Electronic access 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 signal;
the portion of the circuit being enabled for an extended time period that is greater than the second time period;
the portion of the circuit having an input code output generated in response to the signal and during the extended time period;
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.
2 Assignments
0 Petitions
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
76 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 signal;
the portion of the circuit being enabled for an extended time period that is greater than the second time period;
the portion of the circuit having an input code output generated in response to the signal and during the extended time period;
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, 64, 65)
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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 a signal;
a third circuit temporarily 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 the signal;
a fourth circuit temporarily 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, 18, 66, 67)
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19. 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 a signal;
a microprocessor that compares the input code to an authorization code;
a switch that enables the portion of the circuit as the input code is being received for a time t3 that is greater than the time t1. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 68, 69)
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30. A circuit operating on current drained from a battery comprising:
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an electronic circuit having an output that indicates detection of a device capable of providing an electromagnetic signal;
a decoder that extracts an input code transmitted via the electromagnetic signal;
a switch that, in response to an input, increases the current drained from the battery;
an electronic circuit that compares the input code to an authorization code;
an electronic circuit that provides an output to a device if the input code matches the authorization code; and
,wherein the switch decreases the current drained from the battery after receiving the input code. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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38. 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 a signal during the second time period;
enabling the circuit for an extended time period that is greater than the second time period upon the sensing of the signal;
processing the signal during the extended time period 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 (39, 40, 41, 42, 43, 44, 45, 46, 70, 71)
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47. 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 a signal;
comparing the input code to an authorization code;
enabling the circuit as the input code is being received for a time t2 that is greater than said time t1; and
,providing a signal to a device if the input code matches the authorization code. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 72, 73)
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56. A method for operating a circuit on current drained from a battery comprising the steps of:
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generating a signal to indicate detection of a device capable of providing a signal;
receiving an input code transmitted by the signal;
increasing the current drained from the battery;
comparing the input code to an authorization code;
providing an output to a device if the input code matches the authorization code; and
,decreasing the current drained from the battery after receiving the input code. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63)
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74. 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 a signal during the second time period;
processing the 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 (75, 76)
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Specification