CN104888442B - Tennis ball hitting point recorder - Google Patents
Tennis ball hitting point recorder Download PDFInfo
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- CN104888442B CN104888442B CN201510316499.1A CN201510316499A CN104888442B CN 104888442 B CN104888442 B CN 104888442B CN 201510316499 A CN201510316499 A CN 201510316499A CN 104888442 B CN104888442 B CN 104888442B
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Abstract
The invention discloses a kind of tennis ball hitting point recorder.The present invention includes power unit, signal acquisition part, signal processing, single-chip microcomputer process part and liquid-crystal display section.Power unit, single-chip microcomputer process part and liquid-crystal display section include 1 module；Signal acquisition part point includes 4 identical signal acquisition modules of circuit；Signal processing includes 4 identical signal processing modules of circuit.The sound pickup sensor collection tennis racket sound of shots of signal acquisition module, and voice signal is converted into electric signal input signal processing module；Signal processing module is amplified to the electric signal that sound is converted to, filtered, Shape correction, and the signal after processing is inputted into one-chip computer module；Signal inputs LCD MODULE and in liquid crystal screen display after being handled through single-chip microcomputer；Power module is that signal acquisition part, signal processing and single-chip microcomputer process part are powered.The present invention has the advantages that high accuracy, high stability, low cost and is easily installed.
Description
Technical field
The present invention relates to a kind of recorder, more particularly, to a kind of tennis ball hitting point recorder.
Background technology
In well known tennis tournament, receiving side is generally in passive position, it is therefore desirable to received in good
Changed from passive to active on the basis of tactics, so as to win the triumph of key ball.For the circuit, drop point, striking point on the ball of ball in actual combat
In terms of have very high requirement, so it is a set of by judging tennis drop point to judge the instrument of tennis ball hitting point to meet the tendency of and
It is raw, here it is hawkeye system (formal entitled instant playback system).
The technical principle of hawkeye system is simultaneously uncomplicated, but positioning precision is higher, and whole system is high by 8 or 10 resolution ratio
High-speed camera, 4 computers and some giant-screens composition.The operation principle of the system is：Whole under the auxiliary of computer
The solid space of competition area is separated into multiple regions using millimeter as units of measurement, is caught from different perspectives by high-speed camera
The master data of court approach shot flight path is caught, is then calculated by computer, the data that analysis is drawn carry out three-dimensional reconstruction,
Finally the movement line and drop point of tennis are included on giant-screen using instant imaging technique.
But hawkeye system as judge outside Current Domestic the unique technical approach of tennis ball hitting point but have it is larger
Limitation.Hawkeye is a set of simulation system, and its manufacturing technology will appreciate that in also no a company of China at present.In the world
Only several famous captions manufacturing companies, such as Omega company has monopolized this technology jointly.Technical monopoly causes valency
Lattice are monopolized.It is reported that, install the costly up to more than 100,000 dollars of hawkeye, and the cost of use of each court weekly is up to 40,000
Dollar, this does not include the expense for being used for showing slow-motion giant-screen also.So high use and maintenance cost causes common choosing
Hand accurately judges that, recorded that the striking point on the ball of tennis becomes very difficult in daily training by technological means, in tactics
Raising also receive larger limitation.
Therefore, develop it is a set of can be substituted on tactical analysis hawkeye system and install, the tennis that operating cost is cheap is hit
Ball point positioning system seems most important.
The content of the invention
, can be in training process it is an object of the invention to provide a tennis ball hitting point recorder based on sound positioning principle
The striking point on the ball position that middle record both sides sportsman bats every time.
The technical solution adopted in the present invention is：
The present invention includes five parts：Power unit, signal acquisition part, signal processing, single-chip microcomputer process part
And liquid-crystal display section.Power unit includes 1 power module；Signal acquisition part point includes the identical letter of 4 circuits
Number acquisition module 1, signal acquisition module 2, signal acquisition module 3 and signal acquisition module 4；Signal processing includes 4 electricity
The identical signal processing module 1 in road, signal processing module 2, signal processing module 3 and signal processing module 4；At single-chip microcomputer
Reason part includes 1 single chip processing module；Liquid-crystal display section includes 1 LCD MODULE.Signal acquisition module is picked up
The sound that sound sensor collection tennis is flicked, and voice signal is converted into electric signal input signal processing module；At signal
Reason module is amplified to the electric signal that sound is converted to, filtered, Shape correction, and the signal after processing is inputted into single-chip microcomputer mould
Block；Signal inputs LCD MODULE and in liquid crystal screen display after being handled through single-chip microcomputer；Power module can be signal acquisition part
Divide and single-chip microcomputer process part offer+3.3V power supplys, be signal processing offer+3.3V power supplys and -3.3V power supplys simultaneously.
The power module includes the first plug receptacle P1, the first rectifier bridge D3, the second electric capacity C2, the 3rd electric capacity C3, the 4th
Electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 8th electric capacity C8, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electricity
Hold C13, the 14th electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, second
Resistance R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chip W1, the second voltage stabilizing chip W2；The
One voltage stabilizing chip W1 3 pins (input pin) and the first rectifier bridge D3 long pin (IN), the 3rd electric capacity C3 one end, the second electric capacity
C2 positive pole, the first diode D1 negative pole is connected；Second electric capacity C2 negative pole, the 3rd electric capacity C3 other end is grounded；The
One voltage stabilizing chip W1 1 pin (ADJ) is connected with the 3rd potentiometer R3 one of fixing end, adjustable side, the 3rd potentiometer
R3 another fixing end ground connection；First voltage stabilizing chip W1 2 pins (OUT) and the first diode D1 positive pole, second resistance R2
One end, the second diode D2 negative pole, the 5th electric capacity C5 wherein one end, the 4th electric capacity C4 positive pole be connected；Second resistance
The R2 other end is connected with the 3rd potentiometer R3 adjustable side, the second diode D2 positive pole, the 6th electric capacity C6 positive pole；4th
Electric capacity C4 negative pole, the 5th electric capacity C5 other end, the 6th electric capacity C6 negative pole are grounded；Second voltage stabilizing chip W2 2 pins
(IN) with the short pin (negative pole output) of rectifier bridge, the 12nd electric capacity C12 one end, the 11st electric capacity C11 negative pole, the five or two pole
The positive pole that pipe changes D5 is connected；The 12nd electric capacity C12 other end, the 11st electric capacity C11 positive pole is grounded；Second voltage stabilizing chip
W2 1 pin (ADJ) is connected with the 5th potentiometer R5 one of fixing end, while W2 1 pin (ADJ) is also electric with the 5th
Position device R5 adjustable side is connected；5th potentiometer R5 another fixing end ground connection；Second voltage stabilizing chip W2 3 pins (OUT) with
5th diode D5 negative pole, the 4th diode D4 positive pole, the 6th resistance R6 one end, the 14th electric capacity C14 one end,
13 electric capacity C12 negative pole is connected；The 6th electric capacity R6 other end is connected with the 5th potentiometer R5 adjustable side；4th diode
D4 negative pole is connected with the 8th electric capacity C8 negative pole；8th electric capacity C8 positive pole, the 14th electric capacity C14 other end, the 13rd
Electric capacity C13 positive pole is grounded；First voltage stabilizing chip W1 models are LM317；Second voltage stabilizing chip W2 models are LM337.
Described signal acquisition module includes the 19th electric capacity C19, the 11st resistance R11, the first Electret condenser microphone MK1；
First Electret condenser microphone MK1 positive pole is connected with the 11st resistance R11 and the 19th electric capacity C19 respectively, the 11st resistance R11's
The other end is connected with+3.3V power supplys, and the 19th electric capacity C19 is connected with the resistance R13 of input the 13rd of amplification filtering, electret
Microphone MK1 negative pole is connected to the ground.
Described signal processing module includes the 17th electric capacity C17, the 18th electric capacity C18, the 20th electric capacity C20, second
11 electric capacity C21, the 22nd electric capacity C22, the 23rd electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12nd resistance
R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 17th resistance R17, the 18th resistance R18,
19 resistance R19, the first filter and amplification chip U1, the first comparable chip U2A parts；First filter and amplification chip U1 two pin with
9th resistance R9, the 20th electric capacity C20 are connected, the 9th resistance R9 other end and filter and amplification chip U1 1 pin, the 17th electricity
Hold C17 to be connected, the 20th electric capacity the C20 other end and the 17th resistance R17, the 13rd resistance R13, the 17th electric capacity C17 phases
Even, the 13rd resistance R13 is connected with the output end C19 of signal acquisition module, the 17th resistance R17 other end ground connection, first
Filter and amplification chip U1 3 pin and 5 pin ground connection, the first filter and amplification chip U1 1 pin meet the 14th resistance R14, the 14th electricity
The resistance R14 other end is connected with the 15th resistance R15, the 18th electric capacity C18, the 21st electric capacity C21, the 18th electric capacity C18
It is connected with the tenth resistance R10, the first filter and amplification chip U1 7 pin, the 21st electric capacity the C21 other end and the tenth resistance
R10, six pin of filter and amplification chip are connected, the 15th resistance R15 other end ground connection, the pin of output end seven of filter and amplification chip
It is connected with the electric capacity C22 of signal shaping input the 22nd, the 22nd electric capacity C22 other end and the first comparable chip U2A
Three pin be connected, the first comparable chip U2A two pin are connected with the 19th potentiometer R19 adjustable side, the 19th potentiometer R19
The ground connection of two fixing ends one, another meets+3.3V, and the first comparable chip U2A octal meets power supply+3.3V, four pin and connects electricity
Source, the first comparable chip U2A pin of output end one is connected with the 12nd resistance R12, the 23rd electric capacity C23, the 12nd electricity
Hinder R12 another termination power+3.3V, the 23rd electric capacity C23 and the 3rd plug receptacle P3, the 18th potentiometer R18 regulation
End is connected, and the 18th potentiometer R18 two fixing ends are connected respectively at power supply+3.3V with power supply, the 3rd plug receptacle order
Piece machine PA0 pins.
Described single chip processing module includes：4th resistance R4, the 7th resistance R7, the 8th resistance R8, the 16th resistance
R16, first resistor R1, the 7th electric capacity C7, the 9th electric capacity C9, the tenth electric capacity C10, the 14th electric capacity C14, the 15th electric capacity C15,
16th electric capacity C16, the first crystal oscillator X1, the second crystal oscillator X2, the first button K1, singlechip chip U1；Singlechip chip U1 6 pipes
Pin connects+3.3V power supplys；Singlechip chip U1 8 pins draw Liang Ge branches, and one is connected with the 7th electric capacity C7 one end, and the 7th
Electric capacity C7 other end ground connection, another is connected with the first crystal oscillator X1 one end, and the first crystal oscillator X1 other end draws two points
Branch, one is connected with the 4th resistance R4 one end, and the 4th resistance R4 other end is connected with singlechip chip U1 9 pins, separately
One is connected with the 9th electric capacity C9 one end, the 9th electric capacity C9 other end ground connection；Singlechip chip U1 23 pins draw two
Individual branch, one is connected with the tenth electric capacity C10 one end, the tenth electric capacity C10 other end ground connection, another and the second crystal oscillator X2
One end be connected, the second crystal oscillator X2 other end draws Liang Ge branches, and one is connected with the 7th resistance R7 one end, the 7th resistance
The R7 other end is connected with singlechip chip U1 24 pins, and another electric capacity C15 of Zhi Yu 15 one end is connected, the 15th electricity
Hold C15 other end ground connection；Singlechip chip U1 25 pins draw three branches, first and the one of the 16th electric capacity C16
End is connected, the 16th electric capacity C16 other end ground connection, and second is connected with the first button K1 one end, and the first button K1's is another
One end is grounded, and the 3rd is connected with the 8th resistance R8 one end, the 8th resistance R8 another termination+3.3V power supplys；Monolithic movement
Piece U1 48 pins are connected with the 16th resistance R16 one end, the 16th resistance R16 other end ground connection；Singlechip chip U1
138 pins be connected with first resistor R1 one end, first resistor R1 other end ground connection, singlechip chip U1 power supply it is complete
All connect with the ground of voltage-stabilized power supply；Described singlechip chip U1 model STM32F103ZET6.
Described LCD MODULE includes the 44th resistance R44, the 49th resistance R49, liquid crystal J1；Liquid crystal J1's
1 pin connects+3.3V power supplys；Liquid crystal J1 2 pins ground connection；Liquid crystal J1 3,4,5,6,7,8,9,10,11,12,13,14,15,
16th, 17,18 pins successively with singlechip chip C1 in single chip processing module 141,142,1,2,3,4,5,58,59,60,
63rd, 64,65,66,67,68 pins are connected；One end of liquid crystal J1 19 pins is connected with the 44th resistance R44 one end, the
44 resistance R44 another termination+3.3V power supplys；Liquid crystal J1 20,21,22 pins successively with it is single in single chip processing module
Piece movement piece C1 82,85,86 pins are connected；Liquid crystal J1 23 pins and 25 of singlechip chip C1 in single chip processing module
Pin is connected；Liquid crystal J1 24 pins do not connect vacantly；Liquid crystal J1 25,26,27 pins successively with it is single in single chip processing module
Piece movement piece C1 42,44,43 pins are connected；Liquid crystal J1 28 pins do not connect vacantly；At liquid crystal J1 29 pins and single-chip microcomputer
41 pins for managing singlechip chip C1 in module are connected；Liquid crystal J1 30 pins do not connect vacantly；One end of liquid crystal J1 31 pins
It is connected with the 49th resistance R49 one end, the 49th resistance R49 another termination+3.3V power supplys；Liquid crystal J1 32 pins
Do not connect vacantly；Described liquid crystal J1 is TFT3.2 cuns of color screens.
The invention has the advantages that：Realize intuitive, high accuracy, simplification, the low cost of instrument.Intuitive
Refer to intuitively showing the position of batting on liquid crystal display, can directly reflect the batting custom of sportsman；
High accuracy refers to that the present invention calculates the algorithm of batter's box using comprehensive sound targeting scheme and time difference, utilizes monolithic
It is higher that the timer interruption of machine obtains the high-precision batter's box data precision time difference, obtained；Simplification refers to this hair
It is bright simple in construction, it is easily installed；It is very low that low cost refers to that the present invention compares hawkeye system cost, to site requirements very little, fits
For small-sized training.
Brief description of the drawings
Fig. 1 is circuit structure diagram of the present invention；
Fig. 2 is the hardware circuit diagram of power module；
Fig. 3 is the hardware circuit diagram of signal acquisition module；
Fig. 4 is the hardware circuit diagram of signal processing module；
Fig. 5 is the hardware circuit diagram of single chip processing module；
Fig. 6 is the hardware circuit diagram of LCD MODULE.
Fig. 7 is single-chip microcomputer processing routine flow chart
Fig. 8 is that striking point on the ball position calculates schematic diagram
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, the present invention includes five parts：Power unit, signal acquisition part, signal processing, monolithic
Machine process part and liquid-crystal display section.Power unit includes 1 power module；It is complete that signal acquisition part point includes 4 circuits
Exactly the same signal acquisition module 1, signal acquisition module 2, signal acquisition module 3 and signal acquisition module 4；Signal processing
Including the identical signal processing module 1 of 4 circuits, signal processing module 2, signal processing module 3 and signal processing module
4；Single-chip microcomputer process part includes 1 single chip processing module；Liquid-crystal display section includes 1 LCD MODULE.Signal is adopted
The sound that the sound pickup sensor collection tennis of collection module is flicked, and voice signal is converted into electric signal input signal processing mould
Block；Signal processing module is amplified to the electric signal that sound is converted to, filtered, Shape correction, and the signal after processing is defeated
Enter one-chip computer module；Signal inputs LCD MODULE and in liquid crystal screen display after being handled through single-chip microcomputer；Power module can be
Signal acquisition part and single-chip microcomputer process part offer+3.3V power supplys, be signal processing simultaneously offer+3.3V power supplys and-
3.3V power supply.
As shown in Fig. 2 the power module includes offer+3.3V the first power module and offer -3.3V the second electricity
Source module；The power module includes the first plug receptacle P1, the first rectifier bridge D3, the second electric capacity C2, the 3rd electric capacity C3, the 4th electricity
Hold C4, the 5th electric capacity C5, the 6th electric capacity C6, the 8th electric capacity C8, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electric capacity
C13, the 14th electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, the second electricity
Hinder R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chip W1, the second voltage stabilizing chip W2；First
Voltage stabilizing chip W1 3 pins (input pin) and the first rectifier bridge D3 long pin (IN), the 3rd electric capacity C3 one end, the second electric capacity C2
Positive pole, the first diode D1 negative pole is connected；Second electric capacity C2 negative pole, the 3rd electric capacity C3 other end is grounded；First
Voltage stabilizing chip W1 1 pin (ADJ) is connected with the 3rd potentiometer R3 one of fixing end, adjustable side, the 3rd potentiometer R3
Another fixing end ground connection；First voltage stabilizing chip W1 2 pins (OUT) and the first diode D1 positive pole, second resistance R2
One end, the second diode D2 negative pole, the 5th electric capacity C5 wherein one end, the 4th electric capacity C4 positive pole are connected；Second resistance R2
The other end be connected with the 3rd potentiometer R3 adjustable side, the second diode D2 positive pole, the 6th electric capacity C6 positive pole；4th electricity
Negative pole, the 5th electric capacity C5 other end, the 6th electric capacity C6 negative pole for holding C4 are grounded；Second voltage stabilizing chip W2 2 pins
(IN) with the short pin (negative pole output) of rectifier bridge, the 12nd electric capacity C12 one end, the 11st electric capacity C11 negative pole, the five or two pole
The positive pole that pipe changes D5 is connected；The 12nd electric capacity C12 other end, the 11st electric capacity C11 positive pole is grounded；Second voltage stabilizing chip
W2 1 pin (ADJ) is connected with the 5th potentiometer R5 one of fixing end, while W2 1 pin (ADJ) is also electric with the 5th
Position device R5 adjustable side is connected；5th potentiometer R5 another fixing end ground connection；Second voltage stabilizing chip W2 3 pins (OUT) with
5th diode D5 negative pole, the 4th diode D4 positive pole, the 6th resistance R6 one end, the 14th electric capacity C14 one end,
13 electric capacity C12 negative pole is connected；The 6th electric capacity R6 other end is connected with the 5th potentiometer R5 adjustable side；4th diode
D4 negative pole is connected with the 8th electric capacity C8 negative pole；8th electric capacity C8 positive pole, the 14th electric capacity C14 other end, the 13rd
Electric capacity C13 positive pole is grounded；First voltage stabilizing chip W1 models are LM317；Second voltage stabilizing chip W2 models are LM337.
As shown in figure 3, signal acquisition module includes the 19th electric capacity C19, the 11st resistance R11, the first Electret condenser microphone
MK1；First Electret condenser microphone MK1 positive pole is connected with the 11st resistance R11 and the 19th electric capacity C19 respectively, the 11st resistance
The R11 other end is connected with+3.3V power supplys, and the 19th electric capacity C19 is connected with the resistance R13 of input the 13rd of amplification filtering,
Electret condenser microphone MK1 negative pole is connected to the ground.
As shown in figure 4, signal processing module include the 17th electric capacity C17, the 18th electric capacity C18, the 20th electric capacity C20,
21st electric capacity C21, the 22nd electric capacity C22, the 23rd electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12nd
Resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 17th resistance R17, the 18th resistance
R18, the 19th resistance R19, the first filter and amplification chip U1, the first comparable chip U2A parts；First filter and amplification chip U1's
Two pin are connected with the 9th resistance R9, the 20th electric capacity C20, the 9th resistance R9 other end and filter and amplification chip U1 1 pin, the
17 electric capacity C17 are connected, the 20th electric capacity the C20 other end and the 17th resistance R17, the 13rd resistance R13, the 17th electric capacity
C17 is connected, and the 13rd resistance R13 is connected with the output end C19 of signal acquisition module, the 17th resistance R17 other end ground connection,
First filter and amplification chip U1 3 pin and 5 pin ground connection, the first filter and amplification chip U1 1 pin meet the 14th resistance R14, the tenth
The four resistance R14 other end is connected with the 15th resistance R15, the 18th electric capacity C18, the 21st electric capacity C21, the 18th electric capacity
C18 is connected with the tenth resistance R10, the first filter and amplification chip U1 7 pin, the 21st electric capacity C21 other end and the tenth electricity
Hinder R10, six pin of filter and amplification chip are connected, the 15th resistance R15 other end ground connection, the output end seven of filter and amplification chip
Pin is connected with the electric capacity C22 of signal shaping input the 22nd, the 22nd electric capacity the C22 other end and the first comparable chip
U2A three pin are connected, and the first comparable chip U2A two pin are connected with the 19th potentiometer R19 adjustable side, the 19th potentiometer
R19 two fixing ends, one ground connection, another meets+3.3V, and the first comparable chip U2A octal meets power supply+3.3V, four pin and connect
Power supply, the first comparable chip U2A pin of output end one is connected with the 12nd resistance R12, the 23rd electric capacity C23, and the 12nd
Resistance R12 another termination power+3.3V, the 23rd electric capacity C23 and the 3rd plug receptacle P3, the 18th potentiometer R18 tune
Save end to be connected, the 18th potentiometer R18 two fixing ends are connected respectively at power supply+3.3V with power supply, and the 3rd plug receptacle connects
Single-chip microcomputer PA0 pins.
As shown in figure 5,23 pins of single chip processing module including singlechip chip U1 draw Liang Ge branches, one and the
Ten electric capacity C10 one end is connected, the tenth electric capacity C10 other end ground connection, and another is connected with the second crystal oscillator X2 one end, and second
The crystal oscillator X2 other end draws Liang Ge branches, and one is connected with the 7th resistance R7 one end, the 7th resistance the R7 other end and list
Piece movement piece U1 24 pins are connected, and another electric capacity C15 of Zhi Yu 15 one end is connected, the 15th electric capacity C15 other end
Ground connection；Singlechip chip U1 25 pins draw three branches, and first is connected with the 16th electric capacity C16 one end, and the 16th
Electric capacity C16 other end ground connection, second is connected with the first button K1 one end, the first button K1 other end ground connection, the 3rd
The resistance R8 of Zhi Yu eight one end is connected, the 8th resistance R8 another termination+3.3V power supplys；Singlechip chip U1 48 pins with
16th resistance R16 one end is connected, the 16th resistance R16 other end ground connection；Singlechip chip U1 138 pins and first
Resistance R1 one end is connected, first resistor R1 other end ground connection, singlechip chip U1 power supply all with voltage-stabilized power supply
Ground connects；Described singlechip chip U1 model STM32F103ZET6.
As shown in fig. 6, LCD MODULE includes the 44th resistance R44, the 49th resistance R49, liquid crystal J1；Liquid crystal
J1 1 pin connects+3.3V power supplys；Liquid crystal J1 2 pins ground connection；Liquid crystal J1 3,4,5,6,7,8,9,10,11,12,13,14,
15th, 16,17,18 pins successively with singlechip chip C1 in single chip processing module 141,142,1,2,3,4,5,58,59,
60th, 63,64,65,66,67,68 pins are connected；One end of liquid crystal J1 19 pins is connected with the 44th resistance R44 one end,
44th resistance R44 another termination+3.3V power supplys；Liquid crystal J1 20,21,22 pins successively with single chip processing module
Singlechip chip C1 82,85,86 pins are connected；Liquid crystal J1 23 pins and singlechip chip C1 in single chip processing module
25 pins are connected；Liquid crystal J1 24 pins do not connect vacantly；Liquid crystal J1 25,26,27 pins successively with single chip processing module
Singlechip chip C1 42,44,43 pins are connected；Liquid crystal J1 28 pins do not connect vacantly；Liquid crystal J1 29 pins and single-chip microcomputer
Singlechip chip C1 41 pins are connected in processing module；Liquid crystal J1 30 pins do not connect vacantly；The one of liquid crystal J1 31 pins
End is connected with the 49th resistance R49 one end, the 49th resistance R49 another termination+3.3V power supplys；Liquid crystal J1 32 pipes
Pin does not connect vacantly；Described liquid crystal J1 is TFT3.2 cuns of color screens；
As shown in fig. 7, program is first carried out to single-chip microcomputer, pin initialization, external interrupt are initialized, system clock is initialized,
Timer initialization, initialization of 12864 liquid crystal, judge whether to receive rising edge signal, when receiving rising edge signal, judge letter
Number sequence, when signal be first rising edge when, start timer start timing, when signal be second rising edge when, read
Take and recording timer value m1, when signal is the 3rd rising edge, read and recording timer value m2, when signal is the 4th
During rising edge, read and recording timer value m3；Judge whether to have received four signals, if reception is complete, to timer value m1、
m2、m3Converted, by m1Multiply with timer timing cycle T-phase, m2With m1Absolute difference and timer timing cycle T-phase
Multiply, m3With m1Absolute difference and timer timing cycle T-phase it is multiplied to striking point on the ball sound transmission to second, the 3rd, the
Four signal acquisition point time-parameters t1、t2、t3；Then to time-parameters t1、t2、t3Converted, by time-parameters t1、t2、t3
Respectively with sound in air weight spread speed v0It is multiplied and obtains striking point on the ball and second, the 3rd, the 4th signal acquisition point
Apart from parameter L1、L2、L3；Then will be apart from parameter L1、L2、L3Pattern function computing is substituted into, coordinate value (X, Y) is obtained；Finally, it is right
Coordinate value (X, Y) is recorded, and is shown on liquid crystal display；
As shown in figure 8, single-chip microcomputer judges that first receives batting by the sequence number of the respective interrupt mouthful of setting first
The sequence number of the signal acquisition point of sound, it is assumed that first received for No. 1, starts timing, obtains time-parameters t1、t2、t3；v0For the velocity of sound,
So L1=v0t1, L2=v0t2, L3=v0t3.Known standard outdoor Tennis Court is 10.97m × 23.77m, therefore a length of m=of side 1-2
The a length of n=23.77m of 10.97m, side 2-3.Then the coordinate calculation formula of the striking point on the ball is as follows：
Claims (1)
1. tennis ball hitting point recorder, including power unit, signal acquisition part, signal processing, single-chip microcomputer process part
And liquid-crystal display section, it is characterised in that：
Power unit includes a power module；Signal acquisition part point includes four identical signal acquisition modules of circuit；
Signal processing includes four identical signal processing modules of circuit；Single-chip microcomputer process part is included at a single-chip microcomputer
Manage module；Liquid-crystal display section includes a LCD MODULE；The sound pickup sensor collection tennis slap of signal acquisition module
The sound of ball, and voice signal is converted into electric signal input signal processing module；Signal processing module is converted to sound
Electric signal is amplified, filtered, Shape correction, and the signal after processing is inputted into one-chip computer module；Signal is handled through single-chip microcomputer
LCD MODULE is inputted afterwards and in liquid crystal screen display；Power module can be that signal acquisition part and single-chip microcomputer process part are carried
It is signal processing offer+3.3V power supplys and -3.3V power supplys simultaneously for+3.3V power supplys；The signal acquisition module is arranged on
The surrounding in court, is acquired to striking point on the ball sound in real time, striking point on the ball and respective position is determined according to the sound poor time, so that really
Determine position of the striking point on the ball in whole court；Specifically：
Single-chip microcomputer judges whether to receive rising edge signal, when receiving rising edge signal, judges the sequence of signal, works as signal
During for first rising edge, start timer and start timing, when signal is second rising edge, read and recording timer valuem 1, when signal is the 3rd rising edge, read and recording timer valuem 2, when signal is the 4th rising edge, reads and remember
Record timer valuem 3；Judge whether to have received four signals, if reception is complete, to timer valuem 1、m 2、m 3Converted, willm 1
With timer timing cycleTBe multiplied,m 2Withm 1Absolute difference and timer timing cycleTBe multiplied,m 3Withm 1Difference it is absolute
Value and timer timing cycleTMultiplication obtains striking point on the ball sound transmission to second, the 3rd, the 4th signal acquisition point time
Parametert 1、t 2、t 3；Then to time-parameterst 1、t 2、t 3Converted, by time-parameterst 1、t 2、t 3Respectively with sound in air weight
Spread speedv 0Be multiplied obtain striking point on the ball and second, the 3rd, the 4th signal acquisition point apart from parameterL 1、L 2、L 3；So
After will be apart from parameterL 1、L 2、L 3Pattern function computing is substituted into, coordinate value is obtained；Finally, coordinate value is recorded, and be shown in
On liquid crystal display；
The power module includes the first plug receptacle P1, the first rectifier bridge D3, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity
C4, the 5th electric capacity C5, the 6th electric capacity C6, the 8th electric capacity C8, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electric capacity
C13, the 14th electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, the second electricity
Hinder R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chip W1, the second voltage stabilizing chip W2；First
Voltage stabilizing chip W1 3 pins and the first rectifier bridge D3 long pin, the 3rd electric capacity C3 one end, the second electric capacity C2 positive pole, first
Diode D1 negative pole is connected；Second electric capacity C2 negative pole, the 3rd electric capacity C3 other end is grounded；First voltage stabilizing chip W1's
1 pin and the 3rd potentiometer R3 one of fixing end, adjustable side are connected, the 3rd potentiometer R3 another fixing end ground connection；
First voltage stabilizing chip W1 2 pins and the first diode D1 positive pole, second resistance R2 one end, the second diode D2 it is negative
Pole, the 5th electric capacity C5 wherein one end, the 4th electric capacity C4 positive pole are connected；The second resistance R2 other end and the 3rd potentiometer R3
Adjustable side, the second diode D2 positive pole, the 6th electric capacity C6 positive pole be connected；4th electric capacity C4 negative pole, the 5th electric capacity C5
The other end, the 6th electric capacity C6 negative pole is grounded；Second voltage stabilizing chip W2 2 pins and the short pin of rectifier bridge, the 12nd electricity
Hold C12 one end, the 11st electric capacity C11 negative pole, the 5th diode and change D5 positive pole and be connected；12nd electric capacity C12's is another
End, the 11st electric capacity C11 positive pole are grounded；One of them of second voltage stabilizing chip W2 1 pin and the 5th potentiometer R5 are consolidated
Fixed end is connected, while adjustable side of W2 1 pin also with the 5th potentiometer R5 is connected；5th potentiometer R5 another fixed termination
Ground；Second voltage stabilizing chip W2 3 pins and the 5th diode D5 negative pole, the 4th diode D4 positive pole, the 6th resistance R6
One end, the 14th electric capacity C14 one end, the 13rd electric capacity C12 negative pole are connected；The 6th electric capacity R6 other end and the 5th current potential
Device R5 adjustable side is connected；4th diode D4 negative pole is connected with the 8th electric capacity C8 negative pole；8th electric capacity C8 positive pole,
The 14 electric capacity C14 other end, the 13rd electric capacity C13 positive pole is grounded；First voltage stabilizing chip W1 models are LM317；Second
Voltage stabilizing chip W2 models are LM337；
Described signal acquisition module includes the 19th electric capacity C19, the 11st resistance R11, the first Electret condenser microphone MK1；First
Electret condenser microphone MK1 positive pole is connected with the 11st resistance R11 and the 19th electric capacity C19 respectively, and the 11st resistance R11's is another
End is connected with+3.3V power supplys, and the 19th electric capacity C19 is connected with the resistance R13 of input the 13rd of amplification filtering, Electret condenser microphone
MK1 negative pole is connected to the ground；
Described signal processing module includes the 17th electric capacity C17, the 18th electric capacity C18, the 20th electric capacity C20, the 21st
Electric capacity C21, the 22nd electric capacity C22, the 23rd electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12nd resistance R12,
13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 17th resistance R17, the 18th resistance R18, the 19th
Resistance R19, the first filter and amplification chip U1, the first comparable chip U2A parts；First filter and amplification chip U1 two pin and the 9th
Resistance R9, the 20th electric capacity C20 are connected, the 9th resistance R9 other end and filter and amplification chip U1 1 pin, the 17th electric capacity
C17 is connected, and the 20th electric capacity C20 other end is connected with the 17th resistance R17, the 13rd resistance R13, the 17th electric capacity C17,
13rd resistance R13 is connected with the output end C19 of signal acquisition module, the 17th resistance R17 other end ground connection, the first filtering
Amplification chip U1 3 pin and 5 pin ground connection, the first filter and amplification chip U1 1 pin meet the 14th resistance R14, the 14th resistance R14
The other end be connected with the 15th resistance R15, the 18th electric capacity C18, the 21st electric capacity C21, the 18th electric capacity C18 and the tenth
Resistance R10, the first filter and amplification chip U1 7 pin are connected, the 21st electric capacity the C21 other end and the tenth resistance R10, filtering
Six pin of amplification chip are connected, and the 15th resistance R15 other end ground connection, the pin of output end seven and signal of filter and amplification chip is whole
The electric capacity C22 of shape input the 22nd is connected, three pin phases of the 22nd electric capacity C22 other end and the first comparable chip U2A
Even, the first comparable chip U2A two pin are connected with the 19th potentiometer R19 adjustable side, and two of the 19th potentiometer R19 are solid
The ground connection of fixed end one, another meets+3.3V, and the first comparable chip U2A octal connects power supply+3.3V, four pin with connecing power supply, and first
The comparable chip U2A pin of output end one is connected with the 12nd resistance R12, the 23rd electric capacity C23, and the 12nd resistance R12's is another
One termination power+3.3V, the 23rd electric capacity C23 are connected with the 3rd plug receptacle P3, the 18th potentiometer R18 adjustable side, and
18 potentiometer R18 two fixing ends are connected respectively at power supply+3.3V with power supply, and the 3rd plug receptacle connects single-chip microcomputer PA0 pipes
Pin；
Described single chip processing module includes the 4th resistance R4, the 7th resistance R7, the 8th resistance R8, the 16th resistance R16, the
One resistance R1, the 7th electric capacity C7, the 9th electric capacity C9, the tenth electric capacity C10, the 14th electric capacity C14, the 15th electric capacity C15, the 16th
Electric capacity C16, the first crystal oscillator X1, the second crystal oscillator X2, the first button K1, singlechip chip U1；Singlechip chip U1 6 pins connect+
3.3V power supply；Singlechip chip U1 8 pins draw Liang Ge branches, and one is connected with the 7th electric capacity C7 one end, the 7th electric capacity
C7 other end ground connection, another is connected with the first crystal oscillator X1 one end, and the first crystal oscillator X1 other end draws Liang Ge branches, one
The resistance R4 of Zhi Yu tetra- one end is connected, and the 4th resistance R4 other end is connected with singlechip chip U1 9 pins, another and
9th electric capacity C9 one end is connected, the 9th electric capacity C9 other end ground connection；Singlechip chip U1 23 pins draw Liang Ge branches,
One is connected with the tenth electric capacity C10 one end, the tenth electric capacity C10 other end ground connection, another with the second crystal oscillator X2 one end
It is connected, the second crystal oscillator X2 other end draws Liang Ge branches, and one is connected with the 7th resistance R7 one end, and the 7th resistance R7's is another
One end is connected with singlechip chip U1 24 pins, and another electric capacity C15 of Zhi Yu 15 one end is connected, the 15th electric capacity C15
The other end ground connection；Singlechip chip U1 25 pins draw three branches, first with the 16th electric capacity C16 one end phase
Even, the 16th electric capacity C16 other end ground connection, second is connected with the first button K1 one end, the first button K1 other end
Ground connection, the 3rd is connected with the 8th resistance R8 one end, the 8th resistance R8 another termination+3.3V power supplys；Singlechip chip U1
48 pins be connected with the 16th resistance R16 one end, the 16th resistance R16 other end ground connection；The 138 of singlechip chip U1
Pin is connected with first resistor R1 one end, first resistor R1 other end ground connection, singlechip chip U1 power supply all with
The ground of voltage-stabilized power supply connects；Described singlechip chip U1 model STM32F103ZET6；
Described LCD MODULE includes the 44th resistance R44, the 49th resistance R49, liquid crystal J1；Liquid crystal J1 1 pipe
Pin connects+3.3V power supplys；Liquid crystal J1 2 pins ground connection；Liquid crystal J1 3,4,5,6,7,8,9,10,11,12,13,14,15,16,
17th, 18 pins successively with singlechip chip C1 in single chip processing module 141,142,1,2,3,4,5,58,59,60,63,
64th, 65,66,67,68 pins are connected；One end of liquid crystal J1 19 pins is connected with the 44th resistance R44 one end, and the 40th
Four resistance R44 another termination+3.3V power supplys；Liquid crystal J1 20,21,22 pins successively with single-chip microcomputer in single chip processing module
Chip C1 82,85,86 pins are connected；25 pins of liquid crystal J1 23 pins and singlechip chip C1 in single chip processing module
It is connected；Liquid crystal J1 24 pins do not connect vacantly；Liquid crystal J1 25,26,27 pins successively with single-chip microcomputer in single chip processing module
Chip C1 42,44,43 pins are connected；Liquid crystal J1 28 pins do not connect vacantly；Liquid crystal J1 29 pins handle mould with single-chip microcomputer
Singlechip chip C1 41 pins are connected in block；Liquid crystal J1 30 pins do not connect vacantly；One end of liquid crystal J1 31 pins and the
49 resistance R49 one end is connected, the 49th resistance R49 another termination+3.3V power supplys；Liquid crystal J1 32 pins are hanging
Do not connect；Described liquid crystal J1 is TFT3.2 cuns of color screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316499.1A CN104888442B (en) | 2015-06-10 | 2015-06-10 | Tennis ball hitting point recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316499.1A CN104888442B (en) | 2015-06-10 | 2015-06-10 | Tennis ball hitting point recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104888442A CN104888442A (en) | 2015-09-09 |
| CN104888442B true CN104888442B (en) | 2017-10-03 |
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ID=54021660
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510316499.1A Expired - Fee Related CN104888442B (en) | 2015-06-10 | 2015-06-10 | Tennis ball hitting point recorder |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106799025B (en) * | 2017-01-17 | 2020-03-27 | 覃刚君 | Ball hitting detection method, device, equipment and intelligent terminal |
| CN107734223B (en) * | 2017-02-13 | 2018-06-12 | 南京锐驰鼎欣科技股份有限公司 | Positioning device based on image identification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059944A (en) * | 1989-08-02 | 1991-10-22 | Carmona Pedro M | Tennis court boundary sensor |
| CN202376720U (en) * | 2011-12-19 | 2012-08-15 | 贾串玲 | Tennis line judging system |
| CN202682732U (en) * | 2012-07-04 | 2013-01-23 | 内蒙古民族大学 | Table tennis singles table counter |
| CN103926562A (en) * | 2014-04-04 | 2014-07-16 | 中国计量学院 | Tennis tactic analysis instrument based on sound localization principle |
| CN204734936U (en) * | 2015-06-10 | 2015-11-04 | 中国计量学院 | Tennis striking point on ball record appearance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151854C (en) * | 1999-12-03 | 2004-06-02 | 北京康体休闲设备开发中心 | Simulative golf game system |
-
2015
- 2015-06-10 CN CN201510316499.1A patent/CN104888442B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059944A (en) * | 1989-08-02 | 1991-10-22 | Carmona Pedro M | Tennis court boundary sensor |
| CN202376720U (en) * | 2011-12-19 | 2012-08-15 | 贾串玲 | Tennis line judging system |
| CN202682732U (en) * | 2012-07-04 | 2013-01-23 | 内蒙古民族大学 | Table tennis singles table counter |
| CN103926562A (en) * | 2014-04-04 | 2014-07-16 | 中国计量学院 | Tennis tactic analysis instrument based on sound localization principle |
| CN204734936U (en) * | 2015-06-10 | 2015-11-04 | 中国计量学院 | Tennis striking point on ball record appearance |
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| Publication number | Publication date |
|---|---|
| CN104888442A (en) | 2015-09-09 |
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Granted publication date: 20171003 |