BS EN 16018:2011 pdf download – Non-destructive testing — Terminology — Terms used in ultrasonic testing with phased arrays
This European Standard defines terms used inultrasonic testing with phased arrays.
Terms relating to sound
beams,generated by a transducer，that deviatefrom the direction of the main beam
parasitic replications of the main beam caused byspatial undersampling (pitch between elementscompared to wavelength)
3Terms relating to test equipment
piezo-electric plate divided into several elements
smallest part of the array acting as a transducerNOTESee Figure 11.
arrangement of the array
distribution of all the elements in an array
linear array1D linear array
array of elements arranged in a single straight lineNOTESee Figure 1.
arrayofring-shapedelementsarrangedconcentrically where the major transmitting axis isaxial
NOTESee Figure 2.
annular sectorial array
annular array with the rings divided into sectorsNOTESee Figure 3 and Figure 9.
array arranged on a complete or partial circle,where the major transmitting axis is radial
NOTESee Figure 4 and Figure 7.
encircling array typically used for the inspection oftubes from the inside
encircling array typically used for the inspection oftubes from the outside
dual array probe
probe with separate arrays for transmitting andreceiving
NOTESee Figure 5.
group ofindividualarray elementsoperatedsimultaneously with adapted delay laws
two-dimensional array of equal or non-equal sizedelements
See Figure 3.
2D matrix array
rectangular matrix array
NOTESee Figure 6 and Figure 8.
distance between the same edges or centres of twoadjacent elements
NOTE For linear arrays see Figure 10.
space between elementsgap between elements
distance between two adjacent elementsNOTEFor linear arrays see Figure 10.
group of active elements when transmitting and/orreceiving
active aperture made of only one element
primary axis of an array
main axis for beam-steering parallel to the width ofthe elements
NOTESee Figure 8.
secondary axis of an array
axis perpendicular to the primary axisNOTESee Figure 8.
reference point on the wedge
coordinates of the point on the wedge which isused to position a defined point of the array
sensitivity curve of an array
representation of the sensitivity of each elementsuccessively connected to the same channel, whenusing a flat reflector much larger than the apertureof the array
natural refracted beam angle
angle between the refracted beam axis and the
normal to the interface without electronic beam-steering
NOTESee Figure 11.
angle between the beam axis and the projection ofthe normal to the test object surface on thedeflection plane
NOTESee Figure 12 a).
range of steering anglesNOTESee Figure 12 a).
angle between the traces of the deflection planeand the plane of natural refraction on the surface ofthe test object
NOTESee Figure 12 b).