Evaluation of Sleeping Comfort of Bed Mattresses with Different Elastic Moduli for Each Body Region

Aoi, Masataka; Hashimoto, Kazuma; Yoshida, Hiroaki; Kamijo, Masayoshi

doi:10.1109/icbake.2013.28

Cited by 1 publication

(3 citation statements)

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“…On the one hand, the mattress indentation is obtained by analytical calculation rather than manual or electronic equipment measurements (Zhong et al. , 2014; Aoi et al. , 2015; Hong et al.…”

Section: Discussionmentioning

confidence: 99%

“…Compared with existing methods for measuring mattress indentation, this study has two distinct advantages. On the one hand, the mattress indentation is obtained by analytical calculation rather than manual or electronic equipment measurements (Zhong et al, 2014;Aoi et al, 2015;Hong et al, 2022a, b). In particular, the load distribution can be obtained through the embedded control system and mechanical modes of the air-spring mattress, which is directly processed and analyzed by the embedded system of the mattress and is suitable for the intelligent mattress.…”

Section: Advantages Of the Proposed Calculation Methodsmentioning

confidence: 99%

“…Furthermore, a primary issue is that the spinal alignment data obtained by the above method cannot communicate with the intelligent mattress control system for further processing. Instead, the indentation measured by the electronic devices can be processed and analyzed by the embedded control system of an intelligent mattress (Aoi et al. , 2015).…”

Section: Introductionmentioning

confidence: 99%

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Method and finite element verification of indentation calculation for a novel air-spring mattress: for estimating spinal alignment in sleep postures

Chao,

Liu,

Shen

2023

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PurposeThis study aimed to develop a method to calculate the mattress indentation for further estimating spinal alignment.Design/methodology/approachA universal indentation calculation model is derived based on the system theory, and the deformation characteristics of each component are analyzed by the finite element (FE) model of a partial air-spring mattress under the initial air pressure of 0.01–0.025 MPa. Finally, the calculation error of the model is verified.FindingsThe results indicate that the indentation calculation model could describe the stain of a mattress given the load and the constitutive model of each element. In addition, the FE model of a partial air-spring mattress can be used for further simulation analysis with an error of 1.47–3.42 mm. Furthermore, the deformation of the series system is mainly contributed by the air spring and the components directly in contact with it, while the top component is mainly deflection deformation. In addition, the error of the calculation model is 2.17–5.59 mm on the condition of 0.01–0.025 MPa, satisfying the engineering application. Finally, the supine spinal alignment is successfully extracted from the mattress indentation.Research limitations/implicationsThe limitation of this study is that it needs to verify the practicality of the indentation calculation model for the Bonnier spiral spring mattress. The main feature of the Bonnier spring mattress is that all springs are connected, so the mattress deflection and neighborhood effect are more significant than those of the air-spring mattress. Therefore, the applicability of the model needs to be tested. Moreover, it is worth further research to reduce the deformation error of each component.Practical implicationsAs part of the series of studies on the intelligent air-spring mattress, the indentation-based evaluation method of spinal alignment in sleep postures will be studied for hardness and intelligent regulation based on this study.Social implicationsThe results of this research are ultimately used for the intelligent adjustment of air-spring mattresses, which automatically adjusts the hardness according to the user's sleep postures and spinal alignment, thus maintaining optimal spinal biomechanics. The successful application of this result could improve the sleep health of the general public.Originality/valueBased on the series system theory, an indentation calculation model for mattresses with arbitrary structure is proposed, overcoming the dependence of parameters on materials and their combinations when fitting the Burgers model. Further, the spinal alignment in supine posture is extracted from the indentation, laying a theoretical foundation for further recognition and adjustment of the spinal alignment of the intelligent mattress.

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Section: Discussionmentioning

confidence: 99%

Section: Advantages Of the Proposed Calculation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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