A near-field passive wake-up device and method for the Internet of Things

Abstract

The invention discloses an internet-of-things near field passive waking-up device and method. The internet-of-things near field passive waking-up device comprises a near field waking-up emission unit and a near field waking-up reception unit, and the near field waking-up reception unit is completely a passive circuit and does not have current consumption. When a device needs to be woken up, the emission unit sends a single-frequency pulse code excitation signal through a waking-up circuit, the single-frequency pulse code excitation signal passes through a matching circuit and is emitted through a low-frequency coil; the reception unit is matched to a resonant point and collects electromagnetic wave energy, the electromagnetic wave energy passes through Cockcroft-Walton voltage doubling rectifying circuit and is converted into a DC signal pulse, after the DC signal pulse is subjected to amplitude limiting and shaping, a pulse signal wakes up an MCU (micro controller unit) through an edge or level triggering mode, and therefore an internet-of-things node is woken up. According to the invention, the waking-up signal emitted by the emission unit has a feature code, the wrong waking-up probability is greatly reduced, the anti-jamming capability of the device is improved, at the same time, the near field waking-up reception unit is completely one passive circuit, and can receive signals from the waking-up circuit without power consumption. The internet-of-things near field passive waking-up device and method can be widely applied to low-power dissipation internet-of-things applications.

Description

technical field [0001] The invention relates to the technical field of near-field passive wake-up of the Internet of Things, in particular to a low-power consumption Internet of Things wake-up device and method. Background technique [0002] IoT applications are developing rapidly. In many special occasions, devices need to be powered by batteries, and are distributed in environments that are not easy to install, and even require non-disassembly. Therefore, ultra-long standby time has become an important indicator of IoT wireless devices. [0003] Most of the traditional wake-up methods to extend the standby time adopt the "sleep and listen" periodic cycle method. Such methods inevitably need to periodically turn on the receiving unit, and the average power consumption is still relatively high, which cannot effectively extend the standby time of the node. [0004] There is a special class of IoT applications that require devices to be latent for a long time, possibly as long...

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Problems solved by technology

[0003] Most of the traditional wake-up methods to extend the standby time adopt the "sleep and listen" periodic cycle method. This kind of method inevitably needs to periodically turn on the receiving unit, and the average power consumption is still relatively high, which cannot effectively extend the standby time of the node.

[0004] There is a special class of IoT applications that require devices to be latent for a long time, possibly as long as several years; this makes it impossible to use the wake-up mechanism of sleep and listening loops; in order to minimize the power consumption of IoT nodes and extend the life cycle of nodes, There is an urgent need for a new type of wake-up technology to replace the original periodic sleep wake-up mechanism to achieve the function of wake-up on demand and greatly extend the battery life

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