Building staircase multifunctional electric meter

Abstract

The invention relates to a building staircase multifunctional electric meter, which comprises a current transformer, a sampling circuit, a voltage sampling circuit, a person trajectory analysis device and an MSP430 single chip microcomputer, wherein the current transformer and the sampling circuit are used for sampling current signals in an AC line; the voltage sampling circuit is used for sampling voltage signals in the AC line; the person trajectory analysis device is used for determining whether the action trajectory of a person target in the staircase is suspicious; and the MSP430 single chip microcomputer is connected with the current transformer and the sampling circuit, the voltage sampling circuit and the person trajectory analysis device respectively for determining active power and reactive power in the AC line based on the sampled current signals and the sampled voltage signals and determining whether the person target is an escaped convict based on output of the person trajectory analysis device. Thus, the building security efficiency is improved while the electric energy outputted by the AC line can be accurately detected.

Description

technical field [0001] The invention relates to the field of wireless networks, in particular to a multifunctional watt-hour meter in a building elevator room. Background technique [0002] The working principle of the watt-hour meter is as follows: when the watt-hour meter is connected to the circuit under test, an alternating current flows through the current coil and the voltage coil, and the two alternating currents generate alternating currents in their iron cores respectively. The magnetic flux; the alternating magnetic flux passes through the aluminum disk, and an eddy current is induced in the aluminum disk; the eddy current is subjected to force in the magnetic field, so that the aluminum disk obtains torque (active torque) and rotates. The greater the power consumed by the load, the greater the current passing through the current coil, the greater the eddy current induced in the aluminum disc, and the greater the torque that makes the aluminum disc rotate. That is...

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Problems solved by technology

[0004] However, the design of the watt-hour meter in the prior art has certain limitations, because the watt-hour meter is usually placed in the public space, but it is not equipped with auxiliary function equipment to monitor the condition of the public space or realize other functions. The meter is on

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