High temperature ultrasonic viscometer

Details High temperature ultrasonic viscometer High temperature ultrasonic viscometer

1986-06-09

1988-10-25

Levy, Stewart J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

G01N 1100

Patent

active

047794526

ABSTRACT:
An ultrasonic viscometer is described which is particularly designed for monitoring the viscosity of a thermally curing resin or composite, such as a fiber-reinforced epoxy composite, in an autoclave at high temperature. According to a preferred embodiment, the viscometer comprises a piezoelectric element of lithium niobate crystals bonded to a first buffer of copper, which is bonded on the other side to a second buffer of aluminum. The resin or composite is in contact with the second buffer. When the transducer emits a short ultrasonic pulse, two echoes are reflected back, the first echo being generated by the copper-aluminum interface, the second by the aluminum-resin interface. The signals from the two echoes are processed to obtain the complex reflection coefficient at the interface of the second buffer and the resin, from which the viscosity of the resin can be calculated and the cure state of the resin determined.

REFERENCES:
patent: 2755662 (1956-07-01), Swengel
patent: 3553636 (1971-01-01), Baird
patent: 4559810 (1985-12-01), Hinrichs et al.

Affiliated with

Also associated with

Rating

High temperature ultrasonic viscometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High temperature ultrasonic viscometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High temperature ultrasonic viscometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2261961