| 摘要 |
Device for measurement of velocity of ultrasound relates to area of measuring engineering and can be used for measurement of velocity of ultrasound through multiplication of frequency of generator of synchronizing pulses by 2&pgr;n and measurement of phase between signal of generator of synchronization pulses and negative half-wave of bottom signal. Device has generator of synchronization pulses, circuit I, generator of sounding pulses, electronic key, control circuit, receiving-transmitting transformer loaded to measuring sample, amplifier, circuit for frequency multiplication by 2&pgr;n, circuit I, selector, counter, trigger, circuit of single start, pulse former. |
