Sensing instrument

Details Sensing instrument Sensing instrument

2011-07-19

2011-07-19

Tang, Minh N (Department: 2858)

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

C324S076410, C324S076450

Reexamination Certificate

active

07982451

ABSTRACT:
In adopting a structure in which an oscillator circuit unit and an instrument main body including a measuring unit are separately formed in a sensing instrument measuring the concentration of or determining the presence/absence of a substance to be sensed by using a quartz sensor, the present invention has an object to enable the instrument main body side to know an oscillation frequency of the connected oscillator circuit unit. A plurality of band-pass filters having pass characteristics corresponding to oscillation frequencies of the oscillator circuits respectively are provided in the instrument main body side to sort frequency signals, it is determined whether or not levels of the sorted frequency signals are equal to or higher than a threshold value, and a switching unit is controlled so as to connect a channel having a signal level equal to or higher than the threshold value to the measuring unit, and a reference frequency used in the measuring unit, for instance, is selected according to the frequency of the frequency signal corresponding to this channel.

REFERENCES:
patent: 7555952 (2009-07-01), Onishi et al.
patent: 7598723 (2009-10-01), Gaillard et al.
patent: 2008/0156097 (2008-07-01), Onishi et al.
patent: 6-241972 (1994-09-01), None
patent: 2001-083154 (2001-03-01), None
patent: 2001-304945 (2001-10-01), None
patent: 2006-184260 (2006-07-01), None

Affiliated with

Also associated with

Rating

Sensing instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sensing instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensing instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2670562