Impedance linearity of contactless magnetic type position sensor

Yang, Seung-Ho; Hirata, Katsuhiro; Ota, Terukazu; Kawase, Yoshihiro

doi:10.1109/cefc.2016.7816044

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…This type of sensor was developed by Sumali et al [11], but only for cylinder made of non-conducting composite. Later simulations have shown that the linearity error of such sensor can be decreased by proper design of the coil [12]. We have experimentally verified the performance of a transducer of this kind even for the conducting cylinder within the industrial temperature range [13,14].…”

Section: Introductionmentioning

confidence: 73%

Transformer position sensor for a pneumatic cylinder

Ripka

Mirzaei

Chirtsov

et al. 2019

Sensors and Actuators A: Physical

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A novel transformer-based sensor for a pneumatic cylinder enables measurements of the piston position to be made through a thick conductive cylinder. Unlike existing industrial solutions, which are mainly based on a moving magnet, our se nsors do not require modifications to the parts inside the cylinder. Finite element analysis results are compared with me asurements at various piston positions and excitation fre quencies. Using a suitable model for the magnetic properties of the iron piston bar, we achieved good agreement between the model and reality. When the sensor is operated at 100 Hz, the sensitivity is 200 mV/FS and the raw linearity error is 1.6% of the full 400 mm stroke.

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Section: Introductionmentioning

confidence: 73%

Transformer position sensor for a pneumatic cylinder

Ripka

Mirzaei

Chirtsov

et al. 2019

Sensors and Actuators A: Physical

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“…Measuring pick up voltage for position sensor is well known method for LVDT sensors with different cylindrical and flat type shapes configurations [15]- [18]. Alternative configuration to variable inductance sensor in [1], [10] and [12]- [14] is to implement coils around iron rod instead of cylinder however it is a cumbersome work because of long used coil for pneumatic and hydraulic cylinders [19]. Moving coils have problems with reliability is harsh environment.…”

Section: Mehran Mirzaei Pavel Ripka and Vaclav Grimmentioning

confidence: 99%

A Novel Position Sensor With a Conical Iron Core

Mirzaei

Ripka

Grim

2020

IEEE Trans. Instrum. Meas.

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A novel position sensor is presented in this paper for pneumatic and hydraulic cylinders applications. Solid iron core with conical shape surrounded by axisymmetric coils is an essential part of the proposed position sensor. Axisymmetric coils are used for e xcitation and voltage measurements. Annealing of conical solid iron core is also performed to homogenize magnetic properties and increase conical solid iron core permeability, which improve s position sensor performance in terms of sensitivity and linearity. Analytical and finite element analyses are utilized along with measurements in order to analyze the performance of position sensor. The me asurements of position sensors are performed for excitation coil inductance and pick up coils voltages. Different frequencies are considered for the analysis and measurements. The measurement results show the maximum linearity error is about 4% for the manufactured model and it is calculated maximum 1% for theoretical model.

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“…Position sensor based on variable inductance or impedan ce were presented in [17]- [19], which has bulky winding and heavy weight for long length measurements. Position sensors using magnetically coupled coils and short-circuited mo v ing coil and air coil structure were designed and measured in [20]- [21].…”

Section: Introductionmentioning

confidence: 99%

A Position Sensor With Novel Configuration of Linear Variable Differential Transformer

2021

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Th is paper presents a position sensor ba s ed o n a novel configuration of linear variable differential transform er. Design and optimization of the position sensor a re pre sent ed using finite element method. The sensor has short air core coi ls and long magnetic armatures. The arrangement direction of the re ctangular excitation coil and two antiserially connected re ctangular pick up coils is perpendicular to the motion direction of the position sensor. The coils are located be t ween two parallel silicon steel laminations a s t he a rm a t ures. Th e position sensor is optimized wi th compromise between minimization of nonlinearity error and maximum s e nsit ivi t y. The main advantage of the proposed position sensor is the small ratio of coils dimensions to the working range. The position sensor is operated for the measurements and calculations at excit at io n fre quencies, 500 Hz and 1000 Hz and 2000 Hz. The maximum nonlinearity error is less than 1.5% for theoretical analysis a nd i t i s le ss than 2% for the measurement results in ±90 mm position range.

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Impedance linearity of contactless magnetic type position sensor

Cited by 3 publications

References 1 publication

Transformer position sensor for a pneumatic cylinder

Transformer position sensor for a pneumatic cylinder

A Novel Position Sensor With a Conical Iron Core

A Position Sensor With Novel Configuration of Linear Variable Differential Transformer

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