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Device for detecting abnormality in construction machine

A technology for construction machinery and anomaly detection, which is used in measurement devices, testing of machinery/structural components, mechanical equipment, etc., and can solve problems such as false detection and complex control.

Active Publication Date: 2012-01-18
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in a machine equipped with a large engine such as a hydraulic excavator for mines, there is a temperature difference between the cylinders due to the arrangement of the engine cooling mechanism. The complex control of deactivating individual cylinder banks of an engine when horsepower is required
Under such conditions, using the averaged temperature as a reference will lead to false detection
In addition, the control of the hydraulic pump is performed according to the operation of the operator, but the control is complicated, and it is necessary to use a different determination method from the abnormality determination method used for the control of the engine.

Method used

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  • Device for detecting abnormality in construction machine
  • Device for detecting abnormality in construction machine
  • Device for detecting abnormality in construction machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (Example (1) about the pump)

[0057] Regarding an embodiment of the present invention, taking engineering machinery, that is, a hydraulic excavator as an example, using Figure 1 to Figure 12 Be explained. This embodiment is an embodiment in the case where a plurality of sensors detects three or more identical physical states as a plurality of related physical states. In addition, the present invention is not limited to hydraulic excavators, and can be applied to other construction machines such as cranes, wheel loaders, and bulldozers.

[0058] figure 1 It is a configuration diagram showing the overall system of the abnormality detection device of the present invention.

[0059] The abnormality detection device 1 of the present invention has a configuration including a plurality of sensors 101a, 101b, 101c, . . . Then, sensor signals (sensor information) from the plurality of sensors 101a, 101b, 101c, . In the correlation coefficient calculation unit 102, a plura...

Embodiment 2

[0087] (Example (2) about pumps)

[0088] Using the above examples and Figure 13 Other embodiments of the present invention will be described. This embodiment is a modified example of Embodiment 1.

[0089] Figure 13 In the abnormality detection device 1 in this embodiment, except figure 2 In addition to the shown structure, it also has: for the hydraulic excavator 852 (refer to Figure 18 ) operation information detection unit 202; pump operation determination unit 203 for determining the operation state of each hydraulic pump 904 based on the operation information. The hydraulic excavator 852 has a control lever device as an operating mechanism, and the control lever device generates an operation pilot pressure corresponding to a lever operation amount, and drives the control valve 906 by the operation pilot pressure. The operation information detection unit 202 is, for example, a pressure sensor that detects the operation pilot pressure. In this case, when the oper...

Embodiment 3

[0093] (Example (1) about the engine)

[0094] Regarding other embodiments of the present invention, taking engineering machinery, that is, a hydraulic excavator as an example, using the above-mentioned embodiments and Figure 14 to Figure 17 Be explained. This embodiment is also an embodiment in a case where a plurality of sensors detect three or more identical physical states as a plurality of associated physical states.

[0095] Figure 14 is said to be figure 1 The sensor 101 in the figure is replaced by the engine cylinder temperature sensor 301. As mentioned above, the engine 902 of the hydraulic excavator 852 has 16 cylinders, and the temperature of each cylinder is measured by the 16 engine cylinder temperature sensors 301a to 301p (not shown), so that the temperature of the engine can be known. action state.

[0096] Figure 15 It is a graph showing the engine cylinder temperature measured by the engine cylinder temperature sensor 301a to the engine cylinder tem...

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PUM

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Abstract

Provided is a device for detecting an abnormality in a construction machine, which can estimate an abnormality in mechanism parts such as an engine and a pump of a construction machine on the basis of the relationship among a plurality of pieces of sensor information, thereby preventing the machine from occurrence of any failure. From time-series sensor values obtained by a plurality of sensors (101), a correlation coefficient calculation unit (102) calculates respective correlation coefficients, a correlation coefficient comparison unit (103) compares the correlation coefficients and calculates the degree of the difference between the correlation coefficients, and when the calculated degree of the difference exceeds a predetermined value, an abnormality determination unit (104) determines that there is an abnormality in a part associated with the corresponding sensor.

Description

technical field [0001] The present invention relates to an abnormality detection device for detecting abnormality of construction machines such as hydraulic excavators. Background technique [0002] Construction machinery such as large hydraulic excavators operating in mines or the like may be required to operate continuously for 365 days 24 hours a day with almost no stoppage, and it is necessary to maintain the equipment in a safe state by pre-maintenance work before an abnormal stop. Generally, a dedicated maintenance worker conducts regular inspections to investigate whether there is an abnormality, and if an abnormality is found, maintains a good state of the equipment by performing necessary maintenance work. However, it is necessary to stop the equipment for inspection and maintenance work. Therefore, for an operator who intends to operate the equipment continuously, as long as the equipment is in good condition, the inspection and maintenance work will hinder the ope...

Claims

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Application Information

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IPC IPC(8): G01M99/00E02F9/26F04B49/10
CPCF04B2205/05G05B23/024F04B2205/11F04B49/10F04B2205/03F04B2203/0209F04B2201/1201E02F9/267E02F9/26F04B2207/03F04B49/065
Inventor 铃木英明古野义纪西畑淳
Owner NIHON KENKI CO LTD
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