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1. 发明申请

US20110316551A1 Discharge Ionization Current Detector 有权
标题翻译：放电电离电流检测器
公开(公告)号：US20110316551A1
公开(公告)日：2011-12-29
申请号：US13167629
申请日：2011-06-23
申请人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO , Katsuhisa KITANO
发明人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO , Katsuhisa KITANO
IPC分类号： G01N27/70
CPC分类号： G01N30/64 , G01N27/70
摘要： A technique for reducing an electromagnetic noise entering an electrode or a drift of a signal due to a fluctuation in the ambient temperature is provided to improve the S/N ratio of a signal originating from a component of interest. A dummy electrode 11 having the same structure as an ion-collecting electrode 10 is provided within a lower gas passage 14 at a position where dilution gas with no sample gas mixed therein flows. A differential amplifier 14 is provided to perform differential detection between output A of a current amplifier 21 connected to the ion-collecting electrode 10 and output B of a current amplifier 22 connected to the dummy electrode 11. The differential signal is free from a common mode noise or drift and hence accurately reflects the amount of the component of interest.
摘要翻译：提供了用于降低由于环境温度的波动而进入电极的电磁噪声或信号漂移的技术，以提高源自感兴趣部件的信号的S / N比。具有与离子收集电极10相同结构的虚拟电极11设置在下部气体通道14内，其中混合有样品气体的稀释气体流动。提供差分放大器14，以在连接到离子集电极10的电流放大器21的输出A与连接到虚拟电极11的电流放大器22的输出B之间执行差分检测。差分信号不存在共模噪声或漂移，从而准确反映感兴趣的组分的量。

2. 发明申请

US20110260732A1 Discharge Ionization Current Detector 有权
标题翻译：放电电离电流检测器
公开(公告)号：US20110260732A1
公开(公告)日：2011-10-27
申请号：US13092003
申请日：2011-04-21
申请人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO , Katsuhisa KITANO
发明人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO , Katsuhisa KITANO
IPC分类号： G01N27/62
CPC分类号： G01N27/70 , G01N27/62 , G01N27/68 , G01N30/64
摘要： A discharge ionization current detector using a low-frequency dielectric barrier discharge with an improved S/N ratio is provided. A current detector 20 is disposed between an excitation high-voltage power source 8 and a discharge electrode 5 to detect a discharge current flowing in pulses due to plasma generation. The detection signal of the current detector 20 and an output signal from a current amplifier 18 for amplifying an ion current are inputted into an output extraction unit 21. The output extraction unit 21 detects a precipitous-rise portion of the discharge current detection signal and generates a trigger signal, and then extracts an ion current signal for a predetermined time period from the trigger signal. This can remove an influence of a noise appearing in a signal during a time period where no plasma emission is generated, thereby improving the S/N ratio of the detection signal.
摘要翻译：提供使用具有改善的S / N比的低频电介质阻挡放电的放电电离电流检测器。电流检测器20设置在激发高压电源8和放电电极5之间，以检测由于等离子体产生而以脉冲流动的放电电流。电流检测器20的检测信号和用于放大离子电流的电流放大器18的输出信号被输入到输出提取单元21.输出提取单元21检测放电电流检测信号的急剧上升部分，并产生触发信号，然后从触发信号提取预定时间段的离子电流信号。这可以消除在不产生等离子体发射的时间段期间出现在信号中的噪声的影响，从而提高检测信号的S / N比。

3. 发明申请

US20110187379A1 Discharge Ionization Current Detector 有权
标题翻译：放电电离电流检测器
公开(公告)号：US20110187379A1
公开(公告)日：2011-08-04
申请号：US13010166
申请日：2011-01-20
申请人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO
发明人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO
IPC分类号： G01N27/70
CPC分类号： G01N27/70 , G01N27/62 , G01N27/68
摘要： A discharge ionization current detector capable of supplying plasma gas in large quantity to stabilize plasma simultaneously with lowering the sample dilution ratio to improve detection sensitivity is provided. A gas supply pipe 7 for supplying a plasma gas, which also functions as a dilution gas, is connected to a point near the connecting section of a first gas passage 3 having electrodes 4-6 for plasma generation and a second gas passage having electrodes 16 and 17 for ion detection. A first gas discharge pipe 8 is connected to the other end of the first gas passage 3, and a second gas discharge pipe 13 is connected to the other end of the second gas passage 11. Flow controllers 9 and 14 are provided in the gas discharge pipes 8 and 13, respectively. The flow rate of the gas passing through a plasma generation area and that of the gas passing through an ion current detection area can be independently regulated. Therefore, for example, it is possible to increase the former flow rate to stabilize the plasma and simultaneously decrease the latter flow rate to enhance the detection sensitivity for a low-concentration sample.
摘要翻译：提供了能够以降低样品稀释比率同时提供大量等离子体气体来稳定血浆以提高检测灵敏度的放电电离电流检测器。用于供给也用作稀释气体的等离子体气体的气体供给管7连接到具有用于等离子体产生的电极4-6的第一气体通道3的连接部分附近的点和具有电极16的第二气体通道和17用于离子检测。第一气体排出管8连接到第一气体通道3的另一端，第二气体排出管13连接到第二气体通道11的另一端。流量控制器9和14设置在气体放电管8和13。可以独立地调节通过等离子体产生区域的气体和通过离子电流检测区域的气体的流量。因此，例如，可以增加以前的流量以稳定等离子体，同时降低后一流量，从而提高低浓度样品的检测灵敏度。

4. 发明申请

US20110316552A1 Discharge Ionization Current Detector 有权
标题翻译：放电电离电流检测器
公开(公告)号：US20110316552A1
公开(公告)日：2011-12-29
申请号：US13167634
申请日：2011-06-23
申请人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO
发明人： Kei SHINADA , Shigeyoshi HORIIKE , Takahiro NISHIMOTO
IPC分类号： G01N27/62
CPC分类号： G01N27/70
摘要： A discharge ionization current detector using a low-frequency barrier discharge is provided to improve the linearity of detection sensitivity with respect to a sample introduction amount. From a lower end of a lower gas passage 10 connected to a lower end of an upper gas passage 4, a dilution gas is supplied upward against a downward flow of a plasma gas. A gas discharge passage 15 for discharging a plasma gas, the dilution gas and a sample gas is arranged between an ion-collecting electrode 11 and a bias voltage application electrode 12. The sample gas introduced through a capillary tube 16 is mixed with the plasma gas and the dilution gas due to a disturbed flow generated by collision of the plasma gas and the dilution gas. The sample component is efficiently ionized by light from the plasma without undergoing light-shielding effect of concentrated sample components. Furthermore, since an ion generation area is close to the electrodes 11 and 12, ions can quickly move the short distance due to the action of a direct current electric field. Therefore, the ions can reach the ion-collecting electrode 11 before their lifetime terminates.
摘要翻译：提供使用低频势垒放电的放电电离电流检测器，以提高检测灵敏度相对于样品引入量的线性。从连接到上部气体通道4的下端的下部气体通道10的下端，向上供给稀释气体以抵抗等离子体气体的向下流动。用于排出等离子体气体的气体排出通道15，稀释气体和样品气体布置在离子收集电极11和偏压施加电极12之间。通过毛细管16引入的样品气体与等离子体气体以及由等离子体气体和稀释气体的碰撞产生的扰动流产生的稀释气体。样品组分被来自等离子体的光有效地离子化，而不会受到浓缩样品组分的光屏蔽作用。此外，由于离子产生区域靠近电极11和12，所以由于直流电场的作用，离子能够快速地移动短距离。因此，离子可以在其寿命终止之前到达离子收集电极11。

5. 发明申请

US20110133746A1 Discharge Ionization Current Detector 审中-公开
标题翻译：放电电离电流检测器
公开(公告)号：US20110133746A1
公开(公告)日：2011-06-09
申请号：US12912646
申请日：2010-10-26
申请人： Kei SHINADA , Katsuhisa KITANO
发明人： Kei SHINADA , Katsuhisa KITANO
IPC分类号： G01N27/62
CPC分类号： G01N30/64 , G01N2030/642
摘要： To reduce the cost of a high-voltage power supply unit by reducing the discharge starting voltage for a low-frequency dielectric barrier discharge.Means for Solution: Light from light source unit 20 located externally to cylindrical tube 2 through which a plasma gas (He) flows is irradiated through the wall surface of the cylindrical tube 2 onto a plasma generation region (the region between plasma generation electrodes 6 and 7) located in gas flow path 4. The light energy excites the He molecules or the minute quantities of impurity gas molecules present in the He gas, causing photo-ionization. This causes a discharge to start, and a plasma to be formed, when a low-frequency voltage of a voltage that is less than the usual discharge starting voltage is applied across electrode 5 and electrodes 6, 7. Once the discharge starts, the discharge is sustained when the usual discharge sustaining voltage is applied across electrode 5 and electrodes 6, 7. This means that the light source unit 20 has to be on only for a short duration when discharging is started.
摘要翻译：通过降低低频电介质阻挡放电的放电起始电压来降低高压电源单元的成本。解决方案：位于外部的等离子体气体（He）流过的圆筒管2的光源单元20的光通过圆柱形管2的壁表面照射到等离子体产生区域（等离子体产生电极6和 7）位于气体流路4中。光能激发He分子或He气中存在的微量杂质气体分子，导致光电离。当在电极5和电极6,7之间施加低于通常的放电开始电压的电压的低频电压时，这样就产生放电开始和待形成的等离子体。一旦放电开始，放电当在电极5和电极6,7之间施加通常的放电维持电压时持续。这意味着当放电开始时，光源单元20必须在短时间内导通。

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