CN207301248U - A kind of metal galvanic couple insulation state monitoring system - Google Patents

Abstract

The utility model provides a metal galvanic couple insulation state monitoring system, which monitors several monitoring points, wherein each monitoring point has a heterogeneous metal galvanic structure, wherein: each monitoring point is independently addressed Monitoring point; the metal galvanic insulation state monitoring system includes: at least one addressable junction box, which is connected to each monitoring point; a monitoring device, which is connected to the addressable junction box, and the addressable junction box The monitoring device is connected to the designated monitoring point according to the addressing instruction transmitted by the monitoring device, so that the monitoring device monitors the insulation state of the dissimilar metal galvanic couple structure corresponding to the monitoring point. The utility model can automatically monitor the insulation state of multiple dissimilar metal galvanic couple structures, thereby greatly saving labor costs, effectively improving monitoring efficiency, and realizing centralized analysis and management of monitoring data.

Description

A Metal Galvanic Insulation State Monitoring System

technical field

The utility model relates to a monitoring system for an insulation state, in particular to a monitoring system for an insulation state between electric couples.

Background technique

The electrochemical corrosion caused by the contact of dissimilar metals in the seawater piping system of the ship accelerates the corrosion rate, easily induces stress corrosion, pitting corrosion, and crevice corrosion, and causes corrosion damage to the seawater piping system, resulting in leakage, which is a major threat to the safe operation of the ship. threaten. In addition, the galvanic current between dissimilar metals in the seawater piping system will significantly increase the magnitude of the underwater electric field of the ship and affect the external characteristics of the underwater electric field of the ship.

Insulation materials are used to isolate the fastening joints of dissimilar metal materials in the hull, valves, pipelines and other equipment structures, which can play a dual role in protecting the ship's electric field and reducing electrochemical corrosion between dissimilar metals in seawater piping systems. The status of the galvanic insulation components is monitored. Due to the large number of galvanic couple structures in seawater pipelines and scattered locations, according to the actual situation of the ship's engine room, most of the galvanic insulation components of the seawater pipeline system are installed in the bottom engine room. In particular, seawater pipelines, filters, seawater pumps, and valves connected to various large and medium-caliber sea valves, most of the galvanic insulation components installed at the connection parts are located at the bottom of the engine room, and quite a lot of galvanic insulation components are installed at the bottom of the engine room. It is located in the narrow and harsh environment of the engine room where it is difficult for personnel to enter and work. It takes a lot of personnel and time to monitor the state of galvanic insulation components by manual measurement, and it is difficult to realize the state discrimination of galvanic couples and the systematic arrangement of state data.

Utility model content

The purpose of this utility model is to provide a metal galvanic couple insulation state monitoring system, which can automatically monitor the insulation state of multiple dissimilar metal galvanic couple structures, thereby greatly saving labor costs, effectively improving monitoring efficiency, and realizing centralized analysis of monitoring data and management.

In order to achieve the purpose of the above-mentioned utility model, the utility model provides a metal galvanic insulation state monitoring system, which monitors several monitoring points, wherein each monitoring point has a dissimilar metal galvanic structure, and the dissimilar metal galvanic The pair structure includes a first metal element, a second metal element connected to the first metal element, and an insulator arranged between the first metal element and the second metal element, and the first metal element and the second metal element are respectively composed of of different metals; of which:

Each monitoring point is an independently addressable monitoring point;

The metal galvanic insulation state monitoring system includes:

At least one addressable junction box, which is connected to each monitoring point;

The monitoring device is connected to the addressable junction box, and the addressable junction box connects the monitoring device to the designated monitoring point according to the addressing instruction transmitted by the monitoring device, so that the monitoring device monitors the corresponding monitoring point. Insulation state of dissimilar metal galvanic structures.

In the metal galvanic couple insulation state monitoring system described in the utility model, usually the addressable junction box switches and connects the signals of each monitoring point in time-sharing according to the addressing instruction of the monitoring device and the independent addressing of the monitoring points.

The metal galvanic couple insulation state monitoring system described in the utility model is used in practical applications, for example, in ship equipment. Due to the large number of galvanic couple structures and scattered positions of the seawater pipelines of the ship, according to the actual situation of the engine room equipment, the electric The couple may be a variety of combinations of various metal materials, and the diameters and sizes of the pipes are also different. Due to the differences in the installation process and the service conditions of the seawater piping system, the same kind of couples will also lead to inconsistent states of the couple insulation components. Therefore, for the on-site dissimilar metal galvanic corrosion control monitoring, each monitoring point must be independently addressed, so as to establish the original file data and historical measurement data separately, and realize effective insulation state monitoring and analysis.

A common signal connection of the addressable junction box is: the monitoring signal input cable is connected to a single monitoring point, the power input cable is connected to the power output terminal of the monitoring device, and the power is transmitted; the industrial bus signal input terminal is connected to the monitoring device. The output terminal of the industrial bus signal transmits the communication control signal; the output terminal of the monitoring signal is connected to the signal input terminal of the monitoring device to transmit the signal of the monitoring point.

The addressable junction box usually includes a single-chip microcomputer, and the single-chip circuit selects the corresponding channel to connect according to the addressing instruction of the monitoring device, and the corresponding measurement point signal is usually transmitted to the currently connected monitoring device through a cable. Each addressable signal junction box can usually realize address switching of 16 channel signals.

In summary, the metal galvanic couple insulation state monitoring system described in the present invention is based on circuit implementation, so it can automatically monitor the insulation state of multiple dissimilar metal galvanic couple structures, thereby greatly saving labor costs, effectively improving monitoring efficiency, and realizing monitoring data Centralized analysis and management.

Further, in the metal galvanic insulation state monitoring system described in the present invention, the monitoring device includes at least one monitoring substation, and the monitoring substation is fixedly installed in the monitoring area, and the monitoring substation monitors each monitoring Points correspond to the insulation states of the dissimilar metal galvanic couple structures.

In the above solution, the monitoring substation can usually realize the centralized monitoring of the insulation status of the dissimilar metal galvanic couple structures corresponding to all the monitoring points of the addressable junction box connected to it.

A common signal connection of the monitoring substation is: the power input terminal is connected to the ship power supply device; the monitoring signal input terminal, power output terminal and industrial bus signal output terminal are respectively connected to the addressable junction box monitoring signal output terminal, power input terminal terminal and industrial bus signal input terminal; the Ethernet terminal is connected to one of the network contacts of portable instruments or ship platforms.

Further, in the metal galvanic couple insulation state monitoring system described in the present invention, the monitoring device includes at least one portable mobile monitor, and the portable mobile monitor monitors the insulation state of the dissimilar metal galvanic couple structure corresponding to each monitoring point .

In the above solution, the portable mobile monitor can usually be connected to the signal of a single monitoring point to achieve independent measurement of a single channel, and can also be connected to an addressable junction box to achieve group measurement, and can also be connected to a monitoring substation and the monitoring substation is connected to addressing The integrated junction box realizes regional centralized monitoring, and can also be connected to the ship platform network at the same time as the monitoring substation to realize the centralized monitoring of the entire ship.

Further, in the metal galvanic insulation state monitoring system described in the present invention, the monitoring device includes at least one monitoring substation and at least one portable mobile monitor, wherein the monitoring substation is fixedly arranged in the monitoring area, The monitoring substation is respectively connected to the addressable junction box and the portable mobile monitor, and the monitoring substation monitors the insulation state of the dissimilar metal couple structure corresponding to each monitoring point, and the portable mobile monitor collects and collects The monitoring data of the monitoring substation.

Furthermore, in the above-mentioned metal galvanic insulation state monitoring system, the monitoring substation is remotely connected to the portable mobile monitor through a network.

Further, in the metal galvanic couple insulation state monitoring system described in the present invention, the monitoring device is provided with a display device and/or an alarm device.

In the above solution, the display device can display the insulation state of the dissimilar metal galvanic structure, and the alarm device can give an alarm when the insulation state of the dissimilar metal galvanic structure reaches an alarm threshold.

Further, in any of the above metal galvanic insulation state monitoring systems, the addressable junction box includes:

Cable connectors, which are connected to the dissimilar metal galvanic couple structures at each monitoring point;

Channel switching module, which includes a power supply circuit, a single-chip microcomputer circuit, an addressing command interface circuit, an insulation signal interface circuit and a drive circuit, wherein the power supply circuit supplies power to the addressable junction box, and the addressing command transmitted by the monitoring device is received by the addressing command interface circuit After receiving, it is decoded by the single-chip circuit and output to the driving circuit for amplification, and the driving circuit drives the insulating signal interface circuit to operate, so that the monitoring device is connected to the designated monitoring point, so that the monitoring device monitors the dissimilar metal couple corresponding to the monitoring point The insulating state of the structure.

Furthermore, in the above-mentioned metal galvanic insulation state monitoring system, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module to monitor the dissimilar metal galvanic couple structure voltage value based on the dissimilar metal galvanic couple structure The insulating state of the structure.

The specific content and implementation of the above scheme can refer to the publication number CN106940417A, the publication date is July 11, 2017, and the title is "a device and method for monitoring the insulation state between galvanic couples based on voltage measurement to obtain insulation equivalence lines". The Chinese patent documents are not repeated here.

Further, in the above-mentioned metal galvanic couple insulation state monitoring system, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module to monitor the dissimilar metal electrical couple structure based on the AC impedance value of the dissimilar metal couple structure. The insulating state of the pair structure.

For the specific content and implementation of the above-mentioned scheme, please refer to the Chinese patent document whose publication number is CN106645966A, and the publication date is May 10, 2017, and the name is "a monitoring device and method for the insulation state between galvanic couples", which is no longer here repeat.

Furthermore, in the above-mentioned metal galvanic couple insulation state monitoring system, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module, so as to monitor the dissimilar metal electrical The insulating state of the pair structure.

In the above scheme, the dissimilar metal galvanic couple structure, such as the galvanic couple formed in the seawater medium, can be equivalent to the cathode and anode of the primary battery, so the voltage V between the two poles can be measured, and the energy released during the measurement can be calculated as A release energy value E based on which the insulation state of the dissimilar metal galvanic couple structure is monitored.

The metal galvanic couple insulation state monitoring system described in the utility model has the following advantages and beneficial effects:

1) It can automatically monitor the insulation status of multiple dissimilar metal galvanic couple structures, thereby greatly saving labor costs, effectively improving monitoring efficiency, and realizing centralized analysis and management of monitoring data.

2) Since the portable mobile monitor can move freely, and the monitoring substation is fixedly set in the monitoring area, it is a monitoring mode compatible with mobile and fixed.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a metal galvanic couple insulation state monitoring system according to the present invention.

Fig. 2 is a structural schematic diagram of a dissimilar metal galvanic couple structure.

Fig. 3 is a structural schematic diagram of an addressable junction box in an embodiment of the metal couple insulation state monitoring system described in the present invention.

Fig. 4 is a structural schematic diagram of a monitoring substation of the metal galvanic insulation state monitoring system described in the present invention in one embodiment.

Fig. 5 is a structural schematic diagram of a portable mobile monitor in an embodiment of the metal galvanic insulation state monitoring system described in the present invention.

Fig. 6 is a schematic diagram of the histogram explaining energy lines.

Detailed ways

The metal couple insulation state monitoring system described in the utility model will be further described in detail below in combination with the accompanying drawings and specific embodiments, but the description does not constitute an improper limitation to the technical solution of the utility model.

Fig. 1 shows the structure of the metal couple insulation state monitoring system described in the present invention in an embodiment. Fig. 2 shows a structure diagram of a dissimilar metal galvanic couple structure.

As shown in Figure 1, the metal galvanic couple insulation state monitoring system of this embodiment monitors several monitoring points, wherein each monitoring point has a dissimilar metal galvanic structure 401, and the dissimilar metal galvanic structure 401 is shown in Figure 2 , including a first metal element 1, a second metal element 2 connected to the first metal element 1, and an insulator 3 disposed between the first metal element 1 and the second metal element 2, the first metal element 1 and the second metal element The metal elements 2 are respectively made of different metals; wherein:

Each monitoring point is an independently addressable monitoring point;

The metal couple insulation condition monitoring system includes:

Several addressable junction boxes 10, which are connected to each monitoring point;

A monitoring device including a monitoring substation 20 and a portable mobile monitoring instrument 30 fixedly arranged in the monitoring area is connected with the addressable junction box 10 . The addressable junction box 10 connects the monitoring device to a designated monitoring point according to the addressing instruction transmitted by the monitoring device, so that the monitoring device monitors the insulation state of the dissimilar metal galvanic couple structure 401 corresponding to the monitoring point.

In some embodiments, the monitoring device is provided with a display device and/or an alarm device.

In some embodiments, an addressable junction box includes:

Cable connectors, which are connected to the dissimilar metal galvanic couple structures at each monitoring point;

Channel switching module, which includes a power supply circuit, a single-chip microcomputer circuit, an addressing command interface circuit, an insulation signal interface circuit and a drive circuit, wherein the power supply circuit supplies power to the addressable junction box, and the addressing command transmitted by the monitoring device is received by the addressing command interface circuit After receiving, it is decoded by the single-chip circuit and output to the driving circuit for amplification, and the driving circuit drives the insulating signal interface circuit to operate, so that the monitoring device is connected to the designated monitoring point, so that the monitoring device monitors the dissimilar metal couple corresponding to the monitoring point The insulating state of the structure.

In this embodiment, the monitoring substation 20 and the portable mobile monitor 30 coexist, and the monitoring substation 20 is connected to the portable mobile monitor 30 . The metal galvanic insulation state monitoring system includes several addressable junction boxes 10, several monitoring substations 20, portable mobile monitors 30, and ship equipment 40, which may include dissimilar metal galvanic couple structures of seawater piping systems 401, ship platform network 402 and power supply equipment 403, wherein the cable at the monitoring signal input end of the addressable junction box 10 is connected to the heterogeneous metal galvanic structure 401, and the cable at the power input end is connected to the power output end of the monitoring substation 20, and The industrial bus signal input end is connected to the industrial bus signal output end of the monitoring substation 20, and the addressable junction box 10 realizes the centralized and independent switching of the signals of the regionally dispersed metal galvanic insulation components 401 according to the command signal of the monitoring substation 20, and the monitoring signal The output end is connected to the signal input end of the monitoring substation 20, so as to realize sending the current signal of the metal galvanic couple insulation assembly 401 to the monitoring substation 20 for measurement.

It should be noted that, in other embodiments, the monitoring substation 20 and the portable mobile monitoring instrument 30 may also exist independently. When the portable mobile monitor 30 exists alone, it replaces the monitoring substation 20 in the above embodiment.

The power input terminal of the monitoring substation 20 is connected to the ship power supply equipment 403, which provides the voltage of the dissimilar metal corrosion monitoring device, and the Ethernet terminal is connected to the portable mobile monitor 30 and the ship platform network 402 to realize measurement data transmission To the portable mobile monitor 30 and the ship platform network 402. The portable mobile monitor 30 realizes the collection, analysis and archiving of measurement data.

Fig. 3 shows the structure of an addressable junction box in an embodiment of the metal galvanic insulation state monitoring system described in the present invention.

As shown in Figure 3, in this embodiment, the addressable junction box 10 includes a channel switching module 101 and a cable connector 102, wherein the channel switching module 101 includes a DC/DC circuit 1011 as a power supply circuit, a single-chip microcomputer circuit 1013, as an addressing The industrial bus communication interface circuit 1012 of the address command interface circuit, the signal input and output interface circuit 1015 and the drive circuit 1014 as the insulating signal interface circuit mainly realize the signal concentration of the dispersed metal couple insulation assembly 401 and the mutual switching between the measuring points. All module components are collectively installed in the chassis.

The DC/DC circuit 1011 and the industrial bus communication interface circuit 1012 of the channel switching module 101 are connected to the industrial bus communication interface of the monitoring substation 20 and the portable mobile monitor 30, and receive the control command for signal switching, and the DC/DC circuit 1011 is for channel switching Each functional circuit inside the module 101 provides the required working voltage. The signal input and output interface circuit 1015 is connected to the dispersed metal galvanic couple insulation assembly 401 through the cable connector 102, and collects the scattered measurement signals and outputs them independently in time. The single-chip microcomputer circuit 1013 is connected with the industrial bus communication interface circuit 1012 and the driving circuit 1014 to realize the decoding and output of control commands, and the driving circuit 1014 is connected with the signal input and output interface circuit 1015 to amplify the decoding output signal of the control module and drive the input and output of the signal The interface circuit 1015 operates to realize mutual switching output of measurement signals.

Fig. 4 shows the structure of an addressable junction box in an embodiment of the metal galvanic insulation state monitoring system described in the present invention.

As shown in Figure 4, in this embodiment, the monitoring substation 20 includes a power supply module 201, a communication module 202, a DC signal measurement module 203, an AC signal measurement module 204, a program-controlled current source module 205, a controlled resistance network module 206, a channel The switching module 207, the control processing module (for example, an embedded microcomputer) 208, the cable connector 209, and the like are collectively installed in the wall-mounted case of the engine room. The power supply module 201 is connected to all modules in the monitoring substation 20 to provide DC24V power supply voltage, the communication module 202 and the control processing module 208, the DC signal measurement module 203, the AC signal measurement module 204, the program-controlled current source module 205, and the controlled resistance network module 206. The channel switching module 207 is connected to transmit control commands and data information. The program-controlled current source module 205 is connected to the channel switching module 207 and the AC signal measurement module 204 to provide a program-controlled AC signal source. The controlled resistance network module 206 is connected to the channel switching module 207 to provide a resistance signal corresponding to the resistance value. The channel switch module 207 is connected with the DC signal measurement module 203 and the AC signal measurement module 204 to transmit the potential signal of the galvanic couple structure.

The power supply module 201 is connected with the power supply equipment of the ship and each module in the monitoring substation 20 , and converts the AC220V power supplied by the ship into DC24V power supply to each module in the monitoring substation 20 .

The circuit of the communication module 202 includes a DC/DC circuit 2021 , a serial communication interface circuit 2022 , a single-chip microcomputer circuit 2023 , and an industrial bus communication interface circuit 2024 . The DC/DC circuit 2021 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the communication module receives the control signal from the control processing module 208 through the serial communication interface, and the single-chip circuit decodes the coded signal and outputs it to other modules and It is connected to the addressable junction box through the industrial bus communication interface circuit to control the corresponding modules for data processing.

The DC signal measurement module 203 circuit includes a DC/DC circuit 2031 , a mode selection circuit 2032 , a DC potential signal measurement circuit 2033 , an insulation state histogram measurement circuit 2034 , a single-chip microcomputer circuit 2035 , and a serial communication interface circuit 2036 . The DC/DC circuit 2031 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the single-chip microcomputer circuit 2035 and the mode selection circuit 2032, the DC potential signal measurement circuit 2033, the insulation state histogram measurement circuit 2034, and the serial communication interface circuit 2036 connected to receive the control command sent by the serial communication interface circuit 2036, the control mode selection circuit 2032 connects the DC potential signal measurement circuit 2033 or the insulation state histogram measurement circuit 2034, and the measurement data is transmitted by the serial communication interface circuit 2036 The communication module 202 sends it to the control processing module 208 for processing. DC potential signal measurement circuit 2033: the input potential signal of the galvanic couple structure is amplified and filtered, then sent to the measurement chip for A/D conversion and then sent to the single-chip microcomputer circuit 2035. Insulation state histogram measurement circuit 2033: A series of set resistance signals are generated by the controlled resistance network module 206 and applied to both ends of the galvanic couple structure under test. At this time, the DC voltage signal at both ends of the resistance is sent to the measurement chip After performing A/D conversion, it is sent to the single-chip microcomputer circuit 2035.

The AC signal measurement module 204 includes a DC/DC circuit 2041 , a mode selection circuit 2042 , an AC voltage measurement circuit 2043 , an AC current measurement circuit 2044 , a single-chip microcomputer circuit 2045 , and a serial communication interface circuit 2046 . The DC/DC circuit 2041 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the single-chip circuit 2045 is connected with the mode selection circuit 2042, the AC voltage measurement circuit 2043, and the AC current measurement circuit 2044, and receives the serial communication interface circuit 2046 The transmitted control command, the control mode selection circuit 2042 connects the AC voltage measurement circuit 2043 and the AC current measurement circuit 2044, and transmits the measurement data from the communication module 202 to the control processing module 208 through the serial communication interface circuit 2046 for processing.

The circuit of the program-controlled current source module 205 includes a DC/DC circuit 2051 , a serial communication interface circuit 2052 , a single-chip microcomputer circuit 2053 , a DDS (Direct Digital Synthesis) circuit 2054 , and a power amplifier circuit 2055 . The DC/DC circuit 2051 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module. The single-chip microcomputer circuit 2053 is connected with the serial communication interface circuit 2052 and the DDS circuit 2054, and receives the control command transmitted by the serial communication interface circuit 2052. The circuit 2054 generates an adjustable AC signal with a frequency of 200Hz-8KHz, and the AC signal passes through the power amplifier circuit 2055 to form an AC signal source with an AC voltage of 10V (error ±1.5%) and a current of 5-100mA.

The circuit of the controlled resistance network module 206 includes a DC/DC circuit 2061 , a serial communication interface circuit 2062 , a single-chip microcomputer circuit 2063 , a driving circuit 2064 and a resistance network circuit 2065 . The DC/DC circuit 2061 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module. The single-chip circuit 2063 is connected with the serial communication interface circuit 2062 and the drive circuit 2064, receives the control command transmitted by the serial communication interface circuit 2062, and controls The drive circuit 2064 connects the corresponding resistor network circuit 2065 to output a resistor signal corresponding to the resistor value.

The control processing module 208 selects an industrial embedded industrial computer, connects with the communication module 202, transmits control commands and receives data information according to software settings, and processes, analyzes and records the data information. It is connected to the portable instrument and the network node of the ship platform through the Ethernet interface, and transmits various data information of the current monitoring substation 20.

Fig. 5 shows the structure of a portable mobile monitor in an embodiment of the metal galvanic insulation state monitoring system of the present invention.

As shown in Figure 5, in this embodiment, the portable mobile monitor 30 includes a battery power supply module 301, a communication module 302, a DC signal measurement module 303, an AC signal measurement module 304, a program-controlled current source module 305, and a controlled resistance network module 306 , a control processing module (for example, an industrial integrated microcomputer) 307, a cable connector 308, etc., each module component is collectively installed in a portable case. The battery power supply module 301 is connected with all modules in the portable mobile monitor 30 to provide DC24V power supply voltage, the communication module 302 and the control processing module 307, the DC signal measurement module 303, the AC signal measurement module 304, the program-controlled current source module 305, the controlled resistance The network module 306 is connected to transmit control commands and data information. The program-controlled current source module 305 is connected to the AC signal measurement module 304 to provide a program-controlled AC signal source. The controlled resistance network module 306 is connected to the DC signal measurement module 303 to provide a resistance signal corresponding to the resistance value.

The battery power supply module 301 includes an external charger 3011, a lithium battery 3012 and a battery information display circuit 3013. The external charger 3011 is connected to the lithium battery 3012 to charge it. The lithium battery 3012 has a nominal voltage of 22.2VDC, a full charge voltage of 24.2VDC, and a nominal capacity of 200Wh. After fully charged, it can supply the monitoring device portable instrument for 4 hours. The battery information display circuit 3013 is connected to the lithium battery 3012 to display the current voltage and capacity information of the lithium battery.

The communication module 302 includes a DC/DC circuit 3021 , a serial communication interface circuit 3022 , a single-chip microcomputer circuit 3023 , and an industrial bus communication interface circuit 3024 . The DC/DC circuit 3021 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the communication module 302 receives the control signal sent by the control processing module 307 through the serial communication interface circuit 3022, and the single-chip circuit 3023 decodes the coded signal and Output other modules and connect to the addressable junction box through the industrial bus communication interface circuit 3024 to control the corresponding modules for data processing.

The DC signal measurement module 303 circuit includes a DC/DC circuit 3031 , a mode selection circuit 3032 , a DC potential signal measurement circuit 3033 , an insulation state histogram measurement circuit 3034 , a single-chip microcomputer circuit 3035 , and a serial communication interface circuit 3036 . The DC/DC circuit 3031 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the single-chip microcomputer circuit 3035 and the mode selection circuit 3032, the DC potential signal measurement circuit 3033, the insulation state histogram measurement circuit 3034, the single-chip microcomputer circuit 3035, the serial Connect to the line communication interface circuit 3036, receive the control command transmitted by the serial communication interface circuit, the control mode selection circuit 3032 connects the DC potential signal measurement circuit 3033 or the insulation state histogram measurement circuit 3034, and transmits the measurement data through the serial communication interface The circuit 3036 is sent by the communication module 302 to the control processing module 307 for processing. DC potential signal measurement circuit 3033: the input galvanic couple structure potential signal is amplified and filtered, then sent to the measurement chip for A/D conversion and then sent to the single-chip microcomputer circuit 3035. Insulation state histogram measurement circuit 3033: A series of set resistance signals are generated by the controlled resistance network module 306 and applied to both ends of the galvanic insulation component structure under test. At this time, the DC voltage signal at both ends of the resistance is sent to the The measuring chip is sent to the single-chip circuit 3035 after A/D conversion.

The AC signal measurement module 304 includes a DC/DC circuit 3041 , a mode selection circuit 3042 , an AC voltage measurement circuit 3043 , an AC current measurement circuit 3044 , a single-chip microcomputer circuit 3045 , and a serial communication interface circuit 3046 . The DC/DC circuit 3041 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module, the single-chip circuit 3045 is connected with the mode selection circuit 3042, the AC voltage measurement circuit 3043, and the AC current measurement circuit 3044, and receives the serial communication interface circuit 3046 The transmitted control command, the control mode selection circuit 3042 connects the AC voltage measurement circuit 3043 and the AC current measurement circuit 3044, and transmits the measurement data from the communication module 302 to the control processing module 307 via the serial communication interface circuit 3046 for processing.

The programmable current source module 305 includes a DC/DC circuit 3051 , a serial communication interface circuit 3052 , a single chip circuit 3053 , a DDS circuit 3054 , and a power amplifier circuit 3055 . The DC/DC circuit 3051 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module. The single-chip microcomputer circuit 3053 is connected with the serial communication interface circuit 3052 and the DDS circuit 3054, and receives the control command transmitted by the serial communication interface circuit 3052. The circuit 3054 generates an adjustable AC signal with a frequency of 200Hz-8KHz, and the AC signal passes through the power amplifier circuit 3055 to form an AC signal source with an AC voltage of 10V (error ±1.5%) and a current of 5-100mA.

The circuit of the controlled resistor network module 306 includes a DC/DC circuit 3061 , a serial communication interface circuit 3062 , a single chip circuit 3063 , a drive circuit 3064 and a resistor network circuit 3065 . The DC/DC circuit 3061 converts the DC24V voltage into the voltage required by the internal circuit of the module to supply the corresponding module. The single-chip microcomputer circuit 3063 is connected with the serial communication interface circuit 3062 and the driving circuit 3064, receives the control command transmitted by the serial communication interface circuit 3062, and controls the The driving circuit 3064 connects the corresponding resistor network circuit 3065, and outputs a resistor signal corresponding to the resistor value.

The control processing module 307 selects a fanless industrial tablet computer, connects with the communication module 302, transmits control commands and receives data information according to software settings, and processes, analyzes and records the data information. Connect to the monitoring sub-station 20 through the Ethernet interface, receive various data information of each monitoring sub-station 20, and collect the data information of all monitoring points in each monitoring sub-station, and display and alarm.

It should be noted that, in other implementation manners, it may also be connected to the monitoring substation 20 and the ship platform network point through an Ethernet interface, or only connected to the ship platform network point.

In some embodiments, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module to monitor the insulation state of the dissimilar metal galvanic structure based on the voltage value of the dissimilar metal galvanic structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Refer to the Chinese patent document with the publication number CN106940417A, published on July 11, 2017, and titled "A Device and Method for Monitoring the Insulation State between Galvanic Couples Based on Voltage Measurement to Obtain Insulation Contours".

In some embodiments, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module to monitor the insulation state of the dissimilar metal galvanic structure based on the AC impedance value of the dissimilar metal galvanic structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference is made to the Chinese patent document with publication number CN106645966A, published on May 10, 2017, and titled "A device and method for monitoring the insulation state between galvanic couples".

In some embodiments, the monitoring substation and/or the portable mobile monitor respectively include a measurement module and a processing module to monitor the insulation state of the dissimilar metal galvanic structure based on the released energy value of the dissimilar metal galvanic structure. The specific implementation method can be first based on the voltage value of the dissimilar metal galvanic couple structure in the above-mentioned embodiment to calculate the released energy value E of the dissimilar metal galvanic couple structure according to physical principles, and then monitor the dissimilar metal galvanic couple structure based on the released energy value E insulation state.

Combining the above three solutions, the monitoring functions realized may include:

Daily voltage monitoring: by directly measuring the potential of the dissimilar metal galvanic structure 401, display and record the current galvanic potential difference. Due to the change of the insulation state between the couples, except for the mechanical damage caused by sudden external force, most of them are slow processes. For daily monitoring, it is only necessary to measure and record the measured voltage Vsc at both ends of the couples, and compare them with those stored in the database. The alarm threshold voltage V _bj and the failure voltage V _sx are compared. When the measured voltage V _sc enters the potential threshold region of V _bj >V _sc >V _sx , the system will give an alarm prompt, and conduct further performance tests on the dissimilar metal galvanic couple structure 401 .

AC impedance test: by applying AC signals to both ends of the dissimilar metal couple structure 401 at the monitored point to measure, calculate, display, and record the current AC impedance of the dissimilar metal couple structure 401; according to the actual existence of the dissimilar metal couple structure 401 The state realizes the dry state impedance test and the wet state impedance test respectively, the dry state impedance test is used to judge the correctness of the insulation material installation process, and the wet state insulation test is used to assist in judging the insulation state of the galvanic couple.

Histogram energy line test: By applying a series of resistors with different resistance values to both ends of the dissimilar metal galvanic couple structure 401 at the monitored point, measure the voltage across the resistors and calculate and generate a histogram energy line marked in energy units. As shown in Figure 6, after measuring the initial state of equipment with specific specifications (such as seawater pipelines, valves), the initial energy release line E ₀ of the initial state, the alarm energy release line E _bj and the failure energy release line as criteria are obtained E _sx , simultaneously obtain the initial voltage V ₀ corresponding to E ₀ , the alarm voltage V _bj corresponding to E _bj , and the failure voltage V _sx corresponding to E _sx , and store them in the database without changing them. The measured energy release line E _sc is calculated according to the actual state measurement of the current galvanic couple, and is used for comparison with the alarm release energy line E _bj and the failure energy release line E _sx in monitoring to determine the insulation state of the dissimilar metal galvanic couple structure 401 . When the measured energy release line E _sc enters the E _bj >E _sc >E _sx area in the insulation performance monitoring histogram, the system will display and alarm on the corresponding channel.

It should be noted that the prior art part in the scope of protection of the present utility model is not limited to the embodiments given in the application documents, all prior art not contradicting the scheme of the present utility model, including but not limited to Prior patent documents, prior publications, prior public use, etc., can all be included in the protection scope of the present utility model.

In addition, it should be noted that the combination of the technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific examples, all the technical features recorded in this case can be used in any way Free combination or combination, unless contradictory to each other.

It should be noted that the above examples are only specific embodiments of the present utility model, and obviously the present utility model is not limited to the above embodiments, and there are many similar changes thereupon. If those skilled in the art directly derive or associate all deformations from the content disclosed in the utility model, they shall all belong to the protection scope of the utility model.

Claims (10)

1. a kind of metal galvanic couple insulation state monitoring system, it is monitored several monitoring points, each of which monitoring point Dissimilar metal galvanic couple structure is respectively provided with, the dissimilar metal galvanic couple structure includes the first hardware, connects with the first hardware The second hardware connect, and the insulator between the first hardware and the second hardware, first metal Element and the second hardware are made of different metals respectively；It is characterized in that：

Each monitoring point is the monitoring point independently addressed；

The metal galvanic couple insulation state monitoring system includes：

At least one addressable junction box, it is connected with each monitoring point；

Monitoring device, it is connected with the addressable junction box, the addressing that the addressable junction box is transmitted according to monitoring device Monitoring device is connected by instruction with appointed monitoring point, so that monitoring device monitors the corresponding dissimilar metal galvanic couple in the monitoring point The state of insulation of structure.

2. metal galvanic couple insulation state monitoring system as claimed in claim 1, it is characterised in that the monitoring device is included extremely A few Monitor Sub-Station of Less, the Monitor Sub-Station of Less are fixedly installed in monitoring region, and the Monitor Sub-Station of Less monitors each monitoring point pair The state of insulation for the dissimilar metal galvanic couple structure answered.

3. metal galvanic couple insulation state monitoring system as claimed in claim 1, it is characterised in that the monitoring device is included extremely A few Portable movable monitor, the Portable movable monitor monitor the corresponding dissimilar metal galvanic couple structure in each monitoring point State of insulation.

4. metal galvanic couple insulation state monitoring system as claimed in claim 1, it is characterised in that the monitoring device is included extremely A few Monitor Sub-Station of Less and at least one Portable movable monitor, wherein the Monitor Sub-Station of Less is fixedly installed on monitoring region Interior, the Monitor Sub-Station of Less is connected respectively with the addressable junction box and Portable movable monitor, the Monitor Sub-Station of Less monitoring The state of insulation of the corresponding dissimilar metal galvanic couple structure in each monitoring point, the Portable movable monitor collection and collects monitoring point The monitoring data stood.

5. metal galvanic couple insulation state monitoring system as claimed in claim 4, it is characterised in that the Monitor Sub-Station of Less with it is portable Formula mobile monitoring instrument is connected by network remote.

6. metal galvanic couple insulation state monitoring system as claimed in claim 1, it is characterised in that the monitoring device is equipped with Display device and/or warning device.

7. the metal galvanic couple insulation state monitoring system as described in any one in claim 1-6, it is characterised in that described to seek Location formula junction box includes：

Cable-to-cable connector, it is connected with the dissimilar metal galvanic couple structure of each monitoring point；

Channel switching module, it includes power circuit, single chip circuit, addressing instruction interface circuit, insulating signal interface circuit And drive circuit, wherein power circuit are powered for addressable junction box, the addressing instruction of monitoring device transmission is addressed instruction and connects After mouth circuit receives, it is amplified through single chip circuit decoding output to drive circuit, drive circuit driving insulating signal interface Circuit operation, so that monitoring device is connected with appointed monitoring point, so that monitoring device monitors the corresponding xenogenesis in the monitoring point The state of insulation of metal galvanic couple structure.

8. the metal galvanic couple insulation state monitoring system as described in any one in claim 2-5, it is characterised in that the prison Survey substation and/or Portable movable monitor includes measurement module and processing module respectively, with based on dissimilar metal galvanic couple structure Magnitude of voltage, monitor dissimilar metal galvanic couple structure state of insulation.

9. the metal galvanic couple insulation state monitoring system as described in any one in claim 2-5, it is characterised in that the prison Survey substation and/or Portable movable monitor includes measurement module and processing module respectively, with based on dissimilar metal galvanic couple structure AC impedance, monitor dissimilar metal galvanic couple structure state of insulation.

10. the metal galvanic couple insulation state monitoring system as described in any one in claim 2-5, it is characterised in that described Monitor Sub-Station of Less and/or Portable movable monitor include measurement module and processing module respectively, with based on dissimilar metal galvanic couple knot The value that releases energy of structure, monitors the state of insulation of dissimilar metal galvanic couple structure.