Electronic distance measuring method edm basic civil. It is used to delay signal for sometime in the vertical section. Electronic distance measurement edm by sabri safee on prezi. The sensitivity of measurement is therefore the slope of the straight line drawn on fig. The list of acronyms and abbreviations related to edm electronic distance measurement.
Electronic distance measurement instrument types, functions, uses. The principle of operation is the same among various edm devices such as the stand alone edm device, the theodolite mounted edm. Click on the below links to download written notes 1. Gupta, a course in electronic and electrical measurements, s. Electronic distance measurement could be covere d up by both direct and indirect mea s urement but more often it is detached separately because of its advanced technology and great importance.
Measurement number me as u r e m ent r a n g e range uclr msa short term stability chart 0. Reflectorless laser distance measurement gim international. The device can measure distances between two direct points or remote ones may include radial or continuous distances. Leica 1201 total station instruments have standard deviation of 0. Here the distance is measured with the help of electromagnetic waves such as micro wave, infra red wave and other similar waves. It presents a comprehensive treatment of the operation, performance, applications, and limitations of both digital and analog instruments, normally encountered in an electronics laboratory. Older methodologies that use a set of known information usually distance or target sizes to make the measurement, have been in regular use since the 18th century. Electronic distance measurement an introduction jean m. Electronic instrumentation and measurements is designed as a textbook for undergraduate students of electrical, electronics, and instrumentation disciplines. Forensic science electronic distance measuring edm device. Pacing is a simple means of measuring linear distance by walking.
At the same time, it is a comprehensive refer ence book for all surveyors as well as for other professionals and scientists who use electronic distance measurement as a measuring tool. Electronic distance measurement edm linkedin slideshare. Electronic distance measurement in general is a term used as a method for distance measurement by electronic means. Distance measurement by electronic method based on hardwired algorithm relay on propagation, reflection and subsequent reception of electromagnetic wave electronic angle measurement combined the function of. This is a wide band amplifier used to amplify signal in the vertical section of the signal. Older methodologies that use a set of known information usually distance or target sizes to make the measurement. Pdf electronic distance measurement an introduction. Sep 15, 2019 this is bicycle distance meter circuit or measure the distance by use bicycle wheel as main tool and normal electronic circuits and so important parts are reed switch detect a magnetic force to cd4017 as decade counter with 10 decoded outputs ic then connected to optocoupler 4n26, and display to a frequency counter. History of distance measurement before computer and electronic technology exist, conventional equipment are used to get a distance. Active rangefinding methods include laser, lidar, radar, sonar and ultrasonic rangefinding other devices measure distance using trigonometry are stadiametric, coincidence and stereoscopic rangefinders.
This is the view from behind a cluster of edm reflectors looking back towards the edm gun. Electronic distance measurement edm is a fundamental feature of modern surveying total stations. Prinsip kerja edm electronic distance measurement adalah dengan memancarkan sinar reflektor jarak yang akan memantulkan kembali sinyal tersebut ke edm. In most events, a tape measure is used to make the measurements, but the process of. Measuring by microwave devices the microwave distancemeasuring device fig. Edm electronic distance measurement adalah alat yang digunakan untuk menentukan panjang, menggunakan perubahan fase yang terjadi sebagai energi elektromagnetik yang diketahui panjang gelombangnya. Electronic distance measurement edm by sabri safee on. Distance measurement software free download distance measurement top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices.
Electronic distance measurement edm is a method of determining the length between two points, using phase. Electronic distance measurement page 1 electronic distance measurement electronic distance measurement, aka edm, is used in eight field events. A total station ts or total station theodolite tst is an electronicoptical instrument used for surveying and building construction. Electronic distance measurement instrument types, functions. Troubleshooting the rem measurement the only numerical input is the target height so make sure that is entered correctly. On accuracy specifications of electronic distance meter. Important operations of total station distance measurement. It is an electronic transit theodolite integrated with electronic distance measurement. When th is changed make sure you hit the ok function key. Surveying with gps, total station and terresterial laser scaner diva. The accuracy of measurement varies from 5 mm to 10 mm per km measurement. This experiment on electronic distance measurements edm introduces students to a very accurate and precise measuring device called the edm, also known as the total station. When data is downloaded from a total station onto a computer, application software can be used to compute.
Read electronic distance measurement an introduction online, read in mobile or kindle. Notes on electronic distance measurement mygeodesy. During use, the light beam is emitted from the edm, reflected off a prism or target held at a point to be mapped, and bounced back to the edm. Total station setup and operation university of south alabama. Basic principle electronic distance measurement use modulated infrared. In this book, the author explains very briefly by using simple language. It is one of the oldest methods of measurement, and was used extensively by the romans. A decent book, covers much of the basic principles in electronic distance measurement. Reflectorless electronic distance measurement edm enables the measurement of distances of up to hundreds of metres without needing to. It is excellently suited as a text for undergraduate and graduate students and an invaluable reference for practicing surveyors, geodesists and other scientists. Please send me the pdf for electronic and intrumentation measurement by david a. Ultra dimension master 50 3344 ultrasonic tape measure with laser pointer. Forensic science electronic distance measuring edm. The edm emits a beam of infrared light that is modulated at a controlled rate.
Total station in surveying operation, uses and advantages. Electronic distance measuring instrument is a surveying instrument for measuring distance electronically. The electronic distance meter edm is an essential surveying tool. Electronic distance measuring edm instruments introduction edm are now the prime measuring device for land surveyors and others. Microwave systems range up to 150 km wavelength 3 cm not limited to line of sight unaffected by visibility light wave. Performance characteristics, static characteristics, accuracy, precision, resolution, types of errors, gaussian error, root sum squares formula. As long as our distances are shorter than 10 m twoway travel, we can measure with millimeter precision as long as both the wave generator and phase detector electronic can operate to 4 significant figures. Electronic distance measurement edm is a method of determining the length between two points using electromagnetic waves. Moreover, the total station can be used to measure both vertical and horizontal distances.
The roman pace was measured from the heel of the foot. Mar 23, 2017 electronic distance measurement edm 1. Other devices measure distance using trigonometry are stadiametric, coincidence and stereoscopic rangefinders. Geodesy, metrology, electronic distance measurement, electronic distance meter, reflecting. Electronic distance measuring edm instrument is a major part of total station. Active methods use unilateral transmission and passive reflection. The instrument sends out a beam of light or high frequency microwaves from one end of line to be measured, and directs it towards the far end of the line. Feb 10, 2017 calibration of electronic distance measurement device edm calibration with 1m length take.
This totally revised third edition of a text first. A free powerpoint ppt presentation displayed as a flash slide show on id. An electronic distance measurer edm can be used to place objects or points in three dimensions in relation to the unit. Aug 16, 2017 electronic distance measurement edm instruments, such as laser trackers, total stations, and handheld laser distance meters, have been used in a limited number of nondestructive testing ndt and structural health monitoring shm applications attempting to measure bridge deflections and vibrations. Total station setup and operation university of south.
The edm device is widelyused across the globe to measure the distances between two points. Methods for measuring distances electric distance measurement edm distances are measured electronically by determining the number of full and partial waves of transmitted electromagnetic energy that are required in traveling the distance between the edm and a prism. Cara penggunaan edm adalah dengan meletakan edm pada suatu titik dan reflektor diletakkan pada titik yang lain. At the same time, it is a comprehensive refer ence book for all surveyors as well as for other professionals and scientists who use electronic distance measurement. Bridges the above notes covers below topics unit i. Metode edm metode ini dapat juga digunakan dalam pengamatan deformasi gunungapi. Edm is also used routinely for measuring field event performances and checking the heights of the bar in the high jump and pole vault events at major track and field competitions. In this method instruments are used to measure distance that rely on propagation, reflection and reception of electromagnetic waves like radio, visible light or infrared waves. Great emphasis is placed on the understanding of measure ment principles and on proper reduction and calibration pro cedures. Electronic distance measurement measuring distance. Electronic distance measuring instruments sciencedirect. For consultation and interpretation of components, devices and electrical and electronic circuit.
Electronic distance measuring tools laser, ultrasonic. Offset point can be in front or behind target, but must be on the same azimuth line. The largest collection of symbols in the network in pdf format. It is used to generate sawtooth voltage which it is applied to. Electronic distance measuring edm instruments introduction. In any case the personteam holding the target must have a tape to measure the exact distance to cm. Edm electronic distance meter,applications,advance survey instrument. Electronic distance measurement physics and application to structural engineering research j. The following techniques are available for distance measuring, in order of their accuracy. This is bicycle distance meter circuit or measure the distance by use bicycle wheel as main tool and normal electronic circuits and so important parts are reed switch detect a magnetic force to cd4017 as decade counter with 10 decoded outputs ic then connected to optocoupler 4n26, and display to a frequency counter. For the test of the eccentricity of the carrier tribrach with a carrier was accurately levelled. In the past, the effect of liquid water on electronic distance measurement edm in rain has been ignored.
It is excellently suited as a text for undergraduate and graduate students and an invaluable reference for practicing surveyors, geodesists and other scientists using edm as a measuring tool. Download electronic distance measurement an introduction ebook free in pdf and epub format. Values determined in test measurements also reflect the degree of wear of tools and point to necessity of control of used equipment. To simplify the procedures to obtain accuracy in surveying, the electronic distance measuring method was introduced. Electronic measuring instrumentation written notes free. Rueger is currently an associate professor at the school of geomatic engineering, university of new south wales, sydney, australia. Electronic measurements and instrumentation textbook free download electronic measurements and instrumentation emi textbook is one of the famous books for engineering students.
Absolute baseline for testing of electronic distance meters. Here the electronic distance measuring equipment and a reflector are necessary to carry out the survey. Displacement sensors measurement sensors omron industrial. Ppt electronic distance measurement powerpoint presentation. Electromagnetic distance measurement edm definition the electronic distance measurement instrument edm is a relatively new development in the field of surveying. The waves are compared and electronically changed into a visually readable form from which the distance between the units can be computed. Single distance offset point can be right or left of the target, but must be the same distance from the instrument. This lab experiment was aimed to show the students how to use the edm electronic distance measurement machine that is used to measure distances between two points precisely and accurately. This manual is a revision of the engineering survey chapter of the 1969. Electronic distance measurement free download as powerpoint presentation. Perjalanan gelombang dari satu ujung garis ke ujung yang lain dan kembali. Distance measurement software free download distance.
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