摘要:
The apparatus and method for moving a sensor over a workpiece includes a sensor, and an actuating member. The sensor, such as a non-destructive test sensor, is carried by the actuating member, and the actuating member is at least partially disposed within a housing. The actuating member is adapted for automated movement in one direction, and the housing may be configured to be grasped by an operator and manually moved in another direction. As such, the sensor may automatically move in one direction with respect to the workpiece without manual intervention, and manually move in another direction, such that the sensor is moved by the combination of automated and manual movement. In addition, the actuating member may have at least two substantially parallel arms extending from near the sensor, which permits the sensor to slide along the workpiece while maintaining a substantially normal relationship to a surface of the workpiece.
摘要:
An eddy current probe and associated method of inspecting a structure are provided that are capable of generating a two-dimensional image of the structure, generally in real time. The eddy current probe includes an eddy current probe array having a plurality of first and second coils that cross one another to define a plurality of sensing elements. The eddy current probe array may also include a plurality of magnetically permeable core elements located coincident with respective sensing elements and at least partially encircled by respective first and second coils. The eddy current probe may also include an alternating current source electrically connected to the first coils and sense electronics for sensing current induced in the second coils. In operation, the current sensed in the second coils represents at least one characteristic of the structure, such as the electrical conductivity of the structure.
摘要:
Techniques for detecting defects in the proximity of a hole of a laminate structure include inserting a generally cylindrical body portion into a hole such that a first coil of wire will reside in a plane substantially parallel to a first electrically conductive layer of the laminate material. A magnetic field produced by the first coil of wire will produce eddy-currents in the conductive layer in the plane of the first conductive layer, but damaged laminate materials will fail to produce similar eddy-currents. As the differences in eddy-currents between damages and undamaged laminate layers can be measured, damage to such laminate materials can be determined.
摘要:
An ultrasonic probe performs non-destructive inspection of a corner radius of a part. According to one embodiment, an ultrasonic probe includes an ultrasonic sensor array, and a shoe for holding the sensor array and moving the sensor array along the radius of the part. The shoe includes means for adjusting the sensor array so all ultrasonic beams from the sensor array have the same water path distance to a center of the radius, and for adjusting the sensor array so that all beams pass through the center of the radius.
摘要:
An ultrasonic probe performs non-destructive inspection of a corner radius of a part. According to one embodiment, an ultrasonic probe includes an ultrasonic sensor array, and a shoe for holding the sensor array and moving the sensor array along the radius of the part. The shoe includes means for adjusting the sensor array so all ultrasonic beams from the sensor array have the same water path distance to a center of the radius, and for adjusting the sensor array so that all beams pass through the center of the radius.
摘要:
Improved apparatus, systems, and methods for inspecting a structure are provided that use a pedestal robot mounted on a rail system, a probe extension coupler, and an inspection probe capable of performing pulse echo ultrasonic inspection. A probe may also include sled appendages and an axial braking system to inspect over holes and off edges. A probe may also include an ultrasonic pulse echo transducer array for high rate inspection; the transducer array may be mounted in a bubbler shoe for individually coupling each of the transducers in the array. A rail system may also include an optical encoder for providing location information for the robot and axial braking system. A probe extension coupler presses the inspection probe against the structure for adjusting to changes in surface contours.
摘要:
An ultrasonic transducer device is pressed against the front surface of a structure, emits an ultrasonic pulse into the structure, and detects an echo profile from the structure. An indicator is activated if the echo profile includes a return pulse that at least is received from between the front surface and the back surface of the structure. An ultrasonic transducer device includes an ultrasonic transducer and a coupling element coupled to the transducer for disposition between the transducer and a surface of a structure. The coupling element serves as a delay line that allows time for quiescence in the transducer so that return pulses from shallow depths can be detected. The ultrasonic transducer is activated when multiple switches are pressed against a surface thus assuring both firm coupling and perpendicular disposition of the acoustic axis of the transducer relative to the surface.
摘要:
First and second thermal sensors measure the respective temperatures of portions of a surface of a structure such as an aircraft component. An alert signal is emitted if the temperatures of the surface portions are substantially different. An energy source causes heat flow within the structure. Subsurface flaws such as disbonded areas between composite layers and foreign materials obstruct heat flow within the structure and cause proximate surface portions to exhibit different temperatures. A non-alert signal may be emitted if the temperatures of proximate surface portions are essentially the same.
摘要:
A device for detecting hidden cracks in a structure includes a hand-held probe which is moved over the surface of the structure. The probe is connected to a computer terminal which also has connected thereto a monitor and a keyboard. Changes in the eddy currents in the underlying structure generates impedance changes in the coils of the probe. The resulting voltage values produce an image of the underlying structure and any cracks therein on the computer monitor. The system utilizes a number of procedures to compensate for liftoff problems, imbalance between coil channels, and differences in impedance reference values.
摘要:
Improved apparatus, systems, and methods for inspecting a structure are provided that use a pedestal robot mounted on a rail system, a probe extension coupler, and an inspection probe capable of performing pulse echo ultrasonic inspection. A probe may also include sled appendages and an axial braking system to inspect over holes and off edges. A probe may also include an ultrasonic pulse echo transducer array for high rate inspection; the transducer array may be mounted in a bubbler shoe for individually coupling each of the transducers in the array. A rail system may also include an optical encoder for providing location information for the robot and axial braking system. A probe extension coupler presses the inspection probe against the structure for adjusting to changes in surface contours.