JP2013040474A - Locking/unlocking control system, locking/unlocking control method, and electric wave transmitter/acceptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control locking/unlocking by preventing a malfunction of alternate repetition of unnecessary locking/unlocking, even when an electric wave transmitter/acceptor (portable machine) is stationary in the vicinity of a boundary of a communicable area.SOLUTION: An electric wave transmitter/acceptor 30A comprises an acceleration detection part 31A which detects acceleration imparted to itself. A control device 20A comprises a locking/unlocking control part 22A which controls locking/unlocking of an object CA. Either or both of the electric wave transmitter/acceptor 30A and the control device 20A comprises or comprise a distance measuring part 33A which measures a distance between the object CA and the electric wave transmitter/acceptor 30A. The locking/unlocking control part 22A controls the locking/unlocking of the object CA on the basis of information on the distance measured by the distance measuring part 33A and the acceleration detected by the acceleration detection part 31A.

Description

  The present invention relates to a control system, a control method, and a radio wave transmitting / receiving body for locking or unlocking a vehicle or the like, and in particular, a control system, a control method, and a radio wave for locking or unlocking using distance information and acceleration information. Concerning the handset.

  Conventionally, an entry system that automatically locks and unlocks a door of a vehicle or a house by wireless communication between a portable device that can be carried by a user and a control device provided in the vehicle or the house. Has been widely put into practical use. This is because the portable device having unique identification information is authenticated by the control device through wireless communication performed with the corresponding control device, and the control device locks and unlocks the door of the vehicle or house. Is realized.

  That is, when a user carrying a portable device approaches a vehicle, a house, or the like, the door enters a lockable state when wireless communication is established and the portable device is authenticated by entering a communicable area with the control device. Is automatically unlocked. On the other hand, when the user carrying the portable device leaves the vehicle or the house and leaves the communicable area with the control device, and the wireless communication is not established, the unlocked door is automatically locked. Is done.

  For example, in Patent Document 1, in a smart entry system for a vehicle, the following door lock control is performed for the purpose of realizing an easy-to-use and low-cost auto-lock function that automatically locks the door when the user leaves the vehicle. An apparatus is disclosed. That is, this door lock control device is configured to perform LF-UHF mutual communication between the portable device and the vehicle-mounted device, and includes an auto-lock distance switch that allows the user to designate the auto-lock distance as a long distance or a short distance. When the short distance is specified by this switch, the auto-lock function is executed based on the fact that the LF communication from the in-vehicle device to the portable device is not established, and when the long distance is specified, The auto-lock function is executed based on the fact that UHF communication from the portable device to the vehicle-mounted device is no longer established.

  Patent Document 2 discloses the following communication system for the purpose of preventing the communication device from unnecessarily authenticating the portable device. That is, in this communication system, when the portable device enters the communication area of the electronic control device and the portable device receives a response request signal transmitted from the electronic control device, the portable device responds as a response to the response request signal. Send a signal. In addition, the electronic control device may be configured to carry the portable device based on the response signal when the acceleration sensor of the portable device detects acceleration applied to the portable device during a predetermined period before the portable device receives the response request signal. Authenticate the machine. Therefore, this communication system is a communication system that authenticates a portable device when the portable device has moved during a predetermined period before receiving the response request signal.

  However, in the prior art disclosed in Patent Document 1, since the auto-lock function is executed based on the fact that wireless communication from the in-vehicle device or the like to the portable device is no longer established, the output from the in-vehicle device or the like due to the influence of the surrounding environment is performed. The actual communicable region between the vehicle equipped with the vehicle-mounted device or the like and the portable device varies depending on the variation in the received intensity of the received signal and the signal variation due to the output circuit of the vehicle-mounted device. As a result, when the user carrying the portable device stops near the boundary of the communicable area, the control device such as the in-vehicle device that controls the locking and unlocking alternately repeats the locking operation and the unlocking operation.

  Moreover, in the prior art disclosed in Patent Document 2, since the acceleration of the portable device is detected and whether or not a signal can be transmitted from the portable device to the vehicle-mounted device or the like, the user who carries the portable device stops. If this happens, the same problem occurs because the acceleration cannot be detected, and the user feels annoyed by unintentionally repeating the locking and unlocking operations.

JP 2003-269023 A JP 2010-24746 A

  Therefore, the object of the present invention is to prevent malfunctions that alternately repeat unnecessary locking and unlocking even when the portable device (radio wave transmitter / receiver) stays in the vicinity of the boundary of the communicable area. A control system, a control method, and a radio wave transmitter / receiver.

In order to solve the above problems, a control system comprising a radio wave transmitter and a control device that communicates with the radio wave transmitter and controls the locking and unlocking of a specific object, the radio wave transmitter and receiver Includes an acceleration detection unit that detects acceleration applied to itself, and a signal transmission unit that transmits a signal including information on the acceleration detected by the acceleration detection unit. A device receiving unit that receives a signal from the signal transmitting unit, and a locking / unlocking control unit that controls locking / unlocking of the object based on the signal received by the device receiving unit, the radio wave transmitter and the Either one or both of the control devices includes a distance measuring unit that measures the distance between the object and the radio wave transmitter / receiver, and the locking / unlocking control unit provides information on the distance and acceleration measured by the distance measuring unit. Control that controls the locking and unlocking of the object Stem is provided.
According to this, even when the radio wave transmitter / receiver stays in the vicinity of the boundary of the communicable region, it is possible to provide a control system that does not malfunction by repeating unnecessary locking and unlocking alternately.

Further, either or both of the radio wave transmitter and the control device are given to a predetermined distance threshold for the distance between the object and the radio wave transmitter and / or the radio wave handset. When a storage unit that stores a predetermined acceleration threshold value for acceleration is compared with the distance threshold value and the distance measured by the distance measurement unit, and the distance measured by the distance measurement unit is less than or equal to the distance threshold value The radio wave transmitter / receiver determines that the radio wave transmitter / receiver is within the predetermined area, and compares the acceleration threshold value with the acceleration detected by the acceleration detection unit, and the acceleration detected by the acceleration detection unit is equal to or greater than the acceleration threshold value. In this case, a movement determination unit that determines that the radio wave handset is moving, the area determination unit determines that the radio wave handset is within the predetermined area, and The movement determination unit If it is determined that the object is moving, the locking / unlocking control part unlocks the object, and the area determination part does not determine that the radio wave transmitter is within the predetermined area, and the movement When the determination unit determines that the radio wave handset is moving, the locking and unlocking control unit locks the object, and the movement determination unit does not determine that the radio wave handset is moving. The locking / unlocking control unit may maintain the locked state or unlocked state of the object.
According to this, malfunction of locking / unlocking can be surely prevented.

Further, the storage unit stores a predetermined locking distance threshold value and an unlocking distance threshold value as distance threshold values, and the area determination unit compares the locking distance threshold value with the distance measured by the distance measurement unit. When the distance measured by the distance measuring unit is equal to or greater than the locking distance threshold, the radio wave transmitter / receiver is determined to be within the locking region, and the unlocking distance threshold and the distance measuring unit are measured. If the distance measured by the distance measurement unit is equal to or less than the locking distance threshold, it is determined that the radio wave transmitter is within the unlocked area, and the area determination unit When it is determined that the receiver is within the unlocking area, and the movement determination unit determines that the radio wave receiver is moving, the unlocking control unit unlocks the object. , The area determination unit determines that the radio wave transmitter / receiver is within the lock area, and When the movement judgment unit determines that the radio wave transmission and reception body is moved, the locking and unlocking control unit locks the object may be characterized by.
According to this, the locking area and the unlocking area can be set separately, and the flexible predetermined area can be set, so that the malfunction of the locking and unlocking can be avoided.

Furthermore, the locking distance threshold value may be larger than the unlocking distance threshold value.
According to this, by creating a region that does not belong to either the locked region or the unlocked region, a region that maintains the locked state or the unlocked state can be formed even in the region.

Further, the object may be a vehicle, the control device may be an in-vehicle control device provided in the vehicle, and the radio wave transmitter / receiver may be a portable device that communicates with the in-vehicle control device.
According to this, malfunction of locking / unlocking can be prevented in the vehicle control system.

Furthermore, the in-vehicle control device further includes a device transmission unit that transmits a response request signal to the portable device, and the portable device further includes a signal reception unit that receives the response request signal transmitted by the device transmission unit, The distance measurement unit, the storage unit that stores the acceleration threshold value, and the movement determination unit are provided in the portable device, and the storage unit that stores the distance threshold value and the region determination unit are the vehicle-mounted control device. The distance measuring unit of the portable device measures the signal strength of the response request signal received by the signal receiving unit, and the signal transmitting unit of the portable device receives information on the measured signal strength. The device receiving unit of the in-vehicle control device receives the signal, and the region determining unit of the in-vehicle control device includes the signal strength information included in the received signal. Based on It may be characterized in that the portable device is determined to be in the predetermined area from the vehicle.
According to this, even in the so-called passive entry system, it is possible to provide a control system that does not cause a malfunction that alternately repeats unnecessary locking and unlocking even when the radio wave transmitter / receiver remains near the boundary of the communicable region.

According to another viewpoint, in order to solve the said subject, the control apparatus used for said control system is provided.
According to this, even when the radio wave transmitter / receiver stays near the boundary of the communicable region, it is possible to provide a control device in a control system that does not malfunction by repeating unnecessary locking and unlocking alternately.

According to another aspect, in order to solve the above problems, there are a control device that controls locking / unlocking of a specific object and a radio wave transmitter / receiver that performs wireless communication to control locking / unlocking of the object. The radio transmitter / receiver includes an acceleration detection unit that detects an acceleration given to itself, a distance measurement unit that measures a distance from the target object, information on acceleration detected by the acceleration detection unit, and measurement of the distance. A signal for transmitting a signal including the control signal generated by the locking / unlocking signal generating unit and a locking / unlocking signal generating unit that generates a control signal for controlling the locking / unlocking of the object based on the distance information measured by the unit A radio wave transmitter / receiver that causes the locking / unlocking execution unit of the control device to lock / unlock the object based on the control signal generated by the locking / unlocking signal generation unit.
According to this, even when the radio wave transmitter / receiver stays in the vicinity of the boundary of the communicable region, it is possible to provide a radio wave transmitter / receiver that does not malfunction by repeating unnecessary locking and unlocking alternately.

According to another aspect, in order to solve the above-mentioned problem, a radio wave transmitter and a control device communicate with each other via wireless communication means to control locking / unlocking of a specific object, The distance between the object and its radio wave transmitter / receiver is measured, and the radio wave transmitter / receiver detects the acceleration given to itself and transmits information on the acceleration to the control device. The acceleration information is received, and based on the received acceleration information, it is determined that the radio wave transmitter is moving when the acceleration is equal to or greater than a predetermined acceleration threshold, and the measured distance is On the basis of the distance being equal to or less than a predetermined distance threshold, the radio wave handset is determined to be in the predetermined area, the radio wave handset is determined to be in the predetermined area, and If it is determined that the radio handset is moving, If the object is unlocked, the radio handset is not determined to be within the predetermined area, and the radio handset is determined to be moving, the object is locked and the If it is not determined that the radio wave handset is moving, a control method is provided that maintains the locked or unlocked state of the object.
According to this, even when the radio wave transmitter / receiver stays in the vicinity of the boundary of the communicable region, it is possible to provide a control method that does not cause a malfunction that alternately repeats unnecessary locking / unlocking.

  As described above, according to the present invention, even when the radio wave transmission / reception body stays near the boundary of the communicable area, it prevents the erroneous operation of alternately repeating unnecessary locking / unlocking and controls the locking / unlocking. A control system, a control method, and a radio wave transmitter / receiver can be provided.

1 is a block diagram of a first embodiment according to the present invention. The block diagram of the 2nd Example which concerns on this invention. The flowchart (the 1) of 2nd Example which concerns on this invention. The flowchart (the 2) of 2nd Example which concerns on this invention. The block diagram of the 3rd Example concerning the present invention. The flowchart of the 3rd Example concerning the present invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
<First Example>
FIG. 1 is a block diagram showing a control system 1 in the first embodiment according to the present invention. The control system 1 is provided in a portable device 30 (also called FOB) that is a radio wave transmitter / receiver and a vehicle C that is a specific object, and communicates with the portable device 30 to control locking / unlocking of the vehicle C. And an in-vehicle control device 20. The specific object is not limited to a vehicle, and includes a moving body such as a vehicle and a facility such as a warehouse that are to be locked and unlocked.

  The in-vehicle control device 20 is provided to control various devices provided in the vehicle C, and is a control device that controls the door lock device E in the present embodiment. The in-vehicle control device may be in the same position as the object to be locked / unlocked, or may be in a different position. Therefore, in the present embodiment, since the vehicle-mounted control device 20 is provided in the vehicle C, it is in the same position as the object. However, the present invention is not limited to this, and the vehicle-mounted control device is not provided in the vehicle C. For example, it may be on cloud computing.

  The portable device 30 is held by a user of the vehicle C in order to operate the vehicle C. In the present embodiment, the portable device 30 is a portable device that can lock and unlock the door. The portable device 30 includes an acceleration detection unit 31 that detects acceleration applied to the portable device 30, a distance measurement unit 33 that measures the distance between the vehicle C and the portable device 30, acceleration information detected by the acceleration detection unit 31, and a distance measurement unit. And a signal transmission unit 32 that transmits a signal including information on the distance measured by 33 to the in-vehicle control device 20. The portable device 30 further includes a CPU that controls these components of the portable device 30.

  The acceleration detection unit 31 is an acceleration sensor that detects the acceleration given to the portable device 30 itself, and may be any method such as a mechanical type, an optical type, and a semiconductor type as long as it can measure the acceleration. It is not limited. Preferably, it is a one-chip semiconductor acceleration sensor capable of detecting multiple axes using MEMS (Micro Electro Mechanical Systems) technology.

  The signal transmission unit 32 transmits a signal including information on the acceleration detected by the acceleration detection unit 31 to the in-vehicle control device 20. Specifically, when the user of the portable device 30 operates the portable device 30 to lock or unlock the door lock device E of the vehicle C, the portable device 30 locks and unlocks the in-vehicle control device 20. The acceleration information is transmitted together with the control signal. The band to be used is generally an RF band from the portable device 30 to the in-vehicle control device 20, but is not limited thereto. The acceleration information may be the acceleration value itself detected by the acceleration detection unit 31 or may be a result of processing the acceleration value. Specifically, as the acceleration information, an average value, a maximum value, a median value, and the like of values measured at a predetermined time from when the user operates the portable device 30 are calculated by the acceleration detection unit 31, and appropriately. Selected.

  The distance measuring unit 33 measures the distance between the vehicle C and the portable device 30. The method for measuring the distance is not particularly limited. For example, the portable device 30 may further include a distance sensor and measure the distance to the vehicle C. In this case, it is preferable that the portable device 30 transmits the measured distance to the vehicle C together with acceleration information and the like from the signal transmission unit 32. The distance measuring unit 33 may be provided on the vehicle C, or may be provided on both the portable device 30 and the vehicle C. For example, in the former, the vehicle C may measure the distance between the two by measuring the intensity of the radio signal from the portable device 30. In the latter case, the portable device 30 and the vehicle C may further include a GPS sensor (Global Positioning System), and the distance between the two may be calculated from the difference in position between the two.

  The in-vehicle control device 20 includes a device receiving unit 21 that receives a signal from the signal transmission unit 32 of the portable device 30, a locking / unlocking control unit 22 that controls locking / unlocking of the vehicle C based on the signal received by the device receiving unit 21, The storage unit 23 for storing a predetermined acceleration threshold for the acceleration given to the portable device 30 and a predetermined distance threshold for the distance between the vehicle C and the portable device 30, and the portable device 30 are in a predetermined area. An area determination unit 24 that determines whether or not the mobile device 30 is moving, and a movement determination unit 35 that determines whether or not the portable device 30 is moving. The in-vehicle control device 20 further includes a CPU that controls these components of the in-vehicle control device 20.

  The device reception unit 21 receives and decodes the signal from the signal transmission unit 32 of the portable device 30 with the antenna.

  The storage unit 23 is typically composed of a memory, and stores a predetermined distance threshold for the distance between the vehicle C and the portable device 30. The distance threshold is appropriately determined as a threshold for determining how far the user holding the portable device 30 is from the vehicle C to lock or unlock the door of the vehicle C. If the threshold is too small, the user does not unlock the door even though the user is approaching the vehicle C. Conversely, if the threshold is too large, the user is moving away from the vehicle C, but the user is not locked. Therefore, an appropriate threshold value is appropriately set and stored when the vehicle C is shipped or maintained.

  The storage unit 23 further stores a predetermined acceleration threshold value for acceleration given to the portable device 30. The acceleration threshold value is appropriately determined as a threshold value for determining whether or not the user of the portable device 30 is moving while holding the portable device 30. If the threshold value is too small, it is not moving, but conversely, if the threshold value is too large, it is erroneously determined that it is moving but not moved. At the time of maintenance, an appropriate threshold value is set and stored so that it can be estimated that the user is clearly moving.

Here, the determination of whether or not the user is moving while holding will be described more specifically.
There are various ways of holding the portable device 30 of the user. For example, holding the portable device 30 in a hand, holding the portable device 30 in a pocket, holding the portable device 30 in a bag, and the like. In addition, the user holding the portable device 30 moves in various ways. For example, stopping for walking, running, refueling, etc., light work, light exercise such as bending and stretching. In the above example, “walking” and “running” correspond to the movement, and the acceleration in the walking state and the acceleration in the running state are stopped on the spot, and light work is performed. The acceleration in the horizontal direction is often large compared to the acceleration in the state and the state of light exercise. Therefore, for example, if a three-axis acceleration sensor is used, it can be determined whether the user is moving up and down (bending and stretching) or walking on the spot. Can be done. In this way, it is possible to prevent a malfunction that the locking / unlocking operation that the user expects from the vehicle differs from the actual locking / unlocking operation of the vehicle in accordance with the user's action.

  The movement determination unit 35 compares the acceleration threshold value stored in the storage unit 23 with the acceleration detected by the acceleration detection unit 31 of the portable device 30 and compares the acceleration obtained through the device reception unit 21, and the acceleration detected by the acceleration detection unit 31 is detected. If the acceleration threshold is not less than the acceleration threshold, it is determined that the portable device 30 is moving. Conversely, the movement determination unit 35 compares the acceleration threshold with the detected acceleration, and determines that the portable device 30 is not moving when the detected acceleration is less than the acceleration threshold.

  The area determination unit 24 compares the distance threshold value stored in the storage unit 23 with the distance measurement unit 33 of the portable device 30 and compares the distance obtained through the device reception unit 21, and the distance measurement unit 33 measures the distance. When the distance is equal to or less than the distance threshold, it is determined that the portable device 30 is in the predetermined area. Conversely, the area determination unit 24 compares the distance threshold with the measured distance, and determines that the portable device 30 is outside the predetermined area when the measured distance exceeds the distance threshold. The area determination unit 24 is provided in the in-vehicle control device 20 in the present embodiment, but is not limited thereto, and may be provided in the portable device 30. Preferably, the storage unit 23 that stores the distance threshold is provided. It may be provided on the equipment provided.

  The locking / unlocking control unit 22 controls the locking / unlocking of the vehicle C based on the distance measured by the distance measuring unit 33 of the portable device 30 and the acceleration information detected by the acceleration detecting unit 31. More specifically, the locking / unlocking control unit 22 determines that the region determination unit 24 determines that the portable device 30 is within a predetermined region, and the movement determination unit 35 determines that the portable device 30 is moving. In the case, the vehicle C is unlocked. In addition, when the area determination unit 24 does not determine that the portable device 30 is in the predetermined region and the movement determination unit 35 determines that the portable device 30 is moving, the locking / unlocking control unit 22 Lock C. Further, when the movement determination unit 35 does not determine that the portable device 30 is moving, the locking / unlocking control unit 22 maintains the locked state or the unlocked state of the vehicle C. According to this, even when the portable device 30 stays in the vicinity of the boundary of the communicable region, it is possible to reliably prevent malfunctions in which unnecessary locking / unlocking is alternately repeated.

  From another viewpoint, this is a control method in which the portable device 30 and the vehicle-mounted control device 20 communicate via wireless communication means to control locking / unlocking of the vehicle C that is a specific object. Specifically, this control method is as follows. The portable device 30 measures the distance between the vehicle C and the portable device 30, detects the acceleration given to itself, and transmits information on the acceleration and the distance to the in-vehicle control device 20. Then, the in-vehicle control device 20A receives the transmitted acceleration and distance information, and based on the received acceleration information, the mobile device 30 is moving because the acceleration is equal to or greater than a predetermined acceleration threshold value. Based on the received distance information, it is determined that the portable device 30 is in the predetermined area when the distance is equal to or less than a predetermined distance threshold. When it is determined that the portable device 30 is within the predetermined area and it is determined that the portable device 30 is moving, the vehicle C is unlocked. If it is not determined that the portable device 30 is within the predetermined area and it is determined that the portable device 30 is moving, the object is locked, and if the portable device 30 is not determined to be moving, The locked state or unlocked state of the vehicle C is maintained.

  Further, the storage unit 23 has two distance threshold values, a predetermined locking distance threshold value and an unlocking distance threshold value, as to the distance threshold value. The measured distance may be compared, and if the distance measured by the distance measuring unit 33 is equal to or greater than the locking distance threshold, it may be determined that the portable device 30 is in the locking area. The area determination unit 24 compares the unlocking distance threshold with the distance measured by the distance measuring unit 33. If the distance measured by the distance measuring unit 33 is equal to or less than the locking distance threshold, the portable device 30 unlocks the device. You may determine with existing in a field.

  When the area determination unit 24 determines that the portable device 30 is in the unlocking region and the movement determination unit 35 determines that the portable device 30 is moving, the locking / unlocking control unit 22 C, that is, the door lock device E may be unlocked. When the area determination unit 24 determines that the portable device 30 is in the locked region and the movement determination unit 35 determines that the portable device 30 is moving, the lock / unlock control unit 22 Device E may be locked. By doing so, the locking area and the unlocking area can be set separately, and the flexible predetermined area can be set, thereby avoiding the malfunction of the locking and unlocking.

  Further, the locking distance threshold value may be larger than the unlocking distance threshold value. In this way, by creating a region that does not belong to either the locked region or the unlocked region, a region that maintains the locked state or the unlocked state can be formed even in the region, and malfunctions can be further prevented.

<Second Example>
FIG. 2 is a block diagram showing a control system 1A in the second embodiment according to the present invention. In the following description, differences from the first embodiment will be mainly described.
The in-vehicle controller 20A of the control system 1A includes an apparatus transmitter 25A that transmits a response request signal to the portable device 30A, an apparatus receiver 21A that receives a signal from the signal transmitter 32A of the portable device 30A, and an apparatus receiver 21A. The locking / unlocking control unit 22A that controls locking / unlocking of the vehicle CA based on the received signal, the storage unit 23A that stores a predetermined distance threshold for the distance between the vehicle CA and the portable device 30A, and the portable device 30A are predetermined. An area determination unit 24A that determines whether or not the area is present.

  The portable device 30A of the control system 1A includes a signal receiving unit 36A that receives a response request signal transmitted by the device transmitting unit 25A of the in-vehicle control device 20A, an acceleration detecting unit 31A that detects acceleration given to itself, and an acceleration detecting unit A signal transmission unit 32A that transmits a signal including acceleration information detected by 31A to the in-vehicle control device 20A, a distance measurement unit 33A that measures the distance between the vehicle CA and the portable device 30A, and an acceleration given to the portable device 30A A storage unit 34A that stores a predetermined acceleration threshold value and a movement determination unit 35A that determines whether or not the portable device 30A is moving are provided.

  Thus, the control system 1A constitutes a so-called passive entry system, and the vehicle-mounted control device 20A obtains information from the portable device 30A even when the user who owns the portable device 30A does not operate the portable device 30A. Can do.

  The device transmission unit 25A transmits a response request signal to the portable device 30A periodically at a predetermined interval with a predetermined signal strength. The signal receiving unit 36A receives the response request signal. The portable device 30A that has received the response request signal by the signal receiving unit 36A transmits the response signal from the signal transmission unit 32A to the in-vehicle control device 20A regardless of whether the user has operated the portable device 30A. The response signal includes information on the acceleration detected by the acceleration detection unit 31A and information on the distance between the vehicle CA and the portable device 30A measured by the distance measurement unit 33A.

  The movement determination unit 35A compares the acceleration threshold value stored in the storage unit 34A with the acceleration detection unit 31A of the portable device 30 and the acceleration obtained through the device reception unit 21A, and the acceleration detected by the acceleration detection unit 31A is detected. When the acceleration threshold value is greater than or equal to the acceleration threshold, it is determined that the portable device 30A is moving. Conversely, the movement determination unit 35A compares the acceleration threshold with the detected acceleration, and determines that the portable device 30A is not moving when the detected acceleration is less than the acceleration threshold. This determination result is transmitted to the in-vehicle control device 20A by the signal transmission unit 32A as acceleration information.

  In the present embodiment, since the acceleration information can reduce the amount of information to be transmitted, the signal transmission unit 32A transmits information indicating the result of determination by the movement determination unit 35A. However, the present invention is not limited to this, and both the portable device 30A and the vehicle-mounted control device 20A may include the movement determination unit 35A and share the processing, or even the acceleration value itself detected by the acceleration detection unit 31A. Alternatively, the acceleration value may be processed. The acceleration is a value measured by the acceleration detection unit 31A at a predetermined time from when the signal reception unit 36A receives the response request signal or immediately after reception until the response signal is transmitted. As the acceleration value measured at the predetermined time, an average value, a maximum value, a median value, and the like are calculated and appropriately selected.

  Information on the distance between the vehicle CA and the portable device 30A measured by the distance measuring unit 33A is obtained from the signal strength of the response request signal received by the signal receiving unit 36A. Specifically, the distance measuring unit 33A measures the signal strength (RSSI: Receive Signal Strength Indication) received by the signal receiving unit 36A of the response request signal transmitted by the device transmitting unit 25A with a predetermined signal strength.

  The signal transmission unit 32A of the portable device 30A transmits a response signal including acceleration information and distance information (signal strength) as a determination result to the in-vehicle control device 20A. The device receiver 21A of the in-vehicle controller 20A receives the response signal. The area determination unit 24A of the in-vehicle control device 20A has a predetermined distance regarding the distance information (signal strength) information included in the received response signal and the distance between the vehicle CA and the portable device 30A stored in the storage unit 23A. Based on the threshold value (RSSI value), it is determined whether or not the portable device 30A is within a predetermined area from the vehicle CA.

  FIG. 3 shows a flowchart of a control system 1A that performs locking and unlocking based on movement determination and area determination in the present embodiment. In the flowchart, “S” indicates a step of each process. In S100, the in-vehicle controller (ECU) periodically transmits response request signals at predetermined intervals. The FOB present at the position for receiving the response request signal receives the response request signal in S102, and measures the reception process, that is, the RSSI value in S104. Further, the FOB measures the acceleration during or after receiving the response request signal from the ECU in S106. Specifically, the FOB (acceleration detection unit 31A) measures the acceleration received by itself during reception of the response request signal, or the acceleration received by itself within a few milliseconds after reception, and receives the response during that time. The average value of acceleration is calculated.

  The FOB is determined in S108 by comparing the acceleration measured in S106 with a predetermined acceleration threshold value stored in the storage unit 34A. The FOB sets a flag (bit) indicating that the FOB is moving to 1 when the measured acceleration is equal to or greater than the acceleration threshold value in S110, that is, when it is determined that the FOB is moving. If the measured acceleration is less than the acceleration threshold value in S112, that is, if it is determined that the FOB has not moved, the FOB sets a flag (bit) indicating that the FOB has not moved to 0. In S114, the FOB transmits a response signal to the ECU in order to reply to the response request signal received in S102. This response signal includes a measured RSSI value and a flag indicating the movement state of the FOB.

  In S116, the ECU receives a response signal from the FOB. In S118, the ECU detects the current locked / unlocked state (locked / unlocked state) of the door. In the unlocked state, in S120, the ECU compares the RSSI value included in the FOB response signal with the distance threshold (lock threshold) to be locked stored in the storage unit 23A, and the RSSI value is If it is equal to or smaller than the lock threshold value, then in S122, if the flag included in the FOB response signal indicates that the FOB is moving, the door is locked (locked) in S124.

  The ECU compares the RSSI value included in the FOB response signal with the lock threshold at S120, and if the RSSI value exceeds the lock threshold, or the flag moves the FOB at S122. If not, in S126, the door state is maintained, that is, the unlocked state (unlocked state) is maintained. Note that either of the determinations in S120 and S122 may be performed first.

  The ECU detects the current locked / unlocked state of the door in S118, and if it is in the locked state, in S128, the ECU includes the RSSI value included in the FOB response signal and the unlocked value stored in the storage unit 23A. The distance threshold to be locked (unlock threshold) is compared. If the RSSI value is greater than or equal to the unlock threshold, the ECU further unlocks the door in S132 if the flag included in the FOB response signal indicates that the FOB is moving in S130. (Unlock).

  The ECU compares the RSSI value included in the FOB response signal with the unlock threshold at S128, and if the RSSI value is less than the unlock threshold, or the flag is FOB at S130. When it shows that it has not moved, in S134, the state of the door is maintained, that is, the locked state (locked state) is maintained. It should be noted that either S128 or S130 may be determined first. According to this, even in the so-called passive entry system, even when the portable device 30A stays near the boundary of the communicable region, it is possible to provide the control system 1A that does not malfunction by repeating unnecessary locking and unlocking alternately.

  In this flowchart, the lock threshold (locking distance threshold) may be the same value as the unlock threshold (unlocking distance threshold), or the lock threshold may be larger than the unlock threshold. In addition, 0/1 of the flag indicating the movement of the FOB may be an opposite value. In the inequality sign of comparison between the RSSI value and the threshold, ≧ may be> or ≦ may be <.

  FIG. 4 is a flowchart illustrating a process when the response signal from the FOB cannot be received by the ECU according to this embodiment. In S200, the ECU transmits a response request signal as in S100. Thereafter, the ECU starts a timer in S202. In S204, the ECU checks whether or not a response signal from the FOB has been received. When the ECU receives a response signal from the FOB, the ECU performs a response signal reception process (process after S116) in S206. If the ECU has not received a response signal from the FOB, the ECU checks in S208 whether or not the timer started in S202 has passed a predetermined time. If the predetermined time has not elapsed, the ECU repeats the check in S204. If the predetermined time has elapsed, the ECU ends without doing anything in S210, that is, the state at that time (locked state / unlocked state). To maintain. Thus, when the portable device 30A is in a position where it cannot receive the response request signal, the ECU does not continue to wait for a response signal from the portable device 30A for one response request signal.

<Third embodiment>
FIG. 5 is a block diagram showing a control system 1B in the third embodiment according to the present invention. In the following description, differences from the above embodiment will be mainly described. In this embodiment, the in-vehicle control device 20B of the control system 1B includes a device transmission unit 25B that transmits a response request signal to the portable device 30B, a device reception unit 21B that receives a signal from the signal transmission unit 32B of the portable device 30B, Device receiving unit 21B About locking / unlocking control unit 22B that controls locking / unlocking of vehicle CB based on the received signal, a predetermined distance threshold for the distance between vehicle CB and portable device 30B, and acceleration applied to portable device 30B A storage unit 23B that stores a predetermined acceleration threshold value, a distance measurement unit 33B that measures the distance between the vehicle CB and the portable device 30B, a movement determination unit 35B that determines whether the portable device 30B is moving, The portable device 30B includes an area determination unit 24B that determines whether or not the mobile apparatus 30B is in a predetermined area.

  The portable device 30B of the control system 1B includes a signal receiving unit 36B that receives a response request signal transmitted by the device transmitting unit 25B of the in-vehicle control device 20B, an acceleration detecting unit 31B that detects an acceleration given to itself, and an acceleration detecting unit A signal transmission unit 32B configured to transmit a signal including acceleration information detected by 31B to the vehicle-mounted control device 20B.

  Thereby, the control system 1B constitutes a so-called passive entry system, and even when the user who owns the portable device 30B having the minimum necessary functions in the portable device does not operate the portable device 30B, the in-vehicle control device 20B Can obtain information from the portable device 30B.

  The device transmitter 25B transmits a response request signal to the portable device 30B with a predetermined signal strength. The portable device 30B that has received the response request signal by the signal receiving unit 36B transmits the response signal from the signal transmission unit 32B to the in-vehicle control device 20A regardless of whether the user has operated the portable device 30B. The response signal includes information on the acceleration detected by the acceleration detector 31A. In this embodiment, since the distance measuring unit is provided on the vehicle-mounted control device side, the response signal does not include information on the distance between the vehicle CB and the portable device 30B.

  The acceleration information may be the acceleration value itself detected by the acceleration detection unit 31B, or may be a processed acceleration value. The acceleration is a value measured by the acceleration detection unit 31B at a predetermined time from when the signal reception unit 36B receives the response request signal or immediately after reception until the response signal is transmitted. As the acceleration value measured at the predetermined time, an average value, a maximum value, a median value, and the like are calculated and appropriately selected.

  The distance measuring unit 33B of the in-vehicle controller 20B measures the distance between the vehicle CB and the portable device 30B based on the signal strength of the response signal received by the device receiving unit 21B from the portable device 30B. Specifically, the distance measurement unit 33B measures the signal strength (RSSI value) received by the device reception unit 21B of the response signal transmitted by the signal transmission unit 32B with a predetermined signal strength.

  The area determination unit 24B of the in-vehicle control device 20B has a predetermined distance threshold (the signal intensity (RSSI value) measured by the distance measurement unit 33B and the distance between the vehicle CB and the portable device 30B stored in the storage unit 23B ( Based on the RSSI value), it is determined whether or not the portable device 30B is within a predetermined area from the vehicle CB.

  The movement determination unit 35B compares the acceleration threshold value stored in the storage unit 23B with the acceleration information included in the response signal from the portable device 30B. If the acceleration included in the response signal is equal to or greater than the acceleration threshold value, the movement determination unit 35B It is determined that the machine 30B is moving. Conversely, the movement determination unit 35B compares the acceleration threshold value with the acceleration included in the response signal, and determines that the portable device 30B is not moving when the acceleration included in the response signal is less than the acceleration threshold value.

  FIG. 6 shows a flowchart of the control system 1B that performs locking and unlocking based on movement determination and area determination when the vehicle is unlocked in this embodiment. In S300, the in-vehicle controller (ECU) periodically transmits response request signals at predetermined intervals. The FOB present at the position for receiving the response request signal receives the response request signal in S302. In S304, the FOB measures the acceleration during or after receiving the response request signal from the ECU.

  In S306, the FOB transmits a response signal including the measured RSSI value to the ECU in order to reply to the response request signal received in S302. In S308, the ECU receives the response signal from the FOB and measures the RSSI value.

  In S310, the ECU compares the RSSI value of the FOB response signal with the distance threshold (lock threshold) to be locked stored in the storage unit 23B, and if the RSSI value is equal to or less than the lock threshold, further in S312 If it is determined that the FOB is moving based on the acceleration information included in the FOB response signal, the door is locked (locked) in S314.

  In S310, the ECU compares the RSSI value of the FOB response signal with the lock threshold value. If the RSSI value exceeds the lock threshold value, or in S312, the FOB is moved based on the acceleration information. If it is determined that there is no, the door state is maintained, that is, the unlocked state (unlocked state) is maintained in S316. It should be noted that either S310 or S312 may be determined first.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible.

DESCRIPTION OF SYMBOLS 1 Control system 20 Vehicle-mounted control apparatus 30 Portable machine 21 Apparatus receiving part 22 Locking / unlocking control part 23 Storage part 24 Area | region determination part 25 Apparatus transmission part 31 Acceleration detection part 32 Signal transmission part 33 Distance measurement part 34 Storage part 35 Movement determination part 36 Signal receiver C Vehicle (object)

Claims (9)

A control system comprising a radio wave transmitter and a control device that communicates with the radio wave handset and controls locking and unlocking of a specific object,
The radio wave handset is
An acceleration detection unit for detecting the acceleration given to itself;
A signal transmission unit for transmitting a signal including information on acceleration detected by the acceleration detection unit;
With
The controller is
A device receiver for receiving a signal from the signal transmitter of the radio wave transceiver;
Based on the signal received by the device receiving unit, a locking / unlocking control unit that controls locking / unlocking of the object;
With
Either one or both of the radio wave transmitter and the control device includes a distance measuring unit that measures the distance between the object and the radio wave transmitter,
The said locking / unlocking control part is a control system which controls locking / unlocking of the said object based on the information of the distance and the said acceleration which the said distance measurement part measured. One or both of the radio wave transmitter and the control device are
A storage unit for storing a predetermined distance threshold value for a distance between the object and the radio wave transmitter and / or a predetermined acceleration threshold value for an acceleration given to the radio wave handset;
The distance threshold is compared with the distance measured by the distance measuring unit, and when the distance measured by the distance measuring unit is equal to or less than the distance threshold, it is determined that the radio wave transmitter / receiver is within a predetermined area. An area determination unit;
A movement determination that compares the acceleration threshold with the acceleration detected by the acceleration detector, and determines that the radio wave transmitter is moving when the acceleration detected by the acceleration detector is equal to or greater than the acceleration threshold. And
With
When the area determination unit determines that the radio wave transmitter / receiver is within the predetermined area, and the movement determination unit determines that the radio wave transmitter / receiver is moving, the locking / unlocking control unit is Unlocking the object,
When the area determination unit does not determine that the radio wave transmitter / receiver is within the predetermined area, and the movement determination unit determines that the radio wave transmitter / receiver is moving, the locking / unlocking control unit Locks the object,
When the movement determination unit does not determine that the radio wave transmitter is moving, the locking / unlocking control unit maintains the locked state or the unlocked state of the object.
The control system according to claim 1. The storage unit stores a predetermined locking distance threshold and an unlocking distance threshold as the distance threshold,
The area determination unit
The locking distance threshold is compared with the distance measured by the distance measuring unit, and when the distance measured by the distance measuring unit is equal to or greater than the locking distance threshold, the radio wave transmitter / receiver is within the locking region. Judgment,
The unlocking distance threshold is compared with the distance measured by the distance measuring unit, and when the distance measured by the distance measuring unit is equal to or less than the locking distance threshold, the radio wave transmitter / receiver is in the unlocking region. And
When the area determination unit determines that the radio wave transmitter / receiver is within the unlocking area, and the movement determination unit determines that the radio wave transmitter / receiver is moving, the locking / unlocking control unit Unlocks the object,
When the area determination unit determines that the radio wave transmitting / receiving body is within the locking area, and the movement determination unit determines that the radio wave transmitting / receiving body is moving, the locking / unlocking control unit is Locking the object;
The control system according to claim 2.   The control system according to claim 3, wherein the locking distance threshold is larger than the unlocking distance threshold.   The object is a vehicle, the control device is a vehicle-mounted control device provided in the vehicle, and the radio wave transmitter / receiver is a portable device that communicates with the vehicle-mounted control device. 4. The control system according to any one of 4. The in-vehicle control device further includes a device transmission unit that transmits a response request signal to the portable device,
The portable device further includes a signal reception unit that receives a response request signal transmitted by the device transmission unit,
The distance measurement unit, the storage unit that stores the acceleration threshold, and the movement determination unit are provided in the portable device,
The storage unit that stores the distance threshold and the region determination unit are provided in the in-vehicle control device,
The distance measuring unit of the portable device measures the signal strength of the response request signal received by the signal receiving unit,
The signal transmission unit of the portable device transmits the signal further including information of the measured signal strength,
The device receiver of the in-vehicle control device receives the signal,
The area determination unit of the in-vehicle control device determines that the portable device is within the predetermined area from the vehicle based on information on the signal strength included in the received signal. 5. The control system according to 5.   The control apparatus used for the control system of Claims 1 thru | or 6. A control device that controls locking / unlocking of a specific object, and a radio wave transmitter / receiver that performs wireless communication to control locking / unlocking of the object,
The radio wave handset is
An acceleration detection unit for detecting the acceleration given to itself;
A distance measuring unit for measuring the distance to the object;
A locking / unlocking signal generating unit for generating a control signal for controlling locking / unlocking of the object based on information on acceleration detected by the acceleration detecting unit and information on distance measured by the distance measuring unit;
A signal transmission unit for transmitting a signal including the control signal generated by the locking / unlocking signal generation unit;
With
A radio wave transmitter / receiver that causes the locking / unlocking execution unit of the control device to execute locking / unlocking of the object based on the control signal generated by the locking / unlocking signal generation unit. A radio wave handset and a control device communicate with each other via a wireless communication means to control locking / unlocking of a specific object,
Measure the distance between the object and the radio wave handset,
The radio wave handset detects acceleration given to itself, and transmits information on the acceleration to the control device,
The control device receives the transmitted acceleration information;
Based on the received information of the acceleration, it is determined that the radio wave transmitter is moving by the acceleration being equal to or greater than a predetermined acceleration threshold,
Based on the measured distance, it is determined that the radio wave transmitter / receiver is within a predetermined area by being equal to or less than a predetermined distance threshold,
When it is determined that the radio wave handset is within the predetermined area and the radio wave handset is determined to be moving, the object is unlocked,
If it is not determined that the radio wave handset is within the predetermined area, and the radio wave handset is determined to be moving, the object is locked,
If it is not determined that the radio wave transmitter is moving, maintain the locked state or unlocked state of the object,
Control method.

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