IPC 7 English version G01P !A-G01P 21/02

G01P-G01P02102

SECTION G – PHYSICS

G 01

MEASURING (counting G06M); TESTING

G 01 P

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; determining direction or velocity of solid objects by reflection or reradiation of radio 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)

Notes

(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.

Subclass Index

INDICATING MOVEMENT OR DIRECTION OF MOVEMENT

G01P 13/00

MEASURING LINEAR OR ANGULAR SPEED OF SOLID BODIES

Characterised by prevailing principle of action of the means

G01P 3/00

By integration; by gyroscopic effect; by averaging

G01P 7/00; G01P 9/00; G01P 11/00

MEASURING SPEED OF FLUIDS OR RELATIVE SPEED OF SOLID TO FLUID OR FLUID TO SOLID

G01P 5/00

MEASURING ACCELERATION OR SUDDEN CHANGE OF ACCELERATION

G01P 15/00

DETAILS

G01P 1/00

FUNCTIONAL TESTING OR CALIBRATING

G01P 21/00

Details of instruments

Housings

Special adaptations of driving means

Indicating devices, e.g. for remote indication (indicating working conditions of vehicles G07C 5/00) [3]

Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers

for indicating predetermined speeds

by the detection of the position of the indicator needle [3]

Recording devices (registering working conditions of vehicles G07C 5/00) [3]

for permanent recording [3]

for erasable recording, e.g. magnetic recording [3]

Measuring linear or angular speed; Measuring differences of linear or angular speeds (G01P 5/00 to G01P 11/00 take precedence; counting mechanisms G06M)

Note

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.

Devices characterised by the use of mechanical means

by comparing two speeds

using a friction gear

using differential gearing

by actuating an indicating element, e.g. pointer, for a fixed time

by making use of a system excited by impact

by exciting one or more mechanical resonance systems

by using centrifugal forces of solid masses (governors G05D 13/00)

transferred to the indicator by mechanical means

transferred to the indicator by fluid means

transferred to the indicator by electric or magnetic means

by using friction effects (G01P 3/06 takes precedence)

Devices characterised by the use of fluids

by using pumps

by using centrifugal forces of fluids

in a rotary container communicating with a fixed container

by using friction effects

Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light (G01P 3/68 takes precedence; gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams, G01C 19/64)

using photographic means

using stroboscopic means

Devices characterised by the use of electric or magnetic means (G01P 3/66 takes precedence; measuring electric or magnetic values in general G01R)

for measuring angular speed (G01P 3/56 takes precedence)

by measuring amplitude of generated current or voltage

by measuring frequency of generated current or voltage

481

of pulse signals [3]

482

delivered by nuclear radiation detectors [3]

483

delivered by variable capacitance detectors [3]

484

delivered by contact-making switches [3]

486

delivered by photo-electric detectors [3]

487

delivered by rotating magnets [3]

488

delivered by variable reluctance detectors [3]

489

Digital circuits therefor [3]

using eddy currents

495

where the indicating means responds to forces produced by the eddy currents and the generating magnetic field [3]

for measuring linear speed (G01P 3/56 takes precedence)

by measuring amplitude of generated current or voltage

by measuring frequency of generated current or voltage

for comparing two speeds

by measuring or comparing amplitudes of generated currents or voltages

by measuring or comparing frequency of generated currents or voltages

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)

Devices characterised by the determination of the time taken to traverse a fixed distance

using electric or magnetic means (G01P 3/80 takes precedence; measuring short time intervals G04F) [4]

using optical means, i.e. using infra-red, visible, or ultra-violet light (G01P 3/80 takes precedence) [4]

using auto-correlation or cross-correlation detection means [4]

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)

by using swirlflowmeter [3]

by measuring forces exerted by the fluid on solid bodies, e.g. anemometer

using deflection of baffle-plates

using rotation of vanes (measuring speed of rotating shafts G01P 3/00)

with electrical coupling to the indicating device [3]

by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect

by measuring thermal variables

using variation of resistance of a heated conductor

by measuring differences of pressure in the fluid

using Pitot tubes

165

Arrangements or constructions of Pitot tubes [3]

Coupling arrangements to the indicating device [3]

175

with the determination of Mach number (analogue computers therefor G06G 7/57) [3]

by measuring the time taken by the fluid to traverse a fixed distance [1,7]

using particles entrained by a fluid stream (G01P 5/22 takes precedence) [4]

using auto-correlation or cross-correlation detection means [4]

by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave [7]

by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave [7]

Measuring speed by integrating acceleration (measuring travelled distance by double integration of acceleration G01C 21/16)

Measuring speed by using gyroscopic effect, e.g. using gas, using electron beam (gyroscopes or turn-sensitive devices per se G01C 19/00)

using rotary gyroscopes

using turn-sensitive devices with vibrating masses, e.g. tuning-fork

11/

Measuring average value of speed (by determining time taken to traverse a fixed distance G01P 3/64, G01P 5/18)

11/

Measuring average speed of a number of bodies, e.g. of vehicles for traffic control

13/

Indicating or recording presence, absence, or direction, of movement (counting moving objects G06M 7/00; electric switches H01H)

13/

Indicating direction only, e.g. by weather vane

13/

Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement [3]

15/

Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration

15/

by making use of inertia forces (G01P 15/14, G01P 15/18 take precedence) [1,7]

15/

by using non-electrical means [3]

15/

for indicating maximum value

15/

using members subjected to a permanent deformation

15/

with conversion into electric or magnetic values

15/

by piezo-electric pick-up [3]

15/

093

by photoelectric pick-up [7]

15/

097

by vibratory elements [7]

15/

by vibratory strings

15/

105

by magnetically sensitive devices [7]

15/

by inductive pick-up [3]

15/

by alteration of electrical resistance

15/

125

by capacitive pick-up [3]

15/

by measuring the force required to restore a proofmass subjected to inertial forces to a null position [3]

15/

135

by making use of contacts which are actuated by a movable inertial mass [3]

15/

by making use of gyroscopes (G01P 15/18 takes precedence; gyroscopes per se G01C 19/00) [1,7]

15/

by evaluating the time-derivative of a measured speed signal (G01P 15/18 takes precedence) [3,7]

15/

in two or more dimensions [7]

21/

Testing or calibrating of apparatus or devices covered by the preceding groups

21/

of speedometers