汽车空调温度传感器位置及控制参数优化研究

近年来我国汽车制造领域发展迅速,汽车空调也开始成为各类汽车的标配,如何提高汽车空调的性能优势开始成为业界关注的焦点,基于此,本文简单分析了汽车空调温度传感器位置选择,并详细论述了汽车空调温度传感器的控制参数优化,希望由此能够为相关业内人士带来一定启发。

利用PLC进行PID退火炉温度控制

本文阐述了应用PID指令来实现PLC的退火炉PID温度控制,利用DVP-PLC内置PID模块,自动调整其参数,实现PID自动控制。

严寒地区农村太阳能与空气源热泵供热系统优化研究

利用TRNSYS软件,通过对长春地区某典型农村住宅太阳能与空气源热泵供热系统进行模拟,分析了该供热系统对长春农村住宅的适用性,重点探究了空气源热泵启停温度控制参数、供水温度和运行策略对系统性能及运行费用的影响。结果表明,太阳能与空气源热泵供热系统能够满足长春地区该典型农村住宅冬季供暖的要求,室内温度保持在18~24℃,舒适度较好;空气源热泵启停温度控制参数每降低1℃,供暖季系统能耗降低2%~3%;供水温度每降低1℃,系统能耗降低0.8%~0.9%;最低运行费用策略优于最大利用太阳能的运行策略。采用最低运行费用策略的供热系统能耗可降低3%~4%,运行费用可减少7%~8%。

钢结构焊接通用工艺

在建筑钢结构行业里，编制并贯彻焊接工艺规程，是一项重要的指导性的工作。本文根据实践经验，把此项工作的通用性课题一一罗列，并就其解决对策加以论述。这些做法对同行业界具有参考价值。

Stability Analysis of Distributed Parameter Systems on Temperature Measurement of Large-scale Objects

In this paper, the mechanical construction, thermal regulator design and temperature measurement system of a local area were set up for large-scale linear measurement. Numerical analysis based on temperature correlated characteristic is discussed to obtain optimal observation points for the measurements. The horizontal temperature distribution of the measured area is compared with the measurement of the variation of temperature at 15℃ and 20℃ over time, and characteristic of dynamic response is also discussed. In addition, the long-time stability of measured temperature is analyzed by means of using the standard deviation. It characterizes the temperature distribution performance of a large area and how it may impact the measurement of a large-scale object.