Summary: Network is measured is mechanical quantity report measures the development way with new technology, and fictitious instrument is the base that network measures. Introduced the main configuration of fictitious instrument and the gradual progress to network, analysed the mechanical quantity that is based on computer network to measure technical program and software technology, provided the applied example that network measures. Significant progress gives the every time of 1 foreword science and technology mechanical amount test method and instrument are brought change revolutionarily. 20 centuries 80 time of 50 ～ , mechanical quantity checks theory and union of electronic technology photograph, generation and developed machinery to measure report to measure a technology. Basically use the independent instrument with imitate circuit technology and onefold, fixed function to realize the measurement of mechanical quantity at that time. 80 time later period arrives 90 time, computer technology is entered measure a domain, formed the fictitious instrument system that is used at mechanical quantity test. Fictitious instrument technology can make a common computer becomes the machine with a complete function to measure a measuring instrument, in basic hardware support falls, what can realize instrument function quickly through modifying software is patulous with changeover; To finish more complex test job, OK still the computer establishs complete measurement for core system. Current, as network technology gain ground quickly, the machinery of new generation measures quantity, analysis and be vividly portrayed of transmission technology program. The mechanical quantity that is based on computer network checks a technology to be able to make measure information to be able to share inside wider range, of quality of the long-range control that produces a course to realizing machinery, mechanical product monitor remotely, diagnose remotely of mechanical equipment malfunction etc have important sense. The technology of mechanical quantity test of network will make the inevitable choice that contemporary machining technology expands. The base that 2 network measure -- , the goal that fictitious instrument achieves network machinery to measure a volume is to make mechanical quantity measures information to be able to pass computer network to realize the high speed that restricts without time, place to transmit. To achieve this one goal, must use fictitious instrument (Virtual Instrument) technology. In the development process that is in change quickly as a result of fictitious instrument technology, in because the definition of this pair of fictitious instruments also is in,fashioning a process stage by stage. The company of NI of famous manufacturer United States of fictitious instrument domain is fictitious instrument definition: ① moves one kind on the PC normally, the combination of the hardware that has traditional independent instrument function and software; ② program of a LabVIEW, regard an user as interface by before face plate and composition of program of a graph. The fictitious instrument that at present domestic industry mentions is to point to commonly former (ever had before " clever condition instrument " , " instrument blocking type " , " computer instrument " wait for a variety of name) . To make clear a meaning, the author suggests definition of will fictitious instrument is: It is the foundation, science information that is core with software with the computer and network test, analysis, memory, transmit with control system. Such definitions can highlight software technology already the action in fictitious instrument system, reflected the newest progress of fictitious instrument technology in network environment again. At present configuration of commonly used fictitious instrument hardware basically has the following kinds: Graph the structure of basic fictitious instrument hardware that structure of 1 basic fictitious instrument hardware shows 1 times like the graph. VXI, the instrument of VME bus line is patulous: This is one kind gets on the world extensive and accepted with adopted instrument standard. The characteristic of this structure is collect signal, all sorts of module such as signature manage load standard box, box has news report through inserting the communication card of the computer and computer, or embed the computer box 0 insert groove. Communication card and cable basically have GPIB, 1394, MXI3 is planted standard. PXI, the instrument of PCI bus line is patulous: This configuration and VXI are basic and identical, distinction depends on bus line differs and the price is more low. If embed controller PXI box, become a kind to check special computer namely. GPIB(HP-IB or IEEE488) , general interface bus line: This is a kind of computer and the interface that the tradition measures an instrument, GPIB communication card inserts the computer, repass GPIB cable, can realize the computer to measure the control of the instrument and visit to the tradition. String together buccal instrument: This also is a kind of computer and the interface that the tradition measures an instrument, can achieve pair of contented and definite agreements (the connection that surveys instrument and computer like the tradition of RS232) . Commonly used fictitious instrument software develops platform to include the LabVIEW(Virtual Instrument Engineering Workbench) of current and extraordinary popularity and LabWindows/CVI, HP-VEE, VB, VC to wait. Fictitious instrument is to measure the technical heat that dominates a field currently, it represented the future of instrument technology to develop way. Industrial developed country already used fictitious instrument extensively at each domains such as physics of medicine of spaceflight, communication, biology, earth, electron, machinery, undertook to this a large number of scientific research and project application work. Home also takes the research of fictitious instrument and project application seriously very, obtained a lot of positive result in recent years, apply its at mechanical parameter test, mechanical failure to diagnose stage by stage, the domain such as control of mechanical production process. Graph the gradual progress of 2 fictitious instruments pursues 3 network machinery measures test system basic structure model the net of aether of network gradual progress of 3 fictitious instruments, principle that exceeds text link, wireless communication, internet to wait for network technology to changing automation to check and method. Conform for the computer network technology that develops with high speed, current and fictitious instrument ceaseless to network gradual progress, if the graph is shown 2 times,its technology develops a tendency. The fictitious instrument of ceaseless gradual progress formed the test node of contemporary instrument system. The administrative levels that new generation machine measures test system to if the graph is shown 3 times,be being formed stage by stage changes network structure. In the system, distributed data collects can more effective ground to remove noise interference; Equipment of VXI, PXI offerred real time data to analyse ability; The whole history data that uses project database to be able to measure a volume to machinery conveniently undertakes statistic is analysed; Test system server can undertake administrative effectively to whole system; Each technical management department can share the business test technology data, can release relevant technology information to world each district through Internet. The program of technology of mechanical quantity test that the 4 mechanical quantities that are based on computer network measure technical program new generation can make full use of the infrastructure of local area network with existing enterprise, make check a net to blend in computer network. The other hardware that checks node but the measurement with specific basis purpose, measure requirement and existing technology natural resources to choose a plan 3 medium parts or entire facility. As the core of fictitious instrument, software is the technical key that realizes network machinery to measure a volume. The software development environment of the system of mechanical quantity test that is based on computer network develops efficiency except the requirement tall, program is revised easily, outside safeguarding, still should have good network interface function. The LabVIEW of American NI company reflected great dominant position in this respect. NI product has very tall collect by nature, its PXI equipment, VXI equipment and distributed data collect module to have function of aether net connection, support LabVIEW process designing at the same time. In addition, NI product can satisfy the requirement of user of disparate arrangement of ideas and disparate test circumstance, can undertake complex TCP/IP process designing already, can offer simple data socket again (Datasocket) technology; Kit is hanged outside its enterprise interconnection the safe control of attainable higher administrative levels, still can pass executive SQL statement to undertake operating to long-range database in LabVIEW. Although the data of LabVIEW inserts buccal technology to be based on TCP/IP agreement, but do not need an user to undertake complex TCP/IP rock-bottom process designing, use its transmission data to be just like insert in power source socket on plug goes to the lavatory like usable report namely. Technology of service data socket can transfer DataSocket function in program block diagram, a menu is played to undertake data is linked on object of OK also and advanced face plate. After transferring data socket function, labVIEW opens a DSServer program that runs independently automatically, it bales ceaselessly deliver or receive data, but won't take up measure the time that accuses to apply a program to be in computer CPU. The URL of service data socket fills in format give typical examples is: Dstp://localhost/data. Txt or Dstp://166.
111.
62.
163/data. "Dstp " state data socket transmits an agreement, among paragraph address of IP of the lead plane that it is constellation or label, last paragraphs are data the position on host machine. The client program amount that DS Server Manager can set DS Server to be able to be linked and the data that can found amount, setting user and user group and user are visited and manage data attributive, enhanced the security of network news report. Technology of service data socket also can be network computer setting Wu of client computer kimono implement mode, client computer issues the requirement that collects data to the server, receive collection data next, this also is industrial spot test and pilot a kind of basic form, for example each technical management department need the factory segment of certain to the spot production has sampling observation, can check node to issue sampling request to the spot, the test node computer setting is a server, implement the operation project that each client asks by turns. Graph the 4 generation set breakdown that move on computer network diagnose a system to pursue generation set of example of test of network of 5 mechanical capacities runs structure of network of laboratory of test of 5 mechanical engineerings condition is monitored with breakdown diagnostic graph shows the equipment trouble that develops for some firepower power plant for the author 4 times to detect with diagnostic system. Among them, the data of every aircrew is collected with real time the node that monitor accuses machine, data to collect card and signature manage module to form by spot labour, can undertake the simple modal analysis such as chart analysis, relevant analysis to signal, if discovery is apparently unusual,call the police instantly, hint the value defends personnel to be handled in time. Online diagnostic system is set in plant technology center, it can have check of make one's rounds to each aircrew, undertake to diagnostic signal small wave is decomposed, associated dimension analysis, if discover the problem issues a statement to the spot, release data on the network. Long-range expert diagnoses a system to be set in institution of higher learing, it can check data through Internet visit, have trade off study with the information in the knowledge base, offer diagnostic opinion to the factory accordingly. A mechanical engineering that the graph shows the lab of machinist Cheng test that is based on computer network 5 times to be built for the author checks the network structure of the lab, it is the one part of campus net, a kind of bus line structure is on logic, used network to transmit a technology. Each student experiment is versed in deploy a general communication number source, corresponding sensor and graph show fictitious instrument 1 times basic hardware. The teacher is versed in provide case of equivalence of equipment of test of oscillatory, discharge the signal source with tall, large size and SCXI are muti_function signature manage device, data collects the 16 PCI-6035E data with an use higher class to collect card. A few high-grade conventions with original lab measure an instrument also connection arrives on pedagogic machine, share for complete lab. Because use network to transmit network structure of the technology, the information that an any machines in the lab issue all can be received by all machines. After pedagogic accident linage occupies socket program, student experiment is versed in in going up to require the data socket process in oneself only accurate fill in the IP address of pedagogic machine or network label name, can complete test test like using his machine to collect data. The wide application of 6 epilogue PC makes define an instrument to replace by the user by manufacturer definition instrument becomes a possibility. After when people application computer technology checks what the technology undertook thoroughly remould oneself to transform to automation, of network technology gaining ground to give the test that is based on the computer put oneself in another's position again was to bring revolutionary change. The scientific research that tests a technology to be based on the mechanical quantity of computer network and obtained positive result promoted the process of informatization of instrument network, enterprise, will monitor to urban environment state, oil pipeline and gas pipeline leak are monitored wait for radiate of domain of a lot of application, because this has wide development perspective. CNC Milling
CNC Machining