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  3. If phone calls and Web pages can be beamed through the air to portable devices, then why not electrical power, too? It is a ques

If phone calls and Web pages can be beamed through the air to portable devices, then why not electrical power, too? It is a ques

admin2012-06-02  19
问题     If phone calls and Web pages can be beamed through the air to portable devices, then why not electrical power, too? It is a question many consumers and device manufacturers have been asking themselves for some time. But to seasoned observers of the electronics industry, the promise of wireless recharging sounds de-pressingly familiar. In 2004 Splashpower, a British technology firm, was citing "very strong" interest from consumer-electronics firms for its wireless charging pad. Based on the principle of electromagnetic induction (EMI) that Faraday had discovered in the 19th century, the company’s "Splashpad" contained a coil that generated a magnetic field when a current flowed through it. When a mobile device containing a corresponding coil was brought near the pad, the process was reversed as the magnetic field generated a current in the second coil, charging the device’s battery without the use of wires. Unfortunately, although Faraday’s principles of electromagnetic induction have stood the test of time, Splashpower has not — it was declared bankrupt last year without having launched a single product.
    Thanks to its simplicity and measurability, electromagnetic induction is still the technology of choice among many of the remaining companies in the wireless-charging arena. But, as Splashpower found, turning the theory into profitable practice is not straightforward. But lately there have been some promising developments.
    The first is the formation in December 2008 of the Wireless Power Consortium, a body dedicated to establishing a common standard for inductive wireless charging, and thus promoting its adoption. The new consortium’s members include big consumer-electronics firms, such as Philips and Sanyo, as well as Texas Instruments, a chipmaker.
    Fierce competition between manufacturers of mobile devices is also accelerating the introduction of wireless charging. The star of this year’s Consumer Electronics Show held in Las Vegas was the Pre, a smart-phone from Palm. The Pre has an optional charging pad, called Touchstone, which uses electromagnetic induction to charge the device wirelessly.
    As wireless-charging equipment based on electromagnetic induction heads towards the market, a number of alternative technologies are also being developed. PowerBeam, a start-up based in Silicon Valley, uses lasers to beam power from one place to another.
    It now seems to be a matter of when, rather than if, wireless charging enters the mainstream. And if those in the field do find themselves languishing in the disillusionment, they could take some encouragement from Faraday himself. He observed that "nothing is too wonderful to be true if it be consistent with the laws of nature. " Not even a wirelessly rechargeable iPhone.
Why is wireless recharging a depressing promise for experienced observers of the electronics industry?
选项 A、It is not easy to put the theory into profitable production,
B、Wireless recharging needs new theories besides Faraday’s.
C、Wireless recharging can’t make profit for businesses.
D、It is hard to challenge the monopoly of Splashpower.
答案A
解析 推理判断题。第一段第三句话提到对电子工业富有经验的观察家们来说，无线充电的前景显得熟悉而又令人沮丧。接下来举Splashpower的例子解释其中的原因。第一段段末指出电磁感应的原理经历了时间的检验而Splashpower却宣布破产。第二段第二句话指出将电磁感应原理转变成可盈利的实际产品的道路不是一帆风顺的，因此答案选[A]。
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