Analysis of frequency-change sampling strategy for impact acceleration storage measurement

Chen Chang-xin; Jin Hong; Ma Tie-hua

doi:10.11883/1001-1455(2015)04-0501-06

Volume 35 Issue 4

Jun. 2016

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Chen Chang-xin, Jin Hong, Ma Tie-hua. Analysis of frequency-change sampling strategy for impact acceleration storage measurement[J]. Explosion And Shock Waves, 2015, 35(4): 501-506. doi: 10.11883/1001-1455(2015)04-0501-06

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Analysis of frequency-change sampling strategy for impact acceleration storage measurement

doi: 10.11883/1001-1455(2015)04-0501-06

Chen Chang-xin^{1, 2
,},
Jin Hong^{3, 4
,
,},
Ma Tie-hua^{1, 2, 4}

1.
National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, Shanxi, China
2.
Key Laboratory of Instrumentation Science & Dynamic Measurement ofMinistry of Education, North University of China, Taiyuan 030051, Shanxi, China
3.
School of Mechanical and Electrical Engineering, Soochow University, Suzhou 215021, Jiangsu, China
4.
School of Computer and Control Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2013-12-06
Rev Recd Date: 2014-04-08
Publish Date: 2015-07-25

Abstract

Abstract

The fixed sampling frequency is not reasonable for obtaining the signal parameters with variable changing speed during the measurement process of high-g acceleration. A digital frequency-change sampling method was put forward in this paper to reduce data redundancy and ensure signal without distortion as well based on the method of changing ADC Sampling-frequency. Two pieces of memory were used to fulfill this target. Sufficient data source got by high-speed sampling frequency was written to the first memory at the same frequency, and the address of the second memory was changed with frequency propulsion according to the characteristic of signal variation, then the data stored in the first memory was extracted thus the frequency-change sampling got realized. Frequency measurement system could bear high impact by Hopkinson bar. Simulation and experiment confirmed that the frequency-change sampling method proposed in the paper can effectively solve the contradiction between the sampling frequency and data capacity.
- mechanics of explosion,
- dynamic measurement,
- frequency-change sampling,
- sampling strategy,
- acceleration

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References(11)

References

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