1. Hardware composition

The tower crane control application system is mainly composed of a man-machine interface, a 3G module and a single chip microcomputer connected to the tower crane controller to form a complete control system.

Among them, the man-machine interface chooses WECON man-machine interface. It is the most cost-effective touch screen on the market. It can communicate with various PLCs on the market, such as Mitsubishi, Siemens, Omron, Emerson, etc., and can also communicate directly with the microcontroller through MODBUS. The programming method is simple and easy to learn, even if there is no professional Knowledge can also be quickly mastered. The response speed of the touch screen is fast, which can meet the higher requirements of the scene.

2. Application Background

The functions of the tower crane safety monitoring equipment promoted on the construction site must meet the relevant requirements set out in the "Implementation Plan for the Promotion and Use of the Tower Crane Safety Monitoring System". According to the unified network interface and communication protocol, the torque, weight, height, Operating information such as amplitude, slewing, wind speed, area protection, and collision are transmitted to the tower crane safety monitoring platform in real time, and the alarm error should not be greater than 5%, and ground monitoring and remote monitoring can be achieved at the same time.

During the operation of the tower crane, the monitoring equipment will issue an alarm prompt message to the operation behavior when it is close to the safe use performance parameter limit value, prompt the operator to operate in a safe area, achieve the purpose of reducing safety production accidents, and make statistics and guidance on violations The equipment management personnel of each department conduct targeted management of the tower crane, which is an auxiliary means for the safe operation of the equipment. After the installation is completed, the mechanical limit and safety alarm device of the tower crane shall be debugged in strict accordance with the safety performance requirements of the tower crane.

Introduction of Black Box:

What is a tower crane black box: "black box" is a popular name for "data recorder", which can save the data before stopping work for experiment and accident analysis. The black box of the tower crane can be defined as follows: it is a device that records the working status of the tower crane, and the recorded data can be re-read out to restore the working status of the tower crane when needed.

With the development of society, people have higher and higher requirements for safety, and the losses caused by accidents are also increasing. So in order to comprehensively analyze the causes of accidents and effectively prevent the occurrence of accidents, people introduced the "black box" technology In various fields, "marine black boxes", "car black boxes", "elevator black boxes" and "tower crane black boxes" we have seen today have appeared.

The significance of the tower crane black box: As a branch of the "black box", the tower crane black box has its own characteristics while inheriting the basic data recording function. Most of the tower crane black boxes currently produced and sold in China are accompanied by data displays The weight limit function has now become the operator's foreseeable pre-processing. By reading the display data, you can know in advance whether the lifted cargo is within the rated lifting weight, and where the maximum amplitude of horizontal transport can be. . It can greatly reduce the risk of overrun operation and prolong the overhaul period of the tower crane. Secondly, the data recorded by the black box of the tower crane can be used as an effective basis for safety production management. By regularly reading the recorded data, the safety education of the personnel who frequently and dangerously operate can play a role in preventing the slightest.

3. Tailor-made solutions

The application case can be divided into three major blocks:

Workflow monitoring: This is the main part used for real-time monitoring; monitoring real-time data such as car position, hook position, and alarm conditions, such as: left and right limit, far and near limit, torque alarm and other real-time information.

Debugging process: It is mainly used to initialize the debugging data parameters, such as the magnification of the tower crane, the position of the trolley, the gear of the trolley, the rotation angle, the position of the hook, etc.

Black box query: collect data in real time and send the data to the remote monitoring terminal for analysis.

3.1 Workflow monitoring

In the workflow, the data is monitored in real time. The single chip microcomputer transfers the real-time data such as the height, gear, and rotation angle of the hook in the tower crane to the man-machine interface.

3.2 Commissioning process

The debugging interface includes: height sensor calibration and range setting, weight sensor calibration, trolley sensor calibration and range setting, swing sensor calibration and range setting, etc. For example, the car debugging is as follows:

3.3 Black box query

Data will be collected in real time during the entire project operation and stored in the black box. And send the data to the control center.

4. Conclusion

According to the customer's reaction, in the tower crane industry, despite the dust on the site, large interference, high temperature and other conditions, the WECON touch screen can fully adapt to this industry. The use of micro-controller man-machine interface greatly reduces the manpower of the tower crane operation, improves the tower crane's requirements for the precise operation of the trolley and the hook, and ensures the operation efficiency of the equipment

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