CN106940417A - The monitoring device and method of state of insulation between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement - Google Patents

Abstract

The invention provides insulation state monitoring device between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement, it is connected with dissimilar metal galvanic couple structure to be monitored, and monitoring device includes：Processing unit；First controlled resistor unit, with different resistance R_xiMeasurement resistive module, and be connected to one by one between the first hardware and the second hardware；Measuring unit, it is detected and each resistance R_xiCorresponding magnitude of voltage V_i；Wherein, processing unit obtains actual measurement insulation isopleth, and the actual measurement insulated into isopleth and the alarm that the prestores isopleth that insulate is compared, and judges state of insulation.In addition, present invention also offers corresponding monitoring method.The present invention can monitor the state of insulation of dissimilar metal galvanic couple structure, maintenance and replacing for insulating materials between galvanic couple provide foundation, the present invention is used in combination with the technique that is electrically insulated between dissimilar metal galvanic couple, effectively can reduce and prevent the electrochemical corrosion of dissimilar metal galvanic couple structure.

Description

The monitoring of state of insulation between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement Apparatus and method

Technical field

The present invention relates to a kind of prison of state of insulation between a kind of monitoring device of state of insulation and method, more particularly to galvanic couple Survey apparatus and method.

Background technology

The dissimilar metal connecting portion of ship's fitting, piping, such as copper valve passes through ring flange and bolt and steel ship Body is fixedly connected, and constitutes galvanic couple structure under the effect of the electrolyte such as seawater, Galvanic Current is formed in the case where being directly connected to, produce Raw electrochemical corrosion.In the device structure such as naval vessel hull and valve, piping between the fastening joint portion of different metal materials generally Completely cut off using insulating materials, the technology is initially used to the protection against electric filed on naval vessel, in practice, the technology is to prevent and reduce again The effective ways of electrochemical corrosion between dissimilar metal, can completely cut off Galvanic Current, reduce and avoid intermetallic electrochemical corrosion, Therefore increasingly paid attention in the construction of ship construction and offshore engineering equipment.

Because some dissimilar metal structural members are chronically at the bad working environments bar of metal structure STRESS VARIATION and Seawater Under part, the insulating materials being installed between dissimilar metal causes insulating properties there may be accidental damage, or insulating materials aging Failure, and then cause dissimilar metal structural member to produce serious electrochemical corrosion.Therefore, pacify between substantial amounts of equipment and piping After the material for filling these electric insulation protection structures, during equipment is run, it is necessary to what is installed in dissimilar metal structural member The state of insulation of insulating materials carries out continuously on-line monitoring or periodically itinerant monitor system, to the integrity for the protection structure that is electrically insulated, The performance state of especially insulating materials is estimated and judged, causes insulation values to drop to a certain set to be damaged in insulating materials Fixed number value alarm is pointed out, and then takes the measure repaired or change insulating materials, to avoid dissimilar metal structure due to electrification Learn damage failure caused by corrosion.

In protection against electric filed application, the state of insulation of the insulating materials between monitoring dissimilar metal generally uses dissimilar metal Between direct potential monitoring and AC resistance monitoring method, in actual use, when destructive damage occurs for insulation system When, metal structure drastically declines close to direct short-circuit, monitoring current potential, and resistance value is close to zero, and such a method can obtain bright Aobvious monitoring result.But in electrochemical corrosion application between preventing dissimilar metal, there is presently no for exhausted dissimilar metal The effective monitoring instrument of the status monitoring of edge structure.It was verified that the monitoring insulating materials state of insulation dissimilar metal Especially long term monitoring, and the monitoring to the slow aged deterioration of the insulating materials in Seawater to failure of insulation, directly The method of potential monitoring can measure and record the variation tendency of potential difference data, but be difficult to obtain standard because data are excessively wide in range True criterion；And due to the effect of Seawater, AC resistance monitoring method also can not accurately measure the resistance of insulating materials.By In drawbacks described above, existing direct potential monitoring method and AC resistance monitoring method are only relied on, it is impossible to exhausted dissimilar metal Edge material carries out effective status monitoring and insulating properties judge.

The content of the invention

An object of the present invention is to provide a kind of monitoring device of state of insulation between galvanic couple, and it can monitor dissimilar metal electricity State of insulation in even structure between dissimilar metal galvanic couple, safeguards for the insulation between dissimilar metal galvanic couple and provides foundation, so that Effectively reduce and prevent the electrochemical corrosion of dissimilar metal galvanic couple structure.

In order to reach the purpose of foregoing invention, the invention provides a kind of electricity that insulation isopleth is obtained based on voltage measurement Insulation state monitoring device between idol, it is connected with dissimilar metal galvanic couple structure to be monitored, the dissimilar metal galvanic couple structure bag The first hardware is included, the second hardware being connected with the first hardware, and located at the first hardware and the second gold medal Belong to the insulator between element, first hardware and the second hardware are made up of different metals respectively；The prison Surveying device includes：

Processing unit；

First controlled resistor unit, it is connected with processing unit, the first controlled resistor unit include several first Resistance and first control circuit, the first control circuit is according to being received from the control signal of processing unit by several the first electricity At least one combination in resistance is connected as multiple with different resistance R_xiMeasurement resistive module, the multiple measurement resistive module It is connected to one by one between the first hardware and the second hardware；

Measuring unit, it is connected with processing unit, the measuring unit detection and each resistance R_xiCorresponding first metal Magnitude of voltage V between element and the second hardware_i；

Wherein, the processing unit receives the magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd it is right with it The magnitude of voltage V answered_iActual measurement insulation isopleth is obtained, the processing unit insulate actual measurement insulation isopleth and the alarm prestored Isopleth is compared, and judges the state of insulation between the first hardware and the second hardware according to comparison result.

In the above-mentioned technical solutions, the first hardware and the second number of packages element are by being mounted with insulating sleeve and felt pad The bolt connection of piece.

Insulation state monitoring device is by surveying between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Measure the different resistance R of galvanic couple two ends correspondence_xiMagnitude of voltage V_i, the actual insulation isopleth of acquisition and the alarm prestored are insulated equivalent Line is compared, and the comparison is typically based on intuitively figure alignments, and state of insulation galvanic couple is carried out according to comparison result Judge.Its general principle will be described in detail in embodiment part with reference to accompanying drawing.

Insulation state monitoring device can be used between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Ship and ocean engineering field.

Between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement in insulation state monitoring device：

The dissimilar metal galvanic couple structure to be monitored commonly used in shipbuilding is generally by No. 20 mild steel, bronze (ZCuSn₁₀Zn₂), TP2Y copper alloys, B10 corronils, B30 copper alloys, 921A steel, HDR two phase stainless steels, 316L stainless steels, The multiple material of 304 stainless steels etc. ten is combined with each other composition.

The actual measurement insulation isopleth is often referred to same dissimilar metal galvanic couple structure to be monitored, corresponding to a determination Equivalent insulaion resistance R, by different resistance R_xiMeasurement resistive module when gradually accessing galvanic couple structure to be monitored, measurement is each Measure the magnitude of voltage V at resistive module two ends_i, with reference to corresponding resistance R_xi, the curve that fitting connection is formed on V-R coordinates, V-R V characterizes voltage in coordinate, and R characterizes resistance.

The program is not directly based upon the resistance R of the measurement resistive module by calculating_xiWith the magnitude of voltage V_iObtain The actual measurement insulation isopleth.Measured data is processed as figure shows to replace the direct approximate calculation of insulation values by this method, The deviation of approximate calculation can be made up, the insulating materials between the first hardware and the second hardware is more reasonably assessed Insulation value changes.

The quantity and resistance of the first resistor are selected according to measurement object, and resistance is usually tens of Ohms to thousands of Europe Nurse.The first control circuit can switch relay by single-chip microcomputer to carry out selecting combination to obtain different resistance R_xiMeasurement electricity Hinder module, corresponding reality output resistance R_xiDetermination can be adjusted according to actual object of measurement.

The processing unit can be monitoring microcomputer, and it receives the magnitude of voltage V that measuring unit is uploaded_i, and according to preset journey Magnitude of voltage V described in ordered pair_iCarry out data processing and curve matching draws actual measurement insulation isopleth.

Whether insulating materials needs alarm between the present invention program judges galvanic couple.In the liquid electrolytes such as seawater, with industry In the standard generally approved, insulating materials performance degradation causes corrosion between the galvanic couple that monitored dissimilar metal galvanic couple structure is produced Electric current, which is incrementally increased, reaches that critical insulation resistance value corresponding when needing alarm is defined as R_bj.In engineer applied, R_bjCan be Starting stage between first hardware and the second hardware after installation insulating materials measures and is subject to approximate calculation Obtain, its general principle will be described in detail in embodiment part with reference to accompanying drawing.Based on above-mentioned R_bjPhase can be obtained The alarm insulation isopleth answered, it can also be obtained by surveying the similar method of insulation isopleth with above-mentioned acquisition, will be rear Text is described in detail.

It should be noted that the processing unit can also include database, it can store dissimilar metal galvanic couple structure Insulation isopleth historical data, the performance trend analysis for the insulator of dissimilar metal galvanic couple structure provides foundation, help phase Pass department grasps dissimilar metal galvanic couple structure behaviour in service, reliable basis is provided for maintenance department, so as to be greatly lowered for example Electrochemical corrosion between the dissimilar metals such as hull, valve member, the pump housing, pipeline, ring flange, significantly reduce the maintenance on such as naval vessel into This, improves the security of such as maritime applications system.

When insulation state monitoring device works between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement, It is R that the usual first controlled resistor unit, which often switches one resistance of connection,_xiMeasurement resistive module, measuring unit just detects one The secondary corresponding measurement resistive module corresponding magnitude of voltage V in two ends_i, processing unit just records a corresponding measuring point data, so by Pacing amount, processing unit obtains all measuring point datas corresponding with all measurement resistive modules.Due to measurement process correspondence galvanic couple Between one of insulation system determination equivalent insulaion resistance R, all measuring point datas are all corresponding with the equivalent insulaion resistance R, because This, which calculates whole measuring point datas to handle and be fitted to connect, has just obtained actual measurement insulation isopleth.Then processing unit surveys this Insulation isopleth is compared with the alarm insulation isopleth prestored, and the first hardware and the second gold medal are judged according to comparison result Belong to the state of insulation between element, i.e. state of insulation between dissimilar metal galvanic couple.

Therefore, the monitoring device of state of insulation can monitor xenogenesis in dissimilar metal galvanic couple structure between galvanic couple of the present invention State of insulation between metal galvanic couple, safeguards for the insulation between dissimilar metal galvanic couple and provides foundation, so as to effectively reduce and anti- The only electrochemical corrosion of dissimilar metal galvanic couple structure.It especially can effectively judge different in the liquid electrolyte media such as seawater Whether the insulation planted between metal galvanic couple fails, and thereby guarantees that between the dissimilar metals such as hull, valve member, the pump housing, pipeline, ring flange It is mounted with after electric insulation protection structure, can effectively monitors the integrity of insulating materials in these structures, thus reach and subtract Less and prevent ship's fitting, the purpose of the electrochemical corrosion of the dissimilar metal connecting portion of piping.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement In putting, the processing unit will also be surveyed failure insulation isopleth of the insulation isopleth with prestoring and is compared.

Whether insulating materials fails between such scheme judges galvanic couple.In the liquid electrolytes such as seawater, with usual in industry The standard of accreditation, corrosion current enters between insulating materials performance degradation causes the galvanic couple that monitored dissimilar metal galvanic couple structure is produced One step, which increases, reaches that critical insulation resistance value corresponding when can consider insulation failure is defined as R_sx.In engineer applied, R_sxCan install the starting stage after insulating materials between the first hardware and the second hardware measures and is subject to Approximate calculation is obtained, and its general principle will be described in detail in embodiment part with reference to accompanying drawing.Based on above-mentioned R_bjWith R_sxCorresponding alarm insulation isopleth and failure insulation isopleth can be obtained, it can also insulate by being surveyed with above-mentioned acquisition The similar method of isopleth is obtained, and will be described later.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Putting also includes：

Second controlled resistor unit, it is connected with processing unit, the second controlled resistor unit include several second Resistance and second control circuit, the second control circuit is according to being received from the control signal of processing unit by several the second electricity At least one combination in resistance is connected as insulation alarm resistive module and/or failure of insulation resistive module, the insulation alarm electricity Resistance module has insulation alarm resistance value R_bj, the failure of insulation resistive module has failure of insulation resistance value R_sx, the insulation Alarm resistive module or failure of insulation resistive module are connected between the first hardware and the second hardware；

When insulation alarm resistive module is connected between the first hardware and the second hardware, the processing unit Receive the magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain alarm insulation etc. It is worth line, the alarm insulate isopleth by as the alarm insulation isopleth prestored；

When failure of insulation resistive module is connected between the first hardware and the second hardware, the processing unit Receive the magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain failure insulation etc. It is worth line, the failure insulate isopleth by as the failure insulation isopleth prestored.

In such scheme, the alarm insulation isopleth or failure insulation isopleth are often referred to same xenogenesis to be monitored Metal galvanic couple structure, corresponding to an insulation alarm resistance value R_bjOr failure of insulation resistance value R_sx, by different resistance R_xiMeasurement When resistive module gradually accesses galvanic couple structure to be monitored, the magnitude of voltage V at each measurement resistive module two ends of measurement_i, with reference to phase The resistance R answered_xi, V characterizes voltage in the curve of fitting connection formation, V-R coordinates on V-R coordinates, and R characterizes resistance.

The program is not directly based upon the resistance R of the measurement resistive module by calculating_xiWith the magnitude of voltage V_iObtain The alarm insulation isopleth or failure insulation isopleth.It is critical exhausted to replace that measured data is processed as figure shows by this method The direct approximate calculation of edge value, can make up the deviation of approximate calculation, more reasonably demarcate the first hardware and the second gold medal Belong to the critical insulation values of the insulating materials between element.

The quantity and resistance of the second resistance are selected according to measurement object, and resistance is usually tens of Ohms to thousands of Europe Nurse.The second control circuit can switch relay by single-chip microcomputer to carry out selecting combination to obtain with insulation alarm resistance value R_bjInsulation alarm resistive module and/or with failure of insulation resistance value R_sxFailure of insulation resistive module, actually connect accordingly Meet resistance R_bjAnd/or connection resistance R_sxIt can be demarcated by actual measurement and calculating.

In order to obtain the actual measurement insulation isopleth of high-resolution, it usually needs the more different resistance R of access_xiMeasurement Resistive module, in order to reduce the quantity of measurement resistive module, inventor considers will be described some by the first control circuit Individual first resistor is combined connection, so as to obtain multiple with different resistance R_xiMeasurement resistive module；Similarly, for described Several described second resistances can be equally combined connection by second control circuit, so as to obtain with different resistance R_bjWith R_sxResistive module.Because measurement only needs to access a resistive module every time, therefore this method is feasible.Certainly, do not use This method and directly set it is multiple have different resistance R_xiMeasurement resistive module and multiple R with different resistances_bjAnd R_sx The present invention, but high cost can be realized, volume is big, belongs to a kind of deterioration scheme of the present invention, therefore also fall into the present invention and wanted Seek the scope of protection.

The processing unit can be monitoring microcomputer, and it receives the magnitude of voltage V that measuring unit is uploaded_i, and according to preset journey Magnitude of voltage V described in ordered pair_iCarry out data processing and curve matching draws the alarm insulation isopleth or failure insulation isopleth.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement In putting, the insulation isopleth is characterized as being V-R curves or I-R curves or V-I curves, and wherein V characterizes voltage, and R characterizes resistance, I characterizes electric current.

In such scheme, for apparent convenient observation, by V_iDivided by R_xiI can be obtained_i, I-R is converted into based on this Curve, so as to more protrude the curve state in the case of insulation values reduction, Galvanic Current increase.In addition it is also possible to change Into V-I curves, galvanic corrosion current drain energy is characterized in the case of state of insulation deterioration with apparent physical concept, The equivalent galvanic cell of galvanic couple externally exports being remarkably decreased for energy in measurement process.More compactly, in order to be adapted to portable instrument Use, area that can be to be surrounded with reference axis below integral and calculating curve shows with the mode of histogram or light beam figure.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement In putting, the processing unit also includes database, and it stores the insulation isopleth data of each dissimilar metal galvanic couple structure.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Putting also includes display unit, and it is connected with the processing unit, the data and letter of the display unit display processing unit transmission Number.

In such scheme, the data and signal can be the intuitively display and alarm to the state of insulation, can be with Including the actual measurement insulation isopleth and the alarm insulation isopleth prestored and/or failure insulation isopleth.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Putting also includes warning device, and it is connected with the processing unit.

In such scheme, generally when the state of insulation between the first hardware and the second hardware is judged as needs Alarm, then trigger the warning device and alarmed.The warning device can be sound and light alarm equipment.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Putting also includes power subsystem, and it is connected respectively with the first controlled resistor unit, measuring unit and processing unit, thinks that it is supplied Electricity.

In such scheme, the power subsystem can be configured as naval vessel multiple power source being converted into the described first controlled electricity Hinder the multiple power sources needed for unit, measuring unit and processing unit.

Further, insulation state monitoring is filled between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement In putting, the measuring unit also includes single-chip microcomputer, and the magnitude of voltage measured is converted to and be transferred to after data signal by the single-chip microcomputer Processing unit.

In such scheme, the measuring unit can also configure special chip pair using single-chip microcomputer digital processing unit as core The voltage signal measured carries out A/D conversions, passes through communication interface reception processing unit control command and the electric current number of upload conversion Word signal.

It is a further object of the present invention to provide insulated between a kind of monitoring galvanic couple without using above-mentioned second controlled resistor unit The monitoring method of state, it can monitor the state of insulation between dissimilar metal galvanic couple in dissimilar metal galvanic couple structure, be xenogenesis gold Belong to the insulation between galvanic couple and offer foundation is provided, so as to effectively reduce and prevent the electrochemical corrosion of dissimilar metal galvanic couple structure.

In order to reach the purpose of foregoing invention, do not include the second controlled resistor unit using above-mentioned the invention provides one kind Any monitoring device monitoring galvanic couple between state of insulation monitoring method, it includes step：

The failure insulation isopleth for obtaining the alarm insulation isopleth prestored and/or prestoring；

First controlled resistor unit is connected between the first hardware and the second hardware；

Processing unit controls the first controlled resistor unit to export several different resistance R_xi；

Measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i；

Processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and the actual measurement is insulated Isopleth is compared with the alarm insulation isopleth prestored and/or the failure insulation isopleth prestored, and according to comparison result Judge the state of insulation between the first hardware and the second hardware.

It is yet another object of the invention to provide the shape that insulated between a kind of monitoring galvanic couple using above-mentioned second controlled resistor unit The monitoring method of state, it can monitor the state of insulation between dissimilar metal galvanic couple in dissimilar metal galvanic couple structure, be dissimilar metal Insulation between galvanic couple, which is safeguarded, provides foundation, so as to effectively reduce and prevent the electrochemical corrosion of dissimilar metal galvanic couple structure.

In order to reach the purpose of foregoing invention, the invention provides it is a kind of using above-mentioned including the second controlled resistor unit The monitoring method of state of insulation between monitoring device monitoring galvanic couple, it includes step：

(1) first controlled resistor unit and the second controlled resistor unit are connected to the first hardware and the second metal Between element；

(2) processing unit controls the second controlled resistor unit output insulation alarm resistance value R_bj；

(3) processing unit controls the first controlled resistor unit to export several different resistance R_xi, each resistance of measuring unit detection Value R_xiCorresponding magnitude of voltage V_i, processing unit is according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain alarm insulation equivalent Line；

(4) connection of the second controlled resistor unit and the first hardware and the second hardware is disconnected；

(5) processing unit controls the first controlled resistor unit to export several different resistance R_xi；

(6) measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i；

(7) processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and this is surveyed Insulation isopleth is compared with the alarm insulation isopleth, and judges the first hardware and the second gold medal according to comparison result Belong to the state of insulation between element.

Further, between monitoring device monitoring galvanic couple of the present invention in the monitoring method of state of insulation, the insulation Resistance value of alarming R_bjBased on alarm Galvanic Current I_bjCalculating is obtained, the alarm Galvanic Current I_bjAccording to alarm rate of corrosion, institute is right The current density answered is based on averagely coupling electric current with the proportionate relationship of the maximum current density for directly coupling electric currentCalculating is obtained, The proportionate relationship of current density and the maximum current density for directly coupling electric current wherein corresponding to alarm rate of corrosion is this area What interior technical staff can be known, and the Galvanic Current I that alarms_bjWith averagely coupling electric currentProportionate relationship and alarm rate of corrosion institute Corresponding current density be with the proportionate relationship of the maximum current density for directly coupling electric current it is consistent, it is described averagely to couple electric currentVarious calculated based on following：

It is above-mentioned it is various in parameter be dissimilar metal galvanic couple structure to be monitored and measured under Seawater state, its In：Δ E is the voltage between the first hardware and the second hardware, R_xiSeveral are exported for the first controlled resistor unit not Same resistance, V_iEach resistance R is detected for measuring unit_xiCorresponding magnitude of voltage；r_iFor with R_xiCorresponding internal resistance,For average internal resistance.

Principle that such scheme is related to and implement by embodiment part with reference to accompanying drawing introduction.

Further, the monitoring method of state of insulation also includes step between the monitoring device monitoring galvanic couple of the invention described above：

First controlled resistor unit and the second controlled resistor unit are connected to the first hardware and the second metal member Between part；

Processing unit controls the second controlled resistor unit output failure of insulation resistance value R_sx, processing unit control is first controlled Resistance unit exports several different resistance R_xi, each resistance R of measuring unit detection_xiCorresponding magnitude of voltage V_i, processing unit according to Each resistance R_xiAnd corresponding magnitude of voltage V_iObtain failure insulation isopleth；

The processing unit enters the actual measurement insulation isopleth with alarm insulation isopleth and/or failure insulation isopleth Row is compared, and judges the state of insulation between the first hardware and the second hardware according to comparison result.

Further, between above-mentioned monitoring device monitoring galvanic couple in the monitoring method of state of insulation, the failure of insulation electricity Resistance R_sxBased on failure Galvanic Current I_sxCalculating is obtained, the failure Galvanic Current I_sxElectricity according to corresponding to failure rate of corrosion Current density and the proportionate relationship for directly coupling corresponding current density during electric current, based on averagely coupling electric currentCalculating is obtained, its Current density corresponding to middle failure rate of corrosion is this area with directly coupling the proportionate relationship of corresponding current density during electric current What interior technical staff can be known, and the Galvanic Current I that fails_sxWith averagely coupling electric currentProportionate relationship and failure rate of corrosion institute The proportionate relationship of corresponding current density current density corresponding with directly coupling electric current be it is consistent, it is described averagely to couple electric currentVarious calculated based on following：

It is above-mentioned it is various in parameter be dissimilar metal galvanic couple structure to be monitored and measured under Seawater state, its In：Δ E is the voltage between the first hardware and the second hardware, R_xiSeveral are exported for the first controlled resistor unit not Same resistance, V_iEach resistance R is detected for measuring unit_xiCorresponding magnitude of voltage；r_iFor with R_xiCorresponding internal resistance,For average internal resistance.

Principle that such scheme is related to and implement by embodiment part with reference to accompanying drawing introduction.

Further, it can sat in the monitoring method of state of insulation between monitoring device monitoring galvanic couple of the present invention Calculate the area surrounded below the insulation isopleth with reference axis in mark, and with the histogram or light suitable with the value of the area The mode of post figure characterizes the insulation isopleth.

Further, between above-mentioned monitoring device monitoring galvanic couple in the monitoring method of state of insulation, before the step (1) Processing unit controls the second controlled resistor unit output insulation alarm resistance value R_bj, and by itself and the first hardware and the second gold medal Belong to element connection, measuring unit measurement insulation alarm resistance value R_bjOn corresponding magnitude of voltage V_bj, it is then turned off the second controlled electricity The connection of unit and the first hardware and the second hardware is hindered, measuring unit monitors the first hardware and the second gold medal in real time Belong to the magnitude of voltage V between element, if magnitude of voltage V reaches p%V_bj, then the step (1) is carried out, wherein p% represents a threshold value hundred Divide ratio.

In such scheme, it will determine that magnitude of voltage V reaches p%V_bjIt is used as starting step (1) and its condition of subsequent step.Institute It is that those skilled in the art can choose according to actual conditions to state percentage p%, such as 90% or 100%.

Under insulation state monitoring device has between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement Row advantage and beneficial effect：

1) state of insulation between dissimilar metal galvanic couple in dissimilar metal galvanic couple structure can be monitored, be dissimilar metal galvanic couple it Between insulation is safeguarded and provides foundation, the present invention is used in combination with the technique that is electrically insulated between dissimilar metal galvanic couple, can effectively reduce With prevent the electrochemical corrosion of dissimilar metal galvanic couple structure.

2) can store dissimilar metal galvanic couple structure etc. insulation values curve historical data, be dissimilar metal galvanic couple structure The performance trend analysis of insulator provides foundation, helps relevant departments to grasp dissimilar metal galvanic couple structure behaviour in service, for maintenance Department provides reliable basis, so that the electricity between the dissimilar metal such as hull, valve member, the pump housing, pipeline, ring flange is greatly lowered Chemical attack, significantly reduces the maintenance cost on such as naval vessel, improves the security of such as maritime applications system.

The monitoring method of state of insulation equally has above-mentioned advantage and beneficial effect between monitoring galvanic couple of the present invention.

Brief description of the drawings

Fig. 1 is a kind of structure chart of dissimilar metal galvanic couple structure.

Fig. 2 is the equivalent circuit diagram of dissimilar metal galvanic couple structure in the electrolyte.

Fig. 3 be dissimilar metal galvanic couple structure in the electrolyte and access measurement resistive module equivalent circuit.

Fig. 4 is the V-R insulation isograms of dissimilar metal galvanic couple structure correspondence different insulative resistance.

Fig. 5 is the I-R insulation isograms of dissimilar metal galvanic couple structure correspondence different insulative resistance.

Fig. 6 is the V-I insulation isograms of dissimilar metal galvanic couple structure correspondence different insulative resistance.

Fig. 7 is the corresponding different insulative of dissimilar metal galvanic couple structure of isopleth of being insulated comprising alarm insulation isopleth and failure The I-R insulation isograms of resistance.

Fig. 8 for dissimilar metal galvanic couple structure etc. insulation values curve measuring principle figure.

Fig. 9 is calculating R_bjEquivalent circuit diagram.

Figure 10 is calculating R_sxEquivalent circuit diagram.

Figure 11 is the histogram of integral and calculating insulation isopleth area under formation.

Figure 12 is insulation state monitoring device between the galvanic couple of the present invention that insulation isopleth is obtained based on voltage measurement A kind of structural representation under embodiment.

Figure 13 be galvanic couple of the present invention between state of insulation monitoring method under a kind of embodiment flow signal Figure.

Figure 14 is that flow of the monitoring method under another embodiment of state of insulation between galvanic couple of the present invention is shown It is intended to.

Embodiment

Filled below insulation state monitoring the galvanic couple of the present invention that the isopleth that insulate is obtained based on voltage measurement Put before being further described in detail with method, the general principle of the present invention is first illustrated with reference to Figure of description.

Fig. 1 shows a kind of structure chart of dissimilar metal galvanic couple structure.

As shown in figure 1, the dissimilar metal galvanic couple structure includes the first hardware 1, the be connected with the first hardware 1 Two hardwares 2, and the insulator 3 between the first hardware 1 and the second hardware 2, the He of the first hardware 1 Second hardware 2 is made up of different metals respectively.It should be noted that for connecting the first hardware 1 and the second gold medal The fastening bolt for belonging to element 2 is provided with insulating bushing and insulation spacer.

Fig. 2 shows the equivalent circuit of dissimilar metal galvanic couple structure in the electrolyte.

As shown in Fig. 2 with reference to Fig. 1 is referred to, two kinds of different metal first hardwares 1 and the second hardware 2 are in example In such as seawater liquid electrolyte, according to electrochemical principle, an electromotive force can be equivalent to for Δ E, internal resistance is electric for r original Pond, after connecting portion installs insulation resistance value for R insulator 3, the electricity that an insulation resistance value is R is connected equivalent to galvanic cell two ends Resistance.

Fig. 3 show dissimilar metal galvanic couple structure in the electrolyte and access measurement resistive module equivalent circuit.Fig. 4 Show the V-R insulation isopleth of dissimilar metal galvanic couple structure correspondence different insulative resistance.Fig. 5 shows dissimilar metal galvanic couple knot The I-R insulation isopleth of structure correspondence different insulative resistance.Fig. 6 shows dissimilar metal galvanic couple structure correspondence different insulative resistance V-I insulation isopleth.

Fig. 1 and Fig. 2 is referred to as shown in figure 3, combining, in above-mentioned dissimilar metal galvanic couple structure two ends access resistance R_xiMeasurement Resistive module, measures the voltage V at measurement resistive module two ends_i。

According to parallel circuit computational methods, following formula (1) can be obtained：

Δ E is the potential difference of the first hardware 1 and the second hardware 2 in the electrolyte in formula (1).According to equation (1), to the insulation resistance value R of a specific insulator 3, R is gradually changed_xiResistance, can be calculated on V-R coordinates obtain with Corresponding V-R curves A1, B1, C1, D1, as shown in Figure 4；Or by V_iDivided by R_xiI can be obtained_i, it is converted into painting in I-R coordinates I-R curve A2, B2, C2, the D2 gone out, as shown in Figure 5；Or V-I curve A3, B3, C3, D3 for being drawn in V-I coordinates is converted into, such as Shown in Fig. 6；This curve is referred to as the isopleth that insulate.

Fig. 7 shows corresponding not for the dissimilar metal galvanic couple structure of insulated comprising alarming isopleth and failure insulation isopleth With the I-R insulation isopleth of insulation resistance value.

As shown in fig. 7, the transverse axis of coordinate system is measurement resistive module resistance, the longitudinal axis of coordinate system is measurement resistive module two Electric current obtained from terminal voltage divided by resistance.Equivalent circuit electromotive force Δ E, internal resistance is r, and the resistance of insulator 3 is insulation resistance value R.Insulation resistance value R is such as set in certain value such as R=R according to galvanic corrosion current density_sxJudge that state of insulation is in during=1k Ω Failure state, then insulation resistance value R_sx=1k Ω are failure of insulation resistance, and insulation resistance value R is measured by accessing measurement resistive module_sx The corresponding R of=1k Ω_xi、I_iObtain failure insulation isopleth A.Such as insulation resistance value R is reset according to galvanic corrosion current density to exist Certain value such as R=R_bjJudge that state of insulation is in alarm critical condition during=3k Ω, then insulation resistance value R=3k Ω are insulation alarm Critical resistance, different resistance R are accessed by changing_xiMeasurement resistive module and calculate that to obtain insulation resistance value R=3k Ω corresponding R_xi、I_iObtain alarm insulation isopleth B.Detect and calculate by access measurement resistive module and obtain actual insulation resistance R correspondences R_X、I_XInsulate isopleth, using the state of insulation between following rule judgment the first hardwares 1 and the second hardware 2： When the insulation isopleth C measured is located in the coordinate system above alarm insulation isopleth B, the He of the first hardware 1 is judged State of insulation between second hardware 2 is good；When insulating materials by using for a long time, insulation isopleth D is measured in the seat Be located in mark system below alarm insulation isopleth B, above failure insulation isopleth A when, judge the first hardware 1 and the second gold medal State of insulation between category element 2 will fail.When insulating materials performance degradation, insulation isopleth E is measured in the coordinate system When below failure insulation isopleth A, judge state of insulation between the first hardware 1 and the second hardware 2 Failure.

Described above is the result calculated according to formula (1), is also the equivalent line method institute foundation of insulation of the present invention Principle.In the present embodiment, the method for employing actual measurement, gradually accesses different resistance R_xiMeasurement resistive module, survey Measurement resistive module both end voltage value V_i, V-R curves are obtained in V-R coordinates.

Fig. 8 shows the measuring principle of the insulation isopleth of dissimilar metal galvanic couple structure.Fig. 9 shows calculating R_bjIt is equivalent Circuit, Figure 10 shows calculating R_sxEquivalent circuit.

Specific implementation step is as follows：

(1) isopleth that initially insulate is asked for.

At the beginning of insulating materials in dissimilar metal galvanic couple structure is installed, detect that state of insulation is good through dry state, pipeline leads to Enter seawater and galvanic couple structure two ends potential difference it is basicly stable after, according to the first controlled resistor unit X shown in Fig. 8, pass through Relay K_x1、K_x2…K_xiSwitch correspondence resistance R one by one_X1、R_X2…R_XiMeasurement resistive module access the first hardware and the Between two hardwares (i.e. in parallel with the equivalent circuit in Fig. 8), after measuring unit is accessed to each measurement resistive module respectively Actual measurement obtains corresponding magnitude of voltage V₁、V₂…V_i.Through processing unit process of fitting treatment and after being converted to I-R coordinates, correspondence is obtained initial State insulation resistance value R initial insulation isopleth, equivalent to the isopleth C that insulated in Fig. 7.

(2) average equivalent internal resistance is asked forAveragely couple electric current

At the beginning of insulating materials in dissimilar metal galvanic couple structure is installed, insulation values are typically up to more than tens of megaohms.Take The both end voltage difference now measured is Δ E, and in parallel resistance, works as R>>R_xi, by formula (2), formula (1) can approximately be reduced to formula And formula (4) (3)：

The R that will gradually be accessed in step (1)_XiRelevant voltage value V is obtained with actual measurement_iIt is real to substitute into formula (4), and according to formula (5) calculate and obtain average equivalent internal resistanceCalculated according to formula (6) and averagely coupled electric current.

What dissimilar metal galvanic couple structure two ends were directly connected to produce directly couples electric current I=Δs E/r and actually characterizes electricity The intensity of thermogalvanic corrision electric current.In the lab, the dissimilar metal being in Seawater is connected usually using zero internal resistance ammeter The two ends of galvanic couple structure, electric current is directly coupled to measure, and divided by the area of test piece obtain coupling current density.On actual naval vessel When sea water pump, valve, the insulation system two ends of pipeline carry out current measurement, because the depolarising of polarity effect and seawater velocity is made With, it is difficult to measure stable dissimilar metal and couple electric current, it is more difficult to calculate the metal erosion area inside pipeline.Present embodiment Using approximate calculation method, average equivalent internal resistance is obtained measuring and calculatingAfterwards, then calculate and averagely coupled electric currentRoot According to laboratory measurement and result of calculation, calculate being averaged of obtaining and couple electric currentIt is slightly less than the average value that actual measurement couples electric current, two Relatively, present embodiment uses and averagely couples electric current personFurther calculated.

(3) alarm insulation isopleth and failure insulation isopleth are obtained.

The calculating for critical insulation values of being alarmed in present embodiment, the rate of corrosion corresponding to corrosion depth for 0.1mm/ is right The leakage current of the corrosion electric current density answered, i.e. insulating barrier, maximum possible reaches the current density of about 8.6 microamperes/square centimeter. Generally by No. 20 mild steel, bronze (ZCuSn in shipbuilding₁₀Zn₂), TP2Y copper alloys, B10 corronils, B30 copper close Ten multiple materials such as gold, 921A steel, HDR two phase stainless steels, 316L stainless steels, 304 stainless steels are combined with each other the seawater pipe of composition Road galvanic couple structure, it directly couples the current density of electric current about in several microamperes/square centimeter between 40 microamperes/square centimeter. Therefore, calculated with relative value, the current density for directly coupling electric current equivalent to 20%.Approx, 20% is taken to be averaged and couple Electric current, that is, Galvanic Current of alarmingThe critical insulation values that fail correspond to the rate of corrosion that corrosion depth is 0.2mm/, Approx, 40% is taken to be averaged and couple electric current, that is, fail Galvanic CurrentIt is critical that alarm is calculated according to Fig. 9 and Figure 10 Insulation values R_bjWith the critical insulation values R that fails_sx, obtain

Pass through relay K in the second controlled resistor unit Y_y1OutputAccess dissimilar metal galvanic couple structure Two ends, first measurement record access R_bjBut not yet access R_xi, i.e. R_xiVoltage V during=∞_bj, then by the first controlled resistor list First X passes through relay K_x1、K_x2…K_xiGradually output R_x1、R_x2…R_xi, measure corresponding V₁、V₂…V_i, obtain alarm insulation equivalent Line.

Pass through relay K in the second controlled resistor unit Y_y2OutputAccess dissimilar metal galvanic couple knot Structure two ends, then pass through relay K by the first controlled resistor unit X_x1、K_x2…K_xiGradually output R_x1、R_x2…R_xi, measurement correspondence V₁、V₂…V_i, obtain failure insulation isopleth.

The critical insulation values R that alarms is set according to the concrete condition of equipment_bjWith the critical insulation values R that fails_sx, for example, settingThenAnd so on, the grade alarmed or failed can be done Go out more divisions.

The alarm as criterion property determined after being measured above in relation to specific standard equipment (seawater pipeline, valve) is insulated Isopleth and failure insulation isopleth, no longer change once generation is stored in database, are used in daily monitoring with real Insulation isopleth is surveyed to be compared.

Wherein R is accessed in measurement alarm insulation isopleth_bjBut R_xiVoltage V during=∞_bj, it is used as special threshold value electricity Pressure is recorded in database, applied to daily galvanic couple two ends potential monitoring.

(4) monitoring of actual insulation state.

In the first controlled resistor unit X shown in Fig. 8, R is gradually output_x1、R_x2…R_xi, measure corresponding V₁、V₂…V_i, The insulation isopleth in V-R coordinate systems can be obtained, the insulation isopleth obtained in I-R coordinate systems can also be calculated.Under State the state of insulation between rule judgment the first hardware 1 and the second hardware 2：When the insulation isopleth C measured is at this When being located in coordinate system above alarm insulation isopleth B, the insulation between the first hardware 1 and the second hardware 2 is judged It is in good condition；When insulating materials by using for a long time, measure insulation isopleth D and be located at alarm insulation isopleth in the coordinate system When below B, above failure insulation isopleth A, judge state of insulation between the first hardware 1 and the second hardware 2 i.e. Will failure.When insulating materials performance degradation, measure insulation isopleth E and be located in the coordinate system below failure insulation isopleth A When, judge that the state of insulation between the first hardware 1 and the second hardware 2 has failed.

Figure 11 shows the histogram of integral and calculating insulation isopleth area under formation.

As a kind of extension of the method directly perceived judged using the isopleth that insulate, it can also be calculated using integration method The area under of failure insulation isopleth, the area under of alarm insulation isopleth, the area under of actual measurement insulation isopleth, by Histogram that the area is converted judges.As shown in figure 11, when the area under S0 of actual measurement insulation isopleth is less than or equal to When the area under S1 of initial insulation isopleth is more than the area under S2 of alarm insulation isopleth, processing unit judges the first gold medal The state of insulation belonged between element and the second hardware is good；When the area under S0 of actual measurement insulation isopleth is less than alarm absolutely The area under S2 of edge isopleth but during the area under S3 more than failure insulation isopleth, judges the first hardware 1 and the State of insulation deterioration between two hardwares 2 will fail and should alarm.When the area under S0 of actual measurement insulation isopleth is small When the area under S3 of failure insulation isopleth, the state of insulation between the first hardware 1 and the second hardware 2 is judged Fail.

All it is slow mostly in addition to the mechanical damage of impact external force due to the change of state of insulation between galvanic couple Process, daily monitoring, it is only necessary to the voltage V at direct measurement galvanic couple two ends, and with being stored in the alarm threshold value voltage of database V_bjIt is compared, if voltage V≤V_bj, then the measurement record of daily magnitude of voltage need to only be carried out.When measurement voltage is close to V_bjOr go out Existing V≤V_bjSituation, just need further to carry out the measurement of insulation isopleth and with alarm isopleth and the isopleth of failing Compare.

Come to insulate to of the present invention obtain based on voltage measurement below in conjunction with Figure of description and specific embodiment Insulation state monitoring apparatus and method are further described in detail between the galvanic couple of isopleth, but the explanation is not constituted pair In the improper restriction of technical solution of the present invention.

Figure 12 illustrate the present embodiment based on voltage measurement obtain insulation isopleth galvanic couple between insulation state monitoring fill The structure put.

As shown in figure 12, between the galvanic couple of the present embodiment state of insulation monitoring device include the second controlled resistor unit 4a, First controlled resistor unit 4b, measuring unit 5, it is used as the monitoring microcomputer 6 of processing unit, display unit 7, warning device 8, power supply Unit 9 and channel selection unit 10, wherein：

Second controlled resistor unit 4a, the first controlled resistor unit 4b and measuring unit 5 are with reference to above-mentioned general principle part Fig. 8 scheme is set, wherein the resistance R of the first controlled resistor unit 4b output measurement resistive modules_X1、R_X2…R_Xi, second is controlled Resistance unit 4a output alarm insulaion resistances R_y1=R_bj, failure insulaion resistance R_y2=R_sx；First controlled resistor unit 4b by after Electrical equipment makes each measurement resistive module be connected to switching respectively between the first hardware 1 and the second hardware 2.Measurement is single First 5 (equivalent to measuring units in Fig. 8) detect the corresponding voltage V in each measurement resistive module two ends_i.Wherein, measuring unit 5 is wrapped Single-chip microcomputer is included, the single-chip microcomputer, which is converted to the current value measured, be transferred to after data signal monitoring microcomputer 6.

Monitoring microcomputer 6 is connected with measuring unit 5, and monitoring microcomputer 6 receives the detection voltage value V that measuring unit 5 is transmitted₁、V₂… V_i, and according to the resistance value R of measurement resistive module corresponding with each magnitude of voltage_X1、R_X2…R_XiObtain actual measurement insulation isopleth, prison Actual measurement insulation isopleth and the failure insulation isopleth prestored and insulation isopleth of alarming are compared micrometer machine 6, and root Judge the state of insulation between the first hardware 1 and the second hardware 2 according to comparison result, wherein：The resistance of insulator 3 is Insulation resistance value R.If being computed setting failure insulaion resistance R in database_sx=750 Ω, alarm insulaion resistance R_bj=2000 Ω, and prestored failure insulation isopleth and alarm insulation isopleth, using following Hes of the first hardware of rule judgment 1 State of insulation between second hardware 2：When the insulation isopleth C measured is located at alarm insulation isopleth in the coordinate system When above B, judge that the state of insulation between the first hardware 1 and the second hardware 2 is good；When insulating materials is by long-term Use, measure insulation isopleth D and be located in the coordinate system below alarm insulation isopleth B, above failure insulation isopleth A When, judge that the deterioration of the state of insulation between the first hardware 1 and the second hardware 2 will fail and should alarm.Work as insulation Material property is deteriorated, and when measuring insulation isopleth E and being located in the coordinate system below failure insulation isopleth A, judges the first gold medal State of insulation between the category hardware 2 of element 1 and second has failed.

In specific implementation step according to aforementioned principles introductory section (1) ask for initially insulating isopleth, (2) ask for it is average Equivalent internal resistanceAveragely couple electric current(3) alarm insulation isopleth and these three steps of failure insulation isopleth are obtained, is led to Cross the second controlled resistor unit 4a output alarm insulaion resistances R_y1=R_bj, failure insulaion resistance R_y2=R_sx, measure and estimate and draw With failure insulaion resistance R_sx=750 Ω it is corresponding failure insulation isopleth A, and with alarm insulaion resistance R_bj=2000 Ω pairs The alarm insulation isopleth B answered.The work of this step can carry out substantial amounts of actual measurement in real ship in advance and go forward side by side line number according to statistics, build up base In database input instrument, at the beginning of then insulating materials installs completion between galvanic couple, measurement is checked and is modified, and obtains figure Failure insulation isopleth A and alarm insulation isopleth B in 7, are stored in instrumentation database as preset data.

Monitoring microcomputer 6 also includes can be used for storage alarm insulation isopleth B and failure insulation isopleth A and each xenogenesis The database of the insulation isopleth historical record data of metal galvanic couple structure.

Display unit 7 is connected with monitoring microcomputer 6, data and signal that the display monitoring microcomputer 6 of display unit 7 is transmitted.The number According to and signal be the intuitively display to the state of insulation between the first hardware 1 and the second hardware 2 and alarm, including Above-mentioned insulation isopleth and the above-mentioned failure insulation isopleth A prestored and alarm insulation isopleth B.The signal includes alarm signal Number, it is defeated when the state of insulation between the first hardware 1 and the second hardware 2 is judged as having failed or will fail Go out the alarm signal.In addition, the display unit 7 can also carry out man-machine interaction.

Warning device 8 is sound and light alarm equipment, and it is connected with monitoring microcomputer 6.

The controlled resistor unit 4a of power subsystem 9 and second, the first controlled resistor unit 4b, measuring unit 5 and monitoring microcomputer 6 Connect respectively, think that it is powered.Power subsystem 9 be configured as by naval vessel multiple power source be converted into the second controlled resistor unit 4a, Multiple power sources needed for first controlled resistor unit 4b, measuring unit 5 and monitoring microcomputer 6.

Channel selection unit 10 selects the dissimilar metal galvanic couple structure for being currently needed for monitoring to access the second controlled resistor unit 4a or the first controlled resistor unit 4b.The channel selection unit 10 takes wire, connector connection access and by relay etc. The measurement end of dissimilar metal galvanic couple structure is connected to the second controlled resistor unit 4a or the first controlled electricity by the mode of switching access Hinder unit 4b.

When insulation state monitoring device works between the galvanic couple that insulation isopleth is obtained based on voltage measurement of the present embodiment, show Show that unit 7 receives user's operational order and sends monitoring microcomputer 6 to, monitoring microcomputer 6 controls the second controlled resistor unit 4a or the One controlled resistor unit 4b is connected to dissimilar metal galvanic couple structure to be measured by channel selection unit 10, and by the survey of different resistances Amount resistive module gradually accesses the corresponding magnitude of voltage of measurement and is uploaded to monitoring microcomputer 6, and monitoring microcomputer 6 is carried out by preset program Data are calculated and the fitting of insulation isopleth, storage, contrast, draw the state of insulation of current dissimilar metal galvanic couple structure, and pass through Display unit 7 carries out data, curve and shown and critical state alarm.The insulation of each dissimilar metal galvanic couple structure of database purchase Isopleth historical record data, can provide foundation for the performance trend analysis of dissimilar metal galvanic couple insulating materials, help relevant Department grasps dissimilar metal galvanic couple insulation protection structure behaviour in service, and reliable foundation is provided for maintenance department.Therefore, on naval vessel Field, the present invention is used in combination with the technique that is electrically insulated between dissimilar metal galvanic couple, can be greatly lowered hull, valve member, the pump housing, Electrochemical corrosion between the dissimilar metals such as pipeline, ring flange, significantly reduces the maintenance cost on naval vessel, improves the safety of maritime applications system Property.

Figure 13 illustrates the monitoring method of state of insulation between galvanic couple of the present invention without using the above-mentioned second controlled electricity Hinder the flow under unit.

As shown in figure 13, between a kind of galvanic couple of the present embodiment state of insulation monitoring method, it is controlled without using second The state of insulation of dissimilar metal galvanic couple structure to be monitored is monitored using above-mentioned monitoring device in the case of resistance unit, The dissimilar metal galvanic couple structure includes the first hardware, the second hardware being connected with the first hardware, and is located at Insulator between first hardware and the second hardware, first hardware and the second hardware are respectively by difference Metal be made；The monitoring method comprises the following steps：

Step 110：The database accumulated by existing same category of device test data, obtains the alarm insulation isopleth prestored And/or the failure insulation isopleth prestored.

Step 120：First controlled resistor unit is connected between the first hardware and the second hardware.

Step 130：Processing unit controls the first controlled resistor unit to export several different resistance R_xi。

Step 140：Measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i。

Step 150：Processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and should Actual measurement insulation isopleth is compared with the alarm insulation isopleth prestored and/or the failure insulation isopleth prestored, and according to Comparison result judges the state of insulation between the first hardware and the second hardware.

As shown in figure 14, between another galvanic couple of the present embodiment state of insulation monitoring method, it uses above-mentioned monitoring to fill Put and the state of insulation of dissimilar metal galvanic couple structure to be monitored is monitored, the dissimilar metal galvanic couple structure includes the first metal Element, the second hardware being connected with the first hardware, and between the first hardware and the second hardware Insulator, first hardware and the second hardware are made up of different metals respectively；The monitoring method includes Following steps：

Step 110：First controlled resistor unit and the second controlled resistor unit are connected to the first hardware and Between two hardwares.

Step 120：Processing unit controls the second controlled resistor unit output insulation alarm resistance value R_bj。

Step 130：Processing unit controls the first controlled resistor unit to export several different resistance R_xi, measuring unit detection Each resistance R_xiCorresponding magnitude of voltage V_i, processing unit is according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain alarm insulation Isopleth.

Step 140：Disconnect the connection of the second controlled resistor unit and the first hardware and the second hardware.

Step 150：Processing unit controls the first controlled resistor unit to export several different resistance R_xi。

Step 160：Measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i。

Step 170：Processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and should Actual measurement insulation isopleth and the alarm isopleth that insulate are compared, and judge the first hardware and the according to comparison result State of insulation between two hardwares.

In some embodiments, the above method also includes step：

Processing unit controls the second controlled resistor unit output failure of insulation resistance value R_sx, processing unit control is first controlled Resistance unit exports several different resistance R_xi, each resistance R of measuring unit detection_xiCorresponding magnitude of voltage V_i, processing unit according to Each resistance R_xiAnd corresponding magnitude of voltage V_iObtain failure insulation isopleth；

Processing unit will be surveyed insulation isopleth and is compared with alarm insulation isopleth and/or failure insulation isopleth, And the state of insulation between the first hardware and the second hardware is judged according to comparison result.

The second controlled resistor unit output insulation alarm resistance value R is controlled in the pretreatment unit of step 110_bj, and by its It is connected with the first hardware and the second hardware, measuring unit measurement insulation alarm resistance value R_bjOn corresponding magnitude of voltage V_bj, the connection of the second controlled resistor unit and the first hardware and the second hardware is then turned off, measuring unit is supervised in real time The magnitude of voltage V surveyed between the first hardware and the second hardware, if magnitude of voltage V reaches p%V_bj, then the step is carried out 110, wherein p% represents a threshold percentage.Wherein, it will determine that magnitude of voltage V reaches p%V_bjAs starting step 110 and thereafter The condition of continuous step.Percentage p% is that those skilled in the art can choose according to actual conditions, such as 90% or 100%.

Insulate between the above-mentioned galvanic couple of correspondence The detailed monitoring method of the monitoring method of state, will not be repeated here.

It should be noted that listed above is only specific embodiment of the invention, it is clear that real the invention is not restricted to more than Example is applied, the similar change for having many therewith.If those skilled in the art directly exported from present disclosure or All deformations associated, all should belong to protection scope of the present invention.

Claims (16)

1. insulation state monitoring device, itself and xenogenesis to be monitored between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement Metal galvanic couple structure is connected, and the dissimilar metal galvanic couple structure includes the first hardware, the be connected with the first hardware Two hardwares, and the insulator between the first hardware and the second hardware, first hardware and Second hardware is made up of different metals respectively；Characterized in that, the monitoring device includes：

Processing unit；

First controlled resistor unit, it is connected with processing unit, and the first controlled resistor unit includes several first resistors And first control circuit, the first control circuit is according to being received from the control signal of processing unit by several first resistors At least one combination be connected as it is multiple have different resistance R_xiMeasurement resistive module, the multiple measurement resistive module is one by one It is connected between the first hardware and the second hardware；

Measuring unit, it is connected with processing unit, the measuring unit detection and each resistance R_xiCorresponding first hardware And the second magnitude of voltage V between hardware_i；

Wherein, the processing unit receives the magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd it is corresponding Magnitude of voltage V_iActual measurement insulation isopleth is obtained, the processing unit insulate actual measurement insulation isopleth and the alarm prestored equivalent Line is compared, and judges the state of insulation between the first hardware and the second hardware according to comparison result.

2. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, the processing unit will also be surveyed failure insulation isopleth of the insulation isopleth with prestoring and is compared.

3. insulation state monitoring device between the galvanic couple as claimed in claim 1 or 2 that insulation isopleth is obtained based on voltage measurement, Characterized in that, also including：

Second controlled resistor unit, it is connected with processing unit, and the second controlled resistor unit includes several second resistances And second control circuit, the second control circuit is according to being received from the control signal of processing unit by several second resistances At least one combination be connected as insulation alarm resistive module and/or failure of insulation resistive module, the insulation alarm resistive mode Block has insulation alarm resistance value R_bj, the failure of insulation resistive module has failure of insulation resistance value R_sx, the insulation alarm Resistive module or failure of insulation resistive module are connected between the first hardware and the second hardware；

When insulation alarm resistive module is connected between the first hardware and the second hardware, the processing unit is received The magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain alarm insulation equivalent Line, the alarm insulate isopleth by as the alarm insulation isopleth prestored；

When failure of insulation resistive module is connected between the first hardware and the second hardware, the processing unit is received The magnitude of voltage V of measuring unit transmission_i, and according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain failure insulation equivalent Line, the failure insulate isopleth by as the failure insulation isopleth prestored.

4. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, the insulation isopleth is characterized as being V-R curves or I-R curves or V-I curves, wherein V characterizes voltage, and R is characterized Resistance, I characterizes electric current.

5. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, the processing unit also includes database, it stores the insulation isopleth data of each dissimilar metal galvanic couple structure.

6. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, also including display unit, it is connected with the processing unit, the number of the display unit display processing unit transmission According to and signal.

7. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, also including warning device, it is connected with the processing unit.

8. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, also including power subsystem, it is connected respectively with the first controlled resistor unit, measuring unit and processing unit, Think that it is powered.

9. insulation state monitoring device between the galvanic couple as claimed in claim 1 that insulation isopleth is obtained based on voltage measurement, its It is characterised by, the measuring unit also includes single-chip microcomputer, the magnitude of voltage measured is converted to and passed after data signal by the single-chip microcomputer It is defeated by processing unit.

10. the monitoring of state of insulation between a kind of monitoring device monitoring galvanic couple using as described in any one in claim 1-9 Method, it is characterised in that including step：

The failure insulation isopleth for obtaining the alarm insulation isopleth prestored and/or prestoring；

First controlled resistor unit is connected between the first hardware and the second hardware；

Processing unit controls the first controlled resistor unit to export several different resistance R_xi；

Measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i；

Processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and actual measurement insulation is equivalent Line is compared with the alarm insulation isopleth prestored and/or the failure insulation isopleth prestored, and is judged according to comparison result State of insulation between first hardware and the second hardware.

11. a kind of monitoring method that state of insulation between galvanic couple is monitored using monitoring device as claimed in claim 3, its feature is existed In, including step：

(1) first controlled resistor unit and the second controlled resistor unit are connected to the first hardware and the second hardware Between；

(2) processing unit controls the second controlled resistor unit output insulation alarm resistance value R_bj；

(3) processing unit controls the first controlled resistor unit to export several different resistance R_xi, each resistance R of measuring unit detection_xi Corresponding magnitude of voltage V_i, processing unit is according to each resistance R_xiAnd corresponding magnitude of voltage V_iObtain alarm insulation isopleth；

(4) connection of the second controlled resistor unit and the first hardware and the second hardware is disconnected；

(5) processing unit controls the first controlled resistor unit to export several different resistance R_xi；

(6) measuring unit detects each resistance R_xiCorresponding magnitude of voltage V_i；

(7) processing unit is based on each resistance R_xiWith corresponding magnitude of voltage V_iActual measurement insulation isopleth is obtained, and the actual measurement is insulated Isopleth is compared with the alarm insulation isopleth, and judges the first hardware and the second metal member according to comparison result State of insulation between part.

12. the monitoring method of state of insulation between monitoring device monitoring galvanic couple as claimed in claim 11, it is characterised in that described Insulation alarm resistance value R_bjBased on alarm Galvanic Current I_bjCalculating is obtained, the alarm Galvanic Current I_bjAccording to alarm rate of corrosion The proportionate relationship of corresponding current density current density corresponding with directly coupling electric current is based on averagely coupling electric currentCalculate Obtain, it is described averagely to couple electric currentVarious calculated based on following：

$r_i=(\frac{\mathrm{\Δ}E}{V_i}-1)\·R_{xi},$

$\stackrel{\‾}{r}=\frac{r_1+r_2+...+r_i}{i},$

$\stackrel{\‾}{I}=\frac{\mathrm{\Δ}E}{\stackrel{\‾}{r}},$

It is above-mentioned it is various in parameter be dissimilar metal galvanic couple structure to be monitored and measured in Seawater, wherein：Δ E is the Voltage between one hardware and the second hardware, R_xiSeveral different resistances, V are exported for the first controlled resistor unit_i Each resistance R is detected for measuring unit_xiCorresponding magnitude of voltage；r_iFor with R_xiCorresponding internal resistance,For average internal resistance.

13. the monitoring method of state of insulation between monitoring device monitoring galvanic couple as claimed in claim 11, it is characterised in that also wrap Include step：

First controlled resistor unit and the second controlled resistor unit be connected to the first hardware and the second hardware it Between；

Processing unit controls the second controlled resistor unit output failure of insulation resistance value R_sx, processing unit the first controlled resistor of control Unit exports several different resistance R_xi, each resistance R of measuring unit detection_xiCorresponding magnitude of voltage V_i, processing unit is according to each resistance Value R_xiAnd corresponding magnitude of voltage V_iObtain failure insulation isopleth；

The processing unit is compared the actual measurement insulation isopleth with alarm insulation isopleth and/or failure insulation isopleth It is right, and the state of insulation between the first hardware and the second hardware is judged according to comparison result.

14. the monitoring method of state of insulation between monitoring device monitoring galvanic couple as claimed in claim 13, it is characterised in that described Failure of insulation resistance value R_sxBased on failure Galvanic Current I_sxCalculating is obtained, the failure Galvanic Current I_sxAccording to failure rate of corrosion The proportionate relationship of corresponding current density current density corresponding with directly coupling electric current is based on averagely coupling electric currentCalculate Obtain, it is described averagely to couple electric currentVarious calculated based on following：

$r_i=(\frac{\mathrm{\Δ}E}{V_i}-1)\·R_{xi},$

$\stackrel{\‾}{r}=\frac{r_1+r_2+...+r_i}{i},$

$\stackrel{\‾}{I}=\frac{\mathrm{\Δ}E}{\stackrel{\‾}{r}},$

It is above-mentioned it is various in parameter be dissimilar metal galvanic couple structure to be monitored and measured under Seawater state, wherein：ΔE For the voltage between the first hardware and the second hardware, R_xiSeveral difference resistances are exported for the first controlled resistor unit Value, V_iEach resistance R is detected for measuring unit_xiCorresponding magnitude of voltage；r_iFor with R_xiCorresponding internal resistance,For average internal resistance.

15. the monitoring method of state of insulation between monitoring device monitoring galvanic couple as claimed in claim 10, it is characterised in that calculate The area that isopleth and the reference axis of being insulated described in coordinate system are surrounded, and with the histogram suitable with the value of the area or light beam figure Characterize the insulation isopleth.

16. the monitoring method of state of insulation between monitoring device monitoring galvanic couple as claimed in claim 11, it is characterised in that in institute The pretreatment unit for stating step (1) controls the second controlled resistor unit output insulation alarm resistance value R_bj, and by itself and the first gold medal Belong to element and the connection of the second hardware, measuring unit measurement insulation alarm resistance value R_bjOn corresponding magnitude of voltage V_bj, then The connection of the second controlled resistor unit and the first hardware and the second hardware is disconnected, measuring unit monitors the first gold medal in real time Belong to the magnitude of voltage V between element and the second hardware, if magnitude of voltage V reaches p%V_bj, then the step (1) is carried out, wherein P% represents a threshold percentage.