JPH11304523A - Security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a security system capable of easily confirming a place where abnormality is generated. SOLUTION: At the time of detecting the abnormality of a vehicle, a security device 10 prepares security data including information relating to the abnormality and transmits them to a navigation device 20. The navigation device 20 stores the received security data together with present vehicle position data and prepares alarm information data based on the data. Also, at the time of displaying a map by using a display device 30, the navigation device 20 superimposes a prescribed mark corresponding to an abnormality generated place on a map image and displays it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a security system for preventing theft or mischief of a vehicle or the like.

[0002]

2. Description of the Related Art Security systems for protecting vehicles from theft and mischief have been known. For example, when the user operates the remote control (remote control) unit at hand when the user leaves the vehicle and starts the security system, an abnormal state detection operation using various sensors provided in the vehicle is started. After that, when the suspicious person approaches the vehicle and tries to open the door or shocks the vehicle, the security system will sound the siren for a certain period of time and blink the light to catch the eyes and distract the suspicious person It has become. Further, when such a predetermined warning operation is performed, an LED (light emitting diode) provided in the security system blinks intermittently to notify a user returning to the vehicle that there is an abnormality. Has become. At this time, the LED blinks in a different pattern according to the type of the sensor that has detected the abnormality, and the user can determine which sensor has detected the abnormality by the blinking pattern of the LED, that is,
It is possible to know what kind of abnormality has occurred.

On the other hand, in recent years, on-vehicle navigation devices have become widespread. The navigation device has a function of detecting the current position of the vehicle and displaying a map in the vicinity of the current position on a screen, and a function of searching for and guiding an optimal route to a destination.

[0004]

By the way, in the conventional security device, the user is notified of what kind of abnormality has occurred by the blinking pattern of the LED. Without remembering the blinking pattern, it was possible to confirm that an abnormality had occurred, but not to know the details of the abnormality that occurred.

[0005] Further, it is often the case that a user wants to travel around a place where an abnormality has occurred in a vehicle, or to park around a place where an abnormality has occurred. However, when a conventional navigation device is used to reflect the content of an abnormality that has occurred on a map or to perform a route search that takes into account the location where the abnormality has occurred, the user must remember the location of the abnormality each time. The location must be registered with a remote control unit or the like, the operation is complicated, and it is not easy to reflect an abnormal state detected by the security system on the navigation operation.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide a security system which can easily confirm a place where an abnormality has occurred. Another object of the present invention is to provide a security system capable of easily reflecting a detected abnormal state on a navigation operation.

[0007]

In order to solve the above-mentioned problems, a security system according to the present invention displays a display screen of a navigation device when an abnormal state caused by a factor applied from outside the vehicle is detected. The vehicle position information at the time of occurrence of the abnormality is displayed together with the information on the abnormal state, so that the position at which some abnormality has occurred can be easily confirmed.

[0008] Further, the security system of the present invention comprises:
Since warning history information including information on an abnormal state caused by a factor added from outside the vehicle, information on a warning operation performed when the abnormality occurs, and information on a position of the vehicle at the time of the occurrence of the abnormality is generated, the warning is generated. It is easy to perform a navigation operation reflecting the history information. It is preferable that the navigation operation that reflects the warning history information includes a map information display operation and a route search operation. By displaying detailed information such as the abnormal state that occurred on the map image in association with the position of the vehicle at the time of occurrence of the abnormality, it is possible to easily confirm the place where the abnormality is likely to occur, and avoid traveling in that place or area And other measures can be taken. In particular, by performing a route guidance operation in consideration of detailed information such as an abnormal state that has occurred, a place or an area where an abnormality is likely to occur can be reliably avoided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A security system according to an embodiment of the present invention is applied when a vehicle abnormality occurs.
It is characterized in that information on the abnormality is displayed on the screen of the navigation device, and the location where the abnormality occurs is reflected in a navigation operation such as a route search. Hereinafter, a security system according to an embodiment will be described with reference to the drawings.

(1) Configuration of Security System FIG. 1 is a diagram showing an overall configuration of a security system according to an embodiment to which the present invention is applied. The security system shown in the figure includes a security device 10 that detects an abnormal state caused by a factor added from outside the vehicle and issues a predetermined warning, a navigation device 20 that performs a navigation operation such as a route search, and a position of the vehicle. And a display device 30 for displaying detailed information on the surrounding map image and the abnormal state that has occurred.

The security device 10 collects information from sensors (described later) attached to various parts of the vehicle, determines whether or not an abnormality has occurred in the vehicle, and if it determines that an abnormality has occurred, The information about the abnormality that has occurred is transmitted to the navigation device 20, and a predetermined warning is output and the vehicle cannot be driven.

FIG. 2 is a diagram showing a detailed configuration of the security device 10. Security device 10 shown in FIG.
Is a sensor unit 100, a control unit 110, a siren 120,
It includes a headlight 130, a starter device 140, and an LED (light emitting diode) 150.

The sensor unit 100 includes a door switch 101 for monitoring the opening and closing of a door, a hood / trunk switch 102 for monitoring the opening and closing of a hood and a trunk, an ignition switch 103 for monitoring the ON / OFF state of an ignition, and a vehicle interior. Alternatively, it is provided with a radar sensor 104 for monitoring whether there is a moving object in the vicinity, and an impact sensor 105 for monitoring vibration of the vehicle. Sensor part 1
These various switches and sensors included in 00 monitor the presence or absence of an abnormality occurring in the vehicle.

When an abnormality detection function of the security device 10 is activated by a user, the control unit 110 digitizes analog detection signals output from various switches and various sensors included in the sensor unit 100 as needed. The state of the vehicle is determined based on the state change of the converted detection signal.

When any abnormality occurs in the vehicle, the control unit 110 creates security data including information relating to the abnormality and generates the security data.
Send to Further, the control unit 110 sounds the siren 120 for a predetermined time or blinks the headlights 130 in order to disperse the suspicious person. Further, the control unit 110
The operation of the control circuit of the starter device 140 is stopped so that the engine cannot be started even if a suspicious person gets into the vehicle. Further, the control unit 110 intermittently blinks the LED 150 to notify a user who has returned to the vehicle that an abnormality has occurred in the vehicle.

The navigation device 20 performs navigation operations such as route search, route guidance, and map display control, and creates warning information data based on the security data received from the security device 10.

FIG. 3 is a diagram showing a detailed configuration of the navigation device 20. Navigation device 2 shown in FIG.
Reference numeral 0 denotes a reception memory 210 that temporarily stores security data and the like received from the security device 10, a vehicle position detection unit 220 that detects a vehicle position, and a navigation operation such as a map display or a route search. CD-R that reads a CD-ROM on which map data is recorded
The OM reader 230, a map data memory 240 for temporarily storing the read map data, and an arithmetic operation required for navigation operations such as map display and route search, and security data and the like stored in the reception memory 210. Control unit 250 that creates warning information data based on
And a memory 2 used as a work area when the arithmetic processing is performed by the control unit 250 and storing the arithmetic result.
60, and a warning information memory 270 for storing warning information data created by the control unit 250.

The receiving memory 210 stores the security device 1
The security data received from 0 is stored together with the vehicle position data output from the vehicle position detection unit 220. The security data is normally sent from the security device 10 when the vehicle is parked with the engine stopped, and when the power of the navigation device 20 is off. Even in such a case, it is assumed that the security data can be stored.

The vehicle position detecting section 220 includes, for example, an autonomous navigation sensor having a direction sensor and a distance sensor, a GPS receiver, and the like, and detects or calculates an accurate position of the vehicle at a predetermined timing as needed. The vehicle position data is output to the reception memory 210 and the control unit 250. Note that, similarly to the reception data memory 210, the own-vehicle position detection unit 220 is also in a state where the own-vehicle position can be detected even when the power of the navigation device 20 is off.

The control unit 250 performs navigation operations such as map display, route search, and route guidance. For example, the control unit 250 reads map data in a predetermined range around the own vehicle from the map data memory 240 based on the own vehicle position data output from the own vehicle position detection unit 220 and creates a map image. The image is displayed on the display device 30 together with the vehicle position mark. Further, at the time of the route search, the control unit 250 reads map data in a predetermined range from the departure point to the destination, searches for an optimal route by a route search method such as the Dijkstra method or the horizontal search method, and searches for the optimum result. Is stored in the memory 260 as guidance route data. Further, at the time of route guidance, the control unit 250 reads the guidance route data from the memory 260 and displays the route overlaid on a map image, or guides the traveling direction by voice at an intersection to reach the destination. invite.

When the power of the navigation device 20 is turned on, the control unit 250 reads out the security data stored in the reception memory 210 and the corresponding vehicle position data, creates warning information data, and generates warning information. It is stored in the memory 270. Further, the control unit 250 reflects the created warning information data on a navigation operation such as map display or route guidance. For example, an image showing details of the warning information data is created, and the display device 3
Displayed as 0. When a map is displayed on the display device 30, a location where an abnormality has occurred in the vehicle (hereinafter referred to as a “warning / caution point”) is displayed on the display device 30 with a predetermined mark superimposed on the map image. You. In the route search, a route search that bypasses the warning / caution point is performed.

The above-described sensor unit 100 and control unit 11
0 corresponds to the abnormality detecting means, the own vehicle position detecting section 220 corresponds to the own vehicle position detecting means, and the control section 250 corresponds to the display controlling means. The control unit 110, the siren 120, the headlight 130, the starter device 140, and the LED 150
Corresponds to warning means, the warning information memory 270 corresponds to warning history information storage means, and the navigation device 20 and the display device 30 correspond to navigation processing means. Also, the warning information data corresponds to the warning history information. (2) Operation of Security System The security system of the present embodiment has the above-described configuration, and the operation will be described next. First, an operation when an abnormality occurs in the vehicle due to a factor applied from the outside will be described. FIG. 4 is a flowchart showing an operation procedure of the security system when an abnormality occurs.

When the engine is stopped by the user and the abnormality detection function of the security device 10 is started, the control unit 110 controls the sensor unit 100 (switches 101 to 103).
And the output signals of the sensors 104 and 105) are detected (step 300), and based on the detection signals, it is determined whether or not an abnormality has occurred in the vehicle (step 301). Specifically, the control unit 110 includes a door switch 101, a hood / trunk switch 102, an ignition switch 103
When the abnormality determination of the vehicle is performed based on the detection signal output from the ECU, the determination is made in two stages of a "normal" state and a "warning" state. Further, the control unit 110 includes the radar sensor 104,
When the abnormality determination of the vehicle is performed based on the detection signal output from the impact sensor 105, a “normal” state,
In addition to the “warning” state, the determination is made in three stages of the “caution” state, which means that the state does not reach the “warning” state but needs attention. For example, the control unit 110 determines “warning” when the radar sensor 104 detects a moving object inside the vehicle, and determines “caution” when detecting an object moving around the vehicle. The control unit 110 determines “warning” when a large vibration is detected by the impact sensor 105, and determines “caution” when a small vibration is detected.

When an abnormality occurs in the vehicle (when it is determined that the vehicle is in the “warning” state or the “caution” state and the affirmative determination is made in step 301), control unit 110 controls siren 120 to stop. Driving and sounding, flashing the headlight 130 and LED 150,
Starter device 1 to prevent the engine from starting
The operation of the control circuit 40 is stopped (step 30).
2).

Next, the control unit 110 creates security data and sends it to the navigation device 20 (step 303). FIG. 5 shows the contents of the security data. As shown in the figure, the security data includes a “vehicle state code” indicating the state of the vehicle and a “sensor type code” indicating the type of the switch or sensor of the sensor unit 100 that has detected the abnormality. For example, a code such as "1" is assigned to the "vehicle status code" if the determined vehicle status is "warning", and "2" if the determined vehicle status is "caution". The “sensor type code” is assigned a code such as “1” for the door switch 101 and “5” for the impact sensor 105.

When the security data thus created is sent to the navigation device 20, the reception memory 210 in the navigation device 20 sends the security data together with the vehicle position data output from the vehicle position detection unit 220. Stored security data (step 3
04).

FIG. 6 is a diagram showing the contents of the vehicle position data output from the vehicle position detector 220. As shown in the figure, the own vehicle position data is composed of “longitude / latitude” indicating the longitude and latitude of the own vehicle, and “detection time” indicating the date and time when the own vehicle position was detected. I have. As described above, the reception memory 210 and the vehicle position detection unit 220 are operable even when the power of the navigation device 20 is off. However, since activation of the abnormality detection function of the security device 10 of the present embodiment means that the vehicle is in a stopped state, it is necessary to detect the position of the own vehicle each time by a GPS receiver or an autonomous navigation sensor. No, own vehicle position detection unit 220
It is only necessary to hold the own vehicle position data when the engine is stopped, and output the held own vehicle position data to the reception memory 210 when an abnormality occurs.

As described above, when any abnormality occurs in the vehicle, the control unit 110 in the security device 10 creates security data for the generated abnormality and stores the security data in the reception memory 210 in the navigation device 20. Stored each time.

Next, the operation when the power of the navigation device 20 is turned on will be described. FIG. 7 is a flowchart showing the operation procedure of the navigation device 20 when the power is turned on.

When the user cancels the abnormality detection function of the security device 10 and turns on the navigation switch 20 by turning on the ignition switch, the control unit 250 transmits the security data stored in the reception memory 210 to the The corresponding vehicle position data is read (step 400).

Next, the control unit 250 creates warning information data based on the read data (step 401). FIG. 8 is a diagram showing the contents of the warning information data. As shown in the figure, the warning information data includes “vehicle state code” and “sensor type code” included in the security data shown in FIG. 5 and “longitude / longitude” included in the own vehicle position data shown in FIG. It is composed of “latitude” and “detection time”, and “detour flag”. The detour flag is a flag indicating whether or not to detour a warning / caution point corresponding to this warning information data when searching for a route. For example, if “0” does not detour, “1”
Correspond to each other, and “1” is set as an initial value when the warning information data is created. next,
The control unit 250 stores the created warning information data in the warning information memory 270 (Step 402).

As described above, when the navigation device 20 is powered on, the security data stored in the reception memory 210 and the corresponding vehicle position data are read, and the warning information data is created. To be
The navigation device 20 can obtain detailed information on the abnormal state of the vehicle detected by the security device 10 and can easily reflect the information on the navigation operation.

Next, a navigation operation reflecting the created warning information data will be described. First, the operation of displaying the contents of the warning information data on the screen will be described. FIG. 9 is a flowchart showing the operation procedure of the navigation device when displaying the contents of the warning information data.

The control section 250 determines whether or not the user has operated a remote control unit (not shown) to instruct display of the contents of the warning information data (step 500). When the display of the content of the warning information data is instructed, the control unit 250 creates an image of “warning / caution point list” based on the warning information data stored in the warning information memory 270, and 30 is displayed (step 501).

FIG. 10 is a diagram showing a display example of a warning / caution point list. As shown in the figure, in the displayed list of warning / caution points, “warning points” and “caution points” are classified and shown. The control unit 250 searches for the “vehicle state code” of the warning information data, and displays the warning / caution points separately as “warning points” and “caution points”.

Next, the control unit 250 determines whether or not the user has operated a cursor on the remote control unit, for example, and selected one of a list of warning / caution points (step 502). When any of the warning / caution points is selected, the control unit 250 creates a “warning information” image or a “caution information screen” based on the corresponding warning information data, and
(Step 503).

FIG. 11 is a view showing a display example of the warning information screen, and shows a case where the warning point "A1" is selected from the warning / caution point list shown in FIG. As shown in FIG. 11, the warning information screen includes a title area 550, a detection sensor display area 551 indicating a sensor or a switch that has detected an abnormality, a detection date and time display area 552 indicating a date when an abnormality has been detected, and an error detection area. A detection position display area 553 indicating the location (longitude / latitude) of the selected point, a detour selection area 554 indicating selection information as to whether or not to bypass the warning point during route search, and a sensor sensitivity setting area 555 indicating the set contents of the sensor sensitivity include.

The content of the title area 550 is determined by the "vehicle status code" of the warning information data. For example, when a code corresponding to “warning” is set, “warning information” is displayed, and when a code corresponding to “caution” is set, “caution information” is displayed.
The abnormal sensor display area 551 is determined by the “sensor type code” of the warning information data. For example, when a code corresponding to the impact sensor 105 is set, "impact sensor" is displayed. In the detection date / time display area 552 and the detection position display area 553, values of “detection time” and “longitude / latitude” of the warning information data are set, respectively.

In the detour selection area 554, "Yes" and "No" buttons are displayed. Which button is highlighted is determined by the “bypass flag” of the warning information data. The “detour flag” can be set by the user. When one of the displayed “Yes” button and “No” button is selected, the “detour flag” is set according to the selection. .

The sensor sensitivity setting area 555 includes the sensor section 1
In order to prevent malfunction of the switch and the sensor of 00, the sensitivity is variably set by the user.
"Down", "Std (standard)", "Up"
(Up) button is displayed. For example, FIG.
When the user determines that the warning information shown in (1) is displayed due to malfunction of the impact sensor 105 (for example, when vibration is detected when a large truck runs sideways), " The "Down" button may be selected, and thereafter, the security device 1
When the 0 abnormality detection function is activated, the detection sensitivity of the impact sensor 105 is automatically set to a lower level.

As described above, by displaying the above-mentioned warning (caution) information, the user can know detailed information of the abnormality that has occurred in the vehicle at an arbitrary timing. In addition, since it is possible to confirm a place where an abnormality has occurred in the vehicle in the past, it is possible to travel or park around the place.

Next, the operation for displaying a warning / caution point superimposed on a map image will be described. FIG.
9 is a flowchart showing an operation procedure of the navigation device when displaying a warning / caution point superimposed on a map image.

The control unit 250 includes a map data memory 240
, The map data corresponding to the map image to be displayed is read (step 600), and it is determined whether or not the display target area includes a warning / caution point (step 601). Specifically, "longitude / latitude" of the warning information data stored in the warning information memory 270 is searched,
It is determined whether or not this “longitude / latitude” is included in the display target area.

If no warning / caution point is included in the display target area, the control unit 250 creates a map image from the read map data and
(Step 602). If a warning / caution point is included, the control unit 250
A predetermined mark image indicating the attention point is created (step 603), and the mark image is superimposed on the map image created from the read map data and displayed on the display device 30 (step 604).

FIG. 13 is a diagram showing a display example of a map image in which warning / caution points are superimposed. "A" shown in FIG.
“1” and “A2” indicate warning points, and “W1”
Indicates an attention point. By displaying the warning / caution point on the map image in this manner, the user can visually confirm the location where the abnormality has occurred in the vehicle, so that traveling or parking at that location is avoided. It becomes easier.

Next, the operation for searching for a route avoiding the warning / caution points will be described. FIG. 14 is a flowchart showing the operation procedure of the navigation device that performs a route search. When the destination is set by the user, the control unit 25
0 determines whether the destination is a warning / caution point (step 700). Specifically, the control unit 25
A value of 0 determines whether the longitude / latitude of the set destination matches the “longitude / latitude” of any of the warning information data stored in the warning information memory 270.

If the longitude / latitude of the destination matches the “longitude / latitude” of the warning information data, the control unit 250
The user is notified that the destination matches the warning point or the caution point (step 701). For example, a comment to that effect is displayed on the display device 30.

Next, the control unit 250 reads map data in a predetermined range from the departure point (for example, the current vehicle position is set as the departure point) to the destination stored in the map data memory 240 (step S1). 702), it is determined whether or not the search area corresponding to the read map data includes a warning / caution point with a “detour flag” set (step 703). Specifically, the warning information memory 27
The “detour flag” of the warning information data stored in “0” is searched, the warning information data with the flag “1” (to detour) is extracted, and the “longitude / latitude” of the extracted route information data is A search is performed to determine whether this “longitude / latitude” is included in the search area.

When the warning / caution point with the “detour flag” set is not included in the search, the control unit 250
A normal route search is performed based on the read map data (step 704). If a warning / caution point with the “detour flag” set is included in the search area, a road within a predetermined range from the warning / caution point is excluded from search targets and a route search is performed ( Step 7
05).

As described above, by performing a route search while avoiding a warning / caution point, it becomes easy to avoid running or parking in a dangerous place. Also, the “detour flag” of the warning information data can be set by the user, and whether or not to bypass each warning / caution point can be freely set by the user's selection. -Rather than avoiding attention points uniformly, a flexible detour course that reflects the user's will can be set.

In the security system according to the present embodiment, when an abnormal state of a vehicle is detected by the security device 10, security data including information on the abnormality is transmitted from the security device 10 to the navigation device 20. Since data such as the position and time of the vehicle is added to the security data and stored as warning information data, various processes can be performed thereafter using the warning information data. Specifically, the navigation device 20 provides the content of the warning information data to the user using the screen of the display device 30, and the user provides detailed information on the abnormal state of the vehicle including the location where the abnormality has occurred. Can be easily obtained. Further, when an abnormality occurs in the vehicle, the detailed information is sequentially sent to the navigation device 20 side to create the warning information data, so that the navigation device 20 detects the abnormal state of the vehicle detected by the security device 10. It can be easily reflected on the navigation operation by the navigation device 20. For example, the navigation device 20 displays a location where a vehicle abnormality has occurred based on warning information data in a map display operation, or performs a route search that bypasses a location where a vehicle abnormality has occurred in a route search process. Can be.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, when the user selects any warning point or the like from the warning / caution point list shown in FIG. 10, the detailed warning information or the like shown in FIG. 11 is displayed. When the user selects a warning point or the like displayed on the map image shown in FIG. 13, detailed warning information or the like may be displayed.

In the above-described embodiment, the warning information data is stored in the warning information memory 270. However, the navigation device 20 is provided with a card slot, and the warning information data is stored in a memory card inserted in the card slot. It may be. By storing the warning information data in the memory card, the memory card can be used by being inserted into the card slot of the navigation device 20 of another vehicle. In this case, since the warning information data can be shared by a plurality of persons, the warning information data collected by another person can be used for the security of the own vehicle.

In the above-described embodiment, a map display operation and a route search operation are considered as specific examples of a case where the detected information is reflected in a normal navigation operation when an abnormal state of the vehicle is detected. The information of abnormality detection may be reflected in other navigation operations. For example, when the vehicle approaches the location where the abnormality occurred,
That may be notified to the driver or the like by a buzzer sound or a predetermined announcement sound.

[0055]

As described above, according to the present invention, when an abnormal state caused by a factor added from outside the vehicle is detected, information on the abnormal state including the position of the own vehicle at the time of occurrence of the abnormality is provided by the navigation apparatus. Since the position is displayed on the display screen, the position where some abnormality has occurred can be easily confirmed.

According to the present invention, when an abnormal condition occurs due to a factor applied from outside the vehicle, information on the abnormal condition, information on a warning operation performed at this time, and the position of the own vehicle at the time of occurrence of the abnormal condition Since the warning history information including the information is generated, it is possible to perform a navigation operation reflecting the warning history information.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a security system according to an embodiment to which the present invention is applied.

FIG. 2 is a diagram illustrating a detailed configuration of a security device.

FIG. 3 is a diagram showing a detailed configuration of a navigation device.

FIG. 4 is a flowchart showing an operation procedure when the state of the vehicle becomes abnormal.

FIG. 5 is a diagram showing the contents of security data.

FIG. 6 is a diagram showing contents of own vehicle position data.

FIG. 7 is a flowchart showing an operation procedure of the navigation device when the power is turned on.

FIG. 8 is a diagram showing the contents of warning information data.

FIG. 9 is a flowchart illustrating an operation procedure of a navigation device that displays warning information.

FIG. 10 is a diagram illustrating an example of a display screen of a warning / caution point list.

FIG. 11 is a diagram showing an example of a display screen for warning information.

FIG. 12 is a flowchart illustrating an operation procedure of the navigation device when displaying a warning / caution point on a map image.

FIG. 13 is a diagram showing an example of a map screen on which warning / caution points are superimposed and displayed.

FIG. 14 is a flowchart illustrating an operation procedure of a navigation device that performs a route search while avoiding a warning / caution point.

[Explanation of symbols]

 Reference Signs List 10 security device 20 navigation device 30 display device 100 sensor unit 101 door switch 102 hood / trunk switch 103 ignition switch 104 radar sensor 105 impact sensor 110, 250 control unit 210 reception memory 220 own vehicle position detection unit 270 warning information memory

Claims (4)

[Claims] 1. An abnormality detecting means for detecting an abnormal state caused by a factor added from outside the vehicle, a vehicle position detecting means for detecting a position of the own vehicle, and information on the abnormal state detected by the abnormality detecting means. And a display control means for displaying the information on the display screen of the navigation device together with the vehicle position information at the time of occurrence of the abnormality detected by the vehicle position detection means. 2. An abnormality detecting means for detecting an abnormal state caused by a factor applied from outside the vehicle; a warning means for performing a predetermined warning operation when the abnormal state is detected by the abnormality detecting means; Own-vehicle-position detecting means for detecting a position; information on an abnormal state detected by the abnormality detecting means; information on the warning operation performed by the warning means; and occurrence of an abnormality detected by the own-vehicle position detecting means. Warning history information storage means for storing warning history information including the current vehicle position information, and navigation processing means for reflecting the warning information stored in the warning history information storage means in a navigation operation. A security system characterized by the following. 3. The navigation operation according to claim 2, wherein the navigation operation is a map display operation, and when the own vehicle position at the time of occurrence of the abnormality is included in a display area, the navigation operation corresponds to the own vehicle position at the time of occurrence of the abnormality. A security system wherein a predetermined index is displayed. 4. The security system according to claim 2, wherein the navigation operation is a route search operation, and a route that bypasses a position of the own vehicle when the abnormality occurs is set.