JPH10168946A - Monitoring equipment for mobile work machines - Google Patents

Abstract

(57) [Problem] To provide a monitoring device for a mobile work machine, which can detect in advance a malfunction before an engine system failure occurs. An accelerator sensor, a governor sensor,
An engine control means 3 for inputting each detection data obtained from the engine speed sensor 14 and performing arithmetic processing to obtain an engine control command value; and inputting each of the detection data including the engine control command value and performing predetermined arithmetic processing In the monitoring apparatus for a mobile work machine, the data collection unit 4 includes: a data collection unit 4 that obtains collected data by performing the operation; and display units 5 and 6 that output and display the collected data. When any one of the detection data satisfies a predetermined condition, together with the detection data, another detection data is simultaneously processed to obtain collected data corresponding to each detection data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for a mobile work machine, and more particularly to a monitoring device for performing maintenance management of an engine system of a mobile work machine such as a hydraulic shovel, a crane, and a bull tozer.

[0002]

2. Description of the Related Art Conventionally, a mobile work machine such as a hydraulic shovel, a crane, a bull tozer, and the like use a sensor and a controller for controlling the mobile work machine. As a means for detecting the above, there is known a control controller provided with a self-diagnosis function. Normally, these self-diagnosis functions are performed when the sensor output exceeds a predetermined value, or when the output of the sensor is increased.
As proposed in Japanese Patent Publication No. 279, when output signals of a plurality of sensors and switches related to each other on a control system do not correspond correctly, that is, it is detected that inconsistency has occurred between the output signals. Means for determining that a failure has occurred in the mobile work machine.

[0003]

However, the means for judging a failure by the self-diagnosis function is useful for estimating the cause at the occurrence of a failure in the engine system. When the number gradually increases, the engine noise is getting higher, fuel consumption is getting worse, or when the engine speed fluctuates periodically during idling or the riding comfort is getting worse, etc. There has been a problem that a malfunction before the failure of the work machine has occurred cannot be found in advance. Also, when the service technician measures and determines whether or not each output signal correctly corresponds from each output signal of a plurality of sensors and the like related to each other on the control system, the control system is not sufficiently familiar with the control system. There was a problem that cannot be determined.

In view of the above problems, the present invention collects data for judging whether or not the engine system is moving smoothly, and outputs the data to a display device or the like so that malfunctions before a failure occurs can be determined in advance. It is an object of the present invention to provide a monitoring device for a mobile work machine that can be found.

[0005]

According to the present invention, at least one of the following objects is attained by inputting detection data obtained from an accelerator sensor, a governor sensor, and an engine speed sensor, and performing arithmetic processing. An engine control means for obtaining an engine control command value for controlling the governor; the detection data obtained from the accelerator sensor, the governor sensor, and the engine speed sensor from the engine control means; and the engine as detection data. A control command value, and a data collecting means for obtaining collected data by performing predetermined arithmetic processing; and a display means for outputting and displaying the collected data. The data collection means determines that any one of the input detection data is a predetermined condition. When satisfied, the with detection data, and obtaining the collected data corresponding to processing other detection data other than the detection data at the same time on the detection data.

Further, the predetermined condition is that any one of the input detection data is continuously in an idling rotation range for a predetermined time.

Further, the collected data is a maximum value, a minimum value, an average value, and frequency distribution data obtained by arithmetically processing each of the detected data for each predetermined cumulative operation time of the mobile work machine. Features.

The display form of the collected data displayed on the display means includes a maximum value, a minimum value, and an average value of each detection data at each of the cumulative operation times, and a frequency distribution at each level of each detection data. And displaying the data.

[0009] Each of the detection data is composed of predetermined detection data and other detection data converted for facilitating the comparison with the predetermined detection data. The display form of the collected data to be displayed is to display the maximum value, the minimum value, and the average value of each detection data at each cumulative operation time on the same display surface, and to display the frequency distribution data at each level of each detection data. It is characterized by displaying.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is an overall configuration diagram of a mobile work machine monitoring apparatus according to the present embodiment.

In FIG. 1, reference numeral 1 denotes a detecting unit for detecting a lever operation of a mobile work machine and an operating state of an engine system.
Reference numeral 1 denotes a lever sensor that determines whether or not an operation lever of a hydraulic shovel is operated, 12 denotes an accelerator sensor that detects a position of an accelerator lever that sets a target engine speed, and 13 denotes a control position of a governor of the engine. The governor sensor 14 is an engine speed sensor for detecting the actual engine speed, and the reference numeral 2 is a throttle motor which is controlled by a throttle motor control signal output from a motor driver and controls a governor (not shown).

3 is an engine control device such as a controller,
31 is an interface provided for inputting detection data from each of the sensors, 32 is a data bus, 33
Is a CPU for performing predetermined calculation processing; 34 is a memory for storing a program for executing predetermined calculation processing in the engine control device 3, control data during calculation, detection data input from various sensors, and the like; An interface 35 is provided for inputting and outputting data between the engine control device 3 and the data collection device. A motor driver 36 is driven by an engine control command value obtained as a result of arithmetic processing.

4 is a data collection device, 41 is an interface provided for inputting and outputting data between the engine control device 3 and the data collection device 4, 42 is a data bus, 43
Denotes a CPU for performing predetermined arithmetic processing, 44 denotes a memory having a primary storage area, a secondary storage area, and a storage area for a conversion coefficient table, and 441 constantly updates various detection data obtained from the engine control device 3. 442 is a secondary storage area for storing collected data obtained by performing arithmetic processing on various types of detection data, 443 is a storage area for a conversion coefficient table used in the arithmetic processing, and 45 is an arithmetic operation. A memory 451 storing a processing program and the like;
Is an arithmetic processing program for performing predetermined arithmetic processing on the various detected data, 46 is a timer provided for measuring the operating time of the mobile work machine, and 47 is a link between the engine control device 4 and the display device. An interface provided for inputting and outputting data between the engine control device 4 and the monitoring device; and 48, an interface provided for inputting and outputting data between the engine control device 4 and the monitoring device. This is a communication device on the data collection device side using a telephone line or the like provided for transmission of data.

A display device 5 is detachably connected to the data collection device 4 and displays collected data in a predetermined display form for analyzing the collected data.

Reference numeral 6 denotes a monitoring device which is transmitted using communication means such as a telephone line and includes display means for analyzing the collected data. Reference numeral 61 denotes a data transmission between the engine control device 4 and the monitoring device 6. This is a communication device on the monitoring device side using a telephone line or the like provided for transmission.

Here, in the operation of the engine control system, in the engine control device 3, the accelerator sensor signal detected from the accelerator sensor 12, which is the target value of the engine speed, matches the governor sensor signal detected from the governor sensor 13. Is determined, and if they do not match, an engine control command value corresponding to the difference is
The throttle driver 2 is controlled by outputting a throttle motor control signal from the motor driver 36, and the governor is adjusted so that the governor sensor signal corresponds to the accelerator sensor signal.

The data collecting device 4 uses the engine control device 3 to detect data obtained from various sensors by the engine control device 3 and control data obtained by arithmetic processing of the engine control device 3 as detection data for a certain period of time. Each of the input detection data is further converted into other detection data except for predetermined detection data in order to facilitate comparison between the detection data, and stored in the primary storage area 441 of the memory 44. Is done. Each of these detection data is used when a predetermined condition is satisfied and a predetermined arithmetic processing program 45 is executed.
1 and is stored in the memory 44 as collected data.
Is stored in the secondary storage area 442.

FIG. 2 is a diagram showing an example of various detection data stored in the primary storage area 441 of the memory 44 of the data collection device 4 shown in FIG.

Reference numeral 4411 denotes a primary storage area in which detection data of an engine speed sensor signal is stored from the engine speed sensor 14 via the engine control device 3, and 4412 is obtained from the accelerator sensor 12 via the engine control device 3. The primary storage area 4413 in which the detected data of the accelerator sensor signal converted so as to be easily compared with the engine speed is stored, and 4413 is obtained from the governor sensor 13 via the engine control device 3 and is easily compared with the engine speed. The primary storage area 4414 in which the detection data of the governor sensor signal converted as described above is stored is processed by the engine control device 3 to obtain the engine control command value input to the motor driver, and is easily compared with the engine speed. This is the primary storage area that is stored as the converted detection data.

Here, the primary storage area 441 is provided separately for each of the detection data 4411 to 4414. The storage areas 1 to N of each detection data are provided at regular intervals, for example, for 0.5 second. Detection data is sequentially input and stored at intervals. When the stored detection data reaches the storage area N, it is updated from the storage area 0 again and stored. n-4, n-3, n-2, n-1, n indicate the state of the storage area in the middle of each input detection data, and n indicates the storage of the latest detection data.

FIG. 3 is a diagram showing an example of various collected data stored in the secondary storage area 442 of the memory 44 of the data collection device 4 shown in FIG.

Reference numerals 442A and 442B represent various types of collected data stored in the secondary storage area for each predetermined cumulative operation time. For example, the secondary storage area 442A stores the accumulated data for 500 hours from the start of the operation of the mobile work machine. The operation time and the secondary storage area 442B represent storage areas of various collected data of the cumulative operation time of the mobile work machine from 500 hours to 1000 hours.

Reference numeral 4421 denotes a storage area of collected data relating to the engine speed obtained by arithmetically processing the detection data of the engine speed sensor signal. Reference numeral 4422 denotes an accelerator lever obtained by arithmetically processing the detection data of the accelerator sensor. A storage area for collected data relating to the governor 4423 is a storage area for collected data relating to the governor obtained by performing arithmetic processing on the detection data of the governor sensor, and 4424 is a collected data relating to the engine control command value obtained by performing arithmetic processing on the engine control command value Represents a storage area. 4421a is a secondary storage area 442
The start time of data collection of A, 4421b also represents the end time of data collection, and 4421c and 4421d are the upper limit value and lower limit value of the detection data stored in the primary storage area, for example, indicating the range of the idling rotation speed. The collection conditions 1 and 2, 4421e for calculating the detection data satisfying the predetermined condition include the detected engine speed at each engine speed level 1, 2,..., M-1, m. The frequency of occurrence of the number is stored. For example, when the engine speed is 1000 rpm to 1050 rpm
Frequency in the range of 20 and engine speed 1050r
Each value, such as an appearance frequency of 32 in the range of pm to 1100 rpm, is stored for each of the engine speed levels 1 to m. Reference numeral 4421f denotes an area for storing the average value of the engine speed from the start to the end of data collection for each predetermined operation time of the mobile work machine, and 4421g denotes the area from the start of data collection for each predetermined operation time of the mobile work machine. Area for storing the minimum value of the engine speed obtained until the end, 44
21h is an area for storing the maximum value of the engine speed obtained from the start to the end of data collection for each predetermined operating time of the mobile work machine, and 4421i is a parity check for checking whether the collected data is correct or not. Represent.

Each secondary storage area 4422, 4423, 44
24, the collected data converted to the engine speed is 2
It is stored in the same form as the next storage area 4421.

FIG. 4 is a conversion coefficient table 443 stored in the memory 44 of the data collection device 4 shown in FIG.
4431 is an accelerator sensor conversion coefficient, 4432 is a governor sensor conversion coefficient, and 4433 is a conversion coefficient of an engine control command value. The conversion coefficient table 443 includes an accelerator sensor, a governor sensor, and an engine control command value so that each detection data obtained from the engine control device 3 by the data collection device 4 can be easily compared with detection data obtained from the engine speed sensor. 4 is a table for storing coefficients for converting each detection data obtained from the above into detection data of an engine speed.

Next, the operation of the data collection device 4 of the present embodiment will be described with reference to the flowcharts shown in FIGS.

First, in step 100, each initial value is set to zero. n is the latest storage area n and x of the detection data of the primary storage area 441 shown in FIG. 2, and x is the arithmetic processing performed by satisfying the collection conditions 1 and 2 among the detection data stored in the primary storage area. The values y1, y2, y3, and y4 that are counted up each time the collected data are obtained are the integrated values of the engine speed, the accelerator sensor value, the governor sensor value, and the engine control command value. In step 101, the data collection device 4 inputs, from the engine control device 3, detection data of an engine speed C 1, an accelerator sensor value C 2, a governor sensor value C 3, and an engine control command value C 4. In step 102,
Using the conversion coefficient table 443 shown in FIG. 4, each detection data of the accelerator sensor value, the governor sensor value, and the engine control command value is converted for comparison with the engine speed, and the acceleration sensor, the governor sensor, and the engine control command value are converted. The respective detection data a2, a3, a4 are obtained. Step 1
03, a1 (= c) obtained up to step 102
1), a2, a3, and a4 are shown in FIG.
The data is stored in the next storage area 441. Next, in step 104, any one of the stored detection data a1 to a4 is detected data that has been continuously detected for a predetermined time, for example, the storage areas n-4 and n-1 shown in FIG. 3, n
It is determined whether or not all of the detection data of −2, n−1, and n satisfy the upper and lower limits of 4421c and 4421d of the collection conditions 1 and 2 shown in FIG. When it is determined as YES, the detection data in the storage area n together with the detection data in the storage area n of the other detection data other than the detection data,
Called for arithmetic processing. Next, step 105
Then, the detected data a1 is compared with the already stored maximum value.
It is stored in the maximum value storage area of the next storage area 4421. Similarly, in steps 107 to 112, other detection data a
The same calculation processing as that of the detection data a1 is performed for the data items 2 to a4.
424 are stored in the maximum value storage area. Next, in step 113, the detected data a1 is compared with the already stored minimum value, and if YES, the detection data a1 is stored in the minimum value storage area of the secondary storage area 4421 in step 114.
Similarly, in steps 115 to 120, the same arithmetic processing as that of the detection data a1 is performed on the other detection data a2 to a4, and the obtained minimum values are stored in the respective secondary storage areas 442.
It is stored in a minimum value storage area of 2 to 4424.

Next, in step 121, x is counted up every time the collected data is obtained by performing the arithmetic processing, so 1 is added, and y1, y2, y3, and y4 are added to the respective integrated values already integrated. Each of the newly detected data a1, a2, a3, and a4 is added to the value. In step 122, the updated integrated values y1, y2, y
3 and y4 are divided by the count value x to calculate the respective average values and store the average values in the average value storage areas of the secondary storage areas 4421 to 4424.

Next, in step 123, each of the detected data a1 to a4 is divided by a predetermined value b1 to b4 to calculate k1 'to k4', respectively. Are rounded to calculate the level values k1 to k4. In step 125, 1 is added to one of the frequency data storage areas 1 to m corresponding to the calculated level values k1 to k4 and stored.
For example, when the engine speed is 1000 rpm to 1050 r
If the frequency of appearance in the pm range is 20, b1 indicates the engine speed range 50 rpm, and the calculated level value k
1 designates an engine speed level that matches any of the engine speed levels 1 to m, adds 1 as an appearance frequency to the specified engine speed level, and stores the frequency data storage area 1 in the secondary storage area 4421. ~ M. The same calculation processing as that of the detection data a1 is performed on the other detection data a2 to a4, and the obtained frequency distribution data is stored in the frequency data storage areas of the secondary storage areas 4422 to 4424.

Next, at step 126, an addition process is performed to perform an arithmetic operation on the storage area n + 1 of the primary storage area 441. At steps 127 and 128, when the arithmetic processing on the storage area n = N is completed, the addition processing is performed again. Storage area n
Calculation processing is performed from = 0.

Next, a display mode for displaying the collected data obtained by the monitoring device for the mobile work machine of the present embodiment on a display device or the like will be described with reference to FIGS.

FIG. 10 shows the maximum value, the average value, and the minimum value of each detection data of the engine speed sensor, the governor sensor, and the engine control command value obtained by converting the engine speed sensor and the engine speed for each cumulative operation time. The horizontal axis represents the cumulative operating time, the vertical axis represents the engine speed, A represents the maximum value, B represents the average value, and C represents the minimum value.

These display data are stored in the secondary storage areas 4421f, 4421g, and 4421h shown in FIG. 4, and the average value, the minimum value, and the maximum value are displayed on the display device 5 as shown in FIG. The state when output and displayed on the display device provided in the display device 6 is shown.

By displaying in this manner, the engine speed, which indicates the state of the engine system for each cumulative operating time,
Accelerator sensor, governor sensor, you can see the time transition of each collected data of engine control command value,
It can be used as determination data for determining whether or not the engine system is moving smoothly.

In particular, in this embodiment, the accelerator sensor,
Since the detection data of the governor sensor and the engine control command value are converted so as to be easily compared with the engine speed, the condition of the engine system can be clearly grasped while comparing the time series.

FIG. 11 is a distribution diagram of frequency data representing the appearance frequency at each level of each detection data obtained from the engine speed sensor, the accelerator sensor, the governor sensor, and the engine control command value. The levels 1 to m of each detection data of the sensor, the engine speed, the governor sensor, and the engine control command value, and the vertical axis represents the appearance frequency of each level of the detection data.

As for these display data, the frequency data 1 to m stored in the secondary storage area 4421e shown in FIG.
5 shows a state when the data is output and displayed on the display device 5 or the display device provided in the monitoring device 6 as shown in FIG.

By displaying in this manner, the engine speed indicating the state of the engine system for each cumulative operation time,
The appearance frequency of each level of the detected data of the accelerator sensor, the governor sensor, and the engine control command value can be seen at each level, and can be used as the data for determining whether the engine system is moving smoothly.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

FIG. 12 is an overall configuration diagram of a monitoring device for a mobile work machine according to the present embodiment.

In the figure, reference numeral 44 denotes a memory having a primary storage area 441 and a secondary storage area 442, which is different from the first embodiment in that a conversion coefficient table used for arithmetic processing is not provided. The other configuration is the same as that shown in FIG. 1 and the description is omitted.

FIG. 13 shows the data collection device 4 shown in FIG.
4 is a diagram showing an example of various types of detection data stored in a primary storage area 441 of a memory 44 of FIG.

Reference numeral 4411 denotes a primary storage area in which detection data of the engine speed sensor signal is stored from the engine speed sensor 14 via the engine control device 3, and 4412 is obtained from the governor sensor 13 via the engine control device 3. A primary storage area in which the detection data of the governor sensor signal is stored, 4413 is a primary storage area in which detection data of the accelerator sensor signal obtained from the accelerator sensor 12 via the engine control device 3 is stored, and 4414 is an engine control device 3 In the first embodiment, a primary storage area for obtaining an engine control command value calculated and output and storing it as detection data. In the first embodiment, a governor sensor, an accelerator sensor, and an engine control command value. Detection data is easy to compare with detection data obtained from the engine speed sensor With the difference that has not been conversion processing on it had been converted processed as.

FIG. 14 shows the data collection device 4 shown in FIG.
5 is a diagram showing an example of various collected data stored in a secondary storage area 442 of the memory 44 of FIG.
The collected data stored in the frequency data storage area 4421e, the average value storage area 4421f, the minimum value storage area 4421g, and the maximum value storage area 4421h of 2 to 4424 are easily compared with the detection data detected from the engine speed sensor. The first embodiment differs from the first embodiment in that it is not converted as described above. Other points are the same as those shown in FIG.

Next, the operation of the data collection device 4 of this embodiment will be described with reference to the flowchart shown in FIG.

In the first embodiment, in step 102, the values of the accelerator sensor value, the governor sensor value, and the engine control command value are easily compared with the engine speed from the conversion coefficient table 443 shown in FIG. To obtain detection data a2, a3, and a4. However, in this embodiment, since conversion processing is not performed, in step 103, a1 = c1, a2 = c2, a3 = c3, and a4 =
c4. The following processing procedure is almost the same as that of the first embodiment, and the description is omitted.

As described above, in the present embodiment, since a conversion coefficient table and a conversion process are not required, collected data can be obtained by simple arithmetic processing as compared with the first embodiment.

Next, a display form in which the collected data obtained by the monitoring apparatus for the mobile work machine of the present embodiment is displayed on a display device or the like will be described with reference to FIGS.

FIG. 15 is a diagram showing the distribution of the maximum value, the average value, and the minimum value of the data detected by the engine speed sensor for each cumulative operation time. The horizontal axis indicates the cumulative operation time, and the vertical axis indicates the engine speed. The number, A represents the maximum value, B represents the average value, and C represents the minimum value.

These display data correspond to the average value, the minimum value, and the maximum value stored in the secondary storage areas 4421f, 4421g, and 4421h shown in FIG. 6 shows a state when the data is output to and displayed on the display device provided in 6.

By displaying in this manner, it is possible to determine whether or not the engine system is moving smoothly by observing the transition of the engine speed for each cumulative operation time. Similarly, collected data from the accelerator sensor, governor sensor, and engine control command value for each cumulative operating time can also be displayed, and similarly, it can be used as determination data as to whether the engine system is moving smoothly. .

FIG. 16 is a distribution diagram of frequency data representing the frequency of occurrence of the detection data obtained from the engine speed sensor at each detection data level. The horizontal axis represents the engine speed sensor, accelerator sensor, governor sensor, and engine control. Each level 1 to m of each detection data obtained from the command value
(1 to 5%, 6 to 10%... 96 to 100%), and the vertical axis represents the appearance frequency of each detection data for each level.

As for these display data, the frequency data 1 to m stored in the secondary storage area 4421e shown in FIG. 14 are output to the display device 5 or the display device provided in the monitoring device 6 as shown in FIG. Represents the state when displayed.

By displaying in this manner, the condition of the engine system can be grasped in advance by analyzing the change of the appearance frequency for each level of each detection data.

As described above, according to each embodiment of the present invention, a display device for data collection, which is carried by a service person, is attached to the data collection device, and each collected data is displayed in time series at the site. By doing so, the state change of the engine system can be easily grasped, and by displaying the frequency distribution data of each detection data, it can be easily grasped whether or not the engine system is operating normally.

Also, by using a communication device, a command is issued from a monitoring device provided in a remote management office or the like.
Collected data can be obtained from the data collection device,
The collected data similar to the above is displayed on the display device or the like without the service staff going to the site, and the state of the engine system can be easily grasped at the management office.

[0058]

As described above, according to the present invention, when any one of the input detection data satisfies a predetermined condition at every predetermined operation time of the mobile work machine, the present invention is provided together with the detection data. Since the other detected data is also processed at the same time to obtain the collected data, the collected data can be correlated with each other, and the collected data can be compared and determined later under the same condition. Because it is possible, it is extremely effective for grasping the state of the engine system.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a mobile work machine monitoring device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of various detection data stored in a primary storage area 441 of a memory 44 of the data collection device 4 shown in FIG.

FIG. 3 shows a second memory 44 of the data collection device 4 shown in FIG.
FIG. 9 is a diagram illustrating an example of various collected data stored in a next storage area 442.

FIG. 4 is a diagram showing an example of a conversion coefficient table stored in a memory 44 of the data collection device 4 shown in FIG.

FIG. 5 is a flowchart for explaining the operation of the data collection device 4 shown in FIG.

FIG. 6 is a flowchart for explaining the operation of the data collection device 4 shown in FIG.

FIG. 7 is a flowchart for explaining the operation of the data collection device 4 shown in FIG.

8 is a flowchart for explaining the operation of the data collection device 4 shown in FIG.

9 is a flowchart for explaining the operation of the data collection device 4 shown in FIG.

FIG. 10 is a diagram showing distributions of a maximum value, an average value, and a minimum value of detection data in each cumulative operation time according to the first embodiment.

FIG. 11 is a diagram showing a distribution of an appearance frequency at each level of each detection data according to the first embodiment.

FIG. 12 is an overall configuration diagram of a mobile work machine monitoring device according to a second embodiment of the present invention.

13 is a memory 44 of the data collection device 4 shown in FIG.
FIG. 7 is a diagram showing an example of various detection data stored in a primary storage area 441.

14 is a memory 44 of the data collection device 4 shown in FIG.
5 is a diagram showing an example of various collected data stored in a secondary storage area 442 of FIG.

FIG. 15 shows a maximum value of data detected by an engine speed sensor at each cumulative operation time according to the second embodiment;
It is a figure which shows distribution of an average value and a minimum value.

FIG. 16 is a diagram showing the distribution of the appearance frequency at each level of each piece of detection data according to the second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Operating state detection part 11 Lever sensor 12 Accelerator sensor 13 Governor sensor 14 Engine speed sensor 2 Throttle motor 3 Engine controller 33 CPU 4 Data collection device 43 CPU 44 Memory 441 Primary storage area 4411 Detection data storage area of engine speed sensor 4412 Accelerator sensor detection data storage area 4413 Governor sensor detection data storage area 4414 Engine control command value detection data storage area 442 Secondary storage area 4421 Collected data storage area for engine speed sensor 4422 Accelerator sensor collected data storage area 4423 Storage area for collected data of governor sensor 4424 Storage area for collected data of engine control command values 4421c, 4421d Storage area for collection conditions 1 and 2 4421e Frequency data Conserved region 4421f maximum value of storage area 4421g minimum value of storage area 4421h average value of storage area 45 the memory 46 the timer 5 display 6 monitoring apparatus

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

Claims (5)

[Claims] An engine control means for inputting respective detection data obtained from an accelerator sensor, a governor sensor, and an engine speed sensor and performing an arithmetic process to obtain at least an engine control command value for controlling the governor. By inputting the respective detection data obtained from the accelerator sensor, governor sensor, and engine speed sensor and the engine control command value as the detection data from the engine control means, and performing predetermined arithmetic processing. A monitoring device for a mobile work machine, comprising: a data collection unit that obtains collected data; and a display unit that outputs and displays the collected data. The data collection unit may include any one of the input detection data. When the detected data satisfies a predetermined condition, the detected data is included together with the detected data. Mobile work machine of the monitoring device, characterized in that the other detection data other than data also obtain collecting data corresponding to each detection data by processing simultaneously. 2. The movement according to claim 1, wherein the predetermined condition is that any one of the input detection data is continuously in an idling rotation range for a predetermined time. Monitoring equipment for work machines. 3. The method according to claim 1, wherein
In one of the claims, the collected data is a maximum value, a minimum value, an average value, and a frequency distribution data obtained by arithmetically processing each of the detection data for each predetermined cumulative operation time of the mobile work machine. A monitoring device for a mobile work machine. 4. The display form of the collected data according to claim 3, wherein the display form of the collected data displayed on the display means includes a maximum value, a minimum value, and an average value of each detection data in each of the cumulative operation times, and A monitoring device for a mobile work machine, characterized by displaying frequency distribution data at a level. 5. The method according to claim 3, wherein each of the detection data includes predetermined detection data and each of the other detection data converted to facilitate comparison with the predetermined detection data. The display mode of the collected data displayed on the display means is to display the maximum value, the minimum value, and the average value of each detection data at each cumulative operation time on the same display surface, and to display each level of each detection data. A monitoring device for the mobile work machine, wherein the monitoring device displays the frequency distribution data.