1190 results about "Measuring ruler" patented technology

The invention relates to a geologic field information collection system. The collection system is designed by adopting a platform-based concept and integrates a project management module, a GPS (global positioning system) module, a geologic compass module, an image system module and a character system module, collection is performed by dividing geologic field sources into points, lines and planes, and information of geologic medium sources like geologic points, fault points, hydrologic points, drill holes, fractures, measured formation sections and pits is output in the form of geologic field information collection card module pieces and Excel data files respectively, so that requirements on filing of original data are met, direct utilization of geologic field information is realized, and integration of outdoor work and indoor work is realized. The collection system comprises a system function module, a geologic field information collection card module and a data output module. By the system, the geologic field information can be collected quickly and accurately; efficiency of field work and data accuracy are improved by providing functions of quick GPS positioning, a measuring ruler, an angulometer, a geologic compass and the like.

The invention provides a center-free arc bending radius measuring ruler and a bend pipe bending radius measuring method. The measuring ruler is respectively connected with a left supporting leg and a right supporting leg symmetrically at both ends of a cross beam; an extension rule is connected at the center of the cross beam; and the extension rule moves up and down along the vertical direction of the cross beam. The measuring method comprises the following steps of: firstly equally dividing the inner arc or outer arc of a bend pipe bending part into a plurality of parts; then respectively measuring the arc heights of partial arc segments by taking each equal diversion point as a beginning point in two directions of the inner arc or outer arc by adopting the center-free arc bending radius measuring ruler; then obtaining the radius of each partial arc segment through calculation; and finally calculating the average value of the radius of each partial arc segment so as to calculate a bend pipe bending radius. The tool has the characteristics of being simple to manufacture, simple to measure, easy to grasp and the like; the position of the circle center of a workpiece is not required to be found out; manual measurement can be carried out; the measuring ruler is convenient to observe and monitor; and the bend pipe bending radius can be measured under any condition of the workpiece.

The invention relates to a cutting device, in particular to an automatic measuring and cutting device of a board. The automatic measuring and cutting device of the board comprises a device supportingframe, a cutting supporting frame, a measuring mechanism, a power mechanism I, a pushing mechanism, a stop mechanism, a power mechanism II and a cutting mechanism, and the two ends of the measuring mechanism are correspondingly and slidably connected to two measuring rulers to measure the board placed between two supporting plates I, the board placed between the two supporting plates I are pushedto move through the pushing mechanism, when a specified distance measured by board movement is measured, the measuring mechanism can push the stop mechanism to move, the stop mechanism cuts off poweron the power mechanism I, and the pushing mechanism does not move, the board moves to a specified length, and the specified length of the board is subjected to stamping and cutting through the cuttingmechanism, a pressing mechanism clamps the board when the cutting is carried out, and no jitter generating when the cutting is carried out can be ensured, and the cutting accuracy is ensured.

The invention relates to continuous, real-time and automatic measuring method and device of diameter at breast height of a tree. The device comprises a rack and a digital plate which is fixedly arranged on the tree. The measuring rack is arranged on the tree in a position where the circumference of the tree can be measured, and the rack can be extended along with the circumference of the measured object and further can be reduced along with the circumference of the measured object; a measuring ruler main body is made from a material which is substantially free of plastic deformation; the teeth of the rack are flexible teeth, and the rack is arranged on the tree in a position where the diameter at breast height of the tree is measured and surrounds the tree; one end of the rack is fixed while the other end is floating; a plurality of racks which are enough in length and are in a suspended state are arranged at the floating end; the digital plate is provided with a counting gear and the moving length of the rack is calculated by virtue of the number of teeth of the counting gear, so that the change of the diameter at breast height of the tree is calculated; the digital plate is provided with two conductive slide rails which are in intermittent concentric ring structures and contacts of conductive wafers are in contact with the conductive slide rails.

The invention discloses a liquid-state silicon gel injection forming machine, which comprises a straight press type injection gun barrel, a static mixer, a proportional pump and a gel pump cylinder, wherein the straight press type injection gun barrel comprises an injection oil cylinder, an electronic ruler, a material containing gun barrel, an injection valve and an injection nozzle, the gel pumping cylinder comprises a press disc, a lower pump tube, an upper pump tube and a pull rod, a color paste pump comprises an injection air cylinder, a color paste injection tube, a reverser, a color paste tube and a measuring ruler, a gel outlet opening of the gel pumping cylinder is connected with a gel inlet opening of the proportional pump through a rubber pipe, the proportional pump comprises two proportional tubes: a proportional tube A and a proportional tube B, the two proportional tubes A and B are connected with a mixing pipe through the ruber tube, the mixing pipe is connected with the material containing gun barrel through a one-way valve, and a color paste output opening of the color paste pump is connected with the mixing pipe through a copper pipe. When the straight press type injection gun barrel of the invention is adopted, the cost is low, residual gel is not easy to be attached to the inner wall of the gun barrel, the structure is simple, and the cleaning is convenient. The proportional pump and the color paste pump are adopted, the accuracy of the material addition is high, and in addition, the invention can be applicable to the injection forming of various kinds of liquid-state silicon gel with different viscosities.

The invention relates to a circular arc radius measuring ruler, and discloses a measuring implement for measuring the internal radius and the external radius of a circular arc or a circle. The circular arc radius measuring ruler is formed by a main ruler, a sagging guide slot rocker, a cylindrical contact and a vernier, wherein a guide slot in the sagging guide slot rocker is formed in the perpendicular equally-dividing line of the sagging guide slot rocker. According to the generally acknowledged truth that three points which are not located on the same straight line can solely determine one circle, the circle center of the circle is located at an intersection point of the perpendicular equally-dividing line of a connecting line of any two points, the circle center of the measured circular arc can be determined, and the radii of the internal circular arc face and the external circular arc face are read through scales of the main ruler. The aim of infinitely measuring the internal radius and the external radius of the circular arc with the circular arc central angle smaller than 180 degrees is achieved, the measuring accuracy is high, the technical requirements for measuring persons are low, the operation process is simple, and the circular arc radius measuring ruler is easy to carry, low in cost and small in investment.

The invention discloses an on-site tunnel real-time surrounding rock classification system and a method. The system includes a bearing platform, the bearing platform bears a measuring ruler, a point load tester for conducting point load test on an on-site surrounding rock sample, and a geological compass for determining weak structural plane occurrence, the measuring ruler, the point load tester and the geological compass are detachably disposed on the bearing platform, and the lower part of the bearing platform is provided with moving components for driving the bearing platform to move. The setting of the whole system is convenient for moving a measurement component to the site for real-time measurement, realizes real-time classification work of tunnel surrounding rock, effectively improves the efficiency of tunnel surrounding rock classification work, improves the flexibility of classification work, and can acquire real-time feedback of rock mass classification near a tunnel face, thus being convenient for directly carrying out follow-up work.

The invention discloses a borehole peering detection method with a precise positioning function, and a borehole peering propelling device thereof. The borehole peering detection method is conducted through a bore peering system and mainly comprises the steps that a plurality of concentric circles at equal distances are arranged on a display screen of a borehole television mainframe to serve as a measuring ruler, and a camera probe of the borehole peering system is mounted on a device body with a telescopic tripod; the bottom end of the device body is connected to a push rod through a thread, acable of the borehole television mainframe penetrates through a hollow core of the push rod, and a data line of the camera probe is connected with the borehole television mainframe through the cable;propelling is conducted towards the interior of a borehole, and fracture detection is conducted; the borehole television mainframe collects and records a borehole inner wall image displayed on the measuring ruler; and the changing situation of fracture data detected for multiple times is analyzed, accordingly, the evolutionary process and the development tendency of a fracture are obtained, the accurate basis is provided for calculating the rock stratum displacement trend, and actual design and construction of rock mass engineering are directed.

The invention discloses a spirit level for power transmission line n-shaped rod construction. The spirit level for power transmission line n-shaped rod construction comprises a span measuring ruler used for measuring the horizontal distance between two rod pits of an n-shaped rod and two depth measuring rulers arranged on the end portions of the span measuring ruler respectively. The span measuring ruler comprises a ruler sleeve and a telescopic ruler core sleeved inside the ruler sleeve. The outer surface of the ruler core is provided with a scale. A level gauge is arranged on the outer surface of the ruler sleeve. The depth measuring ruler comprises a lower ruler and a telescopic upper ruler sleeved inside the lower ruler. The outer surface of the upper ruler is provided with a scale. The spirit level for power transmission line n-shaped rod construction is convenient to use and capable of directly measuring the horizontal distance between the two rod pits and the perpendicular distance between the bottom faces of the two rod pits, offering instructive parameters for n-shaped rod construction, omitting a large number of calculation processes and improving the construction efficiency to a large extent. In addition, the spirit level for power transmission line n-shaped rod construction further has the advantages of being small in error, easy to transport and store and the like.

The invention discloses a high-precision ceramic ferrule coaxiality detector. The detector comprises a measuring platform mechanism, an optical fiber light source and an image measuring system, wherein the measuring platform mechanism comprises a bottom plate, a three-dimensional translation platform, a workpiece support, a microscope tube and a high-resolution CCD (charge coupled device) camera, both the three-dimensional translation platform and the workpiece support are mounted on the bottom plate, the microscope tube is mounted on the three-dimensional translation platform, the high-resolution CCD camera is arranged at one end of the microscope tube, a lens matched with the workpiece support is arranged at the other end of the microscope tube, the workpiece support is provided with an optical fiber seat, and the optical fiber seat is connected with the optical fiber light source through optical fibers; the image measuring system comprises an image acquiring and data processing unit, a high-definition display as well as a measuring ruler mounted on the high-definition display, and the image acquiring and data processing unit is connected with the high-resolution CCD camera and the high-definition display respectively. The detector is simple and reasonable in structure, convenient to operate, higher in measuring precision and lower in manufacturing cost.

The invention discloses an occlusion depth gauge, which comprises a positioning cylinder and a measuring ruler inserted in the positioning cylinder and moving along the axial and guiding direction. The left section of the measuring ruler is a scale section and the right end part is provided with an ejection push part; a one-way locking mechanism which can prevent the measuring ruler from retreating to the right when the measuring ruler moves to the left is arranged between the positioning cylinder and the measuring ruler; the mechanism comprises a ratch arranged on the measuring ruler and along the length direction of the measuring ruler and a one-way lock locked and matched with the ratch in a one-way mode; the one-way lock is a pawl hinged inside the positioning cylinder; the hinged shaft of the pawl is sleeved with a torsion spring; and the end part, far away from the pawl part of the pawl, is an unlocking force-applying part. The structure of the entire gauge is simple, the measurement mode is convenient and quick, the measuring efficiency is high, labor intensity of workers can be reduced to a large degree, and more importantly, through one-way locking and matching between the one-way lock and the ratch, the movement amount of the measuring ruler can be ensured to be not influenced by other factors during the process during which a static contact pushes the measuring ruler to move, and the measuring precision is high.

The invention discloses a laser and video infused automatic railway snow depth multi-point measuring device and method. The device comprises a laser snow depth sensor, a pan-tilt, a support, a first fixing frame, a second fixing frame, a data processing platform, a terminal computer, a snow measuring ruler, a ground reference plate, a tilt angle sensor and a network camera. The data processing platform comprises a data processing unit and a 3G router. A 3G mobile data communication platform is adopted for the 3G router. The laser snow depth sensor is fixedly arranged on the pan-tilt and rotates along with pitching and rotating of the pan-tile, output signals are collected and processed through the data processing platform and are transmitted to the terminal computer through a communication unit. By means of the laser and video infused automatic railway snow depth multi-point measuring device and method, automatic multi-point snow depth measuring can be achieved, video recording is introduced to shoot images of the snow measuring ruler and the ground snow accumulation situation, the measuring accuracy of the laser snow depth sensor is verified, meanwhile, the ground snow accumulation image contour is recognized, and the snow accumulation distribution condition of the surrounding ground is estimated. The video infused automatic railway snow depth multi-point measuring device and method are high in measuring accuracy, good in stability, high in timeliness and convenient to use.

A method for positioning intersecting mouth space of a pipe truss secondary rod is for determining the position of a secondary rod on a main rod. The method, a three-point positioning method, comprises the following steps: a design software is utilized to build a three-dimensional solid model of a steel pipe truss, boolean operations are then done at nodes of each of the built models of the main and the secondary rods, an intersecting line trajectory is left, and three random feature points are determined on the intersecting line trajectory; and relative size positions of the three feature points determined in last step are marked one by one, relative coordinates of the three feature points are directly lofted and plotted on the main rod by means of a measuring ruler, and the secondary rods can be positioned and assembled according to the contour. Via the three feature points, the method can determine the position of the secondary rod on the main rod quickly and relatively precisely. Through computer lofting and entity lofting processes, the method not only satisfies basic precision requirements of steel structure positioning, but also reduces time needed for lofting and rod positioning, and thus improves work efficiency.

The invention provides a handheld dynamic light wave diffraction demonstration instrument. The handheld dynamic light wave diffraction demonstration instrument comprises an organic glass tube A and an organic glass tube B which are mutually and rotatably connected in a sleeved mode, and further comprises a power pack, a green laser, a red laser, an adjustable slit device, an optical grating location slot, a measuring ruler, a main switch, a red light switch and a green light switch. Two pairs of holes are respectively formed in the sleeved connection position of the organic glass tube A and the organic glass tube B, the two pairs of holes are symmetrically formed, the axis of the two pairs of holes is parallel to the slit direction of the adjustable slit device, and the two ends of an instrument support are inserted into the holes. The measuring ruler is arranged on one side of the organic glass tube B, and light beams of the green laser and light beams of the red laser are projected to the measuring ruler. The handheld dynamic light wave diffraction demonstration instrument has the advantages of being small and exquisite in size, convenient to carry, capable of being used for classroom teaching directly, and convenient and flexible to use due to the fact that a dark area in a classroom can be chosen as the background to conduct demonstration, quantitative measurement can also be achieved, and the measuring ruler can be directly attached to a blackboard through build-in magnetism conveniently.

The invention discloses a multi-position base plate delaminating monitor and a using method thereof. A plurality of extending pipes in the horizontal direction are mainly connected to the top of a base body sleeve of the traditional monitor; each extending pipe is provided with an upward observing seam; a measuring ruler is installed in each extending pipe, and the indication of the measuring rulers can be viewed from the observing seams; each measuring ruler is connected with respective anchor head by a pull rope; and each pull rope is movably connected to each measuring ruler by a screw, and the pull ropes respectively have different lengths in a drilling hole. When the multi-position base plate delaminating monitor is used, the delaminating condition of a base plate stratum is judged according to the displacement change of two upper and lower adjacent measuring points. The invention provides base plate delaminating data for the safety production of a coal mine, is convenient for a staff to adopt a safety measure in time, and prevents accident generation.

The invention discloses a steam sealing gap measuring ruler, which comprises a measuring rod, a dial indicator and a measuring head, wherein the dial indicator is positioned at the upper end of the measuring rod; the measuring head is positioned at the lower end of the measuring rod; a through hole is formed in the measuring rod; a thread sleeve is arranged on the upper part of the through hole; a measuring needle is arranged in the thread sleeve; the top of the measuring needle is connected with the dial indicator; a spring is sleeved outside the middle part of the measuring needle; the top of the spring is fixedly connected with the thread sleeve; the tail end of the spring is connected with a tightening force sleeve; and the tightening force sleeve is fixed on the measuring needle. By the technical scheme, a whole circle of sealing radial gap is quantitatively measured by using the steam sealing gap measuring ruler, an actual gap value of the sealing radial gap is read, and purposive and targeted scraping is carried out. A construction method has a relatively low requirement on professional skills of a constructor, so even if the constructor is a new employee, the constructor can well master the construction method soon after being trained and make a qualified sealing radial gap.

The invention discloses an automatic online steel rail straightness measuring instrument. The automatic online steel rail straightness measuring instrument comprises a machine frame. A measuring ruler frame is arranged on the machine frame. A longitudinally-moving measurement trolley is arranged on the measuring ruler frame. A measuring mechanism used for measuring the steel rail straightness is arranged on the measuring trolley. A plurality of parallel slide rails which are transversely arranged are arranged on the machine frame. A transversely-moving beam arranged in the longitudinal direction is arranged on the slide rails and is connected with the slide rails in a sliding mode. A transversely-moving mechanism for making the transversely-moving beam transversely move on the slide rails is arranged on the machine frame. Automatic lifting mechanisms for making the measuring ruler frame do vertical movement are arranged at the two ends of the transversely-moving beam. The automatic online steel rail straightness measuring instrument has the advantages that the surface curves of the top face and the side face of a steel rail can be measured at the same time, accuracy is high, and operation is easy and convenient.

The invention relates to an external ruler for spine trunk, which is characterized in that two parallel vertical slideways are symmetrically connected with the two sides of a vertical central line along the top of a frame; a size column is arranged on the top surface of the ruler; sliding grooves at the two ends of the vertical slideways are respectively provided with a sliding thickness-measuring ruler with an upper spinous process and a lower spinous process; a spine benchmark rod is articulated between bottom ends of the two sliding thickness-measuring rulers; the benchmark rod is connected with a vernier for measuring the distance which the spine departs from central line; vertical sliding devices are installed in the vertical sliding grooves, the two sides of the vertical sliding devices are symmetrically connected with two parallel horizontal slideways and a transfiguration ruler which can slide in the sliding grooves for measurement is symmetrically installed in the horizontal sliding groove at each side; size columns marked with measurement standards are distributed on the top surface of the two parallel horizontal slideways. The external ruler has the advantages of reasonable design, compact structure, being simple and practical, precise measurement, wide measuring range, small size, being light, being convenient for conveying and moving, low cost, safe operation and convenient use, etc., wherein, measured data can be used as bases for clinical treatments and for verifying treating effect.

The invention discloses a shield / TBM hob wear measuring device and a measuring method thereof. The measuring device comprises a frame body, a fastening assembly and a mobile measurement assembly. The frame body comprises a crossbeam, a fixed strut and an adjustable strut respectively arranged at two ends of the crossbeam and vertically connected with the crossbeam. The fastening assembly comprises a movable leg movably connected with the adjustable strut and a fastening bolt arranged at the lower end of the movable leg. The mobile measurement assembly includes a measuring head, a horizontal guide rail for moving the measuring head, and a vertical guide rail. The fixed end of the horizontal guide rail and the upper end of the vertical guide rail are provided with a displacement sensor respectively. The measuring device of the invention has the advantages of convenient use, high measuring precision and high efficiency, avoids the reading error of the staff compared with the measuring ruler, and can acquire the horizontal and vertical position information of the abrading and further obtain the comprehensive cross section information of the hobbing ring after wear. Through the data post-processing, it is be achieved hob two-dimensional cross-section image reproduction after wear, in order to accurately determine the hob wear category.

The invention relates to the field of measurement, in particular to a measuring tool for landscaping. The measuring tool comprises a protractor body and two extensible measuring rulers. One end of each measuring ruler is hinged to the center point of the protractor body, and the other end of each measuring ruler is extensible. When a nursery stock is perpendicular to the ground, the measuring toolis put at a position, near to the bottom end of the nursery stock, of the ground; one of the measuring rulers is located on the 0-degree or 180-degree scale line of the protractor body, and the otherend of the measuring ruler is extended to the bottom end of the nursery stock; the horizontal distance from the location of the measuring tool to the bottom end of the nursery stock is acquired fromthe scale on the measuring ruler; the other end of the other measuring ruler is extended to the top end of the nursery stock; at the moment, the included angle theta, between the two measuring rulers,on the protractor body is acquired; the height of the nursery stock is calculated through the horizontal distance between the location of the measuring tool to the bottom end of the nursery stock aswell as the theta. The measuring tool is simple in structure and low in cost, and a measuring method is simple to operate and accurate in measurement.

The nanometer measuring tape comprises a light source, a probe and a target mirror. The light source uses a frequency-stabilized dual-frequency helium-neon laser; the outputted frequency difference of said dual-frequency laser can to continuously tuned from 1MHz to hundreds MHz; when the target mirror or the measured object moves each 1 / 8 optical wavelength along with the surface of the measured target, the polarization state of light outputted from the light source varies once. In the range of one cycle from the traceable source to the natural reference, four different polarization states are sequentially appeared, which are parallel ray independent oscillation, parallel ray and vertical ray commonly oscillation, vertical ray independent oscillation and non oscillation; based on the four different polarization states, estimating the bias size and direction of the measured object.

A combination fishing net and weight scale device with optional length measuring ruler. The device includes a weight measuring scale incorporated into the handle of the fishing net at a point less exposed to water during standard use of the net. The weight scale components are incorporated at a distal end of the handle opposite the end incorporating the net basket. To use the weight scale the fish is retained in the net basket and the distal end of the handle is held up to allow the major portion of the handle and the fishing net basket to extend under gravity below the point of hanging support. In this manner, the weight of the fish within the fishing net basket is shown on an indicator positioned in the end (movable) component of the handle that shows through an aligned aperture on the main (fixed) handle component. The movable end component of the handle moves telescopically with respect to the fixed handle component. The weight measuring assembly preferably incorporates an internally fixed spring extending between the movable component and the fixed component of the handle. Alternately, a solid state electronic scale could be incorporated into the handle in the same position. A length measuring device in the form of imprinted or engraved markings along the length of the handle may optionally be incorporated so as to provide a readily available means for measuring the length of the fish. The length scale would preferably extend from the point of attachment between the handle of the fishing net and the circular basket section such that the fish might be retained within the net basket and flipped over to extend along the handle for measurement.

The invention discloses a rotary excavating pile sediment thickness measurer. The lower end of a lifting rope is fixed to a lifting lug; the upper end of a measuring ruler is fixed to the center of a bottom surface of a balancing weight, the lower end of the measuring ruler is a tip end, and a top surface of the tip end is a flat surface; a side face of the measuring ruler is provided with measuring scales along a length direction from the lower end to the upper end, each scale value of the measuring scales is 5mm, the bottom of the tip end corresponds to the ''zero'' point of the measuring scales, and the scale value of the upper end of the measuring scales is larger than 50cm; and one end face of the measuring ruler is provided with a set of sawteeth along the length direction which extend from the upper end of the tip end to the upper end of the measuring ruler. The rotary excavating pile sediment thickness measurer provided by the invention can measure the sediment thickness of each position, and can automatically measure a maximum sediment thickness, the measurement accuracy is high, measurement is simple, convenient and rapid, and the measurement efficiency is substantially improved.

The invention relates to the field of dimension measuring instruments, in particular to an error detecting tool for a dimension of a circumferential hole position. An error detecting tool for a dimension of a circumferential hole position includes a central shaft, on which a reference measuring component and a movement measuring component are disposed, wherein the reference measuring component isfixedly disposed on the central shaft, the movement measuring component can rotate relative to the central shaft, the reference measuring component includes a reference angle disk sleeved on the central shaft and a radially extending reference measuring ruler, the movement measuring component includes a movement angle disk sleeved on the central shaft and a radially extending movement measuring ruler, the movement angle disk and the movement measuring ruler synchronously move, the reference angle disk is provided with a large scale, the movement angle disk is provided with a small scale, and the reference angle disk and the movement angle disk are matched to measure angles. The problem that the measuring device existing in the prior art is large in volume and low in measuring accuracy is solved.

The invention belongs to the machining inspection and precision measurement field and relates to a part surface hole position size detection tool. The part surface hole position size detection tool includes a diameter ruler, a measuring assembly and a positioning assembly; a fixing base is fixed onto one end of the diameter ruler; the other end of the diameter ruler is slidingly sleeved with a movable base; the diameter ruler is slidingly provided with a main vernier; the measuring assembly is fixed onto the bottom of the main vernier; the measuring assembly comprises an angle scale, an anglemeasuring dial and an auxiliary measuring ruler; the angle scale is fixed on the main vernier; the angle measuring dial is rotationally arranged on the angle scale; the auxiliary measuring ruler is fixed onto the angle measuring dial; the auxiliary measuring ruler is perpendicular to the axis of the angle scale; the auxiliary measuring ruler is slidingly provided with an auxiliary vernier; the positioning assembly is fixed onto the bottom of the auxiliary vernier; the positioning assembly includes a positioning rod of which one end is arranged on the auxiliary vernier; the positioning rod is provided with a plurality of measuring rods; the plurality of measuring rods form an umbrella-shaped structure which can be folded towards a measuring plane; and the positioning rod is parallel to theaxis of the angle scale.

The invention discloses a measuring ruler used for engineering surveying and mapping, and belongs to the technical field of measuring devices. The measuring ruler used for engineering surveying and mapping includes a first main ruler, a second main ruler and a moving ruler. A first graduation line is arranged at an edge of the first main ruler. A first level ruler is mounted on the first main ruler in an embedded manner. A slender measuring tape is fixedly connected with one end of the first main ruler. Certain objects with longer length or higher height can be measured by utilizing the slender measuring tape. One surface of an outer side of the slender measure tape is fixedly connected with a compass, and the other surface is fixedly connected with a threaded pipe. A device body is enabled to have a function of indicating a direction by utilizing the compass. A vertical line hammer is arranged inside the threaded pipe. A placement slot is arranged in the middle of the first main ruler. The second main ruler is arranged inside the placement slot. A connection hole is arranged at a bottom end of the second main ruler. The inside of the connection hole is fixedly connected with a rotating shaft. The rotating shaft is connected with the first main ruler in a moving manner.

The invention proposes a gap measurement tool and a gap qualified rate measurement method, which are well adapted to the batch-production internal and external decorations of a cab of a heavy truck. The measurement tool is a measuring ruler with a trapezoid structure. The surface of the measuring ruler is marked with standard scale, a gap lower limit deviation graduated line and a gap upper limit deviation graduated line. The measurement method can achieve the quick, convenient and accurate measurement of the gaps of the batch-production internal and external decorations of the cab of the heavy truck at lower cost through a simple structure, and can accurately determine at the highest efficiency whether the gaps of the internal and external decorations of the cab are qualified or not, greatly improves the detection efficiency of the internal and external decorations of the cab, and reduces the cost. Meanwhile, the measurement tool and the measurement method can be widely popularized and applied to the measurement of gaps of other products besides the internal and external decorations of the cab, and are good in market popularization and application prospect.

The invention relates to a method and a device for measuring the pitch diameter of an external thread, and belongs to the technical field of analysis and measurement control. The method comprises the steps of selecting three pins, measuring the three-pin value and calculating the pitch diameter of an external thread. A fixed bracket is fixedly connected with a base. The base is provided with a slide slot, and a mobile bracket is in sliding connection with the slide slot through a guide rib. The base is further provided with a guide slot. The top ends of the fixed bracket and the mobile bracket are each provided with a placement slot, and the directions of the placement slots are consistent with the axis of the fixed bracket. Adjusting seats are respectively provided with an avoiding slot in the bottom, and the adjusting seats are connected with the base through screws and disposed at the two sides of the fixed bracket. A circular magnetic sheet is attached to a side, near the fixed bracket, of each adjusting seat. A measuring scale bracket is fixedly connected with the base. The measuring ruler bracket is provided with a scale insertion slot in which a measuring scale is inserted. The advantages are as follows: the measuring method is simple; the measuring device has the characteristics of small size, low cost, novel structure, flexible operation and high universality; and the measuring accuracy and work efficiency are improved.

The invention relates to a measuring instrument, in particular to a measuring structure for a large opening distance of a cervix. The measuring structure for the large opening distance of the cervix comprises two measuring pieces and a measuring ruler located between the two measuring pieces, one end of the measuring ruler is fixed to one of the measuring pieces, and the other end of the measuring ruler is movably fixed to the other measuring piece. The measuring structure for the large opening distance of the cervix can conveniently and rapidly measure the large opening distance of the cervix and is free from the influence of external conditions, measurement is accurate, and damage to cervical tissue is small.

The invention discloses a device and a method for hydraulic structure deformation distribution type optical fiber monitoring. The device comprises a through-bottom vertical shaft, wherein a displacement platform is arranged in the through-bottom vertical shaft, drill bit driving devices are arranged at the two sides of the displacement platform, are connected with conical drill bits, and are respectively connected with lifting ropes, the lifting ropes are wound around coiling discs, the middle part of the displacement platform is connected with one end of each of a pair of springs, the other end of each of the pair of springs is hinged to a vertical measuring ruler, the vertical measuring ruler penetrates through a scale platform, an optical fiber hanging bucket is arranged between the two springs, a wavy loop optical fiber is arranged in the optical fiber hanging bucket, an optical fiber buckle is arranged on the wavy loop optical fiber, an optical wave transmitter is arranged at the input end of the wavy loop optical fiber, and an optical wave collector is arranged at the output end of the wavy loop optical fiber. The device has the advantages and characteristics that the repeated use is realized, the installation is very convenient, the real-time detection and maintenance are realized, the distributed type structure is realized, the micro and macro effect and real-time effect are realized, the suitability to complex environment is high, and the like.