KR20210001900A - The process for generating a noise avoidance type sound wave and a vehicle for determining the location of a device using the process - Google Patents

Abstract

The present invention relates to a method for generating a sound wave and a vehicle for determining the location of a device by using the same and, more specifically, to a method for generating a sound wave separated from noise to avoid noise and a vehicle for determining whether the location of a device is inside or outside the vehicle by receiving sound waves generated by using the same in the device when the sound waves are transmitted. According to the present invention, the vehicle for determining the location of a device comprises an input device, an output device, and a control device. According to the present invention, communication between a vehicle and a smartphone using sound waves can be effectively performed by generating sound waves separated from noise and canceling noise. An error caused by noise can be removed since noise canceling is performed by generating sound waves which periodically confront repeated noise. The communication between the vehicle and the smartphone through a sound wave can be effectively performed by removing effects caused by reflection waves to minimize errors.

Description

The process for generating a noise avoidance type sound wave and a vehicle for determining the location of a device using the process}

The present invention relates to a sound wave generating method and a vehicle for determining the location of a device using the same. More specifically, it relates to a method of generating sound waves that are distinguished from noise so as to avoid noise, and to a vehicle that determines whether the location of the device is indoors or outdoors by receiving the sound wave generated by the device when it is transmitted. .

As technologies applied to smartphones and automobiles have recently been advanced, demand for improvement of services that can be performed through communication between automobiles and smartphones is also increasing. In order to meet such demands, various technologies have been disclosed regarding sensors that transmit sound waves and ultrasonic waves. However, in the case of the prior art, as noise is generated in a communication process through sound waves between a car and a smart phone, noise and sound waves are confused, so that communication between the car and the smart phone is not performed smoothly.

Prior Document 1: US 9794753 (2017.10.17)

An object of the present invention is to provide a method for removing noise in a communication process between a device and a vehicle.

Another technical problem of the present invention is to provide a method capable of generating sound waves that are distinguished from noise in a communication process between a device and a vehicle.

Another technical problem of the present invention is to provide a method capable of removing errors due to reflected waves of sound waves in a communication process between a device and a vehicle.

According to an aspect of the present invention, by controlling an output device that generates sound waves by a control device of a vehicle, the vehicle transmits a noise-avoiding sound wave having a characteristic distinct from noise to the device, and measures the position of the device through the transmitted sound wave do.

According to the present invention, it is possible to more smoothly perform communication between a vehicle and a smartphone through sound waves by generating sound waves that are distinguished from noise and canceling noise.

According to the present invention, noise canceling is performed by generating a sound wave that is replaced with periodically repeated noise, and thus an error due to noise can be eliminated.

According to the present invention, it is possible to more smoothly perform communication between a car and a smartphone through sound waves by minimizing an error by removing the effect of the reflected wave.

1 is a diagram showing an overall schematic diagram of generating a noise avoiding sound wave by a vehicle according to an embodiment of the present invention.
2 is a diagram illustrating a first method M1 of the noise avoiding sound wave generation method according to an embodiment of the present invention.
3 is a diagram showing a second method M2 of the noise avoiding sound wave generation method according to an embodiment of the present invention.
4 is a diagram illustrating a third method (M3) of the noise avoiding sound wave generation method according to an embodiment of the present invention.
5 is a diagram illustrating a fourth method M4 of the noise avoiding sound wave generation method according to an embodiment of the present invention.
6 is a diagram illustrating a fifth method M5 of the noise avoiding sound wave generation method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments disclosed below. In addition, parts irrelevant to the present invention are omitted in the drawings in order to clearly disclose the present invention, and the same or similar reference numerals denote the same or similar components in the drawings.

Objects and effects of the present invention will become more apparent through the following detailed description, but the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, when it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing an overall schematic diagram of generating a noise avoiding sound wave by a vehicle according to an embodiment of the present invention.

Referring to FIG. 1, in the noise avoidance sound wave generation method according to the present invention, the control device 130 of the vehicle 100 performs at least one of the first method M1 to the fifth method M2, and the output device ( 120).

A request sound wave H1 is generated through the output unit 220 of the device 200, and a plurality of noises N are generated in the process of moving the generated requested sound wave H1 to the input device 110 of the vehicle 100. Included. Accordingly, the input device 110 of the vehicle 100 that is wirelessly connected to the device 200 receives both the requested sound wave H1 and the plurality of noises N.

At this time, the vehicle 100 according to the present invention generates a response sound wave H2 that is distinguished from a plurality of noises N received by the input device 110 so that it can communicate more smoothly with the device 200. do.

In detail, in the vehicle 100 according to the present invention, the control device 130 generates a response sound wave H2 having a frequency different from that of a plurality of noises N received by the input device 110. The first method (M1) of generating (C1), the second method (M2) of generating the second signal code (C2) so that the response sound wave (H2) larger than the magnitude of the plurality of noises (N) is generated (M2), the response sound wave A third method (M3) of generating a third signal code (C3) that changes at least one of the generation period and the timing of (H2), the response sound wave (H2) by measuring the reflected wave (R) of the response sound wave (H2) A fourth method (M4) of generating a fourth signal code (C4) for changing the period of (M4) and a fifth method (M5) of performing noise canceling on periodically repeated noise (N) among a plurality of noises (N). At least one of them is performed to control the output device 120 to generate a noise avoiding sound wave.

2 is a diagram illustrating a first method M1 of the noise avoiding sound wave generation method according to an embodiment of the present invention.

The first method M1 is a method of avoiding a section in which the noise N exists by generating a response sound wave H2 having a frequency different from that of the plurality of noises N received by the input device 110. To this end, the first method M1 includes a frequency selection step (S110), a first code generation step (S120), a first sound wave generation step (S130), and a confirmation step (S140).

The frequency selection step (S110) is provided to select the noise (N) from the requested sound wave (H1) and a plurality of noises (N) received by the input device (110). To this end, in the frequency selection step (S110), the control device 130 analyzes the sound waves received by the input device 110, and selects noise (N) excluding the requested sound wave (H1) separately according to each frequency. do.

The first code generation step (S120) is a step provided to distinguish the selected plurality of noises (N) from the response sound wave (H2). To this end, in the code generation step S120, the control device 130 generates a first signal code C1 for outputting a response sound wave H2 having a frequency different from that of the plurality of noises N.

In the first sound wave generation step (S130), the output device 120 generates a response sound wave (H2) having a frequency different from the plurality of noises (N) based on the first signal code (C1) received from the control device 130. This is the output step. Here, the output device 120 and the control device 130 may be connected through wireless communication such as Bluetooth communication, and the generated response sound wave H2 is formed so as not to be small in size compared to the plurality of noises N. desirable.

The checking step (S140) is a step of transmitting and receiving the response sound wave (H2) generated in the first sound wave generating step (S130) to check at least one of a size, a frequency, and a period. In detail, the response sound wave H2 generated by the output device 120 is transmitted to the input device 110, and at least one of the size, frequency, and period of the response sound wave H2 received by the input device 110 The control device 130 checks.

A pattern in which the response sound wave H2 is generated according to the first method M1 can be confirmed through FIG. 2-A.

3 is a diagram showing a second method M2 of the noise avoiding sound wave generation method according to an embodiment of the present invention.

The second method M2 is a method of increasing the size of the response sound wave H2 so that it can be more clearly distinguished from the surrounding noise N. To this end, the second method M2 includes a size selection step (S210), a second code generation step (S220), a second sound wave generation step (S230), a comparison step (S240), and an amplification step (S250).

The size selection step S210 is a step of selecting the size of the response sound wave H2 to generate the response sound wave H2 that is compared with the plurality of noises N. To this end, the control device 130 classifies a plurality of noises N received by the input device 110 according to respective sizes.

The second code generation step S220 is a step for generating a response sound wave H2 having a size larger than that of the plurality of noises N. To this end, the control device 130 outputs a response sound wave (H2) larger than the size of the smallest minimum noise (N0) among a plurality of noises (N) divided according to the size in the size selection step (S210). Generate a second signal code (C2).

The second sound wave generation step S230 is a step for forming a response sound wave H2 that is larger than the minimum noise N0. To this end, the output device 120 generates a response sound wave H2 according to the second signal code C2 received from the control device 130.

The comparison step (S240) is a step of comparing the magnitude of the minimum noise (N0) and the response sound wave (H2). In detail, the control device 130 compares the minimum noise (N0) and the response sound wave (H2) with each other, and when the size of the response sound wave (H2) is smaller than the size of the minimum noise (N0), the above-described second code generation step (S220) and the second sound wave generation step (S230) are performed again. On the other hand, when the size of the response sound wave H2 is larger than the size of the minimum noise N0, since the response sound wave H2 is separated from the noise N, an amplification step (S250) to be described later is performed.

The amplification step (S250) is a step of amplifying the size of the response sound wave (H2) in order to facilitate the distinction between the response sound wave (H2) and the noise (N). Through this, since the size of the response sound wave H2 is increased, SNR (Singnal-to-noiSe ratio) can be improved and improved.

According to the second method M2, the SNR of the response sound wave H2 is improved through FIG. 3-A.

4 is a diagram illustrating a third method (M3) of the noise avoiding sound wave generation method according to an embodiment of the present invention.

The third method M3 is provided in order to more surely avoid the noise N by changing the generation period of the response sound wave H2. To this end, the third method M3 includes a detection step S310, a third code generation step S320, and a third sound wave generation step S330.

The detection step S310 is a step of detecting periodically repeated noise N, and measuring and determining at least one of a period and a time point of occurrence of the response sound wave H2. To this end, in the detection step (S310), the control device 130 detects and selects a noise N having a periodic time and magnitude, and measures the time and period of the response sound wave H2.

In the third code generation step (S320), the control device 130 generates a third signal code (C3) for varying the generation time of the response sound wave (H2) so that it can be distinguished from the periodically repeated noise (N). to be. Through this, since the generation time of the response sound wave H2 is distinguished from the generation time of the periodic noise N, the periodic noise N and the response sound wave H2 can be more clearly distinguished.

The third sound wave generation step (S330) has the same purpose as the second sound wave generation step (S230). In detail, in the third sound wave generation step (S330), the output device 120 receives the third signal code C3 from the control device 130 to form a response sound wave H2.

According to the third method M3, it can be seen through FIG. 4-A that the generation time of the response sound wave H2 is changed.

5 is a diagram illustrating a fourth method M4 of the noise avoiding sound wave generation method according to an embodiment of the present invention.

The fourth method (M4) is a step for forming a response sound wave (H2) that can be more compared with the noise (N) by measuring at least one of the period, frequency, and magnitude of the reflected wave (R) by the response sound wave (H2). to be. To this end, the fourth method (M4) includes an evaluation step (S410) and a correction step (S420).

The fourth method (M4) to be described later is preferably performed after the first method (M1) to the third method (M3) are performed, but whether the first method (M1) to the third method (M3) are performed It can be carried out independently regardless of.

The evaluation step S410 is a step of evaluating the influence of the reflected wave R from the generated response sound wave H2. To this end, in the evaluation step (S410), it is determined whether the period of the response sound waves H2 is small and overlaps with each other or whether the interval between the response sound waves H2 is excessively large.

The correction step (S420) is a process performed after the evaluation step (S410), and is a step for improving the SNR by varying at least one of the period, frequency, and magnitude of the response sound wave H2 in the evaluation step (S410). To this end, when the interval between the response sound waves H2 is narrow in the correction step S420, the interval is increased to prevent overlapping of the response sound waves H2 and the reflected waves R. In addition, when the interval between the response sound wave H2 is wide in the correction step S420, the gap is reduced to improve the SNR of the response sound wave H2.

A change in the signal of the response sound wave H2 according to the fourth method M4 can be confirmed through FIG. 5-A.

6 is a diagram illustrating a fifth method M5 of the noise avoiding sound wave generation method according to an embodiment of the present invention.

In the fifth method (M5), when periodic noise (N) continues, active noise (N) cancellation is performed, so that the input unit 210 of the device 200 is generated by the output device 120 of the vehicle 100. This is a step to facilitate the reception of the resulting response sound wave H2. To this end, the fifth method (M5) includes a period selection step (S510) and an operation step (S520).

The period selection step S510 is a step of detecting periodic noise N. In detail, this is a step in which the control device 130 detects periodically repeated noise N among a plurality of noises N received by the input device 110 and selects a period of the corresponding noise N.

The operation step S520 is a step in which noise (N) cancellation is performed in earnest. In detail, the periodic noise (N) is listed in the calculation step (S520), and the control device 130 generates artificial noise (I) to be replaced with the selected periodic noise (N) to generate the size of the noise (N). This can be offset by reducing. Through this, the SNR of the response sound wave H2 can be further improved.

A state in which noise canceling is performed according to the fifth method M5 can be confirmed through FIG. 6-A.

Through the above-described series of steps, since the response sound wave H2 differentiated from the noise N can be formed, communication between the vehicle 100 and the device 200 can be performed more easily.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention. Such modifications, changes and additions It should be seen as falling within the scope of the above claims. In addition, if a person of ordinary skill in the art to which the present invention pertains, various substitutions, modifications, and changes can be made within the scope of the technical spirit of the present invention, so that the present invention is described by the above-described embodiments and the accompanying drawings. It is not limited.

In the exemplary system described above, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of steps, and certain steps may occur in a different order or concurrently with the steps described above. I can. In addition, those skilled in the art will appreciate that the steps shown in the flowchart are not exclusive, other steps may be included, or one or more steps in the flowchart may be deleted without affecting the scope of the present invention.

100: car 110: input device
120: output device 130: control device
200: device
H1: Request sound wave H2: Response sound wave
R: reflected wave C: signal code
N: Noise N0: Minimum noise
S110: frequency selection step S120: first code generation step
S130: first sound wave generation step S140: confirmation step
S210: size selection step S220: second code generation step
S230: second sound wave generation step S240: comparison step
S250: Amplification step
S310: detection step S320: third code generation step
S330: 3rd sound wave generation step
S410: evaluation step S420: correction step
S510: cycle selection step S520: calculation step

Claims (6)

An input device 110 for receiving at least one of a requested sound wave H1 and a plurality of noises N transmitted from the device 200;
An output device 120 for outputting a response sound wave H2 transmitted to the device 200; And
A control device 130 that divides the requested sound wave H1 and a plurality of noises N received by the input device 110 according to frequency, generates a signal code C, and controls the output device 120 Includes;
The control device 130,
A first method (M1) of generating a first signal code (C1) such that a response sound wave (H2) having a frequency different from that of the plurality of noises (N) is generated;
A second method (M2) of generating a second signal code (C2) to generate a response sound wave (H2) greater than the magnitude of the plurality of noises (N);
A third method (M3) of generating a third signal code (C3) for changing at least one of a generation period and a timing point of the response sound wave H2;
A fourth method (M4) of measuring the reflected wave (R) of the response sound wave (H2) to generate a fourth signal code (C4) for changing the period of the response sound wave (H2); And
Noise, characterized in that controlling the output device 120 by performing at least one of the fifth method (M5) of performing noise canceling on the noise (N) periodically repeated among the plurality of noises (N) An evasive sound wave generation method and a vehicle that determines the location of a device using the same.
The method of claim 1, wherein the first method (M1),
A frequency selection step (S110) of classifying a plurality of noises (N) received by the input device 110 according to respective frequencies;
A first code generation step (S120) of generating a first signal code (C1) for outputting a response sound wave (H2) having a frequency different from that of a plurality of noises (N) received by the input device (110);
A first sound wave generation step (S130) in which the output device 120 outputs a response sound wave (H2) based on the first signal code (C1) received from the control device 130; And
Noise, characterized in that the control device 130 includes a confirmation step (S140) of checking at least one of the magnitude, frequency, and period of the response sound wave H2 output by the output device 120 An evasive sound wave generation method and a vehicle that determines the location of a device using the same.
The method of claim 1, wherein the second method (M2),
A size selection step (S210) of classifying a plurality of noises (N) received by the input device 110 according to respective sizes;
A second signal code (C2) for outputting a response sound wave (H2) that is larger than the minimum noise (N0) having the smallest size among the plurality of noises (N) received by the input device 110 2 code generation step (S220);
A second sound wave generation step (S230) in which the output device 120 outputs a response sound wave (H2) based on the second signal code (C2) received from the control device (130);
A comparison step (S240) of comparing, by the control device 130, the magnitude of the minimum noise N0 and the magnitude of the response sound wave H2 output from the output device 120; And
When the size of the response sound wave H2 is greater than the size of the minimum noise N0 in the comparison step S240, the control device 130 amplifies the size of the response sound wave H2 ( A noise avoiding sound wave generation method, characterized in that it is performed including the amplification step (S250) of generating C), and a vehicle for determining the location of the device using the same.
The method of claim 1, wherein the third method (M3),
A detection step (S310) of detecting repeated noise (N) among a plurality of noises (N) received by the input device 110;
A third signal code (C3) for changing at least one of the generation period and the generation timing of the response sound wave H2 so as to have a different generation time from the periodic generation time of the noise N detected in the detection step S310 Generating a third code generating step (S320); And
And a third sound wave generation step (S330) in which the output device 120 outputs a response sound wave (H2) based on the third signal code (C3) received from the control device 130 A noise avoidance sound wave generation method and a vehicle that determines the location of a device using the same.
The method of claim 1, wherein the fourth method (M4),
An evaluation step in which the control device 130 compares at least one of the period, frequency, and magnitude of the response sound wave H2 output by the output device 120 and the reflected wave R of the response sound wave H2 (S410 ); And
Including a correction step (S420) of varying at least one of the period, frequency, and magnitude of the response sound wave (H2) and the reflected wave (R) compared in the evaluation step (S410) so as not to overlap each other. A method for generating a noise avoiding sound wave, characterized in that it is performed, and a vehicle for determining the location of a device using the same.
The method of claim 1, wherein the fifth method (M5),
A period selecting step (S510) of selecting periodically repeated noise (N) from among a plurality of noises (N) received by the input device (110); And
A noise avoiding sound wave generating method characterized in that the control device 130 comprises a calculation step (S520) of generating artificial noise (I) to be replaced with the selected periodically repeated noise (N), and A vehicle that determines the location of the device using.

Images