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31results about How to "Implementation method is flexible" patented technology

Distributed coal mine rock burst monitoring method

The invention relates to a distributed coal mine rock burst monitoring method, belonging to a ground pressure monitoring method. The existing industrial Ethernet in a coal mine integrated automation system can be used for information transmission, a network sensor provided with an Ethernet interface is connected with a network, multiple measurements such as electromagnetic radiation, acoustic emission, micro-shock and the like which are used for reflecting signals of rock burst can be carried out, the measurement signals are transmitted into a host machine for monitoring the rock burst through the industrial Ethernet, and the host machine is used for analyzing, processing and locating a seismic source so as to realize rock burst monitoring; a main core of the network sensor is a singlechip provided with an Ethernet controller, and the measurement of three signals of electromagnetic radiation, acoustic emission and micro-shock can be realized by analog-to-digital conversion through three channels; and each sensor has the respective IP address. The method can be used for extracting features of various signals, carrying out event relativity analysis, extracting data fusion and event general features with different information, locating the seismic source and providing the analysis result of rock burst event.
Owner:CHINA UNIV OF MINING & TECH +1

Closed space panel acoustic contribution degree identification method based on local measurement

The invention discloses an enclosed space panel acoustic contribution degree identification method based on local measurement, and the method comprises the steps: setting two semi-enclosed holographicmeasurement surfaces in an enclosed space, and measuring the sound pressure values of the holographic measurement surfaces; based on an acoustic equivalent source principle, establishing an outer sound field virtual source surface and an inward sound field virtual source surface in the closed space, establishing a transfer relationship between the holographic measurement surface and the sound field virtual source surface, and calculating a source intensity column vector on the inward sound field virtual source surface; utilizing the admittance boundary condition of the surface of the to-be-measured vibration panel and the source intensity column vector on the inward sound field virtual source surface to calculate a scattering sound field generated when the inward sound field virtual source surface is incident to the surface of the to-be-measured vibration panel, and restoring the sound pressure and the normal vibration speed on the to-be-measured vibration panel under the free field condition; dividing the to-be-measured vibration panel into a plurality of discrete units, and calculating the acoustic contribution degree of the to-be-measured vibration panel to the closed sound field. According to the method, the local acoustic contribution degree of the closed space structure panel can be flexibly and quickly identified.
Owner:NANCHANG INST OF TECH

A duplexing filter circuit and an implementation method

InactiveCN105322907AReduce volumeIncrease or decrease orderMultiple-port networksCapacitanceRadio frequency signal
The invention provides a duplexing filter circuit and an implementation method. A filter circuit between a Term 1 port and a Term 2 port is a reciprocal network, and the Term 1 port serves as an input port while the term 2 port serves as an output port and vice versa. A radio frequency signal RF1 is input from the Term 2 port and is output from the Term 1 port via high frequency capacitors; or the radio frequency signal RF1 is input from the Term 1 port and is output from the Term 2 port via the high frequency capacitors. A filter circuit between the Term 1 port and a Term 3 port is a reciprocal network, and the Term 1 port serves as an input port while the term 3 port serves as an output port and vice versa. A frequency signal RF2 is input from the Term 3 port and is output from the Term 1 port via high frequency inductors; or the frequency signal RF2 is input from the Term 1 port and is output from the Term 3 port via the high frequency inductors. For high frequency circuits within the short-wave and ultrashort-wave frequency range, two paths of radio frequency signals with different frequencies can be isolated from each other and share transmitting and receiving antennas; if the power of any one path of radio frequency signals is attenuated by more than 60dB in the frequency range of the other path of radio frequency signals, the isolation between the two paths of radio frequency signals exceeds 60dB.
Owner:TOEC TECH

Distributed coal mine rock burst monitoring method

The invention relates to a distributed coal mine rock burst monitoring method, belonging to a ground pressure monitoring method. The existing industrial Ethernet in a coal mine integrated automation system can be used for information transmission, a network sensor provided with an Ethernet interface is connected with a network, multiple measurements such as electromagnetic radiation, acoustic emission, micro-shock and the like which are used for reflecting signals of rock burst can be carried out, the measurement signals are transmitted into a host machine for monitoring the rock burst through the industrial Ethernet, and the host machine is used for analyzing, processing and locating a seismic source so as to realize rock burst monitoring; a main core of the network sensor is a singlechip provided with an Ethernet controller, and the measurement of three signals of electromagnetic radiation, acoustic emission and micro-shock can be realized by analog-to-digital conversion through three channels; and each sensor has the respective IP address. The method can be used for extracting features of various signals, carrying out event relativity analysis, extracting data fusion and event general features with different information, locating the seismic source and providing the analysis result of rock burst event.
Owner:CHINA UNIV OF MINING & TECH +1

A three-dimensional laser scanning device control system

A control system of a three-dimensional laser scanning device disclosed by the present invention comprises a laser ranging module, a power supply module, a processor module, a motor driving and subdivision module, a mechanical rotating and scanning mechanism, an angle feedback module, a network transmission module and an upper computer. The control system integrates the functions as one, such as the laser scanning control, the data transmission, the data visualization, etc., can operate and control the three-dimensional laser scanning device to obtain the three-dimensional scene information of the space accurately, thereby enabling the physical scenes to reappear really and tridimensionally. Meanwhile, the interaction of a scanning device lower computer and the upper computer is realized, the operation personnel can send the control commands to the scanning device lower computer via the upper computer to set the parameters, such as the scanning resolution ratio, the scanning modes, etc., and the upper computer receives the point cloud data sent by the scanning device lower computer to denoise, smooth, visualize and the like. The control system disclosed by the present invention has the characteristics of being strong in feasibility, low in cost and convenient in networking.
Owner:HUAZHONG UNIV OF SCI & TECH

A Method for Recognition of Acoustic Contribution of Panels in Enclosed Space Based on Local Measurement

The invention discloses a method for identifying the acoustic contribution degree of panels in a closed space based on local measurement, which includes: setting two semi-closed holographic measurement surfaces inside the closed space, and measuring the sound pressure value on the holographic measurement surfaces; The principle is to establish the virtual source surface of the external sound field and the virtual source surface of the inward sound field in the closed space, establish the transfer relationship between the holographic measurement surface and the virtual source surface of the sound field, and calculate the source intensity column vector on the virtual source surface of the inward sound field; The admittance boundary condition of the surface of the vibrating panel to be measured and the source intensity column vector on the virtual source surface of the inward sound field are calculated, and the scattered sound field generated by the virtual source surface of the inward sound field incident on the surface of the vibrating panel to be measured is calculated to restore the The sound pressure and normal vibration velocity on the vibration panel to be measured; the vibration panel to be measured is divided into several discrete units, and the acoustic contribution of the vibration panel to be measured to the closed sound field is calculated. The invention can flexibly and quickly identify the local acoustic contribution of the structure panel in the closed space.
Owner:NANCHANG INST OF TECH

Digital peak current control device

ActiveCN104393744BMaintain speed advantageLow costPower conversion systemsMicrocontrollerPeak current
A digitalized peak current control device comprises a sampling circuit, a given circuit, a single chip microcontroller, a digital-analog converting circuit, a rectifying circuit, and a peak current control circuit; the peak current control circuit comprises a first comparator, a first latch, and a first AND gate; the single chip microcontroller comprises a first output end for outputting a first PWM signal and a second output end for outputting a second PWM signal; the single chip microcontroller is used for figuring out a digital signal based on an output voltage and an output current collected by the sampling circuit, and a reference signal output by the given circuit; the digital-analog converting circuit is used for converting the digital signal into an analog signal and outputting the analog signal to the first comparator; the rectifying circuit is used for rectifying an input current collected by the sampling circuit, and outputting the rectified input current to the first comparator via the output end of the rectifying circuit; a level signal output from the output end of the first AND gate is used for controlling the on and off states of a switch tube of a switching power supply. The digitalized peak current control device has the advantages of low cost, high reliability, and the like.
Owner:东莞市英豪智能科技有限公司

Method for rapidly constructing embedded system communication way

The invention relates to a method for rapidly constructing an embedded system communication way, which comprises that: an embedded operating system is installed in advance in an embedded target machine; cross compilation is performed on a pluggable communication service framework, a protocol plug-in, a media plug-in and a modeling tool of the pluggable communication service framework in a personal computer (PC), and a cross-compiled target program is downloaded into the embedded target machine; and the embedded target machine runs the modeling tool to perform communication channel modeling and data modeling, and runs the pluggable communication service framework to dynamically generate communication processing plug-ins of each communication channel to finish the construction of the embedded system communication way. The embedded system communication way can be online changed. For various embedded systems, a user can flexibly configure the combination of the protocol plug-ins and the media plug-ins according to embedded hardware resources to easily construct the network communication way required by the user, greatly shorten the development and debugging cycle of the communication way and bring convenience to maintenance and development.
Owner:XJ ELECTRIC +2

Centralized control device beside ship main propulsion device and control method

The invention provides a centralized control device beside ship main propulsion device and control method. The control method comprises the following steps: step 1, controlling the local centralized control device to obtain a local-level remote control authority through a host control panel; step 2, controlling a local host to be connected through the host control panel, automatically adjusting the rotating speed of the local host to a first host connecting rotating speed, and automatically connecting; and step 3, when double-engine parallel operation is needed, controlling a coaxial main engine to be connected and arranged by the host control panel, automatically adjusting the rotating speed of the coaxial main engine to the actual rotating speed of the main engine, then carrying out automatic connection and arrangement, and completing automatic synchronous parallel operation. The centralized automatic control function and state display of the local main propulsion device of the engine room are realized, the emergency control function is considered, the operation is simple and convenient, the automation degree of local control of the engine room and the operation efficiency of the main propulsion device under the emergency working condition are improved, the ship vitality is improved, and the device is especially suitable for an automatic control system of a ship main propulsion device.
Owner:HUDONG ZHONGHUA SHIPBUILDINGGROUP
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