Intelligent lighting system for a lorry-mounted crane

Abstract

A kind of intelligent lighting system of truck crane, structure includes truck crane body, angle sensor, winch encoder, lighting lamp assembly and control unit.Angular sensor is arranged at the head of horse head arm, winch encoder is arranged at the end of winch, lighting lamp assembly is installed in amplitude rib plate, its inside is equipped with two symmetrical arrangement of pitch servo motor, respectively drive lighting lamp body.Control unit receives sensor data, calculates the length of the lifting arm elevation angle and rope, determines the position of hoisting object, and adjusts the angle of lighting lamp by servo driver control pitch motor, so that light is always accurately irradiated hoisting object.The system can realize lighting follow-up, improve night work safety and operation convenience.

Description

Technical Field

[0001] This utility model relates to an intelligent lighting system for truck-mounted cranes. Background Technology

[0002] A truck-mounted crane is a type of crane mounted on a standard or specially designed truck chassis, with the driver's cab and crane operator's cab separated. The advantages of this type of crane are its high mobility and rapid relocation. For a typical structure, see Chinese Patent CN201410163108.2.

[0003] Truck-mounted cranes present various hazards during nighttime lifting operations. To address this, the crane's boom lighting system can adjust the lamp's pitch angle to match the height of the load, providing illumination for objects at any height. This offers operators a clear and well-lit working environment, helping them promptly identify potential hazards and ensuring safe operation of the truck-mounted crane.

[0004] The existing truck-mounted crane boom lighting system consists of: 1. A lighting lamp is threadedly installed on the side of the boom. 2. The lighting lamp angle is adjusted by manually adjusting the lighting lamp control button.

[0005] The drawbacks of threaded fixed-mount boom lights are as follows: 1. Fixed installation on the side of the boom prevents angle adjustment and ensures the light angle adapts to changes in the height of the load. 2. Existing truck-mounted crane boom lights only illuminate the boom head. 3. While most of the light from existing truck-mounted crane boom lights shines onto the boom wall where the light is mounted, a small portion is obstructed by components in front of the light, resulting in poor illumination and offering no assistance to operators in assessing the lifting environment.

[0006] The disadvantages of manually adjusting the lighting angle are: 1. It is impossible to keep the lighting angle in sync with the height of the hoisted object. 2. If the operator needs to adjust the lighting angle during hoisting, they must do so while operating the crane, which distracts the operator and is detrimental to safe operation. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an intelligent lighting system for truck-mounted cranes. When there is insufficient light at night or in the evening, the angle of the lighting lamp can be adjusted in real time according to the actual position of the hoisted item to always keep the hoisted item illuminated. The method of use is logically clear, the steps are simple, and it is easy to use.

[0008] To solve the above-mentioned technical problems, this utility model provides an intelligent lighting system for truck-mounted cranes, including a truck-mounted crane body, an angle sensor, a winch encoder, a lighting assembly, and a control unit;

[0009] The angle sensor is installed at the head of the boom of the truck-mounted crane and is powered by the truck-mounted crane itself.

[0010] The winch encoder is installed at the end of the winch in the truck-mounted crane body, and the winch encoder is powered by the truck-mounted crane body.

[0011] The lighting assembly includes a housing, which is mounted on the luffing rib of the truck-mounted crane body. The housing contains two pitch motors arranged symmetrically on the left and right. The output shafts of the two pitch motors are both arranged horizontally, and the ends of the two output shafts extend out of the housing from the left and right sides to the corresponding sides and are equipped with lighting bodies. The two pitch motors and the corresponding two lighting bodies are all powered by the truck-mounted crane body.

[0012] The control unit is located on the truck-mounted crane body and is powered by the truck-mounted crane body. The angle sensor, winch encoder, and two lighting lamp bodies are all electrically connected to the control unit. The two pitch motors are both servo motors, and both pitch motors are electrically connected to the control unit through corresponding servo drivers.

[0013] The method of using the above-mentioned intelligent lighting system for truck-mounted cranes includes the following steps:

[0014] (1) Calibrate the angle sensor readings with the boom elevation angle corresponding to the crane;

[0015] (2) Calibrate the reading of the winch encoder with the corresponding wire length of the winch;

[0016] (3) When the operator turns on the lighting, the control unit controls the lighting body to be powered on and lit. The angle sensor and the winch encoder transmit data back to the control unit in real time. The control unit calculates the current boom elevation angle and winch rope length based on the previous calibration results, thus determining the current position of the hoisted item.

[0017] (4) By controlling the rotation of two pitch motors through the servo control unit, the two lighting lamp bodies are adjusted to a suitable angle so that the light accurately shines on the hoisted items.

[0018] Advantages of this invention: This invention obtains the real-time position of the hoisted item by processing data from the angle sensor located at the boom head and the winch encoder located at the end of the winch. Then, the servo control unit controls the pitch motor to drive the lighting body to deflect at the corresponding angle, so that the light accurately shines on the hoisted item. When hoisting at night, this invention can provide operators with a clear and bright operating environment, ensuring safety. Moreover, the usage method is logically clear, the steps are simple, and it is convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the usage state of this utility model.

[0020] Figure 2 This is a schematic diagram of the installation status of the lighting system of this utility model.

[0021] Figure 3 This is a front view of the lighting assembly in this utility model.

[0022] Figure 4 This is a side view of the lighting assembly in this utility model.

[0023] Figure 5 This is a schematic diagram of the electrical control part in this utility model.

[0024] Figure 6 and Figure 7 This is a schematic diagram of the mathematical model of this utility model in actual use. Detailed Implementation

[0025] See Figures 1-5 A truck-mounted crane intelligent lighting system includes a truck-mounted crane body, an angle sensor 1, a winch encoder 2, a lighting assembly 3, and a control unit 4.

[0026] The angle sensor 1 is installed at the head of the boom 51 of the truck-mounted crane body, and the angle sensor 1 is powered by the truck-mounted crane body.

[0027] The winch encoder 2 is installed at the end of the winch 21 in the truck crane body, and the winch encoder 2 is powered by the truck crane body.

[0028] The lighting assembly 3 includes a housing 31, which is mounted on the luffing rib 52 of the truck crane body. The housing 31 contains two pitch motors 32 arranged symmetrically from left to right. The output shafts 321 of the two pitch motors 32 are both arranged horizontally, and the ends of the two output shafts 321 extend out of the housing 31 from the left and right sides to the corresponding sides and are equipped with lighting bodies 33. The two pitch motors 32 and the corresponding two lighting bodies 33 are all powered by the truck crane body.

[0029] The control unit 4 is located on the truck crane body and is powered by the truck crane body. The angle sensor 1, the winch encoder 2, and the two lighting lamp bodies 33 are all electrically connected to the control unit 4. The two pitch motors 32 are both servo motors and are electrically connected to the control unit 4 through the corresponding servo driver 41.

[0030] A method for using an intelligent lighting system for a truck-mounted crane includes the following steps:

[0031] (1) Calibrate the reading of angle sensor 1 with the elevation angle of boom 5 corresponding to the crane;

[0032] (2) Calibrate the reading of the winch encoder 2 with the wire length corresponding to the winch 21;

[0033] (3) When the operator turns on the lighting, the control unit 4 controls the lighting body 33 to be powered on and lit. The angle sensor 1 and the winch encoder 2 transmit the data back to the control unit 4 in real time. The control unit 4 calculates the current elevation angle of the crane boom 5 and the length of the rope released by the winch 21 based on the previous calibration results, thus determining the current position of the hoisted item.

[0034] (4) By controlling the two pitch motors 32 to rotate through the servo control unit 4, the two lighting lamp bodies 33 are adjusted to a suitable angle so that the light accurately shines on the hoisted items.

[0035] Advantages of this utility model: This utility model obtains the real-time position of the hoisted item by processing the data obtained from the calibration sensor at the head of the boom 51 and the winch encoder 2 at the end of the winch 21. Then, the servo control unit 4 controls the pitch motor 32 to drive the lighting body 33 to deflect at the corresponding angle, so that the light accurately shines on the hoisted item. When hoisting at night, this utility model can provide the operator with a clear and bright operating environment, ensuring safety. Moreover, the usage method is logically clear, the steps are simple, and it is convenient to use.

[0036] The mathematical model for calibrating the two lights is as follows: Figure 6 , Figure 7 As shown

[0037] (1) When the hoisted object is below the horizontal plane where the lighting assembly is located, the mathematical model is as follows: Figure 5 As shown,

[0038] L is the distance from the lighting assembly to the boom head, which is a constant; L1 is the vertical distance from the boom head to the horizontal plane where the lighting assembly is located, which is a known value; L2 is the vertical distance from the horizontal plane where the lighting assembly is located to the center of gravity of the load, which is a known value; L1 + L2 = L4, and L4 is calculated by the control unit through the hook magnification and the winch encoder; L3 is the horizontal distance from the lighting assembly to the wire rope.

[0039] α is the angle between the boom and the horizontal plane, measured by an angle sensor installed at the boom head; β is the angle to be determined.

[0040] Tanβ=L2 / L3

[0041] β=arctanL2 / L3

[0042] L2 = L4 - L1 = L4 - LSinα

[0043] L3=LCosα

[0044] β=arctan[(L4-LSinα) / (LCosα)]

[0045] The rotation angle of the two lamp bodies is

[0046] α+β=α+arctan(L4-LSinα) / (LCosα)

[0047] (2) When the hoisted object is above the horizontal plane where the lighting assembly is located.

[0048] L is the distance from the lighting assembly to the boom head, which is a fixed value; L1 is the vertical distance from the boom head to the center of gravity of the hoisted object, which is calculated by the control unit through the hook magnification and the winch encoder, and is a known value; L2 is the vertical distance from the center of gravity of the hoisted object to the horizontal plane where the lighting assembly is located.

[0049] α is the angle between the boom and the horizontal plane, measured by the boom head angle sensor installed on the boom head; β is the angle to be determined.

[0050] α-β=arctanL2 / L3

[0051] β=α-arctanL2 / L3

[0052] L2=LSinα-L1

[0053] L3=LCosα

[0054] The rotation angle of the two lamp bodies is

[0055] β=α-arctanL2 / L3=α-arctan[(LSinα-L1) / (LCosα)].

Claims

1. An intelligent lighting system for a truck-mounted crane, characterized in that: Includes the truck-mounted crane body, angle sensor, winch encoder, lighting assembly, and control unit; The angle sensor is installed at the head of the boom of the truck-mounted crane and is powered by the truck-mounted crane itself. The winch encoder is installed at the end of the winch in the truck-mounted crane body, and the winch encoder is powered by the truck-mounted crane body. The lighting assembly includes a housing, which is mounted on the luffing rib of the truck-mounted crane body. The housing contains two pitch motors arranged symmetrically on the left and right. The output shafts of the two pitch motors are both arranged horizontally, and the ends of the two output shafts extend out of the housing from the left and right sides to the corresponding sides and are equipped with lighting bodies. The two pitch motors and the corresponding two lighting bodies are all powered by the truck-mounted crane body. The control unit is located on the truck-mounted crane body and is powered by the truck-mounted crane body. The angle sensor, winch encoder, and two lighting lamp bodies are all electrically connected to the control unit. The two pitch motors are both servo motors, and both pitch motors are electrically connected to the control unit through corresponding servo drivers.

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