91results about How to "Guaranteed Detection Performance" patented technology

The invention discloses a device and a method for carrying TBM (tunnel boring machine) seismic wave advanced prediction instruments. The device for carrying the TBM seismic wave advanced prediction instruments comprises a seismic wave excitation machine carrying device and a seismic wave detector carrying device. The seismic wave excitation machine carrying device comprises bases, and the bases are arranged on slide rails axially arranged along tunnels, are connected with first driving mechanisms and can move along the slide rails under the driving effects of the first driving mechanisms; the first driving mechanisms are connected with a controller; an excitation machine is mounted at the tail end of a mechanical arm, the other end of the mechanical arm is mounted on the bases, the bases can move along the slide rails under the driving effects of the first driving mechanisms, and accordingly excitation can be carried out on different cross sections by the excitation machine; the mechanical arm is connected with second driving mechanisms, and angles of the excitation machine and angles of tunnel walls can be adjusted by the mechanical arm under the effects of the second driving mechanisms, so that excitation effects can be guaranteed; the first driving mechanisms and the second driving mechanisms are connected with the controller.

The invention discloses a low-altitude target detecting system of a three-coordinate continuous wave one-dimensional phase sweeping unmanned aerial vehicle, and is aimed at providing a detecting device high in data detecting rate and anti-interference capacity. By means of the technical scheme, the system measures a target distance through a frequency modulation continuous wave ranging system, anantenna feedback subsystem converts radio frequency signals into electromagnetic wave signals to be radiated to the space, a receiving subsystem conducts amplifying, frequency varying and SFC controlprocessing on echo signals output by an emission and wave control subsystem, a signal processing subsystem generates the working time sequence of the whole system, measures the three-coordinate vectors of the distance, direction and pitching of a target position and calculates frequency modulation continuous wave ranging data of target signals, and a data processing and communication control subsystem parses the target angle, establishes the trajectory of target movement, controls the working mode of a radar and detects three-coordinate target information according to the target signals calculated by the signal processing subsystem and the antenna angle information output by the antenna control subsystem.

The invention discloses an engineering comprehensive hole measuring system and method based on in-hole camera shooting and single-hole sound waves. The engineering comprehensive hole measuring system comprises a combined measuring probe. The combined measuring probe stretches into a borehole of a rock mass, a push rod is arranged behind the combined measuring probe, the combined measuring probe is connected through a hole opening fixing device, the hole opening fixing device is arranged at the opening of the borehole, a depth sensor is arranged at the front end of the push rod, the depth sensor and the combined measuring probe are connected with a main measuring machine, and the combined measuring probe is pushed to move forwards by controlling the push rod to collect and analyze in-borehole data. The machine learning and data mining method is adopted, the decision tree algorithm, the k-means clustering algorithm and the Apriori association algorithm are utilized to analyze in-hole camera shooting and single-hole sound wave data, and the automation degree and accuracy of exploration forecasting are improved. By means of the engineering comprehensive hole measuring system and method, the workload of in-hole camera shooting and single-hole sound wave detection can be greatly reduced, and meanwhile the detection time can be shortened.

The invention discloses a phi-OTDR reinforcing method based on a polarized orthogonal optical pulse pair, wherein a polarized orthogonal optical pulse pair set is used as a detecting optical signal. After detecting light enters a sensing optical fiber, two sets of optical fiber back Rayleigh scattering curves of the orthogonal optical signals are obtained. Mean processing is performed on the two sets of curves, thereby eliminating sensitivity of an optical fiber to the polarized state of the detecting light in a phi-OTDR method, and effectively ensuring capability of a phi-OTDR system for simultaneously detecting multiple events. The invention further discloses a device according to the phi-OTDR reinforcing method based on the polarized orthogonal optical pulse pair. The device is additionally provided with a polarization maintaining switch unit in a traditional OTDR system, thereby generating the polarized orthogonal optical pulse pair which is required in detection. Furthermore a pulse generator adjusts a sequential relationship among the polarization maintaining switch unit, an acoustic-optical modulator and a subsequent data processing unit. The phi-OTDR reinforcing method and the device thereof have functions of eliminating sensitivity of the optical fiber to the polarized state of the detecting light in the phi-OTDR method, effectively ensuring the capability of the phi-OTDR system for simultaneously detecting multiple events, and greatly reducing cost of a detecting system.

The invention discloses a method and device for frequency domain balancing detection. The method comprises the steps that a noise interference covariance matrix Re-pilot of a pilot frequency sub-carrier and a noise interference covariance matrix Re-Data of a data sub-carrier are calculated; whether an interference rejection combining IRC detecting method or a maximal ratio combining MRC detecting method is adopted for conducting frequency domain balancing detection is determined through the noise interference covariance matrix Re-pilot of the pilot frequency sub-carrier or the noise interference covariance matrix Re-Data of the data sub-carrier. According to the method and device for frequency domain balancing detection, the MRC detecting method or the IRC detecting method is selected in a self-adapting mode to conduct frequency domain balancing detection so that when interference plays a leading role in signal receiving, the interference and the noise can be distinguished and the detection performance can be fully guaranteed; when the interference does not play the leading role in signal receiving, calculating accuracy decline caused by introduction of a channel evaluation error can be avoided and the detecting performance can be completely guaranteed.

The invention relates to a total-stroke and total-space transient electromagnetic device and measuring method. The device comprises a transmitting unit and a multi-channel receiving unit, wherein the transmitting unit and the multi-channel receiving unit are respectively connected with a signal processing unit, the signal processing unit is connected with a main engine through a communication unit, relevant parameters are set through operation software of the main engine, the receiving unit and the transmitting unit jointly achieve field source excitation and complete collection, recording and the like of an induction signal and an excitation source signal, the induction signal and the excitation source signal are transmitted to the main engine through an RS485, and the display, storage, management and the like of the data are achieved. According to the total-stroke and total-space transient electromagnetic device and measuring method, the self-induction and mutual induction influences can be effectively reduced, the signal to noise ratio and the sensitivity are improved, receiving coils can be combined into different types according to the detection requirement, the different detection effects can be obtained, and the judgment on the direction of an abnormal body can be achieved under the total-space situation. The number of detection blind zones can be reduced, the superficial zone detection effect can be improved, an ARM quad-core processer hardware platform is adopted, a special embedded type operation system is configured, and real-time imaging, comparison, judgment and subsequent analysis can be conveniently carried out on the measured data.

An embodiment of the invention provides a new-energy multifunctional express transport vehicle. The new-energy multifunctional express transport vehicle comprises a frame and compartment arranged on the frame and is characterized the compartment is detachably connected with the frame, and the compartment comprises a clean energy power generation system, a drone system, an identity identification system, an electric control fixing device, an electric control trampoline power assisting device and a master controller. The new-energy multifunctional express transport vehicle has the advantages that the clean energy power generation system can favorably increase energy utilization rate and is energy-saving, low-carbon and environmentally friendly; by a drone storeroom, the storage protection, efficient charging and cleaning and maintenance requirements of drones can be satisfied; the compartment can be favorably fixedly reliably and stably by designing the electric control fixing device ofthe compartment; the physical output of a user during staircase or step ascending and descending can be saved favorably by the aid of the electric control trampoline power assisting device.

The invention discloses a parameter optimization method for a communication integration signal of an asymmetric triangular frequency modulation radar. The shape of a frequency curve of the integration signal is an asymmetric triangle, and the integration signal consists of two LFM (linear frequency modulation) signals with opposite frequency modulation ratio symbols. The first signal is an LFM signal with the frequency modulation ratio k1, has no modulated communication information and is used for the synchronization or capturing of a communication signal, and the second signal is an LFM signal with the frequency modulation ratio k2, wherein k1*k2 is less than zero. Communication code element information is modulated on the second signal in a mode (-1, 1). The method is based on a parameterized model of the communication integration signal of the asymmetric triangular frequency modulation radar, and employs a fuzzy function for representing radar detection performances and a target function for representing communication performances to optimize and design the parameters of the integration signal. The method guarantees the probability of successful capturing of communication through employing a shortest synchronization signal, and guarantees an information transmission rate at a certain signal to noise ratio under the condition of guaranteeing the radar detection performances.

The invention relates to the sensing technology field and discloses a three-dimensional sensing system based on a vertical cavity surface transmission laser device array. The system comprises a signaltransmission sub-module, a signal receiving sub-module, an optical path adjustment module and a data processing module, wherein the signal transmission submodule is used for transmitting a laser signal to a target under the first condition, the signal receiving submodule is used for receiving the laser signal reflected by the target under the second condition, the optical path adjustment module is used for shaping the laser transmitted by the signal transmission sub-module into parallel light which is then transmitted to the target and used for shaping the laser reflected by the target into parallel light which is then transmitted to the signal receiving sub-module, and the data processing module is used for analyzing and processing the laser signal reflected by the target. The system isadvantaged in that both the signal transmission sub-module and the signal receiving sub-module are vertical cavity surface transmission laser device (VCSEL) arrays, the signal transmission sub-moduleand the signal receiving sub-module are integrated on the same motherboard, and the integration degree is relatively high.

The invention relates to an automatic continuous seismic method seismic source. When power is continuously input, the automatic continuous seismic method seismic source consists of an excitation device, a moving device and a power device, wherein the excitation device automatically and continuously completes excitation actions and performs the process cyclically. Time that the excitation device completes one excitation cycle is decided by input provided by the power device. When the power is continuously input, the moving device continuously moves. Moving speed of the moving device is decided by the input provided by the power device. The power device continuously and stably outputs power. The inputs provided by the power device to the excitation device and the moving device are simultaneously provided and are continuous, independent, adjustable and relatively fixed. The excitation device and the moving device are fixedly installed together. The entire seismic source device automatically and continuously operates according to design requirements of an observation system, quickly and efficiently performs exploitation and realizes quick general seismic method investigation in cities.

The invention provides an ice crystal detector, which comprises an axially extending ice crystal collecting probe and a detecting device. The ice crystal collecting probe comprises a windward surfaceon one side and a leeward surface opposite to the windward surface, and comprises a rod body, a groove and photoelectric sensors, wherein the groove is positioned on the windward surface and extend inthe axial direction of the rod body, and the photoelectric sensors are arranged at two ends or one end of the rod body. The groove includes an opening and a bottom. The photoelectric sensors form anoptical path in the groove which is spaced from the bottom of the groove for monitoring ice crystals on the bottom of the groove. A controller is connected with the photoelectric sensors and judges whether an ice crystal icing condition exists or not according to the change of the electric signal fed back by the photoelectric sensors. The rod body also comprises a plurality of airflow channels, the inlet of the airflow channels is positioned at the bottom of the groove of the ice crystal collecting probe, and the outlet of the airflow channels is positioned on the leeward surface of the ice crystal collecting probe. The ice crystal detector is simple in structure, high in reliability, easy to achieve and low in electric power consumption, and can be used for detecting whether ice crystal icing conditions exist in the air.

The invention relates to an optimization design method of a liquid state effluent measure apparatus sampling system, which comprises the optimization of a detector system used by matching with a sampling chamber in the sampling system; optimization of the thickness of a shielding layer at the peripheral part of the sampling chamber; and optimization of volume and dimension of the sampling chamber. The method comprises the following steps: for a simulated source item containing nuclide to be measured, preferably selecting a detector with 1-5 inches and performing preliminary simulation by different sizes, analyzing detection and electronic performance of the detector, and analyzing the relation of sampling chamber volume and the detection system counting rate; by aiming at the selected area to take regard of extraneous interference factor, performing background radiation shield simulation to determine an appropriate shielding layer thickness; measuring the counting rate relation of economic cost and detection system; and determining the optimized liquid state effluent monitoring sampling system. According to the method, excellent monitoring performance of the monitoring sampling system is obtained, and the system research and open time can be simultaneously and effectively saved, design cost is saved, and the radiation risk is minimized.

The invention relates to a harbor navigation channel sea fog detection method and system for millimeter wave radar devices. The system comprises at least two millimeter wave radar devices and a terminal server, wherein the millimeter wave radar devices are used for carrying out repeated scanning in a pre-determined scope to acquire multiple sets of cone detection data and multiple sets of vertical detection data and sending the multiple sets of cone detection data and the multiple sets of vertical detection data to the terminal server, and the terminal server is used for processing and displaying the data. The system is advantaged in that networking observation of the multiple millimeter wave radar devices is realized through pertinent data processing methods and fusion means, a coverage scope of the sea fog monitoring system based on the millimeter wave radar devices is effectively expanded, and the higher practical application value is realized.

The invention relates to an obstacle detecting apparatus and an obstacle detecting method and an exemplary embodiment of the invention provides an obstacle detecting apparatus, including: a stereo camera which photographs a front of a vehicle to generate a left image and a right image; an image matching unit which applies a block matching algorithm to the left image and the right image to extract a plurality of feature points having a similarity which is equal to or larger than a reference value and calculate a coordinate and a depth of the plurality of extracted feature points; a plane calculating unit which connects every three feature points of the plurality of feature points to calculate a plurality of triangles, based on the coordinate and the depth of the plurality of feature points; a normal calculating unit which calculates directions of normal of the plurality of triangles, based on the coordinate and the depth of three feature points corresponding to vertexes of the plurality of triangles; and an obstacle detecting unit which detects an obstacle in front of the vehicle based on a result of comparing a photographing direction of the stereo camera with the normal directions of the plurality of triangles.

The invention belongs to the technical field of fire detection, in particular to an optical self-detection linear beam type smoke-sensitive fire detector and an on-site self-detection method; the detector comprises a single-chip microcomputer, a signal receiving circuit and a signal answer circuit, and also comprises a linear beam type electrically-controlled dimming simulated smoke-sensitive optical self-detection circuit. Fire detection sensitivity detection and fault diagnosis can be provided for the detector in real time on site; an alarm signal is given out in self-detection if the performance indexes of the detector, such as fire detection function or sensitivity, are abnormal; therefore, the detector is far more advantageous than traditional linear beam type smoke-sensitive fire detectors in terms of main performances and technical indexes, such as convenient and effective daily maintenance and on-site detection, lower fault rate and false alarm rate, avoidance of fire alarm missing, and insurance of fire detection sensitivity; the detector serves as an advanced, reliable, practical and emergency novel fire detection and alarming product for firefighting security of large-space building sites in China.

The invention relates to the technical field of automotive radars, in particular to a vehicle-mounted radar calibration device and a calibration method thereof. The calibration device comprises a radar mounted on a to-be-calibrated vehicle and a calibration assembly disposed behind a vehicle-mounted radar. The calibration assembly includes a horn antenna and a copper-shaft cable; the horn antennais arranged right behind the vehicle-mounted radar; the copper-shaft cable connected with the horn antenna is used for transmitting a millimeter wave and reflecting the millimeter wave to the vehicle-mounted radar; and the vehicle-mounted radar sends calibration assembling information obtained by detection to calibration software for correction. According to the invention, since the copper shaft cable is used for transmitting the millimeter wave and can be wound, the occupied field is smaller than that in the target simulator scheme and the corner reflector scheme. After the horn antenna is connected with the copper shaft cable, the calibration device is arranged at a position being close to the radar, so that most of signal interferences can be avoided and the calibration accuracy is improved.

The laser radar comprises a light source structure, a coaxial transceiving structure comprising a view field adjusting unit and a detection structure which are sequentially arranged along a light path, the center position of the detection structure deviates from the coaxial position corresponding to the light source structure, and the deviation direction and distance of the detection structure are set according to the rotation angular velocity of the view field adjusting unit and the detection distance of the laser radar. According to the technical scheme, the focus point of the echo light formed when the view field adjusting unit rotates corresponds to the center position of the detection structure as much as possible, the coupling efficiency of the detection structure is improved, and then the limitation of the scanning speed and the detection distance is broken through.

The invention discloses a detecting module and an imaging system. The detecting module comprises a scintillator array, a first set of light guiders and a second set of light guiders, wherein the scintillator array is used for receiving radiant rays and producing corresponding light signals and comprises multiple scintillators, the multiple scintillators include multiple rows of scintillators extending in the first direction and multiple columns of scintillators extending in the second direction, the first set of light guiders extend in the first direction and are distributed on the top face ofthe scintillator array, and the second set of light guiders extend in the second direction and are distributed on the bottom face of the scintillator array. The light guider number of the first set of light guiders is not greater than the row number of the multiple rows of scintillators, and the light guider number of the second set of light guiders is not greater than the column number of the multiple columns of scintillators. The light guider number can be decreased on the premise that the detection performance is ensured, and accordingly the cost is reduced.

The invention relates to the technical field of nondestructive detection, in particular to a nondestructive detection system. The nondestructive detection system consists of a conveying device, a swinging device, a rotation plate and an auxiliary part. An outer wall body is arranged at the outer side of the detection system, and is groove-shaped; a square inner wall body is arranged in the middle of the outer wall body; an entrance channel and a discharge channel are arranged between the inner wall body and the outer wall body; an entrance movable lead door is arranged on the inner wall body of the entrance channel; an exit movable lead door is arranged on the inner wall body of the discharge channel; a detection chamber entrance is further arranged on the front face of the inner wall; a detection chamber lead door is mounted at the detection chamber entrance; the conveying device is arranged between the entrance channel and the discharge channel; the conveying device is groove-shaped after passing through the entrance movable lead door and the exit movable lead door; the swinging device and the rotation plate are arranged at the upper middle part of the inner wall body; a pit is arranged below the rotation plate; a pit cover plate is arranged above the pit; and an illumination lamp is further arranged at the upper part of the inner wall body.

The invention discloses a wearable flexible sensor and a preparation method thereof, which belong to the technical field of wearable electronic devices. The wearable flexible sensor comprises a flexible substrate, an electrode, a piezoresistive layer and a PDMS packaging layer which are sequentially arranged from bottom to top, the piezoresistive layer is composed of a flexible bottom plate and a PEDOT polymer formed by gas phase polymerization on the surface of the flexible bottom plate, and the surface of the piezoresistive layer is provided with a microstructure conforming to Gaussian distribution; The wearable flexible sensor provided by the invention has good flexibility and ductility, various structural forms, good comfort and air permeability, and has linearity, high sensitivity and excellent detection performance in a large range.

The present invention relates to an antenna cover used for a reflector antenna and a manufacturing method thereof. The antenna cover comprises a truncated cone shaped cover body, and the diameter of a lower bottom surface of the truncated cone shaped cover body is d, wherein d is the actinal surface diameter of a reflector of the reflector antenna. The height of the truncated cone shaped cover body is 1.05*h+(6c / f), wherein h is the antenna physical mechanism height of the reflector antenna, f is the working frequency of the reflector antenna, and c is the vacuum light speed. The diameter of an upper bottom surface of the truncated cone shaped cover body is d-2*a*tan(w / 2), wherein a is the reflector focal length of the reflector antenna, and w is a reflector field angle of the reflector antenna. The antenna cover provided by the present invention can cover the antenna, at the same time, enables the weight, size and wind resistance of the cover body to be reduced and the total weight and size of a radar to be reduced overall, and is convenient to transport and erect.

The invention provides a single-chip multi-colored photoelectric detector, which comprises a substrate, wherein a first absorption layer structure, a second absorption layer structure to an ith absorption layer structure to an Nth absorption layer structure are sequentially formed on the substrate from bottom to top, N is a positive integer larger than 1, and i is a positive integer larger than 1and smaller than or equal to N; each absorption layer structure is provided with a lower contact layer, an absorption layer and an upper contact layer, and the contact layers of the two adjacent absorption layer structures are shared; and the absorption wavelengths of the N absorption layers are gradually increased along a light incidence direction. Through the adoption of the structural design ofa multi-colored detector, multi-colored synchronous detection or selective bandpass detection in the short-wave infrared or visible short-wave spectrum range can be realized.

The invention relates to cloud storage technology, and provides a method and an apparatus for detecting a return path. The method comprises the steps that a first level server sends a first HTTP detection packet and a first PING detection packet to a second level server within a preset time period; the first level server receives a second HTTP detection packet and a second PING detection packet fed back by the second level server after receiving the first HTTP detection packet and the first PING detection packet; and the first level server determines a current network state according to the second HTTP detection packet and the second PING detection packet. The same detection effect is guaranteed on the basis of reducing the number of the detection packets, so that the bandwidth is saved.

The invention relates to the technical field of navigation, in particular to a target point positioning navigation system and method. The target point positioning navigation system comprises a probingdevice, a positioning device and a navigation control device, wherein the navigation control device comprises a first marker and a processing device; the positioning device comprises a detection device and a second marker arranged on the detection device, wherein the detection device is in contact with a basic object and used for determining the relative positional relationship between a target point in the basic object and the second marker; the processing device determines the relative positional relationship between the target point in the basic object and the first marker according to therelative positional relationship between the first marker and the second marker; the probing device comprises a probe rod assembly and a third marker arranged on the probe rod assembly, and the processing device determines the relative positional relationship between the target point and the third marker through the relative positional relationship between the first marker and the third marker soas to control the probe rod assembly to reach the target point. Pollution to a puncture body and nearby areas is reduced, and the problem is avoided that the markers on the detection device and the probe rod assembly are mutually blocked.

The invention relates to a short-distance target radar detection method based on stepped frequency signals. Antennas adopt a bistatic mode, one antenna is used for transmitting detection signals, another antenna is used for receiving target scattering echo signals, the detection signals transmitted every time are single-frequency continuous waves, the detection signals are transmitted in a stepped frequency mode, the times of transmitting the detection signals are the frequency number of the detection signals N=B / delta f, wherein B refers to frequency bandwidth, and delta f refers to the step length of the frequency. Corresponding to the detection signals with N frequencies, the received target scattering echo signals are si, i=0, 1,..., N-1, the target scattering echo signals are subjected to inverse Fourier transform, and one-dimensional imaging of a detection target is realized according to the propagation speed of electromagnetic waves.

The invention discloses a through-the-wall radar detection system and detection method based on an unmanned aerial vehicle. The system comprises the unmanned aerial vehicle, an environment sensing unit, a through-the-wall radar, a holder and a control unit; The unmanned aerial vehicle, the environment sensing unit, the through-the-wall radar and the holder are all connected with the control unit; the through-the-wall radar is located on the unmanned aerial vehicle and is used for detecting an external structure, an internal structure and internal personnel of the to-be-detected building; the environment sensing unit is located on the unmanned aerial vehicle and used for sensing flight environment information of the unmanned aerial vehicle and sending the flight environment information to the control unit. The control unit controls the flight of the unmanned aerial vehicle according to the flight environment information, so that the distance between the unmanned aerial vehicle and the outer wall body is kept within a certain range; the holder is located on the unmanned aerial vehicle, the transceiving antenna of the through-the-wall radar is located on the holder, and the control unit controls the movement of the holder according to the flight environment information so as to enable the array plane of the transceiving antenna to be parallel to the outer wall body. The system has the advantages of simple structure, good detection performance and the like.

The invention discloses a control method for vehicle body height compensation of a semi-active suspension, a vehicle is provided with an electronic stability program controller and a semi-active suspension controller, and wheel speed sensors and air springs are arranged at tires of the vehicle; the adjusting method comprises the steps that S1, a vehicle travels for the first time; S2, the electronic stability program controller judges whether the vehicle is provided with a spare tire; S3, the electronic stability program controller sends a second tire position signal to the semi-active suspension controller; S4, the semi-active suspension controller calculates a first target height according to the rolling radius difference value of the radius of the tire and the radius of the spare tire in the design state; the semi-active suspension controller adjusts the air spring to reach a first target height; and S5, the semi-active suspension controller adjusts the air spring to reach the preset height. The defect that the vehicle body height is reduced due to the small rolling radius of the spare tire is overcome, and the driving safety and comfort are improved.