1、wireless remote control 41 中文 2850 字 外文翻译及原文 外文原版 How Remote Controls Work Wireless remote control means to achieve the objectives of the charged non-contact remote control, in industrial control, aerospace, consumer electronics applications. Wireless remote control and wireless transmission systems
2、 with cable and infrared equipment to enhance the mobile freedom compared. This wireless remote control devices and wireless transmission systems in industrial applications is increasing. Cable to connect the relative advantage of low installation costs (no wiring, no underground works, there is no
3、cable trough), increased flexibility and reduced maintenance costs. Wireless Remote Control Category Wireless remote control system of the type and classification of many, the main methods are: transmission control directives by the carrier signal is divided into: radio remote control, infrared remo
4、te control, ultrasonic remote control； encoding in accordance with sub-signals: frequency encoding and pulse code； by the transmission channel is divided into: single-channel and multi-channel remote control； according to the same time the number of instructions can be transmitted is divided into: s
5、ingle-channel and multi-channel remote control； command signals in accordance with the objectives of the control technology was charged as follows: switch-type the proportion of type remote control. Wireless remote control component Remote control system in general by the transmitter and the receive
6、r is composed of two parts. General by the command transmitter key, instruction encoding circuit, modulation circuit, driver circuit, firing circuit, such as a few parts. Instruction encoding circuit encoding the instructions to produce signals encoding instructions to the carrier modulation signal,
7、 and then carried out by the drive circuit power amplifier circuit out by the launch after launch of the command modulation signal encoding. Receiver general by the receiving circuit, amplifier, demodulator circuits, instruction decoder circuit, drive circuit and the implementation of the circuit co
8、mposed of several parts. Transmitter receiver circuits will be launched by the coding instructions have been modulated 西安交通大学城市学院本科生毕业设计（外文翻译） 42 down signal reception and demodulation circuit made major evacuation. Demodulation circuit demodulator will be transferred down the development of coding,
9、 that is, to restore the signal for the encoding. Encoding instruction decoder for decoding command signals, and finally by the drive circuit to drive the implementation of circuit operation to achieve a variety of commands. Wireless Remote Control Applications The use of infrared technology to laun
10、ch non-visible light systems and wireless communications systems have obvious shortcomings: On the one hand, in the transmitter and the receiver can not be obstacles between, on the other hand, the effective range was limited. For the use of cables or infra-red remote control system, in the receiver
11、s direction and distance have greater restrictions. On the other hand, wireless remote control system can provide the best freedom of movement. Now through the application of the most advanced wireless data transmission technology can be removed from the design and installation of complicated work.
12、Industry data can be two-way wireless modem to transmit digital, analog, serial and CAN data transmission distance can reach 300m. The data transmission of wireless data modems and 433Hz in the DECT based on the. Can be used to fine-tune control device to achieve fast and flexible to meet the specif
13、ic requirements of client applications. Complete configuration of the wireless modem can achieve flexible and secure a variety of different applications in many fields of data transfer tasks. Wireless remote control systems and wireless data transmission system in the industrial sector and the indus
14、trial environment has an increasing number of applications possible. Area in plant utilities such as industrial doors, door-shaped frame, lift cabinets, lighting and control platform. In industry, such as machine control, device control, transfer device, press control, ground and air delivery system
15、s, such as dynamic storage. In the construction and road construction and agriculture can also be a wireless remote control system can work more smoothly Introduction to How Remote Controls Work The worlds first remote controls were radio-frequency devices that directed German naval vessels to crash
16、 into Allied boats during WWI. In WWII, remote controls detonated bombs for the first time. The end of the great wars left scientists with a brilliant technology and nowhere to apply it. Sixty years later, some of us spend an wireless remote control 43 hour looking for the remote before we remember
17、there are buttons on the TV. In this article, well examine the infrared technology used in most home theaters, look at the difference between IR and RF remotes, find out the difference between a universal and a learning remote and check out some of the other high-tech features you can find on remote
18、s today, like PC connectivity, RF extenders and macro commands. Infrared Remote Controls: The Process Pushing a button on a remote control sets in motion a series of events that causes the controlled device to carry out a command. The process works something like this: 1. You push the volume up butt
19、on on your remote control, causing it to touch the contact beneath it and complete the volume up circuit on the circuit board. The integrated circuit detects this. 2.The integrated circuit sends the binary volume up command to the LED at the front of the remote. 3.The LED sends out a series of light pulses that corresponds to the binary volume up command. One example of remote-control codes is the Sony Control-S protocol, which is used for Sony TVs and includes the following 7-bit binary commands:
