# Vibration Compensation of the Frequency-Scanning-Interferometry-Based Absolute Ranging System  
[PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) [PERSON]  
1 State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; [EMAIL_ADDRESS] (F-M.Z. ); [EMAIL_ADDRESS] (H.P. ); [EMAIL_ADDRESS] (C-Z.S. ); [EMAIL_ADDRESS] (X-H.Q.) laser to the FSI-based absolute ranging system. Namely, the single-frequency laser was used to detect the change in optical path difference (OPD). A standard deviation of 3.15 \(\upmu\)m was obtained at a distance of 16 m. [PERSON] et al. [19] proposed to use the four-wave mixing (FWM) effect to provide the synchronous image scanning signal within the original laser scanning signal, which solved the synchronization problem in a dual-laser system. In 2017, [PERSON] et al. [20] combined the FSI-based absolute ranging technique with a time-varying Kalman filter to track the instantaneous motion of the target. The maximum deviation of 2.5 \(\upmu\)m was obtained. In most of the aforementioned studies, additional devices were needed which could make the synchronization of devices difficult and increase the system complexity. With the aim to reduce the system complexity and to improve the ranging accuracy in practical applications, we propose to use a triangular-wave frequency-modulated tunable laser and to process the beat signals of two adjacent scanning periods to obtain a signal that is immune to vibration.