公开(公告)号：US20160202167A1

公开(公告)日：2016-07-14

申请号：US14911363

申请日：2014-06-27

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masayuki MOTOMURA ,  Takeshi SUGIYAMA ,  Kazunari KOKUBO

IPC: G01N15/06 ,  F01N11/00 ,  F01N9/00

CPC classification number: G01N15/0656 ,  F01N9/002 ,  F01N11/00 ,  G01N2015/0046

Abstract: A particulate detection system (1) for detecting the quantity of particulates S in a gas under measurement EG includes first heater energization means S2 to S3, current convergence determination means S4 to S5, S7 to S8, second heater energization means S6, and detection start means S10. S2 to S3 performs low-temperature energization of heater (78) for a predetermined period after operation of ion source (11) is started by ion source drive circuit (210) such that gaseous discharge current Id becomes equal to a predetermined target current It. S4 to S5, S7 to S8 determines, after elapse of the predetermined period, whether or not Id has converged to an allowable range IR. When S4 to S5 determines that Id has not yet converged, S6 performs high-temperature energization of the heater (78) until Id converges. Then, S10 starts detection of particulates S using signal Is detected by a detection circuit (230).

Abstract translation: 用于检测被测气体中的微粒S量的微粒检测系统（1）包括第一加热器通电装置S2至S3，电流收敛确定装置S4至S5，S7至S8，第二加热器通电装置S6和检测开始 意味着S10。 在离子源（11）由离子源驱动电路（210）启动使得气体放电电流Id变为等于预定目标电流It之后，S2至S3进行加热器（78）的低温通电预定时间。 从S4到S5，S7至S8确定在经过预定时段之后，Id是否已经收敛到容许范围IR。 当S4至S5确定Id尚未收敛时，S6执行加热器（78）的高温通电，直到Id收敛。 然后，S10使用由检测电路（230）检测出的信号Is开始检测微粒S.

公开(公告)号：US20200312607A1

公开(公告)日：2020-10-01

申请号：US16828450

申请日：2020-03-24

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yuji MATSUMOTO ,  Kazunari KOKUBO

IPC: H01J37/24 ,  H02M3/335

Abstract: A discharge control apparatus for controlling a flyback power supply circuit which includes a transformer having a primary coil and a secondary coil and performing voltage conversion, and a driver for controlling energization of the primary coil. The power supply circuit supplies electric energy to a plasma reactor. The discharge control apparatus calculates, based on primary current flowing through the primary coil and primary voltage generated in the primary coil, supply energy supplied to the primary coil and regeneration energy which is a portion of the supply energy not used for the discharge in the plasma reactor. The discharge control apparatus controls the power supply circuit based on the calculated supply energy and the calculated regeneration energy. Also disclosed is a method for controlling the flyback power supply circuit.

公开(公告)号：US20160195463A1

公开(公告)日：2016-07-07

申请号：US14911095

申请日：2014-07-07

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masayuki MOTOMURA ,  Takeshi SUGIYAMA ,  Kazunari KOKUBO

IPC: G01N15/06

CPC classification number: G01N15/0656 ,  G01N2015/0046

Abstract: A particulate detection system (1) for detecting the quantity of particulates S in a gas under measurement EG, including a detection section (10), a drive circuit (210, 240), and a control section (230, 202). The detection section (10) has an ion source (11) and a particulate electrification section (12). The drive circuit (210) includes an ion source drive circuit (210) for performing constant current control. The control section (230, 202) includes current convergence determination means S2-S3, S5-S6, and detection start means S8 for starting detection of the quantity of the particulates S using the signal Is, detected by a detection circuit (230), after the gaseous discharge current Id has converged to an allowable range IR.

Abstract translation: 一种用于检测在测量EG气体中的微粒量S的微粒检测系统（1），包括检测部分（10），驱动电路（210,240）和控制部分（230,202）。 检测部（10）具有离子源（11）和微粒通电部（12）。 驱动电路（210）包括用于进行恒定电流控制的离子源驱动电路（210）。 控制部（230,202）包括电流会聚判定装置S2-S3，S5-S6，以及检测开始装置S8，用于利用检测电路（230）检测到的信号Is开始检测微粒量S， 在气体放电电流Id已经收敛到容许范围IR之后。

公开(公告)号：US20170160234A1

公开(公告)日：2017-06-08

申请号：US15371961

申请日：2016-12-07

Applicant: NGK Spark Plug Co., LTD.

Inventor： Isao SUZUKI ,  Kazunari KOKUBO

IPC: G01N27/68 ,  G01M15/10

CPC classification number: G01N27/68 ,  G01M15/102 ,  G01N15/0656 ,  G01N2015/0046

Abstract: Particulate measurement processing executed by a sensor control section of a particulate measurement system includes a step of stopping voltage conversion by a first isolation transformer and a second isolation transformer, a step of obtaining correction information B, and a step of correcting ion current A through use of the correction information B. The correction information B reflects improper current generated through particulates, etc. (soot or the like) adhering to a particulate sensor. The ion current A (signal current Iesc) is corrected through use of the correction information B, and the amount of soot S is computed through use of the corrected ion current A′. As a result, it is possible to measure the amount of the soot S (the amount of particulates) while suppressing the influence of the improper current.

公开(公告)号：US20140326873A1

公开(公告)日：2014-11-06

申请号：US14266982

申请日：2014-05-01

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kazunari KOKUBO

IPC: H01J49/02

CPC classification number: H01J49/022 ,  F01N2560/05 ,  G01N27/70 ,  H01T19/04 ,  H01T23/00

Abstract: A fine particle measurement system including a primary-side power supply circuit connected to a primary side of an isolation transformer, a control circuit configured to control the primary-side power supply circuit, a first current measurement circuit configured to transmit to the control circuit a first signal indicating a first current that flows from a trapping unit toward a secondary-side reference potential line, and a second current measurement circuit configured to transmit to the control circuit a second signal indicating a second current corresponding to the amount of ions that are not trapped by the trapping unit. The control circuit adjusts the electrical power supplied to the ion generating unit based on the first current and measures the amount of the fine particles in the gas based on the second current. Further, the first current measurement circuit includes an isolation amplifier and amplifies the first signal via the isolation amplifier and transmits the first signal to the control circuit.

Abstract translation: 一种微粒测量系统，包括连接到隔离变压器的初级侧的初级侧电源电路，被配置为控制初级侧电源电路的控制电路，被配置为向控制电路a发送的第一电流测量电路 第一信号指示从捕获单元向次级侧基准电位线流动的第一电流;以及第二电流测量电路，其被配置为向控制电路发送指示与不是离子的离子量相对应的第二电流的第二信号 被捕获单元捕获。 控制电路基于第一电流来调整供给到离子产生单元的电力，并且基于第二电流测量气体中的微粒的量。 此外，第一电流测量电路包括隔离放大器，并且经由隔离放大器放大第一信号，并将第一信号发送到控制电路。