49results about How to "Omnidirectional" patented technology

Provided is a UHF plane inverted-F and monopole combined antenna applied to an RFID reader-writer. The UHF plane inverted-F and monopole combined antenna applied to the RFID reader-writer comprises a main radiation part (2) of an inverted-F antenna, a deformed radiation branch tail end part (1) of the inverted-F antenna, short circuit microstrip lines (3) of the inverted-F antenna, a feeder (5) of the antenna and a short circuit probe (4), wherein the antenna is arranged on the obverse face of a dielectric plate, and an earth plate is arranged on the reverse face of the dielectric plate. Through deformation of the radiation branch tail end part of the plane inverted-F antenna, the plane inverted-F and monopole combined antenna is formed; the radiation branch tail end part of the inverted-F antenna is divided into two paths of microstrip lines, a monopole antenna model is formed, and the far field radiation of the antenna has the characteristics of a monopole antenna; the three face surrounding technology is adopted for the earth plate of the designed antenna, and the influence on an integrated circuit from radiated electromagnetic waves is reduced. Not only is the advantage of high gains of the plane inverted-F antenna reserved, but also the advantage of good omni-directivity of the monopole antenna is achieved. The UHF plane inverted-F and monopole combined antenna applied to the RFID reader-writer is applicable to the field of UHF antennas of RFID reader-writers.

The invention discloses a double-port double-layer planar spiral slot antenna, and the antenna comprises an upper substrate and a lower substrate which are fixedly connected in a laminated manner, wherein a microstrip line A and a microstrip line B are arranged on the upper surface of the upper substrate; an elliptic metal ring is arranged on the lower surface of the upper substrate; an annular gap is formed at the outer side of the oval metal ring. The remaining part of the lower surface of the upper substrate is provided with a metal layer A; two spiral metal arms are arranged on the lower surface of the lower substrate; annular gaps are formed at the outer sides of the two spiral metal arms; a metal layer B is arranged at the outer side of the annular gap; the microstrip line A is located above the elliptic metal ring; and the microstrip line B is connected with one of the spiral metal arms through a metal wire. The antenna is provided with the two microstrip lines used for feeding,and the isolation degree between corresponding ports of the two microstrip lines is large, so the antenna can serve as two antennas and be used for communication modules with different frequencies, thereby reducing the size and cost of a communication system.

The invention discloses an internal driving method of a three-wheel turning body of a spherical robot. The spherical robot comprises a spherical shell, a detector support, a detector, a circuit module, a supporting plate, a battery compartment and an actuating device, wherein the detector support is provided with a bull-eye wheel, and the actuating device comprises a Mecanum wheel and a drive motor. The internal driving method comprises the first step of obtaining a target parameter, the second step of controlling the orientation of the spherical robot, the third step of controlling three wheels to stop running after the orientation of the spherical robot faces a target position, the fourth step of controlling a number two wheel and a number three wheel to conduct uniform velocity and inverted running, the fifth step of controlling the three wheels to stop running after the circuit module receives a signal that the spherical robot arrives at the target position, and at this time, the spherical robot precisely arrives at the target position. According to the internal driving method of the three-wheel turning body of the spherical robot, the problems that in the prior art, the movement is not flexible and convenient, the movement efficiency is low, and the monitoring capacity is greatly limited by environmental facilities are solved.

The invention discloses a vital sign simulation device for rescue training and a simulation method. The vital sign simulation device comprises a shell and a radar cross section simulation sheet for simulating corresponding radar cross section sizes during the human body target detection of a radar, wherein the radar cross section simulation sheet is fixed in the shell, and the radar cross sectionsimulation sheet swings according to specified amplitude and frequency so as to simulate the vital sign state of a human body. According to the simulation method, the area, swing amplitude and swing frequency of the radar cross section simulation sheet during the simulation of different human body targets are determined in advance; and during rescue training, the vital sign simulation device is arranged at a designated position; the radar cross section simulation sheet is made to swing according to target amplitude and frequency. The vital sign simulation device for rescue training of the invention has the advantages of simple and compact structure, low cost, small weight and small size, and can be applied to the rescue training of radar life detector devices so as to realize vital sign simulation. The vital sign simulation device has the advantages of high simulation precision and the like.