CN208539921U - Onboard wireless gateway - Google Patents

Abstract

The utility model relates to a kind of onboard wireless gateway, including core board, USB interface, Wi-Fi circuit and the CAN interface for connecting vehicle electronic device.The wireless communication port of core board connects Wi-Fi circuit by USB interface, and data transmission port connects CAN interface.The signal that core board can receive CAN interface is converted into parallel data signal, and is transmitted to Wi-Fi circuit by USB interface；Wi-Fi circuit can convert radio signals into parallel data signal, and pass sequentially through USB interface, core board is forwarded to CAN interface.Based on above structure, it can be realized the communication data of quickly processing vehicle electronic device, meet the demand of quick, the convenient interaction of vehicle electronic device data, it can be applied in rail traffic, the maintenance of vehicle electronic device, firmware upgrade and in terms of, have high practicability, can be avoided traditional vehicle electronic device upgrading, safeguards that there are high-risk, high altitude operation danger.

Description

Onboard wireless gateway

Technical field

The utility model relates to technical field of rail transit communication, more particularly to a kind of onboard wireless gateway.

Background technique

With the development of rail traffic, reasonably carry out metro vehicle maintenance work, to ensure railcar safe operation, It promotes vehicle riding quality and cuts operating costs and be of great significance.According to the technical performance of Car design, each portion The factors such as the environment that part service life under normal circumstances and vehicle use, car inspection and repair are provided with different maintenance grades The other and corresponding time between overhauls(TBO).Maintenance rank is divided into: repair in shop, un-wheeling repair, periodical repair, monthly test and column 5 classes of inspection.

Frequent and important maintenance task brings very harsh and hard work to maintenance personnel, during realization, Inventor has found that at least there are the following problems in traditional technology: vehicle electronic device data interaction complexity, safety inspection low efficiency.

Utility model content

Based on this, it is necessary to aiming at the problem that vehicle electronic device data interaction complexity, safety inspection low efficiency, provide one Kind onboard wireless gateway.

To achieve the goals above, the utility model embodiment provides a kind of onboard wireless gateway, including core Plate, USB (Universal Serial Bus universal serial bus) interface, Wi-Fi (Wireless-Fidelity, it is wireless to protect Very) circuit and the CAN (Controller Area Network, controller local area network) for connecting vehicle electronic device Interface；

The wireless communication port of core board connects Wi-Fi circuit by USB interface, and data transmission port connects CAN interface.

It in one of the embodiments, further include the power circuit for connecting core board.

It in one of the embodiments, further include the reset circuit and TF (Trans-flash) card interface for connecting core board.

Core board is Cortex-A7 core board in one of the embodiments,.

CPU (Central Processing Unit, the center of Cortex-A7 core board in one of the embodiments, Processor) model i.MX 6UL.

Cortex-A7 core board further includes coprocessor and SDRAM (Synchronous in one of the embodiments, Dynamic Random Access Memory, synchronous DRAM) memory；

The CPU of coprocessor, sdram memory connection Cortex-A7 core board.

Coprocessor is NEON MPE coprocessor in one of the embodiments,.

Sdram memory is DDR3 memory in one of the embodiments,.

Wi-Fi circuit includes the Wi-Fi chip for connecting USB interface in one of the embodiments,.

The model BCM43236 of Wi-Fi chip in one of the embodiments,.

A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:

Onboard wireless gateway includes core board, USB interface, Wi-Fi circuit and for connecting vehicle electronic device CAN interface.The wireless communication port of core board connects Wi-Fi circuit by USB interface, and data transmission port connection CAN connects Mouthful.The signal that core board can receive CAN interface is converted into parallel data signal, and is transmitted to Wi-Fi electricity by USB interface Road；Wi-Fi circuit can convert radio signals into parallel data signal, and pass sequentially through USB interface, core board is forwarded to CAN Interface.Based on above structure, it can be realized the communication data of quickly processing vehicle electronic device, meet vehicle electronic device data Quick, convenient interaction demand, can be applied in rail traffic, in the maintenance, firmware upgrade and dimension of vehicle electronic device Shield etc., has high practicability, can be avoided traditional vehicle electronic device upgrading, safeguards that there are high-risk, high altitude operation It is dangerous.

Detailed description of the invention

By being more particularly described for the preferred embodiment of the utility model shown in the drawings, addressed on the utility model Other purposes, feature and advantage will become more fully apparent.Identical appended drawing reference indicates identical part in all the attached drawings, and Attached drawing deliberately is not drawn by actual size equal proportion scaling, it is preferred that emphasis is the purport of the utility model is shown.

Fig. 1 is the first schematic diagram of onboard wireless gateway in one embodiment；

Fig. 2 is the operation schematic diagram of onboard wireless gateway in one embodiment；

Fig. 3 is the second schematic diagram of onboard wireless gateway in one embodiment；

Fig. 4 is the third schematic diagram of onboard wireless gateway in one embodiment；

Fig. 5 is the 4th schematic diagram of onboard wireless gateway in one embodiment.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model It is more thorough and comprehensive to open content.

It should be noted that it can be directly to separately when an element is considered as " connection " another element One element and it is in combination be integrated, or may be simultaneously present centering elements.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes Any and all combinations of one or more related listed items.

Currently, the existing construction of subway system in China is the regulation in metro design code (GB50157-2003): subway Rolling stock section can be divided into two kinds of maintenance rolling stock section (abbreviation rolling stock section) and utilization rolling stock section (abbreviation parking lot) according to function.Rolling stock section Major function: undertake the preventive overhauls tasks such as periodical repair, overhaul, the un-wheeling repair (repair in shop) of vehicle, the maintenance of equipment and equipment in section, Shunter, engineering truck etc. being reorganized and outfit and repairing, and in responsible section train park, organize into groups and current check, generic failure at Reason cleans and the daily maintenances such as scrubs and periodically sterilize.

Arrange inspection repair time between be divided into 1 day, monthly test be January, periodical repair is 1 year (also referred to as annual test), un-wheeling repair be generally 5 years, Overhaul 10 years.Wherein monthly test and column inspection are usually implemented in parking lot, and repair in shop, un-wheeling repair, periodical repair are usually implemented in rolling stock section.Specifically , the corresponding maintenance content of maintenance rank respectively include:

(1) repair in shop: comprehensively being decomposed, checked and rebuild including car body to various vehicle components and system, in conjunction with Part system is comprehensively replaced in technological transformation, carries out complete detection, debugging and test to each system of vehicle.

(2) un-wheeling repair: to the important component of vehicle, especially bogie and wheel to, motor, electric appliance, air-conditioner set, hitch it is slow It rushes device device, braking system etc. to be decomposed, cleaned, checked, detect a flaw, repaired, components are scrapped in replacement；Electric component is carried out Cleaning and test；Cleaning and volume test are carried out to battery；Complete detection, debugging and test are carried out to each system of vehicle.

(3) each system mode inspection, the detection of vehicle periodical repair: are substantially carried out；Each component is checked comprehensively, cleans, is lubricated, portion The cleaning, test and repairing and comprehensive debugging of train of sub-unit such as air-conditioner set, current-collector.

(4) monthly test: mainly the aerial dust filter of vulnerable part and wear part, associated components is checked；Carry out vehicle weight The inspection of point component and system mode, the cleaning of component, lubrication, replaces wear part.

(5) column inspection: routine check-up is carried out to the traffic safety relevant portion of train, and carries out troubleshooting.

So frequent and important maintenance task, very harsh and heavy work is brought to vehicle electronic device producer Make, meanwhile, rail traffic scene is also faced with the danger in high-altitude, operations involving high pressure.For this problem, the utility model embodiment provides A kind of onboard wireless gateway, can be applied in the data communication process of rail traffic electronic product.Service personnel can be In compartment or rolling stock section's safety place obtains the information of vehicle electronic device by wireless transmission, and energy upgrading products are solid Part both saves manpower, also ensures the safety of plant maintenance personnel, fill up the blank of track transportation industry safety inspection.

In one embodiment, as shown in FIG. 1, FIG. 1 is the first signals of onboard wireless gateway in one embodiment Property structure chart, provides a kind of onboard wireless gateway 100, including core board 110, usb 1 20, Wi-Fi circuit 130 And the CAN interface 140 for connecting vehicle electronic device 200；

The wireless communication port of core board connects Wi-Fi circuit by USB interface, and data transmission port connects CAN interface.

Specifically, the utility model embodiment can be applied to field of track traffic.The vehicles such as subway or train it is vehicle-mounted The CAN interface 140 of the connection onboard wireless gateway of electronic equipment 200；CAN interface 140, core board 110, usb 1 20 with And Wi-Fi circuit 130 is sequentially connected；Based on above structure, vehicle electronic device 200 can access cordless communication network, realize fast The data interaction of speed.

It should be noted that the quantity of CAN interface is at least one, can be used for accessing vehicle electronic device；Onboard wireless Gateway can connect multiple vehicle electronic devices simultaneously.

Core board can load Linux platform, can be used for realizing vehicle electronic device according to 802.11a/b/g/n/ac agreement Data wireless transmission.

Specifically, passing through USB interface after the signal received by CAN interface can be converted into parallel data signal by core board It is transmitted to Wi-Fi circuit；Parallel data signal can be converted into wirelessly by Wi-Fi circuit according to 802.11a/b/g/n/ac agreement Signal of communication.Wi-Fi circuit is converted into parallel data signal according to 802.11a/b/g/n/ac agreement, by wireless communication signals, It is forwarded to core board by USB interface, core board is forwarded to CAN interface again.

Further, core board is also used to the system initialization of gateway, realizes Wi-Fi network and CAN interface network Between data exchange, specifically: core board send Wi-Fi configuration parameter information；Wherein, Wi-Fi configuration parameter information includes just Beginningization AP (Wireless Access Point, wireless access points) state and initialization station state.

After initializing AP state, gateway, which enters, waits event handling state, and there are four types of modes: the first, abnormal thing Part returns to initialization AP state into abnormality processing state after Fault recovery；Second of request is closed, then user closes, and is entered Closed state；The third, sending and receiving data state；4th kind of processing connection status.

After initializing station state, AP is connected, after connecting AP, gateway, which enters, waits event handling state, there is three Kind mode: the first, anomalous event returns to initialization AP state into abnormality processing state after Fault recovery；Second of request It closes, then user closes, into closed state；The third, sending and receiving data state.

Wi-Fi circuit includes two kinds of operating modes: ap mode and station mode, as shown in Fig. 2, Fig. 2 is an implementation The operation schematic diagram of onboard wireless gateway in example.

Ap mode refers to that the utility model embodiment as a hotspot, receives the connection of other Wi-Fi equipments Mode, just as a wireless router.By configuring this mode.It, will be " wireless in Wi-Fi information after obtaining facility information Mode " is selected as AP；Setting radio band " Wi-Fi " is SSID (the Service Set that can be searched Identifier, service set) broadcast title；Cipher mode is " no password " or " WPA/WPA2 " (Wi-Fi Protected Access, Wi-Fi network secure accessing), user, which can choose, not to be encrypted or the cipher mode of WPA/WPA2, The latter needs the password of filling connection in " Wi-Fi password " below, can only allow know in visitor's connection of password in this way The product of the present embodiment.

Station mode refers to that the utility model embodiment is connected to the AP hot spot such as wireless router as a client On, realize the function of Radio Access Network.This function is applied, first it is to be understood that being connected router or other AP hot spots Wireless network name (SSID), wireless channel, cipher mode and key (password is not necessarily to if without encryption).For a TP- The radio configuration of LINK wireless router.Then the present embodiment can be configured with the present embodiment configuration software.By TP- The router wireless messages of LINK insert corresponding window.Setting submit change after, restarting equipment, into work normally when, this reality Applying example can be actively connected on the router that SSID is " USBCAN ".

Further, the utility model embodiment includes 3 kinds of operating modes:

1, it TCP (Transmission Control Protocol, transmission control protocol) Server mode: is serviced in TCP Under device (TCP Server) mode, the present embodiment will not actively be connect with other equipment, wait client (TCP always Client connection) can carry out bidirectional data communication after establishing TCP connection with client.In this mode, client can The equipment for connecting the utility model embodiment by the corresponding working port of CAN interface.

2, TCP Client mode: under TCP Client (TCP Client) mode, the utility model embodiment will be actively It is connect with pre-set TCP server.If connection is unsuccessful, client will constantly be tasted according to the condition of contact of setting Examination establishes connection with TCP server.After establishing TCP connection with TCP server end, bidirectional data communication can be carried out.At this Under mode, the IP of TCP server is determined by " Target IP (Internet Protocol, the agreement interconnected between network) "；TCP Service-Port is determined by " target port ".Effectively " target port " and " Target IP " shares 6 groups, and equipment can be according to setting Connection number is sequentially connected the specified TCP server of this 6 groups of parameters, until successful connection.

3, UDP (User Datagram Protocol, User Datagram Protocol) mode: UDP mode using udp protocol into Row data communication.UDP is a kind of communication mode for being not based on connection, it cannot be guaranteed that the data packet for being sent to destination host is correctly connect It receives, so needing to guarantee by the communication protocol on upper layer that data are correct to the higher occasion of reliability requirement；But because UDP mode is a kind of better simply communication mode, it not will increase excessive extra traffic, can provide than TCP mode more High communication speed, to guarantee the real-time of data packet.In fact, fairly simple in network environment, network communication load is not In the case where too big, UDP working method is not easy to malfunction.Work equipment in this manner, status be all it is equal, no Presence server and client.In this mode, the utility model embodiment receives user equipment hair using " working port " The UDP message packet sent；The data that the CAN interface of the utility model embodiment receives will be sent to 6 groups effective " Target IP " " target port ".

In the utility model embodiment, core board can load Linux platform, can be used according to 802.11a/b/g/n/ac Etc. agreements, complete mobile unit data wireless transmission.The communication data for realizing quickly processing vehicle electronic device, meets vehicle mounted electric The demand of quick, the convenient interaction of sub- device data, can be applied in rail traffic, maintenance, firmware in vehicle electronic device Upgrading and maintenance etc., have high practicability, can be avoided the upgrading of traditional vehicle electronic device, safeguard there are it is high-risk, The danger of high altitude operation.

In one embodiment, as shown in figure 3, Fig. 3 is the second signal of onboard wireless gateway in one embodiment Property structure chart, further include connect core board power circuit.

Specifically, power circuit connects core board, suitable electricity can be provided for each device in onboard wireless gateway Source.

In one embodiment, as shown in figure 3, further including the reset circuit and TF card interface for connecting core board.

Specifically, reset circuit connects core board, reset function can be provided for onboard wireless gateway.TF card interface Core board is connected, can be used for connecting TF card, is onboard wireless gateway extended storage capacity.

In one embodiment, as shown in figure 4, Fig. 4 is the third signal of onboard wireless gateway in one embodiment Property structure chart, core board be Cortex-A7 core board.

Specifically, the core board of Cortex-A7 type can be used in core board.Cortex-A7 core board may include Cortex- A7 chip.Cortex-A7 chip can be mounted with Linux platform

Optionally, the microprocessor of model MCIMX6Y2CVM08AA can be used in Cortex-A7 chip, have high-performance, The advantages that low-power consumption, small size, is suitble to the application of low-power consumption and limited space.Secondly, the microprocessor adds with hardware Ciphertext engine, tampering detection and dynamic dram (Dynamic Random Access Memory, dynamic random access memory) add The build-in functions such as close/decryption can be such that client is designed towards highly safe application.In addition, to the pin of microprocessor into Row optimization, can be used six layers of pcb board and is designed, further save cost.

In one embodiment, the model i.MX 6UL of the CPU of Cortex-A7 core board.

Specifically, the CPU of model i.MX 6UL can be used in Cortex-A7 core board.

In one embodiment, as shown in figure 4, Cortex-A7 core board further includes coprocessor and sdram memory；Association The CPU of processor, sdram memory connection Cortex-A7 core board.

Specifically, the CPU of Cortex-A7 core board is separately connected coprocessor and sdram memory.Coprocessor is available In the particular procedure task for mitigating system CPU；Sdram memory locks together CPU and RAM by an identical clock, makes RAM (random access memory, random access memory) and CPU can share a clock cycle, with identical speed Degree synchronous working can be improved with EDO memory (Extended Data Out DRAM, the DRAM of extension data output) compared to speed 50%.SDRAM is based on double bank structures, includes two staggered storage arrays, when CPU is from a memory bank or array accesses When data, another has just been that read-write data are got ready, and by the close switching of the two storage arrays, reading efficiency is just It can be increased exponentially.

Specifically, in one embodiment, coprocessor is NEON MPE coprocessor.

Specifically, in one embodiment, sdram memory is DDR3 memory.

Specifically, the more power saving of DDR3 memory, efficiency of transmission are faster.

In one embodiment, as shown in figure 5, Fig. 5 is the 4th signal of onboard wireless gateway in one embodiment Property structure chart, Wi-Fi circuit include connect USB interface Wi-Fi chip.

Specifically, Wi-Fi chip connects core board by USB interface, the signal transmitting and receiving between core board is realized.

In one embodiment, the model BCM43236 of Wi-Fi chip.

Specifically, Wi-Fi circuit includes the Wi-Fi chip and peripheral circuit of Botong BCM43236.BCM43236 is Dual-band Wi-Fi chip has two communications bands of 2.4GHz (Gigahertz) and 5GHz；Integrated form radio-frequency power amplifier (PAs) two frequency ranges of 2.4GHz and 5GHz can be accommodated, the demand of additional PAs is eliminated, reduces material cost (BOM)；In addition, BCM43236 is also equipped with antenna diversity, LDPC (Low Density Parity Check Code, low-density checksum Code), STBC (Space Time Block Coding, space-time block code) and can be used simultaneously the " fast of two wireless channels Fast channel switch " function.

In one embodiment, onboard wireless gateway can have following function:

1, support that either statically or dynamically IP is obtained.

2, support 64,128 encryption/decryption and 256 WEP (Wired Equivalent Privacy, it is wired Equivalent privacy agreement), TKIP (Temporal Key Integrity Protocol, Temporal Key Integrirty Protocol) or AES (Advanced Encryption Standard, Advanced Encryption Standard) key.

3, Wireless Fidelity protection access (WPA and WPA2.0) and IEEE 802.11i, including hardware-accelerated advanced number are supported According to encryption standard (AES)；

4, working port, Target IP and target port can be set.

5, network restores connection resource after disconnecting automatically, reliably establishes TCP connection.

6, TCP supports up to 200 connections, manages a CAN interface while meeting 6 groups of users.

7, each CAN interface supports 6 groups of Target IP sections under UDP mode, and multiple users can manage a CAN device simultaneously.

8, supported protocol includes ETHERNET (Ethernet), ARP (Address Resolution Protocol, address solution Analyse agreement), IP, ICMP (Internet Control Message Protocol, Internet Control Message Protocol), UDP, DHCP (Dynamic Host Configuration Protocol, dynamic host configuration protocol), DNS (Domain Name System, domain name system), TCP.

9, compatible SOCKET working method (TCP Server, TCP Client, UDP etc.), host computer communication software is write Defer to the SOCKET rule of standard.

10, CAN data and the transmission of Ethernet data bi-directional format.

11, flexible CAN interface data framing setting, meets the various subpackage demands of user.

12, each CAN interface can be respectively configured to as different operating modes, can flexible Application in various fields.

13, the also open diagnostic port of each CAN interface, host computer can obtain corresponding CAN interface by connecting this port Error condition.

14, the WLAN (Wireless Local Area Networks, WLAN) for integrating 2.4GHz/5GHz connects Mouthful, meet 802.11a/b/g/n/ac standard, supports AP and Station mode.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of onboard wireless gateway, which is characterized in that including core board, USB interface, Wi-Fi circuit and for connecting Connect the CAN interface of vehicle electronic device；

The wireless communication port of the core board connects the Wi-Fi circuit, data transmission port connection by the USB interface The CAN interface.

2. onboard wireless gateway according to claim 1, which is characterized in that further include the electricity for connecting the core board Source circuit.

3. onboard wireless gateway according to claim 1, which is characterized in that further include connecting answering for the core board Position circuit and TF card interface.

4. according to claim 1 to onboard wireless gateway described in 3 any one, which is characterized in that the core board is Cortex-A7 core board.

5. onboard wireless gateway according to claim 4, which is characterized in that the CPU of the Cortex-A7 core board Model i.MX 6UL.

6. onboard wireless gateway according to claim 4, which is characterized in that the Cortex-A7 core board also wraps Include coprocessor and sdram memory；

The coprocessor, the sdram memory connect the CPU of the Cortex-A7 core board.

7. onboard wireless gateway according to claim 6, which is characterized in that the coprocessor is NEON MPE association Processor.

8. onboard wireless gateway according to claim 6, which is characterized in that the sdram memory is DDR3 memory.

9. according to claim 1 to onboard wireless gateway described in 3 any one, which is characterized in that the Wi-Fi circuit Wi-Fi chip including connecting the USB interface.

10. onboard wireless gateway according to claim 9, which is characterized in that the model of the Wi-Fi chip BCM43236。