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AMR방식 SAS와 Optical방식 SAS의 Hysteresis 특성 비교에 관한 연구
남철(Chul Nam),전민석(Minseok Jeon),표재우(Jaewoo Pyo),박기범(Kibum Park),이석우(Seagwoo Lee),이대성(Daesung Lee) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, we confirmed Hysteresis characteristic in absolute angle detect SAS(Steering Angle Sensor) with AMR (Anisotropic Magneto Resistance) type sensor and implemented back-lashless Optical Type SAS with symmetrical PWM code to improve Hysteresis. We expected good result at Hysteresis characteristic but faced problems such as roter’s gap with the steering shaft and delay time caused by angle calculation algorithm. If we solve these problems Optical type SAS will become a better Steering Angle Sensor.
AMR방식 SAS의 Magnetic Field 특성에 관한 연구
남철(Chul Nam),전민석(Minseok Jeon),표재우(Jaewoo Pyo),이석우(Seagwoo Lee),이대성(Daesung Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the effect of magnetic field on Steering Angle Sensor (SAS) with AMR sensor. The AMR sensor uses the magnetoresistive effect, so it may have some errors caused by non-standard magnetic field components. For example week magnetic field, non-symmetrical sensor for magnet arrangement, influence of external magnetic field, we have analyzed these error components for optimized design of SAS.
Backlash제거를 위해 Multi-Magnet Disc를 이용한 절대각 센서
박성우(Sungwoo Park),노지형(Jihyoung Roh),전민석(Minseok Jeon),남철(Chul Nam),표재우(Jaewoo Pyo),이석우(Seagwoo Lee),공준호(Junho Gohng),문병무(Byungmoo moon),이대성(Daesung Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
These days absolute steering angular sensor(SAS) is used in vehicles as a component of electric power steering, anti-collision system, ASS/ESP, auto light system, auto parking system and so on. A number of SASs are developed and used in companies and research institution. The sensors are mostly magnetic type because of non-contact type and prevention of pollution. Most magnetic type SAS have used AMR sensors and gears. But this method has the backlash problem. So we use a multi-magnet disc for elimination of backlash without gears. Hall IC is used to SAS for multi-magnet's magnetic flux is measured. As a result, characteristics of this method are resolution which is 0.014° and elimination of backlash problem.