发明名称 |
Ionization Monitoring Device and Method |
摘要 |
An air ionization monitoring device 200 and method is disclosed herein. In a described embodiment, the air ionization monitoring device 200 comprises an ion source 202 adapted to emit ions 204 and a capacitor 208 including a first conductor 210 arranged to be exposed to the ions 204 emitted by the ion source 202, and a second conductor 212 arranged to be shielded from the ions 204 emitted by the ion source 202. The monitoring device 200 further includes a commutation circuit 234 operable between a first configuration for charging the capacitor 208 to a first predefined voltage, and a second configuration for using the ions 204 emitted by the ion source 202 to discharge the capacitor 208 for a predefined time resulting in the capacitor 208 having a second voltage. The device 200 is configured to use the first and second voltages to determine an ionic current of the emitted ions. |
申请公布号 |
US2014333331(A1) |
申请公布日期 |
2014.11.13 |
申请号 |
US201214360705 |
申请日期 |
2012.12.05 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
Savich Siarhei V. |
分类号 |
G01R19/00 |
主分类号 |
G01R19/00 |
代理机构 |
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代理人 |
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主权项 |
1. An air ionization monitoring device comprising
an ion source adapted to emit ions; a capacitor including a first conductor arranged to be exposed to the ions emitted by the ion source, and a second conductor arranged to be shielded from the ions emitted by the ion source; and a commutation circuit operable between a first configuration for charging the capacitor to a first predefined voltage, and a second configuration for using the ions emitted by the ion source to discharge the capacitor for a predefined time resulting in the capacitor having a second voltage, the device using the first and second voltages to determine an ionic current of the emitted ions. |
地址 |
St. Paul MN US |