Session: 21-01: Poster Session

Paper Number: 98284

98284 - Ultrasonic Evaluation of Paint Canisters 

Canisters are used to store liquids such as oil, paint, liquified glue, and so on. When a customer buys a canister of liquid, they expect the contents of it to be in pristine condition. The contents of the cannister may become defective due to errors in manufacture, transportation, or unfavourable climatic conditions, and the unsuspecting client discovers this after breaking the seal. The vendor will not take the defective goods back after the seal has been broken. To determine that the products in the canisters are in usable condition, one such process that can be used is non-destructive testing using ultrasonics. In this method, a transducer is used, which has a transmitter and a receiver. The transmitter is placed on one side of the cannister, and the receiver is placed exactly opposite on the other side. Using this, the time taken for the waves to propagate from emitter to receiver (time of flight) is noted and compared with that of standard values. This process allows us to determine whether the contents of the canisters are in good condition without the need to break the seal.

The measurements are carried out at three different locations say, top, middle and bottom of the canister and time of flight (TOF) values are recorded. If the content inside the canister is in a liquid state, the TOF is observed about 46±0.6 micro seconds. Poor weather conditions, mis manufacturing, or mishandling in transportation. So, if the canister's contents have any air pockets, then the contents react and solidifies. For this case the TOF is about 35±0.5 micro seconds only. The difference of 9 micro seconds was observed when the content of the canister changed from liquid sate to solid. This allows us to predict whether the contents inside the canister are in pristine condition or not, without opening the seal.

Presenting Author: Venkata Sushma Chinta Chaitanya Bharathi Institute of Technology