JP2017126248A - Valve operation checking device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To check opening and closing operations of a valve more accurately.SOLUTION: A transient state confirmation unit 17 confirms whether or not a valve opening degree Q(i) of a valve 21 is in a transient state where the valve opening degree is changing toward an indication value Qs. In the case where the end of the transient state is not confirmed within a determination period tj, the determination period tj is extended to a transient limit period tc. After the end of the transient state has been confirmed, a stable state confirmation unit 18 confirms whether or not a value of the valve opening degree Q (i) is in a stable state. After the stable state has been confirmed, an operation determination unit 19 determines whether opening and closing operations of the valve 21 are normal or abnormal by comparison between the valve opening degree Q(i) and the indication value Qs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve operation check technique for checking the opening / closing operation of a valve installed in a facility.

Generally, in facilities such as production plants and buildings, a valve operation check device is provided, and data communication is performed via a communication network with a valve that is one of field devices installed in the facility. Checking the opening and closing operation of the valve.
Conventionally, in the valve operation check device, when checking the opening / closing operation of the valve, it is confirmed whether or not the actual valve opening normally follows the specified valve opening.

JP 2012-208696 A JP 2014-135020 A

FIG. 5 is an explanatory diagram showing an example of a conventional valve operation check operation.
First, an instruction value Qs for a target valve opening is set for the valve to be checked, and the system waits for a certain waiting period tw corresponding to the valve opening / closing operation time. In the subsequent determination period tj, the valve opening Q detected by the valve itself is acquired from the valve at a constant acquisition interval td, and the valve opening Q is determined within the determination period tj determined by the number of acquisitions of the valve opening Q. Determines whether the opening / closing operation of the valve is normal or abnormal depending on whether the tracking has been completed after reaching the tracking completion range Qsp of the indicated value Qs.

  At this time, it is determined whether or not the value of the valve opening Q is stable within a certain range, and if it is not stable, the determination period is increased by increasing the number of times the valve opening Q is acquired. When tj is extended to the limit period tj ′ and the stable state is reached within the limit period tj ′, the follow-up completion determination is performed, and when the stable state is not reached within the limit period tj ′, the valve is Is determined to be abnormal. As a result, as shown in the characteristic 60, it is possible to check the operation of a valve whose valve opening Q reaches the command value Qs after the limit period tj has elapsed.

  However, in such a conventional technique, when the valve opening is not in a stable state, the determination period is merely extended. As shown by the characteristic 62, all the valves whose valve opening does not change in the middle are judged as abnormal, and there is a problem that the operation check cannot be performed accurately.

  The present invention has been made to solve such problems, and it is an object of the present invention to provide a valve operation check technique that can more accurately check the opening / closing operation of a valve.

  In order to achieve such an object, a valve operation check device according to the present invention includes an instruction value setting unit that sets an instruction value indicating a target valve opening degree for a valve to be checked, and the instruction value. In the determination period after setting, the opening degree obtaining unit that periodically obtains the valve opening degree from the valve, and whether or not the valve opening degree is in a transient state changing toward the indicated value If the end of the transient state cannot be confirmed within the determination period, the transient state confirmation unit extending the determination period to the transient limit period, and after confirming the end of the transient state, the valve By comparing the valve opening and the indicated value after the stable state is confirmed, and a stable state confirmation unit that confirms whether or not the value of the opening is in a stable state, Valve opening / closing operation And a motion determination section determines the normality / abnormality.

  Also, in one configuration example of the valve operation check device according to the present invention, when the transient state confirmation unit cannot confirm the end of the transient state within the transient limit period, the valve opening / closing operation is abnormal. It is determined that there is.

  Further, in one configuration example of the valve operation check device according to the present invention, when the stable state confirmation unit cannot confirm the stable state within the determination period, the determination period is extended to a stability limit period. It is a thing.

  Further, in one configuration example of the valve operation check device according to the present invention, when the stable state confirmation unit cannot confirm the end of the transient state within the stability limit period, the valve opening / closing operation is abnormal. It is determined that there is.

  Further, another valve operation check device according to the present invention includes an instruction value setting unit that sets an instruction value indicating a target valve opening degree for a valve to be checked, and a determination after the instruction value is set. In a period, an opening degree obtaining unit for periodically obtaining the valve opening degree from the valve, and a transient state confirmation for confirming whether or not the valve opening degree is in a transient state changing toward the indicated value And an operation determination unit that determines whether the opening / closing operation of the valve is normal or abnormal by comparing the valve opening and the instruction value after confirming the end of the transient state.

  Further, the valve operation check method according to the present invention includes an instruction value setting step for setting an instruction value indicating a target valve opening degree for a valve to be checked, and a determination period after the instruction value is set. An opening degree obtaining step for periodically obtaining the valve opening degree from the valve, and confirming whether or not the valve opening degree is in a transient state changing toward the indicated value, and within the determination period If the end of the transient state is not confirmed, a transient state confirmation step for extending the determination period to the transient limit period, and after confirming the end of the transient state, the value of the valve opening is stabilized. A stable state confirmation step for confirming whether or not the valve is in a stable state; and after the stable state is confirmed, the valve opening and closing operation is compared by comparing the valve opening and the indicated value. And a motion determination step of determining atmospheric / abnormal.

  Further, another valve operation check method according to the present invention includes an instruction value setting step for setting an instruction value indicating a target valve opening degree for a valve to be checked, and a determination after setting the instruction value. In the period, an opening degree obtaining step for periodically obtaining the valve opening degree from the valve, and a transient state confirmation for confirming whether or not the valve opening degree is in a transient state changing toward the indicated value And an operation determination step of determining normality / abnormality of the valve opening / closing operation by comparing the valve opening degree and the indicated value after confirming the end of the transient state.

  According to the present invention, it is possible to check the opening / closing operation of a valve more accurately for a valve with a gradual change in valve opening or a valve in which the valve opening does not change in the middle. As a result, the work and time required for checking the operation of the valve can be greatly reduced, and management and maintenance costs can be reduced.

It is a block diagram which shows the structure of the valve operation check apparatus concerning 1st Embodiment. It is a flowchart which shows the valve operation check process concerning 1st Embodiment. It is explanatory drawing which shows the valve operation check operation example concerning 1st Embodiment. It is a flowchart which shows the valve operation check process concerning 2nd Embodiment. It is explanatory drawing which shows the conventional valve operation check operation example.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a valve operation check device 10 according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating the configuration of the valve operation check device according to the first embodiment.

  The valve operation check device 10 includes an information processing device such as a server device or a controller as a whole, and is used in a device management system 1 that monitors and controls a field device 20 installed in a facility. It has a function of checking the operation of the valve 21, which is one of the two.

In the facility, various field devices 20 such as a valve 21, a flow meter 22 and a thermometer 23 are installed. These field devices 20 are connected via a transmission line L2 to a controller, an I / O module, a field bus controller, and the like. Are accommodated in the higher-level device 30.
The host device 30 has a function of performing data transmission with the subordinate field device 20 connected via the transmission line L2, and a function of performing data communication with the valve operation check device 10 connected via the communication line L1. doing.

[Valve operation check device]
Next, the configuration of the valve operation check device 10 according to the present embodiment will be described in detail with reference to FIG.
The valve operation check apparatus 10 includes, as main functional units, a communication I / F unit 11, an operation input unit 12, a screen display unit 13, a storage unit 14, an instruction value setting unit 15, an opening degree acquisition unit 16, a transient state check. A unit 17, a stable state confirmation unit 18, and an operation determination unit 19 are provided.

  The communication I / F unit 11 has a function of exchanging an instruction value for the valve 21 and a valve opening detected by the valve 21 by performing data communication with the host device 30 via the communication line L1.

The operation input unit 12 includes an operation input device such as a keyboard, a mouse, and a touch panel, and has a function of detecting an operator's operation.
The screen display unit 13 includes a screen display device such as an LCD, and has a function of displaying various information such as an operation menu screen, a setting screen, and a check result screen on the screen.
The storage unit 14 includes a storage device such as a hard disk or a semiconductor memory, and has a function of storing various processing information and programs used in the valve operation check process.

The instruction value setting unit 15 has a function of setting an instruction value Qs indicating a target valve opening degree to the check target valve 21 via the communication I / F unit 11.
The opening obtaining unit 16 waits for the waiting period tw after setting the instruction value Qs from the valve 21 to be checked via the communication I / F unit 11, and then in the determination period tj, the valve opening Q ( i) (i = 1, 2,...) is periodically acquired at a constant acquisition interval td.

  The transient state confirmation unit 17 determines the valve opening Q (()) based on the change amount ΔQ (i) = Q (i) −Q (i−1) of the valve opening Q (i) acquired by the opening acquisition unit 16. i) a function for confirming whether or not a transient state is changing toward the instruction value Qs, and a limit number of times of opening degree acquisition number N when the end of the transient state cannot be confirmed within the determination period tj The transition limit number Nc is used to extend the determination period tj to the transient limit period tc, and the end of the transient state is not confirmed within the transient limit period tc, and the opening degree acquisition count N reaches the transient limit period tc. At this time, it has a function of determining that the opening / closing operation of the valve is abnormal.

The stable state confirmation unit 18 includes a moving average Q ′ (i) = {Σ _{k = i} ^iK−1 Q (k)} / K and Q ′ () of the valve opening Q (i) acquired by the opening acquisition unit 16. Comparing the allowable range ε (i) = Q ′ (i) ± β consisting of the allowable error β in i) and the valve opening Q (i) from the latest one up to M items If the valve opening Q (i) is in a stable state where the valve opening Q (i) is stable within the allowable range ε (i) and the stable state cannot be confirmed within the determination period tj, By setting the limit number of times for the frequency acquisition number N as the stability limit number Ns, a function for extending the determination period tj to the stability limit period ts, and a stable state is not confirmed by the stability limit period ts, and the opening acquisition number N is stable. It has a function of determining that the opening / closing operation of the valve is abnormal when the limit period ts is reached.

  The time length of the determination period tj is defined by the product of the opening degree acquisition count N and the acquisition interval td. The prescribed number Np is set as the initial value of N, and the initial time length is tj0 = td × (Np−1). Since the transient limit number Nc is larger than the specified number Np, as a result, the transient limit period tc is longer than tj0. Further, the transient limit number Nc is larger than the stable limit number Ns, and Np <Ns <Nc.

For example, even when the valve 21 has the end timing of the transient state after the stability limit period ts defined by Ns, there is a possibility of following the instruction value Qs as long as it is in the transient state. Therefore, by setting Ns <Nc, it is possible to increase the chances that the completion of the excessive state can be confirmed by taking up the possibility of the completion of the follow-up without ignoring it.
Further, the transient limit period tc defined by the transient limit number Nc is provided as a countermeasure for the case where the transient state is not confirmed due to the malfunction of the valve 21, and thus the operation check can be automatically terminated. .

  After confirming the end of the transient state and the stable state, the operation determination unit 19 detects the follow-up completion range Qsp = Qs ± α consisting of the tolerance value α of the instruction value Qs and Qs, and the latest valve opening degree Q acquired last. By comparing (i) with the function of confirming whether or not the follow-up completion state in which the follow-up of the valve opening Q (i) is completed with respect to the instruction value Qs and the follow-up completion state are confirmed. Has a function of determining that the valve opening / closing operation is normal and a function of determining that the valve opening / closing operation is abnormal when the tracking completion state is not confirmed.

[Operation of First Embodiment]
Next, the operation of the valve operation check device 10 according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart showing a valve operation check process according to the first embodiment.
The valve operation check device 10 starts the valve operation check process of FIG. 2 in accordance with the operator operation detected by the operation input unit 12.

  First, the instruction value setting unit 15 sets the instruction value Qs indicating the target valve opening Q (i) to the valve 21 to be checked via the communication I / F unit 11 (step 100). The degree acquisition unit 16 waits for the standby period tw after setting the instruction value Qs from the valve 21 to be checked via the communication I / F unit 11 (step 101), and then in the subsequent determination period tj The opening degree Q (i) is acquired from the valve 21 (step 102).

  Next, the opening degree obtaining unit 16 confirms whether the opening degree obtaining number N obtained the valve opening degree Q (i) has reached the specified number Np (step 103), and if not (step 103). : NO), after waiting for the acquisition interval td (<tw) (step 104), the process returns to step 102.

  On the other hand, when the opening degree acquisition number N reaches the specified number of times Np (step 103: YES), the transient state confirmation unit 17 changes the amount ΔQ (i) = Q (i) of the acquired valve opening degree Q (i). Based on -Q (i-1), it is confirmed whether or not the valve opening Q (i) is in a transient state where the valve opening Q (i) is changing toward the command value Qs (step 105).

  At this time, when the instruction value Qs is set in the direction to open the valve, it is determined that the state is a transient state when ΔQ (i) indicates a positive value larger than zero, and the other case is set as a non-transient state. Determine the end of the transient state. In addition, when the instruction value Qs is set in the direction in which the valve is closed, a transitional state is determined when ΔQ (i) indicates a negative value smaller than zero, and a transitional state other than this is set as a non-transient state. It is determined that the state has ended. Thereby, the transient state can be accurately confirmed according to the opening / closing direction of the valve 21.

Here, when it is confirmed that the state is in the transient state (step 105: YES), the transient state confirmation unit 17 confirms whether the opening degree acquisition number N has reached the transient limit number Nc (step 106). If not (step 106: NO), the process returns to step 104.
As a result, the limit number for the opening degree acquisition number N is changed from the specified number Np to the transient limit number Nc, and the determination period tj is extended to the transient limit period tc. Further, by confirming that the state is in a transient state, the opening / closing operation of the valve 21 is not completed at present, and the valve opening Q (i) gradually changes with respect to the instruction value Qs and is following. As a result, the execution of the tracking completion determination is postponed.

On the other hand, when the opening degree acquisition count N reaches the transient limit count Nc (step 106: YES), the transient state confirmation unit 17 displays a message recommending that the transient limit count Nc be increased and rechecked on the screen display unit 13. (Step 107), it is determined that the opening / closing operation of the valve 21 to be checked is abnormal, the determination result is displayed on the screen display unit 13 (step 112), and a series of valve operation check processes are performed. Exit.
Accordingly, the operation check is automatically forcibly terminated, and it is possible to appropriately cope with a case where a transient state is not confirmed due to a malfunction of the valve 21.

  Further, when it is confirmed in step 105 that the transient state has ended without being in a transient state (step 105: NO), the stable state confirmation unit 18 acquires the valve opening degree Q (i) acquired by the opening degree acquisition unit 16. ) Moving average Q ′ (i) and allowable range ε (i) consisting of allowable error β of Q ′ (i), and valve opening Q (i) from the latest to M By comparing as a target, it is confirmed whether or not the valve opening Q (i) is in a stable state within the allowable range ε (i) (step 110).

  In this case, specifically, for each of the valve opening Q (i−M−1) retroactive by M and the latest valve opening Q (i), K valve openings Q (i− K-1) to Q (i) are calculated and the moving average Q ′ (i) is calculated, and Q (()) within an allowable range ε (i) = Q ′ (i) ± β using a preset allowable error β. When it is confirmed in all of Q (i-M-1) to Q (i) that i) is included, it is confirmed that it is in a stable state. Thereby, a stable state can be confirmed with high accuracy. Note that the method for determining whether or not the valve opening Q (i) is stable within a certain range is not limited to this, and other determination methods may be used.

Here, when it cannot be confirmed that the vehicle is in a stable state (step 110: NO), the stable state confirmation unit 18 confirms whether the opening degree acquisition count N has reached the stability limit count Ns (step 111), If not reached (step 111: NO), the process returns to step 104.
As a result, the limit number for the opening degree acquisition number N is changed from the specified number Np to the stability limit number Ns, and the determination period tj is extended to the stability limit period ts. Further, by confirming that the valve is in a stable state, it is confirmed that the opening / closing operation of the valve 21 is not stable at present, and the execution of the tracking completion determination is postponed.

  Since the stability limit number Ns is smaller than the transient limit number Nc, if the limit number is changed to Nc, it may be considered that N is already greater than Nc. In this case, the limit number may be left as Ns, or a relative value obtained by adding a preset stable extension number Ns ′ to N when initially determined in step 111 may be set as Ns. . Thereby, the stable state of valve opening degree Q (i) can be determined appropriately.

On the other hand, when the opening degree acquisition count N has reached the stability limit count Ns (step 111: YES), the routine proceeds to step 112 described above, and it is determined that the opening / closing operation of the valve 21 to be checked is abnormal. The determination result is displayed on the screen by the screen display unit 13 (step 112), and the series of valve operation check processing is terminated.
Accordingly, the operation check is automatically forcibly terminated, and it is possible to appropriately cope with the case where the stable state is not confirmed due to the malfunction of the valve 21.

  If it is confirmed in step 110 that the vehicle is in a stable state (step 110: YES), the motion determination unit 19 follows the tracking completion range Qsp = Qs ± consisting of the instruction value Qs and a preset allowable error α. By comparing α with the latest valve opening Q (i) acquired at the end, it is determined whether or not the follow-up completion state in which the follow-up of the valve opening Q (i) is completed with respect to the instruction value Qs. Confirm (step 120).

  Here, when the valve opening Q (i) is included in the follow-up completion range Qsp and the follow-up completion is confirmed (step 120: YES), the operation determination unit 19 opens and closes the valve 21 to be checked. It is determined that the operation is normal, the determination result is displayed on the screen display unit 13 (step 121), and the series of valve operation check processes is terminated.

  On the other hand, when the valve opening Q (i) is not included in the follow-up completion range Qsp and the follow-up completion cannot be confirmed (step 120: NO), the valve opening Q (i) reaches the instruction value Qs. Since it is in a stable state in the middle, the process proceeds to step 112 described above, and it is determined that the opening / closing operation of the valve 21 to be checked is abnormal, and the determination result is displayed on the screen display unit 13. Then (step 112), a series of valve operation check processing is completed.

[Operation example]
Next, an example of the operation of the valve operation check device 10 according to the present embodiment will be described with reference to FIG. FIG. 3 is an explanatory diagram illustrating an example of a valve operation check operation according to the first embodiment.
Here, the case where the specified number Np = 3, the stability limit number Ns = 6, the transition limit number Nc = 9, the moving average opening number K = 3, and the stable state confirmation number M = 1 will be described as an example. These are merely examples, and the present invention is not limited to these settings.

The instruction value Qs is set for the valve 21 to be checked at time T0, the determination period tj is started from time T1 when the standby period tw has elapsed, and the valve opening Q (i ) Are acquired in order.
Here, when the valve operation of the valve 21 is slow and has a characteristic 50 that follows Qs after time T7 after the stability limit number Ns, the variation ΔQ (i) gradually decreases after rising at time T1. At time T8, it becomes zero.

  Therefore, at time T3, since the opening degree acquisition count N reaches the specified count Np, it is checked here for the first time whether or not it is in a transient state. At this time, since ΔQ (3) indicates a positive value, it is determined to be in a transient state at time T3. For this reason, the limited number of times for the opening degree acquisition number N is changed from the prescribed number Np to the transient limit number Nc, and the valve opening degree Q (i) is continuously acquired after time T4.

Thereby, from time T4 to time T7, it is determined that the state is in a transient state, and since it is determined as a non-transient state only at time T8, a stable state is confirmed after time T8.
Here, since the valve opening Q (i) has reached the command value Qs after time T7, the moving average Q ′ (i) also approaches Q (i) after time T7. Therefore, Q (i) is included in the allowable range ε (i) = Q ′ (i) ± β, and it is determined that the state is stable at time T8.

Thus, it is confirmed whether or not the follow-up is completed for the first time at time T8. At this time, since the tracking completion range Qsp = Qs ± α includes Q (i), it is confirmed that the tracking is completed. For this reason, it is determined that the opening / closing operation of the valve 21 to be checked is normal.
Therefore, even if the valve 21 has a characteristic 50 such that the valve operation is slow and the stability limit number Ns is reached and the valve opening Q (i) reaches the command value Qs, the opening / closing operation is determined to be normal. Will be.

  In the case where the valve opening Q (i) reaches the command value Qs within the specified number of times Np as in the characteristic 51, the transient state ends and the stable state is reached by time T3 corresponding to the specified number of times Np. Will not be changed. If the stable state is not confirmed after the end of the transient state is confirmed, the limit number is changed to the stability limit number Ns, and the determination period tj is extended to the stability limit period ts.

  Further, in the case where the valve opening degree Q (i) reaches the command value Qs within the stability limit number Ns after the specified number Np as in the characteristic 52, until the time T6 corresponding to the stability limit number Ns. However, since the end of the transient state is not confirmed by the time T3 corresponding to the specified number Np, the limit number is changed to the transient limit number Nc, and the determination period tj is transient. It will be extended to the limit period tc.

  On the other hand, in the case where the valve opening degree Q (i) does not reach the instruction value Qs and becomes stable in the middle as in the characteristic 53, the end of the transient state is completed by time T3 corresponding to the specified number of times Np. If not confirmed, the limit count is changed to the transient limit count Nc, and the determination period tj is extended to the transient limit period tc. Thereafter, although the end of the transient state and the stable state are confirmed, the valve opening degree Q (i) is not included in the follow-up completion range Qsp, so that it is determined that the opening / closing operation is abnormal.

[Effect of the first embodiment]
As described above, in the present embodiment, the transient state confirmation unit 17 confirms whether or not the transient state where the valve opening Q (i) of the valve 21 is changing toward the instruction value Qs is determined. If the end of the transient state cannot be confirmed within the period tj, the determination period tj is extended to the transient limit period tc, and after the stable state confirming unit 18 confirms the end of the transient state, the valve opening Q (i ) Is confirmed to be in a stable state, and the operation determination unit 19 compares the valve opening Q (i) with the indicated value Qs after the stable state is confirmed. The normal / abnormal of the opening / closing operation of the valve 21 is determined.

  Thus, after the end of the transient state and the stable state are confirmed, the completion of the follow-up of the valve opening Q (i) with respect to the instruction value Qs is confirmed, and normality / abnormality of the opening / closing operation is determined. For this reason, in the transient state in which the valve opening Q (i) is changing, the follow-up completion determination is not performed and the operation is extended. Accordingly, it is possible to avoid erroneous follow-up completion determination during the opening / closing operation, and it is possible to more accurately check the opening / closing operation of the valve 21 even for the valve 21 having a slow valve operation. Thereby, the work and time required for the operation check of the valve 21 can be greatly reduced, and the management / maintenance cost can be reduced.

  If the completion of following the valve opening Q (i) with respect to the command value Qs cannot be confirmed after the end of the transient state and the stable state are confirmed, it is determined that the opening / closing operation of the valve 21 is abnormal. . As a result, the operation check is automatically ended, and it is possible to appropriately cope with the case where the tracking completion is not confirmed due to the malfunction of the valve 21.

  In the present embodiment, the transient state confirmation unit 17 may determine that the opening / closing operation of the valve 21 is abnormal when the end of the transient state cannot be confirmed within the transient limit period tc. Accordingly, the operation check is automatically ended, and it is possible to appropriately cope with the case where the transient state is not confirmed due to the malfunction of the valve 21.

  In the present embodiment, the stable state confirmation unit 18 may extend the determination period tj to the stability limit period ts when the stable state cannot be confirmed within the determination period tj. As a result, if the valve opening degree Q (i) is not stable after the transient state is confirmed, the follow-up completion determination is not performed and the extension is extended. Accordingly, it is possible to avoid erroneous follow-up completion determination during the opening / closing operation, and it is possible to more accurately check the opening / closing operation of the valve 21 even for the valve 21 having a slow valve operation.

  Further, in the present embodiment, the stable state confirmation unit 18 may determine that the opening / closing operation of the valve 21 is abnormal when the end of the transient state cannot be confirmed within the stability limit period ts. Accordingly, the operation check is automatically terminated, and it is possible to appropriately cope with the case where the stable state is not confirmed due to the malfunction of the valve 21.

[Second Embodiment]
Next, the valve operation check device 10 according to the second embodiment of the present invention will be described. In the first embodiment, the case where both the confirmation of the transient state and the confirmation of the stable state are performed has been described as an example. In the present embodiment, a case will be described in which confirmation of a transient state is performed without confirmation of a stable state.

FIG. 4 is a flowchart showing a valve operation check process according to the second embodiment, and the same or equivalent parts as those in FIG.
In FIG. 4, steps 110 and 111 in FIG. 2 are omitted. Therefore, when it is confirmed in step 105 that the transient state has ended without being in a transient state (step 105: NO), the process proceeds to step 120, and the tracking completion determination by the operation determination unit 19 is performed.
In step 120, when the completion of following cannot be confirmed (step 120: NO), the routine proceeds to step 112, where it is determined that the opening / closing operation of the valve 21 is abnormal.

[Effect of the second embodiment]
As described above, in this embodiment, since the confirmation of the stable state is omitted and only the transient state is confirmed, the normal / abnormality of the opening / closing operation of the valve 21 can be determined by a simple process, and the stable state is confirmed. The time required for checking the status can be shortened.

[Extended embodiment]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. In addition, each embodiment can be implemented in any combination within a consistent range.

  DESCRIPTION OF SYMBOLS 10 ... Valve operation check apparatus, 11 ... Communication I / F part, 12 ... Operation input part, 13 ... Screen display part, 14 ... Memory | storage part, 15 ... Instruction value setting part, 16 ... Opening degree acquisition part, 17 ... Transient state Check unit, 18 ... Stable state check unit, 19 ... Operation determination unit, 20 ... Field device, 21 ... Valve, 22 ... Flow meter, 23 ... Thermometer, 30 ... Upper device, L1 ... Communication line, L2 ... Transmission line, 50, 51, 52, 53 ... characteristics, Qs ... indicated value, Q (i) ... valve opening, ΔQ (i) ... change amount, Q '(i) ... moving average, ε (i) ... allowable range, Qsp ... follow-up completion range, tw ... standby period, tj ... determination period, N ... opening acquisition count, Np ... specified count, Nc ... transient limit count, tc ... transient limit period, Ns ... stability limit count, ts ... stability limit period .

Claims (7)

An instruction value setting unit for setting an instruction value indicating a target valve opening with respect to a valve to be checked;
In the determination period after setting the indicated value, an opening degree obtaining unit for periodically obtaining the valve opening degree from the valve;
It is confirmed whether or not the valve opening is in a transient state changing toward the indicated value, and if the end of the transient state cannot be confirmed within the determination period, the determination period is set as a transient limit period. A transient state confirmation part extending to
After confirming the end of the transient state, a stable state confirmation unit for confirming whether or not the value of the valve opening is stable,
An operation determining unit that determines whether the opening / closing operation of the valve is normal or abnormal by comparing the valve opening and the indicated value after the end of the transient state is confirmed. Operation check device. In the valve operation check device according to claim 1,
The transient state confirmation unit determines that the opening / closing operation of the valve is abnormal when the end of the transient state cannot be confirmed within the transient limit period. In the valve operation check device according to claim 1 or 2,
The said stable state confirmation part extends the said determination period to a stability limit period, when the said stable state cannot be confirmed within the said determination period, The valve operation check apparatus characterized by the above-mentioned. In the valve operation check device according to claim 3,
The valve operation check device, wherein the stable state confirmation unit determines that the opening / closing operation of the valve is abnormal when the end of the transient state cannot be confirmed within the stability limit period. An instruction value setting unit for setting an instruction value indicating a target valve opening with respect to a valve to be checked;
In the determination period after setting the indicated value, an opening degree obtaining unit for periodically obtaining the valve opening degree from the valve;
A transient state confirmation unit for confirming whether or not the valve opening is in a transient state changing toward the indicated value;
An operation determining unit that determines whether the opening / closing operation of the valve is normal or abnormal by comparing the valve opening and the indicated value after the end of the transient state is confirmed. Operation check device. An instruction value setting step for setting an instruction value indicating a target valve opening degree with respect to a valve to be checked;
In a determination period after setting the indicated value, an opening degree obtaining step for periodically obtaining the valve opening degree from the valve;
It is confirmed whether or not the valve opening is in a transient state changing toward the indicated value, and if the end of the transient state cannot be confirmed within the determination period, the determination period is set as a transient limit period. A transient state confirmation step extending to
After confirming the end of the transient state, a stable state confirmation step for confirming whether or not the value of the valve opening is in a stable state;
An operation determining step for determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening and the indicated value after the end of the transient state is confirmed. Operation check method. An instruction value setting step for setting an instruction value indicating a target valve opening degree with respect to a valve to be checked;
In a determination period after setting the indicated value, an opening degree obtaining step for periodically obtaining the valve opening degree from the valve;
A transient state confirmation step for confirming whether or not the valve opening is in a transient state changing toward the indicated value;
An operation determining step for determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening and the indicated value after the end of the transient state is confirmed. Operation check method.

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