Data acquisition is the process of sampling signals that measure real-world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer. Data acquisition systems, abbreviated by the acronyms DAS, DAQ, or DAU, typically convert analog waveforms into digital values for processing. The components of data acquisition systems include:
15-637: [REDACTED] Look up daq in Wiktionary, the free dictionary. DAQ or variation , may refer to: Data acquisition , the sampling of real-world signals to generate data that can be manipulated by a computer Delivered Audio Quality , a measure of audio quality over a transmission medium Madiya language (ISO 639 language code: daq ) Changping railway station (Guangdong) (station code DAQ ), in Changping, Dongguang, Guangdong, China "DAQ",
30-412: A PC motherboard or in a modular crate ( CAMAC , NIM , VME ). Sometimes adapters are needed, in which case an external breakout box can be used. DAQ cards often contain multiple components (multiplexer, ADC, DAC, TTL-IO, high-speed timers, RAM). These are accessible via a bus by a microcontroller , which can run small programs. A controller is more flexible than a hard-wired logic, yet cheaper than
45-521: A CPU so it is permissible to block it with simple polling loops. For example: Waiting for a trigger, starting the ADC, looking up the time, waiting for the ADC to finish, move value to RAM, switch multiplexer, get TTL input, let DAC proceed with voltage ramp. Today, signals from some sensors and Data Acquisition Systems can be streamed via Bluetooth. DAQ device drivers are needed for the DAQ hardware to work with
60-549: A PC. The device driver performs low-level register writes and reads on the hardware while exposing API for developing user applications in a variety of programs. Specialized DAQ software may be delivered with the DAQ hardware. Software tools used for building large-scale data acquisition systems include EPICS . Other programming environments that are used to build DAQ applications include ladder logic , Visual C++ , Visual Basic , LabVIEW , and MATLAB . IBM 7700 Data Acquisition System The IBM 7700 Data Acquisition System
75-400: Is a collection of software and hardware that allows one to measure or control the physical characteristics of something in the real world. A complete data acquisition system consists of DAQ hardware, sensors and actuators, signal conditioning hardware, and a computer running DAQ software. If timing is necessary (such as for event mode DAQ systems), a separate compensated distributed timing system
90-498: Is different from Wikidata All article disambiguation pages All disambiguation pages Data acquisition Data acquisition applications are usually controlled by software programs developed using various general purpose programming languages such as Assembly , BASIC , C , C++ , C# , Fortran , Java , LabVIEW , Lisp , Pascal , etc. Stand-alone data acquisition systems are often called data loggers . There are also open-source software packages providing all
105-612: Is required. A sensor , which is a type of transducer , is a device that converts a physical property into a corresponding electrical signal (e.g., strain gauge , thermistor). An acquisition system to measure different properties depends on the sensors that are suited to detect those properties. Signal conditioning may be necessary if the signal from the transducer is not suitable for the DAQ hardware being used. The signal may need to be filtered, shaped, or amplified in most cases. Various other examples of signal conditioning might be bridge completion, providing current or voltage excitation to
120-563: The IBM 7700 Data Acquisition System , and its successor, the IBM 1800 Data Acquisition and Control System . These expensive specialized systems were surpassed in 1974 by general-purpose S-100 computers and data acquisition cards produced by Tecmar /Scientific Solutions Inc. In 1981 IBM introduced the IBM Personal Computer and Scientific Solutions introduced the first PC data acquisition products. Data acquisition begins with
135-545: The University of Rochester and the other at Stanford University . Both were donated by IBM. The IBM 7700 is an 18-bit system, with instructions occupying two 18-bit words. Arithmetic instructions generally execute in two or three machine cycles, except for multiply, about 8 cycles, and divide, 12 cycles. A machine cycle is two microseconds. Address space is 262,144 words, but the two machines known to have been built had 16,384, 32,768 or 49,152 words. The IBM 7700
150-470: The physical phenomenon or physical property to be measured. Examples of this include temperature, vibration, light intensity, gas pressure, fluid flow, and force. Regardless of the type of physical property to be measured, the physical state that is to be measured must first be transformed into a unified form that can be sampled by a data acquisition system. The task of performing such transformations falls on devices called sensors . A data acquisition system
165-508: The code for Dominion Arsenal; see List of military headstamps DJ DaQ, disc jockey on Show Me the Money (South Korean TV series) seasons 4 , 5 , 6 See also [ edit ] [REDACTED] Search for "daq" on Misplaced Pages. All pages with titles beginning with DAQ All pages with titles containing DAQ DAC (disambiguation) DAK (disambiguation) Dack (disambiguation) Topics referred to by
SECTION 10
#1732787695759180-588: The necessary tools to acquire data from different, typically specific, hardware equipment. These tools come from the scientific community where complex experiment requires fast, flexible, and adaptable software. Those packages are usually custom-fit but more general DAQ packages like the Maximum Integrated Data Acquisition System can be easily tailored and are used in several physics experiments. In 1963, IBM produced computers that specialized in data acquisition. These include
195-403: The same term [REDACTED] This disambiguation page lists articles associated with the title DAQ . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=DAQ&oldid=1244115332 " Category : Disambiguation pages Hidden categories: Short description
210-540: The sensor, isolation, and linearization. For transmission purposes, single ended analog signals , which are more susceptible to noise can be converted to differential signals . Once digitized, the signal can be encoded to reduce and correct transmission errors. DAQ hardware is what usually interfaces between the signal and a PC. It could be in the form of modules that can be connected to the computer's ports ( parallel , serial , USB , etc.) or cards connected to slots ( S-100 bus , AppleBus, ISA, MCA , PCI, PCI-E, etc.) in
225-418: Was announced by IBM on December 2, 1963. It is capable of collecting data from as many as 32 sources simultaneously, process the data and transmit results to up to 16 remote printers, display units or plot boards. The IBM 7700 was short-lived, being replaced by the IBM 1800 Data Acquisition and Control System on November 30, 1964. Two IBM 7700 Data Acquisition Systems are known to have existed: one at
#758241