Electrodynamic vibrator is a kind of electric/machine transformer, the electrical energy into mechanical energy, to provide the excitation of a device for specimen. It with broadband power amplifier and other related instruments, can be widely used in all kinds of engineering structures such as rockets and missiles, aircraft, ship, automobile, mining machinery, machine tools, train, building construction, etc., especially suitable for the pile foundation, Bridges, DAMS and other structural vibration test.
Second, the technical indicators
HN HN - 1-2-1-1-5 HN HN - 1-1-10-20 HN HN - 1-1-40-50 HN HN - 1-1-80
Maximum exciting force (N) 10 20 to 50, 100, 200, 400, 500, 800
Force constant p 5 or greater 8 8 or 10 or more 14 11 or higher acuity or 17 or 27
Force constant calibration error < 1% < < < < < < 1% 1% 1% 1% 1% 1% < 1%
The maximum amplitude of plus or minus 3 + 3 + 5 + 5 + 5 + 5 + / - 12.5 7.5 mm
Maximum current (A) 2 2 7 10 14 32 30 30
Frequency range (Hz) 8 ~ 10 k 8 ~ 10 k ~ 5 k 8 ~ 4 k, 8 ~ 4 k 8 ~ 4 k, 8 ~ 4 k ~ 1.5 k
Moving coil dc resistance (Ω) 2, 1.6 1.6 0.9 0.5 0.25 0.6 0.5
Maximum exciting force to
Current nonlinear < < < < < < 1% 1% 1% 1% 1% 1% 1% < < 1%
The total weight (1.5 kg) 3 8 10 16 36 and 40 and 55
In addition, it can be used as a vibration table, for small instrument, parts such as environment test, natural frequency and vibration fatigue test as well as to calibrate the sensors.
