| 发明名称 |
Method and a device for attracting magnetic particles to a surface |
| 摘要 |
Magnetic particles (1) are attracted to a contact surface (11) in an associated sensor device (100) by generating a pulsed magnetic field (B) according to an actuation protocol. The protocol includes a “local attraction phase” during which the duty cycle of the pulsations is smaller than about 10%, preferably ranging between 2% and 5%. These small duty cycles are advantageous in bringing magnetic particles (1) into actual contact with the contact surface (11). |
| 申请公布号 |
US9207210(B2) |
申请公布日期 |
2015.12.08 |
| 申请号 |
US201113821022 |
申请日期 |
2011.09.07 |
| 申请人 |
Koninklijke Philips N.V. |
发明人 |
Ovsyanko Mikhail Mikhaylovich |
| 分类号 |
G01N27/74;H01F7/06;G01N33/543;G01R33/12;G01N21/552;G01N35/00 |
主分类号 |
G01N27/74 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for attracting magnetic particles to a contact surface comprising:
generating a pulsed magnetic field with a duty cycle larger than about 25% to create a “global attraction phase” which concentrates magnetic particles at the contact surface and generating the pulsed magnetic field with the duty cycle smaller than about 10% to create a “local attraction” phase in which the magnetic particles are attracted and diffuse to contact the contact surface. |
| 地址 |
Eindhoven NL |
