CN113483933A - Tensiometer system and steel wire rope tension measuring method - Google Patents
Tensiometer system and steel wire rope tension measuring method Download PDFInfo
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- CN113483933A CN113483933A CN202110863001.9A CN202110863001A CN113483933A CN 113483933 A CN113483933 A CN 113483933A CN 202110863001 A CN202110863001 A CN 202110863001A CN 113483933 A CN113483933 A CN 113483933A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/102—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors located at a non-interrupted part of the flexible member
Abstract
The invention relates to a tensiometer system and a tension measuring method, wherein the system comprises an angle measuring module for measuring the size of a bending angle generated by deformation in the process of pulling a steel wire rope, a slave control module connected with the angle measuring module for receiving bending angle information, a tension measuring module for measuring the tension value of the steel wire rope in the pulling process, and a master control module respectively connected with the tension measuring module and the slave control module for receiving the tension value and the bending angle information sent by the slave control module; the main control module is also used for judging the tension value and the bending angle, recording the current tension value when the tension value reaches a set value or the bending angle reaches a preset value, converting the tension value reaching the set value into the tension value when the bending angle is the preset value, and judging whether the tension of the steel wire rope is qualified or not by comparing all the tension values with the threshold value when the bending angle is the preset value. The structure and the method improve the measurement accuracy and the operation convenience.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a tensiometer system and a steel wire rope tension measuring method.
Background
The tension of the elevator wire rope is an important factor influencing the comfort and safety of the elevator. At present, two main detection means for the tension of the steel wire rope of the elevator are provided, one is to adopt a traditional spring dynamometer, and the other is to adopt an electronic meter.
Traditional spring dynamometer needs operating personnel to stand at the sedan-chair top, with the spring dynamometer with each wire rope level pulling the same distance one by one after, artificial record every wire rope's pulling force value. This kind of mode needs operating personnel to compromise 2 physical quantities of distance and pulling force simultaneously, leads to the operation inconvenience, inefficiency, measurement accuracy hang down.
The electronic meter mainly comprises three types, namely a DSG type meter, a WSG type meter and an HD type meter, but the three types of meters are developed by utilizing the principle of a three-point method. These two kinds of dynamometers of DSG type and HD type are bulky, need support wire rope both ends during the measurement, and middle loading atress, and elevator wire rope arranges closely, leads to having mutual interference between meter and the wire rope, and difficult measurement, and need manual loading to make the radial tensile displacement of surveying the wire rope equal, has fine motion to adjust, and it is not high to take time and the precision. The WSG type measuring meter needs to screw a bolt to fix the sensor on the steel wire rope, and has the defects of troublesome tooling, time consumption and difficult control of radial displacement of the steel wire rope.
More importantly, different steel wire ropes have the problem of uneven tension in the use process, the tension of some steel wire ropes is increased along with the increase of the use time, and the steel wire ropes are not easy to be pulled to the set same distance in the measurement process to measure the tension.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a tension gauge system that can select a corresponding measurement scheme according to the characteristics of a steel wire rope so as to accurately and efficiently measure tension, and that has a small and light volume, is convenient to carry, and is easy to operate and intelligent.
The invention also aims to provide a corresponding steel wire rope tension measuring method.
In order to achieve the purpose, the technical scheme of the invention is as follows: a tensiometer system characterized by: the system comprises a plurality of devices which are connected with each other,
the angle measuring module is used for measuring the size of a bending angle generated by deformation in the process of pulling the steel wire rope;
the slave control module is connected with the angle measuring module to receive bending angle information;
the tension measuring module is used for measuring the tension value of the steel wire rope in the pulling process;
the master control module is respectively connected with the tension measuring module and the slave control module to receive the tension value and the bending angle information sent by the slave control module;
the main control module is also used for judging the received tension value and the bending angle, recording the current tension value when the tension value reaches a set value or the bending angle reaches a preset value, converting the tension value reaching the set value into the tension value when the bending angle is the preset value, and comparing all the tension values when the bending angle is the preset value with a threshold value to judge whether the tension of the corresponding steel wire rope is qualified.
Further, the angle measuring module comprises a tool structure which can be clamped on the steel wire rope and an angle sensor which is arranged on the tool structure and used for detecting the opening angle of the tool structure;
the tool structure comprises an upper rotating rod mechanism and a lower rotating rod mechanism, wherein the upper end part of the steel wire rope can extend into the upper rotating rod mechanism and can be sleeved with the lower end part of the steel wire rope;
the lower end of the upper rotating rod mechanism is rotatably connected with the upper end of the lower rotating rod mechanism so as to be pulled along with the steel wire rope between the upper rotating rod mechanism and the lower rotating rod mechanism to rotate relatively, and the opening angle formed between the upper rotating rod mechanism and the lower rotating rod mechanism is equal to the bending angle generated by the deformation of the steel wire rope;
the angle sensor is connected with the slave control module and provides bending angle information by transmitting the detected opening angle information to the slave control module.
Further, the conversion formula adopted for converting the tension value reaching the set value into the tension value under the condition that the bending angle is the preset value is as follows:
f1 '═ tan β'. F1/tan α | tan γ '. F1/tan α |, wherein F1 is a set value, α is an opening angle variation due to deformation of the wire rope when the tension value reaches the set value, γ' is a predetermined value, β 'is an opening angle of the tool structure measured by the angle measuring module when the bending angle is the predetermined value, and γ' ═ β ', F1' is a corresponding tension value when the bending angle is the predetermined value.
Furthermore, the tension meter system also comprises a display module which is connected with the main control module and can display the tension value and the judgment result in real time.
Furthermore, the tensiometer system also comprises an audible and visual alarm module which is connected with the main control module and is triggered by the main control module to perform audible and visual alarm to prompt an operator to stop pulling continuously when the tension value reaches a set value or the bending angle reaches a preset value.
Further, angle sensor is the AS5045 chip, main control module is the DSP chip with from control module, the audible-visual annunciator module is bee calling organ, the tension measurement module adopts the cantilever beam sensor, the display module comprises 2 block cascade 74HC595 driver chips who forms.
Further, the master control module and the slave control module are in wireless communication through an HC-12 wireless serial port receiving and sending module;
an HX711 type digital-to-analog conversion chip for amplifying voltage signals output by the tension difference output by the tension measuring module is also arranged between the tension measuring module and the main control module.
A method for measuring the tension of a steel wire rope is characterized by comprising the following steps: the method comprises the following steps of,
s1, judging whether the bending angle reaches a preset value or whether the tension value reaches a set value, if so, recording the current tension value, and if not, continuously judging the bending angle and the preset value and the tension value and the set value;
s2, judging whether the tension value is a set value in all the recorded tension values, if so, executing S3, and if not, executing S4;
s3, converting the tension value with the set value into the tension value when the bending angle is the preset value, and executing S4;
s4, comparing all corresponding tension values with a threshold value one by one under the condition that the bending angle is a preset value, if the difference value between the tension value and the threshold value is in an error range, judging that the tension of the steel wire rope corresponding to the tension value is qualified, otherwise, judging that the steel wire rope is unqualified.
Further, the threshold value is obtained by summing and averaging the tension values of all bending angles with preset values.
Further, the error range is ± 0.05.
Compared with the prior art, the invention has the advantages that:
the characteristics that the pulling distances are required to be kept equal to measure the tension when the tension is measured, the bending angles generated corresponding to the deformation of the steel wire rope when the tension is measured to be equal are equal, and the relative distances of the bending angles are easier to measure are utilized, so that the measurement factors ensuring equal distances are skillfully converted into equal angles, and the measurement accuracy is improved; the cooperative matching of angle measurement and tension measurement is realized by means of lightness, convenience and simplicity of electronic components, so that the convenient and accurate measurement, convenience, smallness and convenience for carrying of a tensiometer system are realized; according to the tension tensity characteristic of the steel wire rope, the steel wire rope which is high in tension tensity and not easy to pull adopts the situation that the tension value reaches a set value as a reference standard and is converted into the tension value when the bending angle under conventional measurement is equal to a preset value by using a conversion formula, and for the steel wire rope which is not high in tension and easy to pull, a common reference measurement mode that the bending angle is equal to the preset value is adopted, so that the problem that the measurement accuracy is not high due to inconvenient operation in the actual measurement process of the steel wire rope is solved ingeniously.
Drawings
Fig. 1 is an overall configuration diagram of a tensiometer system according to the present application.
Fig. 2 is a schematic circuit diagram of a slave control module according to the present application.
FIG. 3 is a schematic diagram of a main control module circuit according to the present application.
Fig. 4 is a schematic diagram of the HC-12 wireless interface circuit of the present application.
FIG. 5 is a schematic circuit diagram of an AS5045 chip of the present application.
Fig. 6 is a schematic diagram of an HX711 digital-to-analog conversion circuit according to the present application.
Fig. 7 is a schematic diagram of a display module circuit.
Fig. 8 is a schematic view of a tooling structure in the present application.
Fig. 9 is a measurement flowchart of the present application.
Fig. 10 is a simplified measurement diagram of the tensiometer according to the present application.
Fig. 11 is a schematic view of the angle relationship in the process of pulling the steel wire rope.
Fig. 12 is a force analysis diagram during the pulling of the steel wire rope.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 to 12, a preferred embodiment of the tension gauge system of the present application includes an angle measuring module 1 for measuring a bending angle caused by deformation of a steel wire rope during pulling, a slave control module 2 connected to the angle measuring module 1 for receiving bending angle information, a tension measuring module 3 for measuring a tension value of the steel wire rope during pulling, and a master control module 4 connected to the tension measuring module 3 and the slave control module 2 for receiving the tension value and the bending angle information transmitted from the slave control module 2, respectively.
The main control module 4 is further configured to determine the received tension value and the bending angle, record a current tension value when the tension value reaches a set value or the bending angle reaches a predetermined value, convert the tension value reaching the set value into a tension value when the bending angle is the predetermined value, and compare all the tension values when the bending angle is the predetermined value with a threshold value to determine whether the corresponding tension of the wire rope is qualified.
Judging whether the elevator steel wire rope is qualified or not, and mostly comparing the corresponding tension values with the reference values under the same reference condition, wherein the same condition is mainly based on the premise that the steel wire rope is pulled to the same distance under the ideal environment, but as mentioned in the background technology, because the tension of the steel wire rope changes in the use process, the tension of some steel wire ropes is reduced after the steel wire ropes are used and the steel wire ropes are easy to pull, while the tension of some steel wire ropes is increased after the steel wire ropes are used and the set distance is difficult to pull, so that the required forces when the steel wire ropes are pulled to the same distance are different, for the steel wire ropes with higher tension values and higher tension, the steel wire ropes need to be pulled to the same distance environment to measure the tension, more force is required, and the operation of the steel wire ropes with more complex environments are inconvenient and the applicability is not strong.
Now, this application provides more simple and convenient efficient measurement scheme through the conversion to the wire rope that tension value tension degree is high through cleverly utilizing the relation between the power of all directions and the angle among the wire rope measurement process to solve the inconvenient problem of measurement that wire rope tension value inequality brought, concrete conversion mode will be elucidated in the following.
Meanwhile, as mentioned above, currently, it is only a relatively ideal state to measure the tension of the steel wire rope under the condition of the same distance by pulling the steel wire rope, and those skilled in the art know that, in view of the difference of the strength or experience of the operator, the pulled distance is easily caused to have a deviation, and the deviation often causes inaccurate tension measurement, especially the measurement mode of the traditional spring dynamometer.
The applicant discovers through analysis that for most of steel wire ropes, when the steel wire ropes are pulled to equal distances, the bending angles of the steel wire ropes during bending deformation are the same, and the relative distances of the angles can be measured more accurately, so that when the distances are converted into the angles, the uniformity of the measured angles can be ensured, the pulled distances are the same, and further, the condition for measuring the tension is ensured to be the same, so that the measuring accuracy is improved. Based on this, this application has provided an electron tensiometer system, can realize the automatic and accurate portably of measuring intelligence through this system, the big problem of deviation that greatly reduced tradition measurement exists.
Specifically, the angle measurement module 1 in this application includes the frock structure 11 that can centre gripping on wire rope and sets up and be used for detecting the angle sensor 12 of the opening angle size of frock structure 11 on frock structure 11. The tool structure 11 can deform on the steel wire rope along with the steel wire rope, and meanwhile, the deformation angle is kept consistent.
The structure has been protected in patent ZL201921211285.8, and specific structure can be seen from this patent and fig. 8 of this application, which includes an upper rotating rod mechanism 111 and a lower rotating rod mechanism 112, the upper end of the upper rotating rod mechanism 111 is formed with a first fixing ring 1111 for allowing the upper end portion of the steel wire rope to extend into the socket joint, the lower end of the lower rotating rod mechanism 112 is formed with a second fixing ring 1121 for allowing the lower end portion of the steel wire rope to extend into the socket joint, and the lower end of the upper rotating rod mechanism 111 is rotatably connected with the upper end of the lower rotating rod mechanism 112.
The angle sensor 12 is arranged between the upper rotating rod mechanism and the lower rotating rod mechanism and used for detecting an opening angle between the upper rotating rod mechanism and the lower rotating rod mechanism, the upper rotating rod mechanism and the lower rotating rod mechanism can rotate relatively along with the pulling of a steel wire rope between the upper rotating rod mechanism and the lower rotating rod mechanism, and the opening angle formed between the upper rotating rod mechanism and the lower rotating rod mechanism is equal to a bending angle formed by the pulling of the steel wire rope.
Like this, the opening angle value that angle sensor 12 detected is exactly the bending angle value that wire rope produced because of the deformation actually, and angle sensor 12 links to each other with from control module 2, then sends the opening angle information that detects for from control module 2 through it, just can know wire rope's bending angle information to through the cooperation between frock structure and the wire rope, ingenious realization is to the measurement of wire rope bending angle.
In the present application, the angle sensor 12 uses an AS5045 chip, and the slave control module uses a DSP chip, and specific circuit schematic diagrams are shown in fig. 5 and fig. 2.
In view of the complexity of the elevator environment, in order to facilitate signal transmission and system simplicity, the slave control module 2 is connected with the master control module 4 in a wireless manner, specifically, in the embodiment, the HC-12 wireless serial port transceiver module is used for wireless communication connection, and fig. 4 shows a schematic diagram of an interface circuit of the HC-12 wireless serial port transceiver module.
In actual measurement, the car is generally located at the lower part of the hoistway, the measurement point is located at 1m of a car top steel wire rope fulcrum (namely the tangent point of the car top diverting pulley and the steel wire rope), and the steel wire rope can be pulled horizontally by L meters in the radial direction during measurement. However, some steel wire ropes are too large in tension and are not easy to be pulled to L meters in a radial horizontal mode, in order to improve operation convenience, when a tensiometer system monitors that tension reaches P newtons, pulling is stopped continuously, and P storage is converted into a corresponding tension value when the steel wire ropes are pulled to L meters in a radial horizontal mode through conversion.
Specifically, in order to enable an operator to conveniently pull the steel wire rope horizontally and radially in a labor-saving manner, the positions of the tension points are unified, and the relation between the unified radial horizontal distance and the opening angle is conveniently established, the application provides that the tension points are at the positions 1m away from the fulcrum of the steel wire rope on the top of the lift car when the lift car is positioned at the lower part of the shaft, the horizontal radial pulling distance L is 0.1m, namely the preset value is 0.1 m.
Meanwhile, in order to reduce the error of angle detection and enable an operator to have a proper operation force of the tension meter, the application provides that for a steel wire rope with an overlarge tension value, the reference operation standard is that the tension value P reaches 100N, namely the set value is 100N, because if the tension force for pulling the steel wire rope horizontally and radially is greater than 100N, the operator feels hard, and the tension force is not greater than 100N from the aspect of convenience of use of the tension meter.
The wire rope fulcrum on the sedan-chair top has 2 kinds of forms, and the first kind is the anti-sheave formula of sedan-chair top, and the other kind is wire rope end formula, and no matter which kind of form, according to the installation standard requirement of elevator, the tangent point vertical alignment car of driving sheave and wire rope. For the first, the tangent point is required to be vertically aligned with the tangent point of the car roof diversion sheave and the steel wire rope; for the second, the tangent point is required to align the rope head plate center point. The form of the car roof diverting pulley is taken as an example since the two types of tension conversion methods are the same.
As shown in FIG. 10, point A is the tangent point of the traction sheave and the wire rope, and point B is the top return sheave and the wire ropeThe tangent point of the steel wire rope is vertically arranged from the traction wheel to the steel wire rope of the car top diversion sheave. 11 is a tooling structure, O1Is the rotation center of the up-and-down rotating mechanism of the tool structure, O2Is the tension point of the tension measuring module 3 and the steel wire rope.
BO is known from the above definition of the location of the tension measurement2When the operator measures the tension of the steel wire rope, as shown in fig. 11, the operator pulls the steel wire rope horizontally in the radial direction, the steel wire rope forms a bending angle γ at the pulled point, and simultaneously, the opening angle β formed between the upper and lower rotating mechanisms of the tool structure is equal to the bending angle γ in the pulling process.
According to the elevator structural arrangement, the traction sheave is located at the top of the shaft or in the machine room, and the measuring point is located at the lower part of the elevator shaft, known as AO2>>BO2Thus, when the operator pulls the wire rope in the horizontal right direction, the wire rope BO2Is bent and AO2Only moves horizontally and remains vertical, BO2And AO2The extension line of the angle-change angle-value-change angle-value-change angle.
Taking a tension point between the steel wire rope and the tension measuring module 3 as a stress analysis point, performing stress analysis on the steel wire rope pulled horizontally in the radial direction, as shown in fig. 12, F1 is horizontal tension, F2 is vertical upward steel wire rope tension, F3 is downward steel wire rope tension, and F2 is always orthogonal to F1, so that F2 is always unchanged in the tension process, and the following formula is obtained:
F2＝F3×Cosα (1)
F1＝F3×Sinα (2)
f1 ═ F2tan α (3) obtained from equations (1) and (2)
The tension of the steel wire ropes is uneven in the use process of the elevator, and the tension of some steel wire ropes is reduced and the tension of some steel wire ropes is increased. When the steel wire rope with the reduced tension is subjected to radial horizontal tension, the steel wire rope is easier to displace and is easier to be pulled to a set distance of 0.1m, and the steel wire rope with the increased tension is difficult to displace due to the radial horizontal tension. If the radial horizontal pulling distance of the steel wire rope is less than 0.1m in the tension measurement process, but the radial horizontal pulling force reaches 100N, in order to improve the convenience of the operation of the tensiometer, the steel wire rope is stopped from being pulled continuously, at the moment, the current tension angle variation alpha measured by the angle sensor 12 and the tension value F1 collected by the tension measurement module 3 (at the moment, F1 is a set value) are calculated by the formula (3) and the main control module 4 to obtain the size of F2.
Since the F2 value is unchanged, the change α ' of the wire rope opening angle when the wire rope is pulled to 0.1m is known from the trigonometric function relationship of fig. 11, and α ═ pi- γ ═ pi- β ', the relationship of the tension value F1 ' when the wire rope is pulled to 0.1m can be obtained,
f1 ' ═ tan β '. F1/tan α | tan γ '. F1/tan α |, where F1 is a set value, α is an amount of change in the opening angle of the wire rope due to deformation when the tension value reaches the set value, γ ' is a predetermined value, and F1 ' is a corresponding tension value when the bending angle is a predetermined value.
Therefore, through the conversion of the formula, the tension measurement under the condition that the tension of the steel wire rope is increased can be easily realized, and the accurate judgment on whether the steel wire rope is qualified or not is ensured.
In the pulling process, besides the angle sensor 11 detects the bending angle, the tension measuring module 3 can also measure the current tension, so that for the steel wire rope which is currently measured, the main control module 4 can receive the bending angle information and the tension value information in real time, and judge the size relation between the bending angle and the preset value and between the tension value and the set value in real time, and who reaches the comparison value (refers to the preset value or the set value) first, the tension value under the condition is recorded. In the present application, the tension measuring module 3 employs a cantilever load cell.
In order to timely ensure that the resistance value operator continuously pulls the current steel wire rope when the condition is met, the tensiometer system also comprises an audible and visual alarm module 6 which is connected with the main control module 4 and is triggered by the main control module 4 to perform audible and visual alarm to prompt the operator to stop continuously pulling when the tension value reaches a set value or the bending angle reaches a preset value. In the present application, the audible and visual alarm module 6 employs a buzzer. Since the buzzer circuit is a conventional circuit, it is not described here in detail.
After measuring one steel wire rope, an operator can measure the rest steel wire ropes one by one according to the same measuring mode so as to record the corresponding tension values of all the steel wire ropes. After that, the main control module 4 will determine all the recorded tension values, see whether there is data corresponding to the recorded tension values when the tension values are set values, if yes, the main control module will convert the recorded tension values one by using the above formula to obtain the corresponding tension values when the bending angles are set values, which is to ensure the uniformity of the reference comparison conditions.
After the determination operation is completed, the main control module 4 will respectively determine all tension values and threshold values when the bending angle is a predetermined value, so as to determine whether the corresponding steel wire rope is qualified, which results in a measurement method which will be described later.
It should be noted that, in order to facilitate the operator to know the tension value data and the judgment result accurately in time, the tensiometer system further comprises a display module 5 connected with the main control module 4 and capable of displaying the tension value and the judgment result in real time.
Meanwhile, in this embodiment, the main control module 4 also adopts a DSP chip, and please refer to fig. 3 for a specific circuit schematic diagram. The display module 5 adopts 2 cascaded 74HC595 driving chips as shown in fig. 7.
Because the full-scale output signal of the selected cantilever load cell is only 5mV, and the signal needs to be amplified in order to improve the conversion accuracy, the tensiometer system further comprises an HX711 type digital-to-analog conversion chip 7 which is arranged between the tension measuring module 3 and the main control module 4 and is used for amplifying the voltage signal output by the tension difference output by the tension measuring module 3, and a specific circuit schematic diagram is shown in fig. 6.
The application also claims a method for measuring the tension of a steel wire rope, and the specific flow chart is shown in fig. 9, the method comprises,
s1, judging whether the bending angle reaches a preset value or whether the tension value reaches a set value, if so, recording the current tension value, and if not, continuously judging the bending angle and the preset value and the tension value and the set value;
s2, judging whether the tension value is a set value in all the recorded current tension values, if so, executing S3, and if not, executing S4;
s3, converting the tension value with the set value into the tension value when the bending angle is the preset value, and executing S4;
s4, comparing all corresponding tension values with a threshold value one by one under the condition that the bending angle is a preset value, if the difference value between the tension value and the threshold value is in an error range, judging that the tension of the steel wire rope corresponding to the tension value is qualified, otherwise, judging that the steel wire rope is unqualified.
As can be seen from the foregoing description, all the tension values in step S4 include the tension value directly obtained when the bending angle reaches the reference value before the tension value in the easy-to-pull state of the wire rope, and also include the corresponding tension value when the bending angle reaches the reference value before the tension value reaches the reference value when the wire rope is not easy to pull, and the bending angle obtained after the formula conversion is the predetermined value. Wherein, the threshold value is obtained by summing and averaging the tension values under the condition that all bending angles are preset values, and the error range is +/-0.05.
Since the working principle of each module operating independently belongs to the common technical knowledge known to those skilled in the art, it is not elaborated here. According to the tension meter system, the characteristics that the tension meter needs to be pulled to the equal distance when measuring the tension, the deformation and bending angles of the corresponding steel wire ropes are equal when the tension meter is pulled to the equal distance, and the bending angles are easier to measure relative to the distance are utilized, so that the factors for ensuring the equal distances are ingeniously converted into the equal angles, the accuracy of the tension meter system measurement is improved, the angle measurement and the tension measurement are cooperatively matched, and meanwhile, the convenience, the accuracy, the convenience, the small size and the convenience in carrying of the tension meter system measurement are well realized by means of the lightness and the simplicity of electronic components; the steel wire rope with the increased tension is measured and converted through a conversion formula, and the problems of inconvenience and inaccuracy in measurement are solved.
While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A tensiometer system characterized by: the system comprises a plurality of devices which are connected with each other,
the angle measuring module (1) is used for measuring the size of a bending angle generated by deformation in the process of pulling the steel wire rope;
a slave control module (2) connected with the angle measuring module (1) to receive bending angle information;
a tension measuring module (3) for measuring the tension value of the steel wire rope in the pulling process;
the master control module (4) is respectively connected with the tension measuring module (3) and the slave control module (2) to receive the tension value and the bending angle information sent by the slave control module (2);
the main control module (4) is also used for judging the received tension value and the bending angle, recording the current tension value when the tension value reaches a set value or the bending angle reaches a preset value, converting the tension value reaching the set value into the tension value when the bending angle is the preset value, and comparing all the tension values when the bending angle is the preset value with a threshold value to judge the tension qualification of the corresponding steel wire rope.
2. Tensiometer system according to claim 1, characterized in that:
the angle measurement module (1) comprises a tool structure (11) which can be clamped on the steel wire rope and an angle sensor (12) which is arranged on the tool structure (11) and used for detecting the opening angle of the tool structure (11);
the tool structure (11) comprises an upper rotating rod mechanism (111) and a lower rotating rod mechanism (112), wherein the upper end part of the steel wire rope can extend into the upper rotating rod mechanism and can be sleeved with the lower end part of the steel wire rope;
the lower end of the upper rotating rod mechanism (111) is rotatably connected with the upper end of the lower rotating rod mechanism (112) so as to be pulled along with a steel wire rope positioned between the upper rotating rod mechanism and the lower rotating rod mechanism to rotate relatively, and the opening angle formed between the upper rotating rod mechanism and the lower rotating rod mechanism is equal to the bending angle generated by the deformation of the steel wire rope;
the angle sensor (12) is connected with the slave control module (2) and provides bending angle information by transmitting the detected opening angle information to the slave control module (2).
3. Tensiometer system according to claim 2, characterized in that: the conversion formula adopted for converting the tension value reaching the set value into the tension value under the condition that the bending angle is the preset value is as follows,
f1 '═ tan β'. F1/tan α | tan γ '. F1/tan α |, where F1 is a set value, α is an opening angle variation due to deformation of the wire rope when the tension value reaches the set value, γ' is a predetermined value, β 'is an opening angle of the tool structure measured by the angle measuring module when the bending angle is the predetermined value, and γ' ═ β ', F1' is a tension value corresponding to the bending angle being the predetermined value.
4. Tensiometer system according to claim 3, characterized in that:
the tensiometer system also comprises a display module (5) which is connected with the main control module (4) and can display the tension value and the judgment result in real time.
5. Tensiometer system according to claim 4, characterized in that:
the tensiometer system also comprises an audible and visual alarm module (6) which is connected with the main control module (4) and is triggered by the main control module (4) to perform audible and visual alarm to prompt an operator to stop pulling continuously when the tension value reaches a set value or the bending angle reaches a preset value.
6. Tensiometer system according to claim 5, characterized in that:
angle sensor (12) are AS5045 chip, main control module (4) are the DSP chip with from control module (2), audible-visual annunciator module (6) are bee calling organ, cantilever beam sensor is adopted in tension measurement module (3), display module (5) comprise 2 block cascade 74HC595 driver chip.
7. Tensiometer system according to claim 3, characterized in that:
the main control module (4) and the slave control module (2) are in wireless communication through an HC-12 wireless serial port transceiver module;
and an HX711 type digital-to-analog conversion chip (7) for amplifying voltage signals output by tension difference and output by the tension measuring module (3) is also arranged between the tension measuring module (3) and the main control module (4).
8. A method for measuring the tension of a steel wire rope is characterized by comprising the following steps: the method comprises the following steps of,
s1, judging whether the bending angle reaches a preset value or whether the tension value reaches a set value, if so, recording the current tension value, and if not, continuously judging the bending angle and the preset value and the tension value and the set value;
s2, judging whether the tension value is a set value in all the recorded tension values, if so, executing S3, and if not, executing S4;
s3, converting the tension value with the set value into the tension value when the bending angle is the preset value, and executing S4;
s4, comparing all corresponding tension values with a threshold value one by one under the condition that the bending angle is a preset value, if the difference value between the tension value and the threshold value is in an error range, judging that the tension of the steel wire rope corresponding to the tension value is qualified, otherwise, judging that the steel wire rope is unqualified.
9. The steel cord tension measuring method according to claim 8, characterized in that:
the threshold value is obtained by summing and averaging the tension values under the condition that all bending angles are preset values.
10. The steel cord tension measuring method according to claim 8, characterized in that:
the error range is ± 0.05.
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