在热工测量和自动控制中,由于位式、时间比例式调节系统结构简单,价格便宜,操作维修方便,在各个领域得到了广泛的应用。然而调节过程的品质指标,尤其在一些设备工艺条件较为特殊和调节精度要求较为高的场合,不尽令人满意;加之电加热系统中往往采用继电开关器件作执行器,噪声大、故障多、影响着调节指标的提高。针对位式、时间比例式调节系统的特点和存在的缺陷,我们在原仪表调节回路之后增设 In the thermal measurement and automatic control, as the bit, time proportional adjustment system is simple, cheap, easy operation and maintenance, has been widely used in various fields. However, the quality of the adjustment process indicators, especially in some of the more specific conditions of the equipment and the regulatory requirements of the higher precision occasions, less than satisfactory; coupled with the electric heating system often used relay devices as actuators, noise, failure and more , Affecting the improvement of regulatory indicators. For the bit-type, time-proportional regulation system features and shortcomings, we added in the original meter adjustment loop