Modeling and Optimal Design for a High Stability 2D Optoelectronic Angle Sensor

Abstract

The structural deformations caused by environmental changes in temperature, vibration, and other factors are harmful to the stability of high precision measurement equipment. The stability and optimal design method of a 2D optoelectronic angle sensor have been investigated in this study. The drift caused by structural deformations of the angle sensor has been studied and a drift error model has been achieved. Key components sensitive to thermal and vibrational effects were identified by error sensitivity analysis and simulation. The mounts of key components were analyzed using finite element analysis software and optimized based on the concept of symmetric structures. Stability experiments for the original and optimized angle sensors have been carried out for contrast. As a result, the stability of the optimized angle sensor has been improved by more than 63%. It is verified that the modeling and optimal design method is effective and low-cost, which can also be applied to improve the stability of other sensors with much more complex principles and structures.

Optical Accelerometers for Detecting Low-Frequency Micro-Vibrations

“…Although the use of a DVD pickup head is convenient; this part is extremely com such that any component change is impossible. Following the optical configuration DVD pickup head, a compact 2D angle sensor based on the laser autocollimator (LAC) p ciple was developed to expand the measurement range [28]. Lei Common 1D accelerometers cannot meet the requirements of the aerospa and other multidimensional measurement fields due to the complexity and sionality of vibration.…”

“…The parameters Although the use of a DVD pickup head is convenient; this part is extremely compact, such that any component change is impossible. Following the optical configuration of a DVD pickup head, a compact 2D angle sensor based on the laser autocollimator (LAC) principle was developed to expand the measurement range [28]. Lei et al designed a 2D optical accelerometer based on this modified 2D angle sensor [29] (Figure 8).…”

Modeling and improvement for the thermal stability of ring-shaped workpieces with shape boundary constraints

“…Nevertheless, temperature variations considerably influence the measurement accuracy of these precise instruments [3]. Research shows the structure deformation caused by using common materials, such as aluminum (Al), steel, and iron, is necessary to fabricate workpieces to improve stability, for example symmetrical design, grooving, and honeycomb structure [13][14][15]. Nonetheless, the thermal deformation model of workpieces must be obtained before manufacture.…”

“…3) Applying FEA software to simulate the thermal deformation of workpieces [15,25,26]. Liu et al used ANSYS software to simulate the thermal deformation of the components in a MDFM and established a three-dimensional thermal deformation model of the circular workpiece.…”

Modeling of nonuniform thermal deformation and high thermal stability design method for precision instruments

“…However, they can only be used to reduce the deformation of the upper surface of the workpiece and are not suitable for the other surfaces of the workpiece. Cheng et al [14] presented a symmetrical design method to optimize a 2D optoelectronic angle sensor, and the sensor's thermal stability was improved by approximately three times. However, the nonuniform thermal deformation of the base is ignored in their study.…”