CN101650219B - Inside sphere type vector vibration transducer - Google Patents

Abstract

An inner ball type vector vibration sensor of the present invention is provided with four through holes in a hollow non-insulating sphere spherical container, and the four through holes form four apexes of a regular quadrangular pyramid, and the four through holes are respectively fixed with cylindrical point-contact Sensor, the structure of the point-touch sensor is: the hexagon head bolt can connect the external lead-out wire contact piece and hang into the point-touch sensor, the top of the collision link is fixed with the top of the link support spring, the bottom of the collision link is connected with the shackle of the collision link Fixed, the bottom of the link support spring is fixed with the bottom of the touch sensor. The spherical vibrator is placed in the spherical insulating shell, and there are four vibrator wires of the same length to connect the vibrator with the shackle of the collision connecting rod. Apply a suitable voltage to the spherical vibrator. When the vibrator vibrates, the four point-touch sensors can directly obtain obvious digital signals. The signal processing circuit is simple, and the system has excellent explosion-proof performance.

Description

Inner ball type vector vibration sensor

technical field

The invention belongs to the field of electrical component sensors, and relates to a vibration sensor manufactured by using the principle of inertial vibration measurement, which is widely used for long-term vibration of instruments and equipment in coal, electric power, petroleum, chemical industry, metallurgy, transportation, construction, military industry and other industries Monitoring and protection, especially for system online automatic detection and alarm system.

Background technique

Sensors for measuring vibration can be divided into: vibration displacement sensors, vibration velocity sensors and vibration acceleration sensors. According to different test reference coordinates, vibration sensors can be divided into relative vibration sensors and absolute vibration sensors. The former is used to measure the motion of the vibrating body relative to its vibration reference point, and the latter is used to measure the motion of the vibrating body relative to the ground or inertial space. Absolute vibration sensors are also called inertial vibration sensors because they contain inertial masses inside.

Although the principle and structure of various inertial vibration sensors are different, they all have one thing in common, that is, the base of the sensor is fixed on the vibrating body to be measured, and there is a mass block inside the sensor, and the mass block is passed through a spring or other The elastic body is connected with the base of the sensor, and the absolute motion of the vibrating body drives the relative motion between the mass block and the base through the spring, and its relative motion is damped by the damper inside the sensor. The inertial motion system is composed of mass block-spring-damper.

Patent Document 1 described below discloses a vibration sensor based on the principle of magnetic levitation. The following method is shown in this document: one permanent magnet is suspended above another magnet, and the magnetic field directions of the two permanent magnets are opposite, the lower magnet is fixed on the vibrating body under test and the external vibration is induced, and the coil is fixed on the vibrating body. On the sensor, and place one end face of the levitating magnet in the middle of the coil. When the sensor senses external vibration, the magnetically suspended magnet moves relative to the magnet fixed in the sensor, and the coil generates an induced electromotive force proportional to the vibration speed.

In addition, in Patent Document 2 shown below, the following structure is shown: it is mainly composed of a housing and its built-in sensing elements and control circuits, and the housing is composed of two cylinders with semicircular grooves It is formed by butting with each other, and the sensing element clamped on the mutual butting surfaces of the two cylinders divides the shell into two hemispherical chambers, and in each of the two chambers, an equal number of steel balls are placed. When vibration occurs, the vibration data can be detected by the built-in sensor device.

Patent document 1: Chinese patent "vibration sensor based on the principle of magnetic levitation", patent number 200520047887.6.

Patent Document 2: Chinese Patent "Universal Vibration Sensor", Patent No. 97226930.4.

By adopting the above structure, the vibration state in the horizontal or vertical state can be measured, but when the vibration occurs, the signal obtained by the traditional inertial electromagnetic detection method is weak, and it is an analog signal, which needs to be processed by a complex amplifier circuit to obtain data. For the inner ball detection device, since the position of each ball is difficult to accurately correspond to the vibration direction when each ball rolls, the number of sensor devices also has a great influence on the accuracy of the result.

Contents of the invention

The present invention is proposed in view of the above problems, and the purpose is to provide a vibration sensor that can detect vibration signals in four directions, which will not reduce the sensitivity of detecting vibration, and can directly obtain digital signals, and the signal processing circuit is simple.

In order to achieve the above object, the technical solution adopted in the present invention is: a kind of inner ball type vector vibration sensor is provided with four through holes in a hollow non-insulated sphere spherical container, four apexes of a regular pyramid are formed between the four through holes, four The cylindrical point-touch sensors are respectively fixed in the two through holes. The structure of the point-touch sensors is as follows: the hexagonal head bolt can connect the external lead wire contacts and hang into the point-touch sensor, and the top of the collision connecting rod is fixed with the top of the supporting spring , the bottom of the collision connecting rod is fixed with the hook ring of the collision connecting rod, and the bottom of the connecting rod support spring is fixed with the bottom of the touch sensor. The spherical vibrator is placed in the spherical insulating shell, and there are four vibrator connecting lines of the same length to connect the vibrator with the shackle of the collision connecting rod.

1. In the above scheme, when the collision connecting rod is not under tension, it is pushed to the contact point at the bottom of the hexagon head bolt under the action of the connecting rod supporting spring. When the collision connecting rod is under tension, the elastic force of the connecting rod supporting spring Be sure to leave the contact on the bottom of the hex head bolt.

2. In the above scheme, the spherical vibrator charges the vibrator through the wire introduced from the outside of the non-insulated spherical container.

3. In the above scheme, through the combination of 16 kinds of digital signals of four point-touch sensors in space, the detection of 16 directions can be realized theoretically.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

1. Due to the adoption of the present invention, a suitable voltage is placed on the spherical vibrator, and when the vibrator vibrates, the four point-touch sensors can directly obtain obvious digital signals, so that the corresponding signal processing circuit omits the signal amplification part, thereby The production cost is reduced, the sensitivity is also improved, and the reliability of the system is improved.

2. Since the action of the collision connecting rod caused by the vibration of the charged spherical vibrator is shielded by the insulating shell, the explosion-proof performance of the system is superior.

3. The present invention has simple structure and convenient manufacture.

Description of drawings

The embodiment of the present invention is described in detail below based on the accompanying drawings, in the accompanying drawings:

Accompanying drawing 1 is a sectional view of three point-touch sensors distributed in a plane.

Accompanying drawing 2 is the structural diagram of point touch sensor.

Accompanying drawing 3 is the spatial distribution diagram of four point-touch sensors in the spherical shell.

In the above drawings: 1. Hexagon head bolt; 2. Collision connecting rod; 3. Connecting rod support spring; 4. Insulation shell; 5. Collision connecting rod hook; 7. Spherical vibrator; 8. Vibrator connection;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

With reference to the accompanying drawings, the present embodiment sets four through holes in a hollow non-insulated sphere spherical container, four apexes of a regular quadrangular pyramid are formed between the four through holes, and cylindrical point-contact sensors 6 are respectively fixed in the four through holes, The structure of the point-touch sensor 6 is as follows: the hexagon head bolt 1 can be connected to the contact piece of the external lead wire (not shown in the figure) and suspended into the point-touch sensor 6, and the top of the collision connecting rod 2 is fixed with the top of the connecting rod support spring 3. The bottom of the connecting rod 2 is fixed with the shackle 5 of the collision connecting rod, and the bottom of the connecting rod support spring 3 is fixed with the bottom of the touch sensor 6 . When the collision connecting rod 2 is not under tension, under the action of the connecting rod supporting spring 3, it pushes against the contact point at the bottom of the hexagon head bolt 1. When the collision connecting rod 2 is under tension, the elastic force of the connecting rod supporting spring 3 must be guaranteed Can leave the contact on the bottom of the hex head bolt 1. The spherical vibrator 7 is placed in the spherical insulating shell 4, and there are four vibrator wires 8 of the same length to connect the vibrator 7 with the shackle 5 of the collision link. The spherical vibrator 7 electrifies the vibrator 7 through the wire introduced from the outside of the non-insulated spherical container.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot therefore limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention fall within the protection scope of the present invention.

Claims (3)

1. inside sphere type vector vibration transducer; It is characterized in that four through holes being set at a hollow on-insulated spheroid spherical container; Four summits of positive rectangular pyramid have been constituted between four through holes; Difference fixed leg form point touch sensor (6) in four through holes; Spherical oscillator (7) places in the spherical insulation crust (4), has four oscillator lines (8) with length that oscillator (7) is connected with collision connecting rod hook ring (5), and spherical oscillator (7) makes spherical oscillator (7) charged through the outside lead of introducing of on-insulated spherical container.

2. inside sphere type vector vibration transducer as claimed in claim 1; It is characterized in that point contact type sensor (6) structure is: hexagon head bolt (1) can connect the outside lead contact and be hung into point contact type sensor (6); The top of collision connecting rod (2) top and link supports spring (3) is fixed; Collision connecting rod (2) bottom is fixing with collision connecting rod hook ring (5), and the bottom of the bottom of link supports spring (3) and point contact type sensor (6) is fixed.

3. inside sphere type vector vibration transducer as claimed in claim 1; It is characterized in that at collision connecting rod (2) when not receiving pulling force; On the contact of pushing up hexagon head bolt (1) bottom under the effect of link supports spring (3); When receiving pulling force, the elastic force size of link supports spring (3) will guarantee to leave the contact of hexagon head bolt (1) bottom at collision connecting rod (2).

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