How much does one mile of fence cost versus one mile of technology (high frequency sensors, etc). A mile of technology costs $1 million while the fence is many many multiples of that.
Moreover, the stabilizing controller is required to be band-pass, in order to filter out high-frequency sensor noise and low-frequency accelerometer drift, and stable to increase robustness to uncertain parameters.
The proposed ultra high frequency SAW sensor (314.5 MHz) shows a large total frequency change and gives a sharp inflexion at the DT but possesses the same stability compared with that of low frequency serial piezoelectric quartz crystal (PQC) sensor for the measurement of bacteria concentration.
High frequency RFID sensors are attractive in diverse applications where sensor performance is required at a low cost and dimension restriction.
The model was equipped with accurate and high frequency pressure sensors and the tests were conducted at Mach numbers varying from 1.8 to 2.5, at various angles of attack, and at different mass flow rates.
The proposed strategy is tested by comparing predictions of the computed noise with experimental results obtained for a full helicopter engine with high frequency pressure sensors located in the chamber and in all turbine stages.
A major issue that concerns the efficient operation of an underwater object's guidance system (which is achieved by high frequency acoustic sensors mounted within the nose region), is the hydrodynamic noise produced due to the fluctuating vapor water interface.
Dissolved oxygen concentrations of the surface waters were also monitored at 10-min intervals using high frequency in situ sensors.
This paper presents a high frequency micro-magnetic field sensor composed of a surface acoustic wave (SAW) transponder and a giant magnetoimpedance (GMI) sensitive element.
This paper presents compact thin film microfluxgate sensors working in the range of tenths of kHz to tenths of MHz which exhibit improved factor of merit (FOM) in the high frequency range when the sensor size is reduced.
During HFOV (High Frequency Oscillator Ventilator 3100b; Sensor Medics, Yorba Linda, CA, USA) the CDP (= Pmean) was increased in steps of 5 mbar from 20, to 25 and 30 mbar every 30 minutes.
