CN103532202A - Charging piles for wireless carrier dual-network complementation of public communities and application method thereof - Google Patents

Abstract

The invention discloses charging piles for wireless carrier dual-network complementation of public communities and the application method thereof. The charging piles comprise main control boards, opening-in and opening-out processing modules, measurement processing modules, printing modules, intelligent electric meters, keyboards, CAN data interfaces, intelligent card reading-writing modules, cameras, LED display screens and communication modules. The application method solves the problem that the large scale of charging piles are accessed in an electric vehicle background in the public communities. Through the application method, the data interaction can be implemented between the charging piles and the electric vehicle background through two free communication methods of radios and carriers, so that the expensive communication cost is reduced, and the influence to the communication quality from peripheral interference sources or other same-frequency-band wireless signals is effectively avoided.

Description

Wireless carrier dual-network complementary charging pile and application method for public quarters

technical field

The invention belongs to the field of electric vehicle management, and in particular relates to a wireless carrier dual-network complementary charging pile and an application method for a public community.

Background technique

With the support of new energy policies, it is estimated that the demand for new energy vehicles in my country will reach 977,000 in 2015, with an average annual growth rate of 216%. The State Grid Corporation plans to build 1,700 charging stations before 2015, and by 2015, China will have built 2,000 charging stations and 400,000 charging piles. Electric vehicle charging piles are divided into charging piles inside the charging station and discrete piles outside the station, especially the discrete charging piles outside the station, which have a scattered geographical layout and a large number. As electric vehicles enter residents' homes, there will be more and more charging piles in residential areas. At present, the management of such discrete charging piles by the electric vehicle operation and management department is mainly realized through GPRS channels. Although GPRS channels are relatively stable, this This method will lead to an increase in the cost of communication.

Chinese patent 201020202583.3 discloses an electric vehicle charging pile with a wireless monitoring system, which realizes the communication between the discrete charging pile and the background management system through GPRS, CDMA or 3G modules. This patent uses a public mobile network for data transmission, and each charging pile needs to be equipped with a GPRS/CDMA/3G communication module, which increases the communication cost of the system.

Chinese patent 201210013267.5 discloses a wireless collection system for charging piles and its communication method. Chinese patent 201120174600.1 discloses a charging pile for electric vehicles with a wireless monitoring terminal. The above two patents are realized through 802.11n/WIFI technology In addition to the wireless data collection of charging piles, this technology requires the cooperation of WIFI routers to complete data communication. At present, there are two disadvantages in using WIFI technology to manage charging piles: one is that it cannot relay routing, and data communication can only be realized within the signal coverage of the router, and the distance is only about tens to one hundred meters; the other is due to the equipment performance of the router itself. And bandwidth limitations, generally only a dozen WIFI terminals can be connected, which cannot meet the needs of practical applications.

Chinese patent 201210085959.0 discloses a data acquisition system for discrete charging piles of electric vehicles, which establishes a Zigbee network through the Zigbee main module and sub-modules installed on the discrete charging piles to realize data communication. However, the transmission distance of Zigbee technology is only 10 to 100 meters, and when wireless interference occurs around, Zigbee communication will be greatly affected.

Chinese patent 201110071414.X discloses an electric vehicle automatic charging device and method using power line carrier communication, and realizes data transmission to the electric vehicle automatic charging device through the power line carrier communication technology. Although this invention can solve the problem of limited signal coverage, for public cells, due to the use of various electrical and electronic equipment, there are various harmonics and disturbances in the power line, which leads to increased bit errors in the power carrier signal and affects the communication quality. great influence.

Although the above existing technologies have achieved certain results, there are disadvantages such as short transmission distance, a small number of charging piles that the system can connect to, normal communication outside the signal coverage area, inability to cope with wireless signal interference, and inability to avoid line interference, etc., which cannot meet the needs of electric vehicles. The need for charging pile management during large-scale promotion.

Contents of the invention

The purpose of the present invention is to solve the above problems by providing a wireless carrier dual-network complementary charging pile for public communities and its application method to solve the problem of large-scale charging piles connected to the backstage of electric vehicles in public communities. Through this invention, the charging pile can exchange data with the background of the electric vehicle through two free communication means of wireless and carrier, which reduces high communication costs and effectively avoids the influence of surrounding interference sources or other wireless signals in the same frequency band on communication quality.

To achieve the above object, the technical scheme of the present invention is as follows:

A wireless carrier dual-network complementary charging pile for a public community, including a main control board, an input and output processing module, a measurement processing module, a printing module, a smart meter, a keyboard, a CAN data interface, a smart card reading and writing module, Camera, LED display and communication module.

The main control board is used to connect the input and output processing module, the measurement processing module, the printing module, the smart meter, the keyboard, the CAN data interface, the smart card reading and writing module, the camera, the LED display and the communication module, so as to realize splitting Input and output modules, measurement processing modules, smart meters, keyboards, smart card reading and writing modules, and camera data collection, control the input and output processing modules, printing modules, and LED display screens, and communicate with other The data interaction of the CAN bus device realizes the data transmission with other charging piles and the centralized data management unit of the community through the communication module. .

The input and output processing module is connected to the power switch, collects the state of the power switch and controls the power switch to switch on and off; the measurement processing module is connected to the mutual induction module, and collects the data of the mutual induction module; the printing module completes the printing of the charging bill Function; the smart meter completes the metering function of charging power; the keyboard receives instructions issued by the user; the CAN data interface is connected to the BMS to obtain measurement data in the BMS; the smart card read-write module performs smart charging card reading and writing; the camera completes the monitoring of the charging process and charging personnel.

The communication module is connected to the main control board, sends out data in response to the instructions of the main control board, and returns the received data to the main control board. .

As a further improvement of the present invention, the communication module includes a micro-processing module, a micro-power wireless module, a carrier communication module, and a filtering module.

The micro-processing module is connected to the micro-power wireless module, the carrier communication module and the main control board, and performs communication link management, communication data transmission, and verification work. In response to the instructions of the main control board, send communication instructions and data to the micro-power wireless module and the carrier communication module, and receive the data of the micro-power wireless module and the carrier communication module at the same time, perform comparison and verification, and transfer the verified data to main control board.

Under normal circumstances, the micro-processing module mainly communicates with the micro-power wireless module, and the data of the carrier communication module is used as backup data and verification. When there is interference or other factors in the surroundings, resulting in the failure of normal data transmission through the micro-power wireless module, the communication module will switch to the carrier communication module for data interaction until the micro-power wireless module resumes normal communication.

The micro-power wireless module is connected with the micro-processing module, and uses micro-power wireless to complete the data transmission between the charging pile and other charging piles and the centralized data management unit of the community.

The micro-power wireless module adopts the 470mHz-490mHz wireless working frequency required by the National Radio Commission, adopts the forward error correction channel coding technology, the air transmission rate can reach 100Kbps, and the reliable transmission distance in open areas can reach 1500 meters.

The micro-power wireless module supports wireless ad-hoc network, and can complete the communication network organization of all charging piles in the public area without manual intervention.

The micro-power wireless modules can perform data interaction between two pairs and support data transmission, so as to realize multi-level relay of data, and can transmit data to the final destination through level-by-level transmission.

The micro-power wireless module can realize the function of automatic frequency hopping in the wireless frequency band. When there are micro-power wireless signals from charging piles in other communities around the public community, the micro-power wireless module can change the communication frequency through the automatic frequency hopping function to avoid communication with other communities. Collision of cell wireless signals.

The micro-power wireless module can realize automatic adjustment within the power allowable range. When the wireless signal with other surrounding micro-power wireless modules is weak, it will automatically increase the transmission power, strengthen the signal, and provide communication reliability; when communicating with other surrounding micro-power wireless modules When the wireless signal between the micro-power wireless modules is strong, the transmission power is automatically reduced under the premise of ensuring the communication success rate to reduce power consumption.

The carrier communication module is connected with the micro-processing module and the filtering module, accepts the instructions of the micro-processing module and returns the received data to the micro-processing module;

The filter module is connected with the carrier communication module, and is used to filter the interference signal in the carrier communication.

The filter module includes a sending active filter, a sending passive filter, and a receiving passive filter. When data is sent, the active filter completes the active filtering and power amplifier amplification of the communication signal, and then couples through the sending passive filter To the power line for signal transmission; when data is received, the communication signal is sent to the microprocessor for processing after passing through the receiving passive filter.

The application method of the wireless carrier dual-network complementary charging pile used in the public area includes the following steps:

Step 1: After the charging pile is installed, start the charging pile, let the charging pile communication module work, carry out the self-organizing network of the micro-power wireless module and the carrier module, establish the communication route from each charging pile to the centralized data management unit of the community, and record the communication route communication quality. After the networking is completed, debug the charging piles that have not been successfully connected to the network.

Step 2: When the charging pile interacts with the data centralized management unit of the community, the communication module in the charging pile first distributes the data to the micro-power wireless module and the carrier module, and sends the data to the centralized data management unit of the community through both wireless and carrier data.

Step 3: When communicating in wireless mode, the communication module communicates according to the optimal communication route recorded in the memory to reach the centralized management unit of the community data. If the communication fails, the suboptimal communication route is selected in turn, and according to the usage of the communication route this time, Adjust the success rate of each communication route in memory. If it fails continuously, temporarily give up the wireless communication method.

Step 4: The charging pile communication module simultaneously receives data from micro-power wireless and carrier wave, and compares and verifies the data, with micro-power wireless data as the main and carrier data as the supplement. If the micropower wireless data is not received within the specified time, the carrier data is taken for subsequent analysis.

Step 5: If there is a charging pile whose micro-power wireless signal cannot be connected to the Internet, start the self-organizing network function regularly to re-establish a wireless communication route for the charging pile.

Beneficial effects of the present invention:

1) Micro-power wireless modules are used for communication in the charging pile, which reduces the communication fee of each charging pile, saves the communication expenses in the entire electric vehicle operation network, and reduces the communication directly connected to the background of the electric vehicle operation management system link, which improves the running speed of the system background.

2) The micro-power wireless signal covers a wide range, has an automatic frequency hopping function, and can adjust the transmission power according to the quality of the communication signal, with strong adaptability and high signal stability. The carrier channel adds a filter module, which reduces the interference in the power line, enhances the anti-interference ability of the carrier signal, and reduces the bit error rate of the signal.

3) The micro-power wireless and carrier dual channels work at the same time, and they are mutually verified, which ensures the communication reliability of the charging pile and improves the communication accuracy.

4) The charging pile uses micro-power wireless and carrier dual-channel, modular application, does not require the laying of communication lines, is convenient for installation and debugging, reduces the workload of thread debugging, and is conducive to the promotion and promotion of charging piles in residential areas, public parking lots and other places. application.

Description of drawings

Fig. 1 is the structure diagram of the wireless carrier dual-network complementary charging pile for the public cell of the present invention;

Fig. 2 is a structural diagram of the charging pile communication module of the present invention;

Fig. 3 is a filter module structural diagram of the present invention;

Fig. 4 is a flow chart of the charging pile application method for the wireless carrier dual-network complementation of the public cell according to the present invention;

Fig. 5 is a schematic diagram of a wireless carrier dual-network complementary charging pile network for a public cell according to the present invention;

Among them: 100, charging pile; 101, main control board; 102, input and output processing module; 103, measurement processing module; 104, printing module; 105, smart meter; 106, keyboard; 107, CAN data interface; 108 , smart card reading and writing module; 109, camera; 110, LED display; 200, communication module; 201, micro-processing module; 202, micro-power wireless module; 203, carrier communication module; filter; 302, a transmitting passive filter; 303, a receiving passive filter; 400, a centralized management unit for cell data.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a wireless carrier dual-network complementary charging pile for a public community includes a main control board 101, an input and output processing module 102, a measurement processing module 103, a printing module 104, a smart meter 105, Keyboard 106 , CAN data interface 107 , smart card read-write module 108 , camera 109 , LED display 110 and communication module 200 .

The main control board 101 is used to connect the input and output processing module 102, the measurement processing module 103, the printing module 104, the smart meter 105, the keyboard 106, the CAN data interface 107, the smart card reading and writing module 108, the camera 109, the LED The display screen 110 and the communication module 200 realize the data collection of the input and output module 102, the measurement processing module 103, the smart meter 105, the keyboard 106, the smart card reading and writing module 108, and the camera 109, and the input and output processing module 102 , the printing module 104, the control of the LED display screen 110, and realize the data interaction with other CAN bus devices through the CAN data interface 107, and realize the data transfer between other charging piles 100 and the community data centralized management unit 400 through the communication module 200 . .

The input and output processing module 102 is connected with the power switch, collects the state of the power switch and controls the power switch to switch on and off; the measurement processing module 103 is connected with the mutual induction module, and collects the data of the mutual induction module; the printing module 104 completes charging The printing function of bills; the smart meter 105 completes the metering function of the charging power; the keyboard 106 receives the instructions issued by the user; the CAN data interface 107 is connected with the BMS to obtain the measurement data in the BMS; the smart card reads The writing module 108 reads and writes the smart charging card; the camera 109 monitors the charging process and charging personnel.

The communication module 200 is connected to the main control board 101 , sends out data in response to the instruction of the main control board 101 , and returns the received data to the main control board 101 .

As shown in FIG. 2 , the communication module 200 includes a micro-processing module 201 , a micro-power wireless module 202 , a carrier communication module 203 , and a filtering module 204 . The micro-processing module 201 is connected to the micro-power wireless module 202, the carrier communication module 203 and the main control board 101 to perform communication link management, communication data transmission, and verification work. In response to the instructions of the main control board 101, send communication instructions and data to the micro-power wireless module 202 and the carrier communication module 203, and simultaneously receive and receive the data of the micro-power wireless module 202 and the carrier communication module 203, compare and verify, and After verification, the data is transferred to the main control board 101. Under normal circumstances, the micro-processing module 201 mainly communicates with the micro-power wireless module 202, and the data of the carrier communication module 203 is used as backup data and verification. When there is interference or other factors around, resulting in the failure of normal data transmission through the micro-power wireless module 202, the communication module 200 will switch to the carrier communication module 203 for data interaction until the micro-power wireless module 202 resumes normal communication.

The micro-power wireless module 202 is connected with the micro-processing module 201 and uses a micro-power wireless method to complete the data transfer between the charging pile 100 and other charging piles 100 and the centralized management unit 400 for community data.

The micro-power wireless module 202 adopts the 470mHz-490mHz wireless working frequency required by the National Radio Commission, adopts the forward error correction channel coding technology, the air transmission rate can reach 100Kbps, and the reliable transmission distance in open areas can reach 1500 meters.

The micro-power wireless module 202 supports wireless ad-hoc network, and can complete the communication network organization of all charging piles in the public community without manual intervention.

The micro-power wireless modules 202 can perform data interaction between two pairs, and support data transmission, so as to realize multi-level data relay, and can transmit data to the final destination through level-by-level transmission.

The micro-power wireless module 202 can realize the function of automatic frequency hopping in the wireless frequency band. When there are micro-power wireless signals from charging piles in other communities around the public community, the micro-power wireless module 202 can use the automatic frequency hopping function to change the communication frequency to avoid Collision with radio signals from other cells.

The micro-power wireless module 202 can realize automatic adjustment within the power allowable range, and when the wireless signal with other surrounding micro-power wireless modules 202 is weak, it will automatically increase the transmission power, strengthen the signal, and provide communication reliability; When the wireless signals between other micro-power wireless modules around are strong, the transmission power is automatically reduced to reduce power consumption under the premise of ensuring the communication success rate.

The carrier communication module 203 is connected with the microprocessing module 201 and the filtering module 204, accepts the instruction of the microprocessing module 201 and returns the received data to the microprocessing module 201;

The filter module 204 is connected with the carrier communication module 203, and is used for filtering the interference signal in the carrier communication.

As shown in Figure 3, the filter module 204 is composed of a transmitting active filter 301, a transmitting passive filter 302, and a receiving passive filter 303. When data is transmitted, the active filter 301 completes the active filtering of the communication signal and power amplifier, and then coupled to the power line through the transmitting passive filter 302 for signal transmission; when data is received, the communication signal is sent to the microprocessor for processing after passing through the receiving passive filter 303.

The input and output processing module 102 is connected with the power switch, collects the state of the power switch and controls the power switch to switch on and off; the measurement processing module 103 is connected with the mutual induction module, and collects the data of the mutual induction module; the printing module 104 completes charging The printing function of bills; the smart meter 105 completes the metering function of the charging power; the keyboard 106 receives the instructions issued by the user; the CAN data interface 107 is connected with the BMS to obtain the measurement data in the BMS; the smart card reads The writing module 108 reads and writes the smart charging card; the camera 109 monitors the charging process and charging personnel.

As shown in Figure 4, after the charging pile 100 is installed, the staff will start the charging pile 100, let the communication module 200 work, carry out the self-organizing network of the micro-power wireless module 202 and the carrier module 203, and establish centralized management of data from each charging pile 100 to the community The communication route of the unit 400, and record the communication quality of the communication route. After the networking is completed, the charging pile 100 that has not been successfully connected to the network is debugged. When the charging pile 100 interacts with the data centralized management unit 400 of the community, the communication module 200 first distributes the data to the micro-power wireless module 202 and the carrier module 203, and sends the data to the centralized data management unit 400 of the community through both wireless and carrier. data. When communicating in a wireless manner, the communication module 200 communicates according to the optimal communication route recorded in the internal memory to reach the residential area data centralized management unit 400. If the communication fails, the sub-optimal communication route is selected in turn, and according to the use of the current communication route, adjust The success rate of each communication route in memory. If it fails continuously, temporarily give up the wireless communication method. The communication module 200 simultaneously receives data from two modes of micro-power wireless and carrier, and compares and verifies the data, with micro-power wireless data as the main and carrier data as the supplement. If the micropower wireless data is not received within the specified time, the carrier data is taken for subsequent analysis. If there is a charging pile 100 whose micropower wireless signal cannot be connected to the Internet, the self-organizing network function is activated periodically to re-establish a wireless communication route for the charging pile 100 .

As shown in Figure 5, one community data centralized management unit 400 can manage thousands of charging piles 100 at the same time, and for the charging piles 100 directly covered by the micropower wireless signal of the community data centralized management unit 400, the community data centralized management unit 400 can communicate with The charging pile 100 communicates directly; for the charging pile 100 that cannot be directly covered by the micro-power wireless signal of the community data centralized management unit 400, it can be transferred through other charging piles 100 to realize data interaction with the community data centralized management unit 400, and the number of transfer hops can be More than 10 times, so as to meet the communication coverage of a large public cell or area (such as a radius greater than 2km).

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (10)

1. for the wireless carrier pair of common cell, net complementary charging pile, it is characterized in that, comprise master control borad, input and output processing module, measure processing module, print module, intelligent electric meter, keyboard, CAN data-interface, smart card module for reading and writing, camera, LED display and communication module;

Described master control borad, be used for connecting input and output processing module, measure processing module, print module, intelligent electric meter, keyboard, CAN data-interface, smart card module for reading and writing, camera, LED display and communication module, realization is to input and output module, measure processing module, intelligent electric meter, keyboard, smart card module for reading and writing, the data acquisition of camera, to input and output processing module, print module, the control of LED display, and the data interaction with other CAN bus apparatus by the realization of CAN data-interface, by communication module realize and other charging pile and cell data centralized management unit between data transmit,

Described input and output processing module is connected with mains switch, gathers switching-on and switching-off state and controls mains switch and carry out deciliter; Described measurement processing module is connected with mutual inductance module, gathers mutual inductance module data; Described print module completes the printing function of charging bill; Described intelligent electric meter completes the function of measuring to charge capacity; Described keyboard receives the instruction that user issues; Described CAN data-interface is connected with BMS, obtains the measurement data in BMS; Described smart card module for reading and writing carries out the read-write of intelligent charge card; Described camera completes the monitoring to charging process and charging personnel;

Described communication module connects master control borad, for completing the data transmission between charging pile and other charging pile and cell data centralized management unit.

2. the complementary charging pile of the two nets of the wireless carrier for common cell as claimed in claim 1, is characterized in that, described communication module comprises micro treatment module, micro power radio module, carrier communication module, filtration module;

The instruction of micro treatment module response master control borad, to micro power radio module and carrier communication module, issue communication instruction and data, and receive the data of micro power radio module and carrier communication module simultaneously, compare and verification, by data transfer after verification to master control borad;

Described micro power radio module, is connected with micro treatment module, uses micropower wireless mode to complete the data transmission between charging pile and other charging pile and cell data centralized management unit;

Described carrier communication module is accepted the instruction of micro treatment module and the data that receive is back to micro treatment module;

Described filtration module, is connected with carrier communication module, for completing the filtering function of the interference signal of carrier communication.

3. the complementary charging pile of the two nets of the wireless carrier for common cell as claimed in claim 2, is characterized in that, under normal circumstances, micro treatment module be take micro power radio module communication as main, and the data of carrier communication module are as preliminary data and verification; When around, occur interference or other factors impact, while causing cannot normally carrying out transfer of data by micro power radio module, it is that master carries out data interaction that communication module turns by carrier communication module, until micro power radio module recovers normal communication.

4. the complementary charging pile of the two nets of the wireless carrier for common cell as claimed in claim 2, is characterized in that,

The wireless operating frequency of 470mHz～490mHz that described micro power radio module adopts the national radio committee to require, adopts forward error correction channel technology, and air transfer rate can reach 100Kbps, and the non-relay transmitting distance in open ground can reach 1500 meters.

5. the wireless carrier for common cell as claimed in claim 2 pair is netted complementary charging pile, it is characterized in that, described micro power radio module is supported wireless self-networking, completes the communication network tissue of all charging piles in common cell in the situation that of prosthetic intervention.

6. the wireless carrier for common cell as claimed in claim 2 pair is netted complementary charging pile, it is characterized in that, described micro power radio module carries out data interaction between any two, supported data transmits, with this, realize data multilevel relaying, the mode of transmitting by one-level level, is sent to final destination by data.

7. the wireless carrier for common cell as claimed in claim 2 pair is netted complementary charging pile, it is characterized in that, described micro power radio module is realized radio band automatic frequency-hopping function, when there is the micropower wireless signal of other community charging pile around in common cell, micro power radio module can pass through automatic frequency-hopping function, change communication frequency, avoid and the conflicting of other district wireless signals.

8. the wireless carrier for common cell as claimed in claim 2 pair is netted complementary charging pile, it is characterized in that, described micro power radio module is realized in power tolerance band and automatically being adjusted, when and when around the wireless signal between other micro power radio modules is weak, automatically strengthen transmitting power, strengthen signal, communication reliability is provided; When and when around the wireless signal between other micro power radio modules is stronger, under the prerequisite that guarantees communication success rate, automatically reduce transmitting power, reduce electric energy loss.

9. the wireless carrier for common cell as claimed in claim 2 pair is netted complementary charging pile, it is characterized in that, described filtration module comprises transmission active filter, sends passive filter, receives passive filter, when data send, active filter completes the active power filtering of signal of communication and power amplifier is amplified, then is coupled to power line and carries out signal transmission through sending passive filter; During data receiver, signal of communication is sent into microprocessor and is processed after receiving passive filter.

10. for the two application processes of netting complementary charging pile of wireless carrier of common cell, it is characterized in that, comprise following steps:

Step 1: after charging pile installs, start charging pile, allow the work of charging pile communication module, carry out micro power radio module and carrier module MANET, set up each charging pile to the communication route of cell data centralized management unit, and record the communication quality of communication route; After networking completes, the successful charging pile of failed cluster is debugged;

Step 2: when charging pile and cell data centralized management unit carry out data interaction, communication module in charging pile first by Data dissemination to micro power radio module and carrier module, by two kinds of modes of wireless and carrier wave, to cell data centralized management unit, send data simultaneously;

Step 3: during by wireless mode communication, communication module carries out communication according to the optimum communication route of the arrival cell data centralized management unit recording in internal memory, as Communications failure is selected suboptimum communication route successively, and according to this communication route service condition, adjust the success rate of each communication route in internal memory; As wireless communication mode is temporarily abandoned in continuous failure;

Step 4: charging pile communication module receives and data carrier wave two kind modes wireless from micropower simultaneously, and data are compared and verification, and the data that the micropower of take is wireless are as main, and carrier data is auxiliary; Within at the appointed time, do not receive the data that micropower is wireless, get carrier data and carry out subsequent analysis;

Step 5: as the charging pile that exists micropower wireless signal to network, start by set date MANET function, for this charging pile re-establishes wireless telecommunications route.

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