Miniature semiconductor laser diode range finder

Abstract

The utility model provides a miniature semiconductor laser diode range finder, which relates to the technical field of range finding, aims to solve the problems of single installation mode and small application range of a laser range finder in the prior art, and comprises a shell, a laser transmitting module and a laser receiving module, the laser transmitting module and the laser receiving module are both mounted on the shell, a first mounting part is arranged at the head end of the shell, second mounting parts are arranged on the left side and the right side of the shell, each second mounting part comprises a first connecting lug and a second connecting lug, and the first connecting lug is connected with the second connecting lug. The first connecting lug and the second connecting lug extend towards the left side and the right side of the shell respectively. The miniature semiconductor laser diode range finder is high in installation flexibility, can meet various installation requirements, and is wider in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of ranging, in particular to a miniature semiconductor laser diode rangefinder. Background Art

[0002] A laser rangefinder is an instrument that accurately measures the distance to a target using a laser (also known as laser ranging). Laser rangefinders have the advantages of simple operation, high measurement accuracy, long operating distance, strong anti-interference ability, etc., and are widely used in both military and civilian fields. The selection of the laser wavelength commonly used for ranging on the market is generally based on optical characteristics such as strong atmospheric transmittance and eye safety. The laser ranging method features fast measurement speed and long measurement range.

[0003] Nowadays, laser rangefinder technology is constantly progressing, and miniaturization, generalization, high anti-static, and easy installation and adjustment have become the mainstream. The existing installation methods of laser rangefinders are single, and the applicable range is small. In order to make the laser rangefinder meet different miniaturized usage requirements and have a wider applicable range, it is necessary to optimize the layout and structure of the laser rangefinder. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a miniature semiconductor laser diode rangefinder to solve the problem of the single installation method of laser rangefinders in the prior art. The miniature semiconductor laser diode rangefinder of the utility model has high installation flexibility, can meet various installation requirements, and has a wider application range.

[0005] A miniature semiconductor laser diode rangefinder provided by the utility model includes a housing, a laser emission module, and a laser reception module. The laser emission module and the laser reception module are both installed on the housing. A first installation part is provided at the head end of the housing, and second installation parts are provided on the left and right sides of the housing. The second installation parts include a first connecting ear and a second connecting ear, and the first connecting ear and the second connecting ear respectively extend towards the left and right sides of the housing.

[0006] As a preferred solution of the utility model, an oxide film is provided on the installation surfaces of the first connecting ear and the second connecting ear.

[0007] As a preferred solution of the utility model, the housing includes a first installation shell and a second installation shell. The first installation shell is connected to the head end of the second installation shell, and the first connecting ear and the second connecting ear are respectively connected to the left and right sides of the second installation shell.

[0008] As a preferred solution of the utility model, the second installation part is arranged within the range of 1 / 3 at the rear end of the housing.

[0009] As a preferred embodiment of the present utility model, a transmitting channel and a receiving channel are provided inside the housing, and both the transmitting channel and the receiving channel extend from inside the first mounting housing to inside the second mounting housing.

[0010] As a preferred embodiment of the present utility model, the laser emitting module includes a first emitting lens, a second emitting lens, a laser diode, and a laser driver circuit board. The first emitting lens is installed in the transmitting channel at the first mounting housing, the second emitting lens is installed in the transmitting channel at the second mounting housing, the laser driver circuit board is installed on the bottom side of the second mounting housing, and the laser diode is installed on the back side of the second mounting portion corresponding to the transmitting channel and is connected to the laser driver circuit board.

[0011] As a preferred embodiment of the present utility model, the laser receiving module includes a receiving lens, an avalanche diode, and a detector driver circuit board. The receiving lens is installed in the receiving channel at the first mounting housing, the avalanche diode is installed in the receiving channel at the second mounting housing, the avalanche diode is connected to the detector driver circuit board, and the detector driver circuit board is installed on the back side of the second mounting portion and is perpendicular to the laser driver circuit board.

[0012] As a preferred embodiment of the present utility model, it further includes a control and information processing circuit board. Both the detector driver circuit board and the laser driver circuit board are electrically connected to the control and information processing circuit board. The control and information processing circuit board is installed on the upper side of the second mounting portion and is arranged in parallel with the laser driver circuit board.

[0013] Compared with the prior art, the present utility model has the following positive effects:

[0014] The miniature semiconductor laser diode rangefinder provided by the present utility model includes a housing, a laser emitting module, and a laser receiving module. Both the laser emitting module and the laser receiving module are installed on the housing. A first mounting portion is provided at the head end of the housing, and second mounting portions are provided on the left and right sides of the housing. The second mounting portion includes a first connecting ear and a second connecting ear, and the first connecting ear and the second connecting ear respectively extend towards the left and right sides of the housing. In the miniature semiconductor laser diode rangefinder of the present utility model, by simultaneously providing the first mounting portion and the second mounting portion on the housing, both the first mounting portion and the second mounting portion can connect the housing to the outside. For example, the miniature semiconductor laser diode rangefinder can be docked with a host computer through the first mounting portion or the second mounting portion to achieve front-end surface mounting or rear mounting, with high installation flexibility, thereby meeting various installation requirements and making its application range wider. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of the micro semiconductor laser diode rangefinder of the present invention;

[0017] Figure 2 Front view of the micro semiconductor laser diode rangefinder of the present invention;

[0018] Figure 3 is Figure 2 Cross-sectional view of A-A in

[0019] Figure 4 Exploded view of the micro semiconductor laser diode rangefinder of the present invention from the first perspective;

[0020] Figure 5 Exploded view of the micro semiconductor laser diode rangefinder of the present invention from the second perspective;

[0021] Figure 6 Detection schematic diagram of the micro semiconductor laser diode rangefinder of the present invention.

[0022] In the figure: 1. Housing; 11. First mounting part; 12. Second mounting part; 121. First connecting ear; 122. Second connecting ear; 13. Emission channel; 14. Reception channel; 15. First mounting shell; 16. Second mounting shell; 2. Control and information processing circuit board; 21. Inter-board connector; 3. Laser driver circuit board; 4. Detector driver circuit board; 5. Laser diode; 6. Avalanche diode; 7. First emission lens; 8. Second emission lens; 9. Reception lens. Detailed implementation manners

[0023] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The following further elaborates on the specific implementation manners of the present utility model with reference to the drawings.

[0026] Embodiment 1:

[0027] A micro semiconductor laser diode rangefinder provided in this embodiment, as Figures 1-5 shown, includes a housing 1, a laser emission module, and a laser reception module. Both the laser emission module and the laser reception module are installed on the housing 1. The laser emission module is used to emit laser pulses towards the target object, and the laser reception module is used to receive the laser pulses reflected by the target object.

[0028] A first installation portion 11 is provided at the head end of the housing 1. The first installation portion 11 can be an installation hole provided on the end face of the head end of the housing 1. Second installation portions 12 are provided on the left and right sides of the housing 1. The second installation portions 12 include a first connection ear 121 and a second connection ear 122. The first connection ear 121 and the second connection ear 122 respectively extend towards the left and right sides of the housing 1. Installation holes are respectively provided on the first connection ear 121 and the second connection ear 122 for connection with the outside.

[0029] In the micro semiconductor laser diode rangefinder of this embodiment, by simultaneously providing a first mounting portion 11 and a second mounting portion 12 on the housing 1, both the first mounting portion 11 and the second mounting portion 12 can connect the housing to the outside. For example, the micro semiconductor laser diode rangefinder can be docked with a host computer through the first mounting portion 11 or the second mounting portion 12 to achieve front - face mounting or rear - end mounting, thus meeting various mounting requirements and making its application range wider.

[0030] As a preferred embodiment, an oxide film is provided on the mounting surfaces of the first connecting ear 121 and the second connecting ear 122. Preferably, the housing 1 is made of aluminum alloy, and this oxide film is an aluminum oxide film. The oxide film is non - conductive and has an anti - static effect.

[0031] Specifically, conductive oxidation treatment is performed on the mounting surfaces of the first connecting ear 121 and the second connecting ear 122. That is, conductive oxidation (also called chemical oxidation) does not require electricity, only immersion in a chemical solution, which is a pure chemical reaction and is simple and convenient to operate.

[0032] The oxide film on the mounting surfaces of the first connecting ear 121 and the second connecting ear 122 ensures that the rangefinder can be adapted to a variety of host computers, and at the same time, improves the anti - static level of the rangefinder. By conducting the rangefinder and the host computer through the mounting surface, the anti - static ability of the rangefinder is improved. The anti - static ability can reach 4 kV for contact discharge and 6 kV for air discharge.

[0033] As a preferred embodiment, the housing 1 includes a first mounting shell 15 and a second mounting shell 16. The first mounting shell 15 is connected to the head end of the second mounting shell 16. The first connecting ear 121 and the second connecting ear 122 are respectively connected to the left and right sides of the second mounting shell 16. Both the first mounting shell 15 and the second mounting shell 16 are in the shape of a rectangular block, and the area of the connection between the second mounting shell 16 and the first mounting shell 15 is smaller than the area of the back side of the first mounting shell 15. The first mounting shell 15 and the second mounting shell 16 are of an integral structure.

[0034] As a preferred embodiment, the second mounting portion 12 is provided within the range of 1 / 3 of the rear end of the housing 1 to facilitate the connection of the second mounting portion 12 to the outside.

[0035] As a preferred embodiment, a transmitting channel 13 and a receiving channel 14 are provided inside the housing 1. Both the transmitting channel 13 and the receiving channel 14 extend from inside the first mounting shell 15 to inside the second mounting shell 16.

[0036] As Figure 2 and Figure 3 shown, the transmitting channel 13 is provided on the right side of the receiving channel 14. The width of the receiving channel 14 inside the second mounting shell 16 gradually decreases from the end close to the first mounting shell 15 to the end far from the first mounting shell 15.

[0037] As a preferred embodiment, the laser emission module includes a first emission lens 7, a second emission lens 8, a laser diode 5, and a laser driver circuit board 3. The first emission lens 7 is installed in the emission channel 13 at the first mounting shell 15, and the second emission lens 8 is installed in the emission channel 13 at the second mounting shell 16. Both the first emission lens 7 and the second emission lens 8 are fixed to the housing 1 with special glue. In this embodiment, a reasonable emission lens is designed through optical simulation, and at the same time, the structure improves the machining accuracy of the housing according to optical requirements. While ensuring easy installation and adjustment, the laser rangefinder has a smaller divergence angle, thereby reducing the design pressure on the host computer and making it possible to miniaturize the host computer.

[0038] The laser driver circuit board 3 is installed on the bottom side of the second mounting shell 16. The laser diode 5 is installed on the back side of the second mounting portion 12 corresponding to the emission channel 13 and is connected to the laser driver circuit board 3. The laser driver circuit board 3 is fixed to the second mounting shell 16 by screw connection. The laser diode 5 is fixed to the housing with special glue. The receiving antenna lens is fixed to the housing with special glue, and the transmitting antenna lens is fixed to the back side of the second mounting portion 12 with special glue; the laser diode 5 is welded to the welding hole of the laser driver circuit board 3.

[0039] As a preferred embodiment, the laser receiving module includes a receiving lens 9, an avalanche diode 6, and a detector driver circuit board 4. The receiving lens 9 is installed in the receiving channel 14 at the first mounting shell 15, and the avalanche diode 6 is installed in the receiving channel 14 at the second mounting shell 16. The receiving lens 9 is fixed to the housing with special glue. The avalanche diode 6 is used to sense the laser pulse reflected back by the target object. The laser pulse reflected back by the target object can be focused and collimated by the receiving lens 9 before being sensed by the avalanche diode 6.

[0040] The avalanche diode 6 is connected to the detector driver circuit board 4. The detector driver circuit board 4 is installed on the back side of the second mounting portion 12 and is perpendicular to the laser driver circuit board 3. The detector driver circuit board 4 is attached to the back side of the second mounting portion 12 and fixed by screw connection. The detector driver circuit board 4 is installed compactly with the housing, reducing the space occupation.

[0041] The receiving lens 9 and the first emission lens 7 are respectively installed on the left and right sides of the first mounting shell 15. The first mounting portion 11 is arranged on the front side of the first mounting shell 15.

[0042] As a preferred embodiment, the miniature semiconductor laser diode rangefinder of this embodiment further includes a control and information processing circuit board 2. Both the detector drive circuit board 4 and the laser drive circuit board 3 are electrically connected to the control and information processing circuit board 2. The control and information processing circuit board 2 is installed on the upper side of the second mounting portion 12 and is arranged parallel to the laser drive circuit board 3. The control and information processing circuit board 2 is simultaneously installed on the upper sides of the transmitting channel 13 and the receiving channel 14. The control and information processing circuit board 2 is fixedly connected to the housing by screws. The control and information processing circuit board 2 is connected to the laser drive circuit board 3 through an inter-board connector 21; the control circuit assembly is connected to the detector drive circuit board 4 through an inter-board wire.

[0043] The control and information processing circuit board 2 and the laser drive circuit board 3 are provided with grounding resistors to conduct the circuit components to the housing, release static electricity, and improve the anti-static ability of the circuit components.

[0044] When the laser rangefinder starts to measure the distance, the laser diode 5 on the laser drive circuit board 3 spontaneously emits photons, which are irradiated onto the target object through the transmitting lens. The reflected laser is transmitted to the avalanche diode 6 through the receiving lens 9. The avalanche diode 6 receives the laser and converts the optical signal into an electrical signal. This electrical signal is transmitted to the filtering circuit of the detector drive circuit board 4. The filtering circuit filters the electrical signal, and the filtered electrical signal is then transmitted to the signal processor of the control and information processing circuit board 2 for processing and conversion to obtain the distance or angle of the target object.

[0045] As Figure 6 shown is the detection schematic diagram of the miniature semiconductor laser diode rangefinder of this embodiment. Among them, the upper computer is used to send a distance measurement command. The transmitting antenna is the first transmitting lens 7 and the second transmitting lens 8, which are used to project the laser pulse signal emitted by the laser drive circuit board onto the target object. The receiving antenna is the receiving lens 9, which is used to receive the echo laser pulse signal reflected by the target object and converge the echo laser pulse signal onto the detector drive circuit board. The receiving and transmitting drive circuit includes a laser drive circuit and a detector drive circuit.

[0046] The miniature semiconductor laser diode rangefinder of this embodiment emits a laser pulse to the target object to be measured for distance, then receives the laser pulse reflected by the target object, and analyzes and calculates the received laser pulse to obtain the distance between the target object and the laser ranging device.

[0047] The above are only the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can make several deformations and improvements without departing from the creative concept of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A miniature semiconductor laser diode rangefinder, characterized in that: The invention comprises a shell (1), a laser emitting module and a laser receiving module, wherein the laser emitting module and the laser receiving module are both mounted on the shell (1), a first mounting portion (11) is arranged at the head end of the shell (1), and a second mounting portion (12) is arranged on the left and right sides of the shell (1), wherein the second mounting portion (12) comprises a first connecting ear (121) and a second connecting ear (122), and the first connecting ear (121) and the second connecting ear (122) are respectively extended to the left and right sides of the shell (1).

2. A miniature semiconductor laser diode rangefinder according to claim 1, characterized in that: An oxide film is provided on the mounting surfaces of the first connecting ear (121) and the second connecting ear (122).

3. A miniature semiconductor laser diode rangefinder according to claim 1, characterized in that: The housing (1) comprises a first mounting shell (15) and a second mounting shell (16); the first mounting shell (15) is connected to the head end of the second mounting shell (16); and the first connecting ear (121) and the second connecting ear (122) are respectively connected to the left and right sides of the second mounting shell (16).

4. A miniature semiconductor laser diode rangefinder according to claim 1, characterized in that: The second mounting portion (12) is arranged within 1 / 3 of the rear end of the housing (1).

5. The miniature semiconductor laser diode rangefinder according to claim 3, characterized in that: A transmitting channel (13) and a receiving channel (14) are provided in the housing (1); the transmitting channel (13) and the receiving channel (14) both extend from the inside of the first mounting shell (15) to the inside of the second mounting shell (16).

6. A miniature semiconductor laser diode rangefinder according to claim 5, characterized in that: The laser emission module comprises a first emission lens (7), a second emission lens (8), a laser diode (5) and a laser driving circuit board (3); the first emission lens is installed in the emission channel (13) at the first mounting shell (15); the second emission lens (8) is installed in the emission channel (13) at the second mounting shell (16); the laser driving circuit board (3) is installed on the bottom side of the second mounting shell (16); the laser diode (5) is installed on the back side of the second mounting portion (12) corresponding to the emission channel (13) and is connected to the laser driving circuit board (3).

7. A miniature semiconductor laser diode rangefinder according to claim 6, characterized in that: The laser receiving module comprises a receiving lens (9), an avalanche diode (6) and a detector driving circuit board (4); the receiving lens (9) is installed in the receiving channel (14) at the first mounting shell (15); the avalanche diode (6) is installed in the receiving channel (14) at the second mounting shell (16); the avalanche diode (6) is connected to the detector driving circuit board (4); and the detector driving circuit board (4) is installed on the back side of the second mounting portion (12) and is perpendicular to the laser driving circuit board (3).

8. The miniature semiconductor laser diode rangefinder according to claim 7, characterized in that: It also comprises a control and information processing circuit board (2), the detector driving circuit board (4) and the laser driving circuit board (3) are both electrically connected to the control and information processing circuit board (2), and the control and information processing circuit board (2) is mounted on the upper side of the second mounting portion (12) and arranged parallel to the laser driving circuit board (3).

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