CN104678836A

CN104678836A - High-speed data acquisition card

Info

Publication number: CN104678836A
Application number: CN201410689787.7A
Authority: CN
Inventors: 鲁建业
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2015-06-03

Abstract

The invention relates to a high-speed data acquisition card, which belongs to the technical field of modern electronics. According to the high-speed data acquisition card, a signal processing circuit, a multi-way selecting switch and an A/D (Analog to Digital) converter are connected in sequence, a clock circuit, a CPLD (Complex Programmable Logic Device) control circuit and an FIFO (First Input First Output) buffer are connected in sequence, the CPLD control circuit is respectively connected with the A/D converter and the multi-way selecting switch, and the FIFO buffer is connected with the A/D converter. According to the high-speed data acquisition card which is provided by adopting a CPLD and an FIFO device, most control logic is integrated into a CPLD chip, so that the quantity of devices on an expansion card is greatly reduced, additionally, the system cost is reduced, and the system reliability is improved; portable test equipment with high density and small size can be constructed, the high-speed data acquisition card can be widely applied to various occasions for testing of a weapon control system and the like, and quick real-time data acquisition and analysis can be performed on analog signals of the control system.

Description

A kind of high-speed data acquisition card

Technical field

The present invention relates to modern electronic technology field, be specifically related to a kind of high-speed data acquisition card.

Background technology

Testing apparatus is one of topmost subsystem in the second stage of system, its operational performance directly having influence on whole armament systems whether working properly, therefore develop that volume is little, compact conformation, portable test equipment just become main target, conventional acquisition scheme is primarily of two kinds:

(1) by the directly actuated acquisition scheme of single-chip microcomputer, this is the most the most frequently used control program, due to the participation that all will have single-chip microcomputer of sampling at every turn, need the time of true single-chip microcomputer, affect its data processing, and for the control of hyperchannel, multiple A/D converter, because the information of required process is more, then more inconvenient.

(2) acquisition scheme controlled by DMA, this hardware is complicated, if with single-chip microcomputer with the use of, need single-chip microcomputer to have bus suspension function, otherwise also need to carry out bus switch, affect the timely process of data.

Summary of the invention

In order to solve the problem, the present invention is intended to propose a kind of high-speed data acquisition card.

Technical program of the present invention lies in:

A kind of high-speed data acquisition card, signal conditioning circuit, multidiameter option switch and A/D converter connect in turn, and clock circuit, CPLD control circuit and FIFO buffer connect in turn; Wherein, CPLD control circuit is also connected respectively with A/D converter and multidiameter option switch; FIFO buffer is also connected with A/D converter.

Preferably, described high-speed data acquisition card adopts+3V analog power and+3V digital power.

Preferably, described A/D converter selects 8-bit High-Speed A/D converter AD9283, wherein integrated high-performance sampling and hold amplifier, and input signal adopts single input or Differential Input.

Preferably, described CPLD control circuit adopts EPM7128SLC84-6CPLD as kernel processor chip, and its operating voltage is+5V, and is provided with jtag interface.

Or preferably, described FIFO buffer adopts high speed, low-power consumption, first-in first-out storage chip CY7C4261, and its capacity is 16kX9 position, read-write cycle 10ns.

Or preferably, described multidiameter option switch selects eight to select a multidiameter option switch ADG508A.

Or preferably, described high-speed data acquisition card sample frequency is 100MHz.

Technique effect of the present invention is:

The present invention adopts CPLD and FIFO device to provide a kind of high-speed data acquisition card, most of steering logic is integrated in CPLD chip by this high-speed data acquisition card, substantially reduce the number of devices on expansion card, reduce system cost simultaneously, improve the reliability of system, this high-speed data acquisition card can also build the convenient test equipment of this density, small size, the multiple occasions such as the test of weapon control system can be widely used in, quick, real-time Data acquisition and issuance is carried out to the analog signals of control system.

Accompanying drawing explanation

Fig. 1 is the system connection layout of a kind of high-speed data acquisition card of the present invention.

Embodiment

Wherein, high-speed data acquisition card adopts+3V analog power and+3V digital power.A/D converter selects 8-bit High-Speed A/D converter AD9283, wherein integrated high-performance sampling and hold amplifier, and input signal adopts single input or Differential Input.CPLD control circuit adopts EPM7128SLC84-6CPLD as kernel processor chip, and its operating voltage is+5V, and is provided with jtag interface.FIFO buffer adopts high speed, low-power consumption, first-in first-out storage chip CY7C4261, and its capacity is 16kX9 position, read-write cycle 10ns.Multidiameter option switch selects eight to select a multidiameter option switch ADG508A.High-speed data acquisition card sample frequency is 100MHz.

Claims

1. a high-speed data acquisition card, is characterized in that: signal conditioning circuit, multidiameter option switch and A/D converter connect in turn, and clock circuit, CPLD control circuit and FIFO buffer connect in turn; Wherein, CPLD control circuit is also connected respectively with A/D converter and multidiameter option switch; FIFO buffer is also connected with A/D converter.

2. as claim 1 high-speed data acquisition card, it is characterized in that: described high-speed data acquisition card adopts+3V analog power and+3V digital power.

3. as claim 1 high-speed data acquisition card, it is characterized in that: described A/D converter selects 8-bit High-Speed A/D converter AD9283, wherein integrated high-performance sampling and hold amplifier, input signal adopts single input or Differential Input.

4. as claim 1 high-speed data acquisition card, it is characterized in that: described CPLD control circuit adopts EPM7128SLC84-6CPLD as kernel processor chip, and its operating voltage is+5V, and is provided with jtag interface.

5. as claim 1 high-speed data acquisition card, it is characterized in that: described FIFO buffer adopts high speed, low-power consumption, first-in first-out storage chip CY7C4261, and its capacity is 16kX9 position, read-write cycle 10ns.

6. as claim 1 high-speed data acquisition card, it is characterized in that: described multidiameter option switch selects eight to select a multidiameter option switch ADG508A.

7. as claim 1 high-speed data acquisition card, it is characterized in that: described high-speed data acquisition card sample frequency is 100MHz.