A reinforcing cage hoisting quality control system and method

Abstract

This invention discloses a quality control system and method for rebar cage hoisting, relating to the field of rebar cage hoisting and detection technology, which can solve the problem of difficulty in detecting bending of rebar cages during hoisting. The embodiment of this invention discloses a rebar cage hoisting quality control system for the hoisting stage before the rebar cage is lowered. It includes a bending detection mechanism, a torsion detection mechanism, a rotation mechanism, a preprocessing module, a control module, and a hoisting mechanism. The bending and torsion detection mechanisms are connected to the preprocessing module, which is connected to the control module. The control module is connected to the rotation mechanism and the hoisting mechanism. The bending detection mechanism generates a first signal based on the bending deformation of the rebar cage; the torsion detection mechanism generates a second signal based on the torsion deformation of the rebar cage; the preprocessing module generates bending amount signals, torsion amount signals, and attitude signals; the control module generates corresponding control signals; and the rotation mechanism executes corresponding rotation actions.

Description

Technical Field

[0001] This invention relates to the field of steel cage hoisting and inspection technology, specifically to a steel cage hoisting quality control system and method. Background Technology

[0002] Referring to the existing Chinese invention patent application number CN201910219941.7, entitled "System and Method for Monitoring Deformation of Reinforcing Cage Lifting in Underground Continuous Wall," with IPC main classification number B66C13 / 16, its technical solution discloses a technical solution for detecting the flexural deformation of the reinforcing cage during the lifting process. However, the reinforcing cage is generally rectangular in shape, and for cylindrical reinforcing cages, bending deformation detection and torsional deformation detection may occur. The existing technology lacks a corresponding technical solution for detecting the deformation of cylindrical reinforcing cages due to the lifting process.

[0003] Before being lowered into the pile hole, the reinforcing cage, which is usually in a horizontal position, needs to be hoisted into an vertical position using hoisting equipment. When the reinforcing cage is long and its overall structural strength is relatively poor, bending can easily occur in the middle area during the transition from a horizontal to a vertical position. Once bending occurs during hoisting, the overall quality of the reinforcing cage will no longer meet construction requirements. Currently, there are no mature methods for quality inspection and control during the hoisting process of the reinforcing cage, therefore, improvements are needed.

[0004] Based on the above background, the inventors have designed a quality control system and method for steel cage hoisting to solve at least one of the above problems, and hereby submit this application. Summary of the Invention

[0005] The purpose of this application is to provide a quality control system and method for rebar cage hoisting, which solves the problem in the prior art that it is difficult to detect bending of rebar cages during hoisting.

[0006] To address the above problems, this application provides the following technical solution: On one hand, this application provides a rebar cage hoisting quality control system for the hoisting stage before the rebar cage is lowered, including a bending detection mechanism, a torsion detection mechanism, a rotation mechanism, a pre-processing module, a control module, and a hoisting mechanism, wherein: The signal output terminals of the bending detection mechanism and the torsion detection mechanism are connected to the signal input terminal of the preprocessing module. The signal output terminal of the preprocessing module is connected to the signal input terminal of the control module. The signal output terminal of the control module is connected to the signal input terminal of the rotating mechanism and the hoisting mechanism. The bending detection mechanism generates a first signal based on the bending deformation during the hoisting of the steel cage; The torsion detection mechanism generates a second signal based on the torsion deformation of the steel cage after it is hoisted to an upright position; The preprocessing module is used to generate bending amount signal, twisting amount signal and attitude signal based on the first signal and the second signal; The control module is used to generate corresponding control signals based on the signals generated by the preprocessing module; The rotating mechanism is used to perform corresponding rotating actions according to the acquired control signals.

[0007] Optionally, the bending detection mechanism includes a plurality of first horizontal sensors and second horizontal sensors located at both ends of the reinforcing cage; The signal output terminals of both the first and second level sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a bending amount processing unit, which generates a bending amount signal based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The signal output terminal of the bending amount processing unit is connected to the signal input terminal of the control module.

[0008] Optionally, the preprocessing module further includes an attitude processing unit, the signal output terminal of which is connected to the signal input terminal of the control module; The attitude processing unit is used to generate attitude signals for hoisting the steel cage based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The attitude signals for hoisting steel cages include horizontal attitude signals, oblique hoisting attitude signals, and vertical attitude signals.

[0009] Optionally, the torsion detection mechanism includes a plurality of first angle sensors and second angle sensors located at both ends of the steel cage; The signal output terminals of both the first and second angle sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a torsion amount processing unit, which generates a torsion amount signal based on the second signal A output by the first angle sensor and the second signal B output by the second angle sensor. The signal output terminal of the torsion amount processing unit is connected to the signal input terminal of the control module.

[0010] Optionally, the control module is used to generate a first control signal based on the bending amount signal and the attitude signal, and to generate a second control signal based on the torsion amount signal and the attitude signal; The rotating mechanism is used to perform corresponding first rotating action and second rotating action according to the first control signal and the second control signal.

[0011] Optionally, the control module includes a judgment unit and a control signal generation unit; The signal input terminals of the judgment unit and the control signal generation unit are both connected to the signal output terminal of the preprocessing module. The signal output terminal of the judgment unit is connected to the signal input terminal of the control signal generation unit. The signal output terminal of the control signal generation unit is connected to the signal input terminal of the rotating mechanism. The judgment unit is used to judge and generate a first judgment signal based on the acquired bending amount signal and a preset bending threshold, and to judge and generate a second judgment signal based on the acquired twisting amount signal and a preset twisting threshold. The control signal generating unit is used to generate a first control signal based on a first judgment signal and an attitude signal, and to generate a second control signal based on a second judgment signal, an attitude signal, and a torsion signal.

[0012] Optionally, the rotating mechanism includes a first motor and a second motor respectively disposed at both ends of the reinforcing cage and used to drive the reinforcing cage to rotate along its axial direction; Both the first motor and the second motor are stepper motors; During the first rotation action, the first motor and the second motor rotate in the same direction; In the second rotation action, the first motor and the second motor rotate in opposite directions, and the rotation angle is half of the total twist angle in the twist signal.

[0013] Optionally, the first rotation action includes clockwise rotation and counterclockwise rotation. After the first motor and the second motor both rotate 180° clockwise, the first motor and the second motor simultaneously rotate 180° counterclockwise, and the above cycle is repeated. In the second rotation action, after the first motor and the second motor rotate in opposite directions, they need to be reset before repeating the second rotation action.

[0014] Optionally, the control module further includes a start / stop control unit, wherein the signal input terminal of the start / stop control unit is connected to the signal output terminal of the control signal generation unit; The signal output terminal of the start / stop control unit is connected to the signal input terminal of the hoisting mechanism; The start / stop control unit is used to generate a pause signal based on the acquired first control signal or second control signal.

[0015] Optionally, it also includes an alarm module, the signal input terminal of which is connected to the signal output terminal of the judgment unit; The warning module is used to output warning signals for excessive bending and excessive twisting based on the obtained first judgment signal and second judgment signal.

[0016] On the other hand, this application provides a method for controlling the quality of rebar cage hoisting, applicable to any of the rebar cage hoisting quality control systems described above, comprising the following steps: S1. Obtain the first signal from the bending detection mechanism and the second signal from the torsion detection mechanism; S2. Preprocess the first signal or the second signal to obtain a bending amount signal and an attitude signal based on the first signal, and a twist amount signal based on the second signal; The attitude signals include horizontal attitude signals, oblique hanging attitude signals, and vertical attitude signals; S3. Determine whether the bending amount of the steel cage exceeds the preset bending threshold. If so, generate the first judgment signal. Determine whether the twisting amount of the steel cage exceeds the preset twisting threshold. If so, generate the second judgment signal. S4. Generate a first control signal based on the inclined hanging attitude signal and the first judgment signal, or generate a second control signal based on the vertical attitude signal and the second judgment signal; S5. Control the first rotation of the steel cage based on the first control signal, or control the second rotation of the steel cage based on the second control signal.

[0017] Optionally, in S4, a pause signal is also generated based on the first judgment signal or the second judgment signal to control the suspension of the lifting mechanism's operation.

[0018] Optionally, S6 is also included. If the first judgment signal or the second judgment signal is generated in S3, then an alarm signal is generated indicating that the bending amount of the reinforcing cage is too large and an alarm signal is generated indicating that the twisting amount of the reinforcing cage is too large.

[0019] The beneficial effects of this invention are: This application, by setting up a bending detection mechanism, a torsion detection mechanism, a rotation mechanism, a pre-processing module, and a control module, enables the steel cage to rotate during hoisting if excessive bending occurs. This rotation, via the control module and the rotation mechanism, transforms the downward bending deformation caused by gravity during hoisting into an upward arching deformation. Under the influence of gravity, the upward arching deformation of the steel cage gradually recovers, thus solving the problem in the prior art where bending during hoisting of steel cages is difficult to detect and control.

[0020] In response to the aforementioned issue that while driving the rebar cage to rotate, this application utilizes its constantly changing downward trend to counteract bending deformation, which may lead to a certain degree of torsional deformation in the rebar cage, this application, through its torsion detection mechanism, pre-processing module, and control module, can apply torque to the rebar cage in the opposite direction of the torsion when the torsion deformation is confirmed to be excessive, thereby reducing the amount of torsion deformation and ensuring the quality of the rebar cage hoisting construction. Attached Figure Description

[0021] Figure 1This is a schematic diagram of module connections in Embodiment 1 of this application.

[0022] Figure 2 This is a schematic diagram of the steel cage in an inclined hanging posture in Embodiment 1 of this application.

[0023] Figure 3 This is a schematic diagram of the logical relationship in Embodiment 2 of this application. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0025] Example 1: like Figure 1 As shown, this embodiment provides a rebar cage hoisting quality control system for the hoisting stage before the rebar cage is lowered. It includes a bending detection mechanism, a torsion detection mechanism, a rotation mechanism, a pre-processing module, a control module, and a hoisting mechanism, wherein: The signal output terminals of the bending detection mechanism and the torsion detection mechanism are connected to the signal input terminal of the preprocessing module. The signal output terminal of the preprocessing module is connected to the signal input terminal of the control module. The signal output terminal of the control module is connected to the signal input terminal of the rotating mechanism and the hoisting mechanism. The bending detection mechanism generates a first signal based on the bending deformation during the hoisting of the steel cage; The torsion detection mechanism generates a second signal based on the torsion deformation of the steel cage after it is hoisted to an upright position; The preprocessing module is used to generate bending amount signal, twisting amount signal and attitude signal based on the first signal and the second signal; The control module is used to generate corresponding control signals based on the signals generated by the preprocessing module. The signals generated by the preprocessing module include the bending amount signal, twisting amount signal, and attitude signal mentioned above. The rotating mechanism is used to execute corresponding rotating actions according to the acquired control signals. This embodiment, by setting up a bending detection mechanism, a torsion detection mechanism, a rotating mechanism, a preprocessing module, and a control module, enables the steel cage to rotate during hoisting if excessive bending occurs. This rotation, via the control module and the rotating mechanism, transforms the downward bending deformation caused by gravity during hoisting into an upward arching deformation. Under gravity, the upward arching deformation gradually recovers, thus solving the problem in the prior art where bending during hoisting of steel cages is difficult to detect and control.

[0026] In response to the aforementioned issue that the steel cage may undergo torsional deformation during the process of rotating and using its downward trend to counteract bending deformation, this embodiment addresses this by using a torsion detection mechanism, a pre-processing module, and a control module to detect excessive torsional deformation of the steel cage. In such cases, a torque can be applied to the steel cage in the opposite direction of the torsion to reduce the amount of torsional deformation and ensure the quality of the steel cage hoisting.

[0027] Specifically, the bending detection mechanism includes several first horizontal sensors and second horizontal sensors located at both ends of the steel cage. The signal output terminals of both the first and second level sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a bending amount processing unit, which generates a bending amount signal based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The signal output terminal of the bending amount processing unit is connected to the signal input terminal of the control module.

[0028] In this embodiment, the first horizontal sensor and the second horizontal sensor are tilt sensors respectively set at both ends of the steel cage. The tilt sensors are existing sensors and will not be described in detail here. By setting the first horizontal sensor and the second horizontal sensor at both ends of the steel cage, the tilt angle values ​​at both ends of the steel cage can be detected. After the first horizontal sensor and the second horizontal sensor obtain the tilt angle values, the tilt angle difference data between the two can be calculated. The bending amount of the steel cage can be determined based on the tilt angle difference data.

[0029] In this embodiment, a mapping curve between the tilt angle difference data and the bending amount of the rebar cage can be pre-drawn. The bending amount of the rebar cage can be quickly obtained based on the tilt angle difference data. During the hoisting process of the rebar cage, if the rigidity of the rebar cage is extremely poor, the maximum tilt angle difference may be 90°, that is, one end of the rebar cage is in a horizontal state, while the other end is in a vertical state, and the middle part of the rebar cage is in a bent state. The minimum tilt angle difference is 0°, that is, the two ends of the rebar cage are parallel to each other, and the rebar cage is in a vertical state. In some embodiments, technicians can also pre-train the model so that after the tilt angle data of the first horizontal sensor and the second horizontal sensor are input into the model, the bending amount of the rebar cage can be determined. Pre-training the model or pre-drawing the mapping curve between the tilt angle difference data and the bending amount of the rebar cage are existing conventional techniques, which will not be elaborated here.

[0030] In this embodiment, the preprocessing module further includes an attitude processing unit, the signal output terminal of which is connected to the signal input terminal of the control module; The attitude processing unit is used to generate attitude signals for hoisting the steel cage based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The attitude signals for hoisting steel cages include horizontal attitude signals, oblique hoisting attitude signals, and vertical attitude signals.

[0031] When determining the hoisting posture of the reinforcing cage, if the tilt angle values ​​in both the first signal A and the first signal B are 0, the reinforcing cage is determined to be in a horizontal posture, and the posture processing unit generates a horizontal posture signal. If the tilt angle value in the first signal B is greater than 0, the reinforcing cage is determined to be in an inclined hoisting posture, and the posture processing unit generates an inclined hoisting posture signal. If the tilt angle values ​​in both the first signal A and the first signal B are 90°, the reinforcing cage is determined to be in an upright posture, and the posture processing unit generates an upright posture signal.

[0032] In this embodiment, the torsion detection mechanism includes a plurality of first angle sensors and second angle sensors located at both ends of the steel cage; The signal output terminals of both the first and second angle sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a torsion amount processing unit, which generates a torsion amount signal based on the second signal A output by the first angle sensor and the second signal B output by the second angle sensor. The signal output terminal of the torsion amount processing unit is connected to the signal input terminal of the control module. In this embodiment, both the first and second angle sensors are conventional angle sensors that can measure the torsion angles at both ends of the rebar cage. After acquiring the second signal A output by the first angle sensor and the second signal B output by the second angle sensor, the sum of the angles between the second signal A and the second signal B can be calculated. The sum of the torsion angles of the two signals is the total torsion angle data of the rebar cage. The torsion amount of the rebar cage can be obtained based on the torsion angle data and the diameter of the rebar cage.

[0033] In this embodiment, the control module is used to generate a first control signal based on the bending amount signal and the attitude signal, and to generate a second control signal based on the torsion amount signal and the attitude signal; The rotating mechanism is used to execute corresponding first and second rotating actions according to the first and second control signals. In this embodiment, by controlling the rotating mechanism to execute the first and second rotating actions, the bending and twisting of the steel cage during the hoisting process can be reduced, thus ensuring the quality of the hoisting construction.

[0034] In this embodiment, the control module includes a judgment unit and a control signal generation unit; The signal input terminals of the judgment unit and the control signal generation unit are both connected to the signal output terminal of the preprocessing module. The signal output terminal of the judgment unit is connected to the signal input terminal of the control signal generation unit. The signal output terminal of the control signal generation unit is connected to the signal input terminal of the rotating mechanism. The judgment unit is used to judge and generate a first judgment signal based on the acquired bending amount signal and a preset bending threshold, and to judge and generate a second judgment signal based on the acquired twisting amount signal and a preset twisting threshold. The control signal generating unit is used to generate a first control signal based on a first judgment signal and an attitude signal, and to generate a second control signal based on a second judgment signal, an attitude signal, and a torsion signal. In this embodiment, the bending amount data in the generated bending amount signal is compared with a bending threshold. If the bending amount data is greater than a preset bending threshold, the judgment unit generates a first judgment signal. Similarly, based on the torsion signal and the torsion threshold, if the torsion amount data in the torsion signal is compared with the torsion threshold and the torsion amount data is greater than a preset torsion threshold, the judgment unit generates a second judgment signal. The above-mentioned generation of judgment signals after threshold comparison is a conventional technical means and will not be elaborated here.

[0035] In this embodiment, the generation of the first control signal and the second control signal must be based on the attitude signal. That is, when the control signal generating unit generates the first control signal, it needs to receive the inclined hanging attitude signal generated by the attitude processing unit and the first judgment signal generated by the judgment unit before generating the first control signal. The first control signal is used to control the rotating mechanism to perform the first rotation action. When the second control signal is generated, when the control signal generating unit generates the second control signal, it needs to receive the vertical attitude signal generated by the attitude processing unit and the second judgment signal generated by the judgment unit, as well as the torsion amount signal before generating the second control signal. The second control signal is used to control the rotating mechanism to perform the second rotation action.

[0036] In this embodiment, the judgment unit can control the output of the first judgment signal and the second judgment signal through two signal output pins. Different attitude signals can be defined by different voltage values. For example, a voltage of 0V corresponds to a horizontal attitude signal, 0.4V to a tilted attitude signal, and 0.8V to a vertical attitude signal. Of course, technicians can also define attitude signals in other ways, such as directly through signal pins; examples will not be elaborated here. When the control signal generation unit receives the first judgment signal output from the signal output pin of the judgment unit and receives the tilted attitude signal corresponding to a voltage of 0.4V, the control signal generation unit can then generate the corresponding first control signal. When generating the second control signal, since the rotation angles of the first and second motors are not fixed when the second control signal controls the rotating mechanism to perform the second rotation action, the generation of the second control signal also requires the use of the torsion angle data in the torsion signal. Before generating the second control signal, the control signal generating unit needs to receive the second judgment signal output from the signal output pin of the judgment unit, and also receive the vertical posture signal corresponding to a voltage value of 0.8V. Simultaneously, it generates the second control signal based on the torsion angle data in the torsion amount signal. In this embodiment, the torsion angle data can be represented by a linearly varying voltage value; that is, different voltage values ​​correspond to different torsion angle data. After obtaining the corresponding voltage value, the control signal generating unit can obtain the corresponding torsion angle data. Based on this torsion angle data, the control signal generating unit can generate and output the second control signal. The second control signal can control the motor rotation angle in the second rotation action using linear voltage simulation or step pulses. The above-mentioned control signal generation method is a conventional technique in the art and will not be described in detail here.

[0037] In this embodiment, when the rebar cage is in a horizontal position, the hoisting mechanism has not yet hoisted it, so there is no immediate problem of the rebar cage bending. The bending deformation of the rebar cage is due to its large weight and low rigidity during hoisting. Therefore, the rebar cage will only be in an oblique hoisting position when it bends. Furthermore, only by rotating the rebar cage in an oblique hoisting position can its bending be reduced. If the rebar cage is directly hoisted to an upright position, even if the rotating mechanism performs the first rotation action, it will be difficult to reduce its bending. Similarly, in this embodiment, when the second control signal is generated, the attitude signal needs to be an upright attitude signal. The excessive twisting of the rebar cage is caused by the rotating mechanism performing the first rotation action after the excessive bending occurs. Therefore, it is necessary to wait for the rotating mechanism to reduce and correct the bending of the rebar cage before correcting the twisting caused by the first rotation action. There is a causal relationship between the first and second control signals.

[0038] In this embodiment, the rotating mechanism includes a first motor and a second motor respectively disposed at both ends of the reinforcing cage and used to drive the reinforcing cage to rotate along its axial direction; Both the first motor and the second motor are stepper motors, which facilitates the control of the rotation angle; During the first rotation action, the first motor and the second motor rotate in the same direction; In the second rotation action, the first motor and the second motor rotate in opposite directions, and the rotation angle is half of the total twist angle in the twist signal. This can also reduce the rotation angle of the first motor and the second motor in a single rotation in the second rotation action, and achieve twist correction by multiple rotations.

[0039] In this embodiment, the first rotation action includes clockwise rotation and counterclockwise rotation. After the first motor and the second motor rotate 180° clockwise, the first motor and the second motor rotate 180° counterclockwise at the same time, and the above cycle is repeated. Between the clockwise and counterclockwise rotation actions of the first motor and the second motor, a pause is required to ensure that the upward bending part after flipping to the top can continue to fall, thus ensuring the bending correction effect of the steel cage. In the second rotation action, after the first motor and the second motor rotate in opposite directions, they need to be reset before repeating the second rotation action.

[0040] In this embodiment, the control module further includes a start / stop control unit, and the signal input terminal of the start / stop control unit is connected to the signal output terminal of the control signal generation unit; The signal output terminal of the start / stop control unit is connected to the signal input terminal of the hoisting mechanism; The start / stop control unit is used to generate a pause signal based on the first or second control signal. By setting the start / stop control unit, the rebar cage is made more stable during the rotation and straightening process, and new deformation will not occur due to the hoisting movement of the hoisting mechanism, which would make it difficult to detect and control the hoisting construction quality of the rebar cage.

[0041] In this embodiment, an alarm module is also included, and the signal input terminal of the alarm module is connected to the signal output terminal of the judgment unit. The warning module is used to output warning signals for excessive bending and excessive twisting based on the obtained first judgment signal and second judgment signal.

[0042] By setting up a warning module, it is convenient to warn on-site construction personnel and, when necessary, to perform operations such as reshaping the steel cage to ensure that the overall deformation of the steel cage after it is hoisted to an upright position meets the requirements.

[0043] In this embodiment, the rotating mechanism includes a first rotating component and a second rotating component respectively disposed at both ends of the reinforcing cage. The first rotating component and the second rotating component have the same structure. The first rotating component and the second rotating component respectively include a first motor and a second motor. The first rotating component and the second rotating component both include a rotating disk and a mounting disk. The first motor and the second motor are both mounted on the mounting disk. The end of the reinforcing cage is mounted on the rotating disk. The rotating disk and the mounting disk are coaxially rotatably connected. In this embodiment, the hook of the hoisting mechanism is hoisted on the mounting disk where the second motor is located.

[0044] In this embodiment, the first horizontal sensor and the second horizontal sensor are respectively mounted on two mounting plates, while the first angle sensor and the second angle sensor are respectively mounted on two rotating plates.

[0045] In this embodiment, after the steel cage is hoisted to an upright position and corrected by the second rotation action, the lowering action of the steel cage needs to be completed before the rotary-drilled cast-in-place pile is grouted into the pile hole.

[0046] Example 2: like Figure 3 As shown, this embodiment provides a method for controlling the quality of rebar cage hoisting, applicable to the rebar cage hoisting quality control system described in Embodiment 1 above, including the following steps: S1. Obtain the first signal from the bending detection mechanism and the second signal from the torsion detection mechanism; S2. Preprocess the first signal or the second signal to obtain a bending amount signal and an attitude signal based on the first signal, and a twist amount signal based on the second signal; The attitude signals include horizontal attitude signals, oblique hanging attitude signals, and vertical attitude signals; S3. Determine whether the bending amount of the steel cage exceeds the preset bending threshold. If so, generate the first judgment signal. Determine whether the twisting amount of the steel cage exceeds the preset twisting threshold. If so, generate the second judgment signal. S4. Generate a first control signal based on the inclined hanging attitude signal and the first judgment signal, or generate a second control signal based on the vertical attitude signal and the second judgment signal; S5. Control the first rotation of the steel cage based on the first control signal, or control the second rotation of the steel cage based on the second control signal.

[0047] Specifically, in this embodiment, in S4, based on the first judgment signal or the second judgment signal, a pause signal is also generated to control the suspension of the lifting mechanism's operation, ensuring that the overall rotation of the steel cage is relatively stable when the steel cage is driven to rotate by the rotating mechanism.

[0048] Specifically, in this embodiment, it also includes S6. If the first judgment signal or the second judgment signal is generated in S3, then a warning signal for excessive bending of the rebar cage and a warning signal for excessive twisting of the rebar cage are generated. This is to facilitate warning to on-site construction personnel and to perform operations such as reshaping of the rebar cage when necessary, so as to ensure that the overall deformation of the rebar cage after being hoisted to the upright position meets the requirements.

[0049] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A reinforcement cage lifting quality control system for use in the lifting phase prior to the lowering of a reinforcement cage, characterised in that, It includes a bending detection mechanism, a torsion detection mechanism, a rotation mechanism, a pretreatment module, a control module, and a hoisting mechanism, wherein: The signal output terminals of the bending detection mechanism and the torsion detection mechanism are connected to the signal input terminal of the preprocessing module. The signal output terminal of the preprocessing module is connected to the signal input terminal of the control module. The signal output terminal of the control module is connected to the signal input terminal of the rotating mechanism and the hoisting mechanism. The bending detection mechanism generates a first signal based on the bending deformation during the hoisting of the steel cage; The torsion detection mechanism generates a second signal based on the torsion deformation of the steel cage after it is hoisted to an upright position; The preprocessing module is used to generate bending amount signal, twisting amount signal and attitude signal based on the first signal and the second signal; The control module is used to generate corresponding control signals based on the signals generated by the preprocessing module; The rotating mechanism is used to perform corresponding rotating actions according to the acquired control signals.

2. The rebar cage hoisting quality control system according to claim 1, characterized in that, The bending detection mechanism includes several first horizontal sensors and second horizontal sensors located at both ends of the steel cage, respectively. The signal output terminals of both the first and second level sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a bending amount processing unit, which generates a bending amount signal based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The signal output terminal of the bending amount processing unit is connected to the signal input terminal of the control module.

3. The rebar cage hoisting quality control system according to claim 2, characterized in that, The preprocessing module also includes an attitude processing unit, the signal output terminal of which is connected to the signal input terminal of the control module. The attitude processing unit is used to generate attitude signals for hoisting the steel cage based on the first signal A output by the first horizontal sensor and the first signal B output by the second horizontal sensor. The attitude signals for hoisting steel cages include horizontal attitude signals, oblique hoisting attitude signals, and vertical attitude signals.

4. The rebar cage hoisting quality control system according to claim 1, characterized in that, The torsion detection mechanism includes several first angle sensors and second angle sensors located at both ends of the steel cage. The signal output terminals of both the first and second angle sensors are connected to the signal input terminal of the preprocessing module. The preprocessing module includes a torsion amount processing unit, which generates a torsion amount signal based on the second signal A output by the first angle sensor and the second signal B output by the second angle sensor. The signal output terminal of the torsion amount processing unit is connected to the signal input terminal of the control module.

5. The rebar cage hoisting quality control system according to claim 1, characterized in that, The control module is used to generate a first control signal based on the bending amount signal and the attitude signal, and to generate a second control signal based on the torsion amount signal and the attitude signal; The rotating mechanism is used to perform corresponding first rotating action and second rotating action according to the first control signal and the second control signal.

6. A rebar cage hoisting quality control system according to claim 5, characterized in that, The control module includes a judgment unit and a control signal generation unit; The signal input terminals of the judgment unit and the control signal generation unit are both connected to the signal output terminal of the preprocessing module. The signal output terminal of the judgment unit is connected to the signal input terminal of the control signal generation unit. The signal output terminal of the control signal generation unit is connected to the signal input terminal of the rotating mechanism. The judgment unit is used to judge and generate a first judgment signal based on the acquired bending amount signal and a preset bending threshold, and to judge and generate a second judgment signal based on the acquired twisting amount signal and a preset twisting threshold. The control signal generating unit is used to generate a first control signal based on a first judgment signal and an attitude signal, and to generate a second control signal based on a second judgment signal, an attitude signal, and a torsion signal.

7. A rebar cage hoisting quality control system according to claim 5, characterized in that, The rotating mechanism includes a first motor and a second motor respectively disposed at both ends of the steel cage and used to drive the steel cage to rotate along its axial direction. Both the first motor and the second motor are stepper motors; During the first rotation action, the first motor and the second motor rotate in the same direction; In the second rotation action, the first motor and the second motor rotate in opposite directions, and the rotation angle is half of the total twist angle in the twist signal.

8. A rebar cage hoisting quality control system according to claim 7, characterized in that, The first rotation action includes clockwise rotation and counterclockwise rotation. After the first motor and the second motor both rotate 180° clockwise, the first motor and the second motor simultaneously rotate 180° counterclockwise, and the above cycle is repeated. In the second rotation action, after the first motor and the second motor rotate in opposite directions, they need to be reset before repeating the second rotation action.

9. A rebar cage hoisting quality control system according to claim 6, characterized in that, The control module also includes a start / stop control unit, the signal input terminal of which is connected to the signal output terminal of the control signal generation unit. The signal output terminal of the start / stop control unit is connected to the signal input terminal of the hoisting mechanism; The start / stop control unit is used to generate a pause signal based on the acquired first control signal or second control signal.

10. A method for quality control of steel cage hoisting, applicable to the steel cage hoisting quality control system described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Obtain the first signal from the bending detection mechanism and the second signal from the torsion detection mechanism; S2. Preprocess the first signal or the second signal to obtain a bending amount signal and an attitude signal based on the first signal, and a twist amount signal based on the second signal; The attitude signals include horizontal attitude signals, oblique hanging attitude signals, and vertical attitude signals; S3. Determine whether the bending amount of the steel cage exceeds the preset bending threshold. If so, generate the first judgment signal. Determine whether the twisting amount of the steel cage exceeds the preset twisting threshold. If so, generate the second judgment signal. S4. Generate a first control signal based on the inclined hanging attitude signal and the first judgment signal, or generate a second control signal based on the vertical attitude signal and the second judgment signal; S5. Control the first rotation of the steel cage based on the first control signal, or control the second rotation of the steel cage based on the second control signal.

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