CN212058680U - Concrete strain data monitoring system - Google Patents
Concrete strain data monitoring system Download PDFInfo
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- CN212058680U CN212058680U CN202020253998.7U CN202020253998U CN212058680U CN 212058680 U CN212058680 U CN 212058680U CN 202020253998 U CN202020253998 U CN 202020253998U CN 212058680 U CN212058680 U CN 212058680U
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- 238000005259 measurement Methods 0.000 claims description 5
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Abstract
The utility model discloses a concrete strain data monitoring system, which belongs to the technical field of concrete buildings and comprises a sensor subsystem, a data acquisition and transmission subsystem and a monitoring platform; the sensor subsystem selects the concrete embedded vibrating string type sensor as an ultra-long concrete strain test element, when the stress in the tested structure changes, the concrete embedded vibrating string type sensor synchronously senses deformation, the control from the casting time source parameter of the post-cast strip, namely the concrete shrinkage condition is realized, the safety factor selection of projects given by designers can be reduced, the project construction period is shortened, meanwhile, the equipment measures can be turned over as soon as possible, the total construction cost of the project is reduced, and the quality control and the application of the post-cast strip are promoted.
Description
Technical Field
The utility model relates to a concrete building technical field specifically is a concrete strain data monitoring system.
Background
With the development of modern structures towards larger, taller and longer dimensions, ultra-long concrete structures and mass concrete technologies are certainly being adopted on a large scale. In order to control the structure to have no obvious cracks in the concrete construction process, the post-cast strip is widely applied, but the casting quality of the post-cast strip becomes a problem of wide attention of an ultra-long concrete structure. The method adopts multiple advanced means such as Internet of things, wireless transmission, cloud platforms and the like, realizes control from the source parameter of the post-cast strip casting time, namely the concrete shrinkage condition, can reduce the safety factor selection given to projects by designers, reduce the construction period, simultaneously can carry out turnover equipment measures as soon as possible, reduce the overall construction cost of the project, promote the quality control and application of the post-cast strip, and enrich the weapon storeroom of large-volume concrete structure construction.
With the development of social economy, the application of the ultra-long concrete structure in China is more and more, and due to the requirement on building functions, the structure is required to be provided with few or even no deformation joints. The post-cast strip has been widely applied to actual structures as a commonly used method for compensating shrinkage strain of ultra-long concrete, but the technical application of the post-cast strip is ahead of theoretical analysis throughout the whole building field. This directly results in that many technical key nodes of the post-cast strip of the engineering project are selected by adding the relaxation requirements to the statistical data, and the relevant key parameters are not controlled, so that the control efficiency is reduced, and many unnecessary cost investments are increased, such as delay of construction period, increase of measure cost, increase of site occupation cost and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide a concrete strain data monitoring system to reach the mesh to engineering project post-cast strip concrete strain data real-time detection.
For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:
a concrete strain data monitoring system comprises a sensor subsystem, a data acquisition and transmission subsystem and a monitoring platform; wherein,
the sensor subsystem selects a concrete embedded vibrating wire type sensor as an overlong concrete strain test element;
the data acquisition and transmission subsystem comprises a data transmission cable/optical cable, a digital-to-analog conversion card and a matched demodulator, and the matched demodulator is matched with the sensor subsystem and used for acquiring data of the sensor subsystem in a wireless transmission mode.
The monitoring platform is electrically connected with the matched demodulator and used for receiving data acquired by each concrete embedded vibrating wire sensor in real time and uploading the data to the cloud service data center, and the monitoring platform completes analysis and evaluation of the data according to a large amount of received data.
Preferably, a steel pipe is sleeved on an outgoing line of the concrete embedded type vibrating wire sensor, and foam cotton is adjusted outside the steel pipe.
Preferably, the matched demodulator selects a BGK-MICRO-40 automatic data acquisition instrument-distributed network measurement system.
Preferably, the device further comprises a test block detection system, wherein the test block is a concrete structure with the thickness of 100 multiplied by 300mm, and two concrete embedded vibrating wire sensors are distributed in each test block.
Compared with the prior art: the utility model discloses a thing networking, wireless transmission, multiple advanced means such as cloud platform, utilize concrete to bury formula vibrating wire formula sensor and BGK-MICRO-40 automatic data acquisition appearance-distributed network measurement system etc. and realized pouring the area after that pouring time source parameter-the concrete shrinkage condition is controlled, this can reduce the designer and give the factor of safety of project and select, reduce the engineering time limit for a project, turnover equipment measure as early as possible simultaneously, reduce engineering overall cost, promote the quality control and the application in area after pouring, enrich the weapon storehouse of bulky concrete structure construction. The prestressed concrete can also be applied to many new fields of high-rise, large-span, heavy-load and anti-seismic structures and the like which adopt the prestress technology.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor. Wherein:
fig. 1 is a block diagram illustrating the structure of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of explanation, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the utility model provides a concrete strain data monitoring system, which comprises a sensor subsystem, a data acquisition and transmission subsystem and a monitoring platform; wherein,
the sensor subsystem selects a concrete embedded vibrating wire type sensor as an ultra-long concrete strain test element, when the stress in the tested structure changes, the concrete embedded vibrating wire type sensor synchronously senses the deformation, the deformation is transmitted to a vibrating wire through a front end seat and a rear end seat and is converted into the change of the stress of the vibrating wire, so that the vibration frequency of the vibrating wire is changed, the electromagnetic coil excites the vibrating wire and measures the vibration frequency of the vibrating wire, and a frequency signal is transmitted to a reading device through a cable, so that the strain in the tested structure can be measured;
the data acquisition and transmission subsystem comprises a data transmission cable/optical cable, a digital-to-analog conversion card and a matched demodulator, and the matched demodulator is matched with the sensor subsystem and used for acquiring data of the sensor subsystem in a wireless transmission mode.
The monitoring platform is electrically connected with the matched demodulator and used for receiving data acquired by each concrete embedded vibrating wire sensor in real time and uploading the data to the cloud service data center, and the monitoring platform completes analysis and evaluation of the data according to a large amount of received data.
And a steel pipe is sleeved on a lead-out wire of the concrete embedded type vibrating wire sensor, and foam cotton is adjusted outside the steel pipe.
The matched demodulator selects a BGK-MICRO-40 automatic data acquisition instrument-distributed network measurement system.
The device also comprises a test block detection system, wherein the test block is of a concrete structure of 100 multiplied by 300mm, and two concrete embedded vibrating wire sensors are distributed in each test block.
In the specific implementation
Step 1: and compiling a concrete shrinkage strain monitoring scheme. And determining main parameters of the concrete shrinkage strain monitoring work of the project according to the analysis result of the special scheme for the ultra-long concrete construction. Then, considering influence factors such as site conditions, construction progress, personnel configuration and the like in detail, and compiling a concrete strain monitoring scheme, wherein the concrete strain monitoring scheme mainly comprises relevant necessary measures such as monitoring system layout position, instrument and equipment optimization, installation notice, personnel configuration, equipment configuration, environmental protection and the like, and compiling special monitoring software suitable for the project;
step 2: the monitoring sensor is preferred, the concrete strain monitoring sensor and a matched demodulator are used integrally, the construction process and the construction period of the original concrete are not changed in the closed construction method of the post-shrinkage casting belt based on the concrete strain monitoring data, and only part of the time and the position are finely adjusted, specifically the following steps are carried out:
1, in-situ laying: arranging sensors for monitoring concrete strain according to the design position of the monitoring scheme, wherein the arrangement position is positioned by taking the position of a reinforced concrete structure reinforcement cage as a support and binding wires;
2, protecting an outgoing line: fully protecting the leading-out wire of the sensor for monitoring the concrete strain by adopting a method of matching a steel pipe with foam cotton for protection;
3, concrete test block retention: a concrete solid block with the size of 100 multiplied by 300mm is reserved on the section of each post-cast strip, and the test block and the post-cast strip are simultaneously poured with the same material and maintained under the same condition;
and 4, laying concrete test block sensors: two sensors for monitoring concrete strain are distributed in each test block and used for acquiring the shrinkage condition of the concrete material and determining the material performance.
And step 3: system integration and data acquisition
1 Integrated Wiring
1) The wiring on the ground is carried out according to the comprehensive wiring scheme of the measurement and control system, and when all the line grooves (or overhead equipment) are led to the ground from high altitude, the lines are wired along the surface of the on-site structural member as much as possible;
2) the data line penetrates through the sleeve and is gathered at a data acquisition position, the line walking is carried out by adopting a wire groove of weak current engineering as much as possible, and the wire groove is laid automatically when necessary;
3) the wiring target should be long-life, short-distance, and have no influence on other structures.
And 4, step 4: data acquisition requirements
1) Selecting a matched demodulator for monitoring according to a design scheme, and matching the demodulator with a sensor for monitoring the concrete strain;
2) debugging and data recording of the instrument are carried out according to the mode, the method and the environment specified by an instrument manufacturer;
3) before data acquisition, printing a record form according to the proposed data form and quantity;
4) and recording data according to the monitoring scheme, filling auxiliary files such as a recorder, recording time, a log and the like, and providing a basis for later data analysis and use.
And 5: determining post-cast strip closure time
1, when a system needs to be powered on site in the application process, a project related worker is informed in advance to prepare and debug a needed power supply device;
2, the monitoring system has an uninterrupted power function and is started when the field instrument is powered off, so that the monitoring system is prevented from stopping working;
3 the monitoring system should have the function of power-off alarm and timely inform personnel of repair
4 implementation steps of monitoring system
The method comprises the following specific implementation steps that the post-cast strip pouring time is determined on the construction site as the core work of the closed construction method of the contracted post-cast strip based on the concrete strain monitoring data:
the method comprises the following steps: arranging sensors in the concrete structure in situ and in the test piece in the design scheme;
step two: a matched demodulator is adopted to carry out data real-time acquisition on the sensor, and the acquisition frequency is about 10min once;
step three: when the shrinkage strain of the in-situ concrete is stable and the value of the shrinkage strain is 60% of the total shrinkage of the material, and the minimum closing time of the post-cast strip reaching the specification is the final post-cast strip closing and pouring time of the project.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (4)
1. A concrete strain data monitoring system is characterized in that: the system comprises a sensor subsystem, a data acquisition and transmission subsystem and a monitoring platform; wherein,
the sensor subsystem selects a concrete embedded vibrating wire type sensor as an overlong concrete strain test element;
the data acquisition and transmission subsystem comprises a data transmission cable/optical cable, a digital-to-analog conversion card and a matched demodulator, and the matched demodulator is matched with the sensor subsystem and used for acquiring data of the sensor subsystem in a wireless transmission mode;
the monitoring platform is electrically connected with the matched demodulator and used for receiving data acquired by each concrete embedded vibrating wire sensor in real time and uploading the data to the cloud service data center, and the monitoring platform completes analysis and evaluation of the data according to a large amount of received data.
2. The concrete strain data monitoring system of claim 1, wherein: and a steel pipe is sleeved on a lead-out wire of the concrete embedded type vibrating wire sensor, and foam cotton is adjusted outside the steel pipe.
3. The concrete strain data monitoring system of claim 1, wherein: the matched demodulator selects a BGK-MICRO-40 automatic data acquisition instrument-distributed network measurement system.
4. The concrete strain data monitoring system of claim 1, wherein: the device also comprises a test block detection system, wherein the test block is of a concrete structure of 100 multiplied by 300mm, and two concrete embedded vibrating wire sensors are distributed in each test block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020253998.7U CN212058680U (en) | 2020-03-04 | 2020-03-04 | Concrete strain data monitoring system |
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| CN202020253998.7U CN212058680U (en) | 2020-03-04 | 2020-03-04 | Concrete strain data monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432525A (en) * | 2021-06-15 | 2021-09-24 | 太原理工大学 | Preparation method and use method of sensor for monitoring deformation of anchor rod in real time |
| CN113514328A (en) * | 2021-04-22 | 2021-10-19 | 中煤科工集团重庆研究院有限公司 | Embedded type penetrated concrete wireless stress-strain monitoring and alarming system |
| CN114965968A (en) * | 2022-04-20 | 2022-08-30 | 四川省建筑科学研究院有限公司 | Monitoring system for obtaining internal parameters of mass concrete |
| CN115217334A (en) * | 2022-06-14 | 2022-10-21 | 中建宏达建筑有限公司 | Construction method for solving problem of early sealing post-cast strip of ultra-long concrete structure |
| CN115308395A (en) * | 2022-07-14 | 2022-11-08 | 武汉三源特种建材有限责任公司 | Method for testing expansibility of underground engineering concrete structure doped with expanding agent |
-
2020
- 2020-03-04 CN CN202020253998.7U patent/CN212058680U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514328A (en) * | 2021-04-22 | 2021-10-19 | 中煤科工集团重庆研究院有限公司 | Embedded type penetrated concrete wireless stress-strain monitoring and alarming system |
| CN113432525A (en) * | 2021-06-15 | 2021-09-24 | 太原理工大学 | Preparation method and use method of sensor for monitoring deformation of anchor rod in real time |
| CN114965968A (en) * | 2022-04-20 | 2022-08-30 | 四川省建筑科学研究院有限公司 | Monitoring system for obtaining internal parameters of mass concrete |
| CN115217334A (en) * | 2022-06-14 | 2022-10-21 | 中建宏达建筑有限公司 | Construction method for solving problem of early sealing post-cast strip of ultra-long concrete structure |
| CN115217334B (en) * | 2022-06-14 | 2024-04-02 | 中建宏达建筑有限公司 | Construction method for solving problem of pre-closing post-pouring belt of ultra-long concrete structure |
| CN115308395A (en) * | 2022-07-14 | 2022-11-08 | 武汉三源特种建材有限责任公司 | Method for testing expansibility of underground engineering concrete structure doped with expanding agent |
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