Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12007250 | Variable synthetic wavelength absolute distance measuring device locked to dynamic sideband and method thereof | Liping Yan, Jiandong Xie | 2024-06-11 |
| 11255655 | Differential sinusoidal phase modulation laser interferometric nanometer displacement measuring apparatus and method | Liping Yan, Yingtian Lou, Jiandong Xie | 2022-02-22 |
| 11231268 | Sinusoidal frequency sweeping interferometric absolute distance measurement apparatus and method with dynamic offset frequency locking | Jiandong Xie, Liping Yan | 2022-01-25 |
| 11168975 | Phase delay extraction and compensation method in PGC phase demodulation technology | Jiandong Xie, Liping Yan | 2021-11-09 |
| 10641600 | Real-time normalization apparatus and method of phase generated carrier demodulation in sinusoidal phase modulation interferometer | Liping Yan, Shihua Zhang | 2020-05-05 |
| 10151573 | Dual-homodyne laser interferometric nanometer displacement measuring apparatus and method based on phase modulation | Liping Yan | 2018-12-11 |
| 10024647 | Method of air refractive index correction for absolute long distance measurement | Shihua Zhang, Liping Yan | 2018-07-17 |
| 9863753 | Laser heterodyne interferometric straightness measurement apparatus and method with six DOFs determination | Liping Yan, Enzheng Zhang, Bin Xu | 2018-01-09 |
| 9835441 | Absolute distance measurement apparatus and method using laser interferometric wavelength leverage | Liping Yan, Shihua Zhang | 2017-12-05 |
| 9797705 | Laser heterodyne interferometric signal processing method based on locking edge with high frequency digital signal | Enzheng Zhang, Liping Yan | 2017-10-24 |
| 8665452 | Method and apparatus for measuring the refractive index of air based on the laser synthetic wavelength interferometry | Liping Yan, Qiuhong Tian, Zhengrong Sun | 2014-03-04 |