SU1134669A1 - Apparatus for continuous monitoring of soil compacting degree - Google Patents
Apparatus for continuous monitoring of soil compacting degree Download PDFInfo
- Publication number
- SU1134669A1 SU1134669A1 SU833647623A SU3647623A SU1134669A1 SU 1134669 A1 SU1134669 A1 SU 1134669A1 SU 833647623 A SU833647623 A SU 833647623A SU 3647623 A SU3647623 A SU 3647623A SU 1134669 A1 SU1134669 A1 SU 1134669A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- soil
- sensor
- signal element
- photoelectric
- control
- Prior art date
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
УСТРОЙСТВО ДЛЯ ч/-; НОГО КОНТРОЛЯ СТЕНЕНИ УПЛОТН НИЯ ГРУНТА, содержащее подвижный штамп и измерительное приспособление, включающее в себ датчик величины осадки уплотн емого грунта, св занный с подвижным штампом, и сигнальный элемент, отличающеес тем, что, с целью повышени точности измерений п пГкч-чечени непрерывности контрол уп.ю- .и rpyirra, измерительное прис1юсобленпо cFia6 KeHO фотоэлектрическим электронным приб;ч1М с внешним фотоэффектом и .эЛ1 ис1 1ваюш1 м аппаратом , датчик величины осадки и.и-тн емого грунта выполнен в виде двух П; --:рачных трубок , соединенных гиоким 1чл.анго.; ;. ,;;;1юлненных рабочей жидкостью, i.j-; . одна трубка закреплена на оси подвижн()1Ч1 UITHMпа , а друга установлена в зоне фотоэлектриi ческого электронного прибора, соединенного с сигнальным элементом и записывающим (Л аппаратом.DEVICE FOR H / -; HEAD OF THE SOIL SEAL WALL CONTROL, containing a movable die and measuring device, including a sensor for precipitating compacted soil associated with a movable die, and a signal element, characterized in that, in order to improve the accuracy of the measurements of the continuity of control upyu and rpyirra, a measuring device with a cFia6 KeHO photoelectric electronic instrument; an external photoelectric effect and .el1 is1 1 you device, a sensor of the value of the precipitation and i.t. soil is made in the form of two П; -: the cancer tubes connected by hyokim of 1 hl. ango; ;. , ;;; 1 sprayed working fluid, i.j-; . one tube is fixed on the axis of the mobile () 1 × 1 UITHMp, and the other is installed in the zone of a photoelectric electronic device connected to the signal element and the recording (L device).
Description
uhfcf uhfcf
bmpbmp
01-501-5
I II I
оэoh
4 О4 o
схsc
соwith
Изобретение относитс к строительству, в частности к возведению земл ных дорожных насыпей, и может быть использовано дл контрол степени уплотнени грунтов.The invention relates to the construction, in particular to the construction of earth road embankments, and can be used to control the degree of compaction of soils.
Известно устройство дл контрол степени уплотнени сыпучего материала, содержащее вращающийс щтамп, выполненный в виде колеса с ободом, смонтированного на оси рычага, щарнирно соединенного с кронштейном 1.A device for controlling the degree of compaction of bulk material is known, comprising a rotating chip made in the form of a wheel with a rim mounted on an axis of a lever pivotally connected to the bracket 1.
Однако это устройство не позвол ет определ ть фактические значени достигнутой степени уплотнени грунта.However, this device does not allow the actual values of the degree of compaction of the soil to be determined.
Наиболее близким к предлагаемому вл етс устройство дл непрерывного контрол степени уплотнени грунта, содержащее подвижный щтамп и измерительное приспособление , включающее в себ датчик величины осадки уплотнительного грунта, св занный с подвижным штампом, и сигнальный элемент 2.Closest to the present invention is a device for continuously monitoring the degree of soil compaction, comprising a movable chip and a measuring device including a sensor for the amount of compaction of the compacted soil associated with the movable punch and a signal element 2.
Недостатками такого устройства вл ютс невысока точность измерений уплотнени грунта и невозможность производить непрерывный контроль в процессе уплотнени грунта.The disadvantages of such a device are the low accuracy of soil compaction measurements and the inability to perform continuous monitoring during the soil compaction process.
Цель изобретени - повышение точности измерений и обеспечение непрерывности контрол уплотнени грунта.The purpose of the invention is to improve the measurement accuracy and ensure the continuity of monitoring of soil compaction.
Поставленна цель достигаетс тем, что в устройстве дл непрерывного контрол степени уплотнени грунта, содержащем подвижный щтамп и измерительное приспособление , включающее датчик величины осадки уплотн емого грунта, св занный с подвижным штампом, и сигнальный элемент, измерите.чьное приспособление снабжено фотоэлектрическим электронным прибором с внещним фотоэффектом и записывающим аппаратом, датчик величины осадки уплотн емого грунта выполнен в виде двух прозрачных трубок, соединенных гибким шлангом и заполненных рабочей жидкостью, причем одна трубка закреплена на оси подвижного штампа, а друга установлена в зоне фотоэлектрического электронного прибора , соединенного с сигнальным элементом и записываюшим аппаратом.The goal is achieved by the fact that in a device for continuous monitoring of the degree of soil compaction, containing a movable chip and a measuring device including a sensor for the amount of compacted soil precipitation associated with a movable punch and a signal element, measure the device with a photoelectric electronic device with an external photoelectric effect and recording apparatus, the sensor for the amount of precipitation of compacted soil is made in the form of two transparent tubes connected by a flexible hose and filled with working fluid In this case, one tube is fixed on the axis of the movable die, and the other is installed in the zone of a photoelectric electronic device connected to a signal element and a recording device.
На чертеже представлена схема устройства дл непрерывного контрол степени уплотнени грунта.The drawing shows a diagram of the device for continuous monitoring of the degree of soil compaction.
Устройство дл непрерывного контрол степени уплотнени грунта содержит датчик 1 величины осадки уплотн емого грунта, выполненный в виде двух прозрачных трубок соединенных гибким шлангом и заполненных 5 рабочей жидкостью до определенного уровн причем одна трубка закреплена на оси подвижного штампа 2 - рабочего органа катка, а друга трубка установлена в зоне фотоэлектрического электронного прибора 3,The device for continuous monitoring of the degree of compaction of the soil contains a sensor 1 of the precipitation value of the compacted soil, made in the form of two transparent tubes connected by a flexible hose and filled with 5 working fluid to a certain level, with one tube fixed to the axis of the movable punch 2 - the working body of the roller, and the other installed in the area of the photoelectric electronic device 3,
0 электрически соединенного с блоком 4 электропитани ,, с электролампой 5 подсветки рабочей жидкости, фотоэлектрическим прибором 3, а также с записывающим аппаратом 6 и сигнальным элементом 7. В зоне установки прибора 3 и размещени одной0 electrically connected to the power supply unit 4, with the electric fluid backlight bulb 5, the photoelectric device 3, as well as the recording device 6 and the signal element 7. In the installation zone of the device 3 and the placement of one
из трубок датчика 1 нанесена шкала 8 измерени величины осадка грунта. A scale 8 measuring the amount of soil sediment is applied from the tubes of sensor 1.
Устройство работает следующим образо.м. В процессе уплотнени грунта подвижный штамп 2, передава нагрузку на грунт.The device works as follows. In the process of compaction of the soil movable stamp 2, transferring the load on the soil.
0 производит осадку его на некоторую величину ДН,, при этом датчик 1 при помощи р бочей жидкости автоматически показывает на шкале 8 изменений величину осадки уплотн емого грунта. Предварительно на шкале 8 измерений величины осадки устанавливают фотоэлектрический электронный прибор 3 с внешним фотоэффектом на требуемую величину осадки , котора функционально св зана с требуемой степенью уплотнени грунта и определ етс по данным тад рировочных графиков или номограмм - плотность скелета грунта. При совпадении величины осадки уплотн емого грунта с требуемой величиной осадки фотоэлектрический электронный прибор 3 реагирует на свечение мениска рабочей жидкости, наход щейс 0 produces its settlement by a certain value of DN, while sensor 1 with the help of working fluid automatically shows on a scale of 8 changes the amount of precipitation of compacted soil. Preliminary, on a scale of 8 measurements of the precipitation value, a photoelectric electronic device 3 with an external photoelectric effect is set to the required precipitation amount, which is functionally related to the required degree of soil compaction and is determined according to tally graphs or nomograms — the skeleton density of the soil. If the amount of precipitation of the compacted soil coincides with the required precipitation amount, the photoelectric electronic device 3 responds to the glow of the working fluid meniscus located
5 в трубке датчика 1, при этом автоматически замыкает электроцепь, включает записывающий аппарат 6 и сигн;,:ьный э.темент 7, при этом записывающий аппарат фиксирует самописцем на ленте степень уплотнени грунта дл построени исполнительных гра фиков послойного уплотнени насыпей.5 in the sensor tube 1, this automatically closes the electrical circuit, turns on the recording apparatus 6 and the signal;,: 7, while the recording apparatus records the degree of soil compaction with the recorder on the tape to build the performance layers of the embankment.
Предлагаемое устройство позвол ет существенно повысить эффективность и качество контрол уплотнени земл ного полотна и полностью исключает трудоемкиеThe proposed device allows to significantly increase the efficiency and quality of control of the compaction of the earth bed and completely eliminates labor-consuming
5 операции по отбору npofi i рлнта и определению их водно-фпзичеокич .характеристик.5 operations for the selection of npofi i rlnt and the determination of their water-quality characteristics.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU833647623A SU1134669A1 (en) | 1983-09-30 | 1983-09-30 | Apparatus for continuous monitoring of soil compacting degree |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU833647623A SU1134669A1 (en) | 1983-09-30 | 1983-09-30 | Apparatus for continuous monitoring of soil compacting degree |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1134669A1 true SU1134669A1 (en) | 1985-01-15 |
Family
ID=21083720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU833647623A SU1134669A1 (en) | 1983-09-30 | 1983-09-30 | Apparatus for continuous monitoring of soil compacting degree |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1134669A1 (en) |
Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11079725B2 (en) | 2019-04-10 | 2021-08-03 | Deere & Company | Machine control using real-time model |
US11178818B2 (en) | 2018-10-26 | 2021-11-23 | Deere & Company | Harvesting machine control system with fill level processing based on yield data |
US11234366B2 (en) | 2019-04-10 | 2022-02-01 | Deere & Company | Image selection for machine control |
US11240961B2 (en) | 2018-10-26 | 2022-02-08 | Deere & Company | Controlling a harvesting machine based on a geo-spatial representation indicating where the harvesting machine is likely to reach capacity |
US20220110251A1 (en) | 2020-10-09 | 2022-04-14 | Deere & Company | Crop moisture map generation and control system |
US11467605B2 (en) | 2019-04-10 | 2022-10-11 | Deere & Company | Zonal machine control |
US11474523B2 (en) | 2020-10-09 | 2022-10-18 | Deere & Company | Machine control using a predictive speed map |
US11477940B2 (en) | 2020-03-26 | 2022-10-25 | Deere & Company | Mobile work machine control based on zone parameter modification |
US11592822B2 (en) | 2020-10-09 | 2023-02-28 | Deere & Company | Machine control using a predictive map |
US11589509B2 (en) | 2018-10-26 | 2023-02-28 | Deere & Company | Predictive machine characteristic map generation and control system |
US11635765B2 (en) | 2020-10-09 | 2023-04-25 | Deere & Company | Crop state map generation and control system |
US11641800B2 (en) | 2020-02-06 | 2023-05-09 | Deere & Company | Agricultural harvesting machine with pre-emergence weed detection and mitigation system |
US11650587B2 (en) | 2020-10-09 | 2023-05-16 | Deere & Company | Predictive power map generation and control system |
US11653588B2 (en) | 2018-10-26 | 2023-05-23 | Deere & Company | Yield map generation and control system |
US11675354B2 (en) | 2020-10-09 | 2023-06-13 | Deere & Company | Machine control using a predictive map |
US11672203B2 (en) | 2018-10-26 | 2023-06-13 | Deere & Company | Predictive map generation and control |
US11711995B2 (en) | 2020-10-09 | 2023-08-01 | Deere & Company | Machine control using a predictive map |
US11727680B2 (en) | 2020-10-09 | 2023-08-15 | Deere & Company | Predictive map generation based on seeding characteristics and control |
US11778945B2 (en) | 2019-04-10 | 2023-10-10 | Deere & Company | Machine control using real-time model |
US11825768B2 (en) | 2020-10-09 | 2023-11-28 | Deere & Company | Machine control using a predictive map |
US11844311B2 (en) | 2020-10-09 | 2023-12-19 | Deere & Company | Machine control using a predictive map |
US11845449B2 (en) | 2020-10-09 | 2023-12-19 | Deere & Company | Map generation and control system |
US11849671B2 (en) | 2020-10-09 | 2023-12-26 | Deere & Company | Crop state map generation and control system |
US11849672B2 (en) | 2020-10-09 | 2023-12-26 | Deere & Company | Machine control using a predictive map |
US11864483B2 (en) | 2020-10-09 | 2024-01-09 | Deere & Company | Predictive map generation and control system |
US11874669B2 (en) | 2020-10-09 | 2024-01-16 | Deere & Company | Map generation and control system |
US11889787B2 (en) | 2020-10-09 | 2024-02-06 | Deere & Company | Predictive speed map generation and control system |
US11889788B2 (en) | 2020-10-09 | 2024-02-06 | Deere & Company | Predictive biomass map generation and control |
US11895948B2 (en) | 2020-10-09 | 2024-02-13 | Deere & Company | Predictive map generation and control based on soil properties |
US11927459B2 (en) | 2020-10-09 | 2024-03-12 | Deere & Company | Machine control using a predictive map |
US11946747B2 (en) | 2020-10-09 | 2024-04-02 | Deere & Company | Crop constituent map generation and control system |
US11957072B2 (en) | 2020-02-06 | 2024-04-16 | Deere & Company | Pre-emergence weed detection and mitigation system |
US11983009B2 (en) | 2020-10-09 | 2024-05-14 | Deere & Company | Map generation and control system |
US12013245B2 (en) | 2020-10-09 | 2024-06-18 | Deere & Company | Predictive map generation and control system |
US12035648B2 (en) | 2020-02-06 | 2024-07-16 | Deere & Company | Predictive weed map generation and control system |
US12058951B2 (en) | 2022-04-08 | 2024-08-13 | Deere & Company | Predictive nutrient map and control |
US12069978B2 (en) | 2018-10-26 | 2024-08-27 | Deere & Company | Predictive environmental characteristic map generation and control system |
US12069986B2 (en) | 2020-10-09 | 2024-08-27 | Deere & Company | Map generation and control system |
US12082531B2 (en) | 2022-01-26 | 2024-09-10 | Deere & Company | Systems and methods for predicting material dynamics |
US12127500B2 (en) | 2021-01-27 | 2024-10-29 | Deere & Company | Machine control using a map with regime zones |
US12178158B2 (en) | 2020-10-09 | 2024-12-31 | Deere & Company | Predictive map generation and control system for an agricultural work machine |
US12229886B2 (en) | 2021-10-01 | 2025-02-18 | Deere & Company | Historical crop state model, predictive crop state map generation and control system |
-
1983
- 1983-09-30 SU SU833647623A patent/SU1134669A1/en active
Non-Patent Citations (1)
Title |
---|
1. Инструкци по определению требуемой плотности и контролю за уплотнением земл ного полотна автомобильных дорог вен 55-69, Минсстрой СССР. 2. Авторское свидетельство СССР № 222708, кл. Е 02 D 1/02, 1968. * |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US12010947B2 (en) | 2018-10-26 | 2024-06-18 | Deere & Company | Predictive machine characteristic map generation and control system |
US11178818B2 (en) | 2018-10-26 | 2021-11-23 | Deere & Company | Harvesting machine control system with fill level processing based on yield data |
US11672203B2 (en) | 2018-10-26 | 2023-06-13 | Deere & Company | Predictive map generation and control |
US11240961B2 (en) | 2018-10-26 | 2022-02-08 | Deere & Company | Controlling a harvesting machine based on a geo-spatial representation indicating where the harvesting machine is likely to reach capacity |
US11653588B2 (en) | 2018-10-26 | 2023-05-23 | Deere & Company | Yield map generation and control system |
US12171153B2 (en) | 2018-10-26 | 2024-12-24 | Deere & Company | Yield map generation and control system |
US12178156B2 (en) | 2018-10-26 | 2024-12-31 | Deere & Company | Predictive map generation and control |
US12069978B2 (en) | 2018-10-26 | 2024-08-27 | Deere & Company | Predictive environmental characteristic map generation and control system |
US11589509B2 (en) | 2018-10-26 | 2023-02-28 | Deere & Company | Predictive machine characteristic map generation and control system |
US11467605B2 (en) | 2019-04-10 | 2022-10-11 | Deere & Company | Zonal machine control |
US11650553B2 (en) | 2019-04-10 | 2023-05-16 | Deere & Company | Machine control using real-time model |
US11829112B2 (en) | 2019-04-10 | 2023-11-28 | Deere & Company | Machine control using real-time model |
US11234366B2 (en) | 2019-04-10 | 2022-02-01 | Deere & Company | Image selection for machine control |
US11079725B2 (en) | 2019-04-10 | 2021-08-03 | Deere & Company | Machine control using real-time model |
US11778945B2 (en) | 2019-04-10 | 2023-10-10 | Deere & Company | Machine control using real-time model |
US12035648B2 (en) | 2020-02-06 | 2024-07-16 | Deere & Company | Predictive weed map generation and control system |
US11641800B2 (en) | 2020-02-06 | 2023-05-09 | Deere & Company | Agricultural harvesting machine with pre-emergence weed detection and mitigation system |
US11957072B2 (en) | 2020-02-06 | 2024-04-16 | Deere & Company | Pre-emergence weed detection and mitigation system |
US11477940B2 (en) | 2020-03-26 | 2022-10-25 | Deere & Company | Mobile work machine control based on zone parameter modification |
US12225846B2 (en) | 2020-10-08 | 2025-02-18 | Deere & Company | Machine control using a predictive map |
US11864483B2 (en) | 2020-10-09 | 2024-01-09 | Deere & Company | Predictive map generation and control system |
US11675354B2 (en) | 2020-10-09 | 2023-06-13 | Deere & Company | Machine control using a predictive map |
US11844311B2 (en) | 2020-10-09 | 2023-12-19 | Deere & Company | Machine control using a predictive map |
US11845449B2 (en) | 2020-10-09 | 2023-12-19 | Deere & Company | Map generation and control system |
US11849671B2 (en) | 2020-10-09 | 2023-12-26 | Deere & Company | Crop state map generation and control system |
US11849672B2 (en) | 2020-10-09 | 2023-12-26 | Deere & Company | Machine control using a predictive map |
US11727680B2 (en) | 2020-10-09 | 2023-08-15 | Deere & Company | Predictive map generation based on seeding characteristics and control |
US11871697B2 (en) | 2020-10-09 | 2024-01-16 | Deere & Company | Crop moisture map generation and control system |
US11874669B2 (en) | 2020-10-09 | 2024-01-16 | Deere & Company | Map generation and control system |
US11889787B2 (en) | 2020-10-09 | 2024-02-06 | Deere & Company | Predictive speed map generation and control system |
US11889788B2 (en) | 2020-10-09 | 2024-02-06 | Deere & Company | Predictive biomass map generation and control |
US11895948B2 (en) | 2020-10-09 | 2024-02-13 | Deere & Company | Predictive map generation and control based on soil properties |
US11927459B2 (en) | 2020-10-09 | 2024-03-12 | Deere & Company | Machine control using a predictive map |
US11946747B2 (en) | 2020-10-09 | 2024-04-02 | Deere & Company | Crop constituent map generation and control system |
US11711995B2 (en) | 2020-10-09 | 2023-08-01 | Deere & Company | Machine control using a predictive map |
US11983009B2 (en) | 2020-10-09 | 2024-05-14 | Deere & Company | Map generation and control system |
US12013245B2 (en) | 2020-10-09 | 2024-06-18 | Deere & Company | Predictive map generation and control system |
US11825768B2 (en) | 2020-10-09 | 2023-11-28 | Deere & Company | Machine control using a predictive map |
US12013698B2 (en) | 2020-10-09 | 2024-06-18 | Deere & Company | Machine control using a predictive map |
US11650587B2 (en) | 2020-10-09 | 2023-05-16 | Deere & Company | Predictive power map generation and control system |
US12048271B2 (en) | 2020-10-09 | 2024-07-30 | Deere &Company | Crop moisture map generation and control system |
US20220110251A1 (en) | 2020-10-09 | 2022-04-14 | Deere & Company | Crop moisture map generation and control system |
US11635765B2 (en) | 2020-10-09 | 2023-04-25 | Deere & Company | Crop state map generation and control system |
US12069986B2 (en) | 2020-10-09 | 2024-08-27 | Deere & Company | Map generation and control system |
US12080062B2 (en) | 2020-10-09 | 2024-09-03 | Deere & Company | Predictive map generation based on seeding characteristics and control |
US12216472B2 (en) | 2020-10-09 | 2025-02-04 | Deere & Company | Map generation and control system |
US12193350B2 (en) | 2020-10-09 | 2025-01-14 | Deere & Company | Machine control using a predictive map |
US11592822B2 (en) | 2020-10-09 | 2023-02-28 | Deere & Company | Machine control using a predictive map |
US11474523B2 (en) | 2020-10-09 | 2022-10-18 | Deere & Company | Machine control using a predictive speed map |
US12178158B2 (en) | 2020-10-09 | 2024-12-31 | Deere & Company | Predictive map generation and control system for an agricultural work machine |
US12127500B2 (en) | 2021-01-27 | 2024-10-29 | Deere & Company | Machine control using a map with regime zones |
US12229886B2 (en) | 2021-10-01 | 2025-02-18 | Deere & Company | Historical crop state model, predictive crop state map generation and control system |
US12082531B2 (en) | 2022-01-26 | 2024-09-10 | Deere & Company | Systems and methods for predicting material dynamics |
US12058951B2 (en) | 2022-04-08 | 2024-08-13 | Deere & Company | Predictive nutrient map and control |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SU1134669A1 (en) | Apparatus for continuous monitoring of soil compacting degree | |
SU663322A3 (en) | Track packing machine | |
CN217652723U (en) | Traveling speed feedback device and intelligent heading machine | |
CN112461594A (en) | Water conservancy environmental protection monitoring sampling equipment | |
CN218673634U (en) | Slope angle mapping device for mountain area highway construction | |
Whiffin | The pressures generated in soil by compaction equipment | |
SU657103A1 (en) | Paper pulp milling degree monitoring device | |
CN213337605U (en) | Farmland water yield monitor | |
AU603097B2 (en) | Nuclear radiation apparatus and method for dynamically measuring density of test materials during compaction | |
CN112129815A (en) | Intelligent rock slag detection system of double-mode shield spiral conveyor | |
SU1077978A1 (en) | Apparatus for monitoring density of cement-soil mixture in construction of belt foundations | |
RU2011728C1 (en) | Road roller | |
CN204964790U (en) | Improvement structure of hyetometer | |
JP3072572B2 (en) | Automatic permeation test equipment for dam site | |
SU1719899A1 (en) | Water-gauging device | |
SU580460A1 (en) | Apparatus for automatic weighing | |
SU1172990A1 (en) | Apparatus for determining the height of underground drainage line | |
CN216955588U (en) | Slurry density sensor with diaphragm | |
SU401921A1 (en) | METHOD FOR DETERMINING THE SOIL FILTRATION COEFFICIENT | |
CN110082843B (en) | Inclined float type siphon weak reflection fiber grating rain gauge and rain gauge array | |
SU903460A1 (en) | Device to road rollers for measuring road paving sag | |
SU1610008A1 (en) | Device for determining deformation of rock mass | |
SU1137188A1 (en) | Electromagnetic profilograph for pipe strings | |
SU395747A1 (en) | METHOD OF MEASURING THE DENSITY OF IRON ORE PULP | |
SU1224629A2 (en) | Device for determining characteristics of pressure transducers |