Measuring transducer for ac voltage with a microcomputer

1983 ◽  
Vol 26 (7) ◽  
pp. 563-566
Author(s):  
V. I. Bakanov ◽  
I. N. Zhelbakov ◽  
V. S. Popov
Keyword(s):  
Measuring Transducer

scholarly journals Rationale for the parameters of the measuring transducer in RFID technology with inductive coupling

2019 ◽  
Vol 64 (1) ◽  
pp. 98-109
Author(s):  
V. K. Zheleznyak ◽  
V. B. Tolubko ◽  
L. P. Kriuchkova ◽  
A. P. Provozin
Keyword(s):  
Electromagnetic Compatibility ◽  
Measuring Transducer ◽  
Object Identification ◽  
Inductive Coupling ◽  
Identification System ◽  
Informative Parameter ◽  
Primary Measuring ◽  
Accuracy And Stability ◽  
Primary Measuring Transducer ◽  
Electric Oscillation

In the work the technology of radio-frequency identification of objects with inductive coupling is considered, using passive electric oscillating circuits tuned to fixed frequencies from the working frequency range as identification features of the object. The choice of the primary measuring transducer and the informative parameter is based on the results of the analysis of the system of inductively coupled active and passive electric oscillation circuits, known from the theory of radio engineering circuits. The parameters of the measuring transducer ensuring the fulfillment of the requirements for identification and localization of objects specified by technological conditions are substantiated. Factors that are potentially dangerous with respect to reducing the information reliability of the measuring transducer are considered, as well as the possibility of reducing their influence to a minimum. The problems of experimental research are formulated. It is shown that the analysis can be performed by software discrete adjustment of the primary measuring transducer and the generator feeding it. In this case, the task of increasing the speed is targeted at decreasing the duration of the step of tuning the primary measuring transducer. The required reliability of object identification is achieved by: ensuring high stability of the frequencies of the generator supplying the primary measuring transducer; accuracy and stability of tuning of the primary measuring transducer to the frequencies of the supplying generator; protection of the primary measuring transducer from the influence of interference generated by external sources and other measuring converters of the object identification system (electromagnetic compatibility of the object identification system); sufficient magnitude of the response of the primary measuring transducer to the introduction of passive electrical oscillation circuits; sufficient frequency tuning interval for passive electric oscillation circuits; accuracy and stability of tuning of passive electric oscillation circuits; stability of the detection threshold relative to the initial level of the informative parameter. Electromagnetic compatibility of measuring transducers, whose sensing elements are in the zone of mutual influence, is provided by synchronizing the operation of measuring transducers with shunting of inactive sensors, screening, mutual orientation and spacing of sensing elements.

scholarly journals ANALISYS OF THE INFLUENCE OF GLUE JOINTS ON THE MEASUREMENT OF PHYSICAL PROPERTIES OF STRUCTURAL ELEMENTS USING FIBER BRAGG GRATING

2020 ◽  
Vol 10 (3) ◽  
pp. 99-102
Author(s):  
Tomasz Zieliński ◽  
Łukasz Zychowicz
Keyword(s):  
Stainless Steel ◽  
Physical Properties ◽  
Fiber Bragg Grating ◽  
Transmission Spectrum ◽  
Measuring Transducer ◽  
Bragg Grating ◽  
Transmission Characteristic ◽  
Test Results ◽  
Structural Elements ◽  
Factors Affecting

The research presents the analysis of the influence of the glue connection on the measurement of elongation of stainless steel and aluminum samples by means of fiber Bragg grating (FBG) with uniform fibers used as a measuring transducer. Research indicates two possible factors affecting the deformation of the transmission spectrum obtained during elongation measurement. One of them is the type of adhesive that is used to make the connection between the fiber Bragg grating and the tested sample. The second possible factor is method of connection's execution. The need for research on glue connection resulted from the formation of defects mainly in the form of numerous side bands visible in the transmission spectrum during the measurement of elongations. The test results were presented in the form of graphs obtained on the basis of transmission characteristic.

Measuring Transducer Modelled by Means of Fractional Calculus

2010 ◽  
pp. 286-295 ◽  
Author(s):  
Mirosław Luft ◽  
Elżbieta Szychta ◽  
Radosław Cioć ◽  
Daniel Pietruszczak
Keyword(s):  
Fractional Calculus ◽  
Measuring Transducer

scholarly journals Modelling the Force Action of a Liquid on the Shutter of a Measuring Transducer

2020 ◽  
Vol 157 ◽  
pp. 02007
Author(s):  
Vitaly Golubovsky ◽  
Vladimir Konovalov ◽  
Marina Doncova
Keyword(s):  
Measuring Transducer ◽  
Theoretical Models ◽  
Liquid Jets ◽  
Hydrodynamic Effect ◽  
Correction Factors ◽  
Force Action ◽  
Original Design ◽  
Supply Pressure ◽  
Experimental Values ◽  
Two Jets

The article describes the original design of the measuring transducer of angular velocity of the type “flapper-nozzle “. The aim of the study is mathematical modeling in the MathCAD program of the force action of liquid jets exiting nozzles, since this significantly affects the characteristics of the converter. The calculated values of the acting forces are compared by several known methods and their results are compared with experimental data. For the proposed design of the measuring transducer, greater convergence of the theoretical and experimental values of the power characteristic in the linear section is provided by the expressions for determining the force effect of two jets on the damper, defined as the hydrodynamic effect of the liquid jet on the obstacle. Given the real differences in the design of the converter from theoretical models, it is required to apply correction factors. As pressure increases, the coefficient increases from 1 to 1.24-1.30 depending on the pressure supplied to the measuring transducer and the version of expression used to calculate it. When using the expression for the approximate calculation of the acting forces in the converter, the correction factor is much higher and varies from 1.9 at a supply pressure of 0.5 MPa to 1.74 at a supply pressure of 1.5-2.0 MPa. The practical use of this calculation option is limited to the linear zone of pressure dependence in the working chambers of the converter on the gap between the nozzles and the shutter.

A Study of Indicator Passage Error Correction Schemes

1991 ◽  
Vol 113 (3) ◽  
pp. 399-405
Author(s):  
B. G. Shiva Prasad ◽  
F. L. Heidrich
Keyword(s):  
Experimental Data ◽  
Error Correction ◽  
Time Domain ◽  
Prediction Accuracy ◽  
Method Of Characteristics ◽  
Measuring Transducer ◽  
Dynamic Effects ◽  
Pressure Time ◽  
Efficient Calculation ◽  
Frequency Domain Methods

The passage length between the cylinder and the measuring transducer is known to cause distortion of pressure time traces due to pulsations caused by dynamic effects. This paper attempts to arrive at a simple and efficient calculation scheme for correcting those distortions. Both time domain (method of characteristics approach) and frequency domain methods are evaluated to assess the importance of considering various effects for improving the prediction accuracy. The predictions from both methods are compared with experimental data as well as the results of Heidrich [6], who used simpler versions of these methods.

Measurement of Impact Loads using a Laser Doppler Velocimeter

1990 ◽  
Vol 204 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R S Birch ◽  
N Jones
Keyword(s):  
Experimental Study ◽  
Measuring Transducer ◽  
Research Field ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Impact Loads ◽  
Peak Loads ◽  
Structural Impact ◽  
The Mean ◽  
Selection Of

The design and selection of transducers is an important consideration for the measurement of impact loads. This paper examines a load-measuring transducer based on a non-contact laser Doppler principle. An experimental study assesses the deformations and velocities obtained using a laser Doppler velocimeter and compares the mean and peak loads with those recorded by an accelerometer and a load cell. The paper concludes that this device is a valuable tool in the structural impact research field.

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