| 摘要 |
FIELD: measurement technology; measuring parameters of piezoelectric transducers. ^ SUBSTANCE: proposed device designed for determining parameters of pressure gradient probes of low sensitivity threshold in any medium including water is characterized in low noise level and easy implementation in computer systems and has stiff tube whose first butt-end mounts first radiator electrically connected to signal generator. Tube accommodates pressure gradient probe to be tested and first pressure susceptor electrically connected, respectively, to first and second inputs of switching unit whose output is connected to input of recording equipment. Stiff tube is enclosed and its second butt-end carries second radiator identical to first one and connected to signal generator through phase shifter. Pressure gradient probe under test is installed in central part of tube and has metal bushing with bimorph bender installed in its sectional area wherein it is tightly joined over its profile to its inner surface. Metal bushing is, essentially, wall of stiff-tube central part; newly introduced in device is second pressure susceptor identical to first one installed coaxially and symmetrically to the latter either side of pressure gradient probe under test and electrically connected to third input of switching unit. ^ EFFECT: simplified design, extended operating frequency range toward low values without increasing size of device. ^ 2 cl, 3 dwg |
