CN108593233B - Fatigue strength measuring equipment and system - Google Patents

Fatigue strength measuring equipment and system Download PDF

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Publication number
CN108593233B
CN108593233B CN201810351030.5A CN201810351030A CN108593233B CN 108593233 B CN108593233 B CN 108593233B CN 201810351030 A CN201810351030 A CN 201810351030A CN 108593233 B CN108593233 B CN 108593233B
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China
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fastener
fatigue strength
tested
vibration
excitation
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CN108593233A (en
Inventor
赵才友
王平
卢俊
胡鑫
韦凯
肖杰灵
陈嵘
于中玲
孙旭
王刘翀
邢梦婷
高俊超
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Southwest Jiaotong University
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Southwest Jiaotong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures

Abstract

The invention provides a fatigue strength measuring device and a system, wherein the device comprises an acquisition unit, an excitation unit and a measuring unit; the vibration excitation unit comprises a balance base, a supporting tool, a vibration excitation device and a force guide piece, wherein the supporting tool and the vibration excitation device are oppositely arranged on the balance base and are fixedly connected with each other through the force guide piece; the acquisition unit is arranged on the fastener to be tested and used for acquiring the vibration response data of the fastener to be tested; the measuring unit is respectively electrically connected with the acquisition unit and the vibration excitation device and is used for controlling the working states of the acquisition unit and the vibration excitation device and calculating the fatigue strength of the fastener to be tested according to the acquired vibration response data to obtain corresponding fatigue strength information. The equipment has high measurement accuracy and high measurement efficiency, and can reduce the consumption of human resources.

Description

Fatigue strength measuring equipment and system
Technical Field
The invention relates to the technical field of fatigue strength measurement, in particular to a fatigue strength measuring device and system.
Background
Railway lines are important transportation means in modern society, the safety of the railway lines is closely related to the lives of people, but under the action of dynamic loads of trains on the railway lines, the key fasteners of a track structure in the railway lines usually have high-frequency fatigue fracture failure phenomena. Along with the failure of the fastener, the dynamic response between the train and the steel rail is deteriorated, and the fastener is also broken and flies out in the running process of the train to break parts of the train, so that the normal running of the train is seriously threatened. Therefore, measuring the fatigue strength of critical fasteners in rail structures is a very important issue.
At present, the fatigue strength of fasteners is usually measured by manual measurement in the mainstream of the industry, but the measurement accuracy of the test scheme is not high, the measurement efficiency is low, and a large amount of human resources are required to be consumed to realize the measurement of the fatigue strength.
Disclosure of Invention
In order to overcome the above defects in the prior art, the present invention provides a fatigue strength measuring device and system, wherein the fatigue strength measuring device has high measuring accuracy and high measuring efficiency, and can reduce the consumption of human resources.
As for equipment, a preferred embodiment of the present invention provides a fatigue strength measuring apparatus, which includes an acquisition unit, an excitation unit, and a measuring unit;
the vibration excitation unit comprises a balance base, a supporting tool, a vibration excitation device and a force guide piece, wherein the supporting tool and the vibration excitation device are oppositely arranged on the balance base and are fixedly connected with each other through the force guide piece;
the acquisition unit is arranged on the fastener to be tested and is used for acquiring vibration response data of the fastener to be tested after the excitation force is applied by the excitation unit;
the measuring unit is respectively electrically connected with the acquisition unit and the vibration excitation device in the vibration excitation unit, and is used for controlling the working states of the acquisition unit and the vibration excitation device, and calculating the fatigue strength of the fastener to be tested according to the vibration response data acquired by the acquisition unit to obtain corresponding fatigue strength information.
In a preferred embodiment of the present invention, the vibration exciting device includes a vibration table and a vibration table base for supporting the vibration table;
the vibrating table base is fixedly arranged on the balance base and borne on the vibrating table base, the force guide piece is in mutual contact with the vibrating table and is fixedly connected with the vibrating table and the vibrating table base through bolts, and the exciting force generated by the vibrating table is conducted to the fastener to be tested.
In a preferred embodiment of the present invention, the vibration table includes a horizontal sliding table and a moving coil structure for generating an exciting force;
the horizontal sliding table is fixedly connected with the moving coil structure and is respectively fixed with the force guide piece and the vibration table base through bolts, so that the exciting force generated by the moving coil structure is transmitted to the fastener to be tested through the horizontal sliding table and the force guide piece.
In a preferred embodiment of the present invention, the vibration table base includes a moving coil base and a sliding table base;
one side of the moving coil base is in contact with and fixed to the balance base, and the other side, far away from the balance base, of the moving coil base is in contact with the moving coil structure so as to bear the moving coil structure;
the other side of the moving coil base, which is far away from the balance base, is fixedly connected with the sliding table base, so that the horizontal sliding table connected with the moving coil structure is in mutual contact with the sliding table base and is fixed with the sliding table base and the force guide piece through bolts.
In a preferred embodiment of the present invention, the force guiding member includes a transfer tool and a force guiding plate;
the force guide plate is in contact with and fixed to the horizontal sliding table, the switching tool is respectively in fixed connection with the supporting tool and the force guide plate through bolts, and the switching tool is in contact with a fastener to be tested, installed on the supporting tool, so that exciting force conducted through the horizontal sliding table is applied to the fastener to be tested through the force guide plate.
In a preferred embodiment of the present invention, the transfer tool is a rectangular parallelepiped structure, one side of the transfer tool is fixedly connected to the top end of the support tool, the other side of the transfer tool, which is away from the support tool, is fixedly connected to one side of the force guide plate, and the side of the force guide plate, which is fixed to the transfer tool, is also in contact with and fixed to the horizontal sliding table.
In a preferred embodiment of the present invention, the vibration response data includes vibration acceleration data and stress variation data, and the acquisition unit includes a plurality of three-way acceleration sensors and a plurality of three-way strain gauges;
the three-way acceleration sensors are respectively arranged at positions with large vibration response amplitude on the fastener to be tested and used for collecting vibration acceleration data of the corresponding positions of the fastener to be tested under the action of corresponding exciting forces;
the three-way strain gages are respectively arranged at positions, with concentrated stress changes, of the fasteners to be tested and are used for collecting stress change data of the corresponding positions of the fasteners to be tested under the action of corresponding exciting forces.
In a preferred embodiment of the present invention, the measuring unit includes a control module and a calculating module;
the control module is respectively electrically connected with the acquisition unit and an excitation device in the excitation unit and is used for controlling the excitation device to apply an excitation force to the fastener to be tested and/or controlling the acquisition unit to acquire vibration response data of the fastener to be tested after the excitation force is applied;
the control module is further electrically connected with the computing module and used for sending the vibration response data of the fastener to be tested, which is acquired by the acquisition unit, to the computing module so that the computing module can compute the fatigue strength of the fastener to be tested according to the vibration response data.
In a preferred embodiment of the present invention, the fastener to be tested is a spring-strip fastener, and the spring-strip fastener includes any one of a W-shaped spring strip and an E-shaped spring strip.
In terms of system, a preferred embodiment of the present invention provides a fatigue strength measuring system, which includes a power supply device and the above-mentioned fatigue strength measuring device, wherein the power supply device is electrically connected to the fatigue strength measuring device and is configured to provide electric energy to the fatigue strength measuring device, so that the fatigue strength measuring device operates normally.
Compared with the prior art, the fatigue strength measuring device and the fatigue strength measuring system provided by the preferred embodiment of the invention have the following beneficial effects: the fatigue strength measuring equipment is high in measuring accuracy and measuring efficiency, and consumption of human resources can be reduced. The fatigue strength measuring equipment comprises an acquisition unit, an excitation unit and a measuring unit; the vibration excitation unit comprises a balance base, a supporting tool, a vibration excitation device and a force guide piece, wherein the supporting tool and the vibration excitation device are oppositely arranged on the balance base and are fixedly connected with each other through the force guide piece; the acquisition unit is arranged on the fastener to be tested and is used for acquiring vibration response data of the fastener to be tested after the excitation force is applied by the excitation unit; the measuring unit is respectively electrically connected with the acquisition unit and the vibration excitation device in the vibration excitation unit, and is used for controlling the working states of the acquisition unit and the vibration excitation device, calculating the fatigue strength of the fastener to be tested according to the vibration response data acquired by the acquisition unit, and obtaining corresponding fatigue strength information, so that the fatigue strength measurement with high measuring efficiency and high measuring accuracy is realized by reducing the consumption of human resources.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the claims of the present invention, and it is obvious for those skilled in the art that other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a fatigue strength measuring apparatus according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a vibration excitation unit according to a preferred embodiment of the present invention.
Fig. 3 is a schematic distribution diagram of the acquisition units according to the preferred embodiment of the present invention.
Fig. 4 is a block diagram of a measurement unit according to a preferred embodiment of the present invention.
Fig. 5 is a block diagram of a fatigue strength measuring system according to a preferred embodiment of the present invention.
Icon: 100-fatigue strength measuring equipment; 110-an acquisition unit; 120-a vibration excitation unit; 130-a measurement unit; 121-a balancing base; 122-supporting the tool; 123-an excitation device; 124-force guide member; 200-a fastener to be tested; 125-a vibration table; 126-a vibration table base; 1251-horizontal slide; 1252-moving coil configuration; 1261-moving coil base; 1262-a slide base; 127-switching over the frock; 128-force guide plate; 111-three-way acceleration sensor; 112-three-way strain gage; 131-a control module; 132-a calculation module; 10-fatigue strength measurement system; 300-Power supply equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a block diagram of a fatigue strength measuring apparatus 100 according to a preferred embodiment of the present invention. In the embodiment of the present invention, the fatigue strength measuring apparatus 100 is used for measuring the fatigue strength of a fastener, which needs to be subjected to fatigue strength measurement in a track structure, with high measuring efficiency and high measuring accuracy, so as to reduce human resource consumption and improve train operation safety. The fatigue strength measuring device 100 comprises an acquisition unit 110, an excitation unit 120 and a measuring unit 130, wherein the excitation unit 120 is used for applying an excitation force to a fastener to be measured, the acquisition unit 110 is used for acquiring vibration response data of the fastener to be measured after the excitation force is applied by the excitation unit 120, and the measuring unit 130 is electrically connected with the acquisition unit 110 and the excitation unit 120 respectively and is used for controlling the working states of the acquisition unit 110 and the excitation unit 120 and calculating the fatigue strength according to the vibration response data acquired by the acquisition unit 110 to obtain corresponding fatigue strength information. The measurement unit 130 may control a frequency of an exciting force applied by the excitation unit 120, an amplitude of the exciting force, a time point of the force application, and a time period of the force application; the measurement unit 130 may control a point of time at which the acquisition unit 110 acquires data.
Optionally, referring to fig. 2, a schematic structural diagram of the excitation unit 120 according to a preferred embodiment of the present invention is shown. In this embodiment, the excitation unit 120 includes a balance base 121, a support tool 122, an excitation device 123, and a force guide 124. The balance base 121 is used for placing the support tool 122 and the vibration excitation device 123, and keeping the support tool 122 and the vibration excitation device 123 balanced; the supporting tool 122 is used for installing a fastener to be tested 200, and the excitation device 123 is fixedly connected with the supporting tool 122 through the force guide 124 so as to apply an excitation force to the fastener to be tested 200 installed on the supporting tool 122 through the force guide 124.
Specifically, the supporting tool 122 and the excitation device 123 are oppositely disposed on the balance base 121, and are detachably connected to the balance base 121 through bolts. The fastener under test 200 mounted on the support tool 122 is in contact with the force guide 124 to receive an excitation force applied by the excitation device 123 through the force guide 124. The number of the fasteners to be tested 200 mounted on the supporting tool 122 may be one or two. In an embodiment of the present embodiment, the number of the fasteners to be tested 200 is two, and the two fasteners to be tested 200 are respectively disposed on two opposite sides of the supporting fixture 122 and are fixedly connected to each other by bolts.
In this embodiment, the vibration excitation device 123 includes a vibration table 125 and a vibration table base 126 for supporting the vibration table 125. The vibration table base 126 is fixedly arranged on the balance base 121, the vibration table 125 borne on the vibration table base 126 is used for generating an excitation force, the force guide member 124 is in mutual contact with the vibration table 125, and is fixedly connected with the vibration table 125 and the vibration table base 126 through bolts, so that the excitation force generated by the vibration table 125 is transmitted to the fastener to be tested 200.
In this embodiment, the vibration table 125 includes a horizontal sliding table 1251 and a moving coil structure 1252 for generating an excitation force, and the horizontal sliding table 1251 is fixed to the force guide 124 and the vibration table base 126 by bolts and is fixedly connected to the moving coil structure 1252, so that the excitation force generated by the moving coil structure 1252 is transmitted to the fastener to be tested 200 through the horizontal sliding table 1251 and the force guide 124.
The vibration table base 126 includes a moving coil base 1261 and a slide table base 1262. The moving coil base 1261 and the sliding table base 1262 are respectively used for bearing the moving coil structure 1252 and the horizontal sliding table 1251. Specifically, one side of the moving coil base 1261 is in contact with and fixed to the balance base 121, and the other side of the moving coil base 1261, which is away from the balance base 121, is in contact with the moving coil structure 1252 to support the moving coil structure 1252.
The other side of the moving coil base 1261, which is far from the balance base 121, is also fixedly connected to the slide table base 1262, so that the horizontal slide table 1251 connected to the moving coil structure 1252 and the slide table base 1262 are in contact with each other and are fixed to the slide table base 1262 and the force guide 124 by bolts.
In this embodiment, the force guide 124 includes a transfer tool 127 and a force guide plate 128. The transfer tool 127 is in contact with a fastener to be tested 200 mounted on the support tool 122, and the force guide plate 128 is used for connecting the transfer tool 127 and the horizontal sliding table 1251, so as to transmit an excitation force generated by the moving coil structure 1252 to the fastener to be tested 200 in contact with the transfer tool 127.
Specifically, the force guide plate 128 is in contact with and fixed to the horizontal sliding table 1251, the transfer tool 127 is fixedly connected to the support tool 122 and the force guide plate 128 by bolts, and the transfer tool 127 is in contact with the fastener to be tested 200 mounted on the support tool 122, so as to apply the excitation force transmitted through the horizontal sliding table 1251 to the fastener to be tested 200 through the force guide plate 128.
In this embodiment, the transfer tool 127 is a rectangular parallelepiped structure, one side of the transfer tool 127 is fixedly connected to the top end of the support tool 122, the other side of the support tool 122 is far away from the transfer tool 127 and is fixedly connected to one side of the force guide plate 128, and the side of the force guide plate 128 fixed to the transfer tool 127 is also in contact with and fixed to the horizontal sliding table 1251.
Fig. 3 is a schematic diagram of a distribution of the acquisition units 110 according to a preferred embodiment of the invention. In this embodiment, the vibration response data acquired by the acquisition unit 110 corresponding to the fastener under test 200 may include vibration acceleration data and stress variation data. The acquisition unit 110 includes a plurality of three-way acceleration sensors 111 and a plurality of three-way strain gauges 112, and the acquisition unit 110 acquires vibration acceleration data and stress variation data of the fastener to be tested 200 at each position respectively through the plurality of three-way acceleration sensors 111 and the plurality of three-way strain gauges 112.
Optionally, the three-way acceleration sensors 111 are respectively disposed at positions of the fastener under test 200 where the vibration response amplitude is large, and are configured to collect vibration acceleration data of the fastener under test 200 at corresponding positions under the action of corresponding exciting forces.
Optionally, the three-way strain gauges 112 are respectively disposed at positions of the fastener under test 200 where stress variation is concentrated, and are configured to collect stress variation data of the fastener under test 200 at corresponding positions under the action of corresponding exciting forces.
Fig. 4 is a block diagram of the measurement unit 130 according to the preferred embodiment of the invention. In this embodiment, the measuring unit 130 is a computer with a processor, which may be an integrated circuit chip with signal processing capability, and can perform data processing on the vibration response data collected by the collecting unit 110 to obtain the fatigue strength of the fastener 200 to be tested. The Processor may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like. But may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The measuring unit 130 includes a control module 131 and a calculation module 132, where the control module 131 is electrically connected to the collecting unit 110 and the excitation device 123 in the excitation unit 120, and is configured to control the excitation device 123 to apply an excitation force to the fastener to be tested 200, and/or control the collecting unit 110 to collect vibration response data of the fastener to be tested 200 after the excitation force is applied.
The control module 131 is further electrically connected to the calculation module 132, and is configured to send the vibration response data of the fastener to be tested 200 acquired by the acquisition unit 110 to the calculation module 132, so that the calculation module 132 calculates the fatigue strength of the fastener to be tested 200 according to the vibration response data.
The process that the measuring unit 130 controls the working states of the excitation unit 120 and the acquisition unit 110 and accordingly obtains the fatigue strength of the fastener to be tested 200 is as follows:
firstly, the measurement unit 130 applies an excitation force within a preset excitation frequency range to the fastener to be tested 200 mounted on the support tool 122 by controlling the excitation device 123, so that the fastener to be tested 200 vibrates;
secondly, the measuring unit 130 acquires vibration acceleration data and stress variation data corresponding to each position of the fastener to be tested 200 under the excitation force by controlling the three-way acceleration sensor 111 and the three-way strain gauge 112 in the acquisition unit 110;
then, the measuring unit 130 performs modal analysis on the collected vibration acceleration data and stress variation data corresponding to each position of the fastener to be tested 200 to obtain a plurality of working modes of the fastener to be tested 200, and obtains a target participation mode of the fastener to be tested 200 from the plurality of working modes;
then, the measurement unit 130 controls the excitation device 123 to perform a vibration test on the fastener to be tested 200 according to the excitation frequency and the excitation amplitude corresponding to the target participation mode, and controls the acquisition unit 110 to acquire vibration acceleration data and stress change data of each position of the fastener to be tested 200 at the corresponding excitation frequency and the corresponding excitation amplitude;
finally, the measuring unit 130 calculates the fatigue strength corresponding to the fastener to be tested 200 based on the collected vibration acceleration data and stress variation data of the fastener to be tested 200 in the target participation mode.
In this embodiment, the fastener to be tested 200 is a spring strip fastener, and the spring strip fastener includes any one of a W-shaped spring strip and an E-shaped spring strip.
Fig. 5 is a block diagram of a fatigue strength measuring system 10 according to a preferred embodiment of the present invention. In an embodiment of the present invention, the fatigue strength measuring system 10 includes a power supply device 300 and the above-mentioned fatigue strength measuring device 100, wherein the power supply device 300 is electrically connected to the fatigue strength measuring device 100, and is configured to provide electric energy to the fatigue strength measuring device 100, so as to enable the fatigue strength measuring device 100 to operate normally.
In summary, in the fatigue strength measuring apparatus and the fatigue strength measuring system according to the preferred embodiments of the present invention, the fatigue strength measuring apparatus has high measurement accuracy and high measurement efficiency, and can reduce the consumption of human resources. The fatigue strength measuring equipment comprises an acquisition unit, an excitation unit and a measuring unit; the vibration excitation unit comprises a balance base, a supporting tool, a vibration excitation device and a force guide piece, wherein the supporting tool and the vibration excitation device are oppositely arranged on the balance base and are fixedly connected with each other through the force guide piece; the acquisition unit is arranged on the fastener to be tested and is used for acquiring vibration response data of the fastener to be tested after the excitation force is applied by the excitation unit; the measuring unit is respectively electrically connected with the acquisition unit and the vibration excitation device in the vibration excitation unit, and is used for controlling the working states of the acquisition unit and the vibration excitation device, calculating the fatigue strength of the fastener to be tested according to the vibration response data acquired by the acquisition unit, and obtaining corresponding fatigue strength information, so that the fatigue strength measurement with high measuring efficiency and high measuring accuracy is realized by reducing the consumption of human resources.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The fatigue strength measuring equipment is characterized by comprising an acquisition unit, an excitation unit and a measuring unit;
the vibration excitation unit comprises a balance base, a supporting tool, a vibration excitation device and a force guide piece, wherein the supporting tool and the vibration excitation device are oppositely arranged on the balance base and are fixedly connected with each other through the force guide piece;
the force guide piece comprises a switching tool and a force guide plate, the force guide plate is in contact with and fixed to the horizontal sliding table, the switching tool is fixedly connected with the supporting tool and the force guide plate through bolts respectively, the switching tool is in contact with a fastener to be tested, which is installed on the supporting tool, so that an exciting force transmitted through the horizontal sliding table is applied to the fastener to be tested through the force guide plate, and the vibration direction of the excitation device is the same as the transmission direction of the exciting force;
the acquisition unit is arranged on the fastener to be tested and is used for acquiring vibration response data of the fastener to be tested after the excitation force is applied by the excitation unit;
the measuring unit is respectively electrically connected with the acquisition unit and the vibration excitation device in the vibration excitation unit, and is used for controlling the working states of the acquisition unit and the vibration excitation device, and calculating the fatigue strength of the fastener to be tested according to the vibration response data acquired by the acquisition unit to obtain corresponding fatigue strength information.
2. The fatigue strength measuring apparatus according to claim 1, wherein the vibration exciting device includes a vibrating table and a vibrating table base for carrying the vibrating table;
the vibrating table base is fixedly arranged on the balance base and borne on the vibrating table base, the force guide piece is in mutual contact with the vibrating table and is fixedly connected with the vibrating table and the vibrating table base through bolts, and the exciting force generated by the vibrating table is conducted to the fastener to be tested.
3. The fatigue strength measuring apparatus according to claim 2, wherein the vibrating table includes a horizontal sliding table and a moving coil structure for generating an exciting force;
the horizontal sliding table is fixedly connected with the moving coil structure and is respectively fixed with the force guide piece and the vibration table base through bolts, so that the exciting force generated by the moving coil structure is transmitted to the fastener to be tested through the horizontal sliding table and the force guide piece.
4. The fatigue strength measuring apparatus according to claim 3, wherein the vibrating table base includes a moving coil base and a slide table base;
one side of the moving coil base is in contact with and fixed to the balance base, and the other side, far away from the balance base, of the moving coil base is in contact with the moving coil structure so as to bear the moving coil structure;
the other side of the moving coil base, which is far away from the balance base, is fixedly connected with the sliding table base, so that the horizontal sliding table connected with the moving coil structure is in mutual contact with the sliding table base and is fixed with the sliding table base and the force guide piece through bolts.
5. The fatigue strength measuring equipment of claim 1, wherein the transfer tool is a cuboid structure, one side of the transfer tool is fixedly connected with the top end of the support tool, the other side of the transfer tool, which is far away from the support tool, is fixedly connected with one side of the force guide plate, and the side of the force guide plate, which is fixed by the transfer tool, is in contact with and fixed by the horizontal sliding table.
6. The fatigue strength measurement device of claim 1, wherein the vibration response data includes vibration acceleration data and stress variation data, and the acquisition unit includes a plurality of three-way acceleration sensors and a plurality of three-way strain gauges;
the three-way acceleration sensors are respectively arranged at positions with large vibration response amplitude on the fastener to be tested and used for collecting vibration acceleration data of the corresponding positions of the fastener to be tested under the action of corresponding exciting forces;
the three-way strain gages are respectively arranged at positions, with concentrated stress changes, of the fasteners to be tested and are used for collecting stress change data of the corresponding positions of the fasteners to be tested under the action of corresponding exciting forces.
7. The fatigue strength measurement apparatus according to claim 1, wherein the measurement unit includes a control module and a calculation module;
the control module is respectively electrically connected with the acquisition unit and an excitation device in the excitation unit and is used for controlling the excitation device to apply an excitation force to the fastener to be tested and/or controlling the acquisition unit to acquire vibration response data of the fastener to be tested after the excitation force is applied;
the control module is further electrically connected with the computing module and used for sending the vibration response data of the fastener to be tested, which is acquired by the acquisition unit, to the computing module so that the computing module can compute the fatigue strength of the fastener to be tested according to the vibration response data.
8. The fatigue strength measuring apparatus according to any one of claims 1 to 7, wherein the fastener to be tested is a spring-strip fastener including any one of a W-type spring strip and an E-type spring strip.
9. A fatigue strength measuring system, comprising a power supply device and the fatigue strength measuring device of any one of claims 1 to 8, wherein the power supply device is electrically connected to the fatigue strength measuring device for supplying electric energy to the fatigue strength measuring device so as to enable the fatigue strength measuring device to operate normally.
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