CN112595454B - Dynamic and static force calibration system of horizontal fatigue testing machine - Google Patents
Dynamic and static force calibration system of horizontal fatigue testing machine Download PDFInfo
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- CN112595454B CN112595454B CN202011576794.8A CN202011576794A CN112595454B CN 112595454 B CN112595454 B CN 112595454B CN 202011576794 A CN202011576794 A CN 202011576794A CN 112595454 B CN112595454 B CN 112595454B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a standard dynamometer for a fatigue testing machine and a dynamic force calibration system, wherein the system comprises a standard dynamometer for testing dynamic and static transverse force data of the fatigue testing machine, a dynamic data acquisition device for acquiring dynamic and static transverse forces acquired by the standard dynamometer and analyzing the dynamic and static transverse forces, and an upper computer for acquiring data processed by the dynamic data acquisition device and storing and displaying the data according to a preset mode; the standard load cell was mounted on a fatigue tester to be verified. The invention measures the dynamic and static transverse forces by additionally arranging the standard dynamometer which comprises the sensor for measuring the dynamic and static transverse forces of the fatigue testing machine, and the dynamic data acquisition device calculates and analyzes the acquired data and displays the data on the upper computer, thereby solving the defect that the conventional fatigue testing machine cannot measure the transverse forces. The standard dynamometer is installed for a fatigue testing machine, the test can be carried out without manpower, the operation is simple and easy, and the automation degree is high.
Description
Technical Field
The invention relates to the technical field of dynamic and static force testing, in particular to a standard dynamometer for a fatigue testing machine and a dynamic force calibration system.
Background
The dynamic and static force of the horizontal fatigue testing machine is an important index in a design and sizing stage, reflects the precision of dynamic and static force value parameters of the horizontal fatigue testing machine, and has very important guiding significance for designing, researching and developing the horizontal fatigue testing machine. However, no horizontal fatigue dynamic force calibration method exists at present, and the transverse dynamic force of the horizontal fatigue dynamic force calibration method cannot be calibrated by using a conventional dynamic force calibration technology. The traditional dynamic test method of the fatigue testing machine is mainly a vertical tension and compression method, and the test method has the limitations of horizontal and load sensors and cannot calibrate the dynamic force of horizontal operation.
Disclosure of Invention
In order to solve the technical problem that the dynamic force running transversely cannot be calibrated in the prior art, the embodiment of the invention provides a standard dynamometer and a dynamic and static force calibration system for a fatigue testing machine. In order to measure the stable dynamic force, back-tightening nuts are required to be arranged on the threads at the two ends of the sensor so as to accurately record the reciprocating dynamic force at the zero crossing point. The dynamic force is the peak value and peak-valley value display value of the cyclic force, the dynamic force error, the peak value and peak-valley value are averaged for 10 times, and the peak value and peak-valley value error is calculated.
The specific technical scheme is as follows:
in a first aspect, there is provided a standard load cell for a fatigue testing machine, comprising; the device comprises a transverse force sensor and two special convertible tools; one end of the transverse force sensor is fixedly connected with a transverse moving shaft of the fatigue testing machine through a first special convertible tool, and the other end of the transverse force sensor is connected with a load sensor of the fatigue testing machine through a second special convertible tool and fixed on a fixed shaft of the fatigue testing machine; the transverse force sensor and the first special convertible tool are fixed on a station through a transverse moving shaft; the transverse force sensor is used for detecting dynamic and static transverse forces of the fatigue testing machine.
Further, the transverse force sensor is connected with the special convertible tool through threads.
Furthermore, a back nut is sleeved on each of the first convertible special tool and the second convertible special tool, a locking device is arranged in a matched mode, and a transverse force sensor connected with the first convertible special tool and the second convertible special tool is stably fixed on the transverse moving shaft and the fixing shaft.
A second aspect provides a dynamic force calibration system for a horizontal fatigue testing machine, which comprises any one of the standard dynamometers, a dynamic data acquisition device for acquiring dynamic and static transverse forces acquired by the standard dynamometers and analyzing the dynamic and static transverse forces, and an upper computer for acquiring data processed by the dynamic data acquisition device, storing and displaying the data according to a preset mode; the standard load cell is mounted on a fatigue testing machine to be verified.
Furthermore, two ends of the standard dynamometer are respectively fixed on a transverse moving shaft of the fatigue testing machine at one end and a fixing shaft of the fatigue testing machine at the other end through a sleeved special convertible tool and a correspondingly configured locking device.
Furthermore, the dynamic data acquisition device comprises a dynamic signal analysis module, a dynamic module and a static module; the dynamic module is used for acquiring and storing dynamic transverse force, and the static module is used for acquiring and storing static transverse force; and the dynamic signal analysis module is used for analyzing and calculating the dynamic transverse force acquired by the dynamic module according to a preset analysis method.
Further, the upper computer is used for recording the peak value and the peak valley value of the waveform of the fatigue testing machine under the given condition; wherein the given condition includes: dynamic and static forces are given, different frequencies are given, different average test force dynamic forces and different dynamic forces are given.
Furthermore, a transverse force sensor of the standard dynamometer is connected with the dynamic data acquisition device through a special sensor line, and the dynamic data acquisition device is connected with the upper computer through a special signal transmission line.
Furthermore, the special signal transmission line comprises an RS232 bus, an RS485 bus and a CAN bus.
(3) Advantageous effects
In summary, the standard dynamometer and the dynamic force calibration system for the fatigue testing machine provided by the invention comprise a standard dynamometer for testing dynamic and static transverse force data of the fatigue testing machine, a dynamic data acquisition device for acquiring the dynamic and static transverse force acquired by the standard dynamometer and analyzing the dynamic and static transverse force, and an upper computer for acquiring data processed by the dynamic data acquisition device and storing and displaying the data according to a preset mode; the standard load cell was mounted on a fatigue tester to be verified. The invention measures the dynamic and static transverse forces by additionally arranging the standard dynamometer which comprises the sensor for measuring the dynamic and static transverse forces of the fatigue testing machine, and the dynamic data acquisition device calculates and analyzes the acquired data and finally displays the data on the upper computer, thereby solving the defect that the conventional fatigue testing machine cannot measure the transverse forces. The standard dynamometer is installed for a fatigue testing machine, the test can be carried out without manpower, the operation is simple and easy, and the automation degree is higher.
Furthermore, the invention connects the transverse dynamic and static force sensor by adding a special convertible tool to the corresponding positions of the moving shaft of the horizontal fatigue testing machine and the load sensor. In order to measure the stable dynamic force, back-tightening nuts are arranged on the threads at the two ends of the sensor, and a locking device is used for accurately recording the reciprocating dynamic force at the zero crossing point. The dynamic force is the peak value and peak-valley value display value of the circulating force, the dynamic force error, the peak value and peak-valley value are calculated by averaging 10 times of peak values and peak-valley values, and the peak value and peak-valley value error is calculated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an overall structure of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a convertible special tool of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the present invention.
In the figure: 1-a transverse moving shaft, 2-a locking device, 31-a first convertible special tool, 32-a second convertible special tool, 4-a transverse force sensor, 5-a locking device, 6-a fixed shaft, 7-a tester load sensor, 8-a back-tightening nut, 9-a dynamic data acquisition device, 10-an upper computer and 11-a station.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic diagram of an overall structure of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the present invention, the system includes a standard dynamometer for measuring dynamic and static lateral forces of the fatigue testing machine, a dynamic data acquisition device for analyzing the dynamic and static lateral forces, and an upper computer for acquiring data processed by the dynamic data acquisition device, storing and displaying the data according to a preset mode; the standard load cell is mounted on a fatigue testing machine to be verified.
The standard dynamometer consists of a transverse force special sensor and a convertible special tool, one end of the standard dynamometer is fastened on a transverse moving shaft of the horizontal fatigue testing machine by a back nut, and the other end of the standard dynamometer is also connected with the special tool and fixedly connected with a load sensor of the testing machine on a testing frame. When the horizontal fatigue testing machine applies a dynamic force value through the force application mechanism, the standard dynamometer transmits a dynamic signal fed back in real time to the dynamic data acquisition system, a dynamic module in the dynamic data acquisition system feeds back acquired waveforms to analysis software in real time, and the accuracy of the dynamic force value is judged by calculating the peak value and the valley value of the waveforms. The upper computer is used for displaying the measured dynamic signal waveform and comprises corresponding upper computer software for setting functions of static force and dynamic force acquisition, sampling frequency, filtering form, dynamic signal analysis and the like.
The actual calibration of the invention is completed on a station 11, and fig. 2 is a schematic diagram of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the invention, before the actual calibration, one end of the transverse force sensor 4 is fixedly connected with a transverse moving shaft 1 of the fatigue testing machine through a first convertible special tool 31, and the other end of the transverse force sensor 4 is connected with a load sensor 7 of the fatigue testing machine through a second convertible special tool 32 and is fixed on a fixed shaft 6 of the fatigue testing machine; the transverse force sensor 4 and the first special convertible tool 31 are fixed on a station through a transverse moving shaft 1; the transverse force sensor is used for detecting dynamic and static transverse forces of the fatigue testing machine. The transverse force sensor 4 is connected with the special convertible tool 3 through threads. After the connection is finished, the transverse force special sensor 4 is connected with the dynamic data acquisition system 9 through a special sensor line, and then the dynamic data acquisition system 9 is connected with the upper computer 10 through a special signal transmission line to carry out testing.
And by adopting the multi-series threaded tool joint, the combination with equipment is good, and the expandability is strong. The tool is provided with the threaded through hole so as to be convenient for connecting the horizontal moving shaft and the fixed shaft connecting end of the horizontal fatigue testing machine by using the back nut, the influence of the dead weight of the standard dynamometer on the dynamic and static force values is eliminated by the connecting mode, the coaxiality of the upper and lower shafts of the calibrating device is also ensured to a certain extent, and meanwhile, the tool also has good rigidity and reliability so that the measured data is more true and accurate.
The first convertible special tool and the second convertible special tool are the same tool, and a schematic structural diagram of the tool is shown in fig. 3, and fig. 3 is a schematic diagram of a convertible special tool of a dynamic force calibration system for a fatigue testing machine according to an embodiment of the present invention.
In the embodiment of the invention, the dynamic data acquisition device comprises a dynamic signal analysis module, a dynamic module and a static module; the dynamic module is used for acquiring and storing dynamic transverse force, and the static module is used for acquiring and storing static transverse force; and the dynamic signal analysis module is used for analyzing and calculating the dynamic transverse force acquired by the dynamic module according to a preset analysis method.
The upper computer is used for recording the peak value and the peak-valley value of the waveform of the fatigue testing machine under given conditions; wherein the given condition includes: dynamic and static forces are given, different frequencies are given, different average test force dynamic forces and different dynamic forces are given.
And a transverse force sensor of the standard dynamometer is connected with the dynamic data acquisition device through a special sensor wire, and the dynamic data acquisition device is connected with the upper computer through a special signal transmission wire. Preferably, the dedicated signal transmission line includes an RS232 bus, an RS485 bus, a CAN bus, and the like.
In summary, the standard dynamometer and the dynamic force calibration system for the fatigue testing machine provided by the invention comprise a standard dynamometer for testing dynamic and static transverse force data of the fatigue testing machine, a dynamic data acquisition device for acquiring the dynamic and static transverse force acquired by the standard dynamometer and analyzing the dynamic and static transverse force, and an upper computer for acquiring data processed by the dynamic data acquisition device and storing and displaying the data according to a preset mode; the standard load cell was mounted on a fatigue tester to be verified. The invention measures the dynamic and static transverse forces by additionally arranging the standard dynamometer which comprises the sensor for measuring the dynamic and static transverse forces of the fatigue testing machine, and the dynamic data acquisition device calculates and analyzes the acquired data and finally displays the data on the upper computer, thereby solving the defect that the conventional fatigue testing machine cannot measure the transverse forces. The standard dynamometer is installed for a fatigue testing machine, the test can be carried out without manpower, the operation is simple and easy, and the automation degree is higher.
Furthermore, the invention connects the transverse dynamic and static force sensor by adding a special convertible tool to the corresponding positions of the moving shaft of the horizontal fatigue testing machine and the load sensor. In order to measure the stable dynamic force, back-tightening nuts are arranged on the threads at the two ends of the sensor, and a locking device is used for accurately recording the reciprocating dynamic force at the zero crossing point. The dynamic force is the peak value and peak-valley value display value of the circulating force, the dynamic force error, the peak value and peak-valley value are calculated by averaging 10 times of peak values and peak-valley values, and the peak value and peak-valley value error is calculated.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A dynamic and static force calibration system of a horizontal fatigue testing machine is characterized by comprising a standard dynamometer, a dynamic data acquisition device and an upper computer, wherein the dynamic data acquisition device is used for acquiring dynamic and static transverse forces acquired by the standard dynamometer, analyzing the dynamic and static transverse forces, and the upper computer is used for acquiring data processed by the dynamic data acquisition device and storing and displaying the data according to a preset mode; the standard dynamometer is installed on a verified fatigue testing machine;
the standard dynamometer comprises; a transverse force sensor (4) and two special convertible tools (3); one end of the transverse force sensor (4) is fixedly connected with a transverse moving shaft (1) of the fatigue testing machine through a first special convertible tool (31), and the other end of the transverse force sensor (4) is connected with a load sensor (7) of the testing machine through a second special convertible tool (32) and is fixed on a fixed shaft (6) of the fatigue testing machine; the transverse force sensor (4) and the first special convertible tool (31) are fixed on a station through a transverse moving shaft (1); the transverse force sensor is used for detecting dynamic and static transverse forces of the fatigue testing machine.
2. The horizontal type fatigue testing machine dynamic and static force calibration system according to claim 1, wherein the transverse force sensor (4) is connected with the special convertible tooling (3) through a thread.
3. The horizontal type fatigue testing machine dynamic and static force calibration system as claimed in claim 1, characterized in that a back nut (8) is sleeved on each of the first convertible special tool (31) and the second convertible special tool (32), a locking device (2) is arranged in a matching manner, and a transverse force sensor (4) connected with the first convertible special tool (31) and the second convertible special tool (32) is stably fixed on the transverse moving shaft and the fixing shaft (6).
4. The dynamic and static force calibration system of the horizontal fatigue testing machine according to claim 1, wherein two ends of the standard dynamometer are respectively fixed on the transverse moving shaft of the fatigue testing machine at one end and the fixed shaft of the fatigue testing machine at the other end through a sleeved convertible special fixture and a correspondingly configured locking device.
5. The horizontal fatigue testing machine dynamic and static force calibration system according to claim 1, wherein the dynamic data acquisition device comprises a dynamic signal analysis module, a dynamic module and a static module; the dynamic module is used for acquiring and storing dynamic transverse force, and the static module is used for acquiring and storing static transverse force; and the dynamic signal analysis module is used for analyzing and calculating the dynamic transverse force acquired by the dynamic module according to a preset analysis method.
6. The horizontal type fatigue testing machine dynamic and static force calibration system as claimed in claim 1, wherein the upper computer is used for recording the peak value and the peak-valley value of the fatigue testing machine waveform under given conditions; wherein the given condition includes: dynamic and static forces are given, different frequencies are given, different average test force dynamic forces and different dynamic forces are given.
7. The dynamic and static force calibration system of the horizontal fatigue testing machine according to claim 1, wherein the transverse force sensor of the standard force gauge is connected with the dynamic data acquisition device through a dedicated sensor line, and the dynamic data acquisition device is connected with the upper computer through a dedicated signal transmission line.
8. The dynamic and static force calibration system of the horizontal fatigue testing machine according to claim 7, wherein the special signal transmission line comprises an RS232 bus, an RS485 bus and a CAN bus.
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2020
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