CN116878714A - Steel wire rope stress measuring device and real-time monitoring method for gate - Google Patents
Steel wire rope stress measuring device and real-time monitoring method for gate Download PDFInfo
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- CN116878714A CN116878714A CN202310794613.6A CN202310794613A CN116878714A CN 116878714 A CN116878714 A CN 116878714A CN 202310794613 A CN202310794613 A CN 202310794613A CN 116878714 A CN116878714 A CN 116878714A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000005259 measurement Methods 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000009662 stress testing Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005314 correlation function Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
Abstract
The utility model discloses a steel wire rope stress measuring device and a real-time monitoring method of a gate, wherein the device comprises a gearbox (2), a winch hoist (4) is arranged on the side of the gearbox (2), one end of the gearbox (2) is connected with a motor (1), the other end of the gearbox is provided with a transmission shaft (3), and the winch hoist (4) is connected with the gearbox (2) through the transmission shaft (3); the bottom end of the steel wire rope (16) is connected with the gate (10), the upper end of the steel wire rope (16) is connected with the winch hoist (4), the transmission shaft (3) is provided with the data acquisition module (7), and the steel wire rope stress measuring device and the real-time monitoring method of the gate can be used for installing the measuring device on the existing hoist, are high in stress testing precision and can reduce the damage of the gate.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering, and particularly relates to a steel wire rope stress measuring device and a real-time monitoring method of a gate.
Background
At present, a hoisting hoist generally adopts a load sensor method to monitor the tension of a steel wire rope. The load sensor is generally arranged under the bearing seat of the opening and closing machine, when the load sensor is damaged, the load sensor is troublesome to replace, the main equipment is required to be disassembled, the load sensor only measures the force perpendicular to the surface of the sensor, and when the direction of the force is changed, the measuring precision is greatly reduced.
The tension of the steel wire rope can be monitored through a torque measuring coupler, and the torque measuring coupler is arranged between an output shaft of the winch hoist and an input shaft of the gearbox, but the original structure of the hoist is required to be changed by adopting the method, so that the hoist is greatly changed and is difficult to install on the existing hoist.
When the existing gate is used, when the gate is stopped at a certain position, the steel wire rope bears the weight of the radial gate, the steel wire rope is always in a tensioning state, the front surface of the radial gate is impacted by water flow to generate vibration, and when the water flow excitation excites the resonance frequency of the gate, the gate is greatly damaged.
The utility model patent with the bulletin number of CN216712943U discloses a gate blocking automatic monitoring protection system in 2022, 6 months and 10 days, which comprises a steel rope, wherein a tension sensor is connected to the steel rope, an outgoing line is connected to the tension sensor, one end of the outgoing line is connected with an intelligent digital display instrument, two U-shaped bolts are arranged on one side of the tension sensor and are mutually matched with the steel rope, the U-shaped bolts can be used for conveniently fixing the tension sensor and the steel rope, a guide wheel is arranged on the tension sensor and is mutually matched with the steel rope, and the arrangement of the guide wheel can be used for conveniently transmitting the tension on the steel rope to the tension sensor. The automatic monitoring and protecting system for the gate blocking cannot be installed on an existing hoist, cannot improve stress testing precision, and cannot reduce damage of the gate.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a steel wire rope stress measuring device and a real-time monitoring method for a gate, wherein the steel wire rope stress measuring device can be installed on the existing hoist, has high stress testing precision and can reduce the damage of the gate.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the steel wire rope stress measuring device of the gate comprises a gearbox, wherein a winch type headstock gear is arranged on the side of the gearbox, one end of the gearbox is connected with a motor, the other end of the gearbox is provided with a transmission shaft, and the winch type headstock gear is connected with the gearbox through the transmission shaft; the bottom end of the steel wire rope is connected with the gate, the upper end of the steel wire rope is connected with the winch hoist, and the transmission shaft is provided with a data acquisition module.
The data acquisition module comprises a torque strain gauge, and a temperature sensor is arranged on one side of the torque strain gauge; and the transmission shaft is also provided with a collecting ring, and the collecting ring is connected with a data acquisition module.
An on-site control box is arranged below the transmission shaft and comprises a router, and the router is arranged below the torque strain gauge.
Carbon brushes are connected to the bottom ends of the collecting rings and connected with a power supply.
And the top end of the gate is provided with a hanging beam, and the bottom end of the steel wire rope is connected to the hanging beam.
The winch type headstock gear is arranged on two sides of the gearbox in pairs.
The method for monitoring the stress of the steel wire rope of the gate in real time is realized by using a steel wire rope stress measuring device of the gate and comprises the following steps:
1) Acquiring a temperature curve and a stress acquisition error curve of a data acquisition module to obtain original data;
2) A data acquisition module and a temperature sensor are arranged on the transmission shaft, the hoist is kept in an installation state for 72 hours, temperature and stress data are acquired, and a zero point Wen Piao of the torque strain gauge is calculated;
3) Correcting stress measurement errors caused by temperature change according to the zero temperature drift and the temperature curve;
4) The upper computer calculates the zero temperature drift periodically so as to correct stress measurement data with more data;
5) The upper computer stores the original data and the zero temperature drift data acquired by the stress module in different tables in the database respectively;
6) When the zero temperature drift data is changed, the historical data is checked, the system directly calls out the original data and the zero temperature drift data respectively and compares the original data with the zero temperature drift data, and the comparison result is presented to the user.
The measuring method of the stress acquisition error curve comprises the following steps:
calibrating the temperature acquired by the data acquisition module;
placing the data acquisition module in a temperature box, placing a standard stress simulator in a room temperature environment, and connecting the data acquisition module and the standard stress simulator;
the temperature of the temperature box is changed, and errors of stress data acquired by the data acquisition module at different temperatures are recorded.
The method for measuring the zero temperature drift comprises the following steps:
when the winch hoist is in a stable working state, performing low-pass filtering treatment on stress data;
and (3) fitting a temperature and stress relation curve through a least square method, eliminating a special value and a salient value in stress data, and calculating the zero temperature drift of the torque strain gauge.
The method for periodically calculating the zero temperature drift comprises the following steps:
when the accumulated stable working time of the winch hoist exceeds 100 hours, fitting temperature and stress data through a least square method to obtain a newly fitted temperature and stress relation curve;
and (3) fitting the newly fitted temperature and stress relation curve and the previously fitted temperature and stress relation curve again by a least square method to generate a new fitted curve, eliminating special values and prominent values in stress data, and calculating the zero temperature drift of the torque strain gauge.
The utility model has the technical effects that: by adopting the steel wire rope stress measuring device and the real-time monitoring method of the gate, the real-time monitoring of the steel wire rope stress of the gate of the hoist by measuring the stress change of the transmission shaft solves the problem that the outdoor torque strain gauge cannot perform a temperature test on site by utilizing the temperature sensor and the torque strain gauge. The zero drift problem of sensor temperature drift is solved through the on-site natural temperature change and stress change of the stress torque strain gauge, zero drift caused by temperature is corrected through an algorithm, and stress test accuracy is improved.
According to the real-time monitoring method for the stress of the steel wire rope, the stress of the steel wire rope is monitored in real time, the situation of the tensile force applied to the steel wire rope can be calculated by data collected on the torque strain gauge attached to the transmission shaft, and an operator can judge the opening degree of the gate according to the calculation result of the system, so that the resonance frequency of the gate is prevented from being excited by water flow, the damage of the gate is reduced, and the service life of the gate is prolonged.
The measuring device can be directly installed on the existing hoist without disassembling the hoist, and is convenient to maintain and high in measuring accuracy.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic diagram of a wire rope stress measuring device and a real-time monitoring method of a gate of the present utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a cross-sectional view of a hoist of the wire rope stress measuring device and the real-time monitoring method of the gate of the present utility model;
FIG. 4 is a schematic working diagram of the device for measuring the stress of the steel wire rope of the gate and the real-time monitoring method of the utility model;
FIG. 5 is a schematic diagram of an in-situ control box of the wire rope stress measurement device and the real-time monitoring method of the gate of the present utility model;
fig. 6 is a schematic structural view of a slip ring of the wire rope stress measuring device and the real-time monitoring method of the gate of the present utility model.
Marked in the figure as: 1. a motor; 2. a gearbox; 3. a transmission shaft; 4. a winch hoist; 5. a collecting ring; 6. a capacitance module; 7. a data acquisition module; 8. torque strain gage; 9. a receiving shaft; 10. a gate; 11. a carbon brush; 12. an industrial personal computer; 13. a router; 14. a power module; 15. a reel; 16. a wire rope; 17. and a hanging beam.
Detailed Description
The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid those skilled in the art in a more complete, accurate and thorough understanding of the inventive concepts and aspects of the utility model, and to facilitate their practice.
As shown in fig. 1 to 6, the steel wire rope stress measuring device of the gate comprises a gearbox 2, wherein a winch hoist 4 is arranged on the side of the gearbox 2, one end of the gearbox 2 is connected with a motor 1, the other end of the gearbox 2 is provided with a transmission shaft 3, and the winch hoist 4 is connected with the gearbox 2 through the transmission shaft 3; the bottom end of the steel wire rope 16 is connected with the gate 10, the upper end of the steel wire rope 16 is connected with the winch hoist 4, and the transmission shaft 3 is provided with a data acquisition module 7.
In order to avoid the damage of the gate 10 and achieve the purpose of being convenient for installation on the equipment which is put into operation, the following technical scheme is adopted: a torque strain gauge 8 is stuck on the transmission shaft 3 of the gearbox 2, and two data acquisition modules 7 are respectively fixed on the transmission shaft 3. The torque strain gage 8 can measure the tension of the steel wire rope 16 by measuring the shearing stress of the transmission shaft 3 of the hoist 4.
As shown in fig. 1 and 2, the data acquisition module 7 comprises a torque strain gauge 8, and a temperature sensor is arranged on one side of the torque strain gauge 8; and the transmission shaft 3 is also provided with a collecting ring 5, and the collecting ring 5 is connected with a data acquisition module 7.
Because the hoist works outdoors, the environmental temperature change range is large. The temperature will have a large effect on the output of the torque strain gauge 8. In order to improve the measurement accuracy, the influence of temperature on the measurement result needs to be compensated. A temperature sensor is arranged near the torque strain gauge 8, and the ambient temperature of the torque strain gauge 8 is transmitted to an upper computer.
The torque strain gauge 8 adopts a full-bridge assembly mode, and after the bonding mode is adopted, the influence of temperature on a measurement result is mainly zero temperature drift of the strain gauge and temperature drift of an acquisition instrument, so that the influence of temperature on the torque strain can be reduced.
Wherein the torque strain gage 8 and the data acquisition module 7 may be affixed to the generator output shaft or other power transmission shaft between the generator and the take-up reel.
The collecting ring 5 is arranged, the power distribution capacity module 6 supplies power to the data acquisition module 7, the collecting ring 5 is powered by the carbon brush 11, and the problem of power supply of the data acquisition module 7 is solved through the assembled collecting ring 5.
A local control box is arranged below the transmission shaft 3, the local control box comprises a router 13, and the router 13 is arranged below the torque strain gauge 8.
The data acquisition module 7 can wirelessly transmit torque signals through the router 13, so that the problem of stress data transmission of the rotating shaft is solved.
As shown in fig. 2 and 6, the bottom end of the collecting ring 5 is connected with a carbon brush 11, and the carbon brush 11 is connected with a power supply. The carbon brush 11 supplies power to the collecting ring 5, and the power module 14 of the local control box simultaneously supplies power to the carbon brush 11, the industrial personal computer 12 and the router 13.
As shown in fig. 4, the top end of the gate 10 is provided with a hanging beam 17, and the bottom end of the wire rope 16 is connected to the hanging beam 17. The hanging beam 17 is used as a balance sling for lifting and falling the gate 10, and the arrangement of the hanging beam 17 can improve the stability of the lifting gate 10 controlled by the steel wire rope 16.
As shown in fig. 1, hoist winches 4 are provided in pairs on both sides of the transmission case 2. The gate 10 can be provided with a plurality of steel wire ropes 16 to realize lifting, and the stability of the lifting process of the gate 10 can be improved
The method for monitoring the stress of the steel wire rope of the gate in real time is realized by using a steel wire rope stress measuring device of the gate and comprises the following steps:
1) Acquiring a temperature curve and a stress acquisition error curve of the data acquisition module 7 to obtain original data;
2) A data acquisition module 7 and a temperature sensor are arranged on the transmission shaft 3, the hoist is kept in an installation state for 72 hours, temperature and stress data are acquired, and a zero point Wen Piao of the torque strain gauge 8 is calculated;
3) Correcting stress measurement errors caused by temperature change according to the zero temperature drift and the temperature curve;
4) The upper computer calculates the zero temperature drift periodically so as to correct stress measurement data with more data;
5) The upper computer stores the original data and the zero temperature drift data acquired by the stress module in different tables in the database respectively;
6) When the zero temperature drift data is changed, the historical data is checked, the system directly calls out the original data and the zero temperature drift data respectively and compares the original data with the zero temperature drift data, and the comparison result is presented to the user.
The measuring method of the stress acquisition error curve comprises the following steps:
calibrating the temperature acquired by the data acquisition module 7;
placing the data acquisition module 7 in a temperature box, placing a standard stress simulator in a room temperature environment, and connecting the data acquisition module 7 with the standard stress simulator;
the temperature of the temperature box is changed, and errors of stress data acquired by the data acquisition module 7 at different temperatures are recorded.
The zero temperature drift measuring method comprises the following steps:
when the winch hoist 4 is in a stable working state, performing low-pass filtering treatment on stress data;
and (5) fitting a temperature and stress relation curve by a least square method, eliminating a special value and a salient value in stress data, and calculating the zero temperature drift of the torque strain gauge 8.
The method for periodically calculating the zero temperature drift comprises the following steps:
when the accumulated stable working time of the winch hoist 4 exceeds 100 hours, fitting temperature and stress data by a least square method to obtain a newly fitted temperature and stress relation curve;
and (3) fitting the newly fitted temperature and stress relation curve and the previously fitted temperature and stress relation curve again by a least square method to generate a new fitted curve, eliminating special values and prominent values in stress data, and calculating the zero temperature drift of the torque strain gauge 8.
The calculation principle of zero temperature drift is as follows:
since the stress acquisition device acquires the same stress at different temperatures, the acquired data is different.
Before the data acquisition module 7 is mounted to the hoist, a temperature test is performed on the data acquisition module 7 in a laboratory. And (3) calibrating the temperature of the data acquired by the data acquisition module 7, placing the data acquisition module 7 into a temperature box, placing a standard stress simulator in a room temperature environment, testing errors of the acquired stress data when the data acquisition module 7 acquires the same stress at different temperatures, and further obtaining a temperature curve and a stress acquisition error curve of the data acquisition module 7.
Because the headstock gear is installed outdoors, after the moment of torsion strain gauge 8 installs, can't carry out the zero drift under the different temperatures with the temperature test box and carry out the temperature test. Therefore, a temperature sensor needs to be installed near the torque strain gauge 8 to detect the ambient temperature where the torque strain gauge 8 is located.
In the working process of the hoist, the working states of the hoist are steady states except the hoist lifting process, namely the hoist torque measurement result floats, and the temperature correlation is extremely strong. When the hoist is stable, the tension of the steel wire rope 16 is relatively stable, but is also influenced by river water waves, and the tension of the steel wire rope 16 floats to a certain extent, so that the time region of stable operation of the hoist is selected for calculation.
After the torque strain gauge 8 is stuck, the hoist is kept in an installed state for 72 hours. The system collects temperature and stress data, obtains a zero point Wen Piao through an empirical formula according to a large amount of temperature and stress data,
before calculating the zero temperature drift, the influence of stress floating caused by the tension change of the steel wire rope 16 needs to be removed.
The stress curve is first low pass filtered to eliminate stress fluctuations in the tension of the wire rope 16, and then a correlation function is used to calculate the correlation between temperature and stress.
Wherein the low pass filtering is of a kindFiltrationBy means of the method, the low-frequency signals can normally pass through the device, and the high-frequency signals exceeding a set critical value can be blocked and weakened.
And fitting a temperature and stress relation curve by using a least square method, and eliminating the special value and the prominent value in the stress data by using the least square method, so that the influence of the temperature on the stress acquisition error is eliminated, and the stress measurement data is corrected.
When the zero point Wen Piao is changed due to external environmental factors, an operator checks the historical data, the system directly calls out the original data and the zero point temperature drift data respectively and compares the data, and the comparison result is presented to the industrial personal computer 12.
Since the torque can directly reflect the tension of the wire rope 16, the tension of the wire rope 16 can be monitored by measuring the torque. The operator can judge the stress condition of the steel wire rope 16 according to the comparison result of the data and the corrected stress measurement data, and the vibration of the radial gate 10 can be monitored in response to the pulling force of the steel wire rope 16, so as to avoid the resonance frequency of the gate 10 caused by water flow excitation, and the opening degree of the gate 10 can be adjusted to avoid the resonance area.
The system corrects the stress measurement data by periodically fitting a temperature and stress relation curve and combining zero temperature drift according to the method: in the time zone of the work stability of the on-off machine, when the accumulated stable working condition time exceeds 100 hours, the temperature and stress data are processed regularly according to the method. And (3) generating a new fitted curve again according to a least square method to correct the stress measurement data by combining the new fitted curve with the previously fitted curve.
As shown in fig. 1, a motor 1 controls a gearbox 2 to regulate rotation of two transmission shafts 3, and then drives a steel wire rope 16 in a winch hoist 4 to control lifting of a gate 10. When the gate 10 is stopped at a certain position, the steel wire rope 16 bears the weight of the radial gate 10, and the steel wire rope 16 is always in a tension state. The front of the radial gate 10 is impacted by the water flow to generate vibration, and the vibration of the radial gate 10 can react to the tensile force of the steel wire rope 16 to a certain extent. Vibration of radial gate 10 can be monitored by the tension of wire rope 16, and when the water flow excitation excites the resonant frequency of gate 10, there is significant damage to gate 10, with the resonant frequency of gate 10 typically being within 40 Hz.
As shown in fig. 3 and 4, the hoist 4 controls the raising and lowering of the gate 10 by pulling the wire rope 16 and the hanging beam 17 through the drum 15, and it is necessary to adjust the opening degree of the gate 10 so as to avoid the resonance region. By monitoring the stress of the steel wire rope 16 in real time in the above steps, the condition of the tensile force of the steel wire rope 16 can be calculated by the data collected on the torque strain gauge 8 stuck on the transmission shaft 3 and the corrected stress measurement data, and an operator can judge the opening degree of the gate 10 according to the system calculation result.
As shown in fig. 5 and 6, the local control box mainly comprises an industrial personal computer 12, a router 13 and a power module 14. The power module 14 of the local control box supplies power to the collecting ring 5 through the carbon brush 11, simultaneously supplies power to the industrial personal computer 12 and the router 13, the receiving shaft 9 of the router 13 receives signals of the strain acquisition device, the industrial personal computer 12 analyzes and processes the signals, and the sampling rate of the system is 80Hz or more.
The method for measuring the tension of the steel wire rope 16 of the hoist 4 by torsional stress measurement comprises the following steps: the torsion stress is measured by adopting a mode of pasting a torque strain gauge 8 by a full bridge on site, and simultaneously placing a temperature sensor beside the torque strain gauge 8 to measure the ambient temperature. And the upper computer calculates the zero temperature drift of the torque strain gage 8 according to the temperature and strain measurement data, the working state of the headstock gear and the temperature curve of the acquisition module. And correcting stress measurement errors caused by temperature changes according to the calculated zero temperature drift and temperature curve. The upper computer calculates the zero temperature drift periodically so as to correct calculation errors by more data. The upper computer stores stress data in a specific data structure so as to adapt to the updating of the zero temperature drift coefficient and apply the updating to the historical data rapidly.
The method for calculating the zero temperature drift of the torque strain gauge 8 by the upper computer comprises the following steps: firstly, the working state of the hoist is judged to be a stable working state. And performing low-pass filtering treatment on stress data in a stable working state of the upper computer, performing a cross-correlation function of temperature and stress, calculating a correlation curve of temperature and stress acquisition data, and then discarding the influence of the temperature on acquisition errors of the data acquisition module 7, so as to calculate zero temperature drift of the torque strain gauge 8.
The data structure of the upper computer for storing stress data by a specific structure is as follows: the original data collected by the data collection module 7 is independently stored in one table of the database, and the zero point Wen Piao is independently stored in another table. When the zero temperature drift is changed and the historical data is checked, the system directly calls out the original data and the zero temperature drift data respectively, calculates and displays the calculation result on the user interface.
According to the device and the method for measuring the stress of the steel wire rope of the gate and the method for monitoring the stress in real time, the stress of the steel wire rope 16 of the gate 10 of the winch hoist 4 is monitored in real time by measuring the stress change of the transmission shaft 3, and the problem that an outdoor torque strain gauge 8 cannot perform a temperature test on site is solved by utilizing the temperature sensor and the torque strain gauge 8. The zero drift problem of sensor temperature drift is solved through the on-site natural temperature change and the stress change of the torque strain gauge 8, zero drift caused by temperature is corrected through an algorithm, and the stress test precision is improved.
The real-time monitoring method monitors the stress of the steel wire rope in real time, data collected on the torque strain gauge 8 stuck on the transmission shaft 3 can calculate the condition of the tensile force born by the steel wire rope 16, and operators can judge the opening degree of the gate 10 according to the calculation result of the system, so that the resonance frequency of the gate 10 is prevented from being excited by water flow, the damage of the gate 10 is reduced, and the service life of the gate 10 is prolonged.
The measuring device can be directly installed on the existing hoist without disassembling the hoist, and is convenient to maintain and high in measuring accuracy.
The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.
Claims (10)
1. The utility model provides a wire rope stress measurement device of gate which characterized in that: the automatic transmission device comprises a gearbox (2), wherein a winch hoist (4) is arranged on the side of the gearbox (2), one end of the gearbox (2) is connected with a motor (1), the other end of the gearbox is provided with a transmission shaft (3), and the winch hoist (4) is connected with the gearbox (2) through the transmission shaft (3); the bottom end of the steel wire rope (16) is connected with the gate (10), the upper end of the steel wire rope (16) is connected with the winch hoist (4), and the transmission shaft (3) is provided with a data acquisition module (7).
2. The wire rope stress measuring device of a gate according to claim 1, wherein: the data acquisition module (7) comprises a torque strain gauge (8), and a temperature sensor is arranged on one side of the torque strain gauge (8); and the transmission shaft (3) is also provided with a collecting ring (5), and the collecting ring (5) is connected with a data acquisition module (7).
3. The wire rope stress measuring device of a gate according to claim 2, wherein: an on-site control box is arranged below the transmission shaft (3), the on-site control box comprises a router (13), and the router (13) is arranged below the torque strain gauge (8).
4. A wire rope stress measuring device for a gate according to claim 3, wherein: carbon brushes (11) are connected to the bottom ends of the collecting rings (5), and the carbon brushes (11) are connected with a power supply.
5. The wire rope stress measuring device of a gate according to claim 4, wherein: the top end of the gate (10) is provided with a hanging beam (17), and the bottom end of the steel wire rope (16) is connected to the hanging beam (17).
6. The wire rope stress measuring device of a gate according to claim 5, wherein: the winch type opening and closing machines (4) are arranged on two sides of the gearbox (2) in pairs.
7. A method for monitoring the stress of a steel wire rope of a gate in real time, which is realized by using the steel wire rope stress measuring device of the gate according to any one of claims 2 to 6, and is characterized by comprising the following steps:
1) Acquiring a temperature curve and a stress acquisition error curve of a data acquisition module (7) to obtain original data;
2) A data acquisition module (7) and a temperature sensor are arranged on the transmission shaft (3), the hoist is kept in an installation state for 72 hours, temperature and stress data are acquired, and a zero point Wen Piao of the torque strain gauge (8) is calculated;
3) Correcting stress measurement errors caused by temperature change according to the zero temperature drift and the temperature curve;
4) The upper computer calculates the zero temperature drift periodically so as to correct stress measurement data with more data;
5) The upper computer stores the original data and the zero temperature drift data acquired by the stress module in different tables in the database respectively;
6) When the zero temperature drift data is changed, the historical data is checked, the system directly calls out the original data and the zero temperature drift data respectively and compares the original data with the zero temperature drift data, and the comparison result is presented to the user.
8. The method for monitoring the stress of the steel wire rope of the gate in real time according to claim 7, wherein the measuring method of the stress acquisition error curve comprises the following steps:
calibrating the temperature acquired by the data acquisition module (7);
placing the data acquisition module (7) in a temperature box, placing a standard stress simulator in a room temperature environment, and connecting the data acquisition module (7) with the standard stress simulator;
the temperature of the temperature box is changed, and errors of stress data acquired by the data acquisition module (7) at different temperatures are recorded.
9. The method for monitoring the stress of the steel wire rope of the gate in real time according to claim 7, wherein the method for measuring the zero temperature drift comprises the following steps:
when the winch hoist (4) is in a stable working state, performing low-pass filtering treatment on the stress data;
and (3) fitting a temperature and stress relation curve through a least square method, eliminating a special value and a salient value in stress data, and calculating the zero temperature drift of the torque strain gauge (8).
10. The method for monitoring the stress of the steel wire rope of the gate in real time according to claim 7, wherein the method for periodically calculating the zero temperature drift comprises the following steps:
when the accumulated stable working time of the winch hoist (4) exceeds 100 hours, fitting temperature and stress data by a least square method to obtain a newly fitted temperature and stress relation curve;
and (3) fitting the newly fitted temperature and stress relation curve and the previously fitted temperature and stress relation curve again by a least square method to generate a new fitted curve, eliminating special values and prominent values in stress data, and calculating zero temperature drift of the torque strain gauge (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310794613.6A CN116878714A (en) | 2023-06-30 | 2023-06-30 | Steel wire rope stress measuring device and real-time monitoring method for gate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310794613.6A CN116878714A (en) | 2023-06-30 | 2023-06-30 | Steel wire rope stress measuring device and real-time monitoring method for gate |
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| CN116878714A true CN116878714A (en) | 2023-10-13 |
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| CN202310794613.6A Pending CN116878714A (en) | 2023-06-30 | 2023-06-30 | Steel wire rope stress measuring device and real-time monitoring method for gate |
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| CN (1) | CN116878714A (en) |
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