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多点温度监控系统的设计谁知道？_其他_设计456问答
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多点温度监控系统的设计谁知道？

浏览：44次 | 提问时间： 07-30 09:47
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3个答案
叫醒我 07-30 09:48

系统采用了一台上位机和多个下位机的集总式结构。上位机采用AT89S51单片机，下位机采用AT89C2051单片机。上位机与下位机之间采用RS  485总线通信。其中上位机系统配置液晶显示屏、按键。按键用于调整各个点的预置温度和系统时间，查询各个点的预置温度值、实际温度值以及调温设备运行情况，输入下位机的控制*。液晶显示屏用于显示系统时间，以及各点的预置温度值、实际温度值和调温设备运行情况，如1  min内没有任何*作，则液晶显示屏上开始循环显示各个点的实际温度值、预置温度值以及调温设备运转情况，每一个点的*在液晶屏上显示的时间是8  s。下位机负责温度采集和控制调温设备运转，温度传感器采用DSl8820。上位机首先将预置温度值发送到下位机，下位机将实际温度与预置温度进行比较后输出调温设备控制信号，并将实际温度与调温设备运转状态发送到上位机。

流年曲終人散ノ安靜就好 07-30 09:56

方案  利用单片机串口通信组成测控网络，各从机与主机进行通信交换    *，主机将采集到的温度统一实时显示，管理者可根据实时温度发出控制命令，由主机向从机通过串口通信网络传达决策，再由各从机对温度实施控制。    具体设计分以下几个方面实施：    (1)本系统最核心就是实现主机与从机间的通信，通信使用串口实现主机“一对多的控制”。  (2)本机要实现*作者对其的控制就必须建立良好的人机交互界面，故本机将采用12864液晶实施*显示，采用键盘读入控制*，确保本机具有良好的人机交互界面。    (3)温度的采集使用DS18B20，优点：单总线，降低系统成本，输出是数字量，易于单片机接口。  (4)由于本系统要实现多机通信，应尽量使用同型号单片机，考虑成本采用AT89S52单片机  (5)其他事项我们将在实施中改动，努力使系统具有较高的实用性，丰富的功能和低廉的成本。

梦呓说爱你 07-30 10:04

设计说明：在对温度要求较高的地方（比如粮库）需要对测试仓库的各个地方的温度进行监控，超过存储温度则需要报*，提醒管理人员打开换气设备。本课题是模拟粮库的实际情况，为之设计一个监控系统。  设计要求：基本部分1、主机可监控不少于3个点的温度变化，*流显示各点温度；2、温度测量精度±2℃；3、显示器分两段，第一段1位十进制数，显示测温点号；第二段2位十进制数，显示对应点的测量温度；4、所连接的测温点中只要有任何一个测量点的温度达到高温值时应给出报*信号，当所有点的温度值降低到安全值后，停止报*。发挥部分1、温度传感器可在热敏电阻或集成温度传感器之间选择一种。无论选择哪一种，都不采用A/D转换器进行信号变换2、温度测量精度±1℃。3、具有温度传感器失效判断与显示功能。4、其他功能，尽量考虑降低成本。特别说明：不能用单片机，不能用A/D转换器进行信号变换

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