scholarly journals Research on Radio Frequency Energy Acquisition Technology Used in Partial Discharge Sensors

2021 ◽  
Vol 2136 (1) ◽  
pp. 012026
Author(s):  
Xinzhe Li ◽  
Ming Ren ◽  
Haoyang Tian
Keyword(s):  
Low Power ◽  
Radio Frequency ◽  
Control Method ◽  
Partial Discharge ◽  
Low Power Design ◽  
Mode Switching ◽  
Small Signal ◽  
Ultra Low Power ◽  
Radio Frequency Energy ◽  
Energy Acquisition

Abstract To solve the energy supply problem of distributed sensor nodes for power equipment condition monitoring, the radio frequency energy acquisition technology scheme and low power consumption control method suitable for this type of sensor are studied. In the research of radio frequency energy technology, a high-gain radio frequency receiving unit is designed to convert a specific frequency high-frequency spatial electromagnetic wave into a AC small signal, and a radio frequency-voltage doubler rectifier unit is designed to convert the AC small signal into a DC signal and boost it, a supporting energy management unit is designed to control the energy interaction with the back-end sensor and provide a reliable and stable DC voltage to the partial discharge sensor. In terms of low-power control, the hardware adopts frequency-reduction detection and low-power devices, and the software proposes a work mode switching strategy, forming an ultra-low power design and application scheme for partial discharge sensors.

scholarly journals Optimal Design of Antenna for Radio Frequency Energy Acquisition System

2021 ◽  
Vol 2136 (1) ◽  
pp. 012007
Author(s):  
Xinzhe Li ◽  
Ming Ren ◽  
Haoyang Tian
Keyword(s):  
Radio Frequency ◽  
Low Cost ◽  
Research Field ◽  
Simulation Software ◽  
Ultra Low Power ◽  
Radio Frequency Energy ◽  
Impedance Characteristics ◽  
Wide Range ◽  
Receiving Antenna ◽  
Energy Acquisition

Abstract At present, many sensors are gradually developing in the direction of ultra-low power consumption, miniaturization, and low cost, which makes radio frequency energy acquisition technology a popular research field with a wide range of applications. However, traditional sensors are generally powered by batteries, which greatly increases the size of the device. Furthermore, antenna is an important module for radio frequency energy acquisition, and optimization of its sensitivity and other performance is particularly important. This article uses HFSS electromagnetic simulation software to simulate antenna elements and arrays made of PTFE, and simulates various parameters. And optimization, an antenna array element whose port impedance characteristics and unit antenna gain both meet the design requirements is constructed. Finally, the gain of the 2×2 array antenna after parameter optimization is 13.8dB, which greatly improves the gain of the receiving antenna.

scholarly journals Autonomous micro-platform for multisensors with an advanced power management unit (PMU)

2018 ◽  
Vol 7 (1) ◽  
pp. 299-308 ◽  
Author(s):  
Pierre Bellier ◽  
Philippe Laurent ◽  
Serguei Stoukatch ◽  
François Dupont ◽  
Laura Joris ◽  
...  
Keyword(s):  
Low Power ◽  
Power Management ◽  
Sampling Rate ◽  
Low Power Design ◽  
Management Unit ◽  
Sensor Data ◽  
Storage Device ◽  
Processing Unit ◽  
Ultra Low Power ◽  
Power Management Unit

Abstract. In this work, we developed and characterised an autonomous micro-platform including several types of sensors, an advanced power management unit (PMU) and radio frequency (RF) transmission capabilities. Autonomy requires integration of an energy harvester, an energy storage device, a PMU, ultra-low-power components (including sensors) and optimized software. Our choice was to use commercial off-the-shelf components with low-power consumption, low cost and compactness as selection criteria. For the multi-purpose micro-platform, we choose to include the most common sensors (such as temperature, humidity, luminosity, acceleration, etc.) and to integrate them in one miniaturised autonomous device. A processing unit is embedded in the system. It allows for data acquisition from each sensor individually, simple data processing, and storing and/or wireless data transmission. Such a system can be used as stand-alone, with an internal storage in a non-volatile memory, or as a node in a wireless network, with bi-directional communication with a hub device where data can be analysed further. According to specific application requirements, system settings can be adjusted, such as the sampling rate, the resolution and the processing of the sensor data. Parallel to full autonomous functionality, the low-power design enables us to power the system by a small battery leading to a high degree of autonomy at a high sampling rate. Therefore, we also developed an alternative battery-powered version of the micro-platform that increases the range of applications. As such, the system is highly versatile and due to its reduced dimensions, it can be used nearly everywhere. Typical applications include the Internet of Things, Industry 4.0, home automation and building structural health monitoring.

scholarly journals Low-power integrated transmitter design using frequency multiplication techniques

2020 ◽  
Author(s):  
Markus Stadelmayer ◽  
Tim Schumacher ◽  
Thomas Faseth ◽  
Harald Pretl
Keyword(s):  
Low Power ◽  
Radio Frequency ◽  
Short Range ◽  
Cmos Process ◽  
Power Demand ◽  
Frequency Multiplication ◽  
Ultra Low Power ◽  
Third Harmonic ◽  
Harmonic Extraction ◽  
Transmitter Design

Abstract This paper proposes an approach to employ frequency multiplication techniques like edge-combining and third harmonic extraction in ultra-low-power integrated transmitter design. The overall power demand of the transmitter is reduced by keeping operating frequency of its components low. For that reason, edge-combining and third harmonic extraction are integrated directly into a switched mode power amplifier. Hence, the radio frequency signal is generated just before it is fed to the antenna. This leads to a reduced power demand of the overall transmitter in comparison to conventional designs where the oscillator and other components are operated directly at the radio frequency. Within this paper we propose an amplifier that generates a 2.4 GHz carrier frequency from a ring oscillator running at a low 200 MHz resulting in a frequency multiplication factor of twelve. The exemplary design is targeted to be used in ultra-low-power short range applications. Hence, our simulations using extracted layout models show that the amplifier provides an output power of approximately -12 dBm at a supply voltage of 0.6 V while consuming 2.4 mW of power fully integrated in a 180 nm 1P6M CMOS process. This demonstrates that the proposed techniques are especially suitable for ultra-low-power transmitter in short range applications. That includes medical and body area network applications.

scholarly journals Power-Saving Design of Radio Frequency Identification Sensor Networks in Bus Seatbelt Monitoring Systems

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5882
Author(s):  
Sitong Sun ◽  
Wen Yang ◽  
Wilson Wang
Keyword(s):  
Sensor Networks ◽  
Low Power ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Power Saving ◽  
Low Power Design ◽  
Sensor Nodes ◽  
Design Approach ◽  
Registration Method ◽  
Frequency Identification

Seatbelt state monitoring is important in intercity buses for passenger safety. This paper discusses the issues and challenges in power-saving design of radio frequency identification (RFID) sensor networks in bus seatbelt monitoring. A new design approach is proposed in this work for low-power layout and parameter setting in RFID sensor nodes in hardware and software design. A one-to-many pairing registration method is suggested between the concentrator and the seat nodes. Unlike using extra computer software to write seat identification (ID) into an integrated circuit (IC) card, the node ID in this project can be stored into the concentrator directly, which can reduce intermediate operations and reduce development costs. The effectiveness of the proposed low-power design approach is verified by some experimental tests.

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