Sound pressure sensitivity testing device for medical hydrophone

• Main Authors: DAI WEIDONG, DAI WEIZE, WANG YAJU, LIU SHUNNAN, MAO DEXU
• Format: Patent
• Language: English
• Published: 29.04.2015
• Subjects: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

The invention discloses a sound pressure sensitivity testing device for a medical hydrophone. The sound pressure sensitivity testing device comprises a lower base, a liquid column cylinder, a vibration table, an upper sealing cover, an upper base and a hollow diameter-variable support, wherein the diameter-variable support comprises a top cylinder, a middle cylinder and a bottom cylinder; the middle cylinder can move axially in a center through hole of the upper sealing cover, a sealing guide body is arranged between the middle cylinder and the center through hole and comprises an outer circular body and an inner circular body, first array grooves are formed in the circumference of the outer circular body, second array grooves are formed in the circumference of the inner circular body, and the first array grooves and the second array grooves are distributed alternately; the top cylinder is connected with a high-pressure pump and a vacuum pump through pipelines; a hydrophone fixing clamp is arranged on a bottom wall or a bottom side wall of the bottom cylinder. With the adoption of the structure, the airtightness of the liquid column cylinder is good, additionally, the liquid column cylinder can be prevented from turning on one side, and the axial vibration of the liquid column cylinder can be guided and limited; meanwhile, the hydrophone is stably fixed and is not prone to loosening, and test data are accurate.