JPH0743800B2 - Vehicle intercommunication device - Google Patents

Description

The present invention relates to an intercommunication device for vehicles such as automobiles.

(Prior Art) Generally, in the case of so-called touring in which a plurality of automobiles travel together, there is a demand for exchanging information between the automobiles. With the spread of personal wireless devices in recent years,
It is possible to use it.

By the way, in the case as described above, considering what kind of information needs to be exchanged, it is necessary to know whether or not the own vehicle is traveling so as not to separate from the other vehicle. To know the relationship with the position.

As a result, in the communication using the personal wireless device, the communication is centered on hearing by voice, and considering that it is difficult to express the position of the car by voice, it is not possible to sufficiently cope with the above request. However, there is a problem in the ability to follow the target other vehicle.

Further, for example, as described in Japanese Utility Model Application Laid-Open No. 57-196318, while continuously storing the data of the own vehicle position which changes from moment to moment, the continuous running locus of the own vehicle is displayed on the screen of the display device. Things are known.

(Problems to be Solved by the Invention) However, in such a device, it is not possible to know the position of the other vehicle in the case of the above-mentioned touring and the like, so that the above requirement cannot be satisfied.

According to the present invention, by automatically enlarging and reducing the map according to the distance between the target vehicle (other vehicle) and the own vehicle,
The object of the present invention is to accurately grasp the positional relationship between the target vehicle and the own vehicle and to easily follow the target vehicle.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a target vehicle position detecting means for detecting the current position of a predetermined target vehicle and a current position determining means for detecting the current position of the own vehicle. A screen display device for displaying the current positions of the own vehicle and the target vehicle on a map of a predetermined scale by receiving signals from the target vehicle position detecting means and the current position determining means, and the distance between the own vehicle and the target vehicle. Accordingly, map scale control means is provided for automatically changing the scale of the map so that both the own vehicle and the target vehicle can be displayed on the screen display device.

(Operation) A description will be given with reference to FIG.

The receiving device 1 receives a radio wave signal emitted from another vehicle, which is a target vehicle, via the receiving antenna 2, the radio wave signal is demodulated by the signal demodulating means 3, and the position of the other vehicle constituting the other vehicle position detecting means. The display control means 4 outputs the target vehicle position display signal to the display driver 5. On the other hand, the current position discriminating means 6 (current position discriminating means) for detecting the present position of the vehicle.
Is output to the display driver 5 as a vehicle position display signal by the automatic position display control means 7. Further, the map scale control means 8 for changing the scale of the map according to the distance between the own vehicle and the target vehicle by the output signals of the signal demodulating means 3 and the current position discriminating device 6 sends the map scale control signal to the display driver. Output. And the display driver 5
However, according to the target vehicle position display control signal, the own vehicle position display control signal and the map scale control signal, the position of the target vehicle and the position of the own vehicle are displayed on the screen display device 9 with respect to the map of a predetermined scale.

Further, the output signal of the current position discriminating device 6 is the signal modulating means 10
Is modulated into a radio signal by the transmitter 11 and the transmitter antenna 12
Output via.

(Example) Hereinafter, the Example of this invention is described based on drawing.

An intercommunication device for a vehicle, the overall configuration of which is shown in FIG. 2, has a receiver A for receiving a radio signal from a target vehicle and a transmitter B for transmitting a radio signal to other vehicles including the target vehicle.

The receiving unit A receives the radio wave signal emitted from the transmitting antenna of the target vehicle via the receiving antenna 1
A reception data demodulating device which is a signal demodulating means 3 for demodulating a radio wave signal received by the receiving device 1, and a reception data buffer 21 which temporarily stores another vehicle position signal which is an output signal of the reception data device. Is equipped with.

Further, for example, an azimuth sensor 22 such as a geomagnetic sensor for detecting the traveling direction of the vehicle, a distance sensor 23 for detecting the traveling distance of the vehicle, an azimuth signal from the azimuth sensor 22 and a distance signal from the distance sensor 23 The current position discriminating device 6 is constituted by the current position calculating means 24 for detecting the position.

Reference numeral 25 denotes a control device which receives the target vehicle position signal from the reception data buffer 21 and outputs the target vehicle position display signal, and another vehicle position display control means 4 which receives the own vehicle position signal from the current position calculation means 24. The distance between the own vehicle and the target vehicle is calculated by the own vehicle position display control means 7 which issues the vehicle position display signal, the target vehicle position signal and the own vehicle position signal, and is stored in the storage device 26 accordingly. The optimum map is selected from the existing map data, the map scale is changed, and the map scale control means 8 for issuing a map scale control signal and the target vehicle position display signal, the own vehicle position display signal and the map scale control signal are used. , A CRT or the like, and a display driver 5 for displaying the current positions of the target vehicle and the own vehicle together with a map of a predetermined scale on the screen.

On the other hand, the transmitter B transmits the own vehicle position signal to the control device 25.
A transmission data buffer 28 that receives data via
A transmission data modulator as a signal modulator 10 for modulating the own vehicle position signal into a radio signal as transmission data,
A transmission device (11) that emits the radio signal via a transmission antenna (12) without directing it to another vehicle.

Next, the flow of processing of the control device 25 will be described with reference to FIG.

When started, the current position of the vehicle (vehicle position) is read by the current position determining device 7 at step S _1, step
The vehicle position is written in the transmission data buffer 28 in S ₂ .

On the other hand, in step S ₃ , the position data of the target vehicle, which is the received data, is read from the received data buffer 21.

Then, depending on the vehicle position in step S _4, and select the map as described later, in step S _5, as shown in Figure 4,
The current positions P ₁ and P ₂ of the own vehicle and the target vehicle are displayed on the screen of the screen display device 8 together with the map.

Examples of map selection in step S ₄ along the FIG. 5 through FIG. 9 will be described.

-Example 1-In FIG. 5, when the map selection is started, step S ₁₁
In the vehicle is equal to or within the current map, but immediately if YES the process proceeds to step S _14, if NO step S
The protruding direction of the own vehicle is detected in ₁₂ and the map of the protruding direction is read from the storage device 26 in step S ₁₃ and then the process proceeds to step S ₁₄ . For example, as shown in FIG. 6, with respect to the map C ₁ on which the vehicle position P ₁ is displayed, eight maps C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ around the map C _1. , consider the C _9, for example, the vehicle is assuming that moves to the position P ₁ 'of the map C _3, to select the direction of the map C ₃ having moved the vehicle.

Step S ₁₄ purpose vehicle in is equal to or within the current map, if YES is not map change, in the case of NO can be displayed together with the position of the even vehicle position purpose vehicle in step S ₁₅ Read the reduced map and change the map scale.

- As shown in Example 2 FIGS. 7 and 8, when the map selection is started, first, the step S ₁₁ of Example 1 in step S ₂₁ to S ₂₅
To S ₁₅ performs the same processing as.

Then, the distance L on the screen between the vehicle and the target vehicle calculated in step S _26, the distance L is set in step S ₂₇ the distance L ₁
If it is YES, the map is not changed, but if NO, the map is enlarged in step S ₂₈ , that is, the enlarged map is read from the storage device 26. The above set distance L ₁
As shown in FIG. 8, since the own vehicle and the target vehicle are close to each other at a preset distance according to the size of the screen of the screen display device 9, the map is enlarged to make it easier to see the map. It has been set.

- As shown in Example 3 Fig. 9 and Fig. 10, the map selection is started, first, the step S ₁₁ of Example 1 in step S ₃₁ to S ₃₃
To S ₁₃ performs the same processing as the distance between the vehicle and the target vehicle at Likewise screen in step S ₂₆ of Example 2 in step S ₃₄ L
To calculate.

Then, the distance L is determined whether enlargement preset distance L ₂ is less than in the step S _35, if YES while larger map in step S _36, and if NO then proceeds to step S _37.

Step S ₃₇ the distance L is determined whether reduction larger than the set distance L _3, if YES while reducing the map in step S _38, in the case of NO do not map change.

The map enlargement / reduction in steps S ₃₆ and S ₃₈ is performed by reading the enlarged map / reduced map storage device 26 as in the first and second embodiments. In that case, as shown in FIG. In addition, since the distance L is scaled with hysteresis so that the distance L becomes the distance L _S (<L ₂ ) and L _K (<L ₃ ), the distance L may fluctuate near the set distances L ₂ and L _3. Frequent screen changes are prevented.

As shown in FIG. 11, the flow of processing in the receiving section A determines whether or not there is a signal from the target vehicle in step S ₄₁ , and if NO, repeats this. On the other hand, if YES,
Step S ₄₂ in receiving the radio signal, demodulates the signal in step S _43, received in step S ₄₄ the data buffer 21
Is written in as position data of the target vehicle, and then the process returns to step S ₄₁ . The signals from each vehicle are distinguished by changing the frequency, for example.

Processing flow at the transmission part B, as shown in FIG. 12, first, whether there is a change in the transmission data buffer 28 in step S ₅₁ is judged, and if NO repeating this. On the other hand, If YES, it modulates the vehicle position signal to be transmitted data at step S _52, transmitted in step S _53, step S ₅₁
Return to.

Incidentally, an example of the data array m of the transmission / reception data is as shown in FIG. The D in the array m ₁ is a symbol indicating the start of data, the array m ₂ indicates the east longitude, and the array m ₃ indicates the north latitude. Therefore, in the example of Fig. 9, the vehicle position is 138 ° 63'E, 4 ° N
It is 1 degree 02 minutes.

In the above embodiment, the target vehicle position and the own vehicle position are only displayed on the screen of the screen display device 9, but the positions of other vehicles other than the target vehicle may be displayed together.

Further, although the map is also displayed on the screen of the screen display device 9, it is not always necessary and only the own vehicle position and the other vehicle position are displayed on the screen. May replace the map.

(Effects of the Invention) As described above, the present invention uses the map scale control unit according to the distance between the target vehicle and the own vehicle so that both the own vehicle and the target vehicle can be displayed on the screen display device. Since the map is automatically enlarged or reduced, the positional relationship between the target vehicle and the own vehicle can be accurately grasped, and the target vehicle can be easily followed.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the configuration of the present invention, FIG. 2 is an overall configuration diagram of an intercommunication device for a vehicle which is an embodiment, and FIG. 3 is a flow chart showing a processing flow of the device shown in FIG. FIG. 5 is an explanatory view of an example in which the positions of the own vehicle and other vehicles are shown on a map, FIG. 5 is a flowchart of the first embodiment of map selection, FIG. 6 is an explanatory view of map selection, and FIG. 7 is a map. FIG. 8 is a flow chart of selection example 2, FIG. 8 is an explanatory diagram of set distance, FIG. 9 is a flow chart of map selection example 3, and FIG. 10 is an explanatory diagram showing a hysteresis loop in map enlargement / reduction processing. , FIG. 11 and FIG. 12 are flow charts showing the flow of processing of the receiving unit and the transmitting unit, respectively, and FIG. 13 is an explanatory diagram showing an example of an array of transmitted and received data. 4 ... Other vehicle position display control means, 6 ... Current position determination device (current position determination means), 7 ... Own vehicle position display control means,
8 ... Map scale control means, 9 ... Screen display device,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-107200 (JP, A) JP-A-58-206914 (JP, A) JP-A-58-223015 (JP, A) Actual development Sho-60- 5599 (JP, U)

Claims (1)

[Claims] 1. A target vehicle position detecting means for detecting a current position of a predetermined target vehicle, a current position determining means for detecting a current position of the own vehicle, and signals from the target vehicle position detecting means and the current position determining means. Screen display device that displays the current positions of the own vehicle and the destination vehicle on a map of a predetermined scale, and both the own vehicle and the destination vehicle display device according to the distance between the own vehicle and the destination vehicle. And a map scale control unit for automatically changing the scale of the map so that the map can be displayed on the intercommunication device of a vehicle.