New Style Four-Electrode MEMS Conductivity Chip

MEMS sensor for solution conductivity measurement has been applied widely which has many advantages such as cheap, accurate, batch fabricate, and good consistent etc. Existent MEMS conductivity sensors usually have planar structure with four short parallel electrodes so that the two voltage electrodes are tend to be polluted and consequently lead to mistakes for the conductivity test system. A new pattern of conductivity chip with an annular voltage electrode to enhance the ability of anti-pollution based on MEMS technology is going to be introduced in this article; the ANSYS simulation is applied to help demonstrate the reasons why the new pattern of conductivity chip has good ability of anti-pollution and the experiment results are also presented to show the performance of the conductivity sensor.

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New Hybrid Methodology for the Development of MEMS Multivariable Sensors

10.1115/imece2001/epp-24722 ◽

2001 ◽

Author(s):

Emily J. Pryputniewicz ◽

John P. Angelosanto ◽

Gordon C. Brown ◽

Cosme Furlong ◽

Ryszard J. Pryputniewicz

Keyword(s):

Process Control ◽

Microelectromechanical Systems ◽

Absolute Pressure ◽

Single Chip ◽

Specific Test ◽

Mems Sensor ◽

Test Conditions ◽

Mems Technology ◽

Functional Operation ◽

Hybrid Methodology

Abstract Using recent advances in microelectromechanical systems (MEMS) technology, a new multivariable sensor was developed. This MEMS sensor, capable of measuring temperature, absolute pressure, and differential pressure on a single chip, is particularly suitable for applications in process control industry. However, functional operation of the sensor depends on validation of its performance under specific test conditions. We have developed a hybrid methodology, based on analysis and measurements, that allows such validation. In this paper, the MEMS multivariable sensor is described, the hybrid methodology is outlined, and its use is illustrated with representative results.

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Seabird Biologging System with Compact Waterproof Airflow Sensor

Journal of Robotics and Mechatronics ◽

10.20965/jrm.2021.p0466 ◽

2021 ◽

Vol 33 (3) ◽

pp. 466-474

Author(s):

Hidetoshi Takahashi ◽

Masaru Naruoka ◽

Yoshinobu Inada ◽

Katsufumi Sato ◽

◽

...

Keyword(s):

Dorsal Surface ◽

Micro Electro Mechanical System ◽

Pitot Tube ◽

Flight Performance ◽

Airflow Velocity ◽

Mems Sensor ◽

System A ◽

Tube Type ◽

Direct Measurement Method ◽

Airflow Sensor

This paper presents a seabird biologging system with a compact waterproof airflow sensor. Although biologging methods have attracted attention in the evaluation of seabird flight performance, a direct measurement method of airflow velocity has not yet been established. When an airflow sensor is added to a biologging system, a more accurate assessment of the flight performance can be obtained. We developed a compact Pitot tube-type airflow sensor that is specialized for seabird biologging systems. Here, we integrated micro electro mechanical system (MEMS) sensor chips and a sensing circuit into the Pitot tube housing. Then, we conducted a wind tunnel experiment using a stuffed seabird and the fabricated sensor. The results confirmed that the sensor responds to the wind speed even when attached to the dorsal surface of the seabird. Based on the above, we believe that the proposed sensor can be applied to practical seabird biologging systems.

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THE CHLORELLA-TEST-SYSTEM - A COMPLEX OF METHODS FOR STANDARDIZED ANALYSIS OF PARAMETERS OF POTENTIAL PHYTOPHARMACA

Advances in Pesticide Science ◽

10.1016/b978-0-08-023930-9.50204-5 ◽

1979 ◽

pp. IV-408

Author(s):

H. Böhm ◽

H. Arndt ◽

E. Boms ◽

G. Hiekel

Keyword(s):

Test System ◽

System A

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Increased Likelihood of Pregnancy Using an App-Connected Ovulation Test System: A Randomized Controlled Trial

Journal of Women s Health ◽

10.1089/jwh.2019.7850 ◽

2020 ◽

Vol 29 (1) ◽

pp. 84-90 ◽

Cited By ~ 2

Author(s):

Sarah Johnson ◽

Joseph B. Stanford ◽

Graham Warren ◽

Sharon Bond ◽

Sharon Bench-Capon ◽

...

Keyword(s):

Randomized Controlled Trial ◽

Controlled Trial ◽

Test System ◽

Randomized Controlled ◽

System A

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Research and Application of Heavy-Equipment Parachute Rope Tension Sensor

Journal of Sensors ◽

10.1155/2018/7631727 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10

Author(s):

Min Yao ◽

Yanhua Jin ◽

Min Zhao ◽

Shaohua Xu

Keyword(s):

Particle Swarm Optimization Algorithm ◽

Test System ◽

Simulation Software ◽

Support Vector ◽

Test Results ◽

Maximum Weight ◽

Swarm Optimization ◽

Ansys Simulation ◽

Heavy Equipment ◽

Tension Sensor

Heavy-equipment airdrops are mainly used to deliver relief supplies and heavy weapons. Given the heavy weight of the goods, the tension of the extraction and brake ropes of the parachute significantly affects the safety of the aircraft. On the basis of the measurement and installation characteristics of the parachute rope, this study designed the structure of a nondestructive pressure-type parachute rope tension sensor and set the location of the strain gauge patch using the ANSYS simulation software to obtain a high sensor sensitivity. The temperature error of the tension sensor is compensated, and the precision is improved using the LSSVM-PSO (Least Squares Support Vector Machine-Particle Swarm Optimization) algorithm. The developed tension sensor is applied to the extraction parachute test system to measure the traction of 2 and 8 m2 parachutes. Test results show that the maximum weight of the platform these two parachutes can draw and the effect of parachute opening can be calculated.

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Research on a High Effective Algorithm of PRACH Baseband Signal in TD-LTE System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.380-384.4031 ◽

2013 ◽

Vol 380-384 ◽

pp. 4031-4034

Author(s):

Fa Tang Chen ◽

Chi Yun Xu

Keyword(s):

Random Access ◽

Test System ◽

Effective Algorithm ◽

Conformance Test ◽

Idle Mode ◽

Generation Algorithm ◽

System A ◽

Baseband Signal

Random Access Procedure is a bridge between idle mode and connection mode in LTE system, and the algorithm of PRACH baseband signal we use will influence the performance of LTE system. A kind of High effective algorithm of PRACH baseband signal is introduced in this paper based on the research and analysis on the present PRACH baseband generation algorithm .By comparing and simulation, we find the algorithm introduced in this paper is feasible and effective. And this algorithm has been used in the RF conformance test system in LTE system.

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The Compass Time System and its Interoperation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.239-240.548 ◽

2012 ◽

Vol 239-240 ◽

pp. 548-551

Author(s):

Shao Wu Dong

Keyword(s):

Atomic Clock ◽

Test System ◽

Ground Control ◽

Time System ◽

Satellite Navigation System ◽

System A ◽

Timing System ◽

Control Centre ◽

Navigation Test ◽

Atomic Time

We report on the time reference system of Compass global satellite navigation system and its interoperation with other GNSS’s. China has sent three satellites into geostationary orbit since 2000, and Compass Navigation Test System has been established. Compass time reference, named as BDT, is based on Atomic time, BDT is derived from the atomic clock ensemble in Compass ground control centre, and be traced to the international time, UTC. Interoperability is one of the most important aspect in the design of Compass timing system, a solution of time differences determination among BDT and other GNSS time scales are introduced in this paper.

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MEMS Technology Sensors as a More Advantageous Technique for Measuring Foot Plantar Pressure and Balance in Humans

Journal of Sensors ◽

10.1155/2016/6590252 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 3

Author(s):

Clara Sanz Morère ◽

Łukasz Surażyński ◽

Ana Rodrigo Pérez-Tabernero ◽

Erkki Vihriälä ◽

Teemu Myllylä

Keyword(s):

Plantar Pressure ◽

Microelectromechanical Systems ◽

Human Life ◽

Pressure Sensors ◽

High Mobility ◽

Pressure Measurements ◽

Mems Sensor ◽

Research Problems ◽

Mems Technology ◽

Footwear Design

Locomotor activities are part and parcel of daily human life. During walking or running, feet are subjected to high plantar pressure, leading sometimes to limb problems, pain, or foot ulceration. A current objective in foot plantar pressure measurements is developing sensors that are small in size, lightweight, and energy efficient, while enabling high mobility, particularly for wearable applications. Moreover, improvements in spatial resolution, accuracy, and sensitivity are of interest. Sensors with improved sensing techniques can be applied to a variety of research problems: diagnosing limb problems, footwear design, or injury prevention. This paper reviews commercially available sensors used in foot plantar pressure measurements and proposes the utilization of pressure sensors based on the MEMS (microelectromechanical systems) technique. Pressure sensors based on this technique have the capacity to measure pressure with high accuracy and linearity up to high pressure levels. Moreover, being small in size, they are highly suitable for this type of measurement. We present two MEMS sensor models and study their suitability for the intended purpose by performing several experiments. Preliminary results indicate that the sensors are indeed suitable for measuring foot plantar pressure. Importantly, by measuring pressure continuously, they can also be utilized for body balance measurements.

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Thermal Performance Analysis for a New External Wall Insulation System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.6476 ◽

2011 ◽

Vol 383-390 ◽

pp. 6476-6483

Author(s):

Jian Guang Li ◽

Li Ping Tong ◽

Li Hui Tian

Keyword(s):

Thermal Resistance ◽

Flow Density ◽

Insulation Material ◽

Insulation System ◽

Equivalent Thermal Conductivity ◽

External Wall ◽

Ansys Simulation ◽

System A ◽

Temperature Loads ◽

New System

Based on the existing quality problems of external wall insulation system, a new external wall insulation system was developed through the rational use of closed air layer’s thermal insulation performance. Considering three kinds of ways of heat transfer-- convection, conduction and radiation and using the coefficient of air equivalent thermal conductivity to obtain the thermal resistance in the air layer, compared with the thermal resistance at different thicknesses in the new system using polyurethane and polystyrene board of insulation material with two different thicknesses, the authors can get the most optimal model. This paper takes the extreme value of indoor and outdoor temperature in summer as the temperature loads of this model and uses ANSYS simulation to obtain its heat flow density, gradient and temperature field, and in the meanwhile, undertakes a comparison with the present form of external wall insulation in the new code. Data indicates that in the same index of energy saving, this system can not only meet the needs of the code, but also reduce the requirement of heat insulator, as well as greatly improve anti-cracking and waterproofing ability. Thus, the new system follows the direction of the development in this field.

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