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公开(公告)号：US20230408472A1
公开(公告)日：2023-12-21
申请号：US18241107
申请日：2023-08-31
Applicant: Honeywell International Inc.
Inventor： Chuang HUANG , Tengfei ZHANG , Bing CHEN , Feng LIANG
CPC classification number: G01N33/0026 , G01N27/66 , G01N33/0029
Abstract: Methods and systems for detecting and limiting the water in a photoionization detector are provided. The method may include powering off a lamp configured to ionize particles of air. The method may also include monitoring a signal from the photoionization detector. The signal may be monitored based on a current between a signal electrode and a bias electrode. In an instance the signal is above a signal threshold, the method may also include electrolyzing one or more particles of water present in the photoionization detector by closing a leakage switch in order to allow current to flow through the bias electrode and the signal electrode. In an instance the signal is below the signal threshold, the method may include powering on the lamp to begin photoionization detection. Corresponding systems are also provided.
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公开(公告)号：US20240318949A1
公开(公告)日：2024-09-26
申请号：US18597283
申请日：2024-03-06
Applicant: HONEYWELL INTERNATIONAL INC.
Inventor： Fan YANG , Yu HU , Houyong WANG , Wu CHEN , Tengfei ZHANG
CPC classification number: G01B7/18 , G01B7/22 , G01B7/24 , G08B21/182
Abstract: Methods, apparatuses and systems for a sensing deformation in a surface are disclosed herein. An example device may include a first sensor configured to mechanically couple to a first point and a second point on a surface. The first point and the second point may be located across an opening of a groove on the surface. An electrical property of the first sensor may be configured to change in response to a variation in the distance between the first point and the second point.
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公开(公告)号：US20210003542A1
公开(公告)日：2021-01-07
申请号：US16916287
申请日：2020-06-30
Applicant: HONEYWELL INTERNATIONAL INC.
Inventor： Chuang HUANG , Tengfei ZHANG , Bing CHEN , Feng LIANG
Abstract: Methods and systems for detecting and limiting the water in a photoionization detector are provided. The method may include powering off a lamp configured to ionize particles of air. The method may also include monitoring a signal from the photoionization detector. The signal may be monitored based on a current between a signal electrode and a bias electrode. In an instance the signal is above a signal threshold, the method may also include electrolyzing one or more particles of water present in the photoionization detector by closing a leakage switch in order to allow current to flow through the bias electrode and the signal electrode. In an instance the signal is below the signal threshold, the method may include powering on the lamp to begin photoionization detection. Corresponding systems are also provided.
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4.发明申请公开(公告)号：US20200373147A1
公开(公告)日：2020-11-26
申请号：US16881712
申请日：2020-05-22
Applicant: HONEYWELL INTERNATIONAL INC.
Inventor： Chuang HUANG , Tengfei ZHANG , Bing CHEN , Feng LIANG
Abstract: Methods, apparatuses, and systems for providing an alternating current (AC) voltage supply for a photoionization detector lamp from a direct current (DC) voltage source are provided. An example apparatus may include a DC voltage to DC voltage (DC/DC) converter circuitry, and a feedback circuitry that is electronically coupled to the DC/DC converter circuitry and converts a reference AC voltage to a feedback DC voltage for the DC/DC converter circuitry. In some examples, the feedback circuitry may be electronically coupled to a DC voltage to AC voltage (DC/AC) converting circuitry to obtain the reference AC voltage.
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