CN100365390C - Counter-type lattice belt for switch type digital displacement sensor - Google Patents
Counter-type lattice belt for switch type digital displacement sensor Download PDFInfo
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- CN100365390C CN100365390C CNB2005100866077A CN200510086607A CN100365390C CN 100365390 C CN100365390 C CN 100365390C CN B2005100866077 A CNB2005100866077 A CN B2005100866077A CN 200510086607 A CN200510086607 A CN 200510086607A CN 100365390 C CN100365390 C CN 100365390C
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Abstract
The present invention relates to a counting type grid belt for a switch type digital displacement sensor, which belongs to the design technique of a sensing device for measuring displacement or strain of an object. The present invention is characterized in that grids on a grid belt R are divided into a plurality of units, each unit is provided with grids with the amount of N, and the N is greater than or equal to three; the grids of each unit are orderly numbered from the same direction according to the same order, the grids with the same number are connected with the same lead through an electric block S, and a signal processing circuit is input. In addition, because the grid belt R is divided into the N grids which are parallelly distributed, the wire connection is simple. The present invention can reduce connecting wires of the grids of the switch type digital displacement sensor, and the present invention reduces manufacturing complexity and improves the precision of manufacture and measurement.
Description
Technical field:
The counter type lattice belt that is used for switched mode digital displacement transducer belongs to the sensing device design field that measures ohject displacement or strain.
Background technology:
At present, the sensing device of existing a lot of Displacement Measurement and strain.These displacement sensing apparatus can be divided into analog and digital, mainly contain potentiometer, resistance-strain type, condenser type, inductance type, eddy current type, photo-electric and raster pattern, inductosyn formula and magnetic-grid-type etc.These sensing device technology are comparative maturity all, and under suitable working environment, its product can satisfy test request.But in many laboratories that relate to field measurement and environmental baseline complexity such as civil engineering work measured, the condition of work of displacement transducer was often relatively more abominable.The acute variation of external conditions such as temperature, humidity, pressure and electromagnetic interference (EMI) even outage etc. are had higher requirement to the job stability of displacement sensing apparatus.In many displacement measurement work of scientific research and engineering practice, also be difficult to obtain to measure the higher displacement transducer of job stability at present, even also possibly can't obtain measurement data.This mainly is because the antijamming capability of moment sensor is difficult to satisfy the requirement of these measurement environment.For example, pot, resistance-strain type etc. are responsive to temperature, humidity ratio, and the general shielding requirements of sensor of electromagnetic measurement principles such as condenser type, inductance type, magnetic-grid-type is higher, and these limitation all can reduce the reliability that displacement measures.
The applicant had once applied for patent of invention " switched mode digital displacement transducer " on June 17th, 2005, application number 200510011955.8, patent of invention " switched mode digital displacement transducer that uses displacement to amplify ", application number 200510012185.9 have been applied on July 15th, 2005.In above-mentioned two patented claims, several switched mode digital displacement transducers have been disclosed.As shown in Figure 1, plate grid B and electrode C on the non-conductive motherboard of strip, dash area is represented electric conductor, and non-shaded portion is non-conductive.Lattice belt B is fixed in company with motherboard on the object that produces relative displacement, and the width of each grid equates that spacing also equates, and raster width and spacing equivalence, C is the whole piece conductive electrode, is positioned at the side of lattice belt B, join with high level (perhaps low level), but do not contact with grid.D is the metal slide plate, and its width is the twice of B row grid, and it well contacts with the C electrode with the B grid.B row grid connects low level (perhaps high level) by lead through the necessary back of handling respectively, has constituted many loops by each grid, direct supply on conductive electrode C and the B row like this, and the gap location of each loop between grid and conductive electrode C disconnects.When the original state displacement is zero, the left side snap of slide plate D left side and first grid of the right.When detecting displacement, slide plate D moves along with moving of object, in the time of on covering some grids, the loop conducting of this grid, produce electric signal in the loop, in the loop, connect lead-out terminal G, signal is outputed in the data processing circuit handle, can learn the position of slide plate D on motherboard, the distance that slide plate D slips over is the displacement that object produces.
The width of B grid and spacing can suitably be adjusted with actual needs, guarantee preferably during adjustment that the width of each grid equates, spacing also equates, and raster width and spacing equivalence.
No matter whenever, all want can be with on the B grid contacts slide plate D.If the width of slide plate D is during less than the spacing of B grid, will occur in the interval that the D slide plate can be in the B grid and do not run into the situation of any conductive grid, at this moment just can not judge where slide plate D is in go the lattice belt B actually, thereby may cause the displacement measurement failure or error occur.So D slide plate width more preferably greater than the spacing of B grid to avoid occurring the situation that slide plate D does not bump any grid.And when D slide plate width during greater than the spacing of B grid, the situation that the D slide plate is run into two above B grids simultaneously then can appear, at this moment just can unite these two (or several) B grids and determine the position of D slide plate.But for the facility on the sensor displacement judgment processing, the twice of the contact width of D slide plate and grid being made B grid distance (the B grid is wide equidistantly) is the most convenient.Because equidistantly wait under the condition of width at the B grid, when D slide plate width equals B grid distance twice, the D slide plate is run into the probability of two grids (having represented the D slide plate to be in the position in the room between these two grids) simultaneously and probability that the D slide plate is only run into a grid (having represented the D slide plate to be in the position of this grid) equates, the scale of B grid this " rule " is linear so, uniformly, this is just very convenient.And if the width of D slide plate still is not equal to two times of its spacing greater than the B grid distance, its " scale " was just not necessarily linear when B grid this " rule " came " reading " by D so, uniformly, though methods such as employing data processing still might be discerned, but it is not too convenient, so inadvisable.
The lattice belt A of lattice belt B top is the lattice belt of another representative high range among Fig. 1.When range was big, obviously the grid quantity on the B grid also should be bigger, by the wiring of above-mentioned ultimate principle and signal Processing more complicated all, therefore proposed increase grid band A on the basis of grid band B and represent high range.As figure, on the basis of original lattice belt B, on the non-conductive motherboard of strip, increase by row's electric conductor grid A again, grid A is positioned at the opposite side of conductive electrode C, each grid also is serially connected in the loop, disconnect at a certain distance between grid, the centre distance of parting should be the even-multiple of raster width on the B grid.
The 1. lattice belt B is made up of the identical unit of several structures, provided among Fig. 1, the 2. 3. part of a unit of a unit and the, and each unit of grid B is made up of 5 grids in this example.Distance between the parting of grid A should be the width of a unit of B lattice belt.When slide plate D slides, can judge that slide plate D is positioned on which grid of this unit in each unit of B lattice belt on lattice belt B; Simultaneously, slide plate D also slides on grid A, and differentiating at this moment in the position on the grid A in conjunction with slide plate D, slide plate D is positioned on which unit of lattice belt B.Therefore, can judge that by the signal of slide plate D slide plate D is positioned on which unit and which grid on this unit of lattice belt B, thereby determine the position of slide plate D.
That is to say, the position judgment of slide plate is divided into two parts, the relatively large number (representing slide plate to be positioned at which unit) of part expression slide plate position, another part is represented the relatively small number (slide plate is positioned at which grid on the discrete cell) of slide plate position.Sensing device is judged the relatively large number and the relatively small number of slide plate position respectively, lumps together the position that just can determine slide plate.(this is actually position encoded a kind of mode, and the information of slide plate position is determined to be determined by different coded combinations) then, according to the position of slide plate, demonstrates the displacement of object with data handling system and digital instrument.
And the width of A row grid only need guarantee to equal the overall width of a unit of B row grid and gets final product.Seam in the A grid between each grid is narrow, should be less than the width of slide plate D, this is in order to guarantee that slide plate D is when slipping over two adjacent A grids, can contact these adjacent two A grids simultaneously, not drop on the situation of not running into any A grid between two adjacent A grids and slide plate D can not occur.When slide plate D contacts two adjacent A grids simultaneously, utilize single-chip microcomputer to judge according to known judgment rule this moment, slide plate D was on which piece that is in two A grids on the logical meaning of position according to the positional information on the grid B, and then can judge the position of slide plate D on the whole piece lattice belt.
Shown in Figure 2 is with the displacement transducer of generating laser as on-off element, be with the difference of Fig. 1, grid on the lattice belt B is that (resistance is very little during this photoelectric material illumination for special photoelectric material, unglazed according to the time resistance very big, so be relative conducting state during illumination, unglazed according to the time be relative state of insulation), all connect common block of conductive material C and S at the grid two ends, and be serially connected in the loop grid conduction that laser scanning is arrived, loop conducting by conducting block.Lattice belt A is the lattice belt of expression high range among Fig. 2, and its length goes up the even-multiple (equaling the width of lattice belt B unit) of raster width for lattice belt B.
Fig. 3 is the conceptual scheme of the switched mode digital displacement transducer of the employing displacement amplification in 200510012185.9 patented claims, after amplifying displacement earlier, the mode that has wherein adopted gear to amplify measures again, its lattice belt R is an annular, be distributed with the grid of photoelectric material above, R distributes around axle X, on the axle X generating laser is housed.U is the sliver that is carved with striped, when U moves, drives by the gear W in the gear amplification system, and axle V, axle X rotation makes laser T scan on lattice belt R.The signal Processing principle is consistent with the contact formula, and the distribution mode of the grid of lattice belt R is consistent with scheme in 200510011955.8 patented claims.
In the such scheme, each grid all must connect a lead, and is input to signal processing circuit such as single-chip microcomputer and handles, and can cause the shortcoming of line complexity when grid is too much, has increased the complicacy of making, and also may make the precision of measurement influenced.
Summary of the invention:
The objective of the invention is to, overcome the defective of the existing wiring complexity of above-mentioned several switched mode digital displacement transducer, arrangement mode to lattice belt designs, a kind of counter type lattice belt has been proposed, make the line of sensor reduce, manufacture craft is oversimplified, and precision is improved.
The invention is characterized in, grid division on the lattice belt R is a plurality of unit, each unit comprises N grid, N is more than or equal to 3, the grid of each unit from same direction according to same order number consecutively, the grid that all numberings are identical connects same lead by conducting block S, and the input signal treatment circuit.
It is characterized in that, also has a lattice belt P who represents high range, lattice belt P and above-mentioned lattice belt R are arranged in parallel, and the grid number on the lattice belt P equates with the unit number that lattice belt R is divided, and the width of last each grid of lattice belt P equals the width that lattice belt R goes up each unit.
Another kind of counter type digital displacement sensor is characterized in that contain N bar lattice belt, N is more than or equal to 3, and the both sides of every lattice belt connect two conductive electrodes respectively, and wherein one connects high or low level, another input signal treatment circuit; The parallel distribution of described N bar lattice belt, constitute the lattice belt group, this lattice belt group is divided into the unit of a plurality of grid distribution situation unanimities along its length, and each unit includes N grid, this N grid is distributed on the N bar lattice belt, and is equally spaced along the length direction of lattice belt group.
It is characterized in that, also has a lattice belt P who represents high range, lattice belt P and above-mentioned lattice belt group are arranged in parallel, and the grid number on the lattice belt P equates with the unit number that the lattice belt group is divided, and the width of last each grid of lattice belt P equals the width of each unit on the lattice belt group.
Also have a kind of counter type digital displacement sensor, it is characterized in that, contain N bar lattice belt, N is more than or equal to 3, and the both sides of every lattice belt connect two conductive electrodes respectively, and wherein one connects high or low level, another input signal treatment circuit; The parallel distribution of described N bar lattice belt constitutes the lattice belt group, and this lattice belt group is divided into the unit of a plurality of grid distribution situation unanimities along its length, and these grids are equally spaced along the length direction of lattice belt group; In each unit, the signal of the grid at the diverse location place of lattice belt group conduction back input signal treatment circuit is formed different codings; Also have a lattice belt P who represents high range, lattice belt P and described lattice belt group are arranged in parallel, and the grid number on the lattice belt P equates with the unit number that lattice belt is divided, and the width of last each grid of lattice belt P equals the width of each unit of lattice belt group.
Experiment showed, that the present invention can reduce the line of the grid of switched mode digital displacement transducer, reduced the complicacy of making, improved the precision of making and measuring, reached its intended purposes.
Description of drawings:
Fig. 1 is the switched mode digital displacement transducer synoptic diagram of the contact formula in the patented claim 200510011955.8;
Fig. 2 is the switched mode digital displacement transducer synoptic diagram of the laser type in the patented claim 200510011955.8;
Fig. 3 is the switched mode digital displacement transducer synoptic diagram of the displacement amplifying type in the patented claim 200510012185.9;
Fig. 4 is the grid wiring schematic diagram of counter type of the present invention;
Fig. 5 is the grid distribution schematic diagram of the counter type of layering;
Fig. 6 is the counter type grid distribution schematic diagram that has increased the high range lattice belt;
Fig. 7 is the grid distribution schematic diagram of layering and the counter type that increases the high range lattice belt;
Fig. 8 is the lattice belt synoptic diagram that adopts different coding.
Embodiment:
The present invention only improves the distribution and the mode of connection of grid, switched mode digital displacement transducer for contact formula and laser type, and the sensor that adopts the displacement amplifying type, the scheme of mentioning in the design of others and the background technology is the same, only the distribution situation of lattice belt is described in detail here.
With the laser type digital displacement sensor be example, as shown in Figure 4: R is photoelectric material grid band (wherein light dash area is a photoelectric material), wide equidistantly, width and spacing also equate, are numbered 1,2,3 three kinds; Q is the common conductive material conductive electrode Q that links to each other with R, and links to each other with high level (or low level); S is a conducting block, and all S pieces also are numbered as 1,2,3 three kinds, and corresponding one by one with the numbering of grid R.An extension line is all arranged on each S piece, extension line be numbered 1,2 or 3.The identical extension line of all numberings links together on the whole lattice belt, and promptly all are numbered 1 extension line and link together, and all are numbered 2 extension line and also link together, and all are numbered 3 extension line also link together (not drawing among the figure).These 3 groups lead-in wires are referred to as C, are connected with 3 pins of single-chip microcomputer respectively.T is a light beam.
Because photoelectric effect, the R grid block that light beam T shines will produce electric current, and its place circuit is conduction state, and then corresponding single-chip microcomputer pin will obtain high level (perhaps low level) signal; And the R grid block that is not irradiated to does not produce electric current (or electric current is relatively very little), and its place circuit is relative state of insulation, and then corresponding single-chip microcomputer pin will obtain low level (perhaps high level) signal.Then when light beam T scans on photoelectric material grid band R, three signal input pins of single-chip microcomputer will receive the burst that high-low level alternately occurs.If Q connects high level, then when light beam T on the grid band R during to the left hand scanning direction, lattice belt will produce the burst of high-low level, the cyclic sequence of numbering of R grid block that wherein produces high level successively is as follows:
And as light beam T during to right hand scanning direction, the cyclic sequence of numbering of R grid block that wherein produces high level successively is as follows:
The cyclic sequence of this level signal can be discerned with single-chip microcomputer easily.Because light beam is left and when moving right, the cyclic sequence of level signal is different, so can tell the moving direction of light beam according to arranging of level signal sequence.For example: if be to be numbered 2 R grid block by light beam irradiates now, this photoelectricity grid block will be conduction state so, and then its extension line is exactly (suppose Q connection high level) of high level, and promptly the R grid block of high level state is numbered 2.As seen from Figure 1, when light beam moves, next irradiated R grid block will be " 3 " or " 1 ", if width of light beam is the twice of raster width, and then will be the state that " 2 and 3 " or " 2 and 1 " are irradiated to simultaneously, the promptly and then next R grid block that presents high level state be exactly " 2 and 3 " or " 2 and 1 ".Move to the left hand direction as light beam, the grid block of the next high level that and then occurs is " 2 and 3 "; Otherwise, moving to right-hand lay as light beam, the grid block of the next high level that and then occurs is just to be " 2 and 1 ".The sequence and the displacement of the historical level signals of storing memory such as employing register.So, when light beam T when photoelectricity grid R scans, single-chip microcomputer contrasts current signal according to the historical signal of remembering in the register, can judge the direction of beam flying according to set rule.If being the positive dirction of displacement to left hand, so when light beam T scans on R grid band, the width of a R grid block is whenever moved in the position of light beam T, level signal is just undergone mutation, and at this moment single-chip microcomputer is at first judged the moving direction of light beam T: if the historical level signal of contrast, single-chip microcomputer judges that light beam T has been moved to the left lattice, just on a last displacement, add the width of a R grid, otherwise, deduct the width of a R grid, thereby obtain new displacement.Then that this is new displacement, and current level signal storing memory uses when getting up for definite next displacement increment (can just can bear).
If the width of T light beam is not the twice of R raster width, get final product according to corresponding change of above method when carrying out the displacement judgement.When for example the T width of light beam is less than the R raster width, then when light beam T on the grid band R during to the left hand scanning direction, lattice belt will produce the burst of high-low level, the cyclic sequence of numbering of R grid block that wherein produces high level successively is as follows:
... 1 → sky → 2 → sky → 3 → sky → 1 → sky ...
In like manner adopt single-chip microcomputer can discern this signal, finally reach the purpose that displacement is judged.But 1,2,3 high level signals of above-mentioned signal and sky (promptly 1,2,3 low levels all) length of signal is different, if promptly T is at the uniform velocity inswept, and then 1,2, the time span of 3 high level signals and sky (promptly 1,2,3 all low level) signal is different, and this is irrational.When if the width of light beam T is not the twice of R raster width, all can there be above problem basically.So determined after the width of light beam T, the length relation of each signal has just been determined, adopts single-chip microcomputer can carry out the time span compensation, even when proper light beam T is at the uniform velocity inswept, the signal that corresponding geometrical length equates has equal time span.This is easy to realize.So in fact the width of light beam T is hard-core, can be littler than the width of R grid, also can be several times of R raster width, but light beam T width be more convenient when being the twice of R raster width.Key is that the width of light beam of light beam T must be accurate in fact, and this directly has influence on the precision that final mean annual increment movement is judged.
Above-mentioned principle is actually a kind of counter principle: the plus-minus relation when judging that direction that light beam T moves is determined counting, promptly the sign of increment promptly obtains last look with increment and former several addition.So this structure that is to say that the moving direction that can judge light beam T gets final product as long as can guarantee to discern the sign of increment.Adopt three kinds of different photoelectric material grid block of numbering just can judge the moving direction of light beam T, the photoelectric material grid block of certain difference numbering more than three kinds also can reach same purpose.This counter principle increment measurement mode makes that use is very convenient when measuring.Simultaneously, the simplification on structure and the manufacture craft helps improving reliability and precision.
For the convenience of implementing, the grid mode among Fig. 4 can be converted to the structure of parallel arranged among Fig. 5.This scheme is in fact just with 1 of being in line among Fig. 4,2,3 row's grids are taken and be arranged in to 3 grids apart, constitute the lattice belt group, be numbered all grids of 1 and all list on the lattice belt R1, be numbered all grids of 2 and all list on the lattice belt R2, be numbered all grids of 3 and all list on the lattice belt R3, and the lateral attitude of grid is constant, the delegation of only staggering downwards.Like this, the lattice belt group also is divided into a plurality of unit among Fig. 5, the distribution situation unanimity of each element grid, and each unit comprises 3 grids, is evenly distributed on 3 lattice belts.Because the same signal input part of the grid input single-chip microcomputer that numbering is identical, therefore each the bar lattice belt both sides among Fig. 5 connect two conductive electrodes respectively, article one, connect high (or low) level, shown among the figure 0, another is then as signal end input single-chip microcomputer, shown in the S1 among the figure, S2, the S3.Wherein, R1, R2 can connect high (or low) level by a shared conductive electrode 0.Such grid distribution mode can be merged into conductive strips S1 with the lead that each grid connects, S2, and S3 makes structure simpler, be easier to implement, and the photoelectricity grid can do more accurately, helps improving the resolution and the reliability of sensor.The length of laser is consistent with the length of lattice belt group, can cover three lattice belts simultaneously, when laser scans, three signals of input single-chip microcomputer can present coding " 100 ", sky, " 010 ", empty, " 001 ", empty, " 100 " successively ... and lasting circulation is gone down, just can handle the signal of this loop cycle at an easy rate according to aforementioned principles by single-chip microcomputer, thereby obtain treating the side displacement.
Consistent with the situation of Fig. 2, can also on the R of Fig. 4 lattice belt (first order lattice belt) basis, increase one-level or what lattice belt again, the cambium layer aggregated(particle) structure.(lattice belt R goes up each unit among the figure 5 grids as shown in Figure 6, principle is constant), increase a lattice belt P (second level lattice belt) again, the width of last each grid of P equals the width of the last unit of R, and light beam is at the length of every inswept unit on a R lattice belt inswept grid on P-gate lattice band just just.As natural structure, by individual, ten, hundred, thousand ... each has formed a specific number; When increase grid tape was counted, higher leveled lattice belt just was divided into several similar unit to the lattice belt of its low one-level, thereby the lattice belt of each grade has just formed carry structure clocklike.Just be equivalent to represent a position such as R in the example of Fig. 4, P just can represent ten.Certainly, R, carry between P relation is by the structures shape of grid, might not be metric.Essentially, the coding principle of above-mentioned this multistage grid is exactly when encoding, and the relation between the high rudimentary grid is the carry relation; And in the one-level lattice belt, the coding methods such as combination of grid can appear.
Fig. 7 is split as 5 lattice belts with the R lattice belt in the lattice belt shown in Figure 6, and the situation of the principle of its fractionation broken away view 4 in Fig. 5 repeats no more.
Fig. 8 is another design that grid is distributed, and it is actually between the grid of the inside of first order lattice belt and makes up, to enlarge the length of this unit of one-level.By being carried out permutation and combination, the grid in the lattice belt group (5 rows' lattice belt below among Fig. 7) of the first order among Fig. 7 can obtain structure shown in Figure 8.A unit L of the corresponding lattice belt group of a grid on the lattice belt P, from vertically, comprise the coding situation of following 5 lattice belts among the T at same position, laser scanning to 5 signals of position output formed a coding, with T is example, the signal that single-chip microcomputer receives can be considered (among the figure from top to bottom) " 01100 ", position encoded being considered as " 01010 " on the T left side, position encoded being considered as " 10001 " on T the right, grid on 5 lattice belts can be carried out permutation and combination, obtain different codings in different lengthwise positions.The length of the unit of 5 of the first order among Fig. 7 row's grids compositions just increases greatly like this, thereby can reduce the number of second level lattice belt P, has reached the purpose of simplified structure.This practice is simple, can reduce the number of conductors that lattice belt P draws.If the grid of lattice belts at different levels inside all makes up similarly, then can significantly reduce the number of lead wires of drawing, can save the limited number of ports of single-chip microcomputer on the one hand, thereby can obtain relatively large journey, can reduce the workload of single-chip microcomputer simultaneously with less extension line.
Whether the carry relation between total progression of lattice belt, the lattice belt not at the same level, grid at the same level adopt the method that splits or make up all to determine according to actual needs.Both can realize the increment type coding in the practical application like this, also can realize representing a lot of absolute encoding of counting in multistage lattice belt mode with simple coded system.
Claims (5)
1. the counter type lattice belt that is used for switched mode digital displacement transducer, it is characterized in that, grid division on the lattice belt R is a plurality of unit, each unit comprises N grid, N is more than or equal to 3, according to same order number consecutively, the grid that all numberings are identical connects same lead by conducting block S to the grid of each unit, and the input signal treatment circuit from same direction.
2. the counter type lattice belt that is used for switched mode digital displacement transducer as claimed in claim 1, it is characterized in that, also has a lattice belt P who represents high range, lattice belt P and above-mentioned lattice belt R are arranged in parallel, grid number on the lattice belt P equates with the unit number that lattice belt R is divided, and the width of last each grid of lattice belt P equals the width that lattice belt R goes up each unit.
3. be used for the counter type lattice belt of switched mode digital displacement transducer, it is characterized in that, contain N bar lattice belt, N is more than or equal to 3, the both sides of every lattice belt connect two conductive electrodes respectively, and wherein one connects high or low level, another input signal treatment circuit; The parallel distribution of described N bar lattice belt, constitute the lattice belt group, this lattice belt group is divided into the unit of a plurality of grid distribution situation unanimities along its length, and each unit includes N grid, this N grid is distributed on the N bar lattice belt, and is equally spaced along the length direction of lattice belt group.
4. the counter type lattice belt that is used for switched mode digital displacement transducer as claimed in claim 3, it is characterized in that, also has a lattice belt P who represents high range, lattice belt P and above-mentioned lattice belt group are arranged in parallel, grid number on the lattice belt P equates with the unit number that the lattice belt group is divided, and the width of last each grid of lattice belt P equals the width of each unit on the lattice belt group.
5. be used for the counter type lattice belt of switched mode digital displacement transducer, it is characterized in that, contain N bar lattice belt, N is more than or equal to 3, the both sides of every lattice belt connect two conductive electrodes respectively, and wherein one connects high or low level, another input signal treatment circuit; The parallel distribution of described N bar lattice belt constitutes the lattice belt group, and this lattice belt group is divided into the unit of a plurality of grid distribution situation unanimities along its length, and these grids are equally spaced along the length direction of lattice belt group; In each unit, the signal of the grid at the diverse location place of lattice belt group conduction back input signal treatment circuit is formed different codings; Also have a lattice belt P who represents high range, lattice belt P and described lattice belt group are arranged in parallel, and the grid number on the lattice belt P equates with the unit number that lattice belt is divided, and the width of last each grid of lattice belt P equals the width of each unit of lattice belt group.
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| CNB2005100866077A CN100365390C (en) | 2005-10-14 | 2005-10-14 | Counter-type lattice belt for switch type digital displacement sensor |
| PCT/CN2006/001347 WO2006133648A1 (en) | 2005-06-17 | 2006-06-15 | Switched mode digital displacement transducer and its application |
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| US4218615A (en) * | 1978-10-23 | 1980-08-19 | Martin Marietta Corporation | Incremental digital shaft encoder |
| CN1030794C (en) * | 1990-10-22 | 1996-01-24 | 株式会社三丰 | Displacement detector |
| CN1041558C (en) * | 1993-04-14 | 1999-01-06 | 北京超精细工程研究所 | Sealed type optical grid line displacement sensor |
| JP2003172638A (en) * | 2001-12-07 | 2003-06-20 | Harmonic Drive Syst Ind Co Ltd | Optical encoder |
| CN1181311C (en) * | 2002-04-12 | 2004-12-22 | 佳能株式会社 | Displacement information detecting device |
| CN1667366A (en) * | 2004-03-12 | 2005-09-14 | 三丰株式会社 | Optical displacement-measuring instrument |
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| CN1749700A (en) | 2006-03-22 |
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