JP2005247075A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of using a sensor to be used in the navigation mode commonly in a burglary monitor mode, and performing relatively accurate burglary alarm. <P>SOLUTION: This navigation device has a sensor section 1 for detecting at least either of acceleration or angular speed of a traveling body, a first processing section 2 for outputting a navigation signal by using an output of the sensor section 1 at the time of the navigation mode, a second processing portion 3 for outputting a monitor mode signal by using the output of the sensor portion 1 at the time of the monitor mode, a parking judgment section 6 for judging if the traveling body is parked or not, and a control section 9 for outputting the navigation signal by using the output of the first processing section 2 when it is judged not being parked by the parking judgment section 6 and outputting an alarm signal by using the output of the second processing section 3 when it is judged being parked. A sensor to be used in the navigation mode is used in the monitor mode as it is, thus judging a burglary in the monitor mode. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a navigation device provided with a theft alarm device.

  In recent years, theft of vehicles has increased greatly. For this reason, various navigation devices equipped with a theft alarm device have been developed and used. For example, the position of the vehicle is periodically updated and registered using a GPS receiver or the like, and if the vehicle is stolen, the center automatically reports the position of the previously registered vehicle at that time. . And the thing of measuring and reporting the position of a vehicle regularly after that is also known (for example, refer to patent documents 1). According to this, when the vehicle is stolen, the center of the vehicle is automatically notified to the center. If the vehicle is stolen, it is immediately found out that the vehicle has been stolen and the vehicle is found. Has the merit of being very easy.

Also, when a vehicle is stolen, it is usually the case when the engine is stopped and parked, so that the tires are in spite of the engine being stopped (that is, the ignition switch is turned off). There are also known devices that determine that the vehicle has been stolen and report the vehicle position to the center when the vehicle rotates or the vehicle posture changes (for example, changes in direction). In this case, it is said that not only a GPS receiver but also a direction sensor, a distance sensor, a beacon, and the like may be used as appropriate for vehicle position detection (see, for example, Patent Document 2).
JP 2003-54369 A JP 2002-37031 A

  However, the one described in Patent Document 1 detects theft by detecting breakage of a window glass, movement of a vehicle body, starting of an engine without a key, breakage of a security device, or the like. In addition to the acceleration sensor for navigation, the angular velocity sensor, and the like, a sensor for theft is required, which leads to a problem that the cost is greatly increased.

  Moreover, in what was described in patent document 1, if a theft sensor act | operates, it will be judged as theft, and it is not judged in particular whether it is parked. Therefore, since the location of the vehicle is reported regularly when it is actually stolen, it is very convenient in that aspect, but it can be said that the accuracy is not necessarily high whether it was really stolen. There was a problem that there was no aspect, and if there was an error, it would be very annoying.

  Moreover, in what was described in patent document 2, it detects that the vehicle is parked by the ignition switch being turned off, and detects that the vehicle has been stolen due to the rotation of the tire or the change in the posture of the vehicle. However, when detecting changes in the attitude of a vehicle, it is simply stated that a GPS receiver, direction sensor, distance sensor, beacon, etc. should be used. It is not clear what to use. Therefore, in this case as well, there is a problem that malfunction is not avoided and sometimes very annoying.

  The present invention has been made in view of such conventional problems, and it is an object of the present invention to provide a navigation device that does not require a special sensor or the like and is capable of a burglar alarm accurately at a relatively low cost. is there.

  A navigation device according to the present invention includes a sensor unit that detects at least one of acceleration or angular velocity of a moving body, a first processing unit that outputs a navigation signal using an output of the sensor unit during navigation mode, and a sensor unit during monitoring mode. A second processing unit that outputs a monitoring mode signal using the output of the first, a parking determination unit that determines whether or not the moving body is parked, and a first processing unit that determines that the parking determination unit is not parked And a control unit that outputs a warning signal using the output of the second processing unit when it is determined that the vehicle is parked.

  With this configuration, the theft is determined by using the sensor used in the navigation mode also in the monitoring mode, and there is an effect that a separate sensor for theft is not required.

  In the navigation device of the present invention, in the monitoring mode, the second processing unit, in the monitoring mode, integrates the output of the sensor unit at predetermined time intervals, the integration value integrated by the integration unit, and the previous pre- A comparison means for comparing the integration value for a predetermined time period, and when the output of the comparison means is greater than a predetermined threshold value, it is determined that there is an abnormality and a predetermined monitoring mode signal for driving the alarm unit is controlled Output to the unit.

  With this configuration, the output of the sensor unit at a predetermined time interval is monitored, and there is an effect that a theft can be accurately alarmed without being confused by the instantaneous sensor output.

  In the navigation device of the present invention, in the monitoring mode, the second processing unit is configured to differentiate the output of the sensor unit and to determine whether the output of the differentiating unit is greater than a predetermined first threshold value. And means for integrating the output of the sensor unit for a predetermined period of time from the time when the output of the differentiating means is determined to be greater than a predetermined first threshold, and the integrated value of the integrating means Is compared with an integral value before the time point, and when the output of the comparison means is greater than a predetermined second threshold value, it is determined that there is an abnormality and a predetermined monitoring mode signal is output.

  With this configuration, when the sensor output changes momentarily, integration of the sensor output is started and compared with the previous integration value. As a result, the sensor output starts integration. At any time, whatever the value is, the theft can be detected with high accuracy by the output of the comparison means.

  Moreover, the navigation apparatus of this invention has the structure by which a parking determination part determines whether it is parked by ON / OFF of an ignition switch.

  With this configuration, it is determined that the vehicle is parked when the ignition switch is off, and it is determined whether or not the vehicle has been stolen in that state, so that it is possible to more accurately determine whether or not the vehicle has been stolen.

  The navigation device of the present invention further includes a positioning satellite signal receiving unit, and the parking determination unit changes the current position for a predetermined time based on the positioning satellite signal reception data received by the positioning satellite signal receiving unit. If not, it is determined that the vehicle is parked.

  With this configuration, it is determined that the vehicle is parked when the current position does not change for a predetermined time, and it is possible to more accurately determine whether the vehicle is parked.

  In the navigation device of the present invention, the parking determination unit determines that the vehicle is parked when the output of the sensor unit does not change for a predetermined time.

  With this configuration, when the output of the sensor unit does not change for a predetermined time, it is determined that the vehicle is parked, and it is more accurately determined whether the vehicle is parked.

  The navigation device of the present invention further includes an internal battery, and has a configuration in which the internal battery is used in the monitoring mode.

  With this configuration, when power is supplied from the vehicle battery in the navigation mode, consumption of the vehicle battery can be suppressed by using the internal battery in the monitoring mode, and power supply from the vehicle battery can be suppressed. Even if it is cut off, it is possible to operate with an internal battery, so that a more reliable operation can be expected.

  In the navigation device of the present invention, the first processing unit does not operate in the monitoring mode.

  With this configuration, unnecessary power consumption in the monitoring mode can be reduced, and the life of the internal battery can be prolonged.

  The navigation device of the present invention includes a sensor unit that detects at least one of acceleration or angular velocity of a moving body, a first processing unit that outputs a navigation signal using an output of the sensor unit in a navigation mode, and the monitoring unit in the monitoring mode. When it is determined that the second processing unit that outputs the monitoring mode signal using the output of the sensor unit, the parking determination unit that determines whether the moving body is parked, and the parking determination unit that is not parked, A control unit that outputs a navigation signal using the output of the first processing unit and outputs an alarm signal using the output of the second processing unit when it is determined that the vehicle is parked; The sensor used in the navigation mode can be used in the monitoring mode as it is, and can be used to determine theft in the monitoring mode. It has the effect that it does not require a capacitor.

  Hereinafter, a navigation device according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of the navigation device according to the first embodiment of the present invention.

  As shown in FIG. 1, the navigation device according to the first embodiment of the present invention inputs a sensor unit 1 including one or both of an acceleration sensor and an angular velocity sensor, and an output of the sensor unit 1. And the arithmetic processing unit 4 including the first processing unit 2 and the second processing unit 3, and the GPS receiving unit that receives the output of the arithmetic processing unit 2 and radio waves from the GPS satellite that is a positioning satellite and measures the current position. 5 and an output of a parking determination unit 6 to be described later are input, respectively, a control unit 9 for controlling the navigation display unit 7 and the warning unit 8 respectively, and an ignition for generating a parking determination signal to the parking determination unit 6 The switch 10 and the power supply part 13 each provided with the internal battery 11 and the vehicle battery 12 are provided.

  In the arithmetic processing unit 4, the first processing unit 2 is a processing unit that operates in the navigation mode, and the second processing unit 3 is a processing unit that operates in the theft monitoring mode.

  When the ignition switch 10 is turned on, the parking determination unit 6 determines that the vehicle is not parked, and the calculation processing unit 4 is controlled so that the first processing unit 2 operates based on the output. And the power supply part 13 is controlled so that the vehicle battery 12 will be in an operation state, and a power supply will be supplied from the vehicle battery 12 to each part. The control unit 9 receives the output of the parking determination unit 6 and operates in the navigation mode. That is, in the navigation mode, the position information (position information such as latitude, longitude, altitude, and traveling direction) of the current position measured by the GPS receiver 5 is the position information (position information of the current position processed by the first processing unit 2 ( That is, it is compared with position information calculated based on the output of an acceleration sensor, an angular velocity sensor, or the like constituting the sensor unit 1, and the control unit 9 corrects each other's error. A more accurate current position is calculated and displayed on the navigation display unit 7 together with the map information.

  When the ignition switch 10 is off, the parking determination unit 6 determines that the vehicle is parked. When the parking determination unit 6 determines that the vehicle is parked, the output is controlled so that the second processing unit 3 operates in the arithmetic processing unit 4. In the power supply unit 13, the vehicle battery 12 is in an inoperative state and the internal battery 11 is in an operating state. The internal battery 11 is configured not to particularly supply power to the navigation control part for operating the first processing unit 2 and the navigation function, but to supply power only to other necessary parts. In this state, a so-called theft monitoring mode is set, and the theft is monitored by the operation of the second processing unit 3.

  Next, the operation of the navigation device according to the present embodiment including the operation in the theft monitoring mode will be described in detail with reference to FIGS.

  FIG. 2 is a flowchart illustrating the operation of the navigation device according to the present embodiment, and FIG. 3 is a diagram illustrating an example of the output of the sensor unit 1.

  In the present embodiment, the parking determination unit 6 constantly monitors the on / off state of the ignition switch 10, and determines whether or not the vehicle is parked based on the result (S201). As a result of the determination, when it is determined that the vehicle is not parked (N in S201), as described above, the whole operates in the navigation mode (S202), and the navigation display unit 7 is corrected more accurately. The current position is displayed along with the map information.

  When the ignition switch 10 is off and the parking determination unit 6 determines that the vehicle is parked, as described above, in the arithmetic processing unit 4, the first processing unit 2 is in a non-operating state. The second processing unit 3 is in an operating state. Then, the control unit 9 is switched from the navigation mode to the theft monitoring mode, and the power supply unit 13 is switched from the vehicle battery 12 to the internal battery 11 (S203).

  In the arithmetic processing unit 4, when the first processing unit 2 is in a non-operating state and the second processing unit 3 is in an operating state, the output a (t) of the sensor unit 1 is predetermined in the second processing unit 3. Integration is performed for each predetermined time T (S204). Then, the integrated value Sn is compared with the previous integrated value Sn-1 for a predetermined time, and the absolute value Cn of the difference is calculated (S205). The calculated absolute value Cn is compared with a predetermined threshold value D, and it is determined whether or not it is greater than the threshold value D (S206).

If the calculated absolute value Cn is not larger than the predetermined threshold value D (N in S206), the integrated value of the output in the sensor unit 1 for the next fixed time T is subsequently obtained (S204). Become. When the calculated absolute value Cn is larger than the predetermined threshold D (Y in S206), the output within the predetermined time T detected by the sensor unit 1 is said to be larger than a predetermined specified value. Here, it is determined that the theft is theft, and a predetermined monitoring mode signal is sent to the control unit 9.
Output to. The control unit 9 receives the monitoring mode signal and drives the alarm unit 8 in a predetermined state (S207).

  The alarm unit 8 may emit a loud alarm sound to the outside or emit a bright alarm light to the outside, but further, together with the vehicle ID, the current position of the vehicle, etc. A wireless transmission unit may be provided for automatically notifying the center device that the theft has occurred, or automatically notifying the vehicle owner (for example, a mobile phone owned by the owner). . In this way, when it is stolen, it can be immediately known by the center device and the owner of the vehicle, and the current position of the vehicle can be known from moment to moment, so that the stolen vehicle can be searched quickly. Has the effect of being able to.

(Second Embodiment)
By the way, in 1st Embodiment, the output of the sensor part 1 is each integrated for every predetermined fixed time T, they are mutually compared before and after, respectively, and whether the difference is larger than the predetermined threshold value D is determined. It is determined that the vehicle has moved when it is large and it is determined that the vehicle has been stolen. In this case, as shown in FIG. 4, it happens to count a predetermined time T. Even if a signal larger than that of the sensor unit 1 has already been output at the time of separation, the difference between the front and rear is zero if signals of the same magnitude are output before and after that time. Regardless, there may be a problem that a large signal is actually output from the sensor unit 1 and it is stolen.

  The navigation according to the second embodiment of the present invention is a better navigation device that does not cause such a malfunction.

  Hereinafter, a navigation device according to a second embodiment of the present invention will be described in detail with reference to the drawings.

  The navigation device according to the second embodiment of the present invention also has substantially the same configuration as the navigation device according to the first embodiment shown in FIG. However, in the navigation device in the second embodiment, the arithmetic processing unit 4 and the control unit 9 operate as follows.

  FIG. 5 is a flowchart showing the operation of the navigation device according to the second embodiment of the present invention.

  In the present embodiment, the parking determination unit 6 constantly monitors the on / off state of the ignition switch 10 as in the navigation device in the first embodiment, and determines whether the vehicle is parked based on the result. (S501). As a result of the determination, when it is determined that the vehicle is not parked (N in S501), the entire device operates in the navigation mode (S502), like the navigation device in the first embodiment, and the navigation display unit 7 The more accurate current position corrected in (5) is displayed together with the map information.

  When the ignition switch 10 is off and the parking determination unit 6 determines that the vehicle is parked (Y in S501), the arithmetic processing unit 4 performs the first operation similar to the navigation device in the first embodiment. The first processing unit 2 becomes inactive and the second processing unit 3 becomes active. Then, the control unit 9 is switched from the navigation mode to the theft monitoring mode, and the power supply unit 13 is switched from the vehicle battery 12 to the internal battery 11 (S503).

In the arithmetic processing unit 4, when the first processing unit 2 is in an inoperative state and the second processing unit 3 is in an operating state, the output a (t) of the sensor unit 1 is differentiated in the second processing unit 3. . That is,
A change in the output a (t) of the sensor unit 1 is divided by a minute unit time Δt, and an output change {a (t) −a (t−Δt)} / Δt at that moment is detected (S504). Then, the differentiated value da / dt is compared with a predetermined first threshold value D1, and it is determined whether or not it is larger than the first threshold value D1 (S505).

  As a result of the determination, when the differentiated value da / dt is not larger than the predetermined first threshold value D1 (N in S505), the output a (t) of the sensor unit 1 is sequentially arranged as it is in the array U (that is, a predetermined value). (S506), and then returns to the state of differentiating the next output of the sensor unit 1 (S504).

  When the differentiated value da / dt is larger than the predetermined first threshold value D1 (Y in S505), it means that the output of the sensor unit 1 instantaneously has a change larger than the predetermined value. In this case, the output of the sensor unit 1 is sequentially integrated from the time tn to a predetermined time T, that is, from time tn to time tn + 1 (S507). Then, subsequently, the output a (t) of the sensor unit 1 stored in the array U is integrated (S508).

  Here, in the array U, only the output of the sensor unit 1 for a predetermined time T can be stored. That is, when the outputs a (t) of the sensor unit 1 are stored one after another, the outputs a (t) of the old sensor unit 1 are excluded one after another, and as a result, the array U is always in the immediately preceding state. The output a (t) of the sensor unit 1 for a certain time T, that is, the certain time T from time tn−1 to tn is stored as it is.

  In this way, the output of the sensor unit 1 from time tn to time tn + 1 is integrated (S507), and the output of the sensor unit 1 from time tn-1 to time tn is integrated (S508), both Sn , Sn-1 are compared, and the absolute value Cn of the difference is calculated (S509). The calculated absolute value Cn is compared with a predetermined second threshold value D2, and it is determined whether or not it is greater than the second threshold value D2 (S510).

  If the calculated absolute value Cn is not larger than the predetermined second threshold D2 (N in S510), the contents stored in the array U are initialized (S511), and then the next sensor unit The process returns to the state of differentiating the output of 1 (S505). When the calculated absolute value Cn is larger than the predetermined second threshold D (Y in S510), the output for a certain time T (a certain time from tn to tn + 1) detected by the sensor unit 1 is preliminarily output. The second processing unit 3 determines that the theft is theft and outputs a predetermined monitoring mode signal to the control unit 9. The control unit 9 receives the predetermined value from the second processing unit 3. In response to the monitoring mode signal, the alarm unit 8 is driven in a predetermined state (S512).

  The alarm unit 8 may be any unit that emits a loud alarm sound to the outside or emits bright alarm light to the outside, as in the navigation device in the first embodiment. In addition, the center device is automatically notified of the vehicle ID, the current position of the vehicle, and the like when the vehicle is stolen, or automatically transmitted to the owner of the vehicle (for example, a mobile phone owned by the owner). You may provide the wireless transmission part for alerting | reporting. In this way, when it is stolen, it can be immediately known by the center device and the owner of the vehicle, and the current position of the vehicle can be known from moment to moment, so that the stolen vehicle can be searched quickly. Has the effect of being able to.

As described above, according to the present embodiment, the output of the sensor unit 1 is not simply integrated at predetermined time intervals and compared with each other to determine theft, but the output of the sensor unit 1 is differentiated in advance. However, only when the value is larger than a predetermined first threshold value, the output of the sensor unit 1 is integrated for a certain time T from that time, and compared with the integrated value for a certain time T before that. Therefore, as a result, it is almost impossible that the output of the sensor unit 1 has already increased at the start of the predetermined time T as shown in FIG. 4, and as shown in FIG. Compared with a normal case with high accuracy, the theft can be detected with high accuracy.

  In addition, according to the present embodiment, when the output of the sensor unit 1 changes greatly, the outputs of the sensor unit 1 for a certain period thereafter and the certain period before that are integrated, and the integration values are compared. Therefore, even if the parking position is a slope or tilted position, or even if the surrounding temperature is high and a large signal is output to the sensor unit 1 in advance, regardless of these The detection of the theft is started when the output of the sensor unit 1 changes greatly, and the theft can be detected with high accuracy.

  In any of the above-described embodiments, the parking determination unit 1 determines whether the ignition switch 10 is turned on or off, but the current position is determined using the output of the GPS receiving unit 5. If the latitude / longitude of the vehicle has not changed for a certain time (for example, 10 minutes) or more, it may be determined that the vehicle is parked. Further, using the output of the sensor unit 1, if the output has not changed for a certain time (for example, 10 minutes) or more, it may be determined that the vehicle is parked. Even when it is determined whether or not the vehicle is parked with the ignition switch 10 turned on or off, if the vehicle is not turned off for a predetermined time (for example, 1 minute or 5 minutes), the vehicle is not judged to be parked. It is better to do it. This is because if it is determined that the vehicle is parked at the moment when the ignition switch 10 is turned off, a signal larger than the sensor unit 10 is output even if the vehicle vibrates greatly when the passenger gets off the vehicle, and theft This is because there is a possibility of malfunction.

  In the above embodiment, GPS is used as a positioning satellite, but it goes without saying that other means are also used.

  The navigation device of the present invention includes a sensor unit that detects at least one of vehicle acceleration and angular velocity, a first processing unit that outputs a navigation signal using an output of the sensor unit in a navigation mode, and the monitoring unit in the monitoring mode. When it is determined by the second processing unit that outputs the monitoring mode signal using the output of the sensor, the parking determination unit that determines whether or not the vehicle is stopped, and the parking determination unit that the vehicle is not parked, the first Control that outputs a navigation signal using the output of the processing unit and outputs an alarm signal for driving the alarm unit using the output of the second processing unit when it is determined that the vehicle is parked The sensor used in the navigation mode can be used in the monitoring mode as it is, and can be used to determine theft in the monitoring mode. Without requiring a sensor for theft, useful as this kind of navigation system.

The block diagram which shows schematic structure of the navigation apparatus in the 1st, 2nd embodiment of this invention. The flowchart which shows operation | movement of the navigation apparatus in the 1st Embodiment of this invention. The figure which shows an example of the output of the sensor part of the navigation apparatus in the 1st Embodiment of this invention. The figure which shows the other example of the output of a sensor part in the navigation apparatus in the 1st Embodiment of this invention. The flowchart which shows operation | movement of the navigation apparatus in the 2nd Embodiment of this invention. The figure which shows an example of the output of the sensor part of the navigation apparatus in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sensor part 2 1st process part 3 2nd process part 4 Arithmetic process part 5 GPS receiving part 6 Parking determination part 7 Navigation display part 8 Alarm part 9 Control part 10 Ignition switch 11 Internal battery 12 Vehicle battery 13 Power supply part

Claims (8)

A sensor unit that detects at least one of acceleration or angular velocity of the moving body, a first processing unit that outputs a navigation signal using the output of the sensor unit in the navigation mode, and an output of the sensor unit in the monitoring mode. A second processing unit that outputs a monitoring mode signal, a parking determination unit that determines whether the moving object is parked, and an output of the first processing unit when the parking determination unit determines that the vehicle is not parked. And a control unit that outputs a warning signal using the output of the second processing unit when it is determined that the vehicle is parked. In the monitoring mode, the second processing unit integrates an output of the sensor unit every predetermined time, an integration value integrated by the integration unit, and a predetermined time before the integration value. A comparison means for comparing with an integral value, and when the output of the comparison means is larger than a predetermined threshold, it is judged as abnormal and a predetermined monitoring mode signal for driving the alarm section is output to the control section. The navigation device according to claim 1. The second processing unit includes a differentiating unit for differentiating the output of the sensor unit in the monitoring mode, a determining unit for determining whether the output of the differentiating unit is greater than a predetermined first threshold, and the determination When the means determines that the output of the differentiating means is greater than a predetermined first threshold, the integrating means for integrating the output of the sensor unit for a predetermined time from that time, and the integration value of the integrating means Comparing means for comparing with an integrated value before the time point, and when the output of the comparing means is larger than a predetermined second threshold value, it is determined that there is an abnormality and the predetermined monitoring mode signal is output. The navigation device according to claim 1. The navigation device according to any one of claims 1 to 3, wherein the parking determination unit determines whether the vehicle is parked by turning an ignition switch on and off. A positioning satellite signal receiving unit is further provided, and the parking determination unit is parked when the current position does not change for a predetermined time based on the positioning satellite signal reception data received by the positioning satellite signal receiving unit. The navigation device according to claim 1, wherein the navigation device is determined as follows. The navigation device according to any one of claims 1 to 3, wherein the parking determination unit determines that the vehicle is parked when the output of the sensor unit does not change for a predetermined time. The navigation device according to any one of claims 1 to 6, further comprising an internal battery, wherein the internal battery is used in the monitoring mode. The navigation device according to claim 1, wherein the first processing unit does not operate in the monitoring mode.

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