Design of Shielding Structure to ensure the safety of Hall Sensor Output Signal from the influence of external magnetic field : 외부 자계의 영향에서 홀 센서 출력신호 안전성을 확보하기 위한 차폐구조 설계

다국어 초록 (Multilingual Abstract)

Although the use of switches and contact sensors in automobile parts was high, non-contact sensing methods were proposed as a technology to compensate for high defects due to mechanical durability limits and carbonization and wear of switch contacts. Among them, the Hall sensor is the most commonly used sensor. The precision of the rotation angle Of a Hall sensor is currently widely used because it detects a precise angle within an error range of less than 1%. However, Hall sensors may be affected by disturbance of external magnets. The interaction between the magnetic field of the inner magnet and the magnetic field of the outer magnet results in poor sensor accuracy. To improve this, we will find a shielding method of shielding the external magnetic field using magnetic materials and a method of improving the measurement stability of the Hall sensor by analyzing the magnetic field phenomenon passing through the magnetic material. Therefore, it is proposed to digitize the degree of external magnetic field shielding to ensure stability and to maintain the accuracy of the sensor (design of disturbance resistance by an external magnet) at 5% or less Keywords: Hall effect, strength of magnetic field, influence of external magnetic field, magnetic field shielding structure

목차 (Table of Contents)

• I. Introduction 1
• II. Related Research 5
• III. System Configuration and Implementation 6
• 3.1 System Configuration 6
• 3.1.1 System Overview 6
• 3.1.2 Changes in magnetic field according to magnetization direction of permanent magnets 7
• 3.1.3 Definition of HALL IC 10
• 3.1.4 Definition of external magnetic field 14
• 3.1.5 Definition of shielding material 15
• 3.2 Implementation 18
• 3.2.1 Basic Configuration of Hall Sensor 18
• 3.2.2 Composition Considering Shielding 19
• IV. Experiments 21
• 4.1 Experimental Environment 21
• 4.2 Impact of external magnetic field 24
• 4.3 Apply shielding structure 28
• 4.4 Shield Analysis 31
• 4.5 Shielding Analysis with Tools 36
• 4.5.1 Analysis of the proposed shielding structure 36
• 4.5.2 Analysis of the 3.0mm Shielding Structure 37
• 4.5.3 Analysis of the 2.5mm Shielding Structure 40
• 4.5.4 Analysis of the 2.0mm Shielding Structure 42
• V. Conclusion 44
• VI. References 47