36results about How to "Small range of angles" patented technology

The invention relates to a moving object detecting device based on a microwave transducer and an ultrasonic transducer. The moving object detecting device comprises a low-power dissipation microcontroller unit, the microwave transducer, the ultrasonic transducer, a signal amplifying and filtering processing circuit, a field bus interface unit, a temperature transducer and a power source unit. The microwave detecting technology and the ultrasonic detecting technology are combined. The detecting distance of the microwave transducer is far, the response speed is high, the anti-jamming capability is high, the measuring precision of the ultrasonic measurement is high, and the angle range is small. When the microwave transducer detects that a moving object passes a detecting area, the ultrasonic transducer is started immediately to confirm that the object enters the detecting area, and the distance and speed information can be obtained. The moving object detecting device is compact in structure and capable of dealing with different environments and detecting the low-speed moving object, the problems that an existing detecting technology based on a pressure transducer, a pyroelectric infrared transducer and visual patterns is large in error, poor in anti-jamming capability and the like are well solved, and the problems that installation and construction are difficult are solved. The moving object detecting device has the advantages of being small in size, high in response speed and low in power consumption.

Apparatus and method for detecting the direction of rotation of an internal combustion engine using a magnet wheel which moves past an electrical ignition coil. For each revolution, at least one current or voltage pulse is induced in the coil having a polarity dependent on the direction of rotation. The magnet poles and the coil have geometric relationships that, upon each magnet wheel revolution, the curve form of the current or voltage pulse has at least two prespecified extreme points with a curve characteristic which is substantially neither rising nor falling and at least one break point with a discontinuity. A direction of rotation signal is derived from these curve characteristics.

In a vehicle air conditioner having an actuator for driving an air mixing door and mode switching doors, an automatic range and a manual range are set in different operation angle ranges of an operation angle of the actuator. In the automatic range, an air outlet mode is automatically switched in accordance with an opening degree of the air mixing door. On the other hand, in the manual range, a multi-mode or a defroster mode is manually set, regardless of the opening degree of the air mixing door. In the manual range, air is simultaneously blown from all openings such as a face opening, a foot opening and a defroster opening in the multi-mode, and air is blown from the defroster opening in the defroster mode.

In an acoustic design support apparatus, a speaker selection supporter selects a desired speaker as a candidate for use in a given space based on shape information representing a shape of the space. A speaker mounting angle optimizer calculates an optimal mounting direction of the selected speaker by selecting a mounting direction pattern which minimizes a degree of variation among sound pressure levels at a plurality of positions on a sound receiving surface defined in the space. An acoustic parameter calculator calculates a variety of acoustic parameters at sound receiving points within the space based on both of the shape information of the space and the optimal mounting direction of the speaker.

The invention aims at solving a technical problem that a tracking device that is used for the sun and a satellite and is capable of meeting application requirements of solar energy engineering and a satellite polar shaft antenna is needed to be provided. The tracking device comprises a load support, a tracking transmission mechanism, and a pedestal of the tracking transmission mechanism. The tracking transmission mechanism includes two moving shafts; one of the moving shafts is a polar shaft that is parallel to a rotation axis of the earth and is used for realizing motions at east-west directions and continuously tracking a change of an hour angle at a constant speed; and the other moving shaft is a declination shaft that is perpendicular to the polar shaft and is used for realizing north-south motions to change a declination angle. And the polar shaft and the declination shaft are respectively driven by a polar shaft tracking transmission mechanism and a declination shaft tracking transmission mechanism. According to the invention, the provided tracking device has the advantages of simple structure, low cost, reliable running, and low self power consumption and can be widely applied to solar energy engineering and satellite polar shaft antenna equipment.

In such a high lift twin-rudder system that: a pair of high lift rudders 1, 2 is arranged behind a single propeller 3; the respective high lift rudder 1, 2 has a top end plate 6, 7 and a bottom end plate 8, 9 at the top end and the bottom of a rudder blade 4, 5; the respective rudder blade 4, 5 is provided with a reaction fin 10, 11, protruding from an inboard face of the rudder blade 4, 5 on a nearly same level with the axis of the propeller 3, that is originated nearly from the leading edge portion toward the rear and has a fixed chord length; the reaction fin 10 of the rudder blade 4 that faces on the board-side where the propeller blades rotate in the ascending direction assumes a posture that makes such attack angle that the ratio of a forward vectored thrust to a drag, both produced by a propeller slip stream having a stream component in the ascending direction, becomes maximum; and the reaction fin 11 of the rudder blade 5 that faces on the board-side where the propeller blades rotate in the descending direction assumes a posture that makes such attack angle that the ratio of a forward vectored thrust to a drag, both produced by a propeller slip stream having a stream component in the descending direction, becomes maximum, the respective rudder blade 4, 5 is so constituted that a chord length is of 60~45% of a propeller diameter.

A small, compactly configured reference position detection device 170 for a rotary transfer mechanism includes a rotary member 130 that can rotate through a rotational angle less than one revolution from a first rotational position past a second rotational position and reference position to a third rotational position; a detection flag disc 151 that can move in a range from a first position past a detection position to a second position; a detector 162 that detects the detection flag passing the detection position, and a flag moving mechanism. The flag moving mechanism can move the detection flag disc 151 tracking the rotary member 130. The position of detection flag disc 151 movement when passing the reference position of the rotary member 130 is the detection position.

The invention discloses a novel small-sized mechanical variable laser attenuation device. The device mainly comprises a laser input part, a laser intensity attenuation appliance, a laser output part and a control part which are connected through a laser path, wherein the laser input part is arranged at the headmost end of the whole device, a laser ray after passing through the laser input part shines on the laser intensity attenuation appliance, the laser intensity attenuation appliance is arranged on an angle rotating component of the control part, the control part adjusts the incident angle of the laser ray on the laser intensity attenuation appliance, and after being attenuated on the laser intensity attenuation appliance, the laser ray is output by the laser output part. The device disclosed by the invention is applied to occasions such as laser communication and laser information processing and the like which are required to be subjected to laser intensity attenuation, and also can be applied to situations such as precise distance measurement and holographic information processing and the like which are required to be subjected to beam parameter control; and compared with the existing conventional techniques, the device has the advantages of simple process, low price, large extinction ratio, large operating wavelength range, small polarization sensitivity, less insertion loss and no transmission loss.

The invention discloses a homing head aiming positioning method and aiming positioning system. The homing head aiming positioning method comprises the steps that lasers emitted by a laser device are shot into an optical system through an optical window of a homing head; a cat eye echo signal returned by the optical system is received, and the cat eye echo signal enters a photoelectric detection imaging unit for imaging after being subjected to view field compression through an off-axis compression unit, and then the imaged cat eye echo signal is output to a signal processing unit; by controlling working timing sequences of the laser device and the photoelectric detection imaging unit, original images of two adjacent frames formed by the photoelectric detection imaging unit correspond to the transmitting state and the non-transmitting state of the laser device respectively, so that a differential image of the two adjacent frames is obtained and output to the signal processing unit; andthe signal processing unit calculates the differential image by adopting a centroid capture algorithm, the gray-value centroid position of the differential image is obtained, and target information isoutput. According to the homing head aiming positioning method and aiming positioning system, the overall structure is compact, and the target position information with the precision higher than thecorresponding precision of a single pixel can be output by improving the working mode and the calculation method.

The invention discloses a solar condensing and tracking device which comprises support legs and a tracking device. A support is hinged onto the support legs, a tracking support seat is hinged onto the support, a rotating rod is hinged onto the tracking support seat, a solar condensing device is arranged on the rotating rod, and the tracking device controls rotation of the tracking support seat. The solar condensing and tracking device has the advantages that the solar condensing and tracking device is simple in structure and high in efficiency, the photoelectric conversion rate of solar cells in a solar photovoltaic system can be increased, accordingly, the energy utilization rate can be increased, and purposes of saving energy and reducing emission can be achieved.

A lying surface for a bed, especially for a healthcare and/or hospital bed, comprises support elements (22) and at least one electro-mechanic lifting unit (20) for lifting and lowering one of the support elements (22) relative to a bearing element (62) of the support element (22). The at least one lifting unit (20) comprises a housing (24) with an electromotor (32) having a drive shaft (34), a transmission (38) and a lifting member (50) supported at the bearing element (62) of said one support element (22). The lifting member (50) is adapted to be rotated by the transmission (38) and to be moved both up and down during a rotary movement of 360°.

An air cleaner in a two-stroke engine having an air supply passage and an air/fuel mixture supply passage includes: a first air passage and a second air passage arranged in parallel, the first air passage being communicated with the air supply passage and the second air passage being communicated with the air/fuel mixture supply passage; and a choke valve opening and closing both of the first air passage and the second air passage of the air cleaner. The choke valve has a pivot axis and a pivotable valve member pivoting about the pivot axis to open and close respective inlet openings of the first air passage and the second air passage. One of the first air passage and the second air passage that is located closer to the pivot axis has an inlet opening flattened along a pivoting edge of the valve member.

The invention relates to a method for calibrating a position (24) of a matrix headlamp (12) of a motor vehicle by means of a camera (16) of the motor vehicle (10), wherein the matrix headlamp (12) comprises a plurality of segments (S1, S2, S3, S4, S5, S6) controllable independently of one another for light emission. At least one first image of a sign is recorded by means of the camera (16), a location area in which the sign (30) is located is determined, the illuminance of a first segment (S1, S2, S3, S4, S5, S6) is changed, at least one second image is recorded and examined in order to ascertain whether a change in a glare effect detected on the basis of the recorded at least one second image has occurred, and, if so, the position (24) of the matrix headlamp (12) is calibrated in accordance with the first segment (S1, S2, S3, S4, S5, S6) and position information (KL, KR) derived from the location region.

The invention relates to a shift roller arrangement (32) for a shift device (30) of a transmission arrangement (16), in particular for a motor vehicle, the shift roller arrangement comprising: a shiftroller body (34) which can be rotated about a shift roller shaft (40); and a stop device (60) for referring to the rotational position of the shift roller body (34), wherein the stop device (60) hasa stop element (62) which is designed in such a way that the stop element can be brought into contact with a housing stop (65) in a first reference position, and the stop element (62) is mounted so asto be rotatable relative to the shift roller body (34) in a rotationally limited manner in the rotational direction.