Laser sensor measuring instrument

Abstract

The invention relates to the technical field of laser sensor application, in particular to a laser sensor measuring instrument which comprises a detector shell, a controller module and a laser sensor are arranged in the detector shell, a detection hole is formed in one end of the detector shell, an assembly shell is fixed in the laser sensor, and the laser sensor is arranged in the assembly shell. A light tube and a light collecting cover are installed at the front end of the assembly shell, the front end of the light tube extends into the light collecting cover, the rear end of the light tube and the focusing lens are located on the same straight line, and a reflection cavity is formed in the connecting position of the light collecting cover and the front end of the laser sensor; the inclined space is formed by the conical surface of the refractor and the horn surface of the reflection cavity, so that the fed-back light is not easy to completely scatter and is quickly refracted to the detector in the narrow inclined space, the intensity and quality of the detector on a reflected light signal are greatly improved, and the detection quality is improved when a target distance is detected.

Description

Technical Field

[0001] The present invention relates to the technical field of laser sensor applications, and particularly relates to a laser sensor measuring instrument. Background Art

[0002] A laser sensor measuring instrument is a device that uses laser technology for precise measurement and is widely used in industry, scientific research, and daily life. A common type is a laser rangefinder for measuring distance, which is commonly used in construction, surveying, and robot navigation, etc. The principle of laser ranging is mainly based on the measurement of the propagation speed and time of the laser. The light emitted by the laser diode is sent to the target object after being calibrated by multiple lenses, reflected by the target object to the detector, and after being calculated by the controller module, a set of data is obtained and displayed on the display screen of the measuring instrument. Laser ranging is completed by the cooperation of components such as a laser emitter (such as a laser diode), an optical system (lenses, mirrors, collimating mirrors, etc.), a detector, and a controller module (such as a signal processing unit, etc., controlling the laser emission unit, etc.). Among them, the laser emitter, part of the optical system, and the detector are arranged in the laser sensor. Therefore, the laser sensor is the core component of laser ranging, and the laser diode is the core component of the laser sensor.

[0003] During building construction, a strong light environment will have a strong light impact on the light emitted by the laser sensor, resulting in a scattering phenomenon when the light is reflected, which greatly affects the intensity and quality of the reflected light signal detected by the detector. Summary of the Invention

[0004] To solve the above problems, the present invention provides a laser sensor measuring instrument, which includes a detector housing. A controller module and a laser sensor are provided inside the detector housing. One end of the detector housing is provided with a detection hole. An assembly housing is fixed inside the laser sensor. A laser diode, a collimating mirror, and a focusing lens are sequentially installed in the assembly housing from the rear to the front. A light pipe and a light collecting cover are installed at the front end of the assembly housing. The front end of the light pipe extends into the light collecting cover. The rear end of the light pipe is on the same straight line as the focusing lens. A reflection cavity is provided at the connection between the light collecting cover and the front end of the laser sensor. The reflection cavity is in a horn shape and surrounds the periphery of the light pipe. A refracting mirror is installed on the light pipe. The refracting mirror is located inside the reflection cavity. The refracting surface of the refracting mirror is conical. The conical surface of the refracting mirror faces the inner surface of the horn of the reflection cavity. The horn-shaped opening of the reflection cavity gradually becomes larger in the front side direction. The taper of the conical surface of the refracting mirror gradually becomes smaller in the rear side direction. The conical surface of the refracting mirror is parallel to the inner side of the horn surface of the reflection cavity. An optical path channel is left between the horn surface of the reflection cavity and the conical surface of the refracting mirror. The front end of the optical path channel communicates with the light collecting cover. A detector is installed inside the laser sensor. The detector is located beside the assembly housing. The front end of the detector extends into the reflection cavity and faces the conical refracting surface of the refracting mirror. A ring cavity is provided inside the refracting mirror. A transparent liquid is filled in the ring cavity. The transparent liquid can be observed through the conical surface of the refracting mirror.

[0005] As a further preference, a gap is left between the upper and lower sides of the laser sensor and the upper and lower sides of the inner cavity of the detector housing. The controller module is located above the upper gap and away from the laser sensor.

[0006] As a further preference, through holes are provided on the housing of the laser sensor. The upper through hole corresponds to the upper side of the assembly housing, and the lower through hole corresponds to the lower side of the detector.

[0007] As a further preference, a positioning sleeve is fixed at the front end of the assembly housing. The outer surface of the positioning sleeve is fixed at the front end of the laser sensor housing. A positioning plate is fixed at the rear end of the assembly housing. The upper and lower ends of the positioning plate are fixed on the inner wall of the laser sensor housing.

[0008] As a further preference, the light pipe passes forward through the positioning sleeve. The pins of the laser diode pass backward through the positioning plate. A threaded sleeve is installed on the positioning plate. A locking bolt is installed on the threaded sleeve. The inner end of the locking bolt abuts against the rear end of the detector, so that the front end of the detector is fastened on the positioning sleeve. The probe of the detector enters the reflection cavity through the positioning sleeve.

[0009] As a further preference, the annular cavity is arranged in the refractor along a circumferential direction, and the annular cavity corresponds to within a conical surface of the refractor.

[0010] As a further preferred embodiment, a plurality of liquid cooling grooves are provided on the assembly shell, and a miniature liquid cooling module is provided on the laser diode. The plurality of liquid cooling grooves respectively surround the collimating lens, the focusing lens and the laser diode. The miniature liquid cooling module includes a hose. The hose is distributed in each of the liquid cooling grooves in a spiral distribution manner. The front end of the hose enters forward into the reflection cavity, is connected to the refracting mirror and communicates with the annular cavity, so that the transparent liquid is also distributed in the hose. The miniature liquid cooling module also includes a miniature electromagnetic pump installed in the detector housing, and the other end of the hose enters upward into the miniature electromagnetic pump.

[0011] As a further preference, the transparent liquid is deionized water, and at least two of the liquid cooling grooves are located close to the top of the detector body.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The laser diode emits infrared rays after being powered on. The infrared rays are collected by the assembly shell and then directed to the collimator. After being beamed by the collimator, they are directed to the focusing lens. After being focused by the focusing lens, they enter the light tube. After being beamed twice by the light tube, they are directed to the target. After being reflected by the target, they enter the light collecting cover. After being collected by the light collecting cover, they are directed to the reflection cavity through the optical path channel. They are reflected forward by the horn-shaped surface of the reflection cavity to the conical surface of the refractor. They are refracted to the detector by the conical surface of the refractor. The detector sends a signal to the signal processing unit in the controller module according to the refracted light. The signal processing unit obtains the distance data after calculation and displays the data on the display screen of the measuring instrument. The distance measurement is completed. In the present invention, the light emitted by the laser diode to the target is reflected into the light collecting cover, collected into the reflection cavity through the optical path channel, reflected twice onto the conical surface of the refractor through the horn surface of the reflection cavity, and then fed back to the detector after being refracted by the conical surface of the refractor. The optical path channel is narrow, and an oblique space is formed by the conical surface of the refractor and the horn surface of the reflection cavity, so that the fed-back light is not easily scattered completely, but is quickly refracted to the detector in this narrow oblique space, which greatly improves the intensity and quality of the detector's reflected light signal, and improves the detection quality when detecting the target distance.

[0014] 2. An annular cavity is set inside the refractor, and a transparent liquid is filled in the annular cavity. The transparent liquid is deionized water. The transparent liquid is filled in the annular cavity, which assists the refractor to improve the refraction effect, so that the light reflected on the refractor is better refracted to the detector, so that the intensity of the signal received by the detector is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a detector housing of a laser sensor measuring instrument provided in an embodiment of the present invention after being disassembled from front to back;

[0016] Figure 2 A laser sensor measuring instrument provided in an embodiment of the present invention comprises Figure 1 The schematic diagram from the upward perspective is introduced;

[0017] Figure 3 A laser sensor measuring instrument provided in an embodiment of the present invention comprises Figure 2 The schematic diagram of the laser sensor after being cut open is shown;

[0018] Figure 4 A laser sensor measuring instrument provided in an embodiment of the present invention comprises Figure 3 The main view plane diagram is derived;

[0019] Figure 5 A laser sensor measuring instrument provided in an embodiment of the present invention comprises Figure 3 A schematic diagram from another perspective;

[0020] Figure 6 A schematic diagram of the external structure of a laser sensor measuring instrument provided by an embodiment of the present invention when it is closed;

[0021] Figure 7 A laser sensor measuring instrument provided in an embodiment of the present invention comprises Figure 3 An enlarged schematic diagram of part A is shown.

[0022] In the figure: 1. detector housing; 2. controller module; 3. laser sensor; 4. detection hole; 31. assembly shell; 5. laser diode; 6. collimator; 7. focusing lens; 8. light tube; 9. light collecting cover; 10. reflection cavity; 11. refractor; 12. ring cavity; 13. detector; 14. gap; 15. through hole; 16. positioning sleeve; 17. positioning plate; 18. threaded sleeve; 19. locking bolt; 20. hose; 21. micro electromagnetic pump; 22. optical path channel; 23. liquid cooling tank. DETAILED DESCRIPTION

[0023] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0024] In one embodiment, Figures 1-7 As shown:

[0025] This embodiment provides a laser sensor measuring instrument, which includes a detector housing 1. A controller module 2 and a laser sensor 3 are arranged inside the detector housing 1. One end of the detector housing 1 is provided with a detection hole 4. An assembly housing 31 is fixed inside the laser sensor 3. A laser diode 5, a collimating mirror 6 and a focusing lens 7 are sequentially installed in the assembly housing 31 from back to front. A light pipe 8 and a light collecting cover 9 are installed at the front end of the assembly housing 31. The front end of the light pipe 8 extends into the light collecting cover 9. The rear end of the light pipe 8 is on the same straight line as the focusing lens 7. A reflection cavity 10 is provided at the connection between the light collecting cover 9 and the front end of the laser sensor 3. The reflection cavity 10 is trumpet-shaped and surrounds the periphery of the light pipe 8. A refraction mirror 11 is installed on the light pipe 8. The refraction mirror 11 is located inside the reflection cavity 10. The refraction surface of the refraction mirror 11 is conical. The conical surface of the refraction mirror 11 faces the inner surface of the trumpet of the reflection cavity 10. The trumpet-shaped opening of the reflection cavity 10 gradually becomes larger towards the front side direction. The taper of the conical surface of the refraction mirror 11 gradually becomes smaller towards the rear side direction. The conical surface of the refraction mirror 11 is parallel to the inner side of the trumpet surface of the reflection cavity 10. An optical path channel 22 is left between the trumpet surface of the reflection cavity 10 and the conical surface of the refraction mirror 11. The front end of the optical path channel 22 communicates with the light collecting cover 9. A detector 13 is installed inside the laser sensor 3. The laser sensor 3 and the detector 13 are electrically connected to the controller module 2. The detector 13 is located beside the assembly housing 31. The front end of the detector 13 extends into the reflection cavity 10 and faces the conical refraction surface of the refraction mirror 11. A ring cavity 12 is provided inside the refraction mirror 11. A transparent liquid is filled in the ring cavity 12. The transparent liquid can be seen through the conical surface of the refraction mirror 11. The ring cavity 12 is arranged along the circumferential direction inside the refraction mirror 11. The ring cavity 12 corresponds to the inside of the conical surface of the refraction mirror 11.

[0026] As Figure 4 shown, gaps 14 are left between the upper and lower sides of the laser sensor 3 and the upper and lower sides of the inner cavity of the detector housing 1. The controller module 2 is located above the upper gap 14 and away from the laser sensor 3. Through holes 15 are opened on the housing of the laser sensor 3. The upper through hole 15 corresponds to the upper side of the assembly housing 31. The lower through hole 15 corresponds to the lower side of the detector 13. The arrangement of the upper and lower through holes 15 enables the laser sensor 3 to have a certain heat dissipation property, preventing the mirrors from deforming and affecting the direct beam and focusing.

[0027] As Figures 3-5As shown, a positioning sleeve 16 is fixed to the front end of the assembly shell 31, and the outer surface of the positioning sleeve 16 is fixed to the front end of the outer shell of the laser sensor 3. A positioning plate 17 is fixed to the rear end of the assembly shell 31, and the upper and lower ends of the positioning plate 17 are fixed to the inner wall of the outer shell of the laser sensor 3. The light tube 8 after installation passes through the positioning sleeve 16 forward, and the pins of the laser diode 5 after installation pass through the positioning plate 17 backward. A threaded sleeve 18 is installed on the positioning plate 17, and a locking bolt 19 is installed on the threaded sleeve 18, which is convenient for assembly and disassembly. The inner end of the locking bolt 19 is pressed against the rear end of the detector 13, so that the front end of the detector 13 is fastened to the positioning sleeve 16, and the probe of the detector 13 enters the reflection cavity 10 through the positioning sleeve 16, so that the detector 13 and the laser diode 5 are firmly fixed and stable.

[0028] As a further preference, the transparent liquid is deionized water, and there are at least two liquid cooling grooves 23 close to the top of the detector 13 body.

[0029] Principle and effect of use: Press the button on the detector housing 1, and the controller module 2 provides current to the laser diode 5 of the laser sensor 3. The laser diode 5 is powered on to emit infrared rays. The infrared rays are collected by the assembly shell 31 and then directed to the collimator 6. After being beamed by the collimator 6, they are directed to the focusing lens 7. After being focused by the focusing lens 7, they enter the light tube 8. After being beamed twice by the light tube 8, they are directed to the target. After being reflected by the target, they enter the light collecting cover 9. After being collected by the light collecting cover 9, they are directed into the reflection cavity 10 through the optical path channel 22. They are reflected forward by the horn-shaped surface of the reflection cavity 10 to the conical surface of the refractor 11. They are refracted to the detector 13 through the conical surface of the refractor 11. The detector 13 sends a signal to the signal processing unit in the controller module 2 according to the refracted light. The signal processing unit obtains the distance data after calculation and displays the data on the display screen of the measuring instrument. The distance measurement is completed. In the present invention, the light emitted by the laser diode 5 to the target is reflected into the light collecting cover 9, collected into the reflection cavity 10 through the optical path channel 22, and reflected again onto the conical surface of the refractor 11 through the horn surface of the reflection cavity 10, and then fed back to the detector 13 after being refracted by the conical surface of the refractor 11. The optical path channel 22 is narrow, and an oblique space is formed by the conical surface of the refractor 11 and the horn surface of the reflection cavity 10, so that the fed-back light is not easily scattered completely, but is quickly refracted to the detector 13 in this narrow oblique space, which greatly improves the intensity and quality of the reflected light signal of the detector 13, and improves the detection quality when detecting the target distance.

[0030] like Figures 3-5As shown, a ring cavity 12 is provided inside the refractive mirror 11. A transparent liquid is filled in the ring cavity 12. The transparent liquid is deionized water or other transparent coolant media, etc. The transparent liquid is filled in the ring cavity 12, which helps the refractive mirror 11 improve the refraction effect, making the light reflected onto the refractive mirror 11 refract better towards the detector 13, and further improving the intensity of the signal received by the detector 13.

[0031] As Figure 1 , Figure 3 shown, multiple liquid cooling grooves 23 are provided on the assembly shell 31. A micro liquid cooling module is provided on the laser diode 5. The multiple liquid cooling grooves 23 respectively surround the collimating mirror 6, the focusing lens 7, and the laser diode 5. The micro liquid cooling module includes a hose 20, and the hose 20 is distributed in each liquid cooling groove 23 in a spiral distribution manner. The front end of the hose 20 extends forward into the reflection cavity 10 to be connected to the refractive mirror 11 and communicate with the ring cavity 12, so that the transparent liquid is also distributed in the hose 20. The micro liquid cooling module further includes a micro electromagnetic pump 21 installed in the detector housing 1, and the other end of the hose 20 extends upward into the micro electromagnetic pump 21. During operation, the micro electromagnetic pump 21 is controlled by the controller module 2 to be powered on and work, sending the cooled transparent liquid into the hose 20. The transparent liquid then enters the ring cavity 12 of the refractive mirror 11 through the hose 20, and then flows back to the micro electromagnetic pump 21 through another tube on the refractive mirror 11 to achieve circulation. Therefore, the transparent liquid in the ring cavity 12 is not stationary, but circulates with the micro electromagnetic pump 21 and the hose 20. In addition to assisting the refractive mirror 11 to quickly and high-quality provide optical signals to the detector 13, the transparent liquid also cools each liquid cooling groove 23 through its circulating fluidity. Since the liquid cooling grooves 23 are provided on the assembly shell 31 and the laser diode 5 is an easily heat-generating component, the heat generated in the assembly shell 31 when the laser diode 5 emits light is carried away by the transparent liquid. After being dissipated by the heat sink on the micro electromagnetic pump 21 (the heat sink is a prior art and is installed on the micro electromagnetic pump 21, and the micro electromagnetic pump 21 itself has this automatic heat dissipation function, so it will not be elaborated here), it is sent back to the liquid cooling grooves 23 through the hose 20 to repeat the cooling, which not only ensures that the transparent liquid still plays an auxiliary refraction role in the ring cavity 12, but also ensures that the transparent liquid cools the heat on the assembly shell 31, avoiding deformation of the collimating mirror 6 and the focusing lens 7 and ensuring that the optical signal is not affected by temperature. The setting of the liquid cooling grooves 23 makes the part of the hose 20 on the assembly shell 31 close to the laser diode 5, the collimating mirror 6, and the focusing lens 7, and the heat generated when they work is better released.

[0032] The above orientation references do not represent the specific orientations of the components in this embodiment. This embodiment is only for the convenience of describing the solution and is set with relative descriptions with reference to the orientations in the figure. In essence, the specific orientations of the components are based on their actual installation, actual use, and the habitual orientation descriptions of those skilled in the art. This is hereby stated.

[0033] The specific embodiments described above further elaborate on the object of the invention, the technical solutions, and the beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser sensor measuring instrument, characterized in that: The invention comprises a detector housing (1), wherein a controller module (2) and a laser sensor (3) are arranged in the detector housing (1), a detection hole (4) is arranged at one end of the detector housing (1), an assembly shell (31) is fixed inside the laser sensor (3), a laser diode (5), a collimator (6) and a focusing lens (7) are arranged in sequence from back to front in the assembly shell (31), a light tube (8) and a light collecting cover (9) are arranged at the front end of the assembly shell (31), and the light tube (8) and a light collecting cover (9) are arranged at the front end of the assembly shell (31). The front end of the light tube (8) extends into the light collecting cover (9), the rear end of the light tube (8) and the focusing lens (7) are in the same straight line, a reflection cavity (10) is provided at the connection between the light collecting cover (9) and the front end of the laser sensor (3), the reflection cavity (10) is trumpet-shaped and surrounds the outer periphery of the light tube (8), a refractor (11) is installed on the light tube (8), the refractor (11) is located on the inner side of the reflection cavity (10), and the refraction of the refractor (11) is The surface of the refractor (11) is conical, the conical surface of the refractor (11) faces the inner surface of the horn of the reflection cavity (10), the horn-shaped opening of the reflection cavity (10) gradually increases toward the front side, and the taper of the conical surface of the refractor (11) gradually decreases toward the rear side. The conical surface of the refractor (11) is parallel to the inner side of the horn surface of the reflection cavity (10), and an optical path channel (12) is left between the horn surface of the reflection cavity (10) and the conical surface of the refractor (11), and the optical path channel (12) The front end of the laser sensor (3) is connected to the light collecting cover (9), a detector (13) is installed in the laser sensor (3), the detector (13) is located beside the assembly shell (31), the front end of the detector (13) extends into the reflection cavity (10) and faces the conical refractive surface of the refractor (11), the refractor (11) is provided with an annular cavity (12), the annular cavity (12) is filled with a transparent liquid, and the transparent liquid can be observed through the conical surface of the refractor (11).

2. A laser sensor measuring instrument according to claim 1, characterized in that: A gap (14) is left between the upper and lower sides of the laser sensor (3) and the upper and lower sides of the inner cavity of the detector housing (1), and the controller module (2) is located above the gap (14) on the upper side and away from the laser sensor (3).

3. A laser sensor measuring instrument according to claim 2, characterized in that: A through hole (15) is opened on the outer shell of the laser sensor (3), the through hole (15) on the upper side corresponds to the upper side of the assembly shell (31), and the through hole (15) on the lower side corresponds to the lower side of the detector (13).

4. A laser sensor measuring instrument according to claim 3, characterized in that: A positioning sleeve (16) is fixed to the front end of the assembly shell (31), the outer surface of the positioning sleeve (16) is fixed to the front end of the outer shell of the laser sensor (3), and a positioning plate (17) is fixed to the rear end of the assembly shell (31), the upper and lower ends of the positioning plate (17) are fixed to the inner wall of the outer shell of the laser sensor (3).

5. A laser sensor measuring instrument according to claim 4, characterized in that: The light tube (8) passes through the positioning sleeve (16) forward, and the pin of the laser diode (5) passes through the positioning plate (17) backward. A threaded sleeve (18) is installed on the positioning plate (17), and a locking bolt (19) is installed on the threaded sleeve (18). The inner end of the locking bolt (19) is pressed against the rear end of the detector (13), so that the front end of the detector (13) is fastened to the positioning sleeve (16), and the probe of the detector (13) enters the reflection cavity (10) through the positioning sleeve (16).

6. A laser sensor measuring instrument according to claim 5, characterized in that: The annular cavity (12) is arranged in the refractor (11) along the circumferential direction, and the annular cavity (12) corresponds to the inside of the conical surface of the refractor (11).

7. A laser sensor measuring instrument according to claim 6, characterized in that: The assembly shell (31) is provided with a plurality of liquid cooling grooves (23), and the laser diode (5) is provided with a micro liquid cooling module. The plurality of liquid cooling grooves (23) surround the collimator (6), the focusing lens (7) and the laser diode (5) respectively. The micro liquid cooling module comprises a hose (20). The hose (20) is distributed in each of the liquid cooling grooves (23) in a spiral distribution manner. The front end of the hose (20) enters forward into the reflection cavity (10), is connected to the refractor (11) and communicates with the annular cavity (12), so that the transparent liquid is also distributed in the hose (20). The micro liquid cooling module also comprises a micro electromagnetic pump (21) installed in the detector housing (1), and the other end of the hose (20) enters upward into the micro electromagnetic pump (21).

8. The laser sensor measuring instrument according to claim 7, characterized in that: The transparent liquid is deionized water, and there are at least two liquid cooling grooves (23) located close to the top of the detector (13) body.

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