JPH039658B2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is applicable to a large number of vehicles scattered within a certain area and whose positions and dynamics (rental runs, premiums, empty cars, forwarding, areas, etc.) change irregularly. The present invention relates to a vehicle dynamic display device that allows a central base station to grasp the status of a vehicle. In more detail, taxi companies, bus companies, police, transportation companies, etc. manage a large number of vehicles, and base stations constantly update new data automatically to determine where and what each vehicle is currently doing. It is made so that it can be collected and displayed.

"Conventional technology" Conventionally, three methods have been feasible for vehicle dynamic display devices, especially for taxis: (1) semi-automatic method (manual setting method), (2) distributed transmission method, and (3) distributed reception method. known as something.

(1) Semi-automatic method Taxi business areas are divided into several areas as shown in Figure 1.
Divide it into several dozen blocks A, B, etc. and assign a number to each. When a customer orders a ride, the base station presses the corresponding district button. Then, a district-specific polling signal is emitted. This signal is received by all mobile stations (taxi radios), but if the driver has pressed the button for that area, it also matches the polling signal, and the car is empty, the vehicle number will be sent to the mobile station. makes a call. The base station receives this information, displays it, and issues a dispatch order from there.

(2) Distributed transmission method The business area will be divided as above. As shown in FIG. 1, sign posts a, b, etc. (small transmitters) are set at the center of each of the divided blocks A, B, etc. When vehicle 1 enters point _A1 from outside the business area,
Memorize the area A of the nearest sign post a, A ₂
Even if the area passes through the point, area A is maintained as it is. Next, when moving to point B in area B of another sign post b, the memory of the position group signal of the previous sign post a _is erased and the position group signal B of the new sign post b is stored. In this way, each time the vehicle 1 moves, the position group signals A, B, . . . of the nearest sign posts a, b, . . . are stored. When the vehicle leaves the service area, the position group signal will be erased at _point E after a certain period of time. After the position group signal is stored in the mobile station in this way, the operation is similar to the semi-automatic system, in which a dispatch command is issued. Note that in both the semi-automatic method and the distributed transmission method, position information is stored in the mobile station, and the corresponding vehicle returns its vehicle number in response to a region-designated polling signal from the base station.

(3) Distributed reception method The business area is divided into blocks A, B, etc. as in the methods (1) and (2) above. A distributed receiver for collecting vehicle number information is placed at the center of each block A, B, etc., and this distributed receiver and a base station are connected by a dedicated circuit. Since the mobile station issues a car number signal when the car is empty, this signal is received by a nearby distributed receiver, and the car number information is sent by wire to the base station. In this way, data on the location and vehicle number of the mobile station is collected. Vehicle dispatch commands are the same as methods (1) and (2) above.

Next, time slots during polling will be explained based on FIG. 2.

When polling is performed by specifying the relevant area, empty vehicles within the relevant area will return their vehicle numbers, but there are multiple vehicles in that area. If these respond all at once, signal collision will occur, and the base station will not be able to obtain correct information. As a countermeasure to this problem, as shown in Fig. 2, after the polling signal is sent, each vehicle is sequentially assigned a unique response time _t0 ~ ₁ , _t1 ~ ₂ ,... to prevent collisions caused by simultaneous calls. .

``Problem to be solved by the invention'' Among the three methods mentioned above, especially in the case of taxis, it is necessary to collect dynamic data within a predetermined area by polling before issuing a dispatch order. Because it takes several seconds, there were problems such as delays in dispatching dispatch orders and errors in polling operations during times of congestion.

The purpose of the present invention is to obtain a device that, when dynamic data has passed for a certain period of time or more, searches for and polls the area or group to refresh the data and promptly issue a dispatch order. do.

"Means for Solving the Problem" The present invention transmits a polling signal from a base station to a mobile station, receives response signals from mobile stations within a predetermined area at the base station, and collects dynamic data of the mobile station. A vehicle dynamic display device that collects data and displays it on a display device includes a receiver that detects the call status of a mobile station, and a receiver that is coupled to the receiver and transmitter to detect when the call status of the base station and mobile station has completely disappeared. call detection timer means for detecting whether the dynamic data display request is received and there is no such call, instructing the selection means to scan whether or not the dynamic data in the main memory means is new; Instructing means for instructing mobile stations in each region or group to poll for dynamic data collection when an output indicating that there is no new dynamic data, and for storing the data for a certain period of time simultaneously with the dynamic data at the time of polling. main memory means, timer means for subtracting elapsed time from time data among the data stored in the main memory means, and a timer means for subtracting elapsed time from time data among data stored in the main memory means; selection means for first determining whether or not the time data paired with the dynamic data in the main memory means is new data that has not passed a certain period of time, and outputting only the new dynamic data; a counter means for counting the number of dynamic data, a limiter means for determining whether the number of dynamic data counted by the counter means is equal to or more than a predetermined certain value, and according to an instruction from the instruction means, or a transmitter that transmits a polling signal to the mobile station based on the output of the limiter means when a dynamic data display request command is received and the number of new dynamic data is below a certain level; This is a vehicle dynamic display device.

"Operation" Sends a polling signal to collect vehicle dynamic data. When storing the obtained data,
Time data of the dynamic data is also stored at the same time. When the next polling command is issued, the memory contents are checked before sending the polling signal. If the stored data is new data within a certain period of time and the number of data is above a certain value, the stored dynamic data is adopted and displayed as is. Old data after a certain period of time,
Only when there is less than a certain number of new data (for example, three vehicles), only that area or group is searched and polled, and the data is displayed.
The new data is refreshed when both the base station and mobile station are not making calls.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

In FIG. 3 showing the base station, reference numeral 2 denotes a keyboard that is operated when requesting to display vehicle dynamic data, and this keyboard 2 is coupled to selection means 6.

Next, reference numeral 7 denotes a receiving antenna for receiving a signal from a mobile station, and this receiving antenna 7 is coupled to a receiver 8 which is coupled to a display device 9 as well as a main memory means 10. It is coupled to the selection means 6. This main memory means 10 has a pair of parts: a part for storing dynamic data input from the receiver 8, and a part for storing time data for a certain period of time (for example, 3 minutes). A timer means 11 is coupled to the input side of the main memory means 10 for subtracting time data of a certain period of time from the main memory means 10. Then, the time data stored in the main memory means 10 is read by the timer means 11 (for example, every minute, 3→2→
It is subtracted from 1 to 0. The selection means 6 is coupled with a counter 12 that counts only the number of new data collected, and a temporary memory means 13 that temporarily stores the contents of the new dynamic data collected. The counter means 12
is the limiter means 1 which outputs according to the number of data.
4, the limiter means 14 being coupled to the coding means 3 and the gate means 15.
The gate means 15 is coupled to the display device 9, such as a CRT.

The coding means 3 is coupled to a transmitting antenna 5 via a transmitter 4, and a call detection timer means 16 is coupled to the output sides of the transmitter 4 and the receiver 8, and the call detection timer means 16 is connected to an indicating means. 17
It is coupled to the selection means 6 via. The instruction means 17 scans the memory contents of the main memory means 10 and instructs polling when there is no new dynamic data in the main memory means 10.

Next, the operation of the above configuration will be explained with reference to the flowchart of FIG.

(1) When there is a dynamic data display request command from the keyboard 2, "Data display request?" becomes "YES".

(2) If "YES", is the data in the main memory means 10 within the destination area and new? ”, that is, the selection means 6 from among the dynamic data group stored in the main memory means 10.
At the same time, it is determined whether the time data paired with these dynamic data is new (within 3 minutes). To explain this selection determination operation in more detail, each time polling is performed, the dynamic data of each vehicle is stored in the main memory means 10 via the receiving antenna 7 and receiver 8. At this time, at the same time as the dynamic data is input, certain time data (for example, 3 minutes) is also added and stored in the main memory means 10 at the same time. In this way, the main memory means 10
At the same time as the dynamic data, time data is added to the collection time of the data and stored therein, and the timer means 11 subtracts the time data every minute, for example, every minute. Then, when a display request command is issued from the keyboard 2, the selection means 6 determines whether the dynamic data within the destination area and the time data are for a certain period of time (for example, within 3 minutes). If the time data of the dynamic data is not new (more than 3 minutes have passed), NO will be returned.
Note that if the selection means 6 does not import dynamic data for which a certain period of time (for example, 3 minutes) has elapsed, it is determined that there is a high possibility that the vehicle is already in an actual vehicle state or has moved to another area. Because it does.

If the dynamic data determined by the selection means 6 is within the destination area and the time data is within 3 minutes, "Is the data in the main memory means 10 within the destination area and new?" is "YES". '', and the content of the dynamic data is stored in the temporary storage memory means 13, and at the same time, the counter means 12 counts the number of inputs of the corresponding dynamic data.

(3) The number of data sent from the selection means 6 is counted by the counter means 12, and the limiter means 14 determines whether the number of new dynamic data is a certain number (for example, three devices) or more, number (3
If the number is greater than 1), the answer is "YES".

(4) If "YES", the gate means 15 is opened by the output from the limiter means 14 and the contents of the temporary memory means 13 are displayed on the display device 9, and the process returns to the original state.

(5) In either case, if there are no cars with new data in the target area, or if there are cars with new data in the target area but the number of new dynamic data is below a certain level, the limiter will be applied. Means 14
Since the output appears from 1 to 3 to the coding means 3, it is encoded by the coding means 3 and transmitted to the transmitter 4.
and transmits a polling signal from the transmitting antenna 5.

(6) Data is transmitted from the mobile station in response to this polling signal, and dynamic data from the corresponding vehicle is collected by the receiver 8 via the receiving antenna 7.

(7) The collected dynamic data is stored in the main memory means 10 together with the time data, and the data is displayed as is on the display device 9.

(8) Next, unless a request is made to display the vehicle dynamic data using the keyboard 2, the circuit will not operate, and the "Data display request?" will be "NO".

(9) When “Is there a data display request?” is “NO”, “Is there a call?” is determined, and if a call is in progress between the base station and mobile station by the microphone, it is output to the receiver 8. will appear, it will say "YES", and it will return to normal.

(10) If the "Are there any calls?" returns "NO" because there is no call in progress, the call waits for a certain period of time (for example, 10
seconds) has passed? ” is the call detection timer means 16
It is determined by

(11) If "Has a certain period of time (10 seconds) passed?" is "NO", return to the original state and wait for a certain period of time (10 seconds)
Wait until the time elapses.

(12) When "Has a certain period of time (10 seconds) elapsed?" becomes "YES", the call detection timer means 16 outputs an output, and the instruction means 17 sequentially scans each area and stores the next "main memory". Is the data in the means 10 new?" is determined by the selection means 6.

(13) If the data in the relevant area in the main memory means 10 is old (3 minutes have passed), "NO" will be displayed, and an output will appear from the main memory means 10 indicating that there is no new dynamic data. Then, according to the instruction from the instruction means 17, the transmitter 4 is activated via the coating means 3, and a polling signal is transmitted from the transmitting antenna 5.

(14) Data is transmitted from the mobile station in response to this polling signal, and dynamic data from the corresponding vehicle is collected by the receiver 8 via the receiving antenna 7.

(15) The collected dynamic data is stored in the main memory means 10 together with its time data, and the data is displayed on the display device 9 as necessary.

(16) When dynamic data is stored in the main memory means 10, or when "Is the data in the main memory means 10 new?" is "YES", that is,
When the dynamic data is new (for example, within 3 minutes), it becomes "YES", prepares for polling of the next district, and returns to the previous state.

In the above embodiment, vehicle dynamics are displayed by polling by district, but the present invention is not limited to this. Vehicles may be divided into groups, and vehicle dynamics may be displayed by polling for each group. It can also be used in cases.

"Effects of the Invention" As described above, the present invention is configured to perform polling based on whether the data stored in the main memory means in the base station is new and whether the number of data is above a certain level. All you have to do is read the data in memory. Additionally, when the data becomes outdated, the mobile station is automatically polled during idle time to replace new data. In this way, since polling is performed automatically during idle times and the dynamic data in the main memory means is always new, it is sufficient to check the contents of the main memory means when there is a request for dispatch, and this is effective. Vehicle dispatch is possible. Incidentally, conventional polling requires 6 to 10 seconds, but in the present invention, the polling time was 0.1 seconds or less.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the vehicle status when the business area is divided into multiple blocks, Fig. 2 is an explanatory diagram of time slots during polling, and Fig. 3 is an embodiment of the vehicle dynamic display device according to the present invention. block diagram,
Figure 4 is a flowchart. DESCRIPTION OF SYMBOLS 1... Vehicle (mobile station), 2... Keyboard, 3... Coding means, 4... Transmitter, 5... Transmitting antenna, 6... Selection means, 7... Receiving antenna, 8... Receiver, 9... Display device, 10... Main memory means, 11...
Timer means, 12... Counter means, 13... Temporary memory means, 14... Limiter means, 15... Gate means, 16... Call detection timer means, 17... Instruction means.

Claims (1)

[Claims] 1. A base station transmits a polling signal to a mobile station, the base station receives response signals from mobile stations within a predetermined area, collects dynamic data of the mobile station, and displays the data on a display device. The vehicle dynamic display device includes a receiver that detects the call status of a mobile station, and a call detection unit that is coupled to the receiver and transmitter and detects when the call status of the base station and the mobile station has completely disappeared. a timer means; and when there is no dynamic data display request command and there is no relevant call, instructs the selection means to scan whether the dynamic data in the main memory means is new, and when there is no new dynamic data from the selection means. an instructing means for instructing mobile stations in each region or group to poll for dynamic data collection when an output is received; a main memory means for storing the data for a certain period of time simultaneously with the dynamic data at the time of polling; a timer means for subtracting elapsed time from time data among data stored in the main memory means; and a timer means for subtracting elapsed time from time data among data stored in the main memory means; a selection means for determining whether or not time data paired with the dynamic data of is new for which a certain period of time has not elapsed and outputting only new dynamic data; and a selection means for determining the number of new dynamic data output from the selection means. a counter means for counting, a limiter means for determining whether the number of dynamic data counted by the counter means is equal to or greater than a preset certain value, and a command to display dynamic data according to an instruction from the instruction means a transmitter that transmits a polling signal to a mobile station according to the output of the limiter means when the number of new dynamic data is below a certain level.