JP4556325B2 - Keyless entry system, in-vehicle device and receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, a keyless entry system for controlling a vehicle device having a short-range wireless communication unit, to the vehicle-mounted device及beauty receiver unit.
[0002]
[Prior art]
Recently, it has been considered that a short-range wireless communication system such as Bluetooth (registered trademark) is applied to data communication between various devices such as a mobile phone device and a personal computer. That is, by introducing the short-range wireless communication method, it is not necessary to connect the devices with a communication cable when performing data communication, so that convenience in handling can be improved.
[0003]
In the case where such a short-range wireless communication system is used for control of the in-vehicle device, for example, forms as shown in FIGS. 9 and 10 are conceivable. As an in-vehicle device, specifically, as shown in FIG. 9, a CCD camera used by connecting to a PDA 1, a personal computer 2, a PHS (Personal Handyphone System) 3, a car navigation device 4, an MD player 5, for example, a PHS 3. There is a device 6 or the like.
[0004]
For example, the CCD camera device 6 includes a CCD camera 7, a CCD control unit 8, and a Bluetooth unit 9, as shown in FIG. The CCD camera 7 is used, for example, to transmit image data obtained by imaging the passenger compartment. A control signal transmitted from an external remote controller 10 is given to the CCD controller 8 via the Bluetooth unit 9, To be controlled.
[0005]
The remote controller 10 includes an operation unit 11, a Bluetooth unit 12, a data processing unit 13, and a display unit 14. When a user operates the operation unit 11, a corresponding control signal is transmitted to the 2.4 GHz band via the Bluetooth unit 12. Is transmitted to the CCD camera device 6 as a wireless signal. When the control signal is transmitted from the remote controller 10, the Bluetooth unit 9 on the CCD camera device 6 side closes the power switch 15 to supply power from the vehicle battery (+ B) to the CCD camera 7 and the CCD controller 8. They are supplied and operated.
[0006]
Then, the CCD camera device 6 transmits the image data picked up by the CCD camera 7 to the remote controller 10 side via the Bluetooth unit 9. In the remote controller 10, when the received image data is processed in the data processing unit 13, it is output and displayed on a display unit 14 constituted by, for example, an LCD (Liquid Crystal Display). For example, when a child is made to wait in the vehicle interior, the user can monitor the state of the child by monitoring an image in the vehicle interior captured by the CCD camera device 6 from the outside with the remote controller 10. .
[0007]
[Problems to be solved by the invention]
Assuming the above configuration, it is necessary to always supply power to the Bluetooth unit 7 on the CCD camera device 6 side in order to wait for transmission of a control signal from the remote controller 10. Then, there is a problem that the consumption amount of the battery of the vehicle becomes larger.
[0008]
Further, when the CCD camera device 6 is always in a standby state, when a similar remote controller 10 owned by another person different from the owner of the vehicle is operated near the vehicle, the CCD camera device 6 There is also a possibility that a signal from the remote controller 10 is received and the operation is inadvertently performed.
[0009]
The present invention has been made in view of the above circumstances, and its object is suppressed as much as possible the consumption of a battery of the vehicle, also the keyless entry system can prevent the vehicle apparatus to operate inadvertently, and its death vehicle device used in the stem is to provide a receiver device as well.
[0010]
[Means for Solving the Problems]
According to the keyless entry system of the in-vehicle apparatus according to claim 1, receiver unit receives the signal including a function code transmitter unique ID code from the outside, is stored inside the ID code and its own If the ID code matches the ID code and the function code instructs the short-range wireless communication unit to supply power, the battery power is supplied to the short-range wireless communication unit of the in-vehicle device. To control. When the function code indicates door lock / unlock, the function code is output to a body ECU that controls driving of the on-vehicle equipment. That is, it is not necessary to always supply the battery power in order to operate the in-vehicle device from the outside. Since the battery power is constantly supplied to the receiver in order to make the keyless entry system function, the consumption amount of the battery of the vehicle is not substantially increased.
[0011]
Therefore, even when an in-vehicle device equipped with a short-range wireless communication unit is mounted on a vehicle and can be activated from the outside, it is possible to suppress a decrease in battery capacity as much as possible. Moreover, since the vehicle-mounted device can be used only when the user activates it from the outside, a signal from a product having a similar short-range wireless communication unit is transmitted in the vicinity of the vehicle without the user's intention. Even in this case, the in-vehicle device can be prevented from operating carelessly.
Then, the short-range wireless communication unit requests the receiver to stop supplying power to the receiver when it detects that the control signal for operating the in-vehicle device is not transmitted for a certain period of time after starting the in-vehicle device. Output a signal. Therefore, it is possible to reduce wasteful power consumption by the in-vehicle device that is not substantially used.
[0012]
According to the keyless entry system according to claim 2, when the function code indicates that the short-range wireless communication unit is to be turned off, the receiver supplies power to the short-range wireless communication unit of the in-vehicle device. Therefore, convenience can be further improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a functional block diagram showing the configuration of the keyless entry system 21. The system 21 is mounted on the vehicle side, a transmitter 22 configured to be portable, a receiver 23 that receives a radio signal transmitted from the transmitter 22, and on-vehicle equipment 25 based on information transferred from the receiver 23. It is comprised with body ECU24 which drive-controls.
[0015]
The transmitter 22 is built in a master key 26 used by the user for starting the engine of the vehicle, opening and closing the door (see FIG. 1), and includes an operation switch 27, a control unit 28, a power supply unit 29, a transmission unit 30, and a transmission antenna. 31 is provided. In addition to the general functions such as door lock / unlock, trunk open, car finder for easily finding the vehicle in a large parking lot, and security panic, the user operates the operation switch 27. In addition, a Bluetooth ON / OFF function for starting / stopping a CCD camera device (on-vehicle device) 33 (see FIG. 1) having a Bluetooth unit (short-range wireless communication unit) 32 can also be instructed.
[0016]
When the control unit 28 determines which function instruction has been selected based on the operation signal from the operation switch 27, the control unit 28 transmits a remote control signal including a function code corresponding to the selected function to the code generation unit 28a. Instruct. The code generator 28a adds an ID code unique to the transmitter 22 to the instructed function code and outputs the result to the transmitter 30. Transmission unit 30 includes an oscillation unit 30a, provided with a modulation unit 30b and an amplifying unit 30c, the modulation unit 30b so as to modulate the high frequency signal based oscillation unit 30a outputs the code code generating unit 28a is output It has become. Then, the modulated signal is amplified by the amplifying unit 30c and transmitted to the outside from the transmitting antenna 31 as a remote control signal.
[0017]
On the other hand, the receiver 23 includes a reception antenna 34, a reception unit 35, a demodulation unit 36, a control unit 37, and a communication interface (I / F) 38, and a remote control signal transmitted from the transmitter 22 is received by the reception antenna 34. When the signal is received by the receiver 35 and demodulated by the demodulator 36, it is converted into a digital signal and provided to the controller 37. When the control unit 37 extracts the ID code that can be included in the signal demodulated by the demodulation unit 36, the control unit 37 checks the ID code stored therein, and if they match, it is included in the remote control signal. The function code is output to the body ECU 24 via the communication I / F 38.
[0018]
The body ECU 24 includes a communication I / F 39, a control unit 40, a drive control unit 41, and the like, and the function code output from the receiver 23 is given to the control unit 40 via the communication I / F 39. It has become. Control unit 40 forces out the drive control section 41 an instruction to the vehicle equipped 25 based on the function code given to a predetermined state. The drive control unit 41 outputs a drive signal to the in-vehicle equipment 25 based on the instruction.
[0019]
As shown in FIG. 1, the CCD camera device 33 includes a CCD camera 7, a CCD control unit 8, and a Bluetooth unit 32, as with the CCD camera device 6. Unlike the Bluetooth unit 9 of the CCD camera device 6, the Bluetooth unit 32 is not always supplied with the power of the vehicle battery (+ B), and supplies power to the CCD camera 7 and the CCD controller 8. It is not configured to control. The Bluetooth unit 32 is supplied with battery power through the power switch 42 together with the CCD camera 7 and the CCD controller 8. Opening and closing of the power switch 42 is controlled by the receiver 23 of the keyless entry system 21.
[0020]
Next, the operation of this embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing the control contents of the control unit 37 constituting the receiver 23. The control unit 37 waits until a remote control signal transmitted from the transmitter 22 is received (step S1). When the remote control signal is received (“YES”), it is included in the remote control signal as described above. ID codes that are present are collated (step S2).
[0021]
If the collation result of the ID code is OK in Step S2 (“YES”), the control unit 37 determines whether or not the function code included in the remote control signal is “Bluetooth ON / OFF” (Step S2). S3). If the function code is not “Bluetooth ON / OFF” (“NO”), processing according to another function is performed (step S4). That is, a function code is output to the body ECU 24 in order to execute processing such as door lock / unlock, trunk open, car finder, and panic, which are functions of a normal keyless entry system. Then, the process proceeds to step S1.
[0022]
On the other hand, when the function code is “Bluetooth ON / OFF” in Step S3 (“YES”), the control unit 37 determines whether or not the power switch 42 is open (OFF) at that time (Step S3). If it is in the open state (“YES”), an ON process for closing the power switch 42 is performed (step S6) and the process returns to step S1. If the power switch 42 at that time is in the closed state (ON) ("NO"), an OFF process for opening the power switch 42 is performed (step S7), and the process returns to step S1.
[0023]
Therefore, when the initial state of the power switch 42 is OFF, when the user operates the transmitter 22 of the keyless entry system 21 and transmits a remote control signal instructing the “Bluetooth ON / OFF” function, the CCD camera device 33 is notified. Is supplied with battery power and can be operated by the remote controller 10. That is, when the Bluetooth unit 32 of the CCD camera device 33 receives a remote control signal transmitted from the remote controller 10, it outputs an operation signal to the CCD controller 8 to operate the CCD camera 7. For example, operations such as changing the viewing angle of the camera and zooming up / down can be performed.
[0024]
Further, as described above, the user can monitor the state of the passenger compartment by receiving the image data captured by the CCD camera 7 with the remote controller 10 and outputting and displaying the image data on the display unit 14. Alternatively, the state around the vehicle can be monitored if the line of sight of the CCD camera 7 is directed to the outside of the vehicle. For example, when the user is at home and the vehicle is on the road, the user can know the weather such as whether it is raining without going outside.
[0025]
As described above, according to the first embodiment, when the receiver 23 of the keyless entry system 21 mounted on the vehicle receives a remote control signal instructing the “Bluetooth ON / OFF” function from the transmitter 22, the CCD 23 Battery power is supplied to each part of the camera device 33.
[0026]
That is, in order to operate the CCD camera device 33 with the remote controller 10, it is not necessary to always supply the battery power. Since the battery 23 is always supplied with power to the receiver 23 in order to make the keyless entry system 21 function, the consumption amount of the battery of the vehicle is not substantially increased. Therefore, even when the CCD camera device 33 is mounted on a vehicle, a reduction in battery capacity can be suppressed as much as possible.
[0027]
Further, since the CCD camera device 33 can be used only when the user is activated by the transmitter 22, an operation signal not intended by the user is transmitted when another person operates the same remote controller 10 in the vicinity of the vehicle. Even in such a case, it is possible to prevent the CCD camera device 33 from inadvertently operating.
[0028]
Further, according to this embodiment, the receiver 23 is in a state where the CCD camera device 33 is activated when a remote control signal instructing the “Bluetooth ON / OFF” function is transmitted from the transmitter 22. Since the power supply of the battery is stopped, the transmitter 22 can also perform stop control of the CCD camera device 33, and convenience can be improved.
[0029]
(Second embodiment)
FIG. 4 shows a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Only different parts will be described below. In the second embodiment, two sets of CCD camera devices 33 (1) and 33 (2) are arranged in the vehicle, and a power switch 42 (1) is connected to each power supply terminal of these CCD camera devices 33. ), 42 (2), the battery power of the vehicle is supplied.
[0030]
Then, when the receiver 23A receives the function code “Bluetooth ON / OFF” as in the first embodiment, it simultaneously opens and closes the power switches 42 (1) and 42 (2).
According to the second embodiment configured as described above, even when there are a plurality of CCD camera devices 33, the same effects as in the first embodiment can be obtained.
[0031]
(Third embodiment)
FIG. 5 shows a third embodiment of the present invention. The same parts as those of the second embodiment are denoted by the same reference numerals and the description thereof is omitted. Only different parts will be described below. In the third embodiment, two sets of CCD camera devices 33 (1) and 33 (2) are arranged in the vehicle as in the second embodiment, but the receiver 23B has power switches 42 (1) and 42 ( The opening and closing of 2) can be controlled independently.
[0032]
Therefore, when the receiver 23B receives the function code “Bluetooth ON / OFF” as in the first embodiment, the receiver 23B controls the power switches 42 (1) and 42 (2) to be opened and closed sequentially, or transmits them. If the machine 22 is configured to selectively operate the CCD camera devices 33 (1) and 33 (2) with the operation switch 27, they can be individually activated or deactivated.
According to the third embodiment configured as described above, when there are a plurality of CCD camera devices 33, their activation and deactivation can be individually controlled. Moreover, the maximum value of inrush current can be reduced by starting individually.
[0033]
(Fourth embodiment)
FIGS. 6 to 8 show a fourth embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and only different parts will be described below. In the fourth embodiment, a receiver 43 is arranged instead of the receiver 23 of the first embodiment, and a Bluetooth unit (short-range wireless communication unit) 44 is arranged instead of the Bluetooth unit 32. The Bluetooth unit 44 is configured to be able to output a power supply stop request to the receiver 43. The receiver 43 is configured to open the power switch 42 when receiving a power supply stop request.
[0034]
FIG. 7 is a flowchart showing the control contents on the Bluetooth unit 44 side.
In a piconet that is a Bluetooth communication network formed between the remote controller 10 and the CCD camera device (on-vehicle device) 45, the remote controller 10 side is a master and the CCD camera device 45 side is a slave. The CCD camera device 45 stands by in the “standby phase” until the remote controller 10 transmits an IQ packet for “inquiry” as a remote control signal (step A1).
[0035]
When the Bluetooth unit 44 of the CCD camera device 45 receives the remote control signal (step A1, “YES”), processing corresponding to the received remote control signal is performed (step A4). That is, an operation signal is output to the CCD controller 8 to operate the CCD camera 7. When the Bluetooth unit 44 disconnects the communication link with the remote controller 10 and returns to the “standby phase”, the Bluetooth unit 44 resets and starts the internal timer (step A5) and proceeds to step A1.
[0036]
After that, when the Bluetooth unit 44 does not receive the remote control signal, the Bluetooth unit 44 remains in the “standby phase” while going through the loop of steps A1 and A2 until the timer that is reset and started in step A5 counts a predetermined time. . When the predetermined time has elapsed (step A2, “YES”), the Bluetooth unit 44 outputs a power supply stop request to the receiver 43 (step A3) and returns to step A1.
[0037]
Then, as shown in FIG. 8, the receiver 43 confirms the input of the power supply stop request output from the Bluetooth unit 44 (step S8, “YES”), and proceeds to step S7 to open the power switch 42. The battery power is not supplied to the CCD camera device 45, and the operation is stopped.
[0038]
As described above, according to the fourth embodiment, after the Bluetooth unit 44 once activates the CCD camera device 45 and detects that the remote control signal of the remote controller 10 is not transmitted for a certain period of time, the Bluetooth unit 44 supplies power to the receiver 43. Since the supply stop request is output, useless power consumption by the CCD camera device 45 that is not substantially used can be reduced.
[0039]
The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following modifications or expansions are possible.
In the second or third embodiment, there may be three or more in-vehicle devices, or in-vehicle devices each having a different function.
When a wireless signal for starting the in-vehicle device is transmitted from the outside, it is not always necessary to supply the battery power to all of the in-vehicle devices, the battery power is supplied only to the short-range wireless communication unit, The power of the battery may be supplied to the component by operating the short-range wireless communication unit.
In the fourth embodiment, the power supply of the battery to be stopped when the Bluetooth unit 44 outputs a power supply stop request to the receiver 43 does not necessarily have to be the entire CCD camera device 45, and short-range wireless communication Only the power supply of the battery to the unit may be stopped.
[0040]
The switches in the operation unit 11 of the transmitter 22 may be only (1) door lock / unlock and (5) Bluetooth ON / OFF. Further, for example, a remote control signal instructing the “Bluetooth ON” or “Bluetooth OFF” function may be separately transmitted according to a change in the ON operation time of one switch in the operation unit 11. Further, a separate switch for transmitting each remote control signal separately may be arranged.
The in-vehicle device is not limited to the CCD camera device, and may be, for example, an MD player or a car navigation device. When the in-vehicle device is an MD player, for example, before the user gets on the vehicle, the music data that the user wants to listen to can be transmitted and written to the MD in the MD player. When the in-vehicle device is a car navigation device, map data of an area to be driven can be transmitted and written to a memory card set in the car navigation device or a built-in hard disk.
[0041]
Further, what communicates with the in-vehicle device from the outside is not limited to the remote controller 10, but may be a mobile phone device, a PDA (Personal Digital Assistant), a personal computer or the like provided with a short-range wireless communication unit. For example, in the case of a mobile phone device having a communication function such as i-mode (registered trademark of NTT Mobile Communications Network Co., Ltd.), information acquired in i-mode is transmitted to the in-vehicle device for display. Can do. Further, when a GPS unit is mounted on a mobile phone device or the like, when the occupant moves out of the vehicle and acts by carrying the mobile phone device, the position information acquired by the GPS unit is mounted on the vehicle such as the car navigation system. It can also be received by the device and its position displayed on a map.
The short-range wireless communication unit is not limited to the one using Bluetooth, but may adopt another short-range wireless communication method.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a configuration of a control system of a CCD camera device according to a first embodiment of the present invention. FIG. 2 is a functional block diagram showing a configuration of a keyless entry system. FIG. 4 is a flowchart corresponding to FIG. 1 illustrating a second embodiment of the present invention. FIG. 5 is a diagram corresponding to FIG. 1 illustrating a third embodiment of the present invention. 4 is a diagram corresponding to FIG. 1 showing the embodiment. FIG. 7 is a flowchart showing the control contents of the Bluetooth unit built in the CCD camera device. FIG. 8 is a diagram equivalent to FIG. 3. FIG. [Fig. 10] Fig. 1 equivalent [Explanation of symbols]
21 is a keyless entry system, 23, 23A, and 23B are receivers, 32 is a Bluetooth unit (short-range wireless communication unit), 33 is a CCD camera device (on-vehicle device), 44 is a Bluetooth unit (short-range wireless communication unit), 45 Indicates a CCD camera device (on-vehicle device).

Claims (4)

An in-vehicle device including a plurality of CCD camera devices, an MD player, and a car navigation device that includes a short-range wireless communication unit and is configured to be able to communicate with the outside via the short-range wireless communication unit;
A remote controller that transmits a control signal to the in-vehicle device, has a communication function as a mobile phone device incorporating a GPS unit, and has a short-range wireless communication unit and a display unit;
Locking of the vehicle based on radio signals transmitted from the transmitter, and a receiver for a keyless entry system used to carry out the unlocking or the like,
The receiver receives the signal containing from the transmitter with the transmitter unique ID code and function code, matches it to a ID code stored in the interior of the ID code with its own, both one If the function code instructs to supply power to the short-range wireless communication unit, the short-range wireless communication unit of the in-vehicle device is controlled to supply power to the battery. / When unlocking is instructed, the function code is output to the body ECU that controls driving of the in-vehicle equipment .
When the remote controller receives the image data transmitted from the CCD camera device, the remote controller displays the image data on the display unit, transmits music data to the MD player, and maps the area to be driven to the car navigation device. Transmitting data, transmitting the information acquired by the mobile phone device by i-mode (registered trademark) and the position information acquired by the GPS unit to the car navigation device,
When the short-range wireless communication unit detects a state in which a control signal for operating the in-vehicle device is not transmitted for a certain period of time after starting the in-vehicle device, it requests the receiver to stop supplying power to the battery. A keyless entry system characterized in that a signal to output is output . The receiver controls the power supply of the battery to the short-range wireless communication unit of the in-vehicle device to be stopped when the function code instructs the power-off of the short-range wireless communication unit. The keyless entry system according to claim 1. An in-vehicle device used in the keyless entry system according to claim 1 or 2. A receiver used for the keyless entry system according to claim 1 or 2.

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