102results about How to "Solve operational troubles" patented technology

The invention relates to an intelligent anti-theft system of an electric motor car and a control method thereof, and the intelligent anti-theft system comprises an RFID (radio frequency identification) circuit, a central control unit and an automatic control lock module. The central control unit comprises a main control MCU (micro controller unit), an acousto-optic steering circuit, an oscillation alarm circuit, a loudspeaker circuit, an electronic switch and a state monitoring circuit. The RFID circuit collects ID (identification) card information and operating order of a user, the data are sent to the main control MCU for processing so as to form a control signal which is sent to a drive circuit for driving a motor; a lock mechanism is driven to push and pull a lock post to stretch out and draw back through a speed reduction gear box; and an expansion brake lock is locked. The system provided by the invention is high in integration degree, simple in operation and high in safety and reliability, solves the problems of complex operation and high possibility of damage of the existing mechanically electric door lock, as well as inconvenience in operation and high possibility of being blocked by mud of a mechanical expansion brake lock (or a head lock), lowers the cost of manufacturers, and integrates the RFID identity identification, electronic lock, electronic expansion brake lock (or head lock), anti-theft alarm and acousto-optic steering indication.

The invention discloses a vertical impact tester which comprises a base frame module, an impact body module, a quick clamp module and at least one inertia triggering module .The base frame module forms a base framework of the vertical impact tester, and at least two guide shafts are longitudinally and vertically arranged in the base frame module .The impact body module comprises a movable carrier plate and a punch installed at the lower end of the movable carrier plate, and the movable carrier plate is connected with the guide shafts through linear bearings .The quick clamp module is installed on a bottom plate on the lower portion of the base frame module, opposite to the punch and used for holding an elastic workpiece to be subjected to impact testing .The inertia triggering modules are installed on the movable carrier plate .The impact body module impacts the elastic workpiece, rebounds and then triggers a locking action, and the impact body module is locked to the base frame module so as to prevent the impact body module from repeatedly colliding with the elastic workpiece .According to the technical scheme, modular design is adopted, the impacting action can be automatically locked after impact testing so as to prevent the elastic workpiece from being impacted twice or many times, and accuracy of testing is guaranteed.

The invention discloses a device and a method for simulating the temperature variation of a Pt100 thermal resistor, which relates to the field of semiconductors and aims to solve the problem of troublesome operation by manually realizing the resistance adjustment and control of the Pt100 thermal resistor to further simulate the temperature variation of the Pt100 thermal resistor in the prior art. The technical scheme provided by the invention is that the device comprises a communication interface circuit, a logic control circuit and a simulating-bus output circuit, wherein the simulating-bus output circuit comprises a plurality of relays, a resistance-outputting port and an adjustable resistor, the two contacts of each relay are connected with two ends with corresponding resistance values on the adjustable resistor, and the communication interface circuit is used for controlling the on-off of the relays through the logic control circuit, so that the corresponding resistance value of the closed relay is output. The device and the method for simulating the temperature variation of the Pt100 thermal resistor provided by the embodiment of the invention can be applied to the delivery testing and inspecting processes of cabinet bodies based on control equipment, such as PLCs (Programmable Logic Controller), DCSs (Distributed Control System) and the like.

The invention relates to a hydrate development layered physical simulation experiment device. The hydrate development layered physical simulation experiment device comprises a pressure bin, a simulation assembly and a blocking assembly, wherein the pressure bin is internally provided with a test cavity, an exploitation opening communicating with the test cavity is formed in the top end of the pressure bin, and an exploitation pipe with an opening extending into the test cavity is inserted into the exploitation opening; the simulation assembly is placed in the pressure bin and comprises a pair of upper simulation kettle and lower simulation kettle which are matched mutually, the lower simulation kettle is driven by a lifting mechanism to move into and move out of the upper simulation kettle, the upper simulation kettle is internally provided with a partition plate for partitioning the cavity of the upper simulation kettle into a cover layer and a hydrate layer which are distributed in the up-down direction, and a gas layer is arranged in the lower simulation kettle; and the upper simulation kettle and the lower simulation kettle are blocked by the blocking assembly. The hydrate development layered physical simulation experiment device has the advantages that the design of the pressure bin is adopted, thus the partition plate can be moved away under the constant-pressure and constant-temperature situations after hydrates are formed, and the problems that the time of forming the hydrate by multiple layers of settlings is long, and layering of the hydrates is difficult due to the water gravity are solved.

The invention provides a vehicle speed-limiting control system and a control method. The control method comprises the following steps: judging whether a speed-limiting setting signal is received, if so, using a current speed of a vehicle as a speed-limiting value, and entering a speed-limiting mode; under the speed-limiting mode, detecting a current driving speed of the vehicle in real time, and judging whether a difference value between the current driving speed of the vehicle and the speed-limiting value is within a setting range; and if the difference value between the current driving speedof the vehicle and the speed-limiting value is within the setting range, performing driving torque reducing treatment on the vehicle. According to a technical scheme provided by the invention, only the speed-limiting setting signal needs to be sent to the vehicle, so that the current driving speed of the vehicle can be taken by the vehicle as the speed-limiting value for limiting the speed of thevehicle; and the vehicle speed-limiting control system and the control method are not only simple and convenient in operation, but also low in cost, and simple in control logic.

The invention relates to a car parts drilling device, and belongs to the technical field of boring machines or drilling machines or boring and drilling devices specially applicable to special workpieces. The car parts drilling device comprises a transmission shaft and a drilling mould, and a plurality of pairs of holes with different inner diameters are formed in the drilling mould. A frame is arranged below the transmission shaft in a sliding connection mode, and a motor and a box body with a lower end opening are arranged in the frame; the output end of the motor is connected with an expansion link, and the expansion link is connected with a small drill bits used for drilling; and the small drill bit is sleeved with large drill bits, and the small drill bit is matched with the large drill bits. The large drill bits are provided with bearings in a sleeving mode, one sides of the bearings are connected to the side wall of the frame in a sliding mode, the other sides of the bearings arefixedly connected with a sliding plate, and the sliding plate is connected to the inner wall of the frame in a sliding mode. A water bag filled with water is arranged in the box body, the water bag is connected with a fulcrum bar, and the fulcrum bar is fixedly connected with the sliding plate. According to the technical scheme, the drilling mould is used for matching the sizes of inner diametersof inspection holes and the displacement distance of the large drill bits, and the car parts drilling device can be used for machining the holes with different inner diameters, the operation is convenient, and the practicability is high.

The invention relates to the technical field of equipment of electric wire looping machines and discloses a looping coil winding main engine of a looping machine applied to electric wire production. The looping coil winding main engine comprises a case, wherein a motor base is fixedly connected to the bottom of an inner cavity of the case; a motor is fixedly connected to the top of the motor base;and a spindle is fixedly connected to an output shaft of the motor. The looping coil winding main engine of the looping machine applied to the electric wire production has the beneficial effects thatan outer groove is added in the outer surface of a coil winding cylinder and an annular groove is formed inside, and an adjustment sleeve with a cam is sleeved into the annular groove in a threaded manner; through rotation of the adjustment sleeve, a contact position between a lifting rod and a raised block is changed, so an outer plate can be moved up and down; an electric wire is wound on the outer plate, so a coil winding inner diameter is changed; the inner diameter of a wire coil can be changed according to different target diameters; adaptability of the coil winding main engine is effectively enhanced; functionality of a coil winding machine is enhanced; troubles generated from replacement of the coil winding cylinder are reduced; and cost for purchase of different coil winding cylinders is reduced.

The invention discloses a children sphygmomanometer. The children sphygmomanometer comprises a cuff and a blood pressure measuring device, wherein an air inflation bag is arranged in the cuff; the air inflation bag is provided with two separating lines along the width direction, so that three independent air bags of a first air bag, a second air bag and a third air bag which are sequentially connected are enabled to be formed by the air inflation air bag. According to the children sphygmomanometer disclosed by the invention, the suitable cuff width can be adjusted according to different treatment objects, the operation trouble caused by the fact that cuffs of different widths need to be chosen in the prior art can be avoided, the operation can be simple and convenient, and the efficiency is higher.

The invention relates to feeding equipment, in particular to blast-furnace process feeding equipment. The technical problem to be solved is to provide blast-furnace process feeding equipment, to solve the problem, the blast-furnace process feeding equipment is provided. The blast-furnace process feeding equipment comprises a base plate, a heating box, a heating kettle, a vibrating device, a feeding hopper and the like; the vibrating device is arranged at the left end of the top of the base plate, a top supporting frame is arranged above the base plate, a smashing device is arranged on the lower end of the left side of the top supporting frame, the heating box is connected with the lower end of the right side of the top supporting frame, the heating kettle is arranged on the heating box, the feeding hopper is arranged above the left side of the heating kettle, and the feeding hopper is arranged below the smashing device and located above the vibrating device. According to the blast-furnace process feeding equipment, smashing of caked or solid smelting raw materials is achieved, the follow-up heating treatment of the smelting raw materials is accelerated, and meanwhile the vibrated feeding hopper can prevent the smelting raw materials from adhering to the wall of the feeding hopper.

The invention discloses surface cleaning equipment for new energy automobile processing. The equipment comprises a shell and an air heater. A first sliding sleeve is arranged on the outer wall of a first sliding rail, the inner wall of the first sliding sleeve and the outer wall of the first sliding rail form sliding clamp, a first sleeve is arranged above the first sliding sleeve, the bottom of the first sleeve is fixedly connected with the top of a first sliding sleeve, first screw rods are arranged on the inner wall of the first sleeve, the outer walls of the first screw rods are in threaded connection with the inner wall of the first sleeve, and the left sides of the outer walls of the first screw rods are rotationally connected with the lower portion of the left side of the shell through a bearing. According to the surface cleaning equipment for new energy automobile processing, through cooperation of a housing, the shell and the first screw rods, the two first screw rods can drive two clamps to get close to each other and get away from each other during rotation, adjustment of the distance between the clamps can be implemented, the problem that the distance between the two clamps cannot be changed during work of an existing device is solved, and it is avoided that cleaning cannot be carried out on parts of different sizes, and limitation does not exist.

A centralized control device of a household hybrid air-conditioning system and a control method thereof relate to the technical field of the control devices of air-conditioning systems which regulate indoor temperature and humidity by utilizing a direct digital controller. A first signal output end of a main control panel is connected with a signal input end of a water distributor and collector, an electric heating valve is arranged on the water distributor and collector, and a signal output end of the water distributor and collector is connected with the signal input end of a secondary side water pump; a second signal output end of the main control panel is connected with a first signal input end of a DDC, and the signal output end of the DDC is connected with a heat pump and the signal input end of a fresh air unit; a three-way valve of the fresh air unit and a plate type heat exchange valve are respectively connected with the direct digital controller. The invention realizes the simple operation, the function integration and the purpose of being capable of operating indoor temperature and humidity of various signal rooms.

The invention relates to ananti-theft window.The upper end of an anti-theft bar extends intoa push-pull track on the lower side, the anti-theft window further comprises a laser alarm, the laser alarmcomprises a laser transmitter and a laser emitting circuit of a first power source, the laser alarm further comprises a receiving detecting circuit, the receiving detecting circuit comprises a receiving detecting circuit switch contact, an alarm device, and a photoresistor arranged opposite to the laser emitting circuit, the anti-theft rod is connected with a light blocking member located betweenthe laser emitting circuit and the photoresistor in a transmission mode, a light-transmitting holeis formed in the light blocking member,a movable sliding windowpushes the anti-theft rod in a jackingmode in the process of leftwards moving from a normal station to an anti-theft station to enable the anti-theft rod to rotate to be in joint with the receiving and detecting circuit switch contact, alaser of the laser transmitteris emitted to the photoresistor through the light-transmitting hole,and the light blocking memberis rest to block the laser in the process that the movable sliding windowmoves rightwards from the anti-theft station to the normal station.According to the anti-theft window, the problem thatin the prior art, the anti-theft window is inflated and deflated frequently dueto the need, and consequently operation is troublesome is solved.

The invention discloses a coordinate marking method of a straight line end point based on an XY coordinate system, the method comprising the following steps: S1, selecting a straight line, and obtaining the coordinates of a cursor point A when the straight line is selected; S2, determining two end points of the straight line, taking the end point closest to the point A as the mark point B, and taking the direction of the farthest point from the point A to the closest point from the point A in the two end points of the straight line as the vector C, wherein the direction of the farthest point from the point A to the closest point is the vector C; S3, judging the marking direction E and the marking content of the coordinates of the point B according to the included angle between the vector Cand the coordinate system; S4, determining the coordinate mark position G of the point B according to the determined mark direction E and the preset offset distance F; S5, obtaining the mark value Dof the point B according to the mark content, and placing the mark value D at the mark position G. The method solves the problems of complicated operation and error-prone existing in dimension markingon drawings at present, and provides a marking method which is simple in operation, convenient in use and accurate in marking.

The invention provides a content testing method of 3, 5-replacing oxazolidone compound, which uses high-efficient liquid-phase chromatogram containing ultraviolet detector to test. Testing wavelength of the ultraviolet detector is 200-400nm. The fixed phase of high-efficient liquid-phase chromatogram is reverse phase pole and mobile of it is intermixture of water and polar organic solution. The method is characterized that sample solvency has high speed and efficiency, components in analyzed sample are separated thoroughly, preparation of corresponding regent is simple, analyzing method is stable and adaptability is strong.

The invention belongs to the technical field of teaching aids for mathematics, and in particular relates to a metal hexahedron display Rubik's Cube, which comprises six square flat plates with the same structure and size assembled into a regular hexagon, and the front and right end faces of the square flat plates are provided with bumps at the central positions. Both ends of the bump are provided with a first hemispherical cavity, the outer surface of the bump is provided with a communication groove at the corresponding position of the first hemispherical cavity, the outer surface of the bump is provided with a passage groove at the inner end surface of the communication groove, and the projection is at the corresponding position of the passage groove A card slot is provided, a rubber ball is provided in the first hemispherical cavity, a rubber strip is provided in the rubber ball in the communication groove, a stopper is provided on both sides of the convex block on the rear end surface and the left end surface of the square plate, and the inner surface of the stopper is on the The corresponding position of the rubber ball is provided with a second hemispherical cavity. Its purpose is to solve the operation trouble caused by the existing hexahedron unfolding and restoration demonstration method, the demonstration is not intuitive enough, and the cut box can only be used as a one-time use item, which is not conducive to the establishment of students' environmental awareness.

The invention discloses a full-automatic fruit peeling machine and relates to the technical field of peeling devices. The full-automatic fruit peeling machine comprises a shell mechanism, a transmission mechanism and a knife mechanism, the shell mechanism comprises a barrel, a cover is arranged at the upper edge of the barrel in a hinged manner, the knife mechanism is mounted on the inner side of the cover, a barrel transmission mechanism is arranged in the barrel, and a fruit tray matched with the knife mechanism in use is arranged on the transmission mechanism. The full-automatic fruit peeling machine is suitable for peeling fruits different in type and shape and has the advantages of feasible structure, high practicability and easiness in popularization.

The invention relates to a spicy hot sauce production device, in particular to a batching apparatus for producing spicy hot sauce. The batching apparatus comprises a feeding pipe and a storage device, wherein a transport mechanism is arranged between the feeding pipe and the storage device; an electric gate valve is arranged at the end part of the feeding pipe; the transport mechanism comprises a hopper, a cantilever, a support, a motor and a rotating shaft, one end of the cantilever is hinged to the hopper, the rotating shaft is arranged at the top end of the support, the other end of the cantilever is hinged along the axis direction of the rotating shaft, a pressure sensor is arranged between the cantilever and the support, the pressure sensor is arranged at one side, corresponding to the feeding pipe, of a platform, and the pressure sensor is connected with the electric gate valve and the motor. The batching apparatus has the beneficial effects that the labor intensity of workers during production is alleviated, and the production quality is improved.

The invention provides a detection device for the permeation coefficient of pervious concrete. The detection device comprises a pervious cylinder, a measuring cylinder, a placement seat and a limitingassembly, wherein the placement seat is arranged beside the pervious cylinder, the bottom surface of the placement seat sinks to form an insertion hole for insertion of the measuring cylinder, and the limiting assembly is mounted at the joint between the placement seat and the pervious cylinder and is used for limiting the measuring cylinder from being automatically separated from the placement seat in the vertical direction. The detection device solves the problem that water is easily poured out after the measuring cylinder is collided because the measuring cylinder is arranged beside the pervious cylinder.

The invention discloses a novel efficient and energy-saving building wall convenient to clean. A deadening felt is arranged inside a wall body, a colorful elastic polyurethane waterproof coating layer is arranged on the right side of the deadening felt, the left side of the colorful elastic polyurethane waterproof coating layer is sprayed on the right side of the deadening felt, a thermosetting resin impregnated paper high-pressure laminated plate is arranged on the left side of the deadening felt, the right side of the thermosetting resin impregnated paper high-pressure laminated plate is fixedly connected to the left side of the deadening felt, polyurethane foam plastic is arranged on the left side of the thermosetting resin impregnated paper high-pressure laminated plate, and the right side of the polyurethane foam plastic is fixedly connected to the left side of the thermosetting resin impregnated paper high-pressure laminated plate. According to the novel efficient and energy-saving building wall, through cooperation of around rod, a transverse rod and a sliding block, the wall body is protected through the baffle, meanwhile, the baffle is detachable, dust is prevented from being attached to the wall body and being difficult to clean, and the problems that when an existing device works, the dust is generated on the surface of the wall body, cleaning is inconvenient are solved, and limitation does not exist.

According to a household energy storage system one-key starting system and a starting method thereof, disclosed by the invention, an electric signal obtained by a switching power supply is input to acontrol module by controlling a switch to be closed, and the control module generates a control signal and a control instruction according to the electric signal; the control signal is received by a first normally open switch, a second normally open switch and a fourth normally open switch, and the control instruction is received by a battery control system; the first normally open switch and thesecond normally open switch are closed according to the control signal, and the battery control system enables the normally open switch of the battery module to be closed according to the control instruction to make the battery module in an activated working state; the fourth normally open switch is closed according to the control signal to make the load in a power-on state; the battery module inthe activated state inputs the output electric signal into an inverter, and the inverter outputs the electric signal transmitted by the battery module in a direct current mode; and direct current output by the inverter is input into the control module through the first normally open switch in the closed state, and the control module keeps real-time output of the control signal and the control instruction after the control switch is switched off, so that the first normally open switch, the second normally open switch and the fourth normally open switch are kept in the closed state.

The invention provides a password authentication method, a password authentication device and a terminal, and solves the problem that remembering of a password is troublesome. The method comprises the steps of displaying at least one domino array on a screen, wherein the domino array is formed by arranging a plurality of slidable blocks in a domino way; receiving the operation information of the domino array, and triggering the blocks in the domino array to generate a domino effect; generating password authentication information according to the sliding information of the block in the domino effect; and verifying the password authentication information. A user does not need to remember either a path or a keyboard code, triggers the domino effect to generate the password authentication information after the blocks in the domino array are triggered, and then the password authentication information is verified, so that the problem that remembering of the password is troublesome can be solved.

The invention discloses a correcting system for online near-infrared detection on products through a packaging bag. The correcting system comprises a target detection component content correcting modeling unit and a target detection component correcting unit, wherein the target detection component content correcting modeling unit is used for establishing a target detection component content correcting model on the basis of a modeling sample; the target detection component correcting unit is connected with the target detection component content correcting modeling unit and is used for calculating a target detection component content of a to-be-detected sample on the basis of the target detection component content correcting model. The technical scheme is provided by the invention for solving the technical problem of test error caused by detection in the manner of separating the packaging bag when an online near-infrared instrument is used for quickly detecting large-scale products, so that the target detection component content of the to-be-detected sample outputted by the online near-infrared instrument can be prevented from being influenced by the error caused by the product package and the content can approach to the true value of the target detection component content of the to-be-detected product as far as possible.

The invention provides a hanging expansion rod structure and a pipe expansion machine with the same. The hanging expansion rod structure comprises an upper expansion rod fixing part, a lower expansionrod fixing part and a guide part; the upper expansion rod fixing part is provided with a first opening; the lower expansion rod fixing part is provided with a second opening; the upper expansion rodfixing part and the lower expansion rod fixing part are arranged at intervals; the guide part is arranged between the upper expansion rod fixing part and the lower expansion rod fixing part, and is provided with a third opening; the lower expansion rod fixing part is connected with the guide part; the upper expansion rod fixing part is movably arranged in the vertical direction; when the hanging expansion rod structure is in the hanging expansion rod state, the upper expansion rod fixing part is in contact with the guide part; and / or the upper expansion rod fixing part is connected with the guide part, the lower expansion rod fixing part is movably arranged in the vertical direction, and when the hanging expansion rod structure is in the hanging expansion rod state, the lower expansion rodfixing part is in contact with the guide part. The hanging expansion rod structure solves the problem of troublesome operation of a hanging expansion rod of a pipe expansion machine in the prior art.

The invention discloses a sewage treatment system. The sewage treatment system comprises a buffer pool, the buffer pool is connected to an agent feeding tank through a first pipe, the agent feeding tank is connected to a storage tank through a second pipe, the bottom of the buffer pool is provided with a sludge discharge pipe, an agent feeding mechanism is arranged above the agent feeding tank, asewage detector is disposed on the second pipe, the second pipe at the rear end of the sewage detector is provided with a liquid discharge pipe, the storage tank is connected to the agent feeding tankthrough a return pipe, the agent feeding mechanism comprises a telescopic rod, the telescopic rod is connected to a fixed ring through a connection rod, the fixed ring is provided with multiple spraypipes, and the downward bent part of the spray pipe is arranged above the agent feeding tank and a sewage tank. The sewage treatment system solves the problem that the existing sewage treatment method easily causes agent waste and excessive use.

The invention discloses a moon cake forming machine mold which comprises a forming support; a sleeve is assembled at the bottom end of the front portion of the forming support; a mold body is assembled on the upper surface of the sleeve; and a replacement mechanism is connected with the inner surface of the sleeve in a sleeved mode. According to the moon cake forming machine mold, a forming mold mechanism of a moon cake forming machine is arranged, and the forming mold mechanism is provided with the replacing mechanism facilitating mold core replacement and the forming support; and when a mold shell needs to be replaced, a displacement button is pulled rightwards, a sliding block moves in a sliding groove, a clamping jaw is driven to leave the right surface of an outer cover, then the outer cover is opened, then a lifter is lifted to the topmost end, the mold shell and a fixing buckle are pulled out from the inner surface of a limiting pipe, then the mold shell is moved forwards, the fixing buckle leaves the outer surface of a clamping button, and then the mold shell is convenient to replace, s that the replacement process is convenient and fast, and the problem that when mold cores with different patterns of an existing mold of the moon cake forming machine are replaced, the mold needs to be detached and replaced, and the operation process is troublesome.

The invention discloses a vapor-phase fluidized bed device for preparation and activation of a catalyst and a catalyst activation method. The vapor-phase fluidized bed device for the preparation and activation of the catalyst comprises a fluidized bed body, wherein the fluidized bed body comprises a reactor and a preheating pipe; the preheating pipe is used for preheating fluidized gas, a lower end port of the preheating pipe is inserted into the bottom part of the reactor from the top part, and the preheating pipe is provided with a flowing passage for the fluidized gas to flow from top to bottom and enter the bottom part of the reactor; the reactor is used for providing a fluidizing place for the fluidized gas to activate the particles of the catalyst. The vapor-phase fluidized bed device solves the problems of complicated oxygen-isolating transfer, collecting and operation of the catalyst in the existing fluidized bed device; difficulty in constant-temperature control of the reactor, and large loss of energy; large consumption amount of fluidized gas, large loss of catalyst, and the like.

The invention discloses an efficient automatic rotary hydraulic casting machining device which comprises a shell, a supporting column and a rotary hydraulic oil cylinder. A first sliding rod is arranged on the inner wall of a first sliding sleeve; the outer wall of the first sliding rod is slidably connected with the inner wall of the first sliding sleeve in a clamped mode; the back face of the first sliding rod is fixedly connected with the upper part of the front face of a square plate; two bent plates are arranged on the right side of a straight rod; the left sides of the two bent plates are attached to the right side of the outer wall of the straight rod; a first spring is arranged on the right side of the straight rod; the upper end and the lower end of the first spring are fixedly connected with the inner sides of the two bent plates correspondingly; and the outer sides of the two bent plates are rotatably connected with the right side of the front face of the square plate through pin shafts. According to the device, through cooperation of a motor, the square plate and a screw rod, a user changes the distance between clamps by controlling the rotary hydraulic oil cylinder, the problem that the distance between the clamps cannot be changed when an existing device works is solved, and limitation does not exist.

The invention relates to the technical field of measuring equipment, in particular to a multifunctional laser horizontal measuring instrument. Which comprises a placing frame, a base, a counterweight body, a controller, a rotating assembly, a rotating disc and a measuring instrument body, and is characterized in that firstly, the multifunctional laser horizontal measuring instrument is placed on the ground, the measuring instrument body is always kept vertical through the gravity influence of the counterweight body, and when the measuring direction of the measuring instrument body needs to be adjusted to be consistent with a measured object, the rotating assembly is started; when the measuring instrument is used, the rotating disc is driven to rotate on the base, the distance between the measuring instrument and a measured object is measured through the infrared distance measuring sensor, and the measuring direction of the measuring instrument body is consistent with that of the measured object until the measured distance is minimum, so that the measuring direction of the measuring instrument body can be automatically adjusted to be consistent with that of the measured object; manual adjustment is not needed, and operation is more convenient.

The invention relates to a preparation method of skimmin. The method comprises technical steps of: creeping dichondra complete herb is subjected to tissue breaking and extraction 3 times by using acetone; an extraction liquid is subjected to reduced-pressure concentration, such that an extraction paste is obtained; multi-stage countercurrent extraction is carried out by using an ethyl acetate-methanol mixed solvent with a ratio of 10:1; extraction liquids are combined; the solvent is subjected to reduced-pressure recovery; the obtained material is processed by using a polyamide resin column; an obtained elution liquid is concentrated, such that a crude product is obtained; the product is fed into a medium-pressure chromatography column with silica gel of 200-300 meshes; a methanol-dichloromethane mixed solvent system is adopted; elution liquids at target component fragments are collected; the elution liquid is filtered and concentrated, and is subjected to low-temperature drying, such that skimmin is obtained. The skimmin preparation method provided by the invention has the advantages of high product purity and suitability for industrialized enlargement.