The traditional way of cleaning the cement storehouse wall is manual storage, which is very dangerous. The collapse of the accumulated material causes casualties. In view of the current needs of cleaning, this paper designs a kind of machine which is suitable for the cleaning of domestic cement warehouse. The machine has the advantages of light weight, assembling and being suitable for any diameter warehouse. In this paper, the design scheme and mechanical structure of the machine are studied, and the working principle of the device is introduced. Finally, the static analysis of the finite element software is used to check the key parts and verify the correctness of the design scheme.

TiO2 nanofibers (p-TDNF) were synthesized by electrospinning and highly active TiO2 nanofibers (m-TDNF) were obtained by electron beam treatment of p-TDNF and assessed for the enzyme immobilization and biosensing applications. Studies have shown surface defects and Ti 3+ are formed on m-TDNF. Significantly, the better electron conduction properties were exhibited for glucose oxidase (GOD) immobilized on m-TDNF, and favorable electrocatalytic properties for glucose detection can be acquired. Impressively, GOD/m-TDNF/Nafion/GCE glucose biosensor exhibits high sensitivity of 12.5 μAmM-1 cm-2 and low detection limit of 0.9 μM as well as excellent selectivity and stability. Moreover, the accurate glucose determination and good recoveries in human blood serum implied their enormous potentiality in the practical applications. These results indicate that the preparation of m-TDNF offers a novel idea for the development of glucose biosensors.

TiO2 nanotube arrays (TNAs) are promising low-cost biosensor materials due to their large specific surface area and catalytic activity. Nevertheless, the detection efficiency of TNAs enzymatic glucose biosensors is affected by the amount of glucose oxidase adsorbed and the rate of electron transport. Here, we reveal that the adsorption capacity and electron transport rate of TNAs can introduce more active sites by annealing under an argon atmosphere to form oxygen vacancies, resulting in the generation of highly active surfaces and a significant improvement in the adsorption and conductivity properties. These manufactured highly active TNAs enzymatic glucose biosensors exhibit good electrochemical performance for the oxidation of glucose with a sensitivity of 8.5 μAmM -1 cm -2 , and a detection limit as low as 3.2 μM. Our study represents a simple method for the preparation of highly stable and selective TNAs enzymatic glucose biosensors by defect engineering, providing a novel concept for the manufacture of other enzyme biosensors.

When combined with diverse sensors, soft robots significantly improve their functionalities and intelligence levels. However, most of the existing soft sensors require complex signal analysis devices or algorithms, which severely increase the complexity of soft robot systems. Here, based on the unique fluidic property of liquid metal, we propose a magnet-controllable soft microswitch that can be well-integrated into a soft robot system, e.g., a soft gripper to help it facilely detect and precisely grab objects. The microswitch consists of a flexible soft beam electrode and a fixed electrode, forming a soft microsystem. By tuning the cohesion force of the liquid metal between the electrodes, the microswitch can convert its states between an individual and a self-locking state. The microswitch can achieve a reasonable rapid response (~12 ms) and high switching frequency (~95 Hz). Furthermore, soft microswitches can be customized into logic units and also coupled to control a digital tube showing various numbers. Our work provides a new simple soft sensor unit that may enhance the intelligence of soft systems.

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