JPH10183690A - Maintenance system for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance system wherein contents of operation at the working site can be surely reported to a control part so that the diagnosis of a working machine can be performed. SOLUTION: A control part side maintenance device 20 includes a control part side control element 21, display 22, and communication controller 23, and a machine side maintenance device 30 includes a machine side control element 31, group 32 of operation content switches, operation end switch 33, and communication controller 34. When an operator operates a working machine, a switch for indicating contents of operation of the working machine of the group 32 is depressed to operate the working machine. The control element 31 takes necessary data corresponding to the operation and also sends the data together with a code corresponding to the operation to the control element 21. Thus the control part can surely grasp the contents of the operation to make a precise diagnosis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine maintenance system for performing required maintenance on work machines such as hydraulic excavators, cranes, and bulldozers.

[0002]

2. Description of the Related Art Generally, a working machine is often used under severe conditions, and each part of the machine is severely worn. For this reason,
Appropriate maintenance management is required for these work machines. Since the maintenance management requires highly specialized knowledge, the work machine manufacturer usually performs the maintenance management. In conventional maintenance management, a maintenance worker is dispatched to a work site of a work machine to be maintained, operates the work machine, and writes data obtained by various sensors provided at required parts of the work machine into a controller and data writing. This is performed by recording the data on an IC card via an apparatus and analyzing the various data thus recorded by an analyzer to detect an abnormality of the work machine or a sign thereof. FIG. 7 shows an installation example of the various sensors.

FIG. 7 is a circuit diagram of a part of a hydraulic circuit of a work machine. In this figure, 1 is an engine, 1a is a governor lever of the engine 1, 2 is a hydraulic pump, 2a is a variable displacement capacity mechanism of the hydraulic pump 1, 3 is a pilot pump, 4 is a hydraulic cylinder, 5 is a hydraulic pump 2 and a hydraulic cylinder 4 , A pilot valve 6 for operating the flow control valve 5, 6a an operating lever of the pilot valve 6, and 7 a hydraulic oil tank. When the operator operates the operation lever 6a in any direction, the flow control valve 5 is displaced in accordance with the operation direction, and the hydraulic oil of the hydraulic pump 2 is supplied to the hydraulic cylinder 4 to drive it. , The work unit is driven to perform required work. In the figure, reference numerals 8 and 9 denote pressure switches for detecting the operation direction of the operation lever 6a, 1
0 is an angle sensor that detects the amount of displacement of the governor lever 1a;
Reference numeral 11 denotes a rotation speed sensor for detecting the rotation speed of the engine 1;
3 is a pressure sensor for detecting the discharge pressure of the hydraulic pump 1, 14
Is a temperature sensor for detecting the temperature of the hydraulic oil tank 7.
Although not shown, a sensor or the like for detecting the driving amount (angle) of the working unit is provided.

In many cases, the work site of a working machine is constantly moving due to work or a change in work plan, and maintenance personnel perform maintenance. When a worker goes to the work site of a work machine, there is often a situation where the work machine does not exist there. In this case, the maintenance staff is wasted on the work site and maintenance efficiency is significantly reduced. Further, when the work site is located in a relatively remote place such as a mine or a quarry, it takes a long time even if a maintenance person visits the work site, and similarly, the work efficiency is remarkably deteriorated.

In order to cope with such a situation, for example, Japanese Patent Laid-Open Publication No. Hei 7-166852 discloses that a maintenance person can perform wireless communication between a management unit in which a maintenance person is resident and a work machine so that the maintenance person can operate the work machine. The operator requests the operator to operate the work machine in a required mode, or a maintenance worker remotely operates the work machine in a required mode, receives data of various sensors obtained as a result of the operation, and receives the received data. Means for diagnosing a work machine based on data is presented.

[0006]

However, the work site is usually noisy and the radio wave condition is poor, and even if the maintenance staff requests the operator to operate in a required mode, it is necessary to inform the operator of the situation. In many cases, it is difficult and automatic operation of work machines requires time and effort because some measures must be taken in advance to prevent accidents. Even if such measures are taken, it is still completely safe. There is a problem that it cannot be said that there is.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art, and to make it possible to surely inform the management unit of the contents of a driving operation at a work site, and to perform a work machine diagnosis which can surely diagnose a work machine. An object of the present invention is to provide a machine maintenance system.

[0008]

In order to achieve the above object, the present invention provides a work machine with data collection means for collecting data on the state of each part constituting the work machine, and data collection by the data collection means. And a work machine-side transmitting / receiving means for sending and receiving data to and from the outside, and sending and receiving data to and from a management unit for maintaining the work machine. A work machine maintenance system comprising: a management unit-side transmission / reception unit; and a management unit-side data storage unit configured to store data input via the work machine-side transmission / reception unit and the management unit-side transmission / reception unit. Operation content signal output means for outputting a signal indicating the content of the operation performed by the work machine; data collected by the data collection means in accordance with the operation content; By combining the door, characterized in that a data transmission means for transmitting to said management unit. Further, the present invention is characterized in that, in the maintenance system for a work machine, operation time data is added to the combined data.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a block diagram of a maintenance system for a work machine according to an embodiment of the present invention. In this figure, reference numeral 20 denotes a management unit-side maintenance device installed in the management unit or carried by a maintenance person, and includes a management unit-side control unit 21 and a display unit 2.
2. It has a communication controller 23 (including a transceiver) and its antenna 23a. Management unit side control unit 21
Are the central processing unit (CPU) 211 and the CPU 211
Read only memory (ROM) 2 for storing the processing procedure
12, a random access memory (RAM) 213 for storing the results of arithmetic control and the like, a data storage unit 214 for storing data transmitted from the work machine, an operation content code storage unit 215 (described later), and an input / output interface 216 Have been.

Reference numeral 30 denotes a machine-side maintenance device provided in the work machine. The machine-side control unit 31 and the operation content switch group 32
(Described later), an operation end switch 33 (described later), a communication controller 34 (including a transceiver), and its antenna 3
4a. The machine-side control unit 31 includes a central processing unit (CPU) 311, a read-only memory (ROM) 312 for storing processing procedures of the CPU 311, and a random access memory (RAM) 3 for storing results of arithmetic control and the like.
13, clock 314, data storage address storage unit 31
5 (to be described later), an operation content code storage unit 316 (to be described later), and an input / output interface 317.

Reference numeral 40 denotes an operation controller for performing various controls of the work machine, which is constituted by a microcomputer. The operation controller 40 fetches the detection values of various sensors and the state of various switches provided in the work machine and stores them at predetermined addresses in a storage unit. , For example, horizontal excavation control of a hydraulic excavator.

FIG. 2 is a side view of a hydraulic excavator as a working machine. In this figure, 50 is a hydraulic excavator, 51 is a lower traveling body provided with a crawler, 52 is an upper revolving body rotatably provided on the lower traveling body 51, and 52a is an upper revolving body 52
Cab, 53 is a boom, 54 is an arm,
5 is a bucket. Although not shown, boom 5
3, angle sensors are attached to the rotation centers of the arm 54 and the bucket 55, and the detected values of these angle sensors are also stored as boom angle, arm angle, and bucket angle at predetermined addresses in the storage unit of the operation controller 40. . Reference numeral 30 denotes a machine-side maintenance device shown in FIG. 1, which is provided in the operator cab 52a. 36a is the antenna shown in FIG.

FIG. 3 is a perspective view of an operation content switch group and an operation end switch of the machine-side maintenance device. In this figure,
An operation content switch group 32 shown in FIG. 1 includes operation content switches 32a, 32b, and 32c. Each operation content switch is numbered, but is not shown. The operation content switches 32a, 32b, and 32c indicate, for example, that the hydraulic excavator has performed "boom raising independent operation", "combined operation of boom raising and turning of the upper revolving unit", and "running independent operation", respectively. Used when notifying. Although a necessary number of these operation content switches are provided, illustration of other operation content switches is omitted in the figure. Further, although the operation contents are displayed for each operation contents switch, the display of these displays is also omitted. 33 is an operation end switch shown in FIG.
This is for determining the end of one operation. Reference numeral 300 denotes a case for mounting and storing each operation content switch and operation end switch of the operation content switch group 32, 301 denotes a connector for connecting each operation content switch and operation end switch to the machine-side control unit 31, and 302 denotes a connection cable. The machine-side controller 31 can be housed in the case 300, and the communication controller 36 can be connected to the case 30.
0 can also be stored.

FIG. 4 shows the operation content code storage unit 2 shown in FIG.
15 is a diagram for explaining the contents of a comparison table and a data storage address storage unit 315 stored in reference numerals 15 and 316. FIG. FIG. 4A shows a comparison table stored in the operation content code storage units 215 and 316.
Are associated with the respective operation content switches and their corresponding operation content codes. The content stored in the operation content code storage unit 215 of the management-side maintenance device 20 is the same as the content stored in the operation content code storage unit 316 of the machine-side maintenance device 30, and the control unit of the management-side maintenance device 20 The unit 21 is further provided with a conversion unit that converts the character corresponding to the number of each operation content switch into a character such as, for example, “boom raising single operation”.

FIG. 4B shows a comparison table stored in the data storage address storage section 315, which is composed of operation content codes and corresponding addresses (addresses of the storage section of the operation controller 40). Data to be collected is determined in advance for each operation content of the work machine. In the address section shown in FIG. 4B, the addresses where the data to be collected in advance are stored for each operation content. Therefore, in most cases,
A plurality of addresses are associated with one operation content.

Next, the operation of the present embodiment will be described with reference to the data configuration diagram shown in FIG. 5 and the display screen shown in FIG. Now, it is assumed that a maintenance person is assigned to the management unit maintenance device 20, and an operator or a maintenance person (represented by an operator) is assigned to the work machine. When performing regular maintenance, or if maintenance diagnosis of the work machine is required for any reason, the management unit sends the work machine
Alternatively, the work machine requests the management unit to collect data, and then the management unit accesses the communication controller of the work machine-side maintenance device 30 to perform a line connection operation. On the other hand, the operator turns on an operation content switch (operation content switch 32b in this example) corresponding to the operation content that the operator intends to perform on the work machine, for example, “combined operation of raising the boom and turning the upper revolving unit”. , Start operation of the work machine. When this operation is completed, the operator turns on the operation end switch 33.

On the other hand, the CPU 311 of the machine side control unit 31
Reads the operation content code corresponding to the operation content switch (for example, code “02” when the operation content is the above-described composite operation, for example, code “02”) from the operation content code storage unit 315 when the line connection is confirmed, and stores the data storage address. Part 31
6 sequentially accesses the address specified for the code and sequentially collects the data stored at the address. When the data collection for all the specified addresses is completed, the data to be transmitted is synthesized. And the combined data is transmitted to the management unit side control unit 21 via the communication controller 34.
Send to FIG. 5 shows a data group transmitted from the machine side control unit 31 to the management unit side control unit 21 in this manner.

This data group includes a serial number (data group number assigned in the order of transmission) D ₁ , an operation content code (in this case, “02” representing the above-mentioned composite operation) D ₂ , an operation end flag (the operation end switch). It becomes “1” when it is ON) D ₃ ,
Each sensor or switch state data D ₄ , time data (data T) D ₅ , and data group end flag (EO
D) is composed of D _6. The transmission of this data group is performed for each serial number, but it is not always necessary to transmit the data group for each serial number, and data for one operation content can be transmitted collectively. The time data is the time indicated by the clock 314 at the time of data collection. or,
FIG. 5 also shows a data group in another operation (operation content code “03”).

On the other hand, the CPU 211 of the management section control section 21
Waits for transmission of data from the machine-side control unit 31, and when data is transmitted, sequentially inputs and temporarily stores each data of the data group until a data group end flag (EOD) of the data group is transmitted. The data group end flag (EO
When D) is confirmed, the data group of this serial number is stored in the data storage unit 214, and it is determined whether transmission of all data in one operation is completed by referring to the operation end flag of the stored data group. . When such processing is continued and the operation end flag becomes “1” and it is determined that transmission of all data of the operation has been completed, the CPU 211 outputs the data stored in the data storage unit 214 to the display unit 24. And display it. In this case, CPU 211 reads the operation switch number corresponding the operation content code storage unit 215 in the operation content code is data D _2, and converts the number word indicating the operation content, for example the "boom raising, turning". Note that the above display may be performed after an instruction from a maintenance person, or may be performed every time one data group is received.

FIG. 6 shows an example of the display. In the figure,
Reference numeral 240 denotes a display screen of the display unit 24. According to the above example, the operation content of the excavator "boom raising and turning" is first shown, and the "serial number", "operation start / end state", and "pump discharge" transmitted from left to right are displayed below the content. "Pressure" data, "engine speed" data, "pressure switch" state,..., "Pump tilt angle" data. In this way, data collection for one operation is completed, and when another operation is required, the above processing is repeated.

As described above, in this embodiment, the operator notifies the management side of the operation contents by the operation contents switch, so that the maintenance person on the management side can accurately grasp the operation contents of the machine. , Accurate data for maintenance can be obtained. Further, since the operation of the work machine is performed by an operator or a maintenance person, there is no danger as in the automatic operation. Further, the maintenance diagnosis can be performed more precisely by using the time data.

In the above embodiment, an example has been described in which operation time data is added to transmission data. However, it is not always necessary to add operation time data.

[0023]

As described above, according to the present invention, the work machine is provided with operation content signal output means for outputting a signal indicating the content of the operation executed by the work machine, and the signal indicating the operation content and the data collection are provided. Since the data collected by the means are combined and sent to the management unit, the maintenance staff on the management side
The operation contents of the machine can be accurately grasped, and accurate data for maintenance can be obtained. Further, since the operation of the work machine is performed by an operator or a maintenance person, there is no danger as in the automatic operation. Further, the maintenance diagnosis can be performed more precisely by using the time data.

[Brief description of the drawings]

FIG. 1 is a block diagram of a maintenance system for a work machine according to an embodiment of the present invention.

FIG. 2 is a side view of a hydraulic shovel as a working machine.

FIG. 3 is a perspective view of an operation content switch group and an operation end switch of the machine-side maintenance device.

FIG. 4 is a diagram showing a reference table stored in an operation content instruction code storage unit and a data storage address storage unit shown in FIG. 1;

FIG. 5 is a configuration diagram of data transmitted from a machine to a management unit.

FIG. 6 is a diagram showing data displayed on a display unit.

FIG. 7 is a circuit diagram of a part of a hydraulic circuit of the work machine.

[Description of Signs] 20 Management unit-side maintenance device 21 Management unit-side control unit 24 Display unit 23, 34 Communication controller 30 Machine-side maintenance device 31 Machine-side control unit 32 Operation content switch group 33 Operation end switch 40 Operation controller

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yutaka Watanabe 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory

Claims (3)

[Claims] 1. A work machine, comprising: a data collection means for collecting data on a state of each part constituting the work machine; a work machine-side data storage means for storing data collected by the data collection means; A work machine-side transmitting / receiving means for transmitting / receiving data, and a managing unit for maintaining / maintaining the work machine, a managing unit-side transmitting / receiving means for transmitting / receiving data to / from the outside, the work machine-side transmitting / receiving means and the management In a maintenance system for a work machine provided with a management unit side data storage unit for storing data input via a unit side transmission / reception unit, a signal indicating an operation content executed by the work machine is output to the work machine. An operation content signal output unit, and a data transmission unit that combines the data collected by the data collection unit and the signal according to the operation content and transmits the combined signal to the management unit. A maintenance system for a working machine, wherein the maintenance system is provided. 2. The maintenance system for a work machine according to claim 1, wherein said operation content signal output means is each switch provided corresponding to each operation content of the work machine. 3. The maintenance system for a work machine according to claim 1, wherein operation time data is added to the combined data.