JP3635173B2 - Work machine maintenance system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a work machine maintenance system for performing required maintenance on work machines such as excavators, cranes, and bulldozers.
[0002]
[Prior art]
In general, work machines are often used in harsh conditions, and wear on each part of the machine is severe. For this reason, appropriate maintenance management is required for these work machines. Since this maintenance management requires highly specialized knowledge, the work machine manufacturer usually performs maintenance management. In conventional maintenance management, maintenance personnel are dispatched to the work site of the work machine to be maintained, operate the work machine, and data obtained by various sensors provided at the required locations of the work machine is written to the controller and data. Recording is performed on an IC card through a device, and various data recorded in this manner are analyzed by an analysis device to detect an abnormality of the work machine or its sign. An installation example of the various sensors is shown in FIG.
[0003]
FIG. 7 is a circuit diagram of a part of the hydraulic circuit of the work machine. In this figure, 1 is the engine, 1a is the governor lever of the engine 1, 2 is the hydraulic pump, 2a is the variable displacement mechanism of the hydraulic pump 1, 3 is the pilot pump, 4 is the hydraulic cylinder, 5 is the hydraulic pump 2 and the hydraulic cylinder 4 , A pilot valve for operating the flow control valve 5, 6 a an operation lever for the pilot valve 6, and 7 a hydraulic oil tank. When the operator operates the operation lever 6a in either direction, the flow control valve 5 is displaced according to the operation direction, and the hydraulic oil of the hydraulic pump 2 is supplied to the hydraulic cylinder 4 to drive it. As a result, the working unit is driven to perform the required work. In the figure, 8 and 9 are pressure switches for detecting the operating direction of the operating lever 6a, 10 is an angle sensor for detecting the amount of displacement of the governor lever 1a, 11 is a rotational speed sensor for detecting the rotational speed of the engine 1, and 13 is a hydraulic pump. 1 is a pressure sensor that detects the discharge pressure of 1, and 14 is a temperature sensor that detects the temperature of the hydraulic oil tank 7. Although not shown, a sensor for detecting the driving amount (angle) of the working unit is provided.
[0004]
By the way, the work site of the work machine is constantly moving for convenience of work or due to changes in the work plan, etc., and maintenance is performed by maintenance personnel. Even when a working machine is visited, the situation that the working machine does not exist often occurs. In this case, the maintenance worker is seconded to the work site, and the maintenance efficiency is remarkably lowered. Further, when the work site is located in a relatively remote place such as a mine or a quarry, it takes a long time just for the maintenance staff to visit the work site, and similarly, the work efficiency is remarkably deteriorated.
[0005]
In order to deal with such a situation, for example, in Japanese Patent Laid-Open No. 7-166582, a maintenance staff is allowed to perform wireless communication between a management unit and a work machine, and the maintenance staff requests an operator of the work machine. Then, the work machine is operated in a required manner, or a maintenance worker remotely operates the work machine in a required manner, receives data of various sensors obtained as a result of the operation, and based on the received data Means for diagnosing work machines are presented.
[0006]
[Problems to be solved by the invention]
However, the work site is usually noisy and the radio wave condition is poor, and it is often difficult for maintenance personnel to tell the operator how to operate in the required manner, and it is often difficult to convey this. Automatic operation of the machine has a problem that some measures must be taken in advance so that an accident does not occur, and it takes time and effort, and even if such measures are taken, it is still not completely safe. .
[0007]
The object of the present invention is to solve the above-mentioned problems in the prior art, and to inform the management section of the details of the operation at the work site, and thus to maintain the work machine capable of reliably diagnosing the work machine. To provide a system.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a work machine side data storage means for capturing and storing data indicating the state of each part constituting the work machine, and work for exchanging data with the outside. A management-side transmission / reception means for transmitting / receiving data to / from the outside, a work-machine-side transmission / reception means, and a management-unit-side transmission / reception means. In the work machine maintenance system comprising a management unit side data storage means for storing the input data, a plurality of operation content signals indicating various operation contents executed by the work machine are respectively output to the work machine . the operation content signal output means with Keru set, keep predetermined data to be collected from the working machine side data storage means in response to their various operation contents, the When a predetermined operation content is executed by the work machine by operating any of the plurality of operation content signal output means on the industrial machine side, the data predetermined corresponding to the operation content is stored in the work Collected from the machine-side data storage means, and sends the collected data together with the operation content signal output from the operated operation content signal output means to the management-unit-side transmission / reception means and stores it in the management-unit-side data storage means The collected data is displayed on the display means on the management unit side together with the operation content executed by the work machine .
In the maintenance system for work machines, the present invention is characterized in that operation time data is further displayed on the display means on the management unit side .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on the illustrated embodiments.
FIG. 1 is a block diagram of a work machine maintenance system 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 staff. The management unit side control unit 21, a display unit 22, a communication controller 23 (including a transceiver), and an antenna 23a thereof. It has. The management unit side control unit 21 includes a central processing unit (CPU) 211, a read only memory (ROM) 212 for storing the processing procedure of the CPU 211, a random access memory (RAM) 213 for storing results of arithmetic control, and the like from the work machine The data storage unit 214 stores the transmitted data, the operation content code storage unit 215 (described later), and the input / output interface 216.
[0010]
Reference numeral 30 denotes a machine-side maintenance device provided in the work machine. The machine-side control unit 31, an operation content switch group 32 (described later), an operation end switch 33 (described later), a communication controller 34 (including a transceiver), and its antenna 34a is provided. The machine-side control unit 31 includes a central processing unit (CPU) 311, a read only memory (ROM) 312 that stores processing procedures of the CPU 311, a random access memory (RAM) 313 that stores results of arithmetic control, a clock 314, an operation A content code storage unit 315 (described later), a data storage address storage unit 316 (described later), and an input / output interface 317 are configured.
[0011]
Reference numeral 40 denotes an operation controller for performing various controls of the work machine, and is constituted by a microcomputer. The operation controller 40 takes in the detection values of various sensors provided in the work machine and the states of the various switches and stores them at predetermined addresses in the storage unit. Based on the detection values and the state of the switches, the operation controller 40 For example, horizontal excavation control of a hydraulic excavator.
[0012]
FIG. 2 is a side view of a hydraulic excavator that is 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 that is turnably provided on the lower traveling body 51, 52 a is a cab arranged in the upper revolving body 52, 53 Is a boom, 54 is an arm, and 55 is a bucket. Although not shown, angle sensors are attached to the rotation centers of the boom 53, the arm 54, and the bucket 55, and the detected values of these angle sensors are also stored in the storage unit of the operation controller 40 as the boom angle, arm angle, and bucket angle. Stored at a predetermined address. Reference numeral 30 denotes a machine-side maintenance apparatus shown in FIG. 1 and is provided in the cab 52a. Reference numeral 34a denotes the antenna shown in FIG.
[0013]
FIG. 3 is a perspective view of an operation content switch group and an operation end switch of the machine-side maintenance apparatus. In this figure, reference numeral 32 denotes an operation content switch group shown in FIG. 1, and includes operation content switches 32a, 32b, and 32c. Each operation content switch is numbered, but illustration thereof is omitted. The operation content switches 32a, 32b, and 32c are, for example, that a “boom raising single operation”, “a combined operation of boom raising and turning of the upper-part turning body”, and “traveling single operation” are performed with a hydraulic excavator, respectively. Used for notification. Although the required number of operation content switches is provided, other operation content switches are not shown in the figure. Further, although operation contents are displayed for each operation content switch, illustration of these displays is also omitted. Reference numeral 33 denotes an operation end switch shown in FIG. 1 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 control unit 31 can be stored in the case 300, and the communication controller 36 can be stored in the case 300.
[0014]
FIG. 4 is a diagram for explaining the contents of the comparison table and the data storage address storage unit 316 stored in the operation content code storage units 215 and 315 shown in FIG. FIG. 4A shows a comparison table stored in the operation content code storage units 215 and 315 , and associates each number of each operation content switch in the operation content switch group 32 with the corresponding operation content code. Is. The contents stored in the operation content code storage unit 215 of the management-side maintenance device 20 are identical to the contents of the operation content code stored in the storage unit 315 of the machine-side maintenance device 30, the management unit of the management-side maintenance device 20 The side control unit 21 is further provided with conversion means for converting into characters such as “Boom Lifting Single Operation” corresponding to the number of each operation content switch.
[0015]
FIG. 4B shows a comparison table stored in the data storage address storage unit 316 , which includes an operation content code and an address corresponding thereto (address of the storage unit 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 (b) of FIG. 4, an address in which the data to be collected in advance is stored for each operation content. Therefore, in most cases, a plurality of addresses are associated with one operation content.
[0016]
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 arranged in the management unit side maintenance device 20, and an operator or a maintenance person (represented by the operator) is arranged in the work machine. When periodic maintenance is performed or when maintenance diagnosis of the work machine is necessary for some reason, there is a request for data collection from the management unit side to the work machine side or from the work machine side to the management unit side. Next, the management unit side 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 (the operation content switch 32b in this example) corresponding to the operation content he / she intends to perform on the work machine, for example, “combined operation of raising the boom and turning the upper swing body”. Start the operation of the work machine. When this operation ends, the operator turns on the operation end switch 33.
[0017]
On the other hand, when the CPU 311 of the machine side control unit 31 confirms the line connection, the operation content code corresponding to the operation content switch (for example, the code “02” when the operation content is the above composite operation, for example), that is, executed by the work machine The code related to the operation content to be read is read from the operation content code storage unit 315, and the data storage address storage unit 316 sequentially accesses the address of the storage unit in the operation controller 40 determined for the code, and is stored at that address. Are sequentially collected, and predetermined data corresponding to the operation content is collected from the storage unit of the operation controller 40. In this way, when the collection of the data of all the addresses to be transmitted is completed, the data to be transmitted is processed so that it can be transmitted as one group, and the operation contents indicating the operation contents are processed with such a group of data. Along with the signal related to the operation content code as a signal, the signal is transmitted to the management unit side control unit 21 via the communication controller 34. A data group transmitted from the machine side control unit 31 to the management unit side control unit 21 in this manner is shown in FIG.
[0018]
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” indicating the above composite operation) D ₂ , an operation end flag (when the operation end switch is turned “ 1 ”) D ₃ , each sensor and switch state data D ₄ , time data (data T) D ₅ , and data group end flag (EOD) D ₆ . Although the transmission of this data group is executed for each serial number, it is not always necessary to transmit for each serial number, and data for one operation content can be transmitted together. The time data is the time indicated by the clock 314 at the time of data collection. FIG. 5 also shows a data group in another operation (operation content code “03”).
[0019]
On the other hand, the CPU 211 of the management unit side control unit 21 waits for data transmission from the machine side control unit 31, and when there is data transmission, each data of the data group is transmitted by the data group end flag (EOD) of the data group. Until the data group end flag (EOD) is confirmed, the data group of this serial number is stored in the data storage unit 214, and the operation end flag of the stored data group is set. Thus, it is determined whether or not transmission of all data in one operation is completed. 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 ended, the CPU 211 outputs the data stored in the data storage unit 214 to the display unit 22 . To display. In this case, the CPU 211 reads the operation switch number corresponding to the operation content code which is the data D2 from the operation content code storage unit 215, converts this number into a word indicating the operation content, for example, “boom up, turning” , Data collected from the storage unit of the operation controller 40 is displayed together with a word indicating the operation content. The display may be performed after an instruction from the maintenance staff or may be performed every time one data group is received.
[0020]
An example of the display is shown in FIG. In the figure, 240 indicates a display screen of the display unit 22 . According to the previous example, the operation contents of the excavator “boom raising and turning” are shown first, and the transmitted “serial number”, “operation start / end state”, “pump discharge” are displayed in order from the left. "Pressure" data, "Engine speed" data, "Pressure switch" status, ..., "Pump tilt angle" data are displayed. In this way, data collection for one operation is completed, and when another operation is necessary, the above processing is repeated again.
[0021]
As described above, in this embodiment, since the operator notifies the management side of the operation content by the operation content switch, the maintenance person on the management side can accurately grasp the operation content of the machine, Accurate data can be obtained. Moreover, since the operation of the work machine is performed by an operator or maintenance personnel, there is no danger as in automatic operation. Furthermore, maintenance diagnosis can be performed more precisely by using time data.
[0022]
In the above description of the embodiment, the example in which the operation time data is added to the transmission data has been described. However, the operation time data is not necessarily added.
[0023]
【The invention's effect】
As described above, in the present invention, the work machine, with Keru setting a plurality of operation contents signal output means for outputting an operation content signal representing various contents of operations the work machine runs, respectively, in their various operation contents Correspondingly, data to be collected from the work machine side data storage means is determined in advance, and the work machine side operates any one of the plurality of operation content signal output means, and the predetermined operation content is obtained by the work machine. When executed, the predetermined data corresponding to the operation content is collected from the work machine side data storage means, and the collected data is output from the operated operation content signal output means. The operation content signal is transmitted to the management unit side transmission / reception unit and stored in the management unit side data storage unit, and the collected data is used as the operation content executed by the work machine. And then, is displayed on the display means of the manager side by the management side of the maintenance personnel can accurately grasp the operation contents of the machine, accurate data for maintenance can be obtained. Moreover, since the operation of the work machine is performed by an operator or maintenance personnel, there is no danger as in automatic operation. Furthermore, maintenance diagnosis can be performed more precisely by displaying the time data on the display means on the management unit side .
[Brief description of the drawings]
FIG. 1 is a block diagram of a work machine maintenance system according to an embodiment of the present invention.
FIG. 2 is a side view of a hydraulic excavator that is a work machine.
FIG. 3 is a perspective view of an operation content switch group and an operation end switch of the machine-side maintenance device.
4 is a diagram showing a comparison table stored in the operation content instruction code storage unit and the data storage address storage unit shown in FIG. 1; FIG.
FIG. 5 is a configuration diagram of data transmitted from the machine side to the management unit side.
FIG. 6 is a diagram illustrating data displayed on a display unit.
FIG. 7 is a circuit diagram of a part of a hydraulic circuit of the work machine.
[Explanation of symbols]
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

Claims (3)

The work machine includes a work machine-side data storage unit that captures and stores data indicating the state of each part of the work machine, and a work machine-side transmission / reception unit that exchanges data with the outside. Management unit side transmission / reception means for exchanging data with the outside, and management unit side data for storing data input via the work machine side transmission / reception means and the management unit side transmission / reception means In a work machine maintenance system comprising a storage means,
Wherein the working machine, with Keru setting a plurality of operation contents signal output means for outputting an operation content signal representing various contents of operations the work machine to perform each of the working machine side data stored corresponding to their various operation contents The operation content is determined when predetermined data is executed by the work machine by operating one of the plurality of operation content signal output means on the work machine side in advance. The predetermined data corresponding to the data is collected from the work machine side data storage means, and the collected data is transmitted and received along with the operation content signal output from the operated operation content signal output means. To the management unit side data storage unit, and the collected data is displayed on the management unit side together with the operation content executed by the work machine. Working machine maintenance system characterized by being configured to display on.   2. The work machine maintenance system according to claim 1, wherein the operation content signal output means is a switch provided corresponding to each operation content of the work machine. 2. The work machine maintenance system according to claim 1, wherein operation time data is further displayed on the display unit on the management unit side .

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