Design of drawer type temperature acquisition module based on FPGA

WANG Chuang; REN Yong-feng; LI Hui-jing

doi:10.13873/J.1000-9787(2015)12-0079-04

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Design of drawer type temperature acquisition module based on FPGA

更新时间：2025-09-11

- Design of drawer type temperature acquisition module based on FPGA
- Vol. 34, Issue 12, Pages: 79-82(2015)
- 作者机构：
  
  1. 中北大学仪器科学与动态测试教育部重点实验室
  2. 中北大学电子测试技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2015)12-0079-04
  CLC： TP274.2
- Published：2015
- 稿件说明：
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[1]王闯,任勇峰,李辉景.基于FPGA的屉式温度采集模块设计[J].传感器与微系统,2015,34(12):79-82.

WANG Chuang, REN Yong-feng, LI Hui-jing. Design of drawer type temperature acquisition module based on FPGA[J]. 2015, 34(12): 79-82.
[1]王闯,任勇峰,李辉景.基于FPGA的屉式温度采集模块设计[J].传感器与微系统,2015,34(12):79-82. DOI： 10.13873/J.1000-9787(2015)12-0079-04.

WANG Chuang, REN Yong-feng, LI Hui-jing. Design of drawer type temperature acquisition module based on FPGA[J]. 2015, 34(12): 79-82. DOI： 10.13873/J.1000-9787(2015)12-0079-04.

摘要

针对多路温度采集的通用性与扩展性要求

设计了一种屉式温度采集模块

通过增减采集板卡的层数

可以方便地实现采集路数的修改。该模块以现场可编程门阵列（FPGA）为中心逻辑控制器

使用AD7621进行A/D转换

将采集到的模拟温度信号转换为数字信号传输到PXI机箱进行显示

以满足远程实时监测的需求。提出了一种使用查询ROM表的方式来进行模拟开关的通道切换

给软件设计带来极大方便;对于热电偶冷端温度不恒定造成的线性失真

使用K型热电偶专用的冷端补偿芯片AD8495

保证了测量的准确性。对温度采集模块进行测试

其采集精度达到±1%

证实了该设计的实用性与有效性。

Abstract

Aiming at versatility and scalability requirements of multi-channel temperature acquisition

design a drawer type temperature acquisition module

through increasing or decreasing layer numbers of acquisition board

changing of number of acquisition channels can be easily implemented. This module uses FPGA as center logic controller and AD7621 for analog to digital（ A / D） conversion

analog temperature signal is converted into digital signal and transmitted to PXI chassis for display

so as to meet needs of remote real-time monitoring. Put forward using a way of querying ROM table for channel switching of analog switch

which brings great convenience to software design; for linear distortion of thermocouple caused by cold junction temperature changes

using special chip AD8495 for K type thermocouple cold junction compensation chip

ensure accuracy of measurement. The temperature acquisition module is tested to find that its acquisition precision reaches ± 1 %

which proves the practicability and effectiveness of this design.

关键词

Keywords

references

一种通用可编程多通道采集方法的设计与实现 [J]. 李圣昆,罗振贵,单彦虎,任勇峰. 火力与指挥控制 . 2014(05)

薄膜热电偶温度传感器研究进展 [J]. 赵源深,杨丽红. 传感器与微系统 . 2012(02)

热电偶冷端补偿改进研究 [J]. 张海涛,罗珊,郭涛. 仪表技术与传感器 . 2011(07)

基于PT100的高精度温度采集系统设计与实验研究 [J]. 张修太,胡雪惠,翟亚芳,秦长海,张继军. 传感技术学报 . 2010(06)

电子仪器PCB设计中EMC技术的应用 [J]. 龚成龙,韩晓春,陈佳建. 电测与仪表 . 2005(05)

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