scholarly journals Analysis of the Downhole Measurement System’s Pressure and Temperature Measuring Channel Calibration Errors

2021 ◽  
Vol 2096 (1) ◽  
pp. 012066
Author(s):  
N A Ishinbaev ◽  
A N Krasnov ◽  
M Yu Prakhova ◽  
Yu V Novikova
Keyword(s):  
Pressure Transducer ◽  
Bridge Circuit ◽  
Error Component ◽  
Measuring Channel ◽  
Measurement Systems ◽  
Temperature Measuring ◽  
Gauge Pressure ◽  
Uncertainty Band ◽  
Single Sensor ◽  
Temperature And Pressure

Abstract Various measurements in wells are quite challenging due to the specific measurement conditions. There are some additional requirements for measurement systems, in particular, space restrictions. Therefore, measuring several parameters with a single sensor is rather important. The paper discusses a measurement system that allows measuring temperature and pressure with a single sensor – an SOS-based strain gauge pressure transducer with a bridge or half-bridge circuit. In this case, pressure and temperature measuring channels are calibrated individually, which creates another error component. The numerical simulation of calibration described herein shows that regardless of the sensor circuit, the voltage uncertainty band of both measuring channels is characterized by a reduced error of 0.03 % with a confidence probability P = 0.9.

Method of metrological self-checking of a strain gauge pressure sensor

Metrologiya ◽  
2020 ◽  
pp. 48-62
Author(s):  
Vladimir A. Larionov
Keyword(s):  
Strain Gauge ◽  
Supply Voltage ◽  
Experimental Studies ◽  
Pressure Sensors ◽  
Experimental Sample ◽  
Self Monitoring ◽  
Gauge Pressure ◽  
External Conditions ◽  
Temperature And Pressure ◽  
Overall Resistance

Existing methods of metrological self-monitoring of measuring sensors for temperature and pressure of technological industries are considered. The analysis of methods of metrological self-checking of strain gauge pressure sensors is carried out. Method is proposed based on measuring the supply voltage and voltage on the measuring diagonal of the bridge. The temperature of the strain gauge bridge is determined using a semiconductor thermistor installed near the bridge. This allows you to adjust the measured value of the total resistance of the bridge from the temperature of the bridge. With aging and exposure to external conditions, a change in the overall resistance of the bridge can be used to judge the error of the sensor. An experimental sample of the sensor was made. The failure of the strain gage bridge is simulated by parallel connection of an additional resistor to one of the shoulders of the bridge. Experimental studies have shown that modern technical means make it possible to assess the effect of changes in the total bridge resistance on the sensor error.

Reduction of plantar pressure with the rigid relief orthosis

1993 ◽  
Vol 83 (3) ◽  
pp. 115-122 ◽  
Author(s):  
A Novick ◽  
J Stone ◽  
JA Birke ◽  
DM Brasseaux ◽  
JB Broussard ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Plantar Pressure ◽  
Pressure Transducer ◽  
Clinical Effectiveness ◽  
Metatarsal Head ◽  
Lesion Site ◽  
Measurement Systems ◽  
Plantar Surface ◽  
First Metatarsal

The rigid relief orthosis was developed to protect vulnerable sites on the plantar surface of the insensitive foot against reulceration by providing both a nonyielding relief under the healed lesion site and a total contact fit. Clinically, the rigid relief orthosis has been effective in protecting the foot against the trauma induced by the repetitive mechanical stress of walking. This study used both the Hercules and F-Scan pressure transducer systems to measure pressure at the first metatarsal head in three orthotic treatments. Both measurement systems recorded significant reductions in pressure at the first metatarsal head with the rigid relief orthosis, establishing a quantitative rationale explaining its clinical effectiveness. Significant pressure differences were also recorded at the secondary sites of the heel, midfoot, and third metatarsal head.

Strain-gauge pressure transducer with a higher sensitivity

1968 ◽  
Vol 11 (1) ◽  
pp. 122-123
Author(s):  
I. A. Berezhnoi ◽  
V. M. Gumerov ◽  
E. L. Kleiner
Keyword(s):  
Strain Gauge ◽  
Pressure Transducer ◽  
Gauge Pressure ◽  
Higher Sensitivity

scholarly journals A COMPARATIVE STUDY OF CURRENT SOURCES USED IN BIOIMPEDANCE MEASUREMENT SYSTEMS

2012 ◽  
pp. 87-90
Author(s):  
PADMA BATRA ◽  
RAJIV KAPOOR ◽  
RAJIV KAPOOR
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Bridge Circuit ◽  
Current Source ◽  
Bioelectrical Impedance ◽  
Impedance Tomography ◽  
Measurement Systems ◽  
Bioimpedance Measurement

The current source circuit is one of the most important parts in the bioelectrical impedance devices and Bio Impedance Tomography (BIT). There are many types of circuits like the Howland Current Source, Improved Howland Current Source, General Impedance Convertor, Wien Bridge circuit etc. This paper presents the comparative analysis of the available current sources and study of the best suited ones for the bioimpedance measurement and its various applications.

An Experimental Model for the Acute and Chronic Evaluation of Intra-Aneurysmal Pressure

1997 ◽  
Vol 4 (3) ◽  
pp. 290-297 ◽  
Author(s):  
Peter L. Faries ◽  
Luis A. Sanchez ◽  
Michael L. Marin ◽  
Richard E. Parsons ◽  
Ross T. Lyon ◽  
...  
Keyword(s):  
Animal Model ◽  
Strain Gauge ◽  
Pressure Transducer ◽  
Close Correlation ◽  
Aortic Aneurysms ◽  
Pressure Measurements ◽  
Abdominal Aortic ◽  
Endovascular Grafts ◽  
Gauge Pressure ◽  
Aneurysm Repair

Purpose: To develop an animal model for the acute and chronic monitoring of pressure within abdominal aortic aneurysms (AAAs) to be treated with endovascular grafts. Methods: A strain-gauge pressure transducer was placed within an AAA created from a prosthetic vascular graft. Prosthetic aneurysms were implanted into 17 canine infrarenal aortas. The intra-aneurysmal pressure was monitored and correlated with noninvasive forelimb sphygmomanometry for 2 weeks. After this time, an intravascular manometer catheter was passed into the aneurysm. Simultaneous pressure measurements were obtained using the implanted strain-gauge pressure transducer, the manometer catheter, and the forelimb sphygmomanometer. Angiography was performed to assess intraluminal morphology, aneurysm anastomoses, and adjoining aortic vessels. In addition, two control animals underwent intra-aneurysmal pressure monitoring after standard surgical aneurysm repair. Results: There was excellent correlation (r = 0.97) between the pressure measurements obtained with the implanted strain-gauge pressure transducer and the intravascular manometer. Close correlation was also observed between the implanted strain-gauge transducer and the forelimb sphygmomanometer (r = 0.88) during postprocedural monitoring. Intra-aneurysmal pressure was lowered dramatically by surgical exclusion (aneurysm: 15/5 ± 7/4 mmHg; systemic: 124/66 ± 34/17 mmHg; p < 0.001). The prosthetic aneurysms were successfully imaged with angiography. Conclusions: This animal model provides an accurate and reproducible means for measuring intra-aneurysmal pressure on an acute and chronic basis. It may be possible to use this model in the assessment of endovascular devices to determine their efficacy in reducing intra-aneurysmal pressure. Evaluation of complications associated with their use, such as patent aneurysm side branches, perigraft channels, and perianastomotic reflux, may also be possible.

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