CN110836922B - Device for detecting working state of reference electrode and working method thereof - Google Patents
Device for detecting working state of reference electrode and working method thereof Download PDFInfo
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Abstract
The invention discloses a device for detecting the working state of a reference electrode and a working method thereof, wherein the device comprises a test box, a base and a detection box, the non-installed reference electrode can be detected through the cooperative work of the test box and the detection box, and the non-installed reference electrode can be detected under the condition of simulating the influence of stray current; the working condition of the reference electrode which is not installed in the actual working process can be tested through the detection, and data support is provided for subsequent installation selection; and then, the working state of the installed reference electrode can be detected through the detection box, and once the reference electrode is found to be in an abnormal state, early warning can be carried out, so that the working personnel can stop the working of the reference electrode in time and carry out subsequent treatment. Therefore, the invention not only can realize the detection of the actual working state of the reference electrode under the influence of stray current before installation, but also can detect the working state of the installed reference electrode.
Description
Technical Field
The invention relates to a device for detecting the working state of a reference electrode and a working method thereof, belonging to the technical field of rail transit electrical equipment detection.
Background
The rail transit is used as a mode of public transportation, has the characteristics of safety, punctuality, rapidness, comfort and environmental protection, and therefore urban rail transit engineering is developed all over the world. At present, in urban rail transit engineering in China, a direct current traction power supply system is adopted, direct current is transmitted to a traction locomotive through a contact net or a contact rail, the traction locomotive drags a train to advance, and traction current is returned to a substation through a traveling rail. However, due to the limitations of the operating environment, economy and other aspects, the running rail cannot be completely insulated from the track bed structure, so that the traction current does not flow back to the traction substation from the steel rail, a part of the traction current flows into the ground from the steel rail, namely, the part is stray current, the stray current can corrode structural steel bars of urban rail transit, metal pipelines, buildings and other facilities along the line can be damaged, if the stray current flows into a grounding system, the ground potential can be raised, the use of part of facilities is seriously influenced, and the personal safety is further influenced.
In order to grasp the leakage condition of subway traction backflow and the corrosion degree of an underground metal structure by stray current, special measurement work is required. The risk index of the subway structure and equipment from being corroded by stray current is determined by the current density leaked from the surface of the structure to the surrounding electrolyte and the potential polarization shift caused by the current density. Since the current density is difficult to measure directly, the corrosion of the structure and the equipment by the stray current is generally determined by measuring the potential polarization deviation value of the structure caused by the stray current corrosion, which is an indirect index of the corrosion risk.
The reference electrode is used as a reference comparison electrode when measuring various electrode potentials, the stability of the electrode is good, and the good potential stability performance can be still ensured under the condition of large stray current, so that the reference electrode is commonly used in a subway stray current detection system and is used for acquiring polarization potential data of the reinforcing steel bars of the whole track bed structure; therefore, the normal work of the reference electrode is an important link for ensuring the stray current monitoring, and the quality of the reference electrode directly influences whether the data of the whole stray current monitoring system is accurate or not.
When the reference electrode is used, the reference electrode needs to be buried near a steel bar of a structure to be detected, the reference electrode needs to be completely buried in a concrete medium, and the reference electrode inputs a detection signal into a sensor positioned outside concrete only through a reserved connection wire, so that the installed reference electrode cannot judge whether the reference electrode normally works from the aspect of appearance, and meanwhile, the existing sensor has no function of detecting whether the reference electrode normally works, so that the working state of the reference electrode cannot be accurately mastered in the actual stray current monitoring process at present, and once the reference electrode works abnormally, the monitoring data of a stray current monitoring system is misaligned; in addition, the working state of the reference electrode is detected before the reference electrode is installed, but the existing detection method detects the situation that the reference electrode is not affected by the stray current, and whether the reference electrode can still keep the normal working state under the situation that the reference electrode is affected by the stray current cannot be known, so that the working state of the reference electrode is abnormal after the reference electrode is actually affected by the stray current after the reference electrode is installed, and if the abnormal working state occurs, a new reference electrode needs to be replaced again. Therefore, how to detect the actual working state of the reference electrode under the influence of stray current before installation and detect the actual working state of the reference electrode after installation are research directions of the industry.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a device for detecting the working state of a reference electrode and a working method thereof, which can detect the actual working state of the reference electrode under the influence of stray current before installation and can detect the working state of the installed reference electrode.
In order to achieve the purpose, the invention adopts the technical scheme that: a device for detecting the working state of a reference electrode comprises a test box, a base and a detection box, wherein the test box and the detection box are both arranged on the base;
the test box comprises a test box body, a galvanized iron column I and a galvanized iron column II, wherein the galvanized iron column I and the galvanized iron column II are both placed in the test box body, one end of the galvanized iron column I and one end of the galvanized iron column II extend out of the top of the test box body, and a solution injection hole and a reference electrode placing hole are formed in the top of the test box body;
the detection box comprises a detection box body, a measuring device, a touch display screen, a wiring terminal group, a forward power switch, a reverse power switch, a forward excitation power supply and a reverse excitation power supply; the touch display screen, the wiring terminal group, the forward power switch and the reverse power switch are arranged on the surface of the detection box body, the measuring device, the forward excitation power supply and the reverse excitation power supply are all arranged in the detection box body, the forward power switch and the forward excitation power supply are connected in series to form a forward excitation circuit, the reverse power switch and the reverse excitation power supply are connected in series to form a reverse excitation circuit, and the reverse excitation circuit is connected in parallel with the forward excitation circuit;
the wiring terminal group comprises a reference electrode wiring terminal, a power supply wiring terminal I and a power supply wiring terminal II; the measuring device comprises an analog quantity acquisition module, a data storage module and a main control module, wherein the main control module is respectively and electrically connected with the analog quantity acquisition module, the data storage module and the touch display screen, and the analog quantity acquisition module is electrically connected with the reference electrode wiring terminal; the touch display screen is used for inputting set parameters to the main control module and displaying data fed back by the main control module;
when the reference electrode which is not installed is detected, the reference electrode connecting terminal is communicated with the reference electrode through a connecting wire, and the power supply connecting terminal I and the power supply connecting terminal II are respectively communicated with one end of the galvanized iron column I and one end of the galvanized iron column II through the connecting wire; the method comprises the following steps that a forward power switch and a reverse power switch are sequentially switched on and off, forward stray current is applied to a test box body by a forward excitation power supply through a galvanized iron column I and a galvanized iron column II, reverse stray current is applied to the test box body by a reverse excitation power supply through the galvanized iron column I and the galvanized iron column II, potential of a reference electrode is detected and analyzed by a measuring device under the conditions that the reference electrode is not influenced by current, influenced by the forward stray current and influenced by the reverse stray current, and whether the reference electrode works normally or not is judged and displayed through a touch display screen;
when the installed reference electrode is detected, the reference electrode wiring terminal is communicated with the reference electrode through a connecting wire, and the measuring device performs potential detection analysis on the reference electrode in an actual working state, judges whether the reference electrode normally works and displays the potential through the touch display screen.
Further, the number of the reference electrode placing holes is three; the number of the reference electrode connecting terminals is three. The number of the reference electrode placing holes and the number of the reference electrode connection terminals are determined according to the number of the reference electrodes to be measured simultaneously.
The working method of the device for detecting the working state of the reference electrode comprises the following specific steps:
A. firstly, determining whether a reference electrode to be detected is installed or not, and if the reference electrode is not installed, entering the step B; if the reference electrode is installed, entering the step C;
B. the detection process of the reference electrode which is not installed comprises the following steps:
a. inputting a set reference potential V1, a set forward difference potential V2, a set reverse difference potential V3 and a set detection time length T1 to the main control module through the touch display screen, and storing the data received by the main control module in the data storage module;
b. injecting a test solution into the test box body through the solution injection hole, communicating the reference electrode wiring terminal with the reference electrode through a connecting wire, and communicating the power supply wiring terminal I and the power supply wiring terminal II with one end of the galvanized iron column I and one end of the galvanized iron column II through the connecting wire respectively; then, putting the reference electrode into the test box body through the reference electrode placing hole to be soaked in the test solution;
c. the analog quantity acquisition module of the testing device acquires the potential of the reference electrode for multiple times in the detection time length T1 and feeds the acquired potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, meanwhile, the main control module compares the potential value detected each time with the set reference potential V1, and if the potential value detected each time is smaller than the reference potential V1, the step d is carried out; otherwise, entering step f;
d. closing a forward power switch to enable a forward excitation power supply to apply forward stray current to the test solution through a galvanized iron column I and a galvanized iron column II, then acquiring the potential of the reference electrode in the state by an analog quantity acquisition module of the test device and feeding the potential back to a main control module, storing the detected potential value in a data storage module by the main control module, meanwhile, making a difference between the detected potential value and a reference potential V1 by the main control module, comparing the difference with a set forward difference potential V2, and if the difference is smaller than the forward difference potential V2, disconnecting the forward power switch and entering the step e; if not, the forward power switch is turned off and the step f is carried out;
e. closing a reverse power switch to enable a reverse excitation power supply to apply reverse stray current to the test solution through a galvanized iron column I and a galvanized iron column II, then acquiring the potential of the reference electrode in the state by an analog quantity acquisition module of the test device and feeding the potential back to a main control module, storing the detected potential value in a data storage module by the main control module, comparing the detected potential value with a reference potential V1 by the main control module, comparing the difference value with a set reverse difference potential V3, and disconnecting the reverse power switch if the difference value is less than the reverse difference potential V3, judging that the reference electrode is in a normal working state by the main control module, displaying the normal working state through a touch display screen, and completing the detection process of the reference electrode which is not installed; if not, the reverse power switch is turned off and the step f is carried out;
f. the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through the touch display screen to finish the detection process of the reference electrode which is not installed;
C. the detection process of the installed reference electrode comprises the following steps:
inputting a set reference potential V1, a detection time period (namely a determined parking time period without interference of stray current) and each detection time length T2 into a main control module through a touch display screen, and storing the data received by the main control module in a data storage module;
secondly, the reference electrode connecting terminal is communicated with the installed reference electrode through a connecting wire, and the power supply connecting terminal I is communicated with the drainage network through a connecting wire;
thirdly, when the test device is in the set detection time period, the analog quantity acquisition module of the test device acquires the potential of the reference electrode for a plurality of times in the detection time period T2 and feeds the potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, and simultaneously the main control module compares the potential value detected each time with the set reference potential V1,
if the potential value detected each time is less than or equal to the reference potential V1, the main control module judges that the reference electrode is in a normal working state and displays the normal working state through the touch display screen to finish the one-time detection process of the installed reference electrode; then, when the reference electrode works for a period of time and is in the set detection time period again, repeating the step two and the step three to finish the detection process;
if the detected potential value is larger than the reference potential V1, the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through the touch display screen, so that a worker can stop working of the reference electrode in time and perform subsequent treatment.
In the working method, the detection time length T1 and the detection time length T2 can be set within 5 minutes to 4 hours, wherein the default detection time length T1 is 2 hours, and the default detection time length T2 is 1 hour; the default reference potential V1 is 20mV, the forward difference potential V2 is 30mV, and the reverse difference potential V3 is 30 mV.
The above test solution was saturated Ca (OH)2And (3) solution. .
Compared with the prior art, the detection device has the advantages that the test box, the base and the detection box are combined, the detection can be carried out on the reference electrode which is not installed through the cooperative work of the test box and the detection box, and meanwhile, the detection can be carried out on the reference electrode which is not installed under the condition of simulating the stray current; the working condition of the reference electrode which is not installed in the actual working process can be tested through the detection, and data support is provided for subsequent installation selection; and then, the working state of the installed reference electrode can be detected through the detection box, and once the reference electrode is found to be in an abnormal state, early warning can be carried out, so that the working personnel can stop the working of the reference electrode in time and carry out subsequent treatment. Therefore, the invention not only can realize the detection of the actual working state of the reference electrode under the influence of stray current before installation, but also can detect the working state of the installed reference electrode.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the test chamber of the present invention;
FIG. 3 is a schematic view of the structure of the detection box of the present invention;
FIG. 4 is an electrical schematic of an embodiment of the present invention for detecting an unmounted reference electrode;
FIG. 5 is an electrical schematic of the detection of an installed reference electrode in an embodiment of the present invention.
In the figure: 1. the base, 2, the test box, 21, galvanized iron post I, 22, reference electrode place the hole, 23, galvanized iron post II, 24, the solution injection hole, 25, the test box, 3, the detection case, 31, reference electrode binding post, 32, power binding post I, 33, power binding post II, 34, measuring device, 35, touch display screen, 36, forward switch, 37, reverse switch, 38, forward excitation power, 39, reverse excitation power, 310, the detection box.
Detailed Description
The present invention will be further explained below.
Example (b): as shown in fig. 1 to 3, an apparatus for detecting the working state of a reference electrode comprises a test box 2, a base 1 and a detection box 3, wherein the test box 2 and the detection box 3 are both mounted on the base 1;
the test box 2 comprises a test box body 25, a galvanized iron column I21 and a galvanized iron column II 23, wherein the galvanized iron column I21 and the galvanized iron column II 23 are both placed in the test box body 25, one end of the galvanized iron column I21 and one end of the galvanized iron column II 23 both extend out of the top of the test box body 25, and a solution injection hole 24 and a reference electrode placing hole 22 are formed in the top of the test box body 25;
the detection box 3 comprises a detection box body 310, a measuring device 34, a touch display screen 35, a wiring terminal group, a forward power switch 36, a reverse power switch 37, a forward excitation power source 38 and a reverse excitation power source 39; the touch display screen 35, the wiring terminal group, the forward power switch 36 and the reverse power switch 37 are arranged on the surface of the detection box body 310, the measuring device 34, the forward excitation power source 38 and the reverse excitation power source 39 are all arranged in the detection box body 310, the forward power switch 36 and the forward excitation power source 38 are connected in series to form a forward excitation circuit, the reverse power switch 37 and the reverse excitation power source 39 are connected in series to form a reverse excitation circuit, and the reverse excitation circuit is connected with the forward excitation circuit in parallel;
the wiring terminal group comprises a reference electrode wiring terminal 31, a power supply wiring terminal I32 and a power supply wiring terminal II 33; the power supply wiring terminal I32 and the power supply wiring terminal II 33 are respectively connected with two ends of the forward excitation circuit, the measuring device 34 comprises an analog quantity acquisition module, a data storage module and a main control module, the main control module is respectively and electrically connected with the analog quantity acquisition module, the data storage module and the touch display screen 35, and the analog quantity acquisition module is electrically connected with the reference electrode wiring terminal 31; the touch display screen 35 is used for inputting set parameters to the main control module and displaying data fed back by the main control module;
the analog quantity acquisition module, the data storage module and the main control module are all existing equipment.
When the reference electrode which is not installed is detected, the reference electrode wiring terminal 31 is communicated with the reference electrode through a connecting wire, and the power supply wiring terminal I32 and the power supply wiring terminal II 33 are respectively communicated with one end of the galvanized iron column I21 and one end of the galvanized iron column II 23 through connecting wires; the forward power switch 36 and the reverse power switch 37 are sequentially switched on and off, at the moment, forward stray current is applied to the test box 25 by the forward excitation power source 38 through the galvanized iron column I21 and the galvanized iron column II 23, then reverse stray current is applied to the test box 25 by the reverse excitation power source 39 through the galvanized iron column I21 and the galvanized iron column II 23, and the measuring device 34 respectively performs potential detection analysis on the potential of the reference electrode under the conditions that the reference electrode is not influenced by current, influenced by the forward stray current and influenced by the reverse stray current, judges whether the reference electrode normally works and displays the potential through the touch display screen 35;
when the installed reference electrode is detected, the reference electrode wiring terminal 31 is communicated with the reference electrode through a connecting wire, and the measuring device 34 performs potential detection analysis on the reference electrode in an actual working state, and judges whether the reference electrode normally works and displays the potential through the touch display screen 35.
Further, the reference electrode placing holes 22 are three; the number of the reference electrode terminals 31 is three. The number of the reference electrode placing holes 22 and the reference electrode connection terminals 31 is determined according to the number of the reference electrodes to be measured simultaneously.
The working method of the device for detecting the working state of the reference electrode comprises the following specific steps:
A. firstly, determining whether a reference electrode to be detected is installed or not, and if the reference electrode is not installed, entering the step B; if the reference electrode is installed, entering the step C;
B. the detection process of the reference electrode which is not installed comprises the following steps:
a. the set reference potential V1, the forward difference potential V2, the reverse difference potential V3 and the detection time length T1 are input to the main control module through the touch display screen 35, and the main control module receives data and then stores the data in the data storage module;
b. injecting a test solution into the test box body 25 through the solution injection hole 24, communicating the reference electrode wiring terminal 31 with the reference electrode through a connecting wire, and communicating the power supply wiring terminal I32 and the power supply wiring terminal II 33 with one end of the galvanized iron column I21 and one end of the galvanized iron column II 23 through the connecting wire respectively; then, the reference electrode is placed in the test box 25 through the reference electrode placement hole 22 to be soaked in the test solution; as shown in fig. 4;
c. the analog quantity acquisition module of the test device 34 acquires the potential of the reference electrode for multiple times in the detection time period T1 and feeds the acquired potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, meanwhile, the main control module compares the potential value detected each time with the set reference potential V1, and if the potential value detected each time is smaller than the reference potential V1, the step d is executed; otherwise, entering step f;
d. closing a forward power switch 36 to enable a forward excitation power source 38 to apply forward stray current to the test solution through a galvanized iron column I21 and a galvanized iron column II 23, then acquiring the potential of the reference electrode in the state by an analog quantity acquisition module of the test device 34 and feeding the potential back to a main control module, storing the detected potential value in a data storage module by the main control module, meanwhile, making a difference between the detected potential value and a reference potential V1 by the main control module, comparing the difference with a set forward difference potential V2, and if the difference is smaller than the forward difference potential V2, disconnecting the forward power switch 36 and entering the step e; if not, the forward power switch 36 is turned off and the process goes to step f;
e. closing a reverse power switch 37 to enable a reverse excitation power supply 39 to apply reverse stray current to the test solution through a galvanized iron column I21 and a galvanized iron column II 23, then acquiring the potential of the reference electrode in the state by an analog quantity acquisition module of the test device 34 and feeding the potential back to a main control module, storing the detected potential value in a data storage module by the main control module, meanwhile, making a difference between the detected potential value and a reference potential V1 by the main control module, comparing the difference value with a set reverse difference potential V3, and disconnecting the reverse power switch 37 if the difference value is smaller than the reverse difference potential V3, and simultaneously judging that the reference electrode is in a normal working state by the main control module and displaying the reference electrode through a touch display screen 35 to finish the detection process of the reference electrode which is not installed; if not, the reverse power switch 37 is turned off and the process goes to step f;
f. the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through the touch display screen 35 to finish the detection process of the reference electrode which is not installed;
C. the detection process of the installed reference electrode comprises the following steps:
inputting a set reference potential V1, a detection time period (namely a determined parking time period without interference of stray current) and each detection time length T2 into a main control module through a touch display screen 35, and storing the data received by the main control module in a data storage module;
secondly, the reference electrode connecting terminal 31 is communicated with the installed reference electrode through a connecting wire, and the power supply connecting terminal I32 is communicated with the drainage network through a connecting wire; as shown in fig. 5;
thirdly, when the test device is in the set detection time period, the analog quantity acquisition module of the test device 34 acquires the potential of the reference electrode for a plurality of times in the detection time period T2 and feeds the acquired potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, and simultaneously the main control module compares the potential value detected each time with the set reference potential V1,
if the potential value detected each time is less than or equal to the reference potential V1, the main control module judges that the reference electrode is in a normal working state and displays the working state through the touch display screen 35, and the one-time detection process of the installed reference electrode is completed; then, when the reference electrode works for a period of time and is in the set detection time period again, repeating the step two and the step three to finish the detection process;
if the detected potential value is larger than the reference potential V1, the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through the touch display screen 35, so that a worker can stop working of the reference electrode in time and perform subsequent treatment.
In the working method, the detection time length T1 and the detection time length T2 can be set within 5 minutes to 4 hours, wherein the default detection time length T1 is 2 hours, and the default detection time length T2 is 1 hour; the default reference potential V1 is 20mV, the forward difference potential V2 is 30mV, and the reverse difference potential V3 is 30 mV.
The above test solution was saturated Ca (OH)2And (3) solution.
Claims (6)
1. A device for detecting the working state of a reference electrode is characterized by comprising a test box (2), a base (1) and a detection box (3), wherein the test box (2) and the detection box (3) are both arranged on the base (1);
the test box (2) comprises a test box body (25), a galvanized iron column I (21) and a galvanized iron column II (23), the galvanized iron column I (21) and the galvanized iron column II (23) are placed in the test box body (25), one end of the galvanized iron column I (21) and one end of the galvanized iron column II (23) extend out of the top of the test box body (25), and a solution injection hole (24) and a reference electrode placing hole (22) are formed in the top of the test box body (25);
the detection box (3) comprises a detection box body (310), a measuring device (34), a touch display screen (35), a wiring terminal group, a forward power switch (36), a reverse power switch (37), a forward excitation power supply (38) and a reverse excitation power supply (39); the touch display screen (35), the wiring terminal group, the forward power switch (36) and the reverse power switch (37) are arranged on the surface of the detection box body (310), the measuring device (34), the forward excitation power supply (38) and the reverse excitation power supply (39) are all arranged in the detection box body (310), the forward power switch (36) and the forward excitation power supply (38) are connected in series to form a forward excitation circuit, the reverse power switch (37) and the reverse excitation power supply (39) are connected in series to form a reverse excitation circuit, and the reverse excitation circuit is connected with the forward excitation circuit in parallel;
the wiring terminal group comprises a reference electrode wiring terminal (31), a power supply wiring terminal I (32) and a power supply wiring terminal II (33); the measuring device (34) comprises an analog quantity acquisition module, a data storage module and a main control module, the main control module is electrically connected with the analog quantity acquisition module, the data storage module and the touch display screen (35) respectively, and the analog quantity acquisition module is electrically connected with the reference electrode wiring terminal (31); the touch display screen (35) is used for inputting set parameters to the main control module and displaying data fed back by the main control module;
when the reference electrode which is not installed is detected, the reference electrode connecting terminal (31) is communicated with the reference electrode through a connecting wire, and the power supply connecting terminal I (32) and the power supply connecting terminal II (33) are respectively communicated with one end of the galvanized iron column I (21) and one end of the galvanized iron column II (23) through connecting wires; the forward power switch (36) and the reverse power switch (37) are sequentially switched on and off, at the moment, forward stray current is applied to the test box body (25) by the forward excitation power supply (38) through the galvanized iron column I (21) and the galvanized iron column II (23), then reverse stray current is applied to the test box body (25) by the reverse excitation power supply (39) through the galvanized iron column I (21) and the galvanized iron column II (23), and the potential of the reference electrode is detected and analyzed by the measuring device (34) under the conditions that the reference electrode is not influenced by current, is influenced by the forward stray current and is influenced by the reverse stray current, so that whether the reference electrode normally works or not is judged and displayed by the touch display screen (35);
when the installed reference electrode is detected, the reference electrode wiring terminal (31) is communicated with the reference electrode through a connecting wire, the measuring device (34) performs potential detection analysis on the reference electrode in an actual working state, and whether the reference electrode works normally or not is judged and displayed through the touch display screen (35).
2. The apparatus for detecting the operating state of a reference electrode according to claim 1, wherein the number of the reference electrode placing holes (22) is three.
3. The device for detecting the operating state of a reference electrode according to claim 2, wherein the number of reference electrode terminals (31) is three.
4. The working method of the device for detecting the working state of the reference electrode according to claim 1 is characterized by comprising the following specific steps:
A. firstly, determining whether a reference electrode to be detected is installed or not, and if the reference electrode is not installed, entering the step B; if the reference electrode is installed, entering the step C;
B. the detection process of the reference electrode which is not installed comprises the following steps:
a. the set reference potential V1, the forward difference potential V2, the reverse difference potential V3 and the detection time length T1 are input to the main control module through a touch display screen (35), and the main control module receives data and then stores the data in the data storage module;
b. injecting a test solution into the test box body (25) through the solution injection hole (24), communicating the reference electrode wiring terminal (31) with the reference electrode through a connecting wire, and communicating the power supply wiring terminal I (32) and the power supply wiring terminal II (33) with one end of the galvanized iron column I (21) and one end of the galvanized iron column II (23) through the connecting wire respectively; then, the reference electrode is placed into a test box body (25) through a reference electrode placing hole (22) to be soaked in the test solution;
c. the analog quantity acquisition module of the testing device (34) acquires the potential of the reference electrode for multiple times in the detection time length T1 and feeds the potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, meanwhile, the main control module compares the potential value detected each time with the set reference potential V1, and if the potential value detected each time is smaller than the reference potential V1, the step d is carried out; otherwise, entering step f;
d. closing a forward power switch (36), enabling a forward excitation power supply (38) to apply forward stray current to the test solution through a galvanized iron column I (21) and a galvanized iron column II (23), then enabling an analog quantity acquisition module of the test device (34) to acquire the potential of the reference electrode in the state and feed back the potential to a main control module, storing the detected potential value in a data storage module by the main control module, meanwhile, enabling the detected potential value to be different from a reference potential V1 by the main control module, comparing the difference with a set forward difference potential V2, and enabling the forward power switch (36) to be disconnected and entering the step e if the difference is smaller than the forward difference potential V2; if not, turning off the forward power switch (36) and entering step f;
e. closing a reverse power switch (37), enabling a reverse excitation power supply (39) to apply reverse stray current to the test solution through a galvanized iron column I (21) and a galvanized iron column II (23), then acquiring the potential of a reference electrode in the state by an analog quantity acquisition module of a testing device (34) and feeding the potential back to a main control module, storing the detected potential value in a data storage module by the main control module, simultaneously making a difference between the detected potential value and a reference potential V1 by the main control module, comparing the difference value with a set reverse difference potential V3, and disconnecting the reverse power switch (37) if the difference value is smaller than a reverse difference potential V3, and simultaneously judging that the reference electrode is in a normal working state by the main control module and displaying the reference electrode through a touch display screen (35) to finish the detection process of the reference electrode which is not installed; if not, turning off the reverse power switch (37) and proceeding to step f;
f. the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through a touch display screen (35) to finish the detection process of the reference electrode which is not installed;
C. the detection process of the installed reference electrode comprises the following steps:
firstly, inputting a set reference potential V1, a detection time period and each detection time length T2 to a main control module through a touch display screen (35), and storing the data in a data storage module after the main control module receives the data;
secondly, a reference electrode connecting terminal (31) is communicated with an installed reference electrode through a connecting wire, and a power supply connecting terminal I (32) is communicated with a drainage network through a connecting wire;
thirdly, when the test device is in the set detection time period, the analog quantity acquisition module of the test device (34) acquires the potential of the reference electrode for a plurality of times in the detection time period T2 and feeds the potential back to the main control module, the main control module stores the potential value detected each time in the data storage module, and simultaneously the main control module compares the potential value detected each time with the set reference potential V1,
if the potential value detected each time is less than or equal to the reference potential V1, the main control module judges that the reference electrode is in a normal working state and displays the reference electrode through the touch display screen (35), and the one-time detection process of the installed reference electrode is completed; then, when the reference electrode works for a period of time and is in the set detection time period again, repeating the step two and the step three to finish the detection process;
if the detected potential value is larger than the reference potential V1, the main control module judges that the reference electrode is in an abnormal working state and displays the abnormal working state through the touch display screen (35), so that a worker can stop the working of the reference electrode in time and perform subsequent treatment.
5. The method of claim 4, wherein the detection time period T1 is 2 hours, and the detection time period T2 is 1 hour; the reference potential V1 was 20mV, the forward difference potential V2 was 30mV, and the reverse difference potential V3 was 30 mV.
6. The method of claim 4, wherein the test solution is saturated Ca (OH)2And (3) solution.
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