CN100342247C - Probe needle device - Google Patents
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- CN100342247C CN100342247C CNB2005100662544A CN200510066254A CN100342247C CN 100342247 C CN100342247 C CN 100342247C CN B2005100662544 A CNB2005100662544 A CN B2005100662544A CN 200510066254 A CN200510066254 A CN 200510066254A CN 100342247 C CN100342247 C CN 100342247C
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Abstract
To provide a meter reading device capable of preventing detection sensitivity from becoming different, depending on the position of a metal piece existing in a hollow part, and capable of enhancing noise-proofness so as not to be affected by the disturbance noise at the outside of the hollow part, when detecting foreign matters. This meter reading device is constituted to pass an inspected object through the hollow part 2 provided in the central part of an inspection part 1 and is provided with the first coil body 10 arranged in the inspection part 1, a direct current magnetic field generation part 20 arranged opposite to the first coil body 10 with the hollow part 2 therebetween, and the second coil body 30 arranged in the direct current magnetic field generating part 20.
Description
Technical field
The present invention relates to be used to detect the probe needle device of sewing product etc.
Background technology
Probe needle device is by sewing products (checked property) such as dress ornament, bed clothes being moved in a certain direction, utilize the disorder of sneaking into the magnetic field of sheet metal in the checked property, detecting other metallic foreign bodies such as the sewing needle that fractures, the sewing needle of forgeing, staple.
Probe needle device is as the checking ability of inspection portion, can check out other metal species foreign matters such as the sewing needle that fractures, the sewing needle of forgeing, staple fully, simultaneously, when the object beyond the foreign matter that not influenced by external interference passes through, still has the ability of examining pin.
Figure 12 is the synoptic diagram of original probe needle device of seeing from the top of expression.The structure of original probe needle device 900 is that travelling belt 950 is by being arranged on the hollow bulb in the inspection portion 901.
On this travelling belt, carry checked property, in hollow bulb, move, when having sheet metal, send detection signal in checked property inside along the x direction by making it.Inspection portion 901 is provided with the oval-shaped coil that twines by single direction.
For original probe needle device, the problem of existence is can not correctly find out hard goods to bury the position in sewed product.For this reason, in view of this problem, the probe needle device (opening flat 5-40895 communique in fact with reference to Patent Document 1-) of Patent Document 1 has been proposed.
Structural outline figure in the inspection portion of the x direction of this probe needle device as shown in figure 13.The probe needle device of Figure 13 is equipped with the magnet 820 that is used to detect the coil groups 810 of sheet metal and is used to produce fixed magnetic field in inspection portion 801.
Coil groups 810 is to constitute like this, make coil 815 in the middle of being configured in, be configured in its both sides and winding direction and coil 815 opposite to two series of coils 814,816 carry out parallel connection, three coils 814,815,816 are configured on the moving direction x of checked property.
Moving of corresponding sheet metal, coil case 810 goes out the rate of change of the quantity of magnetism number of interlinkage based on the change-detection of magnetic flux density, produces output voltage.
Yet, for original probe needle device, be the sheet metal of Φ 0.5 for example near detection sensitivity coil or coil groups, can detect the sheet metal of Φ 1.0 so at a distance at most in coil or coil groups.So, owing to be present in the interior sheet metal position difference of hollow bulb, and the also different problem of detection sensitivity still exists.
On the other hand,, also can produce reaction, be subjected to the influence of ambient noise, when not having foreign matter to sneak into, can produce the problem of error-detecting because whole inspection sensitivity improves for the changes of magnetic field beyond the hollow bulb if improve the detection sensitivity of inspection portion.
Summary of the invention
The present invention is the technical scheme that proposes in view of above problem points, its objective is provides a kind of when carrying out the foreign matter detection, prevent the difference that detection sensitivity produces because of the position that is present in the sheet metal in the hollow bulb, simultaneously, realize to improve anti-noise, be not subjected to the probe needle device that ambient noise influences beyond the hollow bulb.
This programme 1 described probe needle device is characterized in that: make checked property by the probe needle device that the hollow bulb that is positioned at central authorities of inspection portion constitutes, possess: be configured in the 1st coil groups in the described inspection portion; Clamp described hollow bulb and be configured in D.C. magnetic field generating unit with the opposite side of described the 1st coil groups; And the 2nd coil groups that is configured in this D.C. magnetic field generating unit.
This programme 2 described probe needle devices is characterized in that: in the probe needle device that this programme 1 is put down in writing, the 1st coil groups and the 2nd coil groups are equipped with 2 coils separately at least on the moving direction of checked property.
This programme 3 described probe needle devices is characterized in that: in the probe needle device of being put down in writing in this programme 2, D.C. magnetic field generating unit portion is made of the other permanent magnet corresponding to each coil.
This programme 4 described probe needle devices is characterized in that: in each probe needle device of putting down in writing, the D.C. magnetic field generating unit is made of the permanent magnet that has institute's fixed gap mutually, arrange on the direction vertical with the checked property moving direction in this programme 1～3.
This programme 5 described probe needle devices, it is characterized in that: in this programme 1～4 in each probe needle device of putting down in writing, clipping the 1st coil groups and the 2nd coil groups, a side opposite with the D.C. magnetic field generating unit, configuration can produce the 2nd D.C. magnetic field generating unit of the static magnetic field identical with the direction of the static magnetic field of this D.C. magnetic field generating unit generation.
Probe needle device of the present invention, because being present in hollow bulb increases away from flux of interlinkage under the situation of coil groups, when sheet metal exists in hollow bulb and sheet metal when not existing the variation of magnetic flux also increase, so can improve detection sensitivity and improve noise immunity.
Adopt the described probe needle device of invention of this programme 1, checked property is constituted by the hollow bulb that is positioned at central authorities of inspection portion, possesses the 1st coil groups that is configured in the described inspection portion, clamp described hollow bulb and be configured in D.C. magnetic field generating unit with the opposite side of described the 1st coil groups, and the 2nd coil groups that is configured in this D.C. magnetic field generating unit, increase away from flux of interlinkage under the situation of coil groups so be present in the hollow bulb, when sheet metal exists in hollow bulb and sheet metal when not existing the variation of magnetic flux also increase, thereby can improve detection sensitivity and improve noise immunity.
Adopt the described probe needle device of invention of this programme 2, except effect with probe needle device that this programme 1 put down in writing, because the 1st coil groups and the 2nd coil groups are on the moving direction of checked property, at least be equipped with 2 coils separately, so, can offset the magnetic flux change that causes because of the external interference noise, thereby realize excellent anti-noise effect.
Adopt the described probe needle device of invention of this programme 3, except effect with probe needle device that this programme 2 put down in writing, because the D.C. magnetic field generating unit is made of the other permanent magnet corresponding to each coil, so, the effect that fractures, damages that can prevent the D.C. magnetic field generating unit had.
Adopt the described probe needle device of invention of this programme 4, except effect with this programme 1～3 any one probe needle device of putting down in writing, because the D.C. magnetic field generating unit is made of the permanent magnet that has institute's fixed gap mutually, arrange on the direction vertical with the checked property moving direction, so, can on this vertical direction, be detected magnetic flux uniformly, thereby be had the effect that can prevent to detect error.
Adopt the described probe needle device of invention of this programme 5, except effect with this programme 1～4 any one probe needle device of putting down in writing, owing to clipping the 1st coil groups and the 2nd coil groups, a side opposite with the D.C. magnetic field generating unit, configuration can produce the 2nd D.C. magnetic field generating unit of the static magnetic field identical with the direction of the static magnetic field of this D.C. magnetic field generating unit generation, so, the magnetic leakage flux can be reduced, thereby detection sensitivity can be further improved.
Description of drawings
Fig. 1 is the stereographic map of expression probe needle device of the present invention.
Fig. 2 is the synoptic diagram that the inspection portion Inside coil of the probe needle device of expression the 1st embodiment disposes.
Fig. 3 is the broken sectional view of side stand in the inspection portion of probe needle device of the foregoing description.
Fig. 4 is the vertical view of row shape configuration of coil groups of inspection portion of the probe needle device of the foregoing description.
Fig. 5 is the circuit summary construction diagram of inspection portion of the probe needle device of the foregoing description.
Fig. 6 is the figure that expression detects output waveform in the probe needle device of the foregoing description.
Fig. 7 is the vertical view of coil configuration of the probe needle device of the 2nd embodiment that sees from the top.
Fig. 8 is the synoptic diagram of coil configuration of inspection portion inside of the probe needle device of expression the 2nd embodiment.
Fig. 9 is the D.C. magnetic field generating unit of inspection portion inside of probe needle device of expression the 2nd embodiment and the configuration vertical view of coil groups.
Figure 10 is the curve map of the probe needle device of the 2nd embodiment according to the detection sensitivity of the height between the coil groups.
Figure 11 is the vertical view of relation of the moving direction of the coil groups of probe needle device of expression the 2nd embodiment and checked property, Figure 11 (a) is expression and the figure of the coil groups of the moving direction x configured in parallel of checked property, and Figure 11 (b) is the figure of expression with respect to the coil groups of the moving direction x squint configuration of checked property.
Figure 12 is the synoptic diagram of original probe needle device of seeing from the top.
Figure 13 is the signal thought figure of coil configuration structure example of the inspection portion inside of the original probe needle device of expression.
Among the figure:
1-inspection portion, the 2-hollow bulb, 10,210-the 1st coil groups, 11,12,13,211, the 212-iron core, 14,15,15,214,215-coil, 20,220-D.C. magnetic field generating unit, 30,230-the 2nd coil groups, 34,35,36,234,235, the 236-coil, 40,240-the 2nd D.C. magnetic field generating unit, the 50-travelling belt, 100, the 200-probe needle device, A, B-support.
Embodiment
Below, utilize accompanying drawing to describe, but within the limit that does not exceed aim of the present invention, the present invention is not limited in the following stated embodiment to being used to implement optimal way of the present invention.
(embodiment 1)
Fig. 1 represents the stereographic map of one of face shaping example of probe needle device of the present invention.Among Fig. 1, the x axle is represented the moving direction of checked property, and the y axle represents and the Width of the hollow bulb 2 of the moving direction orthogonal directions of checked property that the z axle is represented the short transverse of hollow bulb 2.
As shown in Figure 1, probe needle device 100 is for to make travelling belt 50 by being arranged on the structure of hollow bulb 2 inside in the inspection portion 1, by checked property being carried on this travelling belt 50 and it being moved, when having sheet metal in the checked property, will send detection signal in hollow bulb 2.
Fig. 2 is the configuration schematic diagram of inspection portion 2 Inside coils of the probe needle device 100 of this form of implementation.
As shown in Figure 2, inspection portion 1 is made up of support A that constitutes the hollow bulb upside and the support B that constitutes the hollow bulb downside, and makes the shaped as frame shape that has hollow bulb 2 in central authorities.On support A, its inside is equipped with D.C. magnetic field generating unit 40, the 1 coil groups 10 and is arranged to hollow bulb one side contacts with D.C. magnetic field generating unit 40.
The opposing party, on support B, its inside is equipped with D.C. magnetic field generating unit 20, the 2 coil groups 30 and is arranged to hollow bulb one side contacts with D.C. magnetic field generating unit 40.
The 1st coil groups 10 by three be wound in cylindraceous, cored 11,12,13 coil 14,15,16 constitutes respectively, dispose being parallel on the moving direction x of checked property.Because coil groups the 10, the 30th is made of small-sized coil,, can suppress manufacturing cost to such an extent that support very much so make easily.
In addition, the end face of these three coils 14,15,16, in the same plane.The 1st coil groups 10 and the 2nd D.C. magnetic field generating unit 40, the so big size of support A of advancing original probe needle device with folding and unfolding is configured.
The 2nd coil groups 30 possesses the coil the same with the structure of the 1st coil groups 10 34,35,36.The 2nd coil groups 30 and the 2nd D.C. magnetic field generating unit 20, the so big size of support B of advancing original probe needle device with folding and unfolding is configured.
The 1st coil groups 10 and the 2nd coil groups 30 adopt coil 14,15,16 and coil 34,35,36 are disposed in the face-off mode that hollow bulb 2 is clipped in the middle.And the iron core 31 of the iron core 11 of the 1st coil case 10 and the 2nd coil case 30 is configured to concentric shape, and in addition, iron core 12 and iron core 32 also are configured to concentric shape.
And iron core 13 and iron core 33 also are configured to concentric shape.Therefore, the 1st coil groups 10 and 30 magnetic flux that pass through of the 2nd coil groups present linearity.
Fig. 3 is the sectional drawing of the broken support of inspection portion 1 upside of probe needle device 100.D.C. magnetic field generating unit 40, as shown in Figure 3, with the perpendicular y direction of checked property moving direction on, constitute by the tabular permanent magnet that forms one.
Fig. 4 is the vertical view of inspection portion 1 Inside coil group, the 10 row shapes configuration of expression probe needle device 100.In hollow bulb one side of D.C. magnetic field generating unit 40, as shown in Figure 4, with the coil 14,15,16 of the moving direction x configured in parallel of checked property with predetermined distance, with the perpendicular direction y of checked property on be the multiple row shape and arrange.
On the other hand, D.C. magnetic field generating unit 20 is made by permanent magnet, has the identical thickness of slab of thickness of slab with the D.C. magnetic field generating unit of being made by identical permanent magnet 40.
In addition, D.C. magnetic field generating unit 20 and 40 adopts common same polarity mode to dispose, that is, with the identical direction of static magnetic field based on the D.C. magnetic field generating unit 20 of passing through the 1st coil groups 10, the 2nd D.C. magnetic field generating unit 40 of static magnetic field takes place in configuration.
In hollow bulb one side of D.C. magnetic field generating unit 20, the same with D.C. magnetic field generating unit 40, the inscape coil 34,35,36 of the 2nd coil groups 30 with the perpendicular direction y of checked property moving direction on be the multiple row shape and arrange.
Have, the 1st coil groups 10 and the 2nd coil groups 30 are also clamped hollow bulb 2 on craspedodrome direction y again, and coil separately stands facing each other mutually, and the iron core separately of the coil of face-off disposes with concentric shape mutually.
Secondly, Fig. 5 is the circuit generalized schematic of the inspection portion 1 of probe needle device 100.What Fig. 5 showed is the circuit structure that is used for the output voltage of synthetic the 1st coil groups 10.In addition, the circuit structure of the 2nd coil groups 30 is identical with the circuit structure of the 1st coil groups 10.
For the 1st coil groups 10, as shown in Figure 5, the coil 14 and 16 that disposes in coil 15 both sides is connected in series, and is connected in parallel with the coil 15 that is positioned at the 2nd D.C. magnetic field generating unit 40 central portions on the x direction.
After the output voltage that coil 14 and coil 16 polyphones connect and the output voltage stack of coil 15, amplify, produce and detect output through not shown prime amplifier.Owing to have a plurality of coil groups in the y direction,, produce and detect output so these signals are exaggerated simultaneously.
Like this, can access a plurality of detection outputs that produce by a plurality of the 1st coil groups 10 in the y direction.Also have,, thereby can obtain a plurality of detection outputs because a plurality of the 2nd coil groups 30 also adopt same structure.
Each of temporarily being amplified by prime amplifier detects output, imports the central processing unit (not shown) by supple-settlement by post amplifier (not shown) separately thereafter.Supple-settlement is set suitable threshold, from surpassing the output acquisition detection signal of this threshold value, the interference that can remove noise like this after detection output that determines external interference and real inspection output.
This judgement can be judged as the detection output from external disturbance when most detection signal overall variation.Relative therewith, when specific detection signal changes, can be judged as real detection output.
Fig. 6 is the oscillogram of the detection output waveform of expression the 1st coil groups 10.In addition, though detection output is from the output voltage of coil 15 with from the output after the output voltage stack of coil 14 and coil 16, for convenience of explanation, what represent among the figure is stack output voltage before.
Output voltage like this, separately forms 3 peak values.The output voltage height that the output voltage of the coil 15 that in addition, bore is big is connected in series than coil 14 and coil 16.Thus, in the output voltage after the output voltage stack of output voltage that above-mentioned coil 14 and coil 16 are connected in series and coil 15, can be according to the detection threshold of setting, the detection sheet metal.
In addition, in the occasion that the external interference noise is arranged, because the magnetic flux speed by hollow bulb 2 is faster than the speed of conveying belt, so the cycle that is configured in the waveform of the coil 14 of its both sides and coil 15 shortens.Therefore, in the occasion that the external interference noise is arranged, the output voltage step-down after output voltage that coil 14 and coil 16 are connected in series and the stack of the output voltage of coil 15 is lower than detection threshold.
Relative therewith, in checked property, sneak into the occasion of foreign matter, proportional with the speed of conveying belt, three signals outputs respectively successively, the stack output of the output voltage of three coils does not reduce, still more than detection threshold.Therefore can prevent because the maloperation that external interference causes.In addition, the waveform of the detection of the 2nd coil groups 30 output is identical with the detection output waveform of the 1st coil groups 10.
Adopt this probe needle device 100, because the 1st coil groups 10 and the 2nd coil groups 30 are clamped hollow bulb 2 face-offs, and, the core configuration separately of face-off is become concentric shape, feasible magnetic flux by the 1st coil groups 10 and the 2nd coil groups 30 is rectilinear form, so, the detection sensitivity of D.C. magnetic field generating unit 20 sides is identical with the detection sensitivity of the 1st coil groups 10 sides, thereby have uniform detectability, can prevent because detection sensitivity is produced difference in the location of hollow bulb short transverse z sheet metal.
Since clamp the 1st coil groups 10 and the 2nd coil groups 30 and with D.C. magnetic field generating unit 20 opposite sides, disposed the 2nd D.C. magnetic field generating unit 40, the 2nd D.C. magnetic field generating unit 40 produces the identical static magnetic field of static magnetic field direction with the 2nd D.C. magnetic field generating unit 20 of passing through the 1st coil groups 10, so, the leakage of magnetic flux obviously reduces, magnetic flux by the 1st coil groups 10 and the 2nd coil groups 30 increases, and has further improved detection sensitivity.
And, the 1st coil groups 10 and the 2nd coil groups 30, because each coil is arranged on the y direction vertical with the checked property moving direction with decided interval, on the y direction vertical, clamp hollow bulb 2 configurations with the checked property moving direction, so, with the perpendicular direction y of checked property moving direction on the magnetic flux of hollow bulb 2 inside become evenly, thereby can prevent to detect error.
The 1st coil groups 10 and the 2nd coil groups 30, because the outmost surface of face-off is all in the same plane mutually, so increased by the 1st coil groups 10 or the 2nd coil groups 30 magnetic flux, promptly improved magnetic density by the 1st coil groups 10 or the 2nd coil groups 30, so, can tackle the situation that sheet metal passes through on the plane away from coil groups 10,30.
In addition, the 1st coil groups 10 and the 2nd D.C. magnetic field generating unit 40 and the 2nd coil groups 30 and the 1st D.C. magnetic field generating unit 20, owing to be configured to take in support A and B in original probe needle device, so also can utilize original probe needle device, coil groups, D.C. magnetic field generating unit are set selectively, have advantages such as the maintenance of being easy to, renewal.
And, in the occasion that specific detection output changes, from which coil groups send, thereby can determine the position of the sheet metal of hollow bulb inside owing to can determine to detect output.
In addition, in the above-described embodiments,,, be not limited thereto though set contact D.C. magnetic field generating unit 40 or 20 for as each coil 14,15,16 or 34,35,36 of the inscape of the 1st coil groups 10 or the 2nd coil groups 30.
For example, also can set for and make D.C. magnetic field generating unit 40 or 20 shorter on moving direction x, only make the coil 15 or the 30 contact D.C. magnetic field generating units 40 or 20 of central authorities.In addition, D.C. magnetic field generating unit 40 or 20 can not adopt integrally formed permanent magnet, also can use the combination of small-sized permanent magnet.
Below, with reference to Fig. 7～11 another embodiment is described.The probe needle device 200 of the 2nd embodiment is equipped with coil groups 210, D.C. magnetic field generating unit the 240, the 2nd coil groups 230 and the 2nd D.C. magnetic field generating unit 240.In addition, for giving and identical reference marks with the corresponding part of Fig. 1.
Fig. 7 is the synoptic diagram of the coil configuration of being seen probe needle device 200 from the top.As shown in Figure 7, probe needle device 200 is with respect to checked property moving direction x, tilted configuration coil groups 210 and D.C. magnetic field generating unit 240 between the magnetic flux and checked property moving direction x of D.C. magnetic field generating unit 240, make detection signal become big by setting " angle ".
Fig. 8 is the coil configuration synoptic diagram of the inspection portion inside of probe needle device 200.On support A, as shown in Figure 8, portion is provided with D.C. magnetic field generating unit 240 within it, makes hollow bulb one side of coil groups 210 contact D.C. magnetic field generating units 240.
On support B, be provided with D.C. magnetic field generating unit 220 in inside, make hollow bulb one side of coil groups 230 contact D.C. magnetic field generating units 220.Coil groups 210,230 adopts clamps hollow bulb 2 balanced configurations.
D.C. magnetic field generating unit 220 is combined by the permanent magnet 221,222 with the small-sized same specification of coil 234,235 each self-corresponding monomer.Permanent magnet 221 is corresponding to greatest extent coil 234 on size and dimension.Equally, permanent magnet 222 corresponding to greatest extent coil 235 on size and dimension.
D.C. magnetic field generating unit 240, constitute by permanent magnet 241,242 with permanent magnet 221,222 identical shaped, identical sizes, monomer, its end face is also in the same plane, and the requirement consistent with the static magnetic field direction of D.C. magnetic field generating unit 220 according to the static magnetic field of its generation is configured in D.C. magnetic field generating unit 240 on the support A.Same with D.C. magnetic field generating unit 220, permanent magnet 241 and 242 is corresponding to greatest extent coil 214,215 on size and dimension.
Fig. 9 (a) is the D.C. magnetic field generating unit 240 of support A of expression probe needle device 200 and the configuration vertical view of coil groups 210.Fig. 9 (b) is the D.C. magnetic field generating unit 230 of support B of probe needle device 200 and the configuration vertical view of coil groups 220.
Here, the combination of the combination of coil case 230 and D.C. magnetic field generating unit 220 and coil case 230 and D.C. magnetic field generating unit 240, the direction that all relatively moves X tilted configuration, so as on the moving direction X of checked property, to have decide " angle ".
Shown in Fig. 9 (a), D.C. magnetic field generating unit 240 has institute's fixed gap on checked property moving direction x, and tilted configuration permanent magnet 241,242.Coil 214,215 is same vergence direction also with each permanent magnet 241,242 on checked property moving direction x.Coil 214,215 is clamped hollow bulb 2 and is concentric shape configuration with coil 234,242.
D.C. magnetic field generating unit 240, it is configured in the permanent magnet 241,242 on the x direction, with the perpendicular y direction of checked property moving direction on arrange according to institute's fixed gap each other.Institute's fixed gap of y direction is littler than institute's fixed gap of the permanent magnet 241,242 of x direction.Also be provided with coil 214,215 on the permanent magnet 241,242.
Shown in Fig. 9 (b), D.C. magnetic field generating unit 220, there is institute's fixed gap mutually in its each permanent magnet 221,222 on the moving direction x of checked property, and tilted configuration.This vergence direction, the direction of the D.C. magnetic field generating unit 240 that disposes with clipping hollow bulb is identical.Coil 234,235 also with each permanent magnet 221,222 with, on the moving direction x of checked property, have s institute fixed gap, and a tilted configuration.
In addition, D.C. magnetic field generating unit 220, by with the perpendicular y direction of checked property moving direction on each other according to institute's fixed gap alignment arrangements on the x direction permanent magnet 221,222 and constitute.On the permanent magnet of arranging 221,222, also disposed coil 234,235.In addition, no matter the configuration of permanent magnet 221,222 and coil 234,235 still is the y direction in the x direction, all is configured to the coil 214,215 corresponding with coil 234,235 and is concentric shape.
As mentioned above, adopt probe needle device 200, owing to possess the coil groups 210 that is configured in the inspection portion 1, clamp hollow bulb 2 and be configured in and the D.C. magnetic field generating unit 220 of coil groups 210 opposite sides and the coil groups 230 that is configured in this D.C. magnetic field generating unit 220, so, on the position of hollow bulb 2, exist under the situation of sheet metal away from coil groups 210, the flux of interlinkage number improves, and detectability also improves, and can keep whole homogeneity.
Owing to can increase when sheet metal exists in hollow bulb 2 and the variation of magnetic flux when not existing,, thereby can improve the detection sensitivity of foreign matter because of the detection voltage (response voltage) of sheet metal becomes greatly.As a result, become big with the difference of external interference noise, raising relatively noiseproof feature.
For this point, describe in detail with reference to Figure 10.When Figure 10 expression travelling belt 50 passes through below hollow bulb 2, being used to carry out the detection experimental result relatively of iron ball on the position of probe needle device 200 and as shown in figure 13 original device z direction in hollow bulb, is the curve map of both detection sensitivities of expression.
The x axle of curve map shown in Figure 10 is represented the height that passes through apart from the belt surface of travelling belt 50.Initial point represents that sheet metal passes through the situation near the transmission zone face of support B, and x axle right-hand member represents that sheet metal passes through near the situation of support A.Y axle in the curve map is represented the size of relevant detection voltage.
Figure 10 is to use the demonstration example of iron ball.Actual inspection object (foreign matter) is that sewing waits the pin that fractures.By the magnetic field that permanent magnet produces,, give birth to the difference of flux of interlinkage because of the attitude product of broken needle when mobile according to its shape generation linear to a certain degree.
Such as, flux of interlinkage maximum when the attitude when broken needle moves remains on the z direction, its attitude on the x direction time flux of interlinkage bigger, its posture flux of interlinkage when the y direction is just minimum.Because this diversity ratio is bigger, so be used for showing the performance of iron ball.
According to Figure 10, the sheet metal of Φ 1.0 by be in hollow bulb away from the support B of the position of support A near the time, when promptly this sheet metal passes through the top of travelling belt, for detecting the reaction of voltage E0, be the reaction that detects voltage E1 during employing probe needle device 200 during corresponding to the original device of employing.
Both are compared E1＞E0, and E1/E0=9～9.36.So, adopt probe needle device 200, raise at the non-detectable locational flux of interlinkage of original device away from support A, detectability improves.
In addition, near support A, the detection voltage E3 of probe needle device 200 is bigger than original Device Testing voltage E4, i.e. E3＞E4.This detects voltage E3 is and the basic identical or slightly bigger value of detection voltage E1 of close support B that maximal value is E
MaxIn other words, the detection voltage max E of probe needle device 200
Max=E3 is than the maximal value E of original device
Max=E4 is much bigger.
Equally, for minimum value, the minimum value E of the detection voltage of probe needle device 200
Min(not shown) is also than the minimum value E of original Device Testing voltage
Min=E0 is much bigger.
Therefore, Zheng Ti detectability is improved.Can increase when sheet metal exists in the hollow bulb 2 and the magnetic flux change when not existing.Because can increase the variation of magnetic flux, so improved the sensitivity that detects.
This result has improved the difference with the external interference noise, has relatively improved noiseproof feature.Thereby probe needle device 200 can easily and carry out the detection of sheet metal reliably.
Here, definition transmits the maximal value E of the detection voltage that passes through short transverse z on the zone face
MaxWith minimum value E
MinDifference Δ E represent to detect multiplying power, E is more little for this difference DELTA, the detection of sheet metal is easy more.
The Δ E of probe needle device 200 and original device is compared, and original Device Testing multiplying power is Δ E0=E4/E0=6.00, and the detection multiplying power of probe needle device 200 is Δ E1=E3/E
Min=1.95～2.25.Because Δ E1＜Δ E0, this detection multiplier value Δ E1 that shows probe needle device 200 is littler than the value of original Device Testing multiplying power Δ E1.
Therefore, adopt probe needle device 200, the detection of sheet metal is carried out easily and reliably.
Below further to for the sheet metal of the Φ 0.8 of small size iron ball on transmitting zone face by the time describe.The detection voltage E2 of probe needle device 200 in the case is lower than the value of E1, than the value height of the detection voltage E0 during Φ 1.0 in original device.E2/E0=5.16～5.4 of representing this ratio.
The E of this situation
MinMinimum value E0 than original device is still big a lot, and detecting multiplying power Δ E2 is 2.11～2.21.Δ E2＜Δ E0 is for the detection of the sheet metal of Φ 0.8, more outstanding than original device.
So, adopting probe needle device 200, the higher detection voltage E2 of detection voltage E0 in the time of still obtaining sheet metal than the Φ 1.0 of original device and pass through for little sheet metal to Φ 0.8 can detect the sheet metal of Φ 0.8 reliably.Adopt probe needle device 200, the same with the sheet metal situation of Φ 1.0, can easily and carry out the detection of the sheet metal of Φ 0.8 reliably.
In addition, adopt probe needle device 200, be equipped with two coils 214,215 and 234,235 because the moving direction x of coil groups 210 and coil groups 230 each comfortable checked property goes up, thereby can offset the variation of the magnetic flux that the noise of external disturbance causes, further improve noiseproof feature.Be elaborated at this point.
The coil groups 10,30 of the probe needle device 100 of general introduction among the embodiment 1, three coils on moving direction x, have been equipped with, coil by both sides is gapped and suitably separate with central coil respectively, thereby offset by speed in the hollow bulb external interference noise when fast, can detect the normal detection signal of this speed when slow, prevent the error-detecting that causes because of the external interference noise.
But, from the time, the noise that can offset external interference of the short device of distance between the coil that disposes on the moving direction x as can be known.And spacing between this coil is short, because the intrusion angle diminishes when invading from the external interference noise source outside the hollow bulb, the scope that can offset the external interference noise broadens.
On the other hand, the detection sensitivity of coil groups has such tendency: the long more detection sensitivity of distance that constitutes between the coil of coil groups 10,30 improves, and coil-span is from short more detection sensitivity variation, promptly opposite with the characteristic of noise immunity result.
And detection sensitivity and coil bore are proportional, and the coil bore is big more, and the intensity of detection reaction is also just big more.But if the change that the coil bore increases, existence can not be accommodated into the physical property restriction in the support.
Take all factors into consideration these factors, for probe needle device 200, for spread loop bore not and obtain the mutual coordination of noiseproof feature and detection sensitivity, taked to make coil groups 210 with 230 on moving direction x separately overall distance between two coils, exist institute to decide the configuration mode at interval with in embodiment 1 compares shorter scope.
Therefore, adopt probe needle device 200, can not reduce detectability, offset flux change, and have excellent noiseproof feature because of external interference.
In addition, probe needle device 200 is one-piece type probe needle devices of inspection syringe needle that one has disposed test section 1 on moving direction x, it is characterized in that, be not make this inspection syringe needle integral body with respect to the moving direction x of the checked property configuration of tilting with reporting to the leadship after accomplishing a task, but make coil groups 210,230 (disposing two coils on the x direction) with respect to the oblique configuration of moving direction x of checked property in inspection portion 1 internal configurations.
About this point, be elaborated with reference to Figure 11.Among Figure 11, the coil 214,215 of Figure 11 (a) expression and checked property moving direction x configured in parallel, the coil 214,215 of Figure 11 (b) expression and the oblique configuration of checked property moving direction x.
Adopt probe needle device 200, shown in Figure 11 (b), because coil 214,215 is configured to respect to moving direction x predetermined angular θ is arranged, because of this angle θ,, also have the so big inclination of angle θ even for example the attitude of broken needle when mobile is parallel with x direction or y direction, thereby flux of interlinkage has the trend of increase, like this, owing to detection reaction also increases, so detection sensitivity rises.
In addition, adopt probe needle device 200, coil groups 210,230 is because the small coil of combining and configuring is in the also plural number configuration of y direction of principal axis on inspection portion 1 inner x direction, although be subjected to the restriction of detection bandwidth degree, still may increase with moving direction x angulation θ (with reference to figure 7,9).
That is to say, for original probe needle device 900 shown in Figure 12, the coil 910 of detection head inside is long ellipse, even according in the dotted line tilted configuration shown in Figure 12, this angle of inclination can be subjected to the width limitations of detection head 901, and does not just have such problem for probe needle device 200.
In addition, adopt probe needle device 200, because D.C. magnetic field generating unit 220 and 240 is made of the monomer permanent magnet corresponding to each coil 234,235 and 214,215, installed especially corresponding to the coil 234,235 of permanent magnet 221,222 or 241,242 or 214,215 coil, can prevent fractureing and damaging of D.C. magnetic field generating unit 220 and 240.
In addition, D.C. magnetic field generating unit 220,240 owing to make the permanent magnet 221,222 or 241,242 of corresponding each coil, all is spaced according to mutual institute surely in x direction and y direction, so, be not vulnerable to the influence of the variation of adjacent magnetic flux.
Each coil is not vulnerable to the influence of adjacent magnetic flux change according to being spaced of setting on the y direction, can determine to sneak on the y direction place of foreign matter.
Because the gap of setting on than y direction in the gap of the setting of x axle is big, the checked property of sneaking into foreign matter is when the x direction moves, the translational speed of driving-belt and external interference noise are poor by speed, the stagger time output of the detection voltage of positive and negative 2 ripples, the 2nd ripple that central processing unit will the be born processing of reversing, thereby can detect foreign matter.In addition, owing to make minitype permanent-magnet,, thereby cost can be suppressed very low so the manufacturing of D.C. magnetic field generating unit 220,240 is easy to according to deciding arranged spaced.
Also have, in the above-described embodiment, make coil groups clamp hollow bulb and configuration up and down, but also can clamp hollow bulb and about configuration.In addition, in an embodiment, make coil groups and D.C. magnetic field generating unit clamp hollow bulb and be provided with on both sides, on one side but also can be coil groups and direct current generating unit, another side has only coil groups.
In addition, the N utmost point of two D.C. magnetic field generating units and the S utmost point, the words that the polarity that clips hollow bulb is unified into same polarity get final product, and not merely are defined in D.C. magnetic field generating unit 20,40 shown in Fig. 2,8 or 220,240 polarity.With Fig. 2,8 opposite the z direction following for the N utmost point, top be that the arrangement of the S utmost point is also passable.
In addition, in the above-described embodiments, there is institute's fixed gap and disposes in the x direction as two coils of coil groups inscape, but be not limited thereto, also can make the continuous configuration that is in contact with one another.At this moment, the effect that abates the noise is bigger.
Equally, in embodiment 2, the permanent magnet that the D.C. magnetic field generating unit is configured to monomer has institute's fixed gap in the x direction, but is not limited thereto, and for example, the permanent magnet that also can make monomer is in contact with one another and is continuous in the x direction.
In addition, in the above-described embodiments, concerning the configuration of z direction,, be not limited thereto though adopt substantial middle to be laterally zygomorphic configuration with respect to hollow bulb.Such as, also can be that the position of support remains unchanged, be configured on the support as having worn " geta ", so that the position of coil case that in side's support, is provided with and D.C. magnetic field generating unit, than more close hollow bulb one side in the position in the opposing party's support.
The present invention will detect the article of whether having sneaked into metal and moves in deciding direction by making, utilization is sneaked into sheet metal in these article to the interference in magnetic field, can detect the sheet metal of sneaking into, simultaneously, can be applied to not to be subjected to external interference about, all industrial fields of requiring the article beyond the metal to pass through.
Claims (4)
1. a probe needle device makes checked property constitute by the hollow bulb that is positioned at central authorities of inspection portion, it is characterized in that possessing:
Two D.C. magnetic field generating units, two sides were to clamp described hollow bulb about it was configured in described hollow bulb respectively;
The 1st coil groups, it is configured on the described D.C. magnetic field generating unit of described inspection portion of described hollow bulb top;
The 2nd coil groups, it is configured on the described D.C. magnetic field generating unit of described hollow bulb below.
2. probe needle device according to claim 1 is characterized in that: the 1st coil groups and the 2nd coil groups are equipped with 2 coils separately at least on the moving direction of checked property.
3. probe needle device according to claim 2 is characterized in that: the D.C. magnetic field generating unit is made of the permanent magnet corresponding to the monomer of each coil.
4. according to any one described probe needle device of claim 1～3, it is characterized in that: the D.C. magnetic field generating unit is made of the permanent magnet that has institute's fixed gap mutually, arrange on the direction vertical with the checked property moving direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004266780 | 2004-09-14 | ||
| JP2004266780 | 2004-09-14 | ||
| JP2005075055 | 2005-03-16 |
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| CN1749779A CN1749779A (en) | 2006-03-22 |
| CN100342247C true CN100342247C (en) | 2007-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100662544A Active CN100342247C (en) | 2004-09-14 | 2005-04-25 | Probe needle device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851932A (en) * | 2012-09-17 | 2013-01-02 | 吴江市晓昱喷气织造有限公司 | Needle detecting device for sewing |
| JP6123005B2 (en) * | 2015-10-01 | 2017-04-26 | 株式会社イシダ | Foreign matter inspection device |
| CN106226823A (en) * | 2016-08-28 | 2016-12-14 | 宁波九纵智能科技有限公司 | For detecting the needle checking machine of broken needle in workpiece |
| CN106199735A (en) * | 2016-08-28 | 2016-12-07 | 宁波九纵智能科技有限公司 | The detecting system of broken needle and method in workpiece |
| JP7137530B2 (en) * | 2019-05-31 | 2022-09-14 | 株式会社日立ビルシステム | Metal impurity inspection device |
| CN110409160B (en) * | 2019-07-11 | 2022-03-08 | 羽岛株式会社 | Sensitivity testing method of conveyor belt type needle detector and conveyor belt type needle detector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131135C1 (en) * | 1998-04-14 | 1999-05-27 | Лепинь Леонард Эдуардович | Metal detector |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131135C1 (en) * | 1998-04-14 | 1999-05-27 | Лепинь Леонард Эдуардович | Metal detector |
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| CN1749779A (en) | 2006-03-22 |
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