Safety & Anti-Mislifting · HDC2107

Intelligent Power-Analysis Anti-Mislifting System

Detects un-disengaged twistlocks and container hang-up incidents through CNN analysis of motor electrical waveforms — false-alarm rate < 0.5 %, 0 % missed alarms.

Request data sheet

Overview

When a twistlock fails to fully disengage, continued hoisting can lift the entire trailer together with the container — a major cause of port accidents. Celijia's anti-mislifting system analyses the multi-impulse signature of the hoisting motor's transient electrical parameters using a Convolutional Neural Network to detect the unique waveform of a trailer-lifting event.

Because the system is based on the Intelligent Power-Analysis Sensor — pure electrical signal analysis — it is inherently insensitive to weather and lighting conditions, eliminating the persistent false alarms typical of camera- or laser-based solutions.

Deployed on remotely operated rail-mounted gantry cranes in Zhejiang, the system successfully prevented a real trailer-lifting incident in December 2025.

Key features

Built on the Intelligent Power-Analysis Sensor
False-alarm rate < 0.5 %, missed-alarm rate 0 %
Detects all four twistlock combinations and snagging conditions
CNN-based waveform recognition, OTA model upgrades
Unaffected by rain, fog, temperature or vibration
Validated by 6 years of R&D and 100+ field installations
Cycle-time saving ≈ 5 s per lift; ≈ 10 % energy saving

How it works

Architecture & operating modes

Schematic illustrations showing where the system sits in the crane control loop and how it behaves under each fault scenario.

Celijia Anti-Mislifting System wiring diagram — main cabinet, voltage step-down, current sensors on the three motor phases, fiber-optic link, operator display, power-signal acquisition unit and a dedicated safety detection / analysis unit. — Full system layout — current sensors clamp around the three hoist-motor phases (A/B/C) and feed the power-signal acquisition unit. A dedicated safety detection & analysis unit runs the CNN waveform recogniser, producing both an overload signal and an anti-mislifting trigger to the crane control.

In the field

Installation photos

Shenzhen Mawan blind test — both front twistlocks locked, container hangs on truck.

Shenzhen Mawan blind test — both front twistlocks locked, second view.

Shenzhen Mawan blind test — both rear twistlocks locked, container hangs on trailer.

Shenzhen Mawan blind test — both rear twistlocks locked, second view.

Shenzhen Mawan blind test — left-front and right-front twistlocks locked.

Shenzhen Mawan blind test — left-front and right-front twistlocks locked, second view.

Shenzhen Mawan blind test — left-rear and right-rear twistlocks locked.

Shenzhen Mawan blind test — left-rear and right-rear twistlocks locked, second view.

December 2025 — actual trailer-lifting event captured on a remotely operated rail-mounted gantry crane in Zhejiang, intercepted by the Celijia anti-mislifting system.