CN1558183A - Non-contact readout type displacement transducer for digital magnetic stripe and grating strip - Google Patents
Non-contact readout type displacement transducer for digital magnetic stripe and grating strip Download PDFInfo
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- CN1558183A CN1558183A CNA2004100127244A CN200410012724A CN1558183A CN 1558183 A CN1558183 A CN 1558183A CN A2004100127244 A CNA2004100127244 A CN A2004100127244A CN 200410012724 A CN200410012724 A CN 200410012724A CN 1558183 A CN1558183 A CN 1558183A
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Abstract
The present invention, non-contact digital magnetic bar or grating bar read-out displacement sensor, features that the magnetic bar or grating bar has written length data in linear direction to constitute length data channel, the length data reading device is fixed onto displacing rod, and the length data reading device displaces along the length data channel to read out the pre-written length data or corresponding displacement. The present invention has simple structure and high measurement precision, and the grating bar is not affected by electromagnetic field and other physical environment factor and produces no environmental pollution.
Description
Technical field
The invention belongs to optical, mechanical and electronic integration digital tester device field, be specifically related to a kind of displacement transducer.
Background technology
Displacement transducer applied range, traditional displacement transducer often adopt rheostat or inductance principle.As shown in Figure 1, the rheostat displacement transducer is to adopt slider type rheostat as basic components and parts, and slide block changes the position in the effect of survey non electrical quantity (displacement of the lines), causes rheostatic resistance variations, electric current in the metering circuit is changed thereupon, and displacement to be measured is transformed into electric weight.The slide block sliding contact constantly changes the resistance of metering circuit, corresponding to slider displacement to be measured.While is because contact wear and dust etc. all can be led its contact resistance change, thus the reduction measuring accuracy.
Inductance type transducer is according to the principle work of galvanomagnetic effect, a kind of typical spiral pipe differential transformer transducer, and schematic diagram is seen Fig. 2, Fig. 3.
When iron core B mediates, e
2a=e
2b, output voltage U
Go out=e
2a-e
2b=0, on B, move e
2aIncrease e
2bReduce, B moves down, e
2aReduce e
2bIncrease, be output as U
Go out=e
2a-e
2hOpposite with afore-mentioned, output voltage is reverse, resolution was not high when the shortcoming of traditional bit displacement sensor was little displacement measurement, measuring accuracy and measurement range contradiction are difficult for solving, simultaneously the power supply lasting accuracy is required high, be subjected to structural limitations big, and be subject to the environment and the interference of electromagnetic field, there is error in the digitizing conversion of analog quantity.
Summary of the invention
The object of the present invention is to provide a kind of measuring accuracy high noncontact numeral magnetic stripe, gratings strips to read the formula displacement transducer.
To achieve these goals, technical scheme of the present invention is: noncontact numeral magnetic stripe, gratings strips are read the formula displacement transducer, it is characterized in that: on magnetic stripe or the gratings strips with length data, length data is arranged to the length data passage along rectilinear direction, length data reads components and parts and is fixed on the displacement bar, length data reads components and parts along the displacement of length data passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
Magnetic stripe, gratings strips are used widely in a lot of fields as the carrier of present information record.The present invention is with the pre-typing of this information carrier measurement data a kind of regulation, benchmark (numeral) signal, reading of data (numeral) signal in the process that the parts that read components and parts and engineering field by these signals are synchronized with the movement, thus realize the momental measurement of parts.
This sensor has been realized noncontact, the formula of reading is measured.Solved the contradiction that traditional bit displacement sensor precision and measurement range can't be coordinated.Simple in structure, because length data signal manufacture technology can reach micron order, so data volume is very big, compares with conventional sensors and can improve several magnitude, and promptly measuring accuracy is very high.Be not subjected to the interference of physical environments such as ambient electromagnetic field when adopting gratings strips, environment do not produced new pollution source yet.Be that a kind of information transmission is fast, need not analog quantity change that the effect of real-time measurement monitoring is arranged, the digital measuring method of essentially no hysteresis reflection.
Linear displacement is the most basic forms of motion, is basic measurement and control in the measurement and the monitoring of engineering field displacement, along with high-tech development is higher to the requirement of displacement measurement control.The present invention can be widely used in the field that needs such as communications and transportation (aircraft, boats and ships, vehicle, spationautics), petrochemical industry, processing equipment, engineering machinery, agricultural machinery, geographical exploration, military affairs and scientific research are measured the control displacement.
Description of drawings
Fig. 1 is a rheostat displacement transducer schematic diagram
Fig. 2 is a spiral pipe differential transformer transducer structural representation
Fig. 3 is a spiral pipe differential transformer transducer schematic diagram
Fig. 4 is the embodiment of the invention 1 structural representation
Fig. 5 is the embodiment of the invention 1 a side-looking structural representation
Fig. 6 is the embodiment of the invention 2 structural representations
Fig. 7 is the embodiment of the invention 2 side-looking structural representations
Fig. 8 is the embodiment of the invention 3 structural representations
Fig. 9 is the embodiment of the invention 3 side-looking structural representations
Figure 10 is the embodiment of the invention 4 structural representations
Figure 11 is the embodiment of the invention 4 side-looking structural representations
Among the figure: 1-magnetic stripe, 2-length data magnet passage, 3-magnetic head, 4-displacement bar, 5-gratings strips, 6-length data grating passage, 7-generating laser, 8-laser receptacle, 9-light reflecting board, 10-reflecting plate, 11-connecting link.
Embodiment
Noncontact numeral magnetic stripe, gratings strips are read the formula displacement transducer, on magnetic stripe or the gratings strips with length data, length data is arranged to the length data passage along rectilinear direction, length data reads components and parts and is fixed on the displacement bar, length data reads components and parts along the displacement of length data passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
Principle of work of the present invention:
The length data passage: when adopting magnetic stripe, length data is the magnetic recording signal, and the magnetic recording signal forms the length data passage along length distribution.When adopting gratings strips, length data is binary number or modulation wavelength or bar code, and being equally spaced along length forms the length data passage.Each data represented certain displacement.Because length data signal manufacture technology can reach micron order, so data volume is very big, compares with conventional sensors and can improve several magnitude, promptly measuring accuracy is very high.
Writing of length data: during magnetic stripe, data are written as the method for magnetic typing.Utilize existing excimer laser to write striation during striation.
Reading of length data: during magnetic stripe, adopt magnetic head to read.During gratings strips, by generating laser, receptacle or optical fiber or bar code fetch equipment (when corresponding length data is bar code).
Embodiment 1: as Fig. 4, shown in Figure 5, noncontact numeral magnetic stripe (magnetic head) is read the formula displacement transducer.On the magnetic stripe 1 with length data, the length data numeral be written as data magnetic recording signal, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data magnet passage 2, it is magnetic head 3 that length data reads components and parts, magnetic head 3 is fixed on the displacement bar 4 by connecting link 11, and length data reads components and parts magnetic head 3 along 2 displacements of length data magnet passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
Principle of work is for to write length data magnet passage 2 in advance on magnetic stripe 1, magnetic head 3 is fixed on displacement bar or the slide bar 4, and the linear displacement of displacement bar is displacement to be measured.When displacement takes place, magnetic head is with moving that tested parts are synchronized with the movement thereupon, when mobile, read the numerical data that writes in advance on the magnetic stripe synchronously, it is displacement, thereby realization noncontact numeral is read the formula displacement measurement, can adopt magnetic stripe to fix or that magnetic head is fixing is multi-form, thereby obtain the sensor of two kinds of versions, but basic functional principle is identical.
Because the numerical data precision height that magnetic stripe writes in advance, the reading accuracy of magnetic head is also very high, so the measuring accuracy of sensor is very high.Magnetic stripe can be manufactured very longly in theory, compares with slide-changing resistor and inductance type, and there is not the contradiction of little displacement measurement precision and large displacement measurement scope in this sensor.No matter great displacement in theory, measuring accuracy only depend on write in advance the precision of numerical data and the resolving accuracy of magnetic head.Directly there is not the next sum of errors hysteresis phenomenon of simulation electric weight transfer zone in reading number numerical value.
Embodiment 2: as Fig. 6, shown in Figure 7, noncontact digital transmissive formula grating (generating laser, receptacle) is read the formula displacement transducer.On the gratings strips 5 with length data, the length data numeral be written as binary number, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage 6, it is generating laser 7 and laser receptacle 8 that length data reads components and parts, generating laser 7 and laser receptacle 8 are fixed on the displacement bar 4 by connecting link 11, generating laser 7 and laser receptacle 8 lay respectively at the both sides of gratings strips 5, length data reads components and parts generating laser 7 and laser receptacle 8 along 6 displacements of length data grating passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
Principle of work is for writing length data grating passage 6 on gratings strips 5, generating laser 7 and laser receptacle 8 move (being synchronized with the movement with tested parts) with displacement bar (slide block), directly read the digital signal that writes in advance on the gratings strips, thereby the formula displacement measurement is read in the realization noncontact.According to the difference that gratings strips or Laser emission, receptacle are installed, can realize the Laser emission receptacle with displacement bar (slide block) motion or gratings strips with two kinds of different versions of displacement bar (slide block) motion.
Embodiment 3: as Fig. 8, shown in Figure 9, noncontact reflective gratings (generating laser, receptacle) is read the formula displacement transducer.On the gratings strips 5 with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage 6, it is generating laser 7 and laser receptacle 8 that length data reads components and parts, generating laser 7 and laser receptacle 8 are fixed on the displacement bar 4 by connecting link 11, generating laser 7 and laser receptacle 8 lay respectively at the homonymy of gratings strips 5, length data reads components and parts generating laser 7 and laser receptacle 8 along 6 displacements of length data grating passage during displacement, the opposite side of the gratings strips 5 relative with generating laser 7 and laser receptacle 8 is provided with light reflecting board 9, reads the length data that writes in advance promptly corresponding to displacement.
Pre-imprinting has modulation wavelength on the bar rule shape body that the good material of light transmissions such as engineering plastics is made, and forms pre-typing data channel, and length dimension is according to the measurement requirement seriation.Fixed laser emission, receptacle on the displacement bar, also with light reflecting board 9, the light wave that generating laser 7 sends is accepted by laser receptacle 8 by reflecting plate on the gratings strips.When generating laser 7 moves (being synchronized with the movement with tested parts) with displacement bar, promptly record shift value.With aforementioned, according to the sensor of two kinds of versions of one-tenth different capable of being combined of the arrangement form between generating laser and the displacement bar (slide block).
Embodiment 4: as Figure 10, shown in Figure 11, noncontact transflective grating (generating laser, laser receptacle) is read the formula displacement transducer.On the gratings strips 5 with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage 6, it is generating laser 7 and laser receptacle 8 that length data reads components and parts, generating laser 7 and laser receptacle 8 are fixed on the displacement bar 4 by connecting link 11, generating laser 7 is positioned at the side of gratings strips 5, be provided with reflecting plate 10 with generating laser 7 relevant positions in the gratings strips 5,10 one-tenth 45 degree of reflecting plate are towards generating laser 7 and length data grating passage 6, laser receptacle 8 is positioned at length data grating passage 6 upper ends of gratings strips 5, length data reads components and parts laser receptacle 8 along 6 displacements of length data grating passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
On gratings strips 5, write displacement data in advance, also be shaped on reflecting plate 10 in the gratings strips 5, the laser of generating laser 7 is by reflection, accept by laser receptacle 8 after the transmission, generating laser and receptacle read raster data during with displacement bar (slide block) synchronous shift (being synchronized with the movement with tested parts), finish the measurement of displacement.In like manner according to generating laser and receptacle the form that connects, the sensor of two kinds of versions of one-tenth capable of being combined with displacement bar (slide block).
Embodiment 5: basic identical with embodiment 2 or embodiment 3 or embodiment 4, difference only is: length data reads components and parts generating laser 7 and laser receptacle 8 is replaced by optical fiber.
Embodiment 6: when adopting gratings strips, on the gratings strips with length data, length data is a bar code, length data is arranged to the length data passage along rectilinear direction, it is the bar code fetch equipment that length data reads components and parts, and the bar code fetch equipment is positioned at a side of bar code, and length data reads components and parts and is fixed on the displacement bar, length data reads components and parts along the displacement of length data passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
Claims (8)
1. noncontact numeral magnetic stripe, gratings strips are read the formula displacement transducer, it is characterized in that: on magnetic stripe or the gratings strips with length data, length data is arranged to the length data passage along rectilinear direction, length data reads components and parts and is fixed on the displacement bar, length data reads components and parts along the displacement of length data passage during displacement, reads the length data that writes in advance promptly corresponding to displacement.
2. noncontact numeral magnetic stripe according to claim 1, gratings strips are read the formula displacement transducer, it is characterized in that: described magnetic stripe (1) is gone up with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is length data magnet passage (2), it is magnetic head (3) that length data reads components and parts, magnetic head (3) is fixed on the displacement bar (4) by connecting link (11), length data reads components and parts magnetic head (3) along length data magnet passage (2) displacement during displacement, reads the length data that writes in advance promptly corresponding to displacement.
3. noncontact numeral magnetic stripe according to claim 1, gratings strips is read the formula displacement transducer, it is characterized in that: described gratings strips (5) goes up with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage (6), it is generating laser (7) and laser receptacle (8) that length data reads components and parts, generating laser (7) and laser receptacle (8) are fixed on the displacement bar (4) by connecting link (11), generating laser (7) and laser receptacle (8) lay respectively at the both sides of gratings strips (5), length data reads components and parts generating laser (7) and laser receptacle (8) along length data grating passage (6) displacement during displacement, reads the length data that writes in advance promptly corresponding to displacement.
4. noncontact numeral magnetic stripe according to claim 1, gratings strips is read the formula displacement transducer, it is characterized in that: described gratings strips (5) goes up with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage (6), it is generating laser (7) and laser receptacle (8) that length data reads components and parts, generating laser (7) and laser receptacle (8) are fixed on the displacement bar (4) by connecting link (11), generating laser (7) and laser receptacle (8) lay respectively at the homonymy of gratings strips (5), length data reads components and parts generating laser (7) and laser receptacle (8) along length data grating passage (6) displacement during displacement, the opposite side of the gratings strips (5) relative with laser receptacle (8) with generating laser (7) is provided with light reflecting board (9), reads the length data that writes in advance promptly corresponding to displacement.
5. noncontact numeral magnetic stripe according to claim 1, gratings strips is read the formula displacement transducer, it is characterized in that: described gratings strips (5) goes up with length data, length data is arranged to the length data passage along rectilinear direction, the length data passage is a length data grating passage (6), it is generating laser (7) and laser receptacle (8) that length data reads components and parts, generating laser (7) and laser receptacle (8) are fixed on the displacement bar (4) by connecting link (11), generating laser (7) is positioned at the side of gratings strips (5), be provided with reflecting plate (10) with generating laser (7) relevant position in the gratings strips (5), reflecting plate (10) becomes 45 degree towards generating laser (7) and length data grating passage (6), laser receptacle (8) is positioned at length data grating passage (6) upper end of gratings strips (5), length data reads components and parts laser receptacle (8) along length data grating passage (6) displacement during displacement, reads the length data that writes in advance promptly corresponding to displacement.
6. read the formula displacement transducer according to claim 3 or 4 or 5 described noncontacts numeral magnetic stripes, gratings strips, it is characterized in that: the data of described length data are binary number or modulation wavelength or bar code.
7. read the formula displacement transducer according to claim 3 or 4 or 5 described noncontacts numeral magnetic stripes, gratings strips, it is characterized in that: length reads components and parts generating laser (7) and laser receptacle (8) can be replaced by optical fiber.
8. noncontact numeral magnetic stripe according to claim 1, gratings strips are read the formula displacement transducer, it is characterized in that: when adopting gratings strips, when the data of length data were bar code, it was the bar code fetch equipment that length reads components and parts, and the bar code fetch equipment is positioned at a side of bar code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012724 CN1249402C (en) | 2004-02-13 | 2004-02-13 | Non-contact readout type displacement transducer for digital magnetic stripe and grating strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012724 CN1249402C (en) | 2004-02-13 | 2004-02-13 | Non-contact readout type displacement transducer for digital magnetic stripe and grating strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1558183A true CN1558183A (en) | 2004-12-29 |
| CN1249402C CN1249402C (en) | 2006-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410012724 Expired - Fee Related CN1249402C (en) | 2004-02-13 | 2004-02-13 | Non-contact readout type displacement transducer for digital magnetic stripe and grating strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1249402C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042818A (en) * | 2009-10-14 | 2011-05-04 | 德雷尔激光测量技术股份有限公司 | Apparatus for checking the accuracy of a circular path of a machine tool performed by a work spindle and/or a machine table |
| CN104121936A (en) * | 2013-04-29 | 2014-10-29 | 艾默生电气（美国）控股公司（智利）有限公司 | Dynamic transducer with digital output and method for use |
| CN106863015A (en) * | 2017-02-24 | 2017-06-20 | 武汉理工大学 | A kind of fiber grating micro-displacement sensor and the machine pillar with the sensor |
-
2004
- 2004-02-13 CN CN 200410012724 patent/CN1249402C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042818A (en) * | 2009-10-14 | 2011-05-04 | 德雷尔激光测量技术股份有限公司 | Apparatus for checking the accuracy of a circular path of a machine tool performed by a work spindle and/or a machine table |
| CN104121936A (en) * | 2013-04-29 | 2014-10-29 | 艾默生电气（美国）控股公司（智利）有限公司 | Dynamic transducer with digital output and method for use |
| CN106863015A (en) * | 2017-02-24 | 2017-06-20 | 武汉理工大学 | A kind of fiber grating micro-displacement sensor and the machine pillar with the sensor |
| CN106863015B (en) * | 2017-02-24 | 2018-11-23 | 武汉理工大学 | A kind of fiber grating micro-displacement sensor and the machine pillar with the sensor |
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| Publication number | Publication date |
|---|---|
| CN1249402C (en) | 2006-04-05 |
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Granted publication date: 20060405 |