你可以使用 UliEngineering Python 库,根据晶振频率精度轻松计算每年的时间偏差:
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TechOverflow calculators:
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button.
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button.
ppm
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crystal_deviation_seconds_per_year.py
from UliEngineering.Electronics.Crystal import crystal_deviation_seconds_per_year
# 计算 10 ppm 晶振的偏差
deviation = crystal_deviation_seconds_per_year("10ppm")
print(f"偏差(10ppm):{deviation:.0f} s/year")
# 计算 50 ppm 晶振的偏差
deviation = crystal_deviation_seconds_per_year("50ppm")
print(f"偏差(50ppm):{deviation:.0f} s/year")
# 计算 100 ppm 晶振的偏差
deviation = crystal_deviation_seconds_per_year("100ppm")
print(f"偏差(100ppm):{deviation:.0f} s/year")示例输出
crystal_deviation_seconds_per_year_output.txt
Deviation (10ppm): 315 s/year
Deviation (50ppm): 1577 s/year
Deviation (100ppm): 3154 s/year晶振每年偏差秒数的计算用于确定因晶振频率不准确而在一年内累积的时间误差。这在定时应用、时钟同步,以及了解晶振振荡器的长期精度方面至关重要。偏差与以百万分率(ppm)表示的频率精度成正比,并随时间线性增长。
偏差按以下公式计算:$\Delta t = \text{ppm} \times 10^{-6} \times T$,其中 $\Delta t$ 是时间偏差,$\text{ppm}$ 是以百万分率表示的频率精度,$T$ 是时间间隔(一年约为 3150 万秒)。例如,10 ppm 的晶振每年会偏差约 315 秒(5.25 分钟)。
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