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PS081 bảng dữ liệu(PDF) 35 Page - ams AG

tên linh kiện PS081
Giải thích chi tiết về linh kiện  Single Chip Solution for Strain Gauges
PDF  155 Pages
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nhà sản xuất  AMSCO [ams AG]
Trang chủ  http://www.ams.com
Logo AMSCO - ams AG

PS081 bảng dữ liệu(HTML) 35 Page - ams AG

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acam-messelectronic gmbh - Friedrich-List-Str.4 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
3-12
1
PSØ81
3.4.4
Averaging (avrate)
The number of strain gages respectively half bridges connected defines how many discharging cycles
are needed to make one complete ratio measurement:
Half bridge
à
2 cycles
Full bridge
à
4 cycles
Quattro bridge
à
8 cycles
Figure 3.14 Discharge cycles for a complete measurement
Those numbers of cycles for each mode together define 1 sample (avrate=1). This is also the mini-
mum needed for one complete ratio measurement.
3.4.5
Better resolution by averaging
In PS081, the resolution can be increased by internal averaging. The sample size of the averaging
is specified by parameter avrate in register 2. The standard deviation of the result will be improved
by nearly the square root of the sample size. The following picture shows the correlation for a full
bridge:
Figure 3.15 Averaging
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