CN209181747U - A kind of bridge pier real-time safety monitoring system - Google Patents
A kind of bridge pier real-time safety monitoring system Download PDFInfo
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- CN209181747U CN209181747U CN201821615821.6U CN201821615821U CN209181747U CN 209181747 U CN209181747 U CN 209181747U CN 201821615821 U CN201821615821 U CN 201821615821U CN 209181747 U CN209181747 U CN 209181747U
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- probing
- frame
- connecting rod
- fathometer
- fastening
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Abstract
The utility model discloses a kind of bridge pier real-time safety monitoring systems, including probing frame fixed device, probing frame, simple beam fathometer, fathometer regulating part；Probing frame is connected by the fixed device of probing frame with bridge pier；Probing frame is hemispherical rack, and medial center has been spirally distributed probing track from the inside to the outside；Probing regulating part includes probing motor, connecting rod, sliding block, adjusts connecting rod, fathometer connecting rod；Probing motor is fixed on probing frame, and output shaft is connected by connecting rod with sliding block；The junction of probing motor output shaft and connecting rod is located at the sphere center position of probing frame；Sliding block is located in probing track；Fathometer connecting rod one end is rotatedly connected with probing frame, and positioned at the center of helical form probing track, the other end installs simple beam fathometer；Connecting rod two end is adjusted to be rotatedly connected in the middle part of sliding block, fathometer connecting rod respectively.The utility model can the underwater silt underwashing depth of real-time monitoring bridge pier, facilitate carry out simple beam fathometer installing and dismounting.
Description
Technical field
The utility model belongs to bridge inspection and maintenance field, especially bridge safty monitoring and early warning field, more specifically
Say it is to be related to bridge pier safety real-time monitoring and early warning system.
Background technique
Large bridge is the lifeline of a country, costly, once accident occurs, will cause great people
Member and economic loss, social influence are severe.Bridge pier is the important component of bridge.Bridge pier basal part will receive in use
Current scour, erosion, so that the bearing capacity of bridge and the anti-flexing bearing capacity of pile foundation reduce.Simultaneously as punching
Brush effect, the lateral impact forces of water flow can be continuously increased.
Countries in the world all damaging due to washing away for a long time because of water there are many bridge every year, according to data statistics, bridge that the U.S. collapses
Liang Zhong, 32.8% be all due to washing away bridge pier caused by；In Colombia's bridge collapse, 35% mixed territory bridge collapse is by rushing
Caused by brush.Therefore, it washes away on influence caused by bridge pier always water conservancy part and traffic department in bridge construction deployment
The important factor in order of consideration.
The existing a large amount of bridge in China has security risk, and long-term due to water flow is constantly washed away, and easily causes bridge base
The hanging bridge floor of plinth collapses, to prevent sudden collapsing event, it is necessary to be washed away situation to bridge and timely be understood and slapped
It holds, to targetedly take measures to prevent the generation of safety accident.
Currently, having had about the influence report washed away to pontic very much.But these reports mostly concentrate on prediction mould
The foundation of type, and wash away simulation and hydraulic calculation aspect.These research achievements have great importance for bridge construction, but
It is that it cannot really reflect and actual after bridge construction washes away situation, it is difficult to predict the variation of scouring time and local scouring depth
Journey.Especially it is worth noting that, since pier subsidence influence factor is complicated, especially the violent location of river regime evolution, bridge pier are rushed
Brush exist mutation possibility, therefore only rely on simulated experiment acquisition data may with actually wash away generation gross differences, thus
Risk can not be predicted.
Therefore, develop in view of the above problems it is a kind of can be carried out for the pontic of large bridge Real-time security monitoring and
Pre-warning system is those skilled in the art institute urgent need to solve the problem.
Summary of the invention
Purpose of the utility model is to solve defect existing in the prior art, providing a kind of can effectively carry out bridge pier
The device of scour depth real-time monitoring.
In order to achieve the above object, the utility model provides a kind of bridge pier real-time safety monitoring system, including probing
Frame fixes device, probing frame, simple beam fathometer, fathometer regulating part；Probing frame passes through the fixed device of probing frame and bridge pier phase
Even；Probing frame is hemispherical rack, and medial center has been spirally distributed probing track from the inside to the outside；Probing regulating part includes
Probing motor, sliding block, adjusts connecting rod, fathometer connecting rod at connecting rod；Probing motor is fixed on probing frame, and output shaft is logical
Connecting rod is crossed to be connected with sliding block；The junction of probing motor output shaft and connecting rod is located at the sphere center position of probing frame；Sliding block position
In in probing track；Fathometer connecting rod one end is rotatedly connected with probing frame, and is located at the center position of helical form probing track,
The other end installs simple beam fathometer；The both ends for adjusting connecting rod are rotatedly connected in the middle part of sliding block, fathometer connecting rod respectively.
Wherein, simple beam fathometer is located at lowest water level line or less 0.9-1.1 meter Chu, meets damp face.
By the setting of spiral probing track on probing frame, in conjunction with probing regulating part, simple beam is driven to survey by probing motor
It visits instrument and carries out helical form scanning, the scour depth real-time monitoring in damp face can be effectively met for bridge pier.
The monitoring system settable two, it is located at bridge pier flood tide face and ebb face, more to the monitoring of scour depth
Comprehensively, effectively.
Further, the utility model monitoring system further includes probing frame fastener；Probing frame is tight by the probing frame
Firmware is detachably arranged on the fixed device of probing frame.
Probing frame can be easy to disassemble, is conducive to installation, the disassembly of simple beam fathometer, is convenient for changing, overhauls.
Preferably, probing frame fastener is two, is respectively arranged on probing frame two sides；Each probing frame fastener includes fastening
Adjusting rod, fastening plates, fastening connecting rod and fastening block；The corresponding position of the fixed device of probing frame is equipped with mounting groove；Fastening plates are set
In the opening of corresponding mounting groove, and fastening adjustment hole is equipped at fastening plates center；Fastening adjustment hole is in the shape of a trumpet, flaring side
To towards on the outside of mounting groove；The fastening connecting rod is elastic link, if there are two, it is symmetrical arranged along fastening adjustment hole central axes；
Fastening adjustment bar is that electric telescopic rod is set in corresponding mounting groove, and one end is connected with probing frame fixation device, the other end respectively with
One end of two fastening connecting rods is connected；The other ends of two fastening connecting rods be each passed through fastening adjustment hole stretch out mounting groove it is outer with it is right
The fastening block answered is connected；The inside of fastening block is equipped with binding groove compatible with probing frame.
Pass through fastening adjustment bar and bell mouth shape fastening adjustment hole is combined to realize to the stretching of fastening connecting rod, is achieved in two
A fastening clamping to probing frame fastly.
Further, the fixed device of probing frame includes probing radius adjustment device；Probing radius adjustment device includes support
Contraction pole, probing frame connecting rod, adjusts connecting rod and adjusts cylinder support tube；Cylinder is adjusted to be connected with bridge pier；Probing frame connecting rod is equipped with
Two, one end is equipped with mounting groove, and the other end is connected with one end of support contraction pole；Support the other end and bridge pier phase of contraction pole
Even；Support tube is sheathed on support contraction pole peripheral side, and one end is connected with cylinder output shaft is adjusted；Adjusting connecting rod is two, each to adjust
Connecting rod two end is saved to be connected on the outside of support tube with corresponding probing frame connecting rod respectively.
By probing radius adjustment device can effectively adjust simple beam fathometer with respect to bridge pier probing distance, thus into
The comprehensive facade probing of row bridge pier side scour depth.
Further, the fixed device of probing frame further includes turning to probing mechanism；The adjusting cylinder of probing radius adjustment device
It is connected by turning to probing mechanism with bridge pier with support contraction pole；Probing mechanism is turned to include steering motor, turn to fixed frame, turn
Dynamic connecting rod turns to support frame；Turning to fixed frame is sector, is fixed at the bridge pier surface, flood tide direction, and lower end is equipped with circular arc
Shape sliding slot；Steering motor is stepper motor, is fixed at bridge pier surface, and output shaft is vertically connected with pivot link one end；Turn
Sliding block is equipped in the middle part of dynamic connecting rod, sliding block is located in the arc chute for turning to fixed frame；The other end and steering branch of pivot link
Support is connected；The adjusting cylinder and support contraction pole of probing radius adjustment device are respectively arranged on and turn on support frame.
It is circumferentially rotated, is further increased around bridge pier progress small range by turning to probing mechanism progress simple beam fathometer
Probing range.
Further, the utility model monitoring system further includes control cabinet and remote monitoring platform；Control cabinet is installed on bridge
Pier top portion is connected with detection motor, adjusting cylinder, steering motor, and is connected with remote monitoring Platform communication.By control cabinet into
The control of row system, and can remotely be controled and monitored by remote monitoring platform.
Further, control cabinet includes local data memory, local data processor, controller and local alarm
Device；Controller respectively with detection motor, adjust cylinder, steering motor, local data memory, local data processor, local
Alarm is connected；Remote monitoring platform includes remote data storage device, remote data processor, remote-end alarm device；Remote data
Processor is connected with the controller of remote data storage device, remote-end alarm device and control cabinet respectively.
Processing and monitoring to data are realized by control cabinet and remote monitoring platform, and utilize local alarm and distal end
Alarm realizes real-time monitoring alarming.
The utility model has the advantage that compared with prior art
The utility model can the underwater silt underwashing depth of real-time dynamic monitoring bridge pier, it is real that cooperation rotation obtains space bridge pier
When underwater silt underwashing depth data, cooperation alarm system can Realtime Alerts, while facilitating the peace for carrying out simple beam fathometer
Assembly and disassembly are unloaded；The apparatus structure being related in the utility model is novel, manufacturing cost is moderate, installation is simple, operation stability
With accuracy height.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model bridge pier real-time safety monitoring system；
Fig. 2 is the scheme of installation of simple beam fathometer in Fig. 1；
Fig. 3 is the structural schematic diagram of probing frame fastener in Fig. 2；
Fig. 4 is the structural schematic diagram that probing mechanism is turned in Fig. 1；
Fig. 5 is the connection schematic diagram of probing frame and fathometer regulating part in Fig. 1.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing.
As shown in Figure 1, the utility model bridge pier real-time safety monitoring system include simple beam fathometer 1, control cabinet 2,
Remote monitoring platform 3, probing frame fixed device 4, probing frame 5, fathometer regulating part 6.Control cabinet 2 is installed on pier coping portion, with
The communication of remote control platform 3 is connected.Probing frame 5 is installed on bridge pier surface by the fixed device 4 of probing frame, and is located at lowest water level
At 0.9-1.1 below line meters of position.Simple beam fathometer 1 is set on probing frame 5 by the installation of fathometer regulating part 6.
In conjunction with shown in Fig. 1, Fig. 5, probing frame 5 is hemispherical rack, and medial center has been spirally distributed from the inside to the outside
Probing track 51.Probing regulating part includes probing motor 61, connecting rod 62, sliding block 63, adjusts connecting rod 64, fathometer connecting rod 65；
Probing motor 61 is fixed on probing frame 5, and output shaft is connected by connecting rod 62 with sliding block 63；61 output shaft of probing motor
It is located at the sphere center position of probing frame 5 with the junction of connecting rod 62；Sliding block 63 is located in probing track 51；Fathometer connecting rod 65 1
End is rotatedly connected with probing frame 5, and is located at the center position of helical form probing track 51, and the other end installs simple beam fathometer
1；The both ends for adjusting connecting rod 64 are rotatedly connected in the middle part of sliding block 63, fathometer connecting rod 65 respectively.Probing motor 61 rotates, the company of drive
The sliding of 62 lower end edge probing track 51 of extension bar, connecting rod 62 drives fathometer connecting rod 65 to rotate, so that the simple beam being arranged thereon
Fathometer 1 is strafed in the shape of a spiral within the scope of 0-60 ° of taper.
As shown in Figure 1, Figure 2, the fixed device 4 of probing frame includes probing fastener 7, probing radius adjustment device 8, turns to
Probing mechanism 9.
As shown in Figure 2, Figure 4 shows, probing mechanism 9 is turned to include steering motor 91, turn to fixed frame 92, pivot link 93, turn
To support frame 94, probing mounting rack 95；Turn to fixed frame 92 be sector, by probing mounting rack 95 be fixed at bridge pier surface,
Flood tide direction, lower end are equipped with arc chute 9201；Steering motor 91 is stepper motor, is fixed at bridge pier surface, and export
Axis is vertically connected with 93 one end of pivot link；Sliding block 9301 is equipped in the middle part of pivot link 93, sliding block, which is located at, turns to fixed frame 92
In arc chute 9201；The other end of pivot link 93 is connected with support frame 94 is turned to.It is rotated, is driven by steering motor 91
Pivot link 93 meets the swing in damp face in bridge pier, and by turning to limit of the fixed frame 92 to sliding block 9301, realizes pivot link
93 swing limit and support.
As shown in Fig. 2, probing radius adjustment device 8 includes support contraction pole 81, support tube 82, probing frame connecting rod 83, adjusts
It saves connecting rod 84 and adjusts cylinder 85；Cylinder 85 is adjusted to be connected with bridge pier；There are two probing frame connecting rod 83 is set, one end is equipped with mounting groove
8301, the other end is connected with one end of support contraction pole 81；The other end of contraction pole 81 is supported to be connected with support frame 94 is turned to；Branch
It supports cylinder set 82 and is set to support 81 peripheral side of contraction pole, one end is connected with 85 output shaft of cylinder is adjusted；Adjusting connecting rod 84 is two, respectively
84 both ends of connecting rod are adjusted to be connected on the outside of support tube 81 and corresponding probing frame connecting rod 83 respectively.It adjusts cylinder 85 and is fixed at and turn
To on support frame 94.By adjust cylinder 85 control support tube 82 back-and-forth motion, thus adjust 83 front end of probing frame connecting rod with
The distance between bridge pier.
As shown in Figure 2 and Figure 3, probing frame fastener 7 is two, is respectively arranged on 5 two sides of probing frame；Each probing frame fastener
It include fastening adjustment bar 72, fastening plates 73, fastening connecting rod 74 and fastening block 75；Fastening plates 73 are set to corresponding probing frame connecting rod 83
Mounting groove 8301 opening, and at 73 center of fastening plates be equipped with fastening adjustment hole 76；Fastening adjustment hole 76 is in the shape of a trumpet,
Direction is flared towards 8301 outside of mounting groove；Fastening connecting rod 74 is elastic link, if there are two, along 76 central axes of fastening adjustment hole
It is symmetrical arranged；Fastening adjustment bar 76 is that electric telescopic rod is set in corresponding mounting groove 8301, and one end is connected with probing frame connecting rod 83,
One end that the other end fastens connecting rod 74 with two respectively is connected；The other end of two fastening connecting rods 74 is each passed through fastening adjustment hole
76 stretching mounting grooves 8301 are outer to be connected with corresponding fastening block 75；The inside of fastening block 75 is equipped with compatible with probing frame 5 tight
Gu slot.Fastening connecting rod 74 is tensed by fastening adjustment bar 76, probing frame 5 is tightly clamped between two fastening blocks 75.It needs
When carrying out the disassembly of probing frame 5, fastening adjustment bar 76 loosens, and fastening connecting rod 74 stretches out fastening adjustment hole 76, two 75 pines of fastening blocks
It opens, can conveniently remove maintenance and replacement that probing frame 5 carries out simple beam fathometer 1.
Further monitoring for convenience, and realize risk alarm, control cabinet includes local data memory, local data
Processor, controller and local alarm；Controller is deposited with detection motor, adjusting cylinder, steering motor, local data respectively
Reservoir, local data processor, local alarm are connected；Remote monitoring platform includes remote data storage device, at remote data
Manage device, remote-end alarm device；The remote data processor controller with remote data storage device, remote-end alarm device and control cabinet respectively
It is connected.It is realized by control cabinet and remote monitoring platform to the remote control of total system and the processing of data and monitoring, and
Real-time monitoring alarming is realized using local alarm and remote-end alarm device.
The step of carrying out bridge pier safety real-time monitoring using the utility model monitoring system is as follows:
(1) system is arranged: setting steering motor single revolution angle adjusts cylinder output shaft single contracted length, probing
Motor output shaft revolving speed；
(2) system reset: the sliding block on probing frame is located at the center of helical form probing track, adjusts cylinder and replys original
Position, the pivot link top shoe for turning to probing mechanism are located at the arc chute left end for turning to fixed frame；
(3) spiral probing: steering motor rotation control turns to support frame and is rotated around bridge pier flood tide face；Steering motor
One angle of every rotation adjusts cylinder control probing frame and is extended along support telescopic bar direction；Cylinder output shaft is adjusted often to stretch
Long certain length, the rotation of probing motor drives simple beam fathometer to carry out probing, and controls simple beam fathometer with 12 °/point
Revolving speed is strafed in the shape of a spiral within the scope of 0-60 ° of taper；
(4) radius probing: after single sweep operation, probing motor reversal to simple beam fathometer returns in situ, adjusting cylinder
Continue to extend certain length, the rotation of probing motor drives simple beam fathometer to carry out helical form and strafes；
(5) flood tide face rotates probing: repeating step, ((4) extend until adjusting cylinder to limiting value；Adjust cylinder
Original position is shunk back, step (3), (4) are repeated, until turning to the pivot link top shoe of probing mechanism as steering motor turns
It moves to the arc chute right end of steering fixed frame, adjusting cylinder and extends the scanning of the simple beam fathometer helical form to limiting value
Terminate, carries out the system reset of step (2)；Single probing terminates；
(6) it data storage and processing: acquires each simple beam fathometer and carries out the difference obtained when helical form scanning
Scour depth data carry out real-time monitoring.It acquires each simple beam fathometer and carries out the difference acquired when helical form scanning
Scour depth data, are compared with preset threshold, when being more than preset threshold, by local alarm and remote-end alarm device into
The local and remote alarm of row.
Wherein, high-frequency signal is emitted to the bottom by simple beam fathometer in step (6), signal is after reflection by simple beam
Fathometer receives, and sends and receives the time difference between signal using simple beam fathometer, can calculate and obtain simple beam probing
The depth of water of instrument, to obtain the scour depth of bridge pier a single point.
Further, acquired data storage passes through distant communication line transmission to local data memory to long-range number simultaneously
The data being collected into are compared with preset threshold information according to memory, and in remote data processor, if it exceeds
Threshold value then illustrates security risks occur, which feeds back to controller, and it is dynamic to trigger report teledata alarm sending alarm
Make；If being less than threshold value, illustrate no security risks, which feeds back to controller, and data information only stores, and does not send out
Actuation of an alarm out.
Further, threshold value is provided with prime risk threshold value and second level risk threshold value, when being more than second level risk threshold value, hair
Alarm out issues emergency alarm when being more than prime risk threshold value.
Claims (7)
1. a kind of bridge pier real-time safety monitoring system, it is characterised in that: including probing frame fixed device, probing frame, simple beam
Fathometer, fathometer regulating part；The probing frame is connected by the fixed device of probing frame with bridge pier；The probing frame is hemispherical
Rack, medial center have been spirally distributed probing track from the inside to the outside；The probing regulating part includes probing motor, connection
Bar, adjusts connecting rod, fathometer connecting rod at sliding block；The probing motor is fixed on probing frame, and output shaft by connecting rod with
Sliding block is connected；The junction of the probing motor output shaft and connecting rod is located at the sphere center position of the probing frame；The sliding block
In the probing track；Fathometer connecting rod one end is rotatedly connected with the probing frame, and is located at helical form probing rail
The center position in road, the other end install the simple beam fathometer；It is described adjust connecting rod both ends respectively with sliding block, fathometer
It is rotatedly connected in the middle part of connecting rod.
2. monitoring system according to claim 1, it is characterised in that: the monitoring system further includes probing frame fastener；
The probing frame is detachably arranged on the fixed device of probing frame by the probing frame fastener.
3. monitoring system according to claim 2, it is characterised in that: the probing frame fastener is two, is respectively arranged on
Probing frame two sides；Each probing frame fastener includes fastening adjustment bar, fastening plates, fastening connecting rod and fastening block；The probing
The corresponding position of the fixed device of frame is equipped with mounting groove；The fastening plates are set to the opening of corresponding mounting groove, and in fastening plates
Fastening adjustment hole is equipped at the heart；The fastening adjustment hole is in the shape of a trumpet, is flared direction towards mounting groove outside；The fastening connects
Bar is elastic link, if there are two, it is symmetrical arranged along fastening adjustment hole central axes；The fastening adjustment bar sets for electric telescopic rod
In in corresponding mounting groove, one end is connected with the fixed device of probing frame, and one end that the other end fastens connecting rod with two respectively is connected；Two
The other end of a fastening connecting rod is each passed through the fastening adjustment hole and stretches out outside mounting groove to be connected with corresponding fastening block；It is described tight
Gu the inside of block is equipped with binding groove compatible with the probing frame.
4. monitoring system according to claim 3, it is characterised in that: the fixed device of the probing frame includes probing radius tune
Regulating device；The probing radius adjustment device includes support contraction pole, support tube, probing frame connecting rod, adjusts connecting rod and adjust gas
Cylinder；The adjusting cylinder is connected with bridge pier；There are two the probing frame connecting rod is set, one end be equipped with the mounting groove, the other end with
One end of contraction pole is supported to be connected；The other end of the support contraction pole is connected with bridge pier；The support tube is sheathed on the branch
Contraction pole peripheral side is supportted, one end is connected with cylinder output shaft is adjusted；The adjusting connecting rod is two, each to adjust connecting rod two end difference
It is connected on the outside of support tube with corresponding probing frame connecting rod.
5. monitoring system according to claim 4, it is characterised in that: the fixed device of the probing frame further includes turning to probing
Mechanism；The adjusting cylinder and support contraction pole of the probing radius adjustment device are connected by turning to probing mechanism with bridge pier；Institute
Stating and turning to probing mechanism includes steering motor, steering fixed frame, pivot link, steering support frame；The steering fixed frame is fan
Shape, is fixed at the bridge pier surface, flood tide direction, and lower end is equipped with arc chute；The steering motor is stepper motor, Gu
Surely it is set to the bridge pier surface, and output shaft is vertically connected with described pivot link one end；It is equipped with and slides in the middle part of the pivot link
Block, the sliding block are located in the arc chute for turning to fixed frame；The other end of the pivot link is connected with support frame is turned to；
The adjusting cylinder and support contraction pole of the probing radius adjustment device are respectively arranged on the steering support frame.
6. monitoring system according to claim 5, it is characterised in that: the monitoring system further includes that control cabinet and distal end are supervised
Control platform；The control cabinet is installed on pier coping portion, with the probing motor, adjust cylinder, steering motor and be connected, and with it is described
Remote monitoring Platform communication is connected.
7. monitoring system according to claim 6, it is characterised in that: the control cabinet includes local data memory, sheet
Ground data processor, controller and local alarm；The controller respectively with the probing motor, adjust cylinder, turn to
Motor, local data memory, local data processor, local alarm are connected；The remote monitoring platform includes distal end number
According to memory, remote data processor, remote-end alarm device；The remote data processor respectively with remote data storage device, remote
End alarm is connected with the controller of control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821615821.6U CN209181747U (en) | 2018-09-30 | 2018-09-30 | A kind of bridge pier real-time safety monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821615821.6U CN209181747U (en) | 2018-09-30 | 2018-09-30 | A kind of bridge pier real-time safety monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209181747U true CN209181747U (en) | 2019-07-30 |
Family
ID=67358894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821615821.6U Withdrawn - After Issue CN209181747U (en) | 2018-09-30 | 2018-09-30 | A kind of bridge pier real-time safety monitoring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209181747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238185A (en) * | 2018-09-30 | 2019-01-18 | 江苏省水利科学研究院 | A kind of bridge pier real-time safety monitoring system and monitoring method |
-
2018
- 2018-09-30 CN CN201821615821.6U patent/CN209181747U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238185A (en) * | 2018-09-30 | 2019-01-18 | 江苏省水利科学研究院 | A kind of bridge pier real-time safety monitoring system and monitoring method |
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