Measurement of Time Delay Caused by Mixer And Lowpass Filter in Heterodyne Interferometer |
|---|
| Ming Yang, Chenguang Cai, Ying Wang, Zhihua Liu, Haijiang Zhu |
- Abstract:
- Phase response is a key performance parameter of vibration transducers, which is usually measured by the primary calibration. The typical primary calibration method used analog mixer and lowpass filter to modulate heterodyne laser interferometer signal. There is some time delay caused by the analog devices, which will introduce some phase delay for the measurement of phase response of transducers. This paper proposed a novel time delay measurement method of the analog devices based on high definition oscilloscope (HDO) and phase unwrapping sine approximation method (PUSAM).
- Keywords:
- phase response, primary calibration, phase delay, oscilloscope, sine approximation method
- Download:
- IMEKO-TC22-2017-012.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC22
- Event name:
- TC22 Conference 2017 - Measurement facing new challenges!
- Title:
4th Conference on Vibration Measurement (together with 23rd TC3 Conference on the Measurement of Force, Mass and Torque and 13th TC5 Conference on the Measurement of Hardness)
- Place:
- Helsinki, FINLAND
- Time:
- 30 May 2017 - 01 June 2017