Support for flow meter scale network technology and the market demand

Abstract: the flow meter scale network technical support and the market demand information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Meter network, such as the electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, etc. , are suitable for long distance measurement and control of the use of instruments, instruments and control skills, the modern computer, network communication and microelectronics skills blend depth results. The network. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the flow meter scale network technical support and market demand for the article details. Meter network, such as the electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, etc. , are suitable for long distance measurement and control of the use of instruments, instruments and control skills, the modern computer, network communication and microelectronics skills blend depth results. Networked equipment both to like usually instrument quantity according to the set procedures for the active measurement appeared, handling, storage and measurement results and the status of the control; Together with important network using characteristics, authorized instrument use, through the Internet could obtain the long-distance function of instrument operation, measurement results and the real-time monitoring instrument, set parameters and fault diagnosis, control the dynamic release information on the Internet. They are the same with the computer, become independent nodes of the network, and easily can directly connect with the nearest network communication cables and wires and & other; Plug and play & throughout; , direct field test data will be sent to get to the Internet; Users through the reader or fit standard real-time applications can read the information ( Contains the data after processing, instrument panel drawing, etc. ) 。 Networked instrument features: according to the Internet in the measurement and control system of the front end module not only signal collection and handling, also as a whole for signal analysis and transmission, because it to a function powerful microprocessors and an embedded operating system to support. On the platform, the use of various end can easily measure the increase of function module, deleting, and different network transmission way to choose. Secondly, according to the measurement and control system of Internet zui for significant characteristics, signal transmission way to do this change happened. According to the measurement and control system for measurement of the Internet, such as the control signal transmission, is based on the public on the Internet. A front-end embedded module, system of measure data security useful transmission is possible. Again, according to the measurement and control system of the Internet on the expression of measured results and output have greater improvement, on the one hand, no matter where, using all can pass the client easily read all kinds of real-time data, to understand the performance of the equipment now; On the other hand, in the client's control center, with the intelligent software and database system to analyze the measured results can be invoked, and for the use of control instructions or resolution plan supply help. Access to the Internet or Ethernet way: measures for the planning of networked instrument is embedded into the instrument of the embedded system, let it become the center of the measurement and control. Usually, the embedded instrument connected to the Internet or Ethernet into network instrument has three measures: ( 1) Made up of senior 32-bit MCU embedded instrument, because there are satisfy the operation of the capital to expand, all TCP/IP protocol family can do system, can therefore become a direct access to the Internet network instruments, but development is difficult; （ 2) About the low grade eight institutions into embedded instruments, choose special network ( Such as RS - 232、RS- 485, Profibus, etc. ) Several embedded instruments are connected to the PC, the PC as a gateway, and convert the information on the network by the PC for TCP/IP protocol packets sent to the completion of the Internet information sharing, but must be specifically with a PC to transform to the agreement; （ 3) Consists of 8 bits single chip microcomputer direct Internet access to the embedded network instrument, the benefit is the ability to use the one based on 8-bit microcontroller measurement equipment, after a plus network chip, direct drive network interface chip, but take up capital ( ROM、RAM、CPU） Request more, single-chip microcomputer has meet the fast speed. Support network interface chip: network interface chip using RTL8019AS RELTEK company, because of its excellent function, cheap price, ideal chip is used for Ethernet communications. （ 1) Main function with Ethernet Ⅱ IEEE802. 3 standard; For full-duplex communication interface, transceiver can arrive at the rate of 10 megabits per second; 16 k of built-in SRAM, used to send and receive buffer, down to the speed of the main processor request; Support 8/16 of a data bus, eight to suspend the request line and 16 I/O base address selection; Can end the physical frame structure, decoding, the composition of CRC and validation, data transceiver, etc. , can be together after switch on the twisted-pair send and accept data. （ 2) Can be divided into internal structure RTL8019AS long-distance DMA interface, local DMA interface, the MAC ( Media visit control) Logic, data coding, decoding logic and other ports. Long-distance DMA interface refers to the single chip microcomputer bus of RTL8019AS internal RAM, speaking, reading and writing, that is part of the ISA bus interface.

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