Engineers and scientists around the world are working hard to meet the challenge of energy conservation, one of which is the “One-Way Initiativeâ€, a work that has greatly prevented losses due to “current vampiresâ€, which are billions of devices worldwide. A lot of energy is wasted. Another initiative is the ENERGY STAR certification, which aims to promote the efficiency of these devices over legally required indicators.
However, engineers must first adopt a method to accurately measure and describe the problem before correcting the design problem to improve efficiency. Because energy conservation is an ongoing battle, engineers and scientists need different ways to deal with new demands for change.
A good example is an AC adapter that plugs into a wall outlet. Transformers external to these consumers provide switching from AC to DC power for billions of devices. They also consume power and are therefore called "current vampires", even if the devices connected to them are disconnected, they also absorb current, because the leakage current of the transformer itself causes continuous AC current loss.
Larger devices typically use internal transformers, but they also have the problem of low energy efficiency and wasted energy in standby mode. Studies have shown that 10% of household electrical energy is wasted this way.
Standby power measurement case
Consider a simple example of measuring the standby performance of an AC adapter for a new mobile phone. The usual way to measure the energy loss of the absorbed current is to simply measure the AC sink current with a digital multimeter (DMM) and multiply it by the rms voltage of the power supply.
However, this assumption requires that the circuit be resistive and that the power input is a pure sinusoid. The waveform change of the input voltage or the sink current, and the phase difference between the input voltage and the current consumption, are likely to make a very large difference in calculating the absorbed power.
Android is an open source mobile operating system based on Linux platform released by Google at the end of 2007, and then improved for use in netbooks and MIDs. The platform consists of operating system, user interface and application software, and is claimed to be the first truly open and complete mobile software for mobile terminals.
To put it simply, the Android system is actually a very open system. It can not only realize the functions of the most commonly used notebook computers, but also realize various directional operations like mobile phones. Moreover, it is specially designed for mobile phones. The operating system developed for equipment has advantages in system resource consumption and human-computer interaction design. It is an operating system that combines traditional and advanced advantages.
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