GB/T 47720-2026Lifting appliances — Remote control systems — General technical specification (English PDF)

6.1 Basic Requirements

6.1.1 In addition to complying with the provisions of GB/T 6067 (all parts) and GB/T 5226.32, the remote control system shall also comply with 6.1.2 to 6.1.6. Requirements.

6.1.2 The remote control system should be able to operate normally under the permissible working conditions of the lifting machinery.

6.1.3 Under the permissible operating conditions of the lifting machinery, the remote control system should be able to ensure clear and continuous image display from the video monitoring equipment. Require.

6.1.4 The remote control system should have a self-test function. When any component of the remote control system detects a fault, an alarm should be issued and remote control should be stopped. control.

6.1.5 The human-machine interface devices, video systems, and other sub-devices and subsystems in the remote control system should have a unified time synchronization function to ensure that the time is consistent. Consistent.

6.1.6 The remote control system shall have the ability to resist electromagnetic interference and shall work normally in the environment in which the lifting machinery is allowed to operate.

6.2 Remote Operating Station

6.2.1 A remote operating station generally consists of a control device, a human-machine interface device, an emergency stop switch, audible and visual alarm devices, and a video display, etc.

It should have functions such as real-time control, human-computer interaction, and safety protection.

6.2.2 The spatial dimensions of the remote operating station should be matched to the operator's work mode and the length of continuous working time, meeting the operator's requirements for good working conditions. Work and activities in a good ergonomic state.

6.2.3 Remote operation should be resistant to human interference. The remote operation station should be installed in a relatively safe space or location, and its installation location should be convenient for operation. Operator operation.

6.2.4 The remote control station should be able to display the working status of the lifting machinery in real time.

6.2.5 Under permissible conditions, it shall not pose a safety risk or cause injury to the operator.

6.2.6 The arrangement and characteristics of the control device shall comply with the provisions of GB/T 24817 (all parts).

6.2.7 When the remote control system has one-to-many and/or many-to-many control switching functions with the lifting machinery, it should ensure that only one crane can be controlled at a time.

The equipment is controlled by only one remote operating station, ensuring that the monitoring screen and control device are switched synchronously.

6.3 Video System

6.3.1 The video image should be clear, continuous, and unobstructed, covering the working area of the lifting machinery, with no obvious distortion, and real-time monitoring.

The resolution of the control and video storage images should meet the requirements of remote control and video monitoring of lifting machinery under different working conditions.

6.3.2 The video display content should include, but is not limited to.

a) The operating area of the lifting machinery;

b) Initial and final positions of the lifting points.

6.3.3 The video display should be placed in an appropriate location on the remote operating station, and its distance, height and size should be convenient for the operator to view.

6.3.4 When the target video is interrupted or cannot be updated in a timely manner, the remote control system should be able to automatically determine and stop remote control.

6.3.5 The end-to-end delay time of the video image should meet the working requirements of the lifting machinery under different working conditions and should not exceed 350 ms.

6.4 Communication System

6.4.1 The communication system includes control information communication and video communication, enabling the remote operator station and the lifting machinery to exchange control commands, status information, and... Video signal transmission.

6.4.3 When using wired communication, control signals and video signals should be transmitted separately.

6.4.4 Control signals should adopt a communication protocol with high real-time performance and stable continuity, and the communication delay time should be less than 50 ms.

6.4.5 The video network bandwidth should meet the high bandwidth requirements for video signal transmission, and the transmission delay, packet loss rate, packet error rate, and spurious packet rate should meet the requirements. It meets the requirements of GB/T 28181.

6.4.6 The signal strength within the wireless network operating area should not be less than -70 dBm.

6.4.7 The system should have network status monitoring capabilities. In the event of communication interruptions, timeouts, or other abnormal situations, the lifting machinery should automatically stop remote operation.

The crane should not operate until the operator correctly issues another control command.

6.4.2 Communication methods can be wired or wireless

6.5 Control functions of the remote control system

6.5.1 Operation permission management should meet the following requirements.

a) It has an operation mode selection function, such as local operation, remote manual operation and unmanned operation;

b) After the operation mode selection is completed, the current operation mode will be displayed;

c) Multiple operation modes are set with priority, from highest to lowest. local operation, remote manual operation, and remote unmanned operation;

d) The operating modes are interlocked, and only one operating mode is allowed to be in operation at any given time.

6.5.2 The management of operation instructions shall meet the following requirements.

a) Monitor the execution status of operation commands;

b) Report and display the results of remote control execution.

6.5.3 Work task management should meet the following requirements.

a) Complete information exchange with the higher-level system;

b) Complete the work task assignment, task status monitoring, and abnormal task management.

6.5.4 When a remote control system controls multiple lifting machines to work in the same working area, it should have the capability for safe coordinated scheduling of multiple lifting machines. Strategy.

6.5.5 The remote control system shall monitor and manage the status information of the lifting machinery, including operating data and fault information.

6.6 Security Functions

In addition to possessing the corresponding functions, lifting machinery employing remote control systems at different levels of intelligence must also meet the following rules.

a) The safety protection functions of lifting machinery should meet the technical requirements of various lifting machinery standards;

b) To ensure the safe use of the remote control system, an emergency stop button should be installed at an appropriate location outside the lifting machinery when necessary;

c) Lifting machinery should have anti-collision protection against obstacles in the working area;

d) Based on the different intelligence levels of the lifting machinery, set up electronic or physical isolation measures to enclose the work area, and isolate all personnel who can enter the enclosed area.

Interlocking protection should be installed between the passageway or door in the closed area and the lifting machinery;

e) When lifting machinery operates in conjunction with other equipment, interlocking protection should be installed between the lifting machinery and other equipment.

7.1 Test Conditions

7.1.1 Before the test, the lifting machinery shall complete routine inspections and functional tests, and all of them shall pass.

7.1.2 The environmental conditions during the test shall meet the working conditions required for the crane to operate.

7.1.3 The testing tools shall be verified or calibrated, and their accuracy shall meet the testing requirements.

7.1.4 Test tools include, but are not limited to, the following.

a) A precise timing tool with an accuracy of 1 ms;

b) Software packet capture tools;

c) Wireless network management tools.

7.2 Remote Operating Station

7.2.1 Visually inspect whether the remote control station includes the devices required in 6.2.1. The operator controls the lifting machinery through the remote control station. See if all assignments can be completed.

7.2.2 Check whether the space dimensions of the remote operating station are suitable for all operators' work and activities, such as. whether the seat height is adjustable, and whether the seat is in close proximity to the operator. Whether the spacing between worktables is adjustable, etc.

7.2.3 Visually inspect whether the remote control station can display the working status of the crane being operated.

7.2.4 Trigger the emergency stop switch and check if the lifting machinery has stopped working.

7.2.5 Switch the controlled lifting machinery and send operation commands, check whether the video feed switches synchronously, and whether the safety protection is effective.

Check whether the selected lifting machinery is operating under control and whether the unselected lifting machinery is not under the control of this remote operator station.

7.3 Video System

7.3.1 Visually inspect whether the content of each frame of the video system meets the requirements of 6.3.1 and 6.3.2, and whether the monitor installation location is convenient for operation. The staff watched.

7.3.2 Manually causing interruptions or delays in updating monitoring screens related to remote control, such as unplugging and plugging in the network cable, or checking whether remote control can be stopped normally. control.

7.3.3 Prepare two precision timing tools and one image acquisition device. Place the two precision timing tools together and turn on the timing function.

Yes, you can use an image acquisition device to photograph two timing instruments and obtain the first time difference between them. Place the first timing instrument... In front of the camera under test, a second timing device is placed in front of the video monitor in the remote operation station, and the footage captured by the first timing device is retrieved.

The camera feed is used to capture images of two timing devices, obtaining a second time difference between the two timing devices. The difference between the two time differences is... This is the image delay time.

7.4 Communication System

7.4.1 Check whether control information communication and video communication are transmitted separately.

7.4.2 Conduct network packet exploration tests within the wireless network coverage area for a period of time (customizable), at multiple points (customizable), and multiple times (customizable).

Perform a network packet exploration test, take the maximum value, and test the terminal-to-terminal latency.

7.4.3 Turn on all screens of the video system and visually inspect the monitoring screen for any stuttering to verify the video communication network bandwidth.

7.4.4 Using wireless network management tools, monitor the signal strength within the wireless network coverage area for a specific period (customizable) and at multiple points (customizable). Degree, take the minimum value.

7.4.5 If communication is interrupted or timed out manually, check whether the lifting machinery can automatically stop remote control. For lifting machinery with levels 1-5 of intelligent control... For heavy machinery, check if the lifting machinery is not operating automatically if there is no manual reset operation.

7.5 Control functions of the remote control system

7.5.1 The method for checking the remote control system's operation permission management function is as follows.

a) Switch between different operating modes to check if the corresponding operation management can be achieved;

b) Switch between different operating modes and check whether the lifting machinery has a corresponding display and whether it can distinguish between different operating modes;

c) Check the priority of the operation mode, such as. selecting remote operation mode, switching to local operation via the local control terminal, and checking the crane. Whether the device has exited remote operation mode;

d) Check whether the various operating modes are mutually locked. For example, if switching to local operating mode prevents remote control of the lifting machinery from entering the operating mode... To carry out work.

7.5.2 The method for checking the operation command management function of the remote control system is as follows.

a) The operator issues control commands through the remote control system to check whether the lifting machinery executes the commands;

b) When the lifting machinery is working, check whether the execution status of the operation commands can be monitored on the remote control system;

c) After the lifting machinery has finished its work, check whether the command completion result can be viewed on the remote control system.

7.5.3 The method for checking the task management function of the remote control system is as follows.

a) Send the work task through the host system, and check whether the remote control system can obtain the task information from the host system and execute it.

Feedback on task execution status and completion of information exchange with the host system;

b) Without operator intervention, check whether the remote control system can automatically assign tasks, monitor task execution status, and [other functions]. It can manage abnormal tasks.

7.5.4 The method for checking the coordinated protection function between multiple lifting machines is as follows.

a) Schedule two cranes within the same work area to perform the same task, and check whether both cranes are performing the task. If not... Does the execution process display any relevant prompts or messages?

b) Check the operation instructions, tasks, equipment status and other information of all lifting machinery managed by the remote control system.

7.5.5 The method for checking the status monitoring function of the remote control system equipment is as follows.

a) Check whether there are indicator lights and buzzers on the control panel that can display the working status, running status and fault information of the lifting machinery;

b) Check the remote control system's operating interface to see if it has pages that can display device information, device operating data, and device fault information, and whether these pages are accessible.

The display should be accurate, including information such as the power status of each mechanism of the lifting machinery, the operating data of the drive unit, and fault codes.

c) Either a) or b) is sufficient.

7.6 Security Functions

7.6.1 The method for checking the emergency stop function is as follows. trigger any emergency stop switch in the working area and check whether the lifting machinery can be stopped in an emergency.

7.6.2 The method for checking the anti-collision protection function is as follows.

a) Operate the lifting machinery close to fixed obstacles in the work area and check whether the lifting machinery collides with the obstacles;

b) Switch the operating mode of the lifting machinery and check whether the anti-collision protection is effective in each mode.

7.6.3 The method for checking the enclosure function of the work area is as follows. Open the safety door of the enclosure area and check whether the lifting machinery in the relevant area stops automatically.

Check whether the lifting machinery in other areas can continue to operate.

7.6.4 The method for checking the interlocking protection function is as follows. In the automatic operation state of the lifting machinery, operate the interlocking conditions of the lifting machinery triggering mechanism, and move... Connect the crane or disconnect the interlock signal of the crane, and check whether the crane has stopped.

8.1 Inspection Classification

Inspection is divided into factory inspection and type inspection.

8.2 Factory Inspection

The factory inspection items should comply with the provisions of Table 2.

8.3 Type Testing

8.3.1 Type testing shall be conducted under any of the following circumstances.

a) During the trial production and type approval of new products or old products transferred to another factory for production;

b) If, after formal production, there are significant changes in structure, materials, or processes that may affect product performance;

c) When production resumes after a product has been suspended for more than one year;

d) When the factory inspection results differ significantly from the previous type inspection results;

e) When relevant parties request type testing.

8.3.2 The type test items shall comply with the provisions of Table 2.