37results about How to "Improve maintenance-free" patented technology

The related self-powered minimize wireless sensor network node for state monitor based on piezoelectric vibration comprises: a piezoelectric vibration power 1 including a long-term storage capacitor 10, a DC / DC converter 9, a voltage stabilizing tube 8, a voltage multiplier 7, and a piezoelectric transducer 6; a microcontroller 4 to operate the power supply of capacitor 10 to device 3 through a controlling switch 6, a RF transmitting device 3, and a sensor 5. Besides, the microcontroller 4 also processes data from sensor 5 and transmits result and control information together to device 3. This invention minimizes node power consumption.

The invention discloses a method for monitoring motor temperature. The method comprises the following steps: arranging n temperature sensors for detecting the current temperature T of a motor, wherein, n is not less than 2; reading detection data from the n temperature sensors; and obtaining the current temperature T of the motor on the basis of the detection data from the temperature sensors which normally work in the n temperature sensors. The invention further provides a method for controlling motor power. The method comprises the following steps: obtaining the current temperature T of the motor by utilizing the method for monitoring motor temperature; judging temperature range of the current temperature T of the motor according to the current temperature T of the motor and a predetermined motor temperature range threshold; and setting the maximum output power of the motor according to the temperature range of the current temperature T of the motor. By utilizing the method for monitoring the motor temperature and the method for controlling the motor power, the current temperature of the motor can be effectively and reliably obtained, and reliably and maintenance-free performance of the motor can be improved.

The invention provides a tyre filled with compound elastomer material and a preparation method thereof. The method comprises the steps: filling pretreated rubber into an inner cavity of the tyre; installing a wheel felloe; mixing prepolymer component A and assistant agent B of polyurethane, and injecting the component A and the component B into the inner cavity of the tyre by pressurizing equipment by an air nozzle; filling gaps among rubber granules; thoroughly filling to enable the pressure to achieve the specified requirement of the tyre; keeping the pressure of a sealing air nozzle and curing the polyurethane material to obtain a product. The tyre filled with the compound elastomer material has the advantages of better buffering performance, longer service life, anti-exploding performance, anti-puncture performance, inflation-free performance, maintenance-free performance, high carrying capability and the like of an ordinary solid tyre and is especially suitable for use under special conditions such as mines, quays and the like.

The invention aims to provide a temperature detection and analysis method of a vehicular motor controller with high reliability, so that the measured MCU (microprogrammed control unit) temperature can be close to a real value to the maximal extent, and the MCU is protected according to temperature data, so as to reduce maintenance frequency of the system. In the temperature detection and analysis method of the vehicular motor controller, a motor control system utilizes at least two temperature sensors to collect temperature of a drive module, arranges all temperature data collected by the temperature sensor, eliminates the data with the maximal deviation, and finally controls the output power of the drive module according to the preserved temperature data. Temperature misjudgment due to the fact that one temperature sensor cannot normally work or the measurement deviation is large can be avoided through the temperature sensor with redundancy design, so that the reliability of collection of the MCU temperature data can be ensured, and the measured temperature data can be close to the real value to the maximal extent.

The invention relates to an energy obtaining circuit for series-connected IGBT dynamic voltage balancing control. The energy obtaining circuit comprises an RCD buffer circuit energy obtaining circuit and a static resistor energy obtaining circuit, wherein the RCD buffer circuit energy obtaining circuit obtains energy from a capacitor of an RCD buffer circuit connected with an IGBT in parallel, and the static resistor energy obtaining circuit obtains energy from a static resistor connected with the IGBT in parallel. The RCD buffer circuit energy obtaining circuit and the static resistor energy obtaining circuit respectively achieve collected output through an output diode. Switching losses of the IGBT are converted into electric energy necessary for control systems. According to the energy obtaining circuit, a stable direct current power supply is provided, the control circuit complexity degree and cost are reduced, system stability is improved, meanwhile, the impact of overvoltage and large current on a device is reduced, switching losses of the device are reduced, the buffer effect of the series-connected IGBT buffer circuit is improved, switching losses and temperature rise of the device are reduced, and system efficiency is improved.

The invention relates to a cable intermediate joint wireless temperature sensing device based on electromagnetic resonance. A host possesses wireless power supply and Bluetooth communication capabilities, launches electromagnetic waves to the passive wireless communication temperature sensor in a cable intermediate joint, and organizes temperature data to be standard rules when receiving Bluetooth signals from the passive wireless communication temperature sensor, the standard rules being sent to an Internet network and finally arriving at a server, thereby realizing the management of intelligent on-line monitoring equipment. The cable intermediate joint wireless temperature sensing device employs an electromagnetic resonance principle and a Bluetooth data communication form to realize sensor passive power supply and wireless data acquisition, and makes installation more convenient and faster; the cable intermediate joint is safer in an on-line monitoring process, and collects data more efficiently.

The invention discloses a cascading video device and a data processing method thereof, and relates to the field of video monitoring. The cascading video device comprises a cascading video main unit (110), a cascading video auxiliary unit (120), a network interface (101), a PCI bus (102) and a BT1120 bus (103). The network interface (101), a cascading main CPU (113), the PCI bus (102), a cascading auxiliary CPU (123), the BT1120 bus (103) and the cascading main CPU (113) are connected in sequence. The cascading video device and the data processing method thereof have the advantages that the cascading video device has high reliability and is free of maintainability under the unattended situation and can process system faults in time, the device fault recovery time is shortened, and the timeliness and smoothness of decoded pictures of the cascading video device can be improved.

The invention relates to a control system for reducing the voltage unbalancedness of a direct current bus series capacitor of an energy storage system bidirectional converter. By aiming at the problem that the voltage unbalancedness of the direct current bus series capacitor can be possibly generated after the energy storage system bidirectional converter operates for a long time, voltage balance compensation control strategies are adopted for guaranteeing the long-period, safe and stable operation of the energy storage system bidirectional converter. Through the adoption of the method, the voltage unbalancedness of the series capacitor can be effectively reduced, the free maintenance of the converter is enhanced, the uninterrupted operation capability of the converter is improved, and obvious economic benefits are realized.

The invention provides a carriage device with improved maintenance by suppressing the frequency of replacement of the parts of the bearing portion. The carriage device comprises a guide member; a carriage that reciprocates along the guide member; and a bearing member that is set on the carriage and is tangential with the guide member; the carriage device also comprises a mechanism that can make the bearing member displace relative to the carriage; and the tangential position of the bearing member and the guide member changes due to such displacement.

The invention discloses a box-type substation remote control system which comprises a network structure. The system is characterized in that the network structure comprises an on-site module, a communication module and a management module which are connected in sequence. The on-site module is an instrument which is arranged in a box-type substation and used for collecting electric quantity and non-electrical-quantity data of the box-type substation; the communication module comprises a communication server and a wireless GPRS modem, wherein the communication server collects, in a concentrated manner, the data collected by the on-site module and utilizes the wireless GPRS modem to transmit the data to the management module through a GPRS network; and the management module is a mobile data terminal. According to the application examples of the box-type substation remote control system based on the GPRS network in an intelligent box-type substation monitoring system, the problem of difficult wiring in monitoring the box-type substation is successfully solved, and communication of the remote monitoring system is realized, so that on-site states can be known in time, and abnormities and accidents can be handled in time, and workload of monitoring of labors is reduced.

A current low-voltage distribution network measurement and control system has the problems that a low-voltage distribution area is large in scale, wide in range and large in quantity, existing terminal collection and monitoring are lack of unified planning, design and standards, collected data are various in type and different in source, unified internet-of-things management cannot be achieved, so that the utilization rate of software and hardware resources of the platform is low, and demand response changes are insufficient. Therefore, the invention provides a low-voltage Internet of Things distribution network data processing method based on the edge computing technology, and the method comprises the steps: carrying out the standard storage of the data of a power distribution area, carrying out the preprocessing of the summarized data, forming an edge data platform, and carrying out the preset data analysis and processing of different types of data, and based on a predefined rule and a data analysis result, locally performing strategy execution or forwarding the data to a cloud end or other edge computing nodes for processing, and finally visually displaying and storing the data.

The invention is the automobile load sensing device and belongs to the self-recognition system of overloading technology. The invention comprises the extreme pressure rubber gas cell, the main pressure sensor, the assistant pressure sensor, the primary signal transmitting cable, the primary signal transmitting redundant cable, the secondary signal transmitting cable, the secondary signal redundant cable. The extreme pressure rubber gas cell conveys the sensed pressure to the main and the assistant pressure sensors in the sealed chamber; the output signals of the main and the assistant sensors are led separately by the primary and the secondary signal transmitting cables; the primary and the secondary redundant cables are separately the repeating channels of the primary and the secondary transmitting sensors. The invention has stable and reliable operation.

The invention discloses a high-pressure gas mist linkage automatic fire extinguishing system. A high-pressure water supply system comprises a water path connecting a water source, a filter, a first electric control valve and a water tank in sequence; a primary water supply pipeline is connected to the bottom of the water tank and connected with a secondary water supply pipeline through a pipeline provided with a high-pressure pump and a check valve; the secondary water supply pipeline provided with a pressure sensor is connected with a main pipeline of a flow sensor through a second electric control valve; a high-pressure nitrogen system comprises a gas path connecting a high-pressure gas source, a pressure regulating valve, a third electric control valve and a mass flow meter in sequence; the tail end of the gas path is connected with the main pipeline; a plurality of nozzles are connected to the tail end of the main pipeline through a plurality of branch pipes; a smoke sensor and a temperature sensor which are connected with an alarming device are mounted at the tail end of the main pipeline; and a drain valve and a liquidometer are mounted in the water tank. Large-particle-size water drops are prevented from being formed when fire extinguishing with high-pressure fine water mist is completed, secondary disasters to protected substances are reduced, and the environment pollution is avoided.

The invention discloses a rare earth grid alloy for lead-acid storage batteries. The rare earth grid alloy for lead-acid storage batteries comprises the following raw materials in percentage by weight: 0.05-0.15% of Ca, 0.8-2.0% of Sn, 0.01-0.05% of Al, 0.01-0.02% of Ag, 0.05-0.15% of rare earth element and the balance of Pb, wherein the rare earth element may be one or more of Nd, Y and Sm. The rare earth element added to the grid alloy improves the corrosion resistance of the alloy, prolongs the cycle lives of the storage batteries, strengthens the charge receptivity of the batteries, and obviously improves the early capacity loss phenomenon of the batteries.

The invention provides a process method for concentrating light salt brine by adopting a five-effect down-flow evaporation process, and the method comprises the following steps of: firstly, heating feed salt brine by adopting live steam, taking generated secondary steam as a heating source of the next effect, and so on, thus achieving the purpose of concentrating light salt brine. The process method provided by the invention is low in energy consumption and small in investment, and by controlling reasonable operation pressure difference among all the effects, the design parameters of the first four-effect falling film evaporator equipment are consistent, so that the design and manufacturing period is greatly shortened; the evaporator of each effect is provided with a backflow control pipeline, so that the operation flexibility is high; the inter-effect condensate directly enters the shell pass of the next-effect evaporator to recover heat by reasonably arranging the pipe orifice height difference and a manual control valve, so that an inter-effect condensate tank and a condensate delivery pump are omitted; a large-flow forced circulation process is adopted in the fifth effect, a large amount of light salt brine can be effectively and rapidly concentrated to a nearly saturated state, and the crystallization phenomenon in the evaporation process is prevented.

The invention belongs to the technical field of power equipment, and discloses a transformer substation in order to solve the problem that an existing transformer substation is large in occupied area.The transformer substation comprises a container, a high-voltage equipment system, a ventilation system, a transformer, an auxiliary system pipeline, a low-voltage equipment system and a fixing device; and the high-voltage equipment system comprises a high-voltage switch cabinet, and the high-voltage switch cabinet is an insulating switch cabinet. The transformer substation is small in occupied area, simple in equipment and convenient to maintain.

The invention belongs to the technical field of public facilities and particularly relates to a novel intercept lifting lever. The novel intercept lifting lever comprises a transverse rod and a lifting device fixed to the lower side of one end of the transverse rod. The lifting device comprises an electromotor, a transmission device and a wireless sensor matched with an external remote control. The lifting device is arranged in a fixing base. The novel intercept lifting lever is characterized in that the transverse rod is fixedly connected with the transmission device through a spring, one side of the fixing base is provided with a sound controlled lamp, and the sound controlled lamp is connected with the wireless sensor. The novel intercept lifting lever is simple in structure and convenient to use; one side of the lifting device is provided with the sound controlled lamp, so that convenience is provided for pedestrians, and potential safety hazards are reduced; the transverse rod is fixedly connected with the transmission device through the spring, energy consumption of the electromotor is reduced, and the novel intercept lifting lever is consistent with the concepts of saving energy and protecting the environment.

The invention relates to a fuel cell system and a vehicle. The fuel cell system comprises an entire vehicle heat management and fuel cell system; the fuel cell system comprises an outer circulating pipeline and an inner circulating pipeline; the inner circulating pipeline and the outer circulating pipeline perform the heat exchange through a heat exchanger, an inner circulating pump and a deionizator are arranged on the inner circulating pipeline; on the one hand, the inner circulating pipeline is greatly reduced in comparison with the original circulating pipeline length, and the amount of the flexible metal pipes and the metal bend joints and reducing the production quantity of the lithium ion from the root, the burden borne by the deionizator is relieved, and the service life can be improved by 4-5 times; on the other hand, the energy transfer of the inner circulating pipeline and the outer circulating pipeline is uninvolved with the cooling liquid interchange, the ion produced in the outer circulating pipeline cannot enter the inner circulating pipeline and cannot cause burden on the deionizator, no matter how high the ion content in the outer circulating pipeline is, the ion cannot circulate and flow in the fuel cell, and the insulation performance of the fuel cell system cannot be greatly influenced.

The invention relates to a traction motor, in particular to a motor train unit traction motor. The problem that a ventilation structure of an existing self-ventilation traction motor is not suitable for an intercity motor train unit is solved. The traction motor is provided with a three-way ventilation structure. The motor adopts a split type junction box, and the three-phase cable is detachable under the condition that the cable gland is free of disassembly. High-capacity convex oil drainage cavities are formed in the two ends of the motor, and the service life of the bearing can be greatly prolonged under the normal grease supplementing condition. A compact sensor support with a detection window is arranged at the non-transmission end of the motor, the installation gap between a sensor probe and a speed measuring gear is convenient to check, an inner sinking type installation hole is adopted, an inner sinking type protective cover plate is matched, the axial assembly size of the sensor support is shortened, and the maintenance operation space of the non-transmission end of the motor is increased. Dust removal holes and stepped protective cover plates are arranged at the bottoms of the transmission end and the non-transmission end of the base to prevent water accumulation in the motor and timely remove foreign matters in the motor.

The composition of regeneratino source of lead-acid battery contains (wt%) 1-4% of phosphoric acid, 1.5-8% of calcium phosphate, 0.5-4% of carbonic acid, 6-26% of tartaric acid, 3-5% of EOTA, 8-16% of cadmium sulfate, 8-12% of magnesium sulfate, 10-20% of aluminium sulfate, 4-6% of calcium and 15-25% of distilled water. The above-mentioned raw materials are proportioned and added in the distilledwater, stirred for 65-70 min., dissolved to obtain liquid finished product, stored for 20 days, and can be used. Said invention can prolong service life of battery.

The invention discloses alloy capable of improving the creep resistance. The alloy capable of improving the creep resistance comprises the following raw materials in percentage by weight: 2 to 2.5 percent of Si, 0.01 to 0.03 percent of S, 25 to 33 percent of Cr, 25 to 33 percent of Fe, 6 to 8 percent of Co, 22 to 29 percent of Ni, 2.2 to 5.3 percent of Cu, 4.3 to 5.2 percent of Mo, 5.1 to 6.3 percent of B, 0.1 to 0.25 percent of C, 0.01 to 0.2 percent of rare-earth, 1.3 to 2.6 percent of Mg, 2.8 to 4.1 percent of Mn and 0.01 to 0.05 percent of Se. According to the alloy disclosed by the invention, through the addition of a rare-earth element-La and other elements, a crystal structure forming the alloy is changed, and the properties such as the plasticity and the stress resistance of the alloy are changed, so that the corrosion resistance and the creep resistance of a grid are improved, the maintenance-free performance of a battery is favorably improved, the polarization performance ofan electrode is improved, passivation of active matters is effectively reduced, the efficiency of redox reaction of lead plaster on different zones of the grid during a charging-discharging process ischanged, and the service life is prolonged.

According to the atmospheric online monitoring system and method for the coastal power transmission line, the collected SO2 gas concentration, oxynitride gas concentration, temperature, humidity, chloride ion concentration, PH values and early warning signals are transmitted to an APP terminal, so that monitoring personnel can open the APP terminal anytime and anywhere for online real-time checking. Therefore, the real-time performance of monitoring is improved. Besides, high voltage can be obtained in the coastal power transmission line through electromagnetic induction by a current transformer, and then the high voltage is discharged to preset working voltage through a voltage conversion module, so that an extra power supply is not needed, the power supply mode is not influenced by weather conditions, the voltage is relatively stable, the weather resistance is high, and the maintenance-free capability is improved, and the operation and maintenance cost is reduced.

The invention belongs to the technical field of network time management, and particularly relates to a time management method based on a WEB browser, which is technically characterized by comprising aclient and a WEB server. Time management functions of millisecond-level precision time synchronization, time deviation monitoring, event time scale recording and query and the like are realized for terminals deployed in a distributed manner in a wide area network on the basis of general WEB browsers such as IE (Internet Explorer), home, firefox and the like; the time displayed by each terminal onthe WEB browser is ensured to have high precision, high availability and maintenance-free performance; and when the system time of each terminal operating system is changed, the time for synchronizing the local time to the WEB server can be automatically identified and corrected, so that the accuracy of command in military actions and the coordination degree of multi-department linkage are ensured.

The invention provides a rotational-flow solid-liquid separation and water level control device capable of automatically cleaning a filter screen and used for a fishpond. The device comprises a rotational flow box, a filter screen, a water level controller, a filter screen scourer, a sediment deposition box, a pipeline and a valve, wherein the rotational flow box is of a box-shaped structure; the filter screen is fixedly mounted at the top end of the rotational flow box and is used for filtering sewage supernate of the rotational flow box; the water level controller comprises a water control box, an insertion pipe and a sensor, the water control box is of an inward-concave cylindrical box type structure and is installed on the upper portion of the rotational flow box in a sealed mode, a cavity of the water control box is isolated from a cavity of the rotational flow box through a filter screen, and the insertion pipe is installed at the bottom of the water control box and moves underwater relative to the water control box to control the water level of the water pool; the sensor is installed on the inner wall of the water control box, and when the filter screen is blocked by pollutants, the filter screen scourer is started to clean the filter screen; and the sediment deposition box is an inverted conical box body and is used for depositing precipitates in the sewage. According to the rotational-flow solid-liquid separation and water level control device capable of automatically cleaning the filter screen and used for the fishpond, residual feeds in the fishpond and excrement cleaning and water level control of the fishpond can be achieved.