A system for automatically disarming an intrusion detection system protecting a premises and having at least an armed state of operation and a disarmed state of operation, the system for automatically disarming the intrusion detection system including an intrusion detection system state of operation ascertainer operable for receiving an indication of activation of an armed state of operation of the intrusion detection system; and a registered mobile communicator proximity detector communicating with the intrusion detection system state of operation ascertainer and operable, responsive to receiving the indication of activation of the armed state of operation by the intrusion detection system state of operation ascertainer for ascertaining at least a subset of a multiplicity of registered mobile communicators which are located in a vicinity of the premises during an activation time of the armed state of operation and for deactivating the subset of the multiplicity of registered mobile communicators.

A method for monitoring a passenger compartment of a vehicle. The passenger compartment has at least one RFID transponder. A readout signal for reading out the RFID transponder is emitted in the method. In response to the emitting, a response signal of the RFID transponder is measured in order to obtain a measured value. Using the measured value, a degree of obscuration that represents an obscuration of the RFID transponder is ascertained in order to monitor the passenger compartment.

A system for automatically disarming an intrusion detection system, the intrusion detection system protecting a premises and having an armed state and a disarmed state of operation, including an intrusion detection system state of operation ascertainer operable, responsive to receiving an indication of detection of an intrusion, for ascertaining whether the intrusion detection system is in the armed state; a registered mobile communicator proximity detector communicating with the intrusion detection system state of operation ascertainer and operable, responsive to ascertaining that the intrusion detection system is in the armed state of operation, for ascertaining whether at least registered mobile communicator is in a vicinity of the premises; and an automatic intrusion detection system disarmer communicating with the registered mobile communicator proximity detector and operable, responsive to the ascertaining that at least one registered mobile communicator is in the vicinity of the premises, for automatically disarming the intrusion detection system.

A system for automatically disarming an intrusion detection system, the intrusion detection system protecting a premises and having an armed state and a disarmed state of operation, including an intrusion detection system state of operation ascertainer operable, responsive to receiving an indication of detection of an intrusion, for ascertaining whether the intrusion detection system is in the armed state; a registered mobile communicator proximity detector communicating with the intrusion detection system state of operation ascertainer and operable, responsive to ascertaining that the intrusion detection system is in the armed state of operation, for ascertaining whether at least registered mobile communicator is in a vicinity of the premises; and an automatic intrusion detection system disarmer communicating with the registered mobile communicator proximity detector and operable, responsive to the ascertaining that at least one registered mobile communicator is in the vicinity of the premises, for automatically disarming the intrusion detection system.

A microcontroller uses a combination of several synchronized PWM outputs to generate a low distortion sine wave by summing the PWM outputs and filtering the summed signal. The sine wave is used as a guard voltage. The unknown impedance is measured by impinging the guard voltage on the sense electrode by a transistor connected in common base configuration and then transferring the sense current through the common base connected transistor to a transimpedance amplifier made out of a second transistor connected in common emitter configuration. The output voltage at the collector of the second transistor is measured by an ADC input of the microcontroller. The microcontroller translates the ADC output values into the unknown impedance to be measured by doing a software demodulation of the ADC output values. A reference impedance can be connected in parallel to the unknown impeder to eliminate gain errors of the signal sensing circuit.

A method for detection of proximity between an object and an implement in a table saw includes operating a motor in the table saw to move the implement, generating, with a capacitive sensor formed in a throat plate around the implement in the table saw, a capacitance signal during operation of the motor, identifying, with a controller operatively connected to the capacitive sensor, an object in proximity to the capacitive sensor in response to a change in a level of capacitance in the capacitance signal, and deactivating, with the controller, the motor in the table saw in response to the change in the capacitance signal indicating a capacitance level that exceeds a predetermined threshold corresponding to a body part of an operator.

A method for detection of proximity between an object and an implement in a table saw includes operating a motor in the table saw to move the implement, generating, with a capacitive sensor formed in a throat plate around the implement in the table saw, a capacitance signal during operation of the motor, identifying, with a controller operatively connected to the capacitive sensor, an object in proximity to the capacitive sensor in response to a change in a level of capacitance in the capacitance signal, and deactivating, with the controller, the motor in the table saw in response to the change in the capacitance signal indicating a capacitance level that exceeds a predetermined threshold corresponding to a body part of an operator.

The system is constituted by physical and electrical barriers, with components of sensing and alarm of the first and of connection and activation of the last, all connected to the internal source constituted by set of batteries or conventional electrical system, the last one provided of batteries pack, for coverage of eventual electrical supply failures, for the length of time considered more convenient by the user. The system prevents access to closed or semi-closed enclosures, so that the detection by the sensing and alarm component of the simple approach of intrusion agent at a distance below that established activates the electrical barrier connection and activation component fed by its own sources or conventional, substitutable by the own sources in case of external supply drop, making the entire energized electric barrier practically impregnable to burglary, due to the discharge of high voltage and low amperage, as appropriate.

Pest control systems and methods are described. The systems comprise a portable electronic device which is configured to identify one or more of multiple PCDs within a range of a portable electric device which have been activated, and to provide an indication to a user corresponding to at least one of the identified activated PCDs.

Pest control systems and methods are described. The systems comprise a portable electronic device which is configured to identify one or more of multiple PCDs within a range of a portable electric device which have been activated, and to provide an indication to a user corresponding to at least one of the identified activated PCDs.