Management device and management system for materials testing machine

Abstract

To allow a user to easily grasp the state of a material tester.SOLUTION: A management device provided herein comprises an acquisition unit 412 for acquiring parameters of a material tester, and a determination unit 413 configured to determine which of a plurality of states the material tester is in. The determination unit 413 transitions the state of the material tester according to the pre-transition state of the material tester and values of the parameter on a state transition diagram defining state transitions of the material tester to determine the state of the material tester after the transition.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a management device and a management system for a materials testing machine. [Background technology]

[0002] Conventionally, the operating state of a material testing machine is managed by the user of the material testing machine. For example, in a fatigue testing machine described in Patent Document 1, a control device that controls the test is equipped with a display device, and the control device displays test conditions and the like on the display device. The user visually checks the display device to understand and manage the operating state of the fatigue testing machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-292400 A Summary of the Invention [Problem to be solved by the invention]

[0004] A user who manages a material testing machine visually checks the display of the material testing machine to check the operating status of the machine. This requires the user to go to the location where the material testing machine is installed, and it was desirable to reduce the burden on the user.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to enable a user to easily grasp the state of a materials testing machine. [Means for solving the problem]

[0006] The management device of the first aspect of the present invention comprises an acquisition unit that acquires parameters of a materials testing machine, and a judgment unit that judges which of a plurality of states the materials testing machine is in, and the judgment unit judges the state of the materials testing machine after a transition by transitioning the state of the materials testing machine based on the state before the transition and the value of the parameters in a state transition diagram that defines the transition of the states of the materials testing machine.

[0007] A management system according to a second aspect of the present invention is a management system for a materials testing machine comprising a materials testing machine and a management device that manages the state of the materials testing machine, the management device comprising an acquisition unit that acquires parameters of the materials testing machine and a judgment unit that judges which of a plurality of states the materials testing machine is in, and the judgment unit judges the state of the materials testing machine after the transition by transitioning the state of the materials testing machine based on the state before the transition and the value of the parameter in a state transition diagram that defines the transition of the state of the materials testing machine. Effect of the Invention

[0008] The management device according to the first aspect of the present invention and the management system for a materials testing machine according to the second aspect of the present invention can appropriately determine the state of the materials testing machine by transitioning the state of the materials testing machine based on parameters. This can save the user the trouble of directly visually checking the state of the materials testing machine, thereby reducing the burden on the user in managing the materials testing machine. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating an example of a configuration of a management system according to a first embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of the configuration of a fatigue testing machine. [Diagram 3] FIG. 2 is a diagram illustrating an example of the configuration of a first control device and a second control device. [Figure 4] FIG. 2 is a state transition diagram showing an example of a configuration of a finite state automaton. [Diagram 5]1 is a table showing an example of correspondence between input values ​​and operation states of a finite state automaton; [Figure 6] FIG. 13 is a diagram showing an example of a status display screen that displays the status of a fatigue testing machine. [Figure 7] 6 is a flowchart showing an example of an operation of the second control device. [Figure 8] FIG. 11 is a diagram illustrating an example of a configuration of a management system according to a second embodiment. [Figure 9] FIG. 2 illustrates an example of a configuration of a management device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the present embodiment will be described with reference to the drawings.

[0011] [1. First embodiment] [1-1. Management system configuration] FIG. 1 is a diagram showing an example of the configuration of a management system 100 according to the first embodiment. The management system 100 includes a fatigue testing machine 1 and a fatigue testing machine 3. The management system 100 includes multiple fatigue testing machines 1A, 1B, and 1C. The fatigue testing machines 1A, 1B, and 1C have approximately the same configuration. Therefore, in this embodiment, when there is no need to distinguish between the fatigue testing machines 1A, 1B, and 1C, they will be referred to as fatigue testing machine 1. FIG. 1 illustrates an example of a configuration in which the management system 100 includes three fatigue testing machines 1, but there is no limit to the number of fatigue testing machines 1. The management system 100 corresponds to an example of a management system for a material testing machine. The fatigue testing machine 1 corresponds to an example of a material testing machine.

[0012] The fatigue testing machine 1 includes a testing machine main body 10 and a first control device 20. The fatigue testing machine 1 performs a fatigue test on the test piece SP by controlling the testing machine main body 10 by the first control device 20. For example, the fatigue testing machine 1 repeatedly applies a tensile stress σ to the test piece SP. The tensile stress σ and the number of repetitions are preset. The number of repetitions is, for example, 10 2 times ~10 8 times.

[0013] The fatigue testing machine 3 includes a testing machine main body 10 and a second control device 40. The testing machine main body 10 included in the fatigue testing machine 3 has the same configuration as the testing machine main body 10 included in the fatigue testing machine 1. The fatigue testing machine 3 performs a fatigue test on a test piece SP in the same manner as the fatigue testing machine 1, by controlling the testing machine main body 10 with the second control device 40.

[0014] The fatigue testing machine 3 is communicably connected to each of the fatigue testing machines 1A, 1B, and 1C via the network NW. The fatigue testing machine 3 manages the operating states of each of the fatigue testing machines 1A, 1B, and 1C. The configurations of the fatigue testing machine 1 and the fatigue testing machine 3 will be described later with reference to FIG.

[0015] In this embodiment, the network NW is a LAN (Local Area Network). The network NW is configured, for example, by cables conforming to the Ethernet (registered trademark) standard. The network NW may be configured by a wireless communication line such as Wi-Fi (registered trademark). In this embodiment, the case where the network NW is a LAN will be described, but the network NW may be a WAN (Wide Area Network) or the Internet.

[0016] [1-2. Configuration of fatigue testing machine] FIG. 2 is a diagram showing an example of the configuration of the fatigue testing machine 1. As shown in FIG. The testing machine main body 10 performs a fatigue test on the test piece SP in accordance with instructions from the first control device 20. The first control device 20 controls the operation of the testing machine main body 10.

[0017] As shown in FIG. 2, the testing machine body 10 is configured by forming a load frame on a base 11 with a pair of support columns 12a, 12b and a yoke 13, and by fixing a crosshead 14 to the support columns 12a, 12b.

[0018] A hydraulic actuator 15 is disposed on the base 11, and a lower jig 16a for fixing the lower end of the test specimen SP is attached to a piston rod 15a of the hydraulic actuator 15. In addition, an upper jig 16b for fixing the upper end of the test specimen SP is attached to the crosshead 14 via a load cell 17. The lower jig 16a and the upper jig 16b each include a chuck mechanism for gripping the test specimen SP. The load cell 17 detects the test force acting on the test piece SP.

[0019] In the hydraulic actuator 15, the direction and amount of pressure oil are controlled by the servo valve 18, and the piston rod 15a extends and retracts. As a result, a test force is applied to the test piece SP fixed between the upper jig 16b and the lower jig 16a. The stroke of the hydraulic actuator 15, i.e., the displacement of the test piece SP, is detected by a differential transformer 19 attached to the hydraulic actuator 15.

[0020] The testing machine body 10 is provided with an electric power source and a hydraulic power source (not shown). The electric power source supplies electric power to each part of the testing machine body 10. The electric power source supplies electric power to, for example, various motors to drive them. The hydraulic power source supplies hydraulic pressure to a hydraulic device constituting the testing machine body 10. The hydraulic power source supplies hydraulic pressure to, for example, a hydraulic actuator 15 to drive the hydraulic actuator 15. That is, the hydraulic actuator 15 is driven by hydraulic pressure supplied from the hydraulic power source, and the piston rod 15a is extended and contracted. The hydraulic power source includes, for example, a hydraulic pump and a hydraulic control valve, and generates hydraulic pressure by driving the hydraulic pump. The hydraulic control valve adjusts the hydraulic pressure output from the hydraulic power source. Electric power is supplied from the electric power source to the hydraulic pump and the hydraulic control valve.

[0021] The first control device 20 acquires a test force signal FS output from the load cell 17, and performs A / D conversion on the test force signal FS to generate test force information. The first control device 20 acquires a displacement signal DS output from the differential transformer 19, and performs A / D conversion on the displacement signal DS to generate displacement information. The first control device 20 generates command information based on the test force information and the displacement information. The first control device 20 generates a command signal CS by D / A converting the command information, and outputs the generated command signal CS to the servo valve 18.

[0022] The servo valve 18 controls the direction and amount of pressure oil for the hydraulic actuator 15 in accordance with a command signal CS output from the first control device 20.

[0023] In the configuration of FIG. 2, amplifiers for amplifying the test force signal FS, the displacement signal DS, and the command signal CS may be disposed between the testing machine main body 10 and the first control device 20. 2 is also the same in the fatigue testing machine 3. As described above, the fatigue testing machine 3 is configured by connecting the second control device 40 to the testing machine body 10 instead of the first control device 20. Similar to the first control device 20, the second control device 40 executes a fatigue test on the test piece SP by outputting a command signal CS to the testing machine body 10 based on the test force signal FS and the displacement signal DS output by the testing machine body 10.

[0024] [1-3. Control device configuration] The first control device 20 controls the operation of the testing machine main body 10 based on an operation from a user, and causes the testing machine main body 10 to test the test piece SP. The second control device 40, like the first control device 20, controls the operation of the testing machine main body 10 to test the test piece SP. The user includes an operator who operates the fatigue testing machines 1, 3.

[0025] FIG. 3 is a diagram showing an example of the configuration of the first control device 20 and the second control device 40. As shown in FIG. The first control device 20 includes a computer having a storage device such as a hard disk drive (HDD) or a solid state drive (SSD) and various electronic circuits. The first control device 20 is not limited to a computer, and may be configured with one or more appropriate circuits such as an integrated circuit such as an IC chip or an LSI.

[0026] The first control device 20 is configured by, for example, a personal computer, and includes a first processor 21, a first memory 22, an input unit 23, a display unit 24, a communication interface 25, and a test machine interface .

[0027] The first processor 21 is configured with a CPU (Central Processing Unit), an MPU (Micro-Processing Unit), and the like. The first memory 22 is composed of a ROM (Read Only Memory), a RAM (Random Access Memory), or the like.

[0028] The first control device 20 is not limited to a personal computer, and may be configured by one or more appropriate circuits such as integrated circuits such as IC chips and LSIs. The first control device 20 may also be configured by, for example, a tablet terminal or a smartphone. The first control device 20 may also include programmed hardware such as a digital signal processor (DSP) or a field programmable gate array (FPGA). The first control device 20 may also include a system-on-a-chip (SoC)-FPGA.

[0029] 3, the first control device 20 includes a test control unit 211 and a communication control unit 212. Specifically, the first processor 21 of the first control device 20 executes a control program 221 stored in the first memory 22 to function as the test control unit 211 and the communication control unit 212.

[0030] The input unit 23 includes various switches and keys used by a user. The display unit 24 is a display including an LCD (Liquid Crystal Display) panel or the like. The display unit 24 displays test conditions, test force information, displacement information, and the like of the test performed by the fatigue testing machine 1 under the control of the test control unit 211. The input unit 23 may be a touch sensor superimposed on the display surface of the display unit 24.

[0031] The communication interface 25 is connected to the network NW and communicates with the second control device 40 via the network NW. The communication interface 25 includes, for example, a connector to which a communication cable can be connected, and a communication circuit. The communication interface 25 may include a wireless communication interface and may be configured to perform wireless communication.

[0032] The testing machine interface 26 is connected to the testing machine main body 10. The testing machine interface 26 includes, for example, a connector to which a cable connected to the testing machine main body 10 can be connected, and a communication circuit. The testing machine interface 26 includes, for example, an A / D converter that performs A / D conversion of an analog signal, and a D / A converter that converts digital data into an analog signal. The testing machine interface 26 receives the test force signal FS and the displacement signal DS output by the testing machine main body 10, generates test force information and displacement information, and outputs them to the test control unit 211. The testing machine interface 26 also converts command information generated by the test control unit 211 into a command signal CS, and transmits it to the testing machine main body 10.

[0033] The test control section 211 performs settings related to the test of the test piece SP based on information input using the input section 23 or information input from an external device (not shown). The test control section 211 controls the testing machine main body 10 connected to the testing machine interface 26 based on the set conditions, etc. Specifically, the test control section 211 acquires test force information and displacement information via the testing machine interface 26, and generates command information based on the acquired test force information and displacement information. The test control section 211 causes the testing machine main body 10 to operate in accordance with the set conditions, etc. by outputting the command information to the testing machine main body 10 via the testing machine interface 26.

[0034] The communication control unit 212 controls the communication interface 25 to execute communication with the second control device 40. When the second control device 40 requests the parameters, the communication control unit 212 transmits the parameters related to the operating state of the fatigue testing machine 1 via the communication interface 25.

[0035] The second control device 40 includes a computer having a storage device such as an HDD or SSD, and various electronic circuits, similar to the first control device 20. Note that the second control device 40 is not limited to a computer, and may be configured with one or more appropriate circuits such as integrated circuits such as IC chips and LSIs.

[0036] The second control device 40 is configured by, for example, a personal computer. The second control device 40 includes a second processor 41, a second memory 42, an input unit 43, a display unit 44, a communication interface 45, and a test machine interface 46.

[0037] The second processor 41 is composed of a CPU, an MPU, etc. The second memory 42 is composed of a ROM, a RAM, etc.

[0038] The second control device 40 is not limited to a personal computer, and may be configured with one or more appropriate circuits such as an integrated circuit such as an IC chip or an LSI. The second control device 40 may be configured with, for example, a tablet terminal or a smartphone. The second control device 40 may include programmed hardware such as a DSP. The second control device 40 may include an SoC-FPGA.

[0039] The second control device 40 includes a test control unit 411, an acquisition unit 412, a judgment unit 413, and a display control unit 415. The judgment unit 413 has an input value generation unit 414. Specifically, the second processor 41 of the second control device 40 executes a control program 421 stored in the second memory 42 to function as the test control unit 411, the acquisition unit 412, the judgment unit 413, the input value generation unit 414, and the display control unit 415.

[0040] The second memory 42 stores a control program 421 and setting data 422. The second memory 42 also has an automaton storage unit 423 that stores a finite automaton. In detail, the second processor 41 executes the control program 421 to cause the second memory 42 to function as the automaton storage unit 423.

[0041] The input unit 43 includes various switches and keys used by a user. The display unit 44 is a display including an LCD display panel or the like. The display unit 44 displays test conditions, test force information, displacement information, and the like of the test performed by the fatigue testing machine 3 under the control of the test control unit 411. The input unit 43 may be a touch sensor superimposed on the display surface of the display unit 44.

[0042] The communication interface 45 is connected to the network NW and communicates with the first control device 20 via the network NW. The communication interface 45 includes, for example, a connector to which a communication cable can be connected, and a communication circuit. The communication interface 45 may include a wireless communication interface and may be configured to perform wireless communication with the network NW.

[0043] The testing machine interface 46 is connected to the testing machine main body 10. The testing machine interface 46 includes, for example, a connector to which a cable connected to the testing machine main body 10 can be connected, and a communication circuit. The testing machine interface 46 includes, for example, an A / D converter that performs A / D conversion of an analog signal, and a D / A converter that converts digital data into an analog signal. The testing machine interface 46 receives the test force signal FS and the displacement signal DS output by the testing machine main body 10, generates test force information and displacement information, and outputs them to the test control unit 411. The testing machine interface 46 also converts command information generated by the test control unit 411 into a command signal CS, and transmits it to the testing machine main body 10.

[0044] The test control unit 411 performs settings related to the test of the test piece SP based on information input using the input unit 43 or information input from an external device (not shown). The test control unit 411 controls the testing machine main body 10 connected to the testing machine interface 46 based on the set conditions, etc. Specifically, the test control unit 411 acquires test force information and displacement information via the testing machine interface 46, and generates command information based on the acquired test force information and displacement information. The test control unit 411 causes the testing machine main body 10 to operate in accordance with the set conditions, etc. by outputting the command information to the testing machine main body 10 via the testing machine interface 46.

[0045] The acquiring unit 412 executes communication with the first control device 20 via the communication interface 45, and acquires parameters related to the operation of the fatigue testing machine 1 from the first control device 20. The second control device 40 is connected to the fatigue testing machines 1A, 1B, and 1C in the configuration example shown in Fig. 1. In this case, the acquiring unit 412 acquires parameters related to the operation of the fatigue testing machine 1A, parameters related to the operation of the fatigue testing machine 1B, and parameters related to the operation of the fatigue testing machine 1C, respectively.

[0046] The determination unit 413 determines the operating state of the fatigue testing machine 1 based on the parameters acquired by the acquisition unit 412. In the process of determining the operating state of the fatigue testing machine 1, the determination unit 413 utilizes a state transition diagram that specifies the transition of the state of the fatigue testing machine 1. As one embodiment of this state transition diagram, the determination unit 413 uses a state transition model. The state transition model is a virtual machine that imitates the operating state of the fatigue testing machine 1, and is operated by the second processor 41 executing the control program 421. The state transition model has a plurality of states, and a transition condition is set in advance for each state of the state transition model. When an input value that satisfies the transition condition is given, the state transition model transitions to a state corresponding to the transition condition. In this embodiment, a finite automaton stored in the automaton storage unit 423 is used as an example of the state transition model.

[0047] Fig. 4 is a state transition diagram showing an example of the configuration of a finite automaton. The finite automaton in Fig. 4 can take six states: an offline state S1, a power source off state S2, a preparation state S3, a test state S4, a test completion state S5, and an alarm state S6.

[0048] The offline state S1 corresponds to a state in which the fatigue testing machine 1 is offline. Specifically, the fatigue testing machine 1 is powered off or is not connected to the network NW. The power source off state S2 corresponds to a state in which the power source of the fatigue testing machine 1 is not operating. For example, it is a state in which the hydraulic actuator 15 is not provided with the necessary hydraulic pressure from the hydraulic source connected to the testing machine main body 10. The preparation state S3 corresponds to a state in which the fatigue testing machine 1 is preparing for testing. In detail, it is a state in which the test of the test piece SP can be performed, but the test of the test piece SP has not started. The test in progress state S4 corresponds to a state in which the fatigue testing machine 1 is performing the fatigue test of the test piece SP. The test completion state S5 corresponds to a state in which the fatigue testing machine 1 has completed the fatigue test of the test piece SP. The alarm state S6 corresponds to a state in which an alarm has occurred in the operating state of the fatigue testing machine 1.

[0049] As described above, the offline state S1, the power source off state S2, the preparation state S3, the test in progress state S4, the test completion state S5, and the alarm state S6 each have a transition condition. The transition destination when an input value that satisfies the transition condition is input differs for each transition condition.

[0050] For example, the finite state automaton in Fig. 4 transitions to a testing state S4 when an input value indicating the start of a test is input in the preparing state S3. Also, transitions to an alarm state S6 when an input value indicating an alarm is input in the preparing state S3. The transition condition for transitioning from the preparing state S3 to the testing state S4 is different from the transition condition for transitioning from the preparing state S3 to the alarm state S6. Also, if the input value does not satisfy the transition condition, the finite state automaton does not transition and maintains the state before the input value was input.

[0051] The judgment unit 413 includes an input value generation unit 414. The input value generation unit 414 generates an input value of the finite state automaton based on the parameters acquired by the acquisition unit 412 from the fatigue testing machine 1. The input value generated by the input value generation unit 414 may be the same as the parameters acquired by the acquisition unit 412, or may be a different value.

[0052] The parameters that the second control device 40 acquires from the fatigue testing machine 1 may differ depending on the specifications and model of the fatigue testing machine 1. Also, the number of types of parameters may be greater than the number of types of transition conditions of the finite automaton. In such cases, if the transition conditions of the finite automaton are determined in accordance with the types of parameters, the transition conditions will become complicated.

[0053] The determination unit 413 generates fewer types of input values ​​from various types of parameters using the input value generation unit 414. This makes it possible to support fatigue testing machines 1 with various specifications and to reduce the types of input values ​​of the finite state automaton.

[0054] In this embodiment, the input value generating unit 414 generates five input values: interlock, power source, power source, under test, and under alarm. The input values ​​of these five items are, for example, "0" and "1". The interlock is an input value indicating the lock state of the lock mechanism of the fatigue testing machine 1. The value of the interlock is "1" when it is locked, and "0" when it is not locked. The input value generating unit 414 generates the input value of the interlock based on, for example, a parameter indicating the open / close state of the shatterproof cover of the fatigue testing machine 1, a parameter indicating the state of the chuck mechanism of the lower jig 16a and the upper jig 16b, and a parameter indicating heat generation of the hydraulic actuator 15. The operation of the input value generating unit 414 can also be said to be a process of converting the parameters acquired by the acquiring unit 412 into input values ​​defined in the finite automaton.

[0055] The input value generating unit 414 may generate one input value from a plurality of parameters. For example, the input value generating unit 414 may generate an interlock input value based on all of a parameter indicating the open / closed state of the shatterproof cover, a parameter indicating the state of the chuck mechanism, and a parameter indicating heat generation of the hydraulic actuator 15.

[0056] The power input value indicates the power state of the fatigue testing machine 1. The value is "1" when the power of the fatigue testing machine 1 is on, and "0" when the power is off. The input value of the power source indicates the operating state of the power source connected to the testing machine main body 10. The value is "1" if the power source is operating, and "0" if it is not operating. The power source is, for example, a hydraulic power source. The input value of "under test" indicates whether or not the fatigue testing machine 1 is currently testing the test piece SP. The value is "1" if the fatigue testing machine 1 is currently testing, and "0" if the fatigue testing machine 1 is not currently testing. The input value in the alarm indicates whether or not an alarm is being output in the fatigue testing machine 1. The value is "1" if an alarm is being output, and "0" if an alarm is not being output.

[0057] The input value generating unit 414 generates an input value during an alarm based on, for example, a parameter indicating that the drive unit of the fatigue testing machine 1 has reached a limit, a parameter indicating that an abnormality in the power source has been detected, a parameter indicating that the fatigue testing machine 1 has been emergency stopped, and a parameter indicating that an alarm has been input from an external device connected to the fatigue testing machine 1. An example of a case in which the drive unit of the fatigue testing machine 1 has reached a limit is a case in which the movement amount of the piston rod 15a or the test time of the test piece SP has reached the upper limit of the rated range of the fatigue testing machine 1.

[0058] The correspondence between the types of parameters and the types of input values, and the correspondence between the values ​​of parameters and the input values, are defined, for example, by the setting data 422 stored in the second memory 42. Note that the input values ​​described in this embodiment are merely an example, and the types of input values ​​are not limited to five. Also, the values ​​of the input values ​​are not limited to "0" and "1", and may be three or more values.

[0059] The determination unit 413 inputs the input value generated by the input value generation unit 414 to the finite automaton to transition the state of the finite automaton, and determines the operating state of the fatigue testing machine 1 based on the state of the finite automaton after the transition. This makes it possible to appropriately determine the operating state of the fatigue testing machine 1.

[0060] The state of the finite automaton does not have to completely match the operating state of the fatigue testing machine 1. The finite automaton illustrated in FIG. 4 can take six states, but the fatigue testing machine 1 associated with this finite automaton may have operating states exceeding six. That is, a plurality of operating states of the fatigue testing machine 1 may be expressed as one state of the finite automaton. In other words, the state transition diagram defining the operating states of the fatigue testing machine 1 may show transitions between states with a number different from the operating states of the fatigue testing machine 1.

[0061] When the second control device 40 can communicate with a plurality of fatigue testing machines 1 via the network NW, the acquisition unit 412 acquires parameters from each of the fatigue testing machines 1. The input value generation unit 414 generates an input value from the parameters for each of the fatigue testing machines 1. The input value generation unit 414 uses a finite automaton corresponding to each of the fatigue testing machines 1, and inputs an input value to each of the finite automatons to individually determine the operating state of each of the fatigue testing machines 1. For example, the input value generation unit 414 generates an input value corresponding to the fatigue testing machine 1A based on the parameters acquired from the fatigue testing machine 1A. The same applies to the fatigue testing machines 1B and 1C. The judgment unit 413 judges the operating state of the fatigue testing machine 1A by inputting an input value corresponding to the fatigue testing machine 1A to the finite automaton corresponding to the fatigue testing machine 1A to cause a state transition.

[0062] Furthermore, when the test control unit 411 controls the testing machine main body 10 connected to the testing machine interface 46, the acquisition unit 412 acquires parameters related to the operation of the fatigue testing machine 3 from the test control unit 411. The judgment unit 413 judges the operating state of the fatigue testing machine 3 by inputting input values ​​to the finite automaton based on the parameters related to the operation of the fatigue testing machine 3. Therefore, the fatigue testing machine 3 can similarly execute the function of judging the operating state of the fatigue testing machine 1 connected via the network NW and the function of judging the operating state of the fatigue testing machine 3 itself.

[0063] FIG. 5 is a table showing an example of the correspondence between input values ​​and operation states of a finite state automaton. In this embodiment, an example will be described in which the judgment unit 413 inputs a combination of input values ​​of five items, interlock, power source, power source, under test, and under alarm, to the finite state automaton. Each of inputs 1 to 12 in Fig. 5 indicates a combination of input values ​​input to the finite state automaton at one time.

[0064] Input 1, input 2, input 7, and input 8 all indicate that the fatigue testing machine 1 is offline. That is, the second control device 40 can univocally determine that the fatigue testing machine 1 is offline in response to each of inputs 1, 2, 7, and 8.

[0065] On the other hand, input 4 corresponds to both a state in which the fatigue testing machine 1 is in preparation and a state in which the fatigue testing machine 1 has completed testing. Therefore, the state of the fatigue testing machine 1 cannot be uniquely determined based only on input 4. The same applies to input 10.

[0066] If the state when the judgment unit 413 inputs the input 4 to the finite state automaton is the testing state S4, the input 4 triggers the finite state automaton to transition to the test completion state S5. In this case, the finite state automaton after the transition is the test completion state S5. The judgment unit 413 judges that the fatigue testing machine 1 is in the test completion state.

[0067] On the other hand, if the state when the determination unit 413 inputs the input 4 to the finite state automaton is the power source off state S2 or the alarm state S6, the input 4 triggers the finite state automaton to transition to the preparing state S3. In this case, the finite state automaton after the transition is in the preparing state S3. The determination unit 413 determines that the fatigue testing machine 1 is in the test completion state.

[0068] In this way, by causing the state transition of the finite automaton, the determination unit 413 can determine whether the operating state of the fatigue testing machine 1 is the preparation state S3 or the test completion state S5 based on one input 4. In other words, the determination unit 413 can accurately determine the operating state of the fatigue testing machine 1 based on an input value that does not uniquely correspond to any of the operating states of the fatigue testing machine 1.

[0069] The display control unit 415 causes the display unit 44 to display the operating state of the fatigue testing machine 1 determined by the determination unit 413 .

[0070] FIG. 6 is a diagram showing an example of a status display screen 441 that displays the status of the fatigue testing machine 1. As shown in FIG. The status display screen 441 displays the operating status of the fatigue testing machine 1 determined by the determination unit 413. When the second control device 40 is capable of acquiring parameters of multiple fatigue testing machines 1, the status display screen 441 displays the operating status of each of the multiple fatigue testing machines 1.

[0071] The status display screen 441 includes a test machine status display section 442. The test machine status display section 442 is a display area that displays the operating status of one fatigue test machine 1 or fatigue test machine 3. In the example of FIG. 1, the second control device 40 is connected to three fatigue test machines 1A, 1B, and 1C. In this case, the status display screen 441 has four test machine status display sections 442 arranged thereon, each corresponding to the fatigue test machines 1A, 1B, 1C, and the fatigue test machine 3.

[0072] The testing machine status display section 442 has identification information 443 and an icon 444 arranged therein. The identification information 443 is information for identifying the fatigue testing machine 1 or the fatigue testing machine 3 for which the operating status is to be displayed. In other words, the identification information 443 is identification information individually given to the fatigue testing machine 1 and the fatigue testing machine 3, and one fatigue testing machine 1 or one fatigue testing machine 3 can be identified based on the identification information 443.

[0073] The icon 444 is an image indicating the operating state determined by the determination unit 413. Displaying the icon 444 has the advantage that the user can easily recognize the operating state of each of the fatigue testing machines 1 or 3 by looking at the status display screen 441. Instead of or in addition to the icon 444, a character string indicating the operating state determined by the determination unit 413 may be placed in the testing machine status display section 442.

[0074] In this way, the second control device 40 displays the operation states of the multiple fatigue testing machines 1 and the fatigue testing machines 3 on the display unit 44. This allows the user to easily know the operation states of the multiple fatigue testing machines 1 and the fatigue testing machines 3 by looking at the display unit 44. This reduces the burden on the user of managing the multiple fatigue testing machines 1 and the fatigue testing machines 3. Furthermore, even if the fatigue testing machine 1 managed by the second control device 40 is installed in a location away from the second control device 40, the operation state can be managed without any problems. In this case, the user can recognize the operation state of the fatigue testing machine 1 without being present at the location where the fatigue testing machine 1 is installed or traveling to the location where the fatigue testing machine 1 is installed, thereby reducing the burden on the user.

[0075] [1-4. Operation of the management system] FIG. 7 is a flowchart showing an example of the operation of the second control device 40. First, in step ST11, the acquisition unit 412 acquires identification information of the fatigue testing machine 1 and the fatigue testing machine 3 to be managed by the second control device 40. The identification information may be acquired by the acquisition unit 412 executing communication with the first control device 20 and the test control unit 411. Alternatively, the identification information may be included in the setting data 422 in advance and stored in the second memory 42.

[0076] In step ST12, the determination unit 413 associates the identification information acquired by the acquisition unit 412 with the finite automaton stored in the automaton storage unit 423 on a one-to-one basis. Next, in step ST13, the display control unit 415 displays the initial values ​​of the operating states of the fatigue testing machines 1 and 3 to be managed on the state display screen 441 in association with the identification information.

[0077] Then, in step ST14, the acquisition unit 412 selects the fatigue test machine 1 or the fatigue test machine 3 to be updated from among the fatigue test machines 1 and the fatigue test machines 3 about which the identification information was acquired in step ST11.

[0078] Next, in step ST15, the acquisition unit 412 acquires parameters from the fatigue testing machine 1 or the fatigue testing machine 3 selected in step ST12. In step ST16, the input value generating unit 414 generates an input value from the parameters acquired by the acquiring unit 412. Next, in step ST17, the determining unit 413 inputs the input value generated by the input value generating unit 414 to the finite automaton corresponding to the fatigue testing machine 1 or the fatigue testing machine 3 selected in step ST12.

[0079] Next, in step ST18, the determination unit 413 determines the state of the finite automaton after the input value is input. Here, when the input value triggers a transition of the state of the finite automaton, the determination unit 413 determines the state of the finite automaton after the transition. In step ST19, the display control unit 415 updates the display of the state display screen 441 based on the state of the finite automaton determined by the determination unit 413.

[0080] Here, in step ST20, the determination unit 413 determines whether or not an input instructing to end the display of the status display screen 441 has been made by the input unit 43. If an instruction to end the display has been input (step ST20; YES), the display control unit 415 proceeds to step ST22, stops the display of the status display screen 441, and ends this process.

[0081] If an instruction to end the display has not been input (step ST20; NO), in step ST21, the acquiring unit 412 judges whether or not it is time to update the operating state of either of the fatigue testing machines 1 and 3 that are the management targets. The update timing is set in advance for the acquiring unit 412. Specifically, it is included in the setting data 422 and stored in the second memory 42.

[0082] If the timing to update the operation state has not yet arrived for either of the fatigue testing machines 1 and 3 to be managed (step ST21; NO), the acquisition unit 412 returns to step ST20. If the timing to update the operation state has arrived for either of the fatigue testing machines 1 and 3 to be managed (step ST21; YES), the acquisition unit 412 proceeds to step ST14.

[0083] In this way, the fatigue testing machine 3 periodically determines the operating states of the fatigue testing machine 1 and the fatigue testing machine 3 according to a preset update timing by the second control device 40, and updates the display on the status display screen 441. Therefore, the user can check the latest operating states of the fatigue testing machine 1 and the fatigue testing machine 3 by looking at the status display screen 441.

[0084] [2. Second embodiment] Fig. 8 is a diagram showing an example of the configuration of a management system 101 according to the second embodiment. Fig. 9 is a diagram showing an example of the configuration of a management device 60 according to the second embodiment. The management system 101 includes a management device 60 instead of the fatigue testing machine 3 of the management system 100 described in the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and will not be described.

[0085] The management device 60 is connected to the first control devices 20 provided in each of the fatigue testing machines 1A, 1B, and 1C provided in the management system 101 via a network NW. As shown in FIG. 9, the management device 60 includes a third processor 61, a third memory 62, an input unit 63, a display unit 64, and a communication interface 65.

[0086] The management device 60, like the first control device 20 and the second control device 40, includes a computer having a storage device such as an HDD or SSD, and various electronic circuits. The management device 60 is not limited to a computer, and may be configured with one or more appropriate circuits such as integrated circuits such as IC chips and LSIs. When the network NW is the Internet, the management device 60 is configured as, for example, a server device.

[0087] The management device 60 includes a third processor 61, a third memory 62, an input unit 63, a display unit 64, and a communication interface 65.

[0088] The third processor 61 is composed of a CPU, an MPU, etc. The third memory 62 is composed of a ROM, a RAM, etc.

[0089] The management device 60 is not limited to a personal computer, and may be configured with one or more appropriate circuits such as integrated circuits such as IC chips and LSIs. The management device 60 may be configured with, for example, a tablet terminal or a smartphone. The management device 60 may include programmed hardware such as a DSP. The management device 60 may include an SoC-FPGA.

[0090] The management device 60 includes an acquisition unit 612, a determination unit 613, and a display control unit 615. The determination unit 613 includes an input value generation unit 614. Specifically, the third processor 61 of the management device 60 executes a control program 621 stored in the third memory 62 to function as the acquisition unit 612, the determination unit 613, the input value generation unit 614, and the display control unit 615.

[0091] The third memory 62 stores a control program 621 and setting data 622. The third memory 62 also has an automaton storage unit 623 that stores a finite automaton. In detail, the third processor 61 executes the control program 621 to cause the third memory 62 to function as the automaton storage unit 623.

[0092] The input unit 63 and the display unit 64 are configured similarly to the input unit 43 and the display unit 44, respectively. The display unit 44 corresponds to an example of a display. The communication interface 65 is configured similarly to the communication interface 45. The communication interface 65 is connected to the network NW and communicates with the first control device 20 via the network NW.

[0093] The acquisition unit 612, the determination unit 613, the input value generation unit 614, and the display control unit 615 function in the same manner as the acquisition unit 412, the determination unit 413, the input value generation unit 414, and the display control unit 415, respectively.

[0094] The acquiring unit 612 executes communication with the first control device 20 via the communication interface 65, and acquires parameters related to the operation of the fatigue testing machine 1 from the first control device 20. In the configuration example shown in Fig. 8, the management device 60 is connected to the fatigue testing machines 1A, 1B, and 1C. In this case, the acquiring unit 612 acquires parameters related to the operation of the fatigue testing machine 1A, parameters related to the operation of the fatigue testing machine 1B, and parameters related to the operation of the fatigue testing machine 1C, respectively.

[0095] The determination unit 613 determines the operating state of the fatigue testing machine 1 based on the parameters acquired by the acquisition unit 612. In the process of determining the operating state of the fatigue testing machine 1, the determination unit 613 uses a state transition model in the same manner as the determination unit 413. The state transition model is a virtual machine that imitates the operating state of the fatigue testing machine 1, and in this embodiment, a finite automaton stored in the automaton storage unit 623 is used as an example of the state transition model. The finite automaton is as described in the first embodiment.

[0096] The judgment unit 613 includes an input value generation unit 614. The input value generation unit 614 generates input values ​​for the finite automaton based on the parameters acquired by the acquisition unit 612 from the fatigue testing machine 1. The input values ​​generated by the input value generation unit 614 may be the same as the parameters acquired by the acquisition unit 612, or may be different values. For example, the judgment unit 613 generates fewer types of input values ​​from various types of parameters using the input value generation unit 614. This makes it possible to support fatigue testing machines 1 with various specifications and reduce the types of input values ​​for the finite automaton.

[0097] The determination unit 613 inputs the input value generated by the input value generation unit 614 to the finite automaton to transition the state of the finite automaton, and determines the operating state of the fatigue testing machine 1 based on the state of the finite automaton after the transition. This makes it possible to appropriately determine the operating state of the fatigue testing machine 1.

[0098] When a plurality of fatigue testing machines 1 and the management device 60 can communicate with each other via the network NW, the acquisition unit 612 acquires parameters from each fatigue testing machine 1. The input value generation unit 614 generates an input value from the parameters for each fatigue testing machine 1. The input value generation unit 614 uses a finite automaton corresponding to each fatigue testing machine 1 and inputs an input value to each finite automaton to individually determine the operation state of each fatigue testing machine 1. For example, the input value generation unit 614 generates an input value corresponding to the fatigue testing machine 1A based on the parameters acquired from the fatigue testing machine 1A. The same applies to the fatigue testing machines 1B and 1C. The judgment unit 613 judges the operation state of the fatigue testing machine 1A by inputting an input value corresponding to the fatigue testing machine 1A to the finite automaton corresponding to the fatigue testing machine 1A to cause a state transition.

[0099] The display control unit 615 causes the display unit 64 to display the operating state of the fatigue testing machine 1 determined by the determination unit 613. For example, the display control unit 615 causes the display unit 64 to display the state display screen 441 of FIG.

[0100] The management device 60 executes the operation described with reference to FIG. 7 in the same manner as the second control device 40 described in the first embodiment. According to this configuration, the management device 60 can manage the operating state of the fatigue testing machine 1 in the same manner as the second control device 40. That is, the management device 60, which does not have the function of controlling the testing machine main body 10, acquires parameters of the fatigue testing machine 1. The management device 60 determines the operating state of the fatigue testing machine 1 by causing a state transition of the finite automaton based on the parameters, and displays the determined operating state on the display unit 64. Therefore, the user can check the operating state of the fatigue testing machine 1 by looking at the screen displayed by the display unit 64.

[0101] The management device 60 is a device that does not have the testing machine main body 10, and is configured, for example, by a personal computer. This eliminates most of the restrictions on the installation location of the management device 60. Specifically, when one company uses multiple fatigue testing machines 1, a usage mode in which one management device 60 is connected to these multiple fatigue testing machines 1 is assumed. In this case, the management device 60 can be installed, for example, in a room or building separate from the room for material testing in which the fatigue testing machines 1 are installed. Furthermore, in cases where the network NW may include a public line network or a mobile communication network, the management device 60 may be realized by a portable computer.

[0102] Furthermore, as another usage form, it is assumed that multiple fatigue testing machines 1 used by multiple companies are connected to one or multiple management devices 60. In this case, the management device 60 is connected to many fatigue testing machines 1 installed in multiple user companies via a network NW including a wide area communication network such as the Internet.

[0103] In this usage form, a terminal device such as a personal computer may access the management device 60, and the status display screen 441 may be displayed by the terminal device. The terminal device may be a device managed by a user company. In this case, the terminal device is associated with a fatigue testing machine 1 managed by the same user company as the terminal device among the multiple fatigue testing machines 1 connected to the management device 60. In this configuration, when data of the status display screen 441 is requested from the terminal device, the management device 60 transmits data of the status display screen 441 that displays the operating status of the fatigue testing machine 1 associated with the terminal device that made the request to the terminal device. This allows the status display screen 441 that shows the operating status of the fatigue testing machine 1 used by the user company to be displayed by the terminal device used by the user company. In addition, information regarding the operating status of the fatigue testing machine 1 used by the user company is not sent to other user companies. Therefore, while protecting information regarding the fatigue testing machine 1 of the user company, the fatigue testing machines 1 used by multiple user companies can be managed by the management device 60 operated by a company or organization different from the user company.

[0104] [3. Aspects and Effects] It will be understood by those skilled in the art that the above-described embodiment is a specific example of the following aspects.

[0105] (Section 1) The management device relating to the first embodiment includes an acquisition unit (412) that acquires parameters of a material testing machine (1, 3), and a judgment unit (413, 613) that judges which of a plurality of states the material testing machine is in, and the judgment unit judges the state of the material testing machine after the transition by transitioning the state of the material testing machine based on the state before the transition of the material testing machine and the value of the parameter in a state transition diagram that defines the transition of the state of the material testing machine.

[0106] According to the management device described in paragraph 1, the state of the material testing machine is appropriately determined by transitioning the state of the material testing machine based on the parameters. Therefore, the user does not have to directly visually check the state of the material testing machine, and the burden on the user in managing the material testing machine can be reduced.

[0107] (Section 2) In the management device described in paragraph 1, the judgment unit causes a state transition of the finite automaton that constitutes the state transition diagram based on the value of the parameter, and judges the state of the materials testing machine based on the state of the finite automaton after the state transition.

[0108] According to the management device described in paragraph 2, the state of the material testing machine is determined by utilizing a finite automaton, so that the state of the material testing machine can be appropriately determined even when the relationship between the state of the material testing machine and the parameters is complex.

[0109] (Section 3) In the management device described in paragraph 2, the finite automaton undergoes a state transition when a value that satisfies a transition condition is input, and the judgment unit converts the parameter into an input value and inputs the converted value to the finite automaton.

[0110] According to the management device described in paragraph 3, input values ​​obtained from parameters are input to the finite automaton to cause the finite automaton to undergo a state transition. This simplifies the rules for the state transition of the finite automaton, so that the state of the material testing machine can be easily determined even when the relationship between the parameters and the conditions for the state transition of the material testing machine is complicated.

[0111] (Section 4) The management device according to any one of claims 1 to 3 further includes a display control unit (415, 615) that displays on a display (44, 64) the status of the material testing machine determined by the determination unit in association with identification information that identifies the material testing machine.

[0112] According to the management device described in the fourth aspect, the user can easily know the state of the material testing machine by visual inspection.

[0113] (Section 5) In the management device described in item 4, the acquisition unit acquires the parameters of a plurality of the material testing machines, and the judgment unit judges a state of each of the plurality of material testing machines.

[0114] According to the management device described in the fifth aspect, the statuses of the multiple material testing machines are determined and displayed, so that the user can easily know the statuses of the multiple material testing machines by visual inspection.

[0115] (Section 6) In the management device described in paragraph 5, the display control unit displays on the display, for each of the plurality of material testing machines, the state of the material testing machine determined by the determination unit and the identification information in association with each other.

[0116] According to the management device described in paragraph 6, a user can easily understand the state of each material testing machine by looking at the display.

[0117] (Section 7) In the management device described in any one of paragraphs 1 to 6, the multiple material testing machines include a first material testing machine (3) and a second material testing machine (1), the management device is equipped with a test control unit (411) that controls the operation of the first material testing machine, the management device is connected to a control device (20) that controls the second material testing machine, and the acquisition unit acquires the parameters of the first material testing machine and the second material testing machine.

[0118] According to the management device described in the seventh aspect, any one of the multiple material testing machines has a function of determining the state of the other material testing machines. This eliminates the need to install a device for determining the state of the material testing machines separately from the material testing machines. Therefore, a device for managing the state of the material testing machines can be easily introduced.

[0119] (Section 8) In the management device described in any one of paragraphs 1 to 6, the acquisition unit (612) is connected to each of the plurality of material testing machines (1), and acquires the parameters by communicating with each of the plurality of material testing machines (1).

[0120] According to the management device described in the eighth aspect, by connecting a management device separate from the material testing machine to the material testing machine, it is possible to manage the state of the material testing machine.

[0121] (Section 9) The management system for a materials testing machine according to the second embodiment is a management system for a materials testing machine (100, 101) comprising a materials testing machine (1, 3) and a management device (3, 6) for managing the state of the materials testing machine, the management device comprising an acquisition unit (412, 612) for acquiring parameters of the materials testing machine, and a judgment unit (413, 613) for judging in which of a plurality of states the materials testing machine is in, and the judgment unit judges the state of the materials testing machine after the transition by transitioning the state of the materials testing machine based on the state before the transition of the materials testing machine and the value of the parameter in a state transition diagram that defines the transition of the state of the materials testing machine.

[0122] According to the management system for a materials testing machine described in paragraph 9, the same effects as those of the management device described in paragraph 1 are achieved.

[0123] [4. Other embodiments] The management systems 100 and 101 according to the present embodiment are merely illustrative of aspects of the management system for a materials testing machine according to the present invention, and can be modified and applied as desired without departing from the spirit of the present invention. For example, the network NW that communicatively connects the fatigue testing machine 3 or the management device 60 with the multiple fatigue testing machines 1 may be a LAN, a WAN, or the Internet.

[0124] For example, the fatigue testing machine provided in the management systems 100 and 101 is an example of a material testing machine, and can be modified and applied as desired without departing from the spirit of the present invention. For example, instead of or in addition to the fatigue testing machine, a universal testing machine, a tensile testing machine, a compression testing machine, a bending testing machine, a torsion testing machine, a creep testing machine, a spring testing machine, an impact testing machine, a friction testing machine, a wear testing machine, a heat generation testing machine, and the like can be managed.

[0125] 3 and 9 show functional configurations, and the specific implementation form is not particularly limited. In other words, it is not necessary to implement hardware that corresponds to each functional unit individually, and it is of course possible to implement a configuration in which one processor executes a program to realize the functions of multiple functional units. Also, some of the functions realized by software in the above embodiments may be realized by hardware, or some of the functions realized by hardware may be realized by software.

[0126] In addition, the processing units in the flowchart shown in Fig. 7 are divided according to the main processing contents in order to make it easier to understand the processing by the second control device 40. There is no limitation to the manner of division or names of the processing units shown in the flowchart of Fig. 7, and the processing units can be divided into more processing units according to the processing contents, or one processing unit can be divided to include more processes. In addition, the processing order of the above flowchart is not limited to the example shown in the figure.

[0127] The second control device 40 causes the second processor 41 to execute the control program 221. The control program 221 can also be recorded in a computer-readable recording medium. Similarly, the control program 621 that the management device 60 causes the third processor 61 to execute can also be recorded in a computer-readable recording medium. The recording medium can be a magnetic or optical recording medium or a semiconductor memory device. Specifically, a portable or fixed recording medium such as a flexible disk, HDD, CD-ROM (Compact Disk Read Only Memory), DVD, Blu-ray (registered trademark) Disc, magneto-optical disk, flash memory, or card-type recording medium can be used. The recording medium can also be a non-volatile storage device such as a RAM, ROM, or HDD that is an internal storage device provided in the fatigue tester 3 or the management device 60. The control programs 221 and 621 can also be stored in a server device or the like, and the control programs 221 and 621 can be downloaded from the server device to the second control device 40 or the management device 60. [Explanation of symbols]

[0128] 1A, 1B, 1C Fatigue testing machine (material testing machine) 3. Fatigue testing machine (control device) 10 Testing machine body 11 Foundation 12a, 12b post 13 York 14 Crosshead 15 Hydraulic Actuator 15a Piston rod 16a Lower jig 16b Upper jig 17 Load Cell 18 Servo valve 19 Differential transformer 20 First control device 21 First Processor 22 First Memory 23 Input section 24 Display section 25 Communication Interface 26 Test Machine Interface 40 Second control device 41 Second Processor 42 Second Memory 43, 63 Input section 44, 64 Display 45, 65 Communication Interface 60 Management device 61 3rd processor 62 Third Memory 100, 101 Management system 211 Test control section 212 Communication control section 221, 621 Control Program 411 Test Control Unit 412, 612 Acquisition Department 413, 613 Judgment section 414, 614 Input value generation unit 421, 621 Control Program 422, 622 setting data 423, 623 Automaton Memory Unit 441 Status display screen 442 Testing machine status display unit 443 Identification Information 444 Icons

Claims

1. An acquisition unit for acquiring parameters of a material testing machine; a determination unit that determines which of a plurality of states the material testing machine is in, the determination unit determines a state after the transition of the material testing machine by transitioning the state of the material testing machine based on a state before the transition of the material testing machine and the value of the parameter in a state transition diagram that defines the transition of the state of the material testing machine; The judgment unit causes a state transition of a finite automaton constituting the state transition diagram based on the value of the parameter, and judges the state of the materials testing machine based on the state of the finite automaton after the state transition.

2. The finite automaton undergoes a state transition when a value that satisfies a transition condition is input, The management device according to claim 1 , wherein the determination unit converts the parameter into a value for input and inputs the converted value to the finite state automaton.

3. 3. The management device according to claim 1, further comprising a display control unit that displays, on a display, the state of the material testing machine determined by the determination unit in association with identification information that identifies the material testing machine.

4. The acquisition unit acquires the parameters of the plurality of material testing machines, The management device according to claim 3 , wherein the determining unit determines a state of each of the plurality of material testing machines.

5. 5. The management device according to claim 4, wherein the display control unit displays, on the display, the state of the material testing machine determined by the determination unit and the identification information for each of the plurality of material testing machines in association with each other.

6. the plurality of material testing machines includes a first material testing machine and a second material testing machine; The management device includes a test control unit that controls an operation of the first materials testing machine, The management device is connected to a control device that controls the second materials testing machine, The management device according to claim 4 , wherein the acquisition unit acquires the parameters of the first material testing machine and the second material testing machine.

7. a material testing machine connected to each of the plurality of material testing machines; The management device according to claim 4 , wherein the acquisition unit acquires the parameters by executing communication with each of the plurality of material testing machines.

8. A management system for a material testing machine, comprising: a material testing machine; and a management device for managing a state of the material testing machine, The management device includes: An acquisition unit for acquiring parameters of a material testing machine; a determination unit that determines which of a plurality of states the material testing machine is in, the determination unit determines a state after the transition of the material testing machine by transitioning the state of the material testing machine based on a state before the transition of the material testing machine and the value of the parameter in a state transition diagram that defines the transition of the state of the material testing machine; The judgment unit causes a state transition of a finite automaton that constitutes the state transition diagram based on the value of the parameter, and judges the state of the material testing machine based on the state of the finite automaton after the state transition.

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