JP5228946B2 - Electronic equipment and programs - Google Patents

Description

  The present invention relates to a target detection device that detects surrounding targets based on the current position of a vehicle, and an electronic apparatus and program having GPS and other position detection functions such as a navigation device, and more specifically. In addition, the present invention relates to storage of dynamic data (position data updated after product shipment) including position information stored and held in an electronic device and improvement of reading and writing.

  Stores and holds position information of a target to be detected by a vehicle speed measuring device or the like, and issues an alarm when the current position of the vehicle detected by GPS and the position of the target are in a predetermined positional relationship. There is a target detection device as described above (for example, Patent Document 1). In the case of the target detection apparatus described in Patent Document 1 above, for example, when the detection target and the current position of the vehicle reach a set distance (for example, 1 km, 500 m, etc.), “500 m ahead, XX. (XX indicates that an alarm by voice such as information (loop coil or the like) for specifying a target is output, or the information on the display is output and displayed as text.

  These target detection devices, for example, inform the driver of the approach to the vehicle speed measurement device, thereby contributing to preventing the driver from unintentionally overspeeding. In particular, since the vehicle speed measuring device is generally installed in a place where the speed is likely to be exceeded, it is possible to alert the driver to the overspeed in a dangerous place. .

  And in order to perform a correct alarm operation, the information about the target object needs to match the actual installation situation. Therefore, although the position information of the target is registered in advance at the time of shipment, it can be updated by various known methods. By this update operation, the latest data can be obtained, and the accuracy of the alarm operation is improved.

  On the other hand, there is a vehicle speed measuring device that is one of the targets that emits microwaves of a predetermined frequency. Therefore, in addition to the position information, a microwave receiver is provided, and when a microwave of a predetermined frequency is received (other conditions may be added), a target is recognized and a predetermined alarm is issued. Some target detection devices have a function. The predetermined frequency is, for example, the same as the frequency of the microwave emitted from the human sensor of the automatic door. There is a risk of issuing an alarm. Therefore, in order to prevent the occurrence of such a situation, the position information of the malfunctioning source such as the automatic door is registered, and if a microwave of a predetermined frequency is received around the malfunctioning source position, an alarm is issued. There is something that does not emit (no regular alarm). In this case, it is necessary to register the position information of the malfunction source. When the user gives a registration instruction by operating the switch when an alarm based on reception of microwaves is actually issued, The position information when the instruction is received is registered as the position information of the malfunction source. Then, a range within a certain range around the position of the malfunction source is set as a warning prohibition area due to the malfunction source. In addition, some of them have a function of determining whether or not the microwave is from a malfunctioning source and automatically registering it.

  On the other hand, it is not necessary to issue a warning at a well-known place such as the vicinity of the house. Therefore, the detection operation of the target may be stopped by operating the switch in the vicinity of the home, but when moving from the periphery of the home to the outside, the target is detected by operating the switch near the boundary of the periphery of the home. Since it is necessary to switch the stop / operation of the detection operation, it becomes complicated. Therefore, the position information of the representative point of the place where the operation around the home or the like may be stopped is registered, and the range of the predetermined distance around the representative point is set as the alarm prohibition region. In these alarm prohibition areas, normal alarm operation is prohibited. Specifically, the target detection process itself is stopped, the reception sensitivity is lowered, or the type of alarm is changed.

  In this way, with use, location information for suppressing malfunction sources and regular alarms such as around the home are sequentially registered, but such location information (types of malfunction sources, around the home, etc. are also associated) Are registered in a non-volatile memory (for example, EEPROM). In addition, in the present specification, “dynamic data” is used because the data for detection of a target is sequentially updated and the stored contents are changed by automatic or manual registration / deletion after the product is shipped. Also referred to.

Utility model registration No. 3070388

  As described above, a system for changing data for detecting a target (dynamic data) by automatic or manual registration / deletion after product shipment has been conventionally realized. However, this type of conventional apparatus has the following problems.

  First, as described above, an EEPROM is used as a storage base for storing such dynamic data. For this reason, even if the capability of the MPU increases, the processing speed for access / read / write cannot be increased, which has become a system bottleneck. In order to solve this problem, a system that completely mirrors from the EEPROM-only system to the RAM has also been proposed, but it can be realized while the number of registered dynamic data is small. For example, the number of registered data is 10,000 or more. If the amount is too large, the amount of RAM used will increase explosively, and there is a problem that it is not suitable for a low-cost system. Further, assuming the number of registrations of 10,000 or more as described above, the conventional method using only the EEPROM has the same problem that the cost is increased as well as the problem of the processing speed.

  Therefore, when registering location information of malfunction sources, an upper limit is set in advance on the number of registrations, and if the upper limit is exceeded, location information of malfunction sources registered according to a predetermined rule is deleted and a new malfunction source Location information is registered. For example, the predetermined rule may be the one with the smallest passage history or the one with the oldest registration date (last passage date), but the one that matches the upper limit such as the one with the smallest passage history is not necessarily required ( It is not necessarily less important), and it is necessary to further record information for selecting data to be deleted (passage history, etc.) and to select data to be deleted from the information. Processing burden increases. In particular, if it has a function to automatically register its position information when it is determined that a microwave from a malfunctioning source has been received, there are many malfunctioning sources such as automatic doors in the town. Since data to be newly registered increases, for example, when the upper limit is set to about 100 to several hundreds, the upper limit is reached immediately, and there is a problem that the above-described problem occurs because deletion processing is required.

  Furthermore, the above dynamic data is not used by a single target detection device, but is considered to mutually use dynamic data registered by a target detection device mounted on another vehicle. Yes. As a result, even if the vehicle is the first time to visit, it can exist in that region by acquiring and using the dynamic data registered by the target detection device mounted on another vehicle that has traveled in that region. Even if a microwave from a malfunctioning source is received, it is preferable because an effect of suppressing normal alarm generation from the beginning (first reception) can be obtained. However, when dynamic data registered with other target detection devices is also acquired, the number of registered dynamic data increases dramatically, so the upper limit of the number of registrations so far is not sufficient. For example, it is required that 10,000 or more dynamic data can be stored.

  Further, in order to determine whether or not the microwave is received from a registered malfunction source, the position information of the registered malfunction source is searched, and the current vehicle position is an alarm suppression area due to the malfunction source. It is necessary to judge whether it is within or not. If the number of registrations of malfunction sources is about 100, there is no problem in processing time and load even if all the data are searched in order from the beginning. However, as the number of registrations increases as described above, A new problem arises that it is necessary to suppress the influence on the processing time and load by a typical search system.

  In order to solve the above-described problems, the present invention includes (1) a position detection unit that detects the position of the device itself, and a dynamic data storage unit that registers dynamic data including position information after product shipment. Dynamic data storage means for registering dynamic data including position information to be registered after product shipment, the current position detected by the position detection means, and the dynamic data stored in the dynamic data storage means When the dynamic data to be registered is registered in the dynamic data storage means when the dynamic data registration target area is divided into a plurality of areas. A corresponding area is determined from among the plurality of areas from the position information of the dynamic data, and in the case of the first dynamic data in the determined area, a box which is a continuous memory area of a set size The Secure in the dynamic data storage means, store the dynamic data in the box, and store the dynamic data in the box when the box is reserved for the determined area A control means is provided.

  Various areas such as the whole world, the whole country, and a specific part of the area can be set as registration areas. In the embodiment, since it is divided by longitude, the whole world is targeted. As the position detection means, for example, a technique for detecting the current position using GPS, wireless LAN, RFID, or the like can be used. Electronic devices include target detection devices that detect surrounding targets based on the current position, and various devices that have a position detection function using GPS, such as a navigation system. As the predetermined control, when the electronic device has a function of issuing an alarm based on position information, there is an apparatus that controls the alarm (in the embodiment, suppression of a normal alarm). Other examples of the predetermined control include information input control, output control, and recording control. For example, as output control, signal control to other devices or the like, notification control (for example, notification of facility position), or the like can be used. Examples of the recording control include recording control of information (for example, video) at the current position. Of course, other controls may be used.

  In the present invention, a memory area (box) that is divided into a plurality of areas and is contiguous with a predetermined size is secured for each area. Therefore, when registering certain dynamic data, which area is determined from the position information of the registered data. Is registered in the memory area allocated to the corresponding area. Therefore, at the time of searching, it is only necessary to recognize the corresponding area from the current position and search only the memory area (box) allocated to the area, so that the presence or absence of the corresponding dynamic data can be determined in a short time. . In addition, since the memory area is secured for the actual dynamic data storage means only when dynamic data to be registered is generated, an unused memory area is not secured unnecessarily.

  (2) If the number of pieces of dynamic data that can be registered is stored in the box reserved for the determined area, the control means reserves a new box for the area, and the new box The dynamic data may be stored in the inside. By doing so, it is not necessary to increase the size allocated to each area more than necessary, so that the memory can be used effectively. That is, as described above, when dynamic data to be registered for an area is generated, a box (continuous memory area) for the area is secured in the dynamic data storage unit. Therefore, if the size is set larger than necessary and the number of dynamic data to be actually registered is small, it is not preferable because many unused memory areas are generated in the box. On the other hand, if the size is too small, it will fill up quickly, and if you cannot register any more (or delete the already registered dynamic data and add a new one), you will not be able to register the dynamic data properly. However, according to the present invention, when a box becomes full, a new box can be secured and new dynamic data can be registered there.

  (3) The set size is a fixed size set in stages, and a larger fixed size may be assigned to an area where the expected number of registered dynamic data is larger. If this is done, the size of each box will be appropriate, the size will be set larger than necessary, and the unused memory area in the box will increase, and conversely, the number of registered dynamic data will be allowed by size immediately. It is possible to prevent the maximum value from being reached. In the embodiment, the expected number of registrations is allocated according to the number of registrations of the target. However, the present invention is not limited to this, and can be allocated based on, for example, population density and other conditions.

  (4) An alarm control unit that issues an alarm when a predetermined radio wave is received may be provided, and the dynamic data may be information specifying a range in which a normal alarm performed by the alarm control unit is suppressed. As shown in the embodiment, the range for suppressing regular alarms is to generate alarms around malfunction sources that generate radio waves in the same frequency band as the radio waves emitted from the detection target, around the user's home, and where they often go There is a range where the necessity to do is low.

  (5) The dynamic data may include data obtained by acquiring dynamic data registered in another electronic device. Dynamic data registered with other electronic devices can be obtained in the city, and by registering it with your own device, you can obtain dynamic data of places you have not actually visited in advance. By using dynamic data, appropriate control can be performed from the beginning. As means for acquiring dynamic data, portable recording media such as various two-memory cards can be used, or communication can be used.

  (6) The dynamic data storage means may use a flash memory. This is preferable because the memory capacity can be secured at low cost.

  (7) The control unit prepares a plurality of data planes and registers the dynamic data in the flash memory on the data plane that is used, and valid / invalid marking for each dynamic data. The registered dynamic data is deleted by invalidating the corresponding valid / invalid marking. If the deleted data on the used data surface exceeds the reference amount, the effective marking setting is set. It is preferable to provide a function of performing garbage collection processing for switching the used surface to the data surface to be the new usage surface after copying the dynamic data to the data surface to be the new usage surface. By doing so, it is possible to reduce the possibility of data being destroyed when the power is turned off during garbage collection. It should be noted that this is the timing for switching the usage plane when the deleted data exceeds the reference amount, but if it exceeds, it may be performed immediately or after a certain period of time, but more preferably, the embodiment As described in, this is to be done at the next start-up when there is time available.

  (8) As the valid / invalid marking, the value of the invalid marking may be set to 0 and the value of the effective marking may be set to other than 0. Since the flash memory can be easily set to 0, the registered dynamic data can be easily deleted.

  (9) Further, the garbage collection process may be performed during the drawing process of the opening screen on the display means immediately after the power of the own device is turned on. In this way, the garbage collection process can be performed at the time of start-up with sufficient time, and the influence on the actual detection operation and the like is small.

  (10) When the garbage collection process is performed, if all data in the same box disappears, a function of performing a process of deleting the box itself may be provided. By providing such a function, it is possible to release a box that is substantially unnecessary, and to increase an area for registering new dynamic data.

  (11) The program of the present invention can be a program for causing a computer to realize a function as a control means in the electronic device according to any one of (1) to (10).

  The present invention secures a box of continuous memory areas for each area, and dynamic data belonging to the same area is stored in the box, so the memory capacity of the dynamic data storage means is increased. However, when searching, it is only necessary to search the corresponding box, so that processing can be performed quickly. Further, instead of securing boxes corresponding to all areas in advance, when dynamic data to be registered is generated, a box of an appropriate size is secured in the corresponding area, so that the memory can be used effectively. Further, when a flash memory is used as the dynamic data storage means, the memory capacity can be increased at a low cost, and the number of items that can be registered can be increased.

It is a figure which shows suitable one Embodiment of this invention. It is a figure which shows an example of the data structure of flash memory. It is a figure which shows an example of the data structure of EEPROM.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a preferred embodiment of the present invention. As shown in FIG. 1, a GPS receiver 1 serving as a position detection unit, a microwave receiver 2, and a wireless receiver 3 are provided as receivers that receive various radio waves and the like. The GPS receiver 1 receives a GPS signal, obtains a current position from the received GPS signal, and sends position information (longitude, latitude) of the obtained current position to the control unit 4.

  The microwave receiver 2 receives microwaves in a predetermined frequency band, and detects the signal level of the received microwaves when receiving microwaves in the set frequency band. Specifically, the RSSI voltage corresponding to the signal level and the electric field strength is used. The predetermined frequency band is, for example, a frequency band including a microwave frequency emitted from the vehicle speed measuring device. The wireless receiver 3 receives incoming radio waves in a predetermined frequency band. For example, the predetermined frequency may be a radio frequency band used when the emergency vehicle notifies the base station of the vehicle position.

  The control unit 4 executes predetermined processing based on information input from the various receivers described above, and outputs predetermined alarms and messages using output devices (display unit 6, alarm lamp 7, speaker 8, etc.). Output. The predetermined process for determining the alarm content based on the information input from the receiver can use the same basic process as in the conventional technique. That is, when a signal having a certain condition is received / acquired, a corresponding alarm is output. Note that alarms using the speaker 8 include a buzzer and a voice.

  The alarm based on the position information (current position information of the host vehicle) detected by the GPS receiver 1 related to the present invention will be further described. In the database 5, the type of monitoring and the position information (longitude: latitude) of the target to be detected (traffic monitoring point such as a traffic monitoring device, facility or other target related to traffic such as a road station) Is stored as an associated table structure. Further, when the target has a monitoring direction / monitoring area as in the vehicle speed measuring device, information for specifying the monitoring area is registered in association with each other.

  Information regarding these targets is registered for certain targets at the time of shipment. This data can be updated by various known methods. The database 5 can be realized by a nonvolatile memory (for example, EEPROM) in the microcomputer of the control unit 4 or externally attached to the microcomputer.

  Further, the database 5 stores data on malfunction sources such as automatic doors that emit microwaves in the same frequency band as the microwaves emitted from the vehicle speed measuring device as one of the dynamic data. ing. This data includes a malfunction source and its position information. The alarm suppression area where the normal alarm is suppressed by the malfunction source is within a circle with a predetermined radius centered on the position of the malfunction source, or the microwave emitted from the malfunction source has its emission direction. Various methods such as a sector shape within a predetermined angular range on the left and right sides in the emission direction can be used. When changing the predetermined radius or shape for each malfunction source, store the information specified in association with the position information as information about the malfunction source, and when making the radius common to all malfunction sources Since the information to be shared does not need to be individually registered, only unique information such as position information is stored.

  This dynamic data is stored in the control unit 4 automatically when the microwave receiver 2 actually receives a microwave of a predetermined frequency band after the product is shipped, or manually according to a switch operation from the user. When it is determined and recognized as a malfunction source, the control unit 4 registers the current position of the vehicle at that time as position information of the malfunction source, and stores / updates it in the database 5. Note that a conventionally known technique can be used for a function of automatically determining and registering as a malfunction source when receiving a microwave, and thus a detailed description thereof will be omitted.

  The control unit 4 searches the database 5 based on the current position, determines whether there is a target object to be alarmed around it, and if the target is detected, information on the target is predetermined. Notification using the output device. When the microwave receiver 2 receives a microwave having a predetermined frequency or the wireless receiver 3 receives a predetermined radio signal, a corresponding alarm is issued.

  On the other hand, when the control unit 4 determines that the current position is within the alarm suppression region set around the malfunction source, the above setting is performed even if the microwave receiver 2 receives the microwave of the predetermined frequency. Control that does not issue a normal alarm. Here, not issuing a regular alarm includes not only the case where the alarm itself is not performed, but also the case where the method of the alarm is changed. In other words, if the normal alarm draws a symbol or message indicating the target on the display unit 6 or generates an audio alarm from the speaker 8, an alarm different from the normal alarm method is, for example, text. There are simple and minor warnings, such as changing only the message by, or changing the content of the message (a content that indicates that microwaves are being received within the warning suppression area). It is also possible to perform control that makes detection difficult by reducing the reception sensitivity of the microwave receiver 2 or increasing the threshold of the reception level when determining that it has been received.

  Here, in the present embodiment, the upper limit of the number of registrations of the dynamic data in the database 5 is set to a large value of 10,000 (or an appropriate value higher than that), and the number of registrations of the dynamic data is the upper limit in the normal use state. The occurrence of a situation in which registered data must be erased because of exceeding the limit is suppressed. Of course, the registered dynamic data may be deleted due to erroneous registration or unnecessary. As the number of items that can be registered increases, the processing time is reduced by an efficient search system, the processing load on the control unit 4 (MPU) is reduced, and the cost is further reduced. In order to realize the above, the following configuration was adopted.

  First, the database 5 was configured using two types of storage media, the flash memory 11 and the EEPROM 12. That is, the EEPROM 12 is used only for auxiliary purposes, and its memory capacity is reduced to reduce the cost, and dynamic data (location information, etc.) is stored in the large-capacity flash memory 11 having the highest capacity versus cost. Adopted structure. The flash memory 11 can be accessed at high speed, but the specific address cannot be changed to “arbitrary value” unlike the EEPROM 12. However, using the fact that “1” → “0” is always writable due to the characteristics of flash memory, dynamic data is changed / updated by repeating deletion and addition.

  In other words, as is well known, the flash memory 11 becomes “1” in ERASE, and “1” can be set to “0” at any time, but once “0” is written, it is returned unless ERASE occurs. Absent. Therefore, when adding data, it is performed by writing in an ERASEd area. In addition, valid / invalid marking is associated with the data storage area, and the data associated with the valid marking is determined to be valid as dynamic data. In addition, when invalid marking is registered, the data associated therewith is determined to be invalid, and therefore deleted. In other words, in order to delete the data once written, the valid / invalid marking may be changed to invalid marking. Therefore, for example, the valid marking is set to “0xA5”, the invalid marking is set to “0x00”, and the valid / invalid marking is rewritten by overwriting the invalid side. This valid / invalid marking is provided for each dynamic data. More specifically, each rightmost box (eg, group 100 data 0) in FIG. 2 is stored in that box.

  In addition, if deletion and addition are repeated as data is updated in this way, the deleted data imposes a capacity, and thus garbage collection is required. That is, once deleted, the area cannot be used as it is, but if it is repeatedly added / deleted, many areas cannot be used, and data cannot be added. Therefore, as shown in FIG. 2, two data surfaces (“flash surface 0” and “flash surface 1”) are prepared, and when a certain amount of deletion data is generated, a garbage collection request (defragment instruction) is sent to the EEPROM 12. After storing and erasing a surface that is not currently used at the next startup, valid data is copied and transferred. When the migration is complete, the garbage collection request in the EEPROM 12 is deleted. Immediately after startup, the garbage collection process (tidy process) described above is performed behind the process of displaying the opening screen etc. on the display unit 6 [0] Since there is a time allowance, this neat process takes about 10 seconds. There is no problem, and even if the power is cut off during the transition, there is no problem because it is only necessary to arrange again until completion.

  Whenever the dynamic data to be registered based on the malfunction source is detected in the flash memory 11 having a large memory capacity, simply adding the data sequentially from the head, the flash memory 11 is searched for data near the current position. It is necessary to check all registered data registered in the memory 11. This is not preferable because it is inefficient, takes time, and increases the load on the control unit 4.

  Therefore, the actual area is divided into a plurality of areas, and the memory area is allocated to each area. Thus, when registering certain dynamic data, the control unit 4 recognizes which area is dynamic data from the positional information of the registered data, and registers it in the memory area allocated to the corresponding area. The control unit 4 writes in order from the top in each memory area. In this way, at the time of searching, it is only necessary to recognize the corresponding area from the current position and search only the memory area allocated to the area, so it is possible to determine the presence or absence of the corresponding dynamic data in a short time. The load on the control unit 4 is also reduced.

  In this embodiment, each area is divided based on longitude. Specifically, since it was divided into 576, the width of one area was set to about 3 km. Furthermore, the memory capacity allocated to each area was made different depending on the situation. That is, assuming that the maximum number of registrations is 10,000, if the memory capacity (number of registrations) is equally allocated to each area, the number is about 17 from “10000/576”. Then, in an area where there are many registration targets such as a densely populated area, the number of registrations is too small, and the upper limit for immediate registration is exceeded.

Also, if there is a large number of people, there is a high possibility that a large number of dynamic data will be registered, so if you increase the memory capacity that is uniformly allocated to the area belonging to the city, it will be registered when local people use this time. The possible number will be even smaller. Therefore, in this embodiment, instead of securing a storage area for each area in the flash memory 11 in advance, when dynamic data to be registered is generated, a storage area having a size (memory capacity) allocated for the area is set. The dynamic data is registered in order from the top in the storage area. This storage area is referred to as a box (BOX), and the size of the box is changed according to the rank assigned to each area. In particular,
Rank 1 Box size = 8
Rank 2 Box size = 16
Rank 3 Box size = 32
Rank 4 Box size = 48
Rank 5 Box size = 64
Rank 6 Box size = 96
The 6 ranks were divided. The numerical value of the box size is the number of dynamic data that can be registered in the box. This rank may be stored as a table in the program for each group, or may be stored in the EEPROM 12.

  And this rank division is set to a higher rank as it becomes, for example, an urban area (city), and to a lower rank as it becomes a rural area. The degree of the city can be set according to the population density, for example. Further, although information regarding the target is registered in the database 5, ranking may be performed according to the number of targets registered in the same area. That is, a higher rank is set as the number of registered targets is larger. Here, the number of targets is not necessarily limited to that actually registered in the database 5, and data held by a manufacturer or the like may be used.

  By doing so, it is possible to prevent the memory area of the flash memory 11 from being reserved for an area that the user does not go to or an area where there is no dynamic data to be registered. In addition, once dynamic data to be registered is detected, a continuous memory area of a predetermined box size is secured for that area, and then another dynamic data is detected in the same area. In addition, it is possible to additionally register in the reserved box. Therefore, since dynamic data such as malfunction sources existing in the same area is stored in a box which is a continuous memory area, the vehicle actually exists in a predetermined area, and dynamic data such as malfunction sources is present. When determining the presence or absence of data, it is only necessary to search for a box corresponding to the area, so that processing can be performed quickly and easily.

  Furthermore, since the box size is set according to the rank, it is possible to suppress a substantial decrease in the maximum number of registrations due to securing more memory areas than necessary. If new dynamic data to be registered is generated when the allocated boxes are full, additional registration is performed without deleting the registered dynamic data by adding a new box. it can.

  An example of dynamic data registration (data structure) in the flash memory is shown in FIG. In this example, the flash area 0 is used as a memory area for storing dynamic data. The box size allocated to the area corresponding to the group number is a capacity that can store dynamic data of 8 groups 99, 8 groups 100, 16 groups 101, and 8 groups 200. The dynamic data registered in each box is eight in which the group 99 is set. Since the box is full, when new dynamic data in the area of the group 99 is generated next, A new box is secured and registered there. Also in this case, the box size of the secured box is the same (eight). For other boxes, since there are unused areas in the box, when new dynamic data to be registered is generated, it is registered in the corresponding box. Further, when dynamic data to be registered is generated for an area of another group, a box having an allocated box size is secured and the dynamic data is registered at the top of the box.

  Further, management information of data stored in the flash memory 11 is stored in the EEPROM 12. Specifically, as shown in FIG. 3, the number of boxes used (5 in the example of FIG. 2 from BOX 0 to 4), the selection surface (0 in the example of FIG. 2), the box number and the allocation to it. It adopts a data structure that stores a correspondence table (unused group number is 0), the number of registrations for each group, and a defragmentation instruction flag.

  When the number of registrations by group is 0, the dynamic data for the area of the group is not registered, and the box of the flash memory 11 is not secured. Also, if the number of registrations by group is the same or a multiple of the box size assigned to the group, it is necessary to secure a new box in order to register next when the secured box is full. I understand. Further, by looking at the group number stored in the above correspondence table, it is possible to determine whether or not it is an area where a box is already secured in the flash memory 11.

  For example, when dynamic data to be registered is detected, the control unit 4 determines which area (group number) belongs to the position information, searches the corresponding table from the top, and searches for the corresponding group. Determine if there is a number. The correspondence table is a table in which when dynamic data is registered in a predetermined box of the flash memory 11, the group number of the area to which the dynamic data belongs is registered in association with the box number of the box. If there is a group number in the correspondence table, there will be dynamic data already registered in the area of that group number (current position area), so that box number is acquired. Get the number. If there are a large number of dynamic data exceeding the number of items that can be registered in one box, there are a plurality of boxes storing dynamic data having the same groove number. Therefore, if there are a plurality of boxes, the last box number is acquired. Then, the control unit 4 performs dynamic data storage processing in the memory area of the flash memory 11 corresponding to the acquired box number.

  Specifically, if dynamic data already registered in the same area already exists, the dynamic data stored in the box is compared with the location information of the dynamic data to be registered this time, and the same location It is determined whether or not there is a registered one. If not, additional registration is performed. When there is no registered dynamic data in the same area, the control unit 4 secures a box of the box size set in the area in the flash memory 11 and dynamically at the head of the secured box. Register the data.

  Note that the number of boxes used, the selection surface, and the correspondence table are expanded in the RAM after the apparatus is started, read from the RAM, and written to the RAM and the EEPROM 12. Thereby, high-speed processing can be performed.

  When the registered dynamic data becomes unnecessary or is changed to other contents, the registered dynamic data is deleted (invalid marking). Therefore, as usage progresses, all data in the same box may be deleted. The deleted data itself is not copied to the flash surface that has been newly used by performing garbage collection processing (defragmentation), but the box itself remains. Such a box may be left as an area to be stored when dynamic data of an area (group) allocated to the box is generated, but when the garbage collection process is performed, the data in the same box is stored. If all of the boxes disappear, it is desirable to provide a function for performing processing for deleting the box itself. This can be realized by, for example, a process of decrementing the number of registrations by group. If it does in this way, it can control securing a box more than necessary.

  When using dynamic data during normal target detection processing, the control unit 4 recognizes the corresponding area (group number) based on the current position, and uses a correspondence table (actually, data developed in the RAM). ) To obtain the box number where the dynamic data for that area is registered, search the location information of the dynamic data stored in that box, determine whether the current location is an alarm prohibited area, In the case of an alarm prohibition area, a normal alarm is not generated even if a predetermined microwave is received. In addition, when the group number to be read is determined corresponding to the area at the current position when reading the above data, it is associated with the determined group number stored in the table of registered numbers by group. The number of registrations is read from the EEPROM 12, and data for the number of registrations is read. If the number of registered boxes does not reach the number of registrations, dynamic data has already been registered in that box, and another box is reserved. Read the data to be read. The search for the other box may be performed by searching all of the correspondence tables from the beginning and acquiring all the items matching the corresponding group number in advance when searching the correspondence table. In the first search, when one corresponding box is found, dynamic data is read based on that box, and the correspondence table is searched again when it is found that there is a shortage (there are other boxes). And you may make it acquire another box.

  In the above-described embodiment, the EEPROM 12 is used as the nonvolatile storage medium. However, an MRAM, FeRAM, or various recording media such as an SD card may be used. Further, as described above, the data to be added as dynamic data is not limited to data registered based on the current position information at the time of switch operation or the like during operation of the target object detection device. A removable storage medium such as the above may be mounted, data stored in the SD card may be read out and stored in the flash memory 11, and necessary management information may be stored in the EEPROM 12, or data may be captured by communication. .

  In this way, by transmitting and receiving dynamic data via an SD card or wireless communication, it is possible to capture and use dynamic data registered in another target detection apparatus. As a result, even at a place visited for the first time, by acquiring in advance dynamic data registered by another target detection device at the place, appropriate control based on the dynamic data from the beginning (regular alarm prohibition) Etc.).

  Furthermore, considering the cost, it is preferable to mount the flash memory 11 as described above and store the dynamic data in the flash memory 11 as described above, but to detect the data quickly while increasing the maximum number of registered dynamic data. In order to do this, instead of using the flash memory 11, an EEPROM may be used as in the prior art. Even in this case, if dynamic data to be registered is generated, if a box is actually secured for that area and dynamic data is stored, memory capacity is wasted for unnecessary areas that are not actually used. Since dynamic data existing in the same area is stored together in a box that is a continuous memory area, only the box corresponding to that area is searched when searching. Searching is sufficient, so it can be detected quickly.

  Furthermore, in the above-described embodiment, an example in which the present invention is applied to a target object detection device as one of in-vehicle devices that are examples of electronic devices has been described. However, the present invention is not limited to this, for example, in a car navigation device. Can also be applied. In the case of a navigation device, landmarks related to home, office, school and other users are registered as dynamic data. As a result, when the registered landmark exists around the current position (in the display area of the display screen), the landmark can be drawn on the map and can be registered by using the present embodiment mobile phone. You can increase the number of landmarks. Furthermore, it is not limited to in-vehicle devices other than in-vehicle devices, but is not limited to in-vehicle devices. Portable navigation devices that can receive GPS signals and perform various processes, GPS built-in cameras, GPS built-in videos The present invention can also be applied to position recording devices such as cameras and GPS loggers, GPS signal recording devices, and other GPS devices. Further, a device that uses GPS as a position detecting means is called a GPS device. For example, in addition to GPS, it can be applied to various electronic devices using technology for detecting the current position using a wireless LAN, RFID, or the like. Of course.

  In these electronic devices such as GPS devices, information input control, output control, recording control, and the like can be performed when the current position is within a range specified by dynamic data. As output control, signal control to other devices or the like, notification control (for example, notification of facility position), or the like can be used. The recording control includes, for example, recording control of information (for example, video) at the current position.

DESCRIPTION OF SYMBOLS 1 GPS receiver 2 Microwave receiver 3 Wireless receiver 4 Control part 5 Database 6 Display part 7 Lamp 8 Speaker 11 Flash memory 12 EEPROM

Claims (11)

Position detecting means for detecting the position of the own machine;
Dynamic data storage means for registering dynamic data including position information after product shipment;
With
A function of performing a predetermined control based on the current position detected by the position detection unit and the dynamic data stored in the dynamic data storage unit;
Dividing the area to be registered for the dynamic data into a plurality of areas;
When the dynamic data to be registered in the dynamic data storage means is generated, the corresponding area is determined from the plurality of areas from the position information of the dynamic data, and the first movement in the determined area is determined. In the case of target data, a box which is a continuous memory area of a set size is secured in the dynamic data storage means, the dynamic data is stored in the box, and the determined area is An electronic apparatus comprising control means for storing the dynamic data in a box when the box is secured.   When the number of dynamic data that can be registered is stored in the box reserved for the determined area, the control means reserves a new box for the area, and stores the new box in the new box. The electronic apparatus according to claim 1, wherein the electronic apparatus stores dynamic data.   3. The electronic apparatus according to claim 1, wherein the set size is a fixed size set in stages, and a larger fixed size is assigned to an area where the expected number of registrations of the dynamic data is larger. . Equipped with an alarm control means for issuing an alarm when a predetermined radio wave is received,
The electronic device according to any one of claims 1 to 3, wherein the dynamic data is information that specifies a range in which a normal alarm performed by the alarm control unit is suppressed.   The electronic device according to claim 1, wherein the dynamic data includes data obtained by acquiring dynamic data registered in another electronic device.   The electronic device according to claim 1, wherein the dynamic data storage unit is a flash memory. The control means includes
The registration of dynamic data in the flash memory is performed on the data surface that is used as well as preparing a plurality of data surfaces,
Set the valid / invalid marking for each dynamic data and delete the registered dynamic data by invalidating the corresponding valid / invalid marking,
When the deletion data of the data plane that is the usage plane exceeds the reference amount, after copying the dynamic data with valid markings to the data plane that becomes the new usage plane, the usage plane is used as the new usage plane. The electronic device according to claim 6, further comprising a garbage collection function for switching to a data surface to be a surface.   The electronic device according to claim 7, wherein the valid / invalid marking has an invalid marking value of 0 and a valid marking value other than 0. 9. The electronic apparatus according to claim 7, wherein the garbage collection processing is performed during drawing processing of the opening screen on the display unit immediately after the power of the own device is turned on. 10. The function according to claim 7, further comprising a function of deleting the box itself when all the data in the same box disappears when the garbage collection process is performed. Item 1. An electronic device according to item 1.   The program for making a computer implement | achieve the function as a control means in the electronic device in any one of Claims 1-10.

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