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Accelerometer employing main and auxiliary beam structure

A technology of accelerometer and auxiliary beam, which is applied in the field of measurement, can solve the problems of inaccurate measurement results, etc., and achieve the effect of improving static sensitivity and ensuring measurement accuracy

Inactive Publication Date: 2014-05-14
XIAN DAOHENG TRANSPORTATION EQUIP TECHCO
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Problems solved by technology

However, the static sensitivity and natural resonance frequency of the existing accelerometer are determined by a cantilever beam, and the static sensitivity and the natural resonance frequency are inversely proportional to each other, so the measurement results are not accurate enough

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  • Accelerometer employing main and auxiliary beam structure

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Embodiment Construction

[0010] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0011] As shown in the figure, the present invention is an accelerometer with a main and sub-beam structure, including a closed regular quadrilateral frame 4, a concave mass block 3 at the center of the frame 4, and the concave portion of the mass block 3 passes through the main cantilever The beam 1 is connected to the outer frame 4, and the convex parts on both sides of the concave part of the mass block 3 are respectively connected to the outer frame 4 through a sub-beam 2. The elastic coefficient of the main cantilever beam 1 is 6000N / m, and the elastic coefficient of the sub-beam 2 is 120N / m. m, the length of the main cantilever 1 is 4000 μm, the length of the sub-beam 2 is 80 μm, the width of the main cantilever 1 is 100 μm, and the width of the sub-beam 2 is 2 μm, wherein the surface of the sub-beam 2 is provided with a force-sensitive resi...

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Abstract

Disclosed is an accelerometer employing a main and auxiliary beam structure. The accelerometer comprises an enclosed square outer frame. The central portion of the outer frame is provided with a concave mass block; the depressed portion of the mass block is connected with the outer frame through a main cantilever beam; the projection portions at the two sides of the depressed portion of the mass block are each connected with the outer frame through an auxiliary beam; the elasticity coefficient of the main cantilever beam is 50 times that of the auxiliary beam; the width of the main cantilever beam is 50 times that of the auxiliary beam; and the length of the main cantilever beam is 50 times that of the auxiliary beam. The accelerometer provided by the invention can maintain an inherent resonant frequency while improving static state sensitivity, thereby ensuring measuring precision.

Description

[0001] technical field [0002] The invention relates to the field of measurement technology, in particular to an accelerometer adopting a main and auxiliary beam structure. Background technique [0003] Accelerometers are widely used in navigation and automotive industries. There are many types of accelerometers. The basic forms are capacitive and resistive. The structure is to connect a mass block with a cantilever beam in the outer frame. The acceleration causes the outer frame and the mass block. The relative displacement changes the internal stress of the cantilever beam. According to the relative displacement and stress, the corresponding acceleration value can be obtained. However, the static sensitivity and natural resonant frequency of the existing accelerometer are determined by a cantilever beam, and the static sensitivity and the natural resonant frequency are inversely proportional to each other, which makes the measurement result inaccurate. Contents of the i...

Claims

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Application Information

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IPC IPC(8): G01P15/12
Inventor 不公告发明人
Owner XIAN DAOHENG TRANSPORTATION EQUIP TECHCO
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