Patent ID: 8442809

Claim:
A method of biological environment monitoring including: placing a test invertebrate with a hard outer covering in the environment under investigation; exposing the test invertebrate's heart area to optical radiation of IR spectral range; receiving and converting the optical radiation reflected by the test invertebrate's heart to an electrical signal; amplifying the electrical signal obtained; converting its instantaneous values to digital codes; entering the digital codes obtained to a computer; determining and memorizing with the help of the computer a preset-volume sample of values of the period of the electrical signal; determining with the help of the computer a statistical characteristic of the sample of values of the electrical signal period; comparing with the help of the computer the obtained statistical characteristic with the threshold value set for it; and forming an ecological danger signal on the basis of comparison results, differing in that the test invertebrate is exposed to optical radiation of IR spectral range with the help of a transmitting optical fibre with its output end placed on the test invertebrate's hard outer covering within its heart area and an optical radiation source mounted so that it can have optical contact with the input end of the transmitting optical fibre; the optical radiation reflected by the test invertebrate's heart is received by a receiving optical fibre with its input end located on the test invertebrate's hard outer covering within its heart area; the optical radiation reflected by the test invertebrate's heart is converted to an electrical signal with the help of the optical radiation receiver mounted so that can have optical contact with the output end of the receiving optical fibre; before determining a sample of values of the period of electrical signal, digital filtration of digital codes which is matched to the shape and frequency of the electrical signal is made by the computer; a sample dispersion is determined as a statistical characteristic for the sample of values of the electrical signal period, and an ecological danger signal is formed, should the threshold value exceed the obtained sample dispersion of values of the electrical signal period.