A coaxiality detection system for dynamic detection device

Abstract

The present invention provides a coaxiality detection system for a dynamic detection device, comprising an elastic body, a strain gauge, a sleeve and a spring bracket, a signal acquisition amplifier and a host computer. The number of the elastic bodies is two, one elastic body is fixedly connected to the output shaft of the dynamic detection device, and the other elastic body is fixedly connected to the fixed shaft of the dynamic detection device. The two elastic bodies are connected by a sleeve, the bottom of the sleeve is supported by the spring bracket, the elastic body can move freely in the sleeve, the signal acquisition amplifier is electrically connected to the strain gauge, and the signal acquisition amplifier is communicatively connected to the host computer. The present invention has a simple structure, high sensitivity, good reliability, convenient installation, and is easy to carry, and can be used in various occasions such as laboratories or on-site; the use of a disconnected structure can effectively avoid the influence of an additional axial force value on a detection result, thereby improving the accuracy of the detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a coaxiality detection system of a dynamic detection device. Background Art

[0002] The back-to-back sinusoidal comparison force sensor dynamic detection device is a test device that can realize multi-parameter output such as force, displacement, impact, vibration, etc. It can be used for fatigue testing of key components, new materials, etc. At present, coaxiality is usually detected with a single metal rod. The metal rod fixedly connected to the device will be affected by the additional force introduced during installation, thereby changing its own state and affecting the measurement results. Summary of the invention

[0003] The purpose of the present invention is to provide a coaxiality detection system for a dynamic detection device, so as to avoid the influence of an additional axial force value on the detection result and improve the accuracy of the detection result.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A coaxiality detection system for a dynamic detection device, characterized in that it includes an elastomer, a strain gauge, a sleeve and a spring bracket, a signal acquisition amplifier and a host computer, wherein the number of the elastomers is two, one elastomer is fixedly connected to the output shaft of the dynamic detection device, and the other elastomer is fixedly connected to the fixed shaft of the dynamic detection device, the two elastomers are connected by a sleeve, the bottom of the sleeve is supported by the spring bracket, the elastomer can move freely in the sleeve, the signal acquisition amplifier is electrically connected to the strain gauge, and the signal acquisition amplifier is communicatively connected to the host computer.

[0006] Furthermore, one side of the elastomer is a cylindrical structure, a plurality of notches are opened on one side of the elastomer, a thin shaft is vertically arranged in the center of the elastomer, the diameter of the thin shaft is less than 1 / 3 of the diameter of the cylinder, and an arc-shaped transition surface is arranged between the thin shaft and the cylinder.

[0007] Furthermore, four strain gauges are respectively attached to the transition surfaces at both ends of the thin shaft.

[0008] Furthermore, a positioning boss is provided at the other end of the elastic body, and the positioning boss cooperates with the positioning holes on the output shaft and the fixed shaft.

[0009] Furthermore, the sleeve is a hollow cylinder, four strain gauges are symmetrically attached to the upper and lower parts of the outer wall of the sleeve, and an air hole is provided in the middle of the sleeve.

[0010] Furthermore, the two elastic bodies are fixedly connected to the output shaft and the fixed shaft of the dynamic detection device by means of screws.

[0011] Furthermore, the diameter of the bottom of the spring support is greater than the diameter of the top of the spring support, the bottom of the spring support is a plane, and the top of the spring support is a semicircular convex surface.

[0012] The invention has the advantages of simple structure, high sensitivity, good reliability, convenient installation and portability, and can be used in various occasions such as laboratories or on-site; the disconnected structure can effectively avoid the influence of the additional axial force on the detection result, thereby improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the mechanical structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the structure of the elastomer of the present invention;

[0016] Figure 4 Another schematic diagram of the structure of the elastomer of the present invention;

[0017] Figure 5 It is a structural schematic diagram of the spring bracket of the present invention;

[0018] Figure 6 FIG. 2 is another schematic structural diagram of the spring support of the present invention.

[0019] Reference numerals:

[0020] 1 output shaft, 2 elastic body, 3 strain gauge, 4 sleeve, 5 spring bracket,

[0021] 6 fixed axis, 7 signal acquisition amplifier, 8 host computer. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention discloses a coaxiality detection system for a dynamic detection device, such as Figure 1 and Figure 2 As shown, it includes an elastic body 2, a strain gauge 3, a sleeve 4 and a spring bracket 5, a signal acquisition amplifier 7 and a host computer 8. There are two elastic bodies 2. One elastic body 2 is fixedly connected to the output shaft 1 of the dynamic detection device, and the other elastic body 2 is fixedly connected to the fixed shaft 6 of the dynamic detection device. The two elastic bodies 2 are fixedly connected to the output shaft 1 and the fixed shaft 6 of the dynamic detection device by screws.

[0024] The two elastic bodies 2 are connected by a sleeve 4, the bottom of the sleeve 4 is supported by a spring bracket 5, the elastic body 2 can move freely in the sleeve 4, the sleeve 4 is a hollow cylinder, and four strain gauges 3 are symmetrically attached to the upper and lower parts of the outer wall of the sleeve 4. An air hole is provided in the middle of the sleeve 4, and the hole is used for ventilation inside the sleeve 4 to prevent the air in the closed environment inside the sleeve 4 from generating additional force when the elastic body 2 moves up and down.

[0025] like Figure 3 and Figure 4 As shown, one side of the elastomer 2 is a cylindrical structure with a plurality of slots formed therein, the slots being filled with lubricating grease, a thin shaft being vertically provided at the center of the elastomer 2, the diameter of the thin shaft being less than 1 / 3 of the diameter of the cylinder, an arc-shaped transition surface being provided between the thin shaft and the cylinder, four strain gauges 3 being attached to the transition surfaces at both ends of the thin shaft, a positioning boss being provided at the other end of the elastomer 2, the positioning boss being matched with the positioning holes on the output shaft 1 and the fixed shaft 6.

[0026] like Figure 5 and Figure 6 As shown, the diameter of the bottom of the spring bracket 5 is larger than the diameter of the top of the spring bracket 5, the bottom of the spring bracket 5 is a plane, the spring bracket 5 can be placed stably on the elastomer 2, and the top of the spring bracket 5 is a semicircular convex surface. The semicircular convex surface provides support for the sleeve 4 while reducing the contact area between the two, thereby reducing the measurement error introduced by friction. The spring bracket 5 can offset the deadweight of the sleeve 4 without affecting the micro-deformation of the elastomer 2 and the slight change in the posture of the sleeve 4.

[0027] The signal acquisition amplifier 7 is electrically connected to the strain gauge 3 , and the signal acquisition amplifier 7 is communicatively connected to the host computer 8 .

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coaxiality detection system for a dynamic detection device, characterized in that: It includes an elastic body, a strain gauge, a sleeve and a spring bracket, a signal acquisition amplifier and a host computer. The number of the elastic bodies is two. One elastic body is fixedly connected to the output shaft of the dynamic detection device, and the other elastic body is fixedly connected to the fixed shaft of the dynamic detection device. The two elastic bodies are connected through a sleeve. The bottom of the sleeve is supported by the spring bracket. The elastic body can move freely in the sleeve. The signal acquisition amplifier is electrically connected to the strain gauge, and the signal acquisition amplifier is connected to the host computer for communication. One side of the elastic body is a cylindrical structure, and a plurality of notches are opened on one side of the elastic body. A thin shaft is vertically arranged in the center of the elastic body. The diameter of the thin shaft is less than 1 / 3 of the diameter of the cylinder. An arc-shaped transition surface is arranged between the thin shaft and the cylinder. Four strain gauges are attached to the transition surfaces at both ends of the thin shaft; The other end of the elastic body is provided with a positioning boss, which cooperates with the positioning holes on the output shaft and the fixed shaft; The sleeve is a hollow cylinder, and four strain gauges are symmetrically attached to the upper and lower parts of the outer wall of the sleeve, and an air hole is provided in the middle of the sleeve; The two elastic bodies are fixedly connected to the output shaft and the fixed shaft of the dynamic detection device by screws; The diameter of the bottom of the spring support is greater than the diameter of the top of the spring support. The bottom of the spring support is a plane, and the top of the spring support is a semicircular convex surface.

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