WO2011063635A1

WO2011063635A1 - Vehicle data recording device

Info

Publication number: WO2011063635A1
Application number: PCT/CN2010/073808
Authority: WO
Inventors: 赵国平; 蔡景荣; 李砾工; 张立斌; 王建强; 李时智; 王忠福; 刘维洋
Original assignee: 中国北车股份有限公司大连电力牵引研发中心
Priority date: 2009-11-24
Filing date: 2010-06-11
Publication date: 2011-06-03
Also published as: CN201549004U

Abstract

A vehicle data recording device includes a main processor (1) and an auxiliary processor (2). The main processor (1) is integrated with a controller local area network interface (11), a first RS485 interface (12) and a second RS485 interface (13), for obtaining traveling data from a rail vehicle by connecting the controller local area network interface (11) and/or the first RS485 interface (12) with the rail vehicle bus. The auxiliary processor (2) is integrated with a third RS485 interface (21) and a memory (22). The third RS485 interface (21) is connected with the second RS485 interface (13) of the main processor (1) through RS485 data lines, for receiving traveling data from the main processor (1) through RS485 data lines and storing the received traveling data in the memory (22).

Description

Vehicle data recording device

The invention relates to a data acquisition and storage technology, in particular to a vehicle data recording device, belonging to the field of data recording. Background technique

At present, China's rail transit has entered a period of rapid development, especially the emerging demand for rail vehicles, such as trams, subway traffic, light rail transit, and intercity traffic, which has pushed China's rail transit to a new peak. With the increase in rail vehicles, how to ensure the safe operation of vehicles becomes a crucial issue. In the case of large railways, such as existing locomotives and high-speed EMUs, they are equipped with special traffic safety devices and data recording devices. At present, the driving safety protection device and data recording device mainly used in China's large railway industry is LKJ2000. The LKJ2000 train operation monitoring and recording device mainly includes: monitoring host (dual module redundancy) and display (digital display or screen display), and its associated pressure sensor (pressure on train pipe, balance air cylinder, brake cylinder) Detection), photoelectric speed sensor, locomotive signal, ground information receiver (such as anti-collision device), locomotive operating conditions, diesel engine speed, brake control mechanism (including common brake and emergency bleed valve), double needle speedometer, The flat-lighting display device, the TAX2 box (multiple safety monitoring, operation information transmission providing interface), the locomotive whistle recording device, and the accident status recorder are composed.

The LKJ2000 train operation monitoring and recording device collects and records a wide variety of driving data, for example, by installing a pressure sensor to collect pressure information such as the balanced cylinder pressure and brake cylinder pressure of the locomotive; directly installing the photoelectric speed sensor from the locomotive Collect the speed information of the locomotive and display the actual speed of the locomotive operation by driving the double needle speedometer; other locomotive signal information is collected by input/output (I/O) hard line, or by RS485/RS422 serial communication mode in two The bus connection between the devices is acquired; and the various information data collected in the locomotive is recorded by the accident status recorder. In addition, the controller area network (CAN) is used as the internal communication network of the LKJ2000 type train operation monitoring and recording device, and the monitoring host realizes other modules in the LKJ2000 train operation monitoring and recording device through the two-way CAN serial bus or the VEM parallel bus. Control and management. However, the LKJ2000 train operation monitoring and recording device has many data collection functions, and is not completely suitable for signal collection of vehicles such as light rail or subway; and, because the LKJ2000 train operation monitoring and recording device has a large number of functions for collecting data, it is necessary to require various modules. The data is correspondingly collected, and the recorded data is downloaded to the ground microcomputer system through a special dumper, thereby causing the structure and operation of the LKJ2000 train operation monitoring and recording device to be complicated, bulky, and expensive to manufacture; The LKJ2000 train operation monitoring and recording device mainly collects data through I/O hard line, and can only provide common interfaces such as RS485 and RS422 in terms of external communication interface. Summary of the invention

It is an object of the present invention to provide a vehicle data recording apparatus having two processors, the main processor acquiring driving data from a rail vehicle through a controller local area network interface and/or a first RS485 interface, and the auxiliary processor passing the RS485 data line The main processor receives the driving data, thereby realizing the function of collecting the necessary driving data of the small-track vehicle by the data recording device, and realizing the structure and operation of the vehicle data recording device, the volume is small, and the manufacturing cost is low.

To achieve the above object, the present invention provides a vehicle data recording apparatus comprising: a main processor and an auxiliary processor,

The main processor is integrated with a controller local area network interface, a first RS485 interface and a second RS485 interface for connecting the rail vehicle bus through the controller local area network interface and/or the first RS485 interface, from the rail vehicle Get driving data on;

The auxiliary processor is integrated with a third RS485 interface and a memory, and the second RS485 interface of the third RS485 interface and the main processor is connected through an RS485 data line, and is used to pass through the RS485 data line. The main processor receives the driving data and stores the received driving data in the memory.

The vehicle data recording apparatus as described above, further comprising: a chassis for protecting the driving data, the auxiliary processor and the memory being packaged in the chassis.

In the vehicle data recording device as described above, the outer casing of the casing is a high-strength aluminum alloy casing, and the inner wall of the casing is an inner wall of a fireproof material having high temperature resistance and poor thermal conductivity. The vehicle data recording device as described above, wherein the memory is a secure digital memory card, and the auxiliary processor further includes a controller for controlling the secure digital memory card to store the driving data.

The vehicle data recording apparatus as described above, wherein the auxiliary processor further integrates an Ethernet interface for downloading the driving data from the memory through the Ethernet interface.

The vehicle data recording device as described above, wherein: the first power interface, the second power interface, and the power module, the power module converts a DC voltage used in the rail vehicle into a power supply voltage required by the main processor And supplying the power supply voltage to the main processor through the first power interface, converting a DC voltage used in the rail vehicle to a power supply voltage required by the auxiliary processor, and passing the second A power interface provides the supply voltage to the auxiliary processor.

The vehicle data recording apparatus as described above, wherein the third RS485 interface, the Ethernet interface, and the second power interface are disposed on the chassis.

The vehicle data recording apparatus as described above, wherein the third RS485 interface, the Ethernet interface, and the second power interface are connectors that closely fit the chassis.

As can be seen from the above technical solutions, the present invention has the following advantageous effects by employing the vehicle data recording device:

1. The main processor provides two interfaces: RS485 bus interface and CAN bus interface. It is suitable for the signal acquisition of different types of rail vehicle bus output. The interface is comprehensive and the driving data is convenient to collect.

2. The function of obtaining driving data through the connected rail vehicle bus is perfect, which can meet the requirements for data recording of rail vehicles such as subways and light rails;

3. Since only a small rail vehicle is required to perform functions required for safe driving, the vehicle data recording device is simple in structure, small in size, and low in manufacturing cost, and can be widely applied to the rail transportation industry;

4. Design a high-reliability chassis for protecting driving data to avoid the impact of accidents on the preservation of driving data;

5. Using a technologically advanced secure digital memory card to store driving data, the card reader of the memory card can be directly used to read the stored driving data, so that the vehicle data recording device has a large storage space. The utility model has the advantages of small overall volume, convenient installation, and the like, and does not require special equipment for reading the stored driving data, which brings great convenience to the fault finding, analysis and solution of the rail vehicle, and effectively ensures the safety of the rail transit vehicle operation;

6. Quickly download the stored driving data through the Ethernet interface, so that the driving data can be transmitted without plugging and unplugging the safety digital memory card.

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. DRAWINGS

1 is a schematic structural view of a first embodiment of a vehicle data recording apparatus according to the present invention;

2 is a schematic structural view of a second embodiment of a vehicle data recording apparatus according to the present invention;

3 is a circuit diagram of an RS485 interface of the vehicle data recording device of the present invention;

4 is a circuit diagram of a CAN interface of a vehicle data recording device of the present invention;

Figure 5 is a circuit diagram of an SD memory card interface of the vehicle data recording device of the present invention. detailed description

The present invention provides a vehicle data recording apparatus, including: a main processor and an auxiliary processor, wherein the main processor is integrated with a Controller Area Network (CAN) interface, a first RS485 interface, and a second RS485 interface. For connecting the rail vehicle bus through the CAN interface and/or the first RS485 interface, obtaining driving data from the rail vehicle; the auxiliary processor is integrated with the third RS485 interface and the memory, and the third RS485 interface is integrated with the main processor and the second RS485 The interface is connected through the RS485 data line, and is used for receiving driving data from the main processor through the RS485 data line, and storing the received driving data in the memory. For the rail vehicle, the vehicle data recording device of the invention adopts two processors, wherein the main processor provides two interfaces of RS485 bus interface and CAN bus interface, and is suitable for collecting signals of different types of rail vehicle bus outputs, interfaces. The vehicle data recording device is fully functional and can meet the requirements for data recording of rail vehicles such as subways and light rails. Moreover, the vehicle data recording device has the advantages of simple structure, small size, convenient installation and low manufacturing cost. And so on, can be widely used in the rail transit industry. 1 is a schematic structural view of a first embodiment of a vehicle data recording apparatus of the present invention. As shown in FIG. 1, the vehicle data recording apparatus includes: a main processor 1 and an auxiliary processor 2. The main processor 1 is integrated with a CAN interface 11, a first RS485 interface 12 and a second RS485 interface 13 for connecting the rail vehicle bus through the CAN interface 11 and/or the first RS485 interface 12 to obtain driving data from the rail vehicle. Wherein, since the vehicle bus connected to each device or detecting device on the current rail vehicle may be a bus under the CAN network protocol, it may also be a bus under the RS485 protocol, and may also have a bus under both protocols, therefore, the vehicle The main processor 1 of the data recording device integrates two protocol mode interfaces to connect with different vehicle buses to obtain the driving data of the rail vehicle; in addition, the driving data of the rail vehicle includes the speed, temperature and voltage of the whole vehicle. The parameters also include operational status information of various devices in the vehicle, such as: operating status information of air conditioners, various doors, traction systems, brake systems, and the like. The auxiliary processor 2 is integrated with a third RS485 interface 21 and a memory 22, and the second RS485 interface 21 of the third RS485 interface 21 is integrated with the second RS485 interface 13 through the RS485 data line for receiving from the main processor 1 through the RS485 data line. The driving data is stored in the memory 22 in the received driving data. The RS485 data line is used for communication between the main processor 1 and the auxiliary processor 2, which can enhance the anti-interference in the data transmission process.

In the vehicle data recording device provided by the embodiment, the main processor provides two interfaces of RS485 bus interface and CAN bus interface, and is suitable for collecting signals of different types of rail vehicle bus outputs, and has comprehensive interface and convenient collection of driving data; The function of the recording device is perfect, and can meet the requirements for data recording of rail vehicles such as subways and light rails; and, because only a small rail vehicle is required to safely drive the functions required, the vehicle data recording device is simple in structure and operation, and small in size. And the manufacturing cost is low, and it can be widely used in the rail transit industry.

2 is a schematic structural view of a second embodiment of a vehicle data recording apparatus of the present invention. As shown in FIG. 2, based on the above embodiment, the vehicle data recording apparatus further includes: a chassis 3 for protecting driving data, and the auxiliary processor 2 and the memory are packaged in the chassis 3. The chassis 3 is a dedicated enclosure with a high degree of protection to maximize driving data. The chassis 3 can be made of a high-strength aluminum alloy casing, which ensures that the chassis structure is stable and does not undergo large deformation when subjected to large pressure, thereby effectively protecting the memory from damage; in order to be in a fire, high temperature environment, etc. Save The protection of the reservoir uses a fireproof material with high temperature resistance and poor thermal conductivity inside the chassis 3. In addition, as shown in FIG. 2, the memory in the auxiliary processor 2 of the vehicle data recording device may be a Secure Digital (SD) memory card 23, and the auxiliary processor 2 is further integrated with a controller 24 for The SD memory card 23 is controlled to store the driving data. The SD memory card 23 has the advantages of small size, large storage space, convenient replacement, and the like, and even when the data recording device is damaged, the card reader of a normal SD memory card 23 can acquire vehicle data. No special equipment is required to operate.

In addition, as shown in FIG. 2, the auxiliary processor 2 also integrates an Ethernet interface 25 for downloading driving data from the SD memory card 23 via the Ethernet interface 25. In the case that the vehicle data recording device is operating normally, the driving data in the vehicle data recording device can be conveniently and quickly downloaded through the Ethernet interface 25 without opening the chassis 3 to take out the SD memory card 23 and then using the card reader. Read driving data.

In addition, as shown in FIG. 2, based on the above embodiment, the vehicle data recording apparatus further includes: a first power interface 4, a second power interface 5, and a power module 6. The power module 6 converts the DC voltage used in the rail vehicle into the power supply voltage required by the main processor 1, and supplies the power supply voltage to the main processor 1 through the first power interface 4, and converts the DC voltage used in the rail vehicle into an auxiliary. The supply voltage required by the processor 2 is supplied to the auxiliary processor 2 through the second power interface 5. The main processor and the auxiliary processor in the vehicle data recording apparatus generally use a power of 5V or 3.3V, and the power module 6 is responsible for the conversion of the power source. In the design of the power supply, fully consider the situation that the rail vehicle mainly uses DC110V power supply or DC24V power supply. When selecting the power supply module, the same package structure is adopted for the DC110V and DC24V power supply. In practical applications, the DC110V or DC24V power supply can be selected according to specific needs.

In addition, as shown in FIG. 2, on the basis of the above embodiment, the third RS485 interface 21, the Ethernet interface 25, and the second power interface 5 may be disposed on the chassis 3. That is, the chassis 3 protects the internal auxiliary processor 2, the SD memory card 23, and the controller 24, and sets each interface on the casing of the chassis 3. The third RS485 interface 21, the Ethernet interface 25, and the second power interface 5 can be a connector that closely fits the chassis 3. The connector can be protected to IP67, thereby effectively preventing liquid intrusion. The inside of the box 3.

In addition, when designing the vehicle data recording device, the entire data recording device is not placed in the chassis 3, mainly based on the connection of the vehicle data recording device to the vehicle bus with the CAN interface 11 or the first RS485 interface 12, if The CAN interface 11 and the first RS485 interface 12 are disposed on the chassis 3, and a special connector is required when accessing the vehicle bus, and the versatility is poor; and the power module 6 has a relatively high heat amount, and if placed in the sealed chassis 3, it is easy. As a result, the heat in the chassis 3 cannot be dissipated. If the operation is long, the internal temperature of the chassis 3 is too high, which may cause damage to the electronic device.

The vehicle data recording device will be described in detail below through a specific chip and interface connection circuit.

The two processors used in the embodiments of the present invention respectively have a 64K byte high speed flash, a 4K+256 byte high speed SRAM, two UART serial interfaces, and a main processor C8051F040 and an auxiliary processor S3C2410Ao C8051F040. A universal 16-bit timer, an on-chip watchdog timer, and a temperature sensor. The S3C2410A is a low cost, highly integrated, ARM920T based 32-bit RISC microprocessor. The S3C2410A integrates a NAND Flash controller, SDRAM controller, three UART serial ports, four-channel DMA, four-channel PWM timers, and 17 multi-function I/O ports, an RTC real-time clock, and an 8-channel 10-bit ADC.

3 is a circuit diagram of an RS485 interface of the vehicle data recording device of the present invention. As shown in Figure 3, the main processor C8051F040 uses the UART0 port to communicate with the UART0 port of the auxiliary processor S3C2410A. In order to enhance the anti-jamming capability, the level conversion module MAX485 is added to the UART0 ports of the two processors, and the level signal is Converted to RS485 differential signal. In addition, the main processor C8051F040 uses the UART1 port to provide an RS485 bus interface to the vehicle bus for collecting data from the vehicle bus.

4 is a circuit diagram of a CAN interface of the vehicle data recording apparatus of the present invention. As shown in Figure 4, the main processor C8051F040 provides the CAN bus widely used in rail transit. The C8051F040 integrates the CAN bus interface internally. When designing the CAN bus interface, the SN65HVD230 is used as the CAN transceiver to complete the level conversion.

In addition, the RS485 bus and the CAN bus are standard buses for rail vehicle applications, and the connector type of the vehicle data recording device is D-SUB9. Figure 5 is a circuit diagram of an SD memory card interface of the vehicle data recording device of the present invention. As shown in FIG. 5, the memory used in the vehicle data recording device is an SD memory card, the auxiliary processor S3C2410A integrates a controller of the SD memory card, J17 is a card inserted into the SD memory card, and CLK is an SD memory card. The controller provides a clock signal, CMD is a bidirectional command/response signal, and DATA0, DATA1, DATA2, and DATA3 are 4-bit data signals. The SD memory card can be implemented with only one bit of data DTA0. PAD1, PAD2 are connected to the housing of the SD memory card. In addition, each signal of the SD memory card needs to be connected to a 10K ohm pull-up resistor, and C132 and C83 are filter capacitors.

In addition, because the auxiliary processor S3C2410A does not have a built-in Ethernet controller, the DM9000AE can be used as a network chip controller to implement the Ethernet interface. The network transformer is used.

It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the embodiments of the present invention. The technical solutions of the present invention may be modified or equivalently substituted, and the modified technical solutions may not deviate from the spirit and scope of the technical solutions of the present invention.

Claims

Claim

A vehicle data recording device, comprising: a main processor and an auxiliary processor, wherein the main processor is integrated with a controller local area network interface, a first RS485 interface, and a second RS485 interface, The controller local area network interface and/or the first RS485 interface is coupled to the rail vehicle bus to obtain driving data from the rail vehicle;

2. The vehicle data recording device of claim 1, further comprising: a chassis for protecting the driving data, the auxiliary processor and the memory being packaged in the chassis.

3. The vehicle data recording device according to claim 3, wherein the outer casing of the casing is a high-strength aluminum alloy casing, and an inner wall of the casing is an inner wall of a fireproof material having high temperature resistance and poor thermal conductivity.

4. The vehicle data recording apparatus according to claim 4, wherein the memory is a secure digital memory card, and the auxiliary processor further includes a controller for controlling the secure digital memory card to Driving data is stored.

The vehicle data recording apparatus according to claim 5, wherein the auxiliary processor further integrates an Ethernet interface for downloading the driving data from the memory through the Ethernet interface.

6. The vehicle data recording apparatus according to claim 6, further comprising: a first power interface, a second power interface, and a power module, wherein the power module converts a DC voltage used in the rail vehicle into a supply voltage required by the main processor, and providing the main processor with the supply voltage through the first power interface, converting a DC voltage used in the rail vehicle to the auxiliary processor a supply voltage, and the supply voltage is provided to the auxiliary processor through the second power interface.

7. The vehicle data recording apparatus according to claim 7, wherein the third RS485 interface, the Ethernet interface, and the second power interface are disposed on the chassis.

8. The vehicle data recording apparatus according to claim 8, wherein the third RS485 interface, the Ethernet interface, and the second power interface are connectors that closely fit the chassis.