100results about How to "Eliminate security concerns" patented technology

The invention provides a truck tarpaulin system and a compartment. The truck tarpaulin system comprises a tarpaulin frame, a tarpaulin cover matched with the tarpaulin frame and a crawling device arranged on the tarpaulin cover, and a guide piece is arranged on the tarpaulin frame; the crawling device comprises a crawling seat fixed on the tarpaulin cover; the transmission assembly comprises a fixing frame located in the crawling base. The transmission shaft is arranged along the center line of the crawling base, and the two ends of the transmission shaft can penetrate through the fixing frame to be rotationally connected with the crawling base; the transmission part sleeves the outer side of the transmission shaft and can be matched with the guide part; the guide assembly comprises a connecting rod, and one end of the connecting rod is connected with the outer wall of the fixing frame; the guide wheel is rotationally connected with the other end of the connecting rod, the rotating axis of the guide wheel is perpendicular to the rotating axis of the transmission shaft, and the guide wheel makes contact with the inner wall of the crawling base so that relative movement between the fixing frame and the crawling base can be achieved. The crawling device can more stably drive the tarpaulin cover to move along the contour of the tarpaulin frame.

A quick-change type mechanical arm comprises a mechanical arm body, a quick-change device and a tail end gripper. Wherein the mechanical arm comprises at least one cantilever; one end of the lifting arm is connected with the lower part of the cantilever; one end of the swing arm is movably connected with the other end of the lifting arm; the quick-change device is arranged at the other end of the swing arm and comprises a quick-change male disc, a quick-change female disc and a locking mechanism; and the tail end gripper is connected to a quick-change mother disc of the quick-change device. Through the quick-change design, the replacement convenience of switching of the mechanical arm body and the multiple sets of front-end grippers under the complex working conditions of different workpieces is achieved, and the product replacement rhythm is improved; equipment gripper innovation is optimized, the number of mechanical arm bodies is reduced, and the space of a production site is saved; and the tail end executing gripper + is flexibly butted, so that the cost of the equipment is reduced. The clamping device is suitable for clamping, moving, positioning and installing parts of line bodies, warehouse logistics, automobile assembly and the like.

The utility model discloses a sports shoe upper and a shoe, the sports shoe upper comprises a shoe upper base layer, the shoe upper base layer comprises a first splicing part, a second splicing part and a third splicing part, the first splicing part corresponds to a forefoot area and a heel area of a human foot; the second splicing part is positioned in the middle section area of the arch between the front sole area and the heel area; the third splicing part extends along the edge of the vamp, is connected with the sole and is connected with the first splicing part and the second splicing part; the fixing line is arranged at the junction of the first splicing part, the second splicing part and the third splicing part; the vamp base layer is formed by splicing a first splicing part, a second splicing part and a third splicing part, and the splicing parts are regions which are formed by weaving TPU yarns in an interweaving mode and have different weaving intensities. According to the sports vamp and the shoe, the softness and hardness of each part of the vamp base layer are adjusted by arranging the areas with different weaving intensities on the vamp base layer, the vamp fits the foot movement of a user, and the sports performance of the user is improved.

The utility model discloses a novel aluminum ingot turnover device which comprises a jacking piece, a positioning piece and a damping piece which are sequentially arranged in the conveying direction of a conveyor, the jacking piece comprises a longitudinal air cylinder, an ejector rod is arranged at the telescopic end of the longitudinal air cylinder, the positioning piece comprises a positioning pin seat installed at the bottom of a conveyor rack, and the damping piece is arranged on the positioning pin seat. The top of the positioning pin seat is provided with two symmetrically-arranged positioning pins, and the positioning pins are arranged corresponding to the arc notches of the ingot block. According to the novel aluminum ingot overturning device, ingot blocks can be automatically positioned and overturned, manual overturning is not needed, manpower is saved, the working efficiency is high, safety accidents of high-temperature scalding and smashing injuries caused by errors are fundamentally eradicated, safety is greatly improved, a certain buffering effect is achieved on the overturned ingot blocks, and the ingot blocks are prevented from being damaged. Damping protection can be conducted on the conveyor, and therefore the service life of the conveyor is prolonged.

The invention relates to the field of water-based UV (ultraviolet) antistatic coatings, in particular to a water-based UV antistatic coating which comprises 40-60 parts of water-based acrylic resin; 5 to 10 parts of tung oil; 5 to 10 parts of rosin resin; a preparation method of the functional film; the method comprises the following steps: 1, preparing a coating, 2, adjusting the state of the coating, and 3, curing to form a film. According to the water-based UV coating, the water-based acrylic resin, the tung oil and the rosin resin are adopted as main constituent materials of the coating, and other additives also adopt low-toxicity and low-irritation environment-friendly materials, so that the prepared water-based UV coating can reduce the VOC emission of the coating and improve the green and environment-friendly properties of the coating, and by adding the antistatic agent and the antistatic monomer into the coating, the anti-static property of the coating is improved. The surface resistance of the coating can be effectively reduced, the antistatic effect of the coating can be kept for a long time, and the coating is ensured to reach an ideal curing state in a short time by adopting a light-heat dual-curing mode when the coating is cured to form a film.

The utility model discloses a remote control device for a double-beam bridge crane, which belongs to the technical field of hoisting equipment and comprises a cart running mechanism, a trolley running mechanism, a lifting hook lifting mechanism, an electrical control cabinet, a receiver, a cab and a crown block illuminating lamp, and the cart running mechanism is provided with the trolley running mechanism, the electrical control cabinet and the crown block illuminating lamp. A cab is arranged below the cart running mechanism, the trolley running mechanism is connected to the top of the cart running mechanism in a sliding mode, the hook lifting mechanism is arranged at the top of the trolley running mechanism, the crown block illuminating lamp is arranged on a bottom cross beam of the cart running mechanism, and the electric control cabinet is arranged on a vertical beam at one end of the cart running mechanism. The device has the beneficial effects that the labor force of operators is greatly reduced, and the operation efficiency and the overall safety coefficient of equipment are greatly improved.

The embodiment of the utility model discloses an electric well floor penetrating cable trough box pre-embedding device which comprises a pre-embedding box body, connecting pieces and fixing parts, openings are formed in the upper end and the lower end of the pre-embedding box body correspondingly, and the two connecting pieces are connected to the first side wall and the second side wall, opposite to each other, of the pre-embedding box body correspondingly; one end of each connecting piece is rotationally connected with the end, close to the opening, of the first side wall or the second side wall, the upper end and the lower end of the embedded box body are each provided with two connecting pieces, and connecting holes are formed in the connecting pieces; and one end of the fixing piece is connected with a first side wall or a second side wall or a third side wall or a fourth side wall of the pre-embedded box body, which is arranged opposite to the first side wall or the second side wall or the fourth side wall. The problems that in the prior art, an electric well floor penetrating cable trough box is constructed in a hole reserving mode, so that the construction efficiency and the construction quality are low, the construction cost is high, and the appearance quality of installation engineering is poor are solved.

The present invention belongs to the field of aviation engine air environment simulation test, and provides an air flow path control method and system for aviation engine air environment simulation test, the method is used to control the air pipe network of the aviation engine air flight environment simulation test bench, including: according to the air environment simulation test subject, constructing the compressed air flow path on-off characteristic matrix of the air pipe network; obtaining the on-off prediction state of all compressed air flow paths at the next moment through the compressed air flow path on-off characteristic matrix and the actual on-off state of all compressed air flow paths at the previous moment; according to the compressed air flow path on-off characteristic matrix and the on-off prediction state, outputting the on-off control state of each compressed air flow path in the air pipe network at the next moment. The present invention can perform operation guidance and state judgment on the state control of different compressed air flow paths in the test, ensure the reliability and safety of the test, and reduce the probability of low-level quality accidents caused by human factors.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

This utility model provides a visual cement mixing pile length positioning device, belonging to the field of cement mixing pile technology. It includes: a pile driver; a mixing rod, which is driven to rotate and extend downwards by the pile driver's drive equipment; and a marking structure movably disposed outside the mixing rod. The marking structure includes a movable ring, multiple friction wheels, a transmission structure, an infrared rangefinder, and a drive motor. The infrared rangefinder is disposed outside the movable ring and is used to measure the distance between the movable ring and the pile driver. The output end of the drive motor is connected to the shafts of the multiple friction wheels through the transmission structure. The beneficial effects of this utility model are: by setting a movable marking structure outside the mixing rod and combining it with an infrared rangefinder to measure the distance between the movable ring and the pile driver in real time, it solves the problem of needing to manually mark the pile outside the tower, eliminates the safety hazards of falls from heights and accidental collisions caused by manual marking, and ensures the personal safety of construction personnel.

This utility model discloses a quartz cylinder transport vehicle for monocrystalline silicon production, relating to the field of photovoltaic manufacturing technology. It includes an AGV (Automated Guided Vehicle) trolley with a stabilizing frame, and a control mechanism mounted on the AGV trolley. The control mechanism drives the quartz cylinder to move. The control mechanism includes a fixed frame connected to the stabilizing frame. The fixed frame is connected to a support assembly for placing the quartz cylinder via a connector, an electric cylinder, and the fixed component. A second connector is mounted on the fixed frame, and an electric cylinder is hinged to the second connector. The end of the electric cylinder away from the connector is hinged to the fixed component. A support frame is fixedly mounted below the fixed component and is fixedly connected to the stabilizing frame. This quartz cylinder transport vehicle for monocrystalline silicon production, by integrating AGV automatic transport, electric cylinder precise lifting and docking, and an automatic anti-sway fastening mechanism, achieves full automation of the quartz cylinder feeding process, reducing labor costs, operational risks, and labor intensity, while improving production efficiency and safety.

The utility model relates to battery protection technical field discloses an automatic redundancy circuit of battery, including main circuit part and control circuit part, the main circuit part includes first contactor, first diode, second contactor, third contactor, second diode, third diode, permanent load, normal and emergency load, charger and switch, the control circuit part includes first control relay, fourth contactor, relay and fuse, the utility model discloses the circuit design of automatic redundancy of battery system, after detecting charger or battery output back power failure, automatically enable redundancy circuit, use battery to carry out power supply to vehicle, has eliminated the security hidden danger and the accident risk of some vehicle system before cutting off because of circuit failure.

The invention relates to the technical field of crude alcohol rectification processing, in particular to a pre-tower vent gas recovery method and application, and has the beneficial effects that gas secondarily cooled out of a pre-tower enters a purge gas washing tower, steam containing a small amount of methanol is absorbed by soft water and then is vented to a torch, and a large amount of methanol condensable components exist in vent gas, so that the gas can be recycled; a cooler is additionally arranged to further cool vent gas, a liquid phase is sent to a crude alcohol tank and then sent to a rectification system, non-condensable gas is sent to a coal grinding station hot blast stove to replace part of fuel gas, meanwhile, potential safety and environmental protection hazards existing in the vent gas are eliminated, economic benefits are remarkable, primary water serves as a cooler cold source, and the primary water is sent to a desalted water station for use after being heated; the water mixing efficiency of desalted water can be improved, and the water consumption is reduced; meanwhile, non-condensable gas is conveyed to a fuel gas pipe network, the fuel gas consumption is further reduced, the refined alcohol yield is increased, and the comprehensive energy consumption is reduced.

The invention provides a thermal probe charging nursing method. According to the method, the defects formed at the position of the hot probe at the charging opening are solved in the charging nursing process. According to the formation mechanism of shrinkage joints and loose charging defects in the thermal probe charging nursing process, targeted treatment measures are taken, and the charging quality problem of the product in the thermal probe nursing process is solved. The problem of reworking of the thermal probe charging care product caused by charging defects is avoided, and the problems of safety and product quality reduction caused by reworking are eliminated. In the process of solving the problems of shrinkage joints and loose charging defects in the thermal probe charging nursing process, a copper drill rod or a wood ruler is adopted for shifting in solid-phase components settled at the bottom of the charging funnel, and a way for improving the charging density is found for product charging.

The utility model relates to the technical field of blast furnace ironmaking, and discloses an ash bin auxiliary ash discharging device and an ironmaking furnace, the ash bin auxiliary ash discharging device comprises a nitrogen pipeline, the nitrogen pipeline comprises a first air inlet pipe, the output end of the first air inlet pipe is communicated with an ash bin, and two first flow dividing openings are formed in the first air inlet pipe; a flow dividing pipe surrounding the ash bin is connected between the two first flow dividing openings, a plurality of second flow dividing openings are formed in the flow dividing pipe at intervals, and the multiple second flow dividing openings communicate with the ash bin through second air inlet pipes correspondingly. The ash discharging device is simple in structure, convenient to use and capable of achieving rapid ash discharging, the nitrogen valve is opened to pressurize the ash bin when the ash bin is blocked during ash discharging, the ash discharging problem of the ash bin can be effectively solved, potential safety hazards and potential environmental protection hazards during ash discharging are eliminated, and the labor intensity of workers is reduced.

This invention discloses a double-end-face self-cooling mechanical seal, relating to the field of centrifugal pumps. The device includes a cooling sleeve, a transmission fixing component, a lower static seal seat, an upper static seal seat, a lower static seal ring, an upper static seal ring, a lower static seal gland, an upper static seal gland, and two sets of clamping moving rings. The cooling sleeve is inserted into the centrifugal pump impeller shaft and is located at the end of the pump head. The transmission fixing component is located inside the cooling sleeve. The lower static seal seat is installed on the side of the cooling sleeve away from the pump head, and the upper static seal seat is installed on the side of the cooling sleeve closer to the pump head. The two sets of clamping moving rings are slidably connected to both sides of the transmission fixing component. Two sets of elastic elements are provided between the two sets of clamping moving rings and the transmission fixing component. This device uses double independent end-face seals to form a double barrier, preventing direct leakage of the medium to the environment; the integrated cooling sleeve allows the sealing components to be fully immersed and cooled, avoiding dry friction burning of the sealing surfaces; and the double-sided independent elastic pre-tightening achieves independent compensation for wear on the upper and lower sealing surfaces.

This utility model discloses a two-way push-button switch, including a base, a top cover, a button, a waterproof ring, a connector, and a PCB board. Tactile switches are located on both sides of the PCB board, and adapter pressing heads are located on both sides of the button. The top cover covers the base. The key improvement lies in the following: the top cover has a raised rocker step on one side of the button, with a first contact plane at the top of the rocker step contacting the top wall of the button; elastic retaining rings are located on both sides of the button, with a second contact plane on the bottom surface of the retaining groove; and retaining steps are located on both sides of the top cover, with a third contact plane on the bottom surface that adapts to the second contact plane; the rocker step, elastic retaining rings, and retaining steps are all located between the two pressing heads. This design uses multiple sets of planar mating surfaces instead of traditional circular mating surfaces, effectively limiting the radial displacement of the button relative to the top cover, preventing the button from wobbling left and right, and ensuring the alignment accuracy between the pressing heads and the tactile switches; at the same time, it constrains the button pressing trajectory, preventing accidental pressing caused by button tilting when pressing one side or the middle, and eliminating circuit malfunctions.

The invention discloses a preparation method for electrically depositing a MnOx material on carbon fiber paper and construction of a high-specific-energy supercapacitor. According to the method, through acid pickling, chemical oxidation and electrochemical activation treatment on the surface of the carbon fiber paper and then MnOx electro-deposition, a new thought is provided for MnOx electro-deposition on the CFP, the electro-deposition effect is remarkable according to the test result, and the electrochemical performance of the carbon fiber paper is remarkably improved. Furthermore, starting from a decoupling system electrolyte, two different types of electrolytes of Na2SO4 and NaOH are respectively used as positive and negative electrolytes, and a cation diaphragm is additionally arranged, so that a novel super electric device with a Mn / / Zn wide voltage window is successfully assembled, the voltage window is as high as 1.3-2.6 V, and the energy density of the MnOx super capacitor is greatly improved.

This invention discloses a drying and forming device for copper scrap recycling, relating to the field of copper scrap recycling technology. The device includes an extrusion forming box and a screw conveyor for conveying copper scrap. The extrusion forming box contains a mold component to assist in extruding copper scrap into blocks, and a conveyor plate is provided on the extrusion forming box for conveying the formed copper scrap. This invention integrates feeding, drying, and extrusion forming into a single, coordinated operation. The closed conveying system prevents leakage and contamination from copper scrap and cutting fluid. The dried copper scrap has a low moisture content, eliminating safety and quality risks associated with remelting. The pushing process simultaneously drives a cleaning brush to clean the inner wall of the conveyor cylinder, and a separation tank screens broken copper, reducing downtime for cleaning and improving raw material utilization. An elastic limiting component on the conveyor plate buffers the copper blocks and prevents them from rolling back. The entire system operates fully automatically in a cyclical manner, producing dense and easily transportable formed copper billets, significantly improving copper scrap recycling efficiency and reducing production and maintenance costs.

The application discloses a method for controllable preparation of nanoscale calcium carbonate by taking regenerated micro powder as a calcium source, and comprises the following steps: taking the regenerated micro powder obtained by treating the hydrated cement-based material as the calcium source, dispersing the regenerated micro powder in deionized water or a water solution containing magnesium ions to form a reaction system, performing a wet carbonation reaction by introducing carbon dioxide gas into the reaction system, and realizing the regulation of the crystal form and particle size of the obtained calcium carbonate product by synergistically regulating the process parameters such as the composition of the reaction medium, the reaction temperature, the reaction time, the carbon dioxide flow rate and the stirring speed, so as to prepare nanoscale calcite crystal calcium carbonate or nanoscale calcite / aragonite composite crystal calcium carbonate.

The present application relates to a kind of from bottom to top hole foundation assembly type retaining wall construction method, comprising the following steps: S1, excavate first section retaining wall earthwork;S2, install first section retaining wall and retaining wall chuck and the two are assembled together;S3, erect assembly type retaining wall construction equipment, the 3 hoisting points of first section retaining wall are docked with the 3 hoisting lines of the 3 electric winches of assembly type retaining wall construction equipment;S4, excavate second section retaining wall earthwork;S5, install second section retaining wall in the upper portion of first section retaining wall and connect together;S6, first section retaining wall and retaining wall chuck are disassembled;Start assembly type retaining wall construction equipment, release hoisting line, so that first section retaining wall and second section retaining wall overall settlement;S7, after first settlement is completed, retaining wall chuck and second section retaining wall are assembled together;S8, the method of steps S4-S7 is repeated to carry out cyclic operation, until all retaining wall is installed in place.The method can effectively reduce construction difficulty and operation risk, improve construction efficiency, improve construction quality.

The invention relates to a metal coin stamp stamping machine which comprises a machine box body, a mold disc device, a stamping assembly, a feeding assembly and a discharging assembly are arranged in the machine box body, the mold disc device comprises a mold disc body and a mold disc rotation driving unit, a plurality of stamping cavity channels are formed in the circular track of the disc face of the mold disc body, and the stamping assembly comprises an upper stamping mechanism and a lower stamping mechanism. The upper pressing die mechanism and the lower pressing die mechanism are used for cooperatively pressing blanks in the pressing cavity channel, the feeding assembly comprises a feeding mechanism and a feeding mechanism, the feeding mechanism is used for conveying the blanks to the feeding mechanism, the feeding mechanism is used for inputting the blanks into the pressing cavity channel, the discharging assembly comprises a discharging mechanism and a discharging mechanism, the discharging mechanism is used for picking up coin stamps from the pressing cavity channel, and the discharging mechanism is used for discharging the coin stamps. The discharging mechanism is used for outputting the coins. According to the invention, an integrated automatic integration scheme that the mold disc device, the coining assembly, the feeding assembly and the discharging assembly are assembled in the case body is adopted, and the automatic coining machine has the characteristics of automatic operation, high coining processing efficiency and quality, safe operation, stable operation and the like.

The utility model belongs to the technical field of air leakage recovery, and particularly relates to a fan mechanical seal air leakage recovery device which comprises a main fan and a heating furnace, the output end of the main fan is connected with the heating furnace through a pipeline, the outer side of the heating furnace is connected with a second connecting pipe, and the end, away from the heating furnace, of the second connecting pipe is connected with a recovery conveying fan. The output end of the recycling and conveying fan is connected with the second connecting pipe, the input end of the recycling and conveying fan is connected with a first connecting pipe, a collecting piece is installed at the top of the main fan, the end, away from the recycling and conveying fan, of the first connecting pipe is connected with the collecting piece, the collecting piece is a collecting box, and the collecting box is arranged at the top of the main fan. And the collecting box is connected with the first connecting pipe. According to the utility model, leaked coal gas can be effectively collected and recycled, so that environmental pollution and potential safety hazards caused by coal gas leakage into the atmosphere are avoided, meanwhile, the energy loss and the maintenance frequency of the fan are reduced, and the maintenance cost is saved.

The invention relates to an antimony-free compound clarifying agent for photovoltaic glass as well as a preparation method and a use method of the antimony-free compound clarifying agent. The antimony-free compound clarifying agent is characterized by being prepared from the following raw materials in percentage by weight: 43.65 wt.%-35.19 wt.% of mirabilite, 47.62 wt.%-44.44 wt.% of sodium nitrate, 0.79 wt.%-3.80 wt.% of manganese dioxide powder, 7.94 wt.%-5.56 wt.% of sodium chloride powder and 0.0 wt.%-12.5 wt.% of tin dioxide powder. The antimony-free composite clarifying agent for the photovoltaic glass has the advantages that the antimony-free composite clarifying agent for the photovoltaic glass does not contain an antimony oxide component, is harmless to a human body and pollution-free to the environment, can completely replace an antimony-based clarifying agent, and is lower than the antimony-based clarifying agent in cost; when the antimony-free composite clarifying agent is used for producing photovoltaic glass, various properties of the prepared photovoltaic glass are the same as those of photovoltaic glass produced by an antimony-containing clarifying agent.

The invention discloses a method for automatically pushing shear blades of double-side shears, and belongs to the field of shear blade replacement of the double-side shears. The method comprises the steps of designing an automatic blade pushing device, designing automatic control of cutter pushing equipment and designing an automatic positioning function of a cutter changing trolley. The application of the invention not only improves the production efficiency, but also reduces the production cost. Due to the fact that the pushing and positioning process of the shear blade is automatic, manual intervention and errors are reduced, and the consistency and stability of production are improved. Meanwhile, due to the fact that the pushing process is more accurate and efficient, waste and loss in the production process are reduced, and the production cost is further reduced. And on the other hand, a series of safety problems caused by unsmooth communication of post operators in two places are eliminated due to the use of the automatic cutter pushing device, and the original cutter changing time is shortened.

The application belongs to the technical field of aircrafts, and particularly relates to a fluid circulation control based aircraft, which comprises an upper streamlined lifting body and a lower streamlined lifting body, annular slits are arranged on the upper streamlined lifting body and the lower streamlined lifting body, and a conical surface is arranged on the upper surface of the upper streamlined lifting body. The aircraft does not need exposed high-speed rotating mechanical components, fundamentally eliminates the safety hazards of blade injury and blade tip flying off, greatly reduces flight noise and downwash flow intensity, and solves the problems of large noise pollution and harsh take-off and landing site requirements of the rotor aircraft. Compared with the traditional Magnus effect aircraft based on solid rotors, the aircraft adopts a fluid film to replace the solid rotors, completely eliminates the defects of large air resistance, mechanical vibration and large inertia of the solid rotors, and realizes wingless flight, low resistance and high response speed.

The utility model discloses a motorcycle upper link plate, including upper link plate main part, sliding part, in the upper link plate main part along horizontal length direction removal, locking structure is used for fixing the sliding part, be equipped with the threaded fixing hole on the sliding part. The utility model discloses the purpose at to solve the technical problem existing in prior art, provide a kind of motorcycle upper link plate, it provides a kind of set flexibility, security, stability and aesthetic property in one's body optimal solution, successfully solved the long-term pain point in the field of motorcycle mobile phone support installation, greatly improved the riding experience.

The application discloses a method for preventing missing inspection and cheating in safety inspection and wall inspection in a coal mine based on an internet of things. The method is unique in controlling safety inspection and wall inspection, that is, the method adopts an internet of things technology to integrate data of multiple information systems in a coal mine to realize forced restraint on a position, a time and an electronic trace of safety inspection and wall inspection, so that missing inspection and cheating of safety inspection personnel and wall inspection personnel are eliminated.

The invention provides a power transmission line tower grounding resistance unwiring-free measurement method and system, and belongs to the technical field of power transmission line operation maintenance and detection, and the method comprises the steps: constructing a tower equivalent loop model, employing a non-contact transformer to synchronously inject a test signal, and collecting multi-path response data, and establishing a multi-parameter complex equation set based on the Kirchhoff voltage law for solving, and finally judging the grounding resistance of the tower according to the order of magnitude relationship between the equivalent impedance and the grounding resistance. According to the invention, through the measurement method without wire releasing and auxiliary electrode bonding, the operation steps are simplified, the working efficiency is improved, personnel are prevented from working in a high-risk environment, and the working safety is improved; meanwhile, the portable design provides effective support for data real-time monitoring, online analysis and operation and maintenance decision on the basis of guaranteeing functionality, and the accuracy, efficiency and safety of power transmission line grounding resistance measurement are comprehensively optimized.