Eddy current sensor

Abstract

The utility model discloses an eddy current sensor, which comprises a front-end device, a cable connected to one end of the front-end device, and a probe connected to one end of the cable, the connecting assembly comprises a connecting inclined groove formed in one corner of the top end of the front-end device, a threaded connector fixedly connected into the connecting inclined groove and a threaded connecting cylinder connected to one end of the cable; the connecting piece is rotationally connected to the top of the front-arranged device, and the two pressing strips are symmetrically fixed to the bottom end of the connecting piece; through a designed threaded connection cylinder and a threaded connector, preliminary connection between a front-end device and a cable is completed, then a connection sheet is rotated, the top surface of the threaded connection cylinder is extruded and pressed by a press-fit strip, and then the press-fit strip is limited through clamping connection of an insertion hole and an insertion pile; according to the structure, secondary reinforcement can be carried out on connection between the threaded connector and the threaded connection cylinder, so that the connection stability is improved, meanwhile, disassembly and assembly operation between the front-end device and the cable is convenient and fast, and convenience is provided for personnel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to displacement sensor technical field, concretely relates to a kind of eddy current sensors. BACKGROUND

[0002] Eddy current displacement sensor is a kind of precision instrument that can non-contact measurement to displacement. It is mainly composed of probe, extension cable and preamplifier. Probe is built-in coil, can produce high-frequency electromagnetic field, when metal measured object is close, its surface generates eddy current, reacts on probe coil, and makes coil impedance change. Extension cable is responsible for transmission probe signal and energizes it. Preamplifier receives cable signal, and after processing, impedance change related to displacement is converted into standard electrical signal output, such as voltage or current signal. With high precision, strong anti-interference and other characteristics, it is widely used in mechanical manufacturing, aerospace and other fields, for monitoring the displacement, vibration and other conditions of equipment components.

[0003] On the existing eddy current displacement sensor, extension cable and preamplifier are generally connected by ordinary thread or plug-in mode. The stability of this connection mode is general. If the sensor mounting carrier vibrates, it may be loose or even fall off, affecting the normal use of the sensor. Therefore, a new eddy current displacement sensor needs to be designed to solve this problem. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an eddy current sensor to solve the problem of unstable connection between extension cable and preamplifier on the existing eddy current displacement sensor mentioned in the background.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an eddy current sensor, comprising

[0006] Preamplifier, cable connected to one end of preamplifier, probe connected to one end of cable;

[0007] Connecting assembly, including connecting inclined slot opened in one corner of top end of preamplifier, threaded connector fixedly connected in connecting inclined slot, threaded connecting barrel connected to one end of cable;

[0008] Connecting piece rotatably connected to top of preamplifier, two compression strips symmetrically fixed to bottom end of connecting piece, bottom sheet fixed to bottom end of compression strip, plug fixed to one side of preamplifier, plug hole opened on surface of bottom sheet and matched with plug.

[0009] Preferably, the front end of the plug is a spherical structure, and the bottom of the bottom sheet is fixed with a catch block.

[0010] Preferably, the connecting assembly further comprises a damping shaft, and the damping shaft rotatably connects one end of the connecting piece and the top surface of the preamplifier.

[0011] Preferably, the connecting assembly further comprises a rubber pad fixed to the inner side surface of the pressing strip.

[0012] Preferably, the probe comprises a threaded rod and a head, the head is arranged at the front end of the threaded rod, and the rear end of the threaded rod is connected with the cable.

[0013] Preferably, the probe further comprises a nut A and a nut B threadedly connected to the surface of the threaded rod.

[0014] Preferably, the front end device is symmetrically provided with mounting assemblies at both sides of the bottom, the mounting assemblies comprise fixing strips symmetrically fixed at both sides of the bottom end of the front end device and mounting holes formed in the fixing strips.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] Through the threaded connecting cylinder and the threaded connecting head, the preliminary connection between the front end device and the cable is completed, then the connecting piece is rotated, the top surface of the threaded connecting cylinder is extruded and pressed by the pressing strip, then the pressing strip is limited through the insertion hole and the insertion peg, the above structure can secondarily reinforce the connection between the threaded connecting head and the threaded connecting cylinder, thereby improving the stability of the connection, and the disassembly and assembly of the front end device and the cable are convenient and fast, thereby providing convenience for personnel. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional schematic view of the utility model;

[0018] Figure 2 is the utility model Figure 1 is an enlarged schematic view of area A in the utility model;

[0019] Figure 3 is a three-dimensional schematic view of the probe of the utility model;

[0020] In the drawing: 100, front end device; 200, cable; 300, probe; 301, threaded rod; 302, head; 303, nut A; 304, nut B; 400, connecting assembly; 401, connecting inclined groove; 402, threaded connecting head; 403, threaded connecting cylinder; 404, connecting piece; 405, pressing strip; 406, bottom piece; 407, insertion hole; 408, insertion peg; 409, damping rotating shaft; 500, mounting assembly; 501, fixing strip; 502, mounting hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0022] Embodiment

[0023] Please refer to Figures 1 to 3 For the embodiments of the present application, the embodiment provides a technical solution: an eddy current sensor, comprising

[0024] The preprocessor 100, the cable 200 connected to one end of the preprocessor 100, and the probe 300 connected to one end of the cable 200 constitute the main structure of the sensor.

[0025] The connecting assembly 400 comprises a connecting inclined groove 401 formed at one corner of the top end of the preprocessor 100, a threaded connector 402 fixedly connected in the connecting inclined groove 401, and a threaded connecting barrel 403 connected to one end of the cable 200. When connecting, the threaded connection between the threaded connector 402 and the threaded connecting barrel 403 is first completed by rotating, and the preliminary connection is completed.

[0026] The connecting plate 404 is rotatably connected to the top of the preprocessor 100, the two compression strips 405 are symmetrically fixed to the bottom end of the connecting plate 404, the bottom plate 406 is fixed to the bottom end of the compression strip 405, the plug 408 is fixed to one side of the preprocessor 100, and the jack 407 is formed on the surface of the bottom plate 406 and is adapted to the plug 408. After the preliminary connection is completed, the connecting plate 404 is rotated, the plug 408 and the jack 407 are clamped, and at this time the compression strip 405 is compressed and extruded on the top surface of the threaded connecting barrel 403, and the connection between the threaded connector 402 and the threaded connecting barrel 403 is reinforced again.

[0027] In the embodiment, preferably, the front end of the plug 408 is a spherical structure, the bottom of the bottom plate 406 is fixed with a trigger block, and a person can hold the trigger block with two fingers to separate the plug 408 and the jack 407, so that the connecting plate 404 can be lifted off.

[0028] In the embodiment, preferably, the connecting assembly 400 further comprises a damping rotating shaft 409, the damping rotating shaft 409 rotatably connects one end of the connecting plate 404 and the top surface of the preprocessor 100, and realizes the rotational connection between the connecting plate 404 and the preprocessor 100.

[0029] In this embodiment, preferably, the connecting component 400 further includes a rubber pad, which is fixed to the inner surface of the pressing strip 405. When the pressing strip 405 presses the threaded connecting cylinder 403, the rubber pad can play a buffering and protective role.

[0030] In this embodiment, preferably, the probe 300 includes a threaded rod 301 and a head 302. The head 302 is located at the front end of the threaded rod 301, and the rear end of the threaded rod 301 is connected to the cable 200. The probe 300 also includes nuts A303 and B304 threaded onto the surface of the threaded rod 301. Personnel can screw the threaded rod 301 into a designated position by turning it, and then tighten the nuts A303 and B304 on both sides, thereby improving the installation strength of the probe 300.

[0031] In this embodiment, preferably, mounting components 500 are symmetrically arranged on both sides of the bottom of the preamplifier 100. The mounting components 500 include fixing strips 501 symmetrically fixed on both sides of the bottom of the preamplifier 100 and mounting holes 502 opened on the fixing strips 501. The preamplifier 100 can be installed by using bolts through the mounting holes 502.

[0032] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eddy current sensor, characterized in that: include A preamplifier (100), a cable (200) connected to one end of the preamplifier (100), and a probe (300) connected to one end of the cable (200); The connecting assembly (400) includes a connecting groove (401) opened at one corner of the top of the preamplifier (100), a threaded connector (402) fixedly connected in the connecting groove (401), and a threaded connector sleeve (403) connected to one end of the cable (200). A connecting piece (404) is rotatably connected to the top of the preamplifier (100), two pressing strips (405) are symmetrically fixed to the bottom of the connecting piece (404), a bottom piece (406) is fixed to the bottom of the pressing strips (405), a stud (408) is fixed to one side of the preamplifier (100), and a socket (407) is opened on the surface of the bottom piece (406) and adapted to the stud (408).

2. The eddy current sensor according to claim 1, characterized in that: The front end of the stake (408) is a spherical structure, and the bottom of the base plate (406) is fixed with a fastening block.

3. An eddy current sensor according to claim 2, characterized in that: The connecting assembly (400) further includes a damping shaft (409) that rotatably connects one end of the connecting piece (404) to the top surface of the preamplifier (100).

4. An eddy current sensor according to claim 3, characterized in that: The connecting assembly (400) also includes a rubber pad, which is fixed to the inner surface of the pressing strip (405).

5. An eddy current sensor according to claim 4, characterized in that: The probe (300) includes a threaded rod (301) and a head (302), the head (302) being disposed at the front end of the threaded rod (301), and the rear end of the threaded rod (301) being connected to a cable (200).

6. An eddy current sensor according to claim 5, characterized in that: The probe (300) also includes nuts A (303) and B (304) that are threaded onto the surface of the threaded rod (301).

7. An eddy current sensor according to claim 6, characterized in that: The preamplifier (100) has mounting components (500) symmetrically arranged on both sides of its bottom. The mounting components (500) include fixing strips (501) symmetrically fixed on both sides of the bottom of the preamplifier (100) and mounting holes (502) opened on the fixing strips (501).

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