DH-L105AJE microcomputer controlled scaffold fastener testing machine

Main purpose and scope of application
The DH-L105AJE microcomputer controlled scaffold fastener testing machine produced by our company is mainly suitable for testing the mechanical properties of anti slip, anti damage, torsional stiffness, tensile and compressive strength of right angle fasteners, rotary fasteners, docking fasteners and bases for steel pipe scaffolds with an outer diameter of 48.3mm in construction projects. The precise automatic control and data acquisition system enables fully digital adjustment of the data acquisition and control process. It can complete the testing of technical indicators such as high load-bearing capacity, tensile strength, elongation deformation, and elongation rate. After the experiment is completed, the above detection parameters will be automatically calculated by the computer based on the experimental parameter conditions set at the beginning of the experiment, and the corresponding experimental results will be displayed. Each detection parameter can be queried and displayed after the experiment is completed, or connected to a printer for printing and output.

Product performance characteristics
The control and data processing software based on database technology using Windows as the operating platform adopts virtual instrument technology instead of traditional digital tubes and oscilloscopes, realizing the screen display of test force, peak test force, beam displacement, sample deformation, and test curve. All test operations can be completed on the computer screen by mouse input, with a good human-machine interface and easy operation;
The dual channel fully digital programmable amplifier inserted into the PC realizes true physical zeroing, gain adjustment, and automatic shifting, zeroing, and calibration of test force measurement, without any analog adjustment links. The control circuit is highly integrated, completely eliminating mechanical adjustment devices such as potentiometers, with a simple structure and reliable performance.
The comprehensive application of the above technologies ensures that the DH-L105AJE microcomputer controlled scaffold fastener testing machine can achieve closed-loop control of parameters such as test force, specimen deformation, and beam displacement, and can perform tests such as constant force, constant displacement, constant strain, constant velocity load cycle, and constant velocity deformation cycle.
Users can use the PC expert system to independently set control modes such as constant stress, constant strain, and constant displacement, and smoothly switch between various control modes. We have achieved data processing that complies with various standards such as GB, ISO, JIS, ASTM, DIN, etc., especially with good scalability. The processing results can be stored on disk in ASCII code format. This provides convenience for post-processing such as reanalysis of experimental data, database management, and network transmission.
Due to the DH-L105AJE microcomputer controlled scaffold fastener testing machine achieving automatic control of the testing process and information processing of the test results, it allows operators to conveniently and autonomously set the test program control steps. During the tensile test, the tester can clearly observe the entire testing process of low carbon steel, cast iron, etc. By repeatedly loading on different curve segments, the force displacement (deformation) curve can be used to intuitively verify Hooke's law and observe the phenomenon of cold work hardening. For materials without obvious physical yielding phenomenon, hysteresis loop method or stepwise approximation method can be used to determine the specified non proportional tensile strength. During the compression process, it is convenient to observe the yielding and strengthening phenomena of low carbon steel, as well as the compression failure process and fracture shape of cast iron. It can also detect the n-value and r-value of mechanical materials.
The DH-L105AJE microcomputer controlled scaffold fastener testing machine produced by our company combines advanced foreign control technology, exquisite appearance design, and high-efficiency transmission system to form a high-performance host. The control system adopts the world's popular high-speed PCI2.2 standard parallel bus design, and uses BB Company's amplifier, AD Company's high-speed analog-to-digital converter, and CPLD to form a data acquisition system. The high-precision load sensor forms the measurement system. The software is written in popular languages such as C.NET, which is easy and fast to upgrade.
The professional software of the testing machine can realize data and indicators such as yield strength (Fe) and tensile strength (Rm). The computer control system controls and processes the testing process in accordance with the requirements of the corresponding national standards for metal and non-metal materials. The test reports are diversified in various ways such as WORD, EXECEL, etc.
The DH-L105AJE microcomputer controlled scaffold fastener testing machine is suitable for testing the mechanical performance indicators of various metal, non-metal, and composite materials, fully meeting the requirements of relevant national standards. This machine is widely used for material inspection and analysis in industries such as building materials, aerospace, machinery manufacturing, wire and cable, rubber and plastic, automotive manufacturing, and shock absorption systems. It is an ideal testing equipment for scientific research institutions, colleges and universities, industrial and mining enterprises, technical supervision, and commercial inspection and arbitration departments.

According to the standard
1) GB/T2611-2007 General Technical Requirements for Testing Machines
2) GB/T228-2010 "Tensile Test Method for Metallic Materials at Room Temperature"
3) GB/T16491-2008 "Electronic Universal Material Testing Machine"
4) JJF1103-2003 "Evaluation of Computer Data Acquisition System for Universal Testing Machine"
5) GB/T16825-1997 "Inspection of Tensile Testing Machines"
6) GB15831-2006 "Steel Pipe Scaffold Fasteners"
7) GB24910-2010 "Steel Plate Stamping Fasteners"
9) JJG139-2014 "Tensile, Pressure and Universal Testing Machine"

Key description
Host: The machine adopts a dual space door structure, with the upper space stretched and the lower space compressed and bent, and the crossbeam infinitely adjustable. The transmission part adopts circular arc synchronous toothed belt and screw pair transmission, which ensures smooth transmission and low noise. The specially designed synchronous toothed belt reduction system and precision ball screw pair drive the movement of the testing machine's moving crossbeam, achieving seamless transmission.
Electrical part: The electrical part consists of a servo system and a display measurement system. This machine uses servo motors and servo systems, and controls the accuracy of the servo motor's forward and reverse rotation and speed through a speed control system. The load measurement system consists of a high-precision load sensor, measurement amplifier, A/D converter, and regulated power supply. The displacement measurement system consists of a photoelectric encoder, a pulse width shaping circuit, a frequency doubling circuit, and a counting circuit. The controller is directly plugged into the computer slot. All control parameters and measurement results can be displayed in real-time on the screen.
Limit switch: installed on the side of the host as a safety measure, it can prevent the occurrence of overload caused by collision when the middle crossbeam moves, such as damaging the sensor or even bending the crossbeam.
Data processing: The data collected by the PC system through the controller is displayed on the screen and saved in real-time in the computer memory in the background. After the experiment is completed, the user can process the data, and the processing results can be printed and recorded, or saved in real-time in the form of an Access file on the hard drive for future data reanalysis and network operations.
Attachment: Configuration: Right angle and rotating fasteners, anti slip and anti damage; Torsional stiffness; Tensile strength of docking fasteners; One set of pressure resistant base for each
Electrical measurement and control system:
(1) Adopting AC servo drivers and AC servo motors, the performance is stable and reliable, with protection devices for overcurrent, overvoltage, overspeed, overload, etc. The speed ratio can reach 1:100000.
(2) It has protection functions such as overload, overcurrent, overvoltage, displacement upper and lower limits, and emergency stop.
(3) Our company, in collaboration with Shandong University, Jinan University, Zhejiang University, and Lianchuang, has developed a built-in controller to ensure that the testing machine can achieve closed-loop control of parameters such as test force, specimen deformation, and beam displacement. It can also perform tests such as constant velocity test force, constant velocity displacement, constant velocity strain, constant velocity load cycle, and constant velocity deformation cycle. Smooth switching between various control modes is possible.
(4) At the end of the experiment, it can be manually or automatically returned to the initial position of the experiment at high speed.
(5) It has achieved true physical zeroing, gain adjustment, and automatic shifting, zeroing, calibration, and saving of experimental force measurement, without any analog adjustment links, and the control circuit is highly integrated.
(6) The electrical control circuit follows international standards and complies with national testing machine electrical standards. It has strong anti-interference ability, ensuring the stability of the controller and the accuracy of experimental data.
(7) Equipped with a network interface, it can transmit, store, print records, and perform network transmission printing of data, and can be connected to the internal LAN or Internet of the enterprise.
Description of the main functional features of the software:
This measurement and control software is used for microcomputer controlled electronic universal testing machines to conduct various metal and non-metal (such as artificial boards, etc.) tests, completing real-time measurement and display, real-time control and data processing, result output and other functions according to corresponding standards.
(1) Permission based management, where operators at different levels have different operational permissions and access to menus and other content. This not only simplifies, facilitates, and speeds operations for ordinary operators, but also effectively protects the system;
(2) Real time measurement and display of test force, peak value, displacement, deformation and other signals; Real time acquisition and control have been achieved on NT mode platforms such as Win2000 and WinXP; And achieved * * timing and high-speed sampling;
(3) Real time screen display of various test curves such as load deformation and load displacement has been achieved, which can be switched and observed at any time. The zooming in and out of the curves is very convenient;
(4) The computer has functions such as storing, setting, and loading experimental parameters. Zeroing, calibration, and other operations are carried out through software, and each parameter can be easily stored and imported, making it easy to switch between multiple sensors on a host without any limit on the number of sensors;
(5) Support multiple control methods, including open-loop constant velocity displacement, constant velocity force, constant velocity stress, and other closed-loop control methods; And provide standard reference curves during the debugging process of closed-loop parameters by the upper level operator, so that users can actually observe the impact of each parameter on the closed-loop effect.
(6) Equipped with an intelligent expert system for setting experimental process control modes, providing professional users with automatic programmable programmers. Users can flexibly combine multiple control methods and control speeds according to actual needs and rules, and develop control programs that suit their needs. The measurement and control software will automatically control the testing process according to user settings.
(7) Analyze data through human-computer interaction. It can automatically calculate various performance parameters such as elastic modulus, yield strength, and specified non proportional tensile strength, and can also manually intervene in the analysis process to improve the accuracy of analysis; Other data processing can also be carried out according to the standards provided by the user.
(8) The experimental data is stored in text files for easy user queries, and can be further processed using any general commercial report or word processing software, while also facilitating data transmission through the internet;
(9) It can record and save the data curve of the entire experimental process, and has a demonstration function to reproduce the experimental curve. Curve overlay comparison can also be performed for easy comparative analysis;
(10) The test report can be printed in the format required by the user. Users can choose the content of the report output basic information, experimental results, and experimental curves to meet various needs;
(11) The digital zeroing and automatic calibration of experimental force and deformation have been achieved, which facilitates operation and improves the reliability of the machine. Various parameter system settings are stored in file form for easy saving and recovery;
(12) Can be applied to various operating systems such as Win98, Win2000, WinXP, etc. The control of the experimental process, changes in the speed of the crossbeam movement, parameter input, and other operations can all be completed using a keyboard or mouse, making it convenient and fast to use;
(13) It can automatically recognize and support external jog control, making it convenient to clamp the sample;
(14) Equipped with overload protection and automatic shutdown function, it can automatically detect sample fracture and automatically shut down.
According to different user requirements, the above software functions may be adjusted or modified.

Specification
The machine is manufactured in full accordance with national standards GB/T16491-2008 "Electronic Universal Testing Machine", GB2611-2007 "General Technical Requirements for Testing Machines", JJF1103-2003 "Evaluation of Computer Data Acquisition System for Universal Testing Machines", and GB/T16825-1997 "Inspection of Tensile Testing Machines". It fully complies with standards such as GB/T228-2010 "Tensile Test Method for Metallic Materials at Room Temperature", GB/T7314-2005 "Compression Test Method for Metallic Materials at Room Temperature", GB/T14452-1993 "Test Method for Bending Mechanical Properties of Metallic Materials", GB/T15831-2006 "Steel Pipe Scaffolding Fasteners", GB 24911-2010 "Bowl Buckle Steel Pipe Scaffolding Components", etc. At the same time, it can conduct tests and data processing according to GB, ISO, JIS, ASTM, DIN and various standards provided by users.

system configuration