G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCKINDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; 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 G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; 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; measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08GThis 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".Attention is drawn to the Notes following the title of class G01.In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. G01P1/00 G01P1/00Details of instruments G01P1/003used for damping G01P1/006used for thermal compensation G01P1/02Housings G01P1/023for acceleration measuring devices G01P1/026for speed measuring devices, e.g. pulse generator G01P1/04Special adaptations of driving means G01P1/06Indicating or recording devices, e.g. for remote indication indicating or recording in general G01D; registering or indicating working conditions of vehicles G07C5/00 G01P1/07Indicating devices, e.g. for remote indication indicating working conditions of vehicles G07C5/00 G01P1/08Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers G01P1/10for indicating predetermined speeds G01P1/103by comparing the value of the measured signal with one or several reference values in general G01R17/00 G01P1/106by comparing the time duration between two impulses with a reference time G01P1/11by the detection of the position of the indicator needle G01P1/12Recording devices indicating working conditions of vehicles G07C5/00 G01P1/122Speed recorders G01P1/125with recording discs G01P1/127for acceleration values G01P1/14for permanent recording G01P1/125 takes precedence G01P1/16for erasable recording, e.g. magnetic recording G01P3/00Measuring linear or angular speedMeasuring differences of linear or angular speeds G01P5/00 - G01P11/00 take precedence; direction and speed indication G01P13/045; counting mechanisms G06MThe 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. G01P3/02Devices characterised by the use of mechanical means G01P3/04by comparing two speeds G01P3/06using a friction gear G01P3/08using differential gearing G01P3/10by actuating an indicating element, e.g. pointer, for a fixed time G01P3/12by making use of a system excited by impact G01P3/14by exciting one or more mechanical resonance systems G01P3/16by using centrifugal forces of solid masses governors G05D13/10 G01P3/18transferred to the indicator by mechanical means G01P3/20transferred to the indicator by fluid means G01P3/22transferred to the indicator by electric or magnetic means G01P3/24by using friction effects G01P3/06 takes precedence G01P3/26Devices characterised by the use of fluids G01P3/263by using fluidic impulse generators G01P3/266by using a vortex chamber G01P3/28by using pumps G01P3/30by using centrifugal forces of fluids G01P3/32in a rotary container communicating with a fixed container G01P3/34by using friction effects G01P3/36Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light G01P3/68 takes precedence; gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams G01C19/64 G01P3/363by using a ring laser ring lasers in general H01S3/083 G01P3/366by using diffraction of light for measuring speed of fluids G01P5/26 G01P3/38using photographic means G01P3/40using stroboscopic means G01P3/42Devices characterised by the use of electric or magnetic means G01P3/66 takes precedence; measuring electric or magnetic values in general G01R G01P3/44for measuring angular speed G01P3/56 takes precedence G01P3/443mounted in bearings bearings F16C G01P3/446mounted between two axially spaced rows of rolling elements G01P3/46by measuring amplitude of generated current or voltage in general G01R19/00 G01P3/465by using dynamo-electro tachometers or electric generator G01P3/48by measuring frequency of generated current or voltage in general G01R23/00 G01P3/4802by using electronic circuits in general G01P3/4805by using circuits for the electrical integration of the generated pulses measuring impulse frequency by integration G01R23/09 G01P3/4807by using circuits for the detection of the pulses delivered by the ignition system of an internal combustion engine G01P3/481of pulse signals G01P3/4815using a pulse wire sensor, e.g. Wiegand wire G01P3/482delivered by nuclear radiation detectors G01P3/483delivered by variable capacitance detectors G01P3/484delivered by contact-making switches G01P3/486delivered by photo-electric detectors G01P3/487delivered by rotating magnets G01P3/488delivered by variable reluctance detectors G01P3/489Digital circuits therefor G01P3/49using eddy currents G01P3/495where the indicating means responds to forces produced by the eddy currents and the generating magnetic field G01P3/4953with a counter for the covered distance incorporated measuring the covered distance G01C22/00 G01P3/4956with thermal compensation G01P3/50for measuring linear speed G01P3/56 takes precedence G01P3/505by using eddy currents G01P3/52by measuring amplitude of generated current or voltage G01P3/54by measuring frequency of generated current or voltage G01P3/56for comparing two speeds G01P3/565by measuring or by comparing the phase of generated current or voltage phase comparators per se H03D13/00; phase measurement G01R25/00 G01P3/58by measuring or comparing amplitudes of generated currents or voltage amplitude comparators H03K5/24 G01P3/60by measuring or comparing frequency of generated currents or voltages frequency comparators H03K5/26 G01P3/62Devices characterised by the determination or the variation of atmospheric pressure with height to measure the vertical components of speed measuring pressure in general G01L G01P3/64Devices characterised by the determination of the time taken to traverse a fixed distance G01P3/66using electric or magnetic means G01P3/80 takes precedence; measuring short time intervals G04F8/00, G04F10/00 G01P3/665for projectile velocity measurements G01P3/68using optical means, i.e. using infra-red, visible, or ultra-violet light G01P3/80 takes precedence ; by reflection of waves G01S17/58 G01P3/685for projectile velocity measurements G01P3/80using auto-correlation or cross-correlation detection means G01P3/803in devices of the type to be classified in G01P3/66 G01P3/806in devices of the type to be classified in G01P3/68 G01P5/00Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft application of speed-measuring devices for measuring volume of fluid G01F G01P5/001Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation G01P5/003by measuring fluid level in front of an obstacle G01P5/005by using a jet directed into the fluid G01P5/006the jet used is composed of ionised or radioactive particles G01P5/008by using an electrolyte added to the fluid G01P5/01by using swirlflowmeter G01P5/02by measuring forces exerted by the fluid on solid bodies, e.g. anemometer G01P5/04using deflection of baffle-plates G01P5/06using rotation of vanes measuring speed of rotating shafts G01P3/00 G01P5/065with mechanical coupling to the indicating device G01P5/07with electrical coupling to the indicating device G01P5/08by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect G01P5/083by using electronic circuits for measuring the dynamoelectric effect G01P5/086by using special arrangements and constructions for measuring the dynamo-electric effect G01P5/10by measuring thermal variables G01P5/12using variation of resistance of a heated conductor G01P5/14by measuring differences of pressure in the fluid G01P5/16using Pitot tubes , e.g. Machmeter G01P5/165Arrangements or constructions of Pitot tubes G01P5/17Coupling arrangements to the indicating device G01P5/175with the determination of Mach number analogue computers therefor G06G7/57 G01P5/18by measuring the time taken to traverse a fixed distance G01P5/20using particles entrained by a fluid stream G01P5/22 takes precedence G01P5/22using auto-correlation or cross-correlation detection means G01P5/24by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave G01P5/241by using reflection of acoustical waves, i.e. Doppler-effect G01P5/242involving continuous, e.g. modulated or unmodulated, waves G01P5/244 takes precedence G01P5/244involving pulsed waves G01P5/245by measuring transit time of acoustical waves measuring propagation velocity of acoustical waves per se G01H5/00 G01P5/247Sing-around-systems G01P5/248by measuring phase differences G01P5/26by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave G01P7/00Measuring speed by integrating acceleration measuring travelled distance by double integration of acceleration G01C21/16 G01P9/00Measuring speed by using gyroscopic effect, e.g. using gas, using electron beam gyroscopes or turn-sensitive devices per se G01C19/00
Absolute angular speed sensors are classified under G01C19/00 and s.gr.Group G01P9/00 is no longer used for the classification of documents as of 2022-01-01. The content of this group is being reclassified into groups G01C19/005, G01C19/065, G01C21/16, G01C21/165, G01C21/1652, G01C21/1654, G01C21/1656, G01C21/166, G01C21/18, G01C21/183, G01C21/185 and G01C21/188.
All groups listed in this Warning should be considered in order to perform a complete search. G01P9/02using rotary gyroscopesGroup G01P9/02 is no longer used for the classification of documents as of 2022-01-01. The content of this group is being reclassified into groups G01C19/005, G01C19/02, G01C19/025, G01C19/04, G01C19/06, G01C19/065, G01C19/08, G01C19/10, G01C19/12, G01C19/14, G01C19/16, G01C19/18, G01C19/20, G01C19/22, G01C19/24, G01C19/26, G01C19/28, G01C19/30, G01C19/32, G01C19/34, G01C19/36, G01C19/38, G01C19/40, G01C19/42, G01C19/44, G01C19/46, G01C19/48, G01C19/50, G01C19/52, G01C19/54, G01C21/16, G01C21/165, G01C21/1652, G01C21/1654, G01C21/1656, G01C21/166, G01C21/18, G01C21/183, G01C21/185 and G01C21/188.
All groups listed in this Warning should be considered in order to perform a complete search. G01P9/04using turn-sensitive devices with vibrating masses, e.g. tuning-forkGroup G01P9/04 is no longer used for the classification of documents as of 2022-01-01. The content of this group is being reclassified into groups G01C19/005, G01C19/56, G01C19/5607, G01C19/5614, G01C19/5621, G01C19/5628, G01C19/5635, G01C19/5642, G01C19/5649, G01C19/5656, G01C19/5663, G01C19/567, G01C19/5677, G01C19/5684, G01C19/5691, G01C19/5698, G01C19/5705, G01C19/5712, G01C19/5719, G01C19/5726, G01C19/5733, G01C19/574, G01C19/5747, G01C19/5755, G01C19/5762, G01C19/5769, G01C19/5776, G01C19/5783, G01C21/16, G01C21/165, G01C21/1652, G01C21/1654, G01C21/1656, G01C21/166, G01C21/18, G01C21/183, G01C21/185 and G01C21/188.
All groups listed in this Warning should be considered in order to perform a complete search. G01P11/00Measuring average value of speed by determining time taken to traverse a fixed distance G01P3/64, G01P5/18 G01P11/02Measuring average speed of number of bodies, e.g. of vehicles for traffic control G01P13/00Indicating or recording presence, absence, or direction, of movement electric switches H01H; counting moving objects G06M7/00 G01P13/0006of fluids or of granulous or powder-like substances G01P13/0013by using a solid body which is shifted by the action of the fluid G01P13/002with electrical coupling to the indicating devices G01P13/0026by using deflection of baffle-plates G01P13/0033with electrical coupling to the indicating device G01P13/004by using the rotation of vanes G01P13/0046with electrical coupling to the indicating device G01P13/0053by using dynamo-electric effect G01P13/006by using thermal variables G01P13/0066by using differences of pressure in the fluid G01P13/0073by using vibrations generated by the fluid G01P13/008by using a window mounted in the fluid carrying tube G01P13/0013, G01P13/0026, G01P13/004 take precedence G01P13/0086with photo-electric detection G01P13/0093by making use of products, e.g. chemical products added to the fluid in order to make the fluid flow visible G01P13/02Indicating direction only, e.g. by weather vane G01P13/025indicating air data, i.e. flight variables of an aircraft, e.g. angle of attack, side slip, shear, yaw G01P13/04Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement G01P13/045with speed indication G01P15/00Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration G01P15/001by measuring acceleration changes by making use of a triple differentiation of a displacement signal G01P15/003Kinematic accelerometers, i.e. measuring acceleration in relation to an external reference frame, e.g. Ferratis accelerometers G01P15/001, G01P15/16, G01P15/165 take precedence G01P15/005measuring translational acceleration G01P15/006by making use of fluid seismic masses G01P15/008by using thermal pick-up G01P15/02by making use of inertia forces using solid seismic massesG01P15/14 takes precedence G01P15/03by using non-electrical means G01P15/032by measuring the displacement of a movable inertial mass G01P15/034for indicating angular accelerations G01P15/036 takes precedence G01P15/036for indicating predetermined acceleration values G01P15/038by using fluidic means G01P15/04for indicating maximum value G01P15/06using members subjected to a permanent deformation G01P15/08with conversion into electric or magnetic values G01P15/0802Details G01P2015/0805being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration G01P2015/0808for defining in-plane movement of the mass, i.e. movement of the mass in the plane of the substrate G01P2015/0811for one single degree of freedom of movement of the mass G01P2015/0814for translational movement of the mass, e.g. shuttle type G01P2015/0817for pivoting movement of the mass, e.g. in-plane pendulum G01P2015/082for two degrees of freedom of movement of a single mass G01P2015/0822for defining out-of-plane movement of the mass G01P2015/0825for one single degree of freedom of movement of the mass G01P2015/0828the mass being of the paddle type being suspended at one of its longitudinal ends G01P2015/0831the mass being of the paddle type having the pivot axis between the longitudinal ends of the mass, e.g. see-saw configuration G01P2015/0834the mass constituting a pendulum having the pivot axis disposed symmetrically between the longitudinal ends, the center of mass being shifted away from the plane of the pendulum which includes the pivot axis G01P2015/0837the mass being suspended so as to only allow movement perpendicular to the plane of the substrate, i.e. z-axis sensor G01P2015/084the mass being suspended at more than one of its sides, e.g. membrane-type suspension, so as to permit multi-axis movement of the mass G01P2015/0842the mass being of clover leaf shape G01P2015/0845using a plurality of spring-mass systems being arranged on one common planar substrate, the systems not being mechanically coupled and the sensitive direction of each system being different G01P2015/0848using a plurality of mechanically coupled spring-mass systems, the sensitive direction of each system being different G01P2015/0851using a plurality of spring-mass systems, each system having a different range of sensitivity to acceleration G01P2015/0854using a particular shape of the mass, e.g. annular G01P2015/0857using a particular shape of the suspension spring G01P2015/086using a torsional suspension spring G01P2015/0862being provided with particular means being integrated into a MEMS accelerometer structure for providing particular additional functionalities to those of a spring mass system G01P2015/0865using integrated signal processing circuitry G01P2015/0868using self-test structures integrated into the microstructure G01P2015/0871using stopper structures for limiting the travel of the seismic mass G01P2015/0874using means for preventing stiction of the seismic mass to the substrate G01P2015/0877using integrated interconnect structures G01P2015/088for providing wafer-level encapsulation G01P2015/0882for providing damping of vibrations G01P15/0885by magnetostrictive pick-up G01P15/0888for indicating angular acceleration G01P15/0891with indication of predetermined acceleration values G01P15/135 takes precedence G01P15/0894by non-contact electron transfer, i.e. electron tunneling G01P15/0897by thermal pick-up G01P15/008 takes precedence G01P15/09by piezo-electric pick-up G01P15/0907of the compression mode type G01P15/0915of the shear mode type G01P15/0922of the bending or flexing mode type G01P15/093by photoelectric pick-up G01P15/097by vibratory elements G01P15/0975by acoustic surface wave resonators or delay lines G01P15/10by vibratory strings G01P15/105by magnetically sensitive devices G01P15/11by inductive pick-up G01P15/12by alteration of electrical resistance G01P15/0897, G01P15/105 take precedence G01P15/121by potentiometers G01P15/122by metal resistance strain gauges, e.g. wire resistance strain gauges G01P15/123by piezo-resistive elements, e.g. semiconductor strain gauges G01P15/124by semiconductor devices comprising at least one PN junction, e.g. transistors G01P15/125by capacitive pick-up G01P15/13by measuring the force required to restore a proofmass subjected to inertial forces to a null position G01P15/131with electrostatic counterbalancing means G01P15/132with electromagnetic counterbalancing means G01P15/133with piezo-electric counterbalancing means G01P15/135by making use of contacts which are actuated by a movable inertial mass G01P15/14by making use of gyroscopes gyroscopes per se G01C19/00 G01P15/16by evaluating the time-derivative of a measured speed signal G01P15/165for measuring angular accelerations G01P15/18in two or more dimensions G01P21/00Testing or calibrating of apparatus or devices covered by the preceding groups G01P21/02of speedometers G01P21/025for measuring speed of fluids; for measuring speed of bodies relative to fluids for measuring volume flow G01F25/10