CN204008691U - The shuttlecock velocity-measuring system of a kind of combination laser array and intelligent terminal - Google Patents
The shuttlecock velocity-measuring system of a kind of combination laser array and intelligent terminal Download PDFInfo
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- CN204008691U CN204008691U CN201420312343.7U CN201420312343U CN204008691U CN 204008691 U CN204008691 U CN 204008691U CN 201420312343 U CN201420312343 U CN 201420312343U CN 204008691 U CN204008691 U CN 204008691U
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Abstract
The shuttlecock velocity-measuring system of a kind of combination laser array and intelligent terminal is provided, and this system comprises that ball speed acquisition subsystem and ball speed show, ADMINISTRATION SUBSYSTEM.Ball speed acquisition subsystem comprises emitter and receiving trap, and emitter and receiving trap lay respectively at the two ends of net top; Emitter comprises generating laser array, wireless module, controller, supply module; Receiving trap comprises laser sensor array, wireless module, controller, supply module, bluetooth module, display module; Generating laser array has the laser head that two rows equidistantly arrange, and can launch two groups of parallel laser beam, and every group of laser beam is comprised of the multiple laser of equidistantly arranging in same plane, and the plane at two groups of parallel laser beam places is all parallel to net; Laser sensor array has the laser sensor that two rows equidistantly arrange, for receiving two groups of parallel laser beam of being launched by generating laser array; Supply module can exchange and supply and/or powered battery; Can wireless data communication between two subsystems; Ball speed shows, ADMINISTRATION SUBSYSTEM comprises intelligent terminal, the function such as can realize that Speed display, historical record, highest record and achievement are shared.
Description
Technical field
The utility model relate generally to laser velocimeter technical field.Especially, relate to the shuttlecock velocity-measuring system of a kind of combination laser array and intelligent terminal, belong to athletic training instrument field.
Background technology
Along with the raising of people's living standard, outside the busy work of anxiety, more and more pay attention to the exercise of health.And badminton, due to Qi China mass foundation and motor development level widely, is liked by numerous sports fans.In badminton game, if service technique is high, can make direct scoring average high, the other side is returned serve of low quality, in order to own attack.
Existing feather billiard table, when team member trains, has only been to provide the platform of exercise, cannot obtain team member's serve speed, is not easy to like this team member's service feature to analyze, so that improve its service quality.But when carrying out badminton, except score, there is no the better metering system to ball-hitting quality, speed.Some race now, has the measurement to striking speed, but all will be by means of expensive import measuring equipment.These equipment all cannot spread at ordinary times in badminton field.
Existing court velocity measuring technique comprises:
One, the foreign technology of price, monopolization, for example, " hawkeye system " (formal title is " instant playback system "), at cricket, a set of computer system of using in tennis and other motions, with the graph image of the path of tracing record ball the Actual path of demonstration record, also can predict the ball path in future.In some motions, as tennis, hawkeye system has become a part for judge's process.This system is comprised of 8 or 10 high-speed camera heads, four computers and giant-screen.First, the calculating by computer is separated into the solid space in competition area the measuring unit of calculating with millimeter; Then, utilize high-speed camera head to catch from different perspectives the master data of tennis flight path simultaneously; By computer, calculate again, by these data generating three-dimensional images; Finally utilize instant imaging technique, by giant-screen, clearly presented moving line and the drop point of tennis." hawkeye " technology is the most general velocity measuring technique, and its shortcoming is that technological core is abroad controlled, and speed measuring equipment involves great expense, civilian universal difficulty.
Two, radar velocity measurement and sensor test the speed.Specifically can be referring to following table 1.
Three, popular technology, for example, three axis accelerometer.Shortcoming is mounted on existing equipment, cannot in real racetrack, apply, and affects existing product performance.
Along with emerging in large numbers of current smart machine, how can be by measurement data and intelligent terminal to combination; How can reflect accurately dynamics and the quality of batting by the means of science, the line item of going forward side by side is followed the tracks of final by data acquisition rule, and the training of being better correlated with, to obtain the raising of technical ability in body-building, has become problem demanding prompt solution.
The advantage of the system and method that the utility model proposes is: technology maturation, with low cost being easy to are popularized; And interesting strong, there is social functions, user's viscosity is high.
Utility model content
The utility model overcomes the deficiency that prior art exists, and the shuttlecock velocity-measuring system of a kind of combination laser array and intelligent terminal is provided.The utility model has adopted following technical scheme:
A shuttlecock velocity-measuring system for combination laser array and intelligent terminal, wherein:
This system comprises that ball speed acquisition subsystem and ball speed show, ADMINISTRATION SUBSYSTEM, wherein
Described ball speed acquisition subsystem comprises emitter and receiving trap, and described emitter and receiving trap lay respectively at the two ends of net top;
Described emitter comprises: generating laser array, wireless module, controller, supply module;
Described receiving trap comprises: laser sensor array, wireless module, controller, supply module, bluetooth module, display module;
Described generating laser array has the laser head that two rows equidistantly arrange, can launch two groups of parallel laser beam, wherein every group of laser beam is comprised of the multiple laser of equidistantly arranging in same plane, and the plane at described two groups of parallel laser beam places is all parallel to net;
Described laser sensor array has the laser sensor that two rows equidistantly arrange, and for receiving two groups of parallel laser beam of being launched by generating laser array, wherein each laser sensor receives the signal of a corresponding laser head;
Described wireless module is for sending wireless instructions to emitter;
Described wireless module is for receiving the wireless instructions from receiving trap, to control the opening and closing of generating laser array;
Described supply module comprises Alternating Current Power Supply module and/or powered battery module, and described powered battery module comprises rechargeable battery and charging circuit;
Described bluetooth module is for realizing the wireless data communication between ball speed acquisition subsystem and the demonstration of ball speed, ADMINISTRATION SUBSYSTEM;
Described display module is for the duty of display ball speed acquisition subsystem;
Described ball speed shows, ADMINISTRATION SUBSYSTEM comprises intelligent terminal, and this intelligent terminal has bluetooth module, can realize Speed display, historical record, highest record and achievement sharing function.
Further, described display module comprises LED light and/or display screen.
Further, described ball speed acquisition subsystem and ball speed show, ADMINISTRATION SUBSYSTEM can be used special-purpose A-frame to fix, and also can be fixed on net pillar.
Further, the equipment that described bluetooth module can have blue tooth communication function with other carries out communication, and this bluetooth module is supported bluetooth 4.0 agreements backward compatible.
Further, described wireless module is fixed frequency wireless communication module or infrared module.
Further, in every group of laser beam, the distance between every adjacent two bundle laser is less than the ball size of shuttlecock.
Further, described every group of laser head and every group of laser sensor are and are connected in parallel.
Further, described controller is Programmable Logic Controller.
Further, described Programmable Logic Controller has UART port, ADC detection port, and external interrupt port.
Accompanying drawing explanation
The utility model will describe by embodiment and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is according to the system architecture diagram of an embodiment of the utility model.
Fig. 2 is according to the system scheme of installation of an embodiment of the utility model.
Fig. 3 is according to the circuit block diagram of the ball speed acquisition subsystem of an embodiment of the utility model.
Description of reference numerals:
1, ball speed acquisition subsystem, 2, ball speed shows, ADMINISTRATION SUBSYSTEM, 3, intelligent terminal, 4, emitter, 5, receiving trap, 6, generating laser array, 7, laser sensor array, 8, wireless module, 9, wireless module, 10, controller, 11, supply module, 12, bluetooth module, 13, display module, 14, net, 15, shuttlecock, 16, laser head, 17, laser sensor, 18, Alternating Current Power Supply module, 19, powered battery module, 20, rechargeable battery, 21, charging circuit.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and preferred embodiment, the utility model is further elaborated.Should be appreciated that preferred embodiment described herein is only for the technical solution of the utility model is described, and be not used in restriction the utility model.
First, the application's velocity-measuring system and radar velocity measurement system of the prior art and sensor velocity-measuring system are contrasted, in Table 1:
The contrast of table 1 the application's velocity-measuring system and existing radar velocity measurement system, sensor velocity-measuring system
Secondly, below in conjunction with accompanying drawing, describe the application's technical scheme in detail.
Fig. 1 is according to the system architecture diagram of an embodiment of the shuttlecock velocity-measuring system of a kind of combination laser array of the utility model and intelligent terminal.
As shown in Figure 1, the system architecture of the shuttlecock velocity-measuring system of combination laser array of the present invention and intelligent terminal is divided into two parts.Part one is ball speed acquisition subsystem 1, and it comprises emitter 4, the receiving trap 5 that can launch, receive laser beam; Part two is that ball speed shows, ADMINISTRATION SUBSYSTEM 2, and it comprises intelligent terminal 3; Between two parts, by bluetooth module 12, carry out wireless data communication.Wherein, described wireless module 8,9 can be supported the wireless or infrared communication technique of fixed frequency; Described intelligent terminal 3 can be mobile phone or the panel computer of supporting intelligent operating system (for example Android or Apple Macintosh operating system), or notebook computer etc.
Shuttlecock both sides can use a set of system of the present invention; More preferably, both sides also can respectively have a set of complete system, by the intelligent terminal acquisition ball speed value of party of one's own.
As preferably, the part that tests the speed of whole system is used conventional laser sensing device, and low price, technology maturation, can be equipped with bluetooth 4.0 low-power consumption communication modules.
Communication between ball speed acquisition subsystem 1 and the demonstration of ball speed, ADMINISTRATION SUBSYSTEM 2 (intelligent terminal 3) realizes by the bluetooth module 12 in receiving trap 5, and described bluetooth module 12 is connected with the controller 10 in receiving trap 5.
Ball speed shows, the display section of ADMINISTRATION SUBSYSTEM 2 utilizes the intelligent terminal 3 that current popularization degree is very high, and its basic function comprises: real-time speed demonstration, historical record, highest record, achievement are shared etc.When reducing system cost, conveniently carry out the exploitation of application program, and can share with friend by intelligent terminal 3 is convenient, increase the interest of body-building, motion.
Fig. 2 is system scheme of installation according to an embodiment of the invention.As shown in Figure 2:
Two subsystems of the present invention: ball speed acquisition subsystem 1, ball speed show, ADMINISTRATION SUBSYSTEM 2 can be used special-purpose A-frame to be fixed, and also can be fixed on the pillar of net.Preferably the special-purpose A-frame of use is fixed, stable, firm, and for coordinating the angular adjustment of reception and transmitting terminal, spy arranges calibration point and can conveniently proofread and correct simultaneously.
Described ball speed acquisition subsystem 1 is fixed on the top of net 14; Described ball speed shows, the position of ADMINISTRATION SUBSYSTEM 2 can be placed arbitrarily, has illustrated intelligent terminal 3 is fixed on the pillar of net in the embodiment of Fig. 2, also can be arranged in other positions, for example, in limit trainer's hand.
This ball speed acquisition subsystem 1 comprises two parts altogether, the one, and emitter 4, two, receiving trap 5., in net 14 two ends of court, position should be higher than net 14 these two devices to be fixed respectively to (for example, with special stand, or being directly fixed on two net columns).
The generating laser array 6 of emitter 4 has the equidistant laser head 16 of two rows, can launch two groups of parallel laser beam, wherein every group of laser beam is comprised of the multiple laser of equidistantly arranging in same plane, and the plane at described two groups of parallel laser beam places is all parallel to net 14;
The laser sensor array 7 of receiving trap 5 has the equidistant laser sensor 17 of two rows, and for receiving two groups of parallel laser beam by 6 transmittings of generating laser array, wherein each laser sensor 17 receives the signal of a corresponding laser head 16.
For example, generating laser array 6 can be divided into two groups by 60 laser heads 16, and 30 every group and in a row, form 30*2 array, spacing is consistent.Wherein every 3 are cascaded, by 11.1V powered battery constant current output, by controller 10 (MCU) gauge tap.
For example, laser sensor array 7 can be divided into two groups by 60 phototriodes, and 30 every group and in a row, form 30*2 array, spacing is consistent, identical with Laser emission array 6.By 30 every group and be unified into a road output, while being all subject to Ear Mucosa Treated by He Ne Laser Irradiation, be output as high level, when wherein any is not subject to Ear Mucosa Treated by He Ne Laser Irradiation, output changes low level into, by controller 10 (MCU), interrupts processing.
Generating laser array 6 will penetrate the collimated laser beam that two interlamellar spacings are equal above net 14, be mapped on the laser sensor array 7 on opposite, when shuttlecock 15 flies over net 14 top, can block successively two-layer laser beam, after laser sensor 17 by laser sensor array 7 has detected light beam and has been blocked, controller 10 can be recorded the time interval that two bundle laser are blocked, because the interval S between two bundle laser is known, therefore can obtain the average velocity V of shuttlecock 15 when through this segment distance.And laser beam spacing is less, the velocity amplitude of obtaining is more accurate.
Fig. 3 is the circuit block diagram of ball speed acquisition subsystem according to an embodiment of the invention.As shown in Figure 3, the functional description of each several part is as follows:
Left side is receiving trap 5, and right side is emitter 4.Device 4 and 5 has controller 10, supply module 11, and wherein supply module 11 comprises Alternating Current Power Supply module 18 and/or powered battery module 19, and described powered battery module 19 comprises rechargeable battery 20 and charging circuit 21.The bluetooth module 12 of receiving trap 5 is for realizing the wireless data communication between ball speed acquisition subsystem 1 and the demonstration of ball speed, ADMINISTRATION SUBSYSTEM 2.Described display module 13 is for the duty of display ball speed acquisition subsystem 1.Wireless transmitter module 9 is for sending wireless instructions to emitter 4; Wireless receiving module 8 is for receiving the wireless instructions from receiving trap 5, to control the opening and closing of generating laser array 6.
Emitter 4:
Start supply module 11, relay indicating light lights, and enters standby mode, and wait receiving trap 5 is assigned instruction; Wireless module 8 is received " test " instruction that receiving trap 5 sends, control generating laser array 6 glittering 3 times according to assigned frequency; Receive " startup " instruction that receiving trap 5 sends, control generating laser array 6 and light; Receive " closing " instruction that receiving trap 5 sends, control generating laser array 6 and close.In powered battery module 19, during the capacity of rechargeable battery 20 (being less than 30 minutes service time) on the low side, the low electric pilot lamp of battery lights, and prompting should be charged in time.
Receiving trap 5:
Start supply module 11, relay indicating light lights, and enters standby mode, and wait intelligent terminal 3 is assigned instruction; Bluetooth module 12 is received " test " instruction that intelligent terminal 3 sends, and by 9 pairs of emitters of wireless module 4, sends " test " instruction, waits for that emitter 4 starts; Whether glittering according to assigned frequency by laser sensor array 7 detection laser, judge that whether emitter 4 installation sites are correct, whether normally work; If working properly, by bluetooth module 12, to intelligent terminal 3, return to " ready " instruction, enter standby mode, wait intelligent terminal 3 is assigned instruction; Receive " startup " instruction that intelligent terminal 3 sends, then instruction is sent to emitter 4; Laser sensor array 7 detection laser sensors 17 enter duty after all having lighted, and pilot lamp lights, and to intelligent terminal 3, send " starting " instruction; When laser sensor array 7 has detected shuttlecock successively through 2 layers of laser array, system timer is recorded twice sensor feedback signal time T 1 and T2, by bluetooth module 12, send to intelligent terminal 3, by intelligent terminal 3, be responsible for calculating the movement velocity of shuttlecock; After receiving " closing " instruction that intelligent terminal 3 is sent, by wireless module 9, send to emitter 4, enter standby mode.In powered battery module 19, during the capacity of rechargeable battery 20 (being less than 30 minutes service time) on the low side, the low electric pilot lamp of battery lights, and prompting should be charged in time.
Wireless receiving module 8:
Adopt 315M fixed frequency wireless module, receive instruction, pass to controller 10 (MCU), then by controller 10 (MCU) processing instruction, control laser array and open or close.
Wireless transmitter module 9:
Adopt 315M fixed frequency wireless module, by the controller 10 (MCU) of receiving trap 5, controlled, to emitter 4, send instruction, opening and closing laser array.
Controller 10:
AVR series monolithic is used in design, is responsible for receiving signal, control device 4 and 5.Controller 10 (MCU) hardware resource of receiving trap 5 needs: multichannel I/0 output port, 1 group of UART port, 1 road ADC port, 2 tunnel external interrupt ports.Controller 10 (MCU) hardware resource of emitter 4 needs: multichannel I/0 output port, 1 road ADC port, 1 tunnel external interrupt port.
Bluetooth module 12:
Bluetooth module 12 is connected by UART port with controller 10 (MCU), and the control order receiving is sent to controller 10 (MCU), and the information returned of transfer control 10 (MCU).As preferably, described bluetooth module 12 possesses bluetooth 4.0 mechanicss of communication, now, between controller 10 (MCU) and bluetooth module 12, by low-power consumption bluetooth 4.0 communications protocol, communicates.
Wherein, the data protocol of bluetooth module 12 communications: use serial communication protocol, be defaulted as 81 bytes, without position of rest, no parity, baud rate is 38400, can modify according to use habit.
Wherein, the data packet format of bluetooth module 12 communications: packet is 4 bytes altogether: first byte (fixed value), command byte, data byte 1 (data low level), data byte 2 (data are high-order), wherein:
(1) first byte can be set to a fixed numbers, is judged whether unanimously, for carrying out identification of data packets by intelligent terminal 3.
(2) command byte is instruction code, and odd number is that intelligent terminal 3 sends instruction, and even number is receiving trap 5 link orders.
(3) data byte is 2 bytes, during use, 2 bytes is merged into 1 16 bit digital, is mainly used in representing time parameter, chronomere: microsecond (us).
Display module 13:
Display module 13 comprises green indicating lamp LED0, red led LED1, red led LED2, blue indicator light LED3, is controlled respectively by controller 10 (MCU), and indication device is in different duties.The duty of described pilot lamp is as follows:
Green indicating lamp LED0 lights: receiving trap 5 has started;
Red led LED1 lights: have laser sensor 17 not to be subject to for a long time Ear Mucosa Treated by He Ne Laser Irradiation;
Red led LED2 is glittering: rechargeable battery 20 undertensions;
Blue indicator light LED3 is glittering: connect with controller 10.
Supply module 11:
Supply module 11 is taked mains-supplied (Alternating Current Power Supply module 18) and the parallel mode of powered battery (powered battery module 19), and because this device aims at covered court design, covered court power supply is relatively easy to solve.At the venue easily of powering, adopt the mode of direct mains-supplied, in the place that is difficult for wiring, adopt chargeable lithium cell power supply, once charging is guaranteed normally to use more than 8 hours.
Rechargeable battery 20:
The poly-lithium battery that design use 3.7V capacity is 2000mAh and 11.1V8000mAh, as power supply, is respectively receiving trap 5 and emitter 4 power supplies.
Charging circuit 21:
Use high-power lithium battery charging circuit for battery 20 chargings, improve device charge efficiency.
The shuttlecock scheme principle that tests the speed is:
Distance between two groups of laser beam place planes is fixed as S (for example 50 millimeters), when shuttlecock 15 is during through first group of laser beam place plane, system can be T1 (unit is microsecond us) writing time, when shuttlecock 15 is during through second group of laser beam place plane, the system log (SYSLOG) time is T2, the difference Δ T=T2-T1 of twice, the average velocity that shuttlecock 15 moves in region between two groups of laser beam place planes is V:
V＝S/ΔT＝S/(T2-T1)。
In above formula, S is fixed constant (actual measured value), described ball speed acquisition subsystem 1 is responsible for obtaining T1, T2 numerical value, ask its difference and send to the demonstration of ball speed, ADMINISTRATION SUBSYSTEM 2, then, intelligent terminal 3 by the demonstration of ball speed, ADMINISTRATION SUBSYSTEM 2 calculates, and obtains the movement velocity V of shuttlecock 15.The functions such as described ball speed shows, ADMINISTRATION SUBSYSTEM 2 can realize that Speed display, historical record, highest record and achievement are shared.
The foregoing is only preferred embodiment of the present utility model,, in order to limit the utility model, the part of wherein not addressing is not in detail those of ordinary skills' common practise.Protection domain of the present utility model is as the criterion with the content of claim, all any modifications of doing within spirit of the present utility model and principle, is equal to and replaces and improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. in conjunction with a shuttlecock velocity-measuring system for laser array and intelligent terminal, it is characterized in that:
This system comprises that ball speed acquisition subsystem (1) and ball speed show, ADMINISTRATION SUBSYSTEM (2), wherein
Described ball speed acquisition subsystem (1) comprises emitter (4) and receiving trap (5), and described emitter (4) and receiving trap (5) lay respectively at the two ends of net (14) top;
Described emitter (4) comprising: generating laser array (6), wireless module (8), controller (10), supply module (11);
Described receiving trap (5) comprising: laser sensor array (7), wireless module (9), controller (10), supply module (11), bluetooth module (12), display module (13);
Described generating laser array (6) has the laser head (16) that two rows equidistantly arrange, can launch two groups of parallel laser beam, wherein every group of laser beam is comprised of the multiple laser of equidistantly arranging in same plane, and the plane at described two groups of parallel laser beam places is all parallel to net (14);
Described laser sensor array (7) has the laser sensor (17) that two rows equidistantly arrange, for receiving two groups of parallel laser beam by generating laser array (6) transmitting, wherein each laser sensor (17) receives the signal of a corresponding laser head (16);
Described wireless module (9) is for sending wireless instructions to emitter (4);
Described wireless module (8) is for receiving the wireless instructions from receiving trap (5), to control the opening and closing of generating laser array (6);
Described supply module (11) comprises Alternating Current Power Supply module (18) and/or powered battery module (19), and described powered battery module (19) comprises rechargeable battery (20) and charging circuit (21);
Described bluetooth module (12) is for realizing the wireless data communication between ball speed acquisition subsystem (1) and the demonstration of ball speed, ADMINISTRATION SUBSYSTEM (2);
Described display module (13) is for the duty of display ball speed acquisition subsystem (1);
Described ball speed shows, ADMINISTRATION SUBSYSTEM (2) comprises intelligent terminal (3), and this intelligent terminal (3) has blue tooth communication function, can realize Speed display, historical record, highest record and achievement sharing function.
2. the shuttlecock velocity-measuring system of combination laser array according to claim 1 and intelligent terminal, is characterized in that: described display module (13) comprises LED light and/or display screen.
3. the shuttlecock velocity-measuring system of combination laser array according to claim 1 and intelligent terminal, it is characterized in that: described ball speed acquisition subsystem (1) and ball speed show, ADMINISTRATION SUBSYSTEM (2) can be used special-purpose A-frame to fix, and also can be fixed on net pillar.
4. according to the shuttlecock velocity-measuring system of the combination laser array described in any one in claim 1-3 and intelligent terminal, it is characterized in that: the equipment that described bluetooth module (12) can have blue tooth communication function with other carries out communication, this bluetooth module (12) is supported bluetooth 4.0 agreements backward compatible.
5. according to the shuttlecock velocity-measuring system of the combination laser array described in any one in claim 1-3 and intelligent terminal, it is characterized in that: described wireless module (8,9) is fixed frequency wireless communication module or infrared module.
6. according to the shuttlecock velocity-measuring system of the combination laser array described in any one in claim 1-3 and intelligent terminal, it is characterized in that: in every group of laser beam, the distance between every adjacent two bundle laser is less than the ball size of shuttlecock.
7. according to the shuttlecock velocity-measuring system of the combination laser array described in any one in claim 1-3 and intelligent terminal, it is characterized in that: described every group of laser head (16) and every group of laser sensor (17) are and are connected in parallel.
8. according to the shuttlecock velocity-measuring system of the combination laser array described in any one in claim 1-3 and intelligent terminal, it is characterized in that: described controller (10) is Programmable Logic Controller.
9. the shuttlecock velocity-measuring system of combination laser array according to claim 8 and intelligent terminal, is characterized in that: described Programmable Logic Controller has UART port, ADC detection port, and external interrupt port.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007284A (en) * | 2014-06-12 | 2014-08-27 | 掌握主动科技（北京）有限公司 | Laser-array and intelligent-terminal combined shuttlecock speed measuring system and method |
| CN109910954A (en) * | 2019-02-02 | 2019-06-21 | 卡斯柯信号有限公司 | Speed-position detection and section occupied detection system for superexpress train control system |
| CN110314359A (en) * | 2019-06-04 | 2019-10-11 | 五邑大学 | A kind of tennis speed measuring device |
| CN114534235A (en) * | 2022-03-23 | 2022-05-27 | 湖州师范学院 | Automatic ball serving training result judging and displaying device and using method thereof |
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2014
- 2014-06-12 CN CN201420312343.7U patent/CN204008691U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007284A (en) * | 2014-06-12 | 2014-08-27 | 掌握主动科技（北京）有限公司 | Laser-array and intelligent-terminal combined shuttlecock speed measuring system and method |
| CN109910954A (en) * | 2019-02-02 | 2019-06-21 | 卡斯柯信号有限公司 | Speed-position detection and section occupied detection system for superexpress train control system |
| CN109910954B (en) * | 2019-02-02 | 2021-08-03 | 卡斯柯信号有限公司 | Speed measurement positioning and interval occupation detection system for ultra-high speed train control system |
| CN110314359A (en) * | 2019-06-04 | 2019-10-11 | 五邑大学 | A kind of tennis speed measuring device |
| CN114534235A (en) * | 2022-03-23 | 2022-05-27 | 湖州师范学院 | Automatic ball serving training result judging and displaying device and using method thereof |
| CN114534235B (en) * | 2022-03-23 | 2022-10-25 | 湖州师范学院 | Automatic ball serving training result judging and displaying device and using method thereof |
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