CN210402475U - Vehicle working condition recorder - Google Patents
Vehicle working condition recorder Download PDFInfo
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- CN210402475U CN210402475U CN201921348390.6U CN201921348390U CN210402475U CN 210402475 U CN210402475 U CN 210402475U CN 201921348390 U CN201921348390 U CN 201921348390U CN 210402475 U CN210402475 U CN 210402475U
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- power supply
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Abstract
The utility model relates to the field of vehicle-mounted equipment, in particular to a vehicle working condition recorder, which comprises a power supply adapter circuit, an interface conversion circuit, a FlexRay control circuit and a bus driving circuit; the power supply output end of the power supply adapting circuit is connected with the power supply input ends of the interface conversion circuit, the FlexRay control circuit and the bus driving circuit; the signal input end of the interface conversion circuit is connected with an LPC bus, and the signal output end of the interface conversion circuit is connected with the signal input end of the FlexRay control circuit; the signal output end of the FlexRay control circuit is connected with the signal input end of the bus driving circuit; and the signal output end of the bus driving circuit is connected with a FlexRay bus. The LPC bus can be used as a system interface, and all communication functions of the FlexRay bus can be realized only by using 8 signal cables. Therefore, the problems of wiring, layout and the like in the using process of a user are solved, and the reliability of the product is effectively guaranteed.
Description
Technical Field
The utility model relates to an mobile unit field, concretely relates to vehicle operating mode record appearance.
Background
The vehicle working condition recorder is used for recording various parameters of the vehicle during running and is widely applied to the field of vehicle detection. The existing vehicle working condition recorder has huge redundancy and no universality; the interfaces of the system are mostly in bus architectures such as PC104, cPCI and high-speed serial bus, wherein the number of signal cables of the PC104 bus and the cPCI is large, which brings great inconvenience to product use, and the high-speed serial bus interface is complex to realize and has interference problem in the transmission process.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the defect among the prior art, providing a use convenient, the vehicle operating mode record appearance that the reliability is high, can use the LPC bus as system interface. Therefore, the problems of wiring, layout and the like in the using process of a user are solved, and the reliability of the product is effectively guaranteed.
The utility model discloses a vehicle working condition recorder, which comprises a power supply adapting circuit, a power supply adapter circuit and a power supply adapter circuit, wherein the power supply adapting circuit is used for converting an interface level into a level required by a system;
the interface conversion circuit is used for converting the FlexRay control interface into an LPC bus interface;
the FlexRay control circuit is used for decoding the data forwarded by the interface conversion circuit from the LPC bus and sending the translated data to the isolation circuit; meanwhile, the FlexRay control circuit also receives data sent from a FlexRay bus through the isolation circuit, decodes the data and then transmits the decoded data to the interface conversion circuit;
the isolation circuit is used for isolating the FlexRay control circuit from the bus driving circuit so as to avoid the damage of the FlexRay control circuit caused by the difference of the working levels of the FlexRay control circuit and the bus driving circuit;
the bus driving circuit is used for driving the transceiving of FlexRay bus data, receiving the FlexRay bus data sent by the bus driving circuit and configuring the data to a FlexRay bus;
the power supply output end of the power supply adapting circuit is connected with the power supply input ends of the interface conversion circuit, the FlexRay control circuit and the bus driving circuit; the signal input end of the interface conversion circuit is connected with an LPC bus, and the signal output end of the interface conversion circuit is connected with the signal input end of the FlexRay control circuit; the signal output end of the FlexRay control circuit is connected with the signal input end of the bus driving circuit; and the signal output end of the bus driving circuit is connected with a FlexRay bus.
The utility model has the advantages that: the utility model discloses a vehicle operating mode takes notes appearance has realized the communication of LPC bus and FlexRay bus through power adaptation circuit, interface conversion circuit, FlexRay control circuit and bus drive circuit. Therefore, the problems of wiring, layout and the like in the using process of a user are solved, and the reliability of the product is effectively guaranteed.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a circuit diagram of the bus driving circuit of the present invention;
fig. 3 is a circuit diagram of the FlexRay main control circuit of the present invention.
Detailed Description
Fig. 1 is the utility model discloses a structural schematic diagram, as shown in the figure, vehicle operating mode record appearance fig. 1 in this embodiment is the utility model discloses a structural schematic diagram, as shown in the figure, based on FlexRay vehicle mounted bus communication system in this embodiment, include:
the power supply adapting circuit is used for converting the interface level into a level required by the system;
and the interface conversion circuit is used for converting the FlexRay control interface into an LPC bus interface. The interface conversion circuit function is mainly accomplished by FPGA, the incoming line is parallel interface bus of two FlexRay controllers separately, its data signal, address signal and operation mode signal, etc. connect separately, enter FPGA together with two isolated chip selection signals, process through FPGA, convert into 8-wire system LPC bus (LAD [3:0], LFRAME, LRESET, LCLK and SERIRQ line separately) and connect with user LPC bus, FPGA decodes the functional block diagram and is shown in figure 2;
the FlexRay control circuit is used for decoding the data forwarded by the interface conversion circuit from the LPC bus and sending the translated data to the isolation circuit; meanwhile, the FlexRay control circuit also receives data sent from a FlexRay bus through the isolation circuit, decodes the data and then transmits the decoded data to the interface conversion circuit;
the isolation circuit is used for isolating the FlexRay control circuit from the bus driving circuit so as to avoid the damage of the FlexRay control circuit caused by the difference of the working levels of the FlexRay control circuit and the bus driving circuit;
the bus driving circuit is used for driving the receiving and sending of FlexRay bus data; the bus driver circuit is used for receiving FlexRay bus data sent by the bus driver circuit and configuring the data to a FlexRay bus;
the power supply output end of the power supply adapting circuit is connected with the power supply input ends of the interface conversion circuit, the FlexRay control circuit, the isolating circuit and the bus driving circuit; the signal input end of the interface conversion circuit is connected with an LPC bus, and the signal output end of the interface conversion circuit is connected with the signal input end of the FlexRay control circuit; the signal output end of the FlexRay control circuit is connected with the signal input end of the isolation circuit; the signal output end of the isolation circuit is connected with the signal input end of the bus driving circuit; and the signal output end of the bus driving circuit is connected with the FlexRay bus.
In this embodiment, the power adapter circuit performs voltage conversion by using an AMS1117-3.3V linear voltage-stabilized power supply and a B0509T-9V switching power supply, so that the output level of the output end of the power adapter circuit is 3.3V and 9V.
As shown in fig. 3, in this embodiment, the FlexRay control circuit is composed of two paths, each path includes two channels, and is designed for dual redundancy and controlled by the main control chip MFR 4310. Wherein, pins 41, 36 and 33 of the main control chip MFR4310 are channel 1; pins 45, 44 and 43 are channel 2. Pins 29 and 64 of the main control chip MFR4310 are respectively connected with resistors R21 and R24 in series and then connected with a 3.3V alternating current power supply; pins 47 and 48 are connected in series with resistors R22 and R23 respectively and then grounded; pins 9, 38, 53, 31, 19, 49 and 60 are grounded; pins 8, 37, 54, 35, 20, 50 and 59 are connected with capacitors C21, C22, C23, C24, C25, C26 and C27 which are connected in parallel; pin 32 is connected in series with resistor R25 and then to ground; pins 24 and 24 are connected to the OUT and VCC pins of relay OS1, and pin 23 is connected in series with a capacitor C27 connected to the relay VCC pin.
In this embodiment, the isolation circuit changes the working level of the input terminal from the FlexRay control circuit to adapt to the working level of the bus driving circuit, thereby achieving the isolation effect. The isolation circuit is formed by matching a 4-channel digital isolator ADuM1401 with peripheral circuits thereof, is responsible for converting a main control 3.3V level into a 5V level, and plays a role in isolating and protecting the main control circuit.
As shown in fig. 2, in this embodiment, the bus driving circuit adopts a bus driving chip TJA1080A, and performs corresponding common mode and differential mode filtering processing on the bus driving circuit through filtering capacitors C11-C16 and a common mode choke T11, and meanwhile, the bus driving circuit is also matched with corresponding bus resistors, so that the bus can maintain a good waveform.
In this embodiment, each of the bus driver circuits is correspondingly connected to one of the FlexRay control circuits, wherein pins 5, 6, and 7 of the bus driver chip TJA1080A are correspondingly connected to pins 33, 36, and 42 of the main control chip MFR4310, respectively. And the P end and the N end of the bus driving circuit are output ends and are connected with a FlexRay bus.
The utility model discloses a communication of LPC bus and FlexRay bus has been realized to power adaptation circuit, interface conversion circuit, FlexRay control circuit, buffer circuit and bus drive circuit. Therefore, the problems of wiring, layout and the like in the using process of a user are solved, and the reliability of the product is effectively guaranteed.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. A vehicle operating condition recorder is characterized in that: the device comprises a power supply adaptation circuit, an interface conversion circuit, a FlexRay control circuit and a bus driving circuit; the power supply output end of the power supply adapting circuit is connected with the power supply input ends of the interface conversion circuit, the FlexRay control circuit and the bus driving circuit; the signal input end of the interface conversion circuit is connected with an LPC bus, and the signal output end of the interface conversion circuit is connected with the signal input end of the FlexRay control circuit; the signal output end of the FlexRay control circuit is connected with the signal input end of the bus driving circuit; and the signal output end of the bus driving circuit is connected with a FlexRay bus.
2. The vehicle condition recorder of claim 1, wherein: the FlexRay control circuit and the bus driving circuit are connected through an isolation circuit.
3. The vehicle condition recorder of claim 1, wherein: the power supply adaptation circuit adopts AMS1117-3.3V linear stabilized power supply and B0509T-9V switch power supply to carry out voltage conversion, so that the output level of the output end of the power supply adaptation circuit is 3.3V and 9V.
4. The vehicle condition recorder of claim 1, wherein: the bus driving circuit adopts a bus driving chip TJA 1080A.
5. The vehicle condition recorder of claim 1, wherein: the FlexRay control circuit employs a master control chip MFR 4310.
6. The vehicle condition recorder of claim 1, wherein: each bus driving circuit corresponds to one FlexRay control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921348390.6U CN210402475U (en) | 2019-08-20 | 2019-08-20 | Vehicle working condition recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921348390.6U CN210402475U (en) | 2019-08-20 | 2019-08-20 | Vehicle working condition recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210402475U true CN210402475U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921348390.6U Active CN210402475U (en) | 2019-08-20 | 2019-08-20 | Vehicle working condition recorder |
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| Country | Link |
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| CN (1) | CN210402475U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116232386A (en) * | 2022-12-28 | 2023-06-06 | 内蒙古第一机械集团股份有限公司 | RFID-based vehicle-mounted data communication system |
-
2019
- 2019-08-20 CN CN201921348390.6U patent/CN210402475U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116232386A (en) * | 2022-12-28 | 2023-06-06 | 内蒙古第一机械集团股份有限公司 | RFID-based vehicle-mounted data communication system |
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