CN208723624U - A kind of power remote distributed terminal - Google Patents

Abstract

The utility model discloses a kind of power remote distributed terminals, it is related to railway equipment technical field；LCD circuit, telemetric circuit, remote signalling circuit is electrically unidirectionally connect by conducting wire with CPU processing circuit, CPU processing circuit passes through conducting wire and communicating circuit, key circuit, remote control circuit is electrically bi-directionally connected, the utility model is applied in railway signal system, distributed type minisize RTU is uniformly controlled all signals of single channel, by all measurements, control, the equal local units of signals such as protection are processed into data-signal and 485 bus transfers to communication manager, transmission data are sent to control centre by Ethernet after again being summarized information from communication manager, each local unit is mutually indepedent, it is independent of each other, it will not lead to whole paralysis because of local fault, and its reliability is high, strong antijamming capability, conducive to construction site, installation and debugging and fault location, save a large amount of secondary cable level-one control room Area.

Description

A kind of power remote distributed terminal

Technical field

The utility model belongs to railway equipment technical field, and in particular to a kind of power remote distributed terminal.

Background technique

Railway is national economy main artery, critical infrastructures and great people's livelihood engineering, is overall transportation system One of backbone and prevailing traffic mode have very high status and vital effect, iron in China's socio-economic development Main traffic mode of the road as China's communications and transportation, because its speed of service is fast, ability is big, safety and comfort, transportation cost are low, Environmental protection and climate influence the advantages that smaller, along with China's national territorial area is big, has a large population, maldistribution of the resources weighing apparatus, and various regions hair It is inconsistent to open up speed, there are no the vehicles effectively transported so far in some areas, rely on railway all to carry out the length of cargo Way is transported, and passenger transport industry is based on railway transportation, it is known that railway plays an important role in China's traffic system.

With the fast development of China's economy and science and technology, China railways reform and development also achieves noticeable achievement, china railway business Mileage is up to 150,000 kilometers, and wherein 30,000 kilometers of high-speed railway, complex line rate and electrization rate have respectively reached 60% and 70% or so, Rationally distributed extensive, well arranged, the safe and efficient railway network of covering is basically formed.With the hair at full speed of high-speed rail technology Exhibition, China's high-speed rail network have covered most of main cities, and as the construction of high-speed rail network is perfect, railway power telemechanical Control technology is also constantly developing, and railway power motion technology plays the important and pivotal role in the railway system, and electric The quality of power motion technology directly affects the reliability and convenience of railway operation, and then the moment is flourishing power remote technology The security reliability of railway system's power supply provides safeguard, and reduces the daily maintenance of the railway system.

The general objective of railway technology development is to realize the modernization of railway.Realize railway technology equipment modernization and railway fortune Battalion's IT application in management is to realize one of the key task of railway modernization.The technical equipment of railway mainly includes route, communication letter The power supply unit of the electric railways such as number equipment, station, locomotive, vehicle and the traction substation of downline road distribution.Railway Operation management informationization is primarily referred to as realizing that system-wide passenger ticket is sold and made a reservation for by building up integrated railway operation management information system The networking operation of system, is improved and appliance computer works out route map of train automatically, for the railway power system of dispersity Each key link carries out centralized watch, control and automatized dispatching and controlling, realizes the organic linking of each management system, realizes every It cooperates between function, data, information sharing.

The realization of the railway technology equipment of modernization and information-based railway operation management all rely on safety, continue, can The normal work of the railway power system leaned on.Power supply system be by power generation, transmission of electricity, become one that distribution and electricity system constitute it is whole Body.Railways system includes two large divisions, is railway traction power supply system and railway power power supply system respectively.Rail traction Power supply system mainly passes through traction substation and contact net and powers to electric locomotive, i.e., provides electricity to the traveled portion of railway Source.The reliability of tractive power supply system impacts traffic safety.Railway power power supply system undertakes institute other than traction power supply There are the railways such as the power supply task, including signal system, communication system, station, water system and life of railway load negative Lotus, the power supply reliability of railway power power supply system not only directly affect the normal operation of rail transportation system, are also relate to very Can more railway functional departments work normally.

Utility model content

Traffic safety is impacted to solve the reliability of existing tractive power supply system, the confession of railway power power supply system Electric reliability not only directly affects the normal operation of rail transportation system, and can be also relate to many railway functional departments normal work The problem of making；The purpose of this utility model is to provide a kind of power remote distributed terminals.

A kind of power remote distributed terminal of the utility model, it includes power circuit, LCD circuit, key circuit, leads to Interrogate circuit, CPU processing circuit, telemetric circuit, remote control circuit, remote signalling circuit；LCD circuit, telemetric circuit, remote signalling circuit are by leading Line is electrically unidirectionally connect with CPU processing circuit, and CPU processing circuit passes through conducting wire and communicating circuit, key circuit, remote control circuit electricity Property be bi-directionally connected, CPU processing circuit use LPC1768 chip, LPC1768 chip use Cortex-M3 microprocessor, The external module of Cortex-M3 microprocessor includes the up to flash storage of 512KB, the data storage of 64KB, Ethernet MAC, usb host/slave/OTG interface, the general dma controller in 8 channels, 4 UART, 2 channels CAN, 2 SSP controls Device, SPI interface, 3 I²The I that C interface, 2- input and 2- are exported²S interface, 12 ADC in 8 channels, 10 DAC, motor control PWM processed, orthogonal encoder interface, 4 general purpose timers, the general PWM of 6- output, the battery-powered ultralow RTC of band independent electrical and 70 general I/O pins.

Preferably, the 220V alternating current that outside provides is converted to direct current by the power circuit, pressure stabilizing electricity is used Source module provides stable DC5V and DV3.3V power supply；Power supply is DC3V3, and the power supply is by AC220V through power module LD05- DC5V power supply is obtained after 20B05 conversion, is then obtained by linear LDO chip transformation, LDO chip is LM1085-3.3 power supply core Piece.

Preferably, the communicating circuit includes communication isolated power supply circuit, RS485 telecommunication circuit, ethernet circuit；It is logical Interrogate isolated power supply circuit be isolated power supply power, RS485 telecommunication circuit, ethernet circuit respectively with RS485 communication interface, ether Netcom's communication interface is electrically connected, and RS485 communication interface is communicated using Modbus agreement with communication manager；Communication isolation electricity Source circuit turns AC220V to supply RS485 telecommunication circuit after isolated power supply module B0505LS-1WR2 isolation after DC5V, first Alternating current 220V power supply is converted to DC5V by LD05-20B05 power module, and isolated power supply module is flowed to after capacitor filtering B0505LS-1WR2, obtains ISO_5V power supply after isolation, finally flow to ADM2483BRWZ chip, for 485 communicating circuits provide every From power supply；3V3 power supply of the front end electricity consumption of ADM2483BRWZ chip from power circuit.

Preferably, the remote control circuit includes remote circuit control circuit, relay circuit, remote state amount acquisition electricity Road, remote control driving circuit；Remote circuit control circuit is electrically connected by conducting wire and relay circuit, remote control driving circuit difference It is electrically connected by conducting wire and remote state amount Acquisition Circuit, relay circuit, relay circuit is remotely controlled by conducting wire with 4 tunnels defeated Outgoing interface is electrically connected.

Preferably, the LCD circuit is the liquid crystal display of JLX12864, liquid crystal display is electrically connected by conducting wire with key circuit It connects, key circuit is four keys.

Preferably, the remote signalling circuit includes communication isolating power circuit, communications status amount Acquisition Circuit, signal of communication Conditioning circuit, communications status amount indicating circuit；Communication isolating power circuit and communications status amount Acquisition Circuit, signal of communication improve Circuit, communications status amount indicating circuit are electrically connected power supply, and remote signals conditioning circuit passes through conducting wire and communications status amount respectively Acquisition Circuit, communications status amount indicating circuit are electrically connected.

Preferably, the telemetric circuit includes voltage collection circuit, current collection circuit；Telemetric circuit progress voltage, The acquisition of the magnitude of current.

Preferably, the CPU processing circuit includes CPU peripheral circuit, I/O port interlock circuit；CPU peripheral circuit includes Crystal oscillating circuit, jtag circuit, electrification reset circuit, RTC circuit and FLASH；Crystal oscillating circuit includes RTC crystal oscillator and CPU1768 master Crystal oscillator, RTC crystal oscillator have source crystal oscillator using 12MHz using no source crystal oscillator 32.768KHz, the vibration of CPU1768 oikocryst.

Compared with prior art, the utility model has the following beneficial effects: being applied in railway signal system, it is used to railway The electric quantity acquisition of signal high-low voltage power source independent loop, data are analyzed and the distributed single loop RTU of computing function, distribution decline Type RTU is uniformly controlled all signals of single channel, and a remote terminal unit is arranged in each circuit, by all surveys The equal local units of signals such as amount, control, protection are processed into data-signal and 485 bus transfers to communication manager, then by leading to News supervisor is sent to control centre by Ethernet after summarizing information and transmits data, and each local unit is mutually indepedent, mutually not It influences, this distributed tupe ensure that system will not lead to whole paralysis, and its reliability because of local fault Height, strong antijamming capability are conducive to construction site, installation and debugging and fault location, save a large amount of secondary cable level-one control The area of room.

Detailed description of the invention

The present invention is described in detail by the following detailed description and drawings for ease of explanation,.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is that LPC1768 simplifies structural block diagram in the utility model；

Fig. 3 is the circuit diagram of power circuit in the utility model；

Fig. 4 is the circuit diagram that isolated power supply circuit is communicated in the utility model；

Fig. 5 is the circuit diagram of remote circuit control circuit in the utility model；

Fig. 6 is the circuit diagram of communicating circuit in the utility model；

Fig. 7 is the circuit diagram of remote control circuit in the utility model；

Fig. 8 is the circuit diagram for communicating input in the utility model in remote signalling circuit；

Fig. 9 is the circuit diagram for communicating and acquiring in remote signalling circuit in the utility model；

Figure 10 is the circuit diagram of transformer circuit in the utility model；

Figure 11 is the I2C interface circuit diagram of ADE7878 and LPC1768 in the utility model；

Figure 12 is the HSDC interface circuit figure of ADE7878 and LPC1768 in the utility model.

Specific embodiment

To make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality With novel range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid unnecessarily mixing Confuse the concept of the utility model.

Here, it should also be noted that, in order to avoid having obscured the utility model because of unnecessary details, in the accompanying drawings It illustrate only the structure and/or processing step closely related with scheme according to the present utility model, and be omitted practical with this The little other details of new relationship.

As shown in Figure 1, present embodiment uses following technical scheme: it includes power circuit, LCD circuit, key Circuit, communicating circuit, CPU processing circuit, telemetric circuit, remote control circuit, remote signalling circuit；LCD circuit, telemetric circuit, remote signalling electricity Road is electrically unidirectionally connect by conducting wire with CPU processing circuit, and CPU processing circuit passes through conducting wire and communicating circuit, key circuit, distant Control circuit is electrically bi-directionally connected, and CPU processing circuit uses LPC1768 chip, and LPC1768 chip uses the micro- place Cortex-M3 Manage device, the external module of Cortex-M3 microprocessor include up to the flash storage of 512KB, 64KB data storage, Ethernet mac, usb host/slave/OTG interface, the general dma controller in 8 channels, 4 UART, 2 channels CAN, 2 SSP Controller, SPI interface, 3 I²The I that C interface, 2- input and 2- are exported²S interface, 8 channels 12 ADC, 10 DAC, electricity It is battery-powered ultralow that machine controls PWM, orthogonal encoder interface, 4 general purpose timers, the general PWM of 6- output, band independent electrical RTC and 70 general I/O pin.

As shown in figure 3, further, the 220V alternating current that outside provides is converted to direct current by the power circuit, is adopted Stable DC5V and DV3.3V power supply is provided with power module of voltage regulation；Power supply is DC3V3, and the power supply is by AC220V through power supply DC5V power supply is obtained after module LD05-20B05 conversion, is then obtained by linear LDO chip transformation, LDO chip is LM1085- 3.3 power supply chip.

As described in Fig. 4, Fig. 6, further, the communicating circuit includes communication isolated power supply circuit, RS485 communication electricity Road, ethernet circuit；Communicate isolated power supply circuit be isolated power supply power, RS485 telecommunication circuit, ethernet circuit respectively with RS485 communication interface, ethernet communication interface are electrically connected, and RS485 communication interface uses Modbus agreement and communication manager It is communicated.

RS485 communicating circuit uses the common RS485 communicating circuit of company, using MAX485ESA as communication chip, together When by jumper cap CB1 may be implemented whether terminal resistance 120R accesses.RS485 communicating circuit is total to two-way, and serial ports 1 individually draws Out, serial ports 2 and CAN communication circuit multiplexing.Communication chip use MAXESA, using magnetic coupling chip ADUM1201ARZ realize every From, while designing TVS in interface and being protected for EMC.AC220V turn after DC5V through isolated power supply module B0505LS-1WR2 every From rear supply RS485 telecommunication circuit, alternating current 220V power supply first is converted to DC5V by LD05-20B05 power module, through capacitor Isolated power supply module B0505LS-1WR2 is flowed to after filtering, ISO_5V power supply is obtained after isolation, finally flows to ADM2483BRWZ core Piece provides isolated power supply for 485 communicating circuits.3V3 power supply of the front end electricity consumption of ADM2483BRWZ chip from power circuit.

As shown in Figure 5, Figure 7, further, the remote control circuit include remote circuit control circuit, it is relay circuit, distant Control quantity of state Acquisition Circuit, remote control driving circuit；Remote circuit control circuit is electrically connected by conducting wire and relay circuit, distant Control driving circuit passes through conducting wire respectively and remote state amount Acquisition Circuit, relay circuit are electrically connected, and relay circuit passes through Conducting wire and 4 tunnels remote control output interface are electrically connected.

Remote control circuit is provided with the remote control output of 4 tunnels, this module has selected the PA series relay of Panasonic, and relay uses three Pole pipe driving, while remote control back production circuit has also been devised, it is ensured that the Safety output of remote control.Remote control process uses SBO (select before Operation) mode, passing through remote circuit control circuit first when needing to be remotely controlled makes relay Device obtains 5V driving power, while being acquired to power supply status, remote control command is assigned when having collected 5V power supply, and to distant Whether control quantity of state is acquired, determine that remote control executes and succeed.

Remote control driving circuit is driven using integrated circuit ULN2003LVDR, because of totally 7 tunnel, and addition ULN2003LVDR NPN triode is latched as switch driving circuit by the I/O port control latch 74HCT573PW of CPU1768 all the way, real Existing relay control is kept, while ULN2003LVDR driver is also known as phase inverter, therefore inputs the logical value phase with output Instead.

Actuating of relay when to prevent equipment malfunction from making or powering on, is designed power circuit, circuit passes through CPU1768 I/O port go the on-off of control metal-oxide-semiconductor SI4953DY, to control the conducting of relay power, when P-channel metal-oxide-semiconductor grid is low When be connected, at this time P1 be it is high, QP2 is low.Designing indicator light has been used to indicate whether that voltage passes through simultaneously.

Further, the LCD circuit is the liquid crystal display of JLX12864, and liquid crystal display is electrically connected by conducting wire with key circuit It connects, key circuit is four keys, and JLX12864G can show 128 column *, 64 row dot matrix monochromatic picture, or display 8/row * 4 The Chinese character of row 16*16 dot matrix, or English, number, the symbol of display 16/row *, 8 row 8*8 dot matrix.The LCD is practical and convenient, shows Clearly, it is widely used in various human-computer interaction display interfaces.

As shown in Figure 8, Figure 9, further, the remote signalling circuit includes that communication isolating power circuit, communications status amount are adopted Collector, signal of communication conditioning circuit, communications status amount indicating circuit；Communication isolating power circuit and communications status amount acquisition electricity Road, signal of communication conditioning circuit, communications status amount indicating circuit are electrically connected power supply, and remote signals conditioning circuit passes through respectively leads Line and communications status amount Acquisition Circuit, communications status amount indicating circuit are electrically connected.

Remote signalling circuit is arranged 6 tunnel remote signalling and inputs, and input mode is passive passive node, is multiplexed a common end, passes through optocoupler It realizes electrical isolation, while realizing physical isolation in Design PCB.Remote signalling circuit is divided into remote signalling isolated power supply circuit, remote signalling letter Number conditioning circuit and remote signalling quantity of state Acquisition Circuit.

When not having remote signalling amount input, optocoupler PC354 is not turned on, and phase inverter 74HCT14D input terminal is height, and output end is It is low；When there is remote signalling amount input, optocoupler PC354 conducting, phase inverter 74HCT14D input terminal becomes low from height, and output end is by low change For height.

Remote signalling quantity of state Acquisition Circuit realizes the acquisition to remote signalling quantity of state, realizes remote signalling, remote state by 74HC138 Measure channel selecting.Phase inverter 74HCT14D output end is connected to 74LVC245PW input terminal, and 74LVC245PW output end is connected to The I/O port of CPU1768 is acquired remote signalling quantity of state.

Remote signals conditioning circuit mainly realizes being isolated for external input signal and internal circuit, and input uses passive dry section Point mode, input terminal internal supply voltage are+5V, and remote signalling circuit totally 6 tunnel is multiplexed a common end, wherein 1 road circuit diagram is as schemed Shown in 8, remaining 5 tunnel is identical.

As shown in Figure 10, further, the telemetric circuit includes voltage collection circuit, current collection circuit；Telemetering electricity Road is substantially carried out the acquisition of voltage, the magnitude of current.Including transformer circuit and ADE7878 circuit.

A), transformer circuit designs:

Mutual inductor interlock circuit composition mainly has mutual inductor, filter circuit.Mutual inductor has selected high-precision voltage, electric current Mutual inductor, device support 1 tunnel, 3 phase voltage, 1 tunnel, 3 phase current, are configured to 2 circuits, detailed technology index and circuit please refer to down Table:

Type	Specified input	Rated output	Precision
				Current transformer (TR21228C)	5A	2.5mA	0.2%
Voltage transformer (TR31140C)	280V	2mA	0.2%

Mutual inductor output signal inputs ADE7878 after filtering, and ADE7878 is a high-precision, three phase electric energy measurement IC using serial line interface, and provides three tunnels flexible pulse output.Second order sigma-delta type ADC built in the device, digital integrator, Reference voltage source circuit and all required signal processing circuits, can be performed always (fundamental wave and harmonic wave) active and reactive and view and exist Power measurement, fundamental active and wattless power measurement and virtual value calculate.One fixed function digital signal processor (DSP) it is responsible for executing this signal processing.

ADE7878 be suitble to measure various three lines, four lines three phase arrangement is active and reactive and apparent energy, such as Y shape or three It is angular etc..Respectively mutually all have system calibration function, i.e. virtual value offset correction, phase alignment and gain calibration.CF1, CF2 and The output of CF3 logic can provide many power informations: total/fundamental active/reactive power, total apparent energy or current effective value and.

ADE7878 has waveform sampling register, allows to access all ADC outputs.The device also provides power quality survey Amount, such as: low pressure or high pressure detection, short high current variation, line voltage cycle measurement and phase voltage and electric current in short-term Between angle etc..

ADE7878 has 3 serial ports；I2c, SPI, hsdc each one, the pin multiplexing of SPI pin and the port I2C and HSDC. ADE7878 can only there are two types of configurations；The port I2C and HSDC, SPI port.After the reset, if SS pin is height, then ADE7878 It is defaulted as the port I2C, the port HSDC default is forbidden.If after the reset, SS pin converts 3 times from high to low, then core Piece just will use SPI serial ports, until new hardware reset occurs.

I2C and HSDC combination of interfaces is used in the present apparatus, the I2C interface of ADE7878 specifically connects as slave interface It connecing as shown in figure 11, MCU can send control command to ADE7878 using I2C interface, or read continuous data from ADE7878, The port HSDC is the port that data can be sent to external equipment, and external equipment is generally a microprocessor, can transmit 16 32 words.These words include regarding in, the instantaneous value of idle, active, neutral current, phase voltage, phase current.

Host of the HSDC interface always as communication communicates, and as shown in figure 12, he is made of 3 pins for specific connection: HSCLK, HSD and HSA.Wherein HSLK indicates that serial ports clock, HSD, to from the device, are commonly attached to for serial ports output data The data input pin of counterpart device.HSA is chip selection signal, during the transmission of a word keep effectively, it be commonly connected to from The chip selection signal input terminal of machine.In the present system, the HSDC interface of ADE7878 is connected with the SPI interface of LPC1768.

The HSDC interface of ADE7878 transmits number to LPC1768 by the SPI interface of microprocessor with the speed of 8MBIT/S According to by the value end of transmission of 16 32 instantaneous value waveform registers.The included library FFT of microprocessor calling system is to reception The data arrived carry out FFT transform.

The CPU processing circuit includes CPU peripheral circuit, I/O port interlock circuit；CPU peripheral circuit include crystal oscillating circuit, Jtag circuit, electrification reset circuit, RTC circuit and FLASH etc..

CPU peripheral circuit mainly includes JTAG download circuit, outer watchdog circuit, RTC interlock circuit, crystal oscillating circuit Deng, outer watchdog is mainly used for preventing CPU operation irregularity, in the case where software watchdog failure, guarantee board also Hardware reset may be implemented, enabling dog reset circuit is using 3.3V reset chip MAX706, including electrification reset, spilling period 1.6S.Power-fail detection circuit realizes that periphery cooperates route voltage sampling circuit and falls using MAX706 builtin voltage comparator Electric delay circuit, after having chosen the divider resistance resistance value of line voltage distribution sample circuit, branch pressure voltage is reached during power down MAX706 compares threshold voltage, MAX706 can be made to generate power-off signal, while to win when depositing several of length as far as possible during power down Between, it is typically also provided with bigger delay capacitor.Working power voltage detects signal detection working power state, works as system voltage When lower than 2.7V, low level signal is generated.The signal can make after the effect of power down decision circuitry and reset control circuit MCU resets, avoiding device CPU non-power-failure state, simply because when operating voltage surging enter abnormal condition.

Crystal oscillating circuit mainly includes RTC crystal oscillator and the vibration of CPU1768 oikocryst, RTC crystal oscillator using no source crystal oscillator 32.768KHz, The vibration of CPU1768 oikocryst has source crystal oscillator using 12MHz.Wherein RTC circuit, which both can be used, carries circuit inside CPU, can also make With external RTC circuit, the two crystal oscillator is 32.768KHz.

Distributed type minisize RTU terminal is the embedded equipment based on LPC1768 chip, is acquired using high-precision AD E7878 Chip realizes the acquisition process to loop telemetry number, the functions such as remote control output, the acquisition of remote signalling, failure wave-recording, human-computer interaction.

For LPC1768 to be a in LPC1700 family chip, it uses Cortex-M3 microprocessor, wants for handling Seek highly integrated and low-power consumption Embedded Application.The operating frequency of LPC1768Cortex-M3 microprocessor up to 100MHZ, ARM Cortex-M3CPU has 3 level production lines and Harvard structure, with independent local instruction and data bus and for outer If slightly low performance Article 3 bus.The external module of LPC1768Cortex-M3 microprocessor includes up to 512KB The general DMA control of flash storage, the data storage of 64KB, ethernet mac, usb host/slave/OTG interface, 8 channels Device processed, 4 UART, 2 channels CAN, 2 SSP controllers, SPI interface, 3 I²The I that C interface, 2- input and 2- are exported²S connects Mouth, 12 ADC in 8 channels, 10 DAC, motor control PWM, orthogonal encoder interface, 4 general purpose timers, 6- are exported General PWM, with the battery-powered ultralow RTC of independent electrical and up to 70 general I/O pins.The simplification structural block diagram of LPC1768 It is as shown in Figure 2:

One, ARM Cortex-M3 processor can be run under the up to frequency of 100MHz, and include 8 areas of a support Memory protection unit (MPU), built-in nested vector interrupt controller (NVIC)；

Two, with the 512KB on piece Flash program memory of in-system programming (ISP) and application programming (IAP) function. The position of enhanced Flash storage accelerator and flash storage on CPU local code/data/address bus is integrated, Then Flash can provide high performance code；

Three, there is 64KB on-chip SRAM, including 32KB SRAM to visit for high-performance CPU by local code/data/address bus The operation of the higher amount of spitting can be carried out with 2 16KB SRAM modules, band independent access path by asking.These SRAM modules can be used for Too net, USB, dma memory and universal command and data storage；

Four, with the general dma controller in 8 channels on AHB Multi-layer matrix, in combination with SSP, I²S, UART, modulus sum number Mode converter peripheral hardware, timer matched signal and GPIO are used, and are used for the transmission of memory to memory, multilayer AHB matrix Inside connection, provides independent bus for each AHB host.AHB host include CPU, general dma controller, ethernet mac and USB interface.This internal connection provides the communication without arbitration delays, unless 2 hosts are attempted while accessing a slave；

Five, there are multiple serial line interfaces: 4 UART, 2 CAN bus, SPI controller, 2 SSP controllers, 3 enhancings Type I²C bus interface, 1 I²S (Inter-IC Sound) interface；

Six, there are a 8 Channel 12-Bit analog-digital converters (ADC), can realize that multichannel inputs between 8 pins, conversion speed Rate reaches 1MHz, and has multiple result registers.12 ADC can be used together with GPDMA controller；One 10 digit mould turns Parallel operation (DAC) has dedicated transition timer, and supports dma operation；

Seven, there are 4 general Timer/Counters, share 8 capture inputs and 10 comparison outputs.Each timer mould Block all has an external counting input.Specific timer event may be selected to generate DMA request；

Eight, there is a WatchDog Timer (WDT), can be resetted when abnormal.

Nine, the debugging of jtag test/debugging interface and string line and string line trace port option of standard；

Ten, a real-time clock (RTC), with independent power domain.RTC is driven by dedicated RTC oscillator.

11,4 low-power consumption modes: sleep, deep sleep, power down, depth power down are provided；

12,4 external interrupt inputs, can be configured to edge/level triggers.All pins all may be used on PORT0 and PORT2 For use as the interrupt source of edging trigger.

Present embodiment in order to improve remote real-time monitoring and the management to power supply, the tractive power supply system of railway and The electric system of railway has been all made of Motion Technology, and motion technology is all based on the Remote monitor and control system of SCADA technology.And divide The miniature RTU terminal of cloth is exactly a terminal device in Railway Electric Traction Telemechanical System, is responsible for the power supply to communication, signal system Facility carries out data acquisition and control, monitors safety management operation in real time for Railway Electric Traction Telemechanical System and provides important leverage.

Claims (8)

1. a kind of power remote distributed terminal, it is characterised in that: it includes power circuit, LCD circuit, key circuit, communication Circuit, CPU processing circuit, telemetric circuit, remote control circuit, remote signalling circuit；LCD circuit, telemetric circuit, remote signalling circuit pass through conducting wire It is electrically unidirectionally connect with CPU processing circuit, CPU processing circuit is electrical by conducting wire and communicating circuit, key circuit, remote control circuit It being bi-directionally connected, CPU processing circuit uses LPC1768 chip, and LPC1768 chip uses Cortex-M3 microprocessor, The external module of Cortex-M3 microprocessor includes the up to flash storage of 512KB, the data storage of 64KB, Ethernet MAC, usb host/slave/OTG interface, the general dma controller in 8 channels, 4 UART, 2 channels CAN, 2 SSP controls Device, SPI interface, 3 I²The I that C interface, 2- input and 2- are exported²S interface, 12 ADC in 8 channels, 10 DAC, motor control PWM processed, orthogonal encoder interface, 4 general purpose timers, the general PWM of 6- output, the battery-powered ultralow RTC of band independent electrical and 70 general I/O pins.

2. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the power circuit will be external The 220V alternating current of offer is converted to direct current, and stable DC5V and DV3.3V power supply is provided using power module of voltage regulation； Power supply is DC3V3, which obtains DC5V power supply after power module LD05-20B05 conversion by AC220V, then by linear LDO chip transformation obtains, and LDO chip is LM1085-3.3 power supply chip.

3. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the communicating circuit includes logical Interrogate isolated power supply circuit, RS485 telecommunication circuit, ethernet circuit；Isolated power supply circuit is communicated as isolated power supply power supply, RS485 Telecommunication circuit, ethernet circuit are electrically connected with RS485 communication interface, ethernet communication interface respectively, and RS485 communication interface makes It is communicated with Modbus agreement with communication manager；Communication isolated power supply circuit turns AC220V after DC5V through isolated power supply mould RS485 telecommunication circuit is supplied after block B0505LS-1WR2 isolation, alternating current 220V power supply first passes through LD05-20B05 power module DC5V is converted to, isolated power supply module B0505LS-1WR2 is flowed to after capacitor filtering, ISO_5V power supply is obtained after isolation, finally ADM2483BRWZ chip is flowed to, provides isolated power supply for 485 communicating circuits；The front end electricity consumption of ADM2483BRWZ chip is from electricity The 3V3 power supply of source circuit.

4. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the remote control circuit includes distant Control power control circuit, relay circuit, remote state amount Acquisition Circuit, remote control driving circuit；Remote circuit control circuit is logical It crosses conducting wire and relay circuit is electrically connected, remote control driving circuit passes through conducting wire and remote state amount Acquisition Circuit, relay respectively Device circuit is electrically connected, and relay circuit is remotely controlled output interface by conducting wire and 4 tunnels and is electrically connected.

5. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the LCD circuit is The liquid crystal display of JLX12864, liquid crystal display are electrically connected by conducting wire and key circuit, and key circuit is four keys.

6. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the remote signalling circuit includes logical Believe isolated power supply circuit, communications status amount Acquisition Circuit, signal of communication conditioning circuit, communications status amount indicating circuit；Communication every It is electrically connected and supplies from power circuit and communications status amount Acquisition Circuit, signal of communication conditioning circuit, communications status amount indicating circuit Electricity, remote signals conditioning circuit pass through conducting wire respectively and electrically connect with communications status amount Acquisition Circuit, communications status amount indicating circuit It connects.

7. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the telemetric circuit includes electricity Press Acquisition Circuit, current collection circuit；The acquisition of telemetric circuit progress voltage, the magnitude of current.

8. a kind of power remote distributed terminal according to claim 1, it is characterised in that: the CPU processing circuit packet Include CPU peripheral circuit, I/O port interlock circuit；CPU peripheral circuit includes crystal oscillating circuit, jtag circuit, electrification reset circuit, RTC Circuit and FLASH；Crystal oscillating circuit includes RTC crystal oscillator and the vibration of CPU1768 oikocryst, RTC crystal oscillator using no source crystal oscillator 32.768KHz, The vibration of CPU1768 oikocryst has source crystal oscillator using 12MHz.