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在工业生产中,计数是一种常用的检测项目,例如产品的数量、时间的长短、转速的快慢等都可以用计数器来测定.一般来说,这些量是比较容易测的,因为它们均具有明显的“个数”概念,只要将个数变成脉冲,然后对脉冲进行计数就行了.然而,在实际工作中,还有一类“模拟量”,它不具有明显的个数概念,如长度、重量等,这就需要使用传感器将长度和重量变成脉冲,再经系数变换,将若干个脉冲变成计量单位脉冲进行计数.在日常工作中,还有一些计量要进行单位换算,如1磅等于0.45公斤等,也涉及到如何进行系数变换和计数的问题.以上统称比例式计数器.显然,为了使这种仪器具有通用性,比例系数应该可以人工设
In industrial production, counting is a commonly used test items, such as the number of products, the length of time, speed, speed, etc. can be used to measure the counter. In general, these quantities are relatively easy to measure, because they have The notion of “number” is obvious, as long as the number is changed to a pulse, and then the pulse is counted.However, in practice, there is a class of “analog” that does not have a significant number of concepts such as length , Weight, etc., which requires the use of sensors will be the length and weight into a pulse, and then by the coefficient conversion, a number of pulses into a unit of measurement pulse count in daily work, there are some measurements to be unit conversion, such as 1 Pound is equal to 0.45 kilograms, also involves how to carry on the coefficient transformation and the counting question.Above all said the proportion type counter.Obviously, in order to make this kind of instrument have the versatility, the proportional coefficient should be able to be artificial