JP2009091109A - Data storage device of operating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide necessary and sufficient information by efficiently storing operating data. <P>SOLUTION: This data storage device of an operating machine is provided with: data acquisition means 2 and 3 acquiring operating data changing in response to an operating condition; first and second storage means 12 and 13 storing the operating data acquired by the data acquisition means 2 and 3 in a predetermined period; an instruction output means 1 outputting a data storage instruction; a data storage means 15 storing operating date in response to the data storage instruction; and a control means 16 controlling the respective storage mans 12, 13 and 15 to store the operating data in the first storage means 12 in the first period, store the operating data in the second storage means 13 in a second period longer than the first period, and store the data stored in the first and second storage means 12 and 13 in the data storage means 15 when the data storage instruction is output. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data storage device that stores various data acquired by a work machine such as a crane.

  As this type of data storage device, for example, a device described in Patent Document 1 below is known. In the device described in Patent Document 1, load factor data for the most recent predetermined time is always stored in the data storage unit at the time of crane work, and the load factor exceeds a set value and is overloaded. Automatically stores load factor data for a predetermined time immediately after an overload condition occurs.

JP 2002-326785 A (FIGS. 6 to 9)

  However, with the apparatus described in Patent Document 1, only load factor data for a predetermined time before and after an overload state can be obtained, and the amount of information is insufficient. If the predetermined time is set long, the amount of information increases, but the storage area is wasted and is not efficient.

The present invention provides data acquisition means for acquiring work data that changes in accordance with a work state, first and second storage means for storing work data acquired by the data acquisition means at a predetermined cycle, and a data storage command. Command output means for outputting, data storage means for storing work data in response to a data storage command, work data is stored in the first storage means in the first cycle, and first cycle is stored in the second storage means. The work data is stored in a longer second cycle, and when the data storage command is output from the command output means, the data stored in the first and second storage means is stored in the data storage means. And a first storage means, a second storage means, and a control means for controlling the data storage means.
The first storage means has a storage capacity capable of storing data for a first predetermined time under the first cycle, and the second storage means has a storage capacity from the first predetermined time under the second cycle. Each of which has a storage capacity capable of storing data for a long second predetermined time, stores the data acquired by the data acquisition means in the first storage means, and stores the data for the first predetermined time in the first storage means. When the data is stored, the data can be thinned out and transferred from the first storage means to the second storage means, and the transferred data can be stored in the second storage means.
In this case, after the data is thinned and transferred from the first storage means to the second storage means, the old work data is sequentially sequentially stored until new work data for the first predetermined time is stored in the first storage means. Is preferably rewritten to new work data.
A third storage means having a storage capacity capable of storing data for a third predetermined time longer than the second predetermined time and in a third period longer than the second period; When data for a second predetermined time is stored in the second storage means, the data is further thinned and transferred from the second storage means to the third storage means, and the transferred data is transferred to the third storage means. Can also be stored.
Furthermore, an abnormality determination unit that determines whether the work data is abnormal may be provided, and a data storage command may be output when the abnormality determination unit determines that the work data is abnormal.

  According to the present invention, the work data is stored in the plurality of storage means at different periods, and when the data storage command is output, the work data of each storage means is stored in the data storage means. Necessary and sufficient information can be obtained by effectively using the area.

An embodiment of a data storage device for a work machine according to the present invention will be described with reference to FIGS.
FIG. 1 is a side view of a crane that is an example of a work machine including a data storage device according to the present embodiment. The crane includes a traveling body 101, a revolving body 102 provided on the traveling body 101 so as to be able to turn, and a boom 103 pivotally supported on the revolving body 102 so as to be able to move up and down. The revolving body 102 is equipped with a hoisting drum 104 and a undulating drum 105. A hoisting rope 104 a is wound around the hoisting drum 104, and the hoisting rope 104 a is wound or fed out by driving of the hoisting drum 104, and the suspended load moves up and down. A hoisting rope 105 a is wound around the hoisting drum 105, and when the hoisting drum 105 is driven, the hoisting rope 105 a is wound or fed out, and the boom 103 is lifted.

  FIG. 2 is a block diagram showing a configuration of the data storage device according to the present embodiment. The arithmetic device 1 has an angle detector 2 for detecting a boom angle, a load detector 3 for detecting a suspension load, a setting switch 4 for inputting a set value for error determination, and a display for displaying error information and the like. A monitor 5, an electromagnetic proportional valve 6 for stopping the supply of drum drive pressure oil, and a storage device 10 are connected. The load detector 3 is, for example, a load cell that detects undulation rope tension, and a suspension load is calculated from this tension detection value.

  The computing device 1 computes the actual work radius based on the signal from the angle detector 2 and computes the actual suspension load based on the signal from the load detector 3. The calculation device 1 has a preset relationship between the limit load and the working radius, and when the ratio of the actual suspension load to the limit load at the actual work radius (load factor) is equal to or greater than a predetermined value (for example, 100%), the calculation device 1 outputs a control signal to the electromagnetic proportional valve 6 to stop driving the drums 104 and 105. Thereby, the load which acts on a crane is restrict | limited and the fall of a crane is prevented. That is, the arithmetic device 1 has a function as an overload prevention device (moment limiter). The arithmetic device 1 samples signals (angle data and load data) from the detectors 2 and 3 every predetermined time (for example, 1 second), and outputs them to the storage device 10 together with the load factor data.

  Further, the arithmetic unit 1 compares the signals (detection signals) from the detectors 2 and 3 with the set values by the setting switch 4, and determines whether or not the detection signals are within the normal range, that is, whether or not there is an error. . For example, if the detectors 2 and 3 are broken due to disconnection or the like, the detection signal exceeds the normal range, so it is determined that there is an error. In this case, an error signal is output to the storage device 10 together with the angle signal, the load signal, and the load factor. The error signal continues to be output until the error state is cleared.

  The storage device 10 includes an A memory 11, a B memory 12, a C memory 13, a D memory 14, and an E memory 15. These memories 11 to 15 are nonvolatile memories such as EEPROMs, and data is stored in each of the memories 11 to 15 as described later. The data storage operation is controlled by the CPU 16.

  FIG. 3 is a flowchart illustrating an example of processing executed by the CPU 16. The process shown in this flowchart is started, for example, when the computing device 1 is powered on. In step S1, it is determined whether angle data, load data, and load factor data are input from the arithmetic unit 1. If step S1 is affirmed, the process proceeds to step S2. In step S2, the input angle data, load data, and load factor data are stored in the A memory 11 together with the time data. At this time, data is arranged in the A memory 11 in order of time and stored as time history data.

  In step S3, it is determined whether or not the data in the A memory 11 is full, that is, whether or not the data is stored in all the storage areas of the A memory 11. For example, under a predetermined sampling time, a time T1 required for data to become full is set as a predetermined time in advance, and data full is determined by determining whether or not the predetermined time T1 has elapsed. The predetermined time T1 varies depending on the data storage capacity of the memory, but is set to 6 hours, for example. In this case, when the operation is interrupted by turning off the arithmetic device 1, the time counting is temporarily interrupted. When the arithmetic device 1 is turned on, the counting is restarted from the interrupted state. If step S3 is affirmed, that is, if it is determined that the data in the memory 11 is full, the process proceeds to step S4, and if not, the process proceeds to step S10.

  In step S4, the data stored in the A memory 11 is transferred to the B memory 12, and the transferred data is newly stored in the B memory 12. The B memory 12 can store data for a predetermined time T2 (> T1). If the data in the B memory is already full, the time stored in the B memory 12 The oldest data for a predetermined time T1 is erased, and the data transferred from the A memory 11 is newly stored. That is, the data in the B memory 12 is overwritten for a predetermined time T1. As a result, the latest time history data is stored in the B memory 12 every predetermined time T1. At this time, the B memory 12 stores the data rearranged in order of time.

  In step S5, the data stored in the A memory 11 is erased and a timer for counting the predetermined time T1 is reset. Thereby, time history data for a predetermined time T1 can be newly stored in the A memory 11 (step S2).

  In step S6, based on the initial state or the time when data is transferred to the C memory 13 (step S7), it is determined whether or not data for a predetermined time T2 has been stored in the B memory 12 from this reference time. The predetermined time T2 corresponds to a time (for example, 72 hours, that is, 3 days) when the B memory 12 runs out of free space and the data becomes full. The data storage capacity of the B memory 12 is larger than the data storage capacity of the A memory 11. Is also big. If step S6 is affirmed, the process proceeds to step S7, and if not, the process proceeds to step S10.

  In step S7, the data stored in the B memory 12 is thinned out at a predetermined rate and transferred to the C memory 13, and the transferred data is newly stored in the C memory 13. Specifically, the data in the B memory 12 is thinned out every 30 minutes, and time history data having a longer time interval than that in the B memory 12 is stored in the C memory 13. In this case, one point of data may be stored every 30 minutes, but continuous data for a predetermined time (for example, 10 seconds) may be stored.

  Note that data for a predetermined time T3 (> T2) can be stored in the C memory 13, but if the data in the C memory is already full, the time stored in the data stored in the C memory 13 The oldest data for a predetermined time T2 is erased, and the data transferred from the B memory 12 is newly stored. That is, the data in the C memory 13 is overwritten for a predetermined time T2. As a result, the latest time history data is stored in the C memory 12 every predetermined time T2. At this time, the C memory 13 stores the data rearranged in order of time.

  In step S8, based on the initial state or the time when data is transferred to the D memory 14 (step S9), it is determined whether data for a predetermined time T3 has been stored in the C memory 13 from this reference time. The predetermined time T3 corresponds to a time (for example, one week) when the C memory 13 runs out of free space and data becomes full. If step S8 is affirmed, the process proceeds to step S9. If negative, the process proceeds to step S10.

  In step S9, the data stored in the C memory 13, that is, the data thinned out every 30 minutes is further thinned out at a predetermined rate and transferred to the D memory 14, and the transferred data is newly arranged in time history order. And stored in the D memory 14. Specifically, data in the C memory 13 is thinned out to data every 4 hours, and time history data having a longer time interval than in the C memory 13 is stored in the D memory 14.

  In step S10, it is determined whether or not an error signal is input from the arithmetic unit 1, that is, whether or not the detectors 2 and 3 are out of order. When step S10 is affirmed, the process proceeds to step S11, and when it is denied, the process returns. In step S <b> 11, the data stored in the B memory 12 to the D memory 14 is transferred to the E memory 15 and stored in the E memory 15.

  The operation of the data storage device according to the present embodiment will be described more specifically with reference to FIG. During the work, the A memory 11 stores the angle data, the load data, and the load factor data output from the arithmetic device 1 (step S2). When data for a predetermined time T1 (6 hours) is stored in the A memory 11, the A memory 11 becomes full. At this time, the data in the A memory 11 is transferred to the B memory 12 (step S4). Data for a predetermined time T2 (3 days) can be stored in the B memory 13, of which 6 hours of old data is sequentially overwritten with new data transferred from the A memory 11. That is, the data in the B memory 12 is rewritten every 6 hours, and the B memory 12 stores data for 3 days every second.

  When all the three days of data in the B memory are overwritten, the data in the B memory 12 is thinned out every 30 minutes and transferred to the C memory 13 (step S7). The C memory 13 can store data for a predetermined time T3 (one week) thinned out every 30 minutes, among which old data for 3 days is sequentially overwritten with new data transferred from the B memory 12. . That is, the data in the C memory 13 is rewritten every three days, and the data for one week is stored in the C memory 13 every 30 minutes. Since the data is thinned and stored in the C memory 13 in this way, data with a long time history can be stored in the C memory 13 with a small storage capacity.

  When all the data for one week in the C memory is overwritten, the data in the C memory 13 is thinned out to data every 4 hours and transferred to the D memory 14 (step S9). The D memory 14 can store data for a predetermined time T4 (for example, one month) thinned out every 4 hours. Of this, old data for one week is sequentially overwritten by new data transferred from the C memory 13. The That is, the data in the D memory 14 is rewritten every week, and the D memory 14 stores data for one month every four hours. Since data is thinned and stored at longer intervals in this way, data with a longer time history can be stored in the D memory 14 with a smaller storage capacity.

  If the detectors 2 and 3 fail during operation, an error signal is output from the arithmetic unit 1. As a result, the data in the B memory 12 to the D memory 14 is transferred and stored in the E memory 15 (step S11). That is, the E memory 15 stores time history data for 3 days per second before the occurrence of an error, time history data for 1 week every 30 minutes, and time history data for 1 month every 4 hours. . Data stored in the E memory 15 can be displayed on the display monitor 5.

  By storing the data before the occurrence of the error in the E memory 15 in this way, it can be used for specifying the cause of the error and analyzing various data. For example, when the data gradually deviates from the normal value over time, it is possible to easily determine from which point in time such a sign is seen. Note that data is stored in the A memory 11 to D memory 14 every predetermined time after an error has occurred, as before the error has occurred. Therefore, it is possible to grasp the change in data after the occurrence of an error using the data stored in each of the memories 11 to 14.

According to the present embodiment, the following operational effects can be achieved.
(1) Data for 3 days per second is stored in the B memory 12, data for 1 week every 30 minutes is stored in the C memory 13, and data for 1 month every 4 hours is stored in the D memory 14. I did it. That is, since the data before the error occurrence is stored in each of the memories 12 to 14 at different cycles, the data before the error occurrence can be efficiently stored in a memory having a limited storage capacity. Necessary and sufficient error information useful for analysis and the like can be obtained.
(2) When an error signal is output, the data stored in each of the memories 12 to 14 is transferred to the E memory 15, so that the data before the error can be stored together in the E memory 15. Therefore, it does not take time to search for necessary data, and the necessary data can be easily acquired.

(3) Since the data for three days immediately before the error occurrence is stored in a short cycle (every second), the cause of the error occurrence can be easily identified.
(4) When the data in the A memory becomes full, the data is transferred from the A memory 11 to the B memory 12, and when the data in the B memory becomes full, the data is thinned and transferred from the B memory 12 to the C memory 13. When the data in the memory becomes full, the data is further thinned and transferred from the C memory 13 to the D memory 14. Thereby, it is not necessary to store data in each of the memories 11 to 14 in a double manner, and the storage capacity can be used efficiently.
(5) When the data stored in the B memory 12 and the data stored in the C memory 13 are full, new data for a predetermined time T2, T3 is stored in each of the memories 12, 13 after the data transfer. Until then, old work data was rewritten to new work data. As a result, the latest work data is stored in the memories 12 and 13, and the data immediately before the occurrence of the error can be acquired.

  In the above embodiment, when an error signal is output from the arithmetic unit 1, a data storage command is output and the data in the B memory 12 to D memory 14 is stored in the E memory 15 as data storage means. However, for example, data may be transmitted to the base station using communication means, and the configuration of the data storage means is not limited to that described above. Not only when an error signal is output, but also when a manual switch in the cab is pressed or when a recording command is output from a remote location, a data storage command may be output. The configuration of the means is not limited to that described above.

  The data is thinned out and transferred every 30 minutes and every 4 hours from the B memory 12 and the C memory 13 to the C memory 13 and the D memory 14, respectively, but the operator can arbitrarily set the data thinning interval. Also good. The interval at which data is thinned may be automatically changed according to the frequency with which the error signal is output. For example, when the error signal is not output for a long time, the interval for thinning out the data may be set longer. Although data for 3 days, 1 week, and 1 month are stored in the memories 12 to 14, respectively, these times may be changed according to the frequency of thinning out the data.

  The configurations of the B memory 12 and the C memory 13 as the first storage means and the configurations of the C memory 13 and the D memory 14 as the second storage means are not limited to those described above. The B memory 12 (first storage means) stores data for three days (first predetermined time) every second (first cycle), and the C memory 13 (second storage means) stores 30 data. One week's worth of data (second predetermined time) is stored every minute (second period), and one month's worth of data every four hours (third period) in the D memory 14 (third storage means). Although the data for the third predetermined time is stored, the work data is stored in the C memory 13 at a cycle longer than at least the B memory 12, or the work data is stored in the D memory 14 at a cycle longer than the C memory 13. As long as data is stored, any data storage time and storage time interval may be used.

  When the data is stored in the memories 11 to 13 in full, the data is transferred to the memories 12 to 14, respectively. However, the data may be transferred before the data becomes full. The processing in the CPU 16 as the control means is not limited to that shown in FIG. Although the arithmetic device 1 determines whether or not the work data is abnormal and outputs an error signal when an error occurs, the abnormality determination means is not limited to this. Although the work data is acquired by the angle detector 2 and the load detector 3, the data acquisition means is not limited to this.

  In the above embodiment, the case where angle data, load data, and load factor data are acquired from the crane overload prevention device has been described. However, other work data such as pump load pressure may be acquired. . For example, data may be acquired from a construction management device for a basic machine. While the crane data storage device has been described above, the present invention is also applicable to other work machines that store work data. In other words, the present invention is not limited to the data storage device as long as the features and functions of the present invention can be realized.

The side view of the crane which is an example of the working machine provided with the data storage device which concerns on embodiment of this invention. 1 is a block diagram showing a configuration of a data storage device according to an embodiment. The flowchart which shows an example of the process performed by CPU of FIG. The figure which shows operation | movement of the data storage device which concerns on this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Computation device 2 Angle detector 3 Load detector 10 Storage device 11 A memory 12 B memory 13 C memory 14 D memory 15 E memory 16 CPU

Claims (5)

Data acquisition means for acquiring work data that changes according to the work state;
First and second storage means for storing work data acquired by the data acquisition means at a predetermined cycle;
Command output means for outputting a data storage command;
Data storage means for storing work data in response to the data storage command;
Work data is stored in the first storage means in a first cycle, work data is stored in the second storage means in a second cycle longer than the first cycle, and the command output means When the data storage command is output, the first storage means, the second storage means, and the data so as to store the data stored in the first and second storage means in the data storage means A data storage device for a work machine, comprising: control means for controlling the storage means. In the data storage device of the work machine according to claim 1,
The first storage means has a storage capacity capable of storing data for a first predetermined time under the first period;
The second storage means has a storage capacity capable of storing data for a second predetermined time longer than the first predetermined time under the second period,
The control means stores the data acquired by the data acquisition means in the first storage means, and when the data for the first predetermined time is stored in the first storage means, the first storage means A data storage device for a work machine, wherein the data is thinned and transferred from the storage means to the second storage means, and the transferred data is stored in the second storage means. The data storage device for a work machine according to claim 2,
The control unit thins out and transfers data from the first storage unit to the second storage unit, and then new work data for the first predetermined time is stored in the first storage unit. A data storage device for a work machine, characterized by sequentially rewriting old work data to new work data. In the data storage device of the work machine according to claim 2 or 3,
Third storage means having a storage capacity capable of storing data for a third predetermined time longer than the second predetermined time and in a third period longer than the second period. ,
When the data for the second predetermined time is stored in the second storage unit, the control unit further thins out and transfers the data from the second storage unit to the third storage unit. A data storage device for a work machine, wherein the stored data is stored in the third storage means. In the data storage device of the work machine according to any one of claims 1 to 4,
Furthermore, it has an abnormality determination means for determining the presence or absence of abnormality in the work data,
A data storage device for a work machine, wherein the command output means outputs the data storage command when the abnormality determination means determines that the work data is abnormal.

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