CN114076629A - Double vector force electronic belt scale - Google Patents
Double vector force electronic belt scale Download PDFInfo
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- CN114076629A CN114076629A CN202010832740.7A CN202010832740A CN114076629A CN 114076629 A CN114076629 A CN 114076629A CN 202010832740 A CN202010832740 A CN 202010832740A CN 114076629 A CN114076629 A CN 114076629A
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- 238000005303 weighing Methods 0.000 claims abstract description 46
- 230000009977 dual effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 12
- 238000012937 correction Methods 0.000 description 19
- 239000000463 material Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 230000008859 change Effects 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 9
- 238000004422 calculation algorithm Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
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- 238000009795 derivation Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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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
- G01G11/003—Details; specially adapted accessories
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Abstract
The invention provides a dual vector force electronic belt scale, comprising: at least one weighing cell, the weighing cell comprising: unbalance loading power measuring component, belt bearing roller frame, at least one first base and setting are in at least one weight sensor under the first base, unbalance loading power measuring component includes: the belt roller supporting frame comprises a torsion sensor and a second base, wherein the second base is used for bearing the belt roller supporting frame, the torsion sensor is fixed on the first base and connected with the torsion sensor, and the central axis of the second base and the central axis of the torsion sensor are located on the same vertical plane. The double-vector electronic belt scale provided by the invention can improve the metering precision of the electronic belt scale.
Description
Technical Field
The invention relates to the field of metering devices, in particular to a double-vector electronic belt scale.
Background
An electronic belt scale is an automatic weighing apparatus that continuously weighs bulk materials on a conveyor belt without subdividing the mass or interrupting the movement of the conveyor belt. The electronic belt scale has the working principle that the weighing frame is arranged below the upper belt of the belt conveyor, when materials pass through the belt conveyor, the weight of the materials can generate certain pressure, the pressure acts on the weighing sensor in the belt scale frame through the roller frame on the weighing frame to generate voltage signals corresponding to the weight of the materials on the unit length of the belt conveyor, meanwhile, the speed sensor on the belt conveyor measures signals corresponding to the running speed of the belt, and the weighing metering controller calculates the two signals through an integral operation method, so that the instantaneous flow and the accumulated weight value of the materials passing through the belt conveyor are obtained. Therefore, the electronic belt scale is widely applied to continuously metering powder, granules and blocky bulk materials on the belt conveyor in various industrial production.
Electronic belt weighers among the prior art are mostly applied to belt conveyors adopting a groove type carrier roller support structure, belt carrier rollers of groove type belt conveyors generally adopt a two-section type or three-section type carrier roller support structure, three-section type carrier rollers are the most common, central carrier rollers are flat carrier rollers, two inclined carrier rollers are placed at an angle of 35 degrees left and right, the operation of a belt is restrained, when the belt operates, the central line of the belt is consistent with the central line of the carrier rollers, and the belt tension is in a stable state.
However, the belt is easy to deviate when in operation, namely, the central line of the belt deviates from the central line of the carrier roller, and the inclined carrier roller is obliquely arranged, so that the belt deviation changes the equal-height position of the arc line of the belt, thereby causing the tension of the belt to be changed, the pressure intensity of the belt to the inclined carrier roller is changed, at the moment, the vertical component force of the belt to the inclined carrier roller is increased, thereby influencing the correct transmission of the load force of the belt to the belt scale by the belt carrier roller bracket, and the weighing system of the belt scale cannot judge and distinguish the incremental vertical component force generated by the unbalanced tension, and only can count the incremental vertical component force into the weighing and metering operation according to the normal load force, so that the metering accuracy of the belt scale inevitably generates larger accuracy deviation.
Disclosure of Invention
The invention provides a double-vector electronic belt scale, which is used for at least solving the technical problem that the belt scale is low in metering precision due to belt deviation.
In order to achieve the above object, an aspect of the present invention provides a dual-vector force electronic belt scale, including: at least one weighing cell.
The weighing unit includes: the device comprises a bias load force measuring assembly, a belt roller carrier, at least one first base and at least one weight measuring sensor arranged below the first base.
The offset load force measuring assembly includes: the second base is used for bearing the belt roller carrier.
The torsion sensor is fixed on the first base, the second base is connected with the torsion sensor, and the central axis of the second base and the central axis of the torsion sensor are located on the same vertical plane.
In one possible implementation, the dual vector force electronic belt scale further includes: the first bearing seat and the second bearing seat are oppositely arranged on the first base.
The second base is connected between the first bearing seat and the second bearing seat, and the torsion sensor is fixed on one side of the first bearing seat far away from the second base.
Optionally, the number of the first bases is two, and the first bearing seat and the second bearing seat are respectively disposed on the two first bases.
In one possible implementation, the offset force measuring assembly further includes: and the first connecting plate and the second connecting plate are oppositely arranged on the second base.
The first connecting plate is connected with the first bearing seat through a bearing connecting rod, and the second connecting plate is connected with the second bearing seat through a bearing connecting rod.
The torsion sensor is connected with the first connecting plate through a bearing connecting rod.
In one possible implementation, the offset force measuring assembly further includes: a third base fixed on the first base.
One end of the torque sensor is fixedly connected with the third base, and the other end of the torque sensor is connected with the first connecting plate through a bearing connecting rod.
In a possible implementation manner, the number of the weight sensors arranged under each first base is two, and the two weight sensors are oppositely arranged at two ends of the first base.
According to the double-vector electronic belt scale provided by the embodiment of the invention, the offset load measuring assembly is additionally arranged on the first base, the offset load caused by belt deviation is accurately measured, and the weighing error of the double-vector electronic belt scale can be corrected by combining the online force measurement analysis and the weighing and metering accuracy correction method and correction algorithm of the double-vector electronic belt scale, so that the influence of the running working condition of the belt conveyor on the metering accuracy of the double-vector electronic belt scale is eliminated, and the metering accuracy of the double-vector electronic belt scale is improved.
In another aspect, the present invention provides another dual-vector electronic belt scale, including: at least one weighing cell;
the weighing unit includes: the device comprises a partial load force measuring assembly, a belt roller carrier, a first base and at least one weight measuring sensor arranged below the first base, wherein the belt roller carrier is arranged on the first base.
The belt roller frame includes: the second base and set up two oblique bearing rollers and two support frames on the second base.
The offset load force measuring assembly includes: and the two pressure sensors are respectively arranged at the top ends of the two support frames.
Two ends of one of the oblique supporting rollers are respectively and rotatably connected with one of the pressure sensors and the second base, and two ends of the other oblique supporting roller are respectively and rotatably connected with the other pressure sensor and the second base.
In one possible implementation, the offset force measuring assembly further includes: and the unbalance loading force signal processing module is electrically connected with the two pressure sensors.
Optionally, the belt idler frame further comprises: the flat supporting roller and set up first supporting seat, the second supporting seat on the second base.
The flat carrier roller is horizontally and rotatably connected between the first supporting seat and the second supporting seat, two ends of one inclined carrier roller are respectively and rotatably connected with one of the pressure sensors and the first supporting seat, and two ends of the other inclined carrier roller are respectively and rotatably connected with the other of the pressure sensors and the second supporting seat.
Optionally, the number of the weight sensors is two, and the two weight sensors are oppositely arranged at two ends of the first base.
According to the other double-vector electronic belt scale provided by the embodiment of the invention, the offset load measuring assembly is additionally arranged on the belt roller carrier to accurately measure the offset load caused by belt deviation, and the weighing error of the double-vector electronic belt scale can be corrected by combining the online force measurement analysis and the weighing and metering accuracy correction method and correction algorithm of the double-vector electronic belt scale, so that the influence of the running working condition of the belt conveyor on the metering accuracy of the double-vector electronic belt scale is eliminated, and the metering accuracy of the double-vector electronic belt scale is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-vector electronic belt scale according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another dual-vector electronic belt scale according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dual-vector electronic belt scale according to an embodiment of the present invention.
Reference numerals:
100-a weighing unit;
110-an offset force measuring assembly;
111-a torsion sensor;
112-a second base;
1121-first connection plate;
1122-a second connecting plate;
113-an offset load force signal processing module;
120-belt carrier roller frame;
121-inclined carrier rollers;
122-a support frame;
123-flat carrier roller;
124-a first supporting seat;
125-a second support seat;
130-a first base;
131-a first bearing seat;
132-a second bearing housing;
140-a weight sensor;
150-a third base;
160-pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The electronic belt scale is a conventional measuring device applied to a belt conveyor to realize dynamic weighing. The working principle of the belt scale is that a weighing scale frame is arranged below an upper belt of a belt conveyor, when materials pass through the belt conveyor, the weight of the materials can generate certain pressure, the pressure acts on a weighing sensor in the belt scale frame through a roller frame on the weighing scale frame to generate a voltage signal corresponding to the weight of the materials on a unit length of the belt conveyor, and meanwhile, a speed measuring sensor on the belt conveyor measures a signal corresponding to the running speed of the belt. The weighing controller calculates the two signals by an integral operation method, so that the instantaneous flow and the accumulated weight of the materials passing through the belt conveyor are obtained. Therefore, the electronic belt scale is widely applied to continuously metering powder, granules and blocky bulk materials on a belt conveyor in various industrial production. In industrial bulk material conveying sites, a large number of belt conveyors are of the trough-type roller carrier structure type. The belt bearing roller of slot type belt feeder generally adopts two-stage type or syllogic bearing roller frame structure, and two oblique bearing rollers are the U type angle and place to the syllogic bearing roller is most common, and its central bearing roller is flat bearing roller, and two oblique bearing rollers are the angle of 35 degrees conventionally and place about, restraint the operation of belt, and the weight and the tension of belt are also applyed simultaneously on the bearing roller, because the angle of oblique bearing roller, and the pressure that belt tension was applyed on oblique bearing roller can be divided into the lateral thrust of horizontal component and the pressure of vertical direction. When the belt runs, the central line of the belt is kept coincident with the central line of the roller frame, and the tension of the belt is in a stable state.
However, when the belt deviates in the running process, namely the central line of the belt deviates from the central line of the roller frame, the inclined carrier roller is obliquely arranged, the belt deviates to change the equal height position of the arc line of the belt, so that the tension of the belt is changed, the pressure intensity of the belt to the inclined carrier roller is changed, and the vertical component force generated by the inclined carrier roller is increased. The belt deviation can change the belt tension, so the vertical pressure of the inclined carrier roller is changed, the load force of the belt on the belt is correctly transmitted to the belt scale by the belt carrier roller support, the belt scale weighing system cannot judge and distinguish the incremental vertical component force generated by the unbalance loading tension, and the incremental vertical component force can only be counted into the weighing and metering operation according to the normal load force, so the metering accuracy of the belt scale inevitably generates larger accuracy deviation. Because the vertical component of the belt tension diagonal carrier roller is superposed on the gravity of the belt generated by the material on the belt, the measuring precision of the belt scale can be influenced by the variable vertical component of the belt deviation. The larger the belt deviation degree is, the larger the belt tension is changed, the larger the precision influence on the belt scale is, and the larger the precision deviation can be caused on some occasions with serious belt deviation phenomena. The belt deviation is a frequently occurring condition in the operation of the belt conveyor, so that the belt deviation becomes the most main factor influencing the long-term and stable high-precision metering of the belt weigher.
In view of this, the double-vector electronic belt scale provided by the invention realizes correction of the weighing error of the belt scale by accurately measuring the offset load force caused by belt deviation, eliminates the influence of the operation condition of the belt conveyor on the metering precision of the belt scale, and improves the metering precision of the belt scale.
The first embodiment is as follows:
a dual vector force electronic belt scale according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a dual-vector electronic belt scale according to an embodiment of the present invention.
Referring to fig. 1, a dual-vector electronic belt scale according to an embodiment of the present invention includes at least one weighing cell 100.
The weighing unit includes: the belt conveyor comprises a bias load force measuring assembly 110, a belt roller housing 120, at least one first base 130, and at least one weight sensor 140 disposed under the first base.
Wherein, the unbalance loading force measurement component 110 includes: a torque sensor 111 and a second base 112, wherein the second base 112 is used for bearing the belt roller frame 120.
Specifically, the torque sensor 111 is fixed on the first base 130, and the second base 112 is connected to the torque sensor 111. The central axis of the second base 112 and the central axis of the torque sensor 111 are located on the same vertical plane, that is, the weight of the second base 112 relative to the torque sensor 111 is equal, that is, when no load acts on the second base 112, the second base 112 is in a horizontal stable state, and no torque is transmitted to the torque sensor 111.
Similarly, the belt roller holder 120 is also uniformly installed on the second base 112, and "uniform" means that no torque is transmitted to the torque sensor 111 when the center line of the belt is matched with the center line of the belt roller holder 120 and the belt roller holder 120 is installed on the second base 112.
When the dual-vector electronic belt scale operates, if a belt on the belt roller frame 120 deviates, namely the central line of the belt is not matched with the central line of the belt roller frame 120, the tension of the belt changes, the pressure intensity of the belt to the inclined carrier roller changes accordingly, the vertical component force of the belt to the inclined carrier roller is increased, the second base 112 tends to incline, at the moment, the torsion sensor 111 is subjected to torsion to generate electric signal change, the weighing error of the belt is corrected by combining the electric signal generated by the weight measuring sensor 140 and the electric signal generated by the speed measuring sensor on the belt, the influence of the operating condition of the belt on the metering accuracy of the dual-vector electronic belt scale is eliminated, and the metering accuracy of the belt scale is improved.
Therefore, the method and the correction algorithm for the online force measurement analysis and the weighing and metering precision correction of the dual-vector electronic belt scale are generated.
The following describes the on-line force measurement analysis and the weighing precision correction method and correction of the dual-vector electronic belt scale
And (4) an algorithm.
As is well known, the weighing system of the conventional electronic belt scale is to bear the pressure of a load on a belt through a belt roller carrier 120 fixed on a weighing bridge frame on a belt conveyor bracket, so that a weight measuring sensor generates a real-time voltage signal E in direct proportion to the loadiThe load electric signal E is converted by the weight measuring integratoriConversion into belt load value Fi。
When a speed measuring sensor on the belt conveyor measures that the instantaneous speed of the belt is ViAt this time, the weight sensor detects the instantaneous load on the belt as FiThen the instantaneous flow of the belt at the ith time is Si＝FiVi.。
Assuming that the integrator samples n times within the Δ t time period, the flow rate S within the Δ t time period can be calculated by the following formula:
the accumulated weight of the materials in the time period delta t is
The embodiment of the invention is additionally provided with the torque sensor 111 for measuring the unbalance load generated by the belt deviationForce, when the belt deviates, the belt loses balance. The pressure of the belt on the deviation side to the inclined carrier roller on the side is increased, the tension of the belt is increased, the vertical component force generated by the inclined carrier roller enables the carrier roller frame to generate a rotating moment taking the torque sensor 111 as a central fulcrum, and the torque sensor 111 generates a voltage signal N proportional to the torque forcei。
Meanwhile, the vertical component force generated by the increased pressure of the inclined carrier roller on the deviation side is also transmitted to the first base 130, and the weight measuring sensor 140 positioned below the first base 130 outputs an incremental load signal Ez corresponding to the component forcei。
Therefore, a distribution curve of the change of the torsion signal corresponding to the change of the deviation degree of the belt and a distribution curve of the change of the incremental load signal corresponding to the change of the deviation degree of the belt can be obtained. Through derivation calculation, a load increment signal Ez under the influence of the belt deviation degree can be obtainediAnd the output signal N of the torque sensor 111iThe functional relationship of (a) is:
Ezi＝a Ni+b
wherein:
a is a compensation coefficient of a system structure;
b is the function relation compensation intercept of the torque sensor and the weight measuring sensor.
It should be noted that due to the existence of the coefficients a and b, the load increment signal Ez can be obtained no matter how different the belt specification and the sensor matching mode areiAnd the output signal N of the torque sensoriIf the belt specifications and the sensor matching modes are different, the result of the functional formula model is different, and the functional relationship belongs to the protection scope of the invention.
When the dual-vector electronic belt scale enters a normal metering state, if the belt keeps running at the middle position of the roller frame, the output signal of the torsion sensor 111 is zero, at this time, the load conversion of the dual-vector electronic belt scale still depends on a conventional conversion mode, and the electric signal E of the weight measuring sensor 140 isiDirectly converted into belt load value Fi。
Such as pericarpThe belt is deflected, at the moment, the torque sensor 111 outputs a real-time deflection signal NiIf so, the load increment signal caused by the belt deviation needs to be corrected according to a formula Ezi＝a Ni+ b, the signal increment Ez of the load sensor can be obtainediThe weight sensor 140 corrects the signal EfiComprises the following steps:
Efi＝Ei-Ezi
at this time, the instantaneous load F on the beltiAccording to EfiIs corrected to FfiThen the instantaneous flow of the belt at the ith moment is Sfi＝FfiVi.。
Assuming that the integrator samples n times within the Δ t time period, the flow rate S within the Δ t time period can be calculated by the following formula:
the accumulated weight of the materials in the time period delta t is
According to the double-vector electronic belt scale provided by the embodiment of the invention, by additionally arranging the offset load measuring component 110, when the double-vector electronic belt scale is in a dynamic metering state, the belt deviates, a corresponding additionally superposed vertical component value can be obtained through a real-time output value of the torque sensor 111, the metering precision is corrected in time, and the influence of batch-to-deviation on the metering precision is eliminated.
With continued reference to fig. 1, in some embodiments of the invention, the dual vector force electronic belt scale further comprises: the first bearing seat 131 and the second bearing seat 132 are oppositely disposed on the first base 130, and herein, "oppositely disposed" means that the first bearing seat 131 and the second bearing seat 132 are oppositely disposed, and the first bearing seat 131 and the second bearing seat 132 are concentric bearing seats.
In order to ensure that the torque sensor only receives the offset torque of the second base, the second base 112 is connected between the first bearing seat 131 and the second bearing seat 132, and the torque sensor 111 is fixed on the side of the first bearing seat 131 far away from the second base 112.
Fig. 2 is a schematic structural diagram of another dual-vector electronic belt scale according to an embodiment of the present invention, and referring to fig. 2, in some embodiments of the present invention, in order to increase the number of belt roller holders 120 mounted on the second base 112 and enhance the adaptability of the dual-vector electronic belt scale, two first bases 130 may be used, at this time, the first bearing seat 131 and the second bearing seat 132 are respectively disposed on the two first bases 130, the second base 112 is connected between the first bearing seat 131 and the second bearing seat 132, and the method and the correction algorithm for online dynamometry analysis and weighing measurement accuracy correction of the dual-vector electronic belt scale are the same as those of only one first base 130, and are not repeated herein.
In the above embodiment, in order to further enhance the structural stability of the dual-vector electronic belt scale, the offset force measuring assembly 110 may further include: a first connecting plate 1121 and a second connecting plate 1122 are oppositely provided on the second base 112.
The first connecting plate 1121 is connected to the first bearing housing 131 by a bearing connecting rod in the first bearing housing 131, and the second connecting plate 1122 is connected to the second bearing housing 132 by a bearing connecting rod in the second bearing housing 132. The torsion sensor 111 is connected to the first connection plate 1121 through a bearing connection rod in the first bearing housing 131.
In some embodiments of the present invention, the offset force measurement assembly 110 may further include: and a third base 150 fixed to the first base 130.
Specifically, one end of the torque sensor 111 is fixedly connected to the third base 150, and the other end of the torque sensor 11 is connected to the first connection plate 1121 through a bearing connection rod in the first bearing seat 131.
It can be understood that the torsion sensor 111 needs to be fixed to accurately measure the torsion force transmitted from the second base 112, and the measurement accuracy of the dual-vector electronic belt scale can be ensured due to the fixing effect of the third base 150 on the torsion sensor 111.
Optionally, the number of the weight sensors 140 disposed under each first base 130 is two, and the two weight sensors 140 are disposed at two ends of the first base 130, so as to form the most classically applicable dual-vector electronic belt scale, which can be better adapted to various working conditions.
According to the double-vector electronic belt scale provided by the embodiment of the invention, the offset load measuring assembly is additionally arranged on the first base, the offset load caused by belt deviation is accurately measured, and the weighing error of the double-vector electronic belt scale can be corrected by combining the online force measurement analysis and the weighing and metering accuracy correction method and correction algorithm of the double-vector electronic belt scale, so that the influence of the running working condition of the belt conveyor on the metering accuracy of the double-vector electronic belt scale is eliminated, and the metering accuracy of the double-vector electronic belt scale is improved.
Example two:
another dual vector force electronic belt scale according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 3 is a schematic structural diagram of a dual-vector electronic belt scale according to an embodiment of the present invention.
Referring to fig. 3, an embodiment of the present invention provides a dual-vector electronic belt scale, including: at least one weighing cell 100.
The weighing unit 100 includes: the belt roller holder comprises a bias load force measuring assembly 110, a belt roller holder 120, a first base 130 and at least one weight measuring sensor 140 arranged below the first base 130, wherein the first base 130 is used for bearing the belt roller holder 120.
Wherein, the belt roller frame 120 includes: a second base 112, and two oblique supporting rollers 121 and two supporting frames 122 disposed on the second base 112.
The offset force measuring assembly 110 includes: two pressure sensors 160, two pressure sensors 160 are respectively arranged at the top ends of the two support frames 122.
Two ends of one of the oblique supporting rollers 121 are respectively and rotatably connected with one of the pressure sensors 160 and the second base 112, and two ends of the other oblique supporting roller 121 are respectively and rotatably connected with the other pressure sensor 160 and the second base 112.
In some embodiments of the present invention, the offset force measurement assembly 110 may further include: the offset load force signal processing module 113, the offset load force signal processing module 113 is electrically connected with the two pressure sensors 160, and is used for processing the output signals of the pressure sensors 160.
Therefore, another method and a correction algorithm for online force measurement analysis and weighing and metering precision correction of the dual-vector electronic belt scale are generated.
The following describes the on-line force measurement analysis and the weighing precision correction method and correction of the dual-vector electronic belt scale
And (4) an algorithm.
It can be understood that, when the dual-vector electronic belt scale with the above structure is used, the pressure of the belt on the side of belt deviation on the oblique supporting roller 121 on the side is increased, the belt tension is increased, the output pressure signal generated by the pressure sensor 160 of the oblique supporting roller 121 on the side is increased, meanwhile, the output pressure signal generated by the pressure sensor 160 of the oblique supporting roller 121 on the other side is decreased, the pressure signals of the pressure sensors 160 on both sides are connected to the deviation load signal processing module 113, the deviation load signal processing module 113 automatically processes the voltage difference of the two pressure sensors 160, and outputs a deviation load differential voltage signal N proportional to the belt deviation load degreei。
Meanwhile, the vertical increment component force generated by the increased pressure of the inclined carrier roller 121 caused by belt deviation is also transmitted to the first base 130 of the belt scale, and the weight measuring sensor 140 outputs an increment load signal Ez corresponding to the unbalance load signali。
Therefore, a distribution curve of difference signal change corresponding to belt deviation degree change and an incremental load signal change distribution curve corresponding to belt deviation degree change can be obtained. Through derivation calculation, a load increment signal Ez under the influence of the belt deviation degree can be obtainediAnd the output signal N of the offset load force signal processing module 113iThe functional relationship of (a) is:
Ezi＝a Ni+b
wherein:
a is a compensation coefficient of a system structure;
b is the function relation compensation intercept of the torque sensor and the weight measuring sensor.
It should be noted that due to the existence of the coefficients a and b, the load increment signal Ez can be obtained no matter how different the belt specification and the sensor matching mode areiAnd the output signal N of the torque sensoriIf the belt specifications and the sensor matching modes are different, the result of the functional formula model is different, and the functional relationship belongs to the protection scope of the invention.
When the belt weigher enters a normal metering state, if the belt runs at the middle position of the belt roller carrier 120, the output signal of the offset load force signal processing module 113 is zero, at the moment, the load conversion of the belt weigher still depends on a conventional conversion mode, and the electric signal N of the weight measuring sensor 140 is a zero valueiDirectly converted into belt load value Fi。
If the belt deviates, the deviation load signal processing module 113 outputs a real-time deviation signal NiThe load increment signal caused by the deviation needs to be corrected according to the formula Ezi＝aNi+ b, the signal increment Ez of the load sensor can be obtainediThen, the load cell corrects the signal EfiComprises the following steps:
Efi＝Ei-Ezi
at this time, the instantaneous load F on the beltiAccording to EfiIs corrected to FfiThen the instantaneous flow of the belt at the ith moment is Sfi＝FfiVi.。
Assuming that the integrator samples n times within the Δ t time period, the flow rate S within the Δ t time period can be calculated by the following formula:
the accumulated weight of the materials in the time period delta t is
According to the double-vector electronic belt scale provided by the embodiment of the invention, the offset load measuring assembly 110 is additionally arranged on the two supporting frames 122 of the belt roller carrier 120, when the double-vector electronic belt scale enters a measuring state, the belt deviates, and a corresponding additionally superposed vertical component value can be obtained through a real-time value output by the offset load signal processing module 113, and the measuring precision is corrected in time, so that the influence of the belt deviation on the measuring precision is eliminated.
In the above embodiment, optionally, the belt roller housing 120 may further include: a flat idler 123, and a first support seat 124 and a second support seat 125 disposed on the second base 112.
The flat carrier roller 123 is horizontally and rotatably connected between the first support seat 124 and the second support seat 125, two ends of one of the oblique carrier rollers 121 are rotatably connected with one of the pressure sensors 160 and the first support seat 124, and two ends of the other oblique carrier roller 121 are rotatably connected with the other of the pressure sensors 160 and the second support seat 125.
Alternatively, two weight sensors 140 are provided, and the two weight sensors 140 are oppositely disposed at both ends of the first base 130.
According to the double-vector electronic belt scale provided by the embodiment of the invention, the offset load measuring assembly is additionally arranged on the belt roller carrier to accurately measure the offset load caused by belt deviation, and the weighing error of the double-vector electronic belt scale can be corrected by combining the online force measurement analysis and the weighing and metering accuracy correction method and correction algorithm of the double-vector electronic belt scale, so that the influence of the running working condition of the belt conveyor on the metering accuracy of the double-vector electronic belt scale is eliminated, and the metering accuracy of the double-vector electronic belt scale is improved.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, are used to indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of particular construction and operation, and thus, are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A dual vector force electronic belt scale, comprising: at least one weighing cell;
the weighing unit includes: the device comprises a bias load force measuring assembly, a belt roller carrier, at least one first base and at least one weight measuring sensor arranged below the first base;
the offset load force measuring assembly includes: the second base is used for bearing the belt roller carrier;
the torsion sensor is fixed on the first base, the second base is connected with the torsion sensor, and the central axis of the second base and the central axis of the torsion sensor are located on the same vertical plane.
2. The dual vector force electronic belt scale of claim 1, further comprising: the first bearing seat and the second bearing seat are oppositely arranged on the first base;
the second base is connected between the first bearing seat and the second bearing seat, and the torsion sensor is fixed on one side of the first bearing seat far away from the second base.
3. The dual-vector electronic belt scale of claim 2, wherein the number of the first bases is two, and the first bearing housing and the second bearing housing are respectively disposed on the two first bases.
4. The dual vector force electronic belt scale of claim 2 or 3, wherein the offset force measurement assembly further comprises: the first connecting plate and the second connecting plate are oppositely arranged on the second base;
the first connecting plate is connected with the first bearing seat through a bearing connecting rod, and the second connecting plate is connected with the second bearing seat through a bearing connecting rod;
the torsion sensor is connected with the first connecting plate through a bearing connecting rod.
5. The dual vector force electronic belt scale of claim 4, wherein the offset force measurement assembly further comprises: a third base fixed to the first base;
one end of the torque sensor is fixedly connected with the third base, and the other end of the torque sensor is connected with the first connecting plate through a bearing connecting rod.
6. The dual vector force electronic belt scale of any one of claims 1-3, wherein the number of weight sensors disposed under each of the first bases is two, and the two weight sensors are disposed at opposite ends of the first base.
7. A dual vector force electronic belt scale, comprising: at least one weighing cell;
the weighing unit includes: the device comprises a bias load force measuring assembly, a belt roller carrier, a first base and at least one weight measuring sensor arranged below the first base, wherein the belt roller carrier is arranged on the first base;
the belt roller frame includes: the device comprises a second base, two inclined carrier rollers and two supporting frames, wherein the two inclined carrier rollers and the two supporting frames are arranged on the second base;
the offset load force measuring assembly includes: the two pressure sensors are respectively arranged at the top ends of the two support frames;
two ends of one of the oblique supporting rollers are respectively and rotatably connected with one of the pressure sensors and the second base, and two ends of the other oblique supporting roller are respectively and rotatably connected with the other pressure sensor and the second base.
8. The dual vector force electronic belt scale of claim 7, wherein the offset force measurement assembly further comprises: and the unbalance loading force signal processing module is electrically connected with the two pressure sensors.
9. The dual vector force electronic belt scale of claim 7 or 8, wherein the belt roller housing further comprises: the flat carrier roller, a first supporting seat and a second supporting seat are arranged on the second base;
the flat carrier roller is horizontally and rotatably connected between the first supporting seat and the second supporting seat, two ends of one inclined carrier roller are respectively and rotatably connected with one of the pressure sensors and the first supporting seat, and two ends of the other inclined carrier roller are respectively and rotatably connected with the other of the pressure sensors and the second supporting seat.
10. The dual vector force electronic belt scale of claim 7 or 8, wherein the two weight sensors are disposed at opposite ends of the first base.
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| CN202010832740.7A CN114076629B (en) | 2020-08-18 | 2020-08-18 | Double vector force electronic belt scale |
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| CN202010832740.7A CN114076629B (en) | 2020-08-18 | 2020-08-18 | Double vector force electronic belt scale |
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| CN114076629A true CN114076629A (en) | 2022-02-22 |
| CN114076629B CN114076629B (en) | 2024-10-01 |
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