devices and Infrared Detectorss, this just constitutes infrared communication system.Infrared communication system has confidentiality
By force, information capacity is big, structure is simple, good directionality, from electromagnetic interference, adaptability with low cost, cross-platform be good, transfer rate
High the advantages of, so be commonly used in point-to-point communication data link system.The maximum feature of infrared communication is that it instead of
Traditional cable connects, meet when different platform equipment connects for tailored interfaces requirement so that between cross-platform device
Data exchange is simplified.Have that small volume, low in energy consumption, function be strong due to infrared communication, low cost the features such as, thus, continue
After colour TV, videocorder, also numerous and confused on other miniature relay devices such as recorder, stereo set, air conditioner and toy
Using infrared communication technology, infrared communication technology is not only completely reliable but also can be effectively isolated electrical equipment interference.
And existing conventional infrared voice data transmission communication system has the shortcomings that transmission range is short, and the signal such as humiture
Distorted signals are easily caused by infrared remote transmission, limit the use in some occasions.
【Content of the invention】
The goal of the invention of the present invention is：For above-mentioned problem, provide a kind of transmission range farther out, humiture letter
Number normal infrared voice data of transmission transmits communication system.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of infrared voice data transmits communication system, including audio processing modules, Temperature Humidity Sensor, humiture letter
Number modulation module, infrared transmission module, relay forwarding module and infrared receiving module；The outfan of described audio processing modules and
The input of infrared transmission module connects；The outfan of described Temperature Humidity Sensor and the input of temperature-humidity signal modulation module
Connect；The input of the outfan of described temperature-humidity signal modulation module and described infrared transmission module connects；Described infrared
The input of the outfan and relay forwarding module of penetrating module connects；The outfan of described relay forwarding module and infrared receiving
The input of block connects；Wherein：
Described audio processing modules are used for being filtered voice signal and amplify amplitude limit, and are added to and are made up of time base circuit
Frequency modulation circuit carry out frequency modulation(PFM)；
Described Temperature Humidity Sensor is used for detecting the humiture of environment and being sent to humiture digital signal modulated module；
Described infrared transmission module is coupled to audio processing modules, infrared for carrying out the data signal after frequency modulation(PFM)
Send；
Described relay forwarding module connects described infrared transmission module and described infrared receiving module, infrared logical for extending
Communication distance；
Described infrared receiving module includes infrared receiving circuit, single-chip microcomputer, band filter and temperature humidity display；Described
Infrared receiving circuit connects described single-chip microcomputer, and described single-chip microcomputer connects described band filter and temperature humidity display respectively；Institute
State infrared receiving circuit for receiving the infrared signal of relay forwarding module transmission；Infrared receiving circuit is sent by described single-chip microcomputer
The infrared signal come carries out frequency demodulation according to NEC agreement；Voice after described band filter is used for demodulating single-chip microcomputer is believed
Number filtering reduction；Described temperature humidity display is used for display environment humiture.
Further, described infrared voice data transmission communication system also includes power module, described power module bag
Include voltage converter and linear voltage regulator；The supply voltage of input is converted to analog voltage amplitude and divides by described voltage converter
Gei audio processing modules, infrared transmission module, relay forwarding module and infrared receiving module not power；Described linear voltage regulator is even
Connect described electric pressure converter, for stabilized supply voltage.
Further, described audio-frequency signal processing module includes microphone, signal processor and the PWM being sequentially connected
Module；Described microphone is used for obtaining voice signal；Voice signal is changed into binary digital signal by described signal processor；
Described PWM module is used for binary digital signal being carried out with pulse width modulation and connecting described infrared transmission module.
Further, the time base circuit model NE555 time base circuit agitator in described infrared transmission module.
Further, described infrared transmission module also includes infrared transmitting circuit；Described infrared transmitting circuit block includes electricity
Resistance R1, resistance R2, audion VT1, infrarede emitting diode LED, NAND gate modules A and NAND gate module B；One end of resistance R1
Connect power module, the positive pole of another termination infrarede emitting diode LED, the negative pole of described infrarede emitting diode LED connects three
The colelctor electrode of pole pipe VT1, the grounded emitter of audion VT1, one end of the base stage connecting resistance R2 of audion VT1, NAND gate mould
Block A connects NAND gate module B, and NAND gate module B connects the other end of resistance R2.
Further, the model PH202 infrarede emitting diode of described infrarede emitting diode LED, described NAND gate
The model of modules A and NAND gate module B is SN74LS00 tetra- tunnel two input nand gate circuit.
Further, described infrared voice data transmission communication system also includes key circuit, and described key circuit is even
Connect described single-chip microcomputer, for controlling the generation of infrared signal.
Further, described linear voltage regulator adopts the OLC linear voltage regulator of 5V.
In sum, due to employing technique scheme, the invention has the beneficial effects as follows：
(1) a kind of infrared voice data transmission communication system of the present invention, using infrared transmission module and infrared receiver
Module as transceiving device, for directional transmissions voice signal, and can the ambient temperature of real-time Transmission transmitting terminal and humidity so that
Voice signal and digital signal can simultaneous transmission, and transmission range is more than 4m.Wherein, infrared transmitting circuit adopts common emitter
Amplifying circuit, adjust base bias, input analogue signal through overvoltage and power amplification, the output work of infrarede emitting diode
Rate changes also with analogue signal, thus voice signal and humiture are sent, realizes long-distance transmissions, using this side
Method is simple, convenient.
(2) a kind of infrared voice data transmission communication system signal transmission of the present invention is normal, undistorted, ambient temperature
Transmission maximum error is 0.1 DEG C, and the system is compared with the past, and structure is more succinct, and debugging is convenient, and can obtain more excellent work
Performance, also can improve capacity of resisting disturbance and the reliability of system simultaneously.
(3) by the forwarding of trunk module, so that infrared signal is inputted and can isolate transmission with outlet chamber, enhance the system
Capacity of resisting disturbance, and extend the transmission range of infrared communication；Powered using power module, energy consumption is extremely low, stability is strong, use
Time is long, and radiation, less than one of the percentage of international standard, does not have co-channel interference and adjacent crosstalk.
【Brief description】
Fig. 1 is the general frame of the present invention；
Fig. 2 is the infrared transmitting circuit figure of the present invention.
【Specific embodiment】
With specific embodiment, the present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of infrared voice data transmits communication system, including audio processing modules, temperature and humidity sensing
Device, temperature-humidity signal modulation module, infrared transmission module, relay forwarding module and infrared receiving module；Described Audio Processing mould
The input of the outfan of block and infrared transmission module connects；The outfan of described Temperature Humidity Sensor and temperature-humidity signal modulation
The input of module connects；The input of the outfan of described temperature-humidity signal modulation module and described infrared transmission module is even
Connect；The input of the outfan of described infrared transmission module and relay forwarding module connects；The output of described relay forwarding module
The input of end and infrared receiving module connects；Wherein：
Described audio processing modules are used for being filtered voice signal and amplify amplitude limit, and are added to and are made up of time base circuit
Frequency modulation circuit carry out frequency modulation(PFM)；
Described Temperature Humidity Sensor is used for detecting the humiture of environment and being sent to humiture digital signal modulated module；
Described infrared transmission module is coupled to audio processing modules, infrared for carrying out the data signal after frequency modulation(PFM)
Send；
Described relay forwarding module connects described infrared transmission module and described infrared receiving module, infrared logical for extending
Communication distance；
Described infrared receiving module includes infrared receiving circuit, single-chip microcomputer, band filter and temperature humidity display；Described
Infrared receiving circuit connects described single-chip microcomputer, and described single-chip microcomputer connects described band filter and temperature humidity display respectively；Institute
State infrared receiving circuit for receiving the infrared signal of relay forwarding module transmission；Infrared receiving circuit is sent by described single-chip microcomputer
The infrared signal come carries out frequency demodulation according to NEC agreement；Voice after described band filter is used for demodulating single-chip microcomputer is believed
Number filtering reduction；Described temperature humidity display is used for display environment humiture.
The voice signal of the present invention is sent by infrared transmission module after pulsewidth modulation, and temperature-humidity signal is through temperature-humidity signal
Also sent out by infrared module after modulation module modulation；By the distance of relay forwarding module expanding communication, then through infrared receiver
Module receives to reduce signal filtering.The present invention, by the use of infrared transmission module and infrared receiving module as transceiving device, uses
Carry out directional transmissions voice signal, and can the ambient temperature of real-time Transmission transmitting terminal and humidity so that voice signal and digital signal
Being capable of simultaneous transmission.In the present embodiment, PMW modulation module adopts special PWM controller TL494.Can be made using this integrated circuit
System is more succinct, and obtains more excellent service behaviour, also can improve capacity of resisting disturbance and the reliability of system simultaneously.
The relay forwarding module of the present invention, for connecting this two different moulds of infrared transmission module and infrared receiving module
Block,.Infrared signal input and outlet chamber electrical isolation, realize the isolation transmission of infrared signal, can strengthen the anti-dry of whole system
Disturb ability, and there is the function of the communication distance of extension infrared signal.Described relay forwarding module can arrange one or more,
To extend different transmission ranges.In order to reduce the supply current of electric power system as far as possible, reduce power consumption, reduce relay forwarding mould
Block complexity, trunk module is powered only with a 5V single supply；Meanwhile, in the case of ensureing that transmission signal is normal, increase
The size of relay forwarding modular power load, further up to the purpose reducing electric current.
The band filter of the present invention adopts LC passive bandpass filters, and its lowpass frequency upper limit is 20.8kHz.Select electricity
The size held is relevant with the smooth degree of passband and waveform.Show by considering and through actual test, using above-mentioned ginseng
During number design, its waveform output situation is optimal.The present invention is demodulated to infrared signal using single-chip microcomputer, and single-chip microcomputer first will be red
The infrared signal that outer receiving circuit sends carries out analog digital conversion, then will be using impulse modulation by NEC infrared coding agreement
Infrared signal be decoded, only need to take 1 I/O mouth with chip microcontroller demodulation function, save the I/O mouth of single-chip microcomputer
Resource, also can achieve and demodulates to infrared signal frequency from motion tracking, greatly improve the accuracy of transmission, use chip microcontroller solution
Conditioning function can simplify circuit design, reduces board area, reduces system cost.
As one kind preferably, described infrared voice data transmission communication system also includes power module, described power supply mould
Block includes voltage converter and linear voltage regulator；Described linear voltage regulator connects described electric pressure converter；Described voltage converter
By input voltage conversion be analog voltage amplitude and respectively to audio processing modules, Temperature Humidity Sensor, infrared transmission module,
Relay forwarding module and infrared receiving module are powered, and such design can increase the driving force of power supply, realizes voltage signal
Long-distance transmissions；Reduce the energy consumption of power supply, extend use time.Voltage due to being branched away with voltage converter is unstable
, therefore described linear voltage regulator is used for stabilized supply voltage, can automatically maintain constant voltage, adopts 5V's in the present embodiment
OLC linear voltage regulator, to reduce carrier-in-interference, drastically increases signal to noise ratio.
As one kind preferably, described audio-frequency signal processing module includes microphone, signal processor and the PWM being sequentially connected
Modulation module；Described microphone is used for obtaining voice signal；Voice signal is changed into binary digit by described signal processor
Signal；Described PWM module is used for binary digital signal being carried out with pulse width modulation and connecting described infrared emission mould
Block.PWM is the amplitudes different by primary signal, after the numeral output of microprocessor is processed, exports in proportion not
Same PWM ripple.The PWM module of the present invention is modulated to voice signal using TL494, and TL494 has been internally integrated one
Agitator, a trigger, two comparators and two error amplifiers.
In order that infrared signal can correctly send out and transmit farther, the present invention is in PWM module
Encoded signal outfan adds a high-frequency carrier signal.By the modulation of carrier signal, the useful information of encoded signal is taken
Lead out, the transmitting range of such signal just can be longer, and can be effectively prevented from disturbing.As one kind preferably, the present invention is red
Model NE555 time base circuit agitator selected by time base circuit in emission module, and each parameter designing all can be according to its typical case
Application circuit is being selected.It is the carrier wave arteries and veins of 38KHz by 555 time base circuits and the suitable peripheral cell component frequency of selection
Rush agitator.By adjusting the resistance of slide-changing resistor, the carrier signal making 555 outfan be output as 38KHz can be adjusted.
As shown in Fig. 2 the infrared transmission module of the present invention also includes infrared transmitting circuit；Described infrared transmitting circuit block bag
Include resistance R1, resistance R2, audion VT1, infrarede emitting diode LED, NAND gate module 1 and NAND gate module 2；Resistance R1's
One termination power module Vcc, the positive pole of another termination infrarede emitting diode LED, the negative pole of described infrarede emitting diode LED
The colelctor electrode of connecting triode VT1, the grounded emitter of audion VT1, one end of the base stage connecting resistance R2 of audion VT1, with
Not gate modules A connects NAND gate module B, and not gate module B connects the other end of resistance R2.Infrared transmitting circuit is one and launches altogether
The amplifying circuit of pole, adjusts base bias, input analogue signal is through overvoltage and power amplification, described infrarede emitting diode
The output of LED changes also with analogue signal, and infrared transmitting circuit is by the carrier wave modulating by being driven by audion VT1
Dynamic infrarede emitting diode LED emission is gone out, it is possible to achieve long-distance transmissions, very simple and convenient using this design operation.
The NAND gate circuit being composed in series by audion VT1 and two NAND gate modules (A and B), has the effect of rectification, can eliminate
The level producing in concatenation deviates, and improves carrying load ability.Wherein, the model of described infrarede emitting diode LED1
PH202 infrarede emitting diode, the audion VT1 in described infrared receiving circuit is NPN triode, described NAND gate modules A
It is SN74LS00 tetra- tunnel two input nand gate circuit with the model of NAND gate module B.
The present invention to control the generation of infrared carrier wave signal using a key circuit, and wherein button is set to 8, be K0 extremely
K7, and it is respectively connected to P1.0 to the P1.8 mouth of single-chip microcomputer.Corresponding infrared emission frequency be respectively be respectively 300Hz, 600Hz,
900Hz, 1200Hz, 1500Hz, 1800Hz, 2100Hz and 2400Hz.
A kind of present invention infrared voice data transmit communication system operation principle be：In audio processing modules, institute
State microphone and the voice signal of acquisition is sent to described signal processor, voice signal is changed into two by described signal processor
Binary digits signal；Described PWM module is used for binary digital signal is modulated.Described Temperature Humidity Sensor will be examined
The ambient temperature and humidity signal measuring is sent to humiture digital signal modulated module, by described humiture digital signal modulated module
The temperature-humidity signal of simulation is converted to digital temperature-humidity signal.By the voice signal after modulation and digital temperature-humidity signal difference
Pass to described infrared transmission module, described infrared transmitting circuit produces the pulse train of 38kHz as carrier signal and by red
UV light-emitting diode LED to the infrared beam of emission 950nm, described infrared transmitting circuit block include resistance R1, resistance R2, three
Pole pipe VT1, infrarede emitting diode LED, NAND gate module 1 and NAND gate module 2.In order to extend transmission distance and strengthen whole
The capacity of resisting disturbance of system, described infrared transmission module passes through a relay forwarding module and connects described infrared receiving module, described
The light pulse receiving is converted into the signal of telecommunication by infrared receiving circuit, and infrared signal is carried out by described single-chip microcomputer according to NEC agreement
Frequency demodulation, wherein said voice signal pass through LC passive bandpass filters, be filtered wait process after be sent to speaker.
The circuit of this programme is more succinct, and debugs conveniently, and cost is relatively low, is transmitted using infrared communication system,
And mutually increased infrared relay forwarding module than ever, signal transmitting, reception, relay forwarding circuit are all real using resolution element
Existing, mutually than ever by the way of integrated transporting discharging realization, greatly save cost.Increase transmission range, reduce whole system
The power consumption of system.Driving force is strong, can work at high frequencies, long transmission distance；And cost is relatively low, using infrared light it is
Transport vehicle completes being wirelessly transferred of voice.This communications system transmission speed is fast, and interference is little, and reliability is high, is suitable for multiple near
Distance wireless communication occasion uses, and the voice teaching system in such as classroom, family room, library, hospital etc., in electronic product
In there is extensive development potentiality.
It is more than the detailed description for the preferable possible embodiments of the present invention, but embodiment is not limited to the present invention's
Patent claim, the equal change being completed under the technical spirit suggested by all present invention or modification change, all should belong to this
Invent covered patent model.
Claims (8)
1. a kind of infrared voice data transmission communication system it is characterised in that：Including audio processing modules, temperature and humidity sensing
Device, temperature-humidity signal modulation module, infrared transmission module, relay forwarding module and infrared receiving module；Described Audio Processing mould
The input of the outfan of block and infrared transmission module connects；The outfan of described Temperature Humidity Sensor and temperature-humidity signal modulation
The input of module connects；The input of the outfan of described temperature-humidity signal modulation module and described infrared transmission module is even
Connect；The input of the outfan of described infrared transmission module and relay forwarding module connects；The output of described relay forwarding module
The input of end and infrared receiving module connects；Wherein：
Described audio processing modules are used for being filtered and amplify amplitude limit by voice signal, and are added to the frequency being made up of time base circuit
Rate modulation circuit carries out frequency modulation(PFM)；
Described Temperature Humidity Sensor is used for detecting the humiture of environment and being sent to humiture digital signal modulated module；
Described infrared transmission module is coupled to audio processing modules, for the data signal after frequency modulation(PFM) is carried out infrared
Send；
Described relay forwarding module connects described infrared transmission module and described infrared receiving module, for extend infrared communication away from
From；
Described infrared receiving module includes infrared receiving circuit, single-chip microcomputer, band filter and temperature humidity display；Described infrared
Receiving circuit connects described single-chip microcomputer, and described single-chip microcomputer connects described band filter and temperature humidity display respectively；Described red
Outer receiving circuit is used for receiving the infrared signal of relay forwarding module transmission；Infrared receiving circuit is sent by described single-chip microcomputer
Infrared signal carries out frequency demodulation according to NEC agreement；Voice signal after described band filter is used for demodulating single-chip microcomputer is filtered
Ripple reduces；Described temperature humidity display is used for display environment humiture.
2. a kind of infrared voice data transmission communication system according to claim 1 it is characterised in that：Also include power supply
Module, described power module includes voltage converter and linear voltage regulator；The supply voltage of input is turned by described voltage converter
It is changed to analog voltage amplitude and respectively to audio processing modules, infrared transmission module, relay forwarding module and infrared receiving module
Power supply；Described linear voltage regulator connects described electric pressure converter, for stabilized supply voltage.
3. a kind of infrared voice data transmission communication system according to claim 1 it is characterised in that：Described audio frequency letter
Number processing module includes microphone, signal processor and the PWM module being sequentially connected；Described microphone is used for obtaining voice
Signal；Voice signal is changed into binary digital signal by described signal processor；Described PWM module is used for binary system
Digital signal carries out pulse width modulation and connects described infrared transmission module.
4. a kind of infrared voice data transmission communication system according to claim 1 it is characterised in that：Described infrared
Penetrate the time base circuit model NE555 time base circuit agitator in module.
5. a kind of infrared voice data transmission communication system according to claim 1 it is characterised in that：Described infrared
Penetrate module and also include infrared transmitting circuit；Described infrared transmitting circuit block include resistance R1, resistance R2, audion VT1, infrared
Optical diode LED, NAND gate modules A and NAND gate module B；The one termination power module of resistance R1, another termination infraluminescence
The positive pole of diode (LED), the colelctor electrode of the negative pole connecting triode VT1 of described infrarede emitting diode LED, audion VT1's
Grounded emitter, one end of the base stage connecting resistance R2 of audion VT1, NAND gate modules A connects NAND gate module B, NAND gate mould
Block B connects the other end of resistance R2.
6. a kind of infrared voice data transmission communication system according to claim 5 it is characterised in that：Described infrared
The model PH202 infrarede emitting diode of optical diode LED, the model of described NAND gate modules A and NAND gate module B is
SN74LS00 tetra- tunnel two input nand gate circuit.
7. a kind of infrared voice data transmission communication system according to claim 1 it is characterised in that：Also include button
Circuit, described key circuit connects described single-chip microcomputer, for controlling the generation of infrared signal.
8. a kind of infrared voice data transmission communication system according to claim 2 it is characterised in that：Described linearly steady
Depressor adopts the OLC linear voltage regulator of 5V.
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| CN201610838522.8A CN106411411A (en) | 2016-09-21 | 2016-09-21 | Infrared voice and data transmission communication system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109124580A (en) * | 2018-07-31 | 2019-01-04 | 佛山市苔藓云链科技有限公司 | The shared remote control medical device of one kind |
| CN109374965A (en) * | 2018-09-25 | 2019-02-22 | 深圳市思达仪表有限公司 | A kind of list infrared diode telecommunication circuit |
| CN117424644A (en) * | 2023-12-18 | 2024-01-19 | 中国科学院长春光学精密机械与物理研究所 | Indoor voice transmission device based on infrared transmission protocol |
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Application publication date: 20170215 |