JP4658671B2 - Vehicle security device - Google Patents

Description

  The present invention relates to a vehicular security device, and more specifically, includes a vehicle-mounted device mounted on a vehicle and a portable device carried by a user, and a bidirectional operation for security operation between them. The present invention relates to an improvement of a control method in communication.

  There are various types of vehicular security devices. One type of vehicular security device is to install the main body (in-vehicle device) on the vehicle and to carry the portable device with the user. There is something that ensures security through communication. As this type of vehicle security device, there is, for example, Patent Document 1.

  In such a two-way communication type vehicle security device, the vehicle-mounted device has two states (operation modes): a state in which a warning operation is activated (armed: arm) and a state in which the warning operation is released (disarmed: disarm). Yes, the former is called the alert mode and the latter is called the non-alert mode. The warning mode and the non-warning mode can be switched and set by a control signal transmitted from the portable device to the in-vehicle device based on a manual operation (pressing a predetermined switch) on the portable device. This control signal includes a code indicating the control content, such as a warning mode setting command signal and a non-warning mode setting command signal, and simply sends the control signal and receives the control signal on the in-vehicle device side. Then, the current state is switched (if the current mode is a warning mode, the switch to cancel the non-warning mode is performed, and if the current mode is the non-warning mode, the switch is set to the warning mode) is there.

  The in-vehicle device is connected to a state sensor disposed in each part of the vehicle, and waits for a detection signal from the state sensor to monitor the current state of the vehicle. The vehicle-mounted device notifies the user of the abnormality by notifying the user of the abnormality of the vehicle by transmitting the fact (notification signal) to the portable device when the abnormality is detected.

  In such a conventional two-way communication type vehicle security device, normally, when the vehicle-mounted device detects an abnormality after shifting (armed) to the warning mode, an alarm is given to the portable device while threatening from the vehicle-mounted device. An error is reported. That is, before the development of such a bidirectional communication type vehicle security device, the portable device transmits the above-mentioned mode switching command to the vehicle-mounted device, and the vehicle-mounted device monitors the abnormality according to the command from the portable device. In addition, the alarm process, such as generating a loud warning sound in the event of an abnormality, threatens the intruder, and the warning sound causes the surrounding person (the owner of the car at home to be in the parking lot at home). Etc.). However, a car parking lot is not necessarily provided in the home, and the parking position of the vehicle on which the in-vehicle device is mounted, such as a user who rents a parking lot away from the home, or parks on the go In addition, there is a situation in which the driver (user) who has the portable device is away, and the user cannot hear the alarm sound that the in-vehicle device emits for intimidation. On the other hand, in the case of a two-way communication type vehicle security device, an abnormality notification is sent from the in-vehicle device that has detected the abnormality to the portable device. The user with the machine can also know the abnormality. And in the two-way communication type vehicle security device, the functions such as the generation of the alarm sound are left as they are because of the threat in the conventional one-way vehicle security device, and the in-vehicle device detects an abnormality as described above. In such a case, an alarm sound is generated on the spot and an abnormality is notified to the portable device.

  A user (portable device) that is located at a position away from the vehicle is configured to check each other by transmitting and receiving an ID (Identification), that is, an ID signal for individual identification, between the in-vehicle device and the portable device. Because of the necessity of notifying an abnormal signal, a specific low-power radio standard that takes a relatively wide communication range may be adopted.

  As described above, in addition to the user's manual operation on the portable device, the vehicle-mounted device detects a change in state and automatically performs mode switching in the vehicle-mounted device. For example, the in-vehicle device monitors the electric field strength of the ID signal (communication signal) sent by the portable device, and when the electric field strength is less than a predetermined value, it is determined that the portable device (user) is separated from the vehicle by more than a predetermined value, and the door is locked. And go into alert mode. On the other hand, if the electric field strength of the corresponding ID signal (communication signal) is greater than or equal to a predetermined value, it is determined that the portable device (user) is in the vicinity of the vehicle, the door is unlocked, and the operation in the non-warning mode is entered. Of course, the warning mode and the non-warning mode may be switched based on the electric field strength separately from the unlocking / locking of the door. In order to automatically switch the mode in this way while using the specific low power radio, the ID signal is periodically transmitted with a predetermined pause time for the specific low power radio standard. Will be repeated.

In addition, the control method for automating the switching between the warning mode and the non-warning mode controls the state of the ignition key in addition to the configuration that switches according to the electric field strength of the ID signal (communication signal) from the portable device as described above. There is an idea to use for judgment. In other words, a key position sensor that detects the position of the ignition key is connected to the in-vehicle device as a state sensor, and the operation of pulling out the ignition key or turning the ignition key ACC-OFF is monitored. If there is, control for switching to the warning mode is performed after a predetermined time has elapsed. In other words, since the above operation is usually performed before the driver gets off the vehicle, it can be estimated that the driver gets off the vehicle and leaves the vehicle after a certain time has elapsed from the operation. It is. Therefore, it shifts to the alert mode with a certain margin.
JP 2001-88661 A

  However, such conventional vehicle security devices have the following problems. When two-way communication is performed while automatically performing the mode switching as described above, the ID signal repeats its transmission regularly (periodically) with a pause time, so that power consumption is large. There is a problem. Since the other party constantly waits for reception of the incoming ID signal, the power consumption also increases. In addition, the portable device side constantly waits for a notification signal indicating abnormality detection notified by the in-vehicle device, and in any case, a long-term steady reception standby is a heavy burden on the battery. In particular, there is a great demand for light weight and downsizing of portable devices, and there is a restriction that the capacity cannot be increased unnecessarily, which is a serious problem.

  In addition, the ID signal for individual identification is appropriately encrypted. However, if the ID signal is continuously transmitted, it is easy for a suspicious person to intercept and the possibility of being disguised increases. . In addition, since the frequencies used by mobile devices are usually the same, when multiple mobile devices that support systems that automatically switch modes are used on the same site, each mobile device Since transmission is performed regularly, it may interfere and malfunction, or reception may not be possible.

  Also, it is cumbersome to perform both “door locking and unlocking” and “security device arm and disarm” when getting off and getting on the vehicle, and it is convenient to automatically arm and disarm. It is.

A common method is to link the security device arm and disarm with the door lock and unlock . However, the drawback in this case is that the security device is generally attached later, so even if it is locked or unlocked with the car key attached to the car or the remote control of the genuine keyless entry system, the security on the back It cannot be interlocked with the device and cannot be armed or disarmed. That is, when the security device is activated, the car key attached to the car or the genuine keyless remote control cannot be used. The security device also needs a circuit for controlling the lock and unlock. Installation to the car also takes time and effort for wiring.

  Conventionally, as a method of automatically performing only the arm, a method of turning off the ignition key and causing it to arm after a certain time has been performed. However, there were almost no disarms other than the above-described automatic system that constantly transmits.

  In Patent Document 1 described above, a configuration in which an ID signal is regularly transmitted from a portable device is not employed, but an unlock signal for door opening / closing control is automatically transmitted regularly. There are examples, and even in such a configuration, there arises a problem that power consumption becomes large.

  Therefore, in view of power consumption, it is preferable to adopt a configuration in which the ID signal (communication signal) is not constantly transmitted and received. In that case, since the configuration for monitoring the electric field strength of the ID signal (communication signal) cannot be determined for the control of the automatic switching between the warning mode and the non-warning mode, the other method described above, that is, the configuration for monitoring the state of the ignition key Will be taken.

  However, the automatic switching of the operation mode according to the state of the ignition key has a problem of causing an excessive alarm operation or an erroneous alarm operation. For example, if the user starts loading and unloading the luggage with the ignition key set to ACC-OFF, the system switches to the warning mode after a predetermined time has elapsed after the ignition key is set to ACC-OFF, so that the door is open. It is determined that the user is a suspicious person and a predetermined alarm operation is activated.

  Recently, sensor means that can detect the movement (moving body) of an object, such as a Doppler sensor, is provided as a state sensor, so that all moving bodies in the vicinity of the vehicle can be detected. For this reason, if the user is standing in the vicinity of the vehicle, the behavior of the user will be detected after the in-vehicle device has switched to the alert mode, and an abnormality will be detected on the in-vehicle device side. It is determined that there is a certain alarm operation such as sounding an alarm with a loud sound.

  In any case, when the user (portable device) is in the vicinity of the vehicle, even if any abnormality is detected on the in-vehicle device side, the user in the vicinity of the vehicle can immediately take action. There is no need for an acoustic warning sound, and there is a demand to stop excessive warning operation because it is annoying in the vicinity. However, simply switching to the non-warning mode only when the user (portable device) is in the vicinity of the vehicle is not preferable because it may cause an unexpected situation that is not anticipated in the design. I don't want to.

  Further, for example, when the place where the vehicle is parked faces a relatively busy road, a state sensor (Doppler sensor) is detected on the in-vehicle device side whenever a vehicle, a person, an animal, or the like passes through the road. ) Is detected, and this is notified as an abnormality detection. Such an excessive alarm operation causes a problem that the neighborhood is inconvenienced at night, for example.

  The present invention solves the above-mentioned problems, and its purpose is to reduce power consumption and to stop excessive alarm operations and erroneous alarm operations in a situation where the user (portable device) is in the vicinity of the vehicle. However, it is an object of the present invention to provide a vehicular security device that does not stop the warning mode but can maintain the original warning operation.

  Furthermore, it is difficult for a suspicious person to intercept a signal transmitted and received between a portable device and an in-vehicle device for controlling an ID signal, etc., and even if multiple portable devices are used in the same site, there is a risk of interference. An object of the present invention is to provide a vehicular security device that can suppress as much as possible.

In order to achieve the above-described object, a vehicle security device according to the present invention includes an in-vehicle device mounted on a vehicle and a portable device carried by a user, a transmitter, a receiver, and a control unit that controls operations of each unit. A vehicle security device that performs two-way communication for security operation between the in-vehicle device and the portable device, wherein the control unit of the in-vehicle device is provided in each part of the vehicle. It waits for a detection signal from a state sensor that performs detection, monitors the current state of the vehicle, determines whether the vehicle is in an abnormal state, and sets an alarm level for abnormality detection to the portable device when an abnormality is detected. has a function of transmitting a broadcast signal including the electric field intensity measuring unit provided in the portable device, the control means of the portable unit analyzes the broadcast signal received, the alarm level alarm low level Sends said response signal to respond to the broadcast signal, and a function of performing control which does not transmit a response signal when said alarm level is not low warning, alarm if the alarm level is not at least low-level alarm notification when showing And a function of transmitting the information of the electric field strength measured by the electric field strength measuring means provided in the portable device, and the control means of the in-vehicle device receives the information from the portable device after transmitting the notification signal. When a response signal is awaited and the response signal is not received during the set response signal waiting time, or when the response signal is received, the field strength measuring means provided in the portable device measures the field strength information. If when the field strength does not exceed a predetermined value, performs a normal alarm operation due to the abnormal state, there is reception of the response signal, that the electric field strength exceeds a predetermined value And to perform control that does not perform the normal alarm operation. Further, the control unit of the portable device may perform alarm notification when the response signal is transmitted . The alarm means for issuing an alarm by the alarm operation may be mounted on the vehicle-mounted device, or may be incorporated as an existing device in the vehicle such as a small lamp or horn of the vehicle.

  When such a configuration is adopted, when the in-vehicle device detects an abnormality, a notification code about the abnormality detection is sent to the portable device, and the portable device that has received the notification code performs a predetermined alarm action that the notification code should take measures against. When the notification is necessary, a response code is returned to the vehicle-mounted device, and the vehicle-mounted device that receives the response code determines the alarm operation in the vehicle and activates it.

  The notification code that requires a predetermined alarm action may include an abnormal state in the in-vehicle device, for example, an extremely serious abnormality in terms of security, or an abnormality that may cause a malfunction, and is detected by any state sensor. It may be in a high state. Further, an abnormal state may be set for each state sensor and the result may be sent.

  The portable device may return a response code for any of these notification codes, but may return a response code only for detection of a slight abnormal state or abnormality of a specific state sensor.

  Also, a request code for requesting a reply can be added to the communication signal sent from the in-vehicle device together with the notification code. In this way, the portable device returns a response code only when there is a request code, and it is not necessary to always transmit a response code, so that a power saving effect can be expected.

  For example, when the notification code is a notification of behavior determination by the Doppler sensor, there is a high probability that it is an influence of the user or the related person, and an unnecessary or annoying alarm can be avoided by returning a response code. Even when the abnormality detection is caused by a slight vibration, there are many influences from the outside, and it is not an urgent situation as security, so the same operation may be performed. Conversely, if there is a door open, current sensor, or Doppler sensor boarding detection, even if the user is nearby, an urgent warning is required and a warning with a high level of warning without waiting for a response code from the portable device You may comprise so that it may perform.

  That is, in the present invention, when the in-vehicle device detects an abnormality, the portable device is notified of the abnormality, and when the portable device receives the notification code, the response code is immediately transmitted, and the in-vehicle device notifies the portable device of the abnormality. In response to a response code from the portable device within a predetermined time, an alarm from the in-vehicle device will not be given as the presence of the portable device (user) near the vehicle (not alarmed), or the alarm level Perform low alarm (preliminary alarm). When no response code is received, a predetermined alarm (normal alarm) corresponding to the abnormal state is given.

  In this way, the in-vehicle device may transmit the notification code to the portable device when the abnormality is detected, and operate the receiver for a predetermined time. The portable device does not need to constantly transmit the ID code, and only needs to transmit the response code for a predetermined time after receiving the notification code from the in-vehicle device.

  Although it seems that the portable device needs to constantly wait for reception of the notification code transmitted by the in-vehicle device, the reception of the notification code is performed by periodically waiting for reception over a predetermined long off period. Can be done.

  In the in-vehicle device, it is only necessary to issue an abnormality alarm only when an abnormality is detected, so that it is possible to reduce the influence on power saving due to continuous transmission to some extent. The portable device can set an interval for periodic reception of reception waiting to an extent commensurate with continuous transmission for a predetermined time performed by the in-vehicle device, so that the ratio of the periodic operation of the receiver can be increased.

  For example, the communication signal transmitted by the vehicle-mounted device is configured such that one frame is 100 ms, and that one frame includes transmission data such as an ID code, a notification code related to abnormality detection, and notification information. This means that the transmission time is 1 s when 10 frames are continuously transmitted. On the other hand, the portable device only needs to perform an operation of waiting for reception periodically. For example, the portable device can be set to wait for 200 ms with an 800 ms off period interposed, and at least 1 during the 200 ms reception waiting period. The frame can receive the broadcast code. In this case, the ratio of the periodic reception standby of the portable device becomes ¼, that is, the operation period of reception standby can be set from the relationship between the frame frequency and the number of continuous transmission frames, and the pause increases as the number of continuous transmission frames increases. The ratio of time can be increased.

  Further, if the transmission output is increased, it is not necessary to increase the reception sensitivity of the portable device, so that the power consumption of the circuit can be reduced. In addition, by using the notification code transmitted from the in-vehicle device as a trigger for the control activation in the portable device, it is possible to save power, suppress unnecessary alarms, and notify the in-vehicle device in situations where abnormality notification is necessary. The two interests are the same, and it is possible to ensure suppression of unnecessary alarms while saving battery.

  Further, one of the state sensors can be a Doppler sensor that detects a displacement due to a Doppler effect of a reflected wave from an object. If this is done, it will be a problem when the user is in the vicinity of the vehicle. In this case, detection of a moving object by a Doppler sensor is the most suitable determination material. The Doppler sensor functions effectively as a state sensor, and functions sufficiently even if the sensor is used alone without providing another state sensor.

  Or it can be set as the impact sensor which detects a vibration using the displacement of an electrostatic capacitance, the eddy current effect of a coil, the piezoelectric effect of a piezoelectric material, etc. The situation where the user is in the vicinity of the vehicle includes, for example, car washing. In that case, if the vehicle-mounted device is in the alert mode, an alarm is generated by vibration caused by the car wash. For example, when parked along a road, there is a high possibility of malfunction due to vibration caused by passing a truck or the like.

  In the detection by the Doppler sensor, a warning with a relatively low warning level may be given to warn a suspicious person who wants to mischief the vehicle before touching the vehicle. However, in the detection by the impact sensor, since there is a possibility that a suspicious person or the like is directly touching the vehicle, it is necessary to issue an alarm with a relatively high warning level. Therefore, in the case described above, there is a problem in that the neighborhood is inconvenienced.

  After confirming that there is a portable device (user) in the vicinity of the vehicle, if you can control the alarm if you are nearby, these problems can be solved. Use a security system that does not have a Doppler sensor. In this case, the effect can be sufficiently exerted.

  The communication signal (frame) transmitted from the in-vehicle device to the mobile device is not only a notification code at the time of abnormality, but also a command code for instructing the alarm mode, non-alarm mode, door opening / closing, etc. There is a response code for an inquiry code such as a history reference. Even in these signal waiting states, when a notification code is sent from the in-vehicle device, the portable device immediately issues a response code. Thereby, suppression of an alarm can be performed exactly. This is preferable because the portable device is present in the vicinity of the vehicle, so that no alarm is issued and noisy.

Also, one of the state sensor, a key position sensor for detecting the state of the ignition key, in the vehicle device performs control to cancel the warning戒動work is in showing the detected use position by the key position sensors Make the configuration.

  In such a configuration, there is no problem even if the alarm by the in-vehicle device is not completely performed when the portable device is in the immediate vicinity of the vehicle. In such a case, the user may forget that the security device is in the alert mode, and set the key position to ACC or IG in order to drive the vehicle without changing to the non-alert mode. In such a case, since it is not necessary to keep the security device in the alert mode, it is preferable to set the non-alert mode. On the other hand, when the portable device is not in the immediate vicinity and this situation occurs, the suspicious person operates the key cylinder of the vehicle when the portable device is in the house (in the vicinity) such as at night in the parking lot at home. It is possible to detect the worst state of being present and issue an alarm.

  In either case, the transmission output in the in-vehicle device may be set to a value larger than the transmission output of the response signal in the portable device. That is, in such a configuration, it is desirable to transmit the alarm code for the abnormal state of the vehicle transmitted by the portable device at a high output so that the portable device can reach even when the portable device is far away. On the other hand, various codes such as response codes and command codes are also to be transmitted at a high output from the viewpoint of obtaining a wide communication range. However, it is only necessary to determine whether or not the portable device is in the vicinity of the vehicle as long as the response code is returned for the purpose of power saving, which is an object of the invention. Therefore, if the transmission output of the portable device is reduced, the case where the in-vehicle device cannot receive the response code can be determined that the portable device is located far away, and it can be determined whether the portable device is in the vicinity of the in-vehicle device. . In this case, it is not necessary to measure the electric field strength of the response code from the portable device in the in-vehicle device, the electric field strength measuring unit is not required, and the configuration of the in-vehicle device can be simplified.

  Further, a warning action command for the warning means is determined according to the electric field strength measured by the electric field strength measuring means, and determines that the portable device is in the vicinity of the vehicle when the electric field strength is greater than or equal to a predetermined level. It may be configured to perform control to activate an alarm operation with a low level.

  In such a configuration, there is no need to issue an alarm when the user who owns the portable device is in the immediate vicinity of the vehicle. On the other hand, when there is a parking lot at home and the mobile device is in the home or when going to a convenience store or the like for shopping, the vehicle is not close to the user and the user cannot be confirmed from the suspicious person. In such a case, it is preferable to issue a warning to a suspicious person. However, in the present invention, the alarm is transmitted to the portable device, so that the user can immediately check the vehicle status. Therefore, the warning by the in-vehicle device only needs to warn the suspicious person for a short period until the user confirms the abnormality.

  On the other hand, if the portable device is not present near the vehicle, the user cannot confirm the abnormality, so that a normal alarm may be issued. When the portable device is provided with the electric field strength measuring means, this can be realized by notifying the vehicle-mounted device together with the response code from the portable device together with the result of the judgment strength determining means.

  In addition, it is possible to divide the distance between the portable device and the vehicle-mounted device into three stages, the latest, the vicinity, and the outside of the service area, and to perform various combinations in consideration of the alarm standard and distance of the vehicle-mounted device. For example, most recently, a Doppler sensor is detected and no alarm is issued, an impact sensor is detected and no alarm is issued, and a door open sensor is detected and no alarm is issued. In the vicinity, a Doppler sensor is detected and no alarm is set, an impact sensor is detected and an alarm is not set, and a door open sensor is detected and a normal alarm is set. Outside of the service area, a Doppler sensor is detected as a preliminary alarm, an impact sensor is detected as a normal alarm, and a door open sensor is detected as a normal alarm. An unalarmed alarm is an alarm that does not perform an alarm or emits an alarm sound, a preliminary alarm is an alarm with a low alarm level, and a normal alarm is an alarm that is set for each state sensor.

Furthermore, the control means of the vehicle-mounted device, it is preferable to the configuration in which the control to return to the initial state after a predetermined time from the transmission of the report signal has elapsed to the mobile device upon detection of an abnormality.

  In such a configuration, the operation after the alarm is once controlled can be configured such that after the alarm is controlled for a predetermined time, the operation is reset to return to the start of the initial state. If it does in this way, if a state sensor has detected abnormality, a signal will be sent to a portable machine, and if there is a predetermined reply from a portable machine, an alarm can be controlled again.

  When the state sensor does not detect an abnormality, no alarm operation is performed, so that the vehicle security device is fixed in the warning mode. By repeating this, the alarm can be stopped when the user is in the vicinity of the vehicle, and an accurate alarm operation can be realized without the user being aware of it. In addition, since the transmitter of the portable device only needs to respond to the signal from the vehicle-mounted device, the portable device can also save power.

  As described above, in the vehicle security device according to the present invention, power consumption can be reduced, and excessive alarm operations and erroneous alarm operations are stopped in a situation where the user (portable device) is in the vicinity of the vehicle. However, the alert mode is not stopped, but the original alert operation can be maintained.

  FIG. 1 shows a preferred embodiment of the present invention. In this embodiment, the vehicular security device includes an in-vehicle device 1 that is mounted on a vehicle and a portable device 2 that is carried by the user. The in-vehicle device 1 waits for detection signals from various state sensors 11 to 16 to monitor the current state of the vehicle, transmits a notification code to the portable device 2 when an abnormality is detected, and a response code returned by the portable device 2 In addition, it is configured to determine whether there is an abnormality such as unauthorized intrusion based on detection information or the like, and to start a corresponding alarm operation such as an alarm sound or a flashing light.

  The in-vehicle device 1 and the portable device 2 perform bidirectional data communication. This data communication method is a method of transmitting and receiving various encoded data in units of frames, and performs so-called packet communication. Both the in-vehicle device 1 and the portable device 2 are given an ID code to the frame (communication signal) to be transmitted. In the code analysis of the frame, the ID code is first inspected and the frame is transmitted from the true communication partner. It is a procedure to confirm that it is a thing.

  The in-vehicle device 1 includes a control unit 3 including a so-called computer, and various state sensors 11 to 16 for detecting the state of the vehicle are connected to the input side of the control unit 3 and the transmitter 4 is connected to the output side. The sound alarm unit 5 and the light alarm unit 6 are connected. Various data to be sent to the portable device 2 are processed by the transmission routine 31 and sent to the transmitter 4, and the alarm routine 32 performs processing of an alarm command and sends it to the sound alarm unit 5 and the light alarm unit 6. The in-vehicle device 1 has a receiver 8 paired with the transmitter 4 connected to the antenna 7, and the received frame (communication signal) is sent to the control unit 3 and sent to the electric field strength measuring unit 9 to measure the electric field strength. The electric field strength value measured by the unit 9 is taken into the control unit 3.

  The portable device 2 has a receiver 22 paired with a transmitter 21 connected to the antenna 20, and includes a control unit 23, an input switch 24, and a display panel 25. The input switch 24 is a transmission routine 231 of the control unit 23. And the display panel 25 is connected to the notification processing routine 232 of the control unit 23 to receive display information, and the frame received by the receiver 22 is taken into the notification processing routine 231. The transmission routine 232 receives the analysis output (notification code) from the notification processing routine 231, generates a response code, and sends it to the transmitter 21.

(Operation of in-vehicle device 1: transmission of notification code)
The various state sensors 11 to 16 detect the state of each part of the vehicle. In this embodiment, the door open sensor 11, the Doppler sensor 12, the vibration sensor 13, the current sensor 14, the tilt sensor 15, and the key position sensor. 16 etc. are provided. When these are classified by function, there are an intrusion sensor for detecting intrusion into the vehicle, a damage sensor for detecting vehicle breakage, a behavior sensor for detecting abnormal movement of the vehicle, and the like. Here, the various state sensors 11 to 16 as described above are provided, but the present invention is not limited to this, and it is not necessary to mount all of the exemplified sensors.

  The door open sensor 11 is connected to a courtesy switch wiring, for example, and detects an open / closed state of the door, and becomes an intrusion sensor. Of course, a limit switch or other sensor may be separately provided on the vehicle body facing the door frame so as to detect that the door has been opened. The Doppler sensor 12 transmits a microwave or the like to the periphery, and detects a displacement (for example, a phase displacement) due to a Doppler effect of a reflected wave from the object. For this reason, the Doppler sensor 12 can detect a moving body (intruder) approaching the vehicle and becomes an intrusion sensor. The vibration sensor 13 detects vibrations using capacitance displacement, coil eddy current effect, piezoelectric material piezoelectric effect, and the like, and is a behavior sensor. The current sensor 14 detects a change in current generated in the vehicle body and serves as a behavior sensor. The tilt sensor 15 detects the tilt angle of the vehicle body and serves as a behavior sensor. The key position sensor 16 detects the position state of the ignition key, and can obtain information on the usage status of the vehicle.

  The detection outputs of these various state sensors 11 to 16 are taken into the abnormality detection routine 30. The abnormality detection routine 30 determines whether or not the detection outputs are abnormal. When it is determined that the abnormality is detected, abnormality detection information is provided. The alarm command is sent to the alarm routine 32 while being sent to the transmission routine 31.

  When the transmission routine 31 receives the abnormality detection information from the abnormality detection routine 30, the transmission routine 31 determines whether to notify the portable device 2, and sends a notification code (frame) to the transmitter 4 when the determination is notification. The notification code sent out includes information such as which state sensor 11 to 16 is abnormality detection information, and an alarm level for the abnormality detection.

  By the way, the vehicle-mounted device 1 has two activation states, one is a warning mode (armed) in which all functions are turned on and the warning operation is activated, and the other has detection outputs of the state sensors 11 to 16. However, it is a non-warning mode (disarmed) in which the warning action is canceled without performing the warning action.

  In the bidirectional communication between the in-vehicle device 1 and the portable device 2, basically, on either side, the same frame (ID + notification information) is transmitted for transmission of frames, and this is periodic with a pause time performed by the receiving side. This corresponds to reception standby. The frame reception standby is a setting in which the receiver is not turned on continuously but is turned on periodically with a predetermined pause time, and is received periodically. Operation with reduced power consumption can be performed.

(Operation of portable device 2: reception of notification code)
In reception waiting of the portable device 2, the frame received by the receiver 22 is sent to the notification processing routine 232, and the code analysis of the frame is performed in the notification processing routine 232. When the notification code is received, the notification information indicated by the notification code is output to the display panel 25 and the notification code is sent to the transmission routine 231. In the transmission routine 231, if the content of the notification code received from the notification processing routine 232 includes a response request, a response code for replying to the in-vehicle device 1 is generated and sent to the transmitter 21. . When this response code is transmitted, a response ID code indicating which of the notification codes is to be responded is attached to the frame.

  Further, the code transmitted from the portable device 2 includes a command code for instructing a warning mode, a non-warning mode, door opening and closing, and an inquiry code for referring to the security history of the in-vehicle device 1. That is, when a predetermined input switch 24 is manually operated, the transmission routine 231 receives the command, generates a corresponding code, and sends it to the transmitter 21.

(Operation of in-vehicle device 1: reception of response code)
If the frame transmitted by the portable device 2 can be received by the in-vehicle device 1 side, it is fetched from the receiver 8 to the operation determination routine 33 of the control unit 3, and the operation determination routine 33 performs code analysis. The command code corresponding to each of the abnormality detection routine 30 and the alarm routine 32 is determined and the abnormality detection routine 30 receives the command code and controls the warning mode and the non-warning mode.

  When the response code is extracted from the frame, the response code is immediately sent to the alarm routine 32. At this time, the electric field strength measuring unit 9 measures the electric field strength of the frame (received signal), and the measured electric field strength value is It is sent to the alarm routine 32.

  When receiving an alarm command from the abnormality detection routine 30, the alarm routine 32 waits for a response code for a predetermined time. During this standby time, when a response code is sent from the operation determination routine 33, the electric field strength value sent in synchronization is inspected, and if it is equal to or greater than a predetermined value, the sound alarm unit 5 and the light warning unit 6 are informed. Commanding a predetermined alarm action. In this case, since the portable device 2 responds with a response code, the user is within a range where two-way communication can be performed and can quickly return to the vehicle. Therefore, it is mild except when the notification code is a serious abnormality detection. The alarm action will be performed. For example, it may be set as appropriate, such as sounding a sound alarm weakly for a short time, or performing only a light alarm.

  If no response code is received during the standby time, the alarm command from the abnormality detection routine 30 is executed as it is. In this case, since the notification to the portable device 2 (user) is not completed, an alarm is issued. The operation will be performed in response to an emergency or serious abnormality.

  In the alarm routine 32, when the alarm operation is activated, the abnormality detection routine 30 is notified of the activation start.

  In the present embodiment, the electric field strength measuring unit 9 is provided in the in-vehicle device 1, but may be provided in the portable device 2, and in that case, when the received notification code has a predetermined electric field strength value or more. It is good also as a structure which transmits a response code.

  In this case, it is preferable that the notification code transmitted from the in-vehicle device 1 is an output smaller than usual in order to prevent electric field strength saturation at the time of reception in the portable device 2, and the response code (frame) from the portable device 2 is transmitted to the in-vehicle device 1. In order to ensure that it can be reached, it is preferable to increase the transmission power more than usual.

  The in-vehicle device 1 can have a relatively large capacity because the power source is installed in the vehicle. For this reason, the transmitter 4 can be configured to have a high output, and the transmission output of the frame can be increased. If the frame is configured to be transmitted at a high output, the portable device 2 can receive it even if it is far away from the in-vehicle device 1. However, since the portable device 2 has a small power source (battery), the transmission output cannot be increased and a frame (notification code) from the in-vehicle device 1 can be received relatively far away. The response code that does not necessarily reach the vehicle-mounted device 1 occurs.

  Therefore, in the in-vehicle device 1, when a notification code is transmitted, a response waiting time for waiting for a response code is set to a predetermined value, and if no response code is received during the response waiting time, the response waiting time has elapsed. At this point, the transmission is performed again. The code to be transmitted again at this time is a re-notification code indicating that it is a second notification, and the transmission output is set to be larger than that of the previous notification code for transmission. The re-notification code indicates that the mobile device 2 does not request a response code. When the mobile device 2 has received the re-notification code, only the notification information is displayed on the display panel 25 and the response code is displayed. Does not transmit.

  Note that the re-notification code may be set so that a response request is made without requesting a response code from the portable device 2. In other words, the in-vehicle device 1 starts a predetermined alarm operation immediately when the re-notification code is transmitted, although the setting for requesting the response code without taking the response code is not required. This is set to perform a high-level alarm operation as in the case where a response code is not obtained, and even if a response code can be received from the portable device 2 during this alarm operation, the response is processed as reference information. A method may be adopted.

  FIG. 2 is a flowchart illustrating an example of an alarm operation in the alert mode of the in-vehicle device. In the warning mode, the abnormality detection routine 30 continues to wait for detection output (monitoring) for the various state sensors 11 to 16 connected to the control unit 3 (S11), and determines that an abnormality has been detected due to some detection. If it is possible (Yes in S11), the abnormality detection information is sent to the transmission routine 31, processed into a notification code that can be transmitted in the transmission routine 31, and the frame is sent to the transmitter 4 (S12).

  The receiver 8 of the vehicle-mounted device 1 is set to operate so as to wait for reception intermittently in order to reduce power consumption. However, after the notification code is sent out in the processing step S12, the operation is switched to the continuous reception operation for continuing the reception waiting (S13), and the response code is waited (S14). This response code is waited for a predetermined time R (S15). The response waiting time R is set to a time sufficiently longer than the reception waiting time for the intermittent operation in the normal control so that the reception of the response code can be received with good timing without shifting to the next reception waiting cycle. .

  That is, the frame (reception signal) received by the receiver 8 is subjected to code analysis in the operation determination routine 33, and when there is a response code during the standby time R (Yes in the branch determination processing step S14), the alarm routine 32 receives the response code. Send a response code. At this time, the alarm routine 32 checks the electric field strength of the received signal (S16), and when it is equal to or greater than the predetermined value (Yes in the branch determination processing step S16), commands to start a preliminary alarm (S17). This preliminary alarm ends when the predetermined time e has elapsed (Yes in the branch determination processing step S18), and the alarm operation returns to the initial state (S11).

  Conversely, when the electric field strength of the received signal is less than or equal to the predetermined value (No in branch determination processing step S16), and when there is no response code during the standby time R (Yes in branch determination processing step S15), a normal alarm is issued. Is started (S19).

  The reason for inspecting the electric field strength is to confirm whether or not the portable device 2 (owner) exists in the vicinity of the vehicle. Here, if the transmission output of the portable device 2 is set to be small, the range in which the response code (frame) transmitted by the portable device 2 can be received is limited, so it is not always necessary to inspect the electric field strength.

  The alarm operation shown in FIG. 2 is for a case where the detected abnormality is mild, and the corresponding alarm operation is appropriate depending on the degree of the detected abnormality. That is, when the detected abnormality is serious or urgent, the response code returned by the portable device 2 is a control that does not wait, and a normal alarm is immediately executed when the serious or urgent abnormality is detected.

FIG. 3 is a flowchart illustrating an example of the processing operation of the portable device. The portable device 2 waits for a frame (communication signal) from the in-vehicle device 1 (S21). When a frame is received (Yes in branch determination processing step S21), the code is analyzed (S22). As a result of the code analysis, when the notification code indicates a low level alarm (Yes in branch determination processing step S23), the corresponding response code is transmitted (S24), and the alarm notification is performed on the display panel of the portable device 2 (S25). ).
Conversely, when the notification code is not a low level alarm (No in branch determination processing step S23), the alarm code is immediately notified without sending back the response code (S25).

  In the present embodiment, the response code is transmitted in all cases if the alarm is a low level alarm. However, classification is made among the low level alarms, for example, in the case of a low level alarm of the Doppler sensor 12. Sends a response code, but can take any form such as not sending a response code in the case of other types. Moreover, you may comprise so that alarm notification may not be performed in the portable device 2 at the time of a low level alarm.

  Moreover, when the structure which provides an electric field strength measurement part in the portable device 2 is taken, the measured electric field strength value can be added to a response code as data. In that case, it is possible to determine the distance to the portable device 2 in the in-vehicle device 1 and control the alarm according to the distance. Of course, by providing the electric field strength measuring unit 9 in the in-vehicle device 1, it is possible to determine the distance to the portable device 2 in the in-vehicle device 1, and thus it is possible to control an alarm according to the distance.

In the embodiment described above, the actual alarm processing executed by the in-vehicle device 1 is performed after the reception determination of the response signal from the portable device 2, but the present invention is not limited to this. For example, A preliminary alarm may be immediately executed when an abnormality is detected, and then a normal alarm may be executed when processing step S19 is reached. In addition, a preliminary alarm may be executed when an abnormality is detected, and an unalarm may be set at the stage of processing step S18 .

  By doing in this way, when the user is in the vicinity of the vehicle, a preliminary alarm is generated, so that it can be known that the security device has been operated, and the portable device 2 can be temporarily set to the non-warning mode. After entering the non-warning mode, the various state sensors 11 to 16 may stop detection, and may be configured to automatically shift to the warning mode after a predetermined time after detecting no abnormality.

  Further, with such a configuration, even if the preliminary alarm is not performed and the alarm is not alarmed, the subsequent security is not greatly affected. This is because an alarm signal is output from the in-vehicle device 1 to the portable device 2, and the user knows that some abnormality has been detected.

  As an effective case, for example, at night when there is a parking lot at home, this configuration makes it unnecessary for the vehicle-mounted device 1 to perform any unnecessary warnings and abnormal for the user. This is because the portable device 2 can inform the state. Such a warning method is generally known as silent security, but depending on the positional relationship between the portable device 2 and the vehicle-mounted device 1, the warning method of the vehicle-mounted device 1 and the portable device 2 is appropriately set. It can be set.

  Further, if the operation of the abnormality detection routine 30 is returned to the initial state after a predetermined time from the start of the alarm control, even when various state sensors continue to detect and continue to detect abnormality. If the user is in the vicinity, the alarm can be continuously suppressed, and if the user is not in the vicinity, the alarm can be generated without being suppressed. If the various state sensors 11 to 16 stop detecting and no abnormality is detected, the warning mode can be continued, and the user need not be aware of these series of operations. In addition, since the portable device 2 only needs to transmit a response code for the notification code (communication signal) from the in-vehicle device 1, it is possible to obtain a power saving effect at the same time.

  As another control method, a continuation confirmation code (whether the alarm control is to be continued from the vehicle-mounted device 1 to the portable device 2 in a stage before the abnormality detection routine 30 is returned to the initial state after a predetermined time from the start of the alarm control. If the portable device 2 receives the continuation confirmation code, it sends back a response code, and the portable device 2 within a predetermined time after the in-vehicle device 1 transmits the continuation confirmation code. If a response code is received, the alarm control may be continued.

  In the case of the above-described method of returning the abnormality detection routine 30 to the initial state after a predetermined time from the start of alarm control, if the vehicle-mounted device 1 is still in an abnormal state, it is necessary to issue a confirmation signal from the vehicle-mounted device 1 again. If the user is not in the vicinity of the vehicle, a time lag of several seconds occurs due to the reception timing of the portable device 2, and an alarm is issued when the suspicious person approaches the vehicle waiting for the user to disappear Will be delayed. However, by using such an algorithm, it is possible to shift to a smooth security system without generating a warning time lag, and it is possible to suppress unnecessary warnings when the user is near the vehicle.

  It should be noted that the vehicle mode 1 monitors the state of the vehicle key while controlling the alarm, and if it is in the ACC or IG position, it is considered that the user has entered the key, so the operation in the alert mode itself May be canceled and the non-warning mode may be set. At that time, in the previous stage of switching to the non-warning mode, a confirmation signal is issued from the in-vehicle device 1 and a response code greater than or equal to a predetermined electric field strength from the portable device 2 is received to shift again from the in-vehicle device 1 to the non-warning mode. If a response code higher than the electric field strength is not received or if a response code is not received, a more reliable security operation can be performed by issuing an alarm.

It is a block diagram which shows suitable one Embodiment of the security apparatus for vehicles which concerns on this invention. It is a flowchart which shows an example of the alarm operation | movement in the alert mode of vehicle equipment. It is a flowchart which shows an example of the processing operation of a portable machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Onboard machine 2 Portable machine 3,23 Control part 4,21 Transmitter 5 Sound alarm part 6 Light alarm part 7,20 Antenna 8,22 Receiver 9 Electric field strength measurement part 11 Door open sensor 12 Doppler sensor 13 Vibration sensor 14 Current Sensor 15 Tilt sensor 16 Key position sensor 24 Input switch 25 Display panel 30 Abnormality detection routine 31 Transmission routine 32 Alarm routine 33 Operation determination routine 23 Transmission routine 232 Notification processing routine

Claims (9)

A vehicle-mounted device mounted on a vehicle and a portable device carried by a user are each provided with a transmitter, a receiver, and a control means for controlling the operation of each part, and for security operation between the vehicle-mounted device and the portable device. A vehicle security device that performs two-way communication,
The control unit of the in-vehicle device waits for a detection signal from a state sensor that detects a state provided in each part of the vehicle, monitors the current state of the vehicle, and determines whether or not the vehicle is in an abnormal state. And having a function of transmitting a notification signal including an alarm level for abnormality detection to the portable device when an abnormality is detected ,
An electric field strength measuring means is provided in the portable device,
The control unit of the portable device analyzes the received notification signal, transmits a response signal in response to the notification signal when the alarm level indicates a low level alarm, and when the alarm level is not a low level alarm. A function for performing control without transmitting a response signal, a function for performing alarm notification when the alarm level is not at least a low level alarm, and information on the electric field intensity measured by the electric field intensity measuring means provided in the portable device. Has function,
The control unit of the in-vehicle device waits for a response signal from the portable device after transmission of the notification signal, and if the response signal is not received during the set response signal waiting time, or the response signal is received. Yes, when the electric field strength measured by the electric field strength measuring means provided in the portable device from the information on the electric field strength does not exceed a predetermined value, a normal alarm operation is performed according to the abnormal state, and the response signal is received. The vehicle security device is characterized in that when the electric field intensity exceeds a predetermined value, control is performed not to perform the normal alarm operation . The vehicle security device according to claim 1, wherein the control unit of the portable device issues an alarm notification when the alarm level is a low level alarm. The vehicular security device according to claim 1 or 2, wherein a transmission output in the in-vehicle device is set to a value larger than a transmission output of a response signal in the portable device. One of the state sensor, a vehicle security device according to any one of claims 1 to 3, characterized in that the Doppler sensor for detecting the displacement caused by the Doppler effect of reflected waves from the object. One of the said state sensors is an impact sensor which detects a vibration using the displacement of an electrostatic capacitance, the eddy current effect of a coil, the piezoelectric effect of a piezoelectric material, etc. , Any one of Claim 1 to 4 characterized by the above-mentioned. or vehicle security device according to item 1. One of the state sensors is a key position sensor that detects the state of the ignition key,
Wherein the vehicle device, the vehicle security device according to any one of claims 1 to 5 is detected by the key position sensor in showing the use position, characterized in that performs control to cancel the warning戒動operation . The vehicle security device according to any one of claims 1 to 6 , wherein the control that does not perform the normal alarm operation is to perform an alarm having a lower alarm level than the normal alarm operation or not to perform an alarm. . The control means of the vehicle-mounted device from claim 1, characterized in that for performing control to return to the initial state after a predetermined time from the transmission of the report signal has elapsed to the mobile device upon detection of an abnormality 7 The vehicle security device according to claim 1. The vehicle security device according to any one of claims 1 to 8 , wherein alarm means for issuing an alarm by the alarm operation is incorporated in the in-vehicle device.

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