CN203561608U - Portable soil corrosion speed measuring instrument - Google Patents
Portable soil corrosion speed measuring instrument Download PDFInfo
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- CN203561608U CN203561608U CN201320780409.0U CN201320780409U CN203561608U CN 203561608 U CN203561608 U CN 203561608U CN 201320780409 U CN201320780409 U CN 201320780409U CN 203561608 U CN203561608 U CN 203561608U
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- Prior art keywords
- soil
- operational amplifier
- probe
- relay
- converter
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- 239000002689 soil Substances 0.000 title claims abstract description 102
- 230000007797 corrosion Effects 0.000 title claims abstract description 66
- 238000005260 corrosion Methods 0.000 title claims abstract description 66
- 239000000523 sample Substances 0.000 claims abstract description 55
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000009977 dual effect Effects 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 238000009529 body temperature measurement Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The utility model relates to a portable soil corrosion speed measuring instrument, which comprises an oxidation-reduction potential measurement unit, a soil resistivity measurement unit, a soil corrosion speed measurement unit and a temperature measurement unit, wherein analog signals output from the oxidation-reduction potential measurement unit, the soil resistivity measurement unit and the soil corrosion speed measurement unit are connected to a central processing unit through digital signals which pass through an analog to digital (A/D) converter, a signal wire of the temperature measurement unit is connected onto the central processing unit, the oxidation-reduction potential measurement unit is connected with an oxidation-reduction measurement probe, and the soil resistivity measurement unit, the soil corrosion speed measurement unit and the temperature measurement unit are connected with multi-functional combined probes. The portable soil corrosion speed measuring instrument effectively reduces influence of soil medium IR drop when measuring corrosion current density, and accurately measures soil resistivity, thereby preventing reading difficulty caused by high voltage measurement and physical and chemical properties destruction caused by soil electrolysis.
Description
Technical field
The utility model relates to a kind of instrument of measuring soil corrosion speed, specifically a kind of portable soil corrosion speed measuring instrument.
Background technology
Soil corrosivity is an important topic in soil corrosion research, and the detection of soil corrosivity is key wherein.The method of traditional acquisition soil corrosion data is mainly the physical and chemical parameter assessing methods such as the resistivity of burying sheet method and soil in typical soil, water cut, salt content, potential of hydrogen, oxidation-reduction potential, ferrous materials above earth potential.Owing to burying sheet method, need long time could obtain data; And the factors such as soil physical chemistry parameter and environmental change, Measuring Time are closely related, interactive impact between parameter in addition, makes its evaluating result reliability lower; Thereby these methods are all difficult to meet the needs of practical application.
Utility model content
Evaluating result reliability for soil corrosion speed in prior art is lower, is difficult to meet the deficiencies such as needs of practical application, and the technical problems to be solved in the utility model is to provide high, the easy to operate portable soil corrosion speed measuring instrument of a kind of reliability.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of portable soil corrosion speed of the utility model measuring instrument, comprise oxidation-reduction potential measuring unit, soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit, wherein the digital signal of the simulating signal of oxidation-reduction potential measuring unit, soil resistivity measuring unit, the output of soil corrosion velocity survey unit after A/D converter is connected to CPU (central processing unit), and the signal wire of temperature measuring unit is connected to CPU (central processing unit); Oxidation-reduction potential measuring unit is connected to redox measuring sonde; Soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit are connected to multi-functional combination probe.
Described oxidation-reduction potential measuring unit comprises: first instrument operational amplifier and the first relay, wherein the positive-negative input end of first instrument operational amplifier is connected to redox measuring sonde by the first relay tip through interface end, and the output terminal of instrumentation amplifier is connected to A/D converter.
Described soil resistivity measuring unit comprises: the first dual operational amplifier, relay, second instrument operational amplifier and the 3rd instrumentation amplifier, wherein the positive-negative input end of the first dual operational amplifier is connected to respectively the output signal of reference voltage and D/A converter, the first ring that the output terminal of the first dual operational amplifier is popped one's head in the soil resistivity in multi-functional combination probe by the contact of relay is connected, second of soil resistivity probe, three rings are just being connected to second instrument operational amplifier by the contact of relay respectively, negative input end, the Fourth Ring of soil resistivity probe is connected to the positive input terminal of the 3rd instrumentation amplifier by the contact of relay, and be connected to the feedback signal input end of the first dual operational amplifier, the negative input end ground connection of the 3rd instrumentation amplifier, the output terminal of second instrument operational amplifier and the 3rd instrumentation amplifier is connected with A/D converter.
Described soil corrosion velocity survey unit comprises D/A converter, voltage-reference, second, the 3rd dual operational amplifier, relay, wherein D/A converter input end is connected to the control signal of CPU (central processing unit), the output terminal of D/A converter is connected to respectively the positive input terminal of the first dual operational amplifier and the 3rd dual operational amplifier, the 3rd dual operational amplifier negative input termination power supply benchmark, the output terminal of the 3rd dual operational amplifier is connected to first ring and the five rings of the corrosion rate probe in multi-functional combination probe by relay tip, the positive input terminal ground connection of the second dual operational amplifier, negative input end connects the second ring and Fourth Ring of corrosion rate probe by relay, output terminal is connected to A/D converter, the positive input terminal of the second dual operational amplifier connects the 3rd ring of corrosion rate probe by relay, output terminal is connected to A/D converter, feed back to the negative input end of the 3rd dual operational amplifier B amplifier simultaneously.
The utility model also has soil moisture measuring unit, by the numerical value of the direct reading temperature sensor of CPU (central processing unit).
Described multi-functional combination probe is bar-shaped, there is a cored screw, screw rod outside is insulation rod, the corrosion rate probe and the temperature sensor that on insulation rod, distribute and there is multielectrode soil resistivity probe, there are a plurality of detection rings, and each probe and sensor signal lines are passed in cored screw.
Described soil resistivity probe is four electrodes, and corrosion rate probe is five detection rings.
The front end of described multi-functional combination probe is taper.
Described redox measuring sonde is standard platinum electrode, copper sulfate eletrode.
Each relay is twin coil magnetic latching relay.
The utlity model has following beneficial effect and advantage:
1. the utility model adopts the composite joint of five identical material electrode retaining collars to become combined type electrochemical probe, has effectively reduced the impact that while measuring corrosion electric current density, soil media IR falls.
2. the utility model uses four electrode catheters, adopts relatively low measuring voltage, and Accurate Determining soil resistivity avoids reading difficulty and soil electrolysis that high-tension measurement brings to cause physicochemical property to destroy.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is oxidation-reduction potential unit electrical schematic diagram in the utility model;
Fig. 3 is soil resistivity measuring unit electrical schematic diagram in the utility model;
Fig. 4 is soil corrosion velocity survey unit electrical schematic diagram in the utility model;
Fig. 5 is multi-functional combination probe structural representation in the utility model.
Wherein, U10 is first instrument operational amplifier, U7 is second instrument operational amplifier, U2 is the 3rd instrumentation amplifier, and U4A-U4B is the first dual operational amplifier, and U25A-U25B is the second dual operational amplifier, U5A-U5B is the 3rd dual operational amplifier, DQ1A is the first relay, and JDQ2A-JDQ2B is the second relay, and JDQ3-JDQ4A-DQ4B is the 3rd relay.
Embodiment
Below in conjunction with Figure of description, the present invention is further elaborated.
The soil corrosion of metal material is an electrochemical process, and the parameters such as the corrosion electric current density by mensuration metal in soil and polarization resistance can be evaluated the corrosivity of soil rapidly.The utility model adopts linear polarization, weak polarization principles to measure soil corrosion current density and evaluate on the basis of soil corrosivity, designed multifunction soil corrosion speed measuring instrument, change and according to the chemical factors measured value of soil, carried out the traditional thought of soil corrosion evaluation in the past, set up the new technology of directly evaluating soil corrosivity according to field electrochemical measured value.
As shown in Figure 1, a kind of portable soil corrosion speed of the utility model measuring instrument, comprise oxidation-reduction potential measuring unit, soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit, wherein the digital signal of the simulating signal of oxidation-reduction potential measuring unit, soil resistivity measuring unit, the output of soil corrosion velocity survey unit after A/D converter is connected to CPU (central processing unit), and the signal wire of temperature measuring unit is connected to CPU (central processing unit); Oxidation-reduction potential measuring unit is connected to redox measuring sonde; Soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit are connected to multi-functional coupling probe.
As shown in Figure 2, described oxidation-reduction potential measuring unit comprises: first instrument operational amplifier U10 and relay J DQ1A, wherein the positive-negative input end of instrumentation amplifier U10 has the redox measuring sonde in multi-functional combination probe by the contact of the first relay DQ1A through interface J2 termination, and the output terminal of instrumentation amplifier U10 is connected to A/D converter.The first relay J DQ1A is twin coil magnetic latching relay, whether charged controls twin coil by two driver module U12 and U16, further controls deciliter action of contact; Contact is dpdt double-pole double-throw (DPDT) form.In the present embodiment, redox measuring sonde adopts standard platinum electrode, copper sulfate eletrode.Soil redox potential measurement range: ± 3000mV, error :≤1%.
As shown in Figure 3, described soil resistivity measuring unit comprises: the first dual operational amplifier U4A-U4B, the second relay, second instrument operational amplifier U7 and the 3rd instrumentation amplifier U2, wherein the positive-negative input end of the first dual operational amplifier U4A-U4B is connected to respectively the output signal of reference voltage and D/A converter, the first ring that the output terminal of the first dual operational amplifier U4A-U4B is popped one's head in the soil resistivity in multi-functional combination probe by the contact of the second relay J DQ2A-JDQ2B is connected, second of soil resistivity probe, three rings are just being connected to second instrument operational amplifier U7 by the contact of the second relay J DQ2A-JDQ2B respectively, negative input end, the Fourth Ring of soil resistivity probe is connected to the positive input terminal of the 3rd instrumentation amplifier U2 by the contact of the second relay J DQ2A-JDQ2B, and be connected to the feedback signal input end of the first dual operational amplifier U4A-U4B, the negative input end ground connection of the 3rd instrumentation amplifier U2, the output terminal of second instrument operational amplifier U7 and the 3rd instrumentation amplifier U2 is connected with A/D converter.
Because soil resistivity probe has four detecting electrodes, therefore the second relay J DQ2A-JDQ2B is the combination of two relay J DQ2A, JDQ2B, can provide four contacts to connect different detecting electrodes.
As shown in Figure 4, described soil corrosion velocity survey unit comprises D/A converter, voltage-reference, second, the 3rd dual operational amplifier U25A-U25B, U5A-U5B, the 3rd relay J DQ3-JDQ4A-DQ4B, wherein D/A converter input end is connected to the control signal of CPU (central processing unit), the output terminal of D/A converter is connected to respectively the positive input terminal of the first dual operational amplifier U4A-U4B and the 3rd dual operational amplifier U5A-U5B, the 3rd dual operational amplifier U5A-U5B negative input termination power supply benchmark, the output terminal of the 3rd dual operational amplifier U5A-U5B is connected to first ring and the five rings of the corrosion rate probe in multi-functional combination probe by the 3rd relay J DQ4A-JDQ4B contact, the positive input terminal ground connection of the second dual operational amplifier U25A-U25B, negative input end connects the second ring and Fourth Ring of corrosion rate probe by the 3rd relay J DQ4A-JDQ4B, output terminal is connected to A/D converter, the positive input terminal of the second dual operational amplifier U25A-U25B connects the 3rd ring of corrosion rate probe by the 3rd relay J DQ4A-JDQ4B, output terminal is connected to A/D converter, feed back to the negative input end of the B amplifier U5B of the 3rd dual operational amplifier U5A-U5B simultaneously.
Because corrosion rate probe has five detection rings, therefore the 3rd relay J DQ3-JDQ4A-DQ4B is the combination of three relay J DQ3, JDQ4A, DQ4B, can provide five contacts to connect different detection rings.
This soil corrosion velocity survey unit, by the 3rd dual operational amplifier U5A-U5B polarized electrode, A amplifier U25A by the second dual operational amplifier U25A-U25B reads corrosion potential, and the B amplifier U25B by two dual operational amplifier U25A-U25B reads corrosion current.Through A/D conversion, by CPU (central processing unit), calculate corrosion speed.
Soil moisture measuring unit, by the direct reading temperature sensor DS18B20 of CPU (central processing unit) numerical value; Clock unit and data storage cell, directly stored and read by CPU (central processing unit).
As shown in Figure 5, in the utility model, multi-functional combination probe is bar-shaped, there is a cored screw, screw rod outside is insulation rod, the corrosion rate probe and the temperature sensor T that on insulation rod, distribute and have multielectrode soil resistivity probe, have a plurality of detection rings, each probe and sensor signal lines are passed in cored screw.
Corrosion rate probe adopts the composite joint of five identical material electrode retaining collars to become combined type electrochemical probe, has effectively reduced the impact that while measuring corrosion electric current density, soil media IR falls; Wherein the connected mode of auxiliary electrode CE Electrode WE and contrast electrode RE represents with CE-WE-RE, and combined electrical chemical probe connected mode is 1-5,2-4,3.The area of Electrode WE and contrast electrode RE is 5cm
2;
Soil resistivity probe in the utility model is four electrode catheter E1～E4, adopts relatively low measuring voltage, and Accurate Determining soil resistivity avoids reading difficulty and soil electrolysis that high-tension measurement brings to cause physicochemical property to destroy; Redox measuring sonde adopts standard platinum electrode, copper sulfate eletrode to be used for measuring soil redox potential; On the polytetrafluoro insulation rod of multi-functional combination probe outside, fixedly high precision measuring temperature element is measured the soil moisture; Use pre-hole device method, very little and need not excavate to the destruction of soil original structure during measurement; Front end adopts conical design to guarantee there be good contacting between probe and soil.
Claims (10)
1. a portable soil corrosion speed measuring instrument, it is characterized in that: comprise oxidation-reduction potential measuring unit, soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit, wherein the digital signal of the simulating signal of oxidation-reduction potential measuring unit, soil resistivity measuring unit, the output of soil corrosion velocity survey unit after A/D converter is connected to CPU (central processing unit), and the signal wire of temperature measuring unit is connected to CPU (central processing unit); Oxidation-reduction potential measuring unit is connected to redox measuring sonde; Soil resistivity measuring unit, soil corrosion velocity survey unit and temperature measuring unit are connected to multi-functional combination probe.
2. by portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: described oxidation-reduction potential measuring unit comprises: first instrument operational amplifier (U10) and the first relay (JDQ1A), wherein the positive-negative input end of first instrument operational amplifier (U10) has redox measuring sonde by the first relay (DQ1A) contact through interface (J2) termination, and the output terminal of instrumentation amplifier (U10) is connected to A/D converter.
3. portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: described soil resistivity measuring unit comprises: the first dual operational amplifier (U4A-U4B), relay, second instrument operational amplifier (U7) and the 3rd instrumentation amplifier (U2), wherein the positive-negative input end of the first dual operational amplifier (U4A-U4B) is connected to respectively the output signal of reference voltage and D/A converter, the first ring that the output terminal of the first dual operational amplifier (U4A-U4B) is popped one's head in the soil resistivity in multi-functional combination probe by the contact of relay is connected, second of soil resistivity probe, three rings are just being connected to second instrument operational amplifier (U7) by the contact of relay respectively, negative input end, the Fourth Ring of soil resistivity probe is connected to the positive input terminal of the 3rd instrumentation amplifier (U2) by the contact of relay, and be connected to the feedback signal input end of the first dual operational amplifier (U4A-U4B), the negative input end ground connection of the 3rd instrumentation amplifier (U2), the output terminal of second instrument operational amplifier (U7) and the 3rd instrumentation amplifier (U2) is connected with A/D converter.
4. by portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: described soil corrosion velocity survey unit comprises D/A converter, voltage-reference, second, the 3rd dual operational amplifier (U25A-U25B, U5A-U5B), relay, wherein D/A converter input end is connected to the control signal of CPU (central processing unit), the output terminal of D/A converter is connected to respectively the positive input terminal of the first dual operational amplifier (U4A-U4B) and the 3rd dual operational amplifier (U5A-U5B), the 3rd dual operational amplifier (U5A-U5B) negative input termination power supply benchmark, the output terminal of the 3rd dual operational amplifier (U5A-U5B) is connected to first ring and the five rings of the corrosion rate probe in multi-functional combination probe by relay tip, the positive input terminal ground connection of the second dual operational amplifier (U25A-U25B), negative input end connects the second ring and Fourth Ring of corrosion rate probe by relay, output terminal is connected to A/D converter, the positive input terminal of the second dual operational amplifier (U25A-U25B) connects the 3rd ring of corrosion rate probe by relay, output terminal is connected to A/D converter, feed back to the negative input end of the B amplifier (U5B) of the 3rd dual operational amplifier (U5A-U5B) simultaneously.
5. by portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: also there is soil moisture measuring unit, by the numerical value of the direct reading temperature sensor of CPU (central processing unit).
6. by portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: multi-functional combination probe is bar-shaped, there is a cored screw, screw rod outside is insulation rod, the corrosion rate probe and the temperature sensor that on insulation rod, distribute and have multielectrode soil resistivity probe, have a plurality of detection rings, each probe and sensor signal lines are passed in cored screw.
7. by portable soil corrosion speed measuring instrument claimed in claim 6, it is characterized in that: described soil resistivity probe is four electrodes, and corrosion rate probe is five detection rings.
8. by portable soil corrosion speed measuring instrument claimed in claim 6, it is characterized in that: the front end of described multi-functional combination probe is taper.
9. by portable soil corrosion speed measuring instrument claimed in claim 1, it is characterized in that: described redox measuring sonde is standard platinum electrode, copper sulfate eletrode.
10. by the portable soil corrosion speed measuring instrument described in claim 2,3 or 4, it is characterized in that: each relay is twin coil magnetic latching relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780409.0U CN203561608U (en) | 2013-11-28 | 2013-11-28 | Portable soil corrosion speed measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780409.0U CN203561608U (en) | 2013-11-28 | 2013-11-28 | Portable soil corrosion speed measuring instrument |
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| Publication Number | Publication Date |
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| CN203561608U true CN203561608U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320780409.0U Expired - Lifetime CN203561608U (en) | 2013-11-28 | 2013-11-28 | Portable soil corrosion speed measuring instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390907A (en) * | 2014-10-24 | 2015-03-04 | 海南电力技术研究院 | Four-electrode soil corrosion detection probe |
| CN105424773A (en) * | 2015-11-05 | 2016-03-23 | 中国石油天然气股份有限公司 | Electrolytic tank for soil corrosion electrochemical experiment |
| CN105973794A (en) * | 2016-05-30 | 2016-09-28 | 中国科学院金属研究所 | Atmospheric corrosivity monitoring equipment |
| CN107764730A (en) * | 2016-08-18 | 2018-03-06 | 国家电网公司 | The design method of metallic ground material corrosion allowance in a kind of power system |
| CN112326926A (en) * | 2020-10-19 | 2021-02-05 | 南方电网科学研究院有限责任公司 | Corrosion measuring device for soil at tower foot of power transmission line |
| CN112577997A (en) * | 2020-11-24 | 2021-03-30 | 国网陕西省电力公司电力科学研究院 | Ultrahigh-voltage direct-current grounding electrode soil corrosion monitoring device and method |
-
2013
- 2013-11-28 CN CN201320780409.0U patent/CN203561608U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390907A (en) * | 2014-10-24 | 2015-03-04 | 海南电力技术研究院 | Four-electrode soil corrosion detection probe |
| CN105424773A (en) * | 2015-11-05 | 2016-03-23 | 中国石油天然气股份有限公司 | Electrolytic tank for soil corrosion electrochemical experiment |
| CN105973794A (en) * | 2016-05-30 | 2016-09-28 | 中国科学院金属研究所 | Atmospheric corrosivity monitoring equipment |
| CN107764730A (en) * | 2016-08-18 | 2018-03-06 | 国家电网公司 | The design method of metallic ground material corrosion allowance in a kind of power system |
| CN107764730B (en) * | 2016-08-18 | 2020-10-02 | 国家电网公司 | Design method for corrosion allowance of metal grounding material in power system |
| CN112326926A (en) * | 2020-10-19 | 2021-02-05 | 南方电网科学研究院有限责任公司 | Corrosion measuring device for soil at tower foot of power transmission line |
| CN112577997A (en) * | 2020-11-24 | 2021-03-30 | 国网陕西省电力公司电力科学研究院 | Ultrahigh-voltage direct-current grounding electrode soil corrosion monitoring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenyang Zhongke Corrosion Control Engineering Technology Center Assignor: INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES Contract record no.: 2017210000002 Denomination of utility model: Portable soil corrosion speed measuring instrument Granted publication date: 20140423 License type: Exclusive License Record date: 20170227 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
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| CX01 | Expiry of patent term |