Development of an automated and dedicated measuring system for straightness evaluation

Paziani, Fabricio Tadeu; Giacomo, Benedito Di; Tsunaki, Roberto Hideaki

doi:10.1590/s1678-58782007000300009

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…The LVDT provides excellent behavior in terms of high resolution, robustness, and durability [ 1 , 2 , 3 ]. Many applications of the LVDT are found in the fields of industrial process control [ 3 , 4 , 5 , 6 ], building construction [ 7 ], automobiles [ 8 , 9 ], military equipment [ 10 , 11 , 12 ], scientific and medical equipment [ 12 , 13 ], and robotics [ 14 , 15 ]. All applications of the LVDT are used to measure position, force, flow, displacement, and pressure.…”

Section: Introductionmentioning

confidence: 99%

Linear-Range Extension for Linear Variable Differential Transformer Using Hyperbolic Sine Function

Rerkratn

Tongcharoen

Petchmaneelumka

et al. 2022

Sensors

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In this paper, a circuit technique to extend the measuring range of a linear variable differential transformer (LVDT) is proposed. The transfer characteristic of the LVDT contains the odd function form of the cubic polynomial. Therefore, the measuring range of a commercial LVDT is linear in a narrow range compared to its physical dimensions. The wide measuring range of the LVDT requires a large structure of the LVDT, which increases the scale and the cost of the measurement system. The measuring range of the LVDT can be linearly extended to the maximum of the stroke range using the proposed technique. The realization of the proposed technique is based on the use of the hyperbolic sine (sinh) function of the electronic circuit building block, named the class AB bipolar amplifier. The class AB bipolar amplifier can be obtained by the current feedback operational amplifier (CFOA). The circuit of the proposed technique requires two CFOAs and an operational transconductance amplifier (OTA) as the active devices and all devices used in the proposed technique to synthesize the sinh function are commercially available. The proposed technique exhibits an ability to compensate for the nonlinear characteristic of the LVDT without digital components. The proposed technique is attractive in terms of its simple circuit configuration, small size, and low cost. The linear range extension of the LVDT used in this paper is significantly increased with a maximum error of about 18.3 μm of 6.2 mm at the full stroke range or the full-scale percentage error of about 0.295%. The results indicate that the proposed technique provides excellent performance to extend the measuring range of the LVDT without modifying the LVDT structure.

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Section: Introductionmentioning

confidence: 99%

Linear-Range Extension for Linear Variable Differential Transformer Using Hyperbolic Sine Function

Rerkratn

Tongcharoen

Petchmaneelumka

et al. 2022

Sensors

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“…But for automobile components like suspension tubes and camshafts most of the industries are inspecting their finished product by Manual-intensive inspection methods for each and every piece before supplied to the customer. Due to unskilled labor and human fatigue there is the very high probability of imprecise inspection on the finished product [1]. Therefore the development of an automated system for inspection is necessary in order to avoid the imprecise inspection by manual methods [2].…”

Section: Introductionmentioning

confidence: 99%

Development of an automated and dedicated measuring system of tube dimensions using 1d and 2d laser displacement sensors

Rajan¹,

Sathickbasha²,

Balaji³

et al. 2019

FME Transactions

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The measurement of tube dimensions such as Inner Diameter (ID), Outer Diameter (OD), length, chamfer angle and OD run-out with the help of conventional measuring instruments requires skilled operators. Human operated inspection system is having a high possibility of uncertainty in the inspection of midsize and large batch production of tubes. Industries require high precision and high-speed with low uncertainty in the measurements for ensuring the better quality delivery of the tube product. This work aims to present the development of an automated and dedicated inspection system that inspects ID, OD, length, chamfer angle, and OD run-out of tubular components (such as camshafts, air-suspension tubes, etc.) using1D and 2D laser displacement sensors. The ID, OD, and chamfer angle (inner chamfer angle on both ends of the tube) of the tubes are measured using 2D laser displacement sensor. The 1D laser displacement sensors were used to measure the run-out and length of the tubes. Calibration of sensors with the master tube was done and compared with the manual inspection method.

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“…Thus, the performance of this method is directly affected by the properties of the scanning stage. Other multi-probe methods, such as two-probe methods [7][8][9][10][11], threeprobe methods, or combined methods [12][13][14][15][16][17][18] have also been developed effectively to separate straightness error from the scanning stage. These methods, using multiple sensors (displacement sensors or angle sensors), can eliminate the influences of both translation motion error and tilt motion error.…”

Section: Introductionmentioning

confidence: 99%

Automatic straightness measurement of a linear guide using a real-time straightness self-compensating scanning stage

Liu

Jeng

Jywe

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this paper a method is developed for straightness measurement of a linear guide by using a straightness self-compensating stage with an optical straightness measuring system, an eddy current sensor, and a cross-roller type compensation stage. Both the compensation stage and the optical straightness system were set up on a scanning stage to measure the straightness error of the scanning stage. The measured straightness error was fed back to the control system to compensate directly in real time. Thus, straightness of a linear guide without the added straightness error of the scanning stage could be measured. The Hewlett Packard laser straightness calibration system was used to verify the real-time compensated results. Straightness error of the scanning stage was compensated from the worst straightness error of 20 μm/150 mm to 0.9 μm/150 mm. The eddy current sensor measured straightness of the linear guide and the measured result matched the result obtained by the coordinate measuring machine.

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Development of an automated and dedicated measuring system for straightness evaluation

Cited by 6 publications

References 13 publications

Linear-Range Extension for Linear Variable Differential Transformer Using Hyperbolic Sine Function

Linear-Range Extension for Linear Variable Differential Transformer Using Hyperbolic Sine Function

Development of an automated and dedicated measuring system of tube dimensions using 1d and 2d laser displacement sensors

Automatic straightness measurement of a linear guide using a real-time straightness self-compensating scanning stage

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