JP6954697B2 - Equipment and programs - Google Patents

Description

The present invention relates to a target object detection device and a program that detects a target object and gives an alarm based on position information.

A target detection device that detects and notifies microwaves transmitted from a vehicle speed measuring device is known. This target detection device recognizes that it receives microwaves from the vehicle speed measuring device even when it receives microwaves transmitted from a malfunction source such as an automatic door of a convenience store that uses the same frequency as the speed measuring device. There is a problem that an unnecessary alarm is issued. In view of these circumstances, recent target detection devices store the position information of the malfunction source, recognize the position of the own vehicle by GPS, and detect the microwave when the vehicle is located at the malfunction source. By controlling so that it does not issue an alarm, it prevents unnecessary alarms from being issued.

Further, the device for measuring the speed of the vehicle is not limited to the device using the above-mentioned microwave, and for example, a vehicle traveling on the road is detected by two loop coils embedded and installed under the road, and the second Some vehicle measurements are based on the time difference between the detection signals output from one loop coil. Since the vehicle speed measuring device of this type does not output microwaves, it cannot be detected by the target detection device using the above-mentioned microwave detection.

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

In the target object detection device based on this type of position information, the freshness and accuracy of the position information of the detection target stored in the storage unit are important factors. That is, when the stored position information is based on the 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 Even though it exists, the location is not registered in the storage means and the alarm is not issued, which reduces the reliability of the alarm.
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 purchase of the target detection device. Such update processing includes updating using an external non-volatile memory such as an SD card, downloading the latest location information data from a server online, and storing it in the storage unit of the target detection device. Is done by. Further, as disclosed in Patent Document 1, there is also a technique of storing and holding the position information of the detection target object determined based on the received position in the storage unit when the radio wave of the detection target is received.

Japanese Unexamined Patent Publication No. 9-27096

If the latest location information is updated 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 complicated. Also, if you forget to update, the old location information may remain.

The latter technique disclosed in Patent Document 1 solves the above problem because it is automatically registered, but in any case, it is necessary to receive the radio wave emitted from the detection target for the first time. Therefore, in the first reception, the existence 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, it is possible to give an alarm based on the position information from the first time, and to provide information for that purpose. It is an object of the present invention to provide a target detection device capable of performing.

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

The database corresponds to the "internal non-volatile memory 17" in the embodiment. The point data storage unit corresponds to the "internal non-volatile memory 17" in the embodiment. “Self-collected” means collected by automatic registration as in the inventions of (8) and (9), collected by manual registration as in the inventions of (10) and (11), and (12). Various methods can be taken, such as acquiring and collecting what is registered by another target detection device as in the invention of.

The transmission control means transmits the position information of the point (wireless transmission) at an arbitrary timing. Then, when another target detection device capable of receiving the transmitted position information exists around the target detection device of the present invention, the other target detection device captures the received position information, thereafter. , An alarm can be issued based on the position information for the alarm target (target) corresponding to the position information. That is, the "other target target detection device" can give an alarm based on the position information from the first time even if it is a new target. Then, the target object detection device of the present invention can provide effective information to the other target object detection device. Further, although it is the timing to transmit the position information, it may be transmitted regularly or irregularly, but as in the invention of (2) below, when another target detection device exists in the surroundings. Good to send.

(2) The transmission control means is provided with a function of transmitting at least the position information of the point included in the point data in connection with receiving the 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 own vehicle position information, another target detection device that has received the own vehicle position information can recognize the positions of both, and for example, display both on the display device. I made it possible to visually confirm that it actually exists (the system is operating), but if such a function is not provided, it is simply predetermined without notifying the location information. A notification request signal such as a command may be used. When the target detection device receives the notification request signal, it can confirm that there is another target detection device around itself that can use the information of the point data stored by itself. If the location information is transmitted at that time, communication can be performed efficiently (transmission is not wasted). As for the timing and number of times to transmit the position information of the point, the notification request signal may be sent only once or N times after being received, or may be sent at predetermined intervals for a certain period of time after being received, or may be received. It may be transmitted regularly or irregularly (until it cannot be received).

(3) On the premise of the invention of (2), the transmission control means is provided with 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 reception is not possible for a certain period of time, it can be determined that the other target detection devices have separated. Further, even if the user is nearby, it can be estimated that the communication cannot be performed (the other party cannot receive the transmitted position information), so that unnecessary transmission processing can be avoided. Even if there are other target detection devices in the vicinity, the communication line may not be able to receive the notification request signal several times due to busy conditions, etc., so instead of stopping the transmission immediately after it becomes unreceivable. , As in the present invention, it is preferable to transmit for a certain period of time.

(4) The transmission control means may extract point data existing around the current position and use the extracted point data as a transmission target. The point data to be transmitted may be all owned by the user, but when the number of possessed points increases, it takes time to transmit the position information of all the point data, and the information necessary for other target detection devices is obtained. It may not be possible to send. Therefore, by targeting the point data existing around the current position as the transmission target, the information currently required for other target detection devices can be efficiently transmitted.

(5) On the premise of the invention of (4), when there are a plurality of point data to be transmitted, one point data is to be transmitted in one transmission process, and each point data is selected as a transmission target one by one. It is good to set it to. By making one transmission target, it is possible to shorten the time for occupying the communication channel in one transmission process. As a result, even when a plurality of (many) target detection devices are present in the surroundings, each target detection device can communicate with each other, and information can be effectively acquired.

(6) The registration date in which the point is registered is added to the point data, and when transmitting a part of the point data, the transmission control means gives priority to the latest registration date. It is good to target. If the registration date is old, there is a high possibility that the target detection device of the other party has already been sent as point data (if the registration date is new, it is highly likely that the other party does not have it), and for example. , If the registration date is today, there is a possibility that speed measurement is currently being performed if the detection target is a speed measuring device, and more important and urgent information can be efficiently transmitted.

(7) It is preferable to add the registration date in which the point is registered to the point data, and exclude it from the transmission target when the registration date is older than the set standard. As explained in (6), there is a possibility that the old data has already been distributed, and there is also a possibility that there is no alarm target at the position of the point and it is not necessary to notify. Therefore, by not transmitting the information with the old registration date, it is possible to reduce the load generated by the transmission process. Not transmitting means that the data may be left as data and only the transmission process may be performed, or the data itself may be deleted so that it cannot be physically transmitted.

(8) It has an automatic registration function that automatically registers the point data when a microwave that matches the set conditions is received, and the position of the point that is stored in the point data and specifies the alarm target collected by the self. The information may be the current position detected by the position detection unit when the microwave that matches the set conditions is received.

(9) The position information of the point is compared with the position information of the target object stored in the database, and if the distance is shorter than the set distance, the point data for that point is registered by the automatic registration function. You should avoid it. If the "distance" is short, it can be estimated that the point to be registered and the target stored in the database are the same. In addition, it is possible to suppress the occurrence of unnecessary transmission and the like accompanying it.

(10) On the premise of the invention of (9), it is provided with a manual registration function for registering the point data according to a registration instruction from the user, and is stored in the point data. The information may be the current position detected by the position detection unit when the registration instruction is given. In this way, the detection target that does not emit microwaves or the detection target that emits microwaves is being prepared (installed) and the microwave is not actually transmitted, but there is a risk that it will be transmitted afterwards. Even expensive ones can be registered and provided with information. Registration instructions include, for example, instructions using set switch operations, voice input, and the like.

(11) The registration instruction is provided for the position information of the point that identifies the alarm target collected by the self, which is provided with a manual registration function for registering the point data in accordance with the registration instruction from the user. As the current position detected by the position detection unit, the alarm mode based on the position information registered by using the automatic registration function and the alarm mode based on the position information registered by using the manual registration function are defined. 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 equal to or greater than the threshold value within the reference period, the transmission control means has at least the manual registration function. It is advisable to suppress the transmission of the point data registered using. In the embodiment, the reference period is in units of one day, but may be hours or a plurality of days. You can operate the manual registration function unnecessarily and suppress sending unnecessary information to the surroundings. The target data for which transmission is suppressed may be all (including automatically registered data). Further, if the above conditions are met, the registration process itself may be invalidated (not performed).

(13) The point data may be acquired by another target detection device and stored in its own point data storage unit. (14) The point data may be associated with a unit ID that identifies the target detection device in which the point is first registered. (15) It is preferable to provide 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 of 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. The alarm mode may be different. The alarm mode by the second alarm control means may be different. This experience value is different from the reliability (reliability), and 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 by the user's intention, it is also possible to prevent transmission by the user setting as described above. However, it is advantageous for the user as a whole to exchange as much location information as possible. Therefore, for example, the more information is provided, the higher the experience value becomes, and the alarm mode evolves so that the number of users who transmit the information increases. According to the present invention, it is possible to provide an environment in which a user is willing to transmit location information.

(17) A wireless receiver that receives position information of a point that identifies an alarm target sent from another target detection device, and point data that includes the position information received by the wireless receiver are stored in the point data storage unit. A second that issues an alarm when the point data registration means to be registered, the position information detected by the position detection unit, and the position information of the point registered in the point data storage unit have a set positional relationship. It is preferable to provide 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 detector provides information about the points it has collected to the other target detectors and acquires information about the points collected by the other target detectors. In this way, information about points can be shared, so data can be collected efficiently.

(18) A position detection unit that detects the position of the own vehicle, a database that stores the position information of the target object, the position information detected by the position detection unit, and the position information of the target object stored in the database. An alarm control means that issues an alarm when is in a set positional relationship, a wireless receiver that receives position information of a point that identifies an alarm target sent from another target detection device, and its wireless reception. The point data registration means for registering the point data including the position information received by the unit in the point data storage unit, the position information detected by the position detection unit, and the position information of the point registered in the point data storage unit. A second alarm control means for issuing an alarm when the above is in the set positional relationship may be provided.

According to the present invention, position information about a point collected by another target detection device can be acquired, and an alarm based on the position information can be issued based on the position information. Therefore, even if the target is a new target, the position can be determined from the first time. You will be able to give an alarm based on the information.

(19) Point data for points that can be regarded as the same as the point that identifies the alarm target corresponding to the received position information by adding reliability information that identifies the certainty of the point as an alarm target to the point data. Is already registered in the point data storage unit, and if the target detection device that first registered the registered point data and the target detection device that first registered the point received this time are different, the point It is preferable to have a reliability update function that controls to increase the reliability information of data. When the same point is registered as point data by a plurality of different target detection devices, the reliability of the point data becomes high. Therefore, when issuing an alarm by the second alarm control means, if the mode of the alarm is changed according to the reliability information (the higher the reliability, the more important the alarm is to pay attention to the driver, or By notifying the driver together with the reliability, it is possible to provide the driver with information for judging the accuracy of the warning based on the point data), and an effective warning can be performed.

Whether or not the point data is for the same point can be determined to be the same, for example, when the position information is close (within the set value). Then, it is possible to determine whether the target detection devices detected / registered at that point are the same or different, for example, according to the inventions shown in (21) and (22) below.

(20) Further, reliability information for identifying the certainty of the point as an alarm target is added to the point data, and the target detection device on the transmitting side transmits the "self" unit ID and the point data. , The target detection device on the receiving side has already registered the point data for the point that can be regarded as the same as the point that identifies the alarm target corresponding to the received position information in the point data storage unit, and the unit of the point received this time. When the ID and the unit ID stored in the storage unit are different, a reliability update function for controlling to increase the reliability 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, both are first registered by different target detection devices. It is possible to determine that this is the point and update the reliability information.

(22) The unit ID of the target target detection device registered first is added to the point data, and the unit ID is associated with the position information of the point sent from the other target detection device. The reliability update function compares the received unit ID with the unit ID of the point data stored in the point data storage unit to determine whether or not the unit ID is registered by a different target detection device. You may.

(23) When the received position information is within a set distance 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. You should not do it. If such conditions are met, there is a high possibility that the points will be the same, and registering multiple point data based on the same point will not only lead to wasteful specifications of memory capacity, but will also cause frequent alarms, which is not preferable. can be solved. Further, even if it is actually a different point, an alarm is issued in the vicinity thereof, so that there is not much problem in practical use.

(24) The other target detection device is the target detection device specified in (17), and if the position of the own vehicle sent from the other target detection device is received, the reception is received. It is preferable to provide a display control means for displaying the positions of the self and other target detection devices on the display unit based on the position of the own vehicle and the position information of the self detected by the position detection unit. By doing so, the positions of the self and other target detection devices are displayed on the display unit, so that the user who sees them can confirm that the system is operating normally and other devices. If the target detection device is displayed but no point-based alarm is given, it can be confirmed that there is a higher probability that there is no alarm target in the surrounding area.

In the present invention, a position detection unit (GPS receiving unit 12) that detects the position of the own vehicle and a point data storage unit (internal non-volatile) that stores point data including position information of points that identify the alarm target collected by the self. When the position information of the point that identifies the alarm target sent from the memory 17) and the other target detection device is received, the control means (control unit) that registers the point data including the received position information in the point data storage unit. 18), the control means issues an alarm when the current position and the position information of the point registered in the point data storage unit have a set positional relationship. Further, when there is another target detection device in the vicinity, the control means 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 each target detection device, and even if it is a new target (alarm target), if it can be registered as an alarm target point, it will actually be Before the self receives the microwave from the target for the first time (first time), it is possible to give an alarm based on the position information. Further, when the microwave is received after that, it can be confirmed that the information at that point is accurate. If reliability information is added, it can be updated to increase the reliability based on the information.

The program of the present invention is a program for operating a computer as each means according to any one of (1) to (24) above. That is, in the embodiment, each means 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 by downloading or the like.

In the present invention, even if it is a new target, it is possible to make it possible to give an alarm based on the position information from the first time, or to provide information for that purpose.

It is a figure which shows one preferable embodiment of this invention. It is a flowchart which shows the transmission function of own vehicle position information and point data implemented in the control unit 18. It is a flowchart which shows the receiving function implemented in the control part 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. It is a flowchart which shows the reliability update function implemented in the control part 18. It is a flowchart which shows the reliability update function implemented in the control part 18. It is a figure explaining the reliability update function. It is a figure explaining the alarm based on the 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 object detection device 10 is a device that acquires the current position information of the vehicle and radio wave information coming from the outside, and gives an alarm / notification when the acquired information matches the set conditions. The target detection device 10 includes a microwave receiving unit 11, a GPS receiving unit 12, a wireless transmitting / receiving unit 13, an input unit 14, a display unit 15, a speaker 16, an internal non-volatile memory 17, and a control unit. It includes 18 and an SD slot 19. Each of these devices / members is mounted in one case or in a plurality of cases as appropriate.
The microwave receiving unit 11 receives the microwave in a predetermined frequency band and sends the received signal to the control unit 18. The predetermined frequency band is, for example, a frequency band including the frequency of the microwave 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 the position information (longitude, latitude) of the obtained current position to the control unit 18. In the present embodiment, the wireless transmission / reception unit 13 transmits / receives data to / from another nearby target detection device 10.

The input unit 14 is an interface for the user to give various settings and instructions to the control unit 18, and is not shown as an operation switch, an operation unit such as a touch panel that the user directly touches, or a remote controller receiver. Some receive instructions by communicating data with an external remote controller (portable device: slave unit). It comprises one or more of these.

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

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

In this example, the SD slot 19 is mounted in the case, but the case does not have a built-in device for mounting an external non-volatile memory such as the SD slot 19, for example, a terminal for connecting a memory card reader to the case. By providing (adapter jack) and connecting a memory card reader to the adapter jack, the data stored in the memory card mounted on the memory card reader may be taken into the inside.

The control unit 18 is composed of a microcomputer including a CPU, a memory, an I / O, and the like, and can access the SD memory card 20 which is an external recording medium installed in the SD slot 19 to read and write data. For example, when the SD memory card 20 stores the position information of the target object to be updated, the control unit 18 reads the data to be updated and stores the data in the internal non-volatile memory 17, so that the update process can be performed. You can.

The control unit 18 executes a predetermined process based on the information input from the above-mentioned various input devices (receiver, etc.), and uses the output device (display unit 15, speaker 16, etc.) to perform a predetermined alarm / message. Is output. As a predetermined process for determining the alarm content based on the information input from the input device, basically the same as the conventional one can be used. That is, when the current position information acquired from the GPS receiving unit 12 and the position information of the target object to be detected stored in the internal non-volatile memory 17 are in a predetermined positional relationship (within a set distance, etc.), or When the microwave receiving unit 11 receives / acquires a signal satisfying certain conditions such as when a predetermined microwave is received, the corresponding alarm is output. The alarm using the speaker 16 includes a buzzer, a voice, and the like. Further, 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 (for example, every 5 seconds) acquires the position information of the current vehicle from the GPS receiving unit 12, and stores and holds it in the memory in the control unit 18 or the internal non-volatile memory 17. The vehicle position information is updated regularly. When the set event occurs, the control unit 18 creates point data (position information of the target object, etc.) from the position information of the own vehicle at that time, and stores it in the internal non-volatile memory 17. The set event may be, for example, a case where a set input is made via an 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 measuring device. If the determination of whether or not the microwave is from the vehicle speed measuring device is based on the frequency of the received microwave, the radio wave from the malfunction source such as the automatic door is also registered. Therefore, for example, reception It can be judged based on the reception level of the microwave. As a technique for discriminating between a radio wave from a malfunction source and a radio wave from a vehicle speed measuring device to be detected based on the received microwave, a conventionally known technique can be used, and a detailed description thereof will be omitted. In addition, the case where the point data registration instruction is manually received by operating the switch is, for example, when the person in the vehicle recognizes that the speed is being measured or is being prepared. May perform certain switch operations. As a result, point data can be registered (manual registration) based on the manual recognition of the installation position of the speed measuring device regardless of whether or not microwaves are received.

The control unit 18 wirelessly transmits the vehicle position information to the outside (surroundings) using the wireless transmission / reception unit 13 on a regular basis (for example, every 5 seconds). In the present embodiment, the process of transmitting the vehicle position information and the process of registering the vehicle position information in the memory, which are periodically performed, are both set to an interval of 5 seconds, but the processing intervals of the two may be the same or different. You may. Further, when they are the same as in the present embodiment, the respective processing timings may be the same, that is, the own vehicle position information may be acquired, stored in the memory, and transmitted, or the respective processing may be performed independently of each other. (Store, send) may be executed. If there is another target detection device 10'in the vicinity, the vehicle position information transmitted as described above is received by the target detection device 10'.

Further, when the control unit 18 confirms the existence of another target detection device 10'in the surroundings, the control unit 18 transmits the point data possessed by the control unit 18. The existence of the other target detection device 10'is confirmed, for example, by receiving the own vehicle position information of the other target detection device 10'transmitted from the other target detection device 10'. be able to. This transmitted point data is received by another target detection device 10'existing in the surrounding area. The point data received in this way is stored in the internal non-volatile memory 17 of the other target detection device 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 non-volatile memory 17 Store in.

In this way, the point data registered by itself when an event occurs and the point data acquired from another target detection device 10'received via the wireless transmission / reception unit 13 are registered in the internal non-volatile memory 17. ..

Then, the control unit 18 also performs alarm control based on this point data. That is, the control unit 18 issues an alarm when the current position of the own vehicle obtained from the GPS receiving unit 12 and the position information specified by the point data have a predetermined relationship (within a certain distance). Therefore, since the alarm is issued using not only the point data collected by the self but also the point data collected by the other target detection device 10', other areas that existed in the area even in the first area. By acquiring the point data from the target detection device 10'in advance, it is possible to issue an alarm based on the position information. That is, when the point data is not received from the other target detection device 10', the target detection device 10 receives the microwave emitted from the target (microwave source) corresponding to the point data. However, in this case, the existence of the detection target can be recognized in advance based on the position information.

Further, when the point data is transmitted, all the point data stored in the internal non-volatile memory 17 at the time of transmission including the point data acquired from the other target detection device 10'is transmitted. By doing so, point data can be shared among multiple target detection devices, point data in various areas can be efficiently collected, and an alarm can be issued based on appropriate point data and own vehicle position information. can.

Furthermore, if the point data is registered by manually operating the switch, for example, if the operation is performed based on seeing that the speed is being measured in the opposite lane, the opposite lane is entered. The target detection device mounted on the traveling vehicle acquires the registered point data based on the switch operation, so that the speed is measured in advance at the end of the road on which the own vehicle is traveling. You can know that.

Next, a specific processing function for registering the above-mentioned point data and performing transmission / reception processing will be described. First, the vehicle position information stored and stored in the internal non-volatile memory 17 includes a unit ID for identifying (identifying) the target detection device, latitude / longitude information for specifying the current position of the target detection device, and including. Further, the vehicle position information may include an empirical value which is the number of times the point data is transmitted / received to / from another target detection device.

For this experience value, for example, transmission is performed based on the user setting of whether or not to perform transmission, and the experience value based on the number of transmissions (simply, the number of transmissions) is stored. When the control unit 18 issues an alarm, the alarm mode may be different based on the empirical value. Different alarm modes mean that the higher the experience value, the more interesting the user is, for example, by decorating it, changing the design displayed on the display, or notifying more useful information. good. Since it is desirable that whether or not to transmit can be arbitrarily set by the user's intention, it is also possible to prevent transmission by the user setting as described above. In this case, by making the alarm mode different based on the experience value, the user chooses to actively transmit, the point data shared between the users increases, and the effectiveness and usefulness of the system. Will increase.

On the other hand, the point data includes information in which the unit ID, latitude / longitude information, registration date, registration attribute, and reliability are associated with each other. The unit ID is a code for identifying the target detection device 10 in which the point data is registered, and the unit ID of the self is registered for the point data registered by the self regardless of whether it is manual or automatic. The latitude / longitude information is position information indicating (specifying) the existence position of point data. The registration date is data that identifies the date on which the point data was registered, and may also have time information. As the information of these registration dates, an internal clock can be provided and the clock information can be used, or the GPS signal received by the GPS receiving unit 12 can be used.

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

In addition, when it is determined that the source of malfunction is used and points for which automatic registration is prohibited are registered, the registration attribute is set to "automatic registration prohibited". The point at which this automatic registration is prohibited is, for example, when microwaves are received in the same or nearby area after that, it is determined that the radio waves are from the malfunction source based on the information, and the predetermined processing (no alarm is issued, It is possible to lower the reception sensitivity and do not automatically register point data).

The reliability is the reliability (likeness of the target to be detected) information of the point data. In the present embodiment, the reliability is specified by a numerical value, and the larger the value, the higher the reliability (reliability). At the time of registration, "1" is set as a reference value, and if point data is registered at the same point even in different target detection devices, the reliability is updated to be high. Depending on this reliability value, the display and alarm method can be changed. Based on the above-mentioned premise configuration, the following functions are implemented in the control unit 18.

* Automatic point data registration function When the control unit 18 receives a microwave that matches a predetermined condition, the control unit 18 registers the point data with the reception as a trigger. The registration destination of the point data is the internal non-volatile memory 17. The predetermined condition is that the frequency of the received microwave is within a preset range, is sudden and short-time (for example, continuous reception time is 3 seconds or less), and the reception level is high. A large reception level means that the reception level is higher than the reception level of microwaves emitted from a measuring device that constantly outputs microwaves, such as an automatic vehicle speed measuring device fixedly installed on the side of a road. The reception level is set to a level one or more steps higher than the reception level of microwaves from the automatic vehicle measuring device that is constantly output by dividing the receivable range into a plurality of steps (for example, 6 steps).

The control unit 18 that has recognized that it has received a microwave that meets the above conditions 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 object such as a fixed speed measuring device that constantly outputs microwaves, the position information is registered in advance in the internal non-volatile memory 17, and the position information is based on the position information. An alarm is given. Therefore, even if the microwave received from the speed measuring device is received, it is not necessary to register the point data based on the microwave. Therefore, like the fixed speed measuring device, a predetermined area centered on a pre-registered target (for example, within a radius of 1 km / area) is set as an automatic registration prohibited area, and within the automatic registration prohibited area, Even if microwaves that meet the conditions for automatic registration are received, point data is not registered based on the reception.

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

* Automatic point registration prohibition function When a microwave is received from a malfunctioning source such as an automatic door, it happens to meet the above-mentioned predetermined conditions, and it is judged as a microwave from the target to be detected and registered as point data. There is a risk of doing so. In the case of a microwave that meets a predetermined condition, it is difficult to distinguish whether it is from a target object to be detected such as a speed measuring device or a malfunction source in one reception. Therefore, in the present embodiment, when the control unit 18 meets the predetermined conditions, the control unit 18 once determines that it is from the target object to be detected and registers it as point data (automatic registration), and from the subsequent reception status. When it is determined that the microwave is from the malfunction source, the registration attribute is controlled to be changed to "automatic registration prohibited".

The condition for changing to "automatic registration prohibited" in this way is that the same point is received N times (for example, 3 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 (open), so that the microwaves can be received even if the vehicle travels in the vicinity on different days. .. On the other hand, in the case of a mobile speed measuring device, although it may be received multiple times on the same day, it is not fixed, so that it is emitted from the speed measuring device at the same point on a plurality of different days within a certain period of time. It is unlikely to receive microwaves. Therefore, when microwaves that meet the predetermined conditions are received at the same point on different days, specifically on different three days, it is determined that the microwave is from the malfunction source, and the control unit 18 determines that the corresponding point data is Changed the registration attribute to "Automatic registration prohibited". Even if the microwave is from the same malfunction source, it is unlikely that the position where it is received will be exactly the same point. Therefore, in the present embodiment, when a microwave that meets the above-mentioned conditions for automatic registration is received within a radius of 200 m centering on the position of the point where the registration attribute for which the point data has already been registered is automatic registration. , Microwaves emitted from the same source as the point data.

Then, in such management, the received date may be stored in the same table in association with the point data, or a storage area for registering the separately detected date may be provided. Since it is necessary to recognize that the data has been received three times on different days, for example, the point data is provided with an area for storing the detection date detected after the registration date together with the registration date. Then, when the control unit 18 receives the microwave that matches the above-mentioned predetermined condition, the control unit 18 searches the registration area of the point data in the internal non-volatile memory 17 using the detected position as a key, and in each point data. The distance between the latitude / longitude information and the current position is calculated, and it is determined whether or not the calculation result is 200 m or less. Then, in the case of 200 m or less, the registration date stored in the point data and the detected current date are compared, and if they are different, the current date is registered as the detection date. Then, when the detection date is already registered, if the current date is different from both the registration date and the detection date, microwaves emitted from the same source are received on three different days. Therefore, the registration attribute of the point data is rewritten to "Automatic registration prohibited".

When the registration attribute of the point data is "automatic registration prohibited", the automatic registration prohibited area is set within 200 m centering on the position (latitude / longitude) of the point, and the conditions for automatic registration are met within the automatic registration prohibited area. Even if microwaves are received, point data is not registered based on the reception, and an alarm is not issued based on the point data.

Even if the above-mentioned registration attribute is in the "automatic registration prohibition" or the automatic registration prohibition area set based on the position registered as a regular target, the registration instruction based on the manual or the external non-volatile memory ( When there is a registration instruction using the SD memory card 20), the control unit 18 registers the point data based on the instruction (registration attribute is "manual").

* Limitation of manual registration The above-mentioned automatic registration cannot be performed when speed measurement does not use microwaves or when the microwave output time is extremely short. However, the driver who has passed the site where the speed is being measured can visually confirm the site. Therefore, it is preferable to enable manual registration 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 some people will register unnecessarily (including mischief), which is not preferable because many points will be added to other target detection devices, and alarms will occur frequently and become complicated. Therefore, when the manual registration operation is performed more than the set number of times within the set period such as one day, the control unit 18 restricts the transmission so that the transmission cannot be performed, or the control unit 18 is manually registered during that period. Performs processing such as deleting point data. As a result, the above-mentioned nuisance can be prevented, point data can be registered based on appropriate manual registration, and notification to other target detection devices can be performed.

* Point data transmission function As described above, each target detection device transmits its own vehicle position information on a regular basis (every 5 seconds). Therefore, when the control unit 18 receives the own vehicle position information of the other target detection device via the wireless transmission / reception unit 13, it means that another target detection device exists in the vicinity. Therefore, the point data owned by the user is transmitted. The point data transmitted at this time includes not only the point data created / registered by the user but also the point data received from another target detection device.

The items of the point data are at least the distinction of the point data, the position information, and the unit ID. When there is reliability as an item of point data as in the present embodiment, the reliability may also be transmitted, or may not be transmitted in order to reduce the communication time. Further, even when transmitting, the reference value = 1 may not be transmitted, and may be transmitted only when the reliability is updated. Further, the unit ID is a unit ID registered as point data, that is, an ID of a target detection device in which point data is initially registered. For example, in the case of point data automatically registered / manually registered by oneself, it is the unit ID of oneself, but in the case of point data received and registered from another target detection device, the unit of another target detection device. It becomes an ID.

Further, as the point data to be transmitted, all the point data owned by the user may be transmitted, or some point data may be selected and transmitted. When transmitting a part of the point data, the point data to be transmitted may be randomly selected or may be selected according to a predetermined rule. Data communication using the wireless transmission / reception unit 13 of the present embodiment is set to about 2400 bps at the earliest. Therefore, it is not possible to send a large amount of data in a batch. Therefore, the control unit 18 selects the point data to be transmitted at one time according to a predetermined rule. In this predetermined rule, in the present embodiment, the one existing in the vicinity of the current vehicle position information is preferentially selected. As a result, other target detection devices that receive the transmitted point data can preferentially receive the point data in the vicinity of the own vehicle at that time, so that timely information can be efficiently acquired. be able to.

Specifically, a point existing in a predetermined area (for example, a radius of 2 km) from the acquired vehicle position information stored and held in the memory in the control unit 18 or the internal non-volatile memory 17 is acquired. Extract the data and send the extracted point data. Further, the number of point data to be transmitted at one time can be arbitrarily set, and may be one or a plurality of predetermined numbers. In this embodiment, the number is one. As a result, the radio band usage time occupied by one target detection device 10 for transmitting point data is shortened, and the number of units (target detection devices) existing in the surroundings and participating in communication is increased. Can be done. The larger the number of participating units, the wider the network, the more diverse information can be collected, and the more reliable the information is, which is preferable.

Further, if one point data is transmitted in one transmission process, the control unit 18 compares the "registration date" of each point data when a plurality of point data exist in an area within 2 km. Then, the "registration date" is sent by rotation in order from the newest point data. This is because the old point data on the registration date is likely to have already been sent and distributed (registered) to other target detectors, so by sending from the new point data, less updates will be made. Data can be sent and received efficiently in time. That is, even if all the corresponding point data cannot be transmitted, the point data that is likely to be unregistered in other target detection devices can be preferentially transmitted, and each target detection device can transmit the point data. , New point data can be efficiently acquired and stored. In addition, the new data on the registration date is likely to be more useful information, such as the vehicle speed measuring device that is currently performing speed measurement processing, so from that point of view, it is new based on the registration date. It is preferable to send from.

When all the relevant point data has been transmitted, it may be transmitted again from the beginning, or the area to be transmitted is expanded (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 process may be omitted, the area may be expanded to extract the corresponding point data again, or all points. You may want to send the data. In this case, there are many cases where a plurality of point data exist, but the priority of the point data to be transmitted is various, such as the order of newest registration date or the order closer to the current position as described above. Method can be adopted. Then, in the present embodiment, the corresponding point data is repeatedly transmitted without expanding the area within 2 km.

Further, the point data may be transmitted independently or may be transmitted together with the own vehicle position information. In this embodiment, it is transmitted together with the vehicle position information. That is, the timing of transmitting the point data to the surroundings is periodically transmitted at regular intervals in the same manner as the vehicle position information. Of course, when the vehicle position information from another target detection device is received, the process of transmitting the point data owned by the vehicle may be immediately started.

In the present embodiment, the period for transmitting the point data is set to the period during which another target detection device is present in the surrounding area. Specifically, the control unit 18 stops transmitting point data when the vehicle position information from another target detection device cannot be received for a certain period of time (for example, 1 minute). Then, in the present embodiment, since the point data and the own vehicle position information are transmitted as a pair, if the own vehicle position information from another target detection device cannot be received for a certain period of time as described above, the vehicle position information cannot be received for a certain period of time. , Repeats the transmission of only the vehicle position information.

FIG. 2 shows an example of an algorithm for realizing the above-mentioned point data transmission function and the transmission function including the vehicle position information transmission function. In this example, the point data is transmitted as a pair with the vehicle position information. When the vehicle position information is transmitted at a predetermined timing (S1), the first timer (built-in control unit 18) for recognizing the transmission cycle is restarted (S2). Then, it waits for the own vehicle position information sent from another target detection device to be received (S3, S4). If the first timer does not receive the time even after the time is up (5 seconds have elapsed), the process returns to process step S1 and the own vehicle position information is transmitted. Actually, the control unit 18 passes the vehicle position information to the wireless transmission / reception unit 13 together with the transmission request, 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 non-volatile memory 17 to obtain 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 from the point data (S7). That is, when the point data to be transmitted at one time is 1, and there are a plurality of point data in the vicinity, the point data is read one by one in order from the one with the newest registration date. The items of the point data to be read here are at least the unit ID and the position information.

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

After executing these processing steps S8 / S9, it waits for receiving the own vehicle position information (point data may be added) of another target detection device (S10, S11). If it is received (Yes in S10), it returns to the processing step S5, restarts the second timer, and executes the transmission processing of the point data and the like after S6. Further, if the second timer times out (for example, one minute has passed), it can be determined that there are no other target detection devices in the vicinity, and the process returns to step S1 to return to the normal own vehicle position information. 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 non-volatile memory 17. At this time, it is easily expected that the point data based on the same generating factor (microwave source) will be notified from a plurality of different target detection devices, and the point data already automatically or manually registered by the self. It is also expected that the point data about the same target (microwave source) as the point data registered based on the reception from the target and other target detection devices will be received. At this time, the latitude / longitude information of each point data is rarely exactly the same, and it is expected that the positions are slightly different.

Therefore, in the present embodiment, the control unit 18 is provided with a point data receiving function that performs the processing as shown in FIG. That is, it waits for receiving point data from another target detection device (S15). Then, when the point data is received, the control unit 18 searches for the existing point data registered in the internal non-volatile memory 17 using the latitude / longitude information of the received point data as a key, and performs the same target. It is determined whether or not there is point data presumed to be an object (causing factor) (S16). As a condition for presuming the same target, all points within a radius of 500 m centered on the latitude / longitude information of the already registered point data should be regarded as the same. Therefore, 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, it is the same, that is, the branch determination of S16 is Yes. And. In the present 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, but 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 step S15 and waits for the next point data to be received. Although the registration process is not performed as new point data, it is preferable to perform the reliability update process as described later. If the registered point data does not exist (S16 = No), the control unit 18 registers the point data received this time in the internal non-volatile memory 17 (S17). At this time, if the reliability is included as the transmission item of the point data, the received reliability is registered, and if the reliability is not included, the reference value = 1 is set for the reliability. ..

In this way, by not registering point data that is considered to be the same, points will be added more than necessary, alarms will occur frequently, and the number of points displayed on the display will increase in the dark clouds. It can be prevented from becoming difficult.

Further, in the present embodiment, when the points are considered to be the same, the received point data is discarded without being registered. For example, the position information is added / stored in association with the already registered point data. You may do so. As a result, there are a plurality of position information about one target to be detected. Then, at the time of an alarm, an alarm is issued when the position of the point data and the current position of the vehicle have a predetermined positional relationship, and the position of the point data at this time is determined from a plurality of position information registered in the point data. It can be the determined representative position. For this representative position, for example, the center of gravity / center position of a plurality of position information is obtained, and that position is used as the representative position, or the representative position is obtained from the bias of the position, and the representative position is calculated geometrically. Can be done.

Further, in the present embodiment, the position information of the point data is registered, and the alarm is issued when the position information is located within a predetermined distance (area) with the position information as the center. That is, the alarm area is within a predetermined radius. However, the present invention is not limited to this, and an alarm area may be defined by an ellipse, a quadrangle, or other predetermined geometric expression form, and an alarm may be issued when the own vehicle is within the alarm area. good.

* Point display function As described above, the control unit 18 automatically and manually registers the point data and the position information of the point data stored and saved in the internal non-volatile memory 17 based on the notification from the other target detection device. An alarm is issued when the vehicle position information and the vehicle position information have a predetermined positional relationship. As the mode of this alarm, an auditory notification such as a voice (sound) using the speaker 16 and a display unit 15 are used. There is visual notification.

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

The target icon Tn is indicated by a predetermined shape such as a circle, a quadrangle, or a star. In addition, it is advisable to change the color and size according to the type of the target object. Enlarge the more important ones, or display them in a prominent color such as red. Further, among the target icons Tn, there are an alarm target icon indicating a target object to be alarmed and a non-alarm target icon indicating a target object that is not an alarm target, depending on the positional relationship with the own vehicle. Here, the alarm target is a target that is in front of the traveling direction of the own vehicle (± 90 ° from the traveling direction) and has an alarm angle such as a speed measuring device that emits microwaves. It satisfies the condition within the angle (the alarm angle of the target ± 40 °). 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.

In addition, the display screen in the display area is displayed with the traveling direction of the own vehicle viewed upward. In this method, the control unit 18 obtains the traveling direction of the own vehicle based on the position information of the own vehicle given from the GPS receiving unit 12, and obtains the position of each target object in a state where the traveling direction faces upward, and is circular. It can be dealt with by displaying what exists in the display area of.

In the illustrated example, the entire circle centered on the vehicle progress icon I0 is displayed in the display area of the display unit 15, but for example, the vehicle progress icon I0 may be positioned downward on the screen. , Only a part of the circle may be displayed by enlarging the radius.

Then, the points registered as the above-mentioned point data are added to one of the target icons. That is, the control unit 18 acquires the position information of the own vehicle and the position information of the point data, and when the point data exists in the area of a circle within a predetermined radius centered on the position of the own vehicle, the control unit 18 is set to the corresponding position. Display 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 recognizes that another target detection device exists in the surrounding area.

Therefore, the control unit 18 has added another target detection device as one of the items (elements) to be displayed on the display unit 15. As a result, when the display mode of the display unit 15 is such that a target object existing around the own vehicle is marked and displayed, and another target object detection device is present in the display area, the display unit 15 is displayed. A target icon (mark) indicating "vehicle equipped with a target detection device" is displayed at the corresponding position.

By doing so, marks indicating the own vehicle and another vehicle are displayed on the same display screen, and the positional relationship between the two vehicles can be confirmed on the display screen. As a result, you can experience that this system is operating normally. Also, if the target icon indicating the point is displayed while the mark indicating another vehicle is displayed, it means that the point data is not registered in any of the own vehicle and other vehicles, so the surrounding area. In addition, it can be seen that there is a high probability that there is no cause for registering point data.

Next, each of the above functions will be described with specific examples. As shown in FIG. 5, the own vehicle equipped with the target unit A (ID = A) and the other vehicle equipped with the other target detection device B (ID = B) are each. It is assumed that the vehicle travels on a predetermined trajectory and is gradually approaching. As shown in FIG. 6, since the current position information of the own vehicle equipped with the target object detection device with ID = A changes as the vehicle travels, the own vehicle position information is updated regularly (at 5-second intervals), and at the same time, the own vehicle position information is updated. The vehicle position information is transmitted. When there is no other target detection device in the vicinity, the own vehicle position information from the other target detection device is not received, so that the control unit 18 updates the own vehicle position information stored in the memory and the same. 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 approach each other and the distance between them becomes less than a certain distance, the target detection device with ID = B starts to move. The vehicle position information to be transmitted can be received by the target detection device having ID = A. Then, the control unit 18 displays the target icon (reference numeral B in FIG. 7) corresponding to the target target detection device having the ID = B based on the received vehicle position information of the ID = B.

Further, when the control unit 18 recognizes the existence of the own vehicle position information of the other target detection device (ID = B) and recognizes the existence of the receiving device, the control unit 18 accesses the internal non-volatile memory 17 and based on the own vehicle position information stored by itself. If there is a point held within 2 km from the current position (“Point X” in the example of the figure), it is extracted, and as shown in FIG. 8, the self is at the time of transmission of the own vehicle position information. The point data about the point X is transmitted as a pair with the vehicle position information.

Although not shown, the target detection device with ID = B receives the transmitted data of the point X, determines whether it is new or registered, and if it is new, its own internal non-volatile. Register in sex memory. When the point data of the point X is not registered, the target detection device with ID = B newly registers the point data about the point X in the internal non-volatile memory, and the current position information and the position information of the point X are predetermined. When the relationship is reached, an alarm can be issued based on the location information. That is, for the target detection device with ID = B, the point X can issue an alarm based on the position information in advance without receiving the microwave even once.

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

Once the control unit 18 receives the own vehicle position information of the other target detection device and starts transmitting the point data owned by the control unit 18, the control unit 18 temporarily receives the own vehicle position information of the other target detection device. Continues to send point data even if you can no longer receive. 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 communication is not possible due to a busy state. Then, when the vehicle position information cannot be continuously received for a certain period of time (for example, 1 minute), it is determined that the other target detection device has separated, and the control unit 18 uses only the vehicle position information. Switch to transmission (end transmission of point data). Along with this, the target icon indicating the target detection device with ID = B is deleted (not displayed) from the display area of the display unit 15.

* Point data reliability update function As described above, at least when the point data is automatically or manually registered, the reliability is set as the reference value = 1 as the initial value. In this way, point data that is considered to be the same point as the hit point data may be transmitted from another one or a plurality of 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 advisable to add a reliability update function as shown in FIG. 9 to the control unit 18. The flowchart shown in FIG. 9 is based on the reception function of FIG. 3 and has processing steps S18 and S19 added. The parts of the processing steps S18 and S19 can be said to be the reliability update function, and the flowchart shown in FIG. 9 may be regarded as the reception function with the reliability update function.

Specifically, it waits for the point data to be received (S15), and determines whether or not the point data presumed to be the same target (causing factor) as the received point data has already been registered (S16). .. Then, if it is registered (S16 = Yes), the control unit 18 determines whether or not it is the point data from the new target detection device (S18), and if it is new, stores it in the point data regarded as the same. The 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 point data is from a new target detection device can be determined by using additional information. That is, when the unit ID is registered as additional information, it can be determined that it is new when the unit ID of the point data this time is not registered as additional information. Further, when the location information is registered as additional information, it can be determined that the location information is new when the exact same location information is not registered. This is because it is unlikely that the position information registered by different target detection devices will be exactly the same.

If the registered point data does not exist (S16 = No), the control unit 18 registers the point data received this time in the internal non-volatile memory 17 (S17). At this time, if the reliability is included as the transmission item of the point data, the received reliability is registered, and if the reliability is not included, the reference value = 1 is set for the reliability. ..

In this way, if No in S16, neither automatic registration nor manual registration is performed (point data is not registered in the target detection device itself), and point data is notified from another target detection device. If you receive it. Then, the point data registered in connection with the notification from the other target detection device in this way also becomes the registered point data to be compared at the time of branch determination in the processing step S16 after the registration. Therefore, when the point data that seems to be the same target is newly received from another target detection device after this registration, the branch determination in the processing step S16 is Yes, and the newly received point data is the branch determination in S18. It is determined whether or not the target detection device in which the point data is registered is different from the target detection device in which the above-mentioned already registered point data is registered first. If the judgment is Yes, the point data registered by different other target detection devices for the same target (point) is received, as compared with the case where it is received from only one target detection device. It can be said that the reliability is high, and the reliability is high.

That is, the point data registered by automatic registration or manual registration and the point data registered by another target detection device received may be point data for the same target, or from a plurality of separate target detection devices. If the received point data is for the same target (created by different sources), there is a high possibility that the target corresponding to the point data is the detection target, so as described above. I tried to increase the reliability each time.

FIG. 10 shows a reliability update function when the point data is registered by receiving from another target detection device first, and then the user tries to automatically or manually register the point data. When the control unit 18 detects a microwave satisfying a predetermined condition (Yes in S21), it tries to register the point data, but at this time, determines whether or not it has already been registered as the point data (Yes). S22). In this judgment, as in the case of the various functions described above, the position registered as point data is compared with the current position, and if both are within a certain distance, it is judged to be the same target, and the target has already been determined. Judge as registered. Then, when registered, the control unit 18 confirms the unit ID stored in the point data and determines whether or not it is its own unit ID (S23). When registered along with reception from another target detection device (No in S23), since the unit ID stores an ID other than the self, it can be judged that the self has detected the point for the first time, so the reliability is updated. (+1 increment). On the other hand, in the case of its own unit ID (Yes in S23), the reliability registered by itself in the past is not updated. If the branch determination in S22 is No, it means that the point data is new, so registration processing is performed (S25).

Furthermore, as another reliability update function, reliability information is added to the point data, the target detection device on the transmitting side transmits the "self" unit ID and the point data, and the target on the receiving side is detected. In the device, the point data about the point that can be regarded as the same as the point that identifies the alarm target corresponding to the received position information is already registered in the point data storage unit, and the unit ID of the point received this time and the storage unit store it. If the unit ID is different from the unit ID, the reliability may be increased.

That is, when the position information of points that can be regarded as the same is received from a plurality of target detection devices, the reliability is higher than when the notification is received from only one target detection device, and further, "plurality" However, the higher the number, the higher the reliability. Therefore, the reliability may be increased (incremented by +1) each time the point data of points that can be regarded as the same is received from different unit IDs. Of course, the same point data may be received multiple times from the same target detection device, but in that case, if it can be recognized that they are the same by comparing with the unit ID associated with the point data received in the past. , The reliability of the point data will not be increased (updated) due to the reception of the point data this time.

In addition, the point data received from another target detection device is not necessarily the one automatically / manually registered by the source target detection device, but the point data sent from yet another target detection device. It may be point data received and registered, or it may be point data transmitted by oneself in the past. Therefore, as described above, if the reliability is determined simply based on the difference in the unit IDs of the transmission sources, the target detection devices (creators) registered first may all be the same. In such a case, even if the point data is received from a plurality of target detection devices, it can be judged that the reliability is low as compared with the case where all the creation sources are different. Therefore, even if the unit IDs are different, if the latitude and longitude are exactly the same, it is better to assume 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 also taken into consideration, and if the latitude, longitude, and registration date are exactly the same, it is presumed that the creation source is the same and the update process is not performed. This is because even if the point data is registered by different target detection devices, there is still a possibility that the latitude and longitude will be exactly the same by chance. Of course, in order to perform the reliability update process by a simple process, as described above, the determination may be made based on the unit ID of the source (without using latitude, longitude, etc.).

By using these reliability update functions, for example, as shown in FIG. 11 (a), when the point X is already registered as point data, the point Y (FIG. 11 (b)) is transmitted from another target detection device. )), Since Y is not within 500 m 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. 11C, if the point Z is received from another target detection device, it is determined that the Z is within 500 m of the X, and the point Z is newly determined based on the Z. Although the point data is not registered, the reliability of the point data for X that was originally registered is high.

* Point data life management function When considering the use of point data received from other target detection devices, the point data is often temporary speed measurement using a mobile speed measurement device, and the registration date. It can be said that it is not very likely that the same speed measurement will be performed at the same place on other days. Places where measurements are taken using a mobile speed measuring device on a regular basis will become famous to some extent, so it can be dealt with by registering them separately as basic data in advance.

On the other hand, if the speed is measured at a certain position and the point data is often registered at that time, the number of registered point data increases, and alarms based on the point data occur frequently. Moreover, if there are many cases where the frequent alarms are not actually related (there is no target to be detected), the attention may be distracted and an unfavorable result may occur.

Therefore, in the present embodiment, the control unit 18 compares the registration date, which is one of the parameters of the point data, with the current date and time (which can be acquired from the GPS signal), and has a life of the point data as shown below. Let's change the content of the alarm.
Date when the current date and time was registered: Alert as today's point Within 2 weeks after registration: Alert as recent point Within 1 month after registration: Alert as point within the past 1 month Within 2 months after registration: Past Warning as points within 2 months Within 3 months after registration: Warning as points within the past 3 months 3 months have passed since registration: No warning

The above alarm can be notified by voice, and when it is output to the display unit, it can be output as a message, or it can be displayed in different colors and sizes.

* Additional information addition function for existing targets In the internal non-volatile memory 17, areas where speed measurement is performed regularly and frequently using a mobile speed measurement device based on sighting information etc. are registered, and the control unit Eighteenth may have a function of issuing a predetermined alarm when approaching the area. When such a function is provided, when a request for adding new point data occurs due to a notification from oneself or another person, the point data corresponds to the above area from the position information of the point data. If it can be recognized, the detection record will be added to the area as additional information. When this detection record is added, it is possible to issue an alarm with a more reliable response (additional information is also added by voice to notify, etc.). As a result, it is possible to give an alarm in consideration of reliability without additionally registering point data.

* Point alarm function In the case of point data, it is difficult to add directional information (microwave emission direction, etc.). Therefore, the alarm range was expanded beyond the normal range. For example, as shown in FIG. 12, if the player enters within 1100 m (approaching the center position) around the position of the point data, a 1 km warning is issued, and if the player enters within 600 m, a 500 m warning is issued. Then, once the vehicle has entered the range of 500 m (approaching the center position), the departure notice is given when the vehicle leaves the range of 1100 m.

* Communication specifications By the way, the target detection device 10 periodically transmits its own vehicle position information (some with point data). Therefore, when the transmission intervals of the target detection devices 10 are set to exactly the same value (5 seconds), as shown in FIG. 13A, a plurality of target detection devices (two in the figure) have substantially the same timing. When carrier sense is started, since the vehicle position information is not transmitted from other target detection devices at that time, there is a possibility that there will be no carrier and reception processing will not be performed, and processing to start transmission at the same time will be repeated endlessly. There is. Then, since they are transmitted at the same time, there is a problem that the exchange of data between the target detection devices 10 cannot be established.

Therefore, the transmission interval (transmission cycle) of each target detection device 10 is diffused by random numbers within a certain range with reference to a reference value (for example, 5 seconds). As a result, it is suppressed that the transmission cycle of each target detection device 10 becomes the same endlessly, and as shown in FIG. 13B, even if the carrier sense & transmission timings match at some point in time, At another time point, the timing of the carrier sense is deviated, and it is possible to receive the own vehicle position information and the like transmitted from the other target detection device.

Further, the wireless transmission / reception unit 13 is constantly performing 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 or not transmission is possible (without a carrier), and if transmission is possible without a carrier, the wireless transmission / reception unit 13 receives the transmission request, performs transmission processing, and is receiving. In this case, the transmission request is rejected because it cannot be transmitted. If there are multiple (many) target detection devices in the vicinity, transmission is started all at once at the moment when there is no carrier, and there is a risk of a communication error. Therefore, preferably, the waiting time (offset) from the end of reception to the next transmission start time is set to a different value in each target detection device so that transmission is performed from any one target detection device. It is good to do it. As a method of making this offset different, there is a method of changing it by using a random number or the like each time. By doing so, it is possible to suppress the possibility that the offsets of the plurality of target 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 in this way, the possibility that a plurality of target detection devices existing in the vicinity belong to the same group is reduced.

10,10'Target detection device 11 Microwave receiver 12 GPS receiver (position detector)
13 Wireless transmitter / receiver (wireless receiver)
14 Input unit 15 Display unit 16 Speaker 17 Internal non-volatile memory (database, point data storage unit)
18 Control unit 19 SD slot 20 SD memory card

Claims (4)

A device that controls to issue an alarm based on the position information of the vehicle speed measuring device stored in the storage unit that stores the position information of the vehicle speed measuring device collected by a plurality of vehicles.
The function to detect the position of the own vehicle and
A function of controlling to issue an alarm when the position information indicating the position of the own vehicle and the position information of any of the vehicle speed measuring devices stored in the storage unit have a predetermined positional relationship.
Have,
The vehicle speed measuring device emits microwaves that meet predetermined conditions.
The position information of the vehicle speed measuring device stored in the storage unit is registered based on the position where the microwave matching the predetermined condition is received by any of the plurality of vehicles.
When the position information determined to have been a microwave from the malfunction source based on the reception status of the microwave and the position information indicating the position of the own vehicle have the predetermined positional relationship, the micro from the malfunction source There line to a predetermined process when it is determined that the waves,
When it is determined that the predetermined process is a microwave from the malfunction source, and then a microwave that matches the predetermined condition is received in a predetermined area including the position indicated by the determined position information. A device including not automatically registering the position information of the vehicle speed measuring device in the storage unit based on the position where the microwave is received. A device that registers the position information of a vehicle speed measuring device that emits microwaves that meet predetermined conditions in a storage unit.
Based on the position of the received vehicle when microwaves satisfying the predetermined conditions are received in one or more vehicles, the position information of the vehicle speed measuring device is registered in the storage unit, and one or more of them are registered. The position information of the vehicle speed measuring device determined to have been microwaves from the malfunction source based on the reception status of microwaves in the vehicle is subjected to predetermined processing when it is determined to be microwaves from the malfunction source. have a function of registering in association with parameters for identifying that,
When it is determined that the predetermined process is a microwave from the malfunction source, and then a microwave that matches the predetermined condition is received in a predetermined area including the position indicated by the determined position information. A device including not automatically registering the position information of the vehicle speed measuring device in the storage unit based on the position where the microwave is received. Even if the microwave is not positioned when the microwave that matches the predetermined condition is received, the position information of the vehicle speed measuring device is registered in the storage unit based on the point positioned within the subsequent predetermined time. Be done
The device according to claim 1 or 2. A program for causing a computer to realize the function of the device according to any one of claims 1 to 3.

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