SU51308A1 - Instrument for measuring small deformations, in particular for the calibration of strain gauges - Google Patents
Instrument for measuring small deformations, in particular for the calibration of strain gaugesInfo
- Publication number
- SU51308A1 SU51308A1 SU186100A SU186100A SU51308A1 SU 51308 A1 SU51308 A1 SU 51308A1 SU 186100 A SU186100 A SU 186100A SU 186100 A SU186100 A SU 186100A SU 51308 A1 SU51308 A1 SU 51308A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- strain gauges
- calibration
- instrument
- measuring small
- small deformations
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
Одним из наиболее простых и вместе с тем наиболее надежных приемов измерени деформаций в элементах металлических дерев нных и тому подобных конструкций вл етс работа с тензометрами типа Гугенбергера и им подобными. Однако, достижение необходимой точности измерени , требует частой проверки и тарировки этих приборов.One of the simplest and at the same time the most reliable methods of measuring deformations in elements of metallic wooden structures and the like is the work with strain gauges of the Huguenberger type and the like. However, achieving the required measurement accuracy requires frequent testing and calibration of these devices.
С этой целью пользуютс преимущественно весьма дорогими оптическими приборами и машинами, как например, Цейсса, Потона, Хорта и др. Неоднократно делались попытки упростить тарировку, но так как эти попытки основывались на механических принципах, то они не давали необходимой точности из-за мертвого хода и неточности изготовлени винтов и направл ющих салазок. Стоимость такого рода машин также весьма высока. Согласно насто щему изобретению предлагаетс прибор дл тарировки тензометров, отличающийс от существующих отсутствием взаимоперемещающихс деталей с винтовыми парами. Предлагаемый прибор основан на тепловом расширении тел.For this purpose, they predominantly use very expensive optical instruments and machines, such as Zeiss, Poton, Hort, and others. Attempts have been made to simplify calibration, but since these attempts were based on mechanical principles, they did not give the necessary accuracy due to the dead stroke and inaccuracies in the manufacture of screws and slide rails. The cost of this kind of machines is also very high. In accordance with the present invention, an instrument for calibrating strain gauges is proposed that differs from the existing ones by the absence of interchangeable parts with screw pairs. The proposed device is based on thermal expansion of bodies.
На череже фиг. 1 изображает вид сбоку предлагаемого прибора с частичным его разрезом; фиг. 2 - вид его сверху; фиг. 3 - установку тензометров при их тарировке.In addition, FIG. 1 depicts a side view of the proposed device with its partial cut; FIG. 2 - view from above; FIG. 3 - installation of strain gauges when calibrating them.
Основой прибора вл етс серебр на или иного металла трубка 4, монтированна на стойке 5. Внутри трубки заложен нагревательный элемент 5, питаемый от аккумул торной батареи. В теле трубки 4 просверлен канал, в котором помещаетс термопара 2, расположенна по изотерме. Гор чий спай термопары укреплен в лунке в центре трубки. Холодный спай помещаетс в дюаровском сосуде со льдом. В цепь термопары включаетс стрелочный или зеркальный гальванометр.The basis of the device is silver on one or another metal tube 4 mounted on a rack 5. Inside the tube there is a heating element 5 fed from a rechargeable battery. A channel is drilled in the body of the tube 4, in which the thermocouple 2 is placed, located along the isotherm. The thermocouple hot junction is fixed in the well in the center of the tube. The cold junction is placed in a Douar vessel with ice. An analog or mirror galvanometer is included in the thermocouple circuit.
Процесс тарировки осуществл етс следующим образом. На трубку монтируютс сразу два тензометра (при большей трубке и большее число тензометров), как это показано на чертеже (фиг. 3), затем включаетс ток. Трубка, нагрева сь, расшир етс , перемеща призму ножки тензометра, а значит и его стрелку по шкале. Одновременно растет температура спа термопары, и гальванометр в ееThe calibration process is carried out as follows. Two strain gauges are mounted on the tube at once (with a larger tube and a greater number of strain gauges), as shown in the drawing (Fig. 3), then the current is turned on. The tube, when heated, expands, moving the prism of the foot of the strain gauge, and hence its arrow on the scale. At the same time, the temperature of the thermocouple spa increases, and the galvanometer in its
цепи отмечает температуру. По температуре суд т об удлинении трубки. Можно пользоватьс известными коэфициентами линейного расширени металла или предварительно протарировать гальванометр по точному тензометру . Измер ть температуру можно и более чувствительными методами, например, термометром сопротивлени в плече моста Уитстона.The chain marks the temperature. The temperature is judged on the elongation of the tube. You can use the known coefficients of linear expansion of the metal or pre-grout the galvanometer using an accurate strain gauge. Temperature can also be measured by more sensitive methods, such as a resistance thermometer in the shoulder of a Wheatstone bridge.
Предмет изобретени .The subject matter of the invention.
Прибор дл измерени малых деформаций , в частности, дл тарировки тензометров, отличающийс тем, что в качестве органа, осуществл ющего малые смещени , применена нагреваема , например, электрическим током металлическа или иного материала трубка 4 или стержень.A device for measuring small deformations, in particular for the calibration of strain gauges, characterized in that a tube 4 or a rod heated by, for example, an electric current of metal or other material, is used as the organ performing small displacements.
фиг. 2 ,.: у, ф-нг 5 V.FIG. 2,.: Y, f-ng 5 V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU186100A SU51308A1 (en) | 1936-02-03 | 1936-02-03 | Instrument for measuring small deformations, in particular for the calibration of strain gauges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU186100A SU51308A1 (en) | 1936-02-03 | 1936-02-03 | Instrument for measuring small deformations, in particular for the calibration of strain gauges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU51308A1 true SU51308A1 (en) | 1936-11-30 |
Family
ID=48363910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU186100A SU51308A1 (en) | 1936-02-03 | 1936-02-03 | Instrument for measuring small deformations, in particular for the calibration of strain gauges |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU51308A1 (en) |
-
1936
- 1936-02-03 SU SU186100A patent/SU51308A1/en active
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