Difference Between Sensor Accuracy And Resolution

Accuracy and resolution are important indicators for customers to choose precision optical ranging sensors. Different occasions have different requirements for these two indicators. For digital temperature sensors, the general accuracy refers to the difference between the data read back by the sensor and the absolute temperature, and the resolution refers to the smallest temperature change that the sensor can perceive. For analog temperature sensors, I'm not sure. In the impression, the difference between the two is not too large, mainly because customers often confuse the concepts of absolute accuracy and display accuracy when they use it. Many times, customers say that accuracy refers to display accuracy rather than absolute accuracy. The display accuracy should be equivalent to the resolution.

Resolution is usually understood as the accuracy of A / D conversion or the smallest change that can be perceived. Precision usually refers to:

A / D, other factors of the sensor circuit, and other comprehensive factors, the error is divided by the percentage obtained.

Resolution is the sensitivity of the sensor, that is, the minimum amount of input that causes the output to change. Digital instruments are usually determined by the number of digits of the A / D converter. The accuracy is the maximum percentage error of the sensor repeatedly measuring the same standard value. The index resolution is several times better than the accuracy.

Resolution, "usually determined by the number of bits of the A / D converter", or look at the last bit of its output value.

A plastic ruler has a minimum scale of 1mm. When you measure it, you can't read numbers below 1mm. Then this 1mm is its (minimum) resolution, which is the smallest distinguishable measure. If you already know the actual length of an object is 100mm, take this ruler to measure, the measured data is 102mm, then the accuracy of this ruler is (102-100) /100=0.02, that is, between the measurement result and the real value The error.

Accuracy-refers to the ratio of the value of the positive and negative three standard deviations to the range around the true value, and the maximum difference between the measured value and the true value.

Resolution——is the smallest measured value that causes the displayed value to change; it should be separated from the sensitivity coefficient (sensitivity coefficient --- refers to the ratio of output to input)

JRT laser ranging module has extraordinary characteristics in measurement accuracy and resolution.