JP3769420B2 - Equipment operating state measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a new facility operation state measuring instrument which can accurately, easily, and automatically measure a continuance and an integrated physical value in various states of facilities and obtain various data needed to improve the operation efficiency of the facilities and save the energy. SOLUTION: This facility operation state measuring instrument 1 is equipped with a physical quantity measuring means 3 which measures physical quantities for deciding the respective operation states of the facilities 10, a time measuring means 20, and an arithmetic processing means 21. The arithmetic processing means 21 decides the operation state of the facilities 10 according to the physical quantities measured by the physical quantity measuring means 3, the time measuring means 21 measures the continuance by the operation states, and the arithmetic processing means 21 integrates the continuance and the physical quantities in the continuance by the corresponding operation states.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation state measuring apparatus and method for various facilities, and in particular, measures physical quantities corresponding to each operation state such as a preparation state, an operation state, a standby state, and a stop state of various facilities to determine each operation state. In addition, the present invention relates to a facility operating state measuring apparatus and method for automatically measuring the accumulated time from the duration of each operating state.
[0002]
[Prior art]
Measuring the operating status of various equipment such as machine tools, molding machines, and heating furnaces in facilities such as factories on a daily basis and recording them will improve the equipment operating rate and equipment. It is useful as basic data for planning maintenance and future capital investment and as data for promoting energy conservation. The operating state of the equipment to be measured includes, for example, an operating state in which work such as machining is performed on the workpiece, a standby state in which the workpiece is awaiting work, a preparation state such as setup, and a stopped state due to failure of the equipment itself. .
[0003]
As a conventional technique for measuring the duration of the operating state of such equipment, for example, an operating time measuring device described in Japanese Patent Application Laid-Open No. 50-32962 is known. In this prior art, the load current of the actual drive unit in the facility is detected by a load current detection relay, and this detection value is added to measure the actual operating time of the actual drive unit.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned prior art, it is possible to detect the operating state from the measurement of the load current of the drive unit and measure the integration result of only the actual operating time, but the duration time in various operating states of the equipment Since it cannot be accumulated, it has not been possible to obtain basic data necessary for planning the improvement of equipment operation rate, equipment maintenance, and future equipment investment. For example, in the prior art, it is impossible to determine whether the operating time is due to a decrease in production or whether it is due to a machine trouble or a work waiting due to a work plan error.
[0005]
In order to promote energy conservation, it is necessary to shorten the operating state such as the standby state for waiting for workpieces and the stop state associated with equipment troubles as well as the operating state that actually contributes to production. Although time measurement and physical quantity measurement are required, the above-described conventional technology cannot perform measurement according to the operation state such as the standby state and the stop state, and thus cannot obtain necessary data.
[0006]
Therefore, the object of the present invention is to be able to automatically and easily measure various operating states of the equipment, and to obtain various data necessary for energy saving, improvement of operating rate, etc. The object is to provide an equipment operating state measuring apparatus and method.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an equipment operating state measuring apparatus according to the present invention comprises physical quantity measuring means for measuring physical quantities for determining each operating state of equipment, time measuring means, and arithmetic processing means, and the physical quantities Based on the physical quantity measured by the measuring means, the operation state of the equipment is determined by the arithmetic processing means, the duration of the operating state for each operating state is measured by the time measuring means, the duration time and the continuation time The physical quantity in time is integrated by the arithmetic processing means for each corresponding operating state.
[0008]
The facility operating state measuring method according to the present invention measures a physical quantity for determining each operating state of the equipment, and determines the operating state of the equipment based on the measured physical quantity, while each operating state is determined. The duration of the operating state is measured, and the duration and the physical quantity at the duration are integrated for each corresponding operating state.
[0009]
The present invention measures the accumulated time and accumulated physical quantity of each operation state of the equipment by utilizing the fact that the physical quantity corresponding to each operation state of the equipment is different. As the physical quantity to be measured, the power consumption value of the facility is preferable.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to this embodiment.
[0011]
FIG. 1 shows an embodiment of the present invention. In the same figure, the code | symbol 1 has shown the equipment operation state measuring device.
[0012]
As shown in FIG. 1, the equipment operating state measuring device 1 includes a microcomputer 2, an integrating wattmeter (physical quantity measuring device) 3, a display device 4, and an auxiliary storage device 5. The microcomputer 2 and the integrated wattmeter 3, the display device 4, and the auxiliary storage device 5 are connected by interfaces 30, 40, and 50.
[0013]
The microcomputer 2 is a general-purpose device including an internal clock (time measuring means) 20, a processor (arithmetic processing means) 21, a main storage device 22, and the interfaces 30, 40, and 50.
[0014]
As the integrated wattmeter 3, for example, a commercially available one having a pulse signal output function for each unit integrated power value (for example, 1 kilowatt per hour) is used.
[0015]
The pulse signal output from the integrating wattmeter 3 is input to the microcomputer 2 via the interface 30 and used for calculating the average electric energy as will be described later.
[0016]
The display device 4 uses a commercially available display device such as a cathode ray tube type or a liquid crystal display device, and is configured to display an accumulated continuation time of each operation state via the interface 40.
[0017]
The auxiliary storage device 5 uses a commercially available auxiliary storage device such as a fixed magnetic disk (hard disk drive), a magneto-optical disk drive, a flexible disk drive, and the like, and necessary data such as an accumulated duration time and an accumulated power value of each operation state. Are stored via the interface 50.
[0018]
The facility operating state measuring apparatus 1 having the above configuration is used by interposing it in a power supply line between the facility 10 and the power supply 11 as shown by a dotted line in FIG.
[0019]
A facility operating state measuring method using the facility operating state measuring apparatus 1 having the above configuration will be described.
[0020]
First, the power consumption value in each operation state of the facility 10 is measured in advance, a detection allowable range is set for each power consumption value, and registered in the main storage device 22 or the auxiliary storage device 5 of the microcomputer 2. Keep it.
[0021]
Next, the processor 20 determines whether the facility 10 is in an operating state by determining whether or not the power value measured by the integrating wattmeter 3 is within the detection allowable range, and the determination result Thus, the duration of each operation state of the facility 10 is obtained from the value of the internal clock 20, the time measurement counter (not shown) is updated, and the power value counter (not shown) is updated. These data are integrated at predetermined unit integration times such as daily units, and the results are displayed on the display device 4 or stored in the auxiliary storage device 22.
[0022]
For example, as shown in FIG. 2, the calculation of the power value in each operation state of the facility input from the integrating wattmeter 3 through the interface 30 and the setting of the detection tolerance for the power value are performed for a predetermined time t. By calculating the difference (Pn−Pn−1) between the respective integrated power values obtained from the integrated wattmeter 3 at times Tn and Tn−1 (n> 1) every 10 minutes (for example, 10 minutes). In addition, an average power amount in each operation state is obtained in advance, and a detection allowable range for the average power amount is set in advance. The allowable detection width is set according to the average power amount in each operation state, and is, for example, within 5% above and below the average power amount.
[0023]
Based on the preset detection allowable range of the power value in this way, the processor 21 determines in which operation state the allowable detection range of the average power amount measured in the actual measurement target equipment, and each operation By increasing the time measurement counter corresponding to the state by t time, the duration time of each operation state is integrated, and by increasing the power value counter, the power value of each operation state is integrated.
[0024]
For example, in the case where the facility 10 has the power consumption state as shown in FIG. 3, in order to obtain the integrated duration and the integrated power value of each operation state, the following is performed.
[0025]
The sections Ta1 and Ta2 in the figure show the equipment preparation state. Immediately after the equipment is started up, power is supplied to the equipment control device and each drive source, but the work is still being processed, etc. Since no actual operation is performed, each drive source is in a no-load or low-load state, and the power consumption value of the entire equipment is in a low Pa state.
[0026]
Further, the sections Tb1 and Tb2 indicate a standby state where the equipment is waiting for a work, and the load of some drive sources increases, so the power consumption value of the entire equipment is a value Pb higher than Pa.
[0027]
In addition, the sections Tc1 and Tc2 indicate that the equipment is in operation, the load on each drive source increases, and the power consumption value of the entire equipment is as high as Pc.
[0028]
Furthermore, the section Td shows a stop state in which the equipment is stopped due to a failure, and power is still supplied to the control device of the equipment, but the power supply to each drive source is stopped, and the consumption of the entire equipment The power value is Pd, which is the lowest value in each operating state.
[0029]
For example, when detecting the power consumption value Pc indicating the actual operation state in the facility 10 having such a power consumption state, detection allowable ranges for the detection are set in advance as PcL and PcH. If it is within the range, the continuation time of the actual operation state is integrated (Tc1 + Tc2) and the power value of the actual operation state is integrated.
[0030]
In the above description, the actual operating states Tc1 and Tc2 have been described. However, the power consumption values Pa and Pb in these operating states also apply to other operating states such as the ready states Ta1 and Ta2, the standby states Tb1 and Tb2, and the stopped state Td. Based on the detection tolerance set in advance for Pd, the duration Ta1 + Ta2, Tb1 + Tb2, Td of the corresponding operating state is integrated, and the power consumption values Pa, Pb, Pd of each state are integrated Thus, the integrated duration and the integrated power value of each desired operating state can be obtained.
[0031]
Of the integrated power values for each operating state obtained in this way, in order to promote energy saving of equipment, it is ideal that the integrated power value other than the actual operating state is close to zero. The value can be reported to the facility manager as a management value, for example, as a daily report / monthly report, and used for energy saving promotion.
[0032]
As described above, according to the equipment operating state measuring apparatus 1 of the present embodiment, the cumulative duration time and the integrated power value of various operating states of the equipment can be automatically and accurately measured, energy saving, Various data necessary for improving the operating rate can be obtained. Further, since no manual operation is required, an accurate measurement result can be obtained and the measurement result does not vary.
[0033]
In the above embodiment, the operation state is determined based on whether or not the power consumption value of the facility is within the detection allowable range. However, the physical quantity for determining the operation state measured by the physical quantity measuring unit is the power consumption. Needless to say, the present invention is not limited to a value, and can be applied to other physical quantities as long as the physical quantity can determine each operation state of the equipment, such as a current value, a temperature at a specific part of the equipment, and the like.
[0034]
【The invention's effect】
According to the equipment operating state measuring apparatus and method according to the present invention, it is possible to automatically and accurately measure the cumulative continuation time and the physical quantity of various operating states of the equipment, and save energy and improve the operating rate. Various data necessary for achieving the above can be obtained. In addition, since no manual operation is required, there is no variation in measurement results, and accurate measurement can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing an embodiment of an equipment operating state measuring apparatus according to the present invention.
FIG. 2 is a diagram illustrating calculation of an average power value in the same embodiment.
FIG. 3 is a diagram illustrating a relationship between power consumption and time in each operation state of equipment.
[Explanation of symbols]
1: equipment operating state measuring device, 3: integrating wattmeter (physical quantity measuring means), 10: equipment, 20: internal clock (time measuring means), 21: processor (arithmetic processing means).

Claims (2)

Physical quantity measuring means for measuring the physical quantity possessed by the facility;
Time measuring means;
Arithmetic processing means,
By on the basis of the physical quantity measured by the physical quantity measuring means pre Symbol arithmetic processing means for determining the operation state of the equipment,
The operation state of the equipment is determined to be at least an active state and a standby state,
For each operating state
Measure the duration of the driving state with the time measuring means ,
The duration; and
The physical quantity in the duration and
The equipment operation state measurement apparatus characterized by integrating by the arithmetic processing means.   The equipment operation state measuring apparatus according to claim 1, wherein the physical quantity is a power consumption value of the equipment.

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