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113 results about "Level staff" patented technology
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A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. It cannot be used without a leveling instrument.
Levelling Rod, Level Determining Apparatus for Said Rod, and Level Determining Method
The levelling rod (1) for a level determining apparatus (2) has position indications therealong along expressed by barcode symbols (11, 12). At least some of said barcode symbols are colour barcode symbols, the colour serving to encode said position indications. The barcode symbols can be organized in first and second blocks (12, 11) of barcode symbols, each providing a position indication, wherein the length (Ls) occupied along the rod (1) by a first block (12) is smaller than the length (Lb) occupied along the rod by a second block (11), the first blocks thereby providing a finer position indication than the second blocks. The first blocks (12) of barcode symbols can be formed of monochrome and colour bar code symbols, e.g. just one colour barcode symbol and at least one monochrome barcode symbol, while the second blocks (11) can be formed purely of colour barcode symbols. The invention also relates to a level determining apparatus specifically adapted for the above rod, and to a method of using that rod.
Owner:LEICA GEOSYSTEMS AG
Digital level capable of automatically measuring
InactiveCN101666642ABest focus positionReduce measurement errorHeight/levelling measurementLevel staffHandling system
The invention relates to a digital level capable of automatically tracking a level rod and automatically completing measurement, comprising a wide-angle camera processing system, a telescope focusingsystem, a CCD device and a CPU unit, wherein the wide-angle camera processing system is used for finding a scale in all around under the driving of a horizontal rotating base, and then calculating theorientation and distance of the scale; the telescope focusing system is used for adjusting the direction thereof to automatically focus after aligning the scale according to the orientation and distance of the scale; the CCD device is used for acquiring precise images of the scale by the telescope focusing system after focusing; and the CPU unit is used for controlling the horizontal rotating base to rotate by a corresponding angle according to the orientation and distance of the scale so as to lead the telescope focusing system to align the scale, then driving the telescopic focusing systemto corresponding focal distance, acquiring the image forming the scale in the CCD device, finally calculating the height and distance of the scale and storing the height and distance in a memory.
Owner:CHANGZHOU XINRUIDE INSTR
Motorway soft soil roadbed settlement observation cable device
ActiveCN103487022AWith flexible featuresSolve the fragileHeight/levelling measurementLevel staffEngineering
The invention relates to a motorway soft soil roadbed settlement observation cable device which mainly comprises a settlement plate, a flexible observation cable, a settlement ruler, a balance level and a leveling rod, wherein the balance level and the leveling rod are used for observation. The settlement plate is connected with the settlement ruler through the flexible observation cable. The balance level is arranged between the settlement ruler and the leveling rod and used for measuring and reading scales on the settlement ruler and calculating the foundation settlement quantity of the position of the settlement plate. The motorway soft soil roadbed settlement observation cable device is simple in structure and convenient to use. The observation cable has the specific flexible character so that a rolling machine can directly roll over the observation cable when an embankment is filled. The problem that a traditional rigid measuring rod observation device is prone to damage in construction is solved. Meanwhile, repeated filling and digging of the road surface near a measuring rod is reduced. The sufficiently-long flexible observation cable can be directly cut out, the part, exposed out of the road surface, of the observation cable is directly coiled in situ, welding is not needed and construction difficulty and work loads are reduced. The motorway soft soil roadbed settlement observation cable device is low in manufacturing cost and capable of obviously saving monitoring cost.
Owner:HOHAI UNIV
Measurement method for measuring elevation and flatness of concrete surface
InactiveCN104280014AGet 3D coordinates in real timeMeasure vertical distance in real timeHeight/levelling measurementGeomorphologyLevel staff
The invention discloses a measurement method for measuring the elevation and flatness of a concrete surface. The method comprises the following steps: freely setting up a station by using a total station, thereby obtaining a three-dimensional coordinate of the set station; performing real-time tracking measurement on a prism on a measurement frame, and acquiring a three-dimensional coordinate of a central point of the prism on the measurement frame; by utilizing an ultrasonic measurement element mounted on the measurement frame, acquiring the actual three-dimensional coordinates of any position of the concrete surface, wherein the three-dimensional coordinates comprise plane coordinates and elevation of a certain position on a to-be-detected concrete surface; transmitting the data observed by the total station in real time and the data measured by ultrasonic waves to a data computer in real time; and realizing batch computing of the measured design plane coordinates and elevation of the concrete surface. The problems that elevation measurement difficulty is caused and whether the flatness on the concrete top surface meets the standard inspection requirement cannot be detected in the construction process in real time because a leveling rod is inconveniently directly arranged on the concrete surface in the concrete construction process in a leveling method are solved, and the method disclosed by the invention has the characteristics of rapidness, accuracy, intelligence and high efficiency. Moreover, the construction quality is guaranteed, and the working efficiency is improved.
Owner:THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
Digital levelling system, method, composite coding levelling staff and production method thereof
ActiveCN102829757ASimple structureLow production precision requirementsHeight/levelling measurementIndiumImage resolution
The invention relates to a digital levelling system, a method, a composite coding levelling staff and a production method thereof. The composite coding levelling staff is provided with a fine coding area and a reading area on the surface thereof, wherein the fine coding area is provided with indicating circles with equal interval and same size and arranged in single row, and locations of the centers of the indicating circles to the bottom of the levelling staff can be calculated from the reading area arranged correspondingly. According to invention, the above arrangement is simple in structure and easy to realize. During the production technology, by using a template duplicating form to produce the composite coding levelling staff, each levelling staff has a high degree of consistency, so that a high-precision reading can be ensured by calibrating the template with high precision and correcting with a mathematics model, and production technology is simplified and cost is reduced at the same time. The instrument system can meet levelling standards of national first and second grades. A high-precision indium steel rule uses an indium steel band as a base steel, and can achieve a resolution of 0.01 mm through cooperating with a high-resolution area array CCD, thereby greatly improving measure precision.
Owner:HENAN DERUIPU SURVEYING & MAPPING INSTR CO LTD
Leveling rod for measuring subsidence of ground with large surface relief and use method thereof
The invention discloses a leveling rod for measuring subsidence of ground with large surface relief. The leveling rod comprises a rod body including three or more segments of telescopically cooperated sub-rods, wherein the width of each sub-rod decreases gradually from bottom to top; two adjacent sub-rods are fastened together through a fastener device arranged at the upper end of the lower sub-rod; a level gage is arranged on the bottommost sub-rod. The invention also discloses the use method of the leveling rod. The use method comprises three steps of length adjustment, vertical state adjustment, and resetting. The leveling rod provided by the invention is adaptable to surface measurement with large surface relief; the sub-rod becomes thinner and lighter from bottom to top, so that the sub-rod is effort-saving in erection; the leveling rod is convenient to hold and use by arranging a handle; every two sub-rods are fastened with a fastening screw to effectively slippage between the sub-rods, thereby improving the measurement accuracy.
Owner:SHANDONG UNIV
Portable leveling rod support
InactiveCN102853818AReduce labor intensityHigh measurement accuracyIncline measurementObservational errorBiochemical engineering
The invention discloses a support, and aims to provide a portable leveling rod support which is simple in structure and convenient to operate and improves the measurement accuracy and the measurement speed. The portable leveling rod support disclosed by the invention comprises a frame-structured fixed rack (1) and a telescopic support (2) fixedly connected with the fixed rack (1), wherein the left and right sides of the fixed rack (1) are respectively provided with a fastening device, and a leveling rod (3) is arranged in an inner frame of the fixed rack (1) through the fastening devices, so that the leveling rod (3) can be vertically erected and keeps stable, thereby reducing the working difficulty of the measurement personnel, avoiding measurement errors caused by wind effect or manual support, and improving the measurement accuracy and the measurement speed. The support disclosed by the invention is applied to the field of leveling rod supports.
Owner:NO 7 ENG CO LTD OF CHINA RAILWAY 19 BUREAU GRP
Sleeve clip type measurement tripod
InactiveCN102777737ALeveling precisionEasy to operateSurveying instrumentsStands/trestlesLevel staffPrism
The invention discloses a sleeve clip type measurement tripod which comprises a pedestal (1) and support legs (2) connected with the pedestal (1). The pedestal (1) is annular, and at least three transversal jack screws (3) are evenly distributed on the annular pedestal (1). The measurement tripod can be applied to columnar measurement facilities (such as a leveling rod, a reflecting prism, a marker post and so on). By adjusting the support legs and the transversal jack screws on the plane of the annular pedestal, the measurement tripod can be precisely leveled without the manual operation of a measuring operator. The measurement tripod is easy to operate and improves the measurement efficiency and precision.
Owner:刘雁春 +2
Two-instrument simultaneous measuring method for increasing leveling precision
InactiveCN102636155AHigh speedReduce labor intensityHeight/levelling measurementLevel staffLevelling
The invention relates to a two-instrument simultaneous measuring method for increasing leveling precision, which comprises the steps of: selecting a measuring technician, a leveling ruler, a ruler pad and a leveler; laying branch leveling lines; arranging a rearview ruler, a leveler and a foresight ruler; respectively erecting one leveler by two viewers; reading an indication of the rearview ruler; recording; rereading the indication of the foresight ruler; calculating altitude difference; checking if an error exists in the indications read by the two viewers; if the error exists, rereading and recording, and then reading the indications of the foresight ruler by the two viewers and calculating the altitude difference till the altitude difference is the same; respectively recording the indications in a manual; calculating the altitude difference of the indication of the rearview ruler and the indication of the foresight ruler; repeating the steps for performing a second measuring station; measuring along a leveling line direction in turn till completely measuring all the branch leveling lines to a target leveling point; calculating the altitude difference delta h and the algebraic sum sigma delta h of all the measuring stations; and judging the relative height of the altitude HA of a known leveling point and the altitude HB of an unknown leveling point. According to the two-instrument simultaneous measuring method, the labor intensity of the measuring technician is reduced and the speed of engineering progress is increased.
Owner:TIANJIN 20 CONSTR
Error detection device of electronic reading system of digital level and detection method thereof
The invention discloses an error detection device of an electronic reading system of a digital level and a detection method thereof. The detection device comprises a lifting table, a leveling rod and a telescope system; the leveling rod is vertically fixed on a moving planker of the lifting table, and the telescope is arranged in front of the digital level to be detected; an object lens of the telescope is opposite to an object lens of the detected digital level, and an ocular lens of the telescope is opposite to the leveling rod. During detection, the detected digital level observes the leveling rod through the telescope to record read data of the digital level when the leveling rod is arranged at different positions, and determines an error of the electronic reading system of the digital level according to a standard deviation formula. In term of the scheme, a detection device with simple structure, compact space and lower price, and a simple, convenient and rapid detection method are adopted on the premise of factually reflecting precision level and reliability level of instruments.
Owner:BEIJING BOFEI INSTR
Vertical rod pad for leveling rod
InactiveCN102661735ARelieve fatigueSimple structureHeight/levelling measurementObservational errorLevel staff
The invention discloses a vertical rod pad for a leveling rod. The vertical rod pad for the leveling rod mainly comprises a cylindrical caliber rule slot, a vertical rod pad base, a cuboid caliber rule slot, a circular leveling instrument and three bracket legs in the same shape and size, wherein a foot spiral structure is arranged on the intermediate part of each bracket leg; the vertical rod pad base is a triangular metal piece; a metal rolling bearing is arranged in the cylindrical caliber rule slot on the upper part of the vertical rod pad base; the cuboid caliber rule slot on the lower part of the vertical rod pad base is positioned in the centre of the vertical rod pad base and is hollow; a small circular hole is reserved in the centre of the bottom of the cuboid caliber rule slot and serves as a centering hole of the vertical rod pad; the small circular hole is positioned in the centre of the overall vertical rod pad of the leveling rod; and a circular leveling instrument is welded on the intermediate part on one edge of the vertical rod pad base. When performing leveling measurement, a measurer can insert the leveling rod into the vertical rod pad for the leveling rod for stabilization and reinforcement; measurement errors caused by the shake of a hand holding the leveling rod is effectively reduced; the measurement precision is improved; and moreover, the fatigue of the measurer generated by stabilizing the leveling instrument is alleviated.
Owner:潘述铃
Paired type observing ruler and gauge combined composite leveling instrument
InactiveCN102901486ARealize direct levelingImprove work efficiencyHeight/levelling measurementPair typeTerrain
The invention discloses a paired type observing ruler and gauge combined composite leveling instrument; the composite leveling instrument is provided with a column-shaped ruler body (1) and a level (6), wherein a leveling staff (2) and an observing unit (3) are fixed on the same column surface of the column-shaped ruler body (1); the leveling staff (2) is parallel to the axis of the column-shaped ruler body (1); the observing unit (3) can slide up and down; the observing unit (3) is provided with an opposite side height signal detector (4) and a home height signal detector (5), which are fixedly connected with each other; and a collimation axis of the opposite side height signal detector (4) is vertical to the axis of the column-shaped ruler body (1). Point-to-point direct leveling is truly realized; point selection and point arrangement are not limited by terrain environments; and leveling can be conveniently carried out in complicated geographic conditions, such as abrupt slopes, ditches, rivers, mountainous areas and so on.
Owner:刘雁春 +2
Large-area ultra-soft foundation settlement monitoring device and method
InactiveCN105804041AReduce disturbanceReduce distractionsHeight/levelling measurementIn situ soil foundationSurface layerLevel staff
The invention provides a large-area ultra-soft foundation settlement monitoring device and method. The device comprises a recovery peg, a settlement plate and a leveling rod. The settlement plate is placed on a foundation surface layer to be measured. The leveling rod is fixed to the settlement plate. The face which is provided with scales of the leveling rod faces towards the recovery peg. The elevation of the top of the recovery peg is higher than a bottom scale mark of the leveling rod. Scale changes of the leveling rod are measured and read through an observation instrument erected on the recovery peg so as to obtain the settlement amount of the foundation surface layer. The device has the advantages of simple structure, convenient operation, high measuring precision and the like, and manual rod support and station moving are not needed, so that the labor cost is greatly lowered, the working efficiency is improved, and the device has high application value.
Owner:浙江广川工程咨询有限公司
Leveling rod suspended leveling method for settlement monitoring
InactiveCN105865416AEasily brokenReduce labor intensityHeight/levelling measurementLevel staffEngineering
The invention discloses a leveling rod suspension type leveling measurement method for settlement monitoring. Hang the leveling rod with a suspension joint on the top to the monitoring mark, and carry out leveling observation after the leveling rod hangs naturally, and calculate the height difference of the station according to the different vertical ruler and hanging ruler methods of the front and rear leveling rods of the station, and then Combined with the reference points, the elevation and settlement of the monitoring marks can be calculated. The method of hanging the leveling rod of the present invention enables the measurement mark to be buried at a higher position, which solves the problem that the measurement mark is easily damaged, and also reduces the labor intensity of the work of holding the ruler during observation; at the same time, there is no need to switch the working mode of the instrument during observation, High work efficiency is guaranteed. The invention is mainly applicable to the settlement monitoring during the construction and operation of foundation projects such as building construction, tunnels and bridges.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Automatic smoothening leveling ruler
InactiveCN102853815AHigh precisionGuaranteed to be verticalHeight/levelling measurementTransfer systemLevel staff
The invention is suitable for leveling survey in topography, and relates to an automatic smoothening leveling ruler. The leveling ruler is composed of parts such as a ruler body (1), a circular level (2), a camera (3), a maincenter control center (4), a transmission system (5), a rotation shaft (6) and a ruler pad (7). According to the invention, the circular level (2) can exactly measure a perpendicular condition of the leveling ruler, the camera (3) positioned above the circular level (2) can continually shoot the positions of air bubbles and send the shot photos to the maincenter control center (4) through a transfer system for judgment so as to send out corresponding instructions; and the rotation shaft (6) is adjusted according to the instruction, the position change of the air bubbles of the circular level (2) is introduced until the photos sent back by the camera (3) show that the air bubbles are in the center, and then the leveling ruler is perpendicular. The leveling ruler strengthens the perpendicular precision of the leveling ruler, the perpendicularity of a standing ruler is guaranteed, a measuring error is reduced, and meanwhile, the operation is simpler.
Owner:NANJING DAWU EDUCATION TECH
Rotary kiln supporting wheel installation inclination measuring device and its measuring method
InactiveCN102297681AImprove efficacyEasy to operate and portableIncline measurementMeasurement deviceCircular cone
The invention relates to a measuring device and a measuring method for inclination in equipment installation. A device for measuring the inclination of supporting wheels of a rotary kiln, which includes a precision level gauge: it also includes a conical measuring body, a groove is arranged on the bottom plane of the conical measuring body, and the precision level gauge is embedded in the groove. A method for measuring the inclination of supporting wheels of a rotary kiln, which includes the above-mentioned inclination measuring device, and includes the following steps: accurately determine the positions of the equipment inclination detection surface or the inclination detection points A and B of the central axis of the equipment, and place the The apex of the conical measuring body is placed at point A, and the reading Ha of the precision level gauge is read; the apex of the conical measuring body is placed at point B, and the reading Hb of the precision leveling gauge is read; the following formula is used to calculate the Rotary kiln supporting wheel installation inclination α=|Ha-Hb| / L, where L is the distance from point A to point B. The invention can directly measure the inclination of the equipment and eliminate the accumulated errors of indirect measurement.
Owner:CHINA MCC20 GRP CORP
Universal telescoping brace rod for leveling staff and method
The invention relates to the technical field of leveling staff, and specifically to a universal telescoping brace rod for leveling staff and a method. The universal telescoping brace rod comprises leveling staff, and is characterized in that: a main body (1) of a connecting piece is of a cylinder structure; one end of the main body is provided with a projecting block (2); the upper part of the projecting block is connected with a male catch connecting piece (3) which is inserted into a female catch (15) at the center of the leveling staff (14); the other end of the main body is connected withone end of a first telescoping brace rod support (7); a male tenon (8) is provided at the left of the upper side of the main body and inserted into a horizontal slotted hole (10) at one end of a universal joint body (9), the other end of the universal joint body is connected with one end of a second telescoping brace rod support (13). When the universal telescoping brace rod is used, the levelingstaff is erected at a measuring point, a universal joint is pulled open leftwards, and telescoping brace rods are respectively stretched and locked when the telescoping brace rods fall to the ground;after measuring is finished, a second telescoping brace rod is lifted up slightly, and the universal joint is pulled backwards to its original location, which enables the two telescoping brace rods to be vertical and parallel again. The universal telescoping brace rod provided in the invention can rotate at every direction and is convenient for actual utilization.
Owner:SCI & TECH DEV COMPANY OF SRIBS
Levelling staff capable of adjusting observation position and measurement technique thereof
ActiveCN101788285ASatisfy the high requirement of line of sightReduce setup costsHeight/levelling measurementObservation pointLevel staff
The invention discloses a levelling staff capable of adjusting the observation position, which comprises the body of the levelling staff (1) and an auxiliary holding rod, the auxiliary holding rod comprises an upper plate (10), a lower plate (18) and upright rods (15), the upright rods are connected between the upper plate and the lower plate and limit the upper plate and the lower plate, the upper plate is provided with a notch (11), and the lower end surface of the upper plate is provided with an upper contact (13); a lower contact (17) is arranged at the center of the upper end surface of the lower plate, and staff retainers (16) are also arranged around the lower contact on the upper end surface of the lower plate. The invention also discloses a technique using the levelling staff to carry out measurement, which includes steps such as checking the auxiliary holding rod, mounting the levelling staff on the auxiliary holding rod, placing the auxiliary holding rod, measuring, determining the additive constant of the holding rod and processing data. When the position of an observation point is higher than the sight line of a level, the height of the levelling staff can be reduced, and thereby the overall observation cost of a special operation situation is reduced.
Owner:LUOYANG URBAN PLANNING & ARCHITECTURE DESIGN RES INST CO LTD
Automatic lifting monitoring device equipped with invar level staff and used for monitoring ground surface settlement as well as method
The invention discloses an automatic lifting monitoring device equipped with an invar level staff and used for monitoring ground surface settlement as well as a method. The device comprises a ZigBee remote control, a single chip microcomputer control box, a measuring hole protection device, an automatic lifting device and an improved barcode invar level staff. The method comprises the following steps: 1, an instruction is sent to the single chip microcomputer control box through the ZigBee remote control within a certain distance to control the measuring hole protection device and the automatic lifting device; 2, the single chip microcomputer control box sends an instruction, and the measuring hole protection device is opened; 3, the single chip microcomputer control box sends an instruction, the invar level staff automatic lifting device is started, and the invar level staff is lifted; 4, the invar level staff is dropped and retracted automatically after measurement, and the single chip microcomputer control box and the invar level staff automatic lifting device are retracted in the measuring hole protection device at ordinary times and are standby with quite low power. The automatic lifting monitoring device realizes remote control of automatic erection of the invar level staff through the portable ZigBee remote control, is simple and convenient, can be used for monitoring ground surface settlement during tunnel construction and greatly saves cost for manual erection of the invar level staff.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Suspended digital leveling rod and measuring method using same
InactiveCN102607514AReduce labor intensityImprove measurement efficiencyHeight/levelling measurementLevel staffEngineering
A suspended digital leveling rod is formed by mounting a hanger 2 at the top of a common digital leveling rod. The hanger 2 is fixed to a rod body and is made of the material the same as that of a bottom 4 of the leveling rod. The hanger 2 comprises a bottom 3. The flatness of the bottom 3 is equal to that of the bottom of the leveling rod, and the bottom 3 of the hanger is level to the bottom 4 of the leveling rod. By means of the suspended digital leveling rod and a measuring method using the same, the defects in measurement with the leveling rod upended can be overcome. The leveling rod can be suspended on an observation label at a higher position achieve leveling, and operating efficiency can be improved while measuring precision can be guaranteed. The leveling rod is applicable to high-speed rail settlement observation, building settlement observation, tunnel leveling and the like. The more efficient method for leveling is provided.
Owner:明祖涛
Leveling rod for night surveying
InactiveCN102636154AEven reflectionUniform irradiationPoint-like light sourceLighting elementsLevel staffEngineering
The invention belongs to stadia measurement tools, and in particular relates to a leveling rod for night surveying, aiming at the blank that the current precise leveling rod is not provided with illuminating equipment. The leveling rod for night surveying comprises a leveling rod body 1, an illuminating device 2 and a power 3, wherein the illuminating device 2 is located at one side of the scale panel of the leveling rod body; and the power 3 is connected with the illuminating device 2. Compared with the prior art, the leveling rod for night surveying disclosed by the invention has the advantages that a light source reflects uniformly and is prevented from directly radiating the leveling rod body scale to influence the indications of the leveling rod, so that light rays radiate uniformly and have moderate brightness.
Owner:天津铁三院实业有限公司
Measuring leveling rod and using method thereof
The invention relates to a measuring leveling rod and a using method thereof, and belongs to the technical field of constructional engineering measuring equipment, the measuring leveling rod comprises a plurality of rod bodies which are sleeved together step by step, in every two adjacent rod bodies, the rod body sleeved with the inner side is called as an inner rod body, and the rod body sleeved with the outer side is called as an outer rod body; the inner ruler body extends out of the outer ruler body, a scale panel is attached to the side wall, extending out of the outer ruler body, of each inner ruler body, and all the scale panels are located on the same side, located on the same vertical plane and connected together in an abutting mode. The scale panel can move close to or away from the inner ruler body, and both the scale panel and the inner ruler body can be contained in the corresponding outer ruler body. After the leveling rod is unfolded, all the scale panels automatically move to the same vertical plane under the effect of springs, so that the consistency of transverse spans between all the scales and the leveling instrument is high, and the measurement precision of the levelness is improved.
Owner:北京同创天成工程勘测有限公司
Leveling device and measurement method thereof
InactiveCN104567811AGuaranteed accuracyAccurately reflectIncline measurementLevel staffMechanical engineering
The invention discloses a leveling device and a measurement method thereof, relates to the technical field of leveling instruments and aims to solve the problems that during the measurement of an existing leveling rod, the leveling rod needs to be held manually, the work efficiency is low, and the data cannot be measured accurately because of shake of a worker who holds the leveling rod. The leveling device comprises a ruler which stands on a ruler pad, a leveling air bubble which is mounted on the side surface of the ruler, a slide way which is arranged along the longitudinal direction of the ruler and a fixing bracket which can slide relatively along the slide way, wherein the fixing bracket comprises a slider matched with the slide way, and bracket legs which are connected with the slider by bolts. The measurement method comprises the following steps: (1) vertically arranging the ruler on the ruler pad; (2) moving the slider to enable the fixing bracket to reach suitable height, and tightening and fixing the slider on the slide way; (3) regulating the bracket legs so that the bracket legs can form a stable structure with the ruler, tightening, regulating the length of the bracket legs and fixedly locking so that the leveling air bubble is in the middle and leveling can be realized.
Owner:SHANGHAI CONSTRUCTION GROUP
Zero reading level measurement method and accurate adjustment structure for height of leveling instrument
InactiveCN102359776AAvoid difficultyAvoid insecurityHeight/levelling measurementReading levelViewpoints
The invention discloses a zero reading level measurement method and an accurate adjustment structure for the height of a leveling instrument; the zero reading level measurement method is characterized by comprising the following steps of: in a measurement process, respectively erecting the leveling instrument and a rearview leveling staff at places which are equal to the elevation of the top surface of a measured constructional element; adjusting the height of the leveling instrument so that the top surface of the measured constructional element is flush with the height of a level mark silk thread in the leveling instrument; maintaining the height of the adjusted leveling instrument, defining the position of the corresponding height of the level mark silk thread in the leveling instrument on a rearview leveling staff as a viewpoint A; and measuring the elevation of the rearview point A on the rearview leveling staff by using a known leveling point B, wherein the elevation of the rearview point A is the elevation of the top surface of the measured constructional element. A fore-view leveling staff is not needed to be erected on the top surface of the measured constructional element, thereby being very effective for avoiding the difficulty and insecurity caused by ascending of levellers.
Owner:THE FIRST ENG CO LTD OF CTCE GRP
Telescopic brace rod connecting device of levelling staff
InactiveCN101968355ASimple structureNovel structureHeight/levelling measurementStands/trestlesLevel staffEngineering
The invention relates to the technical field of levelling staffs, in particular to a telescopic brace rod connecting device of a levelling staff. The device is characterized in that a male / female back-drawing fastener (1) is arranged in the middle of the levelling staff; a hole is formed on the male / female back-drawing fastener (1) and movably connected with a connector (2) of the telescopic brace rod; the connector (2) is penetrated in a socket body (4) through a bolt (3) and then fixed with a nut (6) through a gasket (5); a groove is formed from the middle of the bottom to the right side wall of the bolt (3); a movable universal shaft is arranged in the groove; another telescopic brace rod is arranged on the universal shaft; and the two brace rods are stretched to the ground with an angle of about 45 degrees respectively, and forming a triangular support with the vertical levelling staff. Compared with the prior art, the connecting device has the advantages of simple and novel structure, convenient, safe and reliable use and easy assembly and disassembly; moreover, as absolute stability of the levelling staff can be kept during measurement, the connecting device fills the blank that no assistant support device is available to the levelling staff in the measurement industry.
Owner:罗建新
Double-side leveling ruler
PendingCN108267117AIncrease the number of observationsImprove observation accuracyHeight/levelling measurementLevel staffEngineering
The invention provides a double-side leveling ruler, which comprises a ruler body, wherein the ruler body comprises a first bar code leveling surface and a second bar code leveling surface arranged inthe length direction; the first bar code leveling surface and the second bar code leveling surface are respectively positioned at the two sides of the ruler body width direction; the ruler body can be used for simultaneously performing twice height measurement respectively through the first bar code leveling surface and the second bar code leveling surface arranged in the length direction; the first bar code leveling surface and the second bar code leveling surface are positioned at the two sides of the width direction of the ruler body; the two groups of measuring data can be obtained at thesame time; the observation times can be increased; through the processing on the two groups of height measuring results, the observation precision is improved; the error accumulation is avoided; themeasurement accuracy is improved.
Owner:BEIJING FOREVER TECH
Excavation face bottom settlement deformation monitoring device and use method thereof
ActiveCN106871866AAccurate monitoringHigh frequencyHeight/levelling measurementWater resource assessmentFilling materialsLevel staff
The invention discloses an excavation face bottom settlement deformation monitoring device and a use method thereof. The upper end of a sleeve is provided with a protective cover, the lower end of the sleeve is filled with a filling material, a plurality of aluminum rods connected by aluminum rod joints are arranged in the sleeve, one end of the aluminum rod is connected to a head of the monitoring device, the head 1 of the monitoring device passes through the filling material and extends out of the sleeve, the end of a leveling rod is provided with a joint connected to the other end of the aluminum rod, the end of the leveling rod is connected to the leveling rod, and a level bubble device is installed on the aluminum rod close to the excavation face. The device solves the problem that the excavation face bottom settles in the case of no slope making and excavation, accurately measures the settlement amount of an excavation bottom face and an excavation bottom face settlement change rate and provides important reference base for judging the safety situation of excavation.
Owner:SINOHYDRO BUREAU 8 CO LTD +2
Elevation measurement method and system
PendingCN113063399AOvercome precisionOvercome operabilityHeight/levelling measurementLevel staffEngineering
The invention discloses an elevation measurement method and system. The method comprises the steps that the elevation of a first-layer known point is acquired; the elevation line distance from the center of a total station to the elevation of the first-layer known point is acquired through the total station; a through hole is formed in the vertical direction from the first layer to a layer to be measured in a penetrating mode, a prism head is arranged at the through hole of the layer to be measured, a telescope of the total station vertically points to the prism head and coincides with the center of the prism head, and the total station is operated to measure the distance and obtain the distance; a conversion device provided with the prism head has an identification elevation, and an identification point distance constant K from the prism head to the identification elevation is measured; a level gauge is installed on the layer to be measured, and a first leveling rod is erected at the top of the elevation mark Hi of the conversion device; and a second leveling rod is erected at the elevation Hb of the guide measurement point of the to-be-measured layer. According to the method, the zenith distance function of the total station is utilized, the first-layer elevation datum point is guided to be measured to the conversion device of the elevation of the layer to be measured through the first-layer elevation datum point, and then the elevation on the conversion device is guided to be measured to the layer to be measured through the level gauge.
Owner:THE 4TH CONSTR ENG CO LTD OF CHINA RAILWAY NO 4 ENG GRP +1
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