31results about How to "Does not affect signal quality" patented technology

The invention discloses a wireless router control method and device and a wireless router applying the same. Data flow between the wireless router and a terminal is monitored in real time, when the real-time data flow is smaller than a preset flow lower limiting value, real-time transmitting power of the wireless router is reduced, resource consumption of the wireless router is reduced on the premise that the signal transmitting quality is not affected, and space radiation quantity is reduced.

The invention discloses a urea liquid level sensor. The urea liquid level sensor comprises a connecting piece connected with a urea box, and a guide tube arranged on the connecting piece; a magnetic floater capable of moving up and down is sleeved outside the guide tube; a measuring circuit controlled by the magnetic floater is sealed inside the guide tube; a signal transmission line connected with the measuring circuit is arranged on the connecting piece; the measuring circuit comprises a plurality of groups of magnetic control units arranged along a length direction of the guide tube; each group of the magnetic control units comprises a resistor and a non-contact switch which are connected in series; the plurality of groups of magnetic control units are connected in parallel with one another on the circuit; and one end of the parallel circuit is a grounding end, and the other end of the parallel circuit is a signal output end. The sensor cannot be influenced by outside factors and pressure, has rather reliable stability, can output a plurality of paths of liquid level signals and is applicable to various instruments.

Embodiments of the invention disclose a method for reducing network port radiation, a port impedance matching circuit and a device. Wherein, the port impedance matching circuit includes a first resistor (RY1), a second resistor (RY2), a third resistor (RY3) and a first capacitor (CY1), one side of the first resistor is connected with a center tap of a network port transformer, and the other side thereof is connected with the first capacitor and the third resistor, one side of the second resistor is connected with an RJ45 idle wire, and the other side thereof is connected with the third resistor, one side of the first capacitor is connected with the first resistor and the third resistor, and the other side thereof is connected to the ground. The method for reducing network port radiation, the port impedance matching circuit and the device can solve the RE over standard problem of the network port caused by different LSW schemes with rather low costs and without influencing the quality of signals.

The invention provides a connecting piece and a connection status detection method for the same. A connection self-checking module is additionally arranged on the connecting piece, and comprises an alarming device and a first resistor. The first end of the first resistor is connected with a power supply, and the second end of the first resistor is connected with the first end of the alarming device. The second end of the alarming device is grounded, and the first end of the alarming device is also grounded after being connected with at least two preset detection terminals positioned on a first connector or a second connector, or the second end of the alarming device is grounded after being connected with the preset detection terminals positioned on the first connector or the second connector, so that the alarming device transmits an alarming signal according to the connection condition of the connecting piece. Therefore, whether the connecting piece is connected and conducted or not can be automatically detected. The connection self-checking module of the connecting piece is simple in structure, small in size, low in cost and easy to popularize.

The invention relates to a Bragg diffraction principle-based optical packet switching system and a Bragg diffraction principle-based optical packet switching method. The system comprises an optical packet generating module, an optical payload and optical label separation module, a label processing module and an optical switching module, wherein an optical packet generated by the optical packet generating module enters the optical payload and optical label separation module after passing through a fiber and then is separated into two paths of optical payload and one path of optical label, a routing control signal is output to the optical switching module after the optical label and one path of optical payload enter the label processing module, and the other path of optical payload directlyenters the optical switching module and is output according to the routing control signal. The system and the method have the advantage of high transmission efficiency.

The invention discloses an automatic gain control (AGC) device for a global system for mobile communication (GSM) digital optical fiber frequency-selecting repeater and a quick adaptive time slot method for the AGC device. The AGC device comprises a core logic processing device, a coprocessor, an analog / digital converter (ADC), a radio frequency (RF) numerical control attenuator, an RF frequency mixer and a low noise amplifier. The quick adaptive time slot method for the AGC device comprises an adaptive time slot recovering process and a quick automatic gain control process. The invention has the advantages that a time slot recovering threshold value is calculated adaptively, the steps of installing and debugging by engineering staff are reduced, a signal level input into the ADC can be adjusted to a target level value by the adjusting process, an overall adjusting period is short, signal quality is not influenced substantially, the gain balance of an uplink and a downlink which have small signal time slots can be ensured, and the connection quality of users is ensured.

The invention belongs to the technical field of mobile communication, and discloses a universal standing-wave ratio detection method for a TDD-LTE RRU and an FDD LTE RRU. The method comprises the steps that the delay time of a downlink signal and forward and reverse link signals is acquired; configuration information of a cyclic prefix and the time of a PBCH signal are acquired; a CPU switches a switch of a feedback link to be in a forward direction; an FPGA acquires a forward signal; the FPGA truncates out the PBCH signal through a 1.08M-bandwidth digital filter at a signal center frequency point, reads the PBCH signal and converts the PBCH signal to obtain a forward power value; the CPU switches the switch of the feedback to be in a reverse direction; a reverse power value is obtained ina similar way; a return loss value is acquired; calibration is conducted according to a return loss calibration value to obtain an actual return loss value; and a standing-wave ratio detection resultis acquired. According to the method, standing-wave ratio detection on the TDD-LTE RRU and standing-wave ratio detection on the FDD LTE RRU FDD LTE RRU can be achieved simultaneously, and the detection accuracy can be guaranteed.

The invention discloses an insulator pollution flashover leakage current signal sparse representation method based on wavelet analysis in the technical field of electric power system signal processing. The method comprises the steps that a sym8 orthogonal wavelet basis is adopted as a sparse basis psi, a wavelet sparse transformation orthogonal matrix is constructed, and the sparseness K of original leakage current signals is determined; a Gaussian random matrix fai is constructed and used as a measurement matrix, a measurement value M is calculated according to the sparseness K, and a measurement vector y and a sensing matrix theta are obtained through a sparse representation equation; the original leakage current signals are reconstructed through the measurement vector y and the sensing matrix theta under an OMP algorithm. According to the method, the requirement for sensor sampling frequency is lowered, the sampling and reconstruction speed of the signals is improved on the premise of not influencing signal quality, and meanwhile reconstruction accuracy is guaranteed.

The invention provides a non-cooperative interference cancellation device and method for partial frequency band protection. The device comprises a microwave delay line, a synthesizer, a coupler, N auxiliary antennas, N + 1 down converters, N + 1 analog-to-digital converters, a digital signal processing unit, a digital-to-analog converter and an up converter, N is greater than or equal to 1, interference cancellation processing is carried out in an analog domain, and adaptive beam forming is carried out in a digital domain, and anti-interference processing of partial frequency points in a wide working frequency band is realized. The method provided by the invention can be used for interference protection of part of narrowband frequency points in a wide working band without influencing other signal frequency points which are not interfered, can avoid the problem of high-speed sampling of broadband signals, reduces the requirement on the sampling rate of a digital-to-analog converter, and greatly improves the receiving signal-to-noise ratio index; and beam forming signal processing can be realized in a digital domain under the conditions of a complex multi-path environment and a large number of antennas, so that the anti-interference performance is improved.

The invention relates to an optoelectronic integration block for an incremental photoelectric encoder and belongs to the field of optoelectronic integration blocks of photoelectric encoders. According to the optoelectronic integration block for the incremental photoelectric encoder, a locating column is fixedly connected with a shell body, a lead wire is fixedly connected with the shell body, a point light source and an aspherical lens are respectively located on the lower portion inside the shell body, an array photocell is fixedly connected with a circuit board, and the circuit board is arranged on the upper portion inside the shell body. The optoelectronic integration block for the incremental photoelectric encoder has the advantages of being novel in structure, convenient to install and debug, capable of improving production efficiency, and beneficial to scale production.

The invention discloses an optimum design method applied to an industrial camera circuit board, relates to the field of an industrial camera circuit system and solves the problem that an existing industrial camera is realized by two circuit boards, so the existing industrial camera is large in size, high in production cost and low in utilization rate. An FPGA control chip and an image sensor socket are laid out at the front central position and the back central position of the same circuit board. The image sensor socket is a structure packaged through BAG. The middle of the image sensor socket is hollowed. An image sensor is plugged into the image sensor socket. The image sensor and the FPGA control chip are directly connected through the circuit board. A filter capacitor of the FPGA control chip is laid out at the hollowed position of the image sensor socket. The image sensor and the FPGA control chip are optimally designed on one circuit board, so the size of one circuit board is reduced, and moreover, an area occupied by a connector is removed. According to the method provided by the invention, the features such as a small size, the light weight, the low cost, the high reliability and a replicable sensor of the industrial camera are satisfied.

The invention belongs to the technical field of optical communication, and discloses an emitted light power monitoring device and a preparation method thereof, and the device comprises a laser, a detector body, a detector insulation carrier, and a PCB. The PCB is provided with a differential signal line and a bonding pad. The laser is connected with the laser driver through the differential signalline; the detector insulation carrier is arranged between the laser and the laser driver and is in contact with the PCB; the first partial area of the back surface of the detector body is attached tothe second surface of the detector insulation carrier, the photosensitive surface of the detector body faces the backlight end of the laser, and the detector body and the PCB are spaced by a first distance; a gold plating area is arranged on the second surface of the detector insulation carrier; the detector body is connected with the gold plating area, and the gold plating area is connected withthe bonding pad of the PCB. The problem that a transmitting optical power monitoring scheme in the prior art cannot be suitable for an optical module product adopting a COB packaging process is solved, and reliable optical power monitoring can be realized.

The invention is suitable for the field of computers, and provides a circuit structure for a high-density printed circuit board (PCB). The circuit structure comprises a ball grid array-packaged electron device, wherein a measuring point is arranged at the position of a through hole in a PCB wiring region below the ball grid array-packaged electron device; the PCB around a conductor layer at one end of the through hole is covered with a solder resist layer; the through hole is fully filled with the solder resist layer and is exposed out of the outer ring part of the conductor layer at one end of the through hole to form the measuring point; and the conductor layer at the other end of the through hole and the PCB around the conductor layer are covered with the solder resist layer. According to the circuit structure, the measuring point is arranged in the through hole in the back surface of a ball grid array (BGA) electron device, so that the area of the PCB is reduced under the condition that the PCB is finite in area and relatively high in integration level; testing of a circuit is facilitated; and meanwhile, the signal quality of a PCB circuit is not affected.

The predicting parallel branched amplitude limiter and amplitude limiting method is applied in adaptive determining feedback equalizer. The predicting parallel branched amplitude limiter includes n-th power of M amplitude limiters; the first multiplexer and n serially connected delay units. The amplitude limiting method includes the following steps: receiving one signal to be processed and n-th power of M defaultings and performing addition operation to obtain n-th power of M output signals; limiting the amplitudes of the said output signals to output n-th power of M amplitude-limiting signals; and selecting one from the said amplitude-limiting signals for output based on n selecting signals of different delay time.

The invention discloses an automatic gain control (AGC) device for a global system for mobile communication (GSM) digital optical fiber frequency-selecting repeater and a quick adaptive time slot method for the AGC device. The AGC device comprises a core logic processing device, a coprocessor, an analog / digital converter (ADC), a radio frequency (RF) numerical control attenuator, an RF frequency mixer and a low noise amplifier. The quick adaptive time slot method for the AGC device comprises an adaptive time slot recovering process and a quick automatic gain control process. The invention has the advantages that a time slot recovering threshold value is calculated adaptively, the steps of installing and debugging by engineering staff are reduced, a signal level input into the ADC can be adjusted to a target level value by the adjusting process, an overall adjusting period is short, signal quality is not influenced substantially, the gain balance of an uplink and a downlink which have small signal time slots can be ensured, and the connection quality of users is ensured.

The invention relates to a video monitoring system and an implementation method thereof. The video monitoring system comprises a data acquisition module, a data processing module and a monitoring module; the data processing module comprises a data storage unit, a digital-to-analogue conversion unit and a data encryption unit; the monitoring module comprises an analogue-to-digital conversion unit and a data decryption unit; the data acquisition module is used for acquiring a digital video signal, and sending the acquired digital video signal to the data processing module; the data processing module is used for analyzing the digital video signal or transmitting the video signal to the monitoring module or sending an alarm instruction to the monitoring module; and the monitoring module is used for receiving the video signal or the alarm instruction or monitoring the digital video signal in real time. By means of the video monitoring system and the implementation method thereof disclosed by the invention, the acquired video image is analyzed and processed; workers can check a video image having a problem; furthermore, the transmitted video signal is encrypted; and the security of the video signal is ensured.

The invention relates to an NFC coil driving device, a method and electronic equipment. The NFC coil driving device includes an NFC coil and a display driving chip. The NFC coil is connected to a display driver chip, and the NFC coil is used for data transmission; the display driver chip is provided with an NFC driver module, and the display driver chip is used to receive NFC drive signals, and generate clock pulses according to the NFC drive signals The signal, through the NFC driver module, converts the clock pulse signal into a corresponding frequency and outputs it to the NFC coil, and drives the NFC coil for data transmission. By setting a simple NFC driver module in the display driver chip, it is possible to drive the NFC coil for data transmission through the display driver chip, as long as the clock signal can be converted into the corresponding frequency, it is easy to drive the NFC coil for data transmission , and the size of the display driver chip is small, and there is no additional NFC module, which reduces the space occupied by the NFC module.

The invention discloses a satellite communication system and a backward calibration method of the satellite communication system. According to the satellite communication system, a coupling network is added on the back face of a backward receiving antenna, correction signals are generated from a ground station in a spread spectrum mode, the correction signals are accessed to the coupling network after being received and processed forwards by a satellite, and then the correction signals are coupled to each backward data receiving channel and transmitted to the ground station along with backward user data; the ground station carries out dispreading processing on the spread spectrum correction signals to obtain time delay information, amplitude information and phase information of the channels, and therefore backward calibration is completed. According to the satellite communication system and the backward calibration method of the satellite communication system, multiple calibration stations are not needed, and therefore the complexity of system maintenance is reduced; the spread spectrum correction signals are generated on the ground instead of being directly generated on the satellite, and therefore the amount of equipment on the satellite is reduced; the signals in the spread spectrum mode are adopted, so on-line calibration of user transmission will not be interrupted.

The invention belongs to the field of optoelectronic technology, in particular to an optical transceiver module with high coupling efficiency. The optical transceiver module includes an upper box board, a lower box board, and a DIN-type interface laser; a part of the DIN-type interface laser is installed on the upper box board In the cavity formed with the lower box plate, the other part extends out of the cavity; the DIN-type interface laser includes a DIN-type interface, a first sleeve, a second sleeve, a third sleeve, a ceramic core and a laser; the third The sleeve, the second sleeve and the first sleeve are sleeved in sequence; the ceramic core is sleeved inside the first sleeve, the second sleeve and the third sleeve, and the laser is located behind the ceramic core. The invention adopts multi-stage sleeves, and uses epoxy glue to reinforce the sleeves, so that the stress of high temperature deformation is released to the non-rigid connection between the laser and the circuit board through transmission, so as to avoid the external temperature affecting the optical transmission and reception. The influence of the output optical power of the module ensures that the output optical power remains stable within a certain temperature range.

The invention provides a non-cooperative interference cancellation device and method for partial frequency band protection. The device includes a microwave delay line, a synthesizer, a coupler, N auxiliary antennas, N+1 down-converters, N+1 analog-to-digital converters, a digital signal processing unit, a digital-to-analog converter, and an up-converter, Where N is greater than or equal to 1, by performing interference cancellation processing in the analog domain and adaptive beamforming in the digital domain, the anti-interference processing of some frequency points in the wide operating frequency band is realized. The method provided by the invention can be used for the interference protection of some narrowband frequency points in the wide working frequency band without affecting other undisturbed signal frequency points, which can avoid the problem of high-speed sampling of broadband signals and reduce the sampling rate of digital-to-analog converters. Requirements, the receiving signal-to-noise ratio index is greatly improved; and the beamforming signal processing under the complex multipath environment and a large number of antennas can be realized in the digital domain, and the anti-interference performance is improved.

The invention discloses a surge protection circuit of a video input signal, comprising a capacitor C1, a discharge tube T1 and three resistors R1, R2 and R3, wherein the resistor R1, the resistor R3 and the coupling capacitor C1 are connected to a video input circuit in series; one end of the discharge tube T1 is connected with a video input line at the front end of the resistor R1, and the other end of the discharge tube T1 is grounded; and one end of the resistor R2 is connected with the back end of the resistor R1 and the other end of the resistor R2 is grounded. The surge protection circuit can protect video AD devices at the same time of not influencing signal quality and avoids the devices from being burnt due to surge impact. The surge protection circuit is provided with one discharge tube and four capacitance resistance elements, and the structure is simple.

A transceiver arrangement includes a first receive path with a first connection and a first receive amplifier, and a second receive path with a second connection, a second receive amplifier, and a frequency conversion device. A controllable coupling device is configured to couple an output of the first receive amplifier to an input of the frequency conversion device on the second signal path. Furthermore, the transceiver arrangement includes a control circuit configured to deliver a control signal to the coupling device for combining signals delivered by the first and second receive amplifierin the correct phase based on a signal supplied by the receive paths. This achieves receive diversity wherein, on the one hand, additional external components are no longer necessary.

The invention belongs to the technical field of optical communication, relates to a semiconductor laser array packaging structure and solves a packaging problem of semiconductor laser array chips. N laser chips are all mounted with the back side facing up to a front side of a substrate, n MPDs are mounted on the front side of the substrate, n coupling capacitors and n matching resistors are mounted on a back side of the substrate, an EA pad and a gain pad of each laser chip are sequentially connected with the outside of the substrate through a metallized wire and a gold wire respectively, then MPDs are connected with the outside of the substrate through gold wires, each metallized through hole is connected with the EA pad of one laser chip, each metallized through hole is connected with one end of each coupling capacitor through a metalized wire, and the other ends of the coupling capacitors are respectively connected with the matching resistors through metallized wires. The packagingstructure is advantaged in that the packaging structure can be applied to any external modulated laser array optical devices.

The invention relates to a predictive parallel branch limiter and a limiter method, which are applied in an adaptive decision feedback equalizer, and the predictive parallel branch limiter includes: an adder of fixed coefficients of the nth power of M; n-th power limiters; a first multiplexer and n delay units connected in series; the method comprises the following steps: after receiving a signal to be processed and M default values ​​of the n-th power, adding them respectively After the operation, output signals to the nth power of M are obtained, and M is an integer greater than 1; the above-mentioned output signals are respectively received and subjected to limiting processing, and then output to the nth power of M respectively. level limiting signal; and outputting one of the above limiting signals according to n selection signals with different delay times.

The invention discloses a bidirectional buffer circuit for two-wire serial interfaces, and relates to the field of analog integrated circuit design. The bidirectional buffer circuit comprises a bus master, a bus slave and a bidirectional buffer, wherein the bus master comprises a master data bus SDAM which is connected with a power supply VDM through a pull-up resistor RM and grounded through a stray capacitor CM; the bus slave comprises a slave data bus SDAS which is connected with the power supply VDS through a pull-up resistor RS and grounded through a stray capacitor CS; the bidirectionalbuffer comprises a buffer BUF1, a BUF2 and a switch signal CNCT; both output of the buffer BUF2 and input of the buffer BUF1 are connected with the master data bus SDAM when being connected with eachother; both output of the buffer BUF1 and input of the buffer BU2 are connected with the slave data bus SDAS when being connected with each other; and the switch signal CNCT is used for controlling the opening and closing of the buffer BUF1 and the buffer BUF2. According to the bidirectional buffer circuit, when bus wiring distances are relatively long or slaves connected on buses are too many, the bus signal quality is not influenced.

The invention belongs to the technical field of photoelectricity, and particularly relates to an optical transceiver module with the high coupling efficiency. The optical transceiver module comprisesan upper box board, a lower box board and a DIN type interface laser; a part of the DIN type interface laser is installed in a cavity formed by the upper box board and the lower box board, and the other part extends out of the cavity; the DIN type interface laser comprises a DIN type interface, a first sleeve, a second sleeve, a third sleeve, a ceramic core and a laser; the third sleeve, the second sleeve and the first sleeve are sequentially connected in a sleeved mode; the ceramic core is connected into the first sleeve, the second sleeve and the third sleeve in a sleeving mode; and the laser is located behind the ceramic core. According to the optical transceiver module, the multi-stage sleeves are adopted, and epoxy glue is used for performing reinforcement among the sleeves, so that astress of high-temperature deformation is released to a non-rigid joint between the laser and a circuit board through transmission, the influence of the external temperature on the output optical power of the optical transceiver module is avoided, and the output optical power is kept stable within a certain temperature range.

The invention belongs to the technical field of optical communication, and discloses an emitted light power monitoring device and a preparation method thereof, and the device comprises a laser, a detector body, a detector insulation carrier, and a PCB. The PCB is provided with a differential signal line and a bonding pad. The laser is connected with the laser driver through the differential signalline; the detector insulation carrier is arranged between the laser and the laser driver and is in contact with the PCB; the first partial area of the back surface of the detector body is attached tothe second surface of the detector insulation carrier, the photosensitive surface of the detector body faces the backlight end of the laser, and the detector body and the PCB are spaced by a first distance; a gold plating area is arranged on the second surface of the detector insulation carrier; the detector body is connected with the gold plating area, and the gold plating area is connected withthe bonding pad of the PCB. The problem that a transmitting optical power monitoring scheme in the prior art cannot be suitable for an optical module product adopting a COB packaging process is solved, and reliable optical power monitoring can be realized.