160 results about "Gauge (instrument)" patented technology

The invention discloses a camber adjusting method based on a rough rolling bending value and finish rolling wedge-shaped data. According to the camber adjusting method, camber deformation of a plate blank is adjusted by controlling the hydraulic rolling reduction of a four-roller rough rolling machine in the rough rolling process; an infrared width gauge is arranged at the position 5-10 m away from an outlet of the roughing mill. A finish rolling outlet multifunctional instrument is arranged at an outlet of the finish rolling machine and can detect wedge-shaped data of the strip steel; according to the method, the plate blank can be adaptively adjusted according to the rough rolling bending value and the finish rolling wedge-shaped data of the previous plate blank, so that the camber deformation of the plate blank is avoided as far as possible.

The utility model provides an efficient double-diameter synchronous comprehensive measuring instrument, which relates to the technical field of measuring instruments and comprises a supporting seat, a convex cover plate is fixed and communicated to the top of the supporting seat and close to the center, a square groove is formed in one side wall of the convex cover plate and close to the top, inner diameter grooves are symmetrically formed in the inner wall of the square groove, and the inner diameter grooves are communicated with the convex cover plate. The two side walls of the convex cover plate are each fixedly provided with four measuring heads, one end of each measuring head is provided with a first spray head in an embedded mode, an air source device is arranged in the supporting base, the top of the air source device is fixedly communicated with a connecting pipe, and the top of the connecting pipe is fixedly connected with a convex box; according to the utility model, the part is embedded into the inner diameter groove and the measuring head, and then the first nozzle and the second nozzle are used for spraying gas, so that the inner diameter and the outer diameter of the part can be synchronously measured, the use and the operation are simple, the measurement is convenient, the size of the part is out of tolerance, the out-of-tolerance can be displayed on a screen of a pneumatic gauge, and visual fatigue is avoided; and quality control is facilitated.

The utility model discloses the technical field of machining measurement device, more specifically discloses a kind of for the size measurement tool of incomplete circle, comprising: tool main body, detachably set on part;Compensation component, set on tool main body, can be synchronous with the arc to be processed Machining;Wherein, the straight line of the center of the arc to be processed of compensation component and arc to be processed can pass through arc to be processed;Measuring component is used to measure the diameter between compensation component and arc to be processed;By using the utility model, arc can be measured in real time during processing, cancel the use of radius gauge and three-dimensional coordinate instrument;Greatly reduce the difficulty of real-time measurement arc actual size in part processing process, improve the arc size measurement stability and accuracy, can effectively improve the product quality and stability of part.

The invention relates to a transmission shaft retainer inner sphere diameter detector, in particular to a retainer inner sphere diameter detector for a fixed end joint and a movable end joint of a car constant velocity universal joint transmission shaft, which comprises a support, a rotating shaft A, a rotating shaft B and a positioner, a measuring rod A is rotatably connected to the rotating shaft A, the measuring rod A is perpendicular to and fixedly connected with a measuring head A, a measuring rod B is rotatably connected to the rotating shaft B, and the measuring rod B is perpendicular to and fixedly connected with a measuring head B; a gauge rod of the dial gauge and the measuring rod B are fastened through a screw, a contact on the dial gauge makes contact with the end face of a screw installed on the measuring rod A, one end of the bolt penetrates through the measuring rod A and is in spiral connection with the measuring rod B, the spring is sleeved on the bolt, the positioner is provided with a spherical groove, a square notch, a groove opening A and a groove opening B, the square notch is opposite to a reamed hole in the working table plate, the measuring head A is opposite to the groove opening A, and the groove opening B is opposite to the groove opening B. And the measuring head B is opposite to the groove opening B. When the detector is used for measuring the inner ball diameter of the retainer, not only is the measurement convenient, but also the detection precision of the inner ball diameter of the retainer can be ensured.

1. The name of the design product: the reference assembly of rail straightness measuring instrument. 2. The use of the design product: the reference assembly of rail straightness measuring instrument for detecting the straightness of rail. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

1. Name of the product in this design: Diamond measuring instrument (capable of measuring a small diameter of 1mm). 2. Application of this design: Probe for online precision measurement of machine tools. 3. The key design feature of this product is its shape. 4. Images or photos that best illustrate the design key points: composite state diagrams.

The invention belongs to the technical field of ships, and discloses a ship water gauge mounting method which comprises the following steps: S1, sequentially placing a plurality of water gauge segments on a plurality of pier bases; s2, pre-confirming the positions of a height mounting line and a rib position line and the plate thickness of a bottom plate outside a mounting rib position; s3, a waterline and a rib detection line are determined and marked, a first sample punching point is determined on the waterline, and a second sample punching point is determined on the rib detection line; s4, scribing the height mounting line and the rib position line in the step S2 by using a total station according to the step S3; and S5, confirming an upper mounting line and a lower mounting line of each water gauge character, and performing spot welding and full welding on the water gauge character. According to the ship water gauge character mounting method, the water gauge character can be mounted when the ship is transferred to an external field in a segmented, tire-free and placed mode, the water gauge character is mounted through the total station, the height mounting line, the rib position line, the water line, the rib detection line, the mounting line and the like, and the mounting precision is improved; therefore, the general assembly stage in the prior art is improved to the segmentation stage for installation of the water gauge character.

The utility model discloses an automatic calibrating device for a contact network geometric parameter measuring instrument, which comprises a first operating platform and a second operating platform, a laser range finder, a contact network geometric parameter measuring instrument and a prism are arranged on the first operating platform, and a second support is horizontally arranged on the second operating platform in a sliding manner. A first straight line fine adjustment assembly and a line pattern plate are arranged on the second support, a left lifting fine adjustment assembly and a right lifting fine adjustment assembly are arranged between the first straight line fine adjustment assembly and the line pattern plate, the left lifting fine adjustment assembly and the right lifting fine adjustment assembly are both used for adjusting the height of the line pattern plate, and a second level gauge is arranged on the line pattern plate. A plurality of scale marks are arranged on the line pattern plate; scale marks on the line pattern plate are divided into two scale measuring plates. Compared with the prior art, the calibrating device provided by the utility model realizes the automatic, continuous and digital calibration of the height value and the pull-out value of the contact line of the geometric parameter measuring instrument of the overhead line system. The whole structure is simple, and the calibrating device is convenient to debug.

The invention discloses a four-axis diameter measuring instrument and a method thereof, belongs to the technical field of diameter measuring instruments, and provides the following scheme that the four-axis diameter measuring instrument comprises an adjustable four-axis diameter measuring mechanism, a preprocessing mechanism is arranged on the adjustable four-axis diameter measuring mechanism, and the adjustable four-axis diameter measuring mechanism comprises a fixed base and two fixed shells; one of the fixed shells is fixedly connected to the fixed base; according to the invention, through the detachable design of the two laser multi-axis diameter measuring instruments, the two laser multi-axis diameter measuring instruments can operate independently and finish diameter measurement of two separated wires synchronously when processing batch single-specification wires and improving the efficiency, and the two laser multi-axis diameter measuring instruments can be combined to form a four-axis measuring system when comprehensive detection of high-precision wires is needed. The four-dimensional synchronous measurement of the wire rod is realized, multiple adjustment is not needed, the problems of low single-mode efficiency and complicated multi-dimensional operation of the traditional equipment are solved, the wire rod can be cleaned in advance through the cleaning assembly before diameter measurement, and the accuracy of measured data is ensured.

The utility model discloses an engineering investigation level gauge with a double stable structure, which comprises a measuring instrument, a circular bottom plate, a turntable, a movable bracket and a lower fixing plate, the bottom of the lower fixing plate is fixedly connected with a fixing pipe, a connecting rod is inserted into the inner side of the fixing pipe, the bottom of the connecting rod is fixedly connected with a ground nail, and the ground nail is fixedly connected with the turntable. A first through hole is formed in the surface of the movable support, a sliding rod is inserted into the inner side of the first through hole, a connecting block is fixedly connected to the bottom of the sliding rod, a threaded hole is formed in the surface of the connecting block, a first sliding groove is formed in the surface of the circular bottom plate, a butterfly bolt handle is inserted into the inner side of the threaded hole, and a butterfly bolt handle is inserted into the inner side of the first sliding groove. The bottom of the measuring instrument is fixedly connected with a sliding block, a second sliding groove is formed in the top of the rotating disc, and the sliding block is inserted into the inner side of the second sliding groove. According to the horizontal measuring instrument for engineering investigation, a dual-stable structure is installed, so that the horizontal measuring instrument is more stable in use, and a device facilitating the disassembly of the gradienter is arranged.

The utility model discloses an expansion joint width gauge for bridge detection, which relates to the field of bridge detection, and comprises a ruler sleeve, a fixed column is fixed on one side of the top of the ruler sleeve, a screw sleeve is fixed inside the fixed column, the inner wall of the screw sleeve is in meshed connection with a screw rod, and the outer surface of the screw rod is in meshed connection with a fixed disc. The outer surface of the fixing disc is provided with a fixing sleeve, the screw rod penetrates through the top of the fixing sleeve, the middle of the top of the ruler sleeve is fixedly provided with a telescopic column, one side of the telescopic column is fixedly provided with a handle, and the handle is located on one side of the fixing sleeve. When the thread sleeve moves, the fixing column is driven to move, when the fixing column moves, the ruler sleeve is driven to move, when the ruler sleeve moves, the measuring ruler moves, when the measuring ruler moves, the measuring ruler can measure the depth of the bridge expansion joint conveniently, and the accuracy of integer values is improved.

The present invention relates to the technical field of bearing groove bottom detection, and proposes an inner ring cross-ball distance and groove bottom spacing measuring instrument, including a base with legs, through holes and grooves; a slide is slidably arranged on the base, and the slide is provided with multiple bearing surfaces with gradual height changes, and the bearing surfaces are used to place the test piece; the first push rod is fixed on the base and the end is used to contact the groove bottom of the test piece; the second push rod is slidably arranged in the groove and the end is used to contact the groove bottom on the other side of the test piece; the dial indicator is arranged on the base and the input telescopic end is located above the through hole; the push rod is slidably arranged in the through hole, and the push rod is used to push the input telescopic end; the connecting rod is slidably arranged on the base, and one end is connected to the second push rod, and the other end is connected to the push rod, and the connecting rod and the slide are located on opposite sides of the base. Through the above technical scheme, the problems of complex structure and high cost of bearing groove diameter measuring instruments in the related technology are solved, and a low-cost and high-precision measuring device is proposed.

The invention discloses a method for measuring straightness circle run-out of a spinning cylinder, which not only adapts to spinning cylinders with different lengths and outer diameters, but also can avoid the problem of deformation of a thin-wall spinning cylinder caused by clamping of a traditional manual detection platform through a roller base and a roller which are adjustable in spacing, and guarantees the stability of a measurement reference. Meanwhile, expensive and complex equipment such as a laser interferometer and a three-coordinate detector does not need to be relied on, the detection cost of the large or overweight spinning cylinder is effectively reduced, and the high-cost burden brought by a special customized instrument is eliminated; by means of the PLC servo system, constant-speed sliding of the dial indicator and constant-speed autorotation of the spinning cylinder are achieved, operation is convenient and fast, controllability is high, comprehensive measurement of generatrix straightness at different angles and run-out of different section circles can be accurately completed, detection accuracy, practicability and economical efficiency are considered, and detection requirements in actual production are better met. The device is especially suitable for a thin-wall spinning cylinder, external force cannot be applied to the spinning cylinder in the measurement process, and the deformation risk caused by measurement operation is avoided.

The present application relates to a kind of high concentricity oil distribution shaft finishing method for ship, the design of special cover size at both ends, ensure the accuracy of center hole after installation;Fine turning process, cooperate with advanced HSF1 type ultrasonic thickness gauge monitoring workpiece wall thickness value ensure the workpiece deep hole and outer diameter 0.05mm concentricity. Formulate "temperature compensation principle and method of precision parts size measurement", temperature compensation is used in precision machining to minimize measurement error. Deep hole drilling and boring machine has been unable to complete the oil distribution shaft inner hole ∅250H8, ∅230H8 roughness Ra3.2 step deep hole processing, reform deep hole boring equipment increases inner hole honing head to solve the problem, using digital electronic percentage table measuring instrument group solves the problem of detection. Use modular special tool combined with tungsten steel shockproof tool bar to complete the processing of reverse R angle inside waist type groove, significantly improve efficiency. Use CAM software to select tool parameters analysis, optimization, calculation and generation program, develop reverse thinking programming, ensure that tool path is clear, reliable, good stability.

The utility model discloses a cold-rolled steel strip thickness gauge, relates to the technical field of cold-rolled steel strips, aims to solve the technical problem that a current cold-rolled steel strip coil is unstable in fixation and easy to shake and damage during thickness measurement, and comprises a fixed frame mounted at the top end of a workbench. A cold-rolled strip steel coil is placed on the supporting plate, the buffering support supports the supporting plate, so that the supporting plate sinks into the inner side of the fixing frame, the cold-rolled strip steel coil also falls into the inner side of the fixing frame, longitudinal movement of the cold-rolled strip steel coil is limited through the fixing frame, and the air cylinder enables the fixing piece to be inserted into a center hole of the cold-rolled strip steel coil. The transverse movement of the cold-rolled strip steel coil is limited, and then the thickness of the cold-rolled strip steel is detected through the auxiliary roller and the thickness measuring instrument. The thickness measuring device has the advantages that the movement of the cold-rolled strip steel coil can be limited in the longitudinal direction and the transverse direction, bottom buffer support is provided for the cold-rolled strip steel coil, the cold-rolled strip steel coil cannot shake during thickness measurement, and the cold-rolled strip steel coil cannot be damaged due to unstable fixation.

This invention discloses a wire core stabilizing frame for a wire and cable diameter gauge, comprising a support column, a mounting base, two sets of spring-loaded movable pulley assemblies, a fixed pulley assembly, U-shaped guide wheels, a height adjustment mechanism, and a horizontal fine-tuning mechanism. A fixed base is provided at the bottom of the support column. The height adjustment mechanism adjusts the vertical height of the mounting base, and the horizontal fine-tuning mechanism fine-tunes the horizontal position of the movable and fixed pulley assemblies to achieve precise alignment with the diameter gauge. U-shaped guide wheels at the inlet and outlet ends of the mounting base limit wire core swaying, while the movable pulley assembly with a spring-loaded mechanism counteracts Z-axis jitter, further enhancing wire core stability in conjunction with a lateral compression spring. The spring-loaded mechanism includes a pressure sensor and a control panel for precise pressure adjustment. This invention achieves dual precise wire core positioning, ensuring coaxiality and angular consistency upon entering the diameter gauge, improving measurement accuracy. It is also highly adaptable, easy to operate, and protects the wire core, making it widely applicable in online diameter measurement processes such as wire and cable drawing and extrusion.

The utility model relates to the technical field of pressure instrument testing, and discloses a pressure instrument testing device which comprises a support, a plurality of outer shells arranged at equal intervals are installed on the upper surface of the support, adjusting devices used for adjusting environment variables are arranged in the outer shells, a detection pipeline is arranged above the support, and the detection pipeline is communicated with the outer shells. The detection pipeline penetrates through the outer shell, and the contact position of the detection pipeline and the outer shell is coated with sealant. According to the pressure instrument testing device, the pressure gauge bodies of the same specification are installed in the outer shells, the environments in the outer shells are different by opening and closing the corresponding electromagnetic valves, different variable comparison tests under the same model are achieved, or the pressure gauge bodies of different specifications are installed in the outer shells, so that the test efficiency is improved. By opening and closing the corresponding electromagnetic valves, the internal environment of each outer shell is the same, parallel contrast test under the same condition is realized, more comprehensive detection is further realized, and the detection efficiency is improved.

This invention provides a bolt tightening management system that allows for simpler and more accurate evaluation of the quality of hydraulic tightening. [Solution] The bolt tightening management system 1 manages the tightening of bolts in multiple fastening parts 90 to which hydraulic tightening is applied by a tensioning device 50 which comprises a housing part 51 for housing bolts 93, a movable part 52 that screws with the bolts 93 and forms an oil chamber 53 between itself and the housing part 51, and a pump 55 that supplies pressurized oil to the oil chamber 53. The bolt tightening management system 1 comprises a pressure gauge 11 for measuring the pressure of the pressurized oil discharged from the pump 55, an elongation measuring instrument (dial gauge 12) for measuring the elongation of the bolts 93, which is the difference in length of the bolts 93 before and after the supply of pressurized oil, and a storage device (server 3) that stores the measured pressure and elongation values ​​so that they can be output in association with the fastening parts 90.

1. Name of the product in this design: Universal Magnetic Meter Stand. 2. Purpose of this design: For clamping and adjusting gauges and other measuring instruments. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model relates to the field of steel rail measuring equipment, in particular to a steel rail head profile measuring instrument, which comprises a fixed seat, a main machine arranged on the fixed seat, a profile measuring module arranged on the main machine, a telescopic supporting rod, a first standard piece arranged on the fixed seat and used for being carried on a steel rail and capable of being positioned, and a second standard piece arranged on the telescopic supporting rod, one end of the telescopic supporting rod is installed on the fixing base, and the other end of the telescopic supporting rod is provided with a second reference piece which is used for being carried on a steel rail and can be positioned. The system further comprises a track gauge measuring module and / or an ultrahigh measuring module, the track gauge measuring module is used for measuring the distance between the two steel rails, and the ultrahigh measuring module is used for measuring the ultrahigh of the two steel rails. When the profile of the steel rail is measured, the steel rail gauge and / or steel rail superelevation data of the corresponding measuring point can be measured at the same time, the equipment cost is reduced, position deviation is not prone to occurring, and the effectiveness of the data can be guaranteed.

The present invention provides a railway track inspection instrument and its use method. The instrument's gauge marking assembly includes a support plate and a connecting rod. The connecting rod moves in the same direction as the measuring wheel assembly. A rack is disposed on the lower side of the connecting rod. The support plate is fixed to the right end of the machine body. A half gear is disposed on the support plate and meshes with the rack. A coaxial upper full gear is fixed to one side of the half gear. Lower full gears are disposed on the support plates below the upper full gear. A timing belt is mounted on the outer sides of the upper full gear and the two lower full gears. A first through-hole is disposed in the timing belt between the two lower full gears. A spacer belt is fixed in the middle of the first through-hole. A spray head is disposed on the support plate above the first through-hole. A spacer plate is disposed between the spray head and the first through-hole. Spray holes are disposed on the spacer plate at positions corresponding to the first through-hole. The present invention uses only one color to determine whether the track gauge is increasing or decreasing, and the degree of increase or decrease, based on the marking.

The application belongs to the technical field of engine maintenance, and particularly relates to a hole-probe inspection auxiliary device for multiple components after the whole engine test run. The device comprises a positioning chuck (1), a circumferential positioner (2) and a depth gauge (3), the positioning chuck (1) is fixed on a hole-probe instrument seat of an outer-duct casing (7), the circumferential positioner (2) is rotationally arranged at the middle opening of the positioning chuck (1) and has a pointer (24), the depth gauge (3) comprises multiple sliding sleeves and is slidingly arranged on the circumferential positioner (2), a detection line guide tube (6) penetrates through the multiple sliding sleeves and extends into the engine, when the circumferential positioner (2) is rotated, the bottom end of the detection line guide tube (6) is deflected at a specified height directly below the positioning groove (11). The application can determine the specific position of the detection probe and control the movement of the detection probe, and can realize the inspection of special positions and avoid the detection probe from being stuck during the detection process.

The invention discloses a glue joint surface gap detection method for an aircraft composite material assembly, and the method comprises the steps: fixing an assembly composite material on a shape maintaining frame, and enabling a rigid composite material to be stably placed; and a three-dimensional shape measuring instrument is used for respectively measuring space coordinate point clouds of the molded surface of the cementing contact surface and the molded surface of the to-be-cemented surface. And making glue joint area mark points in the matching areas of the to-be-glue-jointed surface molded surface and the glue joint contact surface molded surface by using the data identification, and obtaining the glue joint area mark points. And data registration and iterative alignment from the to-be-glued surface molded surface to the glued contact surface molded surface are completed based on the glued area mark points of the to-be-glued surface molded surface and the glued contact surface molded surface, and a registered to-be-glued surface molded surface space coordinate point cloud is obtained. And finally, selecting the molded surface of the cementing contact surface as a reference surface and the registered molded surface to be cemented as a detection surface, calculating a normal distance D between a space point on the reference surface and a space point on the detection surface, and further obtaining a gap value and a gap area between the reference surface and the detection surface. According to the invention, measurement and simulation calculation are carried out on the composite material assembly in an unassembled state, so that the defect of filler gauge measurement after assembly of parts in the past is overcome, gap detection of any spatial position of the bonding surface of the composite material part can be realized, and relatively good practicability is achieved.

The utility model provides a floating ball liquid level meter. The floating ball liquid level meter comprises a guide rod; the machine head is positioned on one axial side of the guide rod; the installation structure is located between the guide rod and the machine head, the installation structure is provided with a wiring through hole formed in the axial direction of the guide rod, the installation structure comprises an insertion section and an installation section which are arranged in the axial direction of the guide rod, the insertion section is located on the side, close to the guide rod, of the installation section, and a first step structure is formed between the insertion section and the installation section; the first step structure is provided with a first annular step face surrounding the periphery of the insertion section, an annular crimping matching face is arranged on the side, away from the insertion section, of the installation section, and the crimping matching face surrounds the periphery of the connection position of the installation section and the machine head. According to the floating ball liquid level meter provided by the utility model, the instrument mounting pipe which does not need to be assembled with the floating ball liquid level meter is provided with an internal thread, so that the internal thread can be prevented from being arranged on the inner surface of the instrument mounting pipe of the solution tank, and the risk of solution pollution caused by residual stains at the internal thread of the instrument mounting pipe is avoided.

The utility model relates to a transmission shaft retainer inner sphere diameter detector, in particular to a retainer inner sphere diameter detector for a fixed end joint and a movable end joint of a car constant velocity universal joint transmission shaft, which comprises a support, a rotating shaft A, a rotating shaft B and a positioner, a measuring rod A is rotatably connected to the rotating shaft A, the measuring rod A is perpendicular to and fixedly connected with a measuring head A, a measuring rod B is rotatably connected to the rotating shaft B, and the measuring rod B is perpendicular to and fixedly connected with a measuring head B; a gauge rod of the dial gauge and the measuring rod B are fastened through a screw, a contact on the dial gauge makes contact with the end face of a screw installed on the measuring rod A, one end of the bolt penetrates through the measuring rod A and is in spiral connection with the measuring rod B, the spring is sleeved on the bolt, the positioner is provided with a spherical groove, a square notch, a groove opening A and a groove opening B, the square notch is opposite to a reamed hole in the working table plate, the measuring head A is opposite to the groove opening A, and the groove opening B is opposite to the groove opening B. And the measuring head B is opposite to the groove opening B. When the detector is used for measuring the inner ball diameter of the retainer, not only is the measurement convenient, but also the detection precision of the inner ball diameter of the retainer can be ensured.

The utility model relates to a double-isolation static force level gauge for surveying and mapping, which belongs to the technical field of force measuring devices and comprises two guide barrels, two guide push rods and a cavity isolation layer, the two guide barrels are symmetrically arranged in an outer shell, one ends of the two guide barrels are respectively connected with the inner end faces of two end covers, and the other ends of the two guide push rods are respectively connected with the cavity isolation layer. The two guide push rods are inserted into the two guide barrels respectively, one ends of the two guide push rods make contact with the first sensor and the second sensor respectively, the two guide push rods can axially move in the corresponding guide barrels respectively, and the two end faces of the cavity isolation layer are close to the other ends of the two guide barrels respectively. The two end faces of the cavity isolation layer make contact with the other ends of the two guide push rods respectively. The static force level gauge has the beneficial effects that when the pressures in the two separated inner cavities are not equal, the static force level gauge is in a non-static force state, and when the pressures in the two separated inner cavities are equal, the static force level gauge is in a static force state, so that the static force detection between the two cavities is improved.

This invention relates to the field of stepped hole measurement technology, and in particular to a precision internal step gauge. It mainly includes a dial indicator, an internal step gauge body, a support nut, a support spring, a support screw, and an internal groove probe. This invention primarily utilizes a lever to convert linear movement into pointer rotation, and then uses a scale dial for reading the length measurement instrument. Compared to previous profilometers and three-dimensional coordinate measuring machines, this invention allows for online step measurement, offering convenience, flexibility, and high fabricationability.

The utility model discloses an integrated pneumatic measuring device which comprises a base, a double-hole type pneumatic measuring instrument inner diameter measuring head and a double-hole type outer diameter measuring head. The double-hole type air gauge inner diameter measuring head and the double-hole type outer diameter measuring head are both installed on the base. The double-hole type air gauge inner diameter measuring head is arranged in the double-hole type outer diameter measuring head. By means of the mode, the integrated pneumatic testing fixture is formed, the overall structure is simple, operation is more convenient, integrated rapid measurement of the inner diameter and the outer diameter of the workpiece to be measured can be achieved, step-by-step measurement is not needed, the time cost is greatly saved, the measurement efficiency is improved, and the measurement accuracy of the workpiece to be measured is guaranteed by combining high-precision measurement of pneumatic measurement.

The invention discloses a high-precision sheet thickness detector in the technical field of thickness detection, and the high-precision sheet thickness detector comprises a thickness gauge body, a guide feeding roller, a linkage cradle and a clamping positioning roller, and a measuring arm of the thickness gauge body is fixedly provided with an overhanging object placing table corresponding to a measuring end; guide feeding rollers with upper edge lines flush with the top surface of the overhanging object placing table are arranged on the two sides of the overhanging object placing table, an equipment box in sliding connection with the measuring arm is arranged at the rear ends of the two sets of guide feeding rollers, and a driving part used for controlling the two sets of guide feeding rollers to rotate synchronously is arranged in the equipment box; the problems that in the prior art, a thin material thickness gauge is not convenient to achieve automatic continuous detection, detection points are prone to being distributed unevenly, defects are prone to missing detection and the like, a bag-shaped or annular thin film needs to be cut into single pieces in advance, the actual thickness measurement operation is tedious, and the instrument cannot meet the requirements for continuous, efficient and nondestructive detection are solved.