CN111447244A - One-wire communication expansion communication method and device for electric vehicle - Google Patents
One-wire communication expansion communication method and device for electric vehicle Download PDFInfo
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- CN111447244A CN111447244A CN202010425767.4A CN202010425767A CN111447244A CN 111447244 A CN111447244 A CN 111447244A CN 202010425767 A CN202010425767 A CN 202010425767A CN 111447244 A CN111447244 A CN 111447244A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J99/00—Subject matter not provided for in other groups of this subclass
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Abstract
The invention discloses a one-line communication extended communication method and a device of an electric vehicle, which respectively decode first information of the electric vehicle transmitted in a first protocol mode and second information of the electric vehicle transmitted in a second protocol mode, add the decoded second information data to reserved bits of the decoded first information data to form fourth information, encrypt and verify the fourth information to obtain third information, the third information conforms to a third protocol, transmit the third information to an instrument controller of the electric vehicle, and realize the display of a plurality of data of the electric vehicle under the condition of little cost increase.
Description
Technical Field
The invention relates to the technical field of electric vehicle control, in particular to a one-wire communication expansion communication method and device for an electric vehicle.
Background
At present, as a travel tool, an electric vehicle is popular with most people, and an electric vehicle controller transmits the speed, gear and fault signals of the electric vehicle to a display screen for displaying in a one-wire communication transmission mode, so that partial display requirements of the electric vehicle can be met, but more data of the electric vehicle cannot be displayed, and multidirectional data are provided for a driver; the current electric vehicle controllers are various in types, the cost of the controller with more than 3 types of data transmission is high, the cost of the electric vehicle is increased, and the requirement for multi-data transmission cannot be met although the cost of the controller with only 3 types of data transmission is low.
Therefore, how to increase the amount of data transmission on a controller with only a small amount of data transmission to expand the transmission range of the electric vehicle controller is a problem to be solved.
Disclosure of Invention
The invention aims to provide a one-wire communication expansion communication method and a device of an electric vehicle.
The above object of the present invention is achieved by the following technical solutions:
an electric vehicle one-wire communication expansion communication method, wherein an electric vehicle controller communicates with an electric vehicle instrument to transmit electric vehicle information to the electric vehicle instrument, and the method comprises the following steps;
s1, receiving first information transmitted in a first protocol mode;
s2, receiving second information transmitted in a second protocol mode;
s3, converting the first information data and the second information data to obtain third information containing the first information data and the second information data;
and S4, transmitting the third information to the electric vehicle meter.
The invention is further configured to: and after the first information and the second information are decoded, adding the second information data to the reserved bit of the first information to obtain third information, wherein the third information corresponds to a third protocol.
The invention is further configured to: if the first information data comprises 15 bytes and the second information comprises 1 byte, the third information comprises 15 bytes; if the first information data includes 12 bytes and the second information includes 1 byte, the third information includes 12 bytes.
The invention is further configured to: the first protocol is a one-wire protocol; the second protocol is the 485 protocol, or CAN protocol.
The invention is further configured to: and adding the second information data to the 9 th byte of the first information to form fourth information, and encrypting and verifying the fourth information to form third information.
The invention is further configured to: and sending third information to the electric vehicle instrument at a certain frequency.
The above object of the present invention is also achieved by the following technical solutions:
the utility model provides an one-wire harness of electric motor car extension communication device, including first communication module, second communication module, conversion module, first communication module, second communication module is connected with conversion module respectively, first communication module is used for transmitting the first communication signal that accords with first agreement mode and gives conversion module, second communication module is used for transmitting the second communication information that accords with second agreement mode and gives conversion module, conversion module is used for converting first communication signal and second communication signal, form the third communication signal who contains first communication signal data and second communication signal data, and send the third communication signal with the set frequency.
The invention is further configured to: the first communication module comprises a wire communication module, and the second communication module comprises a 485 communication module or a CAN communication module.
The invention is further configured to: the conversion module comprises an MCU, a first group of interfaces of the MCU are communicated with a wire communication module, a second group of interfaces of the MCU are communicated with a 485 interface or a CAN interface, and a third group of interfaces transmit third communication signals.
The invention is further configured to: the MCU comprises a first group of interfaces including a DATA1 port, a second group of interfaces including a DE port, and a third group of interfaces including a DATA0 port, wherein the DATA0 port is connected with one end of a first resistor, the other end of the first resistor is connected with one end of a second resistor, a third resistor and a first capacitor, the other end of the second resistor is connected with a power supply, the other end of the first capacitor is connected with a power ground, and the other end of the third resistor is used as an output end PO; the DATA1 port is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one ends of a fifth resistor, a sixth resistor and a second capacitor, the other end of the fifth resistor is connected with a power supply, the other end of the second capacitor is connected with a power ground, and the other end of the sixth resistor is used as a first input end PI and used for transmitting a first communication signal conforming to a first protocol mode; the DE port is used as a second input end and is used for transmitting a second communication signal conforming to a second protocol mode.
Compared with the prior art, the invention has the beneficial technical effects that:
1. according to the communication method, the first signal data conforming to the first communication protocol and the second signal data conforming to the second communication protocol are combined to generate third signal data conforming to the third protocol, and the third signal data are transmitted to the electric vehicle display instrument, so that data expansion on the basis of the electric vehicle controller is realized, and the electric vehicle display range is enlarged;
2. furthermore, the data volume is expanded on the basis of not increasing the transmission bit number by adding the second signal data to the reserved bits of the first signal data;
3. furthermore, according to the communication device, the one-wire communication expansion board is additionally arranged on the electric vehicle controller, so that the expansion of the transmission data volume is realized on the basis of little cost increase, and the functions of the electric vehicle are improved.
Drawings
Fig. 1 is a schematic structural diagram of a wired-telecommunications device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power supply structure of a wire-line communication device according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a 485 communication module of an extended communications device for a wire-line communications according to an embodiment of the invention;
fig. 4 is a schematic diagram of a circuit configuration of a conversion circuit of a wireless communication device according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Detailed description of the preferred embodiment
The invention relates to an one-wire communication extended communication method of an electric vehicle, which is characterized in that an electric vehicle controller is communicated with an electric vehicle instrument to transmit electric vehicle information to the electric vehicle instrument, and comprises the following steps;
s1, receiving first information of the electric vehicle transmitted in a first protocol mode, wherein the first information conforms to the first protocol;
s2, receiving second information of the electric vehicle transmitted in a second protocol mode, wherein the second information conforms to the second protocol;
s3, converting the first information data and the second information data to obtain third information containing the first information data and the second information data;
and S4, transmitting the third information to the electric vehicle meter.
Specifically, first information conforming to a first protocol and second information conforming to a second protocol are received, the first information is decoded to obtain data in the first information, the second information is decoded to obtain data in the first information, then the data in the first information and the data in the second information form third information according to the format of the first protocol, the third information conforms to a third protocol, and then the third information is sent out.
In a specific embodiment of the present application, the first information data includes 12 bytes, the second information data includes 1 byte, one byte in the second information is added to the reserved bit in the first information to form fourth information different from the first protocol and the second protocol, because only the reserved bit data is added, the data length of the fourth information is the same as the data length of the first information, and then the third protocol information is encrypted and verified to obtain the third information.
In another embodiment of the present application, the first information data includes 15 bytes, the second information data includes 1 byte, one byte in the second information is added to the reserved bits in the first information to form a 15-byte third information, and the data length of the third information is the same as the data length of the first information because only the reserved bits are added.
In another specific embodiment of the present application, the first information conforms to a one-line communication protocol, the second information conforms to a 485 protocol, the second information is decoded to obtain 1-byte second information data, the first information conforming to the one-line communication protocol is decoded to obtain 12-byte or 15-byte first information data, the second information data is added to the 9 th byte of the reserved bit of the first information data to form fourth information, the fourth information is encrypted and verified to obtain third information, the third information is sent to the electric vehicle instrument in a one-line communication manner with a period of 250 milliseconds, and at this time, the electric vehicle instrument can receive the third information conforming to the third protocol, perform corresponding decoding, and display the third information.
In yet another embodiment of the present application, the second information conforms to the CAN protocol.
The data length of the second information is less than or equal to the number of reserved bits of the first information.
The second information is the oil quantity information of the electric vehicle, or the battery electric quantity information, or the battery voltage information, or the central control state information.
Detailed description of the invention
The utility model provides an electric motor car's an online extension communication device, as shown in fig. 1, including first communication module, second communication module, converting circuit, first communication module, second communication module are connected with converting circuit respectively.
The conversion circuit comprises an MCU, the first communication module is an electric vehicle controller and is connected with a DATA1 interface of the MCU, first information comprising speed, gear and fault information of the electric vehicle is transmitted to the conversion circuit in a one-wire communication protocol mode, and the conversion circuit decodes the first information to obtain 12-byte or 15-byte first information DATA.
The second communication module is a 485 module, is connected with a DATA0 interface of the MCU, and transmits the battery power information of the electric vehicle to the conversion circuit in a 485 communication mode to obtain second information DATA of 1 byte, wherein the second information includes the battery power, the battery voltage or the central control state of the electric vehicle.
The 9 th bit in the first information data is a reserved bit, the conversion circuit adds the second information data to the 9 th reserved bit, a new data message is formed, the fourth message comprises the first information data and the second information data, the fourth message is encrypted and verified to obtain a third message, the third message is transmitted to the electric vehicle instrument in a wire-through communication mode, and the electric vehicle instrument decodes the third message, so that the corresponding display is performed.
Detailed description of the preferred embodiment
The utility model provides a line of an electric motor car leads to extension communication device, includes power module, 485 communication module, converting circuit.
The power supply module comprises a first filter circuit, a three-terminal voltage stabilizing circuit and a second filter circuit which are sequentially connected, wherein the first filter circuit comprises a filter diode, a filter inductor and a filter capacitor set, the positive end of the filter diode D1 is connected with a 12V power supply, the negative end of the filter diode D1 is connected with one end of a filter inductor L1 and one end of a first filter capacitor C1, the other end of the filter inductor L1 is connected with one end of a second filter capacitor C2, one end of a third filter capacitor C3 and the input end of the three-terminal voltage stabilizing circuit, the other end of the first filter capacitor C1, the other end of the second filter capacitor C2 and the other end of the third filter capacitor C3 are grounded, and the second filter capacitor C2 is an electrolytic capacitor.
The output end of the three-terminal voltage stabilizing circuit is connected with the second filter circuit and is used as the output end of the power supply.
The second filter circuit comprises a fourth filter capacitor C4 and a fifth filter capacitor C5 which are connected in parallel, one end of the second filter circuit is connected with the output end of the three-terminal voltage stabilizer, and the other end of the second filter circuit is grounded.
And the three-terminal voltage regulator 7805 is used for converting the 12 voltage of the battery into 5V voltage and supplying power to the communication device.
The 485 communication module comprises a 485 chip and a peripheral circuit thereof, as shown in fig. 3, an ESD electrostatic protection diode PSM712 is connected between an A end and a B end of the 485 chip to provide protection for a 485 chip interface system and protect networked instrument and meter equipment from being damaged by ESD, EFT and lightning surge; meanwhile, a second resistor R2 and a third resistor R3 are connected in series between the A end and the B end, one end of a seventh capacitor C7 is connected to the connection point of the series resistors R2 and R3, and the other end of the seventh capacitor C7 is grounded.
The terminals RE and DE of the 485 chip are connected together and grounded through a first resistor R1. And the RO end and the DI end are respectively used as communication ends to realize communication with the MCU of the conversion circuit.
As shown in fig. 4, the DATA1 end of the MCU chip is connected to an input filter circuit, the input filter circuit includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a ninth capacitor C9, wherein the DATA1 end is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the eleventh resistor R11, the twelfth resistor R12, and the ninth capacitor C9, the other end of the eleventh resistor R11 is connected to the positive terminal of the power supply, the other end of the ninth capacitor C9 is grounded, and the other end of the twelfth resistor R12 is used as an input end of a wire communication signal and receives a wire communication signal.
The eleventh resistor R11 is used as a pull-up resistor, and the ninth capacitor C9 is used as a filter capacitor.
The DATA0 end of the MCU chip is connected with an output filter circuit, and the output filter circuit comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a tenth capacitor C10. The DATA0 end is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8, the ninth resistor R9 and the tenth capacitor C10, the other end of the eighth resistor R8 is connected to the positive terminal of the power supply, the other end of the tenth capacitor C10 is grounded, and the other end of the ninth resistor R9 is used as an output end of the wired extension communication to receive the third signal.
Similarly, the eighth resistor R8 acts as a pull-up resistor, and the tenth capacitor C10 acts as a filter capacitor.
The T2 end of the MCU chip is connected with the DE end of the 485 chip; the TX end of the MCU chip is connected with the DI end of the 485 chip, the RX end of the MCU chip is connected with the RO end of the 485 chip, and communication between the 485 chip and the MCU chip is achieved.
And the TDO/TMS/TDI end of the MCU chip is used as a program writing end of the MCU chip.
The implementation principle of the embodiment is as follows: the method comprises the steps that a wire harness communication signal is input from a DATA1 end of an MCU, a 485 communication signal is input from a TX end and an RX end of the MCU, the MCU decodes the wire harness signal according to a program to obtain DATA information of the wire harness signal, the 485 signal is also decoded to obtain DATA information of the 485 signal, the DATA information of the 485 signal is added to a reserved position of the DATA information of the wire harness signal to obtain fourth information, the fourth information is encrypted and verified to obtain third information, the third information is output from a DATA0 end of the MCU and then is transmitted to an electric vehicle instrument control circuit, and corresponding DATA information is displayed on an electric vehicle instrument through decoding of the electric vehicle instrument control circuit.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. An extension communication method for a wire-line communication of an electric vehicle is characterized in that: the method comprises the following steps of communicating an electric vehicle controller with an electric vehicle instrument and transmitting electric vehicle information to the electric vehicle instrument;
s1, receiving first information transmitted in a first protocol mode;
s2, receiving second information transmitted in a second protocol mode;
s3, converting the first information data and the second information data to obtain third information containing the first information data and the second information data;
and S4, transmitting the third information to the electric vehicle meter.
2. The method of claim 1, wherein the method comprises the steps of: and after the first information and the second information are decoded, adding the second information data to the reserved bit of the first information to obtain third information, wherein the third information corresponds to a third protocol.
3. The method of claim 1, wherein the method comprises the steps of: if the first information data comprises 15 bytes and the second information comprises 1 byte, the third information comprises 15 bytes; if the first information data includes 12 bytes and the second information includes 1 byte, the third information includes 12 bytes.
4. The method of claim 1, wherein the method comprises the steps of: the first protocol is a one-wire protocol; the second protocol is the 485 protocol, or CAN protocol.
5. The method of claim 4, wherein the method comprises the steps of: and adding the second information data to the 9 th byte of the first information to form fourth information, and encrypting and verifying the fourth information to form third information.
6. The method of claim 1, wherein the method comprises the steps of: and sending third information to the electric vehicle instrument at a certain frequency.
7. An electric motor car's an all-wire-harness extension communication device which characterized in that: the first communication module and the second communication module are respectively connected with the conversion module, the first communication module is used for transmitting a first communication signal conforming to a first protocol mode to the conversion module, the second communication module is used for transmitting second communication information conforming to a second protocol mode to the conversion module, the conversion module is used for converting the first communication signal and the second communication signal to form a third communication signal containing first communication signal data and second communication signal data, and the third communication signal is sent at a set frequency.
8. The wire-line communication extension device of the electric vehicle as claimed in claim 7, wherein: the first communication module comprises a wire communication module, and the second communication module comprises a 485 communication module or a CAN communication module.
9. The wire-line communication device of claim 8, wherein: the conversion module comprises an MCU, a first group of interfaces of the MCU are communicated with a wire communication module, a second group of interfaces of the MCU are communicated with a 485 interface or a CAN interface, and a third group of interfaces transmit third communication signals.
10. The wire-line communication device of claim 9, wherein: the MCU comprises a first group of interfaces including a DATA1 port, a second group of interfaces including a DE port, and a third group of interfaces including a DATA0 port, wherein the DATA0 port is connected with one end of a first resistor, the other end of the first resistor is connected with one end of a second resistor, a third resistor and a first capacitor, the other end of the second resistor is connected with a power supply, the other end of the first capacitor is connected with a power ground, and the other end of the third resistor is used as an output end PO; the DATA1 port is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one ends of a fifth resistor, a sixth resistor and a second capacitor, the other end of the fifth resistor is connected with a power supply, the other end of the second capacitor is connected with a power ground, and the other end of the sixth resistor is used as a first input end PI and used for transmitting a first communication signal conforming to a first protocol mode; the DE port is used as a second input end and is used for transmitting a second communication signal conforming to a second protocol mode.
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| CN112566325A (en) * | 2020-12-25 | 2021-03-26 | 杭州辰汉智能科技有限公司 | Vehicle light regulation and control device and method |
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