论文部分内容阅读
当前,由于微机在温度控制方面的广泛应用,形成了各种专业性质的微机温控仪;存在的典型问题是:(1)控制仪的小型化和降低造价;(2)提高控温精度和稳定性。简言之,即性能价格比问题。在国内,前一问题,目前已把最小控制系统集成到115~(mm)×220~(mm)的电路板上,价格已控制在2000元左右;后一问题,其分辨率、控温精度已达到1℃、0.1℃、O.01℃和0.001℃;而温度波动率可达到±0.0004℃/15分钟。一、最小温度控制系统在温度控制和检测领域内,多级控制系
At present, due to the wide application of microcomputer in temperature control, a variety of professional-type microcomputer temperature controller has been formed. The typical problems are: (1) miniaturization of controller and cost reduction; (2) stability. In short, the performance-to-price ratio problem. In China, the previous question, the minimum control system has been integrated into the circuit board 115 ~ (mm) × 220 ~ (mm), the price has been controlled at about 2,000 yuan; the latter problem, the resolution, temperature control accuracy Has reached 1 ° C, 0.1 ° C, 0.01 ° C and 0.001 ° C; and temperature fluctuations can reach ± 0.0004 ° C / 15 minutes. First, the minimum temperature control system In the field of temperature control and testing, multi-level control system