An oscillator circuit and a sensing device for long-distance detection.

CN224289750UActive Publication Date: 2026-05-26MIBO (XIAMEN) INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
MIBO (XIAMEN) INTELLIGENT TECH CO LTD
Filing Date
2025-07-15
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional proximity switches have a short sensing distance, which cannot meet the needs of long-distance detection and limits their application in remote monitoring of large equipment and long-distance material detection in complex production lines.

Method used

A push-pull self-excited oscillator structure is adopted, combined with inductors and resonant capacitors, to generate an alternating magnetic field through an inductive resonant circuit. The transistors in the push-pull amplifier circuit are alternately turned on and off, combined with rectification protection and signal adjustment circuits, to amplify and protect the oscillation signal.

Benefits of technology

It achieves high-sensitivity detection of external metals, enhances the sensing distance, is suitable for long-distance detection, and improves the accuracy and flexibility of detection.

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Abstract

This invention provides an oscillator circuit and a long-distance detection sensing device, including a push-pull amplifier circuit, an inductive resonant circuit, a rectifier protection circuit, and a signal adjustment circuit. The inductive resonant circuit generates an alternating magnetic field to produce an oscillation signal. The push-pull amplifier circuit includes a first transistor and a second transistor to amplify the oscillation signal. The rectifier protection circuit and the signal adjustment circuit are used to protect the circuit and adjust the oscillation signal, respectively. This circuit improves the sensing sensitivity to external metal, achieving long-distance detection and solving the problem of insufficient sensing distance in existing proximity switches.
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