Sensing apparatus

Details Sensing apparatus Sensing apparatus

2011-03-01

2011-03-01

Tsai, Carol S (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S025000, C702S032000, C702S089000, C702S177000, C331S065000, C331S158000, C331S175000, C331S1160FE, C073S024060, C073S031050

Reexamination Certificate

active

07899633

ABSTRACT:
An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree of precision. As a specific means for solving the problem, a frequency signal from a crystal oscillator is sampled using a frequency signal from a reference clock generating part, the sampling value is outputted in a digital signal, quadrature detection is conducted with the digital signal for a frequency signal corresponding to the output signal, the rotational vector rotating at a frequency corresponding to the difference between the frequency of the frequency signal and the frequency of a sinusoidal wave used for the quadrature detection is taken out, and the variation of the frequency is detected by detecting the velocity of the rotational vector based on the respective sampling values. In addition to that, the measurement range of the variation of frequency can be widened by multiplying the above-described rotational vector by the reversely rotational vector corresponding to the velocity of the rotational vector.

REFERENCES:
patent: 4100512 (1978-07-01), Valdois et al.
patent: 4318063 (1982-03-01), Przyjemski
patent: 4453141 (1984-06-01), Rosati
patent: 4588969 (1986-05-01), Emmons
patent: 4609885 (1986-09-01), Renoult
patent: 4735081 (1988-04-01), Luoma et al.
patent: 4891611 (1990-01-01), Frerking
patent: 4949055 (1990-08-01), Leitl
patent: 5659271 (1997-08-01), Tanabe
patent: 5777525 (1998-07-01), Tanabe
patent: 5786735 (1998-07-01), Su
patent: 6707346 (2004-03-01), Tillotson et al.
patent: 7106143 (2006-09-01), Bloch et al.
patent: 2003/0058057 (2003-03-01), Schmidt
patent: 2003/0112086 (2003-06-01), Tillotson et al.
patent: 2005/0081635 (2005-04-01), Kobayashi
patent: 2006/0265176 (2006-11-01), Yamauchi et al.
patent: 2008/0060438 (2008-03-01), Shinbo et al.
patent: 3-140838 (1991-06-01), None
patent: 6-241972 (1994-09-01), None
patent: 6-308009 (1994-11-01), None
patent: 2001-000435 (2001-01-01), None
patent: 2004-279167 (2004-10-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2645010