30results about How to "Strong reception signal" patented technology

The invention provides a non-paired fast data transmission method applied to a low power consumption Bluetooth device. The non-paired fast data transmission method applied to a low power consumption Bluetooth device is characterized by comprising the following steps: 1) setting a unique identification code for each acquisition or measurement object, and setting a numeric encoding corresponding to the MAC address for each Bluetooth acquisition or measurement slave device; 2) arranging a Bluetooth master device in the area where the acquisition or measurement object located in, wherein the Bluetooth master device adopts the non battery power supply mode; after the electrifying initialization is completed, the Bluetooth master device enters the rotation scanning mode, and continuously monitors the broadcast message of the near Bluetooth slave device; ...; 7) if the Bluetooth acquisition or measurement slave device receives the response of the Bluetooth master device, emptying the sending counter, entering into a low power consumption state, and waiting for the next data transmission. According to the non-paired fast data transmission method applied to the low power consumption Bluetooth device, the data of the Bluetooth slave machine is transmitted to the Bluetooth master machine by means of the connectionless broadcast, therefore, the identity of the Bluetooth slave machine user can be quickly verified; the Bluetooth master machine with the nearest transmission distance is matched to receive the data, therefore, the invention has the characteristics of fast transmission speed, low power consumption and high frequency and large scale use.

The invention discloses a radio station transmitting antenna, especially a transmitting antenna with a perpendicular depolarizing single dipole, comprising a strut body and multilayer antenna vibrators fixed onto the strut body, wherein each layer of the antenna vibrator is a single dipole vibrator, the two poles of which are distributed in a linear form from up to down and perpendicular to the ground, each layer of the antenna vibrator is fixedly connected to the sides of the strut body through stings, the multilayer antenna vibrators are distributed uniformly on the same side of the strut body from up to down, the strut body is a hollow metal pole with a certain taper, and is connected with two sections or more.

The invention discloses a laser triangular displacement sensor and a correction method of the non-linear errors of the laser triangular displacement sensor, belonging to the technical field of photoelectric measurement. The laser triangular displacement sensor comprises a semiconductor laser device, a focusing lens set, a receiving lens set, a photoelectric detector and a signal processing circuit, wherein the semiconductor laser device and the focusing lens set are coaxial, and the semiconductor laser device, the focusing lens set and a detected target are arrayed in sequence to commonly form a transmitting terminal; the receiving lens set and the photoelectric detector are arrayed in sequence; and the signal processing circuit is connected with the photoelectric detector and is used for processing an electric signal received by the photoelectric detector to obtain displacement of the detected target. The laser triangular displacement sensor provided by the invention has very high displacement measurement precision; the displacement of a common scattering object can be measured and the displacement of a mirror surface reflection object can be measured; meanwhile, in the receiving lens set, a lens is subjected to inclination or eccentric treatment and the non-linear errors are corrected based on a principle; and an economical and effective method is provided for improving a problem that the resolution ratio is not uniform.

The invention relates to a high-temperature high-sensitivity piezoceramic material and a preparation method thereof, which belongs to the field of ceramic composition and preparation. A constitution formula of the high-temperature high-sensitivity piezoceramic material is xPbZrO3+yPbTiO3+zPbNbO3+mSrTiO3+nLaTiO3+awt.percentSiO2+bwt.percentCr2O3+cwt.percentNb2O5+dwt.percentLa2O3, wherein the x is between 0.4 and 0.6; the y is between 0.4 and 0.5; the z is between 0.001 and 0.05; the m is between 0.0 and 0.05; the n is between 0.01 and 0.05; x+y+z+m+n is equal to 1; the a is between 0 and 0.5; the b is between 0 and 0.5; the c is between 0 and 0.5; and the d is between 0 and 0.5. The material is modified and prepared based on the prior piezoceramic process, and main performances of the material comprise: d33 is equal to 500pC / N, epsilon33T / epsilono is equal to 1,800, g33 is equal to 31.4, tg delta is equal to 1.5, Kp is equal to 0.62, Qm is equal to 60, Tc is equal to 352 DEG C, and rhov(200 DEG C) is equal to 7.8*10<8>omega.cm. The material has the characteristics of high service temperature (high up to 200 DEG C), high sensitivity (g33 is equal to 31.4), strong signal receiving, and good stability.

Disclosed is a manufacturing method of a transparent antenna. The method comprises the following steps of a, preparing an antenna base material with the transparency not lower than a predetermined transparency; b, growing a graphene film on the antenna base material; c, carving the graphene film through laser to form a preset antenna pattern; d, adhering the antenna base material film sheet to a main base material with the transparency not lower than the predetermined transparency or the case of an electronic product. By directly growing the graphene film on a transparent base material or a base material film sheet and carving out the antenna pattern through the laser, the excellent-performance transparent antenna can be obtained.

Provided is a full-band signal indoor digital television receiving antenna, which comprises an installation cavity arranged in a wall body, a mobile rail arranged in the installation cavity, an antenna base arranged on the mobile rail and an antenna arranged on the antenna base. The outer surface of the installation cavity is provided with a hollow separator plate; the two sides of the installation cavity are respectively provided with a metal sheet; one end of the mobile rail is provided with two rotatable traction spools, and the other end thereof is provided with a rotatable line-passing reel. One of the traction spools is connected with one side of the antenna base through a traction line, and the other traction spool is connected with the other side of the antenna base through the traction line after the traction line passing around the line-passing reel. The antenna is arranged in the wall body, thereby preventing influence of the antenna on overall indoor decoration style; and meanwhile, the attitude and position of the antenna can be adjusted conveniently, and intensity of the received signal is high.

The invention provides a radio PD and SAD coexistence circuit, a radio set and a radio station play method, and belongs to the field of radio sets. The radio PD and SAD coexistence circuit comprises an integrated circuit U1, a first antenna signal reception module, a second antenna signal reception module and a signal selection control module, wherein the output end of the first antenna signal reception module is connected with the input end of the input end of the signal selection control module and the AM signal input end of the integrated circuit U1, the output end of the second antenna signal reception module is connected with the input end of the signal selection control module and the first FM signal input end of the integrated circuit U1, and the output end of the signal selection control module is connected with the second FM signal input end of the integrated circuit U1. According to the radio PD and SAD coexistence circuit, the radio set and the radio station play method, two modes can be switched, the practicality is high, signal interference can be effectively reduced via an algorithm, and the reception signals are stronger.

A wireless communication method and protocol for wireless RF transmission of data, e.g. audio data, with low latency. The method involves a fixed part (FP) serving as synchronization master, and one or more portable parts (PP) being synchronization slaves. The FP performs scanning between a set of supported channels within one limited frequency band, such as within an ISM band. Further, the FP performs collecting measures of RF interference level on at least a plurality of the supported channels in response to the scanning, preferably using own interference level measurement and by collecting RSSI data from the PP for the supported channels. In response to these measures of RF interference level, the FP executes a selection algorithm for selecting and re-selecting first and second different frequencies for respective first and second duplex RF bearers from the set of supported channels to select the channels with least RF interference. Finally, the FP transmits, in one frame of such as 1 ms to 3 ms length, the same data packet on both of said first and second duplex RF bearer frequencies to the PP. This provides a roboust and low latency wireless interface suitable for Human Interface Devices and audio devices, e.g. for gaining equipment.

The invention discloses a method for effectively realizing time-code signal receiving of indoor electric waves. The method is characterized in that a transmitting circuit board comprises an AM (Amplitude Module) antenna circuit, an AM receiving and decoding circuit, an MCU (Micro Control Unit) circuit and an indicating lamp circuit, wherein the MCU circuit sends an instruction received by an electric wave clock, and excites the AM receiving and decoding circuit; a timing electromagnetic wave signal transmitted by a time service center is received by the AM antenna circuit; after amplification and demodulation of the AM receiving and decoding circuit, the MCU circuit reads timing time information and carries out timing adjustment on the time; when receiving the signal, the MCU circuit sends an instruction to the indicating lamp circuit and prompting that the signal is being received; and after the receiving is successful, the MCU circuit sends an interruption request signal, prompts that the decoding is finished, sends a receiving stopping instruction to the AM receiving and decoding circuit, so that the AM receiving and decoding circuit returns to a sleeping state and simultaneously the indicating lamp circuit is stopped. The method has the advantages that the structure is simple, the operation is simple and convenient and the outdoor temperature detection can be realized.