especially the biological cultivation laboratory , the application of the thermostated
container is more general.
In this design, we, to a thermostatical system of training the case and designing,
in the system , see off and pass to the one-chip computer through detection and
change of the temperature of the thermostated container , go on , compare with setting
value, one-chip computer go on, punish to data, export and urge PWM to export
according to deviation magnitude of signal, through change cycle and amplitude that
PWM output , control , generate heat power of , achieve purpose of temperature
control in the thermostated container. The one-chip computer originally designed is
51 series, gather , compare , deal with and export the data, PWM export through pulse
of one-chip computer, isolate, input, enlarge circuit to generate heat through
photoelectricity the silk is heated, promote case temperature directly, achieve the goal
of controlling temperature finally. In the course of controlling , there is lagging that
some factors result in controlling , correct through digital PID controller .
Keywords: PWM One-chip Computer Digital PID Controls
设计题目:电热恒温箱的单片机微机控制系统
设计内容:
本系统为电热恒温培养箱而设计,培养箱加热功率为 200—700W,
电源为交流 220V,温度调节范围为+3--+60
o
C,升温速度为 0.5
o
C/min。
设计要求:
本控制系统实际达到的性能指标为: