JP2011031634A - Vehicle security system and vehicle security method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle security system and a vehicle security method which appropriately set a security level in a vehicle by performing, according to circumstances within the vehicle, variable control of detection sensitivity in a detection means for detecting an abnormal state of the vehicle that becomes a sign of theft in the vehicle. <P>SOLUTION: The vehicle security system 11 includes the detection means for detecting the abnormal state of the vehicle, such as an infrared ray sensor 13; a notification means for generating an alarm when the detection means detects the abnormal state of the vehicle, such as a horn 17; an information acquiring means for acquiring information of an article existing within the vehicle, comprising an IC tag reader 19 or the like; and a controller 12 as a control means for variably controlling the detection sensitivity of the abnormal state of the vehicle in the detection means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular security system and a vehicular security method installed in a vehicle in order to ensure security such as theft prevention in the vehicle.

  In general, this type of vehicle security system provides notification means when detecting an abnormal state of the vehicle (for example, approach of a suspicious person to the vehicle, occurrence of abnormal noise or vibration in the vehicle, etc.) that is a sign of theft in the vehicle. Is activated to issue an alarm. In such a vehicle security system, when fireworks are launched, for example, in the vicinity of the place where the vehicle is parked, a robbery is actually performed by detecting a loud sound of the fireworks. In spite of the absence, there is a possibility that a warning is issued by misjudging that the theft is being performed by breaking the window glass of the vehicle.

  For this reason, in order to prevent false reports in such a case, conventionally, a technique for automatically changing the detection sensitivity of a detection means for detecting an abnormal state of a vehicle as necessary is known. For example, in the vehicle security system described in Patent Document 1, information about whether there is an event that generates large-scale noise and vibration such as a fireworks display around the place where the vehicle is parked is searched, and such event information is obtained. Is obtained, the detection sensitivity of the detection means for detecting the abnormal state of the vehicle is set lower than normal.

JP 2007-106309 A

  By the way, in the conventional vehicular security system as described above, the detection sensitivity of the detection means is only corresponding to the situation outside the vehicle (for example, the presence or absence of a fireworks event) without considering any situation inside the vehicle. It has been changed. Therefore, when the vehicle is parked, there are no articles that are likely to be stolen such as valuables in the vehicle, and the detection sensitivity should be reduced to the situation outside the vehicle even when there is no need to increase the detection sensitivity of the detection means. Without a factor (such as a fireworks event), the detection sensitivity is maintained at a high level during normal times. On the other hand, even if it is desirable to increase the detection sensitivity of the detection means because valuable items such as valuable items are left in the vehicle, even if it is desirable to increase the detection sensitivity of the detection means, the detection sensitivity of the detection means is reduced to the situation outside the vehicle. When there is a factor (fireworks event or the like) to be caused, the detection sensitivity is set lower than normal. Therefore, the conventional vehicle security system has a problem that the security level in the vehicle cannot be appropriately set in accordance with the situation in the vehicle.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to variably control the detection sensitivity of detection means for detecting an abnormal state of the vehicle that is a sign of theft in the vehicle according to the situation in the vehicle. Accordingly, an object of the present invention is to provide a vehicle security system and a vehicle security method capable of appropriately setting a security level in a vehicle.

  In order to achieve the above object, the invention according to claim 1 relating to a vehicular security system and a detection means for detecting an abnormal state of the vehicle and an alarm when the detection means detects an abnormal state of the vehicle. An information acquisition unit that acquires information on an article existing in the vehicle, and a variable control of detection sensitivity of the abnormal state of the vehicle in the detection unit based on the information on the article acquired by the information acquisition unit And a control means for performing the above.

  According to this configuration, since the detection sensitivity of the detection unit can be variably controlled based on information on articles existing in the vehicle, it is possible to appropriately set the security level in the vehicle according to the situation in the vehicle. become able to.

  According to a second aspect of the present invention, in the vehicle security system according to the first aspect, the vehicle security system further includes an evaluation unit that evaluates the value of the article based on information on the article acquired by the information acquisition unit, and the control The means sets the level of the detection sensitivity so as to relatively correspond to the level of the value of the article evaluated by the evaluation means.

  According to this configuration, when the value of an article existing in the vehicle is high, the detection sensitivity for detecting an abnormal state of the vehicle that is a sign of theft is set higher than when the value of the article is low. The security level can be set to an appropriate level commensurate with the value of the articles present in the vehicle.

  According to a third aspect of the present invention, in the vehicular security system according to the first or second aspect, the information acquisition unit is configured such that the information transmission unit includes an information transmitter included in the article existing in the vehicle. A communication unit configured to perform information communication in order to acquire information, wherein the control unit is configured to increase the detection sensitivity based on information on the article received from the information transmitter by the information acquisition unit via the communication unit. It is characterized by variable control.

  According to this configuration, when an article existing in the vehicle has an information transmitter capable of transmitting information on the article to the outside, the information acquisition unit automatically transmits the information from the information transmitter via the communication unit. Therefore, it is possible to easily obtain information on the article, so that it is easy to obtain information on the article.

  According to a fourth aspect of the present invention, in the vehicular security system according to any one of the first to third aspects of the present invention, the vehicular security system further includes photographing means for photographing the inside of the vehicle, Information on an article existing in the vehicle is acquired based on a photographed image photographed by a photographing means.

  According to this configuration, since the information acquisition unit can acquire information on the article in the vehicle based on the photographed image taken by the photographing unit, the article existing in the vehicle does not have the information transmitter. However, the information acquisition means can automatically acquire information on the article.

  According to a fifth aspect of the present invention, in the vehicle security system according to the fourth aspect of the present invention, the vehicle security system further includes storage means for storing image information of a photographed image photographed by the photographing means, and the control means is configured to acquire the information acquisition If the information on the article acquired by the means is information on an article in which the image information of the photographed image is stored for a plurality of times determined in advance by the storage means, the information on the article is variably controlled in the detection sensitivity. Is characterized by being invalidated.

  According to this configuration, when the detection sensitivity is variably controlled based on information on articles existing in the vehicle, it is possible to exclude information on articles that are always left in the vehicle because there is no fear of theft. Therefore, the security level can be set more flexibly.

  On the other hand, the invention according to claim 6 according to the vehicle security method exists in the vehicle, a detection step of detecting an abnormal state of the vehicle, a notification step of issuing an alarm when the abnormal state of the vehicle is detected, and An information acquisition step of acquiring article information; and a control step of variably controlling the detection sensitivity of the abnormal state of the vehicle in the detection step based on the article information acquired in the information acquisition step. And According to this structure, the same effect as the vehicle security system according to claim 1 can be obtained.

The block diagram which shows the structure of the security system for vehicles of 1st Embodiment. The flowchart of the security sensitivity setting routine in 1st Embodiment. The block diagram which shows the structure of the vehicle security system of 2nd Embodiment. The flowchart of the security sensitivity setting routine in 2nd Embodiment.

(First embodiment)
Hereinafter, a first embodiment of a vehicle security system and a vehicle security method according to the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the vehicle security system 11 installed in the vehicle in the present embodiment variably controls the detection sensitivity (that is, security sensitivity) of the abnormal state of the vehicle that is a sign of theft in the vehicle. A control device 12 is provided as means. The control device 12 is electrically connected to an infrared sensor 13, an impact sensor 14, a sound pressure sensor 15, a gyro sensor 16, a horn (horn) 17, an alarm lamp 18, an IC tag reader 19, and an operation panel 20. Has been.

  The control device 12 is configured by a computer unit including a CPU 21, a ROM 22, a RAM 23, and the like. The CPU 21 performs various logical operations required for controlling the operating state of the vehicle security system 11 based on signal inputs from the sensors 13 to 16, the IC tag reader 19 and the operation panel 20. In the present embodiment, based on the signal input from at least one of the IC tag reader 19 and the operation panel 20, the CPU 21 detects each of the sensors 13 to 16 that detect an abnormal state of the vehicle that is a sign of theft in the vehicle. The sensitivity (security sensitivity) is variably controlled. The ROM 22 stores a security sensitivity control program executed by the control device 12 for variably controlling the security sensitivity in the vehicle security system 11. Further, the RAM 23 stores the calculation result of the CPU 21 and the like.

  The infrared sensor 13 detects whether a suspicious person approaches the vehicle or enters the vehicle, and outputs a detection signal to the control device 12. The impact sensor 14 detects an impact applied to the vehicle and outputs a detection signal to the control device 12. The sound pressure sensor 15 detects vibration and sound applied to the vehicle when the glass is broken, and outputs a detection signal to the control device 12. The gyro sensor 16 detects the inclination angle of the vehicle when the vehicle is taken away with the front wheel or the rear wheel lifted, and outputs a detection signal to the control device 12. In the present embodiment, these sensors 13 to 16 constitute detection means for detecting an abnormal state of the vehicle that is a sign of theft in the vehicle.

  The horn 17 operates based on a control signal input from the CPU 21 of the control device 12, and issues an alarm such as a horn or a buzzer sound around the vehicle. The alarm lamp 18 operates based on a control signal input from the CPU 21 of the control device 12, and issues an alarm due to blinking of light or the like around the vehicle. In the present embodiment, the horn 17 and the alarm lamp 18 constitute a notification unit that issues a warning when the detection unit including the sensors 13 to 16 detects an abnormal state of the vehicle that is a sign of theft. Yes.

  The IC tag reader 19 is disposed in the vehicle cabin. The IC tag reader 19 functions as a communication unit that performs information communication with the IC tag 24 serving as an information transmitter incorporated in an article existing in the passenger compartment, so that information on the article, specifically Specifically, information including identification information such as an article name and value information such as an evaluation amount is automatically received, and the received article information is output to the control device 12. In the present embodiment, the IC tag reader 19 and the CPU 21 constitute information acquisition means for acquiring information on articles existing in the vehicle.

  In the case of the present embodiment, the operation panel 20 also serves as a touch panel display screen in a navigation device (not shown) installed in the passenger compartment of the vehicle. On the operation panel 20, the current setting level of the detection sensitivity (security sensitivity) for detecting the abnormal state of the vehicle in each of the sensors 13 to 16 is displayed so as to be visible, and the setting level is a touch operation. It is possible to change the setting. Furthermore, information (article name, evaluation price, etc.) of articles (including navigation devices) existing in the vehicle can be manually input from the operation panel 20 by a touch operation.

  Next, a flowchart shown in FIG. 2 is a security sensitivity setting routine executed by the control device 12 in order to variably control the detection sensitivities of the sensors 13 to 16 that detect an abnormal state of the vehicle in the vehicle security system 11 of the present embodiment. Based on

  When the control device 12 detects that the engine of the vehicle has stopped based on an output signal from an ignition switch (not shown), the control device 12 starts processing of a security sensitivity setting routine for setting the security sensitivity of the vehicle security system 11. . First, in step S11, the control device 12 determines whether or not the vehicle door is locked based on an output signal from a door lock device (not shown). If it is determined that the door is not locked (step S11: NO), the process of step S11 is periodically repeated until it is determined that the door is locked (step 11: YES).

  On the other hand, if it is determined that the door is locked (step 11: YES), the process proceeds to the next step S12, and the control device 12 acquires information on the article existing in the vehicle. . Specifically, an IC tag built-in article (for example, an expensive bag, a wallet, a coat, a portable personal computer, etc.) left around the seat in the passenger compartment at that time, or an in-vehicle article (for example, a navigation device) installed in the passenger compartment. Etc.) (item name as identification information and evaluation amount as value information).

  Here, it is assumed that information on the product is always transmitted from the IC tag 24 of the product with a built-in IC tag. Therefore, the control device 12 receives the information of the IC tag built-in article transmitted from the IC tag 24 by the IC tag reader 19 and stores the received information in the RAM 23 to automatically obtain the information of the IC tag built-in article. To get to. Further, regarding the information on the in-vehicle article, if the in-vehicle article is a standard equipment item from the manufacturing stage in the vehicle, the information on the article is stored in the ROM 22 in advance. On the other hand, when the in-vehicle article is a retrofit item retrofitted after purchase by the user, information on the article can be manually input from the operation panel 20 by the user, and the input information is stored in the RAM 23. And Therefore, the control device 12 automatically acquires the information on the in-vehicle article by reading the storage contents of the ROM 22 and the RAM 23. Note that the control device 12 aggregates information on the articles acquired in this way and temporarily stores the information in the RAM 23.

  Then, in step S13, the control device 12 evaluates the total value of the articles existing in the vehicle based on the acquired article information. In this respect, the control device 12 functions as an evaluation unit that evaluates the value of the article based on the acquired article information. For example, when the IC tag built-in article is a wallet and the vehicle-mounted article is a navigation device for retrofit equipment, the control device 12 uses the total amount of the evaluation price of the wallet and the evaluation price of the navigation device as the total value of the article. And the calculated total amount is temporarily stored in the RAM 23.

  Next, in step S14, the control device 12 determines whether or not the total value of the articles is higher than a predetermined threshold value. Note that the threshold value in this case is a value that serves as a criterion for variably controlling the setting level of the detection sensitivity (security sensitivity) of each of the sensors 13 to 16 and is stored in the RAM 23 in advance. The threshold value stored in the RAM 23 as described above can be changed by a touch operation from the operation panel 20 as necessary.

  When the control device 12 determines in step S14 that the total value of the articles is higher than the threshold (step S14: YES), the control device 12 proceeds to step S15, and the sensors 13 to 13 serving as detection means. 16, the detection sensitivity of the abnormal state of the vehicle is set to a high level, which is a normal setting level, and this routine ends. On the other hand, when it is determined that the total value of the articles is not higher than the threshold (step S14: NO), the control device 12 normally sets the detection sensitivity of the abnormal state of the vehicle in each of the sensors 13 to 16 serving as detection means. Set to a low level lower than the current setting level, and this routine ends.

  Then, the effect | action of the vehicle security system of this embodiment comprised as mentioned above next is demonstrated. As a premise for explanation, a leather bag with an evaluation value of 50,000 yen is left as an IC tag built-in article in the vehicle interior of the vehicle, and a navigation device with an evaluation value of 30,000 yen is installed in the vehicle interior as an in-vehicle article. It shall be equipped with the appendix. Further, it is assumed that a value of 50,000 yen is set and stored in the RAM 23 as a threshold value used as a determination criterion in setting the detection sensitivity level.

  Now, after the engine of the vehicle is stopped, when the door is locked in order for the user (driver) to leave the vehicle, the control device 12 of the vehicular security system 11 will store information on the IC tag built-in items left in the vehicle. And the information of the vehicle-mounted goods equipped in the passenger compartment is acquired (information acquisition stage). Then, the total value of the articles existing in the vehicle is evaluated based on the acquired article information.

  In this case, the IC tag reader 19 communicates information with the IC tag 24 of the leather bag, which is an IC tag built-in article, so that the identification information indicating that the article name is a leather bag and the article (leather) The information of the IC tag built-in item including the value information indicating that the evaluation amount of the (made bag) is 50,000 yen is automatically acquired. Further, the CPU 21 reads the information of the retrofit equipment from the RAM 23, so that the identification information indicating that the article name is the navigation device and the evaluation price of the article (the retrofit equipment navigation device) is 30,000 yen. The information on the in-vehicle article consisting of the value information indicating is automatically acquired. Then, a total amount of 80,000 yen, which is the sum of the evaluation amount of 50,000 yen for the leather bag and the evaluation amount of 30,000 yen for the navigation device, is temporarily stored in the RAM 23 as the total value of articles existing in the vehicle.

  Then, it is then determined whether or not the total value (80,000 yen) of this article is higher than the threshold value (50,000 yen) set and stored in the RAM 23. In this case, since “total value of articles (80,000 yen)> threshold value (50,000 yen)”, the detection sensitivity of each of the sensors 13 to 16 is set to a high level that is a normal setting level by the control device 12. Set (control stage). For example, in the case of the infrared sensor 13, in the state where the detection sensitivity is set to a low level, an abnormal state detection signal is not output unless the suspicious person approaches an area within 1 m from the vehicle, whereas the detection sensitivity is set to a high level. By setting, when a suspicious person approaches an area within 2 m from the vehicle, an abnormal state detection signal is output (detection stage). That is, the level (security level) for preventing theft from occurring is improved by detecting the abnormal state of the vehicle that is a sign of theft in the vehicle. When the approach of the suspicious person is detected as an abnormal state of the vehicle by the infrared sensor 13 as described above, the horn 17 sounds a horn and the alarm lamp 18 blinks so that an alarm is generated around the vehicle. (Notification stage).

  Similarly, in the case of the impact sensor 14, the sound pressure sensor 15, and the gyro sensor 16, the detection sensitivity of each of the sensors 14, 15, 16 is set to a high level, thereby preventing theft in the vehicle. The level (security level) will be improved. That is, in the case of the impact sensor 14, an abnormal state detection signal is output when a smaller impact force is detected than when the detection sensitivity is low. In the case of the sound pressure sensor 15, an abnormal state detection signal is output when a smaller vibration or sound is detected than when the detection sensitivity is low. Furthermore, in the case of the gyro sensor 16, an abnormal state detection signal is output when a smaller inclination angle is detected than when the detection sensitivity is low.

  On the other hand, when an article is not left in the vehicle, or an evaluation value of the article left in the vehicle is less than 20,000 yen, an article existing in the vehicle (a navigation device with an evaluation price of 30,000 yen) If the total value of the sensors 13 to 16 does not exceed the threshold value of 50,000 yen, the control device 12 sets the detection sensitivity of each of the sensors 13 to 16 to a low level that is lower than the normal setting level (high level). Is done. Therefore, since the detection sensitivity in each of the sensors 13 to 16 is not set high, the power consumption is also low, and the battery consumption is reduced. According to the first embodiment, the following effects can be obtained.

  (1) In the vehicle security system 11 of the present embodiment, information on articles existing in the vehicle is acquired regardless of the situation outside the vehicle (for example, the presence or absence of an event such as a fireworks display), and thus acquired. Based on the information on the article, the detection sensitivity of the detection means (each sensor 13 to 16) for detecting an abnormal state of the vehicle that is a sign of theft in the vehicle is variably controlled. For this reason, the security level in the vehicle can be appropriately set according to the situation in the vehicle, such as whether there is an article that may be stolen in the vehicle.

  (2) In the vehicle security system 11 of the present embodiment, the total value of the articles present in the vehicle represented by the evaluation price of each article is higher than a threshold value that is a criterion for determining the level of the security level. Whether or not is determined by the control device 12. If the determination result is affirmative (total value of articles> threshold), the detection sensitivity level of each of the sensors 13 to 16 is set to a high level, and the opposite negative determination (total value of articles ≦ In the case of (threshold value), the level of detection sensitivity of each of the sensors 13 to 16 is set to a low level. Accordingly, the value of the article existing in the vehicle is objectively determined, and the detection sensitivity of each of the sensors 13 to 16 serving as detection means is set so as to relatively correspond to the value. It is possible to set an appropriate level corresponding to the value of the article existing in the vehicle.

  (3) In the vehicle security system 11 of the present embodiment, information on the article existing in the vehicle, and in the case of an article with an IC tag, transmission information from the IC tag 24 built in the article is used as a communication unit. A functioning IC tag reader 19 receives the received information. For this reason, when the article present in the vehicle has the IC tag 24, the article information can be automatically acquired based on the transmission information from the IC tag 24. Becomes simple.

  (4) In the vehicle security system 11 of the present embodiment, information on articles existing in the vehicle can be input from the operation panel 20 by a touch operation. For this reason, for example, navigation devices that are retrofitted after purchase of a vehicle by a user, or articles that do not have an IC tag 24 built in, can be controlled by manually inputting information (article names and evaluation amounts) of those articles. The apparatus 12 can be used for determining the value of an article present in the vehicle.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, in contrast to the first embodiment, the vehicle security system 11 includes a camera 25 as a photographing unit instead of the IC tag reader 19, and is based on information on an article photographed by the camera 25. The difference is that the security sensitivity is set, and the other configuration is almost the same as that of the first embodiment. Therefore, in the following, differences from the first embodiment will be mainly described, the same components are denoted by the same reference numerals, and redundant description thereof will be omitted.

  As shown in FIG. 3, the vehicle security system 11 of this embodiment is a camera as a photographing means instead of the IC tag reader 19 included in the vehicle security system 11 of the first embodiment shown in FIG. 25. The camera 25 uses a portion seen from outside the vehicle through a vehicle window on the passenger seat or the rear seat in the vehicle as a photographing range, and outputs image information of articles photographed within the photographing range to the control device 12. In the control device 12, every time image information of an article is input from the camera 25, the CPU 21 that constitutes an information acquisition unit together with the camera 25 stores the image information in a RAM 23 as a storage unit. At that time, in the control device 12, the CPU 21 reads the image information of the article already stored in the RAM 23, and each sensor 13 as a detection unit based on the read image information and the image information captured by the camera 25. The detection sensitivity of ˜16 is variably controlled.

  Next, a flowchart shown in FIG. 4 shows a security sensitivity setting routine executed by the control device 12 in order to variably control the detection sensitivities of the sensors 13 to 16 that detect an abnormal state of the vehicle in the vehicle security system 11 of the present embodiment. Based on

  As in the case of the first embodiment, the control device 12 sets the security sensitivity of the vehicle security system 11 when detecting that the vehicle engine has stopped based on an output signal from an ignition switch (not shown). The security sensitivity setting routine processing for the system is started. First, in step S21, the control device 12 determines whether or not the vehicle door is locked based on an output signal from a door lock device (not shown), and the door lock is not yet done (step S21: NO). If it is determined, the process of step S21 is periodically repeated until it is determined that the door is locked (step 21: YES).

  On the other hand, if it is determined that the door is locked (step 21: YES), the process proceeds to the next step S22, and the control device 12 captures a preset photographing range in the vehicle interior by the camera 25. Let And the information of the article | item which exists in the vehicle is acquired based on the image information of the picked-up image. Specifically, image information of an article (for example, a leather bag) left on the passenger seat or the rear seat in the passenger compartment at that time is output from the camera 25 to the control device 12. Note that the image information output from the camera 25 to the control device 12 is binarized and stored in the RAM 23.

  In the next step S23, the control device 12 determines whether or not the image information of the same article as the article image information stored in the RAM 23 in the previous step S22 is already stored in the RAM 23. If it is determined that the image information of the article has already been stored in the RAM 23 (step S23: YES), the control device 12 stores the image information of the article in the RAM 23 in a predetermined number of times (step S24). For example, it is determined whether or not the data has been stored over two times.

  If it is determined that the image information of the article has been stored in the RAM 23 for a predetermined number of times (for example, twice) or more (step S24: YES), the control device 12 proceeds to the next step S25. To do. In the next step S25, the control device 12 sets the detection sensitivity of the abnormal state of the vehicle in each of the sensors 13 to 16 serving as detection means to a low level lower than the normal setting level, and ends this routine. .

  On the other hand, if a negative determination is made in the previous step S23 and step S24 (step S23: NO, step S24: NO), the control device 12 proceeds to step S26. In step S26, the control device 12 sets the detection sensitivity of the abnormal state of the vehicle in each of the sensors 13 to 16 serving as detection means to a high level that is a normal setting level, and ends this routine.

  Then, the effect | action of the vehicle security system of this embodiment comprised as mentioned above next is demonstrated. As a premise for explanation, it is assumed that a leather bag is left on the passenger seat in the passenger compartment. Further, it is assumed that the image information of the leather bag has already been stored twice in the RAM 23.

  Now, after the engine of the vehicle is stopped, when the door is locked in order for the user (driver) to leave the vehicle, the control device 12 of the vehicle security system 11 acquires information on the articles left in the vehicle. (Information acquisition stage). In this case, the camera 25 shoots a leather bag, which is an article left on the passenger seat, and the image information is output to the control device 12 so that the control device 12 is left in the vehicle interior. Get information about.

  Then, the control device 12 determines whether or not the same image information as the image information of the article output from the camera 25 is already stored in the RAM 23. In this case, since the image information of the leather bag is stored twice in the RAM 23, the article (leather bag) is always left in the vehicle because there is no fear of theft. When the detection sensitivity of each of the sensors 13 to 16 is variably controlled at that time, image information obtained by photographing the article (leather bag) is invalidated.

  As a result, assuming that there is no article that may be stolen in the vehicle, the detection sensitivity of each of the sensors 13 to 16 for detecting the abnormal state of the vehicle is set to a low level lower than normal (control stage). ). On the other hand, if the image information of the leather bag photographed by the camera 25 is not stored in the RAM 23, or if it is stored, it is less than a predetermined threshold number (2 times), the user Assuming that there is an article that has been misplaced and that is likely to be stolen, the detection sensitivities of the sensors 13 to 16 are set to the same high level as in normal times.

  When the abnormal state of the vehicle that is a sign of theft in the vehicle is detected by the sensors 13 to 16, detection signals are output from the sensors 13 to 16 to the control device 12 as in the case of the first embodiment. (Detection stage). And when the detection signal from each sensor 13-16 is output to the control apparatus 12, while the horn 17 sounds a horn, the alarm lamp 18 blinks, and an alarm comes to the surroundings of a vehicle (notification step) ).

According to the second embodiment, the following effects can be obtained.
(5) In the security system 11 according to the present embodiment, the camera 25 arranged in the vehicle takes an image of an article present in the vehicle, and the control device 12 determines whether the article in the vehicle is in accordance with image information of the imaged article. Since information can be acquired, information on an article can be automatically acquired even if the article present in the vehicle does not have an information transmitter such as an IC tag.

  (6) In the vehicle security system 11 of the present embodiment, the image information of the article photographed by the camera 25 is stored in the RAM 23 of the control device 12. When the article information acquired from the image information is the same as the article information already stored in the RAM 23 for a predetermined number of times, the control device 12 changes the detection sensitivity of the article image information. It can be invalidated when used as a control criterion. In other words, it is determined that such an article is an article that is normally left in the passenger compartment because there is no fear of theft. For this reason, when variably controlling the detection sensitivity based on information on articles existing in the vehicle, it is possible to exclude information on articles that are always left in the vehicle because there is no fear of theft, and more appropriate security. You can set the level.

In addition, you may change each said embodiment as follows.
In each of the above embodiments, when the detection sensitivity is variably controlled, only the detection sensitivity of some sensors (for example, infrared sensors) in a plurality of sensor groups may be variably controlled. Furthermore, the detection sensitivity of the entire sensor group may be variably controlled by stopping the operation of only some of such sensors.

  In the first embodiment, the detection sensitivity setting level may be variably controlled to multiple levels, such as providing a medium level between the high level and the low level according to the value level of the total value of the articles. Good.

  In the first embodiment, the camera 25 is further provided in addition to the IC tag reader 19, and the detection sensitivity is variably controlled in consideration of the evaluation result of the total value of the articles existing in the vehicle and the photographed image information. You may do it.

In each of the above embodiments, the detection sensitivity may be variably controlled depending on whether or not the number of articles left on the vehicle is equal to or greater than the threshold number.
In the second embodiment, the detection sensitivity may be set to a low level when the image information of the article taken by the camera 25 is stored in the RAM 23 even once.

  In the second embodiment, the detection sensitivity may be set to a low level when the image information of the article photographed by the camera 25 is stored in the RAM 23 a plurality of times other than twice.

  DESCRIPTION OF SYMBOLS 11 ... Vehicle security system, 12 ... Control apparatus (control means) which functions as evaluation means, 13 ... Infrared sensor (detection means), 14 ... Impact sensor (detection means), 15 ... Sound pressure sensor (detection means), 16 ... Gyro sensor (detection means), 17 ... horn (notification means), 18 ... alarm lamp (notification means), 19 ... IC tag reader (communication unit) constituting information acquisition means, 21 ... CPU constituting information acquisition means , 23... RAM (storage means), 24... IC tag (information transmitter), 25.

Claims (6)

Detecting means for detecting an abnormal state of the vehicle;
Informing means for issuing an alarm when the detecting means detects an abnormal state of the vehicle;
Information acquisition means for acquiring information of articles existing in the vehicle;
A vehicle security system comprising: control means for variably controlling the detection sensitivity of the abnormal state of the vehicle in the detection means based on information on an article acquired by the information acquisition means. An evaluation unit that evaluates the value of the article based on the information of the article acquired by the information acquisition unit;
The vehicle security system according to claim 1, wherein the control unit sets the level of the detection sensitivity so as to relatively correspond to the level of the value of the article evaluated by the evaluation unit. . The information acquisition means includes a communication unit that performs information communication with an information transmitter included in an article present in the vehicle to acquire information on the article.
The control means variably controls the detection sensitivity based on information on the article received by the information acquisition means from the information transmitter via the communication unit. The vehicle security system described. It further comprises photographing means for photographing the inside of the vehicle,
The vehicle security system according to any one of claims 1 to 3, wherein the information acquisition unit acquires information on an article existing in the vehicle based on a captured image captured by the imaging unit. A storage means for storing image information of a photographed image photographed by the photographing means;
When the information on the article acquired by the information acquisition means is information on an article in which the image information of the photographed image is stored a plurality of times determined in advance by the storage means, the control means 5. The vehicle security system according to claim 4, wherein the information is invalidated in the variable control of the detection sensitivity. A detection stage for detecting an abnormal state of the vehicle;
A notification stage for issuing an alarm when an abnormal state of the vehicle is detected;
An information acquisition step of acquiring information on an article existing in the vehicle;
A vehicle security method comprising: a control step of variably controlling the detection sensitivity of the abnormal state of the vehicle in the detection step based on information on the article acquired in the information acquisition step.

Images