Angular position device with 2D low-noise Hall microsensor

Lozanova, Siya; Roumenin, Chavdar

doi:10.1016/j.sna.2009.12.013

Cited by 22 publications

(12 citation statements)

References 15 publications

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“…It is known from the physical model that the numerical relationships between 1 and 2 are 1 = 2 and 1 = 2 + 1. (16) changes to the following form:…”

Section: Physical Modeling Of the Method As Shown Inmentioning

confidence: 99%

“…Although the multipole ones were studied in [13], the multipoles ones are difficult to be magnetized [14] and to meet the requirements of small-size, high-resolution, and absolute angle detection [15]. For the type of the magnetic encoders with shaft [16,17], only one circle of sine and cosine signals will be generated and, therefore, the absolute angular position can be easily obtained by the inverse trigonometric functions. However, this type of sensor cannot be fixed on the devices with hollow shaft such as the robot arms.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Method for Measurement of Absolute Angular Position and Application in a Novel Electromagnetic Encoder System

Zhang

Dong

et al. 2015

Journal of Sensors

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For the encoders, especially the sine-cosine magnetic ones, a new method to measure absolute angular position is proposed in the paper. In the method, the code disc of the encoder has only two circle tracks and each one was divided intoNand (N-1) equal code cells. The cell angles, changing from 0° to 360° between any two neighboring code cells, are defined to represent any position on the code disc. The position value of the same point can be represented by different cell angle values of different tracks and the absolute angular position of the point can be obtained by the difference value between the cell angle value of the outer track and the inner one. To validate the correctness of the method theoretically, the derivation process of the method was provided. An electromagnetic encoder system was designed and the experimental platform was established to test the method. The experimental results indicate that the electromagnetic encoder can measure the absolute angular position. Besides, it shows that the method is easy to be realized in algorithm and can reduce computational complexity and decrease dimension of the encoder.

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“…It is known from the physical model that the numerical relationships between 1 and 2 are 1 = 2 and 1 = 2 + 1. (16) changes to the following form:…”

Section: Physical Modeling Of the Method As Shown Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Method for Measurement of Absolute Angular Position and Application in a Novel Electromagnetic Encoder System

Zhang

Dong

et al. 2015

Journal of Sensors

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“…In 2015, a two-dimensional (2D) magnetic field sensor based on the operating principle and characteristics of the magnetic sensitive diode (MSD) was proposed [ 10 ], exhibiting sensitivities of S x B = 544 mV/T and S y B = 498 mV/T in the x and y directions, respectively. In 2010, in order to improve the efficiency of the magnetic modulating system, a 2D Hall micro-sensor with lower noise and angular positioning function was proposed [ 11 ]. In 2013, based on peripheral processing electronics, a new type of 2D differential folded CMOS Hall device with higher accuracy was devised by integrating magneto-transistors in a single chip and connecting a p-substrate to the minimum power supply [ 12 ], so as to obviously reduce noise and cross-sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Magnetic Field Sensor Based on Silicon Magnetic Sensitive Transistors with Differential Structure

et al. 2017

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A two-dimensional (2D) magnetic field sensor consisting of four silicon magnetic sensitive transistors (SMSTs) with similar characteristics is presented in this paper. By use of micro-electromechanical systems (MEMS) and integrated packaging technology, this sensor fabricated by using the silicon wafer with a <100> orientation and high resistivity, was packaged on printed circuit boards (PCBs). In order to detect the magnetic fields in the x and y axes directions, two of the four SMSTs with opposite magnetic sensitive directions were located along the x and −x axes directions, symmetrically, and the others were located along the y and −y axes directions. The experimental results show that when the VCE = 10.0 V and IB = 6.0 mA, the magnetic sensitivities of the sensor in the x and y axes directions are 366.0 mV/T and 365.0 mV/T, respectively. It is possible to measure the 2D magnetic field and improve the magnetic sensitivity, significantly.

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“…A Hall effect-based angle sensing scheme proposed to calculate the angular position of a magnet uses a complex digital technique [25]. Lozanova and Roumenin [26] employed a semi-ring shaped magnet and a Hall micro-sensor to render an angle sensor (accuracy of 3°). An approximate analogue-division technique has been used in [27] to resolve angular position upto a range of 120°.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a tunnelling magneto‐resistance‐based angle transducer

Sreekantan¹,

George²,

Kumar³

2014

IET Circuits, Devices & Systems

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An angle transducer that utilises tunnelling magneto-resistance (TMR) type sensor elements is presented and its performance is analysed. The signal conditioning circuit of the proposed angle transducer translates the sine-cosine outputs of a TMR sensor integrated circuit into an output that varies linearly with the sensing angle. An added advantage of the proposed scheme is that the output of the angle sensor is dictated, apart from the angle being sensed, only by a dc reference voltage. Thus good performance characteristics can be obtained from the proposed transducer very easily by using a precision dc voltage as the reference. Possible sources of errors that may affect the performance of the transducer are identified and their effects are quantified. Simulation studies conducted using SPICE demonstrates the ability of the scheme in providing a linear output across the entire 360°range. Experimental results obtained from a prototype unit built and tested, portray a worst-case error of < ±1.05%.

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Angular position device with 2D low-noise Hall microsensor

Cited by 22 publications

References 15 publications

A Method for Measurement of Absolute Angular Position and Application in a Novel Electromagnetic Encoder System

A Method for Measurement of Absolute Angular Position and Application in a Novel Electromagnetic Encoder System

Two-Dimensional Magnetic Field Sensor Based on Silicon Magnetic Sensitive Transistors with Differential Structure

Analysis of a tunnelling magneto‐resistance‐based angle transducer

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