CN107091677B - Error compensation method and belt scale based on error compensation - Google Patents
Error compensation method and belt scale based on error compensation Download PDFInfo
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- CN107091677B CN107091677B CN201710234879.XA CN201710234879A CN107091677B CN 107091677 B CN107091677 B CN 107091677B CN 201710234879 A CN201710234879 A CN 201710234879A CN 107091677 B CN107091677 B CN 107091677B
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- G01—MEASURING; TESTING
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- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
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Abstract
The invention provides an error compensation method, which comprises the following steps: compensating the obtained first weighing signal and the second weighing signal to obtain a compensated weighing signal F3＝(F1×D2‑F2×D1)/(D2‑D1). The invention also provides a belt scale based on error compensation, comprising: the device comprises a first weighing unit, a second weighing unit, a speed sensor, a compensation unit and a weighing instrument; or the first weighing unit, the second weighing unit, the speed sensor and the compensation weighing unit; the compensation unit or the compensation weighing unit compensates the first weighing signal and the second weighing signal. Meanwhile, the compensation unit, the weighing instrument or the compensation weighing unit also judges whether the materials are the same batch of materials, and the weighing instrument or the compensation weighing unit carries out accumulation summation on instantaneous weighing of the same batch of materials to obtain and display the total weight of the conveyed materials. The invention has the characteristics of high precision, good repeatability and durability, low cost and the like, and can be widely applied to the fields of metering and the like.
Description
Technical Field
The invention relates to an automatic weighing technology, in particular to an error compensation method and a belt scale based on error compensation.
Background
In the process of continuously conveying materials by the belt conveyor, the conveying belt and the materials borne by the conveying belt need to be weighed by an electronic belt scale: subtracting the mass of the adhesive tape from the total mass of the conveying belt and the materials borne by the conveying belt to obtain the mass of the materials; the total mass of all the conveyed materials can be obtained through continuous weighing and accumulation. In practical application, because the conveying belt is continuous, the conveying belt in the weighing area where the electronic belt scale is located cannot be separated from the conveying belt in the non-weighing area, so that the total mass of the conveying belt and the materials borne by the conveying belt, which is detected by the weighing sensor of the electronic belt scale, can be influenced by the conveying belt and the materials in the adjacent non-weighing area, and a belt effect is generated. That is, the belt effect refers to the comprehensive nonlinear influence caused by the change of parameters such as the tension of the conveying belt, the elastic modulus of the conveying belt, the section inertia moment of the conveying belt, the non-collimation degree of the weighing carrier roller and the like on the weighing accuracy.
The formula of the gravity calculation of the electronic belt scale known in the industry is that F is nq L gcos theta +2 TKD/L, wherein F is called gravity, n is the number of weighing carrier roller sets, q is weighing load linear density, L is carrier roller distance, g is gravity acceleration, theta is a conveyor inclination angle, T is conveyor belt tension, K is conveyor belt effect coefficient, and D is the non-collimation degree of the weighing carrier rollers, in the formula, an item 2 TKD/L is an error item caused by belt effect, errors caused by the belt effect not only have non-linear characteristics, but also are uncertain in corresponding relation with material conveying amount.
To further address the problem of belt effect, researchers in the field have developed various methods and techniques for improving the weighing accuracy of electronic belt scales, generally classified into three categories: the first category is to minimize the absolute value of various factors causing belt effects, for example, to specify that an electronic belt scale must be installed at a position where the tension of a carrying section of a conveying belt is minimum, to reduce the non-collimation degree of a weighing idler, and the like; the second category is that the values of all factors causing the belt effect are kept unchanged as much as possible, and the influence is relieved by multi-point calibration in the weighing range, for example, an electronic belt scale is required to be arranged at the position with the minimum tension change of a bearing section of a conveying belt, the tension of the belt is controlled to be kept constant, and the like; the third category is to increase the ratio of the mass of the material in the weighing signal, so as to relatively reduce the influence of belt effects, such as increasing the number of weighing idlers, lengthening the length of the weighing zone, etc. In fact, these three measures are essentially the same, and all strive to reduce the absolute value of the error caused by the belt effect, and the belt effect cannot be completely eliminated fundamentally.
Therefore, in the prior art, the electronic belt scale has the problems of low weighing accuracy, repeatability and durability, high installation, adjustment and calibration cost and the like.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide an error compensation method and a belt scale based on error compensation, which have high accuracy, good repeatability and durability, and low cost.
In order to achieve the above object, the present invention provides an error compensation method comprising:
an error compensation method specifically comprises the following steps:
Step 3, acquiring the time delta t required by the material on the belt to move from the position of the first weighing unit to the position of the second weighing unit according to the conveying speed v of the belt and the distance s between the first weighing unit and the second weighing unit; judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation and obtaining a compensation weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a Wherein D is2≠D1。
In summary, after the error compensation method of the present invention compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L can be effectively eliminated, so that the weighing measured after compensation does not have the problems of low accuracy, repeatability and durability due to the influence of external fluctuation.
In order to achieve the above object, a first technical solution of the belt scale based on error compensation provided by the present invention is:
a belt scale based on error compensation comprises a first weighing unit, a second weighing unit, a speed sensor, a compensation unit and a weighing instrument; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s.
A first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1Is the non-collimation degree of the weighing carrier roller of the first weighing unit.
A second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensation unit, where D2Is the non-collimation degree of the weighing carrier roller of the second weighing unit.
A speed sensor for transmitting the detected belt conveying speed v to the compensation unit;
a compensation unit for recording the first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3Sending the data to a weighing instrument; wherein D is2≠D1。。
A weighing instrument for weighing according to the compensation weighing signal F sent by the compensation unit3And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
In summary, in the belt scale based on error compensation according to the first aspect of the present invention, after the compensation unit compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L may be effectively eliminated, so that the weighing measured after compensation does not have the problems of low accuracy, repeatability and durability due to the influence of external fluctuation.
In order to achieve the above object, a second technical solution of the belt scale based on error compensation provided by the present invention is:
a belt scale based on error compensation comprises a first weighing unit, a second weighing unit, a speed sensor, a compensation unit and a weighing instrument; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s.
A first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1Is the non-collimation degree of the weighing carrier roller of the first weighing unit.
A second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensation unit, where D2Is the non-collimation degree of the weighing carrier roller of the second weighing unit.
And the speed sensor is used for sending the detected belt conveying speed v to the weighing instrument.
A compensation unit for compensating the first weighing signal F according to the compensation command sent by the weighing instrument1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3Sending the data to a weighing instrument; wherein D is2≠D1。
A weighing instrument for recording a first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same at all times, and a compensation instruction is sent to the compensation unit; according to the compensation sheetCompensated weighing signal F transmitted by element3And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
In summary, in the belt scale based on error compensation according to the second aspect of the present invention, after the compensation unit compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F — nq L gcos θ +2 TKD/L may be effectively eliminated.
In order to achieve the above object, a third technical solution of the belt scale based on error compensation provided by the present invention is:
a belt scale based on error compensation comprises a first weighing unit, a second weighing unit, a speed sensor and a compensation weighing unit; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s.
A first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation weighing unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1Is the non-collimation degree of the weighing carrier roller of the first weighing unit.
A second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensating weighing cell, where D2Is the non-collimation degree of the weighing carrier roller of the second weighing unit.
And the speed sensor is used for sending the detected belt conveying speed v to the compensation weighing unit.
A compensation weighing unit for recording a first weighing signal F1And receiveTo the first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a According to the compensated weighing signal F3Acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total weight of the accumulated material; wherein D is2≠D1。
In summary, in the belt scale based on error compensation according to the third aspect of the present invention, after the compensation weighing unit compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F — nq L gcos θ +2 TKD/L may be effectively eliminated.
Drawings
Fig. 1 is a schematic flow chart of the error compensation method of the present invention.
Fig. 2 is a schematic diagram of a first component structure of the belt scale based on error compensation according to the present invention.
Fig. 3 is a schematic diagram of a second structure of the belt scale based on error compensation according to the present invention.
Fig. 4 is a schematic diagram of a third component structure of the belt scale based on error compensation according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic flow chart of the error compensation method of the present invention. As shown in fig. 1, the error compensation method of the present invention specifically includes:
Step 3, acquiring the time delta t required by the material on the belt to move from the position of the first weighing unit to the position of the second weighing unit according to the conveying speed v of the belt and the distance s between the first weighing unit and the second weighing unit; judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation and obtaining a compensation weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a Wherein D is2≠D1。
In summary, after the error compensation method of the present invention compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L can be effectively eliminated, so that the weighing measured after compensation does not have the problems of low accuracy, repeatability and durability due to the influence of external fluctuation.
Fig. 2 is a schematic diagram of a first structure of the belt scale based on error compensation according to the present invention. As shown in fig. 2, the belt scale based on error compensation according to the present invention includes: the device comprises a first weighing unit 1, a second weighing unit 5, a speed sensor 2, a compensation unit 4 and a weighing instrument 3; the first weighing unit 1 and the second weighing unit 5 are arranged along the conveying direction of the belt, and the distance between the first weighing unit 1 and the second weighing unit 5 is s;
a first weighing unit 1 for outputting a first weighing signal F1＝nqLgcosθ+2TKD1/L to the compensation unit 4, where n is the number of sets of weighing idlers, q is the linear density of the weighing load, L is the idler spacing, g is the gravitational acceleration, θ is the conveyor inclination, T is the belt tension, K is the belt stiffness coefficient, D is the belt stiffness coefficient1Is the non-collimation degree of the weighing carrier roller of the first weighing unit.
A second weighing unit 5 for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to the compensation unit 4, where D2Is the non-collimation degree of the weighing carrier roller of the second weighing unit.
A speed sensor 2 for sending the detected belt conveying speed v to the compensation unit 4.
A compensation unit 4 for recording the first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a According to the belt conveying speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, the position of the material is obtained and the material runs to the position of the first weighing unitThe time delta t needed by the position of the second weighing unit is used for judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3To the weighing instrument 3. Here, D2≠D1。
A weighing instrument 3 for compensating the weighing signal F sent by the compensation unit 43And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
In the invention, materials are continuously conveyed through the belt, and the weighing instrument 3 sums up instantaneous weights of the materials on the belt, and finally the total weight of the materials is obtained through accumulation.
In the invention, the compensation unit 4 and the weighing instrument 3 are both single-chip controllers or programmable controllers.
In summary, in the belt scale based on error compensation corresponding to the first structure of the present invention, after the compensation unit 4 compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L can be effectively eliminated, so that the weighing measured after compensation does not have the problems of low accuracy, repeatability and durability due to the influence of external fluctuation.
Fig. 3 is a schematic diagram of a second structure of the belt scale based on error compensation according to the present invention. As shown in fig. 3, the belt scale based on error compensation according to the present invention includes: the device comprises a first weighing unit 1, a second weighing unit 5, a speed sensor 2, a compensation unit 8 and a weighing instrument 7; the first weighing unit 1 and the second weighing unit 5 are arranged along the conveying direction of the belt, and the distance between the first weighing unit 1 and the second weighing unit 5 is s.
A first weighing unit 1 for outputting a first weighing signal F1＝nqLgcosθ+2TKD1/L to the compensation unit 8, where n is the number of sets of weighing idlers, q is the linear density of the weighing load, L is the idler spacing, g is the gravitational acceleration, θ is the conveyor inclination, T is the belt tension, K is the belt stiffness coefficient, D is the belt stiffness coefficient1Is the non-collimation degree of the weighing carrier roller of the first weighing unit.
A second weighing unit 5 for outputting a second weighing signal F2＝nqLgcosθ+2TKD2and/L is sent to the compensation unit 8, wherein D2 is the degree of non-collimation of the weighing carrier roller of the second weighing unit.
And the speed sensor 2 is used for sending the detected belt conveying speed v to the weighing instrument 3.
A compensation unit 8 for compensating the first weighing signal F according to the compensation command sent by the weighing instrument 71A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3Sending to a weighing instrument 7; wherein D is2≠D1。
A weighing instrument 7 for recording a first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Time passesMaterial and t of the first weighing unit2The materials passing through the second weighing unit are the same at all times, and a compensation instruction is sent to the compensation unit 8; according to the compensation weighing signal F sent by the compensation unit 83And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
In the invention, materials are continuously conveyed through the belt, and the weighing instrument 7 sums up the instantaneous weights of the materials on the belt, and finally the total weight of the materials is obtained through accumulation.
In the invention, the compensation unit 8 and the weighing instrument 7 are both single-chip controllers or programmable controllers.
In summary, in the belt scale based on error compensation corresponding to the second configuration of the present invention, after the compensation unit 7 compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L can be effectively eliminated, so that the weighing measured after compensation does not have the problems of low accuracy, repeatability and durability due to the influence of external fluctuation.
Fig. 4 is a schematic diagram of a third component structure of the belt scale based on error compensation according to the invention. As shown in fig. 4, the belt scale based on error compensation according to the present invention includes: the device comprises a first weighing unit 1, a second weighing unit 5, a speed sensor 2 and a compensation weighing unit 6; the first weighing unit 1 and the second weighing unit 5 are arranged along the conveying direction of the belt, and the distance between the first weighing unit 1 and the second weighing unit 5 is s.
A first weighing unit 1 for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation weighing unit 6, wherein n is the number of weighing roller sets, q is the weighing load linear density, L is the roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1Degree of non-collimation of weighing carrier roller of first weighing unit。
The second weighing unit 54 is used for outputting a second weighing signal F output by itself2＝nqLgcosθ+2TKD2/L to the compensating weighing cell 6, where D2Is the non-collimation degree of the weighing carrier roller of the second weighing unit.
And a speed sensor 2 for transmitting the detected belt conveying speed v to the compensation weighing unit 6.
A compensation weighing unit 6 for recording the first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same materials at all times; then, the first weighing signal F is measured1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a According to the compensated weighing signal F3Acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total weight of the accumulated material; wherein D is2≠D1。
In the invention, the compensation weighing unit 6 is a single chip microcomputer controller or a programmable controller.
In the invention, materials are continuously conveyed through the belt, and the compensation weighing unit 6 sums up instantaneous weights of the materials on the belt, and finally the total weight of the materials is obtained through accumulation.
In summary, in the belt scale based on error compensation corresponding to the third component structure of the present invention, after the compensation weighing unit compensates the first weighing signal and the second weighing signal, the error term "2 TKD/L" in the weighing calculation formula F ═ nq L gcos θ +2 TKD/L can be effectively eliminated.
Adopt above-mentioned error compensation method or based on the belt weigher of error compensation to carry out the weighing test to the same batch of sample material, the experiment under the different belt tension condition carries out the cubic respectively and tests, the experimental condition is as table 1:
table 1 sample material weighing test recording table
As can be seen from Table 1, although the belt tension has a large variation range, after the error compensation method is adopted to weigh the sample material, the weight of the sample material is very stable and is hardly influenced by the belt tension, and the error compensation method and the belt scale based on the error compensation can effectively eliminate the unstable nonlinear influence caused by the belt effect, thereby improving the weighing accuracy, durability and repeatability.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An error compensation method is characterized in that the method specifically comprises the following steps:
step 1, acquiring a first weighing signal F sent by a first weighing unit1＝nqLgcosθ+2TKD1/L and recording the first weighing time t1Wherein n is the number of the weighing carrier roller groups, q is the weighing load linear density, and L is the space between the carrier rollersDistance, g is gravity acceleration, theta is conveyor inclination angle, T is belt tension, K is belt stiffness coefficient, D1The non-collimation degree of a weighing carrier roller of the first weighing unit is obtained;
step 2, acquiring a second weighing signal F sent by a second weighing unit2＝nqLgcosθ+2TKD2/L and recording a second weighing time t2(ii) a Wherein D is2The non-collimation degree of a weighing carrier roller of the second weighing unit is obtained;
step 3, acquiring the time delta t required by the material on the belt to move from the position of the first weighing unit to the position of the second weighing unit according to the conveying speed v of the belt and the distance s between the first weighing unit and the second weighing unit; judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation and obtaining a compensation weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a Wherein D is2≠D1。
2. A belt scale based on error compensation comprises a first weighing unit, a second weighing unit and a speed sensor, and is characterized by further comprising a compensation unit and a weighing instrument; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s;
a first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1The non-collimation degree of a weighing carrier roller of the first weighing unit is obtained;
a second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensation unit, where D2The non-collimation degree of a weighing carrier roller of the second weighing unit is obtained;
a speed sensor for transmitting the detected belt conveying speed v to the compensation unit;
a compensation unit for recording the first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same, and then the first weighing signal F is processed1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3Sending the data to a weighing instrument; wherein D is2≠D1;
A weighing instrument for weighing according to the compensation weighing signal F sent by the compensation unit3And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
3. A belt scale based on error compensation comprises a first weighing unit, a second weighing unit and a speed sensor, and is characterized by further comprising a compensation unit and a weighing instrument; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s;
a first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1The non-collimation degree of a weighing carrier roller of the first weighing unit is obtained;
a second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensation unit, where D2The non-collimation degree of a weighing carrier roller of the second weighing unit is obtained;
the speed sensor is used for sending the detected belt conveying speed v to the weighing instrument;
a compensation unit for compensating the first weighing signal F according to the compensation command sent by the weighing instrument1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) Will compensate the weighing signal F3Sending the data to a weighing instrument; wherein D is2≠D1;
A weighing instrument for recording a first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the same at all times, and a compensation instruction is sent to the compensation unit; according to the compensation weighing signal F sent by the compensation unit3And acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total accumulated weight of the material.
4. A belt scale based on error compensation comprises a first weighing unit, a second weighing unit and a speed sensor, and is characterized by further comprising a compensation weighing unit; the first weighing unit and the second weighing unit are arranged along the conveying direction of the belt, and the distance between the first weighing unit and the second weighing unit is s;
a first weighing unit for outputting a first weighing signal F1＝nqLgcosθ+2TKD1and/L sending the data to a compensation weighing unit, wherein n is the number of weighing carrier roller groups, q is the weighing load linear density, L is the carrier roller distance, g is the gravity acceleration, theta is the inclination angle of the conveyor, T is the belt tension, K is the belt rigidity coefficient, D1The non-collimation degree of a weighing carrier roller of the first weighing unit is obtained;
a second weighing unit for outputting a second weighing signal F2＝nqLgcosθ+2TKD2/L to a compensating weighing cell, where D2The non-collimation degree of a weighing carrier roller of the second weighing unit is obtained;
the speed sensor is used for sending the detected belt conveying speed v to the compensation weighing unit;
a compensation weighing unit for recording a first weighing signal F1And receiving a first weighing signal F1First weighing time t1A second weighing signal F2And receiving a second weighing signal F2Second weighing time t2(ii) a Acquiring the time delta t required by the material to move from the position of the first weighing unit to the position of the second weighing unit according to the belt transmission speed v sent by the speed sensor and the distance s between the first weighing unit and the second weighing unit, and judging the first weighing time t1Second weighing time t2Time difference t between1-t2Whether it is equal to the material running time Δ t: if equal, t is indicated1Material passing through the first weighing unit at all times and t2The materials passing through the second weighing unit are the sameAfter the material is charged, the first weighing signal F is added1A second weighing signal F2Carrying out correction compensation to obtain a compensated weighing signal F3＝(F1×D2-F2×D1)/(D2-D1) (ii) a According to the compensated weighing signal F3Acquiring the instantaneous weight of the material, accumulating the instantaneous weight of the material and displaying the total weight of the accumulated material; wherein D is2≠D1。
5. The belt scale of claim 2 or 3, wherein the compensation unit is a single chip controller or a programmable controller.
6. The belt scale of claim 2 or 3, wherein the weighing instrument is a single chip controller or a programmable controller.
7. The belt scale of claim 4, wherein the compensating weighing unit is a single chip controller or a programmable controller.
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| CN112050916B (en) * | 2020-06-22 | 2021-11-30 | 华东理工大学 | Method for measuring total mass of material based on vibration frequency of weighing carrier roller |
| CN114061727B (en) * | 2021-11-11 | 2024-06-04 | 吉林烟草工业有限责任公司 | Belt scale weighing abnormity monitoring method |
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| US20130219985A1 (en) * | 2010-11-18 | 2013-08-29 | Saimo Electric Company Limited | High precision belt weighing device and method |
| JP5904715B2 (en) * | 2011-03-28 | 2016-04-20 | 大和製衡株式会社 | Conveyor scale |
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| CN202048964U (en) * | 2010-12-29 | 2011-11-23 | 南京三埃工控股份有限公司 | Tilt angle compensation arrangement of belt scale |
| CN102706435A (en) * | 2012-06-27 | 2012-10-03 | 铜陵华飞电子科技有限公司 | Temperature compensation metering device for belt weigher display controller |
| CN104154974A (en) * | 2014-07-23 | 2014-11-19 | 赛摩电气股份有限公司 | High-stability electronic belt scale and stability compensating method thereof |
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