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Micromachined microsensors for manufacturing
The rapid development of microelectromechanical systems (MEMS) technologies in recent years has provided a high degree of spatial miniaturization and integration of electromechanical components,…
Definition of Instantaneous Dielectric Loss Factor and Digital Algorithm for Online Monitoring
- Qingmin Li, Li Zhang, Tong Zhao
- Engineering, Computer ScienceIEEE Transactions on Instrumentation and…
A unique definition and a corresponding digital algorithm of the instantaneous dielectric loss factor is presented and it is shown that the proposed algorithm renders good application performance without being affected by the limitations incurred from synchronous sampling and harmonics.
Design of ultrasonic transmitters with defined frequency characteristics for wireless pressure sensing in injection molding
- Li Zhang, C. Theurer, R. Gao, D. Kazmer
- Materials ScienceIEEE Transactions on Ultrasonics, Ferroelectrics…
- 19 September 2005
A new mechanical wireless data transmission technique using ultrasonic waves as the information carrier for on-line injection mold cavity pressure measurement and results were in good agreement with the analysis, thus confirming the design approach.
Energy extraction for a self-energized pressure sensor
With the prolific use of sensors for manufacturing process monitoring, proper power supply and installation scheme has assumed an increasingly central role. Cable-based sensor powering, while…
Passive charge modulation for a wireless pressure sensor
A wireless pressure sensor is described for use in a high-pressure manufacturing process with three major subsystems: energy conversion by a stack of piezoelectric disks, energy measurement and…
An Innovative Semicircular Spiral Antenna for On-Metal Passive RFID Applications
The special geometric layout of actual engineering project requires the tag to be placed in a special metal cavity, which severely blocks the propagation of the electromagnetic (EM) field from the…
Noncontact healthy status sensing using low-power digital-IF Doppler radar
- Hong Hong, Heng Zhao, Li Zhang, Chuanwei Ding, Xiaohua Zhu
- Computer ScienceShort-Range Micro-Motion Sensing with Radar…
- 26 June 2019
The compressed sensing (CS)-based method is proposed to enhance the resolution of the vital sign spectrum, and the synchrosqueezing transform (SST)-based algorithm is used to extract the instantaneous vital signs.
Digital-IF CW Doppler radar and its contactless healthcare sensing
Recently, developed from the conventional application of vital sign detection, the digital-IF Doppler radar is widely applied for healthcare sensing and can not only work as a single sensor but also serve as a sensor in the multi-sensor network.