CN2543155Y - LED electronic bus stop signpole capable of indicaging position of vehicle - Google Patents

Abstract

A LED electronic bus stop board of the utility model mainly consists of a 89 C 52 single chip microcomputer, a shift register, a crystal triode driving circuit, a LED light band display part and a regulated power supply. The information of the vehicle sent by a monitoring center is processed through storing, converting and distributing by the single chip microcomputer, and then controls a plurality of shift registers connected in series and then parallel distributes the data to each data export bit of the shift register and drives the light band consisting of LED to display the whole course vehicle position information on the public transportation line and the information of the passing of the last bus through a driving circuit, which is convenient for the passenger to wait for the bus and provides important information on the choices of whether to wait for the bus continuously or convert to another line. The utility model drives the LED of the public transportation line number to emit light by direct current power source to provide great convenience for the passenger to find the public transportation stop.

Description

The LED electronic stop plate that shows vehicle position information

One, technical field

The utility model relates to a kind of electronic stop plate with light emitting diode (LED) demonstration vehicle position information, and the station board that is mainly used in the intelligent transportation system shows.

Two, background technology

Employing LED luminous point that existing LED electronic stop plate has shows the positional information of the indivedual websites of vehicle, and the employing LED light belt that has shows the vehicle sections positional information, and its shortcoming is that to supply with the passenger's that waits quantity of information few; In addition, all now LED electronic stop plates all do not have last bus information and light the function of public bus network number with LED, and waiting to the passenger makes troubles.Simultaneously, because the shift register output of LED electronic stop plate display circuit employing at present mostly is Transistor-Transistor Logic level, poor anti jamming capability.

It is few and do not have shortcomings such as last bus information and public bus network number that the utility model is supplied with the passenger's that waits quantity of information at existing LED electronic stop plate, adopt the LED light belt to demonstrate omnidistance vehicle position information, make things convenient for the passenger to make to continue the selection of waiting or changing to other circuit, increase the prompting of " last bus is crossed " simultaneously, stop that last bus has been left over and phenomenon that the passenger is also waiting.In addition, the utility model can also number be lighted public bus network with LED, provides convenience for the passenger seeks the station of waiting.

Three, summary of the invention

LED electronic stop plate of the present utility model is by the 89C52 single-chip microcomputer as intelligent control unit, shift register, the transistor driving circuit, LED light belt display part and stabilized voltage supply are formed, it is characterized in that: omnidistance vehicle position information is finished reception by the serial data receiving port RXD of 89C52 single-chip microcomputer, the delivery outlet T0 of 89C52 single-chip microcomputer links to each other with the corresponding SRCLK interface of a plurality of series connection CMOS shift register 74HC595 respectively with T1, to shift register input shift clock and data latch signal, under the control of these two signals, pass through the delivery outlet INT0 of 89C52 single-chip microcomputer, link to each other with the input port SER of CMOS shift register 74HC595, finish the serial input of display message to shift register, shift register through a plurality of series connection is assigned to each data carry-out bit port output with data parallel, and the light belt of forming by transistor driving circuit driving LED demonstrates the omnidistance vehicle position information of public bus network again.This novel output port that also can pass through shift register demonstrates " last bus is crossed " information with output level mode driving LED display circuit.Simultaneously, available luminous by the LED that driving circuit drives public bus network number through the filtered direct supply of electrochemical capacitor, show public bus network information.

The utility model demonstrates the omnidistance vehicle position information of public bus network by adopting the LED light belt, be very easy to the passenger, make it when waiting, can understand the circuit public transit vehicle situation of waiting, continue to wait or the selection of changing to other circuit provides necessary information making.The utility model has increased the luminous prompting of LED of " last bus is crossed ", especially conveniently takes the passenger of last bus, stops that last bus left over and phenomenon that the passenger is also waiting.The utility model has also increased the luminous demonstration of LED of public bus network number, makes the passenger when seeking the bus stop, and tens meters outer can both see line number at an easy rate.On circuit design, this novel employing CMOS shift register 74HC595 has improved the antijamming capability of circuit.

Four, description of drawings

Fig. 1 is a LED electronic stop plate theory diagram.

Fig. 2 is control of LED electronic stop plate and power unit electrical schematic diagram

Fig. 3 is a LED electronic stop plate shift register part electrical schematic diagram

Fig. 4 is a LED electronic stop plate line number display circuit electrical schematic diagram

Fig. 5 is that LED electronic stop plate light emitting diode drives electrical schematic diagram

Fig. 6 is that LED electronic stop plate light emitting diode drives the electrical schematic diagram sketch

Five, embodiment

Embodiment 1:

As shown in Figure 1, be the theory diagram of this LED electronic stop plate.The utility model mainly is made up of control module, shift register, driving circuit and luminous demonstration four parts.The GPS positional information that the public transit vehicle of runing receives is delivered to bus dispatching Surveillance center by the wireless data transmission mode of up direction, through in the mode of wireless data broadcasting the positional information of public transit vehicle is sent to the control module of LED electronic stop plate after the real time data processing again by down direction, the data that enter control module are through storage, conversion, after distribution waits and handles, serial exports shift register to, be assigned to each data carry-out bit after converting serial data to parallel data by shift register, the light belt of forming by the driving circuit driving LED demonstrates the omnidistance vehicle position information of public bus network at last.Figure 2 shows that control of the present utility model and power unit electrical schematic diagram, the utility model adopts 89C52 single-chip microcomputer U1 as intelligent control unit, finish the reception of vehicle position information by the serial data receiving port RXD of single-chip microcomputer U1, finish the output of LED display message by the parallel data delivery outlet INT0 (DSER) of single-chip microcomputer, by T0 (CLK) output shift clock, T1 (STB) output data latch signal, these three data delivery outlets are finished the transmission of LED display message to shift register jointly.Capacitor C 1, capacitor C 2 and crystal oscillator Q1 constitute oscillatory circuit, the clock source are provided for single-chip microcomputer U1 by X1 and X2 port.Resistance R 49 and electrochemical capacitor E4 constitute reset circuit, finish the electrification reset function of single-chip microcomputer U1 by RESET (RST) port.Exchange the 9V power supply through after the electric bridge B1 rectification of 2A, again by three terminal regulator V1 output+5V direct current ,+5V direct current is again after the filtering of electrochemical capacitor E2 and E3, for entire circuit provides direct supply VCC after electrochemical capacitor E1 filtering.As shown in Figure 2, through electrochemical capacitor E1 filtered power supply, can be luminous by the LED of NO+ and NO-port driver public bus network number, show public bus network information.Figure 3 shows that LED electronic stop plate shift register part electrical schematic diagram, this part is made up of 74HC595 shift register U2～U7, U2～U7 adopts connected in series, its principle of work is: when the RCLK of shift register U2～U7 (STB) port is high level, shift register is in the data shift state, by data-in port SER (DSER) the input video data of shift register U2.SRCLK (CLK) port input shift clock by shift register U2～U7, each rising edge of SRCLK (CLK), input one digit number certificate, simultaneously former input data are moved to next bit, be O0 → O1 of U2, O1 → O2 ..., O6 → O7, send into the data-in port SER of U3 through the Q7 (identical) of U2 with the data of O7, O0 → O1 of U3, O1 → O2 ... O6 → O7, the Q7 (identical with the data of O7) of process U3 sends into the data-in port SER of U4 ..., up to the O2 that sends into U7.After one group of data had been imported, by RCLK (STB) the port input data latch signal of shift register U2～U7, low level was effective.Realization is assigned to each data carry-out bit with the serial data of single-chip microcomputer 89C52 output by shift register is parallel, R1, and R2 ..., R21; G1, G2 ..., G21; The light belt of forming by transistor driving circuit driving LED demonstrates the omnidistance vehicle position information of public bus network again.Last bit data O2 of shift register U7 output is the LAST signal, and it is luminous by transistor driving circuit driving LED, shows " last bus is crossed " information.Figure 5 shows that light emitting diode of the present utility model drives electrical schematic diagram, wherein N1 to N42 is a transistor 8050, and they receive the data R1 of shift register output, R2 ..., R21; G1, G2 ..., G21; The drive current that provides LED to show, the light belt that driven for emitting lights diode L1～L21 forms is luminous, demonstrates the omnidistance vehicle position information of public bus network.Its principle of work is: when the data of shift register input transistors base stage are high level, transistor is in conducting state, power supply VCC process resistance and transistorized collector provide LED the drive current of demonstration to the path of emitter, and the driven for emitting lights diode is luminous; When data were low level, transistor was in cut-off state, its emitter no current output, and light emitting diode is in not luminance.Resistance R 1～R42 in the circuit is a current-limiting resistance, plays protection LED.

As shown in Figure 5, link to each other by resistance R 43 between O2 (LAST) signal output part of the base stage of transistor N43 and shift register U7, receive " last bus is crossed " display message of shift register U7 output.When the O2 of shift register U7 (LAST) signal output part is high level, be that transistor N43 base stage is when being high level, transistor N43 is in conducting state, power supply VCC is through light emitting diode, resistance and the transistorized collector path to emitter, the drive current that provides LED to show, the driven for emitting lights diode is luminous, shows " last bus is crossed " information; When the O2 of shift register U7 (LAST) signal output part was low level, transistor was in cut-off state, its emitter no current output, and light emitting diode is in not luminance, does not show " last bus is crossed " information.Resistance R 44～R48 in the circuit is a current-limiting resistance, plays protection LED, and resistance R 43 is the input resistance of transistor N43, plays metering function.

As shown in Figure 4, be the electrical schematic diagram of this LED electronic stop plate line number display circuit.Among Fig. 2+the 5V direct supply through electrochemical capacitor E1 filtering after, deliver to the public bus network display circuit of Fig. 4 by NO+ and NO-port.R50 wherein, R51 ..., Rn-1, Rn, L27, L28 ..., Lm-1, how many n among the Lm and m are determined by the public bus network stroke.Its principle of work is: NO+ port+5V direct current process resistance R 50, and R51 ..., Rn-1, Rn and light emitting diode L27, L28 ..., Lm-1, Lm, the negative pole NO-port of arrival power supply constitutes the loop.When+after the 5V direct supply powered up, by above-mentioned loop, driving LED was luminous, showed public bus network information.Resistance R 50 in the circuit, R51 ..., Rn-1, Rn is a current-limiting resistance, plays protection LED.

The number of the used 74HC595 shift register of the utility model is by the number decision at public bus network station.The LAST signal that control " last bus is crossed " information shows can link to each other with last data carry-out bit of shift register, also can link to each other with other data carry-out bits of shift register.

Claims (3)

1. the electronic stop plate that shows vehicle position information, by 89C52 single-chip microcomputer as intelligent control unit, shift register, the transistor driving circuit, LED light belt display part and stabilized voltage supply are formed, it is characterized in that: omnidistance vehicle position information is finished reception by the serial data receiving port RXD of 89C52 single-chip microcomputer, (U2～U7) corresponding SRCLK interface links to each other the delivery outlet T0 of 89C52 single-chip microcomputer with a plurality of series connection CMOS shift register 74HC595 respectively with T1, to shift register input shift clock and data latch signal, under the control of these two signals, pass through the delivery outlet INT0 of 89C52 single-chip microcomputer, link to each other with the input port SER of CMOS shift register 74HC595 (U2), finish display message to shift register (the serial input of U2～U7), (U2～U7) data parallel is assigned to each data carry-out bit port output, the light belt of forming by transistor driving circuit driving LED demonstrates the omnidistance vehicle position information of public bus network again through shift register.

2. the electronic stop plate of demonstration vehicle position information according to claim 1, it is characterized in that: last position (O2) of shift register (U7) output links to each other with the base stage of transistor (N43), drive 5 lumination of light emitting diode that are connected in parallel on transistor (N43) collector in the output level mode, demonstrate " last bus is crossed " information.

3. the electronic stop plate of demonstration vehicle position information according to claim 1 and 2 is characterized in that: through electrochemical capacitor (E1) filtered direct supply, can be directly to drive the LED of public bus network number by driving circuit luminous, demonstration public bus network information.

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