JPH07189295A - Data collection system of movable work machine - Google Patents

Abstract

PURPOSE:To make it possible to perform an efficient maintenance control CONSTITUTION:A data collection car 1 transmits data request quest signals from an antenna 14 while it is running. When a work machine existing near the data collection car 1 receives the data request signals, a receiver and transmitter installed to a control unit of the work machine transmit specified data about a working state by way of the antenna. The data is input into a computer by way of the antenna 14 of the data collection car 1 and the receiver/ transmitter 13 and a transmission controller 12 and the data is stored in a memory unit 15. The collected data of each work machine is analyzed in terms of supervision failure by a section in charge of the work machines. When data is transmitted from the work machine side on a regular basis, there is no need for the data request signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection system for a mobile work machine that collects data relating to the operating state of a work machine such as a hydraulic excavator, a crane, a bulldozer, etc., which carries out work.

[0002]

2. Description of the Related Art Generally, a working machine is often used in a harsh condition, and each part of the machine is heavily worn. Especially in Japan, where the country is small, there is a lot of work to dismantle the existing building and rebuild it.In this case, it is necessary to complete the work in a short period of time in consideration of the surrounding environment, etc. It is carried out and the wear of the machine is remarkable. Therefore, appropriate maintenance management is required for these work machines. Since this maintenance requires highly specialized knowledge, the work machine manufacturer usually performs maintenance management.

Conventional maintenance management is disclosed in, for example, Japanese Patent Laid-Open No. 2-27.
As disclosed in Japanese Patent Publication No. 0653, a working machine is equipped with an engine-related diagnostic device including various sensors and a hydraulic pump-related diagnostic device, and when a maintenance person performs maintenance on the working machine, the worker is dispatched to a work site. Is operated to record the data from each of the above-mentioned diagnostic devices in the IC card via the controller and the data writing device, and the various data thus recorded are analyzed by the analyzing device to detect an abnormality of the engine or the hydraulic pump. It was done by doing.

[0004]

The working machine described above does not have high moving performance like general passenger cars and freight cars, and can work in a limited area (for example, in one prefecture). Many. For this reason, the maintenance and management of the work machine is usually carried out by a management department (management section) having jurisdiction over the area, for example, a branch or a sales office of the work machine manufacturer that sells the work machine. By the way, the work site of the work machine is often moved constantly due to work reasons or changes in the work plan, and maintenance personnel perform maintenance. Often, even if the worker goes to the work site, the work machine does not exist there. Further, since the jurisdiction area of one management unit is usually quite large, the maintenance efficiency will be significantly reduced when the maintenance staff is wasted at the work site. Further, even if the maintenance staff can capture the work machine at the work site, if the work machine is in operation, the work must be stopped for inspection or wait until the work is completed. In the former case, useless time is generated on the working machine side, and in the latter case, useless time is generated on the maintenance person side, which is extremely inconvenient.

An object of the present invention is to provide a data collection system for a mobile work machine that solves the above problems in the prior art and enables efficient maintenance management.

[0006]

In order to achieve the above-mentioned object, the present invention provides a mobile work machine equipped with a storage unit for storing predetermined data relating to an operating state. The transmitting / receiving means for transmitting / receiving the stored data and the command from the outside through the antenna is provided, and other transmitting / receiving means for transmitting / receiving via the antenna to / from the transmitting / receiving means and the data received by the other transmitting / receiving means. And a data collection vehicle having another storage unit for storing the data. When the data collection vehicle passes near the mobile work machine, the data transmitted from the mobile work machine is collected in the other storage unit. It is characterized by

[0007]

The working machine transmits predetermined data out of the data of its own working state stored in the storage unit to the outside through the antenna at all times or when the data request signal is received. On the other hand, the data collection vehicle travels so as to collect data from the work machine via the antenna and stores the collected data in the storage unit. Thereby, the data transmitted from the work machine existing within the reception range is automatically collected in the storage unit of the data collection vehicle.

[0008]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a side view of a schematic configuration of a data collection vehicle used in a mobile work machine management system according to an embodiment of the present invention. In this figure, 1 indicates a data collection vehicle. The data collection vehicle 1 includes a computer 11, a communication controller 12, a transceiver 13, an antenna 14, and a storage unit 15.
Is installed.

FIG. 2 is a side view of a hydraulic excavator which is a working machine. In FIG. 2, 2 indicates a hydraulic excavator. 20 is an undercarriage traveling by a hydraulic motor, 21 is an engine,
An upper revolving structure in which a hydraulic pump, hydraulic piping, a power supply battery, a driver's cab 211, etc. are installed, and 22 is a front mechanism including a boom 221, an arm 222, and a bucket 223. Reference numeral 23 is a control unit installed in the cab 211, and 24 is an antenna provided on the roof of the cab 211.

FIG. 3 is a control section 2 of the hydraulic excavator shown in FIG.
3 is a block diagram of FIG. The control unit 23 controls the drive of the hydraulic excavator, an operation controller 231 that collects data detected by various sensors and measuring instruments provided in the hydraulic excavator, a storage unit 232 that stores the collected data, and a data transfer It is composed of a communication controller 233 for controlling, a wireless transceiver (wireless communication device) 234, and a data extraction instruction section 235 for instructing setting of data to be transmitted to the outside. Reference numeral 24 is an antenna of the transceiver 234 (the same as that shown in FIG. 2).

FIG. 4 shows the operation controller 231 shown in FIG.
It is a figure which shows the outline of the program of. As shown in this figure, the program is composed of a timer process, a main process, and a communication process. In the timer process, A / D conversion input, hydraulic pump data input, output to a solenoid valve, etc. are performed, and in the main process, , Switch input judgment, control condition setting,
The control target value is calculated, the failure is determined, the operation data is recorded and determined, the error code is recorded, and the like. In the communication process, the communication controller 233 is controlled to communicate with the outside. These processes are performed in parallel, and the main process is performed between the timer process and the communication process.

The data stored in the storage unit 232 will be described below with reference to FIGS. Hour meter; data for checking the ON time of the engine key switch, that is, the operating time of the hydraulic excavator 5, and the most important data for maintenance management. ON / OFF of engine key switch; this ON / OF
The cumulative operating time as shown in FIG. 5 can be grasped from the number of times of F. Furthermore, the operating hours can be grasped. In FIG. 5, the horizontal axis indicates the elapsed time from the start of use,
The vertical axis shows the cumulative operating time with respect to the elapsed time. Stress: data obtained by detecting a stress at a predetermined location of the hydraulic excavator 5 with a strain gauge, and checking the magnitude of fatigue at the predetermined location to prevent breakage or the like. This stress data is data represented as the number of times each stress value occurs. This is shown in FIG. FIG. 6 is a stress frequency distribution chart, in which the horizontal axis represents the number of times each log is generated (log) and the vertical axis represents the magnitude of each stress. For example, the number of times the stress P is generated at a predetermined location is N, and the number of times the stress P is generated is the curve B (S-
If it exceeds N curve, it is judged that the fatigue limit is exceeded. Number of strokes of the operating lever; data used for analysis of work contents such as traveling frequency and number of bucket operations. The engine speed, the tilt angle of the hydraulic pump, the discharge pressure; the discharge amount per one rotation is calculated from the tilt angle, the flow rate is calculated by the product of the engine speed, and is multiplied by the discharge pressure. The required horsepower is required. If it is known that the hydraulic excavator 5 is used with a certain horsepower, various set values can be set to appropriate values in consideration of efficiency, operability, fuel consumption, and the like. Temperature of hydraulic oil: Used for monitoring oil deterioration and checking heat balance of coolers. Fuel amount; Fuel consumption per unit time and remaining amount of fuel are known. ON / OFF of various operation mode switches; it is possible to grasp how the hydraulic excavator 5 is used. There are various types of data other than the above, but description thereof will be omitted.

Next, the operation of this embodiment will be described. The data collection vehicle 1 is usually placed in the management section. The data collection vehicle 1 is used when the staff of the management department goes to the destination for some reason. Prior to departure, the clerk inputs to the computer 11 a command for transmitting a data request signal requesting the work machine to transmit data. Based on this command, the computer 11 transmits a data request signal to the outside via the communication controller 12, the transceiver 13, and the antenna 14. In this state, when the data collection vehicle 1 is traveling toward the destination and the work machine is within the transmission / reception range of the transceiver 13, the data request signal from the data collection vehicle 1 is It is input to the operation controller 231 via the antenna 24 of the machine, the transceiver 234, and the communication controller 233.

With this input, the operation controller 231 extracts the data instructed by the data extraction instructing section 235 from among the respective data stored in the storage section 232.
The number of its own working machine is attached to this data, and this is transmitted to the outside via the communication controller 233, the transceiver 234 and the antenna 24. The data transmitted in this manner is received by the antenna 14 of the data collection vehicle 1, input to the computer 11 via the transceiver 13 and the communication controller 12, and stored in the storage unit 15. When the data collection vehicle 1 returns to the management unit, the clerk retrieves the data from the storage unit 15 and inputs the data into a predetermined device provided in the management unit to perform management analysis and failure diagnosis. In addition,
The bidirectional transmitting / receiving means for transmitting / receiving the data request signal and the data of the working machine is a well-known means in the telecommunications technology, and therefore its explanation is omitted. In addition, the data extraction instruction unit 23
In 5, the above-mentioned various data or data selected from them is designated, but at least one of the operating time, the presence / absence of abnormality, and the presence / absence of operation of the power source is always selected.

With this configuration, in the present embodiment,
Even if you do not go to a hydraulic excavator or other work machine whose location is not clear, or you do not stop the work of these work machines, the data of many work machines is automatically and
The data can be collected in a short time, and as a result, the work machine can be efficiently managed. And the transceiver 1
It is obvious that the wider the communicable range of 3, 234 and the longer the traveling distance of the data collection vehicle 1, the more work machines can be grasped by one traveling.

In the above description of the embodiment, an example in which the data collection vehicle travels while transmitting a data request signal has been described, but the present invention is not limited to this, and the work machine always outputs data. You may make it collect this with a data collection vehicle. In the description of the above embodiment,
Although the data collection vehicle has been described as an example having a function of simply collecting data, it is possible to add various analysis and failure judgment functions to the installed computer, and in this case, it is stored in the management unit. When passing the vicinity of the work machine in which a problem may occur from the stored data, the above analysis and judgment can be performed, and appropriate action can be taken according to the result.

[0017]

As described above, according to the present invention, the mobile work machine is provided with the transmitting / receiving means for transmitting / receiving the data stored in the storage portion and the command from the outside through the antenna, and the transmitting / receiving means. A data collection vehicle equipped with a transmission / reception means for performing transmission / reception via an antenna and a storage section for storing data received by the transmission / reception means, and when the data collection vehicle passes near a mobile work machine, the movement is performed. Since the data transmitted from the work machine is collected in the storage unit of the data collection vehicle, even if the work machine whose location is not clear does not go to the work machine or the work of the work machine is not stopped, many Data of the work machine can be automatically collected in a short time, and as a result, the work machine can be efficiently managed.

[Brief description of drawings]

FIG. 1 is a side view of a data collection vehicle used in a data collection system for a mobile work machine according to an embodiment of the present invention.

FIG. 2 is a side view of a hydraulic excavator that is a working machine.

FIG. 3 is a block diagram of a control unit shown in FIG.

FIG. 4 is a diagram showing an outline of a process of driving control shown in FIG.

FIG. 5 is a graph showing cumulative operating time.

FIG. 6 is a graph showing a stress frequency distribution.

[Explanation of symbols]

 1 Data Collection Vehicle 11 Computer 12 Communication Controller 13 Transmitter / Receiver 14 Antenna 15 Storage Unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Murayama 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory

Claims (4)

[Claims] 1. A mobile work machine including a storage section for storing predetermined data relating to an operating state, wherein data stored in the storage section and an external command are transmitted to and received from the mobile work machine via an antenna. A data collection vehicle is provided which is provided with a transmission / reception means and is provided with another transmission / reception means for transmitting / receiving to / from this transmission / reception means via an antenna and another storage section for storing data received by the other transmission / reception means. A data collection system for a mobile work machine, wherein when the data collection vehicle passes near the mobile work machine, the data transmitted from the mobile work machine is collected in the other storage unit. 2. The data of the mobile work machine according to claim 1, wherein the data transmitted from the transmitting / receiving means of the mobile work machine is transmitted when a data request signal from the data collecting vehicle is received. Collection system. 3. The data collection system for a mobile work machine according to claim 1, wherein the data transmitted from the transmitting / receiving means of the mobile work machine is constantly transmitted. 4. The data transmitted from the transmitting / receiving means of the mobile work machine according to claim 1, wherein the data is an operating time of the mobile work machine, presence / absence of an abnormality occurring in the mobile work machine,
And at least one of the presence or absence of operation of a power source of the mobile work machine.