Accelerometer |
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| 申请号 | JP25040489 | 申请日 | 1989-09-26 | 公开(公告)号 | JPH02254366A | 公开(公告)日 | 1990-10-15 |
| 申请人 | Automot Syst Lab Inc; | 发明人 | REONAADO DABURIYU BEAA; ROBAATO BII KORUTEN; DONARUDO EI DOUDA; | ||||
| 摘要 | PURPOSE: To automatically compensate the temperature effect of a magnetic field by providing a stopping means which is moved along a passage in accordance with the temperature and a switching means which is actuated by means of a magnetic detecting weight which is arranged in the passage when the detecting weight is moved to a second position. CONSTITUTION: A magnetic detecting weight 46 is magnetically pressed against a washer 44 and held at a first position in the passage 24 to a stop 30 until an acceleration input larger than a threshold acts on to a housing 12. When the acceleration input larger than the threshold acts on the housing 12, the weight 46 is moved to a second position in the passage 24. At the second position, the conductive surface 56 of the weight 46 is engaged with a contact 54 and, when the surface 56 is engaged with the contact 54, the contact 54 is electrically bridged by the weight 46. In addition, the movement of the stop 30 in the passage 24 in response to the temperature offsets the temperature effect of a magnetic field generated by the washer 44 and weight 46 and the threshold acting on the weight 46 is nearly constantly maintained over the operating temperature range of a sensor 10. COPYRIGHT: (C)1990,JPO |
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