System for preventing tampering with a signal conditioner remote from a host system
First Claim
1. A system for detecting tampering in a signal conditioner of electronics that determines a parameter from signals received from one or more sensors, said system comprising:
- a host system that receives said parameter signals from said signal conditioner indicating properties of a material and supplies power to said signal conditioner; and
said signal conditioner is remote from and coupled to said host system, wherein said signal conditioner generates said parameter signals;
with said host system being configured to transmit an initialize request to said signal conditioner, requesting said authentication information in response to detecting said signal conditioner being connected to said host system, receive said authentication information from said signal conditioner, and store said authentication information as said initial authentication information;
with said host system being configured to periodically transmit a request for authentication information to said signal conditioner, receive said authentication information from said signal conditioner in response to said request, compare said authentication information with initial authentication information, and detect said tampering condition in said signal conditioner if said authentication information is not equal to said initial authentication information, with the authentication information comprising information that can change but is not authorized to be changed except by a signal conditioner manufacturer or agents thereof.
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Abstract
A system for detecting tampering in a signal conditioner of electronics that determines a parameter from signals received from one or more sensors is provided. The system includes a host system that receives the parameter signals from the signal conditioner indicating properties of a material and supplies power to the signal conditioner. The signal conditioner is remote from and coupled to said host system. The signal conditioner generates the parameter signals. The host system is configured to periodically transmit a request for said authentication information to said signal conditioner, receive said authentication information from said signal conditioner in response to said request, compare said authentication information with initial authentication information, and detect said tampering condition in said signal conditioner if said authentication information is not equal to said initial authentication information.
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Citations
21 Claims
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1. A system for detecting tampering in a signal conditioner of electronics that determines a parameter from signals received from one or more sensors, said system comprising:
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a host system that receives said parameter signals from said signal conditioner indicating properties of a material and supplies power to said signal conditioner; and said signal conditioner is remote from and coupled to said host system, wherein said signal conditioner generates said parameter signals; with said host system being configured to transmit an initialize request to said signal conditioner, requesting said authentication information in response to detecting said signal conditioner being connected to said host system, receive said authentication information from said signal conditioner, and store said authentication information as said initial authentication information; with said host system being configured to periodically transmit a request for authentication information to said signal conditioner, receive said authentication information from said signal conditioner in response to said request, compare said authentication information with initial authentication information, and detect said tampering condition in said signal conditioner if said authentication information is not equal to said initial authentication information, with the authentication information comprising information that can change but is not authorized to be changed except by a signal conditioner manufacturer or agents thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vibratory flowmeter configured to detect tampering, the vibratory flowmeter comprising:
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a vibratory flow meter assembly configured to generate one or more sensor signals related to a material in said vibratory flow meter assembly; a host system that receives parameter signals from a signal conditioner indicating properties of a material in said vibratory flowmeter and supplies power to said signal conditioner; and said signal conditioner is remote from and coupled to said host system and is coupled to said vibratory flow meter assembly, wherein said signal conditioner receives said one or more sensor signals from said vibratory flow meter assembly and generates said parameter signals that indicate at least one property of said material; with said host system being configured to transmit an initialize request to said signal conditioner, requesting said authentication information in response to detecting said signal conditioner being connected to said host system, receive said authentication information from said signal conditioner, and store said authentication information as said initial authentication information; with the host system being configured to periodically transmit a request for authentication information to said signal conditioner, receive said authentication information from said signal conditioner in response to said request, compare said authentication information with initial authentication information, and detect said tampering condition in said signal conditioner if said authentication information is not equal to said initial authentication information, with the authentication information comprising information that can change but is not authorized to be changed except by a signal conditioner manufacturer or agents thereof. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for detecting tampering in a signal conditioner of a system, comprising:
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transmitting an initialize request from a host system to said signal conditioner, requesting said authentication information in response to detecting said signal conditioner being connected to said host system; receiving said authentication information from said signal conditioner and storing said authentication information in said host system as said initial authentication information; periodically transmitting a request for authentication information from the host system to said signal conditioner, with the authentication information including calibration and configuration information of the signal conditioner and with the authentication information comprising information that can change but is not authorized to be changed except by a signal conditioner manufacturer or agents thereof; receiving said authentication information from said signal conditioner in response to said request; comparing said authentication information with initial information; and signaling a tampering condition in the signal conditioner in response to said authentication information not being equal to said initial information. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification