CN103487077A - Optical fiber output photoelectric encoder - Google Patents
Optical fiber output photoelectric encoder Download PDFInfo
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- CN103487077A CN103487077A CN201310418445.7A CN201310418445A CN103487077A CN 103487077 A CN103487077 A CN 103487077A CN 201310418445 A CN201310418445 A CN 201310418445A CN 103487077 A CN103487077 A CN 103487077A
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Abstract
An optical fiber output photoelectric encoder comprises a light source, a code disk, a supporting shaft, a slit disk, a receiver and a decoder. The code disk and the slit disk are arranged on the supporting shaft. The optical fiber output photoelectric encoder further comprises at least one optical fiber and at least one output optical fiber, wherein the input optical fiber is matched and connected with the light source, and the output optical fiber is matched and connected with the receiver. The light signals emitted by the light source are transmitted to the code disk through one input optical fiber, the code disk can modulate the light signals and transmit the modulated light signals to the receiver through one output optical fiber or a plurality of output optical fibers, and the decoder can decode the signals received by the receiver to obtain the corresponding position of the code disk. The photoelectric encoder further comprises an encoder casing, the light source, the input fiber, the output optical fibers, the receiver and the decoder are arranged outside the encoder casing, and the code disk, the supporting shaft and the slit disk are arranged in the encoder casing. The optical fiber output photoelectric encoder has the advantages of solving the problem that the photoelectric encoder is limited to be used in special and severe conditions of with high-pressure, electric, corrosive, flammable, combustible and waterproof requirements.
Description
Technical field
The present invention relates to the Fibre Optical Sensor field of measuring technique, be specifically related to a kind of photoelectric encoder of optical fiber output.
Background technology
Photoelectric encoder is a kind of angle (angular velocity) pick-up unit, angular metric by input shaft, utilize photoelectricity transformation principle to convert corresponding electric pulse or digital quantity to, there is volume little, precision is high, reliable operation, the advantages such as interface digitizing, being widely used in numerically-controlled machine, panoramic table, servodrive, robot, radar, military target mensuration etc. needs in the device and equipment of detection angles.Photoelectric encoder is comprised of grating disc and photoelectric detection system, grating disc is to open several slots on the plectane of certain diameter decile, because photoelectric code disk and motor are coaxial, during the motor rotation, the synchronized rotation of grating disc and motor, the pick-up unit formed through electronic components such as light emitting diodes detects the some pulse signals of output, and by the unit of account time, the number of photoelectric encoder output pulse just can reflect the rotating speed of current motor.
As shown in Figure 1, existing photoelectric encoder is comprised of a set of light source 1, code-disc 3, back shaft 4, slit plate 5, receiver 7, demoder 8, and slit plate 5 is usually also referred to as detecting grating, and receiver 7 also becomes photo-detector usually.When the information measured source drives tested back shaft 4 rotation, the code form of code-disc 3 corresponding location of readings constantly changes, and by light source 1 illumination, receiver 7 receives optical information and demodulates tested back shaft 4 rotation angle displacement informations by demoder 8 more like this.Existing photoelectric encoder is because active device (comprising the photoelectric conversion units such as light source 1, receiver 7, demoder 8) directly is placed in test environment, electrical insulation capability and anti-electromagnetic interference capability requirement to device are high, and the test under high pressure, electromagnetic induction, noise, corrosion rugged surroundings and Flammable atmosphere is restricted.
Summary of the invention
The technical problem to be solved in the present invention is, there is above-mentioned electricity work parts defect affected by environment for existing photoelectric encoder, a kind of photoelectric encoder and measuring method thereof of optical fiber output are provided, eliminate this defect, solve scrambler and use restricted problem under high pressure, the special mal-condition such as electric, burn into is inflammable and explosive, waterproof requirement is high.
The present invention solves the problems of the technologies described above adopted technical scheme to be:
A kind of photoelectric encoder of optical fiber output, comprise light source, code-disc, back shaft, slit plate, receiver, demoder, code-disc and slit plate are arranged on back shaft, it is characterized in that: also comprise at least one input optical fibre and at least one output optical fibre, described input optical fibre and light source are in mating connection, and output optical fibre and receiver are in mating connection; The light signal that described light source emits reaches code-disc via an input optical fibre, and code-disc will be transferred to receiver by another one or more output optical fibre after optical signal modulation, and the light signal that described demoder receives receiver is decoded, and obtains the relative position of code-disc.
Press such scheme, this photoelectric encoder also comprises an encoder housing, described light source, input optical fibre, output optical fibre, receiver, demoder are placed in the encoder housing outside, code-disc, back shaft, slit plate are placed in encoder housing inside, one end of input optical fibre is fixedly connected with or is flexibly connected with encoder housing inside by the joints of optical fibre, and an end of output optical fibre is fixedly connected with or is flexibly connected with encoder housing inside by the joints of optical fibre.
Press such scheme, described input optical fibre, output optical fibre adopt silica fibre or multicomponent glass optical fiber or plastic optical fiber.
Press such scheme, described input optical fibre, output optical fibre can derive as multifiber or fibre ribbon, fibre bundle, multifiber cable.
Press such scheme, between described input optical fibre and code-disc and between slit plate and output optical fibre, be equipped with collimating apparatus.
Press such scheme, also be provided with condenser lens or focus lens group between described slit plate and output optical fibre.
Press such scheme, also be provided with collimator apparatus between described input optical fibre and code-disc, also be provided with focalizer between described slit plate and output optical fibre.
Press such scheme, described light source adopts infrarede emitting diode, laser diode, laser instrument or Halogen lamp LED.
Press such scheme, described receiver is selected the silicon phototriode.
Press such scheme, described code-disc adopts rotation or translational type, and the diameter of described slit plate, the number of turns are identical with diameter, the number of turns of code-disc.
The measuring principle of photoelectric encoder of the present invention: the light that light source emits reaches via single or many input optical fibres near code-disc, and the code-disc output signal adopts single or many output optical fibres receptions, and the light signal of reception reaches receiver via output optical fibre; The light signal that described demoder receives receiver is decoded, and obtains the relative position of code-disc.As required, also input optical fibre, output optical fibre can be derived as multifiber or fibre ribbon, fibre bundle, multifiber cable.
The beneficial effect that the present invention compared with prior art has:
1, increased the input optical fibre more than two or two in the light path of prior art, output optical fibre, respectively increased input optical fibre after light source He before receiver, output optical fibre, by photoelectric coding unit (code-disc, back shaft, slit plate) and active device (light source, receiver, demoder) separate, active device in whole light path is placed in outside test environment, photoelectric coded disk is separated with photoelectric conversion section, and utilize optical fiber to connect, utilize the low decay of optical fiber, the characteristic of high bandwidth, realize the remote of photoelectric coding signal, two-forty, anti-electromagnetic interference (EMI) output.
2, optical fiber itself consists of dielectric, has the advantage that electrical insulation capability is good, safe and reliable, and without power drives, measuring junction, without power supply, therefore is suitable for using in inflammable and explosive oil, gas, Chemical Manufacture; Can increase the creepage distance of input optical fibre, output optical fibre (optical cable), strengthen the insulating property that signal connects, being particularly useful for deep water measurement or transformer station, current conversion station, high voltage switchyard etc. need to be monitored etc. and to have insulativity to require place signals such as the rotation of high-tension apparatus end, angle, translations, monitor signal need to be transferred to low pressure by the mode of insulation and monitor a side, can be for the wind-power electricity generation monitor speed;
3, adopting quartz glass optical fiber is as Transmission Fibers, due to material-quartz of making optical fiber, to have high chemical stability good, corrosion resistance is strong, therefore the photoelectric encoder of optical fiber output is suitable for using in than rugged surroundings, quartz glass optical fiber also has advantages of that as Transmission Fibers loss is little and transmission capacity is large, can realize long-distance remote control monitoring and multiple spot distributed measurement, can be used in strong electromagnetic environment and high pressure, noise, corrosion rugged surroundings and inflammable and explosive oil, gas, Chemical Manufacture.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing photoelectric encoder;
Fig. 2 is the structural representation of the photoelectric encoder of optical fiber output of the present invention;
Fig. 3 is the partial structurtes schematic diagram of the photoelectric encoder of the embodiment of the present invention 1 optical fiber output, and the light source 1 identical with Fig. 2, receiver 7, demoder 8 are omitted in Fig. 3;
Fig. 4 is the partial structurtes schematic diagram of the photoelectric encoder of the embodiment of the present invention 2 optical fiber outputs, and the light source 1 identical with Fig. 2, receiver 7, demoder 8 are omitted in Fig. 4;
Fig. 5 is the partial structurtes schematic diagram of the photoelectric encoder of the embodiment of the present invention 3 optical fiber outputs, and the light source 1 identical with Fig. 2, receiver 7, demoder 8 are omitted in accompanying drawing 3;
In figure, 1-light source, 2-input optical fibre, 3-code-disc, 4-back shaft, 5-slit plate, 6-output optical fibre, 7-receiver, 8-demoder, 9-encoder housing, the 10-joints of optical fibre, 11-collimating apparatus, 13-condenser lens, 14-collimator apparatus, 15-focalizer.
Embodiment
Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is described further.
Shown in Fig. 2, the photoelectric encoder of optical fiber output of the present invention, comprise light source 1, code-disc 3, back shaft 4, slit plate 5, receiver 7, demoder 8, code-disc 3 is arranged on back shaft 4 with slit plate 5, it is characterized in that: also comprise at least one input optical fibre 2 and at least one output optical fibre 6, described input optical fibre 2 is in mating connection with light source 1, and output optical fibre 6 is in mating connection with receiver 7; The light signal that described light source 1 emits reaches code-disc 3 via an input optical fibre 2, code-disc 3 will be transferred to receiver 7 by another one or more output optical fibre 6 after optical signal modulation, the light signal that 8 pairs of receivers of described demoder 7 receive is decoded, and obtains the relative position of code-disc 3.
This photoelectric encoder also comprises an encoder housing 9, described light source 1, input optical fibre 2, output optical fibre 6, receiver 7, demoder 8 are placed in encoder housing 9 outsides, code-disc 3, back shaft 4, slit plate 5 are placed in encoder housing 9 inside, one end of input optical fibre 2 is fixedly connected with or is flexibly connected with encoder housing 9 inside by the joints of optical fibre 10, and an end of output optical fibre 6 is fixedly connected with or is flexibly connected with encoder housing 9 inside by the joints of optical fibre 10.
Embodiment 1: the photoelectric encoder of exporting for the optical fiber of the rotational parameters under oil gas or corrosion environment.
With reference to Fig. 3, embodiment 1 is to have increased by two collimating apparatuss 11 with the structural difference of Fig. 2, lay respectively between input optical fibre 2 and code-disc 3, and between slit plate 5 and output optical fibre 6.
Embodiment 2: for the photoelectric encoder of the optical fiber output of measuring rotation under high voltage environment and angle parameter.
With reference to Fig. 4, embodiment 2 is to have increased condenser lens 13 or focus lens group with the structural difference of Fig. 2, between input optical fibre 2 and code-disc 3.
Embodiment 3: for the photoelectric encoder of the optical fiber output of measuring rotation under deep-marine-environment and angle parameter.
With reference to Fig. 5, the structural difference of embodiment 3 and Fig. 2 is also to be provided with collimator apparatus 14 between input optical fibre 2 and code-disc 3, between described slit plate 5 and output optical fibre 6, also is provided with focalizer 15.
Input optical fibre 2, output optical fibre 6 are fixedly connected with encoder housing 9 inside by the joints of optical fibre 10, and input optical fibre 2, output optical fibre 6 also can be made the form of fibre bundle or fiber array.In embodiment, input optical fibre 2, output optical fibre 6 are made into the light-duty protection optical cable in seabed, and center is loose sleeve structure, wrap up in metal outward and strengthen steel wire, medium density polyethylene sheath, metal tape and polyethylene sheath.Input optical fibre 2, output optical fibre 6 can be repetitive, and quantity is relevant with the scrambler precision.Unit is the pressure that the shell of encoder housing 9 can bear 12000PSI under water, is enough to bear 8000m depths seawater pressure.This embodiment transmits the test volume under deep-marine-environment mode by light passes to the monitoring side on sea level, can be used for the test environment that the isolation of needs electricity maybe can not be switched on.Existing sensor is charged, need seal isolation, poor reliability with high costs, and this programme use instead optical fiber as transmission medium after, can adopt the design of open type, less demanding to what seal, reliability is strong, even seawater enters housing 9, scrambler can not damage immediately yet, still can keep in a long time work, and cost is cheaper than existing sensor.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the photoelectric encoder of optical fiber output, comprise light source (1), code-disc (3), back shaft (4), slit plate (5, receiver (7), demoder (8), code-disc (3) is arranged on back shaft (4) with slit plate (5), it is characterized in that: also comprise at least one input optical fibre (2) and at least one output optical fibre (6), described input optical fibre (2) is in mating connection with light source (1), and output optical fibre (6) is in mating connection with receiver (7); The light signal that described light source (1) emits reaches code-disc (3) via an input optical fibre (2), code-disc (3) will be transferred to receiver (7) by another one or more output optical fibre (6) after optical signal modulation, the light signal that described demoder (8) receives receiver (7) is decoded, and obtains the relative position of code-disc (3).
2. the photoelectric encoder that optical fiber as claimed in claim 1 is exported, it is characterized in that: this photoelectric encoder also comprises an encoder housing (9), described light source (1), input optical fibre (2), output optical fibre (6), receiver (7), demoder (8) is placed in encoder housing (9) outside, code-disc (3), back shaft (4), slit plate (5) is placed in encoder housing (9) inside, one end of input optical fibre (2) is fixedly connected with or is flexibly connected with encoder housing (9) inside by the joints of optical fibre (10), one end of output optical fibre (6) is fixedly connected with or is flexibly connected with encoder housing (9) inside by the joints of optical fibre (10).
3. the photoelectric encoder of optical fiber output as claimed in claim 1, is characterized in that: described input optical fibre (2), output optical fibre (6) employing silica fibre or multicomponent glass optical fiber or plastic optical fiber.
4. the photoelectric encoder of as described as claim 1 or 3 optical fiber output is characterized in that: described input optical fibre (2), output optical fibre (6) can derive as multifiber or fibre ribbon, fibre bundle, multifiber cable.
5. the photoelectric encoder of optical fiber output as claimed in claim 1, is characterized in that: between described input optical fibre (2) and code-disc (3) and between slit plate (5) and output optical fibre (6), be equipped with collimating apparatus (11).
6. the photoelectric encoder of optical fiber output as claimed in claim 1, is characterized in that: between described slit plate (5) and output optical fibre (6), also be provided with condenser lens (13) or focus lens group.
7. the photoelectric encoder of optical fiber output as claimed in claim 1, is characterized in that: also be provided with collimator apparatus (14) between described input optical fibre (2) and code-disc (3), between described slit plate 5 and output optical fibre (6), also be provided with focalizer (15).
8. the photoelectric encoder of optical fiber output as claimed in claim 1, is characterized in that: described light source (1) employing infrarede emitting diode, laser diode, laser instrument or Halogen lamp LED.
9. the photoelectric encoder that optical fiber as claimed in claim 1 is exported, it is characterized in that: described receiver (7) is selected the silicon phototriode.
10. the photoelectric encoder of optical fiber as claimed in claim 1 output, it is characterized in that: described code-disc (3) adopts rotation or translational type, and the diameter of described slit plate (5), the number of turns are identical with diameter, the number of turns of code-disc (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310418445.7A CN103487077B (en) | 2013-09-13 | 2013-09-13 | The photoelectric encoder that a kind of optical fiber exports |
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| CN201310418445.7A CN103487077B (en) | 2013-09-13 | 2013-09-13 | The photoelectric encoder that a kind of optical fiber exports |
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| CN103487077B CN103487077B (en) | 2016-03-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121937A (en) * | 2014-08-14 | 2014-10-29 | 吕宏强 | All-optical fiber transmission type rotary coder |
| CN105973278A (en) * | 2016-06-08 | 2016-09-28 | 北京轩宇智能科技有限公司 | Servo motor and irradiation-resistant photoelectric encoder |
| CN107331739A (en) * | 2017-05-17 | 2017-11-07 | 西安科锐盛创新科技有限公司 | A kind of infrared optical module |
| CN108731707A (en) * | 2018-06-04 | 2018-11-02 | 大族激光科技产业集团股份有限公司 | Double incremental encoders measure absolute position method and apparatus |
| CN109341733A (en) * | 2018-10-22 | 2019-02-15 | 珠海格力电器股份有限公司 | Photoelectric encoder |
| CN111238407A (en) * | 2020-01-30 | 2020-06-05 | 华东交通大学 | Sensor system for measuring angle of contact net isolating switch knife |
| CN112781528A (en) * | 2019-11-07 | 2021-05-11 | 华东交通大学 | Railway isolator divide-shut brake monitoring system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121937A (en) * | 2014-08-14 | 2014-10-29 | 吕宏强 | All-optical fiber transmission type rotary coder |
| CN105973278A (en) * | 2016-06-08 | 2016-09-28 | 北京轩宇智能科技有限公司 | Servo motor and irradiation-resistant photoelectric encoder |
| CN107331739A (en) * | 2017-05-17 | 2017-11-07 | 西安科锐盛创新科技有限公司 | A kind of infrared optical module |
| CN108731707A (en) * | 2018-06-04 | 2018-11-02 | 大族激光科技产业集团股份有限公司 | Double incremental encoders measure absolute position method and apparatus |
| CN108731707B (en) * | 2018-06-04 | 2021-01-01 | 大族激光科技产业集团股份有限公司 | Method and device for measuring absolute position by double-increment type encoder |
| CN109341733A (en) * | 2018-10-22 | 2019-02-15 | 珠海格力电器股份有限公司 | Photoelectric encoder |
| CN112781528A (en) * | 2019-11-07 | 2021-05-11 | 华东交通大学 | Railway isolator divide-shut brake monitoring system |
| CN111238407A (en) * | 2020-01-30 | 2020-06-05 | 华东交通大学 | Sensor system for measuring angle of contact net isolating switch knife |
| CN111238407B (en) * | 2020-01-30 | 2020-12-01 | 华东交通大学 | Sensor system for measuring angle of contact net isolating switch knife |
| WO2021151340A1 (en) * | 2020-01-30 | 2021-08-05 | 华东交通大学 | Sensor system for measuring knife angle of catenary isolation switch |
| US11501935B1 (en) | 2020-01-30 | 2022-11-15 | East China Jiaotong University | Sensor system for measuring angle of gate of isolating switch of overhead lines |
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| CN103487077B (en) | 2016-03-09 |
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