Industrial vision integration across the UK sales@oxfordvisionsystems.co.uk 01865 416657
Inspection systems

Presence and absence detection

Presence and absence detection answers a simple production question with engineered reliability: is every required feature there, in the right place, before the product moves on?

Application-led engineering

A vision system engineered around your process.

Good performance depends on controlling product position, reflections, background contrast and acceptable variation. We design those conditions into the station.

We start with representative products, known defects, acceptable variation, line speed and the required response. That evidence determines the field of view, resolution, optics, processing and mechanical design.

Optical designCamera, lens, light and background
Line integrationPLC, tracking, reject and HMI
Acceptance testingAgreed products and defect samples
Cameras and lights above metal components held on a conveyor. Complete system scope Optics, software, controls and mechanical integration.
What it can inspect

Typical presence / absence checks.

Every item below is subject to application proof using the actual product, presentation and production conditions.

Caps, pumps, lids, seals and closures

Configured against agreed examples, limits and the required line response.

Labels, leaflets, inserts and tamper features

Configured against agreed examples, limits and the required line response.

Fasteners, clips, seals and assembly parts

Configured against agreed examples, limits and the required line response.

Product in pocket, tray, carton or fixture

Configured against agreed examples, limits and the required line response.

Correct number of visible components

Configured against agreed examples, limits and the required line response.

Missing or incomplete kit contents

Configured against agreed examples, limits and the required line response.

Production value

Make the inspection part of the process.

Detection is only useful when the result is delivered to the right control, operator or quality record at the right time.

  • Catch incomplete products before packing or dispatch
  • Reduce dependence on repetitive manual checking
  • Link inspection results to reject, stop or alarm logic
  • Adapt inspection zones and tolerances by recipe
Capture to action

One coordinated inspection workflow.

1

Capture

Trigger a stable image using controlled lighting, suitable optics and repeatable product presentation.

2

Decide

Apply proven rules, measurements or trained models with product-specific acceptance limits.

3

Act

Reject, divert, stop, alarm, guide automation or pass the result to production data systems.

Questions, answered

Vision inspection FAQs

Can vision distinguish a missing part from a misplaced part?

Usually, yes. Inspection tools can check both presence and the allowed position, provided the feature is visible and product presentation is controlled.

What happens when a part is missing?

The system can signal a reject device, divert route, machine stop or operator alarm according to the agreed controls philosophy.

Can one camera check several features?

Often it can, but resolution, viewing angle and lighting must support every feature. Where they do not, a second view is more dependable.

Start with the product and defect

Let’s prove the inspection before you commit.

Send us samples, images, line-speed information and the defects you need to detect. We’ll recommend the right next step.