LabVIEW real-time control unit with two Ethernet ports
O NI cRIO-9074 integrated control device
o Possess PXI system of a NI PXI-8231/8232 Ethernet interface card
NI 9144 is subordinate to the bottom panel
C series I/O module
LabVIEW 8.6 editions or higher editions
Real-time module or higher edition of LabVIEW 8.6 edition
NI-RIO 3.0 edition
EtherCAT -oriented NI industry communication software
Put up the hardware
This guide uses one cRIO-9074 as LabVIEW real-time control unit. In order to put up system of this hardware:
1. In the appropriate bottom panel CompactRIO local bottom panel and/or NI 9144 bottom panel China inserts the C series I/O module.
2. Utilize a standard 5 kinds of cables or better Ethernet cables, connect cRIO-9074 Ethernet port 2 and port 1 of NI 9144 Ethernet. Adopting such a way, you can begin to form the daisy chain including a plurality of NI 9144 bottom panels from this control device.
Discuss from OLED technological principle OLED display device industrialization needs solving emphatically
With the development of science and technology, the display technology of information is updating constantly too. From the traditional cathode ray tube CRT Have developed into the advanced liquid crystal screen LCD . Carrying out the transition to the 3rd generation of display technology now. What stand for election is plasma body discharge display screen PDP as the 3rd generation of display technology , organic electro luminescent screen OLED , luminescent diode LED , the electric field stimulates shiny FEDs When. That competed for fiercestly in researching and developing is PDP, OLED, LCD now. They have their own strong points each, but final goals pursued are all uniform, namely demand to reach the quality light, high light, fast response, high definition with thin body analyse degree, low-voltage, high efficiency, long life, low cost. This text is recognized as optimal display technology at present, OLED does the simple introduction.
Basic principle and device architecture of OLED
While plating the appropriate electrode and adding the voltage on the surface of membrane two formed by some special strong firefly organic matters of optical property, this Read more
The technical high-speed development of the computer, stores the system capacity from several past KB storage space, get to present T8; And even PB storage space that will reach in near future, the ability of its data access is expanded at full speed. Such brand-new fields as SCSI, FC, SAN, iSCSI, IPStorage sum data life cycle for production of following manages, have entrusted the flourishing vitality for computer technology and network technique even more. The promotion of the poke characteristic is usually through increasing more numbers of physical magnetic disk drive or finishing on the infrastructure by disk drive of quicker rotational speed.
Machine loaded to store the facility request and have high reliability and high and impact-resistant, antidetonation, dampproof, is able to bear the high pressure and bear the high-temperature characteristic, and disk drive have machinery rotate at the access data, impact-resistance its, resist person who shake to be better, not suitable for severe environments such as Aero-Space,etc. to use. Solid state memory SSD on the basis of the flashing memory of the semi-conductive storage chip Appearance getting finer Read more
Seem in in one night, GPS employ apparatus develop into the intersection of handheld device and application from the intersection of car and inner unitarity already, and become a part of multimode handheld devices now, even imbed GPS in the notebook computer? The apparatus with GPS function is expected to become the market up to 30 billion dollars of scale within four years, this implies a lot of apparatuses will come from making assembly line in batches high, and GPS subsystems of each apparatus need testing, no matter single test, or as a part of multimode mobile phone system.
Different from Wi-Fi, WiMAX or mobile phone communication pattern, GPS is not a kind of receiver / projector technology. GPS IC has facilitated simple receiving apparatus, there is what the latter looked for in 24 effective GPS satellite signals, and do some direct triangulation and error correction and offer very accurate place information to user. Combine the digital map, GPS system will tell them people’s seat, and how to reach the place where they want to go. For this reason, the satellite signal minimum signal intensity is – 130dBm that GPS subsystem must be able to be with Read more
Internet technical fast development proposed more high requirement for the basic network facility, business such as IPTV business, video of the network and IP Phone require that must give security to network bandwidth and QoS; P2P business, junk email overflowing are consuming the bandwidth and influencing QoE index of the normal business ceaselessly too. In order to meet users to the demand with wide and business increased day by day. Operator and the intersection of apparatus and manufacturer must bear the weight of network to IP that scale expand day by day and ripe route of development exchange the technical equipment and carry on rigorous test day by day, in order to guarantee high capacity, high performance and high speed IP bear the weight of the development demand for the network.
The new route exchanges the technical development the most, enable the routing list volume test of the tradition, exchange, transmit aptitude tests even shake, test, test content can’t meet old characteristic high capacity already and function enrich the intersection of route and test requirement of commutation equipment. For example:
1The integration Read more
Move trade processor interface MIPI The alliance is responsible for popularizing the standardized organization of software and hardware of the mobile equipment. It release the intersection of D-PHY and norm already, norm this can realize, up to 1.5Gbps 1,500,000,000 at the communication link between chip and apparatus Data transmission rate. MIPI alliance also plans to release M-PHY norm in the near future, further raises the data transmission rate, reach the level of about 6Gbps. With needing movement application and characteristic of throughput of higher data to appear constantly, the requirements for transmission rate are improved correspondingly too. The application and characteristic include: The high-resolution camera catches, high definition video display, and is used in the long-term gradual progress LTE of the future generation Radio frequency RF Complicated modulation scheme of the mobile communication network.
The electric standard work group under MIPI alliance has invested huge efforts to make the norm of these physical layer, so as to ensure that can design the normal operation in the mobile environment actually. Very large to limit, a lot of components Read more
Give board input signal with signal generator, ondoscope generally can only use node and waveform between the place a certain in test circuit then, examine waveform between the two node, ground wire at the probe may other circuit short out, shed behind the line ground then, so, if you want to examine the waveform between two nodes and want reasonable variety in the circuit form, or make some by-product circuits used for testing. Certainly, you can two examine different point respectively, then compare, educate the intersection of sand and law, examine two phase difference of signal with Li.
This is because for guarantee security that electricity have, most electron tube instrument line link Safety Ground through the intersection of power and wired and. The ground wire of the ondoscope, signal generator, the stabilized voltage supply,etc. has arrived Safety Ground too, so two ground these be connected with, connect other position in circuit with ondoscope, connect but not that signal source with in place,it is will short out one part of a circuit not to have.
The dual trace oscilloscope has two probes, can measure two signals, but the ground wire of these Read more
This is a very concealed question, slightly careless, while inserting the ondoscope, will cause the unexpected explosion of some chips on the breadboard, not merely will have a very great impact on project, also enough to make us really gloomy for last a few days. So, should cause circuit designer and circuit to debug the attention of staff members enough.
I hide this kind in the ground again and again, I want to put the course of analyzing and is infected especially here, how to miss this hidden danger and make oneself suffer losses, this is very important, because has not paid attention to being hurt deeply, as for the solution, the prawns have been already analytic and very clear on the forum on the net.
It is a project about the phase place unimeter to employ in the first time 6 years ago, I was only responsible for the software programming of the one-chip computer at that time, exploded when that my dear friend who made hardware design inserted the ondoscope clamp at that time, later on that my dear friend has got down for two days and solved, and tell me because simulator and board short out to cause, so long as can be open power up does not delay Read more