G:	PHYSICS
G01:	MEASURING (counting G06M); TESTING
G01P:	MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
G01P1/00:	Details of instruments
G01P1/00B:	. used for damping
G01P1/00C:	. used for thermal compensation
G01P1/02:	. Housings
G01P1/02B:	. . for acceleration measuring devices
G01P1/02C:	. . for speed measuring devices, e.g. pulse generator
G01P1/04:	. Special adaptations of driving means
G01P1/06:	. IPC 2 Indicating or recording devices, e.g. for remote indication indicating or recording in general G01D; registering or indicating working conditions of vehicles G07C5/00
G01P1/07:	. indicating devices, e.g. for remote indication
G01P1/08:	. . Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
G01P1/10:	. . . for indicating predetermined speeds
G01P1/10C:	. . . . by comparing the value of the measured signal with one or several reference values in general G01R17/00
G01P1/10D:	. . . . by comparing the time duration between two impulses with a reference time
G01P1/11:	. . . . by the detection of the position of the indicator needle
G01P1/12:	. Recording devices
G01P1/12B:	. . Speed recorders
G01P1/12B2:	. . . with recording discs
G01P1/12C:	. . for acceleration values
G01P1/14:	. . for permanent recording G01P1/12B2 takes precedence
G01P1/16:	. . for erasable recording, e.g. magnetic recording
G01P3/00:	Measuring linear or angular speed; Measuring differences of linear or angular speeds
G01P3/02:	. Devices characterised by the use of mechanical means
G01P3/04:	. . by comparing two speeds
G01P3/06:	. . . using a friction gear
G01P3/08:	. . . using differential gearing
G01P3/10:	. . by actuating an indicating element, e.g. pointer, for a fixed time
G01P3/12:	. . by making use of a system excited by impact
G01P3/14:	. . by exciting one or more mechanical resonance systems
G01P3/16:	. . by using centrifugal forces of solid masses governors G05D13/10
G01P3/18:	. . . transferred to the indicator by mechanical means
G01P3/20:	. . . transferred to the indicator by fluid means
G01P3/22:	. . . transferred to the indicator by electric or magnetic means
G01P3/24:	. . by using friction effects
G01P3/26:	. Devices characterised by the use of fluids
G01P3/26B:	. . by using fluidic impulse generators
G01P3/26C:	. . by using a vortex chamber
G01P3/28:	. . by using pumps
G01P3/30:	. . by using centrifugal forces of fluids
G01P3/32:	. . . in a rotary container communicating with a fixed container
G01P3/34:	. . by using friction effects
G01P3/36:	. Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light
G01P3/36B:	. . by using a ring laser ring lasers in general H01S3/083
G01P3/36C:	. . by using diffraction of light for measuring speed of fluids G01P5/26
G01P3/38:	. . using photographic means
G01P3/40:	. . using stroboscopic means
G01P3/42:	. Devices characterised by the use of electric or magnetic means
G01P3/44:	. . for measuring angular speed
G01P3/44B:	. . . mounted in bearings bearings F16C
G01P3/44B2:	. . . . mounted between two axially spaced rows of rolling elements
G01P3/46:	. . . by measuring amplitude of generated current or voltage in general G01R19/00
G01P3/46B:	. . . . by using dynamo-electro tachometers or electric generator
G01P3/48:	. . . by measuring frequency of generated current of voltage in general G01R23/00
G01P3/481:	. . . . of pulse signals
G01P3/481W:	. . . . . using a pulse wire sensor, e.g. Wiegand wire
G01P3/482:	. . . . . delivered by nuclear radiation detectors
G01P3/483:	. . . . . delivered by variable capacitance detectors
G01P3/484:	. . . . . delivered by contact-making switches
G01P3/486:	. . . . . delivered by photo-electric detectors
G01P3/487:	. . . . . delivered by rotating magnets
G01P3/488:	. . . . . delivered by variable reluctance detectors
G01P3/489:	. . . . . Digital circuits therefor
G01P3/48C:	. . . . by using electronic circuits in general
G01P3/48C2:	. . . . . by using circuits for the electrical integration of the generated pulses measuring impulse frequency by integration G01R23/09
G01P3/48C3:	. . . . . by using circuits for the detection of the pulses delivered by the ignition system of an internal combustion engine
G01P3/49:	. . . using eddy currents
G01P3/495:	. . . . where the indicating means responds to forces produced by the eddy currents and the generating magnetic field
G01P3/495B:	. . . . . with a counter for the covered distance incorporated measuring the covered distance G01C22/00
G01P3/495C:	. . . . . with thermal compensation
G01P3/50:	. . for measuring linear speed
G01P3/50B:	. . . by using eddy currents
G01P3/52:	. . . by measuring amplitude of generated current or voltage
G01P3/54:	. . . by measuring frequency of generated current or voltage
G01P3/56:	. . for comparing two speeds
G01P3/56B:	. . . by measuring or by comparing the phase of generated current or voltage phase comparators per se H03D 13/00; phase measurement G01R25/00
G01P3/58:	. . . by measuring or comparing amplitudes of generated currents or voltage amplitude comparators H03K5/24
G01P3/60:	. . . by measuring or comparing frequency of generated currents or voltages frequency comparators H03K5/26
G01P3/62:	. Devices characterised by the determination or the variation of atmospheric pressure with height to measure the vertical components of speed
G01P3/64:	. Devices characterised by the determination of the time taken to traverse a fixed distance
G01P3/66:	. . using electric or magnetic means
G01P3/66B:	. . . for projectile velocity measurements
G01P3/68:	. . using optical means, i.e. using infra-red, visible, or ultra-violet light
G01P3/68B:	. . . for projectile velocity measurements
G01P3/80:	. . using auto-correlation or cross-correlation detection means
G01P3/80B:	. . . in devices of the type to be classified in G01P3/66
G01P3/80C:	. . . in devices of the type to be classified in G01P3/68
G01P5/00:	Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
G01P5/00A:	. Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation
G01P5/00C:	. by measuring fluid level in front of an obstacle
G01P5/00E:	. by using a jet directed into the fluid
G01P5/00E1:	. . the jet used is composed of ionised or radioactive particles
G01P5/00H:	. by using an electrolyte added to the fluid
G01P5/01:	. by using swirlflowmeter
G01P5/02:	. by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
G01P5/04:	. . using deflection of baffle-plates
G01P5/06:	. . using rotation of vanes
G01P5/06B:	. . . with mechanical coupling to the indicating device
G01P5/07:	. . . with electrical coupling to the indicating device
G01P5/08:	. by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
G01P5/08B:	. . by using electronic circuits for measuring the dynamoelectric effect
G01P5/08C:	. . by using special arrangements and constructions for measuring the dynamo-electric effect
G01P5/10:	. by measuring thermal variables
G01P5/12:	. . using variation of resistance of a heated conductor
G01P5/14:	. by measuring differences of pressure in the fluid
G01P5/16:	. . using Pitot tubes, e.g. Machmeter
G01P5/165:	. . . Arrangements or constructions of Pitot tubes
G01P5/17:	. . . Coupling arrangements to the indicating device
G01P5/175:	. . . . with the determination of Mach number
G01P5/18:	. by measuring the time taken to traverse a fixed distance
G01P5/20:	. . using particles entrained by a fluid stream
G01P5/22:	. . using auto-correlation or cross-correlation detection means
G01P5/24:	. by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
G01P5/24R:	. . by using reflection of acoustical waves, i.e. Doppler-effect
G01P5/24R2:	. . . involving continuous, e.g. modulated or unmodulated, waves G01P5/24R4 takes precedence
G01P5/24R4:	. . . involving pulsed waves
G01P5/24T:	. . by measuring transit time of acoustical waves measuring propagation velocity of acoustical waves per se G01H5/00
G01P5/24T2:	. . . Sing-around-systems
G01P5/24T4:	. . . by measuring phase differences
G01P5/26:	. by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
G01P7/00:	Measuring speed by integrating acceleration
G01P9/00:	Measuring speed by using gyroscopic effect, e.g. using gas, using electron beam
G01P9/02:	. using rotary gyroscopes
G01P9/04:	. using turn-sensitive devices with vibrating masses, e.g. tuning-fork
G01P11/00:	Measuring average value of speed
G01P11/02:	. Measuring average speed of number of bodies, e.g. of vehicles for traffic control
G01P13/00:	Indicating or recording presence, absence, or direction, of movement
G01P13/00B:	. of fluids or of granulous or powder-like substances
G01P13/00B10:	. . by using thermal variables
G01P13/00B14:	. . by using differences of pressure in the fluid
G01P13/00B2:	. . by using a solid body which is shifted by the action of the fluid
G01P13/00B22:	. . by using vibrations generated by the fluid
G01P13/00B2A:	. . . with electrical coupling to the indicating devices
G01P13/00B4:	. . by using deflection of baffle-plates
G01P13/00B4A:	. . . with electrical coupling to the indicating device
G01P13/00B6:	. . by using the rotation of vanes
G01P13/00B6A:	. . . with electrical coupling to the indicating device
G01P13/00B8:	. . by using dynamo-electric effect
G01P13/00C:	. by using a window mounted in the fluid carrying tube G01P13/00B2, G01P13/00B4, G01P13/00B6 take precedence
G01P13/00C2:	. . with photo-electric detection
G01P13/00D:	. by making use of products, e.g. chemical products added to the fluid in order to make the fluid flow visible
G01P13/02:	. Indicating direction only, e.g. by weather vane
G01P13/02A:	. . indicating air data, i.e. flight variables of an aircraft, e.g. angle of attack, side slip, shear, yaw
G01P13/04:	. . Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
G01P13/04B:	. . . with speed indication
G01P15/00:	Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
G01P15/00C:	. by measuring acceleration changes by making use of a triple differentiation of a displacement signal
G01P15/00N:	. Kinematic accelerometers, i.e. measuring acceleration in relation to an external reference frame, e.g. Ferratis accelerometers G01P15/00C, G01P15/16, G01P15/16B take precedence
G01P15/00N4:	. . measuring translational acceleration
G01P15/00R:	. by making use of fluid seismic masses
G01P15/00R4:	. . by using thermal pick-up
G01P15/10B:	. . . . . by vibratory strings
G01P15/02:	. by making use of inertia forces using solid seismic masses
G01P15/03:	. . by using non-electrical means
G01P15/03B:	. . . by measuring the displacement of a movable inertial mass
G01P15/03B2:	. . . . for indicating angular accelerations G01P15/03B3 takes precedence
G01P15/03B3:	. . . . for indicating predetermined acceleration values
G01P15/03C:	. . . by using fluidic means
G01P15/04:	. . for indicating maximum value
G01P15/06:	. . . using members subjected to a permanent deformation
G01P15/08:	. . with conversion into electric or magnetic values
G01P15/08A:	. . . Details
G01P15/08F:	. . . by magnetostrictive pick-up
G01P15/08K:	. . . for indicating angular acceleration
G01P15/08L:	. . . with indication of predetermined acceleration values G01P15/135 takes precedence
G01P15/08N:	. . . by non-contact electron transfer, i.e. electron tunneling
G01P15/08T:	. . . by thermal pick-up G01P15/00R4 takes precedence
G01P15/09:	. . . by piezo-electric pick-up
G01P15/093:	. . . by photo-electric pick-up
G01P15/097:	. . . by vibratory elements
G01P15/097C:	. . . . by acoustic surface wave resonators or delay lines
G01P15/09B:	. . . . of the compression mode type
G01P15/09C:	. . . . of the shear mode type
G01P15/09D:	. . . . of the bending or flexing mode type
G01P15/10:	. . . . by vibratory strings
G01P15/105:	. . . by magnetically sensitive devices
G01P15/11:	. . . by inductive pick-up
G01P15/12:	. . . by alteration of electrical resistance (G01P15/08T, G01P15/105 take precedence)
G01P15/125:	. . . by capacitive pick-up
G01P15/12B:	. . . . by potentiometers
G01P15/12C:	. . . . by metal resistance strain gauges, e.g. wire resistance strain gauges
G01P15/12D:	. . . . by piezo-resistive elements, e.g. semiconductor strain gauges
G01P15/12E:	. . . . by semiconductor devices comprising at least one PN junction, e.g. transistors
G01P15/13:	. . . by measuring the force required to restore a proofmass subjected to inertial forces to a null position
G01P15/135:	. . . by making use of contacts which are actuated by a movable inertial mass
G01P15/13B:	. . . . with electrostatic counterbalancing means
G01P15/13C:	. . . . with electromagnetic counterbalancing means
G01P15/13D:	. . . . with piezo-electric counterbalancing means
G01P15/14:	. by making use of gyroscopes
G01P15/16:	. by evaluating the time-derivative of a measured speed signal
G01P15/16B:	. . for measuring angular accelerations
G01P15/18:	. in two or more dimensions
G01P21/00:	Testing or calibrating of apparatus of devices covered by the preceding groups
G01P21/02:	. of speedometers
G01P21/02B:	. . for measuring speed of fluids; for measuring speed of bodies relative to fluids for measuring volume flow G01F25/00A