JPS6355700A - Road sign informer - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a passageway sign notification device in which the contents of a passageway sign are notified by a vehicle-mounted device by wirelessly transmitting the sign contents from a roadside transmitting station to the vehicle-mounted device.

(Prior art and its problems) Japanese Patent Application Laid-Open No. 61-7997 discloses that the content of the road sign is wirelessly transmitted from a sign signal generator (roadside transmitting station) installed in the road sign to an on-vehicle device. shows a system that notifies the contents of the passage sign.

In this system, the content of the road sign on which the sign signal generating device is installed is wirelessly transmitted from the sign signal transmitting device, and the vehicle receives the wireless signal when it approaches the road sign within a certain distance. Then, the in-vehicle device starts notifying the contents of the sign.

Further, when the vehicle has traveled a predetermined distance, the sign content notification by the on-vehicle device automatically ends.

However, in the above-mentioned conventional system, after the notification of the sign content by the Danshaki device has started, the passage sign has already become unnecessary due to the passage sign proceeding to another alley different from the valid passage. Even in this case, there is an inconvenience that the on-vehicle device continues to provide notification until the vehicle has traveled a predetermined distance.

In addition, in-vehicle equipment! ¥! j. The start of the information information λ entrance is conditioned on the vehicle entering a certain distance range (reception area) with respect to the roadside transmitting station.

Therefore, depending on the driving condition of the vehicle, there is a possibility that the radio waves transmitted from the roadside transmitting station provided on the roadside sign on the opposite lane side may be received, and therefore incorrect content of the roadside sign may be notified.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a passageway sign notification device of this type that can quickly terminate notification of the contents of unnecessary passageway signs. be.

(Configuration of the Invention) In order to achieve the above object, the present invention is configured as shown in FIG.

In the figure, a radio signal receiving means A receives a radio signal transmitted from a roadside transmitting station a provided corresponding to a road sign.

Then, the sign content of the passage sign corresponding to the roadside transmitting station a is extracted from the received radio wave signal by the sign content extraction means B, and the extracted vL identification content is notified by the notification means C.

Further, a predetermined azimuth area based on the roadside transmitting station a is extracted from the received radio wave signal by the azimuth area extracting means, and the traveling direction of the vehicle is detected by the vehicle traveling direction detecting means E.

The vehicle running direction deviation detection means F detects that the vehicle running direction has deviated from within the predetermined direction region extracted by monitoring the roughly detected vehicle running direction, and When it is detected that the vehicle running direction has deviated, the notification termination means G terminates the notification of the extracted 1-sacred content.

(Description of Embodiments) Hereinafter, preferred embodiments of the passage sign notification device according to the present invention will be described.

In the road sign notification device 1 (shown in FIG. 2), the loop antenna 9
and the transmitting station 30 . via the transmitting/receiving device 11 on the path 0111 shown in FIG. 3 or FIG. 4 . In addition to the radio wave signal wirelessly transmitted from the roadside transmitting/receiving device 40, detection signals from the travel distance detecting device 13 and the direction detecting device 15 are each taken in by the microcomputer 3. Then, the microcomputer 3 displays the necessary information on the screen on the CRT display 17 or outputs audio from one speaker based on the received radio wave signal portion or detection signal.

Further, the operation of the microcomputer 3 can be switched by a selection button 5 or a selection button 7, and when the selection button 5 is pressed, the passage sign notification device 1 is activated by a vending machine placed on the roadside (roadside machine 50). .) performs a communication control operation with the roadside transmitting/receiving device 40 provided in the roadside transmitter/receiver 40 (see Fig. 12) (roadside equipment?41 processing). - When the power selection button 7 is pressed, the road sign notification device 1
The roadside transmitting station 30 receives a radio wave signal wirelessly transmitted from the roadside transmitting station 30, and instructs the driver on the roadside display 17 or the speaker 19 about the sign content of the passageway sign where the roadside transmitting station 30 is installed.

In this embodiment, when the selection button 5 is pressed, a roadside transmitting/receiving device installed in a cigarette vending machine is activated.

Selection buttons 21a and 21b provided in the selection button group 21 allow communication with roadside transceivers provided in soft drink vending machines and roadside transceivers provided in public telephones.
, 21c.

A block diagram of the roadside transmitting station 30 is shown in FIG. sent to.

Figure 4 also shows U! 50+: A block diagram of the roadside transmitting/receiving device 40 provided is shown, in which a microcomputer 41 transmits data (13th (see figure).

FIG. 5 shows a flowchart of the processing procedure carried out by the microcomputer 3 of the passage sign notification device 1.

In the same figure, in the first step 100, the selection button 5 (
It is determined whether or not the button A) is turned on. If the selection button 5 is turned on, the process proceeds to step 104, where on-road machine information processing is performed. Note that this road device information processing will be described in detail later.

If the selection button 5 is not pressed in step 100, the process advances to the next step 102, where it is determined whether the selection button 7 (button B) has been turned on.

Next, when the selection button 7 is turned on in step 102, the counter for the number of passage signs N is reset to 1 in the next step 106.
Then, the process advances to step 108 and waits to receive a transmission radio wave from the roadside transmitting station 30.

When the transmitted radio wave from the roadside transmitting station 30 is received in step 108, the counter for the number of road signs N is incremented in the next step 110, and the transmitted radio wave signal is demodulated by the transmitting/receiving device 11 in step 112, and the microcomputer 3 be taken into.

Note that if no reception is made in step 108, the reception has already been completed and the content of the passage sign is currently being announced on the CRT display 17 or the like (step 120, negative), or the information has not been received at all ( Step 12
0 affirmative), proceed to step 118 or continue waiting in step 108, respectively.

Further, in the next step 113, data invalidation processing is performed, and this data invalidation processing is performed according to the flowchart shown in FIG.

In FIG. 6, in the first step 200, the vehicle traveling direction θ- detected by the direction detecting device 15 is captured, and in the next step 210, the direction of the direction data θ wirelessly transmitted from the roadside transmitting station 30 and the direction of the vehicle are captured. The direction is compared with the given direction θ-.

When the azimuth θ and the azimuth θ- are in opposite directions, the radio signal currently received from the circuit-side transmitting station 30 is considered to have been transmitted from the road-side transmitting station on the opposite lane, and is therefore invalidated.
Returning to step 1.08 in FIG. 5, the process waits for wireless transmission from the roadside transmitting station 30.

Further, when the direction θ and the direction θ' are in the same direction in step 210, the data received this time is determined to be valid, and the data invalidation process 113 is ended, and step 114 in FIG.
Proceed to.

Here, the radio signal transmitted from the roadside transmitting station 30 is the 7th-
As can be understood from the following, a start signal is used to synchronize the passage sign notification device 1 with a received signal.

Data ao indicating the content of the roadside sign; section information a+(i!,) indicating the effective section distance of the roadside sign in which the roadside transmitting station 30 is installed; the vehicle is within a predetermined azimuth area with respect to the roadside transmitting station 30; It consists of average azimuth data a2 (θ>) in the effective section distance used in the small control for the end of notification of passage sign content when deviating from the path sign and an end signal indicating that all data has been transmitted.

For example, as can be understood from Fig. 8, a passage sign N (the content of which is "no parking") is installed on the side of the road, and the content of the passage sign (no parking) is valid over a distance l. In addition, if the average direction of the distance l is "north", the content "no parking", "north" is associated with a predetermined code signal and transmitted to the roadside transmitting station 30.
wirelessly transmitted from.

When proceeding to step 114 as described above, step 1
At step 14, the radio signal transmitted from the roadside transmitting station 30 is stored in the memory of the microcomputer 3, and at the next step 116, the current mileage input from the mileage detection device 13! N is set as the starting point of the valid section of the passage sign N.

In the next step 118, the graphics and characters of the passage sign N are displayed on the CRT display 17 to notify the driver (see FIG. 11).

Note that the notification of the contents of the passage sign N may be made audibly through the speaker 19. In addition, the figures and characters displayed on the CRT display 17 are displayed on the CRT display 17 in the order in which the radio signals transmitted from each roadside transmitting station 30 are received by the road sign notification device 1.
The images are displayed from the top to the bottom of the screen of the RT display 17.

Roughly the next step 122 is the mileage detected by the mileage detection device 13! ' and the vehicle entrainment direction θ' from the direction detection device 15 are taken in by the microcomputer 3.

And on microcomputer 3, starting point I! , N and the captured travel distance β' is determined.

Next is the starting point! The traveling distance Δl based on N is compared with the above-mentioned section distance l, which is input into the microcomputer 3 as a radio wave signal. And Δl! If the vehicle's heading θ' is smaller than θ, the heading θ' of the vehicle is roughly compared with the azimuth data θ, and the heading θ' is calculated using the formula (-45°+θ<θ-
θ + 45°), it is determined that the vehicle continues to travel on the same road, and the notification of the contents of the road sign continues, and the process returns to step 108 to wait for reception (steps 124 to 136). →Step 1
0B).

Also, in step 136, the count of the received radio signal is 1.
Step 126 to Step 1 until DC becomes ifi
30 is repeated, and when the number C of received radio signals reaches the value N in step 136, the notification of all currently received sign contents is completed, and the process returns to step 108 to transmit the next radio signal. wait.

Meanwhile, in step 128, eight! If the road sign becomes larger than , the vehicle is deemed to have deviated from the valid section of the road sign.

Furthermore, if the traveling direction θ' deviates from the range of the above formula in step 130, it is also assumed that the vehicle has left the valid section of the passage marker.

If either one of the deviations is detected, the process proceeds to step 132, where the notification of the sign content of the corresponding passage sign is terminated, and in the next step 134, the count of the number of displayed signs is set to 1.
is decremented.

Note that if a plurality of radio wave signals have been captured, the capture order number of each radio wave signal is incremented by 1 in step 138, and the process returns to step 108 to perform the same processing as described above.

In the flow chart shown in FIG. 5, a plurality of radio signals are captured, and step 1 is performed for each radio signal.
28ip3 and the processing of step 130 is being performed. Therefore, in step 124, first the number C of radio signals is O.
In the next step 120, the number of radio signals C
is incremented by 1.

When it is confirmed in step 136 that the radio signal ic has reached the number N of captured radio signals, the process returns to step 108 and the same processing as described above is performed.

As described above, in the Kobuya 1, when the selection button 7 is turned on, a control is performed to receive a radio signal from the roadside transmitting station 30 and to notify the distinguishing contents of the passage sign where the roadside transmitting station 30 is installed. It is done.

Next, road device information processing (step 104) will be explained.

When the selection button 5 is turned on, the microcomputer 3
enters the activated state to perform roadside machine information processing.

As schematically shown in FIG. 12, this roadside device information processing involves communication between the on-vehicle device (pathway sign notification device) 1 and the roadside transceiver 40 provided in the roadside device 50. The installation location of the road device 50 is displayed on the CRT display 17 to inform the driver.

In addition, the U-branch 50 in this embodiment does not sell cigarettes automatically.

It is said to be an automatic roadside machine for soft drinks and a public telephone.

Further, FIG. 13 shows a communication sequence for communication between the on-vehicle device 1 and the roadside transceiver 40, and as can be understood from the figure, request data is transmitted from the on-vehicle device 1 to the roadside transceiver 40. When transmitted, the roadside transceiver 40 transmits response data to the in-vehicle device 1 in response. After receiving the response data, the in-vehicle device 1 transmits confirmation data to the roadside transceiver 40.゛Also, FIG. 12 shows the contents of each of the above-mentioned data communicated between the on-vehicle device 1 and the roadside transceiver 40, and as can be understood from the figure, the requested data can be changed arbitrarily for each vehicle. The response data includes the vehicle number (same as the request data) and one item code (the vehicle number (same as the request data) and the second item code (the content of the cigarettes, etc. requested by the vehicle occupant) assigned to the vehicle occupant. service content of the roadside device 50, such as the type of cigarettes sold by the roadside device), and an arbitrary device number assigned to the roadside device. The confirmation data has the same device number as the response data, and the beginning and end of each data indicate pre-data for synchronizing the on-vehicle device 1 and the roadside transceiver 40, and the end of data transmission. Post data is attached to each.

FIG. 15 shows a flowchart of the processing procedure for road equipment information processing performed in step 104 of FIG.

In the figure, step 300. Step 301° In step 302, the selection switches 21a and 21b start communication with the roadside transceiver 40 installed in the cigarette vending machine, the soft drink vending machine, and the public telephone, respectively.
, 21c is turned on.

When any one selection switch is turned on, step 303. In steps 304 and 305, an item]-code is set corresponding to each selection switch.

Then, in the next step 306, request data is created based on the vehicle number of the vehicle and the set item code, and in the next step 108, the request data is wirelessly transmitted to the 50 roadside transceivers 40 on the road.

In the next step 30B, the process waits for a predetermined time to elapse until the transmission of the request data is completed, and when the predetermined time has elapsed, in the next step 309, the process waits for the response data transmitted from the roadside transceiver 40 to be received.

If the response data is not transmitted within a predetermined time in step 310, the process returns to step 307 and performs the same process.

If response data is received, step 311 waits for a predetermined period of time until all response data is received, and step 312 determines whether the vehicle number in the request data matches the vehicle number in the response data. be done.

Then, if it is confirmed that both vehicle numbers match, step 31
In step 3, it is further confirmed whether the item code of the request data and the item code of the response data match or do not match.

If it is confirmed in step 313 that the two item codes match, confirmation data is transmitted in step 314.

This confirmation data is transmitted until a predetermined time has elapsed in step 315, and when the confirmation data transmission is completed, in step 116, the on-vehicle device is transmitted to 50 roadside transceivers 4.
The user of the device is notified by voice from speaker 1 that the communication with device 0 has ended, and the process returns to step 300 to repeat the same process.

If it is not confirmed in step 312 or 313 that the vehicle numbers match or the item codes match, the process returns to step 304 and transmits the request data again.

Note that when there are n curves within the effective section for a certain passage sign M, the radio signal transmitted from the roadside transmitting station 30 is based on the straight-line distance between adjacent curves, gn, and its direction, as shown in FIG. 9, for example. By setting this to On and approximating the effective section for the passage sign M with a plurality of straight lines, accurate notification of the passage sign can be performed.

For example, as can be seen from Fig. 10, if there are two curves M2 and M3 on the road (within the valid section for the holy M (start point is Mo, end point is M4), the distance between M+M2 is 11
．． Between M2M3, e2. Between M31VL! ! , 3, and the orientation θ4. θ2. θ3 can be associated and given as road information for the passage sign M.

As described above, in the in-vehicle device 1, when the selection button 5 is turned on, the selection switches 21a and 21b are turned on.

21c, request data is transmitted to the roadside transceiver 40 in response to each ON operation, and when response data is transmitted from the roadside transceiver 40, confirmation data is transmitted to the roadside transceiver 40, and the roadside device 50 Control is being performed to inform the user of the vehicle R device 1 that the vehicle is nearby.

On the other hand, in FIG.
0 is shown in a flowchart.

In the same figure, the first step 400 waits for the transmission of request data from the on-vehicle device 1, and when the request data is received, the next step 401 waits for a predetermined time to elapse until all the request data are received. wait.

When the request data is received, the item code in the request data and the item code of the road machine 50 (the road machine 50
For example, it is determined whether the item code matches the code for distinguishing that it is an automatic roadside cigarette machine, and if the two item codes match, the process advances to step 403 and response data is created. Further, if the two item codes do not match in step 402, the process moves to step 404 and similar processing is performed.

The response data is roughly composed of the item code of the road device, a number (equipment number) that distinguishes the road device 50 from other road devices, the pre-data, the post data, and the like.

In the next step 404, it is determined whether the response data has been transmitted twice. If the response data has not been transmitted twice, the response data is transmitted to the vehicle vi and the device 1 in step 405.

The purpose of determining whether the response data has been transmitted twice in step 404 is to ensure communication. That is, when response data is transmitted from the roadside transceiver 40, in principle, WI recognition data is transmitted from the in-vehicle device 1. However, it is possible that the confirmation data is not sent for some reason, so in that case, the response data is sent again, and if the confirmation data is still not sent, the process returns to step 400 and starts over from receiving the request data.

After the response data is transmitted in step 405 as described above, in step 406 the process waits for the elapse of a predetermined time period during which all the response data is transmitted.

Then, in step 407, it is determined whether or not the certainty 2 data has been transmitted from the in-vehicle device 1, and in step 410, it is determined that the certainty am data has been received even though a predetermined time has elapsed.
If tA is not present, the process returns to step 404 and the same process as above is performed.

If the certainty L2 data is received in step 407, the process waits for the elapse of the predetermined opening time in which all the certainty 2 data is received in step 411, and when it is confirmed that the predetermined time has elapsed, the process returns to step 400 and the above steps are performed. Perform the same process.

In this way, the roadside transmitter/receiver 40 transmits response data in response to the request data transmitted from the in-vehicle device 1, and at the same time, the in-vehicle device 1 transmits the confirmation data S--on the road! 15
The operation is controlled so that the in-vehicle device 1 confirms that 0 is near the vehicle.

In this embodiment, the loudspeaker 19 gives an audio message that the road 150 is near the vehicle (=J), but the same information may be displayed on the noise 17 on a CRT display.This is an example of such a case. It is shown in FIG.

Furthermore, instead of the roadside transmitter/receiver 40, a roadside transmitter (not shown) is used that constantly transmits information regarding the roadside device 50 wirelessly, thereby eliminating the need for a computer and simplifying the wireless device installed in the roadside device 50. You may also try to

FIG. 18 shows the transmission content wirelessly transmitted from such a transmission-only wireless device (hereinafter referred to as a wireless device), and as can be understood from the figure, predata,
The item code, detailed data such as the sales item handled by 50 on the road, other attribute data such as the number and installation location of the on-road machine, and post data are transmitted using this 1tln number.

Further, FIG. 19 shows a flowchart of the processing procedure performed by the in-vehicle device 1 when the above-mentioned transmission-only wireless device is used.

Note that the same step numbers are given to the same processing steps as those shown in FIG. 15, and the explanation thereof will be omitted.

When the processing from step 300 to step 305 in FIG. At 360, it is determined whether the item code set on the in-vehicle device 1 side matches or does not match the item code of the transmitted data.

If both item codes match, step 370
At step 380, the speaker 19 audibly instructs that the vJ, 50 on the road is near the vehicle, and at the next step 380, the content of the received data is displayed on the CRT display 17.

FIG. 20 shows an example of the display content displayed in step 380. In this example, when the roadside machine 5O is a soft drink vending machine, the soft drinks sold at the roadside machine 5O are The types and prices are displayed on the screen.

As explained above, the passageway sign notification device 1 in this embodiment detects not only when the vehicle has traveled a predetermined distance in the valid section l of the passageway sign, but also the direction θ and the actual direction in which the vehicle should travel with respect to the passageway sign. Even when the traveling direction θ' of the vehicle deviates greatly, the notification of the contents of the passage sign is terminated.

Therefore, if you enter an alley etc. on the way after passing the passage sign N and the information on the passage sign is no longer needed,
Since the notification of the contents of the passage sign is quickly terminated, it is possible to prevent discrepancies between the passage sign installed on the road on which the vehicle is actually traveling and the road (ordinary content) being notified.

Furthermore, if the direction θ of the transmitted radio waves transmitted from the roadside transmission/1Ii 330 toward the vehicle is opposite to the vehicle's traveling direction θ-, the transmitted radio waves are transmitted from the roadside transmitting station installed in the opposite lane. Therefore, the radio signal is invalidated and is not taken in as road information currently necessary for vehicles, so it is possible to prevent incorrect road sign contents from being reported by System@1. can.

Further, the path sign notification device 1 in this embodiment can notify the installation location of the roadside device 50, etc. by communicating with the roadside transceiver 40 provided on the roadside device 50 such as a vending machine. Therefore, it is not necessary to look aside or drive slowly in order to search for the road device 50, and the driver can drive safely and quickly reach the desired installation location of the road device 50.

(Effects of the Invention) As is clear from the above description, the road sign notification device according to the present invention notifies the roadside transmitting station of the roadside transmitting station in the direction in which the vehicle is traveling. It is terminated when the direction deviates from a predetermined azimuth area based on .

Therefore, if you enter an alley or the like after passing a passage sign where the roadside transmitting station is installed, and the sign contents of that passage sign are no longer needed, the notification of the sign contents for that passage's IM information will be promptly terminated. Ru.

Therefore, unnecessary or erroneous information about the contents of the passage sign will not be notified.

[Brief explanation of the drawing]

Fig. 1 is a complaint response diagram, Fig. 2 is a block diagram of the road sign notification device, Fig. 3 is a block diagram of the roadside transmitting station, Fig. 4 is a block diagram of the roadside transceiver, and Figs. 5 and 6 are FIG. 7 is an explanatory diagram showing the radio wave signal transmitted from the roadside transmitting station; FIG. 8 is an explanatory diagram when the effective section of the road sign is substantially straight; FIG. The figure is an explanatory diagram of the radio signal transmitted from the roadside transmitting station when there are multiple curves within the valid section of the road sign, and Figure 10 is an explanatory diagram of the radio signal transmitted from the roadside transmitting station when there are two curves within the valid section of the road sign. An explanatory diagram showing a comparison between the radio signal transmitted from the device and the actual passage, Figure 11 is a display example of the content of the passage sign displayed on the device, and Figure 12 is a schematic diagram showing the relationship between vehicles and roadside equipment. 13 is an explanatory diagram showing the communication sequence between the device and the roadside transceiver, and FIG.
FIG. 15 is an explanatory diagram showing the data contents of each data exchanged between the device and the roadside transceiver, FIG. 15 is a flowchart showing road device information processing performed by the device, and FIG.
Figure 17 is a flowchart showing the processing procedure performed by the roadside transceiver, Figure 17 is an explanatory diagram showing the state in which the location of the roadside unit is taught by screen display, and Figure 18 is the roadside transceiver configured as a transmission-only radio. An explanatory diagram showing the transmission content transmitted from the wireless device when the wireless device is replaced, FIG. 19 is a flowchart showing the processing procedure performed by the wireless device when the wireless device is used, and FIG. 20 is the transmission of FIG. 18. It is an explanatory view showing an example of display contents displayed on the device based on data. 1... Passage sign notification device (vehicle-mounted device) 3... Microcomputer 5... Selection button A 7... Selection button B 9... Loop antenna 11... Receiving device 13... Driving Distance detection device 15... Direction detection device 17... CRT display 19... Speaker 21... Selection switch group 30... Roadside transmitting station 40... Roadside transceiver 50... Roadside device patent application Person Nissan Motor Co., Ltd. -1-Part I
Figure 7 Figure 8 Figure 1 I Figure 13 Figure 14 Mouth
-bu・1f-da 6 electric: θ table [two nini [wo←=
Royo 1-13- Group-1111 Figure 16 Figure 17 Figure 18

Claims (1)

[Claims] (1) Radio signal receiving means for receiving a radio signal transmitted from a roadside transmitting station installed corresponding to a road sign, and extracting the sign content of a road sign corresponding to the roadside transmitting station from the received radio signal. a sign content extraction means for notifying the extracted sign content; a azimuth region extraction means for extracting a predetermined azimuth region based on the roadside transmitting station from the received radio signal; A vehicle running azimuth detection means for detecting a vehicle running azimuth, and a vehicle running azimuth deviation detection means for detecting that the vehicle running azimuth has deviated from a predetermined azimuth area extracted by monitoring the detected vehicle running azimuth. 1. A road sign notification device comprising: notification termination means for terminating notification of extracted sign content when it is detected that a vehicle traveling direction deviates from within.