Safety control method for AGV vehicle in vehicle maintenance mode and AGV vehicle

By installing an overstepping control switch and a personnel detection device on the AGV vehicle, combined with real-time monitoring by position data sensors, the problem of insufficient safety detection performance in the AGV vehicle maintenance mode has been solved, achieving a safety level upgrade to PLd level and ensuring the safety of operators.

CN122143625APending Publication Date: 2026-06-05LINDE CHINA FORKELEVATOR TRUCK CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LINDE CHINA FORKELEVATOR TRUCK CORP
Filing Date
2024-12-04
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing AGV vehicles have poor over-authority control safety detection performance in maintenance mode, which cannot guarantee the safety of operators and is difficult to achieve the safety level of PLCs.

Method used

An over-authority control switch and a personnel detection device are used to determine whether the over-authority control safety detection function is activated by means of a signal. This controls the detection functions of the AGV control system and the AGV safety system respectively, limits the travel speed, and monitors the speed in real time through a position data sensor to ensure safe operation under over-authority control.

Benefits of technology

The system achieves safe control of AGV vehicles in maintenance mode, with the driving speed always limited to within 0.7m/s, ensuring the safety of operators. The safety level reaches PLd level, meeting the requirements of ISO 3691-4.

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Abstract

The application discloses a kind of AGV vehicle maintenance mode under safety control method and AGV vehicle, comprising: in response to determining that AGV vehicle is in maintenance mode and obtaining the enable signal of over-ride control switch, the over-ride control safety detection area around AGV vehicle is determined based on the enable signal of over-ride control switch;In response to detecting that there is personnel in over-ride control safety detection area, then respectively start the over-ride control detection function of AGV control system and the over-ride control detection function of AGV safety system;The current lifting height and travel speed instruction of AGV vehicle are acquired, and AGV vehicle is controlled to travel at a travel speed not exceeding the speed limit value corresponding to the current lifting height by the current lifting height, travel speed instruction, the over-ride control detection function of AGV control system and the over-ride control detection function of AGV safety system.The application can limit the safety of personnel and vehicle in over-ride control safety detection process, effectively improve safety level.
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