76 results about "Micropower" patented technology

The invention provides an HPLC (High Performance Liquid Chromatography) and micropower wireless dual-mode communication frequency self-adaption method, which belongs to the technical field of dual-mode communication and comprises the following steps: firstly, establishing dual-mode communication by initializing parameters such as carrier frequency, sending power and modulation mode; secondly, electromagnetic interference signals in a power line channel are collected, and a linear superposition noise model containing a time domain weight is established to predict noise characteristics; meanwhile, a zero-crossing point time sequence of the power line signal is analyzed, and a zero-crossing point feature vector is constructed. And in combination with noise spectrum prediction and zero crossing point features, solving a convex optimization problem to obtain an optimal carrier frequency and other communication parameters. For micropower wireless communication, a channel quality evaluation matrix is constructed based on indexes such as signal strength, channel busy degree and bit error rate, an interference prediction model is established, and wireless communication parameters are optimized through quadratic programming. And finally, establishing a switching decision function according to a set communication quality threshold, and realizing self-adaptive switching of dual-mode communication so as to ensure the overall communication quality.

The invention discloses a reliability evaluation method for a micro-grid power distribution system based on a Bayesian network and a sequential Monte Carlo method, and the method comprises the steps: building a micro power supply multi-state combination output model according to the operation state of a power distribution element; carrying out load partitioning on the load in the microgrid through a multi-target particle swarm optimization algorithm; calculating a load output time sequence problem, and enabling the micro-grid distributed power supply to be equivalent to a piecewise function; carrying out analogue simulation on the wind speed and the illumination intensity by adopting an improved ARIMA (Autoregressive Integrated Moving Average), and establishing a time sequence composite model; calculating the ratio of the weekly load to the annual maximum load, the ratio of the daily load to the weekly maximum load, and the ratio of the load per hour to the daily maximum load; establishing a logic relation graph of each node through a Bayesian network, and establishing a time sequence source-load change model; in combination with the time sequence composite model and a time sequence source-load change model, sampling each node of a system element, and judging an operation state; and performing simulation analysis on the reliability index of the power distribution system to obtain a final result. The method can be used for improving the power supply performance by improving the reliability of the fixed-point weak link.

The invention discloses a thermistor mounting method and related equipment. The thermistor mounting method comprises the following steps: applying micro-power alternating bias excitation to a thermistor to obtain cold-state thermal resistance reference data; mounting a thermistor on the surface of the solder paste, collecting real-time resistance data in a temperature rise process, and performing normalized difference according to cold-state thermal resistance reference data to obtain a normalized dynamic resistance curve; performing derivative continuity and extreme value distribution analysis on the curve to obtain a wetting connectivity index; when the wetting connectivity index reaches a preset threshold value, executing second-order extreme value spacing analysis to obtain interface heat flux density distribution, calculating an interface thermal resistance dispersion vector field, and adjusting the transmission chain speed and furnace chamber airflow parameters according to the interface thermal resistance dispersion vector field; and a backtracking dynamic resistance curve is obtained in the cooling process, and the backtracking dynamic resistance curve and the standardized dynamic resistance curve are differentiated to obtain a curing quality factor. According to the invention, real-time identification in a defect germination stage and instant correction in a solder solidification window stage in a thermistor mounting process can be realized, and the mounting quality and reliability are improved.

A constant micro power energy system (CMPES) device to harness sustainable energy sources and generate power including a main body structure having a base plate, a frame extending from the base plate, and a top plate positioned at the top of the frame. The CMPES device includes a flask barrel positioned in the frame and motors positioned on the top plate. The CMPES device includes a ring gear connecting the flask barrel and a motor shaft of the motor. The CMPES device includes disc generators positioned inside the flask barrel. The motors supply power to drive the flask barrel to rotate constantly at a predetermined speed in order to generate continuous and simultaneous Alternating Current (AC) and Direct Current (DC) electrical power output. The motors facilitate direct transmission to the disc generators in order to provide the electrical power output to panel systems connected to the CMPES device.

A micro-power wind-solar hybrid energy harvesting and power generating device including a solar power generation module, a wind power generation module, a control module, an energy storage module, and an accessory structure are provided. The solar power generation module is mainly composed of a solar thin film cell and a corresponding interface control circuit, and the wind power generation module includes a wind-induced vibration structure, a cantilever beam structure, a piezoelectric element, and a corresponding interface control circuit. The solar thin film cell is mounted at a top of the wind-induced vibration structure, and interface control circuits, the energy storage module, etc. are all arranged inside the wind-induced vibration structure. The control module is configured to handle an energy harvesting and power generating algorithm of the wind-solar hybrid power generating device to maximize the power generation quality and the power generation efficiency of the device.

The utility model provides a distribution line fault positioning device, which relates to the field of fault positioning and comprises a plurality of data acquisition units, a data collection module and an intelligent fusion terminal. The data collection module is in wireless communication connection with each data acquisition unit through micropower, and the data collection module is connected with the intelligent fusion terminal through a serial port; the data acquisition unit comprises a first data acquisition module, a second data acquisition module and a third data acquisition module; the first data acquisition module, the second data acquisition module and the third data acquisition module are all in wireless communication connection with the data collection module through micropower. According to the utility model, each data acquisition module can be self-powered and complete various detection functions, data of the data acquisition modules are gathered to the data collection module for unified collection and processing, large-area electric wire fault monitoring can be realized, and the electric wire monitoring efficiency is improved.

The invention discloses an intelligent cement-soil mixing pile machine, which relates to the technical field of building equipment and comprises a pile machine intelligent edge terminal, an intelligent slurrying station subsystem and a cloud platform management subsystem, the pile machine intelligent edge terminal is integrated on a cement-soil mixing pile machine; the intelligent slurrying station subsystem is located on a construction site; the cloud platform management subsystem is deployed in a remote server; data connection is established between the pile machine intelligent edge terminal and the intelligent pulping station subsystem through a first wireless communication network, and the first wireless communication network is a LoRa long-distance radio micropower wireless network; data connection is established between the pile machine intelligent edge terminal and the cloud platform management subsystem through a second wireless communication network. According to the invention, the crossing from a'fixed formula 'to a'dynamic formula' is realized, the quality uniformity and reliability of the pile body are ensured, the ineffective operation is reduced through optimal control, and the cost of materials such as cement and the like can be obviously saved.

The invention relates to the field of power grids, and discloses a power line topology identification method of a dual-mode communication integrated Bluetooth technology, which comprises the following steps: a communication main node CCO and a communication sub node STA are electrified and initialized, a high-speed power line carrier and micropower wireless hybrid communication network is automatically established, and a dual-mode communication link is established; the CCO collects power failure event information recorded by each STA through the link, screens out a power failure STA node set in the same time window based on a timestamp matching algorithm, and generates a preliminary electrical topological relation; each node Bluetooth module periodically broadcasts and records RSSI values, and after CCO summarizing, STA nodes are spatially grouped through a density clustering algorithm; the physical distance between the key node pairs is further obtained, and physical position grouping is optimized; and finally, the CCO fuses the electrical topology and the physical position information, and generates a complete power line topological graph by using a graph theory algorithm. According to the method, effective identification of the topological structure of the low-voltage distribution area is realized, and electrical and spatial dual-dimension information is provided.

The present invention discloses a multi-output crystalline silicon solar cell structure, comprising a plurality of structural units arranged side by side on a substrate. Each structural unit comprises a multi-layer power generation structure composed of a plurality of independent low-power power generation units stacked together. Adjacent low-power power generation units are insulated from each other by an insulating layer. The width of the multiple low-power power generation units and the insulating layer gradually decreases from bottom to top, so that the cross-section of each structural unit is an isosceles trapezoid with a narrow top and a wide bottom. Each low-power power generation unit is provided with a set of output ports. A focusing baffle is provided between adjacent structural units. The focusing baffle is composed of a plano-convex lens area, a buffer area, and a support area, from top to bottom. The focusing baffle is embedded between adjacent structural units through the support area, and is used to focus incident light between the two adjacent structural units for multiple reflection. The battery is easy to use and can provide electricity for small and micro-power applications without cutting the battery chip.

The utility model relates to a micropower pickup circuit, which comprises a self-excitation booster circuit, a voltage stabilization booster circuit, an energy storage circuit, a discharge drive circuit and a single chip microcomputer chip, the self-excitation booster circuit is connected with an input voltage, and an output end of the self-excitation booster circuit is connected with an input end of the voltage stabilization booster circuit. The output end of the voltage stabilizing and boosting circuit is connected with the input end of the energy storage circuit, the output end of the energy storage circuit is connected with the input end of the discharging driving circuit, the single-chip microcomputer chip is connected with the output end of the discharging driving circuit, and the single-chip microcomputer chip is connected with the energy storage circuit and monitors the output voltage of the energy storage circuit. And if the output voltage of the energy storage circuit is greater than or equal to the preset voltage, the single-chip microcomputer chip acquires a signal value and performs signal transmission. According to the technical scheme, extremely-low-power pickup is effectively achieved, pickup and sending of multiple signals in the physical world can be achieved through self-adjustment of a single-chip microcomputer software system under the condition that human intervention is not needed, and therefore the application range of the Internet of Things world is widened.

The application belongs to the field of electric power, and particularly relates to a micro-power wireless communication system and method applied to a power distribution network. The system comprises a multi-mode radio frequency processor circuit, a radio frequency power amplification circuit, a radio frequency matching circuit, a power management circuit, a mode management module and an antenna end. The multi-mode radio frequency processor circuit, the radio frequency power amplification circuit and the radio frequency matching circuit are sequentially connected. The multi-mode radio frequency processor circuit is further connected with the power management circuit and the mode management module respectively. The other end of the radio frequency matching circuit is connected with the antenna end. The wireless sensing can be widely applied in the field of power grid under the condition of low power consumption.

The invention provides a single battery inversion boost control circuit, method and device, the control circuit comprises a single battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a driving unit and a micro-control unit, the single battery is connected with the high-frequency voltage modulation unit through a first circuit, the single battery is connected with the micro-power boost circuit through a second circuit, and the driving unit is connected with the micro-control unit. The driving unit and the micro-control unit are connected to the output end of the micro-power booster circuit, and the micro-power booster circuit supplies power to the driving unit after boosting the voltage of the single battery to a first preset voltage value and supplies power to the micro-control unit after reducing the voltage to a second preset voltage value. Flexible voltage conversion is achieved through the micropower booster circuit, extra excessive complex voltage adjusting equipment is not needed, the relatively low voltage of a single battery can be effectively boosted to the relatively high voltage meeting the load requirement, the working state can be dynamically adjusted according to the load change, efficient and stable voltage output is ensured, and the service life of the battery is prolonged. And the electric energy conversion efficiency is improved.

The invention belongs to the technical field of wireless communication modules, and discloses a protection device. The protection device comprises a shell, a damping assembly, a fastening assembly and a heat dissipation assembly are arranged in the shell, the damping assembly is used for buffering and protecting the module, the fastening assembly is used for pressing and fixing the module, and the heat dissipation assembly is used for reducing the temperature in the shell. Openings communicated with the cavity are formed in the two ends of the shell, the openings are used for placing the wireless communication module between the fastening assembly and the buffer assembly, sealing end plates used for sealing the openings are arranged at the openings, and the sealing end plates and the shell are detachably connected in a buckled mode in an inserting fit mode. The protection device can solve the problems that in an existing intelligent power grid, a micro-power wireless communication module is complex in installation and maintenance and prone to being affected by external impact and vibration, and can solve the problems that heat accumulation affects the performance of the module, even causes damage and threatens the overall operation efficiency and safety of a power grid system.

1. The name of the design product: micro power repeater. 2. The use of the design product: for network optimization and enhance mobile phone signal. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to the technical field of electronic devices, and discloses a micro-power module structure, a micro-power isolation power module and a power module, and the micro-power module structure comprises a transformer which is provided with a drum-shaped magnetic core, a conductive coil and a magnetic cover plate, the drum-shaped magnetic core comprises a wrapping post, a first mounting part and a second mounting part, wherein the first mounting part and the second mounting part are integrally formed and constructed at the two ends of the wrapping post. A plurality of pins are arranged on one side, deviating from the magnetic conductive cover plate, of the first mounting part, a plurality of pins are arranged on one side, deviating from the magnetic conductive cover plate, of the second mounting part, and one side, deviating from the magnetic conductive cover plate, of each pin is in a plane shape; and the carrier plate is provided with a plurality of bonding pads which are in one-to-one correspondence with the pins on the first mounting part and the second mounting part. According to the invention, the condition that the carrier plate around a welding spot cracks due to the adoption of spot welding in the prior art can be effectively avoided, the reject ratio of module products can be effectively reduced, and the miniaturization design of micro-power module products can be fully met.

The invention discloses a micropower-oriented high-efficiency dual-frequency omnidirectional circularly polarized radio frequency rectification antenna. The antenna comprises a receiving antenna unit and a dual-frequency rectification circuit unit which are connected with each other. The receiving antenna adopts a dual-frequency omnidirectional circular polarization design; the double-frequency rectification circuit comprises a diode branch and a load branch which are connected in parallel. The diode branch comprises a coupling microstrip line, a pilot frequency impedance conversion network and a dual-frequency harmonic suppression structure which are connected in sequence; the load branch is formed by connecting a straight-through filter with a load in series. The double-frequency harmonic suppression structure forms a band-stop characteristic at the secondary harmonic of the double working frequency points; the pilot frequency impedance conversion network realizes a double-frequency-point same-input impedance characteristic; the coupling microstrip line enhances the voltage amplitude of the diode so as to improve the rectification efficiency of the circuit under the condition of micro input power. The antenna has good omnidirectivity and circular polarization performance, and can collect dual-frequency, multi-direction and multi-polarization electromagnetic waves; and meanwhile, the rectifier has the advantages of high rectification efficiency, small size and compact structure under a micro-input power condition, and better meets the requirement of collecting weak radio frequency energy in an actual scene.

The invention discloses an unmanned aerial vehicle expelling method based on micro-power interference optimization in an urban environment, and the method achieves the precise recognition of an unmanned aerial vehicle target through a multi-mode detection means, completes the legality judgment through combining with a radio frequency fingerprint comparison white list, can effectively avoid the wrong expelling of an unmanned aerial vehicle which normally executes a task, and improves the accuracy of the unmanned aerial vehicle. Therefore, the problem of lack of distinguishing capability in the prior art is solved; meanwhile, an electromagnetic coexistence constraint set is dynamically generated before interference, public systems such as cellular communication, a wireless local area network and emergency communication are protected, null is formed in the direction of a base station, it is ensured that interference signals cannot be leaked out to affect urban public communication, and the defect that traditional high-power interference is prone to generating incidental damage to peripheral systems is overcome; in the expelling execution process, according to the method, frequency points, power, duration and beam parameters are determined through micro-power interference optimization, and targeted expelling of illegal unmanned aerial vehicles is achieved through directional emission of phased-array antennas and calling of a micro-power waveform library.

The utility model discloses a micropower DCDC converter, which comprises a transformer, the transformer comprises a magnetic core and two windings, the magnetic core is of a square ring structure and is integrally formed by ferrite materials, and four side columns are formed on the magnetic core; and the two windings are respectively wound on the two side columns of the magnetic core to form non-crossed and overlapped layout positioning of the two windings. Compared with the prior art, according to the scheme, the utilization rate of the window area of the magnetic core can be improved, the overall size of a high-isolation product can be reduced, the consistency of isolation voltage resistance, isolation capacitance and leakage inductance can be better, and the magnetic core is suitable for mechanical winding of a large-wire-diameter winding and particularly suitable for a micro-power product with the high isolation voltage resistance requirement.

The invention is applicable to the technical field of head-mounted Internet of Things intelligent mobile terminals, and provides an optimization method and a network system of a head-mounted battery pack, comprising a mobile power supply mounted on one (top) or multiple (top) cap bodies, and digital displays of a rechargeable battery, a power generation device, stored electric quantity, residual used electric quantity and the like on the mobile power supply of the cap bodies. The electric quantity relates to intelligent real-time matching of current, voltage and power related to a control switch, a rechargeable battery, power generation equipment, a microcomputer main control board, a wireless communicator, a display screen, an identity recognizer, a temperature detector, a human brain detection sheet sensor, a camera, a night vision device, an illuminator, earplugs, a pickup arm, other hardware equipment and the like; the invention discloses a six-phase battery pack optimized power supply system capable of automatically distributing and metering. According to the six-phase battery pack, micro-current, micro-voltage and micro-power of a human brain detection sheet serve as a minimum standard battery unit, and two or more battery units are combined and optimized in two modes of increasing voltage in series and increasing current in parallel to form a network system. Therefore, the electric power requirements of the head-mounted Internet of Things intelligent mobile terminal and other hardware equipment can be met. Through the optimized network system, a user can solve the power utilization problem of the head-mounted Internet of Things intelligent mobile terminal and master the power utilization condition at any time. A user can freely select the charging period according to the actual situation, the mode that an existing MR head-mounted display is charged once a day generally is improved to the mode that the existing MR head-mounted display is charged once a week generally, the mode that the existing MR head-mounted display is charged once a month generally, the mode that the existing MR head-mounted display is charged once a year generally, the mode that the existing MR head-mounted display is charged once a year generally and the mode that the existing MR head-mounted display is charged once a year generally are improved, and the charging time can be customized. According to the utility model, the problems of difficult charging, many charging times, uncontrollable charging and the like of the existing MR head-mounted display are solved, long-term power support is provided for the Internet of Things intelligent terminal of the Internet of Things in the future, the charging time of a user is saved, and the use efficiency of the user is improved. Therefore, transformation of everything digitization can be accelerated, and rapid development of artificial intelligence and the Internet of Things is promoted.

The invention provides a broadband carrier and micropower wireless dual-mode communication data acquisition method and device, and relates to the technical field of electric power communication. The method comprises the following steps: issuing acquisition task configuration information to a first dual-mode communication module; the first dual-mode communication module is controlled to distribute the data items and the collection periods to the second dual-mode communication modules according to the task numbers, and the second dual-mode communication modules are controlled to obtain the collected power data; in the acquisition period, controlling the first dual-mode communication module to send a freezing data request message to each second dual-mode communication module, controlling each second dual-mode communication module to package the power data into a freezing data response message according to the freezing data request message, and sending the freezing data response message to the first dual-mode communication module; controlling the first dual-mode communication module to convert the frozen data response message into a report message; and a report message sent by the first dual-mode communication module is received, the report message is analyzed to obtain the electric power data, and minute-level data acquisition can be realized.

The invention relates to the technical field of micro-power-consumption energy collection, in particular to a micro-power-consumption energy collection circuit integrating the functions of micro-power-consumption energy collection and storage, micro-power-consumption output control and output voltage stabilization control. According to the circuit, high-precision and low-power-consumption energy collection and control elements are adopted, and it is ensured that high energy collection efficiency can still be obtained in the extremely-low-power-consumption operation state. Meanwhile, all the units work cooperatively, and concentrated collection and effective utilization of micro-power energy are achieved. The circuit can be widely applied to various internet-of-things terminal devices and the like, can be matched with a low-power photovoltaic panel, a piezoelectric power generation piece, a small-size wind driven generator, temperature difference power generation equipment, a nuclear battery and the like to collect weak energy, can intermittently and centrally release voltage-stabilized high power, and can provide powerful technical support for internet-of-things application scenes.

The invention relates to the technical field of micro-grid intelligent scheduling, and discloses a micro-grid risk constraint scheduling method based on demand response participation, which comprises a pre-scheduling stage and a re-scheduling stage, scheduling a controllable micro power supply and demand response in the microgrid through the economic model to achieve supply and demand balance; in the re-scheduling stage, the standby power supply consumption is added into the scheduling of the micro-grid, and the expected profit of demand response consumption, standby unit consumption and controllable micro power supply cost investment at the current electricity price in a safe frequency state is obtained through a conditional risk constraint scheduling model; demand response is added into micro-grid dispatching, and it is guaranteed that operators are within the safe frequency range, and profit maximization is achieved.

The invention provides a power network topology identification method and system based on an intelligent fusion terminal, and the technical scheme adopted by the invention is as follows: constructing an orthogonal spreading code sequence and distributing the orthogonal spreading code sequence to each end node, and utilizing a power line power frequency zero crossing point as a whole network physical synchronization reference; controlling all end nodes to simultaneously perform parallel physical modulation of micropower; at a fusion terminal side, carrying out differential preprocessing on the collected superposed and synthesized waveform data, carrying out iterative de-spreading by using a serial interference elimination algorithm based on in-situ waveform template learning, and analyzing the signal intensity of each node; and finally, determining the physical topology affiliation in combination with multi-port competition judgment logic. According to the invention, the technical problems of low topology identification efficiency and low identification accuracy in strong background noise and signal crosstalk environments can be solved.

The micro-power DCDC converter comprises a transformer, the transformer comprises a magnetic core and two windings, the magnetic core is of a square ring structure and is integrally formed by ferrite materials, and four side columns are formed; and the two windings are respectively wound on the two side columns of the magnetic core to form non-crossed and overlapped layout positioning of the two windings. Compared with the prior art, according to the scheme, the utilization rate of the window area of the magnetic core can be increased, the overall size of a high-isolation product can be reduced, the consistency of isolation voltage resistance, isolation capacitance and leakage inductance can be better, and the magnetic core is suitable for mechanical winding of a large-wire-diameter winding and particularly suitable for a micro-power product with the high isolation voltage resistance requirement.

The invention belongs to the technical field of electric power wireless communication modules, and particularly relates to an electric power special micropower wireless communication module which comprises a wireless communication module body, a power supply bin is fixedly connected to the lower portion of the wireless communication module body, a fixing block is fixedly connected in the power supply bin, and extrusion mechanisms are arranged at the left end and the right end of the fixing block. The two extrusion mechanisms are symmetrically arranged, each extrusion mechanism comprises a concentric-square-shaped frame, the concentric-square-shaped frames are fixedly connected with the power source bin, an extrusion block is arranged at the end, close to the fixing block, of each concentric-square-shaped frame, and each extrusion block penetrates through the end, close to the fixing block, of the corresponding concentric-square-shaped frame and is in sliding connection with the end, close to the fixing block, of the corresponding concentric-square-shaped frame. The batteries of the wireless communication module body can be sequentially replaced, the wireless communication module body cannot be powered off or shut down during battery replacement, and the wireless communication module body can be quickly and conveniently taken down from a power cabinet for replacement operation.

The invention discloses an electromagnetic generator for ultralow-frequency vibration energy conversion and a working method, and belongs to the technical field of vibration energy collection and micro-power generation, the electromagnetic generator comprises a base, an electromagnetic induction assembly, an inner rotor, a transmission device and an upper cover, a hole is formed in the center of the electromagnetic induction assembly, and the inner rotor is arranged in the hole; the electromagnetic induction assembly comprises an outer rotor and a stator, the outer rotor and the stator are oppositely arranged up and down, a magnet is arranged on the outer rotor, and a coil is arranged on the stator; the base is connected with the bottom of the inner rotor through a thrust bearing, the middle of the inner rotor is connected with the upper cover through a linear bearing, the top of the inner rotor is connected with the upper cover through a transmission device, and the inner rotor is further connected with the outer rotor through a one-way bearing. The base is further connected with an upper cover through a linear bearing, and a spring is arranged between the upper cover and the linear bearing. The ultra-low-frequency vibration energy in the environment can be collected, and compared with a traditional electromagnetic energy harvester, the energy harvesting efficiency is higher.

The present invention provides a micro-power energy harvesting device, system and method based on DC corona ion flow, including a connection conductor connected to a high-potential device, an energy harvesting box connected to the connection conductor, and a corona electrode connected to the energy harvesting box. Among them, the high-potential device is a DC transmission line, and the energy harvesting box includes a filtering module, a control and auxiliary module, and an energy harvesting module; the micro-power energy harvesting device is connected to the DC transmission line by the connection conductor, harvests energy through the DC corona ion flow released by the corona electrode, and uses the energy harvesting box to reduce the electromagnetic interference generated by corona pulses to protect the backend sensing and data transmission devices. The present invention solves the problem that it is difficult for wireless sensors to harvest energy in a DC constant field by utilizing the ion flow generated by the corona loss of high-voltage DC transmission lines, and has the advantages of small volume, flexible placement, stable output, etc., and has strong application prospects.

The invention provides an elevator type micropower repeater and a signal coverage method thereof, which can improve the quality of wireless communication in an elevator and solve the problems of signal attenuation and interruption caused by movement of the elevator in the prior art, and a frequency conversion module of a main control unit converts a signal of a first frequency band from a macro station into a second frequency band, so that the signal coverage efficiency is improved. The signal of the second frequency band is received by a receiving antenna of the car unit, the frequency conversion module converts the signal of the second frequency band received by the receiving antenna back to the first frequency band and sends the signal of the first frequency band by the sending antenna, and the signal of the first frequency band can be received by the terminal; the frequency conversion module of the lift car unit converts the signal of the first frequency band received by the receiving antenna into a second frequency band and sends the signal through the sending antenna, the receiving antenna of the main control unit receives the signal of the second frequency band, and the frequency conversion module of the main control unit converts the signal of the second frequency band received by the receiving antenna back to the first frequency band; and the signal of the first frequency band can be received by the macro station.

The utility model relates to the technical field of low-voltage transformer area charging piles, in particular to a protocol conversion device suitable for a large-scale alternating current and direct current charging pile, which comprises a miniature circuit breaker and a protocol conversion module which are fixedly connected, and a microprocessor, a voltage transformer, a current transformer and a humidity sensor are arranged in the miniature circuit breaker. The dual-mode communication module, the HPLC communication interface and the micro-power wireless communication interface are all electrically connected with the microprocessor, and the protocol conversion module comprises a protocol conversion chip, an RS485 interface and a CAN interface which are all electrically connected with the microprocessor; an alternating current and direct current charging pile comprises a protocol conversion device and further comprises a power supply, a control unit A and a control unit B. The internal space of the charging pile can be saved, and intelligent charging management is achieved.