Metrici LPR was installed at the entrance of each service location, paired with two inductive loops — one before the gate and one after. For this project, Metrici developed custom firmware for the Barix Barionet 50 LAN controller.
This device, combined with the custom firmware and Metrici software, receives and sends triggers based on detected events. Each location has two Barix Barionet 50 units, each linked to a gate, inductive loops, and the Metrici software.
STEP 01
First Loop Trigger
When a vehicle passes over the first inductive loop (before the gate), the Barix controller sends a trigger to Metrici to begin LPR detection. The gate opens automatically.
STEP 02
Plate Detection & Recording
Metrici captures the license plate and a photo, recording both in its database and forwarding them to Autoklass's management system.
STEP 03
External System Response
The external system checks whether the vehicle has a service appointment. If confirmed, it signals Metrici and the Barix controller to keep the gate open.
STEP 04
Second Loop Confirmation
Within 30 seconds, if the second inductive loop (after the gate) is activated, it confirms the vehicle has entered the premises.
STEP 05
Service Appointment Check
Barix sends a second trigger to the external system to verify whether the entering vehicle has a registered service command.
STEP 06
Unauthorized Entry Alert
If no appointment is found, an email alert with the vehicle's photo is sent to designated managers at that location.
Example Alert Email
Timisoara: On 2017-11-21 15:34:04, a vehicle entered without a service appointment.
Plate number:
TM44AKT
Vehicle belongs to:
NO CLIENT
Timestamp: Nov 21 2017, 3:34 PM
[Photo attached]
Metrici also logs events when a vehicle has no license plate or the plate cannot be recognized. In such cases, the plate number is displayed as "UNKNOWN" — but a photo capturing the event is still attached to the alert email.
