40results about How to "The ranging result is accurate" patented technology

The invention relates to a two-end distance measuring method of transmission line fault under a dynamic condition, comprising the following steps of: acquiring two-end voltage and current signals through two-end phasor measurement units of the transmission line; then acquiring dynamic positive sequence impedance, admittance, wave impedance and propagation coefficients according to line parameter estimation and a dynamic line parameter method; and finally solving a nonlinear equation related to a fault distance according to the fact that positive sequence voltages derived from two ends to a fault point are equal by applying a Newton iteration method so as to obtain a dynamic distance measuring result of the transmission line fault. The two-end distance measuring method can more effectivelysolve the problem of line parameter and fault distance estimation under the dynamic condition and has accurate and reliable fault distance measuring result.

The invention provides a rotation optical scanning distance measuring device and a method and relates to the field of distance measuring. The rotation optical scanning distance measuring device comprises a fixed base, an angle encoder, a rotation platform, a motor rotor, a motor stator, a laser light source, a light sensing device, a power supply transmission and data receiving device and a data processing device. The motor stator drives the rotation plate to rotate through the motor rotor. The laser light source and the light sensing device are fixed on the rotation platform. The light sensing device is used for reflected laser emitted by the laser light source. The power supply transmission and data receiving device is fixedly connected to the fixed base. A power supply receiving and wireless data transmission device is arranged on the rotation platform and is used for receiving data and electric power emitted by the power supply transmission and data receiving device. The power supply receiving and wireless data transmission device is connected with the light sensing device. The angle encoder is fixed on the rotation platform. The data processing module is connected with the angle encoder and the light sensing device. According to the invention, a technical problem that inner devices in a small laser are easily worn is solved.

The invention provides an ultrasonic range-measuring system which comprises a driving circuit, an ultrasonic probe, a return signal detecting circuit and a singlechip microcomputer, wherein the singlechip microcomputer is connected with the driving circuit, the driving circuit is connected with the ultrasonic probe, a detecting signal of the ultrasonic probe is output to the return signal detecting circuit, an output end of the return signal detecting circuit is connected with the singlechip microcomputer, an analogue switch is further connected between a signal output end of the ultrasonic probe and the return signal detecting circuit, when the singlechip microcomputer sends out a starting signal to the driving circuit, the analogue switch disconnects the connection of the return signal detecting circuit from the range-measuring system, when the singlechip microcomputer stops sending the starting signal to the driving circuit, the analogue switch connects the connection of the returnsignal detecting circuit in the range-measuring system, and the return signal detecting circuit is disconnected when an ultrasonic wave is sent due to the analogue switch with a single-pole double-throw function, so that the self-oscillation caused by the fact that a driving signal is input into a follow-up amplifying circuit can be avoided, and a blind zone detecting distance of the ultrasonic probe can be effectively reduced.

The invention discloses a handheld electronic device with a distance measurement function for measuring a distance between the handheld electronic device and a target object. The handheld electronic device with the distance measurement function comprises a main body, and further comprises a positioning system for setting a position system between the main body and the target object; a target object imaging system for obtaining a virtual image of the target object on the main body; and a data processor for converting and obtaining the distance between the handheld electronic device and the target object according to different display positions of the virtual image in the main body. The invention also discloses a distance measurement method of the handheld electronic device. The device and the method, provided by the invention, get rid of interference of manual factors, and have the advantages of accurate distance measurement result, high repeatability, and simple and convenient application and the like.

The invention provides a networking method for stepping variable-frequency radar communication integration. The networking method includes that different radars are differentiated according to difference of communication signals and stepping variable-frequency signals, difference in stepping variable-frequency signals among the different radars is quite small, the stepping variable-frequency signals is a low-frequency single-frequency signal after frequency mixing, and carrier frequency of the communication signals is relatively high, so that communication information and radar information can be demodulated through different filters; distance among the different radars is measured by utilizing a bidirectional communication time method, distance measuring result is transmitted through the communication information, and a radar communication integration network on the basis of radar relative position is set up finally.

The invention discloses a fault location method and a system based on transient travelling waves within a short time window. The method comprises the steps of acquiring the data of travelling waves at the two ends of an electric transmission line before the occurrence of a fault, and subjecting the data to signal power-frequency fitting treatment to obtain an accurately fitted function value; calculating a voltage modulus or a current modulus at a fault point according to the data of traveling waves; according to the accurately fitted function value, conducting the Karen bell transform treatment and the data alignment treatment to obtain accurate and synchronized data values; according to accurate and synchronized data values, conducting the wavelet transform treatment to extract the time difference between modulus maximum values for fault location, and finally obtaining an accurate fault location value. According to the method provided in the invention, the data of traveling waves are subjected to the signal fitting and data alignment treatment, so that the travelling wave-based fault location does not rely on the time information of GPS timing equipment. The limitations of the GPS timing equipment are overcome. Therefore, the method and the system can greatly improve the reliability of transient travelling wave-based fault location, so that fault location results are more accurate.

The present invention provides a laser scanning distance measurement device and method, and relates to the distance measurement field. The device comprises a fixed pedestal, an angle encoder, a rotation platform, a motor, a laser source, a sensitization device, a power supply transmission and data receiving device, a receiving device and a data processing module; the motor drives the rotation of the rotation platform through a driving belt; the laser source and the sensitization device are fixed on the rotation platform; the sensitization device is configured to receive the laser emitted by the laser source; the power supply transmission and data receiving device is fixedly connected on the fixed pedestal; a power supply receiving and wireless data transmission device is connected with the rotation platform; the power supply receiving and data transmission device is configured to receive the data and the electric energy emitted by the power supply transmission and data receiving device; the receiving device and wireless data transmission device is connected with the sensitization device; the angle encoder is fixed on the rotation platform; and the data processing module is connected with the angle encoder and the sensitization device. The technical problem is solved that the internal parts of the small-scale laser radar is easy to wear.

The invention relates to a range finding method and system for a direct current rail transit power supply line short circuit fault. The method comprises the following steps: S1, whether a permanent short-circuit fault occurs on a DC rail transit power supply line is detected; S2, when the permanent short-circuit fault occurs on the DC rail transit power supply line and the pantograph falling of a vehicle does not does not occur, the distance between a sampling point and a short-circuit fault point is obtained through short circuit fault range finding carried out on the sampling point on the direct current rail transit power supply line. The method of the invention can avoid the shortcomings in the prior art which require the vehicle to stop to find the short circuit fault with a lot of manpower and material resources. The method of the invention can quickly find out the short circuit fault point, which is important for the safety of rail transportation and economic operation.

The invention provides a magnetic suspension optical scanning range finding device and method, relating to the field of range finding. The magnetic suspension optical scanning range finding device includes a fixed base, an angle encoder, a rotating system, a laser range finding system, a power supply transmission and data reception device, a power supply reception and wireless data transmission device, and a data processing module, the rotation of the laser range finding system is realized by a magnetic suspension device to prevent machinery wearing, the power supply reception and wireless data transmission device is used to receive data and electrical energy transmitted by the power supply transmission and data reception device, and the power supply reception and wireless data transmission device supplies power to the laser range finding system, so that the wire wearing can be prevented. The invention solves the technical problems that a small-sized laser radar internal device in the prior art is easy to wear and influences the service life.

The embodiment of the invention provides a terminal positioning method and device. The method comprises the steps of: obtaining a distance measurement result of each base station for a terminal, wherein the distance measurement result comprises the actual received signal strength of a wireless frame for distance measurement received by the base station and a distance parameter between the base station and the terminal obtained by distance measurement; acquiring the actual transmitting power of the terminal for transmitting the wireless frame; calculating the accuracy of each ranging result according to the actual received signal strength and distance parameter of each ranging result and the corresponding actual transmitting power; selecting a preset second number of target ranging resultsfrom the plurality of ranging results according to the accuracy of each ranging result; and calculating the position of the terminal by adopting the distance parameter of the target distance measurement result. According to the embodiment of the invention, the distance measurement result with a good sight distance propagation effect can be screened out from the distance measurement results of thebase stations, so that a more accurate positioning result is obtained.

The invention discloses a correction method, electronic equipment and a computer readable storage medium. The correction method comprises the following steps: acquiring an original depth map, acquiring a depth phase difference of each pixel in the image sensor according to a preset relation and coordinate values of pixel points in the original depth map, and acquiring a correction depth value of each pixel according to the depth phase difference of the pixel and an original depth value of the pixel. The original depth map comprises a plurality of pixel points, each pixel point in the original depth map is in one-to-one correspondence with each pixel of the image sensor, and the original depth value of each pixel point in the original depth map is the original depth value of each corresponding pixel; the preset relationship reflects a depth phase difference between the original depth map and the corrected depth map and a relationship between coordinate values of pixel points in the original depth map, the corrected depth map comprises a plurality of pixel points, and the pixel points in the corrected depth map are in one-to-one correspondence with the pixels of the image sensor; the corrected depth value of each pixel point in the corrected depth map is the theoretical depth value of each corresponding pixel.

The invention relates to the technical field of power system automation and particularly discloses a double-loop fault ranging method based on a distributed parameter model. The method comprises: busvoltages UM and UN at two sides of a fault line and current data II M , III M, II N and III N of a line protection device are collected; current fault components deltaII M, deltaIII M, deltaII N and deltaIII N corresponding to the current data II M, III M, II N and III N of the line protection device as well as respectively corresponding positive sequence, negative sequence and zero sequence components are calculated respectively; voltage fault components deltaUM and deltaUN corresponding to the bus voltages UM and UN at the two sides of the fault line as well as respectively corresponding positive sequence, negative sequence and zero sequence components are calculated respectively; a fault ranging equation general formula needed by a fault distance ratio d/L is solved and a fault distanceratio d/L is calculated; and the fault distance ratio d/L is outputted. In addition, the invention also discloses a double-loop fault ranging apparatus based on a distributed parameter model. With the ranging method, ranging of a fault point is realized under the circumstance that line parameters are unknown.

The invention discloses a power distribution network fault distance measurement method and system and an integrated traveling wave distance measurement device. According to the method, fault section determination is carried out to reduce the fault range, then impedance method distance measurement and traveling wave distance measurement are carried out, and all distance measurement results are integrated to obtain an accurate distance measurement result. The device is additionally provided with a distance measurement function on the basis of a conventional power distribution terminal, does notneed an additional independent device, is low in cost and is simple in construction.

The invention discloses an automatic driving control method for a low-pass obstacle, and the method comprises the steps: carrying out the two-stage visual recognition of the image content collected in the continuous driving process of an automatic driving vehicle, and obtaining the precise information of a target obstacle; combining a pre-constructed image distance measurement engine, and obtaining accurate distance measurement result of low-pass obstacle and vehicle; and finally, by utilizing the identified target obstacle information and the accurate distance measurement result, realizing an adaptive obstacle avoidance decision taking the obstacle type as the guide. According to the invention, accurate detection of the low-pass obstacle is realized, driving safety measures can be flexibly adjusted in cooperation with the detection result of the low-pass obstacle, and the purpose of reasonably avoiding or passing through the low-pass obstacle in a targeted manner is achieved.

The invention relates to a flight time obtaining method and device and an electronic device. The method comprises the following steps: obtaining the energy of first reflected light received in a firstperiod according to the energy of all reflected light received in the first period and the energy of second reflected light received in the first period; obtaining the energy of the first reflected light received in the second period according to the energy of the whole reflected light received in the second period and the energy of the second reflected light received in the second period; and obtaining the flight time according to the energy of the first reflected light received in the first period, the energy of the first reflected light received in the second period and the length of the first period.

The invention relates to an intelligent filtering type circuit monitoring receiving type USB interface comprising a USB interface body (1), a cuboid-shaped interface box body (2), a spring (3), a range finder sensor (5), a control module (4), a power supply, an electrically controlled telescopic rod (6), and a filter circuit (7). The power supply, the electrically controlled telescopic rod (6), and the filter circuit (7) are connected with the control module (4). According to the technical scheme, the hardware modules are connected to form the provided USB interface, so that the USB interface body (1) and the interface of connected USB equipment can be effectively protected, thereby effectively guaranteeing normal work of the USB interface body (1).

Embodiments of the invention disclose a capsule endoscope system and a distance measuring method for a capsule endoscope. The capsule endoscope system according to an embodiment of the invention comprises the capsule endoscope, a magnetic ball and a distance measuring device, wherein the capsule endoscope comprises a housing and an imaging element located in the housing; the imaging element shootsan image of the cavity wall at a predetermined position of a cavity by using automatic exposure parameters; the magnetic ball is used for controlling the position and the posture of the capsule endoscope in the cavity by adopting magnetic force so as to reach the predetermined position; and the distance measuring device is used for acquiring the automatic exposure parameters from the capsule endoscope to obtain the distance between the predetermined position and the inner wall of the cavity. According to the capsule endoscope system and the distance measuring method for the capsule endoscopein the embodiments of the invention, the distance to be measured can be conveniently and rapidly obtained.