用于模拟铂电阻温度传感器的可编程精密合成电阻.pdf

第7卷第2期
中船研究
Vol7 No. 2
2012年4月
of Shi
egean
ch
Apr.2012
di:10.3969/j.isn.1673-3185.2012.2.020
用于模拟铂电阻温度传感器的可编程精密合成电阻
宋琦1曹晨2孙建华1
武汉第二船舶设计研究所,湖北武汉430064
2中国舰船研究设计中心,湖北武汉430054
:在舰船动力装置控制系统中,温度测量设备通常采用铂电阻温度传感器对大量的温度信号进行采集,
并将温度信号转换成电阻信号。当这些温度测量设备进行调试、试验时,需要使用电阻器模拟铂电阻温度传感器
给出所需的电阻信号。介绍了新型的可编程精密合成电阻以替代传统的电阻箱,该合成电阻采用运算放大器和
D/A转换器等器件构成单口网络,通过编程控制输人电压和输入电流的比值获得期望的电阻值。详细分析了该
电路误差产生的原因,给出了以1CL7560和AD543为核心的具体实现电路,其输出电阻误差可控制在0.02
以内,对应温度信号在0.05℃以内。该合成电阻具有体积小、精度高、可编程数控的优点,是温度测量设备试验时
所需的重要设备。
关键词:精密合成电阻;可编程电阻;铂电阻温度传感器
中图分类号:U664.8
文献标志码:A
文章编号:1673-3185(2012)02-108-04
Programmable Precision Synthetic Resistance for the Simulation of
Platinum Resistance Temperature Sensor
Song Qi Can Chen Su
I Wuhan Second Ship Design and Research Institute, Wuhan 43004, China
2 China Ship Development and Design Center, Wuhan 43004, Chin
Abstract In ship power plant control system, platinum resistance temperature sensors are used to col
lect a large number of temperature signals and convert them into resistance signals. During debugging
and test of these devices, resistor is used to simulate platinum resistance terperature sensor to give the
required resistance signal, We introduced a new programmable precision synthetic resistance as substitute
for the traditional resistance box. The synthetic resis ane used operational amplifiers and D/A converter
to constitute one port network, controlled by programming the ratio of input voltage and input current, s
as to achieve the desired resistance value. This paper gives a detailed analysis of causes of error in the
circuit, and presents a specific circuit with ICL7560 and AD5543 as the core device, and maintains out
put resistance errors within 0.02 M and corresponding temperature signals below 0.05C. The s nthetic
resistanee has the advantages of small size, high precision and programmable feature, and that is the
important device required for the test of lemperature measurement sensor.
Key words precision synthetic resisance; programmable resistance; platinum resistance temperature
sensor
1引言
量大量的一、二回路系统和动力装置涉及的温度
信号,对需要远传的温度信号通常采用铂电阻温
在舰船动力装置控制系统中,对温虔、压力、度传感器进行测量并将温度信号转换为电阻信
流量等过程参数进行测量是重要的环节,需要测号。在温度信号测量控制设备的调试、试验过程
收稿日期:2011-10-3l
作者简介:宋琦(1979-),女,硕士,工程师。研究方向:船舶动力装置控制系统。E-mail.bi000163.com
最信作者;宋琦。
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