US5463373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for verifying disturbances in signal transmission in motor vehicles
Assignee: Digital Kienzle Computersysteme GmbH and Co KG
•
Filing: 1993-01-26
•
Granted: 1995-10-31
•
Expires: 2013-01-26
Abstract
Abstract A device is disclosed which can detect and document tampering in the signal transmission path between speed measurement and/or mileage counting devices and the speed transmitters which are associated with these devices using the simplest possible means and so as to be suitable for large-scale series manufacture. The device provides that at least one movement transmitter, which senses forces which are typical of driving, is arranged inside the respective measurement device, and that an evaluating circuit is also provided, which delivers a signal which controls a recording arrangement when signals of a speed transmitter do not correspond with those of the movement transmitter.
Inventors
- 👤 Gerhard Widl
- 👤 Manfred Fichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
G; G07; G07C; G07C5/00; G07C5/08; G07C5/0841; G01; G01P; G01P13/00; G07B; G07B13/00; G07B13/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
308 words
A device for verifying disturbances in signal transmission in motor vehicles, particularly the signal transmission between speed measurement and/or mileage counter devices and speed transmitters which are arranged external to said devices, which comprises: a speed transmitter; at least one movement transmitter; a recording arrangement; a measurement device associated with said at least one movement transmitter; and an evaluating circuit, wherein said at least one movement transmitter senses forces which are typical of driving, and further wherein said at least one movement transmitter is arranged inside said measurement device associated therewith, and further wherein said evaluating circuit supplies a disturbance signal which controls said recording arrangement when signals of said speed transmitter do not correspond with signals of said movement transmitter, wherein said evaluating circuit supplies a disturbance signal when a pulse of said at least one movement transmitter, which is stored in said evaluating circuit, is not canceled by a pulse of said speed transmitter after a determined period of time so as to verify a disruption of signals from said speed transmitter, wherein said evalating circuit further comprises: a flip-flop stage the set input of which is associated with said at least one movement transmitter and the reset input of which is connected with a signal input of said speed transmitter, wherein a timer is provided which is controllable by pulses of said movement transmitter, and further wherein an output of said movement transmitter is linked with an output of said flip-flop stage via an AND operation, wherein said device further comprises: a frequency transformer, wherein said frequency transformer is connected to said reset input of said flip-flop stage, and further wherein said frequency transformer has a pitch ratio such that pulse pauses associated therewith are shorter than a switching period of said timer at an output of said frequency transformer at a low driving speed.
Claim 2
Independent Claim
308 words
A device for verifying disturbances in signal transmission in motor vehicles, particularly the signal transmission between speed measurement and/or mileage counter devices and speed transmitters which are arranged external to said devices, which comprises: a speed transmitter; at least one movement transmitter; a recording arrangement; a measurement device associated with said at least one movement transmitter; and an evaluating circuit, wherein said at least one movement transmitter senses forces which are typical of driving, and further wherein said at least one movement transmitter is arranged inside said measurement device associated therewith, and further wherein said evaluating circuit supplies a disturbance signal which controls said recording arrangement when signals of said speed transmitter do not correspond with signals of said movement transmitter, wherein said evaluating circuit supplies a disturbance signal when a pulse of said at least one movement transmitter, which is stored in said evaluating circuit, is not canceled by a pulse of said speed transmitter after a determined period of time so as to verify a disruption of signals from said speed transmitter, wherein said evalating circuit further comprises: a flip-flop stage the set input of which is associated with said at least one movement transmitter and the reset input of which is connected with a signal input of said speed transmitter, wherein a timer is provided which is controllable by pulses of said movement transmitter, and further wherein an output of said movement transmitter is linked with an output of said flip-flop stage via an AND operation, wherein said device further comprises: a frequency transformer, wherein said frequency transformer is connected to said reset input of said flip-flop stage, and further wherein said frequency transformer has a pitch ratio such that pulse pauses associated therewith are shorter than a switching period of said timer at an output of said frequency transformer at a low driving speed.
Claim 3
Independent Claim
170 words
A device for verifying disturbances in signal transmission in motor vehicles, particularly the signal transmission between speed measurement and/or mileage counter devices and speed transmitters which are arranged external to said devices, which comprises: a speed transmitter; at least one movement transmitter; a recording arrangement; a measurement device associated with said at least one movement transmitter; and an evaluating circuit, wherein said at least one movement transmitter senses forces which are typical of driving and further wherein said at least one movement transmitter is arranged inside said measurement device associated therewith, and further wherein said evaluating circuit supplies a disturbance signal which controls said recording arrangement when signals of said speed transmitter do not correspond with signals of said movement transmitter, wherein said evaluating circuit determines, with the aid of signals from said speed transmitter and said at least one movement transmitter, whether a change in speed of said vehicle was effected at least one of during and after an acceleration phase in order to verify a simulated speed profile.
Claim 4
Independent Claim
170 words
A device for verifying disturbances in signal transmission in motor vehicles, particularly the signal transmission between speed measurement and/or mileage counter devices and speed transmitters which are arranged external to said devices, which comprises: a speed transmitter; at least one movement transmitter; a recording arrangement; a measurement device associated with said at least one movement transmitter; and an evaluating circuit, wherein said at least one movement transmitter senses forces which are typical of driving and further wherein said at least one movement transmitter is arranged inside said measurement device associated therewith, and further wherein said evaluating circuit supplies a disturbance signal which controls said recording arrangement when signals of said speed transmitter do not correspond with signals of said movement transmitter, wherein said evaluating circuit determines, with the aid of signals from said speed transmitter and said at least one movement transmitter, whether a change in speed of said vehicle was effected at least one of during and after an acceleration phase in order to verify a simulated speed profile.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-30 | 1999-05-01 | 1999-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-30 | 2003-05-01 | 2003-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-30 | 2007-05-01 | 2007-10-31 | $7700.00 | Window Closed / Lapsed |