G
SECTION G — PHYSICS
  
INSTRUMENTS
 G01
MEASURING (counting G06M); TESTING
 G01P
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B 5/02, A61B 8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L 3/00; vehicle lighting systems adapted to indicate speed B60Q 1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C 23/00; measuring velocity of sound G01H; measuring velocity of light G01J 7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V)
 G01P

Note(s)

  1. This subclass covers measuring direction or velocity of flowing fluids using propagation effects of radiowaves or other waves caused in the fluid itself, e.g. by laser anemometer, by ultrasonic flowmeter with "sing-around-system". [4]
  2. Attention is drawn to the Notes following the title of class G01.
 G01P 1/00
Details of instruments
 G01P 1/02
·  Housings
 G01P 1/04
·  Special adaptations of driving means
 G01P 1/07
·  Indicating devices, e.g. for remote indication (indicating measured values in general G01D; indicating working conditions of vehicles G07C 5/00)  [3]
 G01P 1/08
·  ·  Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers
 G01P 1/10
·  ·  ·  for indicating predetermined speeds
 G01P 1/11
·  ·  ·  ·  by the detection of the position of the indicator needle  [3]
 G01P 1/12
·  Recording devices (recording measured values in general G01D; registering working conditions of vehicles G07C 5/00)  [3]
 G01P 1/14
·  ·  for permanent recording  [3]
 G01P 1/16
·  ·  for erasable recording, e.g. magnetic recording  [3]
 G01P 3/00
Measuring linear or angular speed; Measuring differences of linear or angular speeds (G01P 5/00-G01P 11/00 take precedence; counting mechanisms G06M)
 G01P 3/00

Note(s)

The subgroups of this main group are distinguished by the method of measurement which is of major importance. Thus the mere application of other methods for giving a final indication does not affect the classification.

 G01P 3/02
·  Devices characterised by the use of mechanical means
 G01P 3/04
·  ·  by comparing two speeds
 G01P 3/06
·  ·  ·  using a friction gear
 G01P 3/08
·  ·  ·  using differential gearing
 G01P 3/10
·  ·  by actuating an indicating element, e.g. pointer, for a fixed time
 G01P 3/12
·  ·  by making use of a system excited by impact
 G01P 3/14
·  ·  by exciting one or more mechanical resonance systems
 G01P 3/16
·  ·  by using centrifugal forces of solid masses (governors G05D 13/00)
 G01P 3/18
·  ·  ·  transferred to the indicator by mechanical means
 G01P 3/20
·  ·  ·  transferred to the indicator by fluid means
 G01P 3/22
·  ·  ·  transferred to the indicator by electric or magnetic means
 G01P 3/24
·  ·  by using friction effects (G01P 3/06 takes precedence)
 G01P 3/26
·  Devices characterised by the use of fluids
 G01P 3/28
·  ·  by using pumps
 G01P 3/30
·  ·  by using centrifugal forces of fluids
 G01P 3/32
·  ·  ·  in a rotary container communicating with a fixed container
 G01P 3/34
·  ·  by using friction effects
 G01P 3/36
·  Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light (G01P 3/68 takes precedence)
 G01P 3/38
·  ·  using photographic means
 G01P 3/40
·  ·  using stroboscopic means
 G01P 3/42
·  Devices characterised by the use of electric or magnetic means (G01P 3/66 takes precedence; measuring electric or magnetic values in general G01R)
 G01P 3/44
·  ·  for measuring angular speed (G01P 3/56 takes precedence)
 G01P 3/46
·  ·  ·  by measuring amplitude of generated current or voltage
 G01P 3/48
·  ·  ·  by measuring frequency of generated current or voltage
 G01P 3/481
·  ·  ·  ·  of pulse signals  [3]
 G01P 3/482
·  ·  ·  ·  ·  delivered by nuclear radiation detectors  [3]
 G01P 3/483
·  ·  ·  ·  ·  delivered by variable capacitance detectors  [3]
 G01P 3/484
·  ·  ·  ·  ·  delivered by contact-making switches  [3]
 G01P 3/486
·  ·  ·  ·  ·  delivered by photo-electric detectors  [3]
 G01P 3/487
·  ·  ·  ·  ·  delivered by rotating magnets  [3]
 G01P 3/488
·  ·  ·  ·  ·  delivered by variable reluctance detectors  [3]
 G01P 3/489
·  ·  ·  ·  ·  Digital circuits therefor  [3]
 G01P 3/49
·  ·  ·  using eddy currents
 G01P 3/495
·  ·  ·  ·  where the indicating means responds to forces produced by the eddy currents and the generating magnetic field  [3]
 G01P 3/50
·  ·  for measuring linear speed (G01P 3/56 takes precedence)
 G01P 3/52
·  ·  ·  by measuring amplitude of generated current or voltage
 G01P 3/54
·  ·  ·  by measuring frequency of generated current or voltage
 G01P 3/56
·  ·  for comparing two speeds
 G01P 3/58
·  ·  ·  by measuring or comparing amplitudes of generated currents or voltages
 G01P 3/60
·  ·  ·  by measuring or comparing frequency of generated currents or voltages
 G01P 3/62
·  Devices characterised by the determination of the variation of atmospheric pressure with height to measure the vertical components of speed (measuring pressure in general G01L)
 G01P 3/64
·  Devices characterised by the determination of the time taken to traverse a fixed distance
 G01P 3/66
·  ·  using electric or magnetic means (G01P 3/80 takes precedence; measuring short time intervals G04F)
 G01P 3/68
·  ·  using optical means, i.e. using infra-red, visible, or ultra-violet light (G01P 3/80 takes precedence)
 G01P 3/80
·  ·  using auto-correlation or cross-correlation detection means  [4]
 G01P 5/00
Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft (application of speed-measuring devices for measuring volume of fluids G01F)
 G01P 5/01
·  by using swirlflowmeter  [3]
 G01P 5/02
·  by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
 G01P 5/04
·  ·  using deflection of baffle-plates
 G01P 5/06
·  ·  using rotation of vanes (measuring speed of rotating shafts G01P 3/00)
 G01P 5/07
·  ·  ·  with electrical coupling to the indicating device  [3]
 G01P 5/08
·  by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
 G01P 5/10
·  by measuring thermal variables
 G01P 5/12
·  ·  using variation of resistance of a heated conductor
 G01P 5/14
·  by measuring differences of pressure in the fluid
 G01P 5/16
·  ·  using Pitot tubes
 G01P 5/165
·  ·  ·  Arrangements or constructions of Pitot tubes  [3]
 G01P 5/17
·  ·  ·  Coupling arrangements to the indicating device  [3]
 G01P 5/175
·  ·  ·  ·  with the determination of Mach number (analogue computers therefor G06G 7/57)  [3]
 G01P 5/18
·  by measuring the time taken to traverse a fixed distance
 G01P 5/20
·  ·  using particles entrained by a fluid stream (G01P 5/22 takes precedence)
 G01P 5/22
·  ·  using auto-correlation or cross-correlation detection means  [4]
 G01P 7/00
Measuring speed by integrating acceleration (measuring travelled distance by double integration of acceleration G01C 21/16)
 G01P 9/00
Measuring speed by using gyroscopic effect, e.g. using gas, using electron beam (gyroscopes or turn-sensitive devices per se G01C 19/00)
 G01P 9/02
·  using rotary gyroscopes
 G01P 9/04
·  using turn-sensitive devices with vibrating masses, e.g. tuning-fork
 G01P 11/00
Measuring average value of speed (by determining time taken to traverse a fixed distance G01P 3/64, G01P 5/18)
 G01P 11/02
·  Measuring average speed of a number of bodies, e.g. of vehicles for traffic control
 G01P 13/00
Indicating or recording presence, absence, or direction, of movement (counting moving objects G06M 7/00; electric switches H01H)
 G01P 13/02
·  Indicating direction only, e.g. by weather vane
 G01P 13/04
·  ·  Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement  [3]
 G01P 15/00
Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
 G01P 15/02
·  by making use of inertia forces (G01P 15/14 takes precedence)
 G01P 15/03
·  ·  by using non-electrical means  [3]
 G01P 15/04
·  ·  for indicating maximum value
 G01P 15/06
·  ·  ·  using members subjected to a permanent deformation
 G01P 15/08
·  ·  with conversion into electric or magnetic values
 G01P 15/09
·  ·  ·  by piezo-electric pick-up  [3]
 G01P 15/10
·  ·  ·  by vibratory strings
 G01P 15/11
·  ·  ·  by inductive pick-up  [3]
 G01P 15/12
·  ·  ·  by alteration of electrical resistance
 G01P 15/125
·  ·  ·  by capacitive pick-up  [3]
 G01P 15/13
·  ·  ·  by measuring the force required to restore a proofmass subjected to inertial forces to a null position  [3]
 G01P 15/135
·  ·  ·  by making use of contacts which are actuated by a movable inertial mass  [3]
 G01P 15/14
·  by making use of gyroscopes (gyroscopes per se G01C 19/00)
 G01P 15/16
·  by evaluating the time-derivative of a measured speed signal  [3]
 G01P 21/00
Testing or calibrating of apparatus or devices covered by the preceding groups
 G01P 21/02
·  of speedometers