阅读说明：本技术 起重机回转安全提示系统及方法 (Crane rotation safety prompting system and method ) 是由 郭轶 谢军 丁平 于 2021-01-29 设计创作，主要内容包括：本发明提供一种起重机回转安全提示系统及方法,其中,该系统包括：投射光源、光源固定装置和光源投射控制装置；光源固定装置设置于起重机的回转台上；投射光源设置于光源固定装置上；光源投射控制装置分别与投射光源和光源固定装置连接；光源投射控制装置,用于根据起重机的起重臂的工作状态获取投射光源的投射参数,并根据投射参数调节投射光源和/或光源固定装置；投射光源,用于向地面投射安全警示信息。本发明实施例提供的起重机回转安全提示系统及方法,通过光源投射控制装置获取投射参数,使得投射光源根据投射参数投射安全警示信息,标记危险区域,进行安全提示,能有效地降低安全隐患,能实现更安全的起重作业。(The invention provides a system and a method for prompting the rotation safety of a crane, wherein the system comprises: the device comprises a projection light source, a light source fixing device and a light source projection control device; the light source fixing device is arranged on a rotary table of the crane; the projection light source is arranged on the light source fixing device; the light source projection control device is respectively connected with the projection light source and the light source fixing device; the light source projection control device is used for acquiring projection parameters of the projection light source according to the working state of a crane arm of the crane and adjusting the projection light source and/or the light source fixing device according to the projection parameters; and the projection light source is used for projecting the safety warning information to the ground. According to the crane rotation safety prompting system and method provided by the embodiment of the invention, the projection parameters are obtained through the light source projection control device, so that the projection light source projects safety warning information according to the projection parameters, a dangerous area is marked, safety prompting is carried out, potential safety hazards can be effectively reduced, and safer hoisting operation can be realized.)

1. A hoist gyration safety prompt system which is characterized by comprising: the device comprises a projection light source, a light source fixing device and a light source projection control device;

the light source fixing device is arranged on a rotary table of the crane; the projection light source is arranged on the light source fixing device; the light source projection control device is respectively connected with the projection light source and the light source fixing device;

the light source projection control device is used for acquiring projection parameters of the projection light source according to the working state of a crane arm of the crane and adjusting the projection light source and/or the light source fixing device according to the projection parameters;

and the projection light source is used for projecting safety warning information to the ground.

2. The crane slewing safety prompting system according to claim 1, wherein the light source fixing device comprises a height adjusting mechanism and/or a projection light source angle adjusting mechanism.

3. The crane slewing safety prompting system according to claim 1, wherein the light source projection control device comprises: the device comprises a safe distance acquisition unit and a projection parameter control unit;

the safe distance acquisition unit is used for acquiring the distance between the projection boundary and the rotation center according to the working state of the crane boom;

the projection parameter control unit is used for acquiring the projection parameters of the projection light source according to the distance between the projection boundary and the rotation center, and adjusting the projection light source and/or the light source fixing device according to the projection parameters.

4. The crane slewing safety prompting system according to claim 3, wherein the projection parameter control unit comprises:

and the projection parameter acquisition subunit is used for acquiring at least one of the target height, the projection angle and the projection power of the projection light source according to the distance between the projection boundary and the revolution center.

5. The crane slewing safety prompting system according to claim 3, wherein the projection parameter control unit further comprises: an angle control subunit and/or a height control subunit;

the angle control subunit is used for controlling the light source fixing device to adjust the projection angle of the projection light source;

and the height control subunit is used for controlling the light source fixing device to adjust the height of the projection light source.

6. The system for indicating the slewing safety of a crane according to claim 3, wherein the safety distance obtaining unit is specifically configured to obtain the distance between the projection boundary and the slewing center according to the current length and horizontal included angle of the crane boom and a preset safety margin.

7. The crane slewing safety prompting system according to claim 3, wherein the projection parameter control unit further comprises:

and the power control subunit is used for controlling the projection light source to adjust the projection power.

8. The crane slewing safety prompting system according to any one of claims 1 to 7, further comprising: and the illumination sensor is connected with the light source projection control device.

9. A safety prompting method for crane rotation is characterized by comprising the following steps:

the light source projection control device acquires projection parameters of a projection light source according to the working state of a crane boom of the crane, and adjusts the projection light source and/or the light source fixing device according to the projection parameters;

the projection light source projects safety warning information to the ground.

10. The method for prompting crane slewing safety according to claim 9, wherein the step of acquiring the projection parameters of the projection light source by the light source projection control device according to the working state of the boom of the crane comprises:

the light source projection control device acquires the distance between a projection boundary and the rotation center of the crane according to the working state of the cargo boom;

and the light source projection control device acquires the projection parameters of the projection light source according to the distance between the projection boundary and the rotation center.

Technical Field

The invention relates to the technical field of crane safety, in particular to a system and a method for prompting the rotation safety of a crane.

Background

In order to ensure safety, people are forbidden to stand in a turning area when the crane is used for hoisting, and the accidents of hurting people due to the abnormity of hoisting equipment are avoided.

At present, people in dangerous areas are mainly scattered by visual observation of personnel, safety prompt slogans are printed on a crane boom to remind field workers, the defects that safety boundaries are not clear and prompts are not obvious exist, the field workers can ignore the safety prompt slogans, and certain potential safety hazards exist. Especially, in a low-illuminance environment such as cloudy day or at night, the safety prompt slogan is more difficult to be noticed by field workers, and the potential safety hazard is more serious.

Disclosure of Invention

The invention provides a system and a method for prompting the rotation safety of a crane, which are used for overcoming the defect of potential safety hazard in the prior art and realizing safer crane operation.

The invention provides a safety prompting system for crane rotation, which comprises: the device comprises a projection light source, a light source fixing device and a light source projection control device;

the light source fixing device is arranged on a rotary table of the crane; the projection light source is arranged on the light source fixing device; the light source projection control device is respectively connected with the projection light source and the light source fixing device;

the light source projection control device is used for acquiring projection parameters of the projection light source according to the working state of a crane arm of the crane and adjusting the projection light source and/or the light source fixing device according to the projection parameters;

and the projection light source is used for projecting safety warning information to the ground.

According to the safety prompting system for the rotation of the crane, provided by the invention, the light source fixing device comprises a height adjusting mechanism and/or a projection light source angle adjusting mechanism.

According to the safety prompting system for the rotation of the crane provided by the invention, the light source projection control device comprises: the device comprises a safe distance acquisition unit and a projection parameter control unit;

the safe distance acquiring unit is used for acquiring the distance between a projection boundary and the rotation center according to the working state of the crane boom;

the projection parameter control unit is used for acquiring the projection parameters of the projection light source according to the distance between the projection boundary and the rotation center, and adjusting the projection light source and/or the light source fixing device according to the projection parameters.

According to the safety prompting system for the rotation of the crane, provided by the invention, the projection parameter control unit comprises:

and the projection parameter acquisition subunit is used for acquiring at least one of the target height, the projection angle and the projection power of the projection light source according to the distance between the projection boundary and the revolution center.

According to the safety prompting system for the rotation of the crane provided by the invention, the projection parameter control unit further comprises: an angle control subunit and/or a height control subunit;

the angle control subunit is used for controlling the light source fixing device to adjust the projection angle of the projection light source;

and the height control subunit is used for controlling the light source fixing device to adjust the height of the projection light source.

According to the crane rotation safety prompting system provided by the invention, the safety distance acquiring unit is specifically used for acquiring the distance between the projection boundary and the rotation center according to the current length and horizontal included angle of the crane boom and a preset safety margin.

According to the safety prompting system for the rotation of the crane provided by the invention, the projection parameter control unit further comprises:

and the power control subunit is used for controlling the projection light source to adjust the projection power.

According to the invention, the safety prompt system for the rotation of the crane further comprises: and the illumination sensor is connected with the light source projection control device.

The invention also provides a crane rotation safety prompting method, which comprises the following steps:

the light source projection control device acquires projection parameters of a projection light source according to the working state of a crane boom of the crane, and adjusts the projection light source and/or the light source fixing device according to the projection parameters;

the projection light source projects safety warning information to the ground below the far end of the crane boom.

According to the method for prompting the rotation safety of the crane, the specific steps of the light source projection control device for acquiring the projection parameters of the projection light source according to the working state of the cargo boom of the crane comprise:

the light source projection control device acquires the distance between a projection boundary and the rotation center of the crane according to the working state of the cargo boom;

and the light source projection control device acquires the projection parameters of the projection light source according to the distance between the projection boundary and the rotation center.

According to the system and the method for prompting the rotation safety of the crane, the projection light source is fixed at the top end of the light source fixing device arranged on the rotary table of the crane, and the light source projection control device acquires the projection parameters of the projection light source according to the working state of the crane boom of the crane, so that the projection light source projects safety warning information to the ground according to the projection parameters, the range of a dangerous area is marked, safety prompt is performed, potential safety hazards can be effectively reduced, and safer crane operation can be realized.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a crane rotation safety prompting system provided by the invention;

FIG. 2 is a schematic projection diagram of a projection light source in the safety prompting system for crane rotation provided by the invention;

FIG. 3 is a schematic projection diagram of a projection light source in the safety prompting system for crane rotation provided by the invention;

fig. 4 is a schematic flow chart of a crane rotation safety prompting method provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and not order.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In order to overcome the problems in the prior art, the invention provides a crane rotation safety prompting system, which is characterized in that under the condition of low illuminance, safety warning information is projected to the ground below the far end of a crane boom through a projection light source to form a dangerous area prompt so as to warn people who mistakenly enter the dangerous area and quit the dangerous area as soon as possible, so that the potential safety hazard is reduced, and the safety of hoisting operation is improved.

Fig. 1 is a schematic structural diagram of a crane rotation safety prompting system provided by the invention. The following describes a crane rotation safety prompting system according to an embodiment of the invention with reference to fig. 1. As shown in fig. 1, the system includes: a projection light source 101, a light source fixing device 102, and a light source projection control device 103.

The light source fixing device 102 is arranged on a rotary table 104 of the crane; the projection light source 101 is arranged on the light source fixing device 102; the light source projection control device 103 is connected to the projection light source 101 and the light source fixing device 102, respectively.

Fig. 1 shows a case where the light source projection control device 103 is electrically connected to the projection light source 101 and the light source fixing device 102, respectively. The light source projection control device 103 may also be in communication with the projection light source 101 and the light source fixture 102, respectively.

The position of the light source projection control device 103 can be flexibly set, for example, in an operation room on the turntable 104, outside the operation room on the turntable 104, in a portion of the crane other than the turntable, or outside the crane body.

The crane rotation safety prompting system according to the embodiment of the invention is used for performing safety prompting on the rotation area of the crane, and is particularly suitable for performing safety prompting on the rotation area of the crane under a low-light-level condition (such as night or cloudy day).

Preferably, the device is suitable for prompting the area below the arm support in the rotation area so as to prevent safety accidents caused by the falling of the arm support or the falling of articles on the arm support and the like.

Specifically, the light source fixture 102 has a length and stands on a turntable 104 of a crane.

Preferably, a connection line between the light source fixing device 102 and the rotation center of the rotation center is perpendicular to a straight line formed by projection of the crane arm on the ground.

The projection light source 101 is fixed to the light source fixture 102 and can project toward the ground.

Preferably, the projection light source 101 is fixed to the top end of the light source fixture 102.

And the light source projection control device 103 is used for acquiring the projection parameters of the projection light source 101 according to the working state of the crane arm of the crane and adjusting the projection light source 101 and/or the light source fixing device 102 according to the projection parameters.

Specifically, the boom comprises at least a main arm, and accordingly, the working state of the boom can comprise the length, horizontal included angle and the like of the main arm.

According to different working conditions, the cargo boom can further comprise an auxiliary boom besides the main boom, and the working state of the cargo boom can comprise the length and the horizontal included angle of the main boom, the length and the horizontal included angle of the auxiliary boom and the like.

Therefore, the light source projection control device 103 can obtain the projection parameters of the projection light source 101 according to the working state of the boom, and adjust the projection light source 101 and/or the light source fixing device 102 according to the projection parameters, so that the safety warning information projected by the projection light source 101 can correspond to the range of the dangerous area, and the dangerous area can be clearly prompted.

And the projection light source 101 is used for projecting safety warning information to the ground.

Specifically, the projection light source 101 may project safety warning information to the ground for safety prompt.

The light source projection control device 103 adjusts the projection light source 101 and/or the light source fixing device 102 according to the projection parameters, so as to control the position of the safety warning information projected by the projection light source 101 on the ground.

The security alert information may include a security alert image and/or security alert text.

The safety warning image may include at least one of a color, an icon, and a text having a warning effect.

For example, the safety warning information may include a boundary line of a dangerous area, and a prompt slogan such as "dangerous area, no standing".

The safety alert for the hazardous area may include, but is not limited to, the following various forms:

firstly, safety prompt for dangerous areas is always kept;

secondly, according to a preset time interval, a prompt light ray is emitted to form a safety warning information flashing form for safety prompt;

thirdly, safety warning information is projected according to the time sequence, a form that the safety warning information rolls repeatedly is formed, and safety prompt is carried out.

Preferably, the projection light source 101 projects safety warning information to the ground below the distal end of the boom.

The boom distal end refers to the end of the boom distal from the turret 104.

Since the boom rotates with the rotation of the turntable 104 and the light source fixing device 102 is provided on the turntable 104 of the crane at the tip of the light source fixing device 102 to which the projection light source 101 is fixed, the safety warning information projected onto the ground by the projection light source 101 may rotate with the rotation of the turntable 104, and the ground located below the distal end of the boom may give a safety warning to a dangerous area.

According to the embodiment of the invention, the projection light source is fixed at the top end of the light source fixing device arranged on the rotary table of the crane, and the light source projection control device acquires the projection parameters of the projection light source according to the working state of the crane boom, so that the projection light source projects safety warning information to the ground according to the projection parameters, marks the range of a dangerous area, carries out safety prompt, can effectively reduce potential safety hazards, and can realize safer crane operation.

Based on the content of any of the above embodiments, the light source fixing device 102 includes a height adjusting mechanism and/or an angle adjusting mechanism of the projection light source 101.

Specifically, the height of the light source fixture 102 is adjustable, and the light source fixture 102 includes a height adjustment mechanism for adjusting the height of the light source fixture 102.

And the projection light source 101 angle adjusting mechanism is used for adjusting the projection angle of the projection light source 101.

The projection angle of the projection light source 101 refers to an angle between the light emitted from the projection light source 101 and the vertical direction.

By changing the height of the light source fixing device 102 and/or the projection angle of the projection light source 101, the position of the safety warning information on the ground can be changed, the safety warning information is projected on the ground, and safety prompt is performed on a dangerous area.

According to the embodiment of the invention, the height of the projection light source is adjusted by the height adjusting mechanism and/or the projection angle of the projection light source is adjusted by the projection light source angle adjusting mechanism, so that the safety warning information can be projected to the ground, the range of a dangerous area is marked, safety prompt is carried out, potential safety hazards can be effectively reduced, and safer crane operation can be realized.

Based on the content of any of the above embodiments, the light source projection control device 103 includes: the device comprises a safe distance acquisition unit and a projection parameter control unit.

Specifically, the light source projection control device 103 may include a safe distance acquisition unit and a projection parameter control unit.

The safe distance obtaining unit is connected with the projection parameter control unit.

Depending on the adjustment, the projection parameter control unit may be connected to the projection light source 101 and/or the light source fixture 102.

And the safe distance acquisition unit is used for acquiring the distance between the projection boundary and the rotation center according to the working state of the crane boom.

Specifically, the safe distance acquiring unit can acquire the projection length of the crane boom on the ground according to the length and the horizontal included angle of the crane boom based on the geometric projection principle.

The projection length of the boom on the ground can refer to the horizontal distance between the projection of the boom distal end on the ground and the rotation center.

According to the projection length of the crane boom on the ground, the range of the dangerous area can be determined, and the safety distance acquisition unit can acquire the distance between the projection boundary and the rotation center according to the range of the dangerous area.

The distance between the projected boundary and the centre of rotation may be equal to or slightly greater than the projected length of the boom on the ground to ensure safety.

And the projection parameter control unit is used for acquiring the projection parameters of the projection light source 101 according to the distance between the projection boundary and the rotation center, and adjusting the projection light source 101 and/or the light source fixing device 102 according to the projection parameters.

Specifically, the projection parameter control unit may obtain the projection parameter of the projection light source 101 according to the distance between the projection boundary and the rotation center, so that the projection light source 101 may project the safety warning information to the ground below the far end of the boom according to the obtained projection parameter to perform safety prompt.

And the projection parameters are used for controlling the projection light source 101 to project the safety warning information.

For different projection parameters, the projection parameter control unit can adjust the projection parameters through the projection light source 101 and/or the light source fixing device 102, so that the safety warning information can be clearly displayed on the ground for safety prompt.

According to the embodiment of the invention, the range of the dangerous area is obtained through the safe distance obtaining unit, and the projection parameter control unit determines the projection parameters of the projection light source according to the range of the dangerous area, so that the projection light source projects safety warning information to the ground according to the projection parameters, marks the range of the dangerous area, and carries out safety prompt, thereby effectively reducing potential safety hazards and realizing safer crane operation.

Based on the content of any one of the above embodiments, the projection parameter control unit includes: and a projection parameter acquiring subunit, configured to acquire at least one of a target height, a projection angle, and a projection power of the projection light source 101 according to a distance between the projection boundary and the center of rotation.

Specifically, the projection parameters of the projection light source 101 may include at least one of a target height, a projection angle, and a projection power of the projection light source 101.

The target height h may refer to a height of the projection light source 101 from the ground when the safety warning information is projected.

The projection angle γ may refer to an angle between the light projected by the projection light source 101 and the vertical direction.

The projection power may refer to the power of the projection light source 101 when it projects the safety warning information.

Fig. 2 is a projection schematic view of a projection light source in the crane rotation safety prompting system provided by the invention. As shown in FIG. 2, the target height h and the projection angle γ satisfy

Wherein L is₃Representing the distance between the projected boundary and the centre of gyration.

The projection parameter control unit may include a projection parameter acquiring sub-unit, and the projection parameter acquiring sub-unit may acquire at least one of projection parameters, such as a target height, a projection angle, and a projection power of the projection light source 101, according to a distance between the projection boundary and the center of rotation.

According to the embodiment of the invention, the projection of the projection light source on the safety warning information is controlled by adjusting the projection parameters such as the target height, the projection angle and the projection power of the projection light source, so that the range of the dangerous area marked by the projection safety warning information corresponds to the current working state of the crane, the safety prompt can be more effectively carried out, the potential safety hazard can be effectively reduced, and the safer crane operation can be realized.

Based on the content of any of the above embodiments, the projection parameter control unit further includes: an angle control subunit and/or a height control subunit.

In particular, the angle control subunit may be electrically connected with the projection parameter acquisition subunit.

The height control subunit may be electrically connected to the projection parameter acquisition subunit.

And the angle control subunit is used for controlling the light source fixing device 102 to adjust the projection angle of the projection light source 101.

Specifically, the angle control subunit may adjust the angle of the light projected by the projection light source 101 according to the projection angle obtained by the projection parameter obtaining subunit, so that the included angle between the light projected by the projection light source 101 and the vertical direction is the projection angle obtained by the projection parameter obtaining subunit.

And a height control subunit, configured to control the light source fixture 102 to adjust the height of the projection light source 101.

Specifically, the height control subunit may adjust the height of the projection light source 101 to the target height acquired by the projection parameter acquisition subunit by controlling the height adjustment mechanism included in the light source fixture 102, according to the target height acquired by the projection parameter acquisition subunit.

According to the embodiment of the invention, the target height of the projection light source is adjusted through the height control subunit and/or the projection angle of the projection light source is adjusted through the angle control subunit, and the projection of the projection light source on the safety warning information is controlled, so that the range of the dangerous area marked by the projection safety warning information corresponds to the current working state of the crane, the safety prompt can be more effectively carried out, the potential safety hazard can be effectively reduced, and the safer crane operation can be realized.

Based on the content of any of the above embodiments, the safe distance obtaining unit is specifically configured to obtain the distance between the projection boundary and the rotation center according to the length and the horizontal included angle of the current boom and a preset safe margin.

Specifically, the safe distance acquiring unit may acquire the distance between the projection boundary and the rotation center according to the length and the horizontal included angle of the current boom.

The projection length of the boom on the ground can refer to the horizontal distance between the projection of the far end of the boom on the ground and the rotation center, and the projection length L of the boom on the ground is represented by₂And the distance L between the luffing rotating shaft of the arm support and the rotation center₁And (4) forming. L is₁A fixed value for each crane type.

If only the main arm is used at present and the auxiliary arm is not used, the projection length L of the arm support on the ground₂Is calculated by the formula

L₂＝L×cosα

Wherein L represents the length of the main arm; alpha denotes the horizontal angle of the main arm.

If the main arm and the auxiliary arm are used at the same time, the projection length L of the arm support on the ground₂Is calculated by the formula

L₂＝L×cosα+L′×cosβ

Wherein L' represents the length of the secondary arm; beta represents the horizontal angle of the secondary arm.

Distance L between projection boundary and center of revolution₃Can be calculated as

L₃＝L₁+L₂

Fig. 3 is a projection schematic view of a projection light source in the crane rotation safety prompting system provided by the invention. As shown in FIG. 3, a certain safety margin x can be set aside, and the distance L between the projection boundary and the revolution center can be calculated by the following formula₃：

L₃＝L₁+L₂+x

The safety margin x can be 3-10 m according to the different tonnage of the crane.

According to the embodiment of the invention, the distance between the projection boundary and the rotation center is obtained according to the length and the horizontal included angle of the current crane boom, the range of a dangerous area is determined, and a more accurate safety distance can be obtained, so that the safety prompt can be more effectively carried out, the potential safety hazard can be effectively reduced, and safer crane operation can be realized.

Based on the content of any of the above embodiments, the projection parameter control unit further includes: and the power control subunit is used for controlling the projection light source 101 to adjust the projection power.

In particular, the power control subunit may be electrically connected with the projection parameter acquisition subunit.

The power control subunit may adjust the power of the projection light source 101 projecting the safety warning information to the projection power acquired by the projection parameter acquiring subunit.

According to the embodiment of the invention, the projection power of the projection light source is adjusted through the power control subunit, and the projection of the projection light source on the safety warning information is controlled, so that the range of the dangerous area marked by the projection safety warning information corresponds to the current working state of the crane, the safety prompt can be more effectively carried out, the potential safety hazard can be effectively reduced, and the safer crane operation can be realized.

Based on the content of any one of the above embodiments, the crane rotation safety prompting system further includes: and an illumination sensor connected to the light source projection control device 103.

Specifically, the crane rotation safety prompting system can further comprise an illumination sensor.

The illumination sensor may be connected to the light source projection control device 103, and is configured to obtain a current illumination of the working environment of the crane.

If the light source projection control device 103 judges that the current illuminance is lower than the preset illuminance threshold, the working state of the crane boom of the crane is obtained, the projection parameters of the projection light source 101 are obtained according to the working state of the crane boom of the crane, and the projection light source 101 and/or the light source fixing device 102 are adjusted according to the projection parameters, so that the projection light source 101 projects safety warning information to the ground below the far end of the crane boom to perform safety prompt.

According to the embodiment of the invention, the current illumination is obtained through the illumination sensor, so that the safety warning information is projected through the projection light source at low illumination, the range of a dangerous area is marked, safety prompt is carried out, potential safety hazards can be effectively reduced, and safer crane operation can be realized.

Based on the content of any of the above embodiments, the projection light source 101 is a monochromatic or color laser spot light.

Specifically, the projection light source 101 may be a monochromatic laser beam such as a laser beam mainly of red color, or may be a color laser beam.

According to the embodiment of the invention, safety warning information is projected through the monochromatic or color laser spot lamp, the range of the dangerous area is marked, safety prompt is carried out, the potential safety hazard can be effectively reduced, and safer crane operation can be realized.

Based on the content of any of the above embodiments, the number of the projection light sources 101 is one or more.

Specifically, the projection light source 101 may be a laser spot light or a plurality of laser spot lights.

The laser spot lamp can be a monochromatic or color laser spot lamp.

Preferably, a laser spot light may be respectively disposed at both sides of a connection line between the rotation center and the boom to constitute the projection light source 101.

According to the embodiment of the invention, the safety warning information is projected through one or more laser spot lamps, the range of a dangerous area is marked, and safety prompt is carried out, so that the potential safety hazard can be effectively reduced, and safer crane operation can be realized.

Fig. 4 is a schematic flow chart of a method for prompting the rotation safety of a crane provided by the invention. The following describes a crane rotation safety prompting method according to an embodiment of the invention with reference to fig. 4. Based on the content of any of the above embodiments, as shown in fig. 4, the method includes: step 401, the light source projection control device 103 obtains the projection parameters of the projection light source 101 according to the working state of the boom of the crane, and adjusts the projection light source 101 and/or the light source fixing device 102 according to the projection parameters.

Specifically, the boom comprises at least a main arm, and accordingly, the working state of the boom can comprise the length, horizontal included angle and the like of the main arm.

According to different working conditions, the cargo boom can further comprise an auxiliary boom besides the main boom, and the working state of the cargo boom can comprise the length and the horizontal included angle of the main boom, the length and the horizontal included angle of the auxiliary boom and the like.

The light source projection control device 103 can obtain the projection parameters of the projection light source 101 according to the above working state of the crane boom, and adjust the projection light source 101 and/or the light source fixing device 102 according to the projection parameters, so that the safety warning information projected by the projection light source 101 can correspond to the range of the dangerous area, and the dangerous area can be clearly prompted.

The projection parameters may include at least one of a target height, a projection angle, and a projection power of the projection light source 101.

Step 402, the projection light source 101 projects safety warning information to the ground.

Specifically, the projection light source 101 may project the safety warning information to the ground according to the projection parameters obtained in step 401, so as to perform safety prompting.

Preferably, the projection light source 101 projects safety warning information to the ground below the distal end of the boom.

Since the boom rotates with the rotation of the turntable 104 and the light source fixing device 102 is provided on the turntable 104 of the crane at the tip of the light source fixing device 102 to which the projection light source 101 is fixed, the safety warning information projected onto the ground by the projection light source 101 may rotate with the rotation of the turntable 104, and the ground located below the distal end of the boom may give a safety warning to a dangerous area.

The safety alert for the hazardous area may include, but is not limited to, the following various forms:

firstly, safety prompt for dangerous areas is always kept;

secondly, according to a preset time interval, a prompt light ray is emitted to form a safety warning information flashing form for safety prompt;

thirdly, safety warning information is projected according to the time sequence, a form that the safety warning information rolls repeatedly is formed, and safety prompt is carried out.

The method for prompting the rotation safety of the crane provided by the embodiment of the invention is suitable for the system for prompting the rotation safety of the crane provided by the embodiment of the invention, the implementation mode of the method is consistent with that of the system for prompting the rotation safety of the crane provided by any embodiment of the invention, the same beneficial effects can be achieved, and the detailed description is omitted.

The method for prompting the rotation safety of the crane is suitable for the system for prompting the rotation safety of the crane in each embodiment. Therefore, the description and definition in the crane rotation safety prompting system in the foregoing embodiments can be used for understanding the steps in the embodiments of the present invention.

According to the embodiment of the invention, the projection light source is fixed at the top end of the light source fixing device arranged on the rotary table of the crane, and the light source projection control device acquires the projection parameters of the projection light source according to the working state of the crane boom, so that the projection light source projects safety warning information to the ground according to the projection parameters, marks the range of a dangerous area, carries out safety prompt, can effectively reduce potential safety hazards, and can realize safer crane operation.

Based on the content of any of the above embodiments, the specific steps of the light source projection control device 103 acquiring the projection parameters of the projection light source 101 according to the working state of the boom of the crane include: the light source projection control device 103 acquires the distance between the projection boundary and the rotation center of the crane according to the working state of the boom.

Specifically, the light source projection control device 103 may obtain the distance between the projection boundary and the rotation center according to the length and the horizontal included angle of the current boom.

The projection length of the boom on the ground can refer to the horizontal distance between the projection of the far end of the boom on the ground and the rotation center, and the projection length L of the boom on the ground is represented by₂And the distance L between the luffing rotating shaft of the arm support and the rotation center₁And (4) forming. L is₁A fixed value for each crane type.

If only the main arm is used at present and the auxiliary arm is not used, the projection length L of the arm support on the ground₂Is calculated by the formula

L₂＝L×cosα

Wherein L represents the length of the main arm; alpha denotes the horizontal angle of the main arm.

If the main arm and the auxiliary arm are used at the same time, the projection length L of the arm support on the ground₂Is calculated by the formula

L₂＝L×cosα+L′×cosβ

Wherein L' represents the length of the secondary arm; beta represents the horizontal angle of the secondary arm.

Distance L between projection boundary and center of revolution₃Can be calculated as

L₃＝L₁+L₂

A certain safety margin x can be reserved, and the distance L between the projection boundary and the revolution center is calculated through the following formula₃：

L₃＝L₁+L₂+x

The safety margin x can be 3-10 m according to the different tonnage of the crane.

The light source projection control device 103 acquires projection parameters of the projection light source 101 from the distance between the projection boundary and the center of rotation.

Specifically, the light source projection control device 103 may obtain the projection parameters of the projection light source 101 according to the distance between the projection boundary and the rotation center, so that the projection light source 101 may project the safety warning information to the ground below the far end of the crane boom according to the projection parameters obtained in step 401 to perform safety prompt.

According to the embodiment of the invention, the range of the dangerous area is obtained, the projection parameters of the projection light source are determined according to the range of the dangerous area, so that the projection light source projects safety warning information to the ground according to the projection parameters, the range of the dangerous area is marked, safety prompt is carried out, potential safety hazards can be effectively reduced, and safer crane operation can be realized.

The above-described system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.