Ever-rising skyscrapers and the growing number of densely populated large cities face an increased danger from earthquakes. To lessen the risk of this natural disaster, critical facilities must be equipped by a reliable warning system. However, conventional sensors which detect the velocity and acceleration of the seismic vibrations, consumes an external power, which cannot be placed in many buildings due to limitations in electricity supply. In this work, a self-powered seismic sensor is fabricated using the three-dimensional printing technology. The proposed device can be operated based on the triboelectricity, which converts an external mechanical energy into an electrical energy. The proposed device exhibits an exceptional behavior of a friction-free due to its sophisticated designed structure with a levitating oscillator. The fundamental parameters representing the device performance are systematically analyzed with various operation mode. Water-assisted oxidized Al electrodes allow full-contact with the polytetrafluoroethylene triboelectric oscillator film, subsequently, produce the highest values of output parameter as follows; an open-circuit voltage of 29.44 V, a short-circuit current of 204 nA, and a peak power density of 2.501 mW/m² at a load resistance of 50 MΩ. Frequency reversibility is also demonstrated from the frequency response of the short-circuit current during the operation in lateral-contact mode. Because of inherently friction-free characteristics of the proposed device, this device shows high sensitivity, low sensing limit, and long residual signal, which is experimentally verified. In order to test the sensing ability of the device, artificial seismic vibrations are applied with vertical forces of 4 N and 2.4 N. An alert software program displays the sensing ability of the device with the signals over 1 V, which is the threshold voltage. The stability of the device in humid conditions and its durability for 3100 s in the output voltage measurement represent the possibility of this device as a reliable sensor. Due to the simple three-dimensional printing technology and its inherently friction-free characteristics, the proposed device can be employed as a self-powered sensor capable of warning about dangerous earthquake disasters.

不断上升的摩天大楼和人口稠密的大城市越来越多，面临地震的危险越来越大。为了减少这种自然灾害的风险，关键设施必须配备可靠的警告系统。然而，检测地震振动的速度和加速度的常规传感器消耗外部电源，由于电力供应的限制，该外部电源不能放置在许多建筑物中。在这项工作中，使用三维打印技术制造了自供电地震传感器。可以基于摩擦电来操作所提出的设备，该摩擦电将外部机械能转换为电能。所提出的装置由于具有悬浮振荡器的复杂设计结构而表现出无摩擦的优异性能。代表器件性能的基本参数已通过各种操作模式进行了系统分析。水辅助氧化的Al电极可与聚四氟乙烯摩擦电振荡器薄膜完全接触，随后产生如下最大输出参数值；开路电压为29.44 V，短路电流为204 nA，峰值功率密度为2.501 mW / m²在50MΩ的负载电阻下。在横向接触模式下运行期间，短路电流的频率响应也表明了频率可逆性。由于所提出的设备具有固有的无摩擦特性，因此该设备显示出高灵敏度，低检测极限和长残留信号，这已通过实验验证。为了测试设备的感测能力，在4 N和2.4 N的垂直力下施加了人工地震振动。警报软件程序使用超过1 V的信号（阈值电压）显示设备的感测能力。该设备在潮湿条件下的稳定性及其在输出电压测量中持续3100 s的耐久性表明该设备有可能成为可靠​​的传感器。