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PLC-based intelligent household gateway apparatus

Disclosed in the invention is a PLC-based intelligent household gateway apparatus. The apparatus comprises: a master control unit, which is used for central controlling; an interaction unit, which is used for carrying out information interaction with a user; a metering unit, which is used for electric quantity metering; a wireless route communication unit, which is used for broadband access, indoor wireless network signal coverage, and communication with other communication terminals; a PLC communication unit, which is used for indoor power line carrier communication and is respectively connected with the master control unit, and a 220-V power line; a power supply limiting unit, which is used for controlling a household electricity load and is respectively connected with the master control unit and a household circuit input circuit; and a power supply unit, which is used for providing power for all the units. And the interaction unit, the metering unit and the wireless route communication unit are respectively connected with the master control unit. According to the invention, the intelligent household gateway apparatus that has high integration is integrated with the function as a household intelligent ammeter and the functions of intelligent power management, intelligent household, and home network access and the like, thereby building comfortable, intelligent, high-efficiency, and green household living environment.
Owner:南京博立康电力设备有限公司

Grounding detecting method of power supply system of train

ActiveCN101609124AAccurately detect ground conditionsImproved ground detection reliabilityCurrent/voltage measurementElectrical testingEngineeringVoltage sensor
The invention relates to a grounding detecting method of a power supply system of a train. A passive low-resistance midpoint grounding detecting mode is adopted and is characterized in that a grounding voltage sensor is connected in parallel on an anode line near a first resistor R1 and a second resistor R2 which are connected in series on a no-load of an original power supply system; the grounding voltage sensor is independently grounded; a middle tap is led out between the first resistor R1 and the second resistor R2 which are connected in series on the no-load of the power supply system; at least one auxiliary resistor R3 is connected between the middle tap and an independent groundling line of the grounding voltage sensor; the auxiliary resistor R3 is respectively connected with the middle tap led out between the first resistor R1 and the second resistor R2 of the no-load of the power supply system and the grounding line of the grounding voltage sensor so that when the direct current side of the power supply system of the train is grounded or when electric insulating level is decreased, a positive line or a negative line of the power supply system is equivalent to connect with a resistor relative to the ground. By adopting the invention, the detection reliability of the grounding detection of the power supply system of the train is improved, and phenomena of false operation are reduced.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD

Bioactive porous ceramic tubular bar material as well as preparation method and application thereof

ActiveCN106348785AGood biological activityPro-vascular propertiesNutrientCalcium magnesium
The invention discloses a bioactive porous ceramic tubular bar material as well as a preparation method and application thereof. The bioactive porous ceramic tubular bar material comprises a non-biodegradable calcium magnesium silicate porous ceramic tube and a biodegradable calcium magnesium silicate modified layer, wherein the biodegradable calcium magnesium silicate modified layer is modified by calcium magnesium silicate, subjected to sintering treatment and then cover the pore channel wall of the porous ceramic tube. The preparation method comprises the following steps: performing mixing treatment on tetraethoxysilane, calcium salt, magnesium salt, nitric acid and trace element inorganic salt or acid to obtain hydrogel; putting the pre-built calcium magnesium silicate porous ceramic tube into the hydrogel, dipping, sucking, ageing, drying, calcining and cooling to obtain the bioactive porous ceramic tubular bar material. The tubular bar material provided by the invention can decompress a femoral head necrosis medullary core for a long time, can significantly improve vascularization and nutrient transmission of a necrotic area and can promote new bone regeneration of bone injury; the tubular bar material has excellent bioactivity and has application value in femoral head necrosis and defected bone remodeling of a large bone.
Owner:ZHEJIANG UNIV
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