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

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 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 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 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 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 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 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.