Magnetic Sensor Control for Azimuth Accuracy and Power Efficiency
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Solution Overview
Problem
Electronic devices equipped with magnetic sensors face challenges in accurately detecting azimuth due to magnetic fields generated by magnetic connectors, leading to erroneous readings and increased power consumption during data transmission and charging.
Innovation Solution
Incorporating a CPU-controlled magnetic sensor system that detects connection status via a magnetic connector and adjusts the magnetic sensor's operation accordingly, either suspending measurements or entering a power-saving mode when connected, to prevent interference and reduce power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the magnetic sensor continuously performs measuring operations, then measurement precision is maintained, but power consumption increases and erroneous readings occur due to magnetic connector interference
Solution Approach 1:
The magnetic sensor dynamically adjusts its operating state based on connection status. When a magnetic connector is detected, the sensor transitions from continuous measurement mode to a stopped state, avoiding erroneous readings while conserving power. This dynamic adaptation resolves the contradiction between maintaining measurement precision and reducing power consumption.
Solution Approach 2:
The system uses feedback from the magnetic connector detection mechanism to control the magnetic sensor operation. The detection unit provides real-time information about connector presence, and the control unit adjusts sensor operation accordingly, ensuring accurate azimuth detection only when measurements are valid and reducing power consumption when connectors are present.
2Measurement precision
If the magnetic sensor operates continuously, then real-time azimuth detection is maintained, but erroneous readings occur due to magnetic field interference from the connector
Solution Approach 1:
The system performs preliminary detection of the magnetic connector before azimuth measurement. By detecting the presence of the magnetic connector in advance, the system can prevent erroneous measurements by stopping the magnetic sensor before interference occurs, thereby eliminating the harmful effect of magnetic field interference on measurement precision.
Solution Approach 2:
The detection unit continuously monitors for magnetic connectors and provides feedback to the control unit. When interference is detected or anticipated, the system adjusts sensor operation to avoid erroneous readings, maintaining measurement precision by preventing exposure to harmful magnetic field interference.
3Use of energy by moving object
If the magnetic sensor is stopped during connection, then power consumption is reduced and erroneous readings are prevented, but azimuth detection is unavailable during charging or data transmission
Solution Approach 1:
The magnetic sensor operates dynamically, being active when azimuth detection is needed and stopped when magnetic connectors are present. This dynamic operation reduces power consumption during charging/data transmission while maintaining azimuth detection availability during normal operation, resolving the contradiction between power efficiency and functional availability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents erroneous azimuth detection and reduces power consumption by disabling unnecessary magnetic sensor operations during connection, ensuring accurate readings and efficient power management.
Implementation Method 1
a magnetic sensor which detects a magnetic field around the electronic device
Implementation Method 2
a magnetic connector including a magnet which is positioned on one end side of a connection cable
Data Source
AI summary
An electronic device equipped with a magnetic sensor which detects a magnetic field around the electronic device, a connector connection section to connect to a magnetic connector including a magnet which is positioned on one end side of a connection cable, and a CPU, in which the CPU controls to stop a measuring operation in the magnetic sensor when judged that the connector connection section is connected to the magnetic connector.