CN2387521Y - Fibre-optical displacement transducer - Google Patents
Fibre-optical displacement transducer Download PDFInfo
- Publication number
- CN2387521Y CN2387521Y CN 99236379 CN99236379U CN2387521Y CN 2387521 Y CN2387521 Y CN 2387521Y CN 99236379 CN99236379 CN 99236379 CN 99236379 U CN99236379 U CN 99236379U CN 2387521 Y CN2387521 Y CN 2387521Y
- Authority
- CN
- China
- Prior art keywords
- fibre
- light
- encoder gear
- optical fiber
- optical
- 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.)
- Expired - Fee Related
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Abstract
The utility model is composed of a fiber optical probe, a coding disc 12, a photoemissive device 17, a light sending fiber optic 6, a photoelectric conversion device 9, light returning fiber optic 8 and a data processing device 10. a coding tooth of the coding disc 12 can move in a coding gear groove 11 of the fiber optical probe, pulse signals can be produced by light through the coding disc 12, and the displacement of an object which causes the coding disc 12 to rotate can be measured by the pulse signals. The utility model has the advantages of high measuring precision, high safety and no electricity on site, being especially suitable for measuring the increase-decrease amount of flammable and explosive liquid in a storage tank.
Description
The utility model relates to technical field of optical fiber sensing.
In industrial circle, usually to make accurate automatic measurement, as the liquid level position of storage tank, the degree that gate of hydropower station is opened etc. to some displacements.How by hand the liquid level of present storage tank farm dipping is finished, and surveyor's labour intensity is big, and this measuring method is not easy to automatic management, and used steel ruler precision is not enough, and measuring error is very big.
Optical fiber technology is constantly developed in recent years, in the industrial technology field, obtained using widely, the optical fiber liquid surface detector is exactly wherein a kind of, probe is installed in appropriate location in the liquid tank, light is delivered to probe and reclaim the light that returns from probe by answer the smooth optic fibre with optical fiber, whether lifting/lowering is to probe positions thereby can determine liquid level, realizes detecting and control.Utilize the light measurement that its unique advantage is arranged: accurately, equipment is simple, measures inflammable and explosive object, anti-electromagnetic interference (EMI) etc. because of electricity is not on-site.
The purpose of this utility model is to utilize optical fiber sensing technology to design a kind of displacement transducer, this sensor is transformed to offset variable the pulse signal of light, measure field has only mechanical part and optical fiber and light, there is not power supply, the measuring accuracy height, good reliability, safety is specially adapted to measure the increase and decrease amount of the flammable and combustible liquids in the basin.
Structural principle of the present utility model is to allow the motion of object drive an encoder gear, utilizes light to determine the amount of spin of encoder gear by the number of times of encoder gear, thereby determines the amount of exercise of object.Design a probe socket, open an encoder gear groove in the centre of probe socket, the both sides of encoder gear groove are placed respectively and are sent light optical fiber and answer the smooth optic fibre on the probe socket, and the coding tooth of encoder gear moves in the encoder gear groove.Send an end of light optical fiber to connect light emitting devices, an end of answer the smooth optic fibre connects photoelectric conversion device, and encoder gear connects a gearing.
The gearing that moves through of object that will be measured during use is delivered to encoder gear;
The light that sends from light emitting devices enters probe socket by sending light optical fiber, and light enters the opposite side of probe socket by the encoder gear groove, is delivered to photoelectric conversion device after being received by answer the smooth optic fibre;
Because the feasible light by the encoder gear groove of the motion of encoder gear has part intercepted by the gear teeth of encoder gear, the signal that makes photoelectric conversion device receive is the discontinuous pulses formula, thereby data processing equipment calculates the amount of spin that the number of times that receives light calculates encoder gear according to the pulse signal of photoelectric conversion device.
The utility model utilizes light to come the displacement of Measuring Object by the pulse signal that code-wheel produces, and the measuring accuracy height is safe and reliable, and electricity is not on-site, is specially adapted to measure the increase and decrease amount of the flammable and combustible liquids in the basin.
With accompanying drawing the utility model is further described below:
Fig. 1 structure principle chart of the present utility model;
Fig. 2 measures the example of the variation of oil tank level with the utility model.
As shown in Figure 1, the utility model is by fibre-optical probe, code-wheel 12, light emitting devices 7 with send light optical fiber 6, photoelectric conversion device 9 and answer the smooth optic fibre 8 and data processing equipment 10 to form.
Wherein the structure of fibre-optical probe is that a probe socket 4 is arranged, open an encoder gear groove 11 in the centre of probe socket 4, the both sides of encoder gear groove 11 difference installing and locating seat 2 in the probe socket 4, in positioning seat 2, place convex lens 5 and optical fiber contact pins 1, penetrate respectively in the optical fiber contact pins 1 on both sides and send light optical fiber 6 and answer the smooth optic fibre 8, optical fiber contact pins 1 usefulness dog screw 3 is fixing.
Encoder gear 12 is installed in the appropriate location, makes the coding tooth of encoder gear 12 to move in encoder gear groove 11, encoder gear 12 connects a gearing 13.
Connect light emitting devices 7 at an end that send light optical fiber 6, the end connection photoelectric conversion device 9 at answer the smooth optic fibre 8 is connected to photoelectric conversion device 9 with data processing equipment 10.
The motion of object that will be measured during use is delivered to gearing 13, and the gearing 13 that moves through of object drives encoder gear 12 rotations;
Send light and by sending light optical fiber 6 to enter fibre-optical probe from light emitting devices 7, light planoconvex lens 5 focuses on the back to be passed through from encoder gear groove 11, the convex lens 5 that are positioned at another side are sent to photoelectric conversion device 9 by answer the smooth optic fibre 8 after light is focused on again, and photoelectric conversion device 9 converts light signal to electric signal and send data processing equipment 10 to do overall treatment.
Because the motion of encoder gear 12, feasible light by encoder gear groove 11 has part intercepted by the gear teeth of encoder gear 12, the signal that makes photoelectric conversion device 9 receive is the discontinuous pulses formula, thereby data processing equipment 10 calculates the amount of spin that the number of times that receives light is converted out encoder gear 12 according to the pulse signal of photoelectric conversion device 9.
Fig. 2 is used to measure the example that oil tank level changes, a balance reel case 17 is installed at oil tank 22 tops, big reel 18 and rap wheel 19 are installed in the balance reel case 17, on the big reel 18 around on the measuring steel wire rope, measuring steel wire rope end is fastened float 20, on the rap wheel 19 around on the weight wire rope, weight wire rope end is fastened weight 21.
At balance reel case 17 other sensor installation casees 16, fibre-optical probe 15, encoder gear 12 and gearing 13 are installed in the Sensor box 16.
Balance reel axle 19 and gearing 13 are linked up.
With sending light optical fiber 6 to connect light emitting devices 7 and fibre-optical probes 15,
Connect fibre-optical probe 15 and photoelectric conversion device 9 with answer the smooth optic fibre 8, data processing equipment 10 is connected with photoelectric conversion device 9.
During work, from light emitting devices 7 light is sent into fibre-optical probe 15 by sending light optical fiber 6, light through fibre-optical probe 15 passes to photoelectric conversion device 9 from answer the smooth optic fibre 8, and photoelectric conversion device 9 converts light signal to electric signal and send data processing equipment 10 to do overall treatment.
The variation of liquid level causes moving up and down of float 20 in the oil tank 22, weight 21 makes balance reel balance, make big reel 18 and balance reel axle 19 rotate simultaneously, and by 12 rotations of gearing 13 drive encoder gears, it is intermittent that the rotation of encoder gear 12 makes by the light of fibre-optical probe 15, what be reflected to data processing equipment 10 is the pulse signal that receives interruption, thereby data processing equipment 10 calculates the amount of spin that the number of times that receives light is converted out encoder gear 12 according to pulse signal.Can accurately calculate the increase and decrease amount of liquid in the oil tank 22 according to the ratio formula.
Claims (4)
1, optical fibre displacement sensor, by fibre-optical probe, code-wheel (12), light emitting devices (7) with send light optical fiber (6), answer the smooth optic fibre (8), photoelectric conversion device (9) and data processing equipment (10) to form, it is characterized in that: the structure of described fibre-optical probe is that a probe socket (4) is arranged, open an encoder gear groove (11) in the centre of probe socket (4), install respectively on the both sides of encoder gear groove (11) and send light optical fiber (6) and answer the smooth optic fibre (8).
2, optical fibre displacement sensor according to claim 1 is characterized in that: have in inciting somebody to action with positioning seat (2) and send the optical fiber contact pins (1) of light optical fiber (6) or answer the smooth optic fibre (8) to be positioned on the probe socket (4).
3, optical fibre displacement sensor according to claim 2 is characterized in that: convex lens (5) are housed in the positioning seat (2).
4, according to claim 1,2,3 described optical fibre displacement sensors, it is characterized in that: the coding tooth of code-wheel (12) moves in encoder gear groove (11), and encoder gear (12) is installed on the gearing (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99236379 CN2387521Y (en) | 1999-06-18 | 1999-06-18 | Fibre-optical displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99236379 CN2387521Y (en) | 1999-06-18 | 1999-06-18 | Fibre-optical displacement transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2387521Y true CN2387521Y (en) | 2000-07-12 |
Family
ID=34024204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99236379 Expired - Fee Related CN2387521Y (en) | 1999-06-18 | 1999-06-18 | Fibre-optical displacement transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2387521Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2757976C1 (en) * | 2020-07-14 | 2021-10-25 | Александр Владимирович Репин | Fibre-optic liquid level indicator |
| CN117053842A (en) * | 2023-07-20 | 2023-11-14 | 齐鲁工业大学(山东省科学院) | Passive numerical display optical fiber top plate displacement sensor |
-
1999
- 1999-06-18 CN CN 99236379 patent/CN2387521Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2757976C1 (en) * | 2020-07-14 | 2021-10-25 | Александр Владимирович Репин | Fibre-optic liquid level indicator |
| CN117053842A (en) * | 2023-07-20 | 2023-11-14 | 齐鲁工业大学(山东省科学院) | Passive numerical display optical fiber top plate displacement sensor |
| CN117053842B (en) * | 2023-07-20 | 2024-01-30 | 齐鲁工业大学(山东省科学院) | Passive numerical display optical fiber top plate displacement sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |