JP2016023535A - Communication system for vehicle and on-vehicle apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system for a vehicle and an on-vehicle apparatus capable of opening or closing a vehicle door by moving a portable machine through a prescribed route even in a constitution where the portable machine does not have an acceleration sensor.SOLUTION: A communication system for a vehicle includes an on-vehicle apparatus 1 transmitting a position detection signal, and a portable machine 2 receiving the position detection signal and transmitting a response signal in accordance with the position detection signal. The on-vehicle apparatus 1 includes a specification section for specifying a position change of the portable machine 2 to a vehicle C on the basis of the received response signal, a storage section for storing a prescribed position change of the portable machine 2 to the vehicle C, a comparison section for comparing the position change specified by the specification section and the prescribed position change stored by the storage section, and an output section for outputting a door open instruction signal for instructing to automatically open a vehicle door or a door close instruction signal for instructing to automatically close the vehicle door in response to a comparison result of the comparison section.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle communication system and an in-vehicle device that output a door opening instruction signal for instructing automatic opening of a vehicle door or a door closing instruction signal for instructing automatic closing of a vehicle door.

  There is a vehicle door control system that automatically opens a vehicle door when a response signal from a portable device to a request signal periodically transmitted from an in-vehicle device is continuously received for a predetermined time or longer (for example, Patent Document 1). .

  In addition, there is a vehicle locking / unlocking system that includes an acceleration sensor in the portable device and unlocks the vehicle door when the movement of the portable device detected by the acceleration sensor matches the movement of the portable device registered in advance ( For example, Patent Document 2).

JP 2006-328932 A Japanese Patent No. 4649273

  However, in the vehicle door control system disclosed in Patent Document 1, the user who holds the portable device determines whether or not the automatic door opening is necessary only by the time in the vicinity of the vehicle. On the contrary, there is a problem that the vehicle door opens. For example, even if there is no intention of getting on and off and loading and unloading luggage, the vehicle door may be opened only by a user in the vicinity of the vehicle.

  In the vehicle locking / unlocking system disclosed in Patent Document 2, the vehicle door is not unlocked against the intention of the user, but it is necessary to provide an acceleration sensor in the portable device, which increases the cost. .

  An object of the present application is to provide a vehicle communication system and an in-vehicle device capable of automatically opening or closing a vehicle door by moving the portable device along a predetermined route even when the portable device is not provided with an acceleration sensor. Is to provide.

  A vehicle communication system according to an aspect of the present invention includes an in-vehicle device having an in-vehicle transmission unit that transmits a position detection signal, a response signal that receives the position detection signal, and that receives the received position detection signal The vehicle-mounted device is based on the response signal received from the portable device, and the door opening instruction signal for instructing automatic opening of the vehicle door or the door closing instruction for instructing automatic closing A vehicle communication system that outputs a signal, wherein the in-vehicle device specifies a position change of the portable device relative to the vehicle based on the received response signal, and a predetermined unit of the portable device relative to the vehicle. A storage unit that stores a change in position, a comparison unit that compares the change in position specified by the specifying unit and the predetermined change in position stored in the storage unit, and the opening finger according to a comparison result by the comparison unit And an output unit for outputting a signal or the closing command signal.

  When the vehicle-mounted device according to one aspect of the present invention transmits a position detection signal and receives a response signal transmitted from the portable device in accordance with the position detection signal, the vehicle-mounted device is based on the received response signal. A vehicle-mounted device that outputs a door opening instruction signal for instructing to automatically open a door or a door closing instruction signal for instructing to automatically close the door, and based on the received response signal, the position change of the portable device with respect to the vehicle A storage unit that stores a predetermined position change of the portable device relative to the vehicle, and a comparison unit that compares the position change specified by the specification unit and the predetermined position change stored by the storage unit. And an output unit that outputs the door opening instruction signal or the door closing instruction signal according to a comparison result by the comparison unit.

  Note that the present application can be realized not only as a vehicle communication system, an in-vehicle device, and a portable device including such a characteristic processing unit, but also as a vehicle communication method using such characteristic processing as a step. The program can be realized as a program for causing a computer to execute such steps. Also, it may be realized as a semiconductor integrated circuit that realizes part or all of a vehicle communication system, an in-vehicle device and a portable device, or may be realized as another system including a vehicle communication system, an in-vehicle device and a portable device. it can.

  According to the above, a vehicle communication system and an in-vehicle device capable of automatically opening or closing a vehicle door by moving the portable device along a predetermined route even if the portable device does not include an acceleration sensor. Can be provided.

1 is a schematic diagram illustrating a configuration example of a vehicle communication system according to a first embodiment. It is a block diagram which shows the example of 1 structure of vehicle equipment. It is a block diagram which shows one structural example of a portable device. It is a conceptual diagram which shows an example of a predetermined position change. It is a conceptual diagram which shows the other example of a predetermined position change. It is a flowchart which shows the process sequence which concerns on the detection of the portable device for door opening operation. It is a flowchart which shows the process sequence which concerns on an opening process. It is a flowchart which shows the process sequence which concerns on the detection of the portable device for opening / closing operation. It is a flowchart which shows the process sequence which concerns on a door closing process.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described. Moreover, you may combine arbitrarily at least one part of embodiment described below.

(1) A vehicle communication system according to one aspect of the present invention includes an in-vehicle device having an in-vehicle transmission unit that transmits a position detection signal, the position detection signal, and the received position detection signal. A vehicle-mounted device that transmits a response signal, and the vehicle-mounted device is based on the response signal received from the portable device, and instructs to automatically open or close the vehicle door. A vehicle communication system that outputs a door closing instruction signal, wherein the in-vehicle device specifies a position change of the portable device relative to the vehicle based on the received response signal, and the portable device for the vehicle According to the comparison result by the comparison unit, the comparison unit that compares the storage unit that stores the predetermined position change, the position change specified by the specifying unit and the predetermined position change stored by the storage unit, Door instruction signal or an output unit for outputting the closing instruction signal.

According to this aspect, the vehicle-mounted device transmits a position detection signal for detecting the position of the portable device. The portable device that has received the position detection signal transmitted from the in-vehicle device transmits a response signal corresponding to the position detection signal to the in-vehicle device. The response signal is for specifying the position or position change of the portable device relative to the in-vehicle device.
The specifying unit of the in-vehicle device receives the response signal and specifies the position change of the portable device based on the received response signal. Since the position detection signal is transmitted and the portable device is configured to transmit a response signal corresponding to the position detection signal, the specifying unit can specify a change in the position of the portable device. The change in the position of the portable device corresponds to the opening or closing operation of the vehicle door by the user. The storage unit stores a predetermined position change of the portable device with respect to the vehicle as an operation condition for opening or closing the vehicle door. The comparison unit compares the position change of the portable device specified by the specifying unit based on the response signal and the predetermined position change stored in the storage unit, and the output unit according to the comparison result by the comparison unit, A door opening instruction signal for instructing automatic opening of the vehicle door or a door closing instruction signal for instructing automatic closing is output. For example, when the position change of the portable device specified by the specifying unit and the predetermined position change stored in the storage unit match or are similar, the output unit outputs a door opening instruction signal for instructing to automatically open the vehicle door. Output. Similarly, when the position change of the portable device specified by the specifying unit and the predetermined position change stored in the storage unit match or are similar, the output unit instructs the vehicle door to be closed automatically. Can also be configured to output.
Thus, according to this aspect, the position change of the portable device relative to the in-vehicle device can be specified without providing the portable device with an acceleration sensor, and the vehicle door can be opened by moving the portable device along a predetermined route. The door or the door can be operated.

(2) It is preferable that the predetermined position change includes a position change along an annular path of the portable device.

  According to this aspect, the predetermined position change stored in the storage unit includes a position change along an annular path. The annular route is a route that is unlikely to move the portable device against the user's will. Accordingly, it is possible to effectively prevent the vehicle door from automatically opening or closing against the user's will.

(3) It is preferable that the predetermined position change includes a position change along a path bent in the middle of the portable device.

  According to this aspect, the predetermined position change stored in the storage unit includes a position change along a path bent in the middle. The route that is bent along the way is a route that is unlikely to move the portable device against the intention of the user. Accordingly, it is possible to effectively prevent the vehicle door from automatically opening or closing against the user's will.

(4) The in-vehicle transmission unit intermittently transmits a processing start signal at a low cycle, and when the portable device receives the processing start signal, a predetermined signal is transmitted to the in-vehicle device, The on-vehicle transmission unit preferably transmits the position detection signal intermittently at a high cycle when the on-vehicle device receives the predetermined signal.

  According to this aspect, the in-vehicle transmission unit intermittently transmits a process start signal at a low cycle, and when the portable device receives the process start signal, the vehicle-mounted transmitter transmits a predetermined signal to the portable device. The in-vehicle device can recognize the presence of the portable device by receiving the predetermined signal transmitted from the portable device. The in-vehicle transmission unit intermittently transmits the position detection signal at a high cycle when the in-vehicle device receives the predetermined signal. Therefore, the position change of the portable device can be specified in more detail. Therefore, it is possible to effectively prevent the vehicle door from automatically opening or closing against the user's will.

(5) The vehicle-mounted device transmits the position detection signal from a plurality of antennas provided in the vehicle, and the portable device measures the received signal strength of each received position detection signal. A reception signal strength measurement unit; and a portable transmission unit that transmits the response signal including the reception signal strength measured by the reception signal strength measurement unit to the in-vehicle device, wherein the specifying unit is included in the response signal A configuration that includes a position detection unit that detects the position of the portable device with respect to the in-vehicle device based on the received signal strength, and that specifies a position change detected by the position detection unit is preferable.

According to this aspect, the vehicle-mounted device transmits the position detection signal from the plurality of antennas provided in the vehicle. The portable device measures the received signal strength of the position detection signal transmitted from each antenna by the received signal strength measuring unit, and the portable device transmitting unit transmits a response signal including the measured received signal strength to the in-vehicle device. The received signal strength of the position detection signals transmitted from the plurality of antennas in the portable device is for two-dimensionally or three-dimensionally detecting the position of the portable device with respect to the in-vehicle device. The specifying unit detects the position of the portable device relative to the in-vehicle device based on the received signal strength included in the response signal, and specifies the change in the position of the portable device two-dimensionally or three-dimensionally.
Therefore, the opening or closing of the vehicle door can be operated by moving the portable device two-dimensionally or three-dimensionally along a predetermined route.

(6) The vehicle-mounted device transmits the position detection signal from a plurality of antennas provided in the vehicle, and the portable device measures the received signal strength of each received position detection signal. Based on the received signal strength measured by the received signal strength measuring unit, the received signal strength measuring unit, a position detecting unit that detects the position of the portable device with respect to the in-vehicle device, and a position detected by the position detecting unit And a portable transmission unit that transmits the response signal to the in-vehicle device, and the specifying unit preferably specifies a position change included in the response signal.

According to this aspect, the vehicle-mounted device transmits the position detection signal from the plurality of antennas provided in the vehicle. The portable device measures the received signal strength of the position detection signal transmitted from each antenna by the received signal strength measuring unit, and the position detecting unit determines the position of the portable device relative to the in-vehicle device based on the measured received signal strength. To detect. The received signal strength of the position detection signals transmitted from the plurality of antennas in the portable device is for two-dimensionally or three-dimensionally detecting the position of the portable device with respect to the in-vehicle device. Then, the portable device transmits a response signal including the detected position to the in-vehicle device. The specifying unit specifies a change in the position of the portable device two-dimensionally or three-dimensionally based on the response signal.
Therefore, the opening or closing of the vehicle door can be operated by moving the portable device two-dimensionally or three-dimensionally along a predetermined route.

(7) When the vehicle-mounted device according to one aspect of the present invention transmits a position detection signal and receives a response signal transmitted from the portable device in accordance with the position detection signal, the vehicle-mounted device is based on the received response signal. An in-vehicle device that outputs a door opening instruction signal for instructing to automatically open the vehicle door or a door closing instruction signal for instructing to automatically close the vehicle door, the portable device for the vehicle based on the received response signal A position change unit that identifies a change in position of the portable device, a storage unit that stores a predetermined change in position of the portable device relative to the vehicle, a position change specified by the determination unit, and a change in position stored in the storage unit A comparing unit that outputs the door opening instruction signal or the door closing instruction signal according to a comparison result by the comparing unit.

  According to this aspect, similarly to aspect (1), the position change of the portable device relative to the vehicle-mounted device can be specified without providing the acceleration sensor in the portable device, and the vehicle can be moved by moving the portable device along a predetermined route. The door can be opened or closed.

[Details of the embodiment of the present invention]
A specific example of a vehicle communication system according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

(Embodiment 1)
FIG. 1 is a schematic diagram illustrating a configuration example of a vehicle communication system according to the first embodiment. The vehicle communication system according to the first embodiment is configured between an in-vehicle device 1 that transmits and receives various signals using a plurality of LF transmitting antennas 3 and RF receiving antennas 4 provided in the vehicle C, and the in-vehicle device 1. And a portable device 2 that transmits and receives the signal. The in-vehicle device 1 identifies the position change of the portable device 2 and automatically opens the automatic sliding door D when the position change of the portable device 2 matches a predetermined position change.
The plurality of LF transmission antennas 3 include, for example, a first LF transmission antenna 31 disposed on the driver side pillar, a second LF transmission antenna 32 disposed on the passenger side pillar, and a third LF disposed on the rear portion of the vehicle C. The transmission antenna 33 and the fourth LF transmission antenna 34 disposed at the front portion. Each LF transmitting antenna 3 transmits a signal using LF band radio waves.

  FIG. 2 is a block diagram illustrating a configuration example of the in-vehicle device 1. The in-vehicle device 1 includes an in-vehicle control unit 11 that controls the operation of each component of the in-vehicle device 1. The in-vehicle control unit 11 is a microcomputer having, for example, one or a plurality of CPUs (Central Processing Units), a multi-core CPU, and the like. The in-vehicle controller 11 is provided with an in-vehicle receiver 12, an in-vehicle transmitter 13, a storage unit 14, and an output unit 15.

  The in-vehicle control unit 11 controls the operation of each component by executing a control program described later stored in the storage unit 14, identifies a change in the position of the portable device 2, and automatically sets the automatic sliding door D. Instruct to open.

  The storage unit 14 is a nonvolatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory. The storage unit 14 is a control for the vehicle-mounted control unit 11 to control the operation of each component of the vehicle-mounted device 1 to identify the position change of the portable device 2 and to instruct to automatically open the automatic sliding door D. I remember the program. Further, the storage unit 14 stores a predetermined position change of the portable device 2 with respect to the in-vehicle device 1. The predetermined position change corresponds to an operation condition for automatically opening the automatic sliding door D. In the first embodiment, an example in which the storage unit 14 stores the predetermined position change in advance will be described. However, the user may store an arbitrary predetermined position change in the storage unit 14. Details of the predetermined position change will be described later.

  The in-vehicle receiving unit 12 is connected to the RF receiving antenna 4, receives various response signals transmitted from the portable device 2 using UHF band radio waves, and outputs them to the in-vehicle control unit 11. Since the communicable region is wide in the UHF band, the arrangement of the RF receiving antenna 4 in the vehicle C is not particularly limited.

  The in-vehicle transmission unit 13 is connected to the plurality of LF transmission antennas 3, and transmits a signal for specifying the position change of the portable device 2 under the control of the in-vehicle control unit 11. For example, the in-vehicle transmission unit 13 transmits a process start signal for starting a process related to opening of the automatic sliding door D according to the control of the in-vehicle control unit 11. The in-vehicle transmission unit 13 transmits a position detection signal for detecting the position of the portable device 2 according to the control of the in-vehicle control unit 11. The strength of the signal transmitted from each LF transmission antenna 3 is set so that the portable device 2 can receive signals from two or more LF transmission antennas 3.

  A door ECU 6 is connected to the output unit 15, and the output unit 15 automatically opens the door opening instruction signal or the automatic sliding door D instructing to automatically open the automatic sliding door D according to the control of the in-vehicle control unit 11. A door closing instruction signal for instructing closing is output to the door ECU 6. The door ECU 6 drives the sliding door driving unit 61 according to the door opening instruction signal output from the output unit 15 of the in-vehicle device 1 to open the automatic sliding door D. Similarly, the door ECU 6 drives the sliding door driving unit 61 according to the door closing instruction signal output from the output unit 15 of the in-vehicle device 1 to close the automatic sliding door D. The automatic sliding door D includes a sliding door portion and a sliding mechanism that moves the sliding door portion in the opening direction or the closing direction, and the sliding door driving portion 61 is a power of a motor or the like that drives the sliding mechanism. Provide a source. The slide door drive unit 61 drives the slide mechanism by the motor to move the slide door unit in the door opening direction or the door closing direction.

A sliding door switch 5 is connected to the in-vehicle control unit 11, and a door signal corresponding to the operation state of the sliding door switch 5 is input to the in-vehicle control unit 11. The in-vehicle controller 11 can recognize the operation state of the slide door switch 5 based on the door signal of the slide door switch 5. When the slide door switch 5 is operated, the in-vehicle control unit 11 outputs a door opening instruction signal or a door closing instruction signal to the door ECU 6 at the output unit 15 to open or close the automatic sliding door D.
The on-vehicle controller 11 is connected to an open / close detection switch 7 for detecting the open / closed state of the automatic sliding door D. The opening / closing detection switch 7 inputs an opening / closing signal that is turned on / off in response to opening / closing of the automatic sliding door D to the in-vehicle controller 11. The in-vehicle controller 11 can recognize the open / closed state of the automatic sliding door D based on the input open / close signal.

  FIG. 3 is a block diagram illustrating a configuration example of the portable device 2. The portable device 2 includes a portable control unit 21 that controls the operation of each component of the portable device 2. The portable control unit 21 is a microcomputer having, for example, one or a plurality of CPUs, a multi-core CPU, and the like. The portable control unit 21 is provided with a portable reception unit 22, a portable transmission unit 23, a storage unit 24, and a received signal strength measurement unit 25.

  The portable control unit 21 reads out a control program, which will be described later, stored in the storage unit 24, controls the operation of each component, thereby controlling the operation of each component, and the position of the portable device 2 with respect to the in-vehicle device 1 The process which transmits the information required for specification of a change to the vehicle equipment 1 is performed.

  The storage unit 24 is a nonvolatile memory similar to the storage unit 14. The storage unit 24 performs a process of transmitting a response signal including information for specifying the position change of the portable device 2 to the in-vehicle device 1 by the portable control unit 21 controlling the operation of each component of the portable device 2. A control program for execution is stored.

  The portable receiving unit 22 is connected to the LF receiving antenna 22a, receives various signals such as a processing start signal and a position detection signal transmitted from the vehicle-mounted device 1 using radio waves in the LF band, and sends them to the portable control unit 21. Output. The LF receiving antenna 22a is, for example, a triaxial antenna, and a constant received signal strength can be obtained regardless of the orientation or posture of the portable device 2 with respect to the vehicle C.

  The reception signal strength measurement unit 25 detects the reception signal strength of each position detection signal transmitted from the plurality of LF transmission antennas 3 and received by the LF reception antenna 22 a, and outputs the detected reception signal strength to the portable control unit 21. Circuit.

  The portable transmission unit 23 is connected to the RF transmission antenna 23 a and transmits a signal corresponding to the signal transmitted from the portable device 2 according to the control of the portable control unit 21. Specifically, when the portable device 2 receives a process start signal for starting the process related to the opening of the automatic sliding door D, the portable transmitter 23 sends a predetermined reply signal according to the control of the portable controller 21. Send. In addition, when the portable device 2 receives the position detection signal, the portable transmission unit 23 uses the received signal strength measurement unit 25 as information for specifying the position change of the portable device 2 with respect to the in-vehicle device 1 according to the control of the portable control unit 21. Transmits a response signal including the measured received signal strength. The portable transmitter 23 transmits a response signal using UHF radio waves. The UHF band is an example of a radio wave band for transmitting signals, and is not necessarily limited to this.

  FIG. 4 is a conceptual diagram showing an example of a predetermined position change. The predetermined position change stored in the storage unit 14 is, for example, a position change P1 along an annular path. More specifically, the position change P1 is, for example, a rectangular or square path in the horizontal plane. Note that the rectangular and square paths are examples, and may be triangular or other polygonal paths, or may be curved closed paths. The route need not be a two-dimensional route on a horizontal plane, and may be a route on a vertical plane, a route on a plane intersecting the horizontal plane, or a non-planar three-dimensional path. It may be a closed path.

  FIG. 5 is a conceptual diagram showing another example of a predetermined position change. The predetermined position change stored in the storage unit 14 is, for example, a position change P2 along a path bent in the middle. More specifically, the position change P2 is a path having, for example, a first straight path in a horizontal plane and a second straight path bent from the straight path. The path of the position change P2 shown in FIG. 5 is an example, and a path that is bent at a plurality of locations may be used. Similarly to the position change P1, the position change P2 does not need to be a two-dimensional path on the horizontal plane, and may be a path on the vertical plane or a path on a plane intersecting the horizontal plane. A non-planar path may be used.

FIG. 6 is a flowchart showing a processing procedure related to detection of the portable device 2 for the door opening operation.
The in-vehicle control unit 11 causes the in-vehicle transmission unit 13 to transmit a processing start signal for starting processing related to opening of the automatic sliding door D from the LF transmission antenna 3 (step S1). The processing start signal is transmitted at a low cycle. For example, the in-vehicle device 1 transmits a processing start signal every few seconds. The portable device 2 is periodically activated to receive a signal transmitted from the in-vehicle device 1. When the portable device 2 exists within the reach of the process start signal and the process start signal is transmitted from the in-vehicle device 1 during the period when the portable device 2 is activated, the portable device 2 receives and receives the process start signal. A predetermined reply signal corresponding to the processed start signal is transmitted to the in-vehicle device 1 by the UHF band radio wave.

  Next, the in-vehicle controller 11 determines whether or not the in-vehicle receiver 12 has received a predetermined reply signal transmitted from the portable device 2 (step S2). When it determines with not receiving the predetermined reply signal (step S2: NO), the vehicle-mounted control part 11 returns a process to step S1.

  If it is determined that a predetermined reply signal has been received (step S2: YES), the in-vehicle controller 11 determines whether or not the automatic sliding door D is in a closed state based on the opening / closing signal from the opening / closing detection switch 7. (Step S3). When it determines with the automatic sliding door D being in an open state (step S3: NO), the vehicle-mounted control part 11 returns a process to step S1. When it determines with the automatic sliding door D being in a closed state (step S3: YES), the vehicle-mounted control part 11 switches the transmission period of the signal transmitted from LF transmission antenna 3 from a low period to a high period (step S4). For example, the vehicle-mounted control unit 11 switches from a low cycle of several seconds to a high cycle of several hundred milliseconds. By switching the transmission cycle of the signal transmitted from the LF transmission antenna 3 to a high cycle, it is possible to improve the accuracy of position change of the portable device 2 corresponding to the opening operation of the automatic sliding door D described later.

Subsequently, the vehicle-mounted control part 11 performs the door opening process of the automatic sliding door D (step S5). When the opening operation of the automatic sliding door D is detected due to a change in position of the portable device, the in-vehicle control unit 11 outputs a door opening instruction signal for instructing to automatically open the automatic sliding door D via the output unit 15. A process of outputting to the ECU 6 is executed.
And the vehicle-mounted control part 11 which finished the door opening process of the automatic sliding door D switches the transmission period of the signal transmitted from LF transmitting antenna 3 from a high period to a low period (step S6), and returns a process to step S1.

Next, details of the door opening process executed in step S5 will be described.
FIG. 7 is a flowchart showing a processing procedure related to the door opening process. The in-vehicle control unit 11 causes the in-vehicle transmission unit 13 to sequentially transmit the position detection signal from the first to fourth LF transmission antennas 31, 32, 33, and 34 (step S11). The strengths of the position detection signals transmitted from the first to fourth LF transmission antennas 31, 32, 33, and 34 are substantially the same. The in-vehicle transmission unit 13 transmits a position detection signal from the first LF transmission antenna 31 and then transmits a position detection signal having the same strength as the position detection signal from the second LF transmission antenna 32. Similarly, the in-vehicle transmission unit 13 transmits a position detection signal from the third LF transmission antenna 33, and then transmits a position detection signal from the fourth LF transmission antenna 34.

  The portable device 2 measures the reception signal strength of the position detection signals transmitted from the first to fourth LF transmission antennas 31, 32, 33, and 34 by the reception signal strength measurement unit 25, and obtains the reception obtained by the measurement. A response signal including the signal strength is transmitted to the vehicle-mounted device 1 by the portable transmission unit 23.

  The vehicle-mounted control unit 11 determines whether or not the vehicle-mounted receiving unit 12 has received a response signal from the portable device 2 with respect to the position detection signal within a predetermined period (step S12). When it is determined that the response signal has not been received (step S12: NO), the in-vehicle controller 11 determines whether or not the reception of the response signal for the transmission of the position detection signal has failed a predetermined number of times (step S13). . When it determines with having failed a predetermined number of times (step S13: YES), the vehicle-mounted control part 11 finishes a process. For example, when the portable device 2 has failed to receive the response signal a predetermined number of times or more because the mobile device 2 has left the vehicle C, the in-vehicle control unit 11 finishes the door opening process. If it is determined that the number of reception failures is less than the predetermined number (step S13: NO), the in-vehicle control unit 11 returns the process to step S11.

  When it determines with having received the response signal (step S12: YES), the vehicle-mounted control part 11 detects the position of the portable device 2 with respect to the vehicle C based on the received signal strength included in the response signal, and stores the detected position. (Step S14). Since the reception signal strength of the signal transmitted from each LF transmission antenna 3 corresponds to the distance between the portable device 2 and the corresponding LF transmission antenna 3, the received signal strength is used to transmit the portable device 2 and each LF transmission. The positional relationship with the antenna 3 can be specified, that is, the position of the portable device 2 can be detected. That is, the in-vehicle control unit 11 stores a history of position changes of the portable device 2 by the process of step S14. The distance between the first LF transmission antenna 31 and the portable device 2 can be estimated by the received signal strength of the position detection signal transmitted from the first LF transmission antenna 31. Similarly, the positional relationship between the second to fourth LF transmission antennas 34 and the portable device 2 is determined according to the received signal strength of each position detection signal transmitted from each of the second to fourth LF transmission antennas 32, 33, 34. Can be estimated. In the first embodiment, the received signal strength of the position detection signals from the four first to fourth LF transmitting antennas 31, 32, 33, and 34 is used to three-dimensionally position the portable device 2 with respect to the vehicle C. Can be detected.

  Next, the vehicle-mounted control unit 11 specifies a position change of the portable device 2 based on the stored history of the position of the portable device 2 (step S15). Since the position of the portable device 2 is detected by a position detection signal transmitted at a high cycle of several hundred milliseconds, the position or position change of the portable device 2 can be specified in detail. It should be noted that the position change of the portable device 2 in step S15 may be specified after the history of the position of the portable device 2 is accumulated to some extent.

  Next, the vehicle-mounted control unit 11 compares the position change specified in step S15 with the predetermined position change stored in the storage unit 14 (step S16), and determines whether the position change is identical or similar. Determination is made (step S17). When it determines with a position change not being in agreement or similar (step S17: NO), the vehicle-mounted control part 11 finishes a process. If it is determined that the position changes match or are similar (step S17: YES), the in-vehicle control unit 11 outputs a door opening instruction signal for instructing to automatically open the automatic sliding door D at the output unit 15 to the door ECU 6. (Step S18), and the process is terminated.

  According to the first embodiment, the position change of the portable device 2 with respect to the in-vehicle device 1 can be specified without providing the portable device 2 with an acceleration sensor, and automatic sliding is achieved by moving the portable device 2 along a predetermined path. The door D can be opened.

  Further, since the position detection signal transmitted from the plurality of LF transmitting antennas 3 is used to identify the position change of the portable device 2, the portable device 2 is moved two-dimensionally or three-dimensionally along a predetermined route. By doing so, the automatic sliding door D can be automatically opened.

  Further, the position change P1 stored in the storage unit 14 is an annular path, the position change P2 is a path bent in the middle, and these position changes P1 and P2 move the portable device 2 against the user's will. This is a route that is unlikely to be. Therefore, it is possible to effectively prevent the automatic sliding door D from being automatically opened against the user's will.

  Further, when the portable device 2 is detected around the vehicle, the in-vehicle transmission unit 13 switches the cycle of the signal transmitted from the LF transmission antenna 3 to a high cycle, and transmits the position detection signal at a high cycle. Therefore, the position change of the portable device 2 can be specified in more detail, and the automatic sliding door D can be effectively prevented from automatically opening against the user's will. can do.

(Modification 1)
In the first embodiment, the process of detecting the position of the portable device 2 on the in-vehicle device 1 side based on the received signal strength has been described. However, the portable device 2 detects its own position with respect to the in-vehicle device 1 and detects it. The response signal including the positional information obtained in this way may be configured to be transmitted to the in-vehicle device 1 by the portable transmission unit 23. The in-vehicle device 1 stores the position information included in the response signal transmitted from the portable device 2, and specifies the position change of the portable device 2 based on the stored position information.

  Also in the modified example 1, as in the first embodiment, the position change of the portable device 2 with respect to the in-vehicle device 1 can be specified without providing the acceleration sensor in the portable device 2, and the portable device 2 is moved by a predetermined route. The automatic sliding door D can be opened.

(Embodiment 2)
The vehicle communication system according to the second embodiment has a function of closing the automatic sliding door D by moving the portable device 2 along a predetermined route in addition to the same functions as those of the first embodiment. In the storage unit 14 according to the second embodiment, the vehicle-mounted control unit 11 controls the operation of each component of the vehicle-mounted device 1 to identify the position change of the portable device 2 and automatically open the automatic sliding door D. A control program for instructing and instructing automatic closing is stored. The storage unit 14 stores a predetermined position change for closing corresponding to an operation condition for automatically closing the automatic sliding door D, in addition to the predetermined position change for opening the door. Since the vehicular communication system according to the second embodiment differs from the first embodiment in the processing procedure of the in-vehicle control unit 11, the following mainly describes the differences. Since other configurations and operational effects are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 8 is a flowchart showing a processing procedure related to detection of the portable device 2 for the opening / closing operation. The in-vehicle control unit 11 causes the in-vehicle transmission unit 13 to transmit a processing start signal for starting processing related to opening of the automatic sliding door D from the LF transmission antenna 3 (step S201).

  Next, the in-vehicle control unit 11 determines whether the in-vehicle receiving unit 12 has received a predetermined reply signal transmitted from the portable device 2 (step S202). When it determines with not receiving the predetermined reply signal (step S202: NO), the vehicle-mounted control part 11 returns a process to step S201.

  When it determines with having received the predetermined reply signal (step S202: YES), the vehicle-mounted control part 11 switches the transmission period of the signal transmitted from LF transmission antenna 3 from a low period to a high period (step S203). And the vehicle-mounted control part 11 determines whether the automatic sliding door D is a closed state based on the opening / closing signal from the opening / closing detection switch 7 (step S204). If it is determined that the automatic sliding door D is in the closed state (step S204: YES), the in-vehicle control unit 11 executes an opening process for the automatic sliding door D (step S205). The contents of the door opening process are the same as in the first embodiment. When it is determined that the automatic sliding door D is in the open state (step S204: NO), the automatic sliding door D is closed (step S206). The in-vehicle control unit 11 sends a door closing instruction signal to the door ECU 6 via the output unit 15 to instruct to automatically close the automatic sliding door D when a closing operation of the automatic sliding door D is detected due to a change in the position of the portable device. Execute the output process.

  The vehicle-mounted control part 11 which finished the process of step S205 or step S206 switches the transmission period of the signal transmitted from LF transmitting antenna 3 from a high period to a low period (step S207), and returns a process to step S201.

Next, the door closing process executed in step S206 will be described.
FIG. 9 is a flowchart showing a processing procedure related to the door closing process. The vehicle-mounted control unit 11 executes the same processing as Steps S11 to 15 of Embodiment 1, Steps S211 to S215. That is, the in-vehicle control unit 11 transmits a position detection signal by the in-vehicle transmission unit 13, detects the position of the portable device 2 relative to the in-vehicle device 1 based on the response signal from the portable device 2, and determines the position of the portable device 2. A process for identifying the change is executed.

  Next, the vehicle-mounted control unit 11 compares the position change specified in step S215 with the predetermined position change for closing that is stored in the storage unit 14 (step S216), and whether the position change matches or is similar. It is determined whether or not (step S217). When it determines with a position change not being in agreement or similar (step S217: NO), the vehicle-mounted control part 11 complete | finishes a process. If it is determined that the position changes are the same or similar (step S217: YES), the in-vehicle control unit 11 outputs a door closing instruction signal for instructing automatic closing of the automatic sliding door D via the output unit 15 to the door ECU 6. (Step S218), and the process ends.

According to the second embodiment, the position change of the portable device 2 relative to the in-vehicle device 1 can be specified without providing the portable device 2 with an acceleration sensor, and automatic sliding is achieved by moving the portable device 2 along a predetermined path. The door D can be opened or closed.
Other functions and effects are the same as those of the first embodiment.

(Modification 2)
In the second embodiment, the process of detecting the position of the portable device 2 on the in-vehicle device 1 side based on the received signal strength has been described. However, the portable device 2 detects its own position with respect to the in-vehicle device 1 and detects it. The response signal including the positional information obtained in this way may be configured to be transmitted to the in-vehicle device 1 by the portable transmission unit 23. The in-vehicle device 1 stores the position information included in the response signal transmitted from the portable device 2, and specifies the position change of the portable device 2 based on the stored position information.

  Also in the modified example 1, as in the first embodiment, the position change of the portable device 2 with respect to the in-vehicle device 1 can be specified without providing the acceleration sensor in the portable device 2, and the portable device 2 is moved by a predetermined route. The automatic sliding door D can be opened or closed.

  In the second embodiment and the second modification, the example in which the automatic sliding door D is opened or closed by moving the portable device 2 has been described. However, only the function of closing the automatic sliding door D by moving the portable device 2 is described. You may comprise so that it may be provided.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 In-vehicle machine 2 Portable machine 3 LF transmission antenna 4 RF reception antenna 5 Slide door switch 6 Door ECU
DESCRIPTION OF SYMBOLS 7 Opening / closing detection switch 11 In-vehicle control part 12 In-vehicle receiving part 13 In-vehicle transmitting part 14 Storage part 15 Output part 21 Portable control part 22 Portable receiving part 22a LF receiving antenna 23 Portable transmitting part 23a RF transmitting antenna 24 Storage part 25 Received signal strength measurement Unit 31 First LF transmission antenna 32 Second LF transmission antenna 33 Third LF transmission antenna 34 Fourth LF transmission antenna 61 Slide door driving unit C Vehicle D Automatic sliding door

Claims (7)

An in-vehicle device having an in-vehicle transmission unit that transmits a position detection signal; and a portable device that receives the position detection signal and transmits a response signal corresponding to the received position detection signal. A vehicle communication system that outputs a door opening instruction signal for instructing automatic opening of a vehicle door or a door closing instruction signal for instructing automatic closing based on the response signal received from the portable device,
The in-vehicle device is
Based on the received response signal, a specifying unit that specifies a change in the position of the portable device with respect to the vehicle,
A storage unit for storing a predetermined position change of the portable device with respect to the vehicle;
A comparison unit for comparing the position change specified by the specifying unit and the predetermined position change stored in the storage unit;
A vehicle communication system comprising: an output unit that outputs the door opening instruction signal or the door closing instruction signal according to a comparison result by the comparison unit. The vehicle communication system according to claim 1, wherein the predetermined position change includes a position change along an annular route of the portable device. The vehicle communication system according to claim 1, wherein the predetermined position change includes a position change along a path bent in the middle of the portable device. The in-vehicle transmission unit intermittently transmits a processing start signal at a low cycle, and when the portable device receives the processing start signal, a predetermined signal is transmitted to the in-vehicle device,
The vehicle-mounted transmission unit according to any one of claims 1 to 3, wherein the vehicle-mounted transmission unit intermittently transmits the position detection signal at a high cycle when the vehicle-mounted device receives the predetermined signal. Communications system. The in-vehicle device is
The position detection signal is transmitted from a plurality of antennas provided in the vehicle,
The portable device is
A received signal strength measuring unit for measuring the received signal strength of each received position detection signal;
A portable transmitter that transmits the response signal including the received signal strength measured by the received signal strength measuring unit to the in-vehicle device;
The specific part is:
The position detection part which detects the position of the said portable apparatus with respect to the said vehicle equipment based on the said received signal strength contained in the said response signal is specified, The position change which this position detection part detected is specified. The vehicle communication system according to any one of 4. The in-vehicle device is
The position detection signal is transmitted from a plurality of antennas provided in the vehicle,
The portable device is
A received signal strength measuring unit for measuring the received signal strength of each received position detection signal;
Based on the received signal strength measured by the received signal strength measuring unit, a position detecting unit that detects the position of the portable device with respect to the in-vehicle device;
A portable transmitter that transmits the response signal including the position detected by the position detector to the in-vehicle device,
The specific part is:
The vehicle communication system according to any one of claims 1 to 5, wherein a position change included in the response signal is specified. When a position detection signal is transmitted and a response signal transmitted from the portable device is received in response to the position detection signal, the door opening is instructed to automatically open the vehicle door based on the received response signal. An in-vehicle device that outputs an instruction signal or a door closing instruction signal for instructing automatic closing,
Based on the received response signal, a specifying unit that specifies a change in the position of the portable device with respect to the vehicle,
A storage unit for storing a predetermined position change of the portable device with respect to the vehicle;
A comparison unit for comparing the position change specified by the specifying unit and the predetermined position change stored in the storage unit;
An in-vehicle device comprising: an output unit that outputs the door opening instruction signal or the door closing instruction signal according to a comparison result by the comparison unit.

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