Volume control method and system for battery electric buses

Abstract

A volume control method and system for battery electric buses, which method and system belong to the technical field of vehicle alarm. The method comprises: determining a reference for volume control of a vehicle on the basis of the gear of the vehicle; when the gear is a forward gear, using a vehicle motion speed as the reference for volume adjustment; and when the gear is a reverse gear, an obstacle identified by a camera being used as the reference for volume adjustment. In the present method, a voice output volume is automatically adjusted taking into account the noise volume of the surrounding environment and by means of visual devices, such as a camera, performing detection on an obstacle around a vehicle, or on the basis of the running speed of the vehicle, and thus the safety of a bus driver and surrounding pedestrians and vehicles is also improved while an alarm voice output requirement is met.

Description

A volume control method and system for pure electric buses Technical Field

[0001] The present invention relates to the technical field of vehicle alarms, and in particular to a volume control method and system for a pure electric bus. Background Art

[0002] During the driving process of pure electric buses, electric vehicles or hybrid vehicles and other new energy vehicles are increasingly used in urban transportation, logistics and transportation and other industries because of their less environmental pollution, fast acceleration, high efficiency, simple structure and wide adaptability.

[0003] However, because electric and hybrid vehicles generate very little motor noise when driven purely electrically, they are less likely to attract the attention of other road users, such as pedestrians and other drivers, at low speeds. This poses a new safety hazard. A device needs to be added to the vehicle and integrated with the backup warning system to emit a warning tone, proactively alerting pedestrians and other road users and preventing accidents.

[0004] However, the decibel value of the voice prompter is mostly fixed, or the decibel value is only adjusted according to the time period or specific geographical location, and the volume value output by the voice prompter is not adjusted according to the actual driving conditions of the vehicle.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a volume control method and system for a pure electric bus to solve the above-mentioned problem.

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

[0008] A volume control method for a pure electric bus is disclosed. The volume is emitted by a voice prompter, and a reference condition for the output volume value is determined according to the vehicle's current gear position. The reference condition is the vehicle's speed or obstacles. When the vehicle is in the forward gear, the volume output value is determined by the vehicle's speed. When the vehicle is in the reverse gear, the volume output value is determined by the obstacles detected by the visual acquisition component.

[0009] Furthermore, when the vehicle speed is less than or equal to a preset speed, the vehicle is configured to determine the output volume value according to the environmental noise value collected in real time.

[0010] Furthermore, when the output volume value is greater than a preset maximum volume value, the output is performed at the preset maximum volume value.

[0011] Furthermore, after the voice prompter outputs according to the determined volume value, obstacles around the vehicle are detected in real time through the visual acquisition component; if obstacles are detected around the vehicle, the engine simulation sound is output at the determined volume value.

[0012] Furthermore, when the visual acquisition component detects that there are obstacles around the vehicle, the vehicle is configured to determine the output volume value based on the environmental noise value collected in real time.

[0013] Furthermore, when the output volume value is greater than a preset maximum volume value, the output is performed at the preset maximum volume value; otherwise, the output volume value is determined based on the environmental noise value collected in real time.

[0014] Furthermore, when the voice prompter outputs according to the determined volume value, the output volume value is collected in real time and the working state of the voice prompter is determined according to the difference between the output volume value and the ambient noise value.

[0015] The present invention provides a volume control system for a pure electric bus, comprising:

[0016] A system controller configured to include the above-mentioned pure electric bus volume control method;

[0017] A sensing device and a voice prompter are electrically connected to the system controller; the sensing device includes a noise sensor and a visual acquisition component, the noise sensor is configured to collect noise values ​​inside and outside the vehicle, and the visual acquisition component is configured to detect obstacles around the vehicle in real time; the voice prompter is arranged in the rear area of ​​the vehicle, and is used to output preset broadcast content according to the volume output value determined by the system controller.

[0018] Furthermore, the noise sensor is arranged at the rear of the vehicle, and includes a first noise sensor and a second noise sensor. The first noise sensor is configured to collect the ambient noise value inside and outside the vehicle, and the second noise sensor is configured to collect the volume value output by the voice prompter.

[0019] Furthermore, the visual acquisition component includes multiple cameras, which are respectively arranged in the front, side and rear areas of the vehicle.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] (1) Based on the vehicle's driving state, i.e., forward or reverse, the output volume value is automatically adjusted according to the vehicle speed and the obstacle situation detected by the visual acquisition component, combined with the real-time collected ambient noise value, effectively reducing the noise impact on road users around the vehicle;

[0022] (2) While collecting the ambient noise value, the volume value of the voice prompt output is also collected. The working status of the voice prompt is judged by the difference between the two values, so that the driver can find the failure of the voice prompt in time;

[0023] (3) When the vehicle is moving forward, it is determined whether to output an engine simulation sound with the same volume output value as the voice prompt by detecting obstacles around the vehicle in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of the layout of a sensing device in an embodiment of the present invention;

[0025] FIG2 is a schematic diagram of a frame of a volume control system for a pure electric bus according to an embodiment of the present invention;

[0026] FIG3 is a flow chart of the steps of a volume control method for a pure electric bus according to an embodiment of the present invention;

[0027] 4 is a flow chart of determining an output volume value when a vehicle is in a forward gear according to an embodiment of the present invention;

[0028] FIG5 is a flow chart of determining an output volume value when a vehicle is in a reverse gear position according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] It should be noted that terms such as "first," "second," and "one" in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0030] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0032] In this embodiment, as shown in FIG1 and FIG2 , a volume control system for a pure electric bus is provided, which includes:

[0033] A system controller and a sensing device and a voice prompter electrically connected to the system controller. The system controller obtains vehicle speed and gear position signals in real time. The system controller is configured to include a volume control method for a pure electric bus.

[0034] The sensing device includes a noise sensor and a visual acquisition component. The noise sensor is located at the rear of the vehicle and includes a first noise sensor and a second noise sensor. The first noise sensor is configured to collect ambient noise levels inside and outside the vehicle, while the second noise sensor is configured to collect the volume output by the voice prompter.

[0035] The visual acquisition component includes four cameras, which are respectively set in the front, side and rear areas of the vehicle. The visual acquisition component is configured to detect obstacles around the vehicle in real time.

[0036] The voice prompter is arranged in the rear area of ​​the vehicle and is used to output preset broadcast content according to the volume output value determined by the system controller.

[0037] As shown in FIG3 , the volume control method for a pure electric bus includes the following steps:

[0038] S1. After the vehicle is powered on and ready to drive, determine the current gear position of the vehicle;

[0039] S2. When the vehicle is in a forward gear, the volume output gear is determined by the vehicle's movement speed, and when the vehicle is in a reverse gear, the volume output gear is determined by the obstacles detected by the visual acquisition component.

[0040] Specifically, as shown in Figure 4, the first case is:

[0041] When the vehicle is in forward gear, the system controller receives real-time vehicle speed signals and determines the vehicle's velocity V. When velocity V is less than or equal to 20 km / h, the vehicle may be slowing down or needing to stop at a station. In this case, the output volume value L is determined based on the real-time collected ambient noise value A1. This output volume value L can be adjusted by adding or subtracting a corresponding decibel value from ambient noise value A1. When velocity V is greater than 20 km / h, the vehicle is in normal driving and will not affect surrounding road users. The voice prompt output volume is then muted.

[0042] When the output volume value L is greater than the preset maximum volume value Lmax, the output is performed at the preset maximum volume value Lmax; otherwise, the output is performed at the originally determined output volume value L.

[0043] After the voice prompter outputs the determined volume value L, the visual acquisition component detects obstacles K around the vehicle in real time (K=0 means no obstacle, K=1 means there is an obstacle). The types of obstacles K are pedestrians, motor vehicles, and non-motor vehicles. If an obstacle K is detected around the vehicle, the engine simulation sound is output at the original determined volume value L. At this time, the vehicle is slowing down or needs to stop at a station. After the voice prompter finishes outputting the broadcast content, there may be pedestrians around the vehicle who have not noticed the content previously broadcast by the vehicle. Therefore, the vehicle outputs the engine simulation sound at low speed to remind people around the vehicle.

[0044] The second case is:

[0045] As shown in Figure 5, when the vehicle is in the reverse gear, the visual acquisition component collects information about obstacles K around the vehicle in real time. When it is determined that there is an obstacle K around the vehicle, the volume value L output by the voice prompter is determined based on the real-time collected ambient noise value A1, so as not to frighten surrounding road users. The output volume value L can be increased or decreased by a corresponding decibel value based on the ambient noise value.

[0046] When there are no obstacles K around the vehicle, the vehicle is in normal driving and will not affect surrounding road users. In this case, the voice prompt output volume is turned off. When the output volume value L is greater than the preset maximum volume value Lmax, the output is output at the preset maximum volume value Lmax. Otherwise, the output is output according to the original determined output volume value L.

[0047] The present invention automatically adjusts the output volume value based on the vehicle's driving state, i.e., forward or reverse state, according to the vehicle speed and the obstacle conditions detected by the visual acquisition component, combined with the real-time collected surrounding environmental noise value, effectively reducing the noise impact on road users around the vehicle.

[0048] The present invention also uses a second noise sensor to collect the voice prompter's volume value A2 in real time while the voice prompter is outputting at a predetermined volume value L. The second noise sensor then determines the voice prompter's operating status based on the difference between the volume value A2 and the ambient noise value A1. Specifically, if the volume difference between the two exceeds 1 decibel within 5 seconds, the voice prompter may be faulty, and the driver's attention can be promptly alerted to the problem.

[0049] In addition, the volume control system also includes an information display screen, which is electrically connected to the system controller. The information display screen can display the content broadcast by the voice prompt in real time, and receive alarm signals sent by the system controller to indicate that the voice prompt has malfunctioned, thereby alerting the user.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A method for controlling the volume of a pure - electric bus, where the volume is emitted by a voice prompt device, Characterized in that, Determine the reference conditions for outputting the volume value according to the current gear of the vehicle; the reference conditions are the vehicle's moving speed or obstacles. When in the forward gear, the volume output value is determined by the vehicle's moving speed, and when the vehicle is in the reverse gear, the volume output value is determined by the obstacles detected by the visual acquisition component.

2. A method for controlling the volume of a pure - electric bus according to claim 1, Characterized in that, When the vehicle's moving speed is less than or equal to the preset speed, the vehicle is configured to determine the output volume value according to the ambient noise value collected in real - time.

3. A method for controlling the volume of a pure - electric bus according to claim 2, Characterized in that, When the output volume value is greater than the preset maximum volume value, output with the preset maximum volume value.

4. A method for controlling the volume of a pure - electric bus according to claim 3, Characterized in that, After the voice prompt device outputs according to the determined volume value, the visual acquisition component is used to detect the obstacles around the vehicle in real - time; if an obstacle is detected around the vehicle, output the engine simulation sound with the determined volume value.

5. A method for controlling the volume of a pure - electric bus according to claim 1, Characterized in that, When the visual acquisition component detects an obstacle around the vehicle, the vehicle is configured to determine the output volume value according to the ambient noise value collected in real - time.

6. A method for controlling the volume of a pure - electric bus according to claim 5, Characterized in that, When the output volume value is greater than the preset maximum volume value, output with the preset maximum volume value, otherwise determine the output volume value based on the ambient noise value collected in real - time.

7. A method for controlling the volume of a pure - electric bus according to claim 6, Characterized in that, When the voice prompt device outputs according to the determined volume value, collect the output volume value in real - time and determine the working state of the voice prompt device according to the difference between it and the ambient noise value.

8. A pure - electric bus volume control system, Characterized in that, Comprises: A system controller, which is configured to include the pure - electric bus volume control method described in any one of claims 1 - 7; A sensing device and a voice prompt device electrically connected to the system controller; the sensing device includes a noise sensor and a visual acquisition component. The noise sensor is configured to collect the noise values inside and outside the vehicle, and the visual acquisition component is configured to detect the obstacles around the vehicle in real - time; the voice prompt device is arranged in the rear area of the vehicle, and it is used to output the preset broadcast content according to the volume output value determined by the system controller.

9. A pure - electric bus volume control system according to claim 8, Characterized in that, The noise sensor is arranged at the rear of the vehicle, and it includes a first noise sensor and a second noise sensor. The first noise sensor is configured to collect the ambient noise values inside and outside the vehicle, and the second noise sensor is configured to collect the volume value output by the voice prompt device.

10. A pure - electric bus volume control system according to claim 8, Characterized in that, The visual acquisition component includes a plurality of cameras, which are respectively arranged in the front of the vehicle, on the side of the vehicle, and in the rear area of the vehicle.

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