CN101067899A - Antiinterference infrared remote control device - Google Patents

Antiinterference infrared remote control device Download PDF

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Publication number
CN101067899A
CN101067899A CN 200710068580 CN200710068580A CN101067899A CN 101067899 A CN101067899 A CN 101067899A CN 200710068580 CN200710068580 CN 200710068580 CN 200710068580 A CN200710068580 A CN 200710068580A CN 101067899 A CN101067899 A CN 101067899A
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CN
China
Prior art keywords
infrared
signal
microcontroller
circuit
cpu
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Pending
Application number
CN 200710068580
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Chinese (zh)
Inventor
周华鹏
Original Assignee
周华鹏
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Application filed by 周华鹏 filed Critical 周华鹏
Priority to CN 200710068580 priority Critical patent/CN101067899A/en
Publication of CN101067899A publication Critical patent/CN101067899A/en
Pending legal-status Critical Current

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Abstract

This invention relates to an anti-interference infrared remote control device including an infrared transmission circuit, an infrared receiving circuit, a microcontroller and its surrounding circuit, in which, the microcontroller applies SST89E554RC, the infrared transmission circuit sends one part of signals sent by the microcontroller to the base of diode Q4 and the other part forms a synchronous pulse signal based on data and output to the base of diode Q4 by a sub-carrier pulse generator controlled by data signals of the microcontroller, and the two parts of signals are mixed to drive Q4 and transmitted by an infrared emission tube D1, and the infrared receiving circuit includes an integrated infrared receiver, the pulse signal output is connected with diode Q1 to finish pre-amplification, Q2 and Q3 separate clock and data sent to the microcontroller.

Description

A kind of anti-interference infrared remote controller
Technical field
The present invention relates to a kind of jamproof infrared remote controller.
Background technology
At present, general infrared remote control system is made up of infrared remote-controlled signal generator, infrared remote-controlled signal receiver and microcontroller and peripheral circuit thereof etc., remote control signal generator is used for producing the remote control coding pulse, drive infrared transmitting tube output infrared remote-controlled signal, receiver of remote-control sytem is finished amplification, detection, shaping to remote signal, is demodulated the remote control coding pulse.This remote control coding pulse is one group of group serial binary sign indicating number, and this serial code is input to microcontroller, is finished the telecommand decoding by its innernal CPU, and carries out corresponding straighforward operation.The weak point of its existence is, a little less than the antijamming capability.
Summary of the invention
Its purpose of the present invention just is to provide a kind of anti-interference infrared remote controller, has the strong characteristics of antijamming capability.
The technical scheme that realizes above-mentioned purpose and take comprises infrared transtation mission circuit, infrared receiving circuit and microcontroller and peripheral circuit thereof,
Microcontroller CPU adopts SST89E554RC;
The signal one tunnel that infrared transtation mission circuit sends microcontroller CPU P2 7 pins is delivered to the base stage of Q4, another road reaches one pair of carrier pulse generator that additional resistance capacitance forms by U11A74HC00 control by U11B and U11C, this pair carrier pulse generator is controlled by the data-signal of CPU, form one and output to the base stage of Q4 based on the data synchronization pulse signal, two paths of signals combination drive Q4 also sends by an infrared transmitting tube D1;
Infrared receiving circuit comprises integrated infrared remote receiver IR1, and pulse signal output P0 meets Q1, is finished in advance by Q1 and puts, and Q2, Q3 isolate clock and data, and clock signal is delivered to the interruption input pin INT0 of CPU, and data-signal send the P10 mouth of CPU.
Compared with prior art the present invention has the following advantages:
Because this device has adopted pulse signal and modulation signal mutual superposition are formed a synchronous/asynchronous modulation technique, and the receiving circuit demoder demodulates remote control pulse and enable signal with the input signal homophase, thereby have the better resisting interference performance.
Description of drawings
Accompanying drawing 1 is this device circuit structural principle block diagram;
Accompanying drawing 2 is this device microcontroller interface circuit structure theory diagram;
Accompanying drawing 3 installs infrared transtation mission circuit structural principle block diagram for this;
Accompanying drawing 4 is this device infrared receiving circuit structural principle block diagram.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
The embodiment of the invention
Comprise infrared transtation mission circuit, infrared receiving circuit and microcontroller and peripheral circuit thereof;
Microcontroller CPU adopts SST89E554RC, and its interface circuit as shown in Figure 2;
The signal one tunnel that infrared transtation mission circuit sends microcontroller CPU P2 7 pins is as shown in Figure 3 delivered to the base stage of Q4, another road reaches one pair of carrier pulse generator that additional resistance capacitance forms by U11A74HC00 control by U11B and U11C, this pair carrier pulse generator is controlled by the data-signal of CPU, form one and output to the base stage of Q4 based on the data synchronization pulse signal, two paths of signals combination drive Q4 also sends by an infrared transmitting tube D1;
Infrared receiving circuit comprises integrated infrared remote receiver IR1 as shown in Figure 4, and pulse signal output P0 meets Q1, is finished in advance by Q1 and puts, and Q2, Q3 isolate clock and data, and clock signal is delivered to the interruption input pin INT0 of CPU, and data-signal send the P10 mouth of CPU.
Its principle of work is;
Infrared communication is to utilize the medium of the infrared ray of 950nm near-infrared band as the information of transmission, i.e. communication channel.Transmitting terminal adopts pulse-time modulation (PPM) mode, and binary digital signal is modulated into the pulse train of a certain frequency, and drives infrared transmitting tube and send with the form of light pulse; The light arteries and veins that receiving end will receive converts electric signal to, carries out demodulation through giving demodulator circuit after the processing such as amplification, filtering again, exports after being reduced to binary digital signal.
In brief, the essence of infrared communication is carried out modulation and demodulation to binary digital signal exactly, so that utilize infrared channel to transmit; The infrared communication interface is exactly the modulator-demodular unit at infrared channel.
The circuit structure principle as shown in Figure 1, comprise infrared transtation mission circuit, infrared receiving circuit and microcontroller and peripheral circuit thereof, infrared transtation mission circuit has two and selects modulation synchronously and asynchronous signal automatically according to coded format, and pulse signal/modulation signal mutual superposition is formed a synchronous/asynchronous modulation; Infrared receiving circuit comprises preposition amplification, amplitude limit amplification, bandpass filtering, separated in synchronization, peak detection, enable detection and wave shaping, thereby demodulates and import the remote control pulse and the enable signal of remote signal homophase.
Infrared transtation mission circuit also comprises MCU data generating circuit and 1/2 voltage comparator circuit, through being connected modulator with adding circuit after relatively, drives infrared transmitting tube through amplifying circuit.
Infrared receiving circuit is after separated in synchronization, and one the tunnel meets MCU through synchrodata decoding and clock control circuit, and another road meets MCU through signal decoding circuit and control data generation circuit.
Infrared transtation mission circuit is that core is formed key scanning, coding and radiating circuit with CPU, and CPU produces the carrier signal of two a series impulses coding and a 38KHZ, drives infrared transmitting tube through adding circuit and amplifying circuit.
Infrared receiving circuit receives at least one described modulation-demodulation circuit asynchronous signal is decoded, and at least one described modulation-demodulation circuit is encoded to synchronizing signal; Be connected in the UART that is used for transmitting betwixt asynchronous signal between described bus and at least one the described asynchronous signal coded modulation detuner; Synchronous/asynchronous communication controler SACC, be connected between described bus and the described a plurality of modulator-demodular unit, be used between described bus and described asynchronous signal coded modulation detuner, transmitting asynchronous signal, and at described bus and described this synchronous signal transmission of synchronizing signal coded modulation detuner, described controller demodulates data-signal with synchronous and asynchronous coded format, and satisfies the requirement of I2C bus.
Comprise infrared transtation mission circuit, infrared receiving circuit and microcontroller and peripheral circuit thereof;
Microcontroller CPU adopts SST89E554RC;
Infrared receiving circuit adopts integrated infrared remote receiver finished product IR1, and receiver comprises infrared receiving tube and signal processing IC, all is integrated in the infrared remote receiver IR1.Receiver externally has only 3 pin: Vcc, GND and a pulse signal output P0.The positive source of Vcc welding system (+5V), and the ground wire of GND welding system, pulse signal output meets Q1, is finished in advance by Q1 and puts, and Q2, Q3 isolate clock and data, and clock signal is delivered to the interruption input pin INT0 of CPU, and data-signal send the P10 mouth of CPU.If there is not infrared remote-controlled signal to arrive, two output ports of receiver keep high level, when receiving infrared remote-controlled signal, the receiving device conversion of signals becomes pulse train (DATA) and synchronizing signal (CLK) to be added to interruption input and the data input pin of CPU.CPU timer T0, T1 are initialized as timer working method 1, the position, GATE position of T0, and T0 only counts during for high level at INT0 like this.Each external interrupt at first stops regularly, and the count value of record T0, T1 then with the counter O reset of T0, T1, and restarts regularly.The value of T0 is high level pulse, and the value of T1-T0 is a low-level pulse width.
Infrared transtation mission circuit is the signal (P27 pin) that microcontroller is sent, the pulsed frequency one tunnel of a 38K is delivered to the base stage of Q4, another road reaches additional resistance capacitance by U11A (74HC00) control by U11B and U11C and has formed one pair of carrier pulse generator, this pair carrier pulse generator is controlled by the data-signal of CPU, form one and output to the base stage of Q2 based on the data synchronization pulse signal, two paths of signals combination drive Q2 also sends by an infrared transmitting tube D1.

Claims (1)

1, a kind of anti-interference infrared remote controller comprises infrared transtation mission circuit, infrared receiving circuit and microcontroller and peripheral circuit thereof, it is characterized in that,
Microcontroller CPU adopts SST89E554RC;
The signal one tunnel that infrared transtation mission circuit sends microcontroller CPU P27 pin is delivered to the base stage of Q4, another road reaches one pair of carrier pulse generator that additional resistance capacitance forms by U11A74HC00 control by U11B and U11C, this pair carrier pulse generator is controlled by the data-signal of CPU, form one and output to the base stage of Q4 based on the data synchronization pulse signal, two paths of signals combination drive Q4 also sends by an infrared transmitting tube D1;
Infrared receiving circuit comprises integrated infrared remote receiver IR1, and pulse signal output PO meets Q1, is finished in advance by Q1 and puts, and Q2, Q3 isolate clock and data, and clock signal is delivered to the interruption input pin INT0 of CPU, and data-signal send the P10 mouth of CPU.
CN 200710068580 2007-05-16 2007-05-16 Antiinterference infrared remote control device Pending CN101067899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200710068580 CN101067899A (en) 2007-05-16 2007-05-16 Antiinterference infrared remote control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200710068580 CN101067899A (en) 2007-05-16 2007-05-16 Antiinterference infrared remote control device

Publications (1)

Publication Number Publication Date
CN101067899A true CN101067899A (en) 2007-11-07

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CN 200710068580 Pending CN101067899A (en) 2007-05-16 2007-05-16 Antiinterference infrared remote control device

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CN (1) CN101067899A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101814233A (en) * 2010-04-08 2010-08-25 郑州炜盛电子科技有限公司 Decoding method of infrared remote control software
CN101783067B (en) * 2009-01-16 2012-01-11 海洋王照明科技股份有限公司 Infrared remote control receiving circuit with electromagnetic interference resistance and implementation method thereof
CN103616837A (en) * 2013-12-04 2014-03-05 东莞美驰图实业有限公司 Low-cost method and circuit for resisting interference on remote control recording car
CN106131622A (en) * 2016-07-05 2016-11-16 曹燕红 A kind of intelligent video system based on Internet of Things

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101783067B (en) * 2009-01-16 2012-01-11 海洋王照明科技股份有限公司 Infrared remote control receiving circuit with electromagnetic interference resistance and implementation method thereof
CN101814233A (en) * 2010-04-08 2010-08-25 郑州炜盛电子科技有限公司 Decoding method of infrared remote control software
CN103616837A (en) * 2013-12-04 2014-03-05 东莞美驰图实业有限公司 Low-cost method and circuit for resisting interference on remote control recording car
CN103616837B (en) * 2013-12-04 2016-04-13 东莞美驰图实业有限公司 A kind of remote control record car mould anti-disturbance method of low cost
CN106131622A (en) * 2016-07-05 2016-11-16 曹燕红 A kind of intelligent video system based on Internet of Things

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