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Purpose Flexible pressure sensor arrays have promising applications in analog haptics, reconfiguration of sensory functions, artificial intelligence, wearable devices and human-computer interaction. The force disturbance generated by the connecting material between the sensor array units will reduce the detection accuracy of the unit. The purpose of this paper is to propose a flexible pressure sensor with interference immunity capability. A C-type bridge flexible piezoelectric structure is used to improve the pressure perturbation. The interference immunity capability of the sensor has been improved. Design/methodology/approach In this paper, a C-type pressure sensor array structure by rapid injection moulding is manufactured through the positive piezoelectric effect of a piezoelectric material. The feasibility of C-type interference immunity structure in a flexible sensor array is verified by further analysis and experiment. A flexible pressure sensor array with C-type interference immunity structure has been proposed. Findings In this paper, we present the results of the perturbation experiment results of the C-type pressure sensor array, showing that the perturbation error is less than 8%. The test of the flexible sensor array show that the sensor can identify the curved angle of up to 120 °, and the output sensitivity of the sensor in the horizontal state reaches 0.12 V/N, and the sensor can withstand the pressure of 80 N. The flexible sensor can work stably in the stretch rate range of 0–8.6% and the stretch length range of 0–6 mm. Originality/value In this paper, C-type pressure sensor array structure is fabricated by rapid injection moulding for the first time. The research in this paper can effectively reduce the disturbance of input pressure on the sensor’s internal array and improve the output accuracy. The sensor can intuitively reflect the number of fingers sliding on the sensor by the order in which the maximum voltage appears. Due to the strong interference immunity capability and flexibility of the flexible sensor array mechanism, it has a broad application prospect in the practical fields of haptic simulation, perceptual function reconstruction, artificial intelligence, wearable devices and human–computer interaction.

Flexible electrodes are widely used in the manufacture of flexible sensors and wearable devices. However, with the development of science and technology and the large-scale utilization of metal resources, the question whether alternative materials can be found to ease the use of metal materials has been raised. Among them, paper-based electrodes have attracted special attention in the industry because of their degradability, low cost and high flexibility. Therefore, a low delay flexible paper-based electrode filled for capacitive sensors is proposed through carbon materials. Different from discussing the influence of single fiber, the paper-based electrode is manufactured by wet process. The effects of different fiber substrates on the physical properties and electrical signal properties of paper-based electrodes were discussed. The results show that the paper-based electrode has high conductivity, which is 18.52 S/cm. And there is a low delay in the process of electrical signal transmission. The phase frequency angle hardly changes at the signal frequency of 1 kHz, and the change of phase frequency angle is only 4.9 ° at the signal frequency of 300 kHz. The thickness of the guided electric paper is about 90 μm. Lower than common paper products. This study shows that the paper-based electrode has the advantages of high conductivity, low hysteresis, light and thin, which provides the possibility to be used as a flexible electrode.

Flexible power sources are crucial to developing flexible electronic systems; nonetheless, the current poor stretchability and stability of flexible power sources hinder their application in such devices. Accordingly, the stretchability and fatigue stability of flexible power sources are crucial for the practical application of flexible electronic systems. In this work, a flexible electrode with an arc-shaped star concave negative Poisson's ratio (NPR) structure is fabricated through the screen printing process. Using the combination of finite element analysis (FEA) and tensile tests, it is proven that the arc-shaped star concave NPR electrode can effectively reduce the maximum tensile stress and increase the maximum elongation (maximum elongation 140%). Furthermore, the flexible electrodes prepared in this study are assembled into all-solid-state symmetric supercapacitors (SSCs), and their electrochemical properties are tested. The SSC prepared in this study has a high areal capacitance of 243.1 mF cm

Biological gel artificial muscle (BGAM) has a promising future in the field of MEMS. In contrast to the material research of BGAM, relatively little research is conducted on the preparation process method of BGAM. Therefore, a water mist bonding method for the preparation of BGAM is proposed. The main application of the water mist bonding method is to complete the assembly of the electrode membrane with the electrically actuated membrane, and the actuation properties of the BGAM can be further enhanced. In this paper, experiments on mechanical, electrical, and actuation properties are conducted to investigate the effects of the water mist bonding process parameters on BGAM. The comprehensive experimental results revealed that BGAM possessed a more comprehensive optimization effect when the humidification time is 2.5 min: the bond strength reached the highest 0.92 MPa, the internal resistance, and elastic modulus are significantly reduced to 28 Ω and 2.08 MPa, respectively, and the output force response rate reached the highest 0.138 mN s−1. In conclusion, the water mist bonding process proposed does not require complicated equipment, features optimized BGAM actuation performance, and makes up for the lack of process methods for preparing BGAM at this stage.