Detection device, method and crane for a load arm

Abstract

The present disclosure relates to a detection device, method and crane of a lifting arm, and relates to the field of mechanical detection. The detection device is arranged on a lifting arm of a crane, the lifting arm comprising a basic arm, a target telescopic arm and at least one other telescopic arm. The detection device comprises a processor, a first number of proximity switches and a second number of metal bodies. The first number of proximity switches are respectively arranged on the inner side of the basic arm, and the second number of metal bodies are respectively arranged on the outer side of the target telescopic arm, which is a telescopic arm nested in the basic arm. Each proximity switch is in a first state if there is a metal body with a distance to the proximity switch less than or equal to a preset distance threshold, and is in a second state if there is no metal body with a distance to the proximity switch less than or equal to the distance threshold. The processor is configured to determine the position of the target telescopic arm according to the state of each proximity switch. The present disclosure improves the accuracy of detecting the position of the target telescopic arm.

Description

Technical Field

[0001] This disclosure relates to the field of mechanical testing, and more specifically, to a testing device, method, and crane for a crane boom. Background Technology

[0002] With rapid societal development, cranes are increasingly widely used in industrial production and construction. Typically, cranes use length sensors to detect the position of the telescopic boom and determine the crane's lifting capacity based on the boom's location and total boom length. However, length sensors are expensive, and the sensor's cable is prone to uneven winding within the cable groove during retraction, leading to errors in the detected boom position and lower accuracy. Summary of the Invention

[0003] The purpose of this disclosure is to provide a crane boom detection device, method, and crane for improving the accuracy of detecting the position of the telescopic boom.

[0004] According to a first aspect of this disclosure, a detection device for a crane boom is provided, the detection device being disposed on the crane boom of a crane, the crane boom including a base boom, a target telescopic boom and at least one other telescopic boom, the detection device including: a processor, a first number of proximity switches and a second number of metal bodies;

[0005] A first number of proximity switches are respectively disposed on the inner side of the basic arm, and a second number of metal bodies are respectively disposed on the outer side of the target telescopic arm, wherein the target telescopic arm is a telescopic arm nested within the basic arm;

[0006] Each proximity switch is in a first state when the distance between the metal object and the proximity switch is less than or equal to a preset distance threshold; and in a second state when the distance between the metal object and the proximity switch is not less than or equal to the distance threshold; the first state and the second state are different.

[0007] The processor is configured to determine the position of the target telescopic arm based on the state of each of the proximity switches.

[0008] Optionally, the proximity switch includes a first proximity switch and a second proximity switch, and the metal body includes a first metal body and a second metal body;

[0009] The first proximity switch is disposed inside the arm head of the basic arm, and the second proximity switch is disposed inside the center of the basic arm.

[0010] The first metal body is disposed on the outer side of the tail of the target telescopic arm, and the second metal body is disposed on the outer side of the center position of the target telescopic arm.

[0011] Optionally, the processor is used to:

[0012] When the first proximity switch is in the first state and the second proximity switch is in the second state, the target telescopic arm is determined to be in the first position;

[0013] When both the first proximity switch and the second proximity switch are in the first state, it is determined that the target telescopic arm is in the second position;

[0014] When the first proximity switch is in the second state and the second proximity switch is in the first state, the target telescopic arm is determined to be in the third position.

[0015] Optionally, the proximity switch includes a third proximity switch, a fourth proximity switch, and a fifth proximity switch, and the metal body includes a third metal body, a fourth metal body, and a fifth metal body;

[0016] The third proximity switch is located inside the head of the basic arm, the fourth proximity switch is located inside the center of the basic arm, and the fifth proximity switch is located inside the tail of the basic arm.

[0017] The third metal body is disposed on the outer side of the tail of the target telescopic arm, the fourth metal body is disposed on the outer side of the center position of the target telescopic arm, and the fifth metal body is disposed on the outer side of the head of the target telescopic arm.

[0018] Optionally, the processor is used to:

[0019] When the third proximity switch is in the first state and the fourth and fifth proximity switches are both in the second state, the target telescopic arm is determined to be in the first position.

[0020] When both the third and fourth proximity switches are in the first state and the fifth proximity switch is in the second state, the target telescopic arm is determined to be in the second position.

[0021] When the third proximity switch, the fourth proximity switch, and the fifth proximity switch are all in the first state, the target telescopic arm is determined to be in the third position.

[0022] Optionally, the processor is further configured to:

[0023] Obtain the total length of the lifting boom and the angle between the lifting boom and the horizontal plane;

[0024] The lifting capacity of the crane is determined based on the position of the target telescopic boom, the total length, and the included angle.

[0025] Optionally, the processor is further configured to:

[0026] When none of the other telescopic arms are extended, the total length is determined based on the position of the target telescopic arm.

[0027] Optionally, the processor is used to:

[0028] Determine whether the total length meets the preset length condition;

[0029] If the total length meets the length condition, determine whether the position of the target telescopic arm meets the preset position condition;

[0030] If the position of the target telescopic boom satisfies the position conditions, the lifting capacity of the crane is determined based on the position of the target telescopic boom, the total length, and the included angle.

[0031] According to a second aspect of the present disclosure, a method for detecting a crane boom is provided, which is applied to a crane boom detection device. The detection device is disposed on the crane boom of a crane. The crane boom includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device includes: a first number of proximity switches and a second number of metal bodies.

[0032] A first number of proximity switches are respectively disposed on the inner side of the basic arm, and a second number of metal bodies are respectively disposed on the outer side of the target telescopic arm, wherein the target telescopic arm is a telescopic arm nested within the basic arm;

[0033] Each proximity switch is in a first state when the distance between the metal object and the proximity switch is less than or equal to a preset distance threshold; and in a second state when the distance between the metal object and the proximity switch is not less than or equal to the distance threshold; the first state and the second state are different.

[0034] The method includes:

[0035] The position of the target telescopic arm is determined based on the state of each proximity switch.

[0036] Optionally, the proximity switch includes a first proximity switch and a second proximity switch, and the metal body includes a first metal body and a second metal body;

[0037] The first proximity switch is disposed inside the arm head of the basic arm, and the second proximity switch is disposed inside the center of the basic arm.

[0038] The first metal body is disposed on the outer side of the tail of the target telescopic arm, and the second metal body is disposed on the outer side of the center position of the target telescopic arm.

[0039] Optionally, determining the position of the target telescopic arm based on the state of each of the proximity switches includes:

[0040] When the first proximity switch is in the first state and the second proximity switch is in the second state, the target telescopic arm is determined to be in the first position;

[0041] When both the first proximity switch and the second proximity switch are in the first state, it is determined that the target telescopic arm is in the second position;

[0042] When the first proximity switch is in the second state and the second proximity switch is in the first state, the target telescopic arm is determined to be in the third position.

[0043] Optionally, the proximity switch includes a third proximity switch, a fourth proximity switch, and a fifth proximity switch, and the metal body includes a third metal body, a fourth metal body, and a fifth metal body;

[0044] The third proximity switch is located inside the head of the basic arm, the fourth proximity switch is located inside the center of the basic arm, and the fifth proximity switch is located inside the tail of the basic arm.

[0045] The third metal body is disposed on the outer side of the tail of the target telescopic arm, the fourth metal body is disposed on the outer side of the center position of the target telescopic arm, and the fifth metal body is disposed on the outer side of the head of the target telescopic arm.

[0046] Optionally, determining the position of the target telescopic arm based on the state of each of the proximity switches includes:

[0047] When the third proximity switch is in the first state and the fourth and fifth proximity switches are both in the second state, the target telescopic arm is determined to be in the first position.

[0048] When both the third and fourth proximity switches are in the first state and the fifth proximity switch is in the second state, the target telescopic arm is determined to be in the second position.

[0049] When the third proximity switch, the fourth proximity switch, and the fifth proximity switch are all in the first state, the target telescopic arm is determined to be in the third position.

[0050] Optionally, the method further includes:

[0051] Obtain the total length of the lifting boom and the angle between the lifting boom and the horizontal plane;

[0052] The lifting capacity of the crane is determined based on the position of the target telescopic boom, the total length, and the included angle.

[0053] Optionally, obtaining the total length of the crane boom includes:

[0054] When none of the other telescopic arms are extended, the total length is determined based on the position of the target telescopic arm.

[0055] Optionally, determining the lifting capacity of the crane based on the position of the target telescopic boom, the total length, and the included angle includes:

[0056] Determine whether the total length meets the preset length condition;

[0057] If the total length meets the length condition, determine whether the position of the target telescopic arm meets the preset position condition;

[0058] If the position of the target telescopic boom satisfies the position conditions, the lifting capacity of the crane is determined based on the position of the target telescopic boom, the total length, and the included angle.

[0059] According to a third aspect of the present disclosure, a crane is provided, wherein a crane boom is provided with a boom detection device as described in any one of the first aspects of the present disclosure.

[0060] Through the above technical solution, the detection device in this disclosure is installed on the boom of a crane. The boom includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device includes a processor, a first number of proximity switches, and a second number of metal bodies. The first number of proximity switches are respectively located on the inner side of the base boom, and the second number of metal bodies are respectively located on the outer side of the target telescopic boom, which is a telescopic boom nested within the base boom. Each proximity switch is in a first state when there is a metal body at a distance less than or equal to a preset distance threshold, and in a second state when there is no metal body at a distance less than or equal to the distance threshold. The first and second states are different. The processor is used to determine the position of the target telescopic boom based on the state of each proximity switch. This disclosure sets proximity switches on the base boom and metal bodies on the target telescopic boom, and determines the position of the target telescopic boom by the state of the proximity switches. This eliminates the need to control the winding and unwinding of the rope, avoiding the problem of uneven rope winding in the rope groove, and improving the accuracy of detecting the position of the target telescopic boom.

[0061] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0062] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0063] Figure 1 This is a schematic diagram of a detection device for a crane boom according to an exemplary embodiment;

[0064] Figure 2 This is a schematic diagram of another detection device for a crane boom according to an exemplary embodiment;

[0065] Figure 3 This is a schematic diagram of another detection device for a crane boom according to an exemplary embodiment;

[0066] Figure 4 This is a schematic diagram of another detection device for a crane boom according to an exemplary embodiment;

[0067] Figure 5 This is a flowchart illustrating a method for detecting a crane boom according to an exemplary embodiment;

[0068] Figure 6 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment;

[0069] Figure 7This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment;

[0070] Figure 8 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment;

[0071] Figure 9 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment;

[0072] Figure 10 This is a block diagram illustrating a crane according to an exemplary embodiment.

[0073] Explanation of reference numerals in the attached figures

[0074] Detection device 100 Processor 101

[0075] Proximity switch 102 metal body 103

[0076] First proximity switch 1021 Second proximity switch 1022

[0077] First metal body 1031 Second metal body 1032

[0078] Third proximity switch 1023; Fourth proximity switch 1024

[0079] Fifth proximity switch 1025 Third metal body 1033

[0080] Fourth metal body 1034 Fifth metal body 1035 Detailed Implementation

[0081] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0082] Figure 1 This is a schematic diagram of a detection device for a crane boom according to an exemplary embodiment, such as... Figure 1 As shown, the detection device 100 is installed on the boom of a crane. The boom includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device 100 includes a processor 101, a first number of proximity switches 102, and a second number of metal bodies 103.

[0083] A first number of proximity switches 102 are respectively disposed on the inner side of the basic arm, and a second number of metal bodies 103 are respectively disposed on the outer side of the target telescopic arm, which is a telescopic arm nested inside the basic arm.

[0084] Each proximity switch 102 is in a first state when the distance between it and a metal object 103 is less than or equal to a preset distance threshold. It is in a second state when no metal object 103 is present and the distance between it and the proximity switch 102 is less than or equal to the distance threshold. The first state and the second state are different.

[0085] The processor 101 is used to determine the position of the target telescopic arm based on the state of each proximity switch 102.

[0086] For example, the detection device 100 can be installed on the boom of a crane to detect the position of the target telescopic boom. This allows the crane to determine the lifting capacity of the boom based on its position, the angle between the boom and the horizontal plane, and the total length of the boom. The boom can include a base boom, a target telescopic boom, and other telescopic booms. The base boom can be understood as a fixed, non-extendable structure at its base. The target telescopic boom can be understood as a telescopic boom nested within and adjacent to the base boom, i.e., a second telescopic boom section. Specifically, the detection device 100 can include a processor 101, a first number of proximity switches 102, and a second number of metal bodies 103. The first number of proximity switches 102 are respectively located on the inner side of the base boom, and the second number of metal bodies 103 are respectively located on the outer side of the target telescopic boom. That is, the side with the proximity switches 102 and the side with the metal bodies 103 are face-to-face.

[0087] For each proximity switch 102, if the distance between the metal body 103 and the proximity switch 102 is less than or equal to a preset distance threshold, then the proximity switch 102 is in a first state; if the distance between the metal body 103 and the proximity switch 102 is greater than the distance threshold, then the proximity switch 102 is in a second state. The distance threshold can be, for example, 20 mm. That is, as any metal body 103 gradually approaches the proximity switch 102, when the distance between the metal body 103 and the proximity switch 102 changes from greater than the distance threshold to less than or equal to the distance threshold, the state of the proximity switch 102 changes from the second state to the first state. As the metal body 103 gradually moves away from the proximity switch 102, and the distance between the metal body 103 and the proximity switch 102 changes from less than or equal to the distance threshold to greater than the distance threshold, the state of the proximity switch 102 changes from the first state to the second state. The first state and the second state are different; for example, when the first state is open, the second state is closed, and when the first state is closed, the second state is open.

[0088] The processor 101 can detect the state of each proximity switch 102 and determine the position of the target telescopic boom based on the state of each proximity switch 102. This allows the crane to determine the lifting capacity corresponding to the boom based on the position of the target telescopic boom, the angle between the boom and the horizontal plane, and the total length of the boom. In this way, by setting proximity switches and metal bodies on the boom and determining the position of the target telescopic boom based on the state of the proximity switches, there is no need to control the winding and unwinding of the rope, avoiding the problem of uneven rope winding in the rope groove, reducing production costs, and improving the accuracy of detecting the position of the target telescopic boom.

[0089] For example, when both the first and second quantities are 4, such as Figure 1 As shown, four proximity switches 102 are arranged on the inner side of the basic arm, and four metal bodies 103 are arranged on the inner side of the target telescopic arm. The four proximity switches 102 and four metal bodies 103 are arranged at equal intervals, and the distance between the four proximity switches 102 is equal to the distance between the four metal bodies 103. The proximity switches 103 are labeled A, B, C, and D from left to right, corresponding to positions A, B, C, and D, respectively. The metal body switches 103 are labeled a, b, c, and d from left to right. When the distance between metal body c and proximity switch A, and between metal body d and proximity switch B, is less than a distance threshold, proximity switches A and B are in the first state, and proximity switches C and D are in the second state. At this time, the processor can determine that metal body d on the target telescopic arm is at position B of the basic arm.

[0090] When the first quantity is 2 and the second quantity is 1, such as Figure 2 As shown, two proximity switches 102 are arranged on the inner side of the basic arm, and a metal body 103 is arranged on the inner side of the tail of the target telescopic arm. The two proximity switches 102 are denoted as proximity switch E and proximity switch F, respectively, corresponding to positions E and F. When the distance between the metal body 103 and proximity switch E is less than a distance threshold, proximity switch E is in the first state and proximity switch F is in the second state. At this time, the processor can determine that the tail of the target telescopic arm is at position E of the basic arm.

[0091] In summary, the detection device of this disclosure is installed on the boom of a crane, which includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device includes a processor, a first number of proximity switches, and a second number of metal bodies. The first number of proximity switches are respectively located on the inner side of the base boom, and the second number of metal bodies are respectively located on the outer side of the target telescopic boom, which is a telescopic boom nested within the base boom. Each proximity switch is in a first state when there is a metal body at a distance less than or equal to a preset distance threshold, and in a second state when there is no metal body at a distance less than or equal to the distance threshold. The first and second states are different. The processor determines the position of the target telescopic boom based on the state of each proximity switch. This disclosure uses proximity switches on the base boom and metal bodies on the target telescopic boom, determining the position of the target telescopic boom through the states of the proximity switches. This eliminates the need to control the winding and unwinding of the rope, avoiding uneven winding of the rope in the rope groove and improving the accuracy of detecting the position of the target telescopic boom.

[0092] Figure 3 This is a schematic diagram illustrating another detection device for a crane boom according to an exemplary embodiment, such as... Figure 3 As shown, the proximity switch 102 includes a first proximity switch 1021 and a second proximity switch 1022, and the metal body 103 includes a first metal body 1031 and a second metal body 1032.

[0093] The first proximity switch 1021 is located inside the arm head of the basic arm, and the second proximity switch 1022 is located inside the center of the basic arm.

[0094] The first metal body 1031 is disposed on the outer side of the tail of the target telescopic arm, and the second metal body 1032 is disposed on the outer side of the center of the target telescopic arm.

[0095] In one application scenario, processor 101 is used for:

[0096] When the first proximity switch 1021 is in the first state and the second proximity switch 1022 is in the second state, the target telescopic arm is determined to be in the first position.

[0097] When both the first proximity switch 1021 and the second proximity switch 1022 are in the first state, the target telescopic arm is determined to be in the second position.

[0098] When the first proximity switch 1021 is in the second state and the second proximity switch 1022 is in the first state, the target telescopic arm is determined to be in the third position.

[0099] For example, there can be two proximity switches 102, including a first proximity switch 1021 and a second proximity switch 1022, and two metal bodies 103, including a first metal body 1031 and a second metal body 1032. Specifically, the first proximity switch 1021 can be located inside the head of the basic arm, the second proximity switch 1022 can be located inside the center of the basic arm, the first metal body 1031 can be located outside the tail of the target telescopic arm, and the second metal body 1032 can be located outside the center of the target telescopic arm. Figure 2 The leftmost end of the basic boom shown is the boom head, and the rightmost end is the boom tail. That is, the boom head is the distal end along the boom's extension / retraction direction, and the boom tail is the proximal end along the boom's extension / retraction direction. Similarly, the leftmost end of the target telescopic boom is the boom head, and the rightmost end is the target telescopic boom tail. That is, the target telescopic boom's boom head is the distal end along the boom's extension / retraction direction, and the target telescopic boom tail is the proximal end along the boom's extension / retraction direction.

[0100] When the distance between the first metal body 1031 and the first proximity switch 1021 is less than a distance threshold, the first proximity switch 1021 is in a first state. At this time, the distances between the first metal body 1031 and the second proximity switch 1022, and between the second metal body 1032 and the second proximity switch 1022, are both greater than the distance threshold. Therefore, the second proximity switch 1022 is in a second state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in a first position, where the first position is the head of the basic arm, i.e., the target telescopic arm is in a fully extended state. When the distances between the first metal body 1031 and the second proximity switch 1022, and between the second metal body 1032 and the first proximity switch 1021, are both less than the distance threshold, both the first proximity switch 1021 and the second proximity switch 1022 are in the first state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in a second position, where the second position is the center position of the basic arm, i.e., the target telescopic arm is in a half-extended state. When the distance between the second metal body 1032 and the second proximity switch 1022 is less than the distance threshold, the second proximity switch 1022 is in the first state. At this time, the distance between the first metal body 1031 and the second proximity switch 1022, and the distance between the second metal body 1032 and the first proximity switch 1021 are both greater than the distance threshold. Therefore, the first proximity switch 1021 is in the second state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in the third position, where the third position is the tail of the basic arm, that is, the target telescopic arm has not extended.

[0101] In this way, by setting a first proximity switch and a second proximity switch on the basic arm, and setting a first metal body and a second metal body on the target telescopic arm, and determining the position of the target telescopic arm by the state of the first proximity switch and the second proximity switch, there is no need to control the winding and unwinding of the rope, which avoids the problem of uneven winding of the rope in the rope groove, reduces production costs, and improves the accuracy of detecting the position of the target telescopic arm.

[0102] Figure 4 This is a schematic diagram illustrating another detection device for a crane boom according to an exemplary embodiment, such as... Figure 4 As shown, the proximity switch 102 includes a third proximity switch 1023, a fourth proximity switch 1024 and a fifth proximity switch 1025, and the metal body 103 includes a third metal body 1033, a fourth metal body 1034 and a fifth metal body 1035.

[0103] The third proximity switch 1023 is located inside the head of the basic arm, the fourth proximity switch 1024 is located inside the center of the basic arm, and the fifth proximity switch 1025 is located inside the tail of the basic arm.

[0104] The third metal body 1033 is located on the outer side of the tail of the target telescopic arm, the fourth metal body 1034 is located on the outer side of the center of the target telescopic arm, and the fifth metal body 1035 is located on the outer side of the head of the target telescopic arm.

[0105] In another application scenario, processor 101 is used for:

[0106] When the third proximity switch 1023 is in the first state and the fourth proximity switch 1024 and the fifth proximity switch are both in the second state, the target telescopic arm is determined to be in the first position.

[0107] When the third proximity switch 1023 and the fourth proximity switch 1024 are both in the first state and the fifth proximity switch 1025 is in the second state, it is determined that the target telescopic arm is in the second position.

[0108] When the third proximity switch 1023, the fourth proximity switch 1024, and the fifth proximity switch 1025 are all in the first state, the target telescopic arm is determined to be in the third position.

[0109] For example, the number of proximity switches 102 can be three, including a third proximity switch 1023, a fourth proximity switch 1024, and a fifth proximity switch 1025. The number of metal bodies 103 can also be three, including a third metal body 1033, a fourth metal body 1034, and a fifth metal body 1035. Specifically, the third proximity switch 1023 can be located inside the head of the basic arm, the fourth proximity switch 1024 can be located inside the center of the basic arm, and the fifth proximity switch 1025 can be located inside the tail of the basic arm. The third metal body 1033 can be located outside the tail of the target telescopic arm, the fourth metal body 1034 can be located outside the center of the target telescopic arm, and the fifth metal body 1035 can be located outside the head of the target telescopic arm.

[0110] When the distance between the third metal body 1033 and the third proximity switch 1023 is less than the distance threshold, the third proximity switch 1023 is in the first state. At this time, the distances between the third metal body 1033, the fourth metal body 1034, and the fifth metal body 1035 and the fourth proximity switch 1024 are all greater than the distance threshold, and the distances between the third metal body 1033, the fourth metal body 1034, and the fifth metal body 1035 and the fifth proximity switch 1025 are all greater than the distance threshold. Therefore, the fourth proximity switch 1024 and the fifth proximity switch 1025 are both in the second state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in the first position, where the first position is the head of the basic arm, that is, the target telescopic arm is in the fully extended state. When the distance between the third metal body 1033 and the fourth proximity switch 1024, and the distance between the fourth metal body 1034 and the third proximity switch 1023 are both less than the distance threshold, the third proximity switch 1023 and the fourth proximity switch 1024 are both in the first state. At this time, the distance between the third metal body 1033, the fourth metal body 1034 and the fifth metal body 1035 and the fifth proximity switch 1025 are all greater than the distance threshold. Therefore, the fifth proximity switch 1025 is in the second state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in the second position, where the second position is the center position of the basic arm, that is, the target telescopic arm is in a half-extended state. When the distance between the third metal body 1033 and the fifth proximity switch 1025, the distance between the fourth metal body 1034 and the fourth proximity switch 1024, and the distance between the fifth metal body 1035 and the third proximity switch 1023 are all less than the distance threshold, the third proximity switch 1023, the fourth proximity switch 1024, and the fifth proximity switch 1025 are all in the first state. At this time, the processor 101 can determine that the tail of the target telescopic arm is in the third position, where the third position is the tail of the basic arm, that is, the target telescopic arm has not extended.

[0111] In this way, by setting a third, fourth, and fifth proximity switch on the basic arm and a third, fourth, and fifth metal body on the target telescopic arm, and determining the position of the target telescopic arm by the state of the third, fourth, and fifth proximity switches, there is no need to control the winding and unwinding of the rope, which avoids the problem of uneven winding of the rope in the rope groove, reduces production costs, and improves the accuracy of detecting the position of the target telescopic arm.

[0112] In another application scenario, processor 101 is also used for:

[0113] Obtain the total length of the boom and the angle between the boom and the horizontal plane.

[0114] Determine the crane's lifting capacity based on the target telescopic boom's position, total length, and included angle.

[0115] In another application scenario, processor 101 is also used for:

[0116] When all other telescopic arms are not extended, the total length is determined based on the position of the target telescopic arm.

[0117] For example, the processor 101 can also obtain the total length of the boom via a length sensor and the angle between the boom and the horizontal plane via an angle sensor. Then, based on the position, total length, and angle of the target telescopic boom, the corresponding lifting capacity of the crane is determined by consulting a preset lifting performance table. This lifting performance table can be understood as a table indicating the relationship between the position, total length, and angle of the target telescopic boom and the lifting capacity. In this way, the crane can control the weight of the object suspended on the boom to be less than the lifting capacity, ensuring safety during construction. Furthermore, because the detected position of the target telescopic boom is more accurate, the obtained lifting capacity is also more accurate.

[0118] It should be noted that if the other telescopic booms of the crane are not extended, the total length can be determined based on the position of the target telescopic boom. For example, when the tail of the target telescopic boom is at the center of the basic boom, the total length can be determined as the sum of the length of the basic boom and half the length of the target telescopic boom.

[0119] In another application scenario, processor 101 is used for:

[0120] Determine whether the total length meets the preset length conditions.

[0121] If the total length meets the length requirement, determine whether the position of the target telescopic arm meets the preset position condition.

[0122] If the position of the target telescopic boom meets the positional conditions, determine the corresponding lifting capacity of the crane based on the position, total length, and included angle of the target telescopic boom.

[0123] For example, the crane's lifting capacity can only be determined if its total length meets a preset length condition and the target telescopic boom's position meets a preset position condition. The length condition can be that the total length of the crane boom is any length from a preset length set, and the position condition can be that the target telescopic boom's position is any position from a preset position set. Therefore, after obtaining the total length of the crane boom, the angle between the crane boom and the horizontal plane, and the position of the target telescopic boom, the processor 101 can first determine if the total length meets the preset length condition. If the total length meets the length condition, it can further determine if the position of the target telescopic boom meets the position condition. If the position of the target telescopic boom meets the position condition, the crane's corresponding lifting capacity can be obtained by looking up a preset lifting performance table based on the target telescopic boom's position, total length, and angle. In this way, because the detected position of the target telescopic boom is more accurate, the obtained lifting capacity is also more accurate.

[0124] Specifically, taking lengths of 10m, 20m, and 30m as examples, and positions including the head and tail of the basic boom as examples, if the total boom length is 12m and the target telescopic boom is at the head of the basic boom, the processor cannot determine the lifting capacity. If the total boom length is 20m and the target telescopic boom is at the center of the basic boom, the processor cannot determine the lifting capacity. If the total boom length is 30m and the target telescopic boom is at the tail of the basic boom, the processor can look up the lifting capacity corresponding to a total boom length of 30m and the target telescopic boom at the tail of the basic boom in the lifting performance table.

[0125] In summary, the detection device of this disclosure is installed on the boom of a crane, which includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device includes a processor, a first number of proximity switches, and a second number of metal bodies. The first number of proximity switches are respectively located on the inner side of the base boom, and the second number of metal bodies are respectively located on the outer side of the target telescopic boom, which is a telescopic boom nested within the base boom. Each proximity switch is in a first state when there is a metal body at a distance less than or equal to a preset distance threshold, and in a second state when there is no metal body at a distance less than or equal to the distance threshold. The first and second states are different. The processor determines the position of the target telescopic boom based on the state of each proximity switch. This disclosure uses proximity switches on the base boom and metal bodies on the target telescopic boom, determining the position of the target telescopic boom through the states of the proximity switches. This eliminates the need to control the winding and unwinding of the rope, avoiding uneven winding of the rope in the rope groove and improving the accuracy of detecting the position of the target telescopic boom.

[0126] Figure 5 This is a flowchart illustrating a method for detecting a crane boom according to an exemplary embodiment, such as... Figure 5 As shown, a detection device 100 is applied to the boom of a crane. The detection device 100 is installed on the boom of the crane. The boom includes a base boom, a target telescopic boom and at least one other telescopic boom. The detection device 100 includes: a first number of proximity switches 102 and a second number of metal bodies 103.

[0127] A first number of proximity switches 102 are respectively disposed on the inner side of the basic arm, and a second number of metal bodies 103 are respectively disposed on the outer side of the target telescopic arm, which is a telescopic arm nested inside the basic arm.

[0128] Each proximity switch 102 is in a first state when the distance between it and a metal object 103 is less than or equal to a preset distance threshold. It is in a second state when no metal object 103 is present and the distance between it and the proximity switch 102 is less than or equal to the distance threshold. The first state and the second state are different.

[0129] The method includes:

[0130] Step 201: Determine the position of the target telescopic arm based on the state of each proximity switch 102.

[0131] In one application scenario, the proximity switch 102 includes a first proximity switch 1021 and a second proximity switch 1022, and the metal body 103 includes a first metal body 1031 and a second metal body 1032.

[0132] The first proximity switch 1021 is located inside the arm head of the basic arm, and the second proximity switch 1022 is located inside the center of the basic arm.

[0133] The first metal body 1031 is disposed on the outer side of the tail of the target telescopic arm, and the second metal body 1032 is disposed on the outer side of the center of the target telescopic arm.

[0134] Figure 6 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment, such as... Figure 6 As shown, step 201 can be achieved in the following way:

[0135] Step 2011: When the first proximity switch 1021 is in the first state and the second proximity switch 1022 is in the second state, determine that the target telescopic arm is in the first position.

[0136] Step 2012: When both the first proximity switch 1021 and the second proximity switch 1022 are in the first state, determine that the target telescopic arm is in the second position.

[0137] Step 2013: When the first proximity switch 1021 is in the second state and the second proximity switch 1022 is in the first state, determine that the target telescopic arm is in the third position.

[0138] In another application scenario, the proximity switch 102 includes a third proximity switch 1023, a fourth proximity switch 1024 and a fifth proximity switch 1025, and the metal body 103 includes a third metal body 1033, a fourth metal body 1034 and a fifth metal body 1035.

[0139] The third proximity switch 1023 is located inside the head of the basic arm, the fourth proximity switch 1024 is located inside the center of the basic arm, and the fifth proximity switch 1025 is located inside the tail of the basic arm.

[0140] The third metal body 1033 is located on the outer side of the tail of the target telescopic arm, the fourth metal body 1034 is located on the outer side of the center of the target telescopic arm, and the fifth metal body 1035 is located on the outer side of the head of the target telescopic arm.

[0141] Figure 7 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment, such as... Figure 7 As shown, step 201 can also be implemented in the following ways:

[0142] Step 2014: When the third proximity switch 1023 is in the first state and the fourth proximity switch 1024 and the fifth proximity switch 1025 are both in the second state, determine that the target telescopic arm is in the first position.

[0143] Step 2015: When the third proximity switch 1023 and the fourth proximity switch 1024 are both in the first state and the fifth proximity switch 1025 is in the second state, determine that the target telescopic arm is in the second position.

[0144] Step 2016: When the third proximity switch 1023, the fourth proximity switch 1024 and the fifth proximity switch 1025 are all in the first state, determine that the target telescopic arm is in the third position.

[0145] Figure 8 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment, such as... Figure 8 As shown, the method also includes:

[0146] Step 202: Obtain the total length of the boom and the angle between the boom and the horizontal plane.

[0147] Step 203: Determine the lifting capacity of the crane based on the position, total length and included angle of the target telescopic boom.

[0148] In one application scenario, step 202 can be implemented as follows:

[0149] When all other telescopic arms are not extended, the total length is determined based on the position of the target telescopic arm.

[0150] Figure 9 This is a flowchart illustrating another method for detecting a crane boom according to an exemplary embodiment, such as... Figure 9 As shown, step 203 can be achieved through the following steps:

[0151] Step 2031: Determine whether the total length meets the preset length conditions.

[0152] Step 2032: If the total length meets the length condition, determine whether the position of the target telescopic arm meets the preset position condition.

[0153] Step 2033: If the position of the target telescopic boom meets the position conditions, determine the lifting capacity of the crane based on the position, total length and included angle of the target telescopic boom.

[0154] The crane detection method in the above embodiments has been described in detail in the embodiments of the crane detection device 100, and will not be elaborated here.

[0155] In summary, the detection device of this disclosure is installed on the boom of a crane, which includes a base boom, a target telescopic boom, and at least one other telescopic boom. The detection device includes a processor, a first number of proximity switches, and a second number of metal bodies. The first number of proximity switches are respectively located on the inner side of the base boom, and the second number of metal bodies are respectively located on the outer side of the target telescopic boom, which is a telescopic boom nested within the base boom. Each proximity switch is in a first state when there is a metal body at a distance less than or equal to a preset distance threshold, and in a second state when there is no metal body at a distance less than or equal to the distance threshold. The first and second states are different. The processor determines the position of the target telescopic boom based on the state of each proximity switch. This disclosure, by setting proximity switches on the base boom and metal bodies on the target telescopic boom, and determining the position of the target telescopic boom based on the states of the proximity switches, eliminates the need to control the winding and unwinding of the rope, avoiding the problem of uneven rope winding in the rope groove, and improving the accuracy of detecting the position of the target telescopic boom.

[0156] Figure 10 This is a block diagram illustrating a crane according to an exemplary embodiment, such as... Figure 10As shown, the crane boom is equipped with a boom detection device 100 according to any of the first aspects of this disclosure.

[0157] Regarding the crane 300 in the above embodiments, the specific manner in which the detection device 100 of the crane boom performs its operation has been described in detail in the embodiments relating to the detection device 100 of the crane boom, and will not be elaborated here.

[0158] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0159] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0160] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A detection device for a crane jib, characterized in that The detection device is arranged on a lifting arm of the crane, the lifting arm comprises a basic arm, a target telescopic arm and at least one other telescopic arm, and the detection device comprises a processor, a first number of proximity switches and a second number of metal bodies; The first number of proximity switches are respectively arranged on the inner side of the basic arm, and the second number of metal bodies are respectively arranged on the outer side of the target telescopic arm, the target telescopic arm being a telescopic arm nested in the basic arm; Each proximity switch is in a first state when the distance between the metal body and the proximity switch is less than or equal to a preset distance threshold, and is in a second state when the distance between the metal body and the proximity switch is not less than the distance threshold, the first state being different from the second state; The processor is configured to determine the position of the target telescopic arm according to the state of each proximity switch; The proximity switches comprise a first proximity switch and a second proximity switch, and the metal bodies comprise a first metal body and a second metal body; The first proximity switch is arranged on the inner side of the head of the basic arm, and the second proximity switch is arranged on the inner side of the central position of the basic arm; The first metal body is arranged on the outer side of the tail of the target telescopic arm, and the second metal body is arranged on the outer side of the central position of the target telescopic arm; Alternatively, the proximity switches comprise a third proximity switch, a fourth proximity switch and a fifth proximity switch, and the metal bodies comprise a third metal body, a fourth metal body and a fifth metal body; The third proximity switch is arranged on the inner side of the head of the basic arm, the fourth proximity switch is arranged on the inner side of the central position of the basic arm, and the fifth proximity switch is arranged on the inner side of the tail of the basic arm; The third metal body is arranged on the outer side of the tail of the target telescopic arm, the fourth metal body is arranged on the outer side of the central position of the target telescopic arm, and the fifth metal body is arranged on the outer side of the head of the target telescopic arm.

2. The detection device of claim 1, wherein, The processor is configured to: determine that the target telescopic arm is in a first position when the first proximity switch is in the first state and the second proximity switch is in the second state; determine that the target telescopic arm is in a second position when the first proximity switch and the second proximity switch are both in the first state; determine that the target telescopic arm is in a third position when the first proximity switch is in the second state and the second proximity switch is in the first state.

3. The detection device of claim 1, wherein, The processor is configured to: determine that the target telescopic arm is in a first position when the third proximity switch is in the first state and the fourth proximity switch and the fifth proximity switch are both in the second state; determine that the target telescopic arm is in a second position when the third proximity switch and the fourth proximity switch are both in the first state and the fifth proximity switch is in the second state; determine that the target telescopic arm is in a third position when the third proximity switch, the fourth proximity switch and the fifth proximity switch are all in the first state.

4. The detection device of claim 1, wherein, The processor is further configured to: acquire a total length of the crane boom and an angle between the crane boom and a horizontal plane; determine the corresponding lifting capacity of the crane according to the position of the target telescopic boom, the total length and the angle.

5. The detection device of claim 4, wherein, The processor is further configured to: determine the total length according to the position of the target telescopic boom when none of the other telescopic booms is extended.

6. The detection device of claim 4, wherein, The processor is configured to: determine whether the total length satisfies a preset length condition; determine whether the position of the target telescopic boom satisfies a preset position condition when the total length satisfies the length condition; determine the corresponding lifting capacity of the crane according to the position of the target telescopic boom, the total length and the angle when the position of the target telescopic boom satisfies the position condition.

7. A method of inspecting a crane jib, characterized in that A detection device applied to a crane boom, the detection device is arranged on a crane boom of a crane, the crane boom comprises a basic boom, a target telescopic boom and at least one other telescopic boom, and the detection device comprises: a first number of proximity switches and a second number of metal bodies; The first number of proximity switches are respectively arranged on the inner side of the basic boom, and the second number of metal bodies are respectively arranged on the outer side of the target telescopic boom, the target telescopic boom being a telescopic boom nested in the basic boom; Each proximity switch is in a first state when the distance between the metal body and the proximity switch is less than or equal to a preset distance threshold, and is in a second state when the distance between the metal body and the proximity switch is not less than or equal to the distance threshold; the first state is different from the second state; The proximity switches comprise a first proximity switch and a second proximity switch, and the metal bodies comprise a first metal body and a second metal body; The first proximity switch is arranged on the inner side of the boom head of the basic boom, and the second proximity switch is arranged on the inner side of the central position of the basic boom; The first metal body is arranged on the outer side of the boom tail of the target telescopic boom, and the second metal body is arranged on the outer side of the central position of the target telescopic boom; Alternatively, the proximity switches comprise a third proximity switch, a fourth proximity switch and a fifth proximity switch, and the metal bodies comprise a third metal body, a fourth metal body and a fifth metal body; The third proximity switch is arranged on the inner side of the boom head of the basic boom, the fourth proximity switch is arranged on the inner side of the central position of the basic boom, and the fifth proximity switch is arranged on the inner side of the boom tail of the basic boom; The third metal body is arranged on the outer side of the boom tail of the target telescopic boom, the fourth metal body is arranged on the outer side of the central position of the target telescopic boom, and the fifth metal body is arranged on the outer side of the boom head of the target telescopic boom. The method comprises: determining the position of the target telescopic boom according to the state of each proximity switch.

8. A crane, characterized in that The crane boom of the crane is provided with the detection device of the crane boom according to any one of claims 1-6.

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