Crane OCR Hardware: Cameras, Sensors and the Crane PLC
A crane OCR system looks simple from the control room: a container number appears on screen as the box is lifted. Behind it is a set of hardware mounted on the crane and tied into the crane control system. Knowing what the parts do helps terminals ask the right questions when they plan an installation. This guide covers the cameras, lighting, sensors, the crane PLC link and the software that ties them together.
Key takeaways
- Cameras and lighting capture the container sides and top as it moves.
- The crane PLC tells the system when a lift starts and ends, so each read is tied to one move.
- A local processor reads the images and sends the container ID to the terminal system.
- Good mounting, lighting and cabling matter as much as the software.
Cameras and lighting on the crane
Cameras are mounted at points where they can see the container faces as the spreader lifts or lowers it. Lighting keeps the image clear at night and in glare. The number and position of cameras depend on the crane type and the markings to be read. Our guide to crane OCR accuracy, cameras and lighting explains the choices.
The link to the crane PLC
The crane programmable logic controller (PLC) knows when the spreader is locked, when the lift starts and when the box lands. The OCR system receives these signals and uses them to start and stop image capture, so each container ID is tied to one move. The same link lets the system record which crane and which move produced the read.
Processing and the link to the terminal system
Images go to a local processor that reads the container ID, the ISO size and type code and other markings. The result is sent to the terminal operating system, as described in crane OCR integration with the TOS. Images are stored with each record for later review.
A checklist of what goes on the crane
| Item | Purpose |
|---|---|
| Cameras | Capture container sides, top and truck chassis |
| Lighting | Keep images readable at night and in glare |
| Crane PLC interface | Trigger and tie reads to each move |
| Local processor | Run OCR and send results |
| Network and power | Carry data and power safely along the crane |
Crane OCR hardware and integration from Suraj Informatics
Suraj Informatics supplies and installs crane OCR systems for quay and yard cranes, with the PLC link and integration to the terminal system. See also crane OCR features and benefits.
Crane OCR hardware: common questions
What hardware does crane OCR need?
Cameras, lighting, a link to the crane PLC, a local processor and network and power connections.
Why connect to the crane PLC?
The PLC signals when a lift starts and ends, so each container read is tied to one crane move.
Where are the cameras fitted?
On the crane at points that see the container faces during the lift. The positions depend on the crane type.
Does the system work at night?
Yes, with suitable lighting and cameras. Test in real site conditions.
Talk to our crane OCR team
Tell us about your cranes and current checking process, and we will suggest the right OCR setup.
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