JP2007022178A - Anti-theft device for vehicle, and permeability controlling method for vehicle window - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-theft device for vehicle which increases vehicle theft prevention effects by making variable the visible light permeability of a window which is provided on the vehicle. <P>SOLUTION: An ID signal which is transmitted from an intelligent key 1 when a door lock command is received by a receiving section 22 and is demodulated, and the ID information is input from the receiving section 22 to a control section 23. The control section 23 collates the input ID information with a stored registered ID, and when they agree to each other, the control section 23 transmits the ID information to an alarm control unit 3. At a control section 33 of the alarm control unit 3, whether the ID information and the registered ID agree to each other is judged, and when they agree, a command is transmitted to a window control unit 4. Then, the visible light permeability of a window glass 5 is reduced to a degree in which the inside of the cabin is invisible from the outside of the automobile. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle antitheft device that improves the vehicle theft deterrent effect by changing the light-visible light transmittance of a window provided in the vehicle.

  2. Description of the Related Art Conventionally, as a vehicle antitheft device, there is known a theft alarm device that activates an in-vehicle horn or headlamp when a door, a trunk lid, or the like is opened by an inappropriate means (for example, Patent Document 1). reference).

JP-A-9-109838

  However, the above-described theft alarm device is a device provided for countermeasures after the theft has occurred, and is effective in preventing theft behavior even though it has a notification effect of theft occurrence. There was a problem that the effect was low.

  An antitheft device for a vehicle according to the present invention includes a window having a variable visible light transmittance and a door state detecting means for detecting a locked / unlocked state of a door provided in the vehicle, and is locked by the door state detecting means. Is detected, the visible light transmittance of the window is lowered by the transmittance control means to make the window invisible in the vehicle.

  According to the present invention, when the vehicle door is in the locked state, the visible light transmittance of the window is lowered to make the window invisible in the vehicle. Improvements can be made.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention, and is a block diagram showing a schematic configuration of a vehicle antitheft device. The vehicle antitheft device according to the present invention is configured to turn on / off the antitheft function in conjunction with locking / unlocking of the vehicle door. The block diagram of FIG. 1 shows the case of a vehicle equipped with an intelligent key system. A window with a portable intelligent key 1, an intelligent key unit 2, an alarm control unit 3, a window control unit 4, and a liquid crystal panel. It is made of glass 5 for use.

  The intelligent key system performs ID verification by bidirectional communication between the portable intelligent key 1 and the in-vehicle intelligent key unit 2 to lock and unlock the vehicle door (door lock function) and start and stop the engine (engine Start function). As a result of the ID collation, when the ID stored in the intelligent key 1 and the ID registered in the intelligent key unit 2 match, the door lock function and the engine start function are enabled.

  The intelligent key unit 2 includes a receiving unit 21 that receives and demodulates a signal from the intelligent key 1, and a transmitting unit 22 that transmits a request signal to the intelligent key 1. Information received and demodulated by the receiving unit 21 is sent to the control unit 23 that controls the intelligent key unit 2 and stores data. The control unit 23 stores the registration ID, collates the received ID with the registration ID, controls the reception unit 21 and the transmission unit 22, and the like.

  The ID collation result is input to the input unit 31 of the alarm control unit 3 via the output unit 24. The ID collation result input to the input unit 31 is sent to the control unit 32 that controls various alarm units provided in the vehicle and stores data. In the example shown in FIG. 1, as one of the alarm units, an alarm composed of a window glass 5 having a variable visible light transmittance and a window control unit 4 for controlling the visible light transmittance of the window glass 5. A unit is shown. As another alarm unit, there is an alarm unit which operates a horn or a hazard lamp mounted on a vehicle as in the conventional case.

  In the case of the intelligent key system according to the present embodiment, a keyless entry function that can lock and unlock the vehicle door by operating a remote control button provided on the intelligent key 1 is also provided. A signal transmitted from the intelligent key 1 by operating the remote control button is received by the receiving unit 33 provided in the alarm control unit 3. The receiving unit 33 demodulates the received signal and transfers the demodulated data to the ID verification unit 34.

  The ID collation unit 34 collates the ID information included in the data transferred from the reception unit 33 and the registered ID stored in the control unit 32, and sends the collation result to the control unit 32. The intelligent key 1 incorporates a mechanical key having ID information, and the mechanical key can be used to lock and unlock the door. When the mechanical key is inserted into the key cylinder SW6, the ID information of the mechanical key is read and sent to the input unit 31. The ID information is transferred from the input unit 31 to the control unit 32 and compared with the stored registration ID.

  The control unit 32 transmits a transmittance change command to the input unit 41 of the window control unit 4 via the output unit 35 based on the ID collation result. The input unit 41 sends the transmittance change command input from the alarm control unit 3 to the control unit 42. The control unit 42 controls the drive circuit 43 to change the visible light transmittance of the liquid crystal panel used for the window glass 5.

  In the present embodiment, a liquid crystal panel is used as the transmittance variable member, and the visible light transmittance of the window glass 5 is changed by changing the voltage applied to the liquid crystal panel by the drive circuit 43. For example, polymer dispersed liquid crystal is used for the liquid crystal panel. When no voltage is applied, the liquid crystal molecules are random because they are random, and when a voltage is applied, the liquid crystal molecules are aligned in the direction of the electric field and become transparent. . In addition to the liquid crystal panel, electrochromic glass or the like can also be used as the transmittance variable member that can electrically change the visible light transmittance.

<Operation description>
FIG. 2 is a flowchart for explaining a schematic procedure of the alarm setting operation. In step S1, it is determined whether or not an alarm set condition is satisfied. If it is determined that the condition is satisfied, the process proceeds to step S2, and if it is determined that the condition is not satisfied, step S2 to step S6 are skipped and the alarm is skipped. The set operation process ends. If there is no operation of intelligent key 1 or mechanical key, NO is determined in step S1, no alarm operation is performed, and the process is terminated.

  On the other hand, when intelligent key 1 or mechanical key is operated, the control up to ID verification is either (a) door lock by intelligent key function performed by request switch operation of intelligent key 1, or (b) intelligent key. Depending on whether it is a door lock by the keyless entry function performed by the operation of the remote control switch (door lock switch) 1 or (c) a door lock by a mechanical key, it is finally checked against the registered ID, If it is determined that the IDs match, the process proceeds to step S2. On the other hand, if it is determined that the IDs do not match, the process ends without performing the alarm setting.

  The control in each of the cases (a) to (c) will be described later, and the description of the flow in FIG. 2 will be continued. When proceeding from step S1 to step S2, an alarm function is set. The alarm function has multiple functions. As in the past, the in-vehicle horn and hazard lamps are operated to issue a theft alarm, and the window glass 5 has a low visible light transmittance to reduce theft. It has a function to suppress. In step S2, these alarm functions are set. When the alarm function is set, an alarm operation using a horn or a hazard lamp is activated if the door is opened in an unauthorized manner.

  If the alarm function is set in step S2, the process proceeds to step S3 to perform an alarm operation related to the window glass 5. That is, the applied voltage is controlled by the drive circuit 43 to change the visible light transmittance of the window glass 5 to the visible light transmittance in the alarm set state. In the present embodiment, the visible light transmittance is very high (hereinafter referred to as a transparent state, for example, set to about 90% transmittance), and the visible light that makes it difficult to see inside the vehicle from the outside. A case where the light transmittance can be set to two states (hereinafter, referred to as an opaque state, for example, set to about 20% transmittance) will be described as an example.

  That is, when the process proceeds from step S1 to step S2, the alarm setting condition is satisfied, so that the window glass 5 is in an opaque state. On the other hand, when the alarm is not set, that is, when the alarm set condition is not satisfied, such as when the user is in the vehicle or when the user instructs to unlock the door, The glass 5 is made transparent.

  In a succeeding step S4, it is determined whether or not an alarm reset condition is satisfied. If there is an unlock instruction by the operation of the intelligent key 1 or the mechanical key, and the ID at that time coincides with the registered ID, it is determined that the alarm reset condition is satisfied. As a result, the process proceeds from step S4 to step S5 to cancel the alarm function, and further proceeds to step S6 to switch the visible light transmittance of the window glass 5 from the opaque state to the transparent state. On the other hand, if it is determined in step S4 that the alarm reset condition is not satisfied, step S5 and step S6 are skipped, and the series of processing ends.

  If it is determined in step S1 that the alarm setting condition is satisfied, a signal instructing locking is sent from the control unit 32 to a control unit (not shown) that controls locking / unlocking of the door, in addition to the alarm function described above. Sent and the door is locked. Similarly, if it is determined in step S1 that the alarm reset condition is satisfied, the door is unlocked.

<< Description of ID verification operation >>
Next, detailed control for determining whether the alarm set condition is satisfied and whether the alarm set condition is not satisfied will be described.
(A) Door Lock / Unlock by Intelligent Key Function FIG. 3 is a flowchart showing control in the case of the intelligent key function, and the processing from step S11 to step S14 is performed by the control unit 23 of the intelligent key unit 2. The processes after step S15 are performed by the control unit 33 of the alarm control unit 3. When the user operates a request switch provided on the intelligent key 1, a signal notifying that the request switch has been operated is transmitted from the intelligent key 1. In step S11, it is determined whether or not the signal is received by the receiving unit 21, and if it is determined that the signal has been received, the process proceeds to step S12.

  In step S12, a request signal is transmitted from the transmission unit 22 to the intelligent key 1, and the position of the intelligent key 1 is confirmed. When the intelligent key 1 receives the request signal, it transmits an ID signal. In step S13, it is determined whether or not the ID signal transmitted from the intelligent key 1 has been received by the receiving unit 21, and if it is determined that the ID signal has been received, the process proceeds to step S14. In step S <b> 14, the ID signal received by the receiving unit 21 is collated with a pre-registered ID. If they match, the ID information is transmitted to the alarm control unit 3.

  In step S15, the ID information input from the intelligent key unit 2 is checked against the registered ID stored in the control unit 23 (the same as that stored in the control unit 23) to determine whether or not they match. To do. If it is determined in step S15 that they match, the process proceeds to step S16. If it is determined that they do not match, the process proceeds to step S19. If the ID information is not input from the intelligent key unit 2, it is determined in the same manner as the mismatch, and the process proceeds to step S19.

  When the process proceeds from step S15 to step S16, it is determined in step S16 whether or not the vehicle is in a door lock state. If it is determined in step S16 that the door is locked, the process proceeds to step S17 and it is determined that the alarm reset condition is satisfied. Conversely, if it is determined in step S16 that the door is not locked (NO), the process proceeds to step S18, where it is determined that the alarm set condition is satisfied.

  On the other hand, if it is determined in step S15 that they do not match and the process proceeds to step S19, it is determined in step S19 whether or not the vehicle is in a door lock state. If it is determined in step S19 that the door is locked, the process proceeds to step S20 and it is determined that the alarm reset condition is not satisfied. Conversely, if it is determined in step S19 that the door is not locked but is unlocked (NO), the routine proceeds to step S21, where it is determined that the alarm set condition is not satisfied. In step S1 or step S4 of FIG. 2 described above, processing as shown in FIG. 3 is executed.

(B) Case of Door Lock / Unlock by Keyless Entry Function FIG. 4 is a flowchart showing details of determination processing in the case of lock, that is, details of step S1 of FIG. Indicates the process to be executed. When the user operates a door lock remote control switch provided on the intelligent key 1, a signal for instructing door lock and an ID signal are transmitted from the intelligent key 1. In step S31, it is determined whether or not the signal transmitted from the intelligent key 1 has been received by the receiving unit 33. If it is determined that the signal has been received, the process proceeds to step S32.

  In step S32, the ID signal received by the receiving unit 33 is collated with an ID registered in advance. In step S33, it is determined whether or not the IDs match as a result of the ID collation in step S32. If it is determined in step S33 that there is a match, the process proceeds to step S34 and it is determined that the alarm set condition is satisfied.

  In the case of the keyless entry function, when the door is locked, the remote control switch is separately used for locking and unlocking. Therefore, when the remote control switch for unlocking is operated, processing similar to that for locking is executed. When the IDs match, it is determined that the alarm reset condition is satisfied, and when the IDs do not match It is determined that the alarm reset condition is not satisfied.

(C) In case of door lock / unlock by mechanical key In case of door lock / unlock by mechanical key, when the mechanical key is inserted into the key cylinder of the door and lock operation or unlock operation is performed, the ID is received from the mechanical key. The ID signal is read and sent from the key cylinder switch 6 to the input unit 31 of the alarm control unit 3.

  The subsequent processing is the same as the processing from step S32 to step S35 in FIG. 4. When the IDs match, it is determined that the alarm reset condition is satisfied, and when the IDs do not match, the alarm reset condition is not satisfied. Determined. When the control unit 32 detects that the key cylinder switch 6 has been turned on from off, a signal instructing the lock is sent from the control unit 32 to the control unit that controls the locking / unlocking of the door. Is locked.

  As described above, in the present embodiment, since the window glass 5 is opaque when the door is locked, there is an effect of suppressing the objection act by the suspicious person, and as a result, theft can be prevented. . Further, when the door is locked / unlocked, it is possible to prevent the lock from being released by an unauthorized lock release means by performing ID verification.

  In the embodiment described above, the window glass 5 is made opaque when the IDs match with reference to the ID signal when the door is locked, but the ID verification may be omitted. That is, if the door is locked, the window glass 5 is made opaque. However, at the time of unlocking, in order to prevent fraud, the alarm function is reset only when the ID is matched and the ID matches, and the visible light transmittance of the window glass 5 is changed from the opaque state to the transparent state. Try to switch.

  In the above-described embodiment, the intelligent key system has been described as an example. However, the keyless entry system that locks and unlocks the door using a remote control, or the system that locks and unlocks the door only with a mechanical key. The present invention is also applicable.

  In the correspondence between the embodiment described above and the elements of the claims, the control units 23 and 33 are door state detection means, release action detection means, storage means and determination means, and the window control unit 4 is transmittance control means. Respectively. The above description is merely an example, and when interpreting the invention, there is no limitation or restriction on the correspondence between the items described in the above embodiment and the items described in the claims.

1 is a diagram illustrating an embodiment of the present invention, and is a block diagram illustrating a schematic configuration of a vehicle antitheft device. It is a flowchart explaining the schematic procedure of an alarm setting operation | movement. It is a flowchart which shows the detail of the process which determines whether alarm set conditions are satisfied, and shows the case of an intelligent key function. It is a flowchart which shows the detail of the process which determines whether alarm set conditions are satisfied, and shows the case of a keyless entry function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable intelligent key 2 Intelligent key unit 3 Alarm control unit 4 Window control unit 5 Window glass 21, 32 Reception part 22 Transmission part 23, 33, 42 Control part 34 ID collation part

Claims (5)

A window with variable visible light transmittance;
Door state detecting means for detecting a locked / unlocked state of a door provided in the vehicle;
When the door state detection means detects a locked state, the vehicle further comprises a transmittance control means for reducing the visible light transmittance of the window so that the window cannot be seen inside the vehicle. Anti-theft device. The vehicle antitheft device according to claim 1,
Provided with an unlocking action detecting means for detecting an unlocking action by the vehicle-designated unlocking means,
When the unlocking action is detected by the unlocking action detecting means, the transmittance control means increases the visible light transmittance of the window and switches the window from the in-vehicle invisible state to the transparent state. A vehicle antitheft device. The vehicle antitheft device according to claim 2,
Storage means for storing reference identification information in advance;
Determining means for determining whether the unique identification information of the unlocking means and the reference identification information match,
The anti-theft device for vehicles according to claim 1, wherein the transmittance control means switches the window from the in-vehicle invisible state to the transparent state only when the determination means determines that they match. In the vehicle antitheft device according to any one of claims 1 to 3,
The window is composed of a liquid crystal panel,
The vehicle antitheft device, wherein the transmittance control means changes the visible light transmittance by changing a voltage applied to the liquid crystal panel. A method for controlling the transmittance of a vehicle including a window having a variable visible light transmittance,
Whether the door of the vehicle is locked or unlocked is detected, and when the locked state is detected, the visible light transmittance of the window is lowered to make the window invisible in the vehicle. Transmission control method.

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