Sensors and Systems Journal, No. 6, June 2009 (Contents and Abstracts)

Anashin V. S. Sensors for on-board dose metering systems

The paper discusses the development problems of a cumulative dose sensor (CDS) which is a key element of the on-board segment of monitoring systems for space ionizing radiation. It justifies the choice of sensing element based on MIS dosimetry operation principle. Engineering requirements to on-board dose metering devices and to CDS design concepts and structure development are formulated. Priority areas in the field of on-board dose metering are specified.

Keywords: space ionizing radiation, monitoring system, on-board segment, cumulative dose sensors, sensing element.

Kalinina L. N., Litvinov A. V., Mikhailov A. A., Nikolaev I. N. MIS sensors for H2S content measurement in 0.005…10 ppm range

Static characteristics of MIS H2S sensors for 2…7 ppm range are examined. The paper shows that the sensors with Pd-SiO2-Si and Pd-Si3N4-Si structures provide sufficient resolution per H2S concentration and acceptable life time. It concludes about the possibility of applying such devices as sensing elements of gas analyzers for H2S content monitoring in working spaces against MPC.

Keywords: MIS sensor, H2S MPC in working space.

Chernikov S. P., Tsvetkov Yu. P., Brekhov O. M., et al. Computer model of balloon-borne magnetic gradiometer deployment dynamics

A computer model of deployment dynamics of a balloon-borne magnetic gradiometer with a big gage length is described. The estimates of strains in suspension ropes of cellular rope magazine are obtained. Possible disruptions of deployment process, their causes and the ways to eliminate are examined.

Keywords: stratospheric balloon, gradiometer, rope magazine, cable, stresses, computer model.

Akhremchik O. L. The models of measuring subsystems based on modern temperature sensors

Two graph types are chosen as basic structural components of a measuring subsystem employing modern temperature sensors. Model decomposition is carried out by means of additional graph coloring and ribs tagging.

Keywords: graph, sensor, model, structure.

Borodin S. G., Dreyzin V. E., Pikkiev V. A., Povetkin R. A. Modeling the dynamics of temperature stabilization system of a thermoelectric gage head

The paper presents the results of mathematical modeling of temperature stabilization system dynamics of a thermoresistive gage head for thermoelectric vacuum gauge with two switchable heating temperatures. The attainable speed of such vacuum gauge is evaluated for various measurement ranges.

Keywords: thermoelectric gage head, temperature stabilization system, mathematical model, transient.

Gladky P. V. PDM in ultrasonic medical scanners

The application features of unidirectional and bidirectional PDM for ultrasonic transmitters excitation in medical scanners are discussed.

Keywords: medical ultrasonic scanning, apodization, PDM, spectrum.

Denisenko V. V. Accuracy improvement by multiple measurements

The factors limiting accuracy improvement by averaging the results of multiple measurements are studied. Formulae and graphs helping to evaluate accuracy improvement limits for typical errors sources are presented.

Keywords: multiple measurements, averaging, accuracy, disturbances.

Sementsov S. G., Vlasov A. I. Finite capacity effect in digital processing systems

The implementation of digital signal processing algorithms with fixed and floating point is considered. The efficiency of floating point systems when processing real signals is shown. It is noted that the quantization of adaptive digital filter coefficients results in lower convergence rate and stability of adaptive algorithms.

Keywords: digital signal processing, digital filters, data formats, coefficients, round-up.

Ovchinnikov A. M., Roldughin D. S., Ovchinnikov M. Yu. Hard-/software system for spectral information processing

The principles of hyperspectral analysis for surface substances recognition in remote sensing are presented. Hyperspectrometer’s functional design and a mobile hyperspectral device built on its basis are described. A description of a recognition algorithm, its software realization and experimental results are included.

Keywords: hyperspectral analysis, correlation method, hyperspectrometer mock-up, software.

Gavrushko V. V., Ionov A. S., Lastkin V. A. Silicon photodetectors with high UV sensitivity

The effect of substrate doping level on the form of spectral response of a silicon photodetector made by ion implantation technique is investigated. The effect of substrate doping degree on the sensitivity in the long-wave spectral region is established. The diffusion length of electrons is evaluated which equals 27 μm in KDB-10 substrate, and 6.8 μm in the KDB-0,1 one.

Keywords: photodetector, silicon, sensitivity spectrum, UV radiation, diffusion length.

Ignatieva E. V., Mikhailov Yu. A., Pankov V. V. The influence of membrane design on the output characteristic of silicon pressure strain transducer

The paper demonstrates that a membrane with distributed solid center provides a considerable increase of sensitivity factor with simultaneous decrease of nonlinearity and a thermal hysteresis of output characteristic of IPD 5.2 chip. The decrease of rated pressure from 10 till 2.5 kPa is attained.

Keywords: silicon strain pressure transducer, membrane with distributed solid center, metrological performance.

Melekaev M. A. Precision deviation sensing heads

A novel deviation sensing head for monitoring the geometrics of compound component parts is presented. The device is based on extremal raster system using small elastic deformations and demonstrates unparalleled precision.

Keywords: deviation sensing heads, geometrics, pointing error, photoelectric transducers.

Kasimov F. D., Javadov N. H., Ibraghimov R. A., Svikhnushin N. M. A system for automatic recording of meteorological parameters

The paper describes a system for automatic recording of airport weather parameters and discusses its components. Key performance data are presented.

Keywords: sensor, system, automatic recording, wind speed, magnetosensitive chip, Hall sensor, microcontroller.

Pelevina E. N. Pointing control system for special weapon of a mobile robot

A pointing control system for special weapon (hydro destroyer) of a mobile robot intended for explosive devices neutralization  is described.

Keywords: explosive devices neutralization, hydro destroyer, control system, pointing drive, magnetoresistive sensor, encoder.

Fomin P. M., Yannikov I. M., Morozov P. A., Abakumov I. I. New approaches to developing inhabitants warning system

An opportunity of creating various warning systems based on the same equipment is examined. The systems include the tools for early voice warning and population informing.

Keywords: emergency, voice population informing, broadcasting station.

Tikhostup E. A. Recommendations on conventional pressure gages replacement with Russian Metran-150 pressure sensor

Comparative performance data of Metran-150 pressure sensor and its advantages as against conventional sensors are presented.

Keywords: pressure sensor, metrological performance stability, perfect design.

Mokeev A. V. ENIP-2 digital measuring transducers

ENIP Series multipurpose digital measuring transducers for teleautomatics developed in Energoservice Engineering Centre are described.

Keywords: electricity accounting, telemetry, measuring transducers, interface.

Level metering, monitoring and control in housing and communal services and heat-power engineering

Destination, functional and design features of level meters manufactured by Staroruspribor Works  JSC (Staraya Russa, Russia) are described.

Keywords: ultrasonic level meters, capacitance level meters, optimum alternative.

 Dozortsev V. M. Computerized training of process operators: 10 “myths” …and 5 more

The paper analyzes 15 common statements about the capabilities of computerized training simulators for process operators and examines their real practical value for training. It shows the groundlessness of some requirements to training systems and offers realistic ways to success based on conventional training tools.

Keywords: process, simulation models, computerized operator training.