21results about How to "Guaranteed Detection Performance" patented technology

An FMCW lidar system, the FMCW lidar system comprising: a laser light source configured to emit a swept laser light; the light engine comprises a light emitting / receiving device, the light engine is configured to receive the sweep frequency laser and emit at least one part of the sweep frequency laser as a detection light beam from the light emitting / receiving device, the detection light beam is incident to an obstacle and then generates a reflection light beam, and the light emitting / receiving device is further configured to receive the reflection light beam; the scanning assembly is arranged on one side of the light transmitter / receiver and is configured to deflect the detection light beam to realize detection light beam scanning; and the birefringence component is configured to compensate a transmitting and receiving deviation angle caused by the movement of the scanning component, so that the detection light beam and the reflection light beam are transmitted and received by the same port of the light transmitter / receiver.

The application provides a sensing signal transmission power adjustment method, a base station and a user terminal device. The sensing signal transmission power adjustment method comprises the following steps: the base station acquires a first distance between the base station and the user terminal device and a communication path loss estimation value; the base station receives a reference signal receiving power reported by the user terminal device, and determines a communication path loss actual value between the base station and the user terminal device according to the reference signal receiving power and a communication signal transmission power of the base station; the base station acquires a path loss deviation of the communication path loss estimation value and the communication path loss actual value; the base station determines a sensing path loss estimation value between the base station and a sensing target according to the first distance and sensing information reported by the user terminal device, wherein the sensing information is determined by the user terminal device sensing the sensing target; the base station determines a sensing path loss actual value between the base station and the sensing target according to the sensing path loss estimation value and the path loss deviation; and the base station adjusts a sensing signal transmission power according to the sensing path loss actual value.

The present application relates to the technical field of laser radar, and in particular to a laser radar APD protection method, device, storage medium and laser radar system, wherein a laser radar APD protection method is applied to the main control unit of a laser radar system including a main control unit, a laser and an APD, and the method comprises the following steps: emitting a pulse signal at a certain repetition rate to trigger the laser to emit a light pulse; generating a control signal to cut off the low-voltage power supply circuit of the APD, so that the APD is in an off state in a blind area, and the blind area is a distance range predefined according to measurement requirements. The present application controls the working state of the APD by setting a control signal, so that the APD does not work in the blind area, thereby reducing the occurrence of the APD being burned due to the small distance between the measurement point and the target object and the strong return light signal received by the APD. The probability of the APD being burned is reduced without increasing the cost and ensuring the detection performance of the APD.

The utility model belongs to the technical field of blast furnace stock rods, and relates to a blast furnace stock rod with a safety protection structure, which comprises a base, supports are fixed on two sides of the upper end of the base, a winding drum is mounted between the supports, a steel wire rope is wound on the winding drum, a motor is fixed on one side wall of each support, and the motor is used for driving the winding drum to rotate. A stock rod block is fixed to one end of the steel wire rope, four sets of connecting cavities are circumferentially distributed in the outer wall of the stock rod block, damping rods are installed in the connecting cavities, connecting columns are arranged at one ends of the damping rods, springs are installed on the outer side walls of the damping rods, buffer blocks are fixedly connected to the other ends of the damping rods, and balls are installed at the outer ends of the buffer blocks. In the lifting process of the stock rod block, the damping rod and the spring are combined to buffer and protect the impact formed between the stock rod block and the inner wall of the blast furnace; meanwhile, sliding friction is changed into rolling friction through the balls, the friction force between the buffer blocks and the inner wall of the blast furnace is reduced, the lifting performance is guaranteed, the stock rod block and the inner wall of the blast furnace can be protected at the same time, and the detection performance is guaranteed.

The present invention relates to a method for predicting surrounding rock of tunnels using multi-line geological radar, which comprises the following steps: S1. Detection preparation; S2. Measured line design, a first measured line is set along the contour of the tunnel wall, and a plurality of second measured lines are set in a crisscross pattern on the tunnel face to obtain a measured line design drawing; S3. Detection equipment installation and calibration; S4. Full-area scanning, the measured line design drawing in step S2 is implanted into the control computer of the three-arm rock drilling trolley, and the control computer of the three-arm rock drilling trolley automatically controls the support arm to drive the geological radar to move along the route of the measured line design drawing and perform scanning and detection; when the geological radar is installed on the support arm in step S3, the geological radar is installed on the upper end face of the support arm through a clamping device, and the clamping device can achieve the effect of the geological radar being in close contact with the tunnel wall during movement. The present invention can perform full-area scanning on the tunnel face, with higher detection accuracy, and can also ensure that the geological radar is in close contact with the surface to be measured during detection, and the detection effect is better.

The invention provides a metal mine underground goaf detection device and method, and relates to the technical field of goaf detection. Comprising a mounting frame, detection equipment is mounted on the mounting frame, a detection head is detachably arranged at the output end of the detection equipment, a walking mechanism for walking is arranged on the mounting frame, an adjusting frame body is slidably arranged in the mounting frame, and a first driving assembly for driving the adjusting frame body to reciprocate is arranged on the mounting frame; a mounting frame is arranged on the adjusting frame body in a sliding mode, a main support is arranged on the mounting frame, two detection cylinders are arranged on the main support in pairs, drill rods are arranged in the detection cylinders in a penetrating mode, drill bits are arranged at the free ends of the drill rods, second driving assemblies for driving the drill rods to move in the axial direction of the drill rods are arranged in the detection cylinders, and the detection heads are arranged in the drill rods. An adjusting mechanism for adjusting the deflection angle of the detection head is arranged in the drill rod; the drill rod can smoothly penetrate through the earth surface with severe geological conditions, the detection angle of the detection end of the detection head can be changed, and the detection range of the structure is widened.

The present invention provides a relayless transmission system and method for a fiber optic hydrophone array, wherein the relayless transmission system comprises an optical transmitter, an optical amplifier component, a fiber optic hydrophone array, a remote gain unit, and an optical receiver connected in sequence by transmission optical fibers, wherein the optical amplifier component amplifies the signal light emitted by the optical transmitter and transmits it to the fiber optic hydrophone array, and the signal light output by the fiber optic hydrophone array is amplified by the remote gain unit and transmitted to the optical amplifier component, and then amplified by the optical amplifier component and transmitted to the optical receiver. The relayless transmission system and method of the present invention comprehensively apply doped medium optical amplification technology, fiber distributed Raman amplification technology, and remote optical pumping amplification technology, effectively ensuring the detection capability of the fiber optic hydrophone array for weak signals, and greatly extending the relayless transmission distance of the densely multiplexed fiber optic hydrophone array in the shore-based fixed fiber optic sonar system.

This invention relates to a beamforming method for an integrated communication and sensing system assisted by an intelligent reflective surface, belonging to the field of wireless communication technology. The method first synthesizes multiple beams for multiple communication users and radar targets using spatial degrees of freedom, based on the transmit beamforming design requirements. Then, by jointly optimizing the transmit beamforming of the base station and the phase shift matrix of the RIS (Radio Response System), the beamforming design method is expressed as a constrained optimization problem for solution. Under the constraints of signal leakage-to-noise ratio and RIS phase shift, the performance of MIMO radar transmit beamforming is maximized. Finally, the solution is obtained through an alternating iterative optimization method. The joint beamforming method of this invention is simple to implement, has a wide range of applications, and can improve the spectral efficiency of integrated communication and sensing systems.

The invention belongs to the technical field of infrared thermal imaging, and particularly relates to a refrigeration type medium-wave infrared thermal imaging system, which analyzes the real-time working load of an infrared detector through a detection load sensing unit, outputs a load analysis result, and calculates the real-time working load of the infrared detector through a refrigeration parameter calculation unit based on the load analysis result. The optimal refrigeration temperature and refrigeration power are calculated, refrigeration parameters are output, finally, refrigeration work is started based on the refrigeration parameters through an accurate refrigeration unit of the Stirling refrigerator, meanwhile, the actual temperature of the detector is monitored in real time, and temperature data are output; on the basis, the real-time working load and the environment temperature of the detector are dynamically matched through the refrigeration temperature control module, precise refrigeration according to needs is achieved, the problem of high power consumption caused by the fixed refrigeration temperature is avoided, and it can be ensured that the detector is in the optimal low-temperature environment under different loads so that the detection performance can be guaranteed.

The utility model discloses a lens cone assembly, a laser emission module and a single-point laser radar, a plurality of diaphragms are arranged in a conical emission channel at intervals, and effective light spots can be avoided through inner holes of the diaphragms, so that the effective light spots can be emitted out of a lens cone smoothly, and the efficiency is improved. As the inner diameter of the former diaphragm of the two adjacent diaphragms in the light emitting direction is smaller than that of the latter diaphragm, stray light can be blocked layer by layer through the multiple diaphragms, the stray light is prevented from being emitted out of the lens cone, and the detection effect of the laser radar is guaranteed.

The invention discloses a radar detection method, device and equipment in a multi-target environment and a medium, and the method comprises the steps: obtaining a target echo signal, and carrying out the FFT processing of the target echo signal; respectively selecting M / 2 echo units on the left and right sides of the target echo unit as reference echo units; according to the signal amplitude mean square error estimation of the plurality of reference echo units which are not rejected, sorting the plurality of reference echo units which are not rejected to obtain a first sequence; determining a second-order difference value of each reference echo unit in the first sequence, and taking the reference echo unit corresponding to the minimum second-order difference value as a reference echo unit; and in the first sequence, according to the signal power of the reference echo unit, the signal power of the echo unit before the reference echo unit and a preset scaling ratio, determining whether the target echo unit contains a detection target. The invention belongs to the field of radar detection. According to the invention, the detection probability of the radar in a multi-target environment can be improved.

The invention provides a low-orbit radar satellite constellation cooperative frequency hopping anti-interference method and system, and the method comprises the steps that a ground control center generates a global frequency hopping time-frequency distribution table based on the future orbit forecast data of a constellation; the satellite monitors an interference signal in real time, and initiates local negotiation with a master control satellite through an inter-satellite link when an unforeseen interference source or task change is detected; based on the negotiation result, selecting a frequency band in the reserved frequency resource table and sending the frequency band to the interfered satellite; a satellite receives interference type signals, positions the interference type signals and analyzes the characteristics of the interference signals, historical interference data are collected, part of frequency resources are reserved to serve as anti-interference special frequency bands, constellation overall anti-interference performance indexes are evaluated regularly, and pre-planning parameters of the next round are optimized. Through combination of centralized pre-planning and on-satellite dynamic adjustment, the problems of poor dynamic adaptability, low cooperation efficiency and the like in the prior art are solved, and the anti-interference capability and the spectrum resource utilization rate of a low-orbit radar satellite constellation in a complex electromagnetic environment are improved.

The utility model relates to a navigation radar integrating two systems of continuous wave and pulse pressure, which comprises a receiving antenna, a transmitting antenna, a digital-to-analog converter and an analog-to-digital converter, the digital-to-analog converter is connected with a phase discriminator, the phase discriminator is connected with a PLL loop, the PLL loop is connected with a filter amplifier and the analog-to-digital converter in series, and the filter amplifier is connected with the analog-to-digital converter. The receiving antenna is connected with an amplitude limiter, a signal of the amplitude limiter enters a PLL loop after being subjected to low-noise amplification, the PLL loop is connected with a radio frequency switch, the radio frequency switch is connected with a low-power channel and a high-power channel, and the low-power channel and the high-power channel are both connected with the transmitting antenna; the utility model has the advantage of good detection performance.

The application discloses a frequency range determination method, a computer device and a computer readable storage medium, and belongs to the field of signal processing. The method comprises the following steps: acquiring a signal quality parameter of a medium frequency signal; determining a section with high antenna gain according to the acquired signal quality parameter, so as to determine a target frequency range. The application solves the problem that the sweep frequency bandwidth does not match the antenna bandwidth by adaptively adjusting a sweep frequency control signal, and improves the detection capability of the radar.

The invention discloses an antenna device and a millimeter wave radar, and relates to the technical field of antennae, the antenna device is applied to the millimeter wave radar, the millimeter wave radar comprises a shell, the antenna device comprises a signal module and an adjusting assembly, the signal module is used for being arranged in the shell, and the adjusting assembly is used for adjusting the signal module. The millimeter wave antenna is arranged in the shell and transmits or receives millimeter wave signals towards the outer side of the shell so as to form a radiation field in the shell. And the adjusting assembly is arranged between the shell and the signal module, has a spatial impedance value different from that of air, and is used for guiding propagation of the millimeter wave signals so as to adjust radiation characteristics of the radiation field in all directions. According to the scheme, the design limitation on the shape and the thickness of the shell can be reduced, and the detection performance of the millimeter wave radar can be further optimized.

This invention relates to the field of underwater robot technology, specifically an auxiliary power unit for an underwater robot and the underwater robot itself. The underwater robot comprises a main body, which includes a main cabin and a control unit. The auxiliary power unit includes a power mechanism and a release mechanism. The power mechanism includes a first cabin, a communication unit, a propulsion unit, and a battery pack. The communication unit is communicatively connected to the control unit; the propulsion unit is located outside the first cabin and is communicatively connected to the control unit; the battery pack supplies power to the propulsion unit and the communication unit; the release mechanism includes a fixed unit, a detachable unit, and a release module. The first side of the fixed unit is fixedly connected to the outer wall of the first cabin; the first end of the detachable unit is detachably connected to the second side of the fixed unit, and the second end of the detachable unit is detachably connected to the outer wall of the main cabin; the release module is connected to the control unit and fixedly connected to the fixed unit. This auxiliary power unit can provide the underwater robot with extended endurance.

The present invention discloses a radar detection method, device, equipment and medium in a multi-target environment, including: obtaining a target echo signal, and performing FFT processing on the target echo signal; selecting M / 2 echo units on the left and right of the target echo unit as reference echo units; sorting a number of reference echo units that have not been eliminated according to the signal amplitude mean square error estimation of a number of reference echo units that have not been eliminated to obtain a first sequence; determining the second-order difference value of each reference echo unit in the first sequence, and taking the reference echo unit corresponding to the minimum second-order difference value as the reference echo unit; in the first sequence, determining whether the target echo unit contains a detection target according to the signal power of the reference echo unit, the signal power of the echo unit before the reference echo unit and the preset zoom factor. The present invention belongs to the field of radar detection. The present invention can improve the detection probability of the radar in a multi-target environment.

The application provides a photon detection method, device and laser radar for a full solid-state laser radar, the method comprising: calibrating a SPAD array, determining SPAD units included in a photosensitive pixel corresponding to each light spot or light strip emitted in a laser, and recording the SPAD units as an initial opening region; opening the SPAD units of the initial opening region to detect a target; obtaining histogram data output by the opened SPAD units; adaptively adjusting the position of the SPAD units opened next time according to the histogram data, when the signal-to-noise ratio in the histogram data of the SPAD units opened next time meets a set value, the SPAD units opened next time are required SPAD units; and calculating distance information of the target according to the histogram data output by the required SPAD units. Through region calibration of the SPAD array, the opening position of the SPAD units is adaptively adjusted based on the signal-to-noise ratio for photon reception at each exposure, which ensures the detection effect while effectively reducing the detection power consumption and data volume.

The utility model discloses a municipal drainage pipeline leakage detection device which comprises a machine table, a vertical plate arranged at the top end of the machine table, a sealing seat arranged at the top end of the machine table on one side of the vertical plate, a drainage pipe body installed on the inner side of the sealing seat, a clamping frame arranged on the outer wall of the vertical plate on the outer side of the sealing seat, bases are arranged on the two sides of the top end of the machine table, U-shaped frames are arranged at the top ends of the bases, lifting bases are arranged on the inner sides of the U-shaped frames, a top base is arranged on the inner wall between the lifting bases, a part containing base is arranged at the bottom end of the top base, and a telescopic driving part is installed on the outer wall of one side of the part containing base. According to the utility model, the purpose of automatically and comprehensively detecting cracks of the drainage pipe body is achieved, so that the detection efficiency and precision of the detection device on the drainage pipe body during use are ensured, and the detection effect of the detection device on the drainage pipe body during use is also ensured; and the purpose of detecting whether the drainage pipe body leaks or not in a liquid injection mode is achieved.

The utility model discloses a cleaning robot with a dust fog shielding mechanism, which comprises a main body, a bracket, a detection piece and a dust fog shielding mechanism, the main body comprises a front side cover, a shell baffle plate and two side brushes, the front side cover is arranged above the shell baffle plate, and the two side brushes are arranged on the bracket. The front side cover and the shell baffle are arranged in the advancing direction of the cleaning robot, the two side brushes are arranged at the bottom of the main body in the advancing direction, the support comprises a chassis support and two spray head supports, the two spray head supports are arranged on the chassis support, the chassis support is arranged on the main body, and the two spray head supports are arranged on the chassis support. The detection part is arranged on the front side cover, the dust fog shielding mechanism comprises a cover body, two first spray heads and two second spray heads, the detection part is arranged in the cover body, the two first spray heads are arranged on the two spray head supports, and the two second spray heads are arranged on the two side brushes.

The utility model discloses a kind of detection support of engineering geology detection, belong to detection support technical field, mainly for engineering geology detection.The technical problem to be solved by the utility model is to provide a kind of detection support of engineering geology detection, including the bottom plate of bottom roller, the bracket is equipped on bottom plate, the mounting sleeve with connecting rod in inside is equipped on bracket, first motor is equipped at the one end of connecting rod that extends mounting sleeve, first motor output end is located with connecting rod in same straight line and is fixed with second housing, second motor is equipped in second housing, second motor output end is perpendicular to the straight line of first motor output end and is equipped with swing arm, swing arm is equipped with the mounting plate of geological radar that has been installed, battery box is equipped at the top of mounting sleeve;Second housing is rotated by first motor, second motor drives swing arm to rotate, to adjust the position of geological radar according to different topography, ensure that geological radar is always oriented ground and parallel to horizontal plane, ensure detection effect.