CN107091677A - A kind of error compensating method and the belt conveyer scale based on error compensation - Google Patents
A kind of error compensating method and the belt conveyer scale based on error compensation Download PDFInfo
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- CN107091677A CN107091677A CN201710234879.XA CN201710234879A CN107091677A CN 107091677 A CN107091677 A CN 107091677A CN 201710234879 A CN201710234879 A CN 201710234879A CN 107091677 A CN107091677 A CN 107091677A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/006—Special taring or checking devices therefor
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Abstract
The present invention provides a kind of error compensating method：The first weighing-up wave and the second weighing-up wave of acquisition are compensated, weighing-up wave F is compensated3=(F1×D2‑F2×D1)/(D2‑D1).The present invention, which also provides the belt conveyer scale based on error compensation, to be included：First weighing unit, the second weighing unit, velocity sensor, compensating unit, weighing instrument；Or, first weighing unit, the second weighing unit, velocity sensor, compensation weighing unit；Compensating unit or compensation weighing unit are compensated to the first weighing-up wave with the second weighing-up wave.Meanwhile, whether compensating unit, weighing instrument or compensation weighing unit also judge material as same batch materials, and weighing instrument or compensation weighing unit are instantaneously weighed to same batch materials and carry out accumulative summation, obtain and show conveying material gross weight.The present invention has accuracy high, repeated with the features such as durability is preferable, cost is relatively low, can be widely applied to the fields such as metering.
Description
Technical field
The present invention relates to a kind of automatic weighing technology, more particularly to a kind of error compensating method and based on error compensation
Belt conveyer scale.
Background technology
During ribbon conveyer continuous conveying material, conveyer belt and its carried material need to enter by belted electronic balance
Row is weighed：The gross mass of conveyer belt and its carried material subtracts belt quality and obtains quality of material；It is accumulative by consecutive weighings,
The gross mass of all transported material material can be obtained.In actual applications, because conveyer belt is continuously belted electronic balance
The conveyer belt of residing Weighing Area can not be separated with non-Weighing Area conveyer belt, thus the weighing sensor of belted electronic balance is detected
To conveyer belt and its gross mass of carried material can be influenceed by adjacent non-Weighing Area conveyer belt and material, produce " skin
Band effect ".That is, belt effect refers to belt tension, conveyer belt modulus of elasticity, conveyer belt cross sectional moment of inertia, title
The change of the parameters such as the non-aligned degree of great trust roller is to the synthesis non-linear effects caused by weighing accuracy.
The power calculation formula of weighing of belted electronic balance known to industry is：F=nqLgcos θ+2TKD/L；Wherein, F is to weigh
Power, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is Inclination of the conveyer,
T is belt tension, and K is conveyer belt effect coefficient, and D is the non-aligned degree of weighing carrier roller.In the formula, " 2TKD/L " one is
Error term caused by belt effect.Error caused by belt effect not only have nonlinear characteristic, and with material conveying capacity it
Between corresponding relation do not know.Therefore, in actual applications, belt effect cause the weighing accuracy of belt conveyer scale, it is repeatability, resistance to
The drifts such as long property are indefinite, and a series of trouble is all brought to manufacturer and user.To solve this series of trouble, a side
The influence of belt effect is made every effort to reduce in face, and accurate installation and adjustment are carried out to belted electronic balance, is wasted time and energy, inefficiency；
On the other hand carry out actual material calibration continually to belted electronic balance, of a high price.Nevertheless, the standard of weighing of belted electronic balance
Exactness and durability are still unsatisfactory, hinder the popularization and application of belted electronic balance, are especially dfficult to apply to trade settlement etc.
Important events.
Further to solve belt effect problem, this area researcher develops a variety of improvement belted electronic balances and weighed standard
The methods and techniques of exactness, are generally divided into three classes：The first kind is to try to reduce each factor absolute value for causing belt effect, example
Such as, regulation belted electronic balance is necessarily mounted at the minimum position of conveyer belt carrying section tension force, reduces non-aligned degree of weighing carrier roller etc.；
Equations of The Second Kind is to try to make each factor value for causing belt effect to keep constant, by the range of range of weighing multiple spot calibration subtract
Its light influence, for example, regulation belted electronic balance is necessarily mounted at the minimum position of conveyer belt carrying section tension variation, control belt
Tensile force makes it keep constant etc.；3rd class is the accounting for improving quality of material in weighing-up wave, so that relatively reduced belt
The influence of effect, section length etc. for example, increase weighing carrier roller quantity, lengthening are weighed.In fact, this three classes measure is substantially phase
With, all it is to make every effort to reduce Error Absolute Value caused by belt effect, it is impossible to fundamentally thoroughly eliminate belt effect.
As can be seen here, in the prior art, belted electronic balance relatively low, the peace that there is weighing accuracy, repeatability, durability
Dress, adjustment are with calibrating the problems such as cost height.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of degree of accuracy it is higher, it is repeated with durability preferably, into
This relatively low error compensating method and the belt conveyer scale based on error compensation.
In order to achieve the above object, error compensating method proposed by the present invention is：
A kind of error compensating method, be specially：
Step 1, the first weighing-up wave F for obtaining the transmission of the first weighing unit1=nqLgcos θ+2TKD1/L；Wherein, n is
Weighing carrier roller group number, q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is Inclination of the conveyer, and T is skin
Belt tension, K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Step 2, the second weighing-up wave F for obtaining the transmission of the second weighing unit2=nqLgcos θ+2TKD2/L；Wherein, D2For
The non-aligned degree of the weighing carrier roller of second weighing unit.
Step 3, acquisition compensation weighing signal F3=(F1×D2-F2×D1)/(D2-D1)；Wherein, D2≠D1。
In summary, error compensating method of the present invention is compensated to the first weighing-up wave with the second weighing-up wave
Afterwards, the error term " 2TKD/L " in calculating formula F of weighing=nqLgcos θ+2TKD/L can effectively be eliminated.So, by mending
What measurement was obtained after repaying weigh no longer has the degree of accuracy, repeatability because of outside fluid influence, durability is low asks
Topic.Therefore, error compensating method of the present invention has the characteristics of degree of accuracy is higher.
In order to achieve the above object, the first technical scheme of the belt conveyer scale proposed by the present invention based on error compensation is：
A kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, benefit
Repay unit, weighing instrument；Wherein, the first weighing unit and the second weighing unit are set along belt direction of transfer, and first weighs
Spacing between unit and the second weighing unit is s.
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay unit；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is defeated
Machine inclination angle is sent, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay unit；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor, for will detect that obtained belt transfer rate v is sent to compensating unit；
Compensating unit, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1,
Two weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt transmission sent according to velocity sensor
Distance s between speed v, the first weighing unit and the second weighing unit obtain material and run by the first weighing unit position to the
Δ t the time required to two weighing unit positions, judges that first weighs time t1, second weigh time t2Between time difference t1-t2With thing
Expect whether run time Δ t is equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through
The material of second weighing unit is same material, afterwards, to the first weighing-up wave F1, the second weighing-up wave F2It is modified compensation,
It is compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Send to weighing instrument；Wherein,
D2≠D1。。
Weighing instrument, for the compensation weighing signal F sent according to compensating unit3Material instantaneous weight is obtained, adding up should
The material gross weight that the instantaneous weight of material and display are accumulated by.
In summary, in the corresponding belt conveyer scale based on error compensation of first scheme of the present invention, compensating unit is to
, can be by the mistake in calculating formula F of weighing=nqLgcos θ+2TKD/L after one weighing-up wave and the second weighing-up wave are compensated
Poor item " 2TKD/L " effectively eliminates.So, the weighing no longer because outside fluid influence of obtaining of measurement after overcompensation
And the problem of there is the degree of accuracy, repeatability, low durability.Therefore, the first composition structure of the present invention is corresponding based on mistake
The belt conveyer scale of difference compensation has that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
In order to achieve the above object, the second technical scheme of the belt conveyer scale proposed by the present invention based on error compensation is：
A kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, benefit
Repay unit, weighing instrument；Wherein, the first weighing unit and the second weighing unit are set along belt direction of transfer, and first weighs
Spacing between unit and the second weighing unit is s.
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay unit；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is defeated
Machine inclination angle is sent, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay unit；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor, for will detect that obtained belt transfer rate v is sent to weighing instrument.
Compensating unit, for the compensating instruction sent according to weighing instrument, to the first weighing-up wave F1, the second weighing-up wave
F2Compensation is modified, weighing-up wave F is compensated3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Send
To weighing instrument；Wherein, D2≠D1。
Weighing instrument, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1,
Two weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt transmission sent according to velocity sensor
Distance s between speed v, the first weighing unit and the second weighing unit obtain material and run by the first weighing unit position to the
Δ t the time required to two weighing unit positions, judges that first weighs time t1, second weigh time t2Between time difference t1-t2With thing
Expect whether run time Δ t is equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through
The material of second weighing unit is same material, and sends compensating instruction to compensating unit；The compensation sent according to compensating unit
Weighing-up wave F3Material instantaneous weight is obtained, the material gross weight that the instantaneous weight for adding up the material and display are accumulated by.
In summary, in the corresponding belt conveyer scale based on error compensation of alternative plan of the present invention, compensating unit is to
, can be by the mistake in calculating formula F of weighing=nqLgcos θ+2TKD/L after one weighing-up wave and the second weighing-up wave are compensated
Poor item " 2TKD/L " effectively eliminates.So, the weighing no longer because outside fluid influence of obtaining of measurement after overcompensation
And the problem of there is the degree of accuracy, repeatability, low durability.Therefore, alternative plan of the present invention is corresponding is based on error compensation
Belt conveyer scale have that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
In order to achieve the above object, the 3rd technical scheme of the belt conveyer scale proposed by the present invention based on error compensation is：
A kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, benefit
Repay weighing unit；Wherein, the first weighing unit and the second weighing unit are set along belt direction of transfer, and the first weighing unit with
Spacing between second weighing unit is s.
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay weighing unit；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, θ
For Inclination of the conveyer, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay weighing unit；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor, for will detect that obtained belt transfer rate v is sent to compensation weighing unit.
Compensation weighing unit, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh the time
t1, the second weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt sent according to velocity sensor
Distance s between transfer rate v, the first weighing unit and the second weighing unit obtain material and run by the first weighing unit position
To Δ t the time required to the second weighing unit position, judge that first weighs time t1, second weigh time t2Between time difference t1-t2
It is whether equal with material run time Δ t：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment
It is same material by the material of the second weighing unit, afterwards, to the first weighing-up wave F1, the second weighing-up wave F2It is modified
Compensation, is compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1)；According to compensation weighing signal F3Obtain material instantaneous
Weight, the material gross weight that the instantaneous weight and display for adding up the material are accumulated by；Wherein, D2≠D1。
In summary, in the corresponding belt conveyer scale based on error compensation of third program of the present invention, compensation weighing unit
After being compensated to the first weighing-up wave and the second weighing-up wave, in the calculating formula F that will can weigh=nqLgcos θ+2TKD/L
Error term " 2TKD/L " effectively eliminate.So, the weighing no longer because outside fluid of obtaining of measurement after overcompensation
The problem of influenceing and there is the degree of accuracy, repeatability, low durability.Therefore, third program of the present invention is corresponding is based on error
The belt conveyer scale of compensation has that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of error compensating method of the present invention.
The first composition structural representation of Fig. 2 belt conveyer scales of the present invention based on error compensation.
Fig. 3 is second of composition structural representation of the belt conveyer scale of the present invention based on error compensation.
Fig. 4 is the third composition structural representation of the belt conveyer scale of the present invention based on error compensation.
Embodiment
It is right below in conjunction with the accompanying drawings and the specific embodiments to make the object, technical solutions and advantages of the present invention clearer
The present invention is described in further detail.
Fig. 1 is the schematic flow sheet of error compensating method of the present invention.As shown in figure 1, error compensation of the present invention
Method, be specially：
Step 1, the first weighing-up wave F for obtaining the transmission of the first weighing unit1=nqLgcos θ+2TKD1/L；Wherein, n is
Weighing carrier roller group number, q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is Inclination of the conveyer, and T is skin
Belt tension, K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Step 2, the second weighing-up wave F for obtaining the transmission of the second weighing unit2=nqLgcos θ+2TKD2/L；Wherein, D2For
The non-aligned degree of the weighing carrier roller of second weighing unit.
Step 3, acquisition compensation weighing signal F3=(F1×D2-F2×D1)/(D2-D1)；Wherein, D2≠D1。
In a word, can after error compensating method of the present invention is compensated to the first weighing-up wave and the second weighing-up wave
So that the error term " 2TKD/L " in calculating formula F of weighing=nqLgcos θ+2TKD/L effectively to be eliminated.So, after overcompensation
Measure obtained the problem of no longer there is the degree of accuracy, repeatability, low durability because of outside fluid influence of weighing.Cause
This, error compensating method of the present invention has the characteristics of degree of accuracy is higher.
Fig. 2 is the first composition structural representation of the belt conveyer scale of the present invention based on error compensation.As shown in Fig. 2
Belt conveyer scale of the present invention based on error compensation includes：First weighing unit 1, the second weighing unit 5, velocity sensor 2, benefit
Repay unit 4, weighing instrument 3；Wherein, the first weighing unit 1 and the second weighing unit 5 are set along belt direction of transfer, and first
Spacing between the weighing unit 5 of weighing unit 1 and second is s；
First weighing unit 1, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay unit 4；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is
Inclination of the conveyer, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit 5, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay unit 4；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor 2, for will detect that obtained belt transfer rate v is sent to compensating unit 4.
Compensating unit 4, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1、
Second weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt sent according to velocity sensor is passed
Send distance s between speed v, the first weighing unit and the second weighing unit obtain material by the first weighing unit position run to
Δ t the time required to second weighing unit position, judges that first weighs time t1, second weigh time t2Between time difference t1-t2With
Whether material run time Δ t is equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through
The material for crossing the second weighing unit is same material, afterwards, to the first weighing-up wave F1, the second weighing-up wave F2It is modified benefit
Repay, be compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Send to weighing instrument 3.
Here, D2≠D1。
Weighing instrument 3, for the compensation weighing signal F sent according to compensating unit 43Material instantaneous weight is obtained, is added up
The material gross weight that the instantaneous weight of the material and display are accumulated by.
In the present invention, material can constantly be conveyed by belt, and weighing instrument 3 can be to the material instantaneous weight on belt
Accumulative summation, is finally accumulated by the gross weight of material.
In the present invention, compensating unit 4, weighing instrument 3 are singlechip controller or programmable controller.
In a word, in the first corresponding belt conveyer scale based on error compensation of composition structure of the present invention, 4 pairs of compensating unit
After first weighing-up wave and the second weighing-up wave are compensated, in the calculating formula F that will can weigh=nqLgcos θ+2TKD/L
Error term " 2TKD/L " is effectively eliminated.So, the weighing no longer because outside fluid shadow of obtaining of measurement after overcompensation
The problem of ringing and there is the degree of accuracy, repeatability, low durability.Therefore, structure is corresponding is based on for the first composition of the present invention
The belt conveyer scale of error compensation has that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
Fig. 3 is second of composition structural representation of the belt conveyer scale of the present invention based on error compensation.As shown in figure 3,
Belt conveyer scale of the present invention based on error compensation includes：First weighing unit 1, the second weighing unit 5, velocity sensor 2, benefit
Repay unit 8, weighing instrument 7；Wherein, the first weighing unit 1 and the second weighing unit 5 are set along belt direction of transfer, and first
Spacing between the weighing unit 5 of weighing unit 1 and second is s.
First weighing unit 1, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay unit 8；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is
Inclination of the conveyer, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit 5, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay unit 8；Wherein, D2 is the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor 2, for will detect that obtained belt transfer rate v is sent to weighing instrument 3.
Compensating unit 8, for the compensating instruction sent according to weighing instrument 7, to the first weighing-up wave F1, second weigh letter
Number F2Compensation is modified, weighing-up wave F is compensated3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Hair
Deliver to weighing instrument 7；Wherein, D2≠D1。
Weighing instrument 7, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1、
Second weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt sent according to velocity sensor is passed
Send distance s between speed v, the first weighing unit and the second weighing unit obtain material by the first weighing unit position run to
Δ t the time required to second weighing unit position, judges that first weighs time t1, second weigh time t2Between time difference t1-t2With
Whether material run time Δ t is equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through
The material for crossing the second weighing unit is same material, and sends compensating instruction to compensating unit 8；Sent according to compensating unit 8
Compensation weighing signal F3Material instantaneous weight is obtained, the material gross weight that the instantaneous weight for adding up the material and display are accumulated by
Amount.
In the present invention, material can constantly be conveyed by belt, and weighing instrument 7 can be to the material instantaneous weight on belt
Accumulative summation, is finally accumulated by the gross weight of material.
In the present invention, compensating unit 8, weighing instrument 7 are singlechip controller or programmable controller.
In a word, in the corresponding belt conveyer scale based on error compensation of second of composition structure of the present invention, 7 pairs of compensating unit
After first weighing-up wave and the second weighing-up wave are compensated, in the calculating formula F that will can weigh=nqLgcos θ+2TKD/L
Error term " 2TKD/L " is effectively eliminated.So, the weighing no longer because outside fluid shadow of obtaining of measurement after overcompensation
The problem of ringing and there is the degree of accuracy, repeatability, low durability.Therefore, structure is corresponding is based on for second of composition of the present invention
The belt conveyer scale of error compensation has that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
Fig. 4 is the third composition structural representation of the belt conveyer scale of the present invention based on error compensation.As shown in figure 4,
A kind of belt conveyer scale based on error compensation of the present invention includes：First weighing unit 1, the second weighing unit 5, velocity sensor
2nd, compensation weighing unit 6；Wherein, the first weighing unit 1 and the second weighing unit 5 are set along belt direction of transfer, and first claims
Spacing between the weighing unit 5 of weight unit 1 and second is s.
First weighing unit 1, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L is sent to benefit
Repay weighing unit 6；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity,
θ is Inclination of the conveyer, and T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit.
Second weighing unit 5, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L is sent to benefit
Repay weighing unit 6；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit.
Velocity sensor 2, for will detect that obtained belt transfer rate v is sent to compensation weighing unit 6.
Compensation weighing unit 6, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh the time
t1, the second weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt sent according to velocity sensor
Distance s between transfer rate v, the first weighing unit and the second weighing unit obtain material and run by the first weighing unit position
To Δ t the time required to the second weighing unit position, judge that first weighs time t1, second weigh time t2Between time difference t1-t2
It is whether equal with material run time Δ t：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment
It is same material by the material of the second weighing unit；Afterwards, to the first weighing-up wave F1, the second weighing-up wave F2It is modified
Compensation, is compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1)；According to compensation weighing signal F3Obtain material instantaneous
Weight, the material gross weight that the instantaneous weight and display for adding up the material are accumulated by；Wherein, D2≠D1。
In the present invention, compensation weighing unit 6 is singlechip controller or programmable controller.
In the present invention, material can constantly be conveyed by belt, and compensation weighing unit 6 can be instantaneous to the material on belt
The accumulative summation of weight, is finally accumulated by the gross weight of material.
In a word, in the third corresponding belt conveyer scale based on error compensation of composition structure of the present invention, compensation weighing list
After member is compensated to the first weighing-up wave and the second weighing-up wave, the calculating formula F that will can weigh=nqLgcos θ+2TKD/L
In error term " 2TKD/L " effectively eliminate.So, the weighing no longer because outside fluid of obtaining of measurement after overcompensation
Influence and the problem of there is the degree of accuracy, repeatability, low durability.Therefore, the third composition structure of the present invention is corresponding
Belt conveyer scale based on error compensation has that the degree of accuracy is higher, repeated preferable with durability, lower-cost feature.
Using above-mentioned error compensating method or the belt conveyer scale based on error compensation with batch sample materials to carrying out experiment of weighing,
Experiment in the case of different belt tensions carries out three experiments, test situation such as table 1 respectively：
The sample materials experiment of weighing record sheet of table 1
As shown in Table 1, although belt tension amplitude of variation is larger, error compensating method pair is based on using of the present invention
After sample materials are weighed, sample materials weight is highly stable, is almost no longer influenceed by belt tension, mistake of the present invention
Poor compensation method can effectively eliminate non-linear shadow fluid caused by belt effect with the belt conveyer scale based on error compensation
Ring, improve weigh accuracy and durability, repeatability.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of error compensating method, it is characterised in that methods described is specially：
Step 1, the first weighing-up wave F for obtaining the transmission of the first weighing unit1=nqLgcos θ+2TKD1/L；Wherein, n is to weigh
Idler machining number, q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is Inclination of the conveyer, and T is belt
Power, K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit；
Step 2, the second weighing-up wave F for obtaining the transmission of the second weighing unit2=nqLgcos θ+2TKD2/L；Wherein, D2For second
The non-aligned degree of the weighing carrier roller of weighing unit；
Step 3, acquisition compensation weighing signal F3=(F1×D2-F2×D1)/(D2-D1)；Wherein, D2≠D1。
2. a kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, it is special
Levy and be, the belt conveyer scale also includes compensating unit, weighing instrument；Wherein, the first weighing unit and the second weighing unit are along skin
Band direction of transfer is set, and the spacing between the first weighing unit and the second weighing unit is s；
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L sends single to compensation
Member；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is conveyer
Inclination angle, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit；
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L sends single to compensation
Member；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit；
Velocity sensor, for will detect that obtained belt transfer rate v is sent to compensating unit；
Compensating unit, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1, second claim
Weight signal F2And receive the second weighing-up wave F2Second weigh time t2；The belt transfer rate sent according to velocity sensor
Distance s between v, the first weighing unit and the second weighing unit, which obtain material and run by the first weighing unit position to second, to be claimed
Δ t the time required to weight cell position, judges that first weighs time t1, second weigh time t2Between time difference t1-t2Transported with material
The row time, whether Δ t was equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through second
The material of weighing unit is same material, afterwards, to the first weighing-up wave F1, the second weighing-up wave F2Compensation is modified, is obtained
Compensation weighing signal F3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Send to weighing instrument；Wherein, D2≠
D1。
Weighing instrument, for the compensation weighing signal F sent according to compensating unit3Material instantaneous weight is obtained, adds up the material
Instantaneous weight simultaneously shows the material gross weight being accumulated by.
3. a kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, it is special
Levy and be, the belt conveyer scale also includes compensating unit, weighing instrument；Wherein, the first weighing unit and the second weighing unit are along skin
Band direction of transfer is set, and the spacing between the first weighing unit and the second weighing unit is s；
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L sends single to compensation
Member；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is conveyer
Inclination angle, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit；
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L sends single to compensation
Member；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit；
Velocity sensor, for will detect that obtained belt transfer rate v is sent to weighing instrument；
Compensating unit, for the compensating instruction sent according to weighing instrument, to the first weighing-up wave F1, the second weighing-up wave F2Enter
Row correction-compensation, is compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1), by compensation weighing signal F3Send to title
Weight instrument；Wherein, D2≠D1。
Weighing instrument, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1, second claim
Weight signal F2And receive the second weighing-up wave F2Second weigh time t2；The belt transfer rate sent according to velocity sensor
Distance s between v, the first weighing unit and the second weighing unit, which obtain material and run by the first weighing unit position to second, to be claimed
Δ t the time required to weight cell position, judges that first weighs time t1, second weigh time t2Between time difference t1-t2Transported with material
The row time, whether Δ t was equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through second
The material of weighing unit is same material, and sends compensating instruction to compensating unit；The compensation weighing sent according to compensating unit
Signal F3Material instantaneous weight is obtained, the material gross weight that the instantaneous weight for adding up the material and display are accumulated by.
4. a kind of belt conveyer scale based on error compensation, including the first weighing unit, the second weighing unit, velocity sensor, it is special
Levy and be, the belt conveyer scale also includes compensation weighing unit；Wherein, the first weighing unit is transmitted with the second weighing unit along belt
Direction is set, and the spacing between the first weighing unit and the second weighing unit is s；
First weighing unit, for the first weighing-up wave F for exporting itself1=nqLgcos θ+2TKD1/ L, which is sent to compensation, to be claimed
Weight unit；Wherein, n is weighing carrier roller group number, and q is load line density of weighing, and L is carrying roller spacing, and g is acceleration of gravity, and θ is defeated
Machine inclination angle is sent, T is belt tension, and K is belt stiffness coefficient, D1For the non-aligned degree of weighing carrier roller of the first weighing unit；
Second weighing unit, for the second weighing-up wave F for exporting itself2=nqLgcos θ+2TKD2/ L, which is sent to compensation, to be claimed
Weight unit；Wherein, D2For the non-aligned degree of weighing carrier roller of the second weighing unit；
Velocity sensor, for will detect that obtained belt transfer rate v is sent to compensation weighing unit；
Compensation weighing unit, for recording the first weighing-up wave F1And receive the first weighing-up wave F1First weigh time t1,
Two weighing-up wave F2And receive the second weighing-up wave F2Second weigh time t2；The belt transmission sent according to velocity sensor
Distance s between speed v, the first weighing unit and the second weighing unit obtain material and run by the first weighing unit position to the
Δ t the time required to two weighing unit positions, judges that first weighs time t1, second weigh time t2Between time difference t1-t2With thing
Expect whether run time Δ t is equal：If equal, show t1Moment passes through the material and t of the first weighing unit2Moment passes through
The material of second weighing unit is same material, afterwards, to the first weighing-up wave F1, the second weighing-up wave F2It is modified compensation,
It is compensated weighing-up wave F3=(F1×D2-F2×D1)/(D2-D1)；According to compensation weighing signal F3Material instantaneous weight is obtained,
The material gross weight that the instantaneous weight and display for adding up the material are accumulated by；Wherein, D2≠D1。
5. the belt conveyer scale based on error compensation according to Claims 2 or 3, it is characterised in that the compensating unit is single
Piece machine controller or programmable controller.
6. the belt conveyer scale based on error compensation according to Claims 2 or 3, it is characterised in that the weighing instrument is single
Piece machine controller or programmable controller.
7. the belt conveyer scale according to claim 4 based on error compensation, it is characterised in that the compensation weighing unit is single
Piece machine controller or programmable controller.
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