JP2022162771A - Abnormality detection device, and abnormality detection method - Google Patents

Abstract

To properly detect abnormality in a bearing portion.SOLUTION: In a radial gate 10, a door body 2 and a driving portion 31 are connected by a wire rope 36. In the door body 2, a skin plate 21 and a bearing portion 23 are connected by a column base 24. An abnormality detection device 40 comprises: a load measuring portion 46 acquiring values indicating a load applied on the wire rope 36 as a load estimation value; an angle meter 47 acquiring an angle of the column base 24 at a prescribed position as a column base angle; and a determination portion determining presence/absence of abnormality in the bearing portion 23 based on a relationship between the load estimation value and the column base angle when operating the radial gate 10. Thus, abnormality in the bearing portion 23 can be properly detected.SELECTED DRAWING: Figure 1

Description

The present invention relates to an abnormality detection device and an abnormality detection method.

Conventionally, radial gates have been used in dams and the like. In the radial gate body, the skin plate and the support are connected by pedestals. The frictional forces between the trunnion pin and the trunnion hub at the bearing greatly affect the structural integrity of the radial gate. If there is an abnormality in the bearing, a large bending moment acts on the pedestal when opening and closing the radial gate, which may lead to buckling and plastic yielding of the pedestal. However, since the inside of the bearing is not directly visible, it is difficult to detect anomalies.

Therefore, in Patent Document 1, an AE sensor is attached to a gate pin (radial gate support member), and a predetermined DA value obtained based on an AE waveform acquired from the AE sensor is used to evaluate the frictional force of the gate pin. disclosed. Patent Document 2 discloses a method of measuring the amount of displacement of a supporting steel material that presses a trunnion girder against a concrete pier in a radial gate, and detecting the support state of the radial gate from the change in the amount of displacement.

JP 2019-113453 A Japanese Patent No. 2888806

By the way, even when an AE sensor is used as in Patent Document 1, it is not easy to appropriately detect an abnormality in the support.

SUMMARY OF THE INVENTION An object of the present invention is to appropriately detect an abnormality in a bearing portion.

According to a first aspect of the present invention, there is provided an abnormality detection device for detecting an abnormality in a radial gate, wherein the radial gate has a door body and a drive section connected by a connecting medium, and the door body has a skin plate and a bearing section. a load measuring unit that is connected by a pedestal and acquires a value indicating the load applied to the coupling medium or the pedestal as a load evaluation value; an angle meter that acquires an angle at a predetermined position of the pedestal as a pedestal angle; a determination unit that determines whether or not there is an abnormality in the support based on the relationship between the load evaluation value and the pedestal angle during operation of the radial gate.

The invention according to claim 2 is the abnormality detection device according to claim 1, wherein the determination unit identifies when the door body is started from a change in the angle of the pedestal, and detects the load at the time of the start. Based on the evaluation value or the representative value of the load evaluation values during movement of the door body, it is determined whether or not there is an abnormality in the support portion.

The invention according to claim 3 is the abnormality detection device according to claim 2, wherein the determination unit determines the load evaluation value at the start of the door body or the door load value at each operation of the radial gate. A representative value of the load evaluation value during the movement of the body is stored, and an abnormality in the bearing portion is determined based on the change over time of the load evaluation value at the time of starting or the change over time of the representative value of the load evaluation value. Determine presence/absence.

The invention according to claim 4 is the abnormality detection device according to any one of claims 1 to 3, wherein the determination unit identifies the start time of the door body from the change in the angle of the pedestal. and determining whether or not there is an abnormality in the support portion based on the variation of the load evaluation value during movement of the door body.

The invention according to claim 5 is the abnormality detection device according to any one of claims 1 to 4, wherein the door body has a connecting medium, a support portion and a pedestal on each of the left bank side and the right bank side. wherein the load evaluation value of the connecting medium or the pedestal on the left bank side is obtained by the load measuring unit, and the load evaluation value of the connecting medium or the pedestal on the right bank side is obtained by another load measuring unit. The pedestal angle of the pedestal on the left bank side is obtained by the goniometer, the pedestal angle of the pedestal on the right bank side is obtained by another goniometer, and the determining unit obtains the left bank The presence or absence of an abnormality is individually determined for the support portion on the bank side and the support portion on the right bank side.

According to a sixth aspect of the present invention, there is provided an anomaly detection device for detecting an anomaly in a radial gate, wherein a skin plate and a bearing portion are connected by pedestals in the door body of the radial gate, A first goniometer that acquires the angle of the pedestal as a first pedestal angle, a second goniometer that acquires the angle of the pedestal in the vicinity of the skin plate as a second pedestal angle, and the radial gate. a determination unit that determines whether or not there is an abnormality in the support portion during driving based on a pedestal evaluation value that indicates the difference or ratio between the first pedestal angle and the second pedestal angle.

The invention according to claim 7 is the abnormality detection device according to claim 6, wherein the determination unit determines the pedestal evaluation value when the door body is started or the pedestal evaluation value when the door body is moving. Based on the representative value of the pedestal evaluation value, the presence or absence of an abnormality in the support portion is determined.

The invention according to claim 8 is the abnormality detection device according to claim 7, wherein the determination unit determines the pedestal evaluation value or the A representative value of the pedestal evaluation value during the movement of the door body is stored, and based on the temporal change of the pedestal evaluation value at the start or the temporal change of the representative pedestal evaluation value, the support is stored. Determines whether there is an abnormality in the part.

The invention according to claim 9 is the abnormality detection device according to any one of claims 6 to 8, wherein the determination unit determines a to determine whether or not there is an abnormality in the support portion.

The invention according to claim 10 is the abnormality detection device according to any one of claims 6 to 9, wherein the door body is provided with a support portion and a pedestal on each of the left bank side and the right bank side. a first pedestal angle and a second pedestal angle of the pedestal on the left bank side are obtained by the first goniometer and the second goniometer, respectively, and the first pedestal angle of the pedestal on the right bank side is obtained An angle and a second pedestal angle are obtained by another first goniometer and another second goniometer, respectively, and the judging unit determines the bearing part on the left bank side and the bearing part on the right bank side. to determine the presence or absence of anomalies individually.

According to an eleventh aspect of the invention, there is provided an abnormality detection method for detecting an abnormality in a radial gate. A step of acquiring a value indicating a load applied to the connecting medium or the pedestal connected by the pedestal as a load evaluation value, a step of acquiring an angle of a predetermined position of the pedestal as a pedestal angle, and the radial gate. and determining whether or not there is an abnormality in the support portion based on the relationship between the load evaluation value and the pedestal angle during operation.

According to a twelfth aspect of the invention, there is provided an abnormality detection method for detecting an abnormality in a radial gate, wherein a skin plate and a bearing portion are connected by a pedestal in a door body of the radial gate, obtaining the angle of the pedestal as a first pedestal angle; obtaining the angle of the pedestal in the vicinity of the skin plate as a second pedestal angle; determining whether or not there is an abnormality in the support portion based on a pedestal evaluation value that indicates the difference or ratio between the first pedestal angle and the second pedestal angle.

ADVANTAGE OF THE INVENTION According to this invention, the abnormality in a bearing part can be detected appropriately.

It is a figure which shows the structure of the water gate system which concerns on 1st Embodiment. It is a top view which shows a plate support part. It is a block diagram which shows the structure of an abnormality detection apparatus. FIG. 5 is a diagram showing the flow of processing for detecting an abnormality in a radial gate; It is a figure which shows the load evaluation value in a normal state, and the change of a pedestal angle. FIG. 10 is a diagram showing bending of the pedestal in a normal state; It is a figure which shows the load evaluation value and the change of a pedestal angle in the state of sticking abnormality and sliding abnormality. FIG. 11 illustrates the bending of the pedestal in a jamming condition; It is a figure which shows the relationship between the load evaluation value and a pedestal angle in the state of specific angle abnormality. FIG. 4 is a diagram showing changes over time in load evaluation values at startup; FIG. 11 is a block diagram showing the configuration of an abnormality detection device according to a second embodiment; FIG. FIG. 5 is a diagram showing the flow of processing for detecting an abnormality in a radial gate; FIG. 10 is a diagram showing changes in the first pedestal angle and the second pedestal angle in a normal state; FIG. 10 is a diagram showing changes in the first pedestal angle and the second pedestal angle in states of sticking abnormality and sliding abnormality; It is a figure which shows the relationship between a pedestal evaluation value and a 1st pedestal angle in the state of specific angle abnormality. FIG. 10 is a diagram showing changes over time in pedestal evaluation values at startup; FIG. 10 is a diagram showing changes over time in the maximum strain of the pedestal;

FIG. 1 is a diagram showing the configuration of a water gate system 1 according to the first embodiment of the present invention. The floodgate system 1 includes a radial gate 10 that is a floodgate and a computer 4 . The radial gate 10 of FIG. 1 is installed in a dam, and the computer 4 is installed, for example, in a building adjacent to the dam. The radial gate 10 may be provided in facilities other than dams (for example, embankments, etc.). Also, the computer 4 may be provided at a position far away from the radial gate 10 . In this case, various measurement units attached to the radial gate 10 are connected to a communication device or the like, and can communicate with the computer 4 via a network such as the Internet. The computer 4 may be a computer provided by a cloud service.

The radial gate 10 includes a door 2 and an opening/closing device 3 . The gate 2 is installed in an opening 91 provided in the bank of the dam and used to adjust the flow of water in the opening 91 . The door 2 is made of metal, for example. The door 2 has a skin plate 21 and two plate supports 22 . The skin plate 21 is a plate-like member substantially parallel to the rotation axis J1 in FIG. The cross-sectional shape of the skin plate 21 perpendicular to the rotation axis J1 is substantially arcuate with a predetermined radius centered on the rotation axis J1. The skin plate 21 is provided across two side surfaces 911 (hereinafter referred to as "opening side surfaces 911") of the opening 91 substantially perpendicular to the rotation axis J1.

FIG. 2 is a plan view showing the plate support portion 22, and FIG. 2 shows a cross section of the skin plate 21 at the position of the girder 25 described later (a cross section along a plane including the rotation axis J1). As shown in FIG. 2 , the two plate support portions 22 are spaced apart in the direction of the rotation axis J<b>1 and arranged near the two opening side surfaces 911 . In the door body 2, the plate support part 22 is provided in each of the left bank side and the right bank side.

As shown in FIGS. 1 and 2, each plate support 22 comprises a bearing 23 and a plurality of pedestals 24 . The support portion 23 is a rotating portion of the door 2, and typically includes a trunnion hub 231 and a trunnion pin 232, as shown in FIG. The trunnion pin 232 is fixed to the dam body (eg, open side 911) of the dam. The trunnion hub 231 is a cylindrical member and is fitted to the trunnion pin 232 via a radial bearing. The trunnion hub 231 is rotatably supported by a trunnion pin 232 about the rotation axis J1. The rotation axis J1 coincides with the center of the trunnion pin 232 . A thrust bearing may be further provided for the trunnion hub 231 in the bearing portion 23 . Depending on the design of bearing 23 , trunnion hub 231 may be fixed to the bank and trunnion pin 232 may be rotatably supported by trunnion hub 231 . That is, the rotating body in the bearing portion 23 may be either the trunnion hub 231 or the trunnion pin 232 .

The plurality of pedestals 24 are elongated members extending from the rotating body (here, the trunnion hub 231 ) of the bearing portion 23 toward the skin plate 21 . Typically, each plate support 22 has two pedestals 24 . The two pedestals 24 form an acute angle and are fixed to the rotating body of the support 23 . Each pedestal 24 is, for example, H-shaped steel, I-shaped steel, or the like. Two girders 25 are provided on the surface of the skin plate 21 on the bearing portion 23 side. Each girder 25 is a long member substantially parallel to the rotation axis J1. The ends of the two pedestals 24 on the side opposite to the bearing portion 23 are fixed to the two girders 25, respectively. In the door body 2 , the skin plate 21 and the support portion 23 are connected by the girder 25 and the pedestal 24 . Depending on the design of the door 2 , the pedestal 24 may be directly connected to the skin plate 21 .

Each plate support 22 is further provided with a sheave 26 . The pulley 26 is a movable pulley that moves (rotates) together with the door 2 . In the example of FIG. 1, the pulley 26 is arranged near the lower girder 25 . The number and positions of the pulleys 26 may be changed as appropriate. In the door 2, reinforcing members may be appropriately provided between the two pedestals 24 of each plate support portion 22, on the surface of the skin plate 21 on the support portion 23 side, or the like.

A side portion 211 of the skin plate 21 facing each opening side 911 has a surface substantially parallel to the opening side 911 . The side portion 211 is provided with watertight rubber (not shown). The side portion 211 contacts the opening side surface 911, which is a doorstop, via watertight rubber. Each side portion 211 of the skin plate 21 is preferably provided with a side roller (not shown) that rolls on the opening side surface 911 . As a result, the door body 2 can be smoothly rotated around the rotation axis J1. The skin plate 21 is also provided with watertight rubber at the bottom end 213 . In the state indicated by the solid line in FIG. 1 (hereinafter referred to as "fully closed state"), the lower end portion 213 contacts the bottom surface 912 of the opening 91, which is the door stop, via the watertight rubber. In addition, when the radial gate 10 is provided in the middle of the dam, watertight rubber is also provided on the upper end of the skin plate 21 .

The opening/closing device 3 is, for example, a wire rope winch type, and rotates the door 2 to open and close the door 2 (open and close the opening 91). The opening/closing device 3 includes, for example, a driving portion 31 and two metal wire ropes 36 . The drive unit 31 has two drums 311 . The two drums 311 are arranged above the two opening sides 911 respectively. A portion of the wire rope 36 is wound around each drum 311, as will be described later. The radial gate 10 is provided with drums 311 and wire ropes 36 on the left bank side and the right bank side, respectively. In FIG. 1, only one drum 311 and one wire rope 36 are shown. The number of drums 311 and wire ropes 36 may be changed arbitrarily.

The two drums 311 are connected via gears or the like to a shaft (not shown) extending in the direction of the rotation axis J1. The shaft is connected to an electric motor via a reduction gear or the like. In the drive unit 31, the two drums 311 rotate in the same direction by rotating the shafts of the electric motors. The drive unit 31 can switch the rotation direction of the drum 311 between forward rotation and reverse rotation.

One end of a wire rope 36 as a coupling medium is fixed to each drum 311 and a part of the wire rope 36 is wound around the drum 311 . A portion of each wire rope 36 that is not wound around the drum 311 is hung on the pulley 26 of the plate support portion 22 . The other end of the wire rope 36 is held in the vicinity of the drum 311 by a load measuring section 46 which will be described later. The load measuring unit 46 is fixed to the bank. In the radial gate 10 , the wire rope 36 connects the door 2 and the driving portion 31 . In the opening/closing device 3, a rope other than the wire rope 36, or another cord-like member such as a chain may be used as the coupling medium.

In the opening/closing device 3, the normal rotation of the drum 311 causes the wire rope 36 to be wound around the drum 311, and the door 2 in FIG. 1 rotates clockwise about the rotation axis J1. As a result, the skin plate 21 moves away from the bottom surface 912 of the opening 91 (that is, rises), as indicated by the two-dot chain line in FIG. In addition, by rotating the drum 311 in reverse, the wire rope 36 is sent out from the drum 311, and the door body 2 rotates counterclockwise about the rotation axis J1. As a result, the skin plate 21 moves (that is, descends) toward the bottom surface 912 of the opening 91 . Thus, the door 2 is opened and closed at the opening 91 .

Radial gate 10 of FIG. 1 further includes load measuring unit 46 , goniometer 47 , water level gauge 11 , and degree of opening gauge 12 . The load measuring unit 46 and the angle meter 47 are included in the abnormality detection device 40 (see FIG. 3), which will be described later. As already mentioned, the load measuring section 46 is connected to the wire rope 36 . The load measuring unit 46 has, for example, a load cell or the like, and acquires the load (here, tension) applied to the wire rope 36 as a load evaluation value. The load measuring unit 46 may measure the load using something other than a load cell. In the example of FIG. 1 , the load measuring section 46 is connected to the wire rope 36 hooked on the pulley 26 of each plate support section 22 . The load measuring section 46 is individually provided for each plate support section 22 .

A goniometer 47 is attached to a predetermined position of the pedestal 24 of each plate support 22 . In the example of FIGS. 1 and 2, one goniometer 47 is provided in each plate support 22 at a position near the support 23 of the upper pedestal 24, and a goniometer 47 is provided at a position near the skin plate 21 of the pedestal 24. Another goniometer 47 is provided. The position near the bearing portion 23 where the goniometer 47 is attached to the pedestal 24 is, for example, a position closer to the bearing portion 23 than the skin plate 21, and preferably closer to the bearing portion 23 side than the center in the longitudinal direction. It is a close position. The position near the skin plate 21 where the goniometer 47 is attached to the pedestal 24 is, for example, a position closer to the skin plate 21 than the bearing portion 23, and preferably closer to the end of the skin plate 21 than the center in the longitudinal direction. It is a close position.

Each goniometer 47 acquires the angle of the pedestal 24 at the mounting position as the pedestal angle. A pedestal angle is an angle with respect to a predetermined reference plane. The reference plane is typically a horizontal plane, but it may be another plane such as the mounting plane of the goniometer 47 on the pedestal 24 in the fully closed state. As the goniometer 47, various angle sensors can be used, such as those that utilize the inclination of the liquid surface held inside, those that have an acceleration sensor, and the like. A goniometer 47 may be attached to a plurality of pedestals 24 on each plate support 22 .

The water level gauge 11 is, for example, a float-type water gauge, and measures the water level at the installation position of the radial gate 10 (that is, the water level in contact with the skin plate 21) by detecting the position of the float floating on the water surface. do. In this embodiment, the water level is the height from the bottom of the dam to the water surface. The water level gauge 11 may be a sonic, ultrasonic or pressure type water gauge or the like that measures the water level without using a float. The opening meter 12 detects the degree of opening of the door 2 using a wire separately attached to the door 2, for example. In the example of FIG. 1, the opening degree of the door 2 is the height (vertical distance) from the bottom surface 912 of the opening 91 (more precisely, the contact position of the watertight rubber) to the lower end of the skin plate 21 . The opening meter 12 may detect the opening of the door 2 using various sensors or the like.

FIG. 3 is a block diagram showing the configuration of the abnormality detection device 40. As shown in FIG. The abnormality detection device 40 detects abnormality in the radial gate 10 , and mainly detects abnormality in the bearing portion 23 . The abnormality detection device 40 includes a load measurement section 46 , an angle meter 47 and a determination section 41 . As described above, the load measuring unit 46 acquires the load evaluation value indicating the load applied to the wire rope 36 . Also, the goniometer 47 acquires the pedestal angle at a predetermined position. The determination unit 41 determines whether or not the radial gate 10 is abnormal. The function of the determination unit 41 is realized by the CPU or the like of the computer 4 executing arithmetic processing according to a predetermined program (that is, by the computer executing the program). The function of the determination unit 41 may be realized by a dedicated electric circuit, or a partially dedicated electric circuit may be used. In the present embodiment, the load measuring unit 46 and the angle meter 47 are provided on the left bank side and the right bank side, respectively. Therefore, in FIG. shown in blocks.

FIG. 4 is a diagram showing the flow of processing for detecting an abnormality in the radial gate 10 by the abnormality detection device 40. As shown in FIG. In the water gate system 1, for example, when the radial gate 10 is operated, that is, when the door body 2 is moved (the skin plate 21 is raised or lowered), the abnormality detection process of FIG. 4 is performed. Here, it is assumed that the door body 2 in the fully closed state indicated by the solid line in FIG. The same applies when the door body 2 is raised or lowered in a state away from the bottom surface 912 of the door (the same applies to the second embodiment described later).

In the abnormality detection process, first, acquisition of the load evaluation value of the wire rope 36 by the load measuring unit 46 is started (step S11). Further, acquisition of the pedestal angle of the pedestal 24 by the goniometer 47 is started (step S12). The load evaluation value and the pedestal angle are acquired almost continuously (strictly, repeatedly at minute time intervals). The load evaluation value and the pedestal angle are input to the determination unit 41 . Acquisition of the load evaluation value and acquisition of the pedestal angle may be started first, or may be started at the same time. The same applies to the end of acquiring the load evaluation value and the pedestal angle, which will be described later. In this processing example, only one goniometer 47 in each plate support section 22 is used, and the other goniometer 47 is not used. The goniometer 47 used in this processing example may be either the goniometer 47 near the bearing portion 23 or the goniometer 47 near the skin plate 21 . Also, an average value or the like of the measured values of both goniometers 47 may be used as the load evaluation value. In the following description, the measurement values (load evaluation value and pedestal angle) obtained by the load measurement unit 46 and the goniometer 47 of one plate support unit 22 will be focused, but the load measurement unit of the other plate support unit 22 Measured values obtained by 46 and goniometer 47 are similarly processed.

Here, changes in the load evaluation value and the pedestal angle when there is no abnormality in the radial gate 10 (hereinafter referred to as "normal state") will be described. FIG. 5 is a diagram showing changes in load evaluation values and pedestal angles in a normal state. The vertical axis in FIG. 5 indicates the load evaluation value and the magnitude of the pedestal angle, and the horizontal axis indicates time (the same applies to FIG. 7 described later). In FIG. 5, the line L11 indicates the change in the load evaluation value, and the line L12 indicates the change in the pedestal angle. FIG. 6 is a diagram schematically showing bending of the pedestal 24 in a normal state. In FIG. 6, the skin plate 21 and the pedestal 24 of the door 2 in the fully closed state are indicated by a solid line, and the skin plate 21 and the pedestal 24 of the door 2 at the time of starting which will be described later are indicated by a thick two-dot chain line. (The same applies to FIG. 8, which will be described later).

In the water gate system 1, at time t0 in FIG. 5, the drive unit 31 in FIG. 1 substantially starts applying force to the gate 2. When there is no slack in the wire rope 36, the winding start time of the wire rope 36 is time t0. If there is slack in the wire rope 36, the time t0 is when the slack in the wire rope 36 disappears after the start of driving the drum 311 (the same applies hereinafter). The load evaluation value of the wire rope 36 gradually increases with the lapse of time from time t0. Immediately after time t0, the trunnion hub 231 does not rotate with respect to the trunnion pin 232 due to the static friction force, but the pedestal 24 is bent (see the pedestal 24 indicated by the thick two-dot chain line in FIG. 6). ), the pedestal angle increases slightly. Note that the load evaluation value and the pedestal angle do not necessarily increase linearly, and the lines L11 and L12 do not need to be straight lines near time t0 (the same applies hereinafter).

After that, when the load evaluation value reaches the value V11 at time t11, the trunnion hub 231 starts rotating, that is, the door 2 starts. Time t11 is the moment when the maximum static frictional force acts between the trunnion hub 231 and the trunnion pin 232 . After time t11, the pedestal angle gradually increases over time with a greater inclination than before time t11. On the other hand, the dynamic friction force between the trunnion hub 231 and the trunnion pin 232 is smaller than the maximum static friction force and is substantially constant, so the load evaluation value is substantially constant at a value V12 lower than the value V11. Become. When the skin plate 21 reaches the set opening degree (height), winding of the wire rope 36 by the drum 311 is stopped, and the door body 2 is stopped.

Next, in the radial gate 10, changes in the load evaluation value and the pedestal angle when the support portion 23 is abnormal will be described. The first example of anomaly is an anomaly in the bearing portion 23, in which an anomaly in the fixation between the trunnion hub 231 and the trunnion pin 232 and an anomaly in sliding where the dynamic friction between them increases over the entire movable range have occurred. be. The radial gate 10 does not necessarily have both sticking abnormality and sliding abnormality. FIG. 7 is a diagram showing changes in load evaluation values and pedestal angles in states of sticking abnormality and sliding abnormality. In FIG. 7, a solid line L21 indicates changes in the load evaluation value in the states of sticking abnormality and sliding abnormality, and a solid line L22 indicates changes in the pedestal angle. Also, the change in the load evaluation value in the normal state is indicated by a dashed line L11, and the change in the pedestal angle is indicated by a dashed line L12. FIG. 8 is a diagram schematically showing bending of the pedestal 24 in a state of sticking abnormality.

Even in the abnormal fixation state, the load evaluation value of the wire rope 36 gradually increases with the lapse of time from time t0 as in the normal state. Door body 2 does not start. At this time, the pedestal angle is slightly increased due to bending of the pedestal 24 . After that, when the load evaluation value reaches the value V21 at time t21, the door 2 is started. Time t21 is the time when the door 2 is started, and is the moment when the maximum static frictional force acts between the trunnion hub 231 and the trunnion pin 232, like time t11 in the normal state. In the sticking abnormality, the value V21 of the load evaluation value at the time of starting is larger than the value V11 at the time of starting in the normal state. ) is larger than the bending of the pedestal 24 at the time of starting in the normal state (see the pedestal 24 indicated by a thick two-dot chain line in FIG. 6).

After time t21, the pedestal angle gradually increases over time with a greater inclination than before time t21. Also, the load evaluation value is substantially constant at a value V22 lower than the value V21. In the sliding abnormality, the period from the start of the door 2 to the stop of the door 2, that is, the value V22 of the load evaluation value during the movement of the door 2 is the value during the movement of the door 2 in the normal state. Larger than V12. The bending of the pedestal 24 during movement of the door 2 in the abnormal sliding state is also greater than the bending of the pedestal 24 during movement of the door 2 in the normal state.

The next example of abnormality is a specific angle abnormality in which the mechanical resistance between the trunnion hub 231 and the trunnion pin 232 increases when the pedestal 24 reaches a specific angle. FIG. 9 is a diagram showing the relationship between the load evaluation value and the pedestal angle in a state of specific angle abnormality. The vertical axis in FIG. 9 indicates the load evaluation value, and the horizontal axis indicates the pedestal angle. In FIG. 9, the solid line L31 indicates the relationship between the load evaluation value and the pedestal angle in the state of the specific angle abnormality, and the broken line L32 also indicates the relationship between the load evaluation value and the pedestal angle in the state of the sticking abnormality and the sliding failure. is shown.

In the example of the specific angle abnormality shown in FIG. 9, the value of the load evaluation value at the start of the door 2 is substantially the same as the value V11 at the start in the normal state, and the value of the load evaluation value immediately after the start is also normal. It is substantially the same as the value V12 during movement of the door 2 in the state. During the movement of the door 2, when the pedestal angle approaches the angle A31, the load evaluation value becomes somewhat larger than the value V12. Become. In the specific angle abnormality, the bending of the pedestal 24 when the pedestal angle is near the angle A31 temporarily increases.

In the abnormality detection process of FIG. 4, the determination unit 41 determines whether or not there is an abnormality in the support 23 based on the relationship between the load evaluation value and the pedestal angle (step S13). Specifically, in the determination of the presence or absence of sticking abnormality, the time t21 at which the pedestal angle changes abruptly is specified in the solid line L22 indicating the change in the pedestal angle in FIG. Time t21 is, for example, the time when the absolute value of the amount of change (inclination) of the pedestal angle becomes equal to or greater than a predetermined value, and is the time when the door 2 is started. Subsequently, the load evaluation value (value V21 in the example of FIG. 7) at the start of the door 2 is compared with the determination threshold value, and if the value is equal to or greater than the determination threshold value, the fixing abnormality has occurred in the bearing portion 23. is determined.

When an abnormality in the support portion 23 is detected, for example, a display indicating that an abnormality has occurred is displayed on the display of the computer 4 or the like. The same is true when other types of anomalies are detected. The notification indicating the occurrence of an abnormality may be performed by turning on a light, sounding a buzzer, or notifying an information communication terminal using e-mail or the like. If the load evaluation value at the start of the door 2 is less than the determination threshold value, it is determined that the support portion 23 is not stuck abnormally, and the notification indicating the occurrence of the abnormality is not performed.

As the determination threshold value, for example, a value obtained by adding a value twice or three times the standard deviation to the average value of the load evaluation values at the time of starting in the normal state is set. Further, the frictional force at the support portion 23 is affected by the water pressure acting on the skin plate 21 , and the load evaluation value, which is the tension of the wire rope 36 , is affected by the degree of opening of the door 2 . Therefore, the determination threshold may be corrected using the current water level and the degree of opening of the door 2 . In one example, when the water level is high, the determination threshold is large, and when the water level is low, the determination threshold is small. Further, when the opening degree of the door 2 is large, the determination threshold value becomes small, and when the opening degree is small, the determination threshold value becomes large. Similarly, the current water level and the degree of opening of the door 2 are used for the determination threshold used for determining the presence or absence of a sliding abnormality and the determination threshold used for determining the presence or absence of a specific angle abnormality, which will be described later. can be corrected. Any statistical method other than the comparison between the load evaluation value and the determination threshold value may be used to determine whether or not there is an abnormality in the determination unit 41 . The same is true for determining other types of anomalies.

Further, the presence or absence of sticking abnormality may be determined from the viewpoint of time. For example, the load evaluation value at the start of the door 2 is stored in the determination unit 41 each time the radial gate 10 is operated. The date and time of the operation is also associated with the load evaluation value at startup. As a result, the change over time of the load evaluation value at the time of starting is obtained, as indicated by the solid line L41 in FIG. The determination unit 41 generates, for example, an approximate curve representing the relationship between the load evaluation value at the time of starting and time from the current time to a predetermined time (for example, several weeks) before. Subsequently, a value obtained by adding a predetermined value to the current load evaluation value (estimated value) at the time of starting estimated from the approximate curve is set as the determination threshold value T4. When the current load evaluation value (actually measured value) at the time of starting is equal to or greater than the determination threshold value T4, the load evaluation value is rapidly increasing, and a sudden fixation abnormality has occurred in the bearing portion 23. is determined.

When the current load evaluation value at the time of starting is less than the determination threshold value T4 (see broken line L42 in FIG. 10), it is determined that the fixing abnormality has not occurred in the bearing portion 23, and the notification indicating the occurrence of the abnormality is issued. Not done. In the determination of the presence or absence of abnormality, another technique based on the change over time of the load evaluation value at the time of starting may be employed. Further, the occurrence of an abnormality may be predicted from the approximate curve described above, or the occurrence of an abnormality may be predicted by machine learning or the like with respect to changes over time in the load evaluation value at the time of start (the representative value of the load evaluation value described later). The same applies to changes over time).

In the determination of the presence or absence of the sliding abnormality, for example, similarly to the determination of the presence or absence of the sticking abnormality, the start time (time t21) of the door body 2 is specified in the solid line L22 indicating the change in the pedestal angle in FIG. . Subsequently, the representative value of the load evaluation value during the period from the start of the door 2 to the stop of the door 2, that is, during the movement of the door 2 (hereinafter also simply referred to as “the representative value of the load evaluation”). ) is required. The representative value of the load evaluation values is, for example, the average value or the median value of the load evaluation values in the whole or part of the period. A representative value of the load evaluation values is compared with a determination threshold value, and if the representative value is equal to or greater than the determination threshold value, it is determined that the bearing portion 23 has a sliding abnormality.

The presence/absence of sliding abnormality may also be determined from a time-dependent viewpoint in the same manner as the presence/absence of sticking abnormality. For example, the representative value of the load evaluation value during movement of the door 2 is stored in the determination unit 41 each time the radial gate 10 is operated. The representative value of the load evaluation value is also associated with the date and time of the driving. The determination unit 41 generates, for example, an approximate curve representing the relationship between the representative value of the load evaluation values and time from the current time to a predetermined time (for example, several weeks) before. Subsequently, a value obtained by adding a predetermined value to the representative value (estimated value) of the current load evaluation values estimated from the approximate curve is set as the determination threshold value. When the current representative value (actually measured value) of the load evaluation values is equal to or greater than the determination threshold value, the representative value of the load evaluation values suddenly increases, and a sudden sliding abnormality occurs in the bearing portion 23. It is determined that

In the determination of the presence or absence of the specific angle abnormality, for example, in the solid line L31 indicating the relationship between the load evaluation value and the pedestal angle in FIG. ), the representative value and the maximum value of the load evaluation value are obtained. Subsequently, the absolute value of the difference between the maximum value and the representative value is determined, and the absolute value of the difference is compared with the decision threshold. When the absolute value of the difference is equal to or greater than the determination threshold, that is, when the load evaluation value fluctuates greatly during movement of the door 2, it is determined that the support 23 has a specific angle abnormality. be. When a specific angle abnormality is detected, it is preferable that the pedestal angle (the angle A31 in the example of FIG. 9) at which the maximum value is obtained is identified, and the operator or the like is notified of the occurrence of the abnormality. Variation in the load evaluation value may be evaluated using a value other than the difference between the maximum value and the representative value.

In the abnormality detection device 40, when the door 2 reaches the set opening, acquisition of the load evaluation value by the load measuring unit 46 and acquisition of the pedestal angle by the goniometer 47 are terminated (steps S14 and S15). ). Thereby, the abnormality detection process in the abnormality detection device 40 is completed.

As described above, the abnormality detection device 40 includes the load measurement unit 46 that acquires the value indicating the load applied to the wire rope 36 as the load evaluation value, and acquires the angle at the predetermined position of the pedestal 24 as the pedestal angle. An angle meter 47 and a determination unit 41 that determines whether or not there is an abnormality in the support 23 based on the relationship between the load evaluation value and the pedestal angle during operation of the radial gate 10 . The abnormality detection device 40 can appropriately detect an abnormality in the bearing portion 23 using the load evaluation value and the pedestal angle. Moreover, in the water gate system 1 including the radial gate 10 and the abnormality detection device 40, even if an abnormality occurs in the radial gate 10, it can be dealt with quickly, and stable operation can be realized.

Preferably, the determination unit 41 identifies when the door 2 is started from the change in the angle of the pedestal, and determines whether or not there is an abnormality in the support 23 based on the load evaluation value at the time of start. As a result, the fixing abnormality of the support portion 23 can be detected with high accuracy. In addition, the determination unit 41 stores the load evaluation value at the start of the door body 2 each time the radial gate 10 is operated, and determines whether or not there is an abnormality in the support 23 based on the time-dependent change in the load evaluation value at the time of start. do. As a result, a sudden fixation abnormality of the support portion 23 can be detected with high accuracy.

Preferably, the determination unit 41 determines whether or not there is an abnormality in the support portion 23 based on the representative value of the load evaluation values while the door 2 is moving. Thereby, the sliding abnormality of the bearing portion 23 can be detected with high accuracy. Further, the determination unit 41 stores the representative value of the load evaluation value during the movement of the door body 2 each time the radial gate 10 is operated, and determines whether the bearing unit 23 is abnormal based on the change over time of the representative value of the load evaluation value. Determine presence/absence. As a result, a sudden sliding abnormality of the support portion 23 can be detected with high accuracy.

Preferably, the determination unit 41 identifies the start time of the door 2 from the change in the pedestal angle, and determines whether or not there is an abnormality in the support 23 based on the variation of the load evaluation value during the movement of the door 2. . Thereby, the specific angle abnormality of the support portion 23 can be detected with high accuracy.

When the wire rope 36, the support portion 23, and the pedestal 24 are provided on the left bank side and the right bank side of the door body 2, respectively, in the preferred abnormality detection device 40, the load evaluation value of the wire rope 36 on the left bank side is the same. , and the load evaluation value for the wire rope 36 on the right bank is obtained by another load measuring unit 46 . Further, the pedestal angle of the pedestal 24 on the left bank side is obtained by one goniometer 47 , and the pedestal angle of the pedestal 24 on the right bank side is obtained by the other goniometer 47 . Then, the determination unit 41 determines whether or not there is an abnormality with respect to the left bank side support portion 23 and the right bank side support portion 23 individually.

With such an abnormality detection device 40, it is possible to more accurately identify which of the left bank side and the right bank side is the cause of sticking of the support portion 23. FIG. In the abnormality detection device 40, if there is a large difference in the load evaluation values at the time of starting between the left bank side and the right bank side, the operator may be notified of this (the load evaluation value during the movement of the door body 2). The same is true for the representative value of ). As a result, it becomes possible for the operator to find the cause of a sudden abnormality such as a foreign object caught in the support portion 23 on the one bank side. Depending on the design of the abnormality detection device 40, the load measuring section 46 and the goniometer 47 may be provided on only one of the left bank side and the right bank side.

The determination unit 41 may detect the sticking abnormality when the difference between the load evaluation value at start-up on the left bank side and the load evaluation value at start-up on the right bank side is equal to or greater than a predetermined value. Similarly, when the difference between the representative value of the load evaluation value on the left bank side (the representative value of the load evaluation value while the door body 2 is moving) and the representative value of the load evaluation value on the right bank side is equal to or greater than a predetermined value, A sliding anomaly may be detected.

In the abnormality detection device 40, the load applied to the drive section 31 of the switching device 3 may be measured as the load evaluation value. In one example, a load measuring section (ammeter) connected to the driving section 31 measures a current value flowing through the electric motor of the driving section 31 as a load evaluation value. Such a load evaluation value is also a value that substantially indicates the load applied to the wire rope 36 . Further, the drive source of the drive unit 31 may be a hydraulic cylinder that performs linear motion, a hydraulic motor that performs rotary motion, or the like. In this case, in the load measuring unit, for example, the pressure in the hydraulic cylinder, the pressure of the hydraulic oil sent to the hydraulic cylinder or the hydraulic motor, or the current value of the electric motor used for pumping the hydraulic oil is used as the load evaluation value. measured. As described above, the load evaluation value may be various types of values that substantially indicate the load applied to the coupling medium between the door 2 and the driving portion 31 . In addition, when the drive source of the drive part 31 is a hydraulic cylinder, the cylinder rod connected to the door 2 becomes a connection medium.

As described above, when there is a fixation abnormality in the support portion 23, the bending of the pedestal 24 when the door 2 is started becomes larger than the bending of the pedestal 24 when it is started in a normal state. Similarly, when a sliding abnormality occurs, the bending of the pedestal 24 during movement of the door 2 is greater than the bending of the pedestal 24 during movement of the door 2 in the normal state. Further, when the specific angle abnormality occurs, the bending of the pedestal 24 when the pedestal angle becomes close to the specific angle temporarily increases. Thus, when there is an abnormality in the support portion 23 and the trunnion hub 231 and the trunnion pin 232 do not slide well, the bending of the pedestal 24 increases and the absolute value of the strain of the pedestal 24 also increases.

Therefore, in the abnormality detection device 40, instead of the load applied to the wire rope 36, the distortion of the pedestal 24 can be obtained as the load evaluation value to perform the same processing as described above. That is, it is possible to use a strain gauge attached to a predetermined position of the pedestal 24 as a load measuring unit. The mounting position of the strain gauge on the pedestal 24 is not particularly limited, but the vicinity of the support portion 23 where the bending of the pedestal 24 tends to be large is preferable. Also when the strain of the pedestal 24 is acquired as the load evaluation value, the determination unit 41 determines the load evaluation value at the start of the door body 2, the representative load evaluation value during movement of the door body 2, or the load evaluation value during the movement of the door body 2. It is possible to determine whether or not there is an abnormality in the bearing portion 23 based on the variation in the load evaluation value during the movement of the . The strain gauges may be attached to multiple pedestals 24 or may be attached to only one pedestal 24 . A configuration that measures the strain of the pedestal 24 using a length measuring device, a camera, or the like may be used as the load measuring section.

Also, the magnitude of strain on the pedestal 24 depends on the load applied to the pedestal 24 . Therefore, it can be said that various values indicating the load applied to the pedestal 24 can be used as the load evaluation value in the abnormality detection device 40 . As described above, the load measurement unit in the abnormality detection device 40 may acquire a value indicating the load applied to the connecting medium (wire rope 36 or the like) or the pedestal 24 .

FIG. 11 is a block diagram showing the configuration of an abnormality detection device 40a according to the second embodiment of the invention. In this embodiment, in the water gate system 1 of FIG. 1, both of the two goniometers 47 provided on one pedestal 24 of each plate support section 22 are used, and the load measuring section 46 is not used. In the following description, the goniometer 47 arranged in the vicinity of the support portion 23 of the pedestal 24 will be referred to as the "first goniometer 47", and the goniometer 47 arranged in the vicinity of the skin plate 21 of the pedestal 24 will be referred to as the " Second goniometer 47”.

The first goniometer 47 acquires the angle of the pedestal 24 in the vicinity of the support portion 23 as the first pedestal angle. The second goniometer 47 acquires the angle of the pedestal 24 in the vicinity of the skin plate 21 as the second pedestal angle. In the water gate system 1, the first goniometer 47 and the second goniometer 47 are provided on the left bank side and the right bank side, respectively. A double goniometer 47 is indicated by a block.

FIG. 12 is a diagram showing the flow of processing for detecting an abnormality in the radial gate 10 by the abnormality detection device 40a. Similar to the first embodiment, when the door 2 is moved, the abnormality detection process of FIG. 12 is performed. In the abnormality detection process, first, acquisition of the first pedestal angle by the first goniometer 47 is started (step S21). Also, acquisition of the second pedestal angle by the second goniometer 47 is started (step S22). The first pedestal angle and the second pedestal angle are obtained approximately continuously (strictly speaking, repeatedly at minute time intervals). The first pedestal angle and the second pedestal angle are input to the determination unit 41 . Either the acquisition of the first pedestal angle or the acquisition of the second pedestal angle may be started first, or may be started simultaneously. The same applies to the end of acquisition of the first pedestal angle and the second pedestal angle, which will be described later. The following description focuses on the measurements (first pedestal angle and second pedestal angle) obtained by the first goniometer 47 and second goniometer 47 of one of the plate supports 22, but the other plate The same processing is performed on the measured values acquired by the first goniometer 47 and the second goniometer 47 of the support section 22 .

Here, changes in the first pedestal angle and the second pedestal angle when the radial gate 10 is normal (that is, in a normal state) will be described. FIG. 13 is a diagram showing changes in the first pedestal angle and the second pedestal angle in a normal state. The vertical axis in FIG. 13 indicates the magnitude of the first pedestal angle and the second pedestal angle, and the horizontal axis indicates time (the same applies to FIG. 14 described later). In FIG. 13, the change in the first pedestal angle is indicated by line L51, and the change in the second pedestal angle is indicated by line L52.

As in the first embodiment, immediately after time t0, the trunnion hub 231 in FIG. The pedestal angle and the secondary pedestal angle are slightly larger. At this time, the pedestal 24 can be regarded as a cantilever with the support 23 as a fixed end (see FIGS. 6 and 8). The second pedestal angle is different. In fact, as the bending of the pedestal 24 increases over time, the absolute value of the difference between the first pedestal angle and the second pedestal angle (hereinafter referred to as the "pedestal evaluation value") gradually increases. growing. In FIG. 13, near time t0, the slope of the line L52 indicating the change in the second trestle angle becomes greater than the slope of the line L51 indicating the change in the first trestle angle. Note that the first pedestal angle and the second pedestal angle do not necessarily increase linearly, and the lines L51 and L52 do not need to be straight lines near time t0 (the same applies hereinafter).

After that, at time t51, the trunnion hub 231 starts rotating, that is, the door 2 starts. At this time, the pedestal evaluation value indicating the difference between the first pedestal angle and the second pedestal angle is the value V51. After time t51, the dynamic friction force between the trunnion hub 231 and the trunnion pin 232 and the bending of the pedestal 24 are substantially constant, so the pedestal evaluation value is also substantially constant V52. After time t51, the first pedestal angle and the second pedestal angle gradually increase with the lapse of time with a greater inclination than before time t51. When the skin plate 21 reaches the set opening, the door 2 stops. In the example of FIG. 13, the value V52 of the pedestal evaluation value after time t51 is substantially the same as the value V51 of the pedestal evaluation value at time t51, but the value V52 may be smaller than the value V51. (The same applies to FIGS. 14 and 15 described later).

Next, in the radial gate 10, changes in the first pedestal angle and the second pedestal angle when the support portion 23 is abnormal will be described. FIG. 14 is a diagram showing changes in the first pedestal angle and the second pedestal angle in states of sticking abnormality and sliding abnormality. In FIG. 14, the change in the first pedestal angle is indicated by line L61, and the change in the second pedestal angle is indicated by line L62.

In the state of sticking abnormality, as in the normal state, the first pedestal angle and the second pedestal angle gradually increase with the lapse of time from time t0. Even then, the door body 2 does not start. After that, at time t61, the door 2 is started. In the sticking abnormality, the bending of the pedestal 24 at the start of the door 2 is larger than the bending of the pedestal 24 at the starting in the normal state. , is larger than the value V51 (see FIG. 13) at the time of starting in the normal state.

After time t61, the first pedestal angle and the second pedestal angle gradually increase over time with a greater inclination than before time t61. Also, the pedestal evaluation value becomes substantially constant at the value V62. In the sliding abnormality, the period from the start of the door 2 to the stop of the door 2, that is, the bending of the pedestal 24 during the movement of the door 2 is different from the pedestal during the movement of the door 2 in the normal state. greater than 24 bends. Therefore, the value V62 of the pedestal evaluation value during movement of the door 2 in the state of abnormal sliding becomes larger than the value V52 (see FIG. 13) of the pedestal evaluation value during movement of the door 2 in the normal state.

FIG. 15 is a diagram showing the relationship between the pedestal evaluation value and the first pedestal angle in a state of specific angle abnormality. The vertical axis in FIG. 15 indicates the pedestal evaluation value, and the horizontal axis indicates the first pedestal angle. In FIG. 15, the relationship between the pedestal evaluation value and the first pedestal angle in the state of the specific angle abnormality is indicated by a solid line L71. is also indicated by a dashed line L72.

In the example of the specific angle abnormality shown in FIG. 15, the value of the pedestal evaluation value at the start of the door 2 is substantially the same as the value at the start in the normal state, and the value of the pedestal evaluation value immediately after the start is also It is substantially the same as the value V52 during movement of the door 2 in the normal state. In the specific angle abnormality, the mechanical resistance between the trunnion hub 231 and the trunnion pin 232 increases when the first pedestal angle becomes near the specific angle A71, and the bending of the pedestal 24 also increases temporarily. Become. Therefore, when the first pedestal angle approaches the angle A71 during the movement of the door 2, the pedestal evaluation value becomes somewhat larger than the value V52, and when the first pedestal angle departs from the angle A71, the pedestal evaluation value The value becomes substantially the same as the value V52.

In the abnormality detection process of FIG. 12, the determination unit 41 determines whether or not there is an abnormality in the support 23 based on the pedestal evaluation value (step S23). Specifically, in the determination of the presence/absence of sticking abnormality, the time t61 at which the first trestle angle changes abruptly is specified on the solid line L61 indicating the change in the first trestle angle in FIG. Time t61 is, for example, the time when the absolute value of the change amount (inclination) of the first pedestal angle becomes equal to or greater than a predetermined value, and is the time when the door 2 is started. The starting time of the door 2 may be specified using the second pedestal angle. Subsequently, the pedestal evaluation value (the value V61 in the example of FIG. 14) at the start of the door 2 is compared with the determination threshold value, and if it is equal to or greater than the determination threshold value, the fixing abnormality has occurred in the support portion 23. is determined to be In this case, a notification indicating the occurrence of an abnormality is provided.

If the pedestal evaluation value at the start of the door 2 is less than the determination threshold value, it is determined that the support portion 23 does not have a fixation abnormality, and no notification indicating the occurrence of the abnormality is provided. As in the first embodiment, the determination threshold may be corrected using the current water level and the degree of opening of the door 2 . Further, the determination unit 41 may determine that the sticking abnormality has occurred when the pedestal evaluation value exceeds the determination threshold regardless of the first pedestal angle.

Further, the presence or absence of sticking abnormality may be determined from the viewpoint of time. For example, the pedestal evaluation value at the start of the door 2 is stored in the determination unit 41 each time the radial gate 10 is operated. The date and time of the driving is also associated with the pedestal evaluation value at the start. As a result, as indicated by the solid line L81 in FIG. 16, the change over time of the pedestal evaluation value at the start is obtained. The determination unit 41 generates, for example, an approximate curve representing the relationship between the pedestal evaluation value at the time of starting and time from the current time to a predetermined time (for example, several weeks) before. Subsequently, a value obtained by adding a predetermined value to the current pedestal evaluation value (estimated value) at the time of starting estimated from the approximate curve is set as the determination threshold value T8. When the current pedestal evaluation value (actually measured value) at the time of start-up is equal to or greater than the determination threshold value T8, the pedestal evaluation value is rapidly increasing, and a sudden fixation abnormality has occurred in the support portion 23. is determined to be

If the current pedestal evaluation value at the time of starting is less than the determination threshold value T8 (see broken line L82 in FIG. 16), it is determined that the support 23 is not stuck abnormally. In the determination of the presence or absence of abnormality, another method based on the time-dependent change in the pedestal evaluation value at the time of starting may be employed. In addition, the occurrence of an abnormality may be predicted from the approximate curve described above, or the occurrence of an abnormality may be predicted by machine learning or the like with respect to changes over time in the pedestal evaluation value at the time of start (representative of the pedestal evaluation value described later). (same for change in value over time).

In the determination of the presence or absence of sliding abnormality, for example, similar to the determination of the presence or absence of sticking abnormality, the start time of door body 2 (time t61) is specified in solid line L61 indicating the change in the angle of the first pedestal in FIG. be done. Subsequently, the representative value of the pedestal evaluation value during the period from the start of the door 2 to the stop of the door 2, that is, during the movement of the door 2 (hereinafter simply referred to as the “representative value of the pedestal evaluation value”) ) is required. The representative value of the pedestal evaluation value is, for example, the average value or the median value of the pedestal evaluation values in the whole or part of the period. A representative value of the pedestal evaluation values is compared with a determination threshold value, and if the representative value is equal to or greater than the determination threshold value, it is determined that the support portion 23 has a sliding abnormality.

The presence/absence of sliding abnormality may also be determined from a time-dependent viewpoint in the same manner as the presence/absence of sticking abnormality. For example, a representative value of the pedestal evaluation values during movement of the door 2 is stored in the determination unit 41 each time the radial gate 10 is operated. The representative value of the pedestal evaluation value is also associated with the date and time of the driving. The determination unit 41 generates, for example, an approximate curve representing the relationship between the representative value of the pedestal evaluation value and time from the current time to a predetermined time (for example, several weeks) before. Subsequently, a value obtained by adding a predetermined value to the representative value (estimated value) of the current pedestal evaluation value estimated from the approximate curve is set as the determination threshold. When the current representative value (actually measured value) of the pedestal evaluation value is equal to or greater than the determination threshold value, the representative value of the pedestal evaluation value rises rapidly, indicating that the bearing portion 23 has a sudden sliding abnormality. is determined to have occurred.

In the determination of the presence or absence of the specific angle abnormality, for example, in the solid line L71 indicating the relationship between the pedestal evaluation value and the first pedestal angle in FIG. The representative value and the maximum value of the pedestal evaluation value during the movement of the pedestal are obtained. Subsequently, the absolute value of the difference between the maximum value and the representative value is determined, and the absolute value of the difference is compared with the decision threshold. If the absolute value of the difference is greater than or equal to the determination threshold, that is, if the pedestal evaluation value fluctuates significantly during movement of the door 2, it is determined that the support 23 has a specific angle abnormality. be done. When a specific angle abnormality is detected, it is preferable that the first trestle angle (the angle A71 in the example of FIG. 15) at which the maximum value is obtained is identified, and the operator or the like is notified of the occurrence of the abnormality. Variation in the pedestal evaluation value may be evaluated using a value other than the difference between the maximum value and the representative value.

In the abnormality detection device 40a, when the skin plate 21 reaches the set opening, acquisition of the first pedestal angle by the first goniometer 47 and acquisition of the second pedestal angle by the second goniometer 47 are completed. (steps S24, S25). This completes the abnormality detection process in the abnormality detection device 40a. In the above processing example, the value indicating the difference between the first pedestal angle and the second pedestal angle was used as the pedestal evaluation value. For example, when (second pedestal angle/first pedestal angle)) is used as the pedestal evaluation value, similar processing is possible.

As described above, the abnormality detection device 40a includes the first goniometer 47 that acquires the angle of the pedestal 24 in the vicinity of the support portion 23 as the first pedestal angle, and the angle of the pedestal 24 in the vicinity of the skin plate 21. A second goniometer 47 for acquiring the angle as a second pedestal angle, and a pedestal evaluation value indicating the difference or ratio between the first pedestal angle and the second pedestal angle during operation of the radial gate 10. and a judgment unit 41 for judging whether or not there is an abnormality in the support portion 23 . The abnormality detection device 40a can appropriately detect an abnormality in the support portion 23 using the pedestal evaluation value. Moreover, in the water gate system 1 including the radial gate 10 and the abnormality detection device 40a, even if an abnormality occurs in the radial gate 10, it can be dealt with quickly, and stable operation can be realized.

Preferably, the determination unit 41 identifies when the door body 2 is started from the change in the first pedestal angle or the second pedestal angle, and determines whether there is an abnormality in the support part 23 based on the pedestal evaluation value at the time of start. judge. As a result, the fixing abnormality of the support portion 23 can be detected with high accuracy. Further, the determination unit 41 stores the pedestal evaluation value at the start of the door body 2 each time the radial gate 10 is operated, and determines whether there is an abnormality in the support 23 based on the time-dependent change in the pedestal evaluation value at the time of start. judge. As a result, a sudden fixation abnormality of the support portion 23 can be detected with high accuracy.

Preferably, the determination unit 41 determines whether or not there is an abnormality in the support portion 23 based on the representative value of the pedestal evaluation values during the movement of the door 2 . Thereby, the sliding abnormality of the bearing portion 23 can be detected with high accuracy. In addition, the determination unit 41 stores the representative value of the pedestal evaluation value during the movement of the door 2 each time the radial gate 10 is operated, and based on the change over time of the representative value of the pedestal evaluation value, the Determine the presence or absence of anomalies. As a result, a sudden sliding abnormality of the support portion 23 can be detected with high accuracy.

Preferably, the determining unit 41 identifies the starting time of the door body 2 from the change in the first pedestal angle or the second pedestal angle, and based on the fluctuation of the pedestal evaluation value during the movement of the door body 2, the support is determined. The presence or absence of abnormality in the unit 23 is determined. Thereby, the specific angle abnormality of the support portion 23 can be detected with high accuracy.

In the case where the door body 2 is provided with the supporting portion 23 and the pedestal 24 on the left bank side and the right bank side, respectively, the preferred abnormality detection device 40a is configured such that the first pedestal angle and the second pedestal angle of the pedestal 24 on the left bank side are Column angles are obtained by one first goniometer 47 and one second goniometer 47, respectively. Further, the first pedestal angle and the second pedestal angle of the pedestal 24 on the right bank side are acquired by the other first goniometer 47 and the other second goniometer 47, respectively. Then, the determination unit 41 determines whether or not there is an abnormality with respect to the left bank side support portion 23 and the right bank side support portion 23 individually.

With such an abnormality detection device 40a, it is possible to more accurately identify which of the left bank side and the right bank side is the cause of the fixation of the support portion 23 . In the abnormality detection device 40a, when the difference in the pedestal evaluation value at the time of starting is large between the left bank side and the right bank side, the operator may be notified to that effect (the pedestal during the movement of the door body 2). The same applies to the representative value of the evaluation value). As a result, it becomes possible for the operator to find the cause of a sudden abnormality such as a foreign object caught in the support portion 23 on the one bank side. Depending on the design of the abnormality detection device 40a, the first goniometer 47 and the second goniometer 47 may be provided on only one of the left bank side and the right bank side. Alternatively, only the first goniometer 47 or only the second goniometer 47 may be provided on each of the left bank side and the right bank side, and the abnormality may be determined based on the difference between the left and right banks.

The determining unit 41 may detect the sticking abnormality when the difference between the pedestal evaluation value at the time of starting on the left bank side and the pedestal evaluation value at the time of starting on the right bank side is equal to or greater than a predetermined value. Similarly, the difference between the representative value of the pedestal evaluation values on the left bank side (the representative value of the pedestal evaluation values during movement of the door body 2) and the representative value of the pedestal evaluation values on the right bank side becomes equal to or greater than a predetermined value. In some cases, a sliding anomaly may be detected.

Various modifications are possible for the abnormality detection devices 40 and 40a and the abnormality detection method.

When acquiring the strain of the pedestal 24 using the strain gauge, the abnormality detection device 40 detects an abnormality by comparing the strain of the pedestal 24 on the left bank side with the strain of the pedestal 24 on the right bank side. is also possible. For example, on each of the left bank side and the right bank side, the determination unit 41 stores the maximum absolute value of the strain of the pedestal 24 (hereinafter referred to as “maximum strain”) each time the radial gate 10 is operated. Typically, the maximum strain is the start-up strain of the door leaf 2 . As a result, the change in maximum strain of the pedestal 24 over time is obtained as shown in FIG. In FIG. 17, the change over time of the maximum strain on the left bank side is indicated by a dashed line L91, and the change over time of the maximum strain on the right bank side is indicated by a solid line L92. The determining unit 41 obtains the absolute value of the difference between the maximum strain of the pedestal 24 on the left bank side and the maximum strain of the pedestal 24 on the right bank side. 23 is determined to have an abnormality (here, a fixation abnormality). In the same manner as described above, the presence or absence of a sliding abnormality in the bearing portion 23 may be determined by using the representative value of the strain after the occurrence of the maximum strain.

In the abnormality detection device 40a, in addition to the first goniometer 47 and the second goniometer 47, a sensor such as another goniometer or a strain gauge is provided for one pedestal 24, and the sensor is used to detect the door. A start time of the body 2 may be identified.

The radial gate 10 may be a tension radial gate that allows water to flow from the bearing 23 side to the skin plate 21 side.

The configurations in the above embodiment and each modified example may be combined as appropriate as long as they do not contradict each other.

2 Door 10 Radial Gate 21 Skin Plate 23 Supporting Part 24 Pillar 31 Driving Part 36 Wire Rope 40, 40a Abnormality Detection Device 41 Judgment Part 46 Load Measurement Part 47 Angle Meter S11 to S15, S21 to S25 Step

Claims (12)

An abnormality detection device for detecting an abnormality in a radial gate,
In the radial gate, the door body and the driving part are connected by a connecting medium, and the skin plate and the support part are connected by the pedestal in the door body, and the value indicating the load applied to the connecting medium or the pedestal is the load evaluation value. a load measuring unit obtained as
a goniometer for acquiring an angle of a predetermined position of the pedestal as a pedestal angle;
a determination unit that determines whether or not there is an abnormality in the support based on the relationship between the load evaluation value and the pedestal angle during operation of the radial gate;
An abnormality detection device comprising: The abnormality detection device according to claim 1,
The determination unit identifies the starting time of the door from the change in the pedestal angle, and based on the load evaluation value at the time of starting or a representative value of the load evaluation values during the movement of the door. and an abnormality detection device for determining whether or not there is an abnormality in the support. The abnormality detection device according to claim 2,
The determination unit stores the load evaluation value at the start of the gate body or a representative value of the load evaluation values during the movement of the gate body for each operation of the radial gate, and stores the load evaluation value at the time of the start. An anomaly detection device that determines whether or not there is an anomaly in the support portion based on a change in the evaluation value over time or a change in the representative value of the load evaluation value over time. The abnormality detection device according to any one of claims 1 to 3,
The judging section identifies the start time of the door body from the change in the pedestal angle, and judges whether or not there is an abnormality in the support section based on the fluctuation of the load evaluation value during the movement of the door body. An anomaly detection device characterized by: The abnormality detection device according to any one of claims 1 to 4,
A coupling medium, a bearing portion and a pedestal are provided on each of the left bank side and the right bank side of the door body,
a load evaluation value of the connecting medium or the pedestal on the left bank side is obtained by the load measuring unit, and a load evaluated value of the connecting medium or the pedestal on the right bank side is obtained by another load measuring unit;
A pedestal angle of the pedestal on the left bank side is obtained by the goniometer, and a pedestal angle of the pedestal on the right bank side is obtained by another goniometer,
The abnormality detection device, wherein the determination section individually determines whether or not there is an abnormality with respect to the support section on the left bank side and the support section on the right bank side. An abnormality detection device for detecting an abnormality in a radial gate,
a first goniometer, wherein a skin plate and a support are connected by a pedestal in the door body of the radial gate, and the angle of the pedestal in the vicinity of the support is obtained as a first pedestal angle;
a second goniometer that acquires the angle of the pedestal in the vicinity of the skin plate as a second pedestal angle;
a determination unit that determines whether or not there is an abnormality in the support based on a pedestal evaluation value that indicates the difference or ratio between the first pedestal angle and the second pedestal angle when the radial gate is operated; ,
An abnormality detection device comprising: The abnormality detection device according to claim 6,
The determining unit determines whether or not there is an abnormality in the support based on the pedestal evaluation value at the time of starting the door body or a representative value of the pedestal evaluation values during movement of the door body. An anomaly detection device characterized by: The abnormality detection device according to claim 7,
The determination unit stores the pedestal evaluation value at the start of the gate body or a representative value of the pedestal evaluation values during the movement of the gate body for each operation of the radial gate, An anomaly detection device that determines whether or not there is an anomaly in the support portion based on the temporal change of the pedestal evaluation value or the temporal change of the representative value of the pedestal evaluation value. The abnormality detection device according to any one of claims 6 to 8,
The abnormality detection device, wherein the determination unit determines whether or not there is an abnormality in the support based on a change in the pedestal evaluation value during movement of the door body. The abnormality detection device according to any one of claims 6 to 9,
A supporting portion and a pedestal are provided on each of the left bank side and the right bank side of the door body,
A first pedestal angle and a second pedestal angle of the pedestal on the left bank side are obtained by the first goniometer and the second goniometer, respectively;
A first pedestal angle and a second pedestal angle of the pedestal on the right bank side are obtained by another first goniometer and another second goniometer, respectively;
The abnormality detection device, wherein the determination section individually determines whether or not there is an abnormality with respect to the support section on the left bank side and the support section on the right bank side. An abnormality detection method for detecting an abnormality in a radial gate,
In the radial gate, the door body and the driving part are connected by a connecting medium, and the skin plate and the support part are connected by the pedestal in the door body, and the value indicating the load applied to the connecting medium or the pedestal is the load evaluation value. obtaining as
obtaining an angle at a predetermined position of the pedestal as a pedestal angle;
a step of determining whether or not there is an abnormality in the bearing portion based on the relationship between the load evaluation value and the pedestal angle during operation of the radial gate;
An anomaly detection method, comprising: An abnormality detection method for detecting an abnormality in a radial gate,
A skin plate and a supporting portion are connected by a pedestal in the door body of the radial gate, and obtaining an angle of the pedestal in the vicinity of the supporting portion as a first pedestal angle;
obtaining the angle of the pedestal in the vicinity of the skin plate as a second pedestal angle;
a step of determining whether or not there is an abnormality in the support portion during operation of the radial gate based on a pedestal evaluation value that indicates the difference or ratio between the first pedestal angle and the second pedestal angle;
An anomaly detection method, comprising:

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