JP7434838B2 - Diagnostic equipment, distribution boards, control panels, diagnostic methods and machine diagnostic programs - Google Patents

Description

The present disclosure relates to a diagnostic device, a distribution board, a control panel, a diagnostic method, and a machine diagnostic program that diagnose a mechanical device or the like.

Patent Document 1 discloses that the motor and its auxiliary equipment are controlled based on the manipulated variable of the operating signal input from the motor drive device to the motor, and the state quantity of the motor that has a predetermined correlation with this manipulated variable. A technique for diagnosing abnormalities associated with deterioration of mechanical devices is disclosed.

JP2013-223284A

However, in order to diagnose abnormalities in equipment by measuring electrical information such as current and power supplied to mechanical devices over a long period of time, conventional technology requires memory and servers to hold a huge amount of electrical information over a long period of time. etc. are required. Furthermore, it is necessary to extract necessary information from electrical information that has been recorded for a long period of time, compare it with normal values, and determine whether there is an abnormality in the equipment. In this way, diagnosing a mechanical device not only requires resources to use a large amount of electrical information, but also requires work such as processing the recorded information. There is room for improvement in diagnosing the condition.

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 condition of a mechanical device or the like.

In order to solve the above problems and achieve the purpose, a diagnostic device according to the present disclosure includes an electrical information input section that inputs electrical information supplied to a mechanical device, and an electrical information input section that inputs electrical information that is input when the mechanical device operates for one cycle. a diagnostic unit that diagnoses the state of the mechanical device based on the electrical information obtained, the diagnostic unit compares the electrical information measured in a plurality of chronologically different one-cycle operations. , the state of the mechanical device is diagnosed based on the comparison result , the electrical information is electrical information corresponding to at least one of a power amount and a current value of the mechanical device during one cycle operation, and the diagnostic section In the case where the diagnostic unit compares at least one of the electric power amounts and the current values measured in two chronologically successive one-cycle operations, and the diagnostic unit compares the electric power amounts. , when the power amount measured in the chronologically later one-cycle operation is greater than the power amount measured in the chronologically previous one-cycle operation; When the diagnosis unit estimates different causes of the abnormality in the cases where the electric power is lower than the electric power measured in one cycle operation, and compares the values of the electric current, the first When the value of the current measured in a cycle operation is greater than the value of the current measured in the previous one-cycle operation in chronological order, and Different causes of the abnormality are estimated depending on the case where the current has decreased from the above-mentioned value .

According to the present disclosure, there is an effect that the state of a mechanical device or the like can be easily diagnosed.

A diagram showing a diagnostic device according to the present embodiment and a mechanical device to be diagnosed. A diagram showing a diagnostic device according to the present embodiment and a mechanical device to be diagnosed. Diagram showing an example configuration of an overload relay Diagram showing the functional configuration of the diagnostic device Flowchart to explain the operation of the diagnostic device Timing chart to explain the operation of the diagnostic device Timing chart to explain the operation of the diagnostic device Flowchart to explain the operation of the diagnostic device Timing chart to explain the operation of the diagnostic device Timing chart to explain the operation of the diagnostic device Diagram showing the hardware configuration of the diagnostic device

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out the present disclosure will be described using figures. Note that the present invention is not limited to this embodiment. In addition, in the description of the figures below, the same or similar parts are given the same or similar symbols. In addition, the embodiments described below exemplify devices and methods for embodying the technical idea of the present disclosure. It is not specific to The technical idea of the present disclosure can be modified in various ways within the technical scope defined by the claims.

FIGS. 1A and 1B are diagrams showing a diagnostic device according to the present embodiment and a mechanical device to be diagnosed. The diagnostic system 100 includes a server 1, a molded circuit breaker 2 which is a main wiring circuit breaker for a commercial system provided in a switchboard, a first mechanical device 300-1, a second mechanical device 300-2, and a distribution circuit breaker. It includes a plurality of in-board devices provided in the panel 101-1, a plurality of in-board devices provided in the distribution board 101-2, and a diagnostic device 4. Note that the diagnostic system 100 may be configured to include a control device such as a PLC (programmable logic controller) instead of the server 1. Furthermore, the diagnostic system 100 may be configured to include a control panel in place of each of the distribution boards 101-1 and 101-2.

The first mechanical device 300-1 and the second mechanical device 300-2 are, for example, devices installed in a manufacturing line, such as a rolling device, a conveyor, a press, a welding machine, a cleaning machine, a semiconductor manufacturing device, etc. . For example, if the first mechanical device 300-1 is a rolling device and the second mechanical device 300-2 is a press device, a metal workpiece having a predetermined thickness is rolled, and the rolled workpiece is The process involves punching out parts from inside. The first mechanical device 300-1 and the second mechanical device 300-2 are devices that operate for one cycle according to a sequence program, basic routine, etc. One cycle is sometimes referred to as "one shot" or "one step." Hereinafter, when the distribution board 101-1 and the distribution board 101-2 are not distinguished, they may be referred to as "the distribution board 101." Furthermore, when the first mechanical device 300-1 and the second mechanical device 300-2 are not distinguished, they may be referred to as a "mechanical device 300."

The plurality of in-panel devices provided in the distribution board 101 are power distribution devices. The in-panel devices include, for example, a molded case circuit breaker 5 which is the main circuit breaker in the distribution board 101, and two molded case circuit breakers 6a and 6b connected to the secondary side of the molded case circuit breaker 5. , a magnetic contactor 7a connected to the secondary side of the molded circuit breaker 6a, a magnetic contactor 7b connected to the secondary side of the molded circuit breaker 6b, and a magnetic contactor 7b connected to the secondary side of the magnetic contactor 7a. The electromagnetic contactor 7b includes an overload relay 8a and an overload relay 8b connected to the secondary side of the electromagnetic contactor 7b.

A system power supply 200 is connected to the primary side of the molded case breaker 2, and the primary side of the molded case breaker 5 is connected to the secondary side of the molded case breaker 2 via an electric wire 16. The primary sides of molded circuit breakers 6a and 6b are connected to the secondary side of molded circuit breaker 5 via connecting wires 18.

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

An electromagnetic contactor 7b is connected to the secondary side of the molded circuit breaker 6b via a connecting wire 18. An overload relay 8b is connected to the secondary side of the electromagnetic contactor 7b via a connecting wire 18. A load 9 is connected to the secondary side of the overload relay 8b via a connecting wire 18.

The molded circuit breaker 6a, the electromagnetic contactor 7a, and the overload relay 8a each have a function of collecting the amount of electricity and a communication function of transmitting electrical information indicating the content of the collected amount of electricity to the diagnostic device 4. . The quantity of electricity is, for example, current, voltage, power, etc. 1A and 1B are diagrams showing a case where the overload relay 8a has the above function.

The sensor 14 is an electric quantity detection sensor that detects an electric quantity and transmits it to the diagnostic device 4, and can be installed at any location within the distribution board 101. When the sensor 14 includes a current detection means for detecting current, it detects the current flowing through the connecting wire 18 wired between the electromagnetic contactor 7b and the overload relay 8b, and generates information indicating the value of the detected current. is transmitted to the diagnostic device 4 via the communication line 17 as electrical information. In addition, when the sensor 14 includes a power detection means for detecting power, for example, it detects the instantaneous value of the AC voltage applied to the connecting wire 18 and the instantaneous value of the AC current flowing into the load 9, and Power is calculated from the value, and information indicating the calculated power value is transmitted to the diagnostic device 4 via the communication line 17 as electrical information.

The diagnostic device 4 collects electrical information and diagnoses the state of the mechanical device 300 including the load 9 based on the collected electrical information. Details of the diagnostic method will be described later. Note that the diagnosis result by the diagnostic device 4 may be transmitted to the server 1 via the communication line 3, for example. The communication method of the communication line 3 is applicable regardless of whether it is a wireless communication method or a wired communication method. Further, the diagnosis and communication functions of the diagnostic device 4 may be implemented in an in-panel device mounted on the distribution board or the control panel 101.

Next, with reference to FIG. 2, a configuration example of an overload relay 8a, which is an example of an in-panel device, will be described.

FIG. 2 is a diagram showing an example of the configuration of an overload relay. The overload relay 8a is an electronic overload relay including a contact relay such as a mechanical relay or a non-contact relay such as a semiconductor relay. The overload relay 8a is, for example, a means for transmitting electrical information to the relay contact 22a, the arithmetic unit 22b, the power supply unit 22c, the electromagnet unit 22d, and the diagnostic device 4 using either the mechanical relay or the semiconductor relay described above. It includes a transmission circuit 22g and a voltage sensor 22f. These components are mounted on the substrate 50, for example.

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

The current sensor 19 is a current detection element such as a shunt resistor for detecting the current flowing through the connecting wire 18. Note that the current sensor 19 may be any sensor that can detect current, such as a CT (Current Transformer) or a Rogowski coil. Current information, which is information indicating the value of the current detected by the current sensor 19, is input to the calculation unit 22b, and the calculation unit 22b transmits the current information to the diagnostic device 4 by wire or wirelessly.

The calculation unit 22b inputting the current information inputs a trip signal 4a to the power supply unit 22c when detecting a current reaching a predetermined threshold current. The power supply unit 22c has a trip capacitor that stores charge, and discharges the charge stored in the trip capacitor when the trip signal 4a is input. As a result, the electromagnet portion 22d is driven to trip the contact mechanism (relay contact 22a). By tripping the relay contact 22a, the coil of the electromagnetic contactor 7a is de-energized and the connecting wire 18 is opened. When a predetermined period of time has elapsed after the trip operation, the calculation unit 22b inputs a reset signal to the power supply unit 22c, thereby driving the electromagnet unit 22d by discharging the reset capacitor of the power supply unit 22c, and starting the contact mechanism (relay contact 22a). performs a reset operation.

The voltage sensor 22f acquires voltage information from, for example, voltage detection wiring directly connected to each of the U-phase, V-phase, and W-phase connection wires 18, and inputs it to the calculation unit 22b. Although FIG. 2 shows a configuration in which current information is transmitted as electrical information, a configuration in which power is calculated from detected current and voltage and transmitted as electrical information may be adopted.

Next, a configuration example of the diagnostic device 4 will be explained with reference to FIG. FIG. 3 is a diagram showing the functional configuration of the diagnostic device. The diagnostic device 4 includes an electrical information input unit 41 that inputs electrical information measured by power distribution equipment connected to the load 9, and a server that generates an operation command that instructs the operation of the mechanical device 300. 1, and a diagnostic section 40 that 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 command. In addition, as shown in FIG. 1B, the operation command may directly enter the electromagnetic contactor 7a or 7b from the server 1, and a branched operation command signal may enter the diagnostic device 4, or as shown in FIG. 1A. , the electromagnetic contactor 7a or the electromagnetic contactor 7b may be entered via the diagnostic device 4.

The operation command includes a start command and a stop command. The start command is a command that instructs the mechanical device 300 to start one cycle of operation. The stop command is a command that instructs the mechanical device 300 to end one cycle of operation. For example, the timing when a start command is issued to the mechanical device 300 is the start point of "1 cycle", the timing when a stop command is issued to the mechanical device 300 is the end point of "1 cycle", and the series from the start point to the end point is The operation of is considered as "1 cycle". Note that "one cycle" is not limited to the series of operations from the above-mentioned start point to the end point; for example, from the start point when a start command is issued to the mechanical device 300, to the mechanical device 300 again after the start point. It may be a series of operations up to the start point (next start point) when the start command is issued.

The diagnostic device 4 obtains electrical information for each cycle of the mechanical device 300, and compares and analyzes the obtained electrical information with previously obtained electrical information, preset electrical information, etc. It supports improvement of production efficiency, insulation deterioration of the mechanical device 300, and finding of defects in the mechanical device 300.

For example, in the case of a press machine, one cycle operation consists of inputting a start command, the tool advances toward the metal plate, pressing the tool against the workpiece, cutting out the workpiece, and inputting a stop command. This includes an operation in which a tool that cuts out a workpiece returns to a predetermined position. Further, in the case of a pump, one cycle operation is an operation in which water is continuously pumped after a start command is input until a stop command is input. Note that the driving command may be transmitted from an external device of the diagnostic device 4. The diagnosis unit 40 diagnoses the state of the mechanical device 300 based on electrical information input when the mechanical device 300 operates for one cycle.

The diagnostic device 4 also includes a 1-cycle power amount calculation unit 43 that calculates the integrated value of power acquired from the in-panel devices for each cycle, a 1-cycle power amount storage unit 44 that holds the 1-cycle power amount, and a 1-cycle power amount storage unit 44 that stores the 1-cycle power amount. The communication unit 45 is provided with a communication function that transmits information indicating the value of the electric energy to the server 1, for example.

The diagnosis section 40 includes a power amount difference calculation section 46a, an estimation section 46b, a notification section 46d, a current difference calculation section 47a, an estimation section 47b, and a notification section 47d.

The power amount difference calculation unit 46a calculates the difference in the 1-cycle power amount at different time points (power amount difference) based on the 1-cycle power amount defined as normal when the mechanical device 300 operates for 1 cycle. do.

The estimation unit 46b receives the power difference calculated by the power difference calculation unit 46a, and estimates the cause of the abnormality in the mechanical device 300 based on the power difference and the power threshold 46c. The power amount threshold 46c is set, for example, based on electrical information acquired when the mechanical device 300 is normal.

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

The current difference calculation unit 47a calculates a difference in current during one cycle operation (current difference), for example, based on one cycle current information defined as normal when the mechanical device 300 operates one cycle at different time points. The difference between the maximum value, minimum value, and average value of current within one cycle period is calculated.

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

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

Next, the operation of the diagnostic device 4 will be explained with reference to FIGS. 4 to 9. In the following, a diagnostic operation using electric power will be described with reference to FIGS. 4 to 6, and then a diagnostic operation using electric current will be described with reference to FIGS. 7 to 9.

FIG. 4 is a flowchart for explaining the operation of the diagnostic device, FIG. 5 is a timing chart for explaining the operation of the diagnostic device, and FIG. 6 is a timing chart for explaining the operation of the diagnostic device. 4 to 6 are diagrams for explaining operations in the power amount difference calculation section 46a, the estimation section 46b, and the notification section 46d.

As shown in FIGS. 5 and 6, when a driving command for one shot operation is generated (step S1), electrical information (power amount) is input to the diagnostic device 4 (step S2).

The power amount difference calculation unit 46a calculates, for example, the value of the power amount measured during one cycle of operation from when the start command is input at time t1 until the stop command is input at time t2, and the value of the power amount measured during the next cycle. The power consumption value measured during operation is compared with the value of electric energy measured during each of these two one-cycle operations, and a difference between the values of electric energy measured during each of these two one-cycle operations is calculated (step S3). The "next cycle operation" is, for example, an operation from when a start command is input at time t3 until a stop command is input at time t4. Note that the power used by the power amount difference calculation unit 46a may be the power amount during one cycle operation measured at consecutive timings in time series, or may be the power amount measured at arbitrary timings discontinuous in time series. It is also possible to use the same amount of power during one cycle of operation.

The estimation unit 46b determines whether the power amount difference exceeds the power amount threshold 46c (step S4). If the power amount difference is less than or equal to the power amount threshold 46c (step S4, No), the processes from step S1 onwards are repeated. If the power amount difference exceeds the power amount threshold 46c (step S4, Yes), the process of step S5 is executed.

In step S5, the estimating unit 46b determines whether or not the electric energy is on an increasing trend by comparing the values of electric energy during two one-cycle operations measured at different timings in chronological order. (Step S5).

As shown in FIG. 5, for example, when the amount of power during one cycle of operation from time t3 to time t4 tends to increase more than the amount of power during one cycle of operation from time t1 to time t2 (step S5, Yes), the estimation unit 46b estimates that the first abnormality cause has occurred (step S6). The first cause of the abnormality may be, for example, that the tool of the press machine is worn out, and the driving power of the tool is temporarily increased during machining of the workpiece (workpiece).

As shown in FIG. 6, for example, when the amount of power during one cycle of operation from time t3 to time t4 tends to decrease than the amount of power during one cycle of operation from time t1 to time t2 (step S5, No), the estimation unit 46b estimates that the second abnormality cause has occurred (step S7). The second cause of the abnormality may be, for example, that the gear of the tool of the press machine is cracked or damaged, resulting in a temporary decrease in the amount of driving power for the tool during machining of the workpiece.

The notification unit 46d notifies the server 1 and the like of the cause of the abnormality estimated by the estimation unit 46b (step S8). The server 1, which has received the notification information from the notification unit 46d, may display message information corresponding to the notification content on a display means, or may display, for example, audio or message information corresponding to the notification content through a sound reproduction means such as a speaker. An alarm sound may also be generated.

FIG. 7 is a flowchart for explaining the operation of the diagnostic device, FIG. 8 is a timing chart for explaining the operation of the diagnostic device, and FIG. 9 is a timing chart for explaining the operation of the diagnostic device. 7 to 9 are diagrams for explaining operations in the current difference calculation section 47a, the estimation section 47b, and the notification section 47d.

As shown in FIGS. 8 and 9, when a driving command for one cycle operation is generated (step S11), electrical information (current) is input to the diagnostic device 4 (step S12).

The current difference calculation unit 47a calculates, for example, the value of the current measured during one cycle of operation from when a start command is input at time t1 until the stop command is input at time t2, and the value during the next cycle of operation. The difference between the current values measured during each of these two one-cycle operations is calculated (step S13). Note that the current used by the current difference calculation unit 47a may be currents measured at consecutive timings in chronological order during one cycle operation, or may be currents measured at arbitrary timings discontinuous in chronological order. The currents may be the same during one cycle operation.

The estimation unit 47b determines whether the current difference exceeds the current threshold 47c (step S14). If the current difference is less than or equal to the current threshold 47c (step S14, No), the processes from step S11 onward are repeated. If the current difference exceeds the current threshold 47c (step S14, Yes), the process of step S15 is executed.

In step S15, the estimating unit 47b determines whether the current is on an increasing trend by comparing the values of the current during two one-cycle operations measured at different timings in chronological order ( Step 15).

As shown in FIG. 8, for example, when the current during one cycle operation from time t3 to time t4 tends to increase more than the current during one cycle operation from time t1 to time t2, for example (step S15, Yes). , the estimation unit 47b estimates that the first abnormality cause described above has occurred (step S16).

As shown in FIG. 9, for example, when the current during one cycle operation from time t3 to time t4 tends to decrease than the current during one cycle operation from time t1 to time t2, for example (step S15, No). , the estimating unit 47b estimates that the second abnormality cause described above has occurred (step S17).

The notification unit 47d notifies the server 1 and the like of the cause of the abnormality estimated by the estimation unit 47b (step S18). The server 1 that has received the notification information from the notification unit 47d may display, for example, message information corresponding to the notification content on a display means, or may display, for example, audio or message information corresponding to the notification content through a sound reproduction means such as a speaker. An alarm sound may also be generated.

FIG. 10 is a diagram showing the hardware configuration of the diagnostic device. The functions of the diagnostic device 4 may be realized by arbitrary 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, each connected by a bus 29. Ru.

Programs that implement various functions of the diagnostic device 4 are provided, for example, by the recording medium 28. The recording medium 28 is, for example, a portable memory 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 recording medium 28 on which the program is recorded is set in the drive device 21, the program is installed from the recording medium 28 to the auxiliary storage device 22 via the drive device 21. Further, the program may be downloaded from another computer via a communication network and installed in the auxiliary storage device 22.

The auxiliary storage device 22 stores various installed programs as well as necessary files, data, and the like. The memory device 23 reads the program from the auxiliary storage device 22 and stores it therein when there is an instruction to start the program. The CPU 24 executes various programs stored in the auxiliary storage device 22, and implements various functions related to the diagnostic device 4 according to the programs. When implementing the diagnostic device 4, a program for the diagnostic device 4 is stored in the auxiliary storage device 22, and the CPU 24 executes this program, thereby realizing the diagnostic section 40 of the diagnostic device 4.

The interface device 25 is used as an interface for connecting the diagnostic device 4 to the communication line 3. The display device 26 displays a GUI (Graphical User Interface) according to a program executed by the CPU 24, for example. The input device 27 is used to allow an operator, administrator, or the like of the diagnostic device 4 to input various operating instructions regarding the diagnostic device 4 .

As described above, the diagnostic device 4 according to the present embodiment includes an electrical information input unit that inputs electrical information supplied to a mechanical device, and an electrical information input unit that inputs electrical information supplied when the mechanical device operates for one cycle. A diagnosis section that diagnoses the state of the mechanical device based on the information.

Conventional technology measures electrical information such as current and power supplied to mechanical equipment over a long period of time to diagnose equipment abnormalities. It becomes necessary. Furthermore, it is necessary to extract necessary information from electrical information that has been recorded for a long period of time, compare it with normal values, and determine whether there is an abnormality in the equipment. In this way, diagnosing a mechanical device not only requires resources to use a large amount of electrical information, but also requires work such as processing the recorded information. There was room for improvement in diagnosing the condition.

In contrast, according to the diagnostic device 4 according to the present embodiment, the above configuration allows the diagnostic section 40 to diagnose the mechanical device using electrical information measured during one cycle of operation. Therefore, unlike the prior art, it is not necessary to use a large amount of electrical information for diagnosis, so the capacity of the recording medium for recording electrical information is reduced, and resources can be used effectively. Further, it becomes unnecessary to process a large amount of information recorded on a recording medium, and it is possible to quickly diagnose the state of a mechanical device.

Furthermore, since the diagnostic device 4 according to the present embodiment can grasp the amount of power for each cycle of operation, energy saving management (EMS) for each process is possible. Further, since it is possible to detect a trend that deviates from the current trend measured during normal times, it is possible to take preventive measures against abnormalities in the mechanical device 300. Further, even if a defective product is included in the workpiece processed by the mechanical device 300, the point at which the product defect occurs can be identified by using electrical information for each cycle measured in chronological order. Additionally, trends in power consumption and current can be managed on a cycle-by-cycle basis, and equipment quirks can be stored as maintenance knowledge. Furthermore, by diagnosing the change in current trend in units of cycles, deterioration of equipment (tool wear, etc.) can be detected and quality defects can be prevented. Additionally, if the current deviates from the trend, it can be reported that the current is different from normal, so quality defects can be prevented from occurring (preventive maintenance). In addition, signs and trends of abnormalities, breakdowns, etc. can be detected in advance and utilized for inspection and maintenance (recovery support). In addition, it is possible to grasp the power consumption per cycle and make detailed energy savings and improve production efficiency.

Further, the diagnostic method according to the present embodiment includes a step in which the diagnostic device inputs electrical information supplied to the mechanical device, and a state of the mechanical device based on the electrical information input when the mechanical device operates for one cycle. diagnosing. Furthermore, the machine diagnosis program according to the present embodiment includes a step of inputting electrical information supplied to the mechanical device into a computer, and a step of inputting electrical information supplied to the mechanical device into the computer, and determining the state of the mechanical device based on the electrical information input when the mechanical device operates for one cycle. and the step of diagnosing the problem.

The configurations shown in the embodiments described above are examples of the contents of the present disclosure, and can be combined with other known technologies, and the configurations can be modified without departing from the gist of the present disclosure. It is also possible to omit or change parts.

1: Server 2: Molded circuit breaker 4: Diagnosis device 9: Load 40: Diagnosis section 41: Electrical information input section 42: Operation command generation section 43: 1 cycle electric energy calculation section 44: 1 cycle electric energy storage section 45: Communication unit 46a: Electric energy difference calculation unit 46b: Estimation unit 46c: Electric energy threshold 46d: Notification unit 47a: Current difference calculation unit 47b: Estimation unit 47c: Current threshold 47d: Notification unit 300-1: First mechanical device 300- 2: Second mechanical device

Claims (8)

an electrical information input section for inputting electrical information supplied to the mechanical device;
a diagnosis unit that diagnoses the state of the mechanical device based on the electrical information input when the mechanical device operates one cycle;
Equipped with
The diagnostic department includes:
Comparing the electrical information measured in a plurality of chronologically different one-cycle operations, and diagnosing the state of the mechanical device based on the comparison results ,
The electrical information is electrical information corresponding to at least one of the electric energy and current value of the mechanical device during the one cycle operation,
The diagnostic unit compares at least one of the electric power amounts and the current values measured in two chronologically successive one-cycle operations,
When the diagnostic unit compares the electric power amounts, the electric power amount measured in the chronologically later one-cycle operation is the electric power amount measured in the chronologically earlier one-cycle operation. Estimating different causes of the abnormality in cases where the amount of electric power has increased more than the amount of electric power measured in the previous one cycle operation in time series, and when the amount of electric power has decreased than the amount of electric power measured in the previous one cycle operation in chronological order,
When the diagnostic unit compares the current values, the current value measured in the chronologically later one-cycle operation is the same as the current value measured in the chronologically previous one-cycle operation. A diagnostic device that estimates different causes of an abnormality when the current value increases and when the current value decreases from the current value measured in the previous one cycle operation in time series. The diagnostic device according to claim 1, wherein the electrical information input unit inputs electrical information measured by a power distribution device connected to the mechanical device. 3. The diagnostic device according to claim 1 , further comprising a notification section that, when the diagnosis section diagnoses that the state of the mechanical device is abnormal, provides notification information indicating that an abnormality has occurred in the mechanical device. The diagnostic device according to any one of claims 1 to 3 , wherein the mechanical device is a rolling processing device, a conveying machine, a press machine, a welding machine, a cleaning machine, or a semiconductor manufacturing device. A distribution board comprising the diagnostic device according to any one of claims 1 to 4 . A control panel comprising the diagnostic device according to any one of claims 1 to 4 . The diagnostic equipment
inputting electrical information to be supplied to the mechanical device;
diagnosing the state of the mechanical device based on the electrical information input when the mechanical device operates one cycle;
including;
In the diagnosing step, the diagnosing device compares the electrical information measured in a plurality of chronologically different one-cycle operations, and diagnoses the state of the mechanical device based on the comparison result ,
The electrical information is electrical information corresponding to at least one of the electric energy and current value of the mechanical device during the one cycle operation,
In the diagnosing step, the diagnosing device compares at least one of the electric power amounts and the current values measured in two chronologically successive one-cycle operations,
In the step of diagnosing, when the diagnosing device compares the amounts of power, the amount of power measured in the one-cycle operation that is later in time series is the amount of power measured in the one-cycle operation that is earlier in time series. Estimating different causes of the abnormality in a case where the power amount is increased from the measured power amount and a case where the power amount is decreased from the power amount measured in the previous one cycle operation in time series,
In the diagnosing step, when the diagnosing device compares the current values, the current value measured in the chronologically later one cycle operation is chronologically the same as the chronologically previous one cycle operation. estimating different causes of the abnormality in a case where the current value is increased from the value measured in the operation and a case where it is decreased from the value of the current measured in the previous one cycle operation in time series; Diagnostic method. to the computer,
inputting electrical information to be supplied to the mechanical device;
diagnosing the state of the mechanical device based on the electrical information input when the mechanical device operates one cycle;
run the
In the diagnosing step, the computer compares the electrical information measured in a plurality of chronologically different one-cycle operations, and diagnoses the state of the mechanical device based on the comparison result ,
The electrical information is electrical information corresponding to at least one of the electric energy and current value of the mechanical device during the one cycle operation,
In the diagnosing step, the computer compares at least one of the electric power amounts and the current values measured in two chronologically successive one-cycle operations,
In the step of diagnosing, when the computer compares the power amounts, the power amount measured in the chronologically later one-cycle operation is chronologically measured in the chronologically earlier one-cycle operation. estimating different causes of the abnormality in a case where the electric power amount is increased than the electric power amount measured in the previous one cycle operation and a case where the electric power amount is decreased than the electric power amount measured in the previous one cycle operation in chronological order;
In the step of diagnosing, when the computer compares the current values, the current value measured in the chronologically later one-cycle operation is the same as the current value measured in the chronologically previous one-cycle operation. A machine that estimates different causes of the abnormality when the current value is increased from the value measured in the current and when it is decreased from the current value measured in the previous one cycle operation in time series. Diagnostic program.

Images