Point laser distance measuring sensor

Abstract

The utility model discloses a point laser distance measuring sensor, comprising a housing provided with a first cavity and a second cavity; the emitting light path comprises a laser, a first lens and a second lens, the laser is arranged at the rear end of the first cavity of the shell, and the first lens and the second lens are arranged at the front end of the first cavity of the shell; the receiving light path comprises a sensor plate and a third lens, a power supply pin header at the tail end of the laser is welded on the sensor plate, and the third lens is arranged in the second cavity of the shell; the hardware circuit comprises a first circuit board, a second circuit board, a third circuit board and a fourth circuit board and is used for power supply, acquisition and data processing; according to the utility model, small-size long-distance measurement is realized through the two lenses with large magnifying power, and the size of the lenses is smaller on the premise that the performance is met; through a compact layout mode, a hardware circuit is divided into four circuit boards which are distributed on the periphery of a structural member, so that the minimum layout of equipment is realized.

Description

Technical Field

[0001] This utility model relates to the field of laser sensor technology, and in particular to a point laser ranging sensor. Background Technology

[0002] A Direct-to-Flight (DTOF) laser rangefinder is a sensor that measures distance by measuring the time interval between transmitted and received pulses. It mainly consists of a transmitting optical path, a receiving optical path, a VCSEL (Variable Cathode Laser Separator), a single-photon avalanche photodiode (SPAD), and a time-to-digital converter (TDC). The DTOF emits and receives N light signals within a single frame measurement time. A histogram is then plotted on the recorded N flight times, and the flight time (tof) with the highest frequency is used to calculate the target distance.

[0003] Laser rangefinders, with their simple and compact structure, are widely used in 3C electronics, security inspection, and artificial intelligence applications, such as robotic vacuum cleaners, factory safety distance detection, mobile phone ranging, drone stabilization and collision detection, and aiming scopes. However, most common laser rangefinders on the market are used for short-distance measurements. Products used for long-distance ranging, such as drones and aiming scopes, are often large and expensive. Laser rangefinders for long distances often require both transmitting and receiving optical paths to achieve accurate measurements. The presence of these optical paths increases size, makes optical path calibration more complex, and increases costs. Utility Model Content

[0004] The main objective of this invention is to provide a point laser ranging sensor, which aims to solve existing technical problems.

[0005] To achieve the above objectives, this utility model provides a point laser ranging sensor, comprising:

[0006] A housing having a first cavity and a second cavity;

[0007] The optical emission path includes a laser, a first lens, and a second lens. The laser is located at the rear end of the first cavity of the housing, and the first and second lenses are located at the front end of the first cavity of the housing.

[0008] The optical receiving path includes a sensor board and a third lens. The power supply pins at the end of the laser are soldered to the sensor board, and the third lens is located in the second cavity of the housing.

[0009] The hardware circuitry includes a first circuit board, a second circuit board, a third circuit board, and a fourth circuit board, which are used for power supply, data acquisition, and data processing.

[0010] Furthermore, the solder joints of the first circuit board and the bottom plate of the second circuit board are soldered together by wires, the solder joints of the upper part of the second circuit board are soldered together to one side of the third circuit board, and the solder joints of the other side of the third circuit board are soldered together to the fourth circuit board.

[0011] Furthermore, the first circuit board is disposed on the first side of the housing, the third circuit board is disposed on the second side of the housing, and the second circuit board and the third circuit board are disposed on the side of the first circuit board away from the housing.

[0012] Furthermore, the first circuit board and the third circuit board have mounting ports adapted to connect the second circuit board and the fourth circuit board, and the ends of the first circuit board, the second circuit board, the third circuit board and the fourth circuit board away from the housing are flush with each other.

[0013] Furthermore, both the first circuit board and the third circuit board are connected to the housing by screws.

[0014] Furthermore, the first circuit board and the third circuit board have mounting ports adapted to connect the sensor board.

[0015] Furthermore, the first lens and the second lens are arranged collinearly at a distance within the first cavity of the housing.

[0016] Furthermore, the second lens is arranged collinearly with the laser.

[0017] Furthermore,

[0018] The beneficial effects of this utility model are reflected in:

[0019] This invention achieves small-sized, long-distance measurements using two high-magnification lenses, while maintaining performance requirements and resulting in smaller lens sizes.

[0020] This invention achieves a minimized device layout by dividing the hardware circuit into four circuit boards distributed around the structural components through a compact layout. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the point laser ranging sensor structure of this utility model;

[0022] Figure 2 This utility model Figure 1 Schematic diagram of structural explosion.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Housing; 2. Laser; 3. First lens; 4. Second lens; 5. Sensor board; 6. Third lens; 7. First circuit board; 8. Second circuit board; 9. Third circuit board; 10. Fourth circuit board. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0026] Please see Figure 1 and Figure 2 This utility model provides a point laser ranging sensor, comprising:

[0027] The housing 1 has a first cavity and a second cavity;

[0028] The emitting optical path includes a laser 2, a first lens 3, and a second lens 4. The laser 2 is located at the rear end of the first cavity of the housing 1 and is fixed with adhesive after adjustment. The first lens 3 and the second lens 4 are located at the front end of the first cavity of the housing 1 and are fixed with adhesive after adjustment by optical instruments. The laser 2 provides small-angle active measurement light for the device. Through the focusing modulation of the emitting optical path 2 / 3, the light is irradiated onto the object under test. After the light emitted by the laser 2 is focused and collimated by the emitting optical path, it forms a small-angle light spot within the range of the measured distance.

[0029] The receiving optical path is used to focus the measurement signal reflected from the outside onto the 11 sensor board. The 11 sensor receives the measurement signal and feeds the signal back to the system. The receiving optical path includes the sensor board 5 and the third lens 6. The power supply pins at the end of the laser 2 are soldered to the sensor board 5. After the transmitting and receiving optical paths are calibrated, the sensor board 5 is fixed with glue after the position is adjusted so that the optical center is aligned with the target surface of the sensor detector. The third lens 6 is located in the second cavity of the housing 1 and is fixed with glue after calibration by optical instruments.

[0030] The hardware circuit includes a first circuit board 7, a second circuit board 8, a third circuit board 9, and a fourth circuit board 10, which are used for power supply, data acquisition, and data processing.

[0031] This invention achieves small-sized, long-distance measurements using two high-magnification lenses, while maintaining performance requirements and resulting in smaller lens sizes.

[0032] Specifically, the solder joints of the first circuit board 7 and the bottom plate of the second circuit board 8 are soldered together by wires, the upper solder joints of the second circuit board 8 are soldered together to one side of the third circuit board 9, and the other side of the third circuit board 9 is soldered together to the solder joints of the fourth circuit board 10.

[0033] Specifically, the first circuit board 7 is located on the first side of the housing 1, the third circuit board 9 is located on the second side of the housing 1, and the second circuit board 8 and the third circuit board 9 are located on the side of the first circuit board 7 away from the housing 1.

[0034] Specifically, the first circuit board 7 and the third circuit board 9 have mounting ports for connecting the second circuit board 8 and the fourth circuit board 10, and the ends of the first circuit board 7, the second circuit board 8, the third circuit board 9 and the fourth circuit board 10 away from the housing 1 are flush with each other.

[0035] This invention achieves a minimized device layout by dividing the hardware circuit into four circuit boards distributed around the structural components through a compact layout.

[0036] Specifically, the first lens 3 and the second lens 4 are arranged collinearly at a distance from each other within the first cavity of the housing 1.

[0037] Specifically, the second lens 4 is arranged collinearly with the laser 2.

[0038] In one embodiment, the first circuit board 7 and the third circuit board 9 have mounting ports for connecting the sensor board 5.

[0039] In this embodiment, the mounting port is designed to facilitate a more compact installation of the first circuit board 7, the second circuit board 8, the third circuit board 9, and the fourth circuit board 10, thereby achieving a minimized layout of the device.

[0040] In one embodiment, both the first circuit board 7 and the third circuit board 9 are connected to the housing 1 by screws. This arrangement facilitates the disassembly and maintenance of the circuit boards.

[0041] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A point laser ranging sensor, characterized by , comprising: a shell (1) having a first cavity and a second cavity; a transmitting light path comprising a laser (2), a first lens (3) and a second lens (4), the laser (2) being arranged at the rear end of the first cavity of the shell (1), the first lens (3) and the second lens (4) being arranged at the front end of the first cavity of the shell (1); a receiving light path comprising a sensor board (5) and a third lens (6), the power supply pin at the end of the laser (2) being welded on the sensor board (5), the third lens (6) being arranged in the second cavity of the shell (1); a hardware circuit comprising a first circuit board (7), a second circuit board (8), a third circuit board (9) and a fourth circuit board (10) for power supply, collection and data processing.

2. A point laser ranging sensor as claimed in claim 1, characterized in that: The first circuit board (7) is welded by a wire at the welding point of the bottom plate of the second circuit board (8), the upper welding point of the second circuit board (8) is welded with one side of the third circuit board (9), and the other side of the third circuit board (9) is welded with the welding point of the fourth circuit board (10).

3. A point laser ranging sensor as claimed in claim 2, characterized in that: The first circuit board (7) is arranged on the first side of the shell (1), the third circuit board (9) is arranged on the second side of the shell (1), and the second circuit board (8) and the third circuit board (9) are arranged on the side of the first circuit board (7) away from the shell (1).

4. A point laser ranging sensor as claimed in claim 2, wherein: The first circuit board (7) and the third circuit board (9) have mounting ports adapted to connect the second circuit board (8) and the fourth circuit board (10), and the first circuit board (7), the second circuit board (8), the third circuit board (9) and the fourth circuit board (10) are flush with each other at the end away from the shell (1).

5. A point laser ranging sensor as in claim 1, wherein: The first circuit board (7) and the third circuit board (9) are connected with the shell (1) by screws.

6. A point laser ranging sensor as in claim 1, wherein: The first circuit board (7) and the third circuit board (9) have mounting ports adapted to connect the sensor board (5).

7. A point laser ranging sensor as in claim 1, wherein: The first lens (3) and the second lens (4) are arranged in the first cavity of the shell (1) in a spaced collinear manner.

8. A point laser ranging sensor as in claim 1, wherein: The second lens (4) is arranged in a spaced collinear manner with the laser (2).

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