Fictitious instrument technology detects in the car medium application

Test system is complex and contemporary car is giant, in single work go up, need checks pilot parameter to often amount to a few. Car connecting rod 3 labour nut turns the one share that detecting closely is this multifarious system automatically, it is automobile shock absorber is produced in large quantities of quantities, when assembling piston staff, its the nut of the head screws after standard moment of force, make piston lever head closely nut locking force carries changeless special device v hoe. In old some system, often be measure by what cover an area of area huge to check equipment to realize onefold parameter accuse. For example, change the 3 industry before making pull close testing instrument automatically, need ark of a great opportunity, the setting on face plate has a lot of button (be like: Start, test, print etc) with signal lamp, monitor, the operation is complex, the function is single. Fictitious the test instrument after changing, need to contain only inside the PC that buy type DAQ blocks, all function key, monitor, curve is OK reframe on CRT monitor. Its operation is simple, the user can be added conveniently, decrease module, undertake be configuringed afresh having a system to ask in order to satisfy new test, both neither is missing already some hardware and software resource, can satisfy the test requirement that often changes again. One, car connecting rod 3 labour nut pulls connecting rod of system of unit of close strong canopy automatically 3 labour nut is pulled automatically rush closely v hoe device is it is dynamical source with pneumatic, control the movement of air cylinder by electric a powerful person, arrive at the job to be versed in hind, pull by nut of personal computer automata close. Whole equipment is 3 labour circumgyrate type construction. The first labour next the makings on humanness, makings, the 2nd labour to screw nut, the 3rd labour sell piston lever head to rush. 3 labour phasic difference is 120 degrees, drive 3 to be versed in by revolving stage cylinder a changeover between. Its specific technology target is: 1. Manufacturing metre is 0.

25 minutes. 2. Screw the biggest torque is 15Nm, the requirement pulls close torque to be inside limits of 10NM ～ 15NM stepless is adjustable, precision is in ± 2.

Inside 5 limits. 3. Answer in the point of view that turns close torque to arrive at 15Nm process change trains to pass from 8Nm relatively constant. When torque is 5Nm spot coder begins to note number, when torque arrives at 12Nm, the angle that has turned is 5 degrees, it is qualification namely. In be operated actually, can have the thread of foreign matter infiltration such as scrap sometimes, cause an error, bring about the generation of defective goods. Accordingly we put forward torque one corner is compound control law, in screw overcame the surface uneven, after the torque with bear certain, had twisted certain corner again, in order to improve product quality. Torque principle of compound control law is like one corner the graph is shown 1 times. In screw in the process, how to control rotate speed of main shaft electric machinery constant it is accurate measure screw the key of pitching moment. This system used the dc electric machinery that heads PWM timing unit, namely type of pulse width modulation. Its principle block diagram is shown 2 times like the graph. Install photoelectricity coder on main shaft at the same time, in order to measure the point of view that winner axis screws had turned when nut, assure product quality. 2, fictitious the realizes fictitious instrument birth that changes test system, the instrument that the traditional instrument instead that gives priority to with hardware gives priority to with software, calculate in data thereby, the result shows, of productivity carried advanced respect to get be improvemented tremendously. Car connecting rod 3 labour what nut turns unit of close strong riveting automatically is fictitious change improved a design to use be based on a PC, with inside buy type data collects the imitate output that blocks a resolution, can undertake imitate / the number sparks, have 10 programmable function to input port. The system is main hardware block diagram is shown 3 times like the graph. The system uses the Labwindows/CVI of NI company to develop platform as software, it is built on architecture of open mode software, with the project (one In DAQ of Plug) the program that joins suitably, collect into what linage occupies with processing. The computer and photograph of DAQ series product are united in wedlock, can undertake the process is controlled be metricaled in real time mixing. In producing a course we again beardless also by artificial record data, in input data the analysis or showing a program, inside buy type DAQ and proper software close suitably, can realize these functions automatically. The DAQ that plan designs buy type DAQ to basically use to be inserted in PC box interior inside board, use software is right whole measure process and actual imitate / digital signal undertakes handling. Typical DAQ board include one or more simulation / digital converter (Converts) , digital I/O mouth, and note number / time loop. These compositive component are the computer and actual imitate amount, the interface between digital amount and time I/O signal, read for us wrote processing data to offer convenient. In this system, the AT-MIO-16E-2 that we choose NI company serves as inside buy type DAQ board, its main function index is: 16 Chan Duan, 8 imitate that need branch measure an input, 12 sampling precision, sampling rate amounts to 500kS/s, each passageway gain and span become independent each other; 2 passageways, 12 files are thematic frame, c++ source file, head file, library file, target module, user interface file, driver of instrument of dynamic link library muti_function package combines an organic whole, support dynamic data to exchange (DDE) wait for network function with TCP/IP. Car nut is pulled automatically close detect the working interface of subsystem is shown 4 times like the graph, can with other test switch undertakes between link. 3, because conclusion was used be based on a PC, configuration has inside buy type DAQ board, as software with Labwindows/CVI development platform undertakes the process is monitored with control, fictitious the design program take out after changing original giant machine cabinet, OK and instant ground shows a result with all sorts of convenient way, can keep the outcome the file that waits for a form for Excel, still can undertake long-range monitoring and data are collected, reduced an analysis to handle the time that data place needs. And the process designing platform that the graph changes, debug to systematic development, and of executable program generate, get primely than original system much. If what need to measure,charge parameter amount a lot of, considering electromagnetism screen, the system is patulous with development, adopt the implementation plan that is based on VXI bus line, more will appropriate. CNC Milling