公开(公告)号：US20240151595A1

公开(公告)日：2024-05-09

申请号：US18413477

申请日：2024-01-16

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugal Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  F01D17/08 ,  G01K1/14 ,  G01P5/12

CPC classification number: G01K13/02 ,  F01D17/085 ,  G01K1/14 ,  G01P5/12 ,  G01K13/024

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

公开(公告)号：US20180238746A1

公开(公告)日：2018-08-23

申请号：US15551152

申请日：2016-02-15

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugar Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  G01P5/12 ,  G01K1/14 ,  F01D17/08

CPC classification number: G01K13/02 ,  F01D17/085 ,  G01K1/14 ,  G01K2013/024 ,  G01P5/12

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

公开(公告)号：US11874179B2

公开(公告)日：2024-01-16

申请号：US17201496

申请日：2021-03-15

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugal Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  G01P5/12 ,  F01D17/08 ,  G01K1/14 ,  G01K13/024

CPC classification number: G01K13/02 ,  F01D17/085 ,  G01K1/14 ,  G01P5/12 ,  G01K13/024

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

公开(公告)号：US10914667B2

公开(公告)日：2021-02-09

申请号：US16664637

申请日：2019-10-25

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods and systems for reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into multiple wicks used for transporting separate portions of an aerosol sample flow, with the wicks extending from a wick stand on a first end to a flow joiner on a second end, combining particles from the separate portions of the aerosol sample flow into a single aerosol stream within the flow joiner prior to transporting the combined aerosol sample stream into a particle detection chamber within the CPC, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water in a collection reservoir, and after receiving a signal corresponding to the excess volume of water, draining the excess volume of water from the collection reservoir. Other methods, systems, and apparatuses are disclosed.

公开(公告)号：US10948364B2

公开(公告)日：2021-03-16

申请号：US15551152

申请日：2016-02-15

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugal Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  G01P5/12 ,  F01D17/08 ,  G01K1/14

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

公开(公告)号：US10520414B2

公开(公告)日：2019-12-31

申请号：US15552396

申请日：2016-02-23

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

公开(公告)号：US10488314B2

公开(公告)日：2019-11-26

申请号：US15552396

申请日：2016-02-23

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

公开(公告)号：US20210199513A1

公开(公告)日：2021-07-01

申请号：US17201496

申请日：2021-03-15

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugal Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  G01P5/12 ,  F01D17/08 ,  G01K1/14

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

公开(公告)号：US20200256782A1

公开(公告)日：2020-08-13

申请号：US16754703

申请日：2018-10-08

Applicant: TSI Incorporated

Inventor： Peter Perkins Hairston ,  Frederick R. Quant

IPC: G01N15/14

Abstract: Various embodiments include methods and systems to calibrate a gain of a photodetector. A method can include providing, by a reference light source, first light to a reference photodetector, determining, by controller circuitry, whether a first value from the reference photodetector produced in response to the first light is within a range of acceptable reference photodetector values, in response to determining the first value is within the range of acceptable reference photodetector values, providing, by the reference light source, second light to a measurement photodetector, determining, by the controller circuitry, whether a second value from the measurement photodetector produced in response to the second light is within a range of acceptable measurement photodetector values, and in response to determining the second value is not within the range of acceptable measurement photodetector values, adjusting a gain of the measurement photodetector.

公开(公告)号：US20190234811A9

公开(公告)日：2019-08-01

申请号：US15551152

申请日：2016-02-15

Applicant: TSI, Incorporated

Inventor： Frederick R. Quant ,  Jugar Agarwal ,  Siva Iyer

IPC: G01K13/02 ,  G01P5/12 ,  G01K1/14 ,  F01D17/08

CPC classification number: G01K13/02 ,  F01D17/085 ,  G01K1/14 ,  G01K2013/024 ,  G01P5/12

Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.