CN201955828U

CN201955828U - Multifunctional intelligent vehicle timer

Info

Publication number: CN201955828U
Application number: CN2010206222629U
Authority: CN
Inventors: 李兆凯; 冷立; 肖媛; 韩毅; 张伟
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2010-11-24
Filing date: 2010-11-24
Publication date: 2011-08-31
Anticipated expiration: 2020-11-24

Abstract

The utility model discloses a multifunctional intelligent vehicle timer, which comprises a timing point passing signal collection module, a signal display module, a power supply adapter and a timing and electromagnetic signal generation module, wherein the power supply adapter is respectively connected with the timing point passing signal collection module, the timing and electromagnetic signal generation module and the signal display module through a voltage stabilizing chip, the timing point passing signal collection module comprises a laser emission tube, a four-freedom-degree manual adjustable reflecting mirror and a laser receiving circuit which are sequentially connected, the timing and electromagnetic signal generation module comprises a voltage comparison chip, a single chip computer and a triode H-bridge power output circuit which are sequentially connected, and the signal display module is connected with the single chip computer. The multifunctional intelligent vehicle timer has the advantages that the cost is low, the use is simple, the carrying is convenient, and the goals of simultaneously using the timer for intelligent automobile electromagnetic group debugging, matching single-ring timing and electromagnetic signal generation are effectively realized.

Description

The multifunctional intelligent vehicle timer

Technical field

The utility model relates to the self-clocking field, relates in particular to a kind of intelligent vehicle timer, and it can be realized the automobile race timing, test the speed and the generation of racing track signal.

Background technology

The higher education department of portion of receiving an education entrusts, and robotization professional teaching steering committee of institution of higher education is responsible for sponsoring the contest of national college students' intelligent vehicle.One of the whole nation five big contests that the Ministry of Education sponsors have been listed in this match in.This race has been held too much in Korea S, and in China, the contest of " Freescale " cup national college students' intelligent vehicle was successfully held five.It is all multidisciplinary that its professional knowledge relates to control, pattern-recognition, sensing technology, automotive electronics, electric, computing machine, machinery etc., cultivation to students'knowledge fusion and manipulative ability, to the study science raising of art level of institution of higher education control and automotive electronics, has good impetus.The 5th national university " Freescale cup " intelligent automobile contest has increased " electromagnetism group " newly.According to the match technical requirement, the contest of electromagnetism group, the intelligent vehicle that needs the player to design can detect the field signal that the 20KHz exchange current produces in the laying wire under the road axis, comes guide trolleys to follow line with this and travels.

During match, the individual pen time is very important achievement reference value, and in the debug process, individual pen speed also is to weigh software and hardware to set the most effective reference quantity at ordinary times.So how making things convenient for and obtaining the individual pen time accurately is the problem that all entrants face jointly.Because match is comparatively expensive with the timer price, will be connected across the runway both sides by sensor, the track laying more complicated, for easy debugging at ordinary times is to use manual time-keeping, timing accuracy can't guarantee at all like this.The electromagnetism group is debugged at ordinary times in addition and the AC power that needs to satisfy the 20KHz of match technical requirement during the games drives coil under the racing track center line, commercially available waveform signal generating means price is very expensive, is specifically designed to also nearly hundred yuan of the prices of the generator of electromagnetism group match.

In order to solve the operability and the precision problem of the timing of intelligent vehicle runway, reduce cost simultaneously.The design provides a kind of novel timer, and this timer can write down the intelligent vehicle individual pen time, and can also demonstrate the individual pen average speed, helps the user can comprehensively grasp the trolley travelling situation.In addition, the design can also uninterruptedly produce the 20KHz AC signal that power supply magnetic group dolly tracks and needs simultaneously in timing, has solved timer generator branch and has been arranged than complicated structure.

Summary of the invention

The purpose of this utility model is to provide a kind of multifunctional intelligent vehicle timer, and it can be used for debugging of intelligent automobile electromagnetism group and match individual pen timing and electromagnetic signal simultaneously and take place.

In order to realize above-mentioned technical goal, the utility model adopts following technical scheme to be achieved:

A kind of multifunctional intelligent vehicle timer, comprise that timing point passes through signal acquisition module, signal display module and power supply adaptor, also comprise timing and electromagnetic signal generation module, power supply adaptor links to each other with electromagnetic signal generation module and signal display module by signal acquisition module, timing with timing point respectively by the voltage stabilizing chip; Described timing point comprises LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF and laser pick-off circuit by signal acquisition module, and LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF link to each other successively with the laser pick-off circuit; Described timing and electromagnetic signal generation module comprise voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit, and voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit link to each other successively; Signal display module links to each other with single-chip microcomputer again.

Other technologies of the present utility model are characterized as:

Described voltage comparable chip is a LM359 voltage comparable chip, and described single-chip microcomputer is STC89C52RC.

Described voltage stabilizing chip is 7805 serial linear voltage stabilization chips.Described signal display module adopts 4 anode charactrons altogether.

Therefore, the utility model compared with prior art has the following advantages:

(1) low cost: using cheap STC89C52RC single-chip microcomputer as core, fully use the hardware capability of single-chip microcomputer, is that timer, two kinds of critical functions of signal generator have been realized in the center with the single-chip microcomputer;

(2) use simple: the ordinary optical timer pass through signal pickup assembly, need circuit part across the runway both sides, not only have and settle the problem of locating, also have the difficulty of track laying.Among the design, owing to adopted the principle of direct reflection, have only one side to use Laser emission and receiving trap by signal pickup assembly, avoid the harvester emission, received the loaded down with trivial details of two cover circuit, and the adjustable mirror base of 4DOF, the adjustment that makes the test section circuit use becomes simple;

(3) be easy to carry: this timer has only the many sizes of palm, takes into account two kinds of major functions simultaneously, more the small size more function;

(4) diverse in function: the Lap Time timing, signal takes place, and circle average velocity calculates;

(5) recording visual result shows: timer timing result (time, average velocity) shows output by 4 charactrons.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is Laser emission of the present utility model and sensing module circuit diagram.

Fig. 3 is a signal generation control module circuit diagram of the present utility model.

Fig. 4 is a triode H bridge power output module circuit diagram of the present utility model.

Fig. 5 is a charactron display module circuit diagram of the present utility model.

Fig. 6 is 2 * 2 keyboard circuit figure that are used for the setting of racing track distance of the present utility model.

Fig. 7 is a program flow diagram of the present utility model.

Below in conjunction with accompanying drawing particular content of the present utility model is described in further detail.

Embodiment

The utility model uses laser tube emission light beam to pass runway and arrives opposite side, returned to inject infrared receiving tube by the flat mirror reflects on opposite, be translated into digital signal by comparator circuit again, this signal is gathered as the trigger pip of dolly by timing point by single-chip microcomputer STC89C52RC.Can measure and show the Lap Time of trolley travelling on this basis and calculate average running speed, and show by charactron.When realizing above function, the design has electromagnetism group signal generation function simultaneously, provides signal for electromagnetism group dolly tracks.

Referring to each accompanying drawing, a kind of multifunctional intelligent vehicle timer, comprise that timing point passes through signal acquisition module, signal display module and power supply adaptor, also comprise timing and electromagnetic signal generation module, power supply adaptor links to each other with electromagnetic signal generation module and signal display module by signal acquisition module, timing with timing point respectively by the voltage stabilizing chip; Described timing point comprises LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF and laser pick-off circuit by signal acquisition module, and LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF link to each other successively with the laser pick-off circuit; Described timing and electromagnetic signal generation module comprise voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit, and voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit link to each other successively; Signal display module links to each other with single-chip microcomputer again.

The utility model is a background with " Freescale " cup national college students' intelligent automobile contest electromagnetism group, adopts the STC89C52RC single-chip microcomputer as handling core, control timing, data presentation and control H bridge output AC signal etc.

The luminous back of utilization laser tube is reflective on infrared receiving tube by flat mirror reflects, produces the low level signal that can trigger external interrupt INT0 through comparable chip LM359 thereby make the receiving tube resistance variations change terminal voltage.Make dolly be identified by triggering external interrupt, begin to carry out timing by timing point.Cause that for the structure that prevents dolly itself may cause one way repeatedly to trigger the start of a race accident stops, this timer can not trigger within two seconds once more, thereby prevented that the start of a race from repeating identification.

Before the timer operation, the system prompt user uses the length of 2 * 2 keyboards input racing track, two on the right press key control input unit for centimetre racing track length, top for adding 1 centimetre, following adds 10 centimetres; Pressing of the corresponding left side above the key is to add 1 meter, and following is to add 10 meters.And the racing track length of input can be presented at 4 altogether on the anode charactrons, and two units on the left side are rice, and two units on the right are centimetre.After input finishes, make timer enter the preparation time status by the key of pressing of pressing down the INT1 interruption.As need change racing track length value, press down the RESET key and get final product.After the off identification, the timing master routine brings into operation.Method for scanning is by turn used in 4 common anode charactrons demonstrations, and 1/100th seconds is least count unit, takies two charactrons, takies two other charactron then second, separates decimally in the middle of two system of units.The demonstration sign indicating number that the charactron display digit needs adopts look-up table, calls the coding schedule after program in advance in order according to the time value that shows needs.In order to utilize the visual persistence effect of human eye, the scanning display digit cycle that needs less than 40ms about, and the minimum time of day of this counter is 10ms, the reading scan cycle is 10ms in the program, so meet the demands.And each 10ms needs in the cycle to show 4, so every 2.5ms calculates and digit order number of display update in the program, single-chip microcomputer timer internal timer1 is used in the 2.5ms time-delay.When dolly passed through timing point for the second time, charactron output demonstration Lap Time timing time continued two seconds, shows that and then the average velocity of calculating gained continues two seconds, enters the preceding waiting status of timing then and prepares reclocking.

The signal generator function produces the alternating current of 20KHz under the prerequisite that does not influence all the other functions on the macroscopic view, opens and closes Control current to flow to by 4 triodes of control H bridge.And 4 triodes of the design's H bridge are respectively by 4 IO mouth controls, the binary number of four IO mouth correspondences output 1010 and be cycle negate back and forth with the time0 timer 25ns regularly of the inner higher priority of single-chip microcomputer, thereby control H bridge is cyclomorphosis electric current outbound course with 20KHz, output amplitude is that the AC signal of 5V outputs to the wire connecting ends mouth by 100 ohm of adjustable resistances, produces the required tracing signal of electromagnetism group so that connect the runway center conductor.

Claims

1. multifunctional intelligent vehicle timer, comprise that timing point passes through signal acquisition module, signal display module and power supply adaptor, it is characterized in that: also comprise timing and electromagnetic signal generation module, power supply adaptor links to each other with electromagnetic signal generation module and signal display module by signal acquisition module, timing with timing point respectively by the voltage stabilizing chip; Described timing point comprises LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF and laser pick-off circuit by signal acquisition module, and LASER Discharge Tube, the manual adjustable reflective mirror of 4DOF link to each other successively with the laser pick-off circuit; Described timing and electromagnetic signal generation module comprise voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit, and voltage comparable chip, single-chip microcomputer and triode H bridge power output circuit link to each other successively; Signal display module links to each other with single-chip microcomputer again.

2. multifunctional intelligent vehicle timer as claimed in claim 1 is characterized in that: described voltage comparable chip is a LM359 voltage comparable chip.

3. multifunctional intelligent vehicle timer as claimed in claim 1 is characterized in that: described single-chip microcomputer is STC89C52RC.

4. multifunctional intelligent vehicle timer as claimed in claim 1 is characterized in that: described voltage stabilizing chip is 7805 serial linear voltage stabilization chips.

5. multifunctional intelligent vehicle timer as claimed in claim 1 is characterized in that: described signal display module adopts 4 anode charactrons altogether.