雜貨鋪科學（20220331）通過類似于quipu的硅膠-液態(tài)金屬壓力傳感器進行低成本胃腸測壓
雜貨鋪指數(shù)：?????
（an overall device cost of less than US$0.26 per centimetre. 1塊五每厘米）
打結(jié)處為什么對壓力變化更敏感？
We speculated two reasons for the enhanced pressure sensitivity due to knotting. First, the process increased the aspect ratio of the catheter cross-section due to shear stress, which made it more sensitive to deformations than the unknotted case under the same loading conditions. Second, similar to serially connected springs, each catheter layer that was folded and stacked onto itself due to knotting experienced the same external pressure component perpendicular to the stacking plane, resulting in an amplification of the effective total pressure. （我們推測由于打結(jié)而增強壓力敏感性的兩個原因。 首先，由于剪切應力，該過程增加了導管橫截面的縱橫比，這使其在相同載荷條件下比未打結(jié)的情況下對變形更敏感。 其次，類似于串聯(lián)彈簧，由于打結(jié)而折疊并堆疊到自身上的每個導管層都經(jīng)歷了垂直于堆疊平面的相同外部壓力分量，從而導致有效總壓力的放大。）
真結(jié)繩記事.Quipu（也拼寫為 khipu）是一種記錄設(shè)備，由歷史上在南美洲安第斯山脈地區(qū)的許多文化中使用繩制成。
花絮：據(jù)悉作者因為疫情不能去實驗室做實驗，只好帶上簡陋的設(shè)備買簡單材料居家卷。在條件受限的情況下開創(chuàng)動腦筋創(chuàng)造了低成本測壓的新途徑。贊！?
液態(tài)金屬：
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13. Yeo, J. C., Yu, J., Koh, Z. M., Wang, Z. & Lim, C. T. Wearable tactile sensor based on flexible microfluidics. Lab Chip 16, 3244–3250 (2016).
14. Gao, Y. et al. Wearable microfluidic diaphragm pressure sensor for health and tactile touch monitoring. Adv. Mater. 29, 1701985 (2017).
15. Ma, Z. et al. Permeable superelastic liquid-metal fibre mat enables biocompatible and monolithic stretchable electronics. Nat. Mater. 20, 859–868 (2021)
