CN111739331A

CN111739331A - Bus stop announcement device

Info

Publication number: CN111739331A
Application number: CN202010581252.3A
Authority: CN
Inventors: 龙青云
Original assignee: Guangdong University of Petrochemical Technology
Current assignee: Guangdong University of Petrochemical Technology
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-10-02

Abstract

The invention discloses a bus stop reporting device, which comprises: the system comprises a singlechip main control module circuit, a key circuit, a voice circuit, a liquid crystal circuit and a GPS circuit; the key circuit, the voice circuit, the liquid crystal circuit and the GPS circuit are all connected with the singlechip main control module circuit; the singlechip main control module circuit comprises a singlechip, a crystal oscillator circuit and a reset circuit; the reset circuit and the crystal oscillator circuit are connected with the single chip microcomputer. The invention can automatically report the bus stop in time, accurately and clearly after the bus arrives, effectively solves the problem of instability of manual stop reporting, saves the human resource cost and the carriage space resource, improves the riding experience of customers, and is convenient for operation managers of the bus to operate conveniently and concisely and for urban builders to popularize the cities. The invention can automatically report the bus stop after the bus arrives, effectively solves the problem that the common voice stop reporter needs the driver to scatter attention to manually operate and press the voice buttons for entering and exiting the bus stop, and improves the safety guarantee of passengers.

Description

Bus stop announcement device

Technical Field

The invention relates to the technical field of electric power, in particular to a bus stop announcement device.

Background

In recent years, the economy of China is continuously developed, a large amount of rural population is flushed into cities, but the increase of the urban population brings great inconvenience in urban traffic, the congestion of urban roads caused by going to and from work seems to be common, and the increase of private vehicles causes pollution to the environment air of the cities to a certain extent. Today, when green and healthy life is advocated, urban traffic and environment become more of a concern and a solution to our needs. Urban public transport becomes a solution for residents to effectively deal with urban pressure, and buses are important tools for healthy and green travel of urban residents. Convenience, rapidness and economy are the first impression provided by the bus for urban residents, but the bus industry is used as a service industry, and the bus taking experience of passengers is also the problem to be considered by the bus. After all, the passenger can be better attracted to ride the vehicle only with excellent service quality, and the pressure of urban traffic is reduced to a greater extent.

The bus stop announcement problem is that a traditional method is that each bus is provided with a special bus attendant to announce the stop, but a manual mode is adopted, the sound of the attendant cannot cover the whole bus, especially when more passengers are on the bus, people are noisy, a large amount of noisy sound easily influences the information of the passengers listening to the stop, the bus stop announcement problem usually has higher working pressure on the staff on the bus, and a large amount of human resource cost is needed, and the limited space resources of the carriage are occupied.

At present, the history of adopting the crew to report the bus stop is far away, and most buses adopt a voice bus stop reporter which is manually pressed by a driver to report the bus stop. A typical voice announcer generally operates by: the driver respectively presses the voice buttons of entering the bus and leaving the bus before the bus arrives at the bus station and after the bus goes out of the bus station, and the voice module can play corresponding voice prompt tones to remind passengers whether to get on the bus or not. Each station stores the voice information into the system in advance according to the driving sequence. The set of the station reporter system has the advantages that a driver needs to manually operate the system, so that the driver needs to pay attention to the driving condition of the bus and also needs to pay attention to the operating system, the potential safety hazard problem in the bus driving process is increased, and the safety guarantee of passengers is reduced.

Disclosure of Invention

In order to solve the problems in the prior art, the embodiment of the invention provides a bus stop announcement device. The technical scheme is as follows:

on one hand, the bus stop announcement device comprises a singlechip main control module circuit, a key circuit, a voice circuit, a liquid crystal circuit and a GPS circuit;

the key circuit, the voice circuit, the liquid crystal circuit and the GPS circuit are all connected with the singlechip main control module circuit;

the singlechip main control module circuit comprises a singlechip, a crystal oscillator circuit and a reset circuit;

the reset circuit and the crystal oscillator circuit are connected with the single chip microcomputer.

Optionally, the single chip microcomputer adopts an STC89C52RC chip.

Optionally, the voice circuit is used for controlling recording and playback functions of bus station information and public service advertisement information, and the voice circuit adopts an ISD4004 voice chip; the voice circuit comprises a power amplifier, the power amplifier is used for enhancing power, and the power amplifier adopts an LM386 chip.

Optionally, the liquid crystal circuit adopts a liquid crystal display, the liquid crystal display is used for displaying information or warm prompts of all stations of the bus, and the type of the liquid crystal display is LCD 12864.

Optionally, the key circuit comprises four independent keys, and the four independent keys are respectively used for recording, playing, inputting of GPS positioning information and switching control of the bus round trip.

Optionally, the GPS circuit is used to determine a specific location of the bus.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the bus stop reporting device provided by the invention utilizes an STC89C54 single chip microcomputer as a core control center to control a GPS to position a bus, an LCD12864 liquid crystal display displays stop information, and an ISD4004 broadcasts voice information. The voice chip, the LCD display screen and the GPS are connected with each other through the singlechip. Through the information that contrast GPS received, voice module can report corresponding website information or warm suggestion automatically. The recording and playing functions can be realized through the key prompt. The liquid crystal display screen enables each passenger to clearly know the current station, so that the passenger is prevented from missing the destination station, and the riding experience enjoyment of the passenger is increased. The voice station reporter adopts a GPS to determine the specific position of a bus, and when a station arrives, the system can automatically report the station information to passengers by voice.

The invention adopts the singlechip and the GPS to achieve the functions of automatic identification and automatic stop reporting with very high accuracy, thereby realizing the intellectualization of bus stop reporting. The system can automatically report the bus stop in time, accurately and clearly after the bus arrives, effectively solves the problem of instability of manual stop reporting, saves human resource cost and carriage space resources, improves riding experience of customers, and is convenient for operation managers of the bus to conveniently and succinctly operate and popularize the city by builders. In addition, the invention is completed based on the single chip microcomputer, has simple structure, high station reporting accuracy, low price, stable system working performance and large development space, and is convenient to be put into the market.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a bus stop announcement device according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of a main control module of a single chip microcomputer according to an embodiment of the present invention;

FIG. 3 is a pin diagram of a single chip microcomputer according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a voice circuit of an embodiment of the present invention;

FIG. 5 is a pin diagram of an ISD4004 chip according to an embodiment of the present invention;

FIG. 6 is a system diagram of the SPI component of an embodiment of the present invention;

fig. 7 is a schematic diagram of a liquid crystal circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The invention provides a bus stop announcement device, which is shown in figure 1 and comprises a singlechip main control module circuit 100, a key circuit 200, a voice circuit 300, a liquid crystal circuit 400 and a GPS circuit 500;

the key circuit 200, the voice circuit 300, the liquid crystal circuit 400 and the GPS circuit 500 are all connected with the singlechip main control module circuit 100;

the single chip microcomputer main control module circuit 100 comprises a single chip microcomputer, a crystal oscillator circuit and a reset circuit;

Specifically, referring to fig. 2, the single chip microcomputer main control module 100 is composed of an STC89C54 chip and a crystal oscillator reset. The reset and crystal oscillator circuit is connected with a pin of the single chip microcomputer through an interface, the reset circuit is connected to the RST port, and the crystal oscillator is connected to the XTAL1 port and the XTAL2 port.

Optionally, the single chip microcomputer adopts an STC89C52RC chip.

As is known, the 51-series single chip microcomputer is the most widely applied single chip microcomputer in the cash stage and is also the single chip microcomputer most suitable for beginners to use, and the 51-series single chip microcomputer has the characteristics of high stability, low power consumption, strong performance and the like, and the size of a program memory can be selected according to different types of the single chip microcomputers. The chip selected by the invention is an STC89C54 chip. The single chip microcomputer is known from the model:

1. the COMS circuit represented by 'C' has an operating voltage of 5.5V-3.8V. 'S' denotes a memory with a flash function.

2. 5X: denoted 5 is a 51 core, and X is divided into memory space sizes denoted 1, 2, 3, 4, … …. 51 is 4K, 52 is 8K, 53 is 15K, 54 is 16K and so on.

The STC89C54 singlechip is adopted because the program occupies a larger memory space because of more hardware modules. Therefore, the space requirement of the program cannot be met by selecting the 52 type single chip microcomputer, and the 52 type single chip microcomputer is not different from the 54 type single chip microcomputer in function, but is different from the memory.

The STC single chip microcomputer and the 51-series single chip microcomputer of the AT can be commonly used in the aspect of operation instructions, but the difference between the STC single chip microcomputer and the AT single chip microcomputer is as follows:

1. AT89C51 downloads without an ISP (in-system programming) and must use a dedicated downloader for this purpose. And the serial port conversion software used by the STC can be downloaded on most websites.

2. The instruction execution speed of the STC singlechip is a characteristic of the STC singlechip, and is about 3-30 times of that of a singlechip of ATMEL company, so that a program debugged on the ATMEL can not meet the expected requirement on STC, the accurate delay without using a timer for control can be influenced in different types of singlechips produced by two different companies due to the acceleration of the STC execution speed, the problem in the aspect of considering the delay is a detail which is specially noted when an AT chip and an STC chip are used, and the use of the delay program of the two chips needs special care because the processing speed of the STC chip is higher than that of the AT chip.

3. For an STC single chip microcomputer, the requirement on the operating environment is lower. The normal working voltage is 5V, however, when an emergency occurs and the voltage of the operating environment is between 3V and 5V, the STC chip can still normally operate, however, under such a relatively severe operating environment, another chip cannot normally operate without fail, so that when the application system can operate in the chip but cannot normally operate when being placed in the single chip microcomputer of ATMEL, it can be suggested to directly check whether the power supply of the minimum system is normal.

Specifically, referring to fig. 3, the pin function of the single chip is described as follows:

(1) p0 is a bi-directional I/O port, and each interface can drive 8 TTL levels. One important function of the port P0 is to be multiplexed as the lower 8-bit address/data when accessing external programs or data. In the present embodiment, the port P0 is connected to a 12864 display screen, and a pull-up resistor is used at the port P0 during the connection of the LCD 12864.

(2) In the embodiment, the port P2 is used for accessing the ISD4004 voice chip, and the ports P1 and P2 seem to have the same functions and can be used synchronously, but the ports P1 and P2 are used differently in some places. First, both P1 and P2 have 8-bit bidirectional I/O ports with internal pull-up resistors and can also carry multiple TTL logic potentials, but one of the most prominent functions of the P1 port is to be used as the counting input and trigger input of a timer/counter, and to accept the lower 8-bit address byte during program verification. The main function of the port P2 is to send out the upper 8-bit address bytes when accessing the external memory, and to send out the lower 8-bit address bytes together with the lower 8-bit address bytes sent out from the port P0 when accessing the external data memory with 16 bits.

(3) The port P3 is often used as a second function, in this embodiment, the port P3 access is a system operation key module and a GPS module.

Introduction of a pin of a single chip microcomputer:

p0: in the embodiment, the pins P0^0 to P0^7 are respectively connected with the pins D0 to D7 of the LCD12864, and the display screen can normally work only if a pull-up resistor is added in the use process of the port P0. The reason why the pull-up resistor is used is that:

1. when the COMS circuit is driven by the TTL circuit, if the values of the high levels output by the TTL circuit and the COMS circuit are different, the value of the high level of the TTL circuit is increased, and a pull-up resistor needs to be added into the TTL circuit.

2. The single chip microcomputer contains a CMOS chip, a pull-up resistor is generally connected, and a channel for leaking charges is provided in order to reduce the impedance of input electricity. In order to prevent the generation of static electricity in the using process and cause unnecessary damage to the single chip microcomputer, and unused pins cannot be suspended. Because the pins are suspended, the pins may be interfered by electromagnetic waves in the external environment.

P1 in this embodiment, pins P1^0-P1^4 are respectively connected with five LED lamps, which indicate five stations, and when the bus arrives at a station, the LED lamps will light up and the LED lamp of the next station will flash.

P2: in the present embodiment, the P2 interface is accessed to the ISD4004 voice module, wherein P2^0-P2^4 are respectively accessed to MISO, MOSI, SS, INT and SCLK in the ISD, and these pins respectively indicate what names will be explained in the introduction of the ISD4004 chip.

P2^6 connects RS port of LCD12864, and represents the selection input of register. P2^7 connects EN port of LCD12864 to show the control of the liquid crystal enable.

P3: in the embodiment, P3^0 and P3^1 access the input interface and the output interface of the GPS respectively.

P3^4-P3^7 are respectively accessed to the key modules K1, K2, K3 and K4;

and X1 and X2 are respectively connected with the crystal oscillator part of the system.

Optionally, referring to fig. 4, the voice circuit is used for controlling recording and playback functions of bus station information and public service advertisement information, and the voice circuit adopts an ISD4004 voice chip; the voice circuit comprises a power amplifier, the power amplifier is used for enhancing power, and the power amplifier adopts an LM386 chip.

Specifically, the voice chip with the SPI interface has the advantages of long-lasting recording and playing, good sound, no need for analog/digital conversion during recording and playing, capability of repeatedly recording for ten thousand times, capability of storing data for over one hundred years after power failure, and the like, and is widely applied to electronic products such as mobile phone terminals, recording pens, and the like, and industrial control environments and traffic management departments which need voice prompt.

Specifically, referring to fig. 5, the ISD4004 pin is illustrated as follows:

VCCA, VCCD: and 3V of power supply.

VSSA, VSSD: analog circuits and digital circuits require the use of different bottom lines, respectively.

ANA IN +: and a port for inputting the recording signal in the same direction. The input amplifier may be driven with one port or differentially.

ANA IN-: when the differential drive is performed, the ports of the recording signals are input in opposite directions.

AUD OUT: a 5 kilo-ohm load can be placed on the audio output.

And SS: and (5) selecting the fragments. The precondition for the ISD4004 chip to accept data is that the chip select segment is set low by the controller.

MOSI: this terminal is the serial input used by ISD4004 and data should be stored on the serial input during the half cycle of the rising part of the full clock cycle.

MISO: in the unselected state of the voice chip, this port exhibits a high resistance state.

SCLK: a clock input terminal. SCLK is generated by the core control element for keeping the transmission data transmission of the serial input and the serial output at the same time. Data stored in the ISD through the clock input needs to be stored at the rising edge, and at the falling edge, the data will be removed.

INT: the current terminal is the interrupt output, and the drain is open. INT goes low in the presence of EOM or OVF.

RAC: the row address clock, the drain open output. Each RAC cycle represents one row operation of the ISD memory. In the normal mode, the RAC cycle time is 200 ms, the signal remains high 90% of the time, and the time in the low state is only 10%. In the fast forward mode, the period time of the RAC is 250 microseconds, with 80% of the time remaining high and 20% of the time remaining low. The RAC end can also apply the reserve control technology.

XCLK: an external clock input terminal. In the case where the port is not in use, the port must be grounded.

AMCAP: and an automatic quiet noise control end. When the automatic squelch control is connected to the VCCA power supply, the squelch function will not work properly.

Specifically, referring to fig. 6, see table 1, SPI is a released parallel serial complementary socket. The interface includes: the chip select signal terminal SS, the controller clock input terminal SCLK, the MOSI data line input by the main controller output/auxiliary controller, and the MISO data line with the reverse function. SCLK is generated by the core control element for keeping the transmission data transmission of the serial input and the serial output at the same time.

The operation flow of the voice module for transmitting data is as follows:

(1) when SS is set low, serial data transmission is started at this time. During the transmission of data, the port must be kept low, whereas the interval between the transmission of the previous and the next command is kept high.

(2) At the host clock rising edge, data is imported at this point. At the host falling edge, data is shifted out.

(3) When the chip select end is set at low level, the corresponding instruction and address data are imported, and the voice module can start normal recording/playback work. Standard instruction format requirements are (eight bit code, convertible to 16) plus (sixteen bit address code) or only eight bit code, plus no address code.

(4) When the state of EOM or OVF appears, the system will jump out an interrupt signal, and the interrupt signal will be removed after a new SPI cycle begins.

(5) All the operation procedures are executed from the rising edge of the chip selection end.

ISD4004 instruction opcode:

TABLE 1 operation instruction code

Specifically, referring to fig. 7, the LCD12864 is a dot matrix graphic LCD module, the resolution is 128 × 64, and there are many interface ways, which can be connected to 4, 8 bits in parallel or 2 lines, 3 lines in series. Moreover, the LCD can provide 8000 more 16 × 16 simplified and optional lattice characters and 128 16 × 8 lattice characters, which can meet the display requirements of the present embodiment. Meanwhile, the built-in 2MHZ clock frequency is lower in power consumption than other liquid crystal display screens of the same type, the liquid crystal display screens stably work at 0-55 ℃, and the price is lower than that of a display module with the same function and the same display effect.

LCD12864 pin introduction:

VSS is power supply negative and grounding;

VCC is positive;

v0, the brightness and the definition of the screen can be adjusted;

and RS, when the RS is in high level, the three-state data line is display data.

When the RS is in low level, the tri-state data line is command data.

R/W is a read/write selection signal terminal.

When R/W is high and E is high, data is read into DB7-DB0

When R/W is low, E changes from high to low, and data is written into ID or IR.

E, enabling end;

DB0-DB7 tri-state data lines;

NC, the pin is empty;

RESET is a RESET port, and is set to be 0;

VOUT is the driving voltage output end.

Specifically, K1-K4, four independent keys, are used. Pressing the key K1 changes the recording mode, pressing the independent key K3 for the first time, then playing the information corresponding to the corresponding site, and processing the corresponding display program, thereby displaying the corresponding information on the LCD screen. And pressing the key K3 for the second time correspondingly plays the second station information, displaying the information on the liquid crystal screen, and repeating the steps until the key K3 is pressed for the first five times to play the five station information recorded in advance. Pressing the K3 key for the sixth/seventh time, the warm prompt arrival information is played. The K2 is a recording function button, and if the K2 button is pressed for a long time without moving, the voice information will be recorded and replaced by the voice information contained in the current address. When the button K1 is pressed again, the recording of the next voice message is started. After the recording is finished, the K3 key can be pressed to listen to the recording effect. And after a K4 key is pressed, entering a longitude and latitude setting mode, when a required site is reached, pressing a K3 key to store the longitude and latitude, sequentially operating for five times, and recording information of five sites. If the longitude and latitude need to be changed, the key K3 is pressed again.

Specifically, the GPS signal receiver is a user part that can be held by ordinary citizens, and the receiver can receive data transmitted from the nearest satellite and perform tracking of the satellite data. After receiving data from the satellite, the embedded processor in the signal receiver can calculate the information of the position of the user according to a certain calculation method. The user equipment part of the GPS comprises a hardware receiver of the GPS, and the software part comprises a data calculation processing chip. The antenna and receiving two-part module form the main module of the receiver. Most receivers currently have two power supplies, one is the power supply inside the receiver, and the other is the external power supply. The external power supply is mainly used for providing the normal work of the GPS and normally receiving data. The main purpose of the internal power supply is to provide certain power supply help to ensure the cruising ability of the GPS under the condition that the GPS lacks an external power supply, and the other purpose is to charge the RAM under the power-off condition to ensure the non-loss property of data.

The invention can automatically report the bus stop in time, accurately and clearly after the bus arrives, effectively solves the problem of instability of manual stop reporting, saves the human resource cost and the carriage space resource, improves the riding experience of customers, and is convenient for operation managers of the bus to operate conveniently and concisely and for urban builders to popularize the cities. The invention can automatically report the bus stop after the bus arrives, effectively solves the problem that the common voice stop reporter needs the driver to scatter attention to manually operate and press the voice buttons for entering and exiting the bus, reduces the potential safety hazard problem in the driving process of the bus, and improves the safety guarantee of passengers.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bus stop announcement device is characterized by comprising: the system comprises a singlechip main control module circuit, a key circuit, a voice circuit, a liquid crystal circuit and a GPS circuit;

2. The bus stop announcement device of claim 1, wherein the single chip microcomputer is an STC89C52RC chip.

3. The bus stop announcement device of claim 1, wherein the voice circuit is used for controlling the recording and playback functions of bus stop information and public service advertisement information, and the voice circuit adopts an ISD4004 voice chip; the voice circuit comprises a power amplifier, the power amplifier is used for enhancing power, and the power amplifier adopts an LM386 chip.

4. The bus stop announcement device of claim 1, wherein the liquid crystal circuit is a liquid crystal display, the liquid crystal display is used for displaying information or warm prompts of each stop of the bus, and the liquid crystal display is of a type of LCD 12864.

5. The bus stop announcement device of claim 1, wherein the key circuit comprises four independent keys, and the four independent keys are respectively used for recording, playing, inputting of GPS positioning information and switching control of bus return.

6. The bus stop announcement device of claim 1 wherein the GPS circuit is configured to determine a specific location of a bus.