Showing papers on "Serial port published in 2013"

FlockLab: a testbed for distributed, synchronized tracing and profiling of wireless embedded systems

Abstract: Testbeds are indispensable for debugging and evaluating wireless embedded systems. While existing testbeds provide ample opportunities for realistic, large-scale experiments, they are limited in their ability to closely observe and control the distributed operation of resource-constrained nodes - access to the nodes is restricted to the serial port. This paper presents FlockLab, a testbed that overcomes this limitation by allowing multiple services to run simultaneously and synchronously against all nodes under test in addition to the traditional serial port service: tracing of GPIO pins to record logical events occurring on a node, actuation of GPIO pins to trigger actions on a node, and high-resolution power profiling. FlockLab's accurate timing information in the low microsecond range enables logical events to be correlated with power samples, thus providing a previously unattained level of visibility into the distributed behavior of wireless embedded systems. In this paper, we describe FlockLab's design, benchmark its performance, and demonstrate its capabilities through several real-world test cases.

Using Arduino microcontroller boards to measure response latencies

Abstract: Latencies of buttonpresses are a staple of cognitive science paradigms. Often keyboards are employed to collect buttonpresses, but their imprecision and variability decreases test power and increases the risk of false positives. Response boxes and data acquisition cards are precise, but expensive and inflexible, alternatives. We propose using open-source Arduino microcontroller boards as an inexpensive and flexible alternative. These boards connect to standard experimental software using a USB connection and a virtual serial port, or by emulating a keyboard. In our solution, an Arduino measures response latencies after being signaled the start of a trial, and communicates the latency and response back to the PC over a USB connection. We demonstrated the reliability, robustness, and precision of this communication in six studies. Test measures confirmed that the error added to the measurement had an SD of less than 1 ms. Alternatively, emulation of a keyboard results in similarly precise measurement. The Arduino performs as well as a serial response box, and better than a keyboard. In addition, our setup allows for the flexible integration of other sensors, and even actuators, to extend the cognitive science toolbox.

Packet-Based Digital Display Interface Signal Mapping to Micro Serial Interface

Abstract: A passive cable adaptor for connecting a data source device with a display device is described. The adaptor has a packet-based interface connector at one end, the connector having a positive main link pin, a negative main link pin, a positive auxiliary channel pin, and a negative auxiliary channel pin. At the other end is a micro serial interface connector, wherein multimedia content is transmitted over the cable adaptor and electrical power is supplied over the cable adaptor simultaneously. The cable adaptor has an auxiliary and hot plug detect (HPD) controller utilized to map the auxiliary channel and HPD signals of the packet-based digital display to the micro serial interface ID signal.

The design of high speed UART

Abstract: Universal asynchronous receiver transmitter, abbreviated UART is a integrated circuit used for serial communications over a computer or peripheral device serial port. UARTs are now commonly included in microcontrollers. The universal designation indicates that the data format and transmission speeds are configurable and that the actual electric signaling levels and methods (such as differential signaling etc.) typically are handled by a special driver circuit external to the UART. Baud rate of 20Mbps using clock of 20MHz is used. FIFO (First-In-First Out) is used to store data temporarily during high speed transmission to get synchronization. The design is synthesized in Verilog HDL and reliability of the Verilog HDL implementation of UART is verified by simulated waveforms. We are using Cadence tool for simulation and synthesis.

Jtag bus communication method and apparatus

Abstract: Today the IEEE 1149.1 (JTAG) Tap port is used for many different applications. While initially designed to provide a serial test interface on ICs to facilitate board testing, the Tap port now serves as a serial interface for additional IEEE standards for such things as emulation and debug (IEEE 5001) of ICs and cores, mixed signal testing (IEEE 1149.4) of ICs and cores, embedded core testing (IEEE 1500), and in-system-programming of circuits in ICs and cores (IEEE 1532). The present invention describes a novel method and apparatus of using the JTAG Tap's TMS and/or TCK terminals as general purpose serial Input/Output (I/O) communication terminals. According to the present invention, the Tap's TMS and/or TCK terminal can be used as a serial I/O communication channel between; (1) an IC and an external controller, (2) between a first and second IC, or (3) between a first and second core circuit within an IC. The use of the TMS and/or TCK terminal as serial I/O channels, as described, does not effect the standardized operation of the JTAG Tap, since the TMS and/or TCK I/O operations occur while the Tap is placed in a non-active steady state.

Direct current motor GSM wireless remote control device

Abstract: The invention relates to a direct current motor GSM wireless remote control device comprising a computer, a wireless mobile communication module, a single-chip microcomputer, and a direct current motor driving module. The computer transmits a control instruction; the control instruction is sent to a remote wireless mobile communication module through the internet network and GSM wireless gateway of China Mobile Communications Corporation; the wireless mobile communication module transmits the instruction to the single-chip microcomputer through serial ports; the single-chip microcomputer with preset functional programs inside transmits control signals to the direct current motor driving module according to the control instruction, such that motor control is realized. Wireless remote control upon the motor can be carried out by using the device wherever China Mobile cell-phone signals exist. The device can also be used in combination with remote video monitoring systems in current markets. Feedback controls such as remote starting and stopping, steering, and speed of sensitive mechanical motion devices in monitoring sites can be realized. Compared with an ISM band short-range wireless control scheme, the device provided by the invention has a substantial advantage in remote wireless control.

Simulation and authentication method and device for multi-UAV (unmanned-aerial-vehicle) system

Abstract: The invention relates to fields of small-size unmanned aerial vehicle control technologies, embedded technologies and Wi-Fi wireless data transmission. In order to reduce the power consumption and the size of a simulation system, solve the problems of high cost for multi-vehicle system wiring and interactive communication of all vehicles, and improve the real-time performance of the simulation system, the technical scheme adopted by the invention is as follows: a simulation and authentication device for a multi-unmanned-aerial-vehicle system comprises a model universal computer, a main control computer, a view display computer, an industrial control computer, a wireless AP (access point)/router and a Wi-Fi wireless communication module, wherein the industrial control computer and a CPU inside the main control computer are connected with the Wi-Fi wireless communication module through a serial port and perform communication through the wireless AP/router, and the wireless AP/router is connected with the main control computer through a network. The method and the device are mainly applicable to design and simulation of multiple unmanned aerial vehicles.

The firefader: Simple, open-source, and reconfigurable haptic force feedback for musicians

Abstract: The FireFader is a simple haptic force-feedback device that is optimized for introducing musicians to haptics. It is based upon a single-degree-of-freedom potentiometer fader coupled to a DC motor, also known as a "motorized fader." A light is connected in parallel with the motor to help communicate the force's strength visually. The FireFader consists of only open-source hardware and open-source software elements. Consequently, it is relatively easy for users to repurpose it into new projects involving varying kinds and numbers of motors and sensors. An open-source device driver for the FireFader allows it to be linked to a computer via USB so that the computer can perform the feedback control calculations. For example, the computer can simulate the acoustics of a virtual musical instrument to concurrently synthesize sound and calculate the motor force as a function of the fader position. The serial connection over USB increases the latency of the control signal compared to embedded implementations, but the serial connection facilitates easier programming via the computer, and the force feedback can be automatically disabled when the user is not touching the fader. Some new devices derived from the FireFader design are presented.

System for testing comprehensive performance of reducer for robot joint

Abstract: The invention discloses a system for testing a comprehensive performance of a reducer for a robot joint. The system comprises a mechanical part and an electric control part; the mechanical part comprises a servo motor, a measured reducer, an angle measuring device, a torque sensor and a loading arm coaxially connected in sequence; all the parts are fixed on a horizontal guide rail by a bracket; the measured reducer is provided with a temperature sensor; the electric control part comprises an industrial control computer, a motion control card, a data collecting card, a counting card and a temperature collecting module; the motion control card is connected with the servo motor by a servo driver; the data collecting card is connected with a signal output end of the torque sensor and a torque monitoring end of the servo driver; the counting card is connected with a signal output end of the angle measuring device; and the temperature sensor is connected with a computer serial port by the temperature collecting card. According to the system for testing the comprehensive performance of the reducer for the robot joint, the comprehensive performance of the reducer for the robot joint can be tested; and the system is simple in structure, high in test precision and high in universality.

Heterogeneous multi-core infrared image processing system and method

Abstract: The invention discloses a heterogeneous multi-core infrared image processing system and method. The method mainly includes: 1, utilizing programmable logic of a Zynq to realize a driving schedule of a detector to complete collection and caching of an infrared image; 2, utilizing a CPU0 (central processing unit 0) of the Zynq to operate a Linux operating system to write a Qt-based display and control interface; 3, utilizing a CPU1 of the Zynq to respond to a serial port command in real time, and setting a system parameter and a video driving chip online; 4, utilizing the programmable logic to realize algorithmic hardware acceleration and a driving schedule of a video chip. The heterogeneous multi-core infrared image processing system and method has the advantages that a structure of ARM+FPGA in an all programmable platform Zynq chip is utilized to develop the heterogeneous multi-core infrared image processing system, design difficulty of hardware is remarkably reduced, a system bandwidth chokepoint brought by interconnection of conventional framework chip levels is removed, simplicity and flexibility in design and integration of a user IP (internet protocol) are realized, and high universality is realized.

Battery internal resistance on-line measuring instrument

Abstract: The utility model relates to a battery internal resistance on-line measuring instrument which comprises a channel selector switch (1), a preamplifier band-pass filter circuit (2), a multiplier (3), an integrator (4), a DC amplifier circuit (5), a single-chip microcomputer system (6), a keyboard (7), a display device (8), a serial port (9), a sampling circuit (10), a square wave converting circuit (11) and an AC signal generator (12). The battery internal resistance on-line measuring instrument realizes the on-line measurement by using an AC signal injected battery and utilizing phase lock amplification filtering technology, and is high in anti-interference capability. The measurement precision reaches below 0.01megaohm, and the battery internal resistance on-line measuring instrument is especially effective for measuring the internal resistance of large-power batteries. The battery internal resistance on-line measuring instrument allows stably painting of change curve of relation between a battery charging and the internal resistance under different conditions, comprehensively evaluates the performance of the battery and realizes intelligent measurement.

Automatic serial port protection circuit

Abstract: The invention discloses an automatic serial port protection circuit, and belongs to the electronic field. The automatic serial port protection circuit comprises a detector, a timer connected with an output end of the detector, a serial port switch which receives output signals of the timer, and an electrical level transformation protection circuit which outputs signals to the detector and is in two-way transmission with the serial port switch. Through the arrangement of the automatic serial port protection circuit, the defects that in the prior art, automatic detection is not realized, a circuit for opening and closing a serial port does not exist, and the working state of other hardware can be affected easily if a problem exists when the serial port is in an active state are overcome; and the serial port can be opened and closed automatically according to the active state of the serial port. Meanwhile, due to the fact that the timer is arranged on the automatic serial port protection circuit, a user can set the maintaining time of the movement of the serial port; and when the timer shows that the maintaining time is exceeded, the serial port closes automatically. The automatic serial port protection circuit is simple in implementation mode, low in cost and suitable for popularization and use.

Embedded type integratedly-manufactured data collecting terminal based on network

Abstract: The invention discloses an embedded type integratedly-manufactured data collecting terminal (NI-MDC) based on a network. The NI-MDC comprises an NI-MDC system platform and an NI-MDC drive software system, wherein the NI-MDC system platform comprises a core board, a reset circuit, an LCD module, touch screen equipment, a keyboard module, a DM9000 network card, an RFID read-write module and a serial interface read-write module. By means of an on-site data collecting end, the NI-MDC can finish real-time collecting of work data, material data, quality data, equipment state data and the like, provides accurate original data timely for production operation management of enterprises after the data are filtered and gathered by a data processing module and transmitted to a management system such as an MES, can carry out practical and effective production monitoring on a production site, and is safe, reliable, simple and practical.

Design and Implementation of a Fast General Purpose Fuzzy Processor

Abstract: In this paper, a Fast Fuzzy processor FP is proposed. This processor, which is implemented using FPGA, has four inputs and one output with 8-bits width for each. The proposed processor is synthesized, functionally verified and implemented using Xilinx Integrated Software Environment ISE and is tested using Xilinx Spartan 3E starter kit. A PC Graphical User Interface GUI is programmed using C# programming language to select and download the parameters of the processor through the serial port communication. The proposed processor is experimentally tested through water sprinkler system example. The experimental results approve the excellent performance of the proposed processor.

Public-security inner network and special video network isolation system and method

Abstract: The invention discloses a public-security inner network and special video network isolation system and method. A limited unidirectional serial channel and a high-speed unidirectional network channel are creatively selected for connection; according to the method, a user-defined encryption protocol and a packet format are used for carrying out unidirectional video access instruction transmission; and an attacker cannot obtain decryption methods, so that even in the most extreme case that an internal network video server is manipulated by the attacker and data are sent out through a serial port, the data can be intercepted by a high-speed unidirectional optical-fiber isolating receiver and cannot be transmitted to special video networks, and then, an inner network is effectively protected.

Coal mine electromechanical equipment data acquisition and analysis gateway

Abstract: The invention belongs to data acquisition and analysis gateways, and discloses a coal mine electromechanical equipment data acquisition and analysis gateway. The coal mine electromechanical equipment data acquisition and analysis gateway comprises a device and a method. The device comprises a core processing module, a data memory module, a program memory module, a controller area network (CAN) bus module, a serial port communication module, an Ethernet protocol conversion module, a fiber interface module, an RJ45 interface module and a power module. The core processing module is simultaneously connected with the data memory module, the program memory module, the CAN bus module, the serial port communication module and the Ethernet protocol conversion module. The Ethernet protocol conversion module is simultaneously connected with the fiber interface module and the RJ45 interface module. The power module is connected with all the modules and supplies power sources to all the modules. The method is based on a data receiving module, a data analysis module, a data uploading module and a gateway setting module, wherein the four modules are implemented through software to control working processes and working modes of hardware. The coal mine electromechanical equipment data acquisition and analysis gateway has the advantages of being capable of setting corresponding equipment names, interface types and communication protocols and realizing in-place analysis, storage and retransmission of data.

Light and small three-dimensional laser scanning measurement system and method

Abstract: The invention provides a light and small three-dimensional laser scanning measurement system and method. The light and small three-dimensional laser scanning measurement system comprises a GPS (Global Position System), an inertial navigation system INS, a laser scanner, a digital camera, a serial port and a data acquisition computer, wherein the GPS positioning system comprises a GPS antenna and a GPS receiver, which are electrically connected with each other; the GPS receiver, the inertial navigation system INS and the laser scanner are connected to the data acquisition computer through the serial port; and the GPS receiver is further respectively connected with the digital camera and the INS. The invention has the advantages of low cost and good portability, and is particularly suitable for data acquisition in small regions, such as small districts, factories, villages and towns within an area of 50 square kilometers.

Vehicle-mounted device of electric automobile

Abstract: The invention provides a vehicle-mounted device of an electric automobile. The device comprises a master control module, a CAN (controller area network) bus communication module, a 3G (third-generation) wireless communication module, a GPS (global positioning system) data receiving and processing module, and a user interaction module; the CAN bus communication module is in two-way connection with the master control module through an SPI (serial peripheral interface) bus, and the 3G wireless communication module, the GPS data receiving and processing module and the user interaction module are all in two-way connection with the master control module through a serial port. The vehicle-mounted device of the electric automobile has the functions of real-time monitoring of operation information of a vehicle and a battery, vehicle locating and navigating, and providing multimedia service, is suitable for intelligentized monitoring and management of the electric automobile industry, interaction of the electric automobile and a power grid, and remote diagnosis and emergency rescue of the vehicle, is fast in data collecting and processing, high in software platform development and operation efficiency, and friendly to a human-computer interface, and safe and reliable operation of the electric automobile can be guaranteed.

Multifunctional laser dust meter

Abstract: The utility model discloses a multifunctional laser dust meter. The multifunctional laser dust meter comprises a detection unit, a control and display unit, a wireless transmission unit and a power source, wherein the detection unit comprises a gas separation cutter, a dark room, a light source system, a photoelectricity receiving system, a filter membrane sampler, a shunt, a flow sensor and a filter; the control and display unit comprises a micro computer, a display, a keyboard and a printer; the micro computer is respectively and electrically connected with the light source system, the display, the keyboard and the printer; a computer communication serial interface is electrically connected between the wireless transmission unit and the computer; and the power source is respectively and electrically connected with the detection unit, the control and display unit and the wireless transmission unit. The multifunctional laser dust meter not only can detect the concentration of dust particles, but also has a wireless transmission function and a function of supporting two-way communication.

All-in-one machine and method for realizing quick touch of all channels in all-in-one machine

Abstract: The invention provides an all-in-one machine and a method for realizing quick touch of all channels in the all-in-one machine. The all-in-one machine comprises a touch frame, a USB (Universal Serial Bus) change-over switch, a built-in PC module and a main board, and further comprises a MCU (Microprogrammed Control Unit), wherein the touch frame is connected to the USB change-over switch by a USB; the USB change-over switch is further connected to peripheral equipment and the built-in PC module by the USB; and the MCU is connected to the touch frame through a serial port, and is further connected to the main board by the USB. The all-in-one machine and the method for realizing quick touch of all channels in the all-in-one machine can avoid time waste caused by the USB identification; and quick touch operation can be realized after the completion of the switch of the USB change-over switch, so that in all the channels, quick touch operation can be realized.

Comprehensive detection device

Abstract: The utility model provides a comprehensive detection device which is used for monitoring a vehicle shaft temperature intelligent detection system. The comprehensive detection device comprises a plurality of monitoring modules, a plurality of monitoring units and a monitoring management center, wherein the plurality of monitoring modules are used for acquiring parameters of the vehicle shaft temperature intelligent detection system by a serial port, a parallel port and an internet port or in a wireless way; the plurality of monitoring units generate data transmission signals or alarm signals based on the parameters, each monitoring module is only communicated with one monitoring unit, and each monitoring unit is communicated with respective monitoring module in a polling manner; the monitoring management center receives the data transmission signals or the alarm signals through network and configures the monitoring units and the monitoring modules; and the monitoring management center, the monitoring units and the monitoring modules form a three-layer network structure. According to the comprehensive detection device, the alarm linkage, the compression storage of collected data and video data, the transmission and the automatic process can be realized, the resource share can be achieved, and the problem of unwatched remote monitoring in a detection station of the vehicle shaft temperature intelligent detection system in the prior art can be solved.

HVDC (high voltage direct current controller) and UPFC (unified power flow controller) system based on modularized multi-level converter

Abstract: The invention provides an HVDC (high voltage direct current controller) and UPFC (unified power flow controller) system based on a modularized multi-level converter. The HVDC and UPFC system comprises converting devices (1, 2 and 11), grounding circuits (3 and 12) and a direct current transmission line (13). The UPFC is formed by the converting device (1) and the converting device (2). The HVDC is formed by the converting device (1) and converting device (11). The HVDC and the UPFC shares one converting device, so that cost and investment for engineering construction are saved, equipment utilization rate is improved, concentrated management and control are facilitated. The converting devices use the topological structure of the modularized multi-level converter, so that technical difficulty in component serial connection is avoided, split-phase control and modularization are facilitated, fault units can be bypassed through redundancy, operation stability of the devices is improved, on and off frequency of components is low, and device operation loss is low.

Intelligent socket device based on power line carrier communication

Abstract: The utility model relates to an intelligent socket device based on power line carrier communication, which is composed of 14 parts such as a single chip microcomputer, a power supply, a power line carrier communication module, a carrier circuit, a storage, a keyboard, a serial port circuit, a clock, a calibration interface, a display screen, a metering circuit, a magnetic latching relay, a relay driving circuit, and an outer shell. The device is connected with controlled electrical equipment through an insertion slot, not only can meter the energy consumption of the controlled electrical equipment, send data to a gateway through the power line carrier communication module, upload the data to a network server through the gateway, and can realize the remote intelligent management of household appliances by controlling the on/off state of the intelligent socket through the network remotely. Meanwhile, the display screen and the keyboard designed in the intelligent socket device support local data query and timing control of electrical appliances.

Novel sanitation vehicle intelligent monitoring device

Abstract: The invention discloses a novel sanitation vehicle intelligent monitoring device. The novel sanitation vehicle intelligent monitoring device comprises a vehicle-mounted terminal, a camera module, a GPS module and a power supply, wherein the vehicle-mounted terminal is connected with the camera module and the GPS module through serial ports, the vehicle-mounted terminal is in wireless connection with a central server, a TTS functional box is arranged in the vehicle-mounted terminal, a loudspeaker is arranged outside the vehicle-mounted terminal, and four routes of analog quantity input, four routes of digital quantity input and two routes of digital quantity output are arranged on the vehicle-mounted terminal. Intellectualization and stability of the sanitation vehicle intelligent monitoring device are greatly improved. The vehicle-mounted terminal can work while the TTS functional box is arranged in the vehicle-mounted terminal and the loudspeaker is externally connected to the vehicle-mounted terminal. The vehicle-mounted terminal supports a plurality of standard serial ports, the requirements of various vehicles for signal access can be met when no other devices need to be expanded externally, and therefore cost is saved for costumers. Voltage stabilization design is conducted on both two the two routes of 5V power output, control can be conducted in the background, and the stability of the external devices of the vehicles is improved. An ultra-long data storage function is achieved, data of the vehicle-mounted terminal can be stored for a long time when the central server fails, and the data are prevented from being lost.

Web server-based laboratory monitoring system

Abstract: The invention relates to a monitoring system, in particular to a Web server-based laboratory monitoring system, which comprises a laboratory monitoring node, a Web server, a GSM (Global System for Mobile communication) module, a database and a monitoring terminal, wherein the laboratory monitoring node is connected with the Web server through an RS485 serial port; the GSM module is connected with the Web server through an RS232 serial port; and the Web server is connected with the monitoring terminal through the Internet and a GSM network. The Web server-based laboratory monitoring system has the beneficial effects that the system can monitor temperature and humidity values in a laboratory, meanwhile can monitor on/off states of windows, fans and lamps in the laboratory, can monitor the laboratory in the Internet and GSM network modes, has a simple structure, is convenient to operate and has great promotion and application value.

Lower-power-dissipation industrial wireless network data transmission device and application method thereof

Abstract: The invention discloses a lower-power-dissipation industrial wireless network data transmission device and an application method of the lower-power-dissipation industrial wireless network data transmission device The lower-power-dissipation industrial wireless network data transmission device comprises a microprocessor unit (MPU) circuit, a radio-frequency module, a serial interface circuit and data acquisition circuits Serial peripheral interface (SPI) interconnection is adopted between the MPU circuit and the radio-frequency module The serial interface circuit is connected with an input end of the MPU circuit, and the other end of the serial interface circuit is connected with a personal computer (PC) or a handheld device Output ends of the data acquisition circuits are connected with the input end of the MPU circuit Industrial field data acquired by the data acquisition circuits are processed by the MPU circuit and the radio-frequency module to achieve data transmission, data forwarding, data display and data control The application method of the lower-power-dissipation industrial wireless network data transmission device includes that a software protocol stack, application programs and a radio-frequency-based module are established to enable a short-distance industrial wireless network to be established, and network-based management and monitoring can be easily performed on the lower-power-dissipation industrial wireless network data transmission device The lower-power-dissipation industrial wireless network data transmission device can work in an industrial filed which is very hostile in environment, and has the advantages of being multifunctional, low in power dissipation, small in size, high in reliability and the like The lower-power-dissipation industrial wireless network data transmission device is mainly applied to the field of industrial automatic monitoring

Apparatus and method emulating a parallel interface to effect parallel data transfer from serial flash memory

Abstract: Apparatus and method emulating a parallel interface to effect parallel data transfer from serial flash memory are provided. A field-programmable gate array (FPGA) may be coupled to a processor via a data bus. A serial flash memory may be coupled to the FPGA via a serial interface. The FPGA may be programmed to emulate a parallel interface by converting a serial data stream of boot code or operating software received from the serial flash memory to a parallel data stream to effect parallel data transfer over the data bus to the processor. The FPGA may be responsive to respective logic signals set by the processor to start access to the serial flash memory by pointing to at least one predefined location corresponding to at least one starting address of data to be transferred to the processor without using a plurality of address lines to access the serial flash memory.

Finger vein villa management system

Abstract: The invention provides a finger vein villa management system which utilizes a finger vein recognition technology and comprises a high-performance ARM board, a non-contact sensor which utilizes infrared to collect deoxidized hemachrome in a finger of human body, a display screen with a touch screen, a terminal which is composed of wireless transmission devices, a entrance guard control system and relevant personal computer (PC) servers. The high-performance ARM board is an ARM high performance board with a central processing unit (CPU) which is at least above ARM Cortex-A8 and possesses a floating point arithmetic function and an internal memory which is more than 512 mega byte. The high-performance ARM board comprises a universal serial bus (USB) interface, a general purpose input/output (GPIO) interface, a general serial port RS 232, a general serial port RS 485 and a network interface and is connected with the finger vein entrance guard through the USB interface. A card issuer is a PC computer which is connected with an entrance guard controller through the recommend standard (RS) 232 and is connected to a villa management server. The finger vein villa management system utilizes the finger vein recognition technology, possesses a non-contact identity to conduct verification, is high in safety performance and is convenient to use.

Platform for detecting function and performance of power distribution automatic terminal apparatus

Abstract: The utility model discloses a platform for detecting the function and performance of a power distribution automatic terminal apparatus, mainly comprising a printer, a server, a network switch, an analog breaker, a detected power distribution terminal, and a standard source, wherein the server is connected with the printer through a serial port line, the server is connected with the network switch through a network cable, the network switch is connected with the communication module I of the analog breaker through a network cable, the network switch is connected with the communication module I of the standard source through the network cable, the detected power distribution terminal can exchange data with a power distribution analog master station (server) through employing a network communication mode, a serial port communication module, or a wireless communication mode, etc. The platform is excellent in generality, can satisfy the demands of network access detection, leaving-factory check and acceptance detection, operation detection and practical check and acceptance detection services of a power distribution network automatic system device, and can ensure the power distribution network terminal to safely, reliably and stably operate.