CN117970351B - Laser ranging sensor - Google Patents

Abstract

The application relates to a laser ranging sensor. The laser ranging sensor includes: the shell is internally provided with a containing cavity, an air inlet hole and a light hole are formed in the shell, and an air guide wall is also formed on the shell; the laser component is arranged in the accommodating cavity and is used for transmitting and receiving laser beams; the light transmission piece is covered at the light transmission hole and used for transmitting laser beams, and an air outlet hole which is opposite to the air guide wall is formed in the light transmission piece; the dust removing assembly is arranged in the accommodating cavity; the external air flow sequentially flows through the air inlet hole under the driving of the dust removing component, and after the accommodating cavity and the air outlet hole, the air guide wall is impacted to turn, and the light transmitting piece is subjected to dust removal and then flows out. The laser ranging sensor provided by the application can automatically remove dust and improve the dust removal efficiency.

Description

Laser ranging sensor

Technical Field

The application relates to the technical field of distance measurement, in particular to a laser ranging sensor.

Background

With the development of distance measurement technology, laser distance measurement sensors are widely used in various industries due to their precise and rapid distance measurement function. The traditional laser ranging sensor is exposed in the external environment for a long time, so that the light transmittance of a light transmitting part of the laser ranging sensor is easy to be reduced due to accumulation of dust, the measuring precision of a product is further affected, and even the measuring function is completely lost, so that the light transmitting part needs to be dedusted regularly.

In the related art, generally adopt the manual work to remove dust to printing opacity spare, this kind of dust removal mode inefficiency and not intelligent enough, user's experience degree is relatively poor.

Disclosure of Invention

In view of the above, it is necessary to provide a laser ranging sensor capable of automatically removing dust and improving dust removal efficiency.

A laser ranging sensor, the laser ranging sensor comprising:

The shell is internally provided with a containing cavity, an air inlet hole and a light hole are formed in the shell, and an air guide wall is also formed on the shell;

the laser component is arranged in the accommodating cavity and is used for transmitting and receiving laser beams;

The light transmission piece is covered at the light transmission hole and used for transmitting laser beams, and an air outlet hole which is opposite to the air guide wall is formed in the light transmission piece; and

The dust removing component is arranged in the accommodating cavity;

The external air flow sequentially flows through the air inlet hole under the driving of the dust removing component, and after the accommodating cavity and the air outlet hole, the air guide wall is impacted to turn, and the light transmitting piece is subjected to dust removal and then flows out.

In some embodiments, the dust removal assembly includes a fan and a dust removal controller electrically connected between the fan and the laser assembly;

condition one: the actual amplitude of the laser beam received by the laser component is smaller than or equal to a preset amplitude;

condition II: the actual temperature in the accommodating cavity is larger than a preset temperature threshold;

The dust removal controller is used for controlling the fan to start when at least one of the first condition and the second condition is met.

In some embodiments, the dust removing assembly further comprises a temperature detecting member, wherein the temperature detecting member is electrically connected with the dust removing controller, and the temperature detecting member is used for detecting the actual temperature in the accommodating cavity and feeding back to the dust removing controller.

In some embodiments, the dust removal device further comprises an adjusting assembly, wherein the adjusting assembly is arranged on the shell and is electrically connected with the dust removal controller;

The dust removal controller is used for controlling the fan to work at a first output power and/or controlling the adjusting component to adjust the opening of the air inlet hole and the air outlet hole when the actual amplitude of the laser beam received by the laser component is smaller than or equal to the adjusting amplitude;

the dust removal controller is also used for controlling the fan to work with second output power and/or controlling the adjusting component to adjust the opening of the air inlet hole and the air outlet hole when the actual amplitude of the laser beam received by the laser component is larger than the adjusting amplitude but smaller than or equal to the preset amplitude;

The adjustment amplitude is smaller than the preset amplitude, and the first output power is larger than the second output power.

In some embodiments, the housing is configured with a dust guiding wall, the dust guiding wall is disposed downstream of the light-transmitting member along a dust removing direction of the airflow and is disposed obliquely downward in the dust removing direction, and the dust guiding wall is used for guiding dust to fall.

In some embodiments, the outer surface of the light-transmitting member facing away from the accommodating cavity is further covered with a slip-enhancing coating for increasing the surface smoothness.

In some embodiments, the air conditioner further comprises a water-blocking air-passing component, wherein the water-blocking air-passing component comprises a first water-blocking air-passing piece and a second water-blocking air-passing piece, the first water-blocking air-passing piece covers the air inlet hole, and the second water-blocking air-passing piece covers the air outlet hole.

In some embodiments, the water-blocking gas-passing assembly further comprises a first pressure plate for detachably pressing the first water-blocking gas-passing member against the housing, and a second pressure plate for detachably pressing the second water-blocking gas-passing member against the housing.

In some embodiments, the water-blocking overair assembly is disposed within the containment cavity.

In some embodiments, the laser emitting assembly comprises a laser emitting unit and a laser receiving unit;

The laser emitting unit is used for emitting laser beams outwards, and the laser receiving unit is used for receiving the reflected laser beams.

Above-mentioned laser rangefinder sensor through setting up dust removal subassembly, when the printing opacity piece exists the laying dust and influences the luminousness, and dust removal subassembly starts and drives external air current blow off the surface of printing opacity piece to the surface to the printing opacity piece removes dust. Compared with manual operation, the mode is convenient to operate, high in efficiency, intelligent and humanized, and therefore user experience is improved.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a laser ranging sensor according to an embodiment of the application.

Fig. 2 is a top view of the laser ranging sensor shown in fig. 1 with a cover removed.

Fig. 3 is a schematic structural diagram of the laser ranging sensor shown in fig. 2 with the mounting base and the second pressing plate removed.

Fig. 4 is a schematic view of another view angle of the laser ranging sensor shown in fig. 3.

Fig. 5 is a schematic structural view of a further view angle of the laser ranging sensor shown in fig. 3.

Fig. 6 is a schematic view of the laser ranging sensor shown in fig. 3 with the first platen removed.

Fig. 7 is a schematic view of the laser ranging sensor shown in fig. 6 with the light-transmitting member removed.

Reference numerals:

1. A laser ranging sensor;

10. A housing; 20. a laser assembly; 30. a dust removal assembly; 40. a light transmitting member; 50. a water-blocking overair assembly; 60. a metal heat sink; 70. a mounting base;

11. a housing; 12. a cover body; 13. a receiving chamber; 14. an air inlet hole; 15. a light hole; 16. an air guide wall; 17. a dust guide wall; 18. a mounting port;

21. A laser emitter; 22. a laser emission controller; 23. a laser receiving controller;

31. a blower; 32. a dust removal controller;

41. an air outlet hole;

51. a first water-blocking gas-passing member; 52. a second water-blocking gas-passing member; 53. a first platen; 54. and a second pressing plate.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level greater than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or merely represents a high degree of dusting of the first feature by the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, 4, 5,6 and 7, the present application provides a laser ranging sensor 1 for laser ranging. The laser ranging sensor 1 comprises a shell 10, a laser component 20, a light-transmitting piece 40 and a dust removing component 30. The housing 10 has a receiving chamber 13, an air inlet 14 and a light hole 15 are formed in the housing 10, and the housing 10 is further configured with an air guide wall 16. The laser assembly 20 is disposed in the receiving chamber 13 and is used to emit and receive a laser beam. The light-transmitting member 40 covers the light-transmitting hole 15 and is used for transmitting the laser beam, and the light-transmitting member 40 is provided with an air outlet hole 41 which is opposite to the air guide wall 16. The dust removal assembly 30 is disposed within the receiving chamber 13. The external air flows through the air inlet 14, the accommodating cavity 13 and the air outlet 41 in sequence under the driving of the dust removing component 30, then impacts the air guide wall 16 to turn, and removes dust from the transparent member 40 and flows out.

The housing 10 serves for mounting and housing. The housing 10 may be rectangular, cylindrical or otherwise shaped, and may be specifically configured as desired. Generally, the housing 10 is made of a metal material, which has better mechanical strength and good heat dissipation performance, so as to be convenient for maintaining the normal operation of the laser ranging sensor 1.

Specifically, the housing 10 further includes a casing 11 and a cover 12, two opposite end surfaces of the casing 11 along the length direction are respectively provided with an air inlet hole 14 and a light hole 15, a top side of the casing 11 is provided with a mounting opening 18, and the laser component 20 and the dust removal component 30 are all mounted in the casing 11 through the mounting opening 18. The cover 12 is detachably covered at the mounting opening 18 to close the mounting opening 18 and define the accommodating cavity 13 with the housing 11. In addition, the cover 12 extends in the extending direction of the housing 11, and a section of the end surface of the cover protruding out of the housing 11 where the light holes 15 are formed is bent in the direction toward the housing 11 and configured to form the air guide wall 16.

Preferably, the air intake holes 14 are plural and are arranged in the width direction of the housing 11.

Referring to fig. 2, 3 and 4 together, and referring to fig. 5, the laser assembly 20 includes a laser emitting unit for emitting a laser beam outwards and a laser receiving unit for receiving the reflected laser beam.

Specifically, the laser emission unit includes a laser emission controller 22 and a laser emitter 21, the laser emission controller 22 being electrically connected to the laser emitter 21, the laser emission controller 22 controlling the laser emitter 21 to emit a laser beam. The laser receiving unit includes a laser receiving controller 23 and a laser receiver, the laser receiving controller 23 is electrically connected with the laser receiver, and the laser receiver receives the laser beam reflected by the outside and feeds back to the laser receiving controller 23.

The laser assembly 20 is a conventional technology in the art, so the specific working principle thereof will not be described in detail herein.

In order to improve the heat dissipation performance, the laser ranging sensor 1 may further include a mounting seat 70 and a metal heat dissipation member 60, wherein the mounting seat 70 and the metal heat dissipation member 60 are both located in the accommodating cavity 13, and the metal heat dissipation member 60, the laser assembly 20 and the dust removal assembly 30 are all mounted on the mounting seat 70. The metal heat sink 60 is connected between the laser assembly 20 and the housing 10 to conduct heat generated by the operation of the laser assembly 20 to the outside through the housing 10.

The light-transmitting member 40 may be made of transparent material such as glass or plastic. Preferably, glass is adopted, so that the glass has high transparency, is not easy to age, and has long service life.

Preferably, the plurality of air outlet holes 41 are arranged along the width direction of the housing 11 on the light transmitting member 40. The air guide wall 16 is opposite to all the air outlet holes 41 and is used for shielding all the air outlet holes 41 so as to improve the aesthetic property of the laser ranging sensor 1.

The laser beam emitted from the laser emitter 21 is emitted to the outside through the light-transmitting member 40, and is reflected after encountering an obstacle, and is returned to the accommodating chamber 13 of the housing 10 through the light-transmitting member 40, and is received by the laser receiver.

The dust removal assembly 30 is arranged in the accommodating cavity 13, so that the probability of contact between the dust removal assembly 30 and the illumination and water vapor can be reduced, and the service life can be prolonged. The dust removing assembly 30 may be an assembly including a blower 31, an air pump, and the like.

The dust extraction assembly 30 is used to provide a driving force for airflow. When the dust removing assembly 30 works, external air flows in from the air inlet hole 14 and flows out of the shell 10 through the accommodating cavity 13 and the air outlet hole 41. Thereafter, the air flow hits the air guide wall 16 and turns and blows toward the outer surface of the dust removing member facing away from the accommodating chamber 13 to perform dust removal on the outer surface.

In general, the laser ranging sensor 1 is easily contaminated with dust on the outer surface of the light-transmitting member 40 due to long-term exposure to the external environment. When dust accumulates to a certain extent, the light transmittance of the light transmitting member 40 is affected, and thus the measurement accuracy of the product is reduced, and even the measurement function is completely lost, so that the light transmitting member 40 needs to be removed periodically. Traditional dust removal mode is for adopting the manual work to clear away the laying dust, and this kind of dust removal mode inefficiency just is intelligent inadequately, and user's experience degree is relatively poor.

In the present application, by arranging the dust removing assembly 30, when the light transmitting member 40 has dust accumulation and affects light transmittance, the dust removing assembly 30 is started and drives external air flow to blow the outer surface of the light transmitting member 40, and removes dust on the outer surface of the light transmitting member 40. Compared with manual operation, the mode is convenient to operate, high in efficiency, intelligent and humanized, and therefore user experience is improved.

Referring to fig. 4 again, in some embodiments, the dust removing assembly 30 includes a fan 31 and a dust removing controller 32, and the dust removing controller 32 is electrically connected between the fan 31 and the laser assembly 20; condition one: the actual amplitude of the laser beam received by the laser assembly 20 is less than or equal to the preset amplitude; condition II: the actual temperature in the accommodation chamber 13 is greater than a preset temperature threshold; the dust removal controller 32 is configured to control the fan 31 to be started when at least one of the first and second conditions is satisfied.

As an example, the dust removing controller 32, the laser emission controller 22 and the laser receiving controller 23 are all PCB boards with control functions, the fan 31 is directly assembled on the dust removing controller 32, the laser emitter 21 is directly assembled on the laser emission controller 22, and the laser receiver is directly assembled on the laser receiving controller 23, so as to improve the compactness of the layout in the accommodating cavity 13 and reduce the volume of the laser ranging sensor 1.

The preset amplitude value can be selected according to the actual ranging requirement. For example, the preset amplitude is the amplitude of the laser beam received by the laser ranging sensor 1 at the initial farthest ranging distance, and the amplitude characterizes the intensity of the laser beam received by the laser beam at the initial farthest ranging distance. Initially, the light-transmitting member 40 is almost free of dust.

The more dust is deposited on the light-transmitting member 40, the smaller the light transmittance, the lower the intensity of the laser beam that the laser receiver can receive, and the smaller the actual amplitude.

The laser receiving controller 23 judges whether the actual amplitude of the laser beam received by the laser receiver is smaller than the preset amplitude according to the information fed back by the laser receiver, if yes, the laser receiving controller 23 sends a starting signal to the dust removing controller 32, so that the dust removing controller 32 controls the fan 31 to start so as to remove dust from the transparent member 40.

The preset temperature threshold may be selected based on actual ranging requirements. For example, the preset temperature threshold is a temperature value that may cause the components within the accommodation chamber 13 to fail to function properly.

When the actual temperature in the accommodating cavity 13 is greater than the preset temperature threshold, the dust removal controller 32 also controls the fan 31 to start, so that heat exchange between the outside and the accommodating cavity 13 can be realized, the heat dissipation performance is improved, and the purposes of improving the ranging precision and the product performance of the laser ranging sensor 1 are realized.

It should be noted that, when at least one condition of the actual amplitude of the laser beam received by the laser assembly 20 being less than or equal to the preset amplitude and the actual temperature in the accommodating chamber 13 being greater than the preset temperature threshold is satisfied, the blower 31 is started to simultaneously perform dust removal and heat dissipation, and when two conditions of the actual amplitude of the laser beam received by the laser assembly 20 being greater than the preset amplitude and the actual temperature in the accommodating chamber 13 being less than or equal to the preset temperature threshold are satisfied simultaneously, the blower 31 is turned off.

Through designing fan 31 and dust removal controller 32, and dust removal controller 32 electricity is connected between fan 31 and laser subassembly 20, can remove dust automatically, and laser rangefinder sensor 1's use is more humanized.

In some embodiments of the present application, the dust removing assembly 30 further includes a temperature detecting member electrically connected to the dust removing controller 32, the temperature detecting member being used to detect the actual temperature in the accommodating chamber 13 and feed back to the dust removing controller 32.

For example, the temperature sensing element may be a thermocouple that is mounted to the dust removal controller 32.

The temperature detecting part detects the actual temperature in the accommodating cavity 13 in real time and feeds back to the dust removal controller 32, and the dust removal controller 32 compares the actual temperature with a preset temperature threshold value and controls the fan 31 to start when the actual temperature is larger than the preset temperature threshold value.

The setting of temperature detection spare can realize holding the automatic control of intracavity 13 temperature, and laser rangefinder sensor 1's use is more humanized.

Referring again to fig. 3, 4 and 5, in some embodiments, the laser ranging sensor 1 further includes an adjustment assembly disposed on the housing 10 and electrically connected to the dust removal controller 32. The dust removal controller 32 is used for controlling the fan 31 to work at the first output power and/or controlling the adjusting component to increase the opening of the air inlet 14 and the air outlet 41 when the actual amplitude of the laser beam received by the laser component 20 is smaller than or equal to the adjusting amplitude. The dust removal controller 32 is further configured to control the fan 31 to operate with the second output power and/or control the adjusting component to adjust the opening of the air inlet 14 and the air outlet 41 when the actual amplitude of the laser beam received by the laser component 20 is greater than the adjusting amplitude but less than or equal to the preset amplitude; the adjusting amplitude is smaller than the preset amplitude, and the first output power is larger than the second output power.

Wherein, the adjusting components are divided into two groups, one group is used for adjusting the opening of the air inlet hole 14, and the other group is used for adjusting the opening of the air outlet hole 41.

Preferably, the adjusting assembly is disposed in the accommodating cavity 13, and may include an adjusting baffle and an adjusting motor, where the adjusting baffle is in transmission connection with the adjusting motor, and the adjusting motor is used for driving the adjusting baffle to rotate or translate, so that the adjusting baffle can adjust the opening of the air inlet hole 14 or the air outlet hole 41.

When the actual amplitude of the laser beam received by the laser receiver is smaller than or equal to the adjustment amplitude, it indicates that the light transmittance of the light transmitting member 40 is small, and at this time, the output power of the fan 31 is increased, and/or the openings of the air inlet hole 14 and the air outlet hole 41 are increased, so that the air flow can be increased, and the larger wind power dust removal is achieved, and the dust removal effect is better.

When the actual amplitude of the laser beam received by the laser receiver is smaller than or equal to the preset amplitude and is larger than the adjustment amplitude, the light transmittance of the light transmitting member 40 is not quite large, and at this time, the output power of the fan 31 is properly reduced, and/or the openings of the air inlet hole 14 and the air outlet hole 41 are properly reduced, so that the air flow can be properly increased, and the energy consumption can be reduced while the dust can be removed.

Referring to fig. 1, in some embodiments, a dust guide wall 17 is formed on the housing 10, and the dust guide wall 17 is disposed downstream of the light-transmitting member 40 along a dust removal direction (a direction indicated by X in fig. 1) of the airflow, and is disposed obliquely downward in the dust removal direction, and the dust guide wall 17 is used for guiding dust to fall.

The dust guide wall 17 is constructed by the housing 11. The dust guiding wall 17 is used for guiding dust to fall along the direction of gravity, so as to reduce the risk of poor dust removal effect of the light-transmitting member 40 caused by dust accumulation.

In some embodiments, the outer surface of the light-transmitting member 40 facing away from the receiving cavity 13 is also covered with a slip-enhancing coating for increasing the surface smoothness.

For example, the slip coating may be an AR coating (Anti Reflection Coating). The AR coating can increase the light transmittance of the light transmitting member 40 in addition to the smoothness of the outer surface of the light transmitting member 40, so that the measurement sensitivity of the laser ranging sensor 1 is increased.

The slip-increasing coating is used for increasing the smoothness of the outer surface of the light-transmitting piece 40, so that the difficulty that dust adheres to the outer surface of the light-transmitting piece 40 can be increased, and in the dust removal process, the dust falls more easily, so that the light transmittance of the light-transmitting piece 40 can be maintained, and the ranging performance of a product is improved.

Referring to fig. 2, 3, 4, 5 and 6 again, in some embodiments, the laser ranging sensor 1 further includes a water blocking air passing component 50, the water blocking air passing component 50 includes a first water blocking air passing component 51 and a second water blocking air passing component 52, the first water blocking air passing component 51 covers the air inlet hole 14, and the second water blocking air passing component 52 covers the air outlet hole 41.

As an example, the water-blocking overair assembly 50 may be disposed outside the accommodating cavity 13, and preferably, the water-blocking overair assembly 50 is disposed inside the accommodating cavity 13, so as to reduce the influence of external illumination, water vapor and the like on the same, and have a longer service life.

The first water-blocking air-passing member 51 and the second water-blocking air-passing member 52 are membrane-shaped and have a relatively thin thickness, and the first water-blocking air-passing member 51 and the second water-blocking air-passing member 52 are both used for blocking water vapor and dust and can pass through the air.

The first water-blocking air-passing member 51 and the second water-blocking air-passing member 52 are arranged, so that on one hand, water vapor and dust can be isolated, and the fault of the laser ranging sensor 1 caused by the contact of the water vapor and dust with the laser component 20 can be avoided; on the other hand, the air flow can enter the accommodating cavity 13 through the first water-blocking air passing piece 51 and flow out of the accommodating cavity 13 through the second water-blocking air passing piece 52, so that heat dissipation can be performed, and meanwhile, dust removal can be performed on the light-transmitting piece 40.

Further, in some embodiments, the water-blocking gas passing assembly 50 further includes a first pressing plate 53 and a second pressing plate 54, the first pressing plate 53 is used for detachably pressing the first water-blocking gas passing member 51 against the housing 10, and the second pressing plate 54 is used for detachably pressing the second water-blocking gas passing member 52 against the housing 10.

The first pressing plate 53 and the second pressing plate 54 are disposed in the accommodating cavity 13, and are respectively used for pressing the first water-blocking air-passing member 51 and the second water-blocking air-passing member 52. The arrangement of the first pressing plate 53 and the second pressing plate 54 greatly improves the convenience and stability of the installation of the first water-blocking air-passing member 51 and the second water-blocking air-passing member 52.

It should be noted that, to further improve the stability of installation, the first pressure plate 53 completely covers the first water-blocking overair piece 51, and the second pressure plate 54 completely covers the second water-blocking overair piece 52. In order to ensure the air flow, the first pressure plate 53 is aligned with the air inlet 14 to form a first avoiding hole, the second pressure plate 54 is aligned with the air outlet 41 to form a second avoiding hole, and both the first avoiding hole and the second avoiding hole can allow the air flow to pass through.

According to the laser ranging sensor 1, the dust removing assembly 30 is arranged, when dust accumulation exists in the light transmitting piece 40 and the light transmittance is affected, the dust removing assembly 30 is started and drives external air flow to blow the outer surface of the light transmitting piece 40, and dust is removed from the outer surface of the light transmitting piece 40. Compared with manual operation, the mode is convenient to operate, high in efficiency, intelligent and humanized, and therefore user experience is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (7)

1. A laser ranging sensor, the laser ranging sensor comprising:

The shell (10) is internally provided with a containing cavity (13) which is provided with an air inlet hole (14) and a light hole (15), and the shell (10) is also provided with an air guide wall (16);

A laser assembly (20) disposed in the accommodating chamber (13) and configured to emit and receive a laser beam;

A light-transmitting piece (40) which is covered at the light-transmitting hole (15) and is used for transmitting laser beams, wherein the light-transmitting piece (40) is provided with an air outlet hole (41) which is opposite to the air guide wall (16); and

The dust removing assembly (30) is arranged in the accommodating cavity (13);

The external air flow sequentially flows through the air inlet hole (14) under the driving of the dust removing component (30), and after the accommodating cavity (13) and the air outlet hole (41) strike the air guide wall (16) to turn, and the dust removing component (40) is subjected to dust removal and flows out;

The dust removing assembly (30) comprises a fan (31) and a dust removing controller (32), and the dust removing controller (32) is electrically connected between the fan (31) and the laser assembly (20);

Condition one: the actual amplitude of the laser beam received by the laser component (20) is smaller than or equal to a preset amplitude;

condition II: the actual temperature in the accommodating cavity (13) is greater than a preset temperature threshold;

The dust removal controller (32) is used for controlling the starting of the fan (31) when at least one of the first condition and the second condition is met;

The dust removal assembly (30) further comprises a temperature detection piece, wherein the temperature detection piece is electrically connected with the dust removal controller (32), and is used for detecting the actual temperature in the accommodating cavity (13) and feeding back to the dust removal controller (32);

The laser ranging sensor further comprises an adjusting component which is arranged on the shell (10) and is electrically connected with the dust removal controller (32);

the dust removal controller (32) is used for controlling the fan (31) to work at a first output power and/or controlling the adjusting component to adjust the opening of the air inlet hole (14) and the air outlet hole (41) when the actual amplitude of the laser beam received by the laser component (20) is smaller than or equal to the adjusting amplitude;

the dust removal controller (32) is further configured to control the fan (31) to operate with a second output power and/or control the adjusting assembly to adjust the opening of the air inlet hole (14) and the air outlet hole (41) when the actual amplitude of the laser beam received by the laser assembly (20) is greater than the adjusting amplitude but less than or equal to the preset amplitude;

The adjustment amplitude is smaller than the preset amplitude, and the first output power is larger than the second output power.

2. The laser ranging sensor according to claim 1, wherein a dust guide wall (17) is formed on the housing (10), the dust guide wall (17) is disposed downstream of the light-transmitting member (40) in a dust removal direction of the air flow and is disposed obliquely downward in the dust removal direction, and the dust guide wall (17) is configured to guide dust to fall.

3. The laser ranging sensor according to claim 1, characterized in that the outer surface of the light-transmitting member (40) facing away from the receiving cavity (13) is further covered with a slip-enhancing coating for increasing the surface smoothness.

4. The laser ranging sensor according to claim 1, further comprising a water-blocking overair assembly (50), the water-blocking overair assembly (50) comprising a first water-blocking overair piece (51) and a second water-blocking overair piece (52), the first water-blocking overair piece (51) covering the air inlet hole (14), the second water-blocking overair piece (52) covering the air outlet hole (41).

5. The laser ranging sensor of claim 4, wherein the water-blocking overair assembly (50) further comprises a first pressure plate (53) and a second pressure plate (54), the first pressure plate (53) being configured to detachably press the first water-blocking overair element (51) against the housing (10), the second pressure plate (54) being configured to detachably press the second water-blocking overair element (52) against the housing (10).

6. The laser ranging sensor according to claim 4 or 5, characterized in that the water-blocking overair assembly (50) is arranged inside the housing cavity (13).

7. The laser ranging sensor as claimed in claim 1, wherein the laser assembly comprises a laser emitting unit and a laser receiving unit;

The laser emitting unit is used for emitting laser beams outwards, and the laser receiving unit is used for receiving the reflected laser beams.