Network file isolation and access control method in scripting engine

The invention provides a network file isolation and access control method in a scripting engine. The method comprises two steps that firstly security labels are embedded into network files; and secondly the scripting engine performs mandatory access control on the read files according to the security labels. By employing the method, the access control on file reading and writing by the scripting engine can be separated from an inherent discretionary access control system of an operation system, so that the network files in a local file system can be accurately separated and independently access-controlled, and finally attackers can be effectively prevented from illegally downloading secret files in network servers through network scripts on the premise of minimum manpower cost.

Detecting and warning system for preventing number plate from getting lost

The invention relates to a detecting and warning system for preventing a number plate from getting lost. The system adopts two ways of eddy current type proximity switch sensor signals to judge the state of the number plate, and comprises proximity switch sensors, a signal conversion circuit, a single-chip control circuit, an indicator light display circuit, a warning circuit, a displayer, a warner and a power supply circuit, wherein the signal conversion circuit is a voltage follower and triode driving circuit, and overcomes the defects of limited driving capacity and easy interference by signals in signals received from proximity switches; a single-chip processing chip is a single-chip AT89S52 with low cost, and satisfies all requirements of the system; a single LED and a single loudspeaker are adopted for the display circuit and the warning circuit respectively; and a 7805 chip is adopted for the power supply circuit, and converts a power supply of 12 V of a car into a power supply of ...

Method for comprehensively evaluating network performance based on subjective and objective combination evaluation

The invention relates to a method for comprehensively evaluating network performance based on subjective and objective combination evaluation, which comprises the following steps: A, selecting a comprehensive evaluation index of the network performance, collecting network performance data, and establishing a decision matrix; B, evaluating the network performance by using a subjective analysis method, and calculating the comprehensive evaluation value of the network performance; C, evaluating the network performance by using an objective analysis method, and calculating the comprehensive evaluation value of the network performance; and D, performing combined evaluation on the comprehensive evaluation values obtained by the subjective and the objective analysis methods respectively to obtainthe final comprehensive evaluation value of the network performance. The method has the advantages that probable insufficient data information content by singly using the objective analysis method isavoided ...

Mixed H2/H infinity robust fuzzy tracking control algorithm

The invention discloses a mixed H2/H infinity robust fuzzy tracking control algorithm, which comprises the step of: embedding a given trajectory to be tracked and the inner module of a controlled object interfered by the external world into a control system so as to counteract a tracking path and an unstable pole contained in a transfer function of external interference, wherein a practical nonlinear system is more completely distributed through the H2 performance index of a system and the approximate error of an output equation of a T-S fuzzy model neutron system. The mixed H2/H infinity robust fuzzy tracking control algorithm can greatly track a given trajectory on the basis of a T-S fuzzy model robust tracking control strategy and using a medium speed pulverizer in a power station as an object, can satisfy the H infinity performance index of an unknown interference suppression degree to properties, and the H2 optimization performance index in a control process, and can be used for preferably ...

Dynamic balance correcting system and method of self-adapted variable load vibrating platform

The invention relates to a dynamic balance correcting system and method of a self-adapted variable load vibrating platform and particularly relates to a self-adapted measuring and correcting method of a dynamic variable load dynamic balance system. The system comprises a vibrating platform, a photoelectric sensor, an acceleration sensor, a sensor signal processing circuit, a microprocessor and a rotary counter weight device. The rotary counter weight device is a rotary bearing controlled by a stepping motor. The vibrating signal of the vibrating platform measured by the acceleration sensor is transmitted to the microprocessor through the sensor signal processing circuit. The rotating speed signal of a main bearing of the vibrating platform measured by the photoelectric sensor is transmitted to the microprocessor through the photoelectric sensor signal processing circuit. The microprocessor calculates amplitude and phase of unbalance through the vibrating signal and the rotating speed signal ...

Wi-Fi (Wireless Fidelity)-based wireless meter reading device

The invention relates to a Wi-Fi (Wireless Fidelity)-based wireless meter reading device, comprising an embedded processor, a storage unit, a clock module, a downlink communication module, an uplink communication module and a power supply module; the clock module provides clock frequencies for the running of the embedded processor and is used for stamping a time stamp to the electric meter data; the downlink communication module is of a Modbus-RTU (Remote Terminal Unit) field bus communication manner, is connected with a plurality of intelligent electric meters to finish data interaction with the electric meter, and acquires the data of the plurality of the electric meters to the storage unit; the uplink communication module is of a Wi-Fi wireless communication manner, can automatically search and can be connected to a special Wi-Fi wireless network, and transmits the data of the electric meters, stored in a memory, to a management centre through the network. The meter reading device provided ...

Direct energy balance and coordination control system for supercritical thermal power generating unit

The invention discloses a direct energy balance and coordination control system for a supercritical thermal power generating unit. Direct energy balance and coordination control starts changing in load from the maximum speed, power generation control and boiler control are decoupled completely, and procedural randomness of overburnt or underburnt is minimized. The direct energy balance and coordination control system for the supercritical thermal power generating unit is realized by the following technical scheme that a boiler receives the input signals of a water feed control module, a fuel control module and an air flow control module and provides output signals to an energy balance signal module and a voltage compensation module; a demand limit regulator receives the input signals of the voltage compensation module, the water feed control module, the fuel control module and the air flow control module and provides output signals to a turbine monitoring module and a boiler input coordination ...

Intelligent transmitter device with embedded DeviceNet field bus interface

This invention relates to an imbedded DeviceNet spot bus interface intelligent transducer, which comprises the following: a DSP transducer circuit to translate multiple parameters into high accurate digit for process; one power circuit to translate twenty-four volt into five volt power wire 10 of spot bus 18 and to provide direct power to the transducer elements. It is characterized by the following: the said DSP transducer is connected with one DeviceNet bus interface circuit through high-speed asynchronous serial port 5; it has one digital logic circuit is connected with DSP transducer circuit and DeviceNet bus interface circuit to realize LCD control, address code and key logics.

Networked dual parallel reverse pendulum

The invention relates to a network-based double parallel inverted pendulum comprising two pendulum rods, two small cars, a spring, two motors and drivers thereof, a local control system, a remote control system and a network control system; two pendulum bodies are arranged in symmetry; the two motors drive the two small cars to conduct reciprocating movement freely along two slide rails; the two pendulum rods are hinged with the two small cars respectively through a coupling; the two pendulum rods are connected with each other through the spring; and so the invention provides a complex experimental facility which has the characteristics of multi-input, strong coupling and multivariate. The corresponding local control system platform, the remote control system platform and the network control system platform are established on the basis of the device provided by the invention. By integrating the functions into a complete set of control system software (including a server end application ...

Self-balancing vehicle control method and system, storage medium and electronic equipment

The invention relates to the technical field of self-balance vehicle control, and discloses a self-balance vehicle control method and system, a storage medium and electronic equipment, and the method comprises the steps: collecting the actual operation state data of a self-balance vehicle; estimating the Lagrange quantity of a neural network learning system; using an Euler-Lagrange equation to obtain vector field estimation of the system and calculating system state estimation; using a back propagation algorithm to update neural network parameters so as to obtain accurate estimation of the Lagrange quantity; according to the method, a PD controller with damping is designed according to the precise Lagrange quantity, precise control over the self-balancing vehicle is achieved, the dependence of controller design on a precise system model is reduced, and the robustness of the controller to an uncertain model and the adaptability of the controller to a dynamic model are improved; the learning ...

Method for converting protocol between Modbus and DeviceNet

Through RS485 bus interface, Modbus bus is connected to microprocessor. Through CAN transceiver and controller, DeviceNet bus is connected to microprocessor. Microprocessor connected to EEPROM, data and program storage builds hardware platform of protocol conversion. Using model of protocol conversion between Modbus and DeviccNet supplied by the invention realizes protocol conversion between Modbus and DeviccNet. Modbus devices in form of DeviccNet object as slave site of DeviccNet is connected to DeviccNet network.

Agreement converting method and device between MODBUS/TCP industrial Ethernet and PROFIBUS-DP bus on-the-spot

The protocol switched method includes following steps: the interface module of industrial Ethernet is used to implement MODBUS/TCP, and the communication interface module of PROFIBUS-DP master station is used to implement the field bus protocol. The soft ware in MPU is used to build unified message model and implement the protocol conversion between the MODBUSFFCP industrial Ethernet and PROFIBUS-DP field bus. The protocol conversion device is built by using following method: the MPU is connected with the industrial Ethernet interface module, the communication module of PROFIBUS-DP master station and SRAM through internal bus; the MPU is connected with an EEPROM through serial peripheral interface.

Dynamic balance detection control method based on biogeographical intelligent optimization support vector machine algorithm

The invention discloses a dynamic balance detection control method based on the biogeographical intelligent optimization support vector machine algorithm. The method comprises the following steps: (1) collecting online data, (2) inputting off-line data, (3) setting the requirement for model precision, (4) preprocessing the data, (5) judging whether a dynamic balance system model exists, (6) judging whether the system unbalance exceeds a threshold value, (7) carrying out the biogeographical intelligent optimization support vector machine algorithm with Kalman filtering, (8) establishing the dynamic balance system model, and (9) carrying out dynamic balance adjustment. According to the method, system modeling is carried out based on the support vector machine algorithm according to the small sample and nonlinearity characteristics of a dynamic balance system, penalty factors and kernel function parameters of the support vector machine algorithm are optimized based on the biogeographical intelligent ...

Networked dual parallel reverse pendulum

The invention relates to a network-based double parallel inverted pendulum comprising two pendulum rods, two small cars, a spring, two motors and drivers thereof, a local control system, a remote control system and a network control system; two pendulum bodies are arranged in symmetry; the two motors drive the two small cars to conduct reciprocating movement freely along two slide rails; the two pendulum rods are hinged with the two small cars respectively through a coupling; the two pendulum rods are connected with each other through the spring; and so the invention provides a complex experimental facility which has the characteristics of multi-input, strong coupling and multivariate. The corresponding local control system platform, the remote control system platform and the network control system platform are established on the basis of the device provided by the invention. By integrating the functions into a complete set of control system software (including a server end application ...

Coal-fired power plant furnace chamber flame judging method based on double images

The invention provides a coal-fired power plant furnace chamber flame judging method based on double images. The flame judging method includes the following steps that (1), the two furnace chamber flame images with the same time and different angles are obtained; (2), with the barycentric coordinate of a furnace chamber flame normal state tangent circle as the datum, the barycenter offset distances, in the planes where the flame images are located, of the flame images are respectively calculated; (3), the actual barycenter offset distance of furnace chamber flames is calculated according to the two barycenter offset distances; (4), the actual barycenter offset distance is compared with a preset effective area, and if the actual barycenter offset distance exceeds the preset effective area, an early warning is given. The two flame images are selected for analysis, so that the combustion state of the furnace chamber flames is judged from different angles, real-time operating characteristics ...

On-site intelligent unit supporting industrial communication protocol and operating method thereof

This invention relates to a spot intelligent unit and its operation method supporting industry communication network agreement, which comprises control unit and communication port module. The communication port module realizes the MODBUS/TCP industry Ethernet agreement or DeviceNet spot bus agreement or Profibus-DP spot bus agreement. The control unit has a microprocessor connected with A/D converter, D/A converter through light couple device, wherein its switch input, output and A/D converter and D/A converter are connected with the control subject.

Circumferential oscillation mechanism with adjustable level of multi-shaft support amplitude

The invention discloses a circumferential oscillation mechanism with adjustable level of multi-shaft support amplitude, and the circumferential oscillation mechanism comprises a drive shaft system, two driven shaft systems, a base, a rocker panel, a motor, a driving belt, bearing pedestals and belt wheels, wherein upper ends of the drive shaft system and the two driven shaft systems are connected with the rocker panel; lower ends of the drive shaft system and the two driven shaft systems are installed on the base through bearings and the bearing pedestals; the motor is fixed on the base; an output shaft of the motor is connected with the belt wheels; the belt wheels are connected with a lower end of the drive shaft system through the driving belt. By adopting the rigid connection, an oscillatory system is high in reliability; a mechanism with variable vibration amplitude is obtained by changing positions of an upper shaft positioning hole and a lower shaft positioning hole of each shaft ...

Printing machine remote fault monitoring system and method

The invention discloses a printing machine remote fault monitoring system and method. The system comprises a field equipment end, a monitoring service station and a remote access end. The field equipment end comprises a printing machine and an industrial personal computer, wherein the printing machine and the industrial personal computer are in a printing workshop, and the industrial personal computer collects real-time data from the printing machine through the Ethernet. The monitoring service station comprises a TCP server, a remote Web server and a database. The remote access end comprises an authorized user and a local and remote expert browser end. The industrial personal computer serves as a TCP client end and sends the real-time data to a TCP server module of the remote monitoring service station, and the remote Web server communicates with the remote access end through the Internet/Intranet. According to the system and method, field data are collected through a TCP/IP, a monitoring ...

Detection protection system preventing mis-starting of electric bicycle

The invention relates to a detection protection system preventing mis-starting of an electric bicycle. The detection protection system comprises a pressure sensor which is mounted at the position of a saddle of the electric bicycle and used for detecting the pressure of the saddle, the pressure sensor is connected with a signal conversion circuit, the signal conversion circuit is connected with a single-chip microcomputer control circuit, and the single-chip microcomputer control circuit is connected with a relay drive circuit. Signals of the pressure sensor pass through the signal conversion circuit and then enter the single-chip microcomputer control circuit, and the single-chip microcomputer control circuit drives a relay according to set logic to control on and off of a starting circuit of the electric bicycle. A power supply circuit supplies power to all circuits of the system. The detection protection system preventing mis-starting of the electric bicycle provides starting safety ...

Obtaining method of control object complete phase step response signals

The invention relates to an obtaining method of control object complete phase step response signals. By using the method, complete phase step response signals can be obtained through the response of a control object on small incremental phase step signals. The modeling for the control object according to the complete phase step response signals is compared with the modeling for the control object by means of the response of the control object on the small incremental phase step signals. The precision of the former is higher than the precision of the latter. The larger the inertia constant in a control object first order inertia and time lag modelis, the larger the error of the modeling is. The invention has good practical meaning and application foreground for improving the control object modeling precision and the dynamic performance of a control system.

High-precision on-line dynamic balance detection control system and method

The invention discloses a high-precision on-line dynamic balance detection control system and method. The high-precision on-line dynamic balance detection control system comprises a rotating machine, a vibration sensor, a rotation speed sensor, an imbalance adjusting device, a binuclear embedded type control module and an upper computer. The method includes the first operating step of the first layer of network dynamic balance control, wherein a DSP core of the binuclear embedded type control module collects data of the vibration sensor and the rotation speed sensor in real time, calculates an output control signal and controls the motion of the imbalance adjusting device; the second operating step of the second layer of network dynamic balance control, wherein an ARM core of the binuclear embedded type control module is in communication with the upper computer through a wireless transmitting and receiving module, accurate modeling is carried out on a control model of the rotating machine ...

Method for optimizing Pareto multiple target deployment of industrial wireless sensor network

The invention discloses a method for optimizing Pareto multiple target deployment of an industrial wireless sensor network, and relates to the field of industrial automation and intelligent computing. A new communication model is defined for the two-layer cluster structure industrial wireless sensor network commonly used in the industry, the method for optimizing the Pareto multiple target deployment is provided, the cluster head node deploying position is optimized through the Pareto human study optimization algorithm, and the multi-objective optimization of reliability, real-time performance, economical efficiency and expansibility of the industrial wireless sensor network is achieved by providing redundant cluster heads, optimizing and limiting the hop count to a base station from a sensor node, reducing the number of the cluster heads, balancing the cluster head charge number, and reserving network access ports needed by mobile nodes and upgrading and maintaining of a system.

Communication adapter of connecting low voltage electric appliance field bus

Ocean autonomous cruise path planning method and control system for water surface and underwater dual-mode unmanned vehicle

The invention belongs to the technical field of ocean cruise, and discloses a water surface and underwater dual-mode unmanned vehicle ocean autonomous cruise path planning method and a control system, and the method comprises the following steps: S101, training an Actor-Citric-based reinforcement learning network model; s102, planning a Durbin path based on a reinforcement learning network model according to the situation information and the target coordinates, and then controlling the aircraft to sail according to the Durbin path; s103, the Actor network outputs the optimal action of the vehicle according to the incomplete observation characteristics acquired from the current environment, and then controls the vehicle to sail to a new state; s104, after the aircraft reaches a new state, complementing the current incomplete observation features to obtain complemented features; meanwhile, reward return is obtained; s105, updating parameters of the Critic network by using a time sequence ...

Method for comprehensively evaluating network performance based on subjective and objective combination evaluation

The invention relates to a method for comprehensively evaluating network performance based on subjective and objective combination evaluation, which comprises the following steps: A, selecting a comprehensive evaluation index of the network performance, collecting network performance data, and establishing a decision matrix; B, evaluating the network performance by using a subjective analysis method, and calculating the comprehensive evaluation value of the network performance; C, evaluating the network performance by using an objective analysis method, and calculating the comprehensive evaluation value of the network performance; and D, performing combined evaluation on the comprehensive evaluation values obtained by the subjective and the objective analysis methods respectively to obtain the final comprehensive evaluation value of the network performance. The method has the advantages that probable insufficient data information content by singly using the objective analysis method is ...

Strip steel thickness feedforward control method based on strip steel performance detection

The invention discloses a strip steel thickness feedforward control method based on strip steel performance detection. The method comprises the steps that (1) the models of a performance detector 6 and a thickness gauge 7 are determined; (2) the performance detector and the thickness gauge are installed; (3) a current steel coil thickness control coefficient is obtained; (4) strip steel thickness feedforward control information is obtained; (5) the strip steel thickness feedforward control information is stored; (6) the strip steel thickness feedforward control quantity is calculated, wherein in the rolling process of corresponding strip steel segments, corresponding deformation resistance fluctuating values and thickness fluctuating values are read from a storage unit, and the rolling control quantity is calculated according to a strip steel thickness feedforward control algorithm; (7) real-time thickness feedforward control is conducted, wherein the rolling control quantity is sent to ...

3D photoelectric sensing localization system

The invention discloses a 3D photoelectric sensing localization system, which belongs to the indoor localization field, and is used for formation flight of model plane multi-rotary vane aircrafts, and condition of movement position of a robot in space and other contiguous robots can be determined. The system comprises a transmitter, a receiver, a network synchronizing controller, an information integrator and a display. The timing sequence of a transmitter is controlled by the transmitter. A spot light source in space sends a synchronous signal through the network synchronizing controller, The spot light source is projected to each CCD plane of the receiver through a cylindrical optical lens of the receiver to form a linear light which is vertical to a CCD linear array, the position information of the projection is obtained on CCD, and the projection position of three groups of CCD can determine three dimensional position of the spot light source. The coordinate of the spot light source ...

Lateral pushing type recovery method and device for autonomous submersible

The invention belongs to the technical field of autonomous submersible recovery, and particularly discloses a side-pushing type recovery method and device for an autonomous submersible, and the recovery method comprises the following steps: step 1, a mother ship releases a recovery boat with a mooring rope to the water surface, and controls the recovery boat to advance towards the autonomous submersible; 2, when the distance between the recovery boat and the autonomous submersible reaches the set distance, the pose of the recovery boat is adjusted, and then a mechanical claw at the front end of the recovery boat grabs the autonomous submersible from the side face; 3, the mother ship recycles the mooring rope, and the mooring rope drives the recycling boat and the autonomous submersible to move to the mother ship; according to the side-pushing type recovery method and device for the autonomous submersible, the autonomous submersible can be flexibly, efficiently and safely recovered.

Method for correcting shape model online based on fixed-length sampling

The invention relates to a method for correcting a shape model online based on fixed-length sampling. The method comprises the following steps of: (1) determining types of a convexity instrument and a shape instrument; (2) determining the length of the fixed-length sampling; (3) mounting the convexity instrument and the shape instrument; (4) acquiring the coefficient initial value of the current steel coil model; (5) rolling and carrying out fixed-length sampling; (6) reorganizing data according to time sequence; (7) generating a data sample; and (8) correcting the model online. By adopting the method provided by the invention, the accuracy of the shape model can be improved, thus the shape quality of strip steel is improved.

Computer network platform of supercritical thermal power generating unit

The invention discloses a computer network platform of a supercritical thermal power generating unit, which realizes the bidirectional communication of a master control system and a plurality of devices, reduces the maintenance, repair and system expanding complexity and ensures the safety reliability and high fault tolerance performance. The computer network platform of the supercritical thermal power generating unit comprises a switchboard, a master switchboard and a minicomputer which are connected in sequence as well as a magnetic tape unit and a magnetic tape array which are connected to the minicomputer; in addition, a webmaster workstation, an information processing module, a database maintenance module, a network server, a mail server and a firewall are also connected to the master switchboard.

Guide rail type circumferential oscillating mechanism stepwise adjustable in amplitude

The invention discloses a guide rail type circumferential oscillating mechanism stepwise adjustable in amplitude. The guide rail type circumferential oscillating mechanism comprises a rocking plate, guide rail sliders, extending square-shaped guide rails, a bearing holder, a lower frame and an eccentric adjusting mechanism; the lower end of the eccentric adjusting mechanism is mounted on the lower frame by use of a bearing and the bearing holder, while the upper end of the eccentric adjusting mechanism is connected with the rocking plate; the extending square-shaped guide rails are divided into upper and lower two layers; the rocking plate is connected with the upper-layer guide rails of the extending square-shaped guide rails by use of the guide rail sliders; the lower-layer guide rails of the extending square-shaped guide rails are fixed on an upper frame; the guide rail sliders are capable of sliding relatively to the upper-layer guide rails, and the upper-layer guide rails are capable ...

Industrial wireless network access industrial Ethernet, multi-protocol gateway of field bus and protocol conversion method

The invention relates to a multi-protocol gateway and protocol conversion method accessing industrial radio network into MODBUS/TCP industrial Ethernet and PROFIBUS-DP field bus based on IEEE802.15.4a. The multi-protocol gateway comprises microprocessor, MODBUS/TCP main station, IEEE802.15.4a radio main station, PROFIBUS-DP slave station, extent SDRAM memory and FLASH memory, RJ45 network port, 486 physical layer interface, USB interface. The circuit connection style is that the microprocessor is positioned at center; the DM9161EP Ethernet physical layer interface chip extends via MDIO interface; the PROFIBUS-DP protocol chip SPC3 connects via internal bus, the NA1TR8 radio protocol chip connects the circuit via SPI bus; the USB interface extends from the circuit. The protocol conversion method of multi-protocol gateway is controlled by microprocessor for implementing protocol conversion among three networks. The invention implements wired/wireless Heterogenous control network gateway fitting ...

Conversion method between multiple protocol bus

The invention relates to a converting method between multiple protocol buses. The method uses a microprocessor, a DeviceNet, a Profibus and the physical layer part circuit and microprocessor program of a Modbus/TCP network protocol to receive different protocol data, store them in the microprocessor, adopts system protocol converting method to realize the protocol converting between multiple protocols. While the task scheduling method using real time multi-task operation system is adopted in the whole protocol converting process, consequently, the real time interaction and updating control of multiple protocol converting data is realized.

Method and apparatus for protocol switch between MODBUS/TCP industrial Ethernet and device network field bus

Conversion method between multiple protocol bus

The invention relates to a converting method between multiple protocol buses. The method uses a microprocessor, a DeviceNet, a Profibus and the physical layer part circuit and microprocessor program of a Modbus/TCP network protocol to receive different protocol data, store them in the microprocessor, adopts system protocol converting method to realize the protocol converting between multiple protocols. While the task scheduling method using real time multi-task operation system is adopted in the whole protocol converting process, consequently, the real time interaction and updating control ofmultiple protocol converting data is realized.

Unmanned sailboat area position keeping method and system

The invention discloses an unmanned sailboat regional position keeping method and system, and the method comprises the steps: determining whether an unmanned sailboat is in a regional position keeping range or not according to the real-time position of the unmanned sailboat and regional position keeping information; according to the real-time position, the area position keeping information and the wind direction of the environment, whether the area position keeping range is in the forbidden area of the unmanned sailboat or not is determined. And if the area position keeping range is in the forbidden area of the unmanned sailing ship, the unmanned sailing ship sails into the area position keeping range in a Z shape. If the area position keeping range is not in the forbidding area of the unmanned sailboat, the unmanned sailboat calculates an expected course angle by using an integral LOS algorithm, and then adjusts the posture of the sail according to the difference value between the expected ...

扫描探针显微镜中压电执行器模型参数标定和非线性校正方法

The invention relates to a piezoelectric executer parameter calibration and nonlinear correcting method in scanning probe microscope. (1) scans standard grating sample, acquires the SPM image; (2) uses the piezoelectric executer model parameter calibration software to acquire the piezoelectric executer model parameter, (3) carries on data transfer before nonlinear online correcting (4) carries on nonlinear correction online. The invention is based on the piezoelectric executer model parameter calibration software of standard grating sample SPM image, in order to acquire the model parameter of the piezoelectric executer, carries on piezoelectric executer nonlinear correction, eliminates the SPM image character torsion, and reduces the complexity of the SPM product calibration.

MODBUS/TCP工业以太网和设备网现场总线间的协议转换方法和装置

The invention discloses the method and apparatus for the protocol conversion between the MODBUS/TCP industrial Ethernet and the device network on site bus line, wherein an industrial Ethernet interface module is used for accomplishing the MODBUS/TCP industrial Ethernet protocol, a device network host node communication adapter module is used for realizing the device network on site bus line protocol, the software in the microprocessor is responsible for building-up a uniform message model, realizing the application layer protocol conversion between the MODBUS/TCP industrial Ethernet and the device network on site bus line.

Machine vision-based intelligent detection method for surface defect of bottle cap

The invention discloses a machine vision-based intelligent detection method for the surface defect of a bottle cap. The method comprises the following steps of: (1) acquiring the image information of a qualified bottle cap; (2) performing range positioning and characteristic parameter extraction on the surface image of the bottle cap; (3) respectively storing all the acquired parameters of the surface image of the bottle cap in different arrays; (4) judging whether the acquisition times of the bottle cap reaches the preset acquisition times; (5) counting the average value, the upper limit value and the lower limit value of all the parameters, and taking the difference of the upper limit value and the lower limit value as an error allowance range; (6) acquiring the image information of the bottle cap to be detected and exacting characteristic parameters; and (7) judging whether errors corresponding to the parameters exist in the error allowance range, and eliminating the unqualified bottle ...

Method for manufacturing network PID controller

The invention discloses a method for manufacturing a network PID controller, which comprises the following steps: on an established network induction time delay model, deducing the gain range of the parameterized PID controller in view of a type of time lag objects, analyzing the relation between gain and time lag, giving out off-line optimizing algorithms for the gain under different model parameters by using the genetic algorithm, and finally, selecting the on-line time delay statistical model and dispatching gain in real time. The invention provides a method, which is used for manufacturing an advanced network PID controller which is independent of the object model and has generalized predictive control performance, for automatic systems in large-scale power stations. By using the frequency domain robust theory and the generalized predictive control theory, the invention provides a method for manufacturing an advanced network PID controller which is independent of the object model and ...

Industrial wireless network access industrial Ethernet, multi-protocol gateway of field bus and protocol conversion method

The invention relates to a multi-protocol gateway and protocol conversion method accessing industrial radio network into MODBUS/TCP industrial Ethernet and PROFIBUS-DP field bus based on IEEE802.15.4a. The multi-protocol gateway comprises microprocessor, MODBUS/TCP main station, IEEE802.15.4a radio main station, PROFIBUS-DP slave station, extent SDRAM memory and FLASH memory, RJ45 network port, 486 physical layer interface, USB interface. The circuit connection style is that the microprocessor is positioned at center; the DM9161EP Ethernet physical layer interface chip extends via MDIO interface; the PROFIBUS-DP protocol chip SPC3 connects via internal bus, the NA1TR8 radio protocol chip connects the circuit via SPI bus; the USB interface extends from the circuit. The protocol conversion method of multi-protocol gateway is controlled by microprocessor for implementing protocol conversion among three networks. The invention implements wired/wireless Heterogenous control network gatewayfitting ...