- Details
Experiments
1. Observing the standing wave
2. Research on the function relationship between chord length, tension, linear density and driving frequency.
Features
1. Different linear density kinds of steel chords are provided, such us Φ0.4mm, Φ0.3mm, Φ0.5mm, all for 2 pieces.
2. Dedicated signal source has a low output impedance. It can use low impedance driving sensor to generate excitation signals. At the same time, the degree of regulation and resolution of frequency is small enough so that it can easily find the resonant frequency.
SEK-8103-01 String Vibration Experiment with Independent Signal Generator
Signal Source
Signal: sinusoid, degree of distortion ≤1%
Range of frequency: 15-100Hz or 100-800Hz
Frequency views: adopting equal precision frequency measurement, displayed by four-digital number
Range: 0-999.9Hz
Resolution: 0.1Hz
Accuracy: ± (0.2% + 0.2Hz)
Output: amplitude 0-5Vp-p, current ≥0.5A, waveform amplitude≥20mV
Mechanics
Maximum of effective length: 80cm
Chord tension: 4.90-49.0N, divided in 10 levels
SEK-8103-02 String Vibration Experiment with Integrated Signal Generator
Signal Source
AC output: 220V±10%, 50Hz
Maximum of driving voltage: VP-P=25V, provided by instrument
Frequency range: f=0～200Hz (continuously adjustment)
Frequency step: 0.01Hz (Min), 1Hz (Max)
Mechanics
Platform: aluminum alloy
Demision: 1200 x 80 x 40mm ( LxWxH )
Weight: ≈5kg
Experimens and data
1. Verify the relationship between the wavelength of shear waves and tension of chords.
log λ ~ log T slope is K = 0.4984, coefficient of association: r = 0.9988
2. Verify the relation between the wavelength of shear waves and vibrational frequency of wave source
m = 150.00 x 10-3kg, glocal=9.793m/s2 , T = 150.00 x 10-3 x 9.793 = 1.469N.
The result is show below:
log λ ~ log T slope is K =0.9847, coefficient of association: r = 0.9979
3. Verify the relation between the wavelength of shear waves and density of chord
The real experiment. Experimental condition: position of mounting plate: 10, 70cm, length of chord 60cm