公开(公告)号：US10075911B2

公开(公告)日：2018-09-11

申请号：US14128788

申请日：2012-06-13

Applicant: Niels Aakvaag ,  Knut Sandven

Inventor： Niels Aakvaag ,  Knut Sandven

IPC: G08B21/00 ,  H04W52/02 ,  H04W4/38 ,  H04W4/70 ,  H04W84/18

CPC classification number: H04W52/0209 ,  H04W4/38 ,  H04W4/70 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/142

Abstract: A wireless sensor network comprises at least one sensor unit which comprises a sensor for sensing a parameter and at least one interrogating node. The interrogating node is arranged to transmit an interrogation message periodically to said sensor unit and to receive a reply message from said sensor unit. The sensor unit is arranged to transmit said reply message after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply message before the end of the deliberate delay.

公开(公告)号：US20210164895A1

公开(公告)日：2021-06-03

申请号：US17119472

申请日：2020-12-11

Applicant: GasSecure AS

Inventor： Håkon SAGBERG ,  Britta GRENNBERG FISMEN ,  Kari Anne HESTNES BAKKE ,  Jon TSCHUDI ,  Ib-Rune JOHANSEN ,  Knut Baeroe SANDVEN

IPC: G01N21/3504 ,  G01N21/31 ,  G01R27/26

Abstract: A gas sensor for measuring concentration of a predetermined gas includes a light source (2) arranged to emit pulses of light, a measurement volume (10), a detector (4) arranged to receive light that has passed through the measurement volume (10), and an adaptable filter (6) disposed between the light source (2) and the detector (4). The gas sensor has a measurement state in which it passes at least one wavelength band which is absorbed by the gas and a reference state in which said wavelength band is attenuated relative to the measurement state. A controller is connected to each of the light source, the detector and the adaptable filter to change the adaptable filter between one of said measurement state and said reference state to the other at least once during a gas sensor operation period.

公开(公告)号：US10508988B2

公开(公告)日：2019-12-17

申请号：US15926574

申请日：2018-03-20

Applicant: GasSecure AS

Inventor： Håkon Sagberg

IPC: G01N21/31 ,  G01N21/3504 ,  G01N21/59 ,  G01N33/00

Abstract: A gas sensor is used for determining a concentration of a predetermined gas in a measurement volume. The gas sensor comprises a light source and a detector arranged to receive light that has passed through the measurement volume. During a first measurement period, the detector is used to make a first measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The first measurement is compared to a predetermined threshold value. If the threshold is crossed, during a second measurement period the detector is used to make a second measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The concentration of said gas in said measurement volume is calculated using the first and/or second measurement.

公开(公告)号：US10481080B2

公开(公告)日：2019-11-19

申请号：US15737243

申请日：2016-06-16

Applicant: GASSECURE AS

Inventor： Lars Borgen ,  Britta Fismen ,  Thor Christian Hobæk ,  Håkon Sagberg

IPC: G01N21/15 ,  G01N21/3504

Abstract: A gas sensing apparatus (48) comprises a gas sensor arranged to use light to sense presence of a gas; an optical element (12, 40) arranged so that said light impinges thereon; and a thermoelectric heat pump (2, 24) having a cold side (6, 36) and a hot side (8, 34). The thermoelectric heat pump (2, 24) is configured to transfer heat energy from said cold side (6, 36) to said hot side (8, 34) in response to a supply of electrical energy provided to the thermoelectric heat pump (2, 24). The hot side (8, 34) of the thermoelectric heat pump (2, 24) is in thermal contact with the optical element (12, 40).

公开(公告)号：US09952143B2

公开(公告)日：2018-04-24

申请号：US14362945

申请日：2012-12-05

Applicant: GasSecure AS

Inventor： Håkon Sagberg

IPC: G01N21/35 ,  G01N21/59 ,  G01N33/00 ,  G01N21/3504 ,  G01N21/31

CPC classification number: G01N21/3504 ,  G01N21/59 ,  G01N33/0062 ,  G01N2021/3188 ,  G01N2033/0068

Abstract: A gas sensor is used for determining a concentration of a predetermined gas in a measurement volume. The gas sensor comprises a light source and a detector arranged to receive light that has passed through the measurement volume. During a first measurement period, the detector is used to make a first measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The first measurement is compared to a predetermined threshold value. If the threshold is crossed, during a second measurement period the detector is used to make a second measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The concentration of said gas in said measurement volume is calculated using the first and/or second measurement.

公开(公告)号：US20140232555A1

公开(公告)日：2014-08-21

申请号：US14128788

申请日：2012-06-13

Applicant: GasSecure AS

Inventor： Niels Aakvaag ,  Knut Sandven

IPC: H04W52/02 ,  H04W4/00

CPC classification number: H04W52/0209 ,  H04W4/38 ,  H04W4/70 ,  H04W84/18 ,  Y02D70/00

Abstract: A wireless sensor network comprises at least one sensor unit which comprises a sensor for sensing a parameter and at least one interrogating node. The interrogating node is arranged to transmit an interrogation message periodically to said sensor unit and to receive a reply message from said sensor unit. The sensor unit is arranged to transmit said reply message after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply message before the end of the deliberate delay.

Abstract translation: 无线传感器网络包括至少一个传感器单元，其包括用于感测参数的传感器和至少一个询问节点。 询问节点被布置成周期性地向所述传感器单元发送询问消息，并从所述传感器单元接收回复消息。 传感器单元被布置成在预定的故意延迟之后发送所述应答消息，除非传感器单元确定已经满足报警条件，在这种情况下，传感器单元被布置成在故意延迟结束之前发送所述回复消息。

公开(公告)号：US08373568B2

公开(公告)日：2013-02-12

申请号：US12668479

申请日：2008-07-16

Applicant: Sigurd T. Moe ,  Niels Peter Ostbo ,  Knut Sandven ,  Hakon Sagberg

Inventor： Sigurd T. Moe ,  Niels Peter Ostbo ,  Knut Sandven ,  Hakon Sagberg

IPC: G08B17/10 ,  G01N7/00

CPC classification number: G01N33/0032 ,  G01N21/3504 ,  G01N2021/1704 ,  G08B21/16

Abstract: To achieve gas detection in a precise and reliable way, but at the same time without consuming too much energy, a gas detection system is provided which generally comprises a pair of two different gas detectors. The first detector (DLP) is active continuously and sense substantially for an unspecific change in the local gas mixture. As a reaction upon the change, the second detector (DHP) of the pair is activated. This detector (DHP) performs the determination of the concentration of a specific gas or several specific gasses. The second detector (DHP) may be of a type which consumes more power, but will be active for a short period of time before returning to an inactive state where only the first detector (DLP) is active. The first detector (DLP) however is of a type using little power.

Abstract translation: 为了以精确可靠的方式实现气体检测，同时不消耗太多的能量，提供了一种通常包括一对两种不同气体检测器的气体检测系统。 第一检测器（DLP）连续有效并且基本上感测到局部气体混合物中的非特异性变化。 作为变化的反应，该对的第二检测器（DHP）被激活。 该检测器（DHP）可以确定特定气体或几种特定气体的浓度。 第二检测器（DHP）可以是消耗更多功率的类型，但是在返回到只有第一检测器（DLP）有效的无效状态之前，它将在短时间段内被激活。 然而，第一检测器（DLP）是使用少量功率的类型。