[信息与通信]具有超温报警功能的温控器的研制.doc

具有超温报警功能 温控器的研制 完 成 者： 指导教师： 完成时间： 摘 要 温度是一个和人们生活环境有着密切关系的物理量，也是一个人们在科学实验和生产活动中经常需要加以监测或控制的重要物理量。温度控制技术是一种比较重要的工业技术，不仅在化工、医疗、航空、航天等高科技领域，还应用在人们的日常生活中。 该课题设计是一个具有多项功能的温度监控电路，它可以监测温度并用数码显示。当温度超过一定值时，自动启动降温排风扇降温，如果温度继续升高到某一值时，它会发出报警声以提醒使用者采取进一步措施。此设计由温度——电压变换器、电压——频率变换器、频率计以及电风扇控制器和报警控制电路组成。 本设计最关键的部分是温度——电压变换器和电压——频率变换器。温度——电压变换器能将温度的变化转化为输出电压的变化。当温度升高时，输出电压随之升高，而且呈良好的线性关系。而电压——频率变换器可将输入的直流电压，转化为与之相应的脉冲频率，而且也具有良好的线性和精度。通过测量该脉冲频率，即可测出当时的温度。因此该仪器实际上是一台特殊用途的频率计，用测量频率的方法来测量温度。 关键字：温度，温度监控器，超温报警，频率变换器 Abstract Temperature is an and peoples living environment have near concern of physics quantity is also the important physics quantity that a persons usually needs to take in to monitor or controls in science the experiment with the production.The temperature control technique is a kind of more important industrial technique, not only at chemical engineering,medical treatment ,aviation ,aerospace etc. high-tech realm, also applied in peoples daily life. The topics design is a temperature supervision electric circuit that has several functions, it can monitor temperature to counteract a figures manifestation.When the temperature exceeds a certain value, the automatic start reduces the heat the row fan to reduce the heat, if the temperature continues to go up to some one value, it will send out to report to the police a voice to adopt by reminding an user further measure.This design is account by the temperature-electric voltage transformation machine,electric voltage-frequency transformation machine,frequency and the electric fan controller with report to the police the control electric circuit to constitute. This design the most decisive part is the temperature-electric voltage transformation machine and electric voltage-frequency transformation machine.The temperature-electric voltage transformation machine ability converts the variety of the temperature as variety of output the electric voltage.When the temperature go up, output electric voltage to go up immediately, and