Solution | Dock Collision Warning System

During the dock production process, the working conditions of the gantry crane and other equipment are complicated, and there are situations such as crossing, crossing, and parallel cranes. At the same time, the gantry crane boom is too long and difficult to see directly when backlit, and the environment is foggy. These factors are very likely to cause safety hazards and increase the risk of equipment colliding with each other.

In order to effectively ensure production safety, Weite launched a dock area anti-collision warning system to accurately deal with the above-mentioned problems and ensure the safety of dock operations.

Technical principle

Combining the equipment layout of the dock and slipway, the operating principles of each crane equipment mechanism, and the requirements for collision prevention, this solution uses the three-dimensional space simulation anti-collision system developed by Weite to achieve the required functions.

The main scenarios in which dock cranes may collide

Four major technical sections of system design:

1. Crane structure decomposition modeling

The associated crane equipment is decomposed into N hexahedron data models according to the actual size of the entity structure. The basic size of the data model is established at a 1:1 ratio according to the actual geometric size of the crane, which truly reflects the assembly position relationship and external dimensions of the crane equipment entity.

2. Dock site space modeling

The track of the crane associated with the dock site and its track spacing relationship are established in a 1:1 mathematical model, which accurately and clearly reflects the position relationship of each track in the dock space.

3. Unified coordinates of crane and dock space

Bring the associated crane model into the dock site model, take the dock space as the unified coordinate system, and the track direction as the X-axis, and truly reflect the key information such as the position of each crane, the boom orientation, and the hook height in the dock space mathematical model.

4. Anti-collision monitoring alarm

The program forms a protection surface to wrap the various parts of the crane according to the set protection range value, forming a three-level progressive protection reminder of early warning, deceleration, and stop. The system converts the real-time collected sensor data into the position of the cubes of each crane component after calculation.

Solution

According to the collision analysis, the collision prevention of portal crane and gantry crane requires monitoring the real-time changing parameters such as the position of the trolley, the rotation angle of the portal crane boom, the pitch angle of the portal crane boom, the position of the gantry crane trolley and the hook height, as well as the geometric dimensions of the key positions of the crane. Therefore, it is necessary to install a signal acquisition device and a sensor on the crane to collect the above data that need to be monitored.

Since the collision action is mutual, the actions between cranes need to be sensed by each other, and the status of the crane needs to be informed to the adjacent cranes, so it is necessary to establish a communication network for data exchange between cranes, that is, wireless network networking.

To prevent collisions, not only does it require the crane to receive an alarm reminder in a timely manner, but it also needs to consider automatically stopping dangerous actions when necessary. Therefore, a data processor and an alarm and control device must be installed on each crane to process the collected and communicated data in real time, calculate the current position of each dangerous mechanism and the distance to the adjacent crane, and output an alarm reminder and control signal when the distance is less than the safe distance to achieve collision protection.

Typical project requirements

1. Anti-collision system integration: The anti-collision system needs to integrate the on-site anti-collision algorithm to realize independent anti-collision alarm and control between crane groups.

2. Communication networking: The communication between cranes needs to be independently networked, and redundant backup is designed to ensure that the failure of a single crane does not affect the overall anti-collision function.

3. Positioning technology: Accurate positioning of dock and berth cranes requires independent networking.

4. Trolley position detection, height detection, rotation azimuth detection, monitoring system, etc. Contact professional engineers in the micro-special ship industry to develop specific solutions.

Port equipment group anti-collision implementation project case

System advantages

1. Effectively improve safety performance. The dock anti-collision system can monitor the connection between various installed systems in the dock in real time (such as distance, height data, and parts that are about to collide, etc.), and issue alarms in time with dynamic graphics and text prompts to reduce the occurrence of collision accidents.

2. Reduce economic losses. By effectively preventing collisions, the system can reduce the risk of damage caused by cross-operation of various equipment, thereby reducing economic losses caused by maintenance and shutdown.

3. Assisted driving and enhanced automation construction level. It can achieve automatic docking to a certain extent, detect potential dangers in time, and thus reduce the risk of collision accidents.

4. Weite is independently developed, with high detection accuracy, adaptable to a variety of anti-collision strategies, and supports diversified non-standard customization.

Project case

A large shipbuilding company in Qidong