| Patent Number |
Title Of Patent |
Date Issued |
| RE30443 |
Real-time ultrasonic imaging apparatus |
December 9, 1980 |
| A real-time ultrasonic imaging system includes a display which is compensated for the non-ideal characteristics of the search beam profile. Echo responsive electrical signals are provided to a preprogrammed computing means for being processed to compensate for the characteristics of |
| D245514 |
Ultrasonic transducer probe |
August 23, 1977 |
|
| D245513 |
Ultrasonic transducer probe |
August 23, 1977 |
|
| 5287291 |
Quiet bus for the busing of analog and digital data |
February 15, 1994 |
| Test apparatus (10) performs non-destructive testing of an object (O) to determine if it has flaws or defects. An ultrasonic wave (W) is generated and directed at the object. A return wave (R) reflected by the object is received and analyzed to determine if a flaw or defect. The return w |
| 4680967 |
Ultrasonic angle test probe having at least two transducers |
July 21, 1987 |
| This invention relates to an ultrasonic angle test probe comprising at least two ultrasonic transducers for respectively generating and receiving ultrasonic waves propagating in different directions. According to the invention, in order to obtain relatively small wedge shaped coupling |
| 4646571 |
Method and apparatus for hardness measurement |
March 3, 1987 |
| This invention discloses a method and apparatus for determining the hardness of a solid workpiece. An elongated rod is excited to be mechanically resonant along its longitudinal axis and is provided at its front end with a defined contact surface of hard material (Vickers diamond). W |
| 4381676 |
Apparatus for sensing ultrasonic waves by optical means |
May 3, 1983 |
| An apparatus for sensing the acoustic energy responsive deformation of a workpiece surface by optical means, that is without physical contact with the workpiece surface, comprises the use of a laser light beam illuminating the workpiece surface portion along which the acoustic energy |
| 4373394 |
Ultrasonic test apparatus and sweep voltage generator for use therein |
February 15, 1983 |
| The results of the non-destructive testing of objects with a beam of ultrasonic energy is enhanced by generating display control signals commensurate with a precisely defined region in the test object. These region related signals may be displayed as a "gate" bar on the screen of a c |
| 4364114 |
Method and apparatus for determining the acoustic velocity of a workpiece |
December 14, 1982 |
| A method and apparatus for determining by the pulse-echo method the acoustic velocity of a workpiece of known thickness utilize measurement of the transit time of the first rear wall echo signal and that of the second rear wall echo signal. The two transit times are then processed in a |
| 4213344 |
Method and apparatus for providing dynamic focussing and beam steering in an ultrasonic apparatu |
July 22, 1980 |
| An acoustic lens having nonuniform cross sectional thickness is disposed in the path of an ultrasonic energy search beam traveling from a transducer probe to an object to be examined. In an alternative embodiment the lens has at least one contoured surface. As the lens undergoes motion i |
| 4210904 |
Method and apparatus for converting analog ultrasonic echo signals into digital form |
July 1, 1980 |
| A method and apparatus are provided for converting into digital form the analog ultrasonic echo signals received as a result of cyclically transmitted ultrasonic search signals intercepting an acoustic discontinuity in a workpiece. The ultrasonic echo signals are divided into a discr |
| 4169662 |
Method and apparatus for producing acoustic waves by laser pulses |
October 2, 1979 |
| Focussed acoustic waves are generated free of physical contact in a light absorbing workpiece by the use of laser beam means providing a coherent light beam which in a pulsed manner impinges upon the surface of the workpiece in a Fresnel zone pattern. The zoned pattern is caused in a |
| 4137778 |
Method and apparatus for producing ultrasonic waves in light absorbing surfaces of workpieces |
February 6, 1979 |
| In order to stabilize the acoustic wave amplitude in a workpiece, where such acoustic wave is generated by a laser beam pulse transmitted upon the workpiece surface, laser pulses preceding the laser pulse used for acoustic evaluation are utilized to clean the workpiece surface from c |
| 4134081 |
Clock circuit for use in pulse-echo ultrasonic defect testing |
January 9, 1979 |
| A clock circuit comprising a synchronizable voltage controlled oscillator in combination with a programmable address means, which address means is adjusted commensurate with the acoustic velocity of the workpiece, provides clock pulses from the oscillator having a stable and accurate |
| 4132117 |
Ultrasonic energy receiver probe utilizing opto-electrical sensing |
January 2, 1979 |
| A receiver probe for ultrasonic energy is described in which the surface deformation caused by compressive wave energy affects a thin gas-filled gap, its width being in the order of 10.sup.-7 meter. The gap is formed by opposing surfaces of an optical prism and an optical interference me |
| 4129041 |
Method and apparatus for receiving ultrasonic waves by optical means |
December 12, 1978 |
| Ultrasonic waves present on the surface of a workpiece are received contact-free by an optical sensing arrangement which includes a frequency stabilized single mode laser which illuminates the vibrating surface portion. Reflected light from the illuminated portion, which light is fre |
| 4121470 |
Opto-electric sensing means with predetermined directional characteristic for ultrasonic waves |
October 24, 1978 |
| For sensing the presence of an ultrasonic wave propagated within a workpiece at the surface of such workpiece, the workpiece surface is illuminated with a laser beam and opto-electric means, such as an interferometer, are used to sense the minute workpiece surface deformation caused |
| 4121469 |
Method and apparatus for producing a pulse type ultrasonic wave on a workpiece surface |
October 24, 1978 |
| A method and apparatus for producing on the surface of a workpiece an ultrasonic pulse wave without physical contact comprise the use of a laser beam illuminating a small, striplike, portion of the workpiece surface and such portion being moved with uniform motion along a linear axis ove |
| 4114455 |
Ultrasonic velocity measuring method and apparatus |
September 19, 1978 |
| In a pulse echo ultrasonic velocity measuring apparatus timing gate signals corresponding to the transit time of search signals traveling through a workpiece are generated. The quantity of fixed frequency pulses occurring during successive timing gate signals is counted and accumulated u |
| 4108165 |
Transducer probe for pulse-echo ultrasonic exploration |
August 22, 1978 |
| A pulse-echo ultrasonic transducer probe includes a substantially centrally disposed axial bore running therethrough and a radial slot extending from the bore to the periphery of its housing. A slotted cap dimensioned to rotatably fit over the top of the housing is provided with a hollow |
| 4104545 |
Pulse peak detector circuit |
August 1, 1978 |
| A pulse peak detector circuit for use in measuring the peak amplitude of a fast rise time, narrow pulse width pulse as in commonly encountered in an ultrasonic non-destructive testing instrument includes two amplifying means. A first amplifying means compensates small amplitude signals f |
| 4102205 |
Method and apparatus for ultrasonic nondestructive testing of workpieces with automatic compensa |
July 25, 1978 |
| A method and apparatus for ultrasonic nondestructive testing of workpieces include automatic compensation of echo responsive electrical signals commensurate with preprogrammed test parameters. The test parameters include at least one of the following: depth dependent correction of the |
| 4099416 |
Resolution real-time ultrasonic imaging apparatus |
July 11, 1978 |
| A real-time ultrasonic imaging system includes a display which is compensated for the non-ideal characteristics of the search beam profile. Echo responsive electrical signals are provided to a preprogrammed computing means for being processed to compensate for the characteristics of |
| 4098131 |
Method and apparatus for increasing the speed of ultrasonic pulse-echo testing |
July 4, 1978 |
| In order to increase the speed at which a workpiece is tested by the ultrasonic pulse-echo method, the dead time between individual measurement time intervals is shortened by providing a minimum predetermined time interval selected for the specific test conditions. When an echo respo |
| 4088028 |
Method and apparatus for adjusting defect signal gate in ultrasonic test circuit |
May 9, 1978 |
| In an ultrasonic pulse-echo test circuit a probe means is coupled via a liquid filled coupling path to a workpiece which undergoes motion relative to the probe means. For each search signal transmitted by the probe means the transit time of such signal is measured from the time of transm |
| 4079315 |
Method and apparatus for measuring time interval between two pulse signals |
March 14, 1978 |
| The time interval between two consecutive pulse signals, as occurring for instance in nondestructive ultrasonic pulse-echo testing, is measured by measuring with a counting frequency the width of the interval start pulse signal and the width of the interval stop pulse signal at respectiv |
| 4070917 |
Ultrasonic pulse-echo thickness and velocity measuring method |
January 31, 1978 |
| In a pulse-echo ultrasonic circuit an ultrasonic search signal is periodically transmitted into a workpiece. The ensuing pair of echo signals (entrant and rear surface reflection respectively) are fed to a timing circuit for providing a timing signal responsive to the time interval b |
| 4064742 |
Ultrasonic inspection device |
December 27, 1977 |
| A clock circuit comprising a synchronizable voltage controlled oscillator in combination with a programmable address means, which address means is adjusted commensurate with the acoustic velocity of the workpiece, provides clock pulses from the oscillator having a stable and accurate |
| 4050292 |
Method and apparatus for testing railroad wheels |
September 27, 1977 |
| An ultrasonic pulse-echo apparatus tests railroad wheels passing through a test zone by sending ultrasonic energy into the rim of the wheels. Sensing means are disposed to discern the type of wheel e.g. locomotive wheel or freight car wheel to be tested and provide a corresponding contro |
| 4050055 |
Attenuator circuit ultrasonic testing |
September 20, 1977 |
| A broad bandwidth, constant input impedance programmable attenuator circuit for use in pulse-echo ultrasonic testing is provided for attenuating an acoustic discontinuity responsive electrical signal. The attenuator circuit is programmable either by computer or manually and comprises sol |
| 4046477 |
Interferometric method and apparatus for sensing surface deformation of a workpiece subjected to |
September 6, 1977 |
| In contact-free testing a workpiece by ultrasonic energy an interferometric method and apparatus is used to sense acoustic energy by determining the deformation of a workpiece surface while such workpiece is undergoing acoustic exploration. The surface of the workpiece is illuminated by |
| 4044594 |
Ultrasonic track testing carriage |
August 30, 1977 |
| An ultrasonic track testing carriage for movement along rails in operative relationship with a test vehicle is disclosed and includes a pair of wheel frames each having guide means for following the gauge side of the rail and ultrasonic sensing means mounted in working relationship with |
| 4003244 |
Ultrasonic pulse-echo thickness measuring apparatus |
January 18, 1977 |
| An electrical circuit incorporated in a receiver circuit of an ultrasonic pulse-echo thickness and/or velocity measuring apparatus causes the entrant surface and rear wall responsive video signals to be of equal magnitude and in phase with each other. The provision of echo responsive |
| 3999422 |
Ultrasonic test method and apparatus for testing thick-walled workpieces |
December 28, 1976 |
| The invention concerns an apparatus and method for ultrasonically testing thick-walled workpieces at an increased scanning speed by the use of a plurality of ultrasonic test probes wherein the probes are selectively rendered operable. The transmit probes are temporarily inhibited from |
| 3996791 |
Ultrasonic test method and apparatus utilizing scattered signals |
December 14, 1976 |
| In a pulse-echo ultrasonic test arrangement the back reflected echo acoustic wave signal as well as the scattered longitudinal wave and scattered shear wave signals are utilized in an evaluation circuit for determining more accurately the characteristics of a defect in a workpiece. T |
| 3994154 |
Ultrasonic pulse-echo thickness and velocity measuring apparatus |
November 30, 1976 |
| In a pulse-echo ultrasonic circuit an ultrasonic search signal is periodically transmitted into a workpiece. The ensuing pair of echo signals (entrant and rear surface reflection respectively) are fed to a timing circuit for providing a timing signal responsive to the time interval b |
| 3991607 |
High resolution pulse-echo ultrasonic method and apparatus |
November 16, 1976 |
| Acoustic discontinuity responsive echo signals are compressed using special evaluating means for increasing the resolution of pulse-echo test apparatus. The acoustic discontinuity responsive echo signal undergoes mathematical convolution with a predetermined signal which latter signal |
| 3985022 |
Ultrasonic thickness measuring method and apparatus |
October 12, 1976 |
| The invention refers to an ultrasonic measuring means exhibiting improved stability and calibration adaptability. Ultrasonic energy signals are transmitted into a workpiece and echo responsive signals are received therefrom. A timing signal having a pulse width commensurate with the |
| 3969926 |
Alignment of ultrasonic transducer probe in pulse-echo testing |
July 20, 1976 |
| This invention refers to an ultrasonic pulse-echo nondestructive test method and apparatus for causing the axis of an ultrasonic energy search beam path transmitted from an ultrasonic transducer probe to a workpiece to be maintained normal to an irregularly contoured workpiece entrant |
| 3955404 |
Resonant sensing device |
May 11, 1976 |
| The invention refers to a measuring circuit for determining the properties of a workpiece, particularly hardness, using the contact impedance method in which a probe resonating at an ultrasonic frequency provided with a workpiece engaging tip is utilized. The measuring circuit uses digit |
| 3942361 |
Arrangement for testing thick-walled specimens by the ultrasonic pulse-echo method |
March 9, 1976 |
| In an ultrasonic pulse-echo test arrangement which is particularly suited for testing heavy-walled workpieces, a plurality of transducer probes are used. Two or more transmitting transducer probes are arranged so that each probe transmits its sound beam to a respective test zone, the zon |
| 3942358 |
Method and apparatus for adjusting defect gate in ultrasonic pulse-echo testing |
March 9, 1976 |
| The present invention refers to a method of ultrasonic testing a workpiece by the pulse-echo technique and an apparatus therefor. An initial portion of a workpiece to be tested is conveyed past an array of electroacoustic transducer probes. The transit time through the workpiece of the |
