JP2008247201A - Car security device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car security device capable of properly outputting an alarm according to a time zone. <P>SOLUTION: This car security device is provided with a detection means 10 for detecting a state change of a vehicle, an alarm output means 13 capable of outputting an alarm, an abnormality decision means 12 for deciding the presence or absence of occurrence of an abnormality based on a sensor output of the detection means 10, an alarm output means 13 for outputting the alarm when the occurrence of the abnormality is decided by the abnormality decision means 12, an illuminance sensor 15 for detecting brightness, and a time zone estimation means 16 for estimating the present time zone based on an output of the illuminance sensor 15. A mode of the alarm output is changed according to the time zone estimated by the time zone estimation means 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a car security device that monitors the occurrence of an abnormality occurring in a vehicle and outputs an alarm or the like when the abnormality occurs.

  2. Description of the Related Art Conventionally, there is known a car security device that monitors the state of a vehicle using various sensors and issues a notification when abnormality is detected (for example, Patent Document 1).

In general, a car security device normally performs an alarm operation such as generating a predetermined buzzer sound or performing a predetermined light emitting operation when an occurrence of an abnormality is detected. In addition, there is a configuration in which the sound pressure of the buzzer sound, the light emission amount, and the like can be manually adjusted.
Japanese Patent Application Laid-Open No. 2004-243782

  In a constant alarm operation, the effect varies depending on the time period during which the alarm is output. For example, a person can be notified of the occurrence of an abnormality with a short alarm during a day of human activity, but a relatively long time is required to notify the occurrence of an abnormality at midnight when there is little human activity.

  An object of the present invention is to provide a car security device capable of outputting an appropriate alarm according to a time zone.

  In order to achieve the above object, the invention described in claim 1 is directed to detecting means for detecting a change in the state of the vehicle, an alarm output means capable of outputting an alarm, and whether or not an abnormality has occurred based on the sensor output of the detecting means. An illuminance sensor for detecting brightness in a car security device comprising: an abnormality determination unit for determining; and an alarm control unit for causing the alarm output unit to output an alarm when the abnormality determination unit determines that an abnormality has occurred. A time zone estimating means for estimating a current time zone based on the output of the illuminance sensor, wherein the alarm control means changes the mode of the alarm output according to the time zone estimated by the time zone estimating means. It is characterized by letting.

  According to a second aspect of the present invention, in the car security device according to the first aspect, the alarm control means changes an output time length of the alarm output in accordance with the estimated time zone.

  According to a third aspect of the present invention, in the car security device according to the first or second aspect, the time zone estimating means includes a time measuring means capable of measuring time of at least 24 hours, output data of the illuminance sensor, and the time measuring means. A data table capable of storing at least 24 hours in association with time data, and based on the transition pattern of the output data of the illuminance sensor in the data table, the estimated time endurance is associated with the time data It is characterized by doing.

  According to the present invention, there is an effect that the current time zone is estimated based on the output of the illuminance sensor, and alarm output can be performed in a manner corresponding to the estimated time zone.

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

[First Embodiment]
FIG. 1 is a block diagram showing a functional configuration of the car security device according to the first embodiment of the present invention.

  The car security device 1 according to this embodiment is a device that detects an abnormality that occurs in a vehicle, such as a rough car, for example, and issues a warning notification. As shown in FIG. 1, the car security device 1 is set with a sensor 10 as detection means for detecting a change in state occurring in the vehicle, and various condition data for determining the occurrence of an abnormality and performing warning notification. A condition setting unit 11 as a condition setting unit, a comparison determination unit 12 as an abnormality determination unit that treats the output of the sensor 10 as time-series data and determines whether or not an abnormality has occurred by comparison processing described later, and an abnormality occurrence. An alarm output means for outputting an alarm and an alarm control means 13 as an alarm control means, a release detection section 14 for stopping the alarm output when a release signal is received during the alarm output, and determining the current time zone Illuminance sensor 15 for detecting brightness, time zone determination unit 16 as time zone estimation means for performing current time zone judgment processing, and time zone judgment processing. And a luminance data table 17 or the like.

  The sensor 10 includes, for example, a voltage sensor that detects a change in the voltage of an interior lamp when the door is open, an infrared sensor that detects infrared rays emitted from a human body, an air pressure sensor that detects changes in air pressure associated with opening and closing of the door, and a vehicle. Various sensors such as an inclination sensor for detecting the inclination of the vehicle and an acceleration sensor for detecting the movement of the vehicle can be applied. In this embodiment, an example in which an infrared sensor is applied will be described as an example.

  The condition setting unit 11 includes a non-volatile memory as a setting storage unit in which condition data is stored and stored, and a warning notification time indicating a sensor output change pattern indicating the occurrence of an abnormality and a duration of an alarm output when the abnormality occurs. Various condition data such as data and level data representing sound pressure and light quantity at the time of alarm output are set. The change pattern of the sensor output is a data group obtained by sampling the output of the sensor 10 in a predetermined time width (for example, several seconds) in time series. For example, the sensor output when the person gets in the data is sampled. Thus, it is used as comparison source data in the comparison process of the comparison determination unit 12.

  For these condition data, standard condition data is set as a default value at the time of product shipment. For example, the change pattern of the sensor output and the level data of the alarm output are newly set by the user setting process. It is possible to enter settings. The warning notification time data is set and inputted by the time zone determination unit 16 according to the current time zone.

  The warning notification unit 13 performs an acoustic warning output such as a buzzer sound or a voice output, or a warning output by illumination such as light irradiation.

  The release detection unit 14 includes, for example, an infrared receiving unit and has a function of inputting an infrared remote control signal from the outside. When a remote control signal for canceling the alarm is input at the time of alarm output, a signal for canceling the alarm output is output to the comparison determination unit 12.

  The time zone determination unit 16 has, for example, a long-term timer as a clocking means capable of clocking for 24 hours, and registers the output of the illuminance sensor 15 in the illuminance data table 17 in association with the timing data of the long-term timer. Along with the transition pattern of the illuminance data registered in the illuminance data table 17, the time data of the long-term timer is associated with the actual time zone to determine the current time zone.

  Among the above configurations, the condition setting unit 11, the comparison determination unit 12, and the time zone determination unit 16 are software configurations realized by a control program stored in a CPU of a microcomputer or a nonvolatile memory, for example.

  FIG. 2 is a waveform diagram showing an example of a time-series change pattern of the sensor output set in the condition setting unit 11, and FIG. 3 is a sensor output comparison determination process executed in the comparison determination unit 12. The waveform diagram explaining the contents is shown.

  The condition setting unit 11 stores, for example, sampling data of the output of the sensor 10 as shown by the output waveform S0 of FIG. 2 as a change pattern of the sensor output indicating the occurrence of abnormality. Further, such a time-series data group can be set and input later by the user, for example. For example, after the user operates an operation switch (not shown), the output signal of the sensor 10 when a person gets into the vehicle is sampled by performing an operation such as the user getting into the vehicle after a predetermined time. A time-series data group of time is stored in the condition setting unit 11 as change pattern setting data representing the occurrence of the abnormality.

  The comparison / determination unit 12 samples and captures the output signal of the sensor 10 and compares the sampling data with the condition data stored in the condition setting unit 11. The comparison process is not performed based on whether or not the output level of the sensor 10 exceeds the thresholds s1 and s2 (FIG. 2), but the change pattern of the sensor output by looking at the sampling data from the sensor 10 over a predetermined time width. Is performed based on whether or not it approximates the change pattern of the condition data in FIG.

  For example, as shown in FIG. 3, it is assumed that the condition data of the output waveform S0 is set in the condition setting unit 11, and the sampling data of the sensor output of the output waveform S1 is taken into the comparison determination unit 12. In this case, for example, first, the peak point of the output waveform S1 is found from the sampling data of the sensor output, and the amount of change in the sampling data in time series over a range of a fixed period (time t1 to t2) before and after the peak point. Are respectively calculated. Then, this is compared with that of the output waveform S0 set in the condition setting unit 11. If this difference is within a certain value, the change pattern of both output waveforms S0, S1 is approximated, and the occurrence of an abnormality is determined. If the difference exceeds a certain value, both output waveforms S0, S1 are determined. It is determined that there is no abnormality because the change patterns are different.

  The comparison method is not limited to the above method, and various methods can be applied. For example, the difference in the output level of the sensor output is canceled by both output waveforms S0 and S1, and pattern matching of both output waveforms S0 and S1 is performed in this state to determine whether or not both output waveforms S0 and S1 are approximate. It is also possible to adopt a method of judging. Alternatively, the output waveform S1 may be displaced in the time axis direction to compare the amount of change between the output waveforms S0 and S1 and perform pattern matching.

  In the example of FIG. 3, the signal level of the output waveform S1 exceeds the threshold values s1 and s2 of the condition data in the example of FIG. 3 because the abnormality occurrence is determined based on whether or not the output level of the sensor 10 exceeds the threshold value as in the prior art. However, according to the comparison method of this embodiment, the occurrence of abnormality can be detected even in the case of FIG. For example, assuming that an infrared sensor is installed as the sensor 10 and a person has entered the vehicle, the output level of the sensor 10 differs depending on whether the person is wearing clothes or not. . For this reason, it is difficult to perform abnormality detection in all cases in the conventional comparison determination process, but in the comparison method of the present embodiment, the comparison determination is performed based on the change pattern of the infrared detection signal when a person gets in. Even when a person wears clothes or wears light clothes, it is possible to detect the occurrence of an abnormality with high accuracy. Even when the output level of the sensor 10 changes between low temperature and high temperature depending on the temperature characteristics, the sensor output is compared in a form that absorbs the influence of the temperature characteristics to detect the occurrence of abnormality. Is possible.

  FIG. 4 shows a data chart showing an example of the illuminance data table.

  The illuminance data table 17 is a data table in which clock data of a long-term timer and illuminance data (indicated by “actual illuminance” in FIG. 4) are stored for every 24 hours for 24 hours. The time zone determination unit 16 generates the illuminance data table 17 as described above, and based on the illuminance data transition pattern of the illuminance data table, for example, the time data of the long-term timer is set to three time zones (twilight zone, nighttime, midnight). It operates to categorize into (/ Dawn). Further, the control process is executed so as to switch the warning notification time setting data of the condition setting unit according to each category.

  That is, the time point when the illuminance sensor 15 detects illuminance “0” to “1” is used as a base point, 12 hours from this base point is twilight zone (daytime), the next 5 hours at night, and the next 7 hours at midnight / dawn And When the current time is the twilight zone (daytime), it is a human activity time zone, so the alarm output time is set to the standard time. In addition, when it is nighttime, since the activity of people outside the room is slightly reduced, the alarm output time is set a little longer than the standard time. In the late night / dawn time zone, there is almost no human activity outdoors, so the alarm output time is set to twice the standard time. This time setting method is not limited to this example.

  The detection data of the illuminance sensor 15 is intended to detect, for example, that the illuminance sensor 15 is illuminated by a light or the like to detect high illuminance even at night, or that it is extremely cloudy during the day and can only detect illuminance equivalent to nighttime. Do not fluctuate. Therefore, in the time zone determination process in the time zone determination unit 16, a correction process may be performed so as to remove the fluctuation of the output of the illuminance sensor 15 as described above. For example, the illuminance data of the illuminance data table 17 is accumulated for a plurality of days, for example, and averaged with the same time data, or the illuminance data is collected every short time, for example, every 30 minutes, and It is possible to perform various correction processes such as averaging the illuminance data for the time and considering the illuminance data for that time period.

  Further, the method for determining the time zone based on the illuminance data table 17 is also a method of determining each time zone based on the time point when the illuminance “0” is switched to “1” as described above. However, various methods can be applied. For example, a method is adopted in which the illuminance data in the illuminance data table 17 is divided into two groups, a range of high illuminance and a range of low illuminance, and each division of day, night, and midnight is determined based on this division. You can also

  The car security device 1 of this embodiment can cope with the occurrence of abnormalities such as roughing of the vehicle by performing the following operation with the above-described configuration. That is, the user sets the car security device 1 in the security operation state when leaving the vehicle. While a user is away from the vehicle, when a third party enters the vehicle due to roughing of the vehicle or the like, an output indicating a constant signal change is performed from the sensor 10, and the sensor output at this time is data for a predetermined time width. It is sampled and sent to the comparison judgment unit 12. Then, the comparison / determination unit 12 compares the sampling data of the sensor output with the data of the output waveform representing the occurrence of abnormality set in the condition setting unit 11 to determine whether or not these change patterns are approximate. To be judged.

  And when it is judged that it is approximated, while the warning alerting | reporting part 13 act | operates and a warning output is made, this warning output is continued until the warning alerting time set in the condition setting part 11 passes. It can be continued. The warning notification time is set to a time length corresponding to the time zone when the abnormality occurs based on the illumination data table 17 or the time measurement data of the long-term timer, so if the time zone when the abnormality occurs is daytime Alarm output is executed at a standard time, a little longer at night, and at midnight / dawn at twice the standard time.

  In addition, when a warning is output because the user has entered the vehicle and the alarm is output because the vehicle is not rough, the user operates the remote control device to transmit a release signal to the release detection unit 14. This alarm output is stopped.

  As described above, according to the car security device 1 of this embodiment, the occurrence of an abnormality is not detected by detecting whether or not an abnormality has occurred based on the signal level of the sensor output, but by a change pattern of the sensor output over time in a certain time width. Therefore, even when the signal level of the sensor output changes depending on the environment at that time, it is possible to detect anomalies with high accuracy with little oversight of errors and false detections.

  In addition, sensor condition change pattern data indicating the occurrence of an abnormality is set and stored in the condition setting unit 11, and the occurrence of abnormality is determined by comparing this data with the sensor output data change pattern. An abnormality occurrence determination process can be realized by a simple calculation process.

  Moreover, since the change pattern of the sensor output indicating the occurrence of abnormality can be set and stored in the condition setting unit 11 as new condition data by the user setting process, detection according to the user can be executed.

  Further, since the mode of alarm output is changed according to the time zone when an abnormality is detected, it is possible to perform effective alarm output suitable for each time zone such as daytime, nighttime, midnight / dawn. Further, since the detection of the time zone is automatically performed by the output of the illuminance sensor 15 or the like, it is not necessary for the user to set manually, and the occurrence of malfunction due to a setting error can be reduced.

[Second Embodiment]
FIG. 5 is a block diagram illustrating a functional configuration of the car security device according to the second embodiment.

  The car security device 1B of the second embodiment includes a first wireless device 21 on the main body side of the car security device 1B, and includes a second wireless device 22 as a device that is carried and carried by a user. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

  The first wireless device 21 inputs a signal from the comparison determination unit 12 to the second wireless device 22 when the comparison determination unit 12 determines that an abnormality has occurred and causes the warning notification unit 13 to execute an alarm output. The occurrence information is configured to be wirelessly transmitted. In addition, when a release signal is wirelessly received from the second wireless device 22, a signal is output to the release detection unit 14 to stop the alarm output.

  The second wireless device 22 is a functional block that performs wireless communication with the first wireless device 21, an unillustrated notifying unit that outputs a buzzer sound and generates vibration, and an operation button for releasing an alarm Etc., and when the information on the occurrence of abnormality is received from the first wireless device 21, the notification means is activated, or the alarm output cancel signal is sent to the first wireless device 21 when the operation button for releasing the alarm is operated. Is configured to wirelessly transmit.

  According to the car security device 1B of this embodiment, even when the user is far away from the vehicle and the alarm output of the car security device 1B cannot be heard, the first wireless device 21 on the main body side and the user carry the first 2 By wireless communication with the wireless device 22, it is possible to notify the user of the occurrence of an abnormality or cancel the notification operation from the user side.

[Third Embodiment]
FIG. 6 is a block diagram illustrating a functional configuration of the car security device according to the third embodiment.

  The car security device 1C according to the third embodiment is a combination of a car device 25 such as a car audio or a navigation device and a functional configuration of car security. Since other configurations are the same as those of the second embodiment, description thereof is omitted.

  The car device 25 includes, for example, a display device capable of displaying an image, and input means including a plurality of operation buttons or a touch panel. Using these display devices and input means, setting of various condition data of the condition setting unit 11 is performed. It is comprised so that etc. can be performed. Further, when a warning output is made by the warning notification unit 13, a signal of this warning output is sent to the car device 25, and a notification operation linked with the car device 25 is performed.

  Furthermore, since a non-volatile storage medium having a relatively large capacity is mounted in the car device 25, when the comparison determination unit 12 determines that an abnormality has occurred, the car device 25 may detect the abnormality occurrence data or its Date and time data and the like are stored in a non-volatile storage medium, and such information is displayed on a display device based on a user operation and can be confirmed by the user.

  According to the car security device 1 </ b> C of this embodiment, the alarm output is forcibly stopped by a third party who is performing roughing on the vehicle or the like by also outputting the alarm in conjunction with the car device 25 when an abnormality occurs. Can make it difficult. For example, when the alarm output is performed only by the car security device, the alarm output can be stopped by cutting the power cable of the car security device, etc., but the alarm output is also performed by the car device 25. It is possible to prevent all alarm outputs from being stopped only by cutting the cable.

  In addition, by enabling various settings of the car security device 1C using a display device or the like provided in the car device 25, it is possible to allow the user to perform setting operations that are easy to understand and have no mistakes. By providing the setting screen of the car security device 1C that is common to the operation screen of the car device 25, there is an effect that the setting of the car security device 1C can be performed by a setting operation unified by the user. .

  In addition, by accumulating information such as the history of occurrence and time of occurrence of abnormalities in the storage medium of the car device 25 and enabling it to be displayed and output to the user, for example, the safety of the parking place can be statistically confirmed, Various safety measures can be taken, such as taking periodic measures by finding periodicity at the time of occurrence of an abnormality.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the car security devices 1, 1 </ b> B, and 1 </ b> C of the above-described embodiment, the purpose is to prevent roughing on the vehicle. For example, by adopting an acceleration sensor, an inclination sensor, or the like as the sensor 10, It can also be used for the purpose of preventing mischief. Further, a plurality of types of sensors may be mounted as the sensor 10, or a comparison process may be performed for each of the plurality of types of sensor outputs to determine whether an abnormality has occurred. In addition, the details shown in the embodiments can be appropriately changed without departing from the spirit of the invention.

It is a block diagram which shows the function structure of the car security apparatus of 1st Embodiment of this invention. It is a wave form diagram which shows an example of the time-sequential change pattern of the sensor output set to a condition setting part. It is a wave form diagram explaining the content of the comparison judgment process of the sensor output performed in a comparison judgment part. It is a data chart which shows an example of an illumination intensity data table. It is a block diagram which shows the function structure of the car security apparatus of 2nd Embodiment. It is a block diagram which shows the function structure of the car security apparatus of 3rd Embodiment.

Explanation of symbols

1, 1B, 1C Car security device 10 Sensor 11 Condition setting unit 12 Comparison determination unit 13 Warning notification unit 14 Release detection unit 15 Illuminance sensor 16 Time zone determination unit 17 Illuminance data table 21 First wireless device 22 Second wireless device 25 Car machine

Claims (3)

Detecting means for detecting a change in the state of the vehicle;
An alarm output means capable of outputting an alarm;
An abnormality determining means for determining the presence or absence of an abnormality based on the sensor output of the detecting means;
Alarm control means for causing the alarm output means to output an alarm when it is determined by the abnormality determination means that an abnormality has occurred;
An illuminance sensor for detecting brightness;
Time zone estimation means for estimating a current time zone based on the output of the illuminance sensor;
With
The alarm control means includes
The car security device characterized in that the mode of the alarm output is changed in accordance with the time zone estimated by the time zone estimation means. The alarm control means includes
A car security device characterized in that an output time length of the alarm output is changed according to the estimated time zone. The time zone estimating means includes
Timing means capable of timing for at least 24 hours;
A data table capable of storing at least 24 hours in association with output data of the illuminance sensor and timing data of the timing means;
The car security device according to claim 1 or 2, wherein the estimated time endurance is associated with the timing data based on a transition pattern of output data of the illuminance sensor in the data table.

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