Topic
Speedometer
About: Speedometer is a research topic. Over the lifetime, 1650 publications have been published within this topic receiving 12519 citations.
Papers published on a yearly basis
1 / 3
Papers
Patent•
21 Apr 2003
TL;DR: In this paper, a decision computer mounted in the controlled vehicle receives such code signals along with code signals generated by the speedometer or one or more sensors sensing steering mechanism operation and generates control signals.
Abstract: A system and method assists the driver of a motor vehicle in preventing accidents or minimizing the effects of same. In one form, a television camera is mounted on a vehicle and scans the roadway ahead of the vehicle as the vehicle travels. Continuously generated video picture signals output by the camera are electronically processed and analyzed by an image analyzing computer, which generates codes that serve to identify obstacles. A decision computer mounted in the controlled vehicle receives such code signals along with code signals generated by the speedometer or one or more sensors sensing steering mechanism operation and generates control signals. Such code signals may be displayed, and a synthetic speech or special sound generating and warning means used, to warn the driver of the vehicle of approaching and existing hazards. The system may also use the control signals, particularly through application of fuzzy logic, to control the operation of the brakes and steering mechanism of the vehicle to avoid or lessen the effects of a collision. In a particular form, the decision computer may select the evasive action taken from a number of choices, depending on whether and where the detection device senses other vehicles or obstacles.
594 citations
TL;DR: It is concluded that behavioural validity in absolute terms was not quite satisfactory, especially regarding choice of speed, whereas relative validity was good for both speed and lateral position.
320 citations
Patent•
10 Dec 1999
TL;DR: A self-contained device for capturing video imagery in response to a triggering event may include a mirror (16) and be mounted to a vehicle windshield (14) in place of a conventional rearview mirror as mentioned in this paper.
Abstract: A self-contained device (10) for capturing video imagery in response to a triggering event may include a mirror (16) and be mounted to a vehicle windshield (14) in place of a conventional rear-view mirror. The device includes a housing (18) in which the electronics and related elements of the invention are contained. These elements include one or more data sensors (40, 42), at least one of which is an image sensor. Also included are a data sensor circuit and a capture circuit. The data sensor circuit responds to the triggering event, and may include data sensors coupled to vehicle systems such as a speedometer, tachometer, brake, turn signals or the like, or other data sensors such as an accelerometer (40) or a vehicle position sensor. The triggering event may be, for example, a sudden change in acceleration indicative of an impending collision, or it may be a change in the signal provided by any such data sensor, including the image sensor. The capture circuit is coupled to the image sensor and captures a signal representing the video imagery by recording it in a digital memory, by transmitting it to a remote location, or by other suitable means. The capture circuit terminates capture of the signal in response to the data sensor circuit sensing a triggering event. The captured data thus describe circumstances leading up to the time of the triggering event. The data can be analyzed to help police, insurance or other investigative personnel understand those circumstances.
263 citations
TL;DR: The accuracy of speed determination was preserved even when the positional data were degraded due to poor satellite number or geometry, and GPS data loggers are accurate for the determination of speed over-ground in biomechanical and energetic studies performed on relatively straight courses.
245 citations
Patent•
15 Sep 1999TL;DR: In this paper, a mobile communication terminal (202) located onboard a vehicle (108) for receiving destination information, generally using wireless means, from a central facility or hub (104).
Abstract: Apparatus and method for determining when a vehicle (108) has arrived or departed from a planned or an unplanned stop, while minimizing or completely eliminating driver intervention. The apparatus comprises a mobile communication terminal (202) located onboard a vehicle (108) for receiving destination information, generally using wireless means, from a central facility or hub (104). A speedometer (210) also located onboard the vehicle (108) determines the speed of the vehicle and a position sensor (212) onboard the vehicle (108) determines the vehicle position. The vehicle speed and position are provided to a processor (206), also located onboard the vehicle (108), which uses the speed and position information to determine a vehicle arrival or departure from a planned or unplanned stop. The processor (206) generates an indication of the event, either arrival or departure, directly to the central facility (104), to the vehicle operator, or both.
237 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 17 |
| 2020 | 31 |
| 2019 | 49 |
| 2018 | 47 |
| 2017 | 53 |
| 2016 | 56 |