JPH067393U - Vehicle interior transmission characteristic correction device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a vehicle interior transmission characteristic correction device that obtains the best transmission characteristic by predicting the vehicle interior transmission characteristic from the state of the front seat and correcting it. It is a thing. [Structure] The front and rear position detection sensors 4a, 5a and the angle detection sensors 4b, 5b for detecting the backrest angle are attached to the driver's seat and the passenger's seat of the vehicle, and the detection signals from the above sensors are transmitted to the head unit. In addition to the characteristic correction circuit 8,
The signal with the corrected transmission characteristics is added to the correction signal reproducing speakers 6a ₁ and 6b ₁ via the power amplifiers 6a ₁ and 6b ₁ for the reproduction of the correction signal The transmission characteristics are corrected by the output signals from the speakers 6a and 6b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle interior transmission characteristic correction device, and more particularly to a vehicle interior transmission characteristic correction device suitable for obtaining good transmission characteristics in response to a position change of a front seat of a vehicle.

[0002]

[Prior art]

As a conventional vehicle interior transmission characteristic correction, for example, the one having a configuration as shown in FIG. 4 has been provided. In the figure, 2a and 2b are front speakers, 2a ₁ and 2b ₁ are front speaker power amplifiers, 3a and 3b are rear speakers, 3a ₁ and 3b ₁ are rear speaker power amplifiers, 7 is a head unit, and 9 is an equalizer. is there.

In the conventional vehicle-mounted sound reproduction system, since the sound output from the speaker causes disturbance in the frequency characteristic due to the reflected sound, the head unit 7, the front speakers 2a, 2b, and the rear speakers 3a, 3b serve as means for correcting the frequency characteristic. By connecting the equalizer 9 between the power amplifiers 2a ₁ and 2b ₁ for front speakers and the power amplifiers 3a ₁ and 3b ₁ for rear speakers, the output level of the power amplifier can be changed by the equalizer 9. I was going to go.

Further, as a means for recognizing the transmission characteristic in the vehicle compartment, a microphone is installed near the listening position to catch the sound from the speaker.

[0005]

[Problems to be solved by the device]

However, in the above-mentioned conventional vehicle interior transmission characteristic correction means, as shown in FIG. 4, the head unit 7 which is an acoustic source, the front speaker 2a, 2b and the front speaker power amplifier connected to the rear speaker 3a, 3b are respectively connected. I tried to connect the equalizer 9 between 2a ₁ and 2b ₁ and the power amplifier 3a ₁ and 3b ₁ for the rear speaker and adjust the output level of each power amplifier to correct the transmission characteristic. However, there is a drawback in that the degree of level adjustment due to is reflected in the reflected sound as it is, and in the same way, the transmission characteristics are disturbed and the correction effect does not appear.

Further, the recognition of the transmission characteristics by the microphone is not sufficiently achieved due to the influence of vehicle running noise and the like, and even when the vehicle is stopped before measurement, it depends on the front and rear positions of the front seat and the angle of the backrest. There was a problem that the transmission characteristics changed significantly.

The present invention has been made in view of the above points, and an object thereof is to eliminate the drawbacks of the conventional example, predict the vehicle interior transmission characteristics by the state of the front seat, and correct the transmission characteristics. In order to obtain the best transmission characteristics by performing the above, there is provided a vehicle interior transmission characteristics correction device.

[0008]

[Means for Solving the Problems]

 The vehicle interior transmission characteristic correction device of the present invention detects forward and backward movements in the vehicle passenger seat and passenger seat in a vehicle interior sound reproduction system having a speaker mounted on the vehicle front door or dashboard. And a sensor for detecting the angle of the backrest, and a correction device for inputting a signal from the sensor and a speaker for reproducing the signal from the correction device are provided.

Further, a speaker for reproducing a signal from the correction device is arranged above the dashboard and in the vicinity of the front window.

Further, a speaker for reproducing a signal from the correction device is arranged near the ears of the driver's seat and the passenger's seat.

[0011]

[Action]

 According to the present invention, in a vehicle interior sound reproduction system having a speaker mounted on a front door of a vehicle or a dashboard, a sensor for detecting forward / backward movement and a backrest are provided in a seat of a vehicle and a passenger seat. A sensor that detects the angle of the sensor, a correction device that inputs the signal from the sensor, and a speaker that reproduces the signal from the correction device, and the speaker is placed above the dashboard and near the front window. Since it was placed near the ears of the driver's seat and passenger's seat, the position of the front seat was detected by the sensor provided on the front seat, and the correction characteristics were stored in advance from the detected signal. The original signal is corrected by the correction device, and it is reproduced from the correction signal reproduction speaker other than the main speaker arranged at the above position. Signal reproduced by the disturbance of the transmission characteristic is corrected so that the desired characteristics can be obtained.

[0012]

【Example】

 An embodiment of a vehicle interior transmission characteristic correction device according to the present invention will be described with reference to FIGS. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is an embodiment of the present invention, which is a top view of a vehicle showing an arrangement of speakers and sensors in a company room, and FIG. 2 is an embodiment of the present invention, which is an arrangement of speakers and sensors in the vehicle interior. FIG. 3 is a side view of the vehicle, and FIG. 3 is a configuration block diagram showing an embodiment of the present invention.

In the figure, 1 is a sedan type vehicle, 2 is a front door, 3 is a rear tray, 4 is a driver seat, 4a and 5a are front and rear position detecting sensors, 4b and 5b are angle detecting sensors, and 5 is an assistant. A seat, 6 is a dashboard, 6a and 6b are correction signal reproduction speakers, 6a ₁ and 6b ₁ are correction signal reproduction speaker power amplifiers, and 8 is a transmission characteristic correction circuit.

As for the arrangement of the speakers in the vehicle compartment, the front speakers 2a, 2b and the rear speakers 3a, 3b are normally attached to the front door 2 and the rear tray 3, respectively, and the correction signal reproducing speakers 6a, 6b are also mounted. It is provided on the board 6. Further, front and rear position detecting sensors 4a and 5a for detecting the front and rear positions of the seat are provided in the driver's seat 4 and the passenger seat 5, respectively, and their angles are detected at the root of the backrest of the seat. Angle detection sensors 4b and 5b are provided.

As shown in FIG. 3, the speakers and sensors arranged at the above-mentioned positions are connected to the front speaker power amplifier 2a from the head unit 7 which is an acoustic source to the front speakers 2a and 2b and the rear speakers 3a and 3b, respectively. ₁ , 2b ₁ and the power amplifiers 3a ₁ , 3b ₁ for rear speakers are connected, and further, the power amplifiers 6a ₁ , 6b ₁ for speaker for correction signal reproduction from the head unit 7 via the transmission correction circuit 8 are speakers for correction signal reproduction. It is connected to 6a and 6b.

Further, the transmission correction circuit 8 is connected with signals from the front and rear position detecting sensors 4a and 5a and the angle detecting sensors 4b and 5b.

In the transmission correction operation of the vehicle interior transmission characteristic correction device configured as described above, signals from the head unit 7 are transmitted to the front speakers 2a, 2b and the rear speakers 3a, 3b by the front speaker power amplifiers 2a ₁ , 2b. ₁ and the power amplifiers 3a ₁ and 3b ₁ for the rear speaker and are also input to the transmission characteristic correction circuit 8.

At this time, the transmission characteristics from the front speakers 2a, 2b and the rear speakers 3a, 3b are disturbed by reflections and the like, but even if the positions of the speakers themselves are fixed, they change depending on the states of the driver's seat 4 and the passenger seat 5. , Constant correction is not enough.

Therefore, the detection signals from the front and rear position detection sensors 4a and 5a and the angle detection sensors 4b and 5b for detecting the states of the driver seat 4 and the passenger seat 5 are input to the transmission characteristic correction circuit 8. As a result, the optimum correction signal can be obtained from the transmission characteristic correction circuit 8.

That is, in the transmission characteristic correction circuit 8, a value for correcting the characteristic change due to the state of the front seat is preset by a DSP (DIGITAL SIGNAL PROCESSOR) or the like, and the front and rear position detection sensors 4a, An appropriate value is output as a correction signal according to the detection signals from 5a and the angle detection sensors 4b and 5b.

When the correction signal output from the transmission characteristic correction circuit 8 is applied to the correction signal reproducing speakers 6a and 6b through the correction signal reproducing speaker power amplifiers 6a ₁ and 6b ₁ , the front speaker 2a and 6b Disturbances in the transmission characteristics of the signals reproduced by 2b and the rear speakers 3a, 3b can be corrected by the correction signals from the correction signal reproducing speakers 6a, 6b to obtain the desired transmission characteristics.

The correction signal reproduction speakers 6a and 6b are installed at positions where the transmission characteristics from themselves are not disturbed by reflected waves. In this embodiment, they are installed at the corners of the front window and the dashboard 6. It may be installed near the ears of the driver's seat 4 and the passenger seat 5.

[0023]

[Effect of device]

 The vehicle interior transmission characteristic correction device according to the present invention has the following effects because it is configured as described above. Since the front and rear position detection sensors and angle detection sensors attached to the driver's seat and passenger's seat enable the status of the driver's seat and passenger's seat to be comprehended, changes in transmission characteristics caused by the conditions of both seats can be corrected. Even if the driver changes the seat position or the passenger seat changes the backrest angle, it is possible to maintain good transmission characteristics at all times. Moreover, it has the excellent features that it can be implemented easily because the mounting positions of the conventional front and rear speakers are not changed.

[Brief description of drawings]

FIG. 1 is an embodiment of the present invention and is a top view of a vehicle showing an arrangement of speakers and sensors in a vehicle compartment.

FIG. 2 is an embodiment of the present invention and is a view of the arrangement of speakers and sensors in the vehicle compartment as seen from the side of the vehicle.

FIG. 3 is a configuration block diagram showing an embodiment of the present invention.

FIG. 4 is a block diagram of a configuration in which a transmission characteristic in a vehicle interior of a conventional example is corrected.

[Explanation of symbols]

1 Sedan type vehicle 2 Front door 2a, 2b Front speaker 2a ₁ , 2b ₁ Power amplifier for front speaker 3 Rear tray 3a, 3b Rear speaker 3a ₁ , 3b ₁ Power amplifier for rear speaker 4 Driver's seat 4a, 5a For front and rear position detection Sensors 4b, 5b Angle detection sensor 5 Passenger seat 6 Dashboard 6a, 6b Correction signal reproduction speaker 6a ₁ , 6b ₁ Correction signal reproduction speaker power amplifier 7 Head unit 8 Transmission characteristic correction circuit

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location H04S 5/02 8421-5H 7/00 F 8421-5H

Claims (3)

[Scope of utility model registration request] 1. In a vehicle interior sound reproduction system having a speaker mounted on a front door or dashboard of a vehicle, a sensor for detecting forward and backward movement and a backrest angle are provided on a driver's seat and a passenger's seat of the vehicle. An in-vehicle transmission characteristic correction device, comprising: a sensor for detecting, a correction device for inputting a signal from the sensor, and a speaker for reproducing a signal from the correction device. 2. The vehicle interior transmission characteristic correction device according to claim 1, wherein a speaker for reproducing a signal from the correction device is arranged at an upper part of the dashboard and near the front window. 3. The vehicle interior transmission characteristic correction device according to claim 1, wherein a speaker that reproduces a signal from the correction device is arranged in the vicinity of the ears of the driver's seat and the passenger's seat.