Abstract: A method of determining mass flow rate and phase distribution of gas/liquid two-phase flows is disclosed. The method uses a Coriolis-based mass flow meter. Flow streams of known mass flow rate and phase distribution are directed through the meter and correlation factors are obtained using an apparent mass flow rate output and an apparent density output from the Coriolis meter. The true mass flow rate and phase distribution of unknown flow streams can then be determined.

Abstract: An electronic motor control system is taught herein which utilizes a speedometer testing circuit. The (electronic) speedometer/odometer of a vehicle is tested, with the testing device being interconnected with the (input) terminals of the speedometer, exclusive of whether the speedometer is installed or removed from the vehicle. The testing device is utilized without vehicle input to the speedometer in order to determine whether the speedometer can produce an expected signal upon testing thus determining whether the speedometer is functional or not. The testing circuit has a self-contained power supply, is compact in size, and lightweight, thereby insuring complete mobility of the testing unit and dual application of the circuit to both installed and disengaged speedometer and odometer mechanisms.

Abstract: A densitometer (10) provides a chamber (24) within which a ferromagnetic bob (27) is shuttled back and forth by alternate driving of two coils (32 and 34). Measurement circuitry (FIG. 2) determines the density of the fluid inside the chamber (24) by comparing the stroke times in opposite directions.

Abstract: For the measurement of accelerations, e.g. gravitation components for goniometry, in the oscillating circuit of two RC oscillators capacitors are provided, which in a common, metallic casing between two electrode plates (2,3) have a spring-elastically held, common, circular deflection part. In order to avoid dielectric interference, the electronic means are arranged on one side of the instrument, are surrounded by a metallic cover and their electrical connection to the more remote electrode plate takes place by a wire, which is passed in contact-free manner through a central hole in the circular deflection part and the closer electrode plate. The spacing between the deflection part and the electrode plates remains constant in the case of a non-deflected deflection part, in that its size forms a ratio .sub.E - .sub.M : .sub.M to the thickness of the spacers insulating the electrode plates from the metallic casing, .sub.E corresponding to the thermal expansion coefficient of the spacers and .sub.

Abstract: A method of making a storage tank comprises forming a cylindrical-shaped inner tank with integral support ribs and forming an outer wall comprised of a series of sections which are at least partially separated from the inner tank's walls between each set of support ribs. Each outer wall section is bonded to side walls of adjoining ribs at a distance of less than about 90% of the height of the support ribs such that the ribs protrude from the outer surface of the storage tank system. The inner and outer walls of the system are both strengthened by the common support ribs. Secondary containment is provided by the outer wall. A monitored storage tank system is provided by the use of a leak detection means to monitor the closed space defined by the rib interiors, the outer wall and the storage tank.

Abstract: A vibrating force transducer suitable for use in a pendular accelerometer mprises a flat elongated strip of piezo-electric material having end portions arranged for being securely connected to elements which apply a force to be measured along the direction of elongation when the transducer is in service. The strip is fractionated by slits parallel along the direction of elongation and orthogonal to major faces of the strips into a central beam and lateral beams which are in a common plane, the lateral beams carrying electrode means for flexural vibration in the common plane at a resonance frequency indicative of the value of the force applied to the end portions and the central beam carrying a resistive temperature sensor.

Abstract: Method and system for measuring vertical density profile of fluid by pressurizing an array of pipes, determining level and pressure signals on each pipe and deriving profile therefrom.

Abstract: An angular rate sensor has a tuning fork structure composed of vibratory components. The vibratory components include piezoelectric drive and detection elements which are joined together into a tuning fork configuration, the drive and detection elements lying in respective orthogonal planes. Leads are electrically connected to the drive and detection elements, and lead terminals are electrically connected to the leads, respectively. The vibratory components are covered with a coating which is of a material having a lower elasticity than the elasticities of the vibratory components. The coating on the vibratory components effectively reduces the propagation of unwanted vibrations, thereby reducing output signal drifts.

Abstract: In an oxygen sensor having a plate-shaped oxygen sensor element, a measuring electrode on the broader width surface of the plate-shaped sensor element, and a protective cover covering the plate-shape sensor element, wherein the protective cover has gas inlet holes for introducing a gas to be measured therein and guide plates for changing the direction of the flow of a gas to be measured. The gas inlet holes have different spacings compared to each other, the guide plates and the gas inlet holes have different lengths compared to each other in the axial direction of the protective cover, and/or the gas inlet holes have different opening extents compared to each other. Consequently, the oxygen sensor always can provide a homogeneous swirling flow of the gas to be measured in the protective cover as well as precise measurement of the gas and a constant .lambda. controlling point.

Abstract: Pipe inspection apparatus comprising transducers for transmitting pulsed beams of ultrasonic energy longitudinally, transversely and obliquely into the wall of the pipe for detection of flaws. The apparatus includes a motor driven chuck 18 for rotating the transducers about the a pipe P and motor driven roller 12 for axial movement of the pipe whereby the transducers move in a helical scanning path. A control system 60 maintains the axes of the pipe and circle array of transducers in coincidence and with hydraulic controls 80 maintains each transducer at fixed distance to the pipe for sonically coupling thereto by a flowing liquid whereby a shear wave is generated by each beam in the tubular wall. The transducers comprise multiple pairs, the members of which are diametrically opposed and transmit in opposite directions, for transmitting longitudinally at angles of 12.degree., 27.degree. and 42.degree.

Abstract: An apparatus for processing acoustic emissions or stress waves in order to recognize features indicative of variations in the process producing the acoustic emissions. The apparatus comprises a transducer acoustically coupled to a machine or industrial process and arranged to detect the acoustic emissions and produce an electrical signal. The electrical signal is amplified by an amplifier and the mean level of the electrical signal is measured by a mean level detector and the minimum level of the electrical signal is measured by a minimum level detector. A ratio measurer measures the ratio of the mean level of the electrical signal to the minimum level of the electrical signal. This method is self compensating for variations in the operating conditions of the machine or industrial process, is not significantly affected by electromagnetic switching transients, and can cope with very high numbers of transient excursions.

Abstract: An improved speedometer assembly of the electronic type which utilizes an electric motor mounted to a frame whereby the motor has an end flange portion supported against the frame by means of at least one swingable gate-like latches which are attached to a stationary support by an integral living hinge portion which provides a force against the edge of the flange.

Abstract: A battery condition readout device is disclosed. A series of slides of varying densities float or sink according to the amount of charge. An optical system permits slide position to be seen at a point external to the battery.