CN106228231A - Belt conveyor different size object batch loads in mixture the count detection method of transmission - Google Patents
Belt conveyor different size object batch loads in mixture the count detection method of transmission Download PDFInfo
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- CN106228231A CN106228231A CN201610814166.6A CN201610814166A CN106228231A CN 106228231 A CN106228231 A CN 106228231A CN 201610814166 A CN201610814166 A CN 201610814166A CN 106228231 A CN106228231 A CN 106228231A
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- photoswitch
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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
Abstract
The present invention discloses a kind of belt conveyor different size object batch and loads in mixture the count detection method of transmission, on the upper side frame of the transmission belt both sides of belt conveyor, interval arranges three pairs of correlation type photoswitches, every pair of photoswitch is in correlation position, photoswitch is connected with counting control unit, three 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 three 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, by the sequencing of level saltus step during three pairs of photoswitches and maintain low level situation according to conveying objects, identify the specification type of detected packed object, according to η=MSurvey/MBenchmark, obtain transmitting the quantity of body, and carry out accumulated counts respectively according to corresponding specification type.It is an advantage of the invention that the accuracy that improve counting.
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 belt conveyor different size object batch and load in mixture the count detection method of transmission.
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 packed type objects non-fixed form object,
Count detection method is relatively simple, and very reliable, but, carry out non-fixed form in not enforcement by normative operation flow process
Packed object transmission operation in, 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 type photoswitch to enter
Row detection, detection method mainly has two kinds.
The first detection method, is by during correlation type photoswitch with object, photoswitch generation level saltus step
On the basis of carry out confirming and counting.Carry out detecting illustrating with the normally closed photoswitch of correlation type NPN: when conveying objects passes through,
With photoswitch be transmitted object block and produce jumped to low level moment by original high level confirm, and with
When object leaves, photoswitch was completed confirm and carry out accumulated counts by the moment of low transition to high level.This inspection
Survey method is for solid shape object, and particularly it is in the work environment without winged insect, the standardized work of the interference factors such as thing that waft
In, the most reliably, but, for the packed class conveying objects of non-fixed form, the many interference factors described in existing, spy
Not being to cannot be carried out identifying in the case of occurring connecting bag, the error rate causing detection is higher, reduces the reliability of counting,
Therefore, seldom it is used in the counting operation of current belt conveyor.
The second detection method, is confirmed by the time span of a pair correlation type photoswitch according to conveying objects
And counting, the ultimate principle of this detection method is: during with object by photoswitch, photoswitch is jumped to low by high level
Level starts to it by the time interval of twice level saltus step of low transition to high level moment, leads to as the object recorded
Cross the time span of photoswitch, according to length (this fiducial time of conveying objects set in advance in counting control unit
Length fiducial time described in place refers to, obtains the single body average length of time by photoswitch according to test, with this
Basic parameter as comparing and determine object to be detected quantity) ratio, carry out confirming and counting.With the first detection side
Method is compared, and the accuracy rate of this count detection method is greatly improved, and brings up to nearly 95%, is current packed object count
Widely used detection method, particularly in production and the field of circulation of cement, grain, chemical fertilizer, salt industry, sugar industry, chemical industry etc.
Apply the most universal.Although this detection method has greatly improved compared with the first detection method, but its defect existed is also
Can not be ignored, first, based on length fiducial time of parameter, under light condition, measuring and calculating obtains, owing to passing
Defeated machine is when load operating, and at the uniform velocity, it is along with the difference of the load-carrying of object and transmission belt in transmission belt for its speed of service right and wrong
The difference of upper load distribution uniformity and produce change, and, along with increasing and the product matter of transmission equipment of the time of use
The factors impacts such as amount, 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 length specification and kind is effectively detected is each
Differing, this just requires that the packed object to different length specification and kind will carry out the measuring and calculating of length parameter fiducial time,
This adds increased the limitation of the actual application of this 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 algorithms, 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 limited only to the packed object to single length specification, counting standard
Really property is weak, therefore, except in the production and outbound of the enterprises such as grain, cement, chemical fertilizer, salt industry, feedstuff, sugar industry, chemical industry, building materials
Outside commonly used enumerator, the field of circulation the most active in these industries is substantially employing artificial counting.It addition, for
In grain circulation field, realize batch in transmission belt load in mixture the packed object of different length specification, lack meter reliably at present
Number detection method, this place that the application needs improve emphatically just.
Summary of the invention
The technical problem to be solved is to provide for the belt conveyor different size that a kind of count accuracy is high
Object batch loads in mixture the count detection method of transmission.
In order to solve above technical problem, the invention provides a kind of belt conveyor different size object batch and load in mixture
The count detection method of transmission, on the upper side frame of the transmission belt both sides of belt conveyor, interval arranges three pairs of correlation type photoelectricity
Switch, every pair of photoswitch is in correlation position, and photoswitch is connected with counting control unit, and three pairs of photoswitches are simultaneously to logical
The conveying objects crossing detection region detects, and is examined by corresponding according to the distance between three detection location points and conveying objects
The time of measuring point measures the average transmission speed of transmission belt, goes out transmission according to conveying objects in the operation Time Calculation of each test point
Actually detected length M of objectSurvey, according to conveying objects by the sequencing of level saltus step during three pairs of photoswitches and maintenance thereof
Low level situation, identifies the specification type of detected packed object, according to η=MSurvey/MBenchmark, obtain the number of conveying objects
Amount, and carry out accumulated counts respectively according to corresponding specification type.
Different size type of object of the present invention, is divided into two big classes, and a class is small dimension type, and a class is big specification
Type.
Batch of the present invention loads in mixture, and refers to, in same counting operation, to carry out the object of two kinds of specification types
Load in mixture by batch, and count respectively.Described specification type refers to, the kind of object is identical, and its theoretical length is the most identical.Described
Batch refers to, loads in mixture and places the physical quantities of same specification type in counting operation on conveyer no less than six every time.
In distance L1 between described first pair of photoswitch and second pair of photoswitch≤small dimension type transfers object
Minimum gauge object length × (1-γ), distance L2 between second pair of photoswitch and the 3rd pair of photoswitch≤big specification
Minimum gauge object length in type transfers object × (1-γ)-L1, and the maximum specification in small dimension type transfers object
Object length≤(L1+L2) × (1-γ), and L2 ＞ L1, wherein 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=L1+(L1/t0) * t1 0Or MSurvey=(L1+L2)+(L2/t2) * t1 1, wherein:
t0For conveying objects from the transmission time of first pair of photoswitch to second pair of photoswitch；
t1For conveying objects from the transmission time of first pair of photoswitch to the 3rd pair photoswitch；
t2For conveying objects from the transmission time of second pair of photoswitch to the 3rd pair photoswitch；
t1 0It is the parameter of detection small dimension type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by second pair of photoswitch；
t1 1It is the parameter detecting big specification type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by the 3rd pair of photoswitch；
t0、t1 0 、t1、t1 1And t2Obtained according to the time detecting of photoswitch level saltus step by counting control unit.
Described MBenchmarkIncluding MLittle benchmarkAnd MBig benchmark, wherein MLittle benchmarkRefer to the datum length of small dimension type transfers object, MBig benchmarkIt is
Refer to the datum length of big specification type transfers object.MBenchmarkFor for first five single-piece thing measured in each independent counting operation
The meansigma methods of the detection length of body, as datum length, is set in counting control unit.
The present invention is the impact of exclusive PCR factor, in counting control unit, arranges length corresponding interference time and adds
To ignore.In each individually counting operation, when completing the counting of first single-piece conveying objects, counting control unit
Record the transmission belt time numerical value from first test point to second test point, automatically arrange according to counting control unit is internal
12% good t0Relation (wherein t0 During for first conveying objects of this specification type in each counting operation by photoswitch
The t recorded0Value) calculate a time period numerical value, it is arranged in counting control unit as basic parameter, in this, as detection
To length interference time ignore, with the impact of exclusive PCR factor.
Superior effect of invention is:
1) the count detection method of the present invention is capable of the accurate counting to single length specification conveying objects, and to two kinds
The different length specification type transfers object specification type accurate counting pressing correspondence respectively in the case of mixed assembly line, meets
Client's diversified demand；
2) the packed object to single length specification, it is possible to efficiently identifying out is single-piece or company's bag, and connects the quantity of bag；
3) the packed object to two kinds of different length specifications efficiently identifies its specification number of types in the case of mixed assembly line
Amount, the biggest specification type and the quantity of small dimension type, and count exactly by corresponding specification type；
4) 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 so that counting operation simplifies, it is simple to popularization and application；
5) count detection method of the present invention improves the accuracy of counting, can expand the utilization rate of counting assembly, effectively save
About human cost；
6) present invention can effectively measuring go out transmission belt average transmission speed, improve the precision of detection even bag number, real
Existing accurate metering；
7) use three conveying objects is detected by correlation type photoswitch by the operation conditions of three detection location points,
More accurate with this transmission belt average speed calculated, make 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 one of detection method；
Fig. 3 is the principle schematic two 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, 4C correlation type photoswitch；
T-the object transmission time by test point A, for small dimension object, t=t1 0 + t0；For big specification object, t=
t1 1 + t1 ；
The average transmission speed of V-transmission belt；
V0 -transmission belt average transmission speed when test point A runs to test point B；
V1-transmission belt average transmission speed when test point A runs to test point C；
V2-transmission belt average transmission speed when test point B runs to test point C.
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 shown in Figure 1, Figure 2 and Figure 3, on the frame both sides upper side frame 101 of belt conveyor 1, suitable detection is selected
Location point A, and as datum mark along transmission belt transmission direction away from A point distance for determine at L1 detection location point B, then with
Based on B point, the transmission direction along transmission belt detects location point C away from detection location point B distance for determining at L2.Respectively in detection
At some A, B, C, the mounting bracket 2 of photoswitch is fixed in the suitable position of machine frame at two sides upper side frame 101, by correlation type light
Electric switch 4 is contained in mounting bracket 2, the position of fine setting photoswitch so that two photoswitches on each measurement 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 by counting control unit these data are carried out computing and process realizes Counts.When carrying out counting operation, start and pass
Defeated machine control unit makes belt conveyor 1 operate, and is put on transmission belt 102 by conveying objects 3, and conveying objects 3 followed by biography
The operating of defeated belt 102 and move, and successively the correlation type photoswitch 4A on test point A, B, location of C, 4B,
4C, counting control unit detects number according to conveying objects 3 accordingly by what detection during correlation type photoswitch 4A, 4B, 4C obtained
According to, and by counting control unit, these data are carried out computing and process, identify the specification of detected conveying objects 3
Type and the quantity of correspondence thereof, and carry out accumulated counts work respectively by the specification type identified.
Using test point A as datum mark, the confirmation point i.e. starting as counting job run and terminating.Conveying objects 3 is opened
Begin by time, photoswitch 4A is low level by high level saltus step, starts a new counting running, when conveying objects 3
When leaving, photoswitch 4A is high level by low transition, terminates a counting running, and passes through counting control unit
Computing and process to detection data, carries out accumulated counts respectively by the specification type of the conveying objects identified.
In order to realize accurate metering, set the datum length M of single-piece detection objectBenchmarkAnd insignificant distracter time is long
Degree.It addition, set restrictive job requirements, i.e. when transmitting operation, should accomplish when placing conveying objects on transmission belt: 1)
When only carrying out the object count operation of a kind of length specification, first object placed, and protect between second object thereafter
Hold a certain distance.2) when the packed object batch of two kinds of different size types loads in mixture counting operation, for ease of the company's of identification bag
Type, then first that needs every batch of object individually placed with last, say, that can not be with transmission thing above
Body is connected, and can not be connected with conveying objects below.
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.
Different size type of object of the present invention, is divided into two big classes, and a class is small dimension type, and a class is big specification
Type.
Batch of the present invention loads in mixture, and refers to, in same counting operation, to carry out the object of two kinds of specification types
Load in mixture by batch, and count respectively.Described specification type refers to, the kind of object is identical, and its theoretical length is the most identical.Described
Batch refers to, loads in mixture and places the physical quantities of same specification type in counting operation on conveyer no less than six every time.
Set the minimum gauge in distance L1 between described test point A and test point B≤small dimension type transfers object
Object length × (1-γ), distance L2 between second pair of photoswitch and the 3rd pair of photoswitch≤big specification type transfers thing
Minimum gauge object length in body × (1-γ)-L1, and the maximum specification object length in small dimension type transfers object≤
(L1+L2) × (1-γ), and L2 ＞ L1, wherein γ is penalty coefficient, and its span is 0.15-0.3.
Described MBenchmarkIncluding MLittle benchmarkAnd MBig benchmark, wherein MLittle benchmarkRefer to the datum length of small dimension type transfers object, MBig benchmarkIt is
Refer to the datum length of big specification type transfers object.MBenchmarkFor for first five single-piece thing measured in each independent counting operation
The meansigma methods of the detection length of body, as datum 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 and 4C, is identified the specification type of conveying objects by counting control unit
And carry out accumulated counts, meanwhile, counting control unit is according to the conveying objects corresponding M of specification type selecting identifiedSurvey= L1 +
(L1/t0) * t1 0(small dimension type transfers object) or MSurvey=(L1+L2)+(L2/t2) * t1 1(big specification type passes
Defeated object) calculate detection length M of this specification type of objectSurvey, as the specification type transfers of the same race determining next detection
The datum length M of physical quantitiesBenchmark.It addition, after first conveying objects being detected, counting control unit calculates automatically
The average detected length of the current all same specification type of object detected is as datum length MBenchmark, determine next of the same race
The quantity of the conveying objects of specification type.As, after counting control unit detects the 3rd conveying objects, counting control unit
Automatically the average detected length of the two pieces single object currently detected is calculated as datum length MBenchmark, determine the 3rd
The quantity of conveying objects.As, after counting control unit detects the 4th conveying objects, counting control unit calculates automatically
The length of current the 3rd single object detected is average, as datum length again with the average detected length of front two pieces object
MBenchmark, determine the quantity of the 4th conveying objects.By that analogy, until calculating the average of first five the type single object
Detection length, as datum length MBenchmarkIt is automatically set in counting control unit as determining that this specification type detection passes afterwards
The underlying parameter of defeated physical quantities.
If counting control unit sets M in detection automaticallyBenchmarkDuring, owing to there is even bag so that detect for the last time
Time the accumulated quantity that obtains more than 5 time, then calculate single-piece detection object average length by this accumulated quantity long as benchmark
Degree MBenchmark。
MSurvey=L1+(L1/t0) * t1 0Or MSurvey=(L1+L2)+(L2/t2) * t1 1, wherein:
t0For conveying objects from the transmission time of first pair of photoswitch to second pair of photoswitch；
t1For conveying objects from the transmission time of first pair of photoswitch to the 3rd pair photoswitch；
t2For conveying objects from the transmission time of second pair of photoswitch to the 3rd pair photoswitch；
t1 0It is the parameter of detection small dimension type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by second pair of photoswitch；
t1 1It is the parameter detecting big specification type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by the 3rd pair of photoswitch；
t0、t1 0 、t1、t1 1And t2Obtained according to the time detecting of photoswitch level saltus step by counting control unit.
Described MSurveyComputing formula and MBenchmarkBy counting control unit according to detection by time three to correlation photoswitch level become
Change situation is determined:
1) when conveying objects is successively through photoswitch 4A, 4B, and photoswitch 4A, 4B successively experience by high level saltus step successively
For low level, and maintain low level state simultaneously, establish by cable if maintain low level state to start to light from photoswitch 4A, 4B simultaneously
Pass 4A is by low transition to high period, photoswitch 4C does not experiences by high level to low level saltus step, then determine
What this detected is the single packed object of small dimension type or company's bag of two packed objects of small dimension type, according to figure
2 actually detected length M calculating packed objectSurvey:
I.e. by V0=L1 / t0= MSurvey/ t = MSurvey/ (t1 0 + t0), release MSurvey=L1+(L1/t0) * t1 0, wherein t1 0 And
t0 Automatically can be detected by counting control unit.
Thus obtain, quantity η of conveying objects=MSurvey/MLittle benchmark, wherein MLittle benchmarkFor the little rule set in counting control unit
The datum length of lattice type transfers object, MSurveyActually detected length 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.
2) when conveying objects is successively through photoswitch 4A, 4B, and photoswitch 4A, 4B successively experience by high level successively
Saltus step is low level, and maintains low level state simultaneously, if maintain low level state to start to light from photoswitch 4A, 4B simultaneously
Electric switch 4A is by low transition to high period, photoswitch 4C also experiences by high level to low level saltus step, and with
Photoswitch 4A, 4B maintain low level state simultaneously, then can determine whether that the type of detected object is: single big specification type thing
Body, interconnective two or more big specification type of object, or be interconnective two or more
Small dimension type of object, carries out calculating actually detected length M of conveying objects according to Fig. 3Survey
I.e. by V1=(L1+L2)/t1= MSurvey/ t =MSurvey/ (t1 1 + t1)=L2 / t2Draw:
MSurvey=(L1+L2)+(L1+L2/t1) * t1 1=(L1+L2)+(L1/t2) * t1 1；
Described MBenchmarkChoose: when the conveying objects of previous detection is big specification type of object, calculate current detection physical quantities
Time select MBig benchmark.When the conveying objects of previous detection is that small dimension type of object is, according to the restrictive operation of described setting
Require and belt conveyor on fill conveying objects working condition, by current detection object being carried out pre-storage, simultaneously by
Continuous two detection objects after it are identified, and determine that this detection conveying objects is big specification type or small dimension
Type of object, counting control unit, according to the specification type identified, chooses the M of correspondence automaticallyBenchmark。
Thus obtain, quantity η of conveying objects=MSurvey/MBenchmark, wherein MBenchmarkFor the transmission thing set in counting control unit
The datum length of body, counting control unit automatically selects the M of correspondence according to the specification type of the conveying objects identifiedLittle benchmarkOr
MBig benchmark, MSurveyFor the actually detected length value of 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 (6)
1. belt conveyor different size object batch loads in mixture a count detection method for transmission, in the transmission of belt conveyor
On the upper side frame of belt both sides, interval arranges three pairs of infrared opposite-radiation type photoswitches, and every pair of photoswitch is in correlation position,
Photoswitch is connected with counting control unit, and three pairs of photoswitches detect by the conveying objects in detection region simultaneously,
The average biography of transmission belt is measured by the time of corresponding test point according to the distance between three detection location points and conveying objects
Defeated 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 biography
Defeated object is by the sequencing of level saltus step during three pairs of photoswitches and maintains low level situation, identifies detected
The specification type of packed object, according to η=MSurvey/MBenchmark, obtain the quantity of conveying objects, and enter respectively according to corresponding specification type
Row accumulated counts.
Belt conveyor different size object the most according to claim 1 batch loads in mixture the count detection method of transmission, its
It is characterised by: in distance L1 between described first pair of photoswitch and second pair of photoswitch≤small dimension type transfers object
Minimum gauge object length × (1-γ), distance L2 between second pair of photoswitch and the 3rd pair of photoswitch≤big specification
Minimum gauge object length in type transfers object × (1-γ)-L1, and the maximum specification in small dimension type transfers object
Object length≤(L1+L2) × (1-γ), and L2 ＞ L1, wherein γ is penalty coefficient, and its span is 0.15-0.3.
Belt conveyor different size object the most according to claim 1 batch loads in mixture the count detection method of transmission, its
It is characterised by: quantity η of described conveying objects=MSurvey/MBenchmark, wherein MBenchmarkFor the conveying objects of setting in counting control unit
Datum 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.
Belt conveyor different size object the most according to claim 1 and 2 batch loads in mixture the count detection method of transmission,
It is characterized in that: described MSurvey=L1+(L1/t0) * t1 0Or MSurvey=(L1+L2)+(L2/t2) * t1 1, wherein:
t0For conveying objects from the transmission time of first pair of photoswitch to second pair of photoswitch；
t1For conveying objects from the transmission time of first pair of photoswitch to the 3rd pair photoswitch；
t2For conveying objects from the transmission time of second pair of photoswitch to the 3rd pair photoswitch；
t1 0It is the parameter of detection small dimension type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by second pair of photoswitch；
t1 1It is the parameter detecting big specification type transfers object, when passing through for conveying objects, produces the at the first pair of photoswitch
Before secondary level saltus step, the conveying objects transmission time by the 3rd pair of photoswitch；
t0、t1 0 、t1、t1 1And t2Obtained according to the time detecting of correlation photoswitch level saltus step by counting control unit.
Belt conveyor different size object the most according to claim 1 batch loads in mixture the count detection method of transmission, its
It is characterised by: described MBenchmarkIncluding MLittle benchmarkAnd MBig benchmark, MLittle benchmarkRefer to the datum length of small dimension conveying objects, MBig benchmarkRefer to advise greatly
The datum length of lattice conveying objects, for the putting down of detection length of first five single object measured in each independent counting operation
Average, as datum length, is set in counting control unit.
Belt conveyor different size object the most according to claim 1 batch loads in mixture the count detection method of transmission, its
It is characterised by: in described counting control unit, length corresponding interference time is set and is ignored, with exclusive PCR because of prime implicant pair
The detection of conveying objects and the impact of identification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814166.6A CN106228231B (en) | 2016-09-09 | 2016-09-09 | Belt conveyor different size object batch loads in mixture the count detection method of transmission |
Applications Claiming Priority (1)
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