JP2004264964A - Stand-by vehicle guiding system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic guiding system by which a truck in a stand-by state at a stand-by depot is efficiently guided to an unloading depot located at a place kept away from the truck. <P>SOLUTION: The small-space intermediate stand-by depot is provided at a place adjacent to the unloading depot. A sensor detecting the presence or absence of the truck is installed at the intermediate stand-by depot. A signal device is installed at the stand-by depot. The signal device receives a signal from the sensor at the intermediate stand-by depot to display whether the truck is in a stop state or in a departure state. When, a space is available at the unloading depot, the truck in the stand-by state at the intermediate stand-by depot moves to the unloading depot. The sensor informs the signal device of a fact that the intermediate stand-by depot is available. The signal device generates a signal for departure. The driver of the truck in the stand-by state at the stand-by depot observes the signal device and then moves the truck to the intermediate stand-by depot. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a guidance system for guiding a waiting vehicle at an appropriate timing.
[0002]
[Prior art]
The factory is provided with an unloading place for unloading the cargo carried by the truck. Unloading at the unloading site takes time, so if the loaded truck arrives at the factory and the unloading site is full, it is necessary to wait until the unloading site is empty. is there.
[0003]
It is unfavorable for the surrounding environment that trucks wait on public roads outside the factory. Therefore, a waiting area may be provided in or near a factory as a place for waiting for time. In a factory with a large amount of material flow, a large-area waiting area that can accommodate many vehicles is provided. If it is difficult to secure a large area near the unloading area, the place where the waiting area is provided may be far from the unloading area.
[0004]
General roads may be used to move from the waiting area to the unloading area. Depending on the traffic conditions on the general road, the travel time from the waiting area to the unloading area is undefined, which is not preferable for the efficiency of unloading work. Furthermore, when a general road is used, trucks coming later may enter the unloading area first without noticing than trucks waiting at the waiting area first, causing congestion at the unloading area Cause you to
[0005]
The guidance of the truck from the waiting place to the unloading place is performed by a truck guide arranged at each of the waiting place and the unloading place. The task of guiding trucks is more complicated in factories with more traffic.
[0006]
2. Description of the Related Art A dump truck guidance system for guiding a dump truck that loads and conveys various loads to a receiving location according to the type of the load loaded on the dump truck is known (see Patent Document 1).
[0007]
[Patent Document 1] Japanese Patent Application Laid-Open No. 05-097250
[0008]
[Problems to be solved by the invention]
An object of the present invention is to provide a standby vehicle guidance system that guides a standby vehicle at an appropriate timing.
[0009]
It is another object of the present invention to provide a waiting vehicle guidance system that reduces the number of people for guiding a waiting vehicle.
[0010]
Still another object of the present invention is to provide a standby vehicle guidance system that reduces the influence on the surrounding environment.
[0011]
It is still another object of the present invention to provide a standby vehicle guidance system that smoothly guides a truck in a factory where many trucks come and go.
[0012]
[Means for Solving the Problems]
Hereinafter, the means for solving the problem will be described using the numbers used in [Embodiments of the Invention] in parentheses. These numbers are added to clarify the correspondence between the description in the claims and the embodiment of the invention. However, those numbers should not be used to interpret the technical scope of the invention described in [Claims].
[0013]
A standby vehicle guidance system (10, 20, 20a) according to the present invention is installed in a first standby area (3), and detects a presence or absence of an empty parking space (12) by a first sensor (11) and a second sensor (11). A traffic light (13) installed in the waiting area (4) and issuing a signal (15) permitting movement to the first waiting area (3) when the first sensor (11) detects an empty parking space (12). ).
[0014]
According to such a standby vehicle guidance system, guidance from the second standby place (4) to the first standby place (3) is performed at an appropriate timing when an empty space is created in the first standby place (3). According to such a standby vehicle guidance system, the guidance from the second standby place (4) to the first standby place (3) is automated, and is performed unattended or with a small number of people.
[0015]
A waiting vehicle guidance system (10, 20, 20a) according to the present invention includes a second sensor (22) that is installed in a work place (2) and detects the presence or absence of a vacant stop space (21) in the work place (2). Then, the traffic signal (13) further outputs a signal (15) for permitting movement to the first waiting place (3) when the second sensor (22) detects an empty parking space (21).
[0016]
According to such a standby vehicle guidance system, guidance from the second standby place (4) to the first standby place (3) is performed at an appropriate timing when an empty space is created in the work place (2). According to such a standby vehicle guidance system, the guidance from the second standby place (4) to the first standby place (3) is automated, and is performed unattended or with a small number of people.
[0017]
It is preferable that the first waiting area (3) is located at a distance where the presence or absence of the stop space (21) in the work area (2) can be visually recognized. Since the first waiting area (3) is provided near the work area (2), the number of vehicles (5) waiting on a public road near the work area (2) to wait for the work area (2) to be vacant is reduced. However, the influence on the surrounding environment due to noise or exhaust gas or traffic obstruction is reduced.
[0018]
The second waiting place (4) is provided at a position farther from the work place (2) than the first waiting place (3), and can park a larger number of vehicles (5) than the first waiting place (3). It is preferable to have a space. It is preferable that the parking space (12) provided in the first waiting place (3) is about one to three parking spaces. According to such a standby vehicle guidance system, the standby area prepared near the work place (2) can be small. According to such a standby vehicle guidance system, when guiding a plurality of vehicles (5) to the work place (2), a parking space (12) for standby provided near the work place (2) is provided for the vehicle (5). Less than the number required.
[0019]
A standby vehicle guidance system (10, 20, 20a) according to the present invention includes a parking space (12) and a first standby in which a first sensor (11) for detecting the presence or absence of an empty parking space (12) is installed. When the first sensor (11) detects a vacant parking space (12), the signal (13) for issuing a signal (15) for permitting the vehicle to move to the first waiting place (3) is generated. A second waiting area (4) installed.
[0020]
According to such a standby vehicle guidance system, guidance from the second standby place (4) to the first standby place (3) is performed at an appropriate timing when an empty space is created in the first standby place (3). According to such a standby vehicle guidance system, the guidance from the second standby place (4) to the first standby place (3) is automated, and is performed unattended or with a small number of people.
[0021]
A waiting vehicle guidance system (10, 20) according to the present invention includes a parking space (21) and a work place (2) in which a second sensor (22) for detecting the presence or absence of an empty parking space (21) is installed. When the second sensor (22) detects an empty parking space (21), the traffic light (13) further emits a signal (15) for permitting movement to the first waiting place (3).
[0022]
According to such a standby vehicle guidance system, guidance from the second standby place (4) to the work place (2) is performed at an appropriate timing when an empty space is created in the work place (2). According to such a standby vehicle guidance system, the guidance from the second standby place (4) to the first standby place (3) is automated, and is performed unattended or with a small number of people.
[0023]
A waiting vehicle guidance system (20, 20a) according to the present invention uses at least one of a signal from a first sensor (11) and a signal from a second sensor (22) to stop a parking space (12). The traffic light (13) calculates the estimated number (N) of vehicles that can be accommodated in the space (21) and permits the estimated number (N) of vehicles waiting at the second waiting area (4) to move. ) Is provided with a control device (30).
[0024]
According to such a standby vehicle guidance system (20, 20a), the vehicle (5) is guided from the second standby place (4) to the first standby place (3) or the work place (2) at an appropriate timing. Such a standby vehicle guidance system smoothly guides the vehicle (5) in a facility where the vehicle (5) frequently enters and exits.
[0025]
A standby vehicle guidance system (10, 20, 20a) according to the present invention detects a vehicle (5) exiting from a second standby place (4) and transmits a signal to a traffic signal (13) by a third sensor (18). When the signal (13) receives the signal from the third sensor (18), the signal (13) issues a signal (14) prohibiting movement to the first waiting place (3).
[0026]
According to such a standby vehicle guidance system (10, 20, 20a), guidance from the second standby place (4) to the first standby place (3) is performed at an appropriate timing. Such a standby vehicle guidance system (10, 20, 20a) guides the vehicle (5) at an appropriate timing in a facility where the vehicle (5) frequently enters and exits.
[0027]
The waiting vehicle guidance system (20, 20a) according to the present invention includes at least one of a signal from the first sensor (11), a signal from the second sensor (22), and a signal from the third sensor (18). Is used to calculate the estimated number (N) of vehicles (5) that can accommodate the parking space (12) and the stopping space (21), and the estimated number (N) of vehicles waiting at the second waiting area (4) Control device (30, 30a) for controlling the traffic signal (13) so as to permit the vehicle (5) to move.
[0028]
According to the standby vehicle guidance system (20, 20a), the vehicle (5) is guided at an appropriate timing even in a facility where the vehicle (5) frequently enters and exits. According to such a standby vehicle guidance system (20, 20a), the vehicle (5) is smoothly guided even in a facility where the vehicle (5) frequently enters and exits. According to such a standby vehicle guidance system (20, 20a), even in a facility where the vehicle (5) frequently enters and exits, the number of vehicles (5) waiting on a public road near the work area (2) is reduced, and this gives the surrounding environment. The effects of noise or exhaust gas or traffic obstruction are reduced.
[0029]
In the waiting vehicle guidance system (10, 20, 20a) according to the present invention, it is preferable that the parking space (21) is plural and the second sensor (22) is installed in each parking space (21).
[0030]
A waiting vehicle guidance system (20, 20a) according to the present invention includes at least one of a signal from a first sensor (11) or a signal from a second sensor (22) and a signal from a third sensor (18). Is used to calculate the estimated number (N) of vehicles (5) that can accommodate at least one of the parking space (12) and the stop space (21), and the estimated number (N) is calculated from the second waiting place (4). ) Is preferably provided with devices (30, 30a) for controlling the traffic light (13) so as to permit the vehicle (5) to move. According to such a standby vehicle guidance system (20, 20a), the vehicle (5) is guided at an appropriate timing even in a facility where the vehicle (5) frequently enters and exits.
[0031]
【The invention's effect】
According to the present invention, a standby vehicle guidance system that guides a standby vehicle at an appropriate timing is provided.
Further, according to the present invention, there is provided a standby vehicle guidance system for guiding a standby vehicle unattended.
Further, according to the present invention, there is provided a standby vehicle guidance system that reduces the influence on the surrounding environment.
Further, according to the present invention, there is provided a standby vehicle guidance system for smoothly guiding a truck in a factory where the number of traffic of the truck is large.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a factory 1 to which a standby vehicle guidance system 10 according to the present invention is applied. The factory 1 is built adjacent to the general road 6. The factory 1 is provided with gates 7 and 8. The truck 5 carrying the load to the factory 1 enters and exits between the general road 6 and the factory 1 through the gates 7 and 8.
[0033]
In the site of the factory 1, an unloading place 2 is provided. An intermediate waiting place 3 is provided near the unloading place 2. In the premises of the factory 1, a waiting area 4 is provided at a location away from the unloading area 2. The waiting area 4 may be provided outside the site of the factory 1. The truck 5 enters from the gate 7 and waits at the waiting area 4. When guided, the truck 5 exits from the gate 7, passes through the general road 6, enters from another gate 8, and moves to the intermediate waiting area 3 or the unloading area 2. .
[0034]
Referring to FIG. 2, a plurality of platforms 21 for loading and unloading work with truck 5 parked in unloading area 2 are provided.
[0035]
The intermediate waiting place 3 is provided at a position where the user can visually recognize whether the truck 5 is on the platform 21 or is empty. The intermediate waiting place 3 has a parking space 12 in which one truck 5 can be parked. When the traffic volume of the trucks 5 in the unloading area 2 is large, it is desirable that the intermediate waiting area 3 is provided with equipment capable of parking a plurality of trucks 5. The intermediate waiting area 3 only needs to be large enough to park one truck or two or three trucks. Therefore, there is no need to provide a large waiting area near the unloading area 2 that can accommodate all waiting vehicles. In the intermediate waiting area 3, a sensor 11 for detecting whether the truck 5 is in the parking space 12 or is empty is installed.
[0036]
The sensor 11 includes an antenna of a short-range communication system that communicates with an on-vehicle device mounted on the truck 5, a sensor that detects the presence or absence of the truck 5 by sensing weight, and captures an image by capturing an image. A sensor that determines the presence / absence of the track 5 by using a sensor and a sensor that includes a light receiving element and determines the presence / absence of the track 5 based on a difference in light hit depending on the presence or absence of the track are exemplified.
[0037]
Referring to FIG. 3, the waiting area 4 includes a parking space 12 in which a plurality of trucks can be parked. The waiting area 4 is provided with an entrance 16 for the truck 5 to enter and an exit 17 for the truck 5 to exit. At the exit 17, a sensor 18 for detecting passage of the truck 5 is provided.
[0038]
The waiting area 4 is further provided with a traffic light 13 near the exit 17. The traffic light 13 includes a red signal 14 for prohibiting the truck 5 from leaving the waiting area 4 and heading to the unloading area 2 or the intermediate waiting area 3, and a green signal 15 for permitting. Instead of the red signal 14 and the blue signal 15, "advance" and "stop" may be displayed. The exit 17 is preferably further provided with a gate (not shown) which is closed when the traffic light 13 is at the red light 14 and opened when the traffic light 13 is at the blue light 15.
[0039]
FIG. 4 shows a configuration of the waiting vehicle guidance system 10. A signal detected by the sensor 11 installed in the intermediate waiting place 3 is transmitted to the control device 19. A signal detected by the sensor 18 installed in the waiting place 4 is transmitted to the control device 19. The control device 19 controls the traffic light 13 using signals transmitted from the sensors 11 and 18 and selectively displays either the red signal 14 or the blue signal 15. The place where the control device 19 is installed may be inside or outside the waiting place 4.
[0040]
FIG. 5 is a timing chart showing the operation of the standby vehicle guidance system 10. The horizontal axis is time t₀Indicates a time starting from.
[0041]
Time t₀, The traffic light 13 is a red light 14, the intermediate waiting area 3 is full, and the unloading area 2 is full.
[0042]
Time t₁In, the truck 5 stopped on the platform 21 finishes unloading and exits the platform 21. The driver of the truck 5 waiting at the intermediate waiting place 3 starts moving toward the platform 21 when visually recognizing that an empty space has been created on the platform 21. The sensor 11 detects that the intermediate waiting place 3 is empty and sends a signal to the control device 19. The control device 19 that has received the signal causes the traffic light 13 to display the green light 15. When the driver of the truck 5 stopped at the waiting place 4 sees the green light 15, the driver leaves for the intermediate waiting place 3.
[0043]
Time t₂, The sensor 18 detects that the truck 5 has passed the exit 17 of the waiting place 4 and sends a signal to the control device 19. The control device 19 that has received the signal causes the traffic light 13 to display the red signal 14.
[0044]
The truck 5 that has departed from the intermediate waiting area 3 is at time t₃Arrives at the unloading area 2 and starts unloading.
[0045]
The truck 5 that has departed from the waiting area 4 is at time t₄Arrives at the intermediate waiting place 3.
[0046]
Time t₅In, the truck 5 stopped on the platform 21 finishes unloading and exits the platform 21. Thereafter, at time t₁To time t₄The above operation is repeated.
[0047]
According to such a standby vehicle guidance system 10, the truck 5 is guided from the standby area 4 to the unloading area 2 by an unmanned or a small number of people. Such a standby vehicle guidance system 10 has a simple configuration and is inexpensive. According to such a standby vehicle guidance system 10, the truck 5 is guided to the unloading site 2 in a short time when a vacant space is created in the unloading site 2 because the truck 5 is waiting at the intermediate standby site 3. The efficiency of unloading is improved. The traffic signal 13 is controlled by a signal from the sensor 11 installed in the intermediate waiting area 3, so that the truck 5 stopped in the waiting area 4 is guided to the intermediate waiting area 3 at an appropriate timing. The provision of the intermediate waiting area 3 prevents the truck 5 arriving at the factory 1 from entering the unloading area 2 sideways later. The provision of the intermediate waiting area 3 allows the driver of the truck 5 to move to the unloading area 2 in a short time, so that the motive to park on the road near the unloading area 2 is reduced, and the on-street parking is reduced. .
[Second embodiment]
The vehicle guidance system 20 according to the second embodiment is particularly preferably used in a factory 1 having a large physical flow rate. The vehicle guidance system 20 according to the second embodiment guides the trucks 5 particularly efficiently in a situation where a plurality of trucks 5 go out of the unloading area 2 in a short time.
[0048]
Referring to FIG. 1, factory 1, unloading area 2, intermediate waiting area 3, waiting area 4, general road 6, gate 7, and gate 8 in the second embodiment are the same as those in the first embodiment. .
[0049]
Referring to FIG. 6, a plurality of platforms 21 for unloading work with the truck 5 parked in the unloading area 2 are provided. Each of the platforms 21 is provided with a sensor 22 for detecting whether the truck 5 enters the platform 21 or is empty.
[0050]
The intermediate waiting place 3 is provided at a position where the user can visually recognize whether the truck 5 is on the platform 21 or is empty. When the traffic volume of the truck 5 in the unloading area 2 is large, it is preferable that the intermediate standby area 3 includes a plurality of parking spaces 12 in which the truck 5 can park. Each of the parking spaces 12 is provided with a sensor 11 for detecting whether the vehicle is empty or full.
[0051]
If the intermediate waiting field 3 is not provided at a position where the user can visually recognize whether the truck 5 is in the platform 21 or is empty, a signal indicating that a vacant space has been created on the platform 21 in the intermediate waiting field 3 (illustrated) Is not installed. According to the vehicle guidance system provided with such a traffic light (not shown), the degree of freedom of the place where the intermediate standby place 3 is installed increases.
[0052]
FIG. 7 shows a configuration of a waiting vehicle guidance system 20 according to the second embodiment. The signals detected by the sensors 11, 22, and 18 are transmitted to the waiting vehicle guidance device 30. The waiting vehicle guidance device 30 is connected to the control device 19. The control device 19 is connected to the traffic light 13 and controls the traffic light 13 to display either the red signal 14 or the blue signal 15. The traffic signal 13 preferably further includes a display unit for displaying a number indicating how many trucks 5 may move.
[0053]
FIG. 8 shows the configuration of the standby vehicle guidance device 30. The standby vehicle guidance device 30 includes an input device 31 to which signals from the sensors 11, 18, and 22 are input, an arithmetic device 32 connected to the input device 31, a storage device 33 connected to the arithmetic device 32, And an output device 34 connected to the device 32 for sending a signal to the control device 19.
[0054]
FIG. 9 shows the storage device 33. The storage device 33 stores a waiting vehicle guidance program 40. The waiting vehicle guidance program 40 is a computer program that can be read and executed by the arithmetic device 32. The waiting vehicle guidance program 40 further includes variables N, N₁, N₂, N₃, N₄, N₅, N₆, N₇, F, T₁, T₂, T_a, T_b, T_c, T_dIs stored. N, N₁, N₂, N₃, N₄, N₅, N₆, N₇Is a time-dependent function.
[0055]
The variables stored in the storage device 33 indicate the following, respectively.
[0056]
N indicates the number of trucks 5 that allow the standby vehicle guidance device 30 to move toward the intermediate standby site 3 or the unloading site 2 for the trucks 5 waiting at the standby site 4.
[0057]
N₁Is the number of vacant platforms 21 in the unloading hall 2. However, the truck 5 heading from the intermediate waiting place 3 to the unloading place 2 is counted assuming that it has arrived at the unloading place 2.
[0058]
N₂Is the number of vacant parking spaces 12 in the intermediate waiting area 3.
[0059]
N₃Is the number of trucks 5 that have exited the exit 17 of the waiting area 4 and have not yet arrived at the intermediate waiting area 3 or the unloading area 2.
[0060]
N₄Is the number of times the sensor 18 has detected the track 5.
[0061]
N₅Is the number of trucks 5 arriving from the waiting place 4 to the intermediate waiting place 3 or the unloading place 2.
[0062]
N₆Is the number of trucks 5 arriving at the intermediate standby place 3.
[0063]
N₇Is the set time T after all the parking spaces 12 in the intermediate waiting area 3 become empty.₁This is the number of trucks 5 that have arrived at the unloading yard 2 after the above.
[0064]
F is a flag variable that takes a value of F = 1 when performing a process of permitting a plurality of trucks 5 to move from the waiting place 4 to the intermediate waiting place 3 or the unloading place 2.
[0065]
T₁Is a preset time. T₁Is preferably set such that the time required for the truck 5 to move from the intermediate standby place 3 to the platform 21 is set as a reference time, and the reference time is given a margin. For example, if the reference time is 1 minute, T₁Is set to 2 minutes.
[0066]
T₂Is the lower limit of the time during which the traffic light 13 displays the red light 14. When the red light 14 is displayed, the waiting vehicle guidance device 30 displays at least T₂A signal is sent to the control device 19 so that the green signal 15 is not displayed unless the time has elapsed.
[0067]
t_aIndicates the time when an empty space is created on the platform 21 of the unloading area 2.
[0068]
t_bIndicates the time when the truck 5 enters the platform 21 which was an empty space.
[0069]
t_cIndicates the time at which all the parking spaces 12 become empty due to the movement of the truck 5 from the intermediate standby place 3.
[0070]
t_dIs a variable that stores the time when the condition that the condition that the red light 14 is displayed is not satisfied when N is 2 or more is satisfied is satisfied.
[0071]
N is the following equation
N = N₁+ N₂-N₃
Obtained by The right side of this equation shows the sum of the empty space of the unloading area 2 and the empty area of the intermediate waiting area 3 minus the number of trucks 5 heading to the unloading area 2 or the intermediate waiting area 3. I have. When the N trucks 5 in the waiting area 4 are allowed to move using the N given by this equation, the truck 5 goes to the unloading area 2 or the intermediate waiting area 3 without any excess or shortage.
[0072]
N₃Is
N₃= N₄-N₅
Given by
[0073]
N₅Of the trucks 5 arriving at the intermediate waiting area 3 from the waiting area 4 are N₆Indicated by N₅Furthermore, the number of trucks 5 that have moved directly from the waiting area 4 to the unloading area 2 without approaching the intermediate waiting area 3 when the parking spaces 12 of the intermediate waiting area 3 are all empty are included. However, from the time when all the parking spaces 12 are empty, the set time T₁, The truck 5 arriving at the unloading yard 2 is considered to be the truck 5 coming from the intermediate waiting yard 3, and N₅Is not counted. Therefore N₅Is
N₅= N₆+ N₇
Given by
[0074]
After all, N is a variable that can be known using the sensors 11, 18, and 22.₁, N₂, N₄, N₆, N₇Using the following equation
N = N₁+ N₂-N₄+ N₆+ N₇
Given by
[0075]
The operation of the standby vehicle guidance system 20 having the above configuration will be described in detail below. However, in the following description, the operation that the arithmetic device 32 reads and executes the standby vehicle guidance program 40 will be described as the operation performed by the standby vehicle guidance program 40.
[0076]
10 to 12 are flowcharts showing the operation of the waiting vehicle guidance system 20.
[0077]
Referring to FIG. 10, when standby vehicle guidance system 20 is activated, standby vehicle guidance program 40 initializes variables stored in storage device 33 (step S1).
[0078]
If the sensor 22 of the unloading hall 2 does not detect an empty space, the standby vehicle guidance program 40 proceeds to step S7 (No in step S2). When the sensor 22 detects that the platform 21 on which the truck 5 has stopped becomes an empty space (step S2 Yes first time), the standby vehicle guidance program 40 sets the time to t._aIs stored in the storage device 33 (step S3). When the sensor 22 detects again that the platform 21 which was the empty space is the empty space (step S2 Yes, the second time or later), all the parking spaces 12 in the intermediate standby area 3 are empty and the time is t._c+ T₁It is determined whether the condition that the time has passed is satisfied (step S4). If the condition is satisfied (step S4 Yes), N₁Is added to, and the process moves to step S7. If the condition is not satisfied (No in step S4), the time becomes t_a+ T₁Is determined (step S6), and if it has passed (Yes at step S6), N₁Is added to, and the process proceeds to step S7. If it has not passed (No in step S6), the process directly proceeds to step S7.
[0079]
If the sensor 22 of the unloading hall 2 does not detect the truck 5, the standby vehicle guidance program 40 proceeds to Step S18 (Step S7 No). When the sensor 22 detects that the truck 5 has entered the vacant platform 21 (step S7, first time), the waiting vehicle guidance program 40 sets the time to t._bIs stored in the storage device 33 (step S8). When the sensor 22 again detects that the track 5 has entered the platform 21 in which the truck 5 has entered (step S7 Yes and subsequent times), the time becomes t._a+ T₁Is determined (step S9). Time is t_a+ T₁Is exceeded (step S9 Yes), N₁Then, the process goes to step S18 by subtracting 1, and if it is not past (No in step S9), the process directly goes to step S18.
[0080]
The waiting vehicle guidance program 40 counts the number of vacant parking spaces 12 using a signal transmitted from the sensor 11 installed in the intermediate waiting place 3,₂Is stored in the storage device 33 (step S11).
[0081]
Referring to FIG. 11, when the truck 5 arrives at the intermediate standby place 3 (Step S18 Yes), the standby vehicle guidance program 40 receiving the signal from the sensor 11 sets N₆Is added to (step S20). If the truck 5 has not arrived at the intermediate waiting place 3, the process directly proceeds to Step S22 (Step S18 No).
[0082]
When the sensor 11 detects that there is a parking space 12 that is not empty in the intermediate standby place 3, the standby vehicle guidance program 40 proceeds to step S30 (No in step S22). When the sensor 11 detects that all the parking spaces 12 in the intermediate standby area 3 are empty (Step S22: Yes first time), the standby vehicle guidance program 40 determines the time t_cIs stored in the storage device 33 (step S24). When the sensor 11 detects again that all the parking spaces 12 in the intermediate standby space 3 are empty (step S22 Yes, the second time or later), the standby vehicle guidance program 40 determines that the time is t_cIt is determined whether or not the condition that the truck 5 arrives at the unloading hall 2 after + T is satisfied (step S26). If the condition is not satisfied, the process moves to step S30 (step S26 No). If the condition is satisfied (Step S26 Yes), N₇Is added to (step S28).
[0083]
The standby vehicle guidance program 40 is given by the equation N = N₁+ N₂-N₄+ N₆+ N₇Is calculated on the basis of (step S30).
[0084]
Referring to FIG. 12, when N is 0, standby vehicle guidance program 40 proceeds to step S4 (step S32 Yes). When N is not 0 (Step S32 No), it is determined whether F is 0 or 1 (Step S33). When F = 0 (No at Step S33), it is determined whether N is 2 or more (Step S34). When N is not 2 or more, the process proceeds to step S42 (step S34 No). When N is 2 or more (Step S34 Yes), F = 1 is set, and the routine goes to Step S36 (Step S35).
[0085]
The waiting vehicle guidance program 40 determines whether or not the traffic light 13 is displaying the red light 14 (step S36). When the green signal 15 is displayed (No at Step S36), the process proceeds to Step S4. When the green signal 15 is changed to the red signal 14 (step S36, first time), the time is set to t._dIs stored in the storage device 33, and the process proceeds to step S46 (step S38). When the traffic signal 13 continues to display the red signal 14 (step S36 Yes and later), the time is t_d+ T₂Is determined (step S40). Time is t_d+ T₂If not, the process proceeds to step S46 (No in step S40). Time is t_d+ T₂(Step S40 Yes), the waiting vehicle guidance program 40 sends a signal to the control device 19 so that the traffic light 13 displays the green signal 15 (Step S42), and N₄Is added to (step S44).
[0086]
When the sensor 18 detects the passage of the truck 5 (Step S46 Yes), the waiting vehicle guidance program 40 sends a signal to the control device 19 so that the traffic light 13 displays the red signal 14 (Step S48). N₄Is added to (step S50).
[0087]
The standby vehicle guidance program 40 determines whether or not N = 0 (step S52), and if N = 0, sets F = 0 (step S54).
[0088]
According to the procedure of steps S33 to S54, the waiting vehicle guidance program 40 allows the two or more trucks 5 waiting at the waiting place 4 to move toward the unloading place 2. When the traffic light 13 sends a signal to the control device 19 so as to display the green signal 15, when one truck 5 exits the exit 17, a predetermined time T₂During this time, the red light 14 is displayed once, and then the green light is displayed again. T₂Is set, for example, between 3 seconds and 5 seconds. According to such a procedure, it is easy for the driver of the truck 5 to know whether the truck 5 should go further toward the unloading place 2 after the truck 5 has left the exit 17 toward the unloading place 2.
[0089]
FIG. 13 is a first timing chart showing the operation of the standby vehicle guidance system 20. The horizontal axis is time t₀Indicates a time starting from. It is assumed that the parking space 12 provided in the intermediate waiting area 3 is for one vehicle.
[0090]
Time t₀, The traffic light 13 is a red light 14, the intermediate waiting area 3 is full, and the unloading area 2 is full.
[0091]
Time t₁₁, The truck 5 leaves the unloading hall 2. The sensor 22 that has detected that the platform 21 has become an empty space sends a signal to the waiting vehicle guidance device 30. When the driver of the truck 5 waiting at the intermediate waiting place 3 recognizes that the platform 21 has become an empty space, the driver starts moving the truck 5 toward the platform 21.
[0092]
When the sensor 11 installed in the intermediate standby place 3 detects the empty parking space 12, it sends a signal to the standby vehicle guidance device 30. Standby vehicle guidance device 30 is N₂Is added to, and as a result N increases by one, so that the traffic light 13 sends a signal to the control device 19 so that the green signal 15 is displayed. When the driver of the truck 5 stopped at the waiting place 4 sees the green light 15, the driver leaves for the intermediate waiting place 3.
[0093]
Since there is no longer any truck 5 waiting in the intermediate waiting area 3, t is determined in step S24._cT₁₁Is substituted.
[0094]
Time t₁₂, The sensor 18 detects that the truck 5 has passed through the exit 17 of the waiting place 4 and sends a signal to the waiting vehicle guidance device 30. The waiting vehicle guidance device 30 that has received the signal issues a command to the traffic signal 13 to display the red signal 14.
[0095]
Time t_Thirteen, The truck 5 arrives from the intermediate waiting place 3 to the unloading place 2. Time t required for movement_Thirteen-T₁₁Is a predetermined time T₁Shorter than. Therefore, according to the procedure of step S6No, N₁Does not change. Therefore, the time t₁₁To t_ThirteenIn the meantime, the sensor 11 in the intermediate waiting area 3 and the sensor 22 in the unloading area 2 detect two empty spaces in total, but one truck 5 in the waiting area 4 You will be given permission to move.
[0096]
Time t₁₄, The truck 5 leaves the unloading hall 2. The sensor 22 that has detected that the platform 21 has become an empty space sends a signal to the waiting vehicle guidance device 30. Time t₁₄In step S6, N does not change in accordance with the procedure of step S6No, and the green signal 15 is not output to the standby area 4.
[0097]
Time t_Fifteen, There is no truck 5 waiting at the intermediate waiting place 3 and the time is t_c+ T₁Has been reached. Therefore, N is determined by step S4Yes.₁Is added to N, N is increased by 1, and the green signal 15 is output to the waiting area 4. When the driver of the truck 5 stopped at the waiting place 4 sees the green light 15, the driver leaves for the intermediate waiting place 3. Time t₁₂, The sensor 18 detects that the truck 5 has passed through the exit 17 of the waiting place 4 and sends a signal to the waiting vehicle guidance device 30. The waiting vehicle guidance device 30 that has received the signal sends a signal to the control device 19 so that the traffic light 13 displays the red signal 14.
[0098]
Time t₁₇, The truck 5 that has departed from the waiting place 4 arrives at the unloading place 2. The driver of the truck 5 visually recognizes that there is a vacant platform 21 in the unloading area 2, and puts the truck 5 into the platform 21.
[0099]
Time t₁₈, The truck 5 that has left behind from the waiting place 4 arrives at the intermediate waiting place 3.
[0100]
FIG. 14 is a second timing chart illustrating the operation of the vehicle guidance system according to the second embodiment. The horizontal axis is t₀Indicates a time starting from. The intermediate waiting place 3 has parking spaces 12 for two vehicles.
[0101]
The upper line in FIG. 14C indicates that the truck 5 is stopped on all platforms 21 of the unloading area 2. The line in FIG. 14C indicates that there is one platform 21 in which the truck 5 is not stopped and is an empty space. The lower line in FIG. 14C indicates that there are two platforms 21 in which the truck 5 is not stopped and is an empty space.
[0102]
Time t₀, The traffic light 13 is a red light 14, the intermediate waiting area 3 is full, and the unloading area 2 is full.
[0103]
Time t₂₁, The truck 5 leaves the unloading hall 2. The sensor 22 that has detected that the platform 21 has become an empty space sends a signal to the waiting vehicle guidance device 30. When the driver of the truck 5 waiting at the intermediate waiting place 3 visually recognizes that the platform 21 has become an empty space, the driver of the truck 5 starts moving the truck 5 toward the platform 21.
[0104]
When the sensor 11 installed in the intermediate standby place 3 detects the empty parking space 12, it sends a signal to the standby vehicle guidance device 30. Standby vehicle guidance device 30 is N₂Is added to, and as a result N increases by one, so that the traffic light 13 sends a signal to the control device 19 to display the green light 15. When the driver of the truck 5 stopped at the waiting place 4 sees the green light 15, the driver leaves for the intermediate waiting place 3.
[0105]
Time t₂₂In this case, the truck 5 is separated from the unloading area 2 and the number of platforms 21 which have become empty places becomes two. The sensor 22 that has detected that the platform 21 has become an empty space sends a signal to the waiting vehicle guidance device 30.
[0106]
When the driver of the truck 5 waiting at the intermediate waiting place 3 visually recognizes that the platform 21 has become an empty space, the driver of the truck 5 starts moving the truck 5 toward the platform 21.
[0107]
When the sensor 11 installed in the intermediate standby place 3 detects the empty parking space 12, it sends a signal to the standby vehicle guidance device 30. Standby vehicle guidance device 30 is N₂, So that N is increased by one. Time t as shown₂₂Is the time t at which the truck 5 exits from the waiting area 4₂₅If it is earlier than this, N = 2. At this time, F = 1 is set as shown in step S35.
[0108]
Time t₂₃, The truck 5 that has left the intermediate waiting place 3 first arrives at the unloading place 2. Time t₂₄, The truck 5 having left the intermediate waiting place 3 later arrives at the unloading place 2.
[0109]
Time t₂₅At 5, the truck 5 exits from the exit 17 of the waiting area 4. The sensor 18 detects the truck 5 and sends a signal to the waiting vehicle guidance device 30. The waiting vehicle guidance program 40 sends a signal to the control device 19 so that the traffic light 13 displays the red signal 14 as shown in steps S46 to S50, and N₄Add 1 to. As a result, N decreases by 1 and N = 1.
[0110]
Time t when the signal turns red at F = 1₂₅Is the time t, as shown in step S38._dIs stored as Time t₂₅+ T₂At step S40, the green signal 15 is displayed as shown in steps S40 to S42. When the driver of the truck 5 stopped at the waiting place 4 sees the green light 15, the driver leaves for the intermediate waiting place 3. Time t₂₆When the truck 5 exits at the exit 17, the sensor 18 detects the truck 5 and sends a signal to the waiting vehicle guidance device 30. The waiting vehicle guidance program is N₄Add 1 to. As a result, N is reduced by 1 and N = 0. As a result, F = 0 in steps S52 to S54.
[0111]
According to the waiting vehicle guidance system 20 of the present invention, when a plurality of trucks 5 move from the unloading place 2 or the intermediate waiting place 3, the number of trucks 5 that can just accommodate the unloading place 2 and the intermediate waiting place 3 Is guided from the waiting place 4. According to the waiting vehicle guidance system of the present invention, the truck 5 is efficiently guided. According to the waiting vehicle guidance system 20 of the present invention, an appropriate number of trucks 5 are guided to the unloading hall 2. According to the waiting vehicle guidance system 20 of the present invention, confusion in which it is difficult to know which truck 5 enters the platform 21 near the landing 2 is avoided. According to the waiting vehicle guidance system 20 of the present invention, the guidance of the truck 5 is smoothly performed in the factory 1 where the truck 5 frequently enters and exits.
[0112]
FIG. 15 shows a modification of the second embodiment. The unloading area 2a and the unloading area 2b are unloading areas having different usage forms. For example, parts transported daily are loaded into the unloading area 2a, and parts transported once a week are loaded into the unloading area 2b. Is done. In each of the unloading areas 2a and 2b, sensors 22a and 22b are provided for each platform 21. Two intermediate waiting areas 3a, 3b are provided corresponding to the unloading areas 2a, 2b, respectively, and sensors 11a, 11b are installed in each of them.
[0113]
The waiting place 4 is provided with two exits, and each exit is provided with sensors 18a and 18b for detecting that the truck 5 has passed through the exit. Traffic lights 13a and 13b are provided near the exit.
[0114]
The standby vehicle guidance device 30a, the sensor 22a, the sensor 11a, the sensor 18a, and the traffic light 13a operate in the same manner as the sensor 22, the sensor 11, the sensor 18, and the traffic light 13 in the second embodiment. The standby vehicle guidance device 30a, the sensor 22b, the sensor 11b, the sensor 18b, and the traffic light 13b perform the same operation as the sensor 22, the sensor 11, the sensor 18, and the traffic light 13 in the second embodiment.
[0115]
The standby vehicle guidance system 20a in this modified example efficiently guides the truck 5 in a factory having a plurality of business forms of transportation by providing two sets of the standby vehicle guidance system 20 of the second embodiment.
[Brief description of the drawings]
FIG. 1 shows a factory where a standby vehicle guidance system is installed.
FIG. 2 shows an unloading place and an intermediate waiting place according to the first embodiment.
FIG. 3 shows a waiting field.
FIG. 4 shows a configuration of a standby vehicle guidance system according to the first embodiment.
FIG. 5 is a timing chart showing an operation of the standby vehicle guidance system according to the first embodiment.
FIG. 6 shows an unloading place and an intermediate waiting place in the second embodiment.
FIG. 7 shows a configuration of a standby vehicle guidance system according to the first embodiment.
FIG. 8 shows a configuration of a standby vehicle guidance device.
FIG. 9 illustrates a storage device.
FIG. 10 is a flowchart showing the operation of the standby vehicle guidance system.
FIG. 11 is a flowchart showing the operation of the standby vehicle guidance system.
FIG. 12 is a flowchart showing the operation of the standby vehicle guidance system.
FIG. 13 is a timing chart showing the operation of the standby vehicle guidance system.
FIG. 14 is a timing chart showing the operation of the waiting vehicle guidance system.
FIG. 15 shows a configuration of a standby vehicle guidance system.
[Explanation of symbols]
1… Factory
2, 2a, 2b ... unloading area
3, 3a, 3b ... intermediate waiting area
4: Waiting area
6. General road
7 ... Gate
8 ... Gate
10. Standby vehicle guidance system
11, 11a, 11b ... sensors
12 ... Parking space
13, 13a, 13b ... traffic light
14 ... Red light
15 ... green light
16 ... Entrance
17, 17a, 17b ... exit
18, 18a, 18b ... sensors
19, 19a, 19b ... control device
20, 20a ... standby vehicle guidance system
21 ... Platform
22, 22a, 22b ... sensors
30. Standby vehicle guidance device
31 input device
32 arithmetic unit
33 ... Storage device
34 output device
40: Standby vehicle guidance program

Claims (7)

A first sensor that is installed in a first waiting area and detects whether there is an empty parking space in the first waiting area;
A signal that is installed in a second waiting area, and that outputs a signal permitting movement to the first waiting area when the first sensor detects the empty parking space,
Standby vehicle guidance system. In claim 1,
Further, a second sensor is provided in the work place, and detects whether there is an empty stop space in the work place,
The traffic signal further outputs a signal permitting movement to the first waiting place when the second sensor detects the vacant stop space,
Standby vehicle guidance system. A first waiting area having a parking space and having a first sensor for detecting the presence or absence of the empty parking space;
When the first sensor detects the vacant parking space, there is provided a second waiting place provided with a traffic light that outputs a signal permitting movement to the first waiting place,
Standby vehicle guidance system. In claim 3,
Further, a work space provided with a stop space and a second sensor for detecting the presence or absence of the vacant stop space is provided,
The traffic signal further outputs a signal permitting movement to the first waiting place when the second sensor detects the vacant stop space.
Standby vehicle guidance system. In claim 2 or 4,
Further, using at least one of a signal from the first sensor and a signal from the second sensor, an estimated number of vehicles that can accommodate the parking space and the stop space is calculated, and the second standby Comprising a control device that controls the traffic light so as to permit movement of the estimated number of vehicles waiting in the field,
Standby vehicle guidance system. In any one of claims 1 to 5,
Further, a third sensor is provided for detecting that a vehicle exits from the second waiting place and transmitting a signal to the signal.
The traffic signal, when receiving a signal from the third sensor, issues a signal prohibiting movement to the first standby place,
Standby vehicle guidance system. In claim 6,
Further, using at least one of a signal from the first sensor, a signal from the second sensor, and a signal from the third sensor, estimating a vehicle that can accommodate the parking space and the stop space. Calculating a number of vehicles, comprising a control device for controlling the traffic light so as to permit movement of the estimated number of vehicles waiting at the second standby field,
Standby vehicle guidance system.

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