Hall sensor adaptive initialization system and method based on closed-loop feedback

By integrating a closed-loop feedback Hall sensor adaptive initialization system, the problem of Hall sensors relying on external microprocessors in complex magnetic field environments is solved. This system achieves high-precision, fast-response autonomous initialization, reduces system complexity and resource consumption, and is suitable for various application scenarios.

CN122330780APending Publication Date: 2026-07-03陈昀
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Patent Information

Application Number
CN202610604730.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-06-04
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing Hall sensors rely on external microprocessors during initialization in complex background magnetic field environments, resulting in high system complexity, slow response, and high resource consumption, making it difficult to meet the requirements for high autonomy.

Method used

The Hall sensor adaptive initialization system adopts closed-loop feedback, integrating a Hall semiconductor sensing unit, micro-coil circuit, micro-coil driving circuit, compensation and signal conditioning circuit, analog-to-digital converter and initialization control logic unit to achieve on-chip autonomous initialization. It dynamically adjusts the micro-coil current through closed-loop feedback to counteract the ambient magnetic field and supports multiple triggering modes.

Benefits of technology

It achieves high-precision, fast-response initialization without external MCU intervention, reduces system resource consumption, supports multiple triggering methods, and is suitable for automotive electronics, industrial servo systems, and low-cost IoT devices.

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Abstract

The invention discloses a Hall sensor adaptive initialization system and method based on closed-loop feedback, and belongs to the technical field of integrated circuit design and magnetic sensors. The system is integrated in a Hall sensor integrated circuit, and comprises a Hall semiconductor induction unit, a micro-coil circuit unit, a micro-coil driving circuit unit, a compensation and signal conditioning circuit unit, an analog-to-digital converter unit, a power management unit and an initialization control logic unit. The initialization control logic unit continuously obtains a Hall output value in an initialization mode, compares the Hall output value with a preset reference value to generate an error signal, and dynamically adjusts the current direction and size of the micro-coil through closed-loop feedback until the Hall output is converged in a reference value tolerance range. According to the invention, interference of an external microprocessor is not needed, 'perception-decision-execution 'full-link on-chip closed-loop self-adaptive initialization is realized, multiple modes such as power-on automation, external enabling and over-limit retriggering are supported, and the method has the advantages of high initialization precision, high response speed, low system resource occupation and easiness in industrialization; the method can be widely applied to the fields of automotive electronics, industrial servo, low-cost Internet of Things equipment and the like.
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