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1. 发明申请

US20190219531A1 PULSED WAVE GUIDE LIQUID QUALITY MEASUREMENT 审中-公开
公开(公告)号：US20190219531A1
公开(公告)日：2019-07-18
申请号：US16364742
申请日：2019-03-26
申请人： Littelfuse, Inc.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： G01N27/02
CPC分类号： G01N27/025
摘要： A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.

2. 发明授权

US10054476B2 Floatless pulsed wave guide liquid level measurement 有权
公开(公告)号：US10054476B2
公开(公告)日：2018-08-21
申请号：US14792685
申请日：2015-07-07
申请人： LITTELFUSE, INC.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： G01R27/28 , G01F23/284
CPC分类号： G01F23/284
摘要： A waveguide arrangement may include a tank defining a chamber for holding a liquid; and a pulsed waveguide (PWG) disposed at least partially within the chamber, the PWG comprising: an inner cylinder, the inner cylinder being grounded. The waveguide may also include an electrically conductive coil wrapped around the inner cylinder, wherein the pulsed waveguide is arranged to generate a first delay between a first initial pulse and a first reflected pulse when an upper surface of the liquid is at a first level, and to generate a second delay between a second initial pulse and a second reflected pulse when the upper surface of the liquid is a second level.

3. 发明授权

US12125619B2 Self-limiting heater 有权
公开(公告)号：US12125619B2
公开(公告)日：2024-10-22
申请号：US17181527
申请日：2021-02-22
申请人： Littelfuse, Inc.
发明人： Efrem Fesshaie , Paulius Kabisius , Jianhua Chen , Rimantas Misevicius
IPC分类号： H01C7/02 , H05B3/00
CPC分类号： H01C7/021 , H05B3/0014 , H05B2203/02 , H05B2203/035
摘要： A self-limiting heater and method for building the self-limiting heater are disclosed. The self-limiting heater consists of a resistor and a PTC resistor coupled together in series with a power supply. Both resistive devices have good thermal coupling. The resistor has a minimal resistance change over changes in temperature while the resistance of the PTC resistor increases with an increase in temperature. The ohmic resistance ratio between the resistor and the PTC may be used to adjust the heater characteristics and limit the characteristic sharpness.

4. 发明申请

US20160003664A1 FLOATLESS PULSED WAVE GUIDE LIQUID LEVEL MEASUREMENT 审中-公开
标题翻译：无流量脉冲波导液位测量
公开(公告)号：US20160003664A1
公开(公告)日：2016-01-07
申请号：US14792685
申请日：2015-07-07
申请人： LITTELFUSE, INC.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： G01F23/28
CPC分类号： G01F23/284
摘要： A waveguide arrangement may include a tank defining a chamber for holding a liquid; and a pulsed waveguide (PWG) disposed at least partially within the chamber, the PWG comprising: an inner cylinder, the inner cylinder being grounded. The waveguide may also include an electrically conductive coil wrapped around the inner cylinder, wherein the pulsed waveguide is arranged to generate a first delay between a first initial pulse and a first reflected pulse when an upper surface of the liquid is at a first level, and to generate a second delay between a second initial pulse and a second reflected pulse when the upper surface of the liquid is a second level.
摘要翻译：波导布置可以包括限定用于保持液体的室的罐; 以及至少部分地设置在所述腔室内的脉冲波导管（PWG），所述PWG包括：内筒，所述内筒接地。波导还可以包括围绕内圆筒缠绕的导电线圈，其中脉冲波导布置成当液体的上表面处于第一水平时产生第一初始脉冲和第一反射脉冲之间的第一延迟，以及以在液体的上表面为第二水平时产生第二初始脉冲和第二反射脉冲之间的第二延迟。

5. 发明申请

US20210265085A1 Self-Limiting Heater 有权
公开(公告)号：US20210265085A1
公开(公告)日：2021-08-26
申请号：US17181527
申请日：2021-02-22
申请人： Littelfuse, Inc.
发明人： Efrem Fesshaie , Paulius Kabisius , Jianhua Chen , Rimantas Misevicius
IPC分类号： H01C7/02 , H05B3/00
摘要： A self-limiting heater and method for building the self-limiting heater are disclosed. The self-limiting heater consists of a resistor and a PTC resistor coupled together in series with a power supply. Both resistive devices have good thermal coupling. The resistor has a minimal resistance change over changes in temperature while the resistance of the PTC resistor increases with an increase in temperature. The ohmic resistance ratio between the resistor and the PTC may be used to adjust the heater characteristics and limit the characteristic sharpness.

6. 发明授权

US11054377B2 Pulsed wave guide liquid quality measurement 有权
公开(公告)号：US11054377B2
公开(公告)日：2021-07-06
申请号：US16364742
申请日：2019-03-26
申请人： Littelfuse, Inc.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： G01F23/284 , G01N27/02
摘要： A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.

7. 发明申请

US20200172049A1 RADAR-BASED OCCUPANCY DETECTOR FOR AUTOMOBILES 审中-公开
公开(公告)号：US20200172049A1
公开(公告)日：2020-06-04
申请号：US16686171
申请日：2019-11-17
申请人： LITTELFUSE, INC.
发明人： Juergen Scheele , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： B60R22/48 , B60R16/03 , G01S13/04
摘要： A radar-based occupancy detection system that includes a seatbelt buckle disposed adjacent a seat of a vehicle and a radar module disposed within the seatbelt buckle, the radar module including an antenna, a radio frequency (RF) transmitter, a RF receiver, and a processor, the antenna configured to broadcast a RF signal generated by the RF transmitter toward the seat, the processor configured to derive signal information from output received from the receiver and to characterize occupancy of the seat based on the signal information.

8. 发明授权

US10254240B2 Pulsed wave guide liquid quality measurement 有权
公开(公告)号：US10254240B2
公开(公告)日：2019-04-09
申请号：US14740785
申请日：2015-06-16
申请人： LITTELFUSE, INC.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： H04B3/52 , H01P3/00 , G01N27/02
摘要： A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.

9. 发明申请

US20150362447A1 PULSED WAVE GUIDE LIQUID QUALITY MEASUREMENT 审中-公开
标题翻译： PULSED WAVE GUID液体质量测量
公开(公告)号：US20150362447A1
公开(公告)日：2015-12-17
申请号：US14740785
申请日：2015-06-16
申请人： LITTELFUSE, INC.
发明人： Brian Johnson , Efrem Fesshaie , Rimantas Misevicius
IPC分类号： G01N27/02
CPC分类号： G01N27/025
摘要： A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.
摘要翻译：波导系统可以包括内芯和在具有线圈长度的导电线圈中围绕内芯缠绕的导体，其中由脉冲波导接收的电压脉冲作为具有组速度的感应波传播，组速度低于阈值速度，其中从初始电压脉冲可以检测到来自感应波的导体内产生的反射信号或行尾信号。

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