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在双读数(或多读数)数学测量系统中,都有粗精两个通道(在多读数系统中有多个通道)。粗精两通道的正确耦合,是一个至关重要的问题,如果发生耦合错误,会造成粗大误差,这是不能允许的。正确耦合要靠粗精耦合逻辑电路来保证(此逻辑有专门论述,不在本文讨论范围)。但是,在实际系统中,由于元部件、线路等的误差及干扰、噪声等影响,仍有可能超差,造成耦合错误。解决这一问题的根本途径,当然是需要提高元部件及线路的精度,改进粗精耦合逻辑电路,提高粗精耦合的可靠性,但另一方面,采取有效措施,对粗精耦合情况加以监测,以确保正确耦合,是完全必要的。这在调试机器及系统考核中就尤为重要。此问题在双(多)读数测量系统中是有普遍意义的。
In dual reading (or multiple reading) math measurement systems, there are two fine channels (multiple channels in a multiple reading system). The correct coupling between rough two channels is a crucial issue that can not be tolerated if there is a coupling error that results in gross errors. The correct coupling depends on coarse coupling logic to ensure (this logic is specifically discussed, not in the scope of this article). However, in the actual system, due to the error of components, lines, etc., interference, noise and other effects, it is still possible to exceed the tolerance, resulting in coupling errors. Of course, the fundamental solution to this problem is to improve the precision of components and circuits, improve the coarse-fine coupling logic circuit, and improve the reliability of rough fine coupling. On the other hand, effective measures should be taken to monitor rough fine coupling , To ensure the correct coupling is absolutely necessary. This is particularly important in debugging machines and systems. This problem is of general significance in dual (multi) reading measurement systems.