Abstract: A method and a system for optimization to non-contact micro intelligent sensing in secondary DC loop potential are provided, including demodulating a weak AC current modulation signal through a demodulation circuit and amplifying the weak AC current modulation signal; amplifying the weak AC current modulation signal to output a stable and amplified measurable potential signal; processing the potential signal for noise to obtain a stable DC potential signal; inputting the DC potential signal to a comprehensive computing module for analysis and processing; using micro sensors to measure information. The measured potential results are input to the comprehensive computing module to analyze and correct, and the measurement results are output to the communication module for external output. The equipment is packaged to form a potential collection “probe” and a potential measurement “unit”. The potential measurement “unit” supports multiple potential collection “probes” for accessing.

Abstract: The invention discloses an intelligent operation and maintenance control platform and system for a secondary power system, belonging to field of power system operation and maintenance technology. The platform includes a interval layer, a transmission layer, a station control layer, a system layer, a platform layer, an application layer, and a disaster recovery backup centre. By collecting data from a security system and external information system, and sharing data with other application platforms of a secondary system, problems of omission, repetition, and isolation in current data collection are solved.

Abstract: A method for online monitoring of temperature in current terminal blocks based on thermal imaging are provided, including: obtaining real-time temperature distribution information of current terminals of a terminal box; using an external communication substation to upload the obtained real-time temperature distribution information to the secondary intelligent operation-and-maintenance control platform; determining whether there is an abnormality in temperature of the current terminals, if there is an abnormality, issuing an alarm message about potential danger for an open circuit of a current secondary circuit. The method provided by the present invention has a self-verification function of measurement data and can suppress the influence of ambient temperature.

Abstract: The invention discloses an inserting rod type quick connection device, which comprises an upper sleeve and a lower sleeve with an opening at one end, wherein the upper sleeve is provided with an inserting rod extending out of the opening, the open end of the lower sleeve is provided with a detachable extrusion sleeve, the extrusion sleeve is provided with a plurality of extrusion gaskets, wherein the plurality of extrusion gaskets are fitted and connected to form a hollow conical cylinder structure, the outer conical surface of the conical cylinder is provided with a spiral groove, and a conical spring is sleeved in the spiral groove, the outer diameter and the inner diameter of the conical cylinder gradually decrease from the lower end surface to the upper end surface, wherein the inserting rod is conical, and the taper of the inserting rod is the same as that of the inner conical surface of the conical cylinder.

Abstract: The present disclosure relates to a notched steel beam and a floor slab structure of a flange embedded floor slab and a construction method. The notched steel beam comprises a web (1), wherein an upper flange (2) and a lower flange (3) are respectively arranged on the upper end and the lower end of the web (1); the flange embedded floor slab comprises four rectangularly distributed floor slab stand columns (7), a steel beam (8) is arranged between the adjacent floor slab stand columns (7), laminated slab bottom slabs (9) are arranged between the two steel beams (8) which are symmetrically distributed, floor slab reinforcing steel bars (10) are arranged above the laminated slab bottom slabs (9), a concrete layer (11) is arranged on the floor slab reinforcing steel bars (10); and the steel beam (8) is the notched steel beam of the flange embedded floor slab.

Abstract: The present disclosure provides a combined prefabricated reinforced concrete stair mold and a splicing method. The combined prefabricated reinforced concrete stair mold comprises a bottom mold platform (1), wherein an upper platform module (2), a tread module (3) and a lower platform module (4) which are spliced with one another are sequentially arranged on the upper surface of the bottom mold platform (1), and corner modules (5) are arranged between the upper platform module (2) and the tread module (3) and between the tread module (3) and the lower platform module (4); the tread module (3) comprises a tread upper surface mold (6) and a tread lower surface mold (7); and the tread lower surface mold (7) comprises a plurality of combined templates (8) formed by mutual splicing, and the tread upper surface mold (6) comprises a plurality of tread splicing pieces (9) formed by mutual splicing.