scholarly journals PENINGKATAN RESOLUSI SENSOR LOAD CELL PADA TIMBANGAN ELEKTRONIK

JURNAL ELTEK ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 37
Author(s):  
Eka Mandayatma
Keyword(s):  
Data Processing ◽  
Dynamic Range ◽  
Measurement Range ◽  
Load Cell ◽  
Load Range ◽  
Business World ◽  
Amplifier Circuit ◽  
Cell Measurement ◽  
Direct Use ◽  
Electronic Signal

Electronic scales are heavy gauges that are widely used both in the laboratory and in the business world. One of the main sensors of electronic scales is the load cell. The direct use of load cell will result in the achievement of the standard resolution of the load cell or ADC system used, so the resolution of the scales will be quite low as it is determined only by the load cell measurement range and the ADC resolution where the dynamic range of the ADC is not reached.In this article will be made electronic efforts to increase the resolution of the scales so that the accuracy of weighing can be better. Improved resolution attempts are made with electronic signal processor and conditioners, among others, by amplifying, summing and leveling amplifiers and to prevent noise being attempted by filtering. Data processing is done by comparing the resolution value of Load cell without signal conditioner and load cell resolution with signal conditioner. Load Cell with a load range of 0 - 5 kg in conditioning with 200x gain obtained output 113 mV to 1200 mV. With a standard ADC at a resolution of 20 mV / bit will be obtained 0000 0110 to 0011 1110 By adding a Leveling Amplifier circuit obtained output 48 mV for load 0 kg and 4.87 Volt for 5 kg load, ADC output in the range 0000 0010 to 1111 1100. Usage ADC without leveling 21% and with 98% leveling. Without leveling weighing resolution is 89 grm / bit and with 20 grm / bit leveling. Increased weighing resolution of 345%.

scholarly journals In-Process Diameter Measurement Technique for Micro-Optical Fiber with Standing Wave Illumination

2021 ◽  
Author(s):  
Masaki Michihata ◽  
Zhao Zheng ◽  
Daiki Funaiwa ◽  
Sojiro Murakami ◽  
Shotaro Kadoya ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Standing Wave ◽  
Dynamic Range ◽  
Scattered Light ◽  
High Dynamic Range ◽  
Measurement Range ◽  
Diameter Distribution ◽  
Process Measurement ◽  
Air Turbulence ◽  
Tapered Optical Fiber

AbstractIn this paper, we propose an in-process measurement method of the diameter of micro-optical fiber such as a tapered optical fiber. The proposed technique is based on analyzing optically scattered light generated by standing wave illumination. The proposed method is significant in that it requires an only limited measurement range and does not require a high dynamic range sensor. These properties are suitable for in-process measurement. This experiment verified that the proposed method could measure a fiber diameter as stable as ± 0.01 μm under an air turbulence environment. As a result of comparing the measured diameter distribution with those by scanning electron microscopy, it was confirmed that the proposed method has a measurement accuracy better than several hundred nanometers.

scholarly journals Expanding Assay Dynamics: A Combined Competitive and Direct Assay System for the Quantification of Proteins in Multiplexed Immunoassays

2008 ◽  
Vol 54 (6) ◽  
pp. 956-963 ◽  
Author(s):  
Michael Hartmann ◽  
Monika Schrenk ◽  
Anette Döttinger ◽  
Sarah Nagel ◽  
Johan Roeraade ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Protein Microarray ◽  
Measurement Range ◽  
Multiplex Assay ◽  
Competitive System ◽  
Direct Immunoassay ◽  
Sandwich Configuration ◽  
Readout Channel ◽  
Autoantibody Detection ◽  
Detection And Quantification

Abstract Background: The concurrent detection and quantification of analytes that vary widely in concentration present a principal problem in multiplexed assay systems. Combining competitive and sandwich immunoassays permits coverage of a wide concentration range, and both highly abundant molecules and analytes present in low concentration can be quantified within the same assay. Methods: The use of different fluorescence readout channels allows the parallel use of a competitive system and a sandwich configuration. The 2 generated assay signals are combined and used to calculate the amount of analyte. The measurement range can be adjusted by varying the competitor concentration, and an extension of the assay system’s dynamic range is possible. Results: We implemented the method in a planar protein microarray–based autoimmune assay to detect autoantibodies against 13 autoantigens and to measure the concentration of a highly abundant protein, total human IgG, in one assay. Our results for autoantibody detection and IgG quantification agreed with results obtained with commercially available assays. The use of 2 readout channels in the protein microarray–based system reduced spot-to-spot variation and intraassay variation. Conclusions: By combining a direct immunoassay with a competitive system, analytes present in widely varying concentrations can be quantified within a single multiplex assay. Introducing a second readout channel for analyte quantification is an effective tool for spot-to-spot normalization and helps to lower intraassay variation.

scholarly journals The new NCPSS BL19U2 beamline at the SSRF for small-angle X-ray scattering from biological macromolecules in solution

2016 ◽  
Vol 49 (5) ◽  
pp. 1428-1432 ◽  
Author(s):  
Na Li ◽  
Xiuhong Li ◽  
Yuzhu Wang ◽  
Guangfeng Liu ◽  
Ping Zhou ◽  
...  
Keyword(s):  
Data Processing ◽  
Small Angle ◽  
Dynamic Range ◽  
Silicon Crystal ◽  
High Dynamic Range ◽  
Biological Macromolecules ◽  
Shanghai Synchrotron Radiation Facility ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The beamline BL19U2 is located in the Shanghai Synchrotron Radiation Facility (SSRF) and is its first beamline dedicated to biological material small-angle X-ray scattering (BioSAXS). The electrons come from an undulator which can provide high brilliance for the BL19U2 end stations. A double flat silicon crystal (111) monochromator is used in BL19U2, with a tunable monochromatic photon energy ranging from 7 to 15 keV. To meet the rapidly growing demands of crystallographers, biochemists and structural biologists, the BioSAXS beamline allows manual and automatic sample loading/unloading. A Pilatus 1M detector (Dectris) is employed for data collection, characterized by a high dynamic range and a short readout time. The highly automated data processing pipeline SASFLOW was integrated into BL19U2, with help from the BioSAXS group of the European Molecular Biology Laboratory (EMBL, Hamburg), which provides a user-friendly interface for data processing. The BL19U2 beamline was officially opened to users in March 2015. To date, feedback from users has been positive and the number of experimental proposals at BL19U2 is increasing. A description of the new BioSAXS beamline and the setup characteristics is given, together with examples of data obtained.

Optical Distance Meter Using a Pulsed Laser Diode and Fast Avalanche Photo Diodes for Measurements of Molten Steel Levels

1996 ◽  
Vol 118 (4) ◽  
pp. 800-803 ◽  
Author(s):  
Tsutomu Araki ◽  
Haruhiko Yoshida
Keyword(s):  
Light Source ◽  
Laser Diode ◽  
Molten Steel ◽  
Dynamic Range ◽  
Pulsed Laser ◽  
Casting Process ◽  
Measurement Range ◽  
Steel Mold ◽  
Optical Distance ◽  
Fast Rise

An optical distance meter with a wide dynamic range, is proposed for measuring the level of molten steel in a steel mold. The meter operates by measuring the flight time of a short optical pulse that is propagated between the light source and the target. A pulsed laser diode with a fast rise time is utilized as a light source, and two avalanche photo-diodes are used as detectors. The optical distance meter performs at a measurement range and a standard deviation of the measurement error of 1 m and 1 mm for the black paper target, respectively. To test its reliability, the distance meter is used to monitor the level of molten steel during a continuous casting process. The results obtained were compared with those obtained using an eddy current sensor and a γ-ray sensor. The measurement range of the optical method is ten times those attained using other two sensors. Continuous monitoring of the steel level can be done from the initiation of the casting process with the proposed distance meter.

scholarly journals In-Situ Wireless Pressure Measurement Using Zero-Power Packaged Microwave Sensors

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1263 ◽  
Author(s):  
Julien Philippe ◽  
Maria De Paolis ◽  
Dominique Henry ◽  
Alexandre Rumeau ◽  
Antony Coustou ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Pressure Sensors ◽  
Measurement Range ◽  
Full Scale ◽  
Remote Measurement ◽  
Reverberant Environments ◽  
Indoor Wireless ◽  
Measurement Results ◽  
Radar Imagery ◽  
First Time

This paper reports the indoor wireless measurement of pressure from zero-power (or passive) microwave (24 GHz) sensors. The sensors are packaged and allow the remote measurement of overpressure up to 2.1 bars. Their design, fabrication process and packaging are detailed. From the measurement of sensor scattering parameters, the outstanding sensitivity of 995 MHz/bar between 0.8 and 2.1 bars was achieved with the full-scale measurement range of 1.33 GHz. Moreover, the 3D radar imagery technique was applied for the remote interrogation of these sensors in electromagnetic reverberant environments. The full-scale dynamic range of 4.9 dB and the sensitivity of 4.9 dB/bar between 0.7 and 1.7 bars were achieved with radar detection in a highly reflective environment. These measurement results demonstrate for the first time the ability of the radar imagery technique to interrogate fully passive pressure sensors in electromagnetic reverberant environments.

scholarly journals Large Dynamic Current Monitoring for UAV Steering Motor Using Twin Nonlinear Shunt

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1240
Author(s):  
Bo Li ◽  
Shengbing Zhang ◽  
Hanlu Zhang ◽  
Shiyu Wang ◽  
Feng He
Keyword(s):  
Monitoring System ◽  
Health Monitoring ◽  
Dynamic Range ◽  
Measurement Range ◽  
Industrial Control ◽  
Sampling Device ◽  
Health Monitoring System ◽  
Working Principle ◽  
Current Sampling ◽  
Current Monitoring

Steering motor is of vital importance in UAV’s health-monitoring system, to which its supply current is the most critical characteristic representing health statue of UAV. In order to conduct continuous measuring on the steering motor’s current of large dynamic range, in this paper, a current measurement method is therefore proposed on the basis of twin nonlinear shunt. The proposed method adopts the twin diode as the current sampling device, which not only realizes measurement range and relative constant resolution, but also ensures continuity of the measurement due to the eliminated operation of range switching. The associated diode is used to compensate the temperature of core temperature of the shunt diode, and to make the nonlinear-shunt more adaptive for the case of junction being heated under larger current. The working principle, real-time compensation method and circuit implementation of our method are discussed in detail. Experimental test results suggest that the measurement error of the proposed method is less than 4.5% when the measurement current varies between 10 mA to 10 A, maintaining the relative resolution at an almost constant level, while preventing the conventional method of frequent range switching from generating glitches. In addition to the ensured continuity, information-rich details of the current are sustained, contributing to the UAV’s health-monitoring system. The proposal can also be applied to other applications concerning large dynamic current detection, including, but not limited to, industrial control, motor control, etc.

HIGH SENSITIVITY AND HIGH DYNAMIC RANGE OPTICAL MICRO-RADIATOR VACUUM SENSOR FABRICTED WITH CMOS TECHNOLOGY

2008 ◽  
Vol 05 (03) ◽  
pp. 189-196
Author(s):  
Y. MA ◽  
R. P. W. LAWSON ◽  
A. M. ROBINSON
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
High Dynamic Range ◽  
Cmos Technology ◽  
Measurement Range ◽  
Power Switching ◽  
Pressure Sensing ◽  
Vacuum Sensor ◽  
Sensitivity Improvement ◽  
Silicon Cmos

A Complementary Metal Oxide Silicon (CMOS) optical micro-radiator vacuum sensor has been designed, tested and calibrated. The package is comprised of a micromachined radiator and a photodetector. The sensitivity improvement of the system over the conventional Pirani gauge is up to nine magnitudes depending on the operating power of the micro-radiator. To increase sensor's dynamic range, an automated power-switching system has been demonstrated for pressure sensing operated with constant photodetector output. Calibration of the system has been performed by comparison with secondary standards. Experimental results showed that the sensor's measurement range from 10-3 Pa to 105 Pa has been achieved as its relative error is less than 8%.

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