872 results about "RS-485" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention discloses a conference room intelligent control method based on voice recognition, and belongs to the field of intelligent office working. The conference room intelligent control method based on the voice recognition aims to solve the problems that existing office facilities in a conference room have respective defects on the control of screen display, sound equipment, lighting and air-conditioning, and are low in degree of intelligence. The conference room intelligent control method includes the following steps of collecting a voice command in the conference room, converting the voice command to characters through voice recognition software, and enabling a command analysis program to continuously match the recognized characters and a prestored command. If the prestored command is a control command of the screen display, then one way of a plurality of display signal source hosts is chosen to enable the control command to pass; if the prestored command is a control command of the sound equipment, the volume can be adjusted through a universal serial bus (USB) interface to drive a digital mixing console; if the prestored command is a control command of the lighting, a relay is driven to control the on-off state of lights; and if the prestored command is a control command of the air-conditioning, a startup or shutdown command is sent to a hang ceiling type air-conditioning indoor unit through a recommend standard (RS) 232 interface or an RS 485 interface. Therefore, the startup or shutdown of a certain hang ceiling type air-conditioning indoor unit can be independently controlled.

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.