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Class 73/772 - Plural sensed signal system


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein more than one signal is sensed and
No. of patents: 35
Last issue date: 03/11/2008


NumberTitleIssue Date
7340961Fixture and method for measuring elongation
A fixture for measuring the elongation of a specimen includes a base. The base carries a fixture portion, and the fixture portion is provided with a surface adapted to receive a portion of the specimen. ...
03/11/2008
7334485System, method and computer-readable medium for locating physical phenomena
A method, system and computer product for detecting the location of a deformation of a structure includes baselining a defined energy transmitting characteristic for each of the plurality of laterally adjacent conductors attached to the structure. Each of the plural...
02/26/2008
7309988Methods and systems for reducing acoustic noise in a magnetic resonance imaging (MRI) system
A method for reducing acoustic noise in a medical imaging system is described. The method includes attaching a material to an area affected by an acoustic noise generated by the imaging system. The material is configured to bend upon receiving an electrical signal.
12/18/2007
7231832System and method for detecting cracks and their location
A system and method are provided for detecting cracks and their location in a structure. A circuit coupled to a structure has capacitive strain sensors coupled sequentially and in parallel to one another. When excited by a variable magnetic field, the circuit has a ...
06/19/2007
7185545Instrumentation and method for monitoring change in electric potential to detect crack growth
Instrumentation for monitoring crack growth using a change in electric potential across a starter crack as the crack propagates is disclosed. The instrumentation includes a specimen of a material to be analyzed for crack growth propagation having a surface with a st...
03/06/2007
7032459Structures including network and topology for identifying, locating and quantifying physical phenomena
A method and system for detecting, locating and quantifying a physical phenomena such as strain or a deformation in a structure. A plurality of laterally adjacent conductors may each include a plurality of segments. Each segment is constructed to exhibit a unit valu...
04/25/2006
6986286Composite material and method of controlling damage thereto and damage sensor
A composite material has a laminated structure of fiber-reinforced resin layers and films of a shape-memory alloy. A predetermined strain has been applied to each film. A damage sensor has a film of an alloy of nickel and titanium. An electric circuit is bonded to t...
01/17/2006
6965836Method and apparatus for two dimensional surface property analysis based on boundary measurement
An apparatus and method for determining properties of a conductive film is disclosed. A plurality of probe locations selected around a periphery of the conductive film define a plurality of measurement lines between each probe location and all other probe locations....
11/15/2005
6334363Device for measuring pressure points to be applied by a compressive orthotic device
The device comprises a rigid former reproducing the volume of a portion of the body and suitable for receiving the compressive orthosis. The former (10) incorporates a plurality of sensors (22) distributed over various points of the former and configured ...
01/01/2002
6318184Beam strain gauge
Disclosed is a beam strain gauge to measure strain in a material which incorporates the theory of beam mechanics and the use of a full Wheatstone bridge circuit. In all cases the beam or beams used are not attached directly to the material to be measured,...
11/20/2001
6173618Ore pass level and blockage locator device
A method of, and apparatus for, detecting level and blockages in an ore pass or other near-vertical shaft is described. The level and blockage detector includes a flexible metal strip in which a plurality of strain gages have been located, spaced apart fr...
01/16/2001
5962792Beam strain gauge
Disclosed is a beam strain gauge to measure strain in a material which incorporates the theory of beam mechanics and the use of a full Wheatstone bridge circuit. In all cases the beam or beams used are not attached directly to the material to be measured,...
10/05/1999
5922967Method and apparatus for estimating loads imposed on structural body
A plurality of strain gages are installed on a structural body at n positions thereon. A concentrated reference load is applied to the structural body at one of the n positions and strains developed in the structural body at the respective n positions are...
07/13/1999
5856621Elastic modulus determination of composite material
An elastic modulus of an element of a material including fibers in a selected direction is determined as follows. First, a parallel elastic modulus, an orthogonal elastic modulus and fiber orientation of the material are stored. The elastic modulus of the...
01/05/1999
5022272Locally compensated deformation sensor
A deformation sensing device, and related method, for measuring overall deformation of a structural member subject to deformation by an actuator. The device includes a first sensor located in a region of influence of the actuator and a second sensor locat...
06/11/1991
4813320Method and apparatus for detecting a sheet strip material misfeed condition
A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provid...
03/21/1989
4566336Navigational aid alerting system
The present invention relates to a device for scanning a plurality of sensor units. The device is comprised of at least one remote data acquisition unit which sequentially scans a plurality of sensor units and which stores data corresponding to the stress...
01/28/1986
4503710Crack detection by electrical resistance
Early detection of cracks in structural members subject to stress is accomplished before cracks traverse the member by (a) affixing multiple liquid impermeable enclosures to the material to be monitored such that a crack forming in the monitored material will ...
03/12/1985
4464937Extensometer readout circuit
An extensometer readout circuit conditions a strain information signal, representing strain of a specimen being tested, in such a way that yield point measurements and final elongation measurements of such specimen may be concurrently obtained. The strain...
08/14/1984
4432234Determination of plastic anisotropy in sheet material
This invention relates to a method of determining the average plastic strain ratio (r) of sheet material of known density. This is effected by computation utilizing an empirical relationship existing for the material between r and an elastic property ther...
02/21/1984
4418577Process for measuring and analyzing potentials of piezo-electric origin generated by a rigid member made of an organic material
This process involves detecting piezo-electric potentials which are characteristic of a mechanical strain exerted on a long rigid member made of organic material. For this purpose, the potentials at two points spaced apart on this member are measured by m...
12/06/1983
4309907Load monitor with selective sensor connection
A load monitor for a reciprocating machine having a selective sensor connection for monitoring the total load or the individual load on each machine support member. A sensor is mounted on each one of a pluralityof support members. The sensors are connecte...
01/12/1982
4283955Method of and measuring apparatus for determining the standard tensile yield point under load conditions
A method of and apparatus for the determination of the standard tensile yield point in which the extension of a test body is monitored, comprises determining in the course of continuous extension within the elastic limit, the ratio of the instantaneous ex...
08/18/1981
4190776Multipoint measuring device
A multipoint measuring device comprising a matrix of transducers of the measured quantity and switching elements, the columns of said matrix being formed by serially connected switching elements and each transducer having one of its terminals connected to...
02/26/1980
4138898System for continuously monitoring compression and tension loads on force carrying member
A system for continuously monitoring both compressive and tension loads on a force carrying member. The system includes a transducer having a pair of physically aligned piezoelectric elements which each are adapted to sense changes in stresses in the load...
02/13/1979
4129033System for determining the level of heat treatment
The level of heat treatment of metal strip in a process line is determined by first strain gauge producing a voltage proportional to longitudinal strip tension; selective means deflecting the strip in a lateral direction without materially effecting tensi...
12/12/1978
4116050Press load meter
A press load meter according to the present invention employs strain gauges as stress detectors. Outputs of the stress detectors are analogously processed until they are amplified and the amplified signals are digitally processed in a multiplexed form wit...
09/26/1978
4048850Mechanism for gauging the catch within a trawl net
The present invention is related to a mechanism for guaging the expansion of a trawl net in correspondence with the number of fish caught within the trawl. The mechanism includes sensors adapted to be fastened to the masks of the trawl net in order to sen...
09/20/1977
4033182Method for measuring biaxial stress in a body subjected to stress inducing loads
A method for measuring stress in test articles including the steps of obtaining for a calibrating specimen a series of transit time differentials between the second wave echo for a longitudinal wave and the first wave echo for each of a pair of shear wave...
07/05/1977
4023406Tightening system with torque-time control
The invention disclosed herein relates to a tightening system including a wrench for applying torque to a fastener system. Associated with the wrench is a control system including measuring means for developing a first signal representative of the torque ...
05/17/1977
4009463Acoustic emission monitoring system
Methods and apparatus for identifying the source location of acoustic emissions generated within or on an acoustically conductive medium segregated into a plurality of quadrilateral monitoring zones. A plurality of acoustic receivers are communicably coup...
02/22/1977
3982419Apparatus for and method of determining rotational and linear stiffness
A meter for determining stiffness or torque gradient including, in one embodiment, a deflectable coupling connected between an output shaft and a power input shaft, sensing means for developing two separate series of signals representative of the displace...
09/28/1976
3979948Apparatus for determining the dynamic complex hardness of resilient roll coverings
Apparatus for determining the dynamic complex hardness of resilient roll coverings including a portable housing for positioning directly on the resilient roll covering to be tested. The portable housing includes an adjustable probe coupled to force and di...
09/14/1976
3969930Testing viscoelastic solids
An apparatus and method for testing viscoelastic solids, such as tire cord. The apparatus includes: a holding means, a pretension means, a displacement generator, and a mechanical-electrical transforming means. The holding means holds the material in a pr...
07/20/1976
3948091Apparatus for determining the properties of metallic materials
The apparatus includes a machine for subjecting a test-piece of superplastic material to a tensile test using a mobile member entraining one end of the test-piece and exerting traction on the test-piece. The mobile member is subjected to successive displa...
04/06/1976
 
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