公开(公告)号：US4926397A

公开(公告)日：1990-05-15

申请号：US434338

申请日：1989-11-13

Applicant: Bob K. Robertson

Inventor： Bob K. Robertson

IPC: B06B1/06 ,  G01V1/20

CPC classification number: B06B1/0666 ,  G01V1/201

Abstract: A hydrophone having a self-contained means for warning an operator that the hydrophone has reached or exceeded a safe design depth limit. The active elements of the hydrophone are bender-type piezoelectric wafers. An internal stop is provided such that in the presence of a hydrostatic pressure that exceeds a safe design limit, the wafers bottom out against the stop. The stop short-circuits the electrical output signals of the wafers, warning the operator that the hydrophone is in danger of destruction.

Abstract translation: 具有独立装置的水听器，用于向操作者警告水听器达到或超过安全的设计深度限制。 水听器的有源元件是弯曲型压电晶片。 提供内部止动件，使得在存在超过安全设计限制的静水压力的情况下，晶片底部抵靠止动件。 停止将晶片的电输出信号短路，警告操作者水听器有破坏的危险。

公开(公告)号：US4926396A

公开(公告)日：1990-05-15

申请号：US418574

申请日：1989-10-10

Applicant: Bob K. Robertson

Inventor： Bob K. Robertson

IPC: B06B1/06

CPC classification number: B06B1/0655

Abstract: In a tubular pressure transducer element, the axial stress imparted to the element is reduced relative to the radial stress by inserting a rigid core inside the tubular element. The reduction in stress is proportional to the ratio between the area of the full diameter of the tubular element and the area of the annulus represented by the wall thickness of the tubular element.

Abstract translation: 在管状压力换能器元件中，通过将刚性芯片插入管状元件内，赋予元件的轴向应力相对于径向应力减小。 应力的减小与管状元件的全直径的面积与由管状元件的壁厚表示的环形空间的面积之比成比例。