CN209590123U - Metro Stray Current Monitoring device - Google Patents
Metro Stray Current Monitoring device Download PDFInfo
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- CN209590123U CN209590123U CN201920268803.3U CN201920268803U CN209590123U CN 209590123 U CN209590123 U CN 209590123U CN 201920268803 U CN201920268803 U CN 201920268803U CN 209590123 U CN209590123 U CN 209590123U
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Abstract
Metro Stray Current Monitoring device is related to Metro Stray Current Monitoring technology neck field, is to realize the monitoring to metro stray current.The utility model can be realized to Metro Stray Current Monitoring, monitoring of stray current device is communicated by RS485 and using standard agreement and external stray electrical current intelligence sensor, the data of now multiple intelligence sensors can be acquired, networking flexibility, wiring are simple, convenient to measure to difference.
Description
Technical field
The present apparatus belongs to Metro Stray Current Monitoring technology neck field.
Background technique
Currently, urban rail transit in China is quickly grown, operation range constantly expands, and operating mileage is continuously increased, more next
The traffic pressure of people's daily trip has been shared more.Wherein subway (or light rail) is big with its transport capacity, and travel speed is fast
Rapidly developed with the advantages that taking safety and comfort in the whole world.Possess in more than 100 big or middle city in the world at present
The subway and light railways of nearly 6000Km, will have 20 city plans to build 20 or more within several years in China's future
Subway and city rail traffic route, total kilometrage are up to more than 800 kilometers.City rail (subway and light rail) has become various countries
Economic development and the important component for improving life of urban resident.
The mode of traction of countries in the world subway and light rail uses electric propulsion, and electric propulsion has that traction power is big, the energy is sharp
It is high, good in economic efficiency with rate, the advantages that free from environmental pollution and weatherproof.Electric propulsion mostly uses direct current to supply greatly at present
Electricity, DC voltage level are respectively 600V, 750V, 1500V and 3000V.Direct current 600V standard is more common in two prewar English, beauty etc.
Some City Rail Transit Systems that country builds, various countries' City Rail Transit System that the later period builds up mostly use greatly direct current 750V
Or direct current 1500V standard.Such as Beijing early stage metro traction uses 750V DC power-supply system, a plurality of route of Shanghai Underground is adopted
With 1500V direct current supply.Traction current needed for train is provided by traction substation, by contact net to train power transmission, then
Traction current returns to traction substation by train rail.Then, traction substation anode, contact net, train, rail and
Traction substation cathode, this five part form the entire circuit of traction current.Since rail is difficult to accomplish over the ground completely absolutely
Edge, so traction current and traction substation is non-fully flowed back to by rail, but some electric current is spuious by rail
The earth is flowed into, finally by greatly flowing back to traction substation.These flow into the part traction current of the earth due to its " mixed and disorderly nothing
The property of sequence " and be known as stray electrical current (also cry fan flow) by us.What stray electrical current itself feared well without, stray electrical
Stream is final or can flow back to rail and return to traction substation, but stray electrical current can cause electrochemical metal to corrode, this is
It is the very corn of a subject.
The harm of stray electrical current:
1, stray current corrosion causes destroying concrete structure:
Concrete itself is not had an impact when stray electrical current passes through concrete, but is entered in stray electrical current by concrete
When in place of reinforcing bar, cathode is presented in reinforcing bar.Due to cathode hydrogen evolution effect will inside concrete formed local pressure, make reinforcing bar with
Concrete generates removing.If there is the compound of sodium or potassium exists, then electric current by can in the interface of reinforcing bar and concrete
Soluble subsilicate or aluminate are generated, the bond strength of reinforcing bar and concrete is significantly reduced.Reinforcing bar is left in electric current
The position of concrete is returned to, reinforcing bar is in anode and electrochemical corrosion occurs, and it is (red to form erosion Fe (0H) 2, Fe2O2.2xH2O
Embroider), Fe3O4 (scales) etc..Erosion can squeeze concrete in a manner of mechanism in anode accumulation and be allowed to crack.It is in-orbit
After pipeline transportation system puts into effect, the concrete structure destroyed by stray current corrosion is repaired and be replaced will
It is very difficult.
2, stray current corrosion rail and its attachment:
Stray electrical current can generate serious corrosion to Rail Transit System tunnel knot component and underground installation.Especially arranging
Vehicle lower part since train is in anode region is easy to that galvanic corrosion occurs.
3, stray current corrosion buried pipeline:
In Rail Transit System or buried pipeline along the line mainly has tap water pipeline, gas-pipe line, power supply pipeline, heating
Pipeline, oil pipeline etc..There is stray current corrosion in what these pipelines were all different degrees of according to investigations, some pipelines even exist
Spot corrosion occurs in the very short time, the coal gas main pipeline leakage in Shenzhen is exactly as caused by stray electrical current.
4, stray electrical current causes personal electric shock:
Rail Transit System track be long rail, be formed by more piece track welding, therefore track seam resistance value is larger, and
Increase the potential difference between track and structural member, if track seam crossing snaps, track seam resistance will be bigger, this makes rail
Potential difference between road and structural member is higher.On platform, when the potential difference between the compartment and platform of subway (or light rail) very
Gao Shi, people just have the danger of electric shock when getting on the bus.German Standard VDE0115 regulation: this current potential must not exceed 92V.
5, stray electrical current burns drainage equipment:
There is insulation to be separated by between track and sleeper, if for some reason, insulant damage, track and drainage net are short
At this moment road will have very big stray electrical current, by drainage net, current drainage cabinet, flow back to traction substation, due to the core in current drainage cabinet
The capacity of heart element drainage diode is limited (general through-current capability is no more than 200A), therefore excessive stray electrical current may be burnt
Current drainage cabinet, Guangzhou Underground once had such accident.
6, stray electrical current interference communication:
The important component that the electricity that pantograph (boots) generates is burst with surge for city clutter, to neighbouring communication equipment
It is interfered with precision instrument, the transmitting antenna of higher hamonic wave in contact wire or vehicle, the radiation pollution electricity of short distance
Radio interference field at magnetic environment, VOV and CISPR (international wireless electrical interference special commission) the contact wire 10m that all adjusts the distance to
Limit value is gone out, this point is for the various electric cars especially significant in urban district.
Summary of the invention
The utility model is in order to realize to Metro Stray Current Monitoring, to provide a kind of Metro Stray Current Monitoring dress
It sets.
Metro Stray Current Monitoring device, it includes S3C6410 processor 10, stray electrical current intelligence sensor 11, ether
Network interface 12, RS485 bus 13, RS232 interface 14, power circuit 15, RAM16 and FLASH17；
The stray electrical current intelligence sensor 11 is for acquiring metro stray current；The stray electrical current intelligence sensor 11
Signal output end connect by the stray electrical current acquisition signal input part of RS485 bus 13 and S3C6410 processor 10；
The data terminal of the Ethernet interface 12 is connect with the Ethernet data end of S3C6410 processor 10；
The RS232 data terminal of the RS232 interface 14 is connect with the RS232 data terminal of S3C6410 processor 10；
The power end of the power circuit 15 is connect with the power end of S3C6410 processor 10；
The end RAM of the RAM16 is connect with the end RAM of S3C6410 processor 10；
The end FLASH of the FLASH17 is connect with the end FLASH of S3C6410 processor 10.
The utility model is realized to Metro Stray Current Monitoring, and monitoring of stray current device passes through RS485 and uses mark
Quasi- Modbus agreement is communicated with external stray electrical current intelligence sensor, can acquire the data of now multiple intelligence sensors,
Networking flexibility, wiring are simple, convenient to measure to difference.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the distributed monitoring of stray current schematic illustration of the utility model；
Fig. 3 is the control principle schematic diagram of SS3C6410 processor
Fig. 4 is power supply circuit structural schematic diagram；
Fig. 5 is isolated power supply electrical block diagram；
Fig. 6 is that 5V is converted to 3.3V circuit construction of electric power schematic diagram；
Fig. 7 is ethernet interface circuit structural schematic diagram；
Fig. 8 is Ethernet peripheral circuit structural schematic diagram；
Fig. 9: RS485 peripheral circuit structural schematic diagram.
Specific embodiment
Specific embodiment one, Metro Stray Current Monitoring device, it includes S3C6410 processor 10, stray electrical current intelligence
It can sensor 11, Ethernet interface 12, RS485 bus 13,14 power circuit 15 of RS232 interface, RAM16 and FLASH；
The stray electrical current intelligence sensor 11 is for acquiring metro stray current；The stray electrical current intelligence sensor 11
Signal output end connect by the stray electrical current acquisition signal input part of RS485 bus 13 and S3C6410 processor 10；
The data terminal of the Ethernet interface 12 is connect with the Ethernet data end of S3C6410 processor 10；
The RS232 data terminal of the RS232 interface 14 is connect with the RS232 data terminal of S3C6410 processor 10；
The power end of the power circuit 15 is connect with the power end of S3C6410 processor 10；
The end RAM of the RAM16 is connect with the end RAM of S3C6410 processor 10；
The end FLASH of the FLASH is connect with the end FLASH of S3C6410 processor 10.
The dress of Metro Stray Current Monitoring described in specific embodiment two, present embodiment and specific embodiment one
The difference set is that FLASH is NAND FLASH17.
The dress of Metro Stray Current Monitoring described in specific embodiment three, present embodiment and specific embodiment one
The difference set is that Ethernet interface 12 includes Ethernet optical port and Ethernet power port.
The dress of Metro Stray Current Monitoring described in specific embodiment four, present embodiment and specific embodiment one
The difference set is that the quantity of the stray electrical current intelligence sensor 11 is M, and M is positive integer, the M stray electrical current intelligence
Energy sensor 11 is laid in the different location of subway, is used to acquisition metro stray current.
The dress of Metro Stray Current Monitoring described in specific embodiment five, present embodiment and specific embodiment one
The difference set is that it further includes touch screen 19, push button signalling output end and the S3C6410 processor 10 of the touch screen 19
The connection of push button signalling input terminal.
Specific embodiment six illustrates present embodiment in conjunction with Fig. 4.Present embodiment and specific embodiment
The difference of Metro Stray Current Monitoring device described in one is that power circuit 15 is defeated including AC power supplies input interface, DC power supply
Incoming interface, current foldback circuit, overvoltage crowbar, differential mode voltage filter circuit, differential-mode current filter circuit, common mode current filter
Wave circuit, common-mode voltage filter circuit, counnter attack diode, DC-DC power module, No.1 power output interface, No.1 power supply are defeated
Outgoing interface, AC-DC power module, the first power output interface, second source output interface and rear class power circuit 56；
The AC power source signal output end and the AC power source signal of current foldback circuit 43 of the AC power supplies input interface 41 are defeated
Enter end connection；The DC power supply signal output end of the DC power supply input interface 42 and the DC power supply signal of current foldback circuit 43 are defeated
Enter end connection；The DC power supply signal output end of the current foldback circuit 43 and the power supply signal input of overvoltage crowbar 44
Connection；The power supply signal output end of the overvoltage crowbar 44 and the power supply signal input of differential-mode current filter circuit 46 connect
It connects；The power supply signal output end of the overvoltage crowbar 44 and the power supply signal input of differential mode voltage filter circuit 45 connect
It connects；The power supply signal output end of the differential mode voltage filter circuit 45 and the power supply signal input of differential-mode current filter circuit 46
Connection；The 46 power supply signal output end of differential-mode current filter circuit and common mode current filtering circuit 47；
The power supply signal output end of the common mode current filter circuit 47 and the power supply signal of common-mode voltage filter circuit 48
Input terminal connection；
The power supply signal output end of the common-mode voltage filter circuit 48 while one end with counnter attack diode 49 and AC-DC
The power supply signal input of power module 53 connects；The other end of the counnter attack diode 49 connects DC-DC power module simultaneously
50 power input and the power input of No.1 power output interface 51；
The power supply signal of the power supply signal output end of the DC-DC power module 50 and No. two power output interfaces 52 inputs
End connection；
First power output end of the AC-DC power module 53 power supply signal with the first power output interface 54 respectively
Input terminal is connected with the power supply signal input of second source output interface 55；
The power supply signal output end of No. two power output interfaces 52 and the power supply signal output of AC-DC power module 53
It holds and is not connect with two power supply signal inputs of rear class power circuit 56.
Specific embodiment seven illustrates present embodiment, present embodiment and specific embodiment in conjunction with Fig. 5
The difference of Metro Stray Current Monitoring device described in six is that it further includes isolation circuit, and the isolation circuit is connected on electricity
Between source circuit 15 and S3C6410 processor 10；
The isolation circuit include 3 AC power supplies chip J1, varistor RV1, varistor RV2, varistor RV3,
Resistance F1, resistance F2, transformer CM1, capacitor CX1, capacitor CY1, capacitor CY2, inductance LDM1, chip DC1 and chip AC1, two
Pole pipe D3, D4；
2 feet of 3 AC power supplies chip J1 simultaneously with one end of varistor RV2, one end of varistor RV1, capacitor CX1
One end, transformer CM1 pair side one end connection；
1 foot of 3 AC power supplies chips J1 simultaneously with one end of resistance F2, the other end of varistor RV2, pressure-sensitive electricity
Hinder the other end connection of RV3；
The other end of the inductance LDM1 simultaneously with the other end on transformer CM1 pair side, one end of capacitor CY1 and capacitor
One end of CY2 connects；
The other end of the capacitor CY2 is connect with one end of transformer CM1 primary side；
1 foot of chip DC1 connects the anode and power ground of diode D4 simultaneously；
2 feet of chip DC1 connect the cathode of diode D3 simultaneously；
1 foot and 4 feet of chip AC1 connects power ground.
Metro stray current composite monitoring device is a kind of distributed stray electrical current on-line monitoring system, is applied to subway
Or in light rail tractive power supply system, it is used to real-time monitoring metro stray current and its related physical quantity.By RS485 be mounted on
Stray electrical current intelligence sensor by guide rail is communicated.Intelligence sensor collection site without train operation when reference electrode
Drainage net current potential when body potential, structural steel current potential when train operation and train operation, and can be according to these collection value meters
Corresponding polarization potential and average value etc. are calculated, monitoring device is then responsible for making a copy of the calculated result of intelligence sensor, to judge
Condition whether drainage is communicated with drainage cabinet controller, driving current drainage cabinet IGBT conducting and shutdown, to reach drainage
Purpose；Meanwhile monitoring device can also be communicated with main website, and data are uploaded main website, are checked for staff, be carried out to data
Analysis.Monitoring device provides various communication interfaces, flexibly can carry out data interaction with other equipment, clever according to field condition
Adjustment living, scramble current monitoring system principle are as shown in Figure 1.Concrete function is as follows:
The polarization value for storing primary each sampling period at interval of 1 hour uses the tool of compression of linux to data file
It can store the historical data of at least three moon, the Various types of data of the cooperation analysis software available period is miscellaneous to study
Electrolytic corrosion trend is dissipated, corresponding drainage measure is formulated.
Human-computer interaction function shows real-time buried metal polarization potential, setting time using 8 cun of TFT liquid crystal touch screens
Positive polarization average value in section, the real-time polarization of the reference electrode body potential value on the same day and optional channel, resolving time
Potential curve.
With RS485 interface supports communication agreement, Various types of data can be transferred to control centre.
With Ethernet interface, historical data can be transferred to electricity by transport protocol by compatible fiber Ethernet interface
Brain simultaneously analysis software can be used to analyze it.
Subway stray current supervising device is based on 6410 embedded equipment of Samsung, realizes data using its powerful function
Acquisition, data storage, data are shown and the functions such as data transmission.The device has flexible communication interface, simultaneously by RS485
It is communicated, can be mounted in 485 bus multiple using standard Modbus agreement and external stray electrical current intelligence sensor
Stray electrical current intelligence sensor is carried out making a copy of for data by the way of poll, that is, acquires the number of stray electrical current intelligence sensor
Value.Meanwhile monitoring of stray current device is connect by Ethernet with main website, is communicated using 104 specifications, by monitoring device
Data are uploaded to main website, consult for staff, analysis.104 be that International Electrotechnical Commission (IEC) is remote in order to meet 101 in itself
What dynamic communication protocol was formulated for Ethernet realization.Relay protection fault information and SCADA prison be both able to satisfy using 104 specifications
The transmission requirement of information is controlled, and has the good compatibility of Standards Code.This communication protocol, more traditional communication mode more may be used
It leans on, it is more standardized, it can be more bonded the development trend of local area network in the station based on Ethernet, facilitate transmission and management, and hold
Easily realize the conversion of IEC61850 specification.Ethernet segment is integrated with two-way optical port simultaneously, can be used for light networking, is practical
Application places are answered to provide a variety of networking modes.RS232 passes through for 6410 and the communication of liquid crystal display, monitoring of stray current device
RS232 will need content transmission to be shown to liquid crystal display, check for staff, system block diagram is as shown in Figure 2.
S3C6410 is 32 ARM11 cores, and dominant frequency is up to 573MHZ, with ROM in static state RAM and 32K piece in 4K piece.By
It is smaller in space in S3C6410 piece, only meet the operation and storage of bootstrap, extends out RAM and FLASH so using.
The structural block diagram of S3C6410 is as shown in Figure 3.
1) there are multiple serial line interfaces, including 4 UART interfaces, an iic bus interface, two spi bus interfaces, one
A IIS bus；
2) S3C6410 have up to 187 multi-functional inputs output I/O port, and support up to 127 external interrupts,
And it can control the sleep mode state of I/O port to reduce power consumption；
It 3) include 4 dma controllers, each dma controller supports 8 transmission channels, and unidirectional biography is supported in each channel
It is defeated；
4) have a RTC real-time clock, day error reach 0.1S；
It 5) include 5 32 bit timing devices, wherein 4 have the function of PWM；
6) there is 10, a 8 channel ADC, highest conversion rate reaches 500KSPS, function is kept with piece up-sampling,
Support power interruptions mode；
7) a USB HOST interface and a USB OTG interface are had, the USB device of principal and subordinate is supported to access；
8) there is a WDT, can be resetted in program exception.
Used circuit specific structure is as follows:
(1) power circuit
The power supply of this monitoring device can select 85-264VAC, 100-370VDC power supply or 24VDC power supply as needed.
Three kinds of power supply modes are required to power supply EMC protection circuit, and carry out voltage transformation by corresponding power module, to obtain device
Required direct operating voltage, power supply block diagram is as shown in figure 4, bold portion is 85-264VAC, 100-370VDC power supply in figure
Part, dotted line are 24VDC power pack, and dash area is three kinds of power supply mode common sparings.The ratio of circuit designed by the present apparatus
Traditional circuit has relatively reliable anti-interference and more flexible power supply mode, has the protection of multiple voltage and current, can
The interference volumes such as difference, the common mode in route are effectively filtered out, guarantee the reliable and stable operation of device, 85-264VAC and 100-370VDC
Two kinds of power supplys can be used instead directly, only need to weld upper counnter attack diode when using 24VDC power supply and replace power module, this
Device can effectively avoid the case where causing device that can not work due to the power supply because not being suitble to, and circuit diagram is as shown in Figure 5.
The operating voltage of S3C6410 is 3.3VDC, and the operating voltage of communicating circuit is 5VDC.Since communicating circuit needs connect
By external signal, interference volume is easily introduced in this way, causes the breaking-up of communicating circuit even core cpu circuit, so in order to anti-
Communicating circuit power supply is carried out isolation processing, provided for communicating circuit by the only normal work of external influences equipment, the present apparatus
Independent power supply.Isolated power supply circuit block diagram is as shown in Figure 6.Isolation circuit core devices are isolated power supply module, pass through isolation
The 5VDC power supply of system is converted to isolation 5V power supply by power module, while effectively being filtered for the power supply after isolation, this side
Case can effectively prevent interference volume to enter device by device earth-return, cause the damage of core circuit, cause device work different
Often, cause accident.The circuit diagram of isolated power supply is as shown in Figure 7.
The operating voltage of 3.3VDC needed for device is converted 5VDC voltage by LM1085 power supply chip, which mentions
For being up to the output electric current of 3A, the consumption in operation of S3C6410 and peripheral circuit can satisfy, circuit diagram is as shown in Figure 8.
(2) ethernet circuit
Metro Stray Current Monitoring device is communicated by Ethernet with daemon software, but S3C6410 do not provide with
Too net controller, so needing external ethernet controller and PHY chip.Having selected AX88796C, this is integrated with mac controller
With the Ethernet chip of PHY function, which has the communication mode of SPI communication and the high performance non-locality PCI bus.In view of
The powerful address of the high-speed and S3C6410 of Ethernet, data/address bus, use the high performance non-locality PCI bus and it is logical
Letter.
Compared with traditional Industrial Ethernet design, the present apparatus is more flexible to carry out the optical port of Ethernet and power port
Compatible design, i.e., same Ethernet can not only use power port communication modes, but also can use optical-fibre communications mode, in addition, signal
Electrostatic protection processing has also been done in transmission process, and is transmitted to Ethernet external interface, isolating transformer by isolating transformer
The signal wire that rear end is isolated is linked into electricity simultaneously and turns optical chip, and Ethernet optical fiber conversion chip uses KSZ8863MLL/FLL/
RLL is output to optic module interface by the processing of the chip, for using.Ethernet circuit block diagram is as shown in Figure 9.
(3) RS485 circuit
Metro stray current composite monitoring device provides RS485 communication interface simultaneously and uses master station in agreement and station institute
It is communicated.Since S3C6410 is not integrated with RS485 chip, MAX485 chip is used by serial ports and is converted to RS485
Interface, and add the isolation of magnetic coupling and EMC protection.And the half-duplex mechanism of RS485 is realized by peripheral circuit, i.e., when RS485 core
When piece is sent, forbidden energy receives function.
(4) touch screen circuitry
Monitoring of stray current device is equipped with the liquid crystal screen module of tangible operation, more more flexible than traditional button operation
Convenient, the content of display is more abundant, and liquid crystal screen dimensions are up to 8 cun, has good visual experience and operating handle.Liquid crystal display
Interface it is simple, can be communicated by RS232 or RS485 with core board, installation is simple, easy to maintain.Due to
S3C6410 is not integrated with MAX232 chip, so wanting additional MAX232 circuit.
Claims (7)
1. Metro Stray Current Monitoring device, it includes S3C6410 processor (10), and it is characterized in that: further comprising stray electrical currents
Intelligence sensor (11), Ethernet interface (12), RS485 bus (13), RS232 interface (14), power circuit (15), RAM
(16) and FLASH；
The stray electrical current intelligence sensor (11) is for acquiring metro stray current；The stray electrical current intelligence sensor (11)
Signal output end connect by the stray electrical current acquisition signal input part of RS485 bus (13) and S3C6410 processor (10)；
The data terminal of the Ethernet interface (12) is connect with the Ethernet data end of S3C6410 processor (10)；
The RS232 data terminal of the RS232 interface (14) is connect with the RS232 data terminal of S3C6410 processor (10)；
The power end of the power circuit (15) is connect with the power end of S3C6410 processor (10)；
The end RAM of the RAM (16) is connect with the end RAM of S3C6410 processor (10)；
The end FLASH of the FLASH is connect with the end FLASH of S3C6410 processor (10).
2. Metro Stray Current Monitoring device according to claim 1, it is characterised in that FLASH is NAND FLASH
(17)。
3. Metro Stray Current Monitoring device according to claim 1, it is characterised in that Ethernet interface (12) include with
Too net optical port and Ethernet power port.
4. Metro Stray Current Monitoring device according to claim 1, it is characterised in that the stray electrical current intelligent sensing
The quantity of device (11) is M, and M is positive integer, and the M stray electrical current intelligence sensor (11) is laid in the different positions of subway
It sets.
5. Metro Stray Current Monitoring device according to claim 1, it is characterised in that it further includes touch screen (19), institute
The push button signalling output end for stating touch screen (19) is connect with the push button signalling input terminal of S3C6410 processor (10).
6. Metro Stray Current Monitoring device according to claim 5, it is characterised in that power circuit (15) includes AC electricity
Source input interface, DC power supply input interface, current foldback circuit, overvoltage crowbar, differential mode voltage filter circuit (45), differential mode
Current filtering circuit (46), common mode current filter circuit (47), common-mode voltage filter circuit, counnter attack diode, DC-DC power source mould
Block, No.1 power output interface, No.1 power output interface, AC-DC power module, the first power output interface (54), second
Power output interface and rear class power circuit (56)；
The AC power source signal output end and the AC power source signal of current foldback circuit (43) of the AC power supplies input interface (41) are defeated
Enter end connection；The DC power supply signal output end of the DC power supply input interface (42) and the DC power supply of current foldback circuit (43) are believed
The connection of number input terminal；The DC power supply signal output end of the current foldback circuit (43) and the power supply of overvoltage crowbar (44) are believed
The connection of number input terminal；The power supply signal output end of the overvoltage crowbar (44) and the power supply of differential-mode current filter circuit (46)
Signal input part connection；The power supply signal output end of the overvoltage crowbar (44) and the electricity of differential mode voltage filter circuit (45)
The connection of source signal input terminal；The power supply signal output end and differential-mode current filter circuit of the differential mode voltage filter circuit (45)
(46) power supply signal input connection；Differential-mode current filter circuit (46) the power supply signal output end and common mode current filtering
Circuit (47), the power supply signal output end of the common mode current filter circuit (47) and the power supply of common-mode voltage filter circuit (48)
Signal input part connection；
The power supply signal output end of the common-mode voltage filter circuit (48) while one end with counnter attack diode (49) and AC-DC
The power supply signal input of power module (53) connects；The other end of the counnter attack diode (49) connects DC-DC power source simultaneously
The power input of module (50) and the power input of No.1 power output interface (51)；
The power supply signal output end of the DC-DC power module (50) and the power supply signal of No. two power output interfaces (52) input
End connection；
First power output end of the AC-DC power module (53) power supply signal with the first power output interface (54) respectively
Input terminal is connected with the power supply signal input of second source output interface (55)；
The power supply signal output end of No. two power output interfaces (52) and the power supply signal output of AC-DC power module (53)
End is connect with two power supply signal inputs of rear class power circuit (56) respectively.
7. Metro Stray Current Monitoring device according to claim 6, it is characterised in that it further includes isolation circuit, described
Isolation circuit is connected between power circuit (15) and 3C6410 processor (10)；
The isolation circuit includes 3 AC power supplies chip J1, varistor RV1, varistor RV2, varistor RV3, resistance
F1, resistance F2, transformer CM1, capacitor CX1, capacitor CY1, capacitor CY2, inductance LDM1, chip DC1 and chip AC1, diode
D3,D4；
2 feet of 3 AC power supplies chip J1 simultaneously with one end of varistor RV2, one end of varistor RV1, capacitor CX1 one
One end connection at end, transformer CM1 pair side；
1 foot of 3 AC power supplies chips J1 simultaneously with one end of resistance F2, the other end of varistor RV2, varistor
The other end of RV3 connects；
The other end of the inductance LDM1 simultaneously with the other end on transformer CM1 pair side, one end of capacitor CY1 and capacitor CY2
One end connection；
The other end of the capacitor CY2 is connect with one end of transformer CM1 primary side；
1 foot of chip DC1 connects the anode and power ground of diode D4 simultaneously；
2 feet of chip DC1 connect the cathode of diode D3 simultaneously；
1 foot and 4 feet of chip AC1 connects power ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920268803.3U CN209590123U (en) | 2019-03-04 | 2019-03-04 | Metro Stray Current Monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920268803.3U CN209590123U (en) | 2019-03-04 | 2019-03-04 | Metro Stray Current Monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209590123U true CN209590123U (en) | 2019-11-05 |
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ID=68371338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920268803.3U Active CN209590123U (en) | 2019-03-04 | 2019-03-04 | Metro Stray Current Monitoring device |
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| Country | Link |
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| CN (1) | CN209590123U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034951A (en) * | 2021-10-29 | 2022-02-11 | 许昌开普检测研究院股份有限公司 | Measurement data statistical analysis method and system for noise immunity test |
-
2019
- 2019-03-04 CN CN201920268803.3U patent/CN209590123U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034951A (en) * | 2021-10-29 | 2022-02-11 | 许昌开普检测研究院股份有限公司 | Measurement data statistical analysis method and system for noise immunity test |
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