在常见的数字电压表中就有逐次逼近平衡式电路,有的文献曾建议用类似的电路实现多种海洋参数测量的数字化。由于其结构较复杂,不易利用通用的集成单元,所以不易推广。本文提出的渐近平衡法优点是结构简单,较易利用通用的单元,缺点是动作速度较低。但是对那些並不要求快速收集数据的场合,却是有价值的。 In the common digital voltmeter has successive approximation of the balance circuit, some literature has suggested using a similar circuit to digitize a variety of measurements of the sea. Because of its complex structure, not easy to use common integrated unit, it is not easy to promote. Asymptotic balance method proposed in this paper has the advantages of simple structure, easy to use common unit, the disadvantage is the lower speed. But for those who do not require quick data collection, they are valuable.