Since 2006, NI CompactDAQ has been continuously simplifying the development of test and measurement applications in laboratories, industrial sites, and production lines without sacrificing performance and flexibility.
With the new NI cDAQ-9188 base with Gigabit Ethernet interface, NI CompactDAQ enables PC-based data acquisition technology to be applied to the measurement of remote sensors and electrical signals, thereby extending its application range from the laboratory to the laboratory. global wide.
The performance of NI CompactDAQ is very powerful. An NI CompactDAQ base can support the measurement of up to 256 electrical, physical, mechanical or audio signals. With the cooperation of more than 50 NI C series I / O modules for different sensors and NI patented signal flow transmission technology, NI CompatDAQ has high-speed data transmission characteristics, which can easily meet the requirements of highly flexible hybrid test systems. And can greatly reduce the difficulty of its development.
Long-distance data collection
The convenience and reliability of Ethernet technology are basically the same as those of USB technology. For data collection, Ethernet has two advantages that other ordinary PC external buses do not have: extremely long cable length and distributed network facilities. When the distance of the measurement location exceeds the maximum length of 5 meters of the USB cable, Ethernet is an ideal choice. After a CAT 5E cable exceeds 100 meters in length, it will require a switch or router to extend the signal relay to a farther place. In addition, many companies' IT departments have adopted Gigabit Ethernet (IEEE 802.3ab standard) as the infrastructure of their enterprise networks. With NI CompactDAQ, users can directly use existing network facilities and bandwidth to build remote or distributed measurement systems. One host computer can manage multiple test devices on the same subnet or multiple subnets at the same time.
Figure 1. The cDAQ-9188 base using the Gigabit Ethernet interface extends the application range of the NI CompactDAQ data acquisition platform to remote or distributed sensor and electrical signal measurement.
More than 50 kinds of C series modules
Because only a few systems require the same kind of I / O channels, NI ComapctDAQ was designed from the beginning as a hybrid measurement system that can acquire multiple signal types on a single base. Each C series module integrates all devices such as signal connection, conditioning and analog conversion in a small 2.8-inch by 3.5-inch box. By using more than 50 C series I / O modules in 8 slots, users can easily use NI CompactDAQ to build a test and measurement system that meets their requirements. At the same time, NI CompactDAQ has built-in advanced NI-STC3 with timing and synchronization performance, which can independently manage up to seven analog, digital and counter measurement tasks at the same time. For example, users can install a thermocouple acquisition module and an acceleration measurement module on a base at the same time, and collect data at different sampling rates.
Figure 2. Users can arbitrarily combine more than 50 C series I / O modules with built-in signal conditioning functions to build a mixed signal measurement system.
NI signal streaming technology
In order to make full use of the bandwidth of the Gigabit network, NI transplanted the patented technology for high-performance NI USB data acquisition products, NI signal data stream transmission technology, into the TCP / IP version for use with the NI CaompactDAQ base. Through this technology, the new C series high-speed acquisition module, such as NI9223, can achieve 16-bit high-speed data acquisition of 1 MS / s per channel for four channels. At the same time, the NI-DAQmx driver uses an advanced software architecture to establish a double-buffered data transmission link between the base and the host computer, which can realize the transmission of multiple bidirectional continuous waveforms. At the same time, the driver also monitors the network for unexpected delays and temporary interruptions in transmission caused by network congestion, and automatically makes adjustments to maintain data transmission. All of this work is done automatically by the driver and does not require user involvement, so that the user can focus on the measurement system instead of network communication.
Zero configuration network connection
The process of network configuration and rights management often requires experience. To make it easier for non-IT professionals to use network technology-based equipment, the NI CompactDAQ base is based on the Zero Configuration Network (Zeroconf) standard. Because of the Zeorconf technology, users only need to connect the NI CaompactDAQ system directly to the computer or to the local area network, without any network settings, MAX's configuration tool can automatically search and discover the device. In addition, users do not need to install any software on the host computer, you can use the web-based monitoring and configuration tool built in NI cDAQ-9188 to manage it through a web browser.
Figure 3. Users can connect to the web server embedded in the cDAQ-9188 base via a web browser to remotely configure and manage the NI ComapctDAQ system. Welcome to reprint, this article comes from the electronic enthusiast network ()
Software flexibility
Recognizing the diversity of measurement system requirements, NI has developed a data acquisition software architecture that is independent of PC bus technology. Users can use the same set of NI-DAQmx driver software for PCI, PCIe, PXI, PXIe, USB, NI data acquisition hardware on multiple buses such as Ethernet and Wi-Fi communicates to obtain data. The software developed by the user for the NI CompactDAQ system with USB interface can be used directly on the NI CompactDAQ system with Ethernet interface without any modification. In addition, the NI-DAQmx-driven API is compatible with a variety of programming platforms, and users can program NI CompactDAQ using programming tools such as LabVIEW, ANSI C / C ++, C #, or Microsoft VB.NET.
By combining NI's powerful hardware technology and flexible NI-DAQmx driver software technology, the NI CompactDAQ platform can help users collect simple experimental data in the laboratory or perform distributed testing in the factory's factory building.
– Charlie STIernberg
Charlie STIernberg is NI's product manager for wired and wireless network data collection, and holds a bachelor's degree in electrical engineering from the University of Texas at Austin.
New mega-sample rate NI C series modules
The NI 9223 Simultaneous Analog Acquisition C Series module can support a 4-channel sampling rate of 1 MS / s 16-bit resolution per channel. The sampling rate of the NI9223 is 10 times that of the NI 9215 synchronous acquisition module, which further enriches the sampling rate range of the C series module product line, making the measurement system based on CompactDAQ and CompactRIO more adaptable.
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