30results about How to "Improve lightning protection ability" patented technology

The invention discloses a passive optical splitting RS-485 optical fiber bus access method, which is characterized in that it comprises the following steps: (1) setting the RS-485 bus control terminal; (2) setting the passive RS-485 optical network office (3) set the passive RS-485 optical network terminal; (4) set the user terminal equipment; (5) the RS-485 bus control terminal sends out the control signal, and the passive RS-485 optical network local end converts the control signal into The optical signal is transmitted to the passive RS-485 optical network terminal, and the optical signal is converted into an RS-485 bus logic signal to control the user terminal equipment; (6) The user terminal equipment sends the feedback data signal through the passive RS-485 optical network The terminal converts the optical signal into an optical signal, and then transmits the optical signal to the passive RS‑485 optical network central office through the optical fiber, and the passive RS‑485 optical network central office converts the optical signal into an RS‑485 bus level or RS‑485 232 level signal, transmitted to the RS-485 interface or RS-232 interface of the RS-485 bus control terminal. The invention also discloses a system for implementing the method.

The invention discloses a passive light-splitting RS-485 optical fiber bus local side system. The system is characterized in that the two ends of the system are connected with an RS-485 bus control terminal and a passive RS-485 optical network terminal of an industry optical fiber bus for passive light splitting respectively. The system comprises a power module, a main control panel, a plurality of plane waveguide optical dividers and a plurality of light ports which are connected. The main control panel comprises an RS-232 center control interface, an RS-485 center control interface, two RS-485 cascade interfaces, a plurality of photoelectric conversion modules and a bus arbitration processor. The RS-232 interface and the two RS-485 cascade interfaces are connected with the bus arbitration processor and the RS-485 bus control terminal. One ends of the multiple photovoltaic conversion modules are connected with the bus arbitration processor, and the other ends of the multiple photovoltaic conversion modules are connected with one ends of the plane waveguide optical dividers. The other ends of the plane waveguide optical dividers are connected with the light ports.

The invention relates to a single-circuit power transmission line straight line side slope tower. The single-circuit power transmission line straight line side slope tower can ensure the distance between an uphill slope side wire and the ground and reduce the height of a downhill slope side wire, and therefore the circuit lightning protection performance is improved. According to the technical scheme, the single-circuit power transmission line straight line side slope tower comprises tower legs, a tower body, a tower head, three wires and wire insulator chains, the tower head is composed of a lower wire cross arm, an upper wire cross arm, a tower window, a lower ground wire cross arm and an upper ground wire cross arm, the lower ground wire cross arm and the upper ground wire cross arm are located at the top end of the tower window, a middle phase wire is installed inside the tower window in a linkage mode, the lower wire cross arm and the upper wire cross arm are located on the two sides of the tower head respectively and respectively provided with one side phase wire in a linkage mode, and the distance between the upper wire cross arm and the ground is basically equal to the distance between the lower wire cross arm and the ground, so that the three wires which are installed inside the lower wire cross arm, the upper wire cross arm and the tower window in a linkage mode are arranged parallel to a natural mountain gradient.