An intelligent ecological rivet puller system

Abstract

The present invention discloses an intelligent ecological rivet drawing instrument system, belonging to the technical field of rivet drawing tests. It includes a drawing block, which is connected to a tension sensor. The top of the tension sensor is connected to a screw jack; the tension sensor is connected to a controller, and the controller communicates with a host computer. An input unit, a drawing control unit, a calculation unit, and an output unit are set in the host computer. The input unit transmits the tension value collected by the tension sensor to the drawing control unit. The drawing control unit collects the actual wind speed data of previous years and transmits it to the calculation unit. The calculation unit converts the wind speed data into a force value as model data, and analyzes and calculates according to the collected tension value, model data, and the change law corresponding to the wind speed, and obtains the final target tension value and transmits it to the output unit, and conducts a drawing test according to the final target tension value.

Description

Technical Field

[0001] The present invention belongs to the technical field of rivet pulling test, and particularly relates to an intelligent ecological rivet pulling instrument system. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] At present, for the devices used to detect the pulling force of rivets for fixing thermal insulation materials in construction projects, most of them have simple structures, complex operations, and low intelligent levels. When operating, the operator needs to hold the device body with one hand and turn the handle with the other hand, and the handle is set at the top of the device, which is not very convenient to turn in some cases. Manually turning the handle results in low test accuracy. When conducting a pulling test, some rivets need to be pulled thousands or tens of thousands of times, which greatly increases the labor intensity of the test personnel and severely restricts the development of the building exterior wall insulation industry. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an intelligent ecological rivet pulling instrument system, which can realize the intelligent ecological rivet pulling function, replace the traditional manual pulling operation, and solve the problems of low accuracy, high labor intensity, and low intelligent level in the traditional pulling test.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In the first aspect, the present invention provides an intelligent ecological rivet pulling instrument system, including a pulling block, the pulling block is connected to a tension sensor, and the top of the tension sensor is connected to a screw jack; the tension sensor is connected to a controller, the controller communicates with a host computer, and an input unit, a pulling control unit, a calculation unit, and an output unit are set in the host computer. The input unit transmits the tension value collected by the tension sensor to the pulling control unit. The pulling control unit collects the actual wind speed data of previous years and transmits it to the calculation unit. The calculation unit converts the wind speed data into a force value as model data, and analyzes and calculates according to the collected tension value, model data, and the change law corresponding to the wind speed, and transmits the final target tension value to the output unit, and conducts a pulling test according to the final target tension value.

[0007] As a further technical solution, the calculation unit obtains the corresponding force value and change law according to the actual wind speed data, compares the force value obtained from the collected tension value and the actual wind speed data, obtains the position of the currently collected tension value in the change law, and determines the tension value for the next test according to the change law situation, that is, the final target tension value.

[0008] As a further technical solution, the ultimate target pulling force value is fed back to the input unit through data compensation by the neuro-fuzzy control unit to form a closed-loop control system.

[0009] As a further technical solution, the calculation unit obtains the air density ro according to the air specific weight and the relationship between the air density ro and the specific weight r, i.e., r = ro·g, and obtains the wind pressure value according to the wind speed by wp = 0.5·ro·v2, and then obtains the force value corresponding to the wind speed according to the corresponding area conversion; where wp is the wind pressure and v is the wind speed.

[0010] As a further technical solution, the pulling block is set to a C-shaped structure, with a groove in the middle and an opening at the bottom.

[0011] As a further technical solution, the screw jack is connected to the screw jack connection flange, and the screw jack connection flange is connected to the tension sensor.

[0012] As a further technical solution, the screw jack connection flange is provided with a limit sensor, and the limit sensor is connected to the controller.

[0013] As a further technical solution, the tension sensor is connected to the eyebolt, the bottom of the eyebolt is connected to the quick connection ring, and the quick connection ring is connected to the pulling block through the pulling block connector.

[0014] As a further technical solution, the screw jack is connected to the motor, the motor is connected to the motor driver, and the motor driver is connected to the controller.

[0015] As a further technical solution, the screw jack is fixed to the pulling instrument support structure, and the pulling instrument support structure is set to an N-shaped structure.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention adopts an S-type tension sensor and PWM pulse width modulation technology to achieve accurate acquisition of tension data and stepless speed regulation functions for the motor direction and speed, improving the accuracy and stability of the pulling test.

[0018] The present invention designs a main control system for the pulling instrument, proposes an automatic pulling control technical solution, realizes the full-automatic pulling function of the pulling instrument after setting the test data, avoids the manual pulling process every time, reduces the labor intensity of the operator and simplifies the cumbersome process of the pulling test.

[0019] The present invention proposes an intelligent ecological control algorithm. By collecting actual wind speed data, performing data processing and analysis, and automatically generating a pulling force value simulating the actual wind speed, it realizes the observation of the pulling effect of the rivet under the actual wind force in the actual environment in the laboratory, improving the practicality of the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The attached drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0021] Figure 1 is a schematic structural diagram of the intelligent ecological drawing instrument of the present invention;

[0022] Figure 2 is an electrical framework diagram of the intelligent ecological drawing instrument of the present invention;

[0023] Figure 3 is a schematic diagram of the control panel of the intelligent ecological drawing instrument of the present invention;

[0024] Figure 4 is a program flow chart of the intelligent ecological drawing instrument of the present invention;

[0025] Figure 5 is an algorithm flow chart of the intelligent ecological drawing instrument of the present invention;

[0026] In the figures: the distances or sizes between each part are exaggerated for showing the positions of each part, and the schematic diagrams are only for illustration;

[0027] Among them, 1 is the drawing block, 2 is the drawing block connecting piece, 3 is the quick connecting ring, 4 is the eye bolt, 5 is the tension sensor, 6 is the lead screw elevator connecting flange, 7 is the limit sensor, 8 is the lead screw elevator, 9 is the motor connecting flange, 10 is the motor, 11 is the drawing instrument support structure; 12 is the emergency stop switch, 13 is the power switch, 14 is the manual / automatic mode switching switch, 15 is the decrease button, 16 is the increase button, 17 is the setting button, 18 is the clear button, 19 is the usage instruction, 20 is the automatic mode indicator light, 21 is the power indicator light, 22 is the display screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It should be noted that the following detailed descriptions are all illustrative and are intended to provide a further description of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0029] In a typical embodiment of the present invention, as Figure 1 shown, an intelligent ecological rivet drawing instrument system is proposed, which includes a drawing instrument support structure 11, a lead screw elevator 8, a drawing block 1, etc., and the lead screw elevator 8 is fixed to the drawing instrument support structure 11.

[0030] The lead screw lift 8 rotates through a worm gear and a worm to achieve the up and down linear motion of the lead screw. An anti-rotation groove is designed on the lead screw to prevent the lead screw from rotating by itself during the up and down movement. The power system of the lead screw lift comes from the motor 10, and the motor 10 is connected to the lead screw lift 8 through the motor connection flange 9; the motor connection flange 9 transmits the power of the motor to the lead screw lift. The motor connection flange 9 and the motor 10 are fastened with stud nuts. In this embodiment, the motor 10 is a DC brush motor, and the up and down movement of the lead screw lift is realized by the forward and reverse rotation of the motor. The worm gear and worm mechanism adopted by the lead screw lift has a self-locking function, ensuring the stability of the pulling force data during the operation. The motor 10 is powered by 24V, and the reduction part adopts a planetary reducer, supporting forward and reverse rotation. The DC brush motor is driven by a solid-state relay, and the PWM pulse width modulation technology is used to adjust the motor speed, realizing fast rotation at the start of pulling or during empty pulling in the pulling process, and slow rotation when the pulling force value is close to the set value, improving the accuracy of the pulling data.

[0031] The pulling instrument support structure 11 is made of 4040 industrial aluminum alloy profiles and is designed in an N-shaped structure form, which is convenient to provide support during rivet pulling. Both the motor and the lead screw lift are installed on the pulling instrument support structure.

[0032] The lead screw lift 8 is connected to the lead screw lift connection flange 6, and the lead screw lift connection flange 6 is connected to the tension sensor 5. The lead screw lift connection flange 6 is used for the transmission of the pulling force during the pulling process, and the tension sensor 5 is used to detect the magnitude of the pulling force on the lead screw lift in real time. The tension sensor 5 is connected to the eye bolt 4, and the bottom of the eye bolt 4 is connected to the quick connection ring 3. The quick connection ring 3 is connected to the pulling block 1 through the pulling block connector 2.

[0033] The tension sensor 5 can adopt an S-type tension sensor, with a working voltage of 10V, a working current of 2A, a sensitivity of 2 ± 0.05 mV / V. The signal acquisition of the data acquisition part uses a 24-bit A / D converter chip. This chip has two differential inputs, an on-chip low-noise programmable amplifier, and an on-chip voltage regulator circuit that can directly supply power to external sensors and the on-chip A / D converter. The on-chip clock oscillator does not require any external devices and can be automatically reset when powered on. Before each operation, the tension sensor is zeroed when not under force, and then the pulling operation is carried out to ensure the accuracy of the pulling data.

[0034] The eye bolt 4 is used to connect the quick connection ring, facilitating the connection between the sensor and the outside. The eye bolt also adopts stainless steel 304 material to extend the service life of the equipment.

[0035] The quick connection ring 3 is oval-shaped and is mainly used to connect the eyebolt and the pulling block connector, facilitating the quick replacement of the pulling block by the pulling instrument according to different pulling tasks. During the pulling operation, ensure that the quick connection ring is in a loose state with the pulling block connector and the eyebolt. At this time, the tension sensor is not stressed, and the pulling instrument automatically performs the zero-clearing function.

[0036] The pulling block connector 2 is installed at the upper end of the pulling block and is used to connect the quick connection ring, facilitating the replacement of the pulling block. The pulling block connector is made of stainless steel 304 material to prevent the equipment from rusting in a harsh environment for a long time and extend the service life of the equipment.

[0037] Both the pulling block connector 2 and the eyebolt 4 can be in a ring structure.

[0038] The pulling block 1 is used to connect the pulling instrument to the rivet. The pulling block is set in a C-shaped structure, with a groove in the middle and an opening at the bottom, facilitating the rivet to be pulled to be caught in the groove and placed into the pulling block. During the pulling operation, the rivet enters from the opening of the pulling block and stops when it is at the center of the pulling block, ensuring that the rivet is evenly stressed during the pulling operation.

[0039] The lead screw lift connecting flange 6 is provided with a limit sensor 7. The limit sensor 7 uses a YBLX-ME-8108 limit switch, which mainly functions as a limit protection. When the pulling instrument is performing a pulling test and the rivet is pulled out, it can automatically detect whether the pulling mechanism reaches the limit position and has a protection function at the limit position. When the lead screw lift reaches the top, it triggers the limit sensor, and the limit sensor transmits a signal to the controller, and the controller controls the motor to stop running to protect the equipment from damage.

[0040] Among them, the tension sensor 5, the limit sensor 7, and the motor 10 are all in communication with the controller. The controller receives the corresponding signals and controls the actions of the motor, etc.; the tension sensor 5 outputs an analog signal, and the analog signal is transmitted to the controller. In this embodiment, the controller uses an ARM controller, and the ARM controller uses an STM32F407VGT6 chip. The circuit is designed with isolated input and output, a surge protection circuit, pluggable terminal blocks, and uses a UCOSIII operating system and a 485 communication system to realize functions such as the logical motion control of the motor, the acquisition of sensor data, and the display on the display screen.

[0041] The controller is connected to the power supply module. The power supply module includes a 220V to 24V switching power supply module, a 24V to 12V power supply module URB2412S-6WR3, and a 12V to 5V power supply module 7805. The LM1117I-3.3 power supply module is used to achieve the conversion of 5V to 3.3V power. The 220V switching power supply mainly converts the commercial power into the common power supply. The 24V power supply is mainly used to provide power for the DC brush motor. The 12V power supply is mainly used for the power input of the ARM controller and the power supply of some sensors. The 5V power supply is used for the power supply of some sensors. The 3.3V power supply is mainly used for the power supply of some chips on the main control board of the ARM controller.

[0042] The controller is connected to the motor driver of the motor 10. That is, the motor 10 is connected to the motor driver, the motor driver is connected to the controller. The motor driver is driven by a solid-state relay. Anti-interference, overcurrent protection, no-spark, and stability designs are implemented to enable the pulling instrument to have the function of forward and reverse rotation. The PWM (Pulse Width Modulation) technology is used to achieve the stepless speed regulation function of the motor speed.

[0043] The controller is also connected to the display module. The display module includes two parts: a 12864 liquid crystal display module and a digital tube display module. The liquid crystal display module serves as the human-machine interaction interface. The operator can set some system parameters through the liquid crystal and button module, such as the working mode of the pulling instrument, the pulling force magnitude, the number of pulling times, and other functions. The 12864 liquid crystal display module is directly driven by the ARM pins and has the function of automatic backlight adjustment. The digital tube display module is a 6-digit common cathode digital tube, and the driving chip uses two 74HC573 chips for driving, which is mainly used for system function debugging, displaying system function parameters and debugging parameters.

[0044] Such as Figure 3The figure shows a schematic diagram of the control panel of the intelligent ecological rivet pulling instrument system. The control panel is provided with an emergency stop switch 12. When abnormal conditions occur in the equipment, press the emergency stop switch immediately, and all moving mechanisms will stop. A power switch 13 is provided to control the normal startup and shutdown of the system. A manual-automatic mode switching switch 14 is provided. When the switch is turned to the left, the control mode of the equipment is manual control. When the switch is turned to the right, the control mode of the equipment is switched to automatic control. A decrease button 15 is provided. In manual mode, it can control the pulling instrument to reverse and unload the pulling force. When setting parameters in the setting mode, the value will be decreased. An increase button 16 is provided. In manual mode, it can control the pulling instrument to rotate forward and load the pulling force. When setting parameters in the setting mode, the value will be increased. A button 17 is provided for mode switching, which is used to switch the working operation mode, setting mode, and the switching function of each parameter setting state. A clear button 18 is provided. After each pulling test is completed, the pulling times will be cumulatively increased by one. If a new test is to be started, the previous data needs to be cleared, and this button can be pressed to achieve this. A usage instruction 19 is provided. A usage instruction is written on the control panel to introduce the usage method of the instrument equipment. An automatic mode indicator light 20. When the equipment is working in automatic mode, this indicator light is on. When in manual mode, this indicator light is off. A power indicator light 21. When the equipment is powered on, the power indicator light will light up. A display screen 22. The content displayed on the display screen includes whether the working mode of the equipment is manual or automatic, the real-time pulling force value, the set pulling force value, the cumulative pulling times, etc.

[0045] Such as Figure 4 The figure shows the program flow chart of the intelligent ecological rivet pulling instrument system. The program flow is to first perform initialization, including liquid crystal initialization, timer initialization, and AD acquisition module initialization (the pulling force sensor outputs an analog signal, and the analog quantity is converted into a digital quantity through the AD acquisition module). After initialization is completed, it is judged whether it is the working mode. If it is the working mode, then it is judged whether it is the automatic mode or the manual mode. If it is the automatic mode, the AD value is read in real time (the pulling force of the lead screw lift can be obtained), and after reading the AD data, intelligent ecological calculation is performed and comprehensively compared and analyzed with the actual wind speed data to calculate a new pulling force data value, and the keys are scanned in real time. If a key is pressed, key processing will be performed. If in the previous step it is not the automatic mode but the manual mode, then manual pulling or manual loosening will be performed, and the two pulling methods facilitate the operators to handle flexibly.

[0046] In this process, the pulling force value read by the AD acquisition module is compared with the force corresponding to the actual wind speed data. According to the current pulling force value, the force value corresponding to the wind speed, and the change law, the pulling force value for the next test is calculated.

[0047] At the beginning of the program, if it is not in the working mode and is in the setting mode, then traverse the three working modes of setting the pulling force magnitude, clearing the cumulative count, and setting the working method to check which operation it is. Setting the pulling force magnitude is to input the data required for the test through the panel buttons. Clearing the cumulative count is to clear the data of the cumulative pulling times to facilitate re-counting at the start of the next pulling test. Setting the working mode can set various states such as whether the intelligent ecological pulling instrument is in the working mode or the setting mode.

[0048] In this system, an intelligent ecological control algorithm is adopted. The intelligent ecological control algorithm is a pulling method based on simulated wind speed. It collects actual wind speed data, conducts data processing and analysis, and based on the fuzzy control algorithm of neural network, conducts data compensation feedback to automatically generate the pulling force value simulating the actual wind speed.

[0049] As Figure 5 shown, in this system, the controller communicates with the host computer. In the host computer, there are an input unit, a pulling control unit, a calculation unit, a neural fuzzy control unit, and an output unit. The input unit transmits the collected pulling force value to the pulling control unit. The pulling control unit collects the actual wind speed data of previous years and transmits it to the calculation unit. The calculation unit has an intelligent control algorithm. The calculation unit converts the wind speed data per unit area into a force value as model data according to the corresponding relationship. The intelligent control algorithm analyzes and calculates based on the collected pulling force value, model data, and the changing rule corresponding to the wind speed, and obtains the final target pulling force value to be transmitted to the output unit. The pulling test is carried out according to the final target pulling force value output.

[0050] The pulling force sensor in the pulling instrument collects the pulling force value and transmits the pulling force value to the controller. The controller transmits the pulling force value to the input unit.

[0051] The intelligent control algorithm obtains the corresponding force value and changing rule according to the actual wind speed data. The force value obtained from the collected pulling force value and the actual wind speed data is compared to obtain the position of the currently collected pulling force value in the changing rule, and the pulling force value for the next test is determined according to the changing rule situation, that is, the final target pulling force value. The pulling instrument conducts a pulling test according to the final target pulling force value to simulate the actual wind speed rule, and tries to be close to the actual wind speed force value and the changing rule.

[0052] The final target pulling force value is compensated and fed back to the input unit through the neural fuzzy control unit to form a closed-loop control system. Since the expected pulling force value and the actual value may not be the same, the neural fuzzy control unit compensates the data (increases or decreases) according to the final target pulling force value to make the actual pulling force value consistent with the expected value.

[0053] The calculation unit uses the STM32F407VGT6 chip to process the data through Fourier transform calculation, and finally converts the continuously measured wind speed signal into an infinite superposition of sine wave signals with different frequencies to achieve the calculation result of the final target tensile force value.

[0054] The formula used here is: wp = 0.5·ro·v2. Where wp is the wind pressure [kN / m 2 , ro is the air density [kg / m 3 , and v is the wind speed [m / s].

[0055] Since the relationship between the air density (ro) and the specific weight (r) is r = ro·g, so ro = r / g. Using the formula, we can get: wp = 0.5·r·v2 / g.

[0056] This formula is the standard wind pressure formula. Under the standard state (atmospheric pressure is 1013 hPa, temperature is 15 °C), the specific weight r = 0.01225 [kN / m 3 , and the acceleration due to gravity g = 9.8 [m / s2] at a latitude of 45°. Then ro can be obtained. Substituting the wind speed data into the formula, the wind pressure value can be obtained, and then the force value can be calculated according to the corresponding area.

[0057] The intelligent ecological rivet pulling system is the first of its kind in the building exterior wall thermal insulation pulling test. It not only has a positive transformative effect on the building exterior wall thermal insulation industry, but also will surely improve the automation and intelligent levels of the building exterior wall thermal insulation industry, accumulating valuable technical data and on-site actual operation experience. It is the beginning of the intelligent development of building exterior wall thermal insulation and also a technological innovation in the building exterior wall thermal insulation industry.

[0058] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent ecological rivet pulling instrument system, characterized in that It includes a drawing block, which is connected to a tensile force sensor. The top of the tensile force sensor is connected to a screw jack. The tensile force sensor is connected to a controller, and the controller communicates with a host computer. An input unit, a drawing control unit, a calculation unit, and an output unit are set in the host computer. The input unit transmits the tensile force value collected by the tensile force sensor to the drawing control unit. The drawing control unit collects the actual wind speed data of previous years and transmits it to the calculation unit. The calculation unit converts the wind speed data into a force value as model data, and analyzes and calculates based on the collected tensile force value, model data, and the corresponding change law of the wind speed to obtain the final target tensile force value and transmit it to the output unit, and conducts a drawing test according to the final target tensile force value. The screw jack adopts a worm and worm gear mechanism, and an anti-rotation groove is designed on the screw. The calculation unit obtains the corresponding force value and change law according to the actual wind speed data, compares the force value obtained from the collected tensile force value and the actual wind speed data, obtains the position of the currently collected tensile force value in the change law, and determines the tensile force value for the next test according to the change law situation, that is, the final target tensile force value. The final target tensile force value is fed back to the input unit through a neural fuzzy control unit for data compensation to form a closed-loop control system.

2. The intelligent ecological rivet drawing instrument system according to claim 1, characterized in that, The calculation unit obtains the air density ro according to the relationship r = ro·g between the air density ro and the specific weight r, and obtains the wind pressure value from wp = 0.5·ro·v2 according to the wind speed, and then obtains the force value corresponding to the wind speed according to the corresponding area conversion. Where wp is the wind pressure and v is the wind speed.

3. The intelligent ecological rivet drawing instrument system according to claim 1, characterized in that, The drawing block is set in a C-shaped structure, with a groove in the middle and an opening at the bottom.

4. The intelligent ecological rivet pulling instrument system according to claim 1, characterized in that, The screw jack is connected to a screw jack connection flange, and the screw jack connection flange is connected to the tensile force sensor.

5. The intelligent ecological rivet drawing instrument system according to claim 4, characterized in that, The screw jack connection flange is provided with a limit sensor, and the limit sensor is connected to the controller.

6. The intelligent ecological rivet pulling instrument system according to claim 1, characterized in that, The tensile force sensor is connected to a ring screw, the bottom of the ring screw is connected to a quick connection ring, and the quick connection ring is connected to the drawing block through a drawing block connector.

7. The intelligent ecological rivet pulling instrument system according to claim 1, characterized in that, The screw jack is connected to a motor, the motor is connected to a motor driver, and the motor driver is connected to the controller.

8. The intelligent ecological rivet pulling instrument system according to claim 1, characterized in that, The screw jack is fixed to the drawing instrument support structure, and the drawing instrument support structure is set in an N-shaped structure.

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