Measuring and testing – Instrument proving or calibrating – Speed – velocity – or acceleration
Reexamination Certificate
2008-01-15
2008-01-15
Raevis, Robert (Department: 2856)
Measuring and testing
Instrument proving or calibrating
Speed, velocity, or acceleration
Reexamination Certificate
active
11491277
ABSTRACT:
A metal rod guide (30) supports a metal rod (1) that can be inclined at an arbitrary angle, the support is instantaneously released to produce a free fall state, and during the release period, a first end surface (2) of the metal rod is impacted by a projectile (3) at the same angle as the metal rod, generating an elastic wave pulse in the metal rod. A direct current acceleration sensor (23) detects an acceleration arising when the elastic wave pulse reflects at the other end surface (22) of the metal rod. A strain gauge (25) provided on a side surface of the metal rod and/or a laser interferometer (24) measure strain and end surface motion and the measured values are processed to obtain a frequency response of the direct current acceleration sensor and measure frequency characteristics of the direct current acceleration sensor.
REFERENCES:
patent: 3830091 (1974-08-01), Sinsky
patent: 5000030 (1991-03-01), Umeda et al.
patent: 5042302 (1991-08-01), Soelkner
patent: 5952554 (1999-09-01), Umeda
patent: 6286359 (2001-09-01), Umeda
patent: 7076991 (2006-07-01), Umeda
patent: 3-109165 (1991-11-01), None
patent: 04-093653 (1992-03-01), None
patent: 5-273232 (1993-10-01), None
patent: 09-053912 (1997-02-01), None
patent: 09-222484 (1997-08-01), None
patent: 09-2511031 (1997-09-01), None
U.S. Appl. No. 10/509,628, filed Apr. 6, 2005, Umeda.
U.S. Appl. No. 10/554,620, filed Oct. 27, 2005, Umeda.
U.S. Appl. No. 11/491,277, filed Jul. 24, 2006, Umeda.
Endevco Model 2271A/AM20 Piezoelectric Accelerometer, Product Brochure, May 13, 2003, 2 pages.
Hidetaka Imai, Umeda Akira, Investigation about a highly precise acceleration speed instrumentation system (from 1994 to 1996), ministry of International Trade and Industry Agency of Industrial Science of Technology, a collection of special memoirs, 1997. 113-117 pages.
Ueda Kazunaga, Umeda Akira, Investigation about Patent evaluation method of an acceleration meter with Davis stick (the first report, frequency characteristics valuation law of an accelertion meter with a strain gauge), Japan Society of Mechanical Engineers Collected papers C, 57 533, 143-147 pages.
PTO 06-349 English language translation of Umeda, Japanese Kokai Patent Application No. Hei 1[1992]-93653.
PTO 06-3084 English language translation of Umeda et al., “Frequency Characteristics of Accelerometers Measured by Impact in Low Frequencies”.
Umeda Akira, Ueda Kazunaga, About frequency characteristics evaluation method by bombardment of an acceleration speed sensor in a low acceleration domain, Japan Society of Mechanical Engineers, No. 4 design engineering/a system category lecture, Lecture collected papers, 477-482 pages.
National Institute of Advanced Industrial Science and Technology
Raevis Robert
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