| Patents for G01P 21 - Testing or calibrating of apparatus or devices covered by the other groups of this subclass (4,237) |
|---|
| 06/02/1992 | US5117681 Correction of systematic position-sensing errors in internal combustion engines |
| 05/27/1992 | EP0487279A2 Gas damping control assembly for deceleration switch |
| 05/27/1992 | EP0386035B1 Device for performance testing of acceleration sensors |
| 05/26/1992 | US5116119 Method and apparatus for measuring liquid flow |
| 05/21/1992 | DE4128230A1 Circuit for vehicle mounted arrangement - integrates acceleration signal twice to produce displacement signal, and adds weighted acceleration and speed signals |
| 05/19/1992 | US5115238 Calibration apparatus of angular velocity sensor in self-contained navigational system |
| 05/13/1992 | EP0485348A2 Portable apparatus for calibrating motor-vehicle chronotachographs |
| 05/03/1992 | CA2053559A1 Shock sensor |
| 04/28/1992 | US5109143 Gas damping control assembly for deceleration switch |
| 04/14/1992 | US5103667 Self-testable micro-accelerometer and method |
| 03/31/1992 | US5101155 Rotational speed measurement with frequency-dependent voltage compensation |
| 03/11/1992 | EP0474352A1 Quick-response accelerometer |
| 03/10/1992 | US5094246 Hot wire anemometer and pulmonary gas flow monitor combination capable of fast accurate calibration |
| 03/06/1992 | CA2048105A1 Quick-response accelerometer |
| 03/04/1992 | EP0472877A1 Apparatus to determine the rotational speed of an internal combustion engine |
| 01/02/1992 | EP0463305A2 Procedure for correcting wheel rotation speed delivered by wheel sensors |
| 01/02/1992 | EP0391943B1 Process for correcting the speed of rotation of vehicle wheels determined by wheel sensors |
| 12/31/1991 | US5076099 Zero point compensating circuit |
| 12/19/1991 | DE4115329A1 Inertial sensor for motor vehicle safety appts. - has resistive tracks coupled to diagnostic circuit to control trigger of external device e.g. inflatable cushion |
| 12/18/1991 | EP0461265A1 Acceleration sensors |
| 12/12/1991 | WO1991019200A1 Generalized rotary shock and impact testing machine |
| 12/04/1991 | EP0459274A2 Method of monitoring the revolution sensors of an automotive vehicles' drive train |
| 11/27/1991 | EP0458025A1 Method for determining a derived number of revolutions corresponding to the average rear wheel speed of a motor vehicle |
| 11/06/1991 | EP0455270A2 Magnetically-damped, testable accelerometer |
| 10/29/1991 | US5060504 Self-calibrating accelerometer |
| 10/16/1991 | EP0220206B1 Process for the monitoring of a speed transmitter signal |
| 09/25/1991 | EP0447811A1 Flow monitoring and measuring device |
| 09/25/1991 | EP0447560A1 Impact sensor |
| 09/24/1991 | US5051578 Self calibrating fiber optic sensor system with optimized throughput |
| 09/19/1991 | DE4028780A1 Flowmeter using impeller wheel - has exchangeable nozzle plate of predetermined bore or port in inlet and/or outlet channel |
| 09/17/1991 | US5048319 Method for calibrating an acceleration sensor |
| 09/04/1991 | EP0444866A1 Control system for vehicle safety device |
| 09/04/1991 | EP0277217B1 Spacecraft accelerometer auto-alignment |
| 08/20/1991 | US5040407 Speedometer/odometer/cruise control tester and related methods |
| 08/14/1991 | EP0440916A1 Circuitry for the processing of signals from a vehicle wheel speed sensor |
| 08/08/1991 | WO1991011757A1 Control system |
| 08/08/1991 | WO1991011722A1 An arrangement in a semiconductor accelerometer |
| 08/01/1991 | DE4002549A1 Signal processing circuit for motor vehicle wheel speed sensors - has differential field plated measurement sensor raises connected into measurement bridge with amplifier providing offset compensation |
| 07/30/1991 | US5036304 Rolamite sensor |
| 07/23/1991 | US5033285 Apparatus for calibrating transducers |
| 07/11/1991 | WO1991010118A1 Apparatus for detecting physical quantity that acts as external force and method of testing and producing this apparatus |
| 07/02/1991 | US5027647 Sensor malfunction diagnostic system for automatic automotive transmission |
| 07/02/1991 | US5027640 Speedometer/odometer/cruise control tester and related methods |
| 06/27/1991 | WO1991009315A1 Signal processing circuits |
| 06/20/1991 | DE3941606A1 Sensor triggering restraining system esp. air-bag in motor vehicle - has electronic power switch detecting acceleration and requiring no external power source |
| 06/15/1991 | CA2032024A1 Speed sensor gap fault-detection arrangement for multiple-axle rail vehicles |
| 05/28/1991 | US5020008 Method of calibrating vehicle speed signals |
| 05/21/1991 | US5018087 Programming signal source and calibration data for a speedometer/tachometer with calibration switches |
| 04/24/1991 | EP0423903A2 Spectral modulation sensor having an optically resonant structure and optical measuring devices using the same |
| 04/24/1991 | EP0423622A1 Detector having self-calibration function |
| 04/17/1991 | EP0379574A4 Compact crash sensing switch with air channels and diagnostic system |
| 04/11/1991 | DE4027046A1 Acceleration sensor functional test and/or calibration - using electromagnet with soft iron pot core mounted on sensor housing |
| 04/10/1991 | EP0421585A2 Zero point offset compensating circuit |
| 04/07/1991 | WO1991005266A1 Impact sensor |
| 04/07/1991 | CA2039145A1 Impact sensor |
| 04/03/1991 | EP0420070A1 Malfunction detector for acceleration sensor |
| 03/28/1991 | DE3931050A1 Testing appts. for acceleration sensors - uses electromagnet to impact sliding carriage holding sensor to desired acceleration value |
| 03/26/1991 | US5003190 Acceleration pickup, especially for release of occupant protecting devices in the event of accident |
| 03/20/1991 | EP0417423A2 Circuit for the determination of the rotational speed of a wheel |
| 03/19/1991 | US5000030 Method and apparatus for measuring dynamic response characteristics of shock accelerometer |
| 03/13/1991 | EP0415943A1 Sensor for measuring a motional parameter, in particular crash sensor for a motor vehicle |
| 02/21/1991 | DE4022697A1 Pressure or acceleration sensor esp. for vehicle engine control - has simple detector with signal processing, contg. sensor characteristic adjustment mechanism |
| 02/14/1991 | DE3926589A1 Speedometer adjuster compensating for wear of wheels - uses probe for continuously ascertaining distance to running surface esp. of railway locomotive wheel |
| 02/07/1991 | DE3925829A1 Regulation and control device e.g. for anti-lock braking system - detects slow sensor deterioration by periodic comparison of actual and stored signal amplitudes |
| 01/31/1991 | DE3923723A1 Display device for drop and shock-sensitive equipment - has magnet on flexible spring activating electrical contact when displaced from rest position |
| 01/29/1991 | US4987781 Accelerometer chip |
| 01/17/1991 | DE4015960A1 Very safe operation method for vehicle - involves repeated sensor functionality checks with special checking of sensors with ambiguous min. failure signal levels |
| 01/15/1991 | US4984455 System for detecting speed of engine for vehicle |
| 12/25/1990 | US4980526 Device and method for testing acceleration shock sensors |
| 12/13/1990 | WO1990015337A1 Method of calibrating vehicle speed signals |
| 12/13/1990 | DE3918407A1 Piezoelectric acceleration sensor esp. for safety devices - has switched capacitor between transducer and integrator to eliminate high impedance resistors |
| 12/06/1990 | DE3918150A1 Eddy current revolution counter serving as tachometer - has at least one drive element of drive chain between magnetic shaft and distance counter exchangeably mounted |
| 12/05/1990 | CN1010710B Automatic calibration for accelerometer of spacecraft |
| 11/20/1990 | US4972145 Speed sensor gap fault-detection arrangement for multiple-axle rail vehicles |
| 11/13/1990 | US4969695 Detection of abnormality for rotational speed sensor |
| 11/07/1990 | EP0396265A2 Air bag firing circuit |
| 10/17/1990 | EP0391943A1 Process for correcting the speed of rotation of vehicle wheels determined by wheel sensors. |
| 10/10/1990 | EP0391647A2 Calibration apparatus of angular velocity sensor in self-contained navigational system |
| 10/10/1990 | EP0391227A2 Acceleration or deceleration sensor |
| 10/06/1990 | CA2012997A1 Device and method for testing acceleration shock sensors |
| 09/25/1990 | US4958851 Air bag firing circuit |
| 09/19/1990 | EP0387384A1 Method for determining a corrected value of the wheel speed of a vehicle |
| 09/12/1990 | EP0386942A2 Accelerometer with dualmagnet sensing mass |
| 09/09/1990 | CA2010625A1 Accelerometer with dual-magnet sensing mass |
| 08/28/1990 | US4951507 Gas rate sensor |
| 08/21/1990 | US4950915 Impact sensor with a testing circuit for a vehicle |
| 08/21/1990 | US4950914 Collision detection system for a vehicle |
| 08/07/1990 | US4947325 Diagnostic system for rotational speed sensors in drive train of four wheels drive vehicle having central differential device |
| 08/07/1990 | US4945753 Apparatus and process for automatically calibrating locomotive speedometers as wheel size varies |
| 08/01/1990 | EP0379574A1 Compact crash sensing switch with air channels and diagnostic system |
| 06/26/1990 | US4937530 Apparatus for monitoring phase voltages of a polyphase tachometer generator to detect phase failures |
| 06/12/1990 | US4933515 Accelerometer with dual-magnet sensing mass |
| 06/05/1990 | US4930362 Transducer tester system |
| 05/22/1990 | US4928242 Vehicle speed sensor abnormality detection device |
| 05/22/1990 | US4926683 Method of testing a set of wheel speed sensors forming parts of an anti-lock brake control system |
| 05/16/1990 | EP0368446A2 Self-calibrating accelerometer |
| 05/16/1990 | EP0368434A2 Magnetically-damped, testable accelerometer |
| 04/18/1990 | EP0364088A2 Wheel diameter calibration for a railway vehicle |
| 04/05/1990 | DE3832518A1 Method and device for detecting an error in a signal corresponding to the speed of a vehicle |
| 04/03/1990 | US4914263 Magnetically-damped, testable accelerometer |