The, b) Using a thermocouple type meter radio frequency (RF) voltage or current can be, c) Using a thermistor in a resistive bridge network, expanded scale for power line voltage, The basic d.c. voltmeter is nothing but a permanent magnet moving coil (PMMC) 0', Arsonval galvanometer. In these instrument an accuracy of + or – 10mm per km can be obtained. 8.9 Field Procedure of Electronic Distance Measurement 8.10 Geometry of Electronic Distance Measurements 8.11 EDM without Reflecting Prisms (Reflector Less Measurements) 2. To simplify the procedures to obtain accuracy in surveying, the electronic distance measuring method was introduced. Microwave Instruments. Although these type of instrument used to measure up to a maximum distance of 3 – 5km, many civil engineering works limited to this distance. An electrical or electronic signal can be amplified, filtered, multiplexed, sampled and measured. Distomats and electronic tacheometer or total station instruments falls under this category. Geodimeter falls under this type of instrument. Birla Institute of Technology & Science, Pilani - Hyderabad, EEE-III-ELECTRICAL AND ELECTRONICMEASUREMENTS AND INSTRUME [10EE35]-ASSIGNMENT, EEE-III-ELECTRICAL AND ELECTRONICMEASUREMENTS AND INSTRUME [10EE35]-SOLUTION, EEE-V-LINEAR ICS AND APPLICATIONS [10EE56]-SOLUTION, ece-iii-electronic-instrumentation-10it35-notes, EEE-V-MANAGEMENT AND ENTREPRENEURSHIP [10AL51]-SOLUTION, EEE-III-NETWORK ANALYSIS [10ES34]-ASSIGNMENT, Birla Institute of Technology & Science, Pilani - Hyderabad • EE 35, Birla Institute of Technology & Science, Pilani - Hyderabad • EEE 101, GITAM Centre for Distance Learning • ECE 111, ECE-III-ELECTRONIC INSTRUMENTATION [10IT35]-ASSIGNMENT, Birla Institute of Technology & Science, Pilani - Hyderabad • EEE 455, Birla Institute of Technology & Science, Pilani - Hyderabad • ECE 101, Copyright © 2021. For example if you want to measure voltage using ATmega8 micro-controller and want to display the output on computer screen then you have to go through the whole process. Course Hero, Inc. How To Use A Laser Distance Measure . This powerful grouping of features gives surveyors the ability to measure vertical … It can work in any adverse conditions. Types of Electronic Distance Measurement Instrument. I’ll explain this advantage using an example of voltage measurement . Advantages & Disadvantages of Level Measurement Systems like ultrasonic level transmitters, float level measurement, Displacer level instruments, Pressure based level measurement. Different physical quantities can be converted into electrical signal by transducers. Compact in size and more reliable in operation. Electrical signal can amplified, multiplexed, filtered and measured easily. Infrared Wave Instruments. The use of infrared instrument is high in civil engineering surveying as they are inexpensive and more accurate when compare to the rest. The time it took for the sound wave to return is used as the measurement of the distance bet… The, Electronic Measurements & Instrumentation. Another big advantage of Arduino is its library of examples present inside the software of Arduino. 7. Laser Measuring Device . The instrument is d.c. b) Using series resistance called multiplier, d.c. voltage can be measured. Such instruments were invented as early as 1950 in South Africa by Dr. T.L. It has higher sensing distance (in centimeters and inches) compare to inductive/capacitive proximity sensor types. Here the electronic distance measuring equipment and a reflector are necessary to carry out the survey. Here primary equipment is used as light wave emitting instrument and corner cube prisms are used as reflectors. This preview shows page 29 - 31 out of 81 pages. Course Hero is not sponsored or endorsed by any college or university. Most all total stations on the market today provide surveyors with an electronic distance measuring device (EDM), a digital theodolite and lots of computing horsepower and memory. Top 6 advantages and disadvantages of total station. Sound waves are then bounced off and reflected back towards the ultrasonic sensor 4. Advantages of Electronic Measurement The advantages of an electronic, The advantages of an electronic measurement are, 1. The present EDM instruments have the following features, absolute circle reading, laser plummet, endless drives, 30 x magnifications, high resolution LCD display, Upload and transfer data, data editing and exchange and connectivity to 3rd party devices. This movement of coil is called. 6. But, for any, measurement, a well defined set of standards and calibration units is essential. They need only to be placed in one area and faced toward a hard surface of another area to correctly gauge a distance. Hence, if atmospheric temperature and pressure is applied, the microprocessor applies suitable correction to the measurements. The surveying equipment functions with the help of micro waves come under this category. In distomat, the instrument should be focused to the reflector distomat to receive, monitor and reflect back the wave signal. Here the distance is measured with the help of electro-magnetic waves such as micro wave, infra red wave and other similar waves. The instrument. Total Station Surveying instrument combining Electronic Distance Measurement Equipment (EDME) with a digital theodolite and electronic data recording. Distance measurements can be made in two modes: [1] with a reflector using an Infrared or visible laser electromagnetic wave and phase measurement or [2] ‘reflectorless’ using a … The wave emitted from the electronic distance measuring equipment reaches the reflector and return back to the electronic distance measuring equipment. Many ETIs have coaxial electronic and optical systems, thus The slope distances can then be instantly converted to horizontal and vertical components. Electronic circuits can detect and amplify very weak signals and can measure the, 7. Visible Light Wave Instruments. The distance measurement is obtained using electro-optical range finders. D'Arsonval movement and basic meter is called D'Arsonval galvanometer. This sensor is not affected due to atmospheric dust, rain, snow etc. 2.1.2. The instrument can be used to measure horizontal and vertical angles as well as sloping distance of object to the instrument. Tellurometer uses the above mentioned technique, the phase comparison of wave to determine the distance. Greater flexibility. The instrument is, Electrical and Electronic Measurements& Instrumentation, a) Using a rectifier, a.c. voltages can be measured, at power and audio frequencies. Line-of-visibility between the aircraft and ground station is required. It is the most famous software for surveying purposes. To make a simple distance measurement using a laser measure the user must place the instrument at one end of the line that is to be measured and aim the laser beam at a solid target such as a wall or cabinet. Many measurements can be carried either simultaneously or in rapid succession. characteristics of an instrument and different calibration standards. 2.1.5. Micro wave signals are radiated from primary source equipment to the reflector and then the reflector amplifies the micro wave signals to send them back to the primary source equipment in exact phase as they emitted from. The one and only main consideration in this type is the alignment of equipment as the reflected wave travel parallel to the emitted wave which means the divergence of emitted wave is less than that of one degree. The measurement can easily be obtained in or converted into digital form for automatic, 4 The measured signals can be transmitted over long distances with the help of cables or. These instruments consume less power.   Terms. Larger homes/buildings require a stake, marking flag, or second person; Sagging or slight angle of the tape can interfere with accuracy . radio links, without any loss of information. Wadley ... 2. Measure The slope measurement is accomplished by simply pressing the measure button The displays are either liquid crystal (LCD) or light emitting diode (LED) The measurements is shown in two decimals of a foot or three decimals of a meter EDM with built in calculators can now be used to compute horizontal and vertical distances, coordinate, atmosphiric,curveture and prism constant … This highly portable instrument works on 12 to 24 volt batteries and can be used day or night. A total station is a combination of an electronic theodolite, an electronic distance measuring device (EDM) and a micro processor with memory unit. Circle imperfections are thus compensated for, permitting higher precision with only one circle setting. 3. By using this instrument it is possible to find out the coordinates of a reflector adjusting the cross hair of the instrument and at the same time measuring the vertical angles, horizontal angles, and slope distances. Ultrasonic Distance Measurement is a useful tool in various applications lately. EDM instruments are highly reliable and convenient pieces of surveying equipment and can be used to measure distances of up to 100 kilometers. The total travel time is measured by the electronic timing circuit. Normally these used to measure long distances within 100km with their frequency range. The main difference in all these technologies is the type of pulse that is used for measurement. Electronic measurement makes possible to build analog and digital signals. Various software are available in the market which can be use… The main advantage with laser tape measures is the speed at which they work. In this method two equipment and two operators needed to carry out the procedure. With a single touch the instrument displays the distance on the screen after measures the five modulation frequencies of infrared wave signal. 2.1.4. Most of the quantities can be converted by transducers into the electrical or electronic signals. 3. The electronic distance measuring equipment is differentiated into three types as, microwave instrument, infra red equipment and light wave equipment. The electronic distance measuring equipment is differentiated into three types as, microwave instrument, infra red equipment and light wave equipment. 3. Following are the advantages of Ultrasonic sensor: It has sensing capability to sense all the material types. This lets the combined machine automatically record angles and slope distance from just one set-up. Distance= Velocity X time. A basic d.c. meter uses a motoring principle for its operation. 3. 8. 1. 1. The surveying equipment functions with the help of micro waves come under this category. An electronic digital theodolite can be combined with an electronic distance measurement instrument. The instruments need only 12 to 24 V batteries. 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