CN113295256A - Method for eliminating shaking of hook scale - Google Patents
Method for eliminating shaking of hook scale Download PDFInfo
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- CN113295256A CN113295256A CN202110684628.8A CN202110684628A CN113295256A CN 113295256 A CN113295256 A CN 113295256A CN 202110684628 A CN202110684628 A CN 202110684628A CN 113295256 A CN113295256 A CN 113295256A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
Abstract
The invention discloses a method for eliminating shake of a hook scale, which comprises the following steps: responding to an object to be measured hung on the hook scale, collecting a first function relation graph of tension along with time change and synchronously collecting a second function relation graph of height along with time change detected by the three-axis gyroscope and the three-axis accelerometer; obtaining the jitter period of the object to be tested according to the first functional relation diagram or the second functional relation diagram; obtaining the swing length of the object to be measured according to the shaking period; selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph; according to the first functional relation graph, the tension difference of the first time point and the second time point in the first functional relation graph is obtained; according to the second function relation graph, height difference of the first time point and the second time point in the second function relation graph is obtained; and obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference. And correcting the indication number of the hook scale according to the weight of the object to be measured. The measurement result influenced by the jitter of the object to be measured can be eliminated.
Description
Technical Field
The invention relates to the field of hanging scales, in particular to a method for eliminating shaking of a hanging scale.
Background
Hook scales, also known as hanging scales, hook scales, etc., are weighing machines that measure the mass (weight) of an object in a suspended state. The hook scale can hoist an object through hoisting equipment such as an electric hoist so as to measure the weight. Compared with the common scale, the hook scale has great advantages in weighing heavy objects.
In the use of hook balance, can lead to the shake because of the improper operation or external environment influence, not only can the inaccurate condition of measurement appear in hook balance when the article that awaits measuring takes place to shake, measured registration can follow the shake moreover and produce the change, unable normal reading. In the prior art, the weight of an object to be measured can be obtained by measuring the pulling force of the object to be measured which is shaken to the highest point and the pulling force of the lowest point and then calculating according to the pulling force of the highest point and the pulling force of the lowest point, so that the influence of shaking is eliminated. However, when the highest point tension is collected in the prior art, whether the object to be measured just reaches the highest point cannot be well determined, so the collected highest point tension is not necessarily the actual highest point tension, and finally, the obtained weight of the object to be measured deviates from the actual weight.
Disclosure of Invention
In view of some of the above-mentioned defects in the prior art, the present invention provides a method for eliminating shaking of a hook scale, which aims to eliminate the influence of shaking of an object to be measured on measurement of the hook scale and ensure accurate measurement result.
Accordingly, the present invention provides a method for eliminating shake of a hook scale, the method comprising:
responding to an object to be measured hung on the hook scale, collecting a first function relation graph of tension along with time change and synchronously collecting a second function relation graph of height along with time change detected by the three-axis gyroscope and the three-axis accelerometer; wherein the three-axis gyroscope and the three-axis accelerometer are arranged on a lifting hook of the hook scale;
obtaining the jitter cycle of the object to be tested according to the first functional relation diagram or the second functional relation diagram;
obtaining the swing length of the object to be detected according to the jitter period;
selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph; the first time point and the second time point are any two different points between adjacent peaks and troughs in the first functional relation graph or the second functional relation graph;
according to the first functional relation graph, obtaining the tension difference of the first time point and the second time point in the first functional relation graph; according to the second function relation graph, the height difference of the first time point and the second time point in the second function relation graph is obtained;
obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference, wherein the weight of the object to be measured, the pendulum length, the tension difference and the height difference meet the requirements
Wherein G is the weight of the object to be measured, L is the pendulum length, delta F is the tension difference, and delta h is the height difference;
and correcting the indication number of the hook scale according to the weight of the object to be measured.
Optionally, the acquiring a first functional relationship diagram of the tension along with the time change and synchronously acquiring a second functional relationship diagram of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time change includes:
and continuously acquiring a first function relation graph of the change of the tension along with the time at a preset time interval and synchronously acquiring a second function relation graph of the change of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time.
Optionally, the obtaining the jitter cycle of the object to be measured according to the first functional relationship diagram or the second functional relationship diagram includes:
determining the elapsed time of three adjacent peaks or troughs in the first functional relationship graph or the second functional relationship graph as the jitter cycle.
Optionally, the obtaining the swing length of the object to be measured according to the jitter cycle includes:
according to
Obtaining the pendulum length of the object to be detected; wherein L is the pendulum length, T is the shaking period, and g is the gravitational acceleration.
Optionally, the correcting the indication number of the hook scale according to the weight of the object to be measured includes:
and replacing the acquired weight of the object to be measured with the reading of the hook scale so as to enable the reading to be the weight of the object to be measured.
Optionally, the jitter angle of the object to be measured is less than or equal to 10 °; the shaking angle is an included angle between the lifting hook of the lifting hook scale and the direction vertical to the ground.
Optionally, the method further includes:
and uploading the first functional relation diagram, the second functional relation diagram and the weight of the object to be detected to a cloud server.
The invention has the beneficial effects that: 1. the method comprises the steps of collecting a first function relation graph of tension along with time change and synchronously collecting a second function relation graph of height along with time change detected by a three-axis gyroscope and a three-axis accelerometer; obtaining the jitter period of the object to be tested according to the first functional relation diagram or the second functional relation diagram; obtaining the swing length of the object to be measured according to the shaking period; selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph; according to the first functional relation graph, the tension difference of the first time point and the second time point in the first functional relation graph is obtained; according to the second function relation graph, height difference of the first time point and the second time point in the second function relation graph is obtained; and obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference. Compared with the prior art, the method does not need to collect the pulling force of the highest point and the lowest point, so that the problem that the pulling force of the highest point is not accurately collected in the prior art is avoided, and the problem that the weight of the object to be measured is also not accurately calculated due to the inaccurate pulling force of the highest point is further avoided; the invention can collect two time points which are different at will between the adjacent wave crests and wave troughs in the first function relation graph or the second function relation graph, and then obtain the height difference and the tension difference of the two time points, thereby obtaining the weight of the object to be measured. Compared with the prior art, the method has the advantage that the result of the weight of the object to be measured is more accurate. 2. The invention can obtain the swing length of the object to be measured according to the jitter period. The pendulum length can be measured simply and quickly without actual measurement. 3. The invention uploads the first function relation graph, the second function relation graph and the weight of the object to be measured to the cloud server. The data can be analyzed through the cloud server, the relation between the weight and shaking is found out, and the shaking eliminating treatment of the hook scale is facilitated. In conclusion, the invention collects a first function relation graph of the tension along with the time change and synchronously collects a second function relation graph of the height along with the time change detected by the three-axis gyroscope and the three-axis accelerometer; obtaining the swing length of the object to be measured through the first functional relation graph or the second functional relation graph; obtaining the tension difference of any two time points in the first function relation diagram and the height difference of any two time points in the second function relation diagram, and obtaining the weight of the object to be measured through the pendulum length, the tension difference and the height difference; the invention can effectively eliminate the influence of the shaking of the object to be measured on the measurement of the hook scale and ensure the accuracy of the measurement result.
Drawings
Fig. 1 is a schematic flow chart of a method for eliminating shake of a hook scale according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the position of an analyte at a first time point and a second time point according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a first functional relationship according to an embodiment of the present invention;
fig. 4 is a diagram of a second functional relationship according to an embodiment of the present invention.
Detailed Description
The invention discloses a method for eliminating shaking of a hook scale, and a person skilled in the art can use the contents of the text for reference and appropriately improve the technical details for realization. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.
The applicant researches and discovers that: when the hook scale is used, the object to be measured shakes due to improper operation or external factors. When the object to be measured shakes, a centripetal force is generated on the object to be measured, so that the condition that the tension of the lifting hook is equal to the weight (gravity) of the object to be measured when the object to be measured is static can not be achieved, and the measuring structure of the lifting hook scale is inaccurate. Because it cannot be guaranteed that the measured highest point tension is the actual highest point tension, the method for calculating the weight of the object to be measured through the highest point tension and the lowest point tension in the prior art is not accurate enough.
Therefore, an embodiment of the present invention provides a method for eliminating shake of a hook scale, as shown in fig. 1, the method includes:
step S101: and responding to the object to be measured hung on the hook scale, and acquiring a first function relation graph of the change of the pulling force along with the time and synchronously acquiring a second function relation graph of the change of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time.
Wherein, three-axis gyroscope and three-axis accelerometer set up on the lifting hook of lifting hook balance.
It should be noted that, the time points on the first functional relationship diagram and the second functional diagram are acquired synchronously, that is, the time points correspond to each other. For example, the first time point of the first functional relationship diagram and the first time point of the second functional relationship diagram are the same time point in reality, and the tension and the height acquired at the first time point are corresponding to each other.
Optionally, the acquiring a first functional relationship diagram of the tension along with the time change and synchronously acquiring a second functional relationship diagram of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time change includes:
and continuously acquiring a first function relation graph of the change of the tension along with the time at a preset time interval and synchronously acquiring a second function relation graph of the change of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time.
The data collected at intervals such as (time point, tension), (time point, height) are fitted into a functional relation graph, so that the interval collection is easy to realize and convenient and simple. The first functional relationship diagram and the second functional relationship diagram may be as shown in fig. 3 and 4.
And S102, acquiring the jitter cycle of the object to be measured according to the first functional relation diagram or the second functional relation diagram.
It should be noted that, although the jitter tends to be gradually stable, the period of the jitter does not change. The jitter cycle of the object to be measured can be obtained from the first functional relation graph or the second functional relation graph.
Optionally, obtaining the jitter cycle of the object to be measured according to the first functional relationship diagram or the second functional relationship diagram includes:
and determining the elapsed time of three adjacent peaks or troughs in the first functional relation graph or the second functional relation graph as the jitter period.
In the first functional relationship diagram, the tensile force changes in one cycle as follows: small → large → small or large → small → large; in the second functional relationship diagram, the degree of change in one cycle is: low → high → low or high → low → high → low. Therefore, the elapsed time of adjacent three peaks or valleys in the first functional relationship diagram or the second functional relationship diagram is determined as the jitter cycle.
Step S103: and obtaining the swing length of the object to be measured according to the shaking period.
Optionally, obtaining the swing length of the object to be measured according to the jitter cycle includes:
according to
Obtaining the pendulum length of the object to be measured; wherein L is the pendulum length, T is the shaking period, and g is the gravitational acceleration.
It should be noted that the jitter can be regarded as a simple pendulum, so the pendulum length has a certain relationship with the period, and the pendulum length can be solved by the period.
Step S104: and selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph.
The first time point and the second time point are any two different points between adjacent peaks and troughs in the first functional relation graph or the second functional relation graph.
It should be noted that the first time point and the second time point are two points within a quarter of the jitter cycle, and the total energy thereof can be guaranteed to be the closest. Thereby reducing measurement errors.
Step S105: according to the first functional relation graph, the tension difference of the first time point and the second time point in the first functional relation graph is obtained; and obtaining the height difference of the first time point and the second time point in the second functional relation graph according to the second functional relation graph.
Optionally, the first time point and the second time point are substituted into the first functional relationship diagram to obtain a first pulling force and a second pulling force, and the pulling force difference is obtained according to the first pulling force and the second pulling force.
Optionally, the first time point and the second time point are substituted into the second functional relationship graph to obtain a first height and a second height, and a height difference is obtained according to the first height and the second height.
Step S106: and obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference. The weight, the pendulum length, the tension difference and the height difference of the object to be measured meet
Wherein G is the weight of the object to be measured, L is the swing length, delta F is the tension difference, and delta h is the height difference.
Alternatively, in one embodiment, as shown in fig. 2, 201 in fig. 2 represents the object to be tested,
the method comprises the following steps:
obtaining the energy conservation of the object to be measured at the first time point and the second time point
According to the centripetal force formula of the object to be detected, the centripetal force of the object to be detected at a first time point is obtained
And the second time of the opposing force
As shown in fig. 2, Δ h ═ h2-h1＝L(cosθ2-cosθ1)；
According to
Δh＝h2-h1＝L(cosθ2-cosθ1) And G ═ mg, obtained
Wherein G is the weight of the object to be measured, L is the pendulum length, delta F is the tension difference, delta h is the height difference, v1Is the speed, v, of the test object at a first point in time2The speed of the object to be measured at the second time point, h1The distance between the object to be measured at the first time point and the fixed point of the hook scale can be obtained through a second function relation graph h2The distance between the object to be measured at the second time point and the fixed point of the hook scale can be obtained through a second function relation graph, m is the mass of the object to be measured, g is the gravity acceleration, and theta1Is the angle between the hook and the direction perpendicular to the ground at the first time point, theta2The included angle between the lifting hook and the direction vertical to the ground at the second time point.
It should be noted that, in fig. 2, the gravity center of the object is drawn at the connection position with the hook scale, so that the pendulum length is consistent with the length of the hook scale. Fig. 2 is only drawn for convenience of description, and the pendulum length is rarely consistent with the length of the hook in practice, and fig. 2 is only used for illustration and does not limit the invention in any way.
Step S107: and correcting the indication number of the hook scale according to the weight of the object to be measured.
Optionally, the indication of the hook scale is corrected according to the weight of the object to be measured, including:
and replacing the reading of the hook scale by the obtained weight of the object to be measured so as to make the reading be the weight of the object to be measured.
Optionally, the jitter angle of the object to be measured is less than or equal to 10 °; wherein, the shake angle is the angle between the lifting hook of the hook scale and the direction vertical to the ground.
It should be noted that if the jitter amplitude is too large, the measurement accuracy of the embodiment of the present invention is reduced.
Optionally, the method further comprises:
and uploading the first function relation graph, the second function relation graph and the weight of the object to be detected to a cloud server.
It should be noted that, in the embodiment of the present invention, the first functional relationship diagram, the second functional relationship diagram, and the weight of the object to be measured are uploaded to the cloud server. The data can be analyzed through the cloud server, the relation between the weight and shaking is found out, and the shaking eliminating treatment of the hook scale is facilitated.
The embodiment of the invention collects a first function relation graph of the tension along with the time change and synchronously collects a second function relation graph of the height along with the time change detected by a three-axis gyroscope and a three-axis accelerometer; obtaining the jitter period of the object to be tested according to the first functional relation diagram or the second functional relation diagram; obtaining the swing length of the object to be measured according to the shaking period; selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph; according to the first functional relation graph, the tension difference of the first time point and the second time point in the first functional relation graph is obtained; according to the second function relation graph, height difference of the first time point and the second time point in the second function relation graph is obtained; and obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference. Compared with the prior art, the embodiment of the invention does not need to collect the pulling forces of the highest point and the lowest point, thereby avoiding the problem that the pulling force of the highest point is not accurately collected in the prior art and further avoiding the problem that the weight of the object to be measured is also not accurately calculated due to the inaccurate pulling force of the highest point; according to the embodiment of the invention, two time points which are different at will between adjacent wave crests and wave troughs in the first function relation graph or the second function relation graph can be collected, and then the height difference and the tension difference of the two time points are obtained, so that the weight of the object to be measured is obtained. Compared with the prior art, the embodiment of the invention has the advantage that the result of the weight of the object to be measured is more accurate. According to the embodiment of the invention, the swing length of the object to be measured can be obtained according to the jitter period. The pendulum length can be measured simply and quickly without actual measurement. The embodiment of the invention uploads the first function relation graph, the second function relation graph and the weight of the object to be measured to the cloud server. The data can be analyzed through the cloud server, the relation between the weight and shaking is found out, and the shaking eliminating treatment of the hook scale is facilitated. In summary, the embodiment of the invention collects a first functional relation graph of the tension along with the time change and synchronously collects a second functional relation graph of the height detected by a three-axis gyroscope and a three-axis accelerometer along with the time change; obtaining the swing length of the object to be measured through the first functional relation graph or the second functional relation graph; obtaining the tension difference of any two time points in the first function relation diagram and the height difference of any two time points in the second function relation diagram, and obtaining the weight of the object to be measured through the pendulum length, the tension difference and the height difference; the embodiment of the invention can effectively eliminate the influence of the shaking of the object to be measured on the measurement of the hook scale and ensure the accuracy of the measurement result.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the 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 shall fall within the protection scope of the present invention.
Claims (7)
1. A method for eliminating shake of a hook scale, which is characterized by comprising the following steps:
responding to an object to be measured hung on the hook scale, collecting a first function relation graph of tension along with time change and synchronously collecting a second function relation graph of height along with time change detected by the three-axis gyroscope and the three-axis accelerometer; wherein the three-axis gyroscope and the three-axis accelerometer are arranged on a lifting hook of the hook scale;
obtaining the jitter cycle of the object to be tested according to the first functional relation diagram or the second functional relation diagram;
obtaining the swing length of the object to be detected according to the jitter period;
selecting a first time point and a second time point in the first functional relation graph or the second functional relation graph; wherein the first time point and the second time point are any two different points between adjacent peaks and troughs in the first functional relationship diagram or the second functional relationship diagram;
according to the first functional relation graph, obtaining the tension difference of the first time point and the second time point in the first functional relation graph; according to the second function relation graph, the height difference of the first time point and the second time point in the second function relation graph is obtained;
obtaining the weight of the object to be measured according to the pendulum length, the tension difference and the height difference, wherein the weight of the object to be measured, the pendulum length, the tension difference and the height difference meet the requirements
Wherein G is the weight of the object to be measured, L is the pendulum length, and Delta F isThe tension difference, Δ h is the height difference;
and correcting the indication number of the hook scale according to the weight of the object to be measured.
2. The method of claim 1, wherein said acquiring a first plot of pull force as a function of time and simultaneously acquiring a second plot of height as a function of time as sensed by a three-axis gyroscope and a three-axis accelerometer comprises:
and continuously acquiring a first function relation graph of the change of the tension along with the time at a preset time interval and synchronously acquiring a second function relation graph of the change of the height detected by the three-axis gyroscope and the three-axis accelerometer along with the time.
3. The method according to claim 1, wherein the obtaining the jitter cycle of the object according to the first functional relationship diagram or the second functional relationship diagram comprises:
determining the elapsed time of three adjacent peaks or troughs in the first functional relationship graph or the second functional relationship graph as the jitter cycle.
4. The method according to claim 1, wherein the obtaining the swing length of the object to be tested according to the jitter cycle comprises:
according to
Obtaining the pendulum length of the object to be detected; wherein L is the pendulum length, T is the shaking period, and g is the gravitational acceleration.
5. The method of claim 1, wherein the correcting the indication of the hook scale based on the weight of the test object comprises:
and replacing the acquired weight of the object to be measured with the reading of the hook scale so as to enable the reading to be the weight of the object to be measured.
6. The method according to claim 1, characterized in that the jitter angle of the test object is less than or equal to 10 °; the shaking angle is an included angle between the lifting hook of the lifting hook scale and the direction vertical to the ground.
7. The method of claim 1, further comprising:
and uploading the first functional relation diagram, the second functional relation diagram and the weight of the object to be detected to a cloud server.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114593802A (en) * | 2022-03-29 | 2022-06-07 | 锐马（福建）电气制造有限公司 | Method and system for controlling vibration elimination of hook scale |
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