JP2015028797A - Electronic apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus and a program capable of generating an alarm on the basis of position information from the first time even in a new target.SOLUTION: A target detection apparatus 10 includes: a GPS receiving part 12 for detecting a position of its own vehicle position; an internal nonvolatile memory 17 for storing point data including position information of a point specifying an alarm target collected by the own apparatus; and a control part 18 which, when receiving position information of a point specifying an alarm target transmitted from the other target detection apparatus 10', registers point data including the received position information in the internal nonvolatile memory. When a present position and the position information of the point registered in the internal nonvolatile memory are set positional relation, the control part generates an alarm. When another target detection apparatus exists in the surrounding, the control part transmits the position information of points included in partial or all point data stored in the internal nonvolatile memory.

Description

  The present invention relates to a target detection device and a program for detecting a target and giving an alarm based on position information.

  2. Description of the Related Art A target detection device that detects and notifies a microwave transmitted from a vehicle speed measurement device is known. This target detection device recognizes the reception of microwaves from the vehicle speed measurement device even when it receives microwaves sent from a malfunction source such as an automatic door of a convenience store using the same frequency as the speed measurement device. As a result, there is a problem that an unnecessary alarm is issued. In view of such circumstances, recent target detection devices store position information of malfunction sources, recognize the position of the vehicle by GPS, and detect the microwave when the vehicle is positioned at the malfunction source. Also, it is possible to prevent unnecessary alarms from being issued by controlling so as not to generate alarms.

Further, the device for measuring the speed of the vehicle is not limited to the one using the above-mentioned microwave. For example, a vehicle traveling on the road is detected by two loop coils embedded and installed under the road. Some vehicles measure based on a time difference between detection signals output from two loop coils. This type of vehicle speed measurement device cannot be detected by the target detection device using the above-described microwave detection because microwaves are not output.

Therefore, the target object detection device that stores and holds the position information of the detection object and issues an alarm when the position of the vehicle detected by the GPS and the position of the detection object are in a predetermined relationship. There is.

In the target object detection apparatus based on this type of position information, the freshness / accuracy of the position information of the detection object stored in the storage unit is an important factor. That is, when the stored location information is based on old installation information, an alarm (false alarm) is issued at a place where the target object to be detected has already been removed, or the target object to be detected is Although the location exists, the location is not registered in the storage means and an alarm is not issued, and the reliability of the alarm is lowered.
In order to solve such a problem, the user needs to update the position information of the detection target that is stored and retained even after the target detection device is purchased. Such update processing includes updating using an external nonvolatile memory such as an SD card, downloading the latest position information data from a server online, and storing the data in the storage unit of the target object detection device, etc. Is done. In addition, as disclosed in Patent Document 1, there is a technique in which, when a radio wave to be detected is received, position information of a detection target determined based on the received position is stored and held in a storage unit.

JP-A-9-27096

  When updating the latest location information by using the former SD card or downloading from the server online, the user needs to actively perform the update process by his / her own actions, which is cumbersome In addition, there is a possibility that old location information may remain due to forgetting to update.

  The technique disclosed in the latter patent document 1 is automatically registered and thus solves the above problem. In any case, the first time, it is necessary to receive the radio wave emitted from the detection target. In the first reception, the presence of the detection target cannot be recognized in advance based on the position information.

  The present invention has been made to solve such a problem, and even if it is a new target, an alarm can be made based on position information from the first time, and information for that purpose is provided. It is an object of the present invention to provide a target detection device that can be used.

  In order to achieve the above-described object, a target detection apparatus according to the present invention includes (1) a position detection unit that detects the position of the host vehicle, a database that stores position information of the target, and the position detection unit. When the detected position information and the position information of the target object stored in the database are in a set positional relationship, the alarm control means for issuing an alarm and the position of the point that identifies the alarm target collected by itself A point data storage unit that stores point data including information, and a transmission control unit that transmits position information of at least the points included in a part or all of the point data stored in the storage unit. .

The database corresponds to the “internal nonvolatile memory 17” in the embodiment. The point data storage unit corresponds to the “internal nonvolatile memory 17” in the embodiment. “Self-collected” means collection by automatic registration as in the inventions of (8) and (9), collection by manual registration as in the inventions of (10) and (11), (12) Various methods can be taken, such as acquiring and collecting information registered by other target object detection devices, as in the present invention.

  The transmission control means transmits point position information (wireless transmission) at an arbitrary timing. Then, if another target detection device capable of receiving the transmitted position information is present around the target detection device of the present invention, the other target detection device takes in the received position information and thereafter The alarm based on the position information for the alarm target (target) corresponding to the position information can be performed. In other words, the “other target object detection device” can issue an alarm based on the position information from the first time even for a new target object. And the target object detection apparatus of this invention can provide effective information with respect to the other target object detection apparatus which concerns. Moreover, although it is the timing which transmits position information, you may make it transmit regularly or irregularly, but when other target object detection apparatuses exist around like the invention of following (2). Good to send.

  (2) The transmission control unit has a function of transmitting at least the position information of the point included in the point data in response to receiving a notification request signal wirelessly transmitted from another target detection device. Good. In the embodiment, the notification request signal corresponds to “own vehicle position information”. In the embodiment, by transmitting the vehicle position information, the other target detection device that has received the vehicle position information can recognize both positions, for example, displaying both on the display device. It is now possible to visually confirm that the system actually exists (the system is operating), but if no such function is provided, it is simply determined in advance without notifying the location information. A notification request signal such as a command may be used. If the target detection device receives such a notification request signal, it can be confirmed that there is another target detection device that can use the information of the point data stored in the surroundings of the target detection device. If position information is transmitted at that time, communication can be performed efficiently (transmission is not wasted). The timing and the number of times of transmitting the position information of the point may be sent once or N times after receiving the notification request signal, or may be sent at a predetermined interval after being received or received. It may be transmitted periodically (until it can no longer be received) periodically or irregularly.

  (3) On the premise of the invention of (2), the transmission control means has a function of stopping the transmission of the point data when the notification request signal cannot be received for a certain period (1 minute in the embodiment). Good. This is because if the target cannot be received for a certain period of time, it can be determined that the other target detection devices have separated. Moreover, even if it is close, it can be estimated that communication is not possible (the other party cannot receive the transmitted position information), so unnecessary transmission processing is not required. Note that even if other target detection devices exist in the surroundings, the communication request line may not be received several times due to the communication line being busy, etc. As in the present invention, it is preferable to transmit for a certain period.

  (4) The transmission control means may extract point data existing around the current position and set the extracted point data as a transmission target. The point data to be transmitted may be all owned by itself, but if the number of possessed points increases, it takes time to transmit the position information of all the point data, and information necessary for other target object detection devices is obtained. May not be able to send. Therefore, by making the point data existing around the current position as a transmission target, it is possible to efficiently transmit information necessary for other target detection apparatuses.

  (5) On the premise of the invention of (4), when there are a plurality of point data to be transmitted, one point data to be transmitted in one transmission process is assumed to be selected one by one in order. It is good to. By using one transmission target, the time for occupying the communication channel in one transmission process can be shortened. Thereby, even when a plurality (a large number) of target detection devices exist in the vicinity, each target detection device can communicate, and information can be acquired effectively.

  (6) A registration date when the point is registered is added to the point data, and when the transmission control means transmits a part of the point data, the one with the latest registration date is preferentially transmitted. It is good to target. If the registration date is old, there is a high possibility that the partner's target detection device has already been transmitted and is also held as point data (if the registration date is new, there is a high possibility that the partner does not have it). When the registration date is today, if the detection target is a speed measurement device, there is a possibility that the current speed measurement is being performed, and information with higher importance and urgency can be efficiently transmitted.

  (7) A registration date when the point is registered may be added to the point data, and when the registration date becomes older than a set reference, it may be excluded from the transmission target. As described in (6), old data may have already been distributed, and there is a possibility that there is actually no alarm target at the position of the point and it is not necessary to notify. Thus, by not transmitting the information with the old registration date, it is possible to reduce the load generated by the transmission process. “Not transmitting” may be left as data so that only transmission processing is not performed, or the data itself may be deleted so that it cannot be physically transmitted.

  (8) Position of a point that has an automatic registration function for automatically registering the point data upon reception of microwaves that match a set condition, and that identifies the alarm target collected by the self stored in the point data The information may be a current position detected by the position detection unit when a microwave that meets a set condition is received.

  (9) The position information of the point is compared with the position information of the target stored in the database, and if it is shorter than the set distance, the point data is registered for the point by the automatic registration function. Do not do it. When the “distance” is short, it is possible to estimate that the registered point and the target stored in the database are the same. In this case, by adding no point data, additional processing of unnecessary information is performed. In addition, it is possible to suppress the occurrence of unnecessary transmission and the like.

  (10) Based on the invention of (9), provided with a manual registration function for registering the point data in accordance with a registration instruction from the user, the position of the point specifying the alarm target collected by the self stored in the point data The information may be the current position detected by the position detection unit when the registration instruction is given. If it does in this way, the detection target object which does not transmit a microwave, or the detection target object which transmits a microwave is preparing (during installation), but the microwave is not actually transmitted, but there is a possibility that it may be transmitted after that. Even expensive ones can register and provide information. The registration instruction is, for example, an instruction using a set switch operation or voice input.

  (11) A manual registration function for registering the point data in accordance with a registration instruction from the user is provided, and the position information of the point specifying the alarm target collected by the self stored in the point data is the registration instruction. An alarm mode based on position information registered using the automatic registration function and an alarm mode based on position information registered using the manual registration function. It should be different.

  (12) On the premise of the inventions of (10) and (11), if the number of registration processes by the manual registration function is performed more than a threshold value within a reference period, the transmission control means has at least a manual registration function It is recommended that transmission of point data registered using is suppressed. In the embodiment, the reference period is set to one day, but may be a time or a plurality of days. The manual registration function can be manipulated unnecessarily to prevent unnecessary information from being sent to the surroundings. The target data for transmission suppression may be all (including automatically registered data). If the above conditions are met, the registration process itself may be invalidated (not performed).

  (13) The point data acquired by another target detection device may be acquired and stored in its own point data storage unit. (14) The point data may be registered in association with a unit ID that identifies the target detection apparatus that first registered the point. (15) It may be provided with means for periodically transmitting the position of the own vehicle (own vehicle position information) detected by the position detection unit.

  (16) The transmission control means performs transmission based on a user setting as to whether or not to perform transmission, stores an experience value based on the number of transmissions, and the alarm control means is based on the experience value. It is recommended that the alarm mode be different. You may vary the alarm mode by a 2nd alarm control means. Unlike the reliability (reliability), this experience value is updated so that the experience value becomes larger (higher) as the number of transmissions increases.

  Since it is desirable that whether or not to transmit can be arbitrarily set according to the user's intention, it is also possible to prevent transmission according to the user setting as described above. However, it is advantageous for the entire user to exchange as much position information as possible. Therefore, for example, as more information is provided, the experience value becomes higher, and the alarm mode evolves, so that the number of users who transmit is increased. According to the present invention, it is possible to provide an environment in which a user is willing to transmit position information.

  (17) A wireless reception unit that receives position information of a point that specifies an alarm target transmitted from another target detection device, and point data that includes the position information received by the wireless reception unit is stored in the point data storage unit. A second alarm is issued when the point data registration means to be registered, the position information detected by the position detection unit, and the position information of the points registered in the point data storage unit are in a set positional relationship. And an alarm control means. The second alarm control means may be integrated with the alarm control means or may be independent. In this way, the target detection device provides information about the points collected by itself to other target detection devices, and acquires information about the points collected by the other target detection devices. In this way, information about points can be shared, and data can be collected efficiently.

  (18) A position detection unit that detects the position of the host vehicle, a database that stores position information of the target, position information detected by the position detection unit, and position information of the target stored in the database Is set in a positional relationship, an alarm control means for issuing an alarm, a radio reception unit for receiving position information of a point specifying an alarm target sent from another target detection device, and the radio reception thereof Point data registration means for registering point data including position information received by the unit in the point data storage unit, position information detected by the position detection unit, position information of the points registered in the point data storage unit, , May be provided with a second alarm control means for issuing an alarm when the positional relationship is set.

According to the present invention, position information about points collected by other target object detection devices can be acquired, and an alarm based on the position information can be made based on the acquired position information. An alarm can be made based on the information.

  (19) Point data on points that can be regarded as the same as the points that specify the alarm target corresponding to the received position information, with the reliability information that identifies the probability that the point is an alarm target added to the point data Is already registered in the point data storage unit, and the target detection device that first registered the registered point data is different from the target detection device that first registered the received point data. A reliability update function for controlling the reliability information of data to be high may be provided. When the same point is registered as point data with a plurality of different target detection devices, the reliability of the point data is increased. Therefore, when alarming by the second alarm control means, if the mode of the alarm is changed in accordance with the reliability information (the higher the reliability, the higher the importance of the alarm so that the driver will pay attention, By notifying the reliability level together, the driver can be provided with information for determining the likelihood of the alarm based on the point data), and an effective alarm can be performed.

  For example, if the position data is close (within a set value), it can be determined that the point data is the same for the same point. The determination as to whether the target detection devices detected / registered at the point are the same or different can be made, for example, according to the invention shown in (21) and (22) below.

  (20) In addition, reliability information that identifies the probability that the point is an alarm target is added to the point data, and the target detection device on the transmission side transmits the unit ID and point data of “self”. The target object detection device on the receiving side is already registered in the point data storage unit for point data that can be regarded as the same point as the point that identifies the alarm target corresponding to the received position information, and the unit of the point received this time When the ID and the unit ID stored in the storage unit are different from each other, a reliability update function for controlling the reliability to be high may be provided.

  (21) In the reliability update function, when the position information of the point data stored in the point data storage unit and the position information received this time are different from each other, they are first registered by different target object detection devices. It is possible to perform the update process of reliability information.

  (22) A unit ID of a target detection device registered first is added to the point data, and the unit ID is associated with position information of a point sent from another target detection device, The reliability update function determines whether or not the received unit ID is registered with a different target object detection device by comparing the received unit ID with the unit ID of the point data stored in the point data storage unit. May be.

  (23) If the received position information is within the distance set from the position information of the point data already registered in the point data storage unit, the point data registration means registers the point data based on the received position information. Do not do it. If such conditions are met, the possibility of the same point is high, and registering a plurality of point data based on the same point is not preferable because it causes not only a wasteful specification of memory capacity but also frequent alarms. Solvable. Moreover, even if it is actually another point, an alarm is given in the vicinity thereof, so that there is no problem in practical use.

  (24) The other target detection device is a target detection device as defined in (17). If the position of the own vehicle sent from the other target detection device is received, the received target detection device is received. It is preferable to provide display control means for displaying the position of the vehicle and the other target detection device on the display unit based on the position of the vehicle and the position information of the vehicle detected by the position detection unit. If it does in this way, since the position of self and other target object detection devices will be displayed on a display part, the user who looked at it can confirm that the system is operating normally, and other When the alarm based on the point is not issued even though the target object detection device is displayed, it can be confirmed that the probability that there is no alarm object around is higher.

  In the present invention, a position detection unit (GPS reception unit 12) that detects the position of the vehicle and a point data storage unit (internal non-volatile) that stores point data including the position information of the point that identifies the alarm target collected by itself. Memory 17) and control means (control unit) for registering the point data including the received position information in the point data storage unit when receiving the position information of the point specifying the alarm target sent from another target detection device 18), and the control means issues an alarm when the current position and the position information of the points registered in the point data storage unit are in a set positional relationship. Further, when another target detection device exists in the vicinity, the control unit transmits the position information of the points included in a part or all of the point data stored in the point data storage unit. With this configuration, point data can be shared between target detection devices, and even if a new target (alarm target) can be registered as an alarm target point, An alarm based on the position information can be issued before the first reception of the microwave from the target (first time). Moreover, when the microwave is received after that, it can be confirmed that the information of the point is reliable. If reliability information is added, it can be updated to increase the reliability based on the reliability information.

  The program of the present invention is a program for causing a computer to function as each means described in any one of (1) to (24) above. That is, in the embodiment, each unit is realized as a function implemented in the control unit 18. This function can be configured as an application program executed by a computer, and the program can be distributed via a recording medium or downloaded.

  In the present invention, even a new target can be alerted based on position information from the first time, and information for that purpose can be provided.

It is a figure which shows suitable one Embodiment of this invention. 4 is a flowchart illustrating a function for transmitting own vehicle position information and point data implemented in a control unit 18; 3 is a flowchart illustrating a reception function implemented in a control unit 18; It is a figure which shows an example of the alarm screen using a display part. It is a figure explaining the transmission / reception function of own vehicle position information and point data. It is a figure explaining the transmission / reception function of own vehicle position information and point data. It is a figure explaining the transmission / reception function of own vehicle position information and point data. It is a figure explaining the transmission / reception function of own vehicle position information and point data. 4 is a flowchart illustrating a reliability update function implemented in a control unit 18; 4 is a flowchart illustrating a reliability update function implemented in a control unit 18; It is a figure explaining a reliability update function. It is a figure explaining the alarm based on point data. It is a figure explaining control of transmission timing. It is a figure explaining control of transmission timing.

FIG. 1 shows a preferred embodiment of the present invention. The target detection device 10 is a device that acquires current position information of a vehicle and radio wave information flying from the outside, and issues a warning / notification when the acquired information matches a set condition. This target object detection apparatus 10 includes a microwave receiving unit 11, a GPS receiving unit 12, a wireless transmission / reception unit 13, an input unit 14, a display unit 15, a speaker 16, an internal nonvolatile memory 17, and a control unit. 18 and an SD slot 19. These devices / members are mounted in one case or divided into a plurality of cases as appropriate.
The microwave receiving unit 11 receives microwaves in a predetermined frequency band and sends the received signals to the control unit 18. The predetermined frequency band is, for example, a frequency band including a microwave frequency emitted from the vehicle speed measuring device. The GPS receiving unit 12 receives a GPS signal, obtains a current position from the received GPS signal, and sends position information (longitude, latitude) of the obtained current position to the control unit 18. In this embodiment, the wireless transmission / reception unit 13 transmits / receives data to / from other nearby target detection devices 10.

  The input unit 14 is an interface for the user to give various settings / instructions to the control unit 18, and is not shown in the figure, such as an operation switch, an operation unit directly touched by the user such as a touch panel, or a remote control receiver. There are devices that receive instructions and the like by performing data communication with an external remote controller (mobile device: slave device). One or more of these are provided.

  The display unit 15 is realized using, for example, an organic EL display or a liquid crystal display. The internal nonvolatile memory 17 is composed of an EEPROM or the like. In the internal non-volatile memory 17, information related to a certain target at the time of shipment (position information including longitude / latitude, type information, etc.) is registered. Further, various position information can be registered / updated in the internal nonvolatile memory 17 according to use.

  The slot of the SD slot 19 is exposed on the surface of the case, and an SD memory card 20 that is an external nonvolatile memory can be detachably mounted. The SD memory card 20 stores update information such as information on a new target (position information including longitude and latitude, type information, etc.). The update information stored in the SD memory card 20 is stored (downloaded) in the internal nonvolatile memory 17 via the control unit 18, and data is updated.

In this example, the SD slot 19 is mounted in the case. However, a terminal for connecting a memory card reader to the case, for example, without incorporating a device for mounting an external nonvolatile memory such as the SD slot 19 is provided. (Adapter jack) may be provided, and by connecting a memory card reader to the adapter jack, data stored in a memory card attached to the memory card reader may be taken in.

  The control unit 18 includes a microcomputer including a CPU, a memory, an I / O, and the like, and can access the SD memory card 20 that is an external recording medium mounted in the SD slot 19 to read / write data. For example, when the SD memory card 20 stores the position information of the target to be updated, the control unit 18 reads the data to be updated and stores it in the internal nonvolatile memory 17 to perform the update process. Yes.

  The control unit 18 executes predetermined processing based on information input from the various input devices (reception unit and the like) described above, and uses the output devices (display unit 15 and speaker 16 and the like) to generate predetermined alarms and messages. Is output. As the predetermined processing for determining the alarm content based on the information input from the input device, basically the same processing as that of the prior art can be used. That is, when the current position information acquired from the GPS receiver 12 and the position information of the target to be detected stored in the internal nonvolatile memory 17 are in a predetermined positional relationship (such as within a set distance), When a signal having a certain condition is received / acquired, such as when a predetermined microwave is received by the microwave receiver 11, a corresponding alarm is output. Note that the alarm using the speaker 16 includes a buzzer and voice. Although not shown, an alarm lamp such as an LED may be provided as an output device.

  In the present embodiment, the control unit 18 periodically acquires the current vehicle position information from the GPS receiving unit 12 (for example, at intervals of 5 seconds), and stores / holds it in the memory in the control unit 18 or the internal nonvolatile memory 17. Update your vehicle location information regularly. When a set event occurs, the control unit 18 creates point data (target object position information, etc.) from the vehicle position information at that time, and stores it in the internal nonvolatile memory 17. The set event includes, for example, a case where a set input is made via the input unit 14 such as a specific switch operation or a case where a specific microwave is received by the microwave receiving unit 11. The specific microwave is a microwave estimated to be emitted from the vehicle speed measurement device. Note that the determination of whether or not the microwave from the vehicle speed measuring device is based on the frequency of the simply received microwave will also register radio waves from a malfunctioning source such as an automatic door. The determination can be made based on the microwave reception level. As a technique for discriminating between the radio wave from the malfunctioning source and the radio wave from the vehicle speed measuring device to be detected based on the received microwave, a conventionally known technique can be used, and detailed description thereof will be omitted. In addition, the case where the point data registration instruction is manually received by the switch operation is, for example, when the person on the vehicle recognizes that it is measuring speed or preparing for it. Certain switch operations may be performed. This makes it possible to register point data (manual registration) based on manual recognition of the installation position of the speed measurement device regardless of whether or not microwaves are received.

  The control unit 18 wirelessly transmits the vehicle position information to the outside (surrounding) using the wireless transmission / reception unit 13 periodically (for example, every 5 seconds). In the present embodiment, the transmission processing of the own vehicle position information and the registration processing of the own vehicle position information in the memory are both performed at intervals of 5 seconds, but both processing intervals may be the same or different. May be. Further, when the same as in the present embodiment, each processing timing is the same, that is, the vehicle position information may be acquired and stored in the memory and transmitted, or each processing may be performed independently of each other. (Store, send) may be executed. The own vehicle position information transmitted as described above is received by the target object detection device 10 'when another target object detection device 10' exists in the vicinity.

Furthermore, if the control part 18 confirms presence of other target object detection apparatus 10 'around, it will transmit the point data which self holds. The presence of the other target detection device 10 'is confirmed by, for example, receiving the vehicle position information of the other target detection device 10' transmitted from the other target detection device 10 '. be able to. The transmitted point data is received by another target detection device 10 'existing around. The point data received in this way is stored in the internal nonvolatile memory 17 of the other target object detection apparatus 10 ′. In other words, the point data held by the other target detection device 10 'is transmitted in the same manner as described above. Therefore, when the target detection device 10 receives the point data, the internal nonvolatile memory 17 To store.

In this way, in the internal nonvolatile memory 17, the point data registered by the event occurrence and the point data acquired from the other target detection device 10 ′ received via the wireless transmission / reception unit 13 are registered. .

And the control part 18 performs alarm control also based on this point data. That is, the control unit 18 issues an alarm when the current vehicle position obtained from the GPS receiving unit 12 and the position information specified by the point data are in a predetermined relationship (within a certain distance). Therefore, not only the point data collected by itself but also the point data collected by the other target detection device 10 'is used to perform an alarm. By acquiring point data in advance from the target detection device 10 ', an alarm based on the position information can be performed. That is, when point data has not been received from another target detection device 10 ', the target detection device 10 receives a microwave emitted from a target (microwave transmission source) corresponding to the point data. However, in this case, the presence of the detection target can be recognized in advance based on the position information.

Furthermore, when transmitting point data, all the point data stored in the internal non-volatile memory 17 is transmitted when transmitting the point data including the point data acquired from the other target detection device 10 '. By doing so, point data is shared among multiple target detection devices, point data in various regions can be collected efficiently, and alarms based on appropriate point data and own vehicle position information can be issued it can.

Furthermore, when the point data is registered by a manual switch operation, for example, when the operation is performed based on the fact that the speed measurement is performed in the opposite lane, the opposite lane is The target detection device mounted on the traveling vehicle acquires the point data registered based on the switch operation so that the speed is measured in advance of the road on which the vehicle is traveling. I can know that.

  Next, a specific processing function for performing the above point data registration and transmission / reception processing will be described. First, the vehicle position information stored / held in the internal nonvolatile memory 17 includes a unit ID for specifying (identifying) the target detection device, latitude / longitude information for specifying the current position of the target detection device, including. Furthermore, the vehicle position information may include an experience value that is the number of times point data is transmitted / received to / from another target object detection device.

For example, the experience value is transmitted based on a user setting for whether or not to perform transmission, and an experience value (simply, the number of transmissions) based on the number of transmissions is stored. When the control unit 18 issues an alarm, the alarm mode may be changed based on the experience value. The warning mode is different, for example, the higher the experience value, the more it is decorated, the design that is displayed on the display unit is changed, the more useful information is notified, etc. Good. Since it is desirable that whether or not to transmit can be arbitrarily set according to the user's intention, it is also possible to prevent transmission according to the user setting as described above. In this case, by making the alarm mode different based on the experience value, the user chooses to transmit actively, the point data shared between the users increases, and the effectiveness and benefit of the system Will increase.

  On the other hand, the point data includes information that associates a unit ID, latitude / longitude information, a registration date, a registration attribute, and a reliability. The unit ID is a code for identifying the target object detection device 10 in which the point data is registered, and for the point data registered by itself regardless of whether it is manual or automatic, the unit ID of itself is registered. The latitude / longitude information is position information indicating (identifying) the position where the point data exists. The registration date is data for specifying the date when the point data is registered, and may include time information. The registration date information can have an internal clock and can use the clock information or use a GPS signal received by the GPS receiver 12.

  The registration attribute is a parameter for identifying a registration factor, and “automatic registration” indicating a point automatically registered based on reception of a desired microwave and “manually” indicating a point manually registered based on a user operation. There is “registration”. In this manual registration, for example, the registration attribute in the case of point data registered using an external nonvolatile memory such as an SD memory card is also “manual registration”.

In addition, when a point for which automatic registration is prohibited is determined as a malfunction source, the registration attribute is “automatic registration prohibited”. The point where this automatic registration is prohibited is, for example, when a microwave is received in the same or nearby area thereafter, it is determined as a radio wave from a malfunctioning source based on the information, and a predetermined process (no alarm is issued, Receiving sensitivity can be lowered, and point data cannot be automatically registered).

  The reliability is information on the reliability (property of target object to be detected) of point data. In the present embodiment, the reliability is defined by a numerical value, and the reliability (reliability) increases as the value increases. At the time of registration, “1” is set as a reference value, and when point data is registered at the same point even in different target detection devices, the reliability is updated so as to increase the reliability. Depending on the reliability value, the way of display and alarm can be changed. Based on the above-described configuration, the following functions are implemented in the control unit 18.

* Automatic registration function of point data When the control unit 18 receives a microwave that meets a predetermined condition, the control unit 18 registers the point data using the reception as a trigger. The registration destination of the point data is the internal nonvolatile memory 17. The predetermined condition is that the frequency of the received microwave is within a preset range, is sudden and short (for example, a continuous reception time of 3 seconds or less), and the reception level is high. A high reception level means that the reception level is higher than the reception level of microwaves emitted from a measurement device that constantly outputs microwaves, such as an automatic vehicle speed measurement device fixedly installed on the side of a road. The reception level is set to a level that is one or more stages higher than the reception level of the microwave from the automatic vehicle measurement device that is always output, by dividing the receivable range into a plurality of stages (for example, six stages).

  The control unit 18 that has recognized that a microwave that meets the above conditions has been received is obtained from the date (registration date) when it was received, its own unit ID, and the GPS receiver 12 when it was received. The latitude / longitude, the registration attribute = “automatic registration”, and the reliability = “reference value: 1” are associated and registered as point data.

Normally, in the case of a detection target that always outputs a microwave, such as a fixed speed measuring device, the position information is registered in advance in the internal nonvolatile memory 17 and is based on the position information. An alarm is given. Therefore, even if microwaves are received from the speed measuring device, there is no need to register point data based on the received microwaves. Therefore, like the fixed speed measuring device, a predetermined area (for example, a zone / area within a radius of 1 km) centered on a pre-registered target is an automatic registration prohibited area, and within the automatic registration prohibited area, Even if a microwave that meets the conditions for automatic registration is received, the point data is not registered based on the reception.

(Support for non-GPS positioning)
Furthermore, when a predetermined microwave is received, the GPS signal may not be measured. At the time of GPS non-positioning, since the current position information cannot be recognized, the point data cannot be registered. However, when the vehicle is traveling in places where GPS signals can be received intermittently, such as under an overpass, the current vehicle position based on GPS positioning is obtained after receiving a predetermined microwave. There are things that can be done. Therefore, even if it is non-positioning when a predetermined microwave is received, if positioning can be performed in a relatively short time (for example, within 5 seconds), registration of the point data as latitude / longitude information on the positioning point I do. Even if the vehicle travels at a speed of 100 km / h, it moves only about 138.9 m in 5 seconds, so there is no problem even if the above position is registered as the point position, and the point data is registered. The effect by things becomes higher. If there is no location that can be measured within 5 seconds, the accuracy of the position information is lowered, so automatic registration is not performed. This GPS non-positioning correspondence may also be performed during manual registration.

* Point auto-registration prohibition function When microwaves from a malfunctioning source such as an automatic door are received, it coincides with the above predetermined condition, and it is judged as microwaves from the target to be detected and registered as point data There is a risk of it. In the case of a microwave that meets a predetermined condition, it is difficult to distinguish whether it is from a target to be detected such as a speed measurement device or from a malfunction source by one reception. Therefore, in the present embodiment, when a predetermined condition is met, the control unit 18 once determines that the target is from the target to be detected, registers it as point data (automatic registration), and then determines from the subsequent reception status. When it is determined that the microwave is from a malfunctioning source, control is performed to change the registration attribute to “automatic registration prohibited”.

As described above, the condition for changing to “automatic registration prohibition” is that the same point is received N times (for example, three times) on different days. That is, in the case of a malfunction source such as an automatic door, microwaves are emitted at least when the store is open (during operation), so that the microwaves can be received even if the vehicle travels in the vicinity on a different day. . On the other hand, in the case of a mobile speed measuring device, although it is received multiple times on the same day, it is not fixed, so it is emitted from the speed measuring device at the same point on a plurality of different days within a certain period. There is little chance of receiving microwaves. Therefore, when microwaves that meet a predetermined condition are received on different days at the same point, specifically on three different days, it is determined that the microwaves are from a malfunctioning source, and the control unit 18 determines the corresponding point data. The registration attribute was changed to "Auto registration prohibition". Even if microwaves from the same malfunctioning source are received, there is little possibility that the positions where they are received are completely the same point. Therefore, in the present embodiment, when a microwave that meets the above-described automatic registration condition is received within a radius of 200 m centering on the position of a point whose registration attribute has already been registered and point registration is automatic registration. The microwave is emitted from the same transmission source as the point data.

The management may store the received date in the same table in association with the point data, or may provide a storage area for registering the separately detected date. Since it is necessary to recognize that the data has been received three times on different days, for example, an area is provided in the point data to store the detection dates detected after the registration date together with the registration date. When the control unit 18 receives a microwave that meets the predetermined condition, the control unit 18 searches for a registration area of the point data in the internal nonvolatile memory 17 using the detected position as a key. The distance between the latitude / longitude information and the current position is calculated, and it is determined whether the calculation result is 200 m or less. If it is 200 m or less, the registration date stored in the point data is compared with the detected current date, and if they are different, the current date is registered as the detection date. If the detection date is already registered, the microwaves emitted from the same transmission source are received on three different days when the current date is different from both the registration date and the detection date. As a result, the registration attribute of the point data is rewritten to “automatic registration prohibited”.

When the registration attribute of point data is “Prohibit automatic registration”, the automatic registration prohibited area is within 200m centering on the position (latitude / longitude) of the point, and it matches the conditions of automatic registration in the automatic registration prohibited area. Even if a microwave is received, point data is not registered based on the reception, and an alarm is not generated based on the point data.

Even if the registration attribute described above is “automatic registration prohibited” or an automatic registration prohibited area set based on a position registered as a regular target, a manual registration instruction or an external nonvolatile memory ( When there is a registration instruction using the SD memory card 20), the control unit 18 registers the point data (the registration attribute is “manual”) based on the instruction.

* Limitation of manual registration The automatic registration mentioned above cannot be performed when speed measurement without using microwave or when the output time of microwave is extremely short. However, the driver who has passed the site where the speed is being measured can confirm this site visually. Therefore, it is preferable that manual registration can be performed by a simple operation such as pressing a predetermined switch. This point is as described above.

  On the other hand, there is a possibility that a person who registers (including mischief) will appear unnecessarily, and if this is done, a large number of points are added to other target object detection devices, and alarms occur frequently and become complicated. Therefore, when the manual registration operation is performed more than the set number of times within a set period such as one day, the control unit 18 restricts transmission and disables transmission, or is manually registered during that time. Perform processing to delete point data. Thereby, said troublesome behavior can be prevented, registration of point data based on appropriate manual registration and notification to other target object detection devices can be performed.

* Point Data Transmission Function As described above, each target detection device transmits its own vehicle position information periodically (at intervals of 5 seconds). Therefore, when the control unit 18 receives the vehicle position information of another target detection device via the wireless transmission / reception unit 13, it means that there is another target detection device around. Therefore, the point data held by itself is transmitted. The point data transmitted at this time is not only point data created and registered by itself, but also point data received from other target detection devices.

The items of point data are at least the distinction of point data, position information, and unit ID. As in the present embodiment, when there is reliability as an item of point data, the reliability may be transmitted together, or may not be transmitted in order to reduce the communication time. Even in the case of transmission, the reference value = 1 may not be transmitted, and may be transmitted only when the reliability is updated. The unit ID is a unit ID registered as point data, that is, an ID of the target object detection device that initially registered the point data. For example, in the case of self-registered / manually registered point data, it becomes its own unit ID, but in the case of point data received and registered from another target detection device, another target detection device unit ID.

As the point data to be transmitted, all the point data held by itself may be transmitted, or a part of the point data may be selected and transmitted. When part of the point data is transmitted, the point data to be transmitted may be selected randomly or according to a predetermined rule. Data communication using the wireless transmission / reception unit 13 of this embodiment is about 2400 bps at the earliest. Therefore, it is not possible to send a large amount of data at once. Therefore, the control unit 18 selects point data to be transmitted at a time according to a predetermined rule. In this embodiment, the predetermined rule is preferentially selected in the vicinity of the current vehicle position information. As a result, the other target detection apparatus that receives the transmitted point data can preferentially receive the point data in the vicinity of the vehicle at that time, and thus efficiently obtain timely information. be able to.

  Specifically, the vehicle position information stored / held in the memory in the control unit 18 or the internal nonvolatile memory 17 is acquired, and points existing in a predetermined region (for example, a radius of 2 km) from the acquired vehicle position information. Data is extracted and the extracted point data is transmitted. Further, the number of point data to be transmitted at a time can be arbitrarily set, and may be one or a plurality of predetermined numbers. In this embodiment, the number is one. This shortens the radio band usage time occupied by one target detection device 10 to transmit point data, and increases the number of units (target detection devices) that exist in the vicinity and participate in communication. Can do. A larger number of participating units is preferable because the network can be expanded and information can be collected in various ways, and the reliability of the information is improved.

In addition, when one point data is transmitted in one transmission process, when there are a plurality of point data in an area within 2 km, the control unit 18 compares the “registration date” of each point data. Then, the “registration date” is transmitted in rotation from the newest point data. This is because there is a high possibility that the point data with the old registration date has already been transmitted and distributed (registered) to other target detection devices. Data can be efficiently transmitted and received in time. In other words, even if it is not possible to transmit all corresponding point data, it is possible to preferentially transmit point data that is highly likely to be unregistered with other target detection devices, and each target detection device New point data can be efficiently acquired and stored. In addition, new data on the registration date is likely to be more useful information, such as a vehicle speed measurement device that is currently performing speed measurement processing. It is preferable to transmit from.

If transmission of all corresponding point data is completed, the transmission may be performed again from the beginning, or the area to be transmitted is expanded (an area outside 2 km from the current position, 2 to 5 km from the current position). Etc.) Point data belonging to the expanded area may be transmitted. Furthermore, if there is no point data existing in the above-mentioned area within 2 km, the transmission processing may be omitted, the area may be expanded and the corresponding point data may be extracted again, or all points Data may be transmitted. In this case, there are often a plurality of point data. However, as described above, the priority of the point data to be transmitted is various, such as the order of registration date or the order close to the current position. Can be used. In this embodiment, the corresponding point data is repeatedly transmitted without expanding the area within 2 km.

Further, the point data may be transmitted alone or may be transmitted together with the vehicle position information. In the present embodiment, it is transmitted together with the own vehicle position information. That is, the timing for transmitting the point data toward the periphery is periodically transmitted at regular intervals in the same manner as the vehicle position information. Of course, when own vehicle position information from another target object detection apparatus is received, the process of transmitting the point data held by the user immediately may be started using the received information.

In this embodiment, the point data is transmitted during a period in which other target object detection devices exist. Specifically, the control unit 18 stops the transmission of point data when the vehicle position information from another target detection device cannot be received for a certain time (for example, one minute). In the present embodiment, the point data and the vehicle position information are transmitted in pairs, so if the vehicle position information from another target detection device cannot be received for a certain period of time as described above. Repeat the transmission of only the vehicle position information.

FIG. 2 shows an example of an algorithm for realizing the transmission function having the above-described point data transmission function and the vehicle position information transmission function. In this example, the point data is transmitted in pairs with the vehicle position information. If the vehicle position information is transmitted at a predetermined timing (S1), the first timer (incorporated with the control unit 18) for recognizing the transmission cycle is restarted (S2). And it waits until the own vehicle position information sent from another target object detection apparatus is received (S3, S4). If it is not received even when the first timer expires (5 seconds elapses), the process returns to the processing step S1 to transmit its own vehicle position information. Actually, the control unit 18 passes the vehicle position information together with the transmission request to the wireless transmission / reception unit 13, and the wireless transmission / reception unit 13 performs wireless transmission.

  On the other hand, if the vehicle position information from another target detection device is received (Yes in S3), the control unit 18 starts the second timer and accesses the internal nonvolatile memory 17 to determine the current position. It is determined whether or not point data exists in the vicinity (for example, within 2 km) (S6). If it exists, the point data to be transmitted is read out (S7). That is, when the point data to be transmitted at one time is 1, and there are a plurality of peripheral point data, reading is performed one by one in order from the newest registration date. The item of point data read here is at least a unit ID and position information.

  Next, it waits for the transmission timing of the vehicle position information (the first timer is up), and transmits the vehicle position information and the read point data as a pair (S8). On the other hand, when there is no point data in the vicinity of the current position (No in S6), it waits for the transmission timing of the vehicle position information (the first timer is up) and transmits only the vehicle position information (S8).

After executing these processing steps S8 / S9, it waits to receive own vehicle position information (sometimes with point data added) of another target detection device (S10, S11). If received (Yes in S10), the process returns to process step S5 to restart the second timer and execute transmission processing of point data and the like after S6. If the second timer times out (for example, 1 minute has elapsed), it can be determined that there are no other target detection devices in the surrounding area, and the process returns to the processing step S1 and only the normal own vehicle position information is obtained. Return to send.

* Point Data Reception Function When the control unit 18 receives point data sent from another target detection device, it registers it in the point data storage area of the internal nonvolatile memory 17. At this time, it is easily predicted that point data based on the same generation factor (microwave transmission source) will be notified from a plurality of different target detection devices, and point data that has already been automatically or manually registered by itself. It is also expected to receive point data for the same target (microwave transmission source) as the point data registered based on reception from other target detection devices. At this time, the latitude / longitude information of each point data is hardly the same, and it is expected that there are many slightly different positions.

Therefore, in the present embodiment, the point data reception function for performing the processing shown in FIG. That is, it waits for reception of point data from another target detection apparatus (S15). When the point data is received, the control unit 18 searches for existing point data registered in the internal nonvolatile memory 17 using the latitude / longitude information of the received point data as a key, and searches for the same target data. It is determined whether or not point data estimated to be an object (occurrence factor) exists (S16). As conditions for estimating the same target, all points within a radius of 500 m centering on the latitude / longitude information of the already registered point data are regarded as the same. Accordingly, the distance between the position specified by the latitude / longitude information of the received point data and the registered position is calculated, and if the calculated value is 500 m or less, they are the same, that is, the branch determination in S16 is Yes. And In this embodiment, the condition to be regarded as the same in the branch determination in the processing step S16 is within a radius of 500 m. However, the numerical value can be arbitrarily changed.

  If there is a registered one (S16 = Yes), the point data received this time is not registered, so the process returns to the processing step S15 to wait for reception of the next point data. Although registration processing as new point data is not performed, it is preferable to perform reliability update processing as described later. When there is no registered point data (S16 = No), the control unit 18 registers the point data received this time in the internal nonvolatile memory 17 (S17). At this time, when the reliability is included as the transmission item of the point data, the received reliability is registered, and when the reliability is not included, the reference value = 1 is set as the reliability. .

In this way, by not registering point data that is regarded as the same, points are added more than necessary, alarms occur frequently, and the number of points displayed on the display section increases as a dark cloud. It can be prevented from becoming difficult.

Further, in this embodiment, when it is considered that they are the same, the received point data is discarded without being registered. For example, the position information is added and stored in association with the already registered point data. You may do it. As a result, there are a plurality of pieces of position information about one target to be detected. At the time of alarm, an alarm is issued when the position of the point data and the current position of the vehicle are in a predetermined positional relationship. The position of the point data at this time is determined from a plurality of position information registered in the point data. The determined representative position can be used. This representative position is calculated geometrically by, for example, obtaining the center of gravity and center position of a plurality of pieces of position information and using the position as the representative position or obtaining the representative position from the position bias. Can do.

Further, in the present embodiment, the position information of the point data is registered, and the alarm is performed when the position information is located within a predetermined distance (area) centering on the position information. That is, the warning area is set within a predetermined radius. However, the present invention is not limited to this, and the warning area is defined by an ellipse, rectangle, or other predetermined geometric expression format, and a warning is issued when the vehicle is in the warning area. good.

* Point display function As described above, the control unit 18 performs automatic / manual registration on its own, and the position information of the point data stored and stored in the internal nonvolatile memory 17 based on the notification from another target detection device. When the vehicle position information is in a predetermined positional relationship, an alarm is issued. As the mode of the alarm, an auditory notification such as sound (sound) using the speaker 16 and the display unit 15 are used. There is visual notification.

That is, an example of a display mode using the display unit 15 is shown in FIG. This display area is mainly for showing the positional relationship between the target (target) and the vehicle, and can display a plurality of targets. Both the vehicle and the target are indicated by icons (marks). The own vehicle is indicated by an own vehicle progress icon In formed in a shape in which an arrow is added in a circle. A target (target) existing within a circle having a predetermined radius (switchable) centered on the own vehicle progress icon A is displayed as a target icon Tn at the position where the target exists.

The target icon Tn is indicated by a predetermined shape such as a round shape, a square shape, or a star shape. Moreover, it is good to change a color and a magnitude | size according to the kind of target object. Make important ones larger or display them in prominent colors such as red. Further, the target icon Tn includes an alarm target icon indicating a target that is an alarm target and a non-alarm target icon indicating a target that is not an alarm target because of the positional relationship with the host vehicle. Here, the alarm target is a target that is in front of the traveling direction of the host vehicle (± 90 ° from the traveling direction) and has a warning angle such as a speed measuring device that emits microwaves. The condition within the angle (target alarm angle ± 40 °) is provided. In the case of an icon that is not subject to alarm, the shape is made into a small circle or the display color is made gray.

The display screen in the display area is displayed with the traveling direction of the host vehicle viewed upward. This is based on the position information of the own vehicle given from the GPS receiver 12, the control unit 18 obtains the traveling direction of the own vehicle, obtains the position of each target with the traveling direction facing upward, This can be dealt with by displaying what exists in the display area at the corresponding position.

In the illustrated example, the entire circle centered on the own vehicle progress icon I0 is displayed in the display area of the display unit 15. However, for example, the own vehicle progress icon I0 is positioned on the screen on the lower side. Alternatively, only a part of the circle may be displayed by enlarging the radius.

Then, the points registered as the point data described above are added to one of the target icons. That is, the control unit 18 acquires the vehicle position information and the position information of the point data, and if the point data exists within a circle area within a predetermined radius centered on the vehicle position, the control unit 18 sets the corresponding position. Displays the target icon corresponding to the point data.

* Other vehicle position display function As described above, in the present embodiment, each target detection device periodically transmits its own vehicle position information, and the own vehicle position transmitted from the other target detection device. By receiving the information, it is recognized that another target detection device exists in the vicinity.

Therefore, the control unit 18 added another target detection device as one of the items (elements) to be displayed on the display unit 15. Thereby, as a display mode of the display unit 15, when a target existing around the host vehicle is displayed as a mark, and another target detection device exists in the display area, A target icon (mark) indicating “a vehicle equipped with a target detection device” is displayed at the corresponding position.

By doing in this way, the mark which shows the own vehicle and another vehicle is displayed on the same display screen, respectively, and it can confirm a mutual positional relationship on a display screen. As a result, it can be felt that the present system is operating normally. In addition, when a target icon indicating a point is displayed in a state where a mark indicating another vehicle is displayed, it means that no point data is registered in any of the own vehicle and the other vehicle. In addition, it can be seen that there is a high probability that there is no cause for registering point data.

  Next, each function will be described with specific examples. As shown in FIG. 5, the own vehicle on which the unit A (ID = A) as the target detection device is mounted and the other vehicle on which the unit B (ID = B) as another target detection device is mounted. It is assumed that the vehicle travels along a predetermined trajectory and approaches gradually. As shown in FIG. 6, the current vehicle position information is also updated as the vehicle equipped with the target detection device of ID = A changes as the vehicle travels, so that the vehicle position information is updated regularly (at intervals of 5 seconds). The vehicle position information is transmitted. When there is no other target detection device in the surrounding area, since the vehicle position information from the other target detection device is not received, the control unit 18 updates the vehicle position information stored in the memory, and The process of transmitting the updated vehicle position information is periodically repeated.

  On the other hand, as shown in FIG. 7, when the target detection device with ID = A and the target detection device with ID = B come close to each other and become less than a certain distance, the target detection device with ID = B The target object detection device with ID = A can receive the transmitted vehicle position information. Then, based on the received vehicle position information of ID = B, the control unit 18 displays a target icon (symbol B in FIG. 7) corresponding to the target detection device of ID = B.

Further, when the control unit 18 recognizes the presence of the receiving device from the own vehicle position information of another target detection device (ID = B), the control unit 18 accesses the internal nonvolatile memory 17 and based on the own vehicle position information stored by itself. If there is a point ("Point X" in the example in the figure) that is held within 2 km from the current position, that point is extracted and, as shown in FIG. Point data about the point X is transmitted in pair with the vehicle position information.

  Although not shown in the drawing, the target detection apparatus with ID = B determines whether it is a new one or a registered one when receiving the transmitted data of the point X, and if it is new, the target non-volatile Register in the memory. When the point X data of the point X is not registered, the target detection apparatus with ID = B newly registers the point data for the point X in the internal nonvolatile memory, and the current position information and the position information of the point X are predetermined. When the relationship becomes, an alarm based on position information can be issued. That is, for the target detection apparatus with ID = B, the point X can be given an alarm based on position information in advance without receiving a microwave.

In addition, since the target detection apparatus with ID = A changes within 2 km as it moves, the points belonging to that range also change, so that the transmission contents of the points change with movement. When there are a plurality of points, for example, the plurality of point data are stored in a temporary memory such as a buffer, and a transmission completion flag is associated with one of the newest registration dates as described above. Send them one by one, and if they are sent, set a sent flag. Then, at the next transmission, the one with the latest registration date is selected and transmitted from the ones for which the transmitted flag is not set. At this time, when the range within 2 km is changed and, accordingly, point data to be added / deleted is generated in the temporary memory, the addition / deletion update processing is performed.

  Once the control unit 18 receives the vehicle position information of another target detection device and starts transmitting the point data held by itself, the control unit 18 temporarily stores the vehicle position information of the other target detection device. Even if it becomes impossible to receive the point data, the transmission of the point data is continued. This is because there is a possibility that the vehicle position information of the other target detection device cannot be received even if there is another target detection device in the vicinity, such as a communication error or inability to communicate in a busy state. Then, when the vehicle position information cannot be received continuously for a certain time (for example, 1 minute), it is determined that the other target object detection device has been separated, and the control unit 18 determines only the vehicle position information. Switch to transmission (end point data transmission). Accordingly, the target icon indicating the target detection device with ID = B is erased (not displayed) from the display area of the display unit 15.

* Point data reliability update function As described above, at least in the case of automatic / manual registration of point data, the reliability is set to the reference value = 1 as the initial value. In this way, point data that is regarded as the same point as the already-applied point data may be transmitted from one or more other target detection devices. When point data is received from different target detection devices for the same point, it can be said that the reliability of the point data is high.

Therefore, it is preferable to add a reliability update function as shown in FIG. The flowchart shown in FIG. 9 is based on the reception function of FIG. 3 and adds processing steps S18 and S19. The processing steps S18 and S19 may be regarded as a reliability update function, and the flowchart shown in FIG. 9 may be regarded as a reception function with a reliability update function.

  Specifically, it waits for the reception of point data (S15), and determines whether or not the point data estimated to be the same target (occurrence factor) as the received point data has already been registered (S16). . If it is registered (S16 = Yes), the control unit 18 determines whether the point data is from a new target detection device (S18). If it is new, it is stored in the point data regarded as the same. The incremented reliability is incremented by 1, and the position information or unit ID included in the received point data is added as additional information (S19). Whether or not the data is point data from a new target detection apparatus can be determined using additional information. That is, when the unit ID is registered as additional information, it can be determined that the unit ID of the current point data is new when it is not registered as additional information. Further, when position information is registered as additional information, it can be determined that the position information is new if the same position information is not registered. This is because there is a low possibility that the position information registered by different target object detection devices is exactly the same.

When there is no registered point data (S16 = No), the control unit 18 registers the point data received this time in the internal nonvolatile memory 17 (S17). At this time, when the reliability is included as the transmission item of the point data, the received reliability is registered, and when the reliability is not included, the reference value = 1 is set as the reliability. .

As described above, the reason for No in S16 is that neither automatic registration nor manual registration is performed (point data is not registered in the target object detection device itself), and point data is notified from another target object detection device. Is the case. Then, the point data registered in accordance with the notification from the other target object detection apparatus in this way is also registered point data to be compared in the branch determination in the processing step S16 after being registered. Therefore, after this registration, when point data that seems to be the same target is newly received from another target detection device, the branch determination in processing step S16 is Yes, and the branch determination in S18 is newly received. It is determined whether or not the target object detection device that registered the point data is different from the target object detection device that registered the already registered point data first. When this determination is Yes, the point data registered in different other target detection devices for the same target (point) will be received, as compared to the case of receiving from only one target detection device. It can be said that the reliability is high, and the reliability is increased.

That is, the point data registered by automatic registration or manual registration and the received point data registered by another target object detection device are point data for the same target or from a plurality of different target object detection devices. If the received point data is for the same target (creating source is different), there is a high possibility that the target corresponding to the point data is the detection target. The reliability was increased each time.

FIG. 10 shows a reliability update function in the case where point data is registered first by reception from another target detection apparatus, and then self / manual registration is attempted by itself. When the control unit 18 detects a microwave having a predetermined condition (Yes in S21), the control unit 18 tries to register the point data. At this time, the control unit 18 determines whether it is already registered as the point data ( S22). As in the case of the various functions described above, this determination is made by comparing the position registered as point data with the current position, and if both are within a certain distance, it is determined that they are the same target. Judge as registered. If it is registered, the control unit 18 checks the unit ID stored in the point data and determines whether or not it is its own unit ID (S23). When registration is performed upon reception from another target detection device (No in S23), since the unit ID stores an ID other than itself, the self can be determined as the first point detection, so the reliability is updated. (+1 increment). On the other hand, in the case of the own unit ID (Yes in S23), the reliability registered in the past is not updated. If the branch determination in S22 is No, it is new point data, so registration processing is performed (S25).

Furthermore, as another reliability update function, reliability information is added to the point data, and the target object detection device on the transmitting side transmits the “self” unit ID and point data to detect the target object on the receiving side. In the apparatus, point data regarding a point that can be regarded as the same point that identifies the alarm target corresponding to the received position information has already been registered in the point data storage unit, and the unit ID of the point received this time and the storage in the storage unit If the unit ID is different, the reliability may be increased.

That is, when position information of points that can be regarded as the same from a plurality of target object detection devices is received, the reliability is higher than when notification is received from only one target object detection device. However, the greater the number, the higher the reliability. Therefore, each time point data of points that can be regarded as the same from different unit IDs is received, the reliability may be increased (incremented by +1). Of course, the same point data may be received multiple times from the same target detection device, but in that case, if the unit ID associated with the point data received in the past can be recognized as the same, The increase (update process) of the point data with the reception of the current point data is not performed.

In addition, the point data received from other target detection devices is not necessarily registered automatically or manually by the target detection device of the transmission source, but is also sent from another target detection device. There may be point data received and registered, or point data transmitted by itself in the past. Therefore, as described above, if the reliability is simply determined based only on the difference between the unit IDs of the transmission sources, all the target object detection devices (creating sources) registered first may be the same. In such a case, even point data received from a plurality of target object detection devices can be determined to be less reliable than when all the creation sources are different. Therefore, even when the unit IDs are different, in the case of exactly the same latitude / longitude, it is preferable to presume that the creation source is the same and not perform the update process to increase the reliability. At this time, it is more preferable that the registration date information is further taken into consideration, and that the creation source is assumed to be the same and the update process is not performed when the latitude, longitude and registration date are exactly the same. This is because even if the point data is registered with different target detection devices, there is still a possibility that the latitude and longitude will coincide. Of course, in order to perform the reliability update process with a simple process, as described above, a determination may be made based on the unit ID of the transmission source (not using latitude / longitude).

By using these reliability update functions, for example, as shown in FIG. 11 (a), when the point X has already been registered as point data, the point Y (FIG. 11 (b) )), Since Y is not within the 500 m range of X, it is recognized as another and added as point data and displayed as a target icon Tn. On the other hand, as shown in FIG. 11 (c), assuming that point Z is received from another target detection device, Z is within the 500 m range of X, so it is determined that it is the same, and based on Z Although the point data is not registered, the reliability of the point data for X, which was originally registered, is increased.

* Point data life management function Considering the use of point data received from other target detection devices, such point data is often used for temporary speed measurement using a mobile speed measurement device. It can be said that the possibility of measuring speed in the same place on other days is not so high. Locations that regularly perform measurements using a mobile speed measurement device are well known to some extent, and can be dealt with by separately registering them as basic data in advance.

  On the other hand, if you happen to measure the speed at a certain position and there are many points data registered at that time, the number of registered point data will increase, and alarms based on the point data will occur frequently, In addition, if there are many alarms that are not actually related (there are no targets to be detected), attention may be distracted and undesirable results may occur.

Therefore, in the present embodiment, the control unit 18 compares the registration date, which is one of the point data parameters, with the current date and time (obtainable from the GPS signal), and the point data has a lifetime as shown below. And change the content of the alarm.
Date when the current date and time was registered: Within 2 weeks after registration as a point of the current day: Within 1 month after registration as a recent point: Within 2 months after registration as a point within the past month: Past Alarm as a point within 2 months Within 3 months since registration: Alarm as a point within the past 3 months 3 months after registration: No alarm

  The alarm can be notified by voice, and when it is output to the display unit, it can take various forms such as being output as a message or displayed with a different color or size.

* Additional information addition function for existing targets In the internal non-volatile memory 17, a region where speed measurement is performed regularly and frequently using a mobile speed measurement device based on sighting information etc. is registered, and the control unit 18 may be provided with a function to issue a predetermined alarm when approaching the area. When such a function is provided, when a request for adding new point data is generated in response to a notification from itself or others, the point data corresponds to the above-mentioned region from the position information of the point data. If it can be recognized, the detection result is added to the area as additional information. When this detection result is added, it is possible to give a warning with a more reliable response (additional information is also added by voice for notification, etc.). As a result, it is possible to provide an alarm that takes reliability into account without additionally registering point data.

* Point alarm function In the case of point data, it is difficult to add direction information (microwave emission direction, etc.). Therefore, the alarm range was expanded more than usual. For example, as shown in FIG. 12, a 1 km alarm is given if the vehicle has entered (approaching the center position) within an area of 1100 m centering on the position of the point data, and an alarm of 500 m is issued if the vehicle entered a 600 m area. Then, once the vehicle has entered the 500 m range (approaching the center position), then, when the vehicle has left the 1100 m range, the separation notice is performed.

* Communication Specifications By the way, the target object detection device 10 periodically transmits its own vehicle position information (some of which have point data). Therefore, if the transmission intervals of the target object detection devices 10 are set to exactly the same value (5 seconds), as shown in FIG. 13A, a plurality (two in the figure) of target object detection devices are almost at the same timing. When carrier sense is started, the vehicle position information is not transmitted from other target detection devices at that time, so there is no carrier, reception processing is not performed, and processing for starting transmission at the same time may be repeated endlessly There is. Then, since transmission is performed at the same time, there is a problem that data transmission / reception between the target object detection devices 10 is not established.

Therefore, the transmission interval (transmission cycle) of each target object detection device 10 is diffused with random numbers within a certain range with reference to a reference value (for example, 5 seconds). Thereby, it is suppressed that the transmission cycle of each target object detection apparatus 10 becomes the same endlessly. As shown in FIG. 13B, even if the timing of carrier sense & transmission coincides at a certain point in time, At another time, the carrier sense timing is shifted, and the vehicle position information transmitted from the other target detection device can be received.

Further, the wireless transmission / reception unit 13 always performs a reception operation for frame synchronization search except during transmission. Then, the control unit 18 sends a transmission request to the wireless transmission / reception unit 13 when the transmission cycle is reached. Upon receiving the transmission request, the wireless transmission / reception unit 13 determines whether transmission is currently possible (no carrier). If transmission is possible without a carrier, the wireless transmission / reception unit 13 receives the transmission request, performs transmission processing, In this case, the transmission request is rejected because it cannot be transmitted. When there are a plurality (a large number) of target detection devices in the vicinity, transmission is started all at once when there is no carrier, which may cause a communication error. Therefore, preferably, each target detection device is set to a different waiting time (offset) from the end of reception to the next transmission start time so that transmission is performed from any one of the target detection devices. Good. As a method of making this offset different, there is a method of changing using a random number or the like every time. In this way, it is possible to suppress the possibility that the offsets of a plurality of target object detection devices existing in the vicinity match each time. In addition, grouping is performed using the last digit or two digits of the serial number, and a different offset is set for each group. Even if it does in this way, possibility that the several target detection apparatus which exists in the periphery will belong to the same group becomes low.

10, 10 'target detection device 11 microwave receiving unit 12 GPS receiving unit (position detecting unit)
13 Wireless transceiver (wireless receiver)
14 Input unit 15 Display unit 16 Speaker 17 Internal nonvolatile memory (database, point data storage unit)
18 Control unit 19 SD slot 20 SD memory card

Claims (10)

Memorize the position information of the target,
When the current position information of the host vehicle and the position information of the target are in a set positional relationship, an electronic device that issues an alarm,
A point data storage unit for storing a plurality of point data including position information of points for identifying alarm targets collected by the self;
Transmission control means for transmitting position information of at least the points included in the point data stored in the point data storage unit to other electronic devices existing around the host vehicle,
With
In the point data, information about the time when the point is registered is added,
The transmission control means has a function of preferentially sending information about the point in time when the point is registered when sending the point data.
Electronic equipment characterized by The electronic device according to claim 1, wherein the transmission control unit is configured to exclude a transmission target when a point in time indicated by information about a point in time when the point is registered is older than a set reference. . 3. The electronic device according to claim 1, wherein the transmission control unit transmits the position information of the point in response to receiving a notification request signal wirelessly transmitted from the other electronic device. . The electronic device according to claim 3 , wherein the transmission control unit has a function of stopping transmission of the point data when the notification request signal cannot be received for a certain period. The transmission control unit extracts the point data existing around the current position, the electronic device of any crab according to claims 1 4, characterized by the extracted point data transmission target.   Information for identifying the factor that registered the point is added to the point data,
  Control the registration of the point data based on the information
  The electronic device according to claim 1, wherein Equipped with an automatic registration function that automatically registers the point data upon reception of radio waves that match the set conditions,
The position information of the point that identifies the alarm target collected by the self stored in the point data is the current position detected by the position detection unit when receiving a radio wave that matches a set condition,
The position information of the point is compared with the stored position information of the target, and when the distance is shorter than a set distance, the point data is not registered for the point by the automatic registration function. The electronic device according to claim 1 , wherein the electronic device is an electronic device.   8. A function of issuing an alarm when the current position information of the host vehicle and the position information stored in the point data storage unit are in a set positional relationship. The electronic device in any one. Receive the location information of the point that identifies the alarm target sent from other electronic devices,
Memorize the position information of the point that identifies the received alarm target;
The present invention has a function of issuing an alarm when the current position information of the own vehicle and the stored position information of the point that specifies the received alarm target are in a set positional relationship. The electronic device according to any one of 1 to 8. The program for making a computer implement | achieve the function of the electronic device in any one of Claim 1-9.

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