公开(公告)号：US3618360A

公开(公告)日：1971-11-09

申请号：US3618360D

申请日：1969-08-28

Applicant: SOLARTRON ELECTRONIC GROUP

Inventor： CURTIS IAN F M

IPC: G01L9/00 ,  G01N9/00 ,  G01F1/00 ,  G01N29/02

CPC classification number: G01N9/002 ,  G01L9/0008

Abstract: A TRANSDUCER FOR MEASURING FLUID DENSITY OR PRESSURE OR PRESSURE DIFFERENCE HAS A HOLLOW CYLINDRICAL BODY WITH INTEGRAL CIRCUIT FLANGES AT ONE END. THE FLANGES OVERLAP AXIALLY OF THE BODY TO PROVIDE AN ELASTICALLY FLEXIBLE CONNECTION THEREBETWEEN. IN USE, THE BODY IS SET INTO VIBRATION WHILE IN CONTACT WITH FLUID SO THAT THE FREQUENCY OF THE VIBRATION IS AFFECTED BY THE DENSITY OR PRESSURE OR PRESSURE DIFFERENCE IN THE FLUID. ONE OF THE FLANGES ESTABLISHES A NODE AT THE CORRESPONDING END OF THE HOLLOW BODY, AND THE OTHER FLANGE ENABLES THE HOLLOW BODY TO BE MOUNTED ON A SUPPORTING STRUCTURE WITHOUT INTERFERING WITH THE NODE-FORMING FLANGE.

公开(公告)号：US3600614A

公开(公告)日：1971-08-17

申请号：US3600614D

申请日：1969-11-10

Applicant: SOLARTRON ELECTRONIC GROUP

Inventor： CURTIS IAN F M

IPC: G01L1/10 ,  H02K35/00

CPC classification number: G01L1/106

Abstract: A force transducer in which a strut is fixed at one end and has the other end coupled to an arrangement for applying force in the axial direction of the strut. In operation, transverse vibration of a length of the strut is maintained by feedback from a pickup coil to a drive coil through an amplifier, the frequency being a measure of the axial force to which the strut is subjected. Adjacent the said other end a node is formed by a clamp gripping a portion of the strut. This clamp includes rolling bearings arranged to permit axial movement of the gripped portion of the strut.