CN204462845U - Campus sightseeing automatic guide tourist bus - Google Patents

Abstract

The utility model discloses an automatic tour guide car for campus sightseeing, which relates to a guide car. It includes tracking module A, fixed-point detection module B, single-chip microcomputer C, motor drive module D, ultrasonic obstacle avoidance module E and liquid crystal module F, single-chip microcomputer C and tracking module A, fixed-point detection module B, motor drive The obstacle avoidance module E is connected with the liquid crystal module F, and the model of the single-chip microcomputer C is AT89C51; the single-chip microcomputer C is also connected with the ISD4003 voice chip. The utility model uses AT89S51 as the core CPU to realize the unmanned driving of the sightseeing car, collect, process and output control the optical signal. At the same time, pulse width modulation is used to regulate the rotation number of the driving motor when the sightseeing car turns and there are pedestrians in front. When pedestrians are too close, directly cut off the power supply of the sightseeing car and brake urgently to ensure safety.

Description

Campus sightseeing automatic guided vehicle

technical field

The utility model relates to a guide car, in particular to an automatic guide car for campus sightseeing.

Background technique

Generally, when people visit university campuses and tourist attractions with a large number of people, if there is no help from guides and tour guides, they will be very blind when visiting campuses and tourist attractions, resulting in a waste of time and reducing the number of tours. However, increasing the number of guides and tour guides will greatly increase the operating costs of campuses and tourist attractions, and they are more likely to be disturbed by other factors.

Utility model content

Aiming at the deficiencies existing in the prior art, the purpose of this utility model is to provide an automatic tour guide car for campus sightseeing, which is convenient for tourists to visit and the management of scenic spot staff, and greatly improves the time when people visit scenic spots without a tour guide in the past. The blind and time-wasting situations allow people to understand and visit the scenic spots with the greatest efficiency in the shortest possible time. The system is stable in operation, low in cost, good in compatibility, and free from interference from the external environment. It is an automatic system with high cost performance and is suitable for various applications.

In order to achieve the above object, the utility model is achieved through the following technical solutions: campus sightseeing automatic guide car, including tracking module A, fixed-point detection module B, single-chip microcomputer C, motor drive module D, ultrasonic obstacle avoidance module E and liquid crystal module F, single-chip microcomputer C is respectively connected with tracking module A, fixed-point detection module B, motor drive module D, ultrasonic obstacle avoidance module E and liquid crystal module F, and the model of described single-chip microcomputer C is AT89C51; described single-chip microcomputer C is also connected with ISD4003 voice The chip is connected, the peripheral circuit of the chip is simple, serial port debugging, built-in memory, built-in power drive.

The tracking module A includes a first light-emitting diode D1, a second light-emitting diode D2, a first resistor R1, a second resistor R2, a third resistor R3 and a voltage comparator AR1, the first light-emitting diode D1 positive pole, the second light-emitting diode The cathode of the diode D2, one end of the third resistor R3, and the voltage comparator AR1 are connected, the cathode of the first light-emitting diode D1 is connected to the first resistor R1 to the ground terminal, the anode of the second light-emitting diode D2 is respectively connected to the second resistor R2 to the ground terminal, and the third resistor One end of R3 is the inverting end of the voltage comparator AR1, the other end of the third resistor R3 is grounded, and the sliding end of the third resistor R3 is connected to the non-inverting end of the voltage comparator AR1; the model of the voltage comparator AR1 is LM324.

The circuit structure of the fixed point detection module B is the same as that of the tracking module A.

The motor driving module D includes a turning driving module and a forward driving module, and the turning driving module and the forward driving module are respectively connected to different DC motors.

The ultrasonic obstacle avoidance module E adopts the CX20106 ultrasonic chip.

The beneficial effect of the utility model is that it is convenient for tourists to visit and the management of scenic spot staff, and greatly improves the blind and time-wasting situation when people visit scenic spots without a tour guide in the past, so that people can get the most attention in the shortest time. Efficiently understand and visit attractions. The system is stable in operation, low in cost, good in compatibility, and free from interference from the external environment. It is an automatic system with high cost performance and is suitable for various applications.

Description of drawings

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment;

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the circuit diagram of the tracking module of the present utility model;

Fig. 3 is the voice chip circuit diagram of the present utility model;

Fig. 4 is a motor drive circuit diagram of the utility model;

Fig. 5 is the driving circuit diagram of the ultrasonic transmitting probe of the present utility model;

Fig. 6 is a driving circuit diagram of the ultrasonic receiving probe of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Referring to Figures 1-6, this specific embodiment adopts the following technical solutions: an automatic tour guide vehicle for campus sightseeing, including a tracking module A, a fixed-point detection module B, a single-chip microcomputer C, a motor drive module D, an ultrasonic obstacle avoidance module E and a liquid crystal module F, The single-chip microcomputer C is respectively connected with the tracking module A, the fixed-point detection module B, the motor drive module D, the ultrasonic obstacle avoidance module E and the liquid crystal module F, and the model of the single-chip microcomputer C is AT89C51; the single-chip microcomputer C is also connected with the ISD4003 voice chip , providing voice services.

The tracking module A includes a first light-emitting diode D1, a second light-emitting diode D2, a first resistor R1, a second resistor R2, a third resistor R3 and a voltage comparator AR1, the first light-emitting diode D1 positive pole, the second light-emitting diode The cathode of the diode D2, one end of the third resistor R3, and the voltage comparator AR1 are connected, the cathode of the first light-emitting diode D1 is connected to the first resistor R1 to the ground terminal, the anode of the second light-emitting diode D2 is respectively connected to the second resistor R2 to the ground terminal, and the third resistor One end of R3 is the inverting end of the voltage comparator AR1, the other end of the third resistor R3 is grounded, and the sliding end of the third resistor R3 is connected to the non-inverting end of the voltage comparator AR1; the model of the voltage comparator AR1 is LM324.

In this specific embodiment, the tracking part is realized by infrared emitting and receiving tubes, wherein the transmitting tube continuously emits infrared rays, and the characteristics of the receiving tube are similar to photosensitive diodes. When the external lighting conditions change, the current flowing through it changes linearly with the light intensity. After the series voltage dividing resistor is grounded, the voltage drop at both ends of the resistor changes with the change of light intensity. At this time, assuming that there is a color band on the ground with a different color from the ground, whether the probe is in the color band can be expressed in the form of voltage. According to the difference between the color of the ground and the color of the ribbon, the potential signals generated by the two colors are also different, and then use the LM324 voltage comparator, the signal voltage is connected to the same phase terminal, the calibration signal is connected to the inverting terminal, and the calibration signal potential is the signal generated inside and outside the ribbon If there is a certain value between the voltages, whether the probe is in the color band can be reflected in the form of 1/0. And access the terminal port INT0/INT1. See Figure 2 for the specific circuit.

The fixed-point detection circuit adopts the same principle as the tracking part. The output is connected to the counter pin T0. The system can complete the fixed-point detection by drawing a small mark next to the driving line at the designated location. After the detection signal is obtained, the output signal is sent to the single-chip microcomputer. Introduction, and the supporting voice chip outputs voice introduction content at the same time. Voice chip circuit shown in Figure 3.

The main control circuit adopts AT89S51 as the control chip. AT89S51 is a low-power, high-performance 8-bit single-chip microcomputer produced by ATMEL Corporation of the United States. It contains 4K bytes of system-programmable Flash read-only program memory on the chip. Compatible with 8051 instruction system and pin. Support ISP online programming and programming methods of traditional mode.

The turning function and the forward function of this system are respectively realized by a DC motor. Because the I/O drive capability of the single-chip microcomputer is difficult to drive the DC motor, a corresponding peripheral power amplifier circuit is designed to drive the motor. Taking the steering motor as an example, the circuit diagram of this part is shown in Figure 4.

The obstacle avoidance function of this system uses ultrasonic transmitting and receiving probes, with CX20106 ultrasonic, infrared receiving chips and LM386 audio amplifiers for signal amplification. LM386 is widely used for its excellent features such as adjustable gain, stable output, and high signal-to-noise ratio. CX20106 is the most common chip in infrared and ultrasonic instruments. It adopts the feedback signal of the receiving head and transmits the signal to the microcontroller. The 40KHz square wave is sent out by the single-chip microcomputer, which is amplified by LM386 and then pushed to the transmitting head TX1. The transmitting head converts this signal into ultrasonic waves and sends them out. The ultrasonic waves are reflected by obstacles and transmitted back. After being received by the receiving head RX1, they are transmitted to CX20106 for further processing. After processing, output a square wave, which can be connected to the interrupt pin of the microcontroller, and the falling edge of the square wave can trigger the program to execute as required. See Figure 5 and Figure 6 for the specific circuit.

The concrete function realization of this specific embodiment:

1. Automatic driving: Generally, the campus area of a university is relatively large, and it is difficult for visitors to arrange the tour route reasonably. Therefore, the most scientific and reasonable driving route is pre-designed by the staff of the university, and the route is drawn in the form of a white line on the road in the campus. This system can make the sightseeing car drive automatically according to our pre-designed driving route.

2. Fixed-point detection: Use small dots as marks at scenic spots with ornamental value for system identification. The system automatically stops at the scenic spot, and introduces relevant information of the scenic spot in the form of subtitles and voice while people visit the scenic spot.

3. Obstacle avoidance function: Because there are many pedestrians on the university campus road, this function can automatically stop and issue a warning sound when there are pedestrians within a certain distance in front of the sightseeing car, so as to ensure the safety of pedestrians on the road and prevent traffic accidents.

This system uses single-chip microcomputer measurement and control technology, with AT89S51 as the core, to realize unmanned driving of sightseeing cars, to collect, process and output control optical signals. At the same time, pulse width modulation is used to regulate the driving motor when the sightseeing car turns and there are pedestrians in front. When pedestrians are too close, directly cut off the power supply of the sightseeing car and brake urgently to ensure safety. The whole set of control system is used in combination with the sightseeing car, which can realize the automatic tour guide of the whole system, which brings convenience to both the visitors and the school management.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (5)

1. campus sightseeing automatic guide tourist bus, it is characterized in that, comprise tracking module (A), fixed point detection module (B), single-chip microcomputer (C), motor drive module (D), avoiding obstacles by supersonic wave module (E) and Liquid Crystal Module (F), single-chip microcomputer (C) is connected with Liquid Crystal Module (F) with tracking module (A), detection module (B) of fixing a point, motor drive module (D), avoiding obstacles by supersonic wave module (E) respectively, and described single-chip microcomputer (C) model is AT89C51; Described single-chip microcomputer (C) is also connected with ISD4003 speech chip.

2. campus sightseeing automatic guide tourist bus according to claim 1, it is characterized in that, described tracking module (A) comprises the first light emitting diode (D1), second light emitting diode (D2), first resistance (R1), second resistance (R2), 3rd resistance (R3) and voltage comparator (AR1), first light emitting diode (D1) positive pole, second light emitting diode (D2) negative pole, 3rd resistance (R3) one end, voltage comparator (AR1) is connected, first light emitting diode (D1) negative pole connects the first resistance (R1) to earth terminal, second light emitting diode (D2) positive pole connects the second resistance (R2) respectively to earth terminal, 3rd resistance (R3) one end, voltage comparator (AR1) end of oppisite phase, 3rd resistance (R3) other end ground connection, the in-phase end of the slip termination voltage comparator (AR1) of the 3rd resistance (R3), described voltage comparator (AR1) model is LM324.

3. campus sightseeing automatic guide tourist bus according to claim 1, is characterized in that, the circuit structure of described fixed point detection module (B) is identical with tracking module (A).

4. campus sightseeing automatic guide tourist bus according to claim 1, it is characterized in that, described motor drive module (D) comprises turning driver module and advancing drive module, and turning driver module is connected from different direct current generator respectively with advancing drive module.

5. campus sightseeing automatic guide tourist bus according to claim 1, is characterized in that, described avoiding obstacles by supersonic wave module (E) adopts CX20106 ultrasound chip.