A method for monitoring a mixing ratio of a mixture of materials flowing through a conduit in a composite material production process. The conduit is arranged between an inlet for receiving the mixture and a curing assembly. The method comprises: obtaining an acoustic signature of the mixture of materials; controlling a transducer to emit an acoustic wave into the conduit; controlling a receiver to detect the acoustic wave after propagation of the acoustic wave through the conduit; and comparing an acoustic signature of the detected acoustic wave with the obtained acoustic signature to obtain monitoring data.

The invention relates to a device (1) at least for an acoustic temperature measurement in a gaseous medium (M) passing a medium channel (110) by means of runtime measurement of an acoustic pulse (AP) running through the gaseous medium (M) from at least a first transmitter arrangement (TA1) to at least a first receiver arrangement (RA1), the first transmitter arrangement (TA1) comprising a sound pulse generator (2) for the generating the acoustic pulse (AP), which is connected by a first acoustic channel (3) to a transmitter (4) which transmits the acoustic pulse (AP) into the medium (M), the first acoustic channel (3) being of acoustically dispersive design, and, the first receiver arrangement (RA1) comprising a receiver (5) for receiving the acoustic pulse (AP) after it has passed through the medium (M) and for transmitting it via a second acoustic channel (6) to a first microphone (7), preferably a piezoelectric microphone (7), for detecting the acoustic pulse (AP), the first acoustic channel (3) being curved towards the sound pulse generator (2) in such a way that the radiant heat of the medium (M) on the sound pulse generator (2) is at least greatly reduced, wherein at least the transmitter (4) comprises in the first acoustic channel (3) on its side (41) facing the medium (M) to be measured interfering element (42) which reflects a part (RI) of the acoustic pulse (AP) back into the first acoustic channel (3) of the first transmitter arrangement (TA1), in which a second microphone (8), preferably arranged on the side (43) of the transmitter (4) feeing the sound pulse generator (2), is arranged for detecting the back-reflected part (RI) of the acoustic pulse (AP), the device (1) further comprising a pulse discriminator (9) designed to determine the arrival times (AT) of the recorded acoustic pulses (AP) in a suitable way and to transmit them to an evaluation unit (10) designed to determine the temperature of the medium (M) from the runtime of the acoustic pulse (AP) from the transmitter (4) to the receiver (5), taking into account the arrival times (AT) determined by the pulse discriminator and the acoustic pulses (RI, AI) detected by first and second microphones (7,8).

The invention relates generally to an Internet of Things (IoT) enabled wireless sensor system using attached and/or embedded passive electromagnetic sensors (PES) with distribution hardware. One embodiment of this invention includes a wireless sensor system, which permits process control and predictive maintenance on a utility's electrical transmission and distribution grid. Another embodiment includes a wireless sensor system, which permits process control and predictive maintenance of liquid or gas through a pipeline. Another embodiment includes a wireless sensor system, which permits measurement of breathable air pollutants. Furthermore, a method of manufacturing a protective passive electromagnetic sensor pod and passive electromagnetic sensor equipped distribution hardware components is provided.

The invention relates generally to an Internet of Things (IoT) enabled wireless sensor system using attached and/or embedded passive electromagnetic sensors (PES) with distribution hardware. One embodiment of this invention includes a wireless sensor system, which permits process control and predictive maintenance on a utility's electrical transmission and distribution grid. Another embodiment includes a wireless sensor system, which permits process control and predictive maintenance of liquid or gas through a pipeline. Another embodiment includes a wireless sensor system, which permits measurement of breathable air pollutants. Furthermore, a method of manufacturing a protective passive electromagnetic sensor pod and passive electromagnetic sensor equipped distribution hardware components is provided.

An environment condition measurement device includes a plurality of sound wave units installed on a periphery of a measurement target space. The sound wave units are located on a perimeter of a plurality of boundary planes virtually defining the target space. The sound wave units include a transmission unit to transmit a sound wave directionally and a reception unit to receive a sound wave directionally. The measurement device measures an environment condition in the target space based on propagation characteristics of the sound wave that propagates between the transmission and reception units. At least one of the sound wave units is installed in an orientation in which a directivity axis exhibiting a maximum intensity of a directivity of transmission or reception is inclined at a predetermined angle relative to at least one of the boundary planes at which the at least one of the sound wave units is located.

In one aspect, a screening tool for detecting whether a predetermined type of liquid is contained in a container includes a sensor arm subsystem in communication with a processing subsystem. The processing subsystem includes a processor disposed in a housing, an AC/DC converter electrically coupled to the processor, and ultrasonic components electrically coupled to the processor and the AC/DC converter. The sensor arm subsystem includes a sensor electrically coupled to the ultrasonic components, a temperature sensor electrically coupled to the processor, and an operator interface electrically couple to the processor.

The present invention relates to a surface acoustic wave-based material measuring device, material measuring system, and material measuring method, and more particularly, to a technique of accurately and reliably measuring various inherent physical properties of temperature and frequency-dependent materials by generating multiple resonant waves.

A system and a method to determine a compensated speed of sound (SoS) for a gas is disclosed. The system comprises a first sensor configured to determine a current temperature of the gas flowing within a gas channel; a second sensor configured to emit signals within the gas to determine a gas flow rate; and at least one processor configured to determine an absolute time of flight (aToF) of the signals in an upstream direction and a downstream direction; a delta time of flight (dToF) of the signals based on the aToF in the upstream direction and downstream direction; a gas flow rate based on the aToF and the dToF; a SoS within the gas based on the aToF; and the compensated SoS for the gas based at least on the determined SoS, a base condition, the determined gas flow rate, and the determined current temperature of the gas.

A fluid property measurement system, comprising at least one waveguide. A sheath substantially surrounds the waveguide and is arranged coaxially with the waveguide. An electronic assembly is operatively coupled to the waveguide and the sheath, the electronic assembly configured to produce a first torsional ultrasonic wave signal through the waveguide, a second torsional ultrasonic wave signal through the sheath, and a longitudinal ultrasonic wave signal through at least one of the waveguide and the sheath. An energy system and a method of measuring properties of a fluid are also disclosed.

The disclosure describes techniques for a fluid meter or other device to compensate for errors in ultrasonic flowrate measurement. In an example, a fluid meter measures a fluid (typically water) having an additive or impurity, such as glycol, or salt, respectively. When metering such a fluid, ultrasonic fluid metering devices may produce slightly inaccurate results. Accordingly, an adjustment factor, based on the fluid, the additive or impurity, and the temperature, would be desirable. In an example, the fluid (e.g., water and an additive or an impurity) and the temperature of the fluid are determined. The speed of sound through the fluid is measured, and mapped to a concentration (e.g., a percentage of the additive or impurity). The concentration is mapped to a viscosity, and the viscosity is mapped to the adjustment factor. The adjustment factor is used to adjust (or correct) a flowrate measured by an ultrasonic metrology device.