CN111473023A - Intelligent monitoring system and positioning method for resonance of hydraulic cylinder - Google Patents
Intelligent monitoring system and positioning method for resonance of hydraulic cylinder Download PDFInfo
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- CN111473023A CN111473023A CN202010322285.6A CN202010322285A CN111473023A CN 111473023 A CN111473023 A CN 111473023A CN 202010322285 A CN202010322285 A CN 202010322285A CN 111473023 A CN111473023 A CN 111473023A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The application provides a pneumatic cylinder resonance intelligent monitoring system and positioning method, wherein, pneumatic cylinder resonance intelligent monitoring system includes: the system comprises a resonance measurement sensor array, a field bus and an upper computer virtual instrument; the resonance measurement sensor array is connected with an upper computer virtual instrument through a field bus; the resonance measurement sensor array comprises at least N resonance measurement sensors, and each resonance measurement sensor is correspondingly arranged on at least N hydraulic cylinder bodies respectively.
Description
Technical Field
The invention belongs to the field of detection, and particularly relates to an intelligent monitoring system for resonance of a hydraulic cylinder and a positioning method.
Background
As shown in fig. 1, a coordinated loading control system (control system for short) used in a structural strength test applies a load to a test structure through a hydraulic system, but in the actual loading process, a hydraulic cylinder in the hydraulic system realizes force control loading on a mechanical system of a test piece through servo control of the control system, and the hydraulic cylinder inevitably has a mechanical resonance problem in the servo control due to the existence of interferences such as friction torque, mechanical hysteresis, drive saturation and the like in the whole closed-loop system.
In the high-load stage, the mechanical resonance of the hydraulic cylinder provides great challenge for the safety of a test piece, a tester needs to pay close attention to each loading point in the stage-by-stage loading stage, and the parameters of the controller are changed or the output load of the hydraulic cylinder is changed at the instant when the resonance occurs, so that the hydraulic resonance is ensured not to be continuously dispersed and is converged to be stable within a certain time. However, due to the existence of objective factors such as experience of testing technicians, if the test control system cannot respond quickly in a short time, the test control system can unload emergently, which has a great potential safety hazard for the test.
Disclosure of Invention
The application provides a hydraulic cylinder resonance intelligent monitoring system and a positioning method, which are used for monitoring and positioning hydraulic resonance of a loading point in a large-scale structural strength test.
In a first aspect, the present application provides a hydraulic cylinder resonance intelligent monitoring system, the system includes: the system comprises a resonance measurement sensor array, a field bus and an upper computer virtual instrument; the resonance measurement sensor array is connected with an upper computer virtual instrument through a field bus; the resonance measurement sensor array comprises at least N resonance measurement sensors, and each resonance measurement sensor is correspondingly arranged on at least N hydraulic cylinder bodies respectively.
Optionally, the upper computer virtual instrument includes a display unit.
Optionally, the system further comprises an audible and visual alarm device, and the audible and visual alarm device is connected with the virtual instrument of the upper computer.
In a second aspect, the present application provides a method for resonant positioning of a hydraulic cylinder, the method comprising:
at least N resonance measurement sensors are respectively arranged on at least N hydraulic cylinder bodies, and the at least N resonance measurement sensors form a sensor array;
the sensor array collects resonance sound signals aiming at least N hydraulic cylinder bodies;
the sensor array transmits the resonance sound signal to an upper computer virtual instrument through field bus communication;
the upper computer virtual instrument carries out filtering processing on the resonance sound to obtain resonance frequency;
matching the resonant frequency with the frequency of a preset hydraulic cylinder resonant database;
and when the resonance frequency is consistent with the frequency in the hydraulic cylinder resonance database, judging that the hydraulic cylinder corresponding to the loading point generates resonance.
Optionally, the number of the resonance measurement sensor is consistent with that of the hydraulic cylinder,
optionally, when the hydraulic cylinder resonates, the method further includes:
the upper computer virtual instrument outputs a driving signal to drive the corresponding sound-light alarm device.
Optionally, when the hydraulic cylinder resonates, the method further includes:
and the upper computer virtual instrument acquires the serial number of the hydraulic cylinder with resonance and displays the serial number in real time through the display unit.
Optionally, when the hydraulic cylinder resonates, the method further includes:
and the upper computer virtual instrument determines the spatial position of the hydraulic cylinder loading point corresponding to the loading point and displays the spatial position in real time through the display unit.
In summary, the hydraulic cylinder resonance intelligent monitoring system and the positioning method provided by the application can rapidly assist the test technicians to rapidly position the resonance position and timely process the hydraulic cylinder of the resonance loading point, thereby ensuring the smooth proceeding of the structural strength test and achieving the purpose of reducing the test risk.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic cylinder;
fig. 2 is a schematic structural diagram of a hydraulic cylinder resonance intelligent monitoring system provided in the embodiment of the present application;
fig. 3 is a schematic view of a human-computer interaction interface of a virtual instrument according to an embodiment of the present disclosure.
Detailed Description
The application relates to a hydraulic cylinder resonance intelligent detection and positioning method, in particular to a resonance detection and positioning technology of a hydraulic cylinder in a structural strength test, which is particularly suitable for detection and positioning when the resonance of the hydraulic cylinder at a force control loading point in the structural strength test occurs.
The invention aims to provide an intelligent detection and positioning method for hydraulic cylinder resonance, which can meet the detection requirement on the occurrence of hydraulic cylinder resonance, can judge and position the position of the occurrence of resonance and the loading point number of the hydraulic cylinder with the occurrence of resonance, can display the position on a display interface after detection in real time, and is used for more accurately and efficiently completing the detection and positioning of a structural strength test, particularly the detection and positioning of the hydraulic cylinder in a high-load test when the resonance occurs.
a) System architecture block diagram
The hydraulic cylinder resonance detection and positioning system comprises three parts: the system comprises a sensor array, a field bus and an upper computer virtual instrument display part. The system structure of the intelligent detection is schematically shown in FIG. 2.
b) Basic principle of operation
The basic working principle of the intelligent detection and positioning system is as follows:
1. resonance measurement sensor arrangement method: each hydraulic cylinder body is independently provided with a resonance measurement sensor, and a sensor array is formed by a plurality of loading points;
2. resonance detection principle: the vibration sensor collects sound of the resonance biogenic source. After filtering, judging the resonance frequency, matching the analyzed frequency result with the frequency of a hydraulic cylinder resonance database, and when the resonance frequency is consistent with the database frequency, judging that the point generates resonance;
3. the positioning principle of the hydraulic cylinder is as follows: arranging the resonant measurement sensor to be consistent with the hydraulic cylinder number, and when the resonant hydraulic cylinder is detected, the upper computer calls the hydraulic cylinder number and the loading point number to be displayed on the virtual instrument in real time;
4. resonance alarm prompting principle: when the upper computer finds that the hydraulic cylinder corresponding to the loading point has resonance, the upper computer outputs a driving signal to drive the corresponding sound-light alarm device.
To sum up, the automatic detection capability of the hydraulic cylinder resonance intelligent monitoring system and the positioning method provided by the application replaces the former manual monitoring, the automatic positioning function greatly improves the hydraulic cylinder resonance detection efficiency, the system expansion function is open, the reliability is high, especially, the resonance point can be quickly positioned in a high-load test, and the risk of the structural strength test in high load is reduced.
The virtual instrument display interface is compiled by software, so that real-time display of resonance data can be realized, and meanwhile, the resonance data is compared with a resonance database in real time, and the position and the point number of the hydraulic cylinder when resonance occurs are quickly judged.
Example one
The embodiment of the application provides a specific hydraulic cylinder resonance intelligent monitoring system and method, comprising the following steps:
s101: arranging a resonance measurement sensor at each loading point hydraulic cylinder;
s102: the output result of the resonance measurement sensor is communicated and transmitted to an upper computer through a field bus;
s103: the upper computer filters the data acquired by the resonance measurement sensor, analyzes the resonance frequency and displays the data on a virtual instrument interface in real time;
s104: the upper computer transmits loading point data which are possibly subjected to resonance to a hydraulic cylinder resonance database for data matching through preliminary judgment, and further judges whether resonance occurs or not;
s105: when resonance occurs, the signal indicator lamp corresponding to the loading point is turned on and drives the alarm device; simultaneously determining the spatial position of the loading point and displaying the spatial position on a virtual instrument interface;
s106: and no resonance occurs, and the system normally runs to enter detection iteration.
In summary, the hydraulic cylinder resonance intelligent monitoring system and the positioning method provided by the application can rapidly assist the test technicians to rapidly position the resonance position and timely process the hydraulic cylinder of the resonance loading point, thereby ensuring the smooth proceeding of the structural strength test and achieving the purpose of reducing the test risk.
Claims (8)
1. An intelligent monitoring system for resonance of a hydraulic cylinder, the system comprising: the system comprises a resonance measurement sensor array, a field bus and an upper computer virtual instrument; the resonance measurement sensor array is connected with an upper computer virtual instrument through a field bus; the resonance measurement sensor array comprises at least N resonance measurement sensors, and each resonance measurement sensor is correspondingly arranged on at least N hydraulic cylinder bodies respectively.
2. The system of claim 1, wherein the host virtual instrument comprises a display unit.
3. The system according to claim 1, further comprising an audible and visual alarm device connected to the upper computer virtual instrument.
4. A hydraulic cylinder resonance positioning method is applied to the hydraulic cylinder resonance intelligent monitoring system according to claim 1, and comprises the following steps:
at least N resonance measurement sensors are respectively arranged on at least N hydraulic cylinder bodies, and the at least N resonance measurement sensors form a sensor array;
the sensor array collects resonance sound signals aiming at least N hydraulic cylinder bodies;
the sensor array transmits the resonance sound signal to an upper computer virtual instrument through field bus communication;
the upper computer virtual instrument carries out filtering processing on the resonance sound to obtain resonance frequency;
matching the resonance frequency with the frequency of a preset hydraulic cylinder resonance database;
and when the resonance frequency is consistent with the frequency in the hydraulic cylinder resonance database, judging that the hydraulic cylinder corresponding to the loading point generates resonance.
5. Method according to claim 4, characterized in that the resonance measuring sensor number is arranged to coincide with the cylinder number.
6. The method of claim 4, wherein when the hydraulic cylinder resonates, the method further comprises:
the upper computer virtual instrument outputs a driving signal to drive the corresponding sound-light alarm device.
7. The method of claim 4, wherein when the hydraulic cylinder resonates, the method further comprises:
and the upper computer virtual instrument acquires the serial number of the hydraulic cylinder with resonance and displays the serial number in real time through the display unit.
8. The method of claim 4, wherein when the hydraulic cylinder resonates, the method further comprises:
and the upper computer virtual instrument determines the spatial position of the hydraulic cylinder loading point corresponding to the loading point and displays the spatial position in real time through the display unit.
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| CN202010322285.6A CN111473023B (en) | 2020-04-22 | 2020-04-22 | Intelligent monitoring system and positioning method for resonance of hydraulic cylinder |
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| CN202010322285.6A CN111473023B (en) | 2020-04-22 | 2020-04-22 | Intelligent monitoring system and positioning method for resonance of hydraulic cylinder |
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