Abstract: A system for ultrasonic leak detection employs a number of ultrasonic signal generators, each of which include an ultrasonic transducer generating an ultrasonic signal and an audio transducer generating an audio signal in the frequency range of human hearing that is a replica of the ultrasonic waveform. The ultrasonic signal generators are activated and placed at selected locations within the enclosure to be tested. The operator can listen for the audio signal to verify operation and the output waveform type of the ultrasonic signal generators. A mobile ultrasonic leak detector can then be employed outside the enclosure to detect any leakage of the ultrasonic signal through the enclosure wall to identify any leak paths.

Abstract: A method for displaying sensor readings in a measurement instrument having an array of display elements initially divides the range of interest of the sensor reading into a plurality of consecutive sub-ranges and determines a scaling function for displaying sensor readings for each sub-range. For each sensor reading, the appropriate sub-range is determined into which the sensor reading falls (where N is the number of this sub-range). The scaling function for the Nth sub-range is applied to display the sensor reading using N consecutive display elements. Optionally, the system may include a visual or audible indicator for the use when the display rolls from one sub-range to another. The display may also include feature indicating the peak sensor reading encountered.

Abstract: A system for ultrasonic leak detection employs a number of ultrasonic signal generators, each of which include an ultrasonic transducer generating an ultrasonic signal and an audio transducer generating an audio signal in the frequency range of human hearing that is a replica of the ultrasonic waveform. The ultrasonic signal generators are activated and placed at selected locations within the enclosure to be tested. The operator can listen for the audio signal to verify operation and the output waveform type of the ultrasonic signal generators. A mobile ultrasonic leak detector can then be employed outside the enclosure to detect any leakage of the ultrasonic signal through the enclosure wall to identify any leak paths.

Abstract: A system for wireless multiple user access to a sensor comprises a sensor unit having a sensor element (e.g. a leak detector), a sensor user interface, and a sensor wireless transceiver that transmits information corresponding to the sensor output. One or more receiving units each receive the sensor information corresponding to the output of the sensor user interface, and provide that output to a receiver user interface. Multiple receiving units may be used, for example, by students receiving training on the use of a sensor unit. An instructor unit can provided to allow an instructor to review the sensor information and create instructional commentary that is transmitted to each of the student receiver units along with the sensor information.

Abstract: A system for wireless multiple user access to a sensor comprises a sensor unit having a sensor element, a sensor user interface, and a sensor wireless transceiver that transmits information corresponding to the output of the sensor user interface. One or more receiving units each receive the information corresponding to the output of the sensor user interface, and provide that output to a receiver user interface. The receiver may be located near the sensor unit, or may be located remotely from the sensor unit. Multiple receiving units may be used, for example, by students receiving training on the use of a sensor unit.

Abstract: A system for wireless multiple user access to a sensor comprises a sensor unit having a sensor element (e.g. a leak detector), a sensor user interface, and a sensor wireless transceiver that transmits information corresponding to the sensor output. One or more receiving units each receive the sensor information corresponding to the output of the sensor user interface, and provide that output to a receiver user interface. Multiple receiving units may be used, for example, by students receiving training on the use of a sensor unit. An instructor unit can provided to allow an instructor to review the sensor information and create instructional commentary that is transmitted to each of the student receiver units along with the sensor information.

Abstract: Provided is a device for use in locating the origin of a phenomenon of interest, including a sensor capable of detecting the presence of the phenomenon of interest and generating a detection signal in response thereto. The device also includes a phenomenon origin locator to monitor the detection signal and project light toward the origin when the detection signal satisfies a selected criteria level, thereby indicating the origin of the phenomenon of interest.

Abstract: Provided is a device for use in locating the origin of a phenomenon of interest, including a sensor capable of detecting the presence of the phenomenon of interest and generating a detection signal in response thereto. The device also includes a phenomenon origin locator to monitor the detection signal and project light toward the origin when the detection signal satisfies a selected criteria level, thereby indicating the origin of the phenomenon of interest.

Abstract: Methods are provided for monitoring acoustic emissions from machinery using one or more acoustic sensing devices each mounted to respective mounting regions of the machinery to expose them to progogating sound waves. Detection signals corresponding to the sound waves are transmitted to measuring instrumentation for display, as desired.

Abstract: A system for wireless multiple user access to a sensor comprises a sensor unit having a sensor element, a sensor user interface, and a sensor wireless transceiver that transmits information corresponding to the output of the sensor user interface. One or more receiving units each receive the information corresponding to the output of the sensor user interface, and provide that output to a receiver user interface. The receiver may be located near the sensor unit, or may be located remotely from the sensor unit. Multiple receiving units may be used, for example, by students receiving training on the use of a sensor unit.

Abstract: Provided is a device for use in locating the origin of a phenomenon of interest, including a sensor capable of detecting the presence of the phenomenon of interest and generating a detection signal in response thereto. The device also includes a phenomenon origin locator to monitor the detection signal and project light toward the origin when the detection signal satisfies a selected criteria level, thereby indicating the origin of the phenomenon of interest.

Abstract: Provided is a method of monitoring a device to ascertain leakage of the gas there from. An area in the vicinity of the gas is illuminated with ultraviolet light, thereby causing the gas or its residue to fluoresce. A gas sensor is exposed to the gas whereby it generates the gas detection input signal, which is then processed to produce at least one output signal in response thereto.

Abstract: Acoustic sensing devices, systems and methods are provided for monitoring emissions from machinery. Representative is an acoustic sensing device for transmitting to a measuring instrumentation detection signals indicative of sound wave levels from the machinery. A housing assembly is constructed for removable attachment between a surface mounting region of the machinery and the measuring instrument to define a coupled state. An acoustic emissions (AE) sensor is located in the housing assembly's interior and detects sound waves propagating through the surface mounting region to produce detection signals for processing. A mounting adapter may be employed to interface the housing assembly to the machinery's surface mounting region.

Abstract: A leak detection instrument may comprise a housing, a gas sensor supported relative to the housing, an AE sensor for generating a sound detection input signal upon exposure to gas leakage, processing circuitry for producing output signals, and an output device. The AE sensor may include an elongated mounting member, an AE sensor housing supported by the mounting member, and an AE sensor disposed therein. Improvements to leak detection instruments, an AE sensor mounting assembly and a method of monitoring a device to ascertain leakage of a target gas therefrom are also provided.

Abstract: A device and system are provided for monitoring acoustic emissions from machinery to indicate levels of detected sound waves. Each incorporates an acoustic sensing device which incorporates a housing assembly constructed for removable attachment between a surface mounting region of the machinery and a measuring instrument to define a coupled state. An acoustic emissions sensor is disposed in the housing assembly's interior to detect sound waves propagating through the surface mounting region and to produce detection signals for processing by the measuring instrument. A methodology for monitoring acoustic emissions is also provided.

Abstract: A device and system are provided for monitoring acoustic emissions from machinery to indicate levels of detected sound waves. Each incorporates an acoustic sensing device which broadly comprises a housing assembly constructed for removable attachment between a surface mounting region of the machinery and a measuring instrument to define a coupled state. An acoustic emissions sensor is disposed in the housing assembly's interior to detect sound waves propagating through the surface mounting region and to produce detection signals for processing by the measuring instrument. A methodology for monitoring acoustic emissions is also provided.

Abstract: A signal detector for monitoring sound signals comprises a first sensor operative in response to sound signals to produce a first electrical signal, first processing circuitry operative in response to the first electrical signal to amplify it and produce a first input signal, digitally controlled oscillator circuitry operative to produce a reference signal at a selected reference signal frequency, a mixer operative to receive the first input signal and reference signal to produce a mixed composite signal, conditioning circuitry operative in response to the mixed composite signal to produce a first amplified output signal, and a first output device for producing a first display in response to the first amplified output signal. A methodology is also provided for monitoring sound signals in order to indicate a presence of those signals having frequencies within a selected range.

Abstract: A resonator assembly adapted for use with a signal detection instrument includes a sensor operative to detect airborne sound signals and a touch rod. The resonator assembly operates to convert sound signals traveling within the touch rod into the airborne sound signals for detection by the sensor and comprises a mount adapted to interconnect the signal detection instrument and the touch rod, a flexible resonator element, and a stem interconnecting the mount and the resonator element so that, when the touch rod is secured to the mount and the mount is secured to the signal detection instrument thereby positioning the resonator element relative to the sensor, the resonator element operates to convert the sound signals traveling within the touch rod into the airborne sound signals for detection by the sensor. A touch probe resonator is also provided for converting sound signals traveling in a first medium into sound signals traveling in a second medium for detection by a sensor.

Abstract: The present invention generally relates to procedures and apparatus for monitoring incoming signals to detect the presence of selected target signals contained within the universe of signals received. More particularly, the present invention is directed to monitoring audio signals to detect selected ultrasonic and sonic signals in an ambient environment. Thus, the present invention is even more specifically directed to leak detectors and bearing wear indicators and methods for detecting sound signals which either travel in the air or are present in solids.

Abstract: A signal detector and signal detection methodology is provided to monitor oscillatory signals to produce detector output in response to the presence of target signals having a frequency within a selected frequency range. The detector has input processing circuitry that receives the oscillatory signals and filters out those which do not fall within the selected frequency range to produce an input signal. This initial signal is processed by a Schmitt-Trigger to create a square-wave signal. The processing circuit includes a scaler sub-circuit to divide the square-wave signal by an integer, and an integrating sub-circuit integrates the resulting scaled signal to produce the intermediate signal. An amplification circuit has variable gain controlled by averaging the amplitude of the input signal by way of the control component so that the initial signal is amplified according to the original amplitude to produce a scaled replica of the filtered input signal.