JP2010076475A - Control device and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine a case of battery exhaustion and a case of battery removal due to a theft and not to give an alarm in the case of the battery exhaustion. <P>SOLUTION: A control device includes a storage unit composed of a nonvolatile memory storing a security state, and a control unit executing an alarm generating process generating an alarm from an alarm outputting unit arranged in a vehicle when a signal indicating that a switch unit arranged in the vehicle is open has been detected and the security state is under a security function operating state, and an alarm non-generating process determining, when the voltage of a battery arranged in the vehicle rises from a reference value or below to a reference value or above after a signal indicating the open state has not been detected, the security state before the battery voltage stored in the storage unit becomes the reference value or below and not generating an alarm from the alarm outputting unit when the security state is under the security function operating state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control device and a control method thereof.

  In recent years, various anti-theft devices for preventing vehicle theft and vandalism have been proposed. The anti-theft device, for example, monitors the status of doors, bonnets, trunks, battery voltage, intrusion sensors, vibration sensors, tilt sensors, etc. when it is in the security function operating state, and detects abnormalities when the status changes In some cases, an alarm is generated by sounding a siren or blinking a hazard lamp.

  For example, if the battery voltage falls below the reference value due to the removal of the battery during the security function operation, etc., and then the battery is reconnected and the battery voltage exceeds the reference value, the antitheft device Recognizing that the battery has been removed due to vehicle theft, an alarm is generated. As a result, it is possible to inform the surroundings that the vehicle is stolen, and it is possible to minimize damage.

For example, Patent Document 1 stores a security state before the battery voltage falls below a reference value. When the battery voltage exceeds a reference value, the stored security state is read out to A technique is disclosed in which an alarm is issued if the security function is in an operational state, and an alarm is not generated if the security function is in an inoperative state.
JP 2002-79911 A

  By the way, if the vehicle is left for a long period of time with the anti-theft device in the security function operating state, the battery voltage gradually decreases, and eventually the battery goes up. In this case, the user charges the battery. However, according to the method of Patent Document 1, if the battery voltage exceeds a reference value due to charging, the security state before the battery rises is the security function operating state. Recognizing that the battery has been removed for this reason, an alarm will be issued. That is, in the method of Patent Document 1, it is not possible to distinguish between a case where the battery has run out due to the vehicle being left for a long time and a case where the battery has been removed due to theft.

  The present invention has been made in view of the above circumstances, and can determine whether the battery has gone up and when the battery has been removed due to theft. An object is to provide a control method.

  In order to achieve this object, a control device of the present invention includes a storage unit configured by a nonvolatile memory for storing a security state, and an opening / closing provided in a vehicle when the security state is a security function operating state. When a signal indicating that the part is in an open state is detected, after an alarm generation process for generating an alarm from an alarm output part provided in the vehicle and a signal indicating that the part is in an open state are not detected When the voltage of the battery provided in the vehicle rises from a reference value or less to a reference value or more, the state of the security before the battery voltage stored in the storage unit becomes a reference value or less is determined, When the security state is a security function operating state, a control unit that executes alarm non-generation processing that does not generate an alarm from the alarm output unit, and It adopts a configuration that. According to this configuration, it is possible to discriminate between when the battery has run out and when the battery has been removed due to vehicle theft, and when the battery has run out, no alarm can be generated. .

  In the above configuration, when the control unit detects a signal indicating that the opening / closing unit is in a closed state after executing the alarm non-occurrence process, the security function sets the security state to a security function operating state. A configuration for further executing the setting process can be employed. According to this configuration, since the security function is automatically returned to the operating state, safety can be improved.

  In the above configuration, the control unit is stored in the storage unit when the voltage of the battery rises from a reference value or less to a reference value or more when the security state is an alarm state that generates the alarm. A configuration in which the security state before the battery voltage falls below a reference value is determined, and when the security state is the alarm state, the alarm generation process for generating an alarm from the alarm output unit is executed. Can be adopted. According to this configuration, an alarm can be generated when the battery is removed and reconnected for vehicle theft.

  In the above configuration, the reference value may be a minimum voltage value at which the control unit can operate.

  The control method of the control device according to the present invention is provided in the vehicle when a signal indicating that the opening / closing part provided in the vehicle is in an open state is detected when the security state is the security function operating state. After the step of generating an alarm from the alarm output unit and the signal indicating that the opening / closing unit is in an open state are not detected, the voltage of the battery provided in the vehicle rises from a reference value or less to a reference value or more The security state before the battery voltage stored in the storage unit including a nonvolatile memory that stores the security state becomes equal to or lower than a reference value, and the security state is a security function operating state. In some cases, a configuration is employed that includes a step of not generating an alarm from the alarm output unit. According to this configuration, it is possible to discriminate between when the battery has run out and when the battery has been removed due to vehicle theft, and when the battery has run out, no alarm can be generated. .

  According to the present invention, it is possible to discriminate between the case where the battery has run out during the security function operation and the case where the battery has been removed due to vehicle theft. It becomes possible to.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating an anti-theft system including a control device according to the first embodiment. Referring to FIG. 1, the switch 10 of the door courtesy switch 12, the bonnet courtesy switch 14, the trunk courtesy switch 16, the intrusion sensor 18, the vibration sensor 19, and the tilt sensor 20 and the output signal of the sensor are input to the control device 10.

  The door courtesy switch 12 detects the open / closed state of the driver's seat door, the passenger seat door, and the rear seat door of the vehicle, the bonnet courtesy switch 14 detects the open / closed state of the bonnet, and the trunk courtesy switch 16 detects the open / closed state of the trunk. A signal from each courtesy switch is input to the control device 10. For example, when the hood is opened, a signal indicating that the hood is in an open state is input from the bonnet courtesy switch 14 to the control device 10.

  The intrusion sensor 18 is a sensor that detects, for example, that someone has entered the vehicle interior by circulating ultrasonic waves or the like in the vehicle interior. The vibration sensor 19 is a sensor that detects the vibration of the vehicle. The inclination sensor 20 uses, for example, a gyro sensor or the like, and is a sensor that detects an angle, acceleration, and the like of the vehicle. Detection signals from the intrusion sensor 18, the vibration sensor 19, and the tilt sensor 20 are output to the control device 10. For example, when the vehicle is tilted by pulling up one end of the vehicle to move the vehicle by tow, a signal indicating that the vehicle is tilted is input from the tilt sensor 20 to the control device 10.

  The control device 10 includes a control unit 22, a storage unit 24, and a battery voltage monitor 26. The control unit 22 includes a ROM (Read Only Memory) 30 that stores a control program, an ID code that will be described later, a battery voltage reference value, and the like, and a RAM (Random Access Memory) that temporarily stores a security operation mode that will be executed later. ) 32, a CPU (Central Processing Unit) 34 that executes each control, and an input / output unit 36. The storage unit 24 includes a nonvolatile memory EEPROM (Electrically Erasable Programmable Read-Only Memory) or the like, and stores a security state (operation mode). The control device 10 operates by supplying a voltage of, for example, 12 V from the battery 28, and the battery voltage monitor 26 measures the magnitude of the voltage supplied from the battery 28.

  The control unit 22 executes any one of the security operation modes of the non-warning mode, the warning mode, the threatening mode, the warning mode, and the battery rising mode. And the control part 22 memorize | stores the execution mode in the memory | storage part 24, when at least any one of non-warning mode, warning mode, and warning mode is performed.

  The non-warning mode refers to a state where security is not set, that is, a state where the security function is not activated. The non-warning mode is set when the control device 10 receives a security unset signal from an anti-theft transmitter (not shown). The non-warning mode can also be set when a key is inserted into the key cylinder or when the ignition is turned on.

  The alert mode is a state in which security is set, that is, a state in which a security function is activated. The warning mode is a state in which the opening / closing parts such as doors, bonnets, and trunks are closed, and the detection signals transmitted from the intrusion sensor, the vibration sensor, and the tilt sensor are lower than the first threshold (intrusion determination threshold). 10 is set by receiving a security set signal from the anti-theft transmitter.

  The threatening mode is a state in which the detection signal constantly transmitted from the intrusion sensor, the vibration sensor, and the tilt sensor exceeds the first threshold value. When the detection signal exceeds the first threshold, each sensor shifts from the sleep state to the wake-up state. The sleep state refers to a state (intermittent state) in which a signal transmission / reception cycle between each sensor and the control unit 22 is long, and the wake-up state refers to a state in which a transmission / reception cycle is short. This threat mode is a mode that can be taken only for detection signals from the intrusion sensor, the vibration sensor, and the tilt sensor.

  The alarm mode is a second threshold higher than the first threshold when the detection signal transmitted from the intrusion sensor, the vibration sensor, and the tilt sensor exceeds the first threshold for a predetermined time during the alarm mode. When exceeding, or when the courtesy switch of a door, a bonnet, and a trunk is turned ON, it means a state in which an alarm is generated for a predetermined time. The alarm is performed by combining any one or a plurality of alarms emitted as sound from the siren 38 and the horn 40 and alarms emitted as light from the hazard 42, the head lamp 44, and the tail lamp 46.

  The battery rising mode refers to a state in which an open / close state of an opening / closing part such as a door is detected but an alarm is not generated without shifting to the alarm mode even when the opening / closing part is open. In the battery rising mode, the battery voltage rises above the reference value and the control device 10 is in the operating state after the battery voltage becomes lower than the reference value and the control device 10 goes down during the alert mode. Set to

  FIG. 2 is a functional block diagram of a control device realized by the cooperation of hardware such as the CPU 34 and software stored in the ROM 30 in the control unit 22. Referring to FIG. 2, the control unit 22 includes a warning mode setting process 52, an abnormality detection process 54, a battery voltage determination process 56, an alarm non-generation process 58, a determination process 60, an alarm mode setting process 62, and an alarm generation process 64. Function.

  The warning mode setting process 52 sets the warning mode in the RAM and stores the warning mode in the storage unit 24 based on the security set signal from the anti-theft transmitter 50. In the abnormality detection processing 54, a signal indicating that the door, bonnet, trunk or the like is in an open state is transmitted from the door courtesy switch 12, the bonnet courtesy switch 14, the trunk courtesy switch 16, or the like, or an intrusion sensor. 18. Whether the detection signals transmitted from the vibration sensor 19 and the tilt sensor 20 have been in a state where the first threshold value has been exceeded for a long time or has exceeded the second threshold value (hereinafter, such a state may be referred to as an abnormal state). Detection). When these abnormal states are not detected, the battery voltage determination process 56 determines whether the battery voltage measured by the battery voltage monitor 26 is greater than or less than the battery voltage reference value stored in the ROM. If the battery voltage is maintained at or above the reference value, the abnormality detection process 54 is executed again. When the battery voltage falls below the reference value and then rises above the reference value, the battery up mode is set in the RAM by the alarm non-generation processing 58. During the battery going-up mode, the transition to the alarm mode is not performed, and no alarm is generated from the alarm output unit 48. The determination process 60 determines whether the opening / closing parts such as the door, the bonnet, and the trunk are closed during the battery rising mode. When it is confirmed that all the opening / closing parts are in the closed state, the warning mode is reset in the RAM by the warning mode setting process 52.

  When an abnormal state is detected in the abnormality detection process 54, the alarm mode is set in the RAM and the alarm mode is stored in the storage unit 24 by the alarm mode setting process 62. The alarm generation process 64 generates an alarm from the alarm output unit 48 for a predetermined time while the battery voltage determination process 56 determines that the battery voltage is equal to or higher than the reference value after the alarm mode is set. When the battery voltage becomes lower than the reference value by the battery voltage determination processing 56 and then rises to the reference value or higher, the alarm mode is reset in the RAM by the alarm mode setting processing 62, and subsequently the alarm is generated by the alarm generation processing 64. Is generated.

  Next, the operation of the control device 10 according to the first embodiment will be described using the flowcharts of FIGS. 3 and 4. 3 and 4, first, when the control unit 22 of the control device 10 receives a security set signal from the anti-theft transmitter (step S10), the ID code of the anti-theft transmitter included in the signal. Is coincident with the regular ID code registered in the ROM. If they match, the control unit 22 confirms that all doors, bonnets, trunks, and other open / close parts are closed by the output signals of the door courtesy switch 12, the bonnet courtesy switch 14, and the trunk courtesy switch 16. Thereafter, the warning mode is set in the RAM and stored in the storage unit 24 (step S12). When the ID code does not match the regular ID code, the control unit 22 regards that the security set signal is transmitted from an inappropriate anti-theft transmitter, and does not set or store the alert mode.

  After setting and storing the alert mode, the control unit 22 determines whether or not an abnormal state has been detected (step S14). That is, in step S14, it is possible to detect the presence or absence of vehicle theft and vehicle vandalism. If an abnormal state is detected, the process proceeds to step S24. If no abnormal state is detected, the process proceeds to step S16.

  In step S16, the control unit 22 determines whether or not the battery voltage measured by the battery voltage monitor 26 is equal to or less than a reference value stored in the ROM (step S16). The reference value is a voltage value immediately before the control device 10 becomes inoperable, that is, a minimum voltage value at which the control device 10 can operate, and is 6 V, for example. By the way, when the vehicle is left for a long period of time in the alert mode, the battery voltage gradually decreases, and eventually the battery voltage becomes higher than the reference value. Considering that the opening / closing parts such as the door, bonnet, and trunk are not opened in step S14, if the battery voltage becomes lower than the reference value in step S16, the battery may be in a battery-up state. Is expensive. Here, the battery rising state will be described in more detail with reference to the operation waveform diagram of FIG.

  The battery voltage that was equal to or higher than the reference value at the beginning of the alert mode setting (see a in FIG. 5) gradually decreases and becomes lower than the reference value (see b in FIG. 5) when the vehicle is left for a long time. This state is a battery rising state. When the battery goes up, the battery is normally charged. The battery is generally charged by first opening the door (see c in FIG. 5) and opening the bonnet with the hood open lever in the vehicle compartment (see d in FIG. 5). At this time, a signal indicating that the door and the hood are in an open state is input from the door courtesy switch 12 and the bonnet courtesy switch 14, but the control device 10 is inoperable in the battery-up state, so that the alarm mode described later is set. Do not migrate.

  When the battery is charged and the battery voltage rises above the reference value (see step S18 in FIG. 3 and e in FIG. 5), the operation function of the control device 10 is restored. When the operation function of the control device 10 is restored, the control unit 22 executes the initial process and initializes it, and then reads the storage contents of the storage unit 24 to determine the operation mode before the battery voltage falls below the reference value. If the operation mode is the alert mode, the battery up mode is set in the RAM (see step S20 in FIG. 3 and f in FIG. 5). The door courtesy switch 12 and the bonnet courtesy switch 14 continue to output a signal indicating that the door and the bonnet are in an open state, but the control unit 22 does not shift to the alarm mode during the battery rising mode, Does not generate an alarm.

  When the charging of the battery is completed, the bonnet is closed (see g in FIG. 5), the door is closed (see h in FIG. 5), and a series of battery charging operations is completed. After that, after confirming that the door, bonnet, trunk and other open / close parts are all closed by the output signals from the door courtesy switch 12, the bonnet courtesy switch 14, the trunk courtesy switch 16, etc. (see FIG. 3). In step S22), the control unit 22 resets the battery rising mode stored in the RAM to the warning mode (see step S12 in FIG. 3 and i in FIG. 5).

  If an abnormal state is detected in step S14 in FIG. 3, the control unit 22 sets the warning mode stored in the RAM to the alarm mode, and also stores the alarm mode in the storage unit 24 (FIG. 4). Step S24). The control unit 22 generates an alarm from the alarm output unit 48 by using any one or a combination of alarms by sound from the siren 38, the horn 40, and the like and alarms by light from the hazard 42, the headlamp 44, the tail lamp 46, and the like (step S40). S26).

  Even during the alarm mode, the control unit 22 determines whether or not the battery voltage measured by the battery voltage monitor 26 is equal to or lower than a reference value (step S28). If the battery voltage is equal to or higher than the reference value, it is confirmed whether a signal for performing security unset is transmitted from the antitheft transmitter (step S32). When it is transmitted, the control unit 22 sets the alarm mode stored in the RAM to the non-warning mode, and also stores the non-warning mode in the storage unit 24 (step S36). If the security unset signal has not been transmitted, it is determined whether the alarm has occurred for a preset time (for example, 5 minutes) (step S34). If so, an alarm is continuously generated (step S26). If the alarm time exceeds the set time, the control unit 22 terminates the alarm and causes the RAM and the storage unit 24 to store the alarm mode again. Note that by setting the alarm generation time in advance in this way, the alarm does not continue to be generated for a long time.

  If it is determined in step S28 that the battery voltage is equal to or lower than the reference value, it is highly likely that the thief has removed the battery due to vehicle theft in view of the fact that the door and other open / close parts are in the open state. For this reason, when the battery voltage rises to a reference value or higher due to reconnection of the battery or the like (step S30), the control unit 22 executes initial processing and initializes, and then the stored contents of the storage unit 24 Is read out, the operation mode before the battery voltage falls below the reference value is determined, and when the operation mode is the alarm mode, the alarm mode is reset in the RAM (step S24). Thereby, when a thief removes a battery due to vehicle theft, an alarm can be continuously generated.

  As described above, according to the first embodiment, in the alert mode, the determination of the battery voltage value is performed in a separate process after the determination of the abnormal state detection. The case can be discriminated. As a result, it is possible to prevent the alarm output unit 48 from generating an alarm when the battery is running out.

  Furthermore, after detecting a signal indicating that the door or other open / close part is in the closed state during the battery rising mode, the security operation mode is automatically reset to the warning mode, so that it automatically returns to the warning mode. Can improve the performance.

  In the alarm mode, when the battery voltage rises from the reference value or less to the reference value or more, by resetting the security operation mode to the alarm mode, when the thief disconnects and reconnects the battery due to vehicle theft, The alarm can be continuously generated.

  In the first embodiment, the case where the battery voltage and the battery removal due to the thief are detected is shown as an example, but the present invention is not limited to this. For example, by measuring the current value from the battery, Detection of battery removal and battery removal by a thief may be performed, or other methods may be used. Further, other switches and sensors may be used as switches and sensors used for theft detection. Furthermore, the alarm output unit 48 is not limited to the siren 38, the horn 40, the hazard 42, the head lamp 44, and the tail lamp 46, but may be any other object that can generate an alarm.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed.

FIG. 1 is a block diagram illustrating an anti-theft system including a control device according to the first embodiment. FIG. 2 is a functional block diagram of the control unit of the control device according to the first embodiment. FIG. 3 is a flowchart (part 1) illustrating the operation of the antitheft system including the control device according to the first embodiment. FIG. 4 is a flowchart (part 2) illustrating the operation of the antitheft system including the control device according to the first embodiment. FIG. 5 is an operation waveform diagram for explaining the battery rising state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Control apparatus 12 Door courtesy switch 14 Bonnet courtesy switch 16 Trunk courtesy switch 18 Intrusion sensor 19 Vibration sensor 20 Tilt sensor 22 Control part 24 Memory | storage part 26 Battery voltage monitor 28 Battery 30 ROM
32 RAM
34 CPU
36 I / O section 38 Siren 40 Horn 42 Hazard 44 Head lamp 46 Tail lamp 48 Alarm output section 50 Anti-theft transmitter 52 Warning mode setting process 54 Abnormality detection process 56 Battery voltage judgment process 58 Alarm non-generation process 60 Judgment process 62 Alarm mode Setting process 64 Alarm generation process

Claims (5)

A storage unit configured by a non-volatile memory for storing a security state;
When the security state is a security function operating state, an alarm is generated from an alarm output unit provided in the vehicle when a signal indicating that an opening / closing unit provided in the vehicle is in an open state is detected After the alarm generation process and the signal indicating that the vehicle is in the open state are not detected, the battery voltage provided in the vehicle is stored in the storage unit when the voltage of the battery provided in the vehicle rises from a reference value or less to a reference value or more. The security state before the battery voltage falls below a reference value is determined, and if the security state is a security function operating state, an alarm non-generation process that does not generate an alarm from the alarm output unit is executed. And a control unit.   When the control unit detects a signal indicating that the opening / closing unit is in a closed state after executing the alarm non-occurrence processing, the control unit further performs a security function setting process for setting the security state to a security function operating state. The control device according to claim 1, wherein the control device is executed.   When the battery voltage rises from a reference value or less to a reference value or more when the security state is an alarm state for generating the alarm, the control unit stores the battery voltage stored in the storage unit. The security state before the value falls below a reference value is determined, and when the security state is the alarm state, the alarm generation process for generating an alarm from the alarm output unit is executed. The control device according to claim 1 or 2.   The control device according to claim 1, wherein the reference value is a minimum voltage value at which the control unit can operate. A step of generating an alarm from an alarm output unit provided in the vehicle when a signal indicating that an opening / closing unit provided in the vehicle is in an open state is detected when the security state is a security function operating state When,
After the signal indicating that the opening / closing part is in the open state is not detected, if the voltage of the battery provided in the vehicle rises from the reference value or less to the reference value or more, the nonvolatile state that stores the security state Judgment of the security state before the battery voltage stored in the memory storage unit becomes below a reference value, and when the security state is a security function operating state, an alarm is generated from the alarm output unit A control method for the control device, comprising:

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