CN109186437B

CN109186437B - Displacement sensor

Info

Publication number: CN109186437B
Application number: CN201811207027.2A
Authority: CN
Inventors: 郑志霞; 陈雪娇; 张琴; 陈越; 蔡丽晗
Original assignee: Putian University
Current assignee: Putian University
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-08-04
Anticipated expiration: 2038-10-17
Also published as: CN109186437A

Abstract

The invention discloses a displacement sensor, which comprises an electrode box, wherein an electronic plate is arranged in the electrode box, a waveguide tube is arranged on one side of the electrode box, a universal ball seat is arranged at a position, close to one side of the waveguide tube, on the electrode box, a universal ball is arranged on one side of the universal ball seat, a protective rod is arranged on one side of the universal ball, a damping rotating shaft is arranged at the bottom of the electrode box, a connecting plate is arranged at the bottom of the damping rotating shaft, a first clamping plate is arranged at the bottom of the connecting plate, a second clamping plate is arranged on one side of the first clamping plate, and an iron bar is arranged at the bottom of the first clamping plate. The measuring error of the displacement sensor after being influenced by external force is reduced.

Description

Displacement sensor

Technical Field

The invention belongs to the technical field of displacement sensors, and particularly relates to a displacement sensor.

Background

The displacement sensor is also called as a linear sensor and belongs to a metal induction linear device, the sensor is used for converting various measured physical quantities into electric quantity, in the production process, the measurement of displacement is generally divided into measurement of physical size and mechanical displacement, and the magnetostrictive displacement sensor accurately detects the absolute position of a movable magnetic ring through a non-contact measurement and control technology to measure the actual displacement value of a measured product according to different conversion forms of the measured variables.

However, the displacement sensor on the current market cannot meet the use requirements, the displacement sensor lacks a fixing structure, the direction is not convenient to adjust after the fixing, and lacks a protection structure for an external waveguide tube, and the displacement sensor is provided based on the problems.

Disclosure of Invention

The present invention is directed to a displacement sensor, so as to solve the problems that the displacement sensor proposed in the above-mentioned background art is inconvenient to mount on different fixing surfaces, and an external waveguide is easily damaged by an external force.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a displacement sensor, includes the electrode box, the internally mounted of electrode box has the electronic plate, and one side of electrode box installs the waveguide tube, the last one side position department of being close to the waveguide tube of electrode box installs universal ball seat, and one side of universal ball seat installs universal ball, the fender rod is installed to one side of universal ball, the damping pivot is installed to the bottom of electrode box, and the bottom of damping pivot installs the connecting plate, first splint are installed to the bottom of connecting plate, and one side of first splint installs the second splint, the ironbar is installed to the inside bottom of first splint, the sealed lid of one side of electrode box is passed through countersunk head bolt fixedly connected with, and one side of sealed lid installs sensitive piece pipe, the cable is installed to one side of sensitive piece pipe, electronic plate and external control ware electric connection.

Preferably, the electronic board is electrically connected with the external controller through a cable.

Preferably, the connecting plate is of a T-shaped structure.

Preferably, the universal ball seats are provided with two, and the two universal ball seats are respectively fixed on the sealing cover and the electrode box.

Preferably, the rotation angle of the electrode cartridge ranges from 0 ° to 360 °.

Preferably, the electronic board is provided with a signal transmitting and receiving circuit, and the signal transmitting and receiving circuit comprises an excitation pulse generating module for generating an excitation pulse signal; a pulse current transmitting module for converting the excitation pulse signal into a required current pulse transmitting signal; an interface circuit for connecting a signal to the displacement sensor; an echo signal receiving and amplifying module for receiving and amplifying the weak echo signals; a filter module to filter the signal; and finally, the distance is calculated after the echo signals are sampled and processed by the DSP.

Preferably, the signal transmitting and receiving circuit further comprises a comparing circuit module for shaping the signal, and the comparing circuit module is connected with the filter module and is used for shaping the echo signal.

Compared with the prior art, the invention has the beneficial effects that:

(1) the damping rotating shaft, the connecting plate and the clamping plate are arranged, when the damping rotating shaft is used, the electrode box is arranged on the working plane by utilizing the fixation of the first clamping plate and the second clamping plate at the bottom of the electrode box, so that the problems that a displacement sensor is lack of a fixed structure and the direction is inconvenient to adjust after the displacement sensor is fixed are solved, a user can conveniently adjust the orientation of the displacement sensor, the problem that a large amount of time is consumed due to the fact that a fastening piece is disassembled when the position of the displacement sensor is replaced is solved, and the operation of using the displacement sensor is simpler and more convenient.

(2) When the displacement sensor is used, when the displacement sensor is fixed on a working place, the protection rod is opened, the position orientation of the protection rod is adjusted, an object applying external force to the waveguide tube is blocked by the protection rod, the problem that the waveguide tube is damaged due to impact is avoided, the waveguide tube is not touched by the object, the service life of the waveguide tube is prolonged, the problem that an external waveguide tube protection structure is lacked is solved, and the measurement error generated after the displacement sensor is influenced by the external force is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a rear view of the present invention;

in the figure: 1-a cable; 2-sealing cover; 3-countersunk head bolt; 4-a sensor catheter; 5-a waveguide; 6-damping rotating shaft; 7-a connecting plate; 8-a first splint; 9-a universal ball seat; 10-a universal ball; 11-a guard bar; 12-an electrode cartridge; 13-iron bar; 14-a second splint; 15-electronic board.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-3, the present invention provides the following technical solutions: a displacement sensor comprises an electrode box 12, wherein an electronic board 15 is installed inside the electrode box 12, a signal transmitting and receiving circuit is arranged on the electronic board 15, and the signal transmitting and receiving circuit comprises an excitation pulse generating module for generating an excitation pulse signal; a pulse current transmitting module for converting the excitation pulse signal into a required current pulse transmitting signal; an interface circuit for connecting a signal to the displacement sensor; an echo signal receiving and amplifying module for receiving and amplifying the weak echo signals; a filter module to filter the signal; the comparison circuit module is connected with the filter module and is used for shaping the echo signal; finally, the distance is calculated after sampling processing is carried out on the echo signals by using the DSP; and one side of the electrode box 12 is installed with the waveguide tube 5, one side position of the electrode box 12 close to the waveguide tube 5 is installed with the universal ball seat 9, one side of the universal ball seat 9 is installed with the universal ball 10, one side of the universal ball 10 is installed with the protection rod 11, the protection rod 11 is used for blocking the object applying external force to the waveguide tube 5, thereby avoiding the problem that the waveguide tube 5 is damaged by impact, the bottom of the electrode box 12 is installed with the damping rotating shaft 6, the bottom of the damping rotating shaft 6 is installed with the connecting plate 7, the connecting plate 7 is of soft tissue structure, generates deformation according to the deformation of the clamping plate, thereby being beneficial to the free deformation of the clamping plate, the bottom of the connecting plate 7 is installed with the first clamping plate 8, one side of the first clamping plate 8 is installed with the second clamping plate 14, the bottom of the electrode box 12 is fixed by the first clamping plate 8 and the second clamping, the problem of the direction is not convenient for adjust after fixed, and the iron bar 13 is installed to the inside bottom of first splint 8, and the sealed lid 2 of 3 fixedly connected with of countersunk head bolt is passed through to one side of electrode box 12, and the sensitive part pipe 4 is installed to one side of sealed lid 2, and cable 1 is installed to one side of sensitive part pipe 4, electronic board 15 and external control ware electric connection.

In order to facilitate the detection of the change of the electrical signal of the displacement sensor, the electronic board 15 is preferably electrically connected to an external controller via the cable 1.

In order to facilitate the installation and fixation of the clamping plate, the connecting plate 7 is preferably in a T-shaped structure.

In order to protect the waveguide 5 in two directions, it is preferable that the universal ball seats 9 are provided in total, and the two universal ball seats 9 are fixed to the sealing cover 2 and the electrode case 12, respectively.

To facilitate adjustment of the measurement orientation, it is preferred that the electrode cartridge 12 be rotated through an angle in the range of 0 ° to 360 °.

The working principle and the using process of the invention are as follows: when the displacement sensor is used, a user installs the electronic board 15 in the electrode box 12, then connects the sensitive element guide tube 4 and the waveguide tube 5 with the electronic board 15 through a lead, the lead passes through the hole on the sealing cover 2, then fixes the sealing cover 2 on the electrode box 12 through the countersunk head bolt 3, connects the cable 1 with an external controller, when the displacement sensor is used, the user manually breaks the iron strips 13 at the bottoms of the first clamping plate 8 and the second clamping plate 14 according to the installation position of the displacement sensor, forcibly folds and deforms the iron strips 13, clamps the clamping plates on the installation position, can rotate the damping rotating shaft 6 to change the orientation of the displacement sensor, after the power is switched on, the user opens a control device which is externally connected with the displacement sensor, the displacement sensor is switched on to work, current pulses are generated in the electronic board 15 of the displacement sensor, and are transmitted in the waveguide tube 5, so that a circumferential magnetic field is generated outside the waveguide tube, when the sensitive element guide pipe 4 is electrified, a magnetic field can be generated according to the generation principle of the magnetic field of the waveguide pipe 5, when an object passes through the magnetic field, the two magnetic fields fluctuate to cause the change of an electric signal on the electronic board 15, and then the distance is calculated after the echo signal is sampled and processed by the DSP to finish displacement detection.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A displacement sensor comprising an electrode cartridge (12), characterized in that: the electrode box comprises an electrode box (12), a waveguide tube (5) is installed on one side of the electrode box (12), a universal ball seat (9) is installed at one side position, close to the waveguide tube (5), of the electrode box (12), a universal ball (10) is installed on one side of the universal ball seat (9), a protective rod (11) is installed on one side of the universal ball (10), a damping rotating shaft (6) is installed at the bottom of the electrode box (12), a connecting plate (7) is installed at the bottom of the damping rotating shaft (6), a first clamping plate (8) is installed at the bottom of the connecting plate (7), a second clamping plate (14) is installed on one side of the first clamping plate (8), an iron bar (13) is installed at the inner bottom of the first clamping plate (8), and a sealing cover (2) is fixedly connected to one side of the electrode box (12) through a sunk bolt (3), a sensitive element guide pipe (4) is installed on one side of the sealing cover (2), a cable (1) is installed on one side of the sensitive element guide pipe (4), the electronic board (15) is electrically connected with an external controller, a signal transmitting and receiving circuit is arranged on the electronic board (15), and the signal transmitting and receiving circuit comprises an excitation pulse generating module for generating an excitation pulse signal; a pulse current transmitting module for converting the excitation pulse signal into a required current pulse transmitting signal; an interface circuit for connecting a signal to the displacement sensor; an echo signal receiving and amplifying module for receiving and amplifying the weak echo signals; a filter module to filter the signal; and finally, the distance is calculated after the echo signals are sampled and processed by the DSP.

2. A displacement sensor according to claim 1, wherein: the electronic board (15) is electrically connected with an external control through a cable (1).

3. A displacement sensor according to claim 1, wherein: the connecting plate (7) is of a T-shaped structure.

4. A displacement sensor according to claim 1, wherein: the electrode box is characterized in that the number of the universal ball seats (9) is two, and the two universal ball seats (9) are respectively fixed on the sealing cover (2) and the electrode box (12).

5. A displacement sensor according to claim 1, wherein: the rotation angle range of the electrode box (12) is 0-360 degrees.

6. A displacement sensor according to claim 1, wherein: the signal transmitting and receiving circuit further comprises a comparison circuit module for shaping signals, and the comparison circuit module is connected with the filter module and used for shaping the echo signals.