JP4380928B2 - Operation status monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation status monitoring device that is connected to each NC device of a plurality of NC machine tools provided with an NC device, acquires data from each NC device, and monitors the operation status of each NC machine tool.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, each NC device of a plurality of NC machine tools equipped with NC devices is connected to a management device via a network such as a LAN, and data such as a machining program or a machining plan is transmitted from the management device to each NC device. Alternatively, the management device side receives data on the operation status from each NC device, and the management device centrally manages the operation status of each NC machine tool.
[0003]
Conventionally, when receiving data related to the operation status from each NC device, the management device is configured to obtain data related to the operation status from each NC device by sampling at regular intervals.
[0004]
By the way, as described above, the network is usually used not only for obtaining data relating to the operation status but also for transmitting data such as machining programs and machining plans. Therefore, depending on the load state (congestion) of the network, it may take a longer time than usual to acquire the data related to the operation status. For this reason, in the conventional management apparatus, considering the communication state, the sampling interval is set to a sufficiently long time so that data can be reliably acquired even in a crowded network. .
[0005]
However, if the sampling interval is made longer, there is a merit that data can be acquired with certainty, but on the other hand, there is a problem that accurate information cannot be obtained because the number of acquired data is reduced.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an operating condition monitoring apparatus capable of obtaining accurate information by appropriately setting a sampling interval.
[0007]
[Means for solving the problems and effects thereof]
The invention described in claim 1 of the present invention for solving the above-mentioned problems is connected to each NC device of a plurality of NC machine tools provided with an NC device, acquires data from each NC device, and An operating status monitoring device for monitoring the operating status of an NC machine tool,
Sampling interval setting means for setting a time interval for acquiring data from each NC device;
Data fetching means for receiving data related to the operating status of each NC machine tool from the NC device at each time interval set by the sampling interval setting means and measuring the time required for the acquisition each time the data is acquired When,
Operation data storage means for storing data on the operation status acquired by the data fetching means for each NC machine tool;
Acquisition time storage means for storing the acquisition time measured by the data capture means;
Data output means for outputting the data stored in the operation data storage means to the outside,
The sampling interval setting unit is configured to update the time interval based on a past acquisition time stored by the acquisition time storage unit.
[0008]
According to the operation status monitoring apparatus of the present invention, first, the sampling interval setting means sets the time interval for acquiring data, that is, the sampling interval. Then, at each set time interval, data relating to the operating status of the NC machine tool is acquired from each NC apparatus by the data fetching means, and the acquired operating data is stored in the operating data storage means. The stored operation data is appropriately output to the outside by the data output means. Thus, the operation status of each NC machine tool is confirmed by the output data.
[0009]
Then, the sampling interval is reset and updated in the sampling interval setting means based on the past acquisition time stored in the acquisition time storage means so as to be an appropriate time with a margin to this. . For example, a new sampling interval is calculated and updated by multiplying the longest acquisition time for the latest several times by a constant (for example, 1.2). Therefore, if the latest acquisition time tends to be longer, the sampling interval is updated accordingly, and if the latest acquisition time tends to be shorter, the sampling interval is reduced accordingly. Updated to As a result, data can be acquired reliably and at the shortest sampling interval, and highly accurate information can be acquired.
[0010]
In the invention described in claim 2 of the present invention, the sampling interval setting means in the invention described in claim 1 monitors the data acquisition status in the data fetching means, and the data acquisition within the time interval. The present invention relates to an operation status monitoring device configured to reset the time interval to a time extended from the current time when acquisition cannot be completed.
[0011]
As described above, in the invention according to claim 1, the sampling interval is set to a time with a margin, but data acquisition cannot be completed within the set sampling interval depending on how busy the network is. If the state where data cannot be acquired continues as described above, there is a problem that information obtained is inaccurate. According to the present invention, when the data acquisition cannot be completed within the sampling interval, the set sampling interval is reset to a time extended from the current time. Therefore, even if data acquisition cannot be completed due to unforeseen circumstances, resetting the sampling interval to a time extended from the current time immediately returns the data acquisition to a state where it can be completed. be able to. As a result, it is possible to prevent a state in which data cannot be acquired from continuing, and to obtain accurate information. After the resetting, the sampling interval is updated based on the past acquisition time so as to be optimum as described above.
[0012]
According to a third aspect of the present invention, in the first or second aspect of the present invention, based on the operation data stored by the operation data storage means, the accumulated time of the operation state of each NC machine tool. A cumulative time calculating means for calculating
Cumulative time storage means for storing cumulative time data calculated by the cumulative time calculation means;
A data output means relates to an operation status monitoring device configured to output the accumulated time data stored in the accumulated time storage means or the accumulated time data and data stored in the operation data storage means to the outside .
[0013]
According to the present invention, the accumulated time for the operating state of each NC machine tool calculated by the accumulated time calculating means and stored in the accumulated time storage means is output to the outside by the data output means. Thus, it is possible to confirm a more detailed operating status of each NC machine tool by such output data.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an explanatory diagram illustrating a schematic configuration of an operation status monitoring system according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating a schematic configuration of an operation status monitoring device according to the present embodiment. . 4 and 5 are flowcharts showing the processing procedure in the sampling interval setting means of the present embodiment.
[0015]
As shown in FIG. 1, the operating status monitoring system 1 of this example includes an operating status monitoring device 10, a plurality of NC machine tools 2 equipped with NC devices, and these operating status monitoring devices 10 and NC machine tools 2. It is composed of a network 3 such as a LAN connected to each other.
[0016]
As shown in FIG. 3, the operating status monitoring apparatus 10 includes a data capturing unit 12, an acquisition time storage unit 13, a sampling interval setting unit 14, an operation data storage unit 15, a cumulative time calculation / update unit 16, a cumulative total. It consists of a time storage means 17 and a display processing means 18. A display device 20 such as a CRT is connected to the display processing means 18 as an external device.
[0017]
The data fetching means 12 is connected to the NC device of each NC machine tool via the network 3, and acquires data relating to the operating status of the NC machine tool from each NC device. The acquired data includes, for example, (1) main power ON / OFF data, (2) automatic operation ON / OFF data, (3) main shaft rotation ON / OFF data, (4) main shaft rotation speed and main shaft motor. (5) Alarm ON / OFF data, (6) Alarm number and alarm message data, (7) Coolant ON / OFF data, and the like. The acquired data is not limited to these, and can be added or reduced as necessary, such as manual operation ON / OFF data.
[0018]
Then, the data fetching unit 12 accesses the NC devices for each sampling interval set by the sampling interval setting unit 14 performing processing described later, and acquires the operation data described above by the multitask method. The data fetching unit 12 has a built-in clock, and stores the operation data in the operation data storage unit 15 together with time data at the time of acquisition. If all data cannot be acquired within the sampling interval, the data fetching unit 12 does not store the acquired operating data in the operating data storage unit 15 but discards it.
[0019]
As shown in the figure, the operation data storage means 15 comprises an A file 15a, a B file 15b, a C file 15c, a D file 15d, and an E file 15e. For example, the A file 15a contains ON / OFF data of the main power supply. In the B file 15b, automatic operation ON / OFF data is stored in the D file 15d, and in the C file 15c, data related to the spindle, that is, spindle rotation ON / OFF data, spindle rotation speed and spindle motor load are stored in the D file 15d. The data relating to the alarm, that is, the data relating to the alarm ON / OFF, the alarm number and the alarm message are stored in the E file 15e for each NC machine tool.
[0020]
Further, each time the operation data is acquired from each NC device, the data fetching unit 12 measures the time required for the acquisition, and stores the acquired acquisition time in the acquisition time storage unit 13.
[0021]
The sampling interval setting unit 14 sequentially executes the processes shown in FIGS. 4 and 5 to set the sampling interval used by the data fetching unit 12. 4 shows an initial stage sampling interval setting process, and FIG. 5 shows a sampling interval update process during system operation.
[0022]
As shown in FIG. 4, in the sampling interval setting process in the initial stage, first, a command is issued to the data acquisition means 12 to acquire the operation data continuously from each NC device for 3 minutes (step S1). In acquiring the operation data, the data acquisition unit 12 sequentially measures the time required for data acquisition, and the measured acquisition time is stored in the acquisition time storage unit 13.
[0023]
Next, the sampling interval setting means 14 searches for the acquisition time stored in the acquisition time storage means 13, reads the longest acquisition time from this, and multiplies this by, for example, 1.2 to calculate the sampling interval. (Step S1).
[0024]
Next, the sampling interval setting unit 14 issues a command to the data acquisition unit 12 again to acquire the operation data from each NC device at each set sampling interval (step S2), and the entire operation is performed at each sampling. It is monitored whether data has been acquired (step S3). And when all the operation data are acquired within the set sampling interval, the said sampling interval is set as an initial sampling interval (step S5). On the other hand, when all the operation data could not be acquired, the current sampling interval is multiplied by 1.2 to obtain a new sampling interval (step S4), and the above steps S2 and S3 are executed again at this sampling interval, The process is repeated until a sampling interval capable of acquiring all operation data is obtained (steps S2, S3, S4), and the obtained sampling interval is set as an initial sampling interval (step S5).
[0025]
As described above, the initial sampling interval before the system is continuously operated is set.
[0026]
Next, a sampling interval update process during system operation will be described with reference to FIG. In this process, first, the acquisition time storage unit 13 is searched to check whether or not there is acquisition time data at the last five samplings (step S11). If data exists, the time obtained by multiplying the maximum value by 1.2 is reset as a sampling interval to be used next, and the data acquisition is performed with the reset sampling interval. The sampling interval used in the insertion means 12 is updated (step S12).
[0027]
After updating the sampling interval, or when it is determined in step S11 that there is no past five acquisition time data, next, it is confirmed whether or not the processing is continued (step S13), and then the data fetching means When the process of 12 is monitored and all operation data is acquired within the sampling interval, the processes of steps S11, S12, and S13 are repeated, and when all operation data cannot be acquired within the sampling interval, Proceed to the next step S15 (step S14). In step S15, it is confirmed again whether or not to continue the process. And when continuing a process, the process of the data acquisition means 12 is again monitored, and when all operation data are acquired within a sampling interval, the process after step S11 is repeated, and within a sampling interval If all the operation data cannot be acquired, the process proceeds to the next step S17 (step S16).
[0028]
In step S17, the time obtained by multiplying the currently set sampling interval by 1.2 is reset as the sampling interval to be used next, and the data fetching unit 12 uses the reset sampling interval. Update the sampling interval used. Then, after confirming whether or not to continue the processing (step S18), when the processing is continued, the processing of the data fetching means 12 is again monitored, and all operation data is acquired within the sampling interval. If the operation data has not been acquired within the sampling interval, the processing after step S17 is repeated (step S19).
[0029]
If the end of the process is confirmed in steps S13, S15, and S18, the process ends.
[0030]
As described above, in the sampling interval update processing during system operation, a new sampling interval is reset based on the past data acquisition time, and is used in the data capturing unit 12 with the set sampling interval. The sampling interval is updated each time. In addition, when the data acquisition unit 12 cannot complete the operation data acquisition twice in succession, a new sampling interval that extends the current sampling interval is reset, and the data acquisition is performed at the set sampling interval. The sampling interval used in the insertion means 12 is updated. Note that if the acquisition of operating data could not be completed twice, the sampling interval was updated because it was assumed that the data could not be acquired once due to extremely low frequency. Even in such a case, if the process of increasing the sampling interval is performed, the amount of data that should be originally obtained decreases, and accurate information cannot be obtained. The transition of the sampling interval updated in this way is illustrated in FIG.
[0031]
The accumulated time calculating / updating means 16 performs processing for calculating the accumulated time of the operating state based on the data stored in the operating data storage means 15. As described above, the operation data storage unit 15 stores time data at the time of acquiring data together with the acquired operation data. Therefore, it is possible to calculate the cumulative operating time from these data. For example, for (1) main power source, (2) automatic operation, (3) main shaft, (4) alarm, and (5) coolant, the total of the time during which these are ON and OFF is calculated. The calculated accumulated time is stored in the accumulated time storage means 17. The accumulated time calculating / updating means 16 calculates the accumulated time regularly or irregularly, and updates the data stored in the accumulated time storage means 17.
[0032]
As shown in the figure, the cumulative time storage means 17 comprises an A cumulative file 17a, a B cumulative file 17b, a C cumulative file 17c, a D cumulative file 17d, and an E cumulative file 17e. The cumulative time for automatic operation is stored in the B cumulative file 17b, the cumulative time for spindle rotation is stored in the C cumulative file 17c, the cumulative time for alarms is stored in the D cumulative file 17d, and the E cumulative file is stored in the E cumulative file. In 17e, the accumulated time for the coolant is stored for each NC machine tool.
[0033]
The display processing unit 18 performs an appropriate process on each data stored in the operation data storage unit 15 and each data stored in the accumulated time storage unit 17 to add to the display device 20. Process to be displayed. Specifically, for example, the screens shown in FIGS. 6 and 7 are displayed on the display device 20. Fig. 6 shows the time when the main power is ON (energization time), the time when automatic operation is ON (operation time), the time when the main shaft is ON (main shaft rotation time), and the automatic operation is OFF Is a graph of the accumulated time for the time when the alarm is stopped (stop time), the time when the alarm is ON (alarm generation time), and the time when the coolant is ON (coolant discharge time). 7 is a table of these.
[0034]
According to the operation status monitoring system 1 of the present example having the above-described configuration, data relating to the operation status of the NC machine tool is obtained from each NC device connected via the network 3 by the data fetching means 12 at the sampling interval. The operation data acquired at every sampling interval set by the setting unit 14 is stored in the operation data storage unit. Further, based on the operation data stored in the operation data storage means 15, the accumulated time calculation / update means 16 calculates the accumulated time relating to the operation state, and the calculated accumulated time data is stored in the accumulated time storage means 17. Or the accumulated time data stored in the accumulated time storage means 17 is updated with the calculated accumulated time data.
[0035]
The sampling interval set by the sampling interval setting means 14 is initially set to a time with a margin based on the acquisition time obtained by performing preliminary sampling, and the past acquisition time during system operation. Based on the above, it is sequentially updated at a set time with a margin. Further, when all the operation data cannot be acquired, the data is updated to a new sampling interval obtained by extending the sampling interval at that time.
[0036]
As described above, according to the operation status monitoring apparatus 10 of this example, the sampling interval in the data acquisition unit 12 is updated based on the past data acquisition time so that it is an appropriate time with a margin. So, for example, if the latest data acquisition time tends to be longer, the sampling interval is updated accordingly, and if the latest data acquisition time tends to be shorter, Updated to shorten the sampling interval. As a result, data can be acquired reliably and at the shortest sampling interval, and highly accurate information can be acquired.
[0037]
In addition, when the sampling interval setting unit 14 monitors the data acquisition status in the data acquisition unit 12 and cannot acquire all data within the set sampling interval, the sampling interval is extended from the current time. If the data acquisition cannot be completed due to unforeseen circumstances, resetting the sampling interval to an extended time from the current time, It is possible to return to a state where data acquisition can be completed. As a result, it is possible to prevent a state in which data cannot be acquired from continuing, and to obtain accurate information. After the resetting, the sampling interval is updated based on the past data acquisition time so as to be optimum as described above.
[0038]
As mentioned above, although one Embodiment of this invention was described, the specific aspect which this invention can take is not limited to this at all.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a schematic configuration of an operation status monitoring system according to an embodiment of the present invention.
FIG. 2 is a graph exemplifying a transition of a sampling interval updated by a sampling interval setting unit of the present embodiment.
FIG. 3 is a block diagram showing a schematic configuration of an operation status monitoring apparatus according to the present embodiment.
FIG. 4 is a flowchart showing a processing procedure in the sampling interval setting means of the present embodiment.
FIG. 5 is a flowchart showing a processing procedure in the sampling interval setting means of the present embodiment.
FIG. 6 is an explanatory diagram showing a display example in the display processing means and the display device of the present embodiment.
FIG. 7 is an explanatory diagram showing a display example in the display processing means and the display device of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation condition monitoring system 2 NC machine tool 3 Network 10 Operation condition monitoring apparatus 12 Data acquisition means 13 Acquisition time storage means 14 Sampling interval setting means 15 Operation data storage means 16 Cumulative time calculation / update means 17 Accumulated time storage means 18 Display Processing means 20 Display device

Claims (3)

An operation status monitoring device that connects to each NC device of a plurality of NC machine tools provided with an NC device, acquires data from each NC device, and monitors the operation status of each NC machine tool,
Sampling interval setting means for setting a time interval for acquiring data from each NC device;
Data fetching means for receiving data related to the operating status of each NC machine tool from the NC device at each time interval set by the sampling interval setting means and measuring the time required for the acquisition each time the data is acquired When,
Operation data storage means for storing data on the operation status acquired by the data fetching means for each NC machine tool;
Acquisition time storage means for storing the acquisition time measured by the data capture means;
Data output means for outputting the data stored in the operation data storage means to the outside,
The operating condition monitoring apparatus, wherein the sampling interval setting means is configured to update the time interval based on a past acquisition time stored by the acquisition time storage means. The sampling interval setting means monitors the data acquisition status in the data acquisition means, and when the data acquisition cannot be completed within the time interval, the time interval is reset to a time extended from the current time. The operation status monitoring device according to claim 1, wherein the operation status monitoring device is configured to be set. Based on the operation data stored by the operation data storage means, a cumulative time calculation means for calculating the cumulative time for the operating state of each NC machine tool;
Cumulative time storage means for storing cumulative time data calculated by the cumulative time calculation means;
The data output means is configured to output the accumulated time data stored in the accumulated time storage means or the accumulated time data and the data stored in the operation data storage means to the outside. The operating status monitoring device described.

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