NF EN 61206 : 1995
Current
The latest, up-to-date edition.
ULTRASONIC - CONTINUOUS-WAVE DOPPLER SYSTEMS - TEST PROCEDURES
12-01-2013
INTRODUCTION
SECTION 1: GENERAL
Clause
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Symbols
SECTION 2: OVERALL TESTS OF COMPLETE SYSTEMS
2.1 General considerations
2.1.1 Types of Doppler ultrasound systems
2.1.2 Worst case conditions
2.2 Initial conditions
2.2.1 Power supply
2.2.2 Test frequency, general conditions
2.2.3 Working distance
2.2.4 Zero-signal noise level
2.3 Doppler frequency response
2.3.1 Frequency response range
2.3.2 Doppler frequency accuracy
2.3.3 Large-signal performance
2.4 Spatial response
2.4.1 Axial response
2.4.2 Lateral response
2.5 Operating frequency
2.5.1 Acoustical measurement
2.5.2 Electrical measurement
2.6 Flow direction separation
2.6.1 Channel separation
2.6.2 Simultaneous flow
2.7 Response to Doppler spectrum
2.7.1 Volume-flow circuits
2.7.2 Maximum-frequency followers
SECTION 3: SPECIAL DOPPLER TEST OBJECTS
3.1 Doppler test objects
3.1.1 String Doppler test object
3.1.2 Band Doppler test object
3.1.3 Disk Doppler test object
3.1.4 Piston Doppler test object
3.1.5 Small ball test object
3.1.6 Flow Doppler test object
3.1.7 Water tank (or gel block)
Annexes
A (informative) Description of continuous-wave Doppler
ultrasound systems
B (informative) Rationale
C (informative) Bibliography
ZA (normative) Other international publications quoted in
this standard with the references of the relevant
European publications
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.