xylophoneplayer(lovely xylophone)

大家好，本篇文章为大家解答以上问题，相信很多人对xylophoneplayer都不是特别的了解，因此呢，今天就来为大家分享下关于xylophoneplayer以及lovely xylophone的问题知识，还望可以帮助大家，解决大家的一些困惑，下面一起来看看吧！

本文目录一览

• 1、xylophone是什么职业
• 2、请问哪里可以找到关于"简易无线电遥控系统"的英文资料?

xylophone是什么职业

1、X-ray technician X光技师；

2、X-ray-equipment inspector；

3、X-ray-equipment tester X光设备测试师；

4、Xerox operator 复印机操作员；

5、xylographer 木板画家；

6、xylophone maker 木琴匠人；

7、xylophone player 木琴乐师；

8、xylophone teacher木琴教师；

9、yacht cleaner 游艇清洁员。

拼音字母x、y开头的职业

1、印刷配套设备；

2、印刷项目合作；

3、 器械代理 品代理；

4、印刷包装制品黏合剂；

5、医药、 品代理；

6、医药代理中药饮片；

7、运动休闲用品代理；

8、音像制品加工；

9、印刷耗材代理加盟；

10、印刷 产品代理；

11、音像制品代理加盟；

12、以太网网关；

13、运动休闲用品代理。

请问哪里可以找到关于"简易无线电遥控系统"的英文资料?

Remote control

A remote control is an electronic device used for the remote operation of a machine.

The term remote control can be also referred to as "remote" or "controller" when abbreviated. It is known by many other names as well, such as the "clicker", "channel-changer", "splat", "magic hand", etc. Commonly, remote controls are used to issue commands from a distance to televisions or other consumer electronics such as stereo systems and DVD players. Remote controls for these devices are usually all wireless handheld objects with an array of buttons for adjusting various settings such as television channel, track number, and volume. In fact, for the majority of modern devices with this kind of control, the remote contains all the function controls while the controlled device itself only has a handful of essential primary controls. Most of these remotes communicate to their respective devices via infrared (IR) signals and a few via radio signals. They are usually powered by all AAA or AA size batteries.
Contents
[hide]

* 1 History
o 1.1 Television Remote Controls
o 1.2 Other Remote Controls
* 2 Technique
* 3 Usage
o 3.1 Industry
o 3.2 Emergency
o 3.3 Military
o 3.4 Space
o 3.5 Video games
o 3.6 Toys
* 4 See also
o 4.1 Products and standards
* 5 External links
* 6 References

[edit] History

One of the earliest examples of remote control was developed in 1893 by Nikola Tesla, and described in his patent, U.S. Patent 613,809 , named Method of an Apparatus for Controlling Mechani of Moving Vehicle or Vehicles.

In 1903, Leonardo Torres Quevedo presented the Telekino at the Paris Academy of Science, accompanied by a brief, and making an experimental demonstration. In the same year, he obtained a patent in France, Spain, Great Britain, and the United States. The Telekino consisted of a robot that executed commands tran itted by electromagnetic waves. It constituted the world's first apparatus for radio control and was a pioneer in the field of remote control. In 1906, in the presence of the king and before a great crowd, Torres successfully demonstrated the invention in the port of Bilbao, guiding a boat from the shore. Later, he would try to apply the Telekino to projectiles and torpedoes, but had to abandon the project for lack of financing.

The first remote-controlled model aeroplane flew in 1932, and the use of remote control technology for military purposes was worked intensively during the Second World War, one result of this being the German Wasserfall missile.

By the late 1930s, several radio manufacturers offered remote controls for some of their higher-end models. Most of these were connected to the set being controlled by wires, but the Philco Mystery Control (1939) was a battery-operated low-frequency radio tran itter [1], thus making it the first wireless remote control for a consumer electronics device.

[edit] Television Remote Controls
There are 11 various remote controls for TV-, VHS- and DVD-devices shown here
There are 11 various remote controls for TV-, VHS- and DVD-devices shown here

The first remote intended to control a television was developed by Zenith Radio Corporation in 1950. The remote — officially called "Lazy Bones" was connected to the television set by a wire. To improve the cumbersome setup, a wireless remote control called "Flashmatic" was developed in 1955 which worked by shining a beam of light onto a photoelectric cell. Unfortunately, the cells did not distinguish between light from the remote and light from other sources and the Flashmatic also required that the remote control be pointed very accurately at the receiver.[2]
The Zenith Space Commander 600 remote control
The Zenith Space Commander 600 remote control

In 1956 Robert Adler developed "Zenith Space Command", a wireless remote.[3] It was mechanical and used ultrasound to change the channel and volume. When the user pushed a button on the remote control it clicked and struck a bar, hence the term "clicker". Each bar emitted a different frequency and circuits in the television detected this noise. The invention of the transistor made possible cheaper electronic remotes that contained a piezoelectric crystal that was fed by an oscillating electric current at a frequency near or above the upper threshold of human hearing, though still audible to dogs. The receiver contained a microphone attached to a circuit that was tuned to the same frequency. Some problems with this method were that the receiver could be triggered accidentally by naturally occurring noises, and some people, especially young women, could hear the piercing ultrasonic signals. There was even a noted incident in which a toy xylophone changed the channels on these types of TVs since some of the overtones from the xylophone matched the remote's ultrasonic frequency.
Jerrold remote control by General Instrument from the late 1970s
Jerrold remote control by General Instrument from the late 1970s

The impetus for a more complex type of television remote control came in the late 1970s with the development of the Ceefax teletext service by the BBC. Most commercial remote controls at that time had a limited number of functions, sometimes as few as three: next channel, previous channel, and volume/off. This type of control did not meet the needs of teletext sets where pages were identified with three-digit numbers. A remote control to select teletext pages would need buttons for each number from zero to nine, as well as other control functions, such as switching from text to picture, and the normal television controls of volume, station, brightness, colour intensity and so on. Early teletext sets used wired remote controls to select pages but the continuous use of the remote control required for teletext quickly indicated the need for a wireless device. So BBC engineers began talks with one or two television manufacturers which led to early prototypes in around 1977-78 that could control a much larger number of functions. ITT was one of the companies and later gave its name to the ITT protocol of infrared communication. [4]

[edit] Other Remote Controls

In the 1980s Steve Wozniak of Apple, started a company named CL 9. The purpose of this company was to create a remote control which could operate multiple electronic devices. The CORE unit as it was named (Controller Of Remote Equipment) was introduced in the fall of 1987. The advantage to this remote controller was that it could “learn” remote signals from other different devices. It also had the ability to perform specific or multiple functions at various times with its built in clock. It was also the first remote control which could be linked to a computer and loaded with updated software code as needed. The CORE unit never made a huge impact of the market. It was much too cumbersome for the average user to program, but it received rave reviews from those who could figure out how to program it. These obstacles eventually lead to the demise of CL 9, but one of its employees continued the business under the name Celadon. This was one of the first computer controlled learning remote controls on the market. [5]

By the early 2000s, the number of consumer electronic devices in most homes greatly increased. According to the Consumer Electronics Association, an average American home has four remotes. To operate a home theater as many as five or six remotes may be required, including one for cable or satellite receiver, VCR or digital video recorder, DVD player, TV and audio amplifier. Several of these remotes may need to be used sequentially, but, as there are no accepted interface guidelines, the process is increasingly cumbersome. Many specialists, including Jakob Nielsen [6], a renowned usability specialist and Robert Adler, the inventor of the modern remote, note how confusing, unwieldy and frustrating the multiplying remotes have become.

[edit] Technique
This article needs additional citations for verification.
Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (January 2008)
The emission spectrum of a typical sound system remote control is in the near infrared.
The emission spectrum of a typical sound system remote control is in the near infrared.
The modulation of the IR diode varies by button.
The modulation of the IR diode varies by button.

Most control remotes for electronic appliances use a near infrared diode to emit a beam of light that reaches the device. A 940 nm wavelength LED is typical. This infrared light is invisible to the human eye but carries signals that are detected by the appliance, as well as by the sensor of a digital camera.

With a single channel (single-function, one-button) remote control the presence of a carrier signal can be used to trigger a function. For multi-channel (normal multi-function) remote controls more sophisticated procedures are necessary: one consists of modulating the carrier with signals of different frequency. After the demodulation of the received signal, the appropriate frequency filters are applied to separate the respective signals. Nowadays digital procedures are more commonly used. One can often hear the signals being modulated on the infrared carrier by operating a remote control in very close proximity to an AM radio not tuned to a station.

[edit] Usage

[edit] Industry

Remote control is used for controlling substations, pump storage power stations and HVDC-plants. For these systems often PLC-systems working in the longwave range are used.

[edit] Emergency

Remotely controlled machinery is used in radioactive or toxic environments to avoid human casualties and to prevent damage to human health. For example, remotely controlled robots were used during liquidation of circumstances of Chernobyl disaster.

[edit] Military

In World War I the Imperial German Navy employed FL-boats (Fernlenkbootes) against coastal shipping. These were driven by internal combustion engines, and controlled remotely from a shore station through several miles of wire wound on a spool on the boat. An aircraft was used to signal directions to the shore station. EMBs carried a high explosive charge in the bow and traveled at speeds of thirty knots.[7]

The Soviet Red Army used remotely controlled teletanks during 1930s in the Winter War against Finland and the early stages of the Great Patriotic War. A teletank is controlled by radio from a control tank at a distance of 500–1,500 meters, the two constituting a telemechanical group. The Red Army fielded at least two teletank battalions at the beginning of the Great Patriotic War. There were also remotely controlled cutters and experimental remotely controlled planes in the Red Army.

[edit] Space

Remote control technology is also used in space travel, for instance the Russian Lunokhod vehicles were remote-controlled from the ground. Direct remote control of space vehicles at greater distances from the earth is not practical due to increasing signal delay times.

[edit] Video games

Video game consoles had not used wireless controllers until recently, mainly because of the difficulty involved in playing the game while keeping the infrared tran itter pointed at the console. Early wireless controlers were cumbersome and when powered on alkaline batteries, lasted only a few hours before they needed replacement. Some wireless controllers were produced by third parties, in most cases using a radio link instead of infrared. Even these were very inconsistent, and in some cases, had tran ission delays, making them virtually useless. The first official wireless controller made by a first party manufacturer was the WaveBird for Nintendo Gamecube. The Wavebird changed the face of wireless technology in video game consoles. In the current generation of gaming consoles, wireless controllers have become the standard.

[edit] Toys

Main article: Radio-controlled model

Remote control toys, such as racing cars, boats and even aircraft are a favorite pastime of many people.

[edit] See also

* Universal remote
* Channel surfing
* Radio control
* Domotics
* Audience response
* Remote keyless system
* Telecommand
* Remote-controlled animal
* Control Car Remote Control Locomotive
* Garage door opener

[edit] Products and standards

* INSTEON
* LIRC
* X10 (industry standard)
* TV-B-Gone
* JP1 remote, a common interface that allows ad-hoc reprogramming of some remote controls

[edit] External links

* Description of infrared remote protocols
* Infra-red handset technical overview
* Infra-red handset signalling systems
* Infra-red Remote Control Theory
* Five Decades of Channel Surfing: History of the TV Remote Control
* New Remote's History of the Remote Control

[edit] References

1. ^ Philco Mystery Control.
2. ^ Five Decades of Channel Surfing: History of the TV Remote Control.
3. ^ Farhi, Paul. "The Inventor Who Deserves a Sitting Ovation." Washington Post. Feb. 17, 2007.
4. ^ SB-Projects: IR remote control: ITT protocol.
5. ^ [http://www.celadon.com/Profile/Profile.html Celadon Remote Control Systems Company Profile Page].
6. ^ Jakob Nielsen's Alertbox: Remote Control Anarchy.
7. ^ Lightoller, CH: "Titanic and other ships" I. Nicholson and Watson, 1935