JP2015213272A - Hands-free speech communication device, and interference radio wave control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hands-free speech quality from being deteriorated, even while suppressing a speech with a mobile phone held by a hand.SOLUTION: A hands-free speech communication device is connected to a mobile phone, outputs a voice that is received from the outside of a vehicle by the mobile phone, from a speaker of the vehicle and transmits the voice collected by a microphone of the vehicle to the mobile phone. An interference wave interfering a communication between the outside of the vehicle and the mobile phone is outputted within a range around a driver's seat. On the basis of a result of communication by communication means for communicating with the mobile phone, it is determined whether the mobile phone is connected to the hands-free speech communication device and in the case where it is determined that the mobile phone is being connected to the hands-free speech communication device, the output of the interference wave is stopped.

Description

  The present invention relates to a hands-free call technology capable of making a call without holding a mobile phone in a vehicle.

  In recent years, with the widespread use of mobile phones, the number of drivers who make a phone call while holding a mobile phone while driving is increasing. Such an action is regarded as a problem from the viewpoint of safety because the handle is held with one hand. Therefore, a hands-free communication device that can make a call without holding the mobile phone by using a microphone or a speaker mounted on the vehicle in cooperation with the mobile phone has already been put into practical use.

  However, even if a hands-free communication device is mounted on a vehicle, there are drivers who make a call with a mobile phone in hand. Therefore, in the vicinity where a driver talks with a mobile phone in his or her cabin (near the driver's head), the mobile phone cannot be used due to jamming, while It has been proposed to provide a hands-free mobile phone holder at a position where there is no position (Patent Document 1). By doing this, the driver naturally attaches the mobile phone to the mobile phone holder and makes a hands-free call, so that the driver does not hold the mobile phone in his hand. Also, in order to save power consumption, it has been proposed to stop the output of jamming waves when a mobile phone attached to the mobile phone holder receives an incoming call.

JP 2008-136083 A

  However, with the proposed technology described above, even when a mobile phone holder is attached to a mobile phone holder that does not allow interference, a call can be made as long as the interference is generated nearby. There is a problem that there is a risk of adversely affecting the call quality at the other seats and the call quality at other seats such as the passenger seat.

  The present invention has been made in view of the above-described problems of the prior art, and suppresses a call with a mobile phone held by a driver while holding a hand-free call quality and other seats. The purpose is to provide a technology capable of preventing deterioration of call quality in the Internet.

  In order to solve the above-described problem, a hands-free communication device according to the present invention is connected to a mobile phone, and the mobile phone outputs sound received from outside the vehicle from a vehicle speaker and is collected by a vehicle microphone. Is transmitted to the outside of the vehicle via a mobile phone, and a jamming radio wave that interferes with communication between the outside of the vehicle and the mobile phone is output to a predetermined range including the driver's seat. The communication means includes a communication means for transmitting / receiving voice data collected by the microphone and voice data received from outside the vehicle to / from the mobile phone, and the communication means and the mobile phone transmit / receive these voice data. If the connection is possible, output of jamming signals is stopped.

  When the communication means of the hands-free call device and the mobile phone are in a connected state (a state in which voice data can be transmitted and received), there is a high possibility that a hands-free call will be made. It is unlikely that you will have a call. In this regard, according to the hands-free communication device of the present invention, when the communication means and the mobile phone are not connected, the communication between the outside of the vehicle and the mobile phone is disabled by outputting jamming radio waves. When the means and the mobile phone are in a connected state, communication between the outside of the vehicle and the mobile phone is enabled by stopping the output of jamming radio waves. As a result, it is possible to prevent deterioration of the call quality in the hands-free type and in other seats such as the passenger seat while suppressing the call with the mobile phone in hand.

It is explanatory drawing which shows the structure of the hands-free type communication apparatus 10 of an Example. It is explanatory drawing which shows the arrangement | positioning position of jamming electric wave output part 33a-33c. 4 is a flowchart illustrating jamming stop processing executed by a control device 11. It is explanatory drawing which shows the structure of the hands-free type communication apparatus 20 of the modification 1. It is explanatory drawing which shows the arrangement | positioning position of signal strength detection part 22a, 22b. 3 is a flowchart showing jamming stop processing executed by a control device 21. It is explanatory drawing which shows the structure of the hands-free type communication apparatus 40 of the modification 2.

Hereinafter, in order to clarify the contents of the present invention described above, an embodiment of a hands-free communication device will be described.
A. Device configuration :
FIG. 1 shows the configuration of a hands-free communication device 10 provided in a vehicle. The hands-free communication device 10 according to the present embodiment is a device capable of making a call using the mobile phone 50 without causing the driver's hand to hold the mobile phone 50 such as a smartphone (so-called hands-free). It is.
The control device 11 of the hands-free communication device 10 has a board on which a CPU, a memory, various controllers, various circuits, an antenna, and the like are mounted, and these boards are located behind the instrument panel in front of the driver's seat. Is installed. When the inside of the control device 11 is classified into functional blocks having respective functions, as shown in FIG. 1, the control device 11 is a Bluetooth (registered trademark) signal, which is one of the short-range wireless communication standards, and includes at least It has the Bluetooth communication part 12 which transmits / receives the signal (henceforth a "Bluetooth signal" only) according to HFP (Hands-Free Profile).

  In addition, the control device 11 includes a received sound output processing unit 13. When the reception data received by the mobile phone 50 from the call destination via the public line network 60 is received as a Bluetooth signal from the mobile phone 50, the Bluetooth communication unit 12 outputs the received reception data to the reception sound output processing unit 13. To do. The received sound output processing unit 13 outputs a received sound from the speaker 31 based on the received data received from the Bluetooth communication unit 12. As the speaker 31, a speaker for an audio system provided on an instrument panel or the like may be used, or a speaker dedicated to the hands-free communication device 10 may be provided.

In addition, the control device 11 includes an utterance sound input processing unit 14. A microphone 32 is provided in front of the driver's seat (for example, a steering wheel or an instrument panel), and the utterance sound input processing unit 14 uses the voice of the driver (collected) input from the microphone 32 as utterance data. And the utterance data is output to the Bluetooth communication unit 12. The Bluetooth communication unit 12 transmits the speech data received from the speech sound input processing unit 14 to the mobile phone 50 as a Bluetooth signal. The speech data received by the mobile phone 50 is transmitted to the call destination via the public line network 60.
As described above, the hands-free communication device 10 according to the present embodiment is configured so that the Bluetooth communication unit 12, the received sound output processing unit 13, and the utterance sound input processing unit 14 cooperate with the mobile phone 50. This makes it possible to make a call without holding 50 (so-called hands-free call).

  Further, the control device 11 of the hands-free communication device 10 includes an initial registration unit 15. The initial registration unit 15 registers device identification information such as a BD address received from the mobile phone 50 via the Bluetooth communication unit 12 in the registration information storage unit 16. The device identification information is unique information for identifying the mobile phone 50 and is stored in the mobile phone 50 in advance. The Bluetooth communication unit 12 is registered when receiving the above-described received data from the mobile phone 50 or transmitting the above-mentioned utterance data to the mobile phone 50 (transmission and reception of the Bluetooth signal with the mobile phone 50). The device identification information (BD address or the like) registered in the information storage unit 16 is used as the address of the reception source or transmission destination.

  In addition, the control device 11 is provided in the registration determination unit 17 that determines whether the device identification information received from the mobile phone 50 via the Bluetooth communication unit 12 is already stored in the registration information storage unit 16 or in the vehicle. The vehicle stop determination unit 18 determines whether or not the vehicle is stopped based on the vehicle speed sensor.

  The control device 11 also includes a jamming radio wave control unit 19 that controls the jamming radio wave output of the jamming radio wave output units 33a to 33c. That is, the hands-free communication device 10 according to the present embodiment outputs three interferences that output “interference radio waves” that interfere with radio waves (hereinafter referred to as “public radio waves”) received by the mobile phone 50 via the public network 60. Radio wave output units 33a to 33c are provided, and the jamming radio wave control unit 19 controls the output of jamming radio waves from the jamming radio wave output units 33a to 33c. The jamming radio wave is a radio wave in the same frequency band (800 MHz band, 1.5 GHz band, etc.) as that of the radio wave (public radio wave) transmitted from the base station of the mobile phone 50, and the electric field from the base station. Generate radio waves with a field strength slightly greater than the strength.

  FIG. 2 shows a plan view of the interior of the vehicle as viewed from above, and shows the installation positions of the jamming radio wave output units 33a to 33c. As shown in FIG. 2, the jamming radio wave output units 33a to 33c are provided inside the door, inside the steering wheel, and inside the driver's seat, respectively. Among these jamming radio wave output units 33a to 33c, the jamming radio wave output unit 33a provided inside the door has a propagation range of the jamming radio wave to be output larger than the other jamming radio wave output units 33b and 33c. ing. Thereby, most of the range (predetermined range) around the driver's seat is covered with the propagation range of the jamming radio wave output from the jamming radio wave output unit 33a, and the remaining range of the range around the driver's seat is output as the jamming radio wave. Covering with the propagation range of the jamming radio wave output from the parts 33b and 33c. In this way, the area around the driver's seat can be covered with jamming radio waves, which prevents the driver's mobile phone from receiving public radio waves normally. Further, the propagation range of the jamming radio wave output unit 33a provided at a position far from other seats such as the passenger seat and the rear seat is set large, and the jamming radio wave output units 33b and 33c provided at positions near the other seats are set. Since the propagation range is set to be small, it is possible to suppress interference with public radio waves that reach mobile phones existing in other seats.

  The jamming radio wave control unit 19 and the jamming radio wave output units 33a to 33c correspond to “jamming radio wave output unit” in the present invention, and the Bluetooth communication unit 12 corresponds to “communication unit” in the present invention. Corresponding to “connection determination means” in the present invention, the vehicle stop determination unit 18 corresponds to “vehicle stop determination means” in the present invention.

  Hereinafter, the “jamming wave stop process” performed in the hands-free communication device 10 as described above will be described. In this jamming radio wave stopping process, a process for appropriately stopping jamming radio wave output by the jamming radio wave output units 33a to 33c is performed.

B. Interference stop processing:
FIG. 3 shows a flowchart of jamming stop processing performed in the hands-free communication device 10 of the present embodiment. The jamming signal stopping process is actually performed by the CPU in the control device 11 executing a program stored in the ROM. Hereinafter, the control device 11 or the function blocks 12 to 19 described above are executed. It will be described as the execution subject. The jamming signal stopping process is performed at regular intervals (for example, every 4 milliseconds) after the jamming signal output units 33a to 33c start outputting jamming signals by turning on the ACC power of the vehicle. To be done.

When the jamming radio wave stopping process shown in FIG. 3 is started, the control device 11 first determines whether or not the jamming radio wave output units 33a to 33c have already stopped the jamming radio wave output (S100). As a result, if the output of the jamming radio wave is already stopped (S100: yes), it is not necessary to perform the process of stopping the output of the jamming radio wave, which will be described later, and thus the jamming radio wave stopping process shown in FIG.
On the other hand, when the jamming radio wave is output (S100: no), the vehicle stop determination unit 18 of the control device 11 determines whether or not the vehicle has stopped traveling based on the vehicle speed sensor ( S102). As a result, when the vehicle has stopped running (S102: yes), the jamming radio wave control unit 19 causes the jamming radio wave output units 33a to 33c to stop the output of the jamming radio wave. That is, if the vehicle is in a stopped state, driving is not performed in the first place, so it is not dangerous even if a call is made with the mobile phone 50 in hand. Therefore, by stopping the output of the jamming radio wave, the mobile phone 50 can normally receive the public radio wave and can make a call using the mobile phone 50. As a result, it is possible to prevent the call quality from being deteriorated while the vehicle is stopped, while suppressing the driver's phone call while holding the mobile phone while the vehicle is running.

When the output of the jamming radio wave is stopped when the vehicle stops in this way, the jamming radio wave output is started again as the vehicle starts traveling. For example, as soon as the ACC power supply is turned on, the vehicle has stopped traveling, so the output of jamming radio waves is temporarily stopped, but when the vehicle starts running thereafter, the output of jamming radio waves is started.
As described above, even if the output of the jamming radio wave is started by turning on the ACC power, the output is stopped until the vehicle starts running. Therefore, instead of starting the output of the jamming radio wave immediately after the ACC power is turned on, the output of the jamming radio wave may be started after the vehicle starts running after the ACC power is turned on. In this case, since the jamming radio wave is not output until the vehicle starts running after the ACC power is turned on, it is not necessary to perform the process for stopping the jamming radio wave (jamming radio wave stopping process shown in FIG. 3). As a result, it is possible to save power for outputting jamming radio waves and power for performing jamming radio wave stopping processing.

  On the other hand, when it is determined that the vehicle is running in the determination process of S102 (S102: no), it is determined whether the Bluetooth communication unit 12 has received a Bluetooth signal (S104). That is, when the mobile phone 50 is made available (connected) in the hands-free call device 10, a Bluetooth signal is transmitted from the mobile phone 50 to the hands-free call device 10. It is determined whether or not the Bluetooth communication unit 12 is receiving. As a result, when the Bluetooth signal is not received (S104: no), the jamming wave stopping process shown in FIG.

  On the other hand, when the Bluetooth communication unit 12 has received the Bluetooth signal (S104: yes), the device identification information included in the Bluetooth signal is detected (S106). That is, since the Bluetooth signal includes device identification information such as a BD address indicating (identifying) the mobile phone 50 that has transmitted the Bluetooth signal, the device identification information is detected. Then, the registration determination unit 17 determines whether or not the detected device identification information is already stored (registered) in the registration information storage unit 16 (S108). As will be described in detail later, if the mobile phone 50 has been connected to the hands-free call device 10 before, the device identification information of the mobile phone 50 is stored in the registration information storage unit 16. Accordingly, in the determination process of S106, it is determined whether or not the mobile phone 50 that has transmitted the Bluetooth signal this time is a mobile phone 50 that has been connected to the handsfree communication device 10 before.

  As a result, if the detected device identification information is not stored in the registration information storage unit 16 (S108: no), the received Bluetooth signal includes a signal requesting registration of the device identification information (registration request signal). Judge whether or not. That is, when the mobile phone 50 has not been connected to the hands-free communication device 10 before and the mobile phone 50 is connected to the hands-free communication device 10 for the first time (available in the hands-free communication device 10). A registration request signal is transmitted from the mobile phone 50 to the handsfree communication device 10. Therefore, in the determination process of S108, it is determined whether or not the registration request signal is received. As a result, if the registration request signal has not been received (S110: no), the jamming wave stopping process shown in FIG.

  On the other hand, when the registration request signal is received (S110: yes), the initial registration unit 15 stores the device identification information included in the registration request signal in the registration information storage unit 16 (S112). . At this time, device identification information indicating (identifying) the device such as a BD address is also transmitted to the mobile phone 50 as a Bluetooth signal from the hands-free communication device 10 side, and the device identification information is transmitted to the mobile phone 50. Remembered. Thus, when the device identification information of the mobile phone 50 is stored in the hands-free call device 10 (registration information storage unit 16), and the device identification information of the hands-free call device 10 is stored in the mobile phone 50 ( When the hands-free communication device 10 and the mobile phone 50 store each other's device identification information), by using these device identification information (such as a BD address) as the recipient or recipient address, Data can be transmitted and received between the hands-free communication device 10 (Bluetooth communication unit 12) and the mobile phone 50. That is, the hands-free communication device 10 (Bluetooth communication unit 12) and the mobile phone 50 are in a connected state (making the mobile phone 50 usable in the hands-free communication device 10, hereinafter referred to as “pairing”) It is possible to make a call without holding the telephone 50 (hereinafter referred to as “hands-free call”).

  Thus, when the device identification information is stored in each other and pairing is performed between the hands-free communication device 10 and the mobile phone 50 (S112), the jamming radio wave control unit 19 sends the jamming radio wave control units 19 to the jamming radio wave output units 33a to 33c. The output of the jamming radio wave is stopped (S114). That is, when the hands-free call device 10 and the mobile phone 50 are paired, a call (hands-free call) without the mobile phone 50 is possible. It is estimated that a telephone call is made. In other words, it is estimated that a call is not performed with the mobile phone 50 held in the hand. Therefore, by stopping the output of jamming radio waves, the mobile phone 50 can normally receive public radio waves, and a call using the mobile phone 50 (hands-free call) can be performed. Thus, when the output of the jamming radio wave is stopped (S114), the jamming radio wave stopping process shown in FIG. 3 is terminated.

  On the other hand, if it is determined in S108 that the device identification information of the mobile phone 50 has already been stored in the registered information storage unit 16 (S108: yes), the processes of S110 and S112 described above are omitted. The jamming radio wave control unit 19 stops the jamming radio wave output units 33a to 33c from outputting the jamming radio waves (S114). That is, the fact that the device identification information of the mobile phone 50 has already been registered in the registration information storage unit 16 means that pairing has been performed before, and a hands-free call can be made without performing pairing again. It is a state. Therefore, it is estimated that the hands-free call is performed, in other words, the call with the cellular phone 50 held in the hand is not performed. Therefore, by stopping the output of jamming radio waves, the mobile phone 50 can normally receive public radio waves, and a call using the mobile phone 50 (hands-free call) can be performed. Thus, when the output of the jamming radio wave is stopped (S114), the jamming radio wave stopping process shown in FIG. 3 is terminated.

  As described above, when the pairing is performed between the hands-free communication device 10 and the mobile phone 50 (when the Bluetooth communication unit 12 and the mobile phone 50 are connected), the hands-free type There is a high possibility that a telephone call is being made, and as a result, there is a low possibility that a telephone call is being held with the mobile phone 50 in hand. In this respect, according to the hands-free communication device 10 of the present embodiment, when the pairing is not performed between the hands-free communication device 10 and the mobile phone 50, the mobile phone 50 is output by outputting jamming radio waves. Will not be able to receive public radio waves (communication between the outside of the vehicle and the mobile phone 50), but if pairing is performed between the hands-free communication device 10 and the mobile phone 50, , The mobile phone 50 can receive public radio waves (communication between the outside of the vehicle and the mobile phone). As a result, it is possible to prevent deterioration of the call quality in the hands-free type and in other seats such as the passenger seat while suppressing the call with the mobile phone in hand.

  Further, as described above, the hands-free communication device 10 of the present embodiment uses the device identification information (identification information in the present invention) of the mobile phone 50 that has been connected to the hands-free communication device 10 before. A registration information storage unit 16 (storage means in the present invention) for storing is provided, and the Bluetooth communication unit 12 communicates with the mobile phone 50 by Bluetooth communication (wireless in the present invention) and also has device identification information for identifying the mobile phone 50. When the device identification information received by the Bluetooth communication unit 12 is the same as the device identification information stored in the registration information storage unit 16, the registration determination unit 17 (connection determination unit in the present invention) receives the mobile phone. 50 is determined to be connected (paired) with the handsfree communication device 10. Therefore, it is possible to save the trouble of physically connecting the hands-free communication device 10 and the mobile phone 50 again, and the hands-free communication device 10 of this embodiment can be easily realized.

C. Modified example:
C-1. Modification 1
Next, a first modification of the above-described embodiment will be described. The control device 21 of the hands-free communication device 20 of Modification 1 includes two signal strength detection units 22a and 22b that detect the electric field strength of the Bluetooth signal transmitted from the mobile phone 50, as shown by a thick frame in FIG. And a portable position determination unit 23 that determines whether the mobile phone 50 is on the driver seat side or the passenger seat side based on the electric field strength of the Bluetooth signal detected by the two signal strength detection units 22a and 22b. ing. In the hands-free communication device 20 of the first modification, the other functions (12 to 19, 31 to 33) are the same as those of the hands-free communication device 10 of the above-described embodiment.

  As shown in FIG. 5, of the two signal strength detection units 22a and 22b, the signal strength detection unit 22a is provided inside the instrument panel on the driver's seat side, and the signal strength detection unit 22b is an instrument on the passenger seat side. It is provided inside the instrument panel. As a matter of course, the electric field strength of the Bluetooth signal detected by the signal strength detection units 22a and 22b increases as the distance to the mobile phone 50 that transmits the Bluetooth signal (the thick arrow in the figure) decreases. Therefore, the portable position determination unit 23 compares the electric field strength of the Bluetooth signal detected by the signal strength detection unit 22a with the electric field strength of the Bluetooth signal detected by the signal strength detection unit 22b, and based on the comparison result, the driving position is determined. It is determined that the mobile phone 50 exists on the seat side. For example, when the electric field strength of the Bluetooth signal detected by the signal strength detection unit 22a is larger than the electric field strength of the Bluetooth signal detected by the signal strength detection unit 22b, it is determined that the mobile phone 50 exists on the driver's seat side. .

FIG. 6 shows a flowchart of the jamming wave stopping process of the first modification. As shown in FIG. 6, in the jamming wave stopping process of the first modification, most of the processes (S100 to S114) are the same as the jamming wave stopping process of the above-described embodiment. This is different from the jamming wave stopping process of the above-described embodiment.
That is, in the jamming wave stopping process of the first modification, when the hands-free communication device 20 and the mobile phone 50 are paired (S112), the jamming radio wave output is not immediately stopped but the jamming radio wave output is stopped. Before stopping, the mobile phone position determining unit 23 determines whether the paired mobile phone 50 exists on the driver's seat side (S200). In addition, when the pairing between the hands-free communication device 20 and the mobile phone 50 has been performed before (S108: yes), the output of the jamming radio wave is not stopped immediately, but the output of the jamming radio wave is stopped. Before, the mobile phone position determination unit 23 determines whether or not the mobile phone 50 that has been previously paired exists on the driver's seat side (S200).
If it is determined as a result of the determination process in S200 that the paired mobile phone 50 does not exist on the driver's seat side (is present on the passenger seat side) (S200: yes), the output of jamming radio waves is output. Do not stop. On the other hand, when it is determined that the paired mobile phone 50 exists on the driver's seat side (S200: yes), the output of the jamming radio wave is stopped (S114).

  As described above, the hands-free communication device 20 of the first modification includes the signal strength detection units 22a and 22b (signal strength detection means in the present invention) for detecting the strength of the signal transmitted from the mobile phone 50, and the mobile phone. 50 is provided with a mobile position determination unit 23 (portable position determination means in the present invention) for determining whether or not the mobile phone 50 exists on the driver's seat side based on the intensity of the signal transmitted from the mobile phone 50. Then, when the mobile phone 50 is paired with the handsfree communication device 20 (is in a connected state) and the mobile phone 50 exists on the driver's seat side, the output of jamming radio waves is stopped. Accordingly, when the mobile phone 50 of the passenger sitting in another seat such as the passenger seat is paired with the hands-free communication device 20, the output of the jamming radio wave is stopped, and another mobile phone (hands) by the driver is stopped. It is possible to prevent a phone call having a mobile phone that is not paired with the free call device 20 in hand.

C-2. Modification 2
Next, a second modification of the above-described embodiment will be described. In the above-described embodiment, the hands-free communication device 10 and the mobile phone 50 communicate with each other wirelessly. However, as shown in FIG. 7, a wired communication unit 42 that performs data transmission / reception with the mobile phone 50 by wire. The hands-free communication device 40 and the mobile phone 50 may communicate with each other by wire. That is, when performing a hands-free call, the hands-free call device 40 (wired communication unit 42) and the mobile phone 50 are connected by a predetermined communication cable 44 such as a USB cable. When the hands-free communication device 40 and the mobile phone 50 are connected to each other via the communication cable 44, they recognize each other via the communication cable (store the mutual device information).

  As a result, it is possible to transmit and receive received data and utterance data between the hands-free call device 40 and the mobile phone 50. Therefore, the hands-free call device 40 and the mobile phone 50 can perform a hands-free call. It becomes possible connection state. In this case, it is estimated that the hands-free call is performed, in other words, the call with the mobile phone 50 held in the hand is not performed. Therefore, when the hands-free communication device 40 and the mobile phone 50 are connected by the communication cable 44, the connection determination unit 43 (connection determination means in the present invention) detects the connection, and the interference radio wave control unit 19 detects the interference radio wave. The output units 33a to 33c are configured to stop the output of jamming radio waves. Thus, the mobile phone 50 can normally receive public radio waves, and a call using the mobile phone 50 (hands-free call) can be performed.

  As described above, the hands-free communication device 40 according to the second modification is formed by connecting the hands-free communication device 40 and the mobile phone 50 with the communication cable 44, that is, physically hands-free communication device 40. When the mobile phone 50 is connected, it is determined that the hands-free communication device 40 and the mobile phone 50 are in a connected state. Therefore, it can be determined with high accuracy that the hands-free communication device 40 and the mobile phone 50 are in a connected state. In the hands-free communication device 40 of the second modification, it is preferable to provide the communication cable 44 at the driver's seat. As a result, the mobile phone 50 existing on the driver's seat side is connected to the hands-free call device 40, and as a result, the driver's mobile phone 50 is likely to be connected to the hands-free call device 40. . As a result, when the cellular phone 50 of the passenger sitting in another seat such as the passenger seat and the hands-free communication device 40 are connected, the output of the jamming radio wave is stopped, and the other cellular phone by the driver is stopped. This makes it possible to prevent a call with a hand held in the hand (a mobile phone that is not connected to the hands-free communication device).

  As described above, the hands-free communication device according to the embodiment and the modification has been described, but the present invention is not limited to the above-described embodiment and the modification, and can be implemented in various modes without departing from the gist thereof. it can.

  For example, the communication method between the hands-free communication device and the mobile phone 50 is not limited to the methods described in the above-described embodiments and modifications, and various methods can be employed. For example, a so-called proximity communication technique having a short communication distance (for example, a few tens of centimeters) may be used. When such a proximity communication technology is employed, it is preferable to provide a communication unit such as an antenna for communicating with the mobile phone 50 on the driver's seat side. As a result, the mobile phone 50 on the driver's seat side is connected to the hands-free call device, and thus the driver's mobile phone 50 is likely to be connected to the hands-free call device. . As a result, the mobile phone 50 of the passenger sitting in another seat such as the passenger seat and the hands-free communication device are connected, and the output of jamming waves is stopped, and another mobile phone ( This makes it possible to prevent the user from making a call while holding a hand-free type telephone (a mobile phone that is not in a connected state).

  In the first modification described above, it is determined that the mobile phone 50 exists on the driver's seat side based on the comparison results of the plurality of signal strength detection units 22a and 22b. Based on the intensity of the signals detected by the two signal intensity detection units, it may be determined that the mobile phone 50 exists on the driver's seat side. This can reduce the number of signal strength detection units, increase the productivity of the hands-free communication device, and reduce the size of the hands-free communication device.

  Moreover, in the Example or modification mentioned above, it is good also as providing operation parts, such as a switch provided in the driver's seat periphery, and a touch panel. And when a driver | operator performs predetermined operation with respect to an operation part, the operation signal which shows this operation will be transmitted to the mobile phone 50 from a hands-free-type telephone, and operation (for example, transmission operation, A receiving operation, a call disconnecting operation, etc.) may be performed.

  Moreover, in the Example or modification mentioned above, it is good also as providing the display part provided in the driver's seat front. Based on a signal indicating the state of the mobile phone 50 transmitted from the mobile phone 50 to the hands-free call device, the state of the mobile phone 50 (for example, receiving a call or busy) is displayed on the display unit. It is good. In addition, as the display unit, a display unit used in an in-vehicle system different from a hands-free communication device such as a car navigation system or an audio system may be diverted to a hands-free communication device.

DESCRIPTION OF SYMBOLS 10 ... Hands-free communication apparatus, 11 ... Initial registration part, 12 ... Bluetooth communication part, 13 ... Received sound output process part, 14 ... Speech input process part, 15 ... Initial registration part,
16 ... Registration information storage unit, 17 ... Registration judgment unit, 18 ... Vehicle stop judgment unit,
19 ... Interference signal controller, 20 ... Hands-free communication device,
21 ... Control device, 22a, 22b ... Signal intensity detector,
23 ... Mobile position determination unit, 31 ... Speaker, 32 ... Microphone,
33a to 33c: Interference radio wave output unit, 40 ... Hands-free communication device,
42 ... Wired communication unit, 43 ... Connection determination unit

Claims (6)

Audio connected to the mobile phone (50) is output from the vehicle speaker (31), and the audio collected by the vehicle microphone (32) is output outside the vehicle via the mobile phone. A hands-free communication device that transmits to
Jamming radio wave output means (19, 33a to 33c) for outputting a jamming radio wave that interferes with communication between the outside of the vehicle and the mobile phone to a predetermined range including around the driver's seat;
Communication means (12) for transmitting / receiving voice data collected by the microphone and voice data received by the mobile phone from outside the vehicle;
Connection determination means (17) for determining whether or not the communication means and the mobile phone are in a connection state capable of transmission and reception;
The hands-free communication device, wherein the jamming radio wave output means is a means for stopping the output of the jamming radio wave when the connection judging means judges that the communication means and the mobile phone are in the connected state. The hands-free communication device according to claim 1,
Storage means (16) for storing identification information of the mobile phone that has been connected to the hands-free communication device;
The communication means is means for wirelessly communicating with the mobile phone and receiving identification information for identifying the mobile phone,
When the identification information received by the communication means is the same as the identification information stored in the storage means, the connection determination means indicates that the mobile phone is connected to the hands-free call device. A hands-free communication device which is a means for determining. The hands-free communication device according to claim 1 or 2, wherein
Signal strength detection means (22a, 22b) for detecting the strength of a signal transmitted from the mobile phone;
Portable position determination means (23) for determining whether or not the mobile phone is present on the driver's seat side based on the intensity of the signal detected by the signal intensity detection means;
The interference radio wave output means determines that the connection determination means determines that the mobile phone is connected to the hands-free communication device, and the mobile position determination means determines that the mobile phone exists on the driver's seat side. A hands-free communication device that is means for stopping the output of the jamming radio wave when the interference occurs. The hands-free communication device according to claim 1,
The communication means is means (42) for communicating with the mobile phone by wire,
The connection determination means is connected to the hands-free call device when the communication means is connected to the mobile phone by a cable (44) for performing wired communication. A hands-free communication device which is means (43) for determining The hands-free communication device according to any one of claims 1 to 4,
Vehicle stop determining means (18) for determining that the vehicle has stopped running,
The hands-free communication device, wherein the jamming radio wave output means is a means for stopping the output of the jamming radio wave even when the vehicle stop judgment means judges that the vehicle has stopped running. A hands-free communication device that is connected to a mobile phone and makes a hands-free call is a control method for jamming radio waves that stops the output of jamming radio waves to start the call,
Determining whether the mobile phone is connected to the hands-free communication device (S108);
A jamming radio wave control method comprising: a step of stopping the output of the jamming radio wave when it is determined that the connection state is established (S114).

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