Electronic acces control device
First Claim
1. An electronic control device comprising:
- a circuit having a portion deactivated during a first time period;
the portion of the circuit enabled during a second time period, the portion of the circuit having an enable output signal generated in response to a sensed electromagnetic signal;
the portion of the circuit having an input code output generated in response to the electromagnetic signal;
a microprocessor having an output signal generated if the input code matches an authorization code; and
, a driver having an output generated in response to the output signal generated by the microprocessor.
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Accused Products
Abstract
An electronic lock utilizes two microprocessors remote from each other for enhanced security. The first microprocessor is disposed close to an input device such as a keypad, and the second microprocessor is disposed close to the lock mechanism and well protected from external access. The first microprocessor transmits a communication code to the second microprocessor when it receives via the input device an access code that matches a preset access code. The second microprocessor opens the lock if the transmitted communication code matches a preset communication code. The dual-microprocessor arrangement is advantageously used in a voice controlled access control system and in a motorcycle ignition control system. The present invention further provides an electronic access control system which has a master electronic key having a preset number of access, and an electronic alarm system for a bicycle that has a remote control mounted in the helmet of the rider.
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Citations
41 Claims
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1. An electronic control device comprising:
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a circuit having a portion deactivated during a first time period;
the portion of the circuit enabled during a second time period, the portion of the circuit having an enable output signal generated in response to a sensed electromagnetic signal;
the portion of the circuit having an input code output generated in response to the electromagnetic signal;
a microprocessor having an output signal generated if the input code matches an authorization code; and
,a driver having an output generated in response to the output signal generated by the microprocessor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a first circuit comprising an oscillator and having a first circuit output signal;
a second circuit enabled and disabled in response to the first circuit output signal, the second circuit having a second circuit output signal generated in response to receipt of an electromagnetic signal;
a third circuit enabled during the receipt of the electromagnetic signal, the circuit having a third circuit output signal comprising an input code generated in response to receipt of an electromagnetic signal;
a fourth circuit enabled to compare the input code to an authorization code; and
,a driver having an output that is provided to a device if the input code matches the authorization code. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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an oscillator having an output comprising a plurality of duty cycles;
a circuit that is periodically enabled for a time t1 and disabled for a time t2 during at least some of the duty cycles;
a portion of the circuit that generates an input code in response to an electromagnetic signal;
a microprocessor that compares the input code to an authorization code;
a device responsive to a signal generated by the microprocessor, the device comprising at least one of the following;
a solenoid;
an electromechanical relay;
a DC motor;
a solid-state relay; and
, an alarm. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A method comprising the steps of:
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deactivating a circuit during a first time period;
enabling a portion of the circuit for a second time period;
sensing an electromagnetic signal during the second time period;
processing the electromagnetic signal to obtain an input code;
comparing the input code to an authorization code; and
,providing a signal to a device if the input code matches the authorization code. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method comprising the steps of:
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periodically enabling and disabling a circuit during each of a plurality of duty cycles wherein the circuit is enabled for a time t1 during each of the duty cycles;
receiving an input code transmitted via an electromagnetic signal;
comparing the input code to an authorization code;
enabling the circuit as the input code is being received for a time t2; and
,providing a signal to a device if the input code matches the authorization code. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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Specification