| 摘要 |
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement equipment and can be used for measuring characteristics of harmonic signals of pulsed signals and mechanical vibrations of acoustic frequencies. Digital frequency meter includes: a high frequency amplifier (UHF), audio frequency amplifier (AFA), reference time pulse generator, ADC, generator of high-frequency pulses (AIT), unit for selecting the period of positive pulse shaper (DRF), negative pulses generator (FEI), valve, initial setting unit, pulse counter (SI), decoder, an information display unit (IDU). Inputs of digital frequency meter are inputs of UHF and AFA, outputs of which through first and second closed contacts respectively first switch are connected in series to input of ADC. ADC output is connected to second inputs of the period, DRF, FEI and through first closed contact of second switch to first input of valve. Output of valve is connected to first input. Output of SI is connected to input of decoder. Output of decoder is connected to input of IDU. Reference time pulse generator output is connected through first closed contact of third switch to second input of valve, with first initial setting unit input and to first input of extraction period unit. First output of AIT through second closed contact of second switch is connected to first input of valve, second output AIT connected to second input of initial setting unit. Initial setting unit output is connected to SI second input. Output of recovery period extraction unit is connected to first inputs of DRF and FEI, and through first closed contact of fourth switch and the second closed contact of third switch to second input of valve. Output DRF through second closed contacts of fourth and third switches is connected to second input of valve. Output of FEI via third closed contact of the fourth switch and through second closed contact of third switch is connected to second input of valve.EFFECT: technical result consists in expansion of functionality by implementing functions of measuring parameters of mechanical oscillations of audio frequency.1 cl, 1 dwg |
