CN118067228A - Belt scale weighing method based on double weighing data self-matching speed-up - Google Patents
Belt scale weighing method based on double weighing data self-matching speed-up Download PDFInfo
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/14—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices
- G01G11/16—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices being electrical or electronic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
The invention discloses a belt scale weighing method based on double weighing data self-matching speed-up, which comprises the following steps: the method comprises the steps of responding to a conveyor belt to start conveying materials at a preset conveying speed, respectively controlling front weighing sensors and rear weighing sensors which are arranged on front and rear weighing carrier rollers to acquire weighing data in real time, and respectively obtaining a front weighing data set and a rear weighing data set; acquiring a first preceding weighing characteristic generated by a preceding weighing sensor of the material on the conveyor belt in a first time stamp path according to the preceding weighing data set code in real time; at the rear weighing sensor end, matching a second rear weighing characteristic and a second timestamp thereof from rear weighing data in real time; solving the real-time rate of the conveyor belt according to the second timestamp and the first timestamp; the material weight is obtained from the real-time rate and post-weighing dataset. The belt scale for transporting materials at constant speed improves the weighing precision of the belt scale.
Description
Technical Field
The invention relates to the field of belt scales, in particular to a belt scale weighing method based on double weighing data self-matching speed-up.
Background
The belt scale is an automatic weighing machine for continuously weighing bulk materials on a conveyer belt without subdividing the mass or interrupting the movement of the conveyer belt, a weighing carrier roller of the belt scale is a key component for guiding a belt, and a weighing sensor arranged below the carrier roller is used for instantaneously measuring the materials passing through the carrier roller and is the most key part of the belt scale. The belt scale can be used for weighing coal, sand mud and the like.
The existing belt scale utilizes a motor to drive a belt on a carrier roller, materials are poured into the upper surface of the belt, when a conveying belt for carrying the materials passes through the carrier roller, the carrier roller plays a role in supporting and guiding the conveying belt, meanwhile, a weighing sensor installed inside a fixing plate carries out instantaneous weighing on the materials passing through the carrier roller within the weighing length range, the weighing sensor transmits pressure signals of each section to an instrument, the speed sensor measures the rotating speed of the carrier roller, and the weighing instrument calculates and processes the pressure signals and the speed signals to obtain the weight of the materials.
In a belt scale for transporting materials at a constant speed, the speed is constant, so that a speed sensor is not needed, and the weight of the transported materials can be obtained only by adopting a weighing sensor. However, due to the fact that the belt scale is aged or materials remain, the scale body vibrates or the conveyor belt jumps, deviation of the original constant speed can be caused, and the final weighing result is not accurate enough.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention aims to provide a belt scale weighing method based on dual weighing data self-matching speed-up, which aims to improve the weighing precision of a belt scale for transporting materials at a constant speed.
In order to achieve the above purpose, the invention discloses a belt scale weighing method based on double weighing data self-matching speed-seeking, which comprises the following steps:
Step S1, responding to a conveyor belt to start conveying materials at a preset conveying speed, respectively controlling front weighing sensors and rear weighing sensors which are arranged on front and rear weighing carrier rollers to acquire weighing data in real time, and respectively obtaining a front weighing data set and a rear weighing data set; the preceding weighing dataset and the following weighing dataset comprise time stamps and corresponding weighing data;
s2, encoding according to the previous weighing data set in real time, and obtaining a first previous weighing characteristic generated by the previous weighing sensor of the material on the conveyor belt in a first time stamp way;
Step S3, at the rear weighing sensor end, matching a second rear weighing characteristic matched with the first front weighing characteristic and a second timestamp thereof from the rear weighing data in real time;
Step S4, two adjacent pairs of the second time stamp and the first time stamp are taken, wherein the two first time stamps are respectively And/>The corresponding two second time stamps are respectively/>And/>; Wherein the second timestamp/>And/>The time interval between the two is smaller than a preset interval;
Step S5, according to Solving for the conveyor belt at the/>Real-time rate/>; Wherein said/>At the/>, for the conveyor beltTo said/>Average speed of a time period, while considering the conveyor belt at the/>And when said/>For the acquisition of the starting time point, the/>For a preset belt scale initial standard speed, the/>At the/>, for the conveyor beltTo said/>Average speed of a time period, while considering the conveyor belt at the/>Is a real-time rate of (2); said/>At the/>, for the conveyor beltTo said/>Average speed over time period, said/>At the/>, for the conveyor beltTo said/>Average speed over time period, said/>For the conveyor belt at the positionTo said/>Average speed over a period of time; at/>When not the acquisition starting time point, the previously solved/>, is utilizedCorresponding/>Acting as the following formula/>Corresponding/>Initial/>An initial standard speed of the belt scale is known;
and S6, performing integral calculation according to the post-weighing data set and the real-time rate corresponding to each time stamp in the post-weighing data set to obtain an instantaneous flow value and an accumulated weight value of the material on the belt scale. Optionally, the step S3 includes:
step 301, determining a matching section from the rear weighing data at the rear weighing sensor end in real time according to the distance between the front weighing sensor and the rear weighing sensor and the preset speed;
Step S302: and matching a second post-weighing feature matched with the first pre-weighing feature and a second timestamp thereof from the matching interval in real time.
Optionally, the first preceding weighing feature includes a first preceding feature change sequence, the second following weighing feature includes a second following feature change sequence, and the step S2 and the step S3 specifically include:
Acquiring the first previous characteristic change sequence generated by the previous weighing sensor in a first time stamp way of the material on the conveyor belt according to the previous weighing data set code in real time; the first previous characteristic change sequence is a change trend of weighing data in each preset time period, and the change trend comprises rising, falling and leveling;
at the rear weighing sensor end, the second rear characteristic change sequence matched with the first front characteristic change sequence and the second timestamp thereof are matched from the rear weighing data in real time; the second subsequent characteristic change sequence is the change trend of weighing data in each preset time period.
Optionally, the step S1 includes:
And responding to the conveyor belt to start conveying materials at a preset conveying speed, respectively controlling the front weighing sensor and the rear weighing sensor which are arranged on the front weighing idler and the rear weighing idler to acquire the symmetrical weight data of the front weighing sensor and the rear weighing sensor in real time at a first period duration, recording each weighing data and a corresponding time stamp, and respectively obtaining a front weighing data set and a rear weighing data set.
Optionally, after the step S6, the method further includes:
Judging whether the difference between the real-time rate and the preset speed is larger than the preset speed difference or not according to the real-time rate and the preset speed, and if so, giving out fault early warning; if not, normal work is carried out.
Optionally, after the step S6, the method further includes:
And controlling the belt scale to stop conveying the material in response to the accumulated weight value reaching a required weight value.
The invention has the beneficial effects that: 1. the belt scale corresponding to the invention is provided with a plurality of weighing idler rollers, a material starts to be conveyed by a conveying belt at a preset conveying speed, front weighing sensors and rear weighing sensors arranged at the front and rear weighing idler rollers are respectively controlled to acquire weighing data in real time, and a front weighing data set and a rear weighing data set are respectively obtained; acquiring a first preceding weighing characteristic generated by a preceding weighing sensor of the material on the conveyor belt in a first time stamp path according to the preceding weighing data set code in real time; at the rear weighing sensor end, matching a second rear weighing characteristic matched with the first front weighing characteristic and a second timestamp thereof from rear weighing data in real time; solving the real-time rate of the conveyor belt according to the second timestamp and the first timestamp; and (3) carrying out integral calculation according to the real-time speed and the post-weighing data set to obtain an instantaneous flow value and an accumulated weight value of the material on the belt scale. According to the invention, when the same part of the material passes through the front weighing sensor and the rear weighing sensor, the generated weighing data changes are matched, so that the time stamp difference value of the same part of the material passing through the front weighing sensor and the rear weighing sensor is obtained, and the real-time speed of the conveyor belt under each time stamp can be accurately obtained. According to the belt conveyor scale, the real-time speed can be accurately obtained without a speed sensor, the problem that the original constant speed is deviated and cannot be accurately weighed due to vibration of the belt conveyor scale body or jump of a conveying belt is avoided, and the weighing precision is improved.
2. According to the belt balance weighing device, through weighing characteristic matching, even in a belt balance with a non-constant speed, real-time speed can be obtained without a speed sensor, and further the weight of materials can be obtained.
3. The invention determines a matching interval from the rear weighing data in real time according to the distance between the front weighing sensor and the rear weighing sensor and the preset speed at the rear weighing sensor end; and matching the second post-weighing characteristic matched with the first pre-weighing characteristic and the second timestamp thereof from the matching interval in real time. The invention can further reduce the matching range of the second post-weighing feature, thereby improving the matching efficiency.
4. The method comprises the steps of obtaining a first previous characteristic change sequence generated by a previous weighing sensor of a material on a conveyor belt in a first time stamp way according to a previous weighing data set code in real time; the first previous characteristic change sequence is a change trend of weighing data in each preset time period, and the change trend comprises rising, falling and leveling; at the rear weighing sensor end, a second rear characteristic change sequence matched with the first front characteristic change sequence and a second timestamp thereof are matched from rear weighing data in real time; the second subsequent characteristic change sequence is the change trend of the weighing data in each preset time period. According to the invention, the time difference of the same part of the material passing through the two weighing sensors can be judged according to the weighing change trend, the real-time speed of the point position of the material at the rear weighing sensor under each time stamp can be accurately obtained, and the weighing precision is improved.
In conclusion, the belt scale for transporting materials at a constant speed improves the weighing precision.
Drawings
Fig. 1 is a schematic flow chart of a belt scale weighing method based on double weighing data self-matching speed-up according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a belt scale with multiple weighing idler rollers according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a feature matching relationship according to an embodiment of the present invention;
FIG. 4 is a graph of a real-time rate solution relationship provided by an embodiment of the present invention.
Detailed Description
The invention discloses a belt scale weighing method based on double weighing data self-matching speed-up, and a person skilled in the art can refer to the content of the text and properly improve the technical details. It is expressly noted that all such similar substitutions and modifications will be apparent to those skilled in the art, and are deemed to be included in the present invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those skilled in the relevant art that variations and modifications can be made in the methods and applications described herein, and in the practice and application of the techniques of this invention, without departing from the spirit or scope of the invention.
The research of the applicant shows that: in a belt scale for transporting materials at a constant speed, the speed is constant, so that a speed sensor is not needed, and the weight of the transported materials can be obtained only by adopting a weighing sensor. However, due to the fact that the belt scale is aged or materials remain, the scale body vibrates or the conveyor belt jumps, deviation of the original constant speed can be caused, and the final weighing result is not accurate enough.
Therefore, the invention provides a belt scale weighing method based on double weighing data self-matching speed-up, as shown in fig. 1, the method comprises the following steps:
and S1, responding to the conveyor belt to start conveying materials at a preset conveying speed, respectively controlling the front weighing sensor and the rear weighing sensor which are arranged on the front weighing idler and the rear weighing idler to acquire weighing data in real time, and respectively obtaining a front weighing data set and a rear weighing data set.
Wherein the preceding and following weighing data sets comprise time stamps and corresponding weighing data.
It should be noted that, the belt scale of the embodiment of the invention corresponds to a pair of weighing idler rollers, and the weighing idler rollers support and weigh the conveyor belt. According to the embodiment of the invention, the weighing sensors corresponding to the two weighing idler rollers can be arbitrarily selected to acquire data. The front weighing sensor is a weighing sensor for acquiring front symmetrical weight data along the moving direction of the conveyor belt, and the rear weighing sensor is a weighing sensor for acquiring rear symmetrical weight data along the moving direction of the conveyor belt.
In a specific embodiment, the multi-weighing idler belt scale according to the embodiment of the invention is shown in fig. 2, 21 is a conveyor belt, 22 is a weighing idler, and 23 is a weighing sensor.
In one embodiment, step S1 includes:
And responding to the conveyor belt to start conveying materials at a preset conveying speed, respectively controlling the front weighing sensor and the rear weighing sensor which are arranged on the front weighing idler and the rear weighing idler to acquire the symmetrical weight data of the front weighing sensor and the rear weighing sensor in real time at a first period duration, recording each weighing data and a corresponding time stamp, and respectively obtaining a front weighing data set and a rear weighing data set.
It should be noted that, the periodic collection is convenient and efficient, and the complex program is not needed to control the collection interval. In the embodiment of the invention, the first period time interval is adjusted according to the application condition, but cannot be excessively large so as to ensure the weighing precision. Periodic acquisitions of equal duration may be varied in other embodiments, which are presented as an example only and not limiting of the invention.
And S2, encoding according to the previous weighing data set in real time, and obtaining a first previous weighing characteristic generated by a material on the conveyor belt at a previous weighing sensor in a first time stamp way.
It should be noted that, the feature extraction is performed on the weighing data according to the weighing data set code, so that the weighing data shows a certain feature easy to observe.
And step S3, at the rear weighing sensor end, matching a second rear weighing characteristic matched with the first front weighing characteristic and a second timestamp thereof from the rear weighing data in real time.
It should be noted that, a second post-weighing feature matched with the first pre-weighing feature is matched from the post-weighing data, and the point position where the material part corresponding to the first pre-weighing feature passes through the post-weighing sensor is described.
In one embodiment, the step S3 includes:
Step S301, determining a matching section from the rear weighing data in real time according to the distance between the front weighing sensor and the rear weighing sensor and the preset speed at the rear weighing sensor end;
Step S302: and matching the second post-weighing characteristic matched with the first pre-weighing characteristic and the second timestamp thereof from the matching interval in real time.
It should be noted that, the approximate time that the material part corresponding to the first preceding weighing feature reaches the point position of the following weighing sensor can be obtained according to the distance between the preceding weighing sensor and the following weighing sensor and the preset speed in real time, so as to obtain a matching interval, reduce the matching range and improve the matching efficiency. On the other hand, the problem of incorrect matching caused by too high similarity of some features outside the matching interval is avoided. For example, if the same part of the material reaches the front weighing sensor for 10s, the material reaches the rear weighing sensor for 20s according to the preset speed, at this time, the matching interval can be reduced to 19s-21s, and the matching is started without 10s, so that the matching efficiency is greatly improved.
In a specific embodiment, the first preceding weighing feature comprises a first preceding feature variation sequence and the second following weighing feature comprises a second following feature variation sequence, steps S2 and S3, comprising in particular:
acquiring a first previous characteristic change sequence generated by a previous weighing sensor of the material on the conveyor belt in a first time stamp way according to the previous weighing data set code in real time; the first previous characteristic change sequence is a change trend of weighing data in each preset time period, and the change trend comprises rising, falling and leveling;
At the rear weighing sensor end, a second rear characteristic change sequence matched with the first front characteristic change sequence and a second timestamp thereof are matched from rear weighing data in real time; the second subsequent characteristic change sequence is the change trend of the weighing data in each preset time period.
For example, the trend of the change is expressed as 1, the trend of the change is expressed as-1, the average of the change is expressed as 0, the first preceding characteristic change sequence is 10-1110-10, the second following characteristic change sequence is 10-1110-00, and the first preceding characteristic change sequence and the second following characteristic change sequence are not necessarily identical in terms of reality, and can be considered to be matched as long as the matching rule is met.
In another embodiment, the first preceding weighing feature and the second following weighing feature may be represented from an image, as shown in FIG. 3, where the first preceding weighing feature and the second following weighing feature may be considered to match when a portion of the continuous similarity of the curves in the image exceeds a threshold. In fig. 3, the dashed box is a matching part, and the two parts are considered to be matched because the two parts are basically identical in structure and trend although the two parts are slightly different in size.
S4, two adjacent pairs of second time stamps and first time stamps are taken, wherein the two first time stamps are respectivelyAnd/>Corresponding to two second time stamps are/>, respectivelyAnd/>; Wherein the second timestamp/>And/>The time interval between which is smaller than the preset interval.
The preset interval is used for ensuring thatAnd/>Is small enough to enable the belt balance to be at/>To/>The corresponding average rate can be regarded as/>Is used for the real-time rate of (a). Meanwhile, since the belt scale is transported at a constant speed, the speed change is not too large even if the belt scale is affectedAnd/>The belt balance is small enough to enable the belt balance to/>To/>The average speed of a time period can be considered to be at/>Is used for the real-time rate of (a).
Step S5, according toSolving for conveyor belt position/>Real-time rate/>; Wherein/>For the conveyor belt/>To/>Average speed of time period, while considered conveyor belt at/>And whenFor the acquisition of the starting time point,/>For the preset initial standard speed of the belt balance,/>For the conveyor belt/>To/>Average speed of time period, while considered conveyor belt at/>Is a real-time rate of (2); /(I)For the conveyor belt/>To/>Average speed over time period,/>For the conveyor belt/>To/>Average speed over time period,/>For the conveyor belt/>To/>Average speed over a period of time; at/>When not the acquisition starting time point, the previously solved/>, is utilizedCorresponding/>Acting as the following formula/>Corresponding/>Initial/>Is the known initial standard speed of the belt conveyor scale.
The initial formula is as followsThe second equation can be used for the/>, of the initial equation, for the known belt scale initial standard speedServe as/>The third formula may be the/>, of the second formulaServe as/>And so on, the real-time rate at each timestamp can be obtained.
And S6, performing integral calculation according to the post-weighing data set and the real-time rate corresponding to each time stamp in the post-weighing data set to obtain an instantaneous flow value and an accumulated weight value of the material on the belt scale. It should be noted that, according to the real-time speed and the post-weighing data set, the integral calculation is performed to obtain the instantaneous flow value and the accumulated weight value of the material on the belt scale to be consistent with those of the common belt scale.
As shown in FIG. 4, two adjacent pairs of second time stamps and first time stamps are taken, the two first time stamps are respectivelyAndCorresponding to two second time stamps are/>, respectivelyAnd/>; Wherein/>And/>The time interval between the two is smaller than the preset interval, and the point position of the material at the rear weighing sensor is at/>And/>The average rate in between is taken as the real-time rate of the material in;
According to Solving for conveyor belt position/>Real-time rate/>; Wherein/>For the conveyor belt/>To/>Average speed of time period, while considered conveyor belt at/>And when/>For the acquisition of the starting time point,/>For the preset initial standard speed of the belt balance,/>For the conveyor belt/>To/>Average speed of time period, while considered conveyor belt at/>Is a real-time rate of (2); /(I)For the conveyor belt/>To/>Average speed over time period,/>For the conveyor belt/>To/>Average speed over time period,/>For the conveyor belt/>To/>Average speed over a period of time; at/>When not the acquisition starting time point, the previously solved/>, is utilizedCorresponding/>Acting as the following formula/>Corresponding/>Initial/>Is the known initial standard speed of the belt conveyor scale.
In the above formulaAnd/>All representing that the distance between the preceding load cell and the following load cell is known. Thus, when/>In order to collect the starting point in time,Only/>And/>Is unknown, and the two unknowns can be solved by exactly two equations. It is difficult to have/>, because of uneven belt scale speed. At/>When not the acquisition starting time point, the previously solved/>, can be utilizedCorresponding/>Acting as the following formula/>Corresponding/>. With this iteration, the real-time rate at each timestamp can be solved.
According to the embodiment, through the calculation, the accuracy of the real-time speed can be further improved, and therefore the accuracy of a weighing result is guaranteed. This embodiment is only one method of real-time rate solving, and there are many more methods that can achieve real-time rate solving in real-time applications, so this embodiment is not limiting of the invention.
In a specific embodiment, after step S6, the method further includes:
Judging whether the difference between the real-time speed and the preset speed is larger than the preset speed difference or not according to the real-time speed and the preset speed, and if so, sending out fault early warning; if not, normal work is carried out.
It should be noted that, when the difference between the real-time rate obtained by solving and the preset speed is too large, it is indicated that the belt scale itself may have serious faults and needs to be overhauled. Otherwise, the weighing efficiency and the weighing precision may be greatly affected.
In a specific embodiment, after step S6, the method further includes:
and controlling the belt scale to stop conveying the materials in response to the accumulated weight value reaching the required weight value.
It should be noted that, the materials are generally shipped in batches, such as in carts and boxes, so that the weight reaches the requirement and the batches need to be replaced for shipment again, so that the overweight can be avoided.
The belt scale corresponding to the embodiment of the invention is provided with a plurality of weighing idler rollers, a material starts to be conveyed by a conveying belt at a preset conveying speed, a front weighing sensor and a rear weighing sensor which are arranged at the front and rear weighing idler rollers are respectively controlled to acquire weighing data in real time, and a front weighing data set and a rear weighing data set are respectively obtained; acquiring a first preceding weighing characteristic generated by a preceding weighing sensor of the material on the conveyor belt in a first time stamp path according to the preceding weighing data set code in real time; at the rear weighing sensor end, matching a second rear weighing characteristic matched with the first front weighing characteristic and a second timestamp thereof from rear weighing data in real time; solving the real-time rate of the conveyor belt according to the second timestamp and the first timestamp; and (3) carrying out integral calculation according to the real-time speed and the post-weighing data set to obtain an instantaneous flow value and an accumulated weight value of the material on the belt scale. According to the invention, when the same part of the material passes through the front weighing sensor and the rear weighing sensor, the generated weighing data changes are matched, so that the time stamp difference value of the same part of the material passing through the front weighing sensor and the rear weighing sensor is obtained, and the real-time speed of the conveyor belt under each time stamp can be accurately obtained. According to the belt conveyor scale, the real-time speed can be accurately obtained without a speed sensor, the problem that the original constant speed is deviated and cannot be accurately weighed due to vibration of the belt conveyor scale body or jump of a conveying belt is avoided, and the weighing precision is improved.
According to the embodiment of the invention, through the weighing characteristic matching, even in a belt scale with a constant speed, the real-time speed can be obtained without a speed sensor, so that the weight of the material can be obtained.
At the end of the rear weighing sensor, the embodiment of the invention determines a matching interval from rear weighing data in real time according to the distance between the front weighing sensor and the rear weighing sensor and the preset speed; and matching the second post-weighing characteristic matched with the first pre-weighing characteristic and the second timestamp thereof from the matching interval in real time. The embodiment of the invention can further reduce the matching range of the second post-weighing feature, thereby improving the matching efficiency.
According to the embodiment of the invention, a first previous characteristic change sequence generated by a previous weighing sensor of a material on a conveyor belt in a first time stamp way is obtained in real time according to the previous weighing data set code; the first previous characteristic change sequence is a change trend of weighing data in each preset time period, and the change trend comprises rising, falling and leveling; at the rear weighing sensor end, a second rear characteristic change sequence matched with the first front characteristic change sequence and a second timestamp thereof are matched from rear weighing data in real time; the second subsequent characteristic change sequence is the change trend of the weighing data in each preset time period. According to the embodiment of the invention, the time difference of the same part of the material passing through the two weighing sensors can be judged according to the weighing change trend, the real-time speed of the point position of the material at the rear weighing sensor under each time stamp can be accurately obtained, and the weighing precision is improved.
In summary, the embodiment of the invention improves the weighing precision of the belt scale for transporting materials at a constant speed.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (6)
1. The belt scale weighing method based on double weighing data self-matching speed-up is characterized by comprising the following steps:
Step S1, responding to a conveyor belt to start conveying materials at a preset conveying speed, respectively controlling front weighing sensors and rear weighing sensors which are arranged on front and rear weighing carrier rollers to acquire weighing data in real time, and respectively obtaining a front weighing data set and a rear weighing data set; wherein the preceding and following weigh data sets include time stamps and corresponding weigh data;
s2, encoding according to the previous weighing data set in real time, and obtaining a first previous weighing characteristic generated by the previous weighing sensor of the material on the conveyor belt in a first time stamp way;
Step S3, at the rear weighing sensor end, matching a second rear weighing characteristic matched with the first front weighing characteristic and a second timestamp thereof from the rear weighing data in real time;
Step S4, two adjacent pairs of the second time stamp and the first time stamp are taken, wherein the two first time stamps are respectively And/>The corresponding two second time stamps are respectively/>And/>; Wherein the second timestamp/>And/>The time interval between the two is smaller than a preset interval;
Step S5, according to Solving for the conveyor belt at the/>Real-time rate/>; Wherein said/>At the/>, for the conveyor beltTo said/>Average speed of a time period, while considering the conveyor belt at the/>And when said/>For the acquisition of the starting time point, the/>For a preset belt scale initial standard speed, the/>At the/>, for the conveyor beltTo said/>Average speed of a time period, while considering the conveyor belt at the/>Is a real-time rate of (2); said/>At the/>, for the conveyor beltTo said/>Average speed over a period of time, theAt the/>, for the conveyor beltTo said/>Average speed over time period, said/>At the/>, for the conveyor beltTo said/>Average speed over a period of time; at/>When not the acquisition starting time point, the previously solved/>, is utilizedCorresponding/>Acting as the following formula/>Corresponding/>Initial/>An initial standard speed of the belt scale is known;
and S6, performing integral calculation according to the post-weighing data set and the real-time rate corresponding to each time stamp in the post-weighing data set to obtain an instantaneous flow value and an accumulated weight value of the material on the belt scale.
2. The belt scale weighing method based on the self-matching speed-up of double weighing data according to claim 1, wherein the step S3 comprises:
step 301, determining a matching section from the rear weighing data at the rear weighing sensor end in real time according to the distance between the front weighing sensor and the rear weighing sensor and the preset speed;
Step S302: and matching a second post-weighing feature matched with the first pre-weighing feature and a second timestamp thereof from the matching interval in real time.
3. The belt scale weighing method based on double weighing data self-matching speed-seeking according to claim 1, wherein said first preceding weighing feature comprises a first preceding feature variation sequence, said second following weighing feature comprises a second following feature variation sequence, said steps S2 and S3 specifically comprise:
Acquiring the first previous characteristic change sequence generated by the previous weighing sensor in a first time stamp way of the material on the conveyor belt according to the previous weighing data set code in real time; the first previous characteristic change sequence is a change trend of weighing data in each preset time period, and the change trend comprises rising, falling and leveling;
at the rear weighing sensor end, the second rear characteristic change sequence matched with the first front characteristic change sequence and the second timestamp thereof are matched from the rear weighing data in real time; the second subsequent characteristic change sequence is the change trend of weighing data in each preset time period.
4. The belt scale weighing method based on double weighing data self-matching speed-up as claimed in claim 1, wherein the step S1 comprises:
And responding to the conveyor belt to start conveying materials at a preset conveying speed, respectively controlling the front weighing sensor and the rear weighing sensor which are arranged on the front weighing idler and the rear weighing idler to acquire the symmetrical weight data of the front weighing sensor and the rear weighing sensor in real time at a first period duration, recording each weighing data and a corresponding time stamp, and respectively obtaining a front weighing data set and a rear weighing data set.
5. The belt scale weighing method based on dual weighing data self-matching speed-seeking as claimed in claim 1, wherein after said step S6, said method further comprises:
Judging whether the difference between the real-time rate and the preset speed is larger than the preset speed difference or not according to the real-time rate and the preset speed, and if so, giving out fault early warning; if not, normal work is carried out.
6. The belt scale weighing method based on dual weighing data self-matching speed-seeking as claimed in claim 1, wherein after said step S6, said method further comprises:
And controlling the belt scale to stop conveying the material in response to the accumulated weight value reaching a required weight value.
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