JP2017126249A - Valve operation checking device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To check opening and closing operations of a valve with a small data communication volume.SOLUTION: A stand-by time calculation unit 15 calculates, as a stand-by time tw, a required arrival time tj that is acquired by dividing an indication value Qs, indicating a valve opening degree as a target, by a stroke speed Vs that is preset for a valve 21 to be checked. An acquisition control unit 18 stops the acquisition of the valve opening degree for only the tw after the setting of the Qs for the valve 21, calculates, as an adjustment time Tc, a required remaining time tr, which corresponds to a remaining stroke Qr from a valve opening degree Qw to the Qs that is acquired at a stand-by end time point Tw, acquired by division of the Qr by the Vs, and stops the acquisition of the valve opening degree from the Tw to an operation determination time point Tj when the tc has elapsed. 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) acquired at the Tj and the 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. 8 is an explanatory diagram showing a conventional valve operation check operation example.
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 Sj, 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 Sj 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 Qsj 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. If Sj is extended to the limit period Sj ′ and the stable state is reached within the limit period Sj ′, the follow-up completion determination is performed, and if the stable state is not reached within the limit period Sj ′, the valve is Is determined to be abnormal. As a result, as shown in the characteristic A, it is possible to check the operation of a valve whose valve opening Q reaches the command value Qs after the limit period Sj has elapsed.

Here, the valve requires a certain amount of time until the valve opening degree completes following the indicated value, and the confirmation of the stable state may be confirmed after this time has elapsed. There is no need to obtain the opening.
However, according to such a conventional technique, the waiting period has a fixed length, and is set in accordance with, for example, the valve having the shortest required time. Therefore, after the waiting period has elapsed, a fixed acquisition is performed from the beginning of the determination period. The valve opening is sequentially acquired from the valve at intervals.

  For this reason, data communication accompanying the acquisition of the valve opening by the valve operation check device is sequentially performed, which causes an increase in the amount of data communication in the corresponding communication path and relay device. For this reason, there is a problem in that the communication bandwidth is wasted, which may affect the processing operation of another data communication using the same communication path or a relay device located on the communication path.

  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 capable of checking the opening / closing operation of a valve with a small amount of data communication.

  In order to achieve such an object, the valve operation check device according to the present invention is obtained by dividing an instruction value indicating a target valve opening by a stroke speed preset for a valve to be checked. A standby time calculation unit that calculates the required arrival time as a standby time, and stops obtaining the valve opening from the valve for the standby time after setting the indicated value for the valve, and the standby ends The remaining required time corresponding to the remaining stroke obtained by dividing the remaining stroke from the valve opening obtained from the valve at the time point to the indicated value by the stroke speed is calculated as the adjustment time, and the standby An acquisition control unit for stopping acquisition of the valve opening from the valve from the end point to the operation determination point when the adjustment time has elapsed; and the operation determination point By comparing the instruction value and the valve opening degree obtained from the valve, and a motion determination section determines the normality / abnormality of the opening and closing operation of the valve.

  Also, in one configuration example of the valve operation check device according to the present invention, the standby time calculation unit calculates a time obtained by subtracting a predetermined correction time from the required arrival time as the standby time.

  Further, in one configuration example of the valve operation check device according to the present invention, when the acquisition control unit has a ratio of the remaining stroke with respect to the indicated value larger than a ratio of the correction time with respect to the required time, the remaining The remaining remaining required time obtained by extending the required time by a predetermined extended time is used as the adjustment time.

  Further, in one configuration example of the valve operation check device according to the present invention, the acquisition control unit includes the valve opening at the end of the standby time within an allowable range set in advance with respect to the instruction value. The adjustment time is set to zero.

  In addition, another valve operation check device according to the present invention provides a time required for arrival obtained by dividing a stroke speed set in advance for a valve to be checked by an instruction value indicating a target valve opening. A standby time calculation unit that calculates the standby time, an acquisition control unit that stops acquisition of the valve opening from the valve for the standby time after setting the instruction value for the valve, and the standby time An operation determining unit that determines normality / abnormality of the opening / closing operation of the valve by comparing the valve opening degree acquired from the valve with the indicated value according to progress.

  In addition, another valve operation check device according to the present invention sets a command value indicating a target valve opening degree for a valve to be checked from the valve for a preset standby time. Obtained by dividing the remaining stroke from the valve opening obtained from the valve at the end of standby to the indicated value by the stroke speed set in advance for the valve, An acquisition control unit that calculates the remaining required time corresponding to the remaining stroke as an adjustment time, and stops acquisition of the valve opening from the valve from the standby end time to the operation determination time when the adjustment time has elapsed; By comparing the valve opening obtained from the valve at the time of the operation determination with the indicated value, the normal / abnormal operation of the valve opening / closing operation is determined. And a motion determination section that.

  Further, the valve operation check method according to the present invention is based on the required arrival time obtained by dividing the indicated value indicating the target valve opening at the stroke speed set in advance for the valve to be checked. A standby time calculating step for calculating the valve, and the valve opening obtained from the valve is stopped at the end of standby after the standby value is set for the valve, and the valve opening from the valve is stopped during the standby time. The remaining required time corresponding to the remaining stroke obtained by dividing the remaining stroke from the opening to the indicated value by the stroke speed is calculated as an adjustment time, and the adjustment time has elapsed since the standby end time. An acquisition control step for stopping acquisition of the valve opening from the valve until the operation determination time, and the valve at the operation determination time By comparing the obtained and the valve opening and the instruction value, and a motion determination step of determining normality / abnormality of the opening and closing operation of the valve.

  Further, according to another valve operation check method of the present invention, an arrival time obtained by dividing a stroke speed set in advance for a valve to be checked by an instruction value indicating a target valve opening is obtained. A standby time calculating step for calculating as a standby time, an acquisition control step for stopping acquisition of the valve opening from the valve for the standby time after setting the indicated value for the valve, and for the standby time An operation determining step of determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening degree acquired from the valve with the indicated value according to progress.

  Further, according to another valve operation check method of the present invention, for a valve to be checked, an instruction value indicating a target valve opening is set for the valve to be checked from the valve for a preset standby time. Obtained by dividing the remaining stroke from the valve opening obtained from the valve at the end of standby to the indicated value by the stroke speed set in advance for the valve, An acquisition control step of calculating a remaining required time corresponding to the remaining stroke as an adjustment time, and stopping acquisition of the valve opening from the valve until the operation determination time when the adjustment time has elapsed from the standby end time; By comparing the valve opening obtained from the valve at the time of the operation determination with the indicated value, the normal / different operation of the valve is determined. And a motion determination step of determining.

  According to the present invention, after the instruction value indicating the target valve opening is set for the valve to be checked, it is acquired from the valve until the normality / abnormality determination of the valve opening / closing operation is started. The number of valve opening acquisition times can be greatly reduced. This makes it possible to check the opening / closing operation of the valve with a small amount of data communication, suppress unnecessary consumption of the communication band due to data communication associated with the acquisition of the valve opening, and other data communication or communication path using the same communication path It is possible to greatly reduce the influence on the processing operation of the relay device located in the position.

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 calculation method of waiting time. It is explanatory drawing which shows the valve operation check operation example concerning 1st Embodiment. It is explanatory drawing which shows the other valve operation check operation example concerning 1st Embodiment. It is a flowchart which shows the valve operation check process concerning 2nd Embodiment. It is a flowchart which shows the valve operation check process concerning 3rd 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 is composed of an information processing device such as a personal computer, a server device, and 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. 20 has a function of checking the operation of the valve 21, which is one of 20.

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 device 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, a standby time calculation unit 15, an instruction value setting unit 16, an opening degree acquisition. A unit 17, an acquisition control 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 standby time calculation unit 15 obtains the required time tj = Qs / Vs obtained by dividing the instruction value Qs indicating the target valve opening by the stroke speed Vs set in advance for the valve 21 to be checked. From this, a time obtained by subtracting the predetermined correction time tx is calculated as a standby time tw = tj−tx.
At this time, the stroke speed Vs may be acquired in advance in the storage unit 14 or the external device in accordance with the data sheet and specifications of the valve 21.

The instruction value setting unit 16 has a function of setting an instruction value Qs indicating a target valve opening degree to the valve 21 to be checked via the communication I / F unit 11.
The opening acquisition unit 17 has a function of acquiring the valve opening Q from the valve 21 to be checked via the communication I / F unit 11.

  The acquisition control unit 18 sets the instruction value Qs for the valve 21 and stops the acquisition of the valve opening Q by the opening acquisition unit 17 for the standby time tw, and from the valve 21 at the standby end time Tw. The remaining required time tr = Qr / Vs corresponding to the remaining stroke Qr obtained by dividing the remaining stroke Qr = Qs−Qw from the acquired valve opening Qw to the command value Qs by the stroke speed Vs is adjusted time. and a function of calculating as tc = tr and a function of stopping the acquisition of the valve opening Q by the opening acquiring unit 17 from the standby end time Tw to the operation determination time Tj = Tw + tc when the adjustment time tc has elapsed. .

  Further, when the ratio Pr = Qr / Qs of the remaining stroke Qr with respect to the instruction value Qs is larger than the ratio Px = tx / tj of the correction time tx with respect to the required time tj, the acquisition control unit 18 sets the remaining required time tr to a predetermined value. A function in which the remaining remaining required time tr ′ extended by the extension time ty is used as the adjustment time tc, and the allowable range Qsw = Qs ± β in which the valve opening Qw at the standby end time Tw is preset with respect to the instruction value Qs. Is included, it has a function of setting the adjustment time tc to zero.

  The operation determination unit 19 compares the follow-up completion range Qsj = Qs ± α consisting of the instruction value Qs and the allowable error α of Qs with the latest valve opening Q (i) acquired last at the operation determination time Tj. Thus, 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 opening and closing operation of the valve are confirmed when the follow-up completion state is confirmed. It has a function to determine that it is normal.

[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 standby time calculation unit 15 obtains the required time tj = Qs obtained by dividing the instruction value Qs indicating the target valve opening by the stroke speed Vs set in advance for the valve 21 to be checked. A time obtained by subtracting a predetermined correction time tx from / Vs is calculated as a standby time tw = tj−tx (step 100).

FIG. 3 is an explanatory diagram showing a method of calculating the standby time. The stroke speed Vs is defined in advance as a stroke ΔQ indicating a change amount in which the valve opening Q changes in an arbitrary time length Δt due to the opening / closing operation of the valve 21.
Therefore, by dividing Qs by Vs, it is possible to obtain the required time tj for the valve opening Q to reach Qs.

  Further, the correction time tx is a time for defining the timing for adjusting the time before waiting until Q reaches Qs, and tx may be a predetermined constant value, You may calculate by a fixed ratio. By correcting tj with this tx, the time adjustment can be executed earlier, and when the actual stroke speed is faster than the calculated stroke speed Vs, the time required for the entire operation check can be shortened as a result.

  Next, the instruction value setting unit 16 sets the instruction value Qs indicating the target valve opening degree to the valve 21 to be checked via the communication I / F unit 11 (step 101), and the acquisition control unit 18 Waits for the waiting time tw after setting the instruction value Qs for the valve 21, stops the acquisition of the valve opening Q by the opening acquiring unit 17 (step 102), and waits for the waiting time tw to elapse At the end time Tw, the opening degree obtaining unit 17 obtains the valve opening degree Qw from the valve 21 (step 103).

Subsequently, the acquisition control unit 18 compares the permissible range Qsw = Qs ± β consisting of the instruction value Qs and the preset permissible error β with the valve opening Qw at the standby end time Tw (step 110).
Here, when the valve opening Qw is included in the allowable range Qsw (step 110: YES), the acquisition control unit 18 sets the adjustment time tc to zero (step 111), and proceeds to step 116 described later.

  On the other hand, when the valve opening Qw is not included in the allowable range Qsw (step 110: NO), the acquisition control unit 18 sets the remaining stroke Qr = Qs−Qw, which is the difference between the instruction value Qs and the valve opening Qw, The remaining required time tr corresponding to Qr is calculated by dividing by the stroke speed Vs (step 112). The ratio Pr = Qr / Qs of Qr with respect to Qs and the ratio Px = tx of the correction time tx with respect to the required required time tj / Tj is compared (step 113).

Here, when Pr is equal to or less than Px (step 113: YES), the acquisition control unit 18 sets the remaining required time tr as the adjustment time tc (step 114), and proceeds to step 116 described later.
On the other hand, if Pr is larger than Px (step 113: NO), the acquisition control unit 18 sets the remaining required time tr ′ = tr + ty obtained by extending the remaining required time tr by a preset extended time ty to the adjustment time tc. The setting is made (step 115), and the process proceeds to step 116 described later.

  After setting the adjustment time tc in this way, the acquisition control unit 18 stops the acquisition of the valve opening Q by the opening acquisition unit 17 for the adjustment time tc from the standby end time Tw (step 116).

  After that, the opening degree obtaining unit 17 performs the valve opening degree Q (i) (i = i) from the valve 21 at the obtaining interval td that is set in advance for the prescribed number Np at the operation determination time point Tj when the adjustment time tc has elapsed. 1, 2,..., Np) are acquired (step 120).

  In response to this, the operation determination unit 19 compares the follow-up completion range Qsj = Qs ± α including the instruction value Qs and the preset allowable error α with these valve opening degrees Q (i), It is confirmed 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 (step 121).

  Here, when the valve opening Q (i) is included in the follow-up completion range Qsj and the follow-up completion is confirmed (step 121: 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 122), and the series of valve operation check processes is terminated.

  On the other hand, when the valve opening degree Q (i) is not included in the follow-up completion range Qsj and the follow-up completion cannot be confirmed (step 121: NO), the operation determination unit 19 determines the valve 21 to be checked. It is determined that the opening / closing operation is abnormal, the determination / diagnosis result is displayed on the screen display unit 13 (step 123), and the series of valve operation check processing is terminated.

[Operation example]
Next, an operation example of the valve operation check device 10 according to the present embodiment will be described with reference to FIG. FIG. 4 is an explanatory diagram illustrating an example of a valve operation check operation according to the first embodiment. Here, a case where the actual stroke speed is faster than the calculated stroke speed Vs will be described as an example. In FIG. 4, a characteristic A0 is a stroke characteristic specified by the stroke speed Vs, and a characteristic A1 is a stroke characteristic specified by an actual stroke speed faster than the stroke speed Vs.

  The instruction value Qs is set for the valve 21 to be checked at time T0, and a waiting time tw = tj−tx, which is a time obtained by subtracting a predetermined correction time tx from the required time tj = Qs / Vs, elapses. Until then, the acquisition of the valve opening Q is stopped. Thereafter, the valve opening Qw is acquired for the first time at the standby end time Tw, and the valve opening Qw is not included in the allowable range Qsw = Qs ± β, so the remaining stroke Qr = Qs−Qw is divided by the stroke speed Vs. The remaining required time tr = Qr / Vs is calculated.

Here, since the ratio Pr = Qr / Qs is equal to or less than the ratio Px = tx / tj, the remaining required time tr is set as the adjustment time tc. Accordingly, the acquisition of the valve opening Q is stopped until tc (= tr) has elapsed from the standby end time Tw.
Thereafter, at the operation determination time point Tj when the adjustment time tc has elapsed, a new valve opening Q (i) is acquired at the acquisition interval td for the specified number of times Np, here Np = 3 times, and the tracking completion range Qsj = Qs ± A follow-up completion determination is made by comparing with α.

  Therefore, in this example, since the adjustment time tc consisting of the remaining required time tr is set at the standby end time Tw, the scheduled motion determination time Tj0 specified from the stroke speed Vs and the set value Qs becomes the motion determination time Tj. It has been expedited. As a result, the time required for the entire operation check is shortened according to the actual stroke speed.

  Next, another example of the operation of the valve operation check device 10 according to the present embodiment will be described with reference to FIG. FIG. 5 is an explanatory diagram illustrating another example of the valve operation check operation according to the first embodiment. Here, a case where the actual stroke speed is slower than the calculated stroke speed Vs will be described as an example. In FIG. 5, a characteristic A0 is a stroke characteristic specified by the stroke speed Vs, and a characteristic A2 is a stroke characteristic specified by an actual stroke speed slower than the stroke speed Vs.

  The instruction value Qs is set for the valve 21 to be checked at time T0, and a waiting time tw = tj−tx, which is a time obtained by subtracting a predetermined correction time tx from the required time tj = Qs / Vs, elapses. Until then, the acquisition of the valve opening Q is stopped. Thereafter, the valve opening Qw is acquired for the first time at the standby end time Tw, and the valve opening Qw is not included in the allowable range Qsw = Qs ± β, so the remaining stroke Qr = Qs−Qw is divided by the stroke speed Vs. The remaining required time tr = Qr / Vs is calculated.

Here, since the ratio Pr = Qr / Qs is larger than the ratio Px = tx / tj, the remaining remaining required time tr ′ = tr + ty obtained by extending the remaining required time tr by the extension time ty is set as the adjustment time tc. Accordingly, the acquisition of the valve opening Q is stopped until tc (= tr) has elapsed from the standby end time Tw.
Thereafter, at the operation determination time point Tj when the adjustment time tc has elapsed, a new valve opening Q (i) is acquired at the acquisition interval td for the specified number of times Np, here Np = 3 times, and the tracking completion range Qsj = Qs ± A follow-up completion determination is made by comparing with α.

  Therefore, in this example, since the adjustment time tc consisting of the remaining required time tr + ty is set at the standby end time Tw, the scheduled motion determination time Tj0 specified from the stroke speed Vs and the set value Qs becomes the motion determination time Tj. It has been delayed. As a result, the time required for the entire operation check is extended according to the actual stroke speed.

[Effect of the first embodiment]
As described above, in the present embodiment, the standby time calculation unit 15 divides the instruction value Qs indicating the target valve opening by the stroke speed Vs set in advance for the valve 21 to be checked. The obtained arrival time tj is calculated as the standby time tw, and the acquisition control unit 18 stops acquiring the valve opening Q for the standby time tw after setting the instruction value Qs for the valve 21, and the standby end time The remaining required time tr corresponding to the remaining stroke Qr obtained by dividing the remaining stroke Qr from the valve opening Qw acquired at Tw to the command value Qs by the stroke speed Vs is calculated as the adjustment time Tc, and the standby The acquisition of the valve opening Q is stopped from the end time Tw to the operation determination time Tj when the adjustment time tc has elapsed, and the valve opening acquired by the operation determination unit 19 at the operation determination time Tj is stopped. By comparison with the indicated value Qs Q (i), it is obtained so as to judge the normality / abnormality of the opening and closing operation of the valve 21.

  Thereby, after setting the instruction value Qs, the acquisition of the valve opening Q is stopped until the required time tj estimated from the stroke speed Vs and the instruction value Qs elapses, and the stroke speed Vs from the standby end time Tw. The acquisition of the valve opening Q is stopped until an adjustment time tc consisting of the remaining required time tr estimated from the remaining stroke Qr elapses.

Therefore, as in the prior art, after setting the instruction value Qs, after the waiting time tw of a fixed value has elapsed, the valve opening Q is sequentially set from the valve 21 at regular intervals until the completion of the tracking completion determination process. Compared with the case where it acquires, the frequency | count of acquisition of the valve opening degree Q can be reduced significantly.
For this reason, the amount of data communication associated with the acquisition of the valve opening Q can be greatly reduced, and the opening / closing operation of the valve 21 can be checked with a small amount of data communication. As a result, an increase in the amount of data communication in the communication path or relay device used to acquire the valve opening Q can be suppressed, wasteful consumption of the communication band can be avoided, and other data communication and communication paths using the same communication path can be avoided. It is possible to reduce the possibility of affecting the processing operation of the relay device located above.

  In the present embodiment, the standby time calculation unit 15 may calculate the standby time tw by subtracting the predetermined correction time tx from the required travel time tj. Thereby, the time adjustment using the adjustment time tc can be executed early, and before the valve opening degree Q reaches the instruction value Qs, according to the difference between the preset stroke speed Vs and the actual stroke speed, The timing at which the follow-up completion determination is started can be matched with the arrival time at the instruction value Qs. Therefore, it is possible to accurately specify the period during which the acquisition of the valve opening Q is to be stopped, and the time required for the entire operation check can be shortened with the minimum number of acquisitions of the valve opening Q.

Further, in the present embodiment, when the ratio Pr of the remaining stroke Qr to the instruction value Qs is larger than the ratio Px of the correction time tx to the required time tj, the acquisition control unit 18 sets the remaining required time tr to a predetermined extension time. The remaining remaining required time tr ′ extended by ty may be used as the adjustment time tc.
As a result, when the actual stroke speed is slower than the preset stroke speed Vs and the arrival time to the instruction value Qs is later than the scheduled time, the adjustment time tc is extended, and as a result, the valve opening Q The period during which the acquisition is suspended will also be extended. Therefore, even when the actual stroke speed is low, the timing for starting the tracking completion determination can be delayed in accordance with the actual timing, and the tracking completion determination can be executed accurately.

  In the present embodiment, the acquisition control unit 18 sets the adjustment time Tc when the valve opening Qw at the standby end time Tw is included in the allowable range Qsw set in advance with respect to the instruction value Qs. It may be set to zero. Thereby, when Qw is a value close to Qs, it is possible to omit the processing required for calculating and waiting for the adjustment time tc, and as a result, the time required for the entire operation check can be shortened.

[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, as an example, both the adjustment of the waiting time tw according to the stroke speed Vs of the valve 21 to be checked and the adjustment of the follow-up completion determination execution timing according to the remaining stroke Qr are performed. explained. In the present embodiment, a case will be described in which only the standby time tw is adjusted according to the stroke speed Vs of the valve 21 to be checked.

FIG. 6 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. 6, steps 103 and 110 to 116 in FIG. 2 are omitted. Therefore, in step 102, after waiting for the standby time tw, the process proceeds to step 120, and the opening / closing operation determination by the operation determination unit 19 is performed.

[Effect of the second embodiment]
Thus, in this embodiment, the adjustment of the execution timing of the follow-up completion determination is omitted, and only the standby time tw is adjusted according to the stroke speed Vs. When the difference in actual stroke speed is small and the deviation in the execution timing of the follow-up completion determination is expected to be small, the number of acquisitions of the valve opening degree Q can be greatly reduced by simple processing.

[Third Embodiment]
Next, the valve operation check device 10 according to the second embodiment of the present invention will be described. In the first embodiment, as an example, both the adjustment of the waiting time tw according to the stroke speed Vs of the valve 21 to be checked and the adjustment of the follow-up completion determination execution timing according to the remaining stroke Qr are performed. explained. In the present embodiment, a case where only adjustment of the follow-up completion determination execution timing according to the remaining stroke Qr is performed will be described.

FIG. 7 is a flowchart showing a valve operation check process according to the third embodiment. The same reference numerals are given to the same or equivalent parts as those in FIG.
In FIG. 7, instead of step 100 in FIG. 2, a step 300 for setting a waiting time tw having a fixed time length is provided.

  That is, in accordance with the start of the valve operation check process, after the fixed time length is set to the standby time tw by the standby time calculation unit 15 (step 300), the process proceeds to step 101 and the instruction value setting unit 16 instructs The value Qs is set (step 101), and the acquisition control unit 18 waits for the standby time tw from the setting of the instruction value Qs, and stops the acquisition of the valve opening degree Q by the opening degree acquisition unit 17 (step 101). 102). Thereafter, at the standby end time Tw when the standby time tw has elapsed, the valve opening degree Qw is acquired from the valve 21 by the opening degree acquisition unit 17 (step 103), and thereafter the remaining stroke Qr by the acquisition control unit 18 is obtained. The follow-up completion determination execution timing is adjusted accordingly.

[Effect of the third embodiment]
As described above, the present embodiment omits the adjustment of the standby time tw according to the stroke speed Vs and only adjusts the execution timing of the follow-up completion determination. Even when there is a difference between the actual stroke speed, the number of valve opening acquisition times can be greatly reduced by simple processing.

[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 ... Standby time calculation part, 16 ... Instruction value setting part, 17 ... Opening degree Acquisition unit, 18 ... acquisition control unit, 19 ... operation determination unit, 20 ... field device, 21 ... valve, 22 ... flow meter, 23 ... thermometer, 30 ... host device, L1 ... communication line, L2 ... transmission line, A0 , A1, A2 ... characteristics, Vs ... stroke speed, Qs ... indicated value, Q, Qw, Q (i) ... valve opening, Qr ... remaining stroke, Pr, Px ... ratio, Qsw ... allowable range, Qsj ... follow-up completion Range, tj: arrival time, tx: correction time, tw ... standby time, tr ... remaining time, tc ... adjustment time, ty ... extension time, tr '... extension remaining time, Tw ... standby end time, Tj ... Operation determination time, Tj0 ... scheduled Operation determination time point, Np: prescribed number of times.

Claims (9)

A waiting time calculation unit that calculates a required time obtained by dividing an instruction value indicating a target valve opening at a stroke speed set in advance for a valve to be checked as a waiting time;
The acquisition of the valve opening from the valve is stopped only during the standby time after the instruction value is set for the valve, and the remaining from the valve opening acquired from the valve to the instruction value at the end of standby. The remaining required time corresponding to the remaining stroke obtained by dividing the stroke by the stroke speed is calculated as the adjustment time, and from the valve end until the operation determination time when the adjustment time has elapsed. An acquisition control unit for stopping acquisition of the valve opening of
An operation determining unit that determines normality / abnormality of the opening / closing operation of the valve by comparing the valve opening obtained from the valve with the indicated value at the time of the operation determination. Check device. In the valve operation check device according to claim 1,
The valve operation check device, wherein the waiting time calculation unit calculates a time obtained by subtracting a predetermined correction time from the required time to reach as the waiting time. In the valve operation check device according to claim 2,
When the ratio of the remaining stroke with respect to the indicated value is larger than the ratio of the correction time with respect to the required time, the acquisition control unit adjusts the remaining remaining required time obtained by extending the remaining required time by a predetermined extension time. Valve operation check device characterized by time. In the valve operation check device according to any one of claims 1 to 3,
The acquisition control unit sets the adjustment time to zero when the valve opening degree at the end of the standby time is included in an allowable range set in advance with respect to the instruction value. Operation check device. A standby time calculation unit that calculates a required travel time obtained by dividing a stroke speed set in advance for a valve to be checked by an instruction value indicating a target valve opening;
An acquisition control unit that stops acquisition of the valve opening from the valve for the waiting time after setting the instruction value for the valve;
An operation determination unit that determines normality / abnormality of the opening / closing operation of the valve by comparing the valve opening degree acquired from the valve with the instruction value as the standby time elapses. Valve operation check device. For the valve to be checked, acquisition of the valve opening from the valve is stopped for the preset standby time after setting the indicated value indicating the target valve opening, and at the end of standby. The remaining required time corresponding to the remaining stroke obtained by dividing the remaining stroke from the valve opening obtained from the valve to the indicated value by the stroke speed set in advance for the valve is used as the adjustment time. Calculating and stopping the acquisition of the valve opening from the valve from the end of standby until the operation determination time when the adjustment time has elapsed,
An operation determining unit that determines normality / abnormality of the opening / closing operation of the valve by comparing the valve opening obtained from the valve with the indicated value at the time of the operation determination. Check device. A standby time calculation step of calculating a required time obtained by dividing an instruction value indicating a target valve opening at a stroke speed set in advance for a valve to be checked as a standby time;
The acquisition of the valve opening from the valve is stopped only during the standby time after the instruction value is set for the valve, and the remaining from the valve opening acquired from the valve to the instruction value at the end of standby. The remaining required time corresponding to the remaining stroke obtained by dividing the stroke by the stroke speed is calculated as the adjustment time, and from the valve end until the operation determination time when the adjustment time has elapsed. An acquisition control step for stopping acquisition of the valve opening of
An operation determination step for determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening obtained from the valve with the indicated value at the time of the operation determination. Method for checking. A standby time calculation step of calculating a required travel time obtained by dividing a stroke speed set in advance for a valve to be checked by an instruction value indicating a target valve opening, as a standby time;
An acquisition control step of stopping acquisition of the valve opening from the valve for the waiting time after setting the instruction value for the valve;
An operation determining step of determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening obtained from the valve with the indicated value as the standby time elapses. The valve operation check method. For the valve to be checked, acquisition of the valve opening from the valve is stopped for the preset standby time after setting the indicated value indicating the target valve opening, and at the end of standby. The remaining required time corresponding to the remaining stroke obtained by dividing the remaining stroke from the valve opening obtained from the valve to the indicated value by the stroke speed set in advance for the valve is used as the adjustment time. An acquisition control step for calculating and stopping acquisition of the valve opening from the valve from the end of standby until the operation determination time when the adjustment time has elapsed;
An operation determination step for determining normality / abnormality of the opening / closing operation of the valve by comparing the valve opening obtained from the valve with the indicated value at the time of the operation determination. Method for checking.

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