| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c1e701ab91bc1213e5ec363a39ae44b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9b23bd315d7fc225e22e978f4849e9d5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cd524580cd697a5913ef8f9f5127132b |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2201-12753
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2201-12792
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2201-1211
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2201-12723 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N33-0006
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-27
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-274
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3504 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N33-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-27 |
| filingDate |
2011-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb2ef989e057fb3c1366ac68804f890c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d2bb47e61ac093149a75f14e118dff70 |
| publicationDate |
2012-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2012059743-A2 |
| titleOfInvention |
Temperature calibration methods and apparatus for optical absorption gas sensors, and optical absorption gas sensors thereby calibrated |
| abstract |
An optical absorption gas sensor has an LED light source and a photodiode light detector, a temperature measuring device for measuring the LED temperature and a temperature measuring device for measuring the photodiode temperature. The sensor is calibrated by measuring the response of photodiode current at zero analyte gas concentration and at a reference analyte gas concentration. From these measurement, calibration data taking into account the effect of photodiode temperature on the sensitivity of the photodiode and, independently, the effect of changes in the spectrum of light output by the LED on the light detected by the photodiode with LED temperature can be obtained. Calibration data is written to memory in the gas sensor and in operation of the gas sensor, the output is compensated for both LED and photodiode temperature. The LED and photodiode can therefore be relatively far apart and operate at significantly different temperatures allowing greater freedom of optical pathway design. There is also disclosed an elongate waveguide for an optical absorption gas sensor formed from two opposed compound parabolic collectors. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2500993-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2500993-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-202069-U1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10302609-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11644434-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2016185352-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-207289-U1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8649012-B2 |
| priorityDate |
2010-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |