Vehicle-mounted active sound box

Abstract

The invention relates to the technical field of vehicle-mounted active sound boxes, in particular to a vehicle-mounted active sound box, which is characterized in that the side surface of an active sound box body is rotatably connected with an adjusting knob, the outer surface of the active sound box body is provided with an interface circuit unit, and an inner groove of the active sound box body is connected with a loudspeaker unit; the outer surface of the active loudspeaker box body is connected with a power supply unit. According to the invention, through an audio power amplification function, an audio signal sent by a host can be amplified, and a loudspeaker is pushed to emit a high-sound-level sound signal (alarm sound); the ambient noise around the active loudspeaker box can be detected by detecting the ambient sound; through adaptive volume control, the size of the audio output volume of the active loudspeaker box can be automatically adjusted according to different sizes of environmental noise, and when the environmental noise is small, the volume is reduced, and when the environmental noise is large, the volume is increased.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted active speakers, in particular to a vehicle-mounted active speaker. Background Art

[0002] The vehicle-mounted active speaker is a vehicle-mounted audio warning audio terminal, which is mainly used for audio warning broadcasting in the car.

[0003] The current vehicle-mounted active speakers cannot adjust the volume according to the surrounding noise, so that the driver cannot hear the alarm signal in time, affecting the driver's driving of the vehicle. In addition, the current vehicle-mounted active speakers on the market have a complex structure, resulting in their heavy weight and poor anti-interference ability. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle-mounted active speaker to solve the problem proposed in the above background technology that the volume cannot be adjusted according to the surrounding noise, so that the driver cannot hear the alarm signal in time, affecting the driver's driving of the vehicle, and the vehicle-mounted active speakers currently on the market have a complex structure, resulting in their heavy weight and poor anti-interference ability.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vehicle-mounted active speaker, comprising an active speaker body, a side of the active speaker body being rotatably connected to an adjustment knob, an outer surface of the active speaker body being provided with an interface circuit unit, an inner groove of the active speaker body being installed and connected to a speaker unit, and the outer surface of the active speaker body being provided with a power supply unit.

[0006] Preferably, the active speaker body is mainly composed of a shell, a speaker unit, a power supply unit, an audio sensor, a digital audio processing unit, an audio amplification unit, an interface circuit unit, a socket and other parts.

[0007] Preferably, the interface circuit unit interface selects an RS485 interface, and the interface circuit unit interface is a circular interface, and its function is that the digital audio signal input through the RS485 interface first undergoes level conversion and is converted into a TIL level, and the digital audio signal input through the RS485 interface first undergoes level conversion and is converted into a TIL level, and is input to the CPU, the audio sensor detects the environmental noise, and performs AD conversion and encoding through the audio codec, and is compiled into the CPU; the audio sensor detects the environmental noise, and performs AD conversion and encoding through the audio codec, and the encoded noise is analyzed by the CPU, and according to the size of the environmental noise, the audio decoder is controlled to analyze the encoded noise of the input by the RS The digital audio signal input by the RS485 interface is first level-converted and converted to TIL level, and the amplitude of the input alarm audio is adjusted. The adjusted encoded audio is sent to the power amplifier unit through D / A to drive the speaker to make a sound, which makes the hardware and software of the digital interface simpler and helps to reduce the cost and development difficulty of the product; the interface mode is a universal serial communication mode, which is convenient for interface connection; the RS485 interface has a strong anti-interference ability and a high communication distance, which makes it convenient to transmit data; the input audio data can be used directly without conversion.

[0008] Preferably, the active speaker body is square in shape, and the shell and cover plate of the active speaker body are both made of aluminum alloy. The function is that the shell and the cover plate are both made of aluminum alloy, which is light in weight. At the same time, the shell is reinforced to ensure the necessary installation strength and depth while all the excess parts are cut. The cover plate is appropriately reduced in weight while ensuring the strength. The shell is processed by integrated milling, with good integrity and stable size. The shell wall is 4m thick, with screw holes at the four corners, and has good impact and vibration resistance. The shell has a good shielding effect, and the mesh cover between the speaker and the sound outlet of the shell is made of a material with good shielding effect, which can ensure the anti-interference ability of the active speaker.

[0009] Preferably, the speaker unit is installed and connected inside the active speaker body. The speaker unit is circular in shape and consists of a vibration system, a basin system, and a magnetic circuit system. Its function is to ensure that the speaker unit meets basic parameters such as weight, sensitivity, and reliability, so that the speaker unit has the advantages of low distortion, good sound quality, high output sound pressure level, stable performance, reliable structure, easy installation, moisture-proof and vibration-resistant.

[0010] Preferably, the power supply voltage of the power supply unit adopts a 24V vehicle-mounted power supply, which is composed of a power filter, a DC / DC unit, an LDO unit and a filtering circuit to supply power to each power-consuming unit. Its function is that the sound pressure generated by the active speaker is large, and therefore the required power is high. The power supply voltage adopts a 24V vehicle-mounted power supply, and a variety of filtering measures such as RC and LC are adopted in the design of the power supply part to ensure the electromagnetic compatibility of the power supply part and not be affected by high-frequency interference.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. Through the audio power amplification function, the audio signal sent by the host can be amplified to drive the speaker to emit a high-level sound signal (alarm sound); by detecting the ambient sound, the ambient noise around the active speaker can be detected; through adaptive volume control, the audio output volume of the active speaker can be automatically adjusted according to the size of the ambient noise. When the ambient noise is small, the volume is reduced, and when the ambient noise is large, the volume is increased.

[0013] 2. The shell and cover of the active speaker body 1 are made of aluminum alloy material, which is light in weight. At the same time, the shell is reinforced to ensure the necessary installation strength and depth while reducing all excess parts. The cover is appropriately reduced in weight while ensuring strength. The shell is processed by integrated milling, with good integrity and stable size. The shell wall is 4m thick and screw holes are left at the four corners, which has good impact and vibration resistance. The shell has a good shielding effect, and the mesh cover between the speaker and the shell sound outlet is made of a material with good shielding effect, which can ensure the anti-interference ability of the active speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front perspective schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic plan view of the structure of the present invention;

[0016] Figure 3 It is a side plan view schematic diagram of the structure of the present invention;

[0017] Figure 4 For the present invention Figure 1 A three-dimensional schematic diagram of the structure of the speaker unit inside the active speaker body;

[0018] Figure 5 is a principle block diagram of the interface circuit unit of the present invention;

[0019] Figure 6 It is a principle block diagram of the power supply unit of the present invention.

[0020] In the figure: 1. Active speaker body; 3. Adjustment knob; 4. Interface circuit unit; 5. Speaker unit. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-6 , an embodiment provided by the present invention:

[0023] A vehicle-mounted active speaker comprises an active speaker body 1, a side of the active speaker body 1 is rotatably connected to an adjustment knob 3, an outer surface of the active speaker body 1 is provided with an interface circuit unit 4, an inner groove of the active speaker body 1 is installed with a speaker unit 5, and the outer surface of the active speaker body 1 is provided with a power supply unit.

[0024] Furthermore, the active speaker body 1 is mainly composed of a shell, a speaker unit 5, a power supply unit, an audio sensor, a digital audio processing unit, an audio amplification unit, an interface circuit unit 4, a socket and other parts.

[0025] Furthermore, the interface circuit unit 4 interface selects an RS485 interface. The interface circuit unit 4 interface is a circular interface. Its function is that the digital audio signal input through the RS485 interface first undergoes level conversion and is converted into a TIL level. The digital audio signal input through the RS485 interface first undergoes level conversion and is converted into a TIL level and is input into the CPU. The audio sensor detects the environmental noise, performs AD conversion and encoding through the audio codec, and is compiled into the CPU; the audio sensor detects the environmental noise, performs AD conversion and encoding through the audio codec, and the encoded noise is analyzed by the CPU, and according to the size of the environmental noise, the audio decoder is controlled to analyze the noise after the code is input by the RS The digital audio signal input by the RS485 interface is first level-converted and converted to TIL level, and the amplitude of the input alarm audio is adjusted. The adjusted encoded audio is sent to the power amplifier unit through D / A to drive the speaker to make a sound, which makes the hardware and software of the digital interface simpler and helps to reduce the cost and development difficulty of the product; the interface mode is a universal serial communication mode, which is convenient for interface connection; the RS485 interface has a strong anti-interference ability and a high communication distance, which makes it convenient to transmit data; the input audio data can be used directly without conversion.

[0026] Furthermore, the active speaker body 1 is square in shape, and the shell and cover of the active speaker body 1 are made of aluminum alloy. The shell and cover are made of aluminum alloy, which is light in weight. At the same time, the shell is reinforced to ensure the necessary installation strength and depth while all the excess parts are cut. The cover is appropriately reduced in weight while ensuring the strength. The shell is processed by integrated milling, with good integrity and stable size. The shell wall is 4m thick and screw holes are left at the four corners, which has good impact and vibration resistance. The shell has a good shielding effect, and the mesh cover between the speaker and the sound outlet of the shell is made of a material with good shielding effect, which can ensure the anti-interference ability of the active speaker.

[0027] Furthermore, the speaker unit 5 is installed and connected inside the active speaker body 1. The speaker unit 5 is circular in shape. The speaker unit 5 consists of a vibration system, a basin system, and a magnetic circuit system. Its function is to ensure that the speaker unit 5 meets the basic parameters such as weight, sensitivity, and reliability, so that the speaker unit 5 has the advantages of small distortion, good sound quality, high output sound pressure level, stable performance, reliable structure, easy installation, moisture-proof and vibration-resistant.

[0028] Furthermore, the power supply voltage of the power supply unit adopts a 24V vehicle power supply, which is composed of a power filter, a DC / DC unit, an LDO unit and a filtering circuit to supply power to each power-consuming unit. Its function is that the sound pressure generated by the active speaker is relatively large, and therefore a higher power is required. The power supply voltage adopts a 24V vehicle power supply, and a variety of filtering measures such as RC and LC are used in the design of the power supply part to ensure the electromagnetic compatibility of the power supply part and to prevent it from being interfered with by high-frequency interference.

[0029] Furthermore, the output sound pressure of 01 is 105dB±3dB (input (1+0.1)Vrms / 1kHz sinusoidal signal, 1m); the frequency response range is 300Hz-3400Hz; the overall dimensions are 175mm (width) x 130mm (height) x 85mm (depth); (excluding socket), and the speaker model is YD103-60a round electric type.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A vehicle-mounted active speaker, comprising an active speaker body (1), characterized in that: The side of the active speaker body (1) is rotatably connected to an adjusting knob (3), the outer surface of the active speaker body (1) is provided with an interface circuit unit (4), the inner groove of the active speaker body (1) is installed with a speaker unit (5), and the outer surface of the active speaker body (1) is provided with a power supply unit.

2. The vehicle-mounted active speaker according to claim 1, characterized in that: The active speaker body (1) is mainly composed of a shell, a speaker unit (5), a power supply unit, an audio sensor, a digital audio processing unit, an audio amplification unit, an interface circuit unit (4), a socket and other parts.

3. The vehicle-mounted active speaker according to claim 1, characterized in that: The interface of the interface circuit unit (4) is an RS485 interface, and the interface of the interface circuit unit (4) is a circular interface.

4. The vehicle-mounted active speaker according to claim 3, characterized in that: The active speaker body (1) is in a square shape, and the shell and cover plate of the active speaker body (1) are both made of aluminum alloy material.

5. The vehicle-mounted active speaker according to claim 2, characterized in that: The speaker unit (5) is installed and connected inside the active sound box body (1); the speaker unit (5) is circular in shape and consists of a vibration system, a basin frame system, and a magnetic circuit system.

6. The vehicle-mounted active speaker according to claim 5, characterized in that: The power supply voltage of the power supply unit adopts a 24V vehicle-mounted power supply, which is composed of a power filter, a DC / DC unit, an LDO unit and a filter circuit to supply power to each power-consuming unit.

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