Abstract: An online monitoring method for insulation status of substation utility cables is provided. The method includes that two ends of a to-be-monitored cable are connected to a primary monitoring device and a secondary monitoring device by using a first coupler and a second coupler respectively; and the primary monitoring device and the secondary monitoring device each inject a high-frequency test signal into the to-be-monitored cable, collect a high-frequency reflected signal in the to-be-monitored cable, perform signal processing by using a frequency-domain peak iterative search algorithm, and extract reflection point parameter information, and the insulation aging status of the to-be-monitored cable is determined by integrated monitoring parameter information at two ends of the to-be-monitored cable.

Abstract: Provided are an FPGA chip-based system and method for detecting a cable insulation state. A cable insulation state monitoring program is started through a control switch. An FPGA chip generates a detection signal of a digital domain into a first circuit and sends the detection signal to a coupler after the detection signal is amplified by a sending circuit. The coupler injects the detection signal into a to-be-detected cable connected to the coupler. The coupler extracts a reflection signal from the to-be-detected cable. The FPGA chip evaluates the state of the to-be-detected cable according to the reflection signal.

Abstract: The present disclosure relates to a method for analyzing a geological body with the help of physical and chemical properties thereof, and in particular, to a method for identifying an exudative sandstone uranium deposit. With the method for identifying an exudative sandstone uranium deposit according to the embodiments of the present disclosure, an exudative sandstone uranium deposit formed by an exudation metallogenesis may be systematically identified, so as to guide prediction and prospecting evaluation of a uranium deposit in red variegated sandstone formations of a sedimentary basin, avoid ore dislocation and ore leakage, open up new prospecting positions and spaces, and break through new uranium resources.