JP2009127244A - Keyless entry system, lock and unlock control method, and lock and unlock control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry system, capable of appropriately performing lock and unlock operations of a vehicle while preventing malfunction of a portable transmitter. <P>SOLUTION: An acceleration is detected by an acceleration sensor provided on the portable transmitter. Acceleration patterns corresponding to operations instructing lock and unlock of doors of the vehicle are preliminarily stored in the portable transmitter. Further, a predetermined acceleration pattern is preliminarily stored also as a malfunction factor pattern. Whether the pattern of the acceleration detected by the acceleration sensor is matched to the malfunction factor pattern or not is determined. When the pattern is not matched to the malfunction factor pattern, the acceleration detected by the acceleration sensor is compared with the acceleration patterns corresponding to the lock and unlock instructing operations to detect the lock or unlock operation. When the pattern is matched to the malfunction factor pattern, the lock instruction operation or unlock instruction operation is detected after changing the lock and unlock operation patterns based on the malfunction factor pattern. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a keyless entry system that enables a vehicle door lock operation without key operation. More specifically, the present invention relates to a door lock when a user carrying a transmitter approaches the vehicle and taps the transmitter. The present invention relates to a keyless entry system that can be operated.

  2. Description of the Related Art In recent years, a keyless entry device that performs a door lock operation by a radio signal using a transmitter instead of a key when opening and closing a vehicle door has been put into practical use. In these devices, generally, a transmitter carried by a user is provided with, for example, a push button type transmission switch, and when this transmission switch is operated by the user, a radio signal instructing unlocking is transmitted. In response to this, the door lock driving mechanism of the vehicle operates to unlock the vehicle.

  However, it is inconvenient to take out the transmitter in the pocket and press the transmission switch when the user has a baggage in both hands or it rains and puts on an umbrella. Therefore, assuming such a case, a lock operating device that performs unlocking by hitting a transmitter is disclosed (for example, Patent Document 1). In this lock operating device, the impact detection means using a spring plate and a magnet is used to detect the occurrence of impact (striking operation), and if an impact is detected, a signal for controlling the locking of the vehicle is transmitted from the transmitter to the vehicle side. Is output.

Also, as a technique using a means for detecting an impact on the transmitter, in addition to the above technique, an impact sensor is mounted on the transmitter, and when an impact of a certain value or more is detected, the output of the radio wave from the transmitter is A portable device that is prohibited is disclosed (for example, Patent Document 2). In the portable device disclosed in Patent Document 2, an impact when the portable device is dropped is detected from the viewpoint of preventing unauthorized use when the portable device (transmitter) is lost, and such an impact is detected. The transmission of radio waves from mobile devices is prohibited.
Japanese Patent Laid-Open No. 10-273984 JP 2004-324227 A

  However, the apparatus disclosed in the above-described patent document has the following problems. First, it is assumed that the apparatus disclosed in Patent Document 1 transmits a signal for unlocking when an impact of a predetermined level or more is detected twice. In this case, for example, when the transmitter is dropped or when it hits something with the transmitter in the pocket, an impact exceeding the predetermined level may be detected. As a result, it is conceivable that a malfunction occurs, for example, an unlock signal is output before the user notices.

  Moreover, the technique of patent document 2 prohibits a transmission function when an impact is detected from a viewpoint of unauthorized use prevention, and was not used for locking and unlocking.

  Therefore, an object of the present invention is to provide a keyless entry system that prevents malfunction of a portable transmitter and can appropriately lock and unlock a vehicle.

  The present invention employs the following configuration in order to solve the above problems. The reference numerals in parentheses, supplementary explanations, and the like are examples of the correspondence with the embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

  A first invention is a keyless entry system that includes a portable transmitter that can be carried by a user and a vehicle-side device attached to the vehicle, and that locks and unlocks the door of the vehicle via a wireless communication network. The portable transmitter includes an acceleration sensor (11), a locking / unlocking operation pattern storage unit (14), a malfunctioning pattern storage unit (14), a malfunctioning factor determination unit (13), and a locking / unlocking operation detection. A part (13) and a locking / unlocking signal transmission part (15) are provided. The acceleration sensor detects acceleration in at least one axial direction. The locking / unlocking operation pattern storage unit stores in advance a locking / unlocking operation pattern that is a variation pattern of acceleration corresponding to an operation for instructing locking and unlocking of the door of the vehicle. The malfunction pattern storage unit stores in advance a predetermined variation pattern of acceleration as a malfunction factor pattern. The malfunction factor determination unit determines whether or not the acceleration variation pattern based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern. The locking / unlocking operation detecting unit detects a locking instruction operation or an unlocking instruction operation based on an acceleration variation pattern based on the acceleration detected by the acceleration sensor and a locking / unlocking operation pattern. The locking / unlocking signal transmission unit wirelessly transmits a locking / unlocking signal according to the detection result of the locking / unlocking operation detection unit. Moreover, a vehicle side apparatus is provided with a receiving part (21) and a locking / unlocking control part (22). The receiving unit receives the locking / unlocking signal transmitted from the locking / unlocking signal transmitting unit. The locking / unlocking control unit controls locking or unlocking of the door of the vehicle based on the locking / unlocking signal received by the receiving unit. Furthermore, when the malfunction factor determination unit determines that the fluctuation pattern of acceleration based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern, the unlocking operation detection unit detects the unlocking operation based on the malfunction factor pattern. The pattern is changed, and the locking instruction operation or the unlocking instruction operation is detected based on the changed locking / unlocking operation pattern and the acceleration fluctuation pattern based on the acceleration detected by the acceleration sensor.

  According to the first invention, when the user drops the portable transmitter or when the user walks, the malfunction due to the operation of the portable transmitter or the like can be prevented, and the convenience for the user can be improved. It becomes possible.

  In a second aspect based on the first aspect, when the locking / unlocking operation detection unit determines that the variation pattern of acceleration based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern, the malfunction factor determination unit determines that The locking / unlocking operation pattern is changed so that the detection sensitivity of the locking / unlocking instruction operation becomes dull.

  According to the second invention, malfunction can be prevented more appropriately by reducing the detection sensitivity.

  In a third aspect based on the first aspect, the locking / unlocking operation pattern storage unit stores, as a locking / unlocking operation pattern, an acceleration variation pattern in which an acceleration equal to or greater than a predetermined threshold is detected a predetermined number of times at a predetermined time interval. To do.

  According to the third aspect of the invention, since the locking / unlocking pattern is determined based on the threshold value, the time interval, and the number of detections, the detection process can be simplified.

  In a fourth aspect based on the third aspect, the locking / unlocking operation detecting unit determines that the variation pattern of acceleration based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern. It changes so that the predetermined | prescribed threshold value in which the operation instruction of locking or unlocking is detected becomes high.

  According to the fourth aspect of the invention, it is possible to prevent malfunctions by reducing the detection sensitivity of locking and unlocking.

  A fifth invention includes an acceleration sensor, includes a portable transmitter that can be carried by a user and a vehicle-side device attached to the vehicle, and locks and unlocks the door of the vehicle via a wireless communication network. A locking / unlocking control method used for a keyless entry system, which includes an acceleration detection step, a locking / unlocking operation pattern storage step, a malfunction pattern storage step, a malfunction factor determination step, a locking / unlocking operation detection step, and a locking / unlocking method. A signal transmission step, a reception step, and a locking / unlocking control step are provided. In the acceleration detection step, acceleration in at least one axial direction is detected. In the locking / unlocking operation pattern storing step, a locking / unlocking operation pattern, which is a variation pattern of acceleration corresponding to an operation for instructing locking / unlocking of the door of the vehicle, is stored in advance. In the malfunction pattern storage step, a predetermined variation pattern of acceleration is stored in advance as a malfunction factor pattern. In the malfunction factor determination step, it is determined whether or not the acceleration variation pattern based on the acceleration detected in the acceleration detection step matches the malfunction factor pattern. In the locking / unlocking operation detection step, the locking instruction operation or the unlocking instruction operation is detected based on the acceleration variation pattern based on the acceleration detected in the acceleration detection step and the locking / unlocking operation pattern. In the locking / unlocking signal transmission step, the locking / unlocking signal is transmitted wirelessly according to the detection result of the locking / unlocking operation detecting unit. In the receiving step, the locking / unlocking signal transmitted in the locking / unlocking signal transmitting step is received. In the locking / unlocking control step, control of locking or unlocking the door of the vehicle is performed based on the locking / unlocking signal received in the receiving step. Furthermore, in the locking / unlocking operation detection step, when it is determined in the malfunction factor determination step that the fluctuation pattern of acceleration based on the acceleration detected in the acceleration detection step matches the malfunction factor pattern, based on the malfunction factor pattern The locking / unlocking operation pattern is changed, and the locking instruction / unlocking operation is detected based on the changed locking / unlocking operation pattern and the acceleration variation pattern based on the acceleration detected by the acceleration sensor.

  According to the fifth aspect, the same effect as in the first aspect can be obtained.

  A sixth invention is a locking / unlocking control program that is used in a keyless entry system that performs locking and unlocking of a vehicle door via a wireless communication network, and that is executed by a computer of a portable transmitter including an acceleration sensor, The computer of the portable transmitter is caused to function as acceleration detection means, locking / unlocking operation pattern storage means, malfunctioning pattern storage means, malfunctioning factor determination means, locking / unlocking operation detection means, and locking / unlocking signal transmission means. . The acceleration detection means detects acceleration in at least one axial direction. The locking / unlocking operation pattern storage means stores in advance a locking / unlocking operation pattern that is a variation pattern of acceleration corresponding to an operation for instructing locking and unlocking of the door of the vehicle. The malfunction pattern storage means stores in advance a predetermined variation pattern of acceleration as a malfunction factor pattern. The malfunction factor determination means determines whether or not an acceleration fluctuation pattern based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern. The locking / unlocking operation detecting means detects a locking instruction operation or an unlocking instruction operation based on an acceleration variation pattern based on the acceleration detected by the acceleration sensor and a locking / unlocking operation pattern. The locking / unlocking signal transmitting means wirelessly transmits a locking / unlocking signal according to the detection result of the locking / unlocking operation detecting unit. Further, when the malfunction factor determining unit determines that the acceleration variation pattern based on the acceleration detected by the acceleration detection unit matches the malfunction factor pattern, the locking / unlocking operation detecting unit locks / unlocks based on the malfunction factor pattern. The operation pattern is changed, and the locking instruction operation or the unlocking instruction operation is detected based on the changed locking / unlocking operation pattern and the acceleration variation pattern based on the acceleration detected by the acceleration sensor.

  According to the sixth aspect, the same effect as in the first aspect can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, malfunctioning by the fall of a portable transmitter or operation in walking etc. can be prevented, and it becomes possible to improve a user's convenience.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a diagram showing an overall configuration of a keyless entry system 3 according to an embodiment of the present invention. In FIG. 1, a keyless entry system 3 includes a portable transmitter 1 (hereinafter simply referred to as a portable device) that can be carried by a user and a vehicle-side device 2 provided in the vehicle.

  The portable device 1 includes a three-axis (x, y, z-axis) acceleration sensor 11, a buffer memory 12, a transmission control unit 13, a threshold storage unit 14, and a transmission unit 15. In addition, although not shown, a power source and a battery for operating these components are provided.

  The acceleration sensor 11 detects linear acceleration in the up-down direction, the left-right direction, and the front-rear direction in the XYZ three-dimensional orthogonal coordinate system. In addition, acceleration data indicating the detected acceleration is output to the buffer memory 12.

  The buffer memory 12 is a memory for storing acceleration data output from the acceleration sensor for a predetermined time. The buffer memory 12 is configured by a ring buffer method.

  The transmission control unit 13 is a circuit including a microcomputer, for example, and acquires acceleration data from the buffer memory 12. And the transmission control part 13 performs the process shown to the flowchart of FIGS. 5-6 mentioned later, performs transmission control, and outputs the signal for locking / unlocking to the transmission part 15. FIG.

  The threshold storage unit 14 stores various thresholds used when transmission control is executed by the transmission control unit 13 (such as a hit determination threshold as described later).

  The transmission unit 15 performs predetermined modulation or the like so that the signal output from the transmission control unit 13 can be transmitted as an electromagnetic wave from an antenna (not shown), and transmits the modulated signal to the reception unit 21.

  The vehicle side device 2 includes a receiving unit 21 and a locking / unlocking control unit 22. The reception unit 21 receives a signal transmitted from the transmission unit 15 of the portable device 1. The receiving unit 21 performs predetermined demodulation or the like, converts the received signal into a format that can be read by the locking / unlocking control unit 22, and outputs the converted signal.

  The locking / unlocking control unit 22 is a circuit including a microcomputer, for example, and performs processing shown in a flowchart of FIG. 7 to be described later, and controls locking and unlocking of the vehicle door based on the received signal.

  Next, an overview of processing assumed in the present embodiment will be described. First, in this embodiment, the user can lock / unlock the door of the vehicle by performing an operation of hitting the portable device 1. More specifically, when the user taps the portable device 1 once, a signal for locking the door is transmitted from the portable device 1 to the vehicle-side device 2 and the door of the vehicle is locked. When the user strikes the portable device 1 twice in succession, a signal for unlocking the door is transmitted from the portable device 1 to the vehicle-side device 2 and the vehicle door is unlocked. In the present embodiment, whether or not the user has hit the portable device 1 is determined based on the acceleration. That is, when the user strikes the portable device 1, an acceleration greater than a predetermined value is generated in the portable device 1. Therefore, the lock operation and the unlock operation are detected by determining this acceleration change pattern at any time and determining whether or not the change pattern of the acceleration when the portable device 1 is struck has occurred. Therefore, data indicating a variation pattern of acceleration corresponding to the hitting operation as described above is stored in the portable device 1 in advance.

  Furthermore, in the present embodiment, the variation pattern of the acceleration of an operation that causes a malfunction (hereinafter referred to as a malfunction factor) is stored in the portable device 1 in advance. In the present embodiment, there are four cases of the malfunction factors: “walking”, “falling”, “collision”, and “putting hand in pocket”. A variation pattern of acceleration when these four malfunction factors occur is calculated in advance through experiments or simulations and stored in the portable device 1. Then, at the time of the lock / unlock determination, it is also determined whether or not it corresponds to these malfunction factors.

  Here, the above-described lock / unlock operation and the variation pattern of the acceleration regarding the malfunction factor will be described with reference to FIG. FIG. 2 is a graph showing an example of fluctuations in acceleration in the gravitational direction (waveforms of acceleration data). FIG. 2A shows an example of acceleration variation in the direction of gravity when the user strikes the portable device 1 once (locking operation). In FIG. 2A, the acceleration at the time of tapping greatly fluctuates from the negative region toward the positive region, and then fluctuates toward the negative region due to the reaction. That is, the waveform has one peak (vibration) that fluctuates from negative region → positive region → negative region. Moreover, FIG.2 (b) has shown an example of the fluctuation | variation of the acceleration of the gravity direction when a user taps the portable device 1 twice (unlock operation). In FIG. 2B, the waveform is such that two fluctuating peaks are generated in succession from the negative region to the positive region to the negative region.

  FIG. 2C is a graph showing an example of fluctuations in acceleration in the direction of gravity when “walking”. In the waveform of the acceleration data shown in FIG. 2 (c), there appears a pattern that fluctuates from a negative region to a positive region and changes toward the negative region in substantially the same cycle. It has a waveform. In other words, the graph is such that vibrations of the same magnitude appear continuously.

  FIG. 2D is a graph showing an example of fluctuations in acceleration in the gravity direction in the case of “falling”. In FIG. 2 (d), the acceleration suddenly changes in the positive region direction (hereinafter referred to as the positive direction) (during falling), and then the negative region direction (hereinafter referred to as the negative direction) due to the reaction that collided with the ground or the like. ). Thereafter, a change between the positive direction and the negative direction repeatedly occurs, but the width of the change gradually decreases.

  FIG. 2E is a graph showing an example of fluctuations in acceleration in the direction of gravity in the case of “collision”. “Bumping” is a situation where, for example, the portable device 1 placed in a pocket or the like bumps into something while in the pocket (that is, the user who put the portable device 1 in the pocket hits something) Situation). The change pattern of acceleration is basically the same change as “falling”, but the change is not as great as when “falling”.

  FIG. 2F is a graph showing an example of fluctuations in acceleration in the direction of gravity in the case of “putting a hand in the pocket”. This state assumes a situation in which the user places the hand in the pocket and moves the portable device 1 roughly while the portable device 1 is in the pocket. Therefore, the mobile device 1 is in a state where small acceleration fluctuations (small vibrations) are continuously generated.

  In the present embodiment, the acceleration fluctuation pattern as described above is assumed. In order to determine each pattern, a predetermined threshold value is set for each pattern and stored in the threshold value storage unit 14. And based on the said threshold value and the acceleration detected with the portable device 1, it enables it to determine said pattern. For example, for the lock / unlock operation, as shown in FIGS. 3 (a) and 3 (b), a threshold value 101 (hereinafter referred to as a hit determination threshold value) that is applied to a large change mountain is set, as described above. (In FIG. 3A, the hit determination threshold value 101a indicates a threshold value in a positive region, and 101b indicates a threshold value in a negative region). Then, the portable device 1 detects a change in acceleration within a predetermined time in the past (for example, immediately before 5 seconds), and calculates the number of times that the hit determination threshold is exceeded. Also, the acceleration change direction (whether the change is from the negative region to the positive region or the opposite direction) is calculated based on the acceleration immediately before exceeding the hit determination threshold. Then, based on these calculated results, it is determined whether or not a lock / unlock operation has been performed.

  For each malfunction factor, a threshold value is set as shown in FIGS. For “walking”, a walking threshold value 102 as shown in FIG. 3C is set and stored in the threshold value storage unit 14. Similarly, for “fall”, a drop threshold 103 as shown in FIG. With respect to “collision”, a collision threshold 104 as shown in FIG. For “putting hand in pocket”, a pocket threshold 105 as shown in FIG.

  Here, assuming that the malfunction factor is ignored and only the lock / unlock determination is performed, for example, when the user drops the portable device 1 (corresponding to the “fall” of the malfunction factor). An acceleration exceeding the hit determination threshold value 101 can be detected. Therefore, if the malfunction factor is not determined, it is determined that the portable device 1 has been tapped once and is recognized as a lock instruction, resulting in a malfunction that is contrary to the user's intention. . Therefore, in the present embodiment, as described above, the acceleration fluctuation pattern corresponding to the malfunction factor is stored in advance. Then, before the determination of the lock / unlock operation, it is determined by using the drop threshold value or the like whether or not the detected variation in acceleration corresponds to the malfunction factor as described above. And when it determines with falling into a malfunction factor, the hit threshold set for the determination of the said lock / unlock is changed so that the sensitivity of the portable device 1 may become dull. That is, the portable device 1 is made insensitive to the tapping operation. Then, whether or not a lock / unlock operation has been performed is determined based on whether or not the threshold value after the change has been exceeded.

  FIG. 4 shows an example of changing the hit determination threshold. FIG. 4A shows an example of changing the hit determination threshold value when “walking”. 4B shows an example of changing the hit determination threshold value in the case of “falling”, FIG. 4C in the case of “collision”, and FIG. 4D in the case of “pocket”. In any case, the threshold value before the change corresponds to the threshold value 101 in FIGS. The hit determination threshold is changed in the positive direction so that the detection sensitivity becomes dull.

  As described above, by determining whether or not there is a malfunction factor when determining the lock / unlock operation, it is possible to prevent malfunction of the lock / unlock of the portable device 1 due to dropping or the like. Can be increased.

  Hereinafter, details of the lock operation processing in the present embodiment will be described with reference to FIGS. First, processing on the portable device 1 side will be described. FIG. 5 and FIG. 6 are flowcharts showing details of control processing executed by the portable device 1. Note that the processing loop of steps S1 to S15 shown in FIGS. 5 and 6 is repeatedly executed every 1/60 seconds.

  In FIG. 5, first, the acceleration sensor 11 outputs acceleration data to the buffer memory 12 (step S1). Then, the transmission control unit 13 refers to the buffer memory 12 and calculates a change pattern of acceleration data in the gravity direction for a predetermined time, for example, the past 5 seconds (step S2). In addition, since the calculation method of the acceleration of a gravitational direction is well-known to those skilled in the art, description is abbreviate | omitted here.

  Next, the transmission control unit 13 determines whether or not the calculated variation pattern of acceleration indicates “in walking” (step S3). That is, it is determined whether or not the user is currently walking. That is, the transmission control unit 13 determines whether or not the acceleration fluctuation pattern for the past 5 seconds is a fluctuation pattern as shown in FIG. For example, the determination is made based on whether or not the acceleration amplitude exceeding the walking threshold 102 is continuously generated.

  If the result of the determination is “walking” (YES in step S3), the transmission control unit 13 changes the hit determination threshold (step S4). That is, the transmission control unit 13 adds the predetermined value to the hit determination threshold, thereby changing the hit determination threshold so that the detection of the hit operation is insensitive as shown in FIG.

  If the result of determination in step S3 is not “walking” (NO in step S3), then the transmission control unit 13 determines whether or not the variation pattern calculated in step S2 indicates “falling” ( Step S5). That is, the transmission control unit 13 determines whether or not the acceleration fluctuation pattern for the past 5 seconds is a fluctuation pattern as shown in FIG. (For example, it is determined whether or not a large amplitude exceeding the drop threshold 103 has occurred). If the result of the determination is “fall” (YES in step S5), the transmission control unit 13 increases the hit determination threshold so that the detection of the hit operation is insensitive as shown in FIG. 4B. The value is changed (step S6).

  On the other hand, when it is not “falling” (NO in step S5), the transmission control unit 13 then determines whether or not the change pattern calculated in step S2 indicates “collision” (step S7). That is, the transmission control unit 13 determines whether or not the acceleration fluctuation pattern for the past 5 seconds is a fluctuation pattern as shown in FIG. As a result of the determination, if it is “collision” (YES in step S7), the transmission control unit 13 sets the hit determination threshold value so that the detection of the hit operation becomes insensitive as shown in FIG. Change (step S8).

  On the other hand, if the result of determination in step S7 is that the variation pattern is not “collision” (NO in step S7), then the transmission control unit 13 determines that the variation pattern calculated in step S2 is “put in pocket. Is determined (step S9). That is, the transmission control unit 13 determines whether or not the acceleration change pattern for the past 5 seconds is a pattern in which small fluctuation waves are continuously generated as shown in FIG. judge. As a result of the determination, if “the hand has been put in the pocket” (YES in step S9), the transmission control unit 13 makes the detection of the tapping operation insensitive as shown in FIG. The hit determination threshold is changed (step S11). On the other hand, when it is not “put your hand in the pocket” (NO in step S9), the transmission control unit 13 sets the hit determination threshold value to the initial value (the hit determination threshold value 101 shown in FIGS. 3A and 3B). Equivalent)) (step S10).

  Next, the transmission control unit 13 determines whether or not the change pattern calculated in Step S2 is a lock operation pattern using the pattern determination threshold as described above (Step S12). For example, the transmission control unit 13 detects the number of times of acceleration vibration that has exceeded the hit determination threshold in the past 5 seconds, and determines that the pattern is a lock operation pattern if the number is one. As a result of the determination, when it is determined that the pattern is a lock operation pattern (YES in step S12), the transmission control unit 13 generates a signal indicating a lock instruction. And the signal of the said lock instruction | indication is transmitted to the vehicle side apparatus 2 via the transmission part 15 (step S13).

  On the other hand, when the pattern is not a lock operation pattern (NO in step S12). It is determined whether or not the calculated variation pattern is an unlock operation pattern (step S14). For example, the transmission control unit 13 detects the number of times that the vibration of the acceleration exceeding the hitting determination threshold has occurred in the past 5 seconds, and determines that the pattern is an unlock operation pattern if the number is 2 times. . As a result of the determination, when it is determined that the pattern is an unlock operation pattern (YES in step S14), the transmission control unit 13 generates a signal indicating an unlock instruction. And the signal of the said unlocking instruction is transmitted to the vehicle side apparatus 2 via the transmission part 15 (step S15). And the transmission control part 13 returns to said step S1, and repeats a process. This is the end of the description of the control process on the portable device 1 side.

  Next, processing of the vehicle side device 2 will be described. FIG. 7 is a flowchart showing details of the control process executed by the vehicle-side device 2. Note that the processing loop from step S31 to step 35 shown in FIG. 7 is repeatedly executed every 1/60 seconds. In FIG. 7, first, the reception unit 21 waits for a signal to be transmitted from the transmission unit 15. And if a signal is transmitted, the reception will be performed. And the receiving part 21 outputs the received signal to the locking / unlocking control part 22 (step S31).

  Next, the locking / unlocking control unit 22 determines whether or not the received signal is a content indicating a lock instruction (step S32). If the result of this determination is a lock instruction (YES in step S32), the locking / unlocking control unit 22 outputs a lock signal for locking the vehicle door (step 33).

  On the other hand, when it is not a lock instruction (NO in step S32), the locking / unlocking control unit 22 then determines whether or not the received signal is a content indicating an unlock instruction (step S34). If the result of the determination is an unlock instruction (YES in step S34), the locking / unlocking control unit 22 outputs an unlock signal for unlocking the vehicle door (step S35).

  If the result of determination in step S34 is not an unlock instruction (NO in step S34), the process returns to step S31 and the process is repeated. This is the end of the description of the control process on the vehicle side.

  As described above, in this embodiment, the malfunction factor is also determined when the lock / unlock operation is determined based on the acceleration change pattern. When the acceleration fluctuation pattern corresponds to a malfunction factor, adjustment is performed so that the detection of the hitting operation becomes insensitive. Thereby, when the user drops the portable device 1, it is possible to prevent the portable device 1 from malfunctioning and locking or unlocking the vehicle door against the user's will.

  In the above embodiment, the case where the past 5 seconds are uniformly used as the acceleration data that is the basis for the determination of the malfunction factor is taken as an example. Not limited to this, a different time may be used for each malfunction factor. For example, the acceleration data for the past 5 seconds may be used for the determination of “walking”, and the “fall” or “collision” may be determined based on the change in acceleration for the past 3 seconds. In addition, “put your hand in the pocket” may be determined using acceleration data for the past 10 seconds.

  Moreover, in the said embodiment, although the acceleration sensor was mounted in the portable machine which a user can carry, you may make it incorporate an acceleration sensor in the door of a vehicle not only this. That is, a lock / unlock operation may be enabled by a user directly hitting the door of the vehicle instead of a portable device. In this case, what is necessary is just to mount the structure part except the transmission part 15 among the structures of the portable device 1 shown in FIG. Then, instead of the output from the transmission control unit 13 to the transmission unit 15, the connection may be made so as to be output from the transmission control unit 13 to the locking / unlocking control unit 22.

  In addition, as a malfunction factor when the acceleration sensor 11 is built in the door of the vehicle, unlike the case of the above embodiment, for example, a large vehicle such as a large truck, a bus, or a train passes through the parked vehicle side. The thing which assumed the vibration which arises by this can be considered. For this reason, a variation pattern of acceleration due to vibration caused by the passage of such a large vehicle is calculated in advance through experiments, simulations, and the like, and data that can determine the variation pattern is stored in the threshold storage unit 14. And it is determined whether it corresponds to the vibration at the time of the passage of such a large vehicle instead of the process of determination of the malfunction factor concerning said step S3-S11 demonstrated using FIG. 5 and FIG. You can do it. Thereby, it becomes possible to improve a user's convenience.

  Further, when the acceleration sensor 11 is built in the door of the vehicle, it may be further linked with a personal authentication system. In other words, the lock / unlock operation may be performed only when the legitimate owner of the vehicle hits the door. In this case, for example, an ID code for performing personal authentication is registered in the portable device and the vehicle. And when it is detected on the vehicle side that the door of the vehicle has been hit, whether or not the portable device in which this ID code is registered exists on the side of the door, and the ID registered in the vehicle It is determined whether or not a code has been transmitted from the portable device. That is, processing for personal authentication is executed in accordance with detection of the lock / unlock operation. Thus, even when a person who is not a proper owner hits the door, the vehicle door can be prevented from being locked / unlocked.

  INDUSTRIAL APPLICABILITY The keyless entry system, the locking / unlocking control method, and the locking / unlocking control program according to the present invention can prevent malfunction of the portable transmitter, and are useful for a lock operation device such as a remote key entry system or a smart entry system of a vehicle. It is.

The figure which showed the whole structure of the keyless entry system 3 which concerns on embodiment of this invention. Graph showing an example of changes in acceleration in the direction of gravity Setting example of threshold for each malfunction factor Example of changing the hit detection threshold The flowchart which shows the detail of the control processing performed with the portable device 1 The flowchart which shows the detail of the control processing performed with the portable device 1 The flowchart which shows the detail of the control processing performed with the vehicle side apparatus 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable transmitter 2 Vehicle side apparatus 11 Acceleration sensor 12 Buffer memory 13 Transmission control part 14 Threshold storage part 15 Transmission part 21 Reception part 22 Locking / unlocking control part

Claims (6)

A keyless entry system comprising a portable transmitter that can be carried by a user and a vehicle-side device attached to the vehicle, wherein the door of the vehicle is locked and unlocked via a wireless communication network,
The portable transmitter is:
An acceleration sensor for detecting acceleration in at least one axial direction;
A locking / unlocking operation pattern storage unit that stores in advance a locking / unlocking operation pattern that is a variation pattern of acceleration corresponding to an operation for instructing locking / unlocking of the door of the vehicle;
A malfunction pattern storage unit that stores in advance a predetermined variation pattern of acceleration as a malfunction factor pattern;
A malfunction factor determination unit that determines whether or not a variation pattern of acceleration based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern;
A locking / unlocking operation detecting unit that detects an instruction operation of locking or an instruction operation of unlocking based on a variation pattern of acceleration based on the acceleration detected by the acceleration sensor and the locking / unlocking operation pattern;
A locking / unlocking signal transmission unit that wirelessly transmits a locking or unlocking signal according to the detection result of the locking / unlocking operation detection unit,
The vehicle side device
A receiving unit for receiving the locking / unlocking signal transmitted from the locking / unlocking signal transmitting unit;
A locking / unlocking control unit that controls locking or unlocking of the door of the vehicle based on the locking / unlocking signal received by the receiving unit;
When the locking / unlocking operation detection unit determines that the acceleration variation pattern based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern, the malfunction factor determination unit determines the malfunction factor pattern based on the malfunction factor pattern. Keyless for changing the locking / unlocking operation pattern and detecting the locking instruction / unlocking operation based on the changed locking / unlocking operation pattern and the acceleration fluctuation pattern based on the acceleration detected by the acceleration sensor. Entry system.   The locking / unlocking operation detecting unit, when the malfunction factor determining unit determines that the acceleration variation pattern based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern, the locking / unlocking instruction operation The keyless entry system according to claim 1, wherein the locking / unlocking operation pattern is changed so as to reduce the detection sensitivity.   2. The keyless entry according to claim 1, wherein the locking / unlocking operation pattern storage unit stores, as the locking / unlocking operation pattern, an acceleration variation pattern such that an acceleration equal to or greater than a predetermined threshold is detected a predetermined number of times at a predetermined time interval. system.   The locking / unlocking operation detecting unit, when the malfunction factor determining unit determines that an acceleration variation pattern based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern, is an operation instruction for the locking or unlocking The keyless entry system according to claim 3, wherein the predetermined threshold value at which the detection is detected is changed to be higher. A keyless entry system that includes an acceleration sensor and includes a portable transmitter that can be carried by the user and a vehicle-side device attached to the vehicle, and that locks and unlocks the door of the vehicle via a wireless communication network. A locking / unlocking control method,
An acceleration detecting step for detecting acceleration in at least one axial direction;
An unlocking / unlocking operation pattern storing step for storing in advance a locking / unlocking operation pattern that is a variation pattern of acceleration corresponding to an operation for instructing locking / unlocking of the door of the vehicle;
A malfunction pattern storing step for storing in advance a predetermined variation pattern of acceleration as a malfunction factor pattern;
A malfunction factor determination step for determining whether or not an acceleration variation pattern based on the acceleration detected in the acceleration detection step matches the malfunction factor pattern;
A locking / unlocking operation detecting step for detecting an instruction operation for locking or an instruction operation for unlocking based on a variation pattern of acceleration based on the acceleration detected in the acceleration detecting step and the locking / unlocking operation pattern;
A locking / unlocking signal transmission step of wirelessly transmitting a locking or unlocking signal according to a detection result of the locking / unlocking operation detection unit;
A receiving step of receiving the locking / unlocking signal transmitted in the locking / unlocking signal transmission step;
A locking / unlocking control step for controlling the locking or unlocking of the door of the vehicle based on the locking / unlocking signal received in the receiving step,
When the unlocking operation detecting step determines in the malfunction factor determining step that the fluctuation pattern of acceleration based on the acceleration detected in the acceleration detecting step matches the malfunction factor pattern, the malfunction factor pattern is determined as the malfunction factor pattern. The locking / unlocking operation pattern is changed based on the change, and the locking / unlocking operation pattern is detected based on the changed locking / unlocking operation pattern and the acceleration variation pattern based on the acceleration detected by the acceleration sensor. A locking / unlocking control method. A locking / unlocking control program that is used in a keyless entry system that performs locking and unlocking of a vehicle door via a wireless communication network, and that is executed by a computer of a portable transmitter including an acceleration sensor,
The computer,
Acceleration detecting means for detecting acceleration in at least one axial direction;
Locking / unlocking operation pattern storage means for storing in advance a locking / unlocking operation pattern which is a variation pattern of acceleration corresponding to an operation for instructing locking / unlocking of the door of the vehicle;
A malfunction pattern storage means for storing in advance a predetermined variation pattern of acceleration as a malfunction factor pattern;
A malfunction factor determination means for determining whether or not a variation pattern of acceleration based on the acceleration detected by the acceleration sensor matches the malfunction factor pattern;
A locking / unlocking operation detecting means for detecting an instruction operation for locking or an instruction operation for unlocking based on a variation pattern of acceleration based on the acceleration detected by the acceleration sensor and the locking / unlocking operation pattern;
According to the detection result of the locking / unlocking operation detection unit, function as locking / unlocking signal transmitting means for wirelessly transmitting locking or unlocking signal,
When the malfunction factor determining unit determines that the acceleration variation pattern based on the acceleration detected by the acceleration detection unit matches the malfunction factor pattern, the locking / unlocking operation detection unit is based on the malfunction factor pattern. Changing the locking / unlocking operation pattern and detecting the locking instruction / unlocking operation based on the changed locking / unlocking operation pattern and an acceleration variation pattern based on the acceleration detected by the acceleration sensor; Locking / unlocking control program.

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