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Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller

A technology for construction machinery and controllers, which is applied in the field of protection against failure of the CPU of construction machinery controllers. It can solve problems such as abnormal states of machines, and achieve the effects of reducing engineering accidents and achieving a high level of intelligence.

Active Publication Date: 2013-11-13
GUANGXI LIUGONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can temporarily release controller resources, but it cannot solve the fundamental problem. Instead, it will cause repeated abnormal states when the machine is working.

Method used

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  • Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller
  • Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller
  • Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller

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Embodiment 1

[0028] Such as figure 1 Shown is a schematic diagram of the relationship between the CPU protection module and the CPU of the present invention. In this embodiment, the protection method is applied to the CPU of the loader variable speed controller. The specific implementation of the protection method for the loader CPU of the present invention against failure is as follows:

[0029] ① Set up a protection module in the loader variable speed controller CPU that can detect whether the CPU is "frozen" by software, and define the minimum safety control task of the protection module. The minimum safety control task is to control the loader gearbox to shift gears;

[0030] ②Define the detection frequency of the background system as 10ms, and the default value for determining the number of failures of the background system is 50;

[0031] ③Associate the protection module with the CPU front-end system of the loader variable speed controller, so that the protection module can perform minimum s...

Embodiment 2

[0042] In this embodiment, the protection method is applied to the CPU of the excavator controller. The specific implementation of the protection method of the invention is as follows:

[0043] ①Set up a protection module in the excavator controller CPU that can detect whether the CPU is "frozen" by software, and define the minimum safe operation task of the protection module. The minimum safe operation task is to control the flow rate of the excavating arm flow valve Perform speed control of excavation.

[0044] ②Define the detection frequency of the background system as 20ms, and the default value is 40 times; associate the protection module with the excavator controller CPU front-end system, so that the protection module can perform minimum security control in the front-end system when the CPU is in the "dead" state task;

[0045] ③Add a protection module display mark in the protection module. The mark and the sound and light alarm connection of the excavator's instrument through...

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Abstract

The invention discloses a protection method for preventing invalidation of a CPU of a construction machinery controller. With a software adoption method, a CPU protection module is embedded into a control program of the controller, so that when a 'crashed' state occurs to the CPU, the controller can still operate in a minimum safe working state. The protection method has the advantage of observability, that is, the CPU can detect the 'crashed' state and give a corresponding fault prompt, and at the same time, the protection method has the advantage of controllability, when the CPU is in the 'crashed' state, a foreground system can control the state with a minimum control task mode, and certain protection is performed on a machine or the controller; and when the CPU recovers from the 'crashed' state, a task control right is returned to the background for processing, and the intelligent level is high.

Description

Technical field [0001] The invention relates to the technical field of engineering machinery and embedded electronics, and specifically to a method for protecting the CPU of an engineering machinery controller against failure. Background technique [0002] With the development of construction machinery technology, more and more construction machinery manufacturers have gradually changed from a single functional requirement to a deeper need for safety and environmental protection. At the same time, they use traditional manual control of engine systems and hydraulic systems to adopt electronic systems. Intelligent detection and control. However, when electronic systems are used for control, due to the particularity and complexity of electronic products, it will inevitably affect the reliability of the system. For example, the CPU of the controller is susceptible to external bus interference and the control program cannot be Normal operation, resulting in a "crash" phenomenon. In o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
Inventor 马文宇蔡登胜孙金泉赵明辉王志伟
Owner GUANGXI LIUGONG MASCH CO LTD
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