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提高大型机电设备的加工水平，动态在线测量是关键。将线性调频半导体激光器应用于动态测量，对目标的位置及移动的速度、加速度等实现准实时测量，可对加工过程实现动态补偿；依靠系统的自校准，消除半导体激光器的老化对激光波长的影响，使得测量精度得以保证，进而使其实用化成为可能；待测的参数是拍频的频率，即测量精度与半导体激光器的输出光功率无关，加之频率是数字量，便于和微机相连组成自动测控系统。系统静态相对测量精度为３×１０－４。整个测量系统体积小、结构简单，便于实现生产和现场安装，可广泛应用于大型机电设备的静态、动态测量。
Improve the level of large-scale mechanical and electrical equipment processing, dynamic online measurement is the key. The LFM laser is applied to the dynamic measurement to realize the quasi-real-time measurement of the target position, the moving velocity and the acceleration and so on, which can dynamically compensate the machining process. The self-calibration of the system eliminates the influence of the aging of the laser diode on the laser wavelength , So that the measurement accuracy can be guaranteed, and thus make it possible to practical; parameters to be tested is the beat frequency, that is, the measurement accuracy of the semiconductor laser output power has nothing to do, combined with the frequency of digital, easy to connect with the computer to form automatic measurement and control system. System relative static measurement accuracy of 3 × 10-4. The whole measurement system is small in size, simple in structure, easy to realize production and on-site installation, and can be widely used in static and dynamic measurement of large-scale electromechanical equipment.