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 (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; by reception or emission of radio waves, other electromagnetic waves, or sonic waves, and based on propagation time G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V)
 G01P

Note(s)

Attention is drawn to the notes immediately following the class title (G01).

 G01P 1/00
Details of instruments
 G01P 1/02
·  Housings
 G01P 1/04
·  Special adaptations of driving means
 G01P 1/06
( transferred to G01P 1/07, G01P 1/12 )
 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 and angular speed; Measuring differences of linear and angular speeds (G01P 5/00-G01P 11/00 take precedence; counting mechanisms G06M)
 G01P 3/00

Note(s)

The sub-groups of this 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 (measuring short time intervals G04F)
 G01P 3/68
·  ·  using optical means, i.e. using infra-red, visible, or ultra-violet light (by reflection of waves G01S 17/00)
 G01P 3/70 - 
G01P 3/78
( covered by G01P 3/00 )
 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 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