JPH09312617A - On-vehicle optical beacon transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the on-vehicle optical beacon transmitter-receiver by which unusual driving of a vehicle is recognized so as to prevent malfunction or missing of reception of data. SOLUTION: A reception section 1 receives an optical beacon signal from an on-road optical beacon transmitter-receiver and the on-vehicle optical beacon transmitter-receiver conducts up-link processing that sends vehicle information data from its transmission section 2 to the on-road optical beacon transmitter- receiver. When up-linking is impossible, the processing of confirming a drive state of the vehicle, that is, the recognition of congestion or the like based on drive relation data such as a vehicle speed pulse and a gearing status received by a memory 4 from a vehicle status input section 3 is conducted to control the transmission. After the reception of road traffic information data or the like from the on-road optical beacon transmitter-receiver is finished, the on-vehicle optical beacon transmitter-receiver makes data communication with a navigation system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted optical beacon transceiver, and more particularly to receiving road traffic information output from an optical beacon installed on the side of a road,
The present invention relates to a vehicle-mounted optical beacon transceiver that can configure a system that transmits necessary data to the optical beacon and transmits road traffic information to users through a navigation system.

[0002]

2. Description of the Related Art Conventionally, in order to obtain road traffic information with an optical beacon, there is a reception area that the optical beacon has, and normally reception is possible within that area. Depending on the conditions, reception is possible even before the service area. In addition, the traffic situation on the road varies depending on the place and time, and there are many unpredictable situations. Up to now, the in-vehicle optical beacon transmission / reception control unit can recognize the movement of the vehicle in such a situation. It was not possible, and therefore, communication was not performed in consideration of such conditions. Therefore, the on-vehicle optical beacon transceiver can actually receive data before the service area.Therefore, when traffic is congested, or when the vehicle runs abnormally in the reception area or before the reception area, data reception starts or ends. I did not know the timing, and there was a possibility of malfunction. On the other hand, in the conventional navigation system, the vehicle speed sensor,
A method of accurately grasping the current position of the vehicle by using a means for detecting an amount related to traveling such as a gyro sensor has been established and used.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems in the above-described conventional vehicle-mounted optical beacon transceiver, and detects abnormal traveling based on the detection result of the amount related to the traveling of the vehicle. It is a problem to be solved to provide an in-vehicle optical beacon transceiver that can recognize and prevent malfunction in communication and omission of data.

[0004]

The invention according to claim 1 is an optical system for receiving information such as road traffic information transmitted from a fixed optical beacon provided on a road or the like, and transmitting information from a vehicle. In the in-vehicle optical beacon transceiver having beacon transmitting / receiving means, a memory for storing transmission / reception data, the optical beacon transmitting / receiving means and the memory, and processing / controlling means for processing the transmission / reception data,
The control means inputs a signal related to the traveling of the vehicle such as the vehicle speed and stores the traveling related data in the memory, makes the traveling related data an object of transmission, and can be used to control the transmission. It is what

According to a second aspect of the invention, in the first aspect of the invention, the processing / control means recognizes an abnormal traveling state such as a traffic jam of the vehicle based on the traveling-related data, and a fixed optical beacon is sent based on the recognition result. The transmission operation is controlled to efficiently and surely transmit data.

According to a third aspect of the present invention, in the first or second aspect of the invention, the traveling-related data is vehicle speed data.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the traveling-related data is transmission state data.

According to a fifth aspect of the present invention, a navigation system is connected to the vehicle-mounted optical beacon transceiver according to any one of the first to fourth aspects so that data can be transmitted between them. The signal related to driving is transmitted.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle-mounted optical beacon transceiver of the present invention will be described below. FIG. 1 is a block diagram showing the system configuration of an embodiment of an in-vehicle optical beacon transceiver. In FIG. 1, 1 is an optical beacon data receiving unit that receives light that carries road traffic information data from an optical beacon on the road, and 2 is data and time data relating to vehicles individually mounted on the optical beacon on the road. It is an optical beacon data transmission unit that transmits light for carrying out the above. Reference numeral 3 denotes a vehicle status input unit for inputting detected vehicle traveling-related data such as a transmission status signal indicating a gear state for determining a vehicle speed pulse, a traveling direction, etc., and 4 denotes a control program and a reception program. A memory for storing data, 5 is a navigation interface for performing data communication with the navigation system, 6
Is a process for controlling this device and processing data.
It is a control unit (CPU).

FIG. 2 is a conceptual diagram for explaining the relationship between the on-road optical beacon transceiver and the on-vehicle optical beacon transceiver. In FIG. 2, reference numeral 7 is a roadside optical beacon transceiver. From here, it is possible to receive road traffic information data by the vehicle-mounted optical beacon transceiver within a few meters, which is the reference of the service. However, because of the optical communication, there are areas where data can be received even if the service area is out. Reference numeral 8 is a vehicle-mounted optical beacon transceiver having the configuration shown in FIG. 1, 9 is a navigation system, and 10 is a vehicle equipped with the vehicle-mounted optical beacon transceiver 8 and the navigation system 9.

First, when the vehicle 10 enters the optical beacon service area of the on-road optical beacon transceiver 7, the on-vehicle optical beacon transceiver 8 confirms that there is received data, and then the on-road optical beacon transceiver 7 To, the data about the individual vehicle 10 is transmitted. When receiving the required data, the on-road optical beacon transceiver 7 transmits the data with the additional information attached to each vehicle 10, and the vehicle-mounted optical beacon transceiver 8 receives the data. The transmitter / receiver of the vehicle-mounted optical beacon transmitter / receiver 8 performs the control up to this point until the vehicle passes the optical beacon of the on-road optical beacon transmitter / receiver 7. After that, the in-vehicle optical beacon transceiver 8 performs data communication of the received data to the navigation system 9,
The driver knows the road traffic information. The process up to this point is the normal flow of data reception.

FIG. 3 shows a flow chart of an embodiment of a process for judging the vehicle status according to the present invention. The flow will be described below. When the vehicle status determination process is started, first, the state of the vehicle gear is confirmed (step S31). The vehicle gear is the forward gear (1-5
The control unit 6 determines whether it is the speed (step S32), the reverse gear (back gear) (step S33), or the stop gear (neutral, parking) (step S34).
Confirm with. Here, when the vehicle is in the forward gear or the back gear, whether or not the vehicle is moving is checked for the presence of a vehicle speed pulse (steps S35 and S36), and the vehicle is moved forward (step S37) or backward (step S3) depending on the result.
8) and stop (step S38) are determined. Here, as a matter of course, the stop gear determines stop (step S38).

According to the present invention, the reception processing at the time of abnormal traveling such as during traffic jam is determined by utilizing the above-mentioned determination result of the vehicle status. The vehicle traveling state during traffic jam is at an extremely low speed, and when the vehicle enters the beacon service area of the on-road optical beacon transceiver 7 in this state, this reception processing is necessary. At present, when reception is started from before the service area and normal processing is performed, the transmitter / receiver of the vehicle-mounted optical beacon transceiver 8 confirms that there is received data, and then sends it to the on-road optical beacon transceiver 7. Try to send individual vehicle data. However, the vehicle runs at an extremely low speed, and the in-vehicle optical beacon transceiver 8
Since the sender is outside the area, the optical beacon transceiver 7
However, since the data cannot be reached and the reception process may end due to an error, the in-vehicle optical beacon transceiver 8 does not receive until the next beacon passage. In order to prevent such an operation, the vehicle status input unit 3 (see FIG. 1) is used to determine the vehicle traveling state, and the reception processing is performed according to the result.

FIG. 4 shows a flow chart of an embodiment of the receiving process in abnormal traveling. This flow will be described below. When the engine of the vehicle is started, the power of the control unit 6 is turned on and the reception process is started (step S40). First, it is confirmed whether or not it is near the optical beacon on the road (step S41). This process is usually performed before the service area. When not near the optical beacon, the in-vehicle optical beacon transceiver 8 is always in a standby state for optical beacon data. Next, a process of receiving the optical beacon data from the on-road optical beacon transceiver 7 and transmitting the vehicle information data from the on-vehicle optical beacon transceiver 8 to the on-road beacon 7 (hereinafter referred to as an uplink) is performed ( Step S42). Then, the process of confirming whether the data transmitted in step S42 is received by the road beacon is performed (step S43).

If the vehicle is in a traffic jam or the like before entering the service area shown in FIG. 2, the uplink does not reach the road beacon 7 and the reception is disabled. This time,
If it is attempted to cope with this situation by continuing the uplink, deterioration of the optical element of the transmitter may be accelerated. In order to avoid such a case, in the present device, when the uplink does not reach and cannot be received, processing for checking the traveling state of the vehicle is performed (step S45). That is, in step S45, the status of the vehicle is determined according to the flowchart described in FIG.

Here, if the result of the determination on the vehicle status is that the vehicle is in the forward traveling state, the process returns to step S41 again to perform the processing. If the uplink is successful in step S43, the data is stored in the memory 4 of the present device while receiving the road traffic information data from the on-road optical beacon transceiver 7 (step S46). Next, when the vehicle has passed the road beacon 7 or has finished receiving all the data transmitted from it (step S47), data communication is performed with the navigation system (step S48). The data sent here can be displayed in the navigation system, or can be displayed without using the navigation system when the present device has a display unit. By repeating the flow of the receiving process as described above, it becomes possible to prevent the data from being missed and the malfunction.

[0017]

【The invention's effect】

Effect of claim 1: The vehicle-mounted optical beacon transceiver according to the present invention receives the travel-related data of the vehicle on which the transceiver is mounted and stores it in the memory, and the stored travel-related data is used as individual vehicle data. It becomes possible to improve the efficiency of communication by controlling the operation in the communication with the fixed-side optical beacon on the road based on the transmission data and the travel-related data.

Advantageous effect of claim 2: In addition to the advantageous effect of claim 1, when receiving information such as road traffic information, it is judged from the traveling-related data that the vehicle is traveling abnormally due to traffic congestion or the like. To control the behavior of the uplink,
It is possible to prevent data loss and malfunction.

Effects of Claims 3 and 4: In addition to the effect of Claim 2, by identifying the travel-related data as the vehicle speed data and the transmission state data, it is possible to accurately determine the abnormal travel of the vehicle, and as a result, Can be effectively used.

Advantageous effect of claim 5: In addition to the advantageous effects of claims 1 to 4, by using the data and function of the navigation system, new means for obtaining a vehicle running signal such as a vehicle speed pulse is not required. I'm sorry. Also, by displaying characters and simple figures on the display part of the navigation system, it becomes possible to convey road traffic information, and if the road traffic information service becomes widespread, the car multi Become a media system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration of an embodiment of an in-vehicle optical beacon transceiver.

FIG. 2 is a conceptual diagram for explaining the relationship between an on-road optical beacon transceiver and an on-vehicle optical beacon transceiver.

FIG. 3 shows a flowchart of an embodiment of a process for determining a vehicle status according to the present invention.

FIG. 4 shows a flowchart of an embodiment of a reception process in abnormal traveling.

[Explanation of symbols]

1 ... Optical beacon data receiving unit, 2 ... Optical beacon data transmitting unit, 3 ... Vehicle status input unit, 4 ... Memory, 5 ... Navigation interface, 6 ... Processing / control unit (C
PU), 7 ... Optical beacon transceiver on the road, 8 ... Optical beacon transceiver for vehicle, 9 ... Navigation system, 10 ...
vehicle.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location H04B 7/26 H04B 9/00 G 10/24 (72) Inventor Hiroku, Mayor Abeno, Osaka City Ikemachi 22-22 No. 22 in Sharp Co., Ltd. (72) Inventor Yoichiro Tachiki 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka No. Sharp Co., Ltd.

Claims (5)

[Claims] 1. An optical beacon transmission / reception unit for receiving information such as road traffic information transmitted from a fixed optical beacon provided on a road or the like, and transmitting information from a vehicle, and a memory for storing transmission / reception data. And an in-vehicle optical beacon transceiver having a processing / control means for controlling the optical beacon transmission / reception means and the memory and processing transmission / reception data and the like, wherein the processing / control means relates to traveling of the vehicle such as vehicle speed. The optical beacon transmitter / receiver for a vehicle, characterized in that the signal relating to the vehicle is input and the travel-related data is stored in the memory. 2. The processing / control means recognizes the traveling state of the vehicle based on the traveling-related data, and controls the transmission operation to the fixed optical beacon according to the recognition result. Item 1. The in-vehicle optical beacon transceiver according to Item 1. 3. The vehicle-mounted optical beacon transceiver according to claim 1, wherein the travel-related data is vehicle speed data. 4. The on-vehicle optical beacon transceiver according to claim 1, wherein the traveling-related data is transmission state data. 5. A vehicle-mounted optical beacon transceiver according to any one of claims 1 to 4, wherein a navigation system is connected to enable mutual data transmission, and at least a signal related to traveling of the vehicle. An on-vehicle optical beacon transmitter / receiver, characterized in that