CN204855770U - Concrete resistivity apparatus calibrating device - Google Patents
Concrete resistivity apparatus calibrating device Download PDFInfo
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- CN204855770U CN204855770U CN201520414518.XU CN201520414518U CN204855770U CN 204855770 U CN204855770 U CN 204855770U CN 201520414518 U CN201520414518 U CN 201520414518U CN 204855770 U CN204855770 U CN 204855770U
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Abstract
The utility model discloses a concrete resistivity apparatus calibrating device, including the surperficial box body that has control panel, be provided with the resistivity calbiration system in the box body, last calibration contact and 4 the at least gear switches of installing four inlines of control panel, the resistivity calbiration system includes at least 4 group's calibration circuits, every group calibration circuit includes three control circuit, every control circuit includes a synchro switch and a resistance and both series connection, every control circuit inserts respectively between two arbitrary adjacent calibration contacts, resistance with the three resistance in a set of calibration circuit is the same, can should organize three the synchro switch closure / disconnection in the calibration circuit by the simultaneous control during every gear switch closure / disconnection. The utility model discloses the beneficial effect who reaches: can carry out accurate calibration step by step to the resistivity of different ranges through setting up a plurality of gears, the calibration scope can reach 4-2000k omega cm, still can be according to higher resistivity test scope of actual conditions setting and geng duo's calibration position.
Description
Technical field
The utility model belongs to instrument and equipment Calibration Technology field, be specifically related to a kind of concrete resistivity analyzer calibrating installation, be applicable to the units such as reinforced concrete Instrument Measuring Resistivity of Carbon Products manufacturing enterprise, applying unit and measurement technology mechanism to the calibration of reinforced concrete Instrument Measuring Resistivity of Carbon Products and quality testing.
Background technology
The corrosion of reinforcement in concrete is the phenomenon caused by a kind of electrochemical action, and this effect is understood generation current and reinforcing bar is corroded, and therefore can infer that whether reinforcing bar is by corrosion by testing concrete resistivity.Resistivity is a very important parameter for this building materials of reinforced concrete, easily obtained by simple research technique, it directly can reflect the corrosion situation of reinforcing bar, can also set up with other performances of concrete well and contact, be the important evidence of reflection concrete quality situation.This apparatus measures concrete resistivity method is simple, fast, be easy to operation, is expected to become a kind of new concrete nondestructive testing technology and be applied in concrete works.Therefore, the accurate detection means of science not only has great significance for the determination of resistivity and internal corrosion situation, also for reinforced concrete works and building operation and can accumulate experience with material simultaneously, construction work and secure context significant.
Concrete resistivity analyzer is the instrument for measuring concrete resistivity, and it can be used for measuring the electronic impedance on concrete bodies 3 surface and detect the corrosion situation of reinforced concrete structure.Instrument Measuring Resistivity of Carbon Products conventional is at present four point probe Instrument Measuring Resistivity of Carbon Products (hereinafter referred to as Instrument Measuring Resistivity of Carbon Products), and it mainly comprises electric part basic equipment, probe and display composition.Electric part generally comprises instrument and the parts such as adjustable constant current source, A/D converter, digital indicator, reversing switch.Probe segment is made up of sensor, fills in gauge hole and use after sponge must being infiltrated.Its test philosophy figure is as shown in Figure 1: electrode applies electric current I laterally, and electric current is flowed into by a, and b returns, and the current field that at this moment external electrode produces produces electromotive force on interior electrode.Potential difference (PD) in measuring with potential difference meter or high resistance voltmeter between electrode c and d, U/I is stake resistance.The computing formula of resistivity is: ρ=RS/L.Wherein, ρ is resistivity (k Ω cm); S is conductive wire cross-section area (m
2); R is resistance value (Ω); L is conductor length (m).ρ=2 π R/(1/a can be released according to Fig. 1
1-1/a
2-1/a
3+ 1/a
4).Its instrumentation plan as shown in Figure 2, during measurement, by the sponge that the probe place of four electrodes infiltrates, is pressed in detected concrete body 3 surface beyond the Great Wall.The resistivity value of testee can be read from the display of instrument host.
Instrument Measuring Resistivity of Carbon Products effect in inside concrete corrosion judgement and building safety monitoring is great, whether instrument itself accurately also counts for much, but the calibrating installation also not having the whole measure scope accuracy of an energy to four point probe formula Instrument Measuring Resistivity of Carbon Products to calibrate now, cannot carry out measurement and calibration to Instrument Measuring Resistivity of Carbon Products.
Utility model content
The utility model proposes a kind of concrete resistivity analyzer calibrating installation, structure is simple, is easy to carry, and calibration accurately, can calibrate the concrete resistivity analyzer of different range.
Technical solution of the present utility model: a kind of concrete resistivity analyzer calibrating installation, comprises the box body that there is control panel on surface, be provided with resistivity calibration system in box body; Control panel is provided with calibration touch point and at least 4 driving switch of four line spread; Resistivity calibration system comprises at least 4 group calibration circuits; Often organize calibration circuit and comprise three control circuits; Each control circuit comprises a synchro switch and a resistance and both series connection; Often three control circuits organized in calibration circuit access between two calibration touch point of arbitrary neighborhood respectively, and the resistance of three resistance is identical; Three synchro switches that can simultaneously control when each driving switch closes/disconnects in this group calibration circuit close/disconnect.
In the utility model, driving switch is arranged in order on the control panel from small to large according to calibration range, and the resistance value sum in corresponding calibration circuit also increases successively.
In the utility model, the quantity of driving switch is 8, and the group number of corresponding calibration circuit is 8 groups.
In the utility model, also comprise lid, lid is hinged on the sidewall of box body, can cover or expose control panel when lid rotates.
In the utility model, four calibration touch point equidistant arrangement.
The beneficial effect that the utility model reaches:
1. can carry out accurate calibration step by step to the resistivity of different range by arranging multiple gear, calibration range can reach 4 ~ 2000k Ω cm; Also can arrange higher resistivity measurement scope according to actual conditions, its parameter can be traced to the source to National primary standard.
2. the resistance in each calibration circuit is all equal, and can carry out as required arranging or changing, and is convenient to calibrate the resistivity of different range ability.
3. when finishing using, lid is put down and just can cover control panel, to prevent dirty and external impacts from causing damage to it, improve the serviceable life of this device.
4. calibration touch point equidistant line arrangement, corresponding with the probe of existing four point probe formula Instrument Measuring Resistivity of Carbon Products, be more beneficial to operation, in addition, equidistant setting is also beneficial to calculating, improves calibration accuracy and shortens computing time.
5. this apparatus structure is simple, and calibration accurately, is easy to carry and operates.
Accompanying drawing explanation
Accompanying drawing 1 is the mensuration schematic diagram of four point probe formula Instrument Measuring Resistivity of Carbon Products;
Accompanying drawing 2 is measuring principle figure of four point probe formula Instrument Measuring Resistivity of Carbon Products;
Accompanying drawing 3 is structural representations of the present utility model;
Accompanying drawing 4 is workflow diagrams of the present utility model;
Accompanying drawing 5 is circuit connection diagrams of the present utility model.
Reference numeral:
1 Instrument Measuring Resistivity of Carbon Products; 2 probes; 3 concrete bodies; 4 box bodys; 5 control panels; 6 calibration touch point; 7 driving switch; 8 lids; 9 synchro switches; 10 resistance.
Embodiment
Below in conjunction with real-time example and accompanying drawing, technical solutions of the utility model are described in further detail, but protection domain of the present utility model is not limited to described embodiment.
As shown in Figs. 3-4, a kind of concrete resistivity analyzer calibrating installation, comprises the box body 4 that there is control panel 5 on surface, is provided with resistivity calibration system in box body 4.Control panel 5 is provided with the probe 2 of the corresponding four point probe formula Instrument Measuring Resistivity of Carbon Products 1 of calibration touch point 6 difference of four linear systematic arrangements, and 8 driving switch 7.Calibration touch point 6 is divided into the first contact, the second contact, the 3rd contact and the 4th contact in order successively.8 driving switch 7 are arranged in order from small to large according to calibration range.
As shown in Fig. 5 (a), resistivity calibration system comprises 8 groups of calibration circuits, and set gradually from small to large by calibration range, each driving switch 7 controls the conducting of corresponding calibration circuit.As shown in Fig. 5 (b), assembly and the connected mode thereof of often organizing calibration circuit are all identical, are specially the first calibration circuit and comprise three control circuits, are followed successively by first control circuit, second control circuit and the 3rd control circuit.Each control circuit comprises a resistance 10 and a synchro switch 9 and both series connection.First control circuit is serially connected between the first calibration touch point and the second calibration touch point; Second control circuit is serially connected between the second calibration touch point and the 3rd calibration touch point; 3rd control circuit is serially connected between the 3rd calibration touch point and the 4th calibration touch point.The resistance often organizing three resistance in calibration circuit is identical.By that analogy, the connected mode of other seven groups of calibration circuits is identical all therewith with composition.According to the change of calibration range, the resistance value in calibration circuit also increases successively, and the resistance value namely for calibrating in the calibration circuit of maximum range resistivity is maximum, and the resistance value of calibrating in the calibration circuit of minimum range resistivity is minimum.
Each driving switch 7 controls all to three synchro switches 9 should organized in calibration circuit.When by next driving switch 7, in the calibration circuit under this grade, three synchro switches 9 close all simultaneously, connect calibration circuit.
In order to protect box body 4 internal circuit and relevant contacts not by stained and outside destroy, hinged installation lid 8 on box body 4, lid 8 rotates and can cover control panel 5; Lid 8 upwards rotational exposes control panel 5 for work.
The course of work of the present utility model and principle:
As shown in Figure 4, step 1), calibrating installation adjusts calibration flow process: steadily placed by calibration instrument, open lid 8, exposes control panel 5 and keeps stable.
Tested Instrument Measuring Resistivity of Carbon Products 1 corrects: step 2), operate by four calibration touch point 6 on four probe aiming calibrating installation panels of test examination instrument, both fully contact.Step 3), the resistivity value of selected required calibration, selects respective notch switch 7, and adjustment calibrating installation is to duty.Step 4), selected calibration range, presses driving switch 7, and the resistivity number of degrees after stable on observed and recorded analyzer display, this step repeatedly obtains multi-group data, step 5), and then selects next gear to measure.The data preparation will recorded after calibration, finally completes calibration, otherwise will return step 3).Calibration value and resistivity standard value are contrasted, the error of indication of this calibration point can be obtained, as following formula:
Δ=ρ-ρ
0；
In formula: Δ is the error of indication; ρ is tested Instrument Measuring Resistivity of Carbon Products reading; ρ
0for calibrating installation standard electric values of resistivity.
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (5)
1. a concrete resistivity analyzer calibrating installation, is characterized in that: comprise the box body that there is control panel on surface, be provided with resistivity calibration system in box body;
Control panel is provided with calibration touch point and at least 4 driving switch of four line spread; Resistivity calibration system comprises at least 4 group calibration circuits; Often organize calibration circuit and comprise three control circuits; Each control circuit comprises a synchro switch and a resistance and both series connection; Often three control circuits organized in calibration circuit access between two calibration touch point of arbitrary neighborhood respectively, and the resistance of three resistance is identical; Three synchro switches that can simultaneously control when each driving switch closes/disconnects in this group calibration circuit close/disconnect.
2. a kind of concrete resistivity analyzer calibrating installation according to claim 1, is characterized in that: driving switch is arranged in order on the control panel from small to large according to calibration range, and the substitutional resistance value in corresponding calibration circuit also increases successively.
3. a kind of concrete resistivity analyzer calibrating installation according to claim 1 and 2, is characterized in that: the quantity of driving switch is 8, and the group number of corresponding calibration circuit is 8 groups.
4. a kind of concrete resistivity analyzer calibrating installation according to claim 3, it is characterized in that: also comprise lid, lid is hinged on the sidewall of box body, can cover or expose control panel when lid rotates.
5. a kind of concrete resistivity analyzer calibrating installation according to claim 4, is characterized in that: four calibration touch point equidistant arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520414518.XU CN204855770U (en) | 2015-06-16 | 2015-06-16 | Concrete resistivity apparatus calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520414518.XU CN204855770U (en) | 2015-06-16 | 2015-06-16 | Concrete resistivity apparatus calibrating device |
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| Publication Number | Publication Date |
|---|---|
| CN204855770U true CN204855770U (en) | 2015-12-09 |
Family
ID=54746307
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520414518.XU Active CN204855770U (en) | 2015-06-16 | 2015-06-16 | Concrete resistivity apparatus calibrating device |
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| Country | Link |
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| CN (1) | CN204855770U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758895A (en) * | 2016-05-11 | 2016-07-13 | 山东电力工程咨询院有限公司 | Soil resistivity temperature correcting method |
| CN108508391A (en) * | 2018-06-04 | 2018-09-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | A kind of four probe resistance rate tester calibration modules |
-
2015
- 2015-06-16 CN CN201520414518.XU patent/CN204855770U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758895A (en) * | 2016-05-11 | 2016-07-13 | 山东电力工程咨询院有限公司 | Soil resistivity temperature correcting method |
| CN108508391A (en) * | 2018-06-04 | 2018-09-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | A kind of four probe resistance rate tester calibration modules |
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| GR01 | Patent grant |