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875 results about "RS-485" patented technology
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RS-485, also known as TIA-485(-A), EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems are supported. The standard is jointly published by the Telecommunications Industry Association and Electronic Industries Alliance (TIA/EIA). Digital communications networks implementing the standard can be used effectively over long distances and in electrically noisy environments. Multiple receivers may be connected to such a network in a linear, multidrop bus. These characteristics make RS-485 useful in industrial control systems and similar applications.
Reliable, long-haul data communications over power lines for meter reading and other communications services
InactiveUS20110140911A1Highly long-haulImprove reliabilityElectric signal transmission systemsPower distribution line transmissionPower qualitySignal quality
A system, method and computer program product provides for power line communications (PLC) over electric power lines includes a device mountable near an electrical distribution transformer (DT) to provide a high speed interface and communicates with one or multiple access devices, which provide low speed interfaces for analog signals or digital signals over RS 232, RS 485, optical, wireless and Ethernet. The device transmits data to / from these access devices over the electric lines to other repeaters over one or more wires of an electrical line or over multiple lines, and serves to strengthen and improve signal quality. Upon detecting a wire or line is having problems carrying data, the data is sent over other wires, and upon power line failures, wireless backup to mobile / GSM and WiMax networks is utilized. The device permits utilities and others to read electric meters, monitor the power quality of the distribution grid and detect power losses / failures / outages, and permits telecom service providers and others to provide a communications link to cell phone towers, WiFi Access Points and enable broadband Internet and telephony in rural, remote or sparely populated areas.
Owner:POWERMAX GLOBAL
Programmable and expandable building automation and control system
InactiveUS20050090915A1Readily modified and expanded and repairedReduces warranty and support costProgramme controlSampled-variable control systemsModem deviceSmart card
A programmable and expandable building automation and control system 10. A system platform supports interchangeable smart card 12, security card 22, power supply card 24, telephone / voice / modem card 26, HVAC relay control 62, auxiliary relay control 66, power 80, telephone interface 30, sensor analog inputs 32, smoke detector interface 54, siren / strobe output 82, tamper loop 52, protected peripheral power supply 72, switched peripheral power supply 74, PLC communication protocol interface 18, RS 232 communication interface 14, RS 485 communication interface 16, touchscreen user interface 28, and “smart” key interface 34 via “smart” key 104. In addition to touchscreen and smart key interface, user-interface with system 10 is accommodated via telephone, personal computer or personal digital assistant, or through infrared or radio frequency transmission.
Owner:SMART SYST TECH
Reliable, long-haul data communications over power lines for meter reading and other communications services
InactiveUS8947258B2Highly long-haulImprove reliabilityElectric signal transmission systemsPower distribution line transmissionPower qualityLow speed
Owner:POWERMAX GLOBAL
System, method, and adapter for creating fault-tolerant communication busses from standard components
A system, method, and adapter for creating fault-tolerant communication busses from standard components, are described. Fault-tolerant interface logic is provided for transmitting and receiving system health and system management signals to and from a module that is designed to be connected to a single RS-485 bus. The fault-tolerant interface logic enables the module to selectively communicate via at least two redundant half-duplex, multipoint, differential RS-485 busses. The fault-tolerant interface logic includes a first RS-485 transceiver connected to a first RS-485 bus, a second RS-485 transceiver connected to a second RS-485 bus, selector logic responsive to a control signal for selecting one of the first and the second busses to receive signals from and for transmitting the received signals to the module, and software logic executable on a baseboard management controller (BMC) chip. The software logic includes control logic for monitoring the health of the selected bus and for providing the control signal to the selector logic.
Owner:EGENERA
Spa controller computer interface for spas
Owner:GECKO ALLIANCE GROUP
Remote automatic centralized control monitoring meter reading system
InactiveCN101285849AAvoid lossPowerful data management functionTelephonic communicationTime integral measurementData acquisitionData memory
The invention relates to a long-distance automatic centralized control monitoring meter reading system, which is characterized in that: data collection terminals take an embedding type processor as the core and is provided with an external data memory EEPROM and two extension RS-485 serial port communication modules; the modules are provided with corresponding communication interfaces with one interface used to hang electronic electric energy meters and the other interface connected with a data concentrator; at least two electronic electric energy meters are hung under the data collection terminals; the data concentrator takes an embedding type ARM processor as the core and at the same time, is provided with peripheral equipment including a program memory FLASH and a data memory SDRAM, an extension RS-485 serial port communication module and a long-distance communication module; the RS-485 serial port communication module is connected with the data collection terminals; at least two data collection terminals are hung under the data concentrator; a long-distance management upper computer, based on an ordinary PC and provided with a database server, is communicated with two data concentrators at least through the long-distance communication module.
Owner:JIANGSU ZHONGDIAN SCI & TECH
Embedded type integrated monitoring and maintenance system of concrete block forming production line
InactiveCN101782755AImprove efficiencyMeet real-time row requirementsComputer controlSimulator controlComplex programmable logic deviceUSB
The invention discloses an embedded type integrated monitoring and maintenance system of a concrete block forming production line, which is based on a B / S (browser / server) mode network function structure model, comprises various on-site signal acquisition modules, an embedded type monitoring and maintenance unit and a remote monitoring diagnosis and maintenance center, and concretely comprises anARM9 main processor, a DSP (digital signal processor) slave processor, an Ethernet module, an USB (universal serial bus) camera module, a RS-232 / RS-485 level switch module, a data storage module, a program storage module, a video information module, an audio information module, an HPI (hardware platform interface) bus, a CPLD (complex programmable logic device) logic controller module, a local industrial personal computer (IPC) and a remote server. The invention has the advantages of low cost, strong portability, high configurability, complete functions, compact system and modularized design,and can meet the real-time requirement of high-speed data.
Owner:NANJING UNIV OF SCI & TECH
Online collecting and monitoring method of energy measuring data and its system
InactiveCN107967801ARich human-computer interaction interfaceLow costElectric signal transmission systemsActive radio relay systemsCarrier signalData acquisition
The invention discloses an online collecting and monitoring system of energy measuring data, which is composed of two parts, wherein the one part is a hardware platform centered by a MCU control module, and the other part is a management center platform centered by a master station; the management center platform can remotely manage the collector through a GPRS module, the hardware platform can perform data collection on an intelligent meter by 485 method and a wave carrier method and report to the management center; the online collecting and monitoring system is characterized in that the hardware platform comprises an embedded controller circuit, an RS-485 communication circuit, a GPRS communication circuit, an electricity carrier wave communication circuit, a clock circuit, a display circuit, a power circuit, a keyboard input circuit, a JTAG debugging circuit and a storage circuit; the collector adopts two communication methods totally, and two communication methods carry out the data communication by a serial port; the RS-485 communication circuit can modulate the signal to be symmetrical form so as to carry out signal transmission in the manner of balance sending; then the signal is received by a differential way; a half-duplex operation mode of master and slave structures is adopted.
Owner:EAST CHINA UNIV OF TECH
Method and guiding device for diesel traction engine optimizing operation
InactiveCN101214819ARuns fast, accurate and efficientEffectiveElectrical controlMachines/enginesCombustionSimulation
The invention discloses an operation optimization method and an instruction device of an internal-combustion traction locomotive. The device adopts RS-485 serial communication mode to collect the train running information of current time, combines the static storage information in basic databases, adopts the operation optimization method of the internal-combustion traction locomotive with the cores of the real-time control algorithm for train running with energy saving. Namely by designing the real-time control algorithm based on combining the methods including the preliminary judgment on the operation condition of the locomotive and the handle position by the parameters including balance slope and target velocity, the expert control principle, the forward calculation of train operation and the calculation meeting the duration, the invention calculates on -line the guide proposal of the train operation optimization based on the current running environment and condition, real-time displays the operating guidance curve of velocity versus distance and the operating guidance curve of traction speed versus distance for the frontward 5 kilometers of the train running. The system can ensure that the train restores to run on schedule and runs in energy conservation via the dynamic adjustment on operation strategy or target velocity.
Owner:BEIJING JIAOTONG UNIV
Intelligent bridge between PSTN and asynchronous communication channel
InactiveUS20060141940A1Tariff metering apparatusAnalysing/displayingAsynchronous communicationTelecommunications link
An intelligent communications bridge device (“Meterpod”) of a remote Supervisory Control and Data Acquisition (SCADA) system advantageously facilitates monitoring, reporting and control of public utility meters. The Meterpod is an intelligent gateway that installs onto existing metering and monitoring equipment and provides a wireless communications link from the remote equipment being monitored or controlled to the host computer or program tracking or controlling the device providing clear advantages over existing remote telemetry equipment in that it can (1) support any wireless communications protocol, including CDMA, GSM / GPRS, VSAT, and GPRS standards, (2) be installed and configured in minutes by regular maintenance personnel, and (3) provide control capabilities beyond the remote device by utilizing a broad array of additional interfaces (RJ-11, Ethernet, RS-232 and RS-485) that all come standard, supporting customer sites that cannot be monitored using existing fixed wireless or radio frequency (RF) monitoring solutions.
Owner:AXISSCOMM
RS-485 multipoint communication method
InactiveCN1527561AImprove reliabilityImprove testabilityError detection onlyData switching networksByteCyclic redundancy check
The RS-485 multipoint communication method includes balanced sending and differential receiving for the communication between one master machine and several slave machines. In the sending end, upper layer data is first received, protocol head is added before the data byte and CRC check is added behind the data byte, before initializing treatment and sending the data frame. In the receiving end, after the data frame is received, the frame decomposing treatment including frame head distinction, dingle board address comparison, frame length checking, data byte determination and CRC is performed before the corresponding treatment of received pure load. The present invention raises communication efficiency, facilitates RS-485 debugging, locates error correctly and increases the measurement performance while ensuring the reliability of multipoint communication.
Owner:ZTE CORP
Embedded type teaching programming device and method for welding robot
The invention discloses embedded type teaching programming device and method for a welding robot. The device comprises a core board and an interface board, wherein the core board consists of a central processing unit, an ex-patulous memorizer and a clock power fail protection circuit; the interface board consists of an Ethernet interface, an RS-485 serial bus interface, an RS-232 interface, a USB interface, a liquid crystal display interface, a touch screen interface, a matrix keyboard interface, a JTAG interface, a power supply, a reset circuit and a safety control circuit; and a robot teaching module, a file editing module, a file management module, a user management module, a communication module and an auxiliary functional module are provided in the method. The invention has the advantages of high integrated level, strong antijamming capability, favorable human-machine interaction, convenient expansion and the like, can configure the two communication modes of an RS-485 bus and the Ethernet, and can meet the requirement for teaching programming of the welding robot.
Owner:SOUTHEAST UNIV
Automatic identification method of electric power meter on RS-485 bus
InactiveCN101969429AReduce workloadLow technical requirementsData switching networksElectric power systemCorrect response
The invention discloses an automatic identification method of an electric power meter on RS-485 bus, wherein different protocols and communication rates are used for the following operations: firstly using broadcast address to distribute a reading meter order by a collecting apparatus; then if no response received, no electric power meter in match condition exists; if correct response is received, acquiring a meter address from a response message to be added into a meter address list of the collecting apparatus; if a messy code response which is not matched with the response format in the protocol is received, a plurality of electric power meters in match condition exist, taking AAAAAAAAAAAA as initiation meter address, and entering recursive query test; and after the test completes, converging to obtain a group of electric power meter address, protocol and communication rate list. The application of the identification method can save corresponding artificial maintaining work.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +1
Method for Setting Home Code in Network System and Device for Network
InactiveUS20090160626A1Efficiently manage informationEfficient managementCircuit arrangementsElectric controllersPower line networkRemote control
The present invention relates to a method for setting a home code in a network system and a device for a network system. The method and device allow a user to conveniently remote control the operation of and monitor the operational state of appliances. Thanks to the method and device, a user, for example, who is locating at home or out-of-home, can control the operation or monitor the operational state of various appliances such as refrigerator or laundry machine through a living network installed at home, such as RS-485 network, a low power RF network, or a power line network. The method of setting a home code in a network system includes a first step of producing a random home code value using a random numbers generation algorithm, a second step of checking whether the random home code value is a unique code, and a third step of setting the random home code value as a home code of all devices connected to a network when it is found that the random home code value is a unique code as the result of checking, so that all the devices connected to the same network have the same home code. The present invention is very useful in ability of effectively setting and managing a unique home code in a network.
Owner:LG ELECTRONICS INC
Finger vein villa management system
InactiveCN103136821AImprove performanceImprove reliabilityIndividual entry/exit registersHuman bodyInternal memory
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.
Owner:CHANGSHU ANZHI BIOLOGICAL IDENTIFICATION TECH
Arc-control device and arc-control method applied in photovoltaic combiner box
The invention relates to an arc-control device applied in a photovoltaic combiner box. The arc-control device particularly comprises a confluence branch which is formed by electrically connecting a photovoltaic negative electrode busbar, a special photovoltaic fuse, a special photovoltaic diode and a photovoltaic positive electrode busbar in sequence, and a detection and control circuit which is formed by a resistor divider module, a voltage comparison module, a timer module, a signal processing module, an RS 485 communication module, a two-input OR gate, a driving circuit module and an IGBT (Insulated Gate Bipolar Transistor) module; and the invention also relates to a combiner box arc-control method applying the arc-control device.
Owner:ZHUHAI SINGYES GREEN BUILDING TECH +5
Medical facility information management apparatus and method
InactiveUS20050206505A1High trafficFrequency-division multiplex detailsTime-division multiplexEnvironmental noiseManagement indicators
A master controller for medical staff management indicators has a central data collection and display facility located at a nurse's station or equivalent facility and includes any number of satellite devices located in examining rooms or the equivalent. Each satellite can respond to master controller polling by sending one of a multiplicity of possible messages that are received and processed to generate a displayed satellite status summary at the nurse's station. Interconnection between the nurse's station and the satellites preferably uses a single twisted pair of wires in a bus configuration compatible with bus standard RS-485. Data rates and message structure are selectable according to system size, environmental noise, and data confidence requirements.
Owner:GE SECURITY INC
Array type multipoint temperature monitoring system
InactiveCN101551277AEasy compositionSimple structureThermometer detailsThermometers using electric/magnetic elementsMicrocontrollerData display
The present invention discloses a array type multi-point temperature monitoring system, including a plurality of monitoring devices, each of which is connected with a temperature sensor measuringline cable of 1000m at longest, each measuringline cable may drive at most 50 of single bus temperature sensors, the temperature sensor is capable of detecting the temperature information of the position where the temperature sensor locating, and the temperature data is transmitted to the monitoring device with a singlechip as a control kernel through a single bus data transmission protocol. The monitoring device has functions of data display, data memory, parameter enactment, overrun alarm, data transmission and the like. The monitoring devices combine a network through RS-485 communication bus, and are connected to a computer host by RS-485 / RS-232 protocol converters, and RS-232 bus to form the array type multi-point temperature monitoring system. The array type multi-point temperature monitoring system is used for situation with a large area multi-point temperature monitoring requirement.
Owner:安徽理工大学高科技中心
Supervisory control and data acquisition protocol converter
ActiveUS8219214B1Avoid error accumulationAccurate informationElectric devicesComputer controlData acquisitionDisplay device
A supervisory control and data acquisition protocol converter having encoded meter register input ports which are able to interrogate, read, and retain data stored in viscous fluid or gas meter registers which communicate with the Automatic Meter Reading (AMR) protocols and convert that data upon request to an industrial monitoring and control system protocol such as MODBUS®, DF1, EtherNet / IP™, or ADAM 4000. The present art further provides serial RS-232C and RS-485, and Ethernet ports whereby said data may be transmitted and / or the apparatus may be setup according to user defined specifications. The present art apparatus also provides industrial standard pulse (0-5 volts) and current (4-20 milliamps) inputs. The present art further provides a user configurable display which may display any or only a portion of the aforesaid data along with other user desired data. The apparatus further serves a web page over the Ethernet port with the aforesaid data populating a table.
Owner:MIMLITZ JAMES E
Battery charging and discharging tester
InactiveCN103033760AImprove performanceShorten the development cycleElectrical testingBattery chargeTest battery
The invention discloses a battery charging and discharging tester which is used for testing charging and discharging performance of a to-be-tested battery. The battery charging and discharging tester is provided with an upper computer, a data transfer unit and a lower computer, wherein the upper computer is connected with the lower computer through the data transfer unit with serial bus RS-485 adopted. The upper computer is connected with the lower computer through the serial bus RS-485 to finish data communication between the upper computer and the lower computer. The lower computer includes a charging unit, a discharge load unit, a main control unit and the to-be-tested battery, wherein the charging unit, the discharge load unit, and the to-be-tested battery are respectively connected with the main control unit, and the to-be-tested battery and the discharge load unit are connected with the charging unit in sequence. Compared with the prior art, the battery charging and discharging tester has the advantages of being simple, convenient, reliable in quality, stable in running, high in measurement accuracy, reasonable in design, high in automation level and the like.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Pre-purchased power controller
InactiveCN101794480ARealize automatic meter readingRealize acquisitionApparatus for hiring articlesData memoryMemory module
The invention discloses a pre-purchased power controller, which is characterized in that an MCU microprocessor is arranged, the peripheral devices of the MCU microprocessor comprise a signal conditioning module, a data memory module, a clock chip, a non-contact IC card reading and writing module, a liquid crystal display module, a power supply and cutoff executing module, a cell phone communication module, an infrared communication module, a multi-way switch, an RS 485 communication interface, a pulse acquisition interface and a key module. The invention can realize automatic meter reading and power fare calculation, can give alarm or supply and cut off power according to the remaining sum of the prepaid power fare, can communicate, send alarm information by using cell phone short messages and conduct grid monitoring, can modify parameters through infrared, and has the function of accepting the non-contact IC card recharge operation.
Owner:HEFEI UNIV OF TECH +1
Method and system for batch online recovery and software online upgrading
InactiveCN104899065AAchieve retransmissionQuickly realize remote online updateProgram loading/initiatingRedundant operation error correctionDevice typeElectricity
The invention discloses a method and a system for batch online recovery and software online upgrading. The system includes a centralized control device and a plurality of remote devices connected through an RS 485 bus; the centralized control device generates upgraded mirror image documents with different device types and different software editions through processing an upgraded software encoding format, issues a software online upgrading command and a data frame of through a communication protocol, and controls the online upgrading process of all remote devices; the centralized control device recovers the software of the remote device to a previous edition through directly issuing the software online recovery command. The remote device automatically completes the software downloading, detection, storage, verification, backup and update processes and is not influenced by power down; the remote device is failed in upgrading, and still able to automatically recover the original edition software and recover the device working state to maintain the normal running; through obtaining the edition information of all devices, the centralized control device judges if the upgrading is successful or not. The method and the system can realize the batch upgrading and recovery on the software of a plurality of remote devices.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD
A Program Upgrading Mechanism for Peripheral Devices Based on Microcontroller Without External Memory
ActiveCN102298526ARealize remote upgradeImprove versatilityProgram loading/initiatingMicrocontrollerCommunications system
The invention provides a method for remotely upgrading the program of the peripheral equipment of a single-chip microcomputer without an externally expanded memory. A master-slave device communication system, including a host device and multiple peripheral devices, in which a stable communication is established between the host device and each peripheral device through physical means (such as RS-232 / RS-485 / CAN bus, etc.) Connection, and the program design of the peripheral device adopts the BootLoader program to guide the main program to start. With the help of the storage space of the host, the communication channel between the peripheral device and the host is used. The two parties communicate according to the agreement agreed in advance, and the host recognizes it. And be controlled to realize the remote upgrade of the peripheral device program. The advantage of adopting the present invention is that there is no need to make any changes to the host hardware and peripheral hardware, and the whole mechanism is completed through the interaction of software and protocols, which has good versatility and strong expandability.
Owner:XIAMEN YAXON NETWORKS CO LTD
Variable-pitch controller for wind power generator
InactiveCN101576059AImprove operating conditionsFlexible and Efficient CaptureWind motor controlMachines/enginesEngineeringElectric generator
The invention provides a variable-pitch controller for a wind power generator and relates to the technical field of the wind power generation device, which comprises a TMS320LF2407 single chip microcomputer (SCM) of which the interfaces are respectively connected with a switching-value isolated input circuit, an analog isolated conditioning circuit, a pulse value conditioning circuit, a serial communication protocol conversion circuit and a switching-value isolated output circuit which can be connected with a relay. The TMS320LF2407 SCM is connected with external control circuits by RS 485 serial ports and a CAN communication drive circuit which is connected with a main controller of the system. The switching-value isolated input circuit, the analog isolated conditioning circuit and the pulse value conditioning circuit are respectively connected with sensors. The invention also comprises relative software. The variable-pitch controller for a wind generator adjusts the power by controlling the change of the angel of attack of blades and realizes the starting, stopping and emergency treatment of the wind power generator by controlling the pitch angel and the speed, thus ensuring that the wind power generator is in good operation.
Owner:BAODING TIANWEI GRP CO LTD
Half-duplex automatic receiving-transmitting switching circuit of RS485
InactiveCN101719112AGuaranteed to receive data correctlyDigital computer detailsElectric digital data processingCurrent limitingEngineering
The invention provides a half-duplex automatic receiving-transmitting switching circuit of an RS485, which comprises a microprocessor, an RS 485 communication chip and an RS 485 bus, wherein the data receiving pin of the microprocessor is connected with the receiver output end of the RS 485 communication chip; the data transmitting pin of the microprocessor is connected with the base of a triode through a current-limiting resistor; the collector of the triode is connected with the receiver output enabling end and a transmitter output enabling end of the RS 485 communication chip, and is connected with a power supply through a third resistor at the same time; the emitter of the triode is earthed; the transmitter input end of the RS 485 communication chip is earthed; the pin A of the RS 485 communication is connected with the power supply through a pull-up resistor; and the pin B of the RS 485 communication chip is earthed through a pull-down resistor. The half-duplex automatic receiving-transmitting switching circuit of the RS485 provided by the invention can automatically switch the working states of transmitting and receiving.
Owner:北京东方信联科技有限公司
Vehicle monitoring system
InactiveCN101000695AIncrease profitLow costTelevision system detailsRegistering/indicating working of vehiclesMonitoring systemCentral unit
A vehicle monitoring system is prepared as connecting video camera module to vehicle terminal in communication mode through RS-485 interface for up-transmitting partial shot image to central unit through vehicle terminal and mobile communication network, labeling image files being not up-transmitted to central unit and being stored in image storage to be A type of important file by digital signal processor in video camera module and image files being up-transmitted to be B type of important file, allowing newly shot image to cover B type of important file when storage space of image storage is full.
Owner:SHENZHEN SEG SCI NAVIGATIONS CO LTD
Device and method for forecasting freezing on surface of ground plane based on multisensor
ActiveCN101866525AThe forecast information is accuratePracticalAlarmsNerve networkMathematical model
The invention provides a device and a method for forecasting freezing on the surface of a ground plane based on a multisensor. The device comprises a simulated plane wing, multiple temperature sensors, a temperature signal conditioning board, a humidity sensor, a humidity signal conditioning board, a wind speed sensor, an RS-485 serial communication interface and a computer system. In the device and method for forecasting freezing on the surface of the ground plane based on the multisensor provided in the invention, ice and snow weather forecast data of the airport region are combined with factors such as surface temperature of ground objects, atmosphere humidity and wind speed and the like to be served as input of mathematical model of the freezing forecast on the surface of the ground plane; the probability of freezing currently and in a short time in the future can be obtained through neural network forecast algorithm, therefore a short-time forecast can be conducted on freezing on the surface of the ground plane in the small region of the airport, timely monitoring can be carried out on the overnight planes on the parking apron so as to give freezing early warning signals in advance, thus being convenient for ground service departments in the airport to carry out deicing work in advance.
Owner:CIVIL AVIATION UNIV OF CHINA
RS-485 communication interface polarity detection device, method and chip
ActiveCN103424660ALow costNo change in performanceElectrical testingCommunication interfaceElectrical polarity
The invention discloses an RS-485 communication interface polarity detection device, an RS-485 communication interface polarity detection method and an RS-485 communication interface chip, wherein the RS-485 communication interface polarity detection device includes a clock circuit and a polarity detection circuit; the polarity detection circuit times signals received by a receiver unit through using a clock provided by the clock circuit, and judges the polarity of an RS-485 communication interface according to the lasting time of '' 1 '' or '' 0 '' electric levels in the signals; and therefore, the RS-485 communication interface chip can be adjusted inside, and with no cost increased and no performance index modified, requirements of a non-polarity RS-485 system can be satisfied.
Owner:HANGZHOU VANGO TECH
Conference room intelligent control method based on voice recognition
InactiveCN103064379AHigh degree of intelligenceAdjust the volumeSpeech recognitionProgramme total factory controlRS-485Digital mixing console
Owner:INFORMATION & COMM COMPANY OF STATE GRID HEILONGJIANG ELECTRIC POWER COMPANY +1
Board level testing system
ActiveCN101937222AImprove protectionReduce work intensityElectronic circuit testingTotal factory controlSemi automaticData acquisition
The invention discloses a board level testing system which comprises a testing upper computer, a testing controller and a subrack back panel, wherein the testing upper computer is connected with the testing controller through a data acquisition card and connected with a circuit board to be tested through an Ethernet and RS-232 which are provided by the testing upper computer and RS-485 and RS-422 which are provided by a data communication card; the testing controller is respectively connected with the data acquisition card in the testing upper computer and the subrack back panel and used for carrying out level conversion on an excitation signal required by testing and a testing output signal so as to provide a controlled power supply for the circuit board to be tested and a level conversion circuit; and the subrack back panel is respectively connected with the testing controller and the circuit board to be tested so as to accommodate a testing subrack of the circuit board to be tested. The system can guarantee the protection of the circuit board to be tested during the board level testing, is a computer aid based full-automatic or semi-automatic testing system, can reduce the working intensity of testing personnel, improve the efficiency and reduce testing human error and has higher use value especially for circuit boards with complicated functions.
Owner:TRAFFIC CONTROL TECH CO LTD
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