In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a tran...In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a transducer element.In addition,a digital intellectual property(IP) is designed in FPGA to achieve signal processing and fusion of integrated resonators.A testing system for digital quartz resonant accelerometers is established to characterize the performance under different conditions.The scale factor of the accelerometer prototype reaches 3561.63 Hz/g in the range of -1 g to +1 g,and 3542.5 Hz/g in the range of-10 g to+10 g.In different measurement ranges,the linear correlation coefficient R~2 of the accelerometer achieves greater than 0.998.The temperature drift of the accelerometer prototype is tested using a constant temperature test chamber,with a temperature change from -20℃ to 80℃.After temperature-drift compensation,the zero bias temperature coefficient falls to 0.08 mg/℃,and the scale factor temperature coefficient is 65.43 ppm/℃.The experimental results show that the digital quartz resonant accelerometer exhibits excellent sensitivity and low temperature drift.展开更多
Tactile sensing has been a key challenge in robotic haptics.Inspired by how human skin sense the stress field with layered structure and distributed mechanoreceptors,we herein propose a design for modular multi-parame...Tactile sensing has been a key challenge in robotic haptics.Inspired by how human skin sense the stress field with layered structure and distributed mechanoreceptors,we herein propose a design for modular multi-parameter perception electronic skin.With the stress field sensing concept,complex tactile signals can be transformed into field information.By analyzing the stress field,the realtime three-dimensional forces can be resolved with 1.8°polar angle resolution and 3.5°azimuthal angle resolution(achieved up to 71 folds of improvement in spatial resolution),we can also detect the hardness of object in contact with the electronic skin.Moreover,we demonstrate random assembly of the sensing arrays and integration of our electronic skin onto differently curved surfaces do not lead to any measurement variation of the stress field.This result reveals that the sensing elements in our electronic skin system can be modularly made and exchanged for specific applications.展开更多
文摘In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a transducer element.In addition,a digital intellectual property(IP) is designed in FPGA to achieve signal processing and fusion of integrated resonators.A testing system for digital quartz resonant accelerometers is established to characterize the performance under different conditions.The scale factor of the accelerometer prototype reaches 3561.63 Hz/g in the range of -1 g to +1 g,and 3542.5 Hz/g in the range of-10 g to+10 g.In different measurement ranges,the linear correlation coefficient R~2 of the accelerometer achieves greater than 0.998.The temperature drift of the accelerometer prototype is tested using a constant temperature test chamber,with a temperature change from -20℃ to 80℃.After temperature-drift compensation,the zero bias temperature coefficient falls to 0.08 mg/℃,and the scale factor temperature coefficient is 65.43 ppm/℃.The experimental results show that the digital quartz resonant accelerometer exhibits excellent sensitivity and low temperature drift.
基金supported by the joint funding program of Department of Science and Technology of Guangdong Province and the Innovation and Technology Fund of Hongkong under grant 2021A0505110015by the Science and Technology Innovation Council of Shenzhen under grants KQTD20170810105439418 and JCYJ20200109114237902.
文摘Tactile sensing has been a key challenge in robotic haptics.Inspired by how human skin sense the stress field with layered structure and distributed mechanoreceptors,we herein propose a design for modular multi-parameter perception electronic skin.With the stress field sensing concept,complex tactile signals can be transformed into field information.By analyzing the stress field,the realtime three-dimensional forces can be resolved with 1.8°polar angle resolution and 3.5°azimuthal angle resolution(achieved up to 71 folds of improvement in spatial resolution),we can also detect the hardness of object in contact with the electronic skin.Moreover,we demonstrate random assembly of the sensing arrays and integration of our electronic skin onto differently curved surfaces do not lead to any measurement variation of the stress field.This result reveals that the sensing elements in our electronic skin system can be modularly made and exchanged for specific applications.
