中文摘要：

首次提出了在现有的恒流源混沌映射信号测量系统中，增加一次保序变换，将N位的自然排序混沌轨道符号序列起始段直接映射到N位的自然排序标准二进制序列，从而在混沌映射测量结果与传统线性A／D转换结果之间，建立直接的对应关系的方法。该方法可以有效地解决现有混沌映射信号测量技术中存在的一些问题。研究表明，混沌映射和保序变换，可以用于微弱信号的直接数字化测量，也可作为数字化传感器或传感器阵列的设计参考。

英文摘要：

This paper first issued a method to convert weak signals to digital ones based on the Chaotic mapping signal measurement system. The new method is based on an order preserving transformation to map N bits initial chaotic orbits symbolic sequence to N bits standard binary sequence in the constant current chaotic mapping model. Hence, the chaotic mapping signal measurement seems as the traditional digital signal measurement. It solved some basic problems in the former chaotic mapping signal measurement systems. This method may promote the research of chaotic mapping measurement and benefit the weak signal measurement,digital sensor or digital sensor arrays design.