JP2010223052A - On-vehicle machine and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle machine capable of certainly transmitting a vehicle control result to a portable unit with less power consumption. <P>SOLUTION: The on-vehicle machine to control a vehicle in conformity to the wireless communication exchanged with the portable unit includes a wireless communication part to receive signals from the portable unit and a control unit to execute an intensity sensing process to sense the intensity of the signal received by the wireless communication part, a vehicle control process to control the vehicle in conformity to the signal received by the communication part, and a communication control process to control the wireless communication part so that the signal expressing the results of controlling the vehicle by the vehicle control process is returned to the portable unit with the intensity according to the intensity of the signal sensed by the intensity sensing process. Accordingly the control result is transmitted with the intensity according to the intensity of the signal received from the portable unit, and it is possible to certainly transmit the results of controlling the vehicle to the portable unit with a less power consumption. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle device and a control method for controlling a vehicle according to wireless communication performed with a portable device.

  In recent years, for example, an in-vehicle device that can be controlled to start an engine or the like according to a command transmitted from a portable device carried by a vehicle driver or the like using radio waves has been known.

Moreover, even if communication with other wireless communication systems interferes, a portable device capable of performing highly reliable communication with an in-vehicle device has been known (for example, Patent Document 1).
This portable device has means for detecting the strength of the received signal received from the vehicle-mounted device, and interference that prevents reception of the signal if reception fails even though the detected received signal strength is sufficient for reception. A response signal in response to the received signal is transmitted after waiting until the intensity of the radio wave becomes lower than the intensity of the received signal.

Furthermore, a portable transmitter that can reliably communicate wirelessly with the vehicle-mounted device even when the communication state is bad or the battery is exhausted has been known (for example, Patent Document 2).
The transmitter includes means for detecting the depth of key operation and means for amplifying the signal so that the output intensity of the radio wave transmitted to the in-vehicle device is sequentially increased according to the detected depth of key operation.

JP 2007-191870 A JP 2001-279971 A

  Here, since the operating distance between the in-vehicle device and the portable device is further increased, it is necessary to display the control result by the in-vehicle device such as the engine to the driver who operates the portable device in a remote place away from the vehicle. It was. For this reason, in-vehicle devices not only receive commands from portable devices, but also need to reliably transmit control results to portable devices at remote locations and consume power required to transmit control results to remote locations. The problem was that the amount increased.

In addition, in the portable device described in Patent Document 1, even when the intensity of the jamming radio wave is lower than the intensity of the received signal, there is a case where the radio wave cannot be transmitted with a strength that can reliably communicate with the in-vehicle device.
Furthermore, since the portable transmitter described in Patent Document 2 may communicate with an output intensity exceeding the intensity sufficient to communicate with the in-vehicle apparatus, the battery accumulates more power than necessary. There was a problem that it might end. On the other hand, when the key operation is shallow even when sufficient power is supplied, there is a problem in that a signal may not be output with a strength capable of reliably communicating with the in-vehicle device.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-vehicle device and a control method that can reliably transmit the control result of the vehicle to the portable device with low power consumption. is there.

An in-vehicle device according to the present invention is an in-vehicle device that controls a vehicle in accordance with wireless communication performed with a portable device, the wireless communication unit that receives a signal from the portable device, and the intensity of the signal received by the wireless communication unit. Intensity detection processing to be detected, vehicle control processing for controlling the vehicle according to the signal received by the wireless communication unit, and a signal representing a control result of controlling the vehicle in the vehicle control processing according to the strength of the signal detected in the strength detection processing And a control unit that executes a communication control process for controlling the wireless communication unit so as to send a reply to the portable device with high strength.
According to this configuration, since the control result is transmitted with the strength corresponding to the strength of the signal received from the portable device, the vehicle control result can be reliably transmitted to the portable device with low power consumption.

In the above configuration, the vehicle control process controls the start of the engine mounted on the vehicle according to the signal received by the wireless communication unit, and the wireless communication unit carries the engine control result using the power supplied by the storage battery. The control unit returns whether or not the generator that generates power by the rotation of the engine started in the vehicle control process generates power supplied to any one or more of the storage battery and the wireless communication unit. The power generation determination process is further executed, and when the communication control process determines that the generator is generating power in the power generation determination process, the wireless communication is performed so that the control result is returned with a stronger intensity than when it is determined that the power generation is not performed. A configuration for controlling the communication unit can be employed.
According to this configuration, since the control result is transmitted with the strength corresponding to the supplied power, the control result can be reliably transmitted to the portable device while preventing the storage battery from being consumed.

A control method according to the present invention is a control method for controlling a vehicle according to wireless communication performed with a portable device, wherein the wireless communication unit receives a signal from the portable device, and the wireless communication step receives the signal at the wireless communication step. An intensity detection step for detecting the intensity of the signal, a vehicle control step for controlling the vehicle according to the signal received in the wireless communication step, and a signal indicating the control result obtained by controlling the vehicle in the vehicle control step in the intensity detection step And a communication control step for controlling the wireless communication unit so as to send a reply to the portable device with a strength corresponding to the strength of the mobile phone.
According to this configuration, in order to control to transmit the control result at an intensity corresponding to the intensity of the signal received from the portable device, the communication unit is configured to reliably transmit the vehicle control result to the portable device with low power consumption. Can be controlled.

  According to the in-vehicle device and the control method disclosed in the present specification, the control result of the vehicle can be reliably transmitted to the portable device with low power consumption.

It is a block diagram which shows one Embodiment of a control system provided with the vehicle equipment of this invention, and the vehicle which an vehicle equipment controls. It is a flowchart showing an example of the control processing which the control part with which a portable machine is provided performs. It is a hardware block diagram showing the example of 1 structure of vehicles. It is a functional block diagram showing the example of 1 structure of the control part with which a vehicle equipment is provided. It is a part of flowchart showing an example of the control processing which the control part with which a vehicle equipment is provided. It is the other part of the flowchart showing an example of the control process which the control part of vehicle equipment performs.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.

FIG. 1 is a configuration diagram showing an embodiment of a control system including an in-vehicle device and a portable device according to the present invention.
A control system 1 illustrated in FIG. 1A includes a portable device 100 and a vehicle 200 that the portable device 100 controls using wireless communication. The portable device 100 is carried by an occupant of the vehicle 200. In this embodiment, the vehicle 200 includes not only automobiles such as passenger cars, buses, and trucks, but also motorbikes, light vehicles, military vehicles such as trolley buses and tanks, and railway vehicles. The control system 1 may be used not only for vehicles but also for spacecraft such as ships, airplanes, and artificial satellites.

Here, with reference to FIG.1 (b), the external appearance structure of the portable device 100 is demonstrated. FIG. 1B is a top view illustrating the portable device 100 from the top.
The portable device 100 includes a display unit 110 and an operation unit 120. Display unit 110 displays the state of vehicle 200. Specifically, the display unit 110 includes LEDs 110O (Light Emitting Diodes), 110G, and LEDs 110R that light up in amber, green, and red, respectively. The display unit 110 displays the state of the vehicle by the lighting pattern of these three LEDs. More specifically, the red LED 110R is lit when the vehicle 200 is in an abnormal state such as theft or intrusion, or the removal of an object or the presence of a moving object is detected. Further, the green LED 110G is lit when the vehicle 200 is in a state of operating according to the control of the portable device 100, for example. Further, the amber LED 110O is lit when the state of the vehicle 200 is unknown.
The display unit 110 may be configured by an LCD (Liquid Crystal Display), for example. In addition, the portable device 100 may include a sound output device such as a speaker instead of the display unit 110, and may output a notification sound that is predetermined according to the state of the vehicle.

  The operation unit 120 receives a control of the occupant of the vehicle 200 and inputs a control command for instructing control of the vehicle. That is, the user operates the operation unit 120 when causing the vehicle to execute desired control. Specifically, the operation unit 120 includes a lock button 121, an unlock button 122, an engine start button 123, an engine stop button 124, and a monitoring mode button 125. The lock button 121 and the unlock button 122 input a door lock control command and a door unlock control command for commanding to lock and unlock the door of the vehicle 200, respectively. The engine start button 123 and the engine stop button 124 are input with an engine start control command and an engine stop control command for instructing to perform control for starting the engine of the vehicle 200 and control for stopping the engine. The monitoring mode button 125 inputs a monitoring start command and a monitoring end command for instructing to start and end monitoring of the safety-related state of the vehicle 200.

Next, the configuration of the portable device 100 will be described with reference to FIG. FIG. 1C is a hardware configuration diagram illustrating a configuration example of the portable device 100.
The portable device 100 includes not only the control unit 130 and the wireless communication unit 140 but also the display unit 110 and the operation unit 120 that have already been described with reference to FIG. The controller 130 will be described later.

The wireless communication unit 140 includes, for example, an antenna and a transmission / reception circuit. The antenna outputs a current generated by receiving a predetermined wave transmitted from the vehicle 200 to the transmission / reception circuit. In the present embodiment, the wave is described as a radio wave. However, the present invention is not limited to this, and any one of light, electromagnetic waves, infrared rays, ultrasonic waves, and sound can be adopted. Conversely, the antenna emits a wave to the vehicle 200 based on the current output by the transmission / reception circuit.
The transmission / reception circuit includes, for example, a low frequency amplifier circuit such as an AF (Audio Frequency) circuit and a high frequency amplifier circuit such as an RF (Radio Frequency) circuit. The transmission / reception circuit outputs a signal current output from the antenna to the control unit 130. Conversely, the signal current output by the control unit 130 is output to the wireless communication unit 140.

  The control unit 130 is constituted by, for example, a microcomputer (hereinafter simply referred to as a microcomputer). The control unit 130 controls the vehicle 200 by executing a control process, which is a software process, using power supplied from a battery (not shown). The control unit 130 includes an execution unit 130a, a storage unit 130b, and an input / output unit 130d. The execution unit 130a, the storage unit 130b, and the input / output unit 130d are connected to each other via a bus 130f so that information can be exchanged. The execution part 130a is comprised by CPU (Central Processing Unit), for example. The storage unit 130b is configured by, for example, a ROM (Read-Only Memory) or a RAM (Random Access Memory). The input / output unit 130d is composed of, for example, an A / D (Analog / Digital) converter.

The software processing is realized by the execution unit 130a reading the program stored in the storage unit 130b and performing calculations according to the execution procedure of the software processing represented by the read program. Information indicating the result of the calculation performed by the execution unit 130a is written in the storage unit 130b. In addition, the input / output unit 130d, if necessary, outputs information to be input / output to / from the connected display unit 110, the operation unit 120, and the wireless communication unit 140 as information to be executed by the execution unit 130a or a calculation result. Input / output as information indicating.

Next, a control process executed by the control unit 130 will be described with reference to FIG. FIG. 2 is a flowchart illustrating an example of a control process executed by the control unit 130. The control unit 130 executes control processing at the time of activation.
First, the control unit 130 determines whether or not the power supply is turned “OFF” because, for example, a battery (not shown) is removed or the power stored in the battery is depleted (step S01). The control unit 130 ends the execution of the control process when determining that the power supply is “OFF”, and executes the process of step S02 otherwise.

  If it is determined in step S01 that the power is not turned off, the control unit 130 determines whether or not the buttons 121 to 125 are operated (step S02). If it is determined that any of the buttons 121 to 125 has been operated, the control unit 130 executes the process of step S03, and otherwise returns to step S01 and repeats the above process.

  In step S02, when it is determined that any of the buttons 121 to 125 is operated, the control unit 130 controls the wireless communication unit 140 to transmit a signal corresponding to the buttons 121 to 125 to the vehicle 200 (step S02). S03). Specifically, when the button 121 is operated, the wireless communication unit 140 is controlled to transmit a signal representing a door lock control command. Similarly, when the buttons 122 to 125 are operated, control is performed to transmit a door unlock control command, an engine start control command, an engine stop control command, a monitoring start command, and a monitoring end command, respectively.

  Next, the control unit 130 controls the wireless communication unit 140 to receive a signal from the vehicle 200 (step S04). Thereafter, control unit 130 determines whether or not a signal has been received from vehicle 200 (step S05). The control unit 130 executes the process of step S07 when determining that the signal has been received, and executes the process of step S06 when determining that the signal has not been received.

  When determining in step S05 that the signal has not been received, the control unit 130 determines whether or not a predetermined time has elapsed (step S06). If it is determined that the predetermined time has elapsed, the control unit 130 executes the process of step S07. If not, the control unit 130 returns to step S04 and repeats the above process.

  When determining in step S05 that the signal has been received, the control unit 130 controls the display unit 110 to display the state of the vehicle represented by the received signal (step S07). Specifically, control unit 130 lights red LED 110 </ b> R when the received signal reports an abnormality of vehicle 200. Moreover, the control part 130 makes green LED110G light, when a received signal reports that the vehicle 200 exists in the state controlled according to the transmitted control command. Furthermore, when it is determined in step S06 that the signal cannot be received even after a predetermined time has elapsed, the control unit 130 turns on the amber LED 110O. Thereafter, the control unit 130 returns to step S01 and repeats the above processing.

Next, the configuration of the vehicle 200 controlled by the portable device 100 will be described with reference to FIG. FIG. 3 is a hardware configuration diagram illustrating a configuration example of the vehicle 200.
The vehicle 200 includes an in-vehicle device 210, an engine control device 221, a body control device 222, a power management device 223, an engine 231, a generator 232, a storage battery 233, and a door 235.

  The in-vehicle device 210 will be described later. The engine control device 221, the body control device 222, and the power management device 223 (hereinafter referred to as the engine control device 221 or the like) are configured by an ECU (Electronic control unit), for example. The engine control device 221 is controlled by the vehicle-mounted device 210 to control starting and stopping of the engine 231. Specifically, the engine control device 221 uses an electric power supplied from the storage battery 233 to drive a starter (not shown) and controls the fuel injection timing of an injector (not shown) to the engine 231 to control the engine 231. Start. For example, the engine control device 221 acquires a control result of the engine 231 based on an output from the rotation speed sensor, and transmits a signal representing the acquired control result to the in-vehicle device 210 and the power management device 223.

  The body control device 222 is controlled by the in-vehicle device 210 to control opening / closing of the door 235 and the like. The body control device 222 uses the electric power supplied from the storage battery 233 to acquire the control result of the door 235 based on the output from the door sensor, for example, and transmits a signal representing the acquired control result to the in-vehicle device 210. To do.

  The power management device 223 is mainly mounted on a hybrid vehicle. The power management device 223 controls the amount of power charged in the storage battery 233 and the amount of power charged from the storage battery 233 using the power supplied by the storage battery 233. As a specific example, when the charge amount of the storage battery 233 falls below a predetermined value, when the vehicle-mounted device 210 starts the engine 231, the generator 232 is controlled to generate power using the torque generated by the engine 231. To do. When the rotational speed of the engine 231 exceeds a predetermined value, the engine 231 is controlled to stop, and the generator 232 is controlled to function as a motor that generates torque using the electric power accumulated in the storage battery 233. For example, the power management device 223 acquires the control result of the generator 232 based on the output from the current sensor, and transmits a signal representing the acquired control result to the in-vehicle device 210.

  The engine 231 is composed of, for example, a reciprocating engine or a rotary engine. The generator 232 is constituted by an alternator, for example. The generator 232 is controlled by the power management device 132 to generate electric power. The power generator 232 supplies the generated power to the in-vehicle device 210 and the engine control device 221 and the like, and the power not consumed by the in-vehicle device 210 and the engine control device 221 and the like is configured by, for example, a lead storage battery. The storage battery 233 is charged.

The in-vehicle device 210 controls the vehicle 200 according to wireless communication performed with the portable device 100 using the power supplied from the storage battery 233.
Here, the hardware configuration of the vehicle-mounted device 210 will be described with reference to FIG. FIG. 3B is a hardware configuration diagram illustrating a configuration example of the in-vehicle device 210.
The in-vehicle device 210 includes a control unit 211 and a wireless communication unit 212. The control unit 211 executes a control process that is a software process, and controls the vehicle 200 according to a signal received by the wireless communication unit 212. The control unit 211 includes an execution unit 211a, a storage unit 211b, a wired communication unit 211c, and an input / output unit 211d. The execution unit 211a, the storage unit 211b, and the input / output unit 211d are the same as the execution unit 130a, the storage unit 130b, and the input / output unit 130d described with reference to FIG.

  The wired communication unit 211c is configured by, for example, a CAN (Controller Area Network) controller or a LIN (Local Interconnect Network) controller. The wired communication unit 211c communicates with the engine control device 221 and the like connected by wire using a CAN or LIN protocol. The wired communication unit 211c inputs and outputs information that communicates with the engine control device 221 and the like as information that the execution unit 130a calculates or information that indicates a calculation result.

  The wireless communication unit 212 is the same as the wireless communication unit 140 described with reference to FIG. The wireless communication unit 212 receives a signal representing a command or the like transmitted from the portable device 100 and outputs the received signal to the input / output unit 211d included in the control unit 211. In addition, the wireless communication unit 212 uses the intensity designated by the control unit 211 to indicate a control result of the control of the vehicle by the control unit 211 according to a command represented by the received reception signal, or a signal indicating the state of the vehicle detected by the control unit 211. To the portable device 100.

Next, referring to FIG. 4, the configuration of the control unit 211 will be described focusing on the function. FIG. 4 is a functional block diagram illustrating a configuration example of the control unit 211.
The control unit 211 includes an acquisition unit 211g, a vehicle control unit 211h, an intrusion detection unit 211i, an intensity detection unit 211j, a power generation determination unit 211k, and a communication control unit 211l.

  The acquisition unit 211g is realized by the execution unit 211a executing the acquisition process. The acquisition unit 211g acquires a reception signal received from the portable device 100 by the wireless communication unit 211c. In addition, the acquisition unit 211g acquires the result of controlling the vehicle 200 according to the control command represented by the received signal from the engine control device 221, the body control device 222, and the power management device 223. Furthermore, the acquisition unit 211g acquires a signal indicating that a moving body has been detected from a moving body detection sensor (not shown). The moving body detection sensor is constituted by, for example, a Doppler sensor, and detects the presence of a moving body in the vehicle interior of the vehicle 200 or around the vehicle (hereinafter simply referred to as the vehicle). The periphery of the vehicle includes at least a range that is outside the passenger compartment and can perform an intruding action on the vehicle.

  The vehicle control unit 211h is realized by the execution unit 211a executing a vehicle control process. The vehicle control unit 211h controls the vehicle 200 in accordance with the control command acquired by the acquisition unit 211g. Specifically, when the acquisition unit 211g acquires an engine start control command or an engine stop control command, the engine control device 221 is controlled to start or stop the engine 231. Further, when the acquisition unit 211g acquires the door lock control command or the door unlock control command, the body control device 222 is controlled to lock or unlock the door 235. Further, when the acquisition unit 211g acquires the monitoring start command or the monitoring end command, the intrusion detection unit 211i and the moving body detection (not shown) start monitoring the presence of the moving body in the vehicle or the intrusion into the vehicle 200 or end the monitoring. Control the sensor.

  The intrusion detection unit 211i is realized by the execution unit 211a executing intrusion detection processing. The intrusion detection unit 211i detects the presence of a moving body in the vehicle or the intrusion into the vehicle based on a signal output from a moving body detection sensor (not shown). As a specific example, when the signal output by the moving body detection sensor exceeds a predetermined value in the monitoring state where the presence of the moving body or the intrusion of the moving body is monitored, the presence of the moving body in the vehicle or the intrusion into the vehicle is detected. .

  The intensity detection unit 211j is realized by the execution unit 211a executing the intensity detection process. The strength detector 211j detects the strength of the received signal received from the wireless communication unit 212 by the acquisition unit 211g. As a specific example, the intensity detection unit 211j detects the peak voltage of the electrical signal received by the acquisition unit 211g from the wireless communication unit 212 as the intensity. In the present embodiment, the intensity detector 211j has been described as being realized by software processing. However, the present invention is not limited to this, and for example, a configuration realized by a hardware circuit having the function of the intensity detector 211j. Can be adopted.

  The power generation determination unit 211k is realized by the execution unit 211a executing the power generation determination process. The power generation determination unit 211k determines whether or not the power generator 232 generates power that is supplied to any one or more of the storage battery 233 and the wireless communication unit 212. As a specific example, the power generation determination unit 211k determines whether or not the power generator 232 is generating power based on the control result of the power generator 232 acquired by the acquisition unit 211g from the power management device 223. As another specific example, the power generation determination unit 211k determines whether or not the generator 232 is generating power based on the number of revolutions of the engine 231 represented by the control result acquired by the acquisition unit 211g from the engine control device 221. Can be adopted. As yet another specific example, the power generation determination unit 211k determines that the generator 232 is generating power when the rotational speed of the engine 231 output from a rotational speed sensor (not shown) exceeds a predetermined value. Can be adopted.

The communication control unit 211l is realized by the execution unit 211a executing the communication control process. The communication control unit 211l controls the wireless communication unit 212 to return a transmission signal representing a control result or the like to the portable device 100 with a strength corresponding to the strength of the signal detected by the strength detection unit 211j. The control result and the like include the control result of controlling the vehicle 200 by the vehicle control unit 211h and the state of the vehicle 200 detected by the intrusion detection unit 211i.
According to this configuration, since the control result or the like is transmitted with an intensity corresponding to the intensity of the signal received from the portable device 100, the control result or the like of the vehicle 200 can be reliably transmitted to the portable device 100 with less power consumption.

Specifically, when the peak voltage detected by the intensity detecting unit 211j is larger than a predetermined value, the communication control unit 211l sets the communication control unit 211l so that the transmission signal has a peak voltage smaller than the predetermined value. Control.
According to this configuration, when the strength of the signal received from the portable device 100 is strong, the portable device 100 is in an environment in which it is easy to transmit radio waves such as a close distance from the on-vehicle device 210 to the on-vehicle device 210. Even if a signal is returned with low strength, communication with the portable device 100 can be ensured.

Further, when the communication control unit 211l determines that the power generator 232 is generating power in the power generation determination unit 211k, the communication control unit 211l sets the wireless communication unit 212 to return a control result or the like with a stronger intensity than when it is determined that power generation is not performed. Control.
According to this configuration, since the control result or the like is transmitted with the strength corresponding to the supplied power, the control result or the like can be reliably transmitted to the portable device 100 while preventing the storage battery 233 from being consumed.

More specifically, when the communication control unit 211l determines that the generator 232 is generating power in the power generation determination unit 211k, wireless communication is performed so as to return a control result or the like with the strongest intensity that the wireless communication unit 212 can transmit. The unit 212 is controlled.
According to this configuration, when the generator 232 is generating power, the control result and the like are transmitted with the strongest strength, so that the control result and the like can be reliably transmitted to the portable device 100 while preventing the storage battery 233 from being consumed. .

Here, the control process executed by the control unit 211 will be described with reference to FIGS. 5 and 6 are flowcharts illustrating an example of a control process executed by the control unit 211. Note that the control unit 211 executes control processing at the time of activation.
First, the control unit 211 determines whether or not the power supply is turned “OFF” because, for example, the storage battery 233 has been removed or the power stored in the storage battery 233 has been depleted (step S11). The control unit 130 terminates the execution of the control process when determining that the power is turned “OFF”, and executes the process of step S12 otherwise.

  Next, the control unit 211 controls the wireless communication unit 212 to receive a signal transmitted from the portable device 100 (step S12). Thereafter, the control unit 211 determines whether the wireless communication unit 212 has received a signal from the portable device 100 (step S13). If the control unit 211 determines that a signal has been received, the control unit 211 executes the process of step S14. If not, the control unit 211 returns to step S11 and repeats the above process.

  In step S13, when the control unit 211 determines that a signal has been received, the control unit 211 performs the above-described control according to the control command represented by the received signal (step S14). Next, as described above, the control unit 211 determines whether or not the generator 232 is generating power based on whether or not the engine 231 is stopped (step S15). The control unit 211 executes the process of step S16 when determining that the engine 231 is stopped, and executes the process of step S18 otherwise.

  In step S15, when the control unit 211 determines that the engine 231 is stopped, the control unit 211 determines whether or not the reception strength of the signal received by the wireless communication unit 212 is “high” (step S16). ). Specifically, it is determined that the level is “large” when the peak voltage of the received signal is in the range of “4V” to “5V”. The control unit 211 executes the process of step S20 when determining that the reception intensity is the level “high”, and executes the process of step S17 otherwise.

  In step S16, when the control unit 211 determines that the reception intensity is not “high”, the control unit 211 determines whether the reception intensity is “medium” (step S17). Specifically, it is determined that the level is “medium” when the peak voltage of the received signal is in the range of “2V” to “4V”. The control unit 211 executes the process of step S19 when it is determined that the reception intensity is the “medium” level, and executes the process of step S18 otherwise.

  In step S15, when the control unit 211 determines that the engine 231 is not stopped, the control unit 211 sets the transmission output of the wireless communication unit 212 to the maximum. In step S17, when the control unit 211 determines that the reception strength is not “medium”, the control unit 211 determines that the reception strength is “low” and sets the transmission output to the maximum (step S18). . This is because the portable device 100 is estimated to be in an environment where it is difficult to receive radio waves such as a place far away. Specifically, the control unit 211 controls the communication control unit 211l wireless communication unit 211c so that the transmission signal has a peak voltage of “5V”.

  In step S17, when the control unit 211 determines that the reception intensity is level “medium”, the control unit 211 sets the transmission output to “medium” (step S19). Specifically, the control unit 211 controls the communication control unit 211l wireless communication unit 211c so that the transmission signal has a peak voltage of “4V”.

  In step S16, when the control unit 211 determines that the reception intensity is the level “high”, the control unit 211 sets the transmission output to “small” (step S20). This is because it is estimated that the portable device 100 is in an environment where it is easy to receive radio waves that are close to each other, for example. Specifically, the control unit 211 controls the communication control unit 211l wireless communication unit 211c so that the transmission signal has a peak voltage of “2V”.

  After executing Steps S18 to S20, the control unit 211 controls the communication control unit 211l wireless communication unit 211c to transmit the control result of the control executed in Step S14 with the output set in Steps S18 to S20 (Step S18). S21). Thereafter, the control unit 211 returns to step S11 and repeats the above process.

  5 and 6, the processes in steps S112 and S18 to S21 correspond to an example of a communication control process for realizing the communication control unit 211l. Further, the process of step S14 corresponds to an example of a vehicle control process for realizing the vehicle control unit 211h, and the process of step S15 corresponds to an example of a power generation determination process for realizing the power generation determination unit 211k, step S16. And the process of S17 is equivalent to an example of the intensity | strength detection process for implement | achieving the intensity | strength detection part 211j.

  Part or all of the functions realized by the in-vehicle device 210 executing software processing can be realized using a hardware circuit. Conversely, some or all of the functions realized by the in-vehicle device 210 using a hardware circuit can be realized by executing software processing.

  A program describing a processing procedure executed by the in-vehicle device 210 can be provided by being stored and distributed in a magnetic disk, an optical disk, a semiconductor memory, or another recording medium, or distributed via a network.

  The control method of the present invention can be implemented using the in-vehicle device 210.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed.

DESCRIPTION OF SYMBOLS 1 ... Control system 100 ... Portable machine
110: Display unit 120 ... Operation unit
130... Control unit (microcomputer) 130 a.
130b ... ROM 130d ... I / F
130f ... bus 140 ... wireless communication unit
200 ... Vehicle 210 ... In-vehicle device
211 ... Control unit 211a ... CPU
211b ... ROM 211c ... wireless communication unit
211d: Input / output unit 211f: Bus
211g ... acquisition unit 211h ... vehicle control unit
211i: Intrusion detection unit 211j: Strength detection unit
211k ... Power generation determination unit 211l ... Communication control unit
212 ... Wireless communication unit 221 ... Engine control device
222 ... Body control device 223 ... Power management device
231 ... Engine 232 ... Generator
233 ... Storage battery 235 ... Door

Claims (3)

An in-vehicle device that controls a vehicle according to wireless communication with a portable device,
A wireless communication unit that receives signals from the portable device;
Strength detection processing for detecting the strength of the signal received by the wireless communication unit;
Vehicle control processing for controlling the vehicle according to the signal received by the wireless communication unit;
A communication control process for controlling the wireless communication unit to return a signal representing a control result of controlling the vehicle in the vehicle control process to the portable device with an intensity corresponding to the intensity of the signal detected in the intensity detection process;
An in-vehicle device comprising: a control unit that executes The vehicle control process controls the start of the engine mounted on the vehicle according to the signal received by the wireless communication unit,
The wireless communication unit returns the engine control result to the portable device using the power supplied by the storage battery,
The control unit is a power generation determination process for determining whether or not the generator that generates power by the rotation of the engine started in the vehicle control process generates power to be supplied to any one or more of the storage battery and the wireless communication unit. And execute
The communication control process is characterized in that when it is determined that the generator is generating power in the power generation determination process, the wireless communication unit is controlled so that the control result is returned with a stronger intensity than when it is determined that the power generation is not performed. The in-vehicle device according to claim 1. A control method for controlling a vehicle according to wireless communication performed with a portable device,
A wireless communication step in which the wireless communication unit receives a signal from the portable device;
An intensity detection step for detecting the intensity of the signal received in the wireless communication step;
A vehicle control step for controlling the vehicle according to the signal received in the wireless communication step;
A communication control step for controlling the wireless communication unit so that a signal representing a control result of controlling the vehicle in the vehicle control step is returned to the portable device with an intensity corresponding to the intensity of the signal detected in the intensity detection step. Control method.

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