Monitoring method
First Claim
1. A method of monitoring for a selected gas from a potential source of the selected gas, said method comprising the steps of providing a plurality of gas monitor stations at locations spaced from the potential source of the selected gas and from a master station, said step of providing a plurality of gas monitor stations includes providing a computer connected with a radio and a sensor at each of the gas monitor stations, transmitting data relating to the selected gas from a radio at the master station to the radios at each of the gas monitor stations, storing the data transmitted from the master station and relating to the selected gas in the computers at each of the gas monitor stations, sensing atmosphere adjacent to each of the gas monitor stations, and transmitting a signal from the radio at any one of the gas monitor stations to the radio at the master station in response to sensing of a concentration of the selected gas which is a function of the data transmitted from the master station to the one gas monitor station.
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Accused Products
Abstract
A monitoring system includes a master station and a plurality of monitor stations which are spaced from the master station. Each of the monitor stations includes a programmable computer which is connected with a radio and a sensor. The computer and radio may be enclosed in an explosion-proof housing. To change a program in the computer at a monitor station, the program change may be transmitted from the master station to the monitor station. In addition, data relating to a condition to be sensed may be transmitted from the master station to the monitor station.
33 Citations
58 Claims
- 1. A method of monitoring for a selected gas from a potential source of the selected gas, said method comprising the steps of providing a plurality of gas monitor stations at locations spaced from the potential source of the selected gas and from a master station, said step of providing a plurality of gas monitor stations includes providing a computer connected with a radio and a sensor at each of the gas monitor stations, transmitting data relating to the selected gas from a radio at the master station to the radios at each of the gas monitor stations, storing the data transmitted from the master station and relating to the selected gas in the computers at each of the gas monitor stations, sensing atmosphere adjacent to each of the gas monitor stations, and transmitting a signal from the radio at any one of the gas monitor stations to the radio at the master station in response to sensing of a concentration of the selected gas which is a function of the data transmitted from the master station to the one gas monitor station.
- 11. A method of monitoring for a selected gas from a potential source of the selected gas, said method comprising the steps of providing a plurality of gas monitor stations at locations spaced from the potential source of the selected gas and from a master station, said step of providing a plurality of gas monitor stations includes providing a computer connected with a radio and a sensor at each of the gas monitor stations and enclosing at least the computer and radio at each of the gas monitor stations with an explosion-proof housing which is sealed against entry of gas from atmosphere adjacent to each of the gas monitor stations, entering data relating to the selected gas into the computer at each of the gas monitor stations by transmitting data from a location outside of the explosion-proof housing at each of the gas monitor stations to the computer in the explosion-proof housing, sensing atmosphere outside of the explosion-proof housing at each of the gas monitor stations while the explosion-proof housing at each of the gas monitor stations is sealed against entry of gas from the atmosphere adjacent to each of the gas monitor stations, and transmitting a radio signal from the radio in the sealed explosion-proof housing at any one of the gas monitor stations to a master station in response to sensing of the selected gas in conditions which are a function of the data entered into the computers at the gas monitor stations.
- 22. A method of monitoring for a selected gas in an environment which may contain ignitable concentrations of flammable gas, said method comprises installing a gas monitor assembly in the environment which may contain ignitable concentrations of flammable gas, said step of installing a gas monitor assembly includes preventing ignition of any flammable gases around the gas monitor assembly by a spark within a housing for at least a portion of the gas monitor assembly by sealing the housing against entry of gas from around the gas monitor assembly, entering data into the gas monitor assembly by transmitting data from a location outside the housing to the portion of the gas monitor assembly in the housing, said step of entering data into the portion of the gas monitor assembly in the housing includes entering data relating to a predetermined concentration of a selected gas, thereafter, sensing the atmosphere outside the housing, initiating transmission with the radio in the housing when the sensed concentration of the selected gas in the atmosphere adjacent to the gas monitor assembly is at least as great as the predetermined concentration of the selected gas, and transmitting data corresponding to the sensed concentration of the selected gas from the radio in the housing to a master station while maintaining the housing in a sealed condition to prevent ignition of flammable gas around the gas monitor assembly by a spark within the housing during transmission of data from the radio in the housing.
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29. A method of monitoring a selected operating condition, said method comprising the steps of providing a plurality of monitor stations at spaced apart locations, said step of providing a plurality of monitor stations includes providing a programmable computer connected with a radio and a sensor at each of the monitor stations, transmitting a computer program change from a master station radio to the radio in at least one of the monitor stations, changing a program in the computer in at least one of the monitor stations in accordance with the computer program change transmitted by radio from the master station, sensing conditions with the sensors at the monitor stations, operating a computer at each of the monitor stations in accordance with a program in the computer at each of the monitor stations, and transmitting a radio signal from at least one of the monitor stations to the master station in response to sensing of a predetermined condition.
- 40. A method of monitoring for a selected gas from a potential source of the selected gas, said method comprising the steps of providing a plurality of gas monitor stations at locations spaced from the potential source of the selected gas and from a master station, said step of providing a plurality of gas monitor stations includes providing a programmable computer connected with a radio and a sensor at each of the gas monitor stations, transmitting a computer program change from a radio in the master station to the radio in at least a first gas monitor station, changing a program in the computer in at least the first gas monitor station in accordance with the computer program change transmitted by radio from the master station, transmitting data relating to the selected gas from the radio in the master station to the radio in at least the first gas monitor station, storing the data relating to the selected gas transmitted to the radio in the first gas monitor station in the computer in the first gas monitor station, sensing atmosphere adjacent to the first gas monitor station, operating the computer in the first gas monitor station in accordance with the program change transmitted from the master station, transmitting a radio signal from the first gas monitor station to the master station when operation of the computer in the first gas monitor station indicates that a sensed concentration of the selected gas in the atmosphere adjacent to the first gas monitor station is in accordance with a function of the data stored in the computer in the first gas monitor station.
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48. A method of monitoring a selected operating condition, said method comprising the steps of providing a plurality of monitor stations at locations which are spaced from a master station, said step of providing a plurality of monitor stations includes providing a computer connected with a radio and a sensor at each of the monitor stations, transmitting data from a radio at the master station to each of the monitor stations, storing the data transmitted to the radios at each of the monitor stations in the computers at each of the monitor stations, sensing conditions with the sensors at each of the monitor stations, and transmitting a radio signal from the radio at any one of the monitor stations to the radio at the master station in response to sensing of a condition which is a function of the data stored in the computer at the one monitor station.
- 55. A method of monitoring for a selected gas, said method comprising the steps of positioning a plurality of portable gas monitor stations at a plurality of locations spaced from a master station, said step of positioning a plurality of portable gas monitor stations includes positioning portable gas monitor stations having a global positioning system receiver, a gas sensor, and a radio at each of the locations, processing satellite signals received by the global positioning system receivers at each of the gas monitor stations to determine the location of each of the gas monitor stations, transmitting a signal indicative of a position of each portable gas monitor station from a radio at each portable gas monitor station to the master station, sensing atmosphere adjacent to each of the portable gas monitor stations, and transmitting a signal from the radio at any one of the portable gas monitor stations to the radio at the master station in response to sensing of a predetermined concentration of the selected gas.
Specification