324 results about "Self-energy" patented technology

The invention relates to a self-adapting positioning method for mobile nodes of a hybrid sensor network. The system mainly comprises a plurality of common static nodes, mobile nodes, convergent nodes and a background monitoring center, wherein the common static nodes and the mobile nodes are communicated by the ZigBee mesh network protocol. The positioning process for the mobile nodes are mainly divided into the following three stages including node deployment, calibration and real-time positioning; and the method is characterized by making on-line correction of the attenuation model of wireless signal prorogation in a spot monitoring environment by utilizing a method that the mobile nodes self deploy or artificially deploy new nodes, eliminating the positioning error caused by the conditions of node self energy, data loss, small measured RSSI (Received Signal Strength Indication) value and the like, and simultaneously eliminating the participation of lineal children nodes into the positioning calculation of the mobile nodes on a great attenuation communication link caused by barriers and the like, thereby improving the self adapting positioning ability and the positioning accuracy of the mobile nodes of the hybrid sensor network, and the new nodes deployed can improve the robustness and the reliability of the entire network.

The invention provides a net load interaction multi-dimensional operation system based on smart power grids. The net load interaction multi-dimensional operation system based on the smart power grids comprises a scheduling master station, a user substation, a communication net mobile terminal and a public network on-line device. The scheduling master station is used for formulating a scheduling policy through energy efficiency analysis and simulation modeling, obtained scheduling policy information is sent to the user substation which is installed on a user side through a transport layer. The user substation carries out self energy management, receives and processes the scheduling policy and then sends the scheduling policy to the communication net mobile terminal. Due to the fact that the communication net mobile terminal controls the user substation, an energy optimizing strategy and inquiry and management of a load power utilization condition and an operation state are achieved. The public network on-line device is used for supplying data and policy information to the scheduling master station through the transport layer and supplying electricity consumption information and service to public network users. The system arranges various terminal devices arranged in a scheduling data network, an information inner network, a public network, a communication network and an electric grid in different networks, interconnection and collaborative operation are carried out on the system to achieve intelligent demand response and construction of a demand side optimizing operation system.

The invention relates to a network load balancing method based on energy information of a wireless sensor, comprising the following steps: (1) Sink broadcasts an energy report message; (2) nodes receive an energy report of the Sink and then update and maintain local load forwarding tables; (3) the load allocation proportion born by various forwarding nodes and the load born by the various nodes are calculated; (4) the message is forwarded when local nodes are far away from convergent nodes compared with the forwarding nodes or are brother nodes of the same layer with the forwarding nodes; (5) various field values in the message are modified by self energy information and the message is forwarded to all the lower-level neighboring nodes or all the brother nodes of the same layer except the forwarding nodes; (6) when all the nodes receive the energy report message, the message forwarding is stopped; (7) after the energy report message is forwarded within a single period, propagation paths which reversely use the energy report message establish a load convergent route from sensing nodes to the convergent node Sink hop by hop; and (8) the convergent node Sink periodically sends out the energy report message and completes allocation and convergence of sensing data. The method solves the problems of network load balancing and network life cycle of a large-scale wireless sensor.

The invention discloses a self-energy feeding type brake device for airplanes, belonging to the technical field of an airplane brake system, comprising a hydraulic pump, an auxiliary motor, a reducer, an electromagnetic clutch, a one-way valve, a high pressure oil filter, an energy accumulator, a brake valve, a by-pass valve, an overflow valve and an oil tank, wherein an input shaft of the hydraulic pump is connected with wheel shafts of airplane wheels via the electromagnetic clutch and the reducer; the electromagnetic clutch and the reducer are connected with the auxiliary motor; an oil suction port of the hydraulic pump is connected with the oil tank; an oil outlet of the hydraulic pump is sequentially connected with the one-way valve and the high pressure oil filter; then the oil passage is divided into three parallel branch oil passages; the first branch oil passage is sequentially connected with the energy accumulator and the overflow valve; the second branch oil passage is connected with the by-pass valve; the third branch oil passage is connected with a brake pressure servo valve; the three branch oil passages are gathered to enter into the oil tank; and the brake valve isconnected with a brake actuator via the oil passage. The brake device adopts an integral structure design and electrical interfaces, and directly converts the energy after the airplane lands into theenergy needed by the brake device for anti-skidding braking.

The invention provides a magneto-rheological vibration damper without an externally-connected power supply, comprising an earring, a supporting disc, a piezoelectric pile structure, a lower gland, a bottom end cover, an air bag, a cylinder body, a piston with winded coils, a piston rod, an upper end cover, a spring, an upper gland, a locking member, and an electric energy conditioning module. Wherein, one end of the spring is connected with a piezoelectric generating device, the other end is connected with the piston rod, when the piston rod moves up and down along the cylinder body under outside vibration, external force is applied to the piezoelectric generating device via pressing of a spring mechanism. Under the effect of pressure, the piezoelectric generating device generates electric energy, and the electric energy conditioning module converts high voltage AC electric energy generated by the piezoelectric generating device to low voltage DC electric energy, and applies the low voltage DC electric energy to the piston coils to generate an excitation magnetic field, make magneto-rheological fluid solidified, and improve damping force, thereby reducing vibration of the piston rod. compared with a conventional magneto-rheological damper structure, the magneto-rheological vibration damper without an externally-connected power supply can capture outside vibration energy to supply power to itself, forming a self-energy-providing magneto-rheological vibration damper system.

The invention discloses a single crystal furnace guide shell by adopting carbon or carbon composite material and a production technique thereof, which is characterized in that the guide shell comprises a high-density carbon or carbon composite material exterior layer(3) and a low-density carbon or carbon composite material interior layer (2). The production technique is that the carbon fiber is processed by blank making, densification, purification and machining. The invention has reasonable technique. As the exterior layer (3) of the guide shell is the high-density (1.2g / cm<3> to 1.7g / cm<3>) carbon or carbon composite material with flexural strength of about 110 MPa and the thermal conductivity of only about 10W / mK while the interior layer (2) is the low-density (0.4g / cm<3> to 0.9g / cm<3>) carbon or carbon composite material with thermal conductivity of only about 0.8W / mK. Therefore, the guide shell has good comprehensive properties, which not only has enough strength and wear resistance but also has good thermal shock resistance and insulation performance. At the same time, compared with a graphite guide shell, the wall thickness of the guide shell is reduced, the weight of the guide shell is reduced and the self energy consumption is also lowered.

The invention discloses a double acting self energy thermal expansion type high pressure sulfur hexafluoride breaker arc extinguish chamber, comprising a breaker shell and a static contact mechanism, a moving contact mechanism, a cylinder and an operating mechanism which are fixed in the breaker shell in a sealing way, wherein the operating mechanism drives the moving contact mechanism to move; the static contact mechanism comprises a static main contact and a static arc contact, the moving contact mechanism comprises an arc extinguishing port, a moving main contact and a moving arc contact; the static contact mechanism also comprises a rotating shifting fork driving the static arc contact to move up and down and a guide rail for the static arc contact to move up and down; the moving contact mechanism also comprises a push-and-pull rod which is arranged above the arc extinguishing port and can move up and down along with the moving contact mechanism to correspondingly drive the shifting fork to rotate. The invention has novel and reasonable structure design, all components are compactly connected, and use operation is convenient and use effect is good, thus the actual problems that stroke of the moving contact is large and the required operation power is also high during opening and closing operations in use of the existing self energy type breaker arc extinguish chamber can be effectively solved.

The invention discloses a self energy supply lightning current detection system, which is used for being matched with a lightning rod device for use to realize the defection on relevant parameters of lightning current. The self energy supply lightning current detection system comprises a signal sampling maintaining device, an energy taking device, a single chip control unit, a hardware clock unit and a data storage unit, wherein the signal sampling maintaining device comprises a current sensing unit, a first voltage limiting protection unit and a positive / negative peak value maintaining unit which are connected in sequence, and the energy taking device comprises an energy taking coil, a front end protector, a rectifying and wave-filtering unit, a second voltage limiting protection unit, a voltage stabilizing unit and a DC / DC unit which are connected in sequence. The self energy supply lightning current detection system of the invention can continuously realize the monitoring on whether a transmission line or a building lightning rod suffers with the lightning strike or not, and can accurately record the time, the amplitude value in the occurrence of the lightning strike and the polarity, a special triggering circuit is not needed, and the invention has the characteristics of high precision, simple structure, small size, low cost, high safety and the like.

The invention provides an oil extraction method for a heavy oil reservoir, which comprises the following steps: gel system profile control: configuring the composition of a front section plug formula to be 0.25%+0.05% of polymer (focusing ratio), configuring the composition of a main section plug formula to be 0.2%+0.05% of polymer (focusing ratio), firstly filling into a front section plug of a gel system, and then filling into a main section plug of the gel system; profile control: configuring 0.4% of oil displacement agent for a front section plug, configuring 0.25% of oil displacement agent for the main section plug, firstly filling into a front section plug of the oil displacement agent, and then filling into a main section plug of the oil displacement agent; water injection; and conversion. The oil extraction method for the heavy oil reservoir, which is disclosed by the invention, has the advantages of simple construction technology, high control and blocking success rate, big dewatering and oil increase amplitude and low measure cost. A construction scheme is flexibly made by aiming at the variation of the injection and extraction relationship, the plugging success rate is improved, residual oil is displaced by the self energy of edge water, the spreading volume is expanded, and scavenging area and oil field recovery ratio are improved.

The invention provides an on-line fault location device for a high-voltage power cable. The on-line fault location device comprises a first terminal and a second terminal which are respectively arranged at two ends of the high-voltage power cable and are in fiber connection with each other, as well as a data processing unit, wherein the first terminal is used for receiving fault generated traveling waves generated by a fault point and simultaneously sending a pulse signal to the second terminal; the second terminal is used for receiving the fault generated traveling waves generated by the fault point, as well as the pulse signal, and recording the time difference value between the fault generated traveling waves and the pulse signal; and the data processing unit is used for calculating the position of the fault point in the high-voltage power cable according to the time difference value. By adopting the technology provided by the invention, the high-voltage power cable can be monitored in a real time manner, and when the major insulation of the cable fails to work, reliable triggering of two-end timing equipment is realized by virtue of pulse waves which are generated at the fault point by the self energy of a power system, and analysis and calculation are carried out according to the timing data so as to acquire the position of the fault point in the high-voltage power cable, so that on-line monitoring and accurate location are achieved, the fault location efficiency is high and the fault location cost is low.

The invention relates to the sensor technology field and especially relates to a flexible self-energy-supply pressure sensor. The sensor comprises a dielectric frictional layer and a hydrogel dielectric layer which are attached with each other. Outer sides of the dielectric frictional layer and the hydrogel dielectric layer are successively provided with an electrode layer and a protection layer.The hydrogel dielectric layer is a mixture of a high-molecular polymer and a conductive liquid. The dielectric frictional layer is made of a friction dielectric polymer material. A convex microstructure is arranged on a contact surface of the dielectric frictional layer and the hydrogel dielectric layer. The flexible pressure sensor can be used to measure pressure on the structure. Compared with atraditional piezoresistive sensor, a piezoelectric sensor and a capacitive sensor, by using the pressure sensor of the invention, an idea of providing power by external pressure on the sensor itselfmakes the obtained sensor have advantages of flexibility, low power consumption, and high sensitivity and the advantage that there is no need to add power during measuring. Flexible pressure providedin the invention has a great potential application value on aspects of a wearable sensor and structural surface pressure measurement.

The invention discloses an electromagnetism and hydraulic pressure compound brake with the self power generation function and a working method. A hydraulic oil circuit is arranged in a braking support, and is connected with a left wheel cylinder piston and a right wheel cylinder piston, two compound brake disks are arranged between the left wheel cylinder piston and the right wheel cylinder piston, an electromagnetic coil is arranged between the two compound brake disks, and faces the electromagnetic braking surfaces of the compound brake disks, copper claddings are arranged on the electromagnetic braking surfaces respectively, each copper cladding is parallel to the cross section of the electromagnetic coil, an electromagnetic gap is reserved between each copper cladding and the cross section of the electromagnetic coil, the size of each electromagnetic gap ranges from 1mm to 2mm, a rotary shaft is fixedly connected with the centers of the compound brake disks, the rotary shaft, an automobile tire and a transmission shaft are connected together, permanent magnets are fixedly embedded into the rotary shaft, the magnetic poles of the permanent magnets are arranged in a staggered mode, a power generation stator coil is arranged outside the permanent magnets, the size of a gap formed between the power generation stator coil and each permanent magnet ranges from 1mm to 2mm, the rotary shaft and the compound brake disks rotate synchronously, the permanent magnets carry out power generation by cutting the magnetic field of the power generation stator coil, generated electric currents serve as field currents of the electromagnetic coil after being processed through rectification and voltage stabilization, and self energy supply is achieved.

The invention provides a solar energy and wind energy multi-energy complementary micro self-energy supply device based on an MTEG and a TENG. The MTEG structure on the top and the TENG structure at the bottom are coupled. The micro self-energy supply device is characterized in that the MTEG structure on the top comprises a micro thermoelectric power generation device and a phase change heat storage device arranged at the upper part of the micro thermoelectric power generation device, and a top vacuum cavity and a bottom vacuum cavity are arranged at two ends of a thermocouple composed of a P-type micro thermoelectric arm and an N-type micro thermoelectric arm respectively; the thin film flapper type TENG structure at the bottom is of a transversely arranged hollow columnar structure, a flapper thin film is connected with a middle thin copper sheet so that the thin film flapper type TENG structure serves as a dielectric thin film of a frictional nanometer power generation structure to generate voltage, and the other end of the middle thin copper sheet is fixedly connected with a conducting vertical frame as a circuit load fixed between metal electrodes. The vacuum cavity can effectively avoid heat loss caused by ambient air and the upper part of a substrate, and the temperature difference between nodes at cold and hot ends is improved; and simultaneously, the flapper thin film is accelerated to swing through flowing air to improve the power generation efficiency, so that the device is simple in structure and high in practicability.

The invention provides a self-energy feedback type brake apparatus-based airplane braking system and a control method of the self-energy feedback type brake apparatus-based airplane braking system. The method comprises the following steps: an airborne power source provides electric energy to each self-energy feedback type brake apparatus; an airplane braking system controller controls each self-energy feedback type brake apparatus and braking actuators which are connected with the corresponding self-energy feedback type brake apparatuses to provide braking power when receiving an airplane braking instruction. The system and the control method have the advantages that the braking system has an integrated structure, and the amount of parts can be reduced due to the high integration of the modules, thus the braking system is extremely high in reliability and maintainability; the braking system is independent of host computer energy sources, and the braking can be completed even when the host computer is under the normal state or the power-free emergency state; the braking system is encapsulated into an electro-hydraulic integrated device interface, a hydraulic pipeline of a pump resource in a resource self-cluster is cancelled, and the weight of the airplane is reduced, so that the safety of the airplane can be improved.

The invention provides an on-line arrester monitoring device with a self-energy-taking function. The device comprises a CPLD (complex programmable logic device), a power supply unit, and a lighting stroke number acquisition unit of the arrester, wherein the output terminal of the CPLD is connected with a remote computer through optical fiber, the power supply unit is connected to two ends of the arrester through a rectifier and stores energy to both a second capacitor and a third capacitor through the arrester, and the stored energy are subjected to DC / DC conversion and used for supplying electricity. The monitoring device utilizes the characteristics of the arrester, utilizes the concepts of capacitor energy storage and low-voltage transformation to realize the self-energy-supply of a communication chip and solves the problem of difficult energy supply to an online monitoring interface module of the arrester.

The invention relates to a high-speed cylindrical roller bearing and an integrated monitoring device of the high-speed cylindrical roller bearing and belongs to the technical field of bearings and monitoring technologies of the bearings. A movable disc and a fixed disc are installed on an inner ring and an outer ring of the bearing respectively. A cantilever beam type piezoelectric vibrator is connected between the inner ring and the movable disc in a pressing mode, and a cantilever beam type piezoelectric vibrator is connected between the outer ring and the fixed disc in a pressing mode. Excited magnets are installed at the free ends of the piezoelectric vibrators. The movable disc and the fixed disc are respectively provided with a circuit board and different types of sensors. An excitation disc and holders are installed in a riveted mode. Limiting balls are arranged between the excitation disc and the inner surface of the outer ring. An excitation magnet is installed on the excitation disc. The integrated monitoring device has the advantages that the monitoring device and the bearing are integrated, and the integrated monitoring device has a self-energy-supplying sensing monitoring function and can be used as an independent component without changing the equipment structure; the piezoelectric vibrators are excited based on a differential motion principle, and kinetic energy and generating capacity obtained by the piezoelectric vibrators can be effectively increased at the time of high speed; the structure size of the piezoelectric vibrators and the arrangement of the excitation magnet are reasonable, piezoelectric plates only bear pressure stress without twisting, and reliability is high.

The invention provides an energy pack. The energy pack comprises a positive electrode and a negative electrode separated by electrolyte, and also comprises a piezoelectric ion transmission layer positioned between the positive electrode and the negative electrode, wherein the piezoelectric ion transmission layer generates a piezoelectric field pointing from the positive electrode to the negative electrode under the action of mechanical force. According to the energy pack, a piezoelectric ion transmission layer material is introduced between the positive electrode and the negative electrode to replace inherent units of device construction of a cell or a super-capacitor. Therefore, the energy storage characteristics of the existing electrochemical system is nondestructively kept, and ions in the electrolyte are driven to migrate by piezoelectric potential generated by the piezoelectric material under the mechanical action, thereby causing nonuniform redistribution of ion concentration to trigger the charging process. Accordingly, the energy pack provided by the invention has a function of self energy charging.

The invention discloses a device for detecting energy consumption and faults of a Zigbee wireless sensor network node, and is used for solving the technical problems that the wireless sensor network node is not beneficial to saving the energy of a whole network and prolonging the service life of the whole network because the wireless sensor network node can not detect self energy consumption and faults. The device mainly comprises a sensor socket, a signal amplification module, a working state indication module, a high-frequency transmission module, an energy consumption and fault detection module, a cell / power supply module and a serial port output module. The detection on the energy consumption and faults of the wireless sensor network node is realized by the energy consumption and fault detection module consisting of an MSP430 singlechip through control connection of the sensor socket and the sensor network node. The device for detecting the energy consumption and faults of the Zigbee wireless sensor network node, disclosed by the invention, has the characteristics and the beneficial effects of: simultaneously detecting node energy consumption and node fault information while the wireless sensor network node detects illumination intensity or humidity and temperature and networks based on a Zigbee technology, avoiding energy waste caused by sending information to faulty nodes, and prolonging the service life of the whole network. The wireless sensor network node is additionally provided with a light emitting diode, thus the working state of the sensor node is indicated by lightening or extinguishing the light emitting diode.

The present invention discloses a method for replacing partial required cluster-head of cluster-based routing of wireless sensor network. Through the method, the cluster-head replacing in the cluster-based hierarchy-type routing in the wireless sensor network can be realized. Furthermore the problems such as energy consumption of normal whole network cluster changing are reduced through the partial required cluster-head replacing. The technical scheme adopted by the invention is that the data package transmission of cluster-head is monitored all the time by the non-cluster-head node in the cluster thereby estimating the residual energy of the cluster head. An cluster application is initialized according to the magnitude relationship between the estimated cluster-head residual energy and the self energy of non-cluster-head node thereby realizing partial required cluster-head replacing. The cluster-head replacement according to the invention uses cluster as a unit. The conditions whether each cluster should replace the cluster, when to change the cluster and which new node is selected for the cluster head are all independent from each other, thereby reducing the energy consumption when the whole network is changed with cluster timely, and obtaining an energy equalization of the whole network.

The invention provides a novel self-energy type liquid metal current limiter and a current limiting method. The novel self-energy type liquid metal current limiter is characterized in that liquid metal carries out self-constriction arcing under the fault current condition and is gasified under the effect of electric arcs, generated powerful metal steam is continuously accumulated and finally pushes a movable insulation draw plate arranged between insulation baffles to upwards slide, the electric arcs between the insulation baffles and the draw plate are rapidly extruded into a slit and are further lengthened, then the voltage of the electric arcs is rapidly increased, and the fault current is further limited. The novel self-energy type liquid metal current limiter is simple in structure and particularly suitable for limiting the fault current of alternating-direct current systems in the medium-low voltage field, and burdens of various electrical devices such as breakers can be assisted to be relieved.

The invention relates to a high-voltage circuit breaker with a blocking ring contact and a vortex generator and belongs to the field of high-voltage electrical technology. The high-voltage circuit breaker comprises a static arc contact, a main spraying nozzle, an auxiliary spraying nozzle, a dynamic arc contact, a blocking ring, the vortex generator and a piston, wherein the main spraying nozzle, the auxiliary spraying nozzle, the dynamic arc contact and the vortex generator are respectively and fixedly connected with the piston to form an arc extinguishing chamber moving part which rightly faces to the static arc contact. The breaking of the arc extinguishing chamber moving part is achieved by means of the driving of a circuit breaker mechanism. A heating channel is formed between the main spraying nozzle and the auxiliary spraying nozzle. According to the high-voltage circuit breaker, the blocking ring contact is used for strengthening air blocking effect between the static arc contact and the main spraying nozzle during arcing, the vortex generator is used for generating swirling airflow to improve mixed effect of the airflow in an expansion chamber, and accordingly, breaking capability of the self-energy circuit breaker is improved.

The invention relates to an oil-field largest swept volume chemical-flooding oil production method, which is applied to the technical field of oil production in oil fields. The method is applicable to all reservoirs which can be exploited by water flooding but are not exploited by water flooding. When oil is exploited, the self energy of the strata of a reservoir is first utilized to carry out flowing production or swabbing production; when an oil field adopting flowing production or swabbing production reaches the economic benefit limit of production, flowing production or swabbing production is ended, subsequent water-flooding production is not carried out any more, but chemical flooding injecting surfactant as main agent is directly adopted to intensify oil production. The method has the following advantages that: at the moment, the swept volume of the displacement of the chemical displacing fluid is the largest, which is best favorable for the exertion of the oil-washing effect ofthe surfactant, and thereby the yield of oil production can be increased to the max.

The invention discloses a self energy taking device of a high voltage direct current circuit breaker and an implementing method thereof. The self energy taking is composed of a circuit energy taking unit, a high frequency inverter circuit, a high frequency transformer, a magnet ring transformer and a rectifying and voltage-stabilizing circuit connected successively; the implementing method of the self energy taking device includes the steps of: when the circuit energy taking unit is connected into the main branch of the high voltage direct current circuit breaker in series, obtaining energy from the current of the main branch; when current flows through the main branch, controlling the switching-on and switching-off of a switch tube; regulating the charging time of a capacitor to control the voltage range of the capacitor. The self energy taking device provided by the invention utilizes the energy in the circuit without using an additional independent power supply, is applicable to the mechanical switch and power electronic device mixed type direct current circuit breaker, and is lower in insulating requirement of the high frequency transformer with respect to a scheme of supplying power from low potential through the high frequency transformer when being applied to a current limiting device composed of a plurality of direct current circuit breaker connected in series.

The invention discloses a self energy resource controlled parking equipment,which comprises the following parts: decision rapid roof, support arm and brake beam, wherein the decision rapid roof is installed at the entrance end of parking car in front of the parking equipment; the spiro is at the outside of circuit stock rail; the support arm uses the inside and outside rail anchor to fix on the stock rail bottom and uses the bolt to fix; the brake beam snail is fixed on the support bolster; the hydraulic press is a closed hydraulic system which is integrated with hydraulic cylinder, plunger piston, reversing solenoid valve, one-way valve, accumulator, which can saves the generator, air pump, lubricant pump,accumulator,power cable,conduit line,adaptor and other external devices; when the parking equipment installs at the bottom of the classification track is use for as parking equipment, the normal condition is application position; the order is controlled by controlling building; the proof slide vehicle is carried out the automatic stopping which installs target section behind the goal application position exit; when parking equipment is used for goal brake, the normal condition is for alleviation position to carry out braking speed governing. The invention simplifies the structure, which uses widely.

A method and system for control a self-energy storage multi-end flexible system are disclosed, the system controller is designed by backstepping method, which realizes the stabilization of DC voltageand the fast independent control of active and reactive power. At the same time, the constrained instruction filter is introduced to solve the problems of differential expansion and control saturationof backstepping control, and the compensation signal is designed to solve the error problem of the filter, Adaptive control is introduced to guarantee the robustness of the system to uncertain parameters, and the projection operator is used to optimize the adaptive uncertain parameters. The control law of the system is designed based on Lyapunov stability theory, which improves the anti-disturbance ability of the system and realizes the asymptotic stability of the whole system. At last, that simulation model is construct in the simulation software, and compared with the traditional PID control algorithm and the instruction filter back-calculation algorithm, the simulation result shows that the control method of the invention has bet robustness and dynamic response performance, and provides theoretical basis and technical support for the control algorithm of the self-energy storage multi-end flexible straight system.

The invention discloses a fishing tool for a natural gas extraction downhole throttle device and an operation method of the fishing tool. The fishing tool for the natural gas extraction downhole throttle device is designed in order to achieve the purposes of enabling the throttle device to finish fishing operations by means of self energy, lowering operation risks and improving fishing success rate. The fishing tool for the natural gas extraction downhole throttle device mainly comprises a connecting pipe, a joint, a spring, a locking sleeve, a flat spring, a slip and the like, wherein the connecting pipe connects a projector, a connector and a mandrel, the joint is arranged below the connecting pipe, the spring and the locking sleeve are arranged inside the joint, and the flat spring and the slip are arranged on the locking sleeve. Through the working procedure operations of release of the throttle device, throwing of the fishing tool, installation of a well mouth device, well opening production and finish of fishing, the fishing tool enables the slip to keep a withdrawn state, pushes the throttle device to move upwards by means of energy of a gas well, and bears upward pushing force far larger than pulling force of a steel wire, thereby largely reducing the operation risks and substantially improving the fishing success rate of the throttle device.

The invention discloses a small cell base station self-energy-supply self-back-transmission method based on the technologies of full duplex and large-scale antennas, and belongs to the technical field of wireless communication. The method comprises the specific steps: firstly building a system model of a user, a macro base station and small cell base stations; secondly enabling the macro base station and all small cell base stations to respectively measure the state information of each link channel in a certain period and to record the energy arrival rate value and the remaining energy value of a battery, and calculating each an advanced wave beam forming vector; thirdly carrying out the modeling of the link rates of the access of any user to the macro base station and the n-th small cell base station; fourthly carrying out the modeling of the back transmission link rate between the small cell base station and the macro base station; fifthly calculating the sum of the spectrum frequencies of all users access to a network; finally taking the spectrum frequencies as an optimization target, and building an optimization problem combining the user access selection and the power distribution. The method greatly reduces the network cost, improves the deployment flexibility of the small cell base stations, and enables the deployment of the small cell base stations not to be affected by landform and the energy supply level.

The invention discloses a wind bell type friction nano-generator and a manufacturing method thereof, which belong to the technical field of self-energy supply. The wind bell type friction nano-generator includes a packaging chamber and a swing unit arranged in the packaging chamber. The packaging chamber is provided with an air vent thereon and an electrode therein. The electrode includes electrode layers oppositely arranged on the two inner surfaces of the packaging chamber. The swing unit includes a swing film and a friction film. One end of the swing film is connected with the top of the packaging chamber, and the other end is connected with the friction film to drive the friction film to swing. The friction film can contact the electrode layer during swing. The weak wind energy in theenvironment or the micro energy of human respiratory airflow can be fully converted into electrical signals and output, and the problem that the existing friction nano-generator is limited in usage scenario and cannot collect small wind energy is solved.

The invention discloses current transformer equipment with effects of energy self-supply and low consumption. The current transformer equipment comprises a sensing light source, a fast optical attenuator, a first optical fiber coupler, a second optical fiber coupler, an energy self-supply module, an optoelectrical feedback control circuit, a primary current sensor and an optical fiber jitter monitoring module, wherein the sensing light source is connected with the first optical fiber coupler, one output end of the first optical fiber coupler is connected with the energy self-supply module, the other output end of the first optical fiber coupler is connected with the fast optical attenuator, the electricity input end of the fast optical attenuator is connected with the optoelectrical feedback control circuit, the light output end of the fast optical attenuator is connected with the second optical fiber coupler, the output end of the second optical fiber coupler is connected with the optical fiber jitter monitoring module and the optoelectrical feedback control circuit, the optoelectrical feedback control circuit is connected with the primary current sensor, and the energy self-supply module is connected with the optoelectrical feedback control circuit. The current transformer equipment has the effects of energy self-supply and low consumption. The invention also provides a bus current detecting method which is high in measuring precision.