Top PDF Apparatus and method for on-line barkhausen measurement

Apparatus and method for on line barkhausen measurement

Apparatus and method for on line barkhausen measurement

Apparatus and method for on-line barkhausen measurement Abstract Apparatus and method for measuring the Barkhausen signal of a moving magnetic film, ribbon or fiber wherein first and second stationary electromagnet coils are arranged and separated by a distance, d, along the path of movement of the film, ribbon or fiber. The first and second coils are energized in a manner to generate first and second opposing DC magnetic fields through which the moving film, ribbon or fiber passes along its path of movement. As the film, ribbon or fiber moves through the first and second opposing magnetic fields at a velocity, v, it experiences one complete cycle of magnetization in a period of time equal to d/v. A stationary third signal pick-up coil is disposed between the first and second coils to detect the Barkhausen signal from the moving film, ribbon or fiber. The pick-up coil typically is disposed midway between the first and second coils where the Barkhausen signal will be approximately maximum.
Show more

6 Read more

Method and apparatus for bone sensing

Method and apparatus for bone sensing

Method and apparatus for bone sensing Abstract The invention discloses an improved bone conduction sensor capable of use within a voice sound transmitting apparatus. The bone conduction sensor is adapted for placement in the external auditory canal of the user in a nonocclusive fashion. The bone conduction sensor has a contoured surface adapted-to fit against a wall of the external auditory canal increasing the surface area contact between the bone conduction sensor and the wall of the external auditory canal. The bone conduction sensor may also be associated with one or more contact sensors adjacent the bone conduction sensor for determining contact between the bone conduction sensor and the wall of the external auditory canal. In addition, the invention provides for the bone sensing element to be separated from the circuit portion of the bone conduction sensor so that the circuitry may be removed to the behind the ear portion of the earpiece.
Show more

14 Read more

PREDICTIVE SENSOR METHOD AND APPARATUS

PREDICTIVE SENSOR METHOD AND APPARATUS

sensor method and apparatus was developed to obtain the fastest possible response time while taking advantage of the slow sensor's more desireable characteristics.. sensors, 2) process t[r]

7 Read more

Apparatus and method for driving an ultrasonic transducer

Apparatus and method for driving an ultrasonic transducer

Apparatus and method for driving an ultrasonic transducer Abstract A method and apparatus for electronically driving an ultrasonic acoustic transducer. The transducer is operable in two modes; in a first mode, the lock-in frequency of the transducer is determined; in a second mode, the lock-in frequency determined in the first mode is used to modulate a tone-burst pulse to drive the transducer in an efficient manner. Operating in the first mode, the lock-in frequency is determined by exciting the transducer with a series of tone bursts, where each tone burst comprises an electronic pulse modulated by a tone of one frequency selected from a range of frequencies, and measuring the response of the transducer to each tone burst. In an alternative embodiment, the excitation of the transducer in the first mode is provided by a signal whose frequency is swept over a range. The response of the transducer is sampled at various times during the sweep. The lock-in frequency is chosen by examining the responses and choosing the frequency which gives the best response. Operating in the second mode, the transducer is driven with an electronic tone burst generated by modulating said an electronic pulse with a tone of the determined lock-in frequency.
Show more

17 Read more

Apparatus and method for transient thermal infrared spectrometry

Apparatus and method for transient thermal infrared spectrometry

Apparatus and method for transient thermal infrared spectrometry Abstract A method and apparatus for enabling analysis of a material (16, 42) by applying a cooling medium (20, 54) to cool a thin surface layer portion of the material and to transiently generate a temperature differential between the thin surface layer portion and the lower portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material.

18 Read more

Apparatus and method for transient thermal infrared emission spectrometry

Apparatus and method for transient thermal infrared emission spectrometry

A method and apparatus for enabling analysis of a solid material (16, 42) by applying energy from an energy source (20, 70) top a surface region of the solid material sufficient to cause[r]

19 Read more

Simulation Vacuum Preloading Method by Tri Axial Apparatus

Simulation Vacuum Preloading Method by Tri Axial Apparatus

It is very important to control any risk of instability of embankment during vacuum construction, the simulation vacuum preloading method using tri-axial apparatus is proposed to predict the behavior of soft soil improvement in the labora- tory, as well as to make this method become familiar and easier in the future. The tri-axial apparatus is used instead of the large-scale one, which has been performed by Bergado (1998) and Indaratna (2008). The tri-axial test on small size specimen can be carried out in one week compared to the large-scale apparatus takes one month for big specimen. In addition, the lateral deformation as well as the shear strength increase with time can determine accurately.
Show more

11 Read more

METHOD AND APPARATUS FOR FABRICATING

METHOD AND APPARATUS FOR FABRICATING

In even another aspect, the present invention includes a laminated composite body including a layer of metal foil strips having a plurality of gaps spacing apart adjacent strips in the l[r]

10 Read more

METHOD AND APPARATUS FOR NOP FOLDING

METHOD AND APPARATUS FOR NOP FOLDING

20 allocated. Instead, "folded" information regarding unexecuted NOP instructions is forwarded to the ROB 1 12 via folding logic 116. In this manner in-order NOP retirement is ac[r]

17 Read more

METHOD AND APPARATUS FOR COORDINATING A CHANGE IN

METHOD AND APPARATUS FOR COORDINATING A CHANGE IN

(GUI) and includes a service provider manager function or module that enables the user to switch between service providers (e.g., associated with networks 151, 152). The service provider[r]

18 Read more

METHOD AND APPARATUS FOR OPTICAL FIBER SPLICING

METHOD AND APPARATUS FOR OPTICAL FIBER SPLICING

providing an optical fiber splicing method comprising a step of sliding terminal portions of optical fibers to be spliced along a groove of V-shaped cross-section in mutually opposite di[r]

11 Read more

Method and Apparatus for Powered Descent Guidance

Method and Apparatus for Powered Descent Guidance

45 In this section we describe the main algorithm for the solution of the minimum landing error powered descent prob- lem (Problem 3). The key idea is to perform a prioritized optimiz[r]

30 Read more

Method and apparatus for measuring electrical conductivity

Method and apparatus for measuring electrical conductivity

[0074]Referring to FIGS. 15 and 16, the preferred mounting arrangement for the toroidal transformer cores 10, 12, 14 is such that their axes are mutually perpendicular. This minimises the magnetic cross coupling between the cores that would otherwise reduce the discrimination of the conductivity measurement. According to one embodiment, the mutually perpendicular mounting arrangement of the toroidal transformer cores is achieved with the loop 28 comprising two bends 48 at 45 degrees. The first, energising transformer core 10 and second, current sensing transformer core 12 are threaded onto the loop 28 such that they have a perpendicular orientation. The third, reference circuit sensing transformer core 14 is mechanically attached by any suitable means to the central portion of the loop 28 such that its axis is perpendicular to both transformer cores 10,12. In the embodiment shown in FIGS. 15 and 16, transformer core 14 is attached to loop 28 by means of a non-conducting mounting block 49 moulded or machined to securely hold the core 14 at right angles to the loop 28. A simple non-conducting clip or loop, such as a plastic ratchet tie, is used to hold this assembly tightly against loop 28.
Show more

6 Read more

Method and apparatus for measuring electrical conductivity

Method and apparatus for measuring electrical conductivity

The provision of the additional transformer core 14 in the apparatus of the present invention not only enables the measurement of conductivity in low conductivity mate[r]

42 Read more

Modular Apparatus and Method for Attaching Multiple Devices

Modular Apparatus and Method for Attaching Multiple Devices

Depending on the configuration and placement of voltage terminals VA,, contact cavity 115, and pressure reference cavity 120, modular apparatus 100 may accept a different type of pres[r]

18 Read more

Method and Apparatus for Pressure Pulse Arcjet Starting

Method and Apparatus for Pressure Pulse Arcjet Starting

a second gas generator serially connected to said second valve and parallel to said first gas generator for pro- cessing said cyclically controlled propellant flow thereby p[r]

18 Read more

Method and apparatus for pressure pulse arcjet starting

Method and apparatus for pressure pulse arcjet starting

closing said first valve and opening said second valve, thereby filling said accumulator with propellant from closing said second valve and opening said first valve[r]

18 Read more

Methodology and Method and Apparatus for Signaling With Capacity Optimized Constellations

Methodology and Method and Apparatus for Signaling With Capacity Optimized Constellations

Alter- tially the labeling, of a geometrically shaped constellation for natively, other processes that identify M-ary constellations use in a communication system having a fixed code [r]

54 Read more

Method and Apparatus for Motion Tracking of an Articulated Rigid Body

Method and Apparatus for Motion Tracking of an Articulated Rigid Body

comprises providing a starting estimate of sensor orientation quaternion measuring a local magnetic field vector and a local gravity vector and determining a measurement vec[r]

20 Read more

Method and apparatus for magnetoresistive monitoring of analytes in flow streams

Method and apparatus for magnetoresistive monitoring of analytes in flow streams

?uid stream has a magnetic property related to the concentration or distribution of analyte in the stream, the source being connected to the micro?uidic channels for ?oWing a s[r]

19 Read more

Show all 10000 documents...