Скорость звука инструмента

I. General description: This series includes products SV-DH-7A/SVX-7, SV-DH-7/SVX-7, SV-DH-7A/SVX-5, SV-DH-7/SVX-5, SV-DH-3A/SVX-5 and SV-DH-3/SVX-5 and different combinations serve different applications. The product is used for measuring sound velocity and for understanding generation of ultrasonic vibration and ultrasonic emission, transmission and reception. The experiments will be advantageous to understanding the function of piezoelectric ceramic of sensor and theoretical knowledge on resonance, vibration synthesis, and wave interference. It shall be additionally fixed with oscilloscope. This series of products is granted with patent right (patent No.: 02301711.2) II. Distinction and features: (1)SV-DH-7/ SV-DH-7Ameter It may use standing wave method, phase method and time difference method to measure sound velocity in air and liquid medium. Interval between transducers 0∼350 mm Distance reading mode: SV-DH-7A: Reading with both digital rule and drum, SV-DH-7: Reading with micrometer type drum (3)SV-DH-3/ SV-DH-3Ameter It may use standing wave method, phase method and time difference method to measure sound velocity in air. Interval between transducers 0∼280 mm Distance reading mode: SV-DH-3A: Reading with both digital rule and drum, SV-DH-3: Reading with micrometer type drum (3) Model SVX-7signal source: Frequency range: 50Hz 50kHz in 3 adjustable steps (4) Model SVX-5signal source: Frequency range: 25kHz 50kHz, infinitely adjustable III. Technical parameters and performances: 1. Harmonic frequency of piezoelectric transducers: 37kHz ±3kHz, maximum emission power: 10W 2. Interval between transducers: 0∼350 mm 3. Measurement precision of sound velocity precision: Better than 3% 4. Pulse modulation signal source: signal frequency: 37.5kHz, pulse duration: 0.07ms, pulse period: 30ms 5. Range of chronometric timer: 1µs∼1s, resolution: 1µs