Side acceleration perturbation motion resistant resonant vibration barrel pressure pickup

Abstract

A resonant cylinder pressure sensor resistant to lateral acceleration disturbances, comprising a thin-walled cylinder with an elastic resonance sensitive element, an upper end cover of the thin-walled cylinder, a base, three horizontal support arms, an inner hoop, an outer hoop, an elastic notch of the outer hoop, and a protective shell , the thin-walled cylinder and the protective shell are fixed on the base together, the busbars are parallel to each other and perpendicular to the base; the inner clamp is connected with the upper end cover of the thin-walled cylinder with interference fit; the outer clamp has an elastic gap to make the shell hoop narrow in the gap produce outward elastic tension, and use this force to firmly connect with the inner wall of the protective shell; there are three horizontal support arms between the inner clamp and the outer clamp, and the three horizontal support arms are arranged along the diameter direction of the inner clamp and the outer clamp , the included angle is 120°, the thickness is the same or close to that of the inner hoop and the outer hoop, and is greater than the width of the support arm. The invention counteracts the head swing phenomenon of the cylinder cover caused by the lateral acceleration disturbance, thereby improving the anti-interference ability of the resonant cylinder pressure sensor to the lateral acceleration disturbance.

Description

technical field [0001] The invention relates to a resonant cylinder pressure sensor, in particular to a resonant cylinder pressure sensor resistant to lateral acceleration disturbance, which belongs to the field of resonant body structure design. Background technique [0002] The resonant cylinder pressure sensor loads the measured fluid pressure onto the inner wall of the thin-walled cylinder to change the resonance equivalent stiffness of the resonant cylinder, thereby changing the resonant frequency of the thin-walled cylinder. By detecting the resonant frequency of the thin-walled cylinder, it can indirectly detect the load on the inner wall of the thin-walled cylinder. fluid pressure. [0003] However, due to the special structure of the thin-walled cylinder, its top end cover must have a certain thickness in order to ensure the condition of the top of the cylinder wall. Therefore, the inertial force of the top end cover cannot be ignored when bearing the lateral accel...

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Problems solved by technology

Reduced measurement accuracy of resonant barrel pressure sensors

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