Global patent index - EP 1088219 A1

EP 1088219 A1 2001-04-04 - MEASUREMENT OF HUMIDITY BY ABSORPTION OF MICROWAVES

Title (en)

MEASUREMENT OF HUMIDITY BY ABSORPTION OF MICROWAVES

Title (de)

FEUCHTEMESSUNG DURCH MIKROWELLENABSORPTION

Title (fr)

MESURE DE L'HUMIDITE PAR ABSORPTION DE MICRO-ONDES

Publication

EP 1088219 A1 (DE)

Application

EP 99927924 A

Priority

  • DE 19827241 A
  • DE 19835859 A
  • EP 9903962 W

Abstract (en)

[origin: WO9966316A1] The invention relates to a method and a device for measuring the humidity content of a flat material being measured (1) by the absorption of microwaves. The microwaves irradiate the material being measured (1) along a measuring beam chain, said chain comprising at least two measuring beams (4, 5, 6, 7), several times. Once the last measuring beam (7) has passed through, the microwaves are transferred to a detection device (11) which detects their field strength. The humidity content of the microwaves is determined from the field strength. The aim of the invention is to determine the humidity content as accurately as possible. To this end, the microwaves are linearly polarised in different directions along at least two of the measuring beams (4, 5, 6, 7). Microwave parts of other measuring beams which may have been deviated can therefore be recognised and eliminated in the respective receivers at the ends of the two measuring beams by means of their state of polarisation.

IPC 1-7 (main, further and additional classification)

G01N 22/04

IPC 8 full level (invention and additional information)

G01N 22/04 (2006.01)

CPC (invention and additional information)

G01N 22/04 (2013.01)

Citation (search report)

See references of WO 9966316A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

WO 9966316 A1 19991223; EP 1088219 A1 20010404

INPADOC legal status

2003-01-15 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020709

2002-04-10 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020226

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001207

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE ES FR GB IT