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21. 发明授权

US4479391A Resonator force transducer assembly 失效
标题翻译：谐振器力传感器组件
公开(公告)号：US4479391A
公开(公告)日：1984-10-30
申请号：US482041
申请日：1983-04-04
申请人： Gary J. Banik , Errol EerNisse , Walter P. Kistler , Jerome Paros
发明人： Gary J. Banik , Errol EerNisse , Walter P. Kistler , Jerome Paros
IPC分类号： G01L1/10 , G01L1/16 , G01P15/097 , G01P15/10
CPC分类号： G01P15/097 , G01L1/106 , G01L1/162 , Y10S73/01
摘要： A resonator force transducer assembly includes an elongate base element, a first arm disposed generally in parallel with a front portion of the base element, a first hinge joining the arm near a rear end thereof to the base element at about the middle thereof, an elongate resonator element such as a quartz crystal attached to the front ends of the arm and base element to extend therebetween, a second arm disposed generally in parallel with a rear portion of the base element, and a second hinge joining the second arm to the base element. A third hinge joins the front end of the second arm to the rear end of the first arm to form a type of compound lever arrangement so that when a force is applied to the second arm to urge it either toward or away from the base element, a portion of this force is transmitted via the third hinge to the first arm to urge it either away from or toward the base element to thereby stress the quartz resonator element. The force applied to the second arm can be measured by causing the quartz resonator element to vibrate and then taking measurements of the change in frequency with the application of force. To protect the quartz resonator element and the rest of the force transducer assembly from corrosive effects of the environment and from ambient perturbations which may introduce error in the force measurement, the entire assembly is disposed in a vacuum enclosure. The force to be measured is then transmitted to the second arm via a rod which is attached to the arm and which extends through an opening in the enclosure. A seal between the second arm and the opening in the enclosure is provided by bellows, and another bellows in opposing relationship is provided to compensate for the effect of atmospheric pressure on the second arm introduced through the first mentioned bellows.
摘要翻译：谐振器力传感器组件包括细长的基座元件，大致平行于基座元件的前部设置的第一臂，将其后端附近的臂在其中部附近连接到基座元件的第一铰链，谐振器元件，例如附接到臂和基座元件的前端的石英晶体，以在它们之间延伸;大体上平行于基部元件的后部设置的第二臂，以及将第二臂连接到基座元件的第二铰链。第三铰链将第二臂的前端连接到第一臂的后端以形成一种复合杆装置，使得当力施加到第二臂以将其推向或远离基座元件时，该力的一部分经由第三铰链传递到第一臂，以将其推离或离开基座元件，从而使石英振子元件受到应力。施加到第二臂的力可以通过使石英振动元件振动并随后通过施加力来测量频率变化来测量。为了保护石英谐振器元件和力传感器组件的其余部分免受环境的腐蚀影响和可能在力测量中引起误差的环境扰动，整个组件设置在真空外壳中。待测量的力然后通过杆连接到第二臂，该杆连接到臂上并延伸穿过外壳中的开口。第二臂和外壳中的开口之间的密封由波纹管提供，并且提供相反关系的另一个波纹管以补偿通过第一提到的波纹管引入的第二臂上的大气压力的影响。

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