Warning device and vehicle

Abstract

To provide a warning device capable of warning a driver.SOLUTION: A warning device according to an embodiment of the present disclosure includes a reception device that is provided in a vehicle and includes a communication antenna capable of receiving a radio wave emitted by a wireless audio device and a reception circuit capable of detecting a radio wave intensity of the wireless audio device on the basis of the radio wave, a processing circuit capable of comparing the radio wave intensity with a predetermined threshold and performing warning determination for determining whether to give a warning to a driver of the vehicle on the basis of a result of the comparison, and a user interface capable of giving a warning to the driver on the basis of a result of the warning determination.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a warning device that warns a driver when the driver is wearing a wireless audio device, and a vehicle equipped with such a warning device. [Background technology]

[0002] In order to prevent accidents while driving, warning devices have been proposed to alert drivers. For example, Patent Document 1 discloses a technology that warns drivers when it detects poor steering grip and smartphone operation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-074944 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, wireless audio devices such as wireless earphones have become widespread. In a vehicle, it is desirable to warn the driver when the driver is wearing a wireless audio device.

[0005] It is desirable to provide a warning device and vehicle that can warn the driver. [Means for solving the problem]

[0006] A warning device according to an embodiment of the present disclosure includes a receiving device, a processing circuit, and a user interface. The receiving device is provided in a vehicle and includes a communication antenna capable of receiving radio waves emitted by a wireless acoustic device, and a receiving circuit capable of detecting the radio wave intensity of the wireless acoustic device based on the radio waves. The processing circuit is capable of comparing the radio wave intensity with a predetermined threshold and making a warning determination based on the comparison result to determine whether to issue a warning to the driver of the vehicle. The user interface is capable of warning the driver based on the result of the warning determination.

[0007] A vehicle according to an embodiment of the present disclosure includes the warning device and a driver's seat. The driver's seat has a headrest provided with a communication antenna. [Effects of the Invention]

[0008] According to the warning device and vehicle according to an embodiment of the present disclosure, it is possible to warn the driver. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram illustrating an example configuration of a vehicle according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a flowchart showing an example of the operation of the warning device shown in FIG. [Figure 3] FIG. 3 is a block diagram showing an example of the configuration of a vehicle according to a modified example. [Figure 4] FIG. 4 is a flowchart showing an example of the operation of the warning device shown in FIG. [Figure 5] FIG. 5 is a block diagram showing an example of the configuration of a vehicle according to another modified example. [Figure 6] FIG. 6 is a flowchart showing an example of the operation of the warning device shown in FIG. [Figure 7] FIG. 7 is a flowchart showing an example of the operation of a warning device according to another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0011] <Embodiment> [Configuration example] 1 shows an example of the configuration of a vehicle 1 equipped with a warning device (warning device 10) according to an embodiment. In this vehicle 1, the warning device 10 is configured to warn the driver of the vehicle 1 when the driver starts driving while wearing wireless earphones 103 (described later). The vehicle 1 includes a key device 2, an ECU (Electronic Control Unit) 3, a receiving device 11, a processing circuit 12, and a user interface 13. The receiving device 11, the processing circuit 12, and the user interface 13 constitute the warning device 10.

[0012] The key device 2 is configured to wirelessly communicate with a smart key 101 (described later) to lock or unlock the doors of the vehicle 1. When the key device 2 unlocks the doors of the vehicle 1, it supplies information indicating that the doors have been unlocked to the processing circuit 12.

[0013] The ECU 3 is configured using, for example, one or more processors, one or more memories, etc., and is configured to control the operation of the vehicle 1. In this example, the ECU 3 is configured to supply vehicle speed information regarding the vehicle speed of the vehicle 1 to the processing circuit 12.

[0014] The receiving device 11 includes a communication antenna 11a and a receiving circuit 11b.

[0015] The communication antenna 11a is configured to receive radio waves of wireless communication W emitted by a smartphone 102 and wireless earphones 103 (described later) and to supply an electric signal corresponding to the radio waves to the receiving circuit 11b. In this example, the wireless communication W is communication using Bluetooth (registered trademark). The communication antenna 11a is provided on the driver's seat 4. In this example, the communication antenna 11a is provided inside the headrest of the driver's seat 4. However, this is not limiting, and instead, the communication antenna 11a may be provided inside a portion of the backrest of the driver's seat 4 that is close to the headrest.

[0016] The receiving circuit 11b is configured to perform demodulation based on the electrical signal supplied from the communication antenna 11a. The receiving circuit 11b also detects the radio wave intensity of the radio wave received by the communication antenna 11a. The receiving circuit 11b then supplies the demodulated signal and information about the radio wave intensity to the processing circuit 12.

[0017] The processing circuit 12 is configured using one or more processors and one or more memories, and is configured to issue a warning to the driver of the vehicle 1 when the driver starts driving while wearing wireless earphones 103 (described later). The processing circuit 12 has a slave unit determination unit 121, a radio wave intensity determination unit 122, a driving determination unit 123, and a warning processing unit 124.

[0018] The slave device determination unit 121 is configured to analyze the signal demodulated by the receiving device 11 and determine the source of the radio waves received by the communication antenna 11a, thereby determining whether the radio waves are radio waves transmitted from a slave device of the wireless communication W. Specifically, in this example, the slave device determination unit 121 determines whether the radio waves are radio waves transmitted from the wireless earphone 103 of the smartphone 102 and the wireless earphone 103 that perform the wireless communication W.

[0019] The radio wave intensity determination unit 122 is configured to determine, based on the radio wave intensity detected by the receiving device 11, whether the radio wave intensity of the radio wave transmitted by the slave device of the wireless communication W is equal to or greater than a predetermined threshold.

[0020] The traveling determination unit 123 is configured to determine whether the vehicle 1 is traveling or not based on the vehicle speed information supplied from the ECU 3.

[0021] The warning processing unit 124 is configured to determine whether to issue a warning to the driver based on the determination results of the slave unit determination unit 121, the radio wave intensity determination unit 122, and the driving determination unit 123. If it is determined that a warning should be issued to the driver, the warning processing unit 124 generates warning sound data for a warning sound and warning display data for a warning display, and supplies these to the user interface 13.

[0022] The user interface 13 includes, for example, a display device such as a liquid crystal display or an organic EL (Electro Luminescence) display, a speaker, various indicators, etc. For example, the speaker outputs a warning sound based on warning sound data supplied from the processing circuit 12. Also, for example, the display device and the indicator are configured to display a warning based on warning display data supplied from the processing circuit 12. Note that in this example, the user interface 13 outputs a warning sound and displays a warning, but is not limited to this and may, for example, perform only one of these.

[0023] The driver of the vehicle 1 carries a smart key 101, a smartphone 102, and wireless earphones 103 and gets into the vehicle 1.

[0024] The smart key 101 is configured to instruct the key device 2 of the vehicle 1 to unlock or lock the doors of the vehicle 1 by wirelessly communicating with the key device 2.

[0025] The smartphone 102 is a highly functional mobile phone. The smartphone 102 can play, for example, music and audio. The smartphone 102 supplies music and audio data to the wireless earphone 103 by, for example, performing wireless communication W with the wireless earphone 103.

[0026] The wireless earphones 103 are wireless audio devices that are worn in the driver's ears and configured to convert music or audio data supplied from the smartphone 102 into sound by performing wireless communication W with the smartphone 102. The wireless earphones 103 may be, for example, canal-type, inner-ear-type, or open-ear-type. The wireless earphones 103 may also be ordinary earphones that transmit sound vibrations through the air, or bone conduction earphones that transmit sound vibrations through bones.

[0027] Here, the driver sheet 4 corresponds to a specific example of a "driver sheet" in an embodiment of the present disclosure. The receiving device 11 corresponds to a specific example of a "receiving device" in an embodiment of the present disclosure. The communication antenna 11a corresponds to a specific example of a "communication antenna" in an embodiment of the present disclosure. The receiving circuit 11b corresponds to a specific example of a "receiving circuit" in an embodiment of the present disclosure. The processing circuit 12 corresponds to a specific example of a "processing circuit" in an embodiment of the present disclosure. The user interface 13 corresponds to a specific example of a "user interface" in an embodiment of the present disclosure. The wireless earphones 103 correspond to a specific example of a "wireless acoustic device" in an embodiment of the present disclosure.

[0028] [Actions and Actions] Next, the operation and function of the vehicle 1 equipped with the warning device 10 of this embodiment will be described.

[0029] (Overview of overall operation) First, referring to FIG. 1, an overview of the overall operation of the vehicle 1 will be described. The key device 2 unlocks or locks the doors of the vehicle 1 by wirelessly communicating with the smart key 101. When the key device 2 unlocks the doors of the vehicle 1, it supplies information indicating that the doors have been unlocked to the processing circuit 12. The ECU 3 controls the operation of the vehicle 1. The ECU 3 supplies vehicle speed information of the vehicle 1 to the processing circuit 12. The communication antenna 11a of the receiving device 11 receives radio waves of the wireless communication W and supplies an electrical signal corresponding to the radio waves to the receiving circuit 11b. The receiving circuit 11b of the receiving device 11 performs a demodulation operation based on the electrical signal supplied from the communication antenna 11a. The receiving circuit 11b also detects the radio wave intensity of the radio waves received by the communication antenna 11a. The receiving circuit 11b then supplies the demodulated signal and information about the radio wave intensity to the processing circuit 12. The processing circuit 12 issues a warning to the driver of the vehicle 1 when the driver starts driving while wearing the wireless earphones 103. The user interface 13 outputs a warning sound or displays a warning based on an instruction from the processing circuit 12.

[0030] (Detailed operation) FIG. 2 shows an example of the operation of the warning device 10. As shown in FIG.

[0031] First, the processing circuit 12 checks whether or not information indicating that the door has been unlocked has been received from the key device 2 (step S101). If the information indicating that the door has been unlocked has not been received ("N" in step S101), the processing circuit 12 repeats this step S101 until the information indicating that the door has been unlocked is received.

[0032] In step S101, if the processing circuit 12 receives information that the door has been unlocked ("Y" in step S101), the slave device determination unit 121 of the processing circuit 12 determines whether or not there is radio wave from a slave device of wireless communication W, based on the signal demodulated by the receiving device 11 (step S102). Specifically, the slave device determination unit 121 analyzes the signal demodulated by the receiving device 11 and determines the source of the radio wave received by the communication antenna 11a, thereby determining whether or not this radio wave is a radio wave transmitted from a slave device of wireless communication W (the wireless earphone 103 in this example). If the slave device determination unit 121 determines that there is no radio wave from a slave device ("N" in step S102), this process ends.

[0033] If the handset determination unit 121 determines in step S102 that radio waves are being transmitted from the handset ("Y" in step S102), the radio wave intensity determination unit 122 of the processing circuit 12 determines whether the radio wave intensity of the radio waves transmitted from the handset is equal to or greater than a threshold value, based on the radio wave intensity detected by the receiving device 11 (step S103). This allows the processing circuit 12 to determine whether the driver is wearing the wireless earphones 103. That is, if radio waves are being transmitted from the handset of the wireless communication W ("Y" in step S102) and the radio wave intensity of the radio waves received by the communication antenna 11a provided on the headrest is equal to or greater than a threshold value ("Y" in step S103), the processing circuit 12 can determine that the driver is wearing the wireless earphones 103. If the radio wave intensity determination unit 122 determines that the radio wave intensity is not equal to or greater than the threshold value ("N" in step S103), this process ends.

[0034] In step S103, if the radio wave intensity determination unit 122 determines that the radio wave intensity of the radio wave transmitted from the slave unit is equal to or greater than the threshold value ("Y" in step S103), the traveling determination unit 123 of the processing circuit 12 determines whether the vehicle 1 is traveling (step S104) based on the vehicle speed information supplied from the ECU 3. If the traveling determination unit 123 determines that the vehicle 1 is not traveling ("N" in step S104), the processing returns to step S103.

[0035] In step S104, if the traveling determination unit 123 determines that the vehicle 1 is traveling ("Y" in step S104), the user interface 13 starts issuing a warning to the driver (step S105). Specifically, the warning processing unit 124 of the processing circuit 12 determines that the driver wearing the wireless earphones 103 has started driving because there is a radio wave from a slave unit of the wireless communication W ("Y" in step S102), the radio wave intensity of the radio wave received by the communication antenna 11a provided in the headrest is equal to or greater than a threshold ("Y" in step S103), and the vehicle 1 is traveling ("Y" in step S104). Therefore, the warning processing unit 124 determines that a warning should be issued to the driver. Then, the warning processing unit 124 generates warning sound data for a warning sound and warning display data for a warning display. The warning processing unit 124 generates, for example, warning sound data and warning display data that prompt the driver to remove the wireless earphones 103. The user interface 13 outputs a warning sound based on the warning sound data, and displays a warning based on the warning display data.

[0036] Next, the radio wave intensity determination unit 122 of the processing circuit 12 determines whether the radio wave intensity of the radio wave transmitted from the slave unit is less than a threshold based on the radio wave intensity detected by the receiving device 11 (step S106). If the radio wave intensity determination unit 122 determines that the radio wave intensity is not less than the threshold ("N" in step S106), the traveling determination unit 123 of the processing circuit 12 determines whether the vehicle 1 is stopped based on the vehicle speed information supplied from the ECU 3 (step S107). If it is determined that the vehicle 1 is not stopped ("N" in step S107), the processing returns to step S106.

[0037] In step S107, if the traveling determination unit 123 determines that the vehicle 1 is stopped ("Y" in step S107), the warning processing unit 124 of the processing circuit 12 determines that the driver is not driving, and the user interface 13 stops the warning (step S108). Then, the process returns to step S103.

[0038] Furthermore, if the radio wave intensity determination unit 122 determines in step S106 that the radio wave intensity is less than the threshold value ("Y" in step S106), the user interface 13 ends the warning (step S109). Specifically, because the radio wave intensity of the radio waves received by the communication antenna 11a provided in the headrest is less than the threshold value ("Y" in step S106), the warning processing unit 124 determines that the driver has removed the wireless earphones 103. Therefore, the warning processing unit 124 determines that the warning to the driver should be ended, and stops supplying the warning display data and the warning display data to the user interface 13. This causes the user interface 13 to end the warning.

[0039] This completes the process.

[0040] In this way, the warning device 10 is provided with: a receiving device 11 that is provided inside the vehicle 1 and has a communication antenna 11a that can receive radio waves emitted by the wireless acoustic device (wireless earphones 103); a receiving circuit 11b that can detect the radio wave intensity of the wireless acoustic device (wireless earphones 103) based on the received radio waves; a processing circuit 12 that can compare the radio wave intensity with a predetermined threshold and perform a warning determination that determines whether to issue a warning to the driver of the vehicle 1 based on the comparison result; and a user interface 13 that can warn the driver based on the result of the warning determination. As a result, the warning device 10 can warn the driver to remove the wireless earphones 103 if, for example, the driver forgets to remove the wireless earphones 103 and ends up wearing them unintentionally.

[0041] Furthermore, in the warning device 10, the processing circuit 12 can further determine whether the vehicle 1 is moving, and can make a warning determination when the vehicle 1 is moving. As a result, the warning device 10 can warn the driver if the driver starts driving while wearing the wireless earphones 103. That is, if the driver starts driving unintentionally with the wireless earphones 103 in their ears, they will not be able to hear sounds such as sirens and horns, making it difficult for them to grasp the situation around the vehicle 1. Therefore, in order to make it easier for the driver to grasp the situation around the vehicle 1, the warning device 10 can warn the driver to remove the wireless earphones 103.

[0042] The vehicle 1 also includes a warning device 10 and a driver's seat 4 with a headrest, and the communication antenna 11a is installed inside the headrest. This allows the communication antenna 11a to receive radio waves transmitted from a wireless communication W slave unit (wireless earphone 103) near the driver's ear, and the receiving circuit 11b can detect the radio wave intensity of the radio waves. Therefore, the warning device 10 can determine that the wireless communication W slave unit is the wireless earphone 103 based on the radio wave intensity. As a result, the warning device 10 can warn the driver to remove the wireless earphone 103.

[0043] [effect] As described above, in this embodiment, a receiving device is provided in a vehicle and has a communication antenna capable of receiving radio waves emitted by a wireless acoustic device and a receiving circuit capable of detecting the radio wave strength of the wireless acoustic device based on the received radio waves, a processing circuit capable of comparing the radio wave strength with a predetermined threshold and making a warning determination based on the comparison result to determine whether to issue a warning to the driver of the vehicle, and a user interface capable of warning the driver based on the result of the warning determination, so that the driver can be warned.

[0044] In this embodiment, the processing circuit is further capable of determining whether the vehicle is moving, and if the vehicle is moving, is capable of making a warning determination, so that a warning can be issued to the driver.

[0045] In this embodiment, the communication antenna is provided inside the headrest of the driver's seat in the vehicle, so that it is possible to determine that the wireless communication handset is a wireless earphone, and therefore to warn the driver.

[0046] [Variation 1] In the above embodiment, whether to issue a warning is determined based on whether the vehicle 1 is moving, but this is not limited to this. Instead, for example, whether to issue a warning may be determined based on the shift position of the shift lever of the vehicle 1. A vehicle 1A according to this modified example will be described in detail below.

[0047] FIG. 3 shows an example configuration of a vehicle 1A. In this example, the vehicle 1A is a vehicle equipped with an automatic transmission. The vehicle 1A is equipped with a warning device 10A. The warning device 10A is equipped with a receiving device 11, a processing circuit 12A, and a user interface 13. The processing circuit 12A has a shift position determination unit 123A. That is, while the processing circuit 12 (FIG. 1) according to the above embodiment is equipped with a travel determination unit 123, the processing circuit 12A according to this modification is equipped with a shift position determination unit 123A instead of the travel determination unit 123. In this example, the ECU 3 supplies information about the shift position of the shift lever of the vehicle 1A to the processing circuit 12A.

[0048] The shift position determination unit 123A is configured to determine whether the shift position of the shift lever of the vehicle 1A is a shift position at which the vehicle 1A can travel, based on information about the shift position of the shift lever supplied from the ECU 3. Examples of the shift position of the shift lever include P range (parking range), R range (reverse range), N range (neutral range), and D range (drive range). Examples of shift positions at which the vehicle 1A can travel include, but are not limited to, D range and R range.

[0049] 4 shows an example of the operation of the warning device 10A. The processes in steps S101 to S103, S105, and S109 are the same as those in the above embodiment (FIG. 2).

[0050] In step S103, if the radio wave intensity determination unit 122 determines that the radio wave intensity of the radio wave transmitted from the slave unit is equal to or greater than the threshold value ("Y" in step S103), the shift position determination unit 123A of the processing circuit 12A determines whether the shift position of the shift lever of the vehicle 1A is a shift position at which the vehicle 1A can travel (step S104A), based on the information about the shift position of the shift lever supplied from the ECU 3. If the shift position determination unit 123A determines that the shift lever of the vehicle 1A is not a shift position at which the vehicle 1A can travel ("N" in step S104), the processing returns to step S103.

[0051] In step S104A, if the shift position determination unit 123A determines that the shift position of the shift lever of the vehicle 1A is a shift position at which the vehicle 1A can travel ("Y" in step S104A), the user interface 13 starts to warn the driver (step S105).

[0052] Next, the radio wave intensity determination unit 122 of the processing circuit 12A determines whether the intensity of the radio waves transmitted by the slave unit is less than the threshold value (step S106A) based on the radio wave intensity of the radio waves detected by the receiving device 11. If the radio wave intensity determination unit 122 determines that the intensity of the radio waves transmitted by the slave unit is not less than the threshold value ("N" in step S106A), it repeats the process of step S106A until it determines that the intensity of the radio waves transmitted by the slave unit is less than the threshold value.

[0053] This allows the warning device 10A to make a warning determination based on the shift position of the shift lever of the vehicle 1A. In this example, if it is determined that the shift position of the shift lever of the vehicle 1A is a shift position at which the vehicle 1A can be driven, it determines whether to issue a warning to the driver. Therefore, the warning device 10A can issue a warning to the driver at the timing when the driver operates the shift lever before the vehicle starts moving.

[0054] [Variation 2] In the above embodiment, it is determined whether the vehicle 1 is moving and whether to issue a warning based on the radio wave strength of the slave device, but this is not limited to this. Instead, for example, it is also possible to make a warning determination based on the radio wave strength of the slave device regardless of whether the vehicle 1 is moving. Below, a vehicle 1B according to this modified example will be described in detail.

[0055] 5 shows an example of the configuration of vehicle 1B. In this example, vehicle 1B is equipped with a warning device 10B. Warning device 10B is equipped with a receiving device 11, a processing circuit 12B, and a user interface 13. Processing circuit 12B has a slave unit determination unit 121, a radio wave intensity determination unit 122, and a warning processing unit 124. That is, while processing circuit 12 (FIG. 1) according to the above embodiment is provided with a traveling determination unit 123, processing circuit 12B according to this modification does not include this traveling determination unit 123.

[0056] 6 shows an example of the operation of the warning device 10B. The processes in steps S101 to S103, S105, and S109 are the same as those in the above embodiment (FIG. 2).

[0057] In step S103, if the radio wave intensity determination unit 122 determines that the radio wave intensity of the radio waves transmitted from the slave unit is equal to or greater than the threshold value ("Y" in step S103), the user interface 13 starts issuing a warning to the driver (step S105). That is, in this example, the warning processing unit 124 of the processing circuit 12 determines that the driver is wearing the wireless earphones 103 when there are radio waves from the slave unit of the wireless communication W ("Y" in step S102) and the radio wave intensity of the radio waves received by the communication antenna 11a provided on the headrest is equal to or greater than the threshold value ("Y" in step S103). Then, the warning processing unit 124 determines that a warning should be issued to the driver.

[0058] Next, the radio wave intensity determination unit 122 of the processing circuit 12A determines whether the intensity of the radio waves transmitted by the slave unit is less than the threshold value (step S106B) based on the radio wave intensity of the radio waves detected by the receiving device 11. If the radio wave intensity determination unit 122 determines that the intensity of the radio waves transmitted by the slave unit is not less than the threshold value ("N" in step S106B), it repeats the process of step S106B until it determines that the intensity of the radio waves transmitted by the slave unit is less than the threshold value.

[0059] As a result, the warning device 10B can warn the driver, for example, at the timing when the driver gets into the vehicle 1B.

[0060] [Variation 3] In the above embodiment, the warning is stopped when the vehicle 1 is stopped, but this is not limited to this, and instead, for example, the warning may be continued until the driver removes the wireless earphones 103, regardless of whether the vehicle 1 is stopped or not. The warning device 10 according to this modified example will be described in detail below.

[0061] 7 shows an example of the operation of the warning device 10 according to this modification. The processes in steps S101 to S105 and S109 are the same as those in the above embodiment (FIG. 2).

[0062] After the user interface 13 starts issuing a warning in step S105, the radio wave intensity determination unit 122 of the processing circuit 12 determines whether the intensity of the radio waves transmitted by the slave unit is less than the threshold value (step S106C) based on the radio wave intensity of the radio waves detected by the receiving device 11. If the radio wave intensity determination unit 122 determines that the intensity of the radio waves transmitted by the slave unit is not less than the threshold value ("N" in step S106C), it repeats the processing of step S106C until it determines that the intensity of the radio waves transmitted by the slave unit is less than the threshold value.

[0063] As a result, the warning device 10 according to this modification can continue to warn the driver even when the vehicle 1 stops.

[0064] The present technology has been described above by giving embodiments and some modified examples, but the present technology is not limited to these embodiments and can be modified in various ways.

[0065] For example, in the above embodiment, the user interface 13 issues a warning sound and a warning display to warn the driver, but this is not limited to this. Instead, for example, a vibration device may be provided in the user interface 13, and the vibration device may vibrate to warn the driver. This vibration device may be provided, for example, in the driver's seat 4 or in the steering wheel.

[0066] For example, in the above embodiment, the wireless earphone 103 has been described as an example, but the present technology is not limited to this. The present technology can use various wireless audio devices that convert music or audio data supplied wirelessly into sound. The wireless audio device may be, for example, wireless headphones or a wireless headset. The wireless audio device may also be, for example, a wireless neck speaker. A neck speaker is a speaker that is worn around the neck or shoulder.

[0067] The effects described in this specification are merely examples and are not limiting, and other effects may also be achieved.

[0068] Furthermore, the present disclosure may take the following aspects.

[0069] (1) a receiving device provided in a vehicle, the receiving device having a communication antenna capable of receiving radio waves emitted by a wireless acoustic device, and a receiving circuit capable of detecting the radio wave intensity of the wireless acoustic device based on the radio waves; a processing circuit capable of comparing the radio wave intensity with a predetermined threshold and making a warning determination based on the comparison result to determine whether to issue a warning to the driver of the vehicle; a user interface capable of warning the driver based on the result of the warning determination; A warning device equipped with (2) The processing circuit is further capable of determining whether the vehicle is moving, and is capable of making the warning determination when the vehicle is moving. The warning device according to (1) above. (3) The processing circuit is further capable of determining whether the shift position of the shift lever of the vehicle is a shift position at which the vehicle can be driven, and is capable of making the warning determination based on the result of the determination. The warning device according to (1) above. (4) The warning device according to any one of (1) to (3), a driver's seat having a headrest provided with the communication antenna; A vehicle equipped with. [Explanation of symbols]

[0070] 1, 1A, 1B...vehicle, 2...key device, 3...ECU, 4...driver's seat, 10, 10A, 10B...warning device, 11...receiving device, 11a...communication antenna, 11b...receiving circuit, 12, 12A, 12B...processing circuit, 13...user interface, 101...smart key, 102...smartphone, 103...wireless earphone, 121...sub-unit determination unit, 122...radio wave intensity determination unit, 123...driving determination unit, 123A...shift position determination unit, 124...warning processing unit, W...wireless communication

Claims

1. a receiving device provided in a vehicle, the receiving device having a communication antenna capable of receiving radio waves emitted by a wireless acoustic device, and a receiving circuit capable of detecting the radio wave intensity of the wireless acoustic device based on the radio waves; a processing circuit capable of comparing the radio wave intensity with a predetermined threshold and making a warning determination based on the comparison result to determine whether to issue a warning to the driver of the vehicle; a user interface capable of warning the driver based on the result of the warning determination; A warning device equipped with

2. The processing circuit is further capable of determining whether the vehicle is moving, and is capable of making the warning determination when the vehicle is moving. The warning device of claim 1 .

3. The processing circuit is further capable of determining whether the shift position of the shift lever of the vehicle is a shift position at which the vehicle can be driven, and is capable of making the warning determination based on the result of the determination. The warning device of claim 1 .

4. A warning device according to any one of claims 1 to 3; a driver's seat having a headrest provided with the communication antenna; A vehicle equipped with.

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