IEEE Sensors Journal

The main objective of the current discussion was to decorate the polypyrrole (PPy) supported with copper (Cu) nanoparticles on alkali anodized steel (AS) electrode for detection of glucose in human saliva and serum samples. Initially, the steel was anodized in 10 M NaOH, and then, the electrodeposition method was applied for fabrication of CuNPs and PPy at room temperature. First time, we prepared... View full abstract»

An olfactory display for blending many ingredients at any recipe was developed. It consists of microdispensers based upon solenoid valves and surface acoustic wave atomizer. The accuracy and stability were much improved compared with previous olfactory display using micropumps. Then, its blending capability was tested using sensory test such as triangle test. It was found that the scent blended in... View full abstract»

It is of great importance to measure tetrabromobisphenol A (TBBPA) owing to its high toxicity and wide existence in the environment. In this paper, an electrochemical sensor based on boron-doped diamond (BDD) thin film was developed for the detection of TBBPA. The diamond thin film was deposited on Si substrate via filament-assisted chemical vapor deposition. Due to the great electrochemical prope... View full abstract»

Mercury (Hg2+) ion is one of the heavy metal ions present in water and highly poisonous to human consumption. Thus, developing an efficient sensor for detection of mercury ions at different concentration levels in the water down to nM is essential. Here, we report the development of fluorometric sensor using the fluidic MEMS device (i.e., microfluidic device) with high sensitivit... View full abstract»

This paper proposes a novel embedded surface acoustic wave (SAW) pressure sensor for monitoring civil engineering structures. The sensor consists of a pressure cell and a sensing chip in a metal housing. The whole interior of the sensor is filled with silicone oil for pressure transfer. The sensing chip is a SAW die packaged in a seal cavity to monitor the pressure of the silicone oil. Therefore, ... View full abstract»

Flexural ultrasonic transducers are a widely available type of ultrasonic sensor used for flow measurement, proximity, and industrial metrology applications. The flexural ultrasonic transducer is commonly operated in one of the axisymmetric modes of vibration in the low-kilohertz range, under 50 kHz, but there is an increasing demand for higher frequency operation, towards 300 kHz. At present, the... View full abstract»

With the advantage of low cost and small size, a hall sensor has been exploited to detect motor position, and this strategy has attracted much attention. A challenge is that measurement model parameters vary with position and vary from motor to motor because of the machining errors of permanent magnets. While, most existing methods use other auxiliary displacement sensors to calibrate model parame... View full abstract»

This paper presents a non-contact inductive linear displacement sensor which is based on planar coils realized by the printed circuit board (PCB) technique. The sensor mainly consists of a ferromagnetic stator, a ferromag-netic mover, several excitation coil-PCBs, and a pickup coil-PCB. Excitation coil-PCBs are embedded in the mover and generate quadrature magnetic fields both in temporal- and spa... View full abstract»

Transmission cable has great influence upon the performance of the high-frequency ultrasound transducers, especially for those intrusive applications, where front-end tuning circuits are unavailable. In this paper, a method of modeling high-frequency ultrasound transducers by considering the cable effect was proposed based on the transmission line theory. A full examination of various cables effec... View full abstract»

The high-power handling capacity of a capacitive microelectromechanical systems (MEMS) power sensor is investigated in this paper. The power sensor is designed for a parallel-plate structure with clamped-clamped beam in ${X}$ -band (8–12 GHz) applications. The fabrication of this device adopts GaAs monolithic microwave ... View full abstract»

A series of high-performance quartz crystal microbalance humidity sensors were fabricated by using acidized-multiwalled carbon nanotubes (MWCNTs) as sensing film. The detection process is carried out in the static humidity generator at room temperature. The material characteristics of the thin films were analyzed by Raman spectra, X-ray photoelectron spectroscopy, FT-IR spectroscopy, and transmiss... View full abstract»

In this paper, a new affordable 2-pole resolver is proposed. Since, the commercial 2-pole resolvers are wound rotor (WR) types, at first the performance of a WR resolver is analyzed and shown that despite high accuracy of the sensor, it has a complex structure. The common solution for reducing the complexity of the WR resolvers is using variable reluctance (VR) resolvers. So, the performance of th... View full abstract»

Single-photon avalanche diodes (SPADs) have emerged as the primary solid-state photodetectors for use in time-resolved imaging and very low light optical detection for their high sensitivity, fast impulse response, and CMOS process compatibility. For each application, diode structure and size must be optimized empirically, where device performance is difficult to predict theoretically. To assist i... View full abstract»

This paper discusses radar-based technologies that provide drivers with information about road curves under conditions in which optical sensors are unable to perform. The development of a task capable of estimating road curves has become a popular challenge since the commencement of the active development of advanced driver assistance systems and autonomous vehicles. Although the hardware implemen... View full abstract»

Amphiphilic block copolymers containing poly [N,N-(dimethylamino)ethyl methacrylate] block was used as a chemical sensor material in this paper. The amphiphilic block copolymer Langmuir–Blodgett (LB) thin films were prepared onto a gold-coated glass, quartz crystal and quartz glass substrates to fabricate a thin film chemical sensor element. Atomic force microscopy, quartz crystal microbala... View full abstract»

This paper presents a tunable passband low-power logarithmic photodetector for IoT smart dusts using optical wireless communications. The photodetector can selectively receive optical signals and filter out unwanted optical noise. All the transistors work in the subthreshold region. Each transistor and circuit pole is designed based on theoretical analysis. The output of the photodetector is indep... View full abstract»

Surface plasmon resonance sensor with phase and angular interrogations is proposed in this paper to achieve high sensitivity in a wide dynamic range. The phase interrogation is achieved by Michelson interferometer and the angular interrogation is achieved by rotator. The sensitivity of $7.2times 10^{-7}$ RIU/0.1° (refr... View full abstract»

Vehicle-to-vehicle (V2V) distance measurement is at the heart of the trajectory control performed by the vehicles forming an automated platoon. Although several technologies like radar or lidar are already used with great benefits in such applications, they suffer from interference issues justifying the need of redundant sensors. In this paper, a proof of concept of a visible light rangefinder bas... View full abstract»

In this paper, a multiplexing system for simultaneous interrogation of optical fiber sensors which measure different parameters is presented and validated. The whole system has been tested with six different sensing heads with different purposes: one temperature sensing head, two relative humidity sensors, and three VOCs leak sensors; all of them based on microstructured optical fibers. The interr... View full abstract»

An array of regenerated fiber Bragg gratings (RFBGs) was employed to monitor the temperature distribution during an aluminum cast process. Significant temperature gradients in the cast part were observed during the cooling and solidification period. The direction and velocity of the solidification front was revealed by the temperature data obtained by the RFBGs at different measurement points. A g... View full abstract»

We report the development of a temperature sensing probe created as a result of the combination of an optical fiber and a porous silicon microcavity (PSMC). After determining the physical parameters of the PSMC to achieve the required porous sensing structure, it was fabricated by electrochemically etching a silicon wafer. A 1-mm2 PSMC piece was attached to the tip of an optical fiber s... View full abstract»

Immunoassay is a biochemical test that measures the presence or concentration of biomolecule in a solution by the means of the antibody (or antigen). Most immunoassays involve chemically linking antibodies or antigens with some kind of detectable labels which produce measurable signals in response to the binding. The use of labels creates problems, including complexity in the screening process and... View full abstract»