JP2008138463A - Keyless entry device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry device which determines whether a portable machine is present inside or outside a vehicle with good accuracy. <P>SOLUTION: The portable machine is located along one side of a predetermined boundary face. A plurality of intensity information obtained by allowing the portable machine to receive signals transmitted from a plurality of transmission antennas 15a-15f are made to be data at the one side of the predetermined boundary face. The portable machine is located along the other side of the predetermined boundary face. A plurality of intensity information obtained by allowing the portable machine to receive signals transmitted from the plurality of the transmission antennas 15a-15f are made to be data at the other side of the predetermined boundary face. A neural network model formed of the data at the one side and the data at the other side is stored in a memory. A control part at the vehicle side determines whether the portable machine is present at either the one side or the other side of the predetermined boundary face from an output obtained by inputting the intensity information which the portable machine really obtains into the neural network model stored in the memory. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a keyless entry device that locks / unlocks a vehicle door by performing wireless communication between a vehicle-side device and a portable device, and in particular accurately determines whether the portable device is inside or outside a predetermined boundary surface. It is related with the keyless entry device which can do.

2. Description of the Related Art Conventionally, a keyless entry device that performs wireless communication between a vehicle-side device provided in a vehicle and a portable device carried by a user to lock / unlock a vehicle door is known. Further, in recent years, when a portable device approaches a vehicle, communication is automatically performed between the vehicle-side device and the portable device, and if the authentication of the ID uniquely set for each portable device is performed, the vehicle door There is also known a passive keyless entry device that performs a lock / unlock operation. An example of such a keyless entry device is disclosed in Patent Document 1.
JP 2002-77972 A

  In particular, in a passive keyless entry device, it is important to be able to determine whether the portable device is outside or inside the vehicle. For this reason, the vehicle side device is provided with a plurality of transmission antennas at various locations of the vehicle, and when the portable device receives radio waves from the transmission antenna inside the vehicle, it is determined that the portable device is in the vehicle, When radio waves are received from the outside transmitting antenna, it is determined that the portable device is outside the vehicle.

  However, the conventional keyless entry device cannot be said to have sufficient accuracy for determining the position of the portable device. For example, if the radio wave from the transmission antenna inside the vehicle leaks to the outside of the vehicle, it may be erroneously determined that the portable device is inside the vehicle even if it is outside the vehicle. Conversely, when radio waves from the transmission antenna on the outside of the vehicle leak into the vehicle, it may be erroneously determined that the portable device is on the outside of the vehicle even if it is inside the vehicle. If the transmission power of the radio wave from the transmission antenna is reduced in order to prevent the leakage of the radio wave, the radio wave may not be received even if the portable device is in the vehicle, which may also cause an erroneous determination.

  Patent Document 1 discloses that a reception intensity is detected for each of a plurality of transmission antennas of a vehicle and an area where a portable device exists is determined by comparing them. However, even in this case, misjudgment is unavoidable and does not have sufficient accuracy.

  In addition, the position of the portable device is determined not only in the inside / outside of the vehicle but also in the outside or inside of the position away from the door by a predetermined distance. In this case, for example, when it is determined that the portable device has approached a predetermined distance or less with respect to the door, an operation such as turning on a lamp can be performed. For this reason, there is a demand for a keyless entry device that can accurately determine which side of the predetermined boundary surface the portable device is not limited to the boundary surface inside and outside the vehicle.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a keyless entry device capable of accurately discriminating on which side of a vehicle internal / external boundary surface or other predetermined boundary surface a portable device exists. And

In order to solve the above-described problem, a keyless entry device according to the present invention includes a vehicle-side transmission unit that is provided in a vehicle and has a plurality of transmission antennas that transmit request signals, and a vehicle-side reception unit that receives an answer signal. In a keyless entry device having a vehicle-side device, a portable device including a portable device receiver that receives the request signal, and a portable device transmitter that transmits an answer signal,
The vehicle-side device includes a vehicle-side control unit that performs predetermined control when an answer signal from the portable device is authenticated, and the portable device detects each intensity of a signal transmitted from a plurality of transmission antennas of the vehicle-side device. A portable device control unit,
The vehicle-side control unit or portable device control unit includes a memory for storing data,
In the memory, the portable device receives signals transmitted from the plurality of transmission antennas when the portable device is positioned along one side of a predetermined boundary surface with respect to the vehicle. When the portable device is positioned along the other side of the predetermined boundary surface with respect to the vehicle, the plurality of intensity information is transmitted from the plurality of transmission antennas. A neural network model created from the one side data and the other side data is stored as a plurality of intensity information obtained by receiving the signal to be received by the portable device as the other side data of the predetermined boundary surface,
The vehicle-side control unit or the portable device control unit provided with the memory is configured so that the portable device is based on an output obtained by inputting the intensity information actually obtained by the portable device to the neural network model stored in the memory. It is configured to determine which side of the predetermined boundary surface exists.

A keyless entry device according to the present invention includes a vehicle-side device that includes a vehicle-side transmission unit that is provided in a vehicle and transmits a request signal, and a vehicle-side reception unit that has a plurality of reception antennas that receive an answer signal. In a keyless entry device having a portable device including a portable device receiver that receives the request signal and a portable device transmitter that transmits an answer signal,
The vehicle-side device includes a vehicle-side control unit that performs predetermined control when an answer signal from the portable device is authenticated, and the vehicle-side control unit receives signals transmitted from the portable device received by the plurality of receiving antennas. Each intensity can be detected,
The vehicle-side control unit includes a memory for storing data,
In the memory, when the portable device is positioned along one side of a predetermined boundary surface with respect to the vehicle, the plurality of receiving antennas receive signals transmitted from the portable device. A signal transmitted from the portable device when the portable device is positioned along the other side of the predetermined boundary surface with respect to the vehicle, using the plurality of intensity information as data on one side of the predetermined boundary surface. A plurality of intensity information obtained by receiving the plurality of receiving antennas as the other side data of the predetermined boundary surface, a neural network model created from the one side data and the other side data is stored,
The vehicle-side control unit is configured so that the portable device is connected to any one of the predetermined boundary surfaces based on an output obtained by inputting the intensity information actually obtained by the vehicle-side device to the neural network model stored in the memory. It is configured to determine whether it exists on the side.

  According to the keyless entry device of the present invention, the portable device is positioned along one side of the predetermined boundary surface in the memory, and a plurality of signals obtained by the portable device receiving signals transmitted from the plurality of transmitting antennas. The intensity information is one side data of the predetermined boundary surface, the portable device is positioned along the other side of the predetermined boundary surface, and the plurality of intensity information obtained by the portable device receiving signals transmitted from the plurality of transmitting antennas. As the other side data of the predetermined boundary surface, the neural network model created from the one side data and the other side data is stored, the vehicle side control unit or the portable device control unit, the intensity information actually obtained by the portable device, From the output obtained by inputting to the neural network model stored in the memory, the side of the signal received by the portable device is determined by determining which side of the predetermined boundary surface the portable device exists. Since whether there from degrees information or outside the inside of the vehicle can be determined by the neural network can be performed accurately position determination.

  Further, according to the keyless entry device according to the present invention, the portable device is positioned along one side of the predetermined boundary surface in the memory, and the signals transmitted from the portable device are received by the plurality of receiving antennas. A plurality of intensity information is set as one side data of a predetermined boundary surface, a portable device is positioned along the other side of the predetermined boundary surface, and a plurality of signals obtained from a plurality of receiving antennas are received by a plurality of receiving antennas. Stores the neural network model created from the one side data and the other side data using the strength information as the other side data of the predetermined boundary surface, and the vehicle side control unit stores the strength information actually obtained by the vehicle side device in the memory. Similarly, it is possible to determine which side of the predetermined boundary surface the mobile device is from the output obtained by inputting to the stored neural network model. Precise position determination by can be performed.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic diagram of a keyless entry device according to this embodiment. The keyless entry device in the present embodiment locks or unlocks the door 1a of the vehicle 1. The vehicle-side device 2 is provided on the vehicle 1, the user carries the portable device 3, and the vehicle-side device. Wireless communication is performed between the mobile phone 2 and the portable device 3 to issue authentication, lock / unlock commands, and the like. The vehicle-side device 2 has a plurality of transmission antennas 15 at various locations of the vehicle 1, and a request signal is transmitted from each transmission antenna 15 to the portable device 3. The request signal is a low frequency signal.

  Hereinafter, a case where the user approaches the vehicle 1 and unlocks the door 1a will be mainly described. In the present embodiment, in order to unlock the door 1a, the user with the portable device 3 needs to press the request switch 16 provided in the vicinity of the door knob 1b of the door 1a. When the request switch 16 is pressed, communication such as authentication is performed between the vehicle side device 2 and the portable device 3, and the vehicle side device 2 unlocks the door 1a when authentication is performed.

  Next, the structure of the vehicle side apparatus 2 and the portable device 3 is demonstrated. FIG. 2 shows a block diagram of the keyless entry device. As shown in this figure, the vehicle-side device 2 includes a vehicle-side receiver 10 that receives an answer signal from the portable device 3, a vehicle-side transmitter 11 that transmits a request signal to the portable device 3, and an answer signal. And a vehicle-side control unit 12 that performs various controls when the request switch 16 is pressed.

  In addition, the vehicle-side control unit 12 stores information necessary for control, such as V-ID (Vicle-ID), which is a vehicle-specific identification code, and IDs of a plurality of portable devices capable of operating one vehicle. 13 and the request switch 16 described above are connected. Furthermore, a receiving antenna 14 for receiving an answer signal is connected to the vehicle-side receiving unit 10, and a plurality of transmitting antennas 15 and 15 for transmitting a request signal are connected to the vehicle-side transmitting unit 11. The plurality of transmission antennas 15 and 15 are provided at various locations inside and outside the vehicle 1, respectively.

  FIG. 3 shows the arrangement of the reception antenna 14 and the transmission antenna 15 in the vehicle 1. One receiving antenna 14 is provided in the vehicle 1, while a plurality of transmitting antennas 15 are provided inside and outside the vehicle 1 up to the transmitting antennas 15a to 15f. In the present embodiment, three transmission antennas 15 a to 15 c are provided inside the vehicle 1, and three transmission antennas 15 d to 15 f are provided outside the vehicle 1.

  As shown in FIG. 2, the portable device 3 includes a portable device receiver 20 that receives a request signal from the vehicle-side device 2, a portable device transmitter 21 that transmits an answer signal to the vehicle-side device 2, and a request. It has a portable device control unit 22 that performs various controls when a signal is received, and a memory 24 that stores IDs, V-IDs, and the like set in the device itself. In addition, a three-axis antenna 23 that transmits and receives request signals and answer signals is connected to the portable device receiver 20 and the portable device transmitter 21. The triaxial antenna 23 has directivity characteristics in directions perpendicular to each other.

  The portable device control unit 22 switches from the sleep state in which the power consumption is substantially zero to the normal state by the wakeup signal included in the request signal from the vehicle side device 2 received by the portable device reception unit 20. In addition, the portable device control unit 22 performs various operations based on commands included in the request signal. Furthermore, the portable device control unit 22 can detect the intensity of the signal received by the triaxial antenna 23.

  The memory 13 of the vehicle apparatus 2 stores an ID necessary for authentication of the portable device 3 and a neural network model for determining the position of the portable device 3. In this embodiment, in order to determine whether the portable device 3 is located inside or outside the vehicle 1, the vehicle-side control unit 12 stores the intensity information of the signal received by the portable device 3 in the memory 13. The obtained neural network model is input, and an output is obtained from the input neural network model for determination. Hereinafter, the neural network model stored in the memory 13 will be described.

  First, data necessary for learning the neural network model is acquired in advance. FIG. 4 is a schematic plan view showing data acquisition in the vicinity of the vehicle 1. In the present embodiment, when the body of the vehicle 1 is a predetermined boundary surface and the portable device 3 is positioned along the vehicle exterior that is one side of the predetermined boundary surface, the vehicle 1 is transmitted from the plurality of transmission antennas 15. A plurality of pieces of intensity information obtained by the portable device 3 receiving the signal is obtained as one-side data. One side data was acquired along a curved surface 10 cm outward from the body of the vehicle 1 (hereinafter referred to as one first data) and along a curved surface 15 cm away from the body of the vehicle 1. Data (hereinafter referred to as one second data).

  Further, when the portable device 3 is positioned along the vehicle interior which is the other side of the predetermined boundary surface, a plurality of pieces of intensity information obtained by the portable device 3 receiving signals transmitted from the plurality of transmission antennas 15 are obtained. Acquired as the other side data. The other side data is data acquired along a curved surface that is 0 cm away from the body of the vehicle 1 (that is, the portable device 3 is positioned so as to be in contact with the body of the vehicle 1 from the indoor side) (hereinafter, the other first data). And data acquired along a curved surface 5 cm away from the body of the vehicle 1 (hereinafter referred to as the second data).

  Each data of the one side data and the other side data has information on the radio wave intensity obtained by the portable device 3 for each transmission antenna 15. A large number of such data is acquired in advance over substantially the entire circumference inside and outside the vehicle 1. The acquisition of these data is performed for the actual vehicle 1 using the portable device 3 or the strength measuring device at the time of product development. Alternatively, data can be acquired on the production line.

  Next, a score is assigned to each data of the one side data and the other side data. The score assigned here is input to the output layer when learning a neural network model described later. Specifically, a score of 50 is assigned to all data of the first data on one side, a score of 100 is assigned to all data of the second data of one side, a score of -40 is assigned to all data of the other first data, and All data is assigned a score of -100. Note that the score assignment here is an example, and the numerical value of the score can be set as appropriate.

  Subsequently, the neural network model is learned by the one side data and the other side data. The model employed here is a multi-layered neural network model composed of an input layer, an intermediate layer, and an output layer, and the learning method is an error back propagation learning method.

  FIG. 5 shows a schematic diagram of a neural network model used in the present embodiment. Circles in the figure represent neurons, and arrows represent connections between neurons. The multi-layer structure neural network model shown in this figure is a model composed of only one-way connections from the input layer to the output layer. In addition, in this figure, the intermediate layer is represented by a single line for simplification, but in reality, it is assumed that it has a plurality of columns, and the number and arrangement of neurons constituting the intermediate layer are uniquely determined by the program, It is assumed that there is no change in the formation process of the neural network model.

  Each data of the one side data and the other side data includes the intensity information of the signal received by each transmitting antenna 15 as described above, and is assigned a specific score. For each piece of data, learning is performed by inputting strength information to the input layer and inputting a score to the output layer. In the input layer, the number of transmission antennas 15 (six in this embodiment) neurons are arranged, and the intensity information of the transmission antenna 15 corresponding to each neuron is input to each neuron. The score assigned to the input data is input to the output layer.

  In this way, when specific data is input, the initial value of the connection load between neurons is calculated by the error back propagation method. Specifically, a score is calculated by a function such as an initial coupling weight and a sigmoid function, an error from the input score is obtained, and a process of reviewing the coupling weight by an error back propagation learning method is performed. The other data are sequentially input to correct the coupling load. By sequentially inputting each data of the one side data and the other side data to the neural network model, a neural network model for the intensity information inside and outside the vehicle 1 is finally formed. With respect to the neural network model obtained here, parameters such as connection weights necessary for calculation in each neuron are stored in the memory 13, whereby the neural network model is stored in the memory 13. By inputting the strength information actually obtained by the portable device 3 to the input layer of the learned neural network model, an output value (score) according to the position of the portable device 3 in the output layer of the neural network model ) Can be obtained.

  Next, the operation of the keyless entry device will be described. FIG. 6 shows a flowchart of the operation when the door is unlocked. FIG. 7 shows a chart of signals transmitted from the vehicle-side device 2 and the portable device 3 in the flow of FIG. The keyless entry device of the present embodiment is such that when the request switch 16 provided in the vehicle 1 is pressed, wireless communication is performed between the vehicle side device 2 and the portable device 3 and the door is unlocked. is there. Therefore, the flow starts when the user first presses the request switch 16 of the vehicle 1 (S1).

  When the request switch 16 is pressed, the vehicle-side control unit 12 causes the vehicle-side transmission unit 11 to transmit a request signal LF1 (S2). As shown in FIG. 7, the request signal LF1 includes a signal A including a wakeup signal and a command signal CMD. The command signal CMD includes V-ID (Vhicle-ID) information, which is a vehicle-specific identification code.

  When the portable device 3 receives the request signal LF1 from the portable device receiver 20, the portable device controller 22 changes from the sleep state to the normal state by the wake-up signal, and the V-ID included in the request signal LF1 is held by the portable device 3. It is determined whether or not it matches the V-ID. If the V-IDs do not match, the flow ends there. If the V-IDs match, the portable device control unit 22 causes the portable device transmission unit 21 to transmit the answer signal RF1 (S5).

  When the vehicle-side receiver 10 receives the answer signal RF1 (S6), the vehicle-side controller 12 causes the vehicle-side transmitter 11 to transmit a position confirmation signal LF2. As shown in FIG. 7, the position confirmation signal LF2 includes a wake-up signal as with the request signal LF1, and sequentially transmits a signal A including the ID of the portable device, a signal including the command signal CMD, and the transmission antennas 15a to 15f. And a plurality of Rssi measurement signals.

  The Rssi measurement signal transmitted from each of the transmission antennas 15a to 15f is a pulse signal having a predetermined intensity and continuing for a predetermined time as shown in FIG. 6, and the reception intensity is measured on the portable device 3 side. Used to do. Each Rssi measurement signal is transmitted from the transmitting antennas 15a to 15f in a predetermined order and at a predetermined time interval by the vehicle-side transmission unit 11 after a predetermined time has elapsed after receiving the RF1 signal from the portable device. The portable device 3 stores information on which signal from which antenna is transmitted at which timing from reception of the RF1 signal on the vehicle side, and starts reception from the time when the RF1 signal is received. Measure time. Then, by comparing the two, it is possible to identify from which transmitting antenna 15 the Rssi measurement signal is transmitted.

  The position confirmation signal LF2 including the Rssi measurement signal transmitted from each of the transmission antennas 15a to 15f is received by the portable device receiver 20 of the portable device 3 (S8). The portable device control unit 22 measures the strength of each Rssi measurement signal with the triaxial antenna 23 as described above, and uses the strength information for each transmission antenna obtained from the triaxial antenna 23 as the answer signal RF2 for the vehicle side device 2. (S9). At this time, the answer signal RF2 is also transmitted including the HU-ID, which is an ID uniquely set for each portable device. The signal strength measurement is not limited to measuring the strength on the portable device 3 side by transmitting an Rssi measurement signal from the vehicle 1 side, but the strength of the request signal itself transmitted from the vehicle 1 side. You may measure.

  The vehicle side transmitter 11 of the vehicle side device 2 receives the answer signal RF2 from the portable device 3 (S10). When the answer signal RF2 is received, the vehicle-side control unit 12 determines whether or not the HU-ID included therein matches the one registered in the vehicle (S11). Here, if the HU-ID does not match that registered in the vehicle, the flow ends there. On the other hand, if the HU-ID matches that registered in the vehicle, then the position of the portable device 3 is determined (S12).

  At the time of transmission / reception of the request signal LF1, the answer signal RF1 is transmitted after a different time for each portable device 3 after transmitting the request signal LF1, and any one of the plurality of portable devices 3 is measured by measuring this time. The portable device 3 is specified quickly and easily depending on whether there is a response. At the time of transmission / reception of the request signal LF2, accurate authentication using the individual ID of the portable device having a larger amount of information and confirmation of the position are first performed on the portable device 3 detected in the request signal LF1. And when it cannot authenticate, the same operation | movement is performed with respect to each portable device 3. FIG. Note that the identification of the portable device 3 in the request signal LF1 may be omitted and only the authentication of the portable device 3 here may be performed, or the authentication of each portable device 3 may be performed after the transmission of the Rssi measurement signal. it can.

  In S12, when determining the position of the portable device 3 from the strength information actually obtained by the portable device 3, the vehicle-side control unit 12 inputs the strength information to the input layer of the neural network model stored in the memory 13, Get the output value in the output layer. The output value is determined based on a predetermined threshold value, and it is determined whether the portable device 3 is inside or outside the vehicle. In the present embodiment, the threshold value is set to 0 by learning by assigning a score to the one side data and the other side data as described above. That is, when the actual intensity information is input, it is determined that the vehicle is out of the vehicle when the output value is 0 or more, and the vehicle is inside when the output value is smaller than 0.

  Thereafter, the vehicle-side controller 12 performs different control depending on whether the portable device 3 is inside the vehicle 1 or outside the vehicle 1 (S13). When it is determined that the position of the portable device 3 is not outside the vehicle 1, that is, the portable device 3 is inside the vehicle 1, the flow is finished as it is.

  When the request switch 16 is pressed to unlock the door, the portable device 3 should be outside the vehicle 1, and if the door is unlocked when the portable device 3 is inside the vehicle 1 together with the user, Even a person who does not have the machine 3 can push the request switch 16 to unlock the door. In order to prevent this, when the portable device 3 is in the vehicle 1, the door is not unlocked. On the other hand, when it is determined that the position of the portable device 3 is outside the vehicle 1, an unlock command signal is output to the door locking device (not shown) to unlock the door (S14).

  Here, the operation of pressing the request switch 16 to unlock the door is shown, but the operation of locking the door can be similarly determined by determining the position of the portable device 3 and performing control according to the result. Further, not only the door locking / unlocking operation, but also the operation of starting the engine according to the position of the portable device 3, the position of the portable device 3 is similarly determined, and the operation is performed according to the result. be able to.

  As mentioned above, although embodiment of this invention was described, application of this invention is not restricted to these embodiment, It can apply variously within the range of the technical idea. For example, in the embodiments described so far, as a method for specifying a transmitting antenna, an Rssi measurement signal is transmitted from each transmitting antenna in a predetermined order and at a predetermined time interval, and the portable device measures which reception time by measuring. Although it is determined whether it is a transmission antenna, Rssi1 to 6 is transmitted with identification information of each transmission antenna, or after receiving Rssi with a portable device, the strength data is immediately returned to the vehicle side, and the vehicle side It is also possible to use a method such as identifying with. In this embodiment, as shown in FIG. 4, three transmitting antennas 15 are provided inside and outside the vehicle 1, but the number and arrangement of the transmitting antennas 15 are not limited to this, and two in total in the vehicle 1. That's all you need. However, the position of the plurality of transmission antennas 15 can be determined with higher accuracy.

  Further, the predetermined boundary surface for determining the position of the portable device 3 is not limited to the body of the vehicle 1, and may be a vehicle inner surface or a vehicle outer surface based on the vehicle 1. For example, the inside surface of the vehicle 10 cm from the body of the vehicle 1 may be a predetermined boundary surface, and the inside / outside determination may be performed with reference to the boundary surface. The predetermined boundary surface may be used for discrimination when realizing the function of turning on the light in the vehicle 1 when the person carrying the portable device 3 approaches the vehicle 1 to a point of 1.5 m. Furthermore, in order to determine whether or not the person carrying the portable device 3 in the vehicle is in the driver's seat, a predetermined boundary surface is set between the driver's seat and the adjacent seat.

  Further, in the present embodiment, the strength information is transmitted from the portable device 3 to the vehicle 1 side, and the vehicle-side control unit 12 performs position determination using the neural network model, but the neural network model is stored in the memory 24 of the portable device 3. May be stored, and after the position is determined by the portable device control unit 22, the information may be transmitted to the vehicle 1 side.

  In the present embodiment, the vehicle-side device 2 is provided with a plurality of transmission antennas 15 and the portable device 3 measures the strengths of the plurality of Rssi measurement signals, and the position of the portable device 3 is determined based on the measured strength. The vehicle-side device 2 is provided with a plurality of receiving antennas 14, signals from the portable device 3 are received by the plurality of receiving antennas 14, and the strength is measured. It is also possible to perform position determination. At this time, the signal from the portable device 3 includes an intensity measurement signal as well as the answer signal. Further, in this case, the one side data for learning the neural network model is obtained when a plurality of receiving antennas 14 receive signals transmitted from the portable device 3 when the portable device 3 is placed outside the vehicle 1. It has a lot of obtained intensity information, and the other side data is obtained by receiving signals transmitted from the portable device 3 by the plurality of receiving antennas 14 when the portable device 3 is placed inside the vehicle 1. It has a lot of strength information. The point that the position of the portable device 3 is determined from the output obtained by learning the neural network model based on these data and actually inputting the intensity information obtained by the receiving antenna 14 into the neural network model. It is the same.

It is a schematic diagram of the keyless entry device in this embodiment. It is a block diagram of a keyless entry device. It is the figure which showed the position of the antenna provided in a vehicle. It is a general | schematic top view showing acquisition of the data in the periphery of a vehicle. It is the schematic of a neural network model. It is a flowchart in the case of unlocking operation. It is a chart figure of the signal from a vehicle side apparatus and a portable machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Vehicle side apparatus 3 Portable machine 10 Vehicle side receiving part 11 Vehicle side transmission part 12 Vehicle side control part 13 Memory 14 Reception antenna 15 Transmission antenna 16 Request switch 20 Portable machine receiving part 21 Portable machine transmission part 22 Portable machine control part 23 Triaxial antenna

Claims (2)

A vehicle-side device including a vehicle-side transmitter having a plurality of transmission antennas provided in the vehicle and transmitting a request signal, a vehicle-side receiver that receives an answer signal, and a portable device receiver that receives the request signal In a keyless entry device having a portable device equipped with a portable device transmitter for transmitting an answer signal,
The vehicle-side device includes a vehicle-side control unit that performs predetermined control when an answer signal from the portable device is authenticated, and the portable device detects each intensity of a signal transmitted from a plurality of transmission antennas of the vehicle-side device. A portable device control unit,
The vehicle-side control unit or portable device control unit includes a memory for storing data,
In the memory, the portable device receives signals transmitted from the plurality of transmission antennas when the portable device is positioned along one side of a predetermined boundary surface with respect to the vehicle. When the portable device is positioned along the other side of the predetermined boundary surface with respect to the vehicle, the plurality of intensity information is transmitted from the plurality of transmission antennas. A neural network model created from the one side data and the other side data is stored as a plurality of intensity information obtained by receiving the signal to be received by the portable device as the other side data of the predetermined boundary surface,
The vehicle-side control unit or the portable device control unit provided with the memory is configured so that the portable device is based on the output obtained by inputting the intensity information actually obtained by the portable device to the neural network model stored in the memory. A keyless entry device for determining which side of the predetermined boundary surface is present. A vehicle-side device that is provided in a vehicle and that includes a vehicle-side transmitter that transmits a request signal, a vehicle-side receiver that includes a plurality of reception antennas that receive an answer signal, and a portable device receiver that receives the request signal In a keyless entry device having a portable device equipped with a portable device transmitter for transmitting an answer signal,
The vehicle-side device includes a vehicle-side control unit that performs predetermined control when an answer signal from the portable device is authenticated, and the vehicle-side control unit receives signals transmitted from the portable device received by the plurality of receiving antennas. Each intensity can be detected,
The vehicle-side control unit includes a memory for storing data,
In the memory, when the portable device is positioned along one side of a predetermined boundary surface with respect to the vehicle, the plurality of receiving antennas receive signals transmitted from the portable device. A signal transmitted from the portable device when the portable device is positioned along the other side of the predetermined boundary surface with respect to the vehicle, using the plurality of intensity information as data on one side of the predetermined boundary surface. A plurality of intensity information obtained by receiving the plurality of receiving antennas as the other side data of the predetermined boundary surface, a neural network model created from the one side data and the other side data is stored,
The vehicle-side control unit is configured so that the portable device is connected to any one of the predetermined boundary surfaces based on an output obtained by inputting the intensity information actually obtained by the vehicle-side device to the neural network model stored in the memory. A keyless entry device characterized in that it is present on the side.

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