JP6416047B2 - Remote control system - Google Patents

Description

  The present invention relates to a remote operation system.

  Conventionally, when a movement of a portable device is detected by an acceleration sensor and the detected value of the acceleration sensor reaches a determination threshold value, an affirmative determination is made that there is a specific operation stored in advance in the portable device, and the portable device is transferred to the vehicle. There has been proposed a remote operation system that outputs an operation completion and remotely operates the in-vehicle device in response to the output. For example, in the system of Patent Document 1, the swing operation of the portable device is reflected in the open / close control of the slide door.

JP2011-903A

  When the user swings the portable device, other operations may be added to the portable device in addition to the swing operation in one direction, such as rotating the portable device. That is, the attitude of the portable device changes. When the attitude of the portable device changes, the direction in which the swing operation is performed in the portable device changes, and thus there is a possibility that the in-vehicle device that the user wants to remotely operate may operate differently from the user's intention. In addition, there is a possibility that the in-vehicle device that operates is different or the in-vehicle device itself does not operate.

  The present invention has been made in view of these problems, and an object of the present invention is to provide a remote operation system with good operability.

  In order to solve the above-described problem, a remote operation for remotely operating a control target on the condition that a motion of a mobile device is detected by a motion sensor and a detection value of the motion sensor is a value indicating a specific operation in the mobile device. The system includes a signal strength detection unit that detects a signal strength of a radio signal exchanged between the portable device and the control target, and one of the portable device and the control target is when the specific operation is performed. A plurality of detection logics for determining whether or not the movement of the portable device corresponds to the specific operation according to the attitude of the portable device, and according to the detection result of the signal intensity detection unit; The gist is to employ any of the determination results of the plurality of detection logics.

  While the portable device is specifically operated, the posture of the portable device is not always constant. If the attitude of the portable device changes, the detection value of the motion sensor changes even if the movement is the same. Therefore, according to this system, the attitude of the portable device is determined from the detection result of the signal strength detection unit, and the determination result of the detection logic corresponding to the attitude of the portable device is adopted. Therefore, regardless of the attitude of the portable device, it is possible to remotely operate the control target by performing a specific operation of the portable device, so that the operability as a system is good.

  In the above system, the specific operation is an operation of linearly moving the portable device, and the plurality of detection logics include the first detection logic and the portable device corresponding to a case where the posture of the portable device does not change. It is preferable that the second detection logic corresponding to the case where the posture is rotated is included.

According to this system, the object to be controlled can be remotely operated suitably by moving the portable device linearly.
In the above system, the portable device has a three-axis antenna that is used for wireless communication with the control target and is orthogonal to each other, and the signal strength detection unit detects a signal strength at each of the three-axis antennas. It is preferable to do.

  According to this system, the detection accuracy of the change in the attitude of the portable device is increased. As a result, the controlled object can be suitably remotely operated.

  The system of the present invention has an effect that operability is good.

(A) is a block diagram which shows schematic structure of a remote control system, (b) is an image figure of an antenna. The related figure which shows each change of the acceleration in the knee bending operation without rotation of a portable machine, the position of an antenna, and RSSI. The related figure which shows each change of the acceleration in the knee bending operation with rotation of a portable machine, the position of an antenna, and RSSI.

Hereinafter, an embodiment of a remote control system will be described with reference to the drawings.
As shown in FIG. 1 (a), the remote control system 1 is capable of bidirectional wireless communication between the portable device 2 and the vehicle 3, and unidirectional wireless communication with the portable device 2 as a transmission side. Is possible. For bidirectional wireless communication, LF (low frequency) band radio waves and UHF (ultrahigh frequency) band radio waves are used, and for unidirectional wireless communication, UHF band radio waves are used.

The portable device 2 includes an LF reception circuit 21, a microcomputer 22, a UHF transmission circuit 23, and an acceleration sensor 24.
The LF receiving circuit 21 can receive a request signal transmitted from the vehicle 3 as an LF band radio wave. In addition, the LF reception circuit 21 is provided with an RSSI circuit 21 a that detects the signal strength (RSSI) of the request signal. When receiving the request signal, the LF receiving circuit 21 demodulates the signal. In addition, information indicating the signal strength (RSSI) of the request signal is output to the microcomputer 22. As shown in FIG. 1B, the LF reception circuit 21 includes three antennas 21x, 21y, and 21z whose reception antennas are orthogonal to each other, and the RSSI circuit 21a includes the respective antennas 21x, 21y, and 21z. The signal strength of the request signal received at is detected. The RSSI circuit 21a constitutes a signal intensity detection unit.

  As shown in FIG. 1A, the acceleration sensor 24 is a medium for detecting acceleration applied to the portable device 2, and outputs a detected acceleration value to the microcomputer 22. The acceleration sensor 24 is a three-axis sensor having three detection axes.

  A non-volatile memory 22 a provided in the microcomputer 22 stores an ID (identification) unique to the portable device 2. The memory 22a stores detection logic for determining whether or not a specific operation, here, a knee bending operation is performed. That is, in the memory 22a, the first detection logic 25 for determining the presence or absence of a knee bending operation when the portable device 2 does not include rotation, and the presence or absence of a knee bending operation when the portable device 2 includes rotation. The second detection logic 26 for determining is stored. The first detection logic 25 corresponds to a case where the posture of the portable device 2 does not change, and is a logic that determines the presence or absence of a knee bending operation using the detection value of the acceleration sensor 24 as it is. The second detection logic 26 corresponds to the case where the posture of the portable device 2 changes, here, the case where the portable device 2 rotates, and the detected value of the acceleration sensor 24 is corrected in accordance with the rotation of the portable device 2 to bend the knee. This is logic for determining whether or not there is an operation.

When receiving the request signal, the microcomputer 22 generates a response signal including an ID as a response to the request signal.
Further, while receiving the request signal, the microcomputer 22 constantly monitors the detection value of the RSSI circuit 21a and the detection value of the acceleration sensor 24, and uses the first detection logic 25 and the second detection logic 26. Judge whether or not knee bending is performed. When the change in the detected value of the RSSI circuit 21a is equal to or less than a preset reference value, the microcomputer 22 uses the determination result using the first detection logic 25, and the change in the detected value of the RSSI circuit 21a is the reference. When the value is exceeded, the determination result using the second detection logic 26 is used.

  When the microcomputer 22 determines that there is a knee bending operation, the microcomputer 22 generates a specific operation signal including information requesting opening / closing of the sliding door and the ID. The specific operation signal is modulated into a UHF band radio wave by the UHF transmission circuit 23 and transmitted to the outside of the portable device 2.

  The vehicle 3 includes an LF transmitter 31, a UHF receiver 32, a verification ECU (Electronic Control Unit) 33, and a slide door 34. The LF transmitter 31 is controlled by the verification ECU 33 and transmits a request signal to a communication area set around each door (including the driver's seat door and the slide door 34). When the portable device 2 enters the communication area, a response signal is returned from the portable device 2 in response to a request signal. The UHF receiver 32 can receive a specific operation signal in addition to the response signal from the portable device 2.

  The verification ECU 33 includes a non-volatile memory 33a. In the memory 33a, the ID of the portable device 2 suitable for the vehicle 3 is registered. In order to monitor the approach of the portable device 2, the verification ECU 33 periodically generates a request signal and transmits the request signal from the LF transmitter 31. When the verification ECU 33 receives the response signal through the UHF receiver 32 along with the transmission of the request signal, the verification ECU 33 verifies the ID included in the signal.

  In addition, when receiving the specific operation signal, the verification ECU 33 performs verification of the ID included in the signal, and when the verification is established, opens and closes the slide door 34 through control of an actuator (not shown).

  Next, the knee bending operation will be described with reference to FIGS. For easy understanding, the three-axis antenna provided in the LF receiving circuit 21 displays only two axes x and y, and the three detection axes of the acceleration sensor 24 display only two axes x and y.

  When the user performs a knee bending operation, the displacement of the portable device 2 varies depending on the position where the portable device 2 is carried. That is, the displacement of the portable device 2 is divided into a case where the mobile device 2 reciprocates linearly without rotating and a case where the mobile device 2 reciprocates while rotating.

  As shown in FIG. 2, for example, when the portable device 2 is carried by the user in a state of being placed in the user's breast pocket, the upper body only displaces up and down when the user performs a knee bending operation. In this case, since the posture of the portable device 2 does not change (rotates) from before knee bending to during knee bending (timing when bending and stretching is switched) and immediately after knee bending (when the knee is fully extended), the RSSI circuit 21a The detection axis and the detection axis of the acceleration sensor 24 also do not change (rotate). Therefore, the detected RSSI value is small in both the antennas 21x and 21y.

  Further, the detected acceleration value changes greatly in a specific direction (here, the Y-axis direction). This is because there is a moment when the motion acceleration M acts in the same direction as the gravitational acceleration G (during knee bending) and a moment when it acts in the opposite direction (just after knee bending).

  On the other hand, as shown in FIG. 3, for example, when the user carries the knee bending operation when the portable device 2 is carried in a trouser pocket provided along the thigh of the user, The thigh is displaced up and down while rotating around the knee. That is, since the portable device 2 rotates from before knee bending to during knee bending and immediately after knee bending to immediately after knee bending, the detection axis of the RSSI circuit 21a and the detection axis of the acceleration sensor 24 also rotate. Therefore, the detected RSSI value changes greatly in both the antennas 21x and 21y.

  Further, since the portable device 2 rotates, acceleration is detected only on the Y axis before and after knee bending, but acceleration is also detected on the X axis in addition to the Y axis during knee bending. That is, when the portable device 2 rotates, the detected acceleration value is less likely to change greatly in a specific direction as compared to the case where the portable device 2 does not rotate.

Next, the operation of the remote operation system 1 will be described.
While receiving the request signal, the microcomputer 22 constantly monitors the detection value of the RSSI circuit 21 a and the detection value of the acceleration sensor 24, and uses each of the first detection logic 25 and the second detection logic 26. The determination result is obtained, and finally, which detection result is used is determined. In this way, the determination is not started after all the detected values are gathered, but the judgment result is selected when all the detected values are gathered, so that the knee bending action is judged from the completion of the knee bending action of the user. It takes a short time. As a result, the time until the sliding door 34 opens and closes is short.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The microcomputer 22 includes respective logics of the first detection logic 25 corresponding to the case where the posture of the portable device 2 does not change and the second detection logic 26 corresponding to the case where the posture of the portable device 2 rotates. It is used to determine the presence or absence of a knee bending operation and to select which logic determination result to use from the detection value of the RSSI circuit 21a.

  Thereby, even when the posture of the portable device 2 changes (rotates) or does not change (rotates) depending on the possession position as in the knee bending operation, the knee bending operation can be correctly determined. Therefore, regardless of the position that the portable device 2 has, the user can operate a specific control target (here, the slide door 34) by performing a specific operation.

  (2) Since the determination result is selected, it takes a short time to determine the knee bending operation after the user's knee bending operation is completed. As a result, the time until the sliding door 34 opens and closes is short.

  (3) The RSSI circuit 21a and the acceleration sensor 24 are configured to be conventionally provided in the portable device 2. In other words, since it can be handled only by updating the software of the microcomputer 22, it can be easily applied to a conventional remote operation system. It is also effective for cost.

  (4) The LF receiving circuit 21 is provided with triaxial antennas 21x, 21y, and 21z orthogonal to each other. The RSSI circuit 21a detects the signal strength received by each of the triaxial antennas 21x, 21y, and 21z. Thereby, the detection accuracy of the change in the posture of the portable device 2 is increased.

In addition, you may change the said embodiment as follows.
In the above embodiment, the case where the specific operation is the knee bending operation has been described, but other operations such as a swing operation can be applied.

  -In above-mentioned embodiment, when the sliding door 34 is opened and closed through knee bending operation, it is preferable to alert | report by the alerting | reporting part provided in the vehicle 3 or the portable device 2, for example, a buzzer, a blinker, a display. If notified, it is easy to recognize that the specific operation has been suitably performed. Further, even when a specific operation is performed unintentionally, it is easy to recognize this.

In the above embodiment, the RSSI circuit 21a is a three-axis sensor having three detection axes. However, the RSSI circuit 21a can be applied even if the number of detection axes is one or two.
In the above-described embodiment, the acceleration sensor 24 is a three-axis sensor having three detection axes. However, the present invention can be applied even when the number of detection axes is one or two.

  In the above embodiment, the operation target is not limited to the sliding door. Other configurations such as vehicle door lock / unlock switching may be used. Further, the operation target such as switching of lock and unlock of the door for a house is not limited to the configuration of the vehicle.

In the above embodiment, the portable device 2 is not limited to a vehicle-dedicated electronic key, and may be a portable terminal such as a smartphone.
-In the said embodiment, the radio | wireless communication performed between the portable device 2 and the vehicle 3 is not restricted to the signal of the band of LF band and UHF band, You may use the signal of another band.

DESCRIPTION OF SYMBOLS 1 ... Remote operation system, 2 ... Portable machine, 3 ... Vehicle, 21 ... LF reception circuit, 21a ... RSSI circuit, 21x, 21y, 21z ... Antenna, 22 ... Microcomputer, 22a ... Memory, 23 ... UHF transmission circuit, 24 ... Acceleration sensor, 25 ... first detection logic, 26 ... second detection logic, 31 ... LF transmitter, 32 ... UHF receiver, 33 ... verification ECU, 33a ... memory, 34 ... sliding door.

Claims (3)

In a remote operation system for remotely operating a control object on the condition that the motion of the mobile device is detected by a motion sensor and the detection value of the motion sensor is a value indicating a specific operation in the mobile device,
A signal strength detection unit that detects a signal strength of a radio signal transmitted and received between the portable device and the control target;
One of the portable device and the control target is a plurality for determining whether or not the movement of the portable device is a movement corresponding to the specific operation according to the posture of the portable device when the specific operation is performed. A remote operation system that employs a determination result of any of the plurality of detection logics according to a detection result of the signal intensity detection unit. The remote control system according to claim 1, wherein
The specific operation is an operation of linearly moving the portable device,
The remote operation system in which the plurality of detection logics include a first detection logic corresponding to a case where the posture of the portable device does not change and a second detection logic corresponding to a case where the posture of the portable device is rotated. The remote control system according to claim 1 or 2,
The portable device has a three-axis antenna used for wireless communication with the control target and orthogonal to each other,
The signal strength detection unit is a remote control system that detects signal strength in each of the three-axis antennas.