JP2813737B2 - Moving object position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention receives a radio wave of a GPS satellite on a mobile body, detects the current position of the mobile body from received information, and stores the data in a memory. The destination information is stored in, and from the current position and the destination information, relative position information such as the direction of the destination viewed from the moving body or the distance from the moving body to the destination is displayed on the moving body. The present invention relates to a navigation device on a moving object.

(Prior Art) A radio wave transmitted from a GPS satellite is received on a mobile object such as a car, the current position of the car is detected from the received information, the direction of the destination with respect to the traveling direction of the car is detected, and this is displayed on a display. (For example, Japanese Patent Application Laid-Open No. 58-26214). This type of moving object position display device is effective when traveling in an unfamiliar area or selecting a detour, because the direction in which the vehicle should travel is sequentially displayed.

However, there are cases where the information of the GPS satellites cannot be supplemented depending on the location where the car moves, and the current position may be unknown. In a general moving object position display device,
If the GPS satellite information cannot be supplemented, the operator is informed that the position is unknown by not displaying the destination information display, but the destination information is unknown at this point.
Accordingly, there has been proposed a device or the like that displays the destination information as it was when the measurement was possible, and separately displays that the current position is unknown.

(Problems to be Solved by the Invention) However, it is difficult to keep watching the navigation display on the moving object, and generally, the display is intermittent and instantaneous.

For this reason, when the position is unknown and the display is turned off,
If you do not remember the display information (position information) immediately before the display disappears, it will be difficult to estimate the current position until the position is obtained from the received radio wave. However, the display may disappear at any time. It is almost impossible to remember location information.

When the position is unknown, the position information captured immediately before the position is continuously displayed and the position unknown is separately displayed.If the display is not seen at the moment when the position becomes unknown, the information of the displayed destination is displayed. Is not known how long ago.

The present invention improves the above-described problem when relative position information such as the direction of a destination viewed from a mobile unit or the distance from the mobile unit to the destination becomes unknown due to poor reception of radio waves from a satellite or the like. The purpose is to: That is, it is an object of the present invention to facilitate recognition by the user that the relative position information has become unknown and subsequent estimation of the relative position by the user.

[Configuration of the invention]

(Means for Solving the Problems) A moving object position display device according to a first aspect of the present invention is a receiving means (1) on a moving object for receiving radio waves of a GPS satellite; a signal received by the receiving means (1). Current position detecting means (2) on the moving body for detecting the current position based on the current position; storage means (40) on the moving body for storing the destination; Destination direction detecting means (23) on the moving body for detecting a direction; destination direction displaying means (AR) on the moving body for displaying the detected destination direction; and receiving of the receiving means (1) When the information becomes defective, the destination direction indicating means (AR) is continuously displayed on the destination direction display means (AR) during the defect from that point of time and blinks, and the display is turned off when a predetermined time has elapsed from that point. Display control means (41);

A mobile object position display device according to a second aspect of the present invention receives a radio wave of a GPS satellite, receives means (1) on the mobile object; detects a current position based on a signal received by the receiving means (1); Current position detection means (2) on the mobile object; satellite reception state display (CD) for displaying the reception state of the radio wave received by reception means (1); if reception information of reception means (1) becomes defective. A display control means for causing the reception status display of the satellite reception status display unit (CD) to blink during the defect from the time and for displaying the reception failure on the satellite reception status display unit (CD) when a predetermined time has elapsed from the time. 41);

The symbols in parentheses are corresponding elements in the embodiments described later.

(Operation) According to the first aspect, when the reception information of the receiving means (1) becomes defective, the display control means (41) immediately transmits the information to the destination direction display means (AR) during the defect. Is displayed continuously and blinks, and disappears when a predetermined time has elapsed from the time. Therefore, when the reception becomes impossible or the destination direction cannot be detected, the destination direction display flashes for a predetermined time, and the user cannot detect the destination direction before the predetermined time even if the flashing is longer than the current time. thing,
In addition, it can be easily recognized that the destination direction immediately before the detection becomes impossible is displayed by blinking. This makes it relatively easy for the user to recognize that the destination direction has become unknown and to subsequently estimate the relative position of the user. In addition, since the user knows that the display will disappear after a predetermined time even if it is long, a countermeasure or intention can be taken corresponding to this.

According to the second aspect, when the reception information of the receiving means (1) becomes defective, the display control means (41) displays the reception state of the satellite reception state display section (CD) during the period from the point of the defect. It blinks, and when a predetermined time has elapsed from the time, the satellite reception status display section (CD) indicates that reception is impossible. Therefore, when reception becomes impossible, the satellite reception status display section (CD) flashes for a predetermined time, and the user becomes unreceivable before the predetermined time even if the flashing is longer than the current time, and the reception is disabled. It can be easily recognized that the reception status immediately before the current status is displayed by blinking. Also, since the user knows that a reception failure display will occur after a predetermined time even if it is long,
Countermeasures or intentions may be taken to address this.

As described above, the user does not need to constantly look at the display. If the user finds it during the blinking display, the user stops the moving body and re-recognizes the destination by referring to the surrounding environment or a map. Therefore, there is no need to operate the moving body while worrying about when the destination direction becomes unknown or when satellite reception becomes impossible.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Embodiment) FIG. 3 shows a configuration of a position display device for an automobile to which the present invention is applied. This device is mounted on an automobile. It includes an antenna 1, a GPS (Global Positioning System) integrated controller 2 (hereinafter, referred to as ECU), a display device 3, a display control unit 4, and a remote control unit 5 (hereinafter, referred to as remote control).

 Hereinafter, each unit will be described.

(1) Antenna 1: Antenna 1 is mounted on the outside of the car,
Receives radio waves from S satellite.

(2) ECU2: FIG. 4 shows a schematic configuration of the ECU2. ECU2, receiver 2
1, coordinate converter 22, CPU23, ROM24 and clock circuit 25
The receiver 21 further includes a receiving circuit 211 and an arithmetic circuit 212. The receiving circuit 211 demodulates the radio wave from the GPS satellite received via the antenna 1, and the arithmetic circuit 212 calculates the orbit data of the GPS satellite and the pseudo distance data between the receiving position and the demodulated signal. The coordinate converter 22
The receiving position, that is, the latitude data and the longitude data of the current position of the vehicle are calculated based on the data output from the receiver 21.

The ROM 24 stores, for each prepared map, the total number of pages of the atlas, the reference position data for each map on each page (latitude LA1, longitude LO1 at the lower left corner of the map, and the upper right corner of the map). Latitude LA2, longitude LO2), scale data, map inclination data, and the like. The map data includes a wide-area map data with the largest scale map and a detailed map of a part thereof, and a map data of each prefecture road with a city map and a part of the detailed map. .

Based on the latitude data and longitude data of the current position from the coordinate converter 22, the map data in the ROM 24 and the data transferred from the display control unit 4, the CPU 23 determines the direction of the destination and the distance of the destination from the current position (straight line). The distance and the like are given to the display control unit 4.

The clock circuit 25 transmits an interrupt signal to the CPU 23 at predetermined time intervals.

(3) Display device 3: As shown in FIG. 5, the display device 3 has a U-shaped frame 30, X-coordinate display LED groups 31-1 to 31-I, and Y-coordinate display LED group 32-. 1 to 32-J and a transparent plate 33.

The X-coordinate display LED groups 31-1 to 31-I are obtained by linearly arranging I LEDs along one side of the frame 30. In addition, the Y coordinate display LED groups 32-1 to 32-J are configured by linearly arranging J LEDs along another side of the frame 30. The X coordinate display LED groups 31-1 to 31-I are numbered from right to left, and the Y coordinate display LED groups 32-1 to 32-J are numbered from top to bottom, respectively. Make up.

The transparent plate 33 is a transparent plate that covers an atlas 34 (see FIG. 2) 34, and includes an X-coordinate display LED group 31-1 to 31-I and a Y-coordinate display LED group 32-1 to 32-J. Each parallel square is drawn. That is, when the transparent plate is put on the atlas 34, the XY matrix lines are superimposed on the atlas 34.

(4) Remote controller 5: FIG. 6 is a plan view of the remote controller 5. The remote controller 5 is provided with a number of key switches for setting a waypoint. The function of each key switch is as follows.

501: Used when manually switching to the next registration point.

502: Used when displaying the total remaining distance.

503: If there are multiple maps of different scales including the current location,
Used to switch the map to be used.

504: Used when reversing the order of reading registered points on the outward route and the return route.

505: Used when using another map.

506: Used when setting routes and registered points.

507: Used when selecting one from a plurality of registered routes.

508 to 511: Used for operations such as display switching and operation selection.

512: Used to switch between the right side and left side of the facing page of the map.

513: Used when turning on / off the power and clearing data.

514: Used when inserting data.

(5) Display control unit 4: FIG. 7 shows a circuit configuration of the display control unit 4. The display control unit 4 includes a controller 41, interface circuits 43, 46, 47, driving circuits 45, 49, a remote control receiving circuit 44,
And a storage circuit 40 and the like.

The controller 41 is supplied with latitude data and longitude data of the current position of the vehicle from the ECU 2 via the input / output interface 43. Further, the controller 41 reads the operation of each key switch of the remote controller 5 via the remote control light receiving section 48 and the remote control receiving circuit 44, and performs necessary display on the display panel 42 via the drive circuit 45. Also, the X-coordinate display LEDs 31-1 to 31- are provided via the output interface 46.
I is output to the Y coordinate display LE via the output interface 47.
The lighting control of each of the D groups 32-1 to 32-J is performed. Also,
The controller 41 sounds the buzzer BZ via the drive circuit 49 as necessary.

The storage circuit 40 has a route A as shown in FIG.
Four destinations, Route B, Route C, and Route D
There is an area that can store location data of transit points, and information on up to nine points (location information) in each area
Can be registered.

FIG. 8 shows a display unit of the display control unit 4. The display on the display unit 42 will be described below.

RD: Displays the remaining distance to the destination.

TG: route area (AD) and route number (1
To 9) are displayed.

FB: One of the LEDs is lit at the time of the forward trip and at the time of the return trip, respectively.

PM: Displays the map book number.

PP: Displays the page number of the atlas.

RA: Displays the scale of the map in three stages: wide area, city, and detail.

DR: One of the 12 lights up to indicate which direction north is relative to the current heading.

AR: One of the 12 lights up to indicate the direction of the destination relative to the current heading.

CD: Up to 5 satellites by turning on LED1 to LED5
The reception status is displayed.

It should be noted that a connector 46 for connecting the light receiving section 48 of the light emitted from the remote controller 5 to the display device 3 is provided right next to the display section 42.

FIG. 1a shows the contents of the arithmetic processing of the CPU 23 of the ECU 2. First, the latitude data LA (Latitu
de) and the longitude data LO (Longitude) are read (Step 1: the word “step” is omitted in parentheses below).

Next, at this time, standard data associated with the map specified by the map number PM and the page number PP, that is,
Read the latitude LA1, longitude LO1 of the lower left point of the map, and the latitude LA2, longitude LO2 of the upper right point of the map, and indicate LA and LO in a rectangular area diagonally specified by these points. Check whether the current position of the car exists (2,
3).

If the current position of the vehicle indicated by the variables LA and LO is not on the map specified by the atlas number PM and the page number PP at that time, the process proceeds to step 4 to perform a search process.

FIG. 1b shows the contents of the search processing (4). In this process, first, the total number of pages PNM of the atlas specified by the atlas number PM is read out (5-1), the page counter PC, the page number PP, the wide area map page number WP, the city map page number.
Clear MP and detailed map page number DP, variable DS11
0 is substituted into {, DS12}, DS13} (5-2).

Thereafter, while sequentially updating the page number PP, the presence or absence of the current position is checked for the map specified by the page number PP in the same manner as described above (5-3, 5-4). At this time, if the current position is present in the map under consideration, the page counter PC is incremented by one (5-5). If it is a wide area map, "W" is substituted for the variable DS11 # and the wide area ground page is set. Set the number WP to the page number PP at that time, and if it is a city map, substitute “M” for the variable DS12 ＄ and the city map page number
MP is set to the page number PP at that time, and if the map is a detailed map, “D” is substituted for the variable DS13 ＄, and the detailed map page number DP
Is set to the current page number PP (5-6, 5-
7).

When the above examination is performed on the maps of all pages of the atlas specified by the atlas number PM (5-8), when there is a map including the current position in the atlas, the page counter PC becomes 1 or more, and there is no map. Sometimes it is 0. Therefore, when the page counter PC is 0, the map book number PM is incremented by 1, and the above search processing is repeated from the beginning (5-
9,5-10). However, when the value exceeds the total atlas number MM by one increment of the atlas number PM, the value is set to 1 (5-11, 5-12).

When the page counter PC becomes 1 or more and it is found that there is a map including the current position in the atlas under consideration, the variable DS
A code obtained by combining 11 #, DS12 #, and DS13 # in this order is substituted into a variable DS1 # (5-13). In other words, a code as shown in Table 1 below is substituted into variable DS1 # according to the number of maps including the current position in the atlas and the type of each map.

In Table 1, “○” indicates that the current position is included, and “×” indicates that the current position is not included.

Finally, a map page suitable for display is set as a page number PP. In this embodiment, the priorities are determined in the order of the city map, the wide area map, and the detailed map from the convenience of reading the position and changing the map due to the movement of the car. If the city map page number is 0 and the wide area map page number WP is not 0, the value is used and the city map page number MP
When the wide area map page number WP is 0, the page number PP is set using the detailed page number DP (5-1).
4,5-15).

In this way, the map book number PM specifying the map book having the map including the current position and the page number PP specifying the map are obtained by the search processing.

Referring back to FIG. 1a. After detecting the current position,
The distance between the current position and the target value (position data transferred by the display control device described later), that is, the remaining distance RD is obtained, and the direction of the north with respect to the car is obtained from the transition of the current position. , And find the direction of the destination (5,6,
7).

The map book number PM, page number PP, position data (latitude data, longitude data), and data such as the destination direction obtained by calculation are transferred to the display control unit 4 by the interrupt processing shown in FIG. 1c. That is, interrupt signals are input to the CPU 23 at regular intervals (about one second in this embodiment) by the clock circuit 25, and data transfer is performed by the occurrence of the interrupt (11). At the time of data transfer, if there is no data to be transferred due to the inability to receive satellite radio waves or the like, information indicating no data is transferred (10, 12).

Next, the operation will be described with reference to the main flowchart of the controller 41 shown in FIG. 2a.

First, when started by turning on the power, initialization processing for initializing input / output ports and initial setting of flags and variables is executed (S1).

Next, a reading process for reading the key operation input is executed (S
2) The process corresponding to the operated key switch is selected and branched (S3). That is, when the key switch 502 is operated, the total remaining distance display processing (S44) is performed, when the key switch 503 is operated, the scale change processing (S41) is performed, and when the key switch 504 is operated, the forward / return switching processing (S44). S45),
Map change processing when key switch 505 is operated (S43)
When the key switch 506 is operated, the destination input and change processing (S42) is performed, when the key switch 507 is operated, the route change processing (S46) is performed, and when the key switch 512 is operated, the L / R change processing is performed. (S47) is executed respectively. The details of each process will be described later.

Thereafter, the controller 41 checks whether the latitude data, the longitude data, the map data, and the like have been transferred from the ECU 2 (S5). If the data has been transferred, the controller 41 clears the ECU error display (S6). Then, the 30-sec timer is restarted (S7), and the transferred data is read (S8).
This 30-sec timer is a timer for checking that data from the ECU does not arrive for 30 seconds or more.

Thereafter, a data error check is performed (S10). If there is a data error, a data error display is performed, and the process returns to step S2 (S13). Otherwise, the operation (S
14) and display alarm processing (S15) are performed, and step S2
Return to The details of the calculation processing (S14) and the display alarm processing (S15) will be described later.

If no data is transmitted from the ECU 2 in step S5, it is checked whether the 30-second timer has expired (S11). If not, the process returns to step 2 again. And an ECU error is displayed (S12).

That is, the controller 41 performs processing (S41 to S47) corresponding to the key operation input, fetches data from the ECU 2, and performs calculation and display control based on each processing result and data from the ECU 2. If there is a data error, a data error display is performed. If data from the ECU 2 does not arrive for a predetermined time or more, an ECU error is determined and an ECU error display is performed.

FIG. 2b shows the contents of the scale change processing (S41). Here, every time the key switch 503 is operated, the page number P
The page number PP is updated according to the conditions indicated by P, the wide area map page number WP, the city map page number MP, and the detailed map page number DP (41-1 and 41-2). That is, when the key switch 503 is operated, if the selected map is a wide-area map (PP = WP) and there is a detailed map including the current position (DP） 0), or if the selected map is selected at that time. If the map is a city map (PP = MP) and there is a detailed map including the current position (DP ≠ 0), the detailed map DP
Is set to “00D” in the variable DS2 ＄ (41-2
-21, 41-2-22). When the key switch 503 is operated, the selected map is a detailed map (PP = D
P) When there is a wide area map including the current position (WP ≠ 0)
Contains the wide area map WP for the page number PP and “W
00 "is set (41-2-31, 41-2-32).
Further, when the key map is operated and the selected map is a detailed map (PP = DP) and there is a city map including the current position (MP ス イ ッ チ 0), the page number PP
Is set to the city map MP and “0M0” is set to the variable DS2 ＄ (41-2-11, 41-2-12). Nothing is performed when a key operation is performed under other conditions.

Thereafter, if the value of N is 0, it is set to 1 and the variable DS ＄
Is set to the value of the variable DS1 ＄ (41-3, 41-4), and the variable N
If the value is 1, it is set to 0 and the value of the variable DS2 is set to the variable DS # (41-3, 41-5), and the display of the contents is instructed to the drive circuit (41-6). To return.

As described above, the entire map including the current position, that is, the sign indicating the type of map that can be selected is set in the variable DS1 ＄, and the sign indicating the type of the map selected at this time is set in the variable DS2 ＄. Since the scale is set, the type of map that can be selected and the code indicating the type of selected map are alternately displayed during the execution of the scale processing.

FIG. 2c shows the contents of the destination input and change process (S42). First, the destination set (displayed) before the key switch 506 is pressed is stored (42-).
1). Next, a route change process (S4
Set the route number set in 6) (42-2),
Based on the set route number, a process for branching to any one of steps S50 to S53 is executed (42-3).

If KC = 1, the route A is selected (42-4). Thereafter, a route number selection process for selecting an area (numbers 1 to 9) for storing a plurality of pieces of position information on the route A is performed (42-5). The contents of this route number selection processing (42-4) are shown in FIG. 2d.

In the process shown in FIG. 2d, first, a key operation input is read, and a route number input display instruction is performed (42-4-4).
1,42-4-2). In this display, the blinking display of the route number that was displayed before the destination input and change processing is started is performed. When there is no data in the area, route 0 is displayed (0 is displayed on the TG of the display unit 42).

When the key switch 511 is operated, the value of the currently displayed route number RC is decremented by one and the routine returns. The lower limit of RC is set to 1 (42-4-4 to 42
-4-6). When the key switch 509 is operated, the value of the currently displayed route number RC is incremented by one and the routine returns. Note that the upper limit value of the RC is set to a value that is one greater than the number MRC of the route numbers already registered at present and equal to or less than 9 (42-4-7 to 42-4-11).

Referring back to FIG. 2c. If KC = 1, the above-described route A selection and route number selection (S50) are performed.
If C = 2, route B, if KC = 3, route C
, And if KC = 4, the route D is selected, and then the route number is selected. Routes B, C, D
Is also the same processing as in the case of route A, and a description thereof will be omitted.

After that, insert key 514, clear key 513 and setting key 5
Check the press of 16. When the insert key is pressed,
In this embodiment, the maximum number of points that can be set as a destination and a stopover point in one area is 9 points. Therefore, if the value of MRC is not 9, the route number selected in the above-described route number selection processing is selected. The data of the area after the area is shifted to the next root number area, respectively,
Performs position setting processing for the current route number area, and the MRC value (the number of route numbers for which information is stored)
Is incremented by one (42-9 to 42-12). For example,
At present, if the position data is stored in the routes A1 to A4, the route A3 is selected in the route number selection process and the push-in key 514 is pressed, the data of A4 is set to A5, and the data of A3 is set to A4.
, And performs position setting processing on A3. The value of the MRC is updated from 4 to 5. The contents of the position setting process (42-11) will be described later.

When the clear key 513 is pressed, the data of the currently selected route number is deleted, and the data stored in the route number areas after the current route number are respectively stored in the immediately preceding route number area. Shift and decrement the MRC value by 1 (42−7, 42−13, 42−
14). For example, if the position data is currently stored in the routes A1 to A4 and the route A2 is selected in the route number selection process and the clear key 513 is pressed, first, the data of A2 is deleted, and the data of A3 is stored in A2. , A4 are respectively shifted to A3, and the value of MRC is updated from 4 to 3.

When the setting key 516 is depressed, a position setting process is performed, and the value of the MRC is incremented by one. If none of the insert key 514, the clear key 513, and the setting key 516 are depressed, the process returns to step 42-1, where the route can be selected.

After setting or changing the route data, it is necessary to press the route change key 507 or the call key 506,
When the route change key 507 is pressed, the position selected by the route number selection is set as the destination (42-17, 42-18). When the call key 506 is pressed, the route destination and the destination before executing the change processing (S46) (the destination stored in S42-1) are set as the destinations (42-19, 42-20).

By setting and changing the route data described above, the route data and the like are stored in the storage circuit 40 as shown in FIG.

The processing shown in Fig. 2e and below, which will be described below, is processing for performing navigation display on a car.

FIG. 2e shows the contents of the position setting process (42-11). This processing is performed by the user inputting a key, and the storage circuit 40 is used as described above.
When the route stored in the route is selectively designated, the display related to the selected route is displayed. Note that the position setting processing in step 42-13 is the same processing.

First, the flag F is set, the map book number MN and the page number PN for position display setting are set to 0, and the numbers XC and XY of each LED pair are set to 1 (101).

Next, the operation of the key switch is read, the map book number MN and the page number PN are displayed on the liquid crystal display 32, and the LED pairs specified by the numbers XC and YC are turned on (102). At this time, every time the setting key 516 is operated, the flag F is incremented by one (103, 104), and the process branches according to the value of the flag F (105).

When the flag F is 0, the drive circuit 45 is controlled in step 106, and the "map input" message, that is, the map number is blinked on the display unit PM. Thereafter, each time the key switch 508 is input, the map book number is incremented by one (111), and each time the key switch 510 is input, it is incremented by one.
The decrement is decremented (108), but when the map book number MN becomes a value exceeding the total map book number MM by this update, it is set to 0.
(112, 113), and when the value is less than 0, it is set in the total atlas number MM. (109,110). The updated map number MN is sequentially displayed on the PM of the display unit 42 in step 102.

When the flag F is 1, the drive circuit 45 is controlled in step 114, and the "page input" message, that is, the page number display section blinks. Thereafter, the page number is incremented by 1 each time the key switch 508 is input (119), and decremented by 1 each time the key switch 510 is input (116). If the value exceeds several PNM, it is set to 0 (120, 121), and if it becomes less than 0, it is set to the total number of pages PNM. (117,118).
The updated page number PN is sequentially displayed on the PP of the display unit 42 in step 102.

When the flag F is 2, the number XC is incremented by 1 each time the key switch 509 is input (127), and is decremented by 1 each time the key switch 511 is input (1).
24) The number XY is incremented by one each time the key switch 508 is input (133), and decremented by one each time the key switch 510 is input (131). Where number X
C is a number that specifies a pair of I pairs of LEDs that constitute the X-coordinate display LED groups 31-1 to 31-I.
When the value exceeds 0, it is returned to 0, and when it becomes less than 0, I is set. Similarly, the number YC is the LE for the Y coordinate display.
Since the number specifies one of the J sets of LED pairs constituting the D groups 32-1 to 32-J, the number is reset to 0 when the value exceeds J, and set to J when the value is less than 0. I do.
The LED pair specified by the updated numbers XC and YC is turned on in step 102.

When the flag F becomes 3, the data of the map book number MN, the page number PN of the map book, and the coordinates (XC, YC) are stored in the storage circuit 40.
Is stored as position information in a predetermined area, and the data is transferred to the ECU 2.

The ECU 2 calculates the latitude LAe and the longitude LOe of the point (destination) thus set, calculates the distance and direction of the destination from the current position of the vehicle, and displays the calculated data on the display device 4. And the display device 4 displays the distance, the direction, and the like.

FIG. 2f shows the contents of the map change processing (S43). When the map change key 505 is depressed, first, a 5-sec timer is started (43-1). Next, if there is an input before the 5 sec timer expires (43-3), 0 is set to the atlas number PM (43-5).

After this, input reading and PM display are performed (43-6,
43-7) Each time the key switch 508 is input, the atlas number PM is incremented by one (43-9).
Every time there is an input of 0, it is decremented by 1 (43-1
2). However, if the map book number PN exceeds the total map book number MM in this update, it is set to 0 (43-10. 43-1).
1) If it becomes less than 0, it is set in the total atlas number MM (43-13, 43-14). The updated map book number is sequentially displayed on the PM of the display unit 42 in step 43-7.

If there is no input before the 5 sec timer expires, the map automatic change processing is performed (43-
4). In this map automatic change process, if a wide area map is currently used, the map is changed to a city map including the current location. If a city map is currently used, the map is automatically changed to a wide area map including the current location.

Next, the contents of the total remaining distance display (S44) will be described.
When the key switch 502 is pressed, the total remaining distance is displayed. In this processing, when the route from the current position to the destination is moved via one or more registered points (destinations), Processing for calculating and displaying the distance is performed. Note that the calculated total remaining distance is blinkingly displayed on the remaining distance display section RD of the display panel 42 for a predetermined time (about 5 seconds).

FIG. 2g shows the contents of the forward / return switching process (S45).
This process is roughly a process of selecting a process of reading information stored in a route number in the order of the route number and a process of reading information in the reverse order of the route number.

First, the number of the route set in the “route change process” is set in the register KC (S61). Next, the sign of the flag GB indicating the information reading order is inverted (S62).

Based on the route number set in the register KC, a process of branching to steps S64 to S67 (route reading process) is executed (S63).

Since each of steps S64 to S67 has the same processing content, step S64 will be described, and the other steps will be omitted.

FIG. 2h shows the operation of route reading in step S64. First, it is checked whether the flag GB is positive (GB = 1) (S641), and if so, the information stored in the route destination setting and change processing (S42) is read out in the order of the route numbers (S642 to S644). ). Note that the position information read in step S643 is stored in the route memory of the storage circuit 40, and is referred to when necessary.

On the other hand, if the flag GB is negative (GB = -1), the information stored in the route destination setting and changing process (S42) is read in the reverse order of the route number (S646-S649).

Note that RC is a counter for sequentially reading out location information (destination), and MRC is the number of route numbers in which information is stored in a route area (for example, route A).

Next, the contents of the route change processing (S46) will be described. In the route change process, each time the key switch 507 is pressed, the value of the register is incremented by one. When the value of the register becomes larger than 4, it becomes 1 again. Register = 1 selects route A, register = 2 selects route B, register = 3 selects route C, register =
In step 4, route D is selected. That is, a process of sequentially selecting one route from the four stored routes (routes A to D) is performed. The symbol of the selected route is displayed on the TG of the display unit 42.

Next, the L / R change processing (S47) will be described. In this process, a process of alternately switching L and R by pressing the key switch 512 is performed. L is designated when the position is set on the left side of the facing page of the atlas 34. Similarly, R is designated when the position is set on the right side of the facing page of the atlas 34. When L is designated, the letter L located immediately to the left of PP on the display unit 42 is lit and displayed.
When R is designated, the character of R located immediately to the left of PP on the display section 42 is lit on. In addition, LED31 and LED
When the position is displayed by 32, either L or R is lit together with the required page number of the atlas.

Next, the arithmetic processing (S5) will be briefly described. In this process, the position data (latitude data L
A, longitude data LO), the current position is displayed on the display device 3 based on the latitude LA1, longitude LO1 of the lower left point of the map where the position exists, and the latitude LA2, longitude LO2 of the upper right point of the map. Is converted to the X-Y coordinate system, and an X-line and a Y-line optimal for the display are selected. More specifically, X = (LO−LO1) · (I + 1) / (LO2−LO1) (1) and Y = (LA−LA1) · (J + 1) / (LA2−LA1) 2) Perform the operation shown in the above to obtain the X coordinate X of the current position on the map.
And the Y coordinate, and then round the coordinate X to obtain the number XC of the LED pair at both ends of the Y line that is optimal for display.
By rounding off the coordinate Y, the numbers YC of the LED pairs at both ends of the X line that are optimal for display are obtained.

FIG. 2i shows the operation of the display alarm process (S6). First,
Atlas number PM, page number PP, scale (wide area, city, details)
Is displayed on the display 42 (15-1 to 15-3). Further, an LED lighting display corresponding to the XC and XY data is performed on the display device 3 (15-4).

Thereafter, it is checked whether measurement is possible (15-5), and if so, the three-minute timer T1 is restarted (15-9), and the reception status of the radio wave from the satellite and the remaining distance are lit and displayed (15-5).
Ten). If the three-minute timer T1 has not expired because measurement is impossible (such as poor reception of satellite radio waves), that is, if a predetermined time (three minutes) has not elapsed since the measurement became impossible, the satellite Is blinked on the LEDs 1 to 5 of the display unit 42, and the remaining distance is lit (15-6 to 15-8).

After that, check if the current position is detectable and the direction is uncertain (15-13). If not, restart the 3-minute timer T2 and check that the car speed is 25 km / h or more. The destination direction is illuminated and displayed on condition (15-17 to 15-
19). Note that the speed of the vehicle uses the speed data output from the arithmetic circuit 212. The direction of the destination is displayed as shown in FIG. The example of FIG. 10 shows that the car is currently traveling in the south direction and the destination is in the east direction.

If the azimuth is not determined and the three-minute timer T2 has not timed out, that is, if the predetermined time (3 minutes) has not elapsed since the azimuth was determined, the destination local position is blinked and displayed (15-). 14-15-16).

If the remaining distance is equal to or greater than the predetermined value, the routine returns.If the remaining distance is smaller than the predetermined value, the buzzer BZ sounds,
Change the destination (relay point) to the next destination and return (15-21 to 15-23).

On the other hand, if a predetermined time has passed since the measurement became impossible in step 15-5 (15-16), the satellite reception status is displayed, the remaining distance display is turned off, and the display of the destination area is turned off. Return (15-11, 15-12, 15-20). If a predetermined time has passed since the azimuth was uncertain in step 6-13 (15-14), the display of the destination area is turned off and the process returns (15-20).

〔The invention's effect〕

As described above, according to the present invention, the display control means (41)
When the reception information of the receiving means (1) becomes defective, the destination direction indicating means (AR) is continuously displayed on the destination direction display means (AR) during the defective time from that point in time and blinks for a predetermined time from the point in time. When the time has elapsed, the display disappears. When the reception information of the receiving means (1) becomes defective, the display control means (41) continuously displays the immediately preceding satellite reception state on the satellite reception report display unit (CD) during the defect. And it blinks, and when a predetermined time elapses from the time, the reception failure is displayed.
Therefore, when the reception becomes impossible or the destination direction cannot be detected, the destination direction or the satellite reception status display flashes for a predetermined time, and the user can detect the destination direction before the predetermined time even if the flashing is longer than the current time. Or, that satellite reception has been disabled, and that the destination direction or satellite reception status immediately before detection is disabled is displayed as blinking,
It can be easily recognized. This makes it relatively easy for the user to recognize that the destination direction or the satellite reception state has become unclear and to subsequently estimate the user in the relative direction. In addition, since the user knows that the destination direction display is turned off or the satellite reception is disabled after a predetermined period of time at the longest, the user can take countermeasures or intentions corresponding to this.

As described above, the user does not need to constantly look at the display. If the user discovers this during the blinking display, the user stops the moving object and re-recognizes the destination by referring to the surrounding environment or map. Therefore, there is no need to operate the moving body while worrying about when the destination direction or the satellite reception state becomes unknown.

[Brief description of the drawings]

FIGS. 1a, 1b, and 1c are flowcharts showing the control operation of the CPU 23 of the electronic control unit (ECU) 2 shown in FIG. 2a, 2b, 2c, 2d, 2e, 2f,
2g, 2h and 2i are flowcharts showing the control operation of the controller 41 of the display control unit 4 shown in FIG. FIG. 3 is a perspective view showing a schematic configuration of a position display device for an automobile according to an embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of the display control unit 4 shown in FIG. FIG. 5 is a perspective view showing the appearance of the display 3 shown in FIG. FIG. 6 is an enlarged plan view showing the appearance of the remote controller 5 shown in FIG. FIG. 7 is a block diagram showing a configuration of the ECU 2 shown in FIG. FIG. 8 shows the display unit 42 of the display control unit 4 shown in FIG.
It is an enlarged plan view which shows the external appearance. FIG. 9 shows a storage circuit of the display control unit 4 shown in FIG.
4 is a memory map conceptually showing 40 stored data. FIG. 10 shows a display unit 42 of the display control unit 4 shown in FIG.
FIG. 3 is an enlarged plan view showing an example of the azimuth / direction display state of FIG. 1: Antenna (receiving means) 2: ECU (current position detecting means) 21: Receiver, 22: Coordinate converter 23: CPU, 24: ROM 25: Clock circuit 3: Display device 30: Frame 31: For X coordinate display LED 32: LED for Y coordinate display 33: Transparent plate, 34: Atlas 4: Display control unit 40: Storage circuit (storage means) 41: Controller (display control means) 42: Display section CD: Satellite reception status display section ( AR: travel direction display (destination direction display means) RD: distance display 43: input / output interface 44: remote control reception circuit 45, 48: drive circuit 46, 47: output interface 48: remote control reception Part BZ: Buzzer 5: Remote control

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-264210 (JP, A) JP-A-62-151712 (JP, A) JP-A-3-255311 (JP, A) JP-A-3-3 116182 (JP, A) JP-A-2-129688 (JP, A) JP-A-1-195316 (JP, A) JP-A-63-67887 (JP, U) (58) Fields investigated (Int. Cl. ^6, DB name) G01C 21/00 G01S 5/14

Claims (2)

(57) [Claims] Receiving means for receiving a radio wave of a GPS satellite; receiving means on a mobile body; detecting a current position based on a signal received by the receiving means; current position detecting means on the mobile body; storing a destination; Storage means on the moving object; destination direction detecting means on the moving object for detecting the direction of the destination based on the detected current position; displaying the detected destination direction on the moving object; When the reception information of the receiving means becomes defective, the destination direction immediately before that is continuously displayed on the destination direction display means during the defect and blinks for a predetermined time from the time. A moving body position display device, comprising: display control means for deleting the display when the time has elapsed. 2. Receiving means on a mobile body for receiving radio waves of a GPS satellite; current position detecting means on a mobile body for detecting a current position based on a signal received by the receiving means; A satellite reception status display unit for displaying the reception status of the radio wave; when the reception information of the reception unit becomes defective, the reception status display of the satellite reception status display unit blinks during the defect from the time,
A display control means for displaying reception impossibility on the satellite reception status display section when a predetermined time has elapsed from the point in time.