CN208818234U - Bridge monitoring sensor on-line calibration measuring system - Google Patents
Bridge monitoring sensor on-line calibration measuring system Download PDFInfo
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- CN208818234U CN208818234U CN201821470114.2U CN201821470114U CN208818234U CN 208818234 U CN208818234 U CN 208818234U CN 201821470114 U CN201821470114 U CN 201821470114U CN 208818234 U CN208818234 U CN 208818234U
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Abstract
The utility model discloses a kind of bridge monitoring sensor on-line calibration measuring systems comprising: installation base plate is rigid plate, and bottom surface is located on bridge structure face；Reference sensor is located on installation base plate top surface in a manner of having common outer source forcing with sensor to be calibrated；Data collecting instrument, with sensor to be calibrated and reference sensor and upper mechatronics the data of two sensors of acquisition are uploaded to host computer；Sensor to be calibrated is arranged on installation base plate top surface.Make reference sensor that can keep similar response when by common source incentive action with sensor to be calibrated through the above technical solution, science is had more to the metering performance judgement of sensor to be calibrated, so that the metering performance that host computer can be handled by the data to two sensors to determine sensor to be calibrated, since sensor to be calibrated is to be calibrated online, solve the problems, such as that sensor to be calibrated can only be calibrated in the case where dismounting is placed on laboratory condition.
Description
Technical field
The utility model belongs to bridge monitoring technical field, in particular to a kind of bridge monitoring sensor on-line calibration is surveyed
Amount system.
Background technique
In the past 30 years, the construction of highway in China infrastructure achieves fast development.Ended for the end of the year 2016, in-service highway bridge
Beam reaches more than 80.5 ten thousand, wherein bridge and grand bridge more than 90,000.The use of new material, new equipment, new construction, new process is
Road and bridge engineering field is filled with new development vitality, also brings many hot issues for needing to study and solve.Wherein,
A series of problems relevant to infrastructure security becomes one of the focus of focus of attention.
It has been studied according to the one of Chinese scholar, between 15 years since this century, China is affected by various factors and collapses
Bridge is up to more than 300 seats, wherein there is 43% cave-in accident to occur in construction period.In terms of analysis data, the bridge of service phase collapsing
Average Years Of Service is about 18.7 in beam, projected life of 50 years or 100 years far less than bridge.
The collapse accident of bridge is derived from the variation of the active state of power.Therefore, the stress of the large scale structures facility such as bridge
State and mechanical characteristic evolving state, all the time just by traffic scientific research institution and administrative department's extensive concern.SHM
(Structural Health Monitoring, monitoring structural health conditions) technology runs shape in the eighties in last century, in bridge
State monitoring aspect is promoted rapidly, and gradually builds BHM (Bridge Health Monitoring, bridge health monitoring)
Technical system.
The characteristics of the long-term, continuous of highway large size SHM system, dynamic monitoring, makes it have monitoring and tests with assessment, design
Card, research and development multi-functional, and widely applied at home, outside and extensive concern.The traceability of data, reliability
It is the basis that SHM system realizes its various function.Therefore, the permanently effective application of highway large scale structure monitoring (detection) system
The reliability service and metering for being faced with sensor are traced to the source problem.Main problem has:
First, SHM system should determine as the application system established on the basis of measurement sensor exports magnitude, sensor
Phase carries out traceability calibration, to guarantee the continuous effective of measurement result, however is only capable of carrying out the static state before sensor installation at present
Calibration.
Second, the sensor for the large scale structures health monitoring such as bridge is usually to monitor increment rather than absolute magnitude, to answer
For power (or strain) sensor, evaluation of structural safety it is contemplated that with a variety of excitation conditions variation, structural stress
The increment of (or strain) relative to original state.It theoretically, is the continuous effective for guaranteeing the measurement of this incremental result, sensing
In use, installation condition should not have any variation to device.But in practical application, the service life of sensor is significantly shorter than bridge
Beam projected life, the continuity of monitoring data is the technical problem that can not avoid after replacing sensor.This process needs profession
Measurement technology is as guarantee.
The development of third, the measurement technologies such as traditional mechanics, length, time constitutes basic branch to engineering metering field
Support, but it is unable to satisfy the measurement technology demand in specific engineer application field.
According to highway large scale structure status monitoring (or detection) practical application request and on-line monitoring (or detection) skill
Art current situation implements the status monitoring (or detection) of life cycle management to large structures such as crucial bridge, roads, is to add
The effective measures that strong basis Infrastructure runs phase risk assessment, ensures user's security of the lives and property, improves large scale structure design scheme.
In conclusion the online traceability calibration problem of sensor in bridge health monitoring system is solved, to guarantee to measure
As a result continuous effective carries out the online dynamic calibration of structure monitoring system, sensor element performance evaluation and fault diagnosis, sensing
The research work that device substitutes the related fieldss such as process Metrology Support theory and technology is extremely urgent.
Since bridge health monitoring system is after coming into operation, sensor disassembly will be unable to guarantee it to bridge state parameter
Continuous monitoring, will no longer be sent to metrological service after the installation of usual sensor and periodically be examined and determine or calibrated.For sensing
The currently used scheme of the metering of device has:
One, the independent measurement Law of sensor:
Before sensor is installed, sensor used in monitoring system is sent to metrological service and is examined and determine or is calibrated.
Examined and determine using this or calibration result as evaluation bridge monitoring system metering performance foundation.During realizing this method, hair
Existing its has the disadvantage that: individually being measured due to that can not remove sensor, so bridge monitoring system can not be realized periodically
The measurement and calibration of sensor.In addition, sensor installation after working environment and installation before compared biggish difference, therefore, pacify
The actual metered performance being not enough in representative sensor use is individually measured before dress.
Two, PCA (multivariate statistical methods such as (Principal Component Analysis, pivot analysis):
The main realization approach of this scheme is to initially set up pca model, selects 3 pivots by PCA, then calculating square
Predict error (SPE) and Hotelling (Hotelling) T2Statistic, if statistic is more than that its control limits, in judgement system
There is sensor fault.During realizing this method, it is found that it has the disadvantage that: due to use PCA to glitch not
Be it is very sensitive, diagnosis the higher monitoring system of precise requirements in, cannot be monitored well.PCA method is only capable of to steady
Process carries out fault diagnosis, and the variable monitored in actual production is often to change.In bridge monitoring system containing compared with
The sensor of multiple types needs to spend biggish workload to all types of sensors creation pca model.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of bridge monitoring sensor on-line calibration measurement system
System comprising: installation base plate, is rigid plate, and the bottom surface of the installation base plate is arranged on bridge structure face；Reference sensor,
It is arranged on the top surface of the installation base plate in a manner of there is common outer source forcing with sensor to be calibrated；It is acquired with data
Instrument, the sensor to be calibrated with the sensor to be calibrated and the reference sensor and upper mechatronics will acquire
The host computer is uploaded to the data of the reference sensor；Wherein, the sensor to be calibrated is arranged in the installation base
On the top surface of plate.
In measuring system as described above, it is preferable that the reference sensor with the sensor to be calibrated side by side
Mode be mounted on the bridge structure face for belonging to same monitoring point.
In measuring system as described above, it is preferable that the sensor to be calibrated and reference sensor are that stress passes
Sensor, the measuring system further include: the first displacement slide unit；The upper layer sliding block of the first displacement slide unit and the reference sense
Device is fixedly connected, and lower layer's pedestal of the first displacement slide unit is fixedly connected with the top surface of the installation base plate.
In measuring system as described above, it is preferable that the measuring system further include: second displacement slide unit；Described
The upper layer sliding block of two displacement slide units is fixedly connected with new sensor, lower layer's pedestal of the second displacement slide unit and the installation base
Plate is fixedly connected；Wherein, the new sensor is for replacing the sensor to be calibrated.
In measuring system as described above, it is preferable that the data collecting instrument is divided into the first data collecting instrument and second
Data collecting instrument；First data collecting instrument is electrically connected with the sensor to be calibrated, also with the upper mechatronics；Institute
The second data collecting instrument is stated to be electrically connected with the reference sensor, also with the upper mechatronics.
Technical solution provided by the embodiment of the utility model has the benefit that
By the way that installation base plate is arranged, its top surface is provided with sensor to be calibrated, and by reference sensor with it is to be calibrated
There is sensor the mode of common outer source forcing to be arranged on the top surface of installation base plate, by sensor to be calibrated and with reference to sensing
Device is electrically connected with the data collecting instrument with upper mechatronics respectively, so that reference sensor and sensor to be calibrated are by altogether
Source forcing can keep similar response when acting on, and have more science to the metering performance judgement of sensor to be calibrated, and then make
Obtaining host computer can be handled by the data to reference sensor and sensor to be calibrated to determine sensor to be calibrated
Metering performance, since sensor to be calibrated is to be calibrated online, reality can only be placed in dismounting by solving sensor to be calibrated
Test the problem calibrated under the conditions of room.
Detailed description of the invention
Fig. 1 is a kind of structure of bridge monitoring sensor on-line calibration measuring system provided by the embodiment of the utility model
Schematic diagram；
Fig. 2 is that a kind of reference sensor provided by the embodiment of the utility model is installed with sensor to be calibrated with conjugated manner
Structural schematic diagram；
Fig. 3 is a kind of installation process schematic diagram for replacing sensor to be calibrated provided by the embodiment of the utility model；
Fig. 4 is a kind of reference sensor provided by the embodiment of the utility model and the first slide unit, installation base plate, bridge structure
Structural schematic diagram；
Wherein, symbol description is as follows in figure:
1 installation base plate, 2 reference sensors, 3 bridge structures, 4 sensors to be calibrated, 51 first data collecting instruments, 52 second
Data collecting instrument, 6 host computers, 7 first slide units, 8 new sensors, 9 second slide units.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to Fig. 1~4, the utility model embodiment provides a kind of bridge monitoring sensor on-line calibration measurement system
System comprising: installation base plate 1, reference sensor 2 and data collecting instrument.
Installation base plate 1 is rigid plate, and bottom surface is arranged on the monitoring surface (i.e. monitored structure) of bridge structure 3.Installation
Substrate 1 is used to provide unified installation foundation for sensor 4 to be calibrated, reference sensor 2 and new sensor 8, before keeping
State the data consistency that sensor measures.The material of installation base plate 1 can be metal, such as steel.Installation base plate 1 is arranged in bridge knot
Mode on structure face can be with are as follows: mounting hole is provided on installation base plate 1, in monitoring surface (or the bridge structure of bridge structure 3
Face) on be also equipped with mounting hole, by the way that screw is sequentially screwed into two mounting holes, so that installation base plate 1 is fixed on bridge knot
On the monitoring surface of structure 3；It can be with are as follows: installation base plate 1 is bonded on bridge structure face；When bridge structure 3 is steel construction, again
It can be with are as follows: installation base plate 1 is arranged in by welding on bridge structure face.
Sensor 4 to be calibrated is the sensor for needing to carry out metering performance calibration after a period of use, and setting is being installed
On the top surface of substrate 1.Reference sensor 2 and sensor 4 to be calibrated are one species sensor, with sensor 4 to be calibrated
Mode (or mode of conjugation installation) with common outer source forcing is arranged on the top surface of installation base plate 1.Specifically, such as
It is mounted on the mode of sensor 4 to be calibrated side by side and belongs to same monitoring point (or with same orientation, to the progress of same characteristic parameter
Monitoring) bridge structure face on so that two sensors can dynamic, synchronous, the lasting same time-varying of survey magnitude,
I.e. when by common source incentive action, two sensors can keep similar response.This measuring system has been particularly suitable for direction
It is required that sensor, such as strain gauge (or strain transducer), obliquity sensor, laser displacement gauge, wherein strain gauge be used for steel
Structure or concrete structural surface stress-strain measurement can be type vibration wire surface strain meter, can also be resistance-strain type surface
Strain gauge；Obliquity sensor is for measuring steel construction or concrete structure tilt angle；Laser displacement gauge is for steel construction or mixes
Xtah Crude Clay structure specific position displacement measurement.When sensor 4 to be calibrated is the sensor for having direction to require, in installation reference sensor
It need to be installed along Impact direction same as sensor 4 to be calibrated when 2.It is strain sensing that Fig. 2, which illustrates sensor 4 to be calibrated,
When device, the mounting means of reference sensor 2.When sensor 4 to be calibrated is obliquity sensor, the established angle of reference sensor 2
Degree need to be consistent with the setting angle of sensor 4 to be calibrated.It should be noted that reference sensor 2 usually selects metering performance steady
It is fixed, and by the high-precision sensor of magnitude tracing, precision can be higher than the precision of sensor 4 to be calibrated.
Data collecting instrument is electrically connected to be calibrated will acquire with sensor 4 to be calibrated and reference sensor 2 and host computer 6
The data of sensor 4 and reference sensor 2 are uploaded to host computer 6.Host computer 6 can judge sensor 4 to be calibrated according to data
Metering performance whether meet expected requirement.It specifically, can be according to the sampled value of the reference sensor of acquisition and to school
The sampled value of quasi- sensor obtains test synchronization discrepancy score value, then according to test synchronization discrepancy score value and the instruction pre-established
Practice the mapping relations for using synchronization discrepancy score value and bridge machinery sensor element performance, determines the metering performance of sensor to be calibrated.
The utility model is provided with sensor 4 to be calibrated by setting installation base plate 1, in its top surface, and will be with reference to sensing
Device 2 is arranged on the top surface of installation base plate 1 in a manner of having common outer source forcing with sensor 4 to be calibrated, will be to be calibrated
The data collecting instrument electrical connection that sensor 4 and reference sensor 2 are electrically connected with host computer 6 respectively, so that 2 He of reference sensor
Sensor 4 to be calibrated can keep similar response when by common source incentive action, sentence to the metering performance of sensor 4 to be calibrated
It is disconnected to have more science, so that host computer 6 can be carried out by the data to reference sensor 2 and sensor to be calibrated 4
Processing is to determine that the metering performance of sensor 4 to be calibrated is solved since sensor 4 to be calibrated is to be calibrated online to school
The problem that quasi- sensor 4 can only be calibrated in the case where dismounting is placed on laboratory condition.
When sensor 4 to be calibrated and reference sensor 2 are strain gauge, due to strain transducer (biography to be calibrated
Sensor) it can be changed when in use by external drive, in order to improve the accuracy that metering performance determines, measuring system is also wrapped
Include: first displacement slide unit 7, be used for adjust be applied to reference sensor 2 pretightning force so that the output valve of reference sensor 2 with
The output valve of sensor 4 to be calibrated is consistent, and the output valve of two reference sensors can be checked by host computer 6.Specifically,
The upper layer sliding block of one displacement slide unit 7 is fixedly connected with reference sensor 2, the lower layer's pedestal and installation base plate 1 of the first displacement slide unit 7
Top surface be fixedly connected.
Measurement data is uploaded to host computer 6 in measuring system, host computer 6 judges the metering performance of 4 devices of sensing to be calibrated
After not meeting requirement, sensor 6 to be calibrated need to be stopped using, and removed, then be replaced with new sensor 8.
In order to adjust the consistency of new sensor 8 Yu 4 data of sensor to be calibrated, keep monitoring process continuously controllable, measuring system is also wrapped
Include: second displacement slide unit 9 is used to adjust the pretightning force for being applied to new sensor 8 output valve and reference so that new sensor 8
The output valve of sensor 2 is consistent.Specifically, the upper layer sliding block of second displacement slide unit 9 is fixedly connected with new sensor 8, second
The lower layer's pedestal for moving slide unit 9 is fixedly connected with the top surface of installation base plate 1.
It should be understood that the upper layer sliding block of the first displacement slide unit 7 and second displacement slide unit 9 can be relative to lower layer's pedestal
It is slided on (vertical direction of Fig. 2) in the axial direction of sensor, guide rail such as is set between upper layer sliding block and lower layer's pedestal, led to
The regulation handle (or jackscrew) for overregulating displacement slide unit changes the pre-strained state of displacement slide unit." two output valves are consistent " can be with
It is the same size of two output valves, is also possible in the range of predetermined deviation, the present embodiment is to this without limiting.
Fig. 3 illustrates the installation process of new sensor (or sensor to be replaced) 8, wherein figure (a) is biography to be calibrated
The working state schematic representation of sensor 4, figure (b) are the scheme of installation of reference sensor 2；Scheming (c) is to remove sensor 4 to be calibrated
Schematic diagram afterwards；Figure (d) is the schematic diagram replaced after new sensor 8；Figure (e) is the schematic diagram removed after reference sensor 2, figure
Middle symbol 1 indicates that installation base plate, sensor are mounted on bridge structure face by installation base plate 1.
Data collecting instrument is divided into the first data collecting instrument 51 and the second data collecting instrument 52.First data collecting instrument 51 with to
The electrical connection of calibration sensor 4 is also electrically connected with host computer 6 with acquiring the data of sensor 4 to be calibrated with by sensor 4 to be calibrated
Data be uploaded to host computer 6.Second data collecting instrument 52 is electrically connected to acquire the number of reference sensor 2 with reference sensor 2
According to being also electrically connected with host computer 6 so that the data of reference sensor 2 are uploaded to host computer 6.Since live bridge is usually mounted with
Bridge health monitoring system, the system include monitoring system data acquisition instrument, are used to obtain the number of sensor acquisition to be calibrated
According to that is, it is the first data collecting instrument 51 above-mentioned, and the data that will acquire are uploaded to host computer 6.Second data collecting instrument 52
Portable data acquisition instrument can be used.
In conclusion the utility model embodiment bring has the beneficial effect that:
By the way that installation base plate is arranged, its top surface is provided with sensor to be calibrated, and by reference sensor with it is to be calibrated
There is sensor the mode of common outer source forcing to be arranged on the top surface of installation base plate, by sensor to be calibrated and with reference to sensing
Device is electrically connected with the data collecting instrument with upper mechatronics respectively, so that reference sensor and sensor to be calibrated are by altogether
Source forcing can keep similar response when acting on, and have more science to the metering performance judgement of sensor to be calibrated, and then make
Obtaining host computer can be handled by the data to reference sensor and sensor to be calibrated to determine sensor to be calibrated
Metering performance, since sensor to be calibrated is to be calibrated online, reality can only be placed in dismounting by solving sensor to be calibrated
Test the problem calibrated under the conditions of room.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature
Scheme is applied to realize.Therefore, embodiment disclosed above, in all respects are merely illustrative, and are not only
's.All changes that come within the scope of the invention or equivalents of the invention are by the utility model packet
Contain.
Claims (5)
1. a kind of bridge monitoring sensor on-line calibration measuring system, which is characterized in that the measuring system includes:
Installation base plate, is rigid plate, and the bottom surface of the installation base plate is arranged on bridge structure face；
The top of the installation base plate is arranged in reference sensor in a manner of having common outer source forcing with sensor to be calibrated
On face；With
Data collecting instrument, will be acquired with the sensor to be calibrated and the reference sensor and upper mechatronics described in
The data of sensor to be calibrated and the reference sensor are uploaded to the host computer；
Wherein, the sensor to be calibrated is arranged on the top surface of the installation base plate.
2. measuring system according to claim 1, which is characterized in that the reference sensor with the sensing to be calibrated
The mode of device side by side is mounted on the bridge structure face for belonging to same monitoring point.
3. measuring system according to claim 1, which is characterized in that the sensor to be calibrated and reference sensor are
Strain gauge, the measuring system further include: the first displacement slide unit；
The upper layer sliding block of the first displacement slide unit is fixedly connected with the reference sensor, the lower layer of the first displacement slide unit
Pedestal is fixedly connected with the top surface of the installation base plate.
4. measuring system according to claim 3, which is characterized in that the measuring system further include: second displacement slide unit；
The upper layer sliding block of the second displacement slide unit is fixedly connected with new sensor, lower layer's pedestal of the second displacement slide unit with
The top surface of the installation base plate is fixedly connected；
Wherein, the new sensor is for replacing the sensor to be calibrated.
5. measuring system according to claim 1, which is characterized in that the data collecting instrument is divided into the first data collecting instrument
With the second data collecting instrument；
First data collecting instrument is electrically connected with the sensor to be calibrated, also with the upper mechatronics；
Second data collecting instrument is electrically connected with the reference sensor, also with the upper mechatronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470114.2U CN208818234U (en) | 2018-09-10 | 2018-09-10 | Bridge monitoring sensor on-line calibration measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470114.2U CN208818234U (en) | 2018-09-10 | 2018-09-10 | Bridge monitoring sensor on-line calibration measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208818234U true CN208818234U (en) | 2019-05-03 |
Family
ID=66276465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821470114.2U Expired - Fee Related CN208818234U (en) | 2018-09-10 | 2018-09-10 | Bridge monitoring sensor on-line calibration measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208818234U (en) |
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2018
- 2018-09-10 CN CN201821470114.2U patent/CN208818234U/en not_active Expired - Fee Related
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Granted publication date: 20190503 Termination date: 20190910 |