Title:
【発明の名称】空気品質測定のための装置
Document Type and Number:
Japanese Patent JP2001500618
Kind Code:
A
Abstract:
PCT No. PCT/DE97/01577 Sec. 371 Date Jun. 9, 1999 Sec. 102(e) Date Jun. 9, 1999 PCT Filed Jul. 26, 1997 PCT Pub. No. WO98/12547 PCT Pub. Date Mar. 26, 1998The present invention provides a device for measuring air quality. The device includes at least one sensor with a sensor resistance which is converted via signal processing into an output signal, the gas sensing or air content sensing device having its sensor(s) with electrical resistance that is a function of the air quality, such sensors being connected in an astable flipflop circuit arrangement with a first feedback resistor, a second feedback resistor, a capacitor and a comparator-where the first resistor is coupled between the inverting input and output of the comparator, and the second resistor is coupled between the noninverted input and the output of the comparator, and the sensor(s) is/are coupled between a reference potential and the noninverting input of the comparator. The output signal has a period which is related to the sensor resistance.
Inventors:
Thomas Weigold
Application Number:
JP51413498A
Publication Date:
January 16, 2001
Filing Date:
July 26, 1997
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
G01N27/26; G01N27/12; (IPC1-7): G01N27/26
Attorney, Agent or Firm:
Toshio Yano (3 outside)