A High Precision Time Grating Displacement Sensor Based on Temporal and Spatial Modulation of Light-Field

Fu, Min; Li, Changli; Zhu, Guangya; Shi, Hailin; Chen, Fan

doi:10.3390/s20030921

Cited by 9 publications

(4 citation statements)

References 28 publications

(28 reference statements)

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“…According to the idea of "space-time coordinate conversion," a coordinate system of uniform motion is the key to measure space with time [19]. e traveling wave can be divided into the space traveling waves and the time traveling waves by the time grating sensors.…”

Section: Operation Principle Of Time Grating Sensormentioning

confidence: 99%

Research on the Weak Signal Extraction Method with Adaptive Stochastic Resonance Based on the Time Grid Sensor for PMSM

Wang

Liu

et al. 2022

Mathematical Problems in Engineering

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Because the output signal of the time grid sensor is so weak and is easily affected by the disturbing noise, it is difficult to extract the induction signal containing the position information, when the time grid sensor is used to detect the rotor position of the permanent magnet synchronous motor (PMSM). In this paper, an adaptive monostable stochastic resonance method is proposed to realize the weak signal detection of the time grid sensor. The tunnel magnetoresistance effect sensor (TMR) is adopted to detect the change of the rotor magnetic field of the motor in this method, and the detection model of the time grid sensor about PMSM is constructed. The monostable stochastic resonance theory is applied to extract the induction signal of the time grid sensor. As to the problem of the tuning the parameters of the monostable stochastic resonance system, the genetic algorithm is adopted to optimize the parameters of the monostable stochastic resonance system. The experimental results show that the monostable stochastic resonance method based on the genetic algorithm can effectively detect the weak induction signal of the time grid sensor about PMSM. This method solves the problem of the weak signal extraction of the time grid sensor for PMSM, and the detection accuracy is also improved.

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Section: Operation Principle Of Time Grating Sensormentioning

confidence: 99%

Research on the Weak Signal Extraction Method with Adaptive Stochastic Resonance Based on the Time Grid Sensor for PMSM

Wang

Liu

et al. 2022

Mathematical Problems in Engineering

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“…They proposed a time grating sensor for long-distance, nanoscale precision measurement. They proposed a time grating sensor for longdistance, nanoscale precision measurement [13]. This sensor uses high-frequency clock pulses as the measurement standard, and calculates the change in capacitance value through a proportional relationship between the relative displacement and the capacitance change between fixed and moving rulers, and calculates the displacement change [14].…”

Section: Introductionmentioning

confidence: 99%

A dynamic and nonlinear time grating subdivision method for magnetic levitation ruler

Sun,

Tian,

Chen

et al. 2024

Fourth International Conference on Telecommunications, Optics, and Computer Science (TOCS 2023)

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The displacement measurement system consists of an edge finder, a displacement drive system, and a grating. The system structure is complex. Magnetic levitation ruler can achieve both driving and detection functions simultaneously. The subdivision of the output signal of the magnetic levitation ruler can improve the detection accuracy of the magnetic levitation ruler. According to the characteristics of the magnetic levitation ruler, under the condition of constant magnetic induction intensity and horizontal control coil current, the displacement of the mover core is proportional to the square of the movement time. This article proposes a dynamic and nonlinear grid subdivision method based on the time-space conversion method. This article uses TDC-GP22 to set the length of the time grid, which can achieve 1000 times subdivision of the output signal of the magnetic levitation ruler. The subdivision of the output signal of the magnetic levitation ruler improves the measurement accuracy of the magnetic levitation ruler.

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“…The difference with the above sensors is that reduce the processing requirement of grating lines. At the moment, the time-grating inductive sensor, the time-grating capacitive sensor, and the time-grating moving light field sensor [20][21][22][23][24][25][26] have been suitable for industrial production and applications (e.g. rotary table for small and medium-sized machine tool, the high-speed servo motor).…”

Section: Introductionmentioning

confidence: 99%

A novel inductive angular displacement sensor based on time-grating

Sun¹,

Lv²,

Han³

et al. 2022

Meas. Sci. Technol.

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The paper proposes a novel inductive angular displacement sensor based on time-grating to measure large-diameter hollow rotating mechanical components in large science facilities. The sensor design includes a stator, a rotor with two layers of windings. The stator is fabricated according to the dimension of the rotor, which is the large-diameter hollow rotary mechanical components. Based on the electromagnetic induction, the theoretical model of angular displacement measurement is derived by mathematical equations in detail. The sensor design ensures integration of the large-diameter hollow rotating mechanical components with the stator, and solves the problem that the sensors cannot be coaxially installed in the closed-loop control process of large mechanical rotating parts. The performance of the sensor is evaluated by tests of the prototype sensor fabricated by printed circuit board technology, which manifests the effectiveness of the proposed sensor. The results demonstrate the peak-to-peak value of original dynamic error is 124 ″ over 0 ° - 360 ° range, and the measurement error mainly includes first-order and second-order harmonic components. Therefore, the original errors are reduced by optimizing the angular displacement algorithm of the sensor, optimized results demonstrate the final accuracy of the sensor is ±3.5 ″ over the 0 °- 360 ° measurement range.

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A High Precision Time Grating Displacement Sensor Based on Temporal and Spatial Modulation of Light-Field

Cited by 9 publications

References 28 publications

Research on the Weak Signal Extraction Method with Adaptive Stochastic Resonance Based on the Time Grid Sensor for PMSM

Research on the Weak Signal Extraction Method with Adaptive Stochastic Resonance Based on the Time Grid Sensor for PMSM

A dynamic and nonlinear time grating subdivision method for magnetic levitation ruler

A novel inductive angular displacement sensor based on time-grating

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