CN103248564A - Automobile-used gateway system - Google Patents

Abstract

The invention discloses a vehicle gateway system, comprising: a first bus, a second bus, a gateway connected to the first bus and the second bus, at least one first bus connected to the first bus A controller, and at least one second controller connected to the second bus; the gateway is configured to receive a first signal from the first bus and determine whether the first signal is from a preset If the first controller is set, it will continue to verify the validity and real-time performance of the first signal, otherwise it will send an error warning signal to the first bus and the second bus; when the verification result is that the signal is correct, it will The first signal is routed to the second controller through the second bus, otherwise an error warning signal is sent to the first bus and the second bus.

Description

Vehicle gateway system

technical field

The invention relates to the technical field of automobiles, in particular to a vehicle gateway system.

Background technique

With the rapid development of modern automotive electronics, the number of controllers in the vehicle is increasing day by day. The traditional hard-wire communication method can no longer meet such a huge communication demand. Therefore, most controllers have adopted bus communication for signal transmission. The signals that can be transmitted on a bus are not unlimited. When the bus load rate reaches a certain level, the number of buses can only be increased. Therefore, a gateway is needed as a medium for signal transmission between buses.

The main function of the traditional gateway is the transmission and routing of signals, and the controller of the vehicle analyzes the signals after receiving them. With the increase of the number of controllers on the vehicle, the signal definitions of different models are different, so the controller cannot be used in a variety of models, and the controller needs to be redesigned for different models.

Contents of the invention

In view of the above problems, the present invention provides a gateway system for vehicles. By realizing the judgment of signal validity and real-time performance at the gateway, the controller no longer needs to judge the real-time validity of the signal, so only the gateway needs to be changed for different vehicle models. Part, without redesigning the controller, can improve the versatility of the controller.

The vehicle gateway system provided by the present invention includes: a first bus, a second bus, a gateway connected to the first bus and the second bus, and at least one first controller connected to the first bus , and at least one second controller connected to the second bus; characterized in that,

The gateway is configured to receive a first signal from the first bus, and judge whether the first signal comes from a preset first controller, and if so, continue to verify the validity and real-time performance of the first signal , otherwise an error reminder signal is sent to the first bus and the second bus; when the verification result is that the signal is correct, the first signal is routed to the second controller through the second bus, otherwise an error reminder is sent signals to the first bus and the second bus.

The gateway pre-stores valid data information, sending cycle information and controller information of the first signal.

The valid data information at least includes: data range, size, data precision, signal length, offset and sign.

The gateway is also configured to record the error information of the first signal when the verification result is that the signal fails;

Wherein, the error information at least includes: the duration of the failure of the first signal, the status of the gateway, the response of the second controller and/or the power status.

The gateway first judges the real-time performance of the first signal, and then judges the validity of the first signal when the real-time judgment result is that the signal is correct; otherwise, it no longer judges the validity of the first signal, and directly sends an error A reminder signal is sent to the first bus and the second bus.

The gateway is preset with a first default value corresponding to the first signal, and sends the first default value to the first bus and the second bus when the error alert signal is sent.

The second controller is configured not to judge the validity and real-time performance of the first signal after receiving the first signal.

The system may also include an alarm indicator light connected to the gateway, the alarm indicator light receives the alarm signal and flashes; the gateway is configured to send out the alarm signal when the judgment result is that the signal fails.

By adopting the vehicle gateway system provided by the present invention, by realizing the analysis, validity and real-time judgment of the bus signal at the gateway, the controller does not need to perform similar analysis and judgment after receiving the signal forwarded by the gateway. In this way, for different car models, even if the signal definitions are different, only the software of the gateway needs to be changed, so that a large number of controllers can be adapted to various car models without making too many changes, so the controller can be improved. The versatility of the vehicle reduces the overall cost of vehicle research and development. In addition, compared with the traditional vehicle gateway system, the controller analyzes and judges the signal based on the repackaged routing of the gateway, instead of analyzing and judging the original signal. In the vehicle gateway system provided in the present invention, the gateway The original signal sent by the controller is analyzed and judged, which can improve the accuracy of judgment.

Description of drawings

Fig. 1 shows a schematic structural diagram of a gateway system according to an embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a gateway system according to another embodiment of the present invention;

Fig. 3 shows a schematic diagram of the workflow of the gateway system in the above-mentioned embodiment of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The same structures are given the same reference numerals in the drawings.

As an embodiment of the present invention, the vehicle gateway system shown in Figure 1 at least includes a gateway 103, a first bus and a second bus connected to the gateway 103, a first controller 101 connected to the first bus, and A second controller 102 connected to the second bus. Certainly, multiple buses such as a third bus and a fourth bus (not shown in FIG. 1 ) may also be connected to the gateway 103, and the first bus and the second bus are only schematically illustrated in this embodiment. Likewise, there may be multiple controllers connected to each bus, and only the first controller 101 and the second controller 102 are used for schematic illustration in this embodiment.

The first signal sent by the first controller 101 is transmitted to the second controller 102 through the first bus, the gateway 103 and the second bus in sequence. In the traditional vehicle gateway system, after the gateway 103 receives the first signal from the first bus, it performs data routing and repackaging and then sends it to the second bus to be passed to the second controller 102, and the second The controller 102 realizes judging the data validity and real-time performance of the first signal. In this embodiment, the gateway 103 is used to judge whether the first signal comes from the first controller 101, the real-timeness and validity of the first signal, so that the first signal comes from the first controller 101 and has real-time performance and validity, the first signal is repackaged and the data is routed to the second controller 102 . In this way, after receiving the first signal, the second controller 102 may no longer judge whether the first signal comes from the first controller, and whether the first signal is real-time and valid. When the judgment result of the gateway 103 is that the signal fails, it directly sends an error reminder signal to the first bus and the second bus.

By pre-storing the valid data information, transmission cycle information and controller information of the first signal in the gateway 103, after receiving the first signal, by judging whether the information contained in the first signal matches the pre-stored information Complete the judgment on the validity and real-time performance of the first signal. Specifically, by judging whether the controller information contained in the first signal is preset controller information, in this embodiment, it is judged whether the controller information contained in the first signal is the first controller 101, if yes, it is correct, Otherwise the signal fails. The sending cycle of the first signal is obtained through the sending cycle information, and whether the first signal is real-time is judged according to the time when the first signal is received. For example, the transmission cycle information is 20 seconds, if the first signal is received every 30 seconds, it indicates that the first signal is not real-time, that is, the signal is invalid. The valid data information at least includes: data range, size, data precision, signal length, offset and sign. Whether the first signal is valid is known by judging whether the data information contained in the first signal matches the preset valid data information. For example, if the preset data range of the first signal is 5-7, but the actually received data value of the first signal is 8, obviously not within the preset data range, then it is judged that the first signal is invalid.

Furthermore, a first default value is preset on the gateway 103, and the first default value is used to send to the first bus and the second bus when an error occurs in the first signal, so that the corresponding controller can A default value works to prevent system errors. Therefore, when the gateway 103 sends the error warning signal, it will also send the first default value to the first bus and the second bus, so as to prevent the vehicle from getting out of control when an error occurs due to the first signal. For example, the first signal represents the headlight turn-on signal of the vehicle, and the first default value can be set to be 1, that is, open; when the combination switch for the user to turn on the light is broken, the first signal received by the gateway 103 is wrong, so The gateway 103 sends the first default value 1 on the first bus and the second bus; the result of doing so will cause the headlights of the vehicle to remain on, even if the vehicle is driving during the day or when the user does not want to turn on the headlights subjectively, the headlights of the vehicle will remain on. Both will remain on to ensure vehicle safety.

As another embodiment of the present invention, as shown in FIG. 2 , the vehicle gateway system further includes an alarm indicator light 104 on the basis of FIG. 1 . When the gateway 103 judges that the signal is invalid, it also sends an alarm signal to the alarm indicator light 104 . The alarm prompt light 104 is flashed after receiving the alarm signal, to prompt the test personnel to have an error.

The specific workflow of the gateway 103 shown in Figure 2 is shown in Figure 3, including the following steps:

Step 201, receiving a first signal from a first bus.

Step 202, judging whether the first signal is from the first controller, if yes, proceed to step 203, otherwise proceed to step 206. The controller information of the first signal is pre-stored in the gateway 103, such as the first controller. By judging whether the controller information carried in the first signal is the same as the pre-stored controller information, the same means that the first signal comes from the first a controller.

Step 203, judging whether the first signal is real-time, if yes, proceed to step 204, otherwise proceed to step 206.

Step 204, judging whether the first signal is valid, if yes, proceed to step 205, otherwise proceed to step 206.

Step 205, repackaging the first signal and sending it to the second controller through the second bus, and the end.

Step 206, sending an error warning signal to the first bus and the second bus to inform the first controller that the first signal sent by it is wrong, and inform the second controller that the first controller is in an error state.

Step 207, record and store the error information of the first signal, which may specifically include: the duration of failure of the first signal, the state of the gateway, the response of the second controller and/or the power state. The gateway 103 can record the error information in EEPROM, preferably stored in a form readable by a diagnostic instrument, so as to facilitate later fault detection and analysis.

Step 208, send an alarm signal to the alarm indicator light, to remind the tester that an error occurs.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention. Those skilled in the art may make modifications or equivalent replacements to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. A vehicle gateway system, comprising: a first bus, a second bus, a gateway connected to the first bus and the second bus, at least one first controller connected to the first bus device, and at least one second controller connected to the second bus; characterized in that, The gateway is configured to receive a first signal from the first bus, and judge whether the first signal comes from a preset first controller, and if so, continue to verify the validity and real-time performance of the first signal , otherwise an error reminder signal is sent to the first bus and the second bus; when the verification result is that the signal is correct, the first signal is routed to the second controller through the second bus, otherwise an error reminder is sent signals to the first bus and the second bus. 2 . The vehicle gateway system according to claim 1 , wherein the gateway pre-stores valid data information, transmission cycle information and controller information of the first signal. 3 . 3. The vehicle gateway system according to claim 2, wherein the valid data information at least includes: data range, size, data precision, signal length, offset and sign. 4. The vehicle gateway system according to claim 1 or 2, wherein the gateway is further configured to record the error information of the first signal when the verification result is that the signal fails; Wherein, the error information at least includes: the duration of the failure of the first signal, the status of the gateway, the response of the second controller and/or the power status. 5. The vehicle gateway system according to claim 4, wherein the gateway first judges the real-time performance of the first signal, and then judges the validity of the first signal when the real-time judgment result is that the signal is correct. Otherwise, the validity of the first signal is no longer judged, and an error warning signal is directly sent to the first bus and the second bus. 6. The vehicle gateway system according to any one of claims 1-5, wherein the gateway is preset with a first default value corresponding to the first signal, and when sending out the error warning signal, also sending the first default value onto the first bus and the second bus. 7. The vehicle gateway system according to any one of claims 1-6, wherein the second controller is configured to no longer judge the validity and validity of the first signal after receiving the first signal. real-time. 8. The vehicle gateway system according to claim 7, further comprising an alarm indicator light connected to the gateway, and the alarm indicator light receives an alarm signal and flashes; The gateway is configured to send out the alarm signal when the judgment result is that the signal fails.

Images