257results about How to "Realize synchronous acquisition" patented technology

The invention discloses a non-invasive multipath pulse wave detection device, which comprises at least two sensors, each of the sensors is provided with a fixing device thereon and connected to a signal processing unit, and the signals detected by the sensors are processed and stored by the signal processing unit. The invention synchronously collects pulse waves and wave velocities in a multipathmanner and uses a wave form processing technique for the pulse wave collecting points of the different sites of a human body, is capable of analyzing the wave velocities and the wave forms aiming at the different sites of the human body, and provides more specific information reflecting cardiovascular system states for clinic real-time monitor.

The invention discloses an electrified tester for a zinc oxide arrester, and relates to an instrument for detecting alternating-current parameters of a metallic oxide arrester in an electrical power system in the process of charged running. The electrified tester comprises a master machine and a slave machine; a current sensor lead wire, a current sensor unit, a program control amplification unit, a current signal processing control unit and a wireless signal receiving module are connected sequentially and are connected with an upper computer; the upper computer is respectively connected with the current signal processing control unit, a liquid crystal display, a keyboard and a mouse to form the master machine; a voltage sensor lead wire, a voltage sensor unit, a voltage signal processing control unit and a wireless signal emission module are connected sequentially to form the slave machine; and the master machine and the slave machine control signals and data through wireless communication transmission. The electrified tester is suitable for detecting total leakage current, resistive current fundamental waves and triple frequency harmonic at regular intervals on the running metallic oxide arrester and checking the running performance of the metallic oxide arrester.

The invention discloses a railway infrastructure detection system. The system involves a positioning synchronization subsystem, and a rail geometry detection subsystem, a rail contour detection subsystem, a rail state detection subsystem, a rail wheel force detection subsystem, a catenary geometric parameter detection subsystem, a pantograph-catenary current collection parameter detection subsystem which are in communication with the positioning synchronization subsystem. According to the system, on the basis of the structural characteristics and operation modes of urban rail transit infrastructure, the plurality of detection subsystems are integrated on a urban rail transit electric bus, rail geometric parameters, rail contour abrasion, rail state information, rail wheel interaction force, catenary geometric parameters and pantograph-catenary current collection parameters of the urban rail transit infrastructure are synchronously collected and accurately measured, the detection efficiency is improved, the urban rail transit operation maintenance cost is reduced, and the system can be widely applied to urban rail traffic construction and operation and maintenance.

The invention discloses a degradable triple-modular redundancy computer system based on software synchronization, relates to a triple-modular redundancy computer control system, and solves the problem that the conventional triple-modular redundancy system is complicated due to addition of an arbitration module. The degradable triple-modular redundancy computer system consists of three same control computers, communication buses, high-speed communication buses and a power management module, wherein the synchronization information transfer and data exchange of the control computers are finished through the communication buses which are connected two by two; the control computers vote for sensor data and control operation results by using a 2-out-of-3 voting algorithm; high-frequency heartbeat monitoring signals of the computers are transferred by interconnecting the high-speed communication buses two by two, and real-time state mutual monitoring of the control computers is realized; the three control computers operate degradation programs, so the degradation operation of a redundancy system is realized; and the three control computers operate reconstruction programs, so the reconstruction operation of the redundancy system is realized. The arbitration module is not required to be added.

The invention discloses a machine tool health state rapid checking method. According to the method, a HuaZhong HNC-8 numerical control system is utilized, a sensor is arranged into each position that is required to be checked in a machine tool in advance, and then sampling channel information is configured in an oscilloscope sampling interface; health checking parameters are configured in a diagnosis meson interface of the numerical control system; then machining processes are selected, a circulating start button is pressed down to perform on-line sampling, and the system obtains feature values of sampling information by means of a signal analysis method; finally, comprehensive comparison with standard data is performed, health assessment of the machine tool is performed, and a result is displayed in a graphical mode. By means of the machine tool health state rapid checking method, signals of outer sensors are directly transmitted into the numerical control system through a port of the numerical control system, on-line collecting and analysis can be achieved, a mode of traditional external measurement and off-line modeling analysis is changed, and health checking efficiency, practicability and using range of the numerical control machine tool can be increased.

The invention discloses a remote laser radar calibration system. The calibration is carried out between a laser radar and a calibration device, and the calibration device is provided with a support, acalibration panel, and an adjustment device. The calibration panel is disposed on the support, and the adjustment device is used for adjusting the height and angle of the calibration panel. The adjustment device comprises a support which is provided with an upper part and a lower part, wherein the upper part is provided with a plurality of adjustment holes at different heights, and the lower partand a folding device are fixed through a connecting device. The adjustment device also comprises an inner rotating control device and an outer rotating control device, wherein the outer rotating control device is disposed between the inner rotating control device and the support, and the inner and outer rotating control devices have the same center. The scale position is read through the mutual rotation of the inner and outer rotating control devices, and the angle is adjusted. In addition, a fixed device can pass through the calibration panel, is disposed on the adjustment holes of the support in a bulged manner, and is fixed on the adjustment holes through a spiral fixing part.

The invention discloses a space-time synchronization system for laser radar and camera data. The space-time synchronization system comprises an FPGA local clock correction module, an FPGA, a laser radar synchronization module, an FPGA triggering camera module which sends a picture of the camera containing the internal timestamp of the camera to an industrial personal computer; a camera picture timestamp module which is used for receiving flash lamp pulses generated during camera exposure by the FPGA and marking timestamps under an FPGA clock system for exposure moments of camera pictures; a timestamp matching module which is used for triggering the camera pictures with the camera internal timestamps sent by the camera module by the FPGA and receiving the camera pictures with the timestampsunder the FPGA clock system sent by the FPGA for matching; and a point cloud data compensation and fusion module which compensates the point cloud to the position of the exposure moment of the camera; and according to the measured external parameters of the laser radar and the camera, carries out alignment fusion on the point cloud data and the camera picture. Synchronous acquisition of the camera and the laser radar is realized.

The invention belongs to the filed of power system relay protection, in particular to a substation area back-up protecting method which is based on a current differential principle and applicable to an intelligent transformer substation. According to the method, information such as analog quantity, switching value and the like is acquired on the basis of high-speed communication networks and inter-station data channels inside the intelligent transformer substation, back-up protecting areas are processed in areas, all faults inside the transformer substation and on outgoing lines are positioned rapidly, reliably and accurately through the current differential principle, and under the condition of failure of a main protection and a breaker, a back-up tripping instruction is issued to isolate fault elements. The method changes the state of the prior art that selectivity of traditional back-up protection is achieved through fit of fault electric quantity and time limit step, simplifies configuration and setting of the back-up protection and shortens movement time limit of the back-up protection.

The embodiment of the invention provides a method for implementing synchronization acquisition, a wireless sensor network system and a synchronization device. Every wireless sensor network node of the wireless sensor network system collects data; a synchronization device of the wireless sensor network system receives the trigger message which is sent to every wireless sensor network node; every wireless sensor network node begins to transmit or store the valid data which is collected by the wireless sensor network node after the wireless sensor network system receives the trigger message. The time when the synchronization device receives the trigger message is unique, so the wireless sensor network node collecting data at the same time can be realized.

The invention relates to a vaporization bubble test apparatus with adjustable pressure and an adjustable temperature and belongs to the cavitation dynamics field. An upper portion of a test tank is provided with seven through holes. An infrared light transmission beam passes through one end of the through hole on a central axis and is put in the test tank and the other end is connected to a high speed heat imaging camera. Two electrodes pass through the through holes of two sides of the central axis and are suspended and fixed in the test tank. Pressure and temperature sensors pass through the through holes and are suspended and fixed in the test tank. A liquid conveying pipe valve is connected into the test tank through a pipeline. A gas interface valve is connected into the test tank through the pipeline. An electric heating pipe is suspended in the test tank. The test tank is put in a vacuum tank and is sealed through a flange plate. Side walls of the test tank and the vacuum tank are provided with visual observation windows. An axis of the high speed camera is superposed with an axis of the visual observation windows. The apparatus possesses good adjustability and is safe and reliable. And synchronization acquisition of a vaporization bubble form, a temperature field, pressure and temperature data of a liquid under different pressure and temperature conditions at a normal temperature and at a low temperature can be realized.

The invention discloses an online power transmission tower monitoring method and system of the power system. The monitoring method comprises the steps of data collection, data transmission, data display and analysis and early warning. The monitoring system comprises an onsite data collector, a data transmission module, a database, a data display module and an analysis and early warning module, wherein the onsite data collector synchronously collect four parameters including the wind speed and the wind direction of the wind-field environment of a power transmission tower as well as the vibration acceleration of the power transmission tower and the rod member strain of the power transmission tower, the data transmission module transmits received data to the data display module, the data display module displays the received data via a display interface, and transmits the received data to the analysis and early warning module, and the analysis and early warning compares the wind speed and the wind direction of the wind field environment, the vibration acceleration of the power transmission tower and the rod member strain of the power transmission tower with preset alarm values in the analysis and early warning module, emits alarm signals when the alarm values are exceeded, and thus, prevents the tower from falling off and prevents wires from being broken.

The invention relates to a medical examination and diagnosis method and instrument, in particular to a multi-dimensional electrocardio ultrasonic signal fusion computed tomography imaging system and method based on anatomical orientation. A multi-dimensional ultrasonic cardiac structure and a perfusion image technology are further integrated on the basis of a multi-dimensional electrocardiosignal imaging system and method, and a novel non-invasive platform is provided for recording and evaluating the electro-mechanical signal characteristic and myocardial perfusion characteristic of heart. The method is a unique electrocardio-mechanical function and perfusion synchronized computed tomography imaging method based on anatomical orientation, and the technology is a non-invasive imaging technology for detecting transmural cardiac electrical activity information and mechanical signals. By adopting the medical examination and diagnosis method and instrument, the diagnosis of myocardial diseases such as cardiac hypertrophy, cardiomyopathy, myocardial infarction and myocarditis, the determination of the origin of arrhythmia, and the like can be enhanced, and a brand-new diagnosis and guide treatment tool is provided for rapid real-time diagnosis of heart diseases.

The invention relates to a system and a method for synchronously acquiring load and response signals of a machine tool vibration test. The system comprises four parts, namely an excitation subsystem, a response signal acquisition subsystem, a data acquisition front end and a data processor, wherein the excitation subsystem comprises a power amplifier, a vibration exciter and a vibration exciting rod; the response signal acquisition subsystem comprises a force sensor, multiple acceleration sensors and multiple charge amplifiers; the input end of the data acquisition front end is connected with the response signal acquisition subsystem; one output end of the data acquisition front end is connected with the excitation subsystem, and the other output end of the data acquisition front end is connected with the input end of the data processor; and the data processor prestores a program for performing data processing on the load and response signals. The test system can be used for avoiding measurement errors caused by signal delay, filtering out errors in acceleration signals, and accurately analyzing the dynamic vibration response of each part and the complete machine of a machine tool, and has the advantages that the test is accurate, the operation is simple and the like.

The invention provides a swing arm profiler based on a capacitive displacement sensor and an alignment method thereof, which belongs to the field of optical element surface shape detection. The problem that the swing arm profiler cannot meet the need of high-precision detection in the prior art is solved. According to the invention, a measuring arm and an air flotation turntable are fixedly connected; the probe of the capacitive displacement sensor is arranged on one end of the measuring arm through a probe chucking device; a counterweight is arranged on the other end; a signal acquisition card acquires the angle signal of the air flotation turntable; and a control unit controls the capacitive displacement sensor and the signal acquisition card to acquire a signal at the same time. According to the invention, the high-precision capacitive displacement sensor is used; the action distance is zero; high-precision swing arm profile detection is realized; compared with a traditional swing arm profiler, the swing arm profiler has the advantages of higher measurement precision and better stability; the invention further provides the alignment method of the swing arm profiler based on the capacitive displacement sensor; and the dangerous problem that the swing arm profiler collides with an element when the swing arm profiler is aligned and measured is effectively solved.

The invention discloses an alternating current synchronous collecting system and an achieving method thereof. The alternating current synchronous collection system comprises a signal collecting unit, a global position system (GPS) clock synchronization unit, a signal processing unit and a main controller. The signal collecting unit is used for carrying out level switch for to-be-sampled alternating current parameters respectively through a voltage transformer and a current transformer, and inputting the alternating current parameters to each analog-digital converter after carrying out signal conditioning to the alternating current parameters after the level switch. The GPS clock synchronization unit is used for providing synchronous collecting frequency for each analog-digital converter. The signal processing unit is respectively connected with the signal collecting unit and the GPS clock synchronization unit and composed of a plurality of analog-digital converters and the main controller connected with each analog-digital converter through a data bus, wherein each analog-digital converter is used for carrying out analog-digital conversion to the alternating current parameters for generating digital quantity sample data. The main controller is used for reading the sample data through the data bus. According to the alternating current synchronous collection system and the achieving method thereof, sampling accuracy is high, conversion rate is quick, collecting quantity is large, instantaneity is good, and communication speed and data capacity of the system are improved.

Provided is anelectroencephalogram, myoelectricity and inertial information synchronous acquisition device. The device comprises a multi-information synchronous acquisition sensor, an embedded micro-processing system, a wireless transmission communication interface, a data receiving platform and a power module. The multi-information synchronous acquisition sensor acquires a synchronous electroencephalogram signal, a myoelectricity signal andinertial information in real time, the signalsare sent to the embedded micro-processing system through signal conditioning such as preamplification, activefiltering,post-amplification and the like, the micro-processing system conducts A/D converting and optimizing treatment on the electroencephalogram signal, the myoelectricity signaland the inertial information, and the signalsare wirelessly transmitted to the data receiving platform through the wireless transmission communication interface. The device has the advantages of multi-signal acquisition, wireless transmission, stable communication, strong expandability, portability, easy operation and the like, can be used for real-time synchronous acquisition of the electroencephalogram signal, the myoelectricity signal and the inertial information in the movement, meets the data receiving and processing requirementsof data application platforms such as PC, mobile phone and the like, and provides great convenience for human body motion posture analyses, function evaluation, brain-computer interface researches and application fields.

The invention provides a smoke detector certification device based on a laser light scattering measurement principle. The smoke detector calibrating device comprises a certification instrument and a calibration instrument, wherein the certification instrument comprises a certification instrument processing circuit, a measurement cavity 14 and a first photoelectric sensor 13, the measurement cavity is provided with a first transparent window 20 and a second transparent window 21, and the calibrationinstrument comprises a second photoelectric sensor 17 and a trigger 18; a measurement beam 23 is incident from the first transparent window and exits from the second transparent window; the first photoelectric sensor 13 is used for detecting the light intensity of a scattered beam formed in a way that the detected smoke is scattered; the second photoelectric sensor 17 is used for detecting the light intensity of a transmitted beam which is formed by passing through the detected smoke and exits from the second transparent window; the trigger is used for synchronously triggering the first photoelectric sensor and the second photoelectric sensor. According to the smoke detector certification device, a calibration scheme of synchronously triggering the first photoelectric sensor and the second photoelectric sensor at high speed is adopted, so that the difficulty of no standard smoke sample is solved.

The invention discloses a three pairs of sliding pair-spherical hinge-spherical hinge (3-PSS) mechanism-based coordinate measuring machine. The 3-PSS mechanism-based coordinate measuring machine is characterized in that: a three pairs of sliding pair-spherical hinge-spherical hinge parallel mechanism is provided; three motion sliding blocks are independently arranged on a pair of ball guide rails which are arranged in parallel and can slide freely along the ball guide rails respectively; the three motion sliding blocks are connected with one end of each of three pairs of link rods through one end of a universal joint respectively; the other end of each of three pairs of link rods are connected with a measuring moveable platform through the other end of the universal joint respectively; a measuring head is arranged on the lower plane of the measuring moveable platform; three indication gratings are fixedly connected to the three motion sliding blocks respectively; a scale grating and the pair of ball guide rails are arranged in parallel and are arranged on the guide rail mounting surfaces of guide rail cross beams; and the guide rail cross beams are suspended and fixedly connected to a pair of brackets. The 3-PSS mechanism-based coordinate measuring machine has high rigidity, a simple structure, high processing assembly property and low cost and can measure the three-dimensional space sizes, the shapes and the mutual positions of parts quickly and precisely.

The invention relates to an FPGA (Field-Programmable Gate Array)-based data acquisition system. The FPGA-based data acquisition system includes successively connected data acquisition module, data processing module and data transmission module, wherein the data acquisition module includes at least one data acquisition channel, and is used for performing synchronous acquisition and sampling on multi-channel of signals, and sending the sampling signals to the data processing module; the data processing module includes an FPGA processor which is connected with the data acquisition module and the data transmission module; the FPGA processor is used for processing the sampling signals, and controls the data acquisition module and the data transmission module through a soft core controller which is integrated in the FPGA processor; and the data transmission module is used for transmitting the signals which are processed by the data processing module to a host computer system. The FPGA-based data acquisition system can realize the most part of digital system design through the FPGA processor, can reduce the quantity of peripheral module circuits, can reduce the peripheral circuit PCB wiring and layout complexity, and can improve accuracy of signal acquisition and the data processing speed.

The invention relates to a physical parameter remote measurement and transmission device of underground ecological water based on a wireless sensor network, which comprises a sensor fixer, a data acquisition device, a data communication device, a communication cable, a message collecting and command giving device and a data summarizing/processing/showing backstage server, wherein the data communication device is installed on the sensor fixer; the line shaft and handle on the data communication device are fixed in the central position on a cross fixed mount; a communication cable is wound on the line shaft, passes through the central circular hole of the cross fixed mount and is vertically hung in a measured well after being connected with the data acquisition device; the data acquisition device is hung at the tail end of the communication cable; the message collecting and command giving device is connected with a PC (personal computer) through a serial port; and the PC is connected with the data summarizing/processing/showing backstage server. The physical parameter remote measurement and transmission device provided by the invention has the characteristics of novel structure, small volume, low cost, automatic data obtainment at regular time, synchronous acquisition of multiple data sources, wireless mode transmission, high detection accuracy and the like and has wide application prospects in the fields of agriculture and ecology.

The invention relates to a synchronous battery information acquisition device based on a FlexRay bus, and belongs to the technical field of energy storage. The device comprises more than one battery information acquisition devices, a central battery management device and the FlexRay bus for communication of the battery information acquisition devices and the central battery management device, wherein the battery information acquisition devices are used for providing synchronous sampling starting time points for a battery monomer voltage acquisition circuit, a battery monomer temperature collection circuit and a series battery current acquisition circuit according to static time slots of the FlexRay bus and sending start control signals, so that synchronous sampling of each acquisition circuit is realized. The synchronous battery information acquisition device based on the FlexRay bus utilizes a self-synchronizing mechanism of the FlexRay bus to synchronously acquire information including voltage, current and temperatures of a plurality of battery monomers, so that SOC (state of charge) and computation accuracy of an internal resistance model of the whole battery pack can be improved, a more reasonable running state of the battery pack is obtained, accordingly, the service life of the battery pack is prolonged, and the safety is improved.