CN2116191U - Optical fibre coupling hot metal detector - Google Patents
Optical fibre coupling hot metal detector Download PDFInfo
- Publication number
- CN2116191U CN2116191U CN 92210406 CN92210406U CN2116191U CN 2116191 U CN2116191 U CN 2116191U CN 92210406 CN92210406 CN 92210406 CN 92210406 U CN92210406 U CN 92210406U CN 2116191 U CN2116191 U CN 2116191U
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- metal detector
- optical
- hot metal
- light
- lens
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model provides an optical-fiber coupling hot-metal detector, comprising a detection part 3 for optical fibers, an optical sensor 5 and an optical-electrical converter 6. The optical fibers couple infrared light radiated from the hot metal to the window of the optical sensor, so that a probe is separated from an optical-electrical converting part, so as to overcome the disadvantages of a lens coupling hot-metal detector lens and heat-sensitive elements, such as difficult protection, large volume, difficult mounting in the field, low position measuring precision, easy shielding and interference by outside light sources and moving objects, etc. The optical-fiber coupling hot-metal detector can be manufactured into different types according to the infrared intensity of objects.
Description
The utility model belongs to the thermometal position detecting device, particularly adopts the thermometal pick-up unit of light transmitting fiber manifold type.
Hot metal detector is an indispensable pick-up unit in the rolling process control system, is used to follow the tracks of the motion process of rolled piece.Existing hot metal detector all adopts the optical lens coupling scheme, promptly, the infrared radiating light that thermometal sent focused on the light activated element window by optical lens, and after opto-electronic conversion, amplification shaping, output relay contact point signal and level signal.The critical component of this thermometal pick-up unit is an optical lens, and its weakness is also just on this critical component: 1) according to detecting requirement, its optical lens and light activated element must strictly be made one according to the focal length relation of lens; 2) have enough luminous energy to enter the light activated element window for guaranteeing, the diameter of lens of lens also must be enough big, will reach usually about 50mm, and therefore difficulty is installed at the scene, and the cooling of camera lens and proofing dust and protecting are also very difficult; 3) probe that constitutes by optical lens and light activated element and the photoelectric switching circuit observed target of must directing pointing, the detecting device bulk volume is bigger in addition, therefore is difficult near hidden being installed in the measured target, thereby is often broken by the mobile thing in scene, or be blocked, directly influence detects; 4) be subject to the interference of external light source and the interference of mechanical vibration.
The purpose of this utility model provides a kind of optical fiber that adopts and is coupled the hot metal detector that probe separates with photoelectric conversion section.
Another purpose of the present utility model provide a kind of energy high temperature resistant, outside dimension is little, can bend around, be easy to the hot metal detector probe of proofing dust and protecting.
Another purpose of the present utility model provides the hot metal detector that a kind of size is little, in light weight, the scene is easy for installation, reliability is high.
According to hot metal detector of the present utility model, forms by biography light beam light transmitting fiber detection part and the photoelectric conversion part branch of surveying infrared radiation, with bendable around biography light beam light transmitting fiber infrared radiation is popped one's head in and photoelectric conversion section is coupled together.Pop one's head in measured thermometal infrared radiation signal by this flexible biography on the window of light activated element that light beam light transmitting fiber is coupled to photoelectric conversion section, convert level signal then to and be transported in the rolling process control system.
According to the utility model, probe can be installed near the tested thermometal, photoelectric conversion device then can be installed in the place of safety away from tested thermometal, so photoelectric conversion section thermal radiation not, and safe operation is guaranteed in the mechanical collision infringement.
According to the utility model, probe can be coupled to form by GRIN Lens and biography light beam optic fiber end face.This probe is high temperature resistant, outside dimension is little, bendable around, be easy to proofing dust and protecting.
According to cold/hot metal detector light transmitting fiber of the present utility model two kinds of coupled modes are arranged:
1. light transmitting fiber and lens mating type are applicable to tested thermometal temperature lower (400～800 ℃), the situation that infrared radiation is more weak.This hot metal detector adopts and passes the self-focusing coupled lens that light velocity light transmitting fiber is complementary, place fibre-optic front end, increase the light gathering of probe, end adds on the window that coupled lens is coupled in light activated element, to increase fibre-optic biography luminous energy power.
2. direct coupled type is applicable to tested thermometal higher (700～1300 ℃), and the situation of strong infrared radiation is arranged.Pass light beam light transmitting fiber front end and do not add condenser, end does not add coupled lens, and the employing diameter is that the biography light beam light transmitting fiber of 3～5mm directly is coupled.
According to the utility model, can be divided into several bundles with passing light beam light transmitting fiber front end probe portion, end gathers together and is coupled on the light activated element window, so just can realize on the light path " or " processing, make multichannel optical fiber manifold type hot metal detector.
According to the utility model, the selected biography light beam light transmitting fiber transmitance and the spectral response of light activated element and detected target optical spectrum emissivity are complementary.
Adopt hot metal detector of the present utility model, because light transmitting fiber is high temperature resistant, diameter is little, aperture angle big (67 °), bendable around, its end of probe can be near tested metal, and photoelectric conversion part separates on-the-spot far away, makes it easy hidden installation, safe and reliable, the positional precision height, the disturbing effect of dust, steam is little, and antijamming capability is strong.
Below in conjunction with accompanying drawing the utility model is elaborated.
Fig. 1 is the direct manifold type hot metal detector of a biography light beam light transmitting fiber of the present utility model schematic diagram.
Fig. 2 is light transmitting fiber of the present utility model and coupled lens convolution hot metal detector.
Fig. 3 is the direct manifold type hot metal detector of binary channels.
As shown in Figure 1, hot metal detector of the present utility model is made up of the biography light beam light transmitting fiber detection part 3 and light activated element 5, the photoelectric commutator 6 that are coupling on the light activated element window, passing light beam photoconduction fibre diameter is 3-5mm, and its length depends on the requirement at the scene of detection.Its front end is that end of probe is promptly popped one's head in, and end is coupling on the window of light activated element 5.When its front end has thermometal to occur, promptly detect the infrared signal that gives off by thermometal, optical fiber is transferred to light activated element 5 with this signal and converts electric signal to by photoelectric commutator 6 and be transported to the rolling process control system.
Fig. 2 is an another embodiment of the present utility model, optical fiber detecting spare wherein by the GRIN Lens 2 that is contained in the optical fiber front end, pass light beam light transmitting fiber 7, the coupled lens 4 that is contained in optical fiber connector formed.This detecting device is applicable to the lower situation of thermometal temperature (400～800 ℃).
Fig. 3 is another embodiment of this real utility model, and the front end probe portion of optical fibre detector 3 wherein is divided into many (two bundles shown in the figure), and end gathers together and is coupled on the light activated element window.This mode be used to realize on the light path " or " handle.
Hot metal detector of the present utility model is used for the rolling process control system of certain steel rolling mill, detects the position of steel billet and finished steel, obtains satisfied effect.9 optical fiber manifold type hot metal detectors have been installed, the finished product wire rod of detected metal end size from the billet of 25 * 25mm to φ 18 on steel rolling production-line.Without any need for cooling, dust prevention, sensors work is reliable and stable.
Claims (3)
1, a kind of hot metal detector that light activated element 5 and photoelectric commutator 6 are arranged, it is characterized in that its probe portion is made up of the biography light beam light transmitting fiber detection part 3 that is coupling on light activated element 5 windows, it passes the fibre-optic diameter of light beam is 3～5mm, and length depends on the distance at the scene of detection.
2, hot metal detector according to claim 1 is characterized in that said optical fiber detecting device 3 by the GRIN Lens 2 that is contained in the optical fiber front end, passes light beam light transmitting fiber 7 and be contained in its terminal coupled lens 4 to form.
3, hot metal detector according to claim 1 is characterized in that the front end probe portion of said biography light beam light transmitting fiber detection part 3 is divided into multi beam, and end gathers together and is coupled on the window of light activated element 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92210406 CN2116191U (en) | 1992-03-11 | 1992-03-11 | Optical fibre coupling hot metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92210406 CN2116191U (en) | 1992-03-11 | 1992-03-11 | Optical fibre coupling hot metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2116191U true CN2116191U (en) | 1992-09-16 |
Family
ID=4955529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92210406 Granted CN2116191U (en) | 1992-03-11 | 1992-03-11 | Optical fibre coupling hot metal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2116191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297724A (en) * | 2011-09-30 | 2011-12-28 | 新兴铸管股份有限公司 | Light converging device for hot metal detector |
-
1992
- 1992-03-11 CN CN 92210406 patent/CN2116191U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297724A (en) * | 2011-09-30 | 2011-12-28 | 新兴铸管股份有限公司 | Light converging device for hot metal detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |