CN87205960U

CN87205960U - Vibration system type electrical logging sensor

Info

Publication number: CN87205960U
Application number: CN 87205960
Authority: CN
Inventors: 黄玲; 刘衡
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-03-30
Filing date: 1987-03-30
Publication date: 1988-01-06

Abstract

The utility model discloses a vibration system type electrical logging sensor, which belongs to the sensor of electrical logging system for detecting acceleration, impact and vibration. The vibration system type electrical logging sensor is composed of a shell (1), a quality block (4), an elastic element (3), a conductive rod (7) and a limiting element (5). When the shell is subjected to a vibration, the quality block generates a displacement to make the conductive rod and the limiting element contacted, and a pulse signal is output to displaying or controlling. Compared with the well-known sensor, the utility model has the advantages of simple signal processing device, minimal power consumption, simple as well as flexible and various structure, small size, low cost, low installing requirement.

Description

Vibration system type electrical logging sensor

The utility model is the sensor about electric measuring system, particularly about the sensor of mechanical quantity such as sense acceleration, impact, vibration.

Some engineering goods is when check, need detect some fixing mechanical quantity, such as gauge, feeler gauge etc., and for acceleration, impact, the detection of mechanical quantity such as vibration, be extensive use of the electric measuring system of non electrical quantity, sensor according to the disclosed electric measuring system of " non-electrical quantity measurement technology " (China Machine Press), the vibrational system of forming by mass and flexible member, and the strain gauge element of settling on flexible member constitutes, it is output as simulating signal, must add metering circuit, amplifier, indicator etc., when being used for that above-mentioned mechanical quantity is surpassed or when being lower than the detection of predetermined value, seem complicated and economical inadequately, limited its usable range, simultaneously for having relatively high expectations of installing.

Be: design a kind of sensor cheap, flexible and convenient to use order of the present utility model, its effect is equivalent to the measurer of fixed amount limit, can surpass or be lower than predetermined value mechanical quantity such as acceleration, shock and vibration and detect, and can utilize the pulse signal of sensor output to do to show and control.

This sensor has a base plate or housing, and one or more vibrational systems that are made of mass and flexible member are arranged on the base plate, also has the limit element of the conduction of one or more and mass mutually insulated.Limit element is placed on the direction of mass movement locus, and is predetermined with mutual edge distance mutually between mass.It is right that mass and limit element have constituted contacting of conduction.When static, when the rigidity of the quality of the damping of vibrational system, mass, flexible member is a determined value, mass is the corresponding predetermined values of mechanical quantity such as acceleration, impact, vibration with distance between limit element: for given vibrational system, adjust mass and the mutual distance of limit element, promptly changed the predetermined value of sensor.When housing (being measured piece) is subjected to acceleration, impact or vibration, mass produces displacement with respect to housing, when being equal to or greater than predetermined value as above-mentioned amount, mass will produce big displacement and contact with limit element, export a pulse signal, be equipped with suitable trigger circuit, can show, control or detect.

Further improvement of the utility model is: the one or more conducting rods that stretch along its free end of adjunction on vibrational system, this moment, the free end and the limit element of conducting rod constituted when electrically contacting.This conducting rod is used to amplify the displacement of mass, and enlargement factor is determined by its length.Like this, under the condition of identical sensitivity, the volume-diminished of sensor.

Another improvement of the present utility model is: when detecting vibration, limit element is changed into by flexible member or vibrational system supporting, all places in the time of can adapting to the housing installation like this.If flexible member is pressed suitable bending curvature, or flexible member is bent into suitable angle by proper proportion, the position when so not only housing is installed is unrestricted, can also detect from the vibration on any direction.

Flexible member in the sensor can be a shape, spiral helicine, uniform cross section is shaft-like or the spring of sheet, also can be the equal strength spring.Its material can also be with rubber or conductive rubber, rubber-like plastics etc. except that metal.Limit element can be made different shape according to different use needs with conductive material, can also make adjustable.Mass can be made on conducting rod or flexible member removable adjustment, can regulate the natural frequency of vibrational system.

The form of the composition of sensor is actually according to different request for utilizations, and above-mentioned each feature is carried out different combinations.

The utlity model has simple in structure, volume is little, installation requirement is not high, the characteristics of intuitive display, is applicable to aspects such as the examination and test of products, teaching demonstration, military affairs, security personnel, also can be used for the record analysis of collision accident.Be used for acceleration, impact.Mechanical quantity such as vibration surpass or when being lower than the detection of predetermined value, less demanding to the installation site of sensor, antijamming capability is strong; Because output is the signal of switching value, for showing and control that external circuit is extremely simple, minimal power consumption in the time of can accomplishing no signal, be specially adapted to the occasion of the necessary long-term work of multiple point remote measurement and power supply, and owing to the value with widespread use with low cost.

The utility model has following embodiment sketch:

Fig. 1. a kind of stereographic map of sensor.On insulating base 2, be fixed with two limit elements 5, and three vibrational systems 6 that constitute by mass 4 and flexible member 3, such sensor has three predetermined values.When power F such as the acceleration that is parallel to base plate 2, impact, vibration act on base plate 2, mass just produces displacement in the direction of arrow, and successively contact with limit element 5, on its extension line 8, connect respectively to trigger display circuit, can demonstrate F and be higher than a certain predetermined value or be lower than a certain predetermined value, and can show the interval time of two pulse signals.

Fig. 2. a kind of stereographic map of sensor.Eight same limit elements 5 are arranged on insulating base 2, and by the preset distance mutual insulating be distributed on vibrational system 6 around.Because the cross section of flexible member 3 is circular, sensor can predict the predetermined value from the acceleration that is parallel to base plate 2 any directions, shock and vibration, and can predict its direction.

Fig. 3. a kind of synoptic diagram of sensor, wherein limit element 5 and vibrational system 6 are stereographic map.Be fixed with three circular limit elements 5 in the housing 1, they have different separately predetermined diameters, and when housing 1 is subjected to time spent of doing of power F, the mass 4 that conductive rubber is made produces displacements, and contacts with limit element, and the predetermined value of three class can be arranged.Owing to adopted an axle shape flexible member 3, to being parallel to the power F in the plane with flexible member 3 axis normal, identical sensitivity is arranged all, therefore only a plane there is requirement when mounted.

Fig. 4. a kind of synoptic diagram of sensor.Limit element 5 with gradual change diameter, removable on the axis direction of flexible member 3 or conducting rod 7, can adjust the preset distance of 7 of limit element 5 and mass 4 or conducting rods.

Fig. 5. a kind of synoptic diagram of sensor.Four rubber-like conducting rods 7 are arranged on mass 4, be in respectively in the limit element 5 of four different-diameters, this sensor has four predetermined values.

Fig. 6. a kind of synoptic diagram of sensor, wherein insulator 9 is a sectional view.One elastic conduction bar 7 is arranged on vibrational system 6, the limit element 5 of a plurality of different-diameters is arranged on the insulator 9.What limit elements this sensor has, and what predetermined values are just arranged.When limit element 5 adopts conductive rubber, be very easy during fabrication.In order to adjust the natural vibration frequency of vibrational system 6, mass 4 is fixing after can moving on flexible member 3 or conducting rod 7 and adjusting.

Fig. 7. the sectional view of sensor.Label 3 be a shape flexible member, the one end is fixed on the housing 1, the other end is a spherical mass 4, and a flexible thinner conducting rod 7 is arranged on it, and is positioned at the center of limit element.Limit element 5 can move along the axis direction adjustment with screw rod 10.Limit element is made of insulator 9 and a plurality of electrode 13 and extension line 8 thereof, and the section of its hollow space is the bent frustum of a cone, and a plurality of distribution of electrodes is arranged in its surface.Electrode is being arranged with the plane higher slice of conducting rod axis normal, and the electrode of each layer is all staggered mutually at axis direction.This sensor not only can predict the size of power F, can also measure its direction.The protecting component 11 of insulation is positioned on the direction of mass 4 movement locus, and the top layer 12 of its conduction has constituted a limit element 5, demonstration when can be used for transfiniting or warning.

Fig. 8. a kind of synoptic diagram of sensor.This sensor has flexible member 3 crooked or bending, and such structure makes it to detect the power F from any direction.

It below is the sensor that is used to detect vibration.

Fig. 9. a kind of synoptic diagram of sensor.The limit element 5 has here also adopted flexible member 3 supporting, even when base plate 2 is perpendicular to the ground, the precision that institute's vibration measuring is moved is also unaffected.

Figure 10. a kind of synoptic diagram of sensor.The limit element 5 here is to support with vibrational system 6, because the amplification of conducting rod 7 can predict fainter vibration.

Figure 11. a kind of synoptic diagram of sensor.This sensor since flexible member 3 all by bending or bending, so can predict from the vibration on any direction.

Claims

1, the sensor of electric measuring system is the sensor that is used for mechanical quantity such as sense acceleration, impact, vibration, especially for detecting the sensor that above-mentioned mechanical quantity surpasses or be lower than predetermined value.This sensor has a housing 1 or base plate 2, the vibrational system of forming by a flexible member 3 and mass 46 wherein, it is characterized in that: on the direction of mass 4 movement locus, limit element 5 with mass 4 mutually insulateds is installed, and has electrically contacting of preset distance right each other when being formed in static state with mass 4.

2, according to the sensor of claim 1, it is characterized in that: on the direction of mass 4 movement locus, one or more limit elements 5 are installed.

3, according to the sensor of claim 2, it is characterized in that: one or more limit elements 5 that the vibrational system axis moves that are parallel to are arranged.

4, according to the sensor of claim 1, it is characterized in that: on vibrational system 6, have one or more that stretch along its free end direction and constitute with limit element 5 and to electrically contact right conducting rod 7.

5, according to the sensor of claim 4, it is characterized in that: have and on flexible member 3 or conducting rod 7, to adjust the mass 4 that moves.

6, according to the sensor of claim 4, it is characterized in that: on the direction of conducting rod 7 movement locus, one or more limit elements 5 are installed.

7, according to the sensor of claim 6, it is characterized in that: one or more limit elements 5 that conducting rod 7 axis move that are parallel to are arranged.

8, according to the sensor of claim 1 to 7, it is characterized in that: have limit element 5 with flexible member 3 or vibrational system 6 supportings.

9, according to the sensor of claim 8, it is characterized in that: have flexible member 3 one or more bendings or bending.

10, according to the sensor of claim 9, it is characterized in that: each flexible member 3 all is crooked or bending.