CN2588454Y

CN2588454Y - Palm type public traffic bus-taking guide

Info

Publication number: CN2588454Y
Application number: CN 02260290
Authority: CN
Inventors: 薛慧丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-26
Filing date: 2002-09-26
Publication date: 2003-11-26
Anticipated expiration: 2012-09-26

Abstract

The utility model relates to a palm type public traffic electronic bus guiding device which is a palm device which is composed of an embedded system which is composed of an embedded CPU, a memory, an input device, an output device and a communication interface. The embedded CPU executes programs in the memory. The embedded CPU obtains an optimal public traffic route, bus stations for transferring, and the relative positions of the bus stations and each route which are required by an enquiry person according to an enquiry command inputted by the enquiry person from the input device and public traffic information stored in the memory. An enquiry result is outputted on the output device.

Description

Hand held public transport electronics bus-taking guide

Affiliated technical field

The utility model relates to a kind of hand-held device that riding route and transfer station can be provided for the passenger.Belong to transport information and embedded system field.

Background technology

At present, urban public tranlport system becomes increasingly complex, and when people go on a journey need take pubic transport system the time, mainly determines riding route and transfer station with following way.One, consults urban transportation figure, two, to relevant query site.First method exist inquiry velocity slow, be difficult for the variation of public transportation system shortcoming such as renewal, there be the computing machine, the expense height that need networking in second method, carry shortcoming such as inconvenience.

Summary of the invention

High and carry deficiency such as inconvenience in order to overcome existing public transport taking guide method speed computing machine, expense slow, that be difficult for upgrading, needing networking, the utility model utilizes embedded system technology and proposes a kind of hand held public transport electronics bus-taking guide.This device can be rapidly and accurately for the passenger provides riding route and transfer station, and volume is little, easy to carry.After public transportation system changes, can also upgrade this device by the Bus information that upgrades its storage.

The technical scheme that its technical matters that solves the utility model adopts is:

By the embedded type CPU that is used for process information, be used for stored program program storage, be used for the data-carrier store RAM of stored data, the storer FLASHPEROM that is used to store each route information of public transportation system, the input equipment that is used for the input inquiry order, the communication interface that is used to show the output device LCD of Query Result and is used to carry out communication interconnect by address bus, data bus, control bus and interface circuit, forms an embedded system.

The public transportation system that has some cities in the FLASH of this system PEROM for information about.During inquiry, the operator imports city, starting point, the station name or the street number of terminal point and ride optimum index and the qualifications that will inquire about, and is minimum as number of transfer, expense is minimum, available monthly ticket etc.CPU tries to achieve best riding route and transfer station according to the querying condition of public traffic information among the FLASHPEROM and input, then Query Result is exported on LCD, and can be shown the position of these each routes of station.

Public transit system is more stable, but also has some adjustment.After public transit system was adjusted, the transport information after the user can also will upgrade by the communication interface of this device stored among the FLASH PEROM, thereby finishes information updating.

The beneficial effects of the utility model are can be rapidly and accurately for the passenger provides riding route and transfer station, and volume is little, easy to carry.When public transportation system changes, can also realize the renewal of this device by upgrading the public traffic information of being stored.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is the circuit theory diagrams of embodiment.

Fig. 3 is the workflow diagram of embodiment.

Embodiment

In Fig. 1, CPU be used for controlling total system operation, the information of operator input is handled, RAM is used for the ephemeral data of canned data processing procedure, FLASH PEROM is used to store the control program of this device and the public traffic information in city, the input equipment keyboard is connected on the CPU by keyboard interface, is used for the input inquiry order.LCD is connected on the CPU by display interface device, is used for exporting Query Result.Communication interface is used for upgrading the public traffic information of storing among the FLASH PROM.

In the circuit theory diagrams of embodiment shown in Figure 2, adopt AT89C51 (U1) as master cpu.74F573 (U2) is used for latching the low eight bit address signals of AT89C51 output, to realize the time division multiplex of address/data.Program storage adopts 4Kbytes FLASH PEROM in the sheet and the 32KbytesFLASH PEROM AT29C256 (U5) that extends out.Data-carrier store RAM adopts 256Bytes RAM in the sheet and the 8Kbytes RAM 6264 (U3) that extends out.The FLASHPEROM AT29C040A (U4, U6) that is used to store urban public transport information also is addressed to data memory space.Because the storage space of every AT29C040A is 512Kbytes, two is 1Mbytes altogether, and the addressing space of the data-carrier store of AT89C51 is 64Kbytes, so control the Senior Three bit address line of two AT29C040A with P1.0, P1.1 and P1.2, with the gating of two AT29C040A of Combinational Logic Control of P1.3 and other signals.Thereby 1Mbytes is divided into size is 16 pages of 64Kbytes.LCM12232ZK (MO1) is a Chinese fonts lcd module, and it includes 8192 16 * 16 Chinese font, can show Chinese character, and can realize that the same screen of figure and literal shows.It realizes exchanges data by C mouth and the AT89C51 of 82C55A (U9) in the drawings.The read-write sequence of LCM12232ZK is realized (second function of these pins need not) by P3.2 (INT0), P3.3 (INT1), the P3.5 (T1) of AT89C51.KEYBOARD (K1) is 8 * 8 matrix keyboards, and AT89C51 scans it by A mouth and the B mouth of 82C55A (U9), to realize the data input.

Because the outer program storage addressing space of the sheet of AT89C51 is 64Kbytes, so except that making of P1.0, P1.1 and P1.2 the Senior Three bit address line of AT29C040A, also use P1.4, P1.5 and P1.6 chip selection signal as 6264, two AT29C040A and 82C55A, when outside the AT89C51 visit sheet during data-carrier store, these three lines have and have only an output low level, to realize address multiplex.

MAX232 (U10) is used to realize the conversion between Transistor-Transistor Logic level and the RS232 level, thereby makes embodiment that the RS232 serial communication interface externally is provided, so that the information of updated stored.

In AT29C040A, there are five partial informations:

1 bus routes through each station

2 each road public transport the station of process

The position relation of 3 main each circuit of transfer station

Optimum between the 4 any two circuits method of riding

The corresponding relation of 5 street number and bus stop

Wherein the 4th part is divided into by optimal conditions that number of transfer is minimum, the minimum two parts of expense, and each part is divided into monthly ticket again effectively and Monthly Ticket Invalid two parts.Wherein the 5th part is a series of numbers between certain two doorplate in street and the corresponding relation at a certain station.Corresponding as all doorplates between B number and C number of A street with the D station.These information are obtained and are stored in computing machine among the FLASH PEROM AT29C040A.

In the workflow diagram of this embodiment shown in Figure 3, this device is during work, the city, starting point station, terminal point station or street number and the optimal conditions that require the operator to import successively will to inquire about.This device is checked starting point, the terminal point of input, as finding input error, just requires to re-enter.

When the operator imports the station name, CPU determines whether to pass through simultaneously the public bus network at these two stations according to the part 1 information of being stored among the AT29C040A, if just have this circuit is exported as optimum line, if pass through not only one in the circuit at these two stations simultaneously, then in these several circuits, select that minimum circuit of passage in transit station number to export as optimum line according to part 2.If there is not public bus network to pass through starting point, terminal point station simultaneously, then will do combination through the circuit at these two stations respectively, each combination is wherein tried to achieve best method by bus by the 4th part, among these ride method, select the minimum method of number of transfer to export then as the best method of riding.And the output of the relative position (the 3rd part) of main each route of transfer station.

When the operator imported street number, CPU at first determined the pairing station of this number according to the 5th partial information of AT29C040A storage, and directly input station name is identical with processing for subsequent processes, exports Query Result at last.

Claims

1 one kinds of hand held public transport electronics bus-taking guides, comprise embedded type CPU, storer, input equipment, output device, data bus, address bus and control bus, it is characterized in that: the data pin of embedded type CPU is connected to data bus, the address pin of embedded type CPU is connected to address bus, embedded type CPU is to storer, the read-write sequence control pin of input equipment and output device is connected to control bus, the address pin of storer is connected to address bus, the data pin of storer is connected to data bus, the read-write sequence control pin of storer is connected to control bus, the data pin of input equipment is connected to data bus, the address pin of input equipment is connected to address bus, the sequential control pin of input equipment is connected to control bus, the data pin of output device is connected to data bus, the address pin of output device is connected to address bus, and the sequential control pin of output device is connected to control bus; Embedded type CPU is according to the querying command and the public traffic information that be stored in storer of inquiry from the input equipment input, program in the execute store, obtain the desired best public transit route of inquiry, transfer website and each route relative position, and on output device, export Query Result at these websites.