JP2006013799A - Portable device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable device which enables more reliable service between controllers even in the case where a wide area intercommunication and a narrow area intercommunication share an antenna. <P>SOLUTION: The portable device 3 shares the part of antennas 11a, 11b, and 11c receiving a first ID request signal from a controller 5 even when receiving a second ID request signal. The portable device 3 demodulates the first ID request signal, outputs the demodulation signal to a communication controller 20 for controlling the intercommunication between the portable device 3 and the controller 5. The portable device 3 automatically drives the second ID request signal based on the electromagnetic energy of the radio signal, and transmits its response signal through the partial antennas 11a, 11b, and 11c sharing the response signals. The communication controller 20 diagnoses the presence or absence of a trouble of at least one of the sharing part of the antennas 11a, 11b and 11c and a receiving controller 12 for processing to receive the radio signal received through their antennas 11a, 11b, and 11c, and informs the trouble purport. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable device used as an electronic key for a vehicle, for example.

  2. Description of the Related Art Conventionally, for example, in a vehicle, there has been proposed an engine start control device configured by a portable device possessed by a user (driver) and a control device disposed in the vehicle (see, for example, Patent Document 1). ). This type of engine start control device automatically establishes mutual communication (wide area communication) using radio signals between the portable device and the control device when the portable device enters the vehicle compartment, and the mutual communication is established. The engine is allowed to start on the condition of Specifically, the engine start control device collates with the ID code between the portable device and the control device, determines that the two ID codes match with each other and establishes mutual communication, and permits engine start. In this state where the engine is permitted to be started, the engine is started by the user operating the start operation unit provided in the vehicle compartment. As a result, the user is freed from troublesome operations such as inserting the key plate portion of the portable device into the key cylinder, and the convenience of the vehicle is improved.

  By the way, the portable device includes a communication circuit unit for performing mutual communication with the control device, and a battery for supplying power to the communication circuit unit. In addition, the portable device is operated by electromagnetic energy of a radio signal transmitted from the control device in order to enable mutual communication with the control device even when the battery is exhausted, and an ID signal including an ID code is transmitted. A transponder that transmits and enables intercommunication in a narrower area (narrowband intercommunication) than an area in which wide area intercommunication is performed is provided. On the other hand, the vehicle is provided with a narrow area mutual communication device, and the control device is configured to output a radio signal when a portable device is attached to the narrow area mutual communication device. For this reason, when the battery of the portable device is exhausted, the user attaches the portable device to the narrow area mutual communication device of the vehicle to activate the transponder and perform mutual communication between the portable device and the control device. Is possible.

In recent years, further downsizing of portable devices has been demanded for the purpose of improving the portability of portable devices. As a method for meeting such a demand, a method in which the function of the transponder is covered by the communication circuit unit can be considered. This eliminates the need for a transponder, thereby reducing the number of parts constituting the portable device and further reducing the size of the portable device.
JP 2002-213124 A

  By the way, when the portable device enters the vehicle compartment, the positional relationship between the portable device and the control device is usually not fixed. For this reason, the portable device may not be able to receive a wireless signal output from the control device depending on the positional relationship with the control device, and may not be able to perform wide-area mutual communication with the control device. Therefore, the portable device includes a plurality of antennas having different directivities, and is configured to reliably perform wide area mutual communication with the control device regardless of the positional relationship with the control device. However, even in the case of having a plurality of antennas like this, it is desirable that the limited electromagnetic energy of the radio signal can be used more effectively during narrow-area mutual communication, and when it is mounted on a narrow-area mutual communication apparatus. Therefore, the positional relationship between the portable device and the control device is naturally determined. For this reason, even in the case of such narrow-area mutual communication, the portable device can perform the same communication using not all of the plurality of antennas but a part of each of the antennas, for example, a single antenna. desirable.

  However, when such a configuration is further applied to a portable device configured to cover the functions of the transponder as described above with the communication circuit unit, it is possible to perform the narrow area mutual communication even though the wide area mutual communication can be performed. There may be a new inconvenience that it cannot be performed. That is, when a failure occurs in an antenna or the like that is set for use in the narrow-area mutual communication of the portable device, the narrow-area mutual communication is performed even though wide-area mutual communication can be performed through an antenna other than the antenna. You can't do it. In addition, in this case, since the user cannot recognize the inability of such narrow area mutual communication until the portable device is mounted on the narrow area mutual communication device, the battery is exhausted at that time. There is a concern that even starting the engine will not be noticed.

As described above, conventionally, various devices for improving the miniaturization and convenience of the portable device have been taken, but there is still room for improvement in terms of reliability.
The present invention has been made in view of such circumstances, and the purpose of the present invention is to provide a more reliable operation with a control device, even when the antenna is shared between the wide area communication and the narrow area communication. It is to provide a portable device that enables the above.

  In order to solve the above-described problem, the invention according to claim 1 includes a plurality of antennas that receive a first radio signal transmitted from a control device that controls a predetermined control target by wireless communication, and the plurality of antennas. A part of the antenna is shared as an antenna that receives the second radio signal transmitted from the control device, and the first radio signal received by the antenna is demodulated and the demodulated signal is transmitted to the control device. The second radio signal output to the communication control means for controlling the mutual communication with the antenna and received by a part shared by the antenna is automatically driven based on the electromagnetic energy of the radio signal and its response signal Is transmitted to the control device via the shared antennas, at least the shared part of the plurality of antennas, and the antennas. A diagnostic means for diagnosing the presence or absence of a failure of at least one of the means for receiving and processing the received radio signal, and informing that the failure is detected when the diagnostic means diagnoses that the diagnostic object is broken The gist is to provide a notification means.

  As described above, in such a portable device, wide area mutual communication with the control device is performed based on reception of the first wireless signal by a plurality of antennas, and the shared part of the plurality of antennas is used. Based on the reception of the second radio signal, the narrow area mutual communication is performed with the control device. Of these, narrow-area mutual communication is usually possible even when the battery that is the power source of the portable device itself is depleted, but it is used for wide-area mutual communication, especially like this portable device. In the case where narrow-area mutual communication is performed by sharing a part of a plurality of antennas, at least a part of the shared antennas or a means for receiving and processing each of the radio signals received via the antennas. If one of them seems to be out of order, the execution of the narrow-area intercommunication will be difficult. However, even in this case, as long as the power supply capacity of the battery as the power source is maintained, as described above, mutual communication with the control device using the wide area communication is possible. It is.

  In such a background, as described above, in the invention according to claim 1, at least the shared part of the plurality of antennas provided with the diagnostic means, and the respective radio signals received via the antennas And diagnosing the presence or absence of a failure in one or both of the means for receiving the signal, and when the diagnosis means diagnoses that the diagnosis target is broken, the notifying means notifies the user of the failure. I am doing so. In addition, although the way of notification by the notification means is arbitrary here, when the diagnosis target is out of order, this fact is notified so that it is difficult to use at least for narrow area mutual communication. For example, the user knows, for example, repairs or replaces the shared part of the antenna and the means for receiving processing, or replaces the battery as soon as possible to perform mutual communication with the control device by wide area communication. It becomes possible to take measures such as securing. For this reason, even if a part of a plurality of antennas is shared by wide area communication and narrow area mutual communication as a portable device, it is possible to achieve more reliable operation with the control device. Become.

  According to a second aspect of the present invention, in the portable device according to the first aspect, the means for receiving and processing the radio signal received via the antenna demodulates the first radio signal and converts the demodulated signal into the demodulated signal. A function of outputting to the communication control unit and a function of automatically driving based on electromagnetic energy of the second radio signal and transmitting a response signal to the control device via the shared antenna The gist of the invention is that it is composed of a single integrated circuit chip as a reception control unit.

  According to the second aspect of the present invention, it is possible to omit the mounting of a transponder chip (circuit) that has been widely used in portable devices, and to promote the downsizing of the transponder chip (circuit). Even if it is a case, the reliability in performing mutual communication with the control device is maintained high.

  According to a third aspect of the present invention, in the portable device according to the second aspect, the diagnosis unit obtains at least the part of the resonance frequency shared by the plurality of antennas through the reception control unit, and the obtained resonance. The gist is to diagnose the presence or absence of a failure of at least one of the plurality of antennas and the reception control unit based on a frequency.

  Normally, the resonance frequency of an antenna is adjusted by a parallel circuit of a coil and a capacitor. However, when the antenna fails, the resonance frequency thus adjusted does not match the resonance frequency originally required. For example, when the reception control unit adapts the resonance frequency of the antenna, if the reception control unit is normal, the resonance frequency adaptation result can be properly output based on a command from the diagnostic unit. If the integrated circuit chip itself constituting the reception control unit is out of order, the output of such a matching result will not be noticeable. Also, for example, when the diagnostic means adapts the resonance frequency of the antenna, if the reception control unit is normal, the above-described resonance frequency is properly input from the reception control unit. When the integrated circuit chip itself is out of order, the resonance frequency is not properly input from the reception control unit. Therefore, according to the third aspect of the present invention, whether or not there is a failure in at least one of the plurality of antennas and at least one of the integrated circuit chips constituting the reception control unit is easily and accurately determined. Can be diagnosed. If the communication control means for controlling mutual communication with the control device is provided with such a function as a diagnostic means, the above-described reliability can be maintained with a very simple configuration. It becomes like this.

  According to a fourth aspect of the present invention, in the portable device according to the second aspect, the diagnostic means applies a pseudo signal of the first radio signal to at least the shared part of the plurality of antennas. And a failure of at least one of the plurality of antennas and at least one of the reception control units based on whether an appropriate demodulated signal corresponding to the pseudo signal is obtained from the reception control unit. The gist of this is to diagnose the presence or absence.

  When the pseudo signal of the first radio signal is applied to at least the shared part of the plurality of antennas, if both the antenna and the reception control unit are normal, the reception control unit applies the pseudo signal. An appropriate demodulated signal corresponding to the pseudo signal is obtained. Conversely, if either the antenna or the reception control unit is out of order, there is no guarantee. Therefore, as a diagnostic means, such a pseudo signal is generated and applied to at least the shared part of the plurality of antennas, and also according to the invention of claim 4, at least the shared of the plurality of antennas. It becomes possible to easily and accurately diagnose whether or not there is a failure in at least one of the integrated circuit chips constituting the reception control unit. In this case, although the means for generating the pseudo signal is newly required, the presence or absence of the failure can be diagnosed through normal processing on the first radio signal as the reception control unit and the communication control means. Therefore, the diagnostic accuracy is naturally maintained at a high level. Also in this case, except for the means for generating the pseudo signal, the communication control means can have the function as the diagnosis means.

  According to a fifth aspect of the present invention, in the portable device according to the third or fourth aspect, the diagnosis unit performs the diagnosis using a period during which the first wireless signal is transmitted from the control device. The main point is that

  The above diagnosis can also be executed all the time, but in this case, battery consumption cannot be ignored. In this regard, according to the invention according to claim 5, wherein the diagnosis is executed using a period during which the first wireless signal is transmitted from the control device, the diagnosis can be executed efficiently at a desired timing. become able to.

  According to a sixth aspect of the present invention, in the portable device according to any one of the first to fifth aspects, the informing means sends a diagnosis result by the diagnostic means to the control device by the communication control means. The gist is to transmit to the control device as part of mutual communication.

  On the control device side, it is usually possible to select a notification mode with a higher degree of freedom, such as display by an indicator, ringing of a buzzer, or voice guidance. For this reason, according to the invention according to claim 6, wherein the diagnosis result is transmitted to the control device as part of mutual communication with the control device by the communication control means. The failure notification to the user can be made by selecting.

  In invention of Claim 7, in the portable device as described in any one of Claims 1-5, the said alerting | reporting means alert | reports the diagnostic result by the said diagnostic means through the said portable device itself. Is the gist.

  According to the invention described in claim 7, although the portable device itself is provided with a notification function such as an indicator or a vibration function, the user can be notified of the failure more directly. You can also do it.

  According to an eighth aspect of the present invention, in the portable device according to any one of the first to seventh aspects, the diagnosis unit diagnoses that the shared antennas of the plurality of antennas are faulty. The present invention is further characterized by further comprising switching means for switching the part of the shared antenna to another part of the plurality of antennas.

  As described above, the failure notification can inform the user that it is difficult to use at least for narrow-area mutual communication. For example, repair or replacement of a failed antenna, or replacement of a battery at an early stage, and a wide area Although it is possible to promote countermeasures such as ensuring mutual communication with the control device by mutual communication, if there is a situation or environment where these countermeasures cannot be performed immediately, fail-safe processing is performed. It is desirable that any intercommunication function can be maintained, even temporarily. In this regard, according to the invention described in claim 6, since the antenna shared by the wide area communication and the narrow area communication is switched in advance based on the diagnosis result, the wide area communication is subsequently performed even if the battery is consumed. Even if it becomes impossible, mutual communication with the control device by narrow area mutual communication is ensured accurately.

  According to the present invention, it is possible to provide a portable device that enables a more reliable operation with a control device even when an antenna is shared between wide area communication and narrow area mutual communication.

(First embodiment)
A first embodiment in which the present invention is embodied in a portable device used in an engine start control device will be described below with reference to FIGS.

  As shown in FIG. 1, the engine start control device 1 includes a portable device 3 possessed by a user and a control device 5 disposed in the vehicle. The control device 5 transmits a wireless signal indicating that a response signal is requested to the portable device 3. Specifically, the control device 5 transmits a first ID request signal for requesting the portable device 3 to transmit the first ID signal as a first radio signal to a predetermined area in the vehicle interior at predetermined intervals, and the response It will be in the reception standby state of the 1st ID signal transmitted from the portable device 3 as a signal. Then, when receiving the first ID signal, the control device 5 performs collation (first collation) between the first ID code included in the first ID signal and the first ID code which the control device 5 has.

  In addition, when the portable device 3 is attached to the narrow area mutual communication device provided in the vehicle, the control device 5 sends a second ID request signal for requesting transmission of the second ID signal to the second radio signal. Is transmitted to a narrower area than the transmission area of the first ID request signal, and a standby state for receiving the second ID signal transmitted from the portable device 3 as a response signal is set. Then, when receiving the second ID signal, the control device 5 performs collation (second collation) between the second ID code included in the second ID signal and the second ID code that the control device 5 has.

  As described above, between the portable device 3 and the control device 5, wide area communication including transmission / reception of the first ID request signal and the first ID signal, and narrow area mutual communication including transmission / reception of the second ID request signal and the second ID signal, Is done. When the first collation is established or when the second collation is established, the control device 5 permits the start of the engine. Then, the control device 5 starts the engine when a user operates a start operation section provided in the vehicle compartment, for example, an engine start switch provided in the vicinity of the steering wheel, in a state where the start of the engine is permitted.

  Further, when receiving a failure signal transmitted from the portable device 3, the control device 5 operates an alarm member such as an indicator or buzzer (not shown) provided in the vehicle compartment, and an abnormality has occurred in the portable device 3. Is notified.

  The portable device 3 includes a communication unit 10, a communication control unit 20 as a communication control unit, a diagnosis unit, and a notification unit, a transmission circuit 21, and a battery 25. The communication control unit 20 is electrically connected to the communication unit 10 and the transmission circuit 21. The battery 25 is connected to each of the communication unit 10, the communication control unit 20, and the transmission circuit 21, and supplies power to each member.

  The communication unit 10 includes an antenna unit 11, a reception control unit 12, and a switching unit 13 as switching means. The antenna unit 11 includes an X-axis antenna 11a, a Y-axis antenna 11b, and a Z-axis antenna 11c having directivity in directions orthogonal to each other. One terminal of each of the antennas 11 a, 11 b, and 11 c is connected to the reception control unit 12, and the other terminal is connected to the reception control unit 12 via the switching unit 13. In FIG. 1, the antennas 11a, 11b, and 11c are shown as a simple equivalent circuit (LC resonance circuit) configured by a parallel circuit of a coil and a capacitor.

  The switching unit 13 includes an axis switching switch 13a, a Y-axis switch 13b, and a Z-axis switch 13c. The switching unit 13 switches the connection state of the switches 13a, 13b, and 13c in accordance with an instruction from the reception control unit 12. Specifically, the switching unit 13 connects one of the antennas 11 a, 11 b, and 11 c to the input / output port PT of the reception control unit 12 by switching the axis changeover switch 13 a in accordance with an instruction from the reception control unit 12. The switching unit 13 connects or disconnects the Y-axis antenna 11b and the input port PY of the reception control unit 12 by switching the Y-axis switch 13b in accordance with an instruction from the reception control unit 12. Similarly, the switching unit 13 connects or disconnects the Z-axis antenna 11 c and the input port PZ of the reception control unit 12 by switching the Z-axis switch 13 c according to an instruction from the reception control unit 12.

  The reception control unit 12 includes a resonance frequency adjustment unit and a power storage unit (not shown). The resonance frequency adjusting unit includes a plurality of capacitors connected to each of the antennas 11a, 11b, and 11c, and an analog switch that switches a connection state of these capacitors. The power storage unit stores electromagnetic energy of the first ID request signal and the second ID request signal. This power storage unit is also electrically connected to the communication control unit 20. For this reason, the reception control unit 12 and the communication control unit 20 are operable by electromagnetic energy stored in the power storage unit.

When receiving the first ID request signal via the antennas 11a, 11b, and 11c, the reception control unit 12 demodulates the ID request signal and outputs the demodulated signal to the communication control unit 20.
In addition, the reception control unit 12 shares a part of the antennas 11a, 11b, and 11c as the antennas 11a, 11b, and 11c that receive the second ID request signal, and the second ID through the antennas 11a, 11b, and 11c. When the request signal is received, that is, when the second ID request signal is input from the input / output port PT, transmission / reception control is performed. Hereinafter, the transmission / reception control performed by the reception control unit 12 will be described in detail.

<Transmission / reception control>
First, when receiving the second ID request signal via the antennas 11a, 11b, and 11c, the reception control unit 12 stores the electromagnetic energy of the second ID request signal in the power storage unit. In addition, when power is not supplied from the battery 25, the reception control unit 12 is automatically driven by the electromagnetic energy stored in the power storage unit.

  When receiving the antenna switching signal from the communication control unit 20, the reception control unit 12 switches so that the antennas 11a, 11b, and 11c indicated by the antenna code included in the antenna switching signal are connected to the input / output port PT. The unit 13 is controlled. Specifically, when an antenna switching signal including an antenna code corresponding to the X-axis antenna 11a is input, the reception control unit 12 connects the X-axis antenna 11a and the input / output port PT with the axis switching switch 13a. Connecting. On the other hand, when an antenna switching signal including an antenna code corresponding to the Y-axis antenna 11a is input, the reception control unit 12 enters the Y-axis antenna 11b with an axis switching switch 13a as shown by a broken line in FIG. The output port PT is connected and the Y-axis switch 13b is disconnected. In addition, when an antenna switching signal including an antenna code corresponding to the Z-axis antenna 11c is input, the reception control unit 12 connects the Z-axis antenna 11c and the input / output port PT by the axis switching switch 13a. The Z-axis switch 13c is disconnected.

  Further, when the second ID signal is input from the communication control unit 20, the reception control unit 12 modulates the second ID signal and outputs it from the input / output port PT, and is connected to the antennas 11a and 11b connected by the axis changeover switch 13a. 11c transmit the second ID signal to the outside. That is, the reception control unit 12 transmits the modulated second ID signal to the outside using the antennas 11a, 11b, and 11c designated by the antenna switching signal.

  Further, when a diagnostic signal is input from the communication control unit 20, the reception control unit 12 outputs a diagnostic response signal indicating whether or not the antennas 11 a, 11 b, and 11 c are operating normally to the communication control unit 20. Perform response control. Specifically, when a diagnostic signal is input from the communication control unit 20, the reception control unit 12 opens and closes an analog switch in the resonance frequency adjustment unit, and obtains the resonance frequencies of the antennas 11a, 11b, and 11c, respectively. Then, the reception control unit 12 outputs to the communication control unit 20 a diagnostic response signal including an antenna code that identifies the antennas 11a, 11b, and 11c and the resonance frequencies of the antennas 11a, 11b, and 11c indicated by the antenna code.

The transmission circuit 21 modulates the first ID signal or the failure signal input from the communication control unit 20 into a radio wave having a predetermined frequency and outputs the modulated signal.
The communication control unit 20 includes a CPU and a memory 20a (not shown). In the memory 20a, a first ID code used for the first verification and a second ID code used for the second verification are recorded in advance. Further, in the memory 20a, the resonance frequencies (reference resonance frequencies) of the antennas 11a, 11b, and 11c when the communication unit 10 is operating normally are recorded in advance.

  In a state where power is supplied from the battery 25, the communication control unit 20 receives a demodulated signal corresponding to the first ID request signal and receives the first ID signal including the first ID code corresponding to the demodulated signal. Is output to the transmission circuit 21 and failure diagnosis control is performed to confirm whether or not the communication unit 10 is operating normally. Hereinafter, failure diagnosis control performed by the communication control unit 20 will be described in detail.

<Fault diagnosis control>
The communication control unit 20 outputs the first ID signal to the transmission circuit 21 when a demodulated signal corresponding to the first ID request signal is input. Further, the communication control unit 20 outputs a diagnostic signal to the reception control unit 12. And the communication control part 20 judges whether the communication part 10 is operate | moving normally based on the diagnostic response signal input from the reception control part 12 in response to a diagnostic signal. Specifically, the communication control unit 20 performs failure diagnosis control based on whether or not the resonance frequencies of the antennas 11a, 11b, and 11c indicated by the antenna codes included in the diagnosis response signal match the corresponding reference resonance frequencies. I do. Then, the communication control unit 20 records the antenna codes of the antennas 11a, 11b, and 11c having the resonance frequency that matches the reference resonance frequency in the memory 20a. That is, the communication control unit 20 records the antenna codes of the antennas 11a, 11b, and 11c estimated to be operating normally in the memory 20a.

  On the other hand, when the resonance frequencies of the antennas 11a, 11b, and 11c do not match the reference resonance frequency, the communication control unit 20 outputs a failure signal including the antenna code of the antennas 11a, 11b, and 11c to the transmission circuit 21. . That is, in this case, the communication control unit 20 determines that the antennas 11 a, 11 b, and 11 c are not operating normally, and outputs a failure signal to the transmission circuit 21. For example, when the resonance frequencies of the X-axis antenna 11a and the Y-axis antenna 11b match the reference resonance frequency, and the resonance frequency of the Z-axis antenna 11c does not match the reference resonance frequency, the communication control unit 20 The antenna codes of the antenna 11a and the Y-axis antenna 11b are recorded in the memory 20a. At the same time, the communication control unit 20 outputs a failure signal including the antenna code of the Z-axis antenna 11c.

  Further, the communication control unit 20 determines that the antennas 11a, 11b, and 11c or the reception control unit 12 are not operating normally even when a diagnostic response signal is not input within a predetermined time, and transmits a failure signal. Output to the circuit 21.

  As described above, the communication control unit 20 includes the antennas 11a, 11b, and 11c and the reception control unit based on the resonance frequency included in the diagnostic response signal and the reference resonance frequency that is the normal resonance frequency of the antennas 11a, 11b, and 11c. It is determined whether 12 is operating normally. When it is determined that the antennas 11a, 11b, 11c and the reception control unit 12 are not operating normally, as described above, the notification member notifies that fact, so the user This can be easily and reliably recognized by notification.

  On the other hand, when a demodulated signal corresponding to the second ID request signal is input, the communication control unit 20 outputs an antenna switching signal including an antenna code recorded in the memory 20a to the reception control unit 12. That is, the communication control unit 20 outputs an antenna switching signal including the antenna codes of the antennas 11a, 11b, and 11c that are determined to be operating normally to the reception control unit 12. At this time, when a plurality of antenna codes are recorded in the memory 20a, the communication control unit 20 outputs an antenna switching signal including one of the antenna codes to the reception control unit 12. In the present embodiment, the communication control unit 20 outputs an antenna switching signal including an antenna code first recorded in the memory 20a in the failure diagnosis control. After outputting the antenna switching signal, the communication control unit 20 outputs a second ID signal including the second ID code to the reception control unit 12. Note that the communication control unit 20 automatically starts with the power stored in the power storage unit and performs the above process when power is not supplied from the battery 25.

Next, a flow of processing performed between the reception control unit 12 and the communication control unit 20 in the failure diagnosis control performed by the communication control unit 20 will be described in detail with reference to FIG.
First, in step 100, the communication control unit 20 determines whether a demodulated signal corresponding to the first ID request signal is input. When determining that the demodulated signal corresponding to the first ID request signal has been input, the communication control unit 20 outputs the first ID signal to the transmission circuit 21 in step 101. In step 102, the communication control unit 20 outputs a diagnostic signal to the reception control unit 12. That is, the communication control unit 20 performs failure diagnosis control by outputting a diagnosis signal when the first verification is performed between the portable device 3 and the control device 5. In other words, the communication control unit 20 performs failure diagnosis control using the input of the demodulated signal corresponding to the first ID request signal as a trigger. In this way, the communication control unit 20 performs failure diagnosis control using the period during which the first ID request signal is transmitted from the control device 5. For this reason, when the user carrying the portable device 3 enters the vehicle compartment, failure diagnosis control by the communication control unit 20 is performed.

  When a diagnostic signal is input from the communication control unit 20, the reception control unit 12 obtains the resonance frequencies of the antennas 11a, 11b, and 11c in step 103, respectively. In step 104, the reception control unit 12 outputs a diagnostic response signal including the antenna codes of the antennas 11 a, 11 b, and 11 c and the resonance frequency to the communication control unit 20.

  In step 105, the communication control unit 20 matches the resonance frequencies of the antennas 11a, 11b, and 11c included in the diagnostic response signal with the reference resonance frequencies corresponding to the antennas 11a, 11b, and 11c recorded in the memory 20a. It is judged individually. As a result, when there are antennas 11a, 11b, and 11c that are determined to match the two frequencies, the communication control unit 20 records the antenna codes of the antennas 11a, 11b, and 11c in the memory 20a in step 106 and fails. The diagnosis process is temporarily terminated. On the other hand, if there are antennas 11a, 11b, and 11c in which the resonance frequency included in the diagnosis response signal is determined to be inconsistent with the reference resonance frequency in step 105, or the diagnosis response signal is input within a predetermined time. If it is determined that the communication is not performed, the communication control unit 20 outputs a failure signal to the transmission circuit 21 in step 107 and temporarily ends the failure diagnosis control. Therefore, only the antenna codes of the antennas 11a, 11b, and 11c having the same resonance frequency as the reference resonance frequency, that is, the antennas 11a, 11b, and 11c that are determined to be operating normally are recorded in the memory 20a. become.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) In a state where power is supplied from the battery 25, the failure diagnosis control of the communication unit 10 (antennas 11a, 11b, and 11c and the reception control unit 12) is performed by the communication control unit 20. When it is determined that an abnormality has occurred in the communication unit 10, a failure signal indicating that fact is transmitted from the portable device 3 to the control device 5, and the control device 5 notifies the abnormality. For this reason, before the power from the battery 25 is not supplied, the user can easily and surely recognize that it is difficult to use at least the narrow area mutual communication. Therefore, for example, even if an abnormality occurs in any of the antennas 11a, 11b, and 11c and the wide area mutual communication is possible, the narrow area mutual communication is disabled. The user can recognize the abnormality without performing narrow area mutual communication. In addition, the user can take measures such as repairing or replacing abnormal parts, or replacing batteries early to ensure wide-area mutual communication between the control device 5 and the portable device 3. Therefore, even when a part of the antennas 11a, 11b, and 11c is shared by the wide area communication and the narrow area communication as the portable device 3, the reliability between the control device 5 and the portable device 3 is higher. Operation can be planned.

  (2) The second ID code of the conventional transponder chip is recorded in advance in the memory 20a of the communication control unit 20. When a demodulated signal corresponding to the second ID request signal is input, the communication control unit 20 transmits a second ID signal including the second ID code via the reception control unit 12. For this reason, the mounting of the transponder chip in the portable device 3 can be omitted. Therefore, the miniaturization of the portable device 3 can be promoted, and even when the miniaturization is achieved in this way, a more reliable operation between the control device 5 and the portable device 3 is achieved. Can do.

  (3) The communication control unit 20 diagnoses when the user carries the portable device 3 and enters the vehicle compartment and the first verification (wide area mutual communication) is performed between the portable device 3 and the control device 5. A signal is output to perform fault diagnosis control of the communication unit 10. That is, the communication control unit 20 performs failure diagnosis control of the communication unit 10 only when the user who owns the portable device 3 exists in the vehicle compartment. Therefore, according to such a portable device 3, it is possible to efficiently and reliably notify the user that the communication unit 10 of the portable device 3 is not operating normally at a desired timing, and the darkness of the portable device 3. Current can be suppressed.

  (4) The failure signal includes the antenna codes of the antennas 11a, 11b, and 11c that are estimated to be broken. For this reason, the control device 5 can notify the malfunctioning antennas 11a, 11b, and 11c by an indicator or the like based on the malfunction signal transmitted from the portable device 3. Therefore, the user can take measures such as repair / replacement of the antennas 11a, 11b, and 11c that are not operating normally before all the antennas 11a, 11b, and 11c do not operate normally. Therefore, according to the portable device 3, more reliable operation between the portable device 3 and the control device 5 can be further maintained.

  (5) When the communication control unit 20 determines that an abnormality has occurred in the communication unit 10, the communication control unit 20 transmits a failure signal via the transmission circuit 21. When receiving the failure signal, the control device 5 activates an indicator and a buzzer arranged in the vehicle cabin to notify that the communication unit 10 of the portable device 3 has an abnormality. Therefore, according to the portable device 3, the user can easily recognize that the antennas 11a, 11b, 11c and the reception control unit 12 are not operating normally.

  (6) When transmitting the second ID signal, the communication control unit 20 outputs to the reception control unit 12 an antenna switching signal including the antenna codes of the antennas 11a, 11b, and 11c determined to be operating normally. Then, the reception control unit 12 controls the switching unit 13 so that the antennas 11a, 11b, and 11c indicated by the antenna codes included in the antenna switching signal are connected to the reception control unit 12. That is, when the second ID signal is transmitted from the portable device 3, the communication control unit 20 determines that the antennas 11a, 11b, and 11c shared by the wide area communication and the narrow area mutual communication are operating normally. The antennas 11a, 11b, and 11c are switched by the reception control unit 12, and fail-safe processing is performed. Therefore, even if the wide area communication becomes impossible due to the consumption of the battery 25, the mutual communication between the portable device 3 and the control device 5 by the narrow area mutual communication is ensured accurately.

  (7) Since the resonance frequencies of the antennas 11a, 11b, and 11c in a normally operating state are recorded in the memory 20a as the reference resonance frequency, when the antennas 11a, 11b, and 11c are operating normally The resonance frequency included in the diagnostic response signal matches the reference resonance frequency. On the other hand, when an abnormality has occurred in the antennas 11a, 11b, 11c or the reception control unit 12, the resonance frequency included in the diagnostic response signal does not match the reference resonance frequency. For this reason, the communication control unit 20 performs failure diagnosis based on the resonance frequencies of the antennas 11a, 11b, and 11c, so that it is easy to determine whether or not there is a failure in at least one of the antennas 11a, 11b, and 11c and the reception control unit 12. Diagnose accurately.

  In addition, by adopting such a failure diagnosis of the communication unit 10 based on the resonance frequency, it is not necessary to add new hardware to the portable device 3, thereby suppressing an increase in the number of parts and manufacturing cost of the portable device 3. On the other hand, a more reliable operation between the portable device 3 and the control device 5 can be maintained.

  (8) Only the antenna codes of the antennas 11a, 11b, and 11c having the same resonance frequency as the reference resonance frequency, that is, the antennas 11a, 11b, and 11c that are determined to be operating normally are recorded in the memory 20a. The Therefore, the communication control unit 20 can easily identify the normally operating antennas 11a, 11b, and 11c by referring to the antenna code recorded in the memory 20a.

(Second Embodiment)
A second embodiment of the present invention will be described below with reference to FIGS. Note that the portable device 3 of the present embodiment generates a pseudo signal as a means for generating a pseudo signal between the input / output port PT of the reception control unit 12 and the communication control unit 20 as shown by a two-dot chain line in FIG. The circuit 30 is provided, and the point that the communication control unit 20 performs failure diagnosis control using the pseudo signal generation circuit 30 is mainly different from the first embodiment. Hereinafter, the difference between the portable device 3 of the present embodiment and the first embodiment will be mainly described, and the description of the same configuration as the first embodiment will be omitted.

  As indicated by a two-dot chain line in FIG. 1, the pseudo signal generation circuit 30 is electrically connected between the input / output port PT of the reception control unit 12 and the communication control unit 20. When the pseudo signal generation signal is input from the communication control unit 20, the pseudo signal generation circuit 30 outputs the pseudo signal to the input / output port PT and the axis changeover switch 13a. The pseudo signal generation circuit 30 in the present embodiment outputs a pseudo signal having the same characteristics (frequency, amplitude, etc.) as the second ID request signal. The pseudo signal generation circuit 30 is not limited to a configuration that is electrically connected to the input / output port PT and the axis changeover switch 13a. For example, the pseudo signal generation circuit 30 may be configured to transmit a pseudo signal as a radio wave.

  When the demodulation signal corresponding to the first ID request signal is input, the communication control unit 20 outputs the first ID signal to the transmission circuit and performs failure diagnosis control. Hereinafter, failure diagnosis control performed by the communication control unit 20 will be described.

<Fault diagnosis control>
The communication control unit 20 outputs the first ID signal to the transmission circuit 21 when a demodulated signal corresponding to the first ID request signal is input. Further, the communication control unit 20 outputs an antenna switching signal including an antenna code corresponding to the X-axis antenna 11 a to the reception control unit 12. Further, the communication control unit 20 causes the reception control unit 12 to input a pseudo signal by outputting the pseudo signal generation signal to the pseudo signal generation circuit 30. That is, in this embodiment, the antenna switching signal and the pseudo signal correspond to the diagnostic signal. And the communication control part 20 judges whether the communication part 10 is operate | moving normally based on the demodulation signal (diagnosis response signal) input from the reception control part 12 in response to a diagnostic signal. Then, when an appropriate demodulated signal corresponding to the pseudo signal is input from the reception control unit 12, the communication control unit 20 determines that the communication unit 10 is operating normally and corresponds to the X-axis antenna 11a. The antenna code is recorded in the memory 20a.

  On the other hand, the communication control unit 20 does not receive a demodulation signal from the reception control unit 12 in a state where the X-axis antenna 11a is connected to the reception control unit 12, or does not receive a demodulation signal corresponding to the pseudo signal. A failure signal including the antenna code of the X-axis antenna 11 a is output to the transmission circuit 21. That is, in this case, the communication control unit 20 determines that the antennas 11 a, 11 b, and 11 c are not operating normally, and outputs a failure signal to the transmission circuit 21.

  As described above, the communication control unit 20 performs the failure diagnosis processing based on the antenna switching signal corresponding to the X-axis antenna 11a, and then performs the antenna switching signal including the antenna code corresponding to the Y-axis antenna 11b, the Z-axis. Failure diagnosis processing is sequentially performed based on an antenna switching signal including an antenna code corresponding to the antenna 11c. That is, the communication control unit 20 inputs a pseudo signal from the pseudo signal generation circuit 30 to the reception control unit 12, and whether or not the demodulated signal input from the reception control unit 12 as a response matches the demodulated signal. Whether or not the antennas 11a, 11b, 11c and the reception control unit 12 are operating normally is determined.

Next, in the failure diagnosis control performed by the communication control unit 20, the flow of processing performed among the reception control unit 12, the communication control unit 20, and the pseudo signal generation circuit 30 will be described in detail with reference to FIG.
First, in step 200, the communication control unit 20 determines whether or not a demodulated signal corresponding to the first ID request signal is input. When determining that the demodulated signal corresponding to the first ID request signal has been input, the communication control unit 20 outputs the first ID signal to the transmission circuit 21 in step 201. In step 202, the communication control unit 20 outputs an antenna switching signal including the antenna code of the X-axis antenna 11 a to the reception control unit 12. That is, also in the present embodiment, as in the first embodiment, the communication control unit 20 performs failure diagnosis control triggered by the input of the demodulated signal corresponding to the first ID request signal. For this reason, when the user carrying the portable device 3 enters the vehicle compartment, failure diagnosis control by the communication control unit 20 is performed.

  When an antenna switching signal is input from the communication control unit 20, the reception control unit 12 connects the antennas 11a, 11b, and 11c indicated by the antenna code (designated antenna code) included in the antenna switching signal to the input / output port PT. Thus, the switching unit 13 is controlled. That is, the reception control unit 12 controls the switching unit 13 so that the X-axis antenna 11a is connected to the input / output port PT.

  After outputting the antenna switching signal, the communication control unit 20 outputs a pseudo signal generation signal to the pseudo signal generation circuit 30 in step 204. When the pseudo signal generation signal is input, the pseudo signal generation circuit 30 outputs the pseudo signal to the reception control unit 12 in step 205. That is, the communication control unit 20 corresponds to outputting a diagnostic signal.

When the pseudo signal is input from the pseudo signal generation circuit 30, the reception control unit 12 demodulates the pseudo signal and outputs the demodulated signal to the communication control unit 20 in step 206.
In step 207, the communication control unit 20 determines whether a demodulated signal corresponding to the pseudo signal is input from the reception control unit 12. When determining that the demodulated signal corresponding to the pseudo signal has been input, the communication control unit 20 determines that the antennas 11a, 11b, 11c indicated by the designated antenna code and the reception control unit 12 are operating normally. In step 208, the communication control unit 20 records a designated antenna code indicating the antennas 11a, 11b, and 11c connected to the reception control unit 12, that is, an antenna code corresponding to the X-axis antenna 11a, in the memory 20a.

  On the other hand, if the demodulated signal corresponding to the pseudo signal is not input in step 207 or if the demodulated signal is not input within a predetermined time, the communication control unit 20 outputs a failure signal including the designated antenna code to the transmission circuit 21 in step 209. To do.

  Thereafter, the communication control unit 20 performs a process corresponding to steps 202 to 209 (steps surrounded by a two-dot chain line in FIG. 3) using the antenna code indicating the Y-axis antenna 11b as a designated antenna code. After that, the communication control unit 20 performs processing corresponding to steps 202 to 209 using the antenna code indicating the Z-axis antenna 11c as a designated antenna code. As a result, as in the first embodiment, only the antenna codes of the antennas 11a, 11b, and 11c that are determined to be operating normally are recorded in the memory 20a.

Therefore, according to the said embodiment, in addition to the effect of said (1)-(6) in said 1st Embodiment, the following effects can be acquired.
(9) When the antennas 11a, 11b, and 11c and the reception control unit 12 are operating normally, the communication control unit 20 receives a demodulated signal corresponding to the pseudo signal. On the other hand, when the antennas 11a, 11b, 11c and the reception control unit 12 are not operating normally, the communication control unit 20 is not input with a demodulated signal corresponding to the pseudo signal. The communication control unit 20 determines whether the antennas 11a, 11b, 11c and the reception control unit 12 are operating normally based on whether a demodulated signal corresponding to the pseudo signal is input. Therefore, the communication control unit 20 determines that the antennas 11a, 11b, 11c and the reception control unit 12 operate normally based on whether the demodulated signal input from the reception control unit 12 is a signal obtained by demodulating the pseudo signal. It can be determined whether or not.

  (10) The reception control unit 12 receives a pseudo signal having the same characteristics as the second ID request signal from the pseudo signal generation circuit 30 when the antennas 11a, 11b, and 11c are operating normally. The reception control unit 12 demodulates the pseudo second ID request signal and outputs it to the communication control unit 20. For this reason, when the demodulation signal corresponding to the pseudo signal is not input from the reception control unit 12, the communication control unit 20 can determine that even if the reception control unit 12 receives the second ID request signal, it cannot be reliably demodulated. When the demodulated signal corresponding to the pseudo signal is input, it can be determined that the reception control unit 12 can reliably demodulate when the second ID request signal is received. Therefore, the communication control unit 20 can determine with higher accuracy whether or not the antennas 11a, 11b, 11c and the reception control unit 12 are operating normally.

In addition, you may change embodiment of this invention as follows.
In the first embodiment, when a diagnostic signal is input from the communication control unit 20, the reception control unit 12 outputs the resonance frequencies of the antennas 11a, 11b, and 11c to the communication control unit 20 as a diagnostic response signal. However, the reception control unit 12 has reference resonance frequencies corresponding to the antennas 11a, 11b, and 11c in place of the communication control unit 20, and determines whether the antennas 11a, 11b, and 11c are operating normally. The determination may be made using the reference resonance frequency. The reception control unit 12 outputs a diagnostic response signal (match signal) indicating that the resonance frequencies of the antennas 11a, 11b, and 11c match the corresponding reference resonance frequency, and the two resonance frequencies match. If not, a diagnostic response signal (mismatch signal) indicating that they do not match may be output. That is, when a diagnostic signal is input from the communication control unit 20, the reception control unit 12 outputs a matching result of the resonance frequencies of the antennas 11a, 11b, and 11c instead of outputting the resonance frequencies of the antennas 11a, 11b, and 11c. You may make it do. In this case, the communication control unit 20 may be changed to output a failure signal when a diagnosis response signal indicating a coincidence signal is input from the reception control unit 12. In this way, the communication control unit 20 can determine whether the matching signal or the mismatching signal is input as the response of the diagnostic signal, or whether the diagnostic response signal is not input, by simple determination of the antennas 11a and 11b. , 11c and at least one of the reception control unit 12 can be diagnosed. Therefore, the processing burden on the communication control unit 20 can be reduced.

  In the second embodiment, the manner in which the pseudo signal is input to the input / output port PT of the reception control unit 12 is not limited to the pseudo signal generation circuit 30. For example, the portable device 3 may be configured such that the pseudo signal generation circuit 30 is omitted and a pseudo signal is input from the communication control unit 20 to the input / output port PT of the reception control unit 12. In this way, the configuration of the portable device 3 can be simplified.

  In the second embodiment, the pseudo signal is not limited to a signal having the same characteristics as the second ID request signal. For example, a triangular wave or the like may be used. Even in this case, when the communication unit 10 is not operating normally, the reception control unit 12 does not output a demodulated signal corresponding to the pseudo signal to the communication control unit 20. The communication control unit 20 can determine whether or not the communication unit 10 is operating normally based on whether or not a demodulated signal corresponding to the pseudo signal is input.

In the first and second embodiments, the portable device 3 may be configured such that the switching unit 13 is controlled by the communication control unit 20.
In the first and second embodiments, the reception control unit 12 transmits the second ID signal using one of the antennas 11a, 11b, and 11c determined to be operating normally by the communication control unit 20. To do. However, the reception control unit 12 may transmit the second ID signal using two of the plurality of antennas 11a, 11b, and 11c determined to be operating normally by the communication control unit 20. . For example, when the communication control unit 20 determines that the X-axis antenna 11a and the Y-axis antenna 11b are operating normally, the reception control unit 12 sets the X-axis antenna 11a and the Y-axis antenna 11b. The second ID signal may be transmitted using In this case, the communication control unit 20 may be modified to output an antenna switching signal including all antenna codes recorded in the memory 20a to the reception control unit 12. In short, it is only necessary that the reception control unit 12 transmits the second ID signal using a part of the antennas 11a, 11b, and 11c that are determined to be operating normally by the communication control unit 20. .

  In the first and second embodiments, the reception control unit 12 uses only the specific antennas 11a, 11b, and 11c that are set in advance, that is, the antenna 11a that is shared by the wide area communication and the narrow area communication. The second ID signal may be transmitted using only 11b and 11c. In this case, the antennas 11a, 11b, 11c and the reception control unit 12 may be directly connected without using the switching unit 13. That is, one terminal of the X-axis antenna 11a (terminal on the switching unit 13 side in FIG. 1) is the input / output port PT, one terminal of the Y-axis antenna 11b is the input port PY, and the Z-axis antenna 11c is One terminal may be connected to the input port PZ. In this way, since the switching unit 13 can be omitted, the configuration of the portable device 3 can be simplified. In addition, since the reception control unit 12 transmits the second ID signal using a predetermined one of the antennas 11a, 11b, and 11c, the power stored in the power storage unit is effectively used. can do.

  In the first and second embodiments, when transmitting the second ID signal from the portable device 3 or when the communication control unit 20 performs failure diagnosis control, the antennas 11a, 11b connected to the input / output port PT, An antenna code for designating 11c is exchanged between the reception control unit 12 and the communication control unit 20. However, the portable device 3 may be configured such that the antenna code is not exchanged between the reception control unit 12 and the communication control unit 20. And the communication control part 20 may diagnose only the presence or absence of the failure of the antennas 11a, 11b, and 11c connected to the input / output port PT of the reception control part 12. In this case, for example, when the X-axis antenna 11a is connected to the input / output port PT, the communication control unit 20 diagnoses only the presence / absence of the failure of the X-axis antenna 11a, and for the other antennas 11b and 11c, Do not diagnose failure. In this way, the communication control unit 20 does not need to diagnose the failure of all the antennas 11a, 11b, and 11c, so the processing burden is reduced.

  Further, in such a modified example, when it is determined that a failure has occurred in the diagnosed antenna (for example, the X-axis antenna 11a), the communication control unit 20 transmits the fact to the control device 5 via the transmission circuit 21. In addition, the axis changeover switch 13a may be operated so that another antenna (for example, the Y-axis antenna 11b) is connected to the input / output port PT. In this way, the failure of the antennas 11a, 11b, and 11c is surely notified to the user, and fail-safe processing for narrow area mutual communication is also possible. Therefore, a more reliable operation between the control device 5 and the portable device 3 can be achieved. Even if the communication control unit 20 operates the axis changeover switch 13a, the communication control unit 20 diagnoses whether or not the antenna (Y-axis antenna 11b) newly connected to the input / output port PT is defective. Good. As a result, when it is determined that a failure has occurred in the Y-axis antenna 11b, the shaft changeover switch 13a is operated so that another antenna (Z-axis antenna 11c) is connected to the input / output port PT. You may let them.

  In the first and second embodiments, the timing at which the communication control unit 20 performs the failure diagnosis control is not limited to the time when the demodulated signal corresponding to the first ID request signal is input. For example, the communication control unit 20 may output a diagnostic signal to the reception control unit 12 every predetermined time to perform failure diagnosis control. In this way, the user can confirm whether or not the communication unit 10 of the portable device 3 is operating normally before getting into the vehicle. Therefore, according to such a portable device 3, it can be recognized at an early stage whether or not the communication unit 10 is operating normally. That is, the timing at which the communication control unit 20 performs the failure diagnosis control may be any timing as long as power is supplied from the battery 25.

  In the first and second embodiments, the communication control unit 20 is configured such that when no antenna code is recorded in the memory 20a, that is, when all of the antennas 11a, 11b, and 11c are not operating normally, It may be changed so that the communication unit 10 determines that the communication unit 10 is not operating normally and outputs a failure signal. In this case, for example, when only one of the antennas 11a, 11b, and 11c is operating normally, the notification member does not notify that the communication unit 10 is abnormal. Therefore, only when the narrow area mutual communication between the portable device 3 and the control device 5 becomes impossible, the fact of the abnormality can be notified.

  -In the said 1st and 2nd embodiment, the aspect notified that the communication part 10 is not operate | moving normally is not limited to the thing by the control apparatus 5 provided in the vehicle. For example, a display device may be provided on the design surface of the mobile device 3, and the mobile device 3 may notify the display device that the communication unit 10 is not operating normally. In this way, the user can more directly recognize the presence / absence of the failure of at least one of the antennas 11a, 11b, 11c and the reception control unit 12.

  In the first and second embodiments, the reception control unit 12 may be configured to include the second ID code instead of the communication control unit 20. When the reception control unit 12 receives the second ID request signal, the reception control unit 12 does not output the demodulated signal corresponding to the second ID request signal to the communication control unit 20 and outputs the second ID signal including the second ID code that it has to the second ID. You may make it transmit using antenna 11a, 11b, 11c which received the request signal. That is, when receiving the second ID request signal, the reception control unit 12 acts like a conventional transponder chip, and automatically starts with the power stored in the power storage unit and transmits the second ID signal. Good. In this way, it is not necessary to drive the communication control unit 20, so that the power stored in the power storage unit can be used more effectively.

Next, the technical idea that can be grasped from the embodiment will be added below.
(1) In the portable device according to any one of claims 1 to 8, the diagnosis unit outputs a notification signal indicating a result of the diagnosis to the notification unit, and the notification unit outputs the notification signal. Send to the outside by radio wave.

  (2) In the portable device according to any one of claims 1 to 8, the diagnosis unit performs the diagnosis by using a demodulated signal of the first radio signal as an input to the communication control unit. To do.

  (3) In the portable device described in the technical idea (1) or the technical idea (2), the notification unit is activated when the notification signal is input and acts on the operator's five senses to that effect. It is an alarm device which reports.

  (4) A control device for controlling a predetermined control object based on mutual communication between the portable device according to any one of claims 1 to 8 and technical ideas (1) and (2) and the portable device. In the abnormality notification system, the portable device has at least one of the plurality of antennas and the presence / absence of a failure of at least one of the means for receiving and processing a radio signal received through the antennas When the failure signal is transmitted, the control device notifies the result of the diagnosis in the portable device. In each of the above embodiments, the abnormality notification system corresponds to the engine start control device 1.

The block diagram which shows schematic structure of the locking / unlocking device for vehicles in 1st and 2nd embodiment of this invention. The sequence diagram which shows the flow of the process between the receiving means and communication control means in 1st Embodiment. The sequence diagram which shows the flow of a process between the receiving means in 2nd Embodiment, a communication control means, and a diagnostic signal generation means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Portable machine, 5 ... Control apparatus, 11a ... X-axis antenna, 11b ... Y-axis antenna, 11c ... Z-axis antenna, 12 ... Reception control part, 20 ... Communication control means, diagnostic means, and notification means Communication control unit, 30... Pseudo signal generation circuit as means for applying a pseudo signal.

Claims (8)

A second radio that includes a plurality of antennas that receive a first radio signal transmitted from a control device that controls a predetermined control target through wireless communication, and that transmits a part of the plurality of antennas from the control device. The first radio signal received by the antenna is demodulated and output to the communication control means for controlling the mutual communication with the control device. The second radio signal received by the shared part of the antenna is automatically driven based on the electromagnetic energy of the radio signal and the response signal is transmitted to the control device via the shared antenna. A portable device that
Diagnostic means for diagnosing the presence or absence of failure of at least one of the plurality of antennas and the means for receiving and processing a radio signal received via the antennas, and the diagnostic object causes a failure And a notifying means for notifying that the device is out of order when it is diagnosed. Means for receiving and processing a radio signal received via the antenna; and a function of demodulating the first radio signal and outputting the demodulated signal to the communication control means; and electromagnetic energy of the second radio signal 2, comprising a single integrated circuit chip as a reception control unit, which is also provided with a function of automatically driving based on the transmission and transmitting a response signal to the control device via the shared antenna. Portable machine. The diagnosis means obtains at least the shared resonance frequency of the plurality of antennas through the reception control unit, and at least the shared portion of the plurality of antennas based on the obtained resonance frequency, and the reception The portable device according to claim 2, wherein the presence or absence of a failure of at least one of the control units is diagnosed. The diagnostic means includes means for applying a pseudo signal of the first radio signal to at least the shared part of the plurality of antennas, and an appropriate demodulated signal corresponding to the pseudo signal from the reception control unit 3. The portable device according to claim 2, wherein the presence or absence of a failure of at least one of the plurality of antennas and at least one of the reception control units is diagnosed based on whether or not the signal is obtained. The portable device according to claim 3 or 4, wherein the diagnosis unit performs the diagnosis using a period during which the first wireless signal is transmitted from the control device. The said alerting | reporting means transmits the diagnostic result by the said diagnostic means to the said control apparatus as a part of mutual communication between the said control apparatuses by the said communication control means. Portable machine. The portable device according to any one of claims 1 to 5, wherein the notification unit is configured to notify a diagnosis result of the diagnosis unit through the portable device itself. In the portable machine as described in any one of Claims 1-7,
And switching means for switching the shared antenna to another part of the plurality of antennas when the diagnostic module diagnoses that the shared antennas of the plurality of antennas are faulty. A portable device characterized by comprising.

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