CN203590258U - Vehicle interface unit for digital passenger information system - Google Patents
Vehicle interface unit for digital passenger information system Download PDFInfo
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- CN203590258U CN203590258U CN201320745454.2U CN201320745454U CN203590258U CN 203590258 U CN203590258 U CN 203590258U CN 201320745454 U CN201320745454 U CN 201320745454U CN 203590258 U CN203590258 U CN 203590258U
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- interface unit
- interface
- hdlc
- information system
- vehicle
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- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
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Abstract
The utility model provides a vehicle interface unit for a digital passenger information system. The vehicle interface unit comprises a micro-control unit, an HDLC interface unit and a network card chip, wherein the micro-control unit is connected with the HDLC interface unit and the network card chip, the network chip is connected with a network interface, and the HDLC interface unit is connected with an RS485 interface unit; and the RS485 interface unit is connected with a TMS interface. The vehicle interface unit has the advantages that display contents are transmitted and received by the network interface, thereby improving the communication speed and reducing the data processing time; switching between the RS485 interface and the HDLC interface unit can be realized by directly arranging an HDLC dwell vessel instead of using jumper wires of hardware; and the vehicle interface unit is also simple in structure, convenient to use and high in information transmission efficiency.
Description
Technical field
The utility model belongs to broadcast system field, especially relates to a kind of vehicle interface unit for digital passenger information system.
Background technology
In the passenger information system of the field of traffic such as light rail, subway, drivers' cab rack arranges a vehicle interface unit, and for converting signals of vehicles to network signal, and digital passenger information system status signal is to the forwarding of TMS.In existing technology, vehicle interface unit adopts the ARM7 chip that carries HDLC, needs the wire jumper on hardware to solve in the conversion of carrying out RS485 interface and HDLC, exists and uses the technical problems such as inconvenient, data processing time is long.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of vehicle interface unit simple in structure, easy to use, is especially suitable for light rail, in the passenger information system of the field of traffic such as subway.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of vehicle interface unit for digital passenger information system, comprise micro-control unit, HDLC interface unit and network card chip, described micro-control unit is connected with network card chip with described HDLC interface unit respectively, described network card chip is connected with network interface, described HDLC interface unit is connected with RS485 interface unit, and described RS485 interface unit is connected with TMS interface.
Further, the main control chip of described micro-control unit is STM32F207.
Further, the chip of described HDLC interface unit is Z16C03.
Further, described network card chip is DP83848.
Further, the chip of described RS485 interface unit is MAX1483.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, by network interface, receive and dispatch displaying contents, improved traffic rate, reduced data processing time, the conversion of RS485 interface and HDLC no longer needs the wire jumper on hardware to solve, and the register that HDLC is directly set can be realized; There is simple in structure, easy to use, information transfer efficiency advantages of higher.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
As shown in Figure 1, a kind of vehicle interface unit for digital passenger information system of the utility model, comprise micro-control unit, HDLC interface unit and network card chip, described micro-control unit is connected with network card chip with described HDLC interface unit respectively, described network card chip is connected with network interface, described HDLC interface unit is connected with RS485 interface unit, described RS485 interface unit is connected with TMS interface, the main control chip of described micro-control unit is STM32F207, the chip of described HDLC interface unit is Z16C03, described network card chip is DP83848, the chip of described RS485 interface unit is MAX1483.
The course of work of this example: during work, network interface and TMS interface receive the data that transmit, the information exchange that network interface receives is crossed network card chip and is sent to micro-control unit, the communication interface of numeral passenger information system and vehicle TMS comprises RS485 interface, HDLC interface etc., the conversion of RS485 interface and HDLC realizes by the register of HDLC is directly set, main control chip is that the micro-control unit of STM32F207 is processed the data that transmit by network interface and TMS interface, the data that then will forward are transferred to PIS system and TMS system by network interface and TMS interface, network card chip is responsible for communicating by letter of vehicle interface unit and PIS system, vehicle interface unit receives the state information of PIS system by network interface, after conversion, by TMS interface, forward.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (5)
1. the vehicle interface unit for digital passenger information system, it is characterized in that: comprise micro-control unit, HDLC interface unit and network card chip, described micro-control unit is connected with network card chip with described HDLC interface unit respectively, described network card chip is connected with network interface, described HDLC interface unit is connected with RS485 interface unit, and described RS485 interface unit is connected with TMS interface.
2. a kind of vehicle interface unit for digital passenger information system according to claim 1, is characterized in that: the main control chip of described micro-control unit is STM32F207.
3. a kind of vehicle interface unit for digital passenger information system according to claim 1, is characterized in that: the chip of described HDLC interface unit is Z16C03.
4. a kind of vehicle interface unit for digital passenger information system according to claim 1, is characterized in that: described network card chip is DP83848.
5. a kind of vehicle interface unit for digital passenger information system according to claim 1, is characterized in that: the chip of described RS485 interface unit is MAX1483.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320745454.2U CN203590258U (en) | 2013-11-22 | 2013-11-22 | Vehicle interface unit for digital passenger information system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320745454.2U CN203590258U (en) | 2013-11-22 | 2013-11-22 | Vehicle interface unit for digital passenger information system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590258U true CN203590258U (en) | 2014-05-07 |
Family
ID=50588101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320745454.2U Expired - Lifetime CN203590258U (en) | 2013-11-22 | 2013-11-22 | Vehicle interface unit for digital passenger information system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590258U (en) |
-
2013
- 2013-11-22 CN CN201320745454.2U patent/CN203590258U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |
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| CX01 | Expiry of patent term |