公开(公告)号：US20220164304A1

公开(公告)日：2022-05-26

申请号：US17435448

申请日：2019-07-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Glen Douglas Dower ,  Stephen G. Uhlmann ,  Peter A. Seiler

IPC: G06F13/40 ,  G06F13/16

Abstract: An example of a controller for bus endpoint isolation can include an interface to couple to a bus that has respective communication channels and respective switches corresponding to endpoints of the bus, a processing resource, and a memory resource storing non-transitory instructions executable by the processing resource to select a first endpoint of the endpoints to receive a message from the interface via a first switch on a first communication channel associated with the first endpoint, cause, via a switch control mechanism, a second switch associated with a second endpoint of the bus to open to isolate the second switch; and responsive to causing the second switch to open, send the message via the first communication channel and the first switch to the first endpoint.

公开(公告)号：US11331614B2

公开(公告)日：2022-05-17

申请号：US16484163

申请日：2017-02-08

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Ning Ge ,  Paul Howard Mazurkiewicz ,  Helen A. Holder ,  Peter A. Seiler ,  Raphael Gay ,  Tom J. Searby

IPC: B01D46/00 ,  F24F11/39 ,  B01D46/44 ,  B01D46/46 ,  G01N15/06 ,  G01N15/00 ,  H05K7/20

Abstract: In an example, an air filter system includes an air filter and a thermally conductive particulate sensor (TCPS). The TCPS includes a temperature sensor to measure a first temperature of the TCPS at a first time, measure a second temperature of the TCPS at a second time, and provide the measured first temperature and the measured second temperature to a controller. The controller to determine an actual rate of temperature change based on the measured first temperature and the measured second temperature, compare the actual rate of temperature change to a target rate of temperature change, and provide a notification when a difference between the actual rate of temperature change and the target rate of temperature change is greater than an accumulation threshold indicative of a threshold amount of particulate accumulation on the TCPS.

公开(公告)号：US20200023301A1

公开(公告)日：2020-01-23

申请号：US16484163

申请日：2017-02-08

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Ning Ge ,  Paul Howard Mazurkiewicz ,  Helen A. Holder ,  Peter A. Seiler ,  Raphael Gay ,  Tom J. Searby

IPC: B01D46/44 ,  G01N15/06 ,  B01D46/46

Abstract: In an example, an air filter system includes an air filter and a thermally conductive particulate sensor (TCPS). The TCPS includes a temperature sensor to measure a first temperature of the TCPS at a first time, measure a second temperature of the TCPS at a second time, and provide the measured first temperature and the measured second temperature to a controller. The controller to determine an actual rate of temperature change based on the measured first temperature and the measured second temperature, compare the actual rate of temperature change to a target rate of temperature change, and provide a notification when a difference between the actual rate of temperature change and the target rate of temperature change is greater than an accumulation threshold indicative of a threshold amount of particulate accumulation on the TCPS.

公开(公告)号：US11768788B2

公开(公告)日：2023-09-26

申请号：US17435448

申请日：2019-07-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Glen Douglas Dower ,  Stephen G. Uhlmann ,  Peter A. Seiler

IPC: G06F13/40 ,  G06F13/16

CPC classification number: G06F13/4022 ,  G06F13/1668

Abstract: An example of a controller for bus endpoint isolation can include an interface to couple to a bus that has respective communication channels and respective switches corresponding to endpoints of the bus, a processing resource, and a memory resource storing non-transitory instructions executable by the processing resource to select a first endpoint of the endpoints to receive a message from the interface via a first switch on a first communication channel associated with the first endpoint, cause, via a switch control mechanism, a second switch associated with a second endpoint of the bus to open to isolate the second switch; and responsive to causing the second switch to open, send the message via the first communication channel and the first switch to the first endpoint.

公开(公告)号：US20200001306A1

公开(公告)日：2020-01-02

申请号：US16486134

申请日：2017-02-14

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Ning Ge ,  Paul Howard Mazurkiewicz ,  Helen A. Holder ,  Peter A. Seiler ,  Raphael Gay ,  Tom J. Searby

IPC: B03C3/155 ,  B03C3/41 ,  B03C3/68 ,  B01D46/00

Abstract: In an example, an air filter assembly includes an air filter to remove particulates from air flowing through the air filter, sense electrodes coupled to the air filter, the sense electrodes spaced apart in a direction that is transverse to a direction of a flow of the air, a sense interconnects to couple the sense electrodes to a first power source to drive a sense electrode of the sense electrodes to a sense power, charge electrodes coupled to the air filter, where the charge electrodes are spaced apart from and adjacent to the sense electrodes, and charge interconnects to couple the charge electrodes to a second power source to drive a charge electrode of the charge electrodes to a charge power different from the sense power.