Unmanned Weighbridge Components: Hardware and Software
An unmanned weighbridge weighs trucks and records the result without an operator in the weighbridge cabin. It can do that only because several pieces of hardware and software work together. This guide breaks an unmanned weighbridge down into its components, explains what each one does and shows how they connect to your business systems.
Key takeaways
- An unmanned weighbridge has three layers: the weighing platform, automation devices and software.
- RFID tags or ANPR cameras identify the vehicle; barriers, traffic lights and position sensors control it.
- Cameras and a driver kiosk provide evidence and self-service.
- Weighbridge software records every weighment and shares it with ERP or dispatch systems.
The three layers of an unmanned weighbridge
It helps to think of an unmanned weighbridge in three layers. The weighing layer measures the load. The automation layer identifies the truck and guides the driver. The software layer records, checks and shares the data. If one layer is missing, the system still needs an operator.
Weighing hardware: platform, load cells and indicator
| Component | Role |
|---|---|
| Weighbridge platform | Steel or concrete deck that carries the vehicle |
| Load cells | Sensors under the platform that convert the load into an electrical signal |
| Junction box and cabling | Combine and protect the load cell signals |
| Weight indicator | Displays the weight and sends it to the software over a serial or network link |
These parts exist on every weighbridge, manned or unmanned. Automation is added around them, so an existing platform in good condition can usually be reused.
Automation devices: identification, control and evidence
| Device | What it does |
|---|---|
| RFID reader and tags | Identifies the truck or trip card automatically as it approaches |
| ANPR camera | Reads the number plate as a second check or instead of RFID |
| Boom barriers | Allow only one identified vehicle onto the platform at a time |
| Traffic lights and display | Tell the driver when to enter, stop and leave |
| Position sensors | Confirm the truck is fully on the platform before the weight is captured |
| CCTV cameras | Capture images of the vehicle and load with every weighment |
| Kiosk or intercom | Lets the driver confirm details, print a slip or call for help |
For the full sequence of how these devices work together, read how an unmanned weighbridge system works, step by step.
Software and integration
Weighbridge software controls the devices, captures the stable weight, calculates net weight from gross and tare, attaches camera images and stores everything in one record. Reports show weighments by vehicle, material, supplier or customer. Integration sends the data to ERP, SAP, dispatch or billing systems so nobody re-types it.
Learn more about the software side in what weighbridge software is and in our guide to weighbridge ERP integration.
Calibration note: automation does not replace legal metrology. The weighbridge, load cells and indicator must still be calibrated, stamped and verified at the intervals required by the Legal Metrology authorities, and after any repair or relocation.
Choosing components for your site
- Check the existing platform and indicator and decide what can be reused.
- Choose identification: RFID for repeat fleets, ANPR for mixed or visiting vehicles, or both.
- Plan the lane: barrier, traffic light, sensor and camera positions for both directions.
- Agree the data flow with your ERP or dispatch team before installation.
Suraj Informatics supplies complete unmanned weighbridge systems for plants, mines, ports and warehouses in India on the GATIVRA platform.
Unmanned weighbridge components: common questions
What are the main components of an unmanned weighbridge?
The weighing platform with load cells and indicator, automation devices such as RFID or ANPR, barriers, traffic lights, position sensors and cameras, and weighbridge software.
Can I add automation to my existing weighbridge?
Usually yes, if the platform and indicator are in good condition. Automation devices and software are added around them.
Why are position sensors needed?
They make sure the whole vehicle is on the platform before the weight is captured, which prevents short weighing.
Do I still need to calibrate an unmanned weighbridge?
Yes. Calibration and stamping under legal metrology rules are still required at the prescribed intervals.
Talk to our weighbridge team
Tell us about your weighbridges and daily truck volumes, and we will suggest the right components.
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