公开(公告)号：WO2019142100A1

公开(公告)日：2019-07-25

申请号：PCT/IB2019/050319

申请日：2019-01-15

Applicant: GAS MEASUREMENT INSTRUMENTS, LTD.

Inventor： MATHIESON, Fraser ,  GLENDINNING, Andrew ,  MASSIE, Crawford ,  DICK, Nigel

IPC: G01M3/04 ,  G01N33/00 ,  G01S19/01 ,  H04W4/38

Abstract: A system for underground gas detection is provided. The system includes at least one wireless sensor positionable within a respective bar hole. Each wireless sensor includes a sensor configured to detect gas, a sensor processing circuitry configured to generate sensor data based on the detected gas and cause transmission of the sensor data to a probe node, and a housing having a gas permeable inlet and outlet configured to allows gas to pass through the housing and prevent water from passing through the housing. The sensor being positioned within the housing. The system includes a probe node configured for wireless communication with at least one of the at least one wireless sensor. The probe node includes node processing circuitry configured to: receive sensor data from the at least one of the at least one wireless sensor, process the sensor data, and trigger at least one action if the sensor data meets a predefined threshold.

公开(公告)号：EP3308144B1

公开(公告)日：2019-05-15

申请号：EP16760537.7

申请日：2016-07-27

Applicant: Gas Measurement Instruments Ltd.

Inventor： MASSIE, Crawford ,  MATHIESON, Fraser ,  GLENDINNING, Andrew

IPC: G01N21/3504 ,  G01J1/16 ,  G01N21/31

公开(公告)号：EP3308144A1

公开(公告)日：2018-04-18

申请号：EP16760537.7

申请日：2016-07-27

Applicant: Gas Measurement Instruments Ltd.

Inventor： MASSIE, Crawford ,  MATHIESON, Fraser ,  GLENDINNING, Andrew

IPC: G01N21/3504 ,  G01J1/16 ,  G01N21/31

CPC classification number: G01N21/3518 ,  G01J1/1626 ,  G01J2001/161 ,  G01N21/314 ,  G01N21/3504 ,  G01N33/0059 ,  G01N2021/3166 ,  G01N2201/1215

Abstract: A detector has a sensor responsive to a first wavelength, a sensor responsive to a second wavelength, and a sensor for collecting reference readings. A gas sample is analysed to obtain readings corresponding to the first wavelength, the second wavelength and a reference. A first absorption figure is calculated using the first reading and the reference reading, and a second absorption figure using the second reading and the reference reading. A lineariser function is applied to the first and second absorption figures to calculate first and second concentration figures. The sensor for each wavelength is calibrated for detecting the first gas such that the data collected at each wavelength gives the same reading when only the first gas is present. The ratio of the first concentration figure to the second concentration figure is used to identify whether only the first gas is present.