Magnetic Sensor Protective Cover for Seat Position Detection
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Solution Overview
Problem
Existing seat status detecting devices are prone to performance deterioration due to foreign objects of magnetic material attaching to the magnetic sensors, which affects the accuracy of seat position detection and air bag deployment effectiveness.
Innovation Solution
A seat status detecting device with a magnetic sensor mounted on the upper rail and covered by a protective resin cover, which includes a shield cover as a decorative part, preventing foreign magnetic objects from interfering with the sensor's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic sensor is mounted on the seat slide portion to detect seat position, then seat status detection capability is achieved, but detection performance deteriorates when foreign magnetic objects attach to the sensor
Solution Approach 1:
A protective cover is introduced as an intermediary component between the magnetic sensor and the external environment. This cover prevents foreign magnetic objects from directly contacting and attaching to the sensor, thereby maintaining detection accuracy while allowing the sensor to continue functioning. The cover acts as a barrier that mediates the interaction between the sensor and potential contaminants.
Solution Approach 2:
The protective cover is designed as a thin-walled structure that surrounds the magnetic sensor. This thin film approach provides protection against foreign magnetic objects while maintaining the magnetic field detection capability of the sensor. The cover is sufficiently thin to allow magnetic field penetration but sufficient to prevent direct contact with contaminants.
2Reliability
If a protective cover is added to the magnetic sensor to prevent foreign object attachment, then detection performance reliability is improved, but device complexity increases
Solution Approach 1:
The protective cover is designed to serve multiple functions simultaneously: it protects the magnetic sensor from foreign magnetic objects, provides structural support for mounting the sensor on the seat slide portion, and can be integrated with existing seat components. This multi-functionality reduces the need for additional separate protective components, thereby limiting the increase in device complexity.
Solution Approach 2:
The protective cover is merged with the mounting structure of the magnetic sensor. Rather than being a separate add-on component, the cover is integrated into the sensor assembly itself, combining the protective function with the mounting function. This integration reduces the number of discrete parts and simplifies the overall assembly process.
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
The protective cover ensures the detection performance of the magnetic sensor is maintained even when foreign magnetic objects are present, enhancing the reliability of seat position detection and air bag deployment by preventing interference.
Implementation Method 1
a magnetic sensor provided at the seat slide portion for detecting a seat status
Data Source
AI summary
A seat status detecting device includes a seat status detecting device includes a seat slide portion provided at a seat, a magnetic sensor provided at the seat slide portion for detecting a seat status, and a protective cover assembled to the magnetic sensor for surrounding the magnetic sensor.