Beam path length katika ultrasonic testing ni nini?

Beam path is the distance the ultrasonic wave travels from the probe to the reflector. For angle beam: beam path = thickness / cos(angle). For the full V-path (skip): beam path = 2 × thickness / cos(angle).

Skip distance ni nini?

Skip distance is the surface distance between the probe entry point and where the beam reflects off the back wall. Full skip = 2 × thickness × tan(angle). Half skip = thickness × tan(angle). Used for weld inspection positioning.

Near field length ni nini?

Near field (Fresnel zone) N = D²f/(4v) where D = probe diameter, f = frequency, v = velocity. Within the near field, the beam has uneven pressure distribution. Inspections should be done beyond N for reliable results.

Angle ya probe ina athari gani kwa ukaguzi?

Common angles: 0° for thickness measurement, 45° for detecting vertical flaws in welds, 60° for general weld inspection (most common), 70° for thin materials and near-surface flaws. Angle refers to refracted shear wave angle in the test material.

Kwa nini kuchagua frequency ipi kwa mtihani wa ultrasonic?

Frequency ya juu = azimio bora lakini kupenya kidogo. 1-2 MHz kwa taka na tarakimu mbaya. 2-5 MHz kwa ukaguzi wa chuma kwa ujumla. 5-10 MHz kwa vifaa nyembamba na azimio la juu. 10-25 MHz kwa kipimo cha usahihi.

Zana ya Uhandisi Isiyolipisha

Kipitia cha Uhesabuji wa Ultrasonic

Hesabu njia ya beam, skip distance, urefu wa near field, na wavelength kwa mtihani wa ultrasonic NDT. Kumbukumbu ya kasi ya nyenzo iliyojumuishwa.

NDT CalculatorBeam PathNear Field

Matokeo ya UT Calculation

Beam Path (njia kamili ya V)

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Skip Distance (kamili)

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Half Skip Distance

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Urefu wa Near Field N

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Wavelength λ

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Velocity Used

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Nyenzo / Probe

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Min. Detectable Flaw

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Beam Path & Skip Distance

Urefu wa Near Field

Wavelength

Material Velocity Reference

Material	V_L (m/s)	V_S (m/s)	ρ (kg/m³)

Mfano wa Vitendo

Mfano — angle beam 60° kwenye chuma cha kaboni 25mm

V_shear = 3250 m/s, t = 25 mm, θ = 60°

Half skip = 25 × tan(60°) = 25 × 1.732 = 43.3 mm

Full skip = 2 × 43.3 = 86.6 mm

Beam path = 2 × 25 / cos(60°) = 50 / 0.5 = 100 mm

N = 20² × 4×10⁶ / (4 × 3250) = 1600000/13000 = 123 mm

λ = 3250 / (4×10⁶) × 1000 = 0.81 mm

UT Calculator — Beam Path, Near Field & Wavelength | Vibromera

Published by Nikolai Shelkovenko on Febuari 15, 2026 Aprili 5, 2026

Matokeo ya UT Calculation

Beam Path & Skip Distance

Urefu wa Near Field

Wavelength

Material Velocity Reference

Mfano wa Vitendo

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