Hall Sensor Detection in Detachable Smart Device Bodies
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Solution Overview
Problem
Existing intelligent devices with detachable bodies face challenges in accurately detecting their connection status due to external interference, leading to low detection accuracy.
Innovation Solution
The use of a Hall effect sensor and strategically positioned attraction magnet pairs with opposite polarities and orientations to minimize magnetic field interference, allowing the sensor to accurately detect the attracted or separated state of detachable bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distance detection, infrared detection, or Hall effect sensor detection is used to detect connection status, then the device can detect whether bodies are separated, but external interference reduces detection accuracy
Solution Approach 1:
The patent introduces an induced magnet as an intermediary between the attraction magnet and the Hall effect sensor. The induced magnet is attracted to the attraction magnet, and its movement triggers the Hall effect sensor to detect the connection status. This intermediary mechanism isolates the sensor from direct exposure to external magnetic interference while maintaining accurate detection capability.
Solution Approach 2:
The patent extracts the detection function from direct magnetic field sensing and separates it into two stages: first, the induced magnet responds to the attraction magnet's field; second, the Hall effect sensor detects the induced magnet's position. This separation allows the system to detect connection status while being less susceptible to external magnetic interference.
2Measurement precision
If attraction magnets are positioned close to the Hall effect sensor to improve detection sensitivity, then detection accuracy improves, but magnetic field interference on the sensor increases
Solution Approach 1:
The induced magnet serves as a mediator that translates the attraction magnet's magnetic field into a detectable position change. The Hall effect sensor detects the induced magnet's position rather than directly sensing the attraction magnet's strong magnetic field, thereby maintaining sensitivity while reducing interference.
Solution Approach 2:
The patent changes the detection dimension from direct magnetic field strength measurement to position-based detection. The Hall effect sensor detects the change in position of the induced magnet, which indirectly reflects the connection status. This dimensional transformation allows the system to avoid direct exposure to strong magnetic fields while maintaining detection sensitivity.
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
This configuration enhances the detection accuracy of the intelligent device's state, enabling reliable determination of usage and triggering power-saving modes, while reducing the impact of magnetic fields on the sensor.
Implementation Method 1
A Hall effect sensor and a first attraction magnet pair are disposed in the first body; and an induced magnet and a second attraction magnet pair are disposed in the second body
Implementation Method 2
The first body is attracted to the second body by using the first attraction magnet pair and the second attraction magnet pair. The first attraction magnet pair includes a third attraction magnet and a fourth attraction magnet close to the third attraction magnet. Magnetic poles of the third attraction magnet and the fourth attraction magnet are opposite
Data Source
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AI summary
An intelligent device having detachable bodies is disclosed. A Hall effect sensor and a magnet are respectively disposed on two detachable bodies, and the Hall effect sensor detects a magnetic field of the magnet to determine whether the two bodies are in an attracted state. In addition, an attraction magnet pair needs to be disposed on each of the two bodies, to implement attraction of the two bodies. Each attraction magnet pair includes two magnets having opposite polarities and disposed side by side. Such an attraction magnet combination reduces strength of a magnetic field in a direction of a non-magnetic pole, thereby reducing impact on detection on the magnetic field by the Hall effect sensor.