利用環(huán)境能量探測(cè)運(yùn)動(dòng)并節(jié)省能源

　　利用環(huán)境能量探測(cè)運(yùn)動(dòng)在各種環(huán)境中，包括消費(fèi)者、工業(yè)、醫(yī)療和安全部門(mén)都有著廣泛的應(yīng)用前景。傳感器融合，結(jié)合其他傳感器類型的運(yùn)動(dòng)，正在擴(kuò)大，隨著控制器和接口電路集成增加。在某些情況下，傳感器正在檢測(cè)外部運(yùn)動(dòng)，例如用于節(jié)能照明控制的占用傳感器。在其他人中，他們感覺(jué)到他們所依附的裝置的運(yùn)動(dòng)，例如運(yùn)動(dòng)和健身器材。

　　Figure 1： Sports clothing and equipment manufacturers have exploited kinetic energy for some years. Now the technology is maturing. Photo source： Ecouterre.com.

　　In most of these applications， particularly battery-powered devices， power consumption remains a critical factor. Energy harvesting techniques can provide the additional power needed， either to power systems directly， or to provide a battery boost. This is especially useful in environments where batteries cannot be used or cannot easily be replaced. Ironically， motion （kinetic energy） is a potential energy source to be harvested， but piezo-electric， thermo-electric， solar and RF power sources can prove just as useful.

　　This article will highlight actual and potential motion sensing applications that benefit from harvested ambient energy： be it in the home， office or factory; in health and fitness; in the car; as well as in a host of portable devices such as games， smartphones， and cameras. A number of specialist motion sensing components have been designed specifically for ultra-low-power operation.