Laser range finder
By using a combination of one laser emitter and two prisms in the laser rangefinder, the laser light is deflected by 90 degrees to form parallel light, which solves the problem that laser points A and B are difficult to emit parallel, and achieves high-precision and efficient measurement of the target object length.
Patent Information
- Application Number
- CN202422290582.3
- 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
In marine operations, existing laser rangefinders are difficult to ensure that laser points A and B emit parallel light, resulting in low measurement accuracy and low production efficiency.
Using a laser emitter plus two prisms, a 45° or pentaprism deflects the laser light by 90 degrees to form parallel light, avoid adjusting the installation position of the prism and ensuring that the light is emitted in parallel.
It improves measurement accuracy and installation and commissioning efficiency, reduces production costs, and improves the measurement accuracy and production efficiency of laser rangefinders.
Smart Images
Figure CN223155236U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of measurement technology, and particularly relates to a laser rangefinder. Background Art
[0002] During ocean operations, it is usually necessary to determine the length of a target object. Due to the complexity of the ocean environment, devices such as laser rangefinders are usually needed for measurement. As Figure 1 shown in the figure, A and B in the figure represent two laser points. By the actual distance between the laser points and the ratio of the distance between the laser points to the length of the object, the length L of the target object can be solved.
[0003] Currently, the laser rangefinder emits parallel light beams and the light beams are perpendicular to the surface of the object to be measured to ensure accurate measurement of the object length under the premise of simple calculation. However, in the actual production process, how to ensure that parallel light is emitted from A and B is a thorny problem. The installation of laser points A and B requires extremely high installation accuracy and multiple adjustments to ensure that parallel light is emitted from laser points A and B, which reduces production efficiency, increases production costs, and in actual production, parallel light is often not emitted, affecting the final measurement accuracy.
[0004] Therefore, there is an urgent need for a laser rangefinder for measuring the length of a target object with high measurement accuracy and high installation and debugging efficiency. Utility Model Content
[0005] The purpose of this application is to provide a laser rangefinder for measuring the length of a target object with high measurement accuracy and high installation and debugging efficiency.
[0006] The embodiments of this application can be implemented through the following technical solutions:
[0007] A laser rangefinder for realizing the length measurement of a target object, including a housing, a mounting end plate, a laser emitter, and a transmissive-reflective prism. The mounting end plate is connected to both ends of the housing. The laser emitter is installed 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 inside of the housing;
[0008] The transmissive-reflective prism includes a first prism and a second prism. The first prism and the second prism are sequentially installed 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 transmitted to the second prism, and is reflected by the first prism and the second prism to form parallel light and is 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] Furthermore, the housing includes a shell and a connecting plate. The connecting plate is connected to both ends of the shell 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 clamped in the first groove and the second groove simultaneously.
[0012] Furthermore, the housing further includes light-transmitting holes. The number of the light-transmitting holes is at least two. The light-transmitting holes are formed on the peripheral side of the shell and are aligned with the reflection light directions of the first prism and the second prism.
[0013] Furthermore, a third groove is formed on the peripheral side of the mounting end plate. The third groove is located at the part where the mounting end plate extends into the shell. A sealing ring is clamped in the third groove and is in interference fit with the inner wall of the shell.
[0014] Furthermore, it further includes a mounting plate. The mounting plate includes a first mounting plate and a second mounting plate which are arranged along the length direction of the housing and are connected inside the housing. The first prism and the second prism are mounted between the first mounting plate and the second mounting plate.
[0015] Preferably, the mounting plate further includes at least two groups of accommodating grooves arranged oppositely. 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 and the second 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 part. The sliding part is connected to 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 part. A rib which is slidably connected to the sliding groove is arranged on the side of the first mounting plate and / or the second mounting plate facing the sliding part.
[0018] The laser rangefinder provided by the embodiment of the present application has at least the following beneficial effects:
[0019] The present application ensures the emission of parallel light by means of one laser emitter plus two prisms in cooperation, avoiding the emission of parallel light by adjusting the installation positions of the two 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.
[0020] The prism in this application is a 45° beam splitter or a pentaprism, both of which can deflect light by 90°, thus ensuring that parallel light rays are emitted parallelly. The optical characteristics of the pentaprism result in no specific positional setting relationship between the light incident surface and the incident light rays, 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 length measurement principle of the laser rangefinder;
[0022] Figure 2 is the overall structure diagram of a laser rangefinder in this application;
[0023] Figure 3 is the exploded view of a laser rangefinder in this application;
[0024] Figure 4 is the overall structure diagram of a laser rangefinder in this application with the outer shell hidden;
[0025] Figure 5 is the overall structure diagram of the outer shell in this application;
[0026] Figure 6 is the cross-sectional view of the outer shell in this application.
[0027] Reference Numerals: A, laser spot; B, laser spot; L, length of the target object; 1, outer shell; 11, housing; 12, light-transmitting hole; 13, connecting plate; 131, second groove; 14, sliding part; 141, sliding groove; 2, mounting end plate; 21, first groove; 22, snap ring; 23, third groove; 24, sealing ring; 3, laser emitter; 41, first prism; 42, second prism; 5, mounting plate; 51, first mounting plate; 52, second mounting plate; 53, accommodating groove; 54, rib. Detailed Description of the Embodiments
[0028] Hereinafter, the present application will be further described based on the preferred embodiments with reference to the drawings.
[0029] The vocabulary in this specification is used to describe the embodiments of the present application, but is not intended to limit the present application. Unless otherwise clearly defined and limited, if the terms "set", "connected", and "connected" appear, 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 the present application can be specifically understood.
[0030] 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.
[0031] The present application provides a laser rangefinder for measuring the length of a target object. Figures 2 - 4 The overall structure diagram, exploded view, and overall structure diagram with the housing 1 hidden of the laser rangefinder in the present application are respectively shown. As Figures 2 - 4 shown, the laser rangefinder includes a housing 1, a mounting end plate 2, a laser emitter 3, and a transmission and reflection 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 transmission and reflection prism includes a first prism 41 and a second prism 42. The first prism 41 and the second prism 42 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 transmitted to the second prism 42, and is reflected by the first prism 41 and the second prism 42 to form parallel light rays and is emitted through the side wall of the housing 1. In the present application, a laser is emitted by a laser emitter 3, passes through the first prism 41 and is transmitted to the second prism 42, and the first prism 41 and the second prism 42 can respectively reflect the laser and form two parallel light rays. The parallel light rays can irradiate the surface of the target object, and then based on Figure 1 the length measurement principle in it, the length of the target object is calculated. In the present application, the emission of parallel light rays is ensured by the cooperation of a laser emitter 3 and two transmission and reflection prisms, avoiding the emission of parallel light rays by adjusting the installation positions of the two prisms. Installing their positions based on the characteristics of the prisms themselves has the advantages of high measurement accuracy and high installation and debugging efficiency compared with the laser emitter 3.
[0032] 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 rays by 90 degrees and emit them, 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 rays can be ensured.
[0033] In some other specific embodiments of the present application, as Figure 3 shown, the first prism 41 and the second prism 42 are pentaprisms. The optical characteristic of the pentaprism is to deflect the incident light rays by 90° and emit them. 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 debug the incident light surfaces of the first prism 41 and the second prism 42, further ensuring the parallel emission of the reflected light rays.
[0034] In some preferred embodiments of the present application, the reflected parallel light rays are perpendicular to the surface of the target object, which can reduce the calculations generated by correction and improve the operation speed of the control system of the laser rangefinder.
[0035] Furthermore, as Figure 3 and Figure 5 shown, to stably install the first prism 41 and the second prism 42 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 and the second prism 42 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 and the second prism 42 by clamping and fixing the first prism 41 and the second prism 42.
[0036] In some specific embodiments of the present application, to ensure the stability of the connection between the first prism 41 and the second prism 42, 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, and to realize the stable clamping of the first prism 41 and the second prism 42.
[0037] In some preferred embodiments of the present application, to ensure the installation stability of the first prism 41 and the second prism 42, as Figure 3 and Figure 4 shown, the mounting plate 5 further includes at least two groups of oppositely arranged receiving grooves 53. The receiving grooves 53 are opened 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 and the second prism 42 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 realizes the limitation of the first prism 41 and the second prism 42 through the receiving grooves 53, so as to realize the stable connection of the first prism 41 and the second prism 42 by cooperating with clamping on the basis of limitation.
[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 3 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. 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 3 and Figure 4As 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 one end of the mounting end plate 2 facing the cavity of the housing 1, so as to achieve a stable connection with the mounting end plate 2, such that the fixation of the position of the mounting plate 5 in the housing 1 can be realized without additionally setting other structures.
[0040] In some specific embodiments of the present application, such as Figure 5 and Figure 6 As 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 portion 14 is connected inside the cavity of the housing 1 and extends along the length direction of the housing 1. At least one chute 141 extending along the length direction of the housing 1 is formed on the sliding portion 14. A rib 54 slidably connected to the chute 141 is provided on one side of the first mounting plate 51 and / or the second mounting plate 52 facing the sliding portion 14. The rib 54 and the chute 141 are slidably matched to achieve the sliding connection between the mounting plate 5 and the housing 1.
[0042] Such as Figure 5 and Figure 6 As shown, in some specific embodiments of the present application, the number of the chutes 141 is two. In actual production, the number of the chutes 141 and the ribs 54 can be set based on actual needs.
[0043] The following will introduce other structures of the housing 1 in detail. Such as Figure 3 As shown, the housing 1 further 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. The housing 1 is snap-connected to the mounting end plate 2 through the connecting plate 13.
[0044] Specifically, as Figures 3 - 5 As shown, a first groove 21 is formed on the mounting end plate 2. A second groove 131 aligned with the first groove 21 is formed on the connecting plate 13. A snap ring 22 can be simultaneously snapped into the first groove 21 and the second groove 131 to achieve 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, such as Figure 3 and Figure 4As shown, a vacancy structure for accommodating the connecting plate 13 is provided at the corresponding position of the mounting end plate 2, so that the connecting plate 13 can extend into the vacancy structure and 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 housing 1, as Figure 2 and Figure 5 shown, the housing 1 further includes light-transmitting holes 12. The number of the light-transmitting holes 12 is at least two. The light-transmitting holes 12 are provided on the circumferential side of the housing body 11 and are aligned with the reflection light directions of the first prism 41 and the second prism 42.
[0047] Specifically, to ensure the stable connection between the mounting end plate 2 and the housing 1, as Figure 3 and Figure 4 shown, a third groove 23 is provided on the circumferential 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 body 11. The sealing ring 24 is clamped in the third groove 23 and is in interference fit with the inner wall of the housing body 11.
[0048] In some preferred embodiments of the present application, the housing body 11 is a cylindrical structure, which can fit with the user's palm for easy carrying. The cross-section of the mounting end plate 2 is a circular cross-section matching the cross-section of the housing body 11. It can be imagined that the housing body 11 can also be a square cross-section, a triangular cross-section or other regular or irregular cross-sectional shapes. No matter what structure it is, as long as it can meet the user's usage requirements, the mounting end plate 2 is set to a structure matching the housing body 11 based on the cross-section of the housing body 11.
[0049] The specific implementation manners of the present application have been introduced 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 belong to the protection scope of the claims of the present application.
Claims
1. A laser rangefinder for measuring the length 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) and a second prism (42). The first prism (41) and the second prism (42) 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 transmitted to the second prism (42), and is reflected by the first prism (41) and the second prism (42) to form parallel light rays and 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 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 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 simultaneously clamped in the first groove (21) and the second groove (131).
5. The laser rangefinder according to claim 4, characterized in that: The housing (1) further includes light-transmitting holes (12). The number of the light-transmitting holes (12) is at least two. The light-transmitting holes (12) are formed on the peripheral side of the housing body (11) and are aligned with the reflection light ray directions of the first prism (41) and the second prism (42).
6. The laser rangefinder according to claim 4, characterized in that: 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 body (11). A sealing ring (24) is clamped in the third groove (23) and is in interference fit with the inner wall of the housing body (11).
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) and the second prism (42) are mounted between the first mounting plate (51) and the second mounting plate (52).
8. A laser rangefinder according to claim 7, wherein: The mounting plate (5) further includes at least two groups of accommodating grooves (53) arranged oppositely. The accommodating 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) and the second prism (42) facing the first mounting plate (51) and the second mounting plate (52) are in contact with the inner sides of the accommodating grooves (53).
9. A laser rangefinder according to claim 7, wherein: 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, wherein: 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 formed on the sliding part (14). A rib (54) slidably connected to the sliding groove (141) is arranged on the side of the first mounting plate (51) and / or the second mounting plate (52) facing the sliding part (14).