18 results about "Multi channel" patented technology

The invention discloses an analog circuit for detecting the wire breaking of a displacement sensor LVDT, which comprises a displacement sensor LVDT, wherein a primary coil of the displacement sensor LVDT is connected with an excitation signal source. The analog circuit for detecting the wire breaking of the displacement sensor LVDT is characterized in that the output ends of the secondary coils of the displacement sensor LVDT are respectively connected with a test signal and are respectively connected with a multi-channel selection switch through a filter and rectifier circuit, and predetermined different groups and combinations of wire breaking voltages which are output when an LVDT is disconnected are simultaneously connected with the multi-channel selection switch; the two output end voltages of the secondary coils of the LVDT are respectively combined with a group of comparison voltages to be connected with each comparator, and each comparator is connected with the output control end of the multi-channel selection switch through an arithmetic logic OR unit, and the multi-channel selection switch is simultaneously connected with a servo amplifier. The invention can directly achieve the detection of wire breaking state only by a hardware circuit, and the method is simple and reliable.

The present invention discloses a multi-channel aerosol scattering absorption measuring instrument, comprising a light path device, a detection device and a gas path device. The light path device supplies three different wavelengths of laser entering the detection device in sequence; the detection device is provided with photoelectric detectors at multiple angles for measurement, so as to reduce the measurement error of aerosol scattering coefficient; the gas path device comprises a sample loading unit, a calibration unit and a sample discharging unit; and a light source from the light path device and a gas flow from the gas path device enter the photoacoustic cavity of the detection device respectively and are detected by a control unit. The aerosol scattering absorption measuring instrument of the present invention is characterized by multi-channel, multi-angular, full-scale and direct measurement of scattering phase function and absorption coefficient of aerosol particles, combines the function of synchronously acquiring the optical parameters of an aerosol (such as scattering coefficient, extinction coefficient, visibility, transmittance, single scattering albedo, etc.), and achieves the integrated on-line detection of different optical parameters of an aerosol with high automation degree and good stability.

The invention discloses an FPGA implementation method of a multi-channel data source DDR buffer, including: hanging a plurality of DDR granules with the FPGA, randomly configuring the number of channels, and then arbitrating the DDR reading and writing of each channel, wnerein the arbitration rule is an arbitration rule through polling or matching the bandwidth. The invention buffers the data of each channel to the address space corresponding to each channel of the DDR, the address space size of each channel can be arbitrarily divided, the total address space size is the sum of the memory space of each DDR granule, and the channel data and the DDR are respectively transferred through asynchronous fifo. The invention flexibly and efficiently uses a plurality of DDR granules to carry out read-write arbitration on each channel, can carry out handover on the terminal domain channel when expanding a plurality of asynchronous clocks, flexibly matches the address space mapped by the cache DDR, and centralizes the cache data bandwidth of the plurality of DDRs to cache the arbitrated channel.

The invention discloses a soot-blowing control device for a boiler furnace based on heat flow online measurement, which comprises a heat flow sensor, a multiplexer, a data collector and an industrial personal computer, wherein the heat flow sensor is arranged on a film-type water wall fin at the periphery of the boiler furnace and connected to the input end of the multiplexer and used for transmitting collected heat flow to the multiplexer; the multiplexer is sequentially connected with the data collector and the industrial personal computer and used for multi-channel switching, signal amplifying and filtering; the data collector is used for converting a heat flow analog signal to a digital signal; and the industrial personal computer is used for analyzing the digital signal transmitted from the multiplexer and sending a soot-blowing signal. The invention can be used for various coal-fired power plants; and according to fouling conditions of heating surfaces in each region of the boiler furnace, realizes the sweeping in a demand quantity for the required region, improves the accuracy and the real time of fouling diagnosis for the heating surfaces of the boiler furnace, reduces the boiler failure, prolongs the lifetime of a soot-blower, saves the maintenance workload of the soot-blower, and the like.

The invention discloses a failure prediction method based on ICA reconstruction, which includes the following steps: step 1, calculating a separative matrix W; step 2, calculating the statistic value I<2>(k), SPE(k) or I<2>e(k) of the real-time data Xnew(k) through adopting the formulas I<2>(k)=S'newd(k)<T> S'newd(k), I<2>e=S'newe(k)<T>*S'newe(k), SPE(k)=(xnew(k)-x'new(k))<T>*(xnew(k)-x'new(k)), S'newd(k)=Wd*xnew(k), and S'newe(k)=We*xnew(k), wherein Wd refers to the matrix formed by the lines expect the first d lines of the separative matrix W, We refers to the matrix formed by the lines except the first d lines of the separative matrix W, and X'new(k)=Q<-1>BdWd*xnew(k), Bd=(WdQ<-1>)<T>, Be=(WeQ<-1>)<T>, and Q refers to a whitening matrix; and step 3, calculating the nuclear density of I<2>(k), SPE(k) or I<2>e(k), and detecting failures as per the control limit. The method provided by the invention solves the problem that the traditional flue gas turbine prediction method can not utilize the multidimensional valid data, takes the multi-channel vibration data into consideration, can be used for directly predicating failures, and improves the prediction accuracy compared with the PCA reconstruction method.

The invention discloses a water pollution online analysis and quick source tracing method used for strengthening supervision of wastewater discharged by enterprises in the industries of printing and dyeing, coking, electroplating, electronic manufacturing, papermaking, pharmacy, metal manufacturing and the like. According to the method, a multi-channel laser Raman online analysis and multi-channelelectrochemical online analysis combined technology is adopted to perform online analysis and monitoring on multiple types of pollutants possibly occurring in a monitored water area, and the online analyzed and monitored water pollution data is analyzed automatically by utilizing a pre-constructed pollution source database, source tracing software and a data analysis platform so as to realize online water pollution source tracing. By adopting measures such as multiple test channels, a wide-electrochemical potential window three-dimensional bismuth film alloy electrode, a modulation asymmetricsquare wave test method, a surface enhanced Raman accessory and the like, the test rate, the detection capability and the monitoring resolution capability of online analyzing and testing various types of pollutants are ensured.

The invention relates to a method suitable for continuously preparing a high-temperature superconductive belt material, which comprises the steps of: firstly, preparing a metal baseband; secondly, growing a compound separating layer on the metal baseband; then, growing a superconductive layer on the compound separating layer; and finally, growing a protecting layer on the superconductive layer. According to the invention, the in-situ preparation of the compound separating layer and the superconductive layer can be finished in the same coating system by adopting a multi-target multi-channel laser coating method; laser utilization rate and preparation speed of the belt material are greatly enhanced; vacuumizing time is reduced; equipment utilization rate is enhanced; and investment intensity of fixed assets is reduced so that the manufacturing cost of the high-temperature superconductive belt material is greatly reduced.

The invention relates to a data processing method and device and a related product, the related product comprises a board card, the board card comprises a plurality of artificial intelligence processors, and memories corresponding to the artificial intelligence processors are multi-channel memories; Wherein the target artificial intelligence processor is used for receiving an artificial intelligence processor calculation instruction sent by a universal processor CPU through a target parallel thread and then passing through a memory channel corresponding to the target parallel thread. By adopting the method, smooth operation of the user-defined activation function in the neural network processor can be realized.

The invention provides a transponder aging test system comprising message reading-writing tools, multi-channel C interface output tools, an upper computer and serial port servers. The upper computer communicates with the message reading-writing tool by the serial port server. Each transponder corresponds to one message reading-writing tool; and the message reading-writing tools are able to carry out message reading and writing testing on default message parts of passive transponders or active transponders. Built-in messages are arranged in the multi-channel C interface output tools; and the multi-channel C interface output tools are controlled to be turned on or off by upper computer software and send messages to the active transponders. The upper computer software controls on/off of message sending of the multi-channel C interface output tools and controls the message reading-writing tools to carry out message reading and writing testing. The system is able to monitor the running states of multiple transponders in real time; high-efficiency batched aging testing is realized; and the integration of the system is improved greatly.

The invention relates to a currency counting and detecting machine technology, in particular to a currency counting and detecting machine with the automatic brightness calibration function. In the prior art, the defects that image quality of a currency counting and detecting machine is unstable, a user cannot conveniently use the currency counting and detecting machine, and the maintenance cost is high exist. According to the currency counting and detecting machine with the automatic brightness calibration function, a control circuit comprises a digital signal processing chip DSP, an FPGA, multi-channel enhancement type field-effect transistors, programmable digital potentiometers and an AD conversion chip, wherein the digital signal processing chip DSP and the FPGA are connected through an EMIF, the multi-channel enhancement type field-effect transistors are connected with a general I/O port of the FPGA, the programmable digital potentiometers are connected between the multi-channel enhancement type field-effect transistors and a CIS in series, the input end of the AD conversion chip is connected with the signal output end of the CIS, and the output end of the AD conversion chip is connected with the FPGA through the general I/O port. The currency counting and detecting machine with the automatic brightness calibration function has the advantages that image quality of the currency counting and detecting machine is improved, the maintenance cost is reduced, and operation and use are convenient.

The invention discloses a wireless type-based soil temperature and moisture gradient measuring system. The soil temperature and moisture gradient measuring system comprises sensor groups consisting of soil temperature sensors and soil moisture sensors, wherein each sensor group is arranged in a vertical gradient direction of soil to be measured, a sensor node is formed by multiple sensor groups in the same vertical gradient direction through an analog-digital conversion channel, a node transmission network is formed by a ZigBee wireless network and a routing node between every two sensor nodes, the node transmission network is connected with a central acquisition node through a multi-channel analog switch to form a star topology structure, and the central acquisition node carries out internal storage and precision calibration on data transmitted by the sensor node, and transmits the processed data to a data display terminal through an RS232/RS485 communication interface for observation and analysis. By adopting the technical scheme of the invention, the measurement of three-dimensional soil temperature and moisture is achieved, and each sensor node is used for wireless transmission of data, so that the energy consumption is low, and the applicable occasions are wide.

The invention discloses a non-gaussian integer digital multi-channel pulse analyzer of a spectrograph. A pre-amplified signal is directly sampled and subjected to amplitude analysis. Due to the fact that the pre-amplified signal is used as a sampled signal, the rising edge is fast and less than 300ns in general; a falling edge is slow and not greater than 20mus in general; the overlapping opportunity of peak positions of the rising edge is fewer under the condition of high counting rate; the lowest point and the highest point of the rising edge are tracked in novel multi-channel pulse analysis, and the difference value between the highest point and the lowest point is a multi-channel value correspondingly. Compared with the previous analysis method, the effect of baseline noise on the peak position is small; the method for judging peaks adopts continuous signal amplitude rising for three times; a peak is determined when the value is greater than a fixed value, and either noise or a real peak can be easily distinguished.

A 12-bit A/D converter card is composed of analog multi-channel switch, A/D converter, single-chip processor PIC16, photoelectric isolating circuit, FIFO memory, and programmable GAL logic circuit. The single-chip processor is used to control the timing of A/D conversion and FIFO memory is used as data buffer for visualized programming control in windows operating system. The correct timing sample can be realized without interruption. The waveform of the signal sampled can be real-time displayed. Its advantages high safety and reliability, convenient application and wide adaptability.

The invention provides a microwave receiving and transmitting channel assembly. The assembly comprises a local oscillator module and a channel module. The local oscillator module is provided with at least one local oscillator signal connection hole. The channel module is provided with the channel signal connecting holes corresponding to the local oscillator signal connecting holes, the local oscillator signal radio frequency connecting seats are arranged in the local oscillator signal connecting holes, the channel signal radio frequency connecting seats are arranged in the channel signal connecting holes, and the local oscillator module is connected with the channel module through a radio frequency connector. The beneficial effects of the present invention are that a split microwave receiving and transmitting channel assembly is provided, the local oscillation module of the microwave receiving and transmitting channel assembly is connected with the channel module in a plug butt joint mode, the isolation index of the channel module and the local oscillation module is guaranteed, and meanwhile the size of the multi-channel microwave receiving and transmitting channel assembly is greatly reduced.

The invention provides a multi-channel filter. The multi-channel filter comprises an upper cylinder body and a lower cylinder body, a through hole a is arranged at the top of the upper cylinder body,and the through hole a sleeves a partial flow filter. The partial flow filter includes a feeding pipe, a liquid collecting chamber, and diverting pipes, the feeding pipe fits the size of the through hole a, and the liquid collecting chamber is internally hollow, and is in the shape of a circular table, the upper end face of the liquid collecting chamber is open, and is fixedly connected with the feeding pipe, and the lower end surface of the liquid collecting chamber i is provided with a plurality of openings. The openings are fixedly connected with the plurality of diverting pipes. The diverting pipes are hollow inside, and filter holes a are uniformly formed on the sidewalls and the bottom surface of the diverting pipes. The multi-channel filter can optimize the filtering step of raw materials and improve the filtering effect. The multi-channel filter has the advantages of simple structure, convenient cleaning and strong practicability.

The invention discloses a mine tunnel soil pressure acquisition system. The system comprises a plurality of pressure sensors, a multi-channel amplifier, a multi-channel A/D converter, a processor, a FLASH storage module, a wireless communication interface module and a wireless charging module; the plurality of pressure sensors are used for outputting a plurality of acquired pressure data signals to the multi-channel amplifier; the multi-channel amplifier is used for amplifying the plurality of pressure data signals and outputting the amplified pressure data signals to the multi-channel A/D converter; and the multi-channel A/D converter is used for converting the amplified pressure data signals into digital signals and outputting the digital signals to the processor; the processor is used for processing the digital signals, and outputting the processed pressure data to the FLASH storage module and the wireless communication interface module; the FLASH storage module is used for storingthe processed pressure data; the wireless communication interface module is used for outputting the processed pressure data to the outside; and the wireless charging module is used for charging the processor. With the system adopted, the work efficiency of pressure detection can be improved.