Fault detector for operating process of electric arc furnace and method thereof

摘要

A fault detector for operating process of electric arc furnace and method thereof are disclosed, which belong to the technical field of fault detection. The fault detector includes the temperature signal acquisition equipment, the current signal acquisition equipment and a host computer. The multimode fault monitoring and diagnosis method comprises the following steps: acquiring and standardizing the data; establishing the preliminary monitoring model for the operating process to obtain common subsets of M operating modes and typical subsets of every operating mode; calculating the T2 statistics and the SPE statistics, and monitoring and diagnosing fault in the operating process. The present invention has the advantages that the colorimetric temperature measurement can improve the calculation accuracy, different equipment becomes compatible, and the fault detector is suitable for operating in industrial production process with a variety of steady modes and can diagnose faults in a certain operating mode.

主权项

1. A fault detector for operating process of an electric arc furnace, comprising:
a host computer; a temperature signal acquisition equipment including an imaging device, a color sensor, two transceiver integrated circuits and a serial communication circuit, the imaging device comprises an objective lens and an eyepiece, the transceiver integrated circuit comprises a microcontroller and a RF transceiver, and one RF transceiver of the two transceiver integrated circuits works as transmitter, and the other works as an acceptor, the input terminal of the color sensor is connected to the imaging device, wherein the objective lens of the imaging device aims a measured target, a photosensitive sensor is fixed in the eyepiece at one end so that the measured target radiation light can be projected to the photosensitive parts of the color sensor by the imaging device, the color sensor is connected to the microcontroller such that when collecting the signal, the microcontroller controls the RF transmitter circuit to transmit wireless RF signals, the RF receiver circuit controls the serial communication circuit to send data to the host computer under the coordination of the microcontroller after receiving signals; a current signal acquisition equipment including an AC transformer and a Programmable Logic Controller (PLC), the output terminal of the AC transformer is connected to an input terminal of the PLC, and the output terminal of the PLC transformer is connected to the host computer, wherein the AC transformer is respectively connected with the three electrodes of the electric arc furnace in series, large current signals which go through the electrodes is transformed into standard signals of 0 to 5 V, and then, the standard signals are transmitted to an analog input terminal of the PLC, after analogue-to-digital conversion by the PLC, the digital signals are transmitted to the host computer through a serial port of PLC; and wherein in the first group transceiver integrated circuit, the output terminal of the color sensor is connected to the input terminal of the microcontroller, and the output terminal of the microcontroller is connected to the input terminal of the RF transmitter, the output terminal of the RF transmitter is connected to the input terminal of the RF receiver in the second group transceiver integrated circuit by a wireless network, the output terminal of the RF receiver is connected to the input terminal of the microcontroller in the second group of transceiver integrated circuit, the output terminal of the microcontroller is connected to an input terminal of the serial communication circuit, and an output terminal of the serial communication circuit is connected to the host computer and wherein two identical transceiver integrated circuits are used to transmit and receive wireless signals and to play a different role in the control of the microcontroller, a configuration software of the host computer has the function of real-time display, history enquiry, data storage and alarm processing.