Physical quantity detection device

Abstract

The invention relates to a physical quantity detection device, which comprises at least one group of detection units, each group of detection units comprises two detection chips; each detection chip comprises at least one pair of Hall elements, a magnetic collection sheet, a Hall carrier plate, a first packaging body, a second packaging body and a secondary frame; the magnetic collecting sheet is a symmetrical structure body; the magnetic collecting sheet is arranged on the Hall carrier plate; the Hall carrier plate is fixed on the secondary frame; the two Hall elements in each pair of Hall elements are respectively arranged at two mutually symmetrical positions on the magnetic collecting sheet; the at least one pair of Hall elements, the Hall carrier plate and the secondary frame are packaged on the first packaging body to form a structural body for detecting the chip; each group of detection units are symmetrically arranged relative to a preset coordinate axis in a plane, and different groups of detection units are symmetrically arranged relative to different preset coordinate axes in the plane; and all groups of detection units are packaged on a second packaging body to form a structural body of the target physical quantity detection device. By adopting the physical quantity detection device provided by the invention, the detection precision of the physical quantity can be improved.

Description

technical field [0001] The present application relates to the technical field of magnetic field sensors, and in particular, to a detection device for physical quantities. Background technique [0002] The Hall-type displacement detection device usually realizes displacement measurement based on the Hall effect, and the Hall-type angle detection device usually realizes the angle measurement based on the Hall effect, for example, existing magnetic displacement sensors, magnetic rotary encoders, and the like. [0003] The existing magnetic displacement sensor detects long-distance relative and absolute quantities by reading the magnetic head and the magnetic grating scale; the existing magnetic rotary encoder detects the angle by sensing the presence or absence of ferromagnetic switching quantities. However, the above-mentioned magnetic displacement sensors and magnetic rotary encoders all have the problems of complex structure and low detection accuracy. SUMMARY OF THE INVEN...

AI Technical Summary

Problems solved by technology

However, both the above-mentioned magnetic displacement sensor and magnetic rotary encoder have the problems of complex structure and low detection accuracy.

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