CN2113465U - Photoelectric sensor - Google Patents
Photoelectric sensor Download PDFInfo
- Publication number
- CN2113465U CN2113465U CN 91226814 CN91226814U CN2113465U CN 2113465 U CN2113465 U CN 2113465U CN 91226814 CN91226814 CN 91226814 CN 91226814 U CN91226814 U CN 91226814U CN 2113465 U CN2113465 U CN 2113465U
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- CN
- China
- Prior art keywords
- photoelectric cell
- fixed
- shadow shield
- measuring staff
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The utility model provides a sensor adopting a photocell as a sensing element, used for measuring displacement or various physical quantities convertible to the displacement. The utility model is composed of a light emitting diode, a photocell, a light screen, a measuring rod, and an outer shell, wherein, one of the photocell and the light screen is fixed on the measuring rod, following the motion of the measuring rod; the other is fixed on the outer shell. When relative move between the photocell and the light screen is generated by the drive of the measuring rod, the illuminant area of the photocell changes; therefore, an electrical signal is generated and is outputted. The utility model has advantages that the mechanical structure is simple, the demand for machining precision is low, the fabricating cost is low, the linearity is good, and the non-linearity is smaller than 0.3%.
Description
The utility model provides a kind of sensor that adopts photoelectric cell to make sensitive element, can be used for Displacement Measurement or the various physical quantity that can be exchanged into change in displacement.
Prior art is as follows:
(1) GS-331 molded lines survey sensor.Sensitive element is a phototransistor, and aperture plate also moves when measurement axis moves, and makes and produces pulse electrical signal output on the phototransistor.Its precision depends on the manufacturing accuracy of aperture plate, and cost is higher." practical sensor handbook has introduction for the 452nd page to this sensor in the Zhang Fuxue volume.
(2) inductance type transducer.This sensor uses extensively, have very high measuring accuracy, but its manufacturing cost is higher, and associated metering circuit complexity, brings certain difficulty to the user.
The purpose of this utility model is the deficiency that overcomes the sensor, design to have higher measuring accuracy, and physical construction is simple the sensor that cost is low.Accompanying drawing is the structural representation of this electro-optical pickoff.
This electro-optical pickoff is made up of light emitting diode 1, photoelectric cell 3, shadow shield 2, measuring staff 4 and shell 5.Light emitting diode is made light source, and photoelectric cell is made sensitive element, and photoelectric cell can be multi-electrode type, symmetric form, four-quadrant type or central hole type.One of photoelectric cell and shadow shield are fixed on the shell, and another is fixed on the measuring staff, can move with measuring staff.Shadow shield can adopt light transmissive material bonding flake structure or shading flake structure between photoelectric cell and light source.
The structure that accompanying drawing is depicted as that shadow shield is fixed on the measuring staff and moves with measuring staff.The light that light source sends shines on the photoelectric cell by shadow shield, the area that the full wafer photoelectric cell is subjected to illumination all equates in any position, but shadow shield is under measuring staff drives when mobile, variation has taken place in the position that shines the light on the photoelectric cell, make increase of photronic upper and lower two-part illuminating area, a minimizing, this two-part output voltage V
1And V
2Difference be exactly and the proportional electric signal of displacement.
Photronic output signal is the millivolt magnitude voltage signals, only needs a simple straight amplifying circuit when therefore using.
This electro-optical pickoff has following advantage:
(1), moving radially of measuring staff influences minimum to measurement result.Because signal of sensor is only relevant with illuminating area, measuring staff moves radially illuminating area is changed, so this sensor is not high to the radial dimension accuracy requirement of measuring staff, makes the physical construction of sensor simple and manufacturing accuracy is less demanding.
(2), the linearity is good.Because the light intensity that light emitting diode sends within the specific limits is even, when the illuminating area on the photoelectric cell changes, the ratio that is varied to of its output electric signal and illuminating area.After measured, nonlinearity erron is less than 0.37%.
Claims (4)
1, electro-optical pickoff, it is by light source, shadow shield, sensitive element, measuring staff and shell are formed, it is characterized in that: adopt photoelectric cell to make sensitive element, make light source with light emitting diode, one of photoelectric cell and shadow shield are fixed on the shell, another is fixed on the measuring staff, and move with measuring staff, the light that light source sends shines on the photoelectric cell by shadow shield, when shadow shield and photoelectric cell produce under measuring staff drives when relatively moving, variation has taken place in the position that shines the light on the photoelectric cell, make photronic on, increase of two-part illuminating area down, one reduces, and the difference of this two-part output voltage is exactly and the proportional electric signal of displacement.
2,, it is characterized in that shadow shield can adopt light transmissive material bonding shading flake structure or shading flake structure according to the electro-optical pickoff of claim 1.
3,, it is characterized in that shadow shield is fixed on the measuring staff, photoelectric cell is fixed on the shell or shadow shield is fixed on the shell, photoelectric cell is fixed on the measuring staff according to the electro-optical pickoff of claim 1.
4,, it is characterized in that photoelectric cell can be multi-electrode type, symmetric form, four-quadrant type or central hole type according to the electro-optical pickoff of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91226814 CN2113465U (en) | 1991-10-17 | 1991-10-17 | Photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91226814 CN2113465U (en) | 1991-10-17 | 1991-10-17 | Photoelectric sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2113465U true CN2113465U (en) | 1992-08-19 |
Family
ID=4932826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91226814 Pending CN2113465U (en) | 1991-10-17 | 1991-10-17 | Photoelectric sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2113465U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934833A (en) * | 2013-01-21 | 2014-07-23 | 株式会社安川电机 | Robot apparatus |
| CN104019741A (en) * | 2014-05-29 | 2014-09-03 | 暨南大学 | State detection apparatus and detection method for lead of overhead contact line equipment |
| CN106323175A (en) * | 2016-11-10 | 2017-01-11 | 重庆邮电大学 | Relative displacement variation sensor based on illumination intensity |
| CN106726566A (en) * | 2017-01-17 | 2017-05-31 | 哈尔滨鼓润生物技术有限公司 | A kind of medicine dissolving device and handle and sterile dispensing system |
| CN107421450A (en) * | 2017-06-29 | 2017-12-01 | 罗琪 | Optical displacement measurement device and displacement measurement method |
| CN108706459A (en) * | 2018-05-07 | 2018-10-26 | 上海海事大学 | Two-electron atom bridge crane panning angle measuring device based on light intensity sensor and measurement method |
| CN108750959A (en) * | 2018-05-07 | 2018-11-06 | 上海海事大学 | Two-electron atom bridge crane panning angle measuring device and measurement method based on the detection of face shape ccd image |
| CN108906916A (en) * | 2018-08-31 | 2018-11-30 | 东莞市缔网通讯科技有限公司 | A kind of method and apparatus of high frequency silver-jacketed wire drawing line footpath detection |
| CN109142787A (en) * | 2018-07-24 | 2019-01-04 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of nonmetallic flexible whole pendulum |
| CN109541257A (en) * | 2018-11-23 | 2019-03-29 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of pendulous accelerometer |
-
1991
- 1991-10-17 CN CN 91226814 patent/CN2113465U/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934833A (en) * | 2013-01-21 | 2014-07-23 | 株式会社安川电机 | Robot apparatus |
| CN104019741A (en) * | 2014-05-29 | 2014-09-03 | 暨南大学 | State detection apparatus and detection method for lead of overhead contact line equipment |
| CN106323175A (en) * | 2016-11-10 | 2017-01-11 | 重庆邮电大学 | Relative displacement variation sensor based on illumination intensity |
| CN106323175B (en) * | 2016-11-10 | 2019-08-16 | 重庆邮电大学 | Relative displacement based on intensity of illumination changes quantity sensor |
| CN106726566A (en) * | 2017-01-17 | 2017-05-31 | 哈尔滨鼓润生物技术有限公司 | A kind of medicine dissolving device and handle and sterile dispensing system |
| CN107421450A (en) * | 2017-06-29 | 2017-12-01 | 罗琪 | Optical displacement measurement device and displacement measurement method |
| CN108706459A (en) * | 2018-05-07 | 2018-10-26 | 上海海事大学 | Two-electron atom bridge crane panning angle measuring device based on light intensity sensor and measurement method |
| CN108750959A (en) * | 2018-05-07 | 2018-11-06 | 上海海事大学 | Two-electron atom bridge crane panning angle measuring device and measurement method based on the detection of face shape ccd image |
| CN109142787A (en) * | 2018-07-24 | 2019-01-04 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of nonmetallic flexible whole pendulum |
| CN108906916A (en) * | 2018-08-31 | 2018-11-30 | 东莞市缔网通讯科技有限公司 | A kind of method and apparatus of high frequency silver-jacketed wire drawing line footpath detection |
| CN109541257A (en) * | 2018-11-23 | 2019-03-29 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of pendulous accelerometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |