CN106228231B - 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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- CN106228231B CN106228231B CN201610814166.6A CN201610814166A CN106228231B CN 106228231 B CN106228231 B CN 106228231B CN 201610814166 A CN201610814166 A CN 201610814166A CN 106228231 B CN106228231 B CN 106228231B
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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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Abstract
The present invention discloses the count detection method that a kind of belt conveyor different size object batch loads in mixture transmission, three pairs of correlation type optoelectronic switches of interval setting on the upper side frame of the transmission belt two sides of belt conveyor, each pair of optoelectronic switch is in penetrating position, optoelectronic switch is connect with counting control unit, three pairs of optoelectronic switches are detected to by the conveying objects of detection zone 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, the actually detected length M of conveying objects is calculated in the runing time of each test point according to conveying objectsIt surveys, the sequencing of level jump and its low level situation of maintenance, identify the specification type of detected packed object, according to η=M when passing through three pairs of optoelectronic switches according to conveying objectsIt surveys/MBenchmark, the quantity of transmission body is obtained, and carry out accumulated counts respectively according to corresponding specification type.It is an advantage of the invention that improving the accuracy of counting.
Description
Technical field
The present invention relates to the counted fields that portable belt conveyer, carloader etc. transmit packed object, in particular to one
Kind belt conveyor different size object batch loads in mixture the count detection method of transmission.
Background technique
Belt conveyor is important transmission device used in modern production operation, especially grain, cement, chemical fertilizer,
Salt industry, feed, sugar industry, chemical industry, building materials etc. are that its production is set with essential in circulation in the industry characterized by bag is packed
It is standby, and count detection method to ensure belt conveyor transmit packed object when count accuracy, working efficiency raising and
The diversity requirement etc. for meeting user is particularly important.It is carried out in transmission operation using belt conveyor, if transmission
Be fixed shaped objects or be to transmit packed type objects non-fixed form object by the work flow of specification indoors,
Count detection method is relatively simple, and very reliable, however, implementing to carry out non-fixed form by normative operation process no
Packed object transmission operation in, the requirement to count detection method is then higher.The transmission operation of usual packed object is basic
All be open wide or half open environment in carry out, therefore, the disturbing factor in counting process in terms of the working environment
It is more, such as: winged insect, the object that floats etc.；In addition, bag rope, the overlap of packaging bag, transmission belt are worn and the flash etc. of generation, and
The Important Disturbed Factors of count accuracy are influenced, the presence of these above-mentioned disturbing factors not only proposes count detection method
Higher requirement.
Currently, the counting for the packed object on belt conveyor, it is common that using a pair of of correlation type optoelectronic switch into
Row detection, there are mainly two types of detection methods.
The first detection method is with object by the way that during correlation type optoelectronic switch, level jump occurs for optoelectronic switch
On the basis of confirmed and counted.It is detected with the normally closed optoelectronic switch of correlation type NPN to illustrate: when conveying objects pass through,
With optoelectronic switch is blocked by conveying objects and is confirmed what is generated jumps to low level moment by original high level, and with
When object leaves, optoelectronic switch jumps to the moment of high level by low level to complete to confirm and carry out accumulated counts.This inspection
Survey method is for fixed shaped objects, especially its standardized work in the work environment without disturbing factors such as winged insect, the objects that floats
In, very reliably, however, for the packed class conveying objects of non-fixed form, it is special since there are many disturbing factors
It is not that can not be identified in the case where there is even bag, causes the error rate of detection higher, reduce the reliability of counting,
Therefore, it is seldom used in the counting operation of current belt conveyor.
Second of detection method is confirmed according to conveying objects by the time span of a pair of of correlation type optoelectronic switch
And counting, the basic principle of this detection method is: when passing through optoelectronic switch with object, optoelectronic switch is jumped to low by high level
Level starts to it time interval that the level jump twice of high level moment is jumped to by low level, logical as the object measured
The time span for crossing optoelectronic switch, according to fiducial time length (this of conveying objects preset in counting control unit
The fiducial time length that place is said refers to, average length of time of the single body by optoelectronic switch is obtained according to test, with this
As the basic parameter for comparing and determining object to be detected quantity) ratio, to be confirmed and be counted.With the first detection side
Method is compared, and the accuracy rate of this count detection method is greatly improved, and is increased to nearly 95%, is current packed object count
The detection method being widely used, the especially production and the field of circulation in cement, grain, chemical fertilizer, salt industry, sugar industry, chemical industry etc.
Using more universal.Although the detection method is greatly improved compared with the first detection method, existing defect
It is that cannot be neglected, firstly, the fiducial time length as basic parameter, is to calculate to obtain under light condition, due to passing
Defeated machine in load operating, speed of service right and wrong at the uniform velocity, it with the load-carrying of object in transmission belt difference and transmission belt
The difference of upper load distribution uniformity and generate variation, also, with use the time increase and the product matter of transmission device
The factors such as amount influence, and the aging and abrasion of transmission part are caused, to influence the variation of conveyer transmission speed, in turn
Influence the accuracy of counting；Secondly as the length that the packed object of different length specification and type is effectively detected is each
Not identical, this requires the packed objects to different length specification and type will carry out the measuring and calculating of fiducial time length parameter,
This adds increased the limitations of the detection method practical application；Again, since the transmission speed of different conveyers is not quite similar, because
This, will individually carry out every conveyer the measuring and calculating of fiducial time length parameter, increase cost.Packed object is transmitting
The display case taken, also will affect it can be effectively recognized out the accuracy for connecting bag quantity in even bag.Due to upper
The presence of factor is stated, although joined one in the fiducial time length parameter of measuring and calculating and connect the confirmation of bag quantity to object during
A little compensation data algorithms, but still cannot the effective company's of identifying bag quantity, affect 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, counts quasi-
True property is weak, therefore, in addition in the production and outbound of the enterprises such as grain, cement, chemical fertilizer, salt industry, feed, sugar industry, chemical industry, building materials
Outside commonly used counter, the field of circulation the most active is substantially using artificial counting in these industries.In addition, for
The packed object for loading in mixture different length specification in batches in transmission belt is realized in grain circulation field, lacks reliable meter at present
Number detection method, this is exactly that the application needs place improved emphatically.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of belt conveyor different size that count accuracy is high
Object batch loads in mixture the count detection method of transmission.
For the technical problem more than solving, the present invention provides a kind of belt conveyor different size object batches to load in mixture
The count detection method of transmission, three pairs of correlation type photoelectricity of interval setting on the upper side frame of the transmission belt two sides of belt conveyor
Switch, each pair of optoelectronic switch are in position is penetrated, and optoelectronic switch is connect with counting control unit, and three pairs of optoelectronic switches are simultaneously to logical
The conveying objects for crossing detection zone are detected, according to the distance between three detection location points and conveying objects by accordingly examining
The time of measuring point measures the average transmission speed of transmission belt, calculates transmission in the runing time of each test point according to conveying objects
The actually detected length M of objectIt surveys, the sequencing of level jump and its maintenance when passing through three pairs of optoelectronic switches according to conveying objects
Low level situation identifies the specification type of detected packed object, according to η=MIt surveys/MBenchmark, obtain the number of conveying objects
Amount, and accumulated counts are carried out respectively according to corresponding specification type.
Different size type of object of the present invention is divided into two major classes, and one kind is small dimension type, and one kind is big specification
Type.
Batch of the present invention loads in mixture, and refers in the same counting operation, can carry out the object of two kinds of specification types
By loading in mixture in batches, and count respectively.The specification type refers to that the type of object is identical, and theoretical length is also identical.Described
Batch refer to, load in mixture count operation in every time on conveyer place same specification type physical quantities be no less than six.
In the distance between first pair of optoelectronic switch and second pair of optoelectronic switch L1≤small dimension type transfers object
Minimum gauge object length × (1- γ), second pair of optoelectronic switch and third are to the distance between optoelectronic switch L2≤big specification
Minimum gauge object length × (1- γ)-L1 in type transfers object, and the maximum specification in small dimension type transfers object
Object length≤(L1+L2) × (1- γ) and L2 > L1, wherein γ is penalty coefficient, value range 0.15-0.3.
Quantity η=M of the conveying objectsIt surveys/MBenchmark, wherein MBenchmarkBase for the conveying objects set in counting control unit
Standard length, MIt surveysFor the actually detected length value of conveying objects；η is integer, and it is as follows to be rounded rule:
1) when the integer part of fractional part >=0.43, η of η adds 1, fractions omitted part；
2) as the fractional part < 0.43 of η, the integer part of η is constant, fractions omitted part.
The MIt surveys=L1+(L1/t0) * t1 0Or MIt surveys=(L1+L2)+(L2/t2) * t1 1, in which:
t0Transmission time for conveying objects from first pair of optoelectronic switch to second pair of optoelectronic switch；
t1For conveying objects from first pair of optoelectronic switch to third to the transmission time of optoelectronic switch；
t2For conveying objects from second pair of optoelectronic switch to third to the transmission time of optoelectronic switch；
t1 0It is the parameter for detecting small dimension type transfers object, when passing through for conveying objects, is produced in first pair of optoelectronic switch
Before raw second of level jump, conveying objects pass through the transmission time of second pair of optoelectronic switch；
t1 1It is the parameter for detecting big specification type transfers object, when passing through for conveying objects, is produced in first pair of optoelectronic switch
Before raw second of level jump, conveying objects are by third to the transmission time of optoelectronic switch；
t0、t1 0 、t1、t1 1And t2It detects to obtain according to the time to optoelectronic switch level jump by counting control unit.
The MBenchmarkIncluding MSmall benchmarkAnd MBig benchmark, wherein MSmall 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.MBenchmarkIndependent to count first five single-piece object measured in operation to be each
The average value of the detection length of body is set in counting control unit as datum length.
The present invention is that the influence of exclusive PCR factor is arranged corresponding interference time length and adds in counting control unit
To ignore.In each individual counting operation, when completing the counting of first single-piece conveying objects, counting control unit
Transmission belt is measured from first test point to the time numerical value of second test point, according to setting automatic inside counting control unit
12% good t0Relationship (wherein t0 When passing through optoelectronic switch for first conveying objects of the specification type in each counting operation
The t measured0Value) a period numerical value is calculated, it is arranged in counting control unit as basic parameter, in this, as detection
To interference time length ignored, with the influence of exclusive PCR factor.
Superior effect of invention is:
1) count detection method of the invention can be realized to the accurate counting of single length specification conveying objects and right
Two kinds of different length specification type transfers objects press corresponding specification type accurate counting in mixed assembly line respectively, completely
Foot client diversified demand；
2) to the packed object of single length specification, can efficiently identify out is single-piece or even bag, and the even number of bag
Amount；
3) the packed object of two kinds of different length specifications is carried out efficiently identifying its specification class in mixed assembly line
Type quantity, i.e., the quantity of big specification type and small dimension type, and accurately counted by corresponding specification type；
4) corresponding interference time length is set and is ignored the influence for carrying out exclusive PCR factor, and single conveying objects
Datum length MBenchmarkParameter, it is ensured that the accuracy of counting, so that counting operation simplifies, it is easy to promote and utilize；
5) count detection method of the present invention improves the accuracy of counting, can expand the utilization rate of counting device, effectively
Save human cost in ground；
6) present invention is capable of the average transmission speed of effectively measuring transmission belt out, improves the essence that detection connects bag number
Degree realizes accurate metering；
7) it is examined using the operation conditions that three pairs of correlation type optoelectronic switches detect location point by three to conveying objects
It surveys, it is more accurate with this calculated transmission belt average speed, make the actually detected length M of conveying objectsIt surveysIt is more accurate, really
The accuracy counted is protected.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic illustration one of detection method；
Fig. 3 is the schematic illustration two of detection method；
Figure label explanation
1-belt conveyor；
101- rack upper side frame；102- transmission belt；
The mounting bracket of 2- optoelectronic switch；3- conveying objects；
4A, 4B, 4C-correlation type optoelectronic switch；
T-object passes through the transmission time of test point A, for small dimension object, t=t1 0 + t0；For big specification object
Body, t=t1 1 + t1 ；
V-transmission belt average transmission speed；
V0 Average transmission speed when transmission belt runs to test point B from test point A；
V1 Average transmission speed when transmission belt runs to test point C from test point A；
V2 Average transmission speed when transmission belt runs to test point C from test point B.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
The embodiment that the invention will now be described in detail with reference to the accompanying drawings, the present invention by taking the normally closed optoelectronic switch of correlation type NPN as an example,
The normally closed optoelectronic switch of correlation type NPN is in high level state when no object blocks, and low level shape is in when there is object to block
State.
As shown in Figure 1, Figure 2 and Figure 3, on the rack two sides upper side frame 101 of belt conveyor 1, detection appropriate is selected
Location point A, and be determining detection location point B at L1 away from A point distance along the transmission direction of transmission belt as datum mark, then with
Based on B point, the transmission direction along transmission belt determines detection location point C away from detection location point B distance at L2.It is detecting respectively
At point A, B, C, the mounting bracket 2 of optoelectronic switch is fixed in the suitable position of machine frame at two sides upper side frame 101, by correlation type light
Electric switch 4 finely tunes the position of optoelectronic switch, so that two in each measurement point optoelectronic switch is in mounting bracket 2
To penetrating position.
Belt conveyor 1 detect to institute's conveying objects by counting control unit obtains corresponding detection data,
And operation and processing realization Counts are carried out to these data by counting control unit.When carrying out counting operation, starting is passed
Defeated machine control unit operates belt conveyor 1, conveying objects 3 is put on transmission belt 102, conveying objects 3 are followed by biography
The operating of defeated belt 102 and moved, and successively after testing point A, B, correlation type optoelectronic switch 4A, 4B on location of C,
4C, detected corresponding testing number when counting control unit passes through correlation type optoelectronic switch 4A, 4B, 4C according to conveying objects 3
According to, and operation and processing are carried out to these data by counting control unit, identify the specification of detected conveying objects 3
Type and its corresponding quantity, and accumulated counts work is carried out respectively by the specification type identified.
Using test point A as datum mark, i.e., as the confirmation point for counting job run beginning and end.Conveying objects 3 are opened
When beginning passes through, optoelectronic switch 4A is low level by high level jump, starts a new counting operational process, when conveying objects 3
When leaving, optoelectronic switch 4A is high level by low level jump, terminates a counting operational process, and pass through counting control unit
Operation and processing to detection data carry out accumulated counts by the specification type of the conveying objects identified respectively.
In order to realize accurate metering, the datum length M of single-piece detection object is setBenchmarkAnd insignificant distracter time is long
Degree.In addition, set restrictive job requirements, i.e., when transmit operation, toward transmission belt on placement conveying objects when should accomplish: 1)
When only carrying out a kind of object count operation of length specification, the object of first placement is protected 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 convenient for identification even bag
Type then needs first of every batch of object to want individually placed with the last one, that is to say, that can neither be with the transmission object of front
Body is connected, and can not be connected with subsequent conveying objects.
The setting of the distracter time span: it in each individual counting operation, is passed when completing first single-piece
When the counting of defeated object, counting control unit measures transmission belt from first test point to the time numerical value of second test point,
According to 12% t set automatically inside counting control unit0Relationship, wherein t0 For the specification type in each counting operation
First conveying objects passes through the t measured when optoelectronic switch0Value, calculates a period numerical value, is arranged as basic parameter
In counting control unit, in this, as the interference time length detected.
Different size type of object of the present invention is divided into two major classes, and one kind is small dimension type, and one kind is big specification
Type.
Batch of the present invention loads in mixture, and refers in the same counting operation, can carry out the object of two kinds of specification types
By loading in mixture in batches, and count respectively.The specification type refers to that the type of object is identical, and theoretical length is also identical.Described
Batch refer to, load in mixture count operation in every time on conveyer place same specification type physical quantities be no less than six.
Set the minimum gauge in the distance between the test point A and test point B L1≤small dimension type transfers object
Object length × (1- γ), second pair of optoelectronic switch and third are to the distance between optoelectronic switch L2≤big specification type transfers object
Minimum gauge object length × (1- γ)-L1 in body, and the maximum specification object length in small dimension type transfers object≤
(L1+L2) × (1- γ) and L2 > L1, wherein γ is penalty coefficient, value range 0.15-0.3.
The MBenchmarkIncluding MSmall benchmarkAnd MBig benchmark, wherein MSmall 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.MBenchmarkIndependent to count first five single-piece object measured in operation to be each
The average value of the detection length of body is set in counting control unit as datum length.
The conveying objects datum length MBenchmarkDetermination: according to the restrictive job requirements of the setting, in each meter
In number operation, first conveying objects of detected each specification type are single-pieces.According to first conveying objects by pair
Its potential change situation when emitting optoelectronic switch 4A, 4B and 4C, the specification type of conveying objects is identified by counting control unit
And accumulated counts are carried out, meanwhile, counting control unit selects corresponding M according to the conveying objects specification type of identificationIt surveys= L1 +
(L1/t0) * t1 0(small dimension type transfers object) or MIt surveys=(L1+L2)+(L2/t2) * t1 1(big specification type passes
Defeated object) calculate the detection length M of the specification type of objectIt surveys, specification type transfers of the same race as the next detection of determination
The datum length M of physical quantitiesBenchmark.In addition, counting control unit calculates automatically after detecting first conveying objects
The average detected length of all same specification type of object currently detected is as datum length MBenchmark, next of the same race to determine
The quantity of the conveying objects of specification type.Such as, after counting control unit detects third part conveying objects, counting control unit
Automatically the average detected length of the two pieces single object currently detected is calculated as datum length MBenchmark, to determine third
The quantity of conveying objects.Such as, after counting control unit detects the 4th conveying objects, counting control unit calculates automatically
The length of the third part single object currently detected and the average detected length of preceding two pieces object are average again, as datum length
MBenchmark, to determine the quantity of the 4th conveying objects.And so on, until calculating being averaged for first five the type single object
Length is detected, as datum length MBenchmarkIt is automatically set into counting control unit as after and determines that the specification type detection passes
The underlying parameter of defeated physical quantities.
If counting control unit is in automatic detection setting MBenchmarkIn the process, due to there is even bag, so that last time detects
When obtained accumulated quantity when being more than 5, then it is long as benchmark that single-piece detection object average length is calculated by the accumulated quantity
Spend MBenchmark。
MIt surveys=L1+(L1/t0) * t1 0Or MIt surveys=(L1+L2)+(L2/t2) * t1 1, in which:
t0Transmission time for conveying objects from first pair of optoelectronic switch to second pair of optoelectronic switch；
t1For conveying objects from first pair of optoelectronic switch to third to the transmission time of optoelectronic switch；
t2For conveying objects from second pair of optoelectronic switch to third to the transmission time of optoelectronic switch；
t1 0It is the parameter for detecting small dimension type transfers object, when passing through for conveying objects, is produced in first pair of optoelectronic switch
Before raw second of level jump, conveying objects pass through the transmission time of second pair of optoelectronic switch；
t1 1It is the parameter for detecting big specification type transfers object, when passing through for conveying objects, is produced in first pair of optoelectronic switch
Before raw second of level jump, conveying objects are by third to the transmission time of optoelectronic switch；
t0、t1 0 、t1、t1 1And t2It detects to obtain according to the time of optoelectronic switch level jump by counting control unit.
The MIt surveysCalculation formula and MBenchmarkWhen being passed through by counting control unit according to detection three to penetrate optoelectronic switch level become
Change situation to be determined:
1) when conveying objects successively pass through optoelectronic switch 4A, 4B, optoelectronic switch 4A, 4B are successively successively undergone by high level
Jump is low level, and maintains low level state simultaneously, if to light since optoelectronic switch 4A, 4B maintain low level state simultaneously
Between electric switch 4A jumps to high period by low level, optoelectronic switch 4C is not undergone from high level to low level jump, then is sentenced
Make this time detect be the single packed object of small dimension type either two packed objects of small dimension type company's bag, root
The actually detected length M of packed object is calculated according to Fig. 2It surveys:
I.e. by V0=L1 / t0= MIt surveys/ t = MIt surveys/ (t1 0 + t0), release MIt surveys=L1+(L1/t0) * t1 0, wherein
t1 0 And t0 It can be detected automatically by counting control unit.
Thus it obtains, quantity η=M of conveying objectsIt surveys/MSmall benchmark, wherein MSmall benchmarkFor the small rule set in counting control unit
The datum length of lattice type transfers object, MIt surveysFor the actually detected length of conveying objects；η is integer, and it is as follows to be rounded rule:
1. when the integer part of fractional part >=0.43, η of η adds 1, fractions omitted part；
2. as the fractional part < 0.43 of η, the integer part of η is constant, fractions omitted part.
2) when conveying objects successively pass through optoelectronic switch 4A, 4B, optoelectronic switch 4A, 4B are successively successively undergone by high level
Jump is low level, and maintains low level state simultaneously, if to light since optoelectronic switch 4A, 4B maintain low level state simultaneously
Between electric switch 4A jumps to high period by low level, optoelectronic switch 4C is also undergone from high level to low level jump, and with
Optoelectronic switch 4A, 4B maintain low level state simultaneously, then can determine whether the type of institute's detection object are as follows: single big specification type object
Body, two or more big specification type of object interconnected, or be interconnected two or more
Small dimension type of object calculate according to Fig. 3 the actually detected length M of conveying objectsIt surveys
I.e. by V1=(L1+L2)/t1= MIt surveys/ t =MIt surveys/ (t1 1 + t1)=L2 / t2It obtains:
MIt surveys=(L1+L2)+(L1+L2/t1) * t1 1=(L1+L2)+(L1/t2) * t1 1；
The MBenchmarkSelection: when the conveying objects of previous detection are big specification type of object, calculate current detection object
M is selected when quantityBig benchmark.When the conveying objects of previous detection are that small dimension type of object is, according to the binding character of the setting
Conveying objects working condition is filled in job requirements and belt conveyor to pass through simultaneously by storing up current detection object in advance
Continuous two detection objects after which are identified, to determine that the detection conveying objects are big specification types or small
Specification type of object, counting control unit choose corresponding M according to the specification type identified automaticallyBenchmark。
Thus it obtains, quantity η=M of conveying objectsIt surveys/MBenchmark, wherein MBenchmarkFor the transmission object set in counting control unit
The datum length of body, counting control unit automatically select corresponding M according to the specification type of the conveying objects identifiedSmall benchmarkOr
MBig benchmark, MIt surveysFor the actually detected length value of conveying objects；η is integer, and it is as follows to be rounded rule:
1. when the integer part of fractional part >=0.43, η of η adds 1, fractions omitted part；
2. as the fractional part < 0.43 of η, the integer part of η is constant, fractions omitted part.
The foregoing is merely preferred embodiments of the invention, are not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of belt conveyor different size object batch loads in mixture the count detection method of transmission, in the transmission of belt conveyor
Setting three pairs of infrared opposite-radiation type optoelectronic switches in interval on the upper side frame of belt two sides, each pair of optoelectronic switch are in penetrating position,
Optoelectronic switch is connect with counting control unit, and three pairs of optoelectronic switches are detected to by the conveying objects of detection zone 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 calculates the actually detected length M of conveying objects according to conveying objects in the runing time of each test pointIt surveys, according to biography
The sequencing of level jump and its low level situation of maintenance, are identified detected when defeated object passes through three pairs of optoelectronic switches
The specification type of packed object, the above conveying objects are multiple single objects, according to η=MIt surveys/MBenchmark, obtain the quantity of conveying objects
η, wherein MBenchmarkDatum length for the conveying objects set in counting control unit, and according to corresponding specification type respectively into
Row counts；
The MIt surveys=L1+(L1/t0) * t1 0Or MIt surveys=(L1+L2)+(L2/t2) * t1 1, in which:
t0Transmission for each single object for counting the same specification in operation from first pair of optoelectronic switch to second pair of optoelectronic switch
Time；
t2Transmission for each single object for counting the same specification in operation from second pair of optoelectronic switch to third to optoelectronic switch
Time；
t1 0It is the parameter for detecting small dimension type single object, when passing through for single object, generates the in first pair of optoelectronic switch
Before secondary level jump, single object passes through the transmission time of second pair of optoelectronic switch；
t1 1It is the parameter for detecting big specification type single object, when passing through for single object, generates the in first pair of optoelectronic switch
Before secondary level jump, single object is by third to the transmission time of optoelectronic switch；
t0、t1 0 、t1 1And t2It detects to obtain according to the time for penetrating optoelectronic switch level jump by counting control unit；
The MBenchmarkIncluding MSmall benchmarkAnd MBig benchmark, MSmall benchmarkRefer to the datum length of small dimension single object, MBig benchmarkRefer to big specification single-piece
The datum length of object, MBenchmarkFor each independent detection length for counting first five same specification single object measured in operation
Average value as datum length, be set in counting control unit；
L1 is the distance between first pair of optoelectronic switch and second pair of optoelectronic switch；
L2 is second pair of optoelectronic switch and third to the distance between optoelectronic switch.
2. belt conveyor different size object batch according to claim 1 loads in mixture the count detection method of transmission,
It is characterized in that: in the distance between first pair of optoelectronic switch and second pair of optoelectronic switch L1≤small dimension type transfers object
Minimum gauge object length × (1- γ), second pair of optoelectronic switch and third are to the distance between optoelectronic switch L2≤big specification
Minimum gauge object length × (1- γ)-L1 in type transfers object, and the maximum specification in small dimension type transfers object
Object length≤(L1+L2) × (1- γ) and L2 > L1, wherein γ is penalty coefficient, value range 0.15-0.3.
3. belt conveyor different size object batch according to claim 1 loads in mixture the count detection method of transmission,
It is characterized in that: quantity η=M of the single objectIt surveys/MBenchmark, η is integer, it is as follows to be rounded rule:
When the integer part of fractional part >=0.43, η of η adds 1, fractions omitted part；
As the fractional part < 0.43 of η, the integer part of η is constant, fractions omitted part.
4. belt conveyor different size object batch according to claim 1 loads in mixture the count detection method of transmission,
It is characterized in that: in the counting control unit, corresponding interference time length being set and is ignored, with exclusive PCR because of prime implicant pair
The influence of detection and the identification of conveying objects.
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 |
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