CN206638619U - A kind of age of concrete real-time monitoring system - Google Patents
A kind of age of concrete real-time monitoring system Download PDFInfo
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- CN206638619U CN206638619U CN201720342058.3U CN201720342058U CN206638619U CN 206638619 U CN206638619 U CN 206638619U CN 201720342058 U CN201720342058 U CN 201720342058U CN 206638619 U CN206638619 U CN 206638619U
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- age
- concrete
- monitoring system
- time monitoring
- metal electrode
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Abstract
A kind of age of concrete real-time monitoring system, including power supply, digital voltmeter, digital electronic ammeter and metal electrode, the both positive and negative polarity of power supply are connected by wire and two metal electrodes in outside, and digital electronic ammeter is provided between metal electrode and power supply；The positive terminals of digital voltmeter are connected with two metal electrodes of inner side respectively with negative terminals by wire, metal electrode it is embedded with concrete sample；The digital voltmeter and digital electronic ammeter are electrically connected with the controller.The utility model provides a kind of age of concrete real-time monitoring system, convenient, practical, accuracy is high, can monitor the age of concrete in real time.
Description
Technical field
Concrete monitoring technical field is the utility model is related to, particularly a kind of age of concrete real-time monitoring system.
Background technology
Concrete has become one of the present age most important civil engineering material due to good compression strength after its hardening.
Under conditions of standard curing, concrete strength will continue to develop with the growth of age, the development of concrete strength substantially with
The common logarithm of its age is proportional (age is no less than 3d).Standard curing Under Concrete is understood by testing detection
Design strength is basically reached in 28d, and the strength grade of concrete is determined according to 28d compression strength.Yet with engineering construction
The complexity of natural conditions, especially in temperature relatively low winter, it is generally difficult to ensure that concrete is conserved at the standard conditions,
The age of concrete is caused design strength and to be unsatisfactory for requiring when reaching 28d, so as to be difficult to determine when it reaches design strength.It is mixed
Hydration reaction constantly occurs in age propagation process for solidifying soil, causes that it is constantly hardened and water content gradually decreases, so as to electricity
Resistance constantly increase, resistivity reduce therewith.Therefore concrete also differs in the resistivity corresponding to different larval instar, by resistivity
It is feasible in theory to determine its age.
At present, domestic and foreign scholars have carried out many researchs to concrete bearing intension testing method.Mainly there are Specimen Method, resilience
Method, core drilling method, pulling out method and ultrasonic method etc..The principle of Specimen Method is to meet that the concrete sample of 28 days deploys to maintenance duration
Compression strength is tested, so as to draw its actual strength.The shortcomings that this detection method is during test specimen is made can be because
Cause to slip up for several factors, cause test specimen unqualified and influence measurement accuracy.Rebound method is the weight by being connected with spring
Hammer produces shock with concrete surface, and concrete hardness is calculated by recoil of spring value.The shortcomings that this detection method, is to work as
The precision of measurement can be influenceed in the case of concrete surface hardness and Strength Mass there is some difference property.Core drilling method it is main
Principle is that core boring sampling is carried out on concrete structure, and compression test is carried out after then necessarily being handled.The master of this method
Want shortcoming to be that labor intensity is relatively large, concrete structure is tended to cause internal injury.Pulling out method is in concrete
Bolt is embedded in structure, by the way that bolt is extracted into power used to calculate concrete strength.The shortcomings that this method, is equally
Concrete component can be caused necessarily to damage.Supercritical ultrasonics technology is according to propagation parameter of the ultrasonic wave in concrete component and its change
Law calculates inside concrete intensity.The shortcomings that this method, is that ultrasonic technology is also immature, the accuracy of measurement
It is not high.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of age of concrete real-time monitoring system, convenient, real
With property is strong, accuracy is high, the age of concrete can be monitored in real time.
In order to solve the above technical problems, technical scheme is used by the utility model：A kind of age of concrete supervises in real time
Examining system, including power supply, digital voltmeter, digital electronic ammeter and metal electrode, the both positive and negative polarity of power supply pass through wire and outside
Two metal electrode connections, are provided with digital electronic ammeter between metal electrode and power supply；The positive terminals of digital voltmeter are with bearing
Terminals are connected with two metal electrodes of inner side respectively by wire, metal electrode it is embedded with concrete sample；The number
Word voltmeter and digital electronic ammeter are electrically connected with the controller.
Preferably, the linear type of the metal electrode, is embedded in concrete sample at a distance of 0.5m.
Preferably, the depth that the metal electrode is embedded in concrete sample is the half of its length.
Preferably, the controller is connected with client computer.
Preferably, the controller is connected by RS485 communication interfaces with client computer.
Preferably, it is described to be connected by wireless communication module with client computer.
Preferably, the wireless communication module is 4G wireless communication modules or ZigBee wireless communication modules.
The utility model provides a kind of age of concrete real-time monitoring system, can monitor under any non-standard curing condition
The age of concrete, so as to judge whether concrete sample reaches design strength, so as to for test specimen can form removal, load provide according to
According to.The utility model have it is convenient, practical, accuracy is high, can real-time monitoring and other advantages, to coagulation suitable for engineering
The monitoring of native age.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structured flowchart of the utility model control system；
In figure：Power supply 1, digital voltmeter 2, wire 3, metal electrode 4, concrete sample 5, digital electronic ammeter 6, controller
7。
Embodiment
As shown in Figure 1-2, a kind of age of concrete real-time monitoring system, including power supply 1, digital voltmeter 2, digital current
Table 6 and metal electrode 4, the both positive and negative polarity of power supply 1 are connected by wire 3 with two metal electrodes 4 in outside, metal electrode 4 with
Digital electronic ammeter 6 is provided between power supply 1；The positive terminals of digital voltmeter 2 and negative terminals by wire 3 respectively with inner side
Two metal electrodes 4 connect, metal electrode 4 it is embedded with concrete sample 5；The digital voltmeter 2 and digital electronic ammeter 6 with
Controller 7 electrically connects.
Preferably, the 4 linear type of metal electrode, is embedded in concrete sample 5 at a distance of 0.5m.
Preferably, the depth that the metal electrode 4 is embedded in concrete sample 5 is the half of its length.
Preferably, the controller 7 is connected with client computer.
Preferably, the controller 7 is connected by RS485 communication interfaces with client computer.
Preferably, it is described to be connected by wireless communication module with client computer.
Preferably, the wireless communication module is 4G wireless communication modules or ZigBee wireless communication modules.
Preferably, the 4G wireless communication modules can use LM9105 4G modules, and the ZigBee wireless communication modules can
Using the ZigBee wireless communication modules based on CC2530 chips, the controller can use STM32 series monolithics.
Comprise the following steps during use：Step 1：Four metal electrodes, metal electrode are embedded on concrete sample to be measured
Between be embedded to gauged distance, length of embedment be electrode length half.Pole layout is disposably completed, and is reduced because of electrode
Arrange and caused failure and interference.Direct current is powered to form artificial direct current by two, outside electrode to concrete sample
Electric field, the interelectrode potential difference of electric current and inner side two in measuring circuit, and by result of detection input data acquisition system.
Step 2：Function of many variables plan is carried out to non-steady state electrical conductivity using least square method using compiled program
Close, the data inverse concrete electrical conductivity measured based on least square finite element method according to step 1.
Step 3：The electrical conductivity that inverse goes out is compared in standard database, reflects the true age of test specimen,
So that it is determined that whether test piece intensity meets to require.
The artificial DC electric field that direct current is powered to be formed by electrode to concrete sample in step 1, due to direct current
The distribution of electric charge does not change in electric field, is a kind of electric field of stabilization.
Electric field equation is utilized in step 2
In formula ρ for institute's test block resistivity；K is electrode arrangement coefficient, and distance dependent is embedded to electrode；For inner side
Two interelectrode potential differences；I is the current strength in circuit.Non- steady state electrical conductivity is carried out by least square FInite Element
The function of many variables are fitted, and the node Electric Field Distribution detected based on least square finite element method according to step 1 carries out calculating concrete
The non-steady state process of electrical conductivity, obtains non-steady state electrical conductivity.
Standard database in step 3, it is right in each age for same type concrete standard test specimen under the conditions of standard curing
The electrical conductivity answered, standard specimen size are 0.4m × 0.1m × 0.1m (length × width × height), can pass through step 1 and step 2
Its resistivity is measured, and is previously entered in Compare System and is used as standard database.
The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model
System, the technical scheme that the scope of protection of the utility model should be recorded with claim, including the technical scheme that claim is recorded
The equivalents of middle technical characteristic are protection domain.Equivalent substitution i.e. within this range is improved, also in the utility model
Protection domain within.
Claims (7)
- A kind of 1. age of concrete real-time monitoring system, it is characterised in that：Including power supply（1）, digital voltmeter（2）, numeral electricity Flow table（6）And metal electrode（4）, power supply（1）Both positive and negative polarity pass through wire（3）With two metal electrodes in outside（4）Connection, Metal electrode（4）With power supply（1）Between be provided with digital electronic ammeter（6）；Digital voltmeter（2）Positive terminals lead to negative terminals Cross wire（3）Respectively with two metal electrodes of inner side（4）Connection, metal electrode（4）Embedded and concrete sample（5）In；Institute State digital voltmeter（2）And digital electronic ammeter（6）With controller（7）Electrical connection.
- A kind of 2. age of concrete real-time monitoring system according to claim 1, it is characterised in that：The metal electrode（4） Linear type, concrete sample is embedded at a distance of 0.5m（5）In.
- A kind of 3. age of concrete real-time monitoring system according to claim 1 or claim 2, it is characterised in that：The metal electrode （4）It is embedded in concrete sample（5）In depth be its length half.
- A kind of 4. age of concrete real-time monitoring system according to claim 1, it is characterised in that：The controller（7）With Client computer connects.
- A kind of 5. age of concrete real-time monitoring system according to claim 4, it is characterised in that：The controller（7）It is logical RS485 communication interfaces are crossed to be connected with client computer.
- A kind of 6. age of concrete real-time monitoring system according to claim 4, it is characterised in that：It is described to pass through radio communication Module is connected with client computer.
- A kind of 7. age of concrete real-time monitoring system according to claim 6, it is characterised in that：The wireless communication module For 4G wireless communication modules or ZigBee wireless communication modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720342058.3U CN206638619U (en) | 2017-04-01 | 2017-04-01 | A kind of age of concrete real-time monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720342058.3U CN206638619U (en) | 2017-04-01 | 2017-04-01 | A kind of age of concrete real-time monitoring system |
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| Publication Number | Publication Date |
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| CN206638619U true CN206638619U (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720342058.3U Expired - Fee Related CN206638619U (en) | 2017-04-01 | 2017-04-01 | A kind of age of concrete real-time monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433096A (en) * | 2019-08-26 | 2021-03-02 | 南京工程学院 | Method for testing resistivity of conductive concrete in loading process |
-
2017
- 2017-04-01 CN CN201720342058.3U patent/CN206638619U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433096A (en) * | 2019-08-26 | 2021-03-02 | 南京工程学院 | Method for testing resistivity of conductive concrete in loading process |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20180401 |