JP2015223904A - On-vehicle composite system and electronic key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle composite system which smoothly conducts a vehicle operation corresponding to a keyless entry system without stopping power transmission from an on-vehicle power transmission device.SOLUTION: An on-vehicle composite system 1 includes: an on-vehicle communication device 10 for a keyless entry system which is mounted on a vehicle; an on-vehicle power transmission device 20 for a wireless electric power transmission system which is mounted on the vehicle; an on-vehicle control device 30 which controls the on-vehicle communication device 10 and the on-vehicle power transmission device 20; and an electronic key 40 which is carried by a user of the vehicle. The electronic key 40 includes: a reception part which receives a request signal transmitted from the on-vehicle communication device 10 and a power transmission signal transmitted from the on-vehicle power transmission device 20; and a transmission part which transmits a response signal to the on-vehicle communication device 10 in response to the request signal or the power transmission signal.

Description

The present invention relates to an in-vehicle composite system and an electronic key, and more particularly to an in-vehicle composite system compatible with a keyless entry system and a wireless power transmission system, and an electronic key used therefor.

In recent years, an in-vehicle composite system corresponding to a keyless entry system and a wireless power transmission system has been developed. The keyless entry system uses a mechanical key using wireless communication between an in-vehicle communication device mounted on a vehicle and a portable device called an electronic key carried by a user of the vehicle (hereinafter abbreviated as an electronic key). This is a system that can perform vehicle operations such as locking / unlocking the door of the vehicle and starting / stopping the engine.

In a keyless entry system, a radio signal called a request signal (hereinafter abbreviated as a request signal) is usually transmitted from an in-vehicle communication device to an electronic key, and a radio signal called a response signal (hereinafter referred to as a response signal) corresponding to the request signal. Is abbreviated to the in-vehicle communication device from the electronic key. The response signal includes authentication information such as the ID information of the electronic key. When authentication based on the response signal is established, the vehicle operation such as locking / unlocking the vehicle door, starting / stopping the engine, etc. Is allowed.

As the request signal, a radio signal having a frequency of LF band (long wave band: 30 kHz to 300 kHz) such as 125 kHz is usually used. As the response signal, a radio signal having a frequency of UHF band (ultra-high frequency band: 300 MHz to 3 GHz) such as 315 MHz is used.

A wireless power transmission system uses a magnetic field coupling (electromagnetic induction or magnetic resonance) between a power transmission coil connected to a power transmission device and a power reception coil connected to an electronic device such as a portable terminal, to transmit the electronic device from the power transmission device to the electronic device. This is a system that transmits a power transmission signal to wirelessly and transmits power wirelessly. As a power transmission signal transmitted from the power transmission device to the electronic device, a radio signal having an LF band frequency such as 125 kHz is usually used. Hereinafter, wireless transmission of power from the power transmission device to the electronic device is abbreviated as power transmission from the power transmission device to the electronic device.

As a technique related to the in-vehicle composite system corresponding to the keyless entry system and the wireless power transmission system, Patent Document 1 and the like are disclosed. FIG. 8 is an explanatory diagram showing a configuration of the in-vehicle portable terminal charging device 201 according to Patent Document 1. As shown in FIG.

As shown in FIG. 8, the in-vehicle mobile terminal charging device 201 is mainly configured by a verification ECU 210 (in-vehicle control device) that controls a smart key system (keyless entry system). The collation ECU 210 is connected to a vehicle-side transceiver (on-vehicle communication device) such as the vehicle interior key detection transmitter 212, the vehicle interior key detection transmitter 214, and the receiver 218. The verification ECU 210 controls these transceivers. Further, a wireless power feeding device 270 (vehicle power transmission device) is connected to the verification ECU 210. Then, the verification ECU 210 controls the wireless power feeding device 270.

The verification ECU 210 is also connected with input devices such as a lock switch 222 and a touch sensor 224. The verification ECU 210 is also connected to a control device related to vehicle operation such as a body ECU 232 and an engine ECU 236 via a bidirectional multiple communication line 230.

The vehicle interior key detection transmitter 212 transmits a request signal to the electronic key 240 via the vehicle interior key detection antenna 212a disposed outside the vehicle interior. The vehicle interior key detection transmitter 214 transmits a request signal to the electronic key 240 via the vehicle interior key detection antenna 214a disposed in the vehicle interior. The electronic key 240 receives a request signal transmitted from the vehicle interior key detection transmitter 212 or the vehicle interior key detection transmitter 214, and transmits a response signal corresponding to the request signal.

The receiver 218 receives a response signal transmitted from the electronic key 240 in response to the request signal via the receiving antenna 18a. Then, the verification ECU 210 performs authentication based on the response signal received by the receiver 218. When authentication by the verification ECU 210 is established, vehicle operations such as unlocking the door lock and starting the engine are permitted.

The wireless power feeding device 270 includes a wireless power feeding control unit 272 and a power feeding unit 274. The wireless power feeding device 270 is arranged in the passenger compartment, and the electric power obtained from the in-vehicle battery 260 is coupled to a magnetic field (electromagnetic) between a primary coil (power transmission coil) and a secondary coil (power reception coil) (not shown). The power is transmitted wirelessly from the power feeding unit 274 to an electronic device such as a portable terminal (not shown) by using induction. The wireless power supply control unit 272 controls the power supply operation of the power supply unit 274.

JP 2013-48517 A

By the way, since both the request signal used in the keyless entry system and the power transmission signal used in the wireless power transmission system are radio signals of the LF band frequency, the electronic key is located near the in-vehicle power transmission device. When placed, the power transmission signal transmitted from the power transmission device becomes noise, and the electronic key may not be able to receive the request signal transmitted from the in-vehicle communication device.

If the electronic key fails to receive the request signal, a response signal corresponding to the request signal is not transmitted from the electronic key to the in-vehicle communication device, and the in-vehicle control device cannot perform authentication based on the response signal. As a result, there is a possibility that the vehicle operation corresponding to the keyless entry system cannot be performed smoothly.

In order to cope with such a problem, in the in-vehicle portable terminal charging device 201 according to Patent Document 1, when wireless communication is performed between the vehicle interior key detection transmitter 214 and the electronic key 240, Power transmission from the wireless power feeder 270 to the mobile terminal is stopped. Then, by stopping power transmission from the wireless power supply device 270 to the portable terminal, communication failure between the vehicle interior key detection transmitter 214 and the electronic key 240 due to noise generated by the wireless power supply device 270 is prevented. doing.

However, in such a method, every time wireless communication is performed between the vehicle interior key detection transmitter 214 and the electronic key 240, power transmission from the wireless power feeder 270 to the portable terminal is stopped. The procedure becomes complicated. In addition, there is a possibility of reducing the charging efficiency when charging the mobile terminal.

The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to smoothly perform the vehicle operation corresponding to the keyless entry system without stopping the power transmission from the in-vehicle power transmission device. It is to provide an in-vehicle composite system.

In order to solve this problem, an in-vehicle composite system according to claim 1 includes an in-vehicle communication device compatible with a keyless entry system, an in-vehicle power transmission device compatible with a wireless power transmission system, the in-vehicle communication device, and the in-vehicle power transmission. A vehicle-mounted control device that controls the device and an electronic key carried by the user, the electronic key receiving a request signal transmitted from the vehicle-mounted communication device and a power transmission signal transmitted from the vehicle-mounted power transmission device And a transmission unit that transmits a response signal to the in-vehicle communication device in response to the request signal or the power transmission signal.

In the in-vehicle composite system having this configuration, the electronic key includes a receiving unit that receives a request signal transmitted from the in-vehicle communication device and a power transmission signal transmitted from the in-vehicle power transmission device, and a response signal corresponding to the request signal or the power transmission signal. Is transmitted to the in-vehicle communication device. Therefore, the electronic key corresponds to the power transmission signal transmitted from the in-vehicle power transmission device even if the power transmission signal transmitted from the in-vehicle power transmission device becomes noise and cannot receive the request signal transmitted from the in-vehicle communication device. The response signal can be transmitted to the in-vehicle communication device. And the vehicle-mounted control apparatus can authenticate based on the response signal corresponding to the power transmission signal. As a result, in the in-vehicle composite system having this configuration, the vehicle operation corresponding to the keyless entry system can be smoothly performed without stopping the power transmission from the in-vehicle power transmission device.

The in-vehicle composite system according to claim 2, wherein the request signal transmitted from the in-vehicle communication device and the power transmission signal transmitted from the in-vehicle power transmission device are radio signals including components in the same frequency band. It is characterized by.

In the in-vehicle composite system having this configuration, the request signal transmitted from the in-vehicle communication device and the power transmission signal transmitted from the in-vehicle power transmission device are radio signals including components in the same frequency band. Therefore, the electronic key only needs to receive radio signals in the same frequency band, and the circuit configuration of the receiving unit on the electronic key side can be simplified.

In the in-vehicle composite system according to claim 3, the request signal transmitted from the in-vehicle communication device and the power transmission signal transmitted from the in-vehicle power transmission device are radio signals in a frequency band of 30 kHz to 300 kHz. It is characterized by.

In the in-vehicle composite system having this configuration, the request signal transmitted from the in-vehicle communication device and the power transmission signal transmitted from the in-vehicle power transmission device are radio signals in a frequency band called an LF band from 30 kHz to 300 kHz. Since the radio signal in such a frequency band has a uniform attenuation characteristic with respect to the distance, it is easy to estimate the distance from the in-vehicle communication device or the in-vehicle power transmission device to the electronic key based on the reception intensity of the request signal or the power transmission signal. Therefore, a more appropriate vehicle operation can be executed based on the distance from the in-vehicle communication device or the in-vehicle power transmission device to the electronic key.

The in-vehicle composite system according to claim 4 is characterized in that the response signal corresponding to the request signal and the response signal corresponding to the power transmission signal are the same radio signal.

In the in-vehicle composite system having this configuration, the response signal corresponding to the request signal and the response signal corresponding to the power transmission signal are the same radio signal. Therefore, the electronic key only needs to transmit the same response signal corresponding to the request signal or the power transmission signal, and the circuit configuration of the transmission unit on the electronic key side can be simplified. Further, the in-vehicle communication device only needs to receive the same response signal, and the circuit configuration of the receiving unit on the in-vehicle communication device side can be simplified. Moreover, since the vehicle-mounted control apparatus can make a determination based on the same response signal, the determination procedure on the vehicle-mounted control apparatus side can be simplified.

The in-vehicle composite system according to claim 5, wherein the electronic key includes a secondary battery that charges power obtained by receiving the power transmission signal transmitted from the in-vehicle power transmission device. .

In the vehicle-mounted composite system having this configuration, the electronic key has a secondary battery that charges power obtained by receiving a power transmission signal transmitted from the vehicle-mounted power transmitting apparatus. Therefore, even if the remaining battery level of the secondary battery decreases, the secondary battery can be charged by placing the electronic key near the in-vehicle power transmission device. As a result, the electronic key can be used without worrying about the battery life on the electronic key side, and the degree of freedom of operation on the electronic key side can be increased.

The electronic key according to claim 6 includes: an in-vehicle communication device compatible with a keyless entry system; an in-vehicle power transmission device compatible with a wireless power transmission system; an in-vehicle control device that controls the in-vehicle communication device and the in-vehicle power transmission device; A reception unit that receives a request signal transmitted from the in-vehicle communication device and a power transmission signal transmitted from the in-vehicle power transmission device. And a transmission unit that transmits a response signal to the in-vehicle communication device in response to the request signal or the power transmission signal.

The electronic key having this configuration includes a receiving unit that receives a request signal transmitted from the in-vehicle communication device and a power transmission signal transmitted from the in-vehicle power transmission device, and a response signal corresponding to the request signal or the power transmission signal to the in-vehicle communication device. A transmission unit for transmission. Therefore, the electronic key corresponds to the power transmission signal transmitted from the in-vehicle power transmission device even if the power transmission signal transmitted from the in-vehicle power transmission device becomes noise and cannot receive the request signal transmitted from the in-vehicle communication device. The response signal can be transmitted to the in-vehicle communication device. And the vehicle-mounted control apparatus can perform collation using the response signal corresponding to the power transmission signal. As a result, by using the electronic key having this configuration in the in-vehicle composite system, it is possible to smoothly perform the vehicle operation corresponding to the keyless entry system without stopping the power transmission from the in-vehicle power transmission apparatus.

ADVANTAGE OF THE INVENTION According to this invention, the vehicle-mounted composite system which can perform vehicle operation corresponding to a keyless entry system smoothly, without stopping the power transmission from a vehicle-mounted power transmission apparatus can be provided.

It is explanatory drawing which shows the structure of the vehicle-mounted composite system 1 which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the vehicle-mounted communication apparatus 10 shown in FIG. 1, and the structure of the vehicle-mounted power transmission apparatus 20. FIG. It is explanatory drawing which shows the structure of the electronic key 40 shown in FIG. It is explanatory drawing which shows the operation | movement procedure by the side of the electronic key which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the operation | movement procedure by the side of the vehicle equipment which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the vehicle-mounted composite system 101 which concerns on 2nd Embodiment of this invention. It is explanatory drawing which shows the structure of the electronic key 140 shown in FIG. It is explanatory drawing which shows the structure of the vehicle-mounted portable terminal charging device 201 which concerns on patent document 1. FIG.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. First, the configuration of the in-vehicle composite system 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an explanatory diagram showing the configuration of the in-vehicle composite system 1 according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram showing the configuration of the in-vehicle communication device 10 and the configuration of the in-vehicle power transmission device 20 shown in FIG. FIG. 3 is an explanatory diagram showing the configuration of the electronic key 40 shown in FIG.

The in-vehicle composite system 1 according to the first embodiment of the present invention is a system corresponding to a keyless entry system and a wireless power transmission system.

The keyless entry system uses communication between an in-vehicle communication device mounted on a vehicle and an electronic key carried by the vehicle user, and locks and unlocks the door of the vehicle and engine without using a mechanical key. It is a system that can perform vehicle operations such as starting and stopping.

A wireless power transmission system uses a magnetic field coupling (electromagnetic induction or magnetic resonance) between a power transmission coil connected to a power transmission device and a power reception coil connected to an electronic device such as a portable terminal, to transmit the electronic device from the power transmission device to the electronic device. This is a system that transmits a power transmission signal to wirelessly and transmits power wirelessly. Hereinafter, wireless transmission of power from the power transmission device to the electronic device is abbreviated as power transmission from the power transmission device to the electronic device.

In the present embodiment, the in-vehicle composite system 1 corresponds to an electromagnetic induction type wireless power transmission system that transmits power from a power transmission device to an electronic device using magnetic field coupling by electromagnetic induction between a power transmission coil and a power reception coil. doing.

As illustrated in FIG. 1, the in-vehicle composite system 1 includes an in-vehicle communication device 10, an in-vehicle power transmission device 20, an in-vehicle control device 30, and an electronic key 40.

The in-vehicle communication device 10 is a communication device compatible with the keyless entry system and is mounted on the vehicle 60. As illustrated in FIG. 2, the in-vehicle communication device 10 includes a first transmission unit 11, a first reception unit 13, and a first control unit 15. A first transmission antenna 12 is connected to the first transmission unit 11. A first receiving antenna 14 is connected to the first receiving unit 13. Although not shown, the first transmission antenna 12 is disposed at a predetermined position inside the vehicle 60 and outside the vehicle, respectively. The first receiving antenna 14 is disposed at a predetermined position in the vehicle interior of the vehicle 60.

The first transmission unit 11 generates a radio signal called a request signal (hereinafter, abbreviated as a request signal) and transmits the generated request signal to the electronic key 40 using the first transmission antenna 12. As the request signal, a radio signal (electromagnetic wave) having a frequency of LF band (long wave band: 30 kHz to 300 kHz) such as 125 kHz is used.

The first receiving unit 13 receives a radio signal called a response signal (hereinafter abbreviated as a response signal) transmitted from the electronic key 40 using the first receiving antenna 14. As the response signal, a radio signal (electromagnetic wave) having a frequency in the UHF band (very high frequency band: 300 MHz to 3 GHz) such as 315 MHz is used.

The response signal is subjected to modulation such as ASK (Amplitude Shift Keying) or FSK (Frequency Shift Keying), and authentication information such as ID information of the electronic key 40 is used as a modulation component. The signal is included. The first receiver 13 detects information included in the response signal by demodulating the received response signal.

The first control unit 15 controls the first transmission unit 11 and the first reception unit 13. The in-vehicle communication device 10 is connected to an in-vehicle battery device (not shown) and is supplied with power from the in-vehicle battery device.

The in-vehicle power transmission device 20 is a power transmission device compatible with an electromagnetic induction wireless power transmission system and is mounted on the vehicle 60. The in-vehicle power transmission device 20 includes a power transmission unit 21, a power transmission coil 22, and a second control unit 23, as illustrated in FIG. The power transmission coil 22 is connected to the power transmission unit 21. Although not shown, the power transmission coil 22 is disposed at a predetermined position in the passenger compartment of the vehicle 60.

The power transmission unit 21 generates a power transmission signal corresponding to the wireless power transmission system, and transmits the generated power transmission signal to the electronic device 50 such as a portable terminal corresponding to the wireless power transmission system using the power transmission coil 22. ing. As the power transmission signal, a radio signal having a frequency in the LF band such as 125 kHz is used. Although not shown, the electronic device 50 includes a power receiving coil for receiving a power transmission signal, a rectifying circuit for rectifying the received power transmission signal, a secondary battery for charging, and the like.

The second control unit 23 controls the power transmission unit 21. The in-vehicle power transmission device 20 is connected to an in-vehicle battery device (not shown) and is supplied with power from the in-vehicle battery device.

The in-vehicle control device 30 is a control device corresponding to the keyless entry system and the wireless power transmission system, and is mounted on the vehicle 60. The in-vehicle control device 30 is connected to the in-vehicle communication device 10 and the in-vehicle power transmission device 20 via an in-vehicle network (not shown). The in-vehicle control device 30 controls the in-vehicle communication device 10 and the in-vehicle power transmission device 20 in an integrated manner.

The in-vehicle control device 30 obtains information from the in-vehicle communication device 10 and makes various determinations regarding the keyless entry system. The in-vehicle control device 30 obtains information from the in-vehicle power transmission device 20 and makes various determinations regarding the wireless power transmission system. Moreover, the vehicle-mounted control apparatus 30 is connected with the vehicle-mounted battery apparatus which is not shown in figure, and electric power is supplied from the vehicle-mounted battery apparatus.

The electronic key 40 is a portable device compatible with the keyless entry system, and is carried by the user of the vehicle 60. As shown in FIG. 3, the electronic key 40 includes a second reception unit 41, a second transmission unit 43, a storage unit 45, a third control unit 46, and a battery 47. A second receiving antenna 42 is connected to the second receiving unit 41. A second transmission antenna 44 is connected to the second transmission unit 43.

The second receiving unit 41 receives the request signal transmitted from the in-vehicle communication device 10 and the power transmission signal transmitted from the in-vehicle power transmission device 20 using the second reception antenna 42. When the second receiving unit 41 receives a request signal or a power transmission signal, the second transmission unit 43 generates a response signal corresponding to the request signal or the power transmission signal, and transmits the generated response signal to the second transmission antenna 44. Is transmitted to the in-vehicle communication device 10. The storage unit 45 stores ID information of the electronic key 40 and the like.

The response signal is a radio signal having a frequency in the UHF band as described above. And a response signal turns into a signal in which the information for authentication, such as ID information of the electronic key 40, was contained by the 2nd transmission part 43 modulating. In the present embodiment, the response signal corresponding to the request signal and the response signal corresponding to the power transmission signal are the same radio signal. The same response signal means that the response signal has the same frequency, modulation method, and included information.

The third control unit 46 controls the second reception unit 41, the second transmission unit 43, and the storage unit 45. The battery 47 is a small dry battery, and supplies power to the second reception unit 41, the second transmission unit 43, the storage unit 45, and the third control unit 46.

Next, functions of the in-vehicle composite system 1 will be described. First, functions corresponding to the keyless entry system will be described. In the in-vehicle composite system 1, a request signal is periodically transmitted from the in-vehicle communication device 10 to the electronic key 40. When a response signal is transmitted from the electronic key 40 in response to the request signal, the in-vehicle communication device 10 receives the response signal, and the in-vehicle control device 30 performs authentication based on the response signal. And when authentication is materialized, the predetermined | prescribed vehicle operation regarding a keyless entry system is permitted.

The vehicle operations permitted when the authentication is established include vehicle operations such as locking / unlocking the door of the vehicle 60 and starting / stopping the engine. For example, when authentication is established, when the user of the vehicle 60 has the electronic key 40 and approaches the vehicle 60, the door of the vehicle 60 is automatically unlocked. Further, the user of the vehicle 60 can start and stop the engine simply by holding the electronic key 40 and getting on the vehicle 60 and operating the engine start switch provided in the vehicle interior. When the user of the vehicle 60 holds the electronic key 40 and moves away from the vehicle 60, the door of the vehicle 60 is automatically locked.

In this way, in the in-vehicle composite system 1, the communication between the in-vehicle communication device 10 and the electronic key 40 is used, and the vehicle door is locked / unlocked and the engine is started / stopped without using a mechanical key. The vehicle operation such as can be performed.

Next, functions corresponding to the wireless power transmission system will be described. In the in-vehicle composite system 1, first, after the power transmission coil 22 of the in-vehicle power transmission device 20 and the power receiving coil of the electronic device 50 are brought close to each other, the in-vehicle power transmission device 20 transmits a power transmission signal using the power transmission coil 22. The electronic device 50 receives a power transmission signal by using magnetic field coupling (electromagnetic induction) between the power transmission coil 22 and the power reception coil, and obtains predetermined power by rectifying the received power transmission signal. The electric power thus obtained is charged in the secondary battery of the electronic device 50.

As described above, in the in-vehicle composite system 1, power is transmitted from the in-vehicle power transmission device 20 to the electronic device 50 using magnetic field coupling (electromagnetic induction) between the power transmission coil 22 of the in-vehicle power transmission device 20 and the power receiving coil of the electronic device 50. can do.

Next, the influence of the power transmission signal of the wireless power transmission system on the keyless entry system and a method for reducing the influence will be described. As described above, since the request signal in the keyless entry system and the power transmission signal in the wireless power transmission system are both signals in the LF band, when the electronic key 40 is placed near the in-vehicle power transmission apparatus 20, There is a possibility that the power transmission signal transmitted from the in-vehicle power transmission device 20 becomes noise and the electronic key 40 cannot receive the request signal transmitted from the in-vehicle communication device.

On the other hand, in the in-vehicle composite system 1, the electronic key 40 receives the request signal transmitted from the in-vehicle communication device 10 and the power transmission signal transmitted from the in-vehicle power transmission device 20. The electronic key 40 is configured to transmit a response signal to the in-vehicle communication device 10 corresponding to the power transmission signal even when receiving the power transmission signal as well as the request signal.

As a result, the electronic key 40 transmits power transmitted from the in-vehicle power transmission device 20 even if the power transmission signal transmitted from the in-vehicle power transmission device 20 becomes noise and cannot receive the request signal transmitted from the in-vehicle communication device 10. In response to the signal, a response signal can be transmitted to the in-vehicle communication device 10. And the vehicle-mounted control apparatus 30 can authenticate based on the response signal corresponding to the power transmission signal. In this way, the influence of the power transmission signal of the wireless power transmission system on the keyless entry system is reduced.

Next, an operation procedure of the in-vehicle composite system 1 will be described with reference to FIGS. 4 and 5. FIG. 4 is an explanatory diagram showing an operation procedure on the electronic key side according to the first embodiment of the present invention. FIG. 5 is an explanatory diagram showing an operation procedure on the in-vehicle device side according to the first embodiment of the present invention. The in-vehicle device in FIG. 5 includes an in-vehicle communication device 10, an in-vehicle power transmission device 20, and an in-vehicle control device 30.

First, the operation procedure on the electronic key side will be described. As shown in FIG. 4, first, in step Sa1, the electronic key 40 waits for a request signal transmitted from the in-vehicle communication device 10 and a power transmission signal transmitted from the in-vehicle power transmission device 20.

Next, in step Sa2, the electronic key 40 makes a determination based on whether or not a request signal has been received. If a request signal is received in step Sa2, the process moves to step Sa3. Then, in response to the request signal, a response signal is transmitted from the electronic key 40 to the in-vehicle communication device 10, and then the process proceeds to step Sa4. If no request signal is received in step Sa2, the process moves to step Sa4 without transmitting a response signal.

Next, in step Sa4, the electronic key 40 makes a determination based on whether or not a power transmission signal is received. If a power transmission signal is received in step Sa4, the process moves to step Sa5. And a response signal is transmitted to the vehicle-mounted communication apparatus 10 from the electronic key 40 corresponding to a power transmission signal, and it returns to step Sa1 after that. And the procedure after step Sa1 is repeated. If no power transmission signal is received in step Sa4, the process returns to step Sa1 without transmitting a response signal. And the procedure after step Sa1 is repeated.

In the in-vehicle composite system 1, according to such a procedure, the electronic key 40 waits for a request signal and a power transmission signal. When the electronic key 40 receives the request signal or the power transmission signal, the electronic key 40 transmits a response signal to the in-vehicle communication device 10 corresponding to the request signal or the power transmission signal. When the power transmission signal is continuously transmitted, the electronic key 40 repeats transmission of the response signal every predetermined period.

Next, the operation procedure on the in-vehicle device side will be described. As shown in FIG. 5, first, in step Sb1, the in-vehicle control device 30 determines whether or not power transmission to the electronic device 50 is necessary. In step Sb1, when the in-vehicle control device 30 determines that power transmission is necessary, the process proceeds to step Sb2, where the in-vehicle power transmission device 20 starts power transmission, and a power transmission signal is transmitted from the in-vehicle power transmission device 20. And it moves to step Sb3. In step Sb1, when the in-vehicle control device 30 determines that power transmission is not necessary, the process proceeds to step Sb3 without starting power transmission.

Next, in step Sb3, the in-vehicle communication device 10 periodically transmits a request signal and waits for reception of a response signal. And in step Sb4, the vehicle-mounted control apparatus 30 performs judgment based on the presence or absence of reception of a response signal. If a response signal is received in step Sb4, the process moves to step Sb5. If no response signal has been received, the process returns to step Sb3, and the procedure from step Sb3 to step Sb4 is repeated. At that time, if the power transmission signal is transmitted in Sb2, the power transmission signal is continuously transmitted.

Next, in step Sb5, the in-vehicle control device 30 performs authentication based on the response signal. And in step Sb6, the vehicle-mounted control apparatus 30 performs judgment based on whether authentication was materialized. In step Sb6, when authentication is established, the process moves to step Sb7, and vehicle operations relating to the keyless entry system are permitted. And when predetermined time passes, it will move to step Sb8. If authentication is not established in step Sb6, the process returns to step Sb3, and the procedure from step Sb3 to step Sb6 is repeated.

Next, in step Sb8, the in-vehicle control device 30 determines whether or not to continue power transmission. In step Sb8, when continuing the power transmission, the process returns to step Sb1 without stopping the power transmission. And the procedure after step Sb1 is repeated. In step Sb8, when power transmission is stopped, the process moves to step Sb9 to stop power transmission, and then returns to step Sb1. And the procedure after step Sb1 is repeated.

In the in-vehicle composite system 1, the in-vehicle communication device 10 transmits a request signal and the in-vehicle power transmission device 20 transmits a power transmission signal according to such a procedure. When a response signal is transmitted from the electronic key 40 in response to the request signal or the power transmission signal, the in-vehicle communication device 10 receives the response signal, and the in-vehicle control device 30 performs authentication based on the response signal. And when authentication is materialized, the predetermined | prescribed vehicle operation regarding a keyless entry system is permitted.

Next, the effect of this embodiment will be described. As described above, since both the request signal and the power transmission signal are signals of the LF band, when the electronic key 40 is placed near the vehicle-mounted power transmission device 20, the power transmission signal transmitted from the vehicle-mounted power transmission device 20 is used. May become noise and the electronic key 40 may not be able to receive the request signal transmitted from the in-vehicle communication device. In such a case, in the conventional system, authentication cannot be performed between the in-vehicle communication device and the electronic key, and as a result, vehicle operation corresponding to the keyless entry system cannot be performed smoothly.

On the other hand, in the in-vehicle composite system 1 of the present embodiment, the electronic key 40 includes a second receiving unit 41 that receives a request signal transmitted from the in-vehicle communication device 10 and a power transmission signal transmitted from the in-vehicle power transmission device 20. And a second transmission unit 43 that transmits a response signal to the in-vehicle communication device 10 in response to the request signal or the power transmission signal. Therefore, the electronic key 40 transmits the power transmission signal transmitted from the in-vehicle power transmission device 20 even if the power transmission signal transmitted from the in-vehicle power transmission device 20 becomes noise and cannot receive the request signal transmitted from the in-vehicle communication device 10. In response to this, a response signal can be transmitted to the in-vehicle communication device 10. And the vehicle-mounted control apparatus 30 can authenticate based on the response signal corresponding to the power transmission signal. As a result, in the in-vehicle composite system 1 having this configuration, the vehicle operation corresponding to the keyless entry system can be smoothly performed without stopping the power transmission from the in-vehicle power transmission device 20.

In the in-vehicle composite system 1 of the present embodiment, the request signal transmitted from the in-vehicle communication device 10 and the power transmission signal transmitted from the in-vehicle power transmission device 20 are signals including radio signals in the same frequency band called the LF band. is there. Therefore, the electronic key 40 only needs to receive radio signals in the same frequency band, and the circuit configuration of the second receiver 41 on the electronic key 40 side can be simplified.

In the in-vehicle composite system 1 of the present embodiment, the request signal transmitted from the in-vehicle communication device 10 and the power transmission signal transmitted from the in-vehicle power transmission device 20 are radio signals in a frequency band called an LF band from 30 kHz to 300 kHz. It is. Since the radio signal in such a frequency band has a uniform attenuation characteristic with respect to the distance, it is easy to estimate the distance from the in-vehicle communication device 10 or the in-vehicle power transmission device 20 to the electronic key 40 based on the reception intensity of the request signal or the power transmission signal. . Therefore, a more appropriate vehicle operation can be executed based on the distance from the in-vehicle communication device 10 or the in-vehicle power transmission device 20 to the electronic key 40.

For example, in the in-vehicle composite system 1 according to the present embodiment, not only whether the electronic key 40 is present in the passenger compartment of the vehicle 60 based on the reception intensity of the request signal, but also the power transmission received by the electronic key 40. Whether or not the electronic key 40 is present in the passenger compartment of the vehicle 60 can also be determined based on the signal reception intensity. Then, based on the received intensity of the request signal or the power transmission signal, if it is determined that the electronic key 40 is not present in the vehicle interior of the vehicle 60, the safety of the vehicle 60 is increased by setting the engine not to start. Can be increased.

In the in-vehicle composite system 1 of the present embodiment, the response signal corresponding to the request signal and the response signal corresponding to the power transmission signal are the same radio signal. Therefore, the electronic key 40 only needs to transmit the same response signal in response to the request signal or the power transmission signal, and the circuit configuration of the second transmitter 43 on the electronic key 40 side can be simplified. Moreover, the vehicle-mounted communication apparatus 10 should just receive the same response signal, and can simplify the circuit structure of the 1st receiving part 13 by the vehicle-mounted communication apparatus 10 side. Moreover, since the vehicle-mounted control apparatus 30 can perform determinations, such as authentication, based on the same response signal, the determination procedure on the vehicle-mounted control apparatus 30 side can be simplified.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

First, the configuration of the in-vehicle composite system 101 according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is an explanatory diagram showing the configuration of the in-vehicle composite system 101 according to the second embodiment of the present invention. FIG. 7 is an explanatory diagram showing the configuration of the electronic key 140 shown in FIG.

As illustrated in FIG. 6, the in-vehicle composite system 101 includes an in-vehicle communication device 10, an in-vehicle power transmission device 20, an in-vehicle control device 30, and an electronic key 140. As described above, the in-vehicle composite system 101 is obtained by replacing the electronic key 40 of the in-vehicle composite system 1 according to the first embodiment of the present invention with the electronic key 140.

As shown in FIG. 7, the electronic key 140 includes a second receiver 41, a second transmitter 43, a storage unit 45, a third controller 46, a rectifier 147, and a secondary battery 148. Similar to the first embodiment, the second receiving unit 41 receives a request signal transmitted from the in-vehicle communication device 10 and a power transmission signal transmitted from the in-vehicle power transmission device 20. Moreover, the 2nd transmission part 43 is transmitting the response signal to the vehicle-mounted communication apparatus 10 corresponding to a request signal or a power transmission signal similarly to 1st Embodiment.

However, when the second reception unit 41 receives a power transmission signal transmitted from the in-vehicle power transmission device 20, a part of the received power transmission signal is transmitted to the rectification unit 147. The rectification unit 147 rectifies the power transmission signal transmitted from the second reception unit 41. The electronic key 140 drives the second receiver 41, the second transmitter 43, the storage unit 45, and the third controller 46 by rectifying the power transmission signal received by the second receiver 41. Getting power. Electric power obtained by rectifying the power transmission signal is charged in the secondary battery 148.

Next, the effect of this embodiment will be described. Normally, in an electronic key used in a keyless entry system, a small dry battery built in the electronic key supplies power to each circuit of the electronic key. And in such an electronic key, in order to lengthen the battery life of the battery on the electronic key side, it is necessary to suppress the power consumed by the circuit using various means.

On the other hand, in the in-vehicle composite system 101 of the present embodiment, the electronic key 140 includes the secondary battery 148 that charges the power obtained by the second receiving unit 41 receiving the power transmission signal transmitted from the in-vehicle power transmitting apparatus 20. Have. Therefore, even if the remaining battery level of the secondary battery 148 decreases, the secondary battery 148 can be charged by placing the electronic key 140 near the in-vehicle power transmission device 20. As a result, the electronic key 140 can be used without worrying about the battery life on the electronic key 140 side, and the degree of freedom of operation on the electronic key 140 side can be increased.

As mentioned above, although embodiment of this invention has been described, this invention is not limited to said embodiment, In the range which does not deviate from the objective of this invention, it can change suitably.

For example, in the embodiment of the present invention, the request signal and the power transmission signal may be radio signals having an LF band frequency other than 125 kHz. For example, the frequency of the request signal and the frequency of the power transmission signal may be a radio signal having a frequency of 90 kHz, or a radio signal having a frequency of 200 kHz or 300 kHz.

In the embodiment of the present invention, the request signal and the power transmission signal may be radio signals in a frequency band other than the LF band as long as a predetermined function can be realized. For example, when there is no need to estimate the distance from the in-vehicle communication device 10 or the in-vehicle power transmission device 20 to the electronic key 40 based on the reception intensity of the request signal or the power transmission signal, the request signal and the power transmission signal are 400 kHz or It may be a radio signal having a frequency of 500 kHz or higher.

In the embodiment of the present invention, the request signal and the power transmission signal may be radio signals of different frequencies in the same frequency band as long as a predetermined function can be realized. Even if the request signal and the power transmission signal are radio signals having different frequencies in the same frequency band, the power transmission signal transmitted from the in-vehicle power transmission device 20 becomes noise, and the request signal transmitted from the in-vehicle communication device 10 is changed to an electronic key. Since there is a possibility that 40 cannot be received, the same effect as in the present embodiment can be obtained.

In the embodiment of the present invention, the response signal may be a radio signal having a frequency other than those described above. As long as a predetermined function can be realized, the response signal corresponding to the request signal and the response signal corresponding to the power transmission signal may be wireless signals including different information. For example, the response signal may include identification information for identifying whether the response signal corresponds to the request signal or the response signal corresponding to the power transmission signal.

In the embodiment of the present invention, the vehicle operation corresponding to the keyless entry system may include operations other than those described above. For example, an operation switch is provided on the electronic key 40 (or the electronic key 140), and the door of the vehicle 60 is locked / unlocked or trunked in conjunction with the operation of the electronic key 40 (or the electronic key 140) on the operation switch. May be locked / unlocked or the lighting device may be blinked. Further, by using communication between the in-vehicle communication device 10 and the electronic key 40 (or the electronic key 140), vehicle information such as tire pressure may be transmitted from the in-vehicle communication device 10 to the electronic key 40 (or the electronic key 140). I do not care.

Moreover, in embodiment of this invention, the vehicle-mounted power transmission apparatus 20 may be a power transmission apparatus corresponding to the wireless power transmission system of a magnetic resonance system instead of an electromagnetic induction system. The in-vehicle power transmission device 20 may further include a communication unit for communicating with the electronic device 50 that is a target of power transmission, a detection unit for detecting the charging state of the electronic device 50, and the like. And the vehicle-mounted control apparatus 30 may perform the determination regarding the start or stop of the power transmission to the electronic device 50 based on the information which the vehicle-mounted power transmission apparatus 20 obtained using the communication means and detection means which were mentioned above.

Moreover, in embodiment of this invention, the vehicle-mounted control apparatus 30 has the function of the 1st control part 15 and the function of the 2nd control part 23, and instead of the 1st control part 15 or the 2nd control part 23, You may control the 1st transmission part 11, the 1st receiving part 13, and the power transmission part 21 collectively.

Further, in the operation procedure on the electronic key side according to the first embodiment of the present invention, when the electronic key 40 receives both the request signal and the power transmission signal, the electronic key 40 selects the request signal and the power transmission signal. The response signal may be transmitted corresponding to only one of the signals. Further, when the power transmission signal is continuously transmitted, the electronic key 40 does not repeat the transmission of the response signal every predetermined period, but once within the period during which the power transmission signal is continuously transmitted. Only the response signal may be transmitted.

Further, in the operation procedure on the in-vehicle device side according to the first embodiment of the present invention, the in-vehicle communication device 10 does not periodically transmit a request signal, but opens and closes the door of the vehicle 60 or switches the engine start switch. A request signal may be transmitted in conjunction with a specific vehicle operation such as an operation.

DESCRIPTION OF SYMBOLS 1 Vehicle-mounted composite system 10 Vehicle-mounted communication apparatus 11 1st transmission part 12 1st transmission antenna 13 1st reception part 14 1st reception antenna 15 1st control part 20 Car-mounted power transmission apparatus 21 Power transmission part 22 Power transmission coil 23 2nd control part 30 Car-mounted Control device 40 Electronic key 41 Second reception unit 42 Second reception antenna 43 Second transmission unit 44 Second transmission antenna 45 Storage unit 46 Third control unit 47 Battery 50 Electronic device 60 Vehicle 101 In-vehicle composite system 140 Electronic key 147 Rectification unit 148 secondary battery

Claims (6)

In-vehicle communication device compatible with keyless entry system,
An in-vehicle power transmission device compatible with a wireless power transmission system;
An in-vehicle control device for controlling the in-vehicle communication device and the in-vehicle power transmission device;
An electronic key carried by the user;
With
The electronic key is
A receiving unit that receives a request signal transmitted from the in-vehicle communication device and a power transmission signal transmitted from the in-vehicle power transmission device;
A vehicle-mounted composite system comprising: a transmission unit that transmits a response signal to the vehicle-mounted communication device in response to the request signal or the power transmission signal. The request signal transmitted from the in-vehicle communication device;
The power transmission signal transmitted from the in-vehicle power transmission device is
It is a radio signal containing components of the same frequency band,
The in-vehicle composite system according to claim 1. The request signal transmitted from the in-vehicle communication device;
The power transmission signal transmitted from the in-vehicle power transmission device is
It is a radio signal in a frequency band of 30 kHz to 300 kHz,
The in-vehicle composite system according to claim 2. The response signal corresponding to the request signal;
The response signal corresponding to the power transmission signal is
It is the same radio signal,
The in-vehicle composite system according to any one of claims 1 to 3. The electronic key is
It has a secondary battery for charging power obtained by receiving the power transmission signal transmitted from the in-vehicle power transmission device,
The in-vehicle composite system according to any one of claims 1 to 4. In-vehicle communication device compatible with keyless entry system,
An in-vehicle power transmission device compatible with a wireless power transmission system;
An in-vehicle control device for controlling the in-vehicle communication device and the in-vehicle power transmission device;
An electronic key carried by the user;
An electronic key of an in-vehicle composite system equipped with
A receiving unit that receives a request signal transmitted from the in-vehicle communication device and a power transmission signal transmitted from the in-vehicle power transmission device;
An electronic key comprising: a transmission unit that transmits a response signal to the in-vehicle communication device in response to the request signal or the power transmission signal.