Abstract: The provided is a torsion compensation system and a compensation method for a FBG curvature sensor. The compensation system includes a FBG curvature sensor, installed on a scraper conveyor; angle sensors, including two and installed on both sides of the FBG curvature sensor, are configured to obtain the torsion angle of the FBG curvature sensor by monitoring the difference between the two ends of the FBG curvature sensor; a FBG string, arranged on the FBG curvature sensor to form a plurality of grating measuring points, is configured to perceive the center wavelength of the FBG curvature sensor; a FBG demodulator, coupled with the FBG string, is configured to convert the optical signal of the center wavelength perceived by the FBG string into an electrical signal; a computer, respectively coupled with the angle sensors and the FBG demodulator, is configured to eliminate the FBG wavelength variation caused by torsion.

Abstract: An FBG curvature sensing test device and a test method thereof are provided. The test device includes a test platform, an FBG demodulator, and a computer. The test platform includes an optical plate and two constraint components, test pieces are connected between two constraint components, where the constraint component includes an X-axis displacement stage, a Z-axis rotation stage and a fixture, the X-axis displacement stage is connected to the optical plate and can move along an X-axis direction, one end of the Z-axis rotation stage is connected to the X-axis displacement stage, and the other end of the Z-axis rotation stage is connected to the fixture; the FBG demodulator is configured to convert an optical signal of a wavelength change monitored by the FBG test line based on the deformation of the test piece into an electrical signal; the computer is coupled to the FBG demodulator.

Abstract: The provided is a torsion compensation system and a compensation method for a FBG curvature sensor. The compensation system includes a FBG curvature sensor, installed on a scraper conveyor; angle sensors, including two and installed on both sides of the FBG curvature sensor, are configured to obtain the torsion angle of the FBG curvature sensor by monitoring the difference between the two ends of the FBG curvature sensor; a FBG string, arranged on the FBG curvature sensor to form a plurality of grating measuring points, is configured to perceive the center wavelength of the FBG curvature sensor; a FBG demodulator, coupled with the FBG string, is configured to convert the optical signal of the center wavelength perceived by the FBG string into an electrical signal; a computer, respectively coupled with the angle sensors and the FBG demodulator, is configured to eliminate the FBG wavelength variation caused by torsion.

Abstract: An infusion device, a means of assembling the infusion device, and a use. The infusion device comprises an infusion pump (40) and a liquid storage device (112) connected to the infusion pump (40). The liquid storage device (112) and the infusion pump (40) are L-shaped, and the infusion pump (40) is connected to the liquid storage device (112) by means of a slide rail. Said infusion device can be produced as modules, assembly and detachment are convenient, and said device has superior water resistance.

Abstract: An FBG curvature sensing test device and a test method thereof are provided. The test device includes a test platform, an FBG demodulator, and a computer. The test platform includes an optical plate and two constraint components, test pieces are connected between two constraint components, where the constraint component includes an X-axis displacement stage, a Z-axis rotation stage and a fixture, the X-axis displacement stage is connected to the optical plate and can move along an X-axis direction, one end of the Z-axis rotation stage is connected to the X-axis displacement stage, and the other end of the Z-axis rotation stage is connected to the fixture; the FBG demodulator is configured to convert an optical signal of a wavelength change monitored by the FBG test line based on the deformation of the test piece into an electrical signal; the computer is coupled to the FBG demodulator.

Abstract: Disclosed are a photovoltaic power supply system and a control method thereof, and an air conditioning unit. The system includes: a photovoltaic cell panel; a direct-current bus; a DC/DC converter, one end of which is connected to the photovoltaic cell panel, and the other end of which is connected to the direct-current bus; and a switch assembly arranged in parallel with the DC/DC converter, wherein one end of the switch assembly is connected to the photovoltaic cell panel, and the other end thereof is connected to the direct-current bus, and the switch assembly is used for controlling a grid connection mode of the photovoltaic cell panel. When the switch assembly is turned off, the photovoltaic cell panel is connected to the direct-current bus by means of the DC/DC converter; and when the switch assembly is turned on, the photovoltaic cell panel is directly connected to the direct-current bus.

Abstract: An optical fiber sensing method and sensing system for straightness of the scraper conveyor is provided.

Abstract: The present invention relates to a working system, including at least one fastened rope node, at least one mobile rope node, and at least one suspended rope node. The three nodes are connected by using a rope, the fastened rope node is fastened to a surface of a building, the suspended rope node includes at least one working apparatus, and the working apparatus works on a side facade of the building. The mobile rope node can move on the building and change a suspension position of the suspended rope node. In the present invention, safety of a facade working robot is improved, and a working scope is expanded.

Abstract: The present disclosure discloses a control method for an energy storage system and apparatus, an energy storage system, and an energy storage device. The control method includes obtaining an operation parameter of a power grid and an electric quantity state of an energy storage battery in an energy storage system; and controlling working states of the power grid, the energy storage battery, a first auxiliary power supply, and a second auxiliary power supply according to the operation parameter of the power grid and the electric quantity state of the energy storage battery.

Abstract: An optical fiber sensing method and sensing system for straightness of the scraper conveyor is provided.

Abstract: The present disclosure relates to an air conditioner pipeline device and an air conditioner. The air conditioner pipeline device includes a gaseous refrigerant connecting pipe and a liquid refrigerant connecting pipe which are configured to be connected between an indoor unit and an outdoor unit of the air conditioner. At least one of the gaseous refrigerant connecting pipe and the liquid refrigerant connecting pipe adopts a multi-layer pipe. The multi-layer pipe includes at least two conductive pipes, sequentially and coaxially sleeved along a radial direction of the multi-layer pipe and configured to be connected to a power supply of the air conditioner to transmit power to the air conditioner, where an internal area of the innermost layer of conductive pipe is used for a refrigerant to flow; and first insulating layers, configured to achieve insulation of at least two conductive pipes.

Abstract: The present disclosure provides a current transformer, a method for distributing electric energy using the same, and an electric energy distribution system, and relates to the technical field of household appliances. The method includes: calculating distribution coefficients of energy required for loads according to the number of the loads and rated energy demands of the respective loads; acquiring energy demand ranges of the loads; and distributing energy to the loads according to the energy demand ranges and the distribution coefficients based on energy of a power supply end.

Abstract: The present disclosure provides a method and device for detecting insulation impedance of a photovoltaic inverter.

Abstract: The present disclosure discloses a control method for an energy storage system and apparatus, an energy storage system, and an energy storage device. The control method includes obtaining an operation parameter of a power grid and an electric quantity state of an energy storage battery in an energy storage system; and controlling working states of the power grid, the energy storage battery, a first auxiliary power supply, and a second auxiliary power supply according to the operation parameter of the power grid and the electric quantity state of the energy storage battery.

Abstract: Disclosed are a photovoltaic electric appliance and a charging control method, device and circuit thereof, and a storage medium. The charging control circuit includes: a double-relay circuit and a charging relay circuit, wherein the double-relay circuit is arranged between a grid side circuit and a machine side circuit of the photovoltaic electric appliance; and the charging relay circuit is configured to turn on to realize the gradual charging of a bus capacitor when the double-relay circuit is not turned on. A charging relay circuit is added to an alternating-current power supply side, so that when double relays are not closed, a charging relay can be closed to realize the gradual charging of a bus capacitor.

Abstract: Provided by the present application are a Direct Current (DC) micro-grid system, a charging loop circuit and a control method thereof. The charging loop circuit selectively connects a charging loop to a first side loop or a second side loop through a set of switches.

Abstract: A photovoltaic air conditioner control method and apparatus and a photovoltaic air conditioner. The method includes: detecting in real time the grid-connected side inverter module temperature and the grid-connected side current of a photovoltaic air conditioner; determining the interval in which the grid-connected inverter module temperature is located and the interval in which the grid-connected side current is located; and, on the basis of the determining results, performing frequency-limiting and frequency-reduction control of the photovoltaic air conditioner.

Abstract: Systems and methods are provided. A physical measurement of the core loss increase associated with a physical deformation of a material of the device is obtained. A data structure describing a model of the device is accessed. A first edge of the model of the device associated with a physical deformation of the device is identified. A finite element mesh is generated to include a single layer mesh comprising a plurality of mesh elements associated with the first edge of the finite element mesh. A core loss value is assigned to each of the plurality of mesh elements. Each of the core loss values representative of the physical measurement of the core loss increase of the material as a result of the physical deformation of the material. An electromagnetic model is generated by performing a finite element analysis based on the finite element mesh and the single layer mesh.

Abstract: A photovoltaic air conditioning system startup method, a controller, and a photovoltaic air conditioning system. The photovoltaic air conditioning system starting method includes: when a photovoltaic device meets a preset power generation condition, controlling a bidirectional converter to enter an operating state; and when the bidirectional converter enters the operating state, controlling a direct current-direct current converter connected to the photovoltaic device to enter an operating state, so that the photovoltaic device provides electric energy to an air-conditioning device by means of the direct current-direct current converter.

Abstract: The present disclosure relates to an air conditioner pipeline device and an air conditioner. The air conditioner pipeline device includes a gaseous refrigerant connecting pipe and a liquid refrigerant connecting pipe which are configured to be connected between an indoor unit and an outdoor unit of the air conditioner. At least one of the gaseous refrigerant connecting pipe and the liquid refrigerant connecting pipe adopts a multi-layer pipe. The multi-layer pipe includes at least two conductive pipes, sequentially and coaxially sleeved along a radial direction of the multi-layer pipe and configured to be connected to a power supply of the air conditioner to transmit power to the air conditioner, where an internal area of the innermost layer of conductive pipe is used for a refrigerant to flow; and first insulating layers, configured to achieve insulation of at least two conductive pipes.