68results about How to "Solve attenuation" patented technology

The invention relates to a pressure pipeline ultrasonic internal detection automation device; a purpose comprises that the provided device can meet detection requirements of a larger-diameter pipeline and has the characteristics of high detection accuracy and high detection efficiency. The technical scheme comprises that the pressure pipeline ultrasonic automatic detection device comprises a pipeline crawling robot, a probe assembly device, encoders, centralizers, supporting frames, a phased array module device and an ultrasonic detecting instrument; the probe assembly device comprises a first annular phased array probe assembly, a second annular phased array probe assembly, a conical phased array probe assembly for detecting defects of inner and outer surfaces and an interior circumference, and corresponding probe holding devices; the first annular phased array probe assembly, the second annular phased array probe assembly and the conical phased array probe assembly are each composed of more than 3 of 128 array element phased array probes; ultrasonic waves emitted by piezoelectric crystal plates of the probe assemblies firstly pass through an annular concave lens and then scan circumferential pipeline walls.

The invention discloses a high-voltage lithium cobalt oxide cathode material for a lithium-ion battery and a preparation method of the high-voltage lithium cobalt oxide cathode material. The high-voltage lithium cobalt oxide cathode material is prepared from a doped lithium cobalt oxide matrix and a coating on the surface of the doped lithium cobalt oxide matrix, wherein a general formula of the doped lithium cobalt oxide matrix is Li<x>Co<1-y>M<y>O<2-z>N<z>; the general formula of the coating is LiNi<x'>Co<y'>Al<z'>O<2>; and the preparation method comprises the following steps: firstly, obtaining the lithium cobalt oxide matrix Li<x>Co<1-y>M<y>O<2-z>N<z> through once sintering; secondly, preparing a lithium cobalt oxide cathode material precursor coated with Ni<x'>Co<y'>Al<z'>(OH)<2> on the surface by liquid-phase co-precipitation reaction; and finally obtaining the high-voltage lithium cobalt oxide cathode material through twice sintering. The high-voltage lithium cobalt oxide cathode material prepared by the method is good in processability and high in compaction density, has relatively high specific capacity and good cycle performance in a high-voltage state, and can be stably circulated at high voltage of 3.0V to 4.5V.

The invention provides a pixel unit driving circuit, a pixel unit driving method, a pixel unit and a display device. The pixel unit driving circuit comprises a driving thin film transistor, a first switch element, a storage capacitor and a driving control unit, wherein the source of the driving thin film transistor is connected with a data wire through the first switch element; the drain of the driving thin film transistor is respectively connected with a positive electrode of an organic light emitting diode (OLED) and the low level output end of a driving power supply; the source of the driving thin film transistor is connected with the high level output end of the driving power supply through the driving control unit; the gate of the driving thin film transistor is connected with the drain of the driving thin film transistor through the driving control unit; and the driving control unit controls the driving thin film transistor to work in a saturated region and voltages of the gate and the source of the driving thin film transistor to compensate for threshold voltage by controlling charging and discharging of the storage capacitor. By the invention, the problems of non-uniform brightness of an OLED panel and brightness attenuation are solved.

The invention discloses an organic light emitting diode driving circuit, a display panel which uses the circuit, a display and a driving method, which are designed to solve the problem that the brightness and uniformity of an organic light emitting diode are affected by the threshold voltage of a driving unit of the existing driving circuit. The organic light emitting diode driving circuit disclosed by the invention comprises a driving unit, a threshold compensation unit and an organic light emitting diode. A preferable circuit structure comprises five switching tubes, one driving tube, one capacitor and one organic light emitting diode, wherein the switching tubes and the driving tube are N type thin film transistors preferably. The working principle of the organic light emitting diode driving circuit is that the threshold voltage Vth of the 6T1C circuit compensation driving tube is utilized to eliminate the phenomenon of an inconsistent working state of the organic light emitting diode caused by different threshold voltages of the driving tube of the integrated circuit, thereby solving the problems of brightness and uniformity of the organic light emitting diode.

The invention discloses an inverter output filter with a set of series resonance subcircuits. The inverter output filter comprises a traditional LCL output filter body and further comprises a series resonance subcircuit set formed by the N series resonance subcircuits mutually connected in parallel. The N series resonance subcircuits mutually connected in parallel are all connected with a capacitor in the LCL output filter body in parallel. An inverter is connected with a power grid through the inverter output filter. According to the inverter output filter with a set of series resonance subcircuits, the N series resonance subcircuits can respectively filter first N-time switching frequency harmonic components in the output current of the inverter, and therefore the total cost and the total size of the inverter output filter can be reduced.

The invention relates to a lithium ion battery ferrous phosphate manganese lithium positive electrode material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The positive electrode material comprises a core layer and a shell layer, the core layer is made of lithium manganese phosphate, and the shell layer is made of lithium iron phosphate. Manganese source compound and phosphorus source compound are used as raw materials to compound the manganese phosphate core layer, then iron source compound is introduced, through the solubility product principle and exchanging of iron ions and manganese ions, a ferrous phosphate manganese precursor of the core-shell structure is obtained, then lithium mixing and high-temperature calcination are carried out, and ferrous phosphate manganese lithium of the core-shell structure is prepared. The ferrous phosphate manganese lithium positive electrode material, on one hand, can improve a voltage platform and energy density, and on the other hand, can solve the problems of the unstable structure and severe capacity fading due to the fact that manganese is located in the core layer and prevented from making direct contact with electrolyte for dissolution.

The invention discloses a packaging module of a lower-power light emitting diode (LED), comprising an aluminum substrate and an LED luminescent chip. The aluminum substrate sequentially consists of an aluminum substrate copper clad layer, an insulating thermal conductive adhesive layer and an aluminum base layer, and the LED luminescent chip is placed on the aluminum substrate. The aluminum substrate is provided with a counter bore at the placing position of the LED luminescent chip. The aluminum substrate copper clad layer and the insulating thermal conductive adhesive layer at the corresponding position of the aluminum substrate are removed, and high thermal conductive elargol is utilized for filling and solidification. The LED luminescent chip is connected with a circuit on the aluminum substrate copper clad layer through a metal wire and packaged with a transparent silica gel layer to form a luminescent module. The invention solves the problems of radiation and attenuation of the LED chip as well as the lighting angle and brightness contradiction of a low-power chip, and ensures that the low-power LED luminescent chip can be applied to illumination.

The invention relates to a method for controlling surrounding rock deformation of a gateway subjected to repeated overhead mining by using a hollow grouting anchor cable. The method comprises the following implementation steps of: performing repair brushing on the section of the gateway, reinforcing support in a bottom plate gateway to be mined in an advance face which is 280-320 meters in range by adopting high-performance pre-stressed anchor rods, and meanwhile, arranging a metal net on the entire section of the gateway; arranging a novel hollow grouting anchor cable between a top plate of the gateway and the high-performance pre-stressed anchor rods on both sides; grouting on the surface of the surrounding rock of the gateway for enclosing; and injecting a grouting material into the hollow grouting anchor cable. The method has the characteristics of high setting load, sudden increase in resistance and high bearing capability, the problems of high gateway deformation, strong heaving floors and difficulty in maintaining can be well solved, the gateway repair times are reduced, and the gateway support cost is reduced effectively; and the method is particularly suitable for solving the problems of rapid attenuation and loss of anchoring force caused by looseness, breakage and large deformation of surrounding rock due to repeated overhead mining on the gateway.

The invention provides a pixel unit driving circuit, a pixel unit driving method, a pixel unit and a display device. The pixel unit driving circuit comprises a driving thin film transistor, a first switch element, a storage capacitor and a driving control unit, wherein the gate of the driving thin film transistor is connected with the first end of the storage capacitor and respectively connected with the drain of the driving thin film transistor and the low level output end of a driving power supply through the driving control unit; the second end of the storage capacitor is connected with the high level output end of the driving power supply; the source of the driving thin film transistor is connected with a negative electrode of an organic light emitting diode (OLED) through the first switch element and connected with a data wire through the driving control unit; and the drain of the driving thin film transistor is connected with the low level output end of the driving power supply through the driving control unit. The driving thin film transistor is guaranteed to work in a saturated region, and voltages of the gate and the source of the driving thin film transistor compensate for threshold voltage by controlling charging and discharging of the storage capacitor, so that the brightness of an OLED panel is uniform, and the problem of brightness attenuation is solved.

The invention provides a probe rotary type ultrasonic flaw detection device. An ultrasonic flaw detector is embedded into an ultrasonic rotary machine head in a modularized manner to form an ultrasonic flaw detection module. The ultrasonic flaw detector and the ultrasonic rotary machine head rotate together to remove relative movement between the ultrasonic flaw detector and the ultrasonic rotary machine head; and the ultrasonic flaw detector and the ultrasonic rotary machine head are fixedly connected by a coaxial cable. The ultrasonic flaw detection module can carry out digital processing and compression on a flaw detection signal and then the flaw detection signal is transmitted to a fixed transmitter in a wireless manner; and then the flaw detection signal is uploaded to a computer by the fixed transmitter to be subjected to treatment and waveform display. According to the probe rotary type ultrasonic flaw detection device disclosed by the invention, the contact problem of electric brush coupling and signal attenuation and anti-interference problems of capacitance coupling in a traditional probe rotary type ultrasonic flaw detection device are solved, the signal to noise ratio of flaw detection is improved and the rotary speed of a probe can also be improved.

The invention discloses a color automatic adjustment method and a color automatic adjustment device, which are applicable to an image output device. The method comprises the following steps of: acquiring the accumulated use time of the image output device; acquiring the corresponding color intensity attenuation value of the accumulated use time; and regulating the color intensity of the image output device according to the color intensity attenuation value. The color automatic adjustment method and the color automatic adjustment device can solve the problem of color attenuation and color shift so as to obtain pictures of a better effect.

The invention belongs to the technical field of preparation and application of nano materials and particularly relates to a carbon-coated Li4Ti5O12-TiO2 / Sn nanocomposite and preparation and application thereof. The carbon-coated Li4Ti5O12-TiO2 / Sn nanocomposite is composed of 19wt%-65wt% of Li4Ti5O12, 11wt%-57wt% of TiO2, 23wt%-49wt% of Sn and 1wt%-24wt% of a carbon coating layer. The carbon-coated Li4Ti5O12-TiO2 / Sn nanocomposite gives play to synergistic effects of the carbon coating layer with functions of electronic conductivity improvement and ion permeability improvement, the metal Sn with high specific capacity and a one-dimensional nano Li4Ti5O12-TiO2 substrate with small size change in an electrochemical lithium intercalation process, shows excellent electrochemical performances and has a promising application prospect in fields of lithium ion batteries in fast-charge electronic products, electric vehicles and the like.

The invention relates to a system and a method for long-distance transmission of MIPI (Mobile Industry Processor Interface) camera signals. A transmission device is arranged between a camera test device and a camera under test. The camera test device is connected with the transmission device through a high-speed connecting line. The camera under test is connected with a signal separation circuit and a signal conversion circuit in sequence. The camera under test is connected with the power signal of the camera test device through a power connecting line, and transmits the control signal of the camera test device through a control connecting line. The control signal is used to configure the parameters of the camera under test. The signal offset, jitter, attenuation and distortion problem caused by long transmission distance and the weak anti-interference ability of MIPI image signals during signal transmission between the camera under test and the camera test device is solved. The camera test device can detect a high-performance MIPI camera over a long distance under large data volume and high frame rate. Industrial inspection of cameras is facilitated.

The invention discloses a formation technology of a valve control lead-acid storage battery for an electric vehicle. The formation technology comprises the following steps: (1) manufacturing of lead powder; (2) manufacturing of slab lattices; (3) surface treatment of slab lattices; (4) manufacturing of pole plates; (5) assembly technology; and (6) charging technology. By adopting formation technology employing new material prescription, new structure, new technology, new technique and the like, the industry technological problem of the discharge of a plenty of sewage containing heavy metal(such as lead and cadmium) in traditional technology is solved, thus laying the foundation for energy conservation and emission reduction.

The invention discloses a test method for a poisson ratio of a continuous fiber enhanced resin-based composite material. The test method has the advantages that (1) the shortcomings of the existing composite material poisson ratio test technology are overcome, and a novel FBG test method for the poisson ratio of the composite material is provided based on a fiber Bragg grating string technology; (2) the problem that a test piece is low in surface quality, non-uniform in thickness, non-uniform in width, low in parallelism and the like caused by the conventional composite material test piece vacuum bag and thermal pressing tank manufacturing technology is solved, a manufacturing technology for a continuous fiber enhanced resin-based composite material standard test piece is provided based on a closed type thermal die pressing technology, and the problem of separation of the composite material standard test piece with the built-in fiber Bragg grating string from a rigid closed type die is focused to be solved, and convenient, precise and effective test on the poisson ratio of the composite material is realized.

The invention discloses a lithium ion battery silicon-carbon composite negative electrode material composite conductive agent, a negative plate and a preparation method of the negative plate. In termsof mass percentage, the composite conductive agent comprises the following solid components: 60-95% of a silicon-carbon composite material, 0.05-0.1% of carbon nanotubes, 0.5-2% of graphene, 0-20% ofan auxiliary carbon black conductive agent, 1-6% of carbon nanofibers, 1-5% of a dispersing agent and 2-8% of a binder. The invention also discloses a negative plate of the composite conductive agentand a preparation method of the negative plate. The lithium ion battery using the silicon-carbon composite negative electrode material composite conductive agent for the lithium ion battery providedby the invention is low in impedance and long in cycle life; and the overall performance of the lithium ion battery is greatly improved, the long-time use requirements of electronic products can be met, the market application prospect of products of battery manufacturers can be improved, and the important production practice significance exists.

The invention discloses a dynamic sealing structure for a high-temperature kiln. The dynamic sealing structure for the high-temperature kiln is suitable for a dynamic sealing industry of high-temperature rotating kiln in the high temperature field of chemical industry; the structure is composed of a dynamic rotating part, a static fixing part, sealing packing, a compression retaining ring, a pressurized elastic bag and a cooling pressure pump station. A high-pressure cooling medium is conveyed to the pressurized elastic bag by the cooling pressure pump station, so that the pressurized elasticbag is expanded to push the compression retaining ring to apply pressure on the sealing packing, and thus the sealing effect is realized, the dynamic sealing can be completed, and meanwhile, liquid ofthe pressure pump station is used as the cooling medium, so that the sealing is not affected by the high temperature.

The invention discloses an intense laser sampling attenuator. A diffuse reflection sampling plate is arranged on the upper portion of the interior of the sampling attenuator, and the lower portion of the diffuse reflection sampling plate is sequentially and fixedly connected with an attenuation cavity plate, a sampling laser scattering plate and an attenuation base plate. Diffuse transmission materials are arranged between the sampling laser scattering plate and the attenuation base plate. The diffuse reflection sampling plate is used for conducting diffuse reflection on non-sampled intense lasers and has a high damage threshold, a through hole in the diffuse reflection sampling plate is used for conducting space sampling on laser beams, the sampling laser scattering plate is used for conducting diffuse reflection on sampled intense lasers, an attenuation cavity is used for conducting attenuation and homogenization on the sampled lasers, the diffuse transmission materials are used for sampling the scattered and homogenized lasers again, and a through hole in the attenuation base plate is used for conducting attenuation on the diffuse transmission sampled lasers again. By means of the intense laser sampling attenuator, the problem that the intense lasers which last for about tens of seconds and are 10 Kw / cm<2> in power density cannot be directly sampled and attenuated by an existing sampling attenuator is solved, and the important promoting effect on intense laser parameter measurement is achieved.

The invention relates to a charged biomimetic implantation film material regulated and controlled through magneto-electric coupling and a preparation method thereof, aiming at solving the technical problems that the potential is attenuated and the long-period repair effect is not stable after an existing charged biological material is implanted for a long period. The charged biomimetic implantation film material is a thin-film-shaped material prepared from a ferroelectric high-molecular polymer, magnetic particle filler and an organic solvent. The invention also provides the preparation methodof the charged biomimetic implantation film material. The charged biomimetic implantation film material can be widely applied to the technical field of tissue defect repairing materials for surgicaloperations.

The invention relates to a vertical input channel protector of an oscilloscope, which comprises a direct current power supply module capable of providing a direct current power supply for the vertical input channel protector of the oscilloscope, an amplifying circuit, a fixed attenuator, a protective tube, an impedance matching network and a bias regulating circuit. The invention aims to provide the vertical input channel protector of the oscilloscope, which can set a protection threshold according to actual needs, does not change the characteristic impedance of the original circuit, does not generate distortions to input signals, and solves the technical problems that a vertical input channel protection circuit of the prior oscilloscope has high protection threshold, changes the characteristic impedance of the original circuit and generates distortions to the input signals. The vertical input channel protector of the oscilloscope generates no influence on the amplitudes of tested signals and front and back edges, and also solves the problems of impedance matching and signal attenuation when the input signals are small and the protector generates no protective effects.

The invention provides a wireless vibrating wire acquisition system and method for synchronous sampling. The system comprises a main control end (1), a vibrating wire sensor acquisition end (2) and a vibrating wire sensor (3). The main control end (1) performs networking and data interaction with all acquisition nodes in the vibrating wire sensor acquisition end (2) in a wireless mode; each acquisition node in the vibrating wire sensor acquisition end (2) receives and responds to all operating commands sent by the main control end (1); and the vibrating wire sensor (3) senses micro deformation of a part to be detected such as a bridge, a slope and the like, converts the micro deformation into electrical signals and transmits the electrical signals to the vibrating wire sensor acquisition end (2) for acquiring. The method comprises: step 1, initializing the system; step 2, sending a networking connection command; step 3, starting synchronous sampling; step 4, acquiring data of each acquisition node; and step 5, storing and uploading the data. By adopting the wireless mode, the synchronous sampling function of each node is realized, the detection efficiency is greatly improved, and the accuracy and the reliability of data are ensured.

The invention discloses a skeleton fiber bundle optical cable with semicircular skeleton grooves, and relates to an optical cable applied to a communication network. The skeleton fiber bundle optical cable comprises a skeleton with a cylindrical hollow structure. A central reinforcement part is arranged in the center of the skeleton. A layer of outer sheath is extruded on the outer wall of the skeleton. The skeleton grooves are uniformly distributed along a circumferential direction on the inner wall of the skeleton, and have semicircular cross sections. A plurality of fiber bundles with circular cross sections are distributed in each semicircular skeleton groove. The fiber bundles with the circular cross sections are arranged in the skeleton grooves with the semicircular cross sections, so that the problems of great diameter, low yield, high fiber attenuation of fiber ribbons, and the like of an ordinary skeleton fiber ribbon optical cable are solved.

The invention relates to a pair of polylactic acid fiber socks, belongs to the field of textile technologies, and aims to solve the problem that sock yarns are inconvenient to color and cannot be effectively colored in the prior art. The polylactic acid fiber socks are formed by knitting the yarns; the yarns are 100 percent pure polylactic acid fiber colored yarns or blended yarns of the polylactic acid fibers and colored cotton or colored viscose fibers. The polylactic acid fiber socks are formed by blending the polylactic acid fibers and the colored viscose or the colored cotton fibers, so that the advantages of the polylactic acid fibers and the colored viscose or the colored cotton fibers are kept, and the socks have the advantages of bacteriostasis, breathability, softness, high strength, high elasticity and the like; the polylactic acid fiber socks have the advantages of environment-friendly production process and natural coloring, so that a dyeing step of the polylactic acid fiber socks is avoided, and the problem of attenuation of powerful and other active ingredients during dyeing of the polylactic acid fibers are completely solved.

The invention relates to the field of chemical engineering, and particularly discloses a polyurethane adhesive, a preparation method thereof and an aluminum cellular plate. The polyurethane adhesive comprises a component A and a component B, and the component A comprises the following raw materials: a hydroxyl-terminated polyurethane prepolymer, polyether polyol, a powder water absorbent and an inorganic filler. The polyurethane adhesive prepared by the preparation method disclosed by the invention has excellent bonding strength. By compounding a hydroxyl-terminated polyurethane prepolymer synthesized by adopting a prepolymerization method with bisphenol A / propylene oxide polyether glycol, the bonding strength and the flexibility of the polyurethane adhesive are ensured, mechanical strength is high, after curing for 60 days, the peeling strength and the plane tensile attenuation of the roller are not greater than 10%, the polyurethane adhesive can be widely applied to the field of aluminum honeycomb plates, the problem that the bonding strength of the cured polyurethane adhesive is attenuated when an existing polyurethane adhesive is assembled into an aluminum honeycomb plate is solved, and the provided preparation method is simple, low in cost and free of pollution to the environment.

The related public information distribution system based on GPRS platform comprises: a transmission client including a display management workstation, a server and a display management unit to decode and distribute audio and video data; a network platform to transmit audio and video signal, and a receiving terminal including a GPRS module, a receiving control module, a audio and video displayer. This invention can apply remote wireless network control.

The present invention discloses a preparation method for fluoro-propane and the relative device. The tower kettle exit of the first-level fluorination reactor is connected with a first-level circulated pump, a first-level heat-exchanger and the circulating entrance of the first-level fluorination reactor. The tower top exist of the first-level fluorination reactor is connected with the entrance of the first-level refluence tower; the exit of the first-level refluence tower is connected with the entrance of the hydrochloric separated tower; the exit of the hydrochloric separated tower is connected with the tower kettle entrance of the second-level fluorination reactor. The tower kettle exit of the second-level fluorination reactor is connected with the entrance of the second-level refluence tower; the tower kettle exit of the second-level fluorination reactor is connected with a second-level circulated pump, a second-level heat-exchanger and the circulating entrance of the second-level fluorination reactor. The reaction device respectively adopts a circulated pump and a heat-exchanger to form an outer circulation so as to improve the contact condition for the active agent and the catalyzing agent. The method is to prepare the propane. The present invention has the advantages of higher reacting selectivity and conversion ratio, longer using time for the catalyzing agent and lower device investment and so on.

The invention provides a railway construction safety protection system based on a radio technology. The railway construction safety protection system is characterized by comprising a safe hand ring, a locomotive position transmitter and a safety officer supervision device; an MCU microprocessor main control chip of the safe hand ring is connected with a receiving module, a vibration motor capable of alarming through voice vibration, a display screen and an RF transmission chip; an MCU microprocessor main control chip of the locomotive position transmitter is connected with a GPS receiving module, the display screen and the RF transmission chip, and the RF transmission chip is connected with a radio frequency power amplification module; an MCU microprocessor of the safety officer supervision device is connected with the GPS receiving module, the display screen, the RF transmission chip, a key configuration input device, a vibration motor capable of prompting through voice vibration and a buzzer; or, the locomotive position transmitter is a tunnel operation transposer. Construction personnel wear the safe hand ring and directly receive signals sent by a locomotive, the intermediate links of signal transmission and processing are omitted, the response is rapid, and the safety of the construction personnel is ensured.

The invention provides a display panel, and the display panel comprises a pixel definition layer which comprises light-emitting openings distributed in an array; the light-emitting layer is arranged in the light-emitting opening; and the photosensitive element is arranged on the pixel definition layer, and the projection of the photosensitive element on the pixel definition layer is located outside the light-emitting opening. According to the display panel, the light sensing element is arranged above the light emitting opening of the display panel, the light sensing element can better sense the light rays emitted upwards by the light emitting layer, and the light signals are converted into the electric signals to be fed back, so that the light emitting brightness of the display panel is compensated; the problems of brightness attenuation and poor brightness uniformity after long-time use of an existing display panel are solved.

The invention relates to a hot extrusion forming method of a bismuth telluride thermoelectric material. The method comprises the following steps: obtaining elementary substance raw materials of Bi, Te, Sb and Se; crushing the simple substance raw material into blocks with preset diameters; weighing the blocks according to a preset stoichiometric ratio; mixing the blocks, and smelting in a vacuum high-frequency induction smelting furnace in a first protective gas environment to obtain a cast ingot; the cast ingot is subjected to ball milling, and powder is obtained; screening the powder by using an ultrasonic inspection sieve; loading the screened powder into an extrusion die, and carrying out hot extrusion in a second protective gas environment to obtain a bismuth telluride bar; and placing the bismuth telluride bar in a tubular atmosphere furnace, and carrying out heat treatment in a third protective gas environment to obtain the bismuth telluride thermoelectric material. According to the method, powder metallurgy and a hot extrusion process are combined, so that precise forming and performance improvement of the high-brittleness bismuth telluride thermoelectric material are realized, and the problems of low reliability and performance degradation of a thermoelectric refrigerator are solved.

A power line carrier / NB-IOT composite communication mine electromechanical equipment management and control system comprises electromechanical equipment, a power distribution cabinet, a control switch, a power line carrier communication module, an NB-IOT communication module, a local controller, a carrier power wire, a control host, a management and control platform, a mobile terminal, a monitor and a power bus. The system is characterized in that the electromechanical equipment is mounted at an underground fixed position; an electromechanical equipment power line is connected with the power output end of the alternating current contactor of the control switch; the power input end of the alternating current contactor of the control switch is connected with the sending coupling controller of the power line carrier communication module; the sending coupling controller is connected with a carrier power wire and transmits power and monitoring information through the carrier power wire, andthe other end of the carrier power wire is connected with a power bus sequentially through a power carrier module receiver coupling controller, the local controller and a closing switch on the powerdistribution cabinet side to form a power loop of electromechanical equipment; and the local controller is also in circuit connection with the NB-IOT communication module, and the local controller andthe NB-IOT communication module perform bidirectional signal feedback.