CN209118486U - A kind of simple digital control infrared communications set - Google Patents
A kind of simple digital control infrared communications set Download PDFInfo
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- CN209118486U CN209118486U CN201821635430.0U CN201821635430U CN209118486U CN 209118486 U CN209118486 U CN 209118486U CN 201821635430 U CN201821635430 U CN 201821635430U CN 209118486 U CN209118486 U CN 209118486U
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Abstract
A kind of simple digital control infrared communications set, including power supply module, infrared transmission module, infrared receiving module, transit module and digital control module, the power supply module is made of LM317 regulated power supply voltage stabilizing chip, the infrared transmission module is by speed signal processing circuit, infrared light emission circuit and temperature sensing circuit are constituted, the infrared receiving module is by mid-infrared optical receiving circuit, voice filter circuit, audio power amplifying circuit and display circuit are constituted, the transit module is made of infrared receiver driving circuit and infrared transmitter driving circuit, the output end of the power supply module and the input terminal of digital control module are electrically connected, the infrared transmission module, the input terminal of infrared receiving module and transit module is electrically connected with the output end of digital control module.This simple digital control infrared communications set can be realized accurate receiving, transmission and the display for realizing voice signal, have the advantages that long transmission distance, noise are small and low in energy consumption.
Description
Technical field
The utility model relates to electronic measuring technology fields, and in particular to a kind of simple digital control infrared communications set.
Background technique
Infrared communication has the characteristics that control is simple, easy to implement, transmission reliability is high, is a kind of more common communication
Mode, its application is very extensive, for example is applied to infrared thermal imagery, infrared photography, infrared spectrometer and infrared sensor
Etc..It is realized in the hardware circuit of infrared communication system, forms infrared communication system by using discrete component on the market,
Although program structure is simple, is easy to make and at low cost, and audio signal can directly be carried out by infraluminescence pipe it is former
Code transmission, will not cause audio signal to be distorted because of delay, the disadvantage is that the program is unable to the multiple signals such as simultaneous transmission temperature,
And vulnerable to interference；Also there is product using two-way infrared communication, the program is separately designed in transmitter and receiver for digital signal
With the circuit of analog signal transmitting, launch two kinds of different infrared signals of frequency there are two different infrared transmitting tubes, it is this
The superposition that modulus signal is realized by the superposition of optical signal is dexterously utilized in mode, avoids brought by circuit signal superposition
Signal interference problem realizes the real-time Transmission of analog and digital signal；The disadvantage is that structure is complicated for the program, it is at high cost.
In infrared communication system in modulation system selection, have product using FM modulation system, the modulation system have compared with
High noise resisting ability, but generally require phase-locked loop modulation, it is contemplated that infrared emission carrier wave is generally not more than 38kHz, if made
It is modulated with FM, frequency deviation will very little, it is difficult to demodulate；Also there is product using PPM modulation mode, which has more bloom
Power utilization and band efficiency, but infrared light-emitting diode cannot within 100% period full power operation, it is real after tested
It is 35kHz that the highest for testing the existing infrared tube in room, which sends frequency, sends voice according to impulse modulation, rate is relatively difficult to guarantee.
Therefore a kind of at low cost, strong interference immunity is needed, stable and easy to accomplish simple digital control infrared logical of performance
T unit.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide that a kind of cost performance is high, anti-interference
Strong and stable performance simple digital control infrared communications set.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of simple digital control infrared communications set, including power supply module, infrared transmission module, infrared receiving module,
Transit module and digital control module, the power supply module are made of LM317 regulated power supply voltage stabilizing chip, the infrared hair
It penetrates module to be made of speed signal processing circuit, infrared light emission circuit and temperature sensing circuit, the infrared receiving module
Be made of mid-infrared optical receiving circuit, voice filter circuit, audio power amplifying circuit and display circuit, the transit module by
Infrared receiver driving circuit and infrared transmitter driving circuit are constituted, and the digital control module is by embedded chip STM32L151
It constitutes, the input terminal of the output end of the power supply module and digital control module is electrically connected, the infrared transmission module, infrared
The input terminal of receiving module and transit module is electrically connected with the output end of digital control module.
It is as above-mentioned technical proposal to further describe:
The input terminal of the infrared transmission module is also electrically connected with the output end of voice input signal.
It is as above-mentioned technical proposal to further describe:
The output end of the infrared transmission module and the input terminal of transit module are electrically connected.
It is as above-mentioned technical proposal to further describe:
The output end of the transit module and the input terminal of infrared receiving module are electrically connected.
The beneficial effects of the utility model are as follows:
Originally simple digital control infrared communications set can be realized the accurate receiving for realizing voice signal, transmission and show
Show there is that long transmission distance, noise are small and low in energy consumption, whole system is carried out using low-power consumption, low cost monolithic machine
Data control, flexibility ratio is high, performance is stablized, and bursts the theory of human oriented design to a greater extent.
Detailed description of the invention
Fig. 1 is a kind of structure connection diagram of simple digital control infrared communications set of the utility model；
Fig. 2 is the circuit diagram of power supply module in the utility model；
Fig. 3 is the circuit diagram of digital control module in the utility model；
Fig. 4 is the circuit diagram of speed signal processing circuit in the utility model；
Fig. 5 is the circuit diagram of the utility model mid-infrared light transmit circuit；
Fig. 6 is the circuit diagram of transit module in the utility model；
Fig. 7 is the circuit diagram that the utility model mid-infrared light receives circuit；
Fig. 8 is the circuit diagram of voice filter circuit in the utility model；
Fig. 9 is the circuit diagram of the utility model sound intermediate frequency power amplification circuit.
Marginal data:
1- power supply module equipment, 2- infrared transmission module equipment, 3- infrared receiving block device, 4- transit module equipment,
5- numerical control device.
Specific embodiment
Referring to Fig. 1-9, a kind of simple digital control infrared communications set, including it is power supply module 1, infrared transmission module 2, red
Outer receiving module 3, transit module 4 and digital control module 5, power supply module 1 are made of LM317 regulated power supply voltage stabilizing chip,
Infrared transmission module 2 is made of speed signal processing circuit, infrared light emission circuit and temperature sensing circuit, infrared receiving
Block 3 is made of mid-infrared optical receiving circuit, voice filter circuit, audio power amplifying circuit and display circuit, transit module 4 by
Infrared receiver and infrared transmitter driving circuit are constituted, and digital control module 5 is made of embedded chip STM32L151, mould of powering
The input terminal of the output end of block 1 and digital control module 5 is electrically connected, infrared transmission module 2, infrared receiving module 3 and in
The input terminal of revolving die block 4 is electrically connected with the output end of digital control module 5.
The input terminal of infrared transmission module 2 is also electrically connected with the output end of voice input signal, infrared transmission module 2
Output end and the input terminal of transit module 4 be electrically connected, the input terminal of the output end of transit module 4 and infrared receiving module 3
It is electrically connected.
In the present embodiment, referring to fig. 2, in the power-supplying circuit of power supply module 1, power supply power supply is mainly by+5V power supply
Circuit composition, power-supplying circuit use LM317 regulated power supply voltage stabilizing chip, are the voltage reference of 1.25V between 1,2 feet,
For the output performance for guaranteeing power supply circuit, the R2 value in Fig. 2 should be less than 240 Ω, and in the present embodiment, R2 value is 220 Ω,
Output voltage values can be adjusted by changing R3 resistance value, two in Fig. 2 diode D1 and D3 are for protecting LM317 adjustable electric
Source voltage stabilizing chip prevents the damage caused by chip under short-circuit conditions, referring to Fig. 3, in the digital control module 5,
Systems control division point is handled using STM32L151 single-chip microcontroller, and hardware circuit mainly includes Peripheral clock circuit, resets electricity
The circuits such as road, power supply, jtag interface and universal I/O port.
In the present embodiment, referring to fig. 4, infrared transmission module 2 include speed signal processing circuit, infrared light emission circuit with
And temperature sensing circuit, due to needing to improve it to meet the defeated of ADC before carrying out A/D conversion to voice signal
Enter range, and being filtered purifies its signal, eliminates interference, therefore, devises the three active filters of rank Butterworth herein
Wave device carries out anti-aliasing filter, and operational amplifier is recycled to carry out adjustable amplification and level boost to signal, turns for subsequent A/D
It is exchanged with sufficient preparation.
In the present embodiment, referring to Fig. 5, infrared transmitting circuit is by infrared light emission pipe, triode, adjustable resistance and capacitance group
At the circuit is the basic total radio amplifier being made of NPN type triode 8050, and wherein load resistance R16 is by the collection of variation
Electrode current is converted to voltage output, and the minimum resistance value for calculating collector load resistor R16 is design infrared light emission circuit
It is crucial.
In the present embodiment, referring to Fig. 6, transit module 4 is made of infrared receiver and infrared transmitter driving circuit, infrared receiver
Pipe receives signal that emitter launches after treatment, accesses MSP430 single-chip microcontroller, MSP430 single-chip microcontroller is to the number
According to period differentiation is carried out, with debug signal, then send by I/O mouthfuls of output PWM waves, then by infrared transmitting tube.
In the present embodiment, referring to Fig. 7, infrared receiving module 3 includes mid-infrared optical receiving circuit, voice filter circuit, audio
Power amplification circuit and display circuit, since the infrared signal received is very faint, it is therefore desirable to be amplified to signal
Processing, in order to accurately detect the pulsewidth of signal, the utility model devises hysteresis comparator and carries out shaping to signal, infrared
Circuit is received to be made of amplifying circuit and comparison circuit.
In the present embodiment, referring to Fig. 8, the audio signal of voice filter circuit passes through active band-pass filter by DA output,
This bandpass filter is made of the active low pass Butterworth filter of three ranks and the active high pass Butterworth filter of three ranks.
In the present embodiment, referring to Fig. 9, audio power amplifying circuit uses integrated power amplifier LM386, it is one
Single supply powered audio power amplifier, inside introduce depth series voltage negtive backword, and entire circuit is made to have stable voltage gain,
Voltage amplification factor is determined that, wherein adjusting resistance R22 is volume controller, adjusting it can control the size of volume by R12；
C29 is capacitance, prevents influence of the LM386 DC potential of rear class to prime tone circuit；Resistance R23's and capacitor C31
Effect is to prevent amplifier from generating low frequency self-excitation；The effect of C19 can determine power amplifier lower frequency limit, because of output signal ratio
Relatively strong, in order to ensure lower frequency limit is relatively low, C19 is typically chosen bigger electrolytic capacitor.
The utility model is mainly made of infrared transmission module 2, transit module 4 and 3 three parts of infrared receiving module.It is red
Outer communication device, using PWM modulation technology, Manchester's code mode, realizes voice and temperature letter using infrared light as carrier
Number real-time Transmission, while guaranteeing system stability, by using low energy-consumption electronic device, effectively control transmitting pulse duty factor
Equal measures, improve the efficiency of transit module 4, wherein realized using PWM modulation technology using the principle of infrared communication technology,
From Optimal Signals transmission of angle in design, infrared communication circuit is devised, keeps the signal of transmission real-time in each circuit
Synchronous transfer, and strong interference immunity.
In addition, the utility model can be realized the sinusoidal signal in input 800Hz, reception device through lot of experiment validation
Output voltage virtual value when being not less than 0.4V, transmission range between infrared light emission circuit and mid-infrared optical receiving circuit is maximum
For 4m；When reducing the amplitude of transmitting terminal input signal to 0V, the noise voltage of reception device output is less than 40mV；Circuit is maximum
Supply current is no more than 20mA.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (4)
1. a kind of simple digital control infrared communications set, including power supply module (1), infrared transmission module (2), infrared receiving
Block (3), transit module (4) and digital control module (5), which is characterized in that the power supply module (1) is by LM317 adjustable electric
Source voltage stabilizing chip is constituted, and the infrared transmission module (2) is examined by speed signal processing circuit, infrared light emission circuit and temperature
Slowdown monitoring circuit is constituted, and the infrared receiving module (3) is by mid-infrared optical receiving circuit, voice filter circuit, audio power amplifying circuit
And display circuit is constituted, the transit module (4) is made of infrared receiver driving circuit and infrared transmitter driving circuit, described
Digital control module (5) is made of embedded chip STM32L151, the output end and digital control mould of the power supply module (1)
The input terminal of block (5) is electrically connected, the infrared transmission module (2), infrared receiving module (3) and transit module (4) it is defeated
Enter end to be electrically connected with the output end of digital control module (5).
2. a kind of simple digital control infrared communications set according to claim 1, it is characterised in that: the infrared emission
The input terminal of module (2) is also electrically connected with the output end of voice input signal.
3. a kind of simple digital control infrared communications set according to claim 1, it is characterised in that: the infrared emission
The output end of module (2) and the input terminal of transit module (4) are electrically connected.
4. a kind of simple digital control infrared communications set according to claim 1, it is characterised in that: the transit module
(4) input terminal of output end and infrared receiving module (3) is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635430.0U CN209118486U (en) | 2018-10-09 | 2018-10-09 | A kind of simple digital control infrared communications set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635430.0U CN209118486U (en) | 2018-10-09 | 2018-10-09 | A kind of simple digital control infrared communications set |
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| CN209118486U true CN209118486U (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838875A (en) * | 2019-11-13 | 2020-02-25 | 佛山科学技术学院 | Infrared-based audio communication system |
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2018
- 2018-10-09 CN CN201821635430.0U patent/CN209118486U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838875A (en) * | 2019-11-13 | 2020-02-25 | 佛山科学技术学院 | Infrared-based audio communication system |
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