Wireless SAW passive tag temperature measurement in the collision case

Abstract

Abstract. This paper describes temperature measurement in the multisensor systems based on the radio-frequency identification SAW passive tags which are currently applied in the electric power systems and the switchgears. Different approaches of temperature measurement in the collision case are shown here. The study is based on the tag model with specific topology, which allows us to determine temperature through the response signal with time-frequency information. This research considers the collision case for several passive tags as the temperature sensors which are placed in the switchgear. This research proposal is to analyze the possibility of using several SAW passive sensors in the collision case. We consider the using of the different typical elements for passive surface acoustic wave tag which applies as an anticollision passive sensor. These wireless sensors based on the surface acoustic waves tags contain specifically coded structures. This topology makes possible the reliability of increasing tag identification and the temperature measurement in the collision case. As the results for this case we illustrate simultaneous measurement of at least six sensors. IntroductionModern solutions in the field of monitored parameters should meet the requirements of increased noise immunity. In addition, they should have high speed, resistance to external climatic influences, high reliability and durability in operation. Modern monitoring based on radio frequency systems should be passive (without any energy source). Such requirements are met by radio frequency identification (RFID) technology, based on the use of passive acoustoelectronic devices on surface acoustic waves (SAW) [1], [2].For temperature monitoring, RFID reader interrogates several passive SAW tags which are placed on the monitored object. However, in the simultaneous monitoring of several temperature sensors is limited to the problem of collision for passive acoustoelectronic RFID devices. In the case when several sensors are interrogated simultaneously, their response signals can overlap each other in the time domain, making it impossible to read the code of each device and obtain information about the temperature.The last analysis shows that solutions cannot satisfy the actual tasks of monitoring and control objects with a wide temperature range and certain operating conditions in the collision case. This problem is the most evident in multisensory systems which are using the electric power systems. The temperature is the most important indicator of the electrical equipment current status. It makes possible to provide information about the emergency and electrical fire caused by short circuit or overheating of the equipment in the switchgear. Monitoring systems which are applied for temperature measurement would increase reliability and safety of high-voltage equipment.

Development of Temperature Sensor Based on AlN/ScAlN SAW Resonators

“…With the rapid development of the internet of things (IoT) technology, higher requirements are being put forward for sensing technology [1]. As a kind of acoustic wave device based on piezoelectric materials, surface acoustic wave sensors have become major research objects due to their quick response, high sensitivity, and ability of wireless measurement [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

“…In sensing applications, temperature sensors have become an essential tool in many fields, such as chemical, machinery, etc. [2][3][4][5][6] As temperature sensors, SAW resonators can be used not only for wired measurements [7][8][9][10], but also wireless measurements in extreme environments [2,3,5,11,12,[14][15][16]. The wired sensor has a stable signal output and strong anti-interference ability, but a wired connection makes it impossible to apply to situations involving fast movement or with high sealing performance requirements.…”

Determination of the beginning the Steady-State for controlled processes in monitoring systems with limited resources

“…These systems encounter distinctive conditions such as temperature sensor tolerance and inertia. For highly accurate sensors, which could be used in monitoring systems [1,2], a simple temperature measurement could be applicable. 1 displays the temperature curve and specific key moments in the boiling process of water: start of the boiling process, moment when the system reaches boiling point, and the switching off point.…”

“…In other words, there is a delay before the system receives the data. This could be a critical point for high-accuracy monitoring systems applied in the automation industry, aerospace, and aviation [1][2][3][4][5].…”