Synchronous high-precision dynamic signal data acquisition functional card

Abstract

The invention discloses a synchronous high-precision dynamic signal data acquisition functional card. The synchronous high-precision dynamic signal data acquisition functional card is characterized by comprising more than one analog signal input channel, a data acquisition circuit and a PXI (peripheral component interconnect extensions for instrumentation) interface circuit, wherein each of the analog signal input channel comprises an analog signal input port and a signal conditioning circuit which are connected, the signal conditioning circuits are connected with the data acquisition circuit which is connected with the PXI interface circuit, and the PXI interface circuit is connected with a PXI bus. The synchronous high-precision dynamic signal data acquisition functional card is good in stability, high in transmitting speed, capable of transmitting large volume of data, supportive to hot plug, low in cost, and easy to expand and upgrade.

Description

technical field [0001] The invention relates to a data acquisition function card, in particular to a synchronous high-precision dynamic signal data acquisition function card, which belongs to the fields of data acquisition, signal analysis and processing. Background technique [0002] In the field of measurement and control systems, measurement and control bus refers to a bus developed with the main goal of composing measurement and control systems. Since the advent of digital computers, various bus standards have been introduced, such as PC, ISA, and PCI bus. Although adding various I / O function module boards to PC, ISA, and PCI bus systems can also form a measurement and control system, this is not the main purpose of these bus standard designs. Existing buses designed for measurement and control systems mainly include PCI, GPIB, VXI and other buses. In actual operation, the data acquisition function card is connected to the measurement and control bus, and the informati...

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Problems solved by technology

[0003] However, the existing bus has the following defects: the GPIB bus is essentially an expansion and extension of the functions of traditional instruments through computers, and its transmission rate is generally lower than 500kB / s, which is only suitable for measurements that do not require high computer data transmission rates; The PCI bus directly uses the standard industrial computer bus, which has poor stability, does not support hot plugging, and does not have the bus performance required by the instrument; the VXI bus requires a large investment intensity, high cost, and is not easy to expand and upgrade

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