Electric vehicle low-speed alarm control system and method and electric vehicle

Abstract

The invention discloses an electric vehicle low-speed alarm control system and method and an electric vehicle, and belongs to the technical field of vehicles, the system comprises a vehicle body control module (BCM), a vehicle body electronic stabilization system (ESP), a central gateway and a low-speed alarm, and the output end of the vehicle body control module (BCM) is connected with the input end of the central gateway; the output end of the vehicle body electronic stability system (ESP) is connected with the input end of the central gateway; and the output end of the central gateway is connected with the input end of the low-speed alarm. The low-speed alarm is used for judging the vehicle speed signal and the turn-on or turn-off state signal of the vehicle headlight, and the alarm prompt tone is selected according to the judgment result to give an alarm prompt, so that the disturbance to surrounding residents can be reduced when the electric vehicle gives the low-speed alarm prompt at night.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular, relates to an electric vehicle low-speed alarm control system, method and electric vehicle. Background Art

[0002] Compared with traditional internal combustion engine vehicles, electric vehicles produce significantly less noise outside the vehicle when driving at low speed in pure electric mode, which makes it difficult for other road users, especially the blind and visually impaired, to detect the approach of the vehicle, which can easily lead to traffic accidents. To solve this problem, the low-speed warning control system on electric vehicles came into being.

[0003] However, when the low-speed warning control system on the current electric vehicle makes a low-speed warning prompt in a noisy environment during the day, it will disturb the rest of the surrounding residents and have a bad impact on the surrounding residents.

[0004] Patent CN112895905A discloses an electric vehicle low-speed alarm system, including a circuit protection module, a power module, a main control module and an audio output module; the circuit protection module inputs a stable DC power supply to the power module, and the power module is used to power the main control module and the audio output module; the main control module includes an MCU circuit, a CAN circuit and a FLASH circuit; the MCU circuit is used to receive vehicle conventional and network communication messages and diagnostic communication messages, send low-speed alarm system status and diagnostic communication messages, detect and diagnose all dependencies of the low-speed prompt sound system, and control the audio output module; the CAN circuit is used for message sending between the vehicle bus and the MCU circuit; the FLASH circuit is mainly responsible for storing system and vehicle fault information.

[0005] However, the technology disclosed in the above patent cannot reduce the disturbance to surrounding residents when the electric vehicle issues a low-speed alarm prompt at night. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an electric vehicle low-speed driving alarm control system and method in view of the deficiencies in the prior art, so as to achieve the purpose of reducing the disturbance to surrounding residents when the electric vehicle makes a low-speed alarm prompt at night.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides an electric vehicle low-speed alarm control system, comprising a body control module (BCM), a body electronic stability system (ESP), a central gateway and a low-speed alarm, wherein the output end of the body control module (BCM) is connected to the input end of the central gateway; the output end of the body electronic stability system (ESP) is connected to the input end of the central gateway; and the output end of the central gateway is connected to the input end of the low-speed alarm.

[0009] Furthermore, the electronic stability program (ESP) transmits a vehicle speed signal to the central gateway; the body control module (BCM) transmits a status signal of whether the vehicle headlights are turned on or off to the central gateway.

[0010] Furthermore, the central gateway transmits the vehicle speed signal and the status signal of whether the vehicle headlights are turned on or off to the low speed alarm.

[0011] Furthermore, the low speed alarm judges the vehicle speed signal and the status signal of whether the vehicle headlights are turned on or off.

[0012] Furthermore, when the low-speed alarm determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm receives a status signal that the vehicle headlights are on, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually increases from the first sound source to the second sound source for an alarm prompt; when the low-speed alarm determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm receives a status signal that the vehicle headlights are off, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually increases from the second sound source to the third sound source for an alarm prompt.

[0013] Further, when the low-speed alarm determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm receives a status signal that the vehicle headlights are on, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually decreases from the second sound source to the first sound source for an alarm prompt; when the low-speed alarm determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm receives a status signal that the vehicle headlights are off, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually decreases from the third sound source to the second sound source for an alarm prompt.

[0014] Furthermore, when the low speed alarm determines that the vehicle speed is greater than the second speed threshold, the low speed alarm does not issue an alarm prompt.

[0015] Furthermore, the first speed threshold is 20 kilometers per hour; and the second speed threshold is 30 kilometers per hour.

[0016] The present invention also provides a low-speed alarm control method for an electric vehicle, the method comprising the following steps:

[0017] S1: Transmits the vehicle speed signal to the central gateway through the electronic stability program (ESP); transmits the vehicle headlight on or off status signal to the central gateway through the body control module (BCM);

[0018] S2: Transmit the vehicle speed signal and the vehicle headlight on or off status signal to the low speed alarm through the central gateway;

[0019] S3: judging whether the vehicle speed is greater than the first speed threshold through the low speed alarm, if it is judged not to be greater than, then proceeding to S4; if it is judged to be greater than, then proceeding to S7;

[0020] S4: judging the vehicle headlight on or off status signal through the low speed alarm. If it is judged that the vehicle headlight is on, the process goes to S5; if it is judged that the vehicle headlight is off, the process goes to S6;

[0021] S5: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases from the volume of the first sound source to the volume of the second sound source to give an alarm prompt;

[0022] S6: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases from the volume of the second sound source to the volume of the third sound source for alarm prompting;

[0023] S7: judging whether the vehicle speed is greater than the second speed threshold through the low speed alarm, if it is judged not to be greater than, then proceeding to S8; if it is judged to be greater than, then proceeding to S11;

[0024] S8: judging the vehicle headlight on or off status signal through the low speed alarm, if it is judged that the vehicle headlight is on, then enter S9; if it is judged that the vehicle headlight is off, then enter S10;

[0025] S9: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the second sound source to the volume of the first sound source to give an alarm prompt;

[0026] S10: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the third sound source to the volume of the second sound source to give an alarm prompt;

[0027] S11: The low speed alarm does not give any warning.

[0028] The present invention also provides an electric vehicle, which is equipped with the above-mentioned low-speed alarm control system and uses the above-mentioned low-speed alarm control method to control the system.

[0029] The low speed alarm control system and method of the present invention have the following advantages:

[0030] (1) The low-speed alarm control system and method of the present invention can reduce the disturbance to surrounding residents when an electric vehicle issues a low-speed alarm prompt at night.

[0031] (2) Through the low-speed alarm control system and method of the present invention, the low-speed alarm prompt sound can be automatically switched between daytime and nighttime, so as to achieve different alarm prompt effects according to different situations.

[0032] (3) The present invention uses a low-speed alarm to determine the vehicle speed signal and the status signal of the vehicle headlights being turned on or off, and automatically selects an alarm tone to issue an alarm prompt based on the determination result. This has the advantage of being intelligent and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] This specification includes the following drawings, which show the following contents:

[0034] Figure 1 It is a logical structure block diagram of a low-speed alarm control system of an electric vehicle of the present invention;

[0035] Figure 2 The invention discloses a flow chart of a low-speed alarm control method for an electric vehicle.

[0036] Explanation of the reference numerals: 1. Body control module (BCM); 2. Electronic stability program (ESP); 3. Central gateway; 4. Low speed alarm. DETAILED DESCRIPTION

[0037] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0038] Figure 1 It is a logical structure block diagram of an electric vehicle low-speed alarm control system of the present invention, including a body control module (BCM) 1, a body electronic stability system (ESP) 2, a central gateway 3 and a low-speed alarm 4, wherein the output end of the body control module (BCM) 1 is connected to the input end of the central gateway 3; the output end of the body electronic stability system (ESP) 2 is connected to the input end of the central gateway 3; the output end of the central gateway 3 is connected to the input end of the low-speed alarm 4. Among them, the output end of the body control module (BCM) 1 is connected to the input end of the central gateway 3 through a CAN line; the output end of the body electronic stability system (ESP) 2 is connected to the input end of the central gateway 3 through a CAN line; the output end of the central gateway 3 is connected to the input end of the low-speed alarm 4 through a CAN line.

[0039] Figure 2The present invention is a flowchart of a low-speed alarm control method for an electric vehicle, the method comprising the following steps:

[0040] S1: Transmit the vehicle speed signal to the central gateway 3 through the electronic stability system (ESP) 2; transmit the vehicle headlight on or off status signal to the central gateway 3 through the body control module (BCM) 1; that is, the corresponding Figure 2 Specifically, the alarm tone selected by the low-speed alarm 4 in the present invention is made after judging the vehicle speed signal and the vehicle headlight on or off status signal. Therefore, the vehicle speed signal and the vehicle headlight on or off status signal are first transmitted to the central gateway 3 through the vehicle electronic stability system (ESP) 2 and the body control module (BCM) 1 respectively.

[0041] S2: Transmit the vehicle speed signal and the vehicle headlight on or off status signal to the low speed alarm 4 through the central gateway 3; Figure 2 Specifically, after the central gateway 3 receives the vehicle speed signal transmitted by the vehicle electronic stability program (ESP) 2 and the vehicle headlight on or off status signal transmitted by the body control module (BCM) 1, the central gateway 3 transmits the vehicle speed signal and the vehicle headlight on or off status signal to the low speed alarm 4.

[0042] S3: Determine whether the vehicle speed is greater than the first speed threshold through the low speed alarm 4. If it is determined not to be greater than, enter S4; if it is determined to be greater than, enter S7; that is, corresponding to Figure 2 Specifically, after the low speed alarm 4 receives the vehicle speed signal transmitted by the central gateway 3, it analyzes the vehicle speed signal to determine whether the vehicle speed is greater than the first speed threshold. If it is determined that the vehicle speed is not greater than the first speed threshold, it enters S4; if it is determined that the vehicle speed is greater than the first speed threshold, it enters S7.

[0043] S4: The low speed alarm 4 is used to judge the vehicle headlight on or off state signal. If it is judged that the vehicle headlight is on, the process goes to S5; if it is judged that the vehicle headlight is off, the process goes to S6; that is, the corresponding Figure 2 Specifically, after the low speed alarm 4 determines that the vehicle speed is not greater than the first speed threshold, the low speed alarm 4 will determine whether the vehicle headlights are on or off, that is, whether the vehicle headlights are on or off. If the low speed alarm 4 determines that the vehicle headlights are on, it will enter S5; if the low speed alarm 4 determines that the vehicle headlights are off, it will enter S6.

[0044] S5: The low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases from the first sound source volume to the second sound source volume to give an alarm prompt; that is, corresponding to Figure 2 Specifically, when the low speed alarm 4 determines that the vehicle speed is not greater than the first speed threshold and the low speed alarm 4 receives a state signal that the vehicle headlights are turned on, the low speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases from the first sound source volume to the second sound source volume to give an alarm prompt.

[0045] S6: The low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases from the volume of the second sound source to the volume of the third sound source to give an alarm prompt; that is, corresponding to Figure 2 Specifically, when the low speed alarm 4 determines that the vehicle speed is not greater than the first speed threshold and the low speed alarm 4 receives a state signal that the vehicle headlights are off, the low speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases from the second sound source volume to the third sound source volume to give an alarm prompt.

[0046] S7: Determine whether the vehicle speed is greater than the second speed threshold through the low speed alarm 4. If it is determined not to be greater than, enter S8; if it is determined to be greater than, enter S11; that is, corresponding to Figure 2 Specifically, after the low speed alarm 4 determines that the vehicle speed is greater than the first speed threshold, the low speed alarm 4 determines whether the vehicle speed is greater than the second speed threshold. If it is determined that the vehicle speed is not greater than the second speed threshold, the process proceeds to S8; if it is determined that the vehicle speed is greater than the second speed threshold, the process proceeds to S11.

[0047] S8: The low speed alarm 4 is used to judge the vehicle headlight on or off state signal. If it is judged that the vehicle headlight is on, the process goes to S9; if it is judged that the vehicle headlight is off, the process goes to S10; that is, the corresponding Figure 2 Specifically, after the low speed alarm 4 determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, the low speed alarm 4 will determine whether the vehicle headlights are on or off, that is, whether the vehicle headlights are on or off. If the low speed alarm 4 determines that the vehicle headlights are on, the process goes to S9; if the low speed alarm 4 determines that the vehicle headlights are off, the process goes to S10.

[0048] S9: The low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the second sound source to the volume of the first sound source to give an alarm prompt; that is, corresponding to Figure 2Specifically, when the low speed alarm 4 determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low speed alarm 4 receives a state signal that the vehicle headlights are turned on, the low speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the second sound source to the volume of the first sound source to give an alarm prompt.

[0049] S10: The low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the third sound source to the volume of the second sound source to give an alarm prompt; that is, corresponding to Figure 2 Specifically, when the low speed alarm 4 determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low speed alarm 4 receives a state signal that the vehicle headlights are off, the low speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the third sound source to the volume of the second sound source to give an alarm prompt.

[0050] S11: The low speed alarm 4 does not give an alarm prompt; Figure 2 Specifically, after the low speed alarm 4 determines that the vehicle speed is greater than the second speed threshold, the low speed alarm 4 does not issue an alarm prompt.

[0051] Combine the following Figure 1 and Figure 2 The working principle of the system of the present invention is introduced as follows:

[0052] First, the vehicle speed signal is transmitted to the central gateway 3 through the electronic stability program (ESP) 2, and the status signal of the vehicle headlights being turned on or off is transmitted to the central gateway 3 through the body control module (BCM) 1; secondly, after the central gateway 3 receives the vehicle speed signal transmitted by the electronic stability program (ESP) 2 and the status signal of the vehicle headlights being turned on or off transmitted by the body control module (BCM) 1, the vehicle speed signal and the status signal of the vehicle headlights being turned on or off are transmitted to the low-speed alarm 4 through the central gateway 3; finally, after the low-speed alarm 4 receives the vehicle speed signal and the status signal of the vehicle headlights being turned on or off transmitted by the central gateway 3, the vehicle speed signal and the status signal of the vehicle headlights being turned on or off are judged by the low-speed alarm 4.

[0053] When the low-speed alarm 4 determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm 4 receives a status signal that the vehicle headlights are on, the low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases in volume from the first sound source to the second sound source to perform an alarm prompt; when the low-speed alarm 4 determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm 4 receives a status signal that the vehicle headlights are off, the low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually increases in volume from the second sound source to the third sound source to perform an alarm prompt.

[0054] When the low-speed alarm 4 determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm 4 receives a status signal that the vehicle headlights are on, the low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the second sound source to the volume of the first sound source for an alarm prompt; when the low-speed alarm 4 determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm 4 receives a status signal that the vehicle headlights are off, the low-speed alarm 4 selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the third sound source to the volume of the second sound source for an alarm prompt.

[0055] When the low speed alarm 4 determines that the vehicle speed is greater than the second speed threshold, the low speed alarm 4 does not issue an alarm prompt.

[0056] Among them, the aforementioned first speed threshold is 20 kilometers per hour, and the aforementioned second speed threshold is 30 kilometers per hour.

[0057] In addition, the aforementioned first sound source volume, second sound source volume and third sound source volume are 45 decibels, 60 decibels and 75 decibels respectively, but the first sound source volume, second sound source volume and third sound source volume are not limited to 45 decibels, 60 decibels and 75 decibels, but can be set according to specific circumstances.

[0058] The present invention also provides an electric vehicle, which is equipped with the above-mentioned low-speed alarm control system and uses the above-mentioned low-speed alarm control method to control the system.

[0059] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An electric vehicle low speed alarm control system, characterized in that: It includes a body control module (BCM), an electronic stability system (ESP), a central gateway and a low-speed alarm. The output end of the body control module (BCM) is connected to the input end of the central gateway; the output end of the electronic stability system (ESP) is connected to the input end of the central gateway; the output end of the central gateway is connected to the input end of the low-speed alarm.

2. The electric vehicle low speed alarm control system as claimed in claim 1, characterized in that: The electronic stability system (ESP) transmits a vehicle speed signal to the central gateway; the body control module (BCM) transmits a status signal of whether the vehicle headlights are turned on or off to the central gateway.

3. The electric vehicle low speed alarm control system as claimed in claim 2, characterized in that: The central gateway transmits the vehicle speed signal and the status signal of whether the vehicle headlights are turned on or off to the low speed alarm.

4. The electric vehicle low speed alarm control system as claimed in claim 3, characterized in that: The low speed alarm judges the vehicle speed signal and the state signal of the vehicle headlight being turned on or off.

5. The electric vehicle low speed alarm control system as claimed in claim 4, characterized in that: When the low-speed alarm determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm receives a status signal that the vehicle headlights are on, the low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases in volume from the first sound source to the second sound source for an alarm prompt; when the low-speed alarm determines that the vehicle speed is not greater than the first speed threshold and the low-speed alarm receives a status signal that the vehicle headlights are off, the low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases in volume from the second sound source to the third sound source for an alarm prompt.

6. The electric vehicle low speed alarm control system as claimed in claim 4, characterized in that: When the low-speed alarm determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm receives a status signal that the vehicle headlights are on, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually decreases from the second sound source to the first sound source for an alarm prompt; when the low-speed alarm determines that the vehicle speed is greater than the first speed threshold but not greater than the second speed threshold, and the low-speed alarm receives a status signal that the vehicle headlights are off, the low-speed alarm selects an alarm prompt mode in which the volume of the alarm prompt sound gradually decreases from the third sound source to the second sound source for an alarm prompt.

7. The electric vehicle low speed alarm control system as claimed in claim 4, characterized in that: When the low speed alarm determines that the vehicle speed is greater than the second speed threshold, the low speed alarm does not issue an alarm prompt.

8. An electric vehicle low speed alarm control system as claimed in any one of claims 5 to 7, characterized in that: The first speed threshold is 20 kilometers per hour; the second speed threshold is 30 kilometers per hour.

9. A low speed alarm control method for an electric vehicle as claimed in any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: Transmits the vehicle speed signal to the central gateway through the electronic stability program (ESP); transmits the vehicle headlight on or off status signal to the central gateway through the body control module (BCM); S2: Transmit the vehicle speed signal and the vehicle headlight on or off status signal to the low speed alarm through the central gateway; S3: judging whether the vehicle speed is greater than the first speed threshold through the low speed alarm, if it is judged not to be greater than, then proceeding to S4; if it is judged to be greater than, then proceeding to S7; S4: judging the vehicle headlight on or off status signal through the low speed alarm. If it is judged that the vehicle headlight is on, the process goes to S5; if it is judged that the vehicle headlight is off, the process goes to S6; S5: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases from the volume of the first sound source to the volume of the second sound source to give an alarm prompt; S6: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually increases from the volume of the second sound source to the volume of the third sound source for alarm prompting; S7: judging whether the vehicle speed is greater than the second speed threshold through the low speed alarm, if it is judged not to be greater than, then proceeding to S8; if it is judged to be greater than, then proceeding to S11; S8: judging the vehicle headlight on or off status signal through the low speed alarm, if it is judged that the vehicle headlight is on, then enter S9; if it is judged that the vehicle headlight is off, then enter S10; S9: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the second sound source to the volume of the first sound source to give an alarm prompt; S10: The low-speed alarm selects an alarm prompt mode in which the alarm prompt sound gradually decreases from the volume of the third sound source to the volume of the second sound source to give an alarm prompt; S11: The low speed alarm does not give any warning.

10. An electric vehicle, characterized in that: The electric vehicle is equipped with a low-speed alarm control system as described in any one of claims 1 to 8, and the low-speed alarm control method as described in claim 9 is used to control the system.

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