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 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.

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 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.

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.