CHALLENGE

The bubble test depends on who is standing over the tank.

Fuel tanks, castings, valves and pressure vessels are submerged and watched for a stream of bubbles. The stream is small, the water is moving, the lighting is poor, and the operator has been watching tanks since the shift began. A leak at the back of the part is missed.

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How it shows up on the line

Field leaks on tested partsParts that passed the tank come back leaking, with no way to say whether the leak was there.
Hidden facesThe operator sees the top and the front; the back and the underside bubble unseen.
No evidenceA passed part has no record beyond a tick on a sheet.
Slow and inconsistentThe watch time is whatever the operator gives it, which changes through the shift.

Why it is still there

The usual fixes have usually been tried.

Eyes over moving waterSmall bubbles against ripples and reflections are a hard target even for an alert person.
Pressure decay aloneA decay test gives a number but not where the leak is, and small leaks hide in temperature drift.
Fixed-rule camerasBubbles look like reflections to a simple threshold; the inspection has to know the difference.

How DESSAR removes it

Camera over every faceCameras placed so each face of the submerged part is in view, with lighting chosen for bubbles.
Call the leak as it happensA bubble stream is detected and located, the part is marked NG and the location is shown.
Fixed watch timeEvery part gets the same dwell, and the decision is logged with the image sequence.
Tie in to the tankStart, stop and the verdict exchanged with the tank's own controls.

The system that removes it

Built as a product, fitted to your part and your line. Open it to run the demo and take the datasheet.

The Bubble Leak Detection operator screenBubble Leak Detectionoperator screen
DSR-BLT

Bubble Leak Detection

Watches a submerged part and calls the leak as it happens, instead of leaving it to an operator over the tank.

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What we need from you to start

The part drawing, the tank dimensions, the test pressure and dwell, and a video of the tank as it runs today. We come back with what is detectable, at what rate, and what it takes. Sensor selection, capability figures and programme detail are issued against your own application.

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