A method and system for monitoring the load of a steel truss rotating turntable

Abstract

The present invention provides a method and system for monitoring the load of a steel truss swivel turntable, which relates to the field of load monitoring technology. The method includes: setting a first pressure sensor at the center of the bottom surface of the upper turntable of the swivel turntable; setting multiple second pressure sensors at the edge of the bottom surface of the upper turntable; obtaining first initial pressure data and second initial pressure data before starting to rotate; obtaining first pressure data, second pressure data and rotation angle at multiple moments during the rotation process; determining the load state parameters of the swivel turntable based on the first initial pressure data, second initial pressure data, first pressure data, second pressure data and rotation angle; determining the load safety state of the swivel turntable based on the load state parameters of the swivel turntable. According to the present invention, the load state of the swivel turntable can be determined at multiple moments during the rotation process, which facilitates timely discovery of safety hazards and risks during the rotation process and timely adjustments, which is conducive to the smooth completion of the rotation process.

Description

Technical Field

[0001] The present invention relates to the technical field of load monitoring, and in particular to a method and system for monitoring the load of a steel truss swivel turntable. Background Art

[0002] In the related art, CN116519185A discloses a load swing torque detection device for a large ball joint bearing and a method of use, wherein the detection device includes a measuring frame, a fixing assembly, a core shaft assembly, a load assembly and a rocker arm. The fixing assembly can be selectively detachably mounted on the measuring frame from the front and back sides, and the center of the sphere of the inner ring of the large ball joint bearing is located at the exact center of the fixing assembly. The connection point between the load assembly and the core shaft assembly is always located at the center of the sphere of the inner ring of the large ball joint bearing. The load assembly applies different loads to the core shaft assembly. The rocker arm connects the core shaft assembly and drives the core shaft to swing, thereby driving the inner ring of the large ball joint bearing to swing. The load swing torque detection device for a large ball joint bearing of this scheme will not cause changes in the load due to the swinging of the inner ring of the bearing when detecting the bearing, so the measurement value is highly accurate. After the bearing is installed, the reverse side detection can be performed without disassembling the bearing, which is convenient to use.

[0003] CN113280962A discloses an axial load detection device for a turntable bearing and a shield machine. The axial load detection device for a turntable bearing comprises: a sensor mounting base for fixing to one of the inner and outer rings of a bearing to be tested; the sensor mounting base having a ring body corresponding portion spaced axially from the end face of the other inner or outer ring of the bearing to be tested; and a displacement sensor mounted on the ring body corresponding portion and spaced about the rotational axis of the bearing to be tested to detect the axial displacement of the inner or outer ring spaced from the ring body corresponding portion. When the turntable bearing is subjected to an axial load, axial displacement occurs between the outer and inner rings. The axial displacement between the inner and outer rings of the turntable bearing has a one-to-one correspondence with the axial load applied to the turntable bearing. This axial displacement can be used to determine the axial load of the turntable bearing under this axial displacement, thereby enabling real-time detection of the axial load of the turntable bearing.

[0004] Therefore, in the related art, the load and torque of the turntable and the ball joint can be detected, but it is difficult to monitor the load distribution and safety status during the rotation of the turntable, and it is also difficult to determine whether there is a risk of tipping during the rotation process.

[0005] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0006] The present invention provides a method and system for monitoring the load of a steel truss swivel turntable, which can solve the technical problems that related technologies are difficult to monitor the load distribution and safety status during the rotation process using a swivel turntable, and are also difficult to determine whether there is a risk of tipping during the rotation process.

[0007] According to a first aspect of the present invention, a method for monitoring the load of a steel truss rotating turntable is provided, comprising: setting a plurality of first pressure sensors at the center of the bottom surface of an upper turntable of the rotating turntable; setting a plurality of second pressure sensors at the edge of the bottom surface of the upper turntable; obtaining first initial pressure data detected by the plurality of first pressure sensors and second initial pressure data detected by the plurality of second pressure sensors before the steel truss carried on the rotating turntable starts to rotate; obtaining first pressure data detected by the plurality of first pressure sensors and second pressure data detected by the plurality of second pressure sensors, as well as the rotation angle of the steel truss at multiple moments during the rotation of the steel truss carried on the rotating turntable; determining the load state parameters of the rotating turntable based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle; and determining the load safety state of the rotating turntable based on the load state parameters of the rotating turntable.

[0008] According to the present invention, the load state parameters of the rotating turntable are determined based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle, including: determining the load loading uniformity coefficient of the rotating turntable based on the first initial pressure data and the second initial pressure data; determining the load uniformity coefficient at the i-th moment based on the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss carried on the rotating turntable, and the load loading uniformity coefficient; determining the load distribution variation coefficient at the i-th moment based on the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data and the rotation angle; determining the load rotation safety factor at the i-th moment based on the rotation angles at the i-th moment and each moment before the i-th moment; determining the load state parameters of the rotating turntable at the i-th moment based on the load uniformity coefficient, the load distribution variation coefficient and the load rotation safety factor at the i-th moment.

[0009] According to the present invention, the load uniformity coefficient of the rotating turntable is determined based on the first initial pressure data and the second initial pressure data, including: according to the formula , determine the load uniformity coefficient of the rotating turntable ,in, is the maximum value of the first initial pressure data, is the minimum value of the first initial pressure data, is the average value of the first initial pressure data, is the maximum value of the second initial pressure data, is the minimum value of the second initial pressure data, is the average value of the second initial pressure data, max is the maximum value function, is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, is the number of the first pressure sensor, is the number of the second pressure sensors.

[0010] According to the present invention, the load uniformity coefficient at the i-th moment is determined based on the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss supported on the rotating turntable, and the load uniformity coefficient, including: according to the formula , determine the load uniformity coefficient at the i-th moment ,in, is the maximum value of the first pressure data at the i-th moment, is the minimum value of the first pressure data at the i-th moment, is the average value of the first pressure data at the i-th moment, is the maximum value of the second pressure data at the i-th moment, is the minimum value of the second pressure data at the i-th moment, is the average value of the second pressure data at the i-th moment, max is the maximum value function, is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, is the number of the first pressure sensor, is the number of the second pressure sensor, The uniformity factor for the load is applied.

[0011] According to the present invention, the load distribution variation coefficient at the i-th moment is determined based on the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data, and the rotation angle, including: obtaining the maximum value of the first initial pressure data, and the first serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second initial pressure data, and the second serial number of the second pressure sensor corresponding thereto; obtaining the maximum value of the first pressure data at the i-th moment, and the third serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second pressure data at the i-th moment, and the fourth serial number of the second pressure sensor corresponding thereto; determining the load distribution variation coefficient at the i-th moment based on the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number, and the rotation angle.

[0012] According to the present invention, the load distribution variation coefficient at the i-th moment is determined based on the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number, and the rotation angle, including: according to the formula , determine the load distribution variation coefficient at the i-th moment ,in, is the maximum value of the first pressure data at the i-th moment, is the maximum value of the first initial pressure data, is the maximum value of the second pressure data at the i-th moment, is the maximum value of the second initial pressure data, is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, is the number of the first pressure sensor, is the number of the second pressure sensor, is the rotation angle at the i-th moment, max is the maximum value function, and floor is the rounding function.

[0013] According to the present invention, the load rotation safety factor at the i-th moment is determined based on the rotation angles at the i-th moment and each moment before the i-th moment, including: according to the formula , determine the load rotation safety factor at the i-th moment ,in, is the rotation angle at the i-th moment, is the rotation angle at the i-1th moment, is the rotation angle at the kth moment, is the rotation angle at the k-1th moment, 1≤k≤i-1, and both k and i are positive integers.

[0014] According to a second aspect of the present invention, a load monitoring system for a steel truss rotating turntable is provided, comprising: a first setting module for setting a plurality of first pressure sensors at the center of the bottom surface of the upper turntable of the rotating turntable; a second setting module for setting a plurality of second pressure sensors at the edge of the bottom surface of the upper turntable; an initial pressure module for obtaining first initial pressure data detected by the plurality of first pressure sensors and second initial pressure data detected by the plurality of second pressure sensors before the steel truss carried on the rotating turntable starts to rotate; a pressure data module for obtaining first pressure data detected by the plurality of first pressure sensors and second pressure data detected by the plurality of second pressure sensors, as well as the rotation angle of the steel truss at multiple moments during the rotation of the steel truss carried on the rotating turntable; a rotating turntable load state parameter module for determining the load state parameters of the rotating turntable based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle; and a safety state module for determining the load safety state of the rotating turntable based on the rotating turntable load state parameters.

[0015] Technical Effect: According to the present invention, comprehensive measurements can be performed using a first pressure sensor provided on the central support and a second pressure sensor provided on the bottom surface of the upper turntable, thereby determining the load status of the rotating turntable at multiple moments during the rotation process, thereby determining the safety status of the rotating turntable. This facilitates the timely identification of safety hazards and risks during the rotation process, and allows for timely adjustments to be made, facilitating the smooth completion of the rotation process. When determining the load uniformity coefficient, the relative difference between the maximum and minimum values of the initial pressure data can be used to indicate the uniformity of the load application, and the azimuth angle corresponding to the pressure sensor corresponding to the maximum load value can be used to indicate the consistency of the load distribution at the center and around the rotating turntable. These two aspects are combined to comprehensively describe the overall uniformity of the load loading. This improves the accuracy and objectivity of the load uniformity coefficient of the rotating turntable. Furthermore, the ratio of the overall load uniformity at various moments after the start of the rotation process to that before the start of the rotation process can be determined to determine the relative uniformity of the load distribution. Changes in the uniformity of the load distribution and the presence of a risk of tipping can be monitored at multiple moments, improving monitoring accuracy. When determining the load distribution variation coefficient, the stability of the load application orientation can be determined by comparing the theoretical and actual values of the rotation angle. The stability of the torque exerted by the steel truss on the rotating turntable can be determined by the relative deviation between the pressure data at the i-th moment and the initial pressure data. This allows the load distribution variation coefficient to be obtained, accurately and objectively describing the load distribution variation and the risk of the steel truss tipping or shaking. When determining the load rotation safety factor, the uniformity of the rotation process can be represented by the uniformity of the angular velocity within the time interval between each moment. This objectively reflects the safety of the rotation process and the probability of risks such as tipping, thereby improving the objectivity and accuracy of the load rotation safety factor.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and not limiting of the present invention. Other features and aspects of the present invention will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can derive other embodiments based on these drawings without inventive efforts.

[0018] Figure 1 A flow chart of a method for monitoring the load of a steel truss swivel turntable according to an embodiment of the present invention is exemplarily shown;

[0019] Figure 2The following is a block diagram of a steel truss girder swivel turntable load monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0022] Figure 1 A flowchart of a method for monitoring the load of a steel truss rotating turntable according to an embodiment of the present invention is exemplarily shown, the method comprising: step S101, setting a plurality of first pressure sensors at the center of the bottom surface of the upper turntable of the rotating turntable; step S102, setting a plurality of second pressure sensors at the edge of the bottom surface of the upper turntable; step S103, obtaining first initial pressure data detected by the plurality of first pressure sensors and second initial pressure data detected by the plurality of second pressure sensors before the steel truss carried on the rotating turntable starts to rotate; step S104, obtaining first pressure data detected by the plurality of first pressure sensors and second pressure data detected by the plurality of second pressure sensors, as well as the rotation angle of the steel truss at multiple moments during the rotation of the steel truss carried on the rotating turntable; step S105, determining the load state parameters of the rotating turntable based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle; step S106, determining the load safety state of the rotating turntable based on the load state parameters of the rotating turntable.

[0023] According to the load monitoring method of the steel truss rotating turntable in an embodiment of the present invention, comprehensive measurement can be performed through a first pressure sensor set on the central pillar and a second pressure sensor set on the bottom surface of the upper turntable, so as to determine the load state of the rotating turntable at multiple moments during the rotation process, thereby determining the safety state of the rotating turntable, making it easy to timely discover safety hazards and risks in the rotation process, and make timely adjustments, which is conducive to the smooth completion of the rotation process.

[0024] According to one embodiment of the present invention, the rotating turntable may include an upper turntable and a lower turntable, the upper turntable can carry the steel truss for rotation, and the lower turntable can remain fixed, wherein the bottom surface of the upper turntable and the top surface of the lower turntable are in contact and can rotate relative to each other, and a lubricating layer can be provided on the contact surface to reduce the resistance during rotation.

[0025] According to one embodiment of the present invention, in step S101, when installing the rotating turntable, a plurality of first pressure sensors can be evenly arranged at the center of the bottom surface of the upper turntable. The first pressure sensor can be a piezoelectric pressure sensor that can generate an electrical signal when under pressure, so that the pressure value it carries can be determined based on the measured electrical signal. The first pressure sensors can be evenly distributed at the center of the bottom surface of the upper turntable. For example, a circle with a small radius (much smaller than the radius of the bottom surface of the upper turntable) can be arranged with the centroid of the bottom circle as the center. The first pressure sensors can be evenly distributed on the circle with a small radius and can remain fixed to the bottom surface of the upper turntable. Furthermore, a lubricating layer can be laid on the upper surface of the first pressure sensors so that the lower surface of the first pressure sensors and the upper surface of the lower turntable can slide smoothly relative to each other during rotation.

[0026] According to one embodiment of the present invention, in step S102, when installing the rotating turntable, multiple second pressure sensors may be evenly distributed along the bottom edge of the upper turntable. The second pressure sensors may also be piezoelectric pressure sensors. The second pressure sensors may be fixed to the bottom surface of the upper turntable. Furthermore, a lubricating layer may be provided on the upper surface of the second pressure sensors, thereby allowing the lower surface of the second pressure sensors to slide smoothly relative to the upper surface of the lower turntable during rotation. The number of first and second pressure sensors may be equal.

[0027] According to one embodiment of the present invention, in step S103, after the steel truss is placed on the rotating turntable and before the rotation begins, first initial pressure data and second initial pressure data may be obtained as reference data.

[0028] According to one embodiment of the present invention, in step S104, the first pressure data and the second pressure data can be read at multiple moments during the rotation process, and the rotation angle can also be obtained, so that based on these data and the above-mentioned first initial pressure data and second initial pressure data, the load state and safety state of the rotating turntable can be determined, and it can be judged whether there is a risk of tipping during the rotation process.

[0029] According to one embodiment of the present invention, in step S105, the load state parameters of the rotating turntable can be determined based on the above data to describe the load distribution state and provide a data basis for determining whether there is a safety risk in the rotation process.

[0030] According to one embodiment of the present invention, the load state parameters of the rotating turntable are determined according to the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle, including: determining the load loading uniformity coefficient of the rotating turntable according to the first initial pressure data and the second initial pressure data; determining the load uniformity coefficient at the i-th moment according to the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss carried on the rotating turntable, and the load loading uniformity coefficient; determining the load distribution variation coefficient at the i-th moment according to the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data and the rotation angle; determining the load rotation safety factor at the i-th moment according to the rotation angles at the i-th moment and each moment before the i-th moment; determining the load state parameters of the rotating turntable at the i-th moment according to the load uniformity coefficient, the load distribution variation coefficient and the load rotation safety factor at the i-th moment.

[0031] According to one embodiment of the present invention, the load uniformity coefficient of the rotating turntable can be used to describe the uniformity of the load loading before the rotation process begins, for example, the uniformity of the load borne by the rotating turntable when the steel truss is set on the rotating turntable.

[0032] According to one embodiment of the present invention, the load uniformity coefficient of the rotating turntable is determined based on the first initial pressure data and the second initial pressure data, including: determining the load uniformity coefficient of the rotating turntable according to formula (1): :

[0033] (1)

[0034] in, is the maximum value of the first initial pressure data, is the minimum value of the first initial pressure data, is the average value of the first initial pressure data, is the maximum value of the second initial pressure data, is the minimum value of the second initial pressure data, is the average value of the second initial pressure data, max is the maximum value function, is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, is the number of the first pressure sensor, is the number of the second pressure sensors.

[0035] According to one embodiment of the present invention, in formula (1), is the difference between the maximum and minimum values of the first initial pressure data, is the relative difference between the maximum and minimum values of the first initial pressure data. The larger the difference, the more uneven the load application. The relative difference between the maximum and minimum values of the second initial pressure data is greater. The greater the difference, the more uneven the load is applied. The maximum value of the two can be used to describe the degree of uneven load application. It can indicate the uniformity of load application.

[0036] According to one embodiment of the present invention, It can be used to indicate the azimuth angle of the first pressure sensor corresponding to the maximum value of the first initial pressure data. As mentioned above, the first pressure sensors are evenly distributed at the center of the lower surface of the upper turntable. Therefore, the azimuth angle of the first pressure sensor increases evenly with the increase of the sequence number of the first pressure sensor. Therefore, That is, the azimuth angle of the first pressure sensor corresponding to the maximum value of the first initial pressure data. Similarly, is the azimuth angle of the second pressure sensor corresponding to the maximum value of the second initial pressure data, That is, it is the difference between the azimuth angle of the first pressure sensor corresponding to the maximum value of the first initial pressure data and the azimuth angle of the second pressure sensor corresponding to the maximum value of the second initial pressure data. The larger the difference, the greater the difference in load distribution at the center of the rotating turntable and around the rotating turntable, which may also indicate uneven load distribution. It can indicate the relative distribution difference of load at the center and around the turntable. It can indicate the distribution consistency of the load at the center and around the turntable.

[0037] According to one embodiment of the present invention, It is the load uniformity coefficient of the rotating turntable, which can be used to describe the overall uniformity of load loading.

[0038] In this way, the relative difference between the maximum and minimum values of the initial pressure data can be used to indicate the uniformity of load application. The azimuth angle of the pressure sensor corresponding to the maximum load value can be used to indicate the consistency of load distribution around the center and periphery of the turntable. Combining these two aspects, we can comprehensively describe the overall uniformity of load application, thereby improving the accuracy and objectivity of the load uniformity coefficient of the turntable.

[0039] According to one embodiment of the present invention, the load uniformity coefficient at the i-th moment is determined based on the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss supported on the rotating turntable, and the load loading uniformity coefficient, including: determining the load uniformity coefficient at the i-th moment according to formula (2): :

[0040] (2)

[0041] in, is the maximum value of the first pressure data at the i-th moment, is the minimum value of the first pressure data at the i-th moment, is the average value of the first pressure data at the i-th moment, is the maximum value of the second pressure data at the i-th moment, is the minimum value of the second pressure data at the i-th moment, is the average value of the second pressure data at the i-th moment, max is the maximum value function, is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, is the number of the first pressure sensor, is the number of the second pressure sensor, The uniformity factor for the load is applied.

[0042] According to one embodiment of the present invention, in formula (2), The interpretation of each term in is similar to that in formula (1) and will not be repeated here. The product can represent the overall uniformity of the load at the i-th moment. It indicates the overall uniformity of the load before the rotation process begins, so It indicates the relative uniformity of the load at the i-th moment and before the rotation process begins. It can also be used to determine whether the uniformity of the load changes as the rotation process proceeds. If , it means that the load distribution remains stable and the risk of tipping is low. , it means that the unevenness of the load distribution has increased, the load distribution cannot remain stable, and there is a risk of tipping over.

[0043] In this way, the ratio of the overall uniformity of the load at each moment after the rotation process starts to that before the rotation process starts can be determined, thereby determining the relative uniformity of the load distribution. It is also possible to monitor at multiple moments whether the uniformity of the load distribution changes and whether there is a risk of tipping, thereby improving the accuracy of monitoring.

[0044] According to one embodiment of the present invention, the load distribution variation coefficient at the i-th moment is determined based on the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data, and the rotation angle, including: obtaining the maximum value of the first initial pressure data, and the first serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second initial pressure data, and the second serial number of the second pressure sensor corresponding thereto; obtaining the maximum value of the first pressure data at the i-th moment, and the third serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second pressure data at the i-th moment, and the fourth serial number of the second pressure sensor corresponding thereto; determining the load distribution variation coefficient at the i-th moment based on the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number, and the rotation angle.

[0045] According to one embodiment of the present invention, determining the load distribution variation coefficient at the i-th moment based on the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number, and the rotation angle includes: determining the load distribution variation coefficient at the i-th moment according to formula (3): :

[0046] (3)

[0047] in, is the maximum value of the first pressure data at the i-th moment, is the maximum value of the first initial pressure data, is the maximum value of the second pressure data at the i-th moment, is the maximum value of the second initial pressure data, is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, is the number of the first pressure sensor, is the number of the second pressure sensor, is the rotation angle at the i-th moment, max is the maximum value function, and floor is the rounding function.

[0048] According to one embodiment of the present invention, in formula (3), the angle difference between the two first pressure sensors is , when the rotation angle is When the load distribution does not change, the change rule of the serial number of the pressure sensor that detects the maximum value of the first pressure data is theoretically as follows: , then the first pressure sensor that detects the maximum value of the first pressure data remains unchanged, if , then the change in the sequence number of the first pressure sensor that detects the maximum value of the first pressure data is 1, if , then the change in the serial number of the first pressure sensor that detects the maximum value of the first pressure data is 2... That is, When the angle bisector of the azimuth angles of the two first pressure sensors is exceeded, the number of the pressure sensor that detects the maximum value of the first pressure data changes once. Based on this rule, theoretically, the rotation angle is When the maximum value of the first pressure data is detected, the theoretical serial number change of the first pressure sensor is , and the actual serial number change of the first pressure sensor that detects the maximum value of the first pressure data is The change in the serial number is equivalent to the change in the azimuth angle of the first pressure sensor that detects the maximum value of the first pressure data. Therefore, the difference between the theoretical serial number change and the actual serial number change can be used to describe the change in the azimuth angle of the first pressure sensor that detects the maximum value of the first pressure data. It can also indicate that the load application direction has changed relative to the initial state. That is, the steel truss is not only rotating, but may also tilt or shake, causing the load application direction to change. It can represent the relative change in the load application direction detected by the first pressure sensor. The greater the relative change, the greater the load distribution change, and the higher the probability of the risk of tipping, shaking, etc. The maximum value of the two can be taken as the total change in the load application direction, and the stability of the load application direction can be expressed by subtracting the maximum value from 1.

[0049] According to one embodiment of the present invention, It can represent the relative difference between the maximum value of the first pressure data at the i-th moment and the maximum value of the first initial pressure data. If the steel truss beam tilts or shakes, the moment of the steel truss beam on the turntable may change, causing the relative difference to be non-zero. The greater the relative difference, the greater the change in the moment of the steel truss beam on the turntable, the greater the change in load distribution, and the higher the risk of the steel truss beam tilting or shaking. Similarly, It can also represent the change in the moment of the steel truss on the turntable. The maximum value of the two can be taken to represent the change in the overall moment of the steel truss on the turntable. 1 minus the maximum value can represent the stability of the moment of the steel truss on the turntable.

[0050] According to one embodiment of the present invention, the load distribution variation coefficient at the i-th moment is obtained by multiplying the above-mentioned terms representing the stability of the load application orientation and the stability of the torque of the steel truss on the rotating turntable. The larger the coefficient is, the closer the load distribution is to the initial state, that is, the load distribution remains stable. Otherwise, it means that the load distribution has changed and the steel truss is at risk of tipping over, shaking, etc.

[0051] In this way, the stability of the load application orientation can be determined by comparing the theoretical value and the actual value of the rotation angle, and the stability of the torque of the steel truss on the rotating turntable can be determined by the relative deviation between the pressure data at the i-th moment and the initial pressure data, thereby obtaining the load distribution variation coefficient to accurately and objectively describe the change in load distribution and the risk of the steel truss tipping or shaking.

[0052] According to one embodiment of the present invention, the load rotation safety factor at the i-th moment is determined based on the rotation angles at the i-th moment and each moment before the i-th moment, including: determining the load rotation safety factor at the i-th moment according to formula (4): :

[0053] (4)

[0054] in, is the rotation angle at the i-th moment, is the rotation angle at the i-1th moment, is the rotation angle at the kth moment, is the rotation angle at the k-1th moment, 1≤k≤i-1, and both k and i are positive integers.

[0055] According to one embodiment of the present invention, in formula (4), represents the average angular velocity over the past i-1 moments, so, is the difference between the angular velocity of the time period between the i-1th moment and the i-th moment and the average angular velocity of the past i-1 moments, is the time interval between adjacent moments. Therefore, is the relative deviation between the angular velocity of the time period between the i-1th moment and the i-th moment and the average angular velocity of the past i-1 moments. The larger the relative deviation, the greater the change in the angular velocity of the time period between the i-1th moment and the i-th moment, indicating that there may be a sudden increase or decrease in the rotational resistance between the i-1th moment and the i-th moment. This may be caused by a change in the torque of the steel truss on the rotating turntable. The change in the torque of the steel truss on the rotating turntable indicates that the steel truss may face the risk of tipping over, which is an unsafe condition. Therefore, It can indicate the uniformity of angular velocity over multiple past moments, and can also indicate the uniformity and safety of the rotation process. The higher the load rotation safety factor at the i-th moment, the higher the rotation safety at that moment, and the lower the probability of risks such as tipping.

[0056] In this way, the uniformity of the rotation process can be expressed by the uniformity of the angular velocity in the time interval between each moment, thereby objectively reflecting the safety of the rotation process and the probability of risks such as tipping, and improving the objectivity and accuracy of the load rotation safety factor.

[0057] According to one embodiment of the present invention, after obtaining the load uniformity coefficient, load distribution variation coefficient and load rotation safety factor at the i-th moment, a weighted summation can be performed to determine the load state parameter of the rotating turntable at the i-th moment. The larger the load state parameter of the rotating turntable, the more stable the load distribution state of the rotating turntable, and the more uniform and safe the rotation process.

[0058] According to one embodiment of the present invention, in step S106, the load safety state of the rotating turntable can be determined based on the load state parameter of the rotating turntable. For example, a safety threshold value (for example, 0.8) can be set. If the load state parameter of the rotating turntable is higher than or equal to the safety threshold value, it is determined that the rotating turntable is in a safe state. Otherwise, it can be determined that the rotating turntable is in an unsafe state and timely remedial measures are required. For example, external force can be applied to the steel truss by traction equipment, etc. to reduce the risk of the steel truss tipping over.

[0059] According to an embodiment of the present invention, a method for monitoring the load on a steel truss swivel turntable utilizes a first pressure sensor located on the center support and a second pressure sensor located on the bottom surface of the upper turntable for comprehensive measurement. This allows for the determination of the load status of the turntable at multiple moments during the rotation process, thereby determining the turntable's safety status. This facilitates the timely identification of safety hazards and risks during the rotation process, allowing for timely adjustments and facilitating the smooth completion of the rotation process. When determining the load uniformity coefficient, the relative difference between the maximum and minimum values of the initial pressure data indicates the uniformity of the load application, while the azimuth angle corresponding to the pressure sensor corresponding to the maximum load value indicates the consistency of the load distribution around the center and periphery of the turntable. This combination of factors provides a comprehensive description of the overall load uniformity. This improves the accuracy and objectivity of the turntable's load uniformity coefficient. Furthermore, the ratio of the overall load uniformity at various moments after the start of the rotation process to that before the start of the rotation process can be determined to determine the relative uniformity of the load distribution. Furthermore, changes in the load distribution uniformity and the presence of a risk of tipping can be monitored at multiple moments, improving monitoring accuracy. When determining the load distribution variation coefficient, the stability of the load application orientation can be determined by comparing the theoretical and actual values of the rotation angle. The stability of the torque exerted by the steel truss on the rotating turntable can be determined by the relative deviation between the pressure data at the i-th moment and the initial pressure data. This allows the load distribution variation coefficient to be obtained, accurately and objectively describing the load distribution variation and the risk of the steel truss tipping or shaking. When determining the load rotation safety factor, the uniformity of the rotation process can be represented by the uniformity of the angular velocity within the time interval between each moment. This objectively reflects the safety of the rotation process and the probability of risks such as tipping, thereby improving the objectivity and accuracy of the load rotation safety factor.

[0060] Figure 2A block diagram of a load monitoring system for a steel truss rotating turntable according to an embodiment of the present invention is exemplarily shown. The system includes: a first setting module for setting a plurality of first pressure sensors at the center of the bottom surface of the upper turntable of the rotating turntable; a second setting module for setting a plurality of second pressure sensors at the edge of the bottom surface of the upper turntable; an initial pressure module for obtaining first initial pressure data detected by the plurality of first pressure sensors and second initial pressure data detected by the plurality of second pressure sensors before the steel truss carried on the rotating turntable starts to rotate; a pressure data module for obtaining first pressure data detected by the plurality of first pressure sensors and second pressure data detected by the plurality of second pressure sensors, as well as the rotation angle of the steel truss at multiple moments during the rotation of the steel truss carried on the rotating turntable; a rotating turntable load state parameter module for determining the rotating turntable load state parameter based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data, and the rotation angle; and a safety state module for determining the rotating turntable load safety state based on the rotating turntable load state parameter.

[0061] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing various aspects of the present invention.

[0062] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A method for monitoring the load of a steel truss swivel turntable, characterized in that: include: A plurality of first pressure sensors are arranged at the center of the bottom surface of the upper turntable of the rotary body; A plurality of second pressure sensors are arranged on the bottom edge of the upper turntable; Before the steel truss supported on the rotating turntable starts to rotate, first initial pressure data detected by a plurality of first pressure sensors and second initial pressure data detected by a plurality of second pressure sensors are obtained; At multiple moments during the rotation of the steel truss supported on the rotating turntable, first pressure data detected by multiple first pressure sensors and second pressure data detected by multiple second pressure sensors, as well as a rotation angle of the steel truss, are obtained; determining a load state parameter of a rotating turntable according to the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data, and the rotation angle; Determining a safe load state of the turntable according to the turntable load state parameter; Determining the load state parameters of the rotating turntable according to the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data and the rotation angle, including: determining the load loading uniformity coefficient of the rotating turntable according to the first initial pressure data and the second initial pressure data; determining the load uniformity coefficient at the i-th moment according to the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss supported on the rotating turntable, and the load loading uniformity coefficient; determining the load distribution variation coefficient at the i-th moment according to the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data and the rotation angle; determining the load rotation safety factor at the i-th moment according to the rotation angles at the i-th moment and each moment before the i-th moment; determining the load state parameters of the rotating turntable at the i-th moment according to the load uniformity coefficient, the load distribution variation coefficient and the load rotation safety factor at the i-th moment; Determining the load uniformity coefficient of the rotating turntable according to the first initial pressure data and the second initial pressure data includes: according to the formula Determine the load uniformity coefficient E of the rotating turntable L , where F 1，ini，max is the maximum value of the first initial pressure data, F 1，ini，min is the minimum value of the first initial pressure data, F 1，ini，ave is the average value of the first initial pressure data, F 2，ini，max is the maximum value of the second initial pressure data, F 2，ini，min is the minimum value of the second initial pressure data, F 2，ini，ave is the average value of the second initial pressure data, max is the maximum value function, num 1，ini，max is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, num 2，ini，max is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, n1 is the number of the first pressure sensors, and n2 is the number of the second pressure sensors.

2. The method for monitoring the load of a steel truss swivel turntable according to claim 1, characterized in that: According to the first pressure data and the second pressure data at the i-th moment during the rotation of the steel truss supported on the rotating turntable, and the load uniformity coefficient, the load uniformity coefficient at the i-th moment is determined, including: according to the formula Determine the load uniformity coefficient E at the i-th moment LE，i , where F 1，i，max is the maximum value of the first pressure data at the i-th moment, F 1，i，min is the minimum value of the first pressure data at the i-th moment, F 1，i，ave is the average value of the first pressure data at the i-th moment, F 2，i，max is the maximum value of the second pressure data at the i-th moment, F 2，i，min is the minimum value of the second pressure data at the i-th moment, F 2，i，ave is the average value of the second pressure data at the i-th moment, max is the maximum value function, num 1，i，max is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, num 2，i，max is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, n1 is the number of the first pressure sensors, n2 is the number of the second pressure sensors, E L The uniformity factor for the load is applied.

3. The method for monitoring the load of a steel truss swivel turntable according to claim 1, wherein: According to the first pressure data and the second pressure data at the i-th moment, the first initial pressure data and the second initial pressure data and the rotation angle, the load distribution variation coefficient at the i-th moment is determined, including: obtaining the maximum value of the first initial pressure data, and the first serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second initial pressure data, and the second serial number of the second pressure sensor corresponding thereto; obtaining the maximum value of the first pressure data at the i-th moment, and the third serial number of the first pressure sensor corresponding thereto; obtaining the maximum value of the second pressure data at the i-th moment, and the fourth serial number of the second pressure sensor corresponding thereto; determining the load distribution variation coefficient at the i-th moment according to the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number and the rotation angle.

4. The method for monitoring the load of a steel truss swivel turntable according to claim 3, wherein: Determining the load distribution variation coefficient at the i-th moment according to the maximum value of the first initial pressure data, the first serial number, the maximum value of the second initial pressure data, the second serial number, the maximum value of the first pressure data at the i-th moment, the third serial number, the maximum value of the second pressure data at the i-th moment, the fourth serial number, and the rotation angle includes: according to the formula Determine the load distribution variation coefficient E at the i-th moment LC，i , where F 1，i，max is the maximum value of the first pressure data at the i-th moment, F 1，ini，max is the maximum value of the first initial pressure data, F 2，i，max is the maximum value of the second pressure data at the i-th moment, F 2，ini，max is the maximum value of the second initial pressure data, num 1，i，max is the third serial number of the first pressure sensor corresponding to the maximum value of the first pressure data at the i-th moment, num 1，ini，max is the first serial number of the first pressure sensor corresponding to the maximum value of the first initial pressure data, num 2，i，max is the fourth serial number of the second pressure sensor corresponding to the maximum value of the second pressure data at the i-th moment, num 2，ini，max is the second serial number of the second pressure sensor corresponding to the maximum value of the second initial pressure data, n1 is the number of the first pressure sensors, n2 is the number of the second pressure sensors, θ i is the rotation angle at the i-th moment, max is the maximum value function, and floor is the rounding function.

5. The method for monitoring the load of a steel truss swivel turntable according to claim 1, wherein: According to the rotation angles at the i-th moment and each moment before the i-th moment, determine the load rotation safety factor at the i-th moment, including: according to the formula Determine the load rotation safety factor E at the i-th moment T，i , where θ i is the rotation angle at the i-th moment, θ i-1 is the rotation angle at the i-1th moment, θ k is the rotation angle at the kth moment, θ k-1 is the rotation angle at the k-1th moment, 1≤k≤i-1, and both k and i are positive integers.

6. A steel truss beam swivel turntable load monitoring system, used to perform the method according to any one of claims 1 to 5, characterized in that: include: A first setting module is used to set a plurality of first pressure sensors at the center of the bottom surface of the upper turntable of the rotating body; A second setting module is used to set a plurality of second pressure sensors on the bottom edge of the upper turntable; An initial pressure module, configured to obtain first initial pressure data detected by a plurality of first pressure sensors and second initial pressure data detected by a plurality of second pressure sensors before the steel truss beam carried on the rotating turntable starts to rotate; a pressure data module, configured to obtain, at multiple moments during the rotation of the steel truss supported on the rotating turntable, first pressure data detected by a plurality of first pressure sensors and second pressure data detected by a plurality of second pressure sensors, as well as a rotation angle of the steel truss; a swivel turntable load state parameter module, configured to determine a swivel turntable load state parameter based on the first initial pressure data, the second initial pressure data, the first pressure data, the second pressure data, and the rotation angle; The safety status module is used to determine the safety status of the swivel turntable load according to the swivel turntable load status parameter.

Images