CN201060549Y - Anti-interference infrared remote controller - Google Patents
Anti-interference infrared remote controller Download PDFInfo
- Publication number
- CN201060549Y CN201060549Y CNU200720109404XU CN200720109404U CN201060549Y CN 201060549 Y CN201060549 Y CN 201060549Y CN U200720109404X U CNU200720109404X U CN U200720109404XU CN 200720109404 U CN200720109404 U CN 200720109404U CN 201060549 Y CN201060549 Y CN 201060549Y
- Authority
- CN
- China
- Prior art keywords
- infrared
- signal
- data
- circuit
- cpu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an anti-jamming infrared remote controller which consists of an infrared transmitting circuit, an infrared receiving circuit, a micro controller and a peripheral circuit; wherein, the micro controller adopts SST89E554RC; the infrared transmitting circuit transmits the signal which is sent by the micro controller to the base electrode of a diode Q4 in one channel, and another channel passes through a carrier wave pulse generator; the carrier wave pulse generator is controlled by the data signal of the micro controller to form a data-based synchronous pulse signal which is exported to the base electrode of the diode Q4; the two channels of signal jointly drive the Q4, and are sent out via an infrared transmitting tube D1; the infrared receiving circuit includes an integrated infrared receiver; the output of pulse signal is connected with a diode Q1 and pre-amplified by the diode Q1; Q2 and Q3 extract clock and data which are transmitted to the micro controller, thereby resolving the anti-jamming problem of the remote controller. The utility model has the advantage of strong anti-jamming ability, and can be widely applicable in industries and the life control fields.
Description
Technical field
The utility model 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 utility model 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 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.
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 utility model is described in further detail.
The utility model embodiment
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 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.
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 I
2The requirement of C 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 PO.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. an 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 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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720109404XU CN201060549Y (en) | 2007-05-16 | 2007-05-16 | Anti-interference infrared remote controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720109404XU CN201060549Y (en) | 2007-05-16 | 2007-05-16 | Anti-interference infrared remote controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201060549Y true CN201060549Y (en) | 2008-05-14 |
Family
ID=39409033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720109404XU Expired - Fee Related CN201060549Y (en) | 2007-05-16 | 2007-05-16 | Anti-interference infrared remote controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201060549Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005113A (en) * | 2010-11-11 | 2011-04-06 | 广东欧珀电子工业有限公司 | Anti-interference infrared remote control signal receiving circuit |
| WO2015143807A1 (en) * | 2014-03-28 | 2015-10-01 | 小米科技有限责任公司 | Infrared signal transmission method and device and remote controller |
| CN108169805A (en) * | 2017-12-12 | 2018-06-15 | 浙江众邦机电科技有限公司 | Cloth detection and its infrared sensor of application |
-
2007
- 2007-05-16 CN CNU200720109404XU patent/CN201060549Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005113A (en) * | 2010-11-11 | 2011-04-06 | 广东欧珀电子工业有限公司 | Anti-interference infrared remote control signal receiving circuit |
| WO2015143807A1 (en) * | 2014-03-28 | 2015-10-01 | 小米科技有限责任公司 | Infrared signal transmission method and device and remote controller |
| CN108169805A (en) * | 2017-12-12 | 2018-06-15 | 浙江众邦机电科技有限公司 | Cloth detection and its infrared sensor of application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100568738C (en) | The pulse-width modulation type optical fiber communication coding coding/decoding method and the circuit of band synchronised clock | |
| CN201060549Y (en) | Anti-interference infrared remote controller | |
| CN101067899A (en) | Antiinterference infrared remote control device | |
| CN105103459A (en) | System and method for low data-rate communication over a carrier current | |
| JPH05136744A (en) | Pulse modulation infrared ray data communication link | |
| JP3065919B2 (en) | FM modulation / demodulation system and FM modulator | |
| CN102394655B (en) | Manchester code converting method on MIC bus | |
| CN102545999A (en) | Infrared communication signal modulating and receiving method | |
| CN100438518C (en) | Radio communication coding and decoding method using variable length signal to express digital data | |
| CN104717036A (en) | Differential Manchester decoding circuit and system | |
| CN102098055A (en) | Data baud rate adaptive digital-analogue conversion device | |
| JPH1141300A (en) | System and device for modulation/demodulation | |
| CN203025931U (en) | Singlechip-based wireless encoding and decoding remote controller | |
| EP0786182B1 (en) | Coding for infrared signals | |
| CN201674524U (en) | Underground modulator-demodulator | |
| CN201965746U (en) | Remote control encoding circuit based on FPGA (Field Programmable Gate Array) | |
| CN101494507A (en) | Dipulse interval modulation method of wireless optical communication system | |
| JPH0823310A (en) | Optical signal transmitter | |
| CN203775182U (en) | RS232 and infrared communication interface switching circuit capable of automatically taking power | |
| CN108536625B (en) | Visible light communication transmission device and method based on USB2.0 interface | |
| CN102571209B (en) | Optical fiber communication device of laser marking control system and coding method | |
| CN102404051A (en) | Multichannel wireless optical bus device | |
| CN105553624A (en) | Predictable data communication code | |
| CN103840813A (en) | Self-powered RS232 and infrared communication interface switching circuit | |
| JPH02274139A (en) | Data transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20100516 |