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Stabilizing the measurement by filtering, Stabilizing the measurement by, Filtering -22 – KEYENCE LK-G Series User Manual

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3-22

3

LK-G-M-NO3-E

3 Function Settings

Stabilizing the Measurement by Filtering

The following three types of function can be set for the filter.

Averaging function

Performs moving-average of the measurement value within the range of 1 to 262144 times.

The following is the example of the process when an averaging value of four is set.

The sampling rate, measurement time for averaging, and refresh rate vary depending on the
settings.

Function No.

Filter name

Function

[-0

AvG

Average

Performs moving-average of the measurement value.
Sets the number of times of averaging.

[-1

LPF

Low-pass filter

Cuts extreme changes and only captures moderate
fluctuations. Set the cutoff frequency.

[-2

kPF

High-pass filter

Cuts moderate fluctuations and only captures extreme
changes.
Set the cutoff frequency.

Refer to "Response Delay Time" (6-17 page).

Refresh

rate

A

Refresh

rate

B

C

1

Sampling rate

Output data

1

4

2

3

4

5

6

7

2

5

3

6

Measurement time

for averaging

Measurement time

for averaging

Measurement time

for averaging

Internal data

Outputs data A by averaging data to .

Outputs data B by averaging data to .

Outputs data C by averaging data to .

Reference