Static force measurement for automation assembly systems

Lin, Chung‐Hsien; Tsai, Mi Ching; Hsiao, Shih Wei

doi:10.1016/j.sna.2012.09.001

Cited by 17 publications

(19 citation statements)

References 16 publications

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“…7 The force measurement based on the piezoelectric principle has been significantly improved in the measurement performance and application range extension. [8][9][10][11] In this paper, the force measurement based on the piezoelectric principle is investigated for the purpose of the sensitivity enhancement because a higher sensitivity is required for the measurement of small or micro forces.…”

Section: -2mentioning

confidence: 99%

Sensitivity enhancement of piezoelectric force sensors by using multiple piezoelectric effects

Zhang

Kan

et al. 2016

AIP Advances

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The sensitivity enhancement of piezoelectric force sensors is investigated based on multiple piezoelectric effects in this paper. At first, theoretical analysis showed that multiple piezoelectric effects had an influence on the piezoelectric force sensors. Secondly, a practicable method was adopted to perform the experimental validation and quantify the influence of multiple piezoelectric effects. In the method, different capacitors whose capacitances became much larger than that of the piezoelectric quartz sensor were in parallel with the quartz sensor. With the method, the details of the sensitivity enhancement of piezoelectric sensors were obtained. Experimental results showed that the sensor sensitivity increased from 4.00 pC/N to 4.07 pC/N when the capacitance of parallel capacitors was increased from 500 to 1000 and then 5000 times of that of the sensor. The force sensor sensitivity was improved by 1.75%. However, the nonlinearity and repeatability error of the force sensor were markedly increased with increasing the capacitance of the parallel capacitor. The method demonstrated that the piezoelectric force sensor sensitivity could be enhanced to a certain extent in the practical engineering, but it also brought some negative effects. Finally, further analysis indicated that multiple piezoelectric effects influenced the sensitivity by changing the piezoelectric coefficient. The well-known piezoelectric coefficient d11 of the quartz could actually reach 2.35 pC/N.

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Section: -2mentioning

confidence: 99%

Sensitivity enhancement of piezoelectric force sensors by using multiple piezoelectric effects

Zhang

Kan

et al. 2016

AIP Advances

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“…Since this type of sensor is not affected by leakage current, it can be effectively used for both dynamic and static measurements without the signal drift. Static force can be measured by using the change in the resonance frequency of the piezoelectric sensor [25][26][27][31][32][33]. The resonance frequency is determined by the effective stiffness (or spring constant) and mass of the sensor structure.…”

Section: Static Force Measurement Using Piezoelectric Sensorsmentioning

confidence: 99%

“…Electrical Impedance Measurement. Lin et al have demonstrated a static force sensing technique through electrical impedance (admittance) measurement of a piezoelectric resonant sensor [31]. A unimorph cantilever beam (UCB) with a PZT layer and an aluminum layer was used for the prototyped sensor to take advantages of simple structures compared to the Figure 2: Schematics of piezoelectric force sensors for static force measurements using the electrical impedance measurement method: (a) unimorph cantilever beam design, (b) hyperelastic sensing layer on the resonator design, and (c) embedded resonator design for the smart skin application.…”

Section: Static Force Measurement Using Piezoelectric Sensorsmentioning

confidence: 99%

“…Numerous designs of piezoelectric sensors have been suggested for static force sensing using various measurement parameters including the resonance frequency, decay time constant, and capacitance [25][26][27][28][29][30]. Recent studies also demonstrated that the electrical impedance or admittance amplitude at resonance (or antiresonance) varies by applied force-induced acoustic load variation with feasible sensitivity and linearity which can be effectively used for static force sensing [31][32][33]. Despite increasing attention for taking full advantage of piezoelectricity in static force sensing, a collective resource that provides a comprehensive review of each measurement mechanism is hardly available to date.…”

Section: Introductionmentioning

confidence: 99%

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Static Force Measurement Using Piezoelectric Sensors

Kim

Jiang

et al. 2021

Journal of Sensors

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In force measurement applications, a piezoelectric force sensor is one of the most popular sensors due to its advantages of low cost, linear response, and high sensitivity. Piezoelectric sensors effectively convert dynamic forces to electrical signals by the direct piezoelectric effect, but their use has been limited in measuring static forces due to the easily neutralized surface charge. To overcome this shortcoming, several static (either pure static or quasistatic) force sensing techniques using piezoelectric materials have been developed utilizing several unique parameters rather than just the surface charge produced by an applied force. The parameters for static force measurement include the resonance frequency, electrical impedance, decay time constant, and capacitance. In this review, we discuss the detailed mechanism of these piezoelectric-type, static force sensing methods that use more than the direct piezoelectric effect. We also highlight the challenges and potentials of each method for static force sensing applications.

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“…Among various types of accelerometers, piezoelectric materials such as ZnO [2], AIN [3], and lead zirconate titanate (PZT) [4] have been employed to fabricate the piezoelectric accelerometers.…”

Section: Introductionmentioning

confidence: 99%