JPH11149598A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and compactly provide a course deviation to a specific travel route in real time without using a car navigating device. SOLUTION: This device recognizes an average value of a travel speed of a vehicle, the existence left and right turns, an average value of proceeding azimuth and a travel distance from a travel start point, compares them with reference data stored in a nonvolatile random access storage device 39, decides course deviation and shows it on a display panel 2. In such cases, it also collates reference data that correspond to a point of time before and after a recognition point of time and gives flexibility to some time deviation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a vehicle for displaying various information such as a running speed of a motor vehicle and various indicators.

[0002]

2. Description of the Related Art In an instrument panel near a driver's seat of a vehicle, a vehicle display device for displaying various information such as a running speed of the vehicle and various indicators is installed. FIG. 8 is a front view showing the display device 1 for a vehicle.
Warning display of running out of fuel 5, Water temperature gauge of engine coolant 6, Warning display of the water temperature 7, Warning display of parking brake operation 8, Lighting display of upper beam 9, Lighting display of turn signal 10, Display of odometer 11 Is performed, and various displays such as a digital clock are displayed in the lower portion of the display panel 2.

[0003] Data serving as the basis of these various display elements, that is, various data such as the traveling speed of the automobile and the right / left turn data are stored in a predetermined recording device provided near the vehicle display device 1 and processed. It had been.

[0004] Apart from this, in recent years, the traveling position of a vehicle has been confirmed while searching for a route to a travel destination, and whether or not the vehicle has made a mistake in the route searched for the route has been checked. , The so-called car navigation device 20 (FIG. 9) is becoming widespread.

[0005] This car navigation device 20 is shown in FIG.
As described above, the map is traced by the autonomous navigation control unit 21 based on a vehicle speed pulse from a vehicle speed sensor (not shown) and a direction due to geomagnetism from a geomagnetic sensor (not shown),
A GPS signal transmitted from a GPS satellite is received by a GPS receiver 23 through an antenna 22, and the position of the vehicle is confirmed by a GPS control unit 24 using information included in the GPS signal. The GPS controller 24 performs position correction (map matching) when a position shift occurs in the trace.

The autonomous navigation control unit 21 and the GPS control unit 24
The information obtained in (1) is image-edited by an image editing unit 26 installed around the driver's seat and displayed on a dedicated display device 25 such as a color liquid crystal monitor. That is, the image editing unit 26 applies the autonomous navigation control unit 21 and the GPS control unit 2 to the map information obtained from the optical disc device 27 (CD-ROM).
The running position and the like of the automobile determined in step 4 are displayed in color.

[0007] At this time, the destination of the vehicle is registered on a map by a destination input unit 28 having a multi-directional switch such as a cross button or a joystick, and a recommended route from the traveling position to the destination is searched. The search is performed by the unit 29, and the recommended route is displayed on the map displayed on the display device 25. In this case, the registration and the search were performed only for the stationary objects such as land and buildings as the destination.

The car navigation device 20 is mounted on an automobile as a separate device from the vehicle display device shown in FIG.

[0009]

In the above-described conventional example, the car navigation device 20 and the vehicle display device 1 are used.
In addition, since the recording devices (not shown) are separated from each other, a lot of space for installation is required, and therefore, it is not always satisfactory from the viewpoint of saving space.

In particular, the car navigation apparatus 20 requires a plurality of CPU functions in view of image processing of a large amount of road map information such as location map data and display map data.
7, a large-capacity data storage device is required. Therefore, it is practically difficult to mount the car navigation device 20 having advanced functions such as map display on the above-described vehicle display device 1 due to the installation volume and the like.

By the way, especially for an automobile which travels on a specific operation route every time, the car navigation system 2
There is a case where it is not always necessary to handle a wide area road map as information handled by 0. In other words, as long as a warning of course out for a specific operation route is given, it is possible to find a mistake in the progress to the destination route without necessarily referring to all the information mounted on the car navigation device 20 described above. Rather, it would be advantageous if the vehicle capacity could be reduced.

An object of the present invention is to provide a car navigation device requiring a large volume by adding a course-out warning function, which can be realized with a relatively small and relatively simple configuration, as a display element in an instrument panel. It is an object of the present invention to provide a vehicular display device capable of confirming a course-out to a destination even if omission is performed.

[0013]

Means for Solving the Problems In order to solve the above problems,
The invention according to claim 1 is a vehicle display device that is installed in a dashboard in front of a driver's seat of a vehicle and displays various information, such as general vehicle travel information such as a vehicle speedometer and a fuel gauge. And a display panel for displaying a general display item that is a course out notification item that notifies the driver when the traveling position of the car deviates from the specific operation route,
A drive circuit for displaying and driving the display panel, an input interface for receiving electric signals from switches and sensors attached to various parts of the vehicle, and detecting a specific type of running state related to the course-out of the vehicle. Running state detecting means, time measuring means for outputting time data, and appropriately executing predetermined arithmetic processing based on signals from the input interface, the running state detecting means and the time measuring means, and displaying on the display panel A control unit for transmitting a display signal about a matter to be transmitted to the drive circuit,
A storage device for temporarily recording various data processed by the control unit and keeping the various data even after the operation is completed.

[0014] In the storage device, a reference table storing reference states at predetermined time intervals for the specific type of travel state for the specific operation route from the start of the vehicle to the predetermined destination is recorded. And also
The control unit outputs a display signal to the drive circuit so that the display panel displays the general display item based on signals from the switches and the sensors obtained through the input interface. Control means, and recognizes the specific type of running state of the vehicle detected by the running state detecting means at each of the predetermined time intervals, and recognizes the recognized specific type of running state and its recognition time and the recognition time. A comparison is made with the reference state stored in the storage device in association with the preceding and following points, and the traveling state at the recognition point does not match the reference state corresponding to the recognition point and the points before and after the recognition point. If the vehicle is out of the specific operation route when the vehicle is out of the specific operation route, In which and a route suitability judging means for outputting an alarm signal according to the course out notification matters drive circuit.

According to a second aspect of the present invention, the route suitability judging means is configured such that when the vehicle arrives at a destination on the specific operation route, the vehicle of the specific type recognized at the predetermined time interval is run. A function of cumulatively correcting the reference state based on the state and updating and storing the reference state in the storage device is provided.

According to a third aspect of the present invention, the running state detecting means includes at least a running speed detecting means for detecting a running speed of an automobile, and the reference table in the storage device stores the running speed at every predetermined time interval. The average value of the average speed of the vehicle in the past traveling is stored at least as a reference speed value, and the route suitability determining unit averages the traveling speed of the vehicle detected by the traveling speed detecting unit at every predetermined time interval. Computing and recognizing, comparing the recognized average speed value with the reference speed value stored in the storage device in association with the recognition time and the time before and after the recognition time, and When the speed difference between the average speed value and the reference time value corresponding to the recognition time and the time before and after the recognition speed is equal to or greater than a predetermined allowable tolerance, the traveling position of the vehicle is Those that are allowed to have a vehicle speed reference determination unit for outputting an alarm signal according to the course out notification matters to the drive circuit determines that deviates from the constant service route.

According to a fourth aspect of the present invention, the driving state detecting means includes at least a right / left turn detecting means for recognizing a right / left turn of the vehicle, and the reference table in the storage device stores the right / left turn at every predetermined time interval. The appearance frequency probability or the accumulated value in the past traveling about the presence or absence of right / left turn is stored at least as a reference frequency value, and the route suitability determining means determines whether the right / left turn of the vehicle detected by the right / left turn detection means is Recognize at predetermined time intervals, refer to the appearance frequency probability or the accumulated value stored in the storage device in association with the recognition time and the time before and after the recognition time, and turn right or left at the recognition time. When the occurrence frequency probability or the accumulated value corresponding to the recognition time point and the time points before and after the recognition time point is recognized as being Position is what was allowed have a right or left turn reference determination unit for outputting an alarm signal according to the course out notification matters to the drive circuit determines that deviates from a specific service route.

According to a fifth aspect of the present invention, the traveling state detecting means includes at least an azimuth detecting means for detecting a traveling azimuth of the vehicle, and the reference table in the storage device stores the past traveling. At least an average of the traveling azimuths of the vehicle for each predetermined time interval is stored as a reference azimuth value, and the route suitability determining unit averages the traveling azimuth of the vehicle detected by the azimuth detecting unit for each of the predetermined time intervals. The average azimuth value recognized is compared with the reference azimuth value stored in the storage device in association with the recognition time point and the time points before and after the recognition time point. When the azimuth difference between the azimuth value and the reference azimuth value corresponding to the recognition time point and the time points before and after the recognition time point is greater than or equal to a predetermined allowable tolerance, the traveling position of the vehicle is determined to be a specific operation route. It is determined that the out those that are allowed to have a vehicle speed reference determination unit for outputting an alarm signal according to the course out notification matters to the drive circuit.

According to a sixth aspect of the present invention, the running state detecting means includes at least a running speed detecting means for detecting a running speed of the automobile, and the reference table in the storage device stores the running speed at every predetermined time interval. The average value of the traveling distance from the start of traveling of the vehicle in the past traveling is stored at least as a reference distance value, and the route suitability determining means is based on the traveling speed of the vehicle detected by the traveling speed detecting means. Recognize the travel distance of the vehicle from the start of travel at each of the predetermined time intervals, and store the recognized travel distance in the storage device in association with the recognized time and the time before and after the recognized time. A reference distance value is compared, and a distance difference between the traveling distance at the recognition time point and the reference distance value corresponding to the recognition time point and a time point before and after the recognition time point is determined. When the tolerance is equal to or more than the allowable tolerance, the driving position of the vehicle is determined to be deviated from the specific operation route, and the driving circuit is provided with a vehicle speed reference determining unit that outputs an alarm signal relating to a course-out notification item. .

[0020]

FIG. 1 is a block diagram showing a vehicle display device according to an embodiment of the present invention. Elements having functions similar to those of the conventional example are denoted by the same reference numerals. This vehicle display device omits a car navigation device that requires a large volume by adding a course-out warning function that can be realized with a relatively simple configuration with a small volume as a display element in the instrument panel. Also, it is possible to confirm the course out for the destination. Hereinafter, the vehicle display device will be described in detail.

This display device for a vehicle is installed on an instrument panel in a dashboard in front of a driver's seat of an automobile and displays a variety of information, and a display for driving the display panel. A driver 31 (drive circuit) and an input I / F for receiving electric signals from switches and sensors attached to various parts of the vehicle
(Interface) 32, an azimuth sensor 33 (azimuth detecting means) for detecting the traveling direction of the vehicle, a vehicle speed sensor 34 for detecting the number of rotations of the wheels and generating a vehicle speed pulse indicating the vehicle speed of the vehicle. A counter 35 (running speed detecting means) for counting speed pulses from the vehicle speed sensor 34 at predetermined time intervals to obtain speed information; a timer 36 (time measuring means) for outputting time data;
A CPU (control unit) 37 for executing predetermined processing based on various data from 36 and transmitting a display signal to the display driver 31, and a software program for defining a processing procedure functioned by the CPU 37 are stored. ROM
(Read-only storage device) 38 and an NVRAM (non-volatile random access storage device) 39 which temporarily records various data processed by the CPU 37 and keeps the above-mentioned data even after the operation is completed (after power-off). Have.

The display panel 2, as shown in FIG.
D is a general dot display type display device using D or the like, and according to drive control by a display driver 31, a speedometer 3, a fuel gauge 4, a warning display of running out of fuel 5, a water temperature meter for engine coolant 6, General display items such as a water temperature warning display 7, a parking brake operation warning display 8, an upper beam lighting display 9, a turn signal lighting display 10, and an odometer 11 are displayed. Is displayed on the course-out display section 12 (course-out notification item) for giving an alarm at the time of course-out as described later.

The input I / F 32 receives on / off electric signals of various switches and sensors,
The voltage level is converted and output to the CPU 37. In particular, the vehicle state display control means 41 and the route suitability determination means in the CPU 37, which will be described later, receive right / left turn information input based on a signal obtained from a steering angle sensor (right / left turn detection means: not shown). In addition to transmitting to the right / left turn reference determination unit 44 in 42, a start (switch-on) signal of an operation monitor in the vehicle display device and a signal from an ignition switch are received from a predetermined operation switch (not shown). And outputs it to the CPU 37. further,
Reference data described later or an alarm reference creation mode start signal described later is also supplied to the CPU 37 via the input I / F 32 at the time of manufacture or shipment.
37, the data is stored in the NVRAM 39 or the ROM 38.

As the azimuth sensor 33, a general geomagnetic sensor is used, and is installed at a predetermined position on a vehicle body. Alternatively, a more accurate gyro sensor may be used in combination with this geomagnetic sensor.

The CPU 37 has an input I / F 3 as shown in FIG.
A vehicle state display control means 41 which receives electric signals from various switches and sensors obtained through the control panel 2 and transmits various control signals to the display driver 31 so as to display the state of each part of the vehicle on the display panel 2; Sensor 33,
A route suitability determining unit 42 is provided for determining whether or not a course out of a specific operation route has occurred based on signals from the counter 35 and the timer 36.

The vehicle state display control means 41 exhibits an existing general function of displaying an indicator on the display panel 2 or a warning lamp through the display driver 31 in accordance with various data provided from the input I / F 32. Since the detailed control procedure is the same as before, the detailed description of the function is omitted.

The route suitability determination means 42 further includes a vehicle speed reference determination unit 43, a right / left turn reference determination unit 44, an azimuth reference determination unit 45, and a distance difference reference determination unit 46. All of these (reference numerals 43 to 46) indicate various running states (average running speed, right / left turning operation, right / left turning operation, vehicle speed, etc.) of the elapsed time from the departure time to the destination arrival time at predetermined time intervals σ.
The average azimuth and the traveling distance from the start of traveling are recognized, and it is determined whether the recognized various traveling states are appropriate in light of the reference data stored in the NVRAM 39.

The individual judging units 43 to 46 will be specifically described. Here, it is assumed that the operation route from the departure point to the destination is predetermined as one “specific operation route”.

While the vehicle is traveling on the specific operation route, the vehicle speed reference determining unit 43 first obtains speed information from the counter 35 and obtains the speed information within a predetermined time interval σ, for example, one minute as shown in FIG. The obtained speed information is averaged (step S11),
The average speed value is stored in the column of “speed” in the “running state recording table (Table 1)” in the NVRAM 39 (step S12). Note that the column of “Nσ” in Table 1 is a value obtained by rounding up and displaying the basic data of the calculated average speed value in units of “minutes” with the starting point of the vehicle as a zero reference. This is the data number of the average speed value. According to the data number Nσ, the average speed value is sequentially stored in the column of “speed” in the “running state recording table (Table 1)” at every predetermined time interval σ.

[0030]

[Table 1]

In parallel with this, the vehicle speed reference determining unit 43
The data is compared with the data (reference speed value) in the column of “speed” in the “reference table (Table 2)” stored in advance in the NVRAM 39.

[0032]

[Table 2]

Here, the "reference table (Table 2)"
Is a record of the past running conditions,
Specifically, in the "speed" column, the average speed value (reference speed value) for each data number N?
In the column of “TURN”, each data number N in the past traveling
Appearance frequency probability of right / left turn and straight ahead for each σ (reference frequency value)
Is the number of each data number N in the past run
The average azimuth for each σ (for example, the average value of the angular difference with respect to the true north direction: the reference azimuth value) is described in the “distance difference” column in the travel distance corresponding to each data number Nσ in the past travel (travel from the start of travel). (Distance: reference distance value). Therefore, for example, the average speed value (reference speed value) in the “speed” column of the “reference table (Table 2)” and the average speed value in the “speed” column of the “running state recording table (Table 1)” are greatly different. If different, it is highly likely that the vehicle is traveling on a route different from the route (reference route) assumed in the “reference table (Table 2)”.

However, in an actual traveling, the same traveling state does not always appear accurately at every predetermined time interval σ, but usually appears slightly before and after. Therefore, in the comparison between the “running state recording table (Table 1)” and the “reference table (Table 2)”, not only the same data number Nσ but also the values before and after the data number Nσ are compared. That is, the average speed value of the data number Nσ stored in the “running state recording table (Table 1)” (the “speed” column)
Is compared with the same data number Nσ or the data numbers (Nσ-1, Nσ + 1) before and after the same (step S13).

In step S14, any of these data numbers (Nσ-1, Nσ, Nσ + 1) in the reference data in the “reference table (Table 2)” indicates If the difference between the average speed values is equal to or larger than the preset allowable tolerance d1, a warning signal about the traveling speed is transmitted to the display driver 31 as a deviation from the reference route (course out) (step S15). However, in at least one of the plurality of data numbers (Nσ-1, Nσ, Nσ + 1) including before and after, the difference between the average speed values of both tables (Tables 1 and 2) is smaller than the preset allowable tolerance d1. In some cases, there is a possibility that the vehicle is traveling on the reference route within the time including the preceding and following times, so that the display driver 31 is not sent a warning signal about the traveling speed. Then, after a predetermined time interval σ elapses (step S16), step S1
The operation from step 1 is repeated.

Similarly, the right / left turn reference determining unit 44
As in step S21 in FIG. 5, information on the right or left turn from the input I / F 32 is obtained, and for example, 1 is set as the predetermined time interval σ.
The right / left turn information obtained within a minute is stored in the column of “TURN” in the “running state recording table (Table 1)” in the NVRAM 39 (step S22). That is, when there is only one right or left turn within the predetermined time interval σ, the flag data indicating “right (R)” or “left (L)” is stored as data, and within the predetermined time interval σ If there is more than one turn, the information of the last turn is stored. If there is no turn within the predetermined time interval σ, “go straight (F)”
Is stored.

Then, the right / left turn reference judging section 44 outputs the NVR
The data is compared with the data (reference frequency value) in the column of “TURN” in the “reference table (Table 2)” stored in advance in the AM 39 (step S23). That is, the right (R), left (L) or left (L) or right (R), left (L) or straight ahead (F) appearing in each data number Nσ of the “running state recording table (Table 1)”. In the “TURN” column of the “reference table (Table 2)” corresponding to the straight ahead (F), the appearance frequency probability is set to any data number (Nσ−1,
If Nσ, Nσ + 1) is also zero,
It is highly likely that the vehicle is traveling on a route different from the route (reference route) assumed in the “reference table (Table 2)”. In this case, the determination in step S24 is negative, and a warning signal for turning left or right is transmitted to the display driver 31 assuming that the vehicle is out of the reference route (course out) (step S25). On the other hand, at least one of a plurality of data numbers (Nσ-1, Nσ, Nσ + 1) including before and after in the “reference table (Table 2)”
If the two data items (appearance frequency probabilities) are greater than zero (if the determination in step S24 is affirmative), there is a possibility that the vehicle is traveling on the reference route within a time that includes before and after such data. Proceed to S26 and display driver 3
No warning signal for turning right or left is transmitted to the first device. In step S26, it is determined whether or not a predetermined time interval σ has elapsed, and after the lapse of time, the operation from step S21 is repeated.

The azimuth reference determining unit 45 obtains azimuth information from the azimuth sensor 33 as in step S31 in FIG.
The average value of the traveling azimuth within one minute as the predetermined time interval σ (hereinafter referred to as “average azimuth”) is stored in the “azimuth” column of the “running state recording table (Table 1)” in the NVRAM 39 (step). S32).

Then, the azimuth reference judging section 45 outputs the NVRA
Data numbers (Nσ-1, Nσ, Nσ, Nσ-1, Nσ) including before and after the “reference table (Table 2)” stored in advance in M39
(Nσ + 1) is compared with the average azimuth data (reference azimuth value) in the column of “azimuth” (step S33), and in step S34, if at least one of the differences is smaller than the predetermined allowable tolerance Δθ, the alarm signal of the azimuth is output. While the output is not performed (proceeding from step S34 to step S36), the data number (Nσ-
If the value of the difference is equal to or larger than the allowable tolerance Δθ for all the data of (1, Nσ, Nσ + 1), it is determined that there is a course out, and a warning signal about the azimuth is output to the display driver 31 (step S35). And a predetermined time interval σ
(Step S36), the processing operation from step S31 is repeated.

At step S41 in FIG. 7, the distance difference criterion determining unit 46 obtains the distance information from the counter 35 and, every minute as a predetermined time interval σ, calculates the running distance from the start of running in the NVRAM 39. In the "distance difference" column of the "running state recording table (Table 1)" (step S42).

Then, the distance difference criterion determining unit 46
In the “reference table (Table 2)” stored in advance in the AM 39, the data (reference) in the “distance difference” column for three data numbers (Nσ-1, Nσ, Nσ + 1) including before and after the data number Nσ (Step S43), and if at least one of the differences is less than the predetermined allowable tolerance d2, the warning signal for the traveling distance is not output (the process proceeds from Step S44 to Step S46). ), Data numbers including before and after in the “reference table (Table 2)” (Nσ-1, Nσ, Nσ + 1)
If the value of the difference is equal to or greater than the permissible tolerance d2 for all of the data, a warning signal about the mileage is output to the display driver 31 assuming that a course out has occurred (step S45). Then, after the elapse of the predetermined time interval σ (step S46), the processing operation from step S41 is repeated.

The "speed", "TURN", "azimuth" and "distance difference" calculated or recognized by the respective judgment sections of the route suitability judgment means 42 and recorded in the "running state recording table (Table 1)". The data at the time when the signal from the ignition switch provided through the input I / F 32 is turned off after the vehicle reaches the destination, or the stop (switch-off) signal of the operation monitor in the vehicle display device At the time when is input, each data number N together with the data of the “reference table (Table 2)”
The average or the appearance frequency probability is calculated again for each σ, and is updated and recorded in the “reference table (Table 2)”.

Here, the NVRAM 39 rewrites each data in the "running state recording table (Table 1)" at a high speed, and also stops the operation of the ignition switch and the operation monitor of the vehicle display device as described above. The NVRAM configured with two storage cells per binary digit is used because it is necessary to keep the record of the “reference table (Table 2)” even at the time when Thus, one of the two memory cells is a volatile cell similar to a static RAM and performs high-speed processing, and the other is a nonvolatile cell for storing information and keeps recording even after the power is turned off. .

Each of the elements 41 to 4 in the CPU 37 is
All 6 appear as functional elements that function in accordance with a software program stored in the ROM 38 in advance. Therefore, this vehicle display device includes the NVRAM 39, the vehicle speed sensor 34, the counter 35, the azimuth sensor 33, and the timer 36 as newly added hardware components as long as the CPU 37 and the ROM 38 which have been used before are used. And a vehicle speed sensor 34, a direction sensor 33, and a timer 36.
Is usually already mounted on a normal car, so if existing parts are used, NVRAM3
Only 9 should be newly installed, and the volumetric efficiency can be dramatically improved as compared with the case where a car navigation device is installed.

The operation of the vehicle display device having the above configuration will be described. First, the driving vehicle turns on the ignition switch, transmits a signal to start operation monitoring of the vehicle display device by a predetermined switch operation, and then starts driving the vehicle. The signal transmitted by the above operation is input to the CPU 37 through the input I / F 32.

Here, the vehicle speed sensor 34 detects the running speed of the vehicle, and after being converted into vehicle speed information by the counter 35, the vehicle speed reference determining unit 43 and the distance difference reference determining unit in the route suitability determining means 42 of the CPU 37. It is input to 46. The traveling direction of the vehicle detected by the direction sensor 33 is
It is input to the azimuth reference determination unit 45 in the route suitability determination unit 42. Further, the right / left turn information of the vehicle given through the input I / F 32 is given to the right / left turn reference determination unit 44.
Then, from the timer 36, time information from the start of traveling is input to each of the determination units 43 to 46 in the route suitability determination unit 42. In parallel with this, electric signals in the on / off state of various switches and sensors installed in various parts of the automobile are input to the vehicle state display control means 41 through the input I / F 32.

The vehicle state display control means 41 transmits various display control signals to the display driver 31, and displays the speedometer 3, the fuel gauge 4, the warning of running out of fuel 5 and the water temperature gauge of the engine coolant in the display panel 2. 6, a warning display 7 of the water temperature, a warning display of parking brake operation 8, an upper beam lighting display 9, a turn signal lighting display 10, an odometer 11
Is displayed.

The vehicle speed reference judging unit 43 in the route suitability judging unit 42 determines the instantaneously changing vehicle speed data provided from the counter 35 based on the time information given from the timer 36 at a predetermined time interval σ. The average speed value is calculated (step S11 in FIG. 4), and the average speed value is stored in the column of “speed” in the “running state record table (Table 1)” in the NVRAM 39 (step S12).
At the same time, in the “reference table (Table 2)”, data numbers (Nσ−1, Nσ) before and after the current data number Nσ
(Step S1) with reference to three data including
3), any of these data numbers (Nσ-1, Nσ,
Also in Nσ + 1), if the difference between the average speed values of both tables (Tables 1 and 2) is equal to or greater than the preset allowable tolerance d1 (step S14), the display driver deems that it deviates from the reference route (course out). A warning signal regarding the traveling speed is transmitted to the vehicle 31 (step S15). On the other hand, a plurality of data numbers (Nσ-1, Nσ, N
σ + 1), if the difference between the average speed values of both tables (Tables 1 and 2) is less than the preset allowable tolerance d1, an alarm signal about the traveling speed is sent to the display driver 31. Do not send.

In parallel with this, the right / left turn reference judging section 44
Is input I / F 32 as in step S21 in FIG.
From left to right, and stores the right / left turn information obtained within one minute as the predetermined time interval σ, for example, in the “TURN” column in the “running state record table (Table 1)” in the NVRAM 39. Then (step S22), the data is compared with the data in the "TURN" column in the "reference table (Table 2)" (step S23). Then, depending on the right (R), left (L), and straight ahead (F) appearing in each data number Nσ of the “running state recording table (Table 1)”, the right (R), left (L), or The appearance frequency probabilities in the “TURN” column of the “reference table (Table 2)” corresponding to straight ahead (F) correspond to any of the data numbers (Nσ−1, Nσ, Nσ)
+1) (step S2)
4) Assuming that the vehicle is out of the reference route (course out), a warning signal for turning left or right is transmitted to the display driver 31 (step S25). On the other hand, when at least one data (appearance frequency probability) among a plurality of data numbers (Nσ-1, Nσ, Nσ + 1) including the front and rear in the “reference table (Table 2)” is larger than zero, the display is performed. The warning signal for turning right and left is not transmitted to the driver 31.

The azimuth reference determining unit 45 obtains the azimuth information from the azimuth sensor 33 as in step S31 in FIG. 6, and calculates the average azimuth within one minute as the predetermined time interval σ in the NVRAM 39. It is stored in the column of "azimuth" in the "running state recording table (Table 1)" (step S32),
Referring to the data in the column of “azimuth” of the data numbers (Nσ−1, Nσ, Nσ + 1) including before and after that of the “reference table (Table 2)” (step S33), the data in both tables (tables 1 and 2) are referred to. If at least one of the differences is smaller than the predetermined allowable tolerance Δθ (step S34), the alarm signal for the azimuth is not output, and the data number (Nσ−1) including before and after in the “reference table (Table 2)”. , Nσ, Nσ + 1), if the difference is equal to or larger than the allowable tolerance Δθ, the display driver 31 determines that there is a course out.
(Step S3).
5).

Further, in step S41 in FIG. 7, the distance difference criterion determining unit 46 obtains the distance information from the counter 35, and calculates the distance traveled from the start of travel every minute as the predetermined time interval σ. Are stored in the column of "distance difference" in the "running state recording table (Table 1)" (step S4).
2), three data numbers (Nσ-1, Nσ, Nσ +) including before and after the data number Nσ in the “reference table (Table 2)”
With reference to the data in the column of “distance difference” for 1) (step S43), if at least one difference between the two tables (Tables 1 and 2) is less than the predetermined allowable tolerance d2 (step S44), the traveling distance is determined. Is not output, the data number (Nσ) including before and after in the “reference table (Table 2)”
If the difference is equal to or more than the permissible tolerance d2 for all data of (−1, Nσ, Nσ + 1), it is determined that a course-out has occurred, and an alarm signal about the traveling distance is output to the display driver 31 (step S45).

As described above, when an alarm signal is output from each of the determination units 43 to 46 to the display driver 31, the display driver 31 gives a signal to the course-out display unit 12 of the display panel 2 and accordingly, the course-out of the display panel 2 is performed. The display unit 12 displays that the vehicle is out of the course.

As described above, even if the conventional car navigation system with a large amount of data processing such as image processing is not used, a course out of a predetermined route assumed in the “reference table (Table 2)” can be performed. Can be easily transmitted to the driver, and substantially the same purpose as the route search in the car navigation device can be achieved only with the compact vehicle display device information. When the vehicle display device of this embodiment is used, the volumetric efficiency can be dramatically improved as compared with the case where a car navigation device is installed.

Also, after the above-described determination operation, the vehicle reaches the destination and the signal from the ignition switch provided through the input I / F 32 is turned off, or the operation monitor in the vehicle display device is stopped ( Switch-off) signal, the "speed", "TU" recorded in the "driving state record table (Table 1)"
RN "," azimuth "and" distance difference "
The average or the appearance frequency probability is recalculated for each data number Nσ together with the data of the “reference table (Table 2)” and updated and recorded in the “reference table (Table 2)”. The reference table (Table 2) "can be updated successively. Therefore, in the judgments by the judgment sections 43 to 46 of the route suitability judging means 42, the reference data stored in the "reference table (Table 2)" is flexible with respect to a slight change in the route or a delay in the operation time. To make it possible to make the subsequent judgment flexible.

In the above embodiment, “speed”, “T”
URN, “azimuth” and “distance difference” are all determined to determine whether or not the vehicle is out of the course by determining all of the four types of traveling conditions. It doesn't mean you have to. Therefore, depending on the type of the vehicle, any of these judgments may be omitted, and as long as they are designed by appropriately combining them, all means within the scope of the present invention can be used as means for achieving the above object. Of course, it works.

In the above embodiment, the appearance frequency probabilities of “F”, “L” and “R” are stored in the “TURN” column of the reference table (Table 2). The accumulated value of the number of appearances may simply be stored.

Further, in the above-described embodiment, the case where one specific operation route is assumed has been described. However, two or more specific operation routes are assumed in advance, and all of them are switched by a switch operation or the like. The above operation may be performed for each of them.

[0058]

According to the invention as set forth in claims 1 to 6, in an automobile which travels on a specific operation route every time, for example, the average value of the traveling speed of the automobile (claim 3),
Any one of various types of traveling states related to various course-outs such as presence / absence of right / left turn (Claim 4), average value of traveling direction (Claim 5), and traveling distance from the start of traveling (Claim 6). One or more are recognized by averaging or the like, and compared with a reference state stored in a reference table in a storage device at predetermined time intervals. The alarm signal is output to the display panel to notify the display.
When the vehicle is traveling on a route out of the specific operation route assumed in the reference table, the driver can easily be notified of the fact. In particular, such information is sent to a traveling speedometer,
Since the display is performed through a display panel that displays general display items that are general vehicle driving information such as a fuel gauge, it is possible to notify a course out without using a car navigation device that handles large-capacity data. Therefore, the volume efficiency in the automobile can be improved because the car navigation device can be omitted.

Further, when a specific type of traveling state related to the car leaving the course is recognized at predetermined time intervals, and the recognized specific type of traveling state is compared with the reference state stored in the reference table, Not only the reference state associated with the recognition time point but also the reference state associated with the time point before and after the recognition time point is also compared and collated. Even if it is done, this will not be immediately judged as a course out. Therefore, it is possible to make an efficient determination by giving a certain tolerance to the determination.

According to the second aspect of the present invention, when the vehicle arrives at the destination on the specific operation route, the reference state in the reference table is cumulatively corrected based on the recognized traveling state of the vehicle. In this case, the reference data stored in the reference table can be flexibly changed in response to a slight change in route or a delay in operation time. There is an effect that flexibility can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a vehicle display device according to one embodiment of the present invention.

FIG. 2 is a front view showing a display panel.

FIG. 3 is a block diagram showing a vehicle state display control unit and a route suitability determination unit in a CPU.

FIG. 4 is a flowchart showing an operation function of a vehicle speed reference determination unit in a route suitability determination unit.

FIG. 5 is a flowchart showing an operation function of a right / left turn reference determining unit in the route suitability determining unit.

FIG. 6 is a flowchart showing an operation function of an azimuth reference determining unit in the route suitability determining unit.

FIG. 7 is a flowchart showing an operation function of a distance difference criterion determination unit in a route suitability determination unit.

FIG. 8 is a front view showing a display panel of a conventional vehicle display device.

FIG. 9 is a block diagram showing a general car navigation device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle display device 2 display panel 12 course-out display unit 20 car navigation device 21 autonomous navigation control unit 22 antenna 23 GPS receiver 24 GPS control unit 25 display device 26 image editing unit 27 optical disk device 28 destination input unit 29 route search unit Reference Signs List 31 display driver 32 input I / F 33 direction sensor 34 vehicle speed sensor 35 counter 36 timer 37 CPU 38 ROM 39 NVRAM 41 state display control means 42 route suitability determination means 43 vehicle speed reference determination unit 44 right / left turn reference determination unit 45 direction reference determination unit 46 Distance difference reference judgment unit

Claims (6)

[Claims] 1. A vehicle display device which is installed in a dashboard in front of a driver's seat of a vehicle and displays various information, and is general vehicle driving information such as a vehicle speedometer and a fuel gauge. A display panel for displaying general display items and a course-out notification item for notifying that the traveling position of the vehicle deviates from the specific operation route; a driving circuit for displaying and driving the display panel; and various parts of the vehicle. An input interface for receiving electric signals from the attached switches and sensors, traveling state detecting means for detecting a specific type of traveling state related to the car's course-out, and timing means for outputting time data; The input interface, the traveling state detecting means and the time measuring means based on the signal from the execution of a predetermined arithmetic processing as appropriate, the A control unit for transmitting a display signal about a matter to be displayed on the display panel to the drive circuit; and a memory for temporarily recording various data processed by the control unit and keeping the various data even after the operation is completed. A reference table in which the storage device stores a reference state at a predetermined time interval for the specific type of traveling state corresponding to the specific operation route from the start of traveling of the vehicle to a predetermined destination. The control unit outputs a display signal to the drive circuit so that the display panel displays the general display items based on signals from the switches and the sensors obtained through the input interface. Vehicle state display control means, and recognizes the specific type of running state of the vehicle detected by the running state detecting means at each of the predetermined time intervals, The recognized traveling state of the specific type is compared with the reference state stored in the storage device in association with the recognition time and the time before and after the recognition time, and the traveling state at the recognition time is In the case where the reference state corresponding to the recognition time point and the time points before or after the recognition state does not match or exceeds a predetermined allowable range centered on the reference state, the traveling position of the car deviates from the specific operation route. A display device for a vehicle, comprising: a route suitability determining unit that outputs a warning signal related to a course-out notification item to the drive circuit upon determining that the vehicle is out of course. 2. The display device for a vehicle according to claim 1, wherein the route suitability determination means is recognized at each of the predetermined time intervals when the vehicle arrives at a destination on the specific operation route. A vehicle display device having a function of cumulatively correcting the reference state based on the specific type of running state of the vehicle and updating and storing the reference state in the storage device. 3. The display device for a vehicle according to claim 1, wherein the traveling state detection unit includes at least a traveling speed detection unit that detects a traveling speed of an automobile. In the reference table, at least an average value of the average speed of the vehicle in the past traveling at the predetermined time interval is stored as a reference speed value, and the route suitability determination unit is configured to detect the vehicle speed detected by the traveling speed detection unit. The running speed of the vehicle is recognized by performing an average operation at each of the predetermined time intervals, and the recognized average speed value is stored in the storage device in association with the recognized time and the time before and after the recognized time. The speed value is compared with the average speed value at the recognition time and the speed difference between the recognition time and the reference speed value corresponding to a time before or after the recognition time is equal to or more than a predetermined allowable tolerance. Wherein the vehicle has a vehicle speed reference determination unit that determines that the traveling position of the vehicle has deviated from the specific operation route and outputs an alarm signal related to a course-out notification item in the drive circuit. Display device. 4. The display device for a vehicle according to claim 1, wherein the traveling state detecting means includes at least right / left turn detecting means for recognizing a right / left turn of the vehicle. The reference table stores at least an appearance frequency probability or a cumulative value in a past run regarding the presence or absence of a right / left turn at each predetermined time interval as a reference frequency value. The presence / absence of the detected right / left turn of the car is recognized at each of the predetermined time intervals, and the occurrence frequency probability or the accumulation stored in the storage device in association with the recognition time and the time before or after the recognition time is stored. With reference to the value, when the right / left turn is recognized at the recognition time point, the appearance frequency probability corresponding to the recognition time point and the time points before or after the recognition time point or the accumulation If the value is zero, it is determined that the traveling position of the car has deviated from the specific operation route, and the drive circuit has a right / left turn reference determination unit that outputs an alarm signal related to a course-out notification item. Characteristic display device for vehicles. 5. The display device for a vehicle according to claim 1, wherein the traveling state detecting unit includes at least an azimuth detecting unit for detecting a traveling azimuth of the vehicle, and The reference table stores at least an average value of the traveling direction of the vehicle at predetermined time intervals in the past traveling as a reference direction value, and the route suitability determining unit determines whether or not the vehicle travels detected by the direction detecting unit. The azimuth is calculated by averaging every predetermined time interval and recognized, and the recognized average azimuth value and the reference azimuth value stored in the storage device in association with the recognition time and the time before and after the recognition time. When the azimuth difference between the average azimuth value at the recognition time and the reference azimuth value corresponding to the recognition time and the time before and after the recognition time is equal to or larger than a predetermined allowable tolerance, A display device for a vehicle, comprising: an azimuth reference judging unit for judging that a running position of an automobile deviates from a specific operation route and outputting an alarm signal relating to a course-out notification item in the drive circuit. 6. The display device for a vehicle according to claim 1, wherein the traveling state detection unit includes at least a traveling speed detection unit that detects a traveling speed of an automobile. In the reference table, at least for each predetermined time interval, an average value in the past traveling of the traveling distance from the start of traveling of the vehicle is stored as a reference distance value, and the route suitability determining unit includes the traveling speed detecting unit. Recognize the travel distance from the start of travel of the vehicle at each of the predetermined time intervals based on the travel speed of the vehicle detected in step 2, and correspond to the recognized travel distance, the recognition time, and the time before and after the recognition time. The reference distance value stored in the storage device is compared with the travel distance at the recognition time and the travel time at the recognition time and the time before and after the recognition time. If the distance difference from the reference distance value is equal to or greater than a predetermined allowable tolerance, it is determined that the running position of the vehicle has deviated from the specific operation route, and an alarm signal relating to a course-out notification item is output to the drive circuit. A display device for a vehicle, comprising a distance difference criterion determining unit.