JPS5825684A - Course guiding system to be carried on vehicle having display suppressing function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an in-vehicle course guidance system having a breath display function, in particular, an electronic display mounted on the driver's seat of a passenger car and showing roads, etc. on the display screen of the display. A course guidance system that maps a map, extracts the location of the vehicle using a direction sensor and a speed sensor mounted on the vehicle body, plots it on the display, and guides the driving course in association with the map. For example, when driving in a situation where only the driver checks the driving course guidance display, a breath mode is provided to forcibly suppress the display display while driving to prevent dangerous driving behavior. This invention relates to an on-vehicle course guidance system in which the course is prohibited and the course can be confirmed by displaying the traveling trajectory on a display when necessary, for example, when the vehicle is stopped.

Recently, microcomputers have become relatively easy to obtain, and they are now being considered as driving navigators for automobiles. One type of navigator is equipped with a direction sensor and a speed sensor, extracts the driving position of the car, plots the driving trajectory on a cathode ray tube display, and maps a road map onto the display. A system is being developed that guides the course so that the plot extends along the road on the map.

Although such a system is extremely convenient, it is interesting to note that the trajectory of the car is constantly extending in response to the movement of the car, and it is difficult to understand how it corresponds to the map. From the perspective of safe driving, drivers may be tempted to check whether the vehicle is moving forward or not, and the display screen may be relatively bright while driving at night, potentially dazzling the driver. The existence of such a system could pose a significant risk.

The present invention aims to solve the above problems, and will be described below with reference to the drawings.

FIG. 1 is a perspective view of an entire embodiment of a unitized course guidance system of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is position information stored in the trajectory memory shown in FIG. FIG. 4 is an explanatory diagram illustrating the storage mode and readout mode, and FIG. 4 shows the central configuration of an embodiment of the display drive circuit section which performs the display breath according to the present invention.

In FIG. 1, 1 is a display screen of a cathode ray tube display, 2 is a shade part, 3 is a map printed on, for example, a transparent film, 4 is a map insertion guide monument, 5 is a map fixing means, and 6 is a traveling vehicle. It represents the trajectory.

As will be described later with reference to FIG. 2, a direction sensor and a speed sensor are mounted on the vehicle body to extract the momentary running position from the starting point, for example, and display the running trajectory 6 on the display screen 1 of the cathode ray tube display. Let's plot it. On the other hand, a map 3 printed on a transparent film is inserted from the bottom as shown in the figure along the map insertion guide 4, so that the map is placed in front of the display screen 1, and the fixing means 5 Fixed by Of course, it goes without saying that consideration has been given to allowing the trajectory 6 to be displayed in accordance with the scale of the map. Then, the traveling trajectory 6 is made to appear sequentially along the desired traveling route on the map, and the driver or passenger knows the current traveling position based on the correspondence between the traveling trajectory 6 and the map, and determines the direction of travel. The current position etc. are determined.

FIG. 2 shows an overall block diagram of one embodiment of the present invention. Reference numeral 7 in the figure is a direction sensor that detects the direction in which the vehicle is traveling in accordance with a reference direction. A speed sensor 8 emits a clock pulse corresponding to, for example, the rotation of a wheel. Reference numeral 9 denotes an input key, which is located on the front of the shade part shown in Figure 1 and (14) on the display body (not shown).
It shows various keys on 11 sides and 10 displays.

Direction information from the direction sensor 7 is converted into a digital signal by a VD converter 11, and converted into angle information by an angle conversion unit 12. On the other hand, the clock pulses from the speed sensor 8 are counted by a counter 13, so that a sample clock can be output, for example, every 10 revolutions of the wheel. Every time the sample clock is issued, the angle information from the angle conversion section 12 is supplied to the X component calculation section 15X and the Y component calculation section 15Y via the angle correction section 14. Then, the calculation unit 15X extracts the change on the X-axis based on the direction (north), adds it to the cumulative value of the X-axonization up to that point, calculates the current position coordinates on the X-axis, and calculates the trajectory. #0 bank of memory 16 (BA
NK). Also, calculation section 15 Y
Similarly, extracts the change on the Y-axis, adds it to the cumulative value of the Y-axis degree up to that point, calculates the current position coordinate on the Y-axis, and stores it in the #0 bank (BANK) of the trajectory memory 16. So supply. That is, for example, if the coordinates at the start point are (0
, 0), the coordinate values of the current position are calculated and supplied to the trajectory memory 16.

The contents of the trajectory list 16 are read out for transcribing to the trajectory memory 18, undergo a predetermined conversion in the memory conversion processing section 17, and are stored on the trajectory memory 18. In this case, conversion corresponding to the scale of the map is performed, which will be described later with reference to FIG.

The contents of the trajectory memory 18 are read out for VC transcription in the trajectory display memory 20, and are subjected to a predetermined conversion such as parallel movement in the memory conversion processing section 19 and stored in the trajectory display memo 1J20. The contents of the trajectory display memory 20 correspond to the image graphics displayed on the display 1o, and are read out via the display drive circuit section 21 and supplied to the display 1o. That is, a traveling trajectory 6 as shown in FIG. 1 is obtained. The traveling trajectory 6 is observed through a map written on a transparent sheet shown in FIG. 1, and is made to match a desired road on the map.
Course guidance will be provided.

Reference numeral 22 is an L scale register in which scale information of the set map shown in FIG. 1 is set via an input key 9. The contents of the register 22 are supplied to the memory conversion processing section 17 and used when transcribing the contents of the trajectory memory 16 to the trajectory memory 18. Further, the contents of the register 22 are notified to the sampling interval determining section 23, and the contents of the register 22 are notified to the memory address generating section 2.
The processing used during this time will be described later with reference to FIG. 3.

Reference numeral 25 is a θ correction register, in which a correction value is set from input key 9 to correct the angular deviation between the above-mentioned travel trajectory and the map when the vehicle is actually traveling on a road.

Then, the content of the trajectory memory 16 is calculated using the correction value set in the adjustment mode, that is, the correction value set to correct the angular deviation in the adjustment mode such as when the unit shown in FIG. 1 is mounted on the vehicle body. When transcribing to the trajectory memory 18, the above-mentioned angular deviation is corrected.

26u, X, Y, θ correction register, the map is the first
In the state set as shown in the figure, supplementary IE data is set through all input keys 9 in order to correct slight distortion between the road on the map and the regular trajectory 6. Then, when transferring the contents of the trajectory memory 18 to the trajectory display memory 20,
The memory conversion processing section 19 corrects the lid.

27 is a parallel movement and/or rotation movement register, which is used to move the entire travel trajectory 6 on the display 10 in parallel or rotate it when replacing the set map 3 with a new map as shown in the WtE1M illustration. In this case, the movement amount information is set from the input key 9, and when the contents of the trajectory memory 18 are transferred to the trajectory display memo')2OK, the memory conversion processing section 19 performs the above-mentioned parallel movement and rotation. .

It is a 28-digit count value memory, and is a pulse at the time the car passes, for example, a railroad crossing or a bridge.

The contents of the counter 13 are set and used to plot the passing position on the display screen of the display 10 in a display mode different from that of the traveling trajectory 6 described above. That is, a memory or mark of a brighter point is left in the travel trajectory 6 and is used for alignment with the map. A comparison processing section 29 is used to write a mark on the locus display memory 20 corresponding to a point corresponding to the contents of the count value memory 28. Furthermore, 3o is an encoder, which generates a code corresponding to the input information from the input key 9.

Note that the display drive circuit section 21 shown in FIG. It has a display press function that suppresses the driver from being undesirably distracted by the display on the display 1o while driving.〇The above-mentioned X component calculation unit 15X, Y component calculation unit 15Y1 trajectory memory 16, the main processing in the memory conversion processing section 17 and the trajectory memory 18 will be explained in detail with reference to FIG.

As mentioned above, the X component calculation section 15 and the X and Y component calculation section 15Y
For example, assuming that the coordinates of the starting point are (0, 0), the coordinates (1/s) of the vehicle traveling position at the time corresponding to each sample clock are calculated.

This result is stored in the trajectory memory 16, and if this aspect is illustrated corresponding to the traveling trajectory 6, it can be considered as the one on the left side of the figure (3rd figure). In other words, the coordinates of the starting point (
0,0) to'"tl 1 m'% 1) +"
'''('213/2)*('i,i/lL('O
IS'0) is stored in the trajectory memory 16. The trajectory memory 16 includes, for example, #0 bank (BAN) for 128 words.
K), it has #1 bank to #5 bank of 64 words. And the illustrated coordinates (πo*uo)?
128 coordinates as the starting point, ie ("127 # u12
t) are sequentially stored in the #0 bank in a push-down method, and for example, even one in two pieces of coordinate information overflowing from the #0 bank is extracted and stored in the #1 bank in a push-down method. The coordinate information overflowing from one bank is extracted, for example, one out of two and stored in bank #2 in a write-down manner. The same holds true for storage in banks #3 to #5.

In other words, as shown in Figure 3 (B), the current location (IB
The coordinate information for 128 pieces as seen from the current point (mo, yo) is stored in bank #0 for each sample clock, and the 129th to 256th pieces from the current point (mo, yo) are stored in 2 samples.・One piece of coordinate information in the clock is 6
Four pieces are stored in bank #1. Similarly below, 5
From the 13th piece to the 1024024th piece of coordinate information, 64 pieces of coordinate information are stored in bank #2, one piece every four sample clocks. Furthermore, bank #3 stores one for every 8 sample clocks, bank #4 stores one for every 16 sample clocks, and bank #5 stores one for every 32 sample clocks. .

When using a map as described above, the display l.

The driving trajectory above should be displayed in a manner appropriate to the scale of the map. For this reason, in order to display the travel trajectory 6 corresponding to the map with the smallest scale, coordinate information on bank #0 is sampled at intervals of "1" (as shown in FIG. 3(C)). 128 point-by-point travel trajectories are generated by sequentially reading the data (without sampling). In addition, when using a map with a scale of approximately twice
(Extract every other point) and read out 64 pieces of coordinate information from the #1 bank with an interval of ``1'' to create a travel trajectory consisting of a total of 128 points. generate. Similarly, if a map with a scale of about 32 times is used, for example, every 32 pieces from the #0 bank, every 16 pieces from the #1 bank, every 8 pieces from the #2 bank, and 4 pieces from the #3 bank. Every two points are read out from bank #4, and all are read out from bank #5 to generate a total of 128 point-by-point travel trajectories.

When the contents of the trajectory memory 16 are transferred to the trajectory memory 18, scale information is set in the scale register 22 in accordance with the above-mentioned scale ratio, and the sampling interval as described above is determined in accordance with this. A memory address is generated. Then, based on the address, the trajectory memory 1
6 is accessed.

During this time, correction is performed based on the contents of the θ correction register 25 described above, but a detailed explanation thereof will be omitted in connection with FIG. 2. However, trajectory memory 16
When extracting 128 points from the contents of and storing them in the trajectory memory 18, the memory conversion processing unit 17 converts the current coordinate position to the origin (as conceptually shown on the right side of the figure 3).
0,0), and the previous coordinate position is (J ”O*v1
'O), the previous coordinate position is (Ex-”o, 'W2-
110) , . . . and is transferred to the locus memory 18. By doing this,
When displaying on the display 10, processing can be performed using the current position as a reference, and various adjustments can be made easily.

The on-vehicle course guidance system according to one embodiment of the present invention has the configuration and functions as described above, but the traveling trajectory 6 on the display changes from moment to moment in accordance with the traveling of the automobile. The plot continues to grow. For this reason, the driver is likely to be interested in watching the plot unfold. Also, it is easy to get tempted to follow the correspondence with the map with your eyes. Furthermore, when driving at night, the display screen shines relatively brightly, and there is a risk of being dazzled by it.

For this reason, for example, only the display display can be forcibly suppressed while the car is running, and only when the car is stopped, except when there is a passenger and the driver is checking the driving course. It is desirable to be able to display the travel trajectory up to the point on the display.

In order to realize this, it is possible to specify the breath mode to be displayed using the input key 9 shown in FIG. - Only displaying on the display 10 is prohibited while a pulse corresponding to running from the sensor 8 is present.

FIG. 4 shows a display drive circuit section 2 shown in FIG. 2 in which the display of the travel trajectory 6 is forcibly prohibited.
1 shows a main part configuration of an embodiment of a display drive circuit section.

In FIG. 4, a 31-digit counter, 32 an S-flip, a flop, 33 a NOT circuit, 34 and 35 an AND circuit, 36 a NOT circuit, and 37 an OR circuit. Pulses generated from the speed sensor 8 in response to the rotation of the crank and shaft of the automobile are supplied to the clear terminal of the counter 31. For this reason, the output of the counter 31 is placed at a low level, and the AND circuit 34 having a negative input is always placed in an off state. On the other hand, when there is no pulse from the speed sensor 8, that is, when the running is stopped, the counter 31 counts the clock supplied from the flip-flop '32, and when it reaches a predetermined count value, the counter 31
The output of is placed high. For this reason, when the encoder 30 provides a breath mode to display, the AND circuit 34 is turned on. Therefore, in a state where the display mode is given, the AND circuit 35 is turned off and the display on the display 10 is suppressed while the vehicle is running, and when the vehicle is stopped, the counter 31 is set to a predetermined count value. The AND circuit 35 is turned on and the display 1 is displayed.
A traveling trajectory 6 is displayed on 0. Furthermore, when the breath mode to be displayed is not given, the AND circuit 35 is always in the on state, and the travel trajectory 6 is displayed on the display 1o. Therefore, as long as the driver is set to the display mode, the driver will not be distracted by the display of the travel trajectory 6 while driving.

As described above, according to the present invention, the driver will not be undesirably distracted by the display of the travel trajectory on the display and will not make a mistake while driving.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an entire embodiment of a unitized course visiting system of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a position of storage in the trajectory memory shown in FIG. Explanatory diagram illustrating storage mode and readout mode of information, 4th
The figure shows a main part configuration of an embodiment of a display drive circuit section which performs display breath according to the present invention. In the figure, 1 is a display screen, 2 is a shade part, 3 maps, 4 is a map insertion guide groove, 5 is a Fi map fixing means, 6 is a running track, 7 is a direction sensor, 8 is a speed sensor, 9 is the input key, 11o is the display, 13 is the pulse counter, 16.18 is the trajectory memo'), 17*19
2 is a memory conversion processing unit, 2o trajectory display memory, 21 is a display drive circuit, 22 is a scale register, 23 is a sampling interval determination unit, 24 is a memory/address generation unit, 28 is a count value memory, and 29 is a comparison processing unit. , 31 is a counter,
32 ha flip. Indicates a flop. Patent applicant Alps Electric Co., Ltd. (1 other person) Representative Patent attorney Mori 1) Hiroshi Continued from page 1 0 Inventor Tadashi Mukai Alps Electric Co., Ltd. 1-7 Yukitani Inuzuka-cho, Ota-ku, Tokyo 0 Inventors Tsuneo Takahashi 192 Fujikine, Tsurugashima-machi, Iruma-gun, Saitama Prefecture 100 Inventor Shin Yasui 2-7-26 Sanno, Ota-ku, Tokyo 0 Inventor City use 2006 Shimo-Nikura, Showako City @ Applicant Honda Motor Co., Ltd. Company 6-27-8 Jingumae, Shibuya-ku, Tokyo

Claims (1)

[Claims] A direction sensor and a speed sensor are mounted on the vehicle body, and a display mounted on the vehicle body and a map displayed in correspondence with the display screen of the display are provided. In the on-vehicle course guidance system configured to extract the location of the vehicle, plot the location on the display, and correlate the location with the map, the predetermined travel distance obtained from the speed sensor and the direction A trajectory memory sequentially stores the X-component value and Y-component value of the traveling position based on the traveling direction obtained from the sensor, and the information extracted by making the content of the trajectory memory correspond to the scale of the map is displayed on the display. A trajectory display memory stored in correspondence with the display screen, a display drive circuit section that controls reading out the contents of the trajectory display memory and displaying it on the display, and a display that plots the traveling trajectory of the vehicle body on the display screen. In addition, the display is characterized in that the running state of the vehicle body is detected during a display breath mode given by an instruction from an operator, and display of the travel trajectory on the display screen of the display is suppressed. An in-vehicle course guidance system with a breath function.