CN221261238U - Handheld high-precision range finder - Google Patents
Handheld high-precision range finder Download PDFInfo
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- CN221261238U CN221261238U CN202323009335.3U CN202323009335U CN221261238U CN 221261238 U CN221261238 U CN 221261238U CN 202323009335 U CN202323009335 U CN 202323009335U CN 221261238 U CN221261238 U CN 221261238U
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- reflecting mirror
- laser generator
- laser
- photosensitive sensor
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Abstract
The utility model provides a handheld high-precision range finder, which comprises a cylindrical outer shell body composed of a light-emitting part and a holding part, wherein a laser generator and a photosensitive sensor are arranged in the light-emitting part, and a battery and an operation panel are arranged in the holding part; the end face of the light-emitting part comprises a photosensitive sensor and an annular lens, the laser generator is coaxially arranged inside the light-emitting part, a beam splitting prism is arranged at one light-emitting end of the laser generator, a first reflecting mirror is arranged on the back face of the photosensitive sensor, and the laser generator further comprises a second reflecting mirror facing the first reflecting mirror. The utility model simultaneously carries out laser ranging for multiple times, the light sources of the lasers are consistent, no time difference exists, the same laser beam is used for completing parallel measurement for multiple times on the same piece, and then the detection result is averaged, so that more accurate data can be obtained through single measurement. Not only improves the laser detection precision, but also does not need additional operation, saves time and improves the working efficiency.
Description
Technical Field
The utility model relates to the technical field of laser ranging, in particular to a handheld high-precision range finder.
Background
A laser range finder is an instrument for measuring distance by using laser. The action principle is very simple: the distance is determined by measuring the time from when the laser begins to emit until the laser reflects off of the target. In order to transmit and receive laser and to time, the laser distance meter consists of a laser generator, a receiver, a clock frequency oscillator, a distance counter and the like.
The laser rangefinder commonly used at present is a pulse laser rangefinder. The principle is that a beam or a series of short pulse laser beams are emitted to the target during operation, the photoelectric element receives the laser beams reflected by the target, the timer measures the time from the emission to the receiving of the laser beams, and the distance from the range finder to the target is calculated. When the power of the emitted laser beam is enough, the measuring distance can reach about 40 km or even more, the laser range finder can work day and night, but when substances with higher laser absorptivity exist in the space, the distance and the accuracy of the distance measurement can be reduced.
As the price of laser rangefinders continues to decrease, the industry is gradually beginning to use laser rangefinders. A batch of novel miniature rangefinders with the advantages of quick ranging, small volume, reliable performance and the like appear at home and abroad, and can be widely applied to the fields of industrial measurement and control, mines, ports and the like. The laser range finder can also be used for tracking and ranging artificial satellites, measuring the flying height of an airplane, aiming and ranging targets, surveying and mapping the topography, surveying and the like.
At present, a large amount of small-sized handheld laser rangefinders are used in industries such as construction, but the small-sized laser rangefinders have certain problems. Because the reflecting surface of the laser range finder is not a smooth surface generally, a certain rugged place is formed in many times, and meanwhile, the reflecting surface is possibly inclined, so that a large error exists in single measurement, and accurate data can be obtained by measuring the average value for many times. This results in more effort and time waste. There is therefore a need for a more accurate hand-held laser rangefinder.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model provides a handheld high-precision range finder, which solves the problems that in the prior art, errors exist in single measurement due to uneven reflecting surface, and in order to overcome the errors, multiple measurements are needed, so that the workload is increased.
According to the embodiment of the utility model, the handheld high-precision range finder comprises an outer shell, wherein the outer shell is of a closed cylindrical structure and comprises a light-emitting part and a holding part which are arranged front and back, a laser generator and a photosensitive sensor are arranged in the light-emitting part and used for receiving and transmitting laser, and a battery and an operation panel are arranged in the holding part;
The end face of the light-emitting part far away from one end of the holding part comprises a disc-shaped photosensitive sensor and an annular lens wound outside the photosensitive sensor, the laser generator is coaxially arranged inside the light-emitting part, one light-emitting end of the laser generator is provided with a light-splitting prism, one side of scattered light of the light-splitting prism is provided with a first reflecting mirror which is positioned on the back of the photosensitive sensor and faces the laser generator, the end head of the laser generator is provided with an annular second reflecting mirror, the second reflecting mirror faces the first reflecting mirror, and the diameter of the second reflecting mirror is matched with the outer diameter of the annular lens, so that light passing through the second reflecting mirror is emitted from the annular lens.
Further, a recessed plane area is formed on the side surface of the holding part, and the operation panel is arranged in the plane area.
Further, the outer coaxial sleeve of the laser generator is provided with a closed sleeve, and the tail end of the closed sleeve is connected with the beam splitting prism, so that one end of incident light of the beam splitting prism only receives light emitted by the laser generator.
Furthermore, the emergent light of the beam splitting prism passes through the first reflecting mirror and the second reflecting mirror to form parallel light, and the parallel light vertically passes through the environmental glass to be emitted.
Further, the environmental glass is unidirectional glass, and the side close to the outside has high reflectance to incident light.
Further, the first reflecting mirror and the photosensitive sensor have the same area, and the diameters of the first reflecting mirror and the photosensitive sensor are not more than half of the diameter of the second reflecting mirror.
Compared with the prior art, the utility model has the following beneficial effects:
According to the utility model, a single laser beam is divided into a plurality of beams of light through the beam splitting prism, then a plurality of beams of light simultaneously pass through the annular lens to be emitted to the outside through the cooperation of the first reflecting mirror and the second reflecting mirror, so that laser ranging is simultaneously carried out for a plurality of times, the light sources of the lasers are consistent, no time difference exists, and further, the same laser beam is used for completing parallel measurement for a plurality of times, and then the detection result is averaged, so that more accurate data can be obtained through single measurement. Not only improves the laser detection precision, but also does not need additional operation, saves time and improves the working efficiency.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
Fig. 2 is a schematic side view of an internal structure of an embodiment of the present utility model.
Fig. 3 is a schematic diagram of an optical path in an embodiment of the present utility model.
In the above figures: 1. a light emitting section; 2. a grip portion; 3. a photosensitive sensor; 4. an annular lens; 5. a laser generator; 6. a beam-splitting prism; 7. a first mirror; 8. a second mirror; 9. a closing sleeve; 21. an operation panel.
Detailed Description
The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, an embodiment of the present utility model provides a handheld high-precision range finder, which includes an outer shell, wherein the outer shell has a closed cylindrical structure, and includes a light emitting portion 1 and a holding portion 2 that are disposed front and back, a laser generator 5 and a photosensitive sensor 3 are disposed in the light emitting portion 1, and are used for receiving and transmitting laser, and a battery and an operation panel 21 are disposed in the holding portion 2. In this embodiment, a recessed plane area is provided on the side surface of the holding portion 2, and the operation panel 21 is disposed in the plane area, so as to set a larger liquid crystal display screen, facilitate man-machine interaction, and better observe the detection result. A digital element such as a CPU is further provided in the grip portion 2, and the received optical signal is processed and converted into a distance value, which is then displayed.
As shown in fig. 2, in this embodiment, the end face of the light emitting portion 1 far away from one end of the holding portion 2 includes a disc-shaped photosensitive sensor 3 and an annular lens 4 wound outside the photosensitive sensor 3, the laser generator 5 is coaxially disposed inside the light emitting portion 1, one light emitting end of the laser generator is provided with a light splitting prism 6, one side of scattered light of the light splitting prism 6 is provided with a first reflecting mirror 7 located at the back of the photosensitive sensor 3 and facing the laser generator 5, an annular second reflecting mirror 8 is disposed at the end of the laser generator 5, the second reflecting mirror 8 faces the first reflecting mirror 7, and the diameter of the second reflecting mirror 8 matches with the outer diameter of the annular lens 4, so that light passing through the second reflecting mirror 8 is emitted from the annular lens 4. In this embodiment, the single laser beam emitted from the laser generator 5 is split into multiple beams by the beam splitter prism 6, and then several beams of light simultaneously pass through the annular lens 4 to be emitted to the outside through the cooperation of the first reflecting mirror 7 and the second reflecting mirror 8, so that the same beam of laser beam is used for simultaneously carrying out multiple laser ranging, and the operation of multiple measurement is simplified.
Preferably, the first mirror 7 and the photosensor 3 have the same area and both have a diameter not greater than half the diameter of the second mirror 8. Thus, more reflected light can leave the light-emitting part 1 and enter the outside to perform laser ranging, so that the number of times of measuring is increased, and the detection precision is further improved.
As shown in fig. 3, in a further aspect of this embodiment, a sealing sleeve 9 is coaxially sleeved outside the laser generator 5, and the end of the sealing sleeve 9 is connected with the beam splitter prism 6, so that the incident light end of the beam splitter prism 6 only receives the light emitted by the laser generator 5. Therefore, no other light reflected by the second reflecting mirror 8 passes through the beam splitting prism 6 again, so that the original incident light is prevented from being interfered. Similarly, the outgoing light of the beam splitter prism 6 passes through the first reflecting mirror 7 and the second reflecting mirror 8 to form parallel light, and then is emitted vertically through the environmental glass. The reflected light passing through the second reflecting mirror 8 is prevented from entering the first reflecting mirror 7 again, repeated reflection is formed, the internal light path is disturbed, and the detection result is influenced. Correspondingly, the environmental glass is unidirectional glass, and the side close to the outside has high reflectance to incident light. This can prevent the light reflected on the reflecting surface from entering the light emitting section 1 again, and thus, the emitted light is disturbed.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (6)
1. A handheld high accuracy distancer, its characterized in that: the portable laser device comprises an outer shell, wherein the outer shell is of a closed cylindrical structure and comprises a light-emitting part and a holding part which are arranged front and back, a laser generator and a photosensitive sensor are arranged in the light-emitting part and used for receiving and transmitting laser, and a battery and an operation panel are arranged in the holding part;
The end face of the light-emitting part far away from one end of the holding part comprises a disc-shaped photosensitive sensor and an annular lens wound outside the photosensitive sensor, the laser generator is coaxially arranged inside the light-emitting part, one light-emitting end of the laser generator is provided with a light-splitting prism, one side of scattered light of the light-splitting prism is provided with a first reflecting mirror which is positioned on the back of the photosensitive sensor and faces the laser generator, the end head of the laser generator is provided with an annular second reflecting mirror, the second reflecting mirror faces the first reflecting mirror, and the diameter of the second reflecting mirror is matched with the outer diameter of the annular lens, so that light passing through the second reflecting mirror is emitted from the annular lens.
2. A hand-held high accuracy rangefinder as in claim 1 wherein: the side surface of the holding part is provided with a concave plane area, and the operation panel is arranged in the plane area.
3. A hand-held high accuracy rangefinder as in claim 1 wherein: the laser generator is characterized in that a sealing sleeve is coaxially sleeved outside the laser generator, and the tail end of the sealing sleeve is connected with the beam splitting prism, so that one end of incident light of the beam splitting prism only receives light emitted by the laser generator.
4. A hand-held high accuracy rangefinder as in claim 1 wherein: the emergent light of the beam splitting prism passes through the first reflecting mirror and the second reflecting mirror to form parallel light, and the parallel light vertically passes through the environmental glass to be emitted.
5. A hand-held high accuracy rangefinder as in claim 1 wherein: the ambient glass is unidirectional glass, and the side close to the outside has high reflectance to incident light.
6. A hand-held high accuracy rangefinder as in claim 1 wherein: the first reflecting mirror and the photosensitive sensor have the same area, and the diameters of the first reflecting mirror and the photosensitive sensor are not larger than half of the diameter of the second reflecting mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323009335.3U CN221261238U (en) | 2023-11-03 | 2023-11-03 | Handheld high-precision range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323009335.3U CN221261238U (en) | 2023-11-03 | 2023-11-03 | Handheld high-precision range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221261238U true CN221261238U (en) | 2024-07-02 |
Family
ID=91655878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323009335.3U Active CN221261238U (en) | 2023-11-03 | 2023-11-03 | Handheld high-precision range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221261238U (en) |
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2023
- 2023-11-03 CN CN202323009335.3U patent/CN221261238U/en active Active
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