外文翻译---红外遥控及芯片介绍~

1、毕业设计外文翻译多红外遥控及芯片介绍学 院： 电气与电子工程学院 专 业： 电子信息工程 学生姓名： 学 号： 指导教师： 2021年6月Infrared Remote and Chips Are IntroducedPeople's eyes can see the visible wavelength from long to short according to the arrangement, in order to red, orange, yellow, green, green, blue, violet. One of the red wavelengths for 0

2、.62 0.76 moon m, Purple is 0.38 wavelength range moon m. Purple is shorter than the wavelength of light called ultraviolet ray, red wavelengths of light is longer than that of infrared light. Infrared remote control is to use wavelength for 0.76 1.5 moon m between the near infrared to transfer contr

3、ol signal.Commonly used infrared remote control system of general points transmit and receive two parts. The main component part for the launch of infrared light emitting diode. It is actually a special light emitting diode, due to its internal material differs from ordinary light emitting diode, re

4、sulting in its ends on certain voltage, it is a rather infrared light. Use of infrared light emitting diode the infrared wavelengths, for 940nm appearance and ordinary, just the same light emitting diode five different colors. Infrared light emitting diode generally have black and blue, transparent

5、three colors. Judgment of infrared light emitting diode and judgment method, using a millimeter to ordinary diode electric block measure of infrared light emitting diode, reverse resistance. The infrared light emitting diode luminescence efficiency to use special instrument to measure precise, and u

6、se only spare conditions to pull away from roughly judgment. Receiving part of infrared receiving tube is a photosensitive diode.In actual application of ire receiving diode to reverse bias, it can work normally, i.e., the infrared receiving circuit application in diode is used to reverse, higher se

7、nsitivity. Infrared receiving diode usually has two round and rectangular. Due to the power of infrared light emitting diode (or less commonly 100mW), so ire receiving diode received signals is weak, so will increase high-gain ones. The amplifier circuit.In common CX20106A, etc PC1373H moon infrared

8、 receiving special amplifier circuit. In recent years both amateur or formal products, mostly using infrared receiving head finished. The head of infrared receiving product packages generally has two kinds: one kind USES sheet shielding, A kind of plastic packaging. There are three pin, namely the p

9、ower is (VDD), power negative (GND) and data output (VO or OUT). Infrared receiving head foot arrangement for types varied, manufacturer's instructions. Finished the advantages of infrared receiving head is not in need of sophisticated debugging and shell screen, use rise as a transistor, very c

10、onvenient. But when used in the infrared receiving attention finished first carrier frequency.Infrared remote common carrier frequency for 38kHz, this is transmitted by using 455kHz Tao Zhen to decide. At the launch of crystals were integer frequency, frequency coefficients, so commonly 12, so 455kH

11、z ÷ 12 hundredth kHz 38kHz hundredth 379,000. Some remote control system adopts 36kHz, 56kHz, etc, general 40kHz launched by the crystals of oscillation frequency to decide.Infrared remote characteristic is not influence the surrounding environment and does not interfere with other electric equ

12、ipment. Due to its cannot penetrate walls, so the room can use common household appliance of remote control without mutual interference, Circuit testing is simple, as long as given circuit connection, generally does not need any commissioning can work, Decoding easily, can undertake multiple remote

13、control. Because each manufacturer produces a great deal of infrared remote application-specific integrated circuit, when need press diagram sue jib. Therefore, the infrared remote now in household appliances, indoor close (less than 10 meters) in the remote control is widely used.Multiple infrared

14、remote control system of infrared emission control buttons, there are many parts general representative of different control function. When pressed a button, correspondingly in the receiver with different output.Receiving the output state can be roughly divided into pulse, level, self-locking and in

15、terlock, data five forms. "The pulse output is according to launch" when the button, the receiver output terminals output corresponding "effective", a pulse width 100ms in general. "Level" refers to the output launch press button, the receiver output corresponding outpu

16、t level ", "effective transmit to loosen the receiver" level "disappears. This "effective pulse" and "effective", may be of high level is low, and may also depend on the output corresponding static state, such as feet for low, static "high" for effec

17、tive, As for the static, "low" high effective. In most cases, "high" for effective. "Since the lock" refers to launch the output of each time you press the button, a receiver output corresponding change, namely originally a state for high level into a low level, origina

18、lly for low level into high level. The output power switch and mute as control etc. Sometimes also called the output form for "invert". "The interlock" refers to multiple outputs each output, at the same time only one output. The TV sets of this case is selected, the other is lik

19、e the light and sound input speed, etc."Data" refers to launch the output some key, use a few output form a binary number, to represent different keystroke.Normally, the receiver except a few data output, but also a "valid" output data, so the timely to collect data. This output

20、form with single-chip microcomputer or are commonly used interface. In addition to the above output form outside, still have a "latch" and "temporary" two forms. The so-called "latch" refers to launch the output signal of each hair, the receiver output corresponding &qu

21、ot;, "new store until you receive signals. "Temporary" output and the introduction of "level" output is similar.Remote distance (Remote Control effect of RF Remote Control distance) are the major factors as follows:1, launched in power transmission power: while distance, but

22、 great power consumption, easy to generate interference,2 and receiving the receiver sensitivity, receiving, remote distance increased sensitivity to improve, but easy to cause disturbance maloperation or abuse,3, antenna, using linear antenna, and parallel, remote distance, but occupies a large spa

23、ce, in use the antenna spin, pull can increase the remote distance,4 and the higher height: antenna, remote farther, but by objective conditions,5 and stop: current use of wireless remote use of UHF band stipulated by the state, the propagation characteristics of approximate linear transmission, lig

24、ht, small, transmitters and receivers diffraction between such as walls are blocking will greatly discounted remote distance, if is reinforced concrete walls, due to the absorption effect conductor, radio waves.Considering the design of hardware volume small to be embedded in the remote control, so

25、we chose 20 foot single-chip chip AT89C2051. Below is the introduction of the function.1) AT89C2051 internal structure and performanceAT89C2051 is a byte flash 2K with programmable read-only memory can be erased EEPROM (low voltage, high performance of eight CMOS microcomputer. It adopts ATMEL of hi

26、gh-density non-volatile storage technology manufacturing and industrial standard MCS - 51 instruction set and lead. Through the combination of single chip in general CPL1 and flash memory, is a strong ATMEL AT89C2051 microcomputer, its application in many embedded control provides a highly flexible

27、and low cost solutions. The compatible with 8051 AT89C2051 is CHMOS micro controller, the Flash memory capacity for 2KB. And CHMOS 80C51 process, have two kinds of leisure and power saving operation mode. The performance is as follows:8 CUP, 2KB Flash memory,Working voltage range 2.7-6V, 128KB data

28、storage,The static working way: 0-24MHz, 15 root input/output line,A programmable serial, 2 a 16-bit timing/counters,There is a slice of inside precision simulation comparator, 5 the interrupt sources, 2 priority.Programmable serial UART channel, Directly LED driver output,The internal structure of

29、AT89C2051 is shown in figure 1.Figure 1 AT89C2051 interior structure2) AT89C2051 chip pin and functionIn order to adapt to the requirement of intelligent instrument, embedded in the chip foot AT89C2051 simplified configuration, as shown in figure b. The major changes to: (1) the lead foot from 20 to

30、 40 wires, (2) increased a simulated comparator.AT89C2051 pin function: 1 the Vcc: voltage.2 to GND.3 P1 mouth: P1 mouth is an 8-bit two-way I/O port. P1.2 P1.7 mouth pin the internal resistance provides. P1.0 and P1.1 requirements on the external pull-up resistors. P1.0 and P1.1 also separately as

31、piece inside precision simulation123456789101112131415161718192089C2051RST/VPPXTAL2XTAL1GNDVCCP1.1(AIN1)P1.0(AIN0)Diagram b AT89C2051 foot figurecomparator with input (AIN0) and reversed-phase input (AIN1). Output buffer can absorb the P1 mouth 20mA current and can directly LED display driver. When

32、P1 mouth pin into a "1", can make its input. When the pin P1.2 P1.7 as input and external down, they will be for the internal resistance and flow current (IIL). In flash P1 mouth during the procedure and program code data receiving calibration.4 P3: the P3.0 P3.5 P3, P3.7 is the internal r

33、esistance with seven two-way I / 0 lead. P3.6 for fixed inputs piece inside the comparator output signal and it as a general I/O foot and inaccessible. P3 mouth buffer can absorb 20mA current. When P3 mouth pin into "1", they are the internal resistance can push and input. As input, and th

34、e low external P3 mouth pin pull-up resistors and will use current (IIL) outflow. P3 mouth still used to implement the various functions, such as AT89C2051 shown in table 1. P3 mouth still receive some for flash memory programming and calibration of program control signals.P3 mouth function as is sh

35、own in table 1.Table 1P3 mouth pinFunctionRXD(Serial input)TXD(Serial output port)INT0(External interruption 0)INT1(External interruption 1)TO(The timer 0 external input)T1(The timer 1 external input)5 RST: reset input. RST once, all into high level I/O foot will reset to "1". When the osc

36、illator is running, continuous gives RST pin two machine cycle of high level can finish reset. Each machine cycle to 12 oscillator or clock cycle.6 XTAL1: as the oscillator amplifier input and inverse internal clock generator input.7. XTAL2: as the oscillator reversed-phase the amplifier's outpu

37、t.3) the software and hardware constraints. AT89C2051Due to the foot of the chip AT89C2051, no set limits of external storage interface, so, for external memory read/write instructions as MOVX etc.Due to 2KB ROM, so, the space to jump instruction should pay attention to the destination address range

38、 (transfer 000H - 7FFH), beyond the range of addresses, will not meet wrong results. The scope of data storage is 00H (7FH - when stack manipulation), also should be noticed.The input signal is simulated by the original P3.6 foot into the microcontroller, so the original P3.6 footUnable to external

39、use. Simulation comparator can compare two simulation, if the size of the voltage external A D/A converter and its output as A comparator analog input, and by simulating the comparator another input voltage to be measured, through the introduction of the software method can realize the A/D conversio

40、n.4 the Flash memory AT89C2051)Provide a 2KB of single-chip AT89C2051 in Flash memory chips, which allows the online program to modify or use special programming.A. Flash memory encryptionAT89C2051 SCM has 2 encryption, can programming (P) or programming (U) to obtain different encryption functional

41、ity. Encryption functionality table as shown in table 1-1.Table 1-1LB1LB2Encryption functionalityUUNo encryption functionalityPUProhibit to flash to programmingPPProhibit to flash to programming，Also banned programEncrypt a content erased only through chips to erase operation.B. Flash memory program

42、ming and procedures(1) the piece inside chip AT89C2051 Flash memory programming model as shown in table 1-2.Table 1-2 AT89C2051 microcontroller programming modelModeWrite code data12V L H H HRead code dataH H L L H HWrite code data LB1Write code data LB212V H H H H12V H H L L Chip erased12V H L L LR

43、ead the signal bytes H H L L L LNote: (1) the counters RESET at an EPROM inside the rising edge, and 000H RESET to XTAL1 by foot is executed, pulse count,(2) pieces of 10ms to erase PROG pulse,(3 )during the programming P3.1 pulled low RDY/BSY instructions.C).A T89C2051 SCM in Flash memory chips pro

44、gramming steps are as follows:1. in the sequence is the VCC GND pin, add working voltage, XTAL1 pin RESET, receiving GND pin, other than the above time, waiting for 10ms,2. In P3.2 pin RESET, heightening level,3. In P3.3, P3.4, P3.5, P3.7 pin; add model multilevel4. P1.0 P1.7 - for the 000H unit add

45、 data bytes,5. RESET to increase the 12V activation programming,6. P3.2 jump to a one byte programming or encryption,7. calibration has been programming, data from 12V to RESET logic level "H" and set P3.3 P3.7 - for the correct level, and can output data in P1 mouth,Figure c programming c

46、ircuit Figure d calibration circuit8.For the next addresses) in the unit XTAL1 byte programming, a pulse, make address counter add 1, in mouth add programming data P1.Repeat step 1-8 complete the whole - 2KB programming.Electricity is XTAL1 Settings: in order to "L" RESET, and float empty

47、other I/O foot, close the VCC power.(3) programming and calibration circuit figure c, d.Explanation:(1) P3.1 during programming instructions to be low RDY/BSY,(2) single erasing the PROG 10ms need,(3) internal EEPROM address counter on the rising edge RESET, and 000H RESET to XTAL1 by foot pulses ar

48、e executed.Along with the rapid development of science and technology, human society has undergone earth-shaking changes. Make our life more colorful. In these changes, the remote control technology has been widely permeates TV, aerospace, military, sports and other production, all aspects of life.

49、From the broad sense, all equipped with electric locomotive facility or electrical switches, if feel some necessary, can consider to improve existing with remote control device, the operation fixed switch to realize the remote operation of the original equipment, stop, the variable, etc. Function.sw

50、itch, for example, can be used to control the electric control switch the light switch, We design the infrared remote control system to realize the opponent switch quantity control. Infrared remote characteristic is not influence the surrounding environment and does not interfere with other electric

51、 equipment. Due to its cannot penetrate walls, so the room can use common household appliance of remote control without mutual interference, Circuit testing is simple, as long as given circuit connection, generally does not need any commissioning can work, Decoding easily, can undertake multiple rem

52、ote control.红外遥控及芯片介绍人的眼睛能看到的可见光按波长从长到短排列，依次为红、橙、黄、绿、青、蓝、紫。其中红光的波长范围为0.620.76m；紫光的波长范围为0.380.46m。比紫光波长还短的光叫紫外线，比红光波长还长的光叫红外线。红外线遥控就是利用波长为0.761.5m之间的近红外线来传送控制信号的。常用的红外遥控系统一般分发射和接收两个局部。发射局部的主要元件为红外发光二极管。它实际上是一只特殊的发光二极管，由于其内部材料不同于普通发光二极管，因而在其两端施加一定电压时，它便发出的是红外线而不是可见光。目前大量使用的红外发光二极管发出的红外线波长为940nm左右，外形与普

53、通 5发光二极管相同，只是颜色不同。红外发光二极管一般有黑色、深蓝、透明三种颜色。判断红外发光二极管好坏的方法与判断普通二极管一样：用万用表电阻挡量一下红外发光二极管的正、反向电阻即可。红外发光二极管的发光效率要用专门的仪器才能精确测定，而业余条件下只能用拉距法来粗略判定。接收局部的红外接收管是一种光敏二极管。在实际应用中要给红外接收二极管加反向偏压，它才能正常工作，亦即红外接收二极管在电路中应用时是反向运用，这样才能获得较高的灵敏度。红外接收二极管一般有圆形和方形两种。由于红外发光二极管的发射功率一般都较小100mW左右，所以红外接收二极管接收到的信号比拟微弱，因此就要增加高增益放大电路。前

54、些年常用PC1373H、CX20106A等红外接收专用放大电路。最近几年不管是业余制作还是正式产品，大多都采用成品红外接收头。成品红外接收头的封装大致有两种：一种采用铁皮屏蔽；一种是塑料封装。均有三只引脚，即电源正VDD、电源负GND和数据输出VO或OUT。红外接收头的引脚排列因型号不同而不尽相同，可参考厂家的使用说明。成品红外接收头的优点是不需要复杂的调试和外壳屏蔽，使用起来如同一只三极管，非常方便。但在使用时注意成品红外接收头的载波频率。红外遥控常用的载波频率为38kHz，这是由发射端所使用的455KHz陶振来决定的。在发射端要对晶振进行整数分频，分频系数一般取12，所以KHz38KHz。

55、也有一些遥控系统采用36kHz、40kHz、56kHz等，一般由发射端晶振的振荡频率来决定。红外遥控的特点是不影响周边环境、不干扰其它电器设备。由于其无法穿透墙壁，故不同房间的家用电器可使用通用的遥控器而不会产生相互干扰；电路调试简单，只要按给定电路连接无误，一般不需任何调试即可投入工作；编解码容易，可进行多路遥控。由于各生产厂家生产了大量红外遥控专用集成电路，需要时按图索骥即可。因此，现在红外遥控在家用电器、室内近距离小于10米遥控中得到了广泛的应用。多路控制的红外遥控系统 多路控制的红外发射局部一般有许多按键，代表不同的控制功能。当发射端按下某一按键时，相应地在接收端有不同的输出状态。接收

56、端的输出状态大致可分为脉冲、电平、自锁、互锁、数据五种形式。“脉冲输出是当按发射端按键时，接收端对应输出端输出一个“有效脉冲，宽度一般在100ms左右。“电平输出是指发射端按下键时，接收端对应输出端输出“有效电平，发射端松开键时，接收端“有效电平消失。此处的“有效脉冲和“有效电平，可能是高、也可能是低，取决于相应输出脚的静态状况，如静态时为低，那么“高为有效；如静态时为高，那么“低为有效。大多数情况下“高为有效。“自锁输出是指发射端每按一次某一个键，接收端对应输出端改变一次状态，即原来为高电平变为低电平，原来为低电平变为高电平。此种输出适合用作电源开关、静音控制等。有时亦称这种输出形式为“反相

57、。“互锁输出是指多个输出互相去除，在同一时间内只有一个输出有效。电视机的选台就属此种情况，其它如调光、调速、音响的输入选择等。“数据输出是指把一些发射键编上号码，利用接收端的几个输出形成一个二进制数，来代表不同的按键输入。一般情况下，接收端除了几位数据输出外，还应有一位“数据有效输出端，以便后级适时地来取数据。这种输出形式一般用于与单片机或微机接口。 除以上输出形式外，还有“锁存和“暂存两种形式。所谓“锁存输出是指对发射端每次发的信号，接收端对应输出予以“储存，直至收到新的信号为止；“暂存输出与上述介绍的“电平输出类似。影响遥控器遥控距离Remote distance of RF Remote Control的因素主要有如下几点：1、发射功率：发射功率大那么距离远，但耗电大，容易产生干扰；2、接收灵敏度：接收器的接收灵敏度提高，遥控距离增大，但容易受干扰造成误动或失控；3、天线：采用直线型天线，并且相互平行，遥控距离远，但占据空间大，在使用中把天线拉长、拉直可增加遥控距离；4、高度：天线越高，遥控距离越远，但受客观条件限制；5、阻挡：目前使用的无线遥控器使用国家规定的UHF频段，其传播特性和光近似，直线传播，绕射较小，发射器和接收器之间如有墙壁阻挡将大大打折遥控距离，如果是钢筋混泥土的墙壁，由于