CN106250977A - A kind of count detection method of belt conveyor - Google Patents
A kind of count detection method of belt conveyor Download PDFInfo
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- CN106250977A CN106250977A CN201610813722.8A CN201610813722A CN106250977A CN 106250977 A CN106250977 A CN 106250977A CN 201610813722 A CN201610813722 A CN 201610813722A CN 106250977 A CN106250977 A CN 106250977A
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- 238000001514 detection method Methods 0.000 title claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 238000004364 calculation method Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241000256626 Pterygota <winged insects> Species 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M7/00—Counting of objects carried by a conveyor
- G06M7/02—Counting of objects carried by a conveyor wherein objects ahead of the sensing element are separated to produce a distinct gap between successive objects
- G06M7/04—Counting of piece goods, e.g. of boxes
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Control Of Conveyors (AREA)
Abstract
The present invention discloses a kind of count detection method of belt conveyor, on the upper side frame of the transmission belt both sides of belt conveyor, interval arranges two to correlation type photoswitch, every pair of photoswitch is in correlation position, photoswitch is connected with counting control unit, two pairs of photoswitches detect by the conveying objects in detection region simultaneously, the average transmission speed of transmission belt is measured by the time of corresponding test point according to the distance between two detection location points and conveying objects, go out actually detected length M of conveying objects in the operation Time Calculation of each test point according to conveying objectsSurvey, according to η=MSurvey/MBenchmark, obtain the quantity of conveying objects, and carry out accumulated counts.It is an advantage of the invention that can effectively measuring go out conveying objects average transmission speed, improve the precision of detection even bag number, it is achieved accurate metering.
Description
Technical field
The present invention relates to portable belt conveyer, carloader etc. and transmit the counted fields of packed object, particularly to one
Plant the count detection method of belt conveyor.
Background technology
Belt conveyor is the important transmission equipment used in modern production operation, especially grain, cement, chemical fertilizer,
Salt industry, feedstuff, sugar industry, chemical industry, building materials etc. are packaged as in the industry of feature with bag, are that it produces set requisite with circulation
Standby, and count detection method to ensure belt conveyor transmit packed object time counting accuracy, the raising of work efficiency and
The aspects such as the diversity requirement meeting user are particularly important.Belt conveyor is used to be transmitted in operation, if transmission
Be solid shape object or in indoor by the work flow of specification to transmit the non-fixed form things such as packed type objects
Body, count detection method is relatively simple, and very reliable, but, do not take by normative operation flow process carry out non-solid
In the transmission operation of shaped article, the requirement to count detection method is the highest.The transmission operation of usual packed object is basic
It is all to open wide or half environment opened wide is carried out, therefore, in counting process from the interference factor in terms of working environment also
More, such as: winged insect, waft thing etc.；It addition, the burr etc. that bag rope, the overlap of packaging bag, transmission belt wear and tear and produce, also it is
Affect the Important Disturbed Factors of count accuracy, the existence of these interference factors above-mentioned, not only count detection method is proposed
Higher requirement.
Counting currently for the packed object on belt conveyor, it is common that use a pair correlation photoswitch to carry out
Detection, detection method mainly has two kinds.
The first detection method, is that photoswitch generation level is jumped by during a pair correlation photoswitch with object
Become benchmark to carry out confirming and counting.Carry out detecting illustrating with the normally closed photoswitch of correlation type NPN: when conveying objects passes through
Time, with photoswitch be transmitted object block and produce jumped to low level moment by original high level confirm,
And when leaving with object, photoswitch was completed confirm and carry out accumulated counts by the moment of low transition to high level.This
Kind detection method is for solid shape object, and particularly it is in the work environment without winged insect, the standardization of the interference factors such as thing that waft
In operation, the most reliably, but, for the bag-shaped class conveying objects of non-fixed form, the many interference described in existing because of
Element, particularly even cannot be carried out identifying, the error rate causing detection is higher occurring in the case of bag, and that can reduce counting can
By property, therefore, seldom it is used in the counting operation of current belt conveyor.
The second detection method, is to be confirmed by the time span of a pair correlation photoswitch according to conveying objects
And counting.The ultimate principle of this detection method is: during with object by a pair photoswitch, photoswitch is by high level saltus step
Start to it by the time interval of twice level saltus step of low transition to high level moment to low level, as the thing recorded
The body time span by photoswitch, according to length fiducial time of conveying objects set in advance in counting control unit
(length fiducial time described herein refers to, obtains the single body average length of time by photoswitch according to test, with
This is as the basic parameter comparing and determining object to be detected quantity) ratio, carry out confirming and counting.Detect with the first
Method is compared, and the accuracy rate of this count detection method is greatly improved, and brings up to more than 95%, is current packed object
Count widely used detection method, particularly in production and the circulation of cement, grain, chemical fertilizer, salt industry, sugar industry, chemical industry etc.
Field application is the most universal.Although this detection method has greatly improved compared with the first detection method, but its existence is scarce
Fall into and also can not be ignored, first, based on length fiducial time of parameter, under light condition, measuring and calculating obtains, by
In conveyer at load operating time, at the uniform velocity, it is along with the difference of object load-carrying and biography in transmission belt for its speed of service right and wrong
The difference of load distribution uniformity on defeated band and produce change, and, along with increasing and the product of transmission equipment of the time of use
The factors impacts such as quality, cause the aging of transmission part and abrasion, thus have influence on the change of conveyer transmission speed,
And then have influence on the accuracy of counting；Secondly as the length that the packed object of different size and kind is effectively detected is each
Differing, this just requires that the packed object to different size and kind will carry out the measuring and calculating of length parameter fiducial time, and this is just
Add the limitation of this kind of actual application of detection method；Again, owing to the transmission speed of different conveyers is not quite similar, because of
This, will individually carry out the measuring and calculating of length parameter fiducial time, add cost for every conveyer.Packed object is in transmission
Display case on band, also can affect its accuracy that can be effectively recognized out even bag quantity in the case of even bag.Due to upper
State the existence of factor, although at the length parameter and add during object is connected the confirmation of bag quantity fiducial time of measuring and calculating
A little compensation data methods, but still can not the quantity of the effective company's of identifying bag, have impact on the accuracy of counting.
The detection method of the packed object count of current transmission is not also fully solved the problem of count accuracy, therefore, except
In the productions such as grain, cement, chemical fertilizer, salt industry, feedstuff, sugar industry, chemical industry, building materials and outbound outside commonly used enumerator, at this
In a little industries, the field of circulation the most active uses artificial counting substantially.This place that the application needs improve emphatically just.
Summary of the invention
The technical problem to be solved is to provide for the counting inspection of the high belt conveyor of a kind of count accuracy
Survey method.
In order to solve above technical problem, the invention provides a kind of count detection method of belt conveyor, at skin
Arranging two to correlation type photoswitch with interval on the upper side frame of the transmission belt both sides of conveyer, it is right that the every pair of photoswitch is in
Penetrating position, photoswitch is connected with counting control unit, and two pairs of photoswitches enter by the conveying objects in detection region simultaneously
Row detection, measures transmission belt according to the distance between two detection location points and conveying objects by the time of corresponding test point
Average transmission speed, goes out actually detected length M of conveying objects according to conveying objects in the operation Time Calculation of each test pointSurvey,
According to η=MSurvey/MBenchmark, obtain the quantity of conveying objects, and carry out accumulated counts.
The length of minimum gauge conveying objects in distance L≤detection region between described two pairs of correlation type photoswitches ×
(1-γ), γ is penalty coefficient, and its span is 0.15-0.3.
Quantity η of described conveying objects=MSurvey/MBenchmark, wherein MBenchmarkThe base of the conveying objects for setting in counting control unit
Standard length, MSurveyActually detected length value for conveying objects；η is integer, and it is as follows that it rounds rule:
1) when fractional part >=0.43 of η, the integer part of η adds 1, fractions omitted part；
2) when fractional part ＜ 0.43 of η, the integer part of η is constant, fractions omitted part.
Described MSurvey=L+(L/t0) * t1 0, wherein:
t0For conveying objects from the transmission time of first pair of photoswitch to second pair of photoswitch；
t1 0When passing through for conveying objects, before first pair of photoswitch produces second time level saltus step, conveying objects passes through second
The transmission time to photoswitch；
t1 0 And t0Obtained according to the time detecting of photoswitch level saltus step by counting control unit.
Described MBenchmarkFor the meansigma methods of detection length of first five single object measured in each counting operation as base
Standard length, is set in counting control unit.
The present invention is in each counting operation, according to recording transmission belt from first test point to second test point time
Numerical value, is maintained the low level time period by the photoswitch detected by high level after low transition, is set to corresponding
Interference time, length was ignored, and carried out the impact of exclusive PCR factor.
Superior effect of invention is:
1) can effectively measuring go out conveying objects average transmission speed, improve the precision of detection even bag number, it is achieved accurately
Counting；
2) length corresponding interference time is set and is ignored to come the impact of exclusive PCR factor, and the benchmark of single conveying objects
Length MBenchmarkParameter, it is ensured that the accuracy of counting, and counting operation is simplified, it is simple to popularization and application；
3) improve the accuracy of counting, be effectively saved human cost and management cost；
4) two are used conveying objects to be detected by correlation type photoswitch by the operation conditions of two test points, in terms of this
The transmission belt average speed calculated is more accurate, it is ensured that actually detected length M of conveying objectsSurveyIt is more accurate, it is ensured that
The accuracy of counting.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the principle schematic of detection method；
Label declaration in figure
1 belt conveyor；
101-frame upper side frame；102-transmission belt；
The mounting bracket of 2-photoswitch；3-conveying objects；
4A, 4B correlation type photoswitch.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the present invention can be defined by the claims
Implement with the multitude of different ways covered.
Describe embodiments of the invention below in conjunction with the accompanying drawings in detail, the present invention as a example by the normally closed photoswitch of correlation type NPN,
The normally closed photoswitch of correlation type NPN is in high level state without object when blocking, and is in low level shape when there being object to block
State.
As depicted in figs. 1 and 2, on the upper side frame 101 of belt conveyor 1 frame both sides, select suitable detection position
Point A, and detect location point B away from A point distance for determining at L along transmission belt transmission direction as datum mark.Respectively in detection
At some A, B, the mounting bracket 2 of photoelectric sensor is fixed in the suitable position of machine frame at two sides upper side frame 101, by correlation type light
Electric switch 4A, 4B are separately fixed in corresponding mounting bracket, the position of fine setting correlation type photoswitch 4A, 4B so that each
Two photoswitches measured on point are in correlation position.
Institute's conveying objects is detected by counting control unit and obtains and detect data accordingly by belt conveyor 1,
And the computing that these data carried out by counting control unit and process and realize Counts.When carrying out counting operation, open
The counting control unit of dynamic conveyer makes belt conveyor 1 operate, and is put on transmission belt 102 by conveying objects 3, conveying objects
3 operatings that followed by transmission belt 102 and move, and the successively correlation type photoswitch on test point A, B location
4A, 4B, counting control unit detects number according to conveying objects accordingly by detection acquisition during correlation type photoswitch 4A, 4B
According to, and by counting control unit, these data are carried out computing and process, realize accumulated counts work.
Using test point A as datum mark, the confirmation point i.e. starting as counting job run and terminating.Conveying objects starts
During by test point A, photoswitch 4A is low level by high level saltus step, starts a new counting running, works as transmission
When object leaves test point A, photoswitch 4A is high level by low transition, terminate one counting running, and according to
Counting control unit carries out accumulated counts to computing and the process of detection data.
For accurate metering, set the datum length M of single-piece detection objectBenchmarkAnd insignificant distracter time span；Separately
Outward, the restrictive job requirements of setting is: when transmitting operation, must make to be placed when placing conveying objects in transmission belt
First transmission thing and second between maintain a certain distance, be not i.e. connected with each other with object behind.
The setting of described distracter time span: in each individually counting operation, pass when completing first single-piece
During the counting of defeated object, counting control unit records the transmission belt time numerical value from first test point to second test point,
According to 12% t automatically set inside counting control unit0Relation, wherein t0 For this specification type in each counting operation
The t recorded when first conveying objects is by photoswitch0Value, calculates a time period numerical value, arranges as basic parameter
In counting control unit, in this, as length interference time detected.
Set two to the length of minimum gauge conveying objects in distance L between photoswitch 4A, 4B≤detection region ×
(1-γ), γ is to affect bagged articles body length to measure the penalty coefficient of factor, and its span is 0.15-0.3.
Described MBenchmarkFor the meansigma methods of detection length of first five single object measured in each counting operation as base
Standard length, is set in counting control unit.
Described conveying objects datum length MBenchmarkDetermination: according to the restrictive job requirements of described setting, count at each
In number operation, first conveying objects of detected each specification type is single-piece.According to first conveying objects by right
Its potential change situation during emitting photoswitch 4A, 4B, is identified conveying objects by counting control unit and carries out accumulated counts,
Meanwhile, according to MSurvey=L1+(L1/t0) * t1 0Calculate detection length M of this objectSurvey, as the biography determining next detection
The datum length M of defeated physical quantitiesBenchmark.After first conveying objects being detected, counting control unit calculates currently automatically
The average detected length of all single object detected is as datum length MBenchmark, determine the quantity of next conveying objects.
As, after counting control unit detects the 3rd conveying objects, counting control unit calculates two currently detected automatically
The average detected length of part single object is as datum length MBenchmark, determine the quantity of the 3rd conveying objects.As, counting control
After unit processed detects the 4th conveying objects, counting control unit calculates the 3rd the single-piece thing currently detected automatically
The length of body is average, as datum length M again with the average detected length of front two pieces objectBenchmark, determine the 4th conveying objects
Quantity.By that analogy, until calculating the average detected length of first five single object, as datum length MBenchmarkAutomatically set
Put in counting control unit as the underlying parameter determining detection conveying objects quantity afterwards.Control unit sets in detection automatically
Determine MBenchmarkDuring, owing to there is even bag so that when the accumulated quantity obtained during last detection is more than 5, then add up by this
Quantity calculates single-piece detection object average length as datum length MBenchmark。
MSurvey=L+(L/t0) * t1 0, wherein:
t0For conveying objects from the transmission time of test point A to test point B；
t1 0When passing through for conveying objects, before photoswitch 4A produces second time level saltus step, conveying objects passes through photoswitch 4B
The transmission time；
t1 0 And t0Obtained according to the time detecting of photoswitch level saltus step by counting control unit.
Thus obtain, quantity η of conveying objects=MSurvey/MBenchmark, wherein MBenchmarkFor the transmission thing set in counting control unit
The datum length of body, MSurveyActually detected length value for conveying objects；η is integer, and it is as follows that it rounds rule:
1) when fractional part >=0.43 of η, the integer part of η adds 1, fractions omitted part；
2) when fractional part ＜ 0.43 of η, the integer part of η is constant, fractions omitted part.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. the count detection method of a belt conveyor, it is characterised in that: upper in the transmission belt both sides of belt conveyor
On frame, interval arranges two and correlation type photoswitch, every pair of photoswitch is in correlation position, photoswitch and tally control
Unit connects, and two pairs of photoswitches detect by the conveying objects in detection region simultaneously, according to two detection location points
Between distance and conveying objects measure the average transmission speed of transmission belt by the time of corresponding test point, according to conveying objects
Operation Time Calculation at each test point goes out actually detected length M of conveying objectsSurvey, according to η=MSurvey/MBenchmark, obtain conveying objects
Quantity, and carry out accumulated counts.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: described two pairs of correlation type light
The length of minimum gauge conveying objects × (1-γ) in distance L between electric switch≤detection region, γ is penalty coefficient, and it takes
Value scope is 0.15-0.3.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: the number of described conveying objects
Amount η=MSurvey/MBenchmark, wherein MBenchmarkThe datum length of the conveying objects for setting in counting control unit, MSurveyReality for conveying objects
Border detection length value；η is integer, and it is as follows that it rounds rule:
1) when fractional part >=0.43 of η, the integer part of η adds 1, fractions omitted part；
2) when fractional part ＜ 0.43 of η, the integer part of η is constant, fractions omitted part.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: described MSurvey=L+(L/
t0) * t1 0, wherein:
t0For conveying objects from the transmission time of first pair of photoswitch to second pair of photoswitch；
t1 0When passing through for conveying objects, before first pair of photoswitch produces second time level saltus step, conveying objects passes through second
The transmission time to photoswitch；
t1 0 And t0Obtained according to the time detecting of photoswitch level saltus step by counting control unit.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: described MBenchmarkFor each meter
The meansigma methods of the detection length of first five single object measured in number operation, as datum length, is set in tally control list
In unit.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: use two to correlation type light
Electric switch detects by the conveying objects in detection region simultaneously, according to the distance between two detection location points and transmission
Object measures the average transmission speed of transmission belt by the time of corresponding test point.
The count detection method of belt conveyor the most according to claim 1, it is characterised in that: in counting control unit
In, length corresponding interference time is set and is ignored, with exclusive PCR because of the prime implicant detection to conveying objects and the shadow of identification
Ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813722.8A CN106250977B (en) | 2016-09-09 | 2016-09-09 | A kind of count detection method of belt conveyor |
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|---|---|---|---|
| CN201610813722.8A CN106250977B (en) | 2016-09-09 | 2016-09-09 | A kind of count detection method of belt conveyor |
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| CN106250977B CN106250977B (en) | 2019-01-08 |
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| CN107220701A (en) * | 2017-06-19 | 2017-09-29 | 上海风偃自动化科技有限公司 | The accurate metering detection method of the packed object of belt transport |
| CN107434076A (en) * | 2017-09-12 | 2017-12-05 | 江苏牧羊控股有限公司 | A kind of bag number statistical method of quantitative bag type package material |
| CN111438070A (en) * | 2020-04-16 | 2020-07-24 | 扬州大学 | Fruit grain size classification equipment |
| CN112906851A (en) * | 2021-03-24 | 2021-06-04 | 中国兵器装备集团自动化研究所有限公司 | Counting method based on segment ratio jump threshold judgment |
| CN114096799A (en) * | 2019-08-27 | 2022-02-25 | 株式会社Lg新能源 | Apparatus and method for measuring thickness of unit cell |
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| CN106250977B (en) | 2019-01-08 |
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