CN100460819C - Inductance type position transducer and band tape having same - Google Patents
Inductance type position transducer and band tape having same Download PDFInfo
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- CN100460819C CN100460819C CNB2006101323299A CN200610132329A CN100460819C CN 100460819 C CN100460819 C CN 100460819C CN B2006101323299 A CNB2006101323299 A CN B2006101323299A CN 200610132329 A CN200610132329 A CN 200610132329A CN 100460819 C CN100460819 C CN 100460819C
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Abstract
The inductance transducer comprises the reading out head, modulating wheel, drive circuit and signal treatment circuit of the outcome drive signal, features in the insulation ring of the reading out head, reading out head soft plate, modulator and its insulation ring, with the synchronous wheels allocated on the coaxial shaft from the inside to the outside in ring distribution, with gaps between the reading out soft plate and the modulator, which comprises the modulating components and modulating soft plate, equal distance between the width between the modulating components and the adjacent two modulators, the corresponding circle center angle and component distance related circle center angle on the cross section of coal center equipped components of the arc for each modulating component are equal, and it is the same with the circle center angle of the negative ring unit and of the positive ring unit. It also opens an inductance transducer location sensor reel, with the said sensor installed inside the reel through the sensor shaft.
Description
Technical field
The present invention relates to a kind of inductive position sensor, the present invention also relates to a kind of tape measure that comprises this inductive position sensor simultaneously.
Background technology
Inductive position sensor is the instrument of the measurement straight-line displacement used always of people, and the high power consumption of its precision is few and be easy to carry.But present inductive position sensor can only be used to measure straight-line displacement, the metering system that can not be used for rotary or tumbling-type, therefore present inductive position sensor mostly is linear, and the inductive position sensor of annular does not occur as yet, does not therefore also see the tape measure that comprises annular inductive position sensor.Slide calliper rule also are the survey instruments of using always simultaneously, and slide calliper rule commonly used at present are digimatic calipers, and common digimatic calipers mainly contains three classes: the position sensing slide calliper rule of capacitive position sensing slide calliper rule, electromagnetic type and the position sensing slide calliper rule of inductance type.
For capacitive position sensing slide calliper rule; its inside comprises capacitance type sensor; inside at capacitance type sensor; transmitter electrode and receiver electrode are packed in the one slide-plate; transmitter electrode connects signal generating circuit; the receiver electrode connects signal read circuit; this class capacitive position transducer is suitable for the environment of dry cleansing; if in polluting relatively, measure than serious environmental; then dust or particulate or fluid enter between the signal electrode and transmitter on the slide plate and receiver electrode of slide calliper rule easily; change signal electrode and transmitter or the interelectrode electric capacity of receiver easily and cause distorted signals, reduced the accuracy of detection of capacitance type sensor.
Electromagnetic sensor is the position measurement sensor of another type, it is insensitive for the pollution that liquid causes, but the as easy as rolling off a log particulate that is subjected to being adsorbed in the magnetization slide calliper rule of magnetic sensor itself, the particularly influence of ferromagnetic particles, therefore magnetic sensor need seal, in order to avoid influence its measuring accuracy, and the power consumption of magnetic sensor compares greatly, so slide calliper rule generally do not adopt magnetic sensor.
Inductive position sensor is the sensor of present a kind of Displacement Measurement of using always, it comprises a Magnetic Field Source with pathways of conductive material, magnetic field that this Magnetic Field Source can change or magnetic flux, in magnetic field that changes or magnetic flux scope, be provided with at least one group of magnetic field or magnetic flux modulator, spatially change magnetic field or magnetic flux near this at least one magnetic field or magnetic flux modulator, the detection conductor that in the skim zone, constitutes, and form a kind of periodic magnetic flux reception area pattern, this pattern extends along measurement axis, in magnetic field that changes or magnetic flux scope, locate, like this magnetic field of Bian Huaing an or magnetic flux passive electromotive force of generation (EMP) at least one output terminal in response to the detection conductor of this variation magnetic field or magnetic flux.
At least one magnetic field or magnetic flux modulator and the periodic patterns that detects conductor, relatively moving to each other from the primary importance to the second place.The first of periodic patterns is overlapped at least one magnetic field or magnetic flux modulator on primary importance, the second portion of periodic patterns is overlapped at least one magnetic field or magnetic flux modulator on the second place, and promptly at least one magnetic field or magnetic flux modulator change the electromotive force from the primary importance to the second place.
At least one magnetic field or magnetic flux modulator according to relatively moving continuously between the two, are detecting the periodic electromotive force of conductor output terminal generation continually varying together with the periodic patterns that detects conductor.
Detecting conductor preferably alternately is made up of a plurality of first loops and a plurality of second loop, these a plurality of loops are made with conductive material, first and second loops all are arranged in the magnetic field range of variation, each first loop response produces one and changes first component of signal in the variation magnetic field, each second loop response produces a change secondary signal component in the variation magnetic field equally.
A plurality of first and second loops relatively move with magnetic field or magnetic flux modulator group, on primary importance, one or more first loops can be near corresponding one group of magnetic field or magnetic flux modulator, thereby change first component of signal that produces by these first loops, on the second place, one or more second loops can be near corresponding one group of magnetic field or magnetic flux modulator, change the secondary signal component that second loop produces thus, first and second component of signals indicate the position of first and second loop with respect to magnetic field or magnetic flux group.
Measure but above-mentioned inductive position sensor can only be used for straight-line displacement, can not be used to rotate or the position measurement of tumbling-type, therefore be restricted in usable range.
Summary of the invention
One of purpose of the present invention provides a kind of inductive position sensor, and this sensor can be rotated the position measurement of formula or tumbling-type.
Above-mentioned purpose of the present invention realizes by following technical solution: a kind of inductive position sensor, comprise reading head, modulation wheel, the driving circuit of exportable drive signal and signal processing circuit, wherein reading head comprises the reading head soft board, described reading head soft board comprises transmitter winding, receiver winding and cable, described receiver winding is made up of positive loop of receiver winding and the negative loop of receiver winding, described positive loop is made up of some positive loop unit, described negative loop is made up of some negative loop unit, positive loop unit and negative loop unit are alternately shape and equidistantly arrange, described transmitter winding links to each other with driving circuit, described receiver winding links to each other with signal processing circuit, described modulation wheel comprises synchronizing wheel, modulator dead ring and modulator, the three is layered arrangement from outside to inside successively and constitutes an integral body, modulator comprises the modulator soft board of modulator constituent element and carrying modulator constituent element, the modulator constituent element equidistantly is arranged on the surface of modulator soft board to each other, it is characterized in that described reading head also comprises the reading head dead ring, described reading head dead ring covers on the inside surface of described reading head soft board, and both constitute an integral body, described reading head dead ring, the reading head soft board, modulator, modulator dead ring and synchronizing wheel are the stratiform annular spread from the inside to the outside successively on concentric shafts, wherein leave the gap between reading head soft board and the modulator, the width of described modulator constituent element equates with spacing between the adjacent two modulator constituent elements, on the xsect of above-mentioned concentric mounted component, the pairing central angle of radian that pairing central angle of radian that each modulator constituent element is striden and the spacing between the modulator constituent element are striden equates, and and positive loop unit and the negative loop unit pairing central angle of radian of striding also equate.
When modulation wheel rotates, modulator constituent element in the magnetic flux district can relatively move with transmitter winding and receiver winding, receiver winding output terminal just can produce the detection signal with magnetic flux change, indicates the relative position of this magnetic flux transducer and at least one magnetic flux modulator constituent element.
Described modulator constituent element is magnetic flux splitter or magnetic flux booster.
Splitter can be to utilize the soft board printing technology to form and counter sticking on the modulator dead ring with conductive material, booster can be a permeability magnetic material, the application machine processing mode carries out sticking on the dead ring successively after the single processing, modulator dead ring and reading head dead ring are made with non-conducting material and non-magnet material, avoid disturbing modulation signal and produce unnecessary eddy current in the magnetic flux district.
The outside surface intermediate radial of described synchronizing wheel has the measurement silk groove of annular, and the xsect of groove takes the shape of the letter U, and the degree of depth of described groove is between the radius of measuring silk and diameter.
Another object of the present invention provides a kind of tape measure with above-mentioned inductive position sensor.
This purpose of the present invention realizes by following technical solution: a kind of tape measure with inductive position sensor, it is characterized in that it also comprises power supply, electric substrate, be loaded in analysis circuit and driving circuit on the electric substrate, housing, measure silk, measure the wire drawing mechanism of silk, measure the thread guide mechanism of silk, be used to detect the inductive position sensor of measuring silk, tape measure mouth and draw nose, electric substrate wherein, wire drawing mechanism and thread guide mechanism are installed in the housing, described inductive position sensor is installed in the housing by sensor axis, wherein sensor axis is the modulator axle of modulator, power supply links to each other with electric substrate, the demonstration electronic circuit is installed on the electric substrate, described reading head has transmitter end and receiver end, wherein transmitter end links to each other with driving circuit, receiver end links to each other with analysis circuit, measure silk successively through wire drawing mechanism, thread guide mechanism, tape measure mouth and draw nose, and through on the synchronizing wheel measurement silk groove, modulation wheel is by the modulation wheel shaft, just sensor axis is fixed in the housing, and can positive and negatively rotate under the effect of measuring the silk traction.
Described analysis circuit also is signal processing circuit, and reading head has transmitter end and receptacle end, and wherein transmitter end links to each other with driving circuit, and receiver end links to each other with analysis circuit.
Measure silk successively through wire drawing mechanism, thread guide mechanism, tape measure mouth with draw nose, and through the measurement silk groove on the synchronizing wheel, modulation wheel can positive and negatively rotate under the effect of measuring the silk traction, when modulation wheel rotates, modulator constituent element in the magnetic flux district (being splitter or booster) can relatively move with transmitter winding and receiver winding, receiver winding output terminal just can produce the detection signal with magnetic flux change, indicates the relative position of this magnetic flux transducer and at least one magnetic flux modulator constituent element.
Described wire drawing mechanism comprises axis, axle sleeve, clockwork spring, clockwork spring dish and receives the silk dish, axis is fixedly mounted in the axle sleeve, axle sleeve is fixedly mounted in the housing, clockwork spring dish and receipts silk dish are installed in the two ends of described axis side by side, clockwork spring is installed in the clockwork spring dish, one end of clockwork spring is fixed on the housing, and the other end is fixed on the axis.
The clockwork spring dish can also can be to be fixed on the housing with the design of housing one, be split-type structural with housing, the clockwork spring dish is fixed on the axis, when axis rotates, clockwork spring can stressed thereupon and storage elasticity potential energy, discharge elastic potential energy when receiving silk, secondly the elastic potential energy of clockwork spring is greater than the elastic force potential energy of the boosting spring of tape measure mouth.
Described thread guide mechanism comprises seal wire tube, the first silk pressing wheel, modulation wheel, second silk pressing wheel and angle sheave, above-mentioned parts are fixedly mounted on respectively in the housing, and described first silk pressing is taken turns and second silk pressing wheel lays respectively at the both sides of modulation wheel and cylindrical separately is tangent with the cylindrical of modulation wheel respectively.
The wheel hub of godet wheel is higher than the wheel hub of second silk pressing wheel, measuring silk can give second silk pressing wheel power of upwards lifting when pulling out, make and measure fast more that silk draws, produce slippage between the silk groove of measurement silk and modulation wheel when thereby the tight more prevention drawing speed of the second silk pressing wheel load is too fast, cause inductive means sensing mistake, and the output error signal, each silk pressing wheel is provided with scroll wheel, the wheel framework, wheel shaft and pressure spring, wherein wheel shaft is fixedly mounted in the housing, and be serially connected with wheel framework and pressure spring, scroll wheel is positioned on the wheel framework also rotatable, wheel framework and scroll wheel are the center of circle with the wheel shaft, but the arc swing, and scroll wheel can be pressed in the groove measuring silk under the effect of pressure spring.
Described tape measure mouth is a tape measure nozzle member, described tape measure nozzle member comprises the screens pawl, cylinder body, piston, boosting spring and cylinder cap, wherein cylinder body is positioned at the tape measure mouth, cylinder body has cavity, piston is installed in the cylinder body cavity, cylinder cap with piston is encapsulated in the cavity after cylinder body is fixedlyed connected, the boosting spring is installed in the space between piston and the cylinder cap and its two ends contact with piston and cylinder cap respectively, the center of described cylinder cap and piston all has can be for measuring the concentric center pit that silk passes, also have on the cylinder body and receive the post hole, the center line of described receipts post hole and center pit coincides, described screens pawl is arranged on the outer marginal circumference place of cylinder body outer face, and perpendicular with the central axis of cylinder body.
The silk hole setting height(from bottom) of the center pit of the silk groove on the synchronizing wheel and the center pit of tape measure mouth, cylinder cap and seal wire tube at grade.
The described nose that draws is to draw the nose member, described draw the nose member to comprise to pinch draw the district, card corner post and location pawl, pinch and draw the district to be arranged on the outside surface that draws nose, the card corner post is a column type, its size and receipts post hole are suitable, the card corner post be vertically set on draw nose relative with the tape measure mouth outside surface on, and be in the relative position place with described receipts post hole, described location pawl is arranged on the end face outer marginal circumference place of drawing nose, perpendicular with the central axis of card corner post, described location pawl is corresponding with the position of screens pawl, when measuring testee, the two ends that location pawl and screens pawl block testee respectively are after the tape measure rolling, when drawing the end face of nose and tape measure mouth to contact, formation face contact between described location pawl and the screens pawl.
Draw interior wild card angle, the card corner post and pinch and draw the point of application in district to mutually combine of nose and tape measure mouth, make that measuring silk coincides with card corner post circle central axis, the end face of clamping testee is with to measure silk perpendicular.
Described tape measure also comprises gear train, described gear train comprises transmission gear, accelerating gear; rocking arm and handle; wherein transmission gear is fixedly mounted on the axis and can drives axis and rotates; accelerating gear has the accelerating gear axle; the accelerating gear axle sleeve is contained on the housing; the one end passes housing and outstanding exposing to outside the housing; accelerating gear is installed in the end that the accelerating gear axle is positioned at housing; and be meshed with described transmission gear; the end that the accelerating gear axle exposes to outside the housing links to each other with rocking arm; the other end of rocking arm links to each other with handle; the end that described handle links to each other with rocking arm has the protrusion head, and the thickness of described protrusion head is greater than the gap between rocking arm and the housing.
After the receipts silk finishes, handle is folded, the protrusion head of handle just in time pushes up on the secondary casing and produces stiction at this moment, and stiction is greater than the elastic force of the boosting spring of tape measure mouth, thereby assurance is not propelled outside the spring ejection tape measure mouth after drawing the card corner post withdrawal of nose to receive the post hole.
Described tape measure also comprises braking mechanism, described braking mechanism comprises the brake button, drive link, back-moving spring, sleeve and brake pad, sleeve is fixedly mounted in the housing, drive link is sleeved in the sleeve, and its two ends pass sleeve respectively, one end of drive link links to each other with the outstanding outer brake button of housing that exposes to, described back-moving spring ring set drive link, the two ends of back-moving spring contact with brake button and sleeve respectively, the other end of drive link links to each other with brake pad, the other end of described brake pad and the outer edge surface of described modulation wheel are in the relative position place, and the brake pad surface adjacent with modulation wheel is and the suitable arc surface of modulation wheel outer edge surface.
Press the brake button, drive link is to lower slider, drive brake pad and move down this moment, brake pad contacts with the outer edge surface of modulation wheel and engages the outer edge surface of modulation wheel, blocking the measurement silk that is positioned at the synchronizing wheel groove thus can not move, in this brake process, the stressed back compression deformation of back-moving spring, storage elasticity potential energy discharges the brake button, and this moment, back-moving spring resetted, drive link moves up under the effect of spring restoring force, the drive brake pad moves up, and the effect of braking this moment finishes, and measures silk and is returned to removable state.
Compared with prior art, the present invention not only can be used for straight-line displacement and measure, and can also be used to rotate or the position measurement of tumbling-type, expands its usable range greatly.
Description of drawings
Fig. 1 is the perspective view of inductive position sensor of the present invention;
Fig. 2 is the cut-open view of inductive position sensor of the present invention;
Fig. 3 is the structural representation of reading head among Fig. 1;
Fig. 4 is the expansion planimetric map of the reading head of inductance type transducer of the present invention;
Fig. 5 is the expansion planimetric map of the modulator of inductance type transducer of the present invention;
Fig. 6 is the open mode synoptic diagram of tape measure embodiment one of the present invention, shows the parts that are loaded on the main casing;
Fig. 7 is the open mode synoptic diagram of tape measure embodiment one of the present invention, shows the parts that are loaded on the sub-shell;
Fig. 8 is that the wild card of tape measure embodiment one of the present invention is measured state reference map;
Fig. 9 is that the interior card of tape measure embodiment one of the present invention is measured state reference map;
Figure 10 is the one-piece construction cut-open view of tape measure embodiment one of the present invention;
Figure 11 is the inner structure synoptic diagram of seal wire tube shown in Figure 6;
Figure 12 is the tape measure mouth of tape measure embodiment one of the present invention and the cut-open view that draws nose;
Figure 13 is the tape measure mouth of tape measure embodiment one of the present invention and the decomposition texture synoptic diagram that draws nose;
Figure 14 is the planimetric map of the lateral surface that draws nose of tape measure embodiment one of the present invention;
Figure 15 is the planimetric map of lateral surface of the tape measure mouth of tape measure embodiment one of the present invention;
Figure 16 is the open mode synoptic diagram of tape measure embodiment two of the present invention, shows the parts that are loaded on the main casing;
Figure 17 is the open mode synoptic diagram of tape measure embodiment two of the present invention, shows the parts that are loaded on the sub-shell;
Figure 18 is the external structure synoptic diagram of tape measure embodiment two of the present invention;
Figure 19 is the one-piece construction cut-open view of tape measure embodiment two of the present invention.
Embodiment
As Fig. 1 to a kind of inductive position sensor shown in Figure 5, comprise reading head 1, modulation wheel 2, the driving circuit of exportable drive signal and signal processing circuit, wherein reading head 1 comprises reading head dead ring 11 and reading head soft board 12, reading head dead ring 11 covers on the inside surface of reading head soft board 12, and both constitute an integral body, reading head soft board 12 comprises transmitter winding, the receiver winding transmits the cable 15 that is connected with signal, reading head soft board 12 is the angle square shape of L type, transmitter winding and receiver winding are arranged in the skim zone, cable 15 links to each other with cable splice 16, reading head dead ring 11 has a breach, the corner of reading head soft board 12 and cable 15 coupling parts is used for transferring, the position that reading head soft board 12 and reading head dead ring 11 combine forms adhesion zone 17, the receiver winding is made up of positive loop 13 of receiver winding and the negative loop 14 of receiver winding, positive loop 13 is made up of some positive loop unit 131, negative loop 14 is made up of some negative loop unit 141, positive loop unit 131 and negative loop unit 141 are alternately shape and equidistantly arrange, transmitter winding links to each other with driving circuit, the receiver winding links to each other with signal processing circuit, wherein the receiver winding comprises that again first receives the winding and the second reception winding, phase differential is 90 degree between the two, modulation wheel 2 comprises synchronizing wheel 21, modulator dead ring 22 and modulator 23, the three is layered arrangement from outside to inside successively and constitutes an integral body, the outside surface intermediate radial of synchronizing wheel 21 has the measurement silk groove 211 of annular, the xsect of groove 211 takes the shape of the letter U, the degree of depth of groove 211 is between the radius of measuring silk and diameter, modulator 23 comprises the modulator soft board 232 of modulator constituent element 231 and carrying modulator constituent element 231, modulator constituent element 231 equidistant to each other 233 is arranged on the surface of modulator soft board 232, the width of modulator constituent element 231 equates with spacing 233 between the adjacent two modulator constituent elements 231, reading head dead ring 11, reading head soft board 12, modulator 23, modulator dead ring 22 and synchronizing wheel 21 are the stratiform annular spread from the inside to the outside successively on concentric shafts, wherein leave gap 24 between reading head soft board 12 and the modulator 23, on the xsect of above-mentioned concentric mounted component, the pairing central angle of radian that pairing central angle of radian that each modulator constituent element 231 is striden and the spacing 233 between the modulator constituent element 231 are striden equates, and and positive loop unit 131 and the negative loop unit 141 pairing central angle of radian of being striden also equate.
When modulation wheel 2 rotations, modulator constituent element 231 in the magnetic flux district can relatively move with transmitter winding and receiver winding, receiver winding output terminal just can produce the detection signal with magnetic flux change, indicate the relative position of this magnetic flux transducer and at least one magnetic flux modulator constituent element, when the pairing positive loop unit of modulator constituent element is carried out the relative variation of position with negative loop unit, positive and negative loop unit with selected spatial frequency according to varies with sinusoidal function.
That Fig. 6 is extremely shown in Figure 15 is a kind of first embodiment with tape measure of inductive position sensor, it comprises power supply 63, electric substrate 61, be loaded on the electric substrate 61 analysis circuit and driving circuit, housing, measure silk 3, measure the wire drawing mechanism of silk 3, measure the thread guide mechanism of silk 3, braking mechanism, be used to detect the inductive position sensor of measuring silk 3, tape measure mouth 300 and draw nose 400, housing comprises main casing 71 and sub-shell 72, fixedly connected between the two, and formation has the housing of cavity, wherein electric substrate 61, sensor, wire drawing mechanism and thread guide mechanism are installed in the cavity of housing, sensor comprises reading head 1, modulation wheel 2, parts such as the driving circuit of exportable drive signal and signal processing circuit, sensor is installed in the housing by sensor axis 25, wherein sensor axis 25 is the modulator axle 25 of modulator 2, power supply 63 links to each other with electric substrate 61, be equipped with on the electric substrate 61 and show electronic circuit 62, reading head 1 has transmitter end and receptacle end, wherein transmitter end links to each other with driving circuit, receiver end links to each other with analysis circuit, and this analysis circuit also is signal processing circuit.
Measure silk 3 successively through wire drawing mechanism, thread guide mechanism, tape measure mouth 300 and draw nose 400, and through on the synchronizing wheel 21 measurement silk groove 211, modulation wheel 2 is by modulation wheel shaft 25, just sensor axis 25 is fixed in the housing, and under the effect of measuring silk 3 tractions, can positive and negatively rotate, when modulation wheel 2 rotations, modulator constituent element 231 in the magnetic flux district (being one of splitter or booster) can relatively move with transmitter winding and receiver winding, receiver winding output terminal just can produce the detection signal with magnetic flux change, indicates the relative position of this magnetic flux transducer and at least one magnetic flux modulator constituent element.
As Fig. 6, Fig. 7, shown in Figure 10, wire drawing mechanism of the present invention comprises axis 101, axle sleeve 102, clockwork spring 104, clockwork spring dish 105 and receipts silk dish 106, axis 101 is fixedly mounted in the axle sleeve 102, axle sleeve 102 is fixedly mounted in the housing by axle sleeve shell 103, clockwork spring dish 105 and receipts silk dish 106 are installed in the two ends of axis 101 side by side, clockwork spring 104 is installed in the clockwork spring dish 105, one end of clockwork spring 104 is fixed on the housing, the other end is fixed on the axis 101 by clockwork spring gib screw 107, wherein receive silk dish 106 and also be fixed on the axis 101 by receiving a silk dish gib screw 108, axis 101 can be with clockwork spring dish 105 or is manually received the mutual transmission of silk parts.
As Fig. 6, Figure 10 and shown in Figure 11, thread guide mechanism of the present invention comprises seal wire tube 201, first silk pressing wheel 202, modulation wheel 2, second silk pressing wheel 203 and angle sheave 204, above-mentioned parts are fixedly mounted in the housing respectively, first silk pressing wheel, 202 and second silk pressing wheel 203 lays respectively at the both sides of modulation wheel 2 and cylindrical separately is tangent with the cylindrical of modulation wheel 2 respectively, seal wire tube 201 is fixed on the casing, 201 internal structures of seal wire tube are Y type funnel-form, the one end is that mouth is drawn in rectangular expansion, the other end is the wire vent hole, the wire vent hole is columniform aperture, the aperture of aperture is a bit larger tham the diameter of measuring silk 3, angle sheave 204 is fixed near the cylinder cap of tape measure mouth 300, provides a correct orbit for measuring silk 3.
The wheel hub of angle sheave 204 is higher than the wheel hub of second silk pressing wheel 203, measuring silk 3 takes turns 203 1 power of upwards lifting can for when pulling out second silk pressing, make and measure fast more that silk 3 draws, it is tight more that second silk pressing wheel 203 is pressed, thereby produce slippage between the silk groove 211 of measurement silk 3 and modulation wheel when stoping drawing speed too fast, cause inductive means sensing mistake output error signal, each silk pressing wheel is equipped with scroll wheel, the wheel framework, wheel shaft and pressure spring, wherein wheel shaft is fixedly mounted in the housing, and be serially connected with wheel framework and pressure spring, scroll wheel is positioned on the wheel framework also rotatable, wheel framework and scroll wheel are the center of circle with the wheel shaft, but the arc swing, and scroll wheel can be pressed in the groove 211 measuring silk 3 under the effect of pressure spring.
As Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 12, Figure 13, shown in Figure 15, tape measure mouth 300 of the present invention is a tape measure nozzle member, the tape measure nozzle member comprises screens pawl 301, cylinder body 302, piston 303, boosting spring 304 and cylinder cap 305, wherein cylinder body 302 is positioned at tape measure mouth 300, cylinder body 302 has cavity 306, piston 303 is installed in the cylinder body cavity 306, connect by screw retention between cylinder cap 305 and the cylinder body 302, and piston 303 is encapsulated in the cavity 306, boosting spring 303 is installed in the space between piston 303 and the cylinder cap 305, and its two ends contact with piston 303 and cylinder cap 305 respectively, the center of cylinder cap 305 and piston 303 all has can be for measuring the silk 3 concentric center pits that pass, also have on the cylinder body 302 and receive post hole 307, receipts post hole 307 and cylinder cap are that the center line of the center pit of piston coincides, screens pawl 301 is arranged on the outer marginal circumference place of cylinder body outer face, and perpendicular with the central axis of cylinder body 302, the right angle that forms between screens pawl 301 and the cylinder body 302 is interior card angle 308.
The center pit of the silk groove 211 on the synchronizing wheel 21 and the center pit of tape measure mouth 300, cylinder cap 305 and the silk hole setting height(from bottom) of seal wire tube 201 are at grade, be convenient to like this measure silk 3 only is subjected to pulling force in measuring process effect, can be subjected to the influence of other power.
As Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 12, Figure 13, shown in Figure 14, the nose 400 that draws of the present invention is to draw the nose member, draw the nose member to comprise to pinch and draw district 401, card corner post 402 and location pawl 403, pinch and draw district 401 to be arranged on the outside surface that draws nose 400, card corner post 402 is a column type, its size and receipts post hole 307 are suitable, card corner post 402 be vertically set on draw nose 400 and tape measure mouth 300 relative outside surface on, and be in the relative position place with receipts post hole 307, location pawl 403 is arranged on the end face outer marginal circumference place of drawing nose 400, perpendicular with the central axis of card corner post 402, location pawl 403 and to draw between the nose 400 right angle that forms be interior card angle 404, location pawl 403 is corresponding with the position of screens pawl 301, when measuring testee, location pawl 403 and screens pawl 301 block two outer faces of testee respectively, after the tape measure rolling, when drawing the end face of nose 400 and tape measure mouth 300 to contact, formation face contact between location pawl 403 and the screens pawl 301.
As shown in Figure 8, draw nose 400 and tape measure mouth 300 corresponding end faces two outer end faces of surveying for this tape measure, testee is clamped in these two outer surveys between the end face, as shown in Figure 9, end face is surveyed in two of this tape measure in the outer face of screens pawl 301 and location pawl 403, these two outer faces are smooth plane also, and during measurement, these two outer faces contact with the inner face of testee respectively.
Draw interior wild card angle, the card corner post 402 of nose 400 and tape measure mouth 300 and pinch and draw the point of application in district 401 to mutually combine, make the circle central axis of measuring silk 3 and card corner post 402 coincide, the end face of clamping testee is with to measure silk perpendicular.
As shown in Figure 6, tape measure of the present invention also comprises braking mechanism, braking mechanism comprises brake button 501, drive link 502, back-moving spring 503, sleeve 504 and brake pad 505, sleeve 504 is fixedly mounted in the main casing 71 by locating button 506, drive link 502 is sleeved in the sleeve 504, and its two ends pass sleeve 504 respectively, one end of drive link 502 links to each other with the outstanding outer brake button 501 of housing that exposes to, back-moving spring 503 ring set drive links 502, the two ends of back-moving spring 503 contact with brake button 501 and sleeve 504 respectively, the other end of drive link 502 links to each other with brake pad 505, the outer edge surface of the other end of brake pad 505 and modulation wheel 2 is in the relative position place, and brake pad 505 and modulation wheel 2 adjacent surfaces be and the suitable arc surface of modulation wheel outer edge surface, can push after brake pad 505 moves down to be installed in and measure the interior measurement silk 3 of silk groove 211.
In the present embodiment, an end of measuring silk 3 is fixed on to be received in silk dish 106 inner rings, and be wound on and receive silk dish 106 and draw seal wire tube 201 after a few, send into tape measure mouth 300 again after second silk pressing wheel 203 is guided to angle sheave 204 in first silk pressing wheel 202 imports the silk groove 211 of modulation wheels, the terminal filament head after drawing in the receipts post hole 307 of tape measure mouth 300 is fixed on card corner post 402 centers of circle of drawing nose 400.
When measuring silk 3 and pull out tape measure mouth 300, drive modulation wheel 2 rotations by the traction of measuring silk 3, distance between the lateral surface that draws nose 400 this moment and the lateral surface of tape measure mouth 300 equates that with the arc length that root edge rotated of modulation wheel groove 211 promptly measurement 3 line length of pulling out from tape measure mouth 300 equate with the arc length that modulation wheel groove 211 is rotated.
Above-mentioned is first preferred embodiment of tape measure, and present embodiment also can be made following change, does not comprise braking mechanism, and all the other structures are all identical with embodiment one, so still can satisfy the measurement requirement of tape measure.
That Figure 16 is extremely shown in Figure 19 is a kind of second embodiment with tape measure of inductive position sensor; This embodiment adopts manual receipts silk mode; Different with embodiment one is; Present embodiment does not comprise the braking mechanism among the embodiment one; Remaining part is identical with embodiment one; The tape measure of present embodiment also comprises transmission mechanism in addition; Transmission mechanism comprises travelling gear 601; Accelerating gear 602; Rocking arm 603 and handle 604; Wherein travelling gear 601 is fixedly mounted on the axis 101 and can drives axis 101 and rotates; Accelerating gear 602 has accelerating gear axle 605; Accelerating gear axle 605 is sleeved on the sub-shell 72 of housing; The one end passes sub-shell 72 and outstanding exposing to outside the sub-shell 72; Accelerating gear 602 is installed in the end that accelerating gear axle 605 is positioned at housing; And be meshed with travelling gear 601; Accelerating gear axle 605 exposes to the outer end of housing and links to each other with rocking arm 603; The other end of rocking arm 603 links to each other with handle 604; Handle 604 can drive rocking arm 603 and circumferentially rotate; And then drive accelerating gear axle 605 circumferentially rotates; Leave gap 606 between the outer surface of rocking arm 603 and sub-shell 72; The end that handle 604 links to each other with rocking arm 603 has and protrudes 607, protrudes 607 thickness greater than the gap 606 between rocking arm 603 and the housing. After the receipts silk finishes, handle 604 is folding, the protrusion 607 of handle 604 just in time pushed up on the outside surface of secondary casing 72 and produced stiction this moment, stiction is greater than the elastic force of the boosting spring 304 of tape measure mouth 300, thereby assurance is not propelled outside the spring 304 ejection tape measure mouths 300 after drawing the card corner post 402 of nose 400 to regain post holes 307.
Claims (9)
1. tape measure, it has inductive position sensor, described inductive position sensor comprises reading head, modulation wheel, the driving circuit of exportable drive signal and signal processing circuit, wherein reading head comprises the reading head soft board, described reading head soft board comprises transmitter winding, receiver winding and cable, described receiver winding is made up of positive loop of receiver winding and the negative loop of receiver winding, described positive loop is made up of some positive loop unit, described negative loop is made up of some negative loop unit, positive loop unit and negative loop unit are alternately shape and equidistantly arrange, described transmitter winding links to each other with driving circuit, described receiver winding links to each other with signal processing circuit, described modulation wheel comprises synchronizing wheel, modulator dead ring and modulator, the three is layered arrangement from outside to inside successively and constitutes an integral body, modulator comprises the modulator soft board of modulator constituent element and carrying modulator constituent element, the modulator constituent element equidistantly is arranged on the surface of modulator soft board to each other, described reading head also comprises the reading head dead ring, described reading head dead ring covers on the inside surface of described reading head soft board, and both constitute an integral body, described reading head dead ring, the reading head soft board, modulator, modulator dead ring and synchronizing wheel are the stratiform annular spread from the inside to the outside successively on concentric shafts, wherein leave the gap between reading head soft board and the modulator, the width of described modulator constituent element equates with spacing between the adjacent two modulator constituent elements, on the xsect of above-mentioned concentric mounted component, the pairing central angle of radian that pairing central angle of radian that each modulator constituent element is striden and the spacing between the modulator constituent element are striden equates, and equal the pairing central angle of radian that positive loop monocycle is striden, also equal the pairing central angle of radian that negative loop unit is striden, it is characterized in that: this tape measure also comprises power supply, electric substrate, be loaded in analysis circuit and driving circuit on the electric substrate, housing, measure silk, measure the wire drawing mechanism of silk, measure the thread guide mechanism of silk, be used to detect the inductive position sensor of measuring silk, tape measure mouth and draw nose, electric substrate wherein, wire drawing mechanism and thread guide mechanism are installed in the housing, described inductive position sensor is installed in the housing by sensor axis, wherein sensor axis is the modulator axle of modulator, power supply links to each other with electric substrate, the demonstration electronic circuit is installed on the electric substrate, described reading head has transmitter end and receiver end, wherein transmitter end links to each other with driving circuit, receiver end links to each other with analysis circuit, measure silk successively through wire drawing mechanism, thread guide mechanism, tape measure mouth and draw nose, and through the measurement silk groove on the synchronizing wheel, modulation wheel is by the modulation wheel shaft, just sensor axis is fixed in the housing, and can positive and negatively rotate under the effect of measuring the silk traction.
2. a kind of tape measure according to claim 1 is characterized in that: described modulator constituent element is magnetic flux splitter or magnetic flux booster.
3. a kind of tape measure according to claim 1 and 2 is characterized in that: the outside surface intermediate radial of described synchronizing wheel has the measurement silk groove of annular, and the xsect of groove takes the shape of the letter U, and the degree of depth of described groove is between the radius of measuring silk and diameter.
4. tape measure according to claim 1, it is characterized in that: described wire drawing mechanism comprises axis, axle sleeve, clockwork spring, clockwork spring dish and receives the silk dish, axis is fixedly mounted in the axle sleeve, axle sleeve is fixedly mounted in the housing, clockwork spring dish and receipts silk dish are installed in the two ends of described axis side by side, clockwork spring is installed in the clockwork spring dish, and an end of clockwork spring is fixed on the housing, and the other end is fixed on the axis.
5. tape measure according to claim 1, it is characterized in that: described thread guide mechanism comprises seal wire tube, first silk pressing wheel, described modulation wheel, second silk pressing wheel and angle sheave, above-mentioned parts are fixedly mounted on respectively in the housing, and described first silk pressing is taken turns and second silk pressing wheel lays respectively at the both sides of described modulation wheel and cylindrical separately is tangent with the cylindrical of described modulation wheel respectively.
6. tape measure according to claim 1, it is characterized in that: described tape measure mouth is a tape measure nozzle member, described tape measure nozzle member comprises the screens pawl, cylinder body, piston, boosting spring and cylinder cap, wherein cylinder body is positioned at the tape measure mouth, cylinder body has cavity, piston is installed in the cylinder body cavity, cylinder cap with piston is encapsulated in the cavity after cylinder body is fixedlyed connected, the boosting spring is installed in the space between piston and the cylinder cap and its two ends contact with piston and cylinder cap respectively, the center of described cylinder cap and piston all has can be for measuring the concentric center pit that silk passes, also have on the cylinder body and receive the post hole, the center line of described receipts post hole and center pit coincides, described screens pawl is arranged on the outer rim place of cylinder body outer face, and perpendicular with the central axis of cylinder body.
7. tape measure according to claim 6, it is characterized in that: the described nose that draws is to draw the nose member, described draw the nose member to comprise to pinch draw the district, card corner post and location pawl, pinch and draw the district to be arranged on the outside surface that draws nose, the card corner post is a column type, its size and receipts post hole are suitable, the card corner post be vertically set on draw nose relative with the tape measure mouth outside surface on, and be in the relative position place with described receipts post hole, described location pawl is arranged on the end face outer rim place of drawing nose, perpendicular with the central axis of card corner post, described location pawl is corresponding with the position of screens pawl, when measuring testee, the two ends that location pawl and screens pawl block testee respectively, after the tape measure rolling, when drawing the end face of nose and tape measure mouth to contact, formation face contact between described location pawl and the screens pawl.
8. tape measure according to claim 1, it is characterized in that: described tape measure also comprises gear train, described gear train comprises transmission gear, accelerating gear; rocking arm and handle; wherein transmission gear is fixedly mounted on the axis and can drives axis and rotates; accelerating gear has the accelerating gear axle; the accelerating gear axle sleeve is contained on the housing; the one end passes housing and outstanding exposing to outside the housing; accelerating gear is installed in the end that the accelerating gear axle is positioned at housing; and be meshed with described transmission gear; the end that the accelerating gear axle exposes to outside the housing links to each other with rocking arm; the other end of rocking arm links to each other with handle; the end that described handle links to each other with rocking arm has the protrusion head, and the thickness of described protrusion head is greater than the gap between rocking arm and the housing.
9. tape measure according to claim 1, it is characterized in that: described tape measure also comprises braking mechanism, described braking mechanism comprises the brake button, drive link, back-moving spring, sleeve and brake pad, sleeve is fixedly mounted in the housing, drive link is sleeved in the sleeve, and its two ends pass sleeve respectively, one end of drive link links to each other with the outstanding outer brake button of housing that exposes to, described back-moving spring ring set drive link, the two ends of back-moving spring contact with brake button and sleeve respectively, the other end of drive link links to each other with brake pad, the other end of described brake pad and the outer edge surface of described modulation wheel are in the relative position place, and the brake pad surface adjacent with modulation wheel is and the suitable arc surface of modulation wheel outer edge surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101323299A CN100460819C (en) | 2006-12-26 | 2006-12-26 | Inductance type position transducer and band tape having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101323299A CN100460819C (en) | 2006-12-26 | 2006-12-26 | Inductance type position transducer and band tape having same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995921A CN1995921A (en) | 2007-07-11 |
| CN100460819C true CN100460819C (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101323299A Expired - Fee Related CN100460819C (en) | 2006-12-26 | 2006-12-26 | Inductance type position transducer and band tape having same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100460819C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020252172A1 (en) * | 2019-06-14 | 2020-12-17 | Milwaukee Electric Tool Corporation | Motorized tape measure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708816A (en) * | 2019-01-08 | 2019-05-03 | 孙剑军 | Water segregator leakproof water sensor and its working method |
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| US5894678A (en) * | 1997-01-29 | 1999-04-20 | Mitutoyo Corporation | Electronic linear tape measure using a low power induced current position transducer |
| CN1470847A (en) * | 2002-07-03 | 2004-01-28 | ��˹���ڶ���ˡ���Ү | Inductive position sensor with vernier and coupling scale |
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|---|---|---|---|---|
| US4774603A (en) * | 1986-09-26 | 1988-09-27 | Hewlett-Packard Company | Integral tape path assembly including speed sensor guide subassembly with off-center sprung washer |
| US5493217A (en) * | 1993-01-22 | 1996-02-20 | Robert Bosch Gmbh | Longer-lasting inductive sensor with an electrical coil having improved load-bearing and thermal properties |
| CN1157910A (en) * | 1995-05-16 | 1997-08-27 | 三丰株式会社 | Induced current position transducer |
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| US5894678A (en) * | 1997-01-29 | 1999-04-20 | Mitutoyo Corporation | Electronic linear tape measure using a low power induced current position transducer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020252172A1 (en) * | 2019-06-14 | 2020-12-17 | Milwaukee Electric Tool Corporation | Motorized tape measure |
| US11466969B2 (en) | 2019-06-14 | 2022-10-11 | Milwaukee Electric Tool Corporation | Motorized tape measure |
| US11946736B2 (en) | 2019-06-14 | 2024-04-02 | Milwaukee Electric Tool Corporation | Motorized tape measure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1995921A (en) | 2007-07-11 |
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