JP2010070988A - On-board equipment and portable machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide on-board equipment and a portable machine, which can realize more stable motion by issuing data for verification by radio from a vehicle-mounted antenna and making the receiving judgement of response data returned from the portable machine in accordance with the delivery of the data for verification. <P>SOLUTION: The channel of the response data returned from the portable machine 2 is specified, and the data for verification which sends instructions to return the response data by the channel is issued from the transmitting antenna 10a. When it is judged that the response data delivered from the portable machine 2 in accordance with the delivery of the data for verification can not be received normally, the channel by which the response data is returned from the portable machine 2 is switched to a different channel, and the data for verification which sends instructions to return the response data by the channel is issued from the transmitting antenna 10a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention performs verification of a portable device by wirelessly transmitting verification data from an antenna mounted on a vehicle, and performing reception determination of response data returned from the portable device in response to the transmission of the verification data. The present invention relates to an in-vehicle device and a portable device.

As a device of this type, a vehicle that reads out a communication frequency suitable for the current location obtained from the GPS device from the map database and uses this communication frequency to communicate between the remote controller and the vehicle side device. There is a wireless lock device for use (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-292700

  However, noise that hinders communication between the remote controller and the vehicle-side device is not always constant at each point, and changes depending on the position and number of noise sources. In the configuration in which the communication frequency suitable for the point where the vehicle is located is determined using the map database as in the case of the apparatus, stable operation is not always realized.

  The present invention has been made in view of the above points, and an object thereof is to realize a more stable operation.

  In order to achieve the above object, according to the first aspect of the present invention, the verification data is wirelessly transmitted from the antenna mounted on the vehicle, and the response data returned from the portable device in response to the transmission of the verification data is received. An in-vehicle device that performs verification of a portable device by making a determination, and the portable device can return a response data by switching a plurality of channels having different frequencies, and is returned from the portable device. First verification data transmission means for specifying the response data channel and transmitting the verification data from the antenna to instruct the response data to be returned on the channel, and verification data by the first verification data transmission means When it is determined that the response data sent from the portable device is not normally received in response to the transmission, the response data channel returned from the portable device is changed. That change the channel, it is characterized by comprising a second matching data sending means for sending the verification data to be instructed to return the response data in the channel from the antenna.

  According to such a configuration, the channel of the response data returned from the portable device is specified, the verification data instructing the response data to be returned on the channel is transmitted from the antenna, and the verification data is transmitted. If it is determined that the response data sent from the mobile device is not received normally, the channel of the response data returned from the mobile device is changed to a different channel, and the verification is instructed to return the response data on that channel. Data is sent from the antenna, so if the response data is not normally received due to noise in the same frequency band as the response data, the response data is returned on a channel with a different frequency band, and the response data can be received normally. More stable operation can be realized.

  According to the second aspect of the invention, the portable device can return the response data by changing the output level, and responds to the sending of the collation data by the first collation data sending means. The reception status of the response data sent from the portable device is compared with the reception status of the response data sent from the portable device in response to the sending of the verification data by the second verification data sending means. When it is determined that the response data transmitted from the portable device in response to the transmission of the verification data by the second verification data transmission unit is not normally received by the channel identification unit for identifying the correct channel, the channel identification unit A third channel that sends out the verification data from the antenna instructing to return the response data by increasing the output level on the specified channel with good reception status. It is characterized by comprising a case data sending means.

  According to such a configuration, the reception status of the response data returned in each channel is compared to identify a channel with a good reception status, and the response data sent from the portable device in response to the sending of the verification data is If it is determined that the data is not received normally, it is a channel with good reception status, and the verification data instructing to return the response data with a high output level is sent from the antenna. It is possible to return response data with a good channel and high output level, and to receive response data more stably. Also, if the response data output level is always set to a high level, the battery of the portable device will be depleted, but if it is determined that the response data is not received normally, the response level is set to a higher output level. Since the verification data instructing to send back is sent, it is possible to suppress the battery consumption of the portable device.

  In the invention according to claim 3, when it is determined that the vehicle has stopped by the stop determination means for determining whether or not the vehicle has stopped, the portable device may return response data. Noise detecting means for detecting the presence / absence of noise of the same frequency for each possible channel and storing it in a storage medium, and the first verification data sending means is stored in the storage medium by the noise detection means Based on the information, a channel in which noise is not detected is identified as a channel of response data that is preferentially returned from the portable device.

  According to such a configuration, when it is determined that the vehicle has stopped, the presence or absence of noise of the same frequency is detected and stored in the storage medium for each channel to which the portable device can return response data. Based on the information stored in the storage medium, a channel in which noise is not detected is identified as a channel of response data that is preferentially returned from the portable device, and verification that instructs the response data to be returned on this channel Therefore, the response data is returned from the portable device through a channel with less influence of noise, and the period required for collation can be shortened.

  Further, the invention according to claim 4 estimates a channel that is likely to receive response data normally based on the reception status of response data returned from the portable device in response to transmission of verification data, and Channel storage means for storing information for specifying the information in the storage medium, and the first verification data sending means is a channel that is highly likely to normally receive response data based on the information stored in the storage medium. It is characterized in that verification data for instructing to return response data is transmitted from the antenna.

  According to such a configuration, a channel that is likely to normally receive response data is estimated based on the reception status of the response data, information for specifying the channel is stored in the storage medium, and the storage medium Based on the information stored in the data, it is possible to send the verification data from the antenna to instruct the response data to be returned on the channel that is likely to receive the response data normally. Response data is sent from the portable device through a high channel, and the time required for verification can be shortened.

  According to the fifth aspect of the present invention, the verification data is sent using a plurality of antennas provided in each part of the vehicle, and reception determination of response data returned from the portable device in response to the sending of the verification data is performed. Is a vehicle-mounted device capable of collating portable devices for a plurality of collation areas, and the channel storage means sends out the collation data from the portable device for each collation area. A channel that is likely to receive the response data normally based on the reception status of the response data is stored, information for specifying the channel is stored in the storage medium, and the first verification data sending means includes: Based on the information stored in the storage medium, the verification data for instructing the response data to be returned on the channel that is likely to receive the response data normally for each verification area is sent from the antenna. It is characterized in that is delivered.

  If there is a noise source near the portable device and the noise generated from this noise source interferes with the response data sent from the portable device, the response data sent from the portable device may be stabilized depending on the verification area. However, as described above, there is a high possibility that the response data is normally received based on the reception status of the response data transmitted from the portable device in response to the transmission of the verification data for each verification area. Estimate the channel, store the information for identifying the channel in the storage medium, and return the response data on the channel that is highly likely to normally receive the response data for each verification area based on the information stored in the storage medium By sending verification data instructed to be sent from the antenna, response data sent from the portable device can be received more stably. It is possible.

  The invention according to claim 6 returns response data to the in-vehicle device when the verification data including the same identification information as the identification information assigned to itself is received from the in-vehicle device mounted on the vehicle. The portable device has a channel switching function of switching a plurality of channels having different frequencies and returning response data in accordance with an instruction of verification data received from the in-vehicle device.

  According to such a configuration, it has a channel switching function of switching a plurality of channels having different frequencies and returning response data in accordance with the instruction of the verification data received from the in-vehicle device, so that it is not affected by noise. It is possible to send back response data using the channel.

  The invention described in claim 7 is characterized in that it has an output level changing function for returning response data at different output levels in accordance with the instruction of the data for verification received from the in-vehicle device.

  According to such a configuration, it has an output level changing function for returning response data at different output levels in accordance with the instruction of the verification data received from the in-vehicle device, so that the response data can be used without consuming unnecessary power. Can be transmitted at a high output level.

(First embodiment)
FIG. 1 shows the configuration of an in-vehicle device according to an embodiment of the present invention. The in-vehicle device 1 includes transmission antennas 10a to 10g, a tuner 20, and a smart ECU 30. The in-vehicle device 1 wirelessly transmits a command (hereinafter referred to as verification data) from the antennas 10a to 10g mounted on the vehicle, and transmits response data returned from the portable device 2 in response to the transmission of the verification data. By performing reception determination, the portable device 2 is verified.

  The transmitting antennas 10a to 10g are used as a D-seat exterior antenna, a DR seat exterior antenna, a P seat exterior antenna, a PR seat exterior antenna, a vehicle interior front antenna, a vehicle interior rear antenna, and a back door external antenna, respectively. .

  FIG. 2 shows the relationship between the transmitting antennas 10a to 10g and the collation area. The transmission antenna 10a is the collation area A, the transmission antenna 10b is the collation area B, the transmission antenna 10c is the collation area C, the transmission antenna 10d is the collation area D, the transmission antenna 10e is the collation area E, and the transmission antenna 10f is the collation In the area F, the transmitting antenna 10g uses the collation area G as a collation area.

  The in-vehicle device 1 can sequentially perform collation of the portable device 2 with each of the collation areas A to G as a collation target.

  The tuner 20 is for receiving response data returned from the portable device 2. The tuner 20 is turned on and off in accordance with a control command from the smart ECU 30.

  The smart ECU 30 is configured as a computer including a CPU, a memory, an I / O, and the like, and the CPU performs various processes according to a program stored in the memory.

  Further, a vehicle speed signal (not shown) is input from the vehicle to the smart ECU 30, and a signal corresponding to a user operation is input from a door handle and a lock switch (none of which are shown) provided on the vehicle door. It has come to be.

  When the smart ECU 30 performs collation of the portable device 2, the smart ECU 30 sends collation data including the key ID of the portable device 2.

  The portable device 2 is used as an electronic key of a vehicle, and has a transmission / reception antenna and a battery (both not shown).

  A unique key ID is assigned to the portable device 2, and the portable device 2 includes its own key ID when receiving verification data including the same key ID as its own key ID from the smart ECU 30. Response data is sent out.

  The portable device 2 in the present embodiment includes a channel switching unit (not shown) that switches two channels (CH1, CH2) having different frequencies in accordance with an instruction of the verification data sent from the smart ECU 30, and this channel switching unit Accordingly, the response data is returned by switching two channels (CH1, CH2) having different frequencies.

  In addition, the portable device 2 in the present embodiment has a level switching unit that switches the output level in accordance with an instruction of the verification data sent from the smart ECU 30, and the output level is switched between the normal level and the high output level by the level switching unit. It is possible to return response data by switching to

  The smart ECU 30 reads the key ID of the portable device 2 for the vehicle 1 stored in the memory, sends the verification data including the key ID of the portable device 2, and the portable device according to the transmission of the verification data. 2 to check whether the response data is received or not.

  In addition, the smart ECU 30 designates a channel of response data returned from the portable device 2 and sends collation data instructing the response data to be returned on the channel from the transmission antennas 10a to 10g. The response data can be returned on the channel designated by 2.

  Further, the smart ECU 30 specifies the output level of the response data returned from the portable device 2, and sends the verification data from the transmitting antennas 10a to 10g to instruct to return the response data at the output level. The response data can be returned at the output level instructed from the portable device 2.

  Further, the smart ECU 30 has a noise detection circuit (not shown) that detects the presence or absence of each noise of CH1 and CH2, and can detect the presence or absence of each noise of CH1 and CH2 using this noise detection circuit. It has become.

  The in-vehicle device 1 according to the present embodiment recognizes noise with respect to a frequency used by the portable device 2 for returning response data, so that there is noise on the channel (CH1, CH2) of the portable device 2 at the point where the vehicle stops. Is detected and stored in the memory.

  FIG. 3 shows a flowchart of this process. The smart ECU 30 starts the process shown in FIG. 3 when the battery power (+ B) of the vehicle is supplied.

  First, it is determined whether the vehicle has stopped based on the vehicle speed signal (S100). Specifically, it is determined whether or not the vehicle is moving based on the vehicle speed signal.

  Here, when the vehicle is traveling, the determination in S100 is NO, and the determination in S100 is repeated.

  When the vehicle stops, the determination in S100 is YES and the tuner 20 is turned on (S102). Specifically, a control command for instructing power-on is sent to tuner 20.

  Next, the presence or absence of each noise of each channel (CH1, CH2) is detected (S104). Specifically, the presence or absence of each channel noise is detected based on whether or not noise larger than a predetermined threshold is detected in the frequency band of each channel by the noise detection circuit.

  Next, the presence or absence of noise is stored in the memory (S106). Specifically, the presence / absence of noise for CH1 and the presence / absence of noise for CH2 are stored separately in the memory.

  Next, the power source of the tuner 20 is turned off (S108). Specifically, a control command for instructing power off is sent to the tuner 20 and the process returns to S100.

  Through the processing described above, the presence or absence of noise in the frequency band of each channel at the point where the vehicle stops is stored in the memory.

  Further, the in-vehicle device 1 according to the present embodiment specifies a channel in which noise is not detected as a channel of response data that is preferentially returned from the portable device 2 based on the information stored in the memory by the above processing. When the response data is instructed to be returned on the channel and it is determined that the response data is not normally received, the channel of the response data returned from the portable device 2 is changed to a different channel, and the response is made on the channel. A collation process is performed in which collation is performed by instructing data to be returned.

  FIG. 4 shows a flowchart of the collation process. FIG. 5 shows a timing chart of this collation process. Hereinafter, the matching process will be described with reference to this timing chart.

  When the smart ECU 30 determines that the user has operated the door handle or the lock switch based on a signal input from the door handle or the lock switch of the vehicle, the smart ECU 30 starts the process shown in FIG. Here, a case where collation data is transmitted from the transmission antenna 10a and collation for the collation area A is performed will be described.

  First, data is read from the memory (S200). In the present embodiment, information indicating the presence or absence of noise in the frequency band of each channel stored in the memory by the process shown in FIG. 3 is read.

  Next, the channel of response data is specified (S202). Specifically, based on information read from the memory, a channel in which noise is not detected is identified as a channel of response data that is preferentially returned from the portable device 2. For example, when noise is detected in the CH2 frequency band and no noise is detected in the CH1 frequency band, CH1 is specified as a response data channel returned from the portable device 2. If no noise is detected in the frequency bands of both channels, or if noise is detected in the frequency bands of both channels, a predetermined channel (for example, CH1) is returned from the portable device 2. Specified as the response data channel.

  Next, the power source of the tuner 20 is turned on (S204), and collation data instructing to return response data on the channel specified in the previous 202 is sent from the transmission antenna 10a (S206). Here, as shown in FIG. 5, it is assumed that the verification data instructing to return the response data from the portable device 2 at CH1 and the normal level is transmitted.

  Next, it is determined whether or not the response data sent from the portable device 2 has been normally received in response to the sending of the verification data (S208).

  Here, if the response data is normally received, the determination in S208 is YES and collation is performed (S210). Specifically, collation is performed by determining the key ID included in the response data.

  When the collation is completed, the tuner 20 is turned off (S212), and this process is terminated.

  Also, as shown in FIG. 5, when noise in each frequency band of CH2 and CH1 is generated during reception of response data, and a part of the response data becomes reception NG due to the noise of CH1, the determination in S208 Becomes NO, and then the number of normally received bits is stored (S214). Specifically, the number of bits that could not be normally received is estimated, and a value obtained by subtracting the number of bits that could not be normally received from the number of bits that should be received is stored in the memory as the number of bits that were normally received. For example, when it is estimated that 5 bits out of the total number of bits of the response data cannot be normally received, (total number of bits−5) is stored in the memory.

  Next, the response data channel is changed (S216). Here, as shown in FIG. 5, the channel of the response data is changed to CH2.

  Next, collation data instructing to return response data on the channel changed in the previous S214 is transmitted from the transmission antenna 10a (S218). That is, the verification data instructing to return the response data from the portable device 2 at CH2 and the normal level is transmitted.

  Then, it is determined again whether or not the response data sent from the portable device 2 is normally received in response to the sending of the verification data (S220).

  Here, if the response data is normally received, the determination in S220 is YES, and in the same manner as in S210, collation is performed (S222). When collation is completed, the tuner 20 is turned off (S224). The process ends.

  Also, as shown in FIG. 5, when noise in the CH2 frequency band is generated during reception of response data, and a part of the response data becomes reception NG due to this CH2 noise, the determination in S208 is NO. As in S214, the number of normally received bits is stored (S226).

  Next, the number of normally received bits stored in the memory in S214 and the number of normally received bits stored in the memory in S226 are compared to identify a channel with good reception status (S228). In the present embodiment, a channel with a large number of bits received normally is identified as a channel with a good reception status. Here, it is assumed that CH1 is specified as a channel with good reception status.

  Then, the verification data for instructing to return the response data at a high output level with a channel having a good reception condition is transmitted from the antenna 10a (S230). As a result, response data of a high output level is returned from the portable device 2 through a channel with good reception conditions.

  Then, it is determined again whether or not the response data sent from the portable device 2 is normally received in response to the sending of the verification data (S232).

  Here, as shown in FIG. 5, even when noise in the frequency band of CH2 occurs during the reception of response data, if the response data is normally received with the response data of the high output level, the determination in S232 is YES. As in S210 and S222, the collation is performed (S234). When the collation is completed, the tuner 20 is turned off (S236), and this process is terminated.

  If the response data is not normally received, the tuner 20 is turned off (S238), and the process is terminated.

  In addition, when it is necessary to collate the portable device 2 with respect to another collation area, the above-described process is performed similarly for the other collation areas.

  According to the above configuration, the channel of response data returned from the portable device is specified, the verification data instructing to return response data on the channel is transmitted from the antenna, and the verification data is sent When it is determined that the response data sent from the portable device is not received normally, the channel of the response data sent back from the portable device is changed to a different channel, and for verification to send the response data back on that channel Since the data is sent from the antenna, if the response data is not normally received due to noise in the same frequency band as the response data, the response data is returned on a channel with a different frequency band, and the response data can be received normally. More stable operation can be realized.

  In addition, the reception status of the response data returned by each channel is compared to identify the channel with good reception status, and the response data sent from the portable device in response to sending the verification data is not received normally Since the verification data for sending the response data with a high output level is sent from the antenna, it is sent from the portable device with a channel with a good reception status. In addition, the response data is returned by raising the output level, and the response data can be received more stably. Also, if the response data output level is always set to a high level, the battery of the portable device will be depleted, but if it is determined that the response data is not received normally, the response level is set to a higher output level. Since the verification data instructing to send back is sent, it is possible to suppress the battery consumption of the portable device.

  In addition, when it is determined that the vehicle has stopped, the presence or absence of noise of the same frequency is detected for each channel to which the portable device can return response data, and the channel in which noise is not detected is given priority. Since it is specified as a channel of response data returned from the portable device, and verification data is sent to instruct the response data to be returned on this channel, the response data is returned from the portable device first on the channel with less noise influence. It is possible to shorten the period required for verification.

  In addition, the portable device has a channel switching function for switching response channels and returning response data according to the verification data received from the in-vehicle device. Can be used to send back response data.

  In addition, the portable device has an output level changing function that returns response data at different output levels in accordance with the instruction of the verification data received from the in-vehicle device, so that the response data can be increased without consuming unnecessary power. It is possible to send at the output level.

(Second Embodiment)
In the first embodiment, the processing shown in FIG. 3 is performed, the presence / absence of noise in the frequency band of each channel at the point where the vehicle stops is stored in the memory, and the noise is determined based on the information stored in the memory. In the present embodiment, the channel in which the channel is not detected is specified as the channel of the response data returned from the portable device 2 preferentially and the response data is instructed to be returned on the channel. A channel that is likely to receive response data normally from the reception status of response data returned from the portable device 2 without performing the processing shown in FIG. And instructing the response data to be sent back on the channel stored in the memory at the next verification.

  In addition, the structure of the vehicle-mounted apparatus 1 and the portable device 2 which concern on this embodiment is the same as what was shown in 1st Embodiment. Further, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, different parts will be mainly described.

  FIG. 6 shows a flowchart of verification processing by the smart ECU 30 according to this embodiment.

  The smart ECU 30 first reads data from the memory (S200). In this embodiment, in subsequent S209, S213, S221, and S225, it is stored in the memory as a channel to be transmitted first in the next collation, and first in the next collation stored in this memory. Read the channel to be transmitted.

  Next, the channel of response data is specified (S202). Specifically, the channel of the response data is specified according to the channel that is first transmitted in the next verification read from the memory. If the channel to be transmitted first in the next verification is not stored in the memory, a predetermined channel (for example, CH1) is specified as the response data channel.

  Next, the tuner 20 is turned on (S204), the channel of the identified response data is designated and collation data is sent (S206), and the response sent from the portable device 2 in response to the sending of the collation data It is determined whether the data has been received normally (S208).

  Here, if the response data is normally received, the determination in S208 is YES, and the channel that has normally received the response data is stored in the memory as the channel to be transmitted first in the next verification (S209).

  Next, collation is performed (S210). When collation is completed, the power of the tuner 20 is turned off (S212), and this process ends.

  If the response data is not normally received, the determination in S208 is NO, and a channel different from the channel for which this response data has not been normally received is stored in the memory as a channel to be transmitted first in the next verification ( S213).

  Next, the number of bits received normally is stored (S214), the response data channel is changed (S216), and the verification data is transmitted to instruct the response data to be returned on the channel changed in the previous S214. It is transmitted from the antenna 10a (S218), and it is determined again whether or not the response data transmitted from the portable device 2 is normally received in response to the transmission of the verification data (S220).

  Here, if the response data is normally received, the determination in S220 is YES, and the channel that has normally received the response data is stored in the memory as the channel to be transmitted first in the next verification (S221).

  Next, collation is performed (S222), and when collation is completed, the tuner 20 is turned off (S224), and this process is terminated.

  If the response data is not normally received, the determination in S220 is NO, and a channel different from the channel for which this response data has not been normally received is stored in the memory as a channel to be transmitted first in the next verification ( S225).

  Next, similarly to S214, the number of normally received bits is stored in the memory (S226), the number of normally received bits stored in the memory in S214 and the number of normally received bits stored in the memory in S226. And a channel with good reception status is identified (S228).

  Next, collation data instructing to return response data at a high output level with a channel having a good reception condition is sent from the antenna 10a (S230), and it is carried again according to the sending of the collation data. It is determined whether or not the response data sent from the machine 2 has been normally received (S232).

  Here, if the response data is normally received, the determination in S232 is YES, and the channel that has normally received the response data is stored in the memory as the channel to be transmitted first in the next verification (S233).

  Next, collation is performed (S234). When collation is completed, the power of the tuner 20 is turned off (S236), and this process is terminated.

  If the response data is not normally received, the determination in S232 is NO, and a channel different from the channel for which this response data was not normally received is stored in the memory as a channel to be transmitted first in the next verification ( (S237) After turning off the power of the tuner 20 (S236), this process is terminated.

  In the present embodiment, the same processing as that described above is performed for other verification areas. Thus, when collating the portable device 2 with respect to a plurality of collation areas, the channel to be transmitted first in the next collation is stored in the memory for each collation area, and in S200, the memory is stored in the memory for each collation area. Based on the stored information, collation data instructing to return the response data on a channel that is likely to receive the response data normally is sent.

  When there is a noise source near the portable device 2 and the noise generated from the noise source interferes with the response data transmitted from the portable device 2, the response data transmitted from the portable device 2 depending on the collation area. However, as described above, for each verification area, the response data is returned on a channel that is likely to receive the response data normally based on the information stored in the memory. By instructing, it is possible to stably receive response data sent from the portable device 2.

  According to the configuration described above, a channel that is likely to normally receive response data is estimated based on the reception status of the response data, information for specifying the channel is stored in the storage medium, and the storage medium is stored in the storage medium. Based on the stored information, it is possible to send the response data from the antenna instructing the response data to be returned on the channel that is likely to receive the response data normally. Response data is sent from the portable device through the channel, and the period required for verification can be shortened.

(Other embodiments)
In the first and second embodiments, the number of bits normally received when the response data returned on CH1 is NG and the case where the response data returned on CH2 is NG are received. The number of bits received normally is stored in each memory, and the configuration for identifying a channel with good reception status from the number of bits stored in this memory is shown, but it is not limited to such a configuration, Other methods may be used to identify channels with good reception conditions.

  In the first and second embodiments, the tuner is installed in the passenger compartment, and the response data from the portable device is received using the tuner. However, the present invention is not limited to such a configuration. Instead, for example, a plurality of tuners may be installed in the vehicle, such as a passenger compartment and a trunk room, and matching may be performed by switching the tuner to be used according to the matching area.

  In the first and second embodiments, the portable device 2 switches the two channels (CH1, CH2) having different frequencies and returns the response data. However, three or more channels having different frequencies are shown. The response data may be returned by switching.

  In the first and second embodiments, the portable device 2 returns the response data at different output levels (normal level and high output level), but the output level is changed in more stages. Response data may be returned.

  The correspondence relationship between the configuration in the above embodiment and the configuration of the claims will be described. S202 and S206 correspond to the first verification data transmission means, and S208, S216 and S218 correspond to the second verification data. S214, S226, and S228 correspond to channel identification means, S220 and S230 correspond to third verification data transmission means, S100 corresponds to stop determination means, and S104 and S106 detect noise. S209, S213, S221, and S225 correspond to channel storage means.

It is a figure which shows the structure of the vehicle-mounted apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the relationship between each transmission antenna and a collation area. It is a flowchart which shows the process which detects the presence or absence of the noise with respect to the use channel of a portable machine, and memorize | stores it in memory. It is a flowchart of the collation process which concerns on 1st Embodiment. Timing chart of verification processing according to the first embodiment It is a flowchart of the collation process which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Portable machine 10a-10g Transmission antenna 20 Tuner 30 Smart ECU

Claims (7)

This is an in-vehicle device that performs collation of a portable device by wirelessly transmitting the collation data from an antenna mounted on the vehicle and performing a reception determination of response data returned from the portable device in response to the transmission of the collation data. And
The portable device is capable of returning the response data by switching a plurality of channels having different frequencies,
A first verification data sending means for identifying the channel of the response data returned from the portable device and sending the verification data from the antenna to instruct the channel to return the response data;
The response data returned from the portable device when it is determined that the response data transmitted from the portable device is not normally received in response to the transmission of the verification data by the first verification data transmission means And a second verification data transmission means for transmitting verification data from the antenna to instruct the channel to change the channel to a different channel and return the response data on the channel. apparatus. The portable device can return the response data by changing the output level,
The reception status of the response data transmitted from the portable device in response to the transmission of the verification data by the first verification data transmission means, and the transmission of the verification data by the second verification data transmission means According to the channel identification means for comparing the reception status of the response data sent from the portable device and identifying a channel with a good reception status;
When it is determined that the response data transmitted from the portable device is not normally received in response to the transmission of the verification data by the second verification data transmission means, the reception status specified by the channel specifying means And a third verification data transmission means for transmitting verification data from the antenna for instructing to return the response data at a higher output level. The in-vehicle device according to claim 1. Stop determination means for determining whether or not the vehicle has stopped;
When it is determined by the stop determination means that the vehicle has stopped, the presence or absence of noise of the same frequency is detected and stored in a storage medium for each channel to which the portable device can return the response data. Noise detection means,
The first verification data sending means preferentially sends back the channel from which the noise is not detected based on the information stored in the storage medium by the noise detecting means from the portable device. The in-vehicle device according to claim 1 or 2, characterized by being specified as a channel. Based on the reception status of the response data returned from the portable device in response to the transmission of the verification data, a channel that is likely to receive the response data normally is estimated, and information for specifying the channel is obtained. Channel storage means for storing in a storage medium,
The first verification data sending means sends verification data for instructing to return the response data on a channel that is highly likely to normally receive the response data based on the information stored in the storage medium. The in-vehicle device according to claim 1, wherein the vehicle is transmitted from the antenna. By sending the verification data using a plurality of antennas provided in each part of the vehicle, and performing reception determination of response data returned from the portable device in response to the transmission of the verification data, a plurality of verification areas can be obtained. An in-vehicle device capable of collating a target portable device,
The channel storage means estimates a channel that is likely to normally receive the response data based on a reception status of the response data transmitted from the portable device in response to transmission of the verification data for each verification area. And storing information for identifying the channel in a storage medium,
The first collation data sending means instructs to return the response data on a channel that is highly likely to normally receive the response data for each collation area based on the information stored in the storage medium. The in-vehicle device according to claim 4, wherein the verification data to be transmitted is transmitted from the antenna. From the in-vehicle device mounted on the vehicle, when receiving verification data including the same identification information as the identification information assigned to itself, the portable device returns response data to the in-vehicle device,
A portable device having a channel switching function of switching a plurality of channels having different frequencies and returning the response data in accordance with an instruction of the verification data received from the in-vehicle device.   The portable device according to claim 6, further comprising an output level changing function for returning the response data at a different output level in accordance with an instruction of the verification data received from the in-vehicle device.

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