Laser range finder
Through a combined design of one laser emitter and three prisms, the 45° spectrometer or pentaprism deflection laser is used to solve the problem that parallel light in the laser rangefinder is difficult to guarantee, and high-precision and high-efficiency measurement of the target object size and distance.
Patent Information
- Application Number
- CN202422294873.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-19
AI Technical Summary
It is difficult for existing laser rangefinders to ensure that the two laser emitting devices emit parallel light in marine operations, resulting in high installation accuracy and low commissioning efficiency, which affects measurement accuracy and production costs.
The design of one laser emitter plus three prisms is adopted, and the laser light is deflected by 90° using a 45° spectrometer or pentaprism to form parallel and intersecting light, avoiding the complex installation process of adjusting the position of the prism.
It improves measurement accuracy and installation and commissioning efficiency, reduces production costs, and ensures the measurement accuracy and operation ease of the laser rangefinder.
Smart Images
Figure CN223155237U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of measurement, and particularly to a laser rangefinder. Background Art
[0002] During ocean operations, it is usually necessary to measure the size of a target object and the distance to the target object. Due to the complex ocean environment, devices such as laser rangefinders are usually required for measurement. Currently, a laser rangefinder measures the size and distance of an object through three laser emission devices. Two of the laser emission devices emit two parallel light rays, and after the third laser emission device emits a light ray that intersects the parallel light rays, the size of the target object can be calculated based on the distance between the target objects by combining relevant calculations of a triangle.
[0003] However, in the actual production process, how to ensure that two of the laser emission devices emit parallel light rays is a thorny problem. The installation of these two laser emission devices requires extremely high installation accuracy and multiple adjustments to ensure the emission of parallel light rays, which reduces production efficiency, increases production costs, and in actual production, the emission of parallel light rays is often not achieved, affecting the final measurement accuracy.
[0004] Therefore, there is an urgent need for a laser rangefinder that can measure the size and distance of a target object with high measurement accuracy and high installation and debugging efficiency. Summary of the Utility Model
[0005] The purpose of the present application is to provide a laser rangefinder that can measure the size and distance of a target object with high measurement accuracy and high installation and debugging efficiency.
[0006] The embodiments of the present application can be implemented through the following technical solutions:
[0007] A laser rangefinder for measuring the length and distance of a target object, comprising a housing, a mounting end plate, a laser emitter, and a transmission and reflection prism. The mounting end plate is connected to both ends of the housing. The laser emitter is mounted on one of the mounting end plates along the length direction of the housing, and the laser of the laser emitter is emitted towards the interior of the housing.
[0008] The transmission and reflection prism includes a first prism, a second prism, and a third prism. The first prism, the second prism, and the third prism are sequentially mounted in the cavity of the housing along the length direction of the housing. The laser emitted by the laser emitter passes through the first prism and is sequentially transmitted to the second prism and the third prism, and is reflected by the first prism, the second prism, and the third prism to form two parallel laser beams and a laser beam that intersects the parallel laser beams. The reflected laser beams are emitted through the side wall of the housing.
[0009] Optionally, the first prism and the second prism are 45° beam splitters, and the laser emitted by the laser emitter is perpendicular to the incident light surfaces of the first prism and the second prism.
[0010] Optionally, the first prism and the second prism are pentaprisms.
[0011] Preferably, the third prism is an isosceles right triangular prism.
[0012] Further, the housing includes a housing body and a connecting plate. The connecting plate is connected to both ends of the housing body in the length direction. A first groove is formed on the mounting end plate, and a second groove aligned with the first groove is formed on the connecting plate. A snap ring can be simultaneously clamped in the first groove and the second groove.
[0013] Further, the housing further includes light-transmitting holes. The number of the light-transmitting holes is at least three. The light-transmitting holes are formed on the circumferential side of the housing body and are aligned with the reflection light directions of the first prism, the second prism, and the third prism.
[0014] Further, it further includes a mounting plate. The mounting plate includes a first mounting plate and a second mounting plate disposed along the length direction of the housing and connected inside the housing. The first prism, the second prism, and the third prism are mounted between the first mounting plate and the second mounting plate.
[0015] Preferably, the mounting plate further includes at least three groups of oppositely arranged accommodating grooves. The accommodating grooves are formed on the sides of the first mounting plate and the second mounting plate facing each other. The sides of the first prism, the second prism, and the third prism facing the first mounting plate and the second mounting plate are in contact with the inner sides of the accommodating grooves.
[0016] Preferably, one end of the first mounting plate and / or the second mounting plate in the length direction is connected to one of the mounting end plates.
[0017] Preferably, the housing includes at least one sliding portion. The sliding portion is connected inside the cavity of the housing and extends along the length direction of the housing. At least one sliding groove extending along the length direction of the housing is formed on the sliding portion. A rib slidably connected to the sliding groove is provided on the side of the first mounting plate and / or the second mounting plate facing the sliding portion.
[0018] The laser rangefinder provided by the embodiment of the present application has at least the following beneficial effects:
[0019] This application ensures the emission of parallel light and intersecting light through a combination of a laser emitter and three prisms, avoiding the emission of parallel light and intersecting light by adjusting the installation positions of the three prisms. Based on the characteristics of the prism itself, installing its position has the advantages of high measurement accuracy and high installation and debugging efficiency compared to the laser emitter.
[0020] The prism in this application is a 45° beam splitter or a pentaprism, both of which can deflect light by 90°, thus ensuring the parallel emission of parallel light. The optical characteristics of the pentaprism result in no specific positional setting relationship between the light incident surface and the incident light, making the installation and debugging efficiency of the pentaprism higher than that of the 45° beam splitter. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is the overall structure diagram of a laser rangefinder in this application;
[0022] Figure 2 is the exploded view of a laser rangefinder in this application;
[0023] Figure 3 is the overall structure diagram of a laser rangefinder in this application with the housing hidden;
[0024] Figure 4 is the overall structure diagram of the housing in this application;
[0025] Figure 5 is the cross-sectional view of the housing in this application.
[0026] Reference numerals: 1. Housing, 11. Shell, 12. Light-transmitting hole, 13. Connecting plate, 131. Second groove, 14. Sliding part, 141. Chute, 2. Installation end plate, 21. First groove, 22. Snap ring, 23. Third groove, 24. Sealing ring, 3. Laser emitter, 41. First prism, 42. Second prism, 43. Third prism, 5. Installation plate, 51. First installation plate, 52. Second installation plate, 53. Accommodation groove, 54. Rib. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] Hereinafter, this application will be further described based on the preferred embodiments with reference to the drawings.
[0028] The terms used in this specification are for the purpose of describing the embodiments of this application, but are not intended to limit this application. Unless otherwise clearly defined and limited, if the terms "set", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.
[0029] In addition, in the description of the embodiments of the present application, for the convenience of understanding, various components on the drawings are enlarged or reduced, but this approach is not intended to limit the protection scope of the present application.
[0030] The present application provides a laser rangefinder for measuring the length and distance of a target object. Figures 1 - 3 The overall structure diagram, explosion diagram, and overall structure diagram with the housing 1 hidden of the laser rangefinder in the present application are respectively shown. As Figures 1 - 3 shown, the laser rangefinder includes a housing 1, a mounting end plate 2, a laser emitter 3, and a transmissive-reflective prism. The mounting end plate 2 is installed at both ends of the housing 1. The laser emitter 3 is installed on one of the mounting end plates 2 along the length direction of the housing 1, and the laser of the laser emitter 3 is emitted towards the inside of the housing 1. Among them, the transmissive-reflective prism includes a first prism 41, a second prism 42, and a third prism 43. The first prism 41, the second prism 42, and the third prism 43 are sequentially installed in the cavity of the housing 1 along the length direction of the housing 1. The laser emitted by the laser emitter 3 passes through the first prism 41 and is sequentially transmitted to the second prism 42 and the third prism 43, and is reflected by the first prism 41, the second prism 42, and the third prism 43 to form two parallel laser beams and a laser beam intersecting with the parallel laser beams. The reflected laser beams are emitted through the side wall of the housing 1. In the present application, a laser emitter 3 emits laser light, which is transmitted to the second prism 42 and the third prism through the first prism 41. The first prism 41, the second prism 42, and the third prism 43 can reflect the laser light and form two parallel light rays and a light ray intersecting with the parallel light rays. The parallel light rays and the intersecting light rays can irradiate the surface of the target object, and then based on the proportional relationship and the relevant calculations of the triangle, the length of the target object and the distance to the target object can be obtained. In the present application, the emission of parallel light rays and intersecting light rays is ensured by the cooperation of one laser emitter 3 and three transmissive-reflective prisms, avoiding the emission of parallel light rays and intersecting light rays by adjusting the installation positions of the three prisms. Based on the characteristics of the prism itself, installing its position has the advantages of high measurement accuracy and high installation and debugging efficiency compared with the laser emitter 3.
[0031] In some specific embodiments of the present application, the first prism 41 and the second prism 42 are 45° beam splitters. The laser emitted by the laser emitter 3 is perpendicular to the incident light surfaces of the first prism 41 and the second prism 42. The first prism 41 and the second prism 42 can deflect the light by 90 degrees and emit it, so as to ensure that as long as the incident light surfaces of the 45° beam splitters are installed vertically, the parallel emission of the reflected light can be ensured.
[0032] In some other specific embodiments of the present application, as Figure 2As shown, the first prism 41 and the second prism 42 are pentaprisms. The optical characteristic of a pentaprism is to deflect the incident light by 90° and emit it. Therefore, the laser on the same optical path can be deflected by the same angle after passing through the first prism 41 and the second prism 42, without the need to adjust the incident surfaces of the first prism 41 and the second prism 42, further ensuring the parallel emission of the reflected light.
[0033] In some preferred embodiments of the present application, the reflected parallel light is perpendicular to the surface of the target object, which can reduce the calculation due to correction and improve the operation speed of the control system of the laser rangefinder.
[0034] In some preferred embodiments of the present application, as Figure 2 shown, the third prism 43 is an isosceles right triangular prism. On the one hand, the isosceles right triangular prism has the total reflection characteristic, which can totally reflect the laser transmitted from the second prism 42 to the third prism 43, making the reflected light bright and ensuring the measurement accuracy and precision; on the other hand, compared with an ordinary mirror, the intersection angle calculation of the isosceles right triangular prism is convenient, making the installation more convenient and simple; on the other hand, the right triangular prism has better stability and strength against mechanical stress, making the installation more stable and firm.
[0035] Furthermore, as Figure 2 and Figure 4 shown, to stably install the first prism 41, the second prism 42, and the third prism 43 in the housing 1, the laser rangefinder further includes a mounting plate 5. The mounting plate 5 includes a first mounting plate 51 and a second mounting plate 52 that are connected to the inside of the housing 1 along the length direction of the housing 1. The first prism 41, the second prism 42, and the third prism 43 are installed between the first mounting plate 51 and the second mounting plate 52. The mounting plate 5 realizes the stable installation of the first prism 41, the second prism 42, and the third prism 43 by clamping and fixing the first prism 41, the second prism 42, and the third prism 43.
[0036] In some specific embodiments of the present application, to ensure the connection stability between the first prism 41, the second prism 42, and the third prism 43, the first mounting plate 51 and the second mounting plate 52 are detachably connected by long bolts, so as to adjust the distance between the first mounting plate 51 and the second mounting plate 52 while ensuring the connection stability, so as to realize the stable clamping of the first prism 41, the second prism 42, and the third prism 43.
[0037] In some preferred embodiments of the present application, to ensure the installation stability of the first prism 41, the second prism 42, and the third prism 43, as Figure 2 and Figure 3As shown, the mounting plate 5 further includes at least three sets of opposing receiving grooves 53. The receiving grooves 53 are formed on the sides of the first mounting plate 51 and the second mounting plate 52 facing each other. The sides of the first prism 41, the second prism 42, and the third prism 43 facing the first mounting plate 51 and the second mounting plate 52 are in contact with the inner sides of the receiving grooves 53. The mounting plate 5 limits the first prism 41, the second prism 42, and the third prism 43 through the receiving grooves 53, so as to cooperate with clamping on the basis of the limitation to achieve stable connection of the first prism 41, the second prism 42, and the third prism 43.
[0038] In some specific embodiments of the present application, the shape of the receiving groove 53 matches the end face shape of its corresponding prism. In some other specific embodiments of the present application, as Figure 2 shown, the shape of the receiving groove 53 may not match the end face shape of its corresponding prism. In this embodiment, the receiving grooves 53 corresponding to the first prism 41 and the second prism 42 are square structures, and the receiving groove 53 corresponding to the third prism 43 is a triangular structure. No matter how the shape of the receiving groove 53 is set, as long as the end face of the corresponding prism can be placed in the receiving groove 53 and be in contact with the receiving groove 53.
[0039] In some specific embodiments of the present application, as Figure 2 and Figure 3 shown, one end of the first mounting plate 51 and / or the second mounting plate 52 along its length direction is connected to one of the mounting end plates 2. One end of the first mounting plate 51 and / or the second mounting plate 52 can extend into the mounting end plate 2 and be connected to the end of the mounting end plate 2 facing the cavity of the housing 1, so as to achieve stable connection with the mounting end plate 2, such that the position of the mounting plate 5 in the housing 1 can be fixed without additionally setting other structures.
[0040] In some specific embodiments of the present application, as Figure 4 and Figure 5 shown, the housing 1 further includes at least one sliding portion 14. The housing 1 is slidably connected to the first mounting plate 51 and / or the second mounting plate 52 through the sliding portion 14 to achieve detachable connection and stable fixation of the mounting plate 5. That is, the housing 1 can be provided with one sliding portion 14, and this sliding portion 14 can be slidably connected to the first mounting plate 51 or the second mounting plate 52. The housing 1 can also be provided with two sliding portions 14, and each sliding portion 14 can be respectively slidably connected to the first mounting plate 51 and the second mounting plate 52.
[0041] Specifically, the sliding part 14 is connected inside the cavity of the outer shell 1 and extends along the length direction of the outer shell 1. At least one sliding groove 141 extending along the length direction of the outer shell 1 is formed on the sliding part 14. A rib 54 slidably connected to the sliding groove 141 is provided on one side of the first mounting plate 51 and / or the second mounting plate 52 facing the sliding part 14. The rib 54 and the sliding groove 141 are slidably matched to realize the sliding connection between the mounting plate 5 and the outer shell 1.
[0042] As Figure 4 and Figure 5 shown, in some specific embodiments of the present application, the number of the sliding grooves 141 is two. In actual production, the numbers of the sliding grooves 141 and the ribs 54 can be set based on actual needs.
[0043] The following will introduce other structures of the outer shell 1 in detail. As Figure 2 shown, the outer shell 1 further includes a housing 11 and a connecting plate 13. The connecting plate 13 is connected to both ends of the housing 11 in the length direction. The outer shell 1 is snap-connected to the mounting end plate 2 through the connecting plate 13.
[0044] Specifically, as Figures 2 - 4 shown, a first groove 21 is formed on the mounting end plate 2, and a second groove 131 aligned with the first groove 21 is formed on the connecting plate 13. A snap ring 22 can be snap-connected into both the first groove 21 and the second groove 131 at the same time, so as to realize the snap connection between the connecting plate 13 and the mounting end plate 2.
[0045] Furthermore, to align the first groove 21 with the second groove 131, as Figure 2 and Figure 3 shown, a vacant structure for accommodating the connecting plate 13 is formed at the corresponding positions of the mounting end plate 2 and the connecting plate 13, so that the connecting plate 13 can extend into the vacant structure to align the first groove 21 and the second groove 131.
[0046] Specifically, to ensure that the light reflected by the first prism 41 and the second prism 42 can be emitted through the outer shell 1, as Figure 1 and Figure 4 shown, the outer shell 1 further includes a light-transmitting hole 12. The number of the light-transmitting holes 12 is at least three. The light-transmitting holes 12 are formed on the peripheral side of the housing 11 and are aligned with the reflection light directions of the first prism 41, the second prism 42, and the third prism 43.
[0047] Specifically, to ensure the stable connection between the mounting end plate 2 and the outer shell 1, as Figure 2 and Figure 3 shown, a third groove 23 is formed on the peripheral side of the mounting end plate 2. The third groove 23 is located at the part where the mounting end plate 2 extends into the housing 11. A sealing ring 24 is snap-connected into the third groove 23 and is in interference fit with the inner wall of the housing 11.
[0048] In some preferred embodiments of the present application, the housing 11 is of a cylindrical structure, which can fit with the user's palm, facilitating carrying. The cross-section of the mounting end plate 2 is a circular cross-section matching the cross-section of the housing 11. It can be imagined that the housing 11 can also have a cross-section of a regular or irregular shape such as a square cross-section or a triangular cross-section. No matter what structure it is, as long as it can meet the user's usage requirements, the mounting end plate 2 can be set to a structure that cooperates with the housing 11 based on the cross-section of the housing 11.
[0049] The specific embodiments of the present application have been described in detail above. For those skilled in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A laser rangefinder for measuring the length and distance of a target object, characterized in that: It includes a housing (1), a mounting end plate (2), a laser emitter (3) and a transmissive-reflective prism. The mounting end plate (2) is connected to both ends of the housing (1). The laser emitter (3) is mounted on one of the mounting end plates (2) along the length direction of the housing (1), and the laser of the laser emitter (3) is emitted towards the inside of the housing (1). The transmissive-reflective prism includes a first prism (41), a second prism (42) and a third prism (43). The first prism (41), the second prism (42) and the third prism (43) are sequentially mounted in the cavity of the housing (1) along the length direction of the housing (1). The laser emitted by the laser emitter (3) passes through the first prism (41) and is sequentially transmitted to the second prism (42) and the third prism (43), and is reflected by the first prism (41), the second prism (42) and the third prism (43) to form two parallel laser beams and a laser beam intersecting with the parallel laser beams. The reflected laser beams are emitted through the side wall of the housing (1).
2. The laser rangefinder according to claim 1, characterized in that: The first prism (41) and the second prism (42) are 45° beam splitters, and the laser emitted by the laser emitter (3) is perpendicular to the incident light surfaces of the first prism (41) and the second prism (42).
3. The laser rangefinder according to claim 1, characterized in that: The first prism (41) and the second prism (42) are pentaprisms.
4. The laser rangefinder according to claim 1, characterized in that: The third prism (43) is an isosceles right triangular prism.
5. The laser rangefinder according to claim 1, characterized in that: The housing (1) includes a housing body (11) and a connecting plate (13). The connecting plate (13) is connected to both ends of the housing body (11) in the length direction. A first groove (21) is provided on the mounting end plate (2), and a second groove (131) aligned with the first groove (21) is provided on the connecting plate (13). A snap ring (22) can be simultaneously clamped in the first groove (21) and the second groove (131).
6. The laser rangefinder according to claim 5, characterized in that: The housing (1) further includes light-transmitting holes (12). The number of the light-transmitting holes (12) is at least three. The light-transmitting holes (12) are provided on the peripheral side of the housing body (11) and are aligned with the reflection light directions of the first prism (41), the second prism (42) and the third prism (43).
7. The laser rangefinder according to claim 1, characterized in that: It further includes a mounting plate (5), and the mounting plate (5) includes a first mounting plate (51) and a second mounting plate (52) which are arranged along the length direction of the housing (1) and are connected inside the housing (1). The first prism (41), the second prism (42), and the third prism (43) are mounted between the first mounting plate (51) and the second mounting plate (52).
8. A laser rangefinder according to claim 7, characterized in that: The mounting plate (5) further includes at least three groups of oppositely arranged accommodating grooves (53). The accommodating grooves (53) are opened on one side of the first mounting plate (51) and the second mounting plate (52) facing each other. One side of the first prism (41), the second prism (42), and the third prism (43) facing the first mounting plate (51) and the second mounting plate (52) abuts against the inner side of the accommodating groove (53).
9. A laser rangefinder according to claim 7, characterized in that: One end of the first mounting plate (51) and / or the second mounting plate (52) along its length direction is connected to one of the mounting end plates (2).
10. A laser rangefinder according to claim 7, characterized in that: The housing (1) includes at least one sliding part (14). The sliding part (14) is connected inside the cavity of the housing (1) and extends along the length direction of the housing (1). At least one sliding groove (141) extending along the length direction of the housing (1) is opened on the sliding part (14). A rib (54) slidably connected to the sliding groove (141) is provided on one side of the first mounting plate (51) and / or the second mounting plate (52) facing the sliding part (14).