Process & Product Quality Control » Fuit & Seeds X-ray Inspection

FRUIT & SEEDS X-RAY INSPECTION -
RIPENESS AND SPROUT
QUALITY CONTROL

The low-energy X-ray scanning of e.g. avocado fruits can be accomplished with the fruit traveling past an X-ray scanner on a conveyor belt, separated into lanes. The speed of the belt is typically about 12 m/min (limit is 27 m/min), and the inspection speed is around
1 avocado per second
for each lane or
about 4 avocados per second at 12 m/min.

X-ray technology has been used for years for fruit&seeds x-ray inspection quality control. Our new and innovative X-ray systems push the detection level to the real need – to detect what is critical for the consumer.

X-ray inspection of fruits – avocado inspection - product & process control 1

THE VALUE OF LOW-ENERGY X-RAY TECHNOLOGY:

  • reducing loss and making best use of raw materials
  • better product classification and a better product price
  • avoiding customer complaints
  • a robust, reliable, and safe inspection technology
  • hygienic design guidelines

The low-energy X-ray scanning is a prerequisite for the cost-effective applications of
ripe sorting and seed sprout sorting.

OBJECTIVE

The avocado inspection problem

The quality, price, and overall sales parameters for avocado and other fruits are related to their ripeness and damages that they may have suffered upon transport. Avocado is especially vulnerable to become overripe, a condition which may be difficult to distinguish from ripe fruits, and a condition which makes the fruit worthless.

The seed sprout problem

Expenses on care-taking of seeds with bad sprout capabilities and the cost of farm surfaces or forest land without crops are significant. Therefore, for some crops and types of seeds, the sprout capability assessment has a large value.

fruits inspections xray

SOLUTION

The low-energy X-ray scanning of e.g. avocado fruits can be accomplished with the fruit traveling past an X-ray scanner on a conveyor belt, separated into lanes. The speed of the belt is typically about 12 m/min (limit is 27 m/min), and the inspection speed is around 1 avocado per second for each lane or about 4 avocados per second at 12 m/min.

The X-ray images unveil that the ripe fruits correlate with a void development around the inner core, at the early stages of the ripe. Later, an uneven internal structure with cracks seems to correlate with the further ripe of the fruit, and this can also be correlated to a softer feel of the ripe avocado. A sorting mechanism based on the ripe condition and possible damages can be positioned immediately after the X-ray scanner. This sorting mechanism reacts on the basis of the real-time image processing and image quantification of the X-ray scanner.

For seed inspection, they typically are inspected relative to the internal structure, especially the internal density. The inspection may take place with the seeds positioned in a tray. Low density and large internal voids in the seed implies that the seed may not have the sufficient sprout capability, and therefore must be rejected. For some seeds, the proportion of not useful seeds may be substantial.

FRUIT & SEEDS X-RAY INSPECTION -
ADDITIONAL READING

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