CN201152750Y

CN201152750Y - Positioning apparatus for reciprocating rectilinear movement objects

Info

Publication number: CN201152750Y
Application number: CNU2007201950312U
Authority: CN
Inventors: 杰克陈
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-14
Filing date: 2007-11-14
Publication date: 2008-11-19
Anticipated expiration: 2017-11-14

Abstract

The utility model discloses a positioning device used for an object in a reciprocating linear motion, comprising two magnetic induction sensors and a magnetic substance, wherein, the two magnetic induction sensors are respectively arranged at the positions with same height above the moving object, the magnetic substance is arranged on the moving object; moreover, the two magnetic induction sensors are positioned within the range that the magnetic substance moves with the moving object in order to ensure that the two magnetic induction sensors induct an integrated magnetic filed signal in the range. The positioning datum mark position obtained by utilizing the positioning device can not vary with the changes of the external environment, thereby having high positioning accuracy and being widely applied to the positioning of the object in the reciprocating linear motion.

Description

The locating device that is used for reciprocating type rectilinear movement object

Technical field

The utility model relates to a kind of locating device that is used for reciprocating type rectilinear movement object, particularly a kind of locating device of contactless reciprocating type rectilinear movement object.

Background technology

Making the object of oscillating rectilinear motion, can be the brake rod of step motor, also can be the drive link on the conveying belt, can also be the push rod of cylinder.When doing reciprocating, operating personnel must know its accurate run location, so that control it.

To the multiple technologies that are positioned with of the object of making oscillating rectilinear motion, a kind of is to be the position that object in the motion is detected on the basis with photoelectric effect in the market.Specific implementation method is a (see figure 1): add a label 12 on the object 11 of making oscillating rectilinear motion, by external light source 13 light is penetrated on this label 12, then come the movement position of this label 12 of perception again by the optical sensor 14 of fixing installing.When the label on the object 11 12 arrived the position of optical sensor 14, optical sensor was the in-position of induced indicia thing.This class utilizes the method existing problems of light-seeking to have: because of its preparation technology is complicated, and the maintenance cost height.In addition, photo-detector is when the snoop tag thing, because of illumination has an intensity distributions scope, so the light that photo-detector can be sensed also has certain width range, so the deviation of being positioned with.

Also having a kind of is to come the perception magnetic bodies by single magnetic induction sensor, the concrete practice is a (see figure 2): magnetic thing 22 is fixedly mounted on the object 21 in the oscillating rectilinear motion that desire measures, in addition installing one magnetic induction sensor 23 directly over magnetic thing 22; When the magnetic thing on the object 21 22 arrived the position of magnetic induction sensor 23, magnetic induction sensor was the position of this object of perception.Along with the increase of object oscillating rectilinear motion number of times, the frictional heat of object raises its temperature, and the variation that brings the magnetic field size of magnetic bodies thus is so its induced signal of sensing drifts about and can not accurately locate.

The utility model content

The technical problems to be solved in the utility model provides the locating device that is used for reciprocating type rectilinear movement object, this device bearing accuracy height, and can guarantee that the safety of moving object moves.

For solving the problems of the technologies described above, the locating device that is used for reciprocating type rectilinear movement object of the present utility model, comprise two magnetic induction sensors and a magnetic thing, two magnetic induction sensors separately are installed in sustained height place, moving object top, the magnetic thing is installed in the moving object, and two magnetic induction sensors all are positioned at the scope that the magnetic thing moves with moving object.

It is synchronous that the induced signal of sensing because of two magnetic induction sensors in the utility model changes, promptly broaden simultaneously or narrow down, guaranteed that the point midway between two induced signals is constant, thereby avoided magnetic field in original technology to vary with temperature the zero point drift phenomenon of generation, guaranteed the accuracy of null position.And the utility model also can by moving object from middle during toward the edge during motion this information of closing of magnetic induction sensor judge the direction of motion that changes moving object, to guarantee the safe operation of object.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Fig. 1 is the method synoptic diagram that utilizes optical sensor setting movement object;

Fig. 2 is the method synoptic diagram that utilizes single magnetic induction sensor setting movement object;

Fig. 3 is a locating device synoptic diagram of the present utility model;

Fig. 4 is a locating device work synoptic diagram of the present utility model.

Embodiment

Fig. 3 is shown as locating device synoptic diagram of the present utility model, comprises moving object 31, on establish magnetic thing 32, and two magnetic induction sensor A and B.Fig. 4 has provided locating device work synoptic diagram of the present utility model, in the moving object 31 of making oscillating rectilinear motion, establish a magnetic thing 32, the sustained height place separately fixedly installs two magnetic induction sensor A and B (can be existing any one model) above this magnetic thing 32 simultaneously, the position of magnetic induction sensor A and B is arranged in the scope that magnetic thing 3 moves with moving object 31, and Ying Yineng guarantees that can sense complete field signal at magnetic thing 32 in the moving range of moving object 31 is as the criterion.According to moving of moving object 31, three kinds of positions as described in Figure 3 can appear: position 1, magnetic thing 32 be positioned at magnetic induction sensor A under, this moment, magnetic induction sensor A sensed magnetic field; Position 2, magnetic thing 32 are positioned in the middle of two magnetic induction sensors, do not sense magnetic field; Position 3, magnetic thing 32 be positioned at magnetic induction sensor B under, this moment, magnetic induction sensor B sensed magnetic field.Magnetic thing 32 can paste on the object 31 with adhesive sticker, also can snap on the object 31 with the mode of screens.

Next be according to the induced signal compute location reference point So that senses.Consider that changes of magnetic field that is subjected to ectocine magnetic thing and the induced signal of sensing have certain width, half exportable induced signal of oscillation cycle has two kinds of situations: signal occurs simultaneously and signal does not occur simultaneously.The common factor situation occurs in the magnetic field intensity of magnetic thing when big, the induced signal broad that two magnetic induction sensor A and B sense respectively, two signals are at the part location overlap, promptly in the magnetic field that two the magnetic induction sensor A in some position and B sense magnetic thing 32 simultaneously, at this moment positioning reference point position is: So=(Sa2-Sb1)/2.Magnetic field not the common factor situation occur in the magnetic thing magnetic field intensity hour, the induced signal that two magnetic induction sensor A and B sense respectively is narrower, two signals are separated, at this moment positioning reference point position is: So=(SA2-SB1)/2.It should be noted that the position of reference point So is fixed under above-mentioned two kinds of induced signal situations, also is the point midway of the spacing between magnetic induction sensor A and the B.By the positioning reference point that aforementioned calculation goes out, can accurately locate object.For the accuracy that guarantees to locate, the regularly check and correction of positioning reference point can be set.

Locating device of the present utility model, can be by the position of two magnetic induction sensors be arranged on the inward flange of magnetic thing moving range as far as possible, guarantee that magnetic induction sensor cuts out or the open site at the inward flange of magnetic thing moving range, by closing of magnetic induction sensor as basis for estimation, change movement direction of object, because of moving object has a safety movement scope of determining, to guarantee the safety movement of object.In concrete the enforcement, referring to Fig. 3, when moving object 31 is moved from left to right, magnetic thing 32 is near the position of magnetic induction sensor B, and magnetic induction sensor B opens, i.e. Sb1 point or SB1 point, because of existing certain limit, magnetic field exists, continue the motion magnetic induction sensor and will continue to open the influence value that is lower than magnetic induction sensor B up to magnetic field intensity, magnetic induction sensor B closes at Sb2 point or SB2 point, at this moment changes the direction of motion of moving object 31; Same, moving object 31 is from right during toward left movement, magnetic induction sensor A when Sa1 point or SA1 point are closed, the direction of motion of change moving object 31.

Claims

1, a kind of locating device that is used for reciprocating type rectilinear movement object, it is characterized in that: this device comprises two magnetic induction sensors and a magnetic thing, described two magnetic induction sensors separately are installed in sustained height place, moving object top, described magnetic thing is installed in the described moving object, and two magnetic induction sensors all are positioned at the scope that described magnetic thing moves with described moving object.