Abstract:
An ultrasonic transducer assembly is provided comprising an ultrasonic transducer, an ultrasonic booster, an ultrasonic probe, and a booster cooling unit. The ultrasonic booster is connected to the ultrasonic transducer to amplify acoustic energy generated by the ultrasonic transducer and transfer the amplified acoustic energy to the ultrasonic probe. A seated end of the ultrasonic probe is positioned in a probe seat of the ultrasonic booster. The booster cooling unit is positioned to regulate the temperature of the probe seat of the ultrasonic booster such that the assembly supports a temperature dependent press-fit engagement of the seated end of the ultrasonic probe and the probe seat of the ultrasonic booster. The temperature dependent press-fit engagement is such that the seated end of the ultrasonic probe can be reversibly moved in and out of the probe seat at an elevated temperature ???t and is fixed in the probe seat at room temperature TCOLD. A method of applying ultrasonic acoustic energy to a glass melt by monitoring a glass melt temperature TY and transferring ultrasonic acoustic energy from an ultrasonic transducer to the glass melt at a controller power Pc and a controller frequency Vc through an ultrasonic probe positioned in the glass melt is provided. Systems for applying ultrasonic acoustic energy to glass melts are also provided.
Abstract:
A glass laminate includes at least one chemically-strengthened glass sheet and a polymer interlayer formed over a surface of the sheet. The chemically-strengthened glass sheet has a thickness of less than 2.0 mm, and a near-surface region under a compressive stress. The near surface region extends from a surface of the glass sheet to a depth of layer (in micrometers) of at least 65-0.06(CS), where CS is the compressive stress at the surface of the chemically-strengthened glass sheet and CS > 300 MPa.
Abstract:
Embodiments disclosed herein include a device with an integrated acoustics function that includes a patterned touch screen cover, an acoustic thin film, a plurality of electrodes, and a substrate. In some embodiments, the substrate is coupled to the acoustic thin film and reduces heat loss from the acoustic thin film through the substrate. The acoustic thin film may be coupled to the patterned touch screen cover and conducts an oscillating electrical current provided by the plurality of electrodes, thereby acting as a nano-scale acoustic generator. In still some embodiments, the patterned touch screen cover provides an array of microspeakers and a viewing area, where the array of microspeakers is disposed around a perimeter of the patterned touch screen cover.
Abstract:
An ultrasonic transducer assembly is provided comprising an ultrasonic transducer, an ultrasonic booster, an ultrasonic probe, and a booster cooling unit. The ultrasonic booster is connected to the ultrasonic transducer to amplify acoustic energy generated by the ultrasonic transducer and transfer the amplified acoustic energy to the ultrasonic probe. A seated end of the ultrasonic probe is positioned in a probe seat of the ultrasonic booster. The booster cooling unit is positioned to regulate the temperature of the probe seat of the ultrasonic booster such that the assembly supports a temperature dependent press-fit engagement of the seated end of the ultrasonic probe and the probe seat of the ultrasonic booster. The temperature dependent press-fit engagement is such that the seated end of the ultrasonic probe can be reversibly moved in and out of the probe seat at an elevated temperature Τ Ηοτ and is fixed in the probe seat at room temperature T COLD . A method of applying ultrasonic acoustic energy to a glass melt by monitoring a glass melt temperature TY and transferring ultrasonic acoustic energy from an ultrasonic transducer to the glass melt at a controller power P c and a controller frequency V c through an ultrasonic probe positioned in the glass melt is provided. Systems for applying ultrasonic acoustic energy to glass melts are also provided.
Abstract:
A method of forming a cladding portion of an optical fiber preform assembly includes positioning a glass core cane in a mold cavity and loading the mold cavity with silica glass soot. The silica glass soot is compressed in an axial direction as the vibratory energy is applied to the mold body to form a soot compact around the glass core cane, wherein the soot compact is the cladding portion of an optical fiber preform assembly and the glass core cane is a core portion of the optical fiber preform assembly.
Abstract:
An acoustic emission system and method are described herein that detect the glass break energy (or another parameter) that is created when a glass sheet is scored and broken. In the preferred embodiment, the acoustic emission system includes an acoustic emission sensor, a data acquisition system and a processor. The acoustic emission sensor interfaces with a glass sheet and generates an acoustic emission signal which is representative of acoustic emission waveforms that are created when the glass sheet was scored and broken. The data acquisition system records the acoustic emission signal. And, the processor processes the recorded acoustic emission signal to determine the glass break energy (or another parameter). Then, the processor can use the glass break energy (or another parameter) to determine the quality of an edge of the broken glass sheet. In addition, the processor can use the glass break energy (or another parameter) as feedback to adjust the scoring and breaking of subsequent glass sheets.
Abstract:
A mesoporous, transition metal oxide material having an average pore diameter ranging from 2 to 20 nm, a basic surface character defined by an isoelectric point > pH 7, and a specific surface area greater than 50 m 2 /g can be incorporated into a NO x sensing device as a NO x film. The mesoporous, transition metal oxide material includes an oxide of yttrium, lanthanum and/or cerium, and can be formed using a surfactant-templated self-assembly process.
Abstract:
A fixed and/or stationary modular unit consists of a hydraulic fluid tank and a pressurization pump. A compressed gas transportation system consists of a set of cylinders. Each cylinder has a charging port and a dispensing port. A valve is connected at the dispensing port of each cylinder. Each of the valves at the dispensing ports of the cylinders are connected to one another. After an idle period of dispensing activity, the valves on the dispensing ports of the cylinders are opened and compressed gas is bled from one of the cylinders into at least one of the other cylinders in the set until the at least one of the other cylinders reaches a desired dispensing pressure. Hydraulic fluid is pumped from the tank into the cylinder being bled from to maintain a substantially constant pressure within the cylinder.
Abstract:
A method and device for detecting the presence or absence of internal discontinuities or inhomogeneities in a fired or green ceramic honeycomb structure is provided. In the method, an ultrasonic transmitter (33) and receiver (35) are positioned on outer locations of the honeycomb structure, and the transmitter is actuated to generate an ultrasonic wave that is conducted through an inner portion of the honeycomb structure (40), and received by the ultrasonic receiver. The received ultrasonic wave is filtered and then analyzed to determine the presence of internal discontinuities (17). The transmitter generates ultrasonic waves having a frequency of five megahertz or less to maintain a high signal to noise ratio in the propagated wave received by the ultrasonic receiver. The device of the invention includes an array of ultrasonic transmitters and receivers which are simultaneously actuated as a ceramic substrate is moved relative thereto to quickly and efficiently provide a full, non-contact scan of the ceramic body for discontinuities.
Abstract:
An acoustic emission system and method are described herein that detect the glass break energy (or another parameter) that is created when a glass sheet (150) is scored and broken. In the preferred embodiment, the acoustic emission system (100) includes an acoustic emission sensor (102), a data acquisition system (104) and a processor (106). The acoustic emission sensor (102) interfaces with a glass sheet (150) and generates of acoustic emission waveforms (108) that are created when the glass sheet (150) was scored and broken. The data acquisition system (105) records the acoustic emission signals (108). And, the processor (106) processes the recorded acoustic emission signals to determine the glass break energy (or another parameter). Then, the processor (106) can use the glass break energy (or another parameter) to determine the quality of an edge of the broken glass sheet (150). In addition, the processor ( 106) can use the glass break energy (or another parameter) as feedback to adjust the scoring and breaking of subsequent glass sheets (150).