CN204228597U - A kind of laser gas pick-up unit - Google Patents
A kind of laser gas pick-up unit Download PDFInfo
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- CN204228597U CN204228597U CN201420756242.9U CN201420756242U CN204228597U CN 204228597 U CN204228597 U CN 204228597U CN 201420756242 U CN201420756242 U CN 201420756242U CN 204228597 U CN204228597 U CN 204228597U
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Abstract
The utility model discloses a kind of laser gas pick-up unit.Light-sensitive surface and out of plumb crossing with the termination section of default light path in this device, like this after detection laser sends from transmitting terminal by generating laser, detection laser can project along default light path to the light-sensitive surface of laser pickoff, and in the process of detection laser projection, detection laser meeting approach is filled in the gas to be measured in default light path, this just makes the termination section of the detection laser be incident upon on light-sensitive surface can reflect the correlation parameter of gas to be measured, and now although detection laser can be stopped section retrodirective reflection by light-sensitive surface, but because of the mutual out of plumb of termination section of light-sensitive surface and default light path, so can not direct projection and through reflexing on transmitting terminal from the light of retrodirective reflection light-sensitive surface, thus avoid the interference of retrodirective reflection light to the transmitting terminal of generating laser.
Description
Technical field
The utility model relates to a kind of laser gas pick-up unit.
Background technology
At present, when in methane gas, city, haze gas etc. detects in mine, usual employing laser gas pick-up unit detects, the use principle of this laser gas pick-up unit is: the laser of laser transmitter projects one wavelength range, irradiate tested gas, a part of laser can be actually taken up by gas, and does not have absorbed laser to arrive laser pickoff, by contrasting the situation of launching and receiving, the parameter of tested gas can be drawn.Along with the development of laser gas detection technique, the kind of detected gas gets more and more, and increasing extent is wide, more and more higher to the requirement of laser gas accuracy of measurement.In traditional laser gas pick-up unit, the light-sensitive surface of laser pickoff is orthogonal with the light received, like this under the retrodirective reflection effect of light-sensitive surface, the light be radiated on light-sensitive surface will can be reflected back toward again on the transmitting terminal of generating laser, there is deviation in the light data that generating laser and laser pickoff are detected, also just makes the result of whole gas detect inaccurate.In addition, when measuring, optical path length needed for different gas between generating laser from laser pickoff is different, and length can affect the accuracy of measurement result not, for shorter light path, the structure of generating laser and the direct correlation of receiver can be adopted, but, for slightly long light path, if still adopt correlation structure, sensor construction size local can be made to become large, make troubles to installing and using.
Utility model content
The purpose of this utility model is to provide a kind of laser gas pick-up unit, is intended to solve detection laser in prior art from the light-sensitive surface of laser pickoff to the inaccurate problem of gas detect result that the transmitting terminal retrodirective reflection of generating laser causes.
In order to realize above object, in the utility model, the technical scheme of laser gas pick-up unit is as follows:
Laser gas pick-up unit, comprise support, support is equipped with by the generating laser of transmitting terminal excitation-detection laser and the laser pickoff by light-sensitive surface reception detection laser, be provided with between transmitting terminal and light-sensitive surface for detection laser from transmitting terminal direct projection or through reflexing to the default light path light-sensitive surface, the initial segment presetting light path is drawn from transmitting terminal, stop section terminates in light-sensitive surface, light-sensitive surface and out of plumb crossing with the termination section of default light path.
Be provided with the catoptron for reflecting detection laser between transmitting terminal and light-sensitive surface, default light path is the bending path of bending on the minute surface of reflective mirror.
Towards the opposite towards with transmitting terminal of light-sensitive surface, and catoptron has more than two pieces.
Light-sensitive surface and transmitting terminal towards on to be staggered setting, and catoptron has four pieces, and default light path is S shape bending path.
The incident angle of the incident section of the minute surface of reflective mirror and the bending part of default light path is 45 °.
Support is provided with the holding tank for holding laser generator, laser pickoff and default light path.
The profile of support is discoid.
Light-sensitive surface and out of plumb crossing with the termination section of default light path in the utility model, like this after detection laser sends from transmitting terminal by generating laser, detection laser can project along default light path to the light-sensitive surface of laser pickoff, and in the process of detection laser projection, detection laser meeting approach is filled in the gas to be measured in default light path, this just makes the termination section of the detection laser be incident upon on light-sensitive surface can reflect the correlation parameter of gas to be measured, and now although detection laser can be stopped section retrodirective reflection by light-sensitive surface, but because of the mutual out of plumb of termination section of light-sensitive surface and default light path, so can not direct projection and through reflexing on transmitting terminal from the light of retrodirective reflection light-sensitive surface, thus avoid the interference of retrodirective reflection light to the transmitting terminal of generating laser, solve detection laser in prior art from the light-sensitive surface of laser pickoff to the inaccurate problem of gas detect result that the transmitting terminal retrodirective reflection of generating laser causes.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present utility model.
Embodiment
The embodiment of laser gas pick-up unit in the utility model: as shown in Figure 1, this device is a kind of laser gas detecting sensor, comprise discoid support 9, support 9 offers the reflection tank holding channel-shaped, the generating laser 1 being in right back Angle Position place and the laser pickoff 10 being in left-front corner is equipped with in reflection tank, and the right front Angle Position place of reflection tank be provided with two side rake angle 45 ° trapezoidal before groove section, be provided with the trapezoidal pit section of two side rake angle 45 ° in the left rear corner position of reflection tank.Generating laser 1 is fixed in reflection tank by the transmitter seat 2 of suit on it, and is provided with convex lens 3 before the transmitting terminal of generating laser 1 front end, and convex lens 3 scioptics cover 4 is fixed on the front end of transmitter seat 2; The both sides inclination cell wall of front groove section and pit section is fixed with the first catoptron 5, second catoptron 6, the 3rd catoptron 7 and the 4th catoptron 8, first catoptron 5, second catoptron 6, the 3rd catoptron 7 and the 4th catoptron 8 successively along light path and is 45 ° of inclination eyeglasses; Laser pickoff 10 is fixed in reflection tank by the receiver seat 11 that its periphery is set with, and the light-sensitive surface of laser pickoff 10 rear end is obliquely installed at fore-and-aft direction.The default light path of S shape is preset with in reflection tank, the initial segment of this default light path is drawn from transmitting terminal, and after reflecting bending successively via the first catoptron 5, second catoptron 6, the 3rd catoptron 7 and the 4th catoptron 8, presetting the termination section of light path terminates on light-sensitive surface, light-sensitive surface and out of plumb crossing with the termination section of default light path.
Incident angle between first catoptron 5 and the initial segment of default light path is 45 °, angle between second catoptron 6 and the minute surface of the first catoptron 5 is 90 °, 3rd catoptron 7 and the second catoptron 6 be arranged in parallel, and the angle between the 4th catoptron 8 and the 3rd catoptron 7 is again 90 °.
Generating laser 1 Emission Lasers light beam, light beam planoconvex lens 3 adjusts, after the first catoptron 5 reflects, there are 90 ° of turnovers in light beam, in like manner, after the reflection of the second catoptron 6, the 3rd catoptron 7 and the 4th catoptron 8, light beam is identical with transmit direction through 360 ° of turnovers altogether.Then, light beam enters laser pickoff 10 at a certain angle, and then draws measurement result.In this process, light beam through multiple reflections, thus substantially prolongs optical path length, the light-sensitive surface of laser pickoff 10 and light beam out of plumb, make reflected light can not be overlapping with incident light, also just make light beam reversely not return, and then improve the accuracy of measurement result.
In the above-described embodiments, preset light path through 360 ° of turnovers, with the light-sensitive surface of the transmitting terminal and laser pickoff that make generating laser when towards the opposite and carry out the transmitting and receiving of optical fiber when being staggered and arranging, in other embodiments, transmitting terminal and light-sensitive surface also can be oppositely arranged or towards identical or mutually vertical, like this when transmitting terminal is relative with light-sensitive surface, the default light path between transmitting terminal and light-sensitive surface is straight line path; Transmitting terminal and light-sensitive surface towards identical or mutually vertical time, the catoptron that the default light path between transmitting terminal and light-sensitive surface is arranged by correspondence or other reflecting elements realize the bending of light path.
Claims (7)
1. laser gas pick-up unit, comprise support, support is equipped with by the generating laser of transmitting terminal excitation-detection laser and the laser pickoff by light-sensitive surface reception detection laser, be provided with between transmitting terminal and light-sensitive surface for detection laser from transmitting terminal direct projection or through reflexing to the default light path light-sensitive surface, the initial segment presetting light path is drawn from transmitting terminal, stop section terminates in light-sensitive surface, it is characterized in that, light-sensitive surface and out of plumb crossing with the termination section of default light path.
2. laser gas pick-up unit according to claim 1, is characterized in that, is provided with the catoptron for reflecting detection laser between transmitting terminal and light-sensitive surface, and default light path is the bending path of bending on the minute surface of reflective mirror.
3. laser gas pick-up unit according to claim 2, is characterized in that, towards the opposite towards with transmitting terminal of light-sensitive surface, and catoptron has more than two pieces.
4. laser gas pick-up unit according to claim 3, is characterized in that, light-sensitive surface and transmitting terminal towards on to be staggered setting, and catoptron has four pieces, and default light path is S shape bending path.
5. laser gas pick-up unit according to claim 2, is characterized in that, the incident angle of the incident section of the minute surface of reflective mirror and the bending part of default light path is 45 °.
6. laser gas pick-up unit as claimed in any of claims 1 to 5, is characterized in that, support is provided with the holding tank for holding laser generator, laser pickoff and default light path.
7. laser gas pick-up unit according to claim 6, is characterized in that, the profile of support is discoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420756242.9U CN204228597U (en) | 2014-12-05 | 2014-12-05 | A kind of laser gas pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420756242.9U CN204228597U (en) | 2014-12-05 | 2014-12-05 | A kind of laser gas pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204228597U true CN204228597U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420756242.9U Active CN204228597U (en) | 2014-12-05 | 2014-12-05 | A kind of laser gas pick-up unit |
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| CN (1) | CN204228597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872325A (en) * | 2017-03-24 | 2017-06-20 | 北京绿刻度科技有限公司 | A kind of dust sensor |
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2014
- 2014-12-05 CN CN201420756242.9U patent/CN204228597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872325A (en) * | 2017-03-24 | 2017-06-20 | 北京绿刻度科技有限公司 | A kind of dust sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: Zhengzhou GL Tech Company |