Patent ID: 7685861
Filing Date: 2010-03-30
Classification: G01N

Abstract:
1. A calibration device for use in calibrating ultrasonic pulse echo apparatus for detecting a moving object in a fluid, where the ultrasonic pulse echo apparatus includes an ultrasonic transducer and calibration circuitry, the calibration device comprising: a connector for connecting at a first end with a first fluid conduit and at a second end with a second fluid conduit, the connector including a cavity between the first and second ends to permit the fluid containing the moving object from the first conduit to flow through the connector cavity to the second fluid conduit, and a first calibration sphere positioned relative to the connector for reflecting an ultrasonic pulse signal transmitted by the ultrasonic transducer, wherein the reflected ultrasonic pulse signal is useable by the calibration circuitry to calibrate the ultrasonic pulse echo apparatus, and wherein the connector further comprises a recess formed in the outer surface of the connector opposite the first calibration sphere for receiving and orienting the ultrasonic transducer.