Engineering machinery vehicle loudspeaker capable of intelligently adjusting volume

Abstract

The utility model relates to the technical field of vehicle loudspeakers, and discloses an engineering machinery vehicle loudspeaker capable of intelligently adjusting volume, which comprises a loudspeaker main body and a shell, and is characterized in that the shell is used for protecting internal electronic components, so that a system can adapt to a severe environment, and sealing protection is provided; and the mounting plate is used for fixing the whole loudspeaker system on the external structure of the mechanical vehicle to ensure the stability of the loudspeaker system. According to the engineering machinery vehicle loudspeaker capable of intelligently adjusting the volume, the volume can be automatically adjusted according to the real-time noise level and the vehicle state, the environment noise sensor is installed outside the shell, noise changes of a construction site can be accurately captured, data are transmitted to the circuit board, the analog-digital converter converts environment noise signals into digital signals, and then the digital signals are transmitted to the loudspeaker. And the main control MCU performs intelligent calculation, and dynamically adjusts the volume of the loudspeaker according to the noise level of the construction site.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle loudspeaker technical field, concretely is a kind of engineering machinery vehicle loudspeaker of intelligent volume adjustment. BACKGROUND

[0002] Engineering machinery vehicle is widely used in construction, mining, road maintenance and other fields, common including excavator, loader, bulldozer and crane etc., these vehicles usually run in complex working environment, and the noise is large and the working mode is changeable, so it needs to be equipped with loudspeaker for voice prompt, warning signal or communication instruction, to ensure construction safety and work efficiency.

[0003] Traditional engineering machinery vehicle loudspeaker usually adopts fixed volume design, cannot automatically adjust volume according to actual environment and vehicle running state, and this fixed volume design may lead to voice prompt unable to clearly convey in the construction environment with large noise, and may cause unnecessary noise pollution in relatively quiet environment, and the driver needs to manually adjust loudspeaker volume in different construction scenes, for example, increases volume in high-noise environment to ensure that voice instruction is heard clearly, reduces volume in night construction or quiet environment to reduce interference, however, frequent manual adjustment not only increases the operation burden of driver, but also may affect construction safety due to failure to adjust volume in time. SUMMARY

[0004] (I) technical problem solved

[0005] The utility model aims at providing a kind of engineering machinery vehicle loudspeaker of intelligent volume adjustment, to solve the problem that traditional engineering machinery vehicle loudspeaker cannot intelligently adjust volume as proposed in the above background technique.

[0006] (II) technical scheme

[0007] In order to achieve the above object, the utility model provides the following technical scheme: A kind of engineering machinery vehicle loudspeaker of intelligent volume adjustment, the engineering machinery vehicle loudspeaker of intelligent volume adjustment includes loudspeaker main body, the lower end of the loudspeaker main body is fixedly provided with support for installing loudspeaker main body, the upper end of the loudspeaker main body is connected with control panel by power cord, adjusting knob for controlling the volume size of loudspeaker main body is rotatably arranged on the control panel, the upper side of the adjusting knob is fixedly provided with indicating line, the loudspeaker main body can also be controlled volume size by intelligent adjusting component, loudspeaker main body is used to output audio signal, sound is generated by diaphragm vibration, and volume size is adjusted according to input signal, support is used to fix loudspeaker main body, so that it is stably installed on equipment, control panel is used to manually adjust the volume and other functions of loudspeaker, adjusting knob is used to adjust the gain size of audio signal, so as to change the volume of loudspeaker, indicating line is used to identify the current position of adjusting knob, help user accurately adjust volume, shell is used to protect internal electronic components, so that system can adapt to harsh environment, and sealing protection is provided, mounting plate is used to fix the entire loudspeaker system on the external structure of mechanical vehicle, to ensure its stability.

[0008] Preferably, the lower side of the loudspeaker main body is fixedly provided with a shell, and the shell is fixedly connected to the outer surface of the mechanical vehicle by a mounting plate.

[0009] Preferably, the intelligent adjusting component includes an environmental noise sensor, the environmental noise sensor is fixedly arranged inside the shell, and a portion of the environmental noise sensor is arranged on the outer surface of the shell.

[0010] Preferably, a circuit board is fixedly arranged inside the shell, a main control MCU is fixedly arranged on the circuit board, a variable gain amplifier is fixedly arranged on the circuit board, and the main control MCU 10 is of the model NordicnRF52840 Nordic.

[0011] Preferably, an analog-to-digital converter is fixedly arranged on the circuit board, a digital signal processor is fixedly arranged on the circuit board, and the analog-to-digital converter is of the model Texas Instruments ADS1115 TI.

[0012] Preferably, a filter is fixedly arranged on the circuit board, a PWM volume control module is fixedly arranged on the circuit board, the filter is of the model Murata BLT81 Murata, and the PWM volume control module is of the model Texas Instruments TPA3116D2.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、The engineering machinery vehicle loudspeaker with intelligent volume adjustment can automatically adjust the volume according to the real-time noise level and the vehicle state, the environmental noise sensor is installed outside the shell, can accurately capture the noise change of the construction site, and transmits the data to the circuit board, the analog-digital converter converts the environmental noise signal into a digital signal, then the main control MCU performs intelligent calculation, and dynamically adjusts the loudspeaker volume according to the noise level of the construction site;

[0015] 2、The engineering machinery vehicle loudspeaker with intelligent volume adjustment optimizes the audio output quality through multi-stage signal processing, the digital signal processor can perform noise reduction, equalization, volume enhancement and other optimization processing on the audio signal, the filter can effectively remove the clutter and electromagnetic interference in the audio signal, and ensure that the output sound is clear and smooth, and the variable gain amplifier can dynamically adjust the audio gain according to the requirements of different environments; BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the mechanical vehicle loudspeaker of the utility model;

[0017] Figure 2 It is a loudspeaker structure schematic view of the utility model;

[0018] Figure 3 It is a volume adjustment assembly structure schematic view of the utility model;

[0019] Figure 4 It is a structure schematic view of the intelligent adjustment assembly of the utility model;

[0020] Figure 5 It is a sectional structure schematic view of the intelligent adjustment assembly of the utility model.

[0021] In the drawing: 1, loudspeaker main body; 2, support; 3, control panel; 4, adjustment knob; 5, indication line; 6, shell; 7, mounting plate; 8, environmental noise sensor; 9, circuit board; 10, main control MCU; 11, variable gain amplifier; 12, analog-digital converter; 13, digital signal processor; 14, filter; 15, PWM volume control module. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figures 1-5The utility model provides a technical scheme: a kind of engineering machinery vehicle loudspeaker of intelligent volume adjustment, the engineering machinery vehicle loudspeaker of intelligent volume adjustment includes loudspeaker main body 1, the lower end of loudspeaker main body 1 is fixedly arranged with the support 2 for installing loudspeaker main body 1, the upper end of loudspeaker main body 1 is connected with control panel 3 by power cord, adjusting knob 4 for controlling the volume size of loudspeaker main body 1 is rotatably arranged on control panel 3, the upper side of adjusting knob 4 is fixedly arranged with indicating line 5, loudspeaker main body 1 can also control volume size by intelligent adjusting component, loudspeaker main body 1 generates magnetic field by internal voice coil driven by electric signal, and vibration is formed by interaction with fixed magnet, so that diaphragm is vibrated and air is pushed to generate sound, different frequency audio output can be realized, support 2 is used to provide structural support, the weight of loudspeaker main body is supported, and the influence of mechanical vibration is reduced, control panel 3 is used to receive the adjusting signal of user input, and it is converted into electric signal transmission to main control MCU, adjusting knob 4 changes resistance or electronic control signal by mechanical rotation, to thereby influence volume size, indicating line 5 is used to provide the visual reference of current adjustment position of knob.

[0024] The lower side of loudspeaker main body 1 is fixedly arranged with shell 6, shell 6 is fixedly connected on the outer surface of mechanical vehicle by mounting plate 7, intelligent adjusting component includes environmental noise sensor 8, environmental noise sensor 8 is fixedly arranged in the inside of shell 6, part of environmental noise sensor 8 is arranged on the outer surface of shell 6, the model of the environmental noise sensor 8 is Invensense ICS-43434, environmental noise sensor 8 is used to detect the intensity and frequency of surrounding environmental noise in real time, and analog sound wave signal is converted into electric signal, and then the sound collection accuracy of specific direction is enhanced by internal microphone array.

[0025] The inside of shell 6 is fixedly arranged with circuit board 9, main control MCU 10 is fixedly arranged on circuit board 9, variable gain amplifier 11 is fixedly arranged on circuit board 9, analog-digital converter 12 is fixedly arranged on circuit board 9, digital signal processor 13 is fixedly arranged on circuit board 9, filter 14 is fixedly arranged on circuit board 9, PWM volume control module 15 is fixedly arranged on circuit board 9, the model of main control MCU 10 is Nordic nRF52840 Nordic, the model of variable gain amplifier 11 is PGA2311

[0026] Texas Instruments, the model of the analog-to-digital converter 12 is Texas Instruments ADS1115TI, the model of the digital signal processor 13 is Qualcomm QCC5124, the model of the filter 14 is Murata BLT81 Murata, the model of the PWM volume control module 15 is Texas Instruments TPA3116D2, the circuit board 9 is used for connecting and integrating all electronic components, providing a signal transmission path, and containing power management, data processing and communication functions, so that each component works together, the main control MCU 10 receives the signal transmitted by the environmental noise sensor, and combines the preset algorithm to calculate the current environmental volume adjustment strategy, and then sends a control instruction to the variable gain amplifier and the PWM volume control module, the variable gain amplifier 11 is used to dynamically adjust the audio signal gain according to the instruction of the main control MCU, and the volume of the loudspeaker can adapt to different noise environments by controlling the amplification multiple of the input signal, the analog-to-digital converter 12 is used to convert the analog signal collected by the environmental noise sensor into a digital signal, so that the main control MCU can more accurately process noise data and improve the accuracy of signal calculation.

[0027] Working principle: when the device is working, the operator can manually adjust the volume by rotating the adjusting knob 4, at this time the rotary encoder inside the knob converts the mechanical displacement into an electrical signal and transmits it to the main control MCU 10, and the indicating line 5 fixed above the knob displays the current volume level in real time, if the intelligent adjustment mode is enabled, the environmental noise sensor 8 (sampling rate 48kHz) installed on the outside of the shell 6 will continuously collect the environmental noise spectrum, after the analog sound pressure signal is converted into a 24-bit digital signal by the analog-to-digital converter 12, the digital signal processor 13 executes a dynamic compression algorithm, analyzes the noise energy concentrated in the 200-800Hz frequency band (corresponding to the roar of the engineering machinery engine), and the main control MCU 10 immediately increases the low-frequency gain (step precision 0.1dB) through the variable gain amplifier 11 and adjusts the duty cycle of the driving signal through the PWM volume control module 15, so that the diaphragm amplitude of the loudspeaker main body 1 is synchronized to enhance, and the filter 14 performs second-order low-pass filtering (cutoff frequency 20kHz) on the engine spark interference transmitted by the power line, when manual and automatic modes coexist, the main control MCU 10 executes the instruction of the adjusting knob 4 first, realizes accurate adaptation of the volume to the environmental noise in the range of 55-110dB (error ±1.5dB), and when the system detects that the knob 4 has been operated for 10 seconds, it automatically switches back to the environmental self-adaptive mode.

[0028] Finally, it should be noted that the above is merely to illustrate the technical solutions of the present application, and is not a limitation on the scope of protection of the present application, and simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A volume intelligently adjustable work machine vehicle loudspeaker comprising a loudspeaker body (1), characterized in that: The lower end of the loudspeaker body (1) is fixedly provided with a support (2) for mounting the loudspeaker body (1), the upper end of the loudspeaker body (1) is connected with a control panel (3) through a power line, the control panel (3) is rotatably provided with an adjusting knob (4) for controlling the volume of the loudspeaker body (1), the upper side of the adjusting knob (4) is fixedly provided with an indicating line (5), and the loudspeaker body (1) can also control the volume through a smart adjusting assembly.

2. A work machine vehicle loudspeaker with intelligent volume adjustment according to claim 1, characterized in that: The lower side of the loudspeaker body (1) is fixedly provided with a shell (6), and the shell (6) is fixedly connected to the outer surface of the mechanical vehicle through a mounting plate (7).

3. A work machine vehicle loudspeaker with intelligent volume adjustment according to claim 2, characterized in that: The smart adjusting assembly comprises an environmental noise sensor (8), the inside of the shell (6) is fixedly provided with the environmental noise sensor (8), and part of the environmental noise sensor (8) is arranged on the outer surface of the shell (6).

4. The construction equipment vehicle loudspeaker with intelligent volume adjustment of claim 2, wherein: The inside of the shell (6) is fixedly provided with a circuit board (9), the circuit board (9) is fixedly provided with a main control MCU (10), and the circuit board (9) is fixedly provided with a variable gain amplifier (11).

5. A work machine vehicle loudspeaker with intelligent volume adjustment according to claim 4, characterized by: The circuit board (9) is fixedly provided with an analog-to-digital converter (12), and the circuit board (9) is fixedly provided with a digital signal processor (13).

6. A work machine vehicle loudspeaker with intelligent volume adjustment according to claim 4, characterized by: The circuit board (9) is fixedly provided with a filter (14), and the circuit board (9) is fixedly provided with a PWM volume control module (15).

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