scholarly journals SELF-CALIBRATION OF ULTRASONIC TRANSDUCERS IN AN INTELLIGENT DATA ACQUISITION SYSTEM

2014 ◽  
pp. 9-15
Author(s):  
Chris Papageorgiou ◽  
Theodore Laopoulos
Keyword(s):  
Data Acquisition ◽  
High Performance ◽  
Low Cost ◽  
Ultrasonic Transducers ◽  
Single Chip ◽  
Measuring Systems ◽  
Self Testing ◽  
On Line ◽  
Intelligent Data Acquisition

The rapid growth of powerful single-chip microcomputers for monitoring and data acquisition applications permits nowadays the design of advanced measuring systems. The work reported here is presenting an advanced on-line monitoring configuration in order to improve the performance and extend the lifetime of ultrasonic transducers by applying an automated testing and calibration technique. The operation of this instrumentation system is based on the fast measurement of frequency and amplitude, performed by the proposed configuration. The combination of this information with the time of flight of each pulse-train is then used to derive practically all characteristics of ultrasonic transducers. Due to its low cost and small size, the system can be used either for characterization and classification of transducers, or as a self-testing and automated calibration section within any high performance ultrasonic system.

scholarly journals LOW-COST, INTELLIGENT DATA ACQUISITION SYSTEM FOR QCM AND OTHER RESONATOR-BASED BIO- AND CHEMICAL SENSORS

2014 ◽  
pp. 9-17
Author(s):  
Sergey Y. Yurish
Keyword(s):  
Data Acquisition ◽  
Integrated Circuit ◽  
Low Cost ◽  
Data Acquisition System ◽  
Wide Frequency Range ◽  
Acquisition System ◽  
Bulk Acoustic Wave ◽  
Frequency Range ◽  
Modified Method ◽  
Intelligent Data Acquisition

A low-cost, intelligent data acquisition system for quartz crystal microbalance (QCM) and other (superficial SAW and bulk acoustic wave) resonator-based chemical and biosensors described in this article. The system is based on the novel modified method of the dependent count and allows obtaining high metrological performances: programmable and constant in all frequency range relative error of measurement up to 0,0005 % (5 ppm); nonredundant, reduced conversion time of measurement and wide frequency range from 0.05 Hz to 9 MHz (144 MHz with prescaling). The developed system allows measuring variations of the resonance frequency shift for QCM sensors working in liquids and gases. The described low-cost data acquisition system is based on novel integrated circuit of universal frequency-to-digital converter. This design approach has eliminated much of the hardware: there is no need for a microcontroller and complex sensor interfacing electronics, as it is directly compatible with PC computers.

scholarly journals Review on Pressure Sensors: A Perspective from Mechanical to Micro-electro-mechanical systems

2021 ◽  
Author(s):  
Ankur Gupta
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Pressure Sensors ◽  
Micro Electro Mechanical System ◽  
Single Chip ◽  
Micro Electro Mechanical Systems ◽  
Compact Size ◽  
Wide Range ◽  
Fabrication Procedure ◽  
Application Requirements

Swiftly emerging research prospects in the Micro-Electro-Mechanical System (MEMS) enable to build of complex and sophisticated microstructures on a substrate containing moving masses, cantilevers, flexures, levers, linkages, dampers, gears, detectors, actuators, and many more on a single chip. One of the MEMS initial products that emerged into the micro-system technology is the MEMS pressure sensor. Because of their high performance, low cost, and compact size, these sensors are extensively being adopted in numerous applications viz., aerospace, automobile, and bio-medical domain, etc. These application requirements drive and impose tremendous conditions on sensor design to overcome the tedious design and fabrication procedure before its reality. MEMS-based pressure sensors enable a wide range of pressure measurements as per the application requirements. Considering its vast utility in industries, this paper presents a detailed review of MEMS-based pressure sensors and their wide area of applications, their design aspects, and challenges, to provide state of an art gist to the researchers of a similar domain in one place.

A low cost, open and flexible on-line data acquisition system for instrumental chromatography

1995 ◽  
Vol 306 (2-3) ◽  
pp. 285-295 ◽  
Author(s):  
Joaquim Olivé ◽  
Antoni Mànuel ◽  
Pablo Rodriguez ◽  
Joan O. Grimalt
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Data Acquisition System ◽  
Acquisition System ◽  
On Line

Total Volume and Component Flow Measurement in Industrial Slurries and Suspensions Using Correlation Techniques

1971 ◽  
Vol 4 (8) ◽  
pp. T133-T138 ◽  
Author(s):  
M. S. Beck ◽  
G. Calvert ◽  
J. H. Hobson ◽  
K. T. Lee ◽  
P. J. Mendies
Keyword(s):  
Electrical Conductivity ◽  
Time Delay ◽  
Transit Time ◽  
Mass Flow ◽  
Flow Measurement ◽  
Low Cost ◽  
Ultrasonic Transducers ◽  
On Line ◽  
Correlation Techniques ◽  
Capacitance Transducers

Flow velocity can be derived directly from the transit time of natural turbulence signals between two transducers spaced along the direction of flow. The transit time is determined by cross-correlating the transducer outputs with either a special purpose correlator or an on-line computer. Advantages are that the time delay can be measured absolutely by the correlator, the flowmeters are relatively insensitive to the effects of up-stream disturbances, the transducers do not obstruct the flow, and suspensions and slurries can be metered. Results are presented for flow measurement of sand/water slurries using electrical conductivity and ultrasonic transducers, and for heavily loaded gaseous suspensions using capacitance transducers. A low cost mass flowmeter has been devised in which the mass flow of solids in a pneumatic conveyor is derived from measurement of variations in concentration intensity due to turbulence. Results are given for mass flow measurement of foodstuffs (flour, wheat and beans), pulverised fuel, cement and chemicals.

The Data Acquisition of High Speed A/D Conversion Based on STC12C5A32S2 SCM

2012 ◽  
Vol 182-183 ◽  
pp. 670-675
Author(s):  
Cheng Ying Wu ◽  
Zhan You Fan ◽  
Hong Jiao Ma ◽  
Zai Min He ◽  
Zhao Ming Wang
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
High Accuracy ◽  
Single Chip ◽  
Digital Signals ◽  
Single Chip Microcomputer ◽  
Display Module ◽  
Analog Signals ◽  
Lcd Display

In order to achieve high-accuracy, high speed and low cost A/D conversion, a new design based on STC12C5A32S2 single-chip microcomputer (SCM) is given. Compared with the previous A/D conversion, the biggest advantage is that the paper combine software with hardware and it can adjust the speed of transformation through procedure.We don't need to modify circuit, just need to modify signals of input and procedures. So the flexibility of A/D conversion can be enhanced, also saved costs. The design mainly makes use of new function of STC12C5A32S2 SCM to realize conversion between analog signals and digital signals. In order that researchers can analyze and use the convention results, the design add a LCD display module. The paper primarily analyses the design of circuit and interface technology between the SCM and other chips. Also, the peculiar function of STC, the LCD display method of LMB202DDC and the flow of software are expounded in detail. The simulation result based on Proteus is given by the end of paper.

Data Acquisition of BZD Low Burst and Intelligent Protection in the Mine

2012 ◽  
Vol 529 ◽  
pp. 331-334
Author(s):  
Chun Guang Li ◽  
Jun Mei Geng
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
Multiple Frequency ◽  
Single Chip ◽  
Frequency Signal ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
The Common ◽  
Rapid Processing

To describe the Underground low-pressure explosion-proof switch which has to require rapid processing of multiple frequency signal, the paper analyzes the specific signal and the common algorithms, according to the characteristics of the explosion-proof switch protection device to provide the high-precision, low-cost and high-speed data acquisition methods based on the single chip controller, which is also applied the BZD low burst intelligent protection.

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