JP4213719B2 - In-vehicle device remote control device - Google Patents

Description

 The present invention relates to a vehicle-mounted device remote control device that includes a portable device and a vehicle-mounted device that controls the vehicle-mounted device based on communication with the portable device based on code verification through communication with the portable device.

Conventionally, in addition to the remote operation function of operating / operating the portable unit to lock / unlock the door of the vehicle, the return code signal for the transmission request signal from the vehicle without operating the operation unit. There is a smart entry system that locks / unlocks a door by sending back and checking a code.
For example, in Patent Document 1, when a call signal is received by a first receiving unit, a portable wireless device including a first transmitting unit that transmits a response signal and a predetermined time interval from the second transmitting unit. When the response signal transmitted from the portable wireless device in response to the call signal transmitted in step 2 is received by the second receiving means, a signal for unlocking the vehicle door is output, and the response signal is not received. In addition, a system is described that includes a vehicle radio apparatus including a control unit that outputs a signal for locking the door of the vehicle after a predetermined time has elapsed.

Conventionally, a return code signal is returned in response to a transmission request signal from the vehicle side, and the code is collated to unlock the steering lock mechanism and release the engine start prohibition device, and use a mechanical key. There is a smart start system that makes it possible to start the engine.
For example, in Patent Document 2, when a call signal is transmitted to a portable wireless device, a personal identification code signal is received from the portable wireless device, and matched with an internal code, an unlocking operation of a steering lock mechanism, an engine switch A system composed of means for permitting each of the switching operation and the switching operation of the accessory switch is described.

Japanese Patent Laid-Open No. 5-106376 (pages 2 to 4, FIG. 2) Japanese Patent Laid-Open No. 63-1765 (pages 2 to 4, FIG. 2) Japanese Patent Laying-Open No. 2005-207083 (pages 3 to 6, FIG. 1)

Hereinafter, the name of the system combining both the above-mentioned systems will be referred to as a smart entry / start system. The smart entry / start system uses wireless communication, but when the engine switch is turned and the accessory switch (hereinafter referred to as ACC switch) is turned on, the electronic devices equipped in the vehicle operate. When the engine switch is turned and an ignition switch (hereinafter referred to as an IG switch) is turned on, various auxiliary machines of the vehicle also operate, and the electromagnetic field environment becomes an environment with a lot of electromagnetic noise for wireless communication.
Furthermore, in a vehicle, it is an environment in which general electronic devices can be brought in and used after being converted to a DC power source or AC of the vehicle, and electromagnetic noise from these electronic devices and the power supply device also becomes an obstacle to wireless communication. there is a possibility.

The smart entry / start system performs most wireless communications when the above-described electromagnetic noise source in the non-rotating state of the engine switch = Lock position is inactive. In vehicles currently equipped with a smart entry / start system, a display is provided when the wireless communication for rotating the engine switch is OK or NG.
However, some important features such as wireless communication when the engine is restarted while the vehicle's auxiliary equipment and electronic equipment are in operation, and wireless communication when the ACC switch or IG switch is turned on are detected when the mobile device is taken out. With such a function, it is necessary to perform wireless communication in an environment in which an auxiliary machine or an electronic device is operating. It is unclear whether wireless communication can be performed in an environment with a lot of electromagnetic noise after rotation of the engine switch at the portable device position where wireless communication is established before the engine switch is rotated.

  In Patent Document 3, noise reduction is performed by “reducing the reception sensitivity of the portable device when the engine is started and restoring the reception sensitivity of the portable device when the engine is stopped”. However, in this case, the communication range with the portable device is narrowed while the engine is driven, and there is a possibility that the vehicle is erroneously determined to be out of the vehicle despite being in the vehicle interior.

 The present invention has been made to solve the above-described problems, and provides an in-vehicle device remote control device capable of improving the reliability of wireless communication with a portable device without impairing convenience. The purpose is that.

The vehicle-mounted device remote control device according to the present invention includes a vehicle-mounted device that is mounted on a vehicle and controls other vehicle-mounted devices, and a portable device that communicates wirelessly with the vehicle-mounted device, and the code request signal from the vehicle-mounted device to the portable device. In the in-vehicle device remote control device that enables remote control of the in-vehicle device by the portable device when the code verification of the answer code returned from the portable device that has received this code request signal is made in the in-vehicle device,
The in-vehicle device has a monitoring timer that measures a predetermined time. When the vehicle state changes to a predetermined state, the on-vehicle device indicates the reception state of the portable device to the portable device for a predetermined time measured by the monitoring timer after the change. While sending a reception status reply request signal for requesting information,
The portable device has reception state detection means for detecting the reception state from the in-vehicle device, and information indicating the reception state detected by the reception state detection means when receiving the reception state reply request signal transmitted from the in-vehicle device. the reply, the vehicle-mounted device is one that has a display device for displaying information indicating the reception state.

As described above, the present invention includes a vehicle-mounted device that is mounted on a vehicle and controls other vehicle-mounted devices, and a portable device that communicates wirelessly with the vehicle-mounted device, and transmits a code request signal from the vehicle-mounted device to the portable device. In the in-vehicle device remote control device that enables remote control of the in-vehicle device by the portable device when the code verification of the answer code returned from the portable device that has received this code request signal is made in the in-vehicle device,
The in-vehicle device has a monitoring timer that measures a predetermined time. When the vehicle state changes to a predetermined state, the on-vehicle device indicates the reception state of the portable device to the portable device for a predetermined time measured by the monitoring timer after the change. While sending a reception status reply request signal for requesting information,
The portable device has reception state detection means for detecting the reception state from the in-vehicle device, and information indicating the reception state detected by the reception state detection means when receiving the reception state reply request signal transmitted from the in-vehicle device. the reply, vehicle device, because it has a display device for displaying information indicating the reception state, such as during a wireless electromagnetic noise becomes a communication failure the vehicle increases vehicle device actuation of the portable device, the portable device is By enabling the transmission of the reception state and displaying the reception state of the portable device transmitted from the portable device, the user can confirm that the system can operate normally.

Embodiment 1 FIG.
1 is a block diagram showing an in-vehicle device of an in-vehicle device remote control apparatus according to Embodiment 1 of the present invention.
In FIG. 1, the in-vehicle device remote control device includes an in-vehicle device 10 and the portable device in FIG. The in-vehicle device 10 has six transmission antennas of a first in-vehicle transmission antenna 11a and a second in-vehicle transmission antenna 11b as the in-vehicle transmission antenna 11, and a first to fourth out-of-vehicle transmission antennas 12a to 12d as the out-of-vehicle transmission antenna 12. ing. As shown in FIG. 4, the first in-vehicle transmission antenna 11a is installed in the center console in the vehicle interior, and the second in-vehicle transmission antenna 11b is installed near the rear seat. On the other hand, the outside transmission antenna 12 is provided on, for example, a door handle of a vehicle (four-wheeled vehicle). The in-vehicle transmission antenna 11 and the out-of-vehicle transmission antenna 12 may be collectively referred to as a transmission antenna. The transmission antenna is connected to the transmission unit 17, and the transmission unit 17 is connected to an ECU (electronic control unit) 20.

The ECU 20 supplies a signal specifying one of the transmission code and the transmission antennas 11 and 12 to the transmission unit 17, and a query signal as a code request signal having a frequency at which the transmission code is modulated, for example, 134 kHz, is specified. Is transmitted to the portable device 50 from the transmitted antenna.
Further, the vehicle is provided with a receiving antenna 18, and a signal from the portable device 50 received by the receiving antenna 18, for example, a signal having a frequency of 315 MHz, is demodulated by the receiving unit 19 and supplied to the ECU 20.

The ECU 20 has a built-in memory 24 in which an ID code for a call signal, a question signal, and an immobilizer, which will be described later, and an encryption key for decrypting the immobilizer and the answer code are stored. The memory 24 is a nonvolatile memory such as an EEPROM, and the stored contents are retained even when the power is turned off.
The operation detection unit 21 detects various switch operations by the user, and for example, presses an activation switch (signal source for starting transmission of a code request signal) or an engine switch installed on each outer door handle. Then, the positions of the key knob switch for starting communication for unlocking and the engine switch (starting, ignition on, accessory on, off and locking, etc.) are detected, and the operation detection signal is supplied to the ECU 20. .
The door open / close detection unit 22 detects individual open / close states of all doors and individual lock / unlock states of all doors, and supplies detection signals to the ECU 20.
The sensor group 23 is various sensors that detect the vehicle speed, the shift position, and the engine operating state, and detection signals of these various sensors are supplied to the ECU 20.
The notification unit 25 is a so-called answer back when the door is locked / unlocked, an answer back device for lighting a vehicle light or blowing a horn, an alarm device for generating a buzzer for various alarms, and a receiving state to be described later A display device for displaying the above is included.
The in-vehicle device 10 is configured as described above. In addition, the operation detection part 21, the door opening / closing detection part 22, the sensor group 23, and the alerting | reporting part 25 may be shared with another system.

Further, the ECU 20 is connected to a steering lock unit 32, an immobilizer unit 34, a door lock unit 36, and a shift lock unit 38, which are controlled by the in-vehicle device remote control device.
The steering lock unit 32 releases the rotation lock mechanism from the lock position of the engine switch, and simultaneously releases the mechanical lock mechanism for steering operation. When the engine switch is returned to the lock position, both lock mechanisms are locked.
The immobilizer unit 34 is a mechanism that prohibits fuel supply to the engine 40 and ignition operation. The door lock unit 36 is a mechanism for locking / unlocking all doors. The shift lock unit 38 is a transmission gear shift mechanism, and is a lock device that prohibits a shift from the parking range to another range, and outputs an unlock / permitted signal from the ECU 20.
Furthermore, the engine control unit 30 is connected to the ECU 20, and the engine control unit 30 can control the start of the engine 40 using a cell motor and can also control the driving stop of the engine 40.

FIG. 2 is a block diagram showing a portable device of the in-vehicle device remote control device according to Embodiment 1 of the present invention.
In FIG. 2, a memory 53 is built in the ECU 52 of the portable device 50, and the same ID code and encryption key as those stored in the memory 24 of the in-vehicle device 10 are stored in the memory 53 if it is authorized. Stored. The portable device 50 has a transmission antenna 56 and a reception antenna 58. The antennas 56 and 58 are connected to the transmission unit 55 and the reception unit 57, respectively, and the transmission unit 55 and the reception unit 57 are connected to the ECU 52.
A signal from the vehicle-mounted device 10 received by the receiving antenna 58, for example, a question signal having a frequency of 134 kHz, is demodulated by the receiving unit 57 and supplied to the ECU 52. Further, the ECU 52 reads an encryption key corresponding to the question signal from the memory 53, encrypts the question code in the question signal, creates an answer signal, supplies the answer signal to the transmitter 55, and is modulated by the transmitter 55. For example, the signal is transmitted from the transmission antenna 56 toward the vehicle-mounted device 10 as a signal having a frequency of 315 MHz.
Further, the portable device 50 has a LOCK key / UNLOCK key for performing a door lock / unlock remote operation as a keyless entry function, and these signals are input from the operation detection unit 51 to the ECU 52. .

FIG. 3 is a block diagram showing the receiving unit of the portable device of the in-vehicle device remote control device according to Embodiment 1 of the present invention.
3, 52, 57 and 58 are the same as those in FIG. FIG. 3 shows a connection state between the receiving unit 57 and the ECU 52 and the receiving antenna 58.
In the preamble portion of the signal shown in FIGS. 7A and 7C, which will be described later, received by the receiving antenna 58, the receiving unit 57 sends a signal to the ECU 52 when a predetermined frequency component exceeds a demodulatable level. The activation detection unit 57a that outputs a wake signal, the reception magnetic field strength detection unit 57c (reception state detection means) that similarly holds the reception level in the preamble portion and outputs it as an RSSI signal to the ECU 52, and the code portion after the preamble portion Demodulator 57b that demodulates and outputs a data signal to ECU 52, and controller 57d that resets activation detector 57a and received magnetic field strength detector 57c in preparation for the next new reception when reset signal is input. Composed.

FIG. 4 is a schematic diagram showing communication between the in-vehicle device and the portable device of the in-vehicle device remote control device according to Embodiment 1 of the present invention, and FIG. 4 (a) shows a case where the portable device is outside the vehicle. (B) is a figure which shows the case where a portable machine exists in a vehicle.
In FIG. 4, 11a, 11b, 12a-12d, 18, 50 are the same as those in FIG.
FIG. 4 schematically shows communication between the transmission antennas 11 and 12 arranged in the vehicle and the portable device 50. The method for confirming whether the portable device 50 is a legitimate registered device (partner authentication method) has been described as a so-called challenge-response method (secret key encryption-based partner authentication method) as an example.
A code request signal (question signal) with a frequency of 134 kHz is transmitted from each of the transmission antennas 11 and 12 of the in-vehicle device 10, and when the portable device 50 receives the code request signal, an encryption key corresponding to the received question signal and An answer signal having a frequency of 315 MHz modulated with an answer code (cipher text) created from the question code (plain text) is returned.
The answer signal having a frequency of 315 MHz received by the receiving antenna 18 of the in-vehicle device 10 is demodulated by the receiving unit 19 and supplied to the ECU 20, and the ECU 20 receives the answer signal. The in-vehicle device 10 checks whether or not the portable device 50 is a legitimate registered device by collating the ciphertext created with the encryption key corresponding to the transmitted question code (plaintext) with the received answer code.
Low frequencies (hereinafter abbreviated as LF) are used from the transmitting antennas 11 and 12 of the in-vehicle device 10 to the portable device 50. This is because the electromagnetic wave uses a magnetic field component whose intensity is inversely proportional to the cube of the distance so that the position of the portable device 50 can be easily confirmed, and the normal communication distance is about 1 m. On the other hand, the UHF band is used for communication from the portable device 50 to the in-vehicle receiving antenna 18, and the communication distance is usually 5 to 20 m.

FIG. 5 is a flowchart showing communication processing with the portable device of the ECU of the vehicle-mounted device of the vehicle-mounted device remote control device according to Embodiment 1 of the present invention.
FIG. 6 is a diagram for displaying the reception state of the in-vehicle device of the in-vehicle device remote control apparatus according to Embodiment 1 of the present invention, and FIGS. 6 (a) and 6 (b) are display examples.

FIG. 7 is a diagram showing each signal used for communication between the in-vehicle device and the portable device of the in-vehicle device remote control device according to Embodiment 1 of the present invention.
FIG. 7 shows a configuration example of a call signal, a response signal, a question signal, an answer signal, and a remote control signal.
FIG. 7A shows a configuration of a call signal (reception status reply request signal) from the in-vehicle device to the portable device, and a fixed ID code (for example, 20) including a preamble (for example, a burst signal of about 5 ms) and fixed-length ID information. Bit), a bit indicating a call signal, an additional code (for example, 4 bits) including bit information for reception monitoring mode, and a parity bit.
FIG. 7B shows the structure of the response signal from the portable device to the vehicle-mounted device in response to the calling signal shown in FIG. 7A, and shows an additional code including information such as a preamble, a fixed ID code, and a portable device number, and a reception state. It consists of RSSI information (for example, 4 bits), which is information, and parity bits.

FIG. 7 (c) shows the structure of the question signal from the in-vehicle device to the portable device. Preamble, fixed ID code, additional code including a bit indicating that it is a question signal and the number of the portable device to be responded, each time randomly It consists of a question code, which is a plaintext to be generated (for example, 32 bits), and a parity bit.
FIG. 7D shows the structure of the response signal from the portable device to the in-vehicle device in response to the question signal shown in FIG. 7C, and includes information such as a preamble, a fixed ID code, a bit indicating the response signal, and a portable device number. It consists of a code, an answer code which is a ciphertext obtained by encrypting the received question code with an encryption key, and a parity bit.
FIG. 7E shows a configuration of a remote control signal from the portable device to the vehicle-mounted device. In place of the answer code in FIG. 7D, rolling that is a value counted up every time the portable device transmits a radio wave. The code is set. The additional code in FIG. 7E includes identification information of the response signal and the remote control signal.

Next, communication processing with the portable device of the ECU 20 of the in-vehicle device 10 will be described with reference to FIG.
In the flowchart of FIG. 5, after the ECU 20 is activated, the driver's seat door is opened from the closed state when each of the start switch, key knob switch, and engine switch ignition ON position (hereinafter referred to as “IG ON”) is turned on. It shows the processing of a program that starts executing (step 200) when it enters a state and at regular intervals (for example, every second) during the reception monitoring mode. In step 201, it is confirmed which of these execution conditions are satisfied.

When the activation switch is on (step 202), from the outside transmission antenna 12 corresponding to the activation switch that is turned on at step 203 (for example, the outside transmission antenna 12a if the outer handle activation switch of the right front door is on). A ringing signal is transmitted. In step 204, a response signal response to the call signal is confirmed. If there is no reply, the process ends at step 299. If there is a reply, a question signal is transmitted from the same outside transmission antenna 12 (step 205). In step 206, the response of the answer signal to the question signal is confirmed. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the reply is correct, it is checked in step 207 whether the door is unlocked. If in the locked state, the door unlocking output is instructed in step 213, and the process ends in step 299. If it is in the unlocked state, in steps 208 and 209, it is confirmed whether or not the engine switch is in the locked position and all the doors are closed (condition 1).
If condition 1 is satisfied, a call signal is transmitted from all in-vehicle transmission antennas 11 in step 209, and if it can be confirmed in step 210 that portable device 50 is not in the vehicle (no reply), in step 211. The door locking output is instructed, and the process ends at step 299.
If condition 1 is not satisfied in steps 208 and 209, or if there is a reply in step 210, an alarm output is instructed in step 212 to notify that lock operation cannot be performed, and the process ends in step 299.

If the key knob switch is turned on in step 201 (step 220), a call signal is transmitted from all the in-vehicle transmission antennas 11 in step 221. In step 222, a response signal response to the call signal is confirmed. If there is no reply, the process ends at step 299. If there is a reply, a question signal is transmitted from the in-vehicle transmission antenna 11 (step 223). In step 224, the response of the answer signal to the question signal is confirmed. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the answer to the reply is correct, in step 225, a call signal in which a bit indicating the reception monitor mode is set in the additional code portion of the call signal is transmitted from the in-vehicle transmission antenna 11, and the monitor that operates in the reception monitor mode is operated. A timer is set, an engine switch unlock output is instructed in step 226, and the process ends in step 299.

If IG is ON in step 201 (step 230), a call signal is transmitted from all in-vehicle transmission antennas 11 in step 231. In step 232, a response signal response to the call signal is confirmed. If there is no reply, the process ends at step 299.
If there is a reply, a question signal is transmitted from the in-vehicle transmission antenna 11 (step 233). In step 234, the response of the answer signal to the question signal is confirmed. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the answer to the reply is correct, the engine start permission is output at step 236 and the process ends at step 299.

  In step 201, when the driver's seat door is changed from open to closed (step 250), it is checked in step 251 whether the engine switch is in the locked position, and if it is in the locked position, the process ends in step 299. If it is not at the Lock position, a paging signal is transmitted from all the in-vehicle transmission antennas 11 at step 252. In step 253, a response signal response to this call signal is confirmed. If there is a reply, the process ends at step 299. If there is no reply, an alarm output for informing that the portable device 50 has been taken out is instructed, and the process ends at step 299.

  In step 201, when a predetermined time elapses (for example, every second) with the monitoring timer indicating the reception monitoring mode set (step 260), RSSI information in the received response signal is obtained (step 260). 261), in step 262, the reception status display output is instructed. In step 263, a call signal in which a bit indicating the reception monitoring mode is set in the additional code part of the call signal is transmitted from the in-vehicle transmission antenna 11, and the process ends in step 299.

6A and 6B are displayed on the instrument panel as a display for indicating whether or not the engine switch can be rotated (for example, when the engine switch can be rotated, Green, if not possible, red.)
As an example of the reception status display in step 262, when the reception status is NG, the red lighting time ratio is increased in proportion to the red and the reception status is improved. Display output that reduces the lighting time ratio.

  On the other hand, when a remote control signal (door LOCK signal / UNLOCK signal) from the portable device 50, which is a conventional keyless entry function, is received, the door is locked / unlocked regardless of the flowchart of FIG. Is done.

The remote control signal for keyless entry for controlling the locking / unlocking of the vehicle door by pressing a button provided on the portable device 50 is, as shown in FIG. Instead, set a rolling code.
This rolling code is a value that is counted up each time the portable device 50 transmits radio waves, and the in-vehicle device 10 stores the rolling code included in the predetermined code received from the portable device 50 in the previous time. When the rolling code included in the predetermined code received this time is within a predetermined range from the value of the previous rolling code, it is determined that the current rolling code is correct, and it is determined that the received predetermined code matches the specific code. To do. This additional code includes identification information of the response signal and the remote control signal.

FIG. 8 is a flowchart showing an operation in communication with the in-vehicle device of the portable device of the in-vehicle device remote control device according to Embodiment 1 of the present invention.
Next, the operation of the portable device 50 will be described based on FIG.
When the ECU 52 starts from the reset state due to battery replacement or the like, the processing starts from START (500), and the ECU 52 is initialized in step 501 and is in a standby state in step 502.

  If there is a LOCK key input in step 503, WAKE UP (step 504) and a LOCK signal which is a remote operation signal is transmitted (step 505). After the transmission is completed, the process returns to step 502. If there is no LOCK key input in step 503, the process goes to step 506.

  If there is an UNLOCK key input in step 506, WAKE UP (step 507) and an UNLOCK signal which is a remote operation signal is transmitted (step 508). After the transmission is completed, the process returns to step 502. In step 506, if there is no UNLOCK key input, go to step 509.

If there is reception (LF reception) from the in-vehicle device 10 in step 509, WAKE UP (step 510) is performed, and in step 511, it is confirmed whether the received signal is a call signal. If it is not a call signal, in step 512, an answer code is generated from the received question code and an answer signal is transmitted. After the transmission is completed, the process returns to step 502.
In step 511, if the call signal is received, in step 513, it is confirmed whether the reception monitoring mode is set by the bit indicating the reception monitoring mode in the additional code. The response signal is transmitted, and the process returns to step 502.
In the reception monitoring mode, in step 515, in the RSSI information, if reception is unsuccessful, information indicating reception failure is transmitted, and if reception is successful, a response signal is transmitted as information corresponding to the reception level. To do. In step 516, the next reception timing (for example, after 1 second) is waited. When that timing is reached, reception is performed in step 517, and the flow proceeds to step 511.

By such operations of the vehicle-mounted device 10 and the portable device 50, the user recognizes information on whether or not wireless communication is possible particularly in an environment where there is a lot of electromagnetic noise after the engine switch is rotated. By moving the portable device 50, the function scheduled by the system can be activated, and a highly reliable system can be realized.
Also, before the noise increases after the engine switch turns, transmission of a reception state reply request signal is started, communication with the portable device 50 is made possible, and a reception state reply request is made for a predetermined time after the engine switch is turned. Since the signal is transmitted, the portable device 50 can be moved to a communicable position in the meantime, which is preferable.

According to the first embodiment, the portable device can transmit the reception state for a predetermined time immediately after the operation of the in-vehicle device, in which the electromagnetic noise of the vehicle that interferes with the wireless communication with the portable device increases. By displaying the reception status of the portable device transmitted from the user, the user can confirm that the system can operate normally.
Also, if a display indicating that the reception state is bad appears, the user can move the portable device to a position where the reception state is displayed as good.
Also, if you try to restart the engine when the engine switch is in the IG ON state, wireless communication with the portable device is not possible due to electromagnetic noise from auxiliary equipment or electronic equipment that operates under the IG ON condition, and the engine starts. The problem with the conventional system that there is a possibility of being unable to do so is also eliminated. In the present invention, since the communication state with the portable device can be confirmed in a state with a lot of electromagnetic noise, the above-described problems can be prevented and a highly reliable system can be realized.
In addition, since the monitoring timing of the reception state is set to a predetermined time after the rotation before the engine switch is rotated, the portable device can be set to the reception state monitoring mode from an environment where there is little electromagnetic noise before the engine switch is rotated. Is preferable. The predetermined time after the rotation is determined in consideration of battery consumption on the portable device side.

Embodiment 2. FIG.
FIG. 9 is a flowchart showing communication processing with the portable device of the ECU of the vehicle-mounted device of the vehicle-mounted device remote control device according to Embodiment 2 of the present invention.
In FIG. 9, step 235 is provided between step 234 and step 236 in FIG. 5, and step 225 in FIG. 5 is deleted. In the following, only the parts different from FIG. 5 and the steps before and after that will be described with reference to FIG.
In step 201, when the IG is on (step 230), in step 234 during processing, the reply of the answer signal to the question signal is confirmed. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the answer to the reply is correct, in step 235, a call signal in which a bit indicating the reception monitor mode is set in the additional code portion of the call signal is transmitted from the in-vehicle transmission antenna 11, and the monitor that operates in the reception monitor mode is operated. The timer is set, the engine start permission is instructed in step 236, and the process ends in step 299.
In step 201, when the key knob switch is on (step 220), the reply of the answer signal to the question signal is confirmed in step 224 during processing. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the answer to the reply is correct, the engine switch lock release output is instructed in step 226, and the process ends in step 299.

  As described above, before the noise increases after the engine is started, transmission of the reception state reply request signal is started, communication with the portable device 50 is made possible, and the reception state reply request signal is set for a predetermined time from the engine start. Since transmission is performed, the portable device 50 can be moved to a communicable position during that time. For this reason, it is possible to prepare for situations such as an emergency engine restart, and the reliability of the system is improved.

  According to the second embodiment, since the start of the reception state monitoring timing is set to a predetermined time after the engine is started before the engine is started, the problem can be solved by performing it at the timing before the engine is started.

Embodiment 3 FIG.
FIG. 10 is a flowchart showing a communication process with the portable device of the ECU of the vehicle-mounted device of the vehicle-mounted device remote control device according to Embodiment 3 of the present invention.
In FIG. 10, step 225 of FIG. 5 is deleted. In step 201, when the shift shift position changes from parking (P) or neutral (N) to a position other than P or N, or when the vehicle speed becomes a predetermined value (for example, 10 km / h) or less. In addition to the execution conditions, steps 270 and 271 which are processes in this case are added.
In the following, only the parts different from FIG. 5 and the steps before and after that will be described with reference to FIG.
In step 201, when the key knob switch is on (step 220), in step 224 during processing, the reply of the answer signal to the question signal is confirmed. If there is no reply or the reply answer is incorrect, the process ends at step 299.
If the answer to the reply is correct, the engine switch lock release output is instructed in step 226, and the process ends in step 299.
In step 201, when the shift shift position changes from parking (P) or neutral (N) to a position other than P or N, or when the vehicle speed becomes a predetermined value (for example, 10 km / h) or less ( Step 270) is added to the execution conditions. If these are confirmed, a call signal in which a bit indicating the reception monitoring mode is set in the additional code portion of the call signal is transmitted from the in-vehicle transmission antenna 11 in step 271. A monitoring timer that transmits and operates during the reception monitoring mode is set, and the process ends in step 299.

As described above, since the reception position return request signal is transmitted for a predetermined time after the shift position is changed from P or N, the wireless communication state with the portable device is changed before the vehicle starts to travel. Can confirm and notify the user.
In addition, since the reception status reply request signal is transmitted for a predetermined time after the vehicle is lowered to the predetermined speed, the wireless communication state with the portable device can be confirmed before the vehicle stops and gets off. The mobile device can be moved to a communicable position. After stopping, it is possible to reliably alert the user to take the portable device out of the vehicle, improving the reliability of the system.

According to the third embodiment, since the start of the reception state monitoring timing is set to a predetermined time after the shift position is changed from P or N to other than that, the mobile station and the portable device immediately before the vehicle starts to travel. By confirming the communication status, a sense of security can be given to the user.
In addition, when the user thinks of checking the communication state with the portable device in various cases regardless of the traveling of the vehicle, the change of the shift position is suitable for easy operation.
In addition, since the monitoring timing of the reception state is set to a predetermined time after the vehicle speed has decreased to a predetermined speed, it may not be possible that the reception state has changed during traveling, so the communication state with the portable device should be changed before the vehicle stops. Being able to confirm has the advantage that it is possible to reliably carry out checks of portable devices that may occur after stopping.

It is a block diagram which shows the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a block diagram which shows the portable machine of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a block diagram which shows the receiving part of the portable device of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a schematic diagram which shows communication with the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 1 of this invention, and a portable device. It is a flowchart which shows a communication process with the portable apparatus of ECU of the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a figure which displays the reception state of the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a figure which shows each signal used for communication between the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 1 of this invention, and a portable device. It is a flowchart which shows the operation | movement in communication with the vehicle equipment of the portable device of the vehicle equipment remote control apparatus by Embodiment 1 of this invention. It is a flowchart which shows a communication process with the portable apparatus of ECU of the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 2 of this invention. It is a flowchart which shows a communication process with the portable apparatus of ECU of the vehicle equipment of the vehicle equipment remote control apparatus by Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 In-vehicle apparatus 11 In-vehicle transmission antenna 12 Out-of-vehicle transmission antenna 17 Transmitter (on-vehicle apparatus)
18 Receiving antenna (vehicle equipment)
19 Receiver (on-vehicle device)
20 ECU (vehicle equipment)
21 Operation detector (on-vehicle equipment)
22 Door open / close detection unit (onboard equipment)
23 Sensor group (vehicle equipment)
24 memory (vehicle equipment)
25 Notification unit (vehicle equipment)
50 Mobile device 51 Operation detection unit (mobile device)
52 ECU (portable machine)
54 Notification unit (mobile device)
55 Transmitter (portable device)
56 Transmitting antenna (mobile device)
57 Receiver (portable device)
57c Received Magnetic Field Strength Detection Unit 58 Receiving Antenna (Portable Machine)

Claims (5)

A vehicle-mounted device that controls other vehicle-mounted devices and a portable device that communicates wirelessly with the vehicle-mounted device, transmits a code request signal from the vehicle-mounted device to the portable device, and receives the code request signal In the in-vehicle device remote control device that enables remote control of the in-vehicle device by the portable device, when the code verification of the answer code returned from the portable device is made in the in-vehicle device,
The in-vehicle device has a monitoring timer for measuring a predetermined time, and when the vehicle state changes to a predetermined state, the portable device is connected to the portable device for a predetermined time measured by the monitoring timer after the change. While sending a reception status reply request signal requesting information indicating the reception status of
The portable device includes a reception state detection unit that detects a reception state from the in-vehicle device, and when the reception state return request signal transmitted from the in-vehicle device is received, the reception state detection unit detects the reception state returns the information indicating the reception state, the vehicle device, the vehicle-mounted equipment remote control device, characterized in that it comprises a display device for displaying information indicating the reception state.   The in-vehicle device remote control device according to claim 1, wherein the reception status reply request signal is transmitted for a predetermined time after the engine switch is rotated before the engine switch is rotated.   The in-vehicle device remote control device according to claim 1, wherein the reception status reply request signal is transmitted for a predetermined time after the engine is started before the engine is started.   2. The in-vehicle device remote control device according to claim 1, wherein the reception status reply request signal is transmitted for a predetermined time after the shift position is changed from P or N to any other position.   2. The in-vehicle device remote control device according to claim 1, wherein the reception status reply request signal is transmitted for a predetermined time after the vehicle is lowered to a predetermined speed.

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