Do you understand what precision is? Precision refers to the decimal point, the decimal point, yes, the decimal point
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Do you understand what precision is? The precision is the decimal point! If I am 1 and you are (1+1), then based on my value, your accuracy is 100%. If I am 1.0 and you are 1.1, then based on my value, your accuracy is 10%. If I am 1.00 and you are 1.01, then based on my value, your accuracy is 1%. If I am 1.000 and you are 1.001, then based on my value, your accuracy is 0.1%. If I am 1.0000 and you are 1.0001, then based on my value, your accuracy is 0.01%. If I am 1.00000 and you are 1.00001, then based on my value, your accuracy is 0.001%. Is it clear now? Do you understand now?
These days, there are quite aggressive people in the watch-selling business; for example, a watch whose maximum allowable tolerance is 0.1 will have the seller set two decimal places, claiming that the precision is 0.01, and if three decimal places are used, the claimed precision becomes 0.001.......
In fact, it depends on the precision of the sensor and whether the digital part can respond accordingly.
This post was last edited by 1111111 on 2016-12-24 at 13:14. Yes, to avoid being deceived or tricked, one must first clearly understand the concepts of accuracy and resolution. Accuracy refers to the degree to which an instrument’s measurements are precise; traditionally, it is referred to as precision. Resolution, on the other hand, refers to the smallest value that an instrument can reliably detect. Put simply, it’s related to the scale markings! Resolution is not only the limit to which the precision of an instrument can reach; it is also an important indicator of a electronic instrument’s ability to resist electromagnetic interference. Moreover, it serves as a crucial basis for determining the trends in control systems! . . . Some people who work in measurement believe that high-resolution digital instruments, which display values with 5, 6, or 7 digits, are of no use and serve only to deceive people – this view is caused by an overemphasis on accuracy. In industrial measurement, the precision of certain technical parameters depends not so much on the accuracy of the instrument, but rather on its resolution! Such as the volatility indicators for temperature and pressure control, or the leakage volume indicators for airtightness testing. . . In some applications, the resolution of the instrument also determines the efficiency of production. Finally, let me brag a bit: at the beginning of this month I sold several pressure sensors with a range of 2 bar and a resolution of 0.00001 bar, which is five parts in a million. These sensors are said to be used for testing aircraft engines; the buyer was a foreigner. The sample fee I received was in Swiss francs, hehehe.
That’s what is meant by 1000-carat gold and 10,000-carat gold, right?
This post was last edited by 1111111 on 2016-12-25 at 13:37. In terms of measurement, if a value is said to be 1, it means that its actual value lies between 0.5 and 1.4; it’s impossible to determine exactly which one it is! If a measurement value is said to be 1.0, that means its actual value lies between 0.95 and 1.04; it’s impossible to determine exactly what it is. If a measurement value is said to be 1.00, then its actual value is between 0.995 and 1.004; again, it’s impossible to know exactly what it is. In other words, in terms of precision, these three methods of measurement aren’t all the same. That is, a value of 1 in terms of measurement isn’t equal to 1.0, nor is it equal to 1.00. This is why the mathematics you learned in the past needs to evolve; otherwise, one ends up acting like a fool. Hehe, do you understand? :lol
Learned it, simple and easy to understand: lol
I understand this; it’s the precision notation right after yours that confuses me a bit and makes it hard for me to grasp.