Boom structure fatigue strength monitoring method, equipment, system and fire truck

Abstract

The invention discloses an arm frame structure fatigue strength monitoring method, device and system and a fire truck. The monitoring method comprises the following steps: receiving stress value of at least one detection point of an arm frame structure in working state; for each detection point, calculating accumulated fatigue nominal stress frequency thereof according to the stress value thereof; and determining maintenance and / or scrapping of the arm frame according to the accumulated fatigue nominal stress frequency and preset maintenance frequency and / or preset scrapping frequency. The method can prevent the fatigue strength of the arm frame from being misjudged, and the arm frame can be maintained and / or scrapped in time, thereby improving usage efficiency and work security of the arm frame.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a method, equipment, system and fire truck for monitoring the fatigue strength of a boom structure. Background technique [0002] Some construction machinery, such as fire trucks, are generally equipped with retractable ladder ladders or foldable booms, which can be used by firefighters to climb up to put out fires and rescue trapped people. Fire trucks with booms are ideal for high-rise buildings. The main weapon for fire fighting and emergency rescue. When the jib structure is subjected to repeated loads, fatigue failure will occur, which seriously affects the working performance of the jib structure and even threatens its safety. As a special engineering structure, the ladder frame (arm frame) of the fire truck has a great work intensity during fire fighting or rescue operations, and the fire truck is usually used for daily training and actual combat exercises, which make...

AI Technical Summary

Problems solved by technology

Therefore, if the length of use is used as the basis for fatigue failure judgment, it is very likely to cause misjudgment

In addition, the existing method does not have an intelligent early warning mechanism for the structural stress and fatigue strength of the ladder frame (arm) of the fire truck, so that the user must manually record the use frequency and duration of the fire truck, and the maintenance or scrapping of the fire truck is also artificial. Judgment, this greatly increases the complexity of the use and maintenance of fire trucks, and indirectly increases the safety risk of its use

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