초록 ▼

A method of testing frequency characteristics of a laser displacement/vibration meter by the use of a novel method which can cope with a broader frequency range and finer micro-level displacements to enhance the reliability of the displacement/vibration meter. Upon applying impact on one end face of

A method of testing frequency characteristics of a laser displacement/vibration meter by the use of a novel method which can cope with a broader frequency range and finer micro-level displacements to enhance the reliability of the displacement/vibration meter. Upon applying impact on one end face of a round metal rod, an elastic wave pulse which propagates through the metal rod generates a stepwise dynamic displacement of the other end face of the rod when reflected there. This dynamic displacement is measured simultaneously by a reference laser interferometer with a reference laser beam and a laser displacement/vibration meter with unknown frequency response characteristics, followed by comparison of measurement data over a frequency range to determine the frequency response characteristics of the unknown laser displacement/vibration meter.

대표청구항 ▼

[ What is claimed is:] [1.] A method for testing frequency response characteristics of one of a laser displacement meter or a laser vibration meter, comprising the steps of:applying impact on one end face of a round metal rod to produce an elastic wave pulse propagating toward the other end of said

[ What is claimed is:] [1.] A method for testing frequency response characteristics of one of a laser displacement meter or a laser vibration meter, comprising the steps of:applying impact on one end face of a round metal rod to produce an elastic wave pulse propagating toward the other end of said metal rod to generate stepwise dynamic displacement thereat by reflection of said elastic wave pulses;measuring the stepwise dynamic displacement of the other end face of said metal rod simultaneously by a reference laser interferometer with a reference laser beam and said one of the laser displacement meter or the vibration meter with unknown frequency characteristics; anddetermining frequency response characteristics of said one of the laser displacement or the vibration meter by comparison of measurement data with counterpart data of said reference laser interferometer over a frequency range.