Week 3 instrumentation and measurement systems week 3. Therefore, the dynamic characteristics and transient behavior of the instrument is as important as the static behavior. Compare the performances of two similar type of instruments, looking at the. Dynamic characteristics of measurement systems by ann on prezi. The dynamic characteristics of an instrument is determined by subjecting its primary element sensing element to some unknown and predetermined variations in the measured quantity. Kasuga denki helps customers solve their staticrelated problems by offering a wide lineup of static measurement equipment, which ensures appropriate measurement and management for customers with varied needs. In this study, dynamic characteristics of the developed spindle with waterlubricated hydrostatic bearings were investigated via simulations and experiments. Static error is defined as the difference between the measured value and the. The correct terms to use are set down in documents called standards. Pdf static and dynamic characteristics of resilient mats. Static characteristics static characteristics refer to the characteristics of the system when the input is either held constant or varying very slowly.
Dynamic characteristics of instruments and measuring systems 2103602 measurement and instrumentation introduction instruments and measuring system do. Before we can delve more deeply into the static and dynamic characteristics of instrumentation, it is necessary to understand the difference in meaning between several basic terms used to describe the results of a measurement activity. Dec 18, 2017 this channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals in this video we can learn static characteristics of a measuring system with. Modeling and analysis of static and dynamic characteristics. The characteristics of quantities or parameters measuring instruments that do not vary with respect to time are called static characteristics. Paper reports research on dynamic system characteristics of snow skis. Dynamic characteristics of measurement systems identification of dynamics of an element transfer function if the input is suddenly changed from one to another value then the output signal o is not instantaneously change to its new value. By static calibration it is meant that time is not involved. The behavior of such a system, where as the input varies from instant to instant, the output also varies is known as dynamic response of the systems.
A novel dynamic calibration method of measurement system for dynamic characteristics coefficients is proposed in this paper to eliminate the errors of the measurement system itself. The performance characteristics may be broadly divided into two groups, namely static and dynamic characteristics. Static characteristics in measurement system calibration. Static experiments verified the theoretical analysis results, and friction was found as the main factor that caused divergences between theory and measurement curves. What are the dynamic characteristics of instrument. A mathematic model of static characteristics was established, and influences of key parameters on static characteristics were studied. Any sensor acts as a filter on the data it processes. Dynamic calibration and verification device of measurement. The static characteristics and parameters of measuring. An instrument facing the flow direction measures the sum of the static and dynamic pressures.
In addition to the static bearing stiffness, the dynamic characteristics regarding bearing stiffness also affect significantly on the machining results. Measuring instruments are the device which indicates the measured quantity into a broadly displayed information. Isaac choutapalli department of mechanical engineering. So let me give me an overview of each one of these characteristics. Static and dynamic characteristics of instruments eit. In this article, we broadly classified the characteristic of an instrument in two types. Dynamic characteristics g the sensor response to a variable input is different from that exhibited when the input signals are constant the latter is described by the static characteristics g the reason for dynamic characteristics is the presence of energystoring elements n inertial. Static characteristics can be divided in to desirable and undesirable. As stated above, the sensor is the ocean scientist and engineers interface with the real world.
Jayasimha reddy assistant professor of mechanical engineering department g. This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals in this video we can learn static characteristics of a measuring system with. Modeling the dynamic characteristics of pneumatic muscle. Since dynamic pressure is referenced to static pressure. Chapter ii general characteristics of measurement systems. Static characteristics in measurement system free download as powerpoint presentation. Static and dynamic characteristics of instruments by k. The static characteristics of measuring instruments are concerned only with the steadystate reading that the instrument settles down to, such as the accuracy of the reading, etc. The identification accuracy of dynamic characteristics coefficients is difficult to guarantee because of the errors of the measurement system itself. The dynamic characteristics of measurement system are given below, speed of response.
Now, let us discuss about these two types of characteristics one by one. Mar 02, 2014 static and dynamic characteristics of instruments slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Morris, reza langari, in measurement and instrumentation second edition, 2016. Nov 21, 2014 characteristics of instruments there are two types of characteristics of instruments. Dynamic characteristics of instruments if we limit consideration to that of step changes in the measured quantity only, then equation 2. Characteristics of instruments there are two types of characteristics of instruments. For dynamic signals, the sensor or the measurement system must be able to respond fast enough to keep up with the input signals. A new phenomenological model consists of a contractile forcegenerating element, spring element, and damping element in parallel. Compared with the calibration method of suspension quality, this.
Virtual instrument based measurement system for analysis of. The measurement system was built on the basis of a set of signal conditioners connected with a data acquisition card built in a pc. If you continue browsing the site, you agree to the use of cookies on this website. Explain about static and dynamic characteristics of measurement system nd. Measurement systems having inputs dynamic in nature, the input varies from instant to instant, so does the output. Several known inputs feed the measurement system and the outputs are recorded. Craig generalized configurations and functional descriptions of measuring instruments it is desirable to describe both the operation and performance static and dynamic of measuring instruments and associated equipment in a generalized way without recourse to specific physical hardware. This lecture is about measurement system, static characteristics and dynamic characteristics like accuracy, precision, repeatability, fidelity, speed of resp. In practice, the characteristics of the one group may well. The static characteristics of measuring instruments are concerned only with the steadystate reading that the instrument settles down.
The performance characteristics of an instrument are mainly divided into two categories. Characteristics of measurement systems the system characteristics are to be known, to choose an instrument that most suited to a particular measurement application. A model of the dynamic error as a measurement result of. A pneumatic muscle pm system was studied to determine whether a threeelement model could describe its dynamics. Static and dynamic characteristics of resilient mats for vibration isolation of railway tracks. The set of criteria defined for the instruments, which are changes rapidly with time, is called dynamic characteristics. The various static characteristics and parameters are destined for quantitative.
Dynamic characteristics the relationship between the system input and output when the measured quantity measurand is varying rapidly. The items that can be classified under the heading static characteristics are mainly. Static characteristics of measurement system devices. Static and dynamic characteristics instrument systems are usually built up from a serial linkage of. The set of criteria defined for the instruments, which are used to measure the quantities which are slowly varying with time or mostly constant, i. The present work shows the structure of a measurement system dedicated to examine static and dynamic characteristics of sensors used to measure temperature. Static characteristics determination of static characteristics is. Dynamic characteristics dynamic characteristics tell us about how well a sensor responds to changes in its input. Reproducibility is the ability of a measurement to be duplicated, either by the same person or by someone else under. Jan 18, 2018 this lecture is about measurement system, static characteristics and dynamic characteristics like accuracy, precision, repeatability, fidelity, speed of resp. Dynamic characteristics of instruments and measuring systems 2103602 measurement and instrumentation introduction instruments and measuring system do not respond to the change of input instantly. The dynamic characteristics of a measuring instrument describe its behaviour between the time a measured quantity changes value and the time when the instrument output attains a. Static and dynamic characteristics of instrumentation.
The static characteristics of instruments are attributes that changes slowly with time. The overall dynamic behaviour has been shown to be dominated by the solenoid characteristic relating force to applied voltage. This information may be obtained for purposes of controlling the behavior of the system as in engineering applications or for learning more about it. When the measured quantity changes rapidly, it is important to consider the dynamic response of. The static and dynamic characteristics of a pressure. We also independently develop and produce static sensors, which are the heart of static measurement equipment. Pdf dynamic calibration and verification device of.
For example, a trace made on an ink pen chart recorder will be subject to the speed at which the pen can follow the. Static characteristics where the performance criteria for the measurement of quantities that remain constant. Laboratory and field measurements of frequency response, running surface pressure excitation, and static system. The use of this characteristic combined with additional dynamic terms not previously considered allows new estimations of internal characteristics to be made such as the damping flowrate.
Virtual instrument based measurement system for analysis. Measurement system the performance characteristics of an instrument are mainly divided into two categories. The static and dynamic characteristics of a pressure relief. Dynamic characteristics of instruments the static characteristics of measuring instruments are concerned only with the steadystate reading that the instrument settles down to, such as the accuracy of the reading etc. As far as the authors are aware, this model has not been used to describe the dynamics of pm.
Hence, the dynamic behavior of the system is also important as the static behavior. Systematic characteristics the static characteristics and parameters of measuring instruments describe the performance of the instruments related to the steadystate inputoutput variables only. They will possess a dynamic component that must be understood for correct interpretation of the results. Further simplification can be made by taking certain special cases of equation 2. Dynamic response of measurement systems edmundo corona c the handout getting ready to measure presented a couple of examples where the results of a static calibration were not su. Static characteristic an overview sciencedirect topics. Dynamic characteristics of instruments and measuring systems. Static characteristics describe the device performance at room conditions i.
Chapter ii general characteristics of measurement systems instrumentation and measurements \ lk\ 2009 1 chapter ii general characteristics of measurement systems now that you have decided what to measure, you have to decide which measurement system is more suitable for your experiment. Static characteristics and dynamic characteristics. Oct 09, 2015 therefore, the dynamic characteristics and transient behavior of the instrument is as important as the static behavior. Static characteristics refer to the characteristics of the system. Mece 3320 signal concepts a signal is the physical information about a measured variable being transmitted between a process and a measurement system characteristics of signals magnitude generally refers to the maximum value of a signal. The overall dynamic behaviour has been shown to be dominated by the. Static characteristics the performance criteria for the measurement of quantities that remain constant, or vary only quite slowly. Static dynamic characteristics free download as powerpoint presentation. Static characteristics the static characteristics of an instrument are required to be considered for the instruments which measure unvarying process conditions. The observer must understand these filter effects in order to be able to remove them and truly estimate the statistics of the environment. Introduction he distinguishing feature of the present stage of development of measuring equipment is the expansion of the area of application of instruments. Dynamic characteristics of spindle with waterlubricated.
Static and dynamic characteristics of instrumentation measurement is the process by which relevant information about a system of interest is interpreted using the human thinking ability to define what is believed to be the new knowledge gained. Jul 27, 2017 characteristics of measurement systems the system characteristics are to be known, to choose an instrument that most suited to a particular measurement application. The behaviour of the system under such conditions is dealt by the dynamic response of the system and its dynamic characteristics of electrical measuring instruments are given below. Compared with the calibration method of suspension quality, this novel calibration method is different because the verification device is a springmass system.
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