Dynamic contact stress analysis using a compliant sensor array

Prutchi, David; Arcan, M.

doi:10.1016/0263-2241(93)90039-k

Cited by 33 publications

(21 citation statements)

References 17 publications

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“…Fig. 3 shows a schematic of the TDCA, where an additional transistor (or a diode) is added in series with each sensor, to guarantee that there are no crosstalk currents flowing across multiple sensors [10][11][12][13][14]. MOAA requires multiplexers to control scanning and reading of sensors.…”

Section: B Determination Of a Unique Set Of Sensor Resistancesmentioning

confidence: 99%

“…Readout strategies for resistive sensor arrays can be, in general, subdivided into three categories, transistor/diode controlled approach (TDCA) [10][11][12][13][14], multiplexer and op-amp assisted approach (MOAA) [1,3,[15][16][17][18][19][20][21][22], and incidence matrix approach (IMA) [8,23,24]. Nevertheless, these approaches have contributed to a noticeable complexity in circuits, especially for large-scale arrays, as they require a considerable number of additional electrical components (transistors, diodes, multiplexers, switches, op-amps, current sources, A/D converters (ADCs), etc.).…”

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confidence: 99%

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A New Approach for Readout of Resistive Sensor Arrays for Wearable Electronic Applications

2015

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Resistive sensor arrays have been increasingly adopted in wearable electronic applications, which require low-complexity and low-energy circuits. However, current readout strategies for resistive sensor arrays require additional electrical components such as transistors, diodes, multiplexers, op-amps, switches, current sources and A/D converters, leading to a considerable increase in circuit complexity, power consumption, system instability and crosstalk error. To address the problem, this paper proposes a new approach, which determines sensor resistance values by establishing and solving resistance matrix equations of sensor arrays. Unlike conventional approaches, it allows crosstalk currents in arrays to avoid additional components that are originally used for eliminating crosstalk currents and minimizing crosstalk error. Meanwhile, it takes advantage of on-chip resources of wearable platforms, thereby reducing redundant chips. It was implemented on a prototype of 10×10 textile resistive sensor array, which was taken in a sensing cushion for sitting pressure monitoring of chair bound people. Experimental results on this array platform showed the new approach achieved a satisfactory accuracy (0.61±0.41%), as well as a low crosstalk error (2.77±0.61‰). The fabricated sensing cushion also exhibited a relatively low pressure measurement error (6.30±0.75%). Compared with other approaches, the proposed approach demonstrated the lowest circuit complexity on a microcontroller based wearable platform, and a sufficient sensor capacity. It is ideal for a wide range of applications like wearable or implantable sensing, presenting a reference for the design of low-complexity and low-crosstalk error wearable systems based on resistive sensor arrays.

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Section: B Determination Of a Unique Set Of Sensor Resistancesmentioning

confidence: 99%

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confidence: 99%

A New Approach for Readout of Resistive Sensor Arrays for Wearable Electronic Applications

2015

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“…(Prutchi and Arcan 1993;Tanak et al 1996;D'Alessio, 1999;Cariaa, Cadeddua, Laib, Sesselegoa, and Quaratia 2002;Lu, Marschner, Eisenmann, and Sauer 2002;Torquemada et al 2003;Kim, Han, Nguyen, Shin, and Moon 2004;Depari et al 2007;Lichtenwalner, Hydrick, and Kingon 2007;Saxena, Bhan, and Aggarwal 2008a;Saxena, Bhan, Jalwania, Rana, and Lomash 2008b;Saxena, Bhan, and Aggarwal 2009) Larger arrays are usually required for resolution enhancement but the large size increases the required number of interconnections, making electrical access difficult. Sharing of rows and columns in these arrays is an attractive technique for reducing the number of interconnections from N .…”

Section: Introductionmentioning

confidence: 96%

Crosstalk suppression in networked resistive sensor arrays using virtual ground technique

Saxena

Semwal

Rana

et al. 2013

International Journal of Electronics

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In 2D resistive sensor arrays, the interconnections are reduced considerably by sharing rows and columns among various sensor elements in such a way that one end of each sensor is connected to a row node and other end connected to a column node. This scheme results in total N þ M interconnections for N Â M array of sensors. Thus, it simplifies the interconnect complexity but suffers from the crosstalk problem among its elements. We experimentally demonstrate that this problem can be overcome by putting all the row nodes at virtually equal potential using virtual ground of high gain operational amplifiers in negative feedback. Although it requires large number of opamps, it solves the crosstalk problem to a large extent. Additionally, we get the response of all the sensors lying in a column simultaneously, resulting in a faster scanning capability. By performing lock-in-amplifier based measurements on a light dependent resistor at a randomly selected location in a 4 Â 4 array of otherwise fixed valued resistors, we have shown that the technique can provide 86 dB crosstalk suppression even with a simple opamp. Finally, we demonstrate the circuit implementation of this technique for a 16 Â 16 imaging array of light dependent resistors.

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“…For accessing all elements in the M × N resistive sensor arrays with low complexity, many readout circuits, including the inserting diode circuit [8,9], the inserting transistor circuit [5,10], the passive integrator circuit [11,12], the voltage feedback circuit (VFC) [4,6,13,14,15,16], and the zero potential circuit (ZPC) [2,3,17,18,19,20,21], were proposed with M shared row wires and N shared column wires, in which one end of each element was connected with one shared row wire and the other end of the element was connected with one shared column wire. In these readout circuits, the VFC and the ZPC were applied more widely.…”

Section: Introductionmentioning

confidence: 99%

An Improved Zero Potential Circuit for Readout of a Two-Dimensional Resistive Sensor Array

Wang

et al. 2016

Sensors

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With one operational amplifier (op-amp) in negative feedback, the traditional zero potential circuit could access one element in the two-dimensional (2-D) resistive sensor array with the shared row-column fashion but it suffered from the crosstalk problem for the non-scanned elements’ bypass currents, which were injected into array’s non-scanned electrodes from zero potential. Firstly, for suppressing the crosstalk problem, we designed a novel improved zero potential circuit with one more op-amp in negative feedback to sample the total bypass current and calculate the precision resistance of the element being tested (EBT) with it. The improved setting non-scanned-electrode zero potential circuit (S-NSE-ZPC) was given as an example for analyzing and verifying the performance of the improved zero potential circuit. Secondly, in the S-NSE-ZPC and the improved S-NSE-ZPC, the effects of different parameters of the resistive sensor arrays and their readout circuits on the EBT’s measurement accuracy were simulated with the NI Multisim 12. Thirdly, part features of the improved circuit were verified with the experiments of a prototype circuit. Followed, the results were discussed and the conclusions were given. The experiment results show that the improved circuit, though it requires one more op-amp, one more resistor and one more sampling channel, can access the EBT in the 2-D resistive sensor array more accurately.

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Dynamic contact stress analysis using a compliant sensor array

Cited by 33 publications

References 17 publications

A New Approach for Readout of Resistive Sensor Arrays for Wearable Electronic Applications

A New Approach for Readout of Resistive Sensor Arrays for Wearable Electronic Applications

Crosstalk suppression in networked resistive sensor arrays using virtual ground technique

An Improved Zero Potential Circuit for Readout of a Two-Dimensional Resistive Sensor Array

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