CN2242450Y - Digital type optical fiber pressure sensor - Google Patents
Digital type optical fiber pressure sensor Download PDFInfo
- Publication number
- CN2242450Y CN2242450Y CN 95220968 CN95220968U CN2242450Y CN 2242450 Y CN2242450 Y CN 2242450Y CN 95220968 CN95220968 CN 95220968 CN 95220968 U CN95220968 U CN 95220968U CN 2242450 Y CN2242450 Y CN 2242450Y
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- China
- Prior art keywords
- optical fiber
- rotating shaft
- model
- utility
- pressure
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- 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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- 239000013307 optical fiber Substances 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of structural design that a mechanical type pressure gauge is improved into a digit type optical fiber pressure sensor. The utility model is characterized in that a metal fence sheet is additionally arranged on a rotating shaft of an original pressure gauge, a support frame which is provided with an optical fiber head and a reflective mirror is arranged on the side wall of a gauge case, and a signal processor is connected to the other end of optical fiber. The utility model has the advantages of high precision, good long-term stability, strong anti-interference capability, capability of remote measurement, capability of net access to computers, etc.
Description
The utility model belongs to the pressure measurement technology field, particularly mechanical gauge is transformed into a kind of structural design of digital fibre optic compression sensor.
The prior mechanical pressure gauge is a kind of pointer watch dial direct-reading meter.Its structure is a pointer and helical pressure pipe that is connected by a rotating shaft in a watchcase inside basically, deformation takes place after spiral pipe is under pressure axle is rotated and the rotation of drive pointer, the size that can read pressure by dial scale.Its technical indicator is: pressure measurement range has multiple (from vacuum tightness to low pressure, and to up to a hundred atmospheric high pressure), and measuring error is 2%.
Existing fibre optic compression sensor has two big classes: a class is an optical fiber itself as sensitive element: high birefringence optical fiber pressure transducer of the optical fiber micro-bending pressure transducer of intensity modulated and Polarization Modulation etc. for example, its advantage is highly sensitive, and shortcoming is that long-time stability are relatively poor, the measurement dynamic range is little.Another kind of is that optical fiber is only as the optical signal transmission element, the sensitive element of pressure then has multiple, for example: can utilize the elasto-optical effect of transparent material to constitute the fibre optic compression sensor of Polarization Modulation, utilize fibre optic compression sensor of the intensity modulated that anti-dazzling screen or reflecting optics constitute or the like.This type optical fiber pressure transducer output all is analog quantity, poor anti jamming capability in the optical signal transmission process; And long-time stability are all poor.
The purpose of the utility model is: utilize former helix tube type pressure gauge long-time stability good, advantage of simple structure, repack into and using up coding and read force value, the coded light signal of using this pressure of Optical Fiber Transmission again is to pulpit at a distance, constitute a digital fibre optic compression sensor thus, make that it has the precision height, long-time stability are good, antijamming capability is strong, can take remote measurement, can with plurality of advantages such as computernetworking.
The utility model is designed a kind of digital fibre optic compression sensor, be included in the watchcase and fix a rotating shaft by bearing seat, this rotating shaft one end links to each other with a pressure spiral pipe by a gear train, it is characterized in that fixing a code-disc at the said rotating shaft other end, also be included in and fix a Contraband type support on this case side wall, fix an optical fiber head and a light reflection surface respectively on the upper and lower end face relative position of this support, said code-disc periphery is placed in one, and this optical fiber other end is connected with signal processor.
Principle of work of the present utility model is all basic identical with the mechanical gauge outfit of former pointer-type with use, promptly when the pressure spiral pipe is experienced pressure, it will be out of shape and make rotating shaft to rotate, rotating shaft drives the code-disc rotation, behind the light bit code dish that optical fiber head penetrates, again by reflecting surface reflected back optical fiber, at last by the signal processing unit processes display result.
The utility model also can be fixed a scale dial plate that has a mesopore on said watchcase, said rotating shaft is inserted among this dial plate mesopore, and a pointer places on this dial plate and with rotating shaft and links to each other.Said code-disc is thin metal gate sheet.
The utlity model has following characteristics:
The first, become digital quantity by analog quantity, be convenient to Optical Fiber Transmission, improve the antijamming capability of Optical Fiber Transmission greatly;
The second, can improve measuring accuracy, its pressure error can be reduced to below 0.7%;
The 3rd, can be used for having only the pressure gauge of small torque;
The 4th, do not destroy original pointer pressure structure, therefore can be digital, pointer dual-purpose.
Brief Description Of Drawings:
Fig. 1 is a kind of example structure synoptic diagram of the utility model.
Fig. 2 is the signal processing circuit schematic diagram of the utility model embodiment.
The utility model is designed a kind of digital fibre optic compression sensor embodiment, as shown in Figure 1, 2, is described in detail as follows in conjunction with the accompanying drawings:
Fig. 1 is the present embodiment structural representation, and wherein watchcase 1 is for having carried out local sectility, to show its inner structure.Stainless steel wire rotating shaft 2 is fixed in centre in the watchcase 1 by the bearing seat on the watchcase bottom surface 21, the scale dial plate 3 of a band center pit is fixed in the watchcase upper end, rotating shaft 2 is just in time stretched out from the dial plate mesopore, link to each other with a pointer 4 again, rotating shaft 2 bottoms connect one by pinion wheel 51, the gear train that tooth bar 52 is formed, pressure spiral pipe 6 links to each other with tooth bar 52.Also fix a code-disc 7 as being in the light device in the rotating shaft between dial plate 3 and the pinion wheel 51, code-disc 7 is selected the metal gate sheet of being made by the sheet metal of (about 0.1mm is thick) as thin as a wafer for use, and grid sheet groove number is 100, and diameter is 48mm; One Contraband type support 8 is installed on metal gate sheet height and position on the case side wall, and support two ends opposite position up and down is equipped with optical fiber head 81 and the reflective mirror 82 that has collector lens, and the periphery of metal gate sheet just in time passes therebetween.Its course of work is: when the pressure spiral pipe was experienced the pressure variation, generation deformation drove rotating shaft by gear train and rotates, and rotating shaft drives pointer on the one hand and rotates and can directly read force value by the scale that gives elder generation's demarcation on the dial plate; Simultaneously, rotating shaft drives the rotation of metal gate sheet and constantly cuts the light beam of the fine outgoing of being in the light, and optical fiber will return the light of penetrating back by the grid sheet again and divide two-way to deliver to signal processing unit to handle, show its result.
The signal processing unit of present embodiment is a prior art, comprises photodetector, and amplifier is declared to reaching letter frequency circuit, display.Wherein declare to reaching the letter frequency circuit as shown in Figure 2.The present embodiment circuit part carry out frequency multiplication by the input pulse signal that two-way is differed 90 ° and declare to, and up-down counter is provided increase, subtract count signal, in fibre optic compression sensor, scale is segmented and the effect that row is judged is compressed in ascending, descending thereby play.Empty frame inside is divided into frequency multiplier circuit, and it is made up of the reverser of RC delay circuit and band application schmitt trigger, the held concurrently effect of shaping of reverser, the value of RC determine to delay time how much, it is neglected the pulsewidth of input signal greatly and decides.The empty frame of Fig. 4 outside is divided into direction judgment circuit, mainly is that signal is handled, make and in the process of boosting, have only boost signal UP to work, and in the step-down process, have only step-down signal DOWN to work, thereby up-down counter is provided increase, subtract count signal.
Up signal and the step-down Down signal input decimal system asynchronous up-down counter 74LS192 that will boost can carry out ascending, descending and press counting, and drives charactron LC-5011 by 74LS48 and demonstrate count value.
This device can be easily and computernetworking, realizes the pressure monitor to measured object.
Claims (3)
1, a kind of digital fibre optic compression sensor, be included in the watchcase and fix a rotating shaft by bearing seat, this rotating shaft one end links to each other with a pressure spiral pipe by a gear train, it is characterized in that fixing a code-disc at the said rotating shaft other end, also be included in and fix a Contraband type support on this case side wall, fix an optical fiber head and a light reflection surface respectively on the upper and lower end face relative position of this support, said code-disc periphery is placed in one, and this optical fiber other end is connected with signal processor.
2, pressure transducer as claimed in claim 1 is characterized in that also fixing on the said watchcase scale dial plate that has a mesopore, and said rotating shaft is inserted among this dial plate mesopore, and a pointer places on this dial plate and with rotating shaft and links to each other.
3, pressure transducer as claimed in claim 1 is characterized in that said code-disc is thin metal gate sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95220968 CN2242450Y (en) | 1995-09-08 | 1995-09-08 | Digital type optical fiber pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95220968 CN2242450Y (en) | 1995-09-08 | 1995-09-08 | Digital type optical fiber pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2242450Y true CN2242450Y (en) | 1996-12-11 |
Family
ID=33868723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95220968 Expired - Fee Related CN2242450Y (en) | 1995-09-08 | 1995-09-08 | Digital type optical fiber pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2242450Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279008A (en) * | 2010-06-12 | 2011-12-14 | 飞秒光电科技(西安)有限公司 | Optical fiber sensor based on diameter-gradient barrier |
-
1995
- 1995-09-08 CN CN 95220968 patent/CN2242450Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279008A (en) * | 2010-06-12 | 2011-12-14 | 飞秒光电科技(西安)有限公司 | Optical fiber sensor based on diameter-gradient barrier |
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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 |