Sensor instrument system including method for detecting analytes in fluids

Abstract

A sensor instrument system and a method for detecting and identifying analytes in fluids of a region comprising a local sensor instrument and remote central station are disclosed. The instrument is composed of a core technology employing a single sensor having two electrodes operated by an electrical frequency sweeping to generate two sets of patterned electrical information from a single measurement. The instrument further includes a data transmission module and a GPS receiver module. The central station is connectd with a plurality of local information sites which can wirelessly transmit and receive information in different areas in the region, so that information transmitted by the sensor instrument can be received by the central station through the local sites. The core technology further comprises a reference sensor for eliminating background influence, a temperature programming to control adsorption and desorption of analytes, and usage of all kinds of adsorbent materials having chemical selectivity including the hydrogen selectivity to enhance detection and identification of analytes in fluids.

Description

field of invention [0001] The invention relates to the field of sensor instruments, in particular to sensor instrument systems and methods for detecting analytes in fluids. Background technique [0002] Sensor instruments are widely used to detect analytes in fluids. The following are references related to the technology of the present invention. [0003] 1. U.S. Patent No. 4,887,455 entitled "Gas Sensor" granted to Payne et al. on December 9, 1989 (hereinafter referred to as Payne's '455 patent); [0004] 2. U.S. Patent No. 5,571,401 granted to Lewis on November 5, 1996, et al., entitled "Sensor Group for Detecting Analytes in Fluids" (hereinafter Lewis' 571 patent); [0005] 3. US Patent No. 6,319,724 was granted to Lewis et al. on November 20, 2001, entitled "Detection of Trace Analytes Using Artificial Olfactory Instruments" (the following is Lewis' 724 patent); [0006] 4. The literature by Pena et al. is entitled "Frequency Measurement of Conductive Polymer Material...

AI Technical Summary

Problems solved by technology

Although sensor research along this scheme has made great strides in the past, it still has the disadvantages of using multi-sensor schemes

These disadvantages include: a large number of sensors are required to generate the type-differentiated information map of the analyte; the complex structure of the sensor leads to inconsistency in the production of the sensor; Humidity interference; slow sensitivity; necessary expensive instruments and severely restricted operating conditions

Second, the polymer film material has an aging effect, which affects the long-term stability of the sensor

Third, it is also a difficult problem to obtain the repeatability of the polymer material film placed on the sensor in production

However, the electric resonance phenomenon of Pena's device must be in the frequency range of 100 megacycles to 500 megacycles to be possible

This high frequency limitation brings great difficulties to the production and use of the instrument

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