公开(公告)号：WO1994001873A1

公开(公告)日：1994-01-20

申请号：PCT/US1993006443

申请日：1993-07-06

Applicant: GAZTECH INTERNATIONAL CORPORATION

Inventor： GAZTECH INTERNATIONAL CORPORATION ,  WONG, Jacob, Y.

IPC: G21G04/00

CPC classification number: G01J3/10 ,  G01J3/108 ,  G01J5/522

Abstract: A radiation source (10) is presented that exhibits an improved efficiency of converting input energy into a quasi-blackbody output beam (16). A wavelength selective element (17) can be included to transmit one or more narrow bands of this radiation for use in spectroscopy. The intensity of the output beam can be varied quickly, thereby decreasing measurement times and enabling synchronous detection techniques to be implemented at reasonable frequencies. A feedback mechanism can be integrated into this device to enable accurate control of the blackbody temperature. This radiation source can be manufactured by conventional integrated circuit manufacturing techniques, thereby producing an inexpensive quasi-blackbody source of accurately and repeatably controlled performance.

Abstract translation: 呈现出将输入能量转换成准黑体输出光束（16）的改进效率的辐射源（10）。 可以包括波长选择元件（17）以传输该辐射的一个或多个窄带以用于光谱学。 输出光束的强度可以快速变化，从而减少测量时间，并能够以合理的频率实现同步检测技术。 可以将反馈机构集成到该装置中，以便能够准确控制黑体温度。 该辐射源可以通过传统的集成电路制造技术制造，从而产生准确且可重复控制的性能的便宜的准黑体源。

公开(公告)号：WO1993013401A1

公开(公告)日：1993-07-08

申请号：PCT/US1992011350

申请日：1992-12-30

Applicant: GAZTECH INTERNATIONAL CORPORATION

Inventor： GAZTECH INTERNATIONAL CORPORATION ,  WONG, Jacob, Y.

IPC: G01N01/00

CPC classification number: G01N1/2258 ,  G01N21/0332 ,  G01N21/05 ,  G01N21/3504 ,  G01N33/0011 ,  G01N33/0016 ,  G01N33/0031 ,  G01N2001/2261 ,  G01N2021/0321 ,  G01N2021/0385 ,  G01N2021/052 ,  G01N2021/158 ,  G01N2021/8585 ,  G01N2201/0228 ,  G01N2201/066 ,  G08B17/117 ,  G08B29/20

Abstract: A gas sample chamber (10) for use in a gas analyzer consists of an elongated hollow tube (21) having an inwardly-facing specularly-reflective surface (22) that permits the tube to function also as a light pipe for conducting radiation from a source (12) to a detector (14) through the sample gas. A number of apertures (24) in the wall of the elongated hollow tube permit the sample gas to enter and exit. Particles of smoke and dust of a size greater than 0.1 micron are kept out of the chamber by use of a semi-permeable membrane (28) that spans the apertures in the hollow tube. Condensation of the sample gas components is prevented by heating the sample chamber electrically to a temperature above the dew point of the component of concern. In one embodiment, more than one detector (40, 42, 44) are spaced around the periphery of the elongated hollow tube adjacent one end of it. In another embodiment, more than one detector (56, 58, 60) are spaced along the length of the elongated hollow tube.

Abstract translation: 用于气体分析仪的气体样品室（10）由具有向内的镜面反射表面（22）的细长的中空管（21）组成，该中空管（21）允许管也用作用于传导辐射的光管 源（12）通过样品气体传送到检测器（14）。 在细长的中空管的壁中的许多孔（24）允许样品气体进出。 通过使用跨越中空管中的孔的半透膜（28）将尺寸大于0.1微米的烟雾和灰尘颗粒保持在室外。 通过将样品室电加热到高于所关注部件的露点的温度来防止样品气体组分的冷凝。 在一个实施例中，多于一个的检测器（40,42,44）围绕其一端的细长中空管的周边间隔开。 在另一个实施例中，多于一个的检测器（56,58,60）沿着细长的中空管的长度间隔开。

公开(公告)号：WO1993011418A1

公开(公告)日：1993-06-10

申请号：PCT/US1991008822

申请日：1991-11-25

Applicant: GAZTECH INTERNATIONAL CORPORATION

Inventor： GAZTECH INTERNATIONAL CORPORATION ,  WONG, Jacob, Y.

IPC: G01N01/00

CPC classification number: G01N21/0303 ,  G01J2001/161 ,  G01J2001/182 ,  G01N1/2258 ,  G01N21/0332 ,  G01N21/05 ,  G01N21/255 ,  G01N21/314 ,  G01N21/3504 ,  G01N2001/2261 ,  G01N2021/0321 ,  G01N2021/0385 ,  G01N2021/052 ,  G01N2201/0228 ,  G01N2201/06186 ,  G01N2201/0696 ,  G08B17/117 ,  G08B29/20

Abstract: A gas sample chamber (10) for use in a gas analyzer consists of an elongated hollow tube (21) having an inwardly-facing specularly-reflective surface (22) that permits the tube to function also as a light pipe for conducting radiation from a source (20) to a detector (16) through the sample gas. A number of apertures (24) in the wall of the elongated hollow tube permit the sample gas to enter and exit. Particles of smoke and dust of a size greater than 0.1 micron are kept out of the chamber by use of a semi-permeable membrane (28) that spans the apertures in the hollow tube. Condensation of the sample gas components is prevented by heating the sample chamber electrically to a temperature above the dew point of the component of concern.

Abstract translation: 用于气体分析仪的气体样品室（10）由具有向内的镜面反射表面（22）的细长的中空管（21）组成，该中空管（21）允许管也用作用于传导辐射的光管 源（20）通过样品气体传送到检测器（16）。 在细长的中空管的壁中的许多孔（24）允许样品气体进出。 通过使用跨越中空管中的孔的半透膜（28）将尺寸大于0.1微米的烟雾和灰尘颗粒保持在室外。 通过将样品室电加热到高于所关注部件的露点的温度来防止样品气体组分的冷凝。

公开(公告)号：WO1995006926A1

公开(公告)日：1995-03-09

申请号：PCT/US1993008158

申请日：1993-08-30

Applicant: GAZTECH INTERNATIONAL CORPORATION

Inventor： GAZTECH INTERNATIONAL CORPORATION ,  WONG, Jacob, Y.

IPC: G08B17/10

CPC classification number: G08B29/26 ,  G08B17/117

Abstract: The fire detector includes a carbon dioxide sensor (6) and a microcomputer (2). When the rate of increase of the concentration of carbon dioxide at the sensor (6) exceeds a threshold, an alarm is produced. The threshold is set at one of three possible levels by the microcomputer (2) in response to the state of the atmosphere at the sensor (6) as determined by the microcomputer (2) based on several variables that are derived from the sensed concentration of carbon dioxide. The derived variables include the average concentration of carbon dioxide, the average rate of change of carbon dioxide concentration, the monotonicity of the increase or decrease of the carbon dioxide concentration and the range of concentrations sensed in each cycle of operation. The threshold setting is determined every ten seconds. In this way, the setting of the rate threshold is responsive to variations in the carbon dioxide level at the sensor (6) that are caused by entities other than a fire, such as the presence or absence of people in a closed room.

Abstract translation: 火灾探测器包括二氧化碳传感器（6）和微型计算机（2）。 当传感器（6）中二氧化碳浓度的增加速度超过阈值时，产生报警。 基于由微计算机（2）确定的响应于传感器（6）的气氛的状态，由微计算机（2）将阈值设置为三个可能的水平之一，基于从感测的浓度 二氧化碳。 衍生变量包括二氧化碳的平均浓度，二氧化碳浓度的平均变化率，二氧化碳浓度的增加或减少的单调性以及在每个操作周期中感测到的浓度范围。 阈值设置每10秒钟确定一次。 以这种方式，速率阈值的设置响应于由火焰以外的实体引起的传感器（6）处的二氧化碳水平的变化，例如在闭合的房间中存在或不存在人。

公开(公告)号：WO1994018546A1

公开(公告)日：1994-08-18

申请号：PCT/US1993006722

申请日：1993-07-16

Applicant: GAZTECH INTERNATIONAL CORPORATION

Inventor： GAZTECH INTERNATIONAL CORPORATION ,  WONG, Jacob, Y.

IPC: G01N21/61

CPC classification number: G01N21/3518 ,  G01N21/031 ,  G01N21/0332 ,  G01N21/15 ,  G01N21/3504 ,  G01N21/61 ,  G01N2021/0314 ,  G01N2021/0385 ,  G01N2021/158 ,  G01N2021/8585 ,  G01N2201/0228 ,  G08B17/117 ,  G08B29/20

Abstract: The improved sample chamber includes an elongated hollow tube (12) closed at one end (14) and having specularly-reflective inwardly facing surfaces (16). A source (26) of radiation and a detector (28) of radiation are mounted side by side in the open end of the hollow tube, both facing the closed end. A plurality of filtering apertures (20) are formed in the tube (12), and each aperture is covered by a sheet (22) of a semipermeable membrane that serves to prevent airborne particles larger than a predetermined size from entering the chamber while not interfering with the free diffusion of the gas to be measured into and out of the chamber. The use of an elongated hollow tube that is closed at one end results in no loss in the efficiency with which the radiation is conducted from the source to the detector while decreasing the external length of the chamber by 50 percent.

Abstract translation: 改进的样品室包括在一端（14）处封闭并具有镜面反射向内的表面（16）的细长的中空管（12）。 辐射源（26）和辐射检测器（28）并排安装在中空管的开口端，两者面向封闭端。 在管（12）中形成多个过滤孔（20），并且每个孔被半透膜的片（22）覆盖，其用于防止大于预定尺寸的空气中的颗粒进入腔室而不干扰 使被测量气体自由扩散进入和离开室。 使用在一端封闭的细长的中空管导致辐射从源向检测器传导的效率没有损失，同时将室的外部长度减小了50％。