30results about How to "Wide range of reception" patented technology

A power-assistance bicycle using a sensor having multiple magnet blocks evenly distributed in housing, related to electric power-assistance bicycles that provide a power-assistance signal with multipoint magnetic induction. The sensor comprises: a sensing element, a power assistance model processor (21), a digital-to-analog converter (27) and an operational amplifier (28). The sensing element comprises a rotating disk (1) and an annular-groove fixing disk (40) fitted with each other, and multiple permanent magnetic blocks (2) and the Hall element (3) are provided in a cavity of the rotating disk (1) and the annular-groove fixing disk (40). A plurality of permanent magnetic blocks (2) that are opposite in adjacent magnetic polarities are fixedly provided on the rotating disk (1). The Hall element (3) is provided on the fixing disk (40) and in proximity to the permanent magnetic blocks (2). The sensor is sleeved on an exterior of a medial shaft (51). The operational amplifier (28) is connected with the motor controller (29). Due to the relatively fixed positions of the permanent magnetic block (2) and the Hall element (3), the Hall element is capable of obtaining rectangular waves signals, so as to facilitate the sensor to output an adjustable and artificial setting power-assistance model having satisfying assistance power in the beginning and end via digital processing, thus allowing for optimal man-machine matching and for power conservation.

The invention relates to a handheld night vision instrument which pertains to the technical field of electron optical viewing instrument structure. The handheld night vision instrument is characterized by comprising a handheld image acquisition unit that transmits the information of an image acquired to two receiving ends by manually controlled operation; one end of the handheld image acquisition unit is mutually connected with a receiving end video eye-wear display which is worn at eyes, while the other end thereof is mutually connected with an image acquisition, display, storage and transmission unit on the back. The handheld night vision instrument has reasonable structure design and clear night patrol image, is smart and light, easy in use, strong in night vision and wide in receiving range, is an indispensable powerful weapon for protecting national property and the life safety of people and is of great social significance.

A sensor having multiple magnetic blocks of unevenly distributed magnetic fluxes in a housing includes, sequentially connected, a sensing element, a power-assisted model processor (21), a digital-to-analog converter (27), and an operational amplifier (28). The sensing element includes a rotating disk (1) and an annular-groove fixing disk (40) fitted therewith. Multiple permanent magnetic blocks (2) are fixedly arranged on the rotating disk (1) in a circular-annular distribution, and at least two of the permanent magnetic blocks (2) are different in magnetic fluxes. On a certain side of the rotating disk (1), the magnetic polarities of adjacent permanent magnetic blocks (2) are opposite, namely, the magnetic polarities of all of the permanent magnetic blocks (2) on the certain side of the rotating disk (1) are distributed in a pattern of pole N, pole S, pole N . . . ; a Hall element (3) on the fixing disk (40) is arranged at a position which is close to the permanent magnetic blocks (2). The N-S distribution of the magnetic polarities of the permanent magnetic blocks (2) allows the Hall element (3) to acquires rectangular wave signals, and to add the digital processing for setting a power assistance model, to allow for expression of the positions of the permanent magnetic blocks (2) on the rotating disk (1), and to determine the uses of different rectangular waves; the relative positions of the permanent magnetic blocks (2) to the Hall element (3) are fixed, and signal output is reliable.

The present invention relates to a finger vein recognition device with an adjusting function and the strong recognition capability. The finger vein recognition device comprises a shell, the shell is equipped with the jacks, and a frame, an adjusting plate, a supporting mechanism, an adjusting mechanism, an induction mechanism and an emission mechanism are arranged in the shell. The adjusting mechanism comprises a first motor, a buffer block, a first driving shaft, a sliding block, a supporting rod and a hinging block, a receiving mechanism comprises a receiving ring, four driving assemblies and at least two infrared receivers, each driving assembly comprises a connecting rod, a second motor and a driving gear, and at least two driven teeth are arranged at the periphery of the receiving ring. According to the finger vein recognition device with the adjusting function and the strong recognition, the adjusting mechanism adjusts the angle of the adjusting plate, so that the infrared lightemitted out by an emitter keep the fixed angles with the fingers, and the accurate vein images are obtained conveniently. Moreover, the receiving mechanism can receive the enough infrared signals, sothat the clear vein images are generated conveniently, and further the recognition capability of the device is improved.

The invention discloses a combined antenna capable of being erected on a satellite antenna. The combined antenna comprises a high-frequency antenna element (1), a low-frequency antenna element (2) and a unified hybrid amplifier (3), wherein the low-frequency antenna element (2) is a U-shaped metal bracket of which the two ends are in closed connection with the unified hybrid amplifier (3); the high-frequency antenna element (1) is fixed on the U-shaped metal bracket through a supporting piece (5); the bottom of the high-frequency antenna element (1) is provided with a wire hole (4); and one side of the supporting piece (5) is provided with a fixed piece (6) fixed on the satellite antenna. The combined antenna can be firmly erected on the satellite antenna, has a wide receiving range, covers high frequency, low frequency and ultrahigh frequency and can meet the increasing requirements of people on antenna functions.

The invention discloses a visible-light optical system for an all-view 3D measuring instrument. The visible-light optical system consists of a low-distortion wide-angle imaging optical lens and a linear array CMOS (complementary metal oxide semiconductor) camera which are fixed together, and the low-distortion wide-angle optical lens clearly images searched visible light images on the focus surface of the linear array CMOS camera. The visible-light optical system solves the problems about wide angle, long focus, high resolution, high precision, telecentric degree and the like, and an available optical system is provided for accurate positioning and angle measurement with the all-view 3D measuring instrument. The optical system enables the angle measuring accuracy of the 3D measuring instrument to reach second level accuracy in a work distance beyond the field depth range of 3 m-100 m in 90-degree view field, and linear deviation is ensured to be consistent for distortion of different view fields, which makes a very high requirement for the optical system.

The invention discloses an induced electric field well logger and belongs to the technical field of detection wells. The induced electric field well logger comprises an emitting system, a collecting and receiving system and a signal processing unit. The emitting system is used for emitting electromagnetic signals, the collecting and receiving system is used for collecting secondary induction fieldsignals passing a stratum, and the signal processing unit is used for receiving and collecting the signals collected by the collecting and receiving system to output all-around conductivity of the stratum of a preset depth, wherein the preset depth of the stratum is 0-30 m. The induced electric field well logger not only can achieve high precision imaging of a near stratum, but also can achieve high precision imaging of a far stratum.