45results about How to "Reduce the number of signals" patented technology

The invention discloses a mobile equipment positioning method in the WALN (wireless local area netork)/Bluetooth heterogeneous network environment. The method includes: firstly, generating a location fingerprint database of a positioning area; after positioning equipment enters the positioning area, measuring signal intensity of a signal source capable of being received at the position; selecting m WALN signals and n Bluetooth signals with the largest signal intensity; using a posterior probability matching algorithm to calculate posterior probability of signal intensity values of the signals in signal intensity Bayesian distribution of the location fingerprint database. The WALN and Bluetooth signals in the environment are utilized, a location fingerprint positioning method is combined, signal location fingerprint characteristics are described by using Bayes function, location fingerprint matching is performed by using the posterior probability matching algorithm, and a target estimation location is finally obtained with a posterior probability weighted processing algorithm; positioning precision of the mobile equipment in the WALN/Bluetooth heterogeneous network environment is improved, and the existing Bayes function based posterior probability matching algorithm is simplified.

The invention relates to the security technology and discloses a video monitoring system, a video monitoring method and a spherical camera. A plurality of signals, such as a video signal, a control signal and the like are compounded to reduce the number of slip ring cores practically needed in signal transmission of the camera, so that the camera is adapted to a spherical camera structure. The data stream transmitted to equipment at the rear end by the spherical camera is the data stream which contains uncompressed high-definition video primary data, so that video acquisition equipment does not need complex encoding and decoding, network protocol and the like, has simple total design and reduces the power consumption. At the same time, the spherical camera has the characteristics of high real-time property, high quality of images and the like.

The system comprises a local switch board and an opposite switch board, each respectively comprising main port and standby port. In the standby port of local switch board, a first local switch board diverter switch sits between the MAC layer and the physical layer and is used for connecting the MAC layer in the standby port of local switch board to the physical layer in the standby port through high-rate serial bus, or connecting the MAC layer in the standby port in local switch board to the physical layer in the main port of the opposite switch board through high-speed serial bus; in the standby port of the opposite switch board, a first opposite switch board diverter switch sits between the MAC layer and the physical layer and is used for connecting the MAC layer in the standby port of opposite switch board to the physical layer in the stand port of the opposite switch board through high-rate serial bus, or connecting the MAC layer in the standby port of opposite switch board to the physical layer in the main port of the local switch board.

The embodiment of the invention provides a laminated complementary metal oxide semiconductor image sensor and an image processing method. The laminated complementary metal oxide semiconductor image sensor includes: two laminated pixel units alternately arranged; the two laminated pixel units comprise photodiode PD columns of three sizes, wherein two layers of PD columns are respectively arranged on each laminated pixel unit in the two laminated pixel units; wherein the two layers of photodiode PD columns comprise PD columns of two sizes, the sizes of the PD columns of each layer in the two layers of PD columns are the same, and the two laminated pixel units utilize the PD columns of the three sizes to absorb RGB three-color light respectively and convert optical signals corresponding to the RGB three-color light into electric signals corresponding to the RGB three-color light; the CMOS pixel reading circuits are connected with the output ends of the two laminated pixel units, each layer of PD column is connected with one CMOS pixel reading circuit, and the CMOS pixel reading circuits are used for amplifying electric signals and reading the electric signals.

A fire alarm system provided with a fire receiver (1) to which a plurality of fire sensors and controlled apparatuses are connected. The fire receiver (1) comprises a LAN interface (11) for connecting with other fire receivers. When a fire sensor issues an alarm, the fire receiver transmits the fire information over the LAN together with a group number set in advance, and displays (12) only the fire information of the same group number when the fire receiver receives fire information transmitted from the other fire receivers via the LAN. Thus, even is a plurality of fire receivers are used in a large building divided into ridge sections, fire information can be shared without causing disorder.

The invention relates to the field of multiple-spray-head ink-jet printers and provides a phase different electronic calibration system of multiple-spray-head printing spray points. The phase different electronic calibration system of the multiple-spray-head printing spray point comprises a main board, a phase logic processing unit, a first asynchronous first in first out (FIFO), a second asynchronous FIFO, a first driving circuit, a second driving circuit, a first spray head and a second spray head. By adopting an electronic calibration technology, machine calibration difficulty is reduced, and mechanical calibration mechanism is simplified. A spray head dolly direction signal is used for judging positive and negative of phase, thereby reducing complexity of the phase logic processing unit and simultaneously improving the reliability. Phase transmission is shown by adopting pulse width, thereby improving flexibility and reliability of the main board controlling phase different between the two spray heads. By means of separation of the phase logic processing unit and the main board, original main board design is retained ingeniously, development cost is reduced, and development progress is accelerated. The number of signals of the main board and the spray head driving circuits is decreased, the cost is reduced, and the signal sending reliability of the main board is improved.

The invention discloses an electronic device. The electronic device comprises: a transceiver; a first antenna, a second antenna, a third antenna and a fourth antenna; and a first radio frequency circuit, a second radio frequency circuit, a third radio frequency circuit, a fourth radio frequency circuit. According to the invention, the first antenna and the second antenna are used in the electronicdevice to carry out frequency division multiplexing transmission on the emission signals and the main set reception signals of the two frequency bands respectively; meanwhile, the other two antennasare respectively used for transmitting the diversity receiving signals of the two frequency bands, so that the antenna for transmitting the transmitting signal and the main set receiving signal is prevented from transmitting the diversity receiving signal at the same time, the number of signals transmitted by the antenna is reduced, the antenna is enabled to transmit signals of at most two signalfrequencies at the same time, and the transmission performance of the antenna in the signal transmission process in the electronic equipment is improved.

The invention provides a fingerprint detection method, a fingerprint sensor, a fingerprint detection device and a mobile terminal. The fingerprint detection method comprises the following steps: dividing a fingerprint sensing area into a plurality of sub-areas; wherein the sensing signals are respectively acquired from at least two sub-regions to obtain a fingerprint image, and at least two incomplete continuous sub-regions are included in the at least two sub-regions, or at least two complete discontinuous sub-regions are included in the at least two sub-regions. In this way, the generated fingerprint image reflects the fingerprint characteristics of at least two separation positions on the fingerprint, and therefore it is ensured that the generated fingerprint image contains the diversified characteristics of the fingerprint.

The invention provides an FPGA configuration item online upgrading method, system and device and a storage medium, and belongs to the technical field of communication. The method comprises the steps that an upper computer sends an FPGA online upgrading instruction to a DSP, and the DSP sends an upgrading initialization instruction to the FPGA according to the online upgrading instruction; according to the upgrading initialization instruction, the FPGA executes online upgrading; after the FPGA executes online upgrading, the FPGA starts to load the logic codes from the 0 address of the configuration chip, and loads the logic codes corresponding to the board position signals according to the difference of the board position signals, so that the FPGA configuration item online upgrading and logic code multi-state loading are completed. According to the FPGA configuration item online upgrading method, the problems of FPGA online upgrading, complex multi-state code loading hardware circuit and high hardware cost are solved, online upgrading of the FPGA configuration item is ensured by adopting two methods at the same time, and the problem that the working state of a product is still in a safe state after online upgrading of the FPGA configuration item fails is solved.

The present invention discloses an unmanned aerial vehicle sound signal enhancement method based on a tetrahedron microphone array. The method comprises the steps of: employing a minimum variance distortionless response (MVDR) method and feature frequencies of unmanned aerial vehicle sound signals to roughly estimate the direction of the unmanned aerial vehicle, employing array signal processing to inversely deduce the time delay between the microphones, then performing delay summation processing of original signals on a time domain through wave beams, performing weighing of multi-path signaldelays to the same time node, finally obtaining a set of signals to achieve an effect of unmanned aerial vehicle sound signal enhancement, and at the same time, employing the processing mentioned above for each array element of the tetrahedron to perform signal enhancement of all the microphones of the tetrahedron. The unmanned aerial vehicle sound signal enhancement method fully utilizes the information of each microphones of the tetrahedron to perform signal enhancement to obtain enhancement signals having the same quality as the receiving signals so as to greatly improve the signal to noiseratio of the receiving signals and have a high value for the sound array processing field.

There is provided automatic gain control of radio chains of a receiver. At least two radio frequency (RF) signals are received. Each RF signal is received on an individual radio chain from an antenna array. By comparing the at least two RF signals to a threshold it is determined whether to perform gain control or not of at least one of the at least two RF signals before analogue combining of the at least two RF signals. A notification is sent to a detector regarding whether gain control is performed or not. Analogue combining of the at least two RF signals is performed, thereby generating a single input to the detector.

The invention relates to a multi-format data transmission system which comprises a clock selection controller, a parallel/serial conversion module, a data splicing module, a data selection controller and a data transmission circuit. The clock selection controller selectively outputs clock signals in different data output formats, and selects applied clock signals according to instruction; the parallel/serial conversion module comprises a 8bit parallel/serial conversion unit, a 10bit parallel/serial conversion unit and a 14bit parallel/serial conversion unit, and carries out different bit widths of parallel/serial conversion on data; and the data transmission circuit outputs different formats of data in correspondence to clock and synchronization signals to the next level of circuit. The multi-format data transmission system uses the same interface to send different formats of serial data, meets application requirement of multi-format data transmission, effectively improves the flexibility and data rate of data transmission, decreases the number of application interface chips and the number of connecting signals, saves the cost, and improves the reliability of data transmission.

The present invention discloses a lithium battery protection system and a protection method thereof. The lithium battery protection system comprises a master protection chip and a plurality of slave protection chips. A detection module is used to trigger an output overvoltage protection signal for the master protection chip or the slave protection chip coupled to the battery when it detects that the cell voltage of a battery exceeds a preset threshold voltage of overvoltage protection within a time range exceeding a set delay time; the master protection chip generates an overvoltage protectionhysteresis signal according to the overvoltage protection signal and transmits it to each slave protection chip through a transmission module; a judgment module is used to judge whether each slave protection chip outputs the overvoltage protection signal; if triggered, the overvoltage protection threshold voltage of the triggered slave protection chip is adjusted to the overvoltage protection hysteresis threshold and all balanced circuits of the m batteries corresponding to the chip are turned on. The effect is as follows: the invention overcomes the defects in the prior art that more interfaces are wasted, the package yield is low and the cost is increased.

The embodiment of the invention provides an image sensor and an image processing method. The image sensor comprises a triangular laminated pixel unit composed of a first layer of triangular pixel unitand a second layer of triangular pixel unit, wherein the first layer of triangular pixel unit comprises photodiode PD columns of two sizes, the second layer of triangular pixel unit comprises PD columns of one size except the two sizes, a triangular laminated pixel units are used for absorbing RGB three-color light by utilizing PD columns of three sizes and converting optical signals corresponding to the RGB three-color light into electric signals; and a CMOS pixel reading circuit which is connected with the output end of the triangular laminated pixel unit and is used for amplifying the electric signal and reading the electric signal.