CAJ | 학술논문

基于Multisim 仿真软件，利用555定时器设计了湿度检测电路，用于电子技术实践教学。系统设计：1）利用HM1500湿度传感器采集湿度信息，转换为电压信号；2）利用555定时器设计压频转换电路，间接实现模/数转换；3）利用74LS161、74LS273等设计计数器测量锁存湿度值；4）利用数码管显示湿度值。 Multisim软件仿真结果显示，本文设计电路准确稳定，转换精度高，线性度高，且成本低。该系统设计融合了模拟电子技术及数字电子技术课程基本教学内容，可作为实践项目用于教学。
기우Multisim 방진연건，이용555정시기설계료습도검측전로，용우전자기술실천교학。계통설계：1）이용HM1500습도전감기채집습도신식，전환위전압신호；2）이용555정시기설계압빈전환전로，간접실현모/수전환；3）이용74LS161、74LS273등설계계수기측량쇄존습도치；4）이용수마관현시습도치。 Multisim연건방진결과현시，본문설계전로준학은정，전환정도고，선성도고，차성본저。해계통설계융합료모의전자기술급수자전자기술과정기본교학내용，가작위실천항목용우교학。
A humidity detection circuit has been designed for electronic technology practice teaching based on Multisim software. The design is as follow:1) convert humidity value to voltage value by using sensor HM1500;2) convert analog signal to digital signal indirectly by adopting voltage-frequency-conversion circuit based on 555 timer;3) measure and save humidity value by designing a counter based on 74LS161 and 74LS273;4) display humidity value by adopting digital number display. Simulation results based on multisim soft show that the circuit designed is of its correctness , stability, high precision of transformation , high linearity and low cost. The proposed design, which employs the basic teaching knowledge of analog and digital electronic technology, is suitable as a practice teaching project.