公开(公告)号：US5408888A

公开(公告)日：1995-04-25

申请号：US297917

申请日：1994-08-31

Applicant: Peter T. Goodier

Inventor： Peter T. Goodier

IPC: G01G3/16 ,  G01L1/10 ,  G01L1/00

CPC classification number: G01L1/106 ,  G01G3/165

Abstract: An apparatus for measuring a force or load comprising a vibratory beam which vibrates back and forth at a resonant frequency. The beam has first and second end nodal points and first and second ends adjacent to the first and second nodal points. The first end of the vibratory beam is coupled to the load for applying a stress to the vibratory beam that determines the resonant frequency at which the beam vibrates. In addition, masses are coupled to the beam intermediate of the first and second ends. The masses are arranged symmetrically on opposite sides of the beam and reciprocate at the resonant frequency. The reciprocatory masses are located at a position along the beam at which the greatest back and forth vibration of the beam at the resonant frequency occurs. Alternatively, a pair of vibratory beams are provided. The beams are coupled together at opposite ends to form a tuning fork, each beam having a portion which vibrates back and forth at a resonant frequency. Masses are coupled to these portions of each of the beams, the masses being arranged symmetrically relative to each beam and reciprocating at the resonant frequency.

Abstract translation: PCT No.PCT / AU90 / 00118 Sec。 371日期：1992年9月23日 102（e）日期1992年9月23日PCT 1990年3月23日PCT公布。 公开号WO88 / 00334 日期：1988年1月14日。一种用于测量力或载荷的装置，包括以共振频率来回振动的振动梁。 梁具有第一和第二端节点以及与第一节点和第二节点相邻的第一和第二端。 振动梁的第一端耦合到用于向振动梁施加应力的负载，其确定梁振动的共振频率。 此外，质量联接到第一和第二端的中间的梁。 质量对称地布置在梁的相对侧上，并以共振频率往复运动。 往复运动质量块位于沿着波束的位置处，在该位置处发生谐振频率处的波束的最大的前后振动。 或者，提供一对振动梁。 梁在相对端耦合在一起以形成音叉，每个梁具有以共振频率来回振动的部分。 质量耦合到每个梁的这些部分，质量相对于每个梁对称地布置并以共振频率往复运动。

公开(公告)号：US4773493A

公开(公告)日：1988-09-27

申请号：US69029

申请日：1987-07-01

Applicant: Peter T. Goodier

Inventor： Peter T. Goodier

IPC: G01G3/16 ,  G01L1/10 ,  G01G3/14

CPC classification number: G01L1/106 ,  G01G3/16

Abstract: The invention relates to a weight measuring apparatus utilizing a vibration type force sensor having a greatly increased Q and being inexpensive and easy to manufacture. The force sensor includes a single vibratory beam or a pair of vibratory beams, which oscillate at a particular measurement frequency related to the stress applied to the sensor by a weight. A rotational mass is coupled to a nodal point of the vibratory beam at the measurement frequency, and greatly influence the frequency at which the beam will vibrate. As a result, the tolerances for manufacture of the force sensor are greatly relaxed, and the pendulum-like movement of the rotational masses for a double-ended tuning fork type sensor tends to override any mismatch between the two parallel vibratory beams.

Abstract translation: 本发明涉及一种使用具有大大增加的Q并且便宜且易于制造的振动型力传感器的重量测量装置。 力传感器包括单个振动梁或一对振动梁，其以与通过重量施加到传感器的应力相关的特定测量频率振荡。 旋转质量以测量频率耦合到振动束的节点，并且极大地影响光束将振动的频率。 结果，力传感器的制造公差被大大地放松，并且用于双端音叉型传感器的旋转质量块的摆式运动倾向于超越两个平行振动梁之间的任何不匹配。