公开(公告)号：WO2004042380A2

公开(公告)日：2004-05-21

申请号：PCT/US0334540

申请日：2003-10-30

Applicant: HONEYWELL INT INC

Inventor： COLE BARRETT E ,  HIGASHI ROBERT E ,  WOOD ROLAND A

IPC: G01N33/00 ,  G01N27/00

CPC classification number: G01N33/0016

Abstract: A low power gas sensor is provided for detecting one or more gases in a gas sample. The gas sensor includes a sensor for sensing a desired gas and a heater for heating the sensor. During operation, a controller provides power to the heater to heat the sensor to an operating temperature during a first period of time. Once at the operating temperature, the controller may read the sensor to determine a measure of the detected gas in the gas sample. Once a measurement is taken, and to conserve power, the controller removes the power to the heater allowing the heater and sensor to cool to at or near the ambient temperature for a second period of time. The second to period of time may be longer than the first period of time, and in some cases, substantially longer. In some embodiments, the sensor and heater may be thermally isolated from some or all of the remainder of the gas sensor, such as the sensor substrate. This may also help reduce the amount of power that is required to heat the heater and sensor to the operating temperature. The gas sensor of the present invention may be ideally suited for battery powered and/or wireless applications.

Abstract translation: 提供了一种用于检测气体样品中的一种或多种气体的低功率气体传感器。 气体传感器包括用于感测所需气体的传感器和用于加热传感器的加热器。 在操作期间，控制器为加热器提供电力，以在第一时间段内将传感器加热到工作温度。 一旦处于工作温度，控制器可以读取传感器以确定气体样品中检测到的气体的量度。 一旦进行了测量并节省电力，控制器将去除加热器的电源，使加热器和传感器在环境温度或接近环境温度下冷却第二个时间段。 第二次到第一时间可能会比第一个时间长，在某些情况下会更长。 在一些实施例中，传感器和加热器可以与诸如传感器基板的气体传感器的其余部分的一些或全部热隔离。 这也可以帮助减少将加热器和传感器加热到工作温度所需的功率。 本发明的气体传感器可以理想地适用于电池供电和/或无线应用。

公开(公告)号：WO2004048958A3

公开(公告)日：2005-10-20

申请号：PCT/US0338146

申请日：2003-11-25

Applicant: HONEYWELL INT INC

Inventor： COLE BARRETT E ,  HIGASHI ROBERT E

IPC: G01N27/00 ,  G01N27/414 ,  G01N27/12 ,  B81B3/00 ,  C01B31/02

CPC classification number: G01N27/4146 ,  Y10S977/953

Abstract: A sensor (14) having a nanotube (15) grown on and supported by thermal bimorph structures (11, 12). The nanotube (15) rests on a heat sink (13) during sensing gas or a liquid and is moved from the heat sink when the nanotube is heated to desorb gas or liquid from it. The heatsink (13) may function as a gate along with the bimorph structures (11, 12) as the other terminals of a transistor. Current-voltage and current-gate voltage characteristics may be obtained of the nanotube as a device like a transistor. These characteristics may provide information on a gas or liquid absorbed by the nanotube.

Abstract translation: 具有生长在热双压电晶体结构（11,12）上并由其支撑的纳米管（15）的传感器（14）。 在检测气体或液体期间，纳米管（15）放置在散热器（13）上，并且当加热纳米管以从其中解吸气体或液体时，其从散热器移动。 作为晶体管的其他端子，散热器（13）可以与双压电晶片结构（11,12）一起作为栅极。 作为像晶体管的器件，可以获得电流 - 电压和电流 - 栅极电压特性。 这些特性可以提供关于纳米管吸收的气体或液体的信息。