18results about How to "Accurate ranging" patented technology

The invention provides a long-distance safe evacuation protection system and method for railway operation. The long-distance safe evacuation protection method comprises the steps that a train sensing and monitoring device conducts continuous distance measurement through a millimeter wave radar and sends a distance measurement result to an alarm station in a wireless communication mode; a zigbee wireless communication network is established among the alarm station, the remote control device and the machine tool control device, the alarm station is used for analyzing the passing state and speed of the railway vehicle according to the distance measurement result so as to obtain coming vehicle information, and a shutdown instruction is automatically sent to the machine tool control device through the zigbee wireless communication network; or the coming vehicle information is sent to the remote control device through the zigbee wireless communication network, and the remote control device outputs a shutdown instruction to the machine tool control device in a remote control mode; and the machine control device is used for controlling the machine in railway field operation to stop according to the stop instruction. The machine tool is remotely controlled to stop by automatically monitoring the passing state of the railway vehicle, and the effect of safely, accurately and rapidly evacuating people during railway operation is achieved.

The utility model discloses a bridge pile foundation scouring safety monitoring device in the technical field of bridge monitoring. The bridge pile foundation scouring safety monitoring device comprises a clamping table, a lifting box, a positioning block, a waterproof camera, a monitoring sensor and an infrared distance meter. A pile foundation can be locked and hooped through the more stable clamping table and the clamping hoop cylinder, clamping is more stable, the lifting table is limited through the guide rod and the ball screw, it is ensured that lifting of the lifting table is stable and does not deflect, the more accurate lifting direction is provided for a detected arc plate and the lifting table, it is ensured that detection lifting is kept vertical, and the detection efficiency is improved. In this way, the infrared distance meter is kept vertical, the annular arc plate does not rotate or deflect, and the effectiveness of detection data is improved. The horizontal extension and retraction of the arc plate are more stable, the detection data are more accurate, and the scouring condition is monitored in real time through the waterproof camera and the infrared distance meter, so that the monitoring accuracy is ensured when the bridge pile foundation is flushed by river water, the operation is simple, and the use is convenient.

A distance measuring device for a gap between lining plates of a rolling line rack comprises a bottom plate, a lifting part, a correcting part and a distance measuring part. The bottom plate is placed in the center of the top end face of the roller bearing box outer shell. The correcting part is arranged at the bottom end of the bottom plate; the lifting part is arranged on the upper end face of the bottom plate, and the distance measuring part is arranged on the lifting part; the lifting part comprises a guide piece and a hydraulic cylinder; the hydraulic cylinder shell is arranged in the middle of the upper end face of the bottom plate. The two guiding pieces are symmetrically arranged on the two sides of the upper end face of the bottom plate. The guide piece comprises a stand column and a guide column; the stand column is vertically arranged on the upper end face of the bottom plate, a guide hole is formed in the top end of the stand column, and the guide column is inserted into the guide hole in the top end of the stand column. According to the utility model, the labor intensity of workers is reduced, and the measurement precision and efficiency of the lining plate gap are improved.

Provided is a distance measuring device capable of accurately measuring a distance even in an environment in which multiple paths exist. The distance measuring apparatus acquires a plurality of first phases when a plurality of first signals transmitted to the other device at three or more frequencies are received by the other device, and measures a plurality of second phases when a second signal is received from the other device at three or more frequencies. Extracting N signal pairs corresponding to N (N is greater than or equal to 2) signal strengths except one or more signal strengths smaller than a threshold value in the signal strengths of the signal pairs of the first signals and the second signals from the plurality of signal pairs, a round-trip phase obtained by summing up the first phase and the second phase of the first signal and the second signal included in each signal pair is obtained for the N signal pairs, and the distance to the other device is measured on the basis of the N round-trip phases and the plurality of frequencies.

The invention provides a step frequency radar system, a system time delay determination method and a radar ranging method. The step frequency radar system is provided with at least two PLL circuits used for generating local oscillation signals, and local oscillation frequencies configured for the PLL circuits form an arithmetic progression of which the tolerance is the step length of the local oscillation frequencies. In the process of transmitting the radar signal, the control module can gate one of the PLL circuits according to the current local oscillation frequency and configure the local oscillation frequencies of the other PLL circuits in advance, so that the local oscillation frequencies of the other PLL circuits can be adjusted in advance. And under the condition that the current local frequency needs frequency hopping, the control module can realize frequency switching by gating the other PLL circuit. Therefore, through alternate output of a plurality of PLL circuits, rapid switching of frequency points can be realized, system errors can be accurately measured, and the advantages of high frequency stability, good phase noise, less stray, low cost and the like can be taken into account.

The invention discloses an intelligent mold opening positioning control system and method based on UWB, which specifically relates to the technical field of positioning control and is used to solve the problem of low positioning control accuracy. The invention sets an ultra-wideband transmitting end and a receiving end, uses different channel models for communication transmission, performs ranging and positioning between the transmitting end and the receiving end according to a clock offset method and a time difference arrival positioning method, combines multipath component analysis with filtering technology to determine indoor mold opening positioning conditions, combines the ultra-wideband with an inertial measurement unit to optimize indoor mold opening positioning accuracy, analyzes characteristic matching information generated in the indoor mold opening positioning process and generates different signals, and performs different mold opening positioning control management on different models.

The invention relates to the technical field of laser measurement, in particular to a multi-light-path laser ranging method, device and system, and the method comprises the steps: transmitting modulated signal light containing high-frequency modulation signals with at least three different frequencies to a target to be subjected to ranging, and determining the phase difference of echoes of the target, a high-frequency band and a low-frequency band of the modulation signal are divided according to a preset standard; simulating an equivalent modulation signal based on the high-frequency modulation signals of three different frequencies carried by the modulated signal light, the equivalent frequency of the equivalent modulation signal being a difference value between the sum of the frequencies of the first modulation signal and the second modulation signal and twice the frequency of the third modulation signal, the equivalent phase difference is two times of the sum of the phase differences of the first modulation signal and the second modulation signal and the phase difference of the third modulation signal; and determining the distance to the to-be-measured target based on the equivalent frequency of the equivalent modulation signal and the corresponding equivalent phase difference. According to the invention, the distance of a long-distance moving object can be accurately measured.

The invention relates to the technical field of engineering surveying and mapping, and discloses a constructional engineering cost on-site surveying and mapping device based on an intelligent sensor, comprising a connecting block, a mounting rack mounted on the connecting block, a laser displacement sensor mounted on the mounting rack, and a support rotatably connected to the circumferential surface of the connecting block. Movement of the supports can drive the supporting legs to move synchronously, angle adjustment of the multiple supports can be controlled synchronously, angle adjustment of the supports can be achieved, it is ensured that surveying and mapping personnel can adjust the opening angles of the multiple supports to be the same angle, the situation that in the follow-up surveying and mapping process, the whole device topples over can be avoided, and the surveying and mapping efficiency is improved. The surveying and mapping accuracy can be improved, the laser displacement sensor is protected from being damaged by the field environment, the service life of equipment is prolonged, the consistency of surveying and mapping data is guaranteed, the reliability of the cost result is improved, and the surveying and mapping accuracy and stability of the device can be guaranteed.

The utility model discloses a portable folding frame for a laser range finder, which relates to the technical field of laser range finders and comprises a mounting plate, a supporting unit and an adjusting unit. Supporting units are mounted at the lower ends of the mounting plates; each supporting unit comprises rectangular grooves, a movable shaft, a first supporting frame, a threaded movable shaft, a threaded fixed ring, a movable sleeve, a threaded column and a threaded cylinder, the three rectangular grooves are evenly formed in the outer side of the mounting plate at equal intervals, the movable shafts are fixedly connected to the inner sides of the rectangular grooves, one end of the first supporting frame is rotationally connected with the movable shafts, and the other end of the first supporting frame is rotationally connected with the threaded fixed ring. According to the portable folding frame for the laser range finder, when the portable folding frame for the laser range finder is used, the range finder needs to be leveled conveniently, meanwhile, a supporting device of the range finder is convenient to fold and carry, and the portable folding frame for the laser range finder is convenient to use. The device does not need to be moved many times when the surroundings need to be measured.

The invention discloses a monocular distance measurement method, device and equipment and a computer readable storage medium, and the method comprises the steps: carrying out the detection of a target object in a target image collected by image collection equipment through a deep learning algorithm, and determining a distance relation and an orientation relation between the target object and the image collection equipment according to a detection result, and constructing an observation equation of the target object relative to the image acquisition equipment according to the distance relationship and the orientation relationship, determining a target value of a state variable of the target object based on the observation equation and a pre-constructed extended Kalman filtering distance measurement model, and determining the distance between the target object and the image acquisition equipment according to the target value of the state variable. According to the embodiment, the problem that existing monocular distance measurement is not accurate enough can be solved.

The application discloses a dynamic target tracking and ranging method and system based on fusion matching, relates to the technical field of target tracking and identification, and specifically comprises the following steps: collecting video image data of a to-be-measured target and preprocessing; constructing a self-attention enhanced YOLOv8 target detection model to detect the to-be-measured target; predicting a next frame target estimation box of the video image data by using Kalman filtering, updating the target detection box, and positioning the to-be-measured target position; matching the predicted target estimation box with the current target detection box by using the Hungarian algorithm to establish the motion trajectory of the to-be-measured target; converting the coordinates of the to-be-measured target into coordinates in a robot world coordinate system according to the coordinates of the to-be-measured target in a tracking box sequence and based on the internal and external parameters of a camera; and calculating the distance of the to-be-measured target according to the coordinates in the robot world coordinate system. The application realizes accurate target positioning and ranging by converting the target from a pixel coordinate system to a world coordinate system, and solves the problem of inaccurate target distance calculation in a real-time dynamic environment.

The utility model discloses a laser radar integrated preparation device, which comprises an optical platform, a first slide way, a first reflecting plate and a clamping device, the first reflecting plate is provided with a plurality of reflecting surfaces with different reflectivity; the clamping device is arranged on the optical platform, the first reflecting plate is arranged on the first slide way, and the first slide way is in butt joint with one side of the optical platform; the clamping device is used for clamping an emitter and a detector of the laser radar and supporting adjustment of relative positions of the emitter and the detector; the first reflecting plate can be close to or away from the optical platform along the first slideway; and the first reflecting plate can switch different reflecting surfaces and receive the laser emitted by the emitter at any position of the first slideway. Based on the preparation device, integrated preparation of the opposite excitation radar in the same device is effectively realized.

The application discloses a kind of cargo crane positioning detection equipment and control method based on laser scanning, the cargo crane positioning detection equipment and control system of the present application have the characteristics such as simple operation, clear display, save manpower and time cost, real-time monitoring etc..Solve the problem that hoist in each industrial environment is due to system is huge and complex needs time and energy and the precision is poor.Laser scanning device and sensor system complement each other, make system ranging accurate, error is smaller, error can be less than 5%, have certain use value and popularization value, have certain use value and popularization value.

The utility model provides a kind of automatic pilot car of tidal flat fishery, including the bottom plate being located at the top of track assembly, and sensor assembly is fixed in the top of bottom plate by mounting seat, the mounting seat is screwed in the top of bottom plate, universal joint is screwed in the top of mounting seat, sensor assembly is located in the top of universal joint, the utility model is cooperated by universal joint and servo motor, so that sensor assembly keeps stable in bumpy environment, realizes accurate monitoring and obstacle avoidance, reaches the effect of improving tidal flat fishery operation efficiency and reducing artificial labor intensity.

The invention provides a coal mine power management system and method based on power line carrier communication, the system comprises a monitoring terminal and a plurality of power box devices, the monitoring terminal comprises a first power line carrier communication module, and communicates with each power box device based on power line carrier communication; the distance measuring module sends a distance measuring signal to each power box device and calculates the distance to each power box device based on the response signal; the addressing module allocates a unique address to each power box device according to the calculated distance information of each power box device; the management module monitors and manages the power box equipment based on the unique address; the power box equipment comprises a second power line carrier communication module which communicates with the first power line carrier communication module; the response unit receives and returns a response signal; the address storage unit stores address information, accurate ranging and automatic addressing of the power box equipment are achieved, the problems that traditional manual addressing is low in efficiency and prone to errors are solved, and the power management system has practicability.

The utility model relates to the technical field of stacker-reclaimer main bodies of cement plants, in particular to a cement plant stacker-reclaimer anti-collision system based on millimeter wave radar, which comprises a stacker and a reclaimer main body, material rakes are mounted on the front side and the rear side of the reclaimer main body, and a large arm is rotatably connected to the top of the stacker. The driving motor drives the driving wheel to rotate, the stacker and the large arm are moved back and forth through the driving wheel, the position of the large arm is adjusted, after the large arm is adjusted to a proper position, the brake is pressed to lock the driving wheel, the device is prevented from moving again, and then materials are conveyed to the surface of the large arm through the stacker. Materials are conveyed to the high position through the large arm, in the working process of the device, the distance between the large arm and an obstacle and the moving speed of the large arm are detected through the millimeter wave radar body, and when the obstacle is detected, the buzzer, the LED warning lamp and the brake relay are started through the control unit to conduct early warning.

The invention discloses a pedestrian positioning method and device. The pedestrian positioning method comprises the following steps: acquiring pedestrian historical trajectory data and environment data; predicting the next position of the pedestrian according to the historical trajectory data of the pedestrian and the environmental data; according to the predicted next position of the pedestrian, based on a pre-trained reinforcement learning model, selecting a beacon near the next position; and positioning the pedestrian according to the selected beacon near the next position.

The utility model provides a large-area code spraying detection device with a material angle adjusting function, which comprises a conveying belt assembly, a distance measuring device, a material steering device, a code spraying device, a detection device and an unqualified material discharging device, the multiple guiding devices are arranged on the upstream of the distance measuring device and the upstream of the code spraying device respectively, the moving track of the products guided by the guiding devices can be parallel to the axis of the conveying belt, and the material steering device is arranged on the moving track of the products and used for rotating the products. By the adoption of the conveying belt assembly, it can be guaranteed that a product moves along a preset moving path, and therefore it is guaranteed that the distance measuring device can measure the distance accurately; one corner of the product is blocked by the material steering device, so that the product can be steered, and the product can be sprayed with codes in a uniform direction by steering the product in time; materials with similar lengths and widths can be effectively arranged in a unified direction, and code spraying and detection are achieved.