CN2296528Y

CN2296528Y - Elastomer of strain force measuring sensor

Info

Publication number: CN2296528Y
Application number: CN 97212566
Authority: CN
Inventors: 张守权
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-19
Filing date: 1997-03-19
Publication date: 1998-11-04
Anticipated expiration: 2007-03-19

Abstract

The utility model provides an elastomer of a strain force measuring sensor. A plurality of sensing units composed of three holes parallel to each other and having same depths are arranged on the direction of a metal elastomer 1 perpendicular to acting force, one of holes is a large hole 2, the large hole and two small holes 3 are distributed in the shape of a triangle, and the inner wall of the large hole 2 in each sensing unit is pasted with not less than one strain foil 4. A sensing device made of the utility model has the advantages of low height, light weight, high precision and strong eccentric load, shock load and overload resisting capabilities and can work under harsh environment for a long term. The utility model is mainly used for measuring the rolling force or large force values of rolling mills.

Description

The elastic body of strain-type force sensor

The utility model relates to a kind of elastic body of strain-type force sensor, particularly a kind of elastic body that is applicable to rolling force sensor or is worth sensor energetically.

At present, general both at home and abroad roll-force or big force measurement adopt in the sensor of strain principle, and its elastic body mostly is round, ring-like greatly and the square type (principle of strain gauge transducer and using referring to Yuan Xiguang chief editor, " sensor technology handbook, national defence publishing house, in Dec, 1986 first published).The circular ring type sensor is generally pasted many foil gauges in elastomeric surfaces externally and internally centre, form resistance bridge according to certain rules, when sensor was stressed, the foil gauge resistance value changed, then the output current of electric bridge or voltage change, thereby measure the size of power.The column type sensor is then pasted foil gauge at the elastomeric outside surface of column type.These two kinds of sensors are when being used for measurement of rolling force, owing to be subjected to the restriction of milling train installing space, highly very low, be generally 70～120mm, it is (non-linear: 1～5%F.S, hysteresis: 0.5%F.S, repeatability: 0.5%F.S) the bigger problem of influence to the precision of sensor to exist unbalance loading.

The purpose of this utility model is to provide a kind of elastic body of strain-type force sensor, is used for replacing existing rolling force sensor or is worth elastic body in the sensor energetically, to alleviate the influence of unbalance loading to low clearance force cell precision.

The purpose of this utility model is to realize like this, on the direction of metallic elastic body perpendicular to acting force, be provided with a plurality of and sensing units that hole that the degree of depth identical form parallel to each other by three, one of them hole is macropore (paster hole), and is in triangular distribution with two apertures (strain bore).The stickup of the inwall of macropore is no less than a foil gauge and is used to measure elastomeric strain in each sensing unit.

Can make various forms of force cells as required with elastic body of the present utility model, as ring-like, collar plate shape, square type and ladder type etc., and the sensor of making have highly low, in light weight, precision is high (non-linear:＜0.5%F.S, hysteresis:＜0.3%F.S, repeatability:＜0.1%F.S), anti-bias load, shock load ability be strong, anti-overload ability is strong, (for example: high temperature be suitable in rugged surroundings, oil, water logging bubble etc.) use the characteristics that the life-span is long.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a structural principle synoptic diagram of the present utility model;

Fig. 2 is the paster hole diagrammatic cross-section of Fig. 1;

Fig. 3 is a ring-like elastomeric structural representation of the present utility model;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the elastomeric structural representation of square type of the present utility model;

Fig. 6 is the vertical view of Fig. 5;

Fig. 7 is a round elastomeric structural representation of the present utility model;

Fig. 8 is the vertical view of Fig. 7.

As shown in Figure 1, 2, principle of the present utility model is: do the time spent when the elastic body 1 of force cell is subjected to press to up and down power F, in each sensing unit macropore 2 about surperficial compression chord, at these two position paster group bridges, can measure the size of suffered stress.And the paster hole 2 on the sensor elastomer is many more, and the foil gauge of pasting in the hole 4 is many more, and then all pressures effect of sensor is good more.Then unbalance loading is more little to the influence of sensor.Macropore 2 is used to adjust sensitivity with aperture 3 spacings, and spacing is big more, and sensitivity is big more.

As Fig. 3, shown in 4, the ring-like elastic body 1 of sensor is formed by metallic elastic materials processing, overall dimensions are decided by the space at the concrete use position of milling train or other use occasion and the size of dynamometry value, around ring-like elastic body 1, evenly process n (n=1,2,3,) sensing unit, each sensing unit is made up of and hole (being paster hole 2 and strain bore 3) that the degree of depth is identical parallel to each other perpendicular to three of the orientation of its axis center of circle of the direction of acting force and macropore 2, in paster hole 2, be no less than a foil gauge 4 near posting on the inwall of two strain bores, 3 one sides, and connect on request, form bridge circuit with other sensing unit of sensor then.Seal pad 5 is used for preventing that sealing, oil, vapour enter sensor.

Shown in Fig. 5,6, at n (n=1 of the middle part of square type (long strip type) elastic body 1 one sides processing, 2,3, ...) sensing unit, the paster hole 2 of each sensing unit and strain bore 3 are all parallel to each other and the degree of depth is identical, paste one or more foil gauges 4 in each paster hole 2, and connection group bridge, can constitute square type sensor elastomer.

Shown in Fig. 7,8, evenly n of processing around round elastic body 1 (n=1,2,3 ...) the elasticity sensing unit, its job operation and circular ring type elastic body are similar, and the size of circle determines according to the dynamometry value is big or small.The axis normal in paster hole 2 is in being subjected to force direction (just being parallel to stress surface), and by the center of circle, or point to the center of circle.All the other and circular ring type elastic body are similar.

Paster hole 2 in above-mentioned elastomeric each sensing unit and strain bore 3 can be arbitrary shape (square, oval, circle all can), but with circular effect is best, usually, the diameter in paster hole 2 is 10～15mm, the diameter of strain bore 3 is 5～7mm, it is distributed as with paster hole 2 is the isosceles triangle on top, and the line of centres of two apertures 3 perpendicular to or be parallel to the direction of acting force, the number of sensing unit is good with even number.

Claims

1, a kind of elastic body of strain-type force sensor, it is characterized in that on the direction of metallic elastic body (1) perpendicular to acting force, be provided with a plurality of and sensing units that hole that the degree of depth identical form parallel to each other by three, one of them hole is macropore (2), and is in triangular distribution with two apertures (3).

2, the elastic body of strain-type force sensor according to claim 1 is characterized in that the inwall stickup of the macropore (2) in each sensing unit is no less than a foil gauge (4).

3, the elastic body of strain-type force sensor according to claim 1 is characterized in that becoming between macropore (2) and two apertures (3) in each sensing unit isosceles triangle to distribute, and is the top of isosceles triangle with macropore (2).

4,, it is characterized in that the hole in each sensing unit is circular hole according to the elastic body of claim 1,3 described strain-type force sensors.

5,, it is characterized in that the line of centres of two apertures (3) in each sensing unit should be parallel or perpendicular to the direction of acting force according to the elastic body of claim 1,3 described strain-type force sensors.

6, the elastic body of strain-type force sensor according to claim 4, the diameter that it is characterized in that macropore in each sensing unit (2) is more than or equal to two times of the diameter of aperture (3).

7, the elastic body of strain-type force sensor according to claim 2 is characterized in that in the macropore (2) at each sensing unit, is no less than a foil gauge (4) near pasting on the inwall of two apertures (3) one sides.