JP3287277B2 - Vehicle locking control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock control device for a vehicle, and more particularly to a device for remotely controlling a vehicle-mounted device.

[0002]

2. Description of the Related Art Conventionally, there has been a so-called smart entry system in which a user carries a portable wireless device (portable device) and unlocks / locks a door of a vehicle simply by approaching / leaving the vehicle. For example, Japanese Unexamined Patent Publication No. 5-106376 discloses a portable radio apparatus having a first transmitting means for receiving a response signal (return signal) when a calling signal (transmission request signal) is received by the first receiving means. And a signal for unlocking the door of the vehicle when a return request signal transmitted at a predetermined time interval from the second transmission means is received by the second reception means. And a control means for outputting a signal for locking the vehicle door after a predetermined time elapses if a return signal is not received. A system for locking or unlocking a vehicle door simply by moving away or approaching is described.

[0003]

In the conventional apparatus, when a passenger is present in a vehicle and the driver gets off the vehicle in a hurry, and the passenger tries to get off later, the passenger is required to get off before the passenger gets off the vehicle. When the driver carrying the portable device leaves the vehicle, the door lock of the vehicle is locked, which is inconvenient for the passenger.
In such a case, the driver also releases the door lock,
After taking down the passenger and re-locking,
There was a problem that it was bothersome.

[0004] The present invention has been made in view of the above points,
After detecting the driver's getting off, the door lock system
An object of the present invention is to provide a vehicle locking control device that prevents a door lock from being locked before a passenger occupies the vehicle by operating a control without inadvertently locking a door lock.

[0005]

According to a first aspect of the present invention, there is provided a transmitter provided in a vehicle, for transmitting a transmission request signal from a transmission antenna, and receiving a signal transmitted from the transmitter and returning a signal. And a portable device for transmitting the
A receiver that receives a return signal transmitted from the portable device, a door lock control unit that locks a door lock of the vehicle by receiving the return signal with the receiver, and an alighting detection that detects a driver getting off the vehicle Means, and timer means for measuring a predetermined time after detecting the driver's getting off by the getting-off detection means, and after measuring the predetermined time by the timer means.
Cause the transmitter to transmit a transmission request signal, and then
The return signal transmitted from the device is received by the receiver, and the door lock control means is operated. As described above, since the door lock is locked for a predetermined time after the driver gets off the vehicle, there is no need to keep the driver's seat door open, and the troublesomeness can be eliminated. According to a second aspect of the present invention, in the vehicle lock control device according to the first aspect, there is provided a switch unit for temporarily switching between prohibition and permission of the operation of the door lock control unit. In this way, by temporarily switching the inhibition and permission of the operation of the door lock control means, the smart lock can be temporarily inhibited or permitted according to the presence or absence of a fellow passenger. According to a third aspect of the present invention, in the vehicle locking control device according to the first aspect, at least one of the transmission request signal and the return signal is set to a frequency in a band where the wraparound is small. Locking control device. For this reason, after the driver who puts the portable device in the breast pocket gets off and turns back to the vehicle side, the door lock can be automatically locked and confirmed, and if the driver does not turn back to the vehicle side , The door lock is not locked,
Door lock control according to the driver's will can be realized.

[0006]

[0007]

[0008]

[0009]

[0010]

FIG. 1 is a block diagram showing a first embodiment of the apparatus according to the present invention. In FIG. 1, a body multiplexing ECU (electronic control unit) 10 as a door lock control unit controls various types of vehicle-related matters such as control of automatic lighting of headlights and meters of a vehicle, control of an air conditioner, control of a door lock, and the like. A microcomputer that performs control, is supplied with detection signals from an illuminance sensor (not shown), a temperature sensor (not shown), and the like, and further includes a door switch 11 that detects the opening and closing of a driver's seat door. A signal of a setting switch 12 for setting or canceling the smart lock and a signal of a push button type switch (switch means) 13 operated by the driver when temporarily inhibiting or activating the smart lock are supplied. The door lock motor 14 is driven by the control of the body multiplex ECU 10 to lock the door of the vehicle.

The transmitter 16 is provided in the vehicle and is turned on / off under the control of the body multiplexing ECU 10. When the transmitter 16 is turned on, the transmitter 16 generates a transmission request signal with a small wraparound frequency of, for example, 2.45 GHz and transmits it from the antenna 18. The receiver 20 is provided in the vehicle. The antenna 22 receives a return signal transmitted from the portable device 24 at a frequency of, for example, 300 MHz and slightly wrapping around the antenna 22, demodulates the signal, and demodulates the signal.
Supply 0.

The portable unit 24 receives the transmission request signal from the transmitter 16 by the antenna 26, detects the signal by the detection unit 28, and supplies it to the transmission unit 30. The transmitting unit 30 starts operation by the output of the detecting unit 28 or the turning on of the switch 32, generates a return signal obtained by modulating a carrier having a frequency of 300 MHz with a specific code, and transmits the signal from the antenna. FIG. 2 shows the transmitter 16
1 shows a circuit configuration diagram of one embodiment. In the figure, a control signal is supplied from a body multiplexing ECU 10 to a terminal 40. The control signal indicates that the high level is on and the low level is off. Terminal 40 is connected to the base of transistor 42,
This base is grounded via a resonance element 44. The emitter of the transistor 42 has a capacitor C1 and a resistor R
1, and the collector is connected to the power supply V1 via the load 43 and to the antenna 18. A capacitor C0 is connected between the base and the emitter of the transistor 42.

Here, when the control signal is at the low level, transmission is not performed because the transistor 42 is off. When the control signal is at a high level, the transistor 42 is turned on, and the output of the transistor 42 is oscillated at, for example, a frequency of 2.45 GHz by the resonance element 44 and transmitted from the antenna 18. FIG. 3 is a circuit diagram of the portable device 24 according to the first embodiment. In the drawing, a signal received by an antenna 26 is supplied to a detector 28, where a signal having a frequency of 2.45 GHz is detected. This detection output is amplified by the amplifier 52 in the transmission unit 30 and supplied to the ID generation unit 54. Here, when a signal having a frequency of 2.45 GHz is received, the amplifier 52 outputs a high-level signal, and when no signal is received, the output of the amplifier 52 is at a low level. Note that a comparator may be employed in place of the amplifier 52 to binarize the signal as needed, and then supply the detection output to the ID generation unit 54.

The switch 32 is a normally open switch, and supplies a high level signal from the DC power supply 50 to the ID generator 54 when pressed by the user. ID generator 54
When the high-level signal is supplied from the amplifying unit 52, the additional bit k0 is set to a value of 0, and when the high-level signal is supplied from the switch 32, the additional bit k0 is set to a value of 1 and stored in a built-in register. The data is read out serially and supplied to the base of the transistor 56 together with the additional bit k0.

The identification data is data for specifying the portable device 24, and includes the receiving unit 20 or the body multiplex ECU 1.
0 stores the same identification data. In the identification data, the value 1 is a high level and the value 0 is a low level.
The base of the transistor 56 is grounded via the resonance element 58. The emitter of the transistor 56 is grounded via the capacitor C11 and the resistor R11, the collector is connected to the power supply V1 via the load 57, and the antenna 6
0 is connected to one end. A capacitor C10 is connected between the base and the emitter of the transistor 56.
The other end of the antenna 60 is grounded.

Here, when the identification data is at a low level, no oscillation is performed because the transistor 56 is off. When the control signal is at a high level, the transistor 56 is turned on, and the output of the transistor 56 oscillates at a frequency of, for example, 300 MHz by the resonance element 58 connected between the base of the transistor and the ground, and is transmitted from the antenna 60. That is, this return signal is an AM-modulated wave obtained by AM-modulating a carrier having a frequency of 300 MHz with the identification data.

FIG. 4 is a circuit diagram of a second embodiment of the portable unit 24. In the drawing, a signal received by an antenna 26 is supplied to a detector 28, where a signal having a frequency of 2.45 GHz is detected. This detection output is supplied to an amplifier 52 in the transmission unit 30.
And supplied to the ID generation unit 61. here,
When a signal having a frequency of 2.45 GHz is received, the amplifier 52
Outputs a high-level signal, and when no signal is received, the output of the amplifier 52 is at a low level.

The switch 32 is a normally open switch, and supplies a high-level signal from the DC power supply 50 to the ID generator 61 when pressed by the user. ID generator 61
When the high-level signal is supplied from the amplifying unit 52, the additional bit k0 is set to a value of 0, and when the high-level signal is supplied from the switch 32, the additional bit k0 is set to a value of 1 and stored in a built-in register. The data is read out serially and output together with the additional bit k0.

The identification data is data for specifying the portable device 24, and includes the receiving unit 20 or the body multiplex ECU 1
0 stores the same identification data. The identification data is output with a value of 1 being a high level and a value of 0 being a low level, with an offset of a predetermined voltage. ID generator 61
Is connected to the base of a transistor 56 via a resonance element 62, and is grounded via a varicap diode (variable capacitance diode) 64.
Therefore, the capacitance of the varicap diode 64 changes when the identification data has the value 1 and the value 0. The emitter of the transistor 56 is grounded via the capacitor C21 and the resistor R21, and the collector is connected to one end of the antenna 60. A capacitor C20 is connected between the base and the emitter of the transistor 56. The other end of the antenna 60 is connected to the power supply V1.

Here, the transistor 56 is turned on regardless of whether the identification data is at the low level or the high level, but the load capacitance of the resonance element 62 changes due to the change in the level of the identification data, and the oscillation frequency changes to 300 ± α MHz. Transmitted from the antenna 60. In other words, this return signal is an F-modulated signal obtained by FM-modulating a carrier having a frequency of 300 MHz with the identification data.
This is an M-modulated wave.

FIG. 5 is a circuit diagram of a first embodiment of the receiver 20. In the figure, the signal received by the antenna 22 is passed through a band-pass filter 70, a preamplifier 72, and a band-pass filter 74, and only a signal near a frequency of 300 MHz is extracted, amplified, and supplied to a mixer 76.
The local oscillator 78 generates a local oscillation signal having a frequency of about 300 MHz and supplies it to the mixer 76. The mixer 76 mixes the received signal and the local oscillation signal to obtain an intermediate frequency signal having a frequency of 455 kHz.

This intermediate frequency signal is supplied to a bandpass filter 8.
Unnecessary frequency components are removed at 0, and the amplitude is limited and amplified by a limiter amplifier 82, and then supplied to a detector 84. The detector 84 performs FM detection. The detection output is filtered by a low-pass filter 86 to remove unnecessary high-frequency components, and then compared with a reference level by a comparator 88 to be binarized.
As a result, the identification code transmitted from the portable device 24 is obtained, and is supplied from the terminal 90 to the body multiplexing ECU 10.

FIG. 6 is a circuit diagram of a receiver 20 according to a second embodiment. In the figure, a signal received by the antenna 22 is extracted only through a bandpass filter 100, a preamplifier 102, and a bandpass filter 104 at a frequency near 300 MHz, amplified, and supplied to a mixer 106. The local oscillator 108 generates a local oscillation signal having a frequency of about 300 MHz and supplies the signal to the mixer 106. The mixer 106 mixes the received signal and the local oscillation signal to obtain an intermediate frequency signal having a frequency of 455 kHz.

This intermediate frequency signal is supplied to a bandpass filter 1
Unnecessary frequency components are removed by 10 and the limiter amplifier 11
The signal is amplified by limiting the amplitude at 2. Limiter amplifier 112
After the RSSI (received signal electric field strength) signal output from is removed by the low-pass filter 116 as an AM detection signal, unnecessary high frequency components are removed, and the signal is compared with a reference level by the comparator 118 to be binarized. As a result, the identification code transmitted from the portable device 24 is obtained and supplied from the terminal 120 to the body multiplex ECU 10.

FIG. 7 shows a flowchart of one embodiment of the smart lock process executed by the body multiplex ECU 10.
This process starts upon detecting that a key has been removed from the key cylinder of the vehicle. In FIG. 7, the body multiplexing ECU 10 determines whether or not the smart lock is set in step S10. Here, the smart lock is set / released by the setting switch 12.

If the smart lock has been set in step S10, it is determined in step S12 whether or not the switch 13 has been pressed. If the switch 13 has not been pressed, the smart lock remains set, so the process proceeds to step S14 (get off detection means). Then, it is determined from the signal of the door switch 11 whether the door of the driver's seat has been changed from open to closed. On the other hand, step S12
If the switch 13 is depressed, the smart lock is temporarily released, and the process proceeds to step S16.

If the smart lock has been released in step S10, it is determined in step S18 whether or not the switch 13 has been pressed. If the switch 13 has not been pressed, the smart lock is still released. Is received, and the process proceeds to step S10. On the other hand, step S
If the switch 13 is pressed at 18, the smart lock is temporarily set, so that the process proceeds to step S14 to determine whether or not the door of the driver's seat is changed from open to closed. If the door of the driver's seat has not been closed from open, the process proceeds to step S12.

If the door of the driver's seat is changed from open to closed in step S14, the counter N is reset to 0 in step S20, and a predetermined time (for example, 100 ms) is set in step 22.
Only the transmission request signal ec) is transmitted from the transmitter 16. Next, in step S24, a return signal from the portable device 24 is received. In step S25, the counter N is incremented by one. Thereafter, the identification code of the return signal received in step S26 is stored in the body multiplex ECU 10. It is determined whether or not the identification code matches. If the values do not match, it is determined in step S28 whether the count value of the counter N is less than a predetermined value K (K is, for example, several tens).

If N <K, the process proceeds to step S22, and steps S22, S24, S26 and S28 are repeated. If N ≧ K in step 28, the process is terminated because the return signal from the portable device cannot be received. If the identification code of the return signal received in step S26 matches the identification code stored in the body multiplex ECU 10, the door lock motor 14 is driven and locked in step S30, and the process ends.

In step 16, the counter N is reset to 0, the identification signal is received in step 32, the counter N is incremented by 1 in step S33, and thereafter, the identification of the return signal received in step S34 is performed. It is determined whether the code matches the identification code stored in the body multiplex ECU 10 and whether the additional bit k0 = 1. If this condition is not satisfied, it is determined in step S36 whether the count value of the counter N is less than a predetermined value K (K is, for example, several tens).

If N <K, the flow advances to step S32 to repeat steps S32, S33, S34, and S36. If N ≧ K in step 28, the process is terminated because the return signal from the portable device cannot be received. If the identification code of the return signal received in step S32 matches the identification code stored in the body multiplex ECU 10 and the additional bit k0 = 1, the door lock motor 14 is driven in step S30 to perform locking. , And the process ends.

By the way, the driver who puts the portable device in the breast pocket with the smart lock set has got off, and FIG.
When the vehicle 125 turns back as shown in FIG.
6 is received by the portable device 24, and a return signal is transmitted from the portable device 24. When the return signal is received by the receiver 20, the door is automatically locked. On the other hand, when the driver who puts the portable device in the breast pocket with the smart lock set exits and leaves the vehicle 125 without turning back to the vehicle 125 side as shown in FIG. Of the transmission request signal is less wrapped around, is blocked by the human body, is not received by the portable device 24, and is not received by the portable device 24.
Does not send a return signal so the door is not locked.
In other words, when there is a passenger, even if the driver carrying the portable device leaves the vehicle 125 before the passenger gets off, the vehicle 1
It is possible to prevent the passenger from being locked in the vehicle 125 by locking the 25 door locks.

In a state where the smart lock is not set, the driver presses the switch 13 provided near the handle 130 or the door switch as shown in FIG. 9A, and as shown in FIG. 9B. When the vehicle gets off, when the door is closed, when the vehicle 125 turns to the vehicle 125 side as shown in FIG. 9C, a transmission request signal from the transmitter 16 is received by the portable device 24, and a return signal is transmitted from the portable device 24. When this is received by the receiver 20, the door is automatically locked, and the vehicle can be separated from the vehicle 125 as shown in FIG. 9D. This is usually effective when there are many passengers and the smart lock is not used. However, this time only when both hands are occupied, the user wants to use the smart lock.

In the state where the smart lock is not set, the driver can turn the steering wheel 130 as shown in FIG.
Alternatively, if the user does not press the switch 13 installed near the door switch and gets off as shown in FIG. 10B, the transmission request signal is not transmitted from the transmitter 16 even when the door is closed.
When the switch 32 of the portable device is pressed as shown in FIG. 10C, a return signal of the additional bit k0 = 1 is transmitted from the portable device 24, and this is received by the receiver 20 to automatically lock the door. Then, the vehicle 125 can be separated from the vehicle 125 as shown in FIG. This is effective in a situation where the smart lock is not used because there is usually a passenger.

In the above embodiment, the frequency of the transmission request signal is set to the order of GHz with little wraparound.
Instead of the transmission request signal, the frequency of the return signal may be on the order of GHz with less wraparound. Note that, in the flowchart of FIG. 7, a step of confirming the elapse of a predetermined time may be provided before shifting from step S14 to S20, so that the control start after the driver's seat door is opened to closed may be appropriately delayed. . In that case, a timer means (not shown) is provided in the circuit. It is assumed that the driver's getting off is detected by the end of the time measurement using the timer means.
Thus, the driver can close the driver's seat door in anticipation of the time measured by the timer means, and can eliminate the trouble of keeping the driver's seat door open. It goes without saying that the timer means time setting may be changed by the user as appropriate.

[0036]

As described above, according to the first aspect of the present invention ,
If the driver gets off the vehicle, the door lock is locked after a predetermined time.
It is not necessary to keep the driver's door open.
And troublesomeness can be eliminated. Further, according to the second aspect,
According to the description, prohibition and permission of the operation of the door lock control means.
To temporarily respond to the presence of a passenger, etc.
Thus, the smart lock can be temporarily prohibited or permitted. Ma
According to the third aspect of the present invention, the portable device is connected to the chest pocket.
After the driver in the vehicle gets off the vehicle, turn back to the vehicle side
Allows the door lock to be locked automatically and
If you can confirm it and do not turn to the vehicle side,
The door is locked according to the driver's will without locking the door
Control can be realized.

[0037]

[0038]

[0039]

[0040]

[Brief description of the drawings]

FIG. 1 is a block diagram of the device of the present invention.

FIG. 2 is a circuit configuration diagram of a transmitter.

FIG. 3 is a circuit configuration diagram of the portable device.

FIG. 4 is a circuit configuration diagram of the portable device.

FIG. 5 is a circuit configuration diagram of a receiver.

FIG. 6 is a circuit configuration diagram of a receiver.

FIG. 7 is a flowchart of an embodiment of a smart lock process.

FIG. 8 is a diagram illustrating a smart lock process.

FIG. 9 is a diagram illustrating a smart lock process.

FIG. 10 is a diagram illustrating a smart lock process.

[Explanation of symbols]

 10 Body Multiplexed ECU 11 Door Switch 12 Setting Switch 13 Switch 14 Door Lock Motor 16 Transmitter 18, 22, 26 Antenna 20 Receiver 24 Portable Device 28 Detector 30 Transmitter 32 Switch 54 ID Generator

Continuation of front page (72) Inventor Kazunori Sakai 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-9-132114 (JP, A) JP-A-9-32377 (JP, A) JP-A-8-307952 (JP, A) JP-A-60-164571 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05B 49/00-49/04 B60R 25 / 00 606 E05B 65/12-65/32

Claims (3)

(57) [Claims] A transmitter provided in the vehicle and transmitting a transmission request signal from a transmission antenna; a portable device receiving a signal transmitted from the transmitter and transmitting a return signal; A receiver for receiving a return signal transmitted from the portable device, a door lock control unit for locking a door lock of the vehicle by receiving the return signal with the receiver, and an exit detection unit for detecting the driver getting off the vehicle And a timer means for measuring a predetermined time after detecting the driver's getting off by the getting-off detection means .
From the portable device.
A lock control device for a vehicle , wherein the return signal is received by the receiver and the door lock control means is operated. 2. The locking control device for a vehicle according to claim 1, further comprising: switch means for temporarily switching between prohibition and permission of the operation of the door lock control means. 3. The locking control device for a vehicle according to claim 1, wherein at least one of the transmission request signal and the return signal is set to a frequency of a band with a small wraparound.