CN210923467U - Light source adjusting device for handheld laser methane telemeter - Google Patents
Light source adjusting device for handheld laser methane telemeter Download PDFInfo
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- CN210923467U CN210923467U CN201921641375.0U CN201921641375U CN210923467U CN 210923467 U CN210923467 U CN 210923467U CN 201921641375 U CN201921641375 U CN 201921641375U CN 210923467 U CN210923467 U CN 210923467U
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Abstract
The utility model discloses a light source adjusting device for a hand-held laser methane telemeter, which comprises a laser signal receiving shell, wherein the rear lower end of the laser signal receiving shell is connected with a first light source positioning shell, a second light source positioning shell is arranged in the first light source positioning shell, a first lens component is arranged in the front part of the second light source positioning shell, a first positioning shell hole is arranged on the rear end surface of the second light source positioning shell, a first positioning ring is arranged outside the first positioning shell hole, and a laser emitter is arranged in the first positioning ring; the rear end face of the first light source positioning shell is provided with four first positioning threaded holes; a first jacking screw is spirally connected in each first positioning threaded hole and is connected with the second light source positioning shell; all there is first ladder groove at the middle part of first light source location shell, and first retaining ring joint is in the front portion in first ladder groove, and laser emitter's rear portion joint is in the rear portion in first ladder groove. The light source adjusting device is simple in structure and convenient to adjust light in the later period.
Description
Technical Field
The utility model relates to a laser check out test set field, concretely relates to a light source adjusting device for hand-held type laser methane telemeter.
Background
The laser methane telemeter adopts tunable diode laser absorption spectrum Technology (TDLAS), and can detect methane gas in a certain distance. The laser methane telemeter does not need to place a probe in a gas environment, but emits laser beams by equipment, the laser beams pass through a space above a pipeline or a facility, are emitted to an object at the other end, are reflected back to a receiver by the object and are converted into electric signals, and the signals are used for analyzing the concentration of methane. The laser methane telemeter can achieve extremely high detection precision, and light with the wavelength is only absorbed by methane, so that the laser methane telemeter only reacts on methane and is not influenced by other gases, and the detection accuracy is greatly improved. By using the laser methane telemeter, an operator does not need to put in a dangerous environment, the safety of detection personnel is protected, the overhead pipeline can be remotely inspected, and the detection efficiency is improved. Therefore, the laser methane telemeter is widely used in the natural gas leakage detection industry at present.
In a laser methane telemeter, an optical system for transmitting laser and receiving laser needs to form a coaxial line, and due to the processing error of an optical lens and the processing and assembling error of an optical machine structure, the collimated laser cannot be coaxial with a Cassegrain optical system for receiving the laser, and a structure is needed to adjust the transmitted laser to the view field of the receiving system. An optical system for receiving laser light is assembled and then focused to a point, and due to machining and assembly errors of parts, the focus is not located at a fixed position in the optical axis direction, and a photodiode for photoelectric conversion needs to be moved back and forth in the optical axis direction, so that the photodiode can be adjusted to the focused focus. The traditional adjusting structure is large in size and is not suitable for being used in a handheld laser methane telemeter. Therefore, the scheme is used for solving the problems of space position adjustment of the emitted laser and focus adjustment of the receiving optical system. In addition, the conventional optical machine adjusting scheme is that the emitted laser is fixed, and the coaxiality of the emitted laser and the receiving optical system is met by adjusting the three-dimensional space position of the photodiode, and generally, the three-dimensional adjustable structure is complex and is not beneficial to being designed into portable equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a light source adjusting device for hand-held type laser methane telemeter, this light source adjusting device simple structure, processing simple to operate, the fault-tolerant rate is high, and the later stage is adjusted luminance conveniently.
The utility model discloses a realize above-mentioned purpose, the technical solution who adopts is:
a light source adjusting device for a handheld laser methane telemeter comprises a laser signal receiving shell, wherein the lower end of the rear part of the laser signal receiving shell is connected with a first light source positioning shell, a second light source positioning shell is arranged in the first light source positioning shell, a first lens assembly is arranged in the front part of the second light source positioning shell, a first positioning shell hole is formed in the rear end face of the second light source positioning shell, a first positioning ring is arranged on the second light source positioning shell outside the first positioning shell hole, and a laser emitter is arranged in the first positioning ring;
the rear end surface of the first light source positioning shell is provided with four first positioning threaded holes which are respectively arranged on four end corners of the first light source positioning shell; a first jacking screw rod is spirally connected in each first positioning threaded hole, and the end head part of each first jacking screw rod is connected with the second light source positioning shell; all have first ladder groove seted up on the first light source location shell between four first location screw holes, first retaining ring adaptation joint is in the front portion in first ladder groove, and laser emitter's rear portion joint is in the rear portion in first ladder groove.
Preferably, the laser signal receiving shell is in a circular shell shape, and a laser receiving lens and a photodiode assembly for receiving a laser waveband are arranged in the laser signal receiving shell.
Preferably, the first light source positioning shell is in a rectangular shell shape, the upper end surface of the first light source positioning shell is an arc-shaped concave surface, a first positioning shell mounting groove is formed in the first light source positioning shell, and the first positioning shell mounting groove is communicated with the first step groove;
the second light source positioning shell is connected in the first positioning shell mounting groove and the first step groove in a matching manner; the upper end face of the first light source positioning shell is matched and fixedly connected with the upper end face of the laser signal receiving shell.
Preferably, the second light source positioning shell is in a rectangular shell shape, a second positioning shell mounting groove is formed in the second light source positioning shell, and the second positioning shell mounting groove is communicated with the first positioning shell hole; the second positioning shell mounting groove is in a stepped groove shape, and the first lens assembly is connected in the front part of the second positioning shell mounting groove.
Preferably, the first lens assembly comprises a collimating lens, a first lens protection shell is sleeved outside the collimating lens, and the first lens protection shell is in interference fit with the second positioning shell installation groove.
Preferably, four first screw rod positioning blind holes are formed in the rear end face of the second light source positioning shell, and the four first screw rod positioning blind holes are respectively formed in four end corners of the rear portion of the second light source positioning shell.
Preferably, the first screw positioning blind hole is a round hole with a smooth inner wall, and the radius value of the first screw positioning blind hole is larger than that of the rod body of the first jacking screw.
The utility model has the advantages that:
the light source adjusting device for the handheld laser methane telemeter is provided with the novel first light source positioning shell and the novel second light source positioning shell which are used for positioning and connecting the collimating lens and the laser emitter. Still be provided with four first jack-up screw rods that are used for adjusting second light source location shell inclination among this adjusting device, after a first jack-up screw rod precession in four first jack-up screw rods, the position of the second light source location shell at corresponding position can take place the slope, and the slope back takes place for second light source location shell, can adjust collimating lens's inclination to can make collimating lens and laser emitter adjust on same central axis. This allows the first lens assembly to be adjustable over a range of space that is much larger than the misalignment caused by processing and assembly errors of the optical system.
Be provided with first locating ring on the second light source location shell in the first locating shell hole outside in this application, first locating ring can carry out better installation location. The outer cooperation of the tip of first locating ring is personally submitted the notch form, and first locating ring and first step groove cooperation back, two cooperation faces can furthest's reduction frictional resistance, can guarantee moreover that under the fixed condition of laser signal receiving shell, second light source location shell can rotate round the centre of sphere. The whole light source adjusting device is simple in structure, convenient to machine and install, high in fault tolerance rate, convenient to adjust light in the later period and high in practicability.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a light source adjusting device for a hand-held laser methane telemeter.
Fig. 2 is a schematic view of a connection structure of the laser signal receiving housing and the first light source positioning housing.
Fig. 3 is a schematic view of the overall structure of the first light source positioning shell.
Fig. 4 is a schematic view of a connection structure of the second light source positioning shell and the first jacking screw rod.
Fig. 5 is a schematic view of a connection structure of the second light source positioning shell and the first lens protection shell.
Fig. 6 is a schematic view of a connection structure of the second light source positioning shell and the first positioning ring.
Fig. 7 is a schematic view of the overall structure of the second light source positioning shell.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
with reference to fig. 1 to 7, a light source adjusting device for a handheld laser methane telemeter comprises a laser signal receiving shell 1, wherein a first light source positioning shell 2 is connected to the lower end of the rear part of the laser signal receiving shell 1, a second light source positioning shell 3 is arranged in the first light source positioning shell 2, and a first lens assembly 4 is arranged in the front part of the second light source positioning shell 3.
A first positioning shell hole 31 is formed in the rear end face of the second light source positioning shell 3, a first positioning ring 32 is arranged on the second light source positioning shell 3 outside the first positioning shell hole 31, and a laser emitter 5 is arranged in the first positioning ring 32.
Four first positioning threaded holes 201 are formed in the rear end face of the first light source positioning shell 2, and the four first positioning threaded holes 201 are respectively arranged at four end corners of the first light source positioning shell 2; a first jacking screw 6 is spirally connected in each first positioning threaded hole 201, and the end head part of the first jacking screw 6 is connected with the second light source positioning shell 3.
All there is first ladder groove 21 seted up on the first light source location shell 2 between four first location screw holes 201, and first retainer ring 32 adaptation joint is in the anterior in first ladder groove 21, and the rear portion joint of laser emitter 5 is in the rear portion in first ladder groove 21.
The laser signal receiving shell 1 is in a circular shell shape, and a laser receiving lens and a photodiode assembly for receiving a laser wave band are arranged in the laser signal receiving shell 1.
The first light source positioning shell 2 is in a rectangular shell shape, the upper end surface of the first light source positioning shell 2 is an arc-shaped concave surface, a first positioning shell installation groove 22 is formed in the first light source positioning shell 2, and the first positioning shell installation groove 22 is communicated with the first step groove 21;
the second light source positioning shell 3 is connected in the first positioning shell mounting groove 22 and the first step groove 21 in a matching way; the upper end face of the first light source positioning 3 shell is fixedly connected with the upper end face of the laser signal receiving shell 1 in a matched mode.
The second light source positioning shell 3 is in a rectangular shell shape, a second positioning shell mounting groove 34 is formed in the second light source positioning shell 3, and the second positioning shell mounting groove 34 is communicated with the first positioning shell hole 31; the second positioning housing mounting groove 34 is stepped groove shaped and the first lens assembly 4 is attached in the front portion of the second positioning housing mounting groove 34.
The first lens assembly 4 includes a collimating lens 41, a first lens protective housing 42 is sleeved outside the collimating lens 41, and the first lens protective housing 42 is in interference fit in the second positioning housing installation groove 34. Four first screw rod positioning blind holes 33 are formed in the rear end face of the second light source positioning shell 3, and the four first screw rod positioning blind holes 33 are respectively formed in four end corners of the rear portion of the second light source positioning shell 3.
The first screw positioning blind hole 33 is a round hole with a smooth inner wall, and the radius value of the first screw positioning blind hole 33 is larger than that of the rod body of the first jacking screw 6.
In the light source adjusting device for the handheld laser methane telemeter, a novel first light source positioning shell 2 and a novel second light source positioning shell 3 which are used for positioning and connecting the collimating lens 41 and the laser emitter 5 are arranged. Still be provided with four first jack-up screw rods 6 that are used for adjusting 3 inclination of second light source location shell among this adjusting device, the back is advanced soon to a first jack-up screw rod among four first jack-up screw rods 6, and the inclination can take place for the position of second light source location shell 3 at corresponding position, and second light source location shell 3 takes place to incline the back, can adjust collimating lens 41's inclination to can make collimating lens 41 and laser emitter 5 adjust on same central axis. This allows the first lens assembly 4 to be adjustable over a range of spaces that are much larger than the different axes caused by processing and assembly errors of the optical system.
Be provided with first retainer ring 32 on the second light source location shell 3 in the first retainer shell hole 31 outside in this application, first retainer ring 32 can carry out better installation location. The outer cooperation face of the tip of first retainer ring 32 is the notch form, and first retainer ring 32 and the cooperation back of first step groove 21, two cooperation faces can furthest's reduction frictional resistance, can guarantee moreover that laser signal receiving shell 1 is under the fixed circumstances, and second light source location shell can rotate round the centre of sphere. The whole light source adjusting device is simple in structure, convenient to machine and install, high in fault tolerance rate, convenient to adjust light in the later period and high in practicability.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (7)
1. A light source adjusting device for a handheld laser methane telemeter is characterized by comprising a laser signal receiving shell, wherein the lower end of the rear part of the laser signal receiving shell is connected with a first light source positioning shell, a second light source positioning shell is arranged in the first light source positioning shell, a first lens component is arranged in the front part of the second light source positioning shell, a first positioning shell hole is formed in the rear end face of the second light source positioning shell, a first positioning ring is arranged on the second light source positioning shell outside the first positioning shell hole, and a laser emitter is arranged in the first positioning ring;
the rear end surface of the first light source positioning shell is provided with four first positioning threaded holes which are respectively arranged on four end corners of the first light source positioning shell; a first jacking screw rod is spirally connected in each first positioning threaded hole, and the end head part of each first jacking screw rod is connected with the second light source positioning shell; all have first ladder groove seted up on the first light source location shell between four first location screw holes, first retaining ring adaptation joint is in the front portion in first ladder groove, and laser emitter's rear portion joint is in the rear portion in first ladder groove.
2. The light source adjusting device for the handheld laser methane telemeter according to claim 1, wherein the laser signal receiving housing is in a circular shell shape, and a laser receiving lens and a photodiode assembly for receiving a laser band are arranged in the laser signal receiving housing.
3. The light source adjusting device for the hand-held laser methane telemeter according to claim 1, wherein the first light source positioning shell is rectangular in shell shape, the upper end surface of the first light source positioning shell is an arc-shaped concave surface, a first positioning shell mounting groove is formed in the first light source positioning shell, and the first positioning shell mounting groove is communicated with the first step groove;
the second light source positioning shell is connected in the first positioning shell mounting groove and the first step groove in a matching manner; the upper end face of the first light source positioning shell is matched and fixedly connected with the upper end face of the laser signal receiving shell.
4. The light source adjusting device for the hand-held laser methane telemeter according to claim 1, wherein the second light source positioning housing is rectangular in shape, a second positioning housing mounting groove is formed in the second light source positioning housing, and the second positioning housing mounting groove is communicated with the first positioning housing hole; the second positioning shell mounting groove is in a stepped groove shape, and the first lens assembly is connected in the front part of the second positioning shell mounting groove.
5. The light source adjustment device of claim 4, wherein the first lens assembly comprises a collimating lens, the collimating lens is sleeved with a first lens protection shell, and the first lens protection shell is in interference fit with the second positioning shell installation groove.
6. The light source adjusting device for the hand-held laser methane telemeter according to claim 4, wherein four first screw positioning blind holes are formed in the rear end face of the second light source positioning shell, and the four first screw positioning blind holes are respectively formed in four end corners of the rear portion of the second light source positioning shell.
7. The light source adjusting device for the hand-held laser methane telemeter according to claim 6, wherein the first screw positioning blind hole is a round hole with a smooth inner wall, and the radius value of the first screw positioning blind hole is larger than the radius value of the body of the first jacking screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641375.0U CN210923467U (en) | 2019-09-29 | 2019-09-29 | Light source adjusting device for handheld laser methane telemeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641375.0U CN210923467U (en) | 2019-09-29 | 2019-09-29 | Light source adjusting device for handheld laser methane telemeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210923467U true CN210923467U (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921641375.0U Active CN210923467U (en) | 2019-09-29 | 2019-09-29 | Light source adjusting device for handheld laser methane telemeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210923467U (en) |
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2019
- 2019-09-29 CN CN201921641375.0U patent/CN210923467U/en active Active
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