An efficient heterodynefrequency method to measure the concentration of oil and water mixture is proposed.
提出了一种利用差拍法测量油水浓度的有效方法。
2
Frequency offset locking technology is widely applied in laser heterodyne detection and laser radar, which is of great value.
偏频锁定技术广泛应用于激光的外差探测、激光雷达等方面，具有重要应用价值。
3
Digital adaptive heterodyne filter adopts the heterodyne-modulation conception, which makes the filter work in low frequency and lessens the complexity of design.