CN1158413A - Paper thickness dynamic measuring tech. - Google Patents
Paper thickness dynamic measuring tech. Download PDFInfo
- Publication number
- CN1158413A CN1158413A CN 96118912 CN96118912A CN1158413A CN 1158413 A CN1158413 A CN 1158413A CN 96118912 CN96118912 CN 96118912 CN 96118912 A CN96118912 A CN 96118912A CN 1158413 A CN1158413 A CN 1158413A
- Authority
- CN
- China
- Prior art keywords
- paper
- fibre
- light
- grin lens
- thickness
- 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.)
- Granted
Links
Abstract
A dynamic measuring technique of paper thickness, suitable for making thin paper, is based on optical fibre sensing principle. After photoelectric conversion and analag comparison, the data is processed by single-chip computer. An optical fibre plate corresponding to metal lattice of paper to be measured is used as emitting part of light from light soruce and the light receiver can sense the change in paper thickness. With it, the sprayed paper pulp amount can also be controlled. Its advantages are simple structure, high precision (+/-1 micron) and easy application.
Description
The invention belongs in the paper industry the dynamic measuring tech of slim paper sheet thickness, relate to photoelectric sense technology and microcomputer signal processing technology.
For the kinetic measurement of paper, before the present invention, three kinds of measuring techniques commonly used in the medium-sized or above paper mill, one is beta-gauging technique, and this method is because β ray penetration power is strong, and is low to the measurement sensitivity of thin paper, and cost height, poor stability, existing being used in the measurement of ground paper more; Two is laser scanner technique, though it can be finished the thin paper Determination of thickness, its test system structure complexity requires very highly to guide precision in the system, and corresponding its cost is very high; The third is to adopt the infrared transmittivity method, owing to be subjected to the influence of paper humidity, the error of its measurement result is bigger, can't use.
The objective of the invention is to, propose a kind of Fibre Optical Sensor paper thickness dynamic measuring tech, overcome the defective in the above-mentioned technology, improve measuring accuracy, reduce cost of manufacture.
The present invention is to be theoretical foundation with following content.Be that paper pulp is ejected on the wire netting of certain order number in the manufacture process of thin paper, thereby the paper pulp fiber more than must accumulating relatively in the point of crossing of wire netting, paper oven dry back is facing to white light, it also is latticed can observing paper, so its transmittancy is just variant, the transmittancy of point of crossing is poor, and the transmittancy in the grid is higher.In the manufacture process of thin paper, if the glass plate grid that has light source identical with metal mesh number is set under the paper that is moving, corresponding position on paper is provided with receiver, then when paper moves, light penetration was the highest when static glass plate grid was aimed at mutually with dynamic paper grid hole, and transmittance reduces during two grid mutual dislocation.Therefore for light, glass plate grid plays the effect of chopper, and paper is modulated by chopper in manufacture process and obtained an AC signal, thereby measures paper thickness.
Realize that technical scheme of the present invention is as follows, below tested paper, be provided with and form the consistent fibre faceplate of this paper metal grill order number, device is connected with the fibre-optic bundle of light source below fibre faceplate, above tested paper, the GRIN Lens that is connected with optical fiber cable is set with the fibre faceplate corresponding section, optical fiber cable is provided with Y type optical branching device, and light is divided into two-way; One the tunnel after filtration mating plate become λ
1, λ
1Behind photoelectric commutator again through amplifier, with electric signal I
1Transport to totalizer and subtracter respectively, the output terminal of subtracter feeds divider, and another road becomes λ after the mating plate after filtration
2, λ
2Behind photoelectric commutator again through amplifier, with electric signal I
2Transport to subtracter and totalizer respectively, the output terminal of totalizer feeds divider through compensating circuit; The two path signal that enters divider is sent in the singlechip CPU through the A/D digital-to-analog conversion more after treatment and is handled, and display paper is thick simultaneously, but and the injection of FEEDBACK CONTROL paper pulp put.
Feature of the present invention also is, the Width of tested paper is provided with guide rail, fibre faceplate and GRIN Lens are installed respectively, the two moves simultaneously can measure view picture paper wide multiple spot thickness and average thickness, or a plurality of fibre faceplates and GRIN Lens are set on the paper cross direction, the output that can circulate is respectively measured and control signal.Described in the present invention fibre faceplate can also adopt glass plate grid.
As can be seen, that the present invention has is simple in structure, cost of manufacture is low, measuring accuracy is high, install and use all advantage very easily from such scheme, and its measuring accuracy can reach ± and 1 micron.When the moist degree of paper changes, will cause the change of light intensity transmitance, owing to adopt divider to make paper thick irrelevant, owing to adopt two the tunnel relatively, make the vibration of light source fluctuation and plant equipment not influence measurement result again with absorption coefficient.Because the present invention adopts computer control and Fibre Optical Sensor, can show that not only measured paper is thick, go back may command paper pulp emitted dose, quick because of the response of Fibre Optical Sensor, the control accuracy of paper improves greatly relatively; Also can be provided with functions such as warning, parking in addition according to producing needs.
Accompanying drawing 1 is the structure principle chart of the designed paper thickness dynamic measuring tech of the present invention.1 is mobile paper among the figure, and 2 is roller, and 3 is light source, 4 is fibre-optic bundle, and 5 is fibre faceplate, and 6 is GRIN Lens, 7 is optical fiber cable, and 8 is Y type optical branching device, and 9 is optical filter, 10 is photoelectric commutator, 11 is amplifier, and 12 is adder subtractor, and 13 is compensating circuit, 14 is divider, and 15 is the CPU single-chip microcomputer.
Describe technology implementation scheme of the present invention in detail below in conjunction with accompanying drawing.
Referring to accompanying drawing, under the effect of roller, paper moves continuously.The fibre faceplate consistent with paper metal grill order number is arranged on tested mobile paper sheet underneath, below fibre faceplate, be provided with fibre-optic bundle and be communicated with light source, light source can be selected infrared light supply or visible light source, source light through the fibre-optic bundle elimination shake light, become the light directive tested paper consistent through fibre faceplate with metal mesh number; The GRIN Lens that light is set at corresponding position, paper top after by paper receives, and enters Y type shunt light by optical fiber cable and divides two-way, and mating plate becomes λ after filtration respectively
1And λ
2, λ wherein
1Less than 1 μ m, λ
2Greater than 1 μ m; λ
1And λ
2Through photoelectric commutator electric signal is fed prime amplifier I respectively
1And I
2, the electric signal I after the amplification
1Transport to subtracter (I respectively by two-way
1-I
2) and totalizer (I
1+ I
2), the electric signal I after the amplification
2Transport to totalizer (I respectively by two-way
1+ I
2) and subtracter (I
1-I
2), two path signal is through handling I in subtracter
1-I
2Electric signal is transported to divider, and two path signal is through handling I in totalizer
1+ I
2Electric signal feeds divider through compensating circuit, to I
1+ I
2It is simulation curve and the zero point that obtains from divider in order to adjust that electric signal compensates, and makes imitated output quantity conform to the debugging requirement; Enter the two path signal process (I in the divider
1-I
2)/(I
1+ I
2) after the processing with analog quantity output, handle by the program of establishment through entering single-chip microcomputer after the digital-to-analog conversion, show paper sheet thickness.And signal feedback can be used for controlling the link of production.
Fibre faceplate described in the technical solution of the present invention, glass plate grid, fibre-optic bundle, GRIN Lens, optical fiber cable and Y type optical branching device and optical filter etc. are prior art in the optical material industry, and can buy on the market, wherein the numerical aperture NA of GRIN Lens used herein is 0.6; Described photoelectric commutator, circuit amplifier, totalizer, subtracter, compensating circuit, divider and digital to analog converter and single-chip microcomputer etc. also belong to prior art in the electronic material industry, each parts all has sale in market, divider wherein used herein is with the logarithm simulation process, i.e. Ln (I
1-I
2/ I
1+ I
2)=Ln (I
1-I
2)-Ln (I
1+ I
2); And simulation and processing to electric signal are that the professional and technical personnel can both finish, here no longer narration.
Claims (5)
1. paper thickness dynamic measuring tech, adopted the method for Fibre Optical Sensor, including parts such as light source, light reception, optical filtering and opto-electronic conversion, is that light signal is converted to electric signal after amplifying, and sends into single-chip microcomputer again by simulation relatively after digital-to-analog conversion and handles; It is characterized in that, below tested paper, be provided with and form the consistent fibre faceplate of this paper metal grill order number, device is connected with the fibre-optic bundle of light source below fibre faceplate, with the fibre faceplate corresponding position GRIN Lens that is connected with optical fiber cable is set above tested paper, optical fiber cable is provided with Y type optical branching device light is divided into two the tunnel; One the tunnel after filtration mating plate become λ
1, λ
1After opto-electronic conversion again through amplifier, with electric signal I
1Transport to totalizer and subtracter respectively, the output terminal of subtracter feeds divider, and another road mating plate after filtration becomes λ
2, λ
2Behind photoelectric commutator again through amplifier, with electric signal I
2Transport to subtracter and totalizer respectively, the output terminal of totalizer feeds divider through compensating circuit; The two path signal that enters divider with analog quantity output, is sent in the single-chip microcomputer after digital-to-analog conversion and handled after treatment, and is can display paper thick.
2. measuring technique according to claim 1 is characterized in that the Width of tested paper is provided with guide rail, and fibre faceplate and GRIN Lens are installed respectively, and the two moves simultaneously can measure view picture paper wide multiple spot thickness and average thickness.
3. measuring technique according to claim 1 is characterized in that, a plurality of fibre faceplates and GRIN Lens are set on the Width of tested paper, finishes the thickness measure of multiple spot.
4. according to claim 2 or 3 described measuring techniques, it is characterized in that the numerical aperture of described GRIN Lens is 0.6; Described two-way light λ
1Less than 1 μ m, λ
2Greater than 1 μ m.
5. according to the described measuring technique of claim 1 to 4, it is characterized in that described fibre faceplate can adopt the grid order to count the glass plate grid of unanimity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118912 CN1065336C (en) | 1996-12-09 | 1996-12-09 | Paper thickness dynamic measuring tech. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118912 CN1065336C (en) | 1996-12-09 | 1996-12-09 | Paper thickness dynamic measuring tech. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1158413A true CN1158413A (en) | 1997-09-03 |
| CN1065336C CN1065336C (en) | 2001-05-02 |
Family
ID=5125412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96118912 Expired - Fee Related CN1065336C (en) | 1996-12-09 | 1996-12-09 | Paper thickness dynamic measuring tech. |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065336C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423037C (en) * | 2004-12-03 | 2008-10-01 | 发那科株式会社 | Data transfer apparatus for industrial machinery |
| CN101792074B (en) * | 2010-01-29 | 2013-07-24 | 东旭集团有限公司 | Method and detecting system for detecting number of paper on liquid crystal flat glass production line |
| CN103267487A (en) * | 2013-05-23 | 2013-08-28 | 无锡新开河储罐有限公司 | Detection control method and device of inner-coating thickness of rotational molding storage tank |
| CN101874136B (en) * | 2007-11-27 | 2014-04-23 | Abb有限公司 | Sheet stabilizers with suction nozzle having center protrusion |
| CN101566457B (en) * | 2008-04-25 | 2015-04-01 | 米勒·马蒂尼控股公司 | Measurement device applied to measure the thickness of printed matter |
| CN105091761A (en) * | 2014-04-28 | 2015-11-25 | 深圳迈瑞生物医疗电子股份有限公司 | Sample form monitoring device and method |
| CN110332889A (en) * | 2019-07-19 | 2019-10-15 | 上海磊跃自动化设备有限公司 | A kind of measuring device measuring tiny strip concave section |
| CN115524259A (en) * | 2022-11-03 | 2022-12-27 | 蓝冰河(常州)精密测量技术有限责任公司 | Beta-ray electrolytic copper foil surface density quality detection device based on Kr-85 realization |
-
1996
- 1996-12-09 CN CN 96118912 patent/CN1065336C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423037C (en) * | 2004-12-03 | 2008-10-01 | 发那科株式会社 | Data transfer apparatus for industrial machinery |
| CN101874136B (en) * | 2007-11-27 | 2014-04-23 | Abb有限公司 | Sheet stabilizers with suction nozzle having center protrusion |
| CN101566457B (en) * | 2008-04-25 | 2015-04-01 | 米勒·马蒂尼控股公司 | Measurement device applied to measure the thickness of printed matter |
| CN101792074B (en) * | 2010-01-29 | 2013-07-24 | 东旭集团有限公司 | Method and detecting system for detecting number of paper on liquid crystal flat glass production line |
| CN103267487A (en) * | 2013-05-23 | 2013-08-28 | 无锡新开河储罐有限公司 | Detection control method and device of inner-coating thickness of rotational molding storage tank |
| CN103267487B (en) * | 2013-05-23 | 2015-08-05 | 无锡新开河储罐有限公司 | Rotational molding storage tank internal coated layer detection control method for thickness and device |
| CN105091761A (en) * | 2014-04-28 | 2015-11-25 | 深圳迈瑞生物医疗电子股份有限公司 | Sample form monitoring device and method |
| CN110332889A (en) * | 2019-07-19 | 2019-10-15 | 上海磊跃自动化设备有限公司 | A kind of measuring device measuring tiny strip concave section |
| CN115524259A (en) * | 2022-11-03 | 2022-12-27 | 蓝冰河(常州)精密测量技术有限责任公司 | Beta-ray electrolytic copper foil surface density quality detection device based on Kr-85 realization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065336C (en) | 2001-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1065336C (en) | Paper thickness dynamic measuring tech. | |
| EP0354996B1 (en) | Fibre-optical device to measure absolute positions | |
| CN201449376U (en) | Device by utilizing microwave to detect moisture content of textile on line | |
| CN205139006U (en) | Dew point measurement device based on laser spectrum absorbs detection | |
| CN87107260A (en) | The device for monitoring characteristics of film on substrate | |
| CN106802284A (en) | A kind of Fiber optic near infrared spectroscopy detecting system | |
| CN106352959A (en) | Long-distance concentrated automatic metering system and method adopting belt weighers in large region | |
| CN101504314A (en) | Atmosphere ultraviolet radiation flux measuring apparatus and method | |
| CN108170100A (en) | A kind of customization plate fitment intelligence manufacture platform | |
| CN116300765A (en) | Intelligent monitoring method and system for wave-absorbing plate production and processing process | |
| CN1975342A (en) | Optical fiber grating sensing system | |
| CN100491988C (en) | Method and its device for detecting tobacco package | |
| EP1997944A1 (en) | Method of making mineral wool | |
| CN106644861A (en) | Particulate matter concentration measuring instrument | |
| CN103292980A (en) | Measuring device for straightness and surface response uniformity of photodetector | |
| US5249143A (en) | Coupling radiant energy/electric current transducers to processors | |
| CN112666732B (en) | Optical detection device of backlight module | |
| CN205719929U (en) | A kind of relative humidity measurement device | |
| US4090793A (en) | Photometric method and apparatus for measuring packing fraction of terminated fiber optic cables | |
| CN213455350U (en) | Automatic measuring system for diameter of optical fiber mode field | |
| CN107202679A (en) | A kind of photoelectric integral type test system and photoelectric test method | |
| CN209043573U (en) | A kind of detection recording device of optical connector element | |
| DE2818789A1 (en) | Thickness measurement of cylindrical objects, wire etc. - by determining attenuation of parallel light beam passing through measurement vol. via rectangular aperture and lens | |
| CN202393705U (en) | Optical fiber sensing device for detecting material components | |
| EP0326761B1 (en) | Endface assessment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FEMTO TECHNOLOGY (XI AN) CO., LTD. Free format text: FORMER OWNER: XIAN INST. OF OPTICS AND PRECISION MECHANICS, CHINESE ACADEMY OF SCIENCES Effective date: 20030523 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20030523 Address after: 710075 Xi'an hi tech Development Zone, Changan science and Technology Industrial Park, B-29 Patentee after: Feteco Technology (Xi'an) Co., Ltd. Address before: 710068 No. 234 Youyi West Road, Shaanxi, Xi'an Patentee before: Xi-an Inst. of Optics and Fine Mechanics, Chinese Academy of Sciences |
|
| 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 |