JPH0795360B2 - Inter-vehicle signal transmission system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-vehicle signal transmission system, and more particularly to a system for performing signal transmission between a plurality of vehicles forming a group.

<Prior Art> Conventionally, the number of vehicles has increased and traffic congestion has become severe. In recent years, the popularity of vehicles has increased, and vehicles for business use form a group, or vehicles of family members and friends form a group, often heading for the same destination.

Therefore, it is less likely that the above-mentioned vehicle group can travel to the destination in a lump.

Therefore, by carrying a transceiver etc. between the vehicles that make up the group and transmitting the traveling data such as right turn, left turn, straight ahead, etc., it is possible to prevent the following vehicles from making a wrong course, I was making sure to reach my destination.

<Problems to be Solved by the Invention> In the inter-vehicle signal transmission system configured as described above, since the transceiver and the like are regulated by the Radio Law and the like, there is a problem that the signal transmission possible distance cannot be increased too much. . More specifically, it is extremely rare that all vehicles belonging to a group can travel in a lump due to the influence of traffic congestion, and it is usually affected by traffic signals and vehicles other than the group. As the mileage increases, the distance between the leading vehicle and the following vehicle increases, and the signal transmission distance is exceeded.

Therefore, if only the driver of the leading vehicle knows the route to the destination, the following vehicle will make a wrong course.

In order to prevent such a situation from occurring, when the signal transmission distance is exceeded, it is sufficient to stop the leading vehicle and wait until the following vehicle approaches, but once in any place. Not only is there no guarantee that the signal can be stopped, but it is difficult to determine if the signal transmission distance has been exceeded.

Therefore, it is not enough to take the above measures.

<Object of Invention> The present invention has been made in view of the above problems,
An object of the present invention is to provide an inter-vehicle signal transmission system that can reliably transmit signals between vehicles regardless of the distance between vehicles belonging to a group.

<Means for Solving Problems> The inter-vehicle signal transmission system of the present invention for achieving the above object is a signal management device arranged at a predetermined position of the road network so as to cover at least the vehicle traveling range, A signal processing device mounted on a vehicle, wherein the signal management device includes a first receiving unit for receiving a signal including data transmitted from the vehicle, and a signal received by the first receiving unit. A storage unit that stores the stored data, a read control unit that repeatedly reads the data stored in the storage unit for a predetermined time, and a first transmission unit that transmits the data read by the read control unit to an unspecified vehicle. And a second transmitting unit for transmitting a signal including data to be transmitted to the signal management apparatus, and a signal transmitted from the signal management apparatus. Do And a display unit for displaying the data included in the signal received by the second receiving unit.

However, the signal management device may be arranged in the vicinity of the intersection and can cover at least the intersection, or the signal management device may be arranged in a place where the intersection does not exist and at least the arrangement place. It may be capable of covering the entire width of the road directly facing.

Further, the second transmitting unit transmits a signal further including a vehicle group-specific ID code composed of a plurality of vehicles to be subjected to vehicle signal transmission to the signal management device, and the storage unit is The data included in the signal transmitted from the second transmission unit is stored for each ID code, and the read control unit identifies the data stored in the storage unit as an ID.
The code is repeatedly read together with the code for a predetermined period, the first transmitting unit transmits the data and the ID code read by the read control unit to an unspecified vehicle, and the second receiving unit. The data corresponding to the ID code that matches the ID code unique to the vehicle group to which the vehicle belongs may be extracted from the data transmitted from the first transmission unit and supplied to the display unit. .

<Operation> In the inter-vehicle signal transmission system configured as described above, for example, when the same data is desired to be transmitted to an unspecified vehicle, the data to be transmitted is transmitted as a signal to the signal management device through the second transmission unit. On the other hand, in the signal management device, the signal is the first
When received through the receiving unit, the data included in the received signal is stored in the storage unit. Then, in the signal management device, the data stored in the storage unit is repeatedly read by the read control unit for a predetermined period. The read data is transmitted as a signal to the region including at least the vehicle traveling range through the first transmitting unit. An unspecified vehicle that has reached the area including the vehicle travel range can receive the transmitted signal. In the signal processing device for an unspecified vehicle, the data included in the received signal can be displayed on the display unit. However, the display in this case is not limited to an audible display, and may be a visual display or a combination of both displays.

When the signal management device is arranged in the vicinity of the intersection, a signal indicating a right turn, a left turn, etc. can be transmitted to the following vehicle, and conversely, the signal management device does not have the intersection. In the case of being placed in a place, a signal indicating a stop-by place, a rest place, etc. can be transmitted to the following vehicle.

In addition, in the case of transmitting the ID code unique to the vehicle group to the unspecified vehicle together with the data from the first transmission unit of the signal management device,
In the vehicle signal processing device, data corresponding to an ID code that matches the ID code unique to the vehicle group to which the vehicle belongs is extracted and supplied to the display unit. Therefore, on the display,
Only data relating to the vehicle group to which the vehicle belongs is displayed.

Further, if the storage unit sets the storage time for each signal of each vehicle group for which vehicle-to-vehicle signal transmission should be performed, it is applicable after a sufficient time has passed for all the vehicles of each vehicle group to finish passing. It is possible to store signals for different vehicle groups instead of the signals for vehicle groups, and it is possible to store many inter-vehicle signals in a storage unit having a limited capacity.

Furthermore, if the running data supply unit automatically detects the running state of the vehicle, encodes it, and supplies it to the transmitting unit, it automatically detects the running state of the vehicle and encodes it. And can be transmitted to the signal management device.

<Examples> Hereinafter, detailed description will be given with reference to the accompanying drawings illustrating examples.

FIG. 3 is a schematic diagram showing an embodiment of an inter-vehicle signal transmission system of the present invention, and a sign having a signal management device (3) (see FIG. 1) at an intersection (2) of a road network (1). The post (3 ') is installed and the vehicle (4) is a sign post (3').
The signal from the signal processing device (5) (see FIG. 2) mounted on the vehicle (4) is transmitted to the sign post (3 ′) or the sign post (3 ′) from The signal can be transmitted to the signal processing device (5).

FIG. 1 is a block diagram showing the electrical configuration of the signal management device (3), which selectively transmits the first transmission to the antenna (31) via a switching device (31 ') that periodically switches. Unit (32) and first receiving unit (33)
And the signal from the receiving section (33) is supplied to the memory (35) through the write control section (34).
Further, the read control section (36) supplies the signal read from the memory (35) to the transmission section (32). The transmitter (32) modulates a carrier wave having a predetermined frequency with a signal to be transmitted, and the receiver (33) demodulates the signal received through the antenna (31) to obtain a vehicle. Only the signals to be transmitted between them are extracted. Further, the writing control section (34) receives the signal from the receiving section (33), generates address data indicating an address of the memory (35) in which data should be stored, and is instructed by the address data. The data is stored in the part. Further, the read control section (36) includes a switch (31 ').
The stored data is read from the memory (35) in conjunction with the switching operation of.

FIG. 2 is a block diagram showing an electrical configuration of the signal processing device (5), and a transmitting unit (52) which is a second transmitting unit is selectively provided to the antenna (51) via a switch (51 ′). ) And a receiving section (53) which is a second receiving section, and further supplies a signal from the receiving section (53) to the display section (54),
Furthermore, the signal from the traveling data supply unit (55) is transmitted to the transmission unit (5
2) is being supplied. The switching device (51 ') is manually operated, and in the case of a leading vehicle, the transmission unit (52).
Side, in the case of a following vehicle, it is set to the receiving section (53) side. The transmitter (52) modulates a carrier wave of a predetermined frequency with a signal from the travel data supplier (55), and the receiver (53) receives the signal received through the antenna (51). Is demodulated to extract only signals to be transmitted between vehicles.

Further, the display section (54) has a memory (54a) for storing the demodulated signal from the receiving section (53) for a predetermined time, and a memory (54a).
Read-out control section (54b) for reading out the contents of the speaker, a speaker (54c) to which a read-out signal is supplied, a CRT display (54d)
And the travel data supply section (55) has
Microphone (55a) and microphone (5
It has a memory (55b) for storing the signal from 5a) for a predetermined time, and a read control section (55c) for periodically reading the contents of the memory (55b) at relatively short intervals.

The operation of the inter-vehicle signal transmission system having the above configuration is as follows.

When a group consisting of a plurality of vehicles (4) travels on the road network (1) aiming at a predetermined destination, the signal processing device (5) of the leading vehicle is switched by the switch (51 '). The antenna (51) and the transmitter (52) are connected to each other, and the signal processing device (5) of the following vehicle is connected to the antenna (51) and the receiver (53) by the switch (51 '). State. Then, in the leading vehicle, voice information such as a right turn, a left turn, and a straight line is input through the microphone (55a) in a state of approaching the crossing point (2) where it is necessary to inform the following vehicle of the route. This voice information is temporarily stored in the memory (55b) and periodically read by the read control unit (55c) at relatively short intervals. Then, the read signal is supplied to the transmitting section (52) to output the modulated signal, and the antenna (5
1) Send through.

The signal transmitted through the antenna (51) is received by the antenna (31) of the signal management device (3) when it reaches a predetermined area based on the sign post (3 ').

The signal received by the antenna (31) is transferred to the switch (3
1 ') is supplied to the receiving section (33) and demodulated at the timing when it is switched to the receiving section (33) side. Then, the demodulated signal can be written into the memory (35) at the address designated by the writing control section (34).

After that, the read control unit (36) periodically reads data from the memory (35) for a predetermined time at the timing at which the switch (31 ') is connected to the transmission unit (32), and the transmission unit (32). ), The modulated signal is converted into a modulated signal through the antenna (31), and the modulated signal is repeatedly transmitted to a region R in a predetermined range including the intersection (2).

When the following vehicle reaches the area R, the signal transmitted through the antenna (31) can be received by the antenna (51), demodulated by the receiving section (53) and supplied to the display section (54). . In this display section (54), the demodulated signal is stored in the memory (54a) for a predetermined time, and the read control section (5
4b) reads the contents of the memory (54a) and supplies it to the speaker (54c) through the drive circuit (54e), and the CRT display (54d) through the data conversion circuit (54f) and the drive circuit (54g). The data from the leading vehicle can be audibly and visually displayed.

Therefore, the following vehicle can reach the destination exactly along the same route as the leading vehicle.

Although the voice signal is used as the modulation signal in the above embodiment, a digital signal obtained by appropriately shaping the voice signal may be used, or a digital code signal corresponding to a right turn, a left turn, etc. may be used. Alternatively, an angle sensor or a direction sensor may be mounted on the vehicle, and modulation may be performed by an output signal from the angle sensor or the direction sensor to automate the work of inputting route information.

Further, in the above embodiment, only the route information is simply transmitted, but for example, a different ID code is assigned to each vehicle group so that inter-vehicle signal transmission can be performed without confusion for each vehicle group. Is also possible. More specifically, in the vehicle on the transmission side, the ID code unique to the vehicle group to which the vehicle belongs is added to the route information to be transmitted and transmitted to the signal management device (3). The received route information is stored for each ID code in the memory (35) of the signal management device (3). The signal management device (3) repeatedly transmits all of the stored route information to the unspecified vehicle over a predetermined period. On the other hand, in the vehicle on the receiving side, only the route information corresponding to the ID code that matches the ID code unique to the vehicle group to which the own vehicle belongs is extracted from the route information transmitted from the signal management device (3) and displayed. Supplied to the section (54). As a result, in the vehicle on the receiving side, only the route information of the vehicle group to which the own vehicle belongs is displayed on the display section (54). Furthermore, in order to be able to transmit necessary signals to multiple vehicle groups respectively, a data frame is set for the route information, and the data frames for multiple vehicle groups are time-divided. The signals can be coded side by side and transmitted as one signal. In addition, a plurality of transmission frequencies of the signal processing device (5) and the transmission frequency of the signal management device (3) are prepared, and the signal processing device (5 It is also possible that the signal management device (3) receiving the request signal from (1) outputs a signal designating a frequency that is not currently used, and then performs signal transmission at the designated frequency.

The above modification can be easily implemented by applying a technique similar to the technique currently used in the field of mobile communication.

Further, the time for continuing to transmit a signal from the signal management device (3) is sufficient until all the succeeding vehicles have passed, and is no longer necessary after that, for example, in the signal management device (3) A plurality of types of time can be selected in advance, and the signal processing device (5) transmits the data designating the time together with the route information to promote the effective use, and at the end. When the vehicle is clear, it is possible to transmit the stop command signal after the signal processing device (5) of the vehicle receives the required route information signal. In addition, the leading vehicle transmits the number-of-vehicles information in the group together with the route information, and the reception confirmation signal is transmitted every time the following vehicle receives the route information, and the signal management device (3) receives the number-of-vehicles information It is also possible to subtract each time and to stop the transmission of the route information when it becomes 0. However, you can stop sending the route information in the memory (35).
It is preferable to erase the corresponding data stored in.

Further, according to the present invention, it is possible to transmit not only the route information at the intersection but also the information when taking a break on the way, the landmark information near the final destination, etc. It becomes possible to make it more reliable.

<Effects of the Invention> As described above, according to the present invention, data is repeatedly transmitted from a signal management device to an unspecified vehicle for a predetermined period.
Therefore, for example, when it is desired to transmit route information from a leading vehicle to a following vehicle among a plurality of vehicles forming a vehicle group, even if the distance between the leading vehicle and the following vehicle is large, it is possible to ensure The route information can be transmitted to the following vehicle.
Therefore, all the vehicles belonging to the vehicle group can surely reach the destination.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an electrical configuration of a signal management device, FIG. 2 is a block diagram showing an electrical configuration of a signal processing device, and FIG. 3 is a schematic diagram showing an inter-vehicle signal transmission system. Fig. (1) ... Road network, (2) ... Crossing point, (3) ... Signal management device, (4) ... Vehicle, (5) ... Signal processing device, (31) (5
1) ... antenna, (32) (52) ... transmitting part, (33) (53)
... Reception unit, (35) ... Memory, (36) ... Read control unit, (5
4) ... Display, (55) ... Running data supply

Claims (6)

[Claims] 1. A signal management device arranged at a predetermined position of a road network so as to cover at least a vehicle traveling range, and a signal processing device mounted on the vehicle, the signal management device transmitting from the vehicle. A first receiving unit for receiving a signal including data to be stored, a storage unit for storing the data included in the signal received by the first receiving unit, and the data stored in the storage unit for a predetermined time. The signal processing device includes a read control unit that reads repeatedly and a first transmitting unit that transmits the data read by the read control unit to an unspecified vehicle. The signal processing device includes data to be transmitted. A second transmission unit for transmitting a signal to the signal management device, a second reception unit for receiving the signal transmitted from the signal management device, and a signal received by the second reception unit. Display data Headway signal transmission system characterized in that comprising a that display unit. 2. The inter-vehicle signal transmission system according to claim 1, wherein the signal management device is arranged near the intersection and can cover at least the intersection. 3. The signal management device according to claim 1, wherein the signal management device is arranged at a position where there is no intersection and can cover at least the entire width of the road directly facing the position. Inter-vehicle signal transmission system. 4. The second transmitting unit transmits to the signal management device a signal further including an ID code unique to a vehicle group including a plurality of vehicles that are to perform vehicle signal transmission,
The storage unit stores the data included in the signal transmitted from the second transmission unit for each ID code, and the read control unit stores the data stored in the storage unit with the ID code. And the first transmitting section transmits the data and the ID code read by the reading control section to an unspecified vehicle, and the second receiving section From the data transmitted from the first transmission unit, data corresponding to an ID code that matches the ID code unique to the vehicle group to which the vehicle belongs is extracted and supplied to the display unit. The inter-vehicle signal transmission system according to claim 1. 5. The inter-vehicle signal transmission system according to claim 1, wherein the storage unit sets a storage time for each signal of each vehicle group for which inter-vehicle signal transmission is to be performed. 6. The inter-vehicle signal transmission according to claim 1, wherein the second transmission unit is for transmitting a signal including data in which the running state of the vehicle is encoded to the signal management device. system.