Diagnostic device, distribution board, control board, diagnostic method and storage medium

Abstract

The present disclosure provides a diagnostic device, a distribution board, a control board, a diagnostic method and a storage medium. The diagnostic device comprises: an electrical information input unit that inputs electrical information supplied to a mechanical device; and a diagnostic unit that diagnoses the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation.

Description

Technical Field

[0001] The present disclosure relates to a diagnostic device, a distribution board, a control board, a diagnostic method, and a storage medium for diagnosing a mechanical device or the like. Background Art

[0002] Patent document 1 discloses a technology for diagnosing abnormalities in mechanical devices such as a motor and its accessories when they deteriorate based on an operation amount of an operation signal input from a motor drive device and a state amount of the motor having a predetermined correlation with the operation amount.

[0003] [Reference document]

[0004] [Patent document]

[0005] [Patent Document 1] (Japan) Patent Publication No. 2013-223284 Summary of the invention

[0006] [Technical issues to be solved]

[0007] However, in the prior art, in order to measure electrical information such as the current and electric power supplied to the mechanical device for a long time and diagnose the abnormality of the equipment, a memory, a server, etc. are required to store the huge amount of electrical information for a long time. In addition, it is also necessary to extract necessary information from the electrical information recorded for a long time to compare it with the normal value to determine whether the equipment has an abnormality. In this way, in order to diagnose the mechanical device, not only resources for utilizing a large amount of electrical information are required, but also operations such as processing the recorded information are required. Therefore, there is still room for further improvement in the diagnosis of the status of the mechanical device.

[0008] The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a diagnostic device that can easily diagnose the state of a mechanical device or the like.

[0009] [Technical solution]

[0010] In order to solve the above problems and achieve the above purposes, the diagnostic device disclosed in the present invention comprises: an electrical information input unit that inputs electrical information supplied to a mechanical device; and a diagnostic unit that diagnoses the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation.

[0011] [Beneficial Effects]

[0012] According to the present disclosure, there is an effect that the state of a mechanical device or the like can be easily diagnosed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] [ Figure 1A ] Schematic diagram of the diagnostic device and the mechanical device to be diagnosed according to the present embodiment

[0014] [ Figure 1B ] Schematic diagram of the diagnostic device and the mechanical device to be diagnosed according to the present embodiment

[0015] [ Figure 2 ] Schematic diagram of an example of the configuration of an overload relay

[0016] [ Figure 3 ] Schematic diagram of the functional structure of the diagnostic device

[0017] [ Figure 4 ] Flowchart for explaining the operation of the diagnostic device

[0018] [ Figure 5 ] Timing diagram for explaining the operation of the diagnostic device

[0019] [ Figure 6 ] Timing diagram for explaining the operation of the diagnostic device

[0020] [ Figure 7 ] Flowchart for explaining the operation of the diagnostic device

[0021] [ Figure 8 ] Timing diagram for explaining the operation of the diagnostic device

[0022] [ Fig. 9 ] Timing diagram for explaining the operation of the diagnostic device

[0023] [ Fig.10 ] Schematic diagram of the hardware structure of the diagnostic device

[0024] [Explanation of symbols]

[0025] 1: Server

[0026] 2: Circuit breaker for wiring

[0027] 4: Diagnostic device

[0028] 9: Load

[0029] 40: Diagnosis Department

[0030] 41: Electrical information input unit

[0031] 42: Operation command generation unit

[0032] 43: One cycle power calculation unit

[0033] 44: One cycle power retention unit

[0034] 45: Ministry of Communications

[0035] 46a: Electricity difference calculation unit

[0036] 46b: Estimation Department

[0037] 46c: Power threshold

[0038] 46d: Notification Department

[0039] 47a: Current difference calculation unit

[0040] 47b: Estimation Department

[0041] 47c: Current threshold

[0042] 47d: Notification Department

[0043] 300-1: First Mechanical Device

[0044] 300-2: Second Mechanism DETAILED DESCRIPTION

[0045] The following describes a method for implementing the present disclosure with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to this embodiment. In addition, in the description of the following drawings, the same or similar parts are given the same or similar symbols. In addition, although the embodiments shown below illustrate the device and method for concretizing the technical idea of ​​the present disclosure, the structure and configuration of the components involved in the technical idea of ​​the present disclosure are not limited to the following forms. Various deformations and changes can be made to the technical idea of ​​the present disclosure within the technical scope specified by the claims recorded in the claims.

[0046] Figure 1A and Figure 1B Schematic diagram of the diagnostic device of the present embodiment and the mechanical device as the diagnostic object. The diagnostic system 100 comprises: a server 1; a main distribution circuit breaker for a commercial system installed on a distribution board, that is, a distribution circuit breaker 2; a first mechanical device 300-1; a second mechanical device 300-2; a plurality of (plural) in-disk machines installed on a distribution board 101-1; a plurality of in-disk machines installed on a distribution board 101-2; and a diagnostic device 4. It should be noted that the diagnostic system 100 may also be a configuration in which a control device such as a PLC (programmable logic controller) is provided in place of the server 1. In addition, the diagnostic system 100 may also be a configuration in which a control board is provided in place of the distribution board 101-1 and the distribution board 101-2, respectively.

[0047] The first mechanical device 300-1 and the second mechanical device 300-2 are devices installed on a production line, such as a rolling processing device, a conveyor, a press machine, a welding machine, a cleaning machine, a semiconductor manufacturing device, etc. For example, when the first mechanical device 300-1 is a rolling processing device and the second mechanical device 300-2 is a press device, the steps of rolling a metal processing material having a predetermined plate thickness and punching out a component from the workpiece after rolling are included. The first mechanical device 300-1 and the second mechanical device 300-2 are devices that perform one cycle operation according to a sequence program, a basic program, etc. One cycle is sometimes also referred to as "one shot" or "one step". Hereinafter, when the distributor 101-1 and the distributor 101-2 are not distinguished, they are sometimes collectively referred to as "distributor 101". In addition, when the first mechanical device 300 - 1 and the second mechanical device 300 - 2 are not distinguished, they may be collectively referred to as “mechanical device 300 ”.

[0048] The plurality of in-panel devices installed on the distribution panel 101 are power distribution devices. The in-panel devices include, for example: a main distribution circuit breaker in the distribution panel 101, that is, a distribution circuit breaker 5; two distribution circuit breakers 6a and 6b connected to the secondary side of the distribution circuit breaker 5; an electromagnetic contactor 7a connected to the secondary side of the distribution circuit breaker 6a; an electromagnetic contactor 7b connected to the secondary side of the distribution circuit breaker 6b; an overload relay 8a connected to the secondary side of the electromagnetic contactor 7a; and an overload relay 8b connected to the secondary side of the electromagnetic contactor 7b.

[0049] The primary side of the circuit breaker 2 is connected to the system power supply 200, and the secondary side of the circuit breaker 2 is connected to the primary side of the circuit breaker 5 via the electric wire 16. The secondary side of the circuit breaker 5 is connected to the primary sides of the circuit breakers 6a and 6b via the connecting electric wire 18, respectively.

[0050] The secondary side of the wiring circuit breaker 6a is connected to the electromagnetic contactor 7a via the connecting wire 18. The secondary side of the electromagnetic contactor 7a is connected to the overload relay 8a via the connecting wire 18. The secondary side of the overload relay 8a is connected to the load 9 via the connecting wire 18. The load 9 is, for example, a motor driven by power supplied from a system power supply 200 (three-phase AC power supply, etc.), a drive device that drives the motor, and the like.

[0051] The secondary side of the wiring breaker 6b is connected to the electromagnetic contactor 7b via the connection wire 18. The secondary side of the electromagnetic contactor 7b is connected to the overload relay 8b via the connection wire 18. The secondary side of the overload relay 8b is connected to the load 9 via the connection wire 18.

[0052] The wiring breaker 6a, electromagnetic contactor 7a, and overload relay 8a all have a function of collecting electrical quantities and a communication function of transmitting electrical information indicating the contents of the collected electrical quantities to the diagnostic device 4. The electrical quantities are, for example, current, voltage, power, and the like. Figure 1A and Figure 1B Schematic diagram of the overload relay 8a having the above-mentioned function.

[0053] The sensor 14 is an electrical quantity detection sensor that detects an electrical quantity and transmits it to the diagnostic device 4, and can be installed at any position in the distribution board 101. When the sensor 14 has a current detection unit that detects current, for example, the sensor 14 detects the current flowing in the connection wire 18 arranged between the electromagnetic contactor 7b and the overload relay 8b, and transmits information indicating the value of the detected current as electrical information to the diagnostic device 4 via the communication line 17. In addition, when the sensor 14 has a power detection unit that detects power, for example, the sensor 14 detects the instantaneous value of the AC voltage applied to the connection wire 18 and the instantaneous value of the AC current flowing into the load 9, calculates power based on these detection values, and then transmits information indicating the calculated value of power to the diagnostic device 4 via the communication line 17 as electrical information.

[0054] The diagnostic device 4 collects electrical information and diagnoses the state of the mechanical device 300 having the load 9 based on the collected electrical information. The details of the diagnostic method will be described later. It should be noted that the diagnostic result of the diagnostic device 4 can be sent to, for example, the server 1 via the communication line 3. The communication method of the communication line 3 can use a wireless communication method or a wired communication method. In addition, the diagnostic and communication functions of the diagnostic device 4 can also be implemented in the in-disk machine set on the distribution board or the control board 101.

[0055] Next refer to Figure 2 A configuration example of the overload relay 8a as an example of the in-pan device will be described.

[0056] Figure 2Schematic diagram of an example of the configuration of an overload relay. The overload relay 8a is an electronic overload relay having a contact (contact) relay such as a mechanical relay or a contactless (non-contact) relay such as a semiconductor relay. The overload relay 8a, for example, has a relay contact 22a formed by any one of the above-mentioned mechanical relay and semiconductor relay, a calculation unit 22b, a power supply unit 22c, an electromagnetic unit 22d, an information transmission circuit 22g as a means of transmitting electrical information to the diagnostic device 4, and a voltage sensor 22f. These components can be mounted on a substrate 50, for example.

[0057] The calculation unit 22 b is a CPU (also referred to as a Central Processing Unit, a central processing device, a processing device, a calculation device, a microprocessor, a microcomputer, a processor, a DSP (Digital Signal Processor)), a system LSI (Large Scale Integration), or the like.

[0058] The current sensor 19 is a current detection element such as a shunt resistor for detecting the current flowing in the connection wire 18. It should be noted that the current sensor 19 can be any sensor as long as it can detect the current, and can be a sensor such as a CT (Current Transformer) or a Rogowski coil. Information indicating the value of the current detected by the current sensor 19, that is, current information, is input to the calculation unit 22b, and the calculation unit 22b sends the current information to the diagnostic device 4 in a wired or wireless manner.

[0059] When the calculation unit 22b to which the current information is input detects a current reaching a predetermined threshold current, the trip signal (Trip signal) 4a is input to the power supply unit 22c. The power supply unit 22c has a trip capacitor for accumulating electric charge, and when the trip signal 4a is input, the electric charge accumulated in the trip capacitor is discharged. Accordingly, the electromagnetic unit 22d can be driven, and the contact mechanism (relay contact 22a) can be tripped (operated). By causing the relay contact 22a to perform a tripping action, the excitation of the coil of the electromagnetic contactor 7a is released, and the connecting wire 18 can be opened. After a predetermined time has passed after the tripping action, the calculation unit 22b inputs a reset signal to the power supply unit 22c, and accordingly, the electromagnetic unit 22d is driven by the discharge of the reset capacitor of the power supply unit 22c, and the contact mechanism (relay contact 22a) can be reset.

[0060] The voltage sensor 22f can obtain voltage information from, for example, the voltage detection wiring directly connected to each of the U-phase, V-phase, and W-phase connection wires 18, and input the voltage information into the calculation unit 22b. Figure 2Although the configuration in which current information is transmitted as electrical information is shown in FIG. 1 , a configuration in which power is calculated from the detected current and voltage and the calculated power is transmitted as electrical information may be adopted.

[0061] Next, refer to Figure 3 A configuration example of the diagnostic device 4 will be described. Figure 3 Schematic diagram of the functional structure of the diagnostic device. The diagnostic device 4 comprises: an electrical information input unit 41, which inputs electrical information measured by a power distribution machine connected to the load 9; an operation instruction generation unit 42, which generates an instruction to instruct the operation of the mechanical device 300, that is, an operation instruction, or relays the operation instruction from the server 1; and a diagnostic unit 40, which diagnoses the state of the load 9, the state of the mechanical device 300 including the load 9, etc. based on the electrical information and the operation instruction. It should be noted that, with respect to the operation instruction, Figure 1B As shown, the electromagnetic contactor 7a or the electromagnetic contactor 7b can be directly entered from the server 1, and the branched operation command signal can enter the diagnostic device 4, or as shown in FIG. Figure 1A As shown, the electromagnetic contactor 7 a or the electromagnetic contactor 7 b can also be accessed via the diagnostic device 4 .

[0062] The operation instruction includes a start instruction and a stop instruction. The start instruction is an instruction to instruct the mechanical device 300 to start one cycle of operation. The stop instruction is an instruction to instruct the mechanical device 300 to end one cycle of operation. For example, if the time point when the start command is issued to the mechanical device 300 is regarded as the starting time point of "one cycle", and the time point when the stop command is issued to the mechanical device 300 is regarded as the ending time point of "one cycle", then the series of actions from the starting time point to the ending time point can be regarded as "one cycle". It should be noted that "one cycle" is not limited to the series of actions from the above-mentioned starting time point to the ending time point, for example, it can also be a series of actions from the starting time point when the start command is issued to the mechanical device 300 to the starting time point (next starting time point) when the start command is issued to the mechanical device 300 after the starting time point.

[0063] The diagnostic device 4 acquires electrical information of each cycle of the mechanical device 300, and compares and analyzes the acquired electrical information with electrical information acquired in the past, pre-set electrical information, etc., thereby assisting in improving production efficiency in units of one cycle, discovering defects of the mechanical device 300 such as insulation degradation of the mechanical device 300, etc.

[0064] For example, in the case of a pressure device, one cycle of operation may be an action in which a tool approaches a metal plate by inputting a start command, and the tool is pressed against a workpiece to cut out the workpiece, and the tool that has cut out the workpiece is returned to a predetermined position by inputting a stop command. In addition, in the case of a pump, one cycle of operation may be an action of continuously pumping water from the input of a start command to the input of a stop command. It should be noted that an operation command may also be sent from an external device of the diagnostic device 4. The diagnostic unit 40 diagnoses the state of the mechanical device 300 based on the electrical information input when the mechanical device 300 performs one cycle of operation.

[0065] In addition, the diagnostic device 4 includes: a one-cycle power calculation unit 43, which calculates the integrated value of the power obtained from the machine in the disk according to each cycle; a one-cycle power retention unit 44, which retains the one-cycle power; and a communication function unit, i.e., a communication unit 45, which sends information representing the value of the one-cycle power to, for example, the server 1.

[0066] The diagnosis unit 40 includes a power difference calculation unit 46a, an estimation unit 46b, a notification unit 46d, a current difference calculation unit 47a, an estimation unit 47b, and a notification unit 47d.

[0067] The power difference calculation unit 46a calculates the difference (power difference) between the power amounts for one cycle at different time points in time series, based on the defined normal power amount for one cycle when the mechanical device 300 performs one cycle operation.

[0068] The estimation unit 46b inputs the power difference calculated by the power difference calculation unit 46a, and estimates the cause of the abnormality of the mechanical device 300 based on the power difference and the power threshold 46c. The power threshold 46c can be set based on electrical information acquired when the mechanical device 300 is normal, for example.

[0069] The notification unit 46 d notifies the server 1 provided outside the diagnostic device 4 , for example, of the content indicating the cause of the abnormality estimated by the estimation unit 46 b .

[0070] The current difference calculation unit 47a calculates the difference in current during one-cycle operation (current difference), for example, the difference between the maximum value, minimum value, and average value of the current during one cycle, based on the defined one-cycle current information that is normal when the mechanical device 300 performs one-cycle operation at different time points in the time series.

[0071] The estimation unit 47b estimates the cause of the abnormality of the mechanical device 300 based on the current difference calculated by the current difference calculation unit 47a and the current threshold 47c. The current threshold 47c can be set based on electrical information acquired when the mechanical device 300 is normal, for example.

[0072] The notification unit 47 d notifies the server 1 provided outside the diagnostic apparatus 4 , for example, of the content indicating the cause of the abnormality estimated by the estimation unit 47 b .

[0073] Next refer to Figures 4 to 9 The operation of the diagnostic device 4 will be described. Figures 4 to 6 After explaining the diagnostic operation using electricity, refer to Figures 7 to 9 The diagnostic operation using electric current will be described.

[0074] Figure 4 is a flowchart for explaining the operation of the diagnostic device. Figure 5 is a timing diagram for explaining the operation of the diagnostic device. Figure 6 This is a timing chart for explaining the operation of the diagnostic device. Figures 4 to 6 This is a diagram for explaining the operations of the power difference calculation unit 46a, the estimation unit 46b, and the notification unit 46d.

[0075] like Figure 5 and Figure 6 As shown, after an operation command for one cycle operation is generated (step S1), electrical information (electric power) is input to the diagnosis device 4 (step S2).

[0076] The power difference calculation unit 46a compares the value of the power measured in one cycle operation from the time when the start command is input to the time when the stop command is input at the time t1 and the value of the power measured in the next cycle operation, thereby calculating the difference between the values ​​of the power measured in the two one-cycle operations (step S3). "Next cycle operation" refers to, for example, the action from the time when the start command is input to the time when the stop command is input at the time t4. It should be noted that the power used by the power difference calculation unit 46a can be the power of one cycle operation measured at continuous time points in the time series, or the power of one cycle operation measured at any time point that is not continuous in the time series.

[0077] The estimation unit 46b determines whether the power difference exceeds the power threshold 46c (step S4). If the power difference is less than the power threshold 46c (step S4, No), the process after step S1 is repeated. If the power difference exceeds the power threshold 46c (step S4, Yes), the process of step S5 is executed.

[0078] In step S5, the estimation unit 46b compares the values ​​of the respective electric energy amounts during two one-cycle operations measured at different time points in time series, thereby determining whether the electric energy has an increasing trend (step S5).

[0079] like Figure 5 As shown, for example, when the amount of electric power during one cycle of operation from time t3 to time t4 has an increasing trend relative to the amount of electric power during one cycle of operation from time t1 to time t2 (step S5, Yes), the estimation unit 46b can infer that the first abnormal cause has occurred (step S6). The first abnormal cause can be considered to be, for example, that the wear of the tool of the press causes the driving power of the tool to temporarily increase when the workpiece (processed object) is processed.

[0080] like Figure 6 As shown in FIG. 1 , when the amount of electric power during one cycle of operation from time t3 to time t4 is less than the amount of electric power during one cycle of operation from time t1 to time t2 (step S5, No), the estimation unit 46b can infer that a second abnormal cause has occurred (step S7). The second abnormal cause can be considered to be, for example, that a gear of a tool of the press machine is broken or damaged, resulting in a temporary decrease in the amount of driving electric power of the tool when the workpiece is processed.

[0081] The notification unit 46d notifies the server 1 etc. of the abnormality cause estimated by the estimation unit 46b (step S8). The server 1 receiving the notification information from the notification unit 46d may display message information corresponding to the notification content on a display unit, or may emit a sound or warning sound corresponding to the notification content through a sound reproducing unit such as a speaker.

[0082] Figure 7 is a flowchart for explaining the operation of the diagnostic device. Figure 8 is a timing diagram for explaining the operation of the diagnostic device. Fig. 9 This is a timing chart for explaining the operation of the diagnostic device. Figures 7 to 9 This is a diagram for explaining the operations of the current difference calculation unit 47a, the estimation unit 47b, and the notification unit 47d.

[0083] like Figure 8 and Fig. 9 As shown, after the operation command for one cycle operation is generated (step S11), the electrical information (current) is input to the diagnosis device 4 (step S12).

[0084] The current difference calculation unit 47a compares the current value measured in one cycle of operation from the input of the start command at time t1 to the input of the stop command at time t2 with the current value measured in the next cycle of operation, thereby calculating the difference between the current values ​​measured in the two one-cycle operations (step S13). It should be noted that the current used by the current difference calculation unit 47a can be the current in one cycle of operation measured at a continuous moment in the time series, or the current in one cycle of operation measured at an arbitrary moment that is not continuous in the time series.

[0085] The estimation unit 47b determines whether the current difference exceeds the current threshold 47c (step S14). If the current difference is less than the current threshold 47c (step S14, No), the process after step S11 is repeated. If the current difference exceeds the current threshold 47c (step S14, Yes), the process of step S15 is executed.

[0086] In step S15, the estimation unit 47b compares the current values ​​of two one-cycle operations measured at different time points in time series, thereby determining whether the current has an increasing trend (step S15).

[0087] like Figure 8 As shown, when the current during one cycle operation, for example, from time t3 to time t4, tends to increase compared to the current during one cycle operation, for example, from time t1 to time t2 (step S15, Yes), the estimation unit 47b can infer that the above-mentioned first abnormal cause has occurred (step S16).

[0088] like Fig. 9 As shown, when the current during one cycle operation, for example, from time t3 to time t4, tends to decrease compared to the current during one cycle operation, for example, from time t1 to time t2 (step S15, No), the estimation unit 47b can infer that the above-mentioned second abnormal cause has occurred (step S17).

[0089] The notification unit 47d notifies the server 1 etc. of the abnormality cause estimated by the estimation unit 47b (step S18). The server 1 which has received the notification information from the notification unit 47d may display, for example, message information corresponding to the notification content on a display unit, or may emit, for example, a sound or warning sound corresponding to the notification content through a sound reproducing unit such as a speaker.

[0090] Fig.10Schematic diagram of the hardware structure of the diagnostic device. The functions of the diagnostic device 4 can be realized by any hardware or a combination of hardware and software. For example, the diagnostic device 4 includes a drive device 21, an auxiliary storage device 22, a memory device 23, a CPU 24, an interface device 25, a display device 26 and an input device 27, and these components can be connected via a bus 29.

[0091] The program for realizing various functions of the diagnostic device 4 can be provided by, for example, a storage medium 28. The storage medium 28 is, for example, a removable storage device such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), or a USB (Universal Serial Bus) memory. When the storage medium 28 storing the program is placed in the drive device 21, the program can be installed from the storage medium 28 to the auxiliary storage device 22 via the drive device 21. In addition, the program can be downloaded from another computer via a communication network and installed in the auxiliary storage device 22.

[0092] The auxiliary storage device 22 can store various installed programs, and can also store necessary files, data, etc. When a program startup instruction appears, the memory device 23 can read the program from the auxiliary storage device 22 and store it. The CPU 24 can execute various programs stored in the auxiliary storage device 22, thereby realizing various functions of the diagnostic device 4 through the program. When realizing the diagnostic device 4, the program for the diagnostic device 4 can be stored in the auxiliary storage device 22 in advance, and then by making the CPU 24 execute the program, the diagnostic unit 40 of the diagnostic device 4 can be realized.

[0093] The interface device 25 can be used as an interface for connecting the diagnostic device 4 to the communication line 3. The display device 26 can display a GUI (Graphical User Interface) according to a program executed by the CPU 24, for example. The input device 27 can be used to allow an operator, a manager, etc. of the diagnostic device 4 to input various operation instructions related to the diagnostic device 4.

[0094] As described above, the diagnostic device 4 of this embodiment includes: an electrical information input unit that inputs electrical information supplied to a mechanical device; and a diagnostic unit that diagnoses the state of the mechanical device based on the electrical information input when the mechanical device performs one cycle of operation.

[0095] In the prior art, in order to measure electrical information such as current and power supplied to a mechanical device for a long time and diagnose abnormalities of the equipment, a memory, server, etc. are required to store the expanded electrical information for a long time. In addition, it is also necessary to extract necessary information from the electrical information recorded for a long time to compare it with the normal value to determine whether the equipment has abnormalities. In this way, in order to diagnose the mechanical device, not only resources for utilizing a large amount of electrical information are required, but also operations such as processing the recorded information are required. Therefore, there is still room for further improvement in the diagnosis of the status of the mechanical device.

[0096] In contrast, according to the diagnostic device 4 of the present embodiment, the diagnostic unit 40 can use the electrical information measured during one cycle of operation to diagnose the mechanical device by virtue of the above-mentioned configuration. Therefore, it is not necessary to use a large amount of electrical information for diagnosis as in the prior art, so the capacity of the storage medium for recording the electrical information is reduced, and resources can be used effectively. In addition, since it is not necessary to perform an operation of processing a large amount of information recorded in the storage medium, it is possible to quickly diagnose the state of the mechanical device.

[0097] In addition, the diagnostic device 4 of the present embodiment can grasp the amount of electric power used in each cycle of operation, so energy saving management (EMS) can be realized in units of processes. In addition, since the trend of the current trend that deviates from the current trend measured in normal times can be detected, the abnormality of the mechanical device 300 can be dealt with in advance. In addition, even if the workpiece processed by the mechanical device 300 includes defective products, the time point when the defective product occurs can be determined by using the electrical information of each cycle measured in the order of the time series. In addition, by managing the amount of electric power used in each cycle and the trend of the current, the maintenance knowledge of the equipment can be accumulated. In addition, by diagnosing the change trend of the current trend in each cycle, the deterioration condition of the equipment (wear of the tool, etc.) can be grasped, thereby improving the product quality. In addition, in the case of deviation from the current trend, since a notification of the content different from the normal time can be made, it is possible to prevent quality deterioration (preventive maintenance). In addition, signs and tendencies of abnormalities, failures, etc. can be detected in advance and used for inspection and maintenance (assisting restoration). In addition, power consumption can be monitored in units of one cycle, thereby achieving fine-grained energy-saving management and improving production efficiency.

[0098] In addition, the diagnostic method of the present embodiment includes: a step of inputting electrical information supplied to the mechanical device by the diagnostic device; and a step of diagnosing the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation. In addition, the mechanical diagnostic program of the present embodiment can cause a computer to execute the following steps, namely, the step of inputting electrical information supplied to the mechanical device and the step of diagnosing the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation. In addition, the present invention also provides a computer-readable storage medium, in which the mechanical diagnostic program as described above is stored.

[0099] Based on the above, a diagnostic device can be provided, comprising: an electrical information input unit that inputs electrical information supplied to a mechanical device; and a diagnostic unit that diagnoses the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation.

[0100] The electrical information input unit inputs electrical information measured by a power distribution device connected to the mechanical device.

[0101] Among them, the diagnosis unit includes: an electric power difference calculation unit, which calculates the difference in electric power during each one-cycle operation based on the multiple electrical information input when the mechanical device performs one-cycle operation; and an estimation unit, which estimates the cause of the abnormality of the mechanical device based on the difference in electric power and the electric power threshold.

[0102] Among them, the diagnosis unit includes: a current difference calculation unit, which calculates the difference in current during each one-cycle operation based on the multiple electrical information input when the mechanical device performs one-cycle operation; and an estimation unit, which estimates the cause of the abnormality of the mechanical device based on the current difference and the current threshold.

[0103] The diagnostic device further includes a notification unit configured to notify notification information indicating that an abnormality has occurred in the mechanical device when the diagnostic unit determines that the state of the mechanical device is abnormal.

[0104] The mechanical device is a calendering device, a conveyor, a press, a welding machine, a cleaning machine or a semiconductor manufacturing device.

[0105] In addition, a distribution board and a control board, each of which is equipped with the above-mentioned diagnostic device, can also be provided.

[0106] In addition, a diagnostic method can be provided, comprising: a step in which a diagnostic device inputs electrical information supplied to a mechanical device; and a step in which the diagnostic device diagnoses the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation.

[0107] In addition, a computer-readable storage medium storing a mechanical diagnostic program can be provided, which enables a computer to execute: a step of inputting electrical information supplied to a mechanical device; and a step of diagnosing the state of the mechanical device based on the electrical information input when the mechanical device performs a cycle of operation.

[0108] Finally, it should be noted that the configuration shown in the above embodiment is only an example of the content of the present disclosure, and it can also be combined with other well-known technologies. In addition, part of the above configuration can be omitted or changed without departing from the scope of the present disclosure.

Claims

1. A diagnostic device comprising: an electrical information input unit that inputs electrical information measured when a mechanical device performs one cycle of operation according to an operation command, wherein the operation command is a command for instructing the operation of the mechanical device, and the electrical information corresponds to at least one of a value of electric power and a value of current of the mechanical device during the one cycle of operation; a holding unit for holding the value of the electric energy measured during the one cycle operation; and a diagnosis unit for diagnosing the state of the mechanical device based on the electrical information input by the electrical information input unit, The operation instruction includes a start instruction and a stop instruction, wherein the start instruction is used to indicate the start of the one-cycle operation, and the stop instruction is used to indicate the end of the one-cycle operation. The diagnostic unit compares the values ​​of the electric energy measured in the one-cycle operation twice before and after in a time series, and based on the comparison result, infers different causes of the abnormality when there is an increasing trend in the time series and when there is a decreasing trend in the time series.

2. The diagnostic device according to claim 1, further comprising: an operation instruction generating unit that generates the operation instruction or relays an operation instruction from an external server as the operation instruction, The electrical information is measured by a power distribution device connected to the mechanical device.

3. The diagnostic device according to claim 1, wherein: The diagnostic unit comprises: an electric power difference calculation unit for calculating the difference in electric power during each one-cycle operation based on the plurality of electrical information input when the mechanical device performs one-cycle operation; and The estimating unit estimates a cause of abnormality of the mechanical device based on the difference in the electric power amounts and an electric power amount threshold value.

4. The diagnostic device according to claim 1, wherein: The diagnostic unit comprises: a current difference calculation unit for calculating the difference in current during each one-cycle operation based on the plurality of electrical information input when the mechanical device performs one-cycle operation; and An estimating unit estimates a cause of abnormality of the mechanical device based on the difference in the currents and a current threshold value.

5. The diagnostic device according to any one of claims 1 to 4, further comprising: A notification unit notifies notification information indicating that an abnormality has occurred in the mechanical device when the diagnosis unit determines that the state of the mechanical device is abnormal.

6. The diagnostic device according to any one of claims 1 to 4, wherein: The mechanical device is a calendering device, a conveyor, a press, a welding machine, a cleaning machine or a semiconductor manufacturing device.

7. A distribution board comprising the diagnostic device according to any one of claims 1 to 6.

8. A control panel comprising the diagnostic device according to any one of claims 1 to 6.

9. A diagnostic method, which is a diagnostic method performed by a diagnostic device, comprising the following steps: inputting electrical information measured when a mechanical device performs one cycle of operation according to an operation command, wherein the operation command is a command for instructing the operation of the mechanical device, and the electrical information corresponds to at least one of a value of electric power and a value of current of the mechanical device during the one cycle of operation; Maintaining the value of the amount of electric power measured during the one cycle of operation; and diagnose the state of the mechanical device according to the input electrical information, in, The operation instruction includes a start instruction and a stop instruction, wherein the start instruction is used to indicate the start of the one-cycle operation, and the stop instruction is used to indicate the end of the one-cycle operation. In the step of performing diagnosis, the values ​​of the electric energy measured in the one-cycle operation twice before and after in a time series are compared, and based on the result of the comparison, different causes of the abnormality are inferred when there is an increasing trend in the time series and when there is a decreasing trend in the time series.

10. A computer-readable storage medium storing a machine diagnostic program, the machine diagnostic program causing a computer to execute the following steps: inputting electrical information measured when a mechanical device performs one cycle of operation according to an operation command, wherein the operation command is a command for instructing the operation of the mechanical device, and the electrical information corresponds to at least one of a value of electric power and a value of current of the mechanical device during the one cycle of operation; Maintaining the value of the amount of electric power measured during the one cycle of operation; and diagnose the state of the mechanical device according to the input electrical information, in, The operation instruction includes a start instruction and a stop instruction, wherein the start instruction is used to indicate the start of the one-cycle operation, and the stop instruction is used to indicate the end of the one-cycle operation. In the step of performing diagnosis, the values ​​of the electric energy measured in the one-cycle operation twice before and after in a time series are compared, and based on the result of the comparison, different causes of the abnormality are inferred when there is an increasing trend in the time series and when there is a decreasing trend in the time series.

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