Abstract: A Ground Penetrating Radar (GPR) system makes use of digital circuitry for synchronizing the sampling of a received radar signal with a transmitted radar signal. The digital synchronization achieves improved waveform reproduction and greater receiver sensitivity. Furthermore, the system employs digital circuitry to control the gain of a receiver amplifier. The digitally controlled gain makes it possible to accurately calibrate the amplitude of received radar signals with great precision while achieving good dynamic range.

Abstract: Ground-penetrating radar (GPR) technology enables the detection of hidden objects that are underground or behind walls or other such surfaces. Embodiments of the present invention provide a realistic visualization of the hidden objects through so-called augmented reality techniques. Thanks to such visualization, interaction with hidden objects that are hazardous or delicate is easier and less prone to errors. Also, GPR-based data collection can be performed in non-real time, with object visualization occurring at a later time based on stored data that can also comprise annotations. This capability provides greater flexibility for scheduling activities related to the hidden objects.

Abstract: A Ground Penetrating Radar (GPR) system makes use of digital circuitry for synchronizing the sampling of a received radar signal with a transmitted radar signal. The digital synchronization achieves improved waveform reproduction and greater receiver sensitivity. Furthermore, the system employs digital circuitry to control the gain of a receiver amplifier. The digitally controlled gain makes it possible to accurately calibrate the amplitude of received radar signals with great precision while achieving good dynamic range.

Abstract: A gauge head (10) for an ionisation vacuum gauge includes an electrical device (12, 28, 54) operable to provide an electrical discharge in a gas whose pressure is to be measured to initiate ion discharge in the gas.

Abstract: A gauge head (10) for an ionisation vacuum gauge includes an electrical device (12, 28, 54) operable to provide an electrical discharge in a gas whose pressure is to be measured to initiate ion discharge in the gas.

Abstract: A work and display system and device including a flexible work support, a static cling material attached to the flexible work support having permanent markings on one side, and a coating having an outer surface for erasable marking. A work and display method.

Abstract: A thermal conductivity type pressure gauge comprises a gauge head (2) being rotatably mountable in a vessel whose environmental pressure is to be measured and an elongate electrical filament (6) mounted in the gauge head, the gauge head (2) having an inlet where through the electrical filament is exposed to the environmental pressure within the vessel and the filament (6) having directional component lengths in two orthogonal axes, one of the orthogonal axes X—X being parallel to the axis of rotation of the gauge head (2).

Abstract: A thermal conductivity type pressure gauge comprises a gauge head (2) being rotatably mountable in a vessel whose environmental pressure is to be measured and an elongate electrical filament (6) mounted in the gauge head, the gauge head (2) having an inlet where through the electrical filament is exposed to the environmental pressure within the vessel and the filament (6) having directional component lengths in two orthogonal axes, one of the orthogonal axes X-X being parallel to the axis of rotation of the gauge head (2).

Abstract: A conduit supplies a flow of gas to a sealed chamber surrounding the swept volume of a pump. The conduit comprises a flow impedance for limiting the rate of flow of the gas to the sealed chamber. Signals output from pressure transducers provided on either side of the flow impedance are used to detect leakage of gas from the sealed chamber into the pump swept volume, thus indicating the state of the seal surrounding the swept volume.