Application of fast steering mirror in image motion compensation

Zheng-xi, 王正玺 Wang; Bao, 张葆 Zhang; Xian-tao, 李贤涛 Li; Shi-tao, 张士涛 Zhang

doi:10.3788/co.20201301.0095

Cited by 4 publications

(1 citation statement)

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“…They play important roles in industrial production, aerospace manufacturing, the nuclear industry, the petrochemical industry, safety testing, etc. In the field of mechanical vibration technology, eddy current sensors are mainly used for radial vibration measurements of rotating shafts and axial displacement measurements; in optoelectronic imaging systems, they are mostly used for angle measurements of fast steering mirrors [ 18 , 19 ]. According to the application method, eddy current sensors are divided into single-ended and differential types.…”

Section: Introductionmentioning

confidence: 99%

Single-Ended Eddy Current Micro-Displacement Sensor with High Precision Based on Temperature Compensation

Xu,

Feng,

Liu

et al. 2024

Micromachines

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To measure the micro-displacement reliably with high precision, a single-ended eddy current sensor based on temperature compensation was studied in detail. At first, the principle of the eddy current sensor was introduced, and the manufacturing method of the probe was given. The overall design plan for the processing circuit was induced by analyzing the characteristics of the probe output signal. The variation in the probe output signal was converted to pulses with different widths, and then it was introduced to the digital phase discriminator along with a reference signal. The output from the digital phase discriminator was processed by a low-pass filter to obtain the DC component. At last, the signal was amplified and compensated to reduce the influence of temperature. The selection criteria of the frequency of the exciting signal and the design of the signal conditioning circuit were described in detail, as well as the design of the temperature-compensating circuit based on the digital potentiometer with an embedded temperature sensor. Finally, an experimental setup was constructed to test the sensor, and the results were given. The results show that nonlinearity exists in the single-ended eddy current sensor with a large range. When the range is 500 μm, the resolution can reach 46 nm, and the repeatability error is ±0.70% FR. Within the temperature range from +2 °C to +58 °C, the voltage fluctuation in the sensor is reduced to 44 mV after temperature compensation compared to the value of 586 mV before compensation. The proposed plan is verified to be feasible, and the measuring range, precision, and target material should be considered in real-world applications.

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Section: Introductionmentioning

confidence: 99%

Single-Ended Eddy Current Micro-Displacement Sensor with High Precision Based on Temperature Compensation

Xu,

Feng,

Liu

et al. 2024

Micromachines

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Development of a low capacitance two-axis piezoelectric tilting mirror used for optical assisted micromanipulation

Zhang

Liu

Deng

et al. 2021

Mechanical Systems and Signal Processing

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Technology of Image Motion Compensation for Different Velocity of Aerial Camera Based on Integration Level and Frequency Division Control

Ren

et al. 2021

Journal of Nanoelectronics and Optoelectronics

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When an aircraft is flying sideways, the aerial camera will be in a squint state, and there will be multiple image motions of different sizes on the imaging target at the same time. In this paper, the principle of different velocity image motion in squint imaging of an aircraft is analysed, and the compensation strategy of different velocity image motion is proposed. Then, three methods are used to analyse the adjustment strategy of different velocity image motion compensation, namely, adjusting the integration level of (Time Delayed and Integration) TDICCD, grouping and frequency division control of TDICCD on the image surface, and optimizing the control based on the combination of integration level and frequency division control. Through the simulation analysis, it is concluded that the adjustment of the integration level of TDICCD and the slice grouping control is the optimal method. This method not only ensures the required image SNR of the optical system but also reduces the complex problems of electronic circuit and control system caused by the presence of too many segments and groups. In the actual aerial camera system imaging, this method can be used as an effective method for the compensation for the image motion of different velocity when the aerial camera tilts. Then, the design of the driving circuit and timing generator are described. The validity of the method is verified by indoor simulations and a flight test.

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Application of fast steering mirror in image motion compensation

Cited by 4 publications

References 0 publications

Single-Ended Eddy Current Micro-Displacement Sensor with High Precision Based on Temperature Compensation

Single-Ended Eddy Current Micro-Displacement Sensor with High Precision Based on Temperature Compensation

Development of a low capacitance two-axis piezoelectric tilting mirror used for optical assisted micromanipulation

Technology of Image Motion Compensation for Different Velocity of Aerial Camera Based on Integration Level and Frequency Division Control

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