Abstract: An air treatment system, such as a germicidal ultraviolet air treatment fixture, for use in vehicles. The air treatment system may include an airflow detection circuit for selectively energizing an ultraviolet light source based on detection of air movement. The air treatment system may also include a Photo Catalytic Oxidation (PCO) process. The ultraviolent light source and/or a photo catalyst may be installed in, for example, HVAC ducting, etc.

Abstract: A data acquisition system is provided that in one example comprises a sensor electrically coupled to a data acquisition unit via a signal splitter. In use, the sensor senses one or more signals transmitted over a “live” power cable carrying, for example, 50 Hz or 60 Hz, medium voltage power. The one or more signals are then transmitted to the data acquisition unit to be stored, displayed, and/or analyzed. The data acquisition system includes a synchronizer that allows the data acquisition unit to synchronize the storage of the sensed signals to the frequency of the power transmitted over the tested power cable or system. In one embodiment, the synchronizer provides an accurate phase angle reference or trigger signal for accurate phase resolved data acquisition and testing.

Abstract: Methods of testing at least a transmission line of interest within a group of transmission lines for anomalies using Time Domain Reflectometry are provided. The testing methods set forth herein aim to improve, for example, the quality and accuracy of information collected when propagating signals along a length of transmission line in order to pinpoint specific anomalies. To achieve this and other benefits, the testing methods simultaneously impose, for example, pulses of equal magnitude and form onto a group of transmission lines, such as the phases cables of a three phase power transmission cable system. From this, at least one transmission line from the group is monitored for reflected signals caused by impedance change. An example TDR is also provided.

Abstract: A capacitor component is adapted for capacitive coupling to an electrical power apparatus in which a PD is suspected, such as a shielded power cable; and an impedance transformance device has an input side connected directly to the capacitor component. Together the two components are used as a sensor to pick up and convey PD signals to a PD signal-analyzing system. Although the two components inherently form a classic high-pass RC filter, in accordance with the invention the input impedance at the capacitor side is much greater than the output impedance at the signal-analyzing system side. The effect is to pass much more of the lower frequency components of the PD signal for analysis by the PD signal-analyzing system than if the tranformance device were not included.

Abstract: A number of TDR systems and testing methods are provided that improve the quality and accuracy of information collected when propagating a signal along a length of cable in order to pinpoint specific anomalies. One or more of the TDR systems includes, for example, a computing device, a pulse generator, and at least one capacitive test sensor. The at least one capacitive test sensor transmits/receives pulses to/from a power system component, such as an insulated power cable, in a capacitive manner.

Abstract: A number of TDR systems and testing methods are provided that improve the quality and accuracy of information collected when propagating a signal along a length of cable in order to pinpoint specific anomalies. One or more of the TDR systems includes, for example, a computing device, a pulse generator, and at least one capacitive test sensor. The at least one capacitive test sensor transmits/receives pulses to/from a power system component, such as an insulated power cable, in a capacitive manner.

Abstract: Data acquisition systems and methods for acquiring test data associated with standard insulated power cables and/or power equipment such as switchgears, transformers, electric motors, etc are disclosed. The test data may then be subsequently analyzed for defects, such as the presence of faults, discharges (e.g., PD, coronas, arcing, etc.). The systems may store the acquired test data on removable, non volatile memory, such as Flash memory. The removable memory may be retrieved by an un-skilled technician periodically and returned to a lab or other test facility for subsequent analysis by highly trained analysts.

Abstract: Methods of testing at least a transmission line of interest within a group of transmission lines for anomalies using Time Domain Reflectometry are provided. The testing methods set forth herein aim to improve, for example, the quality and accuracy of information collected when propagating signals along a length of transmission line in order to pinpoint specific anomalies. To achieve this and other benefits, the testing methods simultaneously impose, for example, pulses of equal magnitude and form onto a group of transmission lines, such as the phases cables of a three phase power transmission cable system. From this, at least one transmission line from the group is monitored for reflected signals caused by impedance change. An example TDR is also provided.

Abstract: A number of TDR systems and testing methods are provided that improve the quality and accuracy of information collected when propagating a signal along a length of cable in order to pinpoint specific anomalies. One or more of the TDR systems includes, for example, a computing device, a pulse generator, and at least one capacitive test sensor. The at least one capacitive test sensor transmits/receives pulses to/from a power system component, such as an insulated power cable, in a capacitive manner.

Abstract: A data acquisition system is provided that in one example comprises a sensor electrically coupled to a data acquisition unit via a signal splitter. In use, the sensor senses one or more signals transmitted over a “live” power cable carrying, for example, 50 Hz or 60 Hz, medium voltage power. The one or more signals are then transmitted to the data acquisition unit to be stored, displayed, and/or analyzed. The data acquisition system includes a synchronizer that allows the data acquisition unit to synchronize the storage of the sensed signals to the frequency of the power transmitted over the tested power cable or system. In one embodiment, the synchronizer provides an accurate phase angle reference or trigger signal for accurate phase resolved data acquisition and testing.

Abstract: A guidance system for a drill tool (1) comprising a primary guidance package and a magnetic solenoid transmitter (9). The primary guidance package contains signal generator. The signal generator produces a signal indicative of the location of the drill tool 1. The magnetic solenoid transmitter both transmits the primary guidance data to a signal processor and emits an electromagnetic field. Using a locator (35), an operator can periodically determine the actual drill tool position by detecting the electromagnetic field. The actual position of the drill tool as determined by the electromagnetic field is used to correct for an integration error that is introduced into the drill tool position by the guidance technique used by the primary guidance package.

Abstract: A guidance system for a drill tool (1) comprising a primary guidance package and a magnetic solenoid transmitter (9). The primary guidance package contains signal generator. The signal generator produces a signal indicative of the location of the drill tool 1. The magnetic solenoid transmitter both transmits the primary guidance data to a signal processor and emits an electromagnetic field. Using a locator (35), an operator can periodically determine the actual drill tool position by detecting the electromagnetic field. The actual position of the drill tool as determined by the electromagnetic field is used to correct for an integration error that is introduced into the drill tool position by the guidance technique used by the primary guidance package.