CN2108922U - Portable intelligent quick corrosion measurer - Google Patents
Portable intelligent quick corrosion measurer Download PDFInfo
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- CN2108922U CN2108922U CN 91222159 CN91222159U CN2108922U CN 2108922 U CN2108922 U CN 2108922U CN 91222159 CN91222159 CN 91222159 CN 91222159 U CN91222159 U CN 91222159U CN 2108922 U CN2108922 U CN 2108922U
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- microprocessor
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Abstract
The utility model relates to a measuring device used for analyzing the corrosion-resisting property and the corrosion rate of metallic materials, which is composed of a controller, a microprocessor and a D/A converter of input/output interfaces, wherein, the controller is composed of a voltage amplification follower, an overload displayer, an electric current-voltage converter, a filter amplifier and a differentiating circuit. With the samplings of an electrode, a study electrode, a reference electrode and an auxiliary electrode on the probe, test signals are input into the microprocessor to carry out data processing, and the test result is input by external equipment finally. The utility model takes an SCM as a core, and has the advantages of power saving, practicality, light weight and small size. The utility model can be widely used for the measurement in the systems of petroleum, chemical industry, soil, etc.
Description
The utility model belongs to the decay resistance of test material and the surveying instrument of corrosion speed and analysis of material decay resistance.
The polarization resistance technology all has a wide range of applications in corrosion research and commercial production, by measurement to the polarization resistance of metal erosion system, and the corrosion speed of analysis of metallic materials in medium quantitatively, the corrosion situation of the monitoring equipment of industrial product.Usually popular employing square-wave potential method is measured near corrosion potential " Linear Polarization Resistance " as polarization resistance in corrosion electrochemistry, with linear polarization technique measure polarization resistance not only theoretical error be big and actual measurement in error be subjected to other factors to influence the error that is caused to increase, this makes the Linear Polarization Resistance measuring technique be very limited in actual applications.
For solving above deficiency, the utility model provides a kind of differential polarization resistance measuring instrument that is used to implement differential polarization resistance measuring method, with the single-chip microcomputer is core, and circuit and program are optimized, make this instrument have that measuring speed is fast, in light weight, volume is little, be easy to carry about with one, easy and simple to handle.Effectively solved the measurement of Corrosion of Metallic Materials speed and corrosion galvanic couple electric current.
The utility model provides a kind of differential polarization resistance measuring instrument that is used to implement differential polarization resistance measuring method, comprises as the lower part: the I controller; The II microprocessor; III multi-way switch and A/D converter, the D/A converter of IV two tunnel output simulating signals.Wherein microprocessor simulating signal that controller part will be exported is gathered through multi-way switch and A/D converter, the collection of CH1 passage be voltage signal behind current/voltage converter, when instrument is worked, need constantly to gather this signal, to determine a proper current range; The collection of CH2 passage be the differential current signal through microprocessor according to the differential current size of gathering, finally demonstrate the result through a series of computings; The collection of CH3 passage be the corrosion potential of electrochemical system, and after the analog quantity that one road D/A output equates with the corrosion potential of gathering be added on the electrochemical system to main discharge road input end via controller.Controller is by main amplifier, voltage amplification follower current/voltage-converted circuit and filtering, differentiating circuit is formed, WE joins for research electrode and ground in Fig. 1, CE is an auxiliary electrode, join through K switch and main amplifier, join with electric current/electric transducer simultaneously, RE is a contrast electrode, with the main discharge road and follow amplifying circuit and join, make controller become one and have the constant potential system of voltage negative feedback function, what exported on another road of D/A converter is the scanning electric potential signal of small magnitude, the input end that is added to the main discharge road is through potentiostatic circuit Control Study polarization of electrode, when the research electrode polarization, the polarization of electrode electric current becomes voltage signal output through current/voltage converter, falls the high frequency noise composition through second-order active filter.Give the A/D change-over circuit of controlling by microprocessor, the relating to parameters of the size of differential current signal and sweep velocity differentiator through differentiator output differential current again.
The advantage of the utility model: be core with the single-chip microcomputer, have power saving, practicality, in light weight, volume is little, be easy to carry about with one, stable performance, can be widely used in the measurement of corrosion speed in the systems such as oil, chemical industry, soil, is a kind of multifunctional intelligent corrosion speed measuring instrument.
Detailed structure of the present utility model and principle of work are provided by following examples and accompanying drawing.
Fig. 1 is the complete machine block scheme of the quick corrosion measurement instrument of portable intelligent;
Fig. 2 is the controller electrical schematic diagram of the quick corrosion measurement instrument of portable intelligent.
Fig. 3,4 is the shape assumption diagram of the quick corrosion measurement instrument of portable intelligent.
Just forming quick each main circuit of corrosion measurement instrument of intelligence below respectively is illustrated:
(1) controller circuitry, its core is a potentiostatic circuit, as representing among Fig. 2, arrive the current potential of studying between the electrode (WE) in order to constant contrast electrode (RE), (WE) ground connection wherein, potentiostatic circuit adopts anti-phase amplification constant potential principle in this tester, and it is to be made of main amplifier (A), current-voltage converter (B) and differential amplifier (D); Filter amplifier (E), for further reducing the influence of noise to differential, before differentiating circuit, set up a filter amplification circuit, it be one by resistance capacitance, two inverting amplifiers are composed in series, the current-voltage converter output of its input end and constant potential is joined, output termination differentiating circuit (F); Differentiating circuit: it is used for the current signal of electrode is carried out the differential processing, constitute by operational amplifier and resistance, capacitance network, and be connected on the output terminal of filter amplification circuit, resistance-capacitance network is in order to suppress the influence of Experiment in Erosive Electrochemistry high-frequency noises to differentiating circuit.
(2) microprocessor (G): its input signal and A/D converter (j) join, and front and multi-way switch (i) will join, and one of multi-way switch end is by current-to-voltage convertor (B) and differential amplifier (D) output; One routing voltage amplifies follower (C) output; Another route differentiating circuit (F) output.Microprocessor (G) will record signal again and become analog quantity by D/A1(K) and D/A2(L) export to constant potential controller in the main amplifier (A), microprocessor at last with the result by external interface, display and printer M output.
The surface structure of the utility model measuring instrument component-assembled is by shown in Fig. 3,4.
In Fig. 3,4, (1) potentiostatic circuit is prepared, working selecting switch; (2) continuous trigger selector switch; (3) linear polarization command signal starting switch; (4) the linear polarization scanning signal refers to fast selector switch; (5) linear polarization scanning signal amplitude selector switch; (6) power light; (7) over-compensation indication zeroing; (8) power switch; (9) measure current potential, electric current, differential current selector switch; (10) current range selector switch; (11) display; (12) potentiostatic circuit zeroing; (13) differential output zeroing; (14) potentiostatic circuit current-voltage conversion zeroing; (15) fuse; (16) attaching plug; (17) external research electrode WE, auxiliary electrical CE, contrast electrode RE plug.
When adopting this measuring instrument provides the differential polarization resistance is measured, elder generation's starting switch (1) makes the potentiostatic circuit duty, make switch (12) be in the sampling location again, and make switch (9) be in measurement differential current position, press trigger switch (3) at last, so polarized signal is applied on the research electrode WE by potentiostatic circuit, the electric current that flows through research electrode WE amplifies through filtering,, by external interface display or printer test data is exported at last to microprocessor through differential, multi-way switch, A/D converter.
Claims (3)
1, the quick corrosion measurement instrument of a kind of portable intelligent, exporting two road D/A converters by I controller, II microprocessor III multi-way switch and A/D converter, IV microprocessor forms, it is characterized in that controller is with current-voltage switching signal CH1 road, voltage amplification is followed signal CH3 and all is connected multi-way switch (1) input end with differential output signal CH2, through A/D converter (j) input microprocessor (G); Microprocessor (G) is exported simultaneously through two road D/A converters (K) and (L) is input to controller.
2, by the described quick corrosion measurement instrument of portable intelligent of claim 1, it is characterized in that controller I is by overload indicator (N), current-voltage converter (B) and differential amplifier (D), voltage amplification follower (C), filter amplifier (E) and differentiating circuit (F) constitute, and one end and voltage amplification follower join; One end and current-voltage converter (B) and differential amplifier (D) join; The other end joins with overload display (N).
3, by claim 1,2 described quick corrosion measurement instrument of portable intelligent, it is characterized in that one of main amplifier A end and voltage amplification follower (C) join, the while joins with contrast electrode (RE); One end joins with electric current one electric pressure converter (B) and differential amplifier (D), joins with auxiliary electrode (E) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222159 CN2108922U (en) | 1991-09-11 | 1991-09-11 | Portable intelligent quick corrosion measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222159 CN2108922U (en) | 1991-09-11 | 1991-09-11 | Portable intelligent quick corrosion measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2108922U true CN2108922U (en) | 1992-07-01 |
Family
ID=4929060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91222159 Granted CN2108922U (en) | 1991-09-11 | 1991-09-11 | Portable intelligent quick corrosion measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2108922U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005106428A1 (en) * | 2004-04-30 | 2005-11-10 | Hunan University | Direct measurement method and equipment of antitrust performance of aqueous protective fluid with wire beam electrode sensor |
| CN1325906C (en) * | 2002-12-16 | 2007-07-11 | 五鼎生物技术股份有限公司 | Portable multifunctional electrochemical biological detecting instrument |
| CN100338455C (en) * | 2005-03-18 | 2007-09-19 | 韶关学院 | On-line monitoring method for failure state of metal and protection layer inter face |
-
1991
- 1991-09-11 CN CN 91222159 patent/CN2108922U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325906C (en) * | 2002-12-16 | 2007-07-11 | 五鼎生物技术股份有限公司 | Portable multifunctional electrochemical biological detecting instrument |
| WO2005106428A1 (en) * | 2004-04-30 | 2005-11-10 | Hunan University | Direct measurement method and equipment of antitrust performance of aqueous protective fluid with wire beam electrode sensor |
| CN100338455C (en) * | 2005-03-18 | 2007-09-19 | 韶关学院 | On-line monitoring method for failure state of metal and protection layer inter face |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |