Electronic device for monitoring the temperature of a medium to be monitored and method for implementing the same
First Claim
1. A passive electronic device for monitoring the temperature of a medium to be monitored enabling one to make sure that the temperature has not reached at least a pre-established index limit value, wherein it includes:
- electrically conductive contact means able to close an electric charge flow circuit when said temperature reaches the or one of the index limit values;
electric charge storage means able to be connected to the charge flow circuit when the contact means close, the charges stored in these storage means being kept as long as the temperature does not reach its or one of its index limit values, and being able to flow through said charge flow circuit when the circuit is closed by said contact means, said storage means not returning to the charge state which they had before the charge flow circuit closed if the latter opens again, and read means enabling the charge state of said storage means to be determined.
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Accused Products
Abstract
Electronic device for monitoring the temperature of a medium ensures that the temperature has not reached pre-established index limit values. The device includes contacts for closing an electric charge flow circuit when the temperature reaches an index limit value, an electric charge storage component connected to the charge flow circuit when the contacts close, the charges remain stored as long as the temperature does not reach one of its index limit values, and is able to flow through the charge flow circuit when the circuit is closed by the contacts, the charge storage not returning to the charge state which they had before the charge flow circuit closed if the latter opens again, and a provision for reading enabling the charge state to be determined.
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Citations
30 Claims
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1. A passive electronic device for monitoring the temperature of a medium to be monitored enabling one to make sure that the temperature has not reached at least a pre-established index limit value, wherein it includes:
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electrically conductive contact means able to close an electric charge flow circuit when said temperature reaches the or one of the index limit values;
electric charge storage means able to be connected to the charge flow circuit when the contact means close, the charges stored in these storage means being kept as long as the temperature does not reach its or one of its index limit values, and being able to flow through said charge flow circuit when the circuit is closed by said contact means, said storage means not returning to the charge state which they had before the charge flow circuit closed if the latter opens again, and read means enabling the charge state of said storage means to be determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for implementing an electronic device for monitoring the temperature of a medium to be monitored enabling one to make sure that the temperature has not reached at least a pre-established index limit value, this electronic device including:
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electrically conductive contact means able to close an electric charge flow circuit when said temperature reaches the or one of the index limit values;
electric charge storage means able to be connected to the charge flow circuit when the contact means close, the charges stored in these storage means being kept as long as the temperature does not reach its or one of its index limit values, and being able to flow through said charge flow circuit when the circuit is closed by said contact means, said storage means not returning to the charge state which they had before the charge flow circuit closed if the latter opens again, and read means enabling the charge state of said storage means to be determined, the method comprising the steps of;
writing data by injecting electric charges into the charge storage means;
placing the electronic device in the medium whose temperature evolution one wishes to monitor in order to ensure that this temperature has not reached at least one pre-established index limit value;
reading, in a non destructive manner, while the device is still in the medium to be monitored, the data written in the charge storage means, so as to determine whether or not the temperature of said medium to be monitored has, at a given moment, reached its or one of its pre-established index limit values, knowing that if the temperature has not reached its or one of its index limit values, the contact means are not closed and the charge state of the charge storage means has remained unchanged, whereas if the temperature has reached its or one of its index limit values, the contact means have closed and the charge state of the charge storage means has been modified, this modified charge state of the charge storage means being preserved even if the temperature of the medium being monitored again passes below or beyond the index value which it has reached and the contact means open again;
continuing or stopping temperature monitoring and, if necessary, reprogramming the electronic temperature monitoring device in order to use it again. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification