CPC G01R 31/62 (2020.01) | 6 Claims |
1. A system for perceiving an operating state of a large power transformer based on vibro-acoustic integration, comprising: a perception layer, a network layer and a diagnostic layer, wherein
the perception layer is used for monitoring, in real time, a state parameter for a coupling vibration signal and an acoustic signal of each of a transformer core, a winding, a clamp and a housing, a state parameter of each of a vibration signal and an acoustic signal during a gear position change of an on-load tap changer (OLTC), and preliminarily diagnosing and analyzing monitored data;
the network layer is used for reliably transmitting a monitoring signal to a background;
the diagnostic layer is used for managing basic information of a tested OLTC device; configuring a parameter for analysis of the perception layer; receiving the monitored data from the perception layer; analyzing and displaying a monitoring state and an advanced intelligent analysis result of the tested device in real time; performing fault data analysis, original graph analysis, envelope analysis, and energy spectrum analysis on the specific monitored data; generating and managing a case library; generating and managing a standard library; generating a report; receiving and managing basic device information and a tested device state from a data access node; alarming for an abnormal state and prompting a user; and counting and analyzing a fault gear position distribution, a fault type distribution and the like for the tested device state; and
wherein the perception layer is provided with two perception terminals, used for respectively acquiring a vibration signal and a voiceprint signal, and wirelessly transmitting the vibration signal and the voiceprint signal to a centralized control unit, a sensor, a data acquisition plate, a wireless module, and a battery being integrated into each of the perception terminals, wherein
a microprocessor control unit (MCU) module as a master control chip is used for configuring a sensor unit and a communication unit, acquiring and processing information of the sensor, and sending the information to the communication unit; the sensor unit is used for perceiving and acquiring environmental information; the communication unit is used for receiving and modulating a signal from the MCU or demodulating a signal from an antenna; the antenna is used for transmitting and receiving a signal; a vibro-acoustic signal passes through a micropower crystal amplifier from the sensor to an ultra-low-power voltage comparator; and when the vibro-acoustic signal reaches a limit value, a field effect transistor (FET) is activated.
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