B type LXI (LAN eXtensions for Instrumentation) synchronous data acquisition instrument

Abstract

The invention relates to a B type LXI (LAN eXtensions for Instrumentation) synchronous data acquisition instrument, comprising a B type LXI interface module, a synchronous data acquisition instrument function module and an LED (Light-emitting Diode) indication module, wherein the B type LXI interface module comprises an embedded type processor circuit, an IEEE (Institute of Electrical and Electronic Engineers) 1588 triggering management circuit, a FLASH storage circuit, a DDR (Double Data Rate) dynamic storage circuit and an LAN (Local Area Network) interface communication circuit; and an analog acquisition circuit is used for acquiring an analog signal, carrying out programmable gain and programmable filtering on the analog signal, and then carrying out AD (Analog to Digital) sampling and transmitting sampling data into an FPGA (Filed Programmable Gate Array) control circuit. The FPGA control circuit is used for simulating operation control of an acquisition channel; an SDRAM (Synchronous Dynamic Random Access Memory) is used for storing and acquiring conversion data; and a PCI (Programmable Communication Interface) is used for connecting the B type LXI interface module and the synchronous data acquisition instrument function module. According to the invention, based on an LXI bus standard, the B type LXI synchronous data acquisition instrument is provided.

Description

technical field [0001] The invention relates to a class B LXI bus synchronous data acquisition instrument circuit. Background technique [0002] Agilent and VXI Technology Corporation proposed a new instrument bus-LXI (LAN eXtensions for Instrumentation) in 2004. LXI instruments do not need a special backplane bus chassis and zero-slot controller, and directly use the standard LAN interface of a general-purpose PC, which greatly reduces development and application costs. And LAN is the industry's most stable and open industry standard with the longest life cycle and is still developing. It is easy for manufacturers to transplant existing instrument products to the LAN platform. The measurement and control system provides convenience. At the same time, the LXI bus standard defines the precise time synchronization function based on IEEE1588, and introduces the concept of time-based triggering for the first time in the field of test and measurement, making it easy to build a ...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of modern science and technology, especially in aerospace and military fields, the demand for signal acquisition amplitude and accuracy is getting higher and higher, and users' requirements for data acquisition products are also getting higher and higher, especially in distributed measurement and control. In the system, the test instrument is also required to have remote program control function. Existing buses such as GPIB, PCI / PXI, etc. cannot meet the requirements well. System requirements, LXI bus synchronous data acquisition card came into being

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