245 results about "Labview software" patented technology

The invention discloses an acoustic signal based device and method for detecting gas pipeline leakages. The detection device comprises an acoustic sensor group, a signal conditioner, an analog-to-digital converter, a data transmission medium and a central control computer. The detection method comprises that acoustic sensors are installed on a pipeline to be tested to collect signals, collected acoustic signals are subjected to signal conditioning through the signal conditioner, then voltage signals are converted into digital signals through the analog-to-digital converter, converted digital signals are transmitted to the central control computer through the data transmission medium, and an acoustic signal display, filtering, feature extraction and leakage judgment program which is written through LabVIEW software is installed in the central control computer. The device and the method have the advantages of being low in cost, high in device sensitivity, high in adaptability and the like.

The invention discloses a power transmission line mountain fire tripping test platform data full-automatic collecting and controlling method. A voltage adjuster power supply is started, and a voltage adjuster adjusts power transmission line voltage to a power transmission line voltage level to be simulated; measured values of voltage at the high-voltage sides of a transformer and a leakage current collecting device are transmitted to a conditioning circuit and are converted into digital signals which are then transmitted to a data collecting card; current and voltage data collected by the data collecting card are transmitted to a computer through a PCI bus, through analysis of power transmission line mountain fire tripping test soft developed based on LabView software installed in a computer, the leakage current and the power transmission lien voltage data of a power transmission line mountain fire tripping test platform are obtained; and after burning is stable, a power transmission line discharging process is observed and simulated. Data such as temperature, fuel weight, smoke concentration, flame conductivity, electron ion concentration in flame, wind speed, wind direction and current and voltage of a transmission line during power transmission line mountain fire tripping testing can be collected automatically, accurately and completely.

The invention relates to a labview-based aeroengine ground stand test monitoring system, used for monitoring states in an aeroengine stand test, and comprises setting control parameters, sending control instructions, receiving and displaying state parameters in real time, and storing and analyzing experiment data. The system comprises a data collector and a computer with a labview exploitation platform. The system utilizes a serial port communication method to avoid data loss in high speed collection and data transmission processes, reliably controls an engine, and can store and analyze experiment data. The system can be used for state monitoring and performance analysis in an aeroengine preresearch phase ground green test process, and is an aeroengine ground green test monitoring system with complete functions.

The invention relates to a non-destructive detection method for the hardness of a pear. The non-destructive detection method comprises the following steps: measuring a plurality of different types of hyperspectral images of the pear by a hyperspectral imaging system at a visible-near-infrared waveband, correcting by black and white versions, converting the spectral response intensity of each point in the hyperspectral image into unified 0-100% reflectivity images, extracting and coloring the brightness of the image by Labview software, separating different brightness areas, then selecting 10 different points on the same-color area for averaging to represent the reflectivity of the whole pear, combining a reflectivity curve of the pear to extract reflectivity information of each waveband, extracting a characteristic waveband by a PCA, measuring an actual value of the hardness of the pear by a national standard method, establishing a regression model by a PLS algorithm, obtaining various regression equations, and according to the regression equations, calculating the hardness of the pear by measuring a spectrogram of the measured pear. The non-destructive detection method can be widely applied to quality detection of the pear, and the detection process is convenient, fast, non-destructive and accurate.

The present invention relates to a modularized semi-physical simulation system of a spacecraft orbit attitude. The modularized semi-physical simulation system of the spacecraft orbit attitude comprises a work control machine, a space mission load simulator, a real time simulator and an orbit attitude control comprehensive treatment system. LabVIEW and Veristand software are installed and operated on the work control machine, and development of a user-defined module oriented to the spacecraft orbit attitude is performed through the LabVIEW software; the developed user-defined module is deployed in the real time simulator through the Veristand software, and the association of input or output data among modules is completed; data acquisition and sending are completed by operating the real time simulator; and aiming at the mission load of the space mission load simulator and the engineering requirement of the semi-physical simulation, the orbit attitude control comprehensive treatment system (6) is configured to resolve the controlled quantity of the orbit and the attitude according to received real time data. The modularized semi-physical simulation system of a spacecraft orbit attitude has high simulation real time, high modularity and high integration level, and is applicable to semi-physical simulation oriented to a spacecraft orbit attitude.

The invention provides a constant width film stretching device combined with X-ray scattering, and an experimental method thereof. The device employs two Yaskawa servo motors to drive a ball screw to stretch a sample. The rotation of the motors is controlled by a Labview software. One end of the device is configured to a tension sensor for tracking tension change during a stretching process. During the stretching process, scissor mechanism fixtures are employed perpendicular to the stretching direction, so as to guarantee that the width of the sample can be kept constant during the stretching process and chuck points move uniformly along with the sample. The device employs a forced nitrogen stream to equalize temperature distribution in a sample cabin and reduce thermal degradation of the sample at a high temperature. Two temperature monitoring points are pre-set in the sample cabin. The temperature is precisely controlled by the temperature controller. The device has the advantages of easy disassembly and assembly and the like, is very suitable for combination with synchrotron radiation line stations, and is a very good device for studying the relationship between a structural evolution behavior and the film properties in film stretching and processing.

The invention relates to a multiple-antenna measurement system and method based on a network analyzer and an RF (radio frequency) switch. According to the invention, the RF switch in a time-domain platform and the network analyzer in a frequency-domain platform are effectively combined. On the premise of having the advantages of frequency domain measurement, the system can be used for utilizing remote control to realize unmanned measurement and avoiding man-made interference in a measurement process on one hand, and can be used for realizing automatic measurement based on a labview software platform and effectively improving the measurement efficiency on the other hand.

The invention relates to a multi-functional transcranial magnetic stimulator. The multi-functional transcranial magnetic stimulator mainly comprises a high-voltage pulse power supply, a myoelectricity acquisition device and a temperature measurement device which are connected to a data acquisition card respectively, wherein the data acquisition card is connected to Labview control software of a microcomputer; and the high-voltage pulse power supply is connected with a stimulation coil. By the multi-functional transcranial magnetic stimulator, a high-voltage pulse generator is controlled to act on the coil through the labview software, so that various kinds of stimulation such as magnetic stimulation single pulse, repetitive pulse, random pulse and train pulse can be realized; the temperature measurement device is combined with the Labview software, so that the temperature of the coil can be acquired and alarm can be controlled; and the Labview software is combined with the myoelectricity acquisition device, so that myoelectricity signals can be acquired. In addition, the multi-functional transcranial magnetic stimulator also has multiple additional functions of database management, report printing, remote control, data communication and the like and can be widely used for diagnosis and treatment in psychiatry departments, neurology departments and laboratories.

The invention discloses a virtual machine actual electricity simulation system for a rotary guiding executing mechanism, which comprises an IPC (Industrial Personal Computer), an electric control device, a measuring device and a rotary guiding executing mechanism, wherein the IPC comprises a guiding simulator, a data collecting module and an interface communication module; the electric control device comprises a motion control card and a data collecting card; the measuring device comprises a sensor group; the rotary guiding executing mechanism comprises a motor module and an executing mechanism module; and the guiding simulator is used for completing the simulation of the guiding and drilling of the rotary guiding executing mechanism. The invention further discloses a virtual machine actual electricity simulation method for the rotary guiding executing mechanism. The method comprises the following steps: a LabVIEW software is taken as a main body, and a SolidWorks software and a MatLab software are combined with the LabVIEW, so as to realize the simulation. According to the invention, the virtual reality technology is used for completing the design, analysis, debugging and analog simulation of the rotary guiding executing mechanism in a unified virtual environment, so that the development cycle of products is shortened, and the simulation system and method can be applied to various rotary guiding executing mechanisms.

The invention discloses a field detection system for detecting the partial discharge of a cable and a joint, which comprises a hardware device and a software system. The hardware device comprises a broadband differential current sensor, a signal conditioning module and a data acquisition card. The broadband differential current sensor consists of a magnetic core, a Rogowski coil, a filtering and sampling unit and an electromagnetic shielding box. The signal conditioning module comprises a trigger signal circuit and an amplifier. The software system is labVIEW software in a virtual instrument technology. Signals are acquired from both ends of the cable and the joint by the broadband differential current sensor; after passing through the sensor, the signals enter the signal conditioning modules to be conditioned and amplified and then are sent into the data acquisition card so that analog signals are converted into digital signals; and the digital signals are sent into an internal memory of a computer to be subjected to anti-interference treatment in real time by a PCI (Peripheral Component Interconnect) bus; data subjected to interference removal is written into a database; and after repeated acquisition, the data is extracted from the database to carry out spectra analysis and data report so as to know partial discharge information of the cable and the joint and judge whether the partial discharge hidden danger exists or not.

The invention provides an extruding and drawing device for in-situ structure detection in combination with the scattering of X rays and an experimental method thereof. The device comprises two parts, namely a vertical extruding machine and a drawing device. The rotation of a screw of the vertical extruding machine and the lifting of a machine head of the vertical extruding machine are both controlled by a high-precision servo motor. The drawing device adopts a double-chamber structure, and a group of roller wheels driven by the high-precision servo motor are arranged in each chamber to realize the drawing or the traction of extruded samples. All the motor movement is under integrated control of Labview software. The distance of the two groups of roller wheels of the drawing device is continuously adjustable by a lead screw, so that the requirements of different drawing modes and different drawing speeds can be met. The temperature control of the two chambers of the drawing device is independent to meet the requirements of simulating of complex temperature fields. The device disclosed by the invention can be used for performing the in-suit study on the structural evolutionary process of macromolecules under real extruding and drawing processing conditions in combination with the scattering of the X rays. The device is a good device for studying the relationship of structure evolution action and the processing conditions in the extruding and drawing process of a high molecular material.

The invention discloses a falling weight type nut mechanical characteristic parameter testing experiment table. LabVIEW is adopted as a software platform for implementing a detection and control process, and the experiment table is used for detecting mechanical hull breaking characteristics of nut products. The experiment table comprises a high-speed camera, a falling weight experiment table, a data acquisition system and a PC. The falling weight experiment table serves as a carrier, an analogue signal acquired by a sensor is transmitted to the PC through the data acquisition system, a program of the PC (upper computer) is written by virtue of the software LabVIEW, filtering compensation conditioning is performed on the signal, and practical mechanical characteristic parameters such as hull breaking impact force, magnitudes of speed before and after impact and an acceleration, hull breaking energy, hull breaking power and an impact height are finally calculated by virtue of a LabVIEW software environment, and are directly fed back in form of oscillogram. The experiment table is simple in structure, high in automation degree and stable and reliable in performance, and an important theoretical basis is provided for research and development of hull breaking and nut extraction equipment for agricultural products such as nuts.

The invention relates to a sub-wavelength super-resolution digital holographic imaging system based on microspheres. The sub-wavelength super-resolution digital holographic imaging system based on microspheres comprises an automatic hologram collecting and controlling module, a digital hologram recording module, a digital hologram preprocessing module, a hologram numerical value analyzing and processing module and a phase contrast image displaying module, wherein the exposure time and the image collecting speed are controlled by utilizing Labview software through the automatic hologram collecting and controlling module; the digital hologram recording module comprises a laser device, a to-be-tested sample and an optical device for forming a hologram, and the to-be-tested sample performs microsphere spreading at the early stage; acetone or water can be used for diluting microspheres; a small amount of diluted microsphere solution is dropped onto the to-be-tested sample by a drip tube, and stands until acetone or water is volatilized completely so as to complete the single-layer spreading of the microspheres. According to the invention, micro fine structures are amplified twice by adopting the microspheres and a microobjective, so that the micro nano structure can be subjected three-dimensional phase contrast imaging; the horizontal resolution can break through the diffraction limit, and the system is simple in structure, and is low in cost.

The invention provides a three-degree-of-freedom electromagnetic interference automatic test device and a three-degree-of-freedom electromagnetic interference automatic test method. The device comprises a three-degree-of-freedom platform, a computer and a data acquisition and processing unit. The method comprises the following steps: establishing a three-degree-of-freedom supporting platform; fixing an electromagnetic interference test instrument on an X-axis supporting rod; connecting a PX1 data acquisition card with the electromagnetic interference test instrument; connecting a PCI-7344 control card with a motor control unit; setting the limit positions of the X axis, the Y axis and the Z axis; after the test starts, powering on and preheating the tested equipment; initializing the three-degree-of-freedom test device; changing the position of the electromagnetic interference test instrument according to the sequence of the X axis, the Y axis and the Z axis; transmitting the test data of the electromagnetic interference test instrument to the PX1 data acquisition card through a PXI bus; and transmitting the test result to a frequency spectrum analysis unit of the computer. Due to the device and the method, three motors are controlled by LabVIEW software, so that automation of the electromagnetic interference test is realized, the test time and the test cost are saved, and the test accuracy is improved.

The invention discloses a dynamic wind power generation simulation experiment system. Man-machine interaction, blower fan control, parameter setting and information consultation are realized through built-in LABVIEW software in a network control system module; a PLC main control system module is used for receiving information of the system module and controlling operation of the system module; a yawing pitch variation system module is used for carrying out yawing control, pitch distance adjustment, pitch angle acquisition and abnormality protection; a wind mill power generation system simulation module is used for carrying out wind speed adjustment and rotating speed control; a flow variation system module is used for carrying out electric power transformation, power control, torque control and power factor adjustment; a detection system module is used for carrying out digital quantity acquisition and analog quantity acquisition, a safety protection system module is used for realizing strong wind protection, parameter off-limit protection, voltage current protection, start and shutdown protection and emergency shutdown protection for a set, and a touch screen module is used for realizing real-time display of hand-operated input command and information. The dynamic wind power generation simulation experiment system is convenient to operate and further has an advantage of excellent performance.

The invention discloses non-contact LED junction temperature measurement method and device. The method includes: placing an LED array in a thermostatic tank, using a constant current source to drive the LED array to emit light, regulating set temperature of the thermostatic tank, using a CMOS (complementary metal-oxide-semiconductor) industrial camera with an imaging lens to capture images of the LED array at different set temperatures, transmitting the images to a PC (personal computer), using LabVIEW software to process the captured images and calculate relative radiation intensity to obtain the LED relative radiation intensity corresponding to each temperature, and fitting and calibrating to obtain distribution relation between LED junction temperature and the relative radiation intensity. The non-contact LED junction temperature measurement device applying the relation comprises the CMOS industrial camera with the imaging lens and an image processing system. The image processing system processes the captured images of an LED and calibrates the relation, and the LED junction temperature can be obtained. The measurement method and device are fast, accurate, simple and handy and need no contact with pins of the LED.

The invention discloses a solar cell classification method based on LabVIEW and belongs to the technical field of solar cell classification. The method is characterized by carrying out processing and analysis on the collected solar cell images by adopting the image coordinate transformation technology, color image segmentation technology, color image HIS spatial analysis technology, and image processing technology and the like; extracting image information of H/S/I plane of the images; and carrying out customized sample parameter comparison and similarity calculation on the obtained useful information and classifying solar cells according to the customized requirements of manufacturers. According to the solar cell classification method based on LabVIEW, through the machine vision detection technology, color images of the solar cells are collected quickly, and then, the images are subjected to information extraction and analysis operation by utilizing the LabVIEW software program, so that the solar cells can be classified online in real time according to the customized requirements of the manufacturers, and the method is stable and efficient, standard in classification and simple and quick.

The invention relates to a circuit device based on a disturbed magnetic field detection instrument and discloses a circuit system based on the disturbed magnetic field detection instrument. A total circuit of the detection system mainly consists of an excitation source module, a sensor module, a signal modulation circuit, a phase shifting circuit, a correlator circuit, an analog-to-digital (A/D) conversion circuit and a computer display system. The visual detection system capable of obtaining detection signal amplitude values and phase information is designed on the basis of unique advantages of Labview software in the respects of value analysis, image display, programming and the like by utilizing mutual correlation principles and an A/D data collecting card. The detection circuit has a good amplification effect on weak signals and simultaneously has a good inhibition effect on the noise. The circuit also has the advantages that the amplitude value and the phase of the defect signals can also be simultaneously detected, and the detection and characterization on the metal surface crack defect characteristics can be perfectly realized.

The invention relates to an energy consumption measuring method of Android mobile phone based on Intel Atom, belonging to the technical field of measuring energy consumption of mobile phone platform. The method comprises the following steps: installing a DAQ signal collector in the mobile phone and measuring the DAQ; driving DAQ in an application and acquiring real-time data; analyzing the acquired measurement value in LabVIEW program; calculating the reliability of the measurement result and displaying the measurement result. An energy consumption value is read by DAQ in the invention; the software command runs the drive program, and voltage and temperature can be measured on the plate. The LabVIEW software platform can sample the energy consumption information; the final energy consumption value is analyzed by an analysis mode; in the process of running dynamic frequency modulation code, execution frequencies of a processor and a main memory are correspondingly set by the dynamic frequency modulation technology so that the dynamic frequency modulation code segment runs on the frequency which is more helpful for saving energy to the system. The invention can be used in all systems that supply the processor and are adjusted and supported by the main memory frequency, and has good simplicity and pertinency.

The invention discloses a control method for an automated manipulator arm, which comprises the following steps: 1) setting a manipulator arm body; 2) setting a LabVIEW software development platform on a PC (personal computer), and setting a superior control software based on the LabVIEW software development platform to serve as an upper computer; 3) connecting a motion control card with the PC through a PCI bus to take the motion control card as a lower computer; 4) starting the PC, entering the superior control software based on the LabVIEW software development platform, and setting the motion parameters; 5) enabling the motion control card to receive a control signal from the PC, process and execute the motion through controlling an execution mechanism; 6) enabling a monitoring mechanism to implement monitoring in the motion process of the execution mechanism and feed back the signal immediately; 7) enabling the upper computer to receive the signal of the monitoring mechanism, immediately select and adjust the motion parameters according to the content of the signal, and then send the parameters to the lower computer; and 8) repeating the steps from 5) to 7). The invention further discloses a control system for the automatic manipulator arm.

The invention relates to a peristaltic pump flow control system based on a LabVIEW fuzzy PID controller. The peristaltic pump flow control system comprises a drive circuit, a peristaltic pump, a flow sensor, a data collection card, an A/D converting circuit, a fuzzy PID controller, a D/A converting circuit, a single-chip microcomputer, and a display screen. The output end of the drive circuit is electrically connected with the peristaltic pump. The output end of the peristaltic pump is connected with the input end of the flow sensor. The output end of the flow sensor is connected with the input end of the data collection card. The output end of the data collection card is connected with the input end of the A/D converting circuit. The output end of the A/D converting circuit is connected with the input end of the fuzzy PID controller. The output end of the fuzzy PID controller is connected with the input end of the D/A converting circuit. The output end of the D/A converting circuit is connected with the input end of the single-chip microcomputer. The output end of the single-chip microcomputer is connected with the drive circuit. The fuzzy PID controller is connected with the display screen through a line. A LabVIEW software system is embedded into the fuzzy PID controller. The peristaltic pump flow control system can improve a flow control effect, the overshoot amount of the system is obviously reduced, the flow control precision is obviously improved, and a defective rate is obviously reduced.

The invention discloses a simulation method, a simulation device and a robot simulation system. The system comprises a computer system, an embedded system, a servo motion control card, a robot and a sensor module so that robot simulation can be realized. Besides, real-time feedback of LabVIEW software, LabVIEDSCW software, MatLab software, Solidworks software, SoftMotion software and the sensor module 5 is combined in the technology so that the real-time performance and the authenticity of simulation and control can be guaranteed.