Packaging structure for mass point vibration velocity measurement sensor

Abstract

The invention relates to a packaging structure for a mass point vibration velocity measurement sensor. The packaging structure comprises an upper housing (10), an inner core (20), and a lower housing (30). A plurality of windows (11) are opened at the upper part of the upper housing (10) in a peripheral direction. The inner core (20) is accommodated into an inner cavity formed by the upper housing (10) and the lower housing (30) jointly; the upper end of the inner core (20) is a rectangular-column-shaped body; and three mass point vibration velocity sensors (21) are arranged at three planes perpendicular to each other. Front amplification circuit boards of the sensors (21) are arranged at the lower housing (30). Long-strip-shaped cylinders (12) are arranged at the two sides of each window (11) of the upper housing (10); and the three mass point vibration velocity sensors (21) arranged at the three adjacent side surfaces of the rectangular-column-shaped body at the upper end of the inner core (20) are close to the long-strip-shaped cylinders (12) in a face-to-face mode without any contact. Because the long-strip-shaped cylinders are arranged opposite to the mass point vibration velocity sensors in the upper housing and play a role in extrusion of the mass point flow of the sound field, so that the mass points flowing through the mass point vibration velocity sensors can flow fast on the condition of the same sound pressure at the same sound field and thus the measurement sensitivity of the mass point vibration velocity sensors can be improved effectively.

Description

technical field [0001] The invention relates to the field of sensors, and is mainly used for improving the measurement sensitivity of sensors, in particular to a package structure of a particle vibration velocity measurement sensor. Background technique [0002] The particle velocity measurement sensor is mainly composed of three particle velocity sensors that satisfy the orthogonal relationship of the Cartesian coordinate system, which can obtain the particle velocity information of the sound field in the three-dimensional direction of space (v x ,v y ,v z ). The particle velocity sensor uses a platinum wire with stable resistance temperature characteristics as a sensitive element to measure the particle velocity information in the sound field. [0003] The packaging structure of the existing particle velocity measurement sensor is as follows: figure 2 As shown, it is composed of an upper shell 10, a lower shell 30, an inner core 20, and an electrical connector (not sho...

AI Technical Summary

Problems solved by technology

However, under this packaging architecture, the measurement sensitivity of the particle velocity sensor 21 is small, which cannot meet the requirements for the effective acquisition of far-field broadband sound source signals.

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