JPH0581599A - Avm system - Google Patents

Abstract

PURPOSE:To improve the efficiency of vehicle allocation by registering the target place of a mobile station to a base station when the mobile station becomes a loaded vehicle and judging the vehicle is scheduled to be empty at the step of when the mobile station comes into a prescribed range from the target place. CONSTITUTION:At the point of the time of becoming a loaded vehicle, a decorded target place 50 is inputted from the mobile station to the base station with an AVM operating equipment and registered. Afterward, the approaching situation of the mobile station to the target place 50 is automatically point- grasped with a self-contained navigation system and displayed on the display of the base station. At the point of the time when the mobile station enters the prescribed range from the set target place, the vehicle is judged to be a empty scheduled vehicle and processed as a next allocation objective vehicle. The prescribed limit from the target place 50 is set in a way such as 51 for a crowded time and 52 for a slack time. Then, the present position of the mobile station enters the prescribed range from the target place 50, the vehicle is automatically handled as the empty scheduled vehicle so that the next allocation can be indicated before the mobile station arrives at the target place.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an AVM system,
More specifically, the present invention relates to an AVM system that can monitor the current position of a mobile station and is mainly used by taxi companies and the like.

[0002]

2. Description of the Related Art Judgment of a vacant vehicle in a conventional AVM system (determining whether a mobile station approaches a destination or executing a vacant vehicle schedule button operation or the like, and determining a vacant vehicle in a state immediately before vacant This is to increase the dispatch efficiency by treating it as a vehicle that can be dispatched and issuing a dispatch instruction when there is a dispatch request at a close position.) Is left to the subjective judgment of the driver. The vacant vehicle schedule registration was performed by operating the vacant vehicle schedule button installed in the mobile station based on subjective judgment.

[0003]

Since the above-described empty vehicle schedule judgment is made based on the subjective judgment of the driver, the empty vehicle schedule button may be operated too early or too late. If the operation time is too early, it may take an unexpected time to reach the destination due to an unexpected accident, traffic jam, etc.
If it is too late, from the perspective of the base station, the efficiency of the time-distributed vehicle will decrease when the operation of the empty vehicle schedule button is delayed from the proper time. In other words, from the perspective of the base station, there is a problem that the conventional empty vehicle schedule determination means cannot objectively grasp the empty vehicle schedule of the mobile station.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an AVM system having an automatic vacant vehicle schedule determination function and capable of objectively and accurately determining a vacant vehicle schedule.

[0005]

In order to achieve the above object, an AVM system according to the present invention is an AVM (Automatic Vehicle Monitoring) system capable of monitoring the current position of a mobile station. When it becomes, the destination registration means for registering the destination of the mobile station in the base station and the empty vehicle schedule determination means for determining that the mobile station is scheduled to be vacant when it enters the predetermined range from the destination. It has a feature.

[0006]

With the above arrangement, in the AVM (Automatic Vehicle Monitoring) system capable of monitoring the current position of the mobile station, the destination of the mobile station is registered in the base station when the mobile station becomes an actual vehicle. Since it has a destination registration means and a vacant vehicle schedule judgment means that judges that the mobile station will be vacant when it enters the predetermined range from the destination, it will automatically be activated when the mobile station enters the predetermined range from the destination. It is determined that the vehicle will be vacant. Therefore, the vacant train decision of the mobile station becomes objective and accurate.

[0007]

Embodiments of the AVM system according to the present invention will be described below with reference to the drawings. FIG. 1 is an AVM according to an embodiment.
It is the block diagram which showed the system roughly, and has shown an example of the self-contained navigation system which combined GPS (Global Positioning System) and dead reckoning.
The figure (a) shows the structure of a mobile station, and the figure (b) has shown the structure of a base station.

In FIG. 1A, the mobile station is roughly divided into an antenna / sensor unit 21, a location processing unit 11, and an AVM operator 31. The antenna / sensor unit 21 includes an antenna 22, a geomagnetic sensor 23, and a gyro 24. The location processing unit 11 includes an AVM processing unit 12, a location processing unit 13, and a GPS receiver 14.
To the operation unit 31, a call wave radio 32 and a charge meter (actual vehicle / empty vehicle) 33 are connected. The location processing unit 11 includes a vehicle speed sensor 25, sensors 23 and 24 in the antenna / sensor unit 21, an antenna 22 and an AV.
It is connected to the M operation device 31 and also the data wave radio 2
6 is also connected.

Information from the geomagnetic sensor 23, the gyro 24, and the vehicle speed sensor 25 is input to the location processing unit 13, and the radio waves from the GPS satellites are passed through the antenna 22 to the GP.
It is input to the S receiver 14. These vehicle sensors and GP
The location processing unit 13 determines the position of the mobile station based on the information from the S satellite. The determined position information is transmitted via the AVM processing unit 12 together with information indicating the vehicle activity status input from the AVM operator 31 (information required for dispatching destinations, arrivals, waiting periods, actual vehicles, empty vehicles, etc.). Data is transmitted from the data wave radio 26 to the base station.

FIG. 1B shows the structure of the base station,
Reference numeral 1 is a wireless device, 42 is a wireless modem device, and 43 is a workstation. The (position) information of the mobile station transmitted from the data wave radio 26 is received by the radio 41, converted into a computer signal by the radio modem device 42, and displayed on the display of the workstation 43. On the contrary, an instruction to dispatch a vehicle from the base station to the mobile station is converted from a computer signal to a wireless signal by the wireless modem device 42 and transmitted from the wireless device 41 to the mobile station. Vehicle dispatch information and the like from the base station to the mobile station is received by the call wave radio 32 and displayed on the display of the AVM operator 31.

As described above, since the current position of the mobile station is determined by the location processing unit 11 and automatically transmitted to the base station, the base station accurately grasps the current position of the mobile station at any place. be able to.

FIG. 2 is a schematic diagram showing a method of position determination in the location processing unit 13. When three or more GPS satellites are available, the location processing unit 13 calculates the absolute position (longitude, latitude) based on the position information from the GPS satellites received by the GPS receiver 14 through the GPS antenna 22. , The current position of the mobile station is determined. The absolute position is calculated by the following procedure. The instantaneous position of each satellite and the distance between each satellite and the mobile station are calculated based on the orbit information of each satellite and accurate time information transmitted from the GPS satellites. Then, a circle centered on each satellite is drawn with the calculated distance between each satellite and the mobile station as a radius. The absolute position of the mobile station is determined by calculating the intersection of the drawn circles in terms of longitude and latitude.

When the GPS satellite cannot be used in the shade of the building, underground, tunnel, etc., the current position of the mobile station is calculated by dead reckoning based on the information of the vehicle sensor. Information on the absolute direction from the geomagnetic sensor 23, the relative direction from the gyro 24, and the traveling distance from the vehicle speed sensor 25 is obtained by the location processing unit 1.
3 and the information from each sensor is cumulatively calculated every time the vehicle travels for a certain period of time. The current position of the mobile station is determined by combining the cumulatively calculated result and the absolute position immediately before the GPS satellite becomes unusable.

FIG. 3 shows a position determining method by a combination of a satellite positioning system using GPS satellites and dead reckoning using vehicle sensors. In FIG. 3, point A is an absolute position obtained by GPS, that is, the starting point, and point B is the current position of the mobile station, that is, the current position obtained by dead reckoning. In the figure, the solid line arrow indicates the running locus of the vehicle calculated from the geomagnetic sensor 23, the gyro 24, and the vehicle speed sensor 25, and the dotted line indicates the method of calculating the running locus. Geomagnetic sensor,
Based on the traveling direction of the vehicle obtained from the gyro (angular velocity sensor), the traveling distance of the vehicle obtained from the vehicle speed sensor is integrated every traveling for a certain period of time to determine the current position B point.

If the GPS satellite can be received again at the point B, if the absolute position is calculated by the GPS and there is a deviation from the position of the point B calculated by the dead reckoning navigation. , Point B is corrected to the absolute position.

In the above described embodiment, the GP
The absolute position can be determined by using the S satellite, and even if the GPS satellite signal cannot be received, the current position can be determined by dead reckoning based on the information from the vehicle sensor. Since the position information of the mobile station thus acquired is automatically transmitted to the base station through the AVM processing unit, the base station can acquire the current position of the mobile station at any point by points.

FIG. 4 is a follow chart showing the procedure of automatic empty vehicle schedule determination. When the vehicle becomes an actual vehicle, the destination registered in the base station is read from the mobile station (step 1). Next, the current position of the mobile station heading to the registered destination is confirmed on the display of the base station workstation 43 (step 2). Then, it is judged whether or not the current position of the mobile station is within a predetermined range from the destination (step 3). If the mobile station is not within the predetermined range from the destination, it is still treated as an actual vehicle (step 5), and if it is within the predetermined range from the destination, the mobile station is considered as an empty vehicle and the next vehicle to be dispatched. (Step 4).

FIG. 5 shows a method in the case where the automatic vacant schedule judgment of the mobile station is performed on the display of the base station workstation 43. The ▲ mark in the figure indicates the position of the mobile station (actual vehicle) heading to the destination at each time, and each position of the mobile station is a point grasped by the autonomous navigation system described with reference to FIGS. 1, 2 and 3. is there. Reference numeral 50 is a destination to which the mobile station faces, and 51 and 52 are predetermined ranges from the destination set for the destination 50. 53 is a predetermined range from the destination 5
1 shows the position of the mobile station that has entered the area 1, and 54 shows the position of the mobile station that has entered the predetermined range 52 from the destination. ▲
The broken line connecting the marks indicates the travel route of the mobile station.

When the vehicle becomes an actual vehicle, the encoded destination 50 is input from the mobile station to the base station from the AVM operator 31 and registered. Thereafter, the approach situation of the mobile station to the destination 50 is automatically grasped by the autonomous navigation system and displayed on the display of the base station. Then, when the mobile station enters a predetermined range from the set destination, it is determined that the vehicle is an empty vehicle and is processed as the next vehicle to be dispatched.
However, the setting of the predetermined range from the destination is variable depending on the time of day. For example, it is set as narrow as 51 at the time of congestion such as rush hour, and is set as wide as 52 at the time of off hours such as daytime. Therefore, the mobile station at point 53 is considered to be an empty vehicle regardless of the time of day, but
The mobile station of No. 4 is treated as an actual vehicle when it is congested, and as an empty vehicle when it is quiet.

As described above, when the current position of the mobile station is automatically grasped and the mobile station enters within a predetermined range from the destination, the mobile station is automatically treated as an empty vehicle. Before the mobile station arrives at the destination, the base station can issue the next vehicle dispatch instruction, and the vehicle dispatch efficiency can be improved.

[0021]

As described above in detail, the AVM according to the present invention
In the system, the current position of the mobile station can be monitored by an AVM (Automatic Vehicle
In the monitoring system, the destination registration means that registers the destination of the mobile station in the base station when the mobile station becomes an actual vehicle, and the empty vehicle that is judged to be vacant when the mobile station enters the predetermined range from the destination Since the schedule determining means is provided, the vacant schedule of the mobile station is automatically and accurately determined. Since the vacant schedule of the mobile station is automatically and accurately determined, the base station can issue the next vehicle dispatch instruction before the mobile station arrives at the destination, and the dispatch efficiency can be improved.

[Brief description of drawings]

1A and 1B show an embodiment of an AVM system according to the present invention, FIG. 1A is a schematic diagram showing a configuration of a mobile station, and FIG. 1B is a schematic diagram showing a configuration of a base station. Is.

FIG. 2 is a schematic diagram showing the periphery of a location processing unit for explaining a method for determining a current position of a mobile station.

FIG. 3 is a diagram showing a method of determining the position of a mobile station when radio waves from GPS satellites cannot be received.

FIG. 4 is a flowchart showing a procedure of automatic empty vehicle schedule determination.

FIG. 5 is a schematic diagram for explaining a method in the case where an automatic vacancy schedule determination of the mobile station is performed on the display of the workstation of the base station.

[Explanation of symbols]

11 Location Processing Unit 12 AVM Processing Unit 13 Location Processing Unit 14 GPS Receiver 21 Antenna / Sensor Unit 22 Antenna 23 Geomagnetic Sensor 24 Gyro 25 Vehicle Speed Sensor 26 Data Wave Radio 31 AVM Operator 32 Call Wave Radio 33 Charge Meter (Actual vehicle / empty vehicle) 41 Wireless device 42 Wireless modem device 43 Workstation 50 Destination 51 Predetermined range from destination during congestion 52 Predetermined range from destination during low traffic 53 Within predetermined range from destination during congestion The current position of the mobile station that has entered 54 The current position of the mobile station that has entered the predetermined range from the destination at the time of the outage

Claims (1)

[Claims] 1. An AVM (Automatic Vehicle Monitoring) system capable of monitoring the current position of a mobile station, wherein the destination of the mobile station is registered in a base station when the mobile station becomes an actual vehicle. An AVM system comprising: means and a means for determining an empty vehicle when the mobile station enters a predetermined range from a destination.