In one embodiment, a system includes a vehicle, one or more probes coupled to the vehicle, and a controller. The vehicle is operable to traverse a distance. The one or more probes are operable to measure wind pressure and generate one or more wind pressure measurements. The controller is operable to receive the one or more wind pressure measurements from the one or more probes, determine a wind angle relative to the vehicle using the one or more wind pressure measurements, and determine a wind speed relative to the vehicle using the one or more wind pressure measurements and the wind angle.

A method for testing movement speed includes, but is not limited to: measuring a static pressure P.sub.0 of an inner cavity of a pressure hole of a mobile device (S100); aligning the pressure hole to a wind direction and measuring a total pressure P of the wind in a static state (S101); aligning the pressure hole to the wind direction in a moving process, and measuring a pressure P.sub.m of the inner cavity of the pressure hole in a movement direction (S102); obtaining a current wind speed v.sub.f according to a correspondence relationship between a wind speed v.sub.f and a dynamic pressure P-P.sub.0; and obtaining a current relative movement speed v.sub.r according to a correspondence relationship between a relative movement speed v.sub.r and a pressure difference P.sub.m-P.sub.0 (S103); and obtaining a current movement speed v according to the current relative movement speed v.sub.r and the current wind speed v.sub.f (S104).

A rotating device sensing apparatus includes: a rotating device comprising a detection target unit; a pattern portion formed in the detection target unit in a direction of rotation of the rotating device; a first sensor disposed to face one region of the detection target unit; and a second sensor, spaced apart from the first sensor, and disposed to face another region of the detection target unit, wherein the pattern portion comprises a first pattern portion and a second pattern portion having different widths.

A rotating device sensing apparatus includes: a rotating device comprising a detection target unit; a pattern portion formed in the detection target unit in a direction of rotation of the rotating device; a first sensor disposed to face one region of the detection target unit; and a second sensor, spaced apart from the first sensor, and disposed to face another region of the detection target unit, wherein the pattern portion comprises a first pattern portion and a second pattern portion having different widths.

The subject of the present invention is a method for communicating a malfunction of a system for measuring speed and direction of rotation of a rotary shaft, said system comprising: a toothed wheel associated with said rotary shaft, called target (14), a magnetic field sensor (10′), measuring values (K, A) of the magnetic field (B, B′, B″) generated by the passage of the teeth (T1, T2 . . . Ti) in front of said sensor (10′) and delivering a signal (S, S′, S″) to processing means 13). According to the invention, the method comprises the following steps: step 1: comparison by the sensor between the measured values and predetermined threshold values of the magnetic field, step 2: if the measured values are below the predetermined threshold values, step 3: generation by the sensor of a coding on the signal, representative of the measured values, to communicate a malfunction of the system to the processing means.

Method and apparatus are disclosed for preventing damage to an object within a charging field of a wireless vehicle battery charger. An example vehicle includes a wireless vehicle battery charger having a charging field, a plurality of Bluetooth antennas, and a processor. The processor is configured to identify a location of an object using one or more of the plurality of Bluetooth antennas, and, responsive to determining that the object is within the charging field, disable the wireless vehicle battery charger.

A method for diagnosing an inversion of a crankshaft sensor includes the following steps: acquiring a signal by way of the crankshaft sensor, at each detection of a tooth, determining a tooth time elapsed since the previous tooth detection, at each detection of a tooth, calculating a ratio Ri of the tooth times according to the formula Ri=(Ti−1).sup.2/(Ti*Ti−2), where Ri is the ratio, Ti is the last tooth time, Ti−1 is the penultimate tooth time, and Ti−2 is the tooth time preceding the penultimate tooth time, comparing the ratio Ri with a low threshold Sb, indicative of a turn marker, and a high threshold Sh, indicative of an absence of inversion, a ratio Ri between the two thresholds Sb, Sh being indicative of an inversion.

A method for diagnosing an inversion of a crankshaft sensor includes the following steps: acquiring a signal by way of the crankshaft sensor, at each detection of a tooth, determining a tooth time elapsed since the previous tooth detection, at each detection of a tooth, calculating a ratio Ri of the tooth times according to the formula Ri=(Ti−1).sup.2/(Ti*Ti−2), where Ri is the ratio, Ti is the last tooth time, Ti−1 is the penultimate tooth time, and Ti−2 is the tooth time preceding the penultimate tooth time, comparing the ratio Ri with a low threshold Sb, indicative of a turn marker, and a high threshold Sh, indicative of an absence of inversion, a ratio Ri between the two thresholds Sb, Sh being indicative of an inversion.

A magnetic sensor may include a first sensing element and a second sensing element. The first sensing element may be capable of sensing a first component of a magnetic field that is non-parallel to an axis formed by an intersection of a first plane and a second plane. The first plane may be a plane in which a tooth wheel rotates, and the second plane may include a first surface of the first sensing element and a second surface of the second sensing element. The first component of the magnetic field may be on the second plane. The second sensing element may be capable of sensing a second component of the magnetic field. The second component of the magnetic field may be on the second plane.

In a monitoring apparatus, an optical sensor senses objects present in a sensing area, and moving speeds and moving directions of the objects are calculated based on changes with time in positional information of the sensed objects. An object which meets a predetermined moving condition is determined as a moving object. Hence an entrance of the moving object into the sensing area can be monitored. In this apparatus, by a determining section, it is determined whether or not an object is sensed in an area (after-passage sensing area) which is set to include positions adjacent to positions through which the sensed moving object has passed. When the object has been sensed in the area, by the determining section, it is further determined whether or not the object has remained for a predetermined determination period of time or more. This determined result is outputted by an outputting section.