83results about How to "Easy and Accurate Acquisition" patented technology

The invention discloses a method for a traffic monitoring and business service quality guarantee strategy based on SDN. The method comprises the following steps: a. creating a network topology under the SDN architecture, configuring an Openflow switch, and establishing a connection between the switch and an SDN controller; b. providing an open northbound API interface on the SDN controller; c, obtaining, by an application system program, complete device information and link information; d, inputting the business to be guaranteed according to the business requirements; e, according to a sourcedestination address of the service flow, transmitting an algorithm class to calculate a scheduling path, and generating the optimal scheduling path of the current network; f. transmitting the scheduling path in e into a strategy generation class, generating a scheduling flow table in combination with the business guarantee strategy in d, and issuing the scheduling flow table into the switch; and g. adding a data transmission queue to a switch port according to the scheduling flow table in f. By adoption of the method disclosed by the invention, the stable operation of the network business, theefficient use of the link bandwidth and the maximum optimization of the whole network performance are maximally guaranteed.

The invention discloses a remote three-dimensional scanning system and method based on machine vision. The system comprises two parts, namely a hardware equipment part and a software system part. The hardware equipment includes image acquisition equipment, an optical filter, a light source, camera calibrating equipment, etc. In order to solve the problem of rapidly acquiring an object three-dimensional point cloud under a natural environment, the invention designs a set of three-dimensional scanning hardware equipment and further has a matching software system developed. Furthermore, by referring to an image acquisition method, a camera focal length calibrating method, a system calibrating method, an image processing method and a three-dimensional point cloud acquisition method, the system can rapidly achieve three-dimensional scanning on objects and further realize robustness of equipment on ambient light and also keep the three-dimensional point cloud calculation precision. Compared with the prior art, the system which is not limited by ambient light conditions during a three-dimensional point cloud acquiring process achieves a relatively high scanning speed and relatively high scanning precision. The system characterized by simple equipment structure and low cost is not limited by time and place when in use.

The invention discloses a shooting focusing method and device based on angular velocity detection. The method includes receiving an image captured by camera equipment; detecting angular velocity data of the camera equipment at preset intervals, comparing the angular velocity data of a current frame and the angular velocity data of a previous frame, when the difference between the angular velocity data of the current frame and the angular velocity data of the previous frame is smaller than a preset threshold, starting automatic focusing, and when the difference is lager than or equal to the preset threshold, detecting the angular velocity data of the next frame. According to the shooting focusing method and device, by means of a gyroscope, whether focusing is to be carried out is judged. Data of the gyroscope can be directly obtained from a bottom drive, the operation state of the equipment can be obtained quickly and precisely, focusing is precisely and conveniently recognized, and the phenomenon that a focusing thread always occupies a CPU, and accordingly resources are wasted is avoided.

The embodiments of the present invention provide a virtual identity association recognition method and device. The method includes the following steps that: pre-stored access information corresponding to accounts and the account types of the accounts are obtained, wherein the access information of the accounts comprises one kind of information selected from the geographical locations of terminals that log in the accounts and time periods when the terminals are located in the geographical locations when the accounts are in login states; the parameter values of association parameters between the accounts are calculated according to the access information corresponding to the accounts and a pre-constructed calculation model of the association parameters; and association relationships between the accounts are determined according to the calculated parameter values of the association parameters, the account types and a preset association relationship recognition algorithm. When being applied to virtual identity association recognition, the virtual identity association recognition method and device of the invention can identify association relationships between the accounts of different types of service platforms.

The invention provides a prior control system and a method for road signals. The prior control system for the road signals comprises a vehicular detection device, a roadside transmission device and a control device of an annunciator; and the vehicular detection device is used for collecting the running information of a vehicle and transmitting the collected running information to the roadside transmission device by a wireless communication mode, the roadside transmission device is used for transmitting the received running information to the control device of the annunciator by a wired transmission mode, and the control device of the annunciator is used for controlling the running of a traffic signal lamp at an intersection according to the received running information. The running information of the vehicle can be accurately obtained by the vehicular detection device. Moreover, when the vehicle arrives at the position of the intersection, the vehicular detection device can be in wireless communication with the roadside transmission device, the running information is accurately transmitted to the roadside transmission device, the received running information is also transmitted to the control device of the annunciator by the roadside transmission device, the phenomenon of missing detection of the running information is effectively avoided, and the reliability of the prior control system for the road signals is enhanced.

The invention relates to a quick acquisition method for charging and discharging curves under different working conditions of lithium batteries. The acquisition method for different charging and discharging curves of the lithium batteries comprises the following steps that (1) data of lead acid batteries is acquired, and a linear voltage relation at different given constant-current multiplying powers in different intervals of the lithium batteries and a linear voltage relation table fm() at different temperatures are established; (2) a complete charging voltage and SOC curve Chavolni(sock) anda discharging voltage and SOC curve Disvolni(sock) under the constant-current condition are acquired. The acquisition method of different charging and discharging curves of the lithium batteries hasthe advantages that each kind of battery does not need to be subjected to different constant-current charging and discharging tests multiple times for acquiring the corresponding charging and discharging voltage and SOC curves, the corresponding charging and discharging voltage and SOC curves at different temperatures can be corrected according to environment temperatures, and accordingly the SOCcalculation of the lithium batteries is more accurate.

The invention relates to the technical field of communication and discloses a router adaptation method and device and a terminal device to be used for acquiring the relevant information of functional pages of a router automatically, quickly and accurately. The method comprises the steps of identifying a router to be adapted and acquiring the model information of the router to be adapted; acquiring the adaptation script of the router to be adapted according to the model information, wherein the adaptation script comprises functional interfaces corresponding to all the functions of the router, and the functional interfaces are formed by abstract encapsulation of page elements of all functional pages. The relevant information of a certain function of the router is acquired by calling the corresponding functional interface in the adaptation script by means of an application program, and relevant information is fed back to a calling layer as a returned value. The router adaptation method and device and the terminal device are mainly used for acquiring relevant function information of the router.

The simulation testing method of the frequency characteristic of full-digital closed-loop fiber optic gyro system: it comprises the following steps (1) the signal processing system that is made up of FPGA chip and EPROM chip produces digital signal inside full-digital closed-loop fiber optic gyroscope system, comprises digital step signal, digital Pulse signals and digital sinusoidal signals of different frequencies; use the FPGA signal processing system to superimpose the digital signals generated in step (1) on the feedback channel of the all-digital closed-loop fiber optic gyro system; (3) use the DSP signal detection system to quickly collect the above-mentioned The input and output of the all-digital closed-loop fiber optic gyroscope system under digital signal input; (4) use the system identification principle to perform least squares processing on the test data of the full-digital closed-loop fiber optic gyroscope system collected above to obtain the frequency of the all-digital closed-loop fiber optic gyroscope system characteristic. The invention eliminates test equipment errors and human errors in engineering applications, has advantages in precision, reliability, debugging manufacturability and the like, and reduces costs.

The invention relates to the field of communication, in particular to an anchor station quality evaluation method and device under a 5G NSA network. The method mainly comprises the following steps: acquiring anchor station quality index data; according to the evaluation dimension, selecting an evaluation factor needing to be evaluated from the quality index data; configuring different weights forthe evaluation factors according to evaluation service requirements; and according to the values and the weights of the evaluation factors, calculating a weighted total score of each evaluation factorof the preset evaluation area, and taking the weighted total score as a quality score of the preset evaluation area. According to the invention, the quality condition of each anchor station can be conveniently and accurately obtained, support is provided for 5G NSA network optimization, and the user perception of 5G service users is improved.

The invention discloses an elevator floor information acquisition method and device and external elevator equipment. The method comprises the steps: acquiring the on-off state change of an elevator button; according to the on-off state change, determining the floor of an elevator. The external elevator equipment comprises at least one state sensor and one or multiple processors, wherein the state sensor is used for detecting the on-off state change of the elevator button; when one or multiple programs are executed by one or multiple processors, one or multiple processors realize the elevator floor information acquisition method. The elevator floor information acquisition method solves the problems of the prior art that in order to realize elevator floor information acquisition, an elevator control system needs to be improved, control is complex, the cost is high, and the reliability of the elevator control system is affected. The elevator floor information acquisition method realizes the convenience in elevator operation, accurately and conveniently acquires the floor of the elevator, and reaches the effects of safety and high reliability.

The invention provides a method for obtaining a rock matrix bulk modulus. The method comprises: (A), an equivalent rock matrix bulk modulus of a target logging depth point is determined according to logging information of the target logging depth point and a preset number of logging depth points adjacent to each other in an up-down mode; (B), a changing interval and a changing increment of a dry rock poisson ratio of the target logging depth point are determined; (C), a changing interval and a changing increment of the ock matrix bulk modulus of the target logging depth point are determined; (D), inversion is carried out by using an adaptive matrix mineral modulus inversion method on the condition of double convergence so as to obtain an optimum adaptive rock matrix bulk modulus of the target logging depth point; and (E), average processing is carried out on the equivalent rock matrix bulk modulus and the optimum adaptive rock matrix bulk modulus of the target logging depth point to obtain a rock matrix bulk modulus of the target logging depth point. With the method, a rock matrix bulk modulus with high precision and stability can be obtained; and a favorable foundation is laid for follow-up oil and gas reservoir prediction.

The embodiment of the invention provides an optical fiber distributed monitoring system and method, and relates to the field of optical fiber sensing. The system includes a laser, an acousto-optic modulator, a phase matching interferometer, a photoelectric detector, and a phase demodulation module. The backward Rayleigh scattered light, containing the parameter information, of a sensing optical fiber enters the phase matching interferometer and then enters the two arms of the phase matching interferometer. The phases of the light of two arms of the phase matching interferometer are modulated through a first modulation waveform and a second modulation waveform, and then the light of two arms of the phase matching interferometer interferes with each other to generate interference light. Thephotoelectric detector converts an optical signal into an electric signal, and the phase demodulation module processes the electric signal based on the Hilbert algorithm to obtain the parameter changecondition of a to-be-tested environment. Since there is no need of the collection of the modulation waveform when the Hilbert algorithm is used for processing, and the amplitude difference between afirst modulated wave and a second modulated wave is greater than or equal to an amplitude difference threshold capable of enabling the phase difference of the two arms of the phase matching interferometer to be 2*Pi, the processing can be performed.

The invention discloses a washing machine and a wet cloth weighing method and device thereof. The method comprises the following steps: after the washing machine enters a dewatering program, controlling the rotating speed of a dewatering motor of the washing machine to be increased from zero speed; in a stage of increasing the rotating speed of the dewatering motor, acquiring first total power required for the dewatering motor which drives an inner barrel of the washing machine to rotate by a first number of turns in a process of increasing a first rotating speed to a second rotating speed; in a second stage of stable running at the second rotating speed of the dewatering motor of the washing machine, acquiring a second total power required for the dewatering motor which drives the inner barrel of the washing machine to rotate by a second number of turns in a process of stable running at the second rotating speed, and acquiring an average torque ripple value of the dewatering motor which drives the inner barrel to rotate in the process of stable running at the second rotating speed; and calculating weight of clothes in the inner barrel according to the first total power, the second total power and the average torque ripple value. According to the method of the invention, wet cloth weight of the clothes can be conveniently and accurately acquired in a dewatering process.

The invention relates to a method for simultaneously measuring the specular reflectivity, the diffuse reflectivity and the total reflectivity of a material based on an integrating sphere. The specular reflectivity, the diffuse reflectivity and the total reflectivity of the material can be rapidly, conveniently and accurately obtained through the method. The method for measuring the reflectivity comprises the following steps: arranging a light trap on a traditional integrating sphere device, respectively measuring in the opening state and the closed state of the light trap, and carrying out data processing to obtain the specular reflectivity, the diffuse reflectivity and the total reflectivity of the material.

The invention specifically relates to an intelligent parking method for a bus, and the method comprises the following steps that (1), a user inputs identity information and / or riding information at anintelligent IC card mobile terminal; (2), the intelligent IC card mobile terminal transmits the information to a vehicle-mounted intelligent terminal; (3), the vehicle-mounted intelligent terminal receives the information, extracts the information and stores the information in a second storage unit; (4), a processor calculates the number of passengers who are waiting for a bus at each stop and the number of passengers who are ready to get off the bus at each stop according to the extracted information, and reminds a driver of the numbers when the bus arrives at each stop; (5), the drive correspondingly opens a front door or a rear door of the bus according to the prompt; (6), passengers swipe cards to pay for the riding, and complete the riding process. The method provided by the invention can enable a user to conveniently input the riding information through the intelligent IC card mobile terminal, and the riding information is transmitted to the vehicle-mounted intelligent terminal,thereby enabling the bus driver to obtain the get-on and get-off information at each stop, achieving the targeted parking, and avoiding the time and energy loss caused by parking at each stop.

The invention discloses a statistical method for search engine space occupation. The method includes the following steps: a corresponding user capacity occupation list is stored for each user in advance, the user capacity occupation list includes user information and corresponding capacity quota information, wherein the capacity quota information includes capacity allowing the user to use and occupied capacity; the index creation request of a user, which includes user information and the content of an index to be created, is received; according to the user information, a corresponding user capacity occupation list is found; the content of the index to be created is statistically analyzed, and the amount of the memory space occupied by the content of the index to be created is obtained; the amount of the memory space occupied by the content of the index to be created is added to the occupied capacity, and the occupied capacity of the user is updated. The invention also discloses a statistical system for search engine space occupation. The invention can be adopted to carry out corresponding capacity management according to different users.

The invention provides an electric heater state detection control method, a computer readable storage medium and an air conditioner. A feedback current value when the electric heater works is detected, electric heater control circuit self-inspection and electric heater body self-inspection are carried out sequentially according to the feedback current value, and if any one of the electric heater control circuit and the electric heater body has a fault in the self-inspection process, a signal is sent to remind and stop work of the electric heater. The real working state of the electric heater is accurately judged through the current value, abnormity is found in time, the electrical safety problem caused by faults of the electric heater body and the electric heater control circuit can be prevented, the intelligent control level of the air conditioner is further improved, and influence caused by faults of the electric heater is reduced.

The invention provides a feature analysis based data access method, storage apparatus and storage system. The method comprises the steps that file feature analysis is performed on to-be-stored files to acquire file feature values of the to-be-stored files; a storage apparatus generates a file feature value record according to the file feature values of the to-be-stored files and stores the file feature value record and the corresponding relation between the file feature value record and the to-be-stored files to a preset mapping table; when receiving a data management command of a storage server, the storage apparatus generates a condition file feature value corresponding to the data management command, wherein the condition file feature value is used for representing query conditions corresponding to the data management command; the storage apparatus matches the condition file feature value and the file feature value record in the preset mapping table to acquire a file name of a required target file or a physical address of a target file. The method, the apparatus and the system can effectively reduce loads of storage service and prevent performance decrease of a data storage server caused by excessive loads.

The invention relates to the technical field of central air-conditioning control systems, in particular to an air-conditioning water system pump-valve integrated control device and a control method. The device comprises a controller, and the controller comprises an energy valve information obtaining unit and a most unfavourable loop selecting unit which are connected in sequence; the energy valveinformation obtaining unit is connected with at least one intelligent energy valve to obtain the valve location opening values of the intelligent energy valves, and the most unfavourable loop selecting unit determines the most unfavourable loop according to the valve location opening values of all the intelligent energy valves; a pump package variable frequency controller calculates adjustment frequency according to the valve location opening value of the most unfavourable loop and sends the adjustment frequency to a motor of a water pump. Based on the most unfavourable loop, the water pump iscontrolled in a variable frequency mode, the opening value of the most unfavourable loop reaches the reasonable opening value range, the steps are repeated periodically so that all the loops can be kept in the reasonable opening valve range, and the optimal energy-saving effect is achieved.

The invention relates to an electromagnetic measurement-while-drilling system and method based on an adjacent well receiving antenna. The system comprises a drill pipe emitting assembly, an adjacent well receiving assembly and a ground display terminal. The drill pipe emitting assembly is inserted into the bottom of a to-be-measured well; the adjacent well receiving assembly is arranged inside an adjacent well; the upper end of the drill pipe emitting assembly is electrically connected with the adjacent well receiving assembly, and the lower end of the drill pipe emitting assembly is in wireless connection with the adjacent well receiving assembly; and the adjacent well receiving assembly is electrically connected with the ground display terminal. The adjacent well receiving antenna is adopted for receiving signals, ground power frequency interference can be avoided, propagation loss of electromagnetic wave signals on an upper stratum of an adjacent well receiver, the measurement depth of the electromagnetic measurement-while-drilling system is increased greatly, and the electromagnetic measurement-while-drilling system and method based on the adjacent well receiving antenna can be widely applied to exploration and development of new energy resources like coal bed gas, shale gas, geothermal wells and hot dry rock.

The invention relates to a magnetoacoustic emission detection method for fatigue damage of a ferromagnetic metal component. The method comprises the steps of firstly, generating an excitation magneticfield by using a sine wave voltage signal, gradually increasing a loading voltage until a bimodal envelope magnetoacoustic emission signal with an obvious tail peak is obtained, and taking a corresponding voltage peak value as a reference voltage; then, generating an excitation magnetic field by using a square wave voltage signal equal to or higher than a reference voltage, and acquiring a magnetoacoustic emission signal with a T-shaped envelope; and thirdly, calculating the average value of peak-to-peak values of the magnetoacoustic emission signal in multiple periods to serve as a characteristic parameter, and enabling the characteristic parameter to have inflection point change along with the development of the initiation and expansion of the fatigue crack, thereby identifying the initiation and expansion of the fatigue micro-crack, and giving a timely early warning for the failure of the component. According to the invention, the T-shaped envelope signals are obtained through square wave voltage excitation, the waveform of the T-shaped envelope signals is clear and easy to distinguish, on the basis that the reference voltage ensures enough magnetic field intensity, the anti-noise capacity of MAE is greatly improved, MAE fatigue monitoring engineering application is achieved, and the detection result is stable and reliable.

The invention relates to a finished vehicle chassis detection system, which comprises a vehicle information acquisition module, a detection module, an information processing module, a control module and a detection information storage module, and the vehicle information acquisition module is used for photographing a vehicle and acquiring vehicle information, the acquisition process is convenient and accurate, and the whole detection speed is improved; for the detection module, a linear array camera can be used for quickly shooting the moving automobile chassis to enable rapid detection, so that the detection efficiency is improved, the automobile chassis can be shot in different areas, and the automobile chassis can be scanned through a 3D scanner to generate three-dimensional coordinate data; and the information processing module judges scratches or defects of the automobile chassis, the fault defect position and the scratch position are shot in a targeted mode through the control module, the whole detection process is accurate and rapid, the problems of missed judgment and incomplete vision caused by manual detection are avoided, fault and scratch position pictures are shot in atargeted mode, and technicians can conveniently overhaul related fault areas in the follow-up process.

The invention relates to a color card standard sample of a zirconia denture as well as a preparation method and a use method. A dense gradient nanostructure with a bionic tooth matrix and an enamel fish scale-like smooth surface structure similar to natural teeth are prepared by using a hydrothermal method, a 3D-colloidal molding process and a surface layer coating technology. The color card standard sample is prepared by adopting a zirconia material, and can directly transmit optical information such as texture and permeability of a zirconia repair material; meanwhile, the color masking effect of discolored teeth is taken into account, so that the design is more scientific and reasonable, and the colorimetric deviation caused by different materials is eliminated; by adopting a bionic zirconia denture color card standard sample, the texture of tooth enamel and the texture of dentin can be compared, and further optical texture information in an oral cavity is accurately transmitted; information of to-be-processed denture at the processing end is favorably acquired, so that the zirconia denture consistent with the colorimetric result is prepared.

The invention relates to a height measuring system for a gas storage cabinet. The height measuring system comprises a radar level meter, a wind-solar hybrid power supply and a data receiving display device, wherein the radar level meter is arranged on the top of the gas storage cabinet and outputs the monitored height data of the gas storage cabinet, the wind-solar hybrid power supply is connected with the radar level meter and provides electric energy sources for the radar level meter, and the data receiving display device is connected with the radar level meter and receives and displays the height data output by the radar level meter. According to the technical scheme of the height measuring system provided by the invention, the height measuring system for the gas storage cabinet has the advantages that the installation is simple and convenient, the measurement precision is high, the height of the gas storage cabinet can be conveniently and fast obtained, the mistake reporting or missed reporting phenomena can be avoided, and the safe management of the gas storage cabinet can be favorably realized.

The invention provides an elevator car position detection device and method. The elevator car position detection device comprises a first datum collecting module, a second datum collecting module, N car collecting modules and a processing module, wherein the first datum collecting module is used for collecting air pressure data at the first height in a preset area, the second datum collecting module is used for collecting air pressure data at the second height in the preset area, and each car collecting module is arranged on a corresponding car in the preset area and used for collecting air pressure data at the position where the corresponding car is located, wherein N is a positive integer, and the processing module is used for obtaining position information of each car according to the air pressure data at the first height, the air pressure data at the second height and the air pressure data at the position where each car is located. According to the elevator car position detection device and method, the positions of the elevator cars can be obtained conveniently and accurately.

The invention discloses a sheet metal part detection device and relates to the field of sheet metal part detection equipment. The sheet metal part detection device comprises a transmission rack. The transmission rack is rotatably provided with a conveyer belt. The conveyer belt is in drive connection with a driving motor. An image acquisition device is arranged above the transmission rack. The image acquisition device is electrically connected with a controller. The driving motor is in controlled connection with a controller. The controller is also electrically connected with a display screen.In order to solve the problem of low efficiency and accuracy in the prior art, the device detects punched holes in sheet metal parts through the image acquisition device and the controller, thereby greatly improving efficiency and accuracy in detecting the punched holes in the sheet metal parts.

The invention relates to the field of automatic monitoring, in particular to a silo stacking height monitoring device, system and method. The system mainly comprises at least one data processing module and at least one group of monitoring modules; each group of monitoring modules comprises at least one laser detection assembly and a shell; the laser detection assembly is hermetically packaged in the shell; and an electrical interface of the laser detection assembly is used as an external electrical interface of the monitoring module. The shell comprises a light-transmitting window and a valve,the light-transmitting window corresponds to a monitoring light outlet and a reflected light receiving port of the laser detection assembly in position, the valve is arranged on the outer side of thelight-transmitting window, the light-transmitting window is completely covered by the valve when the valve is closed, and the light-transmitting window is exposed to the outside when the valve is opened; and the data processing module is coupled with a corresponding port of the external electrical interface of each group of monitoring modules. The heights of different positions of the top end ofthe stacked material can be conveniently and accurately obtained through the multiple laser distance measuring modules, so that the overall height of the stacked material is monitored.

The invention discloses an automobile trafficability parameter measuring method, which comprises the following steps of: parking a to-be-measured automobile on a horizontal supporting device, keeping a steering wheel to have no turning angle, and performing 3D point cloud scanning on front tires and rear tires of the automobile, a lifting supporting plane and the surface of the bottom of the automobile by using a three-dimensional laser scanner; importing the obtained point cloud of the front tire and the rear tire of the vehicle, the point cloud of the lifting support plane and the point cloud of the bottom of the vehicle body into software; determining a central plane which is perpendicular to the vehicle body bottom point cloud and enables the vehicle body bottom point cloud to be bilaterally symmetrical along the length direction of the vehicle body bottom point cloud; performing plane fitting processing on the lifting support plane point cloud, and taking a plane generated by fitting as a ground plane; determining and measuring an approach angle, a departure angle and a longitudinal passing angle; according to the digitalized automobile trafficability parameter measurement method, manual measurement is not needed during automobile trafficability parameter angle measurement, and the measurement efficiency and precision are improved.

The invention relates to an engine exhaust parameter detecting device for matching a muffler with an engine, which belongs to the technical field of noise control in an automobile exhaust system. The detecting device comprises a measuring tube and an acoustic load variation tube, wherein the measuring tube is connected with an engine exhaust manifold, and the other end of the measuring tube is connected with an inner tube of the acoustic load variation tube. A dynamic pressure sensor mounting seat, a static pressure sensor mounting seat and a thermocouple mounting seat are arranged on the measuring tube, the acoustic load variation tube consists of the inner tube and an outer tube, the inner tube extends into the outer tube, and a limiting clamp ring and a high-temperature sealing ring are arranged on each of the inner tube and the outer tube. By the aid of the detecting device, fluid parameters such as temperature, static pressure, dynamic pressure and flow velocity and acoustic parameters such as source impedance, source strength parameters and the like of an engine exhaust system and can be quickly measured, so that theory basis is provided for simulation and matching design of an automobile exhaust and muffling system.

The invention discloses a distance detecting mechanism for measuring lifting distance of a hoisting device. The mechanism comprises a driving wheel which is propped to a hoisting rope, a gear countingpart, and a transmission gear assembly which is mounted between the driving wheel and the gear counting part, wherein the gear counting part is provided with multi-stage counting gear assemblies which are sequentially engaged based on a preset transmission route; each of a driving shaft and a driven shaft of the counting gear assembly at each stage is fixedly provided with a counting plate; a counting plate on each driven shaft rotates by a preset angle as the counting plate on the corresponding driving shaft rotates by a circle, and thus all counting plates can record the number of rotatingcircles of the driving wheels on the preset transmission route in a scale mode; the hoisting rope is pulled to drive the driving wheel to rotate, and the rotating driving wheel drives a transmission gear assembly to rotate, and finally the transmission gear assembly drives the engaged gear counting part to rotate. When in hoisting, the lifting distance of the hoisting rope can be accurately calculated without excessive workers, and thus the lifting distance of the hoisting rope can be conveniently accurately acquired.