Antitheft apparatus

Abstract

An antitheft apparatus includes a control section. When a status change from a closed state to an open state of a luggage door caused by regular means is detected in an arming state being ready to output an alarm, the control section shifts a status from the arming state to a disarmed state being not ready to output an alarm; when a status change from the open state to the closed state of the luggage door is detected in the disarmed state, the control section shifts the status from the disarmed state to the arming state after a predetermined length of preparatory period; and when an arming command to shift the status from the disarmed state to the arming state is given within the length of preparatory period, the control section shifts the status from the disarmed state to the arming state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other and further objects, features, and advantages of the invention will be more explicit from the following detailed description taken with reference to the drawings wherein:

FIG. 1 is a block diagram showing an electrical configuration of an antitheft apparatus according to a first embodiment of the invention;

FIGS. 2A through 2C are flowcharts showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus;

FIG. 3 is a timing chart for explaining operations of the antitheft ECU;

FIGS. 4A through 4C are flowcharts showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus provided in an antitheft apparatus according to a second embodiment of the invention;

FIG. 5 is a timing chart for explaining operations of the antitheft ECU;

FIG. 6 is a flowchart showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus provided in an antitheft apparatus according to a third embodiment of the invention;

FIG. 7 is a flowchart showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus provided in an antitheft apparatus according to a fourth embodiment of the invention;

FIG. 8 is a timing chart for explaining operations when a length of preparatory period Ti is set;

FIGS. 9A and 9B are flowcharts showing a process conducted by the antitheft ECU of the vehicle-mounted apparatus provided in the antitheft apparatus according to the fourth embodiment of the invention;

FIG. 10 is a timing chart for explaining operations of the antitheft ECU, showing one example with a prolonged length of preparatory period T1;

FIG. 11 is a timing chart for explaining operations of the antitheft ECU, showing one example with a shortened length of preparatory period T1;

FIGS. 12A and 12B are flowcharts showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus mounted in an antitheft apparatus according to a fifth embodiment of the invention;

FIG. 13 is a timing chart for explaining operations of the antitheft ECU, showing one example with a vibration detecting portion;

FIG. 14 is a timing chart for explaining operations of the antitheft ECU, showing one example without the vibration detecting portion; and

FIG. 15 is a flowchart showing a process conducted by an antitheft ECU of a vehicle-mounted apparatus provided in an antitheft apparatus according to a sixth embodiment of the invention.

Claims

1. An antitheft apparatus comprising: a control section that conducts control of outputting an alarm when a theft is detected by a theft detecting section for detecting a theft of an object,wherein, when a status change from a closed state to an open state of a luggage door caused by regular means is detected in an arming state being ready to output an alarm, the control section shifts a status from the arming state to a disarmed state being not ready to output an alarm;when a status change from an open state to a closed state of a luggage door caused by regular means is detected in the disarmed state, the control section shifts the status from the disarmed state to the arming state after a predetermined length of preparatory period; andwhen an arming command to shift the status from the disarmed state to the arming state is given within the predetermined length of preparatory period, the control section shifts the status from the disarmed state to the arming state.

2. The antitheft apparatus of claim 1, wherein the theft detecting section comprises a vibration detecting section of which output is influenced by vibration of the object to be protected against theft, wherein, when the arming state is set within the predetermined length of preparatory period based on the arming command, the control section invalidates a value detected by the vibration detecting section during duration of a period until an elapse of the predetermined length of preparatory period.

3. The antitheft apparatus of claim 1, wherein the theft detecting section comprises a door detecting section for detecting an open state and a closed state of a door, wherein, when a status change from a closed state to an open state of the door is detected by the door detecting section within the predetermined length of preparatory period, the control section conducts control of outputting an alarm.

4. The antitheft apparatus of claim 1, wherein the control section conducts control of outputting an alarm which is different from a period during duration of the predetermined length of preparatory period to a period after an elapse of the predetermined length of preparatory period.

5. The antitheft apparatus of claim 1, wherein the predetermined length of preparatory period is changeable.

6. The antitheft apparatus of claim 5, wherein the theft detecting section comprises a vibration detecting section of which output is influenced by vibration of the object to be protected against theft, wherein, in a case where the predetermined length of preparatory period has been modified to be shorter than a predetermined default period, the control section invalidates a value detected by the vibration detecting section during duration of a period until an elapse of the default period when the arming state is set within the predetermined length of preparatory period based on the arming command.

7. The antitheft apparatus of claim 5, wherein, in a case where the predetermined length of preparatory period has been modified to be shorter than a predetermined default period, the control section conducts control of outputting an alarm which is different from a period during duration of the predetermined length of preparatory period to a period after an elapse of the predetermined length of preparatory period.

8. An antitheft apparatus comprising: a control section that conducts control of outputting an alarm when a theft is detected by a theft detecting section for detecting a theft; anda connection detecting section that detects whether or not a vibration detecting section of which output is influenced by vibration of an object to be protected against theft is connected to the control section,wherein, when a status change from a closed state to an open state of a door caused by regular means is detected in an arming state being ready to output an alarm, the control section shifts a status from the arming state to a disarmed state being not ready to output an alarm;in a case where connection between the vibration detecting section and the control section is detected by the connection detecting section, the control section shifts the status from the disarmed state to the arming state after an elapse of a first length of preparatory period when a status change from an open state to a closed state of the door is detected in the disarmed state; andin a case where no connection between the vibration detecting section and the control section is detected by the connection detecting section, the control section shifts the status from the disarmed state to the arming state after an elapse of a second length of preparatory period which is shorter than the first predetermined length of preparatory period when the status change from an open state to a closed state of the door is detected in the disarmed state.