385results about How to "Real-time online monitoring" patented technology

The invention provides a transformer substation remote monitoring system and method. All indexes of a transformer substation can be monitored online in real time, wherein the indexes include all monitoring data in a transformer, a breaker and an arrester; when a certain index of the transformer substation becomes abnormal, an alarm sound can be sent out in time, failure data and failure devices are displayed on a display screen of a monitoring module, workers are reminded, the data monitoring accuracy and timeliness are improved, and the data transmitting safety and reliability are improved. Meanwhile, the monitoring data of the transformer substation are analyzed and processed in real time at a remote monitoring center, failure reasons and failure sources are found, a maintenance reference scheme is generated, and maintainers of the transformer substation are guided to remove failures in time. In addition, the maintenance records of routing inspection personnel can be recorded, monitored and fed back in time, and the routing inspection personnel are reminded to complete conventional maintenance in time.

The invention discloses an experimental platform for a relation between a mining fully-mechanized support and surrounding rocks. The experimental platform is used for researching an interaction relation between a hydraulic support in a mining fully-mechanized operating surface and the surrounding rocks. The platform comprises a loading experimental platform, a two-column shielding hydraulic support, a hydraulic loading system, a signal acquisition system and a data processing system, wherein the loading experimental platform comprises two experimental platform box body vertical grooves and a carrying bearing beam which is connected between the two experimental platform box body vertical grooves and used for paving an experiment material; and strain gauges are respectively embedded in different layers of the experiment material and used for monitoring the stress change of an overburden layer in a mining process. The experimental platform can load the overburden layer for complementing a ground stress. The two-column shielding hydraulic support is arranged on the operating surface and can perform real-time and on-line monitoring on loads of a top plate in the propelling process of the operating surface. The two-column shielding hydraulic support can realize high-frequency acquisition of support pressure signals and can monitor and record impact loads.

An open natural gas leakage multiplex inspecting method and optical channel configuration, based on semiconductor laser absorbing spectrum method, relates to master case and open long optical channel system. The master case sets with electrical source socket, switch, fan, optical fiber linker and data transmission interface. The master case owns closed infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier,signal generator,data collection disposal and control module, light switch, light switch driving circuit and infrared detector and connects with the locale optics system by optical fiber. Open optical system relates to integral optics telescope and more component angle reflector array and the former owns import optical fiber coupling implement and output optical fiber coupling implement. It achieves the time-sharing inspect of more gas component and more multiplex based on optical fiber distributing configuration of the light switch technology.

The invention provides a monitoring method for the turning stability of a digital control machine tool, relating to the monitoring technical field. As the performance of a servo system is continuously improved, a response speed, the sensibility and the like of the servo system are also continuously improved, thus, states of the machine tool can be reflected on a current of a driving motor during a cutting process. In the invention, through various signal processing methods, a plurality of characteristic values of current signals are extracted, a characteristic status vector is established as an input of a mathematical model, and a cutting status of the machine tool is output through analysis and calculation of the mathematical model. As the invention has the characteristics that the current signal has high anti-interference performance and is easy to be acquired, assistant tools are fewer, and the like, compared with a plurality of existing monitoring methods, the invention has the advantages of simple and feasible operation, good monitoring effects and the like; thereby, the invention can more easily realize the online monitoring for the processing states, and can effectively guarantee the processing security and the product quality.

The present invention discloses a model predictive control-based home integrated energy intelligent optimization and management system. According to the technical scheme of the invention, the structural features of a home energy local area network and the operating characteristics of all devices are analyzed, and then an economic operation scheme for the optimal energy management of the system is constructed. The system comprises a data acquisition module, a prediction module, an energy management and optimization module, a real-time scheduling optimization module, and a control and communication terminal module. Based on the model predictive control method, the online rolling optimized solution is conducted according to the energy consumption requirements of a load within different time periods, the real-time price of energy, and the state information of distributed power generation equipment and energy storage equipment. Therefore, the optimum allocation of the energy, and the economic and safe operation of the system are realized. Based on the internet technology, a network service platform is set up. Through a handset app, the functions of on-line monitoring, remote control and the like are realized. In this way, a user can know the energy consumption condition of home energy and the operating states of all intelligent devices at any time, so that the remote monitoring is realized for the user. The system provides a novel economic energy management mode for the user.

The invention relates to an inter-curved surface layer extrusion pressure monitoring system based on an array-type ultrathin compliant force sensor, and belongs to the technical field of precise measurement. The system comprises an array-type sensor consisting of an array-type ultrathin compliant force sensing probe and a front end circuit; a reference source; a collection module; a computer comprising an interface card and a data processing unit; and a power supply module. The power supply module is connected with the sensor and the collection module. The reference source is connected with the array-type sensing probe through line multi-route electronic simulation switches. The front end circuit is connected between the array-type sensing probe and the collection module. The interface card is connected with the row and line multi-route electronic simulation switches, respectively. The invention has the characteristics of simple structure, high antijamming capability, high accuracy of measurement, and capability of on-line monitoring of data processing in real time. The invention can monitor the extrusion pressure between face layers on line in real time.

The invention relates to a non-covalently modified graphene field effect transistor-based tumor marker detection sensor and a production method thereof. The sensor comprises a silica substrate, a graphene channel and a reaction chamber. The production method comprises the following steps: making a metal electrode, carrying out wet transfer on graphene, making the graphene channel and a protection insulation layer of the graphene channel, and modifying the surface of graphene in a non-covalent mode. The sensor has the advantages of convenient making process, simple modification process, easy operation, and high sensitivity and good specificity in application; and the making method can also be used to make most of biosensors of capture probes with amino groups, and the sensor is used to detect target molecules.

The invention discloses a comprehensive evaluation method for wireless sensor network performance, relates to a least squares support vector regression (LSSVR)-based comprehensive evaluation method for wireless sensor network performance to comprehensively and reasonably evaluate running performance of small and medium-scale wireless sensor networks, and belongs to the technical field of wirelesssensors and network communication. The method is characterized by comprising the following four steps of: determining a network running performance index, determining an independent network running factor value by adopting a factor analysis method, establishing an LSSVR-based network performance comprehensive evaluation model, and performing LSSVR-based network performance comprehensive evaluation with low power consumption. The method solves the traditional problems of 'dimensionality curse' and 'over-learning' by skillfully using a kernel function, is quite suitable for the comprehensive evaluation of the small and medium-scale wireless sensor network performance with a plurality of indexes, assists an administrator in timely and accurately grasping the running condition and tendency ofthe WSN, and provides basis for network running evaluation and optimization.

An online monitoring device for the radial rotation accuracy of a main shaft is disclosed, wherein a monitoring ring is installed at the radial measuring position of the main shaft; three eddy-current displacement sensors are installed on the monitoring ring; the proximitors of the eddy-current displacement sensors are connected with the terminal board of a data acquisition board card; the data acquisition board card is connected to an industrial computer via a PCI (peripheral component interconnection) slot; when the main shaft is in a rotating state, the eddy-current displacement sensors convert the measured voltage signal to a standard voltage signal via the proximitors; the analog signal is converted to a digital signal via a signal conditioning circuit module and an A / D (analog / digital) conversion module on the data acquisition board card, and then the digital signal enters into the industrial computer; the radial displacement signal of the main shaft is obtained by signal acquisition and analysis software; the roundness error of the main shaft is separated out by applying a three-point error separation technology, thereby obtaining the rotation error of the main shaft; and finally the analysis result of the rotation accuracy of the main shaft is displayed. The online monitoring device for the radial rotation accuracy of a main shaft has the advantages of being high in accuracy and convenient in adjustment.

The invention provides an underground cable fault detection system and fault detection method thereof. The underground cable fault detection system comprises a cable fault ranging device, a cable pathdetection device, and a fault point detection device. The cable fault ranging device consists of a low-voltage pulse signal source, a high-voltage pulse signal source, and a high-speed receiving device to realize signal detection in a low-voltage pulse reflection method and a flashover method. The cable path detection device includes an alternating-current high-voltage signal source and an electromagnetic induction receiving device; the frequency and amplitude of the alternating-current high-voltage signal source are adjustable; the alternating-current high-voltage signal source excites a to-be-detected cable to generate an electromagnetic field; and the electromagnetic induction receiving device detects the electromagnetic field generated by the to-be-detected cable. The fault point detection device includes a high-voltage pulse signal source, a direct-current signal source, an alternating-current signal source, a step-voltage receiving device, an electromagnetic induction receivingdevice, and an acousto-magnetic synchronous receiving device. The underground cable fault detection system can be applied to detection of underground cable open-circuit, short-circuit, grounding, low-resistance, high-resistance flashover and high-resistance leakage faults to obtain an accurate fault point.

Provided are an integrated sports monitoring system and a method thereof. Sports posture data of athletes' multiple parts such as footsteps, legs and arms, and human body load data are automatically collected and recorded in real time in the athletes' training or game process, and information such as athletes' motion tracks, heart rate changes, fatigue, sensitivity, load, physical status is displayed in real time. A system device includes an athlete monitoring device, a special wireless communication base station, a monitoring handheld terminal, a special analysis terminal, a data cloud systemserver, a data analysis terminal, a coach terminal, an online real-time monitoring terminal and an athlete terminal. The integrated sports monitoring system has the advantages that a sensor technology, a cloud computing technology, a data mining technology and a wireless communication technology and the like are adopted to perform multi-dimensional real-time online monitoring and comprehensive analysis on information such as athletes' motion postures, sensitivity, load, physical conditions and heart rate, and provide scientific reference for sports training or teaching.

The present invention relates to a safe operation and prevention control technique of an active distribution network, wherein preventive control is performed through optimizing a network structure for satisfying a safe margin requirement in operation of the distribution network, thereby effectively improving operation reliability of the distribution network; and simultaneously operation and short-term planning of the distribution network are guided for realizing higher economic benefit and social benefit. For this purpose, the technical solution adopted in the active reconfiguration strategy of the invention is characterized in that the active reconfiguration strategy of the distribution network and the preventing control method comprise the steps of: firstly, establishing a maximal power supply capability evaluating index which is adapted for the active distribution network; when the maximal power supply capability index of the distribution network is lower than a system safe guard line, performing active reconfiguration of the distribution network for achieving multiple targets of improving the maximal power supply capability index and minimizing number of times of operating a network reconfiguration switch; and if the maximal power supply capability index of the distribution network in the current operation manner is lower than a preset safe guard line, starting an active reconfiguration module for performing network optimizing reconfiguration. The active reconfiguration strategy of the distribution network and the preventing control method according to the invention are mainly applied for safe operation and preventing control of the distribution network.

The new type nodal real-time gas densitymonitoring method and sensor has one near infrared DFB semiconductor laser and operates on the characteristic absorption of methane in the near infrared spectrum region. One monomode fiber power coupler is used in separating the laser beam into several beams led through fibers to fiber gas absorption cells in mine, and the laser beams through the absorbed gas are then led through fiber to the input optical switch. The selected signal through the calibrating cell is projected to the laser detector. By means of wavelength modulating technology and second harmonic detecting technology, the present invention realizes gas density measurement in high sensitivity, high resolution, no gas interference and fast response. Background light strength signal fitting method is adopted to eliminate the influence of light strength fluctuation on the measurement.

A gob-side entry retaining pasty filler on-line detection method comprises the steps that before each monitored space is ready to be filled, supporting rods are fixed to a base plate of a space to be filled through ground anchors, the upper ends of the supporting rods support a top plate of the space to be filled, measuring optical fibers are arranged between the supporting rods, an optical fiber connector is introduced out of the tail portion of the last supporting rod in each set of supporting rods and is connected in a mining optical cable through optical fibers so that optical fiber monitoring signals can be transmitted to a distributed optical fiber demodulator, demodulated signals are transmitted to a computer system, and pasty filler is monitored in real time on line and is analyzed and processed after the space is filled. The gob-side entry retaining pasty filler on-line detection method has the advantages that equipment installation is easy, the method is suitable for being universally popularized, no power supply is needed under a well, a site is safe, all-optical measurement and optical fiber transmission are adopted, influences caused by electromagnetic interference are effectively avoided, a monitoring result can be provided in time, and the method is favorable for directing on-site filling mining production work.

The invention discloses a composite material connection structure pre-tightening force online monitoring method. The composite material connection structure pre-tightening force online monitoring method comprises the steps of firstly embedding a strain sensor into a metal bolt, embedding a strain sensor for temperature compensation into a metal bolt for temperature compensation, wherein the strain sensor is connected with a measurement channel of a strain gage, and the strain sensor for temperature compensation is connected with a temperature compensation channel of the strain gage; then exerting drawing force to perform a tensile test at two ends of the meta bolt to measure elasticity modulus of the metal bolt; finally applying the metal bolt of the strain sensor into a composite material connection structure, and calculating change relation of pre-tightening force borne by the bolt and the time according to bolt strain measured by the strain gage under the pre-tightening force effect and the elasticity modulus of a bolt material tested by the tensile test. The composite material connection structure pre-tightening force online monitoring method is especially suitable for measurement of composite material connection structure pre-tightening force and provides a basis for evaluation of the healthy condition of the composite material connection structure at present and within a time period.

The invention discloses a device for fluidly injecting and rapidly analyzing residual chlorine of water quality and an analysis method thereof. The device comprises a photoelectric flow cell, a reacting tube, an indicator liquid storage vase, a current-carrying liquid storage vase, a first peristaltic pump, a current-carrying liquid injection pump, a second peristaltic pump, a current-carrying liquid three-way valve, a first sampling six-way valve, a second sampling six-way valve, a capillary tube, a sampling capillary tube, a first guide sample source, a second guide sample source, a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve and the second electromagnetic valve are switched with a water sample source. In the invention, the sampling capillary tube with a fixed length is adopted, the water sample ration is accurate, the dispersed state of the sample in the current-carrying liquid has high repeatability in a certain retained time, the measurement result is accurate, and the flow path is simple, thereby being easy for realizing automation, real-time and on-line monitoring and low failure rate. The invention can be used for on-line monitoring of the residual chlorine in drinking water and industrial recirculating cooling water, conveniently and rapidly obtaining real-time analysis data, and especially finding, reporting and handling water pollution accidents with serious idiopathic.

The invention provides a TDLAS-based detection device and method of trace CO gas concentration, and solves the problems of deviation of the measured CO gas concentration value and low reliability of measurement results in the prior art. The detection device comprises a function signal generator, a laser device, a collimator, a flowmeter, an air pump, a herriott absorption cell, a temperature sensor, a pressure sensor, a focusing lens, a photoelectric detector, a preamplifier, a digital lock-in amplifier, a microprocessor and a computer, wherein a correcting module is arranged in the microprocessor, and the correcting module is used for correcting the detected gas concentration value. The detection device and method are mainly used for real-time automatic monitoring of trace CO gas, and can effectively avoid the occurrence of death accidents of personnel by poisoning of CO gas.

The invention discloses a method for preventing and controlling the nitrogen blockage of an argon preparation system of a space division device, which comprises the following steps: selecting measurement values of all important indexes of the argon content of an argon fraction, the argon fraction temperature, the argon content of the top of a rough argon tower II and the oxygen purity of a product as controlled variables, wherein the argon content of the argon fraction and the argon fraction temperature are used as a first defensive line for monitoring nitrogen blockage, the argon content of the top of the rough argon tower II is used as a second defensive line, the two defensive lines are used for directly and accurately reflecting whether the argon preparation system generates the nitrogen blockage or not, and the oxygen purity of the product is used for reflecting whether the working condition of a main tower is stable or not; selecting the oxygen taking content, the pure liquid nitrogen reflux amount of an upper tower and the rough argon extraction content as operation variables; and calculating the optimal control increment of all the current operation variables by a predicting control algorithm so as to adjust the working condition of the rectification of the main tower and the argon system. The invention can monitor and adjust the change of the content of oxygen, argon and nitrogen of the argon system in real time under a steady working condition and variable load and effectively prevent and process the nitrogen blockage of the space division device fundamentally.

The invention discloses an electro-arc heater airflow enthalpy value spectral measurement system. Based on the emission spectrum diagnosis technology, the electro-arc heater airflow enthalpy value spectral measurement system is used for acquiring the enthalpy value characteristic of high enthalpy air flow in ground heat prevention test of an electro-arc heater, the emission spectrum intensity of atom oxygen or atom nitrogen can be measured through experiments, and the enthalpy value of the airflow can be directly obtained by utilizing the quantitative relation between the emission spectrum intensity ratio of target component and the enthalpy value of high-temperature airflow. Based on the method, the quantitative measurement on the enthalpy value within the range of low enthalpy (5MJ / kg) to high enthalpy (25MJ / kg) can be realized, and the electro-arc heater airflow enthalpy value spectral measurement system is applicable to the diagnosis of total enthalpy value of airflow of various stacked, segmented, tubular electro-arc heaters.

The invention discloses a multi-modal process fault detection method and system based on vine copula correlation description. The detection method comprises the following steps: obtaining a training sample set of normal data under different modals according to expert knowledge or adopting a clustering method; carrying out correlation modeling by utilizing C-vine copula and obtaining a joint probability density function of each modal; carrying out sampling on the joint probability density functions of different modals by utilizing a Markov Monte Carlo method and calculating the value of the joint probability density function of each sample; determining discretization step length l according to control limits and establishing a static density quantile table of the process by utilizing a density quantile method; estimating general local probability index PL<k> (Xt<monitor>), under the modal k, of monitoring data Xt<monitor> at the moment t by searching the table; and calculating BIP index by adopting Bayesian reasoning, and judging whether the index is beyond the limit so as to achieve real-time process monitoring.

The invention provides an online power monitoring device for a high-power all-fiber laser device and a packaging method thereof. Low-refractive-index coating glue is applied to a welding point between each output level of the all-fiber laser device and the next output level of the all-fiber laser device, so that the optical fiber welding points are reinforced, a metal clamp to which a photoelectric detector is fixed and the corresponding welding point are packaged together, the online power monitoring device is attached to a laser device cooling heat sink, and heat generated by the welding point and a photoelectric detector is carried away through heat conduction between the metal clamp and the heat sink. In this way, optical fibers can not be damaged, and the whole all-fiber laser device can not be damaged; furthermore, the photoelectric detector is high in response speed, so that quick online monitoring of the power of the laser device can be achieved in real time; due to the fact that closed-loop control is achieved between the online power monitoring device and a power supply of a laser device system, the laser device system can be effectively protected, and a measured power value is high in accuracy.

The invention relates to an ultrasonic monitoring sensor for the corrosion of a steel bar in concrete. The ultrasonic monitoring sensor is characterized by being provided with a steel bar (1), wherein a piezoelectric ceramic column (2) for transmitting is arranged at one end of the steel bar (1) and is used for transmitting ultrasonic waves; a piezoelectric ceramic column (3) for receiving is arranged at the other end of the steel bar (1) and is used for receiving the ultrasonic waves; the axial directions of the piezoelectric ceramic column (2) and the piezoelectric ceramic column (3) are the same as the axial direction of the steel bar; the piezoelectric ceramic column (2) for transmitting and the piezoelectric ceramic column (3) for receiving are provided with a shielding lead wire (4) for transmitting and a shielding lead wire (5) for receiving, respectively; the shielding lead wire (4) for transmitting and the shielding lead wire (5) for receiving are externally provided with a resin insulating layer (6) and a shielding layer (7), respectively; in the use process, the sensor is buried into the concrete during construction; the shielding lead wire (4) for transmitting is connected with a signal generator (8) to generate the ultrasonic waves and the shielding lead wire (5) for receiving is connected with a signal receiver (9) to receive the ultrasonic waves; the corrosion condition of the steel bar in the concrete (10) is monitored according to the change of received ultrasonic wave signals.

The present invention particularly relates to a capacitive disturbance bound alarm system and an alarm method thereof. The alarm system comprises an alarm controller, alarm cables which are coupled to the alarm system, an alarm monitoring platform and an environment monitoring device which is coupled to the alarm monitoring platform. The alarm cables are used for surrounding a forbidden zone. The alarm controller which supplies power to the alarm cables such that distributed capacitors are formed between the alarm cables and between the alarm cables and the ground, and an alarm signal and position information are sent to the alarm monitoring platform. The environment monitoring device monitors an environmental parameter and sends the environmental parameter to the alarm monitoring platform. The alarm monitoring platform is used for monitoring the alarm controller and the environment monitoring device and adjusting the thresholds of the sensitivity of the alarm controller according to the environmental parameter. According to the alarm system and the alarm method, the security of a defense area is improved.

The invention discloses a battery online monitoring system and method. The system comprises a host computer, a battery information integrated management host, a data concentration module and a plurality of data acquisition modules. The data acquisition module is used for acquiring the individual voltage, the, the internal resistance, the charge and discharge current and temperature information ofa battery pack, and adjusting the voltage balance of the battery pack. The battery information integrated management host is electrically connected with the host computer and the data concentration module through a communication unit. The data concentration module interacts with the data acquisition modules successively. The battery online monitoring system and method replaces a battery insulationmonitoring device, uses new technology to monitor multiple states of the battery, and provides a battery monitoring function. The battery online monitoring system and method prolong the service lifeof the battery, saves the purchase fund of the battery, detect hidden dangers timely and reduce power loss. By means of the battery online monitoring system and method, it is no longer required to manually detect the internal resistance of the battery regularly and verify the capacity annually by operation and maintenance workers.

The invention discloses a phi-OTDR based external damage vibration monitoring identification method of an oil gas pipeline. The method comprises the following steps that a phase-sensitive photosensitive time-domain reflectometer monitors and obtains a fiber vibration signal caused by disturbance along the oil gas pipeline; wavelet filtering is carried out on the obtained vibration signal, and DC and low-frequency components are filtered from the signal; the filtered vibration signal is converted into the time domain and frequency domain by short time Fourier transformation, and a time-frequency atlas of the vibration signal is obtained; according to time-frequency information features of mechanical work, mechanical digging impact and manual digging behaviors, characteristic information ofthe corresponding behaviors is extracted from the time-frequency atlas; and the mode of a behavior occurring in the surrounding of the monitored pipeline is determined and identified according to theextracted characteristic information, and alarm information is output. External damage behaviors including mechanical work, mechanical digging impact and manual digging behaviors in the surrounding ofthe monitored pipeline can be identified effectively, and real-time long-distance online monitoring is realized for vibration external damage of the oil gas pipeline.

The invention discloses a remote system for monitoring water quality parameters through cellular wireless communication. The remote system comprises a plurality of information collection terminals, a gateway, a WEB server, a database and a monitoring terminal, wherein the plurality of information collection terminals are distributed in a cellular shape and used for sending a plurality of collected water quality data to the gateway through a ZIGBEE (Zigbee) network; the gateway is used for receiving the water quality data and sending the water quality data to the WEB server through an internet protocol; the WEB server is used for carrying out centralized processing and analysis on the water quality data of each information collection terminal, obtaining result data and saving the result data in the database; the monitoring terminal is communicated with the WEB server through the internet protocol and used for observing the result data in the WEB server. The structure of the remote system comprises the cellular collection terminals, the gateway and the server which are auxiliary to each other, so that the simplicity and stability of processes of operating, collecting data, processing data, displaying web interfaces and monitoring clients and the like of the overall system can be realized.

The invention discloses an automatic management and control system of a Beidou electric vehicle based on a terminal APP. The automatic management and control system comprises an automatic management and control terminal of the Beidou electric vehicle, a communication transmission network, a background control center and the terminal APP, wherein the automatic management and control terminal of the Beidou electric vehicle is integrated in the inner part of an electric vehicle controller; the terminal APP is arranged in a mobile equipment terminal such as a cellphone and a PAD; a signal of the electric vehicle is transmitted to the background control center by the automatic management and control terminal of the Beidou electric vehicle through the communication transmission network, and then the signal is transmitted to the terminal APP by the background control center. The terminal APP can transmit an instruction through the background control center, so that daily managements such as navigating and positioning the electric vehicle, managing an electronic anti-theft fence and automatically locking the electric vehicle can be performed; the automatic management and control system of the Beidou electric vehicle based on the terminal APP, which is disclosed by the invention, can allow a vehicle owner to realize the long-distance real-time all-weather full-automatic on-line monitoring of the electric vehicle through the terminal APP.

The invention provides a device and a method for monitoring the tension of a steel wire rope of FBG compression type mine hoisting equipment. The device comprises the steel wire rope, anti-slip wedged rubber rings and a packaging casing, wherein the wedged rubber rings are buckled, clamped and nested on the steel wire rope; an elastic compression column and a U-shaped fixing support fixedly connected with the elastic compression column are arranged inside the packaging casing; the U-shaped fixing support is used for fixing a fixed pulley; FBGs are pasted to the upper end surface and the lower end surface of the elastic compression column; the FBGs are connected onto optical fibers in series; each optical fiber penetrates through an optical fiber lead-out hole to be connected with one end of each optical fiber connector outside the packaging casing; the insides of the optical fiber lead-out holes are sealed with sealant; the other ends of the optical fiber connectors are connected with optical fiber pigtails; the optical fiber pigtails are protected by using armed protection rubber; and the top and the bottom of the packaging casing are fastened by clamp nuts and bolts penetrating through bolt holes. The device is simple in structure and convenient to mount, operate and use, the tension can be monitored on the side and on line, an FBG sensing technology is used, the reliability and the measurement accuracy are high, and the error is smaller.

The invention discloses a multifunctional power cable fault location online monitoring system. Fault detection devices are arranged on a bus, and one fault detection device is arranged for every 28 km; the fault detection devices communicate with a fault location host wirelessly; the fault location host communicates with a backstage management server via a GPRS wireless network; and timing is carried out on the fault detection devices, the fault location host and the backstage management server via a GPS system. By adopting traveling wave and ultrasonic wave fault detection and location technologies, short circuit and grounding fault of the cable can be detected, local discharge fault can also be accurately judged, and real-time online monitoring and remote control can be realized.

The invention relates to a remote bridge structure monitoring and prewarning method based on an Internet of things technology. The remote bridge structure monitoring and prewarning method comprises the following steps of: (1) building a bridge model and calculating to obtain the dynamic deflection of a beam; (2) continuously acquiring data of monitored points to obtain a sequence [u] of the dynamic deflection, and carrying out forecast evaluation on the performances of a bridge system by using a specific mode based on a chaotic system, wherein the step (2) comprises the substeps of: (2.1) calculating a maximum Lyapunov index of the sequence [u]; (2.2) calculating the delay time and an optimal embedded dimension; and (2.3) carrying out fitting and contrast on the reconfigured chaotic time sequence to realize health monitoring and prewarning of a bridge structure. The remote bridge structure monitoring and prewarning method is used for analyzing the monitored data and precast evaluation on the future working state of a bridge to realize prewarning.