A reinforcing steel butt system and method

Abstract

The present application relates to a kind of steel butt joint system and method, the system includes: steel processing equipment, for realizing the butt joint and connection of steel;Signal generating device and signal receiving device;Processor, for analyzing the magnetic detection signal received by signal receiving device, and according to the phase difference between the periodic magnetic detection signal wave crest or wave trough detected by first signal receiving device controls steel processing equipment to complete the first operation of axial deviation alignment, according to the magnetic induction intensity detected by second signal receiving device controls steel processing equipment to complete second operation.The steel butt joint method of the present application can realize the automatic accurate butt joint of two separated steels, and then can make the accurate connection of two independent steels in subsequent connection process, to avoid the axial deviation degree of steel connection too large, resulting in the mechanical properties of the overall steel cage is poor and the maximum bearing support of concrete is affected, even affect the normal use of building.

Description

Technical Field

[0001] This invention relates to the field of engineering technology, and to a docking system and method, particularly to a rebar docking system and method. Background Technology

[0002] Against this backdrop, my country's aging population is becoming increasingly serious, and the labor force is gradually decreasing. Developing mechanized automation is a crucial issue that my country must consider for its development. Therefore, there is an urgent need to improve the efficiency of mechanized automation to address future labor shortages. In the construction of rail transit, the construction of bridges, culverts, or high-rise buildings requires foundation piling according to building requirements. This involves compacting the pile foundation, consisting of a pile cap and pre-embedded piles, into the ground to transfer the load to deeper soil layers, making the building more stable and improving the dynamic characteristics of the foundation. Due to the height and heavy loads of bridges, culverts, and high-rise buildings, piling is essential during construction. This requires drilling holes in the ground using machine drilling and water-jet drilling methods to allow the lowering of the reinforcing cage. After the hole depth meets design requirements, the reinforcing cage is lowered into the hole, and then a guide pipe is inserted for concrete pouring. Although concrete has high compressive strength, its tensile strength is relatively low. If its tensile strength is not optimized, it will increase the safety hazards of the building. To address the aforementioned issues, the construction industry utilizes reinforcing cages in conjunction with concrete. Reinforcing cages enhance the tensile strength of concrete and provide constraint on the concrete pile. However, reinforcing cages are often quite long, requiring multiple ends of reinforcing bars to be connected during fabrication. Traditional methods involve using threaded sleeves to connect the ends, requiring manual placement of the reinforcing bars according to the specified spacing. Each threaded connection requires two workers tightening with torque wrenches. This process leads to inconsistent quality control, sometimes resulting in excessive exposed threads, insufficient torque to meet technical specifications, and is labor-intensive and inefficient, failing to meet construction schedule requirements.

[0003] Chinese patent CN206328956U discloses a rebar sleeve connection device, belonging to the field of building construction technology, to solve the problems of high labor intensity and low efficiency in traditional manual rebar sleeve and rebar connection using pipe wrenches. The connection device includes a clamp, a control device, a transmission device, and a motor connected in sequence. The clamp includes a fixed-end clamp and a movable-end clamp used in conjunction. The movable-end clamp can slide along the rebar it holds under the action of the transmission device. When the first rebar is connected to the rebar sleeve, the fixed-end clamp is connected to the first rebar, and the movable-end clamp is connected to the rebar sleeve. When the second rebar is connected to the rebar sleeve, the fixed-end clamp is connected to the rebar sleeve, and the movable-end clamp is connected to the second rebar. The control device includes an intelligent control device, a main switch, a direction switch, a handle switch, and a distance adjustment rod.

[0004] However, the aforementioned rebar sleeve connection device simply uses a transmission device to move the movable clamp to achieve rebar docking and rotational connection during the connection process. This existing technology lacks an effective method to detect the accuracy of the rebar docking, making it prone to deviations during the docking process. These deviations, in turn, increase the deflection of the rebar connection during rotational connection, affecting the overall mechanical properties of the main reinforcement. Rotating the rebar with misalignment can lead to unexpected stress between the two ends. If one main reinforcement bar has unexpected stress, it will affect the stress distribution within the entire reinforcement cage, resulting in significant internal stress, structural instability, and even affecting the performance of the poured concrete. Unexpected stress within the reinforcement cage may be transferred to the concrete, causing cracking and affecting the overall pile performance, ultimately compromising the safety of the building. Therefore, there is an urgent need for a rebar connection device and method that can ensure accurate rebar docking.

[0005] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a rebar splicing system, the system comprising:

[0007] Rebar processing equipment is used to butt and connect rebars;

[0008] A signal generating device used to transmit periodic magnetic detection signals;

[0009] The signal receiving device includes a first signal receiving device for receiving periodic magnetic detection signals and a second signal receiving device for receiving magnetic induction intensity.

[0010] The processor is used to analyze the magnetic detection signal received by the signal receiving device, and control the rebar processing equipment to complete the first operation of axial deviation alignment based on the phase difference between the peaks or troughs of the periodic magnetic detection signal detected by the first signal receiving device, and control the rebar processing equipment to complete the second operation based on the magnetic induction intensity detected by the second signal receiving device.

[0011] In this invention, rebar butt welding can be understood as: rebar alignment and contact. Rebar alignment can be understood as the rebar processing equipment of this invention controlling the movable end rebar clamp to align the second connecting rebar relative to the first connecting rebar in both the horizontal and vertical directions, so that the axial projection of the second connecting rebar coincides exactly with the cross-section of the first connecting rebar. Rebar contact can be understood as the rebar processing equipment of this invention controlling the movable end rebar clamp to move along the axial direction of the second connecting rebar and reach a position where it just contacts the straight threaded sleeve on the first connecting rebar.

[0012] In this invention, the rebar connection can be understood as follows: when the second connecting rebar is positioned just touching the straight threaded sleeve on the first connecting rebar, the rebar processing equipment of this invention controls the movable end rebar clamp to rotate around the axis of the second connecting rebar, so that the second connecting rebar is screwed into the straight threaded sleeve and touches the first connecting rebar. Preferably, the first operation in response to the periodic magnetic detection signal is to control the movable end rebar clamp to achieve horizontal and vertical displacement;

[0013] In response to the periodic magnetic detection signal, the second operation is to control the movable end rebar clamp to achieve axial displacement along the first connecting rebar held by the fixed end rebar clamp.

[0014] Preferably, the rebar processing equipment includes: a fixed-end rebar clamp for clamping a first connecting rebar, a movable-end rebar clamp for clamping a second connecting rebar, and a moving component for moving the movable-end rebar clamp, wherein the signal generating device is disposed on the fixed-end rebar clamp, and the signal receiving device is disposed on the movable-end rebar clamp.

[0015] Preferably, a rebar processing device is provided, the rebar processing device having a fixed-end rebar clamp and a movable-end rebar clamp arranged opposite to each other, a signal generating device and a signal receiving device respectively disposed on the fixed-end rebar clamp and the movable-end rebar clamp, the rebar processing device being able to perform a first operation of completing deviation alignment and / or a second operation of completing axial docking in response to a periodic magnetic detection signal emitted by the signal generating device, wherein the first operation is related to the phase difference between the peaks or troughs of the periodic magnetic detection signal detected by the first signal receiving device, and the second operation is related to the magnetic induction intensity received by the second signal receiving device.

[0016] Preferably, the first operation in response to the periodic magnetic detection signal is to control the movable end rebar clamp to achieve horizontal and / or vertical displacement;

[0017] The second operation in response to the periodic magnetic detection signal is to control the movable end rebar clamp to achieve axial displacement along the first connecting rebar held by the fixed end rebar clamp.

[0018] Preferably, the displacement direction of the movable end rebar clamp is determined in response to a time stamp generated by the first signal receiver, wherein the time stamp is associated with the time when the periodic magnetic detection signal arrives at the first signal receiver. The time stamp in this invention can be understood as: the binary coordinate point generated when the periodic magnetic detection signal arrives at the first signal receiver, so that this invention can determine the displacement direction of the second connecting rebar based on the obtained binary coordinate point. Preferably, to specifically illustrate how the docking system of this invention controls the movement of the movable end rebar clamp in the horizontal or vertical direction, the four first signal receivers configured on the movable end rebar clamp are now divided into: a first upper signal receiver, a first lower signal receiver, a first left signal receiver, and a first right signal receiver. When the docking system of the present invention completes the alignment of the second connecting steel bar in the horizontal direction, if the first right signal receiver first obtains the magnetic detection signal, the processor can generate a time stamp, recorded as "1". Then, if the first left signal receiver obtains the magnetic detection signal, the processor can generate a time stamp again, recorded as "0". That is, if the second connecting steel bar is closer to the left side of the first connecting steel bar in the initial position, based on the time difference between the first left signal receiver and the first right signal receiver obtaining the magnetic detection signal, and if the first left signal receiver and the first right signal receiver complete the magnetic signal reception, the processor can record the current time stamp as "10", thereby enabling the docking system of the present invention to complete the movement of the second connecting steel bar according to the obtained binary coordinate point.

[0019] Preferably, the axial displacement of the movable end rebar clamp along the first connecting rebar held by the fixed end rebar clamp is related to the charging efficiency of the second signal receiving device, wherein the charging efficiency is at least related to the magnetic induction intensity of the periodic magnetic detection signal received by the second signal receiving device. The charging efficiency in this invention can be understood as the amount of current generated by the coil in the second signal receiving device per unit time. Different distances result in different magnetic flux through the coil in the second signal receiving device, thus causing different amounts of current generated by the coil. When the second connecting rebar is closer to the first connecting rebar, the amount of current generated by the coil is larger; when the second connecting rebar is farther from the first connecting rebar, the amount of current generated by the coil is smaller. Therefore, the distance between the second and first connecting rebars can be fed back through the amount of current generated by the coil in the second signal receiving device per unit time, i.e., the charging efficiency.

[0020] Preferably, the method includes the following steps:

[0021] The first connecting steel bar is fixed to the fixed end steel bar clamp, and the second connecting steel bar is clamped to the movable end steel bar clamp;

[0022] The signal generating device on the fixed end rebar clamp transmits a periodic magnetic detection signal to the signal receiving device on the movable end rebar clamp. In response to the phase difference between the peaks or troughs of the periodic magnetic detection signal detected by the first signal receiving device, the movable end rebar clamp is controlled to move horizontally and / or vertically.

[0023] The axial connection of the second connecting steel bar is achieved in response to the charging efficiency of the second signal receiving device on the movable end steel bar clamp.

[0024] Preferably, after the second connecting steel bar is axially connected, the signal generating device emits magnetic detection signals with different changing periods to verify the accuracy of the connection between the second connecting steel bar and the first connecting steel bar.

[0025] Preferably, this method divides the rebar splicing into three scenarios so that the method can adapt the splicing method to different splicing scenarios. Specifically, it can be divided into the first splicing scenario: the planes on which the end faces of the first connecting rebar and the second connecting rebar are parallel to each other.

[0026] Second docking scenario: The extended axes of the first connecting steel bar and the second connecting steel bar intersect;

[0027] Third docking scenario: The planes containing the end faces of the first connecting steel bar and the second connecting steel bar are not parallel to each other, and the extended lines of the axes of the first connecting steel bar and the second connecting steel bar intersect.

[0028] The beneficial technical effects of the present invention include: the rebar splicing method of the present invention can realize the automated and precise splicing of two separate rebars, so that the two separate rebars keep their axes collinear in space, thereby enabling the two independent rebars to achieve precise connection in the subsequent connection process, so as to avoid excessive axial deviation of the rebar connection, which would lead to a deterioration in the mechanical properties of the overall rebar cage and affect the maximum load-bearing capacity of the concrete, and even affect the normal use of the building.

[0029] This invention uses periodic magnetic detection signals to measure the horizontal and vertical displacement, as well as the axial displacement, of the second connecting rebar, thus avoiding many drawbacks of traditional butt welding methods. For example, traditional butt welding methods use infrared ranging to measure the axial displacement of the rebar joint. However, infrared ranging is easily affected by the external environment. Rebar processing areas on construction sites are often set up outdoors, and high temperatures are unavoidable. The high temperatures affect the accuracy of infrared ranging, leading to excessive feeding of the rebars during axial butt welding, causing them to collide and squeeze each other, and even damaging the equipment. Furthermore, infrared butt welding is also susceptible to smoke and dust in the environment. Material processing on construction sites inevitably involves cutting materials, and the powder generated from cutting or the dust and smoke generated by harsh construction environments can affect the accuracy of infrared butt welding. Furthermore, both infrared and laser butt welding require openings in the equipment to receive infrared or laser light. However, this leads to poor equipment sealing, making the rebar processing equipment susceptible to external air influences in humid or other harsh environments. This accelerates the aging of internal components and affects the overall aging of the rebar processing equipment. This invention, however, uses magnetic signals as the processing signal for rebar butt welding, achieving excellent sealing of the equipment. Even without openings, it can effectively receive periodic magnetic detection signals from the signal generator, providing a stable working environment for the internal components. Therefore, this invention, using periodic magnetic detection signals to achieve horizontal, vertical, and axial displacement of the rebar, avoids many drawbacks of traditional butt welding methods.

[0030] The rebar splicing method of the present invention can quickly and accurately complete the rebar splicing and automatically connect the rebars at both ends, avoiding the inefficiency caused by traditional manual rebar straight thread sleeve connection. The splicing method of the present invention can effectively solve the problems of large workload, slow processing and inconsistent torque in rebar cage processing, and achieve uniform control of the mechanical connection torque of all main rebar straight thread sleeves, so that the longitudinal main rebars of the rebar cage are evenly stressed, ensuring the quality of the pull-out pile, while also greatly reducing processing time and saving construction period. Attached Figure Description

[0031] Figure 1 This is a simplified structural diagram of the steel bar processing equipment of the present invention;

[0032] Figure 2 This is the phase diagram of the periodic magnetic detection signal of the present invention.

[0033] List of reference numerals

[0034] 100: Fixed end rebar clamp; 101: Movable end rebar clamp; 200: First connecting rebar; 201: Second connecting rebar; 300: Straight threaded sleeve; 400: Moving component. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] These and other features and advantages of the invention will be more fully understood through the following description of one or more embodiments of the invention in conjunction with the accompanying drawings.

[0037] The rebar splicing system of the present invention aims to achieve automated and precise splicing of two separate rebars, so that the two separate rebars keep their axes collinear in space, thereby enabling the two independent rebars to be precisely connected in the subsequent connection process. This avoids excessive axial deviation of the rebar connection, which would lead to a deterioration in the mechanical properties of the overall rebar cage and affect the maximum load-bearing capacity of the concrete, or even affect the normal use of the building.

[0038] The rebar splicing system of the present invention includes:

[0039] Rebar processing equipment is used to achieve the fixing and rotational connection of rebars;

[0040] A signal generating device for transmitting detection signals, wherein the signal generating device is capable of transmitting periodic magnetic detection signals;

[0041] A signal receiving device is used to receive the detection signal from the signal generating device, wherein the signal receiving device includes a first signal receiving device for receiving magnetic detection signals and a second signal receiving device for receiving magnetic induction intensity.

[0042] The processor is used to analyze the magnetic detection signal received by the signal receiving device, and control the movable end rebar clamp 101 to drive the second connecting rebar 201 to dock with the first connecting rebar 200 on the fixed end rebar clamp 100 according to the phase difference between the peaks or troughs of the periodic magnetic field detected by the multiple mutually symmetrically arranged first signal receiving devices. The processor can also control the feed amount of the movable end rebar clamp 101 according to the magnetic induction intensity detected by the second signal receiving device.

[0043] According to a preferred embodiment, the rebar processing equipment in the rebar splicing system of the present invention includes at least: a rebar clamp, a moving component 400, and a motor. The rebar clamp includes a fixed-end rebar clamp 100 and a movable-end rebar clamp 101. When splicing rebars using the rebar splicing system of the present invention, the fixed-end rebar clamp 100 can clamp a first connecting rebar 200 with a straight-threaded sleeve 300 at its end, so that the first connecting rebar 200 clamped by the fixed-end rebar clamp 100 can remain stationary during the splicing process and serve as a splicing reference for the second connecting rebar 201. The movable-end rebar clamp 101 is rotatably connected to the moving component 400 and can follow the movement of the moving component 400.

[0044] According to a preferred embodiment, the moving component 400 can move along the axial direction of the first connecting rebar 200 held by the fixed-end rebar clamp 100, as well as in the vertical and horizontal directions, driven by a motor. This allows the movable-end rebar clamp 101, which is movably connected to the moving component 400, to also move in the aforementioned directions. When connecting rebars using the rebar connection system of the present invention, the movable-end rebar clamp 101 can hold the second connecting rebar 201 and move along the axial direction of the first connecting rebar 200 and in the vertical direction, driven by the moving component 400. This allows the second connecting rebar 201 to align with the first connecting rebar 200 during movement.

[0045] According to a preferred embodiment, after the second connecting steel bar 201 is aligned with the first connecting steel bar 200, the second connecting steel bar 201 can be rotatably connected to the straight threaded sleeve 300. The rotation of the fixed-end steel bar clamp 100 causes the second connecting steel bar 201 on it to rotate, thereby rotatably connecting to the straight threaded sleeve 300. That is, the rotation of the fixed-end steel bar clamp 100 connects the second connecting steel bar 201 and the first connecting steel bar 200 into a whole through the straight threaded sleeve 300. The butt welding system of the present invention can ensure the stability and accuracy of the main steel bar butt welding during the main steel bar connection process, thereby ensuring the mechanical properties of the steel bars and guaranteeing the load-bearing capacity, bending resistance, and deformation resistance of the steel bars connected through the straight threaded sleeve 300.

[0046] According to a preferred embodiment, the rebar processing equipment is equipped with a signal generating device and a signal receiving device. The signal generating device is for transmitting periodic magnetic detection signals; the signal receiving device includes a first signal receiving device for receiving magnetic detection signals and a second signal receiving device for receiving magnetic induction intensity. In the docking system of the present invention, the signal generating device is disposed on the fixed-end rebar clamp 100, and the first and second signal receiving devices are disposed on the movable-end rebar clamp 101, so that during the rebar docking process, the signal from the signal generating device can originate from the fixed-end rebar clamp 100 and be received by the signal receiving devices on the movable-end rebar clamp 101.

[0047] Preferably, in order to more accurately ensure the accuracy of the rebar connection, there is one signal generator located above the first connecting rebar 200, four first signal receivers, and one second signal receiver. The first signal receivers are arranged at 90° intervals on the end face of the movable end rebar clamp 101 near the fixed end rebar clamp 100, and the second signal receivers are arranged on the end face of the movable end rebar clamp 101 near the fixed end rebar clamp 100 with their connection lines to the signal generators aligned with the axis of the first connecting rebar 200.

[0048] The rebar splicing steps of the splicing system of the present invention are as follows:

[0049] S1: Fix the first connecting steel bar 200 to the fixed end steel bar clamp 100, and clamp the second connecting steel bar 201 to the movable end steel bar clamp 101;

[0050] S2: The signal generating device transmits a periodic magnetic detection signal. The processor controls the movement of the movable end steel bar clamp 101 according to the phase difference between the peaks or troughs of the periodic magnetic detection signal received by the first signal receiving device to complete the alignment of the second connecting steel bar 201 in the horizontal and vertical directions.

[0051] S3: The signal generating device emits a periodic magnetic detection signal. The processor controls the feed amount of the movable end steel bar clamp 101 based on the charging efficiency fed back by the magnetic induction intensity received by the second signal receiving device, so as to complete the axial docking of the second connecting steel bar 201.

[0052] According to a preferred embodiment, in step S2, the periodic magnetic detection signal emitted by the signal generating device can be achieved by applying an alternating current to the transmitter coil in the signal generating device. When the signal generating device emits the periodic magnetic detection signal, an alternating current is applied to the transmitter coil in the signal generating device, causing the transmitter coil to generate an electromagnetic field, and the intensity of the electromagnetic field can change according to the change of the alternating current, thereby generating a periodically changing magnetic field. Alternatively, the periodic magnetic field generated by the signal generating device can be achieved by an electromagnetic converter, which can convert current into magnetic energy, thereby generating a periodic magnetic field. Preferably, the magnetic field strength and direction of the periodic magnetic field used in this invention can be represented as a sinusoidal change, so that the signal receiving device can acquire a regularly changing magnetic field signal.

[0053] According to a preferred embodiment, in step S2, the processor controls the movement of the movable end rebar clamp 101 based on the phase difference between the peaks or troughs of the periodic magnetic detection signal received by the first signal receiving device, thereby aligning the second connecting rebar 201 in both the horizontal and vertical directions. Based on the sinusoidally varying periodic magnetic detection signal used in this invention, when the first signal receiving device receives the aforementioned periodic magnetic detection signal, the processor in the docking system of this invention can represent the sinusoidal curve of the magnetic field signal received by the first signal receiving device, and thus can control the movement of the movable end rebar clamp 101 based on the phase difference between adjacent peaks or troughs within a complete cycle of the sinusoidal curve represented by the processor.

[0054] Furthermore, the movement of the movable end rebar clamp 101 can be divided into vertical movement and horizontal movement. The four first signal receivers provided in this invention can be arranged in pairs in the vertical and horizontal directions, so that the horizontal or vertical displacement of the movable end rebar clamp 101 can be realized based on the phase difference between adjacent peaks or troughs of the periodic magnetic detection signal fed back by the first signal receivers arranged in the vertical and horizontal directions.

[0055] Specifically, to illustrate how the docking system of the present invention controls the movement of the movable end rebar clamp 101 in the horizontal or vertical direction, the four first signal receivers configured on the movable end rebar clamp 101 are now divided into: a first upper signal receiver B1, a first lower signal receiver B2, a first left signal receiver B3, and a first right signal receiver B4. When docking rebars using the docking system of the present invention, since the second connecting rebar 201 on the movable end rebar clamp 101 has horizontal and vertical deviations relative to the first connecting rebar 200 (which serves as a reference standard), the docking system of the present invention can detect the horizontal and vertical offsets of the second connecting rebar 201 relative to the first connecting rebar 200, and thus can adjust the alignment of the second connecting rebar 201 in stages.

[0056] Specifically, the docking system of the present invention can first detect the horizontal offset of the second connecting steel bar 201 relative to the first connecting steel bar 200, and then use a processor to control the movable end steel bar clamp 101 to drive the second connecting steel bar 201 to correct the offset. The docking system of the present invention can also detect the vertical offset of the second connecting steel bar 201 relative to the first connecting steel bar 200, and then use a processor to control the movable end steel bar clamp 101 to drive the second connecting steel bar 201 to correct the offset.

[0057] According to a preferred embodiment, when the second connecting steel bar 201 is offset in the horizontal direction relative to the first connecting steel bar 200, the time when the periodic magnetic detection signal emitted by the signal generating device arrives at the first left signal receiver B3 and the first right signal receiver B4 is different, and thus the time when the processor generates the sine curve related to the periodic magnetic field is different.

[0058] When the left sine curve LB(t) generated by the processor based on the magnetic detection signal detected by the first left signal receiver B3 and the right sine curve RB(t) generated based on the magnetic detection signal detected by the first right signal receiver B4 are represented in the same coordinate system, the peaks or troughs of the left sine curve LB(t) and the right sine curve RB(t) have a phase difference. The existence of the phase difference can be expressed as a deviation of the second connecting steel bar 201 from the first connecting steel bar 200 in the horizontal direction. The magnitude of the phase difference can be expressed as the degree of deviation between the second connecting steel bar 201 and the first connecting steel bar 200, and can also reflect to some extent the time difference between the periodic magnetic detection signal emitted by the signal generating device and the first left signal receiver B3 and the first right signal receiver B4.

[0059] According to a preferred embodiment, when connecting reinforcing bars using the docking system of the present invention, if the second connecting reinforcing bar 201 is closer to the left side of the first connecting reinforcing bar 200 in its initial position, then when the signal generating device on the fixed end reinforcing bar clamp 100 emits a periodic magnetic detection signal, the detection signal can be preferentially acquired by the first right signal receiver B4, thereby enabling the processor to preferentially generate a right sine curve RB(t). Secondly, the detection signal can be acquired by the first left signal receiver B3, and the processor can then generate a left sine curve LB(t), such as... Figure 2The phase difference between the peaks and troughs of the left sine curve LB(t) and the right sine curve RB(t) can be represented as PV. This system can calculate the deviation based on the value of PV, and the processor can then control the movable end rebar clamp 101 to perform alignment displacement based on the deviation. Preferably, the deviation can be obtained based on the phase difference, time difference, and a fixed constant. The magnitude of the fixed constant generally depends on the propagation speed of electromagnetic waves; in this invention, the fixed constant can be the propagation speed of the electromagnetic field.

[0060] Furthermore, the processor can determine the displacement direction of the movable end rebar clamp 101 in response to the time stamp generated by the first signal receiver. When the first right signal receiver B4 preferentially acquires the magnetic detection signal, the processor can generate a time stamp, recorded as "1". Then, when the first left signal receiver B3 acquires the magnetic detection signal, the processor can generate a time stamp again, recorded as "0". That is, when the second connecting rebar 201 is closer to the left side of the first connecting rebar 200 in the initial position, based on the time difference between the first left signal receiver B3 and the first right signal receiver B4 acquiring the magnetic detection signal, and when the first left signal receiver B3 and the first right signal receiver B4 complete the magnetic signal reception, the processor can record the current time stamp as "10".

[0061] If the second connecting rebar 201 is closer to the right side of the first connecting rebar 200 in its initial horizontal position, then when the signal generating device on the fixed-end rebar clamp 100 emits a periodic magnetic detection signal, the detection signal can be preferentially acquired by the first left signal receiver B3, thereby enabling the processor to preferentially generate a left sine curve LB(t) and generate a time stamp, recorded as "0". Subsequently, the detection signal can be acquired by the first right signal receiver B4, and the processor can then generate a right sine curve RB(t), and generate a time stamp, recorded as "1". That is, when the second connecting rebar 201 is closer to the right side of the first connecting rebar 200 in its initial position, based on the time difference between the first left signal receiver B3 and the first right signal receiver B4 acquiring the magnetic detection signal, the processor can record the current time stamp as "01" after the first left signal receiver B3 and the first right signal receiver B4 have completed receiving the magnetic signal.

[0062] If the second connecting rebar 201 is directly opposite the first connecting rebar 200 in its initial horizontal position, then when the signal generating device on the fixed-end rebar clamp 100 emits a periodic magnetic detection signal, the detection signal can be simultaneously acquired by the first left signal receiver B3 and the first right signal receiver B4, thereby enabling the processor to simultaneously generate a left sine curve LB(t) and a right sine curve RB(t), and the processor can generate a time stamp, denoted as "11". The docking system of the present invention can first detect the horizontal offset of the second connecting rebar 201 relative to the first connecting rebar 200, and the processor can determine the horizontal movement direction of the movable-end rebar clamp 101 based on the corresponding time stamp generated by the order in which the magnetic detection signal is acquired by the first left signal receiver B3 and the first right signal receiver B4 in the horizontal direction. That is, the processor can determine whether the movable-end rebar clamp 101 moves to the left or right relative to the first connecting rebar 200 based on the time stamp.

[0063] Specifically, when the processor receives a time stamp of "01", the processor can control the movable end rebar clamp 101 to move to the left; when the processor receives a time stamp of "10", the processor can control the movable end rebar clamp 101 to move to the right; when the processor receives a time stamp of "11", the processor can control the movable end rebar clamp 101 to maintain its current position in the horizontal direction and can enter the position determination of the movable end rebar clamp 101 in the vertical direction.

[0064] According to a preferred embodiment, the method for determining and connecting the position of the movable end rebar clamp 101 in the vertical direction is the same as the method for determining and connecting the position of the movable end rebar clamp 101 in the horizontal direction. Based on the time difference between the arrival of the periodic magnetic detection signal emitted by the signal generator at the first upper signal receiver B1 and the first lower signal receiver B2, the processor can represent the upper sine curve UB(t) and the lower sine curve DB(t) with a time sequence, and calculate the vertical deviation of the first connecting rebar 200 and the second connecting rebar 201 based on the phase difference PV between the peaks and troughs of the upper sine curve UB(t) and the lower sine curve DB(t). The processor can then control the movable end rebar clamp 101 to perform alignment displacement based on the deviation.

[0065] Similarly, the processor can determine the vertical movement direction of the movable end rebar clamp 101 based on the corresponding time stamps generated by the order in which the magnetic detection signals in the vertical direction are acquired by the first upper signal receiver B1 and the first lower signal receiver B2. That is, the processor can determine whether the movable end rebar clamp 101 moves upward or downward relative to the first connecting rebar 200 based on the time stamps. When calculating the phase difference PV between the upper sine curve UB(t) and the lower sine curve DB(t), the present invention can add a preset difference value so that the preset difference value can balance the time difference between the signal generator reaching the first upper signal receiver B1 and the first lower signal receiver B2.

[0066] Since there is only one signal generator, positioned on the fixed-end rebar clamp 100 above the first connecting rebar 200, there is an inherent time difference between the arrival times of the magnetic detection signal at the first upper signal receiver B1 and the first lower signal receiver B2 when the second connecting rebar 201 is aligned with the first connecting rebar 200. Therefore, to balance this time difference, the present invention introduces a preset difference when calculating the vertical offset of the second connecting rebar 201. This preset difference acts as a compensation parameter and can be calculated based on the time difference between the arrival times of the magnetic detection signal at the first upper signal receiver B1 and the first lower signal receiver B2 when the second connecting rebar 201 is aligned.

[0067] According to a preferred embodiment, the present invention specifically divides rebar splicing into three scenarios, enabling the processor to send different instructions according to the three different scenarios to complete the rapid splicing of the rebars. Specifically, it can be divided into: a first splicing scenario: the planes containing the end faces of the first connecting rebar 200 and the second connecting rebar 201 are parallel to each other; a second splicing scenario: the extended axes of the first connecting rebar 200 and the second connecting rebar 201 intersect; and a third splicing scenario: the planes containing the end faces of the first connecting rebar 200 and the second connecting rebar 201 are not parallel to each other, and the extended axes of the first connecting rebar 200 and the second connecting rebar 201 do not intersect.

[0068] According to a preferred embodiment, in the first docking scenario, the planes on which the end faces of the first connecting steel bar 200 and the second connecting steel bar 201 are located are parallel to each other, that is, the extended lines of the axes of the first connecting steel bar 200 and the second connecting steel bar 201 do not intersect. Therefore, the present invention can directly obtain the time difference value of the magnetic detection signal from the signal receiver, calculate the deviation of the second docking steel bar in the horizontal or vertical direction by the phase difference of the peak or trough of the sine curve represented by the processor, and then control the movable end steel bar clamp 101 to complete the docking.

[0069] According to a preferred embodiment, in the second docking scenario, the extended axes of the first connecting rebar 200 and the second connecting rebar 201 intersect. For example, when docking rebars using the docking system of the present invention, if the periodic magnetic detection signal emitted by the signal generating device arrives at the first left signal receiver B3 and the first right signal receiver B4 at the same time, and the time difference between the periodic magnetic detection signal arriving at the first upper signal receiver B1 and the first lower signal receiver B2 when adjusting the vertical position consistently does not meet a preset difference value, the present invention can determine that it is the second docking scenario, i.e., the extended axes of the first connecting rebar 200 and the second connecting rebar 201 intersect. Further, the docking system of the present invention can determine whether the intersection of the extended axes of the first connecting rebar 200 and the second connecting rebar 201 is a horizontal plane intersection or a vertical plane intersection based on the time difference between the periodic magnetic detection signal arriving at the first left signal receiver B3 and the first right signal receiver B4 or the time difference between the periodic magnetic detection signal arriving at the first upper signal receiver B1 and the first lower signal receiver B2.

[0070] According to a preferred embodiment, if the system of the present invention determines that the current docking scenario is a second docking scenario and the intersection of the extended axes of the first connecting rebar 200 and the second connecting rebar 201 is a vertical plane intersection point, the signal generator of the present invention can generate a directional magnetic field, and the signal generating device can be configured as two signal generating devices symmetrical in the vertical direction relative to the first connecting rebar 200. In the second docking scenario, the docking system of the present invention can determine the axial intersection angle of the first connecting rebar 200 and the second connecting rebar 201 based on the time difference of the directional magnetic field reaching the signal receiver, and then can control the movable end rebar clamp 101 to adjust the second connecting rebar 201 according to the intersection angle, so that the axial extension of the second connecting rebar 201 is in the same direction as the axial extension of the first connecting rebar 200, that is, the first connecting rebar 200 and the second connecting rebar 201 are processed into the first docking scenario, and the docking system of the present invention can complete the rebar docking according to the docking method of the first docking scenario.

[0071] According to a preferred embodiment, in the third docking scenario, the planes containing the end faces of the first connecting steel bar 200 and the second connecting steel bar 201 are not parallel to each other, and the extended axes of the first connecting steel bar 200 and the second connecting steel bar 201 do not intersect. For the aforementioned third docking scenario, the docking system of the present invention can first adjust the first connecting steel bar 200 and the second connecting steel bar 201 to the second docking scenario by using the time difference between the arrival of the periodic magnetic detection signal at the first left signal receiver B3 and the first right signal receiver B4, or the time difference between the arrival of the periodic magnetic detection signal at the first upper signal receiver B1 and the first lower signal receiver B2. That is, at least two sets of signal receivers simultaneously receive the periodic magnetic detection signal within the same time period, or receive the periodic magnetic detection signal when a preset time difference value is met. Then, docking is performed according to the docking method for the second docking scenario.

[0072] According to a preferred embodiment, when the second connecting steel bar 201 completes the alignment of the first connecting steel bar 200 in the vertical or horizontal direction, the present invention can achieve axial docking of the second connecting steel bar 201 in response to the charging efficiency of the second signal receiving device. The charging efficiency can be expressed as distance information between the second connecting steel bar 201 and the first connecting steel bar 200, wherein the charging efficiency is at least related to the magnetic induction intensity received by the second signal receiving device. In the docking system of the present invention, the signal generating device can emit a periodic magnetic detection signal, which can be acquired by the second receiving device, and the second receiving device can provide feedback on the magnetic induction intensity based on the magnitude of the magnetic flux. When the periodic magnetic detection signal emitted by the signal generating device passes through the coil set by the second signal receiving device, the magnetic flux in the coil can change with the change of the periodic magnetic field. At this time, the coil can be subjected to periodic positive and negative voltages, thereby achieving the purpose of charging the coil. Since the magnetic field attenuates with increasing distance, the greater the change in the time frequency of the periodic magnetic field, the faster the electric field attenuates. Therefore, the distance can be estimated using the attenuation of the electric field; that is, the present invention can determine the distance based on the charging efficiency of the periodic magnetic field. In this invention, charging efficiency can be understood as the amount of current generated by the coil in the second signal receiving device per unit time. Due to varying distances, the magnetic flux of the coil in the second signal receiving device differs, resulting in different amounts of current generated by the coil. When the second connecting steel bar 201 is closer to the first connecting steel bar 200, the amount of current generated by the coil is larger; when the second connecting steel bar 201 is farther from the first connecting steel bar 200, the amount of current generated by the coil is smaller. Therefore, the charging efficiency, i.e., the amount of current generated by the coil in the second signal receiving device per unit time, can provide feedback on the distance between the second connecting steel bar 201 and the first connecting steel bar 200. Those skilled in the art can obtain empirical curves of distance-charging efficiency (the amount of current generated in the coil per unit time) through numerous experiments. This allows the docking system of the present invention to calculate the distance to the target point based on the current charging efficiency when aligning the second connecting rebar 201 with the first connecting rebar 200 in the horizontal or vertical direction. This distance can be expressed as the axial distance between the second connecting rebar 201 and the first connecting rebar 200, thus guiding the feed amount of the movable end rebar clamp 101. When the second connecting rebar 201 is docked by controlling the movable end rebar clamp 101 with the distance to the target point calculated by the processor based on the charging efficiency, the second connecting rebar 201 can just contact the straight thread sleeve 300, and the connection between the second connecting rebar 201 and the first connecting rebar 200 can be completed by rotating the movable end rebar clamp 101 clockwise or counterclockwise around the axis of the second connecting rebar 201.

[0073] According to a preferred embodiment, after the second connecting steel bar 201 contacts the straight thread sleeve 300 through the movable end steel bar clamp 101 and before the second connecting steel bar 201 is rotated to connect with the first connecting steel bar 200, the docking system of the present invention can transmit magnetic detection signals with different changing periods through a signal generating device to confirm the alignment of the second connecting steel bar 201 and the first connecting steel bar 200. This avoids signal deviation due to excessive distance or the influence of other signals on the second connecting steel bar 201 during the connection process, which could cause deviations in the alignment of the second connecting steel bar 201 and the first connecting steel bar 200. Preferably, the signal generating device can transmit magnetic detection signals with smaller changing periods to further confirm the alignment of the second docking steel bar 201. By reducing the transmission period of the magnetic detection signal, the signal receiver can receive the magnetic detection signal more quickly, avoiding unexpected effects during the transmission of the magnetic detection signal. Furthermore, a shorter magnetic field changing period can detect minute deviations, and the shorter period can amplify the detection accuracy. Furthermore, when the second connecting steel bar 201 contacts the straight threaded sleeve 300, the distance between the signal generating device and the signal receiving device is closer, resulting in a shorter signal feedback cycle. This allows the docking system of the present invention to further improve calculation accuracy and ensure the alignment between the second connecting steel bar 201 and the first connecting steel bar 200. After the alignment of the second connecting steel bar 201 is completed by transmitting magnetic detection signals with different changing cycles through the signal generating device, and when the phase difference of each sine curve fitted by each signal receiver is within a preset deviation range, the docking system of the present invention can determine that the docking is complete, and then the rotational connection of the second connecting steel bar 201 can begin. By varying the magnetic induction period according to the approach distance, more accurate detection can be achieved while avoiding unnecessary detection losses and reducing the lifespan of the detection equipment. Using a magnetic detection signal with a small variation period at greater distances increases the likelihood of signal loss or erroneous signal detection, potentially causing system errors and hindering the docking process. Furthermore, it impacts power consumption. Battery-powered detection equipment may consume excessive power unnecessarily, reducing its lifespan. This solution, based on automatic detection of the docking process, provides feedback on the accuracy of longitudinal and lateral alignment detection data from the axial docking detection dimension, enabling real-time adjustment of accuracy. By dynamically improving the accuracy of the first detector just before the rebar is sufficiently close to alignment, a more accurate alignment indication can be obtained, resulting in a more precise alignment effect.Preferably, the present invention can achieve axial docking of the second connecting steel bar 201 in response to the charging efficiency of the second signal receiving device. The charging efficiency can be expressed as the distance information between the second connecting steel bar 201 and the first connecting steel bar 200. The charging efficiency provides a detection function and can further reduce the battery capacity of the device, thereby significantly improving the battery life of the device and further reducing the overall cost and increasing the battery life. After the second connecting steel bar 201 contacts the straight thread sleeve 300 through the movable end steel bar clamp 101 and before the second connecting steel bar 201 and the first connecting steel bar 200 are rotated together, the docking system of the present invention can detect the accuracy of steel bar alignment by transmitting a magnetic detection signal with a shorter cycle through the signal generating device. In this case, the distance between the second connecting steel bar 201 and the first connecting steel bar 200 is the closest, thereby maximizing the current generated by the coil in the second signal receiving device, providing more energy for high-frequency, short-cycle detection modes, and thus achieving a mutual gain effect.

[0074] According to a preferred embodiment, the docking system of the present invention can not only achieve the alignment and docking of the second connecting steel bar 201 and the first connecting steel bar 200, but also detect the connection status during the rotational connection of the second connecting steel bar 201 and the first connecting steel bar 200. The docking system of the present invention can determine the steel bar connection deviation based on the magnitude of the induced current during the steel bar rotational connection process. The induced current can be generated by the magnetic field lines emitted by the coil cutting signal generator in the second signal receiver. During the main steel bar connection process, according to acceptance regulations, the deviation of each main steel bar connection should not exceed 5%. However, there are often difficulties in inspection during the main steel bar connection process, so the inspection of the main steel bar deviation can only begin after the main steel bar connection is completed, which is detrimental to the progress of on-site construction and cost control. Therefore, the docking system of the present invention can provide feedback on the docking deviation through the induced current generated by the magnetic field lines emitted by the coil cutting signal generator in the second signal receiver on the movable end steel bar clamp 101 during the steel bar rotational connection process. Furthermore, during the rotational connection of the second docking steel bar, the signal generator of the present invention can emit first and second magnetic fields of different intensities, and the first and second magnetic fields can act on the first region and the second region respectively. In this design, the magnetic field strength of the first magnetic field is zero, while the magnetic field strength of the second magnetic field is non-zero. The first region is the rotation range of the second connecting steel bar 201 within a specified deflection, and the second region is the rotation range of the second connecting steel bar 201 outside the first region. During the rotational connection of the second connecting steel bar 201, the first region is the expected rotation range of the second connecting steel bar 201, and the second region is the unexpected rotation range of the second connecting steel bar 201. When the rotational deflection of the second connecting steel bar 201 exceeds a preset value, the second connecting steel bar 201 rotates from the first region to the second region. Due to the presence of a magnetic field in the second region, the coil in the second signal receiving device can generate current by cutting the magnetic field lines in the second region. This current can be used to power a sound alarm device or a light alarm device, so that when the second connecting steel bar 201 reaches the second region, the present invention can alert on-site personnel to perform docking and debugging via an alarm.

[0075] Throughout the text, the features indicated by “preferred” are only optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

[0076] It should be noted that the specific embodiments described above are exemplary, and those skilled in the art can devise various solutions inspired by the disclosure of this invention. These solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents.

Claims

1. A rebar splicing system, characterized in that, include: Rebar processing equipment for performing rebar splicing, the rebar processing equipment being configured with: A signal generating device used to transmit periodic magnetic detection signals; The signal receiving device includes a first signal receiving device for receiving periodic magnetic detection signals and a second signal receiving device for receiving magnetic induction intensity; The processor is configured to analyze the periodic magnetic detection signal received by the signal receiving device, and control the rebar processing equipment to complete a first operation of axial deviation correction based on the phase difference between the peaks or troughs of the detection signal, and control the rebar processing equipment to complete a second operation of axial movement based on the magnetic induction intensity detected by the second signal receiving device. The rebar processing equipment includes: a fixed-end rebar clamp (100) for clamping a first connecting rebar (200), a movable-end rebar clamp (101) for clamping a second connecting rebar (201), and a moving component (400) for moving the movable-end rebar clamp (101). The signal generating device is disposed on the fixed-end rebar clamp (100), and the signal receiving device is disposed on the movable-end rebar clamp (101). The phase difference is caused by the time difference of the periodic magnetic detection signal propagating from the fixed-end rebar clamp (100) to different movable-end rebar clamps (101). The coil in the second signal receiving device generates an induced current when receiving a periodic magnetic detection signal. The charging efficiency is the amount of current generated by the coil per unit time and is related to the magnetic induction intensity. The displacement of the second operation with axial movement is related to the charging efficiency of the second signal receiving device.

2. The rebar splicing system according to claim 1, characterized in that, The first operation in response to the periodic magnetic detection signal is to control the movable end rebar clamp (101) to achieve horizontal and vertical displacement of the second connecting rebar (201); The second operation in response to the magnetic induction intensity is to control the movable end rebar clamp (101) to achieve displacement of the second connecting rebar (201) along the axis of the first connecting rebar (200).

3. A method for butt welding of reinforcing bars using the butt welding system as described in claim 1 or 2, characterized in that, The method includes the following steps: The first connecting steel bar (200) is fixed to the fixed end steel bar clamp (100), and the second connecting steel bar (201) is clamped to the movable end steel bar clamp (101). The signal generating device on the fixed end rebar clamp (100) transmits a periodic magnetic detection signal to the signal receiving device on the movable end rebar clamp (101). In response to the phase difference between the peaks or troughs of the periodic magnetic detection signal detected by the first signal receiving device, the movable end rebar clamp (101) is controlled to move horizontally and / or vertically. The axial connection of the second connecting steel bar (201) is achieved in response to the charging efficiency of the second signal receiving device on the movable end steel bar clamp (101).

4. The method for butt welding of reinforcing bars according to claim 3, characterized in that, The first operation in response to the periodic magnetic detection signal is to control the movable end rebar clamp (101) to achieve horizontal and / or vertical displacement of the second connecting rebar (201); The second operation in response to the magnetic induction intensity is to control the movable end rebar clamp (101) to achieve displacement of the second connecting rebar (201) along the axis of the first connecting rebar (200).

5. The method for butt welding of reinforcing bars according to claim 3 or 4, characterized in that, The displacement direction of the movable end rebar clamp (101) is determined in response to a time stamp generated by the first signal receiving device, wherein the time stamp is associated with the time when the periodic magnetic detection signal arrives at the first signal receiving device.

6. The method for butt welding of reinforcing bars according to claim 4, characterized in that, The axial displacement of the movable end steel bar clamp (101) along the first connecting steel bar (200) clamped by the fixed end steel bar clamp (100) is related to the charging efficiency of the second signal receiving device, wherein the charging efficiency is at least related to the magnetic induction intensity of the periodic magnetic detection signal received by the second signal receiving device.

7. The method for butt welding of reinforcing bars according to claim 3, characterized in that, After the second connecting steel bar (201) is axially connected, the signal generating device emits magnetic detection signals with different changing cycles to verify the accuracy of the connection between the second connecting steel bar (201) and the first connecting steel bar (200).

8. The method for butt welding of reinforcing bars according to claim 3, characterized in that, This method determines the deflection of the rebar rotation connection in response to the magnitude of the induced current during the rebar rotation connection process, wherein the induced current can be generated by a coil configured in the second signal receiving device cutting the magnetic field emitted by the signal generating device.

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