CN204576627U - A kind of contest timekeeping system based on double frequency RFID technique - Google Patents

Abstract

A kind of contest timekeeping system based on double frequency RFID technique, comprise client, main frame, active module, coil and chip, described main frame connects client and active module respectively, described coil connects chip and active module respectively, described active module connects chip, described coil is placed in competition venue, described chip is carried by sportsman, wherein, described active module comprises communicator, reader, activator appliance and time synchronism apparatus, described reader connects activator appliance and communicator respectively, described communicator tie-time synchronous device.

Description

A kind of contest timekeeping system based on double frequency RFID technique

Technical field

The utility model belongs to sports apparatus field, is specifically related to a kind of contest timekeeping system based on double frequency RFID technique.

Background technology

In marathon, often have tens or even hundreds of name player plays simultaneously, because player movement level is uneven, the time that accurate statistics every sportsman advances and the number of turns are a great problems always, even to this day, many tests and match is also had to be still by referee's complicate statistics, the not only manpower and materials of at substantial, and inevitably produce human error, the nonrepeatability of track and field events determines: can not player be allowed to replay because of the error of referee, therefore to accuracy and reliability, there is very high requirement, the high-tech contest electronic equipment of special needs.

Self-clocking meter circle equipment has been there is in current match, can the number of turns of accurate recording player, but because arrangement for reading has certain region to the reading that player wears chip, wide and efficient reading zone length reaches several meters to tens meters in the movement direction, all chip can be read in this region, for the accuracy of timekeeping of match (disparity items requires different), even if adopt directed this reading area of antenna of reading also too wide in range, the priority of player many times effectively cannot be distinguished.Note circle instead of timing is used for when using so actual, mostly combine with finish film timekeeping system (with seasonal effect in time series image), to judge ranking and the achievement of player exactly, this scheme has comparatively ripe utilization in the match of the place of track and field events.Because place match only has at most tens players to compete simultaneously, still can accept from the time requirement of workload and common match, but for large crowd's match and the higher race of requirement of real-time, then cannot meet match request.Because large crowd competes, player's quantity often reaches thousands of people or even people up to ten thousand, as marathon, and bicycle, skidding etc., relying on the image of photofinish timekeeping system to carry out interpretation, is awkward; The match that requirement of real-time is high, namely requires the achievement of showing player to spectators after player breaks through terminal, more difficult satisfied in speed.

In existing large crowd's match, in order to reduce effective reading region as far as possible, improve precision, RFID timing device often adopts following two kinds of working methods:

First hyper band 915MHz, blanket type is adopted to read antenna and passive chip, namely lay at competition field destination county and read carpet, conventional carpet width 1.2-2 rice, thickness is generally 3-5 centimetre, it is larger that this reads distance, can not guarantee again to receive chip signal at a certain marginal end annex simultaneously, reading time, difference likely reached the order of magnitude of 0.1-0.2 second, this is equivalent to migration in dependency rule is the requirement of 1/10 second (namely can distinguish the end time of player for 0.1 second) to sensing chip systemic resolution, although its lay carpet the height of (racing track) above ground level for long-distance running, footrace, marathon, the projects such as iron-man triathlon are no problem, but for bicycle, motorcycle or kart etc. cause certain influence undoubtedly, and for skidding, the projects such as cross-country skiing, player has to, and slowing down even stops crosses ground cushion, affecting the sight also reducing match while player plays sports level.

Its two employings double frequency technology, low frequency is 125KHz, high frequency is 6.8MHz, adopt carpet antenna, multiple chip can be read simultaneously, chip maximum movement speed can reach 60 kilometers/hour, its advantage is that precision is higher than super high frequency technique, theoretical value can reach 0.01 second, meet the requirement of general match of running, but because use card, charged to chip by low frequency activation part temporarily, high-frequency emission power is less, so card volume is larger, and reading distance is shorter, be no more than 1 meter of scope, that is read card can only be placed on footwear, cannot improve and be placed on other positions of health or apparatus, simultaneously because high frequency is not high enough, the requirement of the fast sports events of speed cannot be realized, as skidding and bicycle, motorcycle racing just cannot use (its speed is often higher than 60 kilometers/hour), certainly owing to adopting carpet antenna, also rapid movement project is not suitable in essence.

Another factor of restriction accuracy of timekeeping is, the timing time of base or PC system when the timing mode of traditional timer is the identifier coupling reader reading chip according to reader, when less by the number of chips of reader, the method does not have improper part, but when having a lot of motion chip simultaneously through timing point, a large amount of chips is had to send signal to reader in short time, data queue must be caused, usually can only rank according to the order of the order read instead of chip enable or transmission, and the time delay produced of queuing up also cannot compensate.

In view of the foregoing, the utility model provides a kind of contest timekeeping system based on double frequency RFID technique.

Utility model content

The utility model provides a kind of contest timekeeping system based on double frequency RFID technique, comprise client, main frame, active module, coil and chip, described main frame connects client and active module respectively, described coil connects chip and active module respectively, described active module connects chip, described coil is placed in competition venue, described chip is carried by sportsman, wherein, described active module comprises communicator, reader, activator appliance and time synchronism apparatus, described reader connects activator appliance and communicator respectively, described communicator tie-time synchronous device.

Preferably, described chip adopts 125KHz low frequency activation, and adopts 2.45GHz high frequency to send data to reader.

Preferably, described chip is the active dual-band chip of RFID.

Preferably, described coil is double loop coil.

According to the contest timekeeping system based on double frequency RFID technique that the utility model provides, double loop coil is set, and adopt different coding to arrange on two loop lines, reduce laterally (that is: direction of motion) active region, improve and longitudinally read height, thus realization fixed point activates and reads, improve accuracy of timekeeping, distinguish player better through the order of timing point and direction, effectively reduce timing device to the obstruction of player, improve system convenience and versatility.In addition, base when system carries timing, after synchronous with GPS, adopts two timing regional model, and matching chip is received the system time of chip by time of effectively activating instead of reader, realizes accurate timing note circle.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the contest timekeeping system schematic diagram based on double frequency RFID technique that the utility model preferred embodiment provides;

Fig. 2 is the contest timekeeping system workflow diagram based on double frequency RFID technique that the utility model preferred embodiment provides;

Fig. 3 is the loop line coil schematic diagram that the utility model preferred embodiment provides;

Fig. 4 be the active coding that provides of the utility model preferred embodiment and time-count cycle schematic diagram.

Embodiment

Hereinafter also describe the utility model in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.

Fig. 1 is the contest timekeeping system schematic diagram based on double frequency RFID technique that the utility model preferred embodiment provides.As shown in Figure 1, the contest timekeeping system based on double frequency RFID technique that the utility model preferred embodiment provides comprises client 1, main frame 2, active module 3, coil 4 and chip 5, described main frame 2 connects client 1 and active module 3 respectively, described coil 4 connects chip 5 and active module 3 respectively, described active module 3 connects chip 5, described coil 4 is placed in competition venue, described chip 5 is carried by sportsman, wherein, described active module 3 comprises time synchronism apparatus 31, communicator 32, reader 33, activator appliance 34, described reader 33 connects activator appliance 34 and communicator 32 respectively, described communicator 32 tie-time synchronous device 31.

In the present embodiment, described chip adopts 125KHz low frequency activation, and adopts 2.45GHz high frequency to send data to reader.。Wherein: chip is the active dual-band chip of RFID.Normally, the reading distance of reader described in the utility model is about 100 meters, and it can realize the accurate timing (such as: be greater than 200/second) of large quantity chip by point of fixity; And its recognition speed higher (such as: be greater than 200 kilometers/hour); Anti-collision is stablized; Markers precision high (such as: be greater than 0.01 second).In addition, chip performance is stablized, and waterproof is shockproof, and adopts high capacity cell, long service life (normal more than 3 years).

In this, the communication mode that described communicator adopts is, network interface (such as RJ45 joint) or GPRS pattern.After main frame is opened, initiatively carry out gps time synchronously, namely carry out superposition timing on this basis, main frame adopts high-precision crystal oscillator to carry out timing.After synchronous success, PORT COM is fed back, and LED points out.As without gps signal, by the manual mode change equipment time.

It is 1000Hz that reader low frequency activation signal carries code frequency, and after chip effectively activates, to reader transmitting chip data, reader to receive itself and hardware time scales match after chip data, immediately sends to main frame by communicator.In this, network interface or the GPRS PORT COM of main frame can switch mutually, but asynchronously work.

As mentioned above, namely the deadline is synchronous, fixed point is read, immediately read, superposition markers and send overall process in real time.Wherein, particular hardware index is: reader crystal oscillator selects active constant-temperature crystal oscillator, frequency-adjustable joint (as voltage-controlled), and precision, degree of stability are not more than ± 0.5PPm; Reader circuitry and chip low frequency activation device circuit design are on same PCB.In this, be accurate memorization COMS clip elapsed time, improve 125KHz low frequency signal and carry code frequency to 1000Hz, namely decrease the time interval in little time-count cycle, realizing accuracy of timekeeping is 0.001s.

Fig. 2 is the contest timekeeping system workflow diagram based on double frequency RFID technique that the utility model preferred embodiment provides.As shown in Figure 2, the contest timekeeping system workflow based on double frequency RFID technique that the utility model preferred embodiment provides comprises step S1 ~ S3.

Step S1: after match starts rifle sound, main frame obtains rifle and rings time and competition venue.

Specifically, main frame obtains described rifle sound time and competition venue at the time cycle internal fixtion of specifying.Comprise and obtain markers 1 (that is: rifle rings the Gun time) and geographic coordinate 2 (that is: gauge point Marker time).Wherein writing gun rings the time: main frame connects electron gun or hand push button, any time, when triggering port receives effective trigger pip (button), is sent by PORT COM its system timing time and GPS geographic coordinate immediately.Such client can obtain hardware system time and competition venue at any time.In this, two ports offered by main frame: port one, and after start, first time asks for markers, is labeled as Gun1, is then labeled as Gun2, Gun3 Port 2, after start, first time asks for markers, is labeled as Marker1, is then labeled as Marker2, Marker3 ...After successfully asking for, designated period is no longer asked in (such as 10 seconds) at every turn.

Step S2: when chip passes through two loop lines of double loop coil, activator appliance sends low frequency signal by coil and alternately produces odd even active coding continuously, after described chip enters mode of operation, be chosen as single loop line and activate or double loop activation, and judge whether to reach corresponding activation condition.

In this step, when chip judges that the low frequency signal intensity of coil transmissions reaches preset strength, enter mode of operation.The active mode of chip comprises two kinds: single loop line activates and double loop activates.

Single loop line activates corresponding activation condition: chip, by above coil, reduces continuously again, then described chip enable, and the active coding of correspondence is sent to reader after field intensity reaches peak-peak.Particularly, single loop line activation method is applicable to way mid point timing, and chip is by judging that the field strength of low frequency activation signal realizes the control of precision.Principle is as follows: chip is by the direction motion process of one, direction on loop line, draw near, field strength is increasing, reach some strength (judgment threshold), chip from dormancy unlatching work, be increased to gradually maximum after, from the close-by examples to those far off, field intensity is more and more less, program judge when field intensity reach maximum after continuous reduction be namely judged as effective activation, transmission chip and active coding data.Single loop mode, active coding regardless of odd even, 1,2,3,4 send continuously.Fig. 3 is the loop line coil schematic diagram that the utility model preferred embodiment provides.In figure 3, arrow is depicted as direction of motion, when by loop A, produces active coding 1, and during by coil B, produce active coding 2, the rest may be inferred.

Adopt single loop line chip for activating mode, loop line width can be arranged on 0.4-0.6 rice.Why loop line width is so arranged is because if arrange too small, decay aggravation above loop line in the activation field that loop line can be caused to produce, effective activation height reduction, on the other hand, because the front and back at loop line also exist effective active region, reading area is often large than loop line width, and accuracy of timekeeping is difficult to improve.

Double loop activates corresponding activation condition: chip produces first time odd even or even strange saltus step, and field intensity reaches peak-peak when reducing gradually again, described chip enable, and the last active coding of correspondence is sent to reader.Particularly, double loop activation method realizes reading of fixed place and time, adopts two-circuit activation wire, with different coding form chip for activatings (odd even ordered series of numbers).In figure 3, loop line C sends odd number code (1,3,5,7...), and loop line D sends verso (2,4,6,8...), realizes reading of fixed place and time.Chip is in motion process from left to right, by loop line C, active coding is all odd numbers, gradually near loop line D, verso detected, but be less than loop line C because loop line D produces field strength, chip record is also designated active coding and the odd number code of loop line C, when position of being kept right by effective active region, loop line D produces activation field strength and is greater than loop line C, chip record is also designated active coding and the verso of loop line D, namely odd even saltus step is produced, chip first time odd even or even strange saltus step time be judged as effectively passing through read point, record last active coding, at once data-signal is sent to reader.A lot of chip be positioned at activate rock near loop line time (as loop line being arranged on the situation of starting point), for reducing reader data conflict, chip is after first time saltus step, if do not left active region, namely detect that activating field intensity reaches some strength, then no longer respond saltus step again, do not send data.

Step S3: if so, described chip enters enable mode, and its data is sent to reader, matches with the hardware system time after described reader receives data, obtains chip through the system timing time of coil, and sends to main frame by communicator; Otherwise described chip keeps dormant state.

Fig. 4 be the active coding that provides of the utility model preferred embodiment and time-count cycle schematic diagram.As shown in Figure 4, the time of setting activator appliance timed sending N active coding is cycle Δ t and presets basal latency T, then, when reader receives active coding n, the system timing time is T+|n/N| Δ t+nmodN.Wherein, | n/N| represents the integral part of n/N quotient, and nmodN represents the remainder of n/N.So, can realize the match control of large time-count cycle (system timing) with little time-count cycle (cycle period of low frequency loop line chip for activating).

In the present embodiment, time precision is 1ms, immediately sent by PORT COM, be sent to by network interface the information that host computer or GPRS be sent to server and comprise: chip id, system timing markers, activator appliance ID, chip are by order (if double loop).When reading chip, main frame LED glimmers, and hummer sounds, and points out, and whether can arrange hummer sounding (close or open hummer) by PORT COM (network interface) or client.In this, communication modes is, is connected or is connected with main frame by GPRS by RG45 with pc client.Necessary optimum configurations can be carried out by PC or device keys and display screen to equipment, comprise: communication modes (PC or GPRS), access point are arranged, GPS is synchronous and set of time, device IP, mode of operation (double loop pattern and single loop mode), high frequency antenna receiving gain, low frequency activation signal intensity, open and close hummer, the shortest reading interval of same chip (same chip after reading how long in no longer read), set up data storage file etc.

In addition, system software also according to the athletic information of match layout, will be worn chip id and mate one by one with sportsman, realize the function of a few circle of timing.This system may be used for the projects such as track and field, bicycle, skidding, kart, guarantees the fair and just of competing.

In sum, according to the contest timekeeping system based on double frequency RFID technique that the utility model preferred embodiment provides, double loop coil is set, and adopt different coding to arrange on two loop lines, reduce horizontal active region, and improve longitudinal reading highly, thus realize fixing a point to activate and reading, improve accuracy of timekeeping, improve system convenience and versatility.In addition, base when system carries timing, after synchronous with GPS, adopts two timing regional model, and matching chip is received the system time of chip by time of effectively activating instead of reader, realizes accurate timing note circle.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (4)

1. the contest timekeeping system based on double frequency RFID technique, it is characterized in that, comprise client, main frame, active module, coil and chip, described main frame connects client and active module respectively, described coil connects chip and active module respectively, and described active module connects chip, and described coil is placed in competition venue, described chip is carried by sportsman

Wherein, described active module comprises communicator, reader, activator appliance and time synchronism apparatus, and described reader connects activator appliance and communicator respectively, described communicator tie-time synchronous device.

2. the contest timekeeping system based on double frequency RFID technique according to claim 1, is characterized in that, described chip adopts 125KHz low frequency activation, and adopts 2.45GHz high frequency to send data to reader.

3. the contest timekeeping system based on double frequency RFID technique according to claim 1, is characterized in that, described chip is the active dual-band chip of RFID.

4. the contest timekeeping system based on double frequency RFID technique according to claim 1, is characterized in that, described coil is double loop coil.