CN205619867U - Vortex lattice displacement sensor with semi -circular reflection conductor in both sides - Google Patents
Vortex lattice displacement sensor with semi -circular reflection conductor in both sides Download PDFInfo
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- CN205619867U CN205619867U CN201620004087.4U CN201620004087U CN205619867U CN 205619867 U CN205619867 U CN 205619867U CN 201620004087 U CN201620004087 U CN 201620004087U CN 205619867 U CN205619867 U CN 205619867U
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Abstract
The utility model discloses a new vortex lattice sensor that has the semi -circular metal reflection conductor in both sides, the sensor comprises measuring coil, reflection conductor, base plate and measuring circuit. The sensor adopts the preparation of PCB technology, under the limited condition of sensor design size, can be specific regular shape and size through changing the conductor, improves the sensitivity and the precision of sensor, need not to improving the size that the precision increases the vortex lattice sensor. Especially when adopting the semi -circular conductor that reflects in both sides, semicircle diameter is unanimous with reflection conductor width, and two semicircle extreme points are tangent with two straight line edges in front and back of reflection conductor, have the highest measurement accuracy this moment. This kind of method has characteristics such as with low costs, production cycle weak point, reliable and simple, does not need complicated PCB manufacture craft, can satisfy mass production's requirement.
Description
Technical field
The utility model relates to the device of a kind of measuring instrument technical field, a kind of vortex lattice displacement transducer with semicircle reflective conductive.
Background technology
Various measurers at existing manufacturing industry onsite application generally develop to directions such as digitized, wide range, absolute codes, and more and more higher to waterproof and dustproof, antidetonation, antimagnetic requirement.
Vortex lattice displacement transducer is to have been based on the wide range of horizontal variable area formula eddy current effect, waterproof displacement sensor, such as Chinese patent " Water proof electronic digital display callipers " (number of patent application 03115904.4), " having the great-scale displacement sensor of water-proof function " (number of patent application 200310122731.5), " having the vortex lattice absolute location sensor of error average effect " (number of patent application 200810040920.0).These several sensors utilize horizontal eddy current effect to form grating displacement transducer, have outstanding waterproof ability, and realize absolute position signal output by many code channels phase contrast technology.Meanwhile, efficiently solve the tradition disadvantage that current vortex sensor volume is big, power consumption is big, be used successfully among the utensils such as Water proof electronic digital display callipers.
But, due to the aspect such as non-linear of current vortex self, this sensor yet suffers from the problem that precision is the highest.The non-sinusoidal nature that particularly laterally eddy current effect itself exists causes displacement measurement to pass through and there is obvious nonlinearity erron, and becomes cyclically-varying rule.The checking of these defects constrains the further genralrlization application of vortex lattice sensor.
Utility model content
This utility model is for deficiencies of the prior art, a kind of vortex lattice displacement transducer with semicircle reflective conductive is provided, improve for deficiency and the defect of vortex lattice in prior art, various waterproof type electronic measuring appliance can be suitable for, can reduce the reliability of the requirement to technique of the existing vortex lattice sensor and the absolute fix improving sensor further, solid foundation is established in the production quantitatively for vortex lattice sensor.
This utility model is achieved through the following technical solutions:
Absolute displacement transducer of the present utility model includes a fixed grid, a moving grid and a Circuits System.Wherein: moving grid is connected with Circuits System, can move left and right relative to fixed grid.
Described fixed grid can use printed circuit board process to make, and includes the two kinds of code channels being parallel to each other: measure code channel and coding code channel.Described code channel of measuring is provided with several independences and is evenly distributed and contour metallic conductor, and the spacing of adjacent metal conductor is to measure the wavelength of code channel.Described encoding also is provided with several independent metallic conductors on code channel, but the contour skewness of these metals, and the regularity of distribution meets certain coding rule.
Described moving grid can use printed circuit board process to make, and includes the two kinds of code channels being parallel to each other equally: measure code channel and coding code channel.Arranging a series of planar coil on each code channel, the position of coil is corresponding with the code channel of fixed grid with the regularity of distribution.Measuring on code channel, planar coil quantity is generally even number, and the adjacent centre distance between planar coil is equal to the integral multiple measuring code channel half-wavelength.On location coding code channel, the quantity of planar coil determines the figure place of coding, and the centre distance between adjacent two planar coils is equal to the integral multiple of coding code channel half-wavelength.
When moving grid moves to arbitrarily certain position relative to fixed grid, the a series of planar coils encoding code channel on moving grid are respectively at different corresponding statess (planar coil and metallic conductor stagger or the most relatively, completely for intermediateness) from metallic conductor, the analogue signal that these amplitudes are the most different becomes low and high level signal after being digitized into processing, it is hereby achieved that digital coding result.By appropriate design coding rule, it is ensured that in the range of whole measurement, coding is unique, it is possible to realizes absolute coding, and then realizes the location of sensor absolute position.
With existing vortex lattice sensor except that: the metallic reflection conductor of vortex lattice sensor of the present utility model uses a kind of both sides semi-circular shape, i.e. half diameter of a circle is just the most equal with the length of reflective conductive, and before and after two end points of semicircle and reflective conductive, two linear edges are tangent.Now, vortex lattice sensor has optimal certainty of measurement.
Accompanying drawing explanation
By reading the detailed description made non-limiting example with reference to the following drawings, feature of the present utility model, purpose and advantage will become more fully apparent:
Fig. 1 is vortex lattice sensor measurement code channel structure chart.
Fig. 2 is both sides semicircle reflective conductive specific design and layout.
Fig. 3 is the vortex lattice Nonlinear Error of Transducer selecting different size reflective conductive corresponding.
Inductance change curve comparison diagram when Fig. 4 is for using rectangle, both sides semicircle reflective conductive.
In figure, 1 is reflective conductive, and 2 is substrate, and 3 is differential coil group.A is metallic conductor length, and b is metallic conductor width, and c is measuring coil length, and d is measuring coil width, and λ is gap periods (i.e. measuring wavelength).
Detailed description of the invention
Elaborating with embodiment below in conjunction with the accompanying drawings, the present embodiment is implemented under premised on technical solutions of the utility model, but protection domain of the present utility model is not limited to following embodiment.
Difference structure vortex lattice sensor construction figure sees Fig. 1, sensor mainly includes metallic reflection conductor 1, substrate 2 and the differential coil 3 arranged at equal intervals, differential coil 3 is made up of two groups of coils, and its coil and coil constitute one group of coil, and coil and coil are that another organizes coil.The phase often organizing measuring coil measures the 1/2 of wavelength, and the phase of different group measuring coils measures the 1/4 of wavelength, and metallic conductor 1 is arranged on substrate at equal intervals according to measuring wavelength.Such as, two groups of coil dimensions of moment sensor can be length c=3mm, width d=3mm, and coil and metallic conductor fore-and-aft distance are 0.5mm.
Fig. 2 is the semicircular metallic reflection in the both sides conductor of design, and the two ends on conductor width direction use semi-circular shape, and its diameter is exactly equal to the length of reflective conductive 1, and length a of reflective conductive 1 is slightly larger than the width c of coil 3.Such as, for above-mentioned coil dimension, reflective conductive size elects length a=3.2mm as, and the width b of reflective conductive 1 is the maximum b=5.8mm that sensor allows, and both sides half diameter of a circle is also 3.2mm, and radius is 1.6mm.
Fig. 3 is the nonlinearity erron relation curve with reflective conductive 1 size of this vortex lattice sensor, it is found that when length a of reflective conductive 1 is slightly larger than length c of coil 3, when the width of reflective conductive is tried one's best big, vortex lattice sensor has the nonlinearity erron of minimum, and certainty of measurement is the highest.
Choose rectangular reflection conductor and both sides semicircle reflective conductive, such as length a=3.2mm, the width b=5.8mm of identical length and width size simultaneously.Contrasting the inductance change curve when coil is relatively with metallic conductor generation displacement, result is as shown in Figure 4.Can be seen that under identical size, when selecting both sides semicircle reflective conductive, the inductance value recorded is bigger, measures sensitivity higher.
A kind of new vortex lattice sensor metal conductor shape of this utility model major design, thus reach the optimization to sensor, improve the sensitivity of sensor, nonlinear error reduction.
Claims (2)
1. having a vortex lattice displacement transducer for both sides semicircle reflective conductive, it includes fixed grid, moving grid and Circuits System；Moving grid is connected with Circuits System, can move left and right relative to fixed grid；Fixed grid includes the two kinds of code channels-measurement code channel being parallel to each other and coding code channel, measure code channel be provided with several independences and be evenly distributed and contour metallic conductor, also being provided with several independent metallic conductors on coding code channel, these metals are contour, and the regularity of distribution meets certain coding rule；Described sensor is characterised by: reflective conductive to be shaped as both sides semicircle.
The vortex lattice displacement transducer with both sides semicircle reflective conductive the most according to claim 1, is characterized in that: described both sides half diameter of a circle is equal with the length of reflective conductive, and before and after two end points of semicircle and reflective conductive, two linear edges are tangent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620004087.4U CN205619867U (en) | 2016-01-06 | 2016-01-06 | Vortex lattice displacement sensor with semi -circular reflection conductor in both sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620004087.4U CN205619867U (en) | 2016-01-06 | 2016-01-06 | Vortex lattice displacement sensor with semi -circular reflection conductor in both sides |
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| CN205619867U true CN205619867U (en) | 2016-10-05 |
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| CN201620004087.4U Expired - Fee Related CN205619867U (en) | 2016-01-06 | 2016-01-06 | Vortex lattice displacement sensor with semi -circular reflection conductor in both sides |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767366A (en) * | 2016-12-05 | 2017-05-31 | 上海砺晟光电技术有限公司 | Full digital vortex gate sensor based on micro-coil |
| CN112729089A (en) * | 2020-12-28 | 2021-04-30 | 无锡广联数字传感科技有限公司 | Displacement sensor applied to multiple occasions |
-
2016
- 2016-01-06 CN CN201620004087.4U patent/CN205619867U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767366A (en) * | 2016-12-05 | 2017-05-31 | 上海砺晟光电技术有限公司 | Full digital vortex gate sensor based on micro-coil |
| CN112729089A (en) * | 2020-12-28 | 2021-04-30 | 无锡广联数字传感科技有限公司 | Displacement sensor applied to multiple occasions |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20210106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |