JP2010092114A - Traveling vehicle support system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling vehicle support system which can be easily and inexpensively installed even in an area from a peripheral part of a plain field to a mountain slope in which a narrow zone where it is difficult to keep a recognizable distance successively continues. <P>SOLUTION: The traveling vehicle support system includes: a first sensor for detecting a traveling vehicle approaching from one direction side; a second sensor for detecting a traveling vehicle approaching from the other direction side; a plurality of first display units for notifying a driver of the approach of the traveling vehicle from one direction side; and a plurality of second display units for notifying the driver of the approach of the traveling vehicle from the other direction side. Those display units are installed between the first sensor and the second sensor, and each detection signal thereof is communicated by radio communication by using a specific small power radio communication of 400 MHz band. A plurality of first display units thereof successively transfer the received first detection signals from the leading first display unit at one side to the first display unit at the other side, and a plurality of second display units thereof successively transfer the received second detection signals from the leading second display unit at the other side to the second display unit at one side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a traveling vehicle support system for informing a driver in advance of the presence of an oncoming vehicle on a road in a mountainous area where curves are continuous and it is difficult to ensure a viewing distance.

  The hilly and mountainous areas are “areas with little cultivated land from the periphery of the plain to the mountainous areas (agricultural white paper)”. In the hilly and mountainous areas, there are many undeveloped roads where it is difficult to secure a viewing distance due to narrow width and continuous curves. However, the hilly and mountainous areas are depopulated and aging, and the priority of road maintenance is low, and there are many road traffic problems.

Therefore, in recent years, so-called 1.5-lane road maintenance is frequently performed as road maintenance in mountainous areas. 1.5-lane road maintenance is an effective combination of continuous improvement in two lanes or one lane, and local improvements such as correction of curves to secure viewing distances and installation of shelters that allow passing of gaps. This is a method of performing minimal improvement work.
1.5 Lane road maintenance is useful in terms of cost, etc., but there are many cases where it is difficult to perform hardware maintenance such as correction of curves and installation of shelters due to topographical conditions, etc., and mutual traffic is difficult depending on the location There are many narrow sections.
Therefore, measures such as designating a narrow section as a horn section or installing a curve mirror are taken. However, even if it is designated as a horn section, there are actually many drivers who do not sound a horn, and even if a curved mirror is installed, the driver can check whether there is an oncoming vehicle with sufficient margin on a complicated linear curve In either case, there was a problem in terms of safety.

In view of such a current situation, a system using an existing oncoming vehicle approach display device (for example, see Patent Document 1 below) that detects a traveling vehicle and notifies the oncoming vehicle of the detected traveling vehicle has been developed. Yes.
Specifically, in a narrow section where it is difficult to pass, a traveling vehicle approaching from one direction by a sensor is detected by a sensor, and a traveling vehicle approaching from one direction to a driver of the traveling vehicle approaching from the other direction (oncoming vehicle) ) In advance. With this system, the driver can recognize the presence of an oncoming vehicle in advance, and can avoid in advance congestion of the vehicle in a narrow section where passing is difficult.

  However, the system is composed of one sensor for detecting a traveling vehicle and one indicator for notifying the existence of an oncoming vehicle, and each set covers a section of several tens to several hundreds of meters. Met. Therefore, when there are continuous sections (curves, etc.) that are narrow and difficult to secure the viewing distance (for example, hilly and mountainous areas), the system must be installed for each section (for example, each curve). Therefore, there is a problem that installation work is troublesome and a large installation cost is required.

Japanese Patent Laid-Open No. 11-039591

  The present invention has been made in view of the above problems, and provides a traveling vehicle support system that can be easily and inexpensively installed even in a mountainous region where a narrow and difficult-to-view distance section continues continuously. To solve it.

  The invention according to claim 1 detects a traveling vehicle approaching from one direction side, detects a traveling vehicle approaching from the other direction side, and a first sensor for transferring a first detection signal for notifying that the traveling vehicle is detected. A second sensor for transferring a second detection signal for notifying that the detection has been performed; and a second sensor that is installed between the first sensor and the second sensor and that travels from one direction when the first detection signal is received. A plurality of first indicators for displaying first notification information for notifying the approach of the vehicle, and installed between the first sensor and the second sensor, and when receiving the second detection signal, the other direction side Comprising a plurality of second displays for displaying second notification information for notifying the approach of the traveling vehicle from the first sensor and the second sensor are sensors for detecting the traveling vehicle using ZigBee, The first detection signal and the second detection signal Is communicated by wireless communication using a specific low-power radio in the 400 MHz band, and the plurality of first display devices receive the first detection signal from the first display device on the one side to the other side. The plurality of second displays sequentially transfer the received second detection signals from the second display on the other side to the second display on one side. The present invention relates to a traveling vehicle support system characterized by

  The invention according to claim 2 relates to the traveling vehicle support system according to claim 1, wherein the first display and the second display are integrated into one display.

  The invention according to claim 3 relates to the traveling vehicle support system according to claim 1 or 2, wherein a solar cell is used as a power source.

According to the first aspect of the present invention, the traveling vehicle approaching from one direction side is detected, the first sensor for transferring the first detection signal for notifying that the traveling vehicle is approached, and the traveling vehicle approaching from the other direction side. A second sensor for detecting and transferring a second detection signal for informing the detection, and installed between the first sensor and the second sensor, from one side when receiving the first detection signal A plurality of first indicators for displaying first notification information for notifying the approach of the traveling vehicle, and when the second detection signal is received. A sensor that includes a plurality of second indicators for displaying second notification information for notifying the approach of the traveling vehicle from the direction side, and wherein the first sensor and the second sensor detect the traveling vehicle using ZigBee. Yes, the first detection signal and the first detection signal The detection signal is communicated by wireless communication using a specific low-power radio in the 400 MHz band, and the plurality of first display units receive the first detection signal received from the first display unit on the one side to the other side. The plurality of second displays sequentially receive the second detection signals received from the second display on the other side to the second display on one side. By transferring, the detection signal detected by one sensor is transferred to a plurality of displays. For this reason, even when there are continuous sections where it is difficult to ensure a viewing distance, it is not necessary to provide a sensor for each section. As a result, even when the application section of the traveling vehicle support system extends over a long distance, the installation labor can be reduced and the installation can be performed at low cost.
Furthermore, since the wireless communication uses a specific low-power radio in the 400 MHz band, interference can be reduced. In addition, since wraparound due to diffraction occurs, communication can be reliably performed even in a mountainous area. In addition, the specific low-power radio has an advantage that a license for use is unnecessary.
In addition, since the first sensor and the second sensor are sensors that detect a traveling vehicle using ZigBee, power saving can be achieved, so that the first sensor and the second sensor can be preferably used even in a mountainous area.

  According to the invention which concerns on Claim 2, installation can be performed more easily because said 1st indicator and said 2nd indicator are united and it has become one indicator.

  According to the third aspect of the present invention, since a solar cell is used as a power source, it is not necessary to supply fuel or the like, and it is optimal even in a mountainous area where transportation is convenient.

Hereinafter, a traveling vehicle support system according to the present invention will be described with reference to the drawings.
In this specification, the one direction side refers to one direction side in the road extending direction, and the other direction side refers to the one direction side opposite to the one direction side in the road extending direction. In other words, the direction of one direction (or the other direction) changes as the road curves.

FIG. 1 is a diagram showing a traveling vehicle support system (100) according to an embodiment of the present invention.
In this specification, a traveling vehicle traveling from one direction side to the other direction side (right side to the left side in FIG. 1) is referred to as a traveling vehicle (A), and one direction side from the other direction side (left side to the right side in FIG. 1). Let the traveling vehicle which travels to be a traveling vehicle (B).
In addition, the third display unit in the specification is a unit in which the first display unit and the second display unit are integrated. In other words, the third display unit of the present specification is included in the first display unit (or the second display unit) in the claims.

As shown in FIG. 1, the traveling vehicle support system (100) is installed on a road (R) having four curves (C1 to C4), and includes a first sensor (1), a second sensor (2), The first display (31, 32), the second display (41, 42), the display integrated with the first display and the second display (the function of the first display and the function of the second display Display (5) (hereinafter referred to as third display (5)).
Of the four curves (C1 to C4), the curve (C1, C4) is a narrow section where the width of the road is narrow, and is a section where it is difficult for the traveling vehicles to pass each other.
The first sensor (1) and the second sensor (2) are collectively referred to as a sensor (S), and the first display (31, 32), the second display (41, 42), the third display ( 5) is collectively referred to as a display (D).

The first sensor (1) is installed on one side of the curve (C1) and detects the traveling vehicle (A) approaching from the one side. Moreover, the 2nd sensor (2) is installed in the other direction side of the curve (C4), and is for detecting the traveling vehicle (B) approaching from the other direction side.
When the first sensor (1) detects the traveling vehicle (A), the first sensor (1) transfers a first detection signal for notifying that the traveling vehicle (A) is detected to the first indicator (31) adjacent to the other direction. To do.
When the second sensor (2) detects the traveling vehicle (B), the second sensor (2) transfers a second detection signal notifying that the traveling vehicle (B) has been detected to the second display (41) adjacent to the one direction side. To do.

The 1st indicator (31, 32), the 2nd indicator (41, 42), and the 3rd indicator (5) are installed between the 1st sensor (1) and the 2nd sensor (2).
Specifically, the first display (31) is installed on the other direction side of the curve (C1), and the first display (32) is installed on the other direction side of the curve (C4). 41) is installed on one side of the curve (C4), and the second indicator (42) is installed on one side of the curve (C1). The third display device (5) is installed between the curve (C2) and the curve (C4).

The first indicator (31, 32) informs the driver of the oncoming vehicle of the traveling vehicle (A) that the traveling vehicle (A) is approaching from one direction when the first detection signal is received. First notification information to be notified is displayed. At this time, the first indicator (31, 32) displays the first notification information toward the other direction so that the driver of the oncoming vehicle approaching from the other direction can confirm.
The second indicator (41, 42) notifies the driver of the traveling vehicle (B) that the traveling vehicle (B) is approaching from the other direction side when the second detection signal is received. Two notification information is displayed. At this time, the second indicator (41, 42) displays the second notification information toward the one direction side so that the driver of the oncoming vehicle approaching from the one direction side can be confirmed.
The third display (5) has both functions of the first display (31, 32) and the second display (41, 42). When the first detection signal is received, The first notification information is displayed toward the other direction, and when the second detection signal is received, the second notification information is displayed toward the one direction.

Further, after the first sensor (1) transfers the first detection signal to the first display (31) adjacent to the other direction, the first display (31) is transferred to the third display (5). The display (5) transfers the first detection signal to the first display (32). That is, the first detection signal is transmitted from the first sensor (1) to the first display (31) (first display on one side), the third display (5), and the first display (32). It will be transferred in order.
And 1st alerting | reporting information is displayed in order with a 1st indicator (31) (the first indicator of one side first), a 3rd indicator (5), and a 1st indicator (32). That is, the first notification information is sequentially displayed in the traveling direction of the traveling vehicle (A) detected by the first sensor (1).

In addition, after the second sensor (2) transfers the second detection signal to the second display (41) adjacent to one direction, the second display (41) is transferred to the third display (5). The display (5) transfers the second detection signal to the second display (42). That is, the second detection signal is sent from the second sensor (2) to the second display (41) (the second display on the other side first), the third display (5), the second display (42), and so on. It will be transferred in order.
And 2nd alerting | reporting information is displayed in order with a 2nd indicator (41) (the 2nd indicator of the other side first), a 3rd indicator (5), and a 2nd indicator (42). That is, 2nd alerting | reporting information will be displayed in order toward the advancing direction of the traveling vehicle (B) detected by the 2nd sensor (2).

  As described above, when the detection signals detected by one sensor (S) are sequentially transferred to a plurality of display units (D), there are continuous sections where it is difficult to secure a viewing distance. However, it is not necessary to provide a sensor for each section. Therefore, even when the application section of the traveling vehicle support system (100) is a long distance, the installation labor can be reduced and the installation can be performed at low cost.

Further, the display (D) displays the first notification information (or the second notification information) before the traveling vehicle (A) (or the traveling vehicle (B)) passes in front of each display. Set.
Thereby, the driver of the oncoming vehicle of the traveling vehicle (A) (or traveling vehicle (B)) may recognize in advance the existence of the traveling vehicle (A) (or traveling vehicle (B)) approaching from the front. it can. Therefore, the driver can take measures such as waiting in a shelter or a relatively wide area before passing the oncoming vehicle. In addition, it is possible to prevent the occurrence of an accident at the encounter in the curves (C1 to C4) (particularly, the curves (C1, C4) which are narrow sections).
About the timing which displays alerting | reporting information, what is necessary is just to set suitably in consideration of the legal speed, the width | variety of a road (R), the distance between indicators (D), etc. In addition, when the size and speed of the traveling vehicle are detected by the sensor, the timing for displaying the notification information may be set in consideration of the size and speed of the traveling vehicle. Alternatively, the time for the traveling vehicle to reach each indicator (D) after being detected by the sensor (S) may be measured in advance and set based on the time.

  Note that the curve (C2, C3) is not a narrow area, and traveling vehicles can pass each other, so that safety can be ensured to some extent. It may not be recognized. In the traveling vehicle support system (100), when the traveling vehicle (A) passes the curve (C3) and when the traveling vehicle (B) passes the curve (C2), the driver of the oncoming vehicle travels in advance. The vehicle (A, B) is not recognized.

The third indicator (5) also serves as a relay point between the first indicator (31) and the first indicator (32) (or the second indicator (41) and the second indicator (42)). To fulfill.
That is, when the distance between the first display (31) and the first display (32) (or the second display (41) and the second display (42)) is longer than the wireless communication possible distance, Even if there is an obstacle between the display (31) and the first display (32) (or the second display (41) and the second display (42)), the third display (5) is relayed. Thus, wireless communication can be performed.

A specific low-power radio in the 400 MHz band (300 to 470 MHz) is used for communication of detection signals between the sensor (S) and the display (D). By using a specific low-power radio in the 400 MHz band (300 to 470 MHz), interference can be reduced, and further, wraparound due to diffraction occurs, so that communication can be reliably performed in a mountainous area or the like. That is, radio waves interfere with each other at a frequency lower than the 400 MHz band, and straightness is strong at frequencies higher than the 400 MHz band, and wraparound due to diffraction cannot be expected. In addition, the specific low-power radio has an advantage that a license for use is unnecessary. Furthermore, since the equipment for specific low-power wireless communication is inexpensive, the entire traveling vehicle support system (100) can be made inexpensive.
In addition, when a specific low power radio with an output of 10 mW and a 400 MHz band is used, communication of about 100 to 200 m can be performed, which is also suitable for the traveling vehicle support system (100).
In addition, since the specific low power radio in the 400 MHz band (300 to 470 MHz) is wireless communication, it is not necessary to install a cable unlike wired communication. The traveling vehicle support system (100) is often installed in a hilly and mountainous area, etc., but in a hilly and mountainous area, the convenience of transportation is poor, and it is difficult to run a cable for wired communication. It is preferable to use wireless communication rather than communication. In addition, wireless communication has no risk of cable breaks.

  In addition, in the wireless communication between the sensor (S) and the display (D), a plurality of information may be communicated using a plurality of communication channels. Thereby, a plurality of pieces of information can be communicated without causing interference. For example, by performing communication from one direction side to the other direction side and communication from the other direction side to the one direction side using different communication channels, it is possible to prevent each communication from interfering. Further, even when communication other than the traveling vehicle support system (100) is performed, interference can be prevented.

Next, specific configurations of the sensor (S) and the display (D) will be described.
FIG. 2 is a diagram illustrating a part of the sensor (S) (detecting units (S1, S2)).
FIG. 3 is a diagram showing the display (D).

A sensor (S) is comprised from the 1st detection part (S1) and the 2nd detection part (S2). The two detectors (S1, S2) are installed in parallel to the road (R) with a certain interval.
Since the sensor (S) is composed of two detection units (S1, S2), it can be detected from which direction the traveling vehicle has come. That is, if the first detection unit (S1) detects the traveling vehicle earlier than the second detection unit (S2), it can be understood that the traveling vehicle has come from the direction of the first detection unit (S1), and the second detection unit ( If S2) detects a traveling vehicle earlier than a 1st detection part (S1), it will know that a traveling vehicle came from the direction of the 2nd detection part (S2).
In addition, since the sensor (S) includes two detection units (S1, S2), the size of the traveling vehicle can also be detected. Specifically, when there are moments when the two detection units (S1, S2) simultaneously detect the traveling vehicle, the total length of the traveling vehicle is greater than or equal to the interval (for example, 5 m) between the two detection units (S1, S2). I understand that.
Moreover, the speed of a traveling vehicle can also be detected by measuring the time after one detection part detects a traveling vehicle until the other detection part detects a traveling vehicle.

As shown in FIG. 2, each of the detection units (S1, S2) includes a first radio unit (61), a second radio unit (62), and a detection signal communication device (63). And the 1st radio | wireless part (61) and the 2nd radio | wireless part (62) are installed on both sides of the road (R).
The first wireless unit (61) includes a first wireless communication element (611), a received signal strength (RSSI) measuring device (612), and a power source (613), which are connected via an interface board (614). Has been. The second wireless unit (62) includes a second wireless communication element (621) and a power source (622), which are connected via an interface board (623). The detection signal communication device (63) is connected to the RSSI measuring device (612) of the first wireless unit (61).

Each detection unit (S1, S2) issues a detection command from the first wireless communication element (611) to the second wireless communication element (621) (so as to cross the road (R)). Then, the received signal strength (RSSI) value added to the response notification that the second wireless element (621) is detected is measured by the RSSI measuring device (612).
When the traveling vehicle (A) (or traveling vehicle (B)) passes between the first wireless communication element (611) and the second wireless communication element (621), the first wireless communication element (611) and the second wireless communication element Since the radio wave between the communication elements (621) is blocked, the RSSI value detected by the RSSI measuring device (612) decreases. That is, by detecting a decrease in the RSSI value, it is detected that the traveling vehicle (A) (or traveling vehicle (B)) has passed between the first wireless communication element (611) and the second wireless communication element (621). To do.
Further, the detection signal communication device (63) performs communication between the detection units (S1, S2), or transfers the detection signal to the first display device (31) (or the second display device (41)). .

ZigBee is used for wireless communication between the first wireless communication element (611) and the second wireless communication element (621). ZigBee is one of the short-range wireless communication standards, and the (electrical) specification of the basic part is standardized as IEEE 802.15.4. ZigBee is characterized by low power consumption. The traveling vehicle support system (100) is often installed in a mountainous area or the like. Although it is difficult to supply a large amount of power in an intermediate and mountainous area, etc., power saving can be achieved by using ZigBee, so the traveling vehicle support system (100) is preferably used also in an intermediate and mountainous area. can do. Furthermore, since the apparatus using ZigBee is inexpensive, the traveling vehicle support system (100) as a whole can be made inexpensive.
In addition, as a sensor (S), it is not limited at all to this embodiment, If it is a sensor which detects a traveling vehicle using ZigBee, it is contained in this invention.

As shown in FIG. 3, the display (D) includes a detection signal receiver (71), a signal converter (72), a relay (73), a display board (74), and a detection signal transfer unit (75). Moreover, it has a power supply (not shown) as a power source.
The detection signal transferred from the sensor (S) or another display (D) is received by the detection signal receiver (71), converted into an electric signal by the signal converter (72), and the relay (73) is connected. The notification information is displayed on the display unit (74). At this time, the timing at which the notification information is displayed by the relay (73) can be adjusted. The timing for displaying the detection information may be appropriately set in consideration of the legal speed, the width of the road (R), the distance between the indicators (D), and the like. It can also be set in consideration of the size and speed of the traveling vehicle detected by the sensor (S). It is also possible to measure in advance the time required for the traveling vehicle to reach each indicator (D) after being detected by the sensor (S), and set the time as a reference. Note that the speed of the traveling vehicle is not actually measured by the sensor (S), but may be estimated based on the size of the traveling vehicle.
In addition, the notification information is displayed on the display board (74), and the detection signal is transferred to another display (D) by the detection signal transfer device (75).

As the display board (74), a line-of-sight guide lamp can be used.
Moreover, as a display method of the display board (74), characters such as “approaching oncoming vehicle” may be turned on, or a lamp may be turned on simply.
In addition, when the sensor (S) detects a plurality of traveling vehicles (when the display (D) receives a plurality of detection signals), a character such as “plural units” is lit together, It is also possible to notify that a plurality of oncoming vehicles are approaching, for example, by blinking.
Further, when there is a resting place or a relatively wide place nearby, characters / graphics (such as arrows) that guide the traveling vehicle may be displayed there.
Furthermore, when the size of the traveling vehicle is detected by the sensor (S), the size of the traveling vehicle may be displayed.
When the display (D) is far from the sensor (S), it is longer than the display boards (74) of the other displays (D) in consideration of the time error until the traveling vehicle arrives. Interim notification information may be displayed.

In the case of the third display (5), the detection signal receiver (71) can detect both the first detection signal and the second detection signal, and the display board (74) has the first notification information and the first notification information. Both of the broadcast information can be displayed.
Further, since the first display (32) and the second display (42) do not need to transfer the detection signal, the detection signal transfer unit (75) may not be provided.

Moreover, a solar cell is preferable as a power source (specifically, the power source (613, 622) of the sensor (S) and the power source of the display (D)) of the traveling vehicle support system (100). By using a solar cell, it is not necessary to supply fuel or the like, and it is optimal even in a mountainous area where transportation is convenient.
In addition, since the specific low power radio and ZigBee do not consume much power, the specific low power radio is used for communication between the sensor (S) and the display (D), or the ZigBee is used for the sensor (S). The power saving of the traveling vehicle support system (100) can be achieved. Therefore, the traveling vehicle support system (100) can be appropriately operated even when power from the solar battery is not supplied so much due to rain or cloudy weather.

Next, the operation of the traveling vehicle support system (100) will be described as an example where the traveling vehicle (A) travels from one direction side to the other direction side.
FIG. 4 is a diagram illustrating the operation of the traveling vehicle support system (100) when the traveling vehicle (A) travels from one direction side to the other direction side (from the right side to the left side in FIG. 1).

When the traveling vehicle (A) approaches the first sensor (1), the first sensor (1) detects the traveling vehicle (A) (operation 1). Then, the first detection signal is transferred to the first display (31) (operation 2).
The first indicator (31) displays the first notification information after receiving the first detection signal from the first sensor (1) (operation 3A). Since the first indicator (31) is on the other direction side of the curve (C1), the oncoming vehicle traveling on the other direction side of the curve (C1) is one direction of the curve (C1) of the traveling vehicle (A). The first notification information displayed on the first indicator (31) can be confirmed at the time when the vehicle is traveling (before the traveling vehicle (A) is visually recognized). Thereby, the driver of the oncoming vehicle can recognize in advance the existence of the traveling vehicle (A) hidden in the blind spot by the curve (C1). As a result, the driver of the oncoming vehicle can prevent an encounter accident in a narrow section.
The first display (31) displays the first notification information and transfers the first detection signal to the third display (5) (operation 3B).

  The third display (5) that has received the first detection signal displays the first notification information and transfers the first detection signal to the first display (32) (operation 4). The third indicator (5) serves to let the driver of the oncoming vehicle recognize the presence of the traveling vehicle (A) in advance, and also serves as a relay point between the first indicator (31) and the second indicator (32). Also fulfills.

  The first indicator (32) that has received the first detection signal displays the first notification information (operation 5). Thereby, the oncoming vehicle can recognize the presence of the traveling vehicle (A) in advance.

When the traveling vehicle (B) travels from the other direction to the one direction, the second sensor (2) detects the traveling vehicle (B) and sends a second detection signal to the second display (41). Forward.
After the second indicator (41) receives the second detection signal, the second indicator (41) displays the second notification information and transfers the second detection signal to the third indicator (5).
After the third display (5) receives the second detection signal, the third display (5) displays the second notification information and transfers the second detection signal to the second display (42).
After the second indicator (42) receives the second detection signal, the second indicator (42) displays the second notification information.
When the traveling vehicle (B) travels from the other direction to the one direction, the traveling vehicle support system (100) operates as described above to indicate that the traveling vehicle (B) is approaching. The driver of the oncoming vehicle (B) can be recognized in advance.

  In addition, this invention is not limited to the said embodiment at all. For example, the number of sensors and indicators may be different from that in the above embodiment. Moreover, in the said embodiment, although the indicator (D) is installed one by one side and the other direction side (or any one) with respect to one curve, when a curve is continuous Etc., one (or any one) indicator may be installed on one side and the other side of a plurality of continuous curves.

Hereinafter, the effect of the present invention will be made clearer by showing examples of the present invention.
In this example, the detection unit (S1) (or S2) shown in FIG. 2 was used.
Specifically, as the first wireless communication element (611) and the second wireless communication element (621), ZB24FM-E2022 manufactured by NEC Corporation (NEC Corporation) capable of performing 2.4 GHz band wireless communication (ZigBee communication). Was used. Further, a DC3V power supply was used as the power supply (613, 622), and a personal computer equipped with an RS-232C port was used as the RSSI measuring instrument (612).
Further, the width of the road (R) is about 3 m, the distance between the first radio communication element (611) and the second radio communication element (621) is about 4 m, the first radio communication element (611) and the second radio communication element ( The height from the ground of 621) was 20 cm.

  When a traveling vehicle passed between the 1st radio | wireless communication element (611) and the 2nd radio | wireless communication element (621), it has confirmed that the RSSI value measured with the RSSI measuring device (612) fell about 20 db. From this result, it can be seen that ZigBee can be used as a sensor.

  Further, when the sensor (S) used in the above embodiment and the display (D) shown in FIG. 3 are connected by a LAN using a specific low-power radio, when the traveling vehicle passes, the display board (74) It was also confirmed that the notification information was displayed.

  The present invention can be suitably installed on a road in a mountainous area where there are many narrow sections where a viewing distance cannot be ensured due to a curve.

It is a figure which shows the traveling vehicle assistance system which concerns on embodiment of this invention. It is a figure which shows a part of sensor. It is a figure which shows a display. It is the figure shown about operation | movement of the traveling vehicle assistance system when a traveling vehicle drive | works from the one direction side to the other direction side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st sensor 2 2nd sensor 31,32 1st display 41,42 2nd display 5 3rd display 100 Traveling vehicle assistance system A, B Traveling vehicle S Sensor D Display

Claims (3)

A first sensor that detects a traveling vehicle approaching from one side and transfers a first detection signal for notifying that the vehicle has been detected;
A second sensor for detecting a traveling vehicle approaching from the other direction side and transferring a second detection signal for notifying that the vehicle has been detected;
A plurality of first displays that are installed between the first sensor and the second sensor and display first notification information for notifying the approach of a traveling vehicle from one direction when the first detection signal is received. And
A plurality of second displays that are installed between the first sensor and the second sensor and display second notification information for notifying the approach of the traveling vehicle from the other direction side when the second detection signal is received. Consisting of a vessel
The first sensor and the second sensor are sensors that detect a traveling vehicle using ZigBee,
The first detection signal and the second detection signal are communicated by wireless communication using a specific low power radio of 400 MHz band,
The plurality of first displays sequentially transmit the first detection signal received from the first display on the one side to the first display on the other side,
The plurality of second indicators sequentially transfer the received second detection signal from the second indicator on the other side first to the second indicator on one side. .   The traveling vehicle support system according to claim 1, wherein the first display and the second display are integrated into one display.   3. The traveling vehicle support system according to claim 1, wherein a solar battery is used as a power source.

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