Electronic distance measurement electronic distance. The following techniques are available for distance measuring, in order of their accuracy. Foxit phantompdf makes it easy to measure distances and areas of objects in pdf documents with our measure tools. Measuring by microwave devices the microwave distance measuring device fig. Accuracy analysis and calibration of total station based on. Cara penggunaan edm adalah dengan meletakan edm pada suatu titik dan reflektor diletakkan pada titik yang lain. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required. It is excellently suited as a text for undergraduate and graduate students and an invaluable reference for practicing surveyors, geodesists and other scientists. Functional principles of electronic distance meters are introduced and. It comprises an extensive collection of essential formulae, useful tables and numerous literature references.
Absolute baseline for testing of electronic distance meters. Electronic distance measuring instrument is a surveying instrument for measuring distance electronically. The hhdm is the perfect accessory for omegas os530 infrared pyrometer. A free powerpoint ppt presentation displayed as a flash slide show on id. This design is intended as a reference design for building automation and weigh scale applications.
Forensic science electronic distance measuring edm device. System of electronic distance measurement have two systems. Ets untuk electronic distance meter edm atau alat pengukur jarak tanpa reflector. Electronic distance measurement wavelength infrared. Pdf the theoretical part of the paper is concerned with length measuring methods. The roman pace was measured from the heel of the foot. 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. Electronic distance measurement, aka edm, is used in eight field events. Electronic distance measurement edm by sabri safee on. Electronic distance measurement edm is a fundamental feature of modern surveying total stations. Measurement of distance is accomplished with a modulated infrared carrier signal, generated by a small. 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.
Important operations of total station distance measurement. Electronic distance measurement measuring distance. Electronic distance measurement physics and application to structural engineering research j. Electronic distance measuring instrument is a surveying instrument for measuring distance electronically between two points through electromagnetic waves. Calibration of electronic distance measurement instruments. Active methods use unilateral transmission and passive reflection. Microwave systems range up to 150 km wavelength 3 cm not limited to line of sight unaffected by visibility light wave. Enter your mobile number or email address below and well send you a link to download the free kindle app. 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. These tools are especially useful when youre creating manuals, instructional guides, forms, and computeraided design cad drawingsor when you want to measure areas of any document before sending to a professional printer. Forensic science electronic distance measuring edm.
How to measure distances and areas in pdf documents. D i s t a n c e m e a s u r e m e n t principle of operation. Rueger is currently an associate professor at the school of geomatic engineering, university of new south wales, sydney, australia. Edm instruments introduction edm are now the prime measuring device for land surveyors and others.
Electronic distance measuring tools laser, ultrasonic. The accuracy of the ets reflectorless distance for the building wall target. Values determined in test measurements also reflect the degree of wear of tools and point to necessity of control of used equipment. 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. Electronic distance measurement free download as powerpoint presentation. Perjalanan gelombang dari satu ujung garis ke ujung yang lain dan kembali. Electronic distance measurement edm is a method of determining the length between two points, using phase changes, that occur as electromagnetic energy waves travels from one end of the line to the other end. Electronic distance measuring instruments sciencedirect. Howerver you can also get some good free information online, like here. Electronic distance measurement edm by sabri safee on prezi. 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. Edm biasa, masa pergerakkan gelombang adalah di dalam lingkungan 1 x. It is one of the oldest methods of measurement, and was used extensively by the romans.
Ppt electronic distance measurement powerpoint presentation. A total station ts or total station theodolite tst is an electronicoptical instrument used for surveying and building construction. Mar 09, 2017 electronic distance measurement edm report 1. Electronic distance measurement edm is a method of determining the length between two points using electromagnetic waves. Electronic distance measuring edm instrument is a major part of total station. Edm electronic distance meter,applications,advance survey instrument. Gupta, a course in electronic and electrical measurements, s. An electronic distance measurer edm can be used to place objects or points in three dimensions in relation to the unit. The sensitivity of measurement is therefore the slope of the straight line drawn on fig. Electronic distance measurement an introduction jean m. 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. 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. 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.
Can measure distance until 100 km in bright weather condition. 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. In most events, a tape measure is used to make the measurements, but the process of. In the construction field, the usage of electronic measuring device is still not. For consultation and interpretation of components, devices and electrical and electronic circuit. Electronic instrumentation and measurements is designed as a textbook for undergraduate students of electrical, electronics, and instrumentation disciplines. A series of measurements on a baseline can also be used to check the performance and.
Pacing is a simple means of measuring linear distance by walking. Pengaruh jenis target sasaran bidikan pada pengukuran jarak. Custom electronics and a microprocessor then convert elapsed time into a distance measurement and display it on the lcd. This wavelength has sufficient energy so it is not absorbed and lost in the atmosphere and has a small enough wavelength that it is easily reflected with a simple mirror. Electromagnetic distance measurement edm definition the electronic distance measurement instrument edm is a relatively new development in the field of surveying. Electronic distance measurement how is electronic distance measurement abbreviated. Distance and weight measurement using inductive sensing. Electronic distance measurement an introduction fourth edition with 56 figures and 18 tables springer. Notes on electronic distance measurement mygeodesy.
Pengukuran secara manual akan sedikit rumitjikajarak. The largest collection of symbols in the network in pdf format. 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. For the test of the eccentricity of the carrier tribrach with a carrier was accurately levelled. A decent book, covers much of the basic principles in electronic distance measurement. Basic principle electronic distance measurement use modulated. The edm emits a beam of infrared light that is modulated at a controlled rate. The distance and weight measurement using inductive sensing reference design is a subsystem design which converts a distance measurement to a weight measurement. The waves are reflected from another device at the other end back to the transmitter. Total station in surveying operation, uses and advantages. Dan didalam pengolahan hasil pengukuran edm harus memperhatikan beberapa hal. The hhdm electronic distance measurement tool sends out narrow beams of sound waves that bounce off solid objects back to the handheld receiver.
Metode edm metode ini dapat juga digunakan dalam pengamatan deformasi gunungapi. Gunung merapi adalah gunung berapi di bagian tengah pulau jawa dan merupakan salah satu gunung api teraktif di indonesia. It is an electronic transit theodolite integrated with electronic distance measurement. Prinsip kerja edm electronic distance measurement adalah dengan memancarkan sinar reflektor jarak yang akan memantulkan kembali sinyal tersebut ke edm. Electronic distance measurement edm linkedin slideshare. Electronic distance measurement instrument types, functions. Ultra dimension master 50 3344 ultrasonic tape measure with laser pointer. Edm electronic distance measurement adalah alat yang digunakan untuk menentukan panjang, menggunakan perubahan fase yang terjadi sebagai energi elektromagnetik yang diketahui panjang gelombangnya. The waves are compared and electronically changed into a visually readable form from which the distance between the units can be computed. It presents a comprehensive treatment of the operation, performance, applications, and limitations of both digital and analog instruments, normally encountered in an electronics laboratory. Introduction an electronic distance measurement edm instrument is calibrated on a baseline to determine instrument constants and errors. 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. In the past, the effect of liquid water on electronic distance measurement edm in rain has been ignored.
Electronic distance measurement edm is a method of determining the length between two points, using phase. Measuring by microwave devices the microwave distancemeasuring device fig. 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. It isnt really a gun, but rather a sophisticated laser that can measure very precisely the time it takes for a laser beam to make the roundtrip from the gun to the reflectors, and back.
Great emphasis is placed on the understanding of measure ment principles and on proper reduction and calibration pro cedures. It is an electronic transit theodolite integrated with electronic distance measurement edm to measure both vertical and horizontal angles and the slope distance from the instrument to a particular point, and an onboard computer to collect data and perform. Micro wave system electro optic system micro wave system carrier wave frequency used is 10 ghz. Older methodologies that use a set of known information usually distance or target sizes to make the measurement. Electronic distance measurement in general is a term used as a method for distance measurement by electronic means. In most events, a tape measure is used to make the measurements, but the process of getting accurate measurements is troublesome, time consuming and not always entirely accurate. Mar 23, 2017 electronic distance measurement edm 1.
Calibration of electronic distance measurement instruments last updated august 2017 1. Electronic distance measurement page 1 electronic distance measurement electronic distance measurement, aka edm, is used in eight field events. Ken snelgrove lect 8 sept 2607 slide 1 of 8 electronic distance measurement electronic distance measurement edm error. Active rangefinding methods include laser, lidar, radar, sonar and ultrasonic rangefinding other devices measure distance using trigonometry are stadiametric, coincidence and stereoscopic rangefinders. The device can measure distances between two direct points or remote ones may include radial or continuous distances. Pdf is also an abbreviation for the netware printer definition file. 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. Alat mengukur jarak adalah peralatan yang digunakan untuk mengukur jarak di antara dua tempat atau lebih. 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. Also, the main parts of the total station were explored and the students were. Using electronic distance measurement instruments in ndt and. Other devices measure distance using trigonometry are stadiametric, coincidence and stereoscopic rangefinders. Electronic distance measurement instrument types, functions, uses.