公开(公告)号：US20190271662A1

公开(公告)日：2019-09-05

申请号：US16349068

申请日：2016-11-11

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Aimin SU ,  Zhongxing CAO ,  Bing CHEN ,  Feng LIANG

IPC: G01N27/70 ,  H01J61/35 ,  H01J61/16

Abstract: Embodiments relate generally to an ultraviolet lamp (100) for use with a photoionization detector comprising a sealed tube (102) configured to contain at least one gas; a coating (120) applied to the inner surface (110) of the sealed tube (102); and a crystal window (112) attached to the sealed tube (102), configured to allow transmittance of ultraviolet (UV) light generated within the sealed tube (102). Additional embodiments include a method of forming an ultraviolet lamp (100) for use with a photoionization detector, the method comprising applying at least one layer of a coating (120) onto an inner surface (110) of a sealed tube (102); sealing a crystal window (112) onto the sealed tube (102); filling the sealed tube (102) with at least one gas; sealing the sealed tube (102) containing the at least one gas; generating ultraviolet radiation using the at least one gas within the sealed tube (102); and directing the generated ultraviolet radiation through the crystal window (112) toward a sample gas in the photoionization detector.

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

IPC: G01N33/00 ,  G01N27/66

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.

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

IPC: H01J61/56 ,  G01N33/00

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.

公开(公告)号：US20200333292A1

公开(公告)日：2020-10-22

申请号：US16763334

申请日：2017-11-20

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Sam SU ,  Bing CHEN ,  Junhui ZHANG ,  Feng LIANG

IPC: G01N27/62

Abstract: Embodiments relate generally to systems and methods for a low profile PID typically comprising a flexible substrate; two or more electrodes containing an array of holes; a spacer with one or more holes; and two or more contacts corresponding to the electrodes. Typically, the unfolded flexible substrate defines a plane, and the electrodes are disposed on the flexible substrate such that when the flexible substrate is folded, one electrode is located on a top plane and another electrode is located on a bottom plane and the spacer is disposed between the electrodes to form an ionization chamber for use with a UV radiation source.

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

IPC: G01N33/00 ,  G01N27/66

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.