41 results about "PCI eXtensions for Instrumentation" patented technology

The invention discloses a radio frequency and microwave synthetic instrument based on a PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture. A control platform accesses to a PXIe bus through a PXIe system controller; a digitizer module, a signal generator module, a down-conversion module, a down-conversion local oscillator, an up-conversion module and an up-conversion local oscillator all access to the PXIe bus; signal line direct channels are respectively arranged between a synthetic instrument hardware interface and the digitizer module and between the synthetic instrument hardware interface and the signal generator module; the down-conversion module is connected with the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected with the up-conversion local oscillator and the signal generator module; the down-conversion module and the up-conversion module are connected with the synthetic instrument hardware interface; and the control platform can enable the synthetic instrument to have different functions through configurations. The synthetic instrument provided by the invention can be used for realizing the miniaturization of a communication/radar electronic equipment test system by sharing a processing module and can meet the requirements of a new generation of automatic test systems.

The invention discloses a PXI (PCI eXtensions for Instrumentation) system-based passive CPT (Coherent Population Trapping) atomic clock experimental facility, wherein a PXI system is respectively connected with a through circuit, a current source, a microwave source, a current to voltage circuit, a crystal oscillator and a frequency tester; the crystal oscillator is connected with a power divider; one of two output ends of the power divider is connected with the microwave source, while the other end is connected with the frequency tester; a coupling circuit is respectively connected with the PXI system, the current source and the microwave source; a physical system is respectively connected with the output end of the coupling circuit and the input end of the current to voltage circuit; the physical system is also connected with the through circuit. The invention further discloses a PXI system-based passive CPT atomic clock experimental method, wherein the PXI system is used as a control core for realizing the temperature control, direct current locking and feedback, microwave locking and feedback, and self-turning of working parameters. The experimental facility and method disclosed by the invention have the advantages of being simple in structure, high in degree of automation, and high in processing capability for digital signals, and are suitable for experiment research on various schemes of a passive CPT atomic clock.

The invention discloses a real-time GNSS/INS (global navigation satellite system/inertial navigation system) combined navigation signal simulator based on a PXI (PCI extensions for instrumentation) bus and relates to a real-time GNSS/INS combined navigation signal simulator in the navigation field. The simulator comprises a time-frequency signal processing unit, a user signal generating unit, the PXI bus, a PXI slot-0 controller, a rubidium clock and the like; the user signal generating unit is composed of multiple frequency-point signal generating modules, a radiofrequency signal combiner, a power divider, a power attenuator and the like. The PXI bus technique is used in system structuring, configurability and extensibility are excellent, the simulator is imparted multi-navigation system multi-frequency GNSS/INS navigation signal simulation capacity by selecting parts, especially the multi-user GNSS/INS combined negation signal simulation output capacity, and the need of the navigation field for real-time testing of GNSS, INS and GNSS/INS combined navigation signals is fully met.

The invention discloses a check system for a LabVIEW-based automobile instrument. The check system for the LabVIEW-based automobile instrument comprises an upper computer, a national instruments corporation PCI extensions for instrumentation-6624 (NIPXI-6624) board card, two NIPXI-6528 board cards, a programmable network resistor, a controller area network (CAN) communication board card, an NIPXI case, a serial port to universal serial bus (USB) data line and a LabVIEW human-computer interface software program. The upper computer communicates with the NIPXI case by the serial port to USB data line; the NIPXI board cards are inserted into corresponding slots in the NIPXI case; the NIPXI-6624 board card is respectively connected with a speedometer and a tachometer; one of the two NIPXI-6528 board cards is connected with a fuel meter and a water-thermometer by the programmable network resistor; the other NIPXI-6528 board card is connected with various switching value signal indicating lamps; the upper computer, the NIPXI board cards and various instruments communicate with the switching value signal indicating lamps by a CAN bus of the CAN communication board card; and the LabVIEW human-computer interface software program is a software platform of the check system. The portable automobile instrument check system is compact and flexible and is high in reliability, and the real-time feedback of automobile state information can be realized by aiming at different automobiles.

The invention relates to a nuclear power station pressure pipeline leakage acoustic emission monitoring method and a monitoring system thereof. The monitoring method comprises the following steps that: a pressure pipeline leakage test piece is prepared; the defects of initiation, cracks, expansion and even through leakage of a nuclear power station pipeline are simulated; a leakage acoustic emission calibration test is taken; and the pipeline through crack leakage of the high-temperature and high-pressure environment of a nuclear power station is simulated. The monitoring system adopts a standardized and modularized design based on a PCI extensions for instrumentation (PXI) bus, so that the system overhaul and the part replacement are convenient. According to the invention, the data recording of leakage events and the database management of monitoring results can be carried out, and the leakage positions and the dynamic changes of the leakage rate thereof can be comprehensively reflected.

The invention relates to a 14-slot PXI (PCI extensions for instrumentation) chassis which comprises a 14-slot bus rear plate, a power supply air-channel clapboard, a chassis switch power supply, a chassis fan and a PXI module, wherein the 14-slot bus rear plate is provided with 14 slots in total; the first slot is used as a power supply and mechanical interface of a bus system controller; the second to the fourteenth slots are used as the power supply and mechanical interfaces of peripheral modules; the second slot is provided with a star-shaped trigger controller for supplying 13 trigger signals to each extension slot; the power supply air-channel clapboard is used for separating a power supply air-channel from a chassis module radiating air-channel; and the chassis switch power supply is used for supplying multichannel direct current voltages to the 14-slot bus rear plate and comprises AC/DC (alternated current or direct current) power supply and DC/AC power supply. The chassis provided by the invention has a compact structure layout. The design for a layout air channel of a heat source part and the designs for the chassis structure intensity, the vibration resistance and the electromagnetic compatibility are comprehensively considered. The chassis has the advantages of reasonable integral layout, compact structure and obvious radiating effect.

The invention relates to a vector signal source plug-in card-type structural module based on a PCI extension for instrumentation (PXI) bus, which comprises a PXI interface circuit 1, a baseband signal generating circuit 2, a digital-to-analogue conversion circuit 3, a frequency synthesis circuit 4, an in-phase quadrature (IQ) vector modulation circuit 5 and an adaptive logic circuit (ALC) control and vector signal source output circuit 6 which are combined with an external plug-in card E to form a modular structural integrity. According to the software radio technology and the modular structural design principle of an integrated circuit, a mathematical model is established; a microwave and a high-speed digital processing chip are adopted to set required vector signal source frequency, amplitude and power to perform real-time calculation to generate modulation output. Technologically, the optimal shielding, grounding, decoupling, filtering and leakage prevention optimization design is adopted to realize the characteristics of reasonable layout, compact structure, skillful installation, wide expansibility, high adaptability, high reliability and the like, and the requirements of automatic testing and analysis of a traditional digital communication system are completely met, and the need of the development of the communication technology is adapted.

The invention discloses a detection and remote monitoring system for a motor on the basis of a PXIe (PCI extensions for Instrumentation Express) testing platform. A cloud server is independently connected with the PXIe testing platform and an intelligent terminal application module through the Internet; the PXIe testing platform can simultaneously detect four main classes of signals, including temperature, sound and vibration, voltage and current and revolving speed for an operating motor; collection and real-time data analysis are carried out; an original signal and a processing and analysisresult are stored to the cloud server for backup; meanwhile, an App application service under a Web side, Android and IOS (Iphone Operating System) platforms can be provided for the intelligent terminal application module; and a system user can check the state of the motor through different terminals and also can read a historical record according to a query condition. By use of the system, a PXIeindustrial grade product is selected as the hardware of the testing platform, and therefore, the system has the outstanding characteristics of being high in accuracy and bandwidth and low in delay, can replace and expand a general module according to different application requirements, and can be quickly integrated with other buses and independent equipment.

The invention discloses a real-time synchronous measuring instrument and method of spectrum response of a photovoltaic material, belonging to the technical field of measurement. The real-time synchronous measuring instrument of spectrum response of the photovoltaic material comprises a computer with software, a PXI (PCI eXtensions for instrumentation) platform, a monochromator provided with a stepping motor, an illuminometer, a PXI6534 data acquisition card and a PXI4072 data acquisition card, wherein the PXI platform and the illuminometer are connected with the computer, the PXI6534 data acquisition card and the PXI4072 data acquisition card are arranged on the PXI platform, the monochromator is connected with the PXI6534 data acquisition card, and the PXI4072 data acquisition card is connected with a silicon photocell. During the measurement, a light source mercury lamp and a sodium lamp with known spectrum are used, the step number of the stepping motor is recorded when the monochromator separates out light with specific wavelength, and then a calibration curve of the wavelength and the step number of the stepping motor is drawn by utilizing a polynomial fitting method; and when a xenon lamp is used instead of the mercury lamp and the sodium lamp, the stepping motor rotates, a program obtains the congruent relationship between the corresponding spectrum line and the wavelength according to the calibration curve, the PXI4072 data acquisition card acquires the real-time short circuit current, the illuminometer collects the information of irradiance, and a triggering signal is used for controlling the xenon lamp to be turned on and the short circuit current and the irradiance to be acquired highly synchronously.

The invention relates to a PXIe interface Nand Flash data steam disc access accelerating method, aiming at solving the problems that a high-speed data stream disc has a very high requirement on I/O (Input/Output) speed, the access speed of Nand Flash arrays cannot be improved to the utmost extent, and the Nand Flash access speed is not matched with the PXI (PCI Extensions for Instrumentation) Express high-speed interface speed. The method comprises the steps of adopting a three-level acceleration programming method to program Nand Flash, and adding first-level preprogramming operation in the programming sequence of each minimum control unit to enable the n+1 programming operation of each minimum control unit to lag behind the n programming operation of each minimum control unit; and reading data from four Nand Flash chips to realize the streamline acceleration of data reading. The PXIe interface Nand Flash data steam disc access accelerating method is applicable to the field of testing.

The invention discloses a device and a method for an SDH (Synchronous Digital Hierarchy) clock jitter test. The device comprises a power module, a signal input module, a photovoltaic conversion module, a differential amplification module, a clock recovery module, a tracking clock recovery module, a jitter recovery module, a signal conditioning module, an A/D (Analog/Digital) conversion module, a FPGA (Field Programmable Gate Array) jitter test module, a PXI (PCI extensions for Instrumentation) bus control module and an upper computer module. Firstly, the device adopts the FPGA jitter test module to omit expensive test instruments and save the cost of the SDH clock jitter test. Secondly, the device adopts an integrated clock recovery chip ADN2812, a differential amplifier ADL5566, an interface chip PCI9054 and the like, so that the area and the complexity of a test circuit are reduced, and the use of a PLL (Phase Locked Loop) circuit is reduce. Finally, the device adopts a way that the upper computer module controls and tests the FPGA jitter test module to reduce the use of an analog circuit and cause a SDH clock jitter test result to be more reliable.

The invention discloses a PXI (PCI Extension for Instrumentation) bus programmable amplification/attenuator device and calibration method thereof and belongs to the field of microwave signal conditioning. According to the invention, a single-block 3U single-slot PXI module is adopted for implementing programmable amplification and attenuation functions in wide frequency bands as wide as 80db at the same time, so that hardware resource is saved. Through flexible matching and cascaded connection of different signal conditioning circuits, signal amplitude conditioning range is increased and power calibration is performed on circuits at different temperatures and frequencies, so that measurement of microwave signals becomes more flexible and accurate.

The invention provides a detection apparatus and method of a digital signal processing module of an airborne interrogator. The detection apparatus comprises a test master. The test master is connected with a backboard of a PXI (PCI extensions for Instrumentation) case through hardware functional modules with standard PXI bus interfaces. Each hardware functional module comprises a master control computer, a bus card, a 1553B card, a comprehensive interface card, a universal meter card and an oscilloscope card. The detection apparatus further comprises a test fixture and a keyboard display module; the test fixture comprises a power module, a bottom board adapter plate and a structural cavity; the structural cavity is used for supporting; the power module powers a test-piece to be tested, as required and outputs the power through the bottom board adapter plate; the keyboard display module is connected with the master control computer; the test-piece to be tested is mounted on the test fixture and is connected with a host through a cable. The detection apparatus and method has the advantages that the size is small, the cost is low, testing can be performed for functions, performances and the like of the digital signal processing module of the airborne interrogator, and device-level fault localization can be achieved.

The invention discloses a data collecting device for a micro tester. The data collecting device comprises a PXI (PCI extensions for instrumentation) system, a switch converting circuit, an oven, a pressure controller, and a controller/host. The PXI system consists of a single-pole single-throw switch, a single-pole double-throw switch, a matrix switch, a digital multi-meter, a digital converter and a plurality of system expansion interfaces; and a sensor adapter and a sensor are arranged in the oven. The PXI system is connected with the switch converting circuit through a cable; the switch converting circuit is connected with the sensor adapter in the oven through the cable; the sensor in the oven is connected with the pressure controller; the controller/host is respectively connected with the PXI system, the switch converting circuit, the oven, the sensor in the oven, a power supply source and the pressure controller. The sensor is calibrated and corrected by using the data collecting device provided by the invention with high efficiency, so as to meet the requirement of mass production. The data collecting device provided by the invention is applicable to data collection when a sensor precision test is carried out.

The invention discloses a portable PXI case and a portable PXI test system. The portable PXI case comprises an open case shell, a display part, a pivotal part, a power module, a PXI backboard, a display screen, a keyboard and a touchpad, and the display part, the pivotal part, the power module, the PXI backboard, the display screen, the keyboard and the touchpad are matched with the case shell; the display screen and the display part are integrated and pivotally connected with the case shell through the pivotal part; at least one outer surface of the case shell is provided with a handle; the PXI backboard, the power module, the keyboard and the touchpad are respectively arranged in the case shell; the PXI backboard is provided with a power interface, a plurality of PXI slots and a plurality of peripheral interfaces, the power module is connected with the PXI backboard through the power interface, and the keyboard, the touchpad and the display screen are respectively connected with the PXI backboard through the corresponding peripheral interfaces. The portability of the PXI case is increased, and therefore more convenience in use is brought to users.

The invention discloses a device for eliminating a laser radar speed measuring zero point. The device comprises a polarization-preserving laser, a first flange plate, a 2*2 polarization-preserving coupler, an elliptic core polarization-preserving fiber, a single-mode circulator, a second flange plate, a polarization-preserving collimator, a 2*2 single-mode coupler, a photoelectric detector, a PXI (PCI extensions for instrumentation) acquisition card and a computer. The elliptic core polarization-preserving fiber and the 2*2 polarization-preserving coupler are welded as required to achieve the effect of a lambda/4 fiber wave plate, local oscillation light passing through the elliptic core polarization-preserving fiber is changed from linear polarized light into circular polarized light, the speed is prevented from suddenly being zero due to mismatch of the local oscillation light and the polarization state of an echo light in the speed measuring process, and beat frequency efficiency is improved.

The invention discloses a PXIe case expansion method, equipment and a medium. The method comprises the steps of acquiring request information sent by a client to a specified embedded controller; the embedded controller is arranged in a PXIe (PCI eXtensions for Instrumentation) case; analyzing the request message to obtain a slot number and an operation instruction; determining a PXIe peripheral module corresponding to the slot position number according to a preset mapping relation between the slot position number and the PXIe peripheral module; the PXIe peripheral module is arranged in the PXIe machine case; and sending the operation instruction to the PXIe peripheral module through a router, so that the PXIe peripheral module executes a corresponding action according to the operation instruction. According to the method of the invention, the PXIe peripheral module is used as the PCIe peripheral of the embedded controller, and the embedded controller, the PXIe case and the PXIe peripheral module are used as basic units for extension of the PXIe case, so that the extension of the PXIe case can be realized without customizing special hardware for extension of the PXIe case.

The invention discloses a simple and efficient programmable resistance board, which relates to the technical field of an electronic product. A USB (Universal Serial Bus) interface circuit (2) and a serial interface circuit (3) of the simple and efficient programmable resistance board are both connected with an MCU (Micro Controller Unit) circuit (4), the MCU circuit (4) is connected with a driving circuit (5) through an SPI (Serial Peripheral Interface) IN interface, the driving circuit (5) is respectively connected with an SPI OUT interface and a relay array (6), the relay array (6) is connected with a resistance array (7), and a power supply circuit (1) is connected with the USB interface circuit (2), the serial interface circuit (3), the MCU circuit (4), the driving circuit (5), the relay array (6) and the resistance array (7). Compared with a traditional PCI (Peripheral Component Interconnect) or PXI (PCI Extensions for Instrumentation) bus, the simple and efficient programmable resistance board disclosed by the invention has the advantages that the structure is simple, the weight is light, the size is small, independent use or cascade extension can be carried out, and the like.

The invention provides an aging test method. An anti-aging and anticorrosive mechanical structure, a PCI extension for Instrumentation (PXI) bus architecture, LabVIEW and TestStand platforms, a high-speed controller area network (CAN) card, a simulation acquisition card, an international general virtual path connector (VPC) and a data uploading system are adopted for implementing the method. The invention solves the barriers of the conventional foreign technology, and provides the aging test method with stable performance, strong function, high integration, low cost and flexible compatibility.