JP2014031101A - Theft alarm device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a theft alarm device with improvements in convenience and user friendliness.SOLUTION: A theft alarm device 1 includes: alarm means for issuing an alarm in a case where a reference period of time has elapsed since a voltage of a power source of a vehicle reaches a predetermined voltage or less; and failure display means to display a failure of the power source at turning on an ignition of the vehicle in a case where a period of time from when the power source reaches the predetermined voltage or less to when the power source exceeds the predetermined voltage is shorter than a predetermined period that is shorter than the reference period.

Description

  The present invention relates to a burglar alarm device for appropriately preventing a burglary when a burglary occurs in a vehicle.

  Various devices for preventing theft when a vehicle is parked have been proposed. For example, in Patent Document 1 below, considering that a battery removal operation is performed at the time of theft, it is determined that the theft has occurred when the power supply from the battery is stopped for a certain reference time or more, and an alarm is generated. It has been proposed. More specifically, it has been proposed that a timer is operated from the time of stopping power supply, and an alarm is generated when the time until the microcomputer is restarted is longer than a reference value.

JP 2000-033855 A

  However, in this prior art, when the time from the stop point to the restart is shorter than the reference time, it is not possible to guide the user what kind of problem is occurring in the vehicle. There was a problem that user-friendliness could not be secured because it was not considered enough.

  In view of the above problems, an object of the present invention is to provide a burglar alarm device that is more convenient and user friendly.

In order to solve the above problem, the burglar alarm device according to the present invention is:
An alarm means for issuing an alarm when a power supply voltage of a vehicle power supply is lower than a predetermined voltage and a reference time elapses; and a time from when the power supply becomes lower than the predetermined voltage until the power exceeds the predetermined voltage And a failure display means for displaying a failure of the power supply when the vehicle is turned on when the time is shorter than a predetermined time shorter than the time.

  Here, the predetermined time is an increase characteristic of the power supply voltage after the load mounted on the vehicle is stopped due to a drop of the power supply voltage across the predetermined voltage, and the power supply necessary for theft of the vehicle. It may be determined based on the removal time. Further, the failure display means may perform the failure display by lighting an indicator in the vehicle. Moreover, in the said case, it is good also as notifying means which notifies a user of the failure of the said power supply via a center.

  ADVANTAGE OF THE INVENTION According to this invention, the burglar alarm apparatus which can implement | achieve more user-friendly failure display can be provided.

It is a schematic diagram which shows one Embodiment of the burglar alarm apparatus 1 of Example 1 which concerns on this invention. It is a schematic diagram which shows the aspect of determination of the battery instantaneous interruption determination threshold value (predetermined time) in the theft alarm device 1 of Example 1. FIG. It is a flowchart which shows the control content of the burglar alarm apparatus 1 of Example 1. FIG. It is a schematic diagram which shows the control content of the burglar alarm apparatus 1 of Example 1. FIG. It is a schematic diagram which shows the control content of the burglar alarm apparatus 1 of Example 1. FIG. It is a schematic diagram which shows one Embodiment of the burglar alarm apparatus 1 of Example 2 which concerns on this invention. It is a flowchart which shows the control content of the burglar alarm apparatus 1 of Example 2. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the burglar alarm device 1 according to the first embodiment includes a vehicle battery 2 (power source), a control unit 3, an alarm device 4, and an indicator 5. The control unit 3 is, for example, a main body ECU (Electronic Control Unit), and includes, for example, a CPU, a ROM, a RAM, a data bus for interconnecting them, and an input / output interface, and follows a program stored in the ROM. Each control described below is performed to constitute an alarm means and a failure display means.

  The control unit 3 is connected to other ECUs such as a smart ECU (not shown) constituting a smart entry system in the vehicle via a CAN (Controller Area Network), for example, and can transmit and receive and communicate with each other. It is supposed to be. The controller 3 is connected to a door courtesy switch, a lock position switch, and a mechanical key switch (not shown). As shown in FIG. 1, the control unit 3 appropriately acquires “door courtesy signal”, “door lock position signal”, “lock / unlock signal by wireless / smart function”, “time information”, and “ignition on / off” from these connection targets. To do.

  When the control unit 3 detects the door lock state from the “door lock position signal”, the control unit 3 shifts the internal status (alarm state) from the “non-warning state” to the “warning preparation state”, and after a few seconds, enters the “warning state”. Transition.

  When the control unit 3 detects the door opening and door unlocking from the “door courtesy signal” and “door lock position signal”, the control unit 3 determines that there has been an unauthorized intrusion by a thief, and shifts to an alarm state. Drive lamps and speakers, output warning sound and warning light, threaten thieves. When the control accompanying the threat is performed, the control unit 3 stores the alarm state and time information in the internal nonvolatile memory.

  The control unit 3 acquires + B power from the vehicle battery 2, and the battery voltage V (power supply voltage) of the + B power decreases due to deterioration of the vehicle battery 2, and the reset voltage VR is reduced as shown in FIG. When it falls below, it shifts to the operation stop state. Also in this case, the control unit 3 stores the immediately preceding time information in the nonvolatile memory.

  In this case, other ECUs that are loads of the vehicle battery 2 similarly shift to the operation stop state, so that the battery voltage V once reverses and then rises again as shown in FIG. 2A. Eggplant. When the battery voltage V rises again and reaches the reset voltage VR (predetermined voltage), the alarm state of the control unit 3 shifts from an operation stop state to a warning state (reset start) as shown in FIG.

  Here, the control unit 3 calculates a difference Δt between the reset start time and the time when the operation is stopped as shown in FIG. 2A, and this difference Δt is a predetermined time T (battery instantaneous interruption determination threshold). If it is less than that, as shown in FIG. 2 (c), it is determined that there is a vehicle battery instantaneous interruption state (failure state exists), and this is stored.

  When the control unit 3 receives “ignition on”, the control unit 3 determines that the ignition is on and lights the indicator 5 to display a failure to the user. Here, the predetermined time T is determined based on the method shown in FIG. 3 based on the change characteristics of the battery voltage V accompanying the deterioration of the vehicle battery 2 described above.

  That is, the predetermined time T is necessary for the rising characteristic of the power supply voltage after the load mounted on the vehicle due to the drop across the reset voltage VR (predetermined voltage) of the battery voltage V (power supply voltage) and the vehicle theft. This is determined based on the removal time of the vehicle battery 2 (power supply).

  More specifically, the time difference X from the time when the battery voltage V falls below the reset voltage VR to the time until the battery voltage V reaches the reset voltage VR again as shown in FIG. Obtained for a plurality of vehicle batteries 2, as shown in FIG. 3B, a normal distribution and variance σ are obtained with the value of X as the horizontal axis and the frequency as the vertical axis. In FIG. 3B, if the broken line at the center is the average value of X, for example, a value obtained by adding a margin to the average value plus 3σ, which is longer than the removal time s required for theft. The predetermined time T is determined to a short value. The time difference X due to the deterioration of the vehicle battery 2 is currently about several hundreds msec, and the removal time s required for the theft is about several minutes.

  Here, the change mode of the battery voltage V when the vehicle battery 2 is removed is stepped as shown in FIG. In other words, when the battery is removed, the battery voltage V changes to zero in a stepped manner, falls below the reset voltage VR at that time, and the alarm state of the control unit 3 is a warning state as shown in FIG. Shifts to the operation stop state. Here, when the attachment is performed again after the removal time s of about several minutes has elapsed, the battery voltage V returns to a step shape, and at the same time, the control unit 3 starts resetting and shifts to a warning state.

  Here, the control unit 3 calculates a difference Δt between the reset start time and the time when the operation has been stopped, and the difference Δt is calculated for a predetermined time T (battery instantaneous interruption determination) as shown in FIG. If it is not less than the threshold value), that is, if it is equal to or longer than the predetermined time T, it shifts to a warning state and simultaneously shifts to a warning state, and drives a lamp or speaker outside the vehicle not shown in FIG. Then threaten the thief. In the change mode of the battery voltage V accompanying the removal as shown in FIG. 4A, the vehicle instantaneous interruption state is not shifted to “present” as shown in FIG. 4C.

  Hereinafter, the control contents of the portion according to the present invention of the theft alarm device 1 of the present embodiment will be described with reference to FIG. As shown in step S1 in FIG. 5, a “reset start” is performed as the battery voltage V rises again. As shown in step S2, it is determined whether the alarm state is a warning state. Proceed to step S3, and if negative, proceed to step S8.

  In step S3, the control unit 3 determines whether or not there is information about the time before the reset start, that is, the operation stop time associated with the decrease in the battery voltage V. If the determination is affirmative, the process proceeds to step S4. Proceed before S8.

  In step S4, the control unit 3 acquires the current time, and in step S5, determines whether or not the difference Δt between the time before the reset start and the current time is equal to or greater than the predetermined time T. The process proceeds to step S6, and if negative, the process proceeds to step S7, and the vehicle battery instantaneous interruption state = stored is stored. After step S7, the process proceeds to step S8.

  In step S8, the control unit 3 determines whether or not the ignition is turned on. If the result is affirmative, the process proceeds to step S9. If the result is negative, the control part 3 proceeds to the front of RETURN. In step S9, the control unit 3 determines whether or not the vehicle battery instantaneous interruption state is present in the non-volatile memory. If the result is affirmative, the process proceeds to step S10 and the indicator 5 is turned on. If the result is negative, RETURN. Proceed.

  According to the control described above, in the burglar alarm device 1 of the first embodiment, when the reset start is performed before the predetermined time T has elapsed after the control unit 3 has shifted to the operation stop state, the vehicle battery 2 It is determined that the vehicle battery instantaneous interruption state associated with the voltage change due to deterioration is present, and a failure display can be performed when the ignition is on. Thereby, the user can grasp | ascertain the vehicle battery instantaneous interruption state by deterioration more rapidly, and can make the antitheft device 1 a more user-friendly system.

  In the first embodiment described above, the failure display associated with the deterioration of the vehicle battery 2, that is, the power source, is performed when the ignition is turned on after the user enters the vehicle, but when the deterioration occurs, the user is notified via the center 7. You can also be notified. The second embodiment will be described below.

  In the burglar alarm device 1 according to the second embodiment, a wireless device 6, a center 7, and a user portable terminal 8 are added to the burglar alarm device 1 shown in the first embodiment. The elements other than the added components are the same as those shown in the first embodiment.

  Each server in the center 7 includes a CPU, a main storage device, a storage device such as an HDD, a display device, an input device, and a drive device connected to each other via a bus. Execute control.

  The CPU included in the server of the center 7 provides various functions by reading and executing programs such as the OS and applications from the storage device, and comprehensively controls processing performed by the server. The main storage device is composed of a RAM and constitutes a work area for temporarily storing the OS, programs, and data.

  Further, the server of the center 7 is a nonvolatile memory such as an HDD or a flash memory, and stores an OS and a program. The server has a wireless device corresponding to the wireless device 6. This wireless device is an interface for connecting to a network, and is configured by a modem, a NIC, or the like, for example.

  The wireless device of the center 7 and the wireless device 6 are connected via a known network. This network is, for example, a public switched telephone network (PSTN), a digital communication network (ISDN), a wired line such as an optical fiber, a mobile phone network, a PHS (Personal Handy-phone System) network, a wireless LAN network, a WiMAX (Worldwide) Interoperability for Microwave Access), wireless, such as satellite phone and beacon.

  Note that the communication between the wireless device 6 and the wireless device by this network is in accordance with, for example, the PPP protocol (Point to Point Protocol), and establishes a data link between them by the PPP protocol, and is an upper layer. It implements TCP / IP protocol (Transmission Control Protocol / Internet Protocol), HTTP (Hyper Text Transfer Protocol) and FTP (File Transfer Protocol), which are upwardly compatible with TCP / IP, and includes the Internet and WAN (Wide Area Network). ) To enable data transmission / reception between the server of the center 7 and the wireless device 6.

  In the burglar alarm device 1 according to the second embodiment, the control unit 3 supplies power when the vehicle battery 2, that is, the time Δt from when the power source becomes equal to or lower than the predetermined voltage VR to when it exceeds the predetermined voltage VR is shorter than the predetermined time T. The notification means for notifying the user of the malfunction via the center 7 by mail or telephone is configured.

  That is, as shown in the flowchart of FIG. 7, with respect to the flowchart of FIG. 5 of the first embodiment, a step of notifying the user via the center 7 in step S11 is inserted between step S9 and step S10.

  According to the second embodiment, after the deterioration of the in-vehicle battery 2 and the battery voltage V drops, the event that the battery voltage V rises again due to the stoppage of the operation of the ECU as a load occurs via the center 7. The user can be notified. That is, the user can know the deterioration of the vehicle battery 2 before the time when the user actually gets in the next vehicle, and can prepare the replacement vehicle battery 2 by the next ride. That is, the second embodiment can construct a more user-friendly system.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions are made to the above-described embodiments without departing from the scope of the present invention. be able to.

  INDUSTRIAL APPLICABILITY The present invention can provide a burglar alarm device that can also realize a more user-friendly failure display, and is therefore useful when applied to various vehicles such as passenger cars, trucks, and buses.

1 Burglar alarm 2 Vehicle battery (power supply)
3 Control Unit 4 Alarm 5 Indicator 6 Wireless Device 7 Center 8 User Mobile Phone

Claims (4)

  An alarm means for issuing an alarm when a power supply voltage of a vehicle power supply is lower than a predetermined voltage and a reference time elapses; and a time from when the power supply becomes lower than the predetermined voltage until the power exceeds the predetermined voltage A burglar alarm device comprising failure display means for displaying a failure of the power supply when the vehicle is turned on when the time is shorter than a predetermined time shorter than the time.   The predetermined time is an increase characteristic of the power supply voltage after stopping a load mounted on the vehicle due to a drop of the power supply voltage across the predetermined voltage, and a time for removing the power supply necessary for theft of the vehicle, The theft alarm device according to claim 1, which is determined based on   The burglar alarm device according to claim 1 or 2, wherein the failure display means performs the failure display by turning on an indicator in the vehicle.   The burglar alarm device according to any one of claims 1 to 3, further comprising notification means for notifying a user of a failure of the power supply via a center in the case.

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