| 发明名称 |
METHOD, SYSTEM AND APPARATUS FOR MAGNETIC SURVEILLANCE OF ARTICLES |
| 摘要 |
<p>Surveillance of magnetically tagged articles in a control zone is effected in a noisy environment by so shielding an antenna establishing a front magnetic field in the control zone as to reduce field strength in the back field rearwardly of the control zone. Shield magnetic material has response to the field which is detectably distinct from tag material response to the field.</p> |
| 申请公布号 |
CA1266311(A) |
申请公布日期 |
1990.02.27 |
| 申请号 |
CA19870533543 |
申请日期 |
1987.04.01 |
| 申请人 |
SENSORMATIC ELECTRONICS CORPORATION |
发明人 |
COPELAND, RICHARD L. |
| 分类号 |
G01V3/10;G08B13/24;(IPC1-7):G07C9/00;A47F7/24 |
主分类号 |
G01V3/10 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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