Solenoid Driving Module with Hall Sensor Position Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing dual clutch transmission systems face challenges in accurately detecting the position of a solenoid due to external disturbances and limited space, leading to increased device size and measurement errors.

Innovation Solution

A driving module with a solenoid and printed circuit board configuration where the solenoid's shaft moves vertically, and a three-axis Hall sensor detects magnetic flux without external interference, allowing for precise position detection and reduced component count, thereby minimizing size and manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the position detecting sensor is arranged at a distance spaced apart from the solenoid to avoid external disturbance, then the measurement precision is improved, but the device size increases

Engineering Contradiction:

Improveposition detection accuracyVSAvoiddevice size

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The patent replaces the mechanical arrangement of spacing components apart with an electromagnetic field-based detection system. The three-axis Hall sensor detects the magnetic field generated by the sensor magnet on the shaft, allowing position detection without physical distance requirements. This substitution of mechanical spacing with electromagnetic field sensing resolves the contradiction by enabling accurate detection while maintaining compact dimensions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from mechanical distance-based sensing to magnetic field-based sensing. By using the three-axis Hall sensor to detect magnetic flux components along three orthogonal axes, the system achieves position detection accuracy without requiring the sensor to be positioned at a specific distance from the solenoid, thus resolving the size-precision contradiction.

Inventive Principle:

Principle #35Parameter changes

2Volume of moving object

If the position detecting sensor is arranged close to the solenoid to reduce device size, then the device size is reduced, but the measurement precision deteriorates due to external disturbance

Engineering Contradiction:

Improvedevice sizeVSAvoidposition detection accuracy

Core Design Contradiction:

Volume of moving objectVSMeasurement precision

Solution Approach 1:

The patent replaces distance-based mechanical positioning with electromagnetic field sensing. The three-axis Hall sensor measures the magnetic field vector components, allowing the sensor to be positioned close to the solenoid without suffering from external disturbance effects that would plague mechanical contact-based sensors. This enables compact design while maintaining precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces the magnetic field as an intermediary between the shaft position and the detection sensor. The sensor magnet on the shaft generates a magnetic field that the three-axis Hall sensor detects, allowing indirect position measurement that is immune to mechanical interference and external disturbances, thus enabling close positioning without precision loss.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If multiple separate components are used for solenoid and sensor arrangement, then the ease of manufacture is improved, but the device complexity increases

Engineering Contradiction:

Improvecomponent assemblyVSAvoidcomponent count

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent merges the position detection function directly into the solenoid assembly by integrating the sensor magnet onto the solenoid shaft and positioning the three-axis Hall sensor on the same housing. This integration reduces the number of separate components and simplifies the overall device structure while maintaining manufacturing ease through standardized mounting procedures.

Inventive Principle:

Principle #5Merging (Combining)

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 solution enables low-error position detection of the solenoid without external disturbance, facilitates miniaturization, and reduces manufacturing costs by integrating components and eliminating unnecessary space.

Implementation Method 1

a three-axis Hall sensor detects magnetic flux without external interference, allowing for precise position detection

Methodology Applied

Scientific EffectHall effect: Hall Effect

Implementation Method 2

The shaft 7 can be linearly moved by the electromagnetic interaction between the plunger 6 and the stator 5

Methodology Applied

Scientific EffectElectromagnetic interaction: Electromagnetic Induction

Data Source

PatentUS11473677B2Driving module and transmission

Publication Date: 2022.10.18 LG INNOTEK CO LTD

AI summary

A driving module comprises: a housing; a housing; a solenoid comprising a shaft arranged inside the housing so as to make a straight movement; and a printed circuit board arranged on the solenoid, wherein the solenoid comprises a stator, a plunger arranged inside the stator, a shaft coupled to the plunger, and a sensor magnet arranged on the upper side of the shaft, and the printed circuit board comprises a hole penetrated by the shaft and comprises a position detecting sensor arranged on the printed circuit board to be adjacent to the hole.