CN109847316A - Based on the detection method in parallel to the sphere moving situation for penetrating matrix - Google Patents
Based on the detection method in parallel to the sphere moving situation for penetrating matrix Download PDFInfo
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- CN109847316A CN109847316A CN201811627926.8A CN201811627926A CN109847316A CN 109847316 A CN109847316 A CN 109847316A CN 201811627926 A CN201811627926 A CN 201811627926A CN 109847316 A CN109847316 A CN 109847316A
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Abstract
The invention discloses a kind of detection methods based in parallel to the sphere moving situation for penetrating matrix comprising: S1, noncontacting proximity sensor is arranged in matrix is penetrated, sphere is enabled to move to penetrating in matrix；S2, start to sample with predeterminated frequency to when penetrating matrix when sphere enters, the time is denoted as initial time at this time, it is detached to the sampling time for penetrating matrix using sphere as the end time, sampling total time is calculated, the sampling total time is the difference of end time and initial time；S3, the total degree for obtaining sampling and every time sampling when it is corresponding to the number penetrating noncontacting proximity sensor in matrix and being blocked；S4, the moving situation that sphere is judged according to the sampling total time, the total degree of sampling and the number that is blocked.The present invention improves the accuracy of ball test result.
Description
Technical field
The present invention relates to moving body state detection method fields more particularly to a kind of based in parallel to the sphere for penetrating matrix
The detection method of moving situation.
Background technique
Sport is a kind of Social Culture phenomenon of complexity, it is raw according to human body using body and intellection as basic means
It is regular that long development, technical ability are formed and function improves etc., reach promote full development, improve physical fitness and overall education level,
Build up health with improve locomitivity, mode of making the life better with improve the quality of living it is a kind of conscious, purposeful, organized
Social activities.In recent years, with the continuous improvement to physical training attention degree, the sports curriculum that colleges and universities open up is also more various
Change, for example vollyball is exactly wherein common one of course；Training of setting up is an essential practice in vollyball, in course knot
Volleyball front forearm pass test would generally be carried out when beam to every learner, usually judges vollyball by teacher's naked eyes when volleyball front forearm pass is tested
The position of arrival, or sensor is blocked to judge vollyball test result using vollyball, but will appear vollyball is that top is rigid
Sensor and the not position where the center arrival sensor of vollyball are blocked, well so as to cause the knot of test result inaccuracy
Fruit also will appear vollyball and enter test zone from the external world and block sensor, untrue so as to cause test result.So needing
Want a kind of detection method of better sphere moving situation.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of based in parallel to penetrating matrix
The detection method of sphere moving situation, the detection method improve the accuracy of ball test result.
An object of the present invention adopts the following technical scheme that realization:
A kind of detection method based in parallel to the sphere moving situation for penetrating matrix comprising following steps:
S1, noncontacting proximity sensor is arranged in matrix is penetrated, sphere is enabled to move to penetrating in matrix；
S2, start to sample with predeterminated frequency to when penetrating matrix when sphere enters, the time is denoted as initial time at this time, with sphere
Being detached to the sampling time for penetrating matrix is the end time, and sampling total time is calculated, and the sampling total time is the end time
And the difference of initial time；
S3, the total degree for obtaining sampling and every time sampling when corresponding be blocked to penetrating noncontacting proximity sensor in matrix
Number；
S4, the moving situation that sphere is judged according to the sampling total time, the total degree of sampling and the number that is blocked.
Further, the emitting head positioning setting of the noncontacting proximity sensor receives head positioning and is set to the same side
The other side of relative transmission head.
Further, the spacing between the adjacent noncontacting proximity sensor in the same side is 15mm.
Further, the emitting head to the noncontacting proximity sensor and reception head all add hood or carry out buried
Processing.
Further, the predeterminated frequency is 1ms.
Further, the moving situation of sphere has following four: I. sphere is completely by penetrating matrix and doing upper elevator
Dynamic, II. sphere is completely by penetrating matrix and not up to put down to penetrating matrix doing falling motion, III. sphere in ball centre
Begin to do that falling motion, IV. sphere passes through in ball centre but sphere when penetrating matrix not entirely through to beginning to do when face
Falling motion.
Further, when sampling threshold value of the total time greater than setting, judge that sphere situation is IV. sphere in ball centre
By but sphere not entirely through to beginning to do falling motion when penetrating matrix.
Further, if the most corresponding sampling numbers of the number being blocked are located in first interval, judge ball
Body situation is that III. sphere begins to do falling motion when ball centre is not up to the plane for penetrating matrix；If being blocked
When the at most corresponding sampling numbers of number are located in second interval, then judge that sphere situation is II. sphere completely by penetrating square
Battle array and doing falling motion；If the at most corresponding sampling number of the number being blocked is located in 3rd interval, ball is judged
Body situation is I. sphere completely by penetrating matrix and doing ascending motion；The sampling number is successive suitable according to the sampling time
Sequence is arranged, and the sampling of initial time is denoted as to be sampled for the first time, and the sampling of end time is denoted as n-th sampling；Described first
Section isSecond interval be (3rd interval is ), wherein n is sampling total degree,It is to be rounded downwards to n/2；For to n ×
10% rounds up.
Further, the moving situation of sphere is judged using C language principal function.
Compared with prior art, the beneficial effects of the present invention are: noncontacting proximity sensor is arranged in penetrating matrix, according to
Sphere contact is blocked to the length of sampling total time, the total degree of sampling and each sampling of penetrating matrix with disengaging non-contact
The number of formula sensor judges the moving situation of sphere；This method combines three moving situations because usually judging sphere, keeps away
Exempt from only to judge sphere situation by sensor sensing, improve the accuracy of ball test result, this method is widely used in
Ball relevant exercise test equipment, but sphere moving situation can be judged to avoid traditional artificial naked eyes and caused by test result
Error, and this method is mainly using noncontacting proximity sensor, so that this method is easy to use, it is low in cost.
Detailed description of the invention
Fig. 1 is a preferred embodiment of the present invention the stream based on the detection method in parallel to the sphere moving situation for penetrating matrix
Cheng Tu.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
A preferred embodiment of the present invention discloses a kind of detection method based in parallel to the sphere moving situation for penetrating matrix,
It please refers to shown in Fig. 1 comprising following steps:
S1, noncontacting proximity sensor (can be the noncontacting proximity sensors such as infrared or laser-correlation) horizontal equidistant arrangement
Matrix is penetrated in pairs, and the emitting head positioning setting of noncontacting proximity sensor receives head positioning and be set to relative transmission head to the same side
The other side, and to emitting head and receive head and all add hood or carry out buried processing, then enable sphere to penetrating matrix
In do free movement；
By taking vollyball as an example, the sphere circumference of vollyball is generally 65~67cm, between a diameter of 20~22cm；Assuming that vollyball
The minimum 20cm of diameter；In order to which accurately description sphere is by the whole process for penetrating matrix as far as possible, when sphere passes through to penetrating
Its opposite type sensor triggered at least needs to reach 10 when matrix, considers that the time of sphere edge-triggered is shorter and sensor
Time delay at least needs to reach 12 sensors in diameter, is essentially that sensor arranging density is The more the better, in view of biography
Sensor also has its physical size, and when the arrangement spacing of sensor is 15mm, the sensor that can be triggered in vollyball diameter is at least
13, it is more conform with practical application request.It therefore is every 15mm mono- to the arranging density for the noncontacting proximity sensor for penetrating matrix.
And the length and width for penetrating matrix can be determined according to condition frees such as actual test rule and places.
S2, when sphere enters, to when penetrating matrix, with predeterminated frequency, (in the present embodiment, predeterminated frequency is preferably 1ms, i.e., often
1ms is primary to sensor sample) start to sample, the time is denoted as initial time at this time, when being detached from sphere to the sampling for penetrating matrix
Between be the end time, be calculated sampling total time, the sampling total time for end time and initial time difference；
For complete motion conditions of description sphere as far as possible, the response frequency of noncontacting proximity sensor and its data is adopted
Sample frequency cannot be too low.The height for penetrating 10m above matrix (is needed to examine when more than certain altitude assuming that sphere can rise to
Consider air drag), according toSpeed when it is by matrix known to (ignoring vollyball diameter, g is acceleration of gravity) is about
For 14m/s, contact matrix and the time interval for being detached from matrix plane are about 14.29ms；It is at least needed in this time interval
Sampling 10 times, therefore 1ms cannot be below to the minimum unit in the sampling time of sensor, the sample frequency to sensor is 1000Hz
More than.
S3, the total degree for obtaining sampling and every time sampling when corresponding be blocked to penetrating noncontacting proximity sensor in matrix
Number；
S4, the moving situation that sphere is judged according to the sampling total time, the total degree of sampling and the number that is blocked.
There are four types of the moving situations of sphere: I. sphere is completely by penetrating matrix and doing ascending motion (in vertical direction
Retarded motion), II. sphere is completely by penetrating matrix and doing falling motion (accelerated motion in vertical direction), III.
Sphere in ball centre not up to the plane for penetrating matrix when begin to do falling motion, IV. sphere pass through in ball centre but
Sphere when penetrating matrix not entirely through to beginning to do falling motion.
Sphere is by being longest to the time for penetrating matrix in state I V, so when sampling total time is greater than the threshold value of setting
When (threshold value can according to be set by the user after actual practice), judge that sphere situation passes through but ball for IV. sphere in ball centre
Body when penetrating matrix not entirely through to beginning to do falling motion.
If the at most corresponding sampling number of the number being blocked is located in first interval, judge that sphere situation is
III. sphere begins to do falling motion when ball centre is not up to the plane for penetrating matrix；If the most institutes of the number being blocked
When corresponding sampling number is located in second interval, then judge that sphere situation is II. sphere completely by penetrating matrix and doing
Falling motion；If the at most corresponding sampling number of the number being blocked is located in 3rd interval, judge that sphere situation is
I. sphere is completely by penetrating matrix and doing ascending motion；The sampling number is arranged according to the sequencing in sampling time
Column, the sampling of initial time is denoted as to be sampled for the first time, and the sampling of end time is denoted as n-th sampling；The first interval isSecond interval be (3rd interval is ), wherein n is sampling total degree,It is to be rounded downwards to n/2；For to n × 10%
It rounds up.
It let us say that again, it is assumed that sampling total degree is 20 times, then first interval is exactly [8,12], second interval is exactly
(12,20], 3rd interval be exactly [1,12), if the at most corresponding sampling numbers of the number being blocked are 8,9,10,11 or 12,
Then judge sphere situation for III；If sensor is blocked, the largest number of numbers are 13,14,15,16,17,18,19 or 20,
Judge sphere situation for II；If sensor is blocked, the largest number of numbers are 1,2,3,4,5,6,7,8,9,10 or 11, are sentenced
Interception body situation is I.
Start noncontacting proximity sensor to matrix is penetrated after, if triggering matrix without sphere, to the reception head of ray
State is 0, if being blocked by sphere to ray, receiving head state is 1；The state of all reception heads of each sampling instant according to
It is secondary to be arranged in an one-dimension array One D Array [x] (x i.e. array element number, value are greater than or wait to amount of radiation).It is more
A sampling instant, which is arranged successively, to be combined into two-dimensional array Two D Array [a] [b] (a i.e. array element number, value is greater than
Or it waits to amount of radiation；B is sampling number, when the product of value and sampling time interval is greater than sphere and passes through the longest of matrix
Between)；Therefore under original state (sphere does not trigger matrix), the initial value of two-dimensional array is 0；When sphere triggers matrix, start to deposit
Sampled data is stored up to 2-D data, stop storage sampled data when sphere leaves matrix and has triggered the main letter of differentiation effect
Number.
Starting with C language but can be not limited only to C language and realize to penetrating the whole process after matrix, pseudocode are as follows:
Noncontacting proximity sensor is arranged in matrix is penetrated, is contacted with disengaging according to sphere to the sampling total time for penetrating matrix
Length, sampling total degree and the be blocked number of noncontacting proximity sensor of sampling judges the movement shape of sphere every time
Condition；This method combines three moving situations because usually judging sphere, avoids only judging sphere situation by sensor sensing, mention
The high accuracy of ball test result, this method are widely used in ball relevant exercise test equipment, and can be to avoid
Traditional artificial naked eyes judge sphere moving situation and caused by test result error, and this method is mainly using non-contact
Formula sensor, so that this method is easy to use, it is low in cost.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (9)
1. a kind of detection method based in parallel to the sphere moving situation for penetrating matrix, which comprises the following steps:
S1, noncontacting proximity sensor is arranged in matrix is penetrated, sphere is enabled to move to penetrating in matrix；
S2, start to sample with predeterminated frequency to when penetrating matrix when sphere enters, the time is denoted as initial time at this time, is detached from sphere
It is the end time to the sampling time for penetrating matrix, sampling total time is calculated, the sampling total time is for the end time and just
The difference of time beginning；
S3, the total degree for obtaining sampling and every time sampling when it is corresponding to penetrating that noncontacting proximity sensor in matrix is blocked
Number；
S4, the moving situation that sphere is judged according to the sampling total time, the total degree of sampling and the number that is blocked.
2. as described in claim 1 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that institute
The emitting head positioning setting of noncontacting proximity sensor is stated to the same side, receives the other side that head positioning is set to relative transmission head.
3. as claimed in claim 2 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that same
Spacing between the adjacent noncontacting proximity sensor in side is 15mm.
4. as described in claim 1 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that right
The emitting head and reception head of the noncontacting proximity sensor all add hood or carry out buried processing.
5. as described in claim 1 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that institute
Stating predeterminated frequency is 1ms.
6. as described in claim 1 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that institute
There are four types of the moving situations for stating sphere: I. sphere completely by penetrate matrix and do ascending motion, II. sphere passes through pair completely
It penetrates matrix and begins to do whereabouts fortune when ball centre is not up to the plane for penetrating matrix doing falling motion, III. sphere
Dynamic, IV. sphere passes through in ball centre but sphere when penetrating matrix not entirely through to beginning to do falling motion.
7. as claimed in claim 6 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that when
When sampling threshold value of the total time greater than setting, judge that sphere situation passes through for IV. sphere in ball centre but sphere is not completely logical
It crosses to beginning to do falling motion when penetrating matrix.
8. as claimed in claim 6 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that if by hiding
When the at most corresponding sampling number of the number of gear is located in first interval, then judge that sphere situation is III. sphere in ball centre
It begins to do falling motion when not up to the plane for penetrating matrix；If the at most corresponding sampling numbers of the number that is blocked are located at the
When in two sections, then judge that sphere situation is II. sphere completely by penetrating matrix and doing falling motion；If the number being blocked
When at most corresponding sampling numbers are located in 3rd interval, then judge sphere situation for I. sphere completely by penetrate matrix and
Do ascending motion；The sampling number is arranged according to the sequencing in sampling time, and the sampling of initial time is denoted as the first time
Sampling, the sampling of end time are denoted as n-th sampling；The first interval is
Second interval is3rd interval is Wherein n is sampling total degree,It is to be rounded downwards to n/2；To round up to n × 10%.
9. as described in claim 1 based on the detection method in parallel to the sphere moving situation for penetrating matrix, which is characterized in that benefit
The moving situation of sphere is judged with C language principal function.
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| CN2699376Y (en) * | 2003-12-01 | 2005-05-11 | 中体同方体育科技有限公司 | Photoelectric opposite irradiation push-up tester |
| CN204631270U (en) * | 2015-01-20 | 2015-09-09 | 樊景民 | A kind of infrared ray curtain correlation unit |
| EP3123930A1 (en) * | 2015-07-28 | 2017-02-01 | Swatch Ag | Detection method for volleyball technique |
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