39results about How to "Fast ranging" patented technology

The invention discloses a protection switching method in an Ethernet passive optical network, which comprises the following steps of: synchronizing in real time configuration data between an active port and a standby port of an optical line terminal (OLT); and performing dynamic bandwidth allocation on logical link identifiers (LLID) in the active and standby ports, performing normal dynamic bandwidth allocation on online LLIDs and performing the dynamic bandwidth allocation on offline LLIDs according to a set period by using the OLT. The invention simultaneously discloses a protection switching device in the Ethernet passive optical network, which comprises a synchronization unit used for realizing the real-time synchronization of the configuration data between the active and standby ports of the OLT, and a dynamic bandwidth allocation unit used for performing the dynamic bandwidth allocation on the LLIDs in the active and standby ports, performing the normal dynamic bandwidth allocation on the online LLIDs and performing the dynamic bandwidth allocation on the offline LLIDs according to the set period. The method and the device have the advantages of maximally reducing influenceto data transmission in the EPON and improving the quality of communication services of the EPON.

The invention discloses a power line fault location device and method. The method of the invention includes the following steps that: alternating-current high voltage is adopted to perform breakdown on a cable fault point; time difference of the arrival of fault traveling wave signals at line terminals is measured; and a distance from the fault point to the line terminal is calculated . The system is composed of an alternating-current high voltage generator, a traveling wave range finder and a corresponding measurement and control part. According to the power line fault location device and method of the invention, a variety of kinds of alternating-current high voltage generators can be adopted, such as a power-frequency alternating-current test device, a power-frequency resonance test device, a variable frequency resonance test device and an ultra-low frequency alternating-current test device; requirements of current test procedures can be satisfied; a cumulative effect on insulation caused by fault point direct current pulses or oscillation breakdown can be avoided; alternating-current high voltage is adopted to realize fault point breakdown for power lines such as a cable, and therefore, breakdown strength is high, and a breakdown effect is better; automatic ranging of a fault which occurs in a power line alternating current withstand voltage test can be realized, and alternating current withstand voltage testing and fault location can be completed simultaneously.

A Mobile Station apparatus for controlling a handover between a Serving Base Station apparatus and a Target Base Station apparatus is described. The Mobile Station includes a Handover Message Receiving device, a Processing device, a Handover device and a timer Value and a Timer device. The Handover Message Receiving device is adapted to detect receiving of a Handover message and wherein the Processing device is adapted upon detecting of the Handover message to calculate a Connection Hold Time value. The Handover device is adapted to send a Handover Indication message to the Serving Base Station apparatus, to start the Timer device with the Connection Hold Time value and to handover the connection from the Serving Base Station apparatus to the Target Base Station apparatus upon expiring of the Timer device.

The invention provides a de-noising algorithm of laser range finding signals of a power transmission circuit based on the improved EEMD. Filtering analysis and de-noising processing carried out on noise-containing laser range finding signals of the power transmission circuit can be effectively achieved. The method comprises steps of firstly establishing a power transmission circuit laser range finding signal acquisition system; carrying out rapid EEMD decomposition on the power transmission circuit laser range finding signals obtained through the experiment so as to obtain a series of intrinsic mode functions IMFs; then, selecting different numbers of IMFs to carry out adaptive filtering de-noising according to different noise forms; and finally, adding the de-noised IMFs so as to reconstruct the expected power transmission circuit laser range finding signals. An experiment result proves that by use of the method, noise in the power transmission circuit laser range finding signals canbe effectively reduced; rapid and precise range finding can be performed on targets influencing operation of the power transmission circuit; and safety and stability of the operation of the power transmission circuit are improved.

The invention discloses a rapid positioning method for a double-circuit line non-same-name phase crossover line ground fault. According to the method, fault phase voltage, fault phase current and zero sequence current at the protection installation position of a circuit line I of double circuits on the same tower are firstly measured, a binary search method is adopted, the phase characteristic that phases of relative coefficients before and after the non-same-name phase crossover line ground fault suddenly change to be smaller than zero from phases greater than zero and the amplitude value characteristic that the amplitude values of the relative coefficients at the non-same-name crossover line ground fault point are minimum are comprehensively utilized, so that accurate distance measuring on the double-circuit line non-same-name phase crossover line ground fault is achieved, high capacity for resistance to transition resistance and the load current is achieved, and it is guaranteed that no fault distance measuring dead zones exist when the double-circuit line non-same-name phase crossover line ground fault happens on an outlet in the forward direction. The binary search method is adopted for searching for the non-same-name phase crossover line ground fault point, the calculation amount is one half that of a common one-dimensional search method, and therefore rapid single-ended distance measuring on the double-circuit line non-same-name ground fault is achieved.

The invention discloses a two-dimensional multi-beam laser radar rapid scanning device and method based on a Blass matrix. A tunable laser source array is utilized to generate multiple paths of incoherent optical signals, and the phases of the multiple paths of incoherent optical signals are adjusted according to a preset beam direction by controlling a phase shifter in a Blass matrix, so that each path of optical signal has a specific phase difference when reaching each antenna unit, and an optical phased array is formed; and scanning in a dimension parallel to an antenna array plane is realized. The diffraction grating is etched on the waveguide end face of the antenna unit, and the diffraction angle of the diffraction grating is related to the wavelength of an optical signal, so that scanning in a dimension vertical to an antenna array plane can be realized by adjusting the central wavelength of the laser, and rapid scanning in two dimensions is realized. In addition, the rapid scanningdevice has the advantages of being compact in structure, easy to integrate, capable of flexibly expanding the number of beams and the like, and can meet various application requirements.

Disclosed is a portable internet system, and more particularly, to a method of supporting fast ranging upon handover. The method comprises calculating an action time based on a time when a handover confirmation message is received from a serving Radio Access Station (RAS), in a target RAS; and transmitting a fast ranging information message to a mobile station on the basis of the action time.

The invention provides a laser phase ranging system and method based on an FPGA. The system is characterized in that a signal system control processing unit controls a phase digital frequency synthesis source to generate and output signals of two frequencies at the same time, wherein one signal is used as a ranging signal, the ranging signal passes through a first low-pass filter and then is sentto a laser modulation circuit to modulate emitted laser, and the generated laser is reflected back by a measured target, captured and amplified by a laser receiving circuit and then enters a second mixer; and the other signal is used as a reference signal, the signal conditioning circuit completes data acquisition of a ranging signal, and the ranging signal is sent to a signal system control processing unit through an A/D conversion circuit for calculation to realize high-precision ranging. The system is advantaged in that laser ranging efficiency is high, precision is high, a use value is high, and a false alarm rate is low; design is carried out based on phase method frequency mixing, and low-cost rapid distance measurement in a hundred-meter range can be realized; error caused by inaccurate atmospheric refractive index is avoided by correcting, developing and correcting the system.

The invention belongs to the field of three-dimensional measurement, and particularly discloses a rapid distance measurement method and system based on double-sided point cloud information. The methodcomprises the following steps: 1) acquiring double-sided point cloud information of a to-be-measured object, and respectively calculating point cloud points of two point clouds; 2) performing rough registration on the two point clouds through point cloud point matching; 3) performing coordinate transformation on the two pieces of point cloud data, and eliminating invalid points influencing subsequent calculation; 4) minimizing the shape difference of the two point clouds to carry out fine registration; and 5) calculating the real distance distribution of the two point clouds in combination with the distance information of the sampling points. The method is suitable for distance measurement of two surfaces with an extremely short distance, can realize rapid measurement of the distance, such as measurement of the thickness distribution of a thin-walled object or the distance distribution of a narrow gap, under the condition of only depending on three-dimensional point cloud information,and has the characteristics of rapidness, simplicity, convenience and high precision compared with the existing measurement method.

The invention discloses a laser ranging sensor. The sensor comprises an optical axis movement, a laser diode, a first small transmitting lens, a second small transmitting lens, a receiving lens, a reflecting mirror and an avalanche photodiode, the front end face of the optical axis movement is provided with a transmitting channel and a receiving channel. The emission channel is sequentially provided with the first small emission lens and the second small emission lens in the direction from the front end face to the rear end face of the optical axis movement. The laser diode is aligned with thetransmitting channel; and the receiving channel is sequentially provided with the receiving lens and the reflecting mirror along the direction from the front end surface to the rear end surface of the optical axis movement. According to the invention, the unique optical systems of the reflector, the first small transmitting lens and the second small transmitting lens are adopted, so that rapid and accurate distance measurement is realized.

The invention provides a distance parameter calculation method, a dual-camera module and an electronic device using the method. The distance parameter calculation method is used for calculating a distance parameter related to the dual-camera module based on a disparity value between a first image and a second image shot by the dual-camera module, and comprises the following steps: establishing a relational expression of the distance parameter and the disparity value, wherein the relational expression is a sum of a product of at least two disparity terms and at least two corresponding coefficients, and the disparity item is a power of the disparity value; shooting a shot object on at least two predetermined distances by using the dual-camera module, and calculating at least two disparity values of the shot object between the first image and the second image; and calculating the at least two corresponding coefficients based on the at least two corresponding coefficients and the at leasttwo disparity values, and determining the relational expression. By adoption of the distance parameter calculation method, the dual-camera module and the electronic device, fast ranging or fast focusing can be achieved.

The invention provides a device for measuring a lymphedema period by indentation depth. The device is composed of a shell, a shell plate, a time screen, a parameter setting key, an item turning key, a cylindrical shell, a negative pressure key, a depth screen, an enter key, a start key, a chassis assembly, a measuring assembly and two shell holes. A suction nozzle negative pressure fixing method is adopted, and contact with the skin is safer and more stable; and an electrically-controlled pressing telescopic column is adopted, and current threshold value control is adopted, so that the repeatability and the pressing precision are higher; besides, the design of the upper limit and the time screen enables the delay measurement to be more scientific, the stop rebound to the upper limit in place is used as a timing starting point, the timeliness of the measurement and the measurement time after pressing can be set, the rebound interference of the recess is effectively avoided, and the setting of a unified measurement standard is facilitated. The receiver and the emission lamp are the basis of infrared distance measurement, wherein the infrared distance measurement is accurate, practical and rapid. The device is reasonable in design and suitable for judging the stage and swelling progress of the lymphedema patient.

The invention relates to the field of the communication technology, especially to a method for realizing a rapid on-line operation of a cable modem. A front-end CMTS and a cable modem are arranged and bidirectional network communication is realized by an HFC. The method comprises: the cable modem obtains a US ID list and sends a ranging request; the cable modem selects a US ID; the cable modem transmits an uplink level value; the CMTS compares the received level value with a preset receiving level value; if the received level value meets the set received level value, the ranging is done successfully and an IP address is obtained; and if ranging of the whole US ID list is not done successfully, a responding US ID is employed preferentially. The invention aims at providing a method for realizing a rapid on-line operation of a cable modem to overcome a defect of low on-line operation of the cable modem in prior art. A rapid on-line effect is realized by accelerating a ranging speed of a cable modem; inconvenience of the user is reduced; and the service quality of the network operator is improved.

The invention discloses an auxiliary measuring device and method for the width of inner and outer ring flow channels between blades of a cartridge receiver assembly, and belongs to the field of machinery. The auxiliary measuring device comprises a cross-shaped positioning frame and a body; stepped pins are arranged at two ends of the positioning frame; a first sliding block is arranged on the bodylocated on one side of the positioning frame, a first sliding block cover plate is arranged on the first sliding block, a first clamping jaw is arranged on the bottom surface of the first sliding block cover plate, and a first positioning pin is arranged on the first clamping jaw; and the body positioned on the other side of the positioning frame has the same structure. According to the auxiliarymeasuring device, the stepped pins on the positioning frame are clamped on the outer ring to position the whole device, and the two stepped pins are clamped on the outer ring of the cartridge receiver; the body is provided with the sliding blocks and the sliding block covers, the two sliding block covers are respectively provided with the clamping jaws with the positioning pins, the positioning pins are used for positioning the flow channel walls, and rapid distance measurement can be achieved with the help of measuring tools like calipers.

The invention aims to provide a distance measurement method and equipment based on intelligent wearable equipment, the intelligent wearable equipment comprises a data processing device, and a display device and a distance measurement device which are connected with the data processing device, and the distance measurement device receives a distance measurement instruction sent by the data processing device, obtains measurement data between the intelligent wearable device and the target object, calculates a first measurement distance, and sending the first measurement distance to the data processing device, or directly sends the measurement data to the data processing device; the data processing device obtains a distance measurement instruction triggered by a user, sends the distance measurement instruction to the distance measurement device, receives the first measurement distance and forwards the first measurement distance to the display device, or receives measurement data, calculates a second measurement distance and then sends the second measurement distance to the display device; and the display device receives and displays the first measurement distance or the second measurement distance, so that distance measurement can be directly and quickly carried out through the intelligent wearable equipment, distance measurement is simpler and more convenient, and the accuracy is higher.

The invention provides a distance measuring method, an electronic device and a computer-readable storage medium, wherein the distance measuring method comprises the steps of making a light emitting device emit light; sensing reflected light of the light by an obstacle through a light sensing device which is arranged at a preset condition in the light emitting device; and calculating distance between the obstacle and the light emitting device according to the time in emitting the light and the time in sensing the reflected light. The distance measuring method, the electronic device and the computer-readable storage medium can realize quick and accurate distance measurement and further reduce hardware cost.

The invention provides a reticle capable of being used for wind deflection compensation and ranging. The reticle comprises a reticle main body, a horizontal reference datum line and a vertical reference datum line are arranged on the side surface of the reticle main body correspondingly, the horizontal reference datum line and the vertical reference datum line are perpendicular to each other, a reticle center point is arranged on a pedal of the horizontal reference datum line and the vertical reference datum line, and a traditional MOA indicating region perpendicular to the horizontal reference datum line is arranged on the side surface of the reticle main body. According to the reticle capable of being used for the wind deflection compensation and ranging, the reticle is applicable to allmagnification through preposed reticle, and universality is improved; meanwhile, through the traditional MOA indicating region, a wind deflection compensation region and a falling compensation and ranging integrated region, the ranging and calculation can be conducted when a gun is used for collimation, the ranging, the calculation and the collimation are completed at the same time, the shootingefficiency is high, the time for finding a target by a shooter can be saved, the function is rich, and the operation is simple.