414results about How to "Guarantee production safety" patented technology

The invention discloses a tunnel heading-along earthquake advanced detection device taking a heading machine as an earthquake focus and a method thereof. The device comprises an earthquake detector, an earthquake focus signal receiving sensor and an earthquake wave receiving detector array, wherein the earthquake focus signal receiving sensor is arranged on the arm of the heading machine; and the earthquake wave receiving detector array is arranged on a tunnel wall. The method comprises the following steps of: continuously acquiring earthquake wave signals through a three-component sensor which is coupled on the arm of the heading machine and a three-component sensor array which is arranged on tunnel surrounding rock by taking vibration generated by cutting rock with a cutting head during working of the heading machine as a hypocenter; and recording the acquired signals for processing, and forecasting the position and structural detail of a geological anomalous body in front of a tunnel by analyzing received wave field imaging geometrical characteristics. Due to the adoption of the device and the method, the problem of oneness of an earthquake wave field of a pure explosive source in near flat ground layer tunnel advanced detection can be solved without influencing the tunnel heading work; the device has high working efficiency and high detection accuracy, and is free from safety risks; and accurate positioning of a geometrical anomalous body can be realized.

The invention relates to wind pressure air drilling equipment in a downhole soft outbursting coal bed and a process matched therewith. At present, as the consequent layer drilling characterized by high construction speed, low cost and high gas extraction efficiency becomes the primary option for coal control and gas control in coal mines, for soft outbursting coal beds, the gas extraction efficiency is directly dependant upon the pore-forming rate of the consequent layer drilling. The equipment comprises a boring machine, an air compressor, an orifice dust collection and dust removal device, a high-strength large through-hole drill rod, a drill bit with an inner core which can automatically fall off, and an antistatic explosion-protection PVC sieve tube; the boring machine which has large power and large torque supplies power to drilling construction; the orifice dust collection and dust removal device collects and eliminates slack carried out by wind from the orifice during drilling; and the antistatic explosion-protection PVC sieve tube is transferred from the interior of the high-strength large through-hole drill rod to the bottom of the orifice without lifting a drill on the completion of drilling, and at last remains in the orifice, thereby ensuring the completeness of drilling. The equipment and the process matched therewith provided by the invention has the advantages of increasing the pore-forming rate of the consequent layer drilling in soft outbursting coal beds, improving the effect of gas extraction, improving the working atmosphere of downhole air drilling, and protecting the production safety of outbursting coal mines.

The invention discloses aqueous chromium-free zinc and aluminum coating. The coating comprises an agent A and an agent B, which are mixed and blended uniformly when the coating is used, wherein based on the total weight, which is 100 percent, of the agent A and the agent B, the agent A comprises 1 to 5 weight percent of emulsifier, 10 to 25 weight percent of ethanol, 0 to 5 weight percent of deforming agent, 0 to 0.3 weight percent of thickener and 25 to 35 weight percent of metal zinc aluminum powder or zinc aluminum paste; and the agent B comprises 20 to 40 weight percent of deionized water, and 10 to 20 weight percent of silane coupling agent. The aqueous chromium-free zinc and aluminum coating does not contain hexavalent chromium, lead, mercury and cadmium heavy metal ion compounds or toxic organic solvents such as benzene and dimethylbenzene. The curing temperature of the coating is 250 to 300 DEG C, and the curing time of the coating is 20 minutes which is much shorter. The invention also provides the preparation method and the coating method of the aqueous chromium-free zinc and aluminum coating.

A design and control method for the optimizing control system of intermediate rolling mill and heating furnace in order to improve the heating quality of billet in the heating furnace and save energy features that the heating furnace and intermediate rolling mill constitute a closed loop system, the information (rolling force, temp, etc) is fed back to heating furnace for dynamically changing the heating temp, and the optimizing control strategy and control algorithm are used in the billet heating process.

The invention discloses a rail-mounted gantry crane automatic yard operation control system and an automatic loading and unloading method, and the control system and the automatic loading and unloading method can reduce investment for reconstruction and enables technological process to be simplified. The system comprises a rail-mounted gantry crane automatic controller, a rail-mounted gantry crane PLC controller, a hanger PLC controller, a container truck hoist-preventing device, a rail-mounted gantry crane positioning device, a container landing detection device, a hoisting box automatic control device, a target container positioning device and a hanger positioning device. The system refits a conventional rail-mounted gantry crane into an automatic rail-mounted gantry crane and can carry out container landing, locking, hanger rising, container dropping, unlocking, hanger rising and the like on containers through controlling by the automatic loading and unloading method, a cycle of operation can be automatically finished without intervention by a remote operator, so work efficiency is improved, labor cost is reduced and work cost is lowered down; moreover, equipment investment is small, and operation is simple and convenient.

The invention relates to an automatic feeding device which comprises a fixed bottom plate, a driving mechanism, a transmission mechanism and a swinging mechanism which cooperate mutually, wherein a vertical plate is arranged on the fixed bottom plate, and an upper slide rail and a lower slide rail are arranged on the vertical plate; the top of the vertical plate is provided with a left bearing guide block and a right bearing guide block, and the side surfaces of the left bearing guide block and the right bearing guide block are respectively provided with a guide rail; the driving mechanism comprises a servo motor controlled by a master control circuit, a driving gear arranged on the rotating shaft of the servo motor and a driven gear engaged with the driving gear; and the servo motor is arranged on the fixed bottom plate. In the invention, the driving mechanism, the transmission mechanism and the swinging mechanism cooperate mutually, and a simple and easy structure with low manufacturing cost is used for replacing an ordinary double-cylinder driving mechanical hand to realize the automatic feeding and assembling actions of products, so that the design cost of assembling equipmentis greatly reduced, and the device has higher practical value. The device also improves the working properties of equipment and enhances the precision while reducing the designing and manufacturing cost through reasonably utilizing sensing equipment so as to effectively guarantee the production safety and improve the production efficiency.

The invention discloses a mine environmental monitoring and rescue management system based on the UWB technology. Ethernet architecture is adopted for the system, each downhole positioning base station is provided with a positioning module and an environmental monitoring module, data of the positioning base station are uploaded to a ground monitoring center through Ethernet, and each positioning tag is provided with a positioning module and a life state monitoring module. The system effectively integrates environmental monitoring, positioning and life detection, comprehensive rescue information can be provided for making a rescue scheme, and the rescue efficiency is improved.

The invention discloses a reagent, detection method and application for the detection of African hog cholera virus. The reagent comprises a specific primer pair and a probe, upstream and downstream primers of the primer pair are respectively sequences shown in Seq ID No. 1 and 2, and the probe is a sequence shown in Seq ID No. 3 or its reverse complement sequence; in the probe sequence shown in the SEQ ID No.3, a 28th base modifies fluorescent quenching group-dT, a 31st base is replaced with a base analog, a 33rd base modifies a fluorescent group-dT, and a 3' end modifies C3 Spacer. The reagent is sensitive, specific and efficient for detection of the African hog cholera virus by recombinase polymerase amplification; compared with conventional conventional or real-time fluorescent PCR, thereagent and the detection method have short detection time and simple operation, are especially suitable for on-site testing, and are of great significance for the rapid prevention and control of theAfrican hog cholera virus and guarantee of production safety.

The invention provides a drilling water soluble salt mine mining subsidence InSAR prediction method, which comprises the following steps: inverting the surface time sequence settlement of a salt minearea by using a time sequence InSAR technology, and obtaining a radar line-of-sight direction time sequence deformation quantity; extracting reliable deformation sample points near the drilling layoutposition; constructing a traditional static probability integral method model; calculating the settling volume of the high-coherence point in the vertical direction; utilizing unknown parameters of agenetic algorithm estimation model to construct a Weibull time function dynamic probability integral model, substituting all parameter result values obtained through calculation into the Weibull timefunction dynamic probability integral model, the settlement amount of all point positions at any time is calculated, and predicting a mining area time sequence deformation field. The defect that a traditional probability integral method model is mostly applied to a coal mine area and limited to a static sinking basin to mine subsidence prediction is overcome, the application space of the InSAR technology in mining area subsidence prediction is widened, and the ecological environment and production safety of the drilling water soluble rock salt mine are guaranteed.

The invention relates to oil, especially to an emulsified oil which is suitable for being added into livestock feed and a preparation method thereof. The emulsified oil comprises the following components of: by weight, 40-100 parts of vegetable oil, 0.5-5 parts of span, 1-10 parts of monoglyceride stearate, 1-5 parts of sodium caseinate, 1-10 parts of disodium hydrogen phosphate and 30-90 parts of glucose syrup. The emulsified oil is prepared by technological processes of burdening, homogenization, spray drying and cooling. The emulsified oil provided by the invention has balanced nutrient proportion, is rich in medium / short chain aliphatic acid, high nutritional milk protein, digestible monosaccharide and the like which are all easy for animals to absorb, has high net energy value and high digestion and absorption rate, can greatly increase the content of fat in feed and raise energy density of animal diets, is a powered solid, and is convenient to preserve and transport.

The present invention discloses a device for automatically testing a web page, including the following components: a testing and processing apparatus to test and process a web page; a data storage apparatus used to store information of tested web pages, tested cases and data of test results; a testing tool to browse web pages, parse contents, control execution processes and to obtain error information; wherein the data storage apparatus and the testing tool are both connected with the testing and processing apparatus, and the testing tool is connected with the detected web system. The invention also discloses a method for automatically testing a web page. With the invention, the testing efficiency of web pages is greatly enhanced through parsing input domain objects of web pages and employing a testing method based on objects of web pages, and the invention will effectively improve software quality, guarantee stability and security of enterprise production.

The invention discloses a control method of unattended operation for a coal mine comprehensive mechanized mining face. The control method is realized on the basis of a centralized control function of an end head controller, a double RS 485 bus communication mode is adopted by the end head controller, one bus is used for polling a working condition parameter of a working face hydraulic support and sending the working condition parameter to a central explosion proof computer; the other bus is used for carrying out centralized-control, determining a running position of a coal cutter through polling the state parameter of the hydraulic support, sending a control command to an inter-frame controller through the buses, controlling the movement of the hydraulic support and matching the marching coal cutter to carry out automated operation, the end head controller forms a bent section through a control support push sliding, so as to assist the coal cutter to realize the technology of beveling, cutting feed and triangular coal slicing. According to the control method of the unattended operation for the coal mine mechanized mining face, the unattended operation automatic production of the working face is realized, the degree of automation is high, the communication is stable and reliable, the mining efficiency is improved, the safety production is guaranteed, the labor intensity is reduced and the range of application is wide.

The invention provides a lithium-supplement negative electrode plate and a fabrication method thereof. The lithium-supplement negative electrode plate comprises a pole plate and a lithium-supplement coating layer, wherein the lithium-supplement coating layer is coated at an outer side of the pole plate and comprises metal lithium powder and ceramic powder and / or inorganic salt powder. The preparation method comprises the steps of mixing the metal lithium powder and the ceramic powder and / or the inorganic salt powder to obtain mixed powder under a protection atmosphere, mixing the mixed powder,a binding agent and an organic solvent to obtain paste, and coating the paste onto a surface of a negative electrode plate to obtain the lithium-supplement negative electrode plate. The lithium supplement method is high-efficiency and low in equipment requirement and is simple to operate, and lithium supplement quantity can be accurately controlled.

The invention discloses an abnormal alarm data detection method based on a multivariate time series. The abnormal alarm data detection method based on the multivariate time series comprises the steps that data of multiple correlated variables are extracted from historical data, the multivariate time series is established and standardized, and the symbol direction between the variables in the normal state is calculated; time series segmentation description based on key turning points is determined, the minimum time interval is set, and key turning point searching is conducted; the piecewise linearity of the multivariate time series is represented, a fitting error is determined according to the orthorhombic distance between a data point and each segment, a loss function threshold value is set, the number of the segments is optimized, and an optimized segmentation result is obtained; and based on the optimized segmentation result, correlation analysis is conducted on all the segments of the multivariate time series, the symbol direction between the segment variables is extracted, and abnormal data with the symbol direction inconsistent with the symbol direction in the normal state are detected. By adoption of the abnormal alarm data detection method based on the multivariate time series, favorable conditions are provided for designing of a dynamic alarm threshold value of a multivariable alarm system, and thus disturbance alarms are reduced.

The invention relates to a drilling and exploiting technology, in particular to a method for exploiting coal bed gas, and aims to solve the problem that stable yield and high yield of coal bed gas cannot be realized by using the conventional coal bed gas exploiting technology. The method for exploiting coal bed gas comprises the following steps: a, drilling a vertical well from the ground to the bottom of a coal bed, drilling a plurality of horizontal holes in a plurality of layers by taking the inner wall of the vertical well in the thickness of the coal bed as a starting point, wherein all the horizontal holes distributed in the plurality of layers are formed radially by taking the vertical well as the center after being staggered in an axial space; the vertical well and the horizontal holes are fully filled with water; b, crack making: putting a combustion device filled with a solid propellant into the vertical well, generating a large amount of high-temperature and high-pressure gas by using rapid combustion of the solid propellant, transmitting pressure and impacting the coal bed through water, and forming three-dimensional netlike irregular cracks on the coal bed; c, injecting a chlorine dioxide blocking remover into the horizontal holes; d, exploiting the coal bed gas from the well mouth of the vertical well on the ground. The method is reasonable in design, and the exploitation quantity of the coal bed gas is increased.

The invention provides a field apparatus inspection method and system. The method is characterized in that identification cards which are internally provided with an identification number respectively are arranged on the field apparatus regularly; inspectors can acquire the numbers of the identification cards and an apparatus name by swiping an information collector, and then the operating parameters of the field apparatus are input into the information collector through a keyboard; data collected by the information collector is received by a front-end inspection device; the data is sent to an inspection server through Ethernet; the inspection server analyzes and judges whether the identification cards are swiped regularly, the data is collected normally, and the regular collection is carried out and a statistical statement is produced according to the pre-stored information, and provides alarm information; and a terminal server accesses to the inspection server to acquire the statistical statement through a B / S architecture explorer.. The method and system has the advantages that the inspectors inspecting the field apparatus of an enterprise can be effectively supervised, the working quality of the inspectors can be quantitatively and qualitatively evaluated, the operating parameters of the inspection apparatus can be judged in real time, the informationzation management level of the enterprise is improved, and the production requirements of the enterprise are met.

The invention relates to a method for manufacturing a beveled ball valve, and relates to a process for manufacturing a ball valve. The method is characterized by comprising the following steps: 1, cutting out a round steel bar according to the specification of a valve body of the beveled ball valve; 2, manufacturing a blank of the valve body of the beveled ball valve; 3, lathing a middle way; 4, milling the upper edge and lower edge of the middle way; 5, milling a sealing surface of the middle way; and 6, drilling bolt holes. In the method for manufacturing the beveled ball valve, the beveledball valve is machined by a forging method through a lathe and a milling machine, and the valve body is high in density and has no air holes, is suitable to be used in pipelines with high pressure rating in industry, and guarantees personal safety and production safety.

The invention relates to the technical field of pipe production equipment and aims to provide automatic articulated joint assembling equipment which lowers the labor intensity and improves assembling efficiency. The automatic articulated joint assembling equipment comprises a machine frame, wherein the machine frame is provided with a rotary disc, manipulators and a material storage cylinder; the rotary disc is provided with a first workstation, a second workstation and a third workstation, and the manipulators correspondingly comprise a first manipulator, a second manipulator and a third manipulator; the material storage cylinder is arranged on one side of the third workstation; a main body is filled in the workstation by the first manipulator; the second manipulator presses a fixing side into the main body in the second workstation; a sealing ring is automatically pressed in the material storage cylinder; the hird manipulator presses the sealing ring into a screw side and screws the screw side into the main body in the third workstation. The automatic articulated joint assembling equipment can achieve automatic assembling of articulated joints, lowers labor intensity, saves time and labor, reduces labor cost, and ensures production safety, is simple and convenient to operate and improves assembling efficiency. The invention further provides an automatic articulated joint assembling method.

The invention relates to a rice seed dressing agent composition used for preventing and treating black-streaked dwarf disease and its preparation method. The composition is prepared from effective components, a microelement fertilizer regulator, a solvent, a carrier, a surfactant, and other additives, and can be prepared into suspending agents, water dispersible granules or wettable powder. The effective components include an insecticide and an antiviral agent. The composition can improve seed germination rate, ensure whole, strong and neat seedlings, and can promote growth and development ofthe seedlings and increase crop yield. The rice seeds that undergo seed dressing treatment can substantially improve the autoimmune system of crops, and can consciously resist disease attack. When effected by the agent, pests can take migratory flight or stop causing harm. The rice seed dressing agent composition of the invention especially have obvious antifeeding and repelling effects on Sogatella furcifera, Nilaparvata lugens, Oulema oryzae, Stenchaetothrips biformis, naranga aenescens moore and other pests of rice, reduce harm and virus spread, decrease or alleviate the occurrence of riceblack-streaked dwarf disease, thus having very obvious social and ecological benefits.

The invention relates to a forecasting and early warning system and method for mine pressure of an underground working face of a coal mine, and belongs to the field of coal mining. The forecasting andearly warning system mainly comprises a monitoring module and a forecasting and early warning module. The forecasting and early warning method comprises the steps that based on the calculating formula and the statistic law of the theory related to mine pressure, relevant information of the working face at different periods is collected and processed, the mine pressure strength of the working faceis prejudged, the position and the strength of each time of weighting are forecasted, before-mining pressure early warning before mining of the working face is achieved, and long-time early warning and real-time early warning in the mining process of the working face are achieved; and meanwhile, corresponding prevention and control measures of a high mine pressure disaster are given based on dataof large database in the background. According to the forecasting and early warning system for the mine pressure of the underground working face of the coal mine, all-time forecasting of the positionand the strength of weighting of the comprehensive mechanized working face and weighting dynamic early warning are achieved, guiding significance for support selection and prevention and control andtreatment of the high mine pressure disaster is provided, and safe and efficient exploiting of the working face is ensured.

The invention relates to a method for synthesizing Varenicline intermediate 2, 3, 4, 5-tetralin-1, 5-methylene-hydrogen-benzoazepine. The method includes the following steps: under the action of catalyst, mixing amyl nitrite with o-aminobenzoic acid solution to generate diazonium salt, then mixing the diazonium salt with cyclopentadiene, and heating to react to generate compound 1; feeding ozone into the solution of compound 1, after complete conversion, adding reducing agent to generate compound 2, then dripping the compound 2 to the mixed solution of triacetoxy sodium borohydride and benzylamine to generate compound 3 by loop closing; and hydrogenating the compound 3 under the action of palladium and carbon for debenzylation and reduction to obtain M intermediate 2, 3, 4, 5-tetralin-1, 5-methylene-hydrogen-benzoazepine. The method has the advantages of greatly simplifying the method for preparing Varenicline intermediate, being simple in production process and safe in operation, well ensuring no harm to the environment and control on production cost, increasing yield and being capable of becoming a process in great industrial production.

The invention discloses wet type grinding equipment for an automatic robot. The wet type grinding equipment for the automatic robot comprises a grinding machine table body, a robot base, a robot body, a grinding head fixing mechanism, a grinding fixing fixture, an automatic feeding mechanism, an abrasive paper loading mechanism, an automatic abrasive paper tearing mechanism, an automatic water spraying mechanism, a human-computer interface and a three-colour audible and visual alarm; the robot base is tightly pressed against the rear side of the grinding machine table body; the robot body is placed on the robot base; the grinding head fixing mechanism is mounted at the working end part of the robot body; a machine table is arranged at the lower part of the grinding machine table body; a machine case is arranged at the upper part of the grinding machine table body; the grinding fixing fixture is arranged in the central position of the machine table; the automatic feeding mechanism and the automatic abrasive paper tearing mechanism are arranged on one side of the grinding fixing fixture; the abrasive paper loading mechanism is arranged above the automatic abrasive paper tearing mechanism; the automatic water spraying mechanism is arranged on the rear side of the grinding fixing fixture; the human-computer interface is mounted on the outer wall of the front side of the machine chassis; the three-colour audible and visual alarm is mounted at the top of the machine case. The equipment can protect the environment, and can improve the production efficiency.

The invention relates to multi-axis rotating production equipment used for part assembling of a reduction gear. The multi-axis rotating production equipment comprises a working bench, a hydraulic turnover mechanism, a hydraulic rotating mechanism, a hydraulic station and a hydraulic hooking pin assembly which are connected, wherein the working bench surface of the working bench is connected with a slewing bearing of the hydraulic turnover mechanism, the hydraulic turnover mechanism can enable a turnover bench surface to be connected with a slewing bearing of the hydraulic rotating mechanism through pin hole positioning and bolted connection, the hydraulic turnover mechanism can enable a turnover bench surface to be connected with a rotary joint in the hydraulic rotating mechanism through the bolted connection and enable the rotary joint to be positioned on the lower surface of the turnover bench surface, the hydraulic rotating mechanism can enable a pin cylinder installation base and a pin slot to be connected with the turnover bench surface in the hydraulic turnover mechanism through the bolted connection and enable the pin cylinder installation base and the pin slot to be positioned on the upper surface of the turnover bench surface, and the hydraulic hooking pin assembly can enable a hooking pin base to be connected with the working bench surface of the working bench through the bolted connection and enable the hooking pin base to be vertically positioned on the upper surface of the working bench surface. The multi-axis rotating production equipment has the advantages of reasonability in structural design, simplicity in processing, safety and reliability in performance, energy conservation and high efficiency.

The invention discloses an abnormity warning and processing system of a continuously-producing process, which can effectively conduct abnormity warning and processing timely without stopping producing, and is in favor of the continuous and stable operation of the producing process. Each process parameter during the producing process is monitored in a real-time manner, and the abnormity accidents and processing measures are stored in a historical database, and the situations of record failure, illegal processing and information withholding can be prevented. The abnormity accidents are classified, and for high-level abnormity accidents that the safety of the producing system will be affected if the vehicle is not stopped, the stopping instruction is immediately triggered, so that the producing safety can be ensured. As for general abnormity accidents which can be resolved by an executive agency, the executive agency can resolve the accidents by itself, and thereby the processing speed ofthe abnormity accidents can be accelerated, and continuous producing can be guaranteed. As for abnormity accidents which cannot be resolved by an executive agency, technical decision will be made bythe technical department so as to ensure production continuity.

The application discloses a reagent for detection of animal influenza virus type A, a detection method and an application thereof. The reagent includes a primer pair and a probe used for recombinase polymerase amplification of the animal influenza virus type A, wherein a forward primer of the primer pair is represented as the SEQ ID No.1, a reverse primer of the primer pair is represented as the SEQ ID No.2, and the probe is represented as the SEQ ID No.3; the 29th basic group in the probe is marked by a FAM group, the 31st basic group is replaced by dSpacer, the 34th basic group is marked by a BHQ1 group, and a 3' terminal is modified by C3Spacer. The reagent provides a novel detection scheme and approach for the detection of animal influenza virus type A. The animal influenza virus type A RPA detection method based on the reagent is quick and accurate, is low in demand on hardware equipment, is suitable for on-site quick detection and is especially suitable for departments such as animal quarantine and the like.

The invention discloses a real-time hot steel blank spray machine set based on PLC, which comprises a spray main machine and an electric controller. Wherein, the spray main machine has a slide frame, on which the traverse vehicle, the displacement sensor, the transverse displace cylinder, and the transverse displace controller are arranged; the transverse vehicle has a longitudinal vehicle, and a big inlet cylinder; the longitudinal vehicle has a sprayer element, and a small inlet cylinder; the spray main machine has a coating material feeding system; the electric controller uses the PLC control system which is connected to the industry control computer, the on-place detector, the electromagnetic valve condition detecting module, the transverse displacement controller, the feeding belt control switch, and the electromagnetic valve. The invention via improving the mechanical structure of sprayer, and using PCL control system, realizes the full-automatic, accuracy and online real-time multiple digit continuous mark in high temperature, to confirm the sharpness of mark, and apply the long time operation of spray machine set in bad condition. The invention can improve the automatic level and the quality management level of steel blank.

The invention discloses a three-dimensional roof controlling method for fully mechanized caving of a steeply inclined and extremely thick coal seam. The steeply inclined and extremely thick coal seam is mined in multiple sections from back to front along the trend of the coal same, each of the mining sections is cut into multiple sub-layers from top to bottom, and the uppermost sub-layer is a top sub-layer; when any mining section is mined, the multiple sub-layers of the mining section are respectively minted from top to bottom, and the process comprises the following steps: I, mining the top sub-layer: comprising the steps of tunnel construction, extraction of toxic and harmful gas in a pre-denotation roadway, advanced pre-blasting of top coal, drainage to wet the top coal, coal mining and nitrogen injection behind a working face and ground backfill of a subsidence area; II, mining the next sub-layer; and III, repeating the step II once or multiple times till the mining processes of all sub-layers of the mining section are completed. The method disclosed by the invention is simple in step, reasonable in design, convenient to implement and good in using effect, and various protective measures are combined in use, so that the potential safety hazards such as roof caving, gob fire and the like can be effectively eliminated.

The invention discloses a reagent and a detection method for detecting porcine circovirus type 2 and an application. The reagent for detecting the porcine circovirus type consists of a primer pair for conducting amplification detection on recombinant polymerase of the porcine circovirus type 2 and a probe, wherein the sequence of a forward primer of the primer pair is shown as Seq ID No.1, the sequence of a reverse primer of the primer pair is shown as Seq ID No.2 and the sequence of the probe is shown as Seq ID No.3; the 31st base of the probe is marked by BHQ1, the 33rd base is substituted by tetrahydrofuran, the 35th base is marked by FAM and the 3' terminal of the probe is modified by a phosphate group. According to the reagent for detecting the porcine circovirus type 2, a novel detecting scheme and a novel detecting approach are provided for the detection of the porcine circovirus type 2. The porcine circovirus type 2 RPA detection method based on the reagent provided by the invention is rapid and accurate, and low in requirement on hardware equipment; and the method is applicable to on-site rapid detection and is especially suitable for such departments as inspection and quarantine and the like.

The invention discloses a fault detection method, device and system for a communication line. The method comprises the steps: adopting a target test mode to test a communication line, and obtaining atest result, wherein the target test mode comprises at least one of roll call test, period test, optical power test, fault trigger test and external equipment alarm linkage test; determining fault positioning information in the test result; and determining corresponding early warning information based on the fault positioning information. The technical problems that in the prior art, faults of a communication line cannot be accurately and effectively detected, and production safety and stable operation of a power system are affected are solved.

The invention relates to the field of mariculture, in particular to an unattended multifunctional underwater robot for a deep sea net cage. The robot comprises a robot body, a brush type net cage cleaning system, a dead fish collecting system and a net cage broken hole repairing system; the robot body comprises a robot body shell, a vision system, a robot movement system and a control system; andthe vision system, the robot movement system, the control system and the net cage broken hole repairing system are all arranged on the robot body shell. The robot is used for maintenance and broken hole repair of deep sea net cages, cleaning attachments on the net cages, monitoring the growth state and living environment of cultured organisms in the net cages, and catching and cleaning diseased and dead cultured organisms in the net cages.