102results about How to "Monitoring data is reliable" patented technology

The invention relates to an angle-variable subzero-temperature direct shear apparatus for rock and a test operation method, belonging to the technical field of equipment for rock mechanics testing. The angle-variable subzero-temperature direct shear apparatus comprises a host framework, a vertical loading mechanism, a vertical load support mechanism, a horizontal loading mechanism, a horizontal load support mechanism, a shearing box, a temperature control system, a measurement and control system and a computer system. The shearing box is arranged in an insulation can of the temperature-control system and realizes a subzero-temperature testing environment; the shearing box comprises a shearing box body, an arc slide rail, a rotating member, a wing-shaped fixture block, a semi-circular guide groove plate, a middle separator plate, a swivel positioning mechanism, and front and back end caps; and the shape of the shearing box is maintained unchanged while the internal structure of the shearing box changes from time to time through simple operation, so the purpose of shearing rock samples with different-angle cracks is achieved. The direct shear apparatus for rock and the test operation method can effectively overcome problems in subzero-temperature and angle-variable shearing; and the direct shear apparatus is simple in the principles of the overall structure, convenient to operate, high in visualization degree, changeable in functions and good in applicability.

The invention discloses a humanized sleep monitoring alarm clock and a control method thereof. The humanized sleep monitoring alarm clock comprises piezoelectric sensors, an acquisition circuit, an analog-digital converter, a processor, an awakening device and a timer. Sleeping stages are judged according to eye movement frequency and combined with preset awakening time to enable the awakening device to be controlled to start at a light sleep stage. A user is awakened at the light sleep stage by the humanized sleep monitoring alarm clock according to the sleeping stages of the user and the awakening time preset by the user, so that the user can get into a waking state more quickly on the premise that life arrangement of the user is not delayed, and sleep efficiency can be improved within limited sleep time. The humanized sleep monitoring alarm clock is simple and can be integrated on a blinder to be worn by the user during sleeping, and normal sleeping of the user is unaffected. The piezoelectric sensors of the blinder integrated 'humanized' clock are arranged in the blinder and closely attachable to a human body, and continuity and accuracy in timing of the clock are guaranteed.

The invention discloses a novel SERS substrate-based method for quantitatively testing pathogenic bacteria, and belongs to the technical field of biological detection. Silicon dioxide treated by an immunospectral marker is coated with gold nanoparticles for quantitative test of the pathogenic bacteria. Raman spectra signal monitoring data are more stable and reliable and can be greatly repeated. The method is good in test stability, high in sensitivity, high in specificity, the detection process is simple, fast, accurate and quantitative, and a wide detection interval and a low detection limit are obtained. The method is simple in operation, an SERS immune signal probe and a capture probe can be prepared in advance, the capture probe and the signal probe only need to be sequentially added to a to-be-detected sample for reaction during operation and the test is carried out at once through magnetic separation after the reaction is completed: the collection time is 30s, and then the concentration is immediately read from a standard curve, thereby achieving fast quantitatively testing. The method can meet the requirements of food safety and environment monitoring departments, and has wide practicability.

The invention provides an underground construction surrounding rock disaster whole time interval induced polarization monitoring method, and belongs to the technical field of mining industry and geotechnical engineering security detection and monitoring. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method relates to a power supply electrode (1), a measuring electrode (2), a digital direct current induced polarization instrument (3), a main control computer (4) and an acousto-optic warning device (5). The power supply electrode (1) and the measuring electrode (2) are respectively connected with the digital direct current induced polarization instrument (3) through connecting wires, the digital direct current induced polarization instrument (3) is mutually communicated with the main control computer (4), the main control computer (4) is communicated with the acousto-optic warning device (5), the power supply electrode (1) and the measuring electrode (2) are arranged in an underground construction roadway or a tunnel surrounding rock monitoring region, and the digital direct current induced polarization instrument (3) and the main control computer (4) record and analyze monitored polarizability of the underground construction roadway or a tunnel surrounding rock in interval time periods in real time. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method has the advantages of being large in monitoring range, high in safety, damage-free, real-time and reliable in monitored data, and capable of early warning in a grading mode.

Disclosed are a graphical data quality evaluation device and method based on a big data technology. The device comprises a data acquisition device, an equipment monitoring device, a distributed memory, a spark memory calculation engine, a calculation unit, a data quality checking unit and a data preprocessing unit, wherein the data acquisition device is connected with the equipment monitoring device connected with the distributed memory, the distributed memory is connected with the data preprocessing unit, the data preprocessing unit comprises the spark memory calculation engine, the calculation unit and the data quality checking unit, mass heterogeneous data can be processed rapidly, efficiently and in time, and at the same time, the safe, stable and efficient operation of the device is ensured.

The invention discloses a distributed optical fiber monitoring system for tunnel surrounding rock deformation and construction and monitoring methods thereof. The monitoring system is composed of a first sensor, a second sensor, and an information system. The first sensor and the second sensor can be connected in series and then connected with the host interface of the information system to form a closed loop. According to the construction method, sensing fibers are symmetrically arranged in four grooves in the outer wall of a hollow circular pipe to form vertical and horizontal sensing loops, and sensors are embedded into pre-excavated trenches in the surrounding rock of a tunnel. According to the monitoring method, the vertical displacement distribution of the sensors can be calculated by performing differential and integral operations on the strain of the two fibers in the symmetrical first and second grooves of the hollow circular pipe. Distributed monitoring and real-time and advance monitoring are adopted. The data is stable and reliable. The cost is low. The monitoring system is suitable for dynamic real-time monitoring of the vertical and horizontal deformation of the surrounding rocks of existing highways under tunnels, tunnels, office buildings and other structures, and in influence areas of buildings.

The invention relates to an aerosol moisture removal device. The device is characterized by comprising a condenser, a congealer and a wriggle pump, and a circulating loop is formed by a plurality of pipelines; the condenser comprises a sampling gas transport tube which is arranged vertically, a condensation tube is cased outside the sampling gas transport tube, a ring-shaped clearance is left between the sampling gas transport tube and the condensation tube; the upper and lower linkers which seals the ring-shaped clearance are respectively arranged at the upper and lower ends of the condensation tube, and both are fixed as one body; one side of the upper and lower linkers is respectively provided with a water outlet pore and a water inlet pore in the axial direction; the outlet of the lower end of the transport tube is connected with one end of a double-directional linker, the other end of the double-directional linker is connected with the sampling gas heating part of the existing air particle automatic monitor; a sealed washer is arranged in the double-directional linker at the upper part of the heating part, and a condensed gas collection tube in interference fit with the sealed washer is vertically arranged in the double-directional linker; and a condensed water discharging outlet is arranged in radical direction at the side of the double-directional linker over the sealer washer. The aerosol moisture removal device is applicable to research in laboratories and environmental protection automatic monitoring stations all over China.

The invention discloses a power transformer state monitoring data cleaning method, comprising the following steps: establishing a stack noise reduction auto-encoder for monitoring data of gas in oil of the oil-immersed power transformer; performing stacking and fine adjustment processing after training each auto-encoder in the stack noise reduction auto-encoders one by one, so as to obtain a finalstack noise reduction auto-encoder data cleaning model; and finally inputting monitoring data of gas in oil of the oil-immersed power transformer into the stack noise reduction auto-encoder data cleaning model for processing to achieve the purpose of reducing noise of original data. According to the power transformer state monitoring data cleaning method, a data cleaning model is established on the theoretical basis of a stack noise reduction auto-encoder; compared with a traditional data cleaning mode based on a statistical method, the power transformer state monitoring data cleaning methodgets rid of constraints of data indexed evaluation standards from data essential characteristics, can well eliminate data noise, and provides reliable monitoring data for equipment state evaluation, equipment service life prediction and other work.

The invention discloses a non-contact throwing device for a GNSS monitoring terminal of a high-risk deformable body. The device comprises a multi-rotor flying platform; the multi-rotor flying platformis electrically connected with a power supply module; the multi-rotor flying platform is further connected with a three-axis photographing holder, a distance sensor, a load pod hanging buckle, an airborne RTK differential module, an aircraft communication radio station and a self-pilot module. The three-axis photographing holder is connected with a real-time image transmission camera; the load pod hanging buckle is connected with a GNSS monitoring terminal all-in-one machine or an aerial photography sensor; and the aerial photography sensor, the three-axis photographing holder, the airborne RTK differential module, the aircraft communication radio station, the distance sensor and the load pod hanging buckle are electrically connected with a self-driving instrument module. According to theinvention, problems of high safety risk and long period of manually arranging the GNSS monitoring terminal on the site of the high-risk deformable body in the prior art are solved. The invention further discloses a high-risk deformable body GNSS monitoring terminal non-contact throwin g method.

The invention discloses a power transmission line online monitoring system adopting distributed power supply. The system includes a field monitoring terminal, a communication network and a control center. The field monitoring terminal is intended for real-time acquiring operation state of a power transmission line, transmitting the acquired operation state of the power transmission line to the control center through the communication network. The control center is intended for computing, analyzing and storing the received operation state of the power transmission line. The field monitoring terminal includes a field monitoring mainframe, a monitoring unit and a power supply unit. The field monitoring mainframe includes a data acquisition circuit, a micro-processor, a storage unit, a first wireless communication module, a second wireless communication module, a communication switch module and a power supply interface circuit. According to the invention, by monitoring the operation state of the power transmission line through the field monitoring terminal and transmitting the acquired operation state of the power transmission line to the control center through the communication network, the system realizes remote monitoring of the power transmission line, lowers labor intensity, and ensures safe operation of the power transmission line.

The invention relates to a bolt-based underground space surrounding rock disaster resistivity real-time monitoring method and belongs to the mining and geotechnical engineering safety detection and monitoring technical field. According to the method, an underground space surrounding rock disaster resistivity real-time monitoring device is set and includes a power supply electrode, a measuring electrode, an electrical prospecting apparatus, a bolt and a main control computer; the main control computer is connected with the electrical prospecting apparatus; the power supply electrode and the measuring electrode are connected with the electrical prospecting apparatus through conductors; and the power supply electrode and the measuring electrode are connected with the bolt at an underground space surrounding rock monitoring area. According to the bolt-based underground space surrounding rock disaster resistivity real-time monitoring method, the bolt is adopted as a conductor to monitor the resistivity of an anchorage zone and surrounding rock; and the stability of the surrounding rock and anchorage zone is monitored according to the change of the resistivity. The method has the advantages of no damage to the surrounding rock, high accuracy, wide application range and the like.

The invention provides an energy releasing and buffering real-time monitoring method for a disaster of surrounding rock in underground space and belongs to the technical field of safety detection and monitoring of mining and geotechnical engineering. The method is characterized by adopting a monitoring system and comprising the following steps: step 1, fixing anchor bolts (1); step 2, mounting a surrounding rock inducing and buffering mechanism; step 3, mounting a surrounding rock displacement acquisition device; step 4, monitoring displacement of the surrounding rock (7); step 5, executing step 6 if the displacement of the surrounding rock (7) exceeds a preset threshold or meets a precursor mode, and executing step 4 otherwise; step 6, executing step 7 if the surrounding rock (7) has the probability of a surrounding rock disaster, and executing step 9 otherwise; step 7, predicting the range of the surrounding rock disaster; step 8, releasing the early warning level of the surrounding rock disaster; step 9, performing alarming by a master control computer. With adoption of the method, energy releasing, buffering and displacement of the surrounding rock are monitored, and the probability of accidents is reduced.

The invention discloses a photovoltaic power monitoring system based on a cloud platform. The photovoltaic power monitoring system comprises a data acquisition and processing terminal, a cloud server terminal and a monitoring terminal, wherein the data acquisition and processing terminal is connected with the cloud server terminal; the cloud server terminal is connected with the monitoring terminal; the data acquisition and processing terminal comprises a photovoltaic power supply module, a temperature sensor, a wind speed sensor, a solar irradiance detection module, a voltage detection module, a current detection module, a data conditioning module, a data processing module, a DSP module and a data transmission module. According to the photovoltaic power monitoring system, various sensors for temperature, voltage, current, irradiance and the like are utilized to collect information of a power generation system site, various data of a photovoltaic power generation system can be synchronously measured in real time, the stored database information can provide a basis for future scientific research, and a foundation is laid for improvement and enhancement of the photovoltaic power generation technology.

The invention relates to an online monitoring device for grounding current of a transformer core. The online monitoring device comprises a monitoring device body and a straight-through current transformer. The monitoring device body comprises a totally closed electromagnetic interference preventing housing. The external surface of the totally closed electromagnetic interference preventing housing is provided with a liquid crystal display screen and a device state indicating lamp. The totally closed electromagnetic interference preventing housing is internally provided with a signal acquiring and processing module, a communication module and a display interface module. The signal acquiring and processing module comprises a signal conditioning module, a digital-to-analog conversion circuit and a microprocessor unit. The signal conditioning module comprises a signal conversion circuit, a filter circuit and a signal amplification circuit. According to the online monitoring device, the straight-through current transformer is utilized for acquiring a leakage current signal of a grounding line of the transformer core, and a plan that the totally closed electromagnetic interference preventing housing and the current transformer are separately arranged is utilized. The online monitoring device has advantages of accurate and reliable monitoring data, high outer interference resistance and high convenience in mounting and maintenance.

The invention discloses a bolt vibration signal correction method based on white noise statistical characteristics for correcting vibration signals detected by a bolt vibration detection unit arranged on a tested bolt. The method comprises a first step of carrying out empirical mode decomposition on the vibration signals in which empirical mode decomposition is carried out on the vibration signals detected by the bolt vibration detection unit, and n intrinsic mode function components and a trend term are acquired, a second step of carrying out effectiveness recognition on the intrinsic mode function components in which an intrinsic mode function component effectiveness recognition module is called, and according to a pre-built white noise approximate entropy distribution interval module, effectiveness recognition is carried out on the decomposed n intrinsic mode function components, and a third step of carrying out signal reconstruction in which all recognized effective intrinsic mode function components after empirical mode decomposition is carried out on the vibration signals are used for reconstructing the vibration signals. The method of the invention has the advantages that the step is simple, the design is reasonable, realization is convenient, the use effects are good, the bolt vibration signals can be effectively corrected, and the real vibration state of the bolt can be acquired.

The invention discloses a dynamic tomography system and method for a fully mechanized face near field coal rock under exploiting excitation of coal machine. The system comprises an array information synchronous acquisition device and a near-field coal rock tomography working station; the near-field coal rock tomography working station is connected to the array information synchronous acquisition device. The excitation source for vibration is a coal machine. The array information synchronous acquisition device comprises an exploiting position detection unit and two anchor rod vibration detection arrays that are uniformly arranged in a mining roadway. The system is simple in structure and reasonable in design. The system is also convenient to install and operate and is good in using effect. Taking a coal machine as an excitation source, the system makes good images. The invention further discloses a dynamic tomography method for a coal rock near a fully mechanized face under exploiting excitation of a coal machine; the method comprises following steps: 1) the anchor rod vibration detection units and the exploiting position detection units are deployed; 2) dynamic tomography for a coal rock near a fully mechanized face is done under an exploiting excitation of a coal machine. Such a method can be done with a few steps. Reasonably designed, the method can also be done very conveniently to provide dynamic chromatography imaging conveniently and quickly.

The invention relates to a portable cardioelectric field tester, which comprises a frame, internal power, internal testing circuit and controlling circuit, wherein the invention is characterized in that: one end of frame is rectangle; the end of rectangle has an exposed electrode; the surface of rectangle has display; another end of frame has several semi-circle whose center is at the right under position of vertical central axle of rectangle; the center of semi-circuit has testing button; the arc end of semi-circle has another exposed electrode; the side of frame has the combined button of control, display, and storage; and a power button. The invention can confirm the space formed by wrist, arm and body, to test at normal position, to obtain accurate data.

The present invention discloses a method for ultrasensitive detection of miRNA based on a dual amplification SERS signal system. The surface of 4-MBA-labeled gold nanoparticles is coated with a layerof polydopamine to form a SERS mark with a gold-PDA-silver satellite structure, the raman signal of the SERS mark is amplified greatly by unique localized surface plasmon resonance of gaps between gold and silver nanoparticles; at the same time, an enzymatic digestion circular reaction is combined with a magnetic capture mechanism to further amplify a SERS signal to achieve rapid and highly-sensitive quantitative detection of the miRNA. The method has the advantages of simple operation, good detection stability and high detection sensitivity; an incubation solution after the enzyme digestion circular reaction is sequentially added to functionalized magnetic nanoparticles for reaction, and then reacted with the SERS mark, and magnetic separation is performed just after the reaction is completed to achieve rapid and quantitative detection of the miRNA. The method can be applied to clinical diagnostic screening for early cancer.

The invention relates to a method for detecting chemical oxygen demand by using a solar power water-borne monitoring buoy, which mainly solves the problem that the conventional water-borne monitoring buoy cannot accurately measure the chemical oxygen demand. The method is applied to the solar power water-borne monitoring buoy, the water quality is measured by using an optical detector, a high pressure gas cylinder serves as a gas source, the gas source is controlled by adopting a controller and is reasonably and effectively turned on and off, high-pressure gas flow is generated, and a chemical oxygen demand detector is cleaned, so that the chemical oxygen demand is accurately measured, and the method can be applied to the field of water quality monitoring in rivers, lakes and the sea.

The invention relates to an intelligent power supply system with high-voltage photovoltaic charging modules, and the system comprises a plurality of cell panel square arrays, n high-voltage photovoltaic charging modules (1, 2, 3,...,n), a control module, a load management module, a cell management module, a storage battery, and a remote monitoring module. Direct currents of the cell panel square arrays are inputted into a bus, and are processed by the n high-voltage photovoltaic charging modules in parallel connection, and are outputted from the bus. The processed direct currents are respectively inputted into the load management system and the cell management system. The cell management system is connected with the storage battery, and the load management module is connected with a load. Meanwhile, the control module is connected with and controls the n high-voltage photovoltaic charging modules, the load management system and the battery management system, and transmits information to the remote monitoring module. Through the parallel high-voltage input, the efficiency of the system is improved, and the cable capacity is small. Meanwhile, the modules alternately enter a dormant state, thereby prolonging the service life of all modules. The system also achieves the dynamic charging and discharging management, load dynamic connection and battery overcharging and discharging protection through intelligent monitoring.

The invention provides an in-situ test method for a deeply-buried soft-rock tunnel. The in-situ test method comprises the first step of conducting sampling on an early-stage exploration tunnel to obtain distribution characteristics of in-situ stress fields, the second step of calculating and determining parameters of a simulation test tunnel, the third step of excavating and expanding a size effect transition section, the fourth step of calculating and determining positions of monitoring sections, the fifth step of arranging an observation branch tunnel and pre-burying monitoring instruments, the sixth step of excavating the simulation test tunnel, and the seventh step of conducting regular observation through the monitoring instruments. The invention further provides an in-situ test structure for the deeply-buried soft-rock tunnel. The in-situ test structure for the deeply-buried soft-rock tunnel is established according to the in-situ test method. The in-situ test structure comprises the simulation test tunnel, the early-stage exploration tunnel and the observation branch tunnel. By the adoption of the in-situ test method and structure, anisotropism and size effects of soft rock are truly represented, a large quantity of measured data and test information of the properties of surrounding rock can be obtained, the uncertain factors that deeply-buried soft rock are low in strength and prone to softening with water, and a high deeply-buried cave section is hard to form are avoided, the defects of existing monitoring methods and tests are effectively overcome, and a reliable data support is provided for analysis of stability of the tunnel.

The invention relates to the technical field of shield construction, in particular to a construction method for an earth pressure balance shield to pass through a large-diameter sewage main pipe underground, and is used for solving the problems of high construction difficulty, high risk and great casualties and economic loss easily caused by improper control when the shield passes through the large-diameter sewage main pipe underground in the prior art. The construction method comprises the following steps that 1, engineering investigation is carried out, an underwater color television and a geological radar are adopted; 2, the mutual influence of a tunnel and a sewage pipe is predicted, deformation analysis is carried out by adopting a stratum I structure model; 3, construction preparation before underneath pass is carried out, comprehensive statistical analysis is carried out by adopting a 60m experimental section; and 4, shield underneath pass tunneling is carried out, and stratum settlement is controlled through a clay shock method. According to the construction method for the earth pressure balance shield to pass through the large-diameter sewage main pipe underground, the construction difficulty and the corresponding risk can be effectively reduced through engineering investigation, prediction of the mutual influence of the tunnel and the sewage pipe, construction preparation before underneath pass and shield underneath pass tunneling, and therefore casualties and economic losses can be reduced.

The invention belongs to the technical field of hydropower station control, and particularly relates to a cascade hydropower station minimum discharge flow dynamic control method and system. The method comprises the following steps of 1, judging whether the original minimum discharge flow of a water reducing river reach between cascade power stations meets an optimal value interval or not; 2, monitoring and analyzing backwater of reservoir areas of different dam water levels of a reservoir, and determining corresponding incomplete connection river reach lengths of different water levels and control section flow or water levels of the river reach; 3, acquiring connection data and water resource utilization data of the water reducing river reach, and evaluating the control of the current minimum discharge flow according to the acquired data; and 4, re-determining the control section of the minimum discharge flow scheduling. On the basis of optimizing the control method, a more accurate and convenient minimum discharge flow monitoring mode of the hydropower station is provided through the change of control conditions, and the water energy utilization efficiency of the cascade power station is improved on the premise of ensuring the ecological environment of a river in real time.

The invention discloses a rock-soil frost heaving thawed collapse two-dimensional vector measuring method. A rock-soil frost heaving thawed collapse two-dimensional meter related in the rock-soil frost heaving thawed collapse two-dimensional vector measuring method solves deformation amount of frost heaving thawed collapse deformation in the normal direction and the tangential direction or vectors of the frost heaving thawed collapse deformation by monitoring the angle variable quantity and the displacement variable quantity, the frost heaving thawed collapse deformation amount in the tangent direction and the frost heaving thawed collapse deformation amount in the normal direction are synchronously monitored in a two-dimensional plane, the rock-soil frost heaving thawed collapse amount is determined, and the aim of monitoring the frost heaving thawed collapse deformation is achieved. The technical defect that in a traditional monitoring method, the one-dimensional vertical deformation amount or the one-dimensional normal deformation amount serves as the frost heaving thawed collapse amount is overcome, and meanwhile the temperature monitoring function is achieved. Reliable and accurate monitoring data can be provided for frost heaving thawed collapse deformation of channel slopes in severe cold areas and cold areas.

The invention relates to a method for detecting the pesticide residue quantity in radix ophiopogonis. The method comprises the following steps of (1) weighing radix ophiopogonis to be tested; performing treatment by using a QuEChERS pretreatment technology; preparing a first test product solution; (2) weighing a proper amount of ribonolactone and sorbitol; adding acetonitrile and water for dissolution; using the materials as an analysis protection agent; (3) measuring the first test product solution; blowing the solution to the near dry state by nitrogen; adding acetone for dissolution; addingthe analysis protection agent; performing uniform mixing; using the materials as a second test product solution; (4) weighing a pesticide reference product solution; respectively adding acetonitrileto prepare a first reference product solution; measuring and taking the first reference product solution; respectively adding acetone to prepare a second reference product solution; (5) using a testing method; (6) calculating the content of pesticide in the first test product solution and the second test product solution according to an outer standard method. The method has the characteristics ofhigh repeatability, high accuracy, low utilization cost and the like. The pesticide residue quantity in the radix ophiopogonis can be fast, effectively, simply and conveniently detected.

The invention discloses a ship lock miter gate and hoist health state real-time online monitoring system. The system comprises a stress-strain monitoring system, a flow-induced vibration monitoring system, a top pivot state monitoring system, a bottom pivot state monitoring system, a gate operation posture monitoring system, an opening and closing force monitoring system, a signal transmission system, a signal acquisition system, a monitoring system, an early warning system, a data system and a PC system. According to the invention, the system is scientific in principle , simple in structure,convenient to purchase adopted components, easy to operate during construction, capable of guaranteeing the monitoring effect and mastering the operation conditions of large metal structure equipmentsuch as a ship lock miter gate and a hoist in real time, and easy to widely popularize in metal structure engineering of domestic harbor and navigation channel engineering due to the fact that the overall construction cost is controllable.

The invention relates to a wireless sensing monitoring device for constructional engineering and a use method. The device comprises a collection device, a communication device, and a monitoring device; the collection device is connected with the monitoring device through the communication device; the amount of the collection device is one or more; the collection device comprises a controller, a microprocessor, a power supply device, an environment monitor, a display screen, a lifting device, a frame drum, an alarm device and a switch; the lifting device comprises a first hydraulic rod, a second hydraulic rod, a first hydraulic cylinder, a second hydraulic cylinder, a first hydraulic pump, a second hydraulic pump, an oil pipe and a oil tank; the use method is simple and convenient in operation, strong in practicability, safe and reliable. The real-time monitoring of the constructional engineering is realized, the monitoring data is accurate and reliable, the real-time monitoring on theenvironment at different height locations can be realized, the applicable range is wide, the use is convenient, and the flexibility is high; and meanwhile, the monitoring device has an automatic adjusting and processing function so as to guarantee the security of the building in the construction and use period.

The invention relates to a difference frequency anti-interference local discharge online monitoring device, belonging to the field of detection technique, and aiming at improving the reliability of local discharge online monitoring data. The invention comprises the technical scheme as follows: the monitoring device consists of an interference inhibiting circuit, a high-speed A / D converter, a CPU and a display; the input end of the interference inhibiting circuit is connected with a local discharge sensor; output signals are connected to the IN end of the high-speed A / D converter; the ends B1 to B12 of the high-speed A / D converter are connected with the ends D0 to D11 of the CPU; and the display is connected with a PORTO interface of the CPU. The invention can effectively inhibit interference signals in the local discharge signals, ensures that the monitoring data is accurate and reliable, provides strong support for maintenance of high-pressure power equipment and greatly improves themaintenance quality of power equipment.

The invention discloses a volatile organic compound online monitoring system, which comprises a VOCs (volatile organic compounds) monitoring subsystem and a data acquisition and processing subsystem,wherein the VOCs monitoring subsystem comprises a sampling preprocessing system and an electronic control unit, and the sampling preprocessing system comprises a sampling preprocessing unit and a VOCsanalyzer; the data acquisition and processing subsystem comprises a junction box, an industrial personal computer and a system, and the system comprises a data display unit, a data printing unit, a data storage unit, a data remote transmission unit, and an intranet; the data remote transmission unit and the intranet are electrically connected with an environment-friendly monitoring information platform. The invention relates to the technical field of volatile organic compound online monitoring. The pretreatment method complies with the US, EU and domestic fixed pollution source exhaust gas measurement standards. The method has high reliability and the system adopts a total heat method to ensure the accuracy and reliability of monitoring data. The instrument sampling response speed is fast, the automatic calibration function is provided, the whole calibration is supported, and people are not needed to be on duty.

The invention discloses a lightning current monitoring system for a low-voltage electric transmission line. The lightning current monitoring system comprises a lightning current signal conversion module, a lightning current signal processing circuit, a GPRS receiving and transmission unit and a lightning current parameter storage and display module. The lightning current signal conversion module comprises a magnetic core induction coil, a sampling resistor, a voltage divider and an amplitude limiting circuit, wherein the magnetic core induction coil, the sampling resistor, the voltage divider and the amplitude limiting circuit are sequentially connected. The lightning current signal processing circuit comprises an A / D conversion circuit, an FPGA sampling control module and a DSP central control module, wherein the A / D conversion circuit, the FPGA sampling control module and the DSP central control module are sequentially connected. The lightning current parameter storage and display module comprises a GPRS wireless receiving module and a terminal storage and display unit which are connected. The amplitude limiting circuit is connected with the A / D conversion circuit, the DSP central control module is connected with the GPRS receiving and transmission unit, and the GPRS receiving and transmission unit is in wireless communication with the GPRS wireless receiving module. The lightning current monitoring system is used for monitoring the lightning current, generated by a direct lightning or the electrostatic induction and the electromagnetic induction of the lightning, of the low-voltage electric transmission line.