132results about How to "Easy to monitor online" patented technology

The invention discloses a welding process information acquisition and quality monitoring system based on an Ethernet. STM32 is used as a remote data acquisition terminal main control unit for receiving welding parameters acquired by a sensing device in real time and implement analog / digital (A / D) conversion; and the STM32 sends A / D conversion data to a main control server by using an ENC28J60 and using a user datagram protocol (UDP) through a switch, receives control commands, and returns response information to the main control server. If the main control server sends an acquisition instruction, the STM32 executes A / D conversion and sends the result to the main control server, the main control server converts the result into current and voltage parameters, and the parameters are displayed and stored in a waveform mode; and by adopting command interaction in the main control server, all terminals connected with the main control server execute the acquisition command according to the specified requirement, acquire running state information of welding equipment and display states in real time to finish remote online monitoring operation of the welding equipment.

The invention discloses a power transmission line sag on-line monitoring method. The method includes: firstly installing an on-line monitoring device on the lead between two adjacent towers and close to one tower, using a laser range finder to measure the vertical distance from the tops of the two adjacent towers to the ground and the horizontal distance between the two adjacent towers, and recording data; energizing the power transmission line, and adopting a lead mutual inductance energy acquiring way for the on-line monitoring device; configuring the measured data into the on-line monitoring device by means of GPRS or a handset; measuring the inclination angle between one lead end and the horizontal plane by an inclination angle sensor; employing an accurate sag calculation method to calculate the height from the lowest point of the lead to the ground by a microcontroller in the on-line monitoring device; composing the position, sag, equation and inclination angle information into a data frame by the on-line monitoring device, and sending the data frame to a remote server or internet through GPRS. The method and device provided by the invention performs mathematical modeling on the power transmission line, accurately calculates the maximum sag value, and is conducive to on-line monitoring of the sag.

The invention discloses a laser heating-assisted milling device capable of real-time monitoring tool wear. The laser heating-assisted milling device capable of real-time monitoring tool wear comprises a milling device, a laser heating device and a real-time monitoring device. The milling device comprises a CNC (Computer Numerical Control) milling machine table, a milling cutter and a workpiece fixed to the CNC milling machine table; the laser heating device comprises a laser focus head; a laser light is incident on the surface of the workpiece through the laser focus head; the real-time monitoring device comprises a plurality of acoustic emission sensors, a signal processing module, a data acquisition processing module and an industrial personal computer; the acoustic emission sensors are arranged on the workpiece and are used for detecting acoustic emission signals of the milling cutter at a milling state; the acoustic emission signals are processed through the signal processing module and the data acquisition processing module and then are stored in the industrial personal computer; and through processing and analyzing, the real-time wear condition of the milling cutter is obtained.

The invention discloses an online monitoring method and an online monitoring device for identities of personnel in a vehicle, and a storage medium. The online monitoring method comprises the steps of:acquiring face image information of the personnel in the vehicle in real time by means of a face acquisition device, wherein the personnel in the vehicle at least comprises a driver; and performingface recognition on the driver according to the acquired face image information of the personnel in the vehicle, transmitting a recognition result and an acquired face picture to a management cloud platform in real time through wireless communication, querying personnel identity in a database and performing personnel identity online monitoring by means of the management cloud platform, and transmitting a monitoring result to a preset management terminal of the management cloud platform in real time. The online monitoring method, the online monitoring device and the storage medium realize the flexible and convenient real-time online monitoring of the identities of the driver and passengers in the vehicle, improve the intelligence and efficiency of personnel detection, satisfy the security requirements in special occasions, can completely eradicate the substitution of the driver in the midway, can analyze the driving time of a certain driver by using online data, and performs fatigue driving early warning.

The invention discloses a fussily self-adaptive PID temperature and humidity control method based on an improved PSO (Particle Swarm Optimization) algorithm. The control method comprises the following steps: (S01) obtaining a collection quantity deviation and the variance ratio of the collection quantity deviation; (S02) carrying out fuzzing treatment on the collection quantity deviation and the variance ratio of the collection quantity deviation; (S03) performing fuzzing inference and defuzzing; (S04) iteratively obtaining the original values of PID parameters based on the improved PSO algorithm; and (S05) according to the optimized fuzzily self-adaptive PID parameters obtained in the step S04, carrying out fuzzily self-adaptive PID control on a fan frequency transformer, so as to control the frequency of the fan frequency transformer, the openness degrees of a cooling water three-way valve and a humidifying valve. Based on the PSO algorithm, the self-factors of particles and social factors are introduced, so that optimal PID original parameter values can be rapidly and accurately found; and by combining the fuzzy control and traditional PID control, the indoor temperature and humidity can be well monitored and optimized online in real time through a control system.

The invention provides a method for maintaining the predication capability of a spectrum correction model of a complex system under the conditions that an optical spectrum instrument or experiment conditions are changed. The method comprises the following steps of: 1) detecting the spectrum data of a plurality of standard samples; 2) predicting the concentration (or other chemical and physical properties) of an ingredient to be of detected of the standard sample from the spectrum data of the standard sample by using an original spectrum connection model, and predicating system offset; 3) building a prediction result correction model between the spectrum data of the standard sample and the system offset of the prediction result of the correction module; and 4) combining the prediction result correction model with the original correction model in use so as to solve the common problem that the accuracy of the prediction result varies with the optical spectrum instrument or the experiment conditions. The method is convenient to use and wide in application scope, realizes the sharing of the spectrum correction model among the instruments of the same kind and has validity for long-term use even if the experiment conditions are changed.

The invention relates to a frequency safety online monitoring and assessment method of a power system, which comprises the following steps: (1) setting a transient frequency safety binary table (fcr, fcr); (2) acquiring real-time frequency data of all monitoring points of the power system from an energy management system (EMS); (3) filtering the dynamic frequency data of all the monitoring points on the basis of a moving average method; (4) primarily analyzing the frequency data; (5) analyzing every group of dynamic frequency data, and calculating a frequency safety margin index according to the relationship between a frequency curve and the binary table (fcr, fcr) by the following three conditions: (1) tb = 0; (2) 0 < tb < tcr; and (3) tb > tcr, wherein tb is time that the frequency curve in an observation window deviates from fcr, and a frequency safety quantitative assessment method which takes frequency deviation cumulative effect is applied to the frequency safety margin calculation; and (6) comprehensively analyzing the frequency safety margin calculation results of all the monitoring points, taking the minimum margin value as a system frequency safety margin, and feeding back the system frequency safety margin to the energy management system for information display.

The invention relates to a distribution network cable fault on-line distance measuring equipment and a distance measuring method. The output / input end of a current sensor of which the working band is 3MHz, is connected with the output / input end of a signal detection circuit; the output / input end of the signal detection circuit is connected with a 100MHz A / D conversion module; the 100MHz A / D conversion module is connected with the signal output / input end of an HFBR series fiber optic transceiver; the signal output / input end of the HFBR series fiber optic transceiver is connected with a cushion circuit; and the cushion circuit is connected with a host computer. The hybrid photoelectric current sensor can be used for conveniently acquiring fault transient signals of high-tension cables and any other power supply cables. The traveling wave method of fault transient signals is used for measuring the fault distance of high resistance, low resistance, periodic and flashover fault and any other faults. Since the invention can be used for identifying the cable initial fault and measuring the fault position under the conditions of power supply, people can repair and maintain the cable in advance, thereby obviously reducing economic loss due to power cut.

The invention discloses one-way continuous fiber-reinforced resin-based composite prepreg and a preparation method thereof and belongs to the technical field of resin-based composites. Particularly, a solvent is used for preparing a saturated solution containing soluble resin or one or more of active monomers of the soluble resin, a curing agent, a catalyst and a prepolymer, powder of another resin or filler is added, and a suspension with part of soluble components evenly formed on the surface of the powder is formed through a phase inversion method for dipping; fiber bundles are arranged after being dipped, rolling is carried out after the solvent is evaporated to dryness, and the prepreg is obtained. The prepreg has good laying performance and can be formed at low pressure, and low porosity is obtained. A first component is soluble resin or one or more of the active monomers of the soluble resin, the curing agent, the catalyst and the prepolymer. A second component is resin matrix powder or reinforcing and toughening filler powder.

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 an online large tank floor plate corrosion defect monitoring system and method. The detection system comprises an excitation device, a sensing device and a treatment device, wherein the excitation device is arranged at an exposed part of the edge of the tank floor plate or the outer wall of the tank; the sensing device adopts a distributed optical fiber sensing system or anacoustic emission sensor; when the sensing device adopts the distributed optical fiber sensing system, sensing optical fibers of the distributed optical fiber sensing system are arranged on the innerwalls of the tank floor plate; when the sensing device adopts the acoustic emission sensor, the acoustic emission sensor is suspended in the middle of the inner cavity of the tank by virtue of a hanger rope; the signal output part of the sensing device is connected with the treatment device. The system disclosed by the invention has the beneficial technical effects that the online large tank floorplate corrosion defect monitoring system and method are provided; the defects of the tank floor plate can be monitored on line by the technology, the monitoring operation is simple, the cost is low,and the detecting and positioning accuracy is high.

The invention provides an overvoltage measuring sensor for an overhead transmission line based on a coupling electric field, and relates to an overvoltage online monitoring sensor of the overhead transmission line. The overvoltage measuring sensor provided by the invention mainly comprises a sensor shell, an insulating pad, a fixing board, a partial voltage capacitor group, a matching resistor, a coaxial cable, an inner screening shell, a data collecting unit and the like. The overvoltage measuring sensor provided by the invention has the advantages of simple structure, convenience in mounting and dismounting, low cost, high accuracy of overvoltage measurement, good linearity, high accuracy, strong generality, wide application range, safe and reliable use and the like. With the adoption of the overvoltage measuring sensor provided by the invention, overvoltage online monitoring can be conveniently carried out on the overhead transmission line. The overvoltage measuring sensor provided by the invention can be widely applied to the overvoltage online monitoring of the overhead transmission line, and is particularly suitable for monitoring overvoltage of 110-1000 kV high-voltage overhead transmission lines on line.

The invention relates to an electrolysis direct current online insulated monitoring device and a monitoring method. The device comprises a first voltage transducer and a second voltage transducer which are connected in series at two ends of a high electrolysis direct current bus voltage, a fifth voltage transducer parallelly connected with the first voltage transducer and the second voltage transducer which are connected in series, and electrolytic cells arranged at the two ends of the high electrolysis direct current bus voltage. The device is characterized in that: a third voltage transducer and a fourth voltage transducer, which are connected in series, are arranged at the two ends of the high electrolysis direct current bus voltage; a fuse is arranged between each of the first and second voltage transducers and the neutral point of a high electrolysis direct current bus; the third voltage transducer and the fourth transducer are grounded; the output put ends of the first voltage transducer, the second voltage transducer, the third voltage transducer, the fourth voltage transducer and the fifth voltage transducer are connected with a PLC input and output module; and the PLC input and output module is connected with a display screen.

The invention discloses a control system of a solar cell module support; the system comprises a controller, and an azimuth angle calculator, a height angle calculator, an azimuth angle detection device and a height angle detection device which are respectively connected with the controller. The invention also discloses a control method of the solar cell module support. According to the control system of the solar cell module support, a solar cell module for the solar cell module support can be controlled, so that the solar cell module can track the moving track of the sun, an angle formed by a plane of the solar cell module and the horizontal plane can be adjusted randomly, the solar cell module in any latitude can receive the sunlight which is incident vertically, and the energy of sunlight is fully utilized.

The invention discloses a lightning arrester on-line monitoring system and a control method thereof and belongs to the technical field of lightning arrester monitoring. The lightning arrester on-linemonitoring system comprises multiple lightning arrester monitoring devices, an NBIOT (narrow-band Internet of Things) and a monitoring center control system, and the lightning arrester monitoring device is used for monitoring the operating status of the lightning arrester in real time to acquire status data and sending the status data to the NBIOT; the NBIOT is used for identifying and processingthe status data of the lightning arrester and transmitting the status data to the monitoring center control system; the monitoring center control system is used for analyzing and processing the statusdata of the lightning arrester to acquire analysis result data and adjust configuration data. The on-line monitoring system of the lightning arrester is established on the basis of the NBIOT, cost isgreatly lowered due to reuse of existing cellular base stations, large scale power network monitoring is facilitated, and maintenance cost of the system is lowered.

The invention belongs to the field of linear variable differential transformer type sensors, and relates to a linear variable differential transformer type sensor and a winding method. The sensor is characterized in that along the axial direction of a coil spool (3), the coil density of a secondary coil A is gradually increased, the coil density of a secondary coil B is reduced, the secondary coil A and the secondary coil B are arranged around the whole coil spool (3), the coil total numbers of the secondary coil A and the secondary coil B are basically the same in any segment of the coil spool (3), and discrete coils are employed so that manual winding is facilitated. According to the linear variable differential transformer type sensor coil winding method, the measuring range ratio is high, the usage efficiency of the coil spool of the sensor is improved, constant sum-value voltage is output, and online monitoring of the sensor is facilitated.

The invention discloses a capacitive sensor which is characterized in that a positioning convex ring is arranged on a ceramic insulation ring, the inner wall of a metal jacket is provided with a limiting convex ring, a high-temperature hard cable is connected with the ceramic insulation ring, a core electrode comprises a clamping ring and a connecting rod, one end of the ceramic insulation ring is provided with a clamping cavity, a high-temperature core wire in the high-temperature hard cable is fixedly connected with the connecting rod, a metal pressing sleeve is welded and fixed to a metal outer shielding layer of the high-temperature hard cable, the metal pressing sleeve is connected to the positioning convex ring in a butting mode, and the outer surface of the metal pressing sleeve is fixedly connected with the metal jacket. The capacitive sensor has the advantages that the ceramic insulation ring is fixedly clamped into the metal jacket, surface metallization is needless, a high-temperature probe is firmly connected with the hard-temperature hard cable, the situation that parts fall and a to-be-tested system is damaged can be prevented, welding is carried out between metal, and laser welding can be carried out; due to the fact that the high-temperature hard cable is matched with a low-temperature soft cable, the high-temperature-resistance characteristic can be guaranteed, cost is reduced, and on-line monitoring of the equipment is facilitated.

The invention discloses a virtual sensor array which comprises a heating base, a sensor substrate, a gas sensitive nano-material and a testing electrode. The invention further discloses a method for preparing the virtual sensor array. A sensor is prepared from the gas sensitive nano-material, experimental temperature is changed by pulse heating voltage, the virtual sensor array is formed, the physical array scale of the sensor can be decreased, online monitoring of electric power equipment is facilitated, and working energy consumption can be effectively reduced.

The invention discloses a current and voltage sensor integrated box and a motor parameter real-time acquisition apparatus and method with the same. The motor parameter real-time acquisition apparatus also comprises a power supply module, a torque and speed sensor module and an AppSIM simulation platform; the power supply module is connected with a three-phase four-wire input end of the current and voltage sensor integrated box, a three-phase four-wire output end of the current and voltage sensor integrated box is connected with a stator winding of a motor, the torque and speed sensor module is connected with a rotor of the motor, and the AppSIM simulation platform is connected with the current and voltage sensor integrated box and the torque and speed sensor module respectively. The motor parameter real-time acquisition apparatus is used for the real-time acquisition, storage and display of three-way voltage and three-way current signals output by the current and voltage sensor integrated box as well as for the output of speed signals and torque signals output by the torque and speed sensor module. According to the current and voltage sensor integrated box and the motor parameter real-time acquisition apparatus and method with the same, the real-time acquisition, analysis, processing, online display and dynamic storage of motor parameters can be achieved, and good real-time performance and stability are obtained.

The invention discloses a ship tail gas online monitoring system which comprises tail gas analysis equipment arranged on a ship and tail gas monitoring equipment arranged on the bank. The tail gas analysis equipment comprises a tail gas collection analysis instrument, a light emitter, a light receiver, a temperature compensation device and a first communication device; the tail gas monitoring equipment comprises an information display and alarm device, an electronic nautical chart system and a second communication device; the electronic nautical chart system and the second communication deviceare respectively connected to the information display and alarm device; and the first communication device and the second communication device carry out data communication in a wireless communicationmode. According to the invention, ship tail gas monitoring efficiency and monitoring accuracy can be improved, and the ship tail gas online monitoring system is greatly convenient for the maritime law enforcement department to carry out online monitoring on emission of ship tail gas in a ship pollution emission control region and fulfills the aims of effective monitoring, real-time monitoring andtotal monitoring.

The invention discloses an online monitoring method, device and system for the output capacitor of a switching power supply. The method comprises the following steps that: obtaining the sampling signal of the output voltage of the switching power supply; according to the sampling signal, obtaining the voltage minimum value and the voltage maximum value of the output voltage alternating current component of the switching power supply in any one period; and substituting the voltage minimum value and the voltage maximum value into an output capacitor model to obtain the equivalent series resistance and the equivalent capacitance of the output capacitor. By use of the method, according to the voltage minimum value and the voltage maximum value of the output voltage alternating current component of the switching power supply in any one period, the equivalent series resistance and the equivalent capacitance of the output capacitor are calculated through the output capacitor model, only the output voltage of the switching power supply needs to be sampled, a current structure does not need to be revised so as to be favorable for online monitoring, and monitoring cost is lowered. The methodcan be widely applied to the technical field of switching power supply monitoring.

The invention provides an oil-paper insulation equipment aging state identification method based on Raman spectrum clustering analysis. The method comprises the following steps: respectively acquiringa plurality of oil-paper insulation samples of a known aging stage and an unknown aging stage through an oil-paper insulation thermal aging experiment; acquiring Raman spectrum data of a plurality ofoil paper insulation samples in a known aging stages and unknown aging stage, and carrying out standardization processing; adopting a principal component analysis method to extract Raman spectrum characteristic quantity of the standardized oiled paper insulation samples in the known aging stage, and establishing an oiled paper insulation aging evaluation model based on a clustering analysis method; and inputting the Raman spectrum characteristic quantity of the oiled paper insulation sample in the unknown aging stage into the model for clustering analysis to obtain the aging stage of the oiled paper insulation sample in the unknown aging stage. According to the invention, on the basis of Raman spectrum measurement, the oilpaper insulation aging evaluation model is established, aging stateanalysis is carried out, and diagnosis of the overall aging state of the on-site oilpaper insulation equipment can be rapidly and effectively realized.

The invention relates to a determination method of steam turbine generator unit exhaust enthalpy. By computing steam turbine generator low-pressure cylinder inner power and steam turbine generator low-pressure cylinder ideal inner power, steam turbine generator exhaust enthalpy is determined finally. According to the exhaust enthalpy determination method, measuring of steam turbine last-stage moisture is avoided, computing of a low-pressure cylinder in a wet steam zone does not need to be considered, especially under low loading, dropping of the wet steam zone of the low-pressure cylinder is expanded, and great convenience is provided for economical on-line monitoring of a condensing steam turbine. Exhaust enthalpy accuracy is high, the absolute error is 1.194%, and engineering requirement can be met.

The invention provides an associative colorimetric measuring method for associatively measuring total phosphorus and a chemical oxygen demand (COD), which is characterized by comprising the following steps: based on the associative colorimetric measurement of a Fenton reagent to the total phosphorus and the COD, adopting malachite green-ammonium molybdate as a color-developing agent, forming a colored complex compound through phosphate radicals and the color-developing agent to achieve the measurement of the total phosphorus, adopting a malachite green as the color-developing agent, based on the competition mechanism of the COD and the malachite green, namely, the residual quantity of the malachite green and the COD is in direct proportion in certain time that a system digests, and achieving the measurement of the COD. The key of associative measurement is that: based on the action of the Fenton regent, the total phosphorus and the COD are digested through catalyzing H2O2 (hydrogen peroxide) by a metal ionic catalyst in an acidic medium to generate free hydroxyl radicals (OH-) with strong oxidizability; and by using the associative measurement of the total phosphorus and the COD based on the Fenton reagent, the problems of a conventional measuring method for the total phosphorus and the COD that the reagent types are various, the process is complicated, the time and the energyare consumed, the steps are fussy, a high-temperature concentrated acid is needed, and further, the field quick measurement is not available can be solved.

The invention discloses a steel wire rope tension on-line monitoring device, which comprises a wireless acquisition transmitter and a wireless receiver, wherein the wireless acquisition transmitter isconnected with a signal amplification conditioning circuit which is connected with a strain type pressure sensor, the strain type pressure sensor acquires the tension of the steel wire rope, the steel wire rope is connected with a skip bucket and a hoist fixed on the ground through three rollers and a crown pulley, and the wireless acquisition transmitter transmits signals acquired by the straintype pressure sensor to a wireless receiver through wireless transmission, and the wireless receiver transmits the signals to an upper PC through an acquisition card and a serial port. According to the invention, the tension value of the steel wire rope can be directly equal to the pressure value of the strain type pressure sensor, the installation and maintenance are convenient, the upper PC candisplay the tension value in real time and reduce the wiring problem of a mine under complex conditions by using ZigBee wireless networking technology when the tension values exceeds a warning value,and the safety and practicability are greatly improved.

The invention discloses an intelligent substation switch online monitoring system. The system comprises a switch monitoring management system, a switch monitoring management data cloud and an intelligent substation switch, wherein the switch monitoring management system is in data transmission and communication with the intelligent substation switch; and the switch monitoring and management system is used for acquiring the operation state information of the intelligent substation switch in real time and analyzing and processing the operation state information to obtain switch operation monitoring state information and alarm information, and sending the switch operation monitoring state information and the alarm information to the switch monitoring and management data cloud for storage and optimal configuration. Online monitoring of the intelligent substation switch can be rapidly and conveniently completed, monitoring data are complete and reliable, the alarm response speed is high, and the network security of an intelligent substation is guaranteed; and modular design is adopted, the structure is reasonable, the response speed is high, and safety and reliability are achieved.

This invention relates to a kind of contact case structure of High Voltage temperature on-line monitoring that directly connect with photoelectric conversion optical fiber, belongs to high-voltage switch equipment's temperature on-line monitoring plant. The invention is a contact case structure, upper end of main body has blowhole; inlet influence power supply in interior of blowhole's inner, and power supply's feedthru connect with photoelectric transducer; embedding thermal detector on fixed unit of main body inner wall, and its feedthru connect with photoelectric transducer; top of main body set up cover at photoelectric transducer's location; opposite side of blowhole on the main body has set one penetrating slotted hole; and one side of slotted hole be furnished with ir emission tube that connect with photoelectric transducer; optical fiber penetrate slotted hole to connect with ir receiving tube on the control unit.

According to the technical scheme, the bolt assembly for the high-voltage power transmission tower comprises a bolt and a nut which are used for fixing angle steel of the high-voltage power transmission tower, an information acquisition module is arranged on the side, facing the angle steel, of the bolt and / or the nut, the information acquisition module is extruded by the angle steel bolt assembly; the information acquisition module is for acquiring and transmitting a pressure signal, and a terminal processing module for receiving and analyzing the pressure signal is further included. The boltassembly has the beneficial effects that the pre-tightening force of the bolt is decoded into an electric signal, so that the state of the bolt assembly of the power transmission tower can be conveniently monitored on line, data can be dynamically analyzed in real time, and is convenient to analyze, monitor and collect, a historical curve can be formed, so that subsequent research on the bolt assembly can be deeper, a wireless transmission module is used, a line is simpler, the communication distance is long, and disconnection is not likely to happen.

The present invention provides a real-time environmental testing and analyzing device and method for a ship's integrated electric propulsion system based on LabVIEW platform. The system comprises three logarithmic cycle antennas, a PXI chassis and a host computer. The PXI chassis is embedded with three 5624R IF digitizers; the three logarithmic cycle antennas are arranged around a piece of to-be-detected equipment to acquire and measure ambient electromagnetic radiation signals in real time and the signals are inputted into the three 5624R IF digitizers respectively; the 5624R IF digitizers perform programming through the LabVIEW FPGA module on the LabVIEW software platform and convert the simulation signals measured by the logarithmic antennas into digital signals; and the data processed by the FPGA are transferred into the host computer; therefore, real-time visualization of environmental data is realized. The invention integrates the hardware equipment, the software framework and the advanced algorithm organically and deeply analyzes and studies the complex testing mechanism of the integrated electric propulsion system so as to improve the testing speed and precision in a complex environment.

The invention discloses a method for measuring mid-span deflection on the basis of a bridge mid-span strain, and relates to the technical field of bridge deflection. The method comprises a strain sensor and a strain demodulation instrument, wherein the strain sensor is installed on the bottom of the bridge mid-span; and the strain demodulation instrument is connected with the strain sensor and isinstalled on a pier or the ground. The method for measuring the deflection comprises the following steps that: 1) applying a concentrated load to the bridge mid-span, and through the strain sensor andthe strain demodulation instrument, obtaining the bridge mid-span strain [Epsilon]L / 2; 2) applying the concentrated load which is the same with 1) to the bridge mid-span, and measuring bridge mid-span strain WL / 2; 3) substituting the strain and the deflection measured in 1) and 2) into WL / 2=K[Epsilon]L / 2 to solve a K value, wherein K is a coefficient; and 4) after the K value is calibrated, according to the [Epsilon]L / 2 value measured by the strain sensor and the strain demodulation instrument and the above formula, carrying out calculation to obtain the mid-span deflection. The method has the advantages of being convenient and quick in obtaining the mid-span deflection, and can be widely applied to the measurement of the static and dynamic deflection of the bridge mid-span.