CN202948551U - Data transmission device used in electric power information acquisition - Google Patents
Data transmission device used in electric power information acquisition Download PDFInfo
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- CN202948551U CN202948551U CN 201220596595 CN201220596595U CN202948551U CN 202948551 U CN202948551 U CN 202948551U CN 201220596595 CN201220596595 CN 201220596595 CN 201220596595 U CN201220596595 U CN 201220596595U CN 202948551 U CN202948551 U CN 202948551U
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Abstract
The utility model relates to a data transmission device used in electric power information acquisition. The data transmission device comprises a processor, wherein the processor is respectively connected with a power supply circuit, a GPRS (General Packet Radio Service) circuit, an Ethernet circuit, a serial port circuit, a hardware watchdog circuit and an external reset circuit; and the processor is responsible for protocol conversion of GPRS wireless data and serial port data, converts the wireless data received by the GPRS circuit into the serial port data, and communicates with a power distribution cabinet through the Ethernet circuit or a RS232 serial port circuit. The data transmission device communicates with a background server in a wireless connection manner, so that potential safety hazard to the project caused by wiring is reduced; the data transmission device transmits the information in the power distribution cabinet through various interfaces, such as the RS232 interface or the Ethernet; the anti-interference performance of the system is enhanced, and differential mode interference and common mode interference are suppressed better; thunder-proof design is used in the power supply part, and each data line is protected by a thermistor; the system has two functions of manual reset and automatic reset, so that the stability of the system is enhanced; and the thunder-proof design is used in the device, thus, the accident rate is lowered.
Description
Technical field
The utility model relates to a kind of device that carries out data transmission between GPRS and Ethernet, specifically a kind of data transmission device that is applied in the power information collection.
Background technology
Along with the development of Internet of Things and wireless technology, the Wireless Data Transmission business more and more is applied to various occasions.This business can be the virtual private data communication network that the user provide at a high speed, always online, transparent data transmits.All be widely used in departments such as Automation of Electric Systems, Industry Control, traffic administrations.
Power distribution cabinet is used in transformer station and is extensive, and quantity is very large.Various connection terminals, various analog and digital signal are arranged in power distribution cabinet.Because space in power distribution cabinet is limited, adopt wired mode to carry out data transmission, take up room in power distribution cabinet, and have hidden danger.The utility model study based on the GPRS wireless data transmission device, solved in power distribution cabinet the unsafe hidden danger of wiring, but also guaranteed the proper communication of data.
The utility model content
Be applied to the data transmission device of power information in gathering, major function is to receive the background server data command by the GPRS wireless network, then data is passed to relevant device in power distribution cabinet by Ethernet or RS232 serial ports.Whole data transmission procedure is safe and reliable, and equipment is set up retransmission mechanism, and undesirable if the data of transmission are interfered, data will be dropped, and again receives next bag partial data.
The technical scheme that the utility model adopts for achieving the above object is: be applied to the data transmission device in the power information collection, it is characterized in that comprising: processor, power circuit, GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit;
Processor is connected with power circuit, GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit respectively; Power circuit is connected with GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit.
Described power circuit comprises:
Power isolation circuit: will access the parallel circuit of electric capacity, voltage dependent resistor (VDR), transient diode and external power source between the input end of voltage transitions chip and earth terminal; The output voltage terminal of voltage transitions chip is connected with ground by capacitor C 3, transient diode D2 is in parallel with capacitor C 3, it is in parallel with transient diode D2 after transient diode D1 connects with transient diode D3, in parallel with capacitor C 3 after capacitor C 1 is connected with capacitor C 7, transient diode D1 is connected with the earth through resistance R 1 with the mid point that the mid point of transient diode D3 series connection is connected with capacitor C with capacitor C 7 is connected;
Low voltage conversion circuit: the input end of voltage transitions chip output voltage terminal access voltage transitions chip in power isolation circuit; The output terminal of voltage transitions chip connects the voltage isolating chip; Voltage transitions chip output voltage is to processor, ethernet circuit, hardware watchdog circuit and external reset circuit; The output terminal of described voltage isolating chip is powered to serial port circuit;
GPRS feed circuit: the input end of voltage transitions chip output voltage terminal access voltage transitions chip in power isolation circuit; This chip enable termination is received the control signal of processor, and output voltage is to the GPRS circuit supply.
Described GPRS circuit adopts close pin plug-in unit, and this close pin plug-in unit is connected with the data pin of sending out/receive of processor; The card power supply end is connected with the output terminal of voltage transitions chip in the GPRS feed circuit; Each pin of plug-in unit is connected with I/O, clock, the reset pin of SIM card respectively; The I/O of SIM card, clock, reset pin are connected with 3 input ends of protection chip respectively.
Described ethernet circuit adopts Ethernet chip, and the power end of this chip is connected with the output terminal of voltage transitions chip in low voltage conversion circuit; The sheet choosing of this chip input end receiving processor, clock, interruption, interrupt output, data input, data output signal; The LED output terminal is connected with network interface LED end; The differential data transmission interface positive and negative terminal of network interface respectively after series thermal-sensitive resistance, be connected with the data transmission interface of Ethernet chip, also be connected with the air discharge tube of two series connection and the parallel circuit of an air discharge tube between this positive and negative terminal, the neutral earthing of the air discharge tube of described two series connection; The differential data receiving interface positive and negative terminal of network interface respectively after series thermal-sensitive resistance, be connected with the data receiver interface of Ethernet chip, also be connected with the air discharge tube of two series connection and the parallel circuit of an air discharge tube between this positive and negative terminal, the neutral earthing of the air discharge tube of described two series connection; The end that described series thermal-sensitive resistance is connected with ethernet circuit also connects electrostatic prevention diode protection chip;
Described network interface differential data transmission interface is connected with the differential data receiving interface and is connected pull-up resistor, the magnetic bead of wherein connecting again after the pull-up resistor parallel connection of network interface differential data receiving interface positive and negative terminal.
Described network interface is built-in with network transformer; Be connected with the interface of power distribution cabinet by netting twine.
Described serial port circuit adopts isolating chip, is connected with the parallel circuit of two Transient Suppression Diode D4, D6 that connect and a Transient Suppression Diode D5 between the data sending terminal of this chip and data receiver, the neutral earthing of D4, D6 connection; The data sending terminal of this chip also is connected with the interface of power distribution cabinet by series thermal-sensitive resistance PPTC1, PPTC2 respectively with data receiver; Also be connected with air discharge tube GDT1, the GDT3 of two series connection and the parallel circuit of a Transient Suppression Diode GDT2, the neutral earthing that GDT1, GDT3 connect between described PPTC1, PPTC2 and two ends that the power distribution cabinet interface is connected.
Described hardware watchdog circuit adopts watchdog chip, and this chip output reset signal is to the reset terminal of processor.
The utlity model has following beneficial effect and advantage:
1. communicate by letter with background server and adopt the wireless connections mode, reduce the potential safety hazard that wiring brings to engineering.
With power distribution cabinet in the transmission of information adopt multiple interfaces: RS232 and Ethernet.
3. insulating power supply is adopted in the power supply input, strengthens the anti-interference of system.Adopt the SMBJ12CA diode between power lead, well suppressed differential mode and common mode interference.
4. power unit adopts the anti-lightning design, and each data line has the thermistor protection.
5. system has hand-reset and the two kinds of functions that automatically reset, and when system's operation exception or program fleet, can system be resumed operation, and has strengthened Systems balanth.
6. because this device adopts transmission of wireless signals, reduced the potential safety hazard that in the power distribution cabinet, wiring brings, device adopts the anti-lightning design, has reduced the generation of accident rate.
Description of drawings
Fig. 1 is system chart of the present utility model;
Fig. 2 is schematic diagram block diagram of the present utility model;
Fig. 3 is input power schematic diagram of the present utility model;
Fig. 4 is GPRS power principle figure of the present utility model;
Fig. 5 is low voltage transition schematic diagram of the present utility model;
Fig. 6 is Ethernet control circuit schematic diagram of the present utility model;
Fig. 7 is serial ports 232 circuit theory diagrams of the present utility model;
Fig. 8 is GPRS module interface circuit schematic diagram of the present utility model;
Fig. 9 is hardware circuit house dog schematic diagram of the present utility model;
Figure 10 is system reset circuit schematic diagram of the present utility model;
Figure 11 is system processor pinouts of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The utility model is used for the data transmission of power distribution cabinet semaphore, the information exchange in power distribution cabinet is crossed Ethernet or the RS232 serial ports is communicated by letter with background server with GPRS.
Wide voltage insulating power supply input: input power adopts DC5～36V input, and in device power supply (DPS) and power distribution cabinet, power supply is isolated.This installation's power source has lightning protection, can effectively avoid 10KV thunderbolt voltage.
The central processing unit circuit: it is the platform of GPRS wireless data and serial data protocol conversion that this partial circuit is responsible for, and the GPRS wireless data becomes serial data to be delivered in power distribution cabinet data-switching by central processing unit.
The GPRS radio communication circuit: this partial circuit is mainly to be responsible for the data wireless transmission.
Datel circuit: this part mainly is made of Ethernet and RS232 serial ports.Can be according to actual needs in power distribution cabinet, thus to select be the sort of interface mode.
Safety protection circuit is comprised of two parts, and a part is that manual system resets; Another part is that hardware watchdog resets.Hand-reset is to occur extremely when hope, and hand push button carries out system reset.It is that system program appearance race flies or extremely, system itself resets oneself that hardware watchdog resets.
The utility model is a kind of data transmission device based on GPRS wireless technology and serial port communication technology, and this device comprises following a few partial circuit: power circuit, indicator light circuit, Ethernet control circuit, RS232 serial port circuit, GPRS module interface circuit, hardware watchdog circuit and system reset circuit.
As shown in Figure 1, be applied to the system chart of the data transmission device in the power information collection.Whole system is made of terminal acquisition, GPRS wireless network and background server etc.Terminal acquisition (in the present embodiment for data transmission device of the present utility model) mainly communicates by Ethernet or RS232 serial ports and power distribution cabinet, the information spinner that gathers will comprise voltage, electric current and some switching value control informations, then the information exchange that collects is crossed the GPRS wireless network transmissions to background server, background server is gathering, is processing the information that collects, form word, image, then backup to background data base.It is that the signals collecting amount arrives GPRS wireless transmission part that the utility model is mainly completed, and the below is described in detail with the load overcurrent protection.
Communication interface is selected: communicate by letter with power distribution cabinet and adopt Ethernet or RS232 interface, communicate by letter with background server and adopt the GPRS wireless network.
As shown in Figure 2, processor is connected with power circuit, GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit respectively; Be responsible for the protocol conversion of GPRS wireless data and serial data, and convert the wireless data of GPRS circuit reception to serial data, communicate by letter with power distribution cabinet through Ethernet or RS232 circuit.Wherein, indicator light circuit comprises a plurality of LED lamps, is powered by power circuit.
Certain cable hinders for some reason and causes electric current excessive in power distribution cabinet, in power distribution cabinet, sensor produces alerting signal, signal passes to processor STM32F103C8T6 by Ethernet interface HR911105A and Ethernet chip ENC28J60 with data, processor is repacked encapsulation with data, carry out serial communication with the GPRS module, by the GPRS wireless network, data are passed to the background service center.After the backstage receives data, data are carried out analyzing and processing, judging is the fault of certain circuit, thereby produce the control alerting signal corresponding to certain circuit, control alerting signal equally by the GPRS wireless network, GPRS wireless module in data transmission device is crossed serial port pin 15 with information exchange and pin one 7 passes to processor after receiving information, processor is unpacked these data again, package passes to power distribution cabinet by Ethernet.Power distribution cabinet carries out the corresponding operation of processing after receiving information.Complete the task of a data transfer.
As shown in Figure 3, native system adopts direct current 5V to power to 36V, and external power source and internal electric source carry out isolation processing, thereby has better reduced the impact of external noise on system.Power unit safety capacitor C 1 in parallel, C3, C7, C8 effectively suppress thunderbolt and disturb; Parallel diode TVS-SMBJ48A also.The common and different mode that D1, D2, three TVS diodes of D3 (TVS-SMBJ12CA) are effectively eliminated power end disturbs.System power supply input end RL1206A600K voltage dependent resistor (VDR) in parallel has good protective effect to the power supply of system.As shown in Figure 4, for reducing system power dissipation and improving Systems balanth, outside controlled MIC29302WU is adopted in the GPRS power supply, for module provides+the 4V power supply.When occurring extremely need to restarting without GPRS module or module, can carry out switch to the pin one of MIC29302WU by an I/O mouth line and control.Shown in Figure 5, processor part and ethernet segment are powered by AMS1117-3.3V.Because serial ports RS232 communications portion need to be isolated from the outside, so insulating power supply B0303XT-W2 is adopted in power supply.
As shown in Figure 6, ethernet segment is made of master chip ENC28J60, he and processor adopting SPI interface communication, reduced greatly the complicacy of its peripheral circuit, adopt HR911105A with external interface, network transformer is built in HR911105A inside, and level of integrated system is improved greatly.The network differential data line adopts air discharge tube GDT4, GDT5, GDT6, GDT7, GDT8, GDT9, and thermistor PPTC3, PPTC4, PPTC5, PPTC6 and electrostatic prevention diode protection SLVU2.8-4 have strengthened the stability that system uses in industry spot.Have on every data line a precision be 1% 49.9 ohm on draw build-out resistor, wherein the differential data receiving port also is connected to the magnetic bead of 100 ohm on the top of pull-up resistor, seals in data line to reduce power supply noise, affects communication efficiency.
As shown in Figure 7, the ADM3251EARWZ that the RS232 serial ports partly adopts AD company to produce, it has the effect of input and outputting data signals isolation, and air discharge tube GDT1, GDT2, GDT3 have been adopted on data line, thermistor PPTC1, PPTC2 and Transient Suppression Diode (TVS-SMBJ12CA) D4, D5, D6.These can be good at suppressing outside interference to system.
As shown in Figure 8, the GPRS module adopts the MC52iR3 of Siemens Company, the embedded TCP of this module IP stack, working temperature is wide, is connected with the close pin plug-in unit of data transmission device by 50 pins.All be connected with ESDA6V1W5 on every data line, ESDA6V1W5 has the effect of electrostatic prevention.
As shown in Figure 9, hardware watchdog circuit adopts chip MAX813LESA, 1.6 input once greater than the low level of 50 millisecond to house dog pin 6 with interior pin by processor second, guarantees that MAX813LESA chip pin 8 is not to processor reset pin output low level.
As shown in figure 10, manual reset circuit, S1 controls by hand push button, manually presses S1 when system's operation exception, and system can reset automatically.
As shown in figure 11, processor circuit, the STM32F103C8T6 that processor adopting ST company produces.Main being responsible for receives RS232 serial ports or the data of Ethernet, and it is carried out data-switching, by GPRS, the data of conversion sent.Program exception appears in processor, can operate on it by hardware watchdog or hand-reset, makes it get back to original state.
Claims (8)
1. be applied to the data transmission device in the power information collection, it is characterized in that comprising: processor, power circuit, GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit; Processor is connected with power circuit, GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit respectively; Power circuit is connected with GPRS circuit, ethernet circuit, serial port circuit, hardware watchdog circuit and external reset circuit.
2. the data transmission device of power information in gathering that be applied to according to claim 1, it is characterized in that: described power circuit comprises:
Power isolation circuit: will access the parallel circuit of electric capacity, voltage dependent resistor (VDR), transient diode and external power source between the input end of voltage transitions chip and earth terminal; The output voltage terminal of voltage transitions chip is connected with ground by capacitor C 3, transient diode D2 is in parallel with capacitor C 3, it is in parallel with transient diode D2 after transient diode D1 connects with transient diode D3, in parallel with capacitor C 3 after capacitor C 1 is connected with capacitor C 7, transient diode D1 is connected with the earth through resistance R 1 with the mid point that the mid point of transient diode D3 series connection is connected with capacitor C with capacitor C 7 is connected;
Low voltage conversion circuit: the input end of voltage transitions chip output voltage terminal access voltage transitions chip in power isolation circuit; The output terminal of voltage transitions chip connects the voltage isolating chip; Voltage transitions chip output voltage is to processor, ethernet circuit, hardware watchdog circuit and external reset circuit; The output terminal of described voltage isolating chip is powered to serial port circuit;
GPRS feed circuit: the input end of voltage transitions chip output voltage terminal access voltage transitions chip in power isolation circuit; This chip enable termination is received the control signal of processor, and output voltage is to the GPRS circuit supply.
3. the data transmission device of power information in gathering that be applied to according to claim 1, it is characterized in that: described GPRS circuit adopts close pin plug-in unit, and the sending out of this close pin plug-in unit and processor/receipts data pin is connected; The card power supply end is connected with the output terminal of voltage transitions chip in the GPRS feed circuit; Each pin of plug-in unit is connected with I/O, clock, the reset pin of SIM card respectively; The I/O of SIM card, clock, reset pin are connected with 3 input ends of protection chip respectively.
4. the data transmission device of power information in gathering that be applied to according to claim 1, it is characterized in that: described ethernet circuit adopts Ethernet chip, and the power end of this chip is connected with the output terminal of voltage transitions chip in low voltage conversion circuit; The sheet choosing of this chip input end receiving processor, clock, interruption, interrupt output, data input, data output signal; The LED output terminal is connected with network interface LED end; The differential data transmission interface positive and negative terminal of network interface respectively after series thermal-sensitive resistance, be connected with the data transmission interface of Ethernet chip, also be connected with the air discharge tube of two series connection and the parallel circuit of an air discharge tube between this positive and negative terminal, the neutral earthing of the air discharge tube of described two series connection; The differential data receiving interface positive and negative terminal of network interface respectively after series thermal-sensitive resistance, be connected with the data receiver interface of Ethernet chip, also be connected with the air discharge tube of two series connection and the parallel circuit of an air discharge tube between this positive and negative terminal, the neutral earthing of the air discharge tube of described two series connection; The end that described series thermal-sensitive resistance is connected with ethernet circuit also connects electrostatic prevention diode protection chip.
5. the data transmission device of power information in gathering that be applied to according to claim 4, it is characterized in that: described network interface differential data transmission interface is connected with the differential data receiving interface and is connected pull-up resistor, the magnetic bead of wherein connecting again after the pull-up resistor parallel connection of network interface differential data receiving interface positive and negative terminal.
6. the data transmission device of power information in gathering that be applied to according to claim 4, it is characterized in that: described network interface is built-in with network transformer; Be connected with the interface of power distribution cabinet by netting twine.
7. the data transmission device of power information in gathering that be applied to according to claim 1, it is characterized in that: described serial port circuit adopts isolating chip, be connected with the parallel circuit of two Transient Suppression Diode D4, D6 that connect and a Transient Suppression Diode D5 between the data sending terminal of this chip and data receiver, the neutral earthing that D4, D6 connect; The data sending terminal of this chip also is connected with the interface of power distribution cabinet by series thermal-sensitive resistance PPTC1, PPTC2 respectively with data receiver; Also be connected with air discharge tube GDT1, the GDT3 of two series connection and the parallel circuit of a Transient Suppression Diode GDT2, the neutral earthing that GDT1, GDT3 connect between described PPTC1, PPTC2 and two ends that the power distribution cabinet interface is connected.
8. the data transmission device of power information in gathering that be applied to according to claim 1, it is characterized in that: described hardware watchdog circuit adopts watchdog chip, and this chip output reset signal is to the reset terminal of processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220596595 CN202948551U (en) | 2012-11-13 | 2012-11-13 | Data transmission device used in electric power information acquisition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220596595 CN202948551U (en) | 2012-11-13 | 2012-11-13 | Data transmission device used in electric power information acquisition |
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| CN 201220596595 Expired - Lifetime CN202948551U (en) | 2012-11-13 | 2012-11-13 | Data transmission device used in electric power information acquisition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561251A (en) * | 2013-11-21 | 2014-02-05 | 国网安徽省电力公司淮南供电公司 | Image collecting circuit of power collecting and metering device |
| CN103762577A (en) * | 2014-02-14 | 2014-04-30 | 国网山东齐河县供电公司 | Communication line thunder prevention device |
| CN104460661A (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Remote debugging system capable of conducting remote outage resetting and remote monitoring |
| CN108737910A (en) * | 2018-04-12 | 2018-11-02 | 贵州航天天马机电科技有限公司 | A kind of wireless communication system interface processor |
| CN113992477A (en) * | 2020-12-11 | 2022-01-28 | 东莞汉宇自动化科技有限公司 | Control circuit of intelligent gateway |
| CN115183751A (en) * | 2022-07-12 | 2022-10-14 | 中煤科工集团西安研究院有限公司 | Hydrological telemetering device based on dual-channel network communication and data transmission method |
-
2012
- 2012-11-13 CN CN 201220596595 patent/CN202948551U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561251A (en) * | 2013-11-21 | 2014-02-05 | 国网安徽省电力公司淮南供电公司 | Image collecting circuit of power collecting and metering device |
| CN103561251B (en) * | 2013-11-21 | 2017-06-16 | 国网安徽省电力公司淮南供电公司 | The image acquisition circuit of electric power acquisition and measuring equipment |
| CN103762577A (en) * | 2014-02-14 | 2014-04-30 | 国网山东齐河县供电公司 | Communication line thunder prevention device |
| CN104460661A (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Remote debugging system capable of conducting remote outage resetting and remote monitoring |
| CN104460661B (en) * | 2014-12-05 | 2017-12-12 | 国家电网公司 | The remote debugging system of long-range turn-off reset and remote monitoring can be carried out |
| CN108737910A (en) * | 2018-04-12 | 2018-11-02 | 贵州航天天马机电科技有限公司 | A kind of wireless communication system interface processor |
| CN108737910B (en) * | 2018-04-12 | 2024-01-26 | 贵州航天天马机电科技有限公司 | Interface processor of wireless communication system |
| CN113992477A (en) * | 2020-12-11 | 2022-01-28 | 东莞汉宇自动化科技有限公司 | Control circuit of intelligent gateway |
| CN115183751A (en) * | 2022-07-12 | 2022-10-14 | 中煤科工集团西安研究院有限公司 | Hydrological telemetering device based on dual-channel network communication and data transmission method |
| CN115183751B (en) * | 2022-07-12 | 2024-04-12 | 中煤科工集团西安研究院有限公司 | Hydrological telemetering device and data transmission method based on double-channel network communication |
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