scholarly journals Research on Pressure Measuring Device with Magnetic Fluid

2022 ◽  
Vol 2160 (1) ◽  
pp. 012079
Author(s):  
Ruican Hao ◽  
Zhixin Feng ◽  
Huagang Liu ◽  
Shang Wang ◽  
Feifei Xing ◽  
...  
Keyword(s):  
Magnetic Fluid ◽  
The Other ◽  
Measuring Range ◽  
Measuring Device ◽  
Measuring Devices ◽  
Measuring Efficiency ◽  
Novel Material ◽  
Large Cylinder ◽  
Working Principle ◽  
Pressure Measuring Device

Abstract Magnetic fluid is a novel material which could be applied in many fields including sensors, sealings, bilmedicines, and so on. Its super magnetism and fluidity could be used in the sensor as an inducting core. Magnetic fluid and its characteristics were introduced to adapt to the application in the pressure measuring devices. A pressure measuring device with magnetic fluid was proposed and the structure was analyzed and designed according to the characteristics of magnetic fluid. The working principle of pressure measuring device with magnetic fluid was analyzed, and the structure of pressure measuring device was designed and reformed to avoid the overflow and recovery of excessive of magnetic fluid. One arm of the U tube was designed to be a large cylinder to storage large quantities of magnetic fluid. The higher the required precision is, the larger the diameter of one arm should be designed with respect to the other arm of the tube. The measuring range of designed device could also be adjusted as needed. The measuring efficiency of the device could be improved by the designing and reforming work.

scholarly journals Calibration procedures for torque measuring devices by using a reference type torque calibration machine at NMIJ

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 179
Author(s):  
M. Kiuchi ◽  
A. Nishino ◽  
K. Ogushi
Keyword(s):  
The Other ◽  
Automatic Calibration ◽  
Calibration System ◽  
Measuring Device ◽  
Measuring Devices ◽  
Other Hand ◽  
National Metrology Institutes ◽  
Reference Type ◽  
Nominal Capacity ◽  
Japanese Industry

NMIJ / AIST has been disseminating the national torque standard to Japanese industry by using deadweight type torque standard machines (DWTSMs). In general, DWTSMs can generate more precise torque than other types of TSMs. On the other hand, the calibration takes much longer time than others. One possible solution is to use a reference type torque calibration machine (RTCM). RTCMs have been developed in some national metrology institutes (NMIs). We have started the development of the first RTCM in the range of 100 mN · m to 10 N · m. In this study, we developed the automatic calibration system of the RTCM and investigated the calibration procedures for a low nominal capacity torque measuring device (TMD). It was found that the calibration could be realised by the RTCM, compared with the reliable DWTSM of rated capacity of 10 N · m at NMIJ.

Evaluation of Capability of Measuring Device on the Basis of Diagnostics

2013 ◽  
Vol 308 ◽  
pp. 69-74 ◽  
Author(s):  
Ľuboslav Straka ◽  
Ivan Čorný ◽  
Radoslav Kreheľ
Keyword(s):  
Repeated Measurements ◽  
Measuring Instrument ◽  
Tolerance Range ◽  
Tolerance Zone ◽  
Measuring Range ◽  
Measuring Device ◽  
Capability Index ◽  
Measuring Devices ◽  
Capability Evaluation ◽  
The Given

In capability evaluation of measuring devices on the basis of diagnostics, it is important to compare variability of measurement with certain proportion of tolerance zone width of observed qualitative parameter. Determined index of capability of particular measuring device indicates its applicability for inspection of selected qualitative parameters in a given tolerance range. The paper is focused on evaluation of capability of digital micrometer DIGIMATIC within its entire measuring range (0 to 25mm) by the means of capability index Cgm and Cgmk. Evaluation of capability of the given measuring device was carried out by repeated measurements of standards with dimensions representing lower, middle and upper range of the measuring instrument at given accuracy (2μm) of measuring device.

Low Cost Foot Pressure Measuring Device

2021 ◽  
Author(s):  
Titus E. Crisan ◽  
Madalin I. Ardelean ◽  
Bogdan Tebrean ◽  
Tudor Oltean
Keyword(s):  
Low Cost ◽  
Foot Pressure ◽  
Measuring Device ◽  
Pressure Measuring Device

scholarly journals Range Automatic Adjusted Current Transformer Primary Winning

2021 ◽  
Vol 12 (3) ◽  
pp. 3142-3147
Author(s):  
Amirov Sultan Fayzullayevich Et.al
Keyword(s):  
Correction Factor ◽  
Driving Forces ◽  
Operating Mode ◽  
Current Transformer ◽  
Measuring Range ◽  
Secondary Current ◽  
Measuring Devices ◽  
The Difference ◽  
Protection And Control ◽  
And Control

The article discusses the issue of introducing a correction factor for protection and control devices, as the value of the secondary current in a certain range of the auto-adjustable current transformer does not correspond to the value of the secondary current in another range determined by the difference of magnetic driving forces generated by the components of the primary current. Alternatively, an algorithm has been developed to account for the measurement error in this condition in an automatic system that controls the operating mode of the current transformer. It was also found that the output data should be transmitted taking into account the correction factor in order to ensure the proper operation of the protection and measuring devices when the current transformer is switched to another measuring range in the measuring range.

TiO2-HDPE Composite: Bone Bonding Ability and Biocompatibility

2006 ◽  
Vol 309-311 ◽  
pp. 415-418 ◽  
Author(s):  
Tomonori Nasu ◽  
Shunsuke Fujibayashi ◽  
Masashi Neo ◽  
Takashi Nakamura
Keyword(s):  
High Density Polyethylene ◽  
Bone Substitute ◽  
Failure Load ◽  
The Other ◽  
Ability Test ◽  
Polyethylene Composite ◽  
Tio2 Particles ◽  
Novel Material ◽  
Lower Ability ◽  
Biocompatibility Test

A novel material, namely, TiO2-HDPE (TiO2/high density polyethylene) composite was developed by our research group. Its mechanical properties are similar to those of the human cortical bone; hence, we examined the possibility of using it as a bone substitute. We prepared two groups of TiO2-HDPE; one was subjected to ultraviolet irradiation for 0.1 h and the other for 9 h. In bone bonding ability test, the former indicated a lower ability than the latter, which showed approximately 7 to 8 N of failure load. The bone bonding ability of the latter group alone is not sufficient for clinical application; on the other hand, the biocompatibility test was carried out. In the biocompatibility test, the group that was irradiated for 9 h revealed neither a major inflammatory response nor formation of neoplasm. We have to further examine alternate types of polyethylene or TiO2 particles in order to improve the bone bonding ability.

Variable Lower Limb Alignment of Clinical Measures With Digital Photographs and the Footscan Pressure System

2020 ◽  
pp. 1-8
Author(s):  
Figen Govsa ◽  
Gkionoul Nteli Chatzioglou ◽  
Simin Hepguler ◽  
Yelda Pinar ◽  
Ozden Bedre
Keyword(s):  
Lower Limb ◽  
Plantar Pressure ◽  
Subtalar Joint ◽  
Positive Contribution ◽  
Digital Photogrammetry ◽  
Limb Alignment ◽  
Lower Limb Alignment ◽  
Measuring Device ◽  
Joint Flexibility ◽  
Pressure Measuring Device

Objective: This study examines the effect of the lower limb misalignment and its possible compensatory effect on plantar pressure in a normal population. The aim of this paper is to present a structured method for the analysis of posture and its changes using a standardized digital photography technique and plantar pressure measuring device. Design: Cohort. Setting: Laboratory. Participants: A total of 200 adult volunteers between 18 and 22 years of age who had no current symptoms of pain and foot or ankle pathology participated in the study. Main Outcome Measures: The gold standard measure of lower limb alignment with weight-bearing status is the mechanical axis and their angles using Image J software. Structural and functional measurements of the same foot were taken using a plantar pressure measuring device. In this study, 5 alignment (thigh, knee, leg, ankle, and foot) characteristics were measured on the lower limb using the 2 techniques, and, additionally, the foot contact area, peak pressure, foot axis, rearfoot angle, and subtalar joint flexibility score were analyzed in 10 different regions of the foot. Results: This study has shown a reasonable correlation between digitalized measurements and plantar pressures values. Quadriceps angle affected midfoot impulse, foot axis angle, subtalar joint minimum angle, and rearfoot angle positively. Subtalar joint flexibility scores were analyzed in 10 different regions of the foot. There was a positive correlation between rearfoot angle and quadriceps angle (P = .009, r = .261). Results of both methods show that they endorse each other. Conclusions: The posture of the standing feet may have influence on lower limb alignment. Currently, there are no studies carried out by using digital photogrammetry and foot scan. The authors claim that patient-friendly digital photogrammetry would have a positive contribution to the monitoring of patients, even including new ones in the treatment programs, reducing any possible loss in the personal and national economy.

scholarly journals Raspberry Pi-Based Low-Cost Connected Device for Assessing Road Surface Friction

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 341 ◽  
Author(s):  
Miha Ambrož ◽  
Uroš Hudomalj ◽  
Alexander Marinšek ◽  
Roman Kamnik
Keyword(s):  
Traffic Safety ◽  
Road Network ◽  
Low Cost ◽  
Measurement Data ◽  
Automatic Measurement ◽  
Raspberry Pi ◽  
Measuring Device ◽  
The Road ◽  
Measuring Devices ◽  
On The Road

Measuring friction between the tyres of a vehicle and the road, often and on as many locations on the road network as possible, can be a valuable tool for ensuring traffic safety. Rather than by using specialised equipment for sequential measurements, this can be achieved by using several low-cost measuring devices on vehicles that travel on the road network as part of their daily assignments. The presented work proves the hypothesis that a low cost measuring device can be built and can provide measurement results comparable to those obtained from expensive specialised measuring devices. As a proof of concept, two copies of a prototype device, based on the Raspberry Pi single-board computer, have been developed, built and tested. They use accelerometers to measure vehicle braking deceleration and include a global positioning receiver for obtaining the geolocation of each test. They run custom-developed data acquisition software on the Linux operating system and provide automatic measurement data transfer to a server. The operation is controlled by an intuitive user interface consisting of two illuminated physical pushbuttons. The results show that for braking tests and friction coefficient measurements the developed prototypes compare favourably to a widely used professional vehicle performance computer.

A Strips Dispersion Measuring Device Developed

2012 ◽  
Vol 538-541 ◽  
pp. 3145-3148
Author(s):  
Fen Liu
Keyword(s):  
Data Processing ◽  
Image Acquisition ◽  
Measuring Device ◽  
Application Field ◽  
Working Principle ◽  
Effective Integration ◽  
Reliable Basis

It describes the working principle of a strips dispersion measuring device in this article, on the basis of the application field, with the effective integration of image acquisition and data processing systems, timely and accurately measuring strips area, in order to provide a reliable basis for tobacco grading and packaging.

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