Segmentation of an object space by binary radiation sensors and geometric reference structures is studied in this paper. Given a family of binary radiation sensors and a geometric reference structure, we refer to the set of sensor states induced by a source at point as the signature of . We study the segmentation of an object space into signature cells and prove near-optimal bounds on the numbe...

A new type of highly-directional ultrasonic range sensor is designed, fabricated, and tested in this paper. To improve directivity, the parametric acoustic array, a nonlinear effect of media between two intensive waves, is applied to an ultrasonic range sensor. Additionally, a new type of the stepped-plate transducer is applied for generating high amplitude waves consisting of two frequencies. ...

The signal processing circuit of shunt type current sensor is directly coupled with the high voltage electric circuit so that the common-mode interference signal conditioning becomes a problem. This paper proposes a high-voltage isolation current sensor employs modulation and demodulation which is based on shunt output signal. There is an electrical isolation is set between the high voltage and...

A sensor network makes environments smarter by sensing small changes of physical quantities using heterogeneous networked sensors, such as small sensor nodes and fixed type sensors. This paper illustrates our experimental setting developed in an ordinary office using prototype sensor nodes and reports how a sensor network detects small changes in a smart environment.

This paper describes a fiber-optic temperature sensor that uses a spectrum-modulating Sic etalon. The spectral output of this type of sensor may be analyzed to obtain a tem.+ perature measurement which is largely independent of the transmission properties of the m sensor's fiber-optic link. A highly precise laboratory-type spectrometer is described in detail, and this instrument is used to stud...

The E-type membrane which is used for measuring forces in other five directions will generate coupling outputs and influence accuracy of the sensor, when six-axis force sensor based on double layer E-type membrane is under dynamic loads in MZ direction. In terms of the fundamental theory of mechanical vibration, vibration mechanics and elastic mechanics, this paper simplifies the E-type membran...

Load sensor is developed using mamdani type fuzzy model. It is two input one output model. Inputs taken for the load sensor are load and displacement and voltage is taken as output. The model is simulated using MATLAB Fuzzy Logic Toolbox and simulation results are shown in this paper. Index Terms —Fiber Bragg Grating sensor, Fuzzy logic, Load sensor, Mamdani, Windmill blades.

Compare with traditional way of numerical simulation by establishing the mathematical model through geometry optic, we design a TracePro model to analyze the sensing process of reflective intensitymodulated fiber optic sensor base on ray tracing. This type of sensor has advantages over other fiber optic sensor, including simple structure, flexible design, reliable perform, low cost etc. In this...

In the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested successfully. All of these sensor devicesshowed improved sensor functionality in comparison to conv...