KR20050012424A - a sound field forming system of the inside of a passenger car - Google Patents

Abstract

PURPOSE: An apparatus for forming internal sound field of a vehicle is provided to form automatically optimum sound field by controlling outputs of speakers based on according to the number and locations of passengers. CONSTITUTION: A plurality of speakers(1-5) are installed at front, rear, left, and right doors and a rear package tray, respectively. An amplifier(9) is used for amplifying audio signals and outputting amplified signals to the speakers. A plurality of passenger sensors(6a-6d) are used for sensing a boarding state of a passenger. A memory(8) is used for storing output ratios of the speakers to form optimum sound field. A microcomputer(7) is used for judging the loading state of the passenger and controlling the amplifier to operate the speakers according to the output ratios stored in the memory.

Description

Passenger car interior sound field forming device {a sound field forming system of the inside of a passenger car}

The present invention relates to an indoor sound field forming apparatus for a passenger car, and more particularly to an indoor sound field forming apparatus for an automobile in which an optimal sound field is automatically formed according to the number and position of passengers.

Among the many factors that affect the merchandise of the vehicle, in recent years, as the performance of the mechanical part is mostly improved, the interior design and the acoustic system become an important factor. As the demand for listening to music with excellent sound quality increases in the dual vehicle, interest in the acoustic system is increasing.

On the other hand, as shown in Figure 1, the car is equipped with most five speakers. That is, FL (Front Left), FR (Front Right), RL (Rear Left), RR (Rear Right) speakers (1, 2, 3, 4) mounted on the door of each seat side and the center of the rear package tray The P / Tray speaker 5 attached to the is a sound field in the room according to the relative output of these five speakers.

However, the output of the speakers is tuned such that the indoor sound field of a passenger car is usually formed in only two types according to the grade of the vehicle. That is, in the mid / low class vehicles, a sound field centering on the driver's seat (FL seat) is formed (corresponding to the case of FIG. 1), and in a high-end vehicle, a sound field centering on the VIP seat (RR seat) is formed.

Therefore, you can enjoy high-quality sound only by sitting in the driver's seat in the mid / low class cars and in the VIP seat in the luxury cars.

Therefore, the passenger who sits in another seat does not provide the optimum sound. In addition, although there is not always one passenger in the room, the position of the indoor sound field is not changed at all, and the sound field is formed as it is initially tuned, so the optimal sound field is not formed according to the number of passengers and their position. It is true.

Accordingly, the present invention has been made in order to solve the above problems, by providing an optimal sound field automatically formed according to the number and position of the occupants to provide a passenger car interior sound field forming apparatus that can always enjoy a good sound quality. Has its purpose.

1 is a view showing an example of the sound field formation of the speaker mounting position and the center of the driver's seat of the car,

2 is a view showing several cases of sound field formation according to the number of occupants and their riding positions;

3 is a block diagram of a passenger car interior sound field forming apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

1 ~ 5: Speaker, 6: Passenger detection sensor,

7: microcomputer, 8: memory,

9: amplifier.

The present invention for achieving the above object, the front and rear, right and left four doors and the speaker installed in the rear package tray, the amplifier to amplify the audio signal received from the audio device to output to each speaker, the passenger boarding of each seat Passenger detection sensors for detecting whether or not, a memory that stores the relative output ratio of each speaker to form an optimal sound field according to the boarding status, the boarding status is identified by the signal input from the passenger sensors And a microcomputer controlling the amplifier so that the output of each speaker is output according to the output ratio stored in the memory according to the current state.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Fig. 2 shows the case of sound field formation according to the number of occupants and their boarding positions. (The black dots represent the positions of the occupants, and the circles of dotted lines represent the sound field formation positions.)

As shown in (a) to (m), the number of occupants varies from one person to four cases, and the boarding position may also change as shown.

In each case, the output ratio of each speaker for forming the optimum sound field is determined by the long-term tuning experience, and the ratio is as follows.

<Output ratio of each speaker by sound field type>

Speaker sound field type FL FR RL RR P / Tray Sound field (a) One 0.5 0.8 0.3 One Sound field (b) 0.3 0.8 0.5 One One Sound field (c) 0.5 One 0.3 0.8 One Sound field (d) 0.8 0.3 One 0.5 One Sound field (e) One One 0.4 0.4 One Sound field (f) 0.4 0.4 One One One Sound field (g) One 0.5 0.8 0.5 One Sound field (h) 0.5 One 0.5 0.8 One Sound field (i) 0.8 0.5 One 0.8 One Sound field (j) 0.5 0.8 0.8 One One Sound field (k) 0.5 0.3 One 0.8 One Sound field (l) 0.3 0.5 0.8 One One Sound field (m) One One One One One

As described above, data regarding the output ratio of each speaker for forming an optimum sound field according to the occupant boarding status is input to the memory 8.

On the other hand, the present invention uses the passenger sensor 6 to determine the boarding status, that is, the number of occupants and the position of the occupants.

Passenger detection sensor 6 is the same sensor that is installed to determine whether there is a passenger in the passenger seat when judging whether or not the passenger seat airbag is deployed, using a piezoelectric element that generates an electric signal when the load is detected, On the FL, FR, RL and RR sheets.

The present invention is to determine the boarding status through the passenger sensor 6, the in-vehicle speakers (1-5) and amplifier (9), the memory (8), the passenger sensor (6) And a microcomputer 7 for controlling the amplifier 9 so that the outputs of the respective speakers 1 to 5 are made according to the data stored in the memory 8 according to the present situation.

As described above, the passenger detection sensors 6 are installed inside the seatback or cushion of the FL, FR, RL, and RR seats, respectively, and are connected to the microcomputer 7 to transmit a detection signal when a passenger is seated. .

Preferably, the microcomputer 7 and the memory 8 are integrated into one unit, and more preferably, the microcomputer 7 and the memory 8 are integrated on the instrument panel and installed on the instrument panel as in a conventional acoustic device.

The speakers 1 to 5 are existing speakers installed on the front, rear, left, and right sides of the vehicle and on the center upper surface of the package tray.

Now, the operation and effect of the present invention will be described.

When the acoustic device is operated, the microcomputer 7 receives a detection signal from the passenger detection sensors 6a, 6b, 6c, and 6d of each seat to determine the boarding status. That is, it is determined which of the various sound field formation cases is stored in the memory 8.

For example, when the detection signal is input only to the FL passenger sensor 6a, it is determined that the driver alone rides (a), and the type of sound field to be implemented is determined as the case of the sound field (a) in the output ratio table. do.

Subsequently, the amplifying action of the amplifier 9 is controlled according to the determined output ratio value FL speaker: FR speaker: RL speaker: RR speaker: P / Tray speaker = 1: 1: 0.5: 0.8: 0.3: 1.

The amplifier 9 amplifies a sound signal received from a sound device such as a tape, a CD, a DVD player, etc. according to the output ratio, and outputs the same through the speakers 1 to 5.

Therefore, a sound field is formed in the interior of the vehicle at a position as shown in FIG. 2A, so that the driver can enjoy a good sound.

As another example, if a detection signal is input from the FL passenger sensor 6a, the FR passenger sensor 6b, and the RR passenger sensor 6d, the microcomputer 7 is the driver's seat and the passenger seat, which is the case of Fig. 2 (j). , FL speaker: FR speaker: RL speaker: RR speaker: P / Tray speaker = 0.5: 0.8: 0.8: 1: 1: By controlling the amplification of the amplifier 9, a sound field is formed at a position slightly biased toward the passenger seat between the driver's seat and the VIP seat as shown, so that both the driver's seat, the passenger seat, and the VIP seat occupant can enjoy the optimum sound in the conditions. Will be.

As described above by way of example, the microcomputer 7 grasps the boarding status by the detection signals transmitted from the passenger detection sensors 6 (6a, 6b, 6c, and 6d), and inputs them to the memory 8. By controlling the amplification of the amplifier 9 by the speaker output ratio corresponding to the condition among the data, it is possible to always form an optimal sound field according to the number and position of the occupants.

As described above, according to the present invention, the optimum sound field is automatically formed according to the number and position of the occupants so that the occupants can always enjoy the best sound under the riding conditions at that time.

Claims (1)

Speakers (1 to 5) installed in the four front and rear doors and the rear package tray, an amplifier (9) for amplifying the audio signal received from the audio device and outputting to each of the speakers, detecting the occupant of each seat Passenger detection sensors (6a, 6b, 6c, 6d), a memory (8) that stores the output ratio of each speaker (1-5) to form an optimal sound field according to the boarding status, the passenger detection sensor (6a, The amplifier 9 determines the boarding status based on the signals input from 6b, 6c, and 6d, and outputs each of the speakers 1 to 5 at an output ratio stored in the memory 8 according to the checked boarding status. Passenger car indoor sound field forming device comprising a microcomputer (7) for controlling).