A protection method against failure of construction machinery controller cpu

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: 2016-12-28
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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  • A protection method against failure of construction machinery controller cpu
  • A protection method against failure of construction machinery controller cpu
  • A protection method against failure of construction machinery controller cpu

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, it 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 loader CPU failure prevention protection method of the invention is as follows:

[0029] ①In the loader variable speed controller CPU, set a protection module that can detect whether the CPU is "dead" through software methods, 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 times;

[0031] ③Associate the protection module with the CPU foreground system of the variable speed controller of the loader, so that the protection modu...

Embodiment 2

[0042] In the present embodiment, this protection method is applied in the CPU of excavator controller, and the protection method of this invention is specifically implemented as follows:

[0043] ①In the CPU of the excavator controller, set a protection module that can detect whether the CPU is "dead" through software methods, and define the minimum safe operation task of the protection module. The minimum safe operation task is to control the flow rate of the flow valve of the excavator arm Perform speed control of digging action.

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

[0045] ③In the protection module, a protection module display mark is added. The mark is connected with the sound a...

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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 construction machinery and embedded electronics, and in particular relates to a protection method for preventing failure of a CPU of a construction machinery controller. Background technique [0002] With the development of construction machinery technology, more and more construction machinery manufacturers have gradually shifted from a single functional requirement to a deeper requirement for safety and environmental protection. Intelligent detection and control, however, when electronic systems are used for control, due to the particularity and complexity of electronic products, it is bound to have an impact on the reliability of the system. For example, the CPU of the controller is easily interfered by the external bus and the control program cannot Normal operation, resulting in "crash" phenomenon. In order to solve the problems caused by the failure of the controller CPU, various companies have mad...

Claims

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Application Information

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