JP7450303B2 - equipment and programs - Google Patents

Description

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

2. Description of the Related Art A target object detection device that detects microwaves sent from a vehicle speed measurement device and provides notification is known. Even when this target detection device receives microwaves sent from a malfunctioning source such as an automatic door at a convenience store that uses the same frequency as the speed measurement device, it recognizes the microwaves as being received from the vehicle speed measurement device. There is a problem in that unnecessary warnings are issued. In light of these circumstances, recent target detection devices memorize the location information of the malfunction source, recognize the position of the own vehicle using GPS, and detect microwaves when the vehicle is located at the malfunction source. It also prevents unnecessary alarms from being issued by controlling them so that they do not issue any alarms.

Furthermore, devices for measuring the speed of vehicles are not limited to those using microwaves as described above. Some systems measure vehicles based on the time difference between detection signals output from two loop coils. Since this type of vehicle speed measurement device does not output microwaves, it cannot be detected by the target object detection device using microwave detection described above.

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

In a 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. In other words, if the stored position information is based on old installation information, an alarm (false alarm) may be issued at a location where the target object has already been removed, or the target object may be removed. Even if the location exists, the location is not registered in the storage means and no alarm is issued, reducing the reliability of the alarm.
In order to solve this problem, the user needs to update the position information of the detected object that is stored and retained even after purchasing the target object detection device. Such update processing includes updating using an external nonvolatile memory such as an SD card, downloading the latest position information data from a server online, and storing it in the storage unit of the target object detection device. This is done by Furthermore, as disclosed in Patent Document 1, there is a technique in which, when a radio wave of a detection target is received, position information of the detection target determined based on the received position is stored and held in a storage unit.

Japanese Patent Application Publication No. 9-27096

In the former case, if the user updates the latest location information by using an SD card or downloading it from a server online, the user must actively perform the update process by his or her own actions, which is complicated. Also, there is a risk that the old location information may remain as it is due to forgetting to update it.

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 waves emitted from the object to be detected the first time. Therefore, in the first reception, the presence of the object to be detected cannot be recognized in advance based on the position information.

The present invention was made in order to solve this problem, and even for a new target, it is possible to issue a warning based on 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 object detection device that can perform the following tasks.

In order to achieve the above-mentioned object, a target object detection device according to the present invention includes (1) a position detection section that detects the position of the own vehicle, a database that stores position information of the target object, and a position detection section that includes: an alarm control means that issues an alarm when the detected position information and the target position information stored in the database have a set positional relationship; and the position of a point that identifies the alarm target collected by the self. A point data storage unit that stores point data including information, and a transmission control unit that transmits at least position information of the point included in some or all of the point data stored in the storage unit. .

The database corresponds to the "internal nonvolatile memory 17" in the embodiment. The point data storage section corresponds to the "internal nonvolatile memory 17" in the embodiment. “Collected by oneself” means collected by automatic registration as in the inventions (8) and (9), collected by manual registration as in the inventions (10) and (11), or collected by manual registration as in the inventions (10) and (11). Various methods can be used, such as acquiring and collecting items registered by other target object detection devices as in the invention of .

The transmission control means transmits (wireless transmits) the position information of the point at an arbitrary timing. Then, if other target detection devices that can receive the transmitted position information exist around the target detection device of the present invention, the other target detection devices can take in the received position information and perform subsequent operations. , an alarm can be issued based on the position information for the alarm object (target) corresponding to the position information. In other words, the "other target detection device" can issue a warning based on the position information from the first time even if the target is a new target. The target object detection device of the present invention can provide effective information to other target object detection devices. Also, regarding the timing of transmitting position information, it may be transmitted periodically or irregularly, but as in the invention (2) below, when there are other target detection devices nearby, It's a good idea to send it.

(2) The transmission control means has a function of transmitting at least the position information of the point included in the point data upon receiving a notification request signal wirelessly transmitted from another target object 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 object detection device that has received the own vehicle position information can recognize the positions of both, and for example, display both on a display device. However, if such a function is not provided, it is possible to visually confirm that the system actually exists (that the system is operating). A notification request signal such as a command may also be used. When the target detection device receives such a notification request signal, it can confirm that there are other target detection devices around it that can use the point data information stored therein. Sending location information at that time allows for efficient communication (no transmissions are wasted). The timing and number of times the point location information is transmitted may be such that the notification request signal is sent only once or N times after receiving it, or it may be sent at predetermined intervals for a certain period of time after receiving it, or it may be sent at predetermined intervals after receiving the notification request signal. The data may be transmitted periodically (until it becomes unreceivable) or irregularly.

(3) Based on the invention of (2), the transmission control means has a function of stopping the transmission of the point data when the notification request signal cannot be received for a certain period of time (one 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 object detection devices have moved away. Further, even if the other party is nearby, it can be assumed that the other party is unable to communicate (the other party cannot receive the transmitted position information), so there is no need to perform unnecessary transmission processing. Note that even if there are other target detection devices nearby, the notification request signal may not be received several times due to the communication line being busy, etc., so do not stop sending the notification request signal as soon as it becomes unable to receive it. , it is preferable to transmit for a certain period of time as in the present invention.

(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 that the device owns, but if the number of points data that it owns increases, it will take time to transmit the position information of all the point data, and the information necessary for other target object detection devices will not be transmitted. There is a possibility that the message cannot be sent. Therefore, by setting point data existing around the current position as the transmission target, it is possible to efficiently transmit information that is currently necessary for other target object detection devices.

(5) Based on the invention of (4), if there is a plurality of point data to be transmitted, one point data is transmitted in one transmission process, and each point data is selected one by one as the transmission target. It is better to make it . By reducing the number of transmission targets to one, it is possible to shorten the time that a communication channel is occupied in one transmission process. Thereby, even if there are multiple (many) target detection devices around, each target detection device can communicate and information can be effectively acquired.

(6) The registration date on which the points were registered is added to the point data, and when transmitting some of the point data, the transmission control means gives priority to those with the latest registration date. It is good to target. If the registration date is old, there is a high possibility that it has already been sent and the other party's target object detection device also has it as point data (if the registration date is new, there is a high possibility that the other party does not have it), and for example If the registration date is today, if the detection target is a speed measuring device, there is a possibility that speed measurement is currently being performed, and information with higher importance and urgency can be efficiently transmitted.

(7) It is preferable that the registration date of the point is added to the point data, and if the registration date is older than a set standard, the point data is removed from the transmission target. 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 need to notify because there is no object to be alerted at the actual position of the point. Therefore, by not transmitting information with an old registration date, it is possible to reduce the load that occurs with the transmission process. Not transmitting the data may mean leaving it as data and simply not transmitting it, or deleting the data itself so that it cannot be physically transmitted.

(8) Equipped with an automatic registration function that automatically registers the point data upon reception of microwaves that meet set conditions, and the location of the point that specifies the alarm target collected by the self and stored in the point data. The information may be the current position detected by the position detection unit when receiving the microwave that meets the set conditions.

(9) Compare the position information of the point with the position information of the target stored in the database, and if the distance is shorter than the set distance, register the point data for that point using the automatic registration function. It is best to avoid doing so. If the "distance" is short, it can be assumed that the point to be registered and the target stored in the database are the same, so in such a case, by not registering the point data, unnecessary additional processing of information is required. In addition, the occurrence of unnecessary transmissions and the like associated with this can be suppressed.

(10) Based on the invention of (9), a manual registration function is provided to register the point data in response to a registration instruction from the user, and the position of the point that specifies the alarm target collected by the self is stored in the point data. The information may be the current position detected by the position detecting section when the registration instruction is given. In this way, there is a possibility that a detection target that does not emit microwaves or a detection target that will emit microwaves may emit microwaves even though they are being prepared (under installation) and are not actually emitting microwaves. You can register and provide information even if it is expensive. The registration instruction includes, for example, an instruction using a set switch operation, voice input, or the like.

(11) Equipped with a manual registration function that registers the point data in response to a registration instruction from the user, and the location information of the point that specifies the alarm target collected by the self and stored in the point data is stored in the point data when the registration instruction is given. the current position detected by the position detection unit at the time of the operation, an alarm mode based on the position information registered using the automatic registration function, and an alarm mode based on the position information registered using the manual registration function. It is better to do it differently.

(12) Based on the inventions (10) and (11), if the number of registration processes using the manual registration function is performed within a reference period is equal to or greater than a threshold value, the transmission control means is configured to perform at least the manual registration function. It is preferable to suppress the transmission of registered point data using . In the embodiment, the reference period is set in units of one day, but it may also be set in hours or multiple days. You can prevent unnecessary information from being sent to those around you by unnecessarily manipulating the manual registration function. All data (including automatically registered data) may be subject to transmission suppression. Furthermore, if the above conditions are met, the registration process itself may be invalidated (not performed).

(13) The point data may be one that is registered by another target object detection device and stored in its own point data storage unit. (14) Point data may be registered in association with a unit ID that specifies the target object detection device that first registered the point. (15) It is preferable to include means for periodically transmitting the position of the own vehicle (self-vehicle position information) detected by the position detecting section.

(16) The transmission control means performs transmission based on a user setting of whether or not to transmit, and stores an experience value based on the number of times of transmission, and the alarm control means transmits a transmission based on the experience value. It is preferable to use different warning modes. The alarm mode by the second alarm control means may be different. This experience value is updated so that, unlike reliability (reliability), the experience value becomes larger (higher) as the number of transmissions increases.

Since it is desirable that the user can arbitrarily set whether or not to transmit, it is also possible to prevent the transmission from being performed by user settings as described above. However, it is beneficial for users as a whole to exchange as much location information as possible. Therefore, for example, the more information you provide, the higher your experience value will be, and the warning mode will evolve, so that the number of users who send information will increase. According to this invention, it is possible to provide an environment in which a user is willing to send location information.

(17) A wireless receiving unit that receives location information of a point that specifies a warning target sent from another target object detection device, and stores the point data including the location information received by the wireless receiving unit in a point data storage unit. A second unit 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 are in a set positional relationship. It is preferable to include an alarm control means. The second alarm control means may be integrated with the alarm control means or may be independent. In this way, the target detection device provides information about the points collected by itself to other target detection devices, and acquires information about the points collected by other target detection devices. Since information about points can be shared, data can be collected efficiently.

(18) a position detection unit that detects the position of the own vehicle; a database that stores position information of a target; the position information detected by the position detection unit; and the position information of the target stored in the database; an alarm control means that issues an alarm when the target object is in a set positional relationship; a wireless reception section that receives position information of a point for specifying an alarm target sent from another target object detection device; point data registration means for registering point data including position information received by the unit in a point data storage unit; position information detected by the position detection unit; and position information of the point registered in the point data storage unit; , and a second alarm control means that issues an alarm when they are in a set positional relationship.

According to this invention, position information about points collected by other target detection devices can be acquired and a warning can be issued based on the position information, so even if the target is new, the position can be detected from the first time. It will be possible to issue warnings based on the information.

(19) Reliability information that specifies the certainty that the point is a warning target is added to the point data, and point data about points that can be regarded as the same as the point that identifies the warning target corresponding to the received location information is added. has already been registered in the point data storage unit, and the target object detection device that first registered the registered point data is different from the target object detection device that first registered the point received this time. It is preferable to include a reliability update function that controls the data reliability information to be high. When the same point is registered as point data by a plurality of different target object detection devices, the reliability of the point data becomes high. Therefore, when issuing a warning by the second warning control means, if the mode of the warning is changed according to the reliability information (the higher the reliability, the more important the warning is given so that the driver will be careful), By notifying the driver along with the reliability level, it is possible to provide the driver with information for determining the reliability of the warning based on the point data), thereby making it possible to issue an effective warning.

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

(20) Also, reliability information that specifies the probability that the point is a warning target is added to the point data, and the target object detection device on the sending side sends the "self" unit ID and point data. , the target object detection device on the receiving side has already registered point data in the point data storage unit about a point that can be considered to be the same as the point that specifies the alarm target corresponding to the received position information, and the unit of the point received this time has already been registered in the point data storage unit. If the ID and the unit ID stored in the storage section are different, a reliability update function may be provided to increase the reliability.

(21) When the position information of the point data stored in the point data storage section and the position information received this time are different, the reliability update function is configured to perform the function of The reliability information can be updated based on the determination that it is a point that has occurred.

(22) Adding the unit ID of the first registered target detection device to the point data, and associating the unit ID with point position information sent from other target detection devices; The reliability update function determines whether the received unit ID and the unit ID of point data stored in the point data storage unit are registered with different target detection devices. It's okay.

(23) If the received location information is within a set distance from the location information of point data already registered in the point data storage section, the point data registration means registers the point data based on the received location information. It is best not to do this. When such conditions are met, there is a high possibility that the same point will be registered, and registering multiple point data based on the same point will not only result in wasted memory capacity, but will also result in frequent alarms, which is not desirable. Solvable. Further, even if the point is actually at a different point, the alarm will be issued in the vicinity, so there will not be much of a problem in practice.

(24) The other target detection device is a target detection device specified in (17), and if it receives the position of the own vehicle sent from the other target detection device, the received It is preferable to include a display control means for displaying the positions of the own vehicle and other target object detection devices on the display unit based on the position of the own vehicle and the position information of the own vehicle detected by the position detecting unit. In this way, the positions of the self and other target detection devices are displayed on the display, allowing the user to confirm that the system is operating normally, and also to confirm that the system is operating normally. If a point-based alarm is not issued even though the target object detection device is displayed, 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 section (GPS reception section 12) that detects the position of the own vehicle, and a point data storage section (internal non-volatile memory 17), and a control unit (control unit) that registers point data including the received position information in the point data storage unit upon receiving position information of a point specifying a warning target sent from another target object detection device. 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. Furthermore, when there are other target object detection devices in the vicinity, the control means transmits position information of points included in some or all of the point data stored in the point data storage section. With this configuration, point data can be shared between each target detection device, and even if a new target (warning target) can be registered as a warning target point, it will be possible to actually It is possible to issue a warning based on position information before the target object first receives microwaves from the target object (first time). Further, if the microwave is received after that, it can be confirmed that the information at that point is accurate. If reliability information is added, the reliability can be updated based on that information.

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

According to the present invention, it is possible to issue a warning based on position information from the first time even for a new target, and to provide information for that purpose.

FIG. 1 is a diagram showing a preferred embodiment of the present invention. 3 is a flowchart showing a function of transmitting own vehicle position information and point data, which is implemented in the control unit 18. FIG. 3 is a flowchart showing a reception function implemented in the control unit 18. FIG. It is a figure which shows an example of the alarm screen using a display part. FIG. 3 is a diagram illustrating a function of transmitting and receiving vehicle position information and point data. FIG. 3 is a diagram illustrating a function of transmitting and receiving vehicle position information and point data. FIG. 3 is a diagram illustrating a function of transmitting and receiving vehicle position information and point data. FIG. 3 is a diagram illustrating a function of transmitting and receiving vehicle position information and point data. 3 is a flowchart showing a reliability update function implemented in the control unit 18. FIG. 3 is a flowchart showing a reliability update function implemented in the control unit 18. FIG. It is a figure explaining a reliability update function. It is a figure explaining the warning based on point data. FIG. 3 is a diagram illustrating control of transmission timing. FIG. 3 is a diagram illustrating control of transmission timing.

FIG. 1 shows a preferred embodiment of the invention. The target object detection device 10 is a device that acquires current position information of a vehicle and radio wave information coming from outside, and issues an alarm/notification when the acquired information matches a set condition. This target detection device 10 includes a microwave receiving section 11, a GPS receiving section 12, a wireless transmitting/receiving section 13, an input section 14, a display section 15, a speaker 16, an internal nonvolatile memory 17, and a control section. 18 and an SD slot 19. Each of these devices and members is mounted within one case or divided into a plurality of cases as appropriate.
The microwave receiver 11 receives microwaves in a predetermined frequency band and sends the received signal to the controller 18. The predetermined frequency band is, for example, a frequency band that includes the frequency of microwaves emitted from a vehicle speed measuring device. The GPS receiving unit 12 receives a GPS signal, determines the current position from the received GPS signal, and sends position information (longitude, latitude) of the determined current position to the control unit 18. In this embodiment, the wireless transmitting/receiving unit 13 transmits and receives data to and from other target object detection devices 10 in the vicinity.

The input unit 14 is an interface for the user to give various settings and instructions to the control unit 18, and includes an operation switch, a touch panel, and other operation units directly touched by the user, and a remote control receiver (not shown). There are devices that accept instructions, etc. by communicating data with an external remote control (portable device: child device). One or more of these.

The display unit 15 is realized using, for example, an organic EL display or a liquid crystal display. The internal nonvolatile memory 17 is composed of an EEPROM or the like. Information regarding a certain target object (position information including longitude and latitude, type information, etc.) is registered in this internal non-volatile memory 17 at the time of shipment. Additionally, various types of location information can be registered and updated in the internal nonvolatile memory 17 depending on use.

The slot of the SD slot 19 is exposed on the surface of the case, and an SD memory card 20, which is an external nonvolatile memory, can be removably inserted therein. This SD memory card 20 stores updated information such as information regarding new targets (location information including longitude and latitude, type information, etc.). The update information stored in the SD memory card 20 is stored (downloaded) in the internal nonvolatile memory 17 via the control unit 18, and the data is updated.

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

The control unit 18 is composed of a microcomputer including a CPU, memory, I/O, etc., and can access the SD memory card 20, which is an external recording medium inserted into the SD slot 19, to read and write data. For example, if the SD memory card 20 stores information such as the position of a target to be updated, the control unit 18 reads out the data to be updated and stores it in the internal non-volatile memory 17 to complete the update process. I can do it.

The control unit 18 executes predetermined processing based on information input from the various input devices (receiving unit, etc.) mentioned above, and outputs predetermined alarms and messages using output devices (display unit 15, speaker 16, etc.). Output. The predetermined process for determining the content of the alarm based on the information input from the input device can basically be the same as the conventional one. In other words, when the current position information acquired from the GPS receiving unit 12 and the position information of the object to be detected stored in the internal non-volatile memory 17 have a predetermined positional relationship (within a set distance, etc.), When the microwave receiving unit 11 receives or acquires a signal that meets certain conditions, such as when a predetermined microwave is received, a corresponding alarm is output. Note that the alarm using the speaker 16 includes a buzzer, voice, and the like. Further, although not shown, a warning lamp such as an LED may be provided as an output device.

In the present embodiment, the control unit 18 periodically acquires current vehicle position information from the GPS reception unit 12 (for example, every 5 seconds), and stores and retains the information in the memory within the control unit 18 or the internal nonvolatile memory 17. Regularly update your vehicle's location information. When a set event occurs, the control unit 18 creates point data (target object position information, etc.) from the own vehicle position information at that time, and stores it in the internal nonvolatile memory 17. The set event may be, for example, when a set input is made via the input section 14 such as a specific switch operation, or when a specific microwave is received by the microwave receiving section 11. The specific microwave is a microwave estimated to have been emitted from a vehicle speed measuring device. Note that determining whether or not the microwave is coming from a vehicle speed measuring device is simply based on the frequency of the received microwave, since radio waves from malfunctioning sources such as automatic doors will also be registered. This can be determined based on the microwave reception level etc. Conventionally known technology can be used to distinguish whether the received microwave is a radio wave from a malfunction source or a vehicle speed measurement device to be detected, and therefore a detailed explanation thereof will be omitted. In addition, a case where a point data registration instruction is received manually by operating a switch is, for example, when a person riding in a vehicle recognizes that a speed measurement is being performed or that the person is preparing to do so. Certain switch operations may be performed. As a result, point data can be registered (manual registration) based on manual recognition of the installation position of the speed measuring device, regardless of whether or not microwaves are being received.

The control unit 18 uses the wireless transmitting/receiving unit 13 to wirelessly transmit own vehicle position information to the outside (surroundings) periodically (for example, every 5 seconds). In this embodiment, both the periodic transmission process of vehicle location information and the registration process of vehicle location information in memory are set at 5 second intervals, but the processing intervals for both may be the same or different. It's okay. In addition, if they are made the same as in this embodiment, the respective processing timings may be the same, that is, the own vehicle position information may be acquired, stored in memory, and transmitted, or each processing may be performed independently of each other. (storage, transmission) may be executed. The own vehicle position information transmitted as described above is received by another target object detection device 10' if there is another target object detection device 10' in the vicinity.

Furthermore, when the control section 18 confirms the presence of other target object detection devices 10' in the surroundings, it transmits the point data that it owns. The existence of the other target detection device 10' is confirmed by, for example, 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 other nearby target detection devices 10'. The point data thus received is stored in the internal non-volatile memory 17 of the other target detection device 10'. In other words, the point data held by other target detection devices 10' is transmitted in the same manner as described above, so when the target detection device 10 receives such point data, it stores the data in the internal non-volatile memory 17. Store in.

In this way, the internal non-volatile memory 17 registers the point data registered by itself upon occurrence of an event and the point data received from another target object detection device 10' received via the wireless transmitter/receiver 13. .

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 vehicle position obtained from the GPS reception unit 12 and the position information specified by the point data have a predetermined relationship (within a certain distance). Therefore, since the warning is issued using not only the point data collected by the target object detection device 10' but also the point data collected by other target object detection devices 10', even if you visit the area for the first time, other target object detection devices existing in the area By obtaining point data in advance from the target object detection device 10', it is possible to issue a warning based on position information. In other words, if point data has not been received from another 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 presence of the detection target can be recognized in advance based on the position information.

Furthermore, when transmitting point data, all point data stored in the internal non-volatile memory 17 is transmitted, including point data acquired from other target detection devices 10'. By doing so, point data is shared between multiple target detection devices, it is possible to efficiently collect point data in various areas, and it is possible to issue warnings based on appropriate point data and own vehicle position information. can.

Furthermore, in the case where point data is registered by manual switch operation, for example, if the operation is performed based on seeing that speed measurement is being carried out in the opposite lane, The target object detection device mounted on the vehicle is able to measure the speed ahead of the road the vehicle is traveling on by acquiring point data registered based on the switch operation. You can know that.

Next, specific processing functions for registering and transmitting/receiving the above point data will be explained. First, the own vehicle position information stored and held in the internal non-volatile memory 17 includes a unit ID for specifying (identifying) the target object detection device, latitude/longitude information for specifying the current position of the target object detection device, including. Furthermore, it is preferable that the vehicle position information includes an experience value that is the number of times point data is transmitted and received with other target object detection devices.

This experience value is, for example, transmitted based on the user's setting of whether or not to transmit, and the experience value based on the number of times of transmission (simply, the number of times of transmission) is stored. When the control unit 18 issues a warning, it is preferable to vary the warning mode based on the experience value. Different alarm modes mean, for example, alarms with higher experience points are more decorated, the design displayed on the display is changed, or more useful information is notified to make the alarm more interesting to the user. good. Since it is desirable that the user can arbitrarily set whether or not to transmit, it is also possible to prevent the transmission from being performed by user settings as described above. In this case, by making the warning mode different based on the experience value, the user will actively choose to send it, the point data to be shared among users will increase, and the effectiveness and usefulness of the system will increase. increases.

On the other hand, the point data consists of information that associates a unit ID, latitude/longitude information, registration date, registration attribute, and reliability. The unit ID is a code for identifying the target object detection device 10 that has registered the point data, and the own unit ID is registered for the point data that has been registered by itself, whether manually or automatically. The latitude/longitude information is location information that indicates (specifies) the location of point data. The registration date is data that specifies the date on which point data was registered, and may also include time information. Information on these registration dates can be obtained by providing an internal clock and using the clock information, or by using a GPS signal received by the GPS receiving section 12.

Registration attributes are parameters for identifying registration factors, and include "automatic registration" which indicates points that are automatically registered based on reception of desired microwaves, and "manual" which indicates points that are manually registered based on user operations. There is "registration". This "manual registration" also applies to the registration attribute of point data registered using an external non-volatile memory such as an SD memory card.

Furthermore, if a point is registered that is determined to be a source of malfunction and automatic registration is prohibited, the registration attribute becomes "automatic registration prohibited." The point of prohibiting this automatic registration is, for example, if microwaves are subsequently received in the same or nearby area, it will be determined that the radio waves are coming from a malfunction source based on that information, and predetermined processing (such as not issuing an alarm, etc.) will be performed. (lower reception sensitivity, no automatic registration of point data).

The reliability is information on the reliability of point data (likelihood of being a target object to be detected). In this embodiment, the reliability is defined by a numerical value, and the larger the value, the higher the reliability. At the time of registration, "1" is set as the reference value, and if point data is registered at the same point even with different target object detection devices, the point data is updated to increase the reliability. Depending on this reliability value, the display and warning methods can be changed. Based on the above-mentioned configuration, the following functions were implemented in the control unit 18.

*Automatic point data registration function When the control unit 18 receives microwaves that meet predetermined conditions, the control unit 18 uses the reception as a trigger to register point data. The point data is registered in the internal non-volatile memory 17. The predetermined condition is that the frequency of the received microwave is within a preset range, the frequency is sudden and short (for example, continuous reception time is 3 seconds or less), and the reception level is high. A high reception level means that the reception level is higher than the reception level of microwaves emitted from a measurement device that constantly outputs microwaves, such as a vehicle speed measurement device fixedly installed on the side of the road. The reception level is set by dividing the receivable range into a plurality of stages (for example, six stages) and setting it at a level one or more stages higher than the reception level of the microwave from the automobile measuring device that is constantly output.

When the control unit 18 recognizes that it has received a microwave that meets the above conditions, it obtains the month and day (registration date) of the reception, its own unit ID, and the GPS reception unit 12 of the reception. The latitude and longitude, registration attribute = "Automatic registration", and reliability = "Reference value: 1" are associated and registered as point data.

Normally, in the case of a detection target that constantly outputs microwaves, such as a fixed speed measuring device, its position information is registered in advance in the internal non-volatile memory 17, and the position information is based on that position information. A warning will be issued. Therefore, even if microwaves are received from such a speed measuring device, there is no need to register point data based on them. Therefore, as with such a fixed speed measuring device, a predetermined area centered around a pre-registered target (for example, within a radius of 1 km) is an automatic registration prohibited area, and within that automatic registration prohibited area, Even if microwaves matching the conditions for automatic registration are received, point data is not registered based on the reception.

(Support for non-GPS positioning)
Furthermore, when a predetermined microwave is received, positioning may not be possible using a GPS signal. When GPS positioning is not performed, current position information cannot be recognized, so point data cannot be registered. However, if you are driving in a place where GPS signals can be received intermittently, such as under an overpass, the current position of your vehicle will be determined based on GPS positioning after receiving the specified microwave. There are things you can do. Therefore, even if positioning is not performed when the specified microwave is received, if positioning is possible in a relatively short time (for example, within 5 seconds), the point data of the measured point is registered as latitude and longitude information. I do. Even if you drive at 100km/h, you will only move about 138.9m in 5 seconds, so there is no problem in registering the above position as a point position. Rather, registering point data. The effect of this will be higher. Note that if there is no point that can be positioned within 5 seconds, automatic registration is not performed because the accuracy of the position information will be low. This non-GPS positioning support may also be performed during manual registration.

*Automatic point registration prohibition function If microwaves are received from a malfunctioning source such as an automatic door, it happens to meet the above predetermined conditions, and the microwaves are determined to be coming from the target object to be detected and registered as point data. There is a risk that it will happen. In the case of microwaves that meet predetermined conditions, it is difficult to distinguish from one reception whether the microwaves are from a target to be detected, such as a speed measuring device, or from a source of malfunction. Therefore, in the present embodiment, when the predetermined conditions are met, the control unit 18 once determines that the object is from the target object to be detected and registers it as point data (automatic registration), and then checks the reception status from the subsequent reception status. If it is determined that the microwave has come from a malfunction source, the registration attribute is controlled to be changed to "automatic registration prohibited".

The condition for changing to "prohibit automatic registration" in this way is that the same point is received N times (for example, 3 times) on different days. In other words, in the case of a malfunction source such as an automatic door, microwaves are emitted at least when the store is open (during business), so you can receive the microwaves even if you drive near the store on a different day. . On the other hand, in the case of a mobile speed measuring device, although it may receive signals multiple times on the same day, it is not fixed, so the speed measuring device may emit radiation from the speed measuring device at the same point on multiple different days within a certain period of time. There is little possibility of receiving microwaves. Therefore, if microwaves that meet the predetermined conditions are received at the same point on different days, specifically on three different days, it is determined that the microwaves are from a malfunction source, and the control unit 18 updates the corresponding point data. The registration attribute was changed to "Automatic registration prohibited". Note that even if the microwaves come from the same source of malfunction, it is unlikely that the microwaves will be received at exactly the same point. Therefore, in this embodiment, when a microwave that meets the above-mentioned conditions for automatic registration is received within a radius of 200 meters centered on the position of a point for which point data has already been registered and whose registration attribute is automatic registration. , is a microwave emitted from the same source as the point data.

For such management, the date of reception may be stored in the same table in association with the point data, or a storage area may be provided to separately register the detected date. Since it is necessary to recognize that the data has been received three times on different days, for example, an area is provided in the point data to store the registration date as well as the detection date detected after the registration date. When the control unit 18 receives microwaves that meet the above-mentioned predetermined conditions, the control unit 18 searches the registered area of point data in the internal nonvolatile memory 17 using the detected position as a key, and The distance between the latitude and longitude information and the current position is calculated, and it is determined whether the calculated result is 200 m or less. If the distance is 200 m or less, the registration date stored in the point data is compared with the detected current date, and if the two are different, the current date is registered as the detection date. If the detection date has already been registered and the current day is different from both the registration date and the detection date, microwaves emitted from the same source on three different days will be received. Therefore, the registration attribute of the point data is rewritten to "automatic registration prohibited".

If the registration attribute of point data is "Automatic registration prohibited", the area within 200m around the location (latitude/longitude) of that point is set as an automatic registration prohibited area, and within that automatic registration prohibited area, the conditions for automatic registration are met. 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.

Note that even if the above-mentioned registration attribute is "auto-registration prohibited" or it is within an automatic registration-prohibited area set based on the position registered as a legitimate target, manual registration instructions or external non-volatile memory ( When there is a registration instruction using the SD memory card 20), the control unit 18 registers point data based on the instruction (registration attribute is "manual").

*Limitations on manual registration If speed measurement is not using microwaves or if the microwave output time is extremely short, the automatic registration described above cannot be performed. However, a driver who passes through 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 indiscriminately (including mischievously), and if this happens, a large number of points will be added to other target object detection devices, resulting in frequent alarms and complication, which is not desirable. Therefore, if the manual registration operation is performed more than a set number of times within a set period such as one day, the control unit 18 restricts transmission and prevents transmission. Performs processing such as deleting point data. Thereby, the above-mentioned nuisance can be prevented, and point data can be registered based on appropriate manual registration and notification to other target object detection devices can be performed.

*Point data transmission function As described above, each target detection device transmits its own vehicle position information periodically (at 5 second intervals). Therefore, when the control unit 18 receives the own vehicle position information of another target detection device via the wireless transmission/reception unit 13, it means that there are other target detection devices in the vicinity. Therefore, send the point data that you own. The point data transmitted at this time includes not only point data created and registered by the device itself, but also point data received from other target object detection devices.

The items of point data are at least the distinction that it is point data, position information, and unit ID. As in this embodiment, when reliability is included as an item of point data, the reliability may also be transmitted, or may not be transmitted in order to reduce communication time. Further, even when transmitting, it is possible not to transmit the reference value=1, but to transmit only when the reliability has been updated. Further, the unit ID is the unit ID registered as point data, that is, the ID of the target object detection device that initially registered the point data. For example, in the case of point data automatically or manually registered by oneself, it will be the unit ID of the own unit, but in the case of point data received and registered from another target object detection device, the unit ID of another target object detection device will be used. It becomes an ID.

Further, as for the point data to be transmitted, all of the point data that the user owns may be transmitted, or a part of the point data may be selected and transmitted. When transmitting some point data, the point data to be transmitted may be selected at random or may be selected according to predetermined rules. Data communication using the wireless transmitter/receiver 13 of this embodiment is approximately 2400 bps at the earliest. Therefore, it is not possible to send large amounts of data all at once. Therefore, the control unit 18 selects point data to be transmitted at one time according to a predetermined rule. In this embodiment, this predetermined rule is such that those existing near the current own vehicle position information are selected with priority. As a result, other target detection devices that receive the transmitted point data can preferentially receive the point data near the own vehicle at that time, so they can efficiently acquire timely information. be able to.

Specifically, the vehicle position information stored and held in the memory within the control unit 18 or the internal non-volatile memory 17 is acquired, and points existing in a predetermined area (for example, a radius of 2 km) are determined based on the acquired vehicle position information. 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, there is one. This reduces the wireless band usage time that one target detection device 10 occupies to transmit point data, and increases the number of units (target detection devices) that exist in the surrounding area and participate in communication. I can do it. It is preferable that the number of participating units increases, since the network expands and information can be collected in a diverse range, and the reliability of the information improves.

Furthermore, if one point data is transmitted in one transmission process, if multiple point data exist in an area within 2 km, the control unit 18 compares the "registration date" of each point data. Then, point data with the most recent “registration date” will be sent in rotation. This is because point data with an older registration date is likely to have already been sent and distributed (registered) to other target detection devices, so by sending new point data first, fewer updates can be made. Data can be efficiently sent and received in a timely manner. In other words, even if it is not possible to send all applicable point data, point data that is likely to be unregistered to other target detection devices can be sent preferentially, and each target detection device , new point data can be efficiently acquired and stored. In addition, new data on the registration date is likely to be more useful information, such as the vehicle speed measurement device that is currently performing speed measurement processing, so from that point of view, new data based on the registration date is also likely to be useful. It is preferable to send it from

Also, once all applicable point data has been sent, you can send it again from the beginning, or expand the area to be sent (areas outside 2km from the current location, 2 to 5km from the current location). etc.) Point data belonging to the expanded area may be transmitted. Furthermore, if there is no point data existing within the above 2 km area, the transmission process may not be performed, the area may be expanded and the relevant point data may be extracted again, or all points may be It is also possible to send data. In this case, there is often multiple point data, but the point data to be sent can be prioritized in various ways, such as in the order of the newest registration date, or in the order of the closest to the current location, as described above. This method can be adopted. In this embodiment, the corresponding point data is repeatedly transmitted without expanding the area within 2 km.

Furthermore, the point data may be transmitted alone or together with the own vehicle position information. In this embodiment, the information is transmitted together with the own vehicle position information. In other words, point data is transmitted to the surrounding area at regular intervals, similar to the own vehicle position information. Of course, when the vehicle position information is received from another target object detection device, the process of transmitting the point data held by the vehicle may be started immediately.

In the present embodiment, the point data is transmitted during a period when other target object detection devices are present in the vicinity. Specifically, the control unit 18 stops transmitting point data when it becomes unable to receive vehicle position information from other target detection devices for a certain period of time (for example, one minute). In this embodiment, since the point data and the vehicle position information are transmitted as a pair, if the vehicle position information cannot be received from another target object detection device for a certain period of time as described above, , and then repeats sending only the own vehicle position information.

FIG. 2 shows an example of an algorithm for realizing a transmission function including the above-described point data transmission function and own vehicle position information transmission function. In this example, point data is transmitted in pairs with own vehicle position information. If the own vehicle position information is transmitted at a predetermined timing (S1), a first timer (built in the control unit 18) for recognizing the transmission cycle is restarted (S2). Then, it waits for the own vehicle position information sent from other target object detection devices to be received (S3, S4). When the first timer times out (5 seconds have elapsed) and the information is not received, the process returns to step S1 and the own vehicle position information is transmitted. In reality, the control unit 18 passes the own vehicle position information along with the transmission request to the wireless transmitting/receiving unit 13, and the wireless transmitting/receiving unit 13 performs the wireless transmission.

On the other hand, if the own vehicle position information is received from another target detection device (Yes in S3), the control unit 18 starts the second timer and accesses the internal non-volatile memory 17 to determine the current position. It is determined whether point data exists in the vicinity (for example, within 2 km) (S6). If it exists, point data to be transmitted is read out from it (S7). That is, the number of point data to be transmitted at one time is 1, and if there is a plurality of nearby point data, they are read out one by one in order from the newest registration date. The items of point data read here are at least the unit ID and position information.

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

After executing these processing steps S8/S9, it waits to receive vehicle position information (point data may be added) from other target object detection devices (S10, S11). If received (Yes in S10), the process returns to step S5, the second timer is restarted, and the point data transmission process from S6 onwards is executed. Furthermore, if the second timer times out (for example, one minute has passed), it can be determined that there are no other target object detection devices in the vicinity, and the process returns to processing step S1 to collect only the normal own vehicle position information. Return to sending.

*Point data reception function When the control unit 18 receives point data sent from another target object detection device, it registers it in the point data storage area of the internal nonvolatile memory 17. At this time, it is easily expected that point data based on the same generation factor (microwave transmission source) will be notified from multiple different target detection devices, and point data that has already been registered automatically or manually. It is also expected that point data regarding the same target (microwave source) as the registered point data based on reception from other target detection devices may be received. At this time, it is expected that the latitude and longitude information of each point data will almost never be exactly the same, and will often be at slightly different positions.

Therefore, in this embodiment, the control unit 18 is equipped with a point data receiving function that performs the processing shown in FIG. That is, it waits to receive point data from other target object detection devices (S15). When the point data is received, the control unit 18 searches for existing point data registered in the internal non-volatile memory 17 using the latitude and longitude information of the received point data as a key, and searches for existing point data registered in the internal non-volatile memory 17. It is determined whether there is point data that is estimated to be an object (occurrence factor) (S16). As a condition for estimating that the objects are the same target, all points within a radius of 500 m around the latitude and longitude information of the already registered point data are considered to be the same. Therefore, the distance between the position specified by the latitude and longitude information of the received point data and the registered position is calculated, and if the calculated value is 500 m or less, they are the same, that is, the branch judgment in S16 is Yes. shall be. In this embodiment, the condition for determining whether two lines are the same in the branch judgment in step S16 is within a radius of 500 m, but the numerical value can be changed arbitrarily.

If there is already registered point data (S16=Yes), the point data received this time will not be registered, so the process returns to step S15 and waits for the next point data to be received. Note that although the registration process as new point data is not performed, it is preferable to perform the reliability update process as described later. Furthermore, if there is no registered point data (S16=No), the control unit 18 registers the point data received this time in the internal nonvolatile memory 17 (S17). At this time, if reliability is included as a point data transmission item, the received reliability is registered, and if reliability is not included, the reliability is set to a reference value = 1. .

In this way, by not registering point data that is considered to be the same, more points may be added than necessary, resulting in frequent alarms, or the number of points displayed on the display may increase unexpectedly. This can prevent it from becoming difficult.

Furthermore, in this embodiment, received point data is discarded without being registered if it is deemed to be the same, but for example, the location information may be added and stored in association with already registered point data. You can do it like this. As a result, there is a plurality of position information regarding one target object to be detected. At the time of warning, an alarm is issued when the position of the point data and the current position of the vehicle have a predetermined positional relationship.The position of the point data at this time is calculated from multiple position information registered in the point data. The determined representative position can be used. This representative position can be calculated geometrically, for example by finding the centroid/center position of multiple position information and using that position as the representative position, or by finding the representative position from the bias of the positions. I can do it.

Furthermore, in this embodiment, position information of point data is registered, and an alarm is issued when the point data is located within a predetermined distance (area) around the position information. In other words, the warning area was set within a predetermined radius. However, the present invention is not limited to this, and the warning area may be defined as an oval, a rectangle, or any other predetermined geometric expression format, and a warning may be issued when the own vehicle is within the warning area. good.

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

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

This target icon Tn is shown in a predetermined shape such as a circle, a square, or a star. Further, it is preferable to change the color and size depending on the type of target object. The more important the item, the larger it is, or the more prominent it is. Further, among the target icons Tn, there are a warning target icon indicating a target that is a warning target and a non-warning target icon indicating a target that is not a warning target based on the positional relationship with the own vehicle. Here, the warning target is a target located in front of the direction of travel of the own vehicle (±90 degrees from the direction of travel), and for targets with a warning angle such as a speed measurement device that emits microwaves, the target is also a target for warning. The condition is within the angle (target alarm angle ±40°). In the case of an icon that is not subject to a warning, its shape is a small circle or its display color is gray.

Further, the display screen in the display area is displayed with the direction of travel of the own vehicle viewed upward. This is done by the control unit 18 determining the traveling direction of the own vehicle based on the position information of the own vehicle given from the GPS receiving unit 12, and determining the position of each target object with the traveling direction facing upward. This can be handled by displaying items that exist within the display area at the appropriate positions.

In the illustrated example, the entire circle centered on the own vehicle progress icon I0 is displayed in the display area of the display unit 15, but for example, the own vehicle progress icon I0 may be positioned on the lower side of 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 own vehicle position information and the position information of the point data, and if the point data exists within a circular area within a predetermined radius centered on the own vehicle position, the control unit 18 moves the point data to the corresponding position. Display target icons corresponding to point data.

*Other vehicle position display function As described above, in this embodiment, each target detection device periodically transmits its own vehicle position information, and the own vehicle position information transmitted from other target detection devices By receiving the information, it is recognized that other target detection devices exist in the surrounding area.

Therefore, the control unit 18 added another target detection device as one of the items (elements) displayed on the display unit 15. As a result, when the display mode of the display unit 15 is to mark and display targets existing around the own vehicle, and when another target detecting device exists within the display area, A target icon (mark) indicating a "vehicle equipped with a target object detection device" is displayed at the relevant position.

By doing so, the marks indicating the own vehicle and the other vehicle are displayed on the same display screen, and the mutual positional relationship can be confirmed on the display screen. As a result, the user can experience that the system is operating normally. Also, if a target icon indicating a point is displayed while a mark indicating another vehicle is displayed, it means that point data is not registered for either your own vehicle or the other vehicle. It can be seen that there is a high probability that there is no occurrence factor for registering point data.

Next, each of the above functions will be explained using specific examples. As shown in FIG. 5, one vehicle is equipped with unit A (ID=A), which is a target detection device, and another vehicle is equipped with unit B (ID=B), which is another target detection device. Assume that the vehicle is traveling along a predetermined trajectory and gradually approaches the vehicle. As shown in FIG. 6, the current position information of the own vehicle equipped with the target object detection device with ID=A changes as it travels, so the own vehicle position information is updated periodically (every 5 seconds). The own vehicle position information is transmitted. If there is no other target detection device in the vicinity, the vehicle position information from the other target detection device is not received, so the control unit 18 updates the vehicle position information stored in the memory and updates the vehicle position information stored in the memory. The process of transmitting updated own 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 and the distance between them becomes less than a certain distance, the target detection device with ID=B The target object detection device with ID=A can receive the transmitted own vehicle position information. Then, the control unit 18 displays a target icon (symbol B in FIG. 7) corresponding to the target object detection device with ID=B based on the received vehicle position information with ID=B.

Further, when the control unit 18 recognizes the presence of the device that receives the own vehicle position information from another target object detection device (ID=B), the control unit 18 accesses the internal non-volatile memory 17 and based on the own vehicle position information stored by the control unit 18, If there is a point held within 2km from the current location (in the example in the figure, "point Point data regarding point X is transmitted in combination with vehicle position information.

Although not shown, when the target object detection device with ID=B receives the transmitted point register in sexual memory. If the point data for point X is not registered, the target object detection device with ID=B newly registers the point data for point If this happens, a warning can be issued based on location information. In other words, for the target object detection device with ID=B, point X can issue a warning based on position information in advance without ever receiving microwaves.

Further, as the target object detection device with ID=A moves, the range within 2 km changes, and the points belonging to that range also change, so the content of the point transmission is also changed as the device moves. If there are multiple points, for example, store the multiple point data in a temporary memory such as a buffer, associate the sent flag, and select the one with the most recent registration date as described above. Once sent, set the sent flag. Then, at the next time of transmission, the one with the latest registration date is selected from those without the sent flag set and sent. Further, at this time, if the range within 2 km is changed and point data to be added or deleted from the temporary memory is generated accordingly, update processing for such additions and deletions is performed.

Once the control unit 18 receives the vehicle position information of another target detection device and starts transmitting the point data it owns, the control unit 18 temporarily transmits the vehicle position information of the other target detection device. Continue sending point data even if it becomes impossible to receive point data. This is because even if there are other target detection devices in the vicinity, there is a possibility that the vehicle position information of the other target detection devices cannot be received due to communication failure or a busy state. If the own vehicle position information cannot be received for a certain period of time (for example, 1 minute), it is determined that the other target detection device has left the vehicle, and the control unit 18 receives only the own vehicle position information. Switch to transmission (end point data transmission). Additionally, in conjunction with this, the target icon indicating the target object detection device with ID=B is erased (not displayed) from the display area of the display unit 15.

* Point data reliability update function As described above, at least when registering point data automatically or manually, the reliability is set to a standard value of 1 as an initial value. In this way, point data that is considered to be the same point as the winning point data may be transmitted from one or more other target object detection devices. When point data for the same point is received from different target object detection devices, it can be said that the reliability of the point data is high.

Therefore, it is preferable to add a reliability update function as shown in FIG. 9 to the control unit 18. The flowchart shown in FIG. 9 is based on the reception function shown in FIG. 3, and processing steps S18 and S19 are added. The processing steps S18 and S19 can be considered as a reliability update function, and the flowchart shown in FIG. 9 may be regarded as a reception function with a reliability update function.

Specifically, it waits for point data to be received (S15), and determines whether point data that is estimated to be the same target (occurrence factor) as the received point data has already been registered (S16). . If registered (S16=Yes), the control unit 18 determines whether the point data is from a new target detection device (S18), and if it is new, stores it in point data that is considered to be the same. The current 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 object detection device can be determined using additional information. That is, if the unit ID is registered as additional information, it can be determined that the point data is new if the unit ID of the current point data is not registered as additional information. In addition, if location information is registered as additional information and no identical location information is registered, it can be determined that the item is new. This is because there is little possibility that position information registered by different target object detection devices will be exactly the same.

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

In this way, if S16 is No, neither automatic registration nor manual registration is performed (point data is not registered in the target object detection device itself), and point data is not notified from another target object detection device. This is the case when receiving. After being registered, the point data registered in response to a notification from another target object detection device becomes the registered point data to be compared when making a branch judgment in processing step S16. Therefore, after this registration, if point data that seems to be the same target is newly received from another target detection device, the branch judgment in step S16 is Yes, and the branch judgment in S18 is that point data that is newly received is received. It is determined whether the target object detection device that registered the point data is different from the target object detection device that first registered the already registered point data. If this judgment is Yes, point data registered with different target detection devices will be received for the same target (point), and the point data will be received from only one target detection device. It can be said to be highly reliable and increases the reliability.

In other words, the point data registered by automatic registration or manual registration and the received point data registered by another target detection device may be point data about the same target, or point data from multiple separate target detection devices. If the received point data is about the same target object (from different sources), there is a high possibility that the target object corresponding to the point data is the detection target object. The reliability was increased each time.

FIG. 10 shows the reliability update function when point data is first registered by reception from another target object detection device, and then the point data is attempted to be registered automatically or manually by the device itself. When the control unit 18 detects microwaves that meet predetermined conditions (Yes in S21), it attempts to register point data, but at this time, it determines whether or not it has already been registered as point data ( S22). This judgment is made by comparing the position registered as point data with the current position, and if the two are within a certain distance, it is determined that they are the same target, and the It is determined that it has been registered. If it is registered, the control unit 18 checks the unit ID stored in the point data and determines whether it is its own unit ID (S23). If it is registered due to reception from another target detection device (No in S23), since the unit ID is stored with an ID other than the unit ID, it can be determined that the unit is detecting the point for the first time, so the reliability is updated. (+1 increment). On the other hand, if the unit ID is one's own (Yes in S23), the reliability registered by oneself in the past is not updated. Note that if the branch judgment in S22 is No, the point data is new, so a registration process is performed (S25).

Furthermore, as another reliability update function, reliability information is added to the point data, and the target object detection device on the transmitting side transmits its "self" unit ID and point data, and the target object detection device on the receiving side The device has already registered point data in the point data storage unit about a point that can be considered the same as the point that specifies the alarm target corresponding to the received position information, and the device stores the unit ID of the point received this time and the point data stored in the storage unit. If the unit ID is different from the unit ID, the reliability may be increased.

In other words, when position information of a point that can be considered to be the same is received from multiple target detection devices, its reliability is higher than when notification is received from only one target detection device. However, the higher the number, the higher the reliability. Therefore, the reliability may be increased (incremented by +1) each time point data of points that can be considered to be the same from different unit IDs is received. Of course, the same point data may be received multiple times from the same target detection device, but in that case, if it is recognized that the unit ID is the same by comparing it with the unit ID associated with the point data received in the past, , the reliability of the point data will not be increased (update processing) upon reception of the current point data.

In addition, point data received from another target detection device is not necessarily automatically or manually registered by the target detection device that sent it, and may be sent from another target detection device. It may be point data that has been received and registered, or it may be point data that has been transmitted by the user in the past. Therefore, as described above, if the reliability is determined simply based on the difference between the unit IDs of the transmission sources, a situation may arise in which all the initially registered target object detection devices (creation sources) are the same. In such a case, even if the point data is received from a plurality of target object detection devices, it can be determined that the reliability is lower than when all of the point data are created by different sources. Therefore, even if the unit IDs are different, if the latitude and longitude are exactly the same, it is preferable to assume that the creator is the same and do not perform update processing to increase reliability. At this time, it is more preferable to take into account the registration date information, and if the latitude, longitude, and registration date are exactly the same, it is assumed that the creator is the same and the update process is not performed. This is because even if point data is registered using different target object 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 with a simple process, the determination may be made based on the sender's unit ID (without using latitude, longitude, etc.) as described above.

By using these reliability update functions, for example, when point X is already registered as point data as shown in FIG. 11(a), point Y (FIG. 11(b) )), since Y is not within 500 meters of X, it is recognized as different and is added as point data, as well as displayed as a target icon Tn. On the other hand, as shown in FIG. 11(c), if point Z is received from another target detection device, since Z is within 500m of X, it is determined that they are the same, and a new Although no point data is registered, the reliability of the originally registered point data regarding X becomes higher.

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

On the other hand, if you happen to be measuring speed at a certain location and registering point data at that time, the number of registered point data will increase and alarms based on that point data will occur frequently. Furthermore, even if there are many alarms, if they are often unrelated (there is no target to be detected), the user's attention may be distracted and undesirable results may occur.

Therefore, in this 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 obtained from the GPS signal), and assigns a lifespan to the point data as shown below. and change the content of the warning.
Date the current date and time was registered: Alert as today's points Within 2 weeks since registration: Alert as recent points Within 1 month since registration: Alert as points within the past month Within 2 months since registration: Past Alert for points within 2 months. Within 3 months after registration: Alert for points within the past 3 months. 3 months have passed since registration: No alert.

The above-mentioned warning can be notified by voice, and when outputted to the display unit, various forms can be taken such as outputting it as a message or displaying it in a different color or size.

*Additional information addition function for existing targets In the internal non-volatile memory 17, areas where speed measurements are regularly and frequently performed using a mobile speed measuring device are registered based on sighting information, etc. 18 may have a function of issuing a predetermined warning if the vehicle approaches the area. If such a function is provided, when a request to add new point data occurs due to a notification from oneself or another person, it will be possible to check whether the point data corresponds to the above region based on the location information of the point data. If this is recognized, the detection record will be added to the area as additional information. When this detection record is added, it is possible to give a more reliable warning (notification by adding additional information in the form of voice, etc.). Thereby, it is possible to issue a warning that takes reliability into consideration without additionally registering point data.

*Point alarm function In the case of point data, it is difficult to add azimuth information (microwave emission direction, etc.). Therefore, we made the warning range wider than normal. For example, as shown in FIG. 12, if the vehicle enters within 1100 m around the point data position (approaching the center position), a 1 km warning will be issued, and if the vehicle enters within 600 m, a 500 m warning will be issued. Once the vehicle has entered the 500m range (approaching the center position), a departure notification will be made when the vehicle leaves the 1100m range.

*Communication specifications By the way, the target object detection device 10 periodically transmits own vehicle position information (some of which includes point data). Therefore, if the transmission interval of each target object detection device 10 is set to exactly the same value (5 seconds), multiple (two in the figure) target detection devices will be transmitted at almost the same timing, as shown in FIG. When carrier sense is started, since vehicle position information is not being transmitted from other target detection devices at that time, there is a possibility that there is no carrier and the process of starting transmission at the same time is repeated endlessly. There is. Then, since the data are transmitted at the same time, there is a problem that data cannot be exchanged between the target object detection devices 10.

Therefore, the transmission intervals (transmission periods) of each target object detection device 10 are spread by random numbers within a certain range based on a reference value (for example, 5 seconds). This prevents the transmission cycles of each target object detection device 10 from becoming the same forever, and as shown in FIG. 13(b), even if the carrier sense and transmission timings match at a certain point At another point in time, the timing of the carrier sense is shifted, and it is possible to receive the own vehicle position information transmitted from the other target object detection device.

Furthermore, the wireless transmitting/receiving unit 13 is always performing a receiving operation for frame synchronization search except when transmitting. Then, the control unit 18 sends a transmission request to the wireless transmitting/receiving unit 13 when the transmission cycle is reached. Upon receiving the transmission request, the wireless transmitting/receiving unit 13 determines whether transmission is currently possible (no carrier), and if transmission is possible without a carrier, accepts the transmission request, performs transmission processing, and performs reception etc. In this case, the transmission request is rejected because it cannot be transmitted. If there are multiple (many) target object detection devices in the vicinity, there is a risk that transmission will start all at once the moment there is no carrier, resulting in a communication error. Therefore, preferably, the waiting time (offset) from the end of reception to the start time of the next transmission is set to a different value for each target detection device, so that transmission is performed from any one of the target detection devices. It's good to do that. As a method of making this offset different, there is a method of changing it each time using a random number or the like. In this way, it is possible to suppress the possibility that the offsets of a plurality of target object detection devices existing in the vicinity will be the same each time. Furthermore, the products are divided into groups using the last one or two digits of the serial number, and a different offset is set for each group. Even in this case, the possibility that a plurality of target object detection devices existing in the vicinity belong to the same group is reduced.

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

Claims (4)

A device that performs control to issue an alarm based on positional information of a vehicle speed measuring device stored in a storage unit that stores positional information of a vehicle speed measuring device that emits microwaves that meet predetermined conditions,
A function to detect the position of your vehicle,
a function that performs control to issue an alarm when the positional information indicating the position of the own vehicle and the positional information of any of the vehicle speed measuring devices stored in the storage unit have a predetermined positional relationship;
a function of receiving the microwave;
a function of determining that the microwave is from a malfunction source when the microwave is received at the same point or within the same area on a plurality of different days;
A device with a function of storing position information of the vehicle speed measuring device in the storage unit based on position information indicating the position of the own vehicle when the microwave is received;
a function that prohibits position information determined to be microwaves from the malfunction source from being automatically registered in the storage unit;
2. The device of claim 1. The device according to claim 1 or 2, having a function of extracting position information of the vehicle speed measuring device existing in a predetermined area from the position information of the own vehicle and transmitting the extracted position information. A program for causing a computer to implement the functions of the device according to any one of claims 1 to 3.

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