JP5666966B2 - Integrated tuner - Google Patents

Description

  The present invention relates to an integrated tuner used for a plurality of communications.

  Conventionally, an electronic key system and a tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) are known as devices mounted on a vehicle. The electronic key system is a system that locks and unlocks a door lock, starts an engine, and the like by wireless communication between an electronic key carried by a user of the vehicle and the vehicle. On the other hand, the tire air pressure monitoring system is a system that obtains tire air pressure and temperature from a tire valve of a vehicle by radio communication during traveling and notifies a driver of tire abnormality.

  In the electronic key system, when the electronic key receives a request transmitted from the vehicle, the electronic key automatically returns an ID code to the vehicle in response to the request to execute ID verification. In the electronic key system, door lock / unlock is permitted when ID verification is established outside the vehicle compartment, and engine start is permitted when ID verification is established within the vehicle interior.

  In addition, the tire pressure monitoring system includes a receiver that can receive a radio signal including the pressure and temperature transmitted from the tire valve, a tire pressure monitoring control that displays the pressure and temperature from the received signal, and warns when there is an abnormality. The apparatus is provided in the vehicle.

  In recent years, receivers (integrated tuners) capable of receiving both a radio signal from an electronic key of an electronic key system and a radio signal from a tire valve of a tire pressure monitoring system have been devised (for example, Patent Documents 1 and 2). reference). Since the integrated tuner receives the frequency for the tire pressure monitoring system and the frequency for the electronic key system, it is necessary to switch the reception function (such as the reception frequency) in the reception circuit. Therefore, a structure in which a microcomputer (TPMS microcomputer) is provided in the integrated tuner and the reception function of the reception circuit is switched under the control of the TPMS microcomputer has been studied. That is, a structure for controlling the receiving circuit via the TPMS microcomputer has been devised.

  By the way, since the integrated tuner operates as one receiver of the electronic key system, the TPMS microcomputer is controlled by an ECU (for example, a smart ECU that controls the electronic key system) provided outside the integrated tuner. In recent years, TPMS microcomputers also tend to control the operating state of the receiving circuit by serial control. This is because, even if the TPMS microcomputer has only one vibrator for setting the operation clock (reference frequency), if the serial control is used, it is possible to increase the number of channels in the receiving circuit.

JP 2008-66964 A JP 2009-97272 A

  By the way, it has been devised to use a highly accurate vibrator (hereinafter referred to as an external vibrator) such as a crystal vibrator as a vibrator of the TPMS microcomputer. However, the crystal resonator can oscillate with high accuracy, but has low resistance to external impacts. For this reason, if the external vibrator breaks down, the TPMS microcomputer (internal microcomputer) cannot execute the function setting of the receiving circuit, so that there is a possibility that the integrated tuner cannot receive radio waves.

  The present invention has been made in view of such circumstances, and the purpose of the present invention is to receive a signal even if the external oscillator does not operate normally in an integrated tuner that performs reception control of a plurality of frequencies via an internal microcomputer. It is to provide an integrated tuner that can continue.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 includes a receiving means capable of selectively receiving radio waves of a plurality of frequencies, and an internal control means for setting a receiving function of the receiving means. An integrated tuner for switching the receiving function of the receiving means by serial control based on an oscillation signal of an external vibrator provided outside of the receiving means when a control signal for setting the function of the receiving means is input. The internal oscillator provided in the internal control means, the operation determining means for determining the operation of the external oscillator, and the operation determining means determining that the external oscillator has stopped operating, Switching means for switching the operation clock of the internal control means from the external vibrator to the internal vibrator and operating the receiving means with the clock of the internal vibrator; and the internal vibration by the receiving means When the setting of the reception function is complete based on, and the operation stopping means for stopping the operation of said internal control means, further comprising a as its gist.

  According to this configuration, the internal control means is operated by the internal vibrator in place of the external vibrator that has stopped operating, so that reception can be continued even if the external vibrator stops operating normally. . In addition, the internal control means that has entered the state of using the internal oscillator is not activated at all times, but is activated only during the reception setting operation. If it is lower than this, it is possible to suppress the deterioration of the reception performance.

  According to a second aspect of the present invention, in the integrated tuner according to the first aspect, when the internal control means is in a stop state after switching of the vibrator by the switching means, an external control signal is switched. And a resetting means for restarting the internal control means, setting the receiving means to the receiving function based on the control signal, and returning the internal control means to a stopped state after the setting. Is the gist.

  According to this configuration, when it is detected that the control signal from the outside has been switched, the internal control means is activated and stops its own operation after the transducer is switched. For this reason, even if the external vibrator stops operating, it is possible to prevent the internal control means from operating according to the clock of the internal vibrator and unnecessarily continuing the operation by the internal vibrator.

  According to a third aspect of the present invention, in the integrated tuner according to the first or second aspect, a radio signal transmitted from the electronic key of the electronic key system and a radio signal transmitted from the tire valve of the tire pressure monitoring system The gist of the invention is that the internal control means controls the tire pressure monitoring system, and the external control means provided on the outside controls the electronic key system via the internal control means. It is said.

  According to this configuration, the integrated tuner is capable of receiving radio signals applied to the electronic key system and the tire pressure monitoring system, and even if the external vibrator stops operating, the electronic key is subjected to reception control by the external control means. The system can perform reception as usual.

  According to the present invention, in an integrated tuner that performs reception control of a plurality of frequencies via an internal microcomputer, reception can be continued even if the external vibrator stops operating normally.

The block diagram which shows schematic structure of an electronic key system and a tire pressure monitoring system. The flowchart which shows operation | movement of the TPMS microcomputer of an integrated tuner according to the state of an external vibrator. The figure which shows the operation state of an integrated tuner when a TPMS microcomputer or an external vibrator stops operating.

Hereinafter, an embodiment in which the present invention is embodied in an integrated tuner of a vehicle will be described with reference to FIGS.
As shown in FIG. 1, the vehicle 1 is provided with an electronic key system 3 that locks and unlocks a door lock, starts an engine, and the like by wireless communication with an electronic key 2 carried by a user. Further, the vehicle 1 is provided with a tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) 4 for monitoring the tire pressure. In this embodiment, a receiver for receiving radio signals transmitted from the electronic key 2 of the electronic key system 3 and the tire valve 5 of the tire pressure monitoring system 4 is integrated. That is, the vehicle 1 is provided with an integrated tuner 14 that receives radio signals transmitted from the electronic key 2 and the tire valve 5.

  The vehicle 1 is provided with a verification ECU (Electronic Control Unit) 11 that controls the electronic key system 3 and a main body ECU 31 that manages the power supply system of the vehicle 1. The verification ECU 11 includes an LF transmitter 12 embedded in a door and capable of transmitting LF (Low Frequency) band radio waves to the outside of the vehicle interior, and LF band radio waves embedded in the vehicle interior floor and the like. A vehicle interior LF transmitter 13 capable of transmitting is connected. The verification ECU 11 is connected to an integrated tuner 14 that is embedded in a vehicle body or the like and can receive UHF (Ultra High Frequency) band radio waves. For example, a main body ECU 31 that manages door lock locking / unlocking and the like and an engine ECU 32 are connected to the verification ECU 11 via an in-vehicle LAN (Local Area Network) 30. Note that the verification ECU 11 performs mutual wireless communication with the electronic key 2 and performs ID verification against the ID code registered in its own memory 11a.

  On the other hand, the electronic key 2 used in the electronic key system 3 is provided with a communication control unit 21 as a control unit. The communication control unit 21 includes a memory 21a in which an ID code is stored as a unique key code. Connected to the communication control unit 21 are an LF receiving unit 22 capable of receiving LF band radio waves transmitted externally and a UHF transmission unit 23 capable of transmitting UHF band radio waves in accordance with instructions from the communication control unit 21. Yes.

  When the user is located outside the vehicle compartment, the verification ECU 11 intermittently transmits a request signal Srq from the vehicle exterior LF transmitter 12 to the vehicle compartment to try to establish smart communication. When the electronic key 2 receives the request signal Srq by the LF receiving unit 22, the electronic key 2 returns an ID code signal Sid including the ID code registered in its own memory 21a from the UHF transmission unit 23. When the integrated ECU 14 receives the ID code signal Sid, the verification ECU 11 compares the ID code of the ID code signal Sid with the ID code registered in its own memory 11a to perform ID verification. When the verification ECU 11 confirms that the ID verification outside the vehicle compartment (vehicle interior verification) is established, the verification ECU 11 processes that the electronic key 2 is located outside the vehicle compartment and that the vehicle exterior verification is established. Therefore, the main body ECU 31 is caused to execute the unlocking operation of the door lock. That is, the door lock is unlocked simply by holding the electronic key 2 and approaching the vehicle 1 and touching the unlock sensor 16.

  When the user gets off, the verification ECU 11 attempts to establish smart communication with the operation of the lock sensor 15 as a trigger. When the verification outside the vehicle compartment is established, the verification ECU 11 causes the main body ECU 31 to perform a door lock locking operation. That is, the door lock is locked only by holding the electronic key 2 and getting off and touching the lock sensor 15. At this time, when it is detected that the lock sensor 15 is touched, the verification ECU 11 first performs a vehicle exterior verification to check whether or not the electronic key 2 exists outside the vehicle cabin. When the verification ECU 11 confirms that the vehicle exterior verification is established, the verification ECU 11 performs ID verification (vehicle interior verification) in the vehicle interior in order to confirm that the electronic key 2 is left behind in the vehicle interior. When the verification ECU 11 confirms that the vehicle interior verification is not established, the main body ECU 31 performs door lock locking, assuming that the electronic key 2 has not been left behind in the vehicle interior.

  The vehicle 1 is provided with an engine ECU 32 that performs engine ignition control and fuel injection control based on the fact that the vehicle interior verification of the verification ECU 11 is established. The engine ECU 32 is connected to various ECUs such as the verification ECU 11 through the in-vehicle LAN 30. The driver's seat of the vehicle 1 is provided with an engine switch 33 that is operated when the power state (power position) of the vehicle 1 is switched. The engine switch 33 is connected to the verification ECU 11.

  When the engine switch 33 is pressed, the verification ECU 11 transmits a request signal Srq from the vehicle interior LF transmitter 13 and executes vehicle interior verification. When confirming that the vehicle interior verification is established, the verification ECU 11 determines that the vehicle interior verification is established, assuming that the electronic key 2 is located in the vehicle interior.

  The verification ECU 11 permits the main body ECU 31 to operate the engine switch 33 when confirming that the vehicle interior verification is established. When the electronic key 2 is present in the passenger compartment, the main body ECU 31 repeatedly changes the power state in the order of ACC on → IG on → power off every time the engine switch 33 is pushed. In addition, when the electronic key 2 is present in the vehicle interior, the verification ECU 11 causes the engine ECU 32 to start the engine when the engine switch 33 is operated while the brake pedal is depressed when the engine is stopped.

  Each tire of the vehicle 1 is provided with a tire valve 5 capable of detecting a state such as tire air pressure. The tire valve 5 is equipped with a pressure sensor, a temperature sensor, an acceleration sensor, a UHF transmitter, a controller for controlling these components, and the like. When the acceleration sensor mounted inside detects the acceleration, the tire valve 5 transmits a detection signal Stp in the order of each valve using a radio wave in the UHF band. The detection signal Stp includes tire air pressure, temperature, and a unique ID (valve ID) of the tire valve 5. The acceleration sensor detects whether the tire is rotating by detecting acceleration in the tire radial direction.

  In the driver's seat of the vehicle 1, a display device 35 that displays tire pressure and the like to the driver is installed. When the integrated tuner 14 receives the detection signal Stp transmitted from the tire valve 5, the display device 35 displays the air pressure and temperature of each tire from the integrated tuner 14 via the main body ECU 31.

  The vehicle 1 is provided with an integrated tuner 14 used for the electronic key system 3 and the tire pressure monitoring system 4. The integrated tuner 14 of this example receives a plurality of radio waves having different frequencies such as a radio wave from the electronic key 2 and a radio wave from the tire valve 5 with one tuner.

  The integrated tuner 14 is provided with a TPMS microcomputer 42 that performs reception control and controls the tire pressure monitoring system 4. The TPMS microcomputer 42 performs reception control of the electronic key system 3 in accordance with a control signal (control command) from the verification ECU 11. At this time, the TPMS microcomputer 42 switches the reception function of the integrated tuner 14 between the function of the electronic key system 3 and the function of the tire pressure monitoring system 4. In other words, the TPMS microcomputer 42 functions as internal control means provided inside the integrated tuner 14, and the verification ECU 11 functions as external control means provided outside the integrated tuner 14. The reception function refers to reception frequency, demodulation method, signal frame, bit rate, and the like.

  The integrated tuner 14 is provided with an antenna switching circuit 40 that switches antennas according to frequency settings, and a reception IC 41 that performs reception settings such as reception frequency and amplifies and demodulates received signals. For example, a switch or the like is used for the antenna switching circuit 40, and the antenna to be used is switched by a switching command from the TPMS microcomputer 42. The TPMS microcomputer 42 sets the reception function of the reception IC 41 by serial control based on the control signal input from the verification ECU 11. That is, the reception IC 41 sets the reception frequency, the demodulation method, and the like according to a command input from the TPMS microcomputer 42 through serial communication. Further, the reception IC 41 outputs reception data acquired from the radio signal received by the antenna of the integrated tuner 14 to the TPMS microcomputer 42 and the verification ECU 11. The receiving IC 41 and the antenna switching circuit 40 function as receiving means.

  The TPMS microcomputer 42 operates using a reference frequency obtained from an external vibrator 43 provided outside the TPMS microcomputer 42, not the internal vibrator 48 provided inside. For example, a ceramic vibrator is used as the internal vibrator 48, and a quartz vibrator is used as the external vibrator 43, for example. Since the ceramic vibrator or the like used for the internal vibrator 48 is generally low in accuracy, an external vibrator 43 made of a crystal vibrator or the like is separately provided. However, the external vibrator 43 such as a quartz vibrator may not operate due to an external impact.

  Therefore, in the integrated tuner 14 of this embodiment, when the external vibrator 43 stops operating, the internal vibrator 48 is used instead of the external vibrator 43. That is, the TPMS microcomputer 42 is provided with an operation determination unit 44 that determines the operation state of the external transducer 43 and a transducer switching unit 45 that switches the transducer. The operation determination unit 44 determines whether or not the external vibrator 43 is operating normally, for example, based on whether or not a pulse signal input from the external vibrator 43 is input. When the operation determination unit 44 determines that the external transducer 43 is not operating, the transducer switching unit 45 switches the transducer that obtains the reference frequency from the external transducer 43 to the internal transducer 48, and By operating the TPMS microcomputer 42 with 48 operation clocks, the reception function of the reception IC 41 is set to a function corresponding to the control signal. That is, when the accurate external vibrator 43 does not operate, the TPMS microcomputer 42 operates using the internal vibrator 48 and performs only reception control. By doing in this way, the integrated tuner 14 can continuously perform reception control from the verification ECU 11 related to the electronic key system 3. The operation determination unit 44 functions as an operation determination unit. Further, the vibrator switching unit 45 functions as switching means.

  The TPMS microcomputer 42 is provided with an operation stop unit 47 that stops the operation of the TPMS microcomputer 42 when the setting operation of the reception function of the reception IC 41 by the TPMS microcomputer 42 is completed. When the reception function setting completion notification is input from the reception IC 41 when the TPMS microcomputer 42 is in the activated state, the operation stop unit 47 stops the operation of the TPMS microcomputer 42 that is being activated, that is, puts the TPMS microcomputer 42 into the stop mode. . The operation stop unit 47 functions as an operation stop unit and a resetting unit.

  The TPMS microcomputer 42 is provided with a signal monitoring unit 46 that monitors whether or not the control signal has changed during the stop mode. When detecting the switching of the control signal, the signal monitoring unit 46 restarts the TPMS microcomputer 42 and sets the reception function of the reception IC 41 to a function based on the currently input control signal. Then, after resetting the reception function, the TPMS microcomputer 42 returns to the stop mode again.

Next, the operation of the integrated tuner of this example will be described with reference to FIG.
First, the TPMS microcomputer 42 of the integrated tuner 14 operates using the reference frequency of the external vibrator 43. The verification ECU 11 outputs a first control signal to the integrated tuner 14 as an air pressure monitoring request when the vehicle 1 is stopped or traveling, and outputs a second control signal as a key verification execution request when the vehicle 1 is parked. Output to the integrated tuner 14. Stopping refers to a state in which the vehicle 1 is turned on although the vehicle speed is “0”, and parking refers to a state in which the vehicle speed is “0” and the vehicle 1 is turned off.

  Incidentally, when the vehicle 1 is stopped or parked, the integrated tuner 14 is always activated to search for radio waves from the tire valve 5. This is because the detection signal Stp is received from all four tires within a certain time. Further, when the vehicle 1 is parked, the integrated tuner 14 is intermittently activated and searches for the ID code signal Sid. This is because the key verification is only temporarily performed in the day when the user gets on the vehicle 1, so that radio wave exploration is intermittently driven, and as a result, the power supply of the vehicle 1 can be saved.

  As illustrated in FIG. 2, the TPMS microcomputer 42 activates the operation determination unit 44 when a control signal (first control signal, second control signal) is input from the verification ECU 11. When activated, the TPMS microcomputer 42 determines whether or not the external vibrator 43 is operating (step S1). That is, the operation determination unit 44 determines whether or not the external vibrator 43 is operating normally based on whether or not a pulse signal input from the external vibrator 43 is input. The operation determination unit 44 determines that the external vibrator 43 is operating when the pulse signal is input from the external vibrator 43 as usual (step S1: NO). When determining that the external vibrator 43 is operating, the TPMS microcomputer 42 switches the vibrator for obtaining the reference frequency to the external vibrator 43 (step S7). The transducer switching unit 45 maintains the current state when the external transducer 43 was originally used. The TPMS microcomputer 42 operates using the reference frequency of the external vibrator 43, switches the antenna to the antenna switching circuit 40, and performs reception settings such as the reception frequency to the reception IC 41 (step). S8).

  At this time, if the vibrator to be used is the external vibrator 43, the TPMS microcomputer 42 sets the reception function of the reception IC 41 by moving with the operation clock of the external vibrator 43. When the reception setting is performed, the integrated tuner 14 receives and demodulates a radio signal received according to the setting, and outputs the reception data to the TPMS microcomputer 42 and the verification ECU 11. The TPMS microcomputer 42 and the verification ECU 11 acquire received data only when they perform reception control, and perform processing based on the received data.

  On the other hand, the operation determination unit 44 determines that the external vibrator 43 is not operating when no pulse signal is input from the external vibrator 43 (step S1: YES). When determining that the external vibrator 43 is not operating, the TPMS microcomputer 42 switches the vibrator for obtaining the reference frequency from the external vibrator 43 to the internal vibrator 48 (step S2). The transducer switching unit 45 maintains the current state when the internal transducer 48 was originally used. Then, the TPMS microcomputer 42 operates using the reference frequency of the internal vibrator 48, switches the antenna to the antenna switching circuit 40, and performs reception settings such as the reception frequency to the reception IC 41 (step). S3).

  At this time, if the vibrator used is the internal vibrator 48, the TPMS microcomputer 42 operates with the clock of the internal vibrator 48 and sets the reception function of the reception IC 41. When the reception setting is performed, the integrated tuner 14 receives and demodulates a radio signal received according to the setting, and outputs the reception data to the TPMS microcomputer 42 and the verification ECU 11. The TPMS microcomputer 42 and the verification ECU 11 acquire received data only when they perform reception control, and perform processing based on the received data.

  The TPMS microcomputer 42 stops the operation when the reception setting is completed (step S4). That is, the operation stop unit 47 stops the operation of the TPMS microcomputer 42 when the reception setting is completed. For this reason, the internal vibrator 48 does not affect the reception state of the integrated tuner 14.

  The TPMS microcomputer 42 determines whether or not the control signal has changed (step S5). That is, the signal monitoring unit 46 restarts the TPMS microcomputer 42 in the stop mode when the change of the control signal is confirmed, for example, when the control signal is changed from the second control signal to the 21st control signal (step S6). At this time, the integrated tuner 14 has been operating as the receiver of the electronic key system 3 until then, but at this point, the integrated tuner 14 is switched to the receiver of the tire pressure monitoring system 4. Then, the process proceeds to step S1.

  The TPMS microcomputer 42 operates by the clock of the internal vibrator 48 and sets the reception function of the reception IC 41 to a function according to the tire pressure monitoring system 4 (step S3). The TPMS microcomputer 42 returns to the stop mode again after setting the function of the receiving IC 41. The integrated tuner 14 notifies the collation ECU 11 that recognizes the integrated tuner 14 as a receiver for the tire pressure monitoring system 4 when the TPMS microcomputer 42 is in the stop mode, and notifies the failure.

  The integrated tuner 14 of this example integrates the vehicle-side receivers of the electronic key system 3 and the tire pressure monitoring system 4. When the external vibrator 43 that provides a reference frequency to the TPMS microcomputer 42 that performs reception control of the integrated tuner 14 does not operate, the reception control can be continued by switching to the internal vibrator 48. In addition, when the reception setting is completed using the internal vibrator 48, the operation of the TPMS microcomputer 42 is stopped, thereby suppressing the influence of the low precision internal vibrator 48 on the operation of the integrated tuner 14 as much as possible. it can.

  As shown in FIG. 3, for example, when the TPMS microcomputer 42 itself stops operating, the integrated tuner 14 functions and the tire pressure monitoring system regardless of whether or not the internal vibrator 48 is used. Neither function 4 nor reception control can be performed. However, it is rare that the TPMS microcomputer 42 does not operate.

  On the other hand, the external vibrator 43 using a crystal vibrator or the like may not operate due to an external impact. For example, when the external vibrator 43 stops operating, the integrated tuner 14 does not use either the function of the electronic key system 3 or the function of the tire pressure monitoring system 4 unless the internal vibrator 48 is used as in the prior art. Cannot perform reception control. However, when the integrated tuner 14 uses the internal vibrator 48 instead of the external vibrator 43, the function of the electronic key system 3 is received when the TPMS microcomputer 42 performs reception setting in response to a reception control command from the verification ECU 11. Control can be performed.

  In addition, when the integrated tuner 14 uses the internal vibrator 48 instead of the external vibrator 43, the TPMS microcomputer 42 can operate although it is not perfect, so that the function of the tire pressure monitoring system 4 can be operated to some extent. it can. Therefore, for example, the verification ECU 11 or another ECU can be notified that somewhere in the tire pressure monitoring system 4 is out of order.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) Since the TPMS microcomputer 42 is operated by the internal vibrator 48 instead of the external vibrator 43 that has stopped operating, reception can be continued even if the external vibrator 43 stops operating normally. In addition, the TPMS microcomputer 42 that has been in a state of using the internal vibrator 48 is not activated at all times, but is activated only during the reception setting operation of the reception IC 41, thereby replacing the internal vibrator 48. When the accuracy is lower than that of the external vibrator 43, it is possible to suppress deterioration of reception performance.

  (2) The TPMS microcomputer 42 is activated by a control command from the verification ECU 11 and stops operating after switching the vibrator. For this reason, even if the external vibrator 43 stops operating, it is possible to suppress the TPMS microcomputer 42 from operating by the clock of the internal vibrator 48 and unnecessarily continuing the operation by the internal vibrator 48.

  (3) The integrated tuner 14 can receive radio signals applied to the electronic key system 3 and the tire pressure monitoring system 4, and even if the external vibrator 43 stops operating, the electronic key system in which reception control is performed by the verification ECU 11 3 can perform the receiving operation as usual.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the external vibrator 43 is provided with a crystal vibrator and the internal vibrator 48 is provided with a ceramic vibrator. However, when the accuracy of the internal vibrator 48 is low with respect to the external vibrator 43, The present invention is particularly effective.

  In the above embodiment, the present invention is not limited to the configuration in which the accuracy of the internal vibrator 48 is low with respect to the external vibrator 43, and the present invention is applied to any configuration that uses the external vibrator 43 while including the internal vibrator 48 Is possible.

-In above-mentioned embodiment, when the tire valve 5 receives an activation signal, you may make it transmit the detection signal Stp in response.
In the above embodiment, the frequency of the radio signal used in the electronic key system 3 is not necessarily limited to LF or UHF, and other frequencies can be used. Further, the frequency when the radio signal is transmitted from the vehicle 1 to the electronic key 2 and the frequency when the radio signal is returned from the electronic key 2 to the vehicle 1 are not necessarily limited to different ones. Also good.

  In the above embodiment, the electronic key system 3 is not limited to a smart system that performs ID verification by mutual wireless communication and performs the operation of the in-vehicle device, but performs ID verification by unidirectional wireless communication from the electronic key 2 to perform the operation of the in-vehicle device. A remote keyless system may be employed.

  In the above-described embodiment, the electronic key system 3 and the tire pressure monitoring system 4 are implemented in the integrated tuner 14. However, as long as it receives radio signals related to a plurality of systems, the control device of one system is provided in the integrated tuner 14, and the control device of the other system is provided outside the integrated tuner 14. The present invention can be employed.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Electronic key, 3 ... Electronic key system, 4 ... Tire pressure monitoring system, 5 ... Tire valve, 21 ... Communication control part, 22 ... LF reception part, 23 ... UHF transmission part, 11 ... External control means 12 ... External LF transmitter, 13 ... In-vehicle LF transmitter, 14 ... Integrated tuner, 15 ... Lock sensor, 16 ... Unlock sensor, 30 ... In-vehicle LAN, 31 ... Main body ECU, 32 ... Engine ECU, 34 ... door lock device, 35 ... display device, 40 ... antenna switching circuit as receiving means, 41 ... receiving IC as receiving means, 42 ... TPMS microcomputer as internal control means, 43 ... external vibrator, 44 ... an operation determination unit as an operation determination unit, 45 ... a transducer switching unit as a switching unit, 46 ... a signal monitoring unit, 47 ... an operation stop unit and a resetting unit Operation stop of, 48 ... internal oscillator, Sid ... ID code signal, Srq ... request signal, Stp ... detection signal.

Claims (3)

A receiving means capable of selectively receiving radio waves of a plurality of frequencies; and an internal control means for setting a receiving function of the receiving means, the internal control means for setting the function of the receiving means from the outside of itself. When the control signal is input, based on the oscillation signal of the external vibrator provided outside itself, an integrated tuner that switches the reception function of the reception means by serial control,
An internal vibrator provided inside the internal control means;
Operation determining means for determining the operation of the external vibrator;
When the operation determining means determines that the external vibrator has stopped operating, the operation clock of the internal control means is switched from the external vibrator to the internal vibrator, and the receiving means is switched to the clock of the internal vibrator. Switching means operated by
An integrated tuner, comprising: an operation stop unit that stops the operation of the internal control unit when the receiving unit completes the setting of the reception function based on the internal vibrator. The integrated tuner according to claim 1, wherein
When the internal control means is in a stop state after switching of the vibrator by the switching means, upon detecting that the control signal from the outside is switched, the internal control means is restarted and reception based on the control signal is performed. An integrated tuner, comprising: the receiving unit as a function, and a resetting unit that returns the internal control unit to a stopped state after the setting. The integrated tuner according to claim 1 or 2,
Receiving a radio signal transmitted from the electronic key of the electronic key system and a radio signal transmitted from the tire valve of the tire pressure monitoring system;
The integrated tuner characterized in that the internal control means controls the tire pressure monitoring system, and external control means provided outside itself controls reception of the electronic key system via the internal control means.

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