CN104888442A - Tennis hitting point recording instrument - Google Patents
Tennis hitting point recording instrument Download PDFInfo
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- CN104888442A CN104888442A CN201510316499.1A CN201510316499A CN104888442A CN 104888442 A CN104888442 A CN 104888442A CN 201510316499 A CN201510316499 A CN 201510316499A CN 104888442 A CN104888442 A CN 104888442A
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Abstract
The invention discloses a tennis hitting point recording instrument. The tennis hitting point recording instrument comprises a power supply part, a signal acquisition part, a signal processing part, a single-chip microcomputer processing part and a liquid crystal display part. The power supply part, the single-chip microcomputer processing part and the liquid crystal display part respectively comprise one module; the signal acquisition part comprises four signal acquisition modules circuits of which are completely the same; and the signal processing part comprises four signal processing modules circuits of which are completely the same. Pickup sensors of the signal acquisition modules acquire tennis racket ball hitting sounds and convert sound signals into electrical signals to input the electrical signals to the signal processing modules; the signal processing modules perform amplification, filtering and shaping processing on the electrical signals converted from the sounds, and input the processed signals to a signal-chip microcomputer module; the signals after being processed by a single-chip microcomputer are input to a liquid crystal display module and are displayed on a liquid crystal screen; and the power supply module powers the signal acquisition part, the signal processing part and the single-chip microcomputer processing part. The tennis hitting point recording instrument has the advantages of high precision, high stability, low cost, easy installation and the like.
Description
Technical field
The present invention relates to a kind of recorder, especially relate to a kind of tennis ball hitting point recorder.
Background technology
In the tennis tournament of called optical imaging, receiving side is in passive position usually, therefore needs to change from passive to active on good tactics basis of receiving, thus wins the triumph of key ball.Very high requirement is all had in the circuit of ball, drop point, striking point on the ball etc. in actual combat, so a set of by judging tennis drop point to judge that the instrument of tennis ball hitting point arises at the historic moment, hawkeye system that Here it is (formally instant playback system by name).
The know-why of hawkeye system is also uncomplicated, but positioning precision is higher, and whole system is made up of high-speed camera, 4 computers and the some giant-screens that 8 or 10 resolution ratio is high.The operation principle of this system is: computer auxiliary under the solid space of whole competition area is separated into multiple take millimeter as the region of measurement unit, the master data of court approach shot flight path is caught from different perspectives by high-speed camera, then calculate through computer, carrying out three-dimensional reconstruction by analyzing the data drawn, finally utilizing instant imaging technique the movement line of tennis and drop point to be presented on giant-screen.
But as Current Domestic, hawkeye system judges that the unique technical approach of tennis ball hitting point but has larger limitation outward.Hawkeye is a set of simulation system, and its manufacturing technology does not also have a company to grasp in China at present.Only there is the captions manufacturing company that a few family is famous in the world, as the companies such as Omega have monopolized this technology jointly.Technical monopoly causes price fixing.It is reported, install the expense of hawkeye up to more than 100,000 dollars, and each court cost of use is weekly up to 40,000 dollars, this does not also comprise the expense for showing slow-motion giant-screen.So high use and maintenance cost make common player accurately be judged by technological means in daily training, record the striking point on the ball of tennis becomes very difficult, also receive larger restriction in tactical raising.
Therefore, develop a set of can substitute hawkeye system on tactical analysis and install, tennis ball hitting point positioning system that operating cost is cheap seems most important.
Summary of the invention
The object of this invention is to provide a tennis ball hitting based on sound localization principle point recorder, the striking point on the ball position that both sides sportsman bats at every turn can be recorded in the training process.
The technical solution adopted in the present invention is:
The present invention includes five parts: power unit, signals collecting part, signal processing, single-chip microcomputer processing section and liquid-crystal display section.Power unit comprises 1 power module; Signal acquisition part divides and comprises 4 the identical signal acquisition module 1 of circuit, signal acquisition module 2, signal acquisition module 3 and signal acquisition module 4; Signal processing comprises 4 the identical signal processing modules 1 of circuit, signal processing module 2, signal processing module 3 and signal processing modules 4; Single-chip microcomputer processing section comprises 1 single chip processing module; Liquid-crystal display section comprises 1 LCD MODULE.The sound pickup sensor of signal acquisition module gathers the sound of tennis racket batting, and voice signal is converted into signal of telecommunication input signal processing module; The signal of telecommunication that signal processing module transforms out sound amplifies, filtering, Shape correction, and by process after signal input one-chip computer module; Signal inputs LCD MODULE and in liquid crystal screen display after single-chip microcomputer process; Power module can be signals collecting part and single-chip microcomputer processing section provides+3.3V power supply, for signal processing provides+3.3V power supply and-3.3V power supply simultaneously.
Described power module comprises 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 11 electric capacity C11, the 12 electric capacity C12, the 13 electric capacity C13, the 14 electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, the second resistance R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chips W 1, second voltage stabilizing chips W 2; One end of 3 pins (input pin) of the first voltage stabilizing chips W 1 and the long pin (IN) of the first rectifier bridge D3, the 3rd electric capacity C3, the positive pole of the second electric capacity C2, the negative pole of the first diode D1 is connected; The negative pole of the second electric capacity C2, the equal ground connection of the other end of the 3rd electric capacity C3; 1 pin (ADJ) of the first voltage stabilizing chips W 1 is connected with one of them stiff end of the 3rd potentiometer R3, adjustable side, another stiff end ground connection of the 3rd potentiometer R3; One end of 2 pins (OUT) of the first voltage stabilizing chips W 1 and the positive pole of the first diode D1, the second resistance R2, the negative pole of the second diode D2, wherein one end of the 5th electric capacity C5, the positive pole of the 4th electric capacity C4 are connected; The other end of the second resistance R2 is connected with the positive pole of the adjustable side of the 3rd potentiometer R3, the second diode D2, the positive pole of the 6th electric capacity C6; The equal ground connection of negative pole of the negative pole of the 4th electric capacity C4, the other end of the 5th electric capacity C5, the 6th electric capacity C6; The positive pole that 2 pins (IN) of the second voltage stabilizing chips W 2 change D5 with the short pin (negative pole exports) of rectifier bridge, one end of the 12 electric capacity C12, the negative pole of the 11 electric capacity C11, the 5th diode is connected; The other end of the 12 electric capacity C12, the equal ground connection of positive pole of the 11 electric capacity C11; 1 pin (ADJ) of the second voltage stabilizing chips W 2 is connected with one of them stiff end of the 5th potentiometer R5, and 1 pin (ADJ) of W2 is also connected with the adjustable side of the 5th potentiometer R5 simultaneously; Another stiff end ground connection of 5th potentiometer R5; The positive pole of 3 pins (OUT) of the second voltage stabilizing chips W 2 and the negative pole of the 5th diode D5, the 4th diode D4, one end of the 6th resistance R6, one end of the 14 electric capacity C14, the negative pole of the 13 electric capacity C12 are connected; The other end of the 6th electric capacity R6 is connected with the adjustable side of the 5th potentiometer R5; The negative pole of the 4th diode D4 is connected with the negative pole of the 8th electric capacity C8; The positive pole of the 8th electric capacity C8, the other end of the 14 electric capacity C14, the equal ground connection of positive pole of the 13 electric capacity C13; First voltage stabilizing chips W 1 model is LM317; Second voltage stabilizing chips W 2 model is LM337.
Described signal acquisition module comprises the 19 electric capacity C19, the 11 resistance R11, the first Electret condenser microphone MK1; The positive pole of the first Electret condenser microphone MK1 is connected with the 19 electric capacity C19 with the 11 resistance R11 respectively, the other end of the 11 resistance R11 is connected with+3.3V power supply, 19 electric capacity C19 is connected with input the 13 resistance R13 of amplification filtering, and the negative pole of Electret condenser microphone MK1 is connected to the ground.
Described signal processing module comprises the 17 electric capacity C17, the 18 electric capacity C18, the 20 electric capacity C20, the 21 electric capacity C21, the 22 electric capacity C22, the 23 electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the first filter and amplification chip U1, the first comparable chip U2A part, two pin of the first filter and amplification chip U1 and the 9th resistance R9, 20 electric capacity C20 is connected, the other end of the 9th resistance R9 and 1 pin of filter and amplification chip U1, 17 electric capacity C17 is connected, the other end of the 20 electric capacity C20 and the 17 resistance R17, 13 resistance R13, 17 electric capacity C17 is connected, 13 resistance R13 is connected with the output C19 of signal acquisition module, the other end ground connection of the 17 resistance R17, 3 pin of the first filter and amplification chip U1 and 5 pin ground connection, 1 pin of the first filter and amplification chip U1 meets the 14 resistance R14, the other end of the 14 resistance R14 and the 15 resistance R15, 18 electric capacity C18, 21 electric capacity C21 is connected, 18 electric capacity C18 and the tenth resistance R10, 7 pin of the first filter and amplification chip U1 are connected, the other end of the 21 electric capacity C21 and the tenth resistance R10, six pin of filter and amplification chip are connected, the other end ground connection of the 15 resistance R15, output seven pin of filter and amplification chip is connected with signal shaping input the 22 electric capacity C22, the other end of the 22 electric capacity C22 is connected with the tripod of the first comparable chip U2A, two pin of the first comparable chip U2A are connected with the adjustable side of the 19 potentiometer R19, two stiff ends ground connection of 19 potentiometer R19, another meets+3.3V, the octal of the first comparable chip U2A meets power supply+3.3V, four pin connect power supply ground, output one pin of the first comparable chip U2A and the 12 resistance R12, 23 electric capacity C23 is connected, another termination power+3.3V of the 12 resistance R12, 23 electric capacity C23 and the 3rd plug receptacle P3, the adjustable side of the 18 potentiometer R18 is connected, two stiff ends of the 18 potentiometer R18 are connected respectively at power supply+3.3V and power supply, 3rd plug receptacle connects single-chip microcomputer PA0 pin.
Described single chip processing module comprises: the 4th resistance R4, the 7th resistance R7, the 8th resistance R8, the 16 resistance R16, the first resistance R1, the 7th electric capacity C7, the 9th electric capacity C9, the tenth electric capacity C10, the 14 electric capacity C14, the 15 electric capacity C15, the 16 electric capacity C16, the first crystal oscillator X1, the second crystal oscillator X2, the first button K1, singlechip chip U1; 6 pins of singlechip chip U1 connect+3.3V power supply; 8 pins of singlechip chip U1 draw Liang Ge branch, one is connected with one end of the 7th electric capacity C7, the other end ground connection of the 7th electric capacity C7, another is connected with one end of the first crystal oscillator X1, the other end of the first crystal oscillator X1 draws Liang Ge branch, and one is connected with one end of the 4th resistance R4, and the other end of the 4th resistance R4 is connected with 9 pins of singlechip chip U1, another is connected with one end of the 9th electric capacity C9, the other end ground connection of the 9th electric capacity C9; 23 pins of singlechip chip U1 draw Liang Ge branch, one is connected with one end of the tenth electric capacity C10, the other end ground connection of the tenth electric capacity C10, another is connected with one end of the second crystal oscillator X2, the other end of the second crystal oscillator X2 draws Liang Ge branch, and one is connected with one end of the 7th resistance R7, and the other end of the 7th resistance R7 is connected with 24 pins of singlechip chip U1, another is connected with one end of the 15 electric capacity C15, the other end ground connection of the 15 electric capacity C15; 25 pins of singlechip chip U1 draw three branches, first is connected with one end of the 16 electric capacity C16, the other end ground connection of the 16 electric capacity C16, second is connected with one end of the first button K1, the other end ground connection of the first button K1,3rd is connected with one end of the 8th resistance R8, another termination+3.3V power supply of the 8th resistance R8; 48 pins of singlechip chip U1 are connected with one end of the 16 resistance R16, the other end ground connection of the 16 resistance R16; 138 pins of singlechip chip U1 are connected with one end of the first resistance R1, the other end ground connection of the first resistance R1, and the power supply ground of singlechip chip U1 all connects with the ground of voltage-stabilized power supply; The model of described singlechip chip U1 is STM32F103ZET6.
Described LCD MODULE comprises the 44 resistance R44, the 49 resistance R49, liquid crystal J1; 1 pin of liquid crystal J1 connects+3.3V power supply; The 2 pin ground connection of liquid crystal J1; 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 pins of liquid crystal J1 are connected with 141,142,1,2,3,4,5,58,59,60,63,64,65,66,67,68 pins of singlechip chip C1 in single chip processing module successively; One end of 19 pins of liquid crystal J1 is connected with one end of the 44 resistance R44, another termination+3.3V power supply of the 44 resistance R44; 20,21,22 pins of liquid crystal J1 are connected with 82,85,86 pins of singlechip chip C1 in single chip processing module successively; 23 pins of liquid crystal J1 are connected with 25 pins of singlechip chip C1 in single chip processing module; 24 pins of liquid crystal J1 are unsettled not to be connect; 25,26,27 pins of liquid crystal J1 are connected with 42,44,43 pins of singlechip chip C1 in single chip processing module successively; 28 pins of liquid crystal J1 are unsettled not to be connect; 29 pins of liquid crystal J1 are connected with 41 pins of singlechip chip C1 in single chip processing module; 30 pins of liquid crystal J1 are unsettled not to be connect; One end of 31 pins of liquid crystal J1 is connected with one end of the 49 resistance R49, another termination+3.3V power supply of the 49 resistance R49; 32 pins of liquid crystal J1 are unsettled not to be connect; Described liquid crystal J1 is TFT3.2 cun of color screen.
The beneficial effect that the present invention has is: achieve the intuitive of instrument, high accuracy, simplification, low cost.Intuitive refers to the position that can demonstrate batting on liquid crystal display intuitively, directly can reflect that athletic batting is accustomed to; High accuracy refers to the present invention and adopts comprehensive sound localization scheme and time difference to calculate the algorithm of batter's box, and utilize the timer interruption of single-chip microcomputer to obtain the high-precision time difference, the batter's box data precision obtained is higher; It is simple that simplification refers to structure of the present invention, is convenient to install; Low cost refers to the present invention, and to compare hawkeye system cost very low, very little to site requirements, is applicable to small-sized training.
Accompanying drawing explanation
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 handling procedure flow chart
Fig. 8 is striking point on the ball position calculation schematic diagram
Detailed description of the invention
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, signals collecting part, signal processing, single-chip microcomputer processing section and liquid-crystal display section.Power unit comprises 1 power module; Signal acquisition part divides and comprises 4 the identical signal acquisition module 1 of circuit, signal acquisition module 2, signal acquisition module 3 and signal acquisition module 4; Signal processing comprises 4 the identical signal processing modules 1 of circuit, signal processing module 2, signal processing module 3 and signal processing modules 4; Single-chip microcomputer processing section comprises 1 single chip processing module; Liquid-crystal display section comprises 1 LCD MODULE.The sound pickup sensor of signal acquisition module gathers the sound of tennis racket batting, and voice signal is converted into signal of telecommunication input signal processing module; The signal of telecommunication that signal processing module transforms out sound amplifies, filtering, Shape correction, and by process after signal input one-chip computer module; Signal inputs LCD MODULE and in liquid crystal screen display after single-chip microcomputer process; Power module can be signals collecting part and single-chip microcomputer processing section provides+3.3V power supply, for signal processing provides+3.3V power supply and-3.3V power supply simultaneously.
As shown in Figure 2, described power module comprises the first power module providing+3.3V and the second source module providing-3.3V; Described power module comprises 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 11 electric capacity C11, the 12 electric capacity C12, the 13 electric capacity C13, the 14 electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, the second resistance R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chips W 1, second voltage stabilizing chips W 2; One end of 3 pins (input pin) of the first voltage stabilizing chips W 1 and the long pin (IN) of the first rectifier bridge D3, the 3rd electric capacity C3, the positive pole of the second electric capacity C2, the negative pole of the first diode D1 is connected; The negative pole of the second electric capacity C2, the equal ground connection of the other end of the 3rd electric capacity C3; 1 pin (ADJ) of the first voltage stabilizing chips W 1 is connected with one of them stiff end of the 3rd potentiometer R3, adjustable side, another stiff end ground connection of the 3rd potentiometer R3; One end of 2 pins (OUT) of the first voltage stabilizing chips W 1 and the positive pole of the first diode D1, the second resistance R2, the negative pole of the second diode D2, wherein one end of the 5th electric capacity C5, the positive pole of the 4th electric capacity C4 are connected; The other end of the second resistance R2 is connected with the positive pole of the adjustable side of the 3rd potentiometer R3, the second diode D2, the positive pole of the 6th electric capacity C6; The equal ground connection of negative pole of the negative pole of the 4th electric capacity C4, the other end of the 5th electric capacity C5, the 6th electric capacity C6; The positive pole that 2 pins (IN) of the second voltage stabilizing chips W 2 change D5 with the short pin (negative pole exports) of rectifier bridge, one end of the 12 electric capacity C12, the negative pole of the 11 electric capacity C11, the 5th diode is connected; The other end of the 12 electric capacity C12, the equal ground connection of positive pole of the 11 electric capacity C11; 1 pin (ADJ) of the second voltage stabilizing chips W 2 is connected with one of them stiff end of the 5th potentiometer R5, and 1 pin (ADJ) of W2 is also connected with the adjustable side of the 5th potentiometer R5 simultaneously; Another stiff end ground connection of 5th potentiometer R5; The positive pole of 3 pins (OUT) of the second voltage stabilizing chips W 2 and the negative pole of the 5th diode D5, the 4th diode D4, one end of the 6th resistance R6, one end of the 14 electric capacity C14, the negative pole of the 13 electric capacity C12 are connected; The other end of the 6th electric capacity R6 is connected with the adjustable side of the 5th potentiometer R5; The negative pole of the 4th diode D4 is connected with the negative pole of the 8th electric capacity C8; The positive pole of the 8th electric capacity C8, the other end of the 14 electric capacity C14, the equal ground connection of positive pole of the 13 electric capacity C13; First voltage stabilizing chips W 1 model is LM317; Second voltage stabilizing chips W 2 model is LM337.
As shown in Figure 3, signal acquisition module comprises the 19 electric capacity C19, the 11 resistance R11, the first Electret condenser microphone MK1; The positive pole of the first Electret condenser microphone MK1 is connected with the 19 electric capacity C19 with the 11 resistance R11 respectively, the other end of the 11 resistance R11 is connected with+3.3V power supply, 19 electric capacity C19 is connected with input the 13 resistance R13 of amplification filtering, and the negative pole of Electret condenser microphone MK1 is connected to the ground.
As shown in Figure 4, signal processing module comprises the 17 electric capacity C17, the 18 electric capacity C18, the 20 electric capacity C20, the 21 electric capacity C21, the 22 electric capacity C22, the 23 electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the first filter and amplification chip U1, the first comparable chip U2A part, two pin of the first filter and amplification chip U1 and the 9th resistance R9, 20 electric capacity C20 is connected, the other end of the 9th resistance R9 and 1 pin of filter and amplification chip U1, 17 electric capacity C17 is connected, the other end of the 20 electric capacity C20 and the 17 resistance R17, 13 resistance R13, 17 electric capacity C17 is connected, 13 resistance R13 is connected with the output C19 of signal acquisition module, the other end ground connection of the 17 resistance R17, 3 pin of the first filter and amplification chip U1 and 5 pin ground connection, 1 pin of the first filter and amplification chip U1 meets the 14 resistance R14, the other end of the 14 resistance R14 and the 15 resistance R15, 18 electric capacity C18, 21 electric capacity C21 is connected, 18 electric capacity C18 and the tenth resistance R10, 7 pin of the first filter and amplification chip U1 are connected, the other end of the 21 electric capacity C21 and the tenth resistance R10, six pin of filter and amplification chip are connected, the other end ground connection of the 15 resistance R15, output seven pin of filter and amplification chip is connected with signal shaping input the 22 electric capacity C22, the other end of the 22 electric capacity C22 is connected with the tripod of the first comparable chip U2A, two pin of the first comparable chip U2A are connected with the adjustable side of the 19 potentiometer R19, two stiff ends ground connection of 19 potentiometer R19, another meets+3.3V, the octal of the first comparable chip U2A meets power supply+3.3V, four pin connect power supply ground, output one pin of the first comparable chip U2A and the 12 resistance R12, 23 electric capacity C23 is connected, another termination power+3.3V of the 12 resistance R12, 23 electric capacity C23 and the 3rd plug receptacle P3, the adjustable side of the 18 potentiometer R18 is connected, two stiff ends of the 18 potentiometer R18 are connected respectively at power supply+3.3V and power supply, 3rd plug receptacle connects single-chip microcomputer PA0 pin.
As shown in Figure 5,23 pins that single chip processing module comprises singlechip chip U1 draw Liang Ge branch, one is connected with one end of the tenth electric capacity C10, the other end ground connection of the tenth electric capacity C10, another is connected with one end of the second crystal oscillator X2, the other end of the second crystal oscillator X2 draws Liang Ge branch, one is connected with one end of the 7th resistance R7, the other end of the 7th resistance R7 is connected with 24 pins of singlechip chip U1, another is connected with one end of the 15 electric capacity C15, the other end ground connection of the 15 electric capacity C15; 25 pins of singlechip chip U1 draw three branches, first is connected with one end of the 16 electric capacity C16, the other end ground connection of the 16 electric capacity C16, second is connected with one end of the first button K1, the other end ground connection of the first button K1,3rd is connected with one end of the 8th resistance R8, another termination+3.3V power supply of the 8th resistance R8; 48 pins of singlechip chip U1 are connected with one end of the 16 resistance R16, the other end ground connection of the 16 resistance R16; 138 pins of singlechip chip U1 are connected with one end of the first resistance R1, the other end ground connection of the first resistance R1, and the power supply ground of singlechip chip U1 all connects with the ground of voltage-stabilized power supply; The model of described singlechip chip U1 is STM32F103ZET6.
As shown in Figure 6, LCD MODULE comprises the 44 resistance R44, the 49 resistance R49, liquid crystal J1; 1 pin of liquid crystal J1 connects+3.3V power supply; The 2 pin ground connection of liquid crystal J1; 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 pins of liquid crystal J1 are connected with 141,142,1,2,3,4,5,58,59,60,63,64,65,66,67,68 pins of singlechip chip C1 in single chip processing module successively; One end of 19 pins of liquid crystal J1 is connected with one end of the 44 resistance R44, another termination+3.3V power supply of the 44 resistance R44; 20,21,22 pins of liquid crystal J1 are connected with 82,85,86 pins of singlechip chip C1 in single chip processing module successively; 23 pins of liquid crystal J1 are connected with 25 pins of singlechip chip C1 in single chip processing module; 24 pins of liquid crystal J1 are unsettled not to be connect; 25,26,27 pins of liquid crystal J1 are connected with 42,44,43 pins of singlechip chip C1 in single chip processing module successively; 28 pins of liquid crystal J1 are unsettled not to be connect; 29 pins of liquid crystal J1 are connected with 41 pins of singlechip chip C1 in single chip processing module; 30 pins of liquid crystal J1 are unsettled not to be connect; One end of 31 pins of liquid crystal J1 is connected with one end of the 49 resistance R49, another termination+3.3V power supply of the 49 resistance R49; 32 pins of liquid crystal J1 are unsettled not to be connect; Described liquid crystal J1 is TFT3.2 cun of color screen;
As shown in Figure 7, program first carries out pin initialization to single-chip microcomputer, external interrupt initializes, system clock initializes, timer initializes, liquid crystal initializes, judge whether to receive rising edge signal, when receiving rising edge signal, judge the sequence of signal, when signal is first rising edge, starts timer and start timing, when signal is second rising edge, read and recording timer value m
1, when signal is the 3rd rising edge, read and recording timer value m
2, when signal is the 4th rising edge, read and recording timer value m
3; Judge whether to receive four signals, if receive, then to timer value m
1, m
2, m
3convert, by m
1take advantage of with timer timing cycle T-phase, m
2with m
1absolute difference and timer timing cycle T-phase is taken advantage of, m
3with m
1absolute difference and timer timing cycle T-phase multiplied to striking point on the ball sound transmission to the second, the 3rd, the 4th signal acquisition point time-parameters t
1, t
2, t
3; Then to time-parameters t
1, t
2, t
3convert, by time-parameters t
1, t
2, t
3retransmit at air with sound respectively and broadcast speed v
0be multiplied and obtain the distance parameter L of striking point on the ball and second, the 3rd, the 4th signal acquisition point
1, L
2, L
3; Then will apart from parameter L
1, L
2, L
3substitute into pattern function computing, obtain coordinate value (X, Y); Finally, record is carried out to coordinate value (X, Y), and be presented on liquid crystal display;
As shown in Figure 8, first single-chip microcomputer judges first sequence number receiving the signal acquisition point of batting sound by the sequence number of the respective interrupt mouth arranged, and is assumed to be No. 1 and first receives, start timing, obtain time-parameters t
1, t
2, t
3; v
0for the velocity of sound, so L
1=v
0t
1, L
2=v
0t
2, L
3=v
0t
3.Known standard outdoor Tennis Court is 10.97m × 23.77m, and therefore limit 1-2 is long is n=23.77m for m=10.97m, limit 2-3 are long.Then the coordinate computing formula of this striking point on the ball is as follows:
Claims (1)
1. tennis ball hitting point recorder, comprises power unit, signals collecting part, signal processing, single-chip microcomputer processing section and liquid-crystal display section, it is characterized in that:
Power unit comprises a power module; Signal acquisition part divides and comprises four identical signal acquisition module of circuit; Signal processing comprises four identical signal processing modules of circuit; Single-chip microcomputer processing section comprises a single chip processing module; Liquid-crystal display section comprises a LCD MODULE; The sound pickup sensor of signal acquisition module gathers the sound of tennis racket batting, and voice signal is converted into signal of telecommunication input signal processing module; The signal of telecommunication that signal processing module transforms out sound amplifies, filtering, Shape correction, and by process after signal input one-chip computer module; Signal inputs LCD MODULE and in liquid crystal screen display after single-chip microcomputer process; Power module can be signals collecting part and single-chip microcomputer processing section provides+3.3V power supply, for signal processing provides+3.3V power supply and-3.3V power supply simultaneously; Described signal acquisition module is arranged on the surrounding in court, gathers in real time to striking point on the ball sound, determines striking point on the ball and respective position, thus determine the position of striking point on the ball in whole court according to the sound difference time;
Described power module comprises 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 11 electric capacity C11, the 12 electric capacity C12, the 13 electric capacity C13, the 14 electric capacity C14, the first diode D1, the second diode D2, the 4th diode D4, the 5th diode D5, the second resistance R2, the 6th resistance R6, the 3rd potentiometer R3, the 5th potentiometer R5, the first voltage stabilizing chips W 1, second voltage stabilizing chips W 2; One end of 3 pins of the first voltage stabilizing chips W 1 and the long pin of the first rectifier bridge D3, the 3rd electric capacity C3, the positive pole of the second electric capacity C2, the negative pole of the first diode D1 is connected; The negative pole of the second electric capacity C2, the equal ground connection of the other end of the 3rd electric capacity C3; 1 pin of the first voltage stabilizing chips W 1 is connected with one of them stiff end of the 3rd potentiometer R3, adjustable side, another stiff end ground connection of the 3rd potentiometer R3; One end of 2 pins of the first voltage stabilizing chips W 1 and the positive pole of the first diode D1, the second resistance R2, the negative pole of the second diode D2, wherein one end of the 5th electric capacity C5, the positive pole of the 4th electric capacity C4 are connected; The other end of the second resistance R2 is connected with the positive pole of the adjustable side of the 3rd potentiometer R3, the second diode D2, the positive pole of the 6th electric capacity C6; The equal ground connection of negative pole of the negative pole of the 4th electric capacity C4, the other end of the 5th electric capacity C5, the 6th electric capacity C6; The positive pole that D5 is changed in one end of 2 pins of the second voltage stabilizing chips W 2 and the short pin of rectifier bridge, the 12 electric capacity C12, the negative pole of the 11 electric capacity C11, the 5th diode is connected; The other end of the 12 electric capacity C12, the equal ground connection of positive pole of the 11 electric capacity C11; 1 pin of the second voltage stabilizing chips W 2 is connected with one of them stiff end of the 5th potentiometer R5, and 1 pin of W2 is also connected with the adjustable side of the 5th potentiometer R5 simultaneously; Another stiff end ground connection of 5th potentiometer R5; The positive pole of 3 pins of the second voltage stabilizing chips W 2 and the negative pole of the 5th diode D5, the 4th diode D4, one end of the 6th resistance R6, one end of the 14 electric capacity C14, the negative pole of the 13 electric capacity C12 are connected; The other end of the 6th electric capacity R6 is connected with the adjustable side of the 5th potentiometer R5; The negative pole of the 4th diode D4 is connected with the negative pole of the 8th electric capacity C8; The positive pole of the 8th electric capacity C8, the other end of the 14 electric capacity C14, the equal ground connection of positive pole of the 13 electric capacity C13; First voltage stabilizing chips W 1 model is LM317; Second voltage stabilizing chips W 2 model is LM337;
Described signal acquisition module comprises the 19 electric capacity C19, the 11 resistance R11, the first Electret condenser microphone MK1; The positive pole of the first Electret condenser microphone MK1 is connected with the 19 electric capacity C19 with the 11 resistance R11 respectively, the other end of the 11 resistance R11 is connected with+3.3V power supply, 19 electric capacity C19 is connected with input the 13 resistance R13 of amplification filtering, and the negative pole of Electret condenser microphone MK1 is connected to the ground;
Described signal processing module comprises the 17 electric capacity C17, the 18 electric capacity C18, the 20 electric capacity C20, the 21 electric capacity C21, the 22 electric capacity C22, the 23 electric capacity C23, the 9th resistance R9, the tenth resistance R10, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the first filter and amplification chip U1, the first comparable chip U2A part, two pin of the first filter and amplification chip U1 and the 9th resistance R9, 20 electric capacity C20 is connected, the other end of the 9th resistance R9 and 1 pin of filter and amplification chip U1, 17 electric capacity C17 is connected, the other end of the 20 electric capacity C20 and the 17 resistance R17, 13 resistance R13, 17 electric capacity C17 is connected, 13 resistance R13 is connected with the output C19 of signal acquisition module, the other end ground connection of the 17 resistance R17, 3 pin of the first filter and amplification chip U1 and 5 pin ground connection, 1 pin of the first filter and amplification chip U1 meets the 14 resistance R14, the other end of the 14 resistance R14 and the 15 resistance R15, 18 electric capacity C18, 21 electric capacity C21 is connected, 18 electric capacity C18 and the tenth resistance R10, 7 pin of the first filter and amplification chip U1 are connected, the other end of the 21 electric capacity C21 and the tenth resistance R10, six pin of filter and amplification chip are connected, the other end ground connection of the 15 resistance R15, output seven pin of filter and amplification chip is connected with signal shaping input the 22 electric capacity C22, the other end of the 22 electric capacity C22 is connected with the tripod of the first comparable chip U2A, two pin of the first comparable chip U2A are connected with the adjustable side of the 19 potentiometer R19, two stiff ends ground connection of 19 potentiometer R19, another meets+3.3V, the octal of the first comparable chip U2A meets power supply+3.3V, four pin connect power supply ground, output one pin of the first comparable chip U2A and the 12 resistance R12, 23 electric capacity C23 is connected, another termination power+3.3V of the 12 resistance R12, 23 electric capacity C23 and the 3rd plug receptacle P3, the adjustable side of the 18 potentiometer R18 is connected, two stiff ends of the 18 potentiometer R18 are connected respectively at power supply+3.3V and power supply, 3rd plug receptacle connects single-chip microcomputer PA0 pin,
Described single chip processing module comprises the 4th resistance R4, the 7th resistance R7, the 8th resistance R8, the 16 resistance R16, the first resistance R1, the 7th electric capacity C7, the 9th electric capacity C9, the tenth electric capacity C10, the 14 electric capacity C14, the 15 electric capacity C15, the 16 electric capacity C16, the first crystal oscillator X1, the second crystal oscillator X2, the first button K1, singlechip chip U1; 6 pins of singlechip chip U1 connect+3.3V power supply; 8 pins of singlechip chip U1 draw Liang Ge branch, one is connected with one end of the 7th electric capacity C7, the other end ground connection of the 7th electric capacity C7, another is connected with one end of the first crystal oscillator X1, the other end of the first crystal oscillator X1 draws Liang Ge branch, and one is connected with one end of the 4th resistance R4, and the other end of the 4th resistance R4 is connected with 9 pins of singlechip chip U1, another is connected with one end of the 9th electric capacity C9, the other end ground connection of the 9th electric capacity C9; 23 pins of singlechip chip U1 draw Liang Ge branch, one is connected with one end of the tenth electric capacity C10, the other end ground connection of the tenth electric capacity C10, another is connected with one end of the second crystal oscillator X2, the other end of the second crystal oscillator X2 draws Liang Ge branch, and one is connected with one end of the 7th resistance R7, and the other end of the 7th resistance R7 is connected with 24 pins of singlechip chip U1, another is connected with one end of the 15 electric capacity C15, the other end ground connection of the 15 electric capacity C15; 25 pins of singlechip chip U1 draw three branches, first is connected with one end of the 16 electric capacity C16, the other end ground connection of the 16 electric capacity C16, second is connected with one end of the first button K1, the other end ground connection of the first button K1,3rd is connected with one end of the 8th resistance R8, another termination+3.3V power supply of the 8th resistance R8; 48 pins of singlechip chip U1 are connected with one end of the 16 resistance R16, the other end ground connection of the 16 resistance R16; 138 pins of singlechip chip U1 are connected with one end of the first resistance R1, the other end ground connection of the first resistance R1, and the power supply ground of singlechip chip U1 all connects with the ground of voltage-stabilized power supply; The model of described singlechip chip U1 is STM32F103ZET6;
Described LCD MODULE comprises the 44 resistance R44, the 49 resistance R49, liquid crystal J1; 1 pin of liquid crystal J1 connects+3.3V power supply; The 2 pin ground connection of liquid crystal J1; 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 pins of liquid crystal J1 are connected with 141,142,1,2,3,4,5,58,59,60,63,64,65,66,67,68 pins of singlechip chip C1 in single chip processing module successively; One end of 19 pins of liquid crystal J1 is connected with one end of the 44 resistance R44, another termination+3.3V power supply of the 44 resistance R44; 20,21,22 pins of liquid crystal J1 are connected with 82,85,86 pins of singlechip chip C1 in single chip processing module successively; 23 pins of liquid crystal J1 are connected with 25 pins of singlechip chip C1 in single chip processing module; 24 pins of liquid crystal J1 are unsettled not to be connect; 25,26,27 pins of liquid crystal J1 are connected with 42,44,43 pins of singlechip chip C1 in single chip processing module successively; 28 pins of liquid crystal J1 are unsettled not to be connect; 29 pins of liquid crystal J1 are connected with 41 pins of singlechip chip C1 in single chip processing module; 30 pins of liquid crystal J1 are unsettled not to be connect; One end of 31 pins of liquid crystal J1 is connected with one end of the 49 resistance R49, another termination+3.3V power supply of the 49 resistance R49; 32 pins of liquid crystal J1 are unsettled not to be connect; Described liquid crystal J1 is TFT3.2 cun of color screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510316499.1A CN104888442B (en) | 2015-06-10 | 2015-06-10 | Tennis ball hitting point recorder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510316499.1A CN104888442B (en) | 2015-06-10 | 2015-06-10 | Tennis ball hitting point recorder |
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| CN104888442A true CN104888442A (en) | 2015-09-09 |
| CN104888442B CN104888442B (en) | 2017-10-03 |
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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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106799025A (en) * | 2017-01-17 | 2017-06-06 | 覃刚君 | Batting detection method, device, equipment and intelligent terminal |
| CN107094232A (en) * | 2017-02-13 | 2017-08-25 | 孙景芝 | Panoramic video direct broadcast service device |
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| 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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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5059944A (en) * | 1989-08-02 | 1991-10-22 | Carmona Pedro M | Tennis court boundary sensor |
| CN1256163A (en) * | 1999-12-03 | 2000-06-14 | 陈少元 | Simulative golf game system |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106799025A (en) * | 2017-01-17 | 2017-06-06 | 覃刚君 | Batting detection method, device, equipment and intelligent terminal |
| CN106799025B (en) * | 2017-01-17 | 2020-03-27 | 覃刚君 | Ball hitting detection method, device, equipment and intelligent terminal |
| CN107094232A (en) * | 2017-02-13 | 2017-08-25 | 孙景芝 | Panoramic video direct broadcast service device |
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|---|---|
| CN104888442B (en) | 2017-10-03 |
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