89results about How to "Security supply" patented technology

An apparatus for detecting a failure of a battery includes a plurality of cell internal pressure sensors each provided in a corresponding one of a plurality of battery cells to measure internal pressure of the battery cells and generate and transmit pressure signals, a sensing unit for receiving the pressure signals to sense the internal pressure of the battery cells, a control logic unit for receiving the internal pressure data of each of the battery cells and determining a battery cell having cell internal pressure outside of a predetermined normal range of internal pressure of the battery cell as a failed cell, and a battery control unit for controlling charging or discharging of the other battery cells of the battery except for the failed cell while the failed cell is being repaired or replaced.

A key delivery apparatus that prevents improper use of contents, and manages a decryption key for decrypting encrypted content and a suppliable number showing how many times the decryption key is suppliable, with respect to one or more terminal apparatuses connected to a network. The key delivery apparatus receives a supply request for the decryption key from a terminal apparatus, and if the terminal apparatus is a legitimate supply target, judges whether the terminal apparatus is a first-type that manages a content-usage period or a second-type that does not manage the content-usage period, and if the suppliable number has a remaining number, supplies to the terminal apparatus, the decryption key and a key-usage period of the decryption key when judged that the terminal apparatus is the first-type and the decryption key when judged that the terminal apparatus is the second-type.

A container valve, attached to a gas container, wherein the container valve has a pressure reducing function, and is inside a valve block in the gas container. In the valve block, the container valve comprises a gas filling passage in which a filling valve is installed, a gas lead-out passage in which a lead-out valve is installed, and a pressure regulator arranged at an upstream side of the lead-out valve in the gas lead-out passage. The container valve can safely supply gas under a reduced pressure for use by opening the container valve of a container whose pressure is high and gas can be filled easily into the container. The container valve can be miniaturized and the purging operation for supplying high purity gas can be performed.

A switching power supply for achieving a constant current drooping characteristic of sufficient accuracy with low cost and the minimum number of components. In the switching power supply, a secondary duty limiter circuit outputs a clock signal from the time a switching element is turned off until the time the on duty of secondary current, which starts flowing to a secondary winding of a transformer, is fixed at a predetermined value. A clock signal selector circuit selects and outputs the clock signal when a load increases and the on duty of the secondary current reaches the predetermined value. Consequently, when the load increases, a direct current output voltage decreases and an output characteristic becomes a constant current drooping characteristic. At this point, when the voltage of an element current detection signal reaches an overcurrent protection reference voltage, a drain current control circuit outputs a turn-off signal for determining the turn-off of the switching element, therefore the peak current of the secondary current is kept at a fixed value.

The invention provides a thermal energy storage and heat exchange unit, comprising a solid state thermal storage material, a heat transfer fluid and means for energy input and output, distinctive in that: the storage comprises at least one heat transfer container, solid state thermal storage material is arranged around the heat transfer container, and the heat transfer container contains the heat transfer fluid and the means for energy input and output, so that all heat transferring convection and conduction by the heat transfer fluid takes place within the respective heat transfer container. Method of building the thermal energy storage, plant comprising the storage, method using the plant and use of the storage or plant.

The invention discloses a control system and method of an air compressor unit. The system comprises a pressure sensor, an active/standby conversion switch, a first contactor, a second contactor and a programming controller, wherein the pressure sensor is arranged in an air transportation pipeline and is connected with the programming controller; the active/standby conversion switch is connected with the programming controller and is used for switching active/standby relation of a first air compressor and a second air compressor; the first air compressor is connected with a power supply by the first contactor, the second air compressor is connected with the power supply by the second contactor; and the programming controller is connected with the first contactor and the second contactor and is used for controlling the operation of the first air compressor and the operation of the second air compressor according to the size of the pressure value collected by the pressure sensor and the size of the preset value. When the system operates, as delay time is set for starting and stopping of the active/standby air compressors and the time coordination is rational, the problem of frequent starting and stopping of the air compressors owning to great nitrogen pressure fluctuation can be solved and the service lives of the air compressors can be improved.

An apparatus, system, and method are disclosed for safely connecting a device to a power source. The invention includes a power bus switch that operates to selectively allow operational power to flow from a power supply to a load. The operational power is independent of auxiliary power which may be separately provided to the load. A detection module determines whether an input impedance of the load is greater than a minimum impedance threshold in response to the load being connected to the power supply. A switch module causes the power bus switch to allow operational power to flow to the load in response to the detection module determining that the input impedance is greater than the minimum impedance threshold. Thus, if the load has an acceptable input impedance level, then operational power may be provided to the load without risk of failure to the power system.

The invention discloses an animal excrement harmless resource utilization intelligent treatment system and method. The system comprises a roller sieve filtering device, a fast mixing device, an anaerobic fermentation device, a marsh gas collecting device, a gas purification assembly, a gas storage device and a solid-liquid treatment assembly, wherein the roller sieve filtering device is used for removing impurities in animal excrement; the fast mixing device is used for mixing the screened animal excrement with stalks subjected to biological fermentation; the anaerobic fermentation device is used for performing anaerobic fermentation on the mixed materials; the marsh gas collecting device is used for collecting marsh gas generated in the anaerobic fermentation device; the gas purificationassembly is used for performing desulfurization, dewatering and decarburization treatment on the marsh gas collected by the marsh gas collecting device; the gas storage device is used for performing constant pressure storage on the gas purified by the gas purification assembly; the solid-liquid treatment assembly is used for separating biogas slurry and biogas residue after the fermentation, preparing the treated biogas slag into organic fertilizer, and preparing the treated biogas slurry into liquid fertilizer. The animal excrement harmless resource utilization intelligent treatment system and method have the advantages that multiple functions of excrement fermentation, marsh gas production, organic fertilizer preparation and the like are integrated; the technical process is shortened; the efficiency is greatly improved; meanwhile, a yield increase novel path is also developed for people in regions with developed breeding industry.

A power supply apparatus with a safety disconnect and a method of operating the power supply apparatus. A grounding sensor detects whether a frame ground of the power supply is connected to an external grounding point and shuts down output power if the frame ground terminal is not connected to the external grounding point. A neutral rectifier rectifies an output voltage of a voltage stabilizer and a voltage comparator outputs a non-grounding signal of a predetermined level if an output voltage of the neutral rectifier is lower than a predetermined criterion voltage. A switching part shuts down output power in response to the non-grounding signal.

The invention discloses special-shaped pipe fitting welding equipment. The special-shaped pipe fitting welding equipment comprises a workbench, a high-frequency sensing heating unit, an image measurement unit, a mechanical positioning and clamping unit, an exhaust fan and a control cabinet, wherein the exhaust fan is installed behind the mechanical positioning and clamping unit, the mechanical positioning and clamping unit is arranged in the middle of the tabletop of the workbench, and a PLC is installed in the control cabinet. The special-shaped pipe fitting welding equipment is applicable to assembling small-size special-shaped pipe fittings according to a soldering method, and the problem that high assembly accuracy can not be achieved when the positioning standard is not ideal is solved by the adoption of image measurement and positioning; meanwhile, errors caused by clamping force in the welding and heating process are compensated for conveniently and rapidly, welding accuracy is improved, and thin-wall positions of a part can be effectively prevented from collision deformation in the assembly or disassembly process.

The invention discloses an electricity-gas combined market distributed clearing method based on an alternating direction multiplier method, and the method comprises the steps: building an electricity-gas combined market centralized clearing model through taking the minimum total cost of all-day electric energy and natural gas as a target; based on an alternating direction multiplier method, dual variables are introduced to equivalently decompose the centralized clearing model into a natural gas market clearing sub-model and a power market clearing sub-model; and alternately solving the naturalgas market clearing sub-model and the power market clearing sub-model and updating the dual variables until a convergence criterion of the alternating direction multiplier method is met, thereby obtaining a distributed day-ahead clearing result of the electricity-gas joint market. The actual situation that the power system and the natural gas system operate independently is considered, the distributed efficient clearing method is provided, and comprehensive utilization and efficient configuration of power and natural gas are promoted.

A blast furnace head (11) including a material loading device comprising rotary chute (14) driven in rotation about a first, vertical axis of rotation (16), and a loading chute (15) at the outlet of same, driven in rotation about a second, vertical axis of rotation (17) laterally offset relative to the first axis of rotation (16). The gears (20, 21) assigned to both of the chutes (14, 15) are arranged within a sealing chamber (22). Within this sealing chamber (22), a means (28) is arranged for supplying integrated measuring devices (29 or 30), lubrication points or similar maintenance recipients, with these supply means (28) being drivable by one of the gears (20, 21) assigned to the two chutes, in particular by the gear (20) assigned to the rotary chute (14).

The invention provides a hopper type material distribution device for a sealed calcium carbide furnace and an automatic control method. The automatic control method is characterized in that automatic material distribution is conducted in the calcium carbide furnace production process according to the material level conditions of silos arranged on a furnace roof of the calcium carbide furnace, and meanwhile hoppers are subject to automatic material supplementation according to the material level conditions of the feeding hoppers of a distributor. The core thought is that a processor judges whether the silos are short of materials according to the material level conditions of all the silos arranged on the furnace roof of the calcium carbide furnace, and the material storage conditions of the hoppers of the distributor are collected; automatic blanking is conducted when the silos are short of materials and the material storage conditions of the hoppers of the distributor meet the material supplementation condition, and if the material storage conditions of the hoppers of the distributor do not meet the material supplementation condition, materials are added into the hoppers until the material supplementation conditions are met, and then material supplementation operation is conducted; all the hoppers are filled with materials when no silos on the furnace roof needs material supplementation, and the steps are cycled. The annular material distribution device is safe, stable and high in automation, and can achieve unmanned automatic feeding of the silos arranged on the furnace roof of the calcium carbide furnace.

The invention discloses an online structure and parameter identification method for a dynamic power load model. The method comprises the steps of 1, establishing a dynamic power load model structure library, which comprises at least two dynamic power load model structures; 2, reading the dynamic power load model structures in the dynamic power load model structure library in parallel, forming extended state vectors by to-be-identified parameters and state vectors of the dynamic power load model structures, and estimating the to-be-identified parameters by utilizing unscented Kalman filtering; 3, calculating posteriori probabilities of the dynamic power load model structures; and 4, comparing the posteriori probabilities of the dynamic power load model structures, taking the dynamic power load model structure with the highest posteriori probability as an optimal dynamic power load model structure, and taking a parameter identification result of the dynamic power load model structure as an optimal parameter. According to the method, dynamic power load characteristics are more accurately described from two aspects of the model structures and parameters through simultaneous online identification of the model structures and parameters.

The invention belongs to the technical field of factory gas supply systems, and particularly relates to a multi-gas supply system of a workshop gas supply station. The multi-gas supply system comprises a gas supply device, a conveying device and a control device, the gas supply device is communicated with the conveying device which comprises a pipe, a pressure adjusting valve, a gas inlet, a gas outlet and an air exhausting device; the control device comprises a monitor, a lightning protection device and a propane alarming device; an oxygen and argon supply device comprises a low-temperature storage tank, a vaporizer, a pressure adjusting valve, a mixed gas matching cabinet and a buffer tank; a welding mixed gas supply device comprises a low-temperature storage tank, a vaporizer, a pressure adjusting valve, a mixed gas matching cabinet and a flowmeter; a propane gas supply device comprises a busbar, an automatic switching device, a gasification device and a gas-liquid separation device; a compressed air supply device comprises an air compressor, a drier, a filter and a gas storage tank. By means of the technical scheme, multiple gases can be supplied to a factory for use; meanwhile, whole-process monitoring can be achieved. Total supply safety of the gas supply system is achieved.

A direct-current voltage supply circuit includes a first field effect transistor in a power line, a voltage divider including a first fixed resistor and a positive temperature coefficient thermistor between the power line and a ground line, a thyristor connected at an anode thereof to the power line, with a second field effect transistor interposed therebetween, connected at a gate thereof to a node in the voltage divider, and connected at a cathode thereof to the ground line, with a second fixed resistor interposed therebetween, and a third fixed resistor connected in parallel with the thyristor and the second field effect transistor. If abnormal heating increases the resistance of the positive temperature coefficient thermistor, the first field effect transistor is turned off and the supply of direct-current voltage is stopped.