310results about How to "Self-powered" patented technology

The invention discloses a submersible buoy for ocean observation, which comprises a cable arranged vertically, and a first temperature-salt chain, a second temperature-salt chain, a first microscale fixed-point turbulence meter, a second microscale Scale fixed-point turbulence meter, main floating body and seat body; the seat body is arranged on the top of the cable, and the seat body is equipped with a plurality of solar cells as power supply; the first temperature-salt chain and the second temperature-salt chain are both Including temperature instrument, temperature and depth instrument and temperature and salt depth instrument, Doppler flow velocity profiler is installed on the main floating body, reciprocating micro-scale turbulence profiler is installed in the middle of the cable, and high-precision temperature and salt depth instrument and single-point type are installed in the lower part. Current meter; the side wall of the main buoy is provided with a plurality of satellite communication buoys for transferring observation data, and the satellite communication buoys are connected to the main buoy through a timing release device; the submersible buoy for ocean observation can realize the Observation data can be obtained regularly before recovery, which is very practical.

The invention discloses a pressure sensor based on friction power generation and a pressure sensing system. The pressure sensor based on friction power generation comprises a pressure bearing component, a first elastic base body, a first structural layer, a base and a second structural layer, wherein the first elastic base body is arranged on a first side surface of the pressure bearing component and is provided with a regular protruding structure, the first structural layer covers the first elastic base body and forms a corresponding structure matched with the protruding structure of the first elastic base body, and the second structural layer is arranged on a first side surface of the base. When pressure is acted on the pressure bearing component, the first elastic base body and the first structural layer deform so as to enable the contacting area of a friction interface to be increased along with the increase of pressure, and a corresponding relation between the contacting area and output signals is utilized to enable the output signals of a signal output end to represent the intensity of pressure. The pressure sensor based on friction power generation overcomes the defect that a traditional pressure sensor is easily interfered by static electricity and electromagnetism, and has the advantages of being high in accuracy, wide in measurement range and wide in application environment.

The invention discloses a semi-submergible breeding net cage, and particularly relates to an anchor type self-power semi-submergible breeding net cage which comprises a net cage frame and an anchoring mechanism. The anchoring mechanism is rigidly connected with the net cage frame, the net cage frame is of a triangular prism-cuboid-triangular prism pieced octahedron structure, netting is laid on side vertical surfaces and the lower bottom surface of the net cage frame, mechanisms are arranged on the side vertical surfaces of the net cage frame, the netting can be conveniently collected and pulled by constructors by the aid of the mechanisms, S-shaped blades which can rotate under impact effects of sea current are mounted on two pairs of side vertical surfaces in current facing directions, and a power generator set for converting kinetic energy generated by the S-shaped blades into electric energy is mounted on the net cage frame. The anchor type self-power semi-submergible breeding net cage has the advantages that the 'wind-wave resistance of the anchor type self-power semi-submergible breeding net cage can be enhanced'; the anchor type self-power semi-submergible breeding net cage is high in sea current resistance and wind-wave impact resistance and long in service life; the breeding level of bred objects such as fish and shrimps can be upgraded by the anchor type self-power semi-submergible breeding net cage.

The invention discloses a self-powered magneto-rheological damper which has the advantages of being high in energy exchange efficiency, easy to manufacture, and the like. The self-powered magneto-rheological damper mainly comprises a cylinder barrel, a locating barrel, a compensation unit, a hollow coil and a permanent magnet. The locating barrel is arranged in the cylinder barrel and divides the cylinder barrel into a locating barrel upper cavity and a locating barrel lower cavity, the locating barrel upper cavity is filled with magneto-rheological liquid, and a piston, a piston rod and an energizing coil are arranged in the locating barrel upper cavity. The locating barrel lower cavity is filled with compensation gases, the compensation unit is arranged in the locating barrel, the hollow coil is arranged in the locating barrel lower cavity, and the permanent magnet is arranged in an inner cavity of the hollow coil and is fixedly connected with the compensation unit. When the piston does reciprocating movement, the compensation unit drives the permanent magnet to move in a reciprocating mode in the inner cavity of the hollow coil, and therefore mechanical energy is converted to electric energy.

The invention discloses an energy-self-feeding visible light wireless communication system. A computer sends signals to a signal sending modulation module which carries out modulation the signals and loads the signals to an LED direct-current driving power supply, so that the output current of the direct-current driving power supply comprises a direct-current component and a modulation current component. The direct-current component provides power for an LED light source. The modulation current component is correspondingly converted to changing of light intensity and is transmitted through free space. A silicon photocell array is used as a detector and receives light emitted by the LED light source, and light is converted into voltage. Silicon photocell array output voltage comprises a direct-current voltage component and an alternating voltage component. The direct-current voltage component provides power for a data storage and an amplifying demodulator circuit. The alternating voltage component carries out demodulation through the amplifying demodulator circuit, so that original signals are obtained in a restoring mode, and communication is completed. According to the energy-self-feeding visible light wireless communication system, an external power supply is of no need, light energy reusing and system self energy providing are achieved, and the practical application of visible light communication can be well achieved.

The invention discloses a temperature measuring device of a machine tool. The temperature measuring device comprises a temperature sensor, a conditioning circuit and a power supply, wherein the temperature sensor is used for collecting the temperature of the machine tool; the conditioning circuit is used for processing the output signals of the temperature sensor; the temperature measuring deviceis provided with a vacuum heat insulation sleeve which is used for packaging the temperature sensor; and the vacuum heat insulation sleeve is fixed on the machine tool through a magnetic connection piece. According to the invention, the influences to the temperature sensor by the neighboring environment temperature variation are prevented through the vacuum heat insulation sleeve, thus the accurate measurement of the temperature of the surface to be tested is realized; electricity is supplied for a radio transmission module and a conditioning circuit board through a thermoelectricity power generation module, the use of a battery is prevented, the compact volume of the whole temperature measuring device of the machine tool is ensured, and the using of the self-power-supply mode is more environmentally friendly; and the technical problems that the connection wire is easy to snap or the inner part of the connection wire is cracked in the existing connection mode are solved through the radio transmission module.

The invention discloses a voltage doubling synchronous rectification multi-resonance soft switch converter circuit which comprises a resonant inductance L1, a resonant capacitance Cp1, an excitation inductance Lm, an auxiliary inductance L2, an auxiliary capacitance Cp2, current transformators CT1 and CT2 as well as synchronous rectifying tubes SR1 and SR2; and transformer secondary side adopts a voltage doubling synchronous rectification circuit. Based on the traditional LLC converter, the invention is added with the L2 and Cp2, so as to change the impedance characteristic of a resonant unit and introduce impedance pole. Impedance is increased rapidly near the pole frequency, so that the gain adjustment range is expanded, and the converter can adapt to voltage range application with wide input or output; and the voltage doubling synchronous rectification circuit can reduce the voltage stress. The invention has simple circuit structure, high efficiency, easy implementation, convenient use as well as practical value and economic benefit.

The invention discloses a self-powered micro-fluidic chip and a manufacturing method thereof. A piezoelectric one-dimensional nano-material is utilized to collect tiny mechanical energy in the environment and convert the tiny mechanical energy into electric energy, and the electric potential energy is output to a sensitive unit so as to build the self-powered micro-fluidic chip. The micro-fluidic chip is divided into four layers, the undermost layer is a quartz glass substrate, a layer of exploring electrode is arranged on the quartz glass substrate, a layer of KNN nanofibers is arranged on the exploring electrode, and the uppermost layer is a PDMS cover plate with a PDMS microchannel. The manufacturing method of the self-powered micro-fluidic chip comprises the following steps: photo-etching, sputtering and stripping a substrate to produce an exploring electrode, adopting the electrospinning method to prepare potassium sodium niobate nanofibers in a large area on the exploring electrode, and then performing bonding on a PDMS microchannel and the substrate.

The invention discloses a physiological monitoring sensing belt and a manufacturing method thereof, a physiological monitoring mattress and a monitoring system. The physiological monitoring sensing belt comprises a first friction power generation layer and a second friction power generation layer which are laminated, wherein a friction interface is formed between the first friction power generation layer and the second friction power generation layer; an insulating layer which wraps the first friction power generation layer and the second friction power generation layer; a conductive shielding layer which wraps the first friction power generation layer, the second friction power generation layer and the insulating layer; and a first lead-out electrode and a second lead-out electrode which act as the output electrodes of the physiological monitoring sensing belt. The physiological monitoring sensing belt has the characteristics of being self-powered, high in sensitivity, stable in output electric signals, easy to use and operate, randomly adjustable in size, low in mass, comfortable and convenient to use for a user, simple in structure and manufacturing technology, low in cost and suitable for large-scale industrial production. Meanwhile, the physiological monitoring sensing belt also has self-moisture-proof and self-shielding functions so that stability of the output electric signals can be increased and the service life can be prolonged.

The invention discloses a railway vehicle monitoring method, system and device, a storage medium and a processor. The method comprises the steps of monitoring parameters and / or state of a vehicle through a vehicle-mounted sensor cluster to obtain first monitoring data, and preprocessing the first monitoring data to obtain second monitoring data; and sending the second monitoring data to the vehicle-mounted gateway, the second monitoring data being processed into third monitoring data by the vehicle-mounted gateway, and sending the third monitoring data to a ground management platform by the vehicle-mounted gateway so that the ground management platform is enabled to monitor the parameters and / or the state of the vehicle. The technical problems that in the prior art, the monitoring efficiency of railway vehicles is low, and real-time monitoring cannot be achieved are solved.

The invention relates to a wave energy self-powered positioning type lifting ecobuoy and belongs to the field of marine ecobuoys. The wave energy self-powered positioning type lifting ecobuoy comprises a buoy body, a flow guide cover and a lifting device; a satellite antenna and a wind speed sensor are mounted at the top of the buoy body, a communication module, a linear power generator, a control module, a wave sensor, a battery and a motor are mounted in a cavity of the buoy body, and a tail vane and a screw propeller connected with a spindle of the motor are mounted at the tail of the buoy body; the flow guide cover is attached to the bottom of the buoy body for gathering wave flow; the lifting device is mounted below the flow guide cover, a cable reel mechanism is mounted in a shell of the lifting device, and the lifting device submerges and lifts the buoy by controlling the length of a rope. This buoy can be automatically controlled and adjusted through the control module controlling the lifting device according to marine conditions of a sea area of the buoy, can be self-powered with wave energy and is suitable for various complex marine conditions.

The invention discloses a self-adjusting piezoelectric wind energy collecting device capable of being started at low wind speed. The wind speed self-adjusting piezoelectric wind energy collecting device capable of being started at the low wind speed comprises an intensive air channel, an umbrella-shaped rectifying device, a fan and a triangular piezoelectric cantilever; the umbrella-shaped rectifying device which is installed in the middle of the air channel commonly constrain the wind speed and the wind direction with the intensive air channel; the wind speed after constraint through the intensive air channel and the rectifying device is increased and points to the edge of a fan impeller and accordingly the fan can be started under the low wind speed and the wind kinetic energy is converted to be fan mechanical energy; 3mm coincidence is formed between the fan impeller edge and the cantilever, so that the cantilever can be effectively beat after the fan is started; the cantilever is a bi-crystal piezoelectric cantilever with the phosphor bronze serving as a base plate and the upper surface and the lower surface being accompanied by PVDF (Polyvinylidene Fluoride) thin films; electric energy is generated when the cantilever deforms due to beat by the fan and accordingly the fan mechanical energy is converted to the electric energy.

The present invention discloses a power supply circuit of a switch power supply and a power supply method thereof. Through setting a power switch tube as a depletion type transistor, when a circuit is started, DC input voltage is used to charge a charging capacitor through the power switch tube such that the voltage rises to the starting voltage of a control chip. When the circuit works normally, through controlling the switch action of the power switch tube and a first switch tube, the charging voltage signal of the charging capacitor is maintained to the expected working value of the control chip. Compared with the prior art, the additional high voltage starting resistor and high starting transistor are not needed, the loss is greatly reduced, the self power supply can be realized, the power supply of a winding, a diode and other components is not needed, a peripheral circuit can be simplified, and the cost is reduced.

The invention provides a double-wire Hall current sensor. The double-wire Hall current sensor comprises a magnetic core, a double-wire cable, a Hall element, an energy acquiring coil and a current sensing circuit, wherein the magnetic core is an open-circuit magnetic core or a closed magnetic core; the double-wire cable is parallel with a central shaft of the magnetic core, so that magnetic induction lines generated by the double-wire cable are gathered inside the magnetic core; the Hall element is perpendicular to the cross section of the magnetic core and is used for acquiring a current signal of the double-wire cable and sending the current signal to the current sensing circuit; the energy acquiring coil is arranged on the surface of the magnetic core and is used for storing magnetic field energy of the double-wire cable; the current sensing circuit receives the current signal and is used for converting the current signal into a digital signal and wirelessly transmitting the digital signal in an electromagnetic wave. Through arrangement of the magnetic core outside the double-wire cable, distribution of an electromagnetic field around the double-wire cable is changed; the current of the double-wire cable is detected by the Hall element; the magnetic field energy of the double-wire cable is acquired by the energy acquiring coil and the current sensing circuit; therefore, the double-wire Hall current sensor achieves self power supply and wireless transmission.

The invention discloses a semi-active negative rigidity multidimensional vibration damping device. The semi-active negative rigidity multidimensional vibration damping device comprises an outer box body, wherein a tuned liquid damper, a negative rigidity mechanism and a magnetostrictive vibration generating unit are arranged inside the outer box body. The tuned liquid damper is a cylinder filled with damping liquid, the side surface of the cylinder is connected with a vibration absorption layer through a plurality of springs with one ends connected with rolling balls, the cylinder is arrangedon a plurality of metal balls, and the metal balls are arranged above a drum body. The negative rigidity mechanism is formed by the drum body and negative rigidity adjusting units radially arranged around the drum body; a giant magnetostrictive body is arranged at the bottom in the outer box body and connected with the drum body through a disc spring, and an induction coil and a permanent magnet are arranged around the giant magnetostrictive body from inside to outside to form the magnetostrictive vibration generating unit. An acceleration sensor is arranged at the bottom of the drum body andis connected with the magnetostrictive vibration generating unit, an electric energy storage and extraction unit, a controller and an excitation coil in series to form a closed loop.

The invention relates to a multi-energy integrated type self-powered breeding platform. An impact type turbine power generation device is fixed to the lower side of a floating body. An oscillating float type turbine power generation device is fixedly arranged on the lower side of the impact type turbine power generation device. An electric energy storage cabinet is connected with an oscillating float type turbine generator. A vertical-axis tidal current energy power generation device is fixedly arranged on the lower portion of the floating body. A windward wind power generation device is fixedly arranged on the upper side of the floating body. The electric energy storage cabinet is connected with an electric energy processing cabinet. The impact type turbine power generation device, the vertical-axis tidal current energy power generation device and the windward type wind power generation device are connected with the electric energy processing cabinet. A net cage group comprises a plurality of net cages fixed to the periphery of the floating body. A rope is led out from each net cage sleeve, and a temperature sensor, a water flow sensor, a dissolved oxygen sensor and an image-texttransmitting device are evenly distributed on each rope. The multi-energy integrated type self-powered breeding platform is high in function compounding degree and ingenious in design.

The invention relates to a self-powered marine three-dimensional online observation system which is composed of a buoy, a wind power generator, a solar panel, a satellite communication module, a wave-activated generator, an optoelectronic composite cable, an underwater observation instrument, an underwater float ball, a bottom-supported underwater platform, a uninterruptible power supply (UPS) andan ocean current generator. The system acquires environmental parameters in the seawater by utilizing the underwater observation instrument, and transmits the obtained seawater environmental parameters to shore-based station through the satellite communication module. The system obtains wind energy, solar energy, wave energy and ocean current energy from the environment by utilizing the wind power generator, the solar panel, the wave-activated generator and the ocean current generator and converts the energy into electric energy for use by the system itself, and self power supply and long-term continuous in-situ observation of the marine three-dimensional online observation system are achieved.

The invention comprises a sensor and a self-powered device, the both above are connected each other. The self-powered device comprises a piezoelectric layer, a magnetostriction layer and an amplification unit located between the piezoelectric layer and the magnetostriction layer. It features adding an amplification unit in the self-powered device.

The invention discloses a wireless sensor network (WSN) node self-powered system based on solar energy-wind energy complementation. The system mainly comprises a solar energy acquisition module, a piezoelectric type vertical axis wind energy acquisition module, a super-capacitor energy storage module and an interface circuit, wherein the solar energy acquisition module acquires luminous energy in the environment through a solar cell panel, the piezoelectric type vertical axis wind energy acquisition module acquires wind energy in the environment, the super-capacitor energy storage module stores the acquired energy into a super capacitor, and the interface circuit provides a channel for energy storage and WSN node power supply. In addition, in order to improve acquisition efficiency of the wind energy acquisition module and reduce influences of a wind direction, a vertical axis piezoelectric type scheme is adopted by the wind energy acquisition module. Due to the facts that rechargeable times of a lithium cell are limited, and in the process of acquisition of environmental energy, charging and discharging are frequent, the super capacitor in the system is used for replacing the lithium cell to serve as a system energy storage unit, and the service life of the energy storage unit can be prolonged. The WSN node self-powered system can collect energy in the environment, does not need to conduct maintenance on a cell, such as cell replacement and charging, therefore prolongs service life of a node, and solves the energy supply problem of a WSN.

The invention discloses a self-powered photoelectric detection structure based on graphene-gallium oxide phase junction, a corresponding preparation method and a photoelectric detector. The structurecomprises a substrate, gallium oxide phase junction nano columns formed on the substrate and a graphene film formed on the gallium oxide phase junction nano columns. The method comprises the steps ofgenerating gallium oxide phase junction nano columns on the substrate through hydrothermal, annealing and high temperature annealing, and transferring and forming a graphene film on the gallium oxidephase junction nano columns. The structure has the advantages of simple preparation process, low cost, easy mass production and the like. The photoelectric detector has the characteristics of self-power supply and good spectral selectivity, and has the properties such as high responsiveness and high sensitivity to sunblind ultraviolet light.

The invention discloses a piezoelectric energy harvesting device and method for automatically adjusting resonant frequency and bandwidth, characterized in that the piezoelectric plate is arranged on the cantilever beam, A cantilever beam is mounted on a fixed base, The micro motor is mounted on the cantilever beam through a motor bracket, the shaft of the micro motor is connected with the screw rod and can drive the screw rod to rotate, the other end of the screw rod is also fixed on the cantilever beam through the screw rod bracket, the mass block is mounted on the screw rod through threads corresponding to the screw rod, and when the screw rod rotates, the mass block can move along the screw rod direction. Circuit system plate are connected with piezoelectric plate for vibration energy capture, and judging whether the environmental vibration frequency matches the natural frequency of the piezoelectric energy harvesting device from the output signal of the piezoelectric piece, By controlling the forward and backward rotation of the micro-motor, the position of the end mass of the cantilever beam can be adjusted, and the distance between the mass and the motor can be adjusted, so that the first-order resonant frequency point of the piezoelectric energy harvesting device and the band width of the first-order and second-order superposition can be adjusted automatically.

The invention discloses an ocean wave buoy based on a parallel piezoelectric type six-dimensional acceleration sensor. The ocean wave buoy comprises a buoy body, a sensor system and a control system,wherein the control system arranged in the buoy body integrates wave acceleration information, wind speed information, wind direction information and azimuth angle information which is sent by an electronic compass, separately processes the characteristics of waves at the position of the ocean wave buoy body and meteorological data to calculate the main wave direction, the wave height, the wave period, the actual wind direction and the actual wind speed, and sends the calculated main wave direction, the wave height, the wave period, the actual wind direction and the actual wind speed to a monitoring system on a user side through a communication module. By means of the ocean wave buoy, the technical problems that ocean waves are observed can be solved, and the limitations in the prior art can be overcome; the wave characteristics, such as the wave height, the wave period and the wave direction, of the ocean waves and the meteorological factors, such as the wind speed and the wind direction, can be observed.

A gallium arsenide-based thermoelectric and photoelectric sensor in a self-powered radio frequency receiving and transmitting assembly is an array structure composed of several identical sensor modules. Each sensor module is formed by series connection of many groups of thermocouples. The hot end of the sensor is placed on the part (a cooling plate), where heat is concentrated, of a power amplifier, and the cold end of the sensor is far away from the part, where the heat is concentrated, of the power amplifier and is next to a metal shell (a heat sink plate), so that a large temperature difference is formed between the cold end and the hot end. A direct-current voltage is generated on the thermopile array structure based on the Seebeck effect and is output, and the direct-current voltage charges a rechargeable battery for energy storage; a layer of photovoltaic materialon the upper surface of the heat sink plate can be used for effectively absorbing optical energy, and then a photoelectric microsensor capable of collecting the optical energy is formed. The gallium arsenide-based thermoelectric and photoelectric sensor can collect the optical energy and thermal energy simultaneously for self power supply; compared with a traditional self-powered sensor which can only collect a single type of energy, the gallium arsenide-based thermoelectric and photoelectric sensor is smaller in size, and the power supply ability is greatly improved.

The invention discloses a display capable of carrying out transparent and nontransparent conversion, comprising an array substrate and further comprising a light-dimming thin film, wherein a buffering layer, a polycrystalline silicon layer, a grid electrode, a second insulating layer, a drain source layer, a third insulating layer, an anode, a pixel limiting layer, an organic light-emitting layer, a cathode and a package are arranged on one side face of the array substrate; the light-dimming thin film is arranged on the other side face of the array substrate; and the light-dimming thin film is controlled through a voltage adjusting module, so that the display can carry out the transparent and nontransparent conversion and requirements of a customer are met.

The invention discloses a Buck-boost LED driving circuit. An applicable lighting circuit comprises an inductor L1, an LED, a capacitor and a fly-wheel diode D1. The driving circuit includes high-voltage MOSFET and JFET tubes, a voltage producing module for producing voltage required for the work of modules in a producing system, a drive control module, a logic control module, a sampling resistor RS, a CS sampling calculation module for calculating equivalent current of the LED in a lighting circuit, an internal compensation module, a sawtooth voltage generator for modulating COMP voltage produced by the internal compensation module and a zero-crossing detection module for detecting wave troughs of an inductor in a resonant mode after demagnetization is completed, wherein the logic controlmodule can opens the high-voltage MOSFET tube when the zero-crossing detection module detects a wave trough signal. The power consumption is reduced, harmonic waves are low, and PFC is improved.

The invention discloses a synchronous rectification driving circuit suitable for central tapped structure rectifying circuit, comprising a high frequency transformer T1, a current transformer CT1, an output capacitor C1, an output capacitor C1, a synchronous rectifying tube SR1, a synchronous rectifying tube SR2 and a driving circuit for driving the synchronous rectifying tube SR1 and the synchronous rectifying tube SR2, wherein the current transformer CT1 has two primary side windings N1, N2 and one secondary side winding N3, which can drive two synchronous rectifying tubes. The favourable effects of the invention are as follows: 1, it only needs one currant transformer and one secondary side winding to realize the driving of two SRs so as to simplify the circuit and reduce the cost; and thus it is good for the high frequency and integrated development; 2, it is able to realize supplying power by itself of the driving circuit; the driving is simple; 3, it reduces the driving power consumption of the synchronous rectification, improves the light loading efficiency, reduces the loss and lowers the cost.

Provided is a self-power distributed wireless current sensor, comprising pincerlike housings; the pincerlike opening of one pincerlike housing is provided with a Hall element; a magnetic core is arranged in the pincerlike housings and is winded by an energy extraction coil. A control box is arranged under the pincerlike housings, and is internally provided with a power supply management circuit, a signal conditioning circuit, an A / D conversion module, an MCU processor module, and a wireless transmit-receive module. The energy extraction coil is in connection with the power management circuit which is in connection with the signal conditioning circuit; the signal conditioning circuit is in connection with the A / D conversion module; the A / D conversion module is in connection with the MCU processor module; the MCU processor module is in connection with the wireless transmit-receive module. The wireless transmit-receive module can be in wireless communication with a telecommunication device. The self-power distributed wireless current sensor overcomes the deficiencies of additional space occupation and independent power supply of a present current sensor, realizes self power supply, wireless transmission, multiphase circuit current measurement, etc., and can perform many-to-one data transmission.

The invention discloses a regional power grid T line fault range-finding system based on generalized measurement, and the system employs distributed sampling terminals, a communication network, and a traveling wave range-finding analysis center. The distributed sampling terminals comprise non-contact voltage and current traveling wave collection devices disposed at poles, and each non-contact voltage and current traveling wave collection device collects an abrupt signal of a traveling wave, and uploads the abrupt signal to the traveling wave range-finding analysis center of a main station through a communication network. The traveling wave range-finding analysis center calculates the position of a fault point through employing the information uploaded by the sampling terminals, taking the time marks of two ends of a fault branch circuit as the references, combining the parameters of the fault branch circuit and employing a double-end traveling wave fault range-finding theory, thereby achieving the fault range finding of the T circuit of a power grid. The system avoids the impact on a transition resistor, is better in range-finding precision, and plays an important role in improving the power supply reliability of a regional power grid.

The invention discloses a self-adaption intelligent system for monitoring abnormal conditions of turning tool and a method thereof; thermoelectric current is generated through a temperature difference between a blade participation cutting area and the bottom of a tool body in the cutting process; electricity is supplied to other vibration testing devices by dint of the current acquisition and a voltage controller; and finally, vibration features in the cutting process are transferred to such electronic equipment as mobile phones, computers or PDA of a visible monitoring platform through WIFI signals to achieve the purpose of real-time monitoring of a turning tool working condition through wireless connection. The system and the method can realize self-power supply in the cutting process and automatic report of the tool working condition, that is, the self-adaption intelligent monitoring function is realized.

The invention provides a full-nanofiber electronic skin which comprises an upper nanofiber membrane, a middle nanofiber membrane and a lower nanofiber membrane which are a contact electrification layer, a middle electrode layer and a bottom supporting layer respectively. The contact electrification layer and the bottom supporting layer are both nanofiber membranes made of biodegradable materials.And the middle electrode layer is a nanofiber membrane with a sterilization function and is electrically connected with the ground or other conductors. The electronic skin is provided with a pluralityof layers of staggered nanofiber networks and a large number of three-dimensional micro-nano hierarchical pores, so that the electronic skin has air permeability, high output, high pressure sensitivity and antibacterial property.